Multi-adaptive anti-backflow quick-connection plug

Abstract

The invention relates to a multi-adaptive anti-reflux quick-connection plug, and belongs to the technical field of quick-connection plug devices, and the multi-adaptive anti-reflux quick-connection plug comprises a male plug; 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-connect plug devices, and in particular to a quick-connect plug with multiple adaptability and anti-backflow function. Background Art

[0002] The emergency power supply is composed of chargers, inverters, batteries, isolation transformers, switching switches and other devices. It is a power supply that converts DC power into AC power. When industrial and civil buildings are in an emergency state, it can supply power to electrical equipment.

[0003] The existing emergency power connector includes a male plug and a female plug. After the male plug and the female plug are plugged in place, the emergency power can be quickly connected. However, when the emergency power is connected to the power grid, if the mains power is not completely disconnected, power may be transmitted back to the power grid through the connector, causing the possibility of electric shock to personnel or damage to equipment.

[0004] Secondly, previous quick-connect plugs may fail to disconnect automatically due to overheating during operation, and the entire circuit system will continue to work until the circuit system is damaged. Summary of the invention

[0005] In order to reduce the possibility of the emergency power supply transmitting power in reverse to the power grid and ensure power supply safety, the present application provides a multi-adaptive anti-backflow quick-connect plug.

[0006] The present application provides a multi-matching anti-backflow quick-connect plug, which adopts the following technical solution: A quick-connect plug with multiple adaptability and anti-backflow function, comprising: Male plug; A female plug, adapted to be plugged into the male plug; An auxiliary operating part is arranged on the female plug, and a common terminal, a normally open contact and a normally closed contact are arranged on the auxiliary operating part, wherein the common terminal is electrically connected to the plug-in terminal of the female plug, the normally open contact is used to connect the emergency power supply, and the normally closed contact is used to connect the mains power. An escape mechanism is arranged on the male plug, an assembly mechanism is arranged on the male plug, an isolation mechanism is arranged on the auxiliary operating part, and a disassembly core is arranged inside the female plug.

[0007] By adopting the above technical solution, by setting a common terminal, a normally open contact and a normally closed contact on the auxiliary operating part, it is convenient for the auxiliary operating part and the external operating rod or operating button to form a single-pole double-throw switch. The auxiliary operating part is installed on the female plug. On the one hand, it is convenient to manually switch the circuit between "mains power supply" and "emergency power supply". When the mains power fails, it can quickly switch to the emergency power supply to ensure that key equipment is not disconnected; 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. Through physical isolation, it is ensured 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 power supply safety.

[0008] Optionally, the auxiliary operating member is provided with a positioning plug-in portion, and the female plug is provided with a positioning plug-in groove matched with the positioning plug-in portion.

[0009] By adopting the above technical solution, it is convenient to fix and assemble the auxiliary operating part to the designated position on the female plug, thereby improving the assembly efficiency and assembly accuracy of the plug device.

[0010] Optionally, the auxiliary operating component is a plastic shell structure.

[0011] By adopting the above technical solution, the auxiliary operating part is set as a fixed carrier of the common terminal, the normally open contact and the normally closed contact, and is configured as a plastic shell structure, so that it has a certain structural strength while reducing its own weight, which is conducive to lightweighting of the product.

[0012] Optionally, a fixed panel is provided on the female plug, and a through hole is provided on the fixed panel for the female plug to pass through. A protective cover is provided on the side of the fixed panel close to the plug-in end of the female plug. The protective cover is movably or detachably connected to the fixed panel, and a tongue is provided on the edge of the protective cover.

[0013] By adopting the above technical solution, the plugging end of the female plug can be covered and protected by the protective cover, thereby improving the waterproof and dustproof effects of the plug device.

[0014] Optionally, one end of the protective cover is hinged to the fixed panel.

[0015] By adopting the above technical solution, when in use, it is necessary to flip the protective cover so that the protective cover is in an open state, thereby facilitating the plugging of the male plug and the female plug, which is convenient to use.

[0016] Optionally, a limiting portion and a limiting ring are provided on the female plug, the limiting portion abuts against one side of the fixed panel, and the limiting ring abuts against the other side of the fixed panel.

[0017] By adopting the above technical solution, the limiting part and the limiting ring can limit the two sides of the fixed panel, reduce the possibility of displacement between the fixed panel and the female plug, and ensure the fixing effect of the fixed panel.

[0018] Optionally, the limiting portion and the female plug are integrally formed, and the limiting ring is detachably connected to the female plug.

[0019] By adopting the above technical solution, when assembling the fixed panel, after the female plug is passed through the through hole, the fixed panel is fixed between the limiting part and the limiting ring by the limiting ring, thereby realizing the assembly of the fixed panel.

[0020] Optionally, the female plug is provided with an external thread, and the inner ring of the limiting ring is provided with an internal thread that matches the external thread.

[0021] By adopting the above technical solution, the limiting ring is connected to the female plug thread, the structure is simple and it is convenient to assemble the fixed panel.

[0022] Optionally, the isolation mechanism includes a spring cover on the side wall of the auxiliary operating part, the spring cover covers the common end, the normally open contact and the normally closed contact, and two isolation slots are arranged on the side wall of the auxiliary operating part, and a first isolation plate and a second isolation plate are slidably inserted inside the isolation slots, the first isolation plate is inserted between the common end and the normally open contact, and the second isolation plate is inserted between the common end and the normally closed contact.

[0023] Optionally, the escape mechanism includes a fixing ring and a hot melt ring on the outer wall of the male plug, the hot melt ring is attached to the insertion hole port of the female plug, and a circular array of energy storage shrapnel is arranged on the side wall of the fixing ring. The other end of the energy storage shrapnel abuts against the side wall of the hot melt ring, and an encapsulation mechanism is arranged on the outside of the energy storage shrapnel.

[0024] Optionally, the encapsulation mechanism includes a wrapping bag outside the energy storage shrapnel.

[0025] Optionally, the assembly mechanism includes an assembly tube and a fixed tube, the material of the fixed tube is hot-melt plastic, the fixed tube is hot-melt in a shallow groove of the wall, the assembly tube is installed at the tail of the female plug, the inner wall of the fixed tube is provided with a hook pattern, the outer wall of the assembly tube is provided with a ring array of expansion grooves, an expansion block is movably provided inside the expansion groove, the outer wall of the expansion block is provided with docking teeth matching the hook pattern, the expansion block is fixed to the inner wall of the assembly tube by an elastic block, and an expansion power mechanism is provided in the middle position of the expansion block.

[0026] Optionally, the expansion power mechanism includes a pressure ring, a slope surface is provided on the inner side wall of the expansion block, the pressure ring is attached to the slope surface of the expansion block, and the pressure ring is connected to the pressure mechanism.

[0027] Optionally, the pressure mechanism includes two axial holes on the pressure ring, pressure screws are rotatably arranged inside the two axial holes, a nut matching the pressure screw is arranged on the end face of the assembly cylinder, the pressure screw passes through the middle of the nut, and a wrench is arranged at the end of the pressure screw.

[0028] Optionally, the replaceable core includes an internal plug-in liner inside the insertion hole, an expansion slot is provided on the side wall of the plug-in liner, six built-in spring clips in a circular array are provided on the inner side wall of the plug-in liner, clamping grooves are provided on two built-in spring clips with the expansion slot as the symmetry center, a docking bridge is provided on the outer side wall of the plug-in liner, a docking plug is inserted into the interior of the docking bridge, and the docking plug is connected to a common end.

[0029] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting a common terminal, a normally open contact and a normally closed contact on the auxiliary operating part, it is convenient for the auxiliary operating part to form a single-pole double-throw switch with the external operating lever or operating button. The installation of the auxiliary operating part on the female plug facilitates the manual switching of the circuit between "mains power supply" and "emergency power supply". When the mains power fails, it can quickly switch to the emergency power supply to ensure that key equipment is not disconnected from the power supply. 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. Through physical isolation, it is ensured 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 power supply safety.

[0030] 2. By setting the positioning plug-in portion and the positioning plug-in groove, it is convenient to fix and assemble the auxiliary operating part to the designated position on the female plug, thereby improving the assembly efficiency and assembly accuracy of the plug device.

[0031] 3. By setting the fixed panel and the protective cover, the protective cover can cover and protect the plug end of the female plug, thereby improving the waterproof and dustproof effect of the plug device.

[0032] 4. When the connection between the male and female plugs is overheated, the hot melt ring of the male plug attached to the plug hole port will soften and melt. At this time, the energy storage shrapnel will release potential energy to pop the male plug out, and then the charging link can be mechanically disconnected to ensure the safety of electricity use.

[0033] 5. During the assembly process, the female plug heats the fixing tube and melts it into the groove of the wall. At this time, the assembly tube is aligned with the fixing tube and inserted. The staff manually rotates the two threaded rods. During the rotation, the two threaded rods drag the pressure ring inward. When the pressure ring hits the slope surface, all the expansion blocks are pushed out until the docking teeth on the outer wall of all the expansion blocks lock the hook pattern, realizing the function of convenient disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of a multi-adaptable anti-backflow quick-connect plug according to an embodiment of the present application.

[0035] Figure 2 It is a schematic diagram of the specific structure of the female plug in the embodiment of the present application.

[0036] Figure 3 It is a schematic diagram of the specific structure of the auxiliary operating parts in the embodiment of the present application.

[0037] Figure 4 It is a schematic diagram of the internal structure of the auxiliary operating part in the embodiment of the present application.

[0038] Figure 5 It is an exploded view showing the assembly relationship among the female plug, the auxiliary operating member and the fixed panel in the embodiment of the present application.

[0039] Figure 6 It is a schematic diagram of the front view structure in the embodiment of the present application.

[0040] Figure 7 It is a schematic cross-sectional view of a wrapping bag in an embodiment of the present application.

[0041] Figure 8 It is a schematic diagram of the plug-in inner tank in the embodiment of the present application.

[0042] Fig. 9 It is a partially enlarged schematic diagram of the plug-in inner liner A in the embodiment of the present application.

[0043] Fig.10 It is a schematic diagram of the assembly of the auxiliary operating parts in the embodiment of the present application.

[0044] Fig.11 It is a schematic diagram of an assembly tube in an embodiment of the present application.

[0045] Fig.12 It is a partially enlarged schematic diagram of the assembly tube B in the embodiment of the present application.

[0046] Description of reference numerals: 1. male plug; 2. female plug; 21. positioning and plugging groove; 22. limiting part; 23. limiting ring; 231. internal thread; 24. external thread; 3. auxiliary operating member; 31. common terminal; 32. normally open contact; 33. normally closed contact; 34. positioning and plugging part; 35. first isolation plate; 36. second isolation plate; 37. spring cover; 4. fixed panel; 41. through hole; 5. protective cover; 51. Tongue; 6. Wrapping bag; 61. Fixing ring; 62. Energy storage spring; 63. Hot melt ring; 7. Assembly tube; 71. Expansion block; 72. Docking teeth; 73. Elastic block; 74. Pressure ring; 75. Pressure screw; 76. Nut; 77. Wrench; 8. Insert liner; 81. Expansion slot; 82. Built-in spring; 83. Clamping slot; 84. Docking bridge; 85. Docking plug; 9. Fixing tube; 91. Hook pattern. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-5 , further details of this application are given.

[0048] Example:

[0049] The present application embodiment discloses a quick-connect plug with multiple adaptability and anti-backflow function. Figure 1-Figure 4 A quick-connect plug with multiple adaptability and anti-backflow function, comprising a male plug 1 and a female plug 2 that is plugged and adapted with the male plug 1, wherein one end of the female plug 2 that is plugged with the male plug 1 is its plugging end. In order to improve the safety of the plug device, an auxiliary operating part 3 is fixedly arranged on the female plug 2, and three auxiliary contacts are arranged on the auxiliary operating part 3, 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 plugging end of the female plug 2, the normally open contact 32 is used to connect the emergency power supply, and the normally closed contact 33 is used to connect the mains power; the male plug 1 is provided with an escape mechanism, the male plug 1 is provided with an assembly mechanism, the auxiliary operating part 3 is provided with an isolation mechanism, and the female plug 2 is provided with a disassembly core inside.

[0050] When in use, by setting a common terminal 31, a normally open contact 32 and a normally closed contact 33 on the auxiliary operating part 3, it is convenient for the auxiliary operating part 3 to form a single-pole double-throw switch with an external operating rod or operating button. The auxiliary operating part 3 is installed on the female plug 2. On the one hand, it is convenient to manually switch the circuit between "mains power supply" and "emergency power supply". When the mains power fails, it can quickly switch to the emergency power supply to ensure that key equipment is not disconnected; 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 connected to the common terminal 31, and the normally closed contact 33 is disconnected from the common terminal 31. Through physical isolation, it is ensured 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 power supply safety.

[0051] Reference Figure 4-Figure 5 In order to facilitate the fixed assembly of the auxiliary operating member 3 to the specified position on the female plug 2 and improve the assembly efficiency and assembly accuracy of the plug device, a positioning plug-in portion 34 is integrally formed on the auxiliary operating member 3, and a positioning plug-in groove 21 adapted to the positioning plug-in portion 34 is opened on the female plug 2.

[0052] Reference Figure 4 The auxiliary operating part 3 is a plastic shell structure. In this way, the auxiliary operating part 3 is used as a fixed carrier of the common terminal 31, the normally open contact 32 and the normally closed contact 33, and is set to a plastic shell structure, so that it has a certain structural strength while reducing its own weight, which is conducive to the lightweight of the product.

[0053] Reference Figure 2 and Figure 5 The female plug 2 is fixedly equipped with a fixed panel 4, which is provided with a through hole 41 for the female plug 2 to pass through. A protective cover 5 is provided on the side of the fixed panel 4 close to the plug-in end of the female plug 2. The protective cover 5 is movably connected or detachably connected to 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 effects of the plug device.

[0054] Reference Figure 1 and Figure 2 Furthermore, in this embodiment, one end of the protective cover 5 is hinged on the fixed panel 4, and the other end of the protective cover 5 is integrally formed with a tongue 51, which protrudes from the outer contour of the fixed panel 4, so that the operator can turn the protective cover 5. When in use, after the protective cover 5 is turned over, the protective cover 5 is in an open state, so that the male plug 1 and the female plug 2 can be plugged in easily, which is convenient for use.

[0055] Reference Figure 1 , Figure 2 and Figure 5 The female plug 2 is also 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 between the fixed panel 4 and the female plug 2, and ensure the fixing effect of the fixed panel 4.

[0056] Reference Figure 1 , Figure 2 and Figure 5The limiting portion 22 is integrally formed with the female plug 2, an external thread 24 is provided on the outer side of the female plug 2, and an internal thread 231 matching the external thread 24 is provided on the inner ring of the limiting ring 23. In this way, the limiting ring 23 is threadedly connected to the female plug 2 to achieve a detachable connection. When assembling the fixed panel 4, after the female plug 2 is passed through the through hole 41, the fixed panel 4 is fixed between the limiting portion 22 and the limiting ring 23 by the limiting ring 23, thereby achieving the assembly of the fixed panel 4. The assembly structure is simple, which is convenient for assembling the fixed panel 4 and the protective cover 5.

[0057] The implementation principle of a multi-matching anti-backflow quick-connect plug in the embodiment of the present application is as follows: when using the device, by setting a common terminal 31, a normally open contact 32 and a normally closed contact 33 on the auxiliary operating part 3, it is convenient for the auxiliary operating part 3 to form a single-pole double-throw switch with an external operating rod or operating button. The auxiliary operating part 3 is installed on the female plug 2. On the one hand, it is convenient to manually switch the circuit between "mains power supply" and "emergency power supply". When the mains power fails, it can quickly switch to the emergency power supply to ensure that key equipment is not disconnected; 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 connected to the common terminal 31, and the normally closed contact 33 is disconnected from the common terminal 31. Through physical isolation, it is ensured 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 power supply safety.

[0058] Reference Figure 6 , Figure 7 and Fig.10 The isolation mechanism includes a spring cover plate 37 on the side wall of the auxiliary operating member 3, and the spring cover plate 37 covers the common terminal 31, the normally open contact 32 and the normally closed contact 33. Two isolation slots are arranged on the side wall of the auxiliary operating member 3, and a first isolation plate 35 and a second isolation plate 36 are slidably inserted inside the isolation slot. The first isolation plate 35 is inserted between the common terminal 31 and the normally open contact 32, and the second isolation plate 36 is inserted between the common terminal 31 and the normally closed contact 33. When the common terminal 31 and the normally open contact 32 are connected, the second isolation plate 36 is inserted into the gap between the common terminal 31 and the normally closed contact 33. When the common terminal 31 and the normally closed contact 33 are connected, the first isolation plate 35 is inserted into the gap between the common terminal 31 and the normally open contact 32 to avoid arcing caused by the electrodes being too close.

[0059] Reference Figure 6 , Figure 7The escape mechanism includes a fixing ring 61 and a hot melt ring 63 on the outer wall of the male plug 1. The hot melt ring 63 is attached to the insertion hole port of the female plug 2. A circular array of energy storage springs 62 are arranged on the side wall of the fixing ring 61. The other end of the energy storage spring 62 abuts against the side wall of the hot melt ring 63. A capsule mechanism is arranged on the outer side of the energy storage spring 62. When the connection between the male plug 1 and the female plug 2 is overheated, the hot melt ring 63 of the male plug 1 attached to the insertion hole port will soften and melt. At this time, the energy storage spring 62 will release potential energy to pop out the male plug 1, and then the charging link can be mechanically disconnected to ensure the safety of electricity use.

[0060] Reference Figure 6 , Figure 7 The encapsulation mechanism includes an encapsulation bag 6 outside the energy storage shrapnel 62, and the encapsulation bag 6 encapsulates all the energy storage shrapnel 62 to prevent the energy storage shrapnel 62 from scratching people.

[0061] Reference Fig.11 , Fig.12 The assembling mechanism comprises an assembling tube 7 and a fixing tube 9. The fixing tube 9 is made of hot-melt plastic. The fixing tube 9 is hot-melted in a shallow groove of the wall. The assembling tube 7 is installed at the tail of the female plug 2. A hook pattern 91 is arranged on the inner wall of the fixing tube 9. An annular array of expansion grooves is arranged on the outer wall of the assembling tube 7. An expansion block 71 is movably arranged inside the expansion groove. A docking tooth 72 matching the hook pattern 91 is arranged on the outer wall of the expansion block 71. The expansion block 71 is fixed to the inner wall of the assembling tube 7 by an elastic block 73. An expansion power mechanism is arranged in the middle position of the expansion block 71. During the assembly process, the female plug heats the fixing tube 9 and melts it into the groove of the wall. At this time, the assembling tube 7 is aligned with the fixing tube 9 and inserted, and all the expansion blocks 71 are pushed outward until the docking teeth 72 on the outer walls of all the expansion blocks 71 lock the hook pattern 91, thereby realizing the function of convenient disassembly.

[0062] Reference Fig.11 , Fig.12 The expansion power mechanism includes a pressure ring 74. A slope surface is provided on the inner wall of the expansion block 71. The pressure ring 74 is attached to the slope surface of the expansion block 71, and the pressure ring 74 is connected to the pressure mechanism. The pressure ring 74 is pushed inward. When the pressure ring 74 hits the slope surface, all the expansion blocks 71 are pushed out.

[0063] Reference Fig.12The pressure mechanism includes two axial holes on the pressure ring 74, and pressure screws 75 are rotatably arranged inside the two axial holes. A nut 76 matching the pressure screw 75 is arranged on the end face of the assembly cylinder 7. The pressure screw 75 passes through the middle of the nut 76. A wrench 77 is arranged at the end of the pressure screw 75. The staff manually rotates the two threaded rods, and the threaded rods will be inserted in the middle of the nut 76 and apply inward pressure to the pressure ring 74.

[0064] Reference Figure 8 , Fig. 9 The replaceable core includes an internal plug-in liner 8 inside the insertion hole, and an expansion slot 81 is provided on the side wall of the plug-in liner 8. Six built-in spring pieces 82 in a circular array are provided on the inner side wall of the plug-in liner 8. Two built-in spring pieces 82 with the expansion slot 81 as the symmetric center are provided with a clamping groove 83. A docking bridge 84 is provided on the outer side wall of the plug-in liner 8. A docking plug piece 85 is inserted into the docking bridge 84, and the docking plug piece 85 is connected to the common end 31. The staff pinches the two clamping grooves 83 with pliers. At this time, the gap of the expansion slot 81 will become smaller, and the diameter of the plug-in liner 8 will also become smaller. When the plug-in liner 8 enters the inside of the insertion hole, the docking bridge 84 and the docking plug piece 85 are merged, thereby realizing the effect of convenient replacement of the contact core. Compared with the plug-in structure of the prior art, long-term plug-in and pull-out will cause the contact core to deform and thus have poor contact.

[0065] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A quick-connect plug with multiple adaptability and anti-backflow function, characterized in that: include: Male plug (1); A female plug (2) adapted to be plugged into the male plug (1); An auxiliary operating member (3) is arranged on the female plug (2), and is provided with a common terminal (31), a normally open contact (32) and a normally closed contact (33), wherein the common terminal (31) is electrically connected to the plug-in terminal of the female plug (2), the normally open contact (32) is used to connect to an emergency power supply, and the normally closed contact (33) is used to connect to a mains power supply; The male plug (1) is provided with an escape mechanism, the male plug (1) is provided with an assembly mechanism, the auxiliary operating member (3) is provided with an isolation mechanism, and the female plug (2) is provided with a disassembly core inside.

2. A multi-adaptable anti-backflow quick-connect plug according to claim 1, characterized in that: The auxiliary operating member (3) is provided with a positioning plug-in portion (34), and the female plug (2) is provided with a positioning plug-in groove (21) matched with the positioning plug-in portion (34).

3. The multi-adaptable anti-backflow quick-connect plug according to claim 1, characterized in that: The auxiliary operating part (3) is a plastic shell structure.

4. The multi-adaptable anti-backflow quick-connect plug according to claim 1, characterized in that: 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, the fixed panel (4) is provided with a protective cover (5) on one side close to the plug-in end of the female plug (2), the protective cover (5) is movably connected or detachably connected to the fixed panel (4), and the edge of the protective cover (5) is provided with a tongue (51).

5. The multi-adaptable anti-backflow quick-connect plug according to claim 4, characterized in that: One end of the protective cover (5) is hinged to the fixed panel (4).

6. The multi-adaptable anti-backflow quick-connect plug according to claim 4, characterized in that: The female plug (2) is provided with a limiting portion (22) and a limiting ring (23); 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).

7. The multi-adaptable anti-backflow quick-connect plug according to claim 6, characterized in that: The limiting portion (22) and the female plug (2) are integrally formed, and the limiting ring (23) and the female plug (2) are detachably connected.

8. The multi-adaptable anti-backflow quick-connect plug according to claim 7, characterized in that: The female plug (2) is provided with an external thread (24), and the inner ring of the limiting ring (23) is provided with an internal thread (231) that matches the external thread (24).

9. The multi-adaptable anti-backflow quick-connect plug according to claim 1, characterized in that: The isolation mechanism comprises a spring cover plate (37) on a side wall of the auxiliary operating member (3), the spring cover plate (37) covering the common terminal (31), the normally open contact (32) and the normally closed contact (33), and two isolation slots are provided on the side wall of the auxiliary operating member (3), a first isolation plate (35) and a second isolation plate (36) are slidably inserted into the isolation slots, the first isolation plate (35) is inserted between the common terminal (31) and the normally open contact (32), and the second isolation plate (36) is inserted between the common terminal (31) and the normally closed contact (33).

10. The multi-adaptable anti-backflow quick-connect plug according to claim 1, characterized in that: The escape mechanism comprises a fixing ring (61) and a hot melt ring (63) on the outer wall of the male plug (1); the hot melt ring (63) is fitted on the insertion hole of the female plug (2); a circular array of energy storage springs (62) is arranged on the side wall of the fixing ring (61); the other end of the energy storage springs (62) abuts against the side wall of the hot melt ring (63); and an encapsulation mechanism is arranged on the outer side of the energy storage springs (62).

11. The multi-adaptable anti-backflow quick-connect plug according to claim 10, characterized in that: The encapsulation mechanism comprises an encapsulation bag (6) outside the energy storage shrapnel (62).

12. The multi-adaptable anti-backflow quick-connect plug according to claim 1, characterized in that: The assembly mechanism comprises an assembly tube (7) and a fixed tube (9). The fixed tube (9) is made of hot-melt plastic. The fixed tube (9) is hot-melt in a shallow groove of a wall. The assembly tube (7) is mounted on the tail of the female plug (2). The inner wall of the fixed tube (9) is provided with a hook pattern (91). The outer wall of the assembly tube (7) is provided with a ring-shaped array of expansion grooves. An expansion block (71) is movably provided inside the expansion groove. The outer wall of the expansion block (71) is provided with docking teeth (72) matching the hook pattern (91). The expansion block (71) is fixed to the inner wall of the assembly tube (7) by means of an elastic block (73). An expansion power mechanism is provided in the middle of the expansion block (71).

13. The multi-adaptable anti-backflow quick-connect plug according to claim 12, characterized in that: The expansion power mechanism comprises a pressure ring (74), the inner side wall of the expansion block (71) is provided with a slope surface, the pressure ring (74) is fitted on the slope surface of the expansion block (71), and the pressure ring (74) is connected to the pressure mechanism.

14. The multi-adaptable anti-backflow quick-connect plug according to claim 13, characterized in that: The pressure mechanism comprises two axial holes on a pressure ring (74), pressure screws (75) are rotatably arranged inside the two axial holes, a nut (76) matching the pressure screw (75) is arranged on the end surface of the assembly cylinder (7), the pressure screw (75) passes through the middle of the nut (76), and a wrench (77) is arranged at the end of the pressure screw (75).

15. The multi-adaptable anti-backflow quick-connect plug according to claim 1, characterized in that: The replaceable core comprises an internal plug-in liner (8) inside the insertion hole, an expansion slot (81) is provided on the side wall of the plug-in liner (8), six internal spring pieces (82) in a ring array are provided on the inner side wall of the plug-in liner (8), and clamping slots (83) are provided on two internal spring pieces (82) with the expansion slot (81) as the symmetric center, and a docking bridge (84) is provided on the outer side wall of the plug-in liner (8), and a docking plug piece (85) is inserted into the interior of the docking bridge (84), and the docking plug piece (85) is connected to the common end (31).

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