A multi-fitting anti-backflow quick-connect plug

Abstract

The present application relates to a multi-fitting anti-backflow quick-connect plug, belonging to the technical field of quick-connect plug devices, and comprising: a male plug; a female plug, which is inserted and adapted to the male plug; an auxiliary operating member, which 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 member. Among them, the common terminal is electrically connected to the insertion end of the female plug, the normally open contact is used for connecting an emergency power supply, and the normally closed contact is used for connecting the mains power. In the present application, by configuring an auxiliary operating member on the female plug, when the mains power is interrupted, the operator switches the power supply to the emergency power supply through a switch, the normally open contact is conducted with the common terminal, and at the same time the normally closed contact is disconnected from the common terminal, so as to ensure that the emergency power supply and the mains power cannot be conducted simultaneously through physical isolation, thereby avoiding the risk of reverse current generated when the emergency power supply is connected to the power grid and ensuring the power supply safety.

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:

[0007] A quick-connect plug with multiple adaptability and anti-backflow function, comprising:

[0008] Male plug;

[0009] A female plug, adapted to be plugged into the male plug;

[0010] An auxiliary operating member is provided on the female plug, and a common terminal, a normally open contact and a normally closed contact are provided on the auxiliary operating member, 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 provided on the male plug, an assembly mechanism is provided on the male plug, an isolation mechanism is provided on the auxiliary operating member, and a disassembly core is provided inside the female plug;

[0011] The assembly mechanism includes an assembly cylinder and a fixing cylinder. The fixing cylinder is made of hot-melt plastic and is hot-melted in the shallow groove of the wall. The assembly cylinder is installed at the tail of the female plug. The inner side wall of the fixing cylinder is provided with hook patterns, and the outer side wall of the assembly cylinder is provided with an annular array of expansion grooves. An expansion block is movably arranged inside the expansion groove. The outer side wall of the expansion block is provided with docking teeth that match the hook patterns. The expansion block is fixed to the inner side wall of the assembly cylinder through an elastic block. A swelling power mechanism is arranged at the middle position of the expansion block; the swelling power mechanism includes a pressure ring. A slope surface is arranged on the inner side wall of the expansion block. The pressure ring fits on the slope surface of the expansion block and is connected to a pressure mechanism; the pressure mechanism includes two shaft holes on the pressure ring. A pressure screw is rotatably arranged inside the two shaft holes. A nut that matches the pressure screw is arranged on the end surface 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.

[0012] By adopting the above technical solution, by arranging a common end, a normally open contact, and a normally closed contact on the auxiliary operating part, it is convenient for the auxiliary operating part and an external operating rod or operating button to form a single-pole double-throw switch. When the auxiliary operating part is added to the female plug, on the one hand, it is convenient to manually switch the circuit between "mains power supply" and "emergency power supply". When there is a mains power failure, it can be quickly switched to the emergency power supply to ensure that critical equipment does not lose power; 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 conducted with the common end, and at the same time, the normally closed contact is disconnected from the common end. Through physical isolation, it is ensured that the emergency power supply and the mains power cannot be conducted simultaneously, thereby avoiding the risk of reverse current when the emergency power supply is connected to the power grid and ensuring power supply safety.

[0013] Optionally, the auxiliary operating part is provided with a positioning insertion part, and the female plug is provided with a positioning insertion groove adapted to the positioning insertion part.

[0014] By adopting the above technical solution, it is convenient to fixedly assemble the auxiliary operating part to the specified position on the female plug, improving the assembly efficiency and assembly accuracy of the plug device.

[0015] Optionally, the auxiliary operating part is of a plastic shell structure.

[0016] By adopting the above technical solution, the auxiliary operating part, as the fixed carrier of the common end, the normally open contact, and the normally closed contact, is set to a plastic shell structure, which has a certain structural strength while reducing its own weight, being beneficial to the lightweight of the product.

[0017] Optionally, a fixed panel is provided on the female plug. A through hole for the female plug to penetrate is provided on the fixed panel. A protective cover is provided on one side of the fixed panel close to the insertion end of the female plug. The protective cover is movably connected or detachably connected to the fixed panel, and a tongue is provided at the edge of the protective cover.

[0018] By adopting the above technical solution, the insertion end of the female plug can be covered and protected by the protective cover, improving the waterproof and dustproof effects of the plug device.

[0019] Optionally, one end of the protective cover is hinged to the fixed panel.

[0020] By adopting the above technical solution, during use, it is necessary to flip the protective cover to make the protective cover in an open state, so as to facilitate the insertion of the male plug and the insertion end of the female plug, and it is convenient to use.

[0021] 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.

[0022] By adopting the above technical solution, the limiting portion and the limiting ring can limit both sides of the fixed panel, reducing the possibility of displacement between the fixed panel and the female plug, and ensuring the fixing effect of the fixed panel.

[0023] Optionally, the limiting portion is integrally formed with the female plug, and the limiting ring is detachably connected to the female plug.

[0024] By adopting the above technical solution, when assembling the fixed panel, after passing the female plug through the through hole, the fixed panel is fixed between the limiting portion and the limiting ring through the limiting ring, thereby realizing the assembly of the fixed panel.

[0025] Optionally, an external thread is provided on the female plug, and an internal thread adapted to the external thread is provided on the inner ring of the limiting ring.

[0026] By adopting the above technical solution, the limiting ring is threadedly connected to the female plug, with a simple structure and convenient for assembling the fixed panel.

[0027] Optionally, the isolation mechanism includes a shrapnel cover plate on the side wall of the auxiliary operating member. The shrapnel cover plate covers the common terminal, the normally open contact and the normally closed contact. Two isolation slots are provided on the side wall of the auxiliary operating member. 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 terminal and the normally open contact, and the second isolation plate is inserted between the common terminal and the normally closed contact.

[0028] Optionally, the escape mechanism includes a fixing ring and a heat-melting ring on the outer wall of the male plug. The heat-melting ring fits on the insertion hole port of the female plug. An annular array of energy storage elastic pieces is arranged on the side wall of the fixing ring, and the other end of the energy storage elastic piece abuts against the side wall of the heat-melting ring. A wrapping mechanism is arranged outside the energy storage elastic piece.

[0029] Optionally, the wrapping mechanism includes a wrapping bag outside the energy storage elastic piece.

[0030] Optionally, the replaceable core includes an internal plugging inner liner inside the insertion hole. Expansion slots are arranged on the side wall of the plugging inner liner. Six internal elastic pieces in an annular array are arranged on the inner side wall of the plugging inner liner. Clamping grooves are arranged on two internal elastic pieces symmetrically centered on the expansion slots. A docking plug bridge is arranged on the outer side wall of the plugging inner liner, and a docking plug piece is inserted inside the docking plug bridge. The docking plug piece is connected to the common end.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. By arranging a common end, a normally open contact and a normally closed contact on the auxiliary operating piece, it is convenient for the auxiliary operating piece and an external operating rod or operating button to form a single-pole double-throw switch. By installing this auxiliary operating piece 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 there is a mains power failure, it can be quickly switched to the emergency power supply to ensure that critical 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 conducts with the common end, and at the same time, the normally closed contact disconnects from the common end. Through physical isolation, it is ensured that the emergency power supply and the mains power cannot be conducted simultaneously, thereby avoiding the risk of reverse current when the emergency power supply is connected to the power grid and ensuring power supply safety.

[0033] 2. Through the arrangement of the positioning plugging part and the positioning plugging groove, it is convenient to fixedly assemble the auxiliary operating piece to the specified position on the female plug, improving the assembly efficiency and assembly accuracy of the plug device.

[0034] 3. Through the arrangement of the fixing panel and the protective cover, the insertion end of the female plug can be covered and protected by the protective cover, improving the waterproof and dustproof effects of the plug device.

[0035] 4. When the connection between the male plug and the female plug is overheated, the heat-melting ring where the male plug fits on the insertion hole port will soften and melt. At this time, the energy storage elastic piece will release potential energy to eject the male plug, thereby mechanically disconnecting the charging connection to ensure the safety of electricity use.

[0036] 5. During the assembly of the female plug, the fixing cylinder is heated and melted into the groove in the wall. At this time, the assembly cylinder is aligned with the fixing cylinder and inserted. The staff manually rotates the two threaded rods. During the rotation of the two threaded rods, the pressure ring is dragged inward. When the pressure ring touches the inclined surface, all the expansion blocks are pushed outwards until the docking teeth on the outer side walls of all the expansion blocks lock the hook patterns, realizing the function of convenient disassembly. Brief Description of the Drawings

[0037] Figure 1 is the overall structural schematic diagram of a multi-fitting anti-backflow quick-connect plug according to an embodiment of the present application.

[0038] Figure 2 is the specific structural schematic diagram of the female plug in the embodiment of the present application.

[0039] Figure 3 is the specific structural schematic diagram of the auxiliary operating part in the embodiment of the present application.

[0040] Figure 4 is the schematic diagram showing the internal structure of the auxiliary operating part in the embodiment of the present application.

[0041] Figure 5 is the exploded view showing the assembly relationship of the female plug, the auxiliary operating part and the fixing panel in the embodiment of the present application.

[0042] Figure 6 is the front view structural schematic diagram in the embodiment of the present application.

[0043] Figure 7 is the sectional view schematic diagram of the wrapping bladder in the embodiment of the present application.

[0044] Figure 8 is the schematic diagram of the plug-in inner bladder in the embodiment of the present application.

[0045] Figure 9 is the partial enlarged schematic diagram of the plug-in inner bladder A in the embodiment of the present application.

[0046] Figure 10 is the assembly schematic diagram of the auxiliary operating part in the embodiment of the present application.

[0047] Figure 11 is the schematic diagram of the assembly cylinder in the embodiment of the present application.

[0048] Figure 12 is the partial enlarged schematic diagram of the assembly cylinder B in the embodiment of the present application.

[0049] 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

[0050] The following is combined with Figures 1-5 , further details of this application are given. Example

[0051] The present application embodiment discloses a quick-connect plug with multiple adaptability and anti-backflow function. Figures 1-4 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.

[0052] 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.

[0053] ReferenceFigures 4-5 , to facilitate the fixed assembly of the auxiliary operating member 3 to a specified position on the female plug 2 and improve the assembly efficiency and accuracy of the plug device, a positioning and plugging portion 34 is integrally formed on the auxiliary operating member 3, and a positioning and plugging groove 21 adapted to the positioning and plugging portion 34 is provided on the female plug 2.

[0054] Refer to Figure 4 , the auxiliary operating member 3 is a plastic housing structure. In this way, the auxiliary operating member 3, as a fixed carrier for the common terminal 31, normally open contact 32 and normally closed contact 33, is set as a plastic housing structure, which not only has a certain structural strength but also reduces its own weight, facilitating the lightweight of the product.

[0055] Refer to Figure 2 and Figure 5 , a fixed panel 4 is fixedly assembled on the female plug 2. A through hole 41 for the female plug 2 to pass through is provided on the fixed panel 4. A protective cover 5 is provided on one side of the fixed panel 4 close to the plugging end of the female plug 2. The protective cover 5 is movably connected or detachably connected to the fixed panel 4. The plugging end of the female plug 2 can be covered and protected by the protective cover 5, improving the waterproof and dustproof effects of the plug device.

[0056] Refer to Figure 1 and Figure 2 , further, in this embodiment, one end of the protective cover 5 is hinged to the fixed panel 4, and a tongue 51 is integrally formed at the other end of the protective cover 5. The tongue 51 protrudes beyond the outer contour of the fixed panel 4, facilitating the operator to turn the protective cover 5. When in use, after the protective cover 5 is flipped, the protective cover 5 is in an open state, thus facilitating the plugging of the male plug 1 and the plugging end of the female plug 2, which is convenient to use.

[0057] Refer 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 both sides of the fixed panel 4, reducing the possibility of displacement between the fixed panel 4 and the female plug 2 and ensuring the fixing effect of the fixed panel 4.

[0058] Refer to Figure 1 , Figure 2 and Figure 5, the limiting part 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 adapted to 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 detachable connection. When assembling the fixed panel 4, after passing the female plug 2 through the through hole 41, the fixed panel 4 is fixed between the limiting part 22 and the limiting ring 23 through the limiting ring 23, thereby realizing the assembly of the fixed panel 4. The assembly structure is simple and convenient for the assembly of the fixed panel 4 and the protective cover 5.

[0059] The implementation principle of a multi-fitting anti-backflow quick-connect plug in an embodiment of the present application is as follows: When using this device, by setting a common terminal 31, a normally open contact 32, and a normally closed contact 33 on the auxiliary operating member 3, it is convenient for the auxiliary operating member 3 to form a single-pole double-throw switch with an external operating rod or operating button. By installing this auxiliary operating member 3 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 there is a mains power failure, it can be quickly switched to the emergency power supply to ensure that 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 terminal 31, and at the same time, 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 conducted simultaneously, thereby avoiding the risk of reverse current generated when the emergency power supply is connected to the power grid and ensuring power supply safety.

[0060] Refer to Figure 6 , Figure 7 and Figure 10 , the isolation mechanism includes a spring plate cover 37 on the side wall of the auxiliary operating member 3. The spring plate cover 37 covers the common terminal 31, the normally open contact 32, and the normally closed contact 33. 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. When the common terminal 31 and the normally open contact 32 are docked, 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 docked, the first isolation plate 35 is inserted into the gap between the common terminal 31 and the normally open contact 32 to prevent too close proximity between the electrodes from generating an arc.

[0061] Refer to Figure 6 , Figure 7, the escape mechanism includes a fixing ring 61 and a heat-melting ring 63 on the outer side wall of the male plug 1. The heat-melting ring 63 fits against the insertion hole port of the female plug 2. An annular array of energy storage elastic pieces 62 is provided on the side wall of the fixing ring 61, and the other end of the energy storage elastic piece 62 abuts against the side wall of the heat-melting ring 63. A wrapping mechanism is arranged outside the energy storage elastic piece 62. When the connection between the male plug 1 and the female plug 2 overheats, the heat-melting ring 63 at the insertion hole port where the male plug 1 fits will soften and melt. At this time, the energy storage elastic piece 62 will release potential energy to eject the male plug 1, thereby mechanically disconnecting the charging connection to ensure the safety of power use.

[0062] Refer to Figure 6 , Figure 7 , the wrapping mechanism includes a wrapping bag 6 outside the energy storage elastic piece 62. The wrapping bag 6 wraps all the energy storage elastic pieces 62 to prevent the energy storage elastic pieces 62 from scratching people.

[0063] Refer to Figure 11 , Figure 12 , the assembling mechanism includes an assembling cylinder 7 and a fixing cylinder 9. The fixing cylinder 9 is made of heat-melting plastic. The fixing cylinder 9 is heat-melted in the shallow groove of the wall. The assembling cylinder 7 is installed at the tail of the female plug 2. Hook lines 91 are provided on the inner side wall of the fixing cylinder 9. Expansion grooves are arranged in an annular array on the outer side wall of the assembling cylinder 7. Expansion blocks 71 are movably arranged inside the expansion grooves. Docking teeth 72 matching the hook lines 91 are provided on the outer side wall of the expansion blocks 71. The expansion blocks 71 are fixed to the inner side wall of the assembling cylinder 7 by elastic blocks 73. An expansion power mechanism is arranged at the middle position of the expansion blocks 71. During the assembling of the female plug, the fixing cylinder 9 is heated and melted into the wall opening. At this time, the assembling cylinder 7 is aligned with the fixing cylinder 9 and inserted. All the expansion blocks 71 are pushed outwards until the docking teeth 72 on the outer side wall of all the expansion blocks 71 lock the hook lines 91, realizing the function of convenient disassembly.

[0064] Refer to Figure 11 , Figure 12 , the expansion power mechanism includes a pressure ring 74. A slope surface is provided on the inner side wall of the expansion block 71. The pressure ring 74 fits against the slope surface of the expansion block 71 and is connected to a pressure mechanism. When the pressure ring 74 is pushed inwards and abuts against the slope surface, all the expansion blocks 71 are pushed outwards.

[0065] Refer to Figure 12, the pressure mechanism includes two shaft holes on the pressure ring 74, and a pressure screw 75 is rotatably arranged inside the two shaft 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, and 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 penetrate through the middle of the nut 76 and apply an inward pressure to the pressure ring 74.

[0066] Refer to Figure 8 、 Figure 9 , the replaceable core includes an inner plug-in liner 8 inside the insertion hole. Expansion slots 81 are arranged on the side wall of the plug-in liner 8. Six built-in elastic pieces 82 are arranged in an annular array on the inner side wall of the plug-in liner 8. Clamping grooves 83 are arranged on two of the built-in elastic pieces 82 with the expansion slot 81 as the symmetry center. A docking plug bridge 84 is arranged on the outer side wall of the plug-in liner 8, and a docking plug piece 85 is inserted inside the docking plug bridge 84. The docking plug piece 85 is connected to the common terminal 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 insertion hole, the docking plug bridge 84 and the docking plug piece 85 are combined, achieving the effect of convenient replacement of the contact core. Compared with the plugging and unplugging structure of the prior art, the contact core will be deformed and cause poor contact during long-term plugging and unplugging.

[0067] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this 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; 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-melted 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 circular 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). 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; the pressure mechanism comprises two axial holes on the 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).

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 the 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 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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