阅读说明：本技术 一种用于新能源汽车的电缆快速插头 (A quick plug of cable for new energy automobile ) 是由 陈云 于 2020-11-02 设计创作，主要内容包括：本发明涉及新能源汽车技术领域,且公开了一种用于新能源汽车的电缆快速插头,包括插头外壳,插头外壳的正面开设有插槽,插槽中设有插头内壳,插头内壳的侧表面转动连接有定位环套,插头外壳插接的一端设有第一圆形通道；第一圆形通道与第二圆形通道连通,第一圆形通道的直径第一圆形通道的直径；第二圆形通道内设有压缩弹簧和小球；压缩弹簧和小球之间设有熔断丝；本发明提供了一种用于新能源汽车的电缆快速插头,可根据线缆插头处的温度,能进行自动调控散热方式,温度过高时,熔断丝熔断,可向远程监控人员报警,精准提醒某插头出现高温,防止出现火灾。(The invention relates to the technical field of new energy automobiles, and discloses a cable quick plug for a new energy automobile, which comprises a plug outer shell, wherein a slot is formed in the front surface of the plug outer shell, a plug inner shell is arranged in the slot, a positioning ring sleeve is rotatably connected to the side surface of the plug inner shell, and a first circular channel is formed in one plugging end of the plug outer shell; the first circular channel is communicated with the second circular channel, and the diameter of the first circular channel is equal to that of the first circular channel; a compression spring and a small ball are arranged in the second circular channel; a fuse wire is arranged between the compression spring and the small ball; the invention provides a cable quick plug for a new energy automobile, which can automatically regulate and control a heat dissipation mode according to the temperature at the cable plug, and when the temperature is too high, a fuse wire is fused, so that an alarm can be given to a remote monitoring person, a certain plug is accurately reminded of high temperature, and a fire disaster is prevented.)

1. The utility model provides a quick plug of cable for new energy automobile, includes plug shell (1), its characterized in that: the front surface of the plug outer shell (1) is provided with a slot (3), the slot (3) is internally provided with a plug inner shell (2), a first outer limiting groove (4) is arranged on the inner wall of one side of the slot (3), a positioning groove (16) is arranged on the inner wall of one side of the slot (3), the inner walls of the left side and the right side of the first outer limiting groove (4) are both provided with a first sliding groove (5), a first sliding rod (6) is arranged inside the first sliding groove (5), a first clamping rod (8) is connected inside the first outer limiting groove (4) in a sliding manner, the left side and the right side of the first clamping rod (8) are both fixedly connected with a first sliding block (9), a first spring (7) is arranged in the first sliding groove (5), a first extending groove (27) is arranged on the inner wall of the front side of the first outer limiting groove (4), the front side of the first extension groove (27) is communicated with the front surface of the plug shell (1);

a second outer limiting groove (10) is formed in the inner side wall of the slot (3), second sliding grooves (11) are formed in the inner walls of the left side and the right side of the second outer limiting groove (10), a second sliding rod (12) is arranged inside the second sliding groove (11), a second clamping rod (14) is connected inside the second outer limiting groove (10) in a sliding mode, second sliding blocks (15) are fixedly connected to the left side and the right side of the second clamping rod (14), a second spring (13) is arranged inside the second sliding groove (11), a second extending groove (29) is formed in the inner wall of the front side of the second outer limiting groove (10), the front side of the second extending groove (29) is communicated with the front side of the plug outer shell (1), a penetrating groove (17) is formed in the front side of the plug outer shell (1), inner ring threads (24) are formed in the inner side wall of the slot (3), and outer ring threads (26) are formed in the side surface of the plug inner shell (2), a positioning ring sleeve (18) is rotatably connected to the side surface of the plug inner shell (2), a positioning block (19) is fixedly connected to the side surface of the positioning ring sleeve (18), the positioning ring sleeve (18) is movably inserted into the slot (3), the positioning block (19) is movably inserted into the positioning groove (16), a first round hole (25) is formed in the positioning ring sleeve (18), a second screw hole (22) is formed in the top of the plug inner shell (2), a locking rod (23) is arranged in the second screw hole (22), and the locking rod (23) is a hollow locking rod; a first inner limiting groove (20) is formed in the side surface of the plug inner shell (2), the first clamping rod (8) is movably inserted into the first inner limiting groove (20), a second inner limiting groove (21) is formed in the side surface of the plug inner shell (2), and the second clamping rod (14) is movably inserted into the second inner limiting groove (21);

a first circular channel (35) is arranged on the inner wall of the side of the plug inner shell (2), a third screw hole (38) is formed in the top of the plug inner shell (2), when the outer ring thread (26) and the inner ring thread (24) are in thread butt joint, the third screw hole (38) is communicated with the first round hole (25), the first circular channel (35) is communicated with the second circular channel (31), and the second circular channel (31) is communicated with the third screw hole (38); the diameter of the first circular channel (35) is smaller than that of the second circular channel (31); a compression spring (32) and a small ball (34) are arranged in the second circular channel (31); a fuse wire (33) is arranged between the compression spring (32) and the small ball (34); one end of the fuse wire (33) is fixedly connected with the compression spring (32); the other end of the fuse wire (33) is fixedly connected with the small ball (34); one end of the compression spring (32) is fixedly connected with one end of the second circular channel (31); the other end of the compression spring (32) is fixedly connected with the small ball (34);

the second circular channel (31) is communicated with a third screw hole (38); one end of the second circular channel (31) far away from the small ball (34) is provided with a circular blocking cover (37); one end of the circular plug cover (37) is fixedly connected with the alarm switch (36); the second circular channel (31) and the circular plug cover (37) are matched with each other to form a seal.

2. The cable quick plug for the new energy automobile according to claim 1, characterized in that: the fuse wire (33) is expanded by heating; the tensile force applied to the compression spring (32) is reduced, the compression spring (32) is extended, and the compression spring (32) pushes the small ball (34) to move towards the direction close to the alarm switch (36); after the small ball (34) passes through the third screw hole (38), the second circular channel (31), the first circular channel (35), the third screw hole (38), the hollow lock rod (23) are communicated with the outside, and heat inside the plug exchanges heat with the external environment; when the temperature in the plug is reduced, the fuse wire contracts, the compression spring (32) drives the small ball (34) to move towards the direction close to the first circular channel (35), and after the small ball (34) passes through the third screw hole (38), the first circular channel (35), the second circular channel (31) and the third screw hole (38) are not communicated.

3. The cable quick plug for the new energy automobile according to claims 1 and 2, characterized in that: fuse (33) are heated the fusing, and compression spring (32) promote pellet (34) this moment and move to the direction that is close to alarm switch (36), alarm switch (36) on pellet (34) striking circular blanking cover (37), alarm switch (36) open, send the too high alarm of temperature to the remote control platform simultaneously.

4. The cable quick plug for the new energy automobile according to claim 1, characterized in that: the second outer limiting groove (10) and the first outer limiting groove (4) are the same in specification, and the second outer limiting groove (10) and the first outer limiting groove (4) are symmetrically distributed around the circle center of the plug shell (1).

5. The cable quick plug for the new energy automobile according to claim 1, characterized in that: the front face of the first clamping rod (8) is fixedly connected with a first pushing block (28), the first pushing block (28) extends out of the first outer limiting groove (4) through the first extending groove (27), and the first pushing block (28) is connected with the first extending groove (27) in a sliding mode.

6. The cable quick plug for the new energy automobile according to claim 1, characterized in that: the front surface of the second clamping rod (14) is fixedly connected with a second pushing block (30), the second pushing block (30) extends out of the second outer limiting groove (10) through a second extending groove (29), and the second pushing block (30) is connected with the second extending groove (29) in a sliding mode.

7. The cable quick plug for the new energy automobile according to claim 1, characterized in that: the outer ring threads (26) are matched with the inner ring threads (24), and the length of the outer ring threads (26) is the same as that of the inner ring threads (24).

8. The cable quick plug for the new energy automobile according to claim 1, characterized in that: the second screw hole (22) is matched with the first round hole (25), the lock rod (23) is in threaded connection with the second screw hole (22), the lock rod (23) is in nested connection with the first round hole (25), and the outer diameter of the lock rod (23) is smaller than the width of the through groove (17).

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a cable quick plug for a new energy automobile.

Background

Electric automobile has been used by more and more people as new energy automobile's representative, consequently, the construction of various charging stations is also in going on like a fire, the construction of charging station involves laying of cable, after the cable is laid, in order to make it become a continuous circuit, need pass through the plug connection between each section cable, current cable plug possesses the function of inserting soon, connection efficiency has been improved to a certain extent, however, new energy automobile charges and can produce a large amount of heats, because plug department belongs to sealing connection, the radiating effect is poor, cause the conflagration easily.

Disclosure of Invention

The invention provides a connector for a new energy automobile, which aims to solve the technical problems of the prior art.

The invention provides the following technical scheme: a quick cable plug for a new energy automobile comprises a plug outer shell, wherein a slot is formed in the front face of the plug outer shell, a plug inner shell is arranged in the slot, a first outer limiting groove is formed in the inner wall of one side of the slot, a positioning groove is formed in the inner wall of one side of the slot, first sliding grooves are formed in the inner walls of the left side and the right side of the first outer limiting groove, a first sliding rod is arranged inside the first sliding groove, a first clamping rod is connected inside the first outer limiting groove in a sliding mode, first sliding blocks are fixedly connected to the left side and the right side of the first clamping rod, a first spring is arranged inside the first sliding groove, a first extending groove is formed in the inner wall of the front side of the first outer limiting groove, and the front side of the first extending groove is communicated with the front face of the plug outer shell;

a second outer limiting groove is formed in the inner side wall of the inserting groove, second sliding grooves are formed in the inner walls of the left side and the right side of the second outer limiting groove, a second sliding rod is arranged in each second sliding groove, a second clamping rod is connected to the inner portion of the second outer limiting groove in a sliding mode, second sliding blocks are fixedly connected to the left side and the right side of the second clamping rod, a second spring is arranged in each second sliding groove, a second extending groove is formed in the inner wall of the front side of each second outer limiting groove, the front side of each second extending groove is communicated with the front side of the plug outer shell, a through groove is formed in the front side of the plug outer shell, inner ring threads are formed in the inner side wall of the inserting groove, outer ring threads are formed in the side surface of the plug inner shell, a positioning ring sleeve is rotatably connected to the side surface of the plug inner shell, a positioning block is fixedly connected to, the positioning block is movably inserted into the positioning groove, a first round hole is formed in the positioning ring sleeve, a second screw hole is formed in the top of the plug inner shell, a locking rod is arranged in the second screw hole, and the locking rod is a hollow locking rod; a first inner limiting groove is formed in the side surface of the plug inner shell, the first clamping rod is movably inserted into the first inner limiting groove, a second inner limiting groove is formed in the side surface of the plug inner shell, and the second clamping rod is movably inserted into the second inner limiting groove;

the plug comprises a plug inner shell, a plug outer shell, a plug inner shell and a plug outer shell, wherein the side inner wall of the plug inner shell is provided with a first circular channel, the top of the plug inner shell is provided with a third screw hole, when the outer ring threads and the inner ring threads are in threaded butt joint, the third screw hole is communicated with a first circular hole, the first circular channel is communicated with a second circular channel, and the second circular channel is communicated with the third screw; the diameter of the first circular channel is smaller than that of the second circular channel; a compression spring and a small ball are arranged in the second circular channel; a fuse wire is arranged between the compression spring and the small ball; one end of the fuse wire is fixedly connected with the compression spring; the other end of the fuse wire is fixedly connected with the small ball; one end of the compression spring is fixedly connected with one end of the second circular channel; the other end of the compression spring is fixedly connected with the small ball;

the second circular channel is communicated with the third screw hole; one end of the second circular channel, which is far away from the small ball, is provided with a circular plug; one end of the circular plug cover is fixedly connected with the alarm switch; the second circular channel and the circular plug cover are matched with each other to form sealing.

As a further scheme, the fuse wire is expanded by heating; the tension applied to the compression spring is reduced, the compression spring extends, and the compression spring pushes the small ball to move towards the direction close to the alarm switch; after the small ball passes through the third screw hole, the second circular channel, the first circular channel, the third screw hole, the hollow lock rod are communicated with the outside, and heat inside the plug exchanges heat with the external environment; when the temperature in the plug is reduced, the fuse wire contracts, the compression spring drives the small ball to move towards the direction close to the first circular channel, and after the small ball passes through the third screw hole, the first circular channel, the second circular channel and the third screw hole are not communicated;

as a further scheme, the fuse wire is heated and fused, at the moment, the compression spring pushes the small ball to move towards the direction close to the alarm switch, the small ball impacts the alarm switch on the circular plug cover, the alarm switch is turned on, and meanwhile, an overhigh temperature alarm is sent to the remote control console.

As a further scheme, the second outer limiting groove and the first outer limiting groove have the same specification, and the second outer limiting groove and the first outer limiting groove are symmetrically distributed around the center of the plug housing.

As a further scheme, a first pushing block is fixedly connected to the front side of the first clamping rod, a first outer limiting groove extends from the first extending groove of the first pushing block, and the first pushing block is connected with the first extending groove in a sliding mode.

As a further scheme, a second pushing block is fixedly connected to the front surface of the second clamping rod, the second pushing block extends out of the second outer limiting groove from the second extending groove, and the second pushing block is connected with the second extending groove in a sliding mode.

As a further scheme, the outer ring thread is matched with the inner ring thread, and the length of the outer ring thread is the same as that of the inner ring thread.

As a further scheme, the second screw hole is matched with the first round hole, the lock rod is in threaded connection with the second screw hole, the lock rod is in nested connection with the first round hole, and the outer diameter of the lock rod is smaller than the width of the through groove.

The invention has at least the following beneficial effects:

1. the invention aligns a lock rod to a through groove under the mutual matching of a first clamping rod, a second clamping rod, a first spring, a second spring, a first inner limiting groove, a second inner limiting groove, a positioning ring sleeve, a positioning block, a positioning groove, inner ring threads and outer ring threads, aligns the positioning block to the positioning groove, inserts a plug inner shell into a slot, pushes the first clamping rod and the second clamping rod to move towards the direction far away from the plug inner shell through a first push block and a second push block, compresses the first spring and the second spring to enable the plug inner shell to completely enter the slot, enables the outer ring threads to be in contact with the inner ring threads at the moment, rotates the lock rod to enable the lock rod to move out of a second screw hole, rotates the plug inner shell relative to the positioning ring sleeve, and rebounds the first spring and the second spring when the first inner limiting groove is aligned with the first outer limiting groove and the second inner limiting groove is aligned with the second outer limiting groove, during first kelly got into first interior spacing groove, during the spacing groove in the second got into, and outer lane screw thread precession inner circle screw thread, accomplish fixedly, make more firm of plug butt joint through screw thread fastening connection, prevent that the plug from taking place not hard up, also prevent plug and socket from being pulled open, avoid the contact failure because of vibrations arouse simultaneously.

2. The invention is characterized in that a hollow lock rod, a third screw hole, a compression spring, a fuse wire, a small ball, a first circular channel, a circular plug cover and a second circular channel are matched with each other; when the heat generated at the splicing part is excessive, the fuse wire is heated and extended; the tension applied to the compression spring is reduced, the compression spring is extended, and the compression spring pushes the small ball to move towards the direction close to the alarm switch; after the ball passes through the third screw hole, the first circular channel, the second circular channel, the third screw hole, the hollow lock rod are communicated with the outside, and the heat inside the plug is exchanged with the external environment; the internal temperature of the plug is reduced; when the interior of the plug is lowered, the fuse wire is contracted, so that the compression spring is contracted, the compression spring drives the small ball to move towards the direction close to the first circular channel, and after the small ball passes through the third screw hole, the second circular channel is not communicated with the third screw hole, so that the interior of the plug becomes a closed environment; when radiating, the heat pipe is opened with an external channel to radiate heat; after the heat dissipation is finished, the channel is closed, the interior of the plug becomes a closed environment, external damp gas or sundries are prevented from invading, the situation that the plug is short-circuited due to the fact that the damp gas or the sundries enter the plug is avoided, and therefore the service life of the plug is prolonged.

3. According to the invention, under the mutual cooperation of the fuse wire, the small ball, the alarm switch and the circular blanking cover, when the fuse wire is heated, the compression spring pushes the small ball to continuously move towards the direction close to the alarm switch until the temperature in the plug is too high and the fuse wire is fused, at the moment, the compression spring pushes the small ball to move towards the direction close to the alarm switch, the small ball impacts the alarm switch on the circular blanking cover, the alarm switch is turned on, meanwhile, an over-high temperature alarm is sent to a remote control console, when the temperature is too high, an alarm can be given to a remote monitoring person, a certain plug is accurately reminded of high temperature, the remote control center carries out treatment in time, and the condition of fire caused by the over-high temperature is avoided.

Drawings

Fig. 1 is a schematic structural view of the inner housing of the plug of the present invention after installation;

FIG. 2 is a front view of the plug housing of the present invention;

FIG. 3 is a three-dimensional rear view of the inner housing of the plug of the present invention;

FIG. 4 is a front view of the plug housing of the present invention;

FIG. 5 is a front view of the inner housing of the plug of the present invention;

FIG. 6 is a side view of the inner housing of the plug of the present invention;

FIG. 7 is a cross-sectional view of a front view of the present invention;

fig. 8 is a cross-sectional side view of the inner housing of the plug of the present invention.

In the figure: 1. a plug housing; 2. a plug inner housing; 3. a slot; 4. a first outer limiting groove; 5. a first chute; 6. a first slide bar; 7. a first spring; 8. a first clamping rod; 9. a first slider; 10. a second outer limiting groove; 11. a second chute; 12. a second slide bar; 13. a second spring; 14. a second clamping rod; 15. a second slider; 16. positioning a groove; 17. a through groove; 18. a positioning ring sleeve; 19. positioning blocks; 20. a first inner limiting groove; 21. a second inner limiting groove; 22. a second screw hole; 23. a lock lever; 24. inner ring threads; 25. a first circular hole; 26. outer ring threads; 27. a first extension groove; 28. a first pusher; 29. a second extension groove; 30. a second push block; 31. a second circular channel; 32. a compression spring; 33. fusing the wires; 34. a pellet; 35. a first circular channel; 36. an alarm switch; 37. a circular plug cover; 38. and a third screw hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the invention provides a cable quick plug for a new energy automobile, which includes a plug outer shell 1, a slot 3 is formed in the front side of the plug outer shell 1, a plug inner shell 2 is arranged in the slot 3, a first outer limiting groove 4 is formed in an inner wall of one side of the slot 3, a positioning groove 16 is formed in an inner wall of one side of the slot 3, first sliding grooves 5 are formed in inner walls of left and right sides of the first outer limiting groove 4, a first sliding rod 6 is arranged inside the first sliding groove 5, a first clamping rod 8 is slidably connected inside the first outer limiting groove 4, first sliding blocks 9 are fixedly connected to left and right sides of the first clamping rod 8, a first spring 7 is arranged inside the first sliding groove 5, a first extending groove 27 is formed in an inner wall of a front side of the first outer limiting groove 4, and the front side of the first extending groove 27 is communicated with the front side of the plug outer shell 1.

The inner wall of the side of the slot 3 is provided with a second outer limit groove 10, the inner walls of the left side and the right side of the second outer limit groove 10 are provided with second sliding grooves 11, the inside of the second sliding grooves 11 is provided with a second sliding rod 12, the inside of the second outer limit groove 10 is connected with a second clamping rod 14 in a sliding mode, the left side and the right side of the second clamping rod 14 are fixedly connected with second sliding blocks 15, the inside of the second sliding grooves 11 is provided with a second spring 13, the inner wall of the front side of the second outer limit groove 10 is provided with a second extending groove 29, the front side of the second extending groove 29 is communicated with the front side of the plug outer shell 1, the front side of the plug outer shell 1 is provided with a through groove 17, the inner wall of the side of the slot 3 is provided with inner ring threads 24, the side surface of the plug inner shell 2 is provided with outer ring threads 26.

The side surface of the plug inner shell 2 is rotatably connected with a positioning ring sleeve 18, a positioning block 19 is fixedly connected with the side surface of the positioning ring sleeve 18, the positioning ring sleeve 18 is movably inserted into the slot 3, the positioning block 19 is movably inserted into the positioning groove 16, a first round hole 25 is formed in the positioning ring sleeve 18, a second screw hole 22 is formed in the top of the plug inner shell 2, a locking rod 23 is arranged in the second screw hole 22, the second screw hole 22 is matched with the first round hole 25, the locking rod 23 is in threaded connection with the second screw hole 22, the locking rod 23 is in nested connection with the first round hole 25, and the outer diameter of the locking rod 23 is smaller than the width of.

The lock lever 23 is a hollow lock lever; the locking bar 23 thus serves to limit the position ring 18 and prevent relative rotation between the position ring 18 and the plug inner housing 2 during normal operation and during insertion of the plug inner housing 2 into the socket 3. The side surface of the plug inner shell 2 is provided with a first inner limiting groove 20, the first clamping rod 8 is movably inserted into the first inner limiting groove 20, the side surface of the plug inner shell 2 is provided with a second inner limiting groove 21, and the second clamping rod 14 is movably inserted into the second inner limiting groove 21.

The inner side wall of the plug inner shell 2 is provided with a first circular channel 35, the top of the plug inner shell 2 is provided with a third screw hole 38, when the outer ring thread 26 and the inner ring thread 24 complete thread butt joint, the third screw hole 38 is communicated with the first circular hole 25, the first circular channel 35 is communicated with the second circular channel 31, and the second circular channel 31 is communicated with the third screw hole 38; the diameter of the first circular channel 35 is smaller than the diameter of the second circular channel 31; a compression spring 32 and a small ball 34 are arranged in the second circular channel 31; a fuse 33 is arranged between the compression spring 32 and the small ball 34; one end of the fuse 33 is fixedly connected with the compression spring 32; the other end of the fuse wire 33 is fixedly connected with the small ball 34; one end of the compression spring 32 is fixedly connected with one end of the second circular channel 31; the other end of the compression spring 32 is fixedly connected with the ball 34.

The second circular channel 31 communicates with the third screw hole 38; one end of the second circular channel 31 far away from the small ball 34 is provided with a circular blocking cover 37; one end of the circular plug cover 37 is fixedly connected with the alarm switch 36; the second circular channel 31 cooperates with the circular cap 37 to form a seal.

The fuse 33 is thermally expanded; the tension applied to the compression spring 32 is reduced, the compression spring 32 is extended, and the compression spring 32 pushes the small ball 34 to move towards the direction close to the alarm switch 36; after the ball 34 passes through the third screw hole 38, the second circular channel 31, the first circular channel 35, the third screw hole 38, the hollow lock rod 23 and the outside are communicated, and the heat inside the plug exchanges heat with the external environment; when the temperature in the plug is reduced, the fuse wire contracts, the compression spring 32 drives the small ball 34 to move towards the direction close to the first circular channel 35, and after the small ball 34 passes through the third screw hole 38, the first circular channel 35, the second circular channel 31 and the third screw hole 38 are not communicated.

The fuse 33 continues to be heated, the compression spring 32 pushes the small ball 34 to continue to move towards the direction close to the alarm switch 36 until the fuse 33 is fused, at the moment, the compression spring 32 pushes the small ball 34 to move towards the direction close to the alarm switch 36, the small ball 34 impacts the alarm switch 36 on the circular blocking cover 37, the alarm switch 36 is turned on, meanwhile, an over-temperature alarm is sent to the remote control console, and after the small ball 34 impacts the alarm switch 36.

The second outer limiting groove 10 and the first outer limiting groove 4 have the same specification, and the second outer limiting groove 10 and the first outer limiting groove 4 are symmetrically distributed around the center of the plug housing 1.

The front surface of the first clamping rod 8 is fixedly connected with a first push block 28, the first push block 28 extends out of the first outer limiting groove 4 from the first extending groove 27, the first push block 28 is connected with the first extending groove 27 in a sliding mode, and the first push block 28 is convenient for people to move the first clamping rod 8; the front surface of the second clamping rod 14 is fixedly connected with a second pushing block 30, the second pushing block 30 extends out of the second outer limiting groove 10 through a second extending groove 29, and the second pushing block 30 is connected with the second extending groove 29 in a sliding mode. The second push block 30 facilitates the person to move the second catch lever 14.

When the plug inner shell 2 is not installed, the first round hole 25 corresponds to the second screw hole 22, the through groove 17, the first round hole 25 and the second screw hole 22 are located on the same vertical line, the lock rod 23 is arranged in the second screw hole 22, the first inner limiting groove 20 is formed in the side surface of the plug inner shell 2, the first clamping rod 8 is movably inserted into the first inner limiting groove 20, the second inner limiting groove 21 is formed in the side surface of the plug inner shell 2, the second clamping rod 14 is movably inserted into the second inner limiting groove 21, because the positioning ring sleeve 18 and the plug inner shell 2 can rotate relatively, the locking rod 23 limits the positioning ring sleeve 18, and the positioning ring sleeve 18 and the plug inner shell 2 are prevented from rotating relatively in the process that the plug inner shell 2 is inserted into the slot 3 at ordinary times, so that the first inner limiting groove 20 and the second inner limiting groove 21 are always kept at the initial positions.

In use, the lock rod 23 is aligned with the through groove 17, the positioning block 19 is aligned with the positioning groove 16, the plug inner shell 2 is inserted into the slot 3, the first clamping rod 8 and the second clamping rod 14 are pushed to move towards the direction far away from the plug inner shell 2 through the first pushing block 28 and the second pushing block 30, the first spring 7 and the second spring 13 are compressed, the plug inner shell 2 completely enters the slot 3, the outer ring thread 26 is contacted with the inner ring thread 24, the lock rod 23 is rotated out of the second screw hole 22, the plug inner shell 2 is rotated, when the first inner limiting groove 20 is aligned with the first outer limiting groove 4 and the second inner limiting groove 21 is aligned with the second outer limiting groove 10, the first spring 7 and the second spring 13 rebound, the first clamping rod 8 enters the first inner limiting groove 20, the second clamping rod 14 enters the second inner limiting groove 21, and the outer ring thread 26 is screwed into the inner ring thread 24, so as to complete thread fixation, make more firm that the plug docks through screw thread fastening connection, prevent that the plug from taking place not hard up, also prevent plug socket by the pulling open, avoid because of the contact failure that vibrations arouse. In the process of rotationally screwing the outer ring thread 26 and the inner ring thread 24, the plug inner shell 2 slides with the positioning ring sleeve 18, the plug inner shell 2 moves towards one side close to the inner ring thread 24, when the outer ring thread 26 and the inner ring thread 24 are fixed, the first round hole 25 on the positioning ring sleeve 18 is communicated with the third screw hole 38, the locking rod 23 is screwed into the third screw hole 38, and the hollow channel of the locking rod 23 is communicated with the third screw hole 38 and the second circular channel 31.

When heat is generated at the splicing part, the fuse wire 33 is heated and extended; the tension applied to the compression spring 32 is reduced, the compression spring 32 is extended, and the compression spring 32 pushes the small ball 34 to move towards the direction close to the alarm switch 36; after the ball 34 passes through the third screw hole 38, the second circular channel 31, the first circular channel 35, the third screw hole 38 and the hollow channel of the lock rod 23 are communicated with the outside, and the heat inside the plug is exchanged with the external environment; the temperature in the plug is reduced, the fuse wire shrinks after the temperature is reduced, the compression spring 32 shrinks, the compression spring 32 drives the small ball 34 to move towards the direction close to the first circular channel 35, and after the small ball 34 passes through the third screw hole 38, the first circular channel 35, the second circular channel 31 and the third screw hole 38 are not communicated, so that the inside of the plug becomes a closed environment; when radiating, the heat pipe is opened with an external channel to radiate heat; after the heat dissipation is completed, the channel is closed, the inside of the plug becomes a closed environment, the invasion of external humid gas is prevented, the situation that the plug is short-circuited due to the invasion of the humid gas is avoided, and therefore the service life of the plug is prolonged.

When a short circuit or overhigh temperature occurs at the splicing part, the fuse wire 33 is fused due to high temperature because of excessive heat generation, the compression spring 32 pushes the small ball 34 to move towards the direction close to the alarm switch 36, the small ball 34 impacts the alarm switch 36 on the circular blocking cover 37, the alarm switch 36 is turned on, meanwhile, an overhigh temperature alarm is sent to a remote control console, and after the small ball 34 impacts the alarm switch 36. Alarm switch reports to the police to remote monitoring personnel, and remote monitoring personnel obtain reporting to the police, can accurately judge that high temperature appears in certain plug, and remote control center in time handles, has avoided the condition because of the short circuit causes the conflagration.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.