CN115706354A - Connector and drawer cabinet circuit distribution switching device - Google Patents

Abstract

The utility model provides a plug connector and drawer cabinet circuit distribution switching device, the plug connector includes the elasticity supporting piece that a plurality of intervals set up, and a plurality of elasticity supporting pieces become the circumference and arrange around forming the grafting cavity, and the entry one end of grafting cavity is equipped with the circular shape centre gripping jack that a plurality of elasticity supporting pieces enclose, the diameter of centre gripping jack is less than the diameter of grafting cavity for the contact pin can 360 follow arbitrary angle and insert, even certain error appears when two plug connectors of grafting complex are installed, no matter whether there is the deviation in level or vertical direction and can all adjust the alignment. The circuit distribution switching device of the drawer cabinet comprises the plug connector, which is beneficial to reducing the space occupation.

Description

Connector and drawer cabinet circuit distribution switching device

Technical Field

The invention relates to the field of switching appliances, in particular to a plug connector and drawer cabinet circuit distribution switching device.

Background

The conventional circuit distribution switching device of the drawer cabinet generally comprises a movable plug-in unit, a static plug-in unit and a junction box, wherein the static plug-in unit is arranged in the junction box, the movable plug-in unit is arranged on a drawer, the drawer cabinet can drive the movable plug-in unit to be in plug-in fit with the static plug-in unit, the movable plug-in unit is powered on when being plugged in the static plug-in unit, and the movable plug-in unit is powered off when being separated from the static plug-in unit.

The static plug-in units of the existing circuit distribution switching device of the drawer cabinet are of two types, one type is a copper bus static socket, the copper bus static socket corresponds to a movable plug-in unit with a spring chuck on a drawer, and the other type is a static socket with a spring chuck, and corresponds to a movable plug-in unit with a copper bus. Because the assembly precision and the processing precision are limited, the static socket and the movable plug-in cannot be precisely aligned before being plugged, in order to ensure that the static socket and the movable plug-in can be smoothly aligned and plugged, the movable plug-in and the static socket need to have certain adjustability, the two conventional static sockets have a very obvious defect, can only be adjusted left and right in the horizontal direction, cannot be adjusted in other directions, and have higher requirements on the processing precision and the mounting precision in order to ensure that the static socket and the movable plug-in can be aligned during plugging.

Meanwhile, according to the design requirements of electric appliances, the circuit distribution and switching device is provided with two types of three-phase or three-phase four-wire, correspondingly, the circuit distribution and switching device is internally provided with two types of wiring of A, B and C three-phase or A, B, C and N three-phase four-wire, the two types of wiring respectively adopt different bus boxes, the universality is poor, the cost is high, and the three-phase four-wire circuit distribution and switching device is required to be provided with a smaller-sized dead socket on the basis of meeting the safety requirements.

The current commonly used circuit distribution switching device has two types, namely a circuit distribution switching device with a plastic shell structure and a circuit distribution switching device with a metal shell structure, and the circuit distribution switching device with the plastic shell structure has high cost and large processing difficulty. The circuit distribution switching device for the 1/2 unit drawer with the metal structure has the advantages that the sufficient electric gap and insulation distance and the plugging depth are required to be guaranteed, the thickness size of the circuit distribution switching device is greatly increased compared with that of a plastic shell structure, so that the use depth space of the 1/2 unit drawer with the small space volume is reduced, and the adopted static socket needs to have a smaller size on the basis of guaranteeing the plugging depth.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a plug connector and a drawer cabinet circuit distribution switching device.

In order to achieve the purpose, the invention adopts the following technical scheme:

a plug connector comprises a plurality of elastic clamping pieces arranged at intervals, wherein the elastic clamping pieces are arranged in a circumferential mode and surround to form a plug cavity, a circular clamping jack surrounded by the elastic clamping pieces is arranged at one inlet end of the plug cavity, and the diameter of the clamping jack is smaller than that of the plug cavity.

Preferably, the clamping jack is further provided with a circular guide plug hole surrounded by a plurality of elastic clamping pieces at one end of the inlet of the plug cavity, and the diameter of the guide plug hole is larger than that of the clamping jack.

Preferably, still include the spring coil, the elasticity centre gripping piece outside corresponds the first interior concave part that forms the arc indent in the position that forms the centre gripping jack, and the first interior concave part intercommunication of a plurality of elasticity centre gripping pieces, spring coil cover are in the first interior concave part of a plurality of elasticity centre gripping pieces.

Preferably, the wire holder is connected with the elastic clamping piece, a second concave part which is concave in an arc shape is formed on the outer side of one end, connected with the wire holder, of the elastic clamping piece, and a third concave groove which is concave in an arc shape is formed in the end, connected with the elastic clamping piece, of the wire holder; the second concave part is matched with the third concave groove, and the second spring ring is sleeved in the second concave parts of the elastic clamping pieces to fix the elastic clamping pieces and the wire holder.

Preferably, the elastic clamping piece is arc-shaped in the radial direction of the plugging cavity, a first concave arc-shaped concave inner portion, a third convex arc-shaped concave outer wall and a second concave arc-shaped concave inner portion are sequentially formed on the outer side of the elastic clamping piece in the axial direction of the plugging cavity, and a first convex arc-shaped convex outer wall, a third concave arc-shaped concave inner portion and a second convex arc-shaped convex outer wall are sequentially formed on the inner side of the corresponding elastic clamping piece in the axial direction of the plugging cavity; the third inner concave parts of the elastic clamping sheets surround the inserting cavity body which forms a spherical structure, and the first arc-shaped outer convex walls of the elastic clamping sheets form the clamping insertion hole.

The invention also provides a circuit distribution switching device of the drawer cabinet, which comprises a static plug-in unit and a movable plug-in unit, wherein the static plug-in unit or the movable plug-in unit is the plug-in unit.

The invention also provides a circuit distribution switching device of the drawer cabinet, which comprises a movable plug-in unit, a static plug-in unit and a bus box, wherein the static plug-in unit is the plug-in unit, the bus box comprises a shell and a bus arranged in the shell, the static plug-in unit is arranged in the shell and connected with the bus, the movable plug-in unit is arranged on the drawer cabinet and corresponds to the static plug-in unit, the movable plug-in unit comprises a mounting seat and a plug pin arranged on the mounting seat, and the plug pin comprises a plug-in part in plug-in fit with the static plug-in unit.

Preferably, the device further comprises a shutter device arranged between the movable plug-in unit and the static plug-in unit, wherein the shutter device is provided with a channel communicated with the static plug-in unit and a shielding mechanism capable of closing and opening the channel; the drawer cabinet can drive the movable plug-in unit to move towards the static plug-in unit, so that the shielding mechanism of the movable valve device driven by the movable plug-in unit opens the channel to be in plug-in fit with the static plug-in unit.

Preferably, the shell of the bus box comprises a first limiting plate and a second limiting plate which are buckled with each other, the inner side of the second limiting plate is provided with a bus clamping groove for clamping a bus and a connection support seat for installing the static plug-in unit, the second limiting plate is provided with a second separation lug between adjacent buses, the first limiting plate is provided with a first separation lug corresponding to the second separation lug, the position of the first limiting plate corresponding to the connection support seat is provided with a valve mounting seat, the first separation lug corresponds to the second separation lug for isolating the adjacent buses, the static plug-in unit is installed in the connection support seat, one end of the static plug-in unit provided with a clamping jack penetrates out of the valve mounting seat, and the valve gun barrel is clamped with the valve mounting seat and covers the static plug-in unit.

Preferably, the bus in the bus box comprises an incoming bus and an outgoing bus, the incoming bus and the outgoing bus are arranged in parallel at intervals, two ends of the incoming bus are respectively connected with the static plug-in, the incoming bus is also connected with the main incoming plug-in, one end of the outgoing bus is connected with the static plug-in, and the other end of the outgoing bus is connected with the cable overlapping row; the position of the incoming bus corresponding to the main incoming plug-in connected with the adjacent bus is provided with an insulating sleeve, and/or the position of the outgoing bus corresponding to the adjacent bus connecting cable overlapping row is provided with an insulating sleeve, and the shell of the bus box is provided with a sealing piece corresponding to the N-phase valve mounting seat.

The plug connector comprises a cylindrical plug cavity surrounded by a plurality of elastic clamping sheets arranged at intervals, wherein a circular clamping jack surrounded by the plurality of elastic clamping sheets is arranged at one end of an inlet of the plug cavity, the diameter of the clamping jack is smaller than that of the plug cavity, a contact pin is inserted into the plug cavity from the clamping jack for plug fit, the clamping jack is opened during plug fit, and the inserted clamping jack clamps a plug part of a movable plug connector.

Preferably, the plug connector is a quincuncial static plug-in connector formed by three elastic clamping pieces, the three quincuncial elastic clamping pieces are good in heat dissipation effect, the three quincuncial elastic clamping pieces form an arc shape, the arc shape is in line contact with the contact pin all the time, and the friction resistance is small.

The invention also provides a drawer cabinet circuit distribution switching device, the plug connector is adopted as a static plug-in unit, the external dimension of the static plug-in unit is smaller than that of the existing static plug-in unit, the space occupation is favorably reduced, and the problems that the existing 125A circuit distribution switching device cannot realize a three-phase four-wire wiring mode under the existing specification and size condition and the thickness space of the existing metal shell drawer cabinet circuit distribution switching device is larger can be solved.

In addition, the valve device is automatically closed after the movable plug-in unit is separated from the static plug-in unit, so that the static plug-in unit is effectively protected, the installation protection capability of the circuit distribution switching device is improved, the electric shock risk is reduced, the circuit distribution switching device is effectively protected, and the IP40 protection grade can be achieved.

Drawings

Fig. 1 is a schematic view of an assembly structure of a drawer cabinet circuit distribution switching device and a power distribution cabinet according to a first embodiment;

FIG. 2 is an enlarged view of the portion A of FIG. 1;

fig. 3 is a schematic structural diagram of a movable plug-in of the circuit distribution adapter device of the drawer cabinet according to the first embodiment;

FIG. 4 is an exploded view of the movable insert of the first embodiment;

FIG. 5 is a cross-sectional view of the movable plug-in unit according to the first embodiment;

FIG. 6 is a schematic view of a second position-limiting base according to the first embodiment;

FIG. 7 is another exploded view of the movable insert of the first embodiment;

FIG. 8 is a schematic structural diagram of a static plug-in unit according to the first embodiment;

fig. 9 is a schematic structural view of the elastic holding pieces of the static plug-in unit according to the first embodiment;

fig. 10 is a schematic structural view of a wire holder of the static plug-in unit of the first embodiment;

fig. 11 is an exploded view of the shutter device according to the first embodiment;

FIG. 12 is a schematic view showing an opening structure of the shutter device according to the first embodiment;

FIG. 13 is a schematic view of a closed structure of the shutter device according to the first embodiment;

FIG. 14 is a schematic view showing a shutter structure of the shutter device according to the first embodiment;

fig. 15 is a schematic view of the structure of the shutter barrel of the shutter device according to the first embodiment;

FIG. 16 is a schematic view showing the entire structure of a bus bar box according to the first embodiment;

fig. 17 is an exploded view of the bus bar box according to the first embodiment;

FIG. 18 is an enlarged view of the portion B in FIG. 17;

fig. 19 is a schematic view of a first stopper plate structure of the junction box of the first embodiment;

fig. 20 is a schematic view of an insulating sheath structure of a bus bar box according to the first embodiment;

FIG. 21 is a schematic side view of the bus bar box according to the first embodiment;

FIG. 22 is a schematic view showing an angle of the movable insert according to the second embodiment;

FIG. 23 is a schematic view of another angle of the movable insert of the second embodiment;

FIG. 24 is a bottom view of the movable insert of the second embodiment of FIG. 22;

FIG. 25 is a schematic view showing an angle of the movable insert according to the third embodiment;

FIG. 26 is a structural view showing another angle of the movable insertion member according to the third embodiment;

fig. 27 is a bottom view of fig. 25 of the movable insert of the third embodiment.

FIG. 28 is a schematic structural view of a fourth embodiment of a static plug-in unit;

FIG. 29 is a schematic structural view of a fifth embodiment of a static plug-in unit;

FIG. 30 is a schematic structural view of a static plug-in unit according to the sixth embodiment;

fig. 31 is a schematic structural view of a shutter device of the seventh embodiment;

fig. 32 is an exploded view of the shutter device of the seventh embodiment;

FIG. 33 is a schematic view of the shutter device of the seventh embodiment showing its highlighted internal structure;

FIG. 34 is a schematic sectional view showing the elastic shutter of the shutter device according to the seventh embodiment;

fig. 35 is a schematic structural view of a bus box of the drawer cabinet electric circuit distribution changeover device of the seventh embodiment;

fig. 36 is a schematic structural view of a shutter mount on the bus box of the seventh embodiment.

Detailed Description

The following description will further describe a specific embodiment of the circuit distribution adapter device for a drawer cabinet according to the present invention with reference to the embodiments shown in the drawings. The present invention is not limited to the following embodiments.

In a first embodiment, as shown in fig. 1-2, a circuit distribution and switching device for a drawer cabinet includes a movable plug-in 1, a static plug-in 2, a bus box 3, and a shutter device 4, where the bus box 3 includes a housing and a bus disposed in the housing, the static plug-in 2 is disposed in the housing and connected to the bus, the movable plug-in 1 is mounted on a drawer of the drawer cabinet and disposed corresponding to the static plug-in 2, the shutter device 4 is disposed between the movable plug-in 1 and the static plug-in 2, the shutter device 4 is provided with a channel communicated with the static plug-in 2, and a shielding mechanism capable of closing and opening the channel, and when the shielding mechanism closes the channel, the shielding mechanism protects the static plug-in 2, the movable plug-in 1 is disposed on the drawer of the drawer cabinet and disposed corresponding to the static plug-in 2, the drawer can drive the movable plug-in 1 to move toward the static plug-in 2, the shielding mechanism of the shutter device 1 drives the shutter device 4 to open the channel, and the channel of the shutter device 4 passes through the static plug-in 2 to be in plug-in cooperation with a connection wire in the bus box 3, so that a bus element in the drawer cabinet can be electrically connected to the bus; the drawer can drive the movable plug-in unit 1 to move away from the static plug-in unit 2 so as to separate the movable plug-in unit 1 from the static plug-in unit 2 and lose power, and the shielding mechanism resets to close the channel at the moment.

The improved point of the circuit distribution switching device of the drawer cabinet is that the bus box 3 is provided with the valve device 4, the valve device 4 is arranged between the movable plug-in unit 1 and the static plug-in unit 2, and the valve device 4 is automatically closed after the movable plug-in unit 1 is separated from the static plug-in unit 2, so that the static plug-in unit 2 is effectively protected, the installation protection capability of the circuit distribution switching device is improved, the electric shock risk is reduced, the circuit separation switching device is effectively protected, and the protection grade of IP40 can be reached.

As shown in fig. 2, the movable plug-in unit 1 of the present embodiment includes a pin, the stationary plug-in unit 2 includes a holding socket 28, and the pin of the movable plug-in unit 1 is inserted into the holding socket 28 of the stationary plug-in unit 2 for inserting and fitting. Referring to fig. 2 and 16-18, preferably, one end of the static plug-in unit 2 is connected with a bus bar in the bus bar box 3, the other end provided with a clamping jack 28 protrudes out of one side of the outer shell, and the shutter device 4 is sleeved outside the other end of the static plug-in unit 2 and fixedly mounted on one side of the outer shell. Preferably, the shutter device 4 is connected with a shell of the bus box 3 in a buckling manner, a shutter installation seat 38 is arranged on the shell of the bus box 3 at a position corresponding to the static plug-in unit 2, the other end of the static plug-in unit 2 protrudes out of the shutter installation seat 38, and the shutter device 4 is connected with the shutter installation seat 38 in a buckling manner. Of course, the flap arrangement 4 can also be fixedly connected to the busbar box 3 in other ways.

In the present embodiment, a plug-in unit having a pin is used as the movable plug-in unit 1, and a plug-in unit having the holding insertion hole 28 is used as the stationary plug-in unit 2. Obviously, if necessary, the plug-in unit with the clamping socket 28 may also be installed on the drawer as a movable plug-in unit, and the corresponding plug-in unit with the pin may be used as a stationary plug-in unit 2, all falling within the scope of protection of the present invention. The circuit distribution switching device for the drawer cabinet comprises two plug connectors which are mutually in plug-in fit, one of the two plug connectors is fixedly installed as a static plug-in unit 2, the other plug connector is installed on the drawer as a movable plug-in unit 1 and corresponds to the static plug-in unit 2, one plug connector comprises a contact pin, and the other plug connector corresponds to a clamping jack 28.

Another improvement of the present invention is to provide a plug connector as the movable plug-in unit 1, as shown in fig. 3-7, a preferred embodiment of the movable plug-in unit 1 is provided, the plug connector includes a mounting seat and a pin mounted on the mounting seat, the pin includes a wiring portion 13 and a plugging portion 14 connected with the wiring portion 13, an arc-isolating sleeve 125 is disposed on the mounting seat, the arc-isolating sleeve 125 is annularly disposed outside the plugging portion 14, and the length of the arc-isolating sleeve 125 is greater than or equal to the length of the plugging portion 14. By arranging the arc-isolating sleeve 125, not only the reliable arc-isolating function between the phase and the ground is achieved, but also the inserting part 14 can be protected from being damaged during the transportation and installation processes. As described above, the plug-in unit of the present embodiment as the movable plug-in unit 1 may be obviously used as the stationary plug-in unit 2.

Preferably, when the movable plug-in unit 1 is inserted into and mated with the static plug-in unit 2, the arc isolation sleeve 125 is sleeved outside the valve device 4, and a gap between the arc isolation sleeve 125 and the insertion part 14 plays roles of being inserted into and mated with the valve device 4 and protecting, so that the safety of the movable plug-in unit 1 when being inserted into and mated with the static plug-in unit 2 is improved.

Preferably, as shown in fig. 4-7, the mounting socket of the preferred embodiment has the advantages of convenient pin installation and high reliability. The mounting seat comprises a first limiting seat 11 and a second limiting seat 12, a wiring arc isolation groove for accommodating a wiring part 13 is formed in the first limiting seat 11, a first wiring hole 112 penetrating through the first limiting seat 11 is formed in the wiring arc isolation groove, the second limiting seat 12 comprises a second limiting bottom plate 126, a second through hole 121 for the insertion part 14 to penetrate through is formed in the second limiting bottom plate 126, one side of the second limiting bottom plate 126 is provided with the arc isolation sleeve 125 around the second through hole 121, the other side of the second limiting bottom plate 126 is connected with the first limiting seat 11, the insertion part 14 of the contact pin penetrates through the second through hole 121 of the second limiting seat 12 and extends into the arc isolation sleeve 125, the wiring part 13 is mounted in the wiring arc isolation groove, and the second limiting seat 12 is fixedly connected with the first limiting seat 11 and fixes the contact pin.

Preferably, as shown in fig. 4, the inserting portion 14 and the wire connecting portion 13 of the pin of the present embodiment are both cylindrical, the inserting portion 14 is a cylindrical copper pin, and the wire connecting portion 13 is a cylindrical copper tube. Further, a bevel 141 is provided at the end of the mating part 14 to facilitate insertion. Further, the outer sides of the two ends of the wire connecting portion 13 are respectively provided with a first retaining ring 131 and a second retaining ring 132 in a protruding manner, the diameters of the first retaining ring 131 and the second retaining ring 132 are larger than that of the wire connecting portion 13, a cavity between the first retaining ring 131 and the second retaining ring 132 in the wire connecting portion 13 forms a conductor crimping area for crimping a cable, and the wire connecting portion 13 is connected with the cable in a crimping manner. The conductor crimping area is smaller in diameter, so that the conductor crimping area is not in contact with the inner wall of the wiring arc isolating groove. Because the conductor crimping area is irregular in surface after the cable is cold-pressed, under the blocking of the first blocking ring 131 and the second blocking ring 132, the conductor crimping area is separated from the inner wall of the wiring flash barrier groove, so that the axis of the installation of the contact pin is horizontal, the deviation of the axis of the contact pin and the axis of the static plug-in unit 2 is small, and the installation is accurate.

Preferably, as shown in fig. 4 to 6, the second limiting base 12 fixes the pin through the second retaining ring 132 of the wiring portion 13, one side of the second retaining ring 132 close to the insertion portion 14 is a first surface, the other side is a second surface, one side of the second limiting bottom plate 126 connected to the first limiting base 11 is provided with a pressing protrusion 122 matched with the first surface at a position corresponding to the outside of the second through hole 121, the outside of the pressing protrusion 122 is provided with a first barb 123 in clamping fit with the second surface, the pressing protrusion 122 and the first barb 123 fix the pin on the second limiting base 12, after the pin is inserted into the second through hole 121, the pressing protrusion 122 is attached to the first surface, and the first barb 123 is in clamping fit with the second surface, thereby effectively limiting the moving direction of the pin.

Preferably, a plurality of contact pins are arranged on the mounting base, and a plurality of convex arc-isolating sleeves 125 corresponding to the plurality of contact pins are arranged on one side of the mounting base. Specifically, the second limiting base 12 includes a second limiting base plate 126, the second limiting base plate 126 is provided with a plurality of second through holes 121 for the insertion part 14 to pass through, one side of the second limiting base plate 126 is provided with a plurality of arc isolating sleeves 125 corresponding to the second through holes 121, and the other side of the second limiting base plate 126 is provided with a second clamping block 124 in clamping fit with the first limiting base 11; first spacing seat 11 includes first limiting bottom plate 116, and first limiting bottom plate 116 one side is fixed with second limiting bottom plate 126 joint, is equipped with the second draw-in groove 123 with second fixture block 124 joint complex, first limiting bottom plate 116 opposite side is equipped with a plurality of bellied arc tube 111 that separate, and a plurality of cavities that separate arc tube 111 form a plurality of wiring arc groove, arc tube 111's cavity run through separate arc tube 111 and first limiting bottom plate 116, and the one end of cavity is used for installing wiring portion 13, and the other end forms first wiring hole 112. Preferably, the length of the arc-isolating cylinder 111 is greater than or equal to the length of the wire connecting portion 13.

When a pin is installed, the inserting part 14 penetrates through the second through hole 121 of the second limiting seat 12 and extends into the arc isolating sleeve 125, the pressing protrusion 122 and the first barb 123 fix the pin on the second limiting seat 12, a cable penetrates through the first wiring hole 112 and then is inserted into the cavity of the wiring part 13 to be crimped, the wiring part 13 is installed in the arc isolating cylinder 111 of the first limiting seat 11, the first limiting bottom plate 116 is clamped and fixed with the second limiting bottom plate 126, the installation and wiring are convenient, and the arc isolating performance is excellent.

Another improvement of the invention is that the plug-in part as the static plug-in part 2, as shown in fig. 2, 8-10, provides a preferred embodiment of the static plug-in part 2. The plug connector is including being used for connecting the wire holder 21 of generating line to a plurality of elasticity supporting pieces 22 that the interval set up, and a plurality of elasticity supporting pieces 22 become the circumference and arrange around forming the grafting cavity, and the entry one end of grafting cavity is equipped with the circular shape centre gripping jack 28 that a plurality of elasticity supporting pieces 22 enclose, the diameter of centre gripping jack 28 is less than the diameter of grafting cavity. The movable plug-in 1 is inserted into the insertion cavity of the static plug-in 2 from the clamping insertion hole 28 for insertion matching, the clamping insertion hole 28 is expanded during insertion, the insertion part 14 of the movable plug-in 1 is clamped by the clamping insertion hole 28 after insertion, and the diameter of the insertion cavity is larger than that of the clamping insertion hole 28, so that the movable plug-in 1 can be inserted from any angle at 360 degrees, even if certain errors occur during installation of the movable plug-in 1 and the static plug-in 2, the movable plug-in 1 and the static plug-in 2 can be adjusted and aligned in both horizontal and vertical directions, sufficient contact area can be ensured, and the requirements on the assembly process and the machining precision are reduced. As described above, it is obvious that the plug-in unit of the present embodiment as the stationary plug-in unit 2 can be used as the movable plug-in unit 1.

Preferably, the clamping insertion hole 28 is further provided with a circular guide insertion hole 27 surrounded by a plurality of elastic clamping pieces 22 at one end of the inlet of the insertion cavity, the diameter of the guide insertion hole 27 is larger than that of the clamping insertion hole 28, so that the movable insertion piece 1 can be conveniently inserted into the clamping insertion hole 28, the movable insertion piece 1 and the static insertion piece 2 both have a larger adjustment space from 360 degrees, and the requirement on processing precision is lowered.

Preferably, as shown in fig. 8 to 10, the static plug-in unit 2 of the present embodiment further includes a spring ring 23, the outer side of the elastic clamping piece 22 is formed with an arc-shaped concave first concave portion 221 at a position corresponding to the position where the clamping insertion hole 28 is formed, the first concave portions 221 of the plurality of elastic clamping pieces 22 are communicated, and the spring ring 23 is sleeved in the first concave portions 221 of the plurality of elastic clamping pieces. An arc-shaped concave second concave part 223 is formed at the outer side of one end of the elastic clamping piece 22 connected with the wire holder 21, and one end of the wire holder 21 connected with the elastic clamping piece 22 is cylindrical and is provided with an arc-shaped concave third inner groove 212; the elastic clamping piece 22 is arranged outside the wire holder 21, the second inner concave portion 223 is matched with the third inner concave portion 212 and is correspondingly arranged in the third inner concave portion 212, and the second spring ring 29 is sleeved in the second inner concave portions 223 of the elastic clamping pieces to fix the elastic clamping piece 22 and the wire holder 21. The clamping force and reliability of the elastic clamping sheet 22 are increased through the spring ring 23, the movable plug-in unit 1 and the static plug-in unit 2 are in close contact, and the elastic clamping sheet 22 is reliably connected with the wire holder 21 through the second spring ring 29.

The number of the elastic clamping pieces 22 of the static plug-in unit 2 may be two, three or more, preferably three in this embodiment, so as to form a quincunx static plug-in unit 2, and the three elastic clamping pieces 22 are uniformly arranged in a circumference. Specifically, as shown in fig. 8 to 9, each elastic clamping piece 22 is integrally formed, the elastic clamping piece 22 is arc-shaped in the radial direction of the plugging cavity, the elastic clamping piece 22 sequentially forms an arc-shaped concave first concave portion 221, an arc-shaped convex third arc-shaped convex wall 222 and an arc-shaped concave second concave portion 223 at the outer side in the axial direction of the plugging cavity, and the corresponding elastic clamping piece 22 sequentially forms an arc-shaped convex first arc-shaped convex wall, an arc-shaped concave third concave portion and an arc-shaped convex second arc-shaped convex wall at the inner side in the axial direction of the plugging cavity; the third inner concave parts of the elastic clamping pieces 22 surround to form the plug cavity, so that the plug cavity is close to form a spherical structure, the first arc-shaped outer convex walls of the elastic clamping pieces 22 form the clamping insertion holes 28, and the elastic clamping pieces 22 are arranged at intervals to form heat dissipation channels. The plum blossom-shaped static plug-in unit 2 is formed by the three elastic clamping pieces 22, the three plum blossom-shaped elastic clamping pieces 22 are good in heat dissipation effect, the three plum blossom-shaped elastic clamping pieces 22 form an arc shape, the three plum blossom-shaped elastic clamping pieces are in line contact with the contact pin all the time, and friction resistance is small. Of course, as another modified embodiment, the first arc-shaped protruding wall may not be provided, and the elastic clamping piece 22 may be modified to a non-arc-shaped copper piece to form a conical static plug-in unit.

In addition, the overall dimension of plum blossom-shaped static plug-in 2 is less for current static plug-in, is favorable to reducing the space and occupies, consequently can have enough space in bus bar box 3 to arrange the static plug-in 2 of required quantity, can solve current 125A circuit drawer cabinet circuit distribution switching device and can't realize the wiring mode of three-phase four-wire under current specification and dimension condition, especially in the height of static plug-in 2, can solve the great problem in current metal casing drawer cabinet circuit distribution switching device thickness space.

Preferably, as shown in fig. 8 and 10, one end of the wire holder 21 is a cylindrical connecting seat 211, the connecting seat 211 is cylindrical and is provided with a third inner groove 212 in which an arc-shaped concave recess is formed, the other end of the wire holder 21 is provided with two sets of support legs 213 which are arranged side by side, a wire holder for connecting a bus bar is formed between the two sets of support legs 213, a pin hole is formed in the support leg 213, and a first pin 26 for connecting with the bus bar is arranged in the pin hole. When the bus is installed, the bus is firstly placed between the two groups of supporting legs 213, and then the first plug 26 is inserted to penetrate through the supporting legs 213 and the bus, so that the connection between the bus connecting part and the bus is realized.

A further improvement of the present invention, as shown in fig. 2 and 11-15, is to provide a preferred embodiment of the valve assembly. The shutter device 4 comprises a shutter barrel 41 provided with the channel, the shielding mechanism comprises a shutter elastic part 43 and a shutter baffle 42, the shutter baffle 42 is arranged at one end of the shutter barrel 41 in a sliding mode, the shutter elastic part 43 is used for driving the shutter baffle 42 to close the channel, a driving inclined plane 4221 used for being matched with the movable plug-in unit 1 is arranged on the shutter baffle 42, and the movable plug-in unit 1 drives the shutter baffle 42 to overcome the elastic force of the shutter elastic part 43 through the driving inclined plane 4221 to slide and open the channel.

The trap barrel 41 of this embodiment is of cylindrical hollow construction which forms the passageway or which forms the passageway together with the gripping socket 28 at one end of the static insert 2 received within the hollow construction. One end of the valve gun barrel 41 is clamped with the bus box 3, and the other end of the valve gun barrel is matched with the valve baffle plate 42. The shutter barrel 41 is sleeved on the outer side of one end of the static plug-in unit 2, the shutter baffle 42 and the shutter elastic member 43 are arranged at one end of the shutter barrel 41, the shutter baffle 42 is arranged in a linear sliding mode along the radial direction of the shutter barrel 41, the shutter elastic member 43 is a compression spring, one end of the shutter elastic member is connected with the shutter baffle 42, the other end of the shutter elastic member is connected with the shutter barrel 41, the shutter baffle 42 is driven to close the channel, and the structure is simple and the protection level is high.

As shown in fig. 11 to 13, preferably, the shutter device 4 includes two sets of shutter baffles 42 symmetrically arranged, the shutter baffles 42 are respectively connected with two shutter elastic members 43, the two shutter elastic members 43 respectively drive the two sets of shutter baffles 42 to move in opposite directions along the radial direction of the shutter barrel 41 to shield the channel, and when the movable plug-in 1 is inserted into the shutter barrel 41, the two sets of shutter baffles 42 are driven by the inclined surfaces 4221 of the two sets of shutter baffles 42 to move in directions away from each other to open the channel. Fig. 12 is a state when the two sets of shutter baffles 42 open the channel, fig. 13 is a state when the two sets of shutter baffles 42 close the channel, in the figure, the two sets of shutter baffles 42 respectively slide left and right, and certainly can be set to slide up and down as required, and in this embodiment, by setting the two sets of shutter baffles 42, the distance that each set of shutter baffles 42 moves is reduced, so as to reduce the volume of the shutter device 4. Of course, 1 or three or more shutter stoppers 42 may be provided as necessary. When a plurality of shutter baffles 42 are provided, each shutter baffle 42 may be fan-shaped, the shutter baffles 42 may be pieced together into a circle, the shutter baffles 42 are clamped by a plurality of tension springs, and the movable insert 1 drives the shutter baffles 42 to slide in each direction through the driving inclined plane 4221.

As shown in fig. 11 to 14, it is preferable that the shutter retainer 42 includes a movable portion for cooperating to open the passage when the movable inserter 1 is inserted into the shutter barrel 41, and closing the passage when the movable inserter 1 withdraws the shutter barrel 41; the reset connecting part is used for being matched with the valve elastic piece 43; the guide portion is used for moving and guiding in cooperation with the shutter barrel 41.

Preferably, the movable part is located at the top side of the valve baffle 42 matched with the movable plug-in unit 1 and comprises a limiting plate 421 and a driving inclined plate 422 provided with a driving inclined surface 4221, and the limiting plate 421 is horizontally arranged and has a U-shaped structure; the driving inclined plate 422 is inclined towards being close to the central axis of the valve barrel 41 and towards being far away from the movable plug-in unit 1 to form a driving inclined plane 4221, the driving inclined plate 422 is in sliding fit with the movable plug-in unit 1, the driving and guiding effects are achieved to facilitate the insertion of the movable plug-in unit 1, the limiting plate 421 is used for supporting the driving inclined plate 422, and limiting protrusions are formed on the rest sides of the driving inclined plate 422 except the side close to the central axis of the valve barrel 41.

Preferably, the reset connection portion includes a first half groove 423 disposed at a bottom side of the shutter baffle 42 opposite to the shutter barrel 41, a second half groove 413 is correspondingly disposed at one end of the shutter barrel 41, and the first half groove 423 and the second half groove 413 correspond to each other to form an elastic installation space for accommodating the shutter elastic member 43. Further, the valve baffle 42 is provided with a first connecting plate 424 at one end of the elastic installation space, the first connecting plate 424 is provided with a first installation column 425, the valve barrel 41 is provided with a second connecting plate 414 at the other end of the elastic installation space, the valve elastic member 43 is a pressure spring and is installed in the elastic installation space, one end of the valve elastic member 43 is sleeved on the first installation column 425, and two ends of the valve elastic member are respectively abutted against the first connecting plate 424 and the second connecting plate 414.

Preferably, the guide portion includes a first slider 428 and a second barb 427 disposed on a bottom side of the shutter retainer 42 opposite to the shutter barrel 41, one end of the shutter barrel 41 is correspondingly provided with a first sliding slot 415 and a second sliding slot 416 respectively engaged with the first slider 428 and the second barb 427 along a moving direction of the shutter retainer 42, the first slider 428 is in a strip shape and extends into the first sliding slot 415 for guiding in an engaged manner, the first sliding slot 415 is disposed on an outer side of the second sliding slot 416, one end of the second sliding slot 416 is communicated with a channel in the middle of the shutter barrel 41 for installing the second barb 427, the second barb 427 includes a guide strip and a barb located at an end of the guide strip, and the guide strip is in a sliding engagement with the second sliding slot 416 and is limited by the barb to prevent the shutter retainer 42 from falling out of the shutter barrel 41. Specifically, two sets of the guide portions are respectively located at two sides of the movable portion, two horizontally disposed support plates 426 are respectively located at two sides of the limit plate 421 of the movable portion, and a set of the first slider 428 and the second barb 427 are respectively located at the bottom sides of the support plates 426 at the two sides.

When the movable plug-in 1 is in plug fit with the static plug-in 2, the movable plug-in 1 extrudes two valve baffles 42 along a driving inclined plane 4221, a second barb 427 and a first slider 428 play a role in guiding the motion track of the valve baffles 42 in the moving process of the valve baffles 42, the second barb 427 plays a role in limiting to prevent the valve baffles 42 from falling off, meanwhile, the first connecting plate 424 extrudes a valve elastic piece 43, the valve elastic piece 43 is in a compression state, the movable plug-in 1 extends into and penetrates a valve barrel 41 to be in plug fit with the static plug-in 2, and the valve baffles 42 cling to two sides of the movable plug-in 1 at the moment to play a protection role; after the movable plug-in 1 is separated from the static plug-in 2, the valve elastic member 43 pushes the valve baffle 42 to reset, and the passage of the valve barrel 41 is closed.

As shown in fig. 2, 16 to 21, the bus bar box 3 includes a casing and bus bars provided in the casing. Preferably, the housing includes a first limiting plate 31 and a second limiting plate 32, and the bus includes an incoming bus 33 and an outgoing bus 34. The first limiting plate 31 and the second limiting plate 32 are fastened to each other and form a cavity inside, the incoming buses 33 of the embodiment are four in number and are arranged from top to bottom on the lower half part of the cavity, and the outgoing buses 34 are four in number and are arranged from top to bottom on the upper half part of the cavity. The incoming line bus 33 and the outgoing line bus 34 are arranged in parallel at intervals, two ends of the incoming line bus 33 are respectively connected with the static plug-in 2, the incoming line bus 33 is further connected with the main incoming line plug-in 323, one end of the outgoing line bus 34 is connected with the static plug-in 2, and the other end of the outgoing line bus is connected with the cable overlapping row 342. The bottom of the wire holder 21 on the static plug-in 2 is connected to the end of the busbar by a first plug 26 (fig. 8).

Preferably, a cylindrical shutter mounting seat 38 used for being connected with the shutter barrel 41 is arranged on the outer side of the first limiting plate 31 of the housing, one end of the static plug-in unit 2 penetrates out of the shutter mounting seat 38, the shutter barrel 41 is in clamping fit with the shutter mounting seat 38, a circular first limiting groove 383 is formed on the side edge of the end portion of the shutter mounting seat 38, a circular inner limiting ring 382 is formed on the inner side of the first limiting groove 383, an outer limiting ring 384 is formed on the outer side of the first limiting groove 383, and a third clamping groove 381 is formed on the inner side wall of the outer limiting ring 384 communicated with the first limiting groove 383.

Preferably, a third clamping block 412 clamped with the third clamping groove 381 is arranged on the outer side of the end, connected with the valve mounting seat 38, of the valve barrel 41, and an annular limiting groove 411 matched with the inner limiting ring 382 is formed on the inner side of the end. When the valve barrel 41 is installed, one end of the valve barrel 41 is installed in the first limiting groove 383, the inner limiting ring 382 on the valve installation seat 38 is embedded in the annular limiting groove 411, and the third clamping block 412 is connected with the third clamping groove 381 in a clamping mode. Through the arrangement of the first limiting groove 383 and the annular limiting groove 411, reliable closed connection is achieved, the protection capability is improved, and the stability is improved while the reliable electrical safety distance is guaranteed.

Preferably, the first limiting plate 31 and the second limiting plate 32 are fixed by a fixture block and a clamping groove in a matching manner, the four groups of incoming buses 33 are respectively arranged corresponding to four phases a, B, C and N from top to bottom, the four groups of outgoing buses 34 are respectively arranged corresponding to four phases a, B, C and N from top to bottom, and the eight groups of buses are arranged in parallel from top to bottom. Correspondingly, the second limiting plate 32 is provided with four groups of main wire inlet seats 322, a main wire inlet plug-in 323 connected with a group of wire inlet buses 33 is arranged in each main wire inlet seat 322, and the main wire inlet bus in each main wire inlet plug-in 323 is connected with a group of wire inlet buses 33. The corresponding second limiting seat 12 is provided with four groups of main outlet seats 39, cable overlapping rows 342 are installed in the main outlet seats 39, and each cable overlapping row 342 is connected with one group of outlet buses 34.

Preferably, a bus bar clamping groove 329 for clamping the bus bar and a connection support seat 327 for mounting the static plug-in unit 2 are arranged on the inner side of the second limit plate 32, a second separation lug 321 is arranged between adjacent bus bars of the second limit plate 32, a first separation lug 312 is arranged on the first limit plate 31 corresponding to the second separation lug 321, and a valve mounting seat 38 is arranged on the first limit plate 31 corresponding to the connection support seat 327; the bus bar slot 329 of this embodiment is formed by a plurality of bus bar slot convex ribs arranged on the adjacent second partition lug 321, the incoming line bus 33 and the outgoing line bus 34 are respectively installed in the corresponding bus bar slot 329, the static plug-in unit 2 is installed on the connection support seat 327, when the first limit plate 31 and the second limit plate 32 are fastened in a clamping manner, the first partition lug 312 and the second partition lug 321 correspondingly isolate the adjacent bus bar, so as to ensure the electrical insulation between the bus bars, one end of the static plug-in unit 2 provided with the clamping jack 28 penetrates out from the valve mounting seat 38, and the valve barrel 41 is connected with the valve mounting seat 38 in a clamping manner and covers the static plug-in unit 2.

Preferably, an insulating sleeve 324 is arranged at a position of the incoming bus 33 corresponding to the main incoming plug 323 connected with the adjacent bus, and/or an insulating sleeve 324 is arranged at a position of the outgoing bus 34 corresponding to the cable overlapping row 342 connected with the adjacent bus. For example, an insulation sleeve 324 sleeved on the incoming bus 33 is arranged at a position where the a-phase incoming bus 33 corresponds to the B-phase main incoming plug 323, the B-phase incoming bus 33 corresponds to the C-phase main incoming, and the C-phase incoming bus 33 corresponds to the N-phase main incoming plug 323, so as to ensure electrical safety therebetween. Preferably, the N-phase outlet bus 34 is provided with an insulating sleeve 324 sleeved on the outlet bus 34 corresponding to the C-phase cable overlapping row 342 to ensure electrical safety therebetween.

The cross section of the insulating sleeve 324 of this embodiment is U-shaped, the bus is established in order to overlap to its holding tank 328 that forms rectangular shape, all set up the first arc groove 325 of rectangular shape on the lateral wall of the both sides of holding tank 328, correspond on first limiting plate 31 and be equipped with the first arc lug 326 that sets up with the grafting of first arc groove 325, after first limiting plate 31 and second limiting plate 32 joint, first arc lug 326 imbeds in the first arc groove 325 to guarantee that a looks inlet wire generating line 33 corresponds B looks main inlet wire generating line 35, B looks inlet wire generating line 33 corresponds C looks main inlet wire, C looks inlet wire generating line 33 corresponds N looks main inlet wire generating line 35, N looks outlet wire generating line 34 corresponds C looks cable overlap joint row 342 department and has sufficient electrical safety.

Preferably, the first limiting plate 31 is provided with insulating protrusions 311 on both sides of the bus bar at positions close to the static electricity plug-in unit 2 and the shutter installation seat 38, so as to ensure sufficient electrical insulation between the static electricity plug-in unit 2 and the adjacent bus bar.

Preferably, a sealing sheet 37 connected with the valve mounting seat 38 is further arranged on the casing of the bus box 3, the first limiting plate 31 is provided with the sealing sheet 37 on the valve mounting seat 38 corresponding to the N-phase, when the circuit distribution switching device adopts a three-phase scheme, the sealing sheet 37 seals the valve mounting seat 38 of the N-phase, and when the circuit distribution switching device adopts a four-phase scheme, the sealing sheet 37 is removed, so that wiring can be performed on the three-phase scheme and the four-phase scheme. The cover 37 may be an integrated cover for easy knock-off, or a snap cover snap-connected to the valve mounting seat 38.

Preferably, the bus box 3 is provided with a heat dissipation hole 36 communicated with the outside to reduce the temperature rise of the bus.

The bus box 3 of the embodiment is provided with a bus clamping groove 329 for clamping a bus, and is provided with a first separation lug 312 and a second separation lug 321 for separating a plurality of buses, and is also provided with an insulation sleeve 324 and an insulation bulge 311 at key positions, so that the electrical insulation of the buses in the bus box 3 is ensured, and the safety is improved.

In the second embodiment, a circuit distribution and switching device for a drawer cabinet has a structure substantially the same as that of the first embodiment, and is different from the first embodiment in that the circuit distribution and switching device is a plug connector structure of a movable plug connector 1. As shown in fig. 22-24, in another embodiment of the movable plug-in unit 1, the movable plug-in unit 1 includes a mounting seat and a pin mounted on the mounting seat, the pin includes a wiring portion 13 and a plugging portion 14, an arc isolating sleeve 125 is disposed on the mounting seat, the arc isolating sleeve 125 is annularly disposed outside the plugging portion 14, and the length of the arc isolating sleeve 125 is greater than or equal to the length of the plugging portion 14. The plug-in part 14 and the arc-isolating sleeve 125 of the movable plug-in unit 1 of the present embodiment are similar to the movable plug-in unit 1 of the first embodiment, except for the mounting seat and the wire connecting part 13.

As shown in fig. 22-24, the mounting base of this embodiment is an integrated first fixing base 15, the insertion portion 14 of the pin is a cylindrical copper pin, the wiring portion 13 is a square copper rod, the wiring portion 13 is connected with the cable by a bolt, and the wiring portion 13 is fixed with the first fixing base 15 by a bolt.

Specifically, the first fixing base 15 is plate-shaped, a plurality of second through holes 121 for the insertion portion 14 to pass through are formed in the first fixing base 15, the arc isolating sleeve 125 is arranged on one side of the first fixing base 15 around the second through holes 121, a first supporting base 151 is arranged on the other side of the first fixing base 15 corresponding to the second through holes 121, the insertion portion 14 of the pin passes through the second through holes 121 and extends into the arc isolating sleeve 125, and the first supporting base 151 and the wiring portion 13 are fixed through a second bolt 152. Preferably, a first arc-isolating plate 153 is further disposed on one side of the first fixing seat 15 where the wire connecting portion 13 is disposed, the first arc-isolating plate 153 being spaced between the plurality of wire connecting portions 13, and a height of the first arc-isolating plate 153 is greater than or equal to a height of the wire connecting portion 13. Preferably, the first supporting base 151 is square, and the height of the square copper rod is greater than that of the first supporting base 151 for wiring.

In the third embodiment, a circuit distribution and switching device for a drawer cabinet has a structure substantially the same as that of the first embodiment, and is different from the first embodiment in that the circuit distribution and switching device is a plug connector structure of a movable plug connector 1. As shown in fig. 25-27, in another embodiment of the movable plug-in unit 1, the movable plug-in unit 1 includes a mounting seat and a pin mounted on the mounting seat, the pin includes a connection portion 13 and a plugging portion 14, an arc isolating sleeve 125 is disposed on the mounting seat, the arc isolating sleeve 125 is annularly disposed outside the plugging portion 14, and the length of the arc isolating sleeve 125 is greater than or equal to the length of the plugging portion 14. The plug-in part 14 and the arc-isolating sleeve 125 of the movable plug-in unit 1 of the present embodiment are similar to the movable plug-in unit 1 of the first embodiment, except for the mounting seat and the wire connecting part 13.

As shown in fig. 25 to 27, the mounting base of this embodiment is an integrated second fixing base 16, the insertion portion 14 of the pin is a cylindrical copper pin, the wiring portion 13 is a square copper sheet, the wiring portion 13 is connected with the cable by a bolt fixing method, and the wiring portion 13 is fixed with the first fixing base 15 by a bolt.

Specifically, the second fixing base 16 is shaped like a plate, a plurality of second through holes 121 for the insertion portion 14 to pass through are formed in the second fixing base 16, the arc isolating sleeve 125 is arranged on one side of the second fixing base 16 around the second through holes 121, a second supporting seat 161 is arranged on the other side of the second fixing base 16 corresponding to the second through holes 121, the insertion portion 14 of the pin passes through the second through holes 121 and extends into the arc isolating sleeve 125, and the second supporting seat 161 and the wiring portion 13 are fixed through a third bolt 162. Preferably, a second arc isolating plate 163 is further disposed on one side of the second fixing base 16 where the wire connecting portion 13 is disposed, the second arc isolating plate 163 is spaced between the plurality of wire connecting portions 13, the height of the second arc isolating plate 163 is greater than or equal to the height of the wire connecting portion 13, and the second arc isolating plate 163 of this embodiment is correspondingly bent to avoid the sheet-shaped wire connecting portion 13. Preferably, the second fixing base 16 is rectangular, and the height of the square copper sheet is greater than that of the second fixing base 16 so as to facilitate wiring.

In the fourth embodiment, a circuit distribution adapter device for a drawer cabinet has a structure substantially the same as that of the first embodiment, except that a plug connector structure is used as the static plug connector 1. As shown in fig. 28, the static plug-in unit 1 includes a plurality of elastic clamping pieces 22 arranged circumferentially, the plurality of elastic clamping pieces 22 form an insertion cavity similar to a circular truncated cone structure, a clamping insertion hole 28 is formed at one end of the circular truncated cone structure with a small diameter, and no guiding insertion hole 27 is provided. The static insert 1 further comprises a first cylinder 225 connected to the resilient clamping strip 22, the first cylinder 225 being a copper tube connected to the busbar.

Fifth embodiment, a drawer cabinet circuit distribution adapter device has a structure substantially the same as that of the first embodiment, and is different from the first embodiment in that it is a plug connector structure of the static plug connector 1. As shown in fig. 29, the static insert 1 of the present example is similar to the embodiment of fig. 28, and on the basis of the embodiment of fig. 28, a plurality of elastic clamping pieces 22 are formed with insertion holes 27. The static plug-in unit 1 comprises a plurality of elastic clamping pieces 22 which are circumferentially arranged, the elastic clamping pieces 22 form a plug cavity, one end of the plug cavity forms a clamping jack 28, the outer side of each elastic clamping piece 22 correspondingly forms a first concave part 221 which is concave in an arc shape at the position where the clamping jack 28 is formed, a guide plug hole 27 is formed at one end of an inlet of the plug cavity, and the diameter of the guide plug hole 27 is larger than that of the clamping jack 28.

Sixth embodiment, a drawer cabinet circuit distribution switching device has a structure substantially the same as that of the first embodiment, except that it is a plug-in connector structure of the static plug-in unit 1. As shown in fig. 30, the static insert 1 of the present example is similar to the embodiment of fig. 29, and further includes a spring ring 23 in addition to the embodiment of fig. 29, the spring ring 23 being fitted in the first concave portions 221 of the plurality of elastic holding pieces 22.

Seventh embodiment, a circuit distribution adapter device for a drawer cabinet has a structure substantially the same as that of the first embodiment, except for a structure of a shutter mechanism of the shutter device 4. As shown in fig. 2, 31-36, the shutter arrangement 4 comprises a barrel 44 provided with the passage, and a shutter mechanism capable of closing and opening the passage. The barrel 44 is similar to the first embodiment in that the barrel 44 is cylindrical and has a passage extending axially through the barrel 44, and the barrel 44 in this embodiment has a cylindrical hollow structure forming the passage, or the hollow structure and the holding insertion hole 28 at one end of the static plug-in unit 2 accommodated in the hollow structure form the passage together. The shielding mechanism comprises an elastic blocking piece 45 arranged at one end of the gun barrel 44, and the other end of the gun barrel 44 can be clamped with the valve mounting seat 38 of the bus box 3. The elastic blocking piece 45 comprises a plurality of elastic movable pieces 452, one ends of the elastic movable pieces 452 are connected with the gun barrel 44, free ends of the other ends of the elastic movable pieces 452 extend towards the axis of the gun barrel 44 to block the channel, when the movable plug-in unit 1 is inserted, the free ends of the elastic movable pieces 452 are squeezed open, the free ends of the elastic movable pieces 452 are deformed and bent to open the channel, and the movable plug-in unit 1 is in plug-in fit with the static plug-in unit 2; when the movable plug-in unit 1 is pulled out, the elastic movable piece 452 automatically resets to close the channel.

Preferably, the elastic blocking piece 45 is integrally formed, a plurality of cutting lines 451 are formed on the elastic blocking piece 45, and the elastic blocking piece 45 is formed into a plurality of elastic movable pieces 452. Preferably, the elastic blocking piece 45 in this embodiment is a circular blocking piece, a tangent line 451 that passes through the center of the elastic blocking piece 45 and forms a cross-shaped structure is disposed on the circular elastic blocking piece 45, and the tangent line 451 divides the elastic blocking piece 45 into four fan-shaped elastic movable pieces 452. In the present embodiment, there are four elastic movable pieces 452, but more elastic movable pieces 452 may be provided as needed. Of course, the elastic flap 45 may not be integrally formed, and may not be circular.

Preferably, shelter from the mechanism and still include rubber ring 46, one side of the free end of elasticity activity piece 452 is equipped with bulge 453, and the bulge 453 of a plurality of elasticity activity pieces 452 pieces into protruding post, and rubber ring 46 overlaps and drives the free end of elasticity activity piece 452 on protruding post and reset and close the passageway, through the setting of rubber ring 46, improve the reliability, the leakproofness of elasticity separation blade 45, improve the life who shelters from the mechanism.

Preferably, the protruding portion 453 of each elastic movable piece 452 is provided with a circular arc-shaped limiting groove 454, the protruding portions 453 of the elastic movable pieces 452 are spliced into a protruding column at the center of the elastic blocking piece 45, the limiting grooves 454 of the elastic movable pieces 452 are communicated with each other to form a circular ring-shaped structure on the protruding column, and the rubber ring 46 is sleeved on the circular ring-shaped structure to realize stable matching of the rubber ring 46. The movable plug-in 1 overcomes the elasticity of the rubber ring 46 to extrude the free end of the elastic movable sheet 452 to be in plug fit with the static plug-in 2, and when the movable plug-in 1 is pulled out, the rubber ring 46 contracts to drive the free end of the elastic movable sheet 452 to reset and close the channel of the valve device 4.

Preferably, the projection 453 of the elastic movable piece 452 of the present embodiment is located on the inner side of its passage toward the barrel 44, i.e., on the side away from the movable insert 1. Preferably, the outer side of the plurality of elastic moving blades 452, i.e., the side facing the moving insert 1, is provided with an inclined surface for facilitating the insertion of the moving insert 1, and the center of the elastic blocking blade 45 is formed with an indent. Of course, as another embodiment, the projections 453 may be provided outside the elastic movable piece 452, and the center of the convex column formed by the plurality of projections 453 is recessed to form a slope for facilitating the insertion of the movable plug-in unit 1.

Preferably, the barrel 44 includes a first cylinder 442 and a first ring 441 disposed at one end of the first cylinder 442, the first ring 441 is disposed coaxially with the first cylinder 442, and the inner diameter of the first ring 441 is smaller than that of the first cylinder 442. The elastic block piece 45 is installed in the first cylinder 442 and is in limit fit with the first ring 441. Preferably, the gun barrel 44 is clamped with the bus bar box 3 to limit the elastic baffle 45 between the first ring 441 and the bus bar box 3.

Specifically, first clamping blocks 443 are arranged on two inner sides of the first ring 441, the elastic blocking piece 45 is circular, a second ring 455 is arranged on the circumferential side of the elastic blocking piece 45, and first clamping grooves 456 matched with the first clamping blocks 443 in a clamped mode are formed in the second ring 455, so that the elastic blocking piece 45 and the gun barrel 44 can be installed quickly.

Preferably, as shown in fig. 35 to 36, the shutter device 4 is mounted on the bus box 3 in correspondence with the static insert 2, and has one end provided with a shutter mechanism facing the movable insert 1 for closing the static insert 2 when the movable insert 1 is extracted. The mother line box 3 is provided with a valve mounting seat 38 corresponding to the static plug-in 2, the valve mounting seat 38 is hollow, one end of the static plug-in 2 close to the dynamic plug-in 1 is inserted into the valve mounting seat 38, the gun barrel 44 is sleeved outside the valve mounting seat 38, and an elastic blocking piece 45 of the valve device 4 is limited between the gun barrel 44 and the valve mounting seat 38. The third clamping groove 381 is formed in two sides, close to the movable plug-in unit 1, of the end portion of the valve mounting seat 38, the end portion of the first clamping block 443 extends out of the first clamping groove 456 to be in clamping fit with the third clamping groove 381, the second annular limiting groove 385 is formed in the end portion of the valve mounting seat 38, the annular limiting ring 457 matched with the second annular limiting groove 385 is arranged on the second circular ring 455, the elastic blocking piece 45 is limited between the first circular ring 441 and the bus box 3, the annular limiting ring 457 is embedded into the second annular limiting groove 385, and reliability and sealing performance are improved through the arrangement of the annular limiting groove 454 and the annular limiting ring 457. Further, the two sides of the gun barrel 44 are open, and when the gun barrel 44 is installed, the valve installation seat 38 is sleeved with the gun barrel 44, and the gun barrel 44 can be conveniently sleeved with the open.

The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the inventive concept, and all should be considered as falling within the protection scope of the invention.

Claims (10)

1. A connector, characterized by: including elastic clamping piece (22) that a plurality of intervals set up, a plurality of elastic clamping piece (22) become the circumference and arrange around forming the grafting cavity, and the entry one end of grafting cavity is equipped with circular shape centre gripping jack (28) that a plurality of elastic clamping piece (22) enclose, the diameter of centre gripping jack (28) is less than the diameter of grafting cavity.

2. The connector of claim 1, wherein: the clamping jack (28) is further provided with a circular guide plug hole (27) formed by surrounding a plurality of elastic clamping sheets (22) at one end of the inlet of the plug cavity, and the diameter of the guide plug hole (27) is larger than that of the clamping jack (28).

3. The connector according to claim 1 or 2, characterized in that: still include spring coil (23), elasticity clamping piece (22) outside forms first interior concave part (221) of arc indent in the position that corresponds formation centre gripping jack (28), and first interior concave part (221) intercommunication of a plurality of elasticity clamping piece (22), and spring coil (23) cover is in first interior concave part (221) of a plurality of elasticity clamping pieces.

4. The connector of claim 3, wherein: the wire holder is characterized by further comprising a wire holder (21) connected with the elastic clamping piece (22), an arc-shaped concave second concave part (223) is formed on the outer side of one end, connected with the wire holder (21), of the elastic clamping piece (22), and a cylindrical third concave groove (212) with an arc-shaped concave is formed in one end, connected with the elastic clamping piece (22), of the wire holder (21); the second inner recess (223) is fitted with the third inner recess (212), and the second spring ring (29) is fitted in the second inner recess (223) of the plurality of elastic clamping pieces to fix the elastic clamping pieces (22) with the wire holder (21).

5. The connector of claim 1, wherein: the elastic clamping piece (22) is arc-shaped in the radial direction of the plug-in cavity, a first arc-shaped concave inner part (221), a third arc-shaped convex outer wall (222) and a second arc-shaped concave inner part (223) are sequentially formed on the outer side of the elastic clamping piece (22) in the axial direction of the plug-in cavity, and a first arc-shaped convex outer wall, a third arc-shaped concave inner part and a second arc-shaped convex outer wall which are arc-shaped and concave are sequentially formed on the inner side of the corresponding elastic clamping piece (22) in the axial direction of the plug-in cavity; the third inner concave parts of the elastic clamping sheets (22) surround the plug-in cavity body which forms a spherical structure, and the first arc-shaped outer convex walls of the elastic clamping sheets (22) form the clamping insertion holes (28).

6. The utility model provides a drawer cabinet circuit distribution switching device which characterized in that: including quiet plug-in components (2) and move plug-in components (1), its characterized in that: the static insert (2) or the dynamic insert (1) is an insert according to any one of claims 1 to 5.

7. The utility model provides a drawer cabinet circuit distribution switching device which characterized in that: the drawer cabinet connector comprises a movable plug-in (1), a static plug-in (2) and a bus box (3), wherein the static plug-in (2) is the plug connector as claimed in any one of claims 1 to 5, the bus box (3) comprises a shell and a bus arranged in the shell, the static plug-in (2) is arranged in the shell and is connected with the bus, the movable plug-in (1) is arranged on the drawer cabinet and corresponds to the static plug-in (2), the movable plug-in (1) comprises a mounting seat and a plug pin arranged on the mounting seat, and the plug pin comprises a plug-in part (14) which is in plug-in fit with the static plug-in (2).

8. The drawer cabinet circuit distribution switching device of claim 7, wherein: the device is characterized by also comprising a valve device (4) arranged between the movable plug-in (1) and the static plug-in (2), wherein the valve device (4) is provided with a channel communicated with the static plug-in (2) and a shielding mechanism capable of closing and opening the channel; the drawer cabinet can drive the movable plug-in (1) to move towards the static plug-in (2), so that the shielding mechanism of the movable valve device (4) driven by the movable plug-in (1) is opened, and the channel is in plug-in fit with the static plug-in (2).

9. The drawer cabinet circuit distribution adapter device of claim 8, wherein: the shell of bus box (3) is including first limiting plate (31) and second limiting plate (32) of mutual lock, second limiting plate (32) inboard is equipped with bus-bar draw-in groove (329) that clamps the generating line and be used for installing joint support seat (327) of quiet plug-in components (2), second limiting plate (32) are equipped with second partition lug (321) between adjacent generating line, first limiting plate (31) correspond second partition lug (321) and are equipped with first partition lug (312), valve mount pad (38) have been seted up to the position that first limiting plate (31) correspond joint support seat (327), first partition lug (312) correspond with second partition lug (321) and keep apart adjacent generating line, quiet plug-in components (2) are installed in joint support seat (327), the one end that quiet plug-in components (2) were equipped with centre gripping jack (28) is worn out from valve mount pad (38), barrel (41) and valve mount pad (38) joint just cover quiet plug-in components (2).

10. The drawer cabinet circuit distribution adapter device of claim 7, wherein: the bus in the bus box (3) comprises an incoming bus (33) and an outgoing bus (34), the incoming bus (33) and the outgoing bus (34) are arranged in parallel at intervals, two ends of the incoming bus (33) are respectively connected with the static plug-in (2), the incoming bus (33) is also connected with the main incoming plug-in (323), one end of the outgoing bus (34) is connected with the static plug-in (2), and the other end of the outgoing bus is connected with a cable overlapping row (342); the position that inlet wire generating line (33) correspond main inlet wire plug-in components (323) be connected with adjacent generating line is equipped with insulating cover (324), and/or outlet wire generating line (34) correspond the position of adjacent bus connection cable overlap joint row (342) and are equipped with insulating cover (324), be equipped with mounting plate (37) on corresponding N looks valve mount pad (38) on the shell of generating line box (3).

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