CN215869926U - Circuit distribution switching device for drawer cabinet - Google Patents

Abstract

A circuit distribution switching device of a drawer cabinet comprises a movable plug-in unit, a static plug-in unit and a bus box, wherein 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 a drawer and corresponds to the static plug-in unit, the circuit distribution switching device also comprises a valve device arranged between the movable plug-in unit and the static plug-in unit, the valve 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 movable plug-in unit drives the shielding mechanism of the valve device to open the channel and penetrates through the channel to be in plug-in fit with the static plug-in unit; the drawer cabinet can drive the movable plug-in unit to be separated from the static plug-in unit, and the shielding mechanism resets to close the channel, so that the installation protection capability of the circuit distribution switching device is improved, the electric shock risk is reduced, and the circuit distribution switching device is effectively protected.

Description

Circuit distribution switching device for drawer cabinet

Technical Field

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

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 protection level of the existing circuit distribution switching device of the drawer cabinet is not high, after the movable plug-in unit is pulled out of the static plug-in unit, the charged static plug-in unit is not sealed, the protection level of IP40 cannot be reached, and the risk of electric shock caused by a person is relatively high, so that the problem that how to improve the protection capability of the power supply switching unit is needed to be solved is solved.

Meanwhile, according to the design requirements of the electric appliance, the circuit distribution switching device is provided with two types of three-phase or three-phase four-wire, accordingly, A, B, C three-phase or A, B, C, N three-phase four-wire wiring is arranged in the circuit distribution switching device, different bus boxes are respectively adopted for the two types of wiring, and the circuit distribution switching device is poor in universality and high in cost.

Disclosure of Invention

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

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

a circuit distribution switching device of a drawer cabinet comprises a movable plug-in unit, a static plug-in unit and a bus box, wherein 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 a drawer and corresponds to the static plug-in unit, the circuit distribution switching device also comprises a valve device arranged between the movable plug-in unit and the static plug-in unit, the valve 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 movable plug-in unit drives the shielding mechanism of the valve device to open the channel and penetrates through the channel to be in plug-in fit with the static plug-in unit; the drawer cabinet can drive the movable plug-in unit to be separated from the static plug-in unit, and the shielding mechanism resets to close the channel at the moment.

Preferably, one end of the static plug-in unit is connected with a bus in the bus box, and the valve device is sleeved outside the other end of the static plug-in unit and fixedly installed on one side of the shell.

Preferably, the valve device comprises a valve barrel provided with the channel, the shielding mechanism comprises a valve elastic part and a valve baffle, the valve baffle is arranged at one end of the valve barrel in a sliding mode, the valve elastic part is used for driving the valve baffle to close the channel, a driving inclined plane used for being matched with the movable plug-in unit is arranged on the valve baffle, and the movable plug-in unit drives the valve baffle to overcome the elastic force of the valve elastic part through the driving inclined plane to slide and open the channel.

Preferably, the valve device comprises at least two groups of valve baffles which are symmetrically arranged, the valve baffles are respectively connected with the two valve elastic members, the two valve elastic members respectively drive the two groups of valve baffles to move oppositely along the radial direction of the valve barrel to shield the channel, and the movable plug-in unit drives the two groups of valve baffles to move away from each other through the inclined surfaces of the two groups of valve baffles when being inserted into the valve barrel to open the channel.

Preferably, the top side of the valve baffle matched with the movable plug-in unit comprises a limiting plate and a driving inclined plate provided with a driving inclined plane, and the limiting plate is horizontally arranged and is of a U-shaped structure; the driving inclined plate is arranged in an opening of the limiting plate, the driving inclined plate is inclined towards the position close to the central axis of the valve gun barrel and towards the position far away from the movable plug-in unit to form a driving inclined plane, and the limiting plate forms limiting bulges on the other sides of the driving inclined plate except the side close to the central axis of the valve gun barrel.

Preferably, the bottom side of the valve baffle plate opposite to the valve barrel is provided with a first half groove, one end of the valve barrel is correspondingly provided with a second half groove, the first half groove and the second half groove correspondingly form an elastic installation space for accommodating the valve elastic part, the valve baffle plate is provided with a first connecting plate at one end of the elastic installation space, the valve barrel is provided with a second connecting plate at the other end of the elastic installation space, the valve elastic part is installed in the elastic installation space, and two ends of the valve elastic part respectively abut against the first connecting plate and the second connecting plate.

Preferably, the bottom side that valve baffle and valve barrel are relative is equipped with first slider and second barb, the one end of valve barrel corresponds along the moving direction of valve baffle and sets up respectively with first slider and second barb complex first spout and second spout, second spout one end communicates with the passageway at valve barrel middle part in order to install the second barb, and the second barb includes the gib block and is located the barb of gib block tip, and gib block and second spout sliding fit just prevent through the barb is spacing that the valve baffle from falling out from the valve barrel.

Preferably, a cylindrical valve mounting seat is arranged on the outer side of the shell of the bus box, and the valve barrel is in clamping fit with the valve mounting seat.

Preferably, a circular first limiting groove is formed in the side edge of the end portion of the valve mounting seat, a circular inner limiting ring is formed on the inner side of the first limiting groove, an outer limiting ring is formed on the outer side of the first limiting groove, and a third clamping groove is formed in the inner side wall, communicated with the first limiting groove, of the outer limiting ring; a third clamping block clamped with the third clamping groove is arranged on the outer side of the end, connected with the valve mounting seat, of the valve barrel, and an annular limiting groove matched with the inner limiting ring is formed in the inner side of the valve barrel; one end of the valve barrel is arranged in the first limiting groove, an inner limiting ring on the valve mounting seat is embedded into the annular limiting groove, and the third clamping block is connected with the third clamping groove in a clamping and buckling mode.

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 connected with the static plug-in units respectively, the incoming bus is further connected with the main incoming plug-in unit, one end of the outgoing bus is connected with the static plug-in unit, and the other end of the outgoing bus is connected with the cable overlapping row.

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 supporting seat for installing a 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 supporting seat is provided with a valve mounting seat, and the first separation lug and the second separation lug correspond to separate adjacent buses.

Preferably, 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.

Preferably, the casing of the bus box is provided with a sealing sheet corresponding to the N-phase valve mounting seat, and/or the bus box is provided with heat dissipation holes communicated with the outside.

According to the circuit distribution switching device of the drawer cabinet, the movable door device is arranged on the bus box and arranged between the movable plug-in unit and the static plug-in unit, and the movable door 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, and the circuit separation switching device is effectively protected.

In addition, the valve device comprises a valve barrel, a valve elastic part and valve baffles, wherein the hollow structure of the valve barrel is sleeved outside the static plug-in units, the two groups of valve baffles are arranged at one end of the valve barrel in a sliding mode, the valve elastic part is used for driving the valve baffles to close the channel to improve the protection capability, and the movable plug-in units drive the valve baffles to open the channel through driving inclined planes on the valve baffles, so that the structure is simple, and the protection level is high.

In addition, the bus box is provided with a bus clamping groove for clamping buses, and is provided with a first separation lug and a second separation lug for isolating a plurality of buses, and meanwhile, an insulation sleeve is further arranged at a key position and is protruded in an insulation manner, so that the electrical insulation of the buses in the bus box is ensured, and the safety is improved.

In addition, the valve barrel is in clamping fit with the valve mounting seat of the bus box, reliable sealing connection is achieved through the arrangement of the first limiting groove and the annular limiting groove, the protection capability is improved, and the reliable electrical safety distance is guaranteed while the stability is improved.

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 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 schematic cross-sectional view of the movable plug-in unit of 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 structural view of a 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 of FIG. 16;

FIG. 19 is a schematic diagram showing a first stopper plate structure of the bus 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 the movable insert according to the second embodiment at another angle;

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

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

FIG. 26 is a schematic view showing another angle structure 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 static plug-in unit according to the fourth embodiment;

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 according to 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 the inner structure thereof;

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.

Embodiment one, as shown in fig. 1-2, a circuit distribution switching device for a drawer cabinet comprises a movable plug-in unit 1, a static plug-in unit 2, a bus bar box 3 and a shutter unit 4, wherein the bus bar box 3 comprises a shell and a bus bar arranged in the shell, the static plug-in unit 2 is arranged in the shell and connected with the bus bar, the movable plug-in unit 1 is installed on a drawer of the drawer cabinet and arranged corresponding to the static plug-in unit 2, the shutter unit 4 is arranged between the movable plug-in unit 1 and the static plug-in unit 2, the shutter unit 4 is provided with a channel communicated with the static plug-in unit 2 and a shielding mechanism capable of closing and opening the channel, the shielding mechanism protects the static plug-in unit 2 when closing the channel, the movable plug-in unit 1 is arranged on the drawer of the drawer cabinet and corresponding to the static plug-in unit 2, the drawer can drive the movable plug-in unit 1 to move towards the static plug-in unit 2, so that the shielding mechanism of the shutter unit 1 drives the shutter unit 4 to open the channel, the channel of the valve device 4 penetrates through and is in plug fit with the static plug-in 2, and the wiring in the drawer cabinet is communicated with the bus in the bus box 3, so that the electrical components in the drawer cabinet are electrified; 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 shutter device 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 connected and matched, 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 of the present invention 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 isolating groove for accommodating the 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 isolating groove, the second limiting seat 12 comprises a second limiting bottom plate 126, a second through hole 121 for the insertion part 14 to pass through is formed in the second limiting bottom plate 126, one side of the second limiting bottom plate 126 is provided with the arc isolating 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 isolating sleeve 125, the wiring part 13 is installed in the wiring arc isolating 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 wiring portion 13 of the pin of the present embodiment are both cylindrical, the inserting portion 14 is a cylindrical copper pin, and the wiring 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 arc-isolating groove, so that the axis of the pin installation is horizontal, and the pin and the static plug-in unit 2 can be ensured to have small axis deviation and accurate installation.

Preferably, as shown in fig. 4 to 6, the second limiting seat 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 seat 11 is provided with a pressing protrusion 122 matched with the first surface at a position corresponding to the outer side of the second through hole 121, the outer side 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 seat 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, so as to effectively limit the moving direction of the pin.

Preferably, a plurality of contact pins are arranged on the mounting base, and a plurality of raised 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 bottom plate 126, the second limiting bottom 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 bottom 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 bottom 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, the plug-in unit of the present embodiment as the stationary plug-in unit 2 can be obviously 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. A second concave part 223 which is concave in an arc shape is formed at the outer side of one end of the elastic clamping piece 22 connected with the wire holder 21, and a third concave groove 212 which is concave in an arc shape is formed at one end of the wire holder 21 connected with the elastic clamping piece 22 and is cylindrical; 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 plug cavity, the elastic clamping piece 22 sequentially forms a first arc-shaped concave inner portion 221, a third arc-shaped convex outer wall 222 and a second arc-shaped concave inner portion 223 at the outer side in the axial direction of the plug cavity, and the corresponding elastic clamping piece 22 sequentially forms a first arc-shaped convex outer wall, a third arc-shaped concave inner portion and a second arc-shaped convex outer wall at the inner side in the axial direction of the plug 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 three plum blossom-shaped elastic clamping pieces 22 form the plum blossom-shaped static plug-in unit 2, the three plum blossom-shaped elastic clamping pieces 22 have good heat dissipation effect, the three plum blossom-shaped elastic clamping pieces 22 form an arc shape, the arc shape is always in line contact with the contact pin, and the friction resistance is small. Of course, as another deteriorated embodiment, the first arc-shaped protruding wall may not be provided, and the elastic clamping piece 22 may be changed to a non-arc-shaped copper sheet to form a conical static insertion piece.

In addition, the overall dimension of plum blossom-shaped static plug-in 2 is littleer 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 holder 211, the connecting holder 211 is cylindrical and is provided with a third inner groove 212 which is concavely arranged in an arc shape, the other end of the wire holder 21 is provided with two groups of supporting legs 213 which are arranged side by side, a wire connecting groove for connecting a bus bar is formed between the two groups of supporting legs 213, a pin hole is formed in the supporting 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 shutter barrel 41 of this embodiment is of cylindrical hollow construction which forms the passageway or which forms the passageway together with the grip socket 28 at the 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 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 block the channel, and when the movable insert 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 baffles 42 may be provided as needed. When a plurality of shutter baffles 42 are provided, each shutter baffle 42 may be fan-shaped, the shutter baffles 42 may be spliced 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 surface 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 the central axis of the valve gun barrel 41 and towards the position 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 other sides of the driving inclined plate 422 except the side close to the central axis of the valve gun 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 line buses 33 of the present embodiment have four groups and are arranged from top to bottom on the lower half part of the cavity, and the outgoing line buses 34 have four groups 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 arranged 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 A, B, C, N four phases from top to bottom, the four groups of outgoing buses 34 are respectively arranged corresponding to A, B, C, N four phases 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 outgoing bus 34 is provided with an insulating sleeve 324 sleeved on the outgoing 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, the casing of the bus box 3 is further provided with a sealing piece 37 connected with the valve mounting seat 38, the first limiting plate 31 is provided with the sealing piece 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 piece 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 piece 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 seat 15 is shaped like a plate, the first fixing seat 15 is provided with a plurality of second through holes 121 through which the insertion part 14 passes, one side of the first fixing seat 15 is provided with the arc isolating sleeve 125 around the second through holes 121, the other side of the first fixing seat 15 is provided with a first supporting seat 151 corresponding to the second through holes 121, the insertion part 14 of the pin passes through the second through holes 121 and extends into the arc isolating sleeve 125, and the first supporting seat 151 and the wiring part 13 are fixed through a second bolt 152. Preferably, a first arc-isolating plate 153 spaced between the plurality of wire connecting portions 13 is further disposed on one side of the first fixing seat 15 where the wire connecting portions 13 are disposed, and the height of the first arc-isolating plate 153 is greater than or equal to the height of the wire connecting portions 13. The first supporting seat 151 is preferably square, and the height of the square copper rod is greater than that of the first supporting seat 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 seat 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 seat 16, the arc isolating sleeve 125 is arranged on one side of the second fixing seat 16 around the second through holes 121, a second supporting seat 161 is arranged on the other side of the second fixing seat 16 corresponding to the second through holes 121, the insertion portion 14 of the insertion 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 piece 22, the first cylinder 225 being a copper tube connected to the busbar.

Fifth, a drawer cabinet circuit distribution adapter device has a structure substantially the same as that of the first embodiment, except that it is a plug connector structure of the static plug-in unit 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 blocking 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, the circumferential side of the elastic blocking piece is provided with a second ring 455, and the second ring 455 is provided with first clamping grooves 456 matched with the first clamping blocks 443 in a clamping manner, so that the elastic blocking piece 45 and the gun barrel 44 can be quickly mounted.

Preferably, as shown in fig. 35-36, the shutter device 4 is mounted on the bus bar box 3 in correspondence with the static plug-in 2, and the end provided with the shutter mechanism faces the movable plug-in 1 for closing the static plug-in 2 when the movable plug-in 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 of the end portion, close to the movable plug-in unit 1, 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 ring 455, the elastic blocking piece 45 is limited between the first 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 more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and it is not intended that the invention be limited 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 (13)

1. The utility model provides a drawer cabinet circuit distribution switching device, is including moving plug-in components (1), quiet plug-in components (2), bus box (3) are including the shell and locate the interior generating line of shell, quiet plug-in components (2) are located in the shell and are linked to each other with the generating line, move plug-in components (1) and install on the drawer and correspond the setting with quiet plug-in components (2), its characterized in that: 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 movable plug-in (1) drives a shielding mechanism of the valve device (4) to open the channel, and the movable plug-in passes through the channel to be in plug-in fit with the static plug-in (2); the drawer cabinet can drive the movable plug-in (1) to be separated from the static plug-in (2), and the shielding mechanism resets and closes the channel at the moment.

2. The drawer cabinet circuit distribution switching device of claim 1, wherein: quiet plug-in components (2) one end with bus connection in the bus box (3), valve device (4) cover is in the other end outside of quiet plug-in components (2) and fixed mounting in shell one side.

3. The drawer cabinet circuit distribution switching device of claim 1, wherein: 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) matched with the movable plug-in component (1) is arranged on the shutter baffle (42), and the movable plug-in component (1) is driven by the driving inclined plane (4221) to overcome the elastic sliding of the shutter elastic part (43) to open the channel.

4. The drawer cabinet circuit distribution switching device of claim 3, wherein: the valve device (4) comprises at least two groups of valve baffles (42) which are symmetrically arranged, the valve baffles (42) are respectively connected with two valve elastic parts (43), the two valve elastic parts (43) respectively drive the two groups of valve baffles (42) to move in opposite directions along the radial direction of the valve gun barrel (41) to shield the channel, and the channel is opened by the inclined plane (4221) of the two groups of valve baffles (42) when the movable plug-in component (1) is inserted into the valve gun barrel (41) to move in the direction of being away from each other.

5. The drawer cabinet circuit distribution switching device of claim 3, wherein: the top side of the valve baffle (42) matched with the movable plug-in (1) comprises a limiting plate (421) and a driving inclined plate (422) provided with a driving inclined plane (4221), and the limiting plate (421) is horizontally arranged and is of a U-shaped structure; the driving inclined plate (422) is arranged in an opening of the limiting plate (421), the driving inclined plate (422) is inclined towards the central axis of the valve gun barrel (41) and towards the position far away from the movable plug-in piece (1) to form a driving inclined plane (4221), and the limiting plate (421) forms a limiting bulge on the other side edges of the driving inclined plate (422) except the side close to the central axis of the valve gun barrel (41).

6. The drawer cabinet circuit distribution switching device of claim 3, wherein: the bottom side that valve baffle (42) and valve barrel (41) are relative is equipped with first half groove (423), the one end correspondence of valve barrel (41) is equipped with second half groove (413), first half groove (423) corresponds with second half groove (413) and forms and holds the elastic mounting space of valve elastic component (43), valve baffle (42) are equipped with first connecting plate (424) in the one end in elastic mounting space, valve barrel (41) are equipped with second connecting plate (414) at the other end in elastic mounting space, valve elastic component (43) are installed in elastic mounting space, and both ends push up respectively on first connecting plate (424) and second connecting plate (414).

7. The drawer cabinet circuit distribution switching device of claim 3, wherein: the bottom side of the valve baffle plate (42) opposite to the valve barrel (41) is provided with a first sliding block (428) and a second barb (427), one end of the valve barrel (41) is correspondingly provided with a first sliding groove (415) and a second sliding groove (416) which are respectively matched with the first sliding block (428) and the second barb (427) along the moving direction of the valve baffle plate (42), one end of the second sliding groove (416) is communicated with a channel in the middle of the valve barrel (41) to install the second barb (427), the second barb (427) comprises a guide strip and a barb positioned at the end part of the guide strip, and the guide strip is in sliding fit with the second sliding groove (416) and is limited by the barb to prevent the valve baffle plate (42) from falling out of the valve barrel (41).

8. The drawer cabinet circuit distribution switching device of claim 2, wherein: the outer side of the shell of the bus box (3) is provided with a cylindrical valve mounting seat (38), and a valve barrel (41) is in clamping fit with the valve mounting seat (38).

9. The drawer cabinet circuit distribution adapter device of claim 8, wherein: a circular first limiting groove (383) is formed in the side edge of the end portion of the valve 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 in the inner side wall, communicated with the first limiting groove (383), of the outer limiting ring (384); 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 in the inner side of the valve barrel; one end of the valve barrel (41) is arranged in the first limiting groove (383), the inner limiting ring (382) on the valve mounting 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 buckling mode.

10. The drawer cabinet circuit distribution switching device of claim 1, wherein: the bus in the bus box (3) comprises an incoming line bus (33) and an outgoing line bus (34), 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 (34) is connected with a cable overlapping row (342).

11. The drawer cabinet circuit distribution switching device of claim 1, 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 slot (329) that clamps the generating line and is used for installing connection 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 connection support seat (327), first partition lug (312) correspond with second partition lug (321) and keep apart adjacent generating line.

12. The drawer cabinet circuit distribution adapter of claim 10, wherein: and an insulating sleeve (324) is arranged at the position of the incoming line bus (33) corresponding to the main incoming line plug-in component (323) connected with the adjacent bus, and/or an insulating sleeve (324) is arranged at the position of the outgoing line bus (34) corresponding to the adjacent bus connecting cable overlapping row (342).

13. The drawer cabinet circuit distribution adapter of claim 10, wherein: and a sealing piece (37) is arranged on the shell of the bus box (3) corresponding to the N-phase valve mounting seat (38), and/or a heat dissipation hole (36) communicated with the outside is formed in the bus box (3).

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