CN220964152U - DC partition switch device - Google Patents

Abstract

The utility model provides a direct current partition switch device which comprises a box body, a socket, a plug, a box body cover hinged on the box body and enclosing a first accommodating space together with the box body, a mounting plate arranged in the first accommodating space, a plastic shell circuit breaker, a miniature circuit breaker and a linkage mechanism, wherein the plastic shell circuit breaker, the miniature circuit breaker and the linkage mechanism are all arranged on the mounting plate, two copper bars are arranged at the end part of the plastic shell circuit breaker, the two sockets are arranged outside the box body and respectively extend to the inside of the box body to be connected with the two copper bars, a connecting socket with the plug capable of being plugged and pulled out is arranged on the plastic shell circuit breaker, a manual operation mechanism is arranged on the outer side of the box body cover, and when the box body cover is in a closed state, the handle can be adjusted to be switched on or off by the manual operation mechanism when the box body cover is rotated. The utility model is convenient for installation and maintenance, the switch operation position is hidden in the box body, the operation is safe and reliable, the operation is simple, and the operation cost and the power-off time are reduced.

Description

DC partition switch device

Technical Field

The utility model relates to the technical field of power transmission and transformation equipment, in particular to a direct-current partition switch device.

Background

The direct current partition switch device is widely applied to a traction power grid of underground mining and ground electric locomotives, and is used as a traction line segment connection switch for manually switching on and off a power supply. However, the existing direct current partition switch of the general overhead line locomotive for mines has the defects of complex operation, inconvenient maintenance, exposed switch operation position and the like. Therefore, a new structure is needed to solve the above problems.

Disclosure of utility model

In view of the drawbacks of the prior art, an object of the present utility model is to provide a direct current partition switch device.

The utility model provides a direct current partition switch device which comprises a box body, a socket, a plug, a box body cover hinged on the box body and enclosing a first accommodating space together with the box body, and a mounting plate, a molded case circuit breaker, a miniature circuit breaker and a interlocking mechanism which are arranged in the first accommodating space;

The mounting plate is arranged on the box body, the plastic shell circuit breaker, the miniature circuit breaker and the interlocking mechanism are all arranged on the mounting plate, two copper bars are arranged at the end part of the plastic shell circuit breaker, two sockets are arranged outside the box body and respectively extend to the interior of the box body to be connected with the two copper bars, the plug is connected with the sockets in a pluggable manner, and the plastic shell circuit breaker and the miniature circuit breaker are respectively connected with the interlocking mechanism;

The manual operation mechanism is arranged on the molded case circuit breaker, the handle is arranged on the outer side of the case cover, and when the case cover is in a closed state, the handle is rotated, and the molded case circuit breaker can be adjusted to a closing state or a breaking state through the manual operation mechanism.

Preferably, the socket is provided with a waterproof pad so that a connection portion itself with the case is in a sealed state.

Preferably, a power indicator, a closing indicator and a breaking indicator are arranged outside the box cover, and the power indicator, the closing indicator and the breaking indicator are respectively and electrically connected with the molded case circuit breaker.

Preferably, a square shaft is arranged on the manual operation mechanism, a square shaft sleeve is arranged on the inner side of the box cover, and the handle is in running fit with the square shaft sleeve;

When the box cover is in a closed state, the end part of the square shaft extends into the square shaft sleeve, so that the square shaft sleeve can drive the square shaft to rotate when the handle is rotated, and the molded case circuit breaker can be adjusted to a closing state or a breaking state.

Preferably, the end of the socket is provided with a socket copper part matched with the copper bar and is locked by a mounting nut sleeved on the socket copper part.

Preferably, the socket comprises a socket limiting shaft, a first spring and an insulating sleeve, one end of the socket copper piece is connected with the copper bar, the other end of the socket copper piece is provided with an opening, a step structure is arranged in the opening, the first spring is assembled into the socket copper piece through the opening and is squeezed by a movable cap positioned on the step structure, the insulating sleeve is sleeved outside the socket copper piece, and the socket limiting shaft is arranged outside the insulating sleeve.

Preferably, one end of the movable cap, which faces the first spring, is provided with a movable cap boss extending radially outwards and one or more shrinkage grooves arranged at intervals, the movable cap is extruded when the movable cap passes through the opening so that the shrinkage grooves are narrowed until the movable cap boss reaches the step structure and is buckled on the step structure, and at the moment, the shrinkage grooves of the movable cap are widened under the action of self elastic restoring force.

Preferably, the plug is matched with the socket, and comprises a plastic cap, an insulating piece, a plug copper piece and a plug limiting shaft;

The cable is characterized in that one end of the plug copper piece is provided with a plastic cap, the other end of the plug copper piece is provided with a cable accommodating opening, the insulating piece is sleeved outside the plug copper piece and is fixed through a plug limiting shaft, the end part of the insulating piece is provided with a cable channel, and the end part of the cable passes through the cable channel and extends into the cable accommodating opening and is fixed through a fastener arranged in the circumferential direction of the plug copper piece;

A first plug sealing ring is arranged between the insulating piece and the plug copper piece, and the end part of the insulating piece is provided with a plug limiting piece and a second plug sealing piece positioned in the cable accommodating port.

Preferably, a clamping block is arranged outside the insulating piece, a notch is arranged at the end part of the insulating piece, a limit bump is arranged on the inner wall of the insulating piece, a plug contact is arranged on the outer wall of the plug copper piece, a spring pin, an axial guide groove and a radial guide groove which can be used for guiding the limit bump to slide during assembly are arranged on the outer wall of the insulating sleeve, a socket contact is arranged on the inner wall of the socket copper piece, when the plug is inserted into the root part of the socket, the spring pin is extruded and compressed back to the inside of the insulating sleeve by the end part of the insulating piece, at the moment, when the plug is twisted relative to the socket, the limit bump slides along the radial guide groove and can enable the notch to be opposite to the spring pin, the spring pin can spring out and be inserted into the notch under the action of self-elastic force, and the plug is locked and kept on the socket, and at the moment, the socket contact is contacted with the plug contact;

When the clamping block is pushed towards the direction of the spring pin, the clamping block pushes the spring pin to leave the notch, and at the moment, the plug is twisted to the first position from the second position, and the spring pin moves towards the direction of the plug, so that the plug is allowed to leave the socket.

Preferably, there is also at least one structural arrangement of:

the A phase and the C phase in the molded case circuit breaker are arranged in series;

the box body is made of waterproof materials;

and a sealing gasket is arranged between the box body and the box body cover.

Compared with the prior art, the utility model has the following beneficial effects:

According to the utility model, through the characteristics that the pluggable socket and plug structure is designed, the manual operation mechanism is designed, and the like, the switch is convenient to install and maintain, the switch operation position is hidden in the box body, and the device is safe and reliable, is simple to operate, and reduces the operation cost and the power-off time.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of the structure of the inside of a case when the case cover of the present utility model is opened;

FIG. 2 is a schematic view of the structure of the inside of the case when the case cover of the present utility model is closed;

FIG. 3 is a schematic view of a socket;

FIG. 4 is a schematic cross-sectional view of a socket;

FIG. 5 is a schematic view of a plug;

FIG. 6 is a schematic cross-sectional view of a plug;

FIG. 7 is a schematic diagram of the control principle of the present utility model;

Fig. 8 is a schematic structural view of the latch and the latch block.

The figure shows:

box body 1

Sealing gasket 2

Mounting plate 3

Plastic case breakers 4

Miniature circuit breaker 5

Square shaft 6

Manual operation mechanism 7

Copper bar 8

Socket 9

Plug 10

Clamping block 11

Sliding shaft 111

Grounding pile 12

Square shaft sleeve 13 interlocking mechanism 14 power supply indicator lamp 15 switch-on indicator lamp 16 switch-off indicator lamp 17 lock 18

Handle 19

Case cover 20

The first accommodating space 21 is provided with a step structure 1011 of the socket copper part 101, a first positioning groove 1013 and a second positioning groove 1014 of the socket contact 1012, a mounting nut 102, a socket sealing ring 103, a socket limiting shaft 104, a first spring 105, an insulating sleeve sealing ring 106, an insulating sleeve 107, an axial guiding groove 1071 and a spring pin 1072, and a radial guiding groove 1073

Second accommodation space 1074

Removable cap 108

Shrink groove 1081

End groove 1082

Movable cap boss 1083

Second spring 109

Plastic cap 201

Insulating member 202

Cable channel 2021

Recess 2022

Spacing bump 2023

Limiting shaft hole 2024

Plug copper piece 203

Cable receiving port 2031

Plug contact 2032

First plug boss 2033

Second plug boss 2034

Plug spacing shaft 204

First plug seal 205

First inlay bolt 206

Second inlay screw 207

Plug spacing member 208

Second plug seal 209

Third spring 210

Detailed Description

The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.

The utility model provides a direct current partition switch device, as shown in fig. 1 and 2, which comprises a box body 1, a socket 9, a box body cover 20, a mounting plate 3, a plastic shell breaker 4, a miniature breaker 5 and a interlocking mechanism 14, wherein one side of the box body cover 20 is hinged on the box body 1 and encloses a first accommodating space 21 together with the box body 1, the box body 1 is made of high-quality explosion-proof and waterproof materials, a grounding pile 12 is arranged on the box body 1, and a sealing gasket 2 is arranged between the box body 1 and the box body cover 20 to prevent water stains and dust from entering, so that the waterproof and dustproof performances are more reliable.

The mounting plate 3, the molded case circuit breaker 4, the miniature circuit breaker 5 and the interlocking mechanism 14 are all arranged in the first accommodating space 21, the mounting plate 3 is arranged on the box body 1, the molded case circuit breaker 4, the miniature circuit breaker 5 and the interlocking mechanism 14 are all arranged on the mounting plate 3, the A phase and the C phase inside the molded case circuit breaker 4 are arranged in series, as shown by Q1 in fig. 7, the wiring mode realizes double-breakpoint control, the sectioning capability of the molded case circuit breaker 4 is doubled, and the arc extinguishing effect is better. The end of the molded case circuit breaker 4 is provided with two copper bars 8, two sockets 9 are arranged outside the box body 1 and respectively extend to the two copper bars 8 of the internal connection of the box body 1, 2 sockets 9 are installed from the bottom of the box body 1 and fixed on the box body 1, the sockets 9 are provided with waterproof pads so that the connection part of the sockets 9 and the box body 1 is in a sealing state, and the end of each socket 9 is provided with a socket copper piece 101 matched with the copper bar 8 and is locked in a sleeved mode through a mounting nut 102 sleeved on the socket copper piece 101.

The outside of box lid 20 is provided with power indicator 15, switch on pilot lamp 16, separating brake pilot lamp 17, and power indicator 15, switch on pilot lamp 16, separating brake pilot lamp 17 are connected with moulded case circuit breaker 4 electricity respectively, specifically, as shown in fig. 7, PW stands for power indicator 15, HG stands for switch on pilot lamp 16, FG stands for separating brake pilot lamp 17, is used for controlling through miniature circuit breaker 5, specifically controls through Q2, makes the running state of box 1 clear at a glance.

The plastic-case circuit breaker 4 is provided with a manual operation mechanism 7, the manual operation mechanism 7 is provided with a square shaft 6, the inner side and the outer side of the box cover 20 are respectively provided with a square shaft sleeve 13 and a handle 19, and the handle 19 is in rotary fit with the square shaft sleeve 13; when the box cover 20 is in a closed state, the end part of the square shaft 6 extends into the square shaft sleeve 13, so that the square shaft 6 can be driven to rotate by Fang Zhoutao when the handle 19 is rotated, and the molded case circuit breaker 4 is adjusted to a closing state or a breaking state, that is, when the box cover 20 is tightly closed, the square shaft 6 is inserted into the square shaft sleeve 13, the square shaft sleeve 13 is connected with the handle 19, and the closing and breaking of the molded case circuit breaker 4 can be controlled by the handle 19, so that the operation is convenient, safe and quick. In order to increase the stability of the closed box cover 20, the box cover 20 is provided with a lock 18, and the closed box cover 20 can lock the box cover 20 through the lock 18, so that the box cover 20 can be stably in a closed state.

Specifically, the molded case circuit breaker 4 and the miniature circuit breaker 5 are respectively connected with the interlocking mechanism 14, as shown in fig. 7, S1 represents the interlocking mechanism 14, Q1 represents the molded case circuit breaker 4, Q3 represents the miniature circuit breaker 5, and the interlocking mechanism 14 is used for limiting the closing and opening of the molded case circuit breaker 4 and the miniature circuit breaker 5, so that only one of Q1 and Q3 can be in a closing state, and the operation of the box body 1 is safer and more reliable.

As shown in fig. 3 and 4, the socket 9 includes a socket limiting shaft 104, a first spring 105 and an insulating sleeve 107, one end of the socket copper part 101 is connected with the copper bar 8, the other end of the socket copper part 101 is opened, a step structure 1011 is arranged in the opening, the first spring 105 is assembled into the interior of the socket copper part 101 through the opening, the insulating sleeve 107 is sleeved on the exterior of the socket copper part 101 through a movable cap 108 positioned on the step structure 1011, the socket limiting shaft 104 is configured on the exterior of the insulating sleeve 107, one end of the movable cap 108, which faces the first spring 105, is provided with a movable cap boss 1083 extending outwards in a radial direction and one or more shrinkage grooves 1081 arranged at intervals, when the movable cap 108 passes through the opening, as the movable cap 108 is provided with the movable cap boss 1083, the outer diameter of the end is larger than the inner diameter of the opening, so that the movable cap 108 is extruded when passing through the opening, the shrinkage groove 1081 becomes smaller until the movable cap boss 1083 reaches the step structure 1011, the movable cap 108 widens under the effect of self elastic restoring force of the shrinkage groove 1083, and the movable cap boss 1083 is buckled on the step structure 108 and is fixed under the effect of the first spring 1011. When the movable cap 108 enters the step structure 1011 and then automatically opens, the buckle is blocked at the step structure 1011 and cannot be separated, a sealing groove is arranged in the circumferential direction of the socket copper part 101, a socket sealing ring 103 is arranged in the sealing groove and is arranged in the insulating sleeve 107, and the limiting shaft 104 is in interference fit and penetrates the whole socket 9, so that the socket copper part 101 and the insulating sleeve 107 are more firmly fixed; because the socket sealing ring 103 is arranged, the socket copper piece 101 and the insulating sleeve 107 are sealed, water and air cannot enter, and the safety and the reliability are realized; due to the installation of the movable cap 108, all insulation treatment is performed around the socket 9, contact is prevented, and safety is higher.

The utility model also comprises a plug 10, wherein the plug 10 is matched with the socket 9, the plug 10 comprises a plastic cap 201, an insulating piece 202, a plug copper piece 203 and a plug limiting shaft 204, one end of the plug copper piece 203 is provided with the plastic cap 201, the other end is provided with a cable containing port 2031, the insulating piece 202 is sleeved outside the plug copper piece 203 and fixedly connected with the plug copper piece 203 through the plug limiting shaft 204, and the insulating piece 202 is provided with a limiting shaft hole 2024 for inserting the plug limiting shaft 204. The end of the insulator 202 has a cable passage 2021, and when the cable is assembled, the plug copper member 203 is taken out, the end of the cable passes through the cable passage 2021 and then extends into the cable receiving port 2031, the circumferential direction of the plug copper member 203 is provided with a fastener, and the cable located in the cable receiving port 2031 can be fixed by the fastener arranged in the circumferential direction of the plug copper member 203, so that the connection of the cable is firmer, and the fastener preferably comprises a first insert bolt 206 and a second insert bolt 207.

After the plug copper piece 203 is arranged in the insulating piece 202, the plug limiting shaft 204 is inserted into the holes of the plug copper piece 203 and the insulating piece 202 in an interference fit manner, the fixing is more reliable, meanwhile, a first plug sealing ring 205 is arranged between the insulating piece 202 and the plug copper piece 203 to prevent water stains and dust from entering, so that the waterproof and dustproof performances of the plug are more reliable, the end part of the insulating piece 202 is provided with a plug limiting piece 208 and a second plug sealing piece 209 positioned in the cable accommodating port 2031, the end part of the plug copper piece 203 is inlaid with a plastic cap 201, all insulation treatment is realized around the socket, the contact is prevented, and the safety type of the socket is higher.

Further, the insulating member 202 is provided with a block 11 on the outside, a recess 2022 is provided at the end and a limit bump 2023 is provided on the inner wall, a plug contact 2032 is provided on the outer wall of the plug copper member 203, a spring pin 1072 is provided on the outer wall of the insulating sleeve 107, an axial guide groove 1071 for guiding the limit bump 2023 to slide during assembly, a radial guide groove 1073 is provided on the radial guide groove 1071, a socket contact 1012 is provided on the inner wall of the socket copper member 101, when the plug 10 is inserted into the root of the socket 9, the spring pin 1072 is pressed back into the inside of the insulating sleeve 107 by the end of the insulating member 202, at this time, the torsion plug 10 rotates from the first position to the second position relative to the socket 9, the limit bump 2023 slides along the radial guide groove 1073 and enables the recess 2022 to spring pin 1072 and thus the spring pin 1072 to spring out under the self-elastic force and insert into the inside of the recess 2022, at this time, the plug 10 is locked and held on the socket 9, and the socket contact 2032 contacts.

It should be noted that, when the plug 10 is plugged, only the limit bump 2023 is aligned with the axial guide slot 1071 on the socket 9, and the plug 10 is plugged, while the plastic cap 201 is pushed against the end groove 1082 of the movable cap 108 to move inward, the first spring 105 is compressed and shortened, so that the movable cap 108 moves a distance toward the inside of the socket copper 101 until the plug 10 is plugged into the root of the socket 9, at this time, the plug contact 2032 of the plug copper 203 is in transition fit connection with the socket contact 1012 of the socket copper 101, at this time, the spring 1072 is just pressed and contracted, then the plug 10 can be twisted to rotate clockwise for 45 °, the spring 1072 on the socket 9 pops into the notch 2022, at this time, the limit bump 2023 on the plug 10 just snaps into the radial guide slot 1073, at the same time, the first plug boss 2033 and the second plug boss 2034 are also provided on the plug copper 203, at the same time, the first positioning groove 1013 and the second positioning groove 1014 are provided on the socket copper 101, at this time, the first plug boss 2033 and the second plug boss 2034 are respectively rotated to be positioned in a stable manner, and the plug 1014 is designed to be just pulled out from the positioning groove and stable.

Further, when the latch 11 is pushed toward the latch 1072, the latch 1072 is pushed out of the recess 2022, at which time the plug 10 is twisted from the second position to the first position and the latch 11 is released, the latch 1072 moves toward the plug 10, and the plug 10 is allowed to leave the socket 9. Specifically, when the plug 10 needs to be pulled out, the latch 11 is pushed up, the latch 11 abuts against the spring pin 1072 to enable the spring pin 1072 to leave the notch 2022, and at this time, the plug 10 is twisted to enable the plug 10 to be turned back to the first position from the second position, so that the plug 10 is pulled out more easily due to the thrust of the first spring 105.

The exterior of the insulating sleeve 107 also has an insulating sleeve groove in which an insulating sleeve sealing ring 106 is arranged, the insulating member 202 and the insulating sleeve 107 being previously brought into sealing engagement by means of the insulating sleeve sealing ring 106 when the plug 10 is inserted into the socket 9.

Specifically, a second accommodating space 1074 is provided in the insulating sleeve 107, a second spring 109 is provided at one end in the second accommodating space 1074, one end of the spring 1072 is disposed at the other end in the second accommodating space 1074 and is elastically matched with the second spring 109, the other end of the spring 1072 extends to the outside of the insulating sleeve 107, wherein the outer diameter of the middle part of the spring 1072 is larger than two ends, on one hand, the spring 107can abut against the second spring 109, on the other hand, limiting can be performed so that one end of the spring 1072 of the insulating sleeve 107 is limited in the second accommodating space 1074, the other end of the spring 1072 slidably extends to the outside of the insulating sleeve 107, as shown in fig. 8, a slidable clamping block 11 is provided on the outer part of the insulating member 20, a sliding shaft 111 is provided on the clamping block 11, a sliding hole is provided on the insulating member 20, the end of the sliding shaft 111 is located in the sliding hole, a third spring 210 is sleeved on the sliding shaft 111, the third spring 210 is located between the sliding hole and the root of the sliding shaft 111, the clamping block 11 can slide between a third position and a fourth position, on the other hand, on the natural state, the elastic force of the third spring 210 can limit one end of the spring 1072 is limited in the second accommodating space 1074, the other end of the insulating sleeve is slidably extends to the outside of the insulating sleeve 107, and the other end face of the insulating sleeve 107 is slidably, as shown in fig. 8, and the end face 10 is slidably opposite to the third position 10 is pushed by the sliding sleeve 10.

In actual use, a user can install the direct current partition switch device at a proper position of a mine, when the switch device needs to be replaced or maintained, the plug 10 is only required to be pulled out of the box body 1, and the plug is reinserted after the replacement or maintenance is completed, so that the direct current partition switch device has the characteristics of safety, reliability and convenience, and has important practical value.

The utility model adopts the box body structure and the plug-in structure which are manufactured by waterproof and dustproof designs, the safe operation of equipment is ensured by the dustproof and waterproof, the quick plug-in connector has higher connection reliability, the operation stability of the equipment is improved, the whole structure is compact, the design is ingenious, the occupied space is small, and the utility model is suitable for being used in the limited space of a mine.

The working principle of the utility model is as follows:

As shown in fig. 1 to 7, the manual operation mechanism 7 is fixed on the molded case circuit breaker 4, the miniature circuit breaker 5 and the interlocking mechanism 14 are installed on the mounting plate 3, the mounting plate 3 is fixed in the box body 1, the box body 1 is made of high-quality explosion-proof and waterproof materials, the molded case circuit breaker 4 is equivalent to the Q1 in fig. 7, the A phase and the C phase of the molded case circuit breaker 4 are connected in series, the double-breakpoint control is realized by the wiring mode, the segmentation capability of the molded case circuit breaker 4 is doubled, and the arc extinguishing effect is better. The wire outlet end of the plastic shell breaker 4 is positioned at the lower part, 2 copper bars 8 are fixed at the wire outlet end, 2 sockets 9 are installed from the bottom of the box body 1 and fixed on the box body 1, and the sockets 9 are provided with waterproof pads, so that the box body 1 is sealed more reliably; the socket copper piece 101 of the socket 9 is inserted into the copper bar 8 and is fixed by the mounting nut 102; the power indicator lamp 15 (PW), the closing indicator lamp 16 (HG), and the opening indicator lamp 17 (FG) are mounted on the case cover 20, and are controlled by the micro breaker 5, and Q2 in fig. 7 corresponds to the micro breaker 5, so that the operation state of the case 1 is clear at a glance; the square shaft 6 is fixed on the manual operation mechanism 7, when the box body 1 is tightly closed, the square shaft 6 is inserted into Fang Zhoutao, the square shaft sleeve 13 is connected with the handle 19, and the closing and opening of the molded case circuit breaker 4 are controlled by the handle 19, so that the operation is convenient, safe and quick; s1 in FIG. 7 is equivalent to a linkage mechanism 14, and the linkage mechanism 14 is used for limiting the closing and opening of the molded case circuit breaker 4 (Q1) and the miniature circuit breaker 5 (Q3), so that only one of the Q1 and the Q3 can be in a closing state, and the box body 1 can run more safely and reliably; the sealing gasket 2 is fixed between the body of the box body 1 and the box body cover 20, so that water stains and dust are prevented from entering, and the waterproof and dustproof performances are more reliable.

In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the utility model and the features of the embodiments may be combined with each other arbitrarily without conflict.

Claims (10)

1. The direct current partition switch device is characterized by comprising a box body (1), a socket (9), a plug (10), a box body cover (20) hinged on the box body (1) and enclosing a first accommodating space (21) together with the box body (1), and a mounting plate (3), a molded case circuit breaker (4), a miniature circuit breaker (5) and a interlocking mechanism (14) which are arranged in the first accommodating space (21);

The mounting plate (3) is arranged on the box body (1), the plastic shell circuit breaker (4), the miniature circuit breaker (5) and the interlocking mechanism (14) are all arranged on the mounting plate (3), two copper bars (8) are arranged at the end part of the plastic shell circuit breaker (4), two sockets (9) are arranged outside the box body (1) and respectively extend to the two copper bars (8) of the internal connection of the box body (1), the plug (10) is connected with the sockets (9) in a pluggable manner, and the plastic shell circuit breaker (4) and the miniature circuit breaker (5) are respectively connected with the interlocking mechanism (14);

the plastic-case circuit breaker (4) is provided with a manual operation mechanism (7), the outer side of the case cover (20) is provided with a handle (19), and when the case cover (20) is in a closed state, the handle (19) is rotated, the plastic-case circuit breaker (4) can be adjusted to a closing state or a breaking state through the manual operation mechanism (7).

2. Direct current partition switch device according to claim 1, characterized in that the socket (9) is provided with a waterproof pad so that the connection site itself with the box (1) is in a sealed state.

3. The direct current partition switch device according to claim 1, wherein a power indicator lamp (15), a closing indicator lamp (16) and a breaking indicator lamp (17) are arranged outside the box cover (20), and the power indicator lamp (15), the closing indicator lamp (16) and the breaking indicator lamp (17) are respectively electrically connected with the molded case circuit breaker (4).

4. A direct current partition switch device according to claim 3, characterized in that the manual mechanism (7) is provided with a square shaft (6), the inner side of the box cover (20) is provided with a square shaft sleeve (13), and the handle (19) is in running fit with the square shaft sleeve (13);

When the box cover (20) is in a closed state, the end part of the square shaft (6) extends into the square shaft sleeve (13) so that the square shaft (6) can be driven to rotate through the square shaft sleeve (13) when the handle (19) is rotated, and then the molded case circuit breaker (4) is adjusted to a closing state or a breaking state.

5. Direct current block switching device according to claim 1, characterized in that the end of the socket (9) has a socket copper part (101) matching the copper bar (8) and is locked by means of a mounting nut (102) fitted over the socket copper part (101).

6. The direct current partition switch device according to claim 5, wherein the socket (9) comprises a socket limiting shaft (104), a first spring (105) and an insulating sleeve (107), one end of the socket copper piece (101) is connected with the copper bar (8), the other end of the socket copper piece (101) is an opening, a step structure (1011) is arranged in the opening, the first spring (105) is assembled into the socket copper piece (101) through the opening and is squeezed by a movable cap (108) positioned on the step structure (1011), the insulating sleeve (107) is sleeved outside the socket copper piece (101), and the socket limiting shaft (104) is configured outside the insulating sleeve (107).

7. The direct current partition switch apparatus according to claim 6, wherein one end of the movable cap (108) facing the first spring (105) is provided with a movable cap boss (1083) extending radially outwardly and one or more shrinkage grooves (1081) arranged at intervals, the movable cap (108) being pressed when the movable cap (108) passes through the opening such that the shrinkage grooves (1081) are narrowed until the movable cap boss (1083) reaches the step structure (1011), whereupon the movable cap (108) is snapped onto the step structure (1011) under the action of its own elastic restoring force, the shrinkage grooves (1081) being widened.

8. The direct current sectionalizing switching device according to claim 7, wherein the plug (10) comprises a plastic cap (201), an insulator (202), a plug copper (203), and a plug limit shaft (204);

one end of the plug copper piece (203) is provided with a plastic cap (201), the other end of the plug copper piece is provided with a cable accommodating port (2031), the insulating piece (202) is sleeved outside the plug copper piece (203) and is fixed through a plug limiting shaft (204), the end part of the insulating piece (202) is provided with a cable channel (2021), and the end part of a cable passes through the cable channel (2021) and extends into the cable accommodating port (2031) and is fixed through a fastener arranged in the circumferential direction of the plug copper piece (203);

A first plug sealing ring (205) is arranged between the insulating piece (202) and the plug copper piece (203), and a plug limiting piece (208) and a second plug sealing piece (209) which is positioned in the cable containing opening (2031) are arranged at the end part of the insulating piece (202).

9. The direct current sectionalized switching device according to claim 8, wherein the insulating member (202) is provided with a clamping block (11) at the outside, a notch (2022) at the end and a limit bump (2023) at the inside, a plug contact (2032) is provided on the outside wall of the plug copper member (203), a spring pin (1072) and an axial guide groove (1071) and a radial guide groove (1073) for guiding the sliding of the limit bump (2023) at the time of assembly are provided on the outside wall of the insulating member (107), a socket contact (1012) is provided on the inside wall of the socket copper member (101), the spring pin (1072) is pressed back to the inside of the insulating sleeve (107) by the end of the insulating member (202) when the plug (10) is inserted into the root of the socket (9), at this time, the plug (10) is twisted relative to the socket (9) to rotate from a first position to a second position, the limit bump (2023) slides along the radial guide groove (1073) and is enabled to be pushed down against the spring pin (1072) and kept locked by the spring pin (1072) at the inside of the notch (1072) and the inside of the socket (9), -the socket contact (1012) contacts the plug contact (2032);

When the clamping block (11) is pushed towards the spring pin (1072), the clamping block (11) pushes the spring pin (1072) away from the notch (2022), and the plug (10) is twisted from the second position to the first position, and the spring pin (1072) moves towards the plug (10) to allow the plug (10) to leave the socket (9).

10. The direct current block switching device according to claim 1, further comprising at least one of the following structural arrangements:

the A phase and the C phase in the plastic shell circuit breaker (4) are arranged in series;

the box body (1) is made of waterproof materials;

A sealing gasket (2) is arranged between the box body (1) and the box body cover (20).