Hinge-protected main circuit connector for cell compartment incoming lines, and unit assembly

Abstract

A hinge-protected main circuit connector for unit compartment incoming lines, and a unit assembly. The main circuit connector comprises: an insulating housing, the front end of which is provided with a front socket; and a hinge protection structure, which is mounted at the front end of the insulating housing and closes the front socket. When a copper bar of a unit main circuit moving connector is inserted into hinges, the hinges are driven to open; and when the unit main circuit moving connector is withdrawn, the hinges automatically close. The hinge-protected main circuit connector for unit compartment incoming lines is applied to an incoming line side of a unit compartment, thereby enabling the protection level of the unit compartment incoming lines to be improved.

Description

Unit room incoming line hinge-protected main circuit connector and unit assembly Technical Field

[0001] This invention relates to the field of complete switchgear technology, and in particular to a hinge-protected main circuit connector and unit assembly for the incoming line of a unit compartment. Background Technology

[0002] Currently, in pull-out switchgear, the drawer unit uses a main circuit moving plug inserted into the vertical busbar for the unit's incoming line. An IP20 incoming line protection cover needs to be installed on the incoming line side of the unit compartment's rear panel. When the unit is pulled out, the cover's insertion port is not closed. Alternatively, a hinge device is installed on the incoming line side of the unit compartment's rear panel, with a drive component on the unit to open the hinge device, achieving IP40 incoming line protection. However, if a drive component is added to the unit to open the hinge device, mechanical failure can damage the hinge. The applicant has also proposed an IP40 hinge device, as detailed in Chinese patent document CN201360106Y. The main circuit moving plug on the unit, paired with this IP40 hinge device, has an alternating single-line fixed structure. When the unit is pushed into the unit compartment, the hinge device's hinge is opened by the drive component on the unit, and when the unit is withdrawn, the hinge is closed by the drive component.

[0003] Currently, the main circuit connectors used in the drawer units of withdrawable switchgear are unit main circuit moving connectors, while the main circuit connectors installed on the unit compartment are for vertical busbar connection. The IP20 and IP40 protection structures on the incoming side of the unit compartment of withdrawable switchgear are basically limited to the two structures mentioned above, with the hinge device added to the incoming side of the rear panel of the unit compartment. Foreign brands only have two models of switchgear with IP40 hinge devices added to the main incoming end of the withdrawable unit compartment to achieve IP40 protection. Both the unit compartment and the unit itself require drive components, which not only lacks versatility but also results in high application costs for the added hinge devices. IP20 protection for the unit compartment is inexpensive, so users generally do not require drawer units with IP40 protection. Furthermore, even with hinge devices achieving IP40 protection, installation tolerances can lead to occasional malfunctions such as the hinge failing to open when the drawer unit is pushed in, or the hinge breaking.

[0004] The applicant has proposed a main circuit commutation plug, a main circuit connection structure and functional unit, as detailed in Chinese patent document CN214898297U. The main circuit plug for connecting the incoming line to the vertical busbar is a single-phase structure and is fixed on the rear plate of the unit compartment. The phase-to-phase center of the three-phase main circuit plug corresponds to the connection structure in which the phase-to-phase center of the main circuit plug on the drawer unit is consistent with the phase-to-phase center of the circuit breaker. The protection level of the incoming line is IP20.

[0005] How to achieve an IP40 protection level on the incoming side of the unit compartment using the connection structure of the main circuit moving plug phase-to-phase center aligning with the circuit breaker phase-to-phase center in this patent application is a technical problem that urgently needs to be solved in this application technology.

[0006] Because the phase-to-phase center distance of the incoming main circuit connector in this patent application corresponds to the phase-to-phase center distance of the corresponding phase of the unit's main circuit moving connector and circuit breaker, but the phase-to-phase center distances of circuit breakers of different current ratings are different (e.g., 43.7mm, 44mm, 45mm, 46mm, and 58mm for 630A circuit breakers), how to achieve universality of the IP40 protection rating protection structure on the incoming side of the unit compartment is also a problem that this application needs to solve.

[0007] Summary of the Invention

[0008] The technical problem to be solved by the present invention is that existing hinge devices are not universal. In order to overcome this technical problem, a hinge protection main circuit connector and unit assembly for unit room incoming line are provided, so that they have the feasibility and universality of application.

[0009] The technical solution adopted in this invention is: a hinge-protected main circuit connector for unit room incoming lines, comprising:

[0010] An insulating housing, the front end of which has a front insertion port;

[0011] Hinge protection structure, installed at the front end of the insulating shell, seals the front insertion port;

[0012] The hinge protection structure includes:

[0013] The left and right hinges slide open in opposite directions to expose the front insertion port. The front of the adjacent inner sides of the two hinges are outwardly expanding bevels, which are used to cooperate with the head end of the copper busbar of the unit main circuit moving plug. When the copper busbar of the unit main circuit moving plug is inserted, it pushes the left and right hinges to slide open in opposite directions.

[0014] The left and right hinges are mounted on the insulating shell by a sliding guide installation structure, allowing them to be slidably opened and mounted in opposite directions.

[0015] The spring-reset structure is used to push the left and right hinges to reset and close, sealing the front insertion port.

[0016] Furthermore, the translational guide mounting structure includes a guide protrusion on the insulating shell and a guide groove on the back of the hinge. The guide protrusion is embedded in the guide groove to guide the hinge in left and right translation.

[0017] There is also a snap-fit ​​structure between the guide protrusion and the guide groove, which allows the hinge to be snapped onto the guide protrusion through the guide groove for translation.

[0018] Furthermore, both left and right hinges have a matching spring return structure, which is located on the outside of the matching hinge and pushes the matching hinge to move towards the other hinge to achieve reset.

[0019] Furthermore, the spring reset structure includes a reset spring and spring mounting adapter structures located on the hinge and the insulating shell respectively. The reset spring is mounted via the spring mounting adapter structures located on the hinge and the insulating shell respectively.

[0020] Furthermore, the guide protrusion includes an upper guide rail, a spring mounting protrusion as a spring mounting adapter structure, and a lower guide rail. The upper and lower guide rails are located on the upper and lower sides of the spring mounting protrusion. The guide slide on the back of the hinge includes an upper slide groove, a spring mounting slide groove as a spring mounting adapter structure, and a lower slide groove. The upper guide rail is embedded in the upper slide groove, and the lower guide rail is embedded in the lower slide groove. There is a snap-fit ​​structure between the upper guide rail and the upper slide groove, and there is a snap-fit ​​structure between the lower guide rail and the lower slide groove. The spring mounting protrusion is embedded in the spring mounting slide groove, and the reset spring is installed in the cavity of the spring mounting protrusion and the spring mounting slide groove.

[0021] Furthermore, the guide protrusion includes a spring mounting groove as a spring mounting adapter structure, and the guide slide on the back of the hinge includes a spring mounting slide as a spring mounting adapter structure. There is a snap-fit ​​structure between the upper groove frame of the spring mounting protrusion and the upper groove wall of the spring mounting slide, and there is a snap-fit ​​structure between the lower groove frame of the spring mounting protrusion and the lower groove wall of the spring mounting slide. The spring mounting protrusion is embedded in the spring mounting slide, and the reset spring is installed in the groove cavity of the spring mounting protrusion and the spring mounting slide.

[0022] Furthermore, the hinge is a shell structure that is closed on the front and open on the back. The insulating shell covered by the hinge has a limiting protrusion, which cooperates with the limiting engagement structure on the back of the hinge to limit the reset endpoint position of the hinge.

[0023] Furthermore, the limiting protrusion is embedded in the shell cavity on the back of the hinge, and cooperates with the inner wall of the outer side of the hinge, which is a limiting engagement structure, to limit the reset endpoint position of the hinge.

[0024] Furthermore, the spring mounting groove has a spring mounting protrusion inside its cavity, and a spring mounting hole inside the spring mounting protrusion. The inner end of the reset spring is inserted into the spring mounting hole. The spring mounting groove has a limiting protrusion, and the spring mounting protrusion also has a limiting protrusion as a limiting fit structure. The limiting protrusion in the spring mounting groove and the limiting protrusion on the spring mounting protrusion on the back of the hinge cooperate to limit the reset endpoint position of the hinge.

[0025] Furthermore, each hinge is equipped with one return spring; or, each hinge is equipped with two or more return springs arranged side by side, and the spring mounting groove cavity is equipped with a corresponding number of spring mounting protrusions, or the spring mounting groove cavity is equipped with one spring mounting protrusion, and the spring mounting protrusion has a corresponding number of spring mounting holes.

[0026] Furthermore, it also includes a conductive plug, which is installed in the inner cavity of the insulating shell. The rear end of the insulating shell has a rear insertion port, and the insulating shell is divided into a front shell on the front side and a rear shell on the rear side.

[0027] Furthermore, a notch is provided between the mating surfaces of the two hinges, and the notch corresponds to the conductive plug in the inner cavity of the insulating shell.

[0028] A unit assembly includes a unit compartment and a unit. The unit compartment is equipped with an incoming main circuit connector for connecting to a vertical busbar. The incoming main circuit connector is the aforementioned unit compartment incoming hinge-protected main circuit connector. The front socket and hinge protection structure of the unit compartment incoming hinge-protected main circuit connector are located inside the unit compartment.

[0029] Furthermore, the unit has a unit main circuit moving plug, and the rear end of the insulating shell of the unit main circuit moving plug has a relief groove recessed into the front side of the unit rear plate. When the unit main circuit moving plug is inserted into the unit chamber inlet hinge-protected main circuit connector, the unit chamber inlet hinge-protected main circuit connector is positioned so that the protruding part of the front end of the unit chamber inlet hinge-protected main circuit connector that extends beyond the unit rear plate is embedded in the relief groove.

[0030] Compared with the prior art, the present invention has the following advantages: the hinge of the hinge protection structure is opened by inserting the unit main circuit moving plug. When the unit is pushed in, the beveled end of the copper busbar of the unit main circuit moving plug mates with the beveled end of the hinge to open the hinge and connect the unit chamber inlet line hinge protection type main circuit connector, realizing the plug-in connection of the unit main circuit moving plug; when the unit is withdrawn, the plug bar of the unit main circuit moving plug is pulled out, the hinge automatically closes, and the hinge protection structure of the unit chamber inlet line hinge protection type main circuit connector maintains IP40 protection. The unit chamber inlet line hinge protection type main circuit connector of the present invention does not require the addition of a driving component, thus preventing mechanical failure and damage to the hinge.

[0031] The connection structure of the hinge-protected main circuit connector for unit room incoming lines of this invention, which corresponds to the phase-to-phase center of the unit main circuit moving plug and the corresponding phase of the circuit breaker, remains unchanged. This solves the problem of feasibility and universality in the application of main circuits without overlapping connection structures caused by inconsistent phase-to-phase center sizes of circuit breakers. Applying this hinge-protected main circuit connector for unit room incoming lines to the incoming line side of a unit room ensures that the unit room incoming line protection level meets the high standard of IP40.

[0032] The main circuit connectors for this incoming line use hinges with current ratings of 125A, 250A, 400A, and 630A. This hinge structure is applicable regardless of the current rating of the main circuit connectors, the current rating of the circuit breaker, or the phase-to-phase centering discrepancies. It is unrestricted, achieving a seamless, lap-free connection structure for the main circuit, ensuring versatility and feasibility, and raising the unit's protection rating from IP20 to IP40. Attached Figure Description

[0033] Figure 1 is a schematic diagram of the structure of the present invention;

[0034] Figure 2 is a structural schematic diagram of the hinge protection structure of the present invention;

[0035] Figure 3 is a schematic diagram of the hinge structure of the present invention;

[0036] Figure 4 is a structural schematic diagram of the present invention from another angle;

[0037] Figure 5 is a cross-sectional view along direction AA in Figure 4 of this invention;

[0038] Figure 6 is a cross-sectional view along the BB direction in Figure 4 of this invention;

[0039] Figure 7a is a structural schematic diagram of the present invention when used in a 125A circuit breaker (corresponding to a 3*20mm copper busbar for the moving plug) / a 250A circuit breaker (corresponding to a 5*20mm copper busbar for the moving plug);

[0040] Figure 7b is a structural schematic diagram of the present invention when used in a 400A circuit breaker (corresponding to a 6*30mm copper busbar for the moving plug);

[0041] Figure 7c is a structural schematic diagram of the present invention when used in a 630A circuit breaker (corresponding to a moving plug 8*30mm copper busbar / 8*35mm copper busbar);

[0042] Figure 7d is a structural schematic diagram of the present invention when used in a 630A circuit breaker (corresponding to a 6*40mm copper busbar for the moving plug);

[0043] Figure 8a is a schematic diagram of the main circuit dynamic plug-in of the corresponding unit in Figure 7a of the present invention;

[0044] Figure 8b is a schematic diagram of the structure of the main circuit dynamic plug-in of the corresponding unit in Figure 7b of the present invention;

[0045] Figure 8c is a schematic diagram of the main circuit dynamic plug-in of the corresponding unit in Figure 7c of the present invention;

[0046] Figure 8d is a schematic diagram of the main circuit dynamic plug-in of the corresponding unit in Figure 7d of the present invention;

[0047] Figure 9a is a schematic diagram of the main circuit connector of the unit and the hinge-protected main circuit connector for the incoming line of the unit chamber in the separated position of the present invention.

[0048] Figure 9b is a structural schematic diagram of the main circuit connector of the unit and the hinge-protected main circuit connector for the incoming line of the unit chamber of the present invention in the initial position of opening the hinge.

[0049] Figure 9c is a schematic diagram of the structure of the main circuit connector of the unit and the hinge-protected main circuit connector for the incoming line of the unit chamber in the present invention during the hinge opening process.

[0050] Figure 9d is a structural schematic diagram of the connection position of the unit main circuit moving plug and the unit chamber incoming line protective type main circuit connector of the present invention.

[0051] Figures 10a-10d are rear views of the drawer unit with the fixed movable insert of the present invention;

[0052] Figures 11a-11d are schematic diagrams of the structure of the unit compartment of the present invention, which is fixed with a hinge-protected main circuit connector for unit compartment incoming line;

[0053] Figures 12a-12c are schematic diagrams of the structure of the unit main circuit moving plug of the present invention, in which the unit circuit breaker connecting busbar is used as the unit main circuit moving plug.

[0054] Figures 13a-13d are schematic diagrams of the drawer unit assembly for power distribution circuits according to the present invention;

[0055] Figures 14a and 14b are schematic diagrams of the drawer unit assembly for the control loop of the present invention;

[0056] Figure 15 is a structural schematic diagram of Embodiment 3 of the present invention;

[0057] Figure 16 is a schematic diagram of the hinge protection structure in Embodiment 3 of the present invention;

[0058] Figure 17 is a schematic diagram of the hinge structure in Embodiment 3 of the present invention;

[0059] Figure 18 is a schematic diagram of the hinge protection structure in Embodiment 3 of the present invention.

[0060] Numbering on the map:

[0061] 1-Insulating outer shell, 11-Front shell, 111-Front socket, 112-Limiting protrusion, 12-Rear shell, 121-Rear socket, 13-Conductive plug;

[0062] 2-Hinge protection structure, 21-Hinge, 211-Notch, 22-Transfer guide installation structure, 221-Guide protrusion, 2211-Upper guide rail, 2212-Lower guide rail, 222-Guide slide groove, 2221-Upper slide groove, 2222-Lower slide groove, 223-Snap-on structure, 23-Spring return structure, 231-Return spring, 232-Spring mounting protrusion, 233-Spring mounting slide groove, 234-Spring mounting protrusion, 235-Spring mounting hole;

[0063] 3-Unit, 31-Unit main circuit moving plug, 311-Circuit breaker connection bar, 312-Leaning groove, 32-Unit back plate;

[0064] 4-Unit compartment; 41-Rear panel of unit compartment; 42-Vertical busbar. Detailed Implementation

[0065] The embodiments of the present invention are described in detail below. The embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0066] Example 1

[0067] As shown in Figures 1-6, a hinged protective main circuit connector for unit room incoming lines includes:

[0068] An insulating housing 1, the front end of which has a front insertion port 111;

[0069] Hinge protection structure 2 is installed at the front end of the insulating shell 1 and closes the front insertion port 111;

[0070] Hinge protection structure 2 includes:

[0071] The left and right hinges 21 are opened by sliding back and forth to expose the front insertion port 111. The front of the adjacent inner sides of the two hinges 21 is an outwardly expanding bevel, which is used to cooperate with the head end of the copper busbar of the unit main circuit moving plug. When the copper busbar of the unit main circuit moving plug is inserted, it pushes the left and right hinges 21 to slide back and forth to open.

[0072] The translational guide mounting structure 22 allows the left and right hinges 21 to be slidably and openably mounted on the insulating housing 1.

[0073] The spring reset structure 23 is used to push the left and right hinges 21 to reset and close, sealing the front insertion port 111.

[0074] The translational guide mounting structure 22 includes a guide protrusion 221 on the insulating housing 1 and a guide groove 222 on the back of the hinge 21. The guide protrusion 221 is embedded in the guide groove 222 to guide the hinge 21 to translate left and right.

[0075] A snap-fit ​​structure 223 is also provided between the guide protrusion 221 and the guide groove 222, which is used to allow the hinge 21 to be snapped onto the guide protrusion 221 through the guide groove 222 for translation.

[0076] Both left and right hinges 21 have a matching spring return structure 23. The spring return structure 23 is located on the outside of the matching hinge 21, and pushes the matching hinge 21 to move towards the other hinge 21 to achieve reset.

[0077] The spring reset structure 23 includes a reset spring 231 and spring mounting adapter structures located on the hinge 21 and the insulating housing 1, respectively. The reset spring 231 is mounted by the spring mounting adapter structures located on the hinge 21 and the insulating housing 1, respectively.

[0078] The guide protrusion 221 includes an upper guide rail 2211, a spring mounting groove 232 as a spring mounting adapter structure, and a lower guide rail 2212. The upper guide rail 2211 and the lower guide rail 2212 are located on the upper and lower sides of the spring mounting groove 232. The guide slide 222 on the back of the hinge 21 includes an upper slide 2221, a spring mounting slide 233 as a spring mounting adapter structure, and a lower slide 2222. The upper guide rail 2211 is embedded in the upper slide 2221, and the lower guide rail 2212 is embedded in the lower slide 2222. There is a snap-fit ​​structure 223 between the upper guide rail 2211 and the upper slide 2221, and there is a snap-fit ​​structure 223 between the lower guide rail 2212 and the lower slide 2222. The spring mounting groove 232 is embedded in the spring mounting slide 233, and the return spring 231 is installed in the cavity of the spring mounting groove 232 and the spring mounting slide 233.

[0079] The two ends of the return spring 231 are limited, making it difficult for the return spring 231 to slip out of the hinge protection structure 2, thus ensuring the service life of the hinge protection structure 2. The pressure of the return spring 231 is 5N. When a 1mm cone tip is used to apply an insertion force of 1N between the two hinges 21, the hinges 21 cannot be opened.

[0080] As shown in Figure 3, the hinge 21 is a shell structure that is closed on the front and open on the back. The insulating shell 1 covered by the hinge 21 has a limiting protrusion 112. The limiting protrusion 112 cooperates with the limiting fit structure on the back of the hinge to limit the reset end position of the hinge 21.

[0081] As shown in Figure 6, the limiting protrusion 112 is embedded in the shell cavity on the back of the hinge 21 and cooperates with the inner wall of the outer side of the hinge 21, which is a limiting fit structure, to limit the reset end position of the hinge 21.

[0082] The spring mounting groove 233 has a spring mounting protrusion 234 in its cavity, and a spring mounting hole 235 in its spring mounting protrusion 234. The inner end of the reset spring 231 is inserted into the spring mounting hole 235. The spring mounting groove 232 has a limiting protrusion 112 in its cavity, and the spring mounting protrusion 234 also has a limiting protrusion 112 as a limiting fit structure. The limiting protrusion 112 in the spring mounting groove 232 and the limiting protrusion 112 on the spring mounting protrusion 234 on the back of the hinge 21 cooperate to limit the reset endpoint position of the hinge 21.

[0083] As shown in Figure 5, it also includes a conductive plug 13, which is installed in the inner cavity of the insulating shell 1. The rear end of the insulating shell 1 has a rear insertion port 121. The insulating shell 1 is divided into a front shell 11 on the front side and a rear shell 12 on the rear side.

[0084] As shown in Figure 4, the front surfaces of the adjacent inner sides of the two hinges 21 are outwardly expanding bevels, and a notch 211 is provided between the mating surfaces of the two hinges 21. The notch 211 corresponds to the conductive plug 13 in the inner cavity of the insulating shell 1. The notch 211 is provided to prevent the copper busbar of the main circuit moving plug 31 from rubbing against the hinges 21 and rubbing off the conductive paste when it moves in and out.

[0085] As shown in Figures 8b-8d, the copper busbar of the main circuit moving plug 31 has a size of 6*30mm, 8*30mm, 8*35mm or 6*40mm. Since the height of the copper busbar is ≥30mm, as shown in Figures 7b-7d, the upper guide rail 2211, the spring mounting groove 232 which is a spring mounting adapter structure and the lower guide rail 2212 of the corresponding hinge protection structure 2 have a gap in the vertical direction.

[0086] During assembly, first insert the return spring 231 into the spring mounting hole 235, then align the limiting protrusion 112 in the spring mounting groove 232 and the limiting protrusion 112 on the spring mounting protrusion 234 on the back of the hinge 21 with the mating position. Next, insert the upper guide rail 2211 into the upper sliding groove 2221 and the lower guide rail 2212 into the lower sliding groove 2222. When inserted, the upper sliding groove 2221 and the lower sliding groove 2222 undergo a certain deformation, allowing the snap-fit ​​structure 223 to engage and enter the upper sliding groove 2221 and the lower sliding groove 2222. At this time, the other end of the return spring 231 is limited in the spring mounting groove 232.

[0087] Example 2

[0088] It is basically the same as Example 1, except that:

[0089] As shown in Figure 7a, the guide protrusion 221 includes a spring mounting groove 232 as a spring mounting adapter structure, and the guide slide 222 on the back of the hinge 21 includes a spring mounting slide 233 as a spring mounting adapter structure. There is a snap-fit ​​structure 223 between the upper groove frame of the spring mounting groove 232 and the upper groove wall of the spring mounting slide 233, and there is a snap-fit ​​structure 223 between the lower groove frame of the spring mounting groove 232 and the lower groove wall of the spring mounting slide 233. The spring mounting groove 232 is embedded in the spring mounting slide 233, and the reset spring 231 is installed in the groove cavity of the spring mounting groove 232 and the spring mounting slide 233.

[0090] The copper busbar of the main circuit moving plug 31 shown in Figure 8a is 3*20mm or 5*20mm in size. Since the height of the copper busbar is only 20mm, the upper guide rail 2211, the spring mounting groove 232 which is the spring mounting adapter structure, and the lower guide rail 2212 of the corresponding hinge protection structure 2 shown in Figure 7a are connected together to form an integrated structure.

[0091] Example 3

[0092] In both Embodiment 1 and Embodiment 2, a hinge 21 is equipped with a return spring 231. In Embodiment 2, compared to Embodiment 1, the upper guide rail 2211 and the lower guide rail 2212 in Embodiment 1 are connected together with the spring mounting groove 232 to form an integrated structure.

[0093] As shown in Figures 15-18, this embodiment 3 is basically the same as embodiment 2, except that:

[0094] A hinge 21 is equipped with two parallel return springs 231, replacing Embodiment 1. A corresponding number of spring mounting protrusions 234 are fitted within the groove of the spring mounting slot 233, i.e., two spring mounting protrusions 234 are used for mounting one end of the two parallel return springs 231. The other ends of the two return springs 231, like in Embodiments 1 and 2, directly abut against the inner wall of the side groove frame of the spring mounting protrusion 232.

[0095] The limiting protrusions 112 of the two spring mounting protrusions 234 extend toward each other and are connected as a whole.

[0096] Of course, it is also possible that a spring mounting protrusion 234 is fitted inside the groove of the spring mounting slide 233. The spring mounting protrusion 234 has two spring mounting holes 235 for mounting one end of two side-by-side return springs 231.

[0097] Example 4

[0098] A unit assembly includes a unit chamber 4 and a unit 3. A main circuit connector for incoming lines is installed on the unit chamber 4 for connection to a vertical busbar. The main circuit connector for incoming lines is a unit chamber incoming line hinge-protected main circuit connector as described in Embodiment 1, Embodiment 2, or Embodiment 3. The front socket 111 and the hinge protection structure 2 of the unit chamber incoming line hinge-protected main circuit connector are located inside the unit chamber 4.

[0099] Unit 3 has a unit main circuit moving plug 31. The rear end of the insulating shell of the unit main circuit moving plug 31 has a relief groove 312 recessed into the front side of the unit rear plate 32 of the unit 3. When the unit main circuit moving plug 31 is plugged into the unit chamber inlet hinge-protected main circuit connector, the unit chamber inlet hinge-protected main circuit connector is allowed to move by embedding the protruding part of the front end of the unit chamber inlet hinge-protected main circuit connector beyond the unit rear plate 32 into the relief groove 312.

[0100] The advancement of the unit main circuit moving plug 31 in unit 3 includes the following process:

[0101] As shown in Figure 9a, at this time, the unit main circuit moving plug 31 and the unit room incoming line hinge-protected main circuit connector are in the separated position.

[0102] After the push is made, as shown in Figure 9b, at this time the main circuit moving plug 31 of the unit and the main circuit connector of the unit room incoming line with hinge protection type are in the opening hinge starting position, and the front end of the copper busbar of the main circuit moving plug 31 of the unit enters the space between the adjacent inclined surfaces of the two hinges 21.

[0103] As the process continues, as shown in Figure 9c, during the opening of the hinge between the unit main circuit moving plug 31 and the unit chamber inlet hinge-protected main circuit connector, the copper busbar of the unit main circuit moving plug 31 pushes the two hinges 21 to move backwards and expose the front insertion port 111. The copper busbar of the unit main circuit moving plug 31 does not contact the conductive plug 13 inside the unit chamber inlet hinge-protected main circuit connector. During the backward movement of the two hinges 21, the composite spring 231 is compressed and deformed.

[0104] As shown in Figure 9d, when the circuit is finally pushed to the connection position, the main circuit moving plug 31 of the unit is connected to the main circuit connector with hinge protection for the incoming line of the unit chamber. At this time, the copper busbar of the main circuit moving plug 31 of the unit enters the main circuit connector with hinge protection for the incoming line of the unit chamber and connects to its internal conductive plug 13. The main circuit and the auxiliary circuit are connected synchronously.

[0105] After unit 3 is removed from the connection position, the copper busbar of the unit main circuit moving plug 31 is removed from the unit chamber inlet hinge protection type main circuit connector, and the composite spring 231 restores its deformation and pushes the hinge 21 back to its original position. At this time, the hinge 21 is in the closed state, sealing the front plug 111, and the hinge protection structure 2 of the unit chamber inlet hinge protection type main circuit connector maintains IP40.

[0106] The drawer unit (600mm wide) in Figure 10a and the drawer unit (500mm wide) in Figure 10c adopt the main circuit moving plug-in 31 shown in Figure 8a of Embodiment 2.

[0107] The drawer unit (600mm wide) in Figure 10b and the drawer unit (500mm wide) in Figure 10d adopt the main circuit moving plug-in 31 shown in Figure 8b of Embodiment 1;

[0108] The unit compartment (600mm wide - 200mm module) in Figure 11a is connected and assembled with the drawer unit in Figure 10a to form the drawer unit assembly shown in Figure 13a.

[0109] The assembly of the unit compartment (600mm wide - 300mm module) in Figure 11b and the drawer unit in Figure 10b, corresponding to each other, is shown in Figure 13b.

[0110] The assembly of the unit compartment (500mm wide - 200mm module) in Figure 11c and the drawer unit in Figure 10c, corresponding to each other, is shown in Figure 13c.

[0111] The assembly formed by connecting the unit compartment (500 width - 300 module) in Figure 11d with the drawer unit in Figure 10d is shown in Figure 13d.

[0112] The specific connection process is as follows:

[0113] After assembly, the insulating shell 1 is fixed to the inlet side of the unit compartment rear plate 41. The unit compartment inlet is connected to the vertical busbar 42 using a hinge-protected main circuit connector. The phase spacing of the unit compartment inlet is consistent with the phase spacing of the vertical busbar 42. The paired plug-in unit main circuit moving plugs 31 and the unit compartment inlet hinge-protected main circuit connectors are arranged in layers from top to bottom on the inlet side. The phase center of the unit main circuit moving plug 31 corresponds to the phase center of the corresponding phase of the circuit breaker. The unit main circuit moving plug 31 is connected to the corresponding phase of the circuit breaker through the circuit breaker connecting blocks 311 arranged in layers from top to bottom (shown in Figures 12a-12c).

[0114] In Figures 13a-13d and 14b, the circuit breaker connection bus 311 serves as the copper bus of the unit main circuit moving plug 31. The unit main circuit moving plug 31 is connected to the circuit breaker in a non-lapping manner. This method saves copper and makes the unit shallower, so that the unit's incoming line protection level can better meet the high standard requirements of the application.

[0115] In Figure 14a, the copper busbar of the unit main circuit moving plug 31 needs to be connected to the circuit breaker connection bus 311 (circuit breaker connection bus 311 is not shown) in an overlapping manner, and the circuit breaker connection bus 311 is connected to the circuit breaker.

[0116] Of course, when this unit is used in a control loop, the copper busbar of the unit's main circuit moving plug 31 is connected to the circuit breaker via a wire. When the unit is advanced, the hinge of the main circuit connector with hinge protection for the unit compartment incoming line is opened. At this time, there is only a mating requirement for the main circuit connectors with hinge protection for the unit compartment incoming line of each phase. The phase-to-phase arrangement is no longer restricted, and it can still be ensured that the hinge opens when the unit is advanced and closes when the unit is withdrawn.

[0117] This unit compartment incoming line hinge-protected main circuit connector is used for connecting the vertical busbar to the unit compartment incoming line. The connection structure, where the phase-to-phase center of the incoming line main circuit connector corresponds to the phase-to-phase center of the corresponding phase in the unit's main circuit moving connector and circuit breaker, remains unchanged, ensuring high versatility and the complete feasibility of the unit assembly. It achieves IP40 protection for the unit compartment incoming line during unit maintenance and removal, with application costs four times lower than existing hinge devices and essentially consistent with the currently used IP20 incoming line protection covers. Compared to foreign brands' IP40 hinge devices, the cost is more than ten times lower.

[0118] The unit inlet hinge-protected main circuit connector of this patent application is applied to withdrawable units, allowing the unit to be pulled out for maintenance. It meets the high standard requirement of IP40 protection for the unit inlet, has extremely high versatility, is highly practical, and has a very broad market application prospect.

Claims

1. A hinge-protected main circuit connector for unit room incoming lines, characterized in that, include: An insulating shell (1) has a front insertion port (111) at its front end; Hinge protection structure (2) is installed at the front end of the insulating shell (1) to close the front socket (111); The hinge protection structure (2) includes: The left and right hinges (21) are opened by sliding back and forth to expose the front insertion port (111). The front of the adjacent inner side of the two hinges (21) is an outwardly expanding slope, which is used to cooperate with the head end of the copper busbar of the unit main circuit moving plug (31). When the copper busbar of the unit main circuit moving plug (31) is inserted, the left and right hinges (21) are pushed to slide back and forth to open. The left and right hinges (21) can be moved and opened to the left and right sides and installed on the insulating shell (1) through the translation guide installation structure (22); The spring reset structure (23) is used to push the left and right hinges (21) to reset and close, sealing the front insertion port (111).

2. The hinge-protected main circuit connector for unit room incoming lines according to claim 1, characterized in that: The translational guide mounting structure (22) includes a guide protrusion (221) on the insulating shell (1) and a guide groove (222) on the back of the hinge (21). The guide protrusion (221) is embedded in the guide groove (222) to guide the hinge (21) to translate left and right. There is also a snap-fit ​​structure (223) between the guide protrusion (221) and the guide groove (222) for the hinge (21) to be snapped onto the guide protrusion (221) through the guide groove (222) for translation.

3. The hinge-protected main circuit connector for unit room incoming lines according to claim 2, characterized in that: Both left and right hinges (21) have a matching spring return structure (23). The spring return structure (23) is located on the outside of the matching hinge (21) and pushes the matching hinge (21) to move to the other hinge (21) to achieve reset.

4. The hinge-protected main circuit connector for unit room incoming lines according to claim 3, characterized in that: The spring reset structure (23) includes a reset spring (231) and spring mounting adapter structures located on the hinge (21) and the insulating shell (1) respectively. The reset spring (231) is installed through the spring mounting adapter structures located on the hinge (21) and the insulating shell (1) respectively.

5. The hinge-protected main circuit connector for unit room incoming lines according to claim 4, characterized in that: The guide protrusion (221) includes an upper guide rail (2211), a spring mounting groove (232) serving as a spring mounting adapter structure, and a lower guide rail (2212). The upper guide rail (2211) and the lower guide rail (2212) are located on the upper and lower sides of the spring mounting groove (232). The guide groove (222) on the back of the hinge (21) includes an upper groove (2221) and a spring mounting groove (232) serving as a spring mounting adapter structure. 3) and the sliding groove (2222), the upper guide rail (2211) is embedded in the upper sliding groove (2221), the lower guide rail (2212) is embedded in the sliding groove (2222), the upper guide rail (2211) and the upper sliding groove (2221) have a snap-fit ​​structure (223), the lower guide rail (2212) and the sliding groove (2222) have a snap-fit ​​structure (223), the spring mounting protrusion (232) is embedded in the spring mounting sliding groove (233), and the reset spring (231) is installed in the groove cavity of the spring mounting protrusion (232) and the spring mounting sliding groove (233).

6. The hinge-protected main circuit connector for unit room incoming lines according to claim 4, characterized in that: The guide protrusion (221) includes a spring mounting protrusion (232) as a spring mounting adapter structure. The guide slide (222) on the back of the hinge (21) includes a spring mounting slide (233) as a spring mounting adapter structure. There is a snap-fit ​​structure (223) between the upper groove frame of the spring mounting protrusion (232) and the upper groove wall of the spring mounting slide (233). There is a snap-fit ​​structure (223) between the lower groove frame of the spring mounting protrusion (232) and the lower groove wall of the spring mounting slide (233). The spring mounting protrusion (232) is embedded in the spring mounting slide (233). The reset spring (231) is installed in the groove cavity of the spring mounting protrusion (232) and the spring mounting slide (233).

7. The hinge-protected main circuit connector for unit room incoming lines according to claim 5 or 6, characterized in that: The hinge (21) is a shell structure that is closed on the front and open on the back. The insulating shell (1) covered by the hinge (21) has a limiting protrusion (112). The limiting protrusion (112) cooperates with the limiting fit structure on the back of the hinge to limit the reset end position of the hinge (21).

8. The hinge-protected main circuit connector for unit room incoming lines according to claim 7, characterized in that: The limiting protrusion (112) is embedded in the shell cavity on the back of the hinge (21) and cooperates with the inner wall of the outer side of the hinge (21) as a limiting fit structure to limit the reset end position of the hinge (21).

9. The hinge-protected main circuit connector for unit room incoming lines according to claim 5 or 6, characterized in that: The spring mounting groove (233) has a spring mounting protrusion (234) in its cavity, and a spring mounting hole (235) in its spring mounting protrusion (234). The inner end of the reset spring (231) is inserted into the spring mounting hole (235). The spring mounting groove (232) has a limiting protrusion (112), and the spring mounting protrusion (234) also has a limiting protrusion (112) as a limiting fit structure. The limiting protrusion (112) in the spring mounting groove (232) and the limiting protrusion (112) on the spring mounting protrusion (234) on the back of the hinge (21) cooperate to limit the reset end position of the hinge (21).

10. The hinge-protected main circuit connector for unit room incoming lines according to claim 9, characterized in that: A hinge (21) is paired with a return spring (231); Alternatively, a hinge (21) may be equipped with two or more parallel return springs (231), and the spring mounting groove (233) may be equipped with a corresponding number of spring mounting protrusions (234), or the spring mounting groove (233) may be equipped with a spring mounting protrusion (234), and the spring mounting protrusion (234) may have a corresponding number of spring mounting holes (235).

11. The hinge-protected main circuit connector for unit room incoming lines according to claim 1, characterized in that: It also includes a conductive plug (13), which is installed in the inner cavity of the insulating shell (1). The rear end of the insulating shell (1) has a rear insertion port (121). The insulating shell (1) is divided into a front shell (11) on the front side and a rear shell (12) on the rear side.

12. The hinge-protected main circuit connector for unit room incoming lines according to claim 11, characterized in that: A notch (211) is provided between the mating surfaces of the two hinges (21), and the notch (211) is provided corresponding to the conductive plug (13) in the inner cavity of the insulating shell (1).

13. A unit assembly, characterized in that: It includes a unit chamber (4) and a unit (3). The unit chamber (4) is equipped with an incoming main circuit connector for connecting to the vertical busbar (42). The incoming main circuit connector is the unit chamber incoming hinge-protected main circuit connector as described in claim 1. The front socket (111) and the hinge protection structure (2) of the unit chamber incoming hinge-protected main circuit connector are located inside the unit chamber (4).

14. The unit assembly according to claim 13, characterized in that: The unit (3) has a unit main circuit moving plug (31). The rear end of the insulating shell of the unit main circuit moving plug (31) has a relief groove (312) recessed into the front side of the unit rear plate (32) of the unit (3). When the unit main circuit moving plug (31) is plugged into the unit room inlet hinge-protected main circuit connector, the unit room inlet hinge-protected main circuit connector is allowed to move by embedding the protruding part of the front end of the unit room inlet hinge-protected main circuit connector into the relief groove (312).

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