Hinge protection type main circuit connector for incoming line of unit room and unit assembly

Abstract

The utility model relates to the technical field of complete switch equipment, in particular to a hinge protection type main circuit connector for incoming lines of a unit chamber, which comprises an insulating shell, a main circuit board, a main circuit board and a main circuit board, and is characterized in that the front end of the insulating shell is provided with a front socket; and the hinge protection structure is arranged at the front end of the insulating shell and seals the front jack. When the unit pushes the copper bar of the unit main circuit movable plug-in to be inserted into the hinge, the hinge is driven to be opened, the unit main circuit movable plug-in is withdrawn, and the hinge is automatically closed. According to the hinge protection type main circuit connector for the incoming line of the unit room, the inter-phase center of the connector corresponds to the inter-phase center of the unit main circuit movable plug-in and the circuit breaker, a main circuit is not in lap joint connection, the structure of the circuit breaker is not changed, and the problems of application feasibility and universality are solved; the hinge protection type main circuit connector for the incoming line of the unit room is applied to the incoming line side of the unit room, so that the protection grade IP40 of the incoming line of the unit room reaches the high standard.

Description

Technical Field

[0001] The utility model relates to the technical field of complete switchgear, in particular to a hinge-protected main circuit connector for unit room incoming lines and a unit assembly. Background Art

[0002] At present, the drawer unit of the withdrawable switch cabinet is connected to the vertical busbar by the main circuit dynamic plug-in unit input. The input side of the unit room rear panel needs to be equipped with an IP20 input protection cover. When the unit is pulled out, the protective cover socket is not closed. There is also a hinge device installed on the input side of the unit room rear panel, and a drive component is installed on the unit to open the hinge device to achieve IP40 input protection. If a drive component is installed on the unit to drive the hinge device to open, the hinge will be damaged due to mechanical failure. The applicant has also proposed an IP40 hinge device, which is specifically shown in Chinese patent document CN201360106Y. The main circuit dynamic plug-in on the unit that is matched with the IP40 hinge device is an alternating straight fixed structure. When the unit is pushed into the unit room, the hinge of the hinge device is opened by the drive component on the unit and closed by the drive component when the unit is withdrawn.

[0003] Currently, the main circuit connectors used in the drawer units of withdrawable switchgear are unit main circuit dynamic connectors, while the main circuit connectors installed in the unit compartment are for connecting the vertical busbars. Currently, the IP20 and IP40 protection structures on the incoming side of the unit compartment of withdrawable switchgear are essentially limited to the two aforementioned structures, with the hinge device installed on the incoming side of the unit compartment rear panel. Only two models of switchgear from foreign brands feature IP40 hinge devices on the main incoming side of the withdrawable unit compartment. To achieve IP40 protection, both the unit compartment and the unit require drive components, which not only lacks universality but also creates a high cost for the installed hinge device. Due to the low cost of IP20 protection for the unit compartment, users generally do not require IP40 protection for the drawer unit. Furthermore, even hinge devices that achieve IP40 protection can have installation tolerances, resulting in the hinge not opening when the drawer unit is pushed forward, and occasional hinge breakage.

[0004] The applicant has proposed a main circuit reversing plug-in, a main circuit connection structure, and a functional unit. See Chinese patent document CN214898297U for details. The main circuit connector for connecting the incoming line to the vertical busbar is a single-phase structure fixed to the rear panel of the unit chamber. The phase center of the three-phase main circuit connector corresponds to the phase center of the main circuit plug-in on the drawer unit and is consistent with the phase center of the circuit breaker. The incoming line end has an IP20 protection level.

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

[0006] While the interphase centers of the incoming main circuit connectors in this patent application correspond to the interphase centers of the corresponding phases of the unit main circuit dynamic connectors and circuit breakers, the interphase center distances of circuit breakers of different current ratings vary. For example, the interphase center distances of 630A circuit breakers are 43.7mm, 44mm, 45mm, 46mm, and 58mm. Achieving universal IP40 protection on the incoming line side of the unit compartment is a challenge addressed by this application. Utility Model Content

[0007] The technical problem to be solved by the present invention is that the existing hinge device is not universal. In order to overcome this technical problem, a hinge-protected main circuit connector and a unit assembly for unit room incoming lines are provided, so that they have feasibility and versatility of application.

[0008] The technical solution adopted by the utility model is: a hinge-protected main circuit connector for unit room incoming lines, comprising:

[0009] An insulating shell, wherein the front end of the insulating shell has a front socket;

[0010] Hinge protection structure, which is installed at the front end of the insulating shell to close the front socket;

[0011] Hinge protection structure includes:

[0012] The left and right hinges are movable horizontally to open in opposite directions to expose the front insertion port. The front surfaces of the adjacent inner sides of the two hinges are inclined surfaces that expand outwards and are used to cooperate with the head end of the copper busbar of the unit main circuit dynamic plug-in. When the copper busbar of the unit main circuit dynamic plug-in is inserted, the left and right hinges are pushed to move horizontally to open in opposite directions.

[0013] The left and right hinges can be opened and moved back to back by the translation guide installation structure and installed on the insulating shell.

[0014] The spring return structure is used to push the left and right hinges to return to their original position and close, sealing the front insertion opening.

[0015] Furthermore, the translation guide installation structure includes a guide protrusion located on the insulating shell and a guide slot located on the back of the hinge. The guide protrusion is embedded in the guide slot to guide the hinge to move left and right.

[0016] There is also a snap-fit ​​structure between the guide protrusion and the guide slot, which is used to allow the hinge to be snapped onto the guide protrusion through the guide slot for translation.

[0017] Furthermore, the left and right hinges both have matching spring return structures, which are located on the outside of the matching hinges and push the matching hinges to move toward the other hinge to achieve return.

[0018] Furthermore, the spring return structure includes a return spring and spring mounting adapter structures respectively located on the hinge and the insulating shell, and the return spring is installed through the spring mounting adapter structures respectively located on the hinge and the insulating shell.

[0019] Furthermore, the guide protrusion includes an upper guide rail, a spring mounting protrusion groove as a spring mounting adapter structure and a lower guide rail, the upper guide rail and the lower guide rail are located on the upper and lower sides of the spring mounting protrusion groove, 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, the lower guide rail is embedded in the lower slide groove, a snap-fit ​​structure is provided between the upper guide rail and the upper slide groove, a snap-fit ​​structure is provided between the lower guide rail and the lower slide groove, the spring mounting protrusion groove is embedded in the spring mounting slide groove, and the return spring is installed in the groove cavity of the spring mounting protrusion groove and the spring mounting slide groove.

[0020] Furthermore, the guide protrusion includes a spring mounting protrusion as a spring mounting adapter structure, and the guide slide groove on the back of the hinge includes a spring mounting slide groove as a spring mounting adapter structure. There is a snap structure between the upper groove frame of the spring mounting protrusion and the upper groove wall of the spring mounting slide groove, and there is a snap structure between the lower groove frame of the spring mounting protrusion and the lower groove wall of the spring mounting slide groove. The spring mounting protrusion is embedded in the spring mounting slide groove, and the return spring is installed in the groove cavity of the spring mounting protrusion and the spring mounting slide groove.

[0021] Furthermore, the hinge is a shell structure with a closed front and an open back. The insulating shell covered by the hinge has a limiting protrusion, which cooperates with the limiting matching structure on the back of the hinge to limit the reset end position of the hinge.

[0022] Furthermore, the limiting protrusion is embedded in the shell cavity on the back side of the hinge and cooperates with the inner wall of the outer side of the hinge as a limiting matching structure to limit the reset end position of the hinge.

[0023] Furthermore, the groove cavity of the spring mounting groove has a spring mounting protrusion, the spring mounting protrusion has a spring mounting hole, the inner end of the reset spring is inserted into the spring mounting hole, the spring mounting protrusion groove has a limiting protrusion, and the spring mounting protrusion also has a limiting protrusion as a limiting matching structure. The limiting protrusion in the spring mounting protrusion groove cooperates with the limiting protrusion on the spring mounting protrusion on the back of the hinge to limit the reset end position of the hinge.

[0024] Furthermore, one hinge is equipped with one return spring; or, one hinge is equipped with two or more return springs arranged side by side, and the groove cavity of the spring mounting slide is equipped with a corresponding number of spring mounting protrusions, or the groove cavity of the spring mounting slide is equipped with a spring mounting protrusion, and the spring mounting protrusion has a corresponding number of spring mounting holes.

[0025] 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 socket, and the insulating shell is divided into a front shell on the front side and a rear shell on the rear side.

[0026] Furthermore, a gap is provided between the fitting surfaces of the two hinges, and the gap corresponds to the conductive plug in the inner cavity of the insulating shell.

[0027] A unit assembly includes a unit chamber and a unit. A main circuit connector for incoming lines is installed on the unit chamber for connecting to a vertical busbar. The main circuit connector for incoming lines is the above-mentioned hinge-protected main circuit connector for incoming lines in the unit chamber. The front socket and hinge protection structure of the hinge-protected main circuit connector for incoming lines in the unit chamber are located in the unit chamber.

[0028] Furthermore, the unit is provided with a unit main circuit dynamic plug-in, and the rear end of the insulating shell of the unit main circuit dynamic plug-in has a yield groove recessed to the front side of the unit rear plate of the unit, which is used to yield to the unit room incoming line hinge protection type main circuit connector by embedding the protruding part of the front end of the unit room incoming line hinge protection type main circuit connector beyond the unit rear plate into the yield groove when the unit main circuit dynamic plug-in is plugged into the unit room incoming line hinge protection type main circuit connector.

[0029] Compared to existing technologies, this utility model has the following advantages: the hinge of the hinge protection structure is opened by inserting the unit main circuit dynamic plug-in. When the unit is advanced, the inclined surface of the copper bar head of the unit main circuit dynamic plug-in mates with the inclined surface of the hinge to open the hinge and connect the unit room input line hinge protection type main circuit connector, thus achieving plug-in connection of the unit main circuit dynamic plug-in. When the unit is withdrawn, the plug-in bar of the unit main circuit dynamic plug-in is pulled out, and the hinge automatically closes. The hinge protection structure of the unit room input line hinge protection type main circuit connector self-maintains IP40 protection. The utility model does not require additional drive components, thus preventing mechanical failure and damage to the hinge.

[0030] The hinged-protected main circuit connector for unit room incoming lines in this utility model maintains its connection structure, aligned with the phase centers of the unit main circuit dynamic plug-in and the corresponding phase centers of the circuit breaker. This solves the practical and universal issues of the main circuit's non-overlapping connection structure caused by the mismatch in the phase centers of the circuit breaker. This hinged-protected main circuit connector for unit room incoming lines, when used on the incoming line side of a unit room, ensures that the unit room incoming line protection level reaches the high standard of IP40.

[0031] This incoming line hinge has main circuit connector current ratings of 125A, 250A, 400A, and 630A. This hinge structure is applicable regardless of the main circuit connector current, circuit breaker current rating, or phase center mismatch, achieving universal and feasible application of the main circuit connection structure without overlap, raising the unit room protection rating from IP20 to IP40. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a structural diagram of the utility model;

[0034] Figure 2 This is a structural diagram of the hinge protection structure of the utility model;

[0035] Figure 3 It is a structural diagram of the hinge of the utility model;

[0036] Figure 4 It is a structural schematic diagram of the utility model from another angle;

[0037] Figure 5 This utility model Figure 4 Schematic diagram of the cross section along the AA direction;

[0038] Figure 6 This utility model Figure 4 Schematic cross-section along the middle BB direction;

[0039] Figure 7a This is a schematic diagram of the structure of the utility model when it is used for a 125A circuit breaker (corresponding to a 3*20mm copper busbar for a movable plug-in) / a 250A circuit breaker (corresponding to a 5*20mm copper busbar for a movable plug-in);

[0040] Figure 7bThis is a schematic diagram of the structure of the utility model when it is used for a 400A circuit breaker (corresponding to a 6*30mm copper busbar of a movable plug-in);

[0041] Figure 7c This is a schematic diagram of the structure of the utility model when it is used for a 630A circuit breaker (corresponding to 8*30mm copper busbar / 8*35mm copper busbar for the movable plug-in);

[0042] Figure 7d This is a schematic diagram of the structure of the utility model when it is used for a 630A circuit breaker (corresponding to a 6*40mm copper busbar of a movable plug-in);

[0043] Figure 8a This utility model Figure 7a The structural diagram of the main circuit dynamic plug-in of the corresponding unit;

[0044] Figure 8b This utility model Figure 7b The structural diagram of the main circuit dynamic plug-in of the corresponding unit;

[0045] Figure 8c This utility model Figure 7c The structural diagram of the main circuit dynamic plug-in of the corresponding unit;

[0046] Figure 8d This utility model Figure 7d The structural diagram of the main circuit dynamic plug-in of the corresponding unit;

[0047] Figure 9a This is a structural diagram of the utility model showing the unit main circuit dynamic plug-in and the unit room incoming line hinge protection type main circuit connector in the separated position;

[0048] Figure 9b This is a structural diagram of the utility model of the unit main circuit dynamic plug-in and the unit room incoming line hinge protection type main circuit connector in the opening hinge starting position;

[0049] Figure 9c This is a structural diagram of the utility model of the unit main circuit dynamic plug-in and the unit room incoming line hinge protection type main circuit connector in the process of opening the hinge;

[0050] Figure 9d This is a structural diagram of the utility model showing the connection position of the unit main circuit dynamic plug-in and the unit room incoming line hinge protection type main circuit connector;

[0051] Figure 10a-Figure 10d This is a rear view of the drawer unit with the movable plug-in fixed thereto according to the present invention;

[0052] Figure 11a-Figure 11d This is a schematic structural diagram of a unit chamber of the utility model, which is fixed with a hinge-protected main circuit connector for the unit chamber incoming line;

[0053] Figure 12a-12c This is a schematic diagram of the structure of the unit main circuit dynamic plug-in unit of the utility model, in which the unit circuit breaker connecting bar is used as the copper bar of the unit main circuit dynamic plug-in unit;

[0054] Figure 13a-13d This is a structural diagram of a drawer unit assembly for a power distribution circuit of the present utility model;

[0055] Figure 14a and Figure 14b It is a schematic diagram of a drawer unit assembly for a control circuit of the present utility model;

[0056] Figure 15 This is a schematic structural diagram of Example 3 of the present utility model;

[0057] Figure 16 This is a schematic diagram of the hinge protection structure of Example 3 of the present invention. Figure 1 ;

[0058] Figure 17 This is a schematic structural diagram of the hinge of Example 3 of the present utility model;

[0059] Figure 18 This is a schematic diagram of the hinge protection structure of Example 3 of the present invention. Figure 2 .

[0060] Numbers in the figure:

[0061] 1-insulating 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-translation guide installation structure, 221-guide protrusion, 2211-upper guide rail, 2212-lower guide rail, 222-guide slide, 2221-upper slide, 2222-lower slide, 223-catch structure, 23-spring return structure, 231-return spring, 232-spring installation protrusion, 233-spring installation slide, 234-spring installation protrusion, 235-spring installation hole;

[0063] 3-unit, 31-unit main circuit dynamic plug-in, 311-circuit breaker connection bar, 312-make way groove, 32-unit rear plate;

[0064] 4-unit room, 41-unit room rear plate; 42-vertical busbar. DETAILED DESCRIPTION

[0065] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0066] Example 1

[0067] like Figures 1-6 A hinge-protected main circuit connector for a unit room incoming line is shown, comprising:

[0068] An insulating housing 1, wherein the front end of the insulating housing 1 has a front socket 111;

[0069] Hinge protection structure 2, which is installed at the front end of the insulating housing 1 and closes the front insertion opening 111;

[0070] Hinge protection structure 2 includes:

[0071] The left and right hinges 21 are opened by sliding in opposite directions to expose the front socket 111. The front surfaces of the adjacent inner sides of the two hinges 21 are outwardly expanding inclined surfaces for mating with the head end of the copper busbar of the unit main circuit dynamic plug-in. When the copper busbar of the unit main circuit dynamic plug-in is inserted, the left and right hinges 21 are pushed to slide in opposite directions to open.

[0072] The two hinges 21 are installed on the insulating housing 1 so as to be open and move back to back by means of the translation guide installation structure 22.

[0073] The spring return structure 23 is used to push the left and right hinges 21 to return to their original position and close, thereby sealing the front insertion opening 111 .

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

[0075] A snap-fit ​​structure 223 is provided between the guide protrusion 221 and the guide slot 222 , for enabling the hinge 21 to be snap-fitted onto the guide protrusion 222 through the guide slot 222 for translation.

[0076] The left and right hinges 21 both have a spring return structure 23 matched therewith. The spring return structure 23 is located outside the matched hinge 21 and pushes the matched hinge 21 to translate toward the other hinge 21 to achieve return.

[0077] The spring return structure 23 includes a return spring 231 and spring mounting adapter structures respectively located on the hinge 21 and the insulating housing 1 . The return spring 231 is installed through the spring mounting adapter structures respectively located on the hinge 21 and the insulating housing 1 .

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

[0079] The return spring 231 is restrained at both ends, preventing it from slipping out of the hinge guard 2, thus ensuring the service life of the hinge guard 2. The return spring 231 has a pressure of 5N. When a 1mm cone tip is used to apply a 1N insertion force between the two hinges 21, the hinges 21 will not open.

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

[0081] like Figure 6 As shown, 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 matching structure to limit the reset end position of the hinge 21.

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

[0083] like Figure 5As shown, 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 socket 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] like Figure 4 As shown, the adjacent inner front surfaces of the two hinges 21 are outwardly expanding inclined surfaces, and a notch 211 is provided between the mating surfaces of the two hinges 21. The notch 211 is provided to correspond to the conductive plug 13 in the inner cavity of the insulating housing 1. The notch 211 is provided to prevent the copper busbar of the main circuit dynamic plug 31 from rubbing against the hinge 21 during insertion and removal, thereby rubbing off the conductive paste.

[0085] like Figure 8b-8d As shown, the size of the copper busbar of the main circuit dynamic plug-in 31 is 6*30mm, 8*30mm, 8*35mm or 6*40mm. Since the height of the copper busbar is ≥30mm, as shown in FIG. Figure 7b-7d As shown, there is a distance in the vertical direction between the upper guide rail 2211 of the hinge protection structure 2, the spring installation protrusion 232 as the spring installation adapter structure, and the lower guide rail 2212.

[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 with the limiting protrusion 112 on the spring mounting protrusion 234 on the back of the hinge 21 to the matching position, then insert the upper guide rail 2211 into the upper slide groove 2221 and the lower guide rail 2212 into the lower groove 2222. During the insertion, the upper slide groove 2221 and the lower groove 2222 undergo a certain deformation to allow the snap structure 223 to fit into the upper slide groove 2221 and the lower 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] like Figure 7a As shown, the guide protrusion 221 includes a spring mounting protrusion 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. A snap structure 223 is provided between the upper groove frame of the spring mounting protrusion 232 and the upper groove wall of the spring mounting slide 233, and a snap structure 223 is provided 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, and the return spring 231 is installed in the groove cavity of the spring mounting protrusion 232 and the spring mounting slide 233.

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

[0091] Example 3

[0092] In both Example 1 and Example 2, a hinge 21 is provided with a return spring 231 , and compared with Example 1, Example 2 is equivalent to connecting the upper guide rail 2211 and the lower guide rail 2212 in Example 1 with the spring mounting groove 232 to form an integrated structure.

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

[0094] One hinge 21 is equipped with two return springs 231 arranged side by side, replacing the one in Example 1. A corresponding number of spring mounting protrusions 234 are provided within the spring mounting groove 233, i.e., two spring mounting protrusions 234 are provided to mount one end of the two return springs 231 arranged side by side. As in Examples 1 and 2, the other ends of the two return springs 231 are directly abutted against the inner wall of the side channel 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 not excluded that a spring mounting protrusion 234 is provided in the groove cavity of the spring mounting slot 233 , and the spring mounting protrusion 234 has two spring mounting holes 235 for mounting one end of two return springs 231 arranged side by side.

[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 connecting to a vertical busbar. The main circuit connector for incoming lines is a hinge-protected main circuit connector for incoming lines of the unit chamber of Example 1, Example 2 or Example 3. The front socket 111 and the hinge protection structure 2 of the hinge-protected main circuit connector for incoming lines of the unit chamber are located in the unit chamber 4.

[0099] Unit 3 has a unit main circuit dynamic plug-in 31, and the rear end of the insulating shell of the unit main circuit dynamic plug-in 31 has a makeshift groove 312 recessed to the front side of the unit rear plate 32 of unit 4, which is used to make way for the unit room incoming line hinge protection type main circuit connector when the unit main circuit dynamic plug-in 31 is plugged into the unit room incoming line hinge protection type main circuit connector by embedding the protruding part of the front end of the unit room incoming line hinge protection type main circuit connector beyond the unit rear plate 32 into the makeshift groove 312.

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

[0101] like Figure 9a As shown, at this time, the unit main circuit dynamic plug-in 31 and the unit room incoming line hinge protection type main circuit connector are in the separated position;

[0102] After advancement, Figure 9b As shown, at this time, the unit main circuit dynamic plug-in 31 and the unit room incoming line hinge protection type main circuit connector are at the opening hinge starting position, and the front end of the copper bar of the unit main circuit dynamic plug-in 31 enters between the adjacent inclined surfaces of the two hinges 21;

[0103] After continuing to advance, if Figure 9c As shown, at this time, when the hinges of the unit main circuit movable plug 31 and the unit room incoming line hinge protection type main circuit connector are opening, the copper busbar of the unit main circuit movable plug 31 pushes the two hinges 21 to move backward and then expose the front socket 111. The copper busbar of the unit main circuit movable plug 31 does not contact the conductive plug 13 in the unit room incoming line hinge protection type main circuit connector. During the backward translation of the two hinges 21, the composite spring 231 is compressed and deformed.

[0104] like Figure 9d As shown, it is finally pushed to the connection position, and the unit main circuit dynamic plug-in 31 is in a connected state with the hinge-protected main circuit connector for the unit room incoming line. At this time, the copper busbar of the unit main circuit dynamic plug-in 31 enters the hinge-protected main circuit connector for the unit room incoming line and is connected to the conductive plug 13 inside it, and the main circuit and the auxiliary circuit are connected synchronously.

[0105] After unit 3 is withdrawn from the connection position, the copper busbar of the unit main circuit dynamic plug-in 31 withdraws from the hinge-protected main circuit connector for the unit room incoming line, and the composite spring 231 restores its deformation to push the hinge 21 back to its original position. At this time, the hinge 21 is in a closed state and closes the front socket 111. The hinge protection structure 2 of the hinge-protected main circuit connector for the unit room incoming line maintains IP40 by itself.

[0106] Figure 10a Drawer unit (600 width) and Figure 10c The drawer unit (500 width) adopts the embodiment 2 Figure 8aThe main circuit drive plug-in 31 shown,

[0107] Figure 10b Drawer unit (600 width) and Figure 10d The drawer unit (500 width) adopts the embodiment 1 Figure 8b The main circuit dynamic plug-in 31 shown;

[0108] Figure 11a Unit room (600 width - 200 module) and Figure 10a The corresponding drawer units are connected and assembled together to form a drawer unit assembly such as Figure 13a As shown,

[0109] Figure 11b Unit room (600 width - 300 module) and Figure 10b The corresponding assembly of the drawer unit is as follows Figure 13b As shown,

[0110] Figure 11c Unit room (500 width - 200 module) and Figure 10c The corresponding assembly of the drawer unit is as follows Figure 13c As shown,

[0111] Figure 11d Unit room (500 width - 300 module) and Figure 10d The corresponding drawer unit is connected to form an assembly such as Figure 13d As shown;

[0112] The specific connection process is as follows:

[0113] After the insulating housing 1 is assembled, it is fixed on the incoming line side of the unit room rear plate 41. The unit room incoming line is connected to the vertical bus 42 with a hinged protection type main circuit connector. The horizontal phase spacing of the unit room incoming line hinged protection type main circuit connector is consistent with the phase spacing of the vertical bus 42. The paired plug-in unit main circuit dynamic plug-in 31 of each phase on the incoming line side and the unit room incoming line hinged protection type main circuit connector are arranged in layers from top to bottom, and the phase center of the unit main circuit dynamic plug-in 31 is set corresponding to the phase center of the corresponding phase of the circuit breaker. The unit main circuit dynamic plug-in 31 is connected to the circuit breaker connection row 311 ( Figure 12a-12c as shown) are connected one-to-one with the corresponding phases of the circuit breaker.

[0114] Figure 13a-13d 、 Figure 14b In the circuit breaker, the connection bar 311 is used as the copper bar of the unit main circuit dynamic plug-in 31. The unit main circuit dynamic plug-in 31 is connected to the circuit breaker in a non-overlapping manner. This method saves copper and makes the unit shallower, so that the unit incoming line protection level can better meet the application of high standards.

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

[0116] Of course, when this unit is used in a control circuit, the copper busbar of the unit's main circuit dynamic connector 31 is connected to the circuit breaker via a wire, and the unit is advanced, opening the hinge of the hinge-protected main circuit connector for the unit's incoming wiring. In this case, only the hinge-protected main circuit connector for the unit's incoming wiring is required to be mated, and the inter-phase arrangement is no longer restricted. This ensures that the hinge opens when the unit is advanced and closes when the unit is withdrawn.

[0117] This hinged-protected main circuit connector for unit room incoming lines is used to connect the vertical busbars to the incoming lines of the unit room. The connection structure of the phase centers of the incoming main circuit connector and the corresponding phase centers of the unit main circuit dynamic plug-in and circuit breaker remain unchanged, providing high versatility and ensuring the complete feasibility of the unit assembly. This achieves IP40 protection level for the incoming lines of the unit room during unit maintenance removal. The application cost is four times lower than that of existing hinge devices and is basically the same as the IP20 incoming line protective cover currently used in the industry. Compared with IP40 hinge devices from foreign brands, the cost is over 10 times lower.

[0118] The hinge-protected main circuit connector for unit incoming lines in this patent application is used in withdrawable units, allowing the unit to be pulled out for maintenance. The unit room incoming line protection meets the high-level IP40 standard requirements, is highly versatile, and has high practicality, and has broad market application prospects.

Claims

1. A hinge-protected main circuit connector for a unit room incoming line, characterized in that: include: An insulating housing (1), wherein the front end of the insulating housing (1) has a front socket (111); A hinge protection structure (2) is installed at the front end of the insulating housing (1) to close the front insertion opening (111); The hinge protection structure (2) comprises: The left and right hinges (21) are opened by sliding in opposite directions to expose the front insertion port (111). The front surfaces of the adjacent inner sides of the two hinges (21) are inclined surfaces that expand outwards and are used to cooperate with the head end of the copper busbar of the unit main circuit dynamic plug-in (31). When the copper busbar of the unit main circuit dynamic plug-in (31) is inserted, the left and right hinges (21) are pushed to slide in opposite directions to open. A translation guide installation structure (22), wherein the left and right hinges (21) are installed on the insulating housing (1) so as to be openable by translation in opposite directions via 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, thereby sealing the front insertion opening (111).

2. The hinge-protected main circuit connector for unit room incoming lines according to claim 1, characterized in that: The translation guide installation structure (22) comprises a guide protrusion (221) located on the insulating housing (1) and a guide slot (222) located on the back of the hinge (21); the guide protrusion (221) is embedded in the guide slot (222) to guide the hinge (21) to translate left and right. A snap-fit ​​structure (223) is also provided between the guide protrusion (221) and the guide slot (222), for enabling the hinge (21) to be snap-fitted onto the guide protrusion (222) through the guide slot (222) for translation.

3. The hinge-protected main circuit connector for unit room incoming lines according to claim 2, characterized in that: The left and right hinges (21) are both provided with spring reset structures (23) matched therewith. The spring reset structures (23) are located outside the matched hinges (21) and push the matched hinges (21) to move horizontally toward 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 return structure (23) comprises a return spring (231) and spring mounting adapter structures respectively located on the hinge (21) and the insulating housing (1); the return spring (231) is mounted via the spring mounting adapter structures respectively located on the hinge (21) and the insulating housing (1).

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 installation protrusion (232) as a spring installation adaption 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 installation protrusion (232). The guide groove (222) on the back side of the hinge (21) includes an upper groove (2221), a spring installation groove (233) as a spring installation adaption structure, and a lower groove (2222). The upper guide rail (221 1) embedded in the upper slide groove (2221), the lower guide rail (2212) is embedded in the lower slide groove (2222), a snap-fit ​​structure (223) is provided between the upper guide rail (2211) and the upper slide groove (2221), a snap-fit ​​structure (223) is provided between the lower guide rail (2212) and the lower slide groove (2222), the spring mounting convex groove (232) is embedded in the spring mounting slide groove (233), and the return spring (231) is installed in the groove cavity of the spring mounting convex groove (232) and the spring mounting slide 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 adapting structure, the guide slide (222) on the back side of the hinge (21) includes a spring mounting slide (233) as a spring mounting adapting structure, a buckle structure (223) is provided between the upper groove frame of the spring mounting protrusion (232) and the upper groove wall of the spring mounting slide (233), a buckle structure (223) is provided 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), and the return 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 with a closed front and an open back. The insulating shell (1) covered by the hinge (21) is provided with a limiting protrusion (112). The limiting protrusion (112) cooperates with a limiting matching 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 matching 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 installation groove (233) has a spring installation protrusion (234) in the groove cavity, and a spring installation hole (235) in the spring installation protrusion (234). The inner end of the reset spring (231) is inserted into the spring installation hole (235). The spring installation protrusion (232) has a limiting protrusion (112). The spring installation protrusion (234) also has a limiting protrusion (112) as a limiting matching structure. The limiting protrusion (112) in the spring installation protrusion (232) cooperates with the limiting protrusion (112) on the spring installation protrusion (234) on the back of the hinge (21) 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 equipped with a return spring (231); Alternatively, one hinge (21) is equipped with two or more return springs (231) arranged side by side, and a corresponding number of spring mounting protrusions (234) are equipped in the groove cavity of the spring mounting chute (233), or a spring mounting protrusion (234) is equipped in the groove cavity of the spring mounting chute (233), and the spring mounting protrusion (234) has 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: The invention also includes a conductive plug (13) installed in the inner cavity of the insulating shell (1). The rear end of the insulating shell (1) has a rear socket (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 gap (211) is provided between the fitting surfaces of the two hinges (21), and the gap (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: The invention comprises a unit chamber (4) and a unit (3); a main circuit connector for incoming lines is installed on the unit chamber (4) for connecting to a vertical busbar (42); the main circuit connector for incoming lines is a hinge-protected main circuit connector for incoming lines of the unit chamber as claimed in claim 1; a front socket (111) and a hinge protection structure (2) of the hinge-protected main circuit connector for incoming lines of the unit chamber are located in the unit chamber (4).

14. The unit assembly according to claim 13, characterized in that: The unit (3) is provided with a unit main circuit dynamic plug-in (31), and the rear end of the insulating shell of the unit main circuit dynamic plug-in (31) is provided with a recessed groove (312) recessed to the front side of the unit rear plate (32) of the unit (4), and is used for recessing the unit room incoming line hinge protection type main circuit connector by inserting the portion of the front end of the unit room incoming line hinge protection type main circuit connector that exceeds the unit rear plate (32) into the recessed groove (312) when the unit main circuit dynamic plug-in (31) is plugged into the unit room incoming line hinge protection type main circuit connector.

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