A rigid mechanical interlock device for a left-right type medium voltage double power supply cabinet

Abstract

The present invention provides a rigid mechanical interlocking device for a left-right type medium voltage double power supply cabinet, which includes switch one, switch two, and an interlocking mechanism; a main shaft and a tripping rod are provided in both switch one and switch two; the interlocking mechanism includes a connecting rod one and a connecting rod two that are installed in the medium voltage double power supply cabinet and can move up and down between switch one and switch two, and the connecting rod one is arranged behind the connecting rod two; after switch one and switch two are respectively inserted into the medium voltage double power supply cabinet; the two ends of the connecting rod one are respectively overlapped and mechanically interlocked with the main shaft of switch one and the tripping rod of switch two; the two ends of the connecting rod two are respectively overlapped and mechanically interlocked with the tripping rod of switch one and the main shaft of switch two. The structure of the present invention is compact and has high reliability. Since the interlocking mechanism does not need to be connected between the two medium voltage switches before inserting into the cabinet body, when installing, only need to push the medium voltage switches into the cabinet in sequence to achieve automatic interlocking, which is not only convenient for installation, but also can greatly save installation, debugging time and labor costs.

Description

Technical Field

[0001] The invention belongs to the technical field of medium voltage electrical appliances, and in particular relates to a rigid mechanical interlocking device for a left-right medium voltage dual power supply cabinet. Background Art

[0002] Currently in the industry, whether it is Schneider or ABB, before installing two trolley-type medium-voltage switches into a medium-voltage dual power supply cabinet, most of them first fix the mechanical interlocking mechanism between the two trolley-type medium-voltage switches outside the cabinet, and then insert the two switches with the installed mechanical interlocking mechanism into the medium-voltage dual power supply cabinet. However, since the existing mechanical interlocking mechanism mostly adopts flexible interlocking when it is set outside the cabinet, it is affected by the Young's tensile modulus or the excessive length of the dimensional chain, resulting in low reliability of the interlocking function and difficulties in installation and debugging. Summary of the invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a rigid mechanical interlocking device for a left-right medium-voltage dual power supply cabinet which has a compact structure, high reliability, can significantly save installation and debugging time, and save labor costs.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A rigid mechanical interlocking device for a left-right medium-voltage dual power cabinet, comprising two medium-voltage switches arranged left-right and capable of being inserted into or withdrawn from the medium-voltage dual power cabinet, namely switch one and switch two; a main shaft and a tripping rod are arranged in both medium-voltage switches; the main shaft is rotatably installed in the medium-voltage switch laterally and is used to drive the medium-voltage switch to close or open, and the tripping rod is rotatably installed on the top of the medium-voltage switch laterally and is used to drive the medium-voltage switch to trip and open; it also includes an interlocking mechanism installed inside the medium-voltage dual power cabinet and located between switch one and switch two; the interlocking mechanism includes a connecting rod one and a connecting rod two installed in the medium-voltage dual power cabinet and capable of moving up and down between switch one and switch two, and the connecting rod one is arranged at the rear side of the connecting rod two; the medium-voltage dual power cabinet is inserted into switch one and switch two respectively. After the switch one and the switch two are respectively pulled out of the medium-voltage dual power supply cabinet, the two ends of the connecting rod one are respectively overlapped with the main shaft of switch one and the tripping rod of switch two and are mechanically interlocked, that is, when the switch one is closed, its main shaft rotates and pushes the tripping rod of switch two to rotate through the connecting rod one, so that the switch two is tripped and opened; the two ends of the connecting rod two are respectively overlapped with the tripping rod of switch one and the main shaft of switch two and are mechanically interlocked, that is, when the switch two is closed, its main shaft rotates and pushes the tripping rod of switch one to rotate through the connecting rod two, so that the switch one is tripped and opened; after the switch one and the switch two are respectively pulled out of the medium-voltage dual power supply cabinet, the two ends of the connecting rod one are respectively released from the overlap with the main shaft of switch one and the tripping rod of switch two and are separated, and the two ends of the connecting rod two are respectively released from the overlap with the tripping rod of switch one and the main shaft of switch two and are separated.

[0006] Further, the medium-voltage switches are all draw-out medium-voltage switches.

[0007] Further, the left-right type medium-voltage dual power supply cabinet is a CB-level left-right type medium-voltage dual power supply cabinet.

[0008] Further, a swing arm one is provided at the left end of the main shaft of switch one, and a cantilever one pointing to switch one is provided at the lower right side of link one corresponding to the swing arm one; a swing arm two is provided at the right end of the trip lever of switch two, and a cantilever two pointing to switch two is provided at the upper left side of link one corresponding to the swing arm two; a swing arm three is provided at the left end of the trip lever of switch one, and a cantilever three pointing to switch one is provided at the upper right side of link two corresponding to the swing arm three; a swing arm four is provided at the right end of the main shaft of switch two, and a cantilever four pointing to switch two is provided at the lower left side of link two corresponding to the swing arm four; after switch one and switch two are inserted into the medium-voltage dual power supply cabinet, the upper edge of swing arm one overlaps with cantilever one, the lower edge of swing arm two overlaps with cantilever two, the lower edge of swing arm three overlaps with cantilever three, and the upper edge of swing arm four overlaps with cantilever four.

[0009] Further, both swing arm one and swing arm four are perpendicular to the main shaft and are horizontally inward in the open state; both swing arm two and swing arm three are perpendicular to the trip lever and are also horizontally inward in the free state.

[0010] Further, cantilever one is vertically fixed at the lower right side of link one and a notch is provided on the side facing swing arm one; swing arm one is perpendicular to cantilever one and is placed in the notch of cantilever one; cantilever four is vertically fixed at the lower left side of link two and a notch is provided on the side facing swing arm four; swing arm four is perpendicular to cantilever four and is placed in the notch of cantilever four; both cantilever two and swing arm two are perpendicular to each other and are overlapped one-word plate bodies; both cantilever three and swing arm three are also perpendicular to each other and are overlapped one-word plate bodies.

[0011] Further, link one is in a Z-shaped structure, and link two is in an inverted Z-shaped structure.

[0012] Further, the interlock mechanism further includes mounting plate one, intermediate plate, mounting plate two, and connecting shaft; waist-shaped holes are respectively provided vertically on link one and link two; mounting plate one is fixed inside the medium-voltage dual power supply cabinet and is located behind link one; the intermediate plate is arranged between link one and link two; mounting plate two is fixed inside the medium-voltage dual power supply cabinet and is located in front of link two; the connecting shaft is two shaft rods arranged up and down, and each connecting shaft can rotatably penetrate through the waist-shaped hole of mounting plate two, link two, intermediate plate, waist-shaped hole of link one, and mounting plate one from front to back in sequence, and the front and rear ends of each connecting shaft respectively extend outside mounting plate two and mounting plate one and are respectively connected with nuts; the vertical distance between the two connecting shafts is less than the vertical length of the waist-shaped holes on link one and link two; link one and link two can move up and down along their respective waist-shaped holes.

[0013] Further, two bearings are sleeved on each connecting shaft. These two bearings are respectively installed in the waist-shaped holes of the first connecting rod and the second connecting rod and can slide up and down along the waist-shaped holes.

[0014] Further, the bearing is a sliding bearing.

[0015] In the present invention, the interlocking mechanism is directly arranged inside the power cabinet. When installing the medium-voltage switch, after inserting the two medium-voltage switches into the power cabinet, the medium-voltage switches can be automatically lapped with the interlocking mechanism to achieve the automatic interlocking of the two medium-voltage switches. The interlocking mechanism is not fixedly connected to the medium-voltage switch. After the medium-voltage switch is withdrawn, it will be disengaged from the interlocking mechanism; the above settings make the whole device have a compact structure and high reliability. Since the interlocking mechanism does not need to be connected between the two medium-voltage switches before inserting them into the cabinet body, when installing, only need to push the medium-voltage switches into the cabinet in sequence to achieve automatic interlocking, which is not only convenient for installation, but also can greatly save the installation, debugging time and labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the present invention in detail with reference to the drawings.

[0017] Figure 1 It is a schematic structural diagram of a handcart-type medium-voltage switch;

[0018] Figure 2 It is a schematic structural diagram of the rigid mechanical interlocking device of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the rigid mechanical interlocking device of the present invention from another perspective;

[0020] Figure 4 It is a schematic structural diagram of the interlocking mechanism in the rigid mechanical interlocking device of the present invention;

[0021] Figure 5 It is an exploded view of the interlocking mechanism in the rigid mechanical interlocking device of the present invention;

[0022] As shown in the figure: 1-Switch 1, 101-First swing arm, 102-Third swing arm, 2-Switch 2, 201-Fourth swing arm, 202-Second swing arm, 3-Interlocking mechanism, 301-First connecting rod, 3011-First cantilever, 3012-Second cantilever, 302-Second connecting rod, 3021-Third cantilever, 3022-Fourth cantilever, 303-First mounting plate, 304-Intermediate plate, 305-Second mounting plate, 306-Connecting shaft, 307-Nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0024] It should be noted that the structures, proportions, sizes, etc. depicted in the accompanying drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", "front", "back", "inner", "outer", etc. cited in this specification are only for the convenience of narration and clarity, and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0026] As Figures 1-3 shown, a rigid mechanical interlock device for a left-right type medium voltage double power supply cabinet of the present invention includes two medium voltage switches arranged vertically and capable of being inserted into or withdrawn from the medium voltage double power supply cabinet, namely switch one 1 and switch two 2 (switch one 1 is located above switch two 2, and both can be freely inserted into or withdrawn from the medium voltage double power supply cabinet); it also includes an interlock mechanism 3 installed inside the medium voltage double power supply cabinet and located between switch one 1 and switch two 2.

[0027] As Figure 1 shown, switch one 1 and switch two 2 are selected as existing handcart type medium voltage switches. A main shaft a and a trip lever b are provided in both medium voltage switches; the main shaft a is horizontally rotatably installed inside the medium voltage switch and is used to drive the medium voltage switch to close or open. The main shaft a is a driving component on the internal operating mechanism of the existing handcart type medium voltage switch, and its right end extends outside the medium voltage switch; the trip lever b is horizontally rotatably installed on the top of the medium voltage switch and is used to drive the medium voltage switch to trip and open. One end of the trip lever b extends to the right side of the medium voltage switch and is located above the main shaft a, and the other end is linked with the internal trip and open mechanism of the medium voltage switch. The left-right type medium voltage double power supply cabinet is a CB-class left-right type medium voltage double power supply cabinet.

[0028] As Figures 2-5 shown, the interlock mechanism 3 includes a connecting rod one 301, a connecting rod two 302, a mounting plate one 303, an intermediate plate 304, a mounting plate two 305, and a connecting shaft 306.

[0029] The first connecting rod 301 and the second connecting rod 302 are arranged between the first switch 1 and the second switch 2 and can move up and down within a certain range. Both the first connecting rod 301 and the second connecting rod 302 are vertically arranged plate bodies, and the first connecting rod 301 is arranged at the rear side of the second connecting rod 302. Waist-shaped holes 3013 and 3023 are vertically provided on the first connecting rod 301 and the second connecting rod 302 respectively.

[0030] At the left end of the main shaft 1a of the first switch 1, there is a first swing arm 101. The first swing arm 101 is vertically fixed at the left end of the main shaft 1a of the first switch 1 and is horizontally inward (pointing to the inside of the medium-voltage double-power cabinet so that the first switch 1 and the second switch 2 can be lapped with the interlocking mechanism 3 during the process of inserting into the medium-voltage double-power cabinet) when the first switch 1 is in the open state; at the lower right side of the first connecting rod 301, corresponding to the first swing arm 101, there is a first cantilever 3011 pointing to the first switch 1. After the first switch 1 and the second switch 2 are inserted into the medium-voltage double-power cabinet, the upper edge of the first swing arm 101 is lapped with the lower edge of the first cantilever 3011. The first cantilever 3011 is vertically fixed at the lower right side of the first connecting rod 301, and a notch is provided on the side facing the first swing arm 101. The first swing arm 101 is perpendicular to the first cantilever 3011 and is lapped in the notch of the first cantilever 3011.

[0031] At the right end of the tripping rod 2b of the second switch 2, there is a second swing arm 202. The second swing arm 202 is vertically fixed at the right end of the tripping rod 2b of the second switch 2 and is horizontally inward (pointing to the inside of the medium-voltage double-power cabinet so that the first switch 1 and the second switch 2 can be lapped with the interlocking mechanism 3 during the process of inserting into the medium-voltage double-power cabinet) when the tripping and opening mechanism of the second switch 2 is in the free state; at the upper left side of the first connecting rod 301, corresponding to the second swing arm 202, there is a second cantilever 3012 pointing to the second switch 2. After the first switch 1 and the second switch 2 are inserted into the medium-voltage double-power cabinet, the lower edge of the second swing arm 202 is lapped with the upper edge of the second cantilever 3012. Both the second cantilever 3012 and the second swing arm 202 are L-shaped plate bodies perpendicular to each other and lapped together.

[0032] At the left end of the tripping rod 1b of the first switch 1, there is a third swing arm 102. The third swing arm 102 is vertically fixed at the left end of the tripping rod 1b of the first switch 1 and is horizontally inward (pointing to the inside of the medium-voltage double-power cabinet so that the first switch 1 and the second switch 2 can be lapped with the interlocking mechanism 3 during the process of inserting into the medium-voltage double-power cabinet) when the tripping and opening mechanism of the first switch 1 is in the free state; at the upper right side of the second connecting rod 302, corresponding to the third swing arm 102, there is a third cantilever 3021 pointing to the first switch 1. After the first switch 1 and the second switch 2 are inserted into the medium-voltage double-power cabinet, the lower edge of the third swing arm 102 is lapped with the upper edge of the third cantilever 3021. Both the third cantilever 3021 and the third swing arm 102 are also L-shaped plate bodies perpendicular to each other and lapped together.

[0033] At the right end of the main shaft 2a of switch two 2, there is a fourth swing arm 201. The fourth swing arm 201 is vertically fixed at the right end of the main shaft 2a of switch two 2 and is horizontally inward (pointing to the inside of the medium-voltage dual-power cabinet when switch two 2 is in the open state, so as to facilitate the latching of switch one and switch two with the interlocking mechanism 3 during the insertion into the medium-voltage dual-power cabinet); at the lower left side of the second connecting rod 302, there is a fourth cantilever 3022 pointing to switch two 2 corresponding to the fourth swing arm 201. After switch one 1 and switch two 2 are inserted into the medium-voltage dual-power cabinet, the upper edge of the fourth swing arm 201 is latched with the lower edge of the fourth cantilever 3022. The fourth cantilever 3022 is vertically fixed at the lower left side of the second connecting rod 302 and has a notch on the side facing the fourth swing arm 201; the fourth swing arm 201 is perpendicular to the fourth cantilever 3022 and is latched in the notch of the fourth cantilever 3022.

[0034] The above structure makes the first connecting rod 301 and the second connecting rod 302 in a Z shape, where the second connecting rod 302 is arranged reversely in front of the first connecting rod 301.

[0035] The first mounting plate 303 is fixed inside the medium-voltage dual-power cabinet and is located at the rear side of the first connecting rod 301, and is used to cooperate with the intermediate plate 304 and the connecting shaft 306 to limit the first connecting rod 301; through holes are opened at both the upper and lower ends of the first mounting plate 303.

[0036] The intermediate plate 304 is arranged between the first connecting rod and the second connecting rod. Through holes are also opened at both the upper and lower ends of the intermediate plate 304.

[0037] The second mounting plate 305 is fixed inside the medium-voltage dual-power cabinet and is located in front of the second connecting rod 302, and is used to cooperate with the intermediate plate 304 and the connecting shaft 306 to limit the second connecting rod 302; through holes are opened at both the upper and lower ends of the second mounting plate 305.

[0038] The through holes on the upper side of the first mounting plate 303, the through holes on the upper side of the intermediate plate 304, and the through holes on the upper side of the second mounting plate 305 are on the same straight line and are connected to the lower ends of the waist-shaped holes 3013 of the first connecting rod 301 and the waist-shaped holes 3023 of the second connecting rod 302. Similarly, the through holes on the lower side of the first mounting plate 303, the through holes on the lower side of the intermediate plate 304, and the through holes on the lower side of the second mounting plate 305 are on the same straight line and are connected to the lower ends of the waist-shaped holes 3013 of the first connecting rod 301 and the waist-shaped holes 3023 of the second connecting rod 302.

[0039] The connecting shaft 306 is two shafts arranged up and down, and the upper connecting shaft 306 can be rotated from front to back to penetrate the through hole on the upper side of the second mounting plate 305, the upper side of the waist-shaped hole 3023 of the second connecting rod 302, the through hole on the upper side of the middle plate 304, the upper side of the waist-shaped hole 3013 of the first connecting rod 301, and the through hole on the upper side of the first mounting plate 303, and its two ends extend out of the second mounting plate 305 and the first mounting plate 303 and are respectively connected with nuts 307. Similarly, the lower connecting shaft 306 can be rotated from front to back to penetrate the through hole on the upper side of the second mounting plate 305, the upper side of the waist-shaped hole 3023 of the second connecting rod 302, the through hole on the upper side of the middle plate 304, the upper side of the waist-shaped hole 3013 of the first connecting rod 301, and the through hole on the upper side of the first mounting plate 303, and its two ends extend out of the second mounting plate 305 and the first mounting plate 303 and are respectively connected with nuts 307. The upper and lower spacing between the two connecting shafts 306 is smaller than the upper and lower lengths of the waist-shaped holes on connecting rod 1 301 and connecting rod 2 302, so as to ensure that connecting rod 1 301 and connecting rod 2 302 can move up and down within a certain range (the maximum value of the range is equal to the upper and lower length of the waist-shaped hole minus the upper and lower spacing between the two connecting shafts 306); connecting rod 1 301 and connecting rod 2 302 can move up and down along their respective waist-shaped holes.

[0040] like Figure 2 and Figure 3 As shown, after the switch 1 and the switch 2 are respectively inserted into the medium voltage dual power supply cabinet, the two ends of the connecting rod 1 301 are overlapped and mechanically interlocked with the swing arm 101 on the main shaft 1a of the switch 1 and the swing arm 202 on the tripping rod 2b of the switch 2 through the cantilever 1 3011 and the cantilever 2 3012, that is, when the switch 1 is closed, the main shaft 1a of the switch 1 rotates, driving the swing arm 101 at its left end to swing upward, and the swing arm 101 then pushes the swing arm 101 connected to it. The overlapping cantilever arm 1 3011 moves upward and drives the connecting rod 1 301 (along the two connecting shafts) to move upward. The upward movement of the connecting rod 1 301 also moves the cantilever arm 2 3012 at the upper left end of the connecting rod 1 301 upward and pushes the swing arm 202 overlapping with it to swing upward. The swing of the swing arm 202 drives the tripping rod 2b of the switch 2 2 to rotate. Finally, the tripping rod 2b rotates to pull the tripping and opening mechanism in the switch 2 2 to trip and open the switch 2 2. In other words, the switch 1 1 is closed while the switch 2 2 is opened.

[0041] Similarly, after the switch one 1 and the switch two 2 are respectively inserted into the medium-voltage double-power cabinet, both ends of the link two 302 are respectively overlapped and mechanically interlocked with the trip lever 1b of the switch one 1 and the main shaft 2a of the switch two 2 through the cantilever three 3021 and the cantilever four 3022. That is, when the switch two 2 is closed, the main shaft 2a of the switch two 2 rotates, driving the swing arm four 201 at its right end to swing upward. The swing arm four 201 then pushes the cantilever four 3022 with which it is overlapped to move upward and drives the link two 302 to move upward. The upward movement of the link two 302 further causes the cantilever three 3021 at the upper right end of the link two 302 to move upward and push the swing arm three 102 with which it is overlapped to swing upward. The swing of the swing arm three 102 drives the trip lever 1b of the switch one 1 to rotate. Finally, the rotation of the trip lever 1b pulls the trip and opening mechanism in the switch one 1 to act, causing the switch one 1 to trip and open. That is, when the switch two 2 is closed, the switch one 1 opens.

[0042] In this way, only by inserting the switch one 1 and the switch two 2 into the medium-voltage double-power cabinet, the switch one 1 and the switch two 2 can be automatically overlapped with the interlocking mechanism 3, realizing the automatic interlock between the switch one 1 and the switch two 2. The whole process is convenient and fast, and can greatly save the installation, debugging time and labor cost.

[0043] Since the switch one 1 and the switch two 2 of the present invention are not fixedly connected to the interlocking mechanism, after the switch one 1 and the switch two 2 are respectively withdrawn from the medium-voltage double-power cabinet, both ends of the link one 301 are respectively disengaged from the main shaft 1a of the switch one 1 and the trip lever 2b of the switch two 2 and separated, and both ends of the link two 302 are respectively disengaged from the trip lever 1b of the switch one 1 and the main shaft 2a of the switch two 2 and separated.

[0044] The working principle of the present invention is as follows:

[0045] As Figure 2 shown, when the switch one 1 is closed, the swing arm one 101 at the left end of its main shaft 1a will swing upward, pushing the cantilever one 3011 to move upward, and then driving the link one 301 to move upward. Then, the cantilever two 3012 at the upper left end of the link one 301 pushes the swing arm two 202 to swing upward, and then drives the trip lever 2b on the switch two 2 to rotate. The rotation of the trip lever 2b further drives the trip and opening mechanism in the switch two 2 to trip, so that the switch two 2 cannot be closed.

[0046] Similarly, as Figure 2 shown, when the switch two 2 is closed, the swing arm four 201 on its main shaft 2a will swing upward, pushing the cantilever four 3022 to move upward, and then driving the link two 302 to move upward. Then, the cantilever three 3021 at the upper right end of the link two 302 pushes the swing arm three 102 to swing upward, and then drives the trip lever 1b on the switch one 1 to rotate. The rotation of the trip lever 1b further drives the trip and opening mechanism in the switch one 1 to trip, so that the switch one 1 cannot be closed.

[0047] Thus, the following switch states are achieved:

[0048]

[0049] Note: √ - Switch closed, × - Switch open Embodiment 2

[0050] The difference between this embodiment and Embodiment 1 is that:

[0051] In another structure of the present invention, the first cantilever 3011, the second cantilever 3012, the third cantilever 3021, the fourth cantilever 3022, the first swing arm 101, the second swing arm 202, the third swing arm 102, and the fourth swing arm 201 are all in the shape of a straight plate. That is, after the first switch 1 and the second switch 2 are inserted into the medium - voltage dual - power cabinet, the upper edge of the first swing arm 101 directly overlaps with the lower edge of the first cantilever 3011, the lower edge of the second swing arm 202 directly overlaps with the upper edge of the second cantilever 3012, the lower edge of the third swing arm 102 directly overlaps with the upper edge of the third cantilever 3021, and the upper edge of the fourth swing arm 201 directly overlaps with the lower edge of the fourth cantilever 3022. Embodiment 3

[0052] The difference between this embodiment and Embodiments 1 and 2 is that:

[0053] To make the first connecting rod 301 and the second connecting rod 302 slide more smoothly along the connecting shaft 306, two bearings 308 are sleeved on each connecting shaft 306. These two bearings 308 are respectively installed in the waist - shaped holes of the first connecting rod 301 and the second connecting rod 302 and can slide up and down along the waist - shaped holes. The bearing 308 is a sliding bearing.

[0054] It should be noted that the term "comprising", "including" or any other variant is intended to cover non - exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific embodiments. Any modification, equivalent replacement, improvement, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A rigid mechanical interlock device for a left-right type medium voltage dual power supply cabinet, comprising two medium voltage switches arranged left and right and capable of being inserted into or withdrawn from the medium voltage dual power supply cabinet, namely switch one and switch two; a main shaft and a trip lever are provided in both medium voltage switches; the main shaft is horizontally rotatably installed in the medium voltage switch and is used to drive the medium voltage switch to close or open, and the trip lever is horizontally rotatably installed at the top of the medium voltage switch and is used to drive the medium voltage switch to trip and open; characterized in that : It further includes an interlocking mechanism installed inside the medium-voltage dual-power cabinet and located between Switch One and Switch Two; the interlocking mechanism includes Link One and Link Two installed inside the medium-voltage dual-power cabinet and capable of moving up and down between Switch One and Switch Two, and Link One is arranged behind Link Two; After Switch One and Switch Two are respectively inserted into the medium-voltage dual-power cabinet; both ends of Link One are respectively overlapped and mechanically interlocked with the main shaft of Switch One and the trip lever of Switch Two, that is, when Switch One is closed, its main shaft rotates and pushes the trip lever of Switch Two to rotate through Link One, causing Switch Two to trip and open; both ends of Link Two are respectively overlapped and mechanically interlocked with the trip lever of Switch One and the main shaft of Switch Two, that is, when Switch Two is closed, its main shaft rotates and pushes the trip lever of Switch One to rotate through Link Two, causing Switch One to trip and open; There is a Swing Arm One at the left end of the main shaft of Switch One, and a Cantilever One pointing to Switch One is provided at the lower right side of Link One corresponding to Swing Arm One; there is a Swing Arm Two at the right end of the trip lever of Switch Two, and a Cantilever Two pointing to Switch Two is provided at the upper left side of Link One corresponding to Swing Arm Two; There is a Swing Arm Three at the left end of the trip lever of Switch One, and a Cantilever Three pointing to Switch One is provided at the upper right side of Link Two corresponding to Swing Arm Three; there is a Swing Arm Four at the right end of the main shaft of Switch Two, and a Cantilever Four pointing to Switch Two is provided at the lower left side of Link Two corresponding to Swing Arm Four; After Switch One and Switch Two are inserted into the medium-voltage dual-power cabinet, the upper edge of Swing Arm One overlaps with Cantilever One, the lower edge of Swing Arm Two overlaps with Cantilever Two, the lower edge of Swing Arm Three overlaps with Cantilever Three, and the upper edge of Swing Arm Four overlaps with Cantilever Four; Both Swing Arm One and Swing Arm Four are perpendicular to the main shaft and are horizontally inward in the open state; both Swing Arm Two and Swing Arm Three are perpendicular to the trip lever and are also horizontally inward in the free state; Cantilever One is vertically fixed at the lower right side of Link One, and a notch is provided on the side facing Swing Arm One; Swing Arm One is perpendicular to Cantilever One and is placed in the notch of Cantilever One; Cantilever Four is vertically fixed at the lower left side of Link Two, and a notch is provided on the side facing Swing Arm Four; Swing Arm Four is perpendicular to Cantilever Four and is placed in the notch of Cantilever Four; both Cantilever Two and Swing Arm Two are L-shaped plate bodies perpendicular to each other and overlapped together; both Cantilever Three and Swing Arm Three are also L-shaped plate bodies perpendicular to each other and overlapped together.

2. The rigid mechanical interlock device for the left-right type medium voltage dual power supply cabinet according to claim 1, characterized in that : The medium-voltage switches are all draw-out medium-voltage switches.

3. The rigid mechanical interlocking device of the left-right type medium voltage double power supply cabinet according to claim 1, characterized in that : The left-right type medium-voltage dual-power cabinet is a CB-class left-right type medium-voltage dual-power cabinet.

4. The rigid mechanical interlock device of the left-right type medium-voltage double power supply cabinet according to claim 1, characterized in that : Link One is in a Z-shaped structure, and Link Two is in an inverted Z-shaped structure.

5. The rigid mechanical interlock device for the left-right type medium voltage double power supply cabinet according to any one of claims 1-4, characterized in that : The interlocking mechanism further includes a first mounting plate, an intermediate plate, a second mounting plate, and a connecting shaft; waist-shaped holes are vertically provided on the first connecting rod and the second connecting rod respectively; the first mounting plate is fixed inside the medium-voltage dual-power cabinet and is located behind the first connecting rod; the intermediate plate is arranged between the first connecting rod and the second connecting rod; the second mounting plate is fixed inside the medium-voltage dual-power cabinet and is located in front of the second connecting rod; the connecting shaft consists of two shaft rods arranged vertically one above the other, and each connecting shaft can rotatably penetrate through the waist-shaped hole of the second mounting plate, the waist-shaped hole of the second connecting rod, the intermediate plate, the waist-shaped hole of the first connecting rod, and the first mounting plate in sequence from front to back. The front and rear ends of each connecting shaft respectively extend outside the second mounting plate and the first mounting plate and are respectively connected with nuts; the vertical distance between the two connecting shafts is less than the vertical length of the waist-shaped holes on the first connecting rod and the second connecting rod; the first connecting rod and the second connecting rod can move up and down along their respective waist-shaped holes.

6. The rigid mechanical interlocking device for the left-right type medium voltage double power supply cabinet according to claim 5, characterized in that : Two bearings are sleeved on each connecting shaft, and these two bearings are respectively installed in the waist-shaped holes of the first connecting rod and the second connecting rod and can slide up and down along the waist-shaped holes.

7. The rigid mechanical interlocking device of the left-right type medium-voltage dual power supply cabinet according to claim 6, characterized in that : The bearing is a sliding bearing.

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