A rigid mechanical interlocking device for an up-and-down type medium-voltage dual power cabinet

Abstract

The present invention provides a rigid mechanical interlocking device for an up-and-down type medium-voltage dual power cabinet, which includes switch one and switch two, as well as an interlocking mechanism; a main shaft and a tripping rod are provided in both switch one and switch two; the interlocking mechanism includes a bracket assembly installed on the inner side wall of the medium-voltage dual power cabinet, and interlocking rod one and interlocking rod two vertically installed on the bracket assembly and both capable of moving up and down; after switch one and switch two are respectively inserted into the medium-voltage dual power cabinet; both ends of interlocking rod one are respectively lapped with the main shaft of switch one and the tripping rod of switch two and mechanically interlocked; both ends of interlocking rod two are respectively lapped with the tripping rod of switch one and the main shaft of switch two and mechanically interlocked. The structure of the present invention is compact and highly reliable. Since the interlocking mechanism does not need to be connected between the two medium-voltage switches before inserting them into the cabinet, it only needs to push the medium-voltage switches into the cabinet in sequence during installation to automatically interlock, 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 an upper and lower 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 an upper and lower 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 an upper and lower medium-voltage dual power cabinet, comprising two medium-voltage switches arranged up and down 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 provided 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 an interlocking rod one and an interlocking rod two which are vertically installed on the inner side wall of the medium-voltage dual power switch and can both move up and down; after switch one and switch two are respectively inserted into the medium-voltage dual power cabinet; the interlocking rod The two ends of the interlocking 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 switch one is closed, its main shaft rotates and pushes the tripping rod of switch two to rotate through the interlocking rod one, so that switch two is tripped and opened; the two ends of the interlocking 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 switch two is closed, its main shaft rotates and pushes the tripping rod of switch one to rotate through the interlocking rod two, so that switch one is tripped and opened; after switch one and switch two are respectively pulled out of the medium-voltage dual power supply cabinet, the two ends of the interlocking rod one are respectively released from the main shaft of switch one and the tripping rod of switch two and are separated, and the two ends of the interlocking rod two are respectively released from the tripping rod of switch one and the main shaft of switch two and are separated.

[0006] Furthermore, the medium voltage switches are all trolley type medium voltage switches.

[0007] Further, the up-down type medium voltage double power supply cabinet is a CB-level up-down type medium voltage double power supply cabinet.

[0008] Further, the rigid mechanical interlocking device further includes a bracket assembly installed on the inner side wall of the medium voltage double power supply cabinet. The bracket assembly is composed of multiple plate bodies sequentially installed on the inner right side wall of the medium voltage double power supply cabinet from top to bottom; the first interlocking rod and the second interlocking rod are installed on the bracket assembly and can move up and down.

[0009] Further, the bracket assembly is composed of four plate bodies sequentially installed on the inner right side wall of the medium voltage double power supply cabinet from top to bottom. The two plate bodies at both ends are respectively used to install the upper and lower ends of the second interlocking rod, and the two middle plate bodies are simultaneously used to install the first interlocking rod and the second interlocking rod.

[0010] Further, each plate body of the bracket assembly is composed of a bearing plate fixed on the inner right side wall of the medium voltage double power supply cabinet by bolts and a mounting plate fixed on the bearing plate and perpendicular to the first interlocking rod and the second interlocking rod; an installation hole for the first interlocking rod or the second interlocking rod to pass through is formed on the mounting plate, and the first interlocking rod or the second interlocking rod is sleeved in the installation hole and can move up and down along the installation hole.

[0011] Further, an anti-gravity spring for supporting the second interlocking rod is sleeved on the upper end of the second interlocking rod; the upper end of the anti-gravity spring is fixed on the second interlocking rod, and the lower end is supported on the mounting plate of the uppermost plate body of the bracket assembly, and is used to bear the weight of the second interlocking rod in the vertical direction.

[0012] Further, a first swing arm is provided at the right end of the main shaft of the first switch, and a first cantilever pointing to the first switch is provided at the upper end of the first interlocking rod corresponding to the first swing arm; a second swing arm is provided at the right end of the tripping rod of the second switch, and a second cantilever pointing to the second switch is provided at the lower end of the first interlocking rod corresponding to the second swing arm; a third swing arm is provided at the right end of the tripping rod of the first switch, and a third cantilever pointing to the first switch is provided at the upper end of the second interlocking rod corresponding to the third swing arm; a fourth swing arm is provided at the right end of the main shaft of the second switch, and a fourth cantilever pointing to the second switch is provided at the lower end of the second interlocking rod corresponding to the fourth swing arm; after the first switch and the second switch are inserted into the medium voltage double power supply cabinet, the upper edge of the first swing arm overlaps with the lower edge of the first cantilever, the lower edge of the second swing arm overlaps with the upper edge of the second cantilever, the lower edge of the third swing arm overlaps with the upper edge of the third cantilever, and the upper edge of the fourth swing arm overlaps with the lower edge of the fourth cantilever.

[0013] Further, the first swing arm and the fourth swing arm are both perpendicular to the main shaft and are horizontally inward in the open state; the second swing arm and the third swing arm are both perpendicular to the tripping rod and are also horizontally inward in the free state, so as to facilitate the first switch and the second switch to overlap with the interlocking mechanism during the process of inserting into the cabinet body.

[0014] Further, the first cantilever is vertically fixed to the upper end of the first interlocking rod and has an inverted U-shaped structure (i.e., a groove is provided at the end facing the first switch); the first swing arm is placed in the inverted U-shaped opening of the first cantilever; the fourth cantilever is vertically fixed to the lower end of the second interlocking rod and has an inverted U-shaped structure (i.e., a groove is provided at the end facing the second switch); the fourth swing arm is placed in the inverted U-shaped opening of the fourth cantilever; the second cantilever and the second swing arm are both straight plate bodies that overlap each other; the third cantilever and the third swing arm are also both straight plate bodies that overlap each other.

[0015] Further, in another structure of the present invention, the first cantilever, the second cantilever, the third cantilever, the fourth cantilever, the first swing arm, the second swing arm, the third swing arm, and the fourth swing arm are all straight plate bodies. That is, after the first switch and the second switch are inserted into the medium-voltage dual-power cabinet, the upper edge of the first swing arm directly overlaps with the lower edge of the first cantilever, the lower edge of the second swing arm directly overlaps with the upper edge of the second cantilever, the lower edge of the third swing arm directly overlaps with the upper edge of the third cantilever, and the upper edge of the fourth swing arm directly overlaps with the lower edge of the fourth cantilever.

[0016] The present invention directly sets the interlocking mechanism inside the power cabinet. When installing the medium-voltage switch, after simply inserting the two medium-voltage switches into the power cabinet, the medium-voltage switches can automatically overlap with the interlocking mechanism to achieve 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 disengage from the interlocking mechanism; the above settings make the entire 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, during installation, only by sequentially pushing the medium-voltage switches into the cabinet can automatic interlocking be achieved, which is not only convenient for installation but also can greatly save installation, debugging time, and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present invention in detail with reference to the drawings.

[0018] Figure 1 is a schematic structural diagram of a handcart-type medium-voltage switch;

[0019] Figure 2 is a schematic connection diagram of the rigid mechanical interlocking device of the present invention inside a medium-voltage dual-power cabinet;

[0020] Figure 3 is a schematic overlapping diagram of the two interlocking rods and the two switches in the rigid mechanical interlocking device of the present invention;

[0021] Figure 4 is the front view of the first interlocking rod and the second interlocking rod of the present invention;

[0022] Figure 5 is the rear view of the first interlocking rod and the second interlocking rod of the present invention;

[0023] Figure 6 is a schematic structural diagram of one of the plate bodies in the bracket assembly of the present invention;

[0024] As shown in the figure: 1 - Switch One, 101 - Swing Arm One, 102 - Swing Arm Three, 2 - Switch Two, 201 - Swing Arm Four, 202 - Swing Arm Two, 3 - Interlock Rod One, 301 - Cantilever Two, 302 - Cantilever One, 4 - Interlock Rod Two, 401 - Cantilever Four, 402 - Cantilever Three, 403 - Anti - gravity Spring, 5 - Bracket Assembly, 501 - Bearing Plate, 502 - Mounting Plate. Specific Embodiment

[0025] 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.

[0026] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes 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", etc. cited in this specification are only for convenience of description and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0027] 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 - mentioned terms in the present invention can be understood according to specific situations.

[0028] Embodiment 1:

[0029] As Figure 1-3 shown, a rigid mechanical interlock device for an up - and - down type medium - voltage dual - power cabinet of the present invention includes two medium - voltage switches arranged vertically and capable of being inserted into or withdrawn from the medium - voltage dual - power 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 dual - power cabinet); it also includes an interlock mechanism installed inside the medium - voltage dual - power cabinet. The interlock mechanism includes a bracket assembly 5 installed on the inner side wall (right side wall) of the medium - voltage dual - power cabinet, and an interlock rod one 3 and an interlock rod two 4 vertically installed on the bracket assembly 5 and both capable of moving up and down.

[0030] AsFigure 1 As shown, the first switch 1 and the second switch 2 are selected as existing handcart medium-voltage switches. A main shaft a and a trip lever b are provided inside 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 member on the internal operating mechanism of the existing handcart 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 opening mechanism of the medium-voltage switch. The up-and-down type medium-voltage dual-power cabinet is a CB-level up-and-down type medium-voltage dual-power cabinet.

[0031] As Figure 2 shown in Figure 6 As shown, the bracket assembly 5 is composed of four plate bodies sequentially installed on the right inner wall of the medium-voltage dual-power cabinet from top to bottom. The two plate bodies at both ends are respectively used to install the upper and lower ends of the second interlocking rod, and the two middle ones are simultaneously used to install the first interlocking rod 3 and the second interlocking rod 4. Each plate body of the bracket assembly 5 is composed of a bearing plate 501 fixed on the right inner wall of the medium-voltage dual-power cabinet by bolts and a mounting plate 502 fixed on the bearing plate 501 and perpendicular to the installation of the first interlocking rod 3 and the second interlocking rod 4. An installation hole for the first interlocking rod 3 or the second interlocking rod 4 to pass through is opened on the mounting plate 502, and the first interlocking rod 3 or the second interlocking rod 4 is sleeved in the installation hole and can move up and down along the installation hole.

[0032] As Figure 2-5 shown, the first interlocking rod 3 and the second interlocking rod 4 are installed parallel to each other inside the medium-voltage dual-power cabinet and can move up and down inside the medium-voltage dual-power cabinet.

[0033] As Figure 2-5 shown, a first swing arm 101 is provided at the right end of the main shaft 1a of the first switch 1. The first swing arm 101 is vertically fixed at the right end of the main shaft 1a of the first switch 1 and is horizontally inward (pointing to the inside of the medium-voltage dual-power cabinet when the first switch is in the open state, so as to facilitate the first switch and the second switch to overlap with the interlocking mechanism during the process of inserting into the cabinet). A first cantilever 302 pointing to the first switch 1 is provided at the upper end of the first interlocking rod 3 corresponding to the first swing arm 101. 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 overlaps with the first cantilever 302. The first cantilever 302 is vertically fixed at the upper end of the first interlocking rod 3 and has an inverted U-shaped structure, and the first swing arm 101 is in a straight shape and overlaps in the inverted U-shaped opening of the first cantilever 302.

[0034] As Figure 2-5As shown in the figure, a second swing arm 202 is provided at the right end of the tripping lever 2b of the second switch 2. The second swing arm 202 is vertically fixed to the right end of the tripping lever 2b of the second switch 2 and is horizontally inward (pointing to the inside of the medium-voltage double-power cabinet to facilitate the lap joint between the first switch and the second switch and the interlocking mechanism during the insertion of the switches into the cabinet body) when the tripping and opening structure of the second switch 2 is in the opening state; a second cantilever 301 pointing to the second switch 2 is provided at the lower end of the first interlocking lever 3 corresponding to the second swing arm 202. 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 second cantilever 301, and both the second cantilever 301 and the second swing arm 202 are in the shape of an L-shaped plate body lapped with each other.

[0035] As Figure 2-5 shown in the figure, a third swing arm 102 is provided at the right end of the tripping lever 1b of the first switch 1. The third swing arm 102 is vertically fixed to the right end of the tripping lever 1b of the first switch 1 and is horizontally inward (pointing to the inside of the medium-voltage double-power cabinet to facilitate the lap joint between the first switch and the second switch and the interlocking mechanism during the insertion of the switches into the cabinet body) when the tripping and opening mechanism of the first switch 1 is in the opening state; a third cantilever 402 pointing to the first switch 1 is provided at the upper end of the second interlocking lever 4 corresponding to the third swing arm 102. 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 third cantilever 402, and both the third cantilever 402 and the third swing arm 102 are also in the shape of an L-shaped plate body lapped with each other.

[0036] As Figure 2-5 shown in the figure, a fourth swing arm 201 is provided at the right end of the main shaft 2a of the second switch 2. The fourth swing arm 201 is vertically fixed to the right end of the main shaft 2a of the second switch 2 and is horizontally inward (pointing to the inside of the medium-voltage double-power cabinet to facilitate the lap joint between the first switch and the second switch and the interlocking mechanism during the insertion of the switches into the cabinet body) when the second switch 2 is in the opening state; a fourth cantilever 401 pointing to the second switch 2 is provided at the lower end of the second interlocking lever 4 corresponding to the fourth swing arm 201. After the first switch 1 and the second switch 2 are inserted into the medium-voltage double-power cabinet, the upper edge of the fourth swing arm 201 is lapped with the fourth cantilever 401. The fourth cantilever 401 is vertically fixed to the lower end of the second interlocking lever 4 and is in an inverted U-shaped structure, and the fourth swing arm 201 is in an L-shaped structure and is lapped in the inverted U-shaped opening of the fourth cantilever 401.

[0037] As Figure 2 And Figure 3As shown, after switch one 1 and switch two 2 are respectively inserted into the medium-voltage dual-power cabinet, both ends of the first interlocking rod 3 are respectively overlapped and mechanically interlocked with the first swing arm 101 on the main shaft 1a of switch one 1 and the second swing arm 202 on the trip lever 2b of switch two 2 through the first cantilever 302 and the second cantilever 301. That is, when switch one 1 is closed, the main shaft 1a of switch one 1 rotates, driving the first swing arm 101 at its right end to swing upward. The first swing arm 101 then pushes the first cantilever 302 overlapping with it to move upward and drives the first interlocking rod 3 to move upward. The upward movement of the first interlocking rod 3 causes the second cantilever 301 at the lower end of the first interlocking rod 3 to move upward and drives the second swing arm 202 overlapping with it to swing upward. The swing of the second swing arm 202 drives the trip lever 2b of switch two 2 to rotate. Finally, the rotation of the trip lever 2b pulls the trip and opening mechanism in switch two 2 to act, causing switch two 2 to trip and open. That is, when switch one 1 is closed, switch two 2 opens.

[0038] Similarly, after switch one 1 and switch two 2 are respectively inserted into the medium-voltage dual-power cabinet, both ends of the second interlocking rod 4 are respectively overlapped and mechanically interlocked with the trip lever 1b of switch one 1 and the main shaft 2a of switch two 2 through the third cantilever 402 and the fourth cantilever 401. That is, when switch two 2 is closed, the main shaft 2a of switch two 2 rotates, driving the fourth swing arm 201 at its right end to swing upward. The fourth swing arm 201 then pushes the fourth cantilever 401 overlapping with it to move upward and drives the second interlocking rod 4 to move upward. The upward movement of the second interlocking rod 4 causes the third cantilever 402 at the upper end of the second interlocking rod 4 to move upward and drives the third swing arm 102 overlapping with it to swing upward. The swing of the third swing arm 102 drives the trip lever 1b of switch one 1 to rotate. Finally, the rotation of the trip lever 1b pulls the trip and opening mechanism in switch one 1 to act, causing switch one 1 to trip and open. That is, when switch two 2 is closed, switch one 1 opens.

[0039] In this way, only by inserting switch one 1 and switch two 2 into the medium-voltage dual-power cabinet, switch one 1 and switch two 2 can be automatically overlapped with the interlocking mechanism, realizing the automatic interlocking of switch one 1 and switch two 2. The whole process is convenient and fast, and can greatly save the installation, debugging time and labor cost.

[0040] Since switch one 1 and switch two 2 of the present invention are not fixedly connected to the interlocking mechanism, after switch one 1 and switch two 2 are respectively withdrawn from the medium-voltage dual-power cabinet, both ends of the first interlocking rod 3 are respectively disengaged from the main shaft 1a of switch one 1 and the trip lever 2b of switch two 2 and separated. Both ends of the second interlocking rod 4 are respectively disengaged from the trip lever 1b of switch one 1 and the main shaft 2a of switch two 2 and separated.

[0041] The working principle of the present invention is as follows:

[0042] As Figure 2As shown in the figure, when switch 1 is closed, the swing arm 101 on its main shaft 1a will swing upward, pushing the cantilever 302 upward, and then driving the interlocking rod 3 to move upward. Then, the cantilever 301 at the lower end of the interlocking rod 3 pulls the swing arm 202 upward, and then drives the trip lever 2b on the switch 2 to rotate. The rotation of the trip lever 2b further drives the trip and opening mechanism in the switch 2 to trip, making the switch 2 unable to be closed.

[0043] Similarly, as Figure 2 shown in the figure, when the switch 2 is closed, the swing arm 4 on its main shaft 2a will swing upward, pushing the cantilever 401 upward, and then driving the interlocking rod 4 to move upward. Then, the cantilever 402 at the upper end of the interlocking rod 4 pushes the swing arm 102 upward, and then drives the trip lever 1b on the switch 1 to rotate. The rotation of the trip lever 1b further drives the trip and opening mechanism in the switch 1 to trip, making the switch 1 unable to be closed.

[0044] Thus, the following switch states are achieved:

[0045]

[0046] Note: √ - switch closed, × - switch open

[0047] Embodiment 2:

[0048] The difference between this embodiment and Embodiment 1 is that:

[0049] In another structure of the present invention, the cantilever 302, the cantilever 301, the cantilever 402, the cantilever 401, the swing arm 101, the swing arm 202, the swing arm 102, and the swing arm 401 are all L-shaped plate bodies. That is, after the switch 1 and the switch 2 are inserted into the medium-voltage dual-power cabinet, the upper edge of the swing arm 101 is directly lapped with the lower edge of the cantilever 302, the lower edge of the swing arm 202 is directly lapped with the upper edge of the cantilever 301, the lower edge of the swing arm 102 is directly lapped with the upper edge of the cantilever 402, and the upper edge of the swing arm 401 is directly lapped with the lower edge of the cantilever 401.

[0050] Embodiment 3:

[0051] The difference between this embodiment and Embodiments 1 and 2 is that:

[0052] An anti-gravity spring 403 for supporting the interlocking rod 4 is sleeved on the upper end of the interlocking rod 4; the upper end of the anti-gravity spring 403 abuts against the lower edge of the cantilever 402 above the interlocking rod 4 (or is fixed to the upper end of the interlocking rod 4), and the lower end is supported on the mounting plate 502 of the uppermost plate body of the bracket assembly 5, for bearing the weight of the interlocking rod 4 in the vertical direction (so that it will not move down excessively and push the swing arm 401 to rotate downward by its own gravity).

[0053] Since the length and weight of the first interlocking rod 3 are lower than those of the second interlocking rod 4, its gravity is not sufficient to push the first swing arm 101 to rotate downward. However, an anti-gravity spring for supporting the first interlocking rod 3 can also be sleeved on the upper end of the first interlocking rod 3.

[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 further 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 an up-and-down type medium-voltage dual power supply cabinet, comprising two medium-voltage switches arranged vertically 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 rod 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 rod 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 an interlocking rod one and an interlocking rod two that are vertically installed on the inner side walls of the medium-voltage dual-power switches and can both move up and down; After Switch One and Switch Two are respectively inserted into the medium-voltage dual-power cabinet; the two ends of the interlocking rod one are respectively overlapped and mechanically interlocked with the main shaft of Switch One and the tripping rod of Switch Two, that is, when Switch One is closed, its main shaft rotates and pushes the tripping rod of Switch Two to rotate through the interlocking rod one, causing Switch Two to trip and open; the two ends of the interlocking rod two are respectively overlapped and mechanically interlocked with the tripping rod of Switch One and the main shaft of Switch Two, that is, when Switch Two is closed, its main shaft rotates and pushes the tripping rod of Switch One to rotate through the interlocking rod two, causing Switch One to trip and open; There is a swing arm one at the right end of the main shaft of Switch One, and a cantilever one pointing to Switch One is provided corresponding to the swing arm one at the upper end of the interlocking rod one; there is a swing arm two at the right end of the tripping rod of Switch Two, and a cantilever two pointing to Switch Two is provided corresponding to the swing arm two at the lower end of the interlocking rod one; there is a swing arm three at the right end of the tripping rod of Switch One, and a cantilever three pointing to Switch One is provided corresponding to the swing arm three at the upper end of the interlocking rod two; 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 corresponding to the swing arm four at the lower end of the interlocking rod two; after Switch One and Switch Two are inserted into the medium-voltage dual-power cabinet, the upper edge of the swing arm one overlaps with the cantilever one, the lower edge of the swing arm two overlaps with the cantilever two, the lower edge of the swing arm three overlaps with the cantilever three, and the upper edge of the swing arm four overlaps with the cantilever four; The swing arm one and the swing arm four are both perpendicular to the main shaft and are horizontally inward in the open state; the swing arm two and the swing arm three are both perpendicular to the tripping rod and are also horizontally inward in the free state; The cantilever one is vertically fixed at the upper end of the interlocking rod one and has an inverted U-shaped structure; the swing arm one is placed in the inverted U-shaped opening of the cantilever one; the cantilever four is vertically fixed at the lower end of the interlocking rod two and has an inverted U-shaped structure; the swing arm four is placed in the inverted U-shaped opening of the cantilever four; both the cantilever two and the swing arm two are one-shaped plate bodies that overlap with each other; both the cantilever three and the swing arm three are also one-shaped plate bodies that overlap with each other.

2. The rigid mechanical interlock device for the up-and-down 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 interlock device for the up-and-down type medium-voltage dual power supply cabinet according to claim 1, characterized in that : The up-and-down type medium-voltage dual-power cabinet is a CB-class up-and-down type medium-voltage dual-power cabinet.

4. The rigid mechanical interlock device for the up-and-down type medium-voltage dual power supply cabinet according to claim 1, characterized in that: It further includes a bracket assembly installed on the inner side wall of the medium-voltage dual-power cabinet, and the bracket assembly is composed of multiple plates sequentially installed on the right inner side wall of the medium-voltage dual-power cabinet from top to bottom; the interlocking rod one and the interlocking rod two are installed on the bracket assembly and can move up and down.

5. The rigid mechanical interlock device for the up-and-down type medium-voltage dual power supply cabinet according to claim 4, characterized in that: The bracket assembly is composed of four plates sequentially installed on the right inner side wall of the medium-voltage dual-power cabinet from top to bottom. The two plates at both ends are respectively used to install the upper and lower ends of the interlocking rod two, and the two middle plates are simultaneously used to install the interlocking rod one and the interlocking rod two.

6. The rigid mechanical interlock device for the up-and-down type medium-voltage dual power supply cabinet according to claim 5, characterized in that: Each plate of the bracket assembly is composed of a bearing plate fixed to the right inner side wall of the medium-voltage dual-power cabinet by bolts and a mounting plate fixed on the bearing plate and perpendicular to the interlocking rod one and the interlocking rod two; an installation hole for the interlocking rod one or the interlocking rod two to pass through is opened on the mounting plate, and the interlocking rod one or the interlocking rod two is sleeved in the installation hole and can move up and down along the installation hole.

7. The rigid mechanical interlock device for the up-and-down type medium-voltage dual power supply cabinet according to claim 6, characterized in that: An anti-gravity spring for supporting the second interlocking rod is sleeved on the upper end of the second interlocking rod; the upper end of the anti-gravity spring is fixed on the second interlocking rod, and the lower end is supported on the mounting plate of the uppermost plate body of the bracket assembly.

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