Three power supply civil air defense transfer switch

Abstract

The application discloses a three-power civil air defense transfer switch, which comprises a switch shell and a manual operating mechanism. The switch shell is provided with a first power input terminal, a second power input terminal, a third power input terminal, a load terminal, a first movable contact, a first stationary contact, a second movable contact, a second stationary contact and a third movable contact. The manual operating mechanism is used for driving the third movable contact to switch between a first position and a second position. When the third movable contact is in the first position, the third power input terminal is conducted with the load terminal through the third movable contact, and the first power input terminal and the second power input terminal remain in a disconnected state with the load terminal. The three-power civil air defense transfer switch has a reasonable structure, and when switched to the third power through the manual operating mechanism, the first power and the second power can be disconnected with the load, so that a safety accident of short circuit between the powers is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to a three power supply civil air defense transfer switch. BACKGROUND

[0002] Some industries and departments with high requirements for power supply generally use double power supply automatic transfer switch to control power supply. For civil air defense projects with very high requirements for power supply, double power supply cannot meet the requirements, and three power supplies, i.e. first power supply, second power supply and third power supply, are needed to meet the requirements for power supply. The operating mechanism of the three power supply transfer switch is divided into electric operating mechanism and manual operating mechanism. Generally, the electric operating mechanism is mainly used to control the switching of the three power supply transfer switch, but during the failure or maintenance of the electric operating mechanism, the manual operating mechanism needs to be used to switch to the third power supply for use. When the third power supply is connected, the other two power supplies should not be connected from being disconnected to being connected, so as to avoid the short circuit between the power supplies and prevent major safety accidents. Therefore, it is hoped to design a three power supply civil air defense transfer switch which can ensure that the first power supply and the second power supply are disconnected from the load when the third power supply is switched by the manual operating mechanism, so as to improve the reliability and safety of the three power supply transfer switch. SUMMARY

[0003] The present application relates to a three power supply civil air defense transfer switch.

[0004] In order to achieve the above object, the technical scheme of the present application is to design a three power civil air defense transfer switch, comprising a switch shell and a manual operating mechanism, the switch shell is provided with a first power input terminal, a second power input terminal, a third power input terminal, a load terminal, a first movable contact, a first stationary contact, a second movable contact and a second stationary contact, the first movable contact can be closed or separated from the first stationary contact, the second movable contact can be closed or separated from the second stationary contact, the first movable contact is electrically connected with the first power input terminal through a soft wire, the switch shell is also provided with a C-shaped conductive part, a flat plate conductive part and a third movable contact, the first stationary contact and the second stationary contact are arranged on the top of the flat plate conductive part, and the first stationary contact and the second stationary contact are electrically connected with the flat plate conductive part, the C-shaped opening of the C-shaped conductive part is arranged outward, the second movable contact is electrically connected with the C-shaped conductive part through a soft wire, the second power input terminal is arranged in the C-shaped opening of the C-shaped conductive part, and the second power input terminal is electrically connected with the C-shaped conductive part, the third power input terminal is located above the flat plate conductive part, and the bottom of the third power input terminal is provided with a stationary contact A, the top of the flat plate conductive part is provided with a stationary contact B, the third movable contact is movably connected in the switch shell, the bottom of the third movable contact is provided with a connecting block, the connecting block is electrically connected with the load terminal through a soft wire, the third movable contact is provided with a movable contact A and a movable contact B, the manual operating mechanism is used to drive the third movable contact to switch between a first position and a second position, when the third movable contact is in the first position, the movable contact A is closed with the stationary contact A, and the movable contact B is disconnected with the stationary contact B, when the third movable contact is in the second position, the movable contact A is disconnected with the stationary contact A, and the movable contact B is closed with the stationary contact B.

[0005] Preferably, the flat plate conductive part is arranged in the C-shaped opening of the C-shaped conductive part, and the flat plate conductive part is located above the second power input terminal.

[0006] Preferably, the first movable contact is rotatably connected in the switch shell through a shaft pin, and the first movable contact is connected with a first driving arm through a first connecting rod, the first driving arm is used to drive the first movable contact to swing up and down through the first connecting rod.

[0007] Preferably, the second movable contact is rotatably connected in the switch shell through a shaft pin, and the second movable contact is connected with a second driving arm through a second connecting rod, the second driving arm is used to drive the second movable contact to swing up and down through the second connecting rod.

[0008] The present application has the advantages and benefits that a three power civil air defense transfer switch is provided, which has a reasonable structure, and when switched to the third power through the manual operating mechanism, the first power and the second power can be disconnected with the load, so as to prevent the safety accidents of short circuit between the powers, and improve the reliability and safety of the three power transfer switch. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the present invention.

[0010] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0011] Figure 3 This is a schematic diagram of the C-shaped conductive element in this invention. Detailed Implementation

[0012] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0013] The specific technical solution of this invention is as follows:

[0014] like Figure 1 , Figure 2 and Figure 3The utility model discloses a three power supply civil air defense transfer switch, including switch casing 1 and manual operation mechanism, be equipped with first power input terminal 2, second power input terminal 3, third power input terminal 4, load terminal 5, first movable contact 6, first static contact 7, second movable contact 8 and second static contact 9 in the switch casing 1, first movable contact 6 can be closed or separated with first static contact 7, second movable contact 8 can be closed or separated with second static contact 9, first movable contact 6 is electrically connected with first power input terminal 2 through soft wire, C-shaped conductive part 10, flat plate conductive part 11 and third movable contact 12 are further equipped in the switch casing 1, first static contact 7 and second static contact 9 are all arranged at the top of flat plate conductive part 11, and first static contact 7 and second static contact 9 are electrically connected with flat plate conductive part 11, the C-shaped opening of C-shaped conductive part 10 is outwardly arranged, second movable contact 8 is electrically connected with C-shaped conductive part 10 through soft wire, second power input terminal 3 is passed in the C-shaped opening of C-shaped conductive part 10, and second power input terminal 3 is electrically connected with C-shaped conductive part 10, third power input terminal 4 is located above flat plate conductive part 11, and the bottom of third power input terminal 4 is equipped with static contact A 13, the top of flat plate conductive part 11 is equipped with static contact B 14, third movable contact 12 is movably connected in the switch casing 1, the bottom of this third movable contact 12 is equipped with connecting block 15, and connecting block 15 is electrically connected with load terminal 6 through soft wire, the movable contact A 16 and movable contact B 17 are equipped on third movable contact 12, the manual operation mechanism is used to drive third movable contact 12 and switches between first position and second position, when third movable contact 12 is at first position, movable contact A 16 is closed with static contact A 13, and movable contact B 17 is disconnected with static contact B 14, when third movable contact 12 is at second position, movable contact A 16 is disconnected with static contact A 13, and movable contact B 17 is closed with static contact B 14. By adopting the above scheme, under normal circumstances, the load is powered by the first power supply or the second power supply, at this time, the movable contact A 16 of third movable contact 12 is disconnected with static contact A 13, and the movable contact B 17 of third movable contact 12 is closed with static contact B 14, when first movable contact 6 is closed with first static contact 7, first power input terminal 2 will be in turn conducted through first movable contact 6, first static contact 7, flat plate conductive part 11 and third movable contact 12 with load terminal 5, so as to power the load by the first power supply, and when second movable contact 8 is closed with second static contact 9, second power input terminal 3 will be in turn conducted through C-shaped conductive part 10, second movable contact 8, second static contact 9, flat plate conductive part 11 and third movable contact 12 with load terminal 5, so as to power the load by the second power supply.When the third power supply needs to be used to supply power to the load in an emergency, the third movable contact 12 can be switched from the second position to the first position by manually operating the mechanism, and the position switching of the third movable contact 12 can be achieved by rotating the third movable contact 12. When the third movable contact 12 is in the first position, the movable contact A16 and the fixed contact A13 are closed, and the movable contact B17 and the fixed contact B14 are disconnected. At this time, the third power supply input terminal 4 will be conducted through the third movable contact 12 and the load terminal 5, so as to supply power to the load by the third power supply, and at the same time, the first fixed contact 7 and the second fixed contact 8 can be disconnected from the load terminal 5, so as to ensure that the first power supply input terminal 2 and the second power supply input terminal 3 remain disconnected from the load terminal 5, thereby preventing the safety accident of short circuit between power supplies.

[0015] Further, the flat plate conductive part 11 is arranged in the C-shaped opening of the C-shaped conductive part 10, and the flat plate conductive part 11 is located above the second power supply input terminal 3. By adopting the above scheme, the arrangement of the second power supply input terminal 3, the flat plate conductive part 11 and the C-shaped conductive part 10 is more compact, which is beneficial to save the internal space of the switch housing 1.

[0016] Further, the first movable contact 6 is rotatably connected in the switch housing 1 through a shaft pin, and the first movable contact 6 is connected with a first driving arm 18 through a first connecting rod, and the first driving arm 18 is used to drive the first movable contact 6 to swing up and down through the first connecting rod. By adopting the above scheme, the first movable contact 6 is driven to swing up and down by the first driving arm 18, so as to realize the closing or separation of the first movable contact 6 and the first fixed contact 7.

[0017] Further, the second movable contact 8 is rotatably connected in the switch housing 1 through a shaft pin, and the second movable contact 8 is connected with a second driving arm 19 through a second connecting rod, and the second driving arm 19 is used to drive the second movable contact 8 to swing up and down through the second connecting rod. By adopting the above scheme, the second movable contact 8 is driven to swing up and down by the second driving arm 19, so as to realize the closing or separation of the second movable contact 8 and the second fixed contact 9.

[0018] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A three power source civil defense transfer switch, comprising a switch housing and a manually operated mechanism, the switch housing is provided with a first power input terminal, a second power input terminal, a third power input terminal, a load terminal, a first movable contact, a first stationary contact, a second movable contact and a second stationary contact, the first movable contact can be closed or separated with the first stationary contact, the second movable contact can be closed or separated with the second stationary contact, characterized in that, The first moving contact is electrically connected with the first power input terminal through a soft wire, the switch shell is further provided with a C-shaped conductive part, a flat plate conductive part and a third moving contact, the first and second fixed contacts are arranged on the top of the flat plate conductive part, and the first and second fixed contacts are electrically connected with the flat plate conductive part, the C-shaped opening of the C-shaped conductive part is arranged outward, the second moving contact is electrically connected with the C-shaped conductive part through a soft wire, the second power input terminal is arranged in the C-shaped opening of the C-shaped conductive part and is electrically connected with the C-shaped conductive part, the third power input terminal is located above the flat plate conductive part, and the bottom of the third power input terminal is provided with a fixed contact A, the top of the flat plate conductive part is provided with a fixed contact B, the third moving contact is movably connected in the switch shell, the bottom of the third moving contact is provided with a connecting block, the connecting block is electrically connected with the load terminal through a soft wire, the third moving contact is provided with a moving contact A and a moving contact B, the manual operating mechanism is used for driving the third moving contact to switch between the first position and the second position, when the third moving contact is in the first position, the moving contact A is closed with the fixed contact A, and the moving contact B is disconnected with the fixed contact B, when the third moving contact is in the second position, the moving contact A is disconnected with the fixed contact A, and the moving contact B is closed with the fixed contact B.

2. The three-mains civil defense transfer switch according to claim 1, characterized in that, The flat plate conductive part is arranged in the C-shaped opening of the C-shaped conductive part and is located above the second power input terminal.

3. The three-mains civil defense transfer switch according to claim 2, characterized in that, The first moving contact is rotatably connected in the switch shell through a shaft pin, and the first moving contact is connected with a first driving arm through a first connecting rod, and the first driving arm is used for driving the first moving contact to swing up and down through the first connecting rod.

4. The three-mains civil defense transfer switch according to claim 3, characterized in that, The second moving contact is rotatably connected in the switch shell through a shaft pin, and the second moving contact is connected with a second driving arm through a second connecting rod, and the second driving arm is used for driving the second moving contact to swing up and down through the second connecting rod.

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