CN213937529U - Standby power supply automatic switching device convenient for improving safety and stability - Google Patents

Standby power supply automatic switching device convenient for improving safety and stability Download PDF

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Publication number
CN213937529U
CN213937529U CN202022754519.2U CN202022754519U CN213937529U CN 213937529 U CN213937529 U CN 213937529U CN 202022754519 U CN202022754519 U CN 202022754519U CN 213937529 U CN213937529 U CN 213937529U
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China
Prior art keywords
casing
panel
switching device
power source
backup power
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CN202022754519.2U
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Chinese (zh)
Inventor
冯豆
姚庭镜
王康
王高洁
曲鸿春
刘邦
杨光辉
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State Grid Corp of China SGCC
Bozhou Power Supply Co of State Grid Anhui Electric Power Co Ltd
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State Grid Corp of China SGCC
Bozhou Power Supply Co of State Grid Anhui Electric Power Co Ltd
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Priority to CN202022754519.2U priority Critical patent/CN213937529U/en
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Abstract

The utility model discloses a stand-by power supply self-throwing device convenient to improve safety and stability, including installation panel, casing, inside lining protective housing and autoalarm subassembly, the casing is fixed to be linked up the installation panel back, inside lining protective housing activity is cup jointed the inside center of casing, autoalarm subassembly sets up between casing and the inside lining protective housing, the positive terminal surface of installation panel rotates installs movable panel, fixed axle both sides end has transparent protective cover through the connecting axle sleeve movable mounting who is equipped with on it, the inside of casing and inside lining protective housing is pressed from both sides respectively and is equipped with thin metal mesh interference killing feature and glass fiber interference killing feature, vertically be provided with the antidetonation board between the linking department of casing and inside lining protective housing, transversely be provided with the autoalarm subassembly. The utility model discloses in, not only the simple operation, while dual protection, existing effect plays the interference killing feature, slows down equipment ageing speed again, improves damping performance and timely alarm effect simultaneously.

Description

Standby power supply automatic switching device convenient for improving safety and stability
Technical Field
The utility model relates to a stand-by power supply hauls oneself willingly into the device field, and specifically speaking relates to a stand-by power supply hauls oneself willingly into device convenient to improve safety and stability nature.
Background
With the continuous development of modern power technology, the size of a power network is larger and larger, and the complexity of the power network is higher and higher. In order to ensure the stability of the power system, various safety automatic devices need to be installed, and the automatic standby power supply switching device is one of the most common devices. The reliability of the power supply of the thermal power plant and the production device area transformer station is directly influenced by the correctness and reliability of the action of the automatic standby power supply switching device.
When a transformer substation or a user has more than two power supplies, in order to consider the problem of system stability, a mode of simultaneously supplying power by two large power supplies (considering that protection calculation is complex, power is reversed when a fault is removed, and the like) is generally not adopted, and a working mode that one power supply supplies power and the other power supply is standby is often adopted. When a line or an electric device has a fault, a standby power supply can be automatically, quickly and accurately put into the electric device or the device can be switched to the standby power supply, so that the power failure of a user is avoided.
The stand-by power supply automatic switching device is generally widely applied to each large factory and large and small transformer substations to carry out power consumption protection in the station domain, however, in the actual use process of putting into operation, because the operational environment in the factory or the transformer substation is complicated, not only the electrical equipment is of various types, can produce electromagnetic interference each other, influence the normal operating of device, inevitable ageing phenomenon can appear after the device works for a long time simultaneously, still can produce the tremble, the vibrations of small amplitude accessible damping device is weakened, but vibrations of a few by a wide margin can't be solved through equipment self, the weakening effect is relatively poor, need in time carry out artificial interference, avoid causing great loss.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a safety and stability can obtain the stand-by power supply auto-switch device that improves by a wide margin is provided.
In order to solve the technical problem, the utility model discloses a following technical scheme: a standby power supply automatic switching device convenient for improving safety and stability comprises an installation panel, a machine shell, a lining protection shell and an automatic alarm assembly, wherein the machine shell is fixedly connected to the back of the installation panel in a linking mode, the lining protection shell is movably sleeved in the center of the interior of the machine shell, and the automatic alarm assembly is arranged between the machine shell and the lining protection shell;
the mounting panel is characterized in that a movable panel is rotatably mounted on one side of the axis of the front end face of the mounting panel through a rotating hinge arranged on the movable panel, the movable panel is embedded on the mounting panel in the middle, a liquid crystal display and an operation key group are respectively arranged at the upper end and the lower end of the axis of the front end face of the movable panel, a soft panel signal lamp group and a manual opening and closing brake are respectively arranged on the two sides of the axis of the front end face of the movable panel, a fixed shaft is mounted on the upper edge of the movable panel and positioned at the upper end of the mounting panel, and transparent protective covers are movably mounted at the two side ends of the fixed shaft through connecting shaft sleeves arranged on the fixed shaft;
the inner parts of the shell and the lining protective shell are respectively clamped with a thin metal mesh anti-interference layer and a glass fiber anti-interference layer, four edges of the inner wall surface of the shell are respectively fixed with a sliding rail, four edges of the outer wall surface of the lining protective shell are respectively fixed with a sliding piece, the sliding rails and the sliding pieces are mutually matched, an anti-seismic plate is longitudinally arranged between the joint parts of the shell and the lining protective shell, and an automatic alarm assembly is transversely arranged;
the automatic alarm assembly comprises a contact, a mounting seat and a conduction chip, the upper end face of the mounting seat is movably mounted with a groove formed in the mounting seat through the contact, the bottom face of the contact is provided with an anode electric conduction layer, the conduction chip is mounted in the mounting seat, and the top end of the conduction chip is provided with a cathode electric conduction layer.
Furthermore, countersunk holes are symmetrically formed in two sides of the mounting panel, the countersunk holes are provided with a plurality of anti-slip stripes, anti-slip stripes are uniformly distributed between the countersunk holes adjacent to one side of each countersunk hole, and the anti-slip stripes are of a protruding structure.
Furthermore, the cross section area of the movable panel is the same as that of the casing, and the movable panel is fixedly connected with the mounting panel through a fixing screw arranged on one side of the axis.
Furthermore, an indicator lamp set is arranged between the liquid crystal display screen and the operation key set, and a contrast adjusting knob is installed on one side of the liquid crystal display screen.
Furthermore, the lower extreme of soft board signal banks is provided with reset switch, external port is installed to manual divide-shut brake's upper end, just external port surface movable mounting has dustproof stopper.
Further, the transparent protection cover covers in the middle the surface of activity panel, just the medial surface edge of transparent protection cover is provided with sealed absorption packing ring.
Furthermore, four edges outside the shell are of a fillet structure, and are fixedly wrapped with wrapping edges.
Furthermore, the rear ends of the two side faces of the shell and the lining protection shell are symmetrically provided with through hole groups, and the through hole groups are uniformly distributed in a matrix structure.
Furthermore, the anti-seismic plates are fixedly connected to the top surface and the bottom surface of the inner wall surface of the shell, are made of silica gel and are of a sine wave structure.
Furthermore, the automatic alarm components are provided with a plurality of automatic alarm components, and the automatic alarm components are uniformly distributed on the left side surface and the right side surface of the inner wall surface of the shell through the mounting seats.
Furthermore, the diameter of the groove is smaller than that of the contact, an elastic gasket is arranged at the notch of the groove, and the elastic gasket is made of insulating anti-interference rubber.
The beneficial effects of the utility model are embodied in:
in the utility model, the anti-seismic plates of the sine wave structure made of silica gel materials are fixedly arranged on the top surface and the bottom surface of the inner wall surface of the casing, thereby not only increasing the friction degree between the outer wall surface of the lining protective shell and the inner wall surface of the casing and ensuring safety and stability, but also furthest relieving the vibration and shake of the lining protective shell in the longitudinal direction of the casing, and a plurality of automatic alarm components are uniformly distributed on the left side surface and the right side surface of the inner wall surface of the casing, after the equipment is powered on, if large-amplitude vibration in the transverse direction occurs, the lining protective shell can extrude the contact, the contact is mutually contacted with the cathode conductive layer arranged in the mounting seat through the anode conductive layer arranged on the bottom surface of the contact to be powered on, the conductive chip is automatically awakened, the conduction chip automatically sends an alarm signal to an alarm or a mobile phone remote end installed outside, safety warning is given to workers, and further damage to the device is prevented.
The utility model discloses in, match each other through slide rail and slider, the inside lining protective housing has been cup jointed in the inside activity of casing to install various electrical elements inside the inside lining protective housing, both realized duplicate protection, the staff of being convenient for again takes the inside lining protective housing out and carries out maintenance work, press from both sides respectively in the inside of casing and inside lining protective housing simultaneously and be equipped with thin metal mesh interference rejection layer and glass fiber interference rejection layer, furthest realizes offsetting of electromagnetic induction interference among the external work environment, the interference reduction influences.
Drawings
Fig. 1 is a schematic view of the overall structure of an embodiment of the present invention.
Fig. 2 is a schematic view of an overall structure of a mounting panel according to an embodiment of the present invention.
Fig. 3 is a sectional view of the inside of the housing according to an embodiment of the present invention.
Fig. 4 is a schematic view of the overall structure of the automatic alarm assembly according to an embodiment of the present invention.
Fig. 5 is a perspective view of an automatic alarm assembly in accordance with an embodiment of the present invention.
The components in the drawings are labeled as follows: 1. installing a panel; 101. a countersunk hole; 102. slip-resistant stripes; 2. a movable panel; 201. a liquid crystal display screen; 202. a soft board signal lamp group; 203. a contrast adjustment knob; 204. an indicator light set; 205. a reset switch; 206. an operation key group; 207. manually opening and closing the brake; 208. rotating the hinge; 209. an external port; 2010. fixing screws; 3. a transparent protective cover; 301. connecting the shaft sleeve; 302. sealing the adsorption gasket; 4. a fixed shaft; 5. a housing; 501. edge covering; 502. a fine metal mesh anti-interference layer; 503. a slide rail; 6. a lining protective shell; 601. a glass fiber anti-interference layer; 602. a slider; 7. an automatic alarm assembly; 701. a contact; 702. a mounting seat; 703. a groove; 704. an anode conductive layer; 705. an elastic washer; 706. a cathode conductive layer; 707. a conductive chip; 8. a seismic plate; 9. and (4) a through hole group.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, "a plurality" means two or more. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
See fig. 1-5.
The utility model relates to a stand-by power supply automatic switching device convenient to improve safety and stability, including installation panel 1, casing 5, inside lining protective housing 6 and automatic alarm component 7, casing 5 is fixed to link up in installation panel 1 back, inside lining protective housing 6 activity cup joints in the inside center of casing 5, automatic alarm component 7 sets up between casing 5 and inside lining protective housing 6;
the installation panel comprises an installation panel 1, a movable panel 2 is rotatably installed on one side of the axis of the front end face of the installation panel 1 through a rotating hinge 208 arranged on the installation panel, the movable panel 2 is embedded on the installation panel 1 in the middle, a liquid crystal display 201 and an operation key set 206 are respectively arranged at the upper end and the lower end of the axis of the front end face of the movable panel 2, a soft board signal lamp set 202 and a manual opening and closing brake 207 are respectively arranged on two sides of the axis of the front end face of the movable panel 2, a fixed shaft 4 is arranged on the upper end of the movable panel 2 and located on the upper end edge of the installation panel 1, and a transparent protective cover 3 is movably installed at two side ends of the fixed shaft 4 through a connecting shaft sleeve 301 arranged on the fixed shaft;
the inner parts of the casing 5 and the lining protection shell 6 are respectively clamped with a thin metal mesh anti-interference layer 502 and a glass fiber anti-interference layer 601, four edges of the inner wall surface of the casing 5 are respectively fixed with a sliding rail 503, four edges of the outer wall surface of the lining protection shell 6 are respectively fixed with a sliding piece 602, the sliding rail 503 and the sliding piece 602 are mutually matched, an anti-seismic plate 8 is longitudinally arranged between the joint parts of the casing 5 and the lining protection shell 6, and an automatic alarm assembly 7 is transversely arranged;
the automatic alarm component 7 comprises a contact 701, a mounting seat 702 and a conducting chip 707, wherein the contact 701 is movably mounted on the upper end face of the mounting seat 702 through a groove 703 formed in the mounting seat 702, an anode electric conduction layer 704 is arranged on the bottom face of the contact 701, the conducting chip 707 is mounted inside the mounting seat 702, and a cathode electric conduction layer 706 is arranged at the top end of the conducting chip 707.
In the utility model, the anti-seismic plates of the sine wave structure made of silica gel materials are fixedly arranged on the top surface and the bottom surface of the inner wall surface of the casing, thereby not only increasing the friction degree between the outer wall surface of the lining protective shell and the inner wall surface of the casing and ensuring safety and stability, but also furthest relieving the vibration and shake of the lining protective shell in the longitudinal direction of the casing, and a plurality of automatic alarm components are uniformly distributed on the left side surface and the right side surface of the inner wall surface of the casing, after the equipment is powered on, if large-amplitude vibration in the transverse direction occurs, the lining protective shell can extrude the contact, the contact is mutually contacted with the cathode conductive layer arranged in the mounting seat through the anode conductive layer arranged on the bottom surface of the contact to be powered on, the conductive chip is automatically awakened, the conduction chip automatically sends an alarm signal to an alarm or a mobile phone remote end installed outside, safety warning is given to workers, and further damage to the device is prevented.
The utility model discloses in, match each other through slide rail and slider, the inside lining protective housing has been cup jointed in the inside activity of casing to install various electrical elements inside the inside lining protective housing, both realized duplicate protection, the staff of being convenient for again takes the inside lining protective housing out and carries out maintenance work, press from both sides respectively in the inside of casing and inside lining protective housing simultaneously and be equipped with thin metal mesh interference rejection layer and glass fiber interference rejection layer, furthest realizes offsetting of electromagnetic induction interference among the external work environment, the interference reduction influences.
In an embodiment, countersunk holes 101 are symmetrically formed in two sides of the mounting panel 1, the countersunk holes 101 are provided with a plurality of anti-slip stripes 102, and anti-slip stripes 102 are uniformly distributed between adjacent countersunk holes 101 on one side, and the anti-slip stripes 102 are in a convex structure. Due to the design, the installation panel 1 is conveniently limited and installed by the worker through the counter sink 101, the installation panel is firm and not easy to loosen, and meanwhile the anti-slip stripes 102 effectively play a role in wear resistance and skid resistance, so that the worker can conveniently install and carry the installation panel.
In an embodiment, the cross-sectional area of the movable panel 2 is the same as the cross-sectional area of the housing 5, and the movable panel 2 is fixedly connected to the mounting panel 1 by a fixing screw 2010 disposed at one side of the axis. Design like this, spatial structure is reasonable, helps the staff direct along it is right to rotate hinge 208 on the mounting panel 1 activity panel 2 carries out the rotary switch action, can directly utilize simultaneously fixed screw 2010 is tightly locked and is locked for the staff is in the actual maintenance in-process, and the installation is dismantled convenient and fast, and the operation field of vision is wide in range.
In one embodiment, an indicator light set 204 is disposed between the liquid crystal display 201 and the operation key set 206, and a contrast adjustment knob 203 is mounted on one side of the liquid crystal display 201. By the design, the operating states of operation, maintenance, abnormity, charging state, tripping and closing of the device are directly displayed by the indicating lamp set 204, so that the maintenance work of workers is facilitated, and the display frequency of the liquid crystal display screen 201 is adjusted by the contrast adjusting knob 203, so that the device is freely suitable for different working environments.
In an embodiment, a reset switch 205 is disposed at the lower end of the flexible board signal lamp set 202, an external port 209 is installed at the upper end of the manual opening/closing switch 207, and a dust plug is movably installed on the outer surface of the external port 209. By the design, the device can be manually reset in real time, aging and loss of equipment are reduced, and the device can be directly connected with external electrical equipment, so that the practicability is improved.
In an embodiment, the transparent protection cover 3 covers the outer surface of the movable panel 2 in the center, and the inner side edge of the transparent protection cover 3 is provided with a sealing adsorption gasket 302. Design like this, increase the gas tightness, help right various electric original fittings and the function original paper that inlay on the activity panel 2 and install carry out safety protection, avoid long-term various precision fittings after using to receive steam erosion or chemical pollution in the complex environment, also prevent that the staff accident from colliding activity panel 2 and cause the maloperation.
In an embodiment, four outer edges of the housing 5 are rounded off, and the edge 501 is fixedly wrapped thereon. Design like this, the structure is slick and sly, increases the smooth degree of the device at switch board internally mounted.
In an embodiment, the rear ends of the two side surfaces of the casing 5 and the lining protection shell 6 are symmetrically provided with through hole groups 9, and the through hole groups 9 are uniformly distributed in a matrix structure. By the design, the heat dissipation and volatilization performance of the device is effectively improved, and the silencing holes are formed by the plurality of fine through holes in the through hole group 9, so that the noise reduction and silencing effects are achieved.
In an embodiment, the anti-vibration plates 8 are fixedly connected to the top surface and the bottom surface of the inner wall surface of the casing 5, and the anti-vibration plates 8 are made of silica gel and have a sine wave structure. By the design, the friction degree of the lining protection shell 6 inside the shell 5 is increased, safety and stability are achieved, and vibration of the shell 5 and the lining protection shell 6 in the longitudinal direction is relieved to the maximum extent.
In one embodiment, the number of the automatic alarm components 7 is multiple, and the automatic alarm components 7 are uniformly distributed on the left and right sides of the inner wall surface of the housing 5 through the mounting seats 702. Design like this, after the device circular telegram, if the vibrations in horizontal position appear, work as inside lining protective housing 6 extrudees behind automatic alarm subassembly 7, realize the autoalarm function, in time remind for the staff, avoid taking place the safety accident.
In one embodiment, the diameter of the groove 703 is smaller than that of the contact 701, and an elastic gasket 705 is disposed at the notch of the groove 703, and the elastic gasket 705 is made of an insulating anti-interference rubber material. Due to the design, the contact 701 is elastically limited, so that the contact 701 is prevented from falling off accidentally, and meanwhile, the influence of the anode conductive layer 704 arranged on the bottom surface of the contact 701 is avoided.
It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the present invention, and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this application.

Claims (11)

1. The utility model provides a stand-by power supply auto-switch device convenient to improve safety and stability nature which characterized in that: the anti-theft alarm device comprises an installation panel (1), a casing (5), a lining protection shell (6) and an automatic alarm component (7), wherein the casing (5) is fixedly connected to the back of the installation panel (1), the lining protection shell (6) is movably sleeved in the center of the inside of the casing (5), and the automatic alarm component (7) is arranged between the casing (5) and the lining protection shell (6);
the mounting panel is characterized in that a movable panel (2) is rotatably mounted on one side of the axis of the front end face of the mounting panel (1) through a rotating hinge (208) arranged on the mounting panel, the movable panel (2) is embedded in the middle of the mounting panel (1), the upper end and the lower end of the axis of the front end face of the movable panel (2) are respectively provided with a liquid crystal display (201) and an operation key set (206), the two sides of the axis of the front end face of the movable panel (2) are respectively provided with a soft board signal lamp set (202) and a manual opening and closing brake (207), the upper portion of the movable panel (2) is located on the upper end edge of the mounting panel (1) and is provided with a fixed shaft (4), and the two side ends of the fixed shaft (4) are movably mounted with a transparent protective cover (3) through a connecting shaft sleeve (301) arranged on the fixed shaft;
a fine metal mesh anti-interference layer (502) and a glass fiber anti-interference layer (601) are respectively clamped in the casing (5) and the lining protective shell (6), sliding rails (503) are fixed on four edges of the inner wall surface of the casing (5), sliding pieces (602) are fixed on four edges of the outer wall surface of the lining protective shell (6), the sliding rails (503) and the sliding pieces (602) are mutually matched, an anti-seismic plate (8) is longitudinally arranged between the joint of the casing (5) and the lining protective shell (6), and an automatic alarm assembly (7) is transversely arranged;
the automatic alarm component (7) comprises a contact (701), a mounting seat (702) and a conducting chip (707), wherein the contact (701) is movably mounted on the upper end face of the mounting seat (702) through a groove (703) formed in the upper end face of the mounting seat, the bottom face of the contact (701) is provided with an anode electric conduction layer (704), the conducting chip (707) is mounted in the mounting seat (702), and the top end of the conducting chip (707) is provided with a cathode electric conduction layer (706).
2. The backup power source auto-switching device according to claim 1, wherein: the anti-slip mounting structure is characterized in that countersunk holes (101) are symmetrically formed in two sides of the mounting panel (1), the plurality of countersunk holes (101) are provided, anti-slip stripes (102) are uniformly distributed between the countersunk holes (101) adjacent to one side of each countersunk hole, and the anti-slip stripes (102) are of a protruding structure.
3. The backup power source auto-switching device according to claim 1, wherein: the cross section area of the movable panel (2) is the same as that of the casing (5), and the movable panel (2) is fixedly connected with the mounting panel (1) through a fixing screw (2010) arranged on one side of the axis.
4. The backup power source auto-switching device according to claim 1, wherein: an indicator lamp set (204) is arranged between the liquid crystal display screen (201) and the operation key set (206), and a contrast adjusting knob (203) is installed on one side of the liquid crystal display screen (201).
5. The backup power source auto-switching device according to claim 1, wherein: the lower extreme of soft board signal lamp group (202) is provided with reset switch (205), external port (209) are installed to the upper end of manual divide-shut brake (207), just external port (209) surface movable mounting has dustproof stopper.
6. The backup power source auto-switching device according to claim 1, wherein: transparent protection cover (3) cover between two parties the surface of activity panel (2), just the medial surface edge of transparent protection cover (3) is provided with sealed absorption packing ring (302).
7. The backup power source auto-switching device according to claim 1, wherein: four edges of the outer portion of the shell (5) are of a rounded corner structure, and the four edges are fixedly wrapped with wrapping edges (501).
8. The backup power source auto-switching device according to claim 1, wherein: both sides face rear end of casing (5) and inside lining protective housing (6) all the symmetry be provided with through-hole group (9), just through-hole group (9) are matrix structure evenly distributed.
9. The backup power source auto-switching device according to claim 1, wherein: the anti-seismic plate (8) is fixedly connected to the top surface and the bottom surface of the inner wall surface of the shell (5), and the anti-seismic plate (8) is made of silica gel and is of a sine wave structure.
10. The backup power source auto-switching device according to claim 1, wherein: the automatic alarm components (7) are provided with a plurality of automatic alarm components (7), and the automatic alarm components (7) are uniformly distributed on the left side surface and the right side surface of the inner wall surface of the machine shell (5) through the mounting seats (702).
11. The backup power source auto-switching device according to claim 1, wherein: the diameter of the groove (703) is smaller than that of the contact (701), an elastic gasket (705) is arranged at the notch of the groove (703), and the elastic gasket (705) is made of insulating anti-interference rubber.
CN202022754519.2U 2020-11-23 2020-11-23 Standby power supply automatic switching device convenient for improving safety and stability Active CN213937529U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022754519.2U CN213937529U (en) 2020-11-23 2020-11-23 Standby power supply automatic switching device convenient for improving safety and stability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022754519.2U CN213937529U (en) 2020-11-23 2020-11-23 Standby power supply automatic switching device convenient for improving safety and stability

Publications (1)

Publication Number Publication Date
CN213937529U true CN213937529U (en) 2021-08-10

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Application Number Title Priority Date Filing Date
CN202022754519.2U Active CN213937529U (en) 2020-11-23 2020-11-23 Standby power supply automatic switching device convenient for improving safety and stability

Country Status (1)

Country Link
CN (1) CN213937529U (en)

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