Power supply protection change-over switch device

Abstract

The invention discloses a power supply protection change-over switch device which comprises a bottom frame, mounting plates are fixedly connected to the left end and the right end of the bottom frame, two symmetrically-distributed kidney-shaped holes are formed in the surface of each mounting plate, and two symmetrically-distributed gaskets are in contact with the upper end of each mounting plate. The inner wall of each gasket is movably connected with a bolt, the bolts penetrate through the kidney-shaped holes, the upper end of the bottom frame is fixedly connected with a change-over switch shell, three evenly-distributed wiring terminals are arranged in the change-over switch shell, and each wiring terminal makes contact with the corresponding heat conduction pad. The invention relates to a power supply protection change-over switch device, which not only has the functions of arranging and storing electric wires and cables and avoiding the problems of loosening and scattering of the electric wires and the cables, but also can perform temperature protection treatment on a change-over switch so as to ensure that the change-over switch has the characteristics of use reliability and long service life.

Description

Technical Field

[0001] This invention belongs to the field of switching technology, specifically a power supply switching device. Background Technology

[0002] Automatic transfer switch (ATS) is a crucial electrical device that automatically switches the load circuit from one primary power source (such as mains power) to another (such as a backup power source, such as a generator) when the normal power supply fails (e.g., power outage, abnormal voltage). Once the primary power supply is restored, it automatically switches the load back to the primary power supply. ATS (Automatic Power Supply) is widely used in any location where prolonged power outages are not permitted: Public buildings: hospitals, airports, train stations, stadiums, data centers. Commercial facilities: large shopping malls, luxury hotels, banks, stock exchanges. Industrial production: automated production lines, chemical plants, communication base stations. Residential communities: elevators, fire protection systems, water pumps, etc. in high-rise residential buildings. Infrastructure: highway tunnels, municipal facilities.

[0003] A safety power supply switching switch is disclosed in the utility model patent with patent authorization announcement number CN220710160U, including a protective cover, a rotary switch mechanism and a safety mechanism; the protective cover has evenly distributed clearance openings on its front side, a support shaft is fixedly connected between the left side and the right side of the inner wall of the protective cover, the support shaft is installed in conjunction with the clearance openings, evenly distributed friction rings are fixedly sleeved on the outer surface of the support shaft, the friction rings are installed in conjunction with the clearance openings, a fixed platform is opened at the front end of the bottom wall of the protective cover, a wire harness connecting plate is fixedly connected to the right side of the protective cover, and a current output port is fixedly connected to the middle of the rear wall of the protective cover.

[0004] However, the existing power supply switching devices also have certain shortcomings. First, although the existing power supply switching devices mostly use terminals to install and use cables and wires, the length of the cables and wires themselves, vibration and impact can easily cause the cables and wires to become scattered and loose. Secondly, although existing power supply switching devices mostly employ heat dissipation ducts to cool the internal electronic components, inadequate heat dissipation can lead to poor heat dissipation efficiency. Therefore, improvements to the existing technology are necessary. Summary of the Invention The purpose of this invention is to provide a power supply switching device to solve the above-mentioned problems, thereby resolving the issues mentioned in the background art.

[0005] To address the above problems, the present invention provides a technical solution: A power supply switching device includes a base frame, with mounting plates fixedly connected to both the left and right ends of the base frame. Each mounting plate has two symmetrically distributed slots on its surface. Each mounting plate has two symmetrically distributed gaskets at its upper end. A bolt is movably connected to the inner wall of each gasket, passing through the slots. A switching device housing is fixedly connected to the upper end of the base frame. The switching device housing has three evenly distributed terminals inside, each contacting a thermal pad. Three evenly distributed circuit breakers are located on the front of the switching device housing. Multiple evenly distributed heat dissipation grooves are located on both the left and right ends of the switching device housing. A cable management mechanism is located on the front of the switching device housing, and a protective mechanism is located on the back of the switching device housing.

[0006] Preferably, a thermal pad is fixedly connected to the inner wall of the base frame, and a plurality of evenly distributed heat dissipation fins are fixedly connected to the top inner side of the base frame. Each heat dissipation fin is in contact with the thermal pad. Through the combined use of the thermal pad, heat dissipation fins and other structures, the residual heat and residual temperature generated by the electronic components inside the switching switch can be conducted and dissipated.

[0007] Preferably, the cable management mechanism includes a fixed frame, which is fixedly connected to the front of the switch housing. The fixed frame has a clearance groove on its front. Three evenly distributed rotating columns are rotatably connected to the inner wall of the fixed frame. A support plate is fixedly connected to the upper end of each rotating column, and the support plate contacts the bottom inner side of the clearance groove. Two evenly distributed cable management rods are fixedly connected to the upper end of the support plate, and each cable management rod contacts the top inner side of the clearance groove. A rotating disk is fixedly sleeved on the outer side of each rotating column, and the rotating disk is rotatably connected to the fixed frame. An end plate is fixedly connected to the lower end of each rotating column. The end plate facilitates the rotation of the rotating column, causing the support plate to rotate the cable management rods, enabling the winding and management of long wires and cables.

[0008] Preferably, the rotating disk has multiple limiting holes arranged in a circular array on its side. A fixing plate is fixedly connected to the lower end of the fixing frame. A limiting rod is slidably connected to the inner wall of the fixing plate. The limiting rod is slidably connected to one of the limiting holes. An end buckle is fixedly connected to the left end of the limiting rod. The end buckle is slidably connected to the fixing frame. A spring is provided on the outer side of the limiting rod. One end of the spring is fixedly connected to the end buckle, and the other end of the spring is fixedly connected to the fixing plate. Through the cooperation of the limiting holes and the limiting rod, the rotating disk can be inserted and used, so that the rotating disk drives the rotating column to be stable, thereby making the cable management rod drive the wires and cables to be in a stable state.

[0009] Preferably, the upper end of the fixing frame is fixedly connected to two symmetrically distributed triangular plates, and the long right-angle side of each triangular plate is fixedly connected to the housing of the switching switch. By setting the triangular plates, the fixing frame can be reinforced to ensure the long-term stability of the fixing frame.

[0010] Preferably, the protection mechanism includes a cooling fan. The cooling fan is installed on the inner wall of the switch housing. A washer is fixedly connected to the back of the switch housing, and the back of the washer contacts a flow shell. Two evenly distributed fixing ears are fixedly connected to the side of the flow shell. A plug rod is fixedly connected to the inner wall of each fixing ear. The plug rod is slidably connected to the switch housing. Two symmetrically distributed connecting pieces are fixedly connected to the back of the switch housing. A limit pin is slidably connected to the inner wall of each connecting piece. The limit pin is slidably connected to the plug rod. An end piece is fixedly connected to the upper end of the limit pin. A second spring is provided on the outer side of the limit pin. One end of the second spring is fixedly connected to the end piece, and the other end of the second spring is fixedly connected to the connecting piece. By setting the fixing ears and plug rods, the flow shell can be inserted. With the cooperation of the limit pins and the second spring, the plug rod can be limited, so that the flow shell is in a stable installation position.

[0011] Preferably, a movable ring is slidably connected to the inner wall of the flow shell, a filter screen is fixedly connected to the inner wall of the movable ring, a protrusion is fixedly connected to the surface of the filter screen, a reinforcing plate is fixedly connected to the back of the flow shell, a rotating rod is rotatably connected to the inner wall of the reinforcing plate, two symmetrically distributed limiting discs are fixedly sleeved on the outer side of the rotating rod, each limiting disc is rotatably connected to the reinforcing plate, a pressing rod is fixedly connected to the end face of the rotating rod, the pressing rod contacts the protrusion, a rotating sleeve is fixedly sleeved on the outer side of the rotating rod, and four contact rods arranged in a circular array are fixedly connected to the side of the rotating sleeve. Through the setting of the filter screen, dust and other particulate impurities in the air can be filtered out. With the cooperation of the rotating rod, pressing rod, protrusion and other structures, the filter screen can be moved to vibrate and clean the dust and other particles attached to the filter screen.

[0012] Preferably, the inner wall of the flow shell is fixedly connected with four mounting plates arranged in a ring array. Each mounting plate is fixedly connected with a spring three. The other end of the spring three is fixedly connected to the moving ring. Through the cooperation of the spring three and the mounting plates, the moving ring can be connected and used. With the deformation of the spring three, the moving ring can move back and forth, thereby driving the filter screen to vibrate.

[0013] The beneficial effects of this invention are as follows: This invention relates to a power supply switching device, which not only has the function of organizing and storing wires and cables to avoid the problems of loosening and tangling of wires and cables, but also provides temperature protection for the switching device to ensure that the switching device has the characteristics of reliability and long service life. Compared with traditional power supply switching devices, it has the following beneficial effects: Firstly, by setting up a cable management mechanism, fixing frame, triangular plate, clearance groove, rotating column, support plate, cable management rod, rotating disk, end plate, limiting hole, fixing plate, limiting rod, end buckle, spring and other structures, the end plate facilitates the rotation of the rotating column, which in turn causes the support plate to drive the cable management rod to rotate, for winding and managing long wires and cables. The limiting hole and limiting rod work together to allow the rotating disk to be inserted, so that the rotating disk drives the rotating column to be stable, which in turn allows the cable management rod to drive the wires and cables to be in a stable state.

[0014] Secondly, through the protective mechanism, cooling fan, gasket, flow shell, fixing ear, insertion rod, connecting piece, limit pin, end piece, spring two, moving ring, filter screen, mounting piece, spring three, protrusion, reinforcing piece, rotating rod, limit plate, squeezing rod, and rotating sleeve, the flow shell can be inserted through the fixing ear and insertion rod. With the cooperation of the limit pin and spring two, the insertion rod can be limited, so that the flow shell is installed stably. The filter screen can filter out dust and other particulate impurities in the air. With the cooperation of the rotating rod, squeezing rod, and protrusion, the filter screen can be moved to vibrate and clean the dust and other impurities attached to the filter screen. Attached Figure Description For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0015] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 For the present invention Figure 1 The right view; Figure 3 For the present invention Figure 1 A bottom view; Figure 4 For the present invention Figure 1 The left view; Figure 5 For the present invention Figure 4 A schematic diagram of the internal structure of the confined flow shell; Figure 6 For the present invention Figure 3 Enlarged view of the rotating disk; Figure 7 For the present invention Figure 4 enlarged protection mechanism Figure 1 ; Figure 8 For the present invention Figure 5 enlarged protection mechanism Figure 2 .

[0016] In the diagram: 1. Base frame; 2. Mounting plate; 3. Waist hole; 4. Gasket; 5. Bolt; 6. Thermal pad; 7. Heat dissipation fins; 8. Switch housing; 9. Terminal block; 10. Circuit breaker; 11. Heat dissipation groove; 12. Cable management mechanism; 14. Protection mechanism; 120. Fixing bracket; 121. Triangular plate; 122. Clearance groove; 123. Rotating column; 124. Support plate; 125. Cable management rod; 126. Rotating disk; 127. End plate; 128. Limiting hole; 129. Fixing plate; 130. Limiting rod; 131. End buckle; 132. Spring 1; 140. Cooling fan; 141. Washer ring; 142. Flow shell; 143. Fixing ear; 144. Insert rod; 145. Connecting piece; 146. Limiting pin; 147. End piece; 148. Spring 2; 149. Moving ring; 150. Filter screen; 151. Mounting piece; 152. Spring 3; 153. Protrusion; 154. Reinforcing piece; 155. Rotating rod; 156. Limiting plate; 157. Pressing rod; 158. Rotating sleeve. Detailed Implementation like Figure 1-8 As shown, the specific implementation adopts the following technical solution: Example: A power supply switching device includes a base frame 1, with mounting plates 2 fixedly connected to both the left and right ends of the base frame 1. Each mounting plate 2 has two symmetrically distributed oblong holes 3 on its surface. The upper end of each mounting plate 2 contacts two symmetrically distributed gaskets 4. Each gasket 4 has a bolt 5 movably connected to its inner wall, passing through the oblong holes 3. A switching housing 8 is fixedly connected to the upper end of the base frame 1. The switching housing 8 has three evenly distributed terminals 9 inside, each of which contacts a heat-conducting pad 6. The front of the switching housing 8 has three evenly distributed circuit breakers 10. The left and right ends of the switching housing 8 each have multiple evenly distributed heat dissipation grooves 11. The front of the switching housing 8 has a cable management mechanism 12, and the back of the switching housing 8 has a protection mechanism 14.

[0017] The base frame 1 has a heat-conducting pad 6 fixedly connected to its inner side wall, and a plurality of evenly distributed heat dissipation fins 7 fixedly connected to the top inner side of the base frame 1. Each heat dissipation fin 7 is in contact with the heat-conducting pad 6. Through the combined use of the heat-conducting pad 6, heat dissipation fins 7 and other structures, the residual heat and residual temperature generated by the electronic components inside the switching switch can be conducted and dissipated.

[0018] The cable management mechanism 12 includes a fixing frame 120. The fixing frame 120 is fixedly connected to the front of the switch housing 8. Two symmetrically distributed triangular plates 121 are fixedly connected to the upper end of the fixing frame 120. The long right-angle side of each triangular plate 121 is fixedly connected to the switch housing 8. The triangular plates 121 are used to reinforce the fixing frame 120 to ensure its long-term stability. The front of the fixing frame 120 has a clearance groove 122. Three evenly distributed rotating columns 123 are rotatably connected to the inner wall of the fixing frame 120. A support plate 1 is fixedly connected to the upper end of each rotating column 123. 24. The support plate 124 contacts the inner bottom of the clearance groove 122. Two evenly distributed cable management rods 125 are fixedly connected to the upper end of the support plate 124. Each cable management rod 125 contacts the inner top of the clearance groove 122. A rotating disk 126 is fixedly sleeved on the outer side of each rotating column 123. The rotating disk 126 is rotatably connected to the fixing frame 120. An end plate 127 is fixedly connected to the lower end of each rotating column 123. The end plate 127 facilitates the rotation of the rotating column 123, so that the support plate 124 drives the cable management rods 125 to rotate, for winding and managing long wires and cables.

[0019] The rotating disk 126 has multiple limiting holes 128 arranged in a circular array on its side. A fixing plate 129 is fixedly connected to the lower end of the fixing frame 120. A limiting rod 130 is slidably connected to the inner wall of the fixing plate 129. The limiting rod 130 is slidably connected to one of the limiting holes 128. An end buckle 131 is fixedly connected to the left end of the limiting rod 130. The end buckle 131 is slidably connected to the fixing frame 120. A spring 132 is provided on the outer side of the limiting rod 130. One end of the spring 132 is fixedly connected to the end buckle 131, and the other end of the spring 132 is fixedly connected to the fixing plate 129. Through the cooperation of the limiting holes 128 and the limiting rod 130, the rotating disk 126 can be inserted and used, so that the rotating disk 126 drives the rotating column 123 to be stable, thereby making the cable management rod 125 drive the wires and cables to be stable.

[0020] The protection mechanism 14 includes a cooling fan 140. The cooling fan 140 is installed on the inner wall of the switch housing 8. A washer 141 is fixedly connected to the back of the switch housing 8. The back of the washer 141 contacts a flow shell 142. Two evenly distributed fixing ears 143 are fixedly connected to the side of the flow shell 142. A plug rod 144 is fixedly connected to the inner wall of each fixing ear 143. The plug rod 144 is slidably connected to the switch housing 8. Two symmetrically distributed connecting pieces 145 are fixedly connected to the back of the switch housing 8. Each connecting piece 145... The inner wall is slidably connected with a limiting pin 146, which is slidably connected to the insertion rod 144. The upper end of the limiting pin 146 is fixedly connected to an end piece 147, and a second spring 148 is provided on the outer side of the limiting pin 146. One end of the second spring 148 is fixedly connected to the end piece 147, and the other end of the second spring 148 is fixedly connected to the connecting piece 145. With the setting of the fixing ear 143 and the insertion rod 144, the flow shell 142 can be inserted. With the cooperation of the limiting pin 146 and the second spring 148, the insertion rod 144 can be limited, so that the flow shell 142 is in a stable installation position.

[0021] The inner wall of the flow shell 142 is slidably connected to a movable ring 149, and a filter screen 150 is fixedly connected to the inner wall of the movable ring 149. A protrusion 153 is fixedly connected to the surface of the filter screen 150. A reinforcing plate 154 is fixedly connected to the back of the flow shell 142. A rotating rod 155 is rotatably connected to the inner wall of the reinforcing plate 154. Two symmetrically distributed limiting discs 156 are fixedly sleeved on the outer side of the rotating rod 155. Each limiting disc 156 is rotatably connected to the reinforcing plate 154. A pressing rod 157 is fixedly connected to the end face of the 5. The pressing rod 157 contacts the protrusion 153. A rotating sleeve 158 is fixedly sleeved on the outside of the rotating rod 155. Four contact rods arranged in a circular array are fixedly connected to the side of the rotating sleeve 158. Through the setting of the filter screen 150, dust and other particulate impurities in the air can be filtered out. With the cooperation of the rotating rod 155, the pressing rod 157, the protrusion 153 and other structures, the filter screen 150 can be moved to vibrate and clean the dust and other particles attached to the filter screen 150.

[0022] The inner wall of the flow shell 142 is fixedly connected to four mounting pieces 151 arranged in a ring array. Each mounting piece 151 is fixedly connected to a spring 152. The other end of the spring 152 is fixedly connected to the moving ring 149. Through the cooperation of the spring 152 and the mounting pieces 151, the moving ring 149 can be connected and used. With the deformation of the spring 152, the moving ring 149 can move back and forth, thereby driving the filter screen 150 to vibrate.

[0023] The invention is used as follows: When in use, by passing long wires and cables through two adjacent cable management rods 125 and pulling the end buckle 131 to the left, the limiting rod 130 slides along the inner wall of the fixing plate 129, causing the spring 132 to deform. Finally, the limiting rod 130 disengages from the limiting hole 128, which can push the end plate 127 to rotate, thereby driving the rotating column 123 to rotate. This causes the support plate 124 to drive the cable management rod 125 to rotate, allowing the wires and cables to be managed and stored. The end buckle 131 is then released, allowing the spring 132 to return to its original deformation, and the limiting rod 130 is pulled to insert into the next limiting hole 128 on the surface of the rotating disk 126. The rotating disk 126 is then inserted and used, stabilizing the rotating column 123 and stabilizing the cable management rod 125. Finally, the wires and cables are connected and installed between the wires and cables and the terminal 9. By pulling the end piece 147 upward, the limiting pin 146 slides along the inner wall of the connecting piece 145, causing the second spring 148 to deform. This pushes the flow shell 142 into contact with the washer ring 141, causing the fixing ear 143 to drive the insertion rod 144 into the switch housing 8, limiting the flow shell 142. The end piece 147 is then released, allowing the second spring 148 to return to its original shape, pulling the limiting pin 146 through the insertion rod 144 to limit the insertion rod 144, thus ensuring a stable connection for the flow shell 142. The heat dissipation groove 11 ensures normal airflow inside the switch housing 8. The cooling fan 140 blows air into the switch housing 8, and the heat-conducting pad 6 and heat dissipation fins 7 conduct and dissipate residual heat and high temperatures generated by the electronic components inside the switch housing 8. The filter 150 filters out dust and other particulate impurities from the airflow, preventing contamination of subsequent equipment. The rotating sleeve 158 rotates, causing the rotating rod 155 to rotate, which in turn causes the pressing rod 157 to press against the protrusion 153. This causes the protrusion 153 to move the filter 150, which in turn causes the moving ring 149 to deform the spring 152. When the pressing rod 157 disengages from the protrusion 153, the spring 152 returns to its original shape, pushing the moving ring 149 to reset the filter 150. This cycle repeats, allowing the filter 150 to vibrate and remove dust, preventing clogging.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A power supply switching device, comprising a base frame (1), characterized in that: Mounting plates (2) are fixedly connected to the left and right ends of the base frame (1). Two symmetrically distributed waist holes (3) are opened on the surface of each mounting plate (2). Two symmetrically distributed gaskets (4) are in contact with the upper end of each mounting plate (2). Bolts (5) are movably connected to the inner wall of each gasket (4). The bolts (5) pass through the waist holes (3). A switch housing (8) is fixedly connected to the upper end of the base frame (1). Three evenly distributed wiring terminals (9) are provided inside the switch housing (8). Each wiring terminal (9) is in contact with a heat-conducting pad (6). Three evenly distributed circuit breakers (10) are provided on the front of the switch housing (8). Multiple evenly distributed heat dissipation grooves (11) are opened on the left and right ends of the switch housing (8). A cable management mechanism (12) is provided on the front of the switch housing (8). A protection mechanism (14) is provided on the back of the switch housing (8).

2. The power supply switching device according to claim 1, characterized in that: A heat-conducting pad (6) is fixedly connected to the inner wall of the base frame (1), and a plurality of evenly distributed heat dissipation fins (7) are fixedly connected to the top inner side of the base frame (1), and each heat dissipation fin (7) is in contact with the heat-conducting pad (6).

3. The power supply switching device according to claim 1, characterized in that: The cable management mechanism (12) includes a fixed frame (120). The fixed frame (120) is fixedly connected to the front of the switch housing (8). The fixed frame (120) has a clearance groove (122) on its front. The inner wall of the fixed frame (120) is rotatably connected to three evenly distributed rotating columns (123). Each rotating column (123) has a support plate (124) fixedly connected to its upper end. The support plate (124) contacts the bottom of the inner side of the clearance groove (122). The upper end of the support plate (124) is fixedly connected to two evenly distributed cable management rods (125). Each cable management rod (125) contacts the top of the inner side of the clearance groove (122). Each rotating column (123) has a rotating disk (126) fixedly sleeved on its outer side. The rotating disk (126) is rotatably connected to the fixed frame (120). Each rotating column (123) has an end plate (127) fixedly connected to its lower end.

4. The power supply switching device according to claim 3, characterized in that: The rotating disk (126) has multiple limiting holes (128) arranged in a ring array on its side. The lower end of the fixing frame (120) is fixedly connected to a fixing plate (129). The inner wall of the fixing plate (129) is slidably connected to a limiting rod (130). The limiting rod (130) is slidably connected to one of the limiting holes (128). The left end of the limiting rod (130) is fixedly connected to an end buckle (131). The end buckle (131) is slidably connected to the fixing frame (120). A spring (132) is provided on the outer side of the limiting rod (130). One end of the spring (132) is fixedly connected to the end buckle (131), and the other end of the spring (132) is fixedly connected to the fixing plate (129).

5. A power supply switching device according to claim 3, characterized in that: The upper end of the fixed frame (120) is fixedly connected to two symmetrically distributed triangular plates (121), and the long right-angle side of each triangular plate (121) is fixedly connected to the switching switch housing (8).

6. The power supply switching device according to claim 1, characterized in that: The protection mechanism (14) includes a cooling fan (140). The cooling fan (140) is provided on the inner wall of the switch housing (8). A washer (141) is fixedly connected to the back of the switch housing (8). The back of the washer (141) contacts a flow shell (142). Two evenly distributed fixing ears (143) are fixedly connected to the side of the flow shell (142). A plug rod (144) is fixedly connected to the inner wall of each fixing ear (143). The plug rod (144) is slidably connected to the switch housing (8). Two symmetrically distributed connecting pieces (145) are fixedly connected to the back of the switch housing (8). Each connecting piece (145) has a limit pin (146) slidably connected to its inner wall. The limit pin (146) is slidably connected to the plug rod (144). An end piece (147) is fixedly connected to the upper end of the limit pin (146). A second spring (148) is provided on the outer side of the limit pin (146). One end of the second spring (148) is fixedly connected to the end piece (147), and the other end of the second spring (148) is fixedly connected to the connecting piece (145).

7. The power supply switching device according to claim 6, characterized in that: The inner wall of the flow shell (142) is slidably connected to a movable ring (149), the inner wall of the movable ring (149) is fixedly connected to a filter screen (150), the surface of the filter screen (150) is fixedly connected to a protrusion (153), the back of the flow shell (142) is fixedly connected to a reinforcing plate (154), the inner wall of the reinforcing plate (154) is rotatably connected to a rotating rod (155), the outer side of the rotating rod (155) is fixedly sleeved with two symmetrically distributed limiting discs (156), each of the limiting discs (156) is rotatably connected to the reinforcing plate (154), the end face of the rotating rod (155) is fixedly connected to a pressing rod (157), the pressing rod (157) contacts the protrusion (153), the outer side of the rotating rod (155) is fixedly sleeved with a rotating sleeve (158), the side of the rotating sleeve (158) is fixedly connected to four contact rods arranged in a ring array.

8. A power supply switching device according to claim 7, characterized in that: The inner wall of the flow shell (142) is fixedly connected with four mounting pieces (151) arranged in a ring array. Each mounting piece (151) is fixedly connected with a spring three (152) on its surface. The other end of the spring three (152) is fixedly connected to the moving ring (149).

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