A safety-protected power knife switch

Abstract

The present invention is applicable to the technical field of power knife switches, and provides a safety protection type power knife switch, which includes a base and a protective cover; further includes: a connection module, the connection module includes a wiring board, an installation frame is arranged at the wiring board, a pressing and fixing unit is arranged on one side of the installation frame, an installation turntable is installed in the installation frame, and two winding rods are symmetrically arranged at the bottom of the installation turntable; a driving unit, the driving unit includes a guiding sleeve, a connecting column is arranged in the guiding sleeve, an adjusting turntable is installed on the connecting column, two guiding columns are symmetrically arranged on the side wall of the adjusting turntable, and a spiral guiding groove is opened on the inner wall of the guiding sleeve; an adjusting unit. The operation of the device is simple, and the installation and later maintenance are very convenient, effectively improving the convenience of using the power knife switch. At the same time, the wiring end can be reinforced, so as to improve the protection effect and ensure the stability of the connection.

Description

Technical Field

[0001] The present invention belongs to the technical field of power knife switches, and particularly relates to a safety protection type power knife switch. Background Art

[0002] A power knife switch, also known as a disconnect switch or knife switch, is an electrical device used for manual operation in a power system. It is mainly used to connect or disconnect a circuit under no-load or light-load conditions, so as to ensure an obvious disconnection point when maintaining, repairing or inspecting electrical equipment, thereby ensuring the safety of staff.

[0003] When the existing power knife switch is in use, the external wires are usually directly connected to the terminal on the knife switch, and the fixation of the wires is only achieved by the screws of the terminal. When the wires are pulled externally, the generated traction force will directly act on the connection between the wires and the terminal, easily resulting in loosening of the connection. In addition, during the wiring process, the operator needs to unscrew the screws to achieve wire disconnection and connection, and the installation process is relatively cumbersome. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a safety protection type power knife switch, aiming to solve the problems proposed in the above background art.

[0005] The embodiments of the present invention are implemented as follows. A safety protection type power knife switch includes a base, on which a protective cover is detachably installed. The base is also provided with a power supply line terminal and a knife switch, and a plurality of power supply line terminals are provided, and the number of the support arms of the knife switch is the same as the number of the power supply line terminals. It further includes:

[0006] A connection module, the connection module includes a plurality of wiring boards installed on the base, and the number of the wiring boards is also the same as the number of the power supply line terminals. Each wiring board is correspondingly connected to a support arm of the knife switch. An installation frame is provided at the wiring board. A pressing unit for fixing the wire by pressing is provided on one side of the installation frame close to the incoming line end. An installation turntable is rotatably installed in the installation frame, and two winding rods are symmetrically arranged at the bottom of the installation turntable.

[0007] A driving unit, the driving unit includes a guiding sleeve installed on the installation frame. A connecting column is arranged in the guiding sleeve, and the connecting column is installed on the top of the installation turntable. An adjusting turntable is slidably installed on the connecting column in the vertical direction, and the adjusting turntable is connected to the connecting column through a sliding key. A first spring is further arranged between the adjusting turntable and the installation frame. Two guiding columns are symmetrically arranged on the side wall of the adjusting turntable, and spiral guiding grooves matching the guiding columns are opened on the inner wall of the guiding sleeve.

[0008] Adjusting unit, the adjusting unit is installed inside the protective cover, and a set of adjusting units are provided at the positions corresponding to each wiring board. After the protective cover is installed on the base, the adjusting unit will push the guiding sleeve towards the side close to the mounting turntable, and simultaneously push the pressing unit to press the wire tightly on the wiring board.

[0009] Further technical solution, the pressing unit includes a sliding rod and a pressing block. The sliding rod is installed on the base, and the two sliding rods are symmetrically distributed on both sides of the wiring board. Both ends of the pressing block are slidably installed on a sliding rod, and a second spring is further provided between the pressing block and the base. A pressing groove is formed on the bottom surface of the pressing block.

[0010] Further technical solution, the adjusting unit includes a connecting plate installed inside the protective cover, and a pressing rod and a pressing sleeve are installed on the connecting plate.

[0011] Further technical solution, each connecting plate is installed inside the protective cover through a set of control components, and the control components drive the connecting plate to perform linear movement along the axial direction of the connecting column.

[0012] Further technical solution, the control component includes a guiding rod and an adjusting screw. The guiding rod is installed inside the protective cover, and the connecting plate is slidably installed on the guiding rod. The adjusting screw penetrates the protective cover, and a threaded hole matching the adjusting screw is provided on the protective cover. One end of the adjusting screw located inside the protective cover is rotatably installed on the connecting plate.

[0013] Further technical solution, a placing groove is further formed on the upper surface of each wiring board.

[0014] Further technical solution, a plurality of inlet sleeves are provided at one end of the protective cover close to the wiring board, corresponding to each wiring board respectively.

[0015] Further technical solution, a first indicating line and a second indicating line are further provided at the edge of the side wall of the base, and the distance between the first indicating line and the second indicating line is used to indicate the peeling length of the wire wiring end.

[0016] A safety protection type power knife switch provided by an embodiment of the present invention, when in use, each power line terminal is respectively used to connect to a power source end. Then, after peeling the end of the wire to be connected, it is placed between two winding rods at a designated wiring board. Then, only need to install the protective cover on the base. During the process of installing the protective cover on the base, the pressing sleeve will abut against the adjusting turntable, and the pressing rod will abut against the pressing block. As the protective cover is installed in place, the connecting plate will drive the pressing rod and the pressing sleeve to move towards the side close to the wiring board. By pushing the adjusting turntable towards the side close to the installation turntable through the pressing sleeve, during this process, the guiding column will slide along the spiral guiding groove, so that the adjusting turntable rotates. The adjusting turntable can drive the installation turntable to rotate synchronously through the connecting column, and the installation turntable drives the winding rods to rotate synchronously, so as to wind the end of the wire around the two winding rods. At the same time, the pressing rod will push the pressing block towards the side close to the wiring board, so as to clamp the wire on the wiring board through the pressing groove on the pressing block, that is, the power connection operation is completed. When pulling the wire from the outside, the acting point will be at the pressing block, so as to prevent the external acting force from directly acting on the connection between the wire and the winding rod. Subsequently, only need to toggle the knife switch to realize the control of power on and off. The operation of this device is simple, and the installation and later maintenance are very convenient, effectively improving the convenience of using the power knife switch. At the same time, the wiring end can be reinforced, so as to improve the protection effect and ensure the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a safety protection type power knife switch provided by an embodiment of the present invention;

[0018] Figure 2 is a schematic structural diagram of a safety protection type power knife switch provided by an embodiment of the present invention after removing the protective cover;

[0019] Figure 3 is Figure 2 an enlarged view of part A in

[0020] Figure 4 is a schematic structural diagram of a connection module in a safety protection type power knife switch provided by an embodiment of the present invention;

[0021] Figure 5 is a schematic structural diagram of a guiding sleeve in a safety protection type power knife switch provided by an embodiment of the present invention;

[0022] Figure 6 is a schematic structural diagram of a protective cover in a safety protection type power knife switch provided by an embodiment of the present invention;

[0023] Figure 7 is Figure 6 an enlarged view of part B in

[0024] Figure 8 For Figure 2 the enlarged view at position C in

[0025] In the attached drawings: base 1; protective cover 11; inlet bushing 111; power cord terminal 12; knife switch 13; first indicating line 14; second indicating line 15; connection module 2; mounting bracket 21; mounting turntable 22; winding rod 23; wiring board 24; placing groove 241; driving unit 3; guiding sleeve 31; spiral guiding groove 311; adjusting turntable 32; guiding column 321; connecting column 33; first spring 34; pressing unit 4; sliding rod 41; pressing block 42; pressing groove 421; second spring 43; adjusting unit 5; connecting plate 51; pressing rod 52; pressing sleeve 53; control component 6; guiding rod 61; adjusting screw 62. Specific implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] The following describes in detail the specific implementation of the present invention with reference to specific embodiments.

[0028] As Figures 1-5 shown, a safety protection type power knife switch provided by an embodiment of the present invention includes a base 1, a protective cover 11 detachably mounted on the base 1, a power cord terminal 12 and a knife switch 13 are further mounted on the base 1, and a plurality of power cord terminals 12 are provided, and the number of arms of the knife switch 13 is the same as the number of power cord terminals 12; further included are:

[0029] A connection module 2, the connection module 2 includes a plurality of wiring boards 24 mounted on the base 1, and the number of the wiring boards 24 is also the same as the number of power cord terminals 12, each wiring board 24 is correspondingly connected to an arm of the knife switch 13, a mounting bracket 21 is provided at the wiring board 24, and a pressing unit 4 for fixing the wire by pressing is provided on one side of the mounting bracket 21 close to the inlet end, a mounting turntable 22 is rotatably mounted in the mounting bracket 21, and two winding rods 23 are symmetrically arranged at the bottom of the mounting turntable 22;

[0030] The driving unit 3, the driving unit 3 includes a guiding sleeve 31 mounted on the mounting frame 21, a connecting column 33 is arranged in the guiding sleeve 31, and the connecting column 33 is mounted on the top of the mounting turntable 22. An adjusting turntable 32 is slidably mounted on the connecting column 33 in the vertical direction, and the adjusting turntable 32 is connected to the connecting column 33 through a sliding key. A first spring 34 is further arranged between the adjusting turntable 32 and the mounting frame 21. Two guiding columns 321 are symmetrically arranged on the side wall of the adjusting turntable 32, and a spiral guiding groove 311 matching the guiding column 321 is formed on the inner wall of the guiding sleeve 31;

[0031] The adjusting unit 5, the adjusting unit 5 is mounted on the inner side of the protective cover 11, and a set of adjusting units 5 are arranged at the corresponding positions of each wiring board 24. When the protective cover 11 is mounted on the base 1, the adjusting unit 5 will push the guiding sleeve 31 towards the side close to the mounting turntable 22, and simultaneously push the pressing unit 4 to press the electric wire tightly on the wiring board 24.

[0032] In the embodiment of the present invention, the number of the power supply terminals 12 and the wiring boards 24 can be flexibly set according to different types, specifically two or three. During use, each power supply terminal 12 is respectively used to connect to the power supply end. Then, after the end of the electric wire to be connected is peeled, it is placed between two winding rods 23 at the designated wiring board 24. Then, only need to mount the protective cover 11 on the base 1. During the process of mounting the protective cover 11 on the base 1, the adjusting unit 5 will push the adjusting turntable 32 to slide along the axial direction of the connecting column 33 towards the side close to the mounting turntable 22. During this process, the guiding column 321 will slide along the spiral guiding groove 311, so that the adjusting turntable 32 rotates. The adjusting turntable 32 can drive the mounting turntable 22 to rotate synchronously through the connecting column 33, and the mounting turntable 22 drives the winding rods 23 to rotate synchronously, so as to wind the end of the electric wire around the two winding rods 23. At the same time, the adjusting unit 5 will push the pressing unit 4 to move towards the side close to the wiring board 24, so as to clamp the electric wire tightly on the wiring board 24, that is, the power connection operation is completed. Subsequently, only need to toggle the knife switch 13 to realize the control of power on and power off.

[0033] As Figure 2 and 3 shown, as a preferred embodiment of the present invention, the pressing unit 4 includes a sliding rod 41 and a pressing block 42. The sliding rod 41 is mounted on the base 1, and the two sliding rods 41 are symmetrically distributed on both sides of the wiring board 24. The two ends of the pressing block 42 are respectively slidably mounted on a sliding rod 41, and a second spring 43 is further arranged between the pressing block 42 and the base 1. A pressing groove 421 is formed on the bottom surface of the pressing block 42.

[0034] In the embodiment of the present invention, when there is no external force acting, the elastic force of the second spring 43 will cause the pressing block 42 to be located at the upper limit position. After the protective cover 11 is installed on the base 1, the adjusting unit 5 will push the pressing block 42 to slide towards the side close to the wiring board 24, so as to clamp the wire on the wiring board 24 through the pressing groove 421 on the pressing block 42. When the wire is pulled from the outside, the acting point will be at the pressing block 42, thus preventing the external acting force from directly acting on the connection between the wire and the winding rod 23. When the wire needs to be removed, only by releasing the pressing action of the adjusting unit 5 on the pressing block 42, the elastic restoring force of the second spring 43 will push the pressing block 42 to move away from the wiring board 24, and the pressing action on the wire can be automatically released.

[0035] As Figure 2 and Figure 3 shown, as a preferred embodiment of the present invention, the adjusting unit 5 includes a connecting plate 51 installed inside the protective cover 11, and a pressing rod 52 and a pressing sleeve 53 are installed on the connecting plate 51.

[0036] In the embodiment of the present invention, when the protective cover 11 is installed on the base 1, the pressing sleeve 53 will abut against the adjusting turntable 32, and the pressing rod 52 will abut against the pressing block 42. As the protective cover 11 is installed in place, the connecting plate 51 will drive the pressing rod 52 and the pressing sleeve 53 to move towards the side close to the wiring board 24. During this process, the pressing sleeve 53 will push the adjusting turntable 32 to move towards the side close to the installation turntable 22, so as to drive the installation turntable 22 to rotate; the pressing rod 52 will push the pressing block 42 to move towards the side close to the wiring board 24, so as to clamp the wire on the wiring board 24.

[0037] As Figure 2 , Figure 3 , Figure 6 and Figure 7 shown, as a preferred embodiment of the present invention, each connecting plate 51 is installed inside the protective cover 11 through a set of control components 6, and the control components 6 drive the connecting plate 51 to linearly move along the axial direction of the connecting column 33.

[0038] In the embodiment of the present invention, after the protective cover 11 is installed on the base 1, if it is necessary to remove and replace a specified wire, there is no need to remove the protective cover 11 from the base 1. Only by driving the connecting plate 51 at the position of this wire to move away from the mounting bracket 21 through the control components 6, so that this set of adjusting units 5 releases the pressing action on the adjusting turntable 32 and the pressing block 42. Correspondingly, the pressing unit 4 releases the fixation of the wire, and the connection module 2 no longer winds the end of the wire. The operator only needs to gently pull to remove the wire. When installing later, only need to insert the wire in place and then adjust the control components 6.

[0039] As shown in Figure 2 , Figure 3 , Figure 6 and Figure 7 shown, as a preferred embodiment of the present invention, the control assembly 6 includes a guide rod 61 and an adjusting screw 62. The guide rod 61 is installed inside the protective cover 11, and the connecting plate 51 is slidably installed on the guide rod 61. The adjusting screw 62 penetrates through the protective cover 11, and a threaded hole matching the adjusting screw 62 is provided on the protective cover 11. One end of the adjusting screw 62 located inside the protective cover 11 is rotatably installed on the connecting plate 51.

[0040] In the embodiment of the present invention, in the initial state, the adjusting screw 62 is fully tightened on the protective cover 11. When it is necessary to disconnect and replace a specified wire, only the adjusting screw 62 needs to be rotated counterclockwise. Under the guiding action of the guide rod 61, the adjusting screw 62 can drive the connecting plate 51 to move away from the adjusting turntable 32, so that this set of adjusting units 5 releases the pressing action on the adjusting turntable 32 and the pressing block 42. Through the elastic restoring force of the first spring 34 and the second spring 43, the adjusting turntable 32 and the pressing block 42 can be restored to their initial positions.

[0041] As shown in Figure 4 shown, as a preferred embodiment of the present invention, a placement groove 241 is further provided on the upper surface of each wiring board 24. The placement groove 241 can provide guidance for the wire when inserting the wire, and in addition, it can cooperate with the pressing groove 421 to stably clamp the wire to prevent the wiring end of the wire from shaking randomly.

[0042] As shown in Figure 1 shown, as a preferred embodiment of the present invention, a plurality of inlet sleeves 111 are provided at one end of the protective cover 11 close to the wiring board 24, corresponding to each wiring board 24 respectively. Through the inlet sleeves 111, the wire can only enter (or leave) the protective cover 11 in one direction. Compared with only opening holes on the protective cover 11, the inlet sleeves 111 can effectively prevent the wire from shaking randomly during the wiring process, thereby improving the wiring efficiency.

[0043] It should be additionally noted that at this time, during the initial wiring, the wire needs to be inserted from a specified position at the end of the protective cover 11 and then placed between the two winding rods 23 at the corresponding wiring board 24.

[0044] As shown in Figure 2 and Figure 8 shown, as a preferred embodiment of the present invention, a first indicating line 14 and a second indicating line 15 are further provided at the edge of the side wall of the base 1. During use, the distance between the second indicating line 15 and the first indicating line 14 (i.e., Figure 8The length x1 in it) is the length that the end of the wire needs to be peeled, and the distance from the second indicating wire 15 to the nearest corner (i.e., Figure 8 x1 + x2 in it) is the length that the end of the wire needs to be inserted into the inside of the protective cover 11, where the x2 section is reserved for the area to match the pressing unit 4. By providing the indicating wire, it is convenient for the operator to reasonably peel and install the wire during wiring, improving the operation convenience.

[0045] Working principle: When in use, each power cord terminal 12 is respectively used to connect to the power supply end. Then, after peeling the end of the wire to be connected, it is placed between the two winding rods 23 at the designated wiring board 24. Then, just install the protective cover 11 on the base 1. During the process of installing the protective cover 11 on the base 1, the pressing sleeve 53 will abut against the adjusting turntable 32, and the pressing rod 52 will abut against the pressing block 42. As the protective cover 11 is installed in place, the connecting plate 51 will drive the pressing rod 52 and the pressing sleeve 53 to move towards the side close to the wiring board 24. By pushing the adjusting turntable 32 towards the side close to the mounting turntable 22 through the pressing sleeve 53, during this process, the guiding column 321 will slide along the spiral guiding groove 311, so that the adjusting turntable 32 rotates. The adjusting turntable 32 can drive the mounting turntable 22 to rotate synchronously through the connecting column 33, and the mounting turntable 22 drives the winding rods 23 to rotate synchronously, so as to wind the end of the wire around the two winding rods 23. At the same time, the pressing rod 52 will push the pressing block 42 towards the side close to the wiring board 24, so as to clamp the wire on the wiring board 24 through the pressing groove 421 on the pressing block 42, that is, the power connection operation is completed. When pulling the wire from the outside, the acting point will be at the pressing block 42, so as to prevent the external acting force from directly acting on the connection between the wire and the winding rod 23. Subsequently, just toggle the knife switch 13 to realize the control of power on and off.

[0046] In addition, after the protective cover 11 is installed on the base 1, if it is necessary to disassemble and replace the designated wire, there is no need to remove the protective cover 11 from the base 1 again. Just reverse the rotation of the adjusting screw 62. Under the guiding action of the guiding rod 61, the adjusting screw 62 can drive the connecting plate 51 to move towards the side away from the adjusting turntable 32, so that this set of adjusting units 5 releases the pressing action on the adjusting turntable 32 and the pressing block 42. Correspondingly, the pressing unit 4 will release the fixation of the wire, and the connecting module 2 will no longer wind the end of the wire. The operator only needs to gently pull to remove the wire. When installing later, only need to insert the wire in place and then adjust the control component 6.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A safety protection type electric knife switch, comprising a base, a protective cover is detachably mounted on the base, a power supply line terminal and a knife switch are further mounted on the base, and a plurality of the power supply line terminals are provided, and the number of the support arms of the knife switch is the same as the number of the power supply line terminals, and is characterized in that, Further included are: a connection module, the connection module includes a plurality of wiring boards mounted on the base, and the number of the wiring boards is the same as the number of power supply line terminals. Each of the wiring boards is correspondingly connected to an arm of the knife switch. An installation frame is provided at the wiring board. A pressing unit for fixing the wire by pressing is provided on one side of the installation frame close to the incoming line end. An installation turntable is rotatably installed in the installation frame, and two winding rods are symmetrically arranged at the bottom of the installation turntable; a driving unit, the driving unit includes a guiding sleeve mounted on the installation frame. A connecting column is arranged in the guiding sleeve, and the connecting column is mounted on the top of the installation turntable. An adjusting turntable is slidably mounted on the connecting column in the vertical direction, and the adjusting turntable is connected to the connecting column through a sliding key. A first spring is further arranged between the adjusting turntable and the installation frame. Two guiding columns are symmetrically arranged on the side wall of the adjusting turntable, and spiral guiding grooves matching the guiding columns are formed on the inner wall of the guiding sleeve; an adjusting unit, the adjusting unit is installed inside the protective cover, and a set of adjusting units are arranged at the corresponding positions of each wiring board. After the protective cover is installed on the base, the adjusting unit will push the guiding sleeve towards the side close to the installation turntable, and simultaneously push the pressing unit to press the wire tightly on the wiring board; the pressing unit includes a sliding rod and a pressing block. The sliding rod is mounted on the base, and the two sliding rods are symmetrically distributed on both sides of the wiring board. Two ends of the pressing block are respectively slidably mounted on a sliding rod, and a second spring is further arranged between the pressing block and the base. A pressing groove is formed on the bottom surface of the pressing block; the adjusting unit includes a connecting plate installed inside the protective cover, and a pressing rod and a pressing sleeve are mounted on the connecting plate; each of the connecting plates is installed inside the protective cover through a set of control components, and the control components drive the connecting plate to perform linear movement along the axial direction of the connecting column.

2. The safety protection type electric knife switch according to claim 1, characterized in that, The control components include a guiding rod and an adjusting screw. The guiding rod is installed inside the protective cover, and the connecting plate is slidably mounted on the guiding rod. The adjusting screw penetrates through the protective cover, and a threaded hole matching the adjusting screw is provided on the protective cover. One end of the adjusting screw located inside the protective cover is rotatably mounted on the connecting plate.

3. The safety protection type electric knife switch according to claim 1, characterized in that, A placement groove is further formed on the upper surface of each wiring board.

4. The safety protection type power knife switch according to claim 1, characterized in that, A plurality of incoming line sleeves are arranged at one end of the protective cover close to the wiring board, corresponding to each wiring board respectively.

5. The safety protection type electric knife switch according to claim 1, characterized in that, A first indication line and a second indication line are further arranged at the edge of the side wall of the base, and the distance between the first indication line and the second indication line is used to indicate the stripping length of the wire wiring end.

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