High-voltage cabinet electric grounding switch control structure

Abstract

The utility model discloses an electric grounding switch control structure of a high-voltage cabinet. The electric grounding switch control structure comprises a connecting frame and an auxiliary conductive device. According to the utility model, the auxiliary conductive device is arranged, that is, the conductive contact can be in auxiliary contact with the conductive sheet arranged in the connecting frame, so that auxiliary power-on switching-on is realized, the stability of a switching-on state is improved, poor contact information is reduced, and the pressure spring arranged in the contact assembly can provide an elastic pressing effect, so that the conductive contact is in stable contact with the conductive sheet; a locking assembly is arranged, that is, through threaded transmission of an adjusting rod and a sliding block, connecting arms arranged on the two sides can drive a movable frame, the movable frame indirectly drives a lock shaft, locking of the lock shaft and a fixed shaft is rapidly relieved, and a connecting frame and a conducting strip can be rapidly disassembled and assembled; therefore, the conductive sheet is convenient to assemble, disassemble and cooperate.

Description

Technical Field

[0001] The utility model relates to the field of grounding knives, in particular to a control structure of an electric grounding knife of a high-voltage cabinet. Background Art

[0002] High-voltage switchgear refers to the switchgear used for power generation, transmission, distribution, power circulation and consumption in power systems, and plays the role of switching, control or protection.

[0003] Due to the high voltage of high-voltage switchgear, in order to ensure the personal safety of operating and maintenance personnel, high-voltage switchgear needs to be equipped with a safe and reliable electric grounding knife structure to meet the "five-protection" locking requirements. The interlocking requirements between the lower door of the cabinet and the grounding switch are as follows: When the high-voltage switchgear is in operation, the grounding switch is in the open state, and the lower door of the cabinet with live compartments is prohibited from being opened to ensure safe operation; when the equipment needs to be repaired, the grounding switch in the cabinet must be in the closed state after the switch is powered off, that is, the cabinet has been safely grounded, and the lower door of the cabinet can be opened;

[0004] The function of the grounding switch is: when the equipment needs to be shut down for maintenance, after the switch is disconnected and the power is tested to confirm that there is no electricity, the grounding switch is closed and maintenance can be carried out with confidence. During maintenance, if high voltage electricity is mistakenly sent into the high-voltage cabinet, since the resistance between the grounding switch and the high voltage electricity is much smaller than the resistance of the human body, the large current will flow directly into the ground from the grounding switch, which can prevent the large current from causing danger to the maintenance personnel. In general, the grounding switch can discharge the line and prevent the mistaken power from being sent to the maintenance line, which will bring danger to the maintenance personnel;

[0005] The grounding knife switch currently used needs to make the moving contact and the static contact contact or separate during use to realize the power-on or power-off activities. During multiple power-on or power-off processes, friction will be generated, causing a certain degree of wear on the contact part of the moving contact and the static contact, thereby causing adverse effects on the closing and power-on contact of the grounding knife switch. Utility Model Content

[0006] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a high-voltage cabinet electric grounding knife control structure.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-voltage cabinet electric grounding knife control structure, including a connecting frame, a rotating shaft is inserted inside the connecting frame, a shift block is installed on the right side of the rotating shaft, a connecting plate is installed on the outside of the shift block, the front side of the connecting plate is connected to the spring, and the front side of the spring is combined with a limit rod, the outside of the limit rod is limitedly connected to the connecting frame, a moving contact is installed on the upper end of the connecting plate, and the top of the moving contact is connected to the static contact, a fastening bolt is screwed into the rear side of the static contact, and the static contact is fastened by the rear side. The bolt is connected to the upper end of the insulator sensor, and the insulator sensor is installed at the upper end of the rear side of the connecting frame. A connecting rod is inserted into the moving contact, and an indicator plate is arranged on the outside of the connecting rod. It also includes an auxiliary conductive device arranged on the outside of the moving contact and the static contact. The auxiliary conductive device includes a connecting frame arranged at the lower end of the static contact, conductive sheets arranged on both sides of the connecting frame, a contact assembly installed inside the upper end of the moving contact, a locking assembly arranged inside the static contact, and a fixed shaft arranged on both sides of the upper end of the connecting frame, and the fixed shaft is plugged and locked with the inside of the locking assembly.

[0008] Preferably, the contact assembly includes a mounting shell built into the upper end of the moving contact, a plug-in shaft plugged into the mounting shell, a compression spring installed on the outside of the plug-in shaft, a conductive ring sleeved on the outside of the plug-in shaft, a conductive contact connected to the left side of the conductive ring, and a swivel fastened to the left side of the mounting shell.

[0009] Preferably, the locking assembly includes an adjusting rod rotatably connected to the inside of the front side of the static contact, an insulating knob connected to the upper end of the adjusting rod, a slider threadedly connected to the outside of the adjusting rod, a connecting arm rotatably connected to the left and right sides of the slider, a movable frame connected to the side of the connecting arm, a compression spring installed inside the movable frame, and a locking shaft plugged into the inside of the movable frame and connected to the compression spring, wherein the locking shaft is plugged into the inside of the upper end of the fixed shaft.

[0010] Preferably, the contact assembly is symmetrically arranged along the left and right sides of the upper end of the moving contact, and the mounting shell arranged inside the contact assembly is threadedly connected to the left and right sides of the upper end of the moving contact.

[0011] Preferably, the conductive ring and the conductive contact are installed in an integrated combination, and the outer side of the conductive ring is tightly against the inner wall of the installation shell.

[0012] Preferably, the upper and lower outer parts of the adjusting rod are both provided with external threads, and the upper and lower external threads of the adjusting rod are in opposite states.

[0013] Preferably, the sliding block and the connecting arm are symmetrically arranged up and down along the adjusting rod, and a pair of connecting arms on the left and right sides are both rotatably connected to the moving frame.

[0014] Preferably, the outer end of the lock shaft is overall in a smooth inverted trapezoidal shape, and the outer end of the lock shaft is correspondingly embedded in the upper end of the fixed shaft.

[0015] Beneficial effects of the utility model:

[0016] Advantage 1: The utility model provides an auxiliary conductive device, that is, the conductive contact can make auxiliary contact with the conductive sheet arranged inside the connection frame to achieve auxiliary power-on and closing, so as to improve the stability of the closing state and reduce poor contact information. The compression spring arranged inside the contact assembly can provide an elastic compression effect, so that the conductive contact and the conductive sheet are in stable contact, thereby ensuring the stability of the auxiliary contact power-on state.

[0017] Advantage 2: The utility model is provided with a locking assembly, that is, through the threaded transmission of the adjusting rod and the slider, the connecting arms arranged on both sides can drive the moving frame, so that the moving frame indirectly drives the locking shaft to quickly release the lock of the locking shaft and the fixed shaft, so that the connecting frame and the conductive sheet can be quickly disassembled and assembled, thereby achieving the advantage of convenient disassembly and assembly of the conductive sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the combined structure of the moving contact, the stationary contact and the auxiliary conductive device of the utility model;

[0020] Figure 3 This is a schematic diagram of the front view structure of the auxiliary conductive device of the utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the auxiliary conductive device of the utility model;

[0022] Figure 5 It is an enlarged structural diagram of the contact assembly A of the utility model;

[0023] Figure 6 It is a front view structural diagram of the locking assembly of the utility model.

[0024] Among them: connecting frame-1, rotating shaft-2, shift block-3, connecting plate-4, spring-5, limiting rod-6, moving contact-7, static contact-8, fastening bolt-9, insulator sensor-10, connecting rod-11, indicator plate-12, auxiliary conductive device-13, connecting frame-131, conductive sheet-132, contact assembly-133, mounting shell-1331, plug-in shaft-1332, compression spring-1333, conductive ring-1334, conductive contact-1335, rotating ring-1336, locking assembly-134, adjusting rod-1341, insulating knob-1342, slider-1343, connecting arm-1344, movable frame-1345, compression spring-1346, locking shaft-1347, fixed shaft-135. DETAILED DESCRIPTION

[0025] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0026] See also Figure 1-2 The utility model provides a high-voltage cabinet electric grounding knife control structure, including a connecting frame 1, a rotating shaft 2 is inserted in the connecting frame 1, a shift block 3 is installed on the right side of the rotating shaft 2, a connecting plate 4 is installed on the outside of the shift block 3, the front side of the connecting plate 4 is connected with a spring 5, and the front side of the spring 5 is combined with a limit rod 6, the outside of the limit rod 6 is limitedly connected with the connecting frame 1, a moving contact 7 is installed on the upper end of the connecting plate 4, and the top of the moving contact 7 is connected with a static contact 8, a fastening bolt 9 is screwed into the rear side of the static contact 8, and the static contact 8 is connected to the upper end of an insulator sensor 10 through the fastening bolt 9 screwed on the rear side, and the insulator sensor 10 is installed on the upper end of the rear side of the connecting frame 1, a connecting rod 11 is inserted in the moving contact 7, an indicator plate 12 is arranged on the outside of the connecting rod 11, and an auxiliary conductive device 13 is also included, which is arranged on the outside of the moving contact 7 and the static contact 8.

[0027] See also Figure 3-4 The auxiliary conductive device 13 in this embodiment includes a connecting frame 131 correspondingly installed at the lower end of the front side of the static contact 8, and the connecting frame 131 is arranged in an inverted concave block shape as a whole, and the conductive sheets 132 are symmetrically and tightly connected to the left and right sides of the connecting frame 131, and the conductive sheets 132 are electrically connected and combined with the static contact 8, and the contact components 133 are symmetrically installed on the inside of the two sides of the upper end of the moving contact 7 to realize auxiliary contact energization, and the locking components 134 are correspondingly installed on the inside of the front side of the static contact 8 to realize the quick installation and matching of the connecting frame 131, and the fixed shafts 135 are symmetrically and vertically installed on the left and right sides of the upper end of the connecting frame 131, and the fixed shafts 135 on both sides are inserted into the front side of the static contact 8, and the upper side edges of the fixed shafts 135 on both sides are provided with notches, and secondly, the fixed shaft 135 is plugged and locked with the inside of the locking component 134 through the notches opened at the upper end.

[0028] See also Figure 5 The contact assembly 133 in this embodiment includes a mounting shell 1331 built into the upper end of the moving contact 7, and the outer side of the mounting shell 1331 is correspondingly provided with an external thread, thereby realizing convenient disassembly and assembly, a corresponding plug-in shaft 1332 that is laterally plugged into the mounting shell 1331 to realize support cooperation, a corresponding compression spring 1333 that is correspondingly installed on the outer side of the plug-in shaft 1332 to realize elastic compression cooperation, thereby improving the auxiliary contact power-on activity, a corresponding conductive ring 1334 that is correspondingly sleeved on the outer side of the plug-in shaft 1332 to realize auxiliary power-on cooperation, a conductive contact 1335 connected to the left side of the conductive ring 1334, and the outer end of the conductive contact 1335 moves out of the mounting shell 1331 and contacts the outer side of the conductive sheet 132, and a corresponding rotating ring 1336 that is tightly connected to the outer side of the mounting shell 1331, so that the mounting shell 1331 can be conveniently rotated and disassembled as a whole through the rotating ring 1336.

[0029] Among them, the contact assembly 133 is symmetrically arranged along the left and right sides of the upper end of the moving contact 7, and the mounting shell 1331 arranged inside the contact assembly 133 is threadedly connected to the left and right sides of the upper end of the moving contact 7, ensuring that the mounting shell 1331 and the moving contact 7 can be quickly combined, docked or disassembled; the conductive ring 1334 and the conductive contact 1335 are installed in an integrated combination, and the outer side of the conductive ring 1334 is tightly against the inner wall of the mounting shell 1331, ensuring that the conductive ring 1334 and the conductive contact 1335 cooperate with each other to achieve auxiliary contact power supply.

[0030] See also Figure 6 The locking assembly 134 in this embodiment includes an adjusting rod 1341 that is vertically rotatably connected to the front side of the static contact 8 to realize quick adjustment of the unlocking transmission, an insulating knob 1342 correspondingly installed on the upper end of the adjusting rod 1341 to reduce the electric shock phenomenon, a slider 1343 symmetrically threadedly connected to the upper and lower ends of the adjusting rod 1341, a connecting arm 1344 symmetrically rotatably connected to the left and right sides of the slider 1343, and a movable frame 1345 correspondingly installed on the side of the connecting arms 1344 on both sides away from the slider 1343, and the movable frame 1345 is built into the front side of the static contact 8, and the movable frame 1345 is arranged in an inverted L-shaped block as a whole, a compression spring 1346 built into the side of the movable frame 1345 to realize elastic compression fit, a lock shaft 1347 that is laterally inserted into the side of the movable frame 1345 and connected to the compression spring 1346, and the lock shaft 1347 is inserted into the upper end of the fixed shaft 135.

[0031] Specifically, external threads are provided on the upper and lower outer parts of the adjusting rod 1341, and the external threads on the upper and lower parts of the adjusting rod 1341 are in opposite states; the slider 1343 and the connecting arm 1344 are symmetrically arranged along the upper and lower parts of the adjusting rod 1341, and the left and right pairs of connecting arms 1344 are rotatably connected to the movable frame 1345, and under the transmission of the left and right pairs of connecting arms 1344, the movable frames 1345 on both sides can achieve relative synchronous or opposite movement; the outer end of the locking shaft 1347 is arranged in a smooth inverted trapezoidal shape as a whole, and the outer end of the locking shaft 1347 is correspondingly embedded in the upper end of the fixed shaft 135, ensuring that the locking shaft 1347 is plugged and locked with the corresponding notch on the upper end of the fixed shaft 135, so as to ensure that the overall installation of the connecting frame 131 is firm.

[0032] Here’s how it works:

[0033] When the electric grounding switch for the high-voltage cabinet is to be controlled, the shift block 3 provided on the right side of the rotating shaft 2 can be connected to the external driving device first, so that the rotating shaft 2 can realize the rotation transmission activity under the drive of the driving device, that is, when the rotating shaft 2 rotates counterclockwise, the synchronous counterclockwise rotation of the connecting plate 4 installed outside will be realized, and the movement of the moving contact 7 connected to the outer side of the upper end will be realized through the rotation of the connecting plate 4, so that the moving contact 7 moves to release the contact with the static contact 8 in the closed state. At the same time, the spring 5 connected to the front side of the connecting plate 4 can improve the elastic pull-back effect to ensure that the moving contact 7 can be opened and the static contact 8 can be closed. In a stable state, the electric grounding knife of the high-voltage cabinet can be quickly disconnected. If a closing activity is required, the driving motor can be used again to drive the shift block 3 clockwise, so that the rotating shaft 2 can rotate clockwise to rotate the synchronous belt connecting plate 4. As a result, the moving contact 7 is driven and will contact the lower end of the front side of the static contact 8 again to realize the power-on grounding closing activity. At the same time, when rotating clockwise, the spring 5 installed on the front side of the connecting plate 4 will be stretched to provide elastic pull-back cooperation for the subsequent opening. In this way, after completing the closing activity, the safety inspection inside the high-voltage cabinet can be carried out;

[0034] In order to further improve the closing effect and avoid the long-term contact wear between the moving contact 7 and the static contact 8, which leads to poor power-on closing effect, an auxiliary conductive device 13 is provided on the outside of the moving contact 7 and the static contact 8 to realize the auxiliary contact power-on activity, that is, when the moving contact 7 and the static contact 8 are closed, the contact assemblies 133 installed on the left and right sides of the upper end of the moving contact 7 will move accordingly and move into the connection frame 131 to realize the conductive contact 1335 and the left and right sides of the connection frame 131. The conductive sheet 132 is provided to abut against each other, thereby realizing auxiliary contact energization activity, and cooperates with the conductive ring 1334 integrally connected to the inner side of the conductive contact 1335 to improve the contact energization activity. Secondly, when the conductive contact 1335 and the conductive sheet 132 are in abutment with each other, the elastic force of the compression spring 1333 provided on the outside of the plug shaft 1332 can be cooperated to improve the contact force between the conductive contact 1335 and the conductive sheet 132, so as to realize the stability of the auxiliary contact energization effect and reduce the occurrence of the energization contact closing defect;

[0035] If it is necessary to disassemble and replace the connecting frame 131 and the conductive sheet 132 later, the insulating knob 1342 provided inside the locking assembly 134 can be rotated to make the insulating knob 1342 realize the rotation of the adjusting rod 1341 at the bottom. When the adjusting rod 1341 is rotated, the slider 1343 threadedly connected to the external threads provided at the upper and lower ends of the adjusting rod 1341 will realize the opposite movement up and down. Therefore, when the sliders 1343 on both sides move down, the connecting arms 1344 connected to the left and right sides of the slider 1343 are rotated accordingly, and the pulling of the movable frame 1345 connected to the outer ends is realized through mobile transmission, so that the movable frames 1345 on both sides can realize lateral relative movement along the front side of the static contact 8. In this way, the lock shaft 1347, which is correspondingly plugged into the outer ends of the static contacts 8 on both sides and plugged into the recesses provided in the upper end of the fixed shaft 135 and locked, can be conveniently externally locked. The movable movement can realize quick unlocking, so that the connection frame 131 and the conductive sheet 132 can be easily disassembled. When reinstalling later, the reset transmission of the movable frame 1345 must be completed in advance to reset the locking shafts 1347 on both sides to the locked plug-in position. In this way, when the fixed shafts 135 on both sides are inserted into the front side of the static contact 8, the locking shafts 1347 on both sides will be squeezed correspondingly, so that the locking shafts 1347 on both sides are moved into the movable frame 1345 at the same time to squeeze the compression springs 1346 provided inside the sides of the movable frame 1345 on both sides. Then, after the fixed shafts 135 on both sides are fully inserted, the compressed compression springs 1346 will rebound to push the locking shaft 1347 outward, so that the outer end of the locking shaft 1347 is correspondingly inserted into the internal recess at the upper end of the fixed shaft 135, so as to realize quick plug-in locking, so as to quickly and conveniently complete the reinstallation and use of the connection frame 131 and the conductive sheet 132;

[0036] If the contact assembly 133 needs to be disassembled as a whole, the rotating ring 1336 provided on the outside of the mounting shell 1331 can be rotated to realize the overall rotation of the mounting shell 1331. In this way, the mounting shell 1331 can cooperate with the external thread provided on the outside to screw out the upper end of the moving contact 7, thereby realizing convenient disassembly.

[0037] The utility model provides a high-voltage cabinet electric grounding knife control structure, which is provided with an auxiliary conductive device 13, that is, a conductive contact 1335 can be in auxiliary contact with a conductive sheet 132 provided inside a connection frame 131 to realize auxiliary power-on closing, thereby improving the stability of the closing state and reducing poor contact information, and a compression spring 1333 provided inside a contact assembly 133 can provide an elastic compression effect, so that the conductive contact 1335 is in stable contact with the conductive sheet 132, thereby ensuring the stability of the auxiliary contact power-on state, and a locking assembly 134 is provided, that is, through the threaded transmission of an adjusting rod 1341 and a slider 1343, the connecting arms 1344 provided on both sides can drive a moving frame 1345, so that the moving frame 1345 indirectly drives a locking shaft 1347, so as to quickly release the locking of the locking shaft 1347 and the fixed shaft 135, so that the connection frame 131 and the conductive sheet 132 can be quickly disassembled and assembled, thereby achieving the advantage of convenient disassembly and assembly of the conductive sheet 132.

[0038] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-voltage cabinet electric grounding knife control structure, comprising a connecting frame (1), a rotating shaft (2) is inserted into the connecting frame (1), a shift block (3) is installed on the right side of the rotating shaft (2), a connecting plate (4) is installed on the outside of the shift block (3), the front side of the connecting plate (4) is connected to a spring (5), and the front side of the spring (5) is combined with a limit rod (6), the outer side of the limit rod (6) is connected to the connecting frame (1) in a limiting manner, and the upper end of the connecting plate (4) is installed A moving contact (7) is provided, and the top of the moving contact (7) is connected to the stationary contact (8), a fastening bolt (9) is screwed into the rear side of the stationary contact (8), and the stationary contact (8) is connected to the upper end of the insulator sensor (10) through the fastening bolt (9) screwed on the rear side, and the insulator sensor (10) is installed on the upper end of the rear side of the connecting frame (1), a connecting rod (11) is inserted into the inside of the moving contact (7), and an indicator plate (12) is provided on the outside of the connecting rod (11); Features: The invention also comprises an auxiliary conductive device (13) arranged outside the moving contact (7) and the stationary contact (8), wherein the auxiliary conductive device (13) comprises a connection frame (131) arranged at the lower end of the stationary contact (8), conductive sheets (132) arranged at both sides of the connection frame (131), a contact assembly (133) installed inside the upper end of the moving contact (7), a locking assembly (134) arranged inside the stationary contact (8), and a fixed shaft (135) arranged at both sides of the upper end of the connection frame (131), wherein the fixed shaft (135) is plugged and locked with the inside of the locking assembly (134).

2. According to the high-voltage cabinet electric grounding knife control structure of claim 1, it is characterized by: The contact assembly (133) comprises a mounting shell (1331) built into the upper end of the moving contact (7), a plug-in shaft (1332) plugged into the mounting shell (1331), a compression spring (1333) mounted on the outside of the plug-in shaft (1332), a conductive ring (1334) sleeved on the outside of the plug-in shaft (1332), a conductive contact (1335) connected to the left side of the conductive ring (1334), and a swivel (1336) fastened to the left side of the mounting shell (1331).

3. According to the high-voltage cabinet electric grounding knife control structure of claim 1, it is characterized by: The locking assembly (134) comprises an adjusting rod (1341) rotatably connected to the interior of the front side of the stationary contact (8), an insulating knob (1342) connected to the upper end of the adjusting rod (1341), a slider (1343) threadedly connected to the outer side of the adjusting rod (1341), a connecting arm (1344) rotatably connected to the left and right sides of the slider (1343), a movable frame (1345) connected to the side of the connecting arm (1344), a compression spring (1346) installed in the interior of the movable frame (1345), and a locking shaft (1347) plugged into the interior of the movable frame (1345) and connected to the compression spring (1346), wherein the locking shaft (1347) is plugged into the interior of the upper end of the fixed shaft (135).

4. According to claim 2, a high-voltage cabinet electric grounding knife control structure is characterized in that: The contact assembly (133) is symmetrically arranged along the upper end of the moving contact (7), and the mounting shell (1331) arranged inside the contact assembly (133) is threadedly connected to the left and right sides of the upper end of the moving contact (7).

5. According to claim 2, a high-voltage cabinet electric grounding knife control structure is characterized in that: The conductive ring (1334) and the conductive contact (1335) are installed in an integrated combination, and the outer side of the conductive ring (1334) is tightly against the inner wall of the installation shell (1331).

6. According to claim 3, a high-voltage cabinet electric grounding knife control structure is characterized in that: The upper and lower exteriors of the adjusting rod (1341) are both provided with external threads, and the upper and lower external threads of the adjusting rod (1341) are in opposite states.

7. According to claim 3, a high-voltage cabinet electric grounding knife control structure is characterized in that: The slider (1343) and the connecting arm (1344) are symmetrically arranged up and down along the adjusting rod (1341), and a pair of connecting arms (1344) on the left and right sides are both rotatably connected to the moving frame (1345).

8. According to claim 3, a high-voltage cabinet electric grounding knife control structure is characterized in that: The outer end of the locking shaft (1347) is generally in the shape of a smooth inverted trapezoid, and the outer end of the locking shaft (1347) is correspondingly embedded in the upper end of the fixed shaft (135).

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