Grounding switch

Abstract

The utility model discloses a grounding switch comprising a pedestal and three columns, and each column is provided with a support and a conductive reed; a main shaft is rotatably installed on the base, a first grounding switch support and a second grounding switch support are installed on the main shaft at intervals, grounding switches are installed on a vertical plate of the first grounding switch support and a vertical plate of the second grounding switch support at intervals, adjusting screws are arranged on the two grounding switches, and a clamping groove is defined by the two grounding switches. A sliding seat and a special-shaped ring slidably mounted on the sliding seat are mounted on the base, and an electromagnetic push rod is arranged on the base; when the main shaft is rotated to drive the clamping groove and the conductive reed to have a closing state or an opening state, the electromagnetic push rod pushes the special-shaped ring and the clamping lock shaft section to be clamped and limited; under the conductive connection state or the opening state, the electromagnetic push rod pulls the special-shaped ring to be matched with the clamping lock shaft section to achieve rotation stopping of the main shaft, the width of the clamping groove is adjusted through the adjusting screw, and the connection stability of the conductive connection state can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage grounding switches, in particular to a grounding switch. Background Art

[0002] As a key component in power equipment, high-voltage grounding switches play an indispensable role in ensuring the safe operation of power grids, implementing maintenance operations, and responding to sudden faults. High-voltage grounding switches can quickly ground the fault point when a fault occurs, effectively release electrical energy, prevent the fault from expanding, and protect personnel and equipment safety. During the daily maintenance and fault repair of power facilities, high-voltage equipment must be reliably grounded to ensure the personal safety of operators.

[0003] High-voltage grounding switches are generally integrated in power equipment. Under normal conditions, the grounding switch is in the open state, and during inspection and maintenance, the grounding switch is in the closed state. The grounding switch needs to have good limit when opening or closing to avoid misoperation and reduce the risk of safety accidents.

[0004] Therefore, it is necessary to limit the position of the grounding switch when it is in the open or closed state to avoid the risk of misoperation. Utility Model Content

[0005] 1. Technical issues

[0006] The utility model aims to provide a grounding switch to solve the problem that the grounding switch in the prior art has no limit structure when in an open or closed state, thereby reducing the risk of misoperation.

[0007] (II) Technical solution

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A grounding switch, comprising a base and three columns installed on the base at intervals, each of the columns is provided with a bracket and a conductive spring fixed on the bracket; a main shaft is rotatably installed on the base, a first "L"-shaped grounding knife bracket and a second "U"-shaped grounding knife bracket are installed on the main shaft at intervals, grounding knives are installed on the vertical plates of the first grounding knife bracket and the vertical plates of the second grounding knife bracket at intervals, the two grounding knives are provided with adjustment screws for adjusting the width, and the two grounding knives are surrounded to form a locking groove; a sliding seat and a special-shaped ring slidably installed on the sliding seat are installed on the base, and an electromagnetic push rod for pushing the special-shaped ring to slide is provided on the base; a locking shaft section is provided on the main shaft, and when the main shaft is rotated to drive the locking groove and the conductive spring to have a closed state or an open state, the electromagnetic push rod pushes the special-shaped ring to engage with the locking shaft section to limit the position.

[0010] Preferably, a limit block for limiting the position of the corresponding grounding knife is provided on one of the columns.

[0011] Preferably, a limit plate is installed on the main shaft, and a height adjustment screw and a locking nut for tightening the height adjustment screw are provided on the base. When the engaging groove and the conductive spring sheet are in an open state, the limit plate is supported on the height adjustment screw.

[0012] Preferably, a rectangular hole is provided on the special-shaped ring, and the cross-section of the locking shaft segment is rectangular.

[0013] Preferably, the sliding seat comprises a supporting base plate installed on the base and two supporting seats installed on the supporting base plate at intervals, and parallel sliding rods are installed on the two supporting seats at intervals; the special-shaped ring is slidably installed on the sliding rod.

[0014] Preferably, the electromagnetic push rod includes an electromagnetic driving part and a pushing rod arranged on the electromagnetic driving part, and the pushing rod passes through the supporting seat on the corresponding side and is connected to the special-shaped ring; and a mounting plate for mounting the electromagnetic driving part is provided on the base.

[0015] Preferably, the support base plate is provided with strip holes for adjusting the installation position.

[0016] Preferably, the main shaft includes a mounting section connected to the locking shaft section and a driving connection section, the first grounding knife bracket and the second grounding knife bracket are fixed on the mounting section, and the limiting plate is installed on the mounting section; the driving connection section is connected to a rotating drive mechanism.

[0017] Preferably, the rotary drive mechanism comprises a handle connected to the drive connection section; or a rotary motor connected to the drive connection section.

[0018] Preferably, the drive connection section is provided with at least one mounting block and a micro switch integrated on the mounting block.

[0019] (III) Beneficial effects

[0020] A first grounding knife bracket and a second grounding knife bracket are arranged on the main shaft, and a grounding knife is installed to form a snap-fit ​​groove. The main shaft is rotated so that the snap-fit ​​groove is snap-fitted with the conductive spring to realize conductive grounding. When grounding is not required, the main shaft is rotated so that the snap-fit ​​groove is disengaged from the conductive spring to separate. In the conductive connection state or the open state, the electromagnetic push rod pulls the special-shaped ring and the locking shaft section to cooperate to realize the main shaft stopping, thereby avoiding the risk of changes in the closed state or the open state due to possible misoperation.

[0021] At the same time, by adjusting the width of the engaging groove by adjusting the screw, the connection stability of the conductive connection state can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0024] Figure 3 This is a schematic diagram of the structure of the main shaft in the embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of a special-shaped ring in an embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the sliding seat in the embodiment of the utility model;

[0027] exist Figures 1 to 5 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0028] Base 1, column 2, bracket 3, conductive spring 4, main shaft 5, locking shaft section 51, mounting section 52, drive connection section 53, first grounding knife bracket 6, second grounding knife bracket 7, grounding knife 8, sliding seat 9, supporting base plate 91, supporting seat 92, sliding rod 93, bar hole 94, special-shaped ring 10, rectangular hole 101, electromagnetic push rod 11, electromagnetic drive part 111, push rod 112, engaging groove 12, mounting block 13, micro switch 14, limit plate 15, limit block 16, height adjustment screw 17, locking nut 18. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] See also Figure 1-Figure 5 As shown, in the embodiment of the utility model, a grounding switch is proposed. When it is used specifically, it is integrated in the power equipment, mainly to realize grounding conduction when the power system is inspected and maintained, and to meet the safety of the operator when performing electrical operations. Specifically, it includes a base 1 and three columns 2 installed on the base 1 at intervals, each of the columns 2 is provided with a bracket 3 and a conductive spring 4 fixed on the bracket 3, and the three conductive springs 4 are respectively connected to the three-phase cables, wherein the conductive spring 4 has a hollow structure and has a certain elastic force.

[0031] At the same time, a main shaft 5 is rotatably installed on the base 1, and a first "L"-shaped grounding knife bracket 6 and a second "U"-shaped grounding knife bracket 7 are installed on the main shaft 5 at intervals. Grounding knives 8 are installed on the vertical upright plates of the first grounding knife bracket 6 and the vertical upright plates of the second grounding knife bracket 7 at intervals. The two grounding knives 8 are provided with adjusting screws for adjusting the width. The two grounding knives 8 are surrounded by a locking groove 12. Specifically, a pair of grounding knives 8 are provided on the first grounding knife bracket 6, and two pairs of grounding knives 8 are provided on the second grounding knife bracket 7. The width of the locking groove 12 is adjusted by the adjusting screw, so as to ensure the connection stability between the grounding knife 8 and the conductive spring 4 in the closed state. When the main shaft 5 rotates with the first grounding knife bracket 6 and the second grounding knife bracket 7, the grounding knife 8 at the corresponding position can be conductively connected or separated from the conductive spring 4. When grounding is carried out, it is in a conductive closed state, and when not grounded, it is in an open state. The main shaft 5 can be driven to rotate manually or automatically. Specifically, when rotating, the main shaft 5 generally only needs to rotate 90 degrees, and reciprocates between the two positions of 0° and 90°, which can further avoid the situation of insufficient contact or separation.

[0032] At the same time, when conducting grounding or separation, it is necessary to avoid the spindle 5 from moving due to misoperation, which may bring risks. Therefore, it is necessary to achieve reliable limit on the rotation of the spindle 5 to avoid unexpected risks. A sliding seat 9 and a special-shaped ring 10 slidably mounted on the sliding seat 9 are installed on the base 1. The base 1 is provided with an electromagnetic push rod 11 for pushing the special-shaped ring 10 to slide; the special-shaped ring 10 is sleeved on the spindle 5 and realizes sliding guidance through the sliding seat 9. The electromagnetic push rod 11 is a mature existing structure, which uses the spiral tube leakage flux principle to achieve a reciprocating action response time of less than 0.05s. Generally speaking, when the spindle 5 rotates to 0° and 90° positions, corresponding angle detection can be performed. When there is no external input signal to drive the electromagnetic push rod 11, the electromagnetic push rod 11 keeps the special-shaped ring 10 pulled to the stop position to ensure that the spindle 5 is reliably stopped in the corresponding state.

[0033] The main shaft 5 is provided with a locking shaft section 51. When the main shaft 5 is rotated to drive the locking groove 12 and the conductive spring sheet 4 to have a closed state or an open state, the electromagnetic push rod 11 pushes the special-shaped ring 10 to engage and limit with the locking shaft section 51. Therefore, when the main shaft 5 is rotated to drive the grounding knife 8 and the conductive spring sheet 4 to have a closed state or an open state, the electromagnetic push rod 11 pushes the special-shaped ring 10 to engage and limit with the locking shaft section 51.

[0034] It should be noted that the drive of the electromagnetic push rod 11 is connected to the PLC control box of the power equipment. The main shaft 5 can only be unlocked when the control signal is manually input to push the special-shaped ring 10. Regardless of whether it is in the grounded conductive closing state or the non-grounded opening state, the special-shaped ring 10 is pulled to lock the locking shaft section 51 to achieve locking and stopping. This can avoid the risk of the main shaft 5 rotating due to misoperation and improve the safety protection of the operator.

[0035] The main shaft 5 may also be installed with insulating materials or insulating gaskets at the locations where the first grounding knife bracket 6 and the second grounding knife bracket 7 are installed, so that the grounding conductive current will not affect the electrical components installed on the base 1.

[0036] Specifically, a limit stopper 16 for limiting the corresponding grounding knife 8 is provided on one of the columns 2. The limit stopper 16 blocks the grounding knife 8 in the closed state, thereby achieving stopping when the main shaft 5 rotates to 90°.

[0037] At the same time, a limit plate 15 is installed on the main shaft 5, and a height adjustment screw 17 and a locking nut 18 for tightening the height adjustment screw 17 are provided on the base 1. When the engaging groove 12 and the conductive spring sheet 4 are in the open state, the limit plate 15 is supported on the height adjustment screw 17; the height is adjusted by the height adjustment screw 17, and locked by the locking nut 18. Therefore, when the main shaft 5 rotates to 0°, the support stop is achieved by the cooperation of the limit plate 15 and the height adjustment screw 17.

[0038] Specifically, a rectangular hole 101 is provided on the special-shaped ring 10, and the cross-sectional shape of the locking shaft segment 51 is rectangular. Generally speaking, the rectangle mentioned here is a square. Therefore, when rotating 90° and 0°, the rectangular hole 101 can match the cross-sectional shape of the locking shaft segment 51.

[0039] Specifically, the sliding seat 9 is used to guide the sliding of the special-shaped ring 10 to avoid interference of the rectangular hole 101 with the rotation of the main shaft 5, wherein the sliding seat 9 includes a supporting base plate 91 installed on the base 1 and two supporting seats 92 installed at intervals on the supporting base plate 91, and the two supporting seats 92 are installed with parallel sliding rods 93 at intervals. The special-shaped ring 10 is slidably installed on the sliding rods 93, and the bottom of the special-shaped ring 10 is formed with sliding support by the two sliding rods 93, thereby ensuring that there is no possibility of tilting during the sliding process.

[0040] At the same time, a strip hole 94 for adjusting the installation position is opened on the support base plate 91. The installation position of the support base plate 91 relative to the base 1 can be adjusted through the strip hole 94 to achieve adaptive adjustment of the matching axis between the special-shaped ring 10 and the main shaft 5, as well as the matching axis with the electromagnetic push rod 11.

[0041] Specifically, the main shaft 5 includes a mounting section 52 connected to the locking shaft section 51 and a driving connection section 53, the first grounding knife bracket 6 and the second grounding knife bracket 7 are fixed on the mounting section 52, the driving connection section 53 is connected to a rotation drive mechanism, the size of the driving connection section 53 is smaller than the size of the cable shaft section, and when the special-shaped ring 10 is pushed to the driving connection section 53, the driving connection section 53 can rotate relative to the special-shaped ring 10. An insulating gasket or an insulating part is provided in the mounting section 52 to achieve the insulated installation of the first grounding knife bracket 6 and the second grounding knife bracket 7.

[0042] When the main shaft 5 is rotated, the driving is realized by a rotary drive mechanism, and the rotary drive mechanism includes a handle connected to the driving connection section 53, and the operator holds the handle on site to drive the main shaft 5 to rotate. Alternatively, it is a rotary motor connected to the driving connection section 53, which realizes the automatic action process synchronously with the control of the electromagnetic push rod 11.

[0043] Furthermore, at least one mounting block 13 and a micro switch 14 integrated on the mounting block 13 are provided on the driving connection section 53. The rotation state of the main shaft 5 is detected by the micro switch 14, so that after the main shaft 5 is rotated into place, the electromagnetic push rod 11 can automatically complete the locking state. Specifically, the micro switch 14 is also connected to the PLC control box (provided in the power equipment) to realize automatic linkage.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A grounding switch, characterized in that: It comprises a base and three columns installed on the base at intervals, each of the columns is provided with a bracket and a conductive spring fixed on the bracket; A main shaft is rotatably mounted on the base, a first "L"-shaped grounding knife bracket and a second "U"-shaped grounding knife bracket are installed on the main shaft at intervals, grounding knives are installed on the vertical upright plates of the first grounding knife bracket and the vertical upright plates of the second grounding knife bracket at intervals, and the two grounding knives are provided with adjustment screws for adjusting the width, and the two grounding knives are enclosed to form a clamping groove; The base is provided with a sliding seat and a special-shaped ring slidably mounted on the sliding seat, and the base is provided with an electromagnetic push rod for pushing the special-shaped ring to slide; The main shaft is provided with a locking shaft section. When the main shaft is rotated to drive the locking groove and the conductive spring sheet to have a closed state or an open state, the electromagnetic push rod pushes the special-shaped ring to engage with the locking shaft section to limit position.

2. A grounding switch according to claim 1, characterized in that: A limit block for limiting the position of the corresponding grounding knife is provided on one of the upright posts.

3. A grounding switch according to claim 2, characterized in that: A limit plate is installed on the main shaft, a height adjustment screw and a locking nut for tightening the height adjustment screw are provided on the base, and when the engaging groove and the conductive spring sheet are in an open state, the limit plate is supported on the height adjustment screw.

4. A grounding switch according to claim 3, characterized in that: The special-shaped ring is provided with a rectangular hole, and the cross-section of the locking shaft section is rectangular.

5. A grounding switch according to claim 4, characterized in that: The sliding seat comprises a supporting base plate mounted on the base and two supporting seats installed on the supporting base plate at intervals, and parallel sliding rods are installed on the two supporting seats at intervals; The special-shaped ring is slidably mounted on the sliding rod.

6. A grounding switch according to claim 5, characterized in that: The electromagnetic push rod comprises an electromagnetic driving part and a push rod arranged on the electromagnetic driving part, and the push rod passes through the support seat on the corresponding side and is connected to the special-shaped ring; The base is provided with a mounting plate for mounting the electromagnetic driving part.

7. A grounding switch according to claim 6, characterized in that: The supporting bottom plate is provided with strip holes for adjusting the installation position.

8. The grounding switch according to claim 7, characterized in that: The main shaft comprises a mounting section connected to the locking shaft section and a driving connection section, the first grounding knife bracket and the second grounding knife bracket are fixed on the mounting section, and the limiting plate is installed on the mounting section; The driving connection section is connected with a rotation driving mechanism.

9. The grounding switch according to claim 8, characterized in that: The rotary drive mechanism comprises a handle connected to the drive connection section; or a rotary motor connected to the drive connection section.

10. The grounding switch according to claim 9, characterized in that: The drive connection section is provided with at least one mounting block and a micro switch integrated on the mounting block.

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