Linkage mechanism for automatically pushing out grounding switch of high-voltage cabinet

Abstract

The utility model discloses a linkage mechanism for automatically pushing out a grounding switch of a high-voltage cabinet, and belongs to the field of high-voltage cabinet equipment. Comprising a grounding switch structure, the grounding switch structure comprises a base, a universal driving shaft is rotatably arranged on the base, a mounting plate is fixed on the universal driving shaft, and a switch blade is arranged on the mounting plate; wherein a first cam is arranged on the linkage shaft, and a limiting groove is formed in the linkage shaft. The device has the beneficial effects that when the first cam drives the linkage shaft to rotate, due to the arrangement of the limiting groove, the contact area between the first cam and the linkage shaft can be increased, and meanwhile the phenomenon that the first cam slips when driving the linkage shaft is prevented. The knife switch of the device is also provided with a clamping device for controlling the clamping of the blade. The two blades are pressed through the clamping device, the gap between the two blades is reduced, the position of the connecting shaft can be adjusted through the arrangement of the mounting groove, and after the position of the connecting shaft is adjusted, the bending amplitude of the blades can be adjusted.

Description

Technical Field

[0001] The utility model relates to a linkage mechanism for automatically pushing out the earthing switch of a high-voltage cabinet, belonging to the field of high-voltage cabinet equipment. Background Art

[0002] The earthing switch is a safety interlock mechanism installed in a high-voltage switchgear to replace the earthing wire. According to the requirements of the five-prevention, the earthing switch can only be closed when the equipment is under maintenance and the circuit breaker and disconnector are disconnected, which is equivalent to an earthing wire. During normal operation, the earthing switch must be open, and usually, a mechanical interlock device is provided in the equipment.

[0003] Currently, for the opening of the earthing switch, generally, a linkage shaft is used to drive multiple knife blades. However, when controlling the rotation of the linkage shaft, due to the elastic resistance from the spring during the opening process, slipping may occur at the mating part of the linkage shaft and the cam, resulting in the failure of opening the switch; therefore, the structure of the linkage shaft and the cam needs to be improved.

[0004] Meanwhile, when the knife blade is connected to the terminal, a clamping method is adopted. However, this method will apply a force to the knife blade, causing deformation of the knife blade. After deformation, the knife blade and the terminal will not fit tightly, ultimately leading to an open circuit. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a linkage mechanism for automatically pushing out the earthing switch of a high-voltage cabinet, which can effectively solve the above problems.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] It includes an earthing switch structure, the earthing switch structure includes a base, a linkage shaft is rotatably arranged on the base, a mounting plate is fixed on the linkage shaft, and a knife blade is arranged on the mounting plate.

[0008] Wherein, a first cam is arranged on the linkage shaft, and a limiting groove is arranged on the linkage shaft.

[0009] Furthermore: The knife blade includes blades fixed on both sides of the mounting plate and a clamping device for controlling the clamping of the blades; the clamping device includes a mounting groove arranged in the middle of the upper end surface of the blade, the mounting groove penetrates both sides of the blade, a connecting shaft is arranged in the mounting groove, and first pressing nuts are threadedly connected to both ends of the connecting shaft.

[0010] Furthermore: A plurality of elastic pieces are sleeved on both ends of the connecting shaft, and the first pressing nut presses on the elastic pieces.

[0011] Furthermore, an automatic pushing device is also provided on the linkage shaft. The automatic pushing device includes a second cam mounted on the linkage shaft and a convex plate mounted on the mounting plate. An installation hole is provided on the convex plate, and an installation shaft is provided in the installation hole. One end of a spring member is rotatably connected to the installation shaft, and the other end of the spring member is rotatably connected to the base. A pressing plate is also provided on the second cam.

[0012] Furthermore, the spring member includes a compression spring and a lower plate and an upper plate provided at both ends of the compression spring. A hinge plate is provided on the end face of the upper plate, and the hinge plate is fixedly connected to the installation shaft. A limiting post is provided on the other end face of the upper plate.

[0013] Furthermore, the number of the knife switches is set to three, and the knife switches are connected by a connecting component. The connecting component includes a U-shaped plate and a connecting rod. The end of the connecting rod is fixed on the U-shaped plate. The lower part of the knife switch and the upper part of the mounting plate are both arranged in the U-shaped plate, and a second compression nut is provided at the end of the connecting rod.

[0014] The beneficial effects are as follows:

[0015] When the first cam drives the linkage shaft to rotate, due to the setting of the limiting groove, the contact area between the first cam and the linkage shaft can be increased, and at the same time, a clamping position can be formed during rotation to prevent slipping when the first cam drives the linkage shaft.

[0016] Therefore, a clamping device for controlling the clamping of the blades is also provided on the knife switch. When the two blades are deformed, the two first compression nuts can be rotated and adjusted simultaneously. The first compression nut rotates along the external thread at the end of the connecting shaft and will press on the blades, pressing the two blades to reduce the gap between the two blades. The setting of the installation groove can adjust the position of the connecting shaft. After the position of the connecting shaft is adjusted, the bending amplitude of the blades can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] For ease of explanation, the present invention will be described in detail by the following specific embodiments and accompanying drawings.

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is Figure 1 a partially enlarged view in

[0020] Figure 3 is a front view of the present invention;

[0021] Figure 4 is Figure 3 a partially enlarged view in

[0022] Figure 5 This is the part drawing of the connection component of the present utility model.

[0023] Explanation of reference numerals:

[0024] 1. Base; 2. Linkage shaft; 3. Mounting plate; 4. Knife switch; 5. First cam; 6. Limiting groove; 7. Blade; 8. Clamping device; 81. Mounting groove; 82. Connecting shaft; 83. First compression nut; 84. Elastic sheet; 9. Automatic ejection device; 91. Second cam; 92. Convex plate; 93. Mounting shaft; 94. Spring member; 941. Compression spring; 942. Lower plate; 943. Upper plate; 944. Hinge plate; 945. Limiting post; 10. Connection component; 101. U-shaped plate; 102. Connecting rod; 103. Second compression nut. Detailed implementation manners

[0025] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0026] It should be noted that in the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0027] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0028] Meanwhile, in the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected" and "connected" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] Refer to Figures 1-5 This is an embodiment of the automatic ejection grounding knife linkage mechanism of the high-voltage switch cabinet of the present utility model.

[0030] This device is the grounding knife opening and closing device in the high-voltage cabinet. After the grounding knife is opened, the automatic pushing device 9 can be used to automatically close the grounding knife;

[0031] It includes a grounding knife structure, which includes a base 1. A linkage shaft 2 is rotatably arranged on the base 1. A mounting plate 3 is fixed on the linkage shaft 2, and a knife blade 4 is arranged on the mounting plate 3; Among them, a first cam 5 is arranged on the linkage shaft 2, and a limiting groove 6 is arranged on the linkage shaft 2.

[0032] When the grounding knife is opened, the first cam 5 can be operated to control the rotation of the linkage shaft 2. The rotating linkage shaft 2 will drive the mounting plate 3 to do a circular motion, and at the same time will also drive the knife blade 4 to do a circular motion, so that the knife blade 4 is separated from the knife port; In this device, the linkage shaft 2 is optimized, and a limiting groove 6 is arranged on the linkage shaft 2. At the same time, the connection part between the first cam 5 and the linkage shaft 2 is correspondingly improved. When the first cam 5 drives the linkage shaft 2 to rotate, due to the setting of the limiting groove 6, the contact area between the first cam 5 and the linkage shaft 2 can be increased, and at the same time, a clamping position can be formed during rotation to prevent the phenomenon of slipping when the first cam 5 drives the linkage shaft 2.

[0033] The knife blade 4 in this device includes blades 7 fixed on both sides of the mounting plate 3. Therefore, when connecting to the wiring terminal, the wiring terminal is clamped by the two blades 7. However, after a long time of use, the blades 7 will deform, and the blades 7 cannot clamp the wiring terminal, which will cause a circuit break;

[0034] Therefore, a clamping device 8 for controlling the clamping of the blades 7 is also arranged on the knife blade 4; The clamping device 8 includes a mounting groove 81 arranged in the middle of the upper end face of the blade 7. The mounting groove 81 runs through both sides of the blade 7, and a connecting shaft 82 is arranged in the mounting groove 81. Threaded connections of the two ends of the connecting shaft 82 with first pressing nuts 83.

[0035] When the two blades 7 are deformed, the two first pressing nuts 83 can be rotated and adjusted at the same time. The first pressing nuts 83 rotate along the external threads at the ends of the connecting shaft 82, and will press on the blades 7, pressing the two blades 7 to reduce the gap between the two blades 7. The setting of the mounting groove 81 can adjust the position of the connecting shaft 82. After the position of the connecting shaft 82 is adjusted, the bending amplitude of the blade 7 can be adjusted.

[0036] A number of elastic pieces 84 are also sleeved at both ends of the connecting shaft 82, and the first pressing nuts 83 press on the elastic pieces 84; The main function of using the elastic pieces 84 is that they will not damage the blades 7 during adjustment; Because when the first pressing nut 83 directly contacts the blade 7, since the first pressing nut 83 needs to rotate, it will inevitably cause friction on the surface of the blade 7. This device needs to be powered on. If the surface of the blade 7 is oxidized, it will hinder the normal conduction of the current and will affect the resistance value of the current.

[0037] When the device is switched on, an automatic pushing device 9 is adopted. The automatic pushing device 9 includes a second cam 91 installed on the linkage shaft 2 and a convex plate 92 installed on the mounting plate 3. An installation hole is provided on the convex plate 92, and an installation shaft 93 is arranged in the installation hole. One end of a spring member 94 is rotatably connected to the installation shaft 93, and the other end of the spring member 94 is rotatably connected to the base 1. A pressing plate 95 is also provided on the second cam 91.

[0038] The spring member 94 of this device is always in a compressed state. When the switch is opened, the spring member 94 will be further compressed to store elastic potential energy. When the first cam 5 does not provide a rotational force to the linkage shaft 2, the spring member 94 will directly release the stored elastic potential energy, lift the convex plate 92, drive the mounting plate 3 and the knife switch 4 to clamp on the terminal, and complete the switch-on.

[0039] One end of the spring member 94 of this device is rotatably arranged on the convex plate 92 through the installation shaft 93, and the other end is rotatably connected to the base 1, which can better store and release elastic potential energy.

[0040] When the device is switched off, the pressing plate 95 in this device can directly contact the installation shaft 93. At this time, as the linkage shaft 2 rotates, the pressing plate 95 will also apply a pressure to the installation shaft 93, so that the rotational force from the linkage shaft 2 is transmitted to the spring member 94, and the spring member 94 stores elastic potential energy.

[0041] The spring member 94 of this device includes a compression spring 941 and lower and upper plates 942 and 943 arranged at both ends of the compression spring 941. A hinge plate 944 is provided on the end face of the upper plate 943, and the hinge plate 944 is fixedly connected to the installation shaft 93. A limit post 945 is provided on the other end face of the upper plate 943.

[0042] The function of the lower plate 942 is to rotatably connect the compression spring 941 to the base 1, and the function of the upper plate 943 is to rotatably connect the compression spring 941 to the convex plate 92. The purpose of the hinge plate 944 is to connect to the installation shaft 93, and the setting of the limit post 945 is to limit the compression limit of the compression spring 941.

[0043] The number of knife switches 4 is set to three. The knife switches 4 are connected by a connection component 10. The connection component 10 includes a U-shaped plate 101 and a connecting rod 102. The end of the connecting rod 102 is fixed on the U-shaped plate 101. The lower part of the knife switch 4 and the upper part of the mounting plate 3 are both arranged in the U-shaped plate 101, and a second compression nut 103 is provided at the end of the connecting rod 102.

[0044] Generally, three general earthing switches 4 are provided, and this device is no exception. At the same time, in order to facilitate the synchronous operation of the three switches 4, a connection assembly 10 is provided in this device; the U-shaped plate 101 can clamp the lower part of the switch 4 and the upper part of the mounting plate 3, and then the connecting rod 102 can conduct force and position and install the U-shaped plate 101 at the same time. The second compression nut 103 can provide pressure to the connecting rod 102 and the U-shaped plate 101, so that the U-shaped plate 101 can clamp the upper part of the mounting plate 3 and the lower part of the switch 4.

[0045] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or alterations derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. The high-voltage cabinet automatically pushes out the ground knife linkage mechanism, which is characterized by: The invention comprises a ground knife structure, wherein the ground knife structure comprises a base (1), a linkage shaft (2) is rotatably arranged on the base (1), a mounting plate (3) is fixed on the linkage shaft (2), and a gate knife (4) is arranged on the mounting plate (3); wherein a first cam (5) is arranged on the linkage shaft (2), and a limiting groove (6) is arranged on the linkage shaft (2).

2. The high-voltage cabinet automatic ground knife linkage mechanism according to claim 1 is characterized by: The gate knife (4) comprises blades (7) fixed on both sides of the mounting plate (3) and a clamping device (8) for controlling the clamping of the blade (7); the clamping device (8) comprises a mounting groove (81) arranged in the middle of the upper end surface of the blade (7), the mounting groove (81) passing through both sides of the blade (7), a connecting shaft (82) being arranged in the mounting groove (81), and first clamping nuts (83) being threadedly connected to both ends of the connecting shaft (82).

3. The automatic ground knife linkage mechanism for high-voltage cabinet according to claim 2 is characterized in that: A plurality of spring sheets (84) are sleeved on both ends of the connecting shaft (82), and the first clamping nut (83) is pressed on the spring sheets (84).

4. The automatic ground knife linkage mechanism for high-voltage cabinet according to claim 3 is characterized by: The linkage shaft (2) is also provided with an automatic ejection device (9), the automatic ejection device (9) comprising a second cam (91) mounted on the linkage shaft (2) and a convex plate (92) mounted on the mounting plate (3); the convex plate (92) is provided with a mounting hole, a mounting shaft (93) is provided in the mounting hole, the mounting shaft (93) is rotatably connected to one end of a spring member (94), and the other end of the spring member (94) is rotatably connected to the base (1); the second cam (91) is also provided with a pressure plate (95).

5. The automatic ground knife linkage mechanism for high-voltage cabinet according to claim 4 is characterized in that: The spring member (94) comprises a compression spring (941) and a lower plate (942) and an upper plate (943) arranged at both ends of the compression spring (941); a hinge plate (944) is arranged on the end surface of the upper plate (943); the hinge plate (944) is fixedly connected to the mounting shaft (93); and a limiting column (945) is arranged on the other end surface of the upper plate (943).

6. The automatic ground knife linkage mechanism for high-voltage cabinet according to claim 5 is characterized in that: The number of the gate knives (4) is set to be three, and the gate knives (4) are connected to each other via a connecting assembly (10), the connecting assembly (10) comprising a U-shaped plate (101) and a connecting rod (102), the end of the connecting rod (102) being fixed on the U-shaped plate (101), the lower part of the gate knives (4) and the upper part of the mounting plate (3) are both arranged in the U-shaped plate (101), and a second clamping nut (103) is arranged at the end of the connecting rod (102).

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