PT neutral point secondary grounding protector

Abstract

The utility model belongs to the technical field of electrical equipment, and discloses a PT neutral point secondary grounding protector which comprises a secondary grounding protector body, a reserved groove is formed in the side face of the secondary grounding protector body, an upper clamping block is fixedly connected to the top of the reserved groove, and a lower clamping block is arranged in the reserved groove in a sliding fit mode. A plurality of protrusions are fixedly connected between the opposite faces of the upper clamping block and the lower clamping block, each protrusion is of a metal hemispherical structure, a first spring is arranged between the lower clamping block and the reserved groove, a wire is clamped through the metal spherical protrusions between the upper clamping block and the lower clamping block, damage to the peripheral portion of the wire is small, and the wire can be clamped conveniently. The secondary grounding protector has the advantages that the secondary grounding protector body is provided with the lead, the problem that the service life of the lead is shortened due to damage is avoided, the lead can be clamped and guided through the upper limiting block and the lower limiting block, the lead is guided in the secondary grounding protector body, and the secondary grounding protector body can be protected in an anti-collision mode through the anti-collision plate.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and more specifically, to a PT neutral point secondary grounding protector. Background Art

[0002] The power system relay protection regulations generally require that the neutral points of the substation voltage transformers be grounded uniformly at a centralized point. In order to prevent system overvoltages such as lightning from endangering the safety of people and secondary equipment through the voltage transformer, the conventional design is to install a secondary grounding protector on the secondary neutral point, commonly known as the N line, in the local voltage transformer terminal box to provide safety protection for the stable operation of the power system.

[0003] A new type of secondary grounding protector disclosed by the search publication number CN207069576U includes a main body, and both end faces of the main body are provided with wire entry holes, and the upper surface of the main body is provided with a stuffing hole perpendicular to the wire entry hole, and the stuffing hole is divided into a lower stuffing hole and an upper stuffing hole by the wire entry hole. The installation method of the utility model is: insert the wire into the wire entry hole, at this time the wire is located between the upper gear protrusion and the lower gear protrusion, and then press the button or the insulating column down hard to make the baffle squeeze through the minimum diameter of the retaining ring, that is, the bottom surface, the baffle is stuck and cannot retreat, and the spring is compressed and deformed to generate tension so that the upper gear protrusion and the lower gear protrusion clamp the wire and bite together to complete the wire installation. This solution is simple and quick to operate, without screw connection, and can be installed in one step, avoiding the problem of the wire not being pressed and the screws being loose causing the wire to fall off, and ensuring the reliable connection of the secondary grounding protector to the circuit.

[0004] However, this application has certain shortcomings. The wire is clamped and installed by the tooth-shaped protrusions. The surface of the wire is clamped by the tooth-shaped protrusions, which is easy to cause damage in a long time, resulting in a reduction in the service life of the wire.

[0005] In order to solve the above problems, the present application provides a PT neutral point secondary grounding protector. Utility Model Content

[0006] The present application provides a PT neutral point secondary grounding protector adopts the following technical solution:

[0007] A PT neutral point secondary grounding protector comprises a secondary grounding protector body, a reserved groove is provided on the side of the secondary grounding protector body, an upper clamping block is fixedly connected to the top of the reserved groove, and a lower clamping block is slidably matched inside the reserved groove, a plurality of protrusions are fixedly connected between the opposite surfaces of the upper clamping block and the lower clamping block, and the protrusions are metal hemispherical structures, and a first spring is arranged between the lower clamping block and the reserved groove, a lower limit block is slidably matched in the reserved groove, and a second spring is arranged between the lower limit block and the reserved groove, an upper limit block is fixedly connected to the inner top surface of the reserved groove, and the upper limit block and the lower limit block are relatively distributed, arc grooves are provided between the opposite surfaces of the upper limit block and the lower limit block, and an anti-collision plate is arranged on the outer surface of the secondary grounding protector body.

[0008] Through the above technical scheme, the wire is clamped by the metal spherical protrusion between the upper clamping block and the lower clamping block, and the damage to the outer periphery of the wire is relatively small, thereby avoiding the problem of reduced service life of the wire due to damage. The upper limit block and the lower limit block can clamp and guide the wire to guide it inside the secondary grounding protector body, and the anti-collision plate can provide anti-collision protection for the secondary grounding protector body.

[0009] Furthermore, sleeves are provided at the four corners of the side of the secondary grounding protector body, and a connecting rod is slidably connected in the sleeve, a spring three is provided in the extrusion cavity of the connecting rod and the sleeve, and the side of the connecting rod is fixedly connected to the anti-collision plate.

[0010] Through the above technical solution, the sleeve, the connecting rod and the spring three can reduce the impact of collision on the secondary grounding protector body.

[0011] Furthermore, the four corners of the side surface of the secondary grounding protector body are fixedly connected with a threaded barrel, the outer periphery of the sleeve is provided with an external thread, and the sleeve is threadedly connected to the threaded barrel.

[0012] Through the above technical solution, the anti-collision plate can be easily disassembled through the threaded barrel and the sleeve.

[0013] Furthermore, a sink groove is provided on the side of the secondary grounding protector body, a control rod is fixedly connected between the lower clamping block and the lower limit block, and the control rod is slidably matched with the sink groove.

[0014] Through the above technical solution, the lower clamping block and the lower limit block can be conveniently moved by using the control rod.

[0015] Furthermore, the lower limit block and the lower clamping block are arranged at the same height, and the lower clamping block is arranged hollow.

[0016] Through the above technical solution, the lower limit block and the lower clamping block together limit and clamp the wire.

[0017] Furthermore, the connecting rod is rotatably connected to the anti-collision plate via a bearing, and the anti-collision plate is made of a rubber plate.

[0018] Through the above technical solution, the anti-collision plate has a certain elasticity and can buffer bumps.

[0019] Furthermore, the side surfaces of the lower limit block and the upper limit block are fixedly connected with arc blocks, and the arc blocks are in contact with the top surface of the arc groove.

[0020] Through the above technical solution, the arc block can guide and limit the wire so that the connection between the wire and the secondary grounding protector body remains straight.

[0021] In summary, this application includes the following beneficial technical effects:

[0022] The wire is clamped by the metal spherical protrusion between the upper clamping block and the lower clamping block, which causes less damage to the outer periphery of the wire, thereby avoiding the problem of reduced service life of the wire due to damage. The upper limit block and the lower limit block can clamp and guide the wire to guide it inside the secondary grounding protector body, and the anti-collision plate can provide anti-collision protection for the secondary grounding protector body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 For this application Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 A partial cross-sectional view of the present application;

[0026] Figure 4 This is a schematic diagram of the spring three structures of this application.

[0027] Description of the numbers in the figure:

[0028] 1. Secondary grounding protector body; 2. Upper clamping block; 3. Lower clamping block; 4. Sinking groove; 5. Control rod; 6. Anti-collision plate; 7. Connecting rod; 8. Sleeve; 9. Threaded tube; 10. Reserved groove; 11. Protrusion; 12. Lower limit block; 13. Arc groove; 14. Arc block; 15. Spring one; 16. Spring two; 17. Upper limit block; 18. Spring three. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Example:

[0033] The present application embodiment discloses a PT neutral point secondary grounding protector, see Figure 1 , Figure 2 and Figure 3 , including a secondary grounding protector body 1, a reserved groove 10 is opened on the side of the secondary grounding protector body 1, an upper clamping block 2 is fixedly connected to the top of the reserved groove 10, and a lower clamping block 3 is slidably matched inside the reserved groove 10, and a plurality of protrusions 11 are fixedly connected between the opposite surfaces of the upper clamping block 2 and the lower clamping block 3, and the protrusion 11 is a metal hemispherical structure, and the protrusion 11 is a smooth hemispherical metal, which has a small local pressure on the wire, thereby causing less damage to the outer periphery of the wire, thereby avoiding the problem of reducing the service life of the wire due to damage;

[0034] A spring 15 is provided between the lower clamping block 3 and the reserved groove 10, a lower limit block 12 is slidably matched in the reserved groove 10, and a spring 2 16 is provided between the lower limit block 12 and the reserved groove 10, an upper limit block 17 is fixedly connected to the inner top surface of the reserved groove 10, and the upper limit block 17 and the lower limit block 12 are relatively distributed, and an arc groove 13 is provided between the opposite surfaces of the upper limit block 17 and the lower limit block 12, and the arc groove 13 is used to clamp and guide the wire, so as to guide it inside the secondary grounding protector body 1;

[0035] A sink groove 4 is provided on the side of the secondary grounding protector body 1, and a control rod 5 is fixedly connected between the lower clamping block 3 and the lower limit block 12, and the control rod 5 is slidably matched with the sink groove 4. The lower clamping block 3 and the lower limit block 12 can be conveniently moved by the control rod 5. The lower limit block 12 and the lower clamping block 3 are arranged at the same height, and the lower clamping block 3 is hollow. The sides of the lower limit block 12 and the upper limit block 17 are fixedly connected with arc blocks 14, and the arc blocks 14 are in contact with the top surface of the arc groove 13. The arc block 14 can guide and limit the wire so that the connection between it and the secondary grounding protector body 1 remains straight.

[0036] See also Figure 1 and Figure 4 The outer surface of the secondary grounding protector body 1 is provided with an anti-collision plate 6, and the four corners of the side of the secondary grounding protector body 1 are provided with sleeves 8, and a connecting rod 7 is slidably connected in the sleeve 8, and a spring three 18 is provided in the extrusion cavity of the connecting rod 7 and the sleeve 8, and the side of the connecting rod 7 is fixedly connected to the anti-collision plate 6. Through the sleeve 8, the connecting rod 7 and the spring three 18, the impact of the collision on the secondary grounding protector body 1 can be reduced, and the four corners of the side of the secondary grounding protector body 1 are fixedly connected with a threaded tube 9, the outer periphery of the sleeve 8 is provided with an external thread, and the sleeve 8 is threadedly connected to the threaded tube 9, and the anti-collision plate 6 can be conveniently disassembled through the threaded tube 9 and the sleeve 8, and the connecting rod 7 is rotatably connected to the anti-collision plate 6 through a bearing. The anti-collision plate 6 is made of rubber plate, and the anti-collision plate 6 has a certain elasticity and can buffer collision.

[0037] The implementation principle of this embodiment is: the wire is clamped by the metal spherical protrusion 11 between the upper clamping block 2 and the lower clamping block 3, which causes less damage to the outer periphery of the wire, thereby avoiding the problem of reduced service life of the wire due to damage; the upper limit block 17 and the lower limit block 12 can clamp and guide the wire to guide it inside the secondary grounding protector body 1; the anti-collision plate 6 can be used to provide anti-collision protection for the secondary grounding protector body 1; when the secondary grounding protector body 1 needs to be repaired, the threaded barrel 9 and the sleeve 8 can be loosened to remove the anti-collision plate 6.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A PT neutral point secondary grounding protector, comprising a secondary grounding protector body (1), wherein a reserved groove (10) is provided on the side of the secondary grounding protector body (1), and characterized in that: The top of the reserved groove (10) is fixedly connected with an upper clamping block (2), and the interior of the reserved groove (10) is slidably matched with a lower clamping block (3), a plurality of protrusions (11) are fixedly connected between the opposing surfaces of the upper clamping block (2) and the lower clamping block (3), and the protrusions (11) are metal hemispherical structures, and a spring (15) is provided between the lower clamping block (3) and the reserved groove (10), and a lower limit block (15) is slidably matched in the reserved groove (10). 2), and a spring 2 (16) is arranged between the lower limit block (12) and the reserved groove (10), an upper limit block (17) is fixedly connected to the inner top surface of the reserved groove (10), and the upper limit block (17) and the lower limit block (12) are relatively distributed, and an arc groove (13) is provided between the opposite surfaces of the upper limit block (17) and the lower limit block (12), and an anti-collision plate (6) is arranged on the outer surface of the secondary grounding protector body (1).

2. A PT neutral point secondary grounding protector according to claim 1, characterized in that: The four corners of the side of the secondary grounding protector body (1) are each provided with a sleeve (8), and a connecting rod (7) is slidably connected inside the sleeve (8), a spring three (18) is provided in the extrusion cavity between the connecting rod (7) and the sleeve (8), and the side of the connecting rod (7) is fixedly connected to the anti-collision plate (6).

3. A PT neutral point secondary grounding protector according to claim 2, characterized in that: The four corners of the side surface of the secondary grounding protector body (1) are fixedly connected with a threaded barrel (9), the outer periphery of the sleeve (8) is provided with an external thread, and the sleeve (8) is threadedly connected to the threaded barrel (9).

4. A PT neutral point secondary grounding protector according to claim 1, characterized in that: A sink groove (4) is provided on the side of the secondary grounding protector body (1); a control rod (5) is fixedly connected between the lower clamping block (3) and the lower limit block (12), and the control rod (5) is slidably matched with the sink groove (4).

5. A PT neutral point secondary grounding protector according to claim 1, characterized in that: The lower limit block (12) and the lower clamping block (3) are arranged at the same height, and the lower clamping block (3) is arranged to be hollow.

6. A PT neutral point secondary grounding protector according to claim 2, characterized in that: The connecting rod (7) is rotatably connected to the anti-collision plate (6) via a bearing, and the anti-collision plate (6) is made of a rubber plate.

7. A PT neutral point secondary grounding protector according to claim 1, characterized in that: The side surfaces of the lower limit block (12) and the upper limit block (17) are both fixedly connected with arc blocks (14), and the arc blocks (14) are in contact with the top surface of the arc groove (13).

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