Relay protection secondary pressing plate structure of power system

Abstract

The utility model relates to and discloses a power system relay protection secondary pressing plate structure, which comprises a pole I, a connecting sheet and two insulating caps, the head end of the connecting sheet is rotatably arranged at the periphery of the pole I, a locking mechanism is arranged between the pole I and the connecting sheet, and the locking mechanism comprises a gear, a brake rod and a spring, the gear is fixedly installed at the lower end of an upper insulating cap of the first pole, the tail end of the brake rod is embedded into a tooth groove of the gear, the brake rod is installed above the connecting piece in a sliding mode, and the two ends of the spring are stretched between the connecting piece and the brake rod respectively; according to the relay protection secondary pressing plate structure of the power system, the tail end of the brake rod is automatically pulled to be close to the contact gear through the elastic pulling force of the spring, and after the tail end of the brake rod is embedded into a tooth groove in the gear, the rotation of the insulating connecting sleeve and the connecting piece is limited, so that the connecting piece can be effectively prevented from being accidentally touched to move.

Description

Technical Field

[0001] The utility model relates to the technical field of protection pressure plates, in particular to a secondary pressure plate structure for relay protection of an electric power system. Background Art

[0002] In the power system, the secondary relay protection is equipped with a protection pressure plate, which is also called a protection connection plate. It is the bridge and link between the protection device and the external wiring, and is related to whether the protection function and action output can function normally; such as the high-voltage connection plate model JL1-2.5 / 2E, refer to Figure 1 The high-voltage connecting piece includes a plastic shell 21, a pole 1, a pole 2 and a connecting piece 3. The pole 1 and the pole 2 are fixedly and symmetrically installed on both sides of the top of the plastic shell 21. The front end of the connecting piece 3 is rotatably installed on the periphery of the pole 1. The connecting piece 3 is used to connect or disconnect the circuit between the pole 1 and the pole 2 by reciprocating rotation.

[0003] However, in the prior art, the front end of the connecting piece 3 of the high-voltage connecting piece is not provided with a locking mechanism for prohibiting rotation, and the rotating connecting piece 3 is very likely to be moved by an electrician or an object accidentally hitting it, thereby disconnecting or connecting the circuit. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that in the prior art, the front end of the connecting piece 3 of the high-voltage connecting piece is not provided with a locking mechanism for prohibiting rotation, and the rotating connecting piece 3 is very likely to be moved by an electrician or an object accidentally hitting it, thereby disconnecting or connecting the circuit, and a secondary pressure plate structure for relay protection of the power system is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A secondary pressure plate structure for relay protection of an electric power system, comprising a pole 1, a connecting piece and two insulating caps, wherein the head end of the connecting piece is rotatably mounted on the periphery of the pole 1, one of the insulating caps is fixedly mounted on the periphery of the pole 1, and a locking mechanism is provided between the pole 1 and the connecting piece;

[0007] The locking mechanism includes a gear, a brake rod and a spring. The gear is fixedly mounted on the lower end of the insulating cap head on the pole. The end of the brake rod and the tooth groove of the gear are engaged with each other. The brake rod is slidably mounted above the connecting plate in parallel. The two ends of the spring are respectively stretched between the connecting plate and the brake rod. The locking mechanism is used to automatically pull the end of the brake rod close to the gear through the elastic force of the spring.

[0008] Preferably, an insulating connecting sleeve is fixedly mounted on the outer surface of the connecting piece, four wheel frames are fixedly mounted on the insulating connecting sleeve, rollers are rotatably mounted in the four wheel frames, and the four rollers are respectively clamped and mounted on both sides of the brake rod.

[0009] Preferably, two mutually parallel guide plates are fixedly mounted on both sides of the brake rod, and the four rollers are respectively rollingly mounted in the four guide plates.

[0010] Preferably, two cylinders are fixedly installed on both sides of the right end of the brake rod, and an n-shaped frame is installed in the four cylinders. The lower end of the n-shaped frame is rotatably installed on the insulating connecting sleeve, and the upper end of the n-shaped frame is fixedly connected to a pull rod.

[0011] Preferably, an insulating block is fixedly mounted on the upper end of the insulating connecting sleeve, a hollow cavity is provided in the insulating block, and the four rollers and the spring are all provided in the hollow cavity.

[0012] Preferably, both end openings of the hollow cavity are installed with cover plates, the brake rod slides through one of the cover plates, the head end of the spring is fixedly connected to the brake rod through a fixing block, and the end of the spring is fixedly installed on the two wheel frames through a connecting frame.

[0013] Compared with the prior art, the utility model provides a secondary pressure plate structure for relay protection of a power system, which has the following beneficial effects:

[0014] The secondary pressure plate structure of the power system relay protection automatically pulls the end of the brake rod close to the contact gear through the elastic tension of the spring, and when the end of the brake rod is embedded in the tooth groove of the gear, the rotation of the insulating connection sleeve and the connection piece is restricted, which can effectively prevent the connection piece from being accidentally touched and moved. In particular, after the connection piece is disconnected, when the electrician repairs the circuit, it can prevent the electrician from accidentally connecting the circuit due to mistaken operation, which can effectively protect the safety of the electrician;

[0015] When the connecting piece needs to be connected or disconnected, just hold the insulating block to operate the connecting piece and move the top of the pull rod close to the insulating block to rotate the connecting piece. The moving pull rod pushes the two cylinders to the left, causing the brake rod to move to the left along the four rollers, thereby moving the end of the brake rod away from the gear, releasing the restriction of the gear on the brake rod, and the connecting piece can be rotated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a high-voltage connecting piece in the prior art;

[0017] Figure 2 This is a schematic diagram of the structure of a secondary pressure plate for relay protection of a power system proposed by the utility model;

[0018] Figure 3 This is a partial cross-sectional view of a secondary pressure plate structure of a power system relay protection proposed by the utility model;

[0019] Figure 4 The utility model is a schematic diagram of a locking mechanism in a secondary pressure plate structure of a power system relay protection.

[0020] In the figure: 1, pole one; 2, pole two; 3, connecting plate; 4, insulating connecting sleeve; 5, insulating block; 6, hollow cavity; 7, insulating cap head; 8, gear; 9, cover plate; 10, pull rod; 11, brake rod; 12, wheel frame; 13, roller; 14, guide plate; 15, spring; 16, fixing block; 17, connecting frame; 18, cylinder; 19, n-shaped frame; 20, connecting groove; 21, plastic shell. DETAILED DESCRIPTION

[0021] 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.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] See attached Figure 1-4 A secondary pressure plate structure of a power system relay protection, specifically taking a high-voltage connector of model JL1-2.5 / 2E as an example, the appearance of the high-voltage connector of model JL1-2.5 / 2E in the prior art is as follows Figure 1 The high-voltage connecting piece is also called a high-voltage protection pressure plate, which is arranged in the secondary circuit of the relay protection of the power system. The secondary pressure plate structure of the relay protection of the power system includes a plastic shell 21, a pole 1, a pole 2 and a connecting piece 3. The pole 1, the pole 2 and the connecting piece 3 are all made of brass. The pole 1 and the pole 2 are fixedly and symmetrically installed on both sides of the top of the plastic shell 21. As is known to all, the head end of the connecting piece 3 is provided with a circular hole that is mutually embedded with the outer wall of the pole 1, which is used to sleeve the circular hole at the head end of the connecting piece 3 on the periphery of the pole 1, so as to rotatably connect the pole 1 and the head end of the connecting piece 3. The end of the connecting piece 3 is provided with a connecting groove 20, and the inner cavity shape of the connecting groove 20 is U-shaped;

[0024] The preset rotation path of the connecting groove 20 at the end of the connecting piece 3 passes through the pole 2 2, so that the connecting groove 20 at the end of the connecting piece 3 can be clamped on the periphery of the pole 2 2, the inner wall of the connecting groove 20 and the pole 2 2 are interlocked with each other, and the upper end faces of the poles 1 and 2 are fixedly connected with insulating cap heads 7, and secondly, an insulating connecting sleeve 4 is fixedly installed on the periphery of the main body of the connecting piece 3, and an insulating block 5 is fixedly installed on the upper end of the insulating connecting sleeve 4, and the insulating block 5 assists electricians in rotating the insulating connecting sleeve 4 and the connecting piece 3, and a hollow cavity 6 is arranged in the insulating block 5.

[0025] As can be seen from the above, part of the structure of the high-voltage connecting piece in the prior art will be introduced below. The main improved part of the present application is mainly achieved by setting a locking mechanism between the connecting piece 3 and its head end pole 1, that is, a locking mechanism is set between the connecting piece 3 and the pole 1, and the self-locking function of the locking mechanism limits the movement of the connecting piece 3 to prevent the connecting piece 3 from accidentally touching the connecting circuit.

[0026] In this embodiment, the locking mechanism includes a gear 8, a brake rod 11 and a spring 15. A plurality of densely arranged tooth grooves are arranged on the outer ring of the gear 8. The gear 8 replaces the lower end portion of the insulating cap head 7 above the pole 1, that is, the insulating cap head 7 and the gear 8 are fixedly connected. The end of the brake rod 11 and the tooth groove in the gear 8 are interlocked with each other. The brake rod 11 is horizontally slidably installed above the insulating connecting sleeve 4. The head end of the brake rod 11 is slidably arranged in the hollow cavity 6 in the insulating block 5. The head end of the spring 15 is fixedly installed on the brake rod 11 through a fixed block 16. The end of the spring 15 is fixedly connected to the insulating connecting sleeve 4. The spring 15 in this application is always in a stretched state, and the elastic tension of the spring 15 is used to automatically pull the end of the brake rod 11 close to the contact gear 8. When the end of the brake rod 11 is embedded in the tooth groove in the gear 8, it is used to limit the rotation of the insulating connecting sleeve 4 and the connecting plate 3, which can effectively prevent the connecting plate 3 from being accidentally touched and moved.

[0027] In this embodiment, two mutually parallel guide plates 14 are fixedly installed on opposite end surfaces of both sides of the brake rod 11, and the guide plates 14 and the brake rod 11 are parallel to each other, so that a guide groove is formed between the two guide plates 14 and the brake rod 11, and two rollers 13 are rollingly installed in the two guide grooves, that is, four rollers 13 are rollingly clamped and installed on both sides of the brake rod 11, and the upper and lower ends of the rollers 13 are respectively in contact with the two guide plates 14. A wheel frame 12 is provided on one side of the roller 13, and the roller 13 and the wheel frame 12 are rotatably connected. The lower end of the wheel frame 12 is fixedly installed on the insulating connecting sleeve 4, and a connecting frame 17 is fixedly installed on the two right wheel frames 12. The connecting frame 17 and the end of the spring 15 are fixedly connected, that is, the end of the spring 15 is fixedly installed on the insulating connecting sleeve 4 and the connecting piece 3 through the connecting frame 17 and the two right wheel frames 12;

[0028] The four rollers 13, the four wheel frames 12 and the spring 15 are all arranged in the hollow cavity 6 in the insulating block 5, and the cover plates 9 are clamped in the openings at both ends of the hollow cavity 6. The brake rod 11 slides through the cover plate 9 on the right side, and the four rollers 13, the four wheel frames 12 and the spring 15 are hidden in the hollow cavity 6. One is to keep the surface of the insulating connecting sleeve 4 clean, and the other is to protect the four rollers 13, the four wheel frames 12 and the spring 15.

[0029] In this embodiment, an n-shaped frame 19 is rotatably installed on the upper end surface of the insulating connecting sleeve 4 through a rotating shaft, the right end of the brake rod 11 is arranged in the n-shaped frame 19, and a pull rod 10 is fixedly installed on the upper end of the n-shaped frame 19. Four cylinders 18 are symmetrically arranged on both sides of the n-shaped frame 19. The four cylinders 18 are respectively fixedly installed on both sides of the brake rod 11, and the four cylinders 18 are always in contact with both sides of the n-shaped frame 19. The pull rod 10 is larger than the length of the n-shaped frame 19. By utilizing the principle of lever, the pull rod 10 can be pulled more effortlessly.

[0030] The utility model utilizes the elastic tension of the spring 15 to automatically pull the end of the brake rod 11 close to the contact gear 8, and when the end of the brake rod 11 is embedded in the tooth groove of the gear 8, the rotation of the insulating connecting sleeve 4 and the connecting piece 3 can be limited, and the connecting piece 3 can be effectively prevented from being accidentally touched and moved. In particular, after the connecting piece 3 is disconnected, when the electrician repairs the circuit, the electrician can avoid accidentally connecting the circuit due to erroneous operation, which can effectively protect the safety of the electrician;

[0031] When it is necessary to connect or disconnect the connecting piece 3, just hold the insulating block 5 to operate the connecting piece 3, and move the top end of the pull rod 10 close to the insulating block 5, so that the connecting piece 3 can be rotated. The moving pull rod 10 pushes the two cylinders 18 to the left, so that the brake rod 11 moves to the left along the four rollers 13, thereby moving the end of the brake rod 11 away from the gear 8, releasing the restriction of the gear 8 on the brake rod 11.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A secondary pressure plate structure for relay protection of an electric power system, comprising a pole (1), a connecting piece (3) and two insulating caps (7), wherein the head end of the connecting piece (3) is rotatably mounted on the periphery of the pole (1), and one of the insulating caps (7) is fixedly mounted on the periphery of the pole (1), characterized in that: A locking mechanism is provided between the pole 1 (1) and the connecting piece (3); The locking mechanism comprises a gear (8), a brake rod (11) and a spring (15); the gear (8) is fixedly mounted on the lower end of the insulating cap head (7) on the pole (1); the end of the brake rod (11) and the tooth groove of the gear (8) are engaged with each other; the brake rod (11) is slidably mounted above the connecting plate (3) in parallel; the two ends of the spring (15) are respectively stretched between the connecting plate (3) and the brake rod (11); the locking mechanism is used to automatically pull the end of the brake rod (11) close to the gear (8) through the elastic force of the spring (15).

2. The secondary pressure plate structure of a power system relay protection according to claim 1, characterized in that: An insulating connection sleeve (4) is fixedly mounted on the outer surface of the connection piece (3), four wheel frames (12) are fixedly mounted on the insulating connection sleeve (4), rollers (13) are rotatably mounted in the four wheel frames (12), and the four rollers (13) are respectively clamped and mounted on both sides of the brake rod (11).

3. The secondary pressure plate structure of a power system relay protection according to claim 2, characterized in that: Two mutually parallel guide plates (14) are fixedly mounted on both sides of the brake rod (11), and the four rollers (13) are respectively rollingly mounted in the four guide plates (14).

4. The secondary pressure plate structure of a power system relay protection according to claim 2, characterized in that: Two cylinders (18) are fixedly installed on both sides of the right end of the brake rod (11), and an n-shaped frame (19) is installed in the four cylinders (18). The lower end of the n-shaped frame (19) is rotatably installed on the insulating connecting sleeve (4), and the upper end of the n-shaped frame (19) is fixedly connected to the pull rod (10).

5. The secondary pressure plate structure of a power system relay protection according to claim 2, characterized in that: An insulating block (5) is fixedly mounted on the upper end of the insulating connection sleeve (4), a hollow cavity (6) is provided in the insulating block (5), and the four rollers (13) and the spring (15) are all arranged in the hollow cavity (6).

6. The secondary pressure plate structure of a power system relay protection according to claim 5, characterized in that: Both end openings of the hollow cavity (6) are provided with cover plates (9), the brake rod (11) slides through one of the cover plates (9), the head end of the spring (15) is fixedly connected to the brake rod (11) via a fixing block (16), and the tail end of the spring (15) is fixedly installed on the two wheel frames (12) via a connecting frame (17).

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