A heavy hammer structure and gas relay

Abstract

The utility model relates to gas relay technical field, concretely relates to a heavy hammer structure and gas relay, heavy hammer structure includes main part and the connecting portion connected with main part, the connecting portion is suitable for installing heavy hammer on gas relay, the radial side surface area of main part is less than axial end surface area, the radial side surface is the circumferential surface around vertical central axis, the axial end surface is the up and down end surface perpendicular to vertical central axis, the utility model discloses through heavy hammer structure, makes heavy hammer main part radial side surface area less than axial end surface area, compared with traditional heavy hammer, when its vibration can increase the damping of main part in gas relay oil chamber, thereby reduces swing amplitude, this structure design reduces the opening cup false swing of gas relay in the anti -vibration test or actual operation because of heavy hammer swing from the root, avoids the false suction of reed contact, significantly improves the anti -vibration reliability of gas relay.

Description

Technical Field

[0001] This utility model relates to the field of gas relay technology, specifically to a counterweight structure and a gas relay. Background Technology

[0002] During normal operation of the transformer, the gas relay is filled with transformer oil. The open cup floats upwards under the combined action of its own buoyancy and the weight of the counterweight. At this time, both the light and heavy gas reed contacts are open. When a minor fault occurs inside the transformer oil tank, the gas generated inside the transformer oil tank will accumulate in the upper gas chamber of the gas relay, forcing the oil level to drop. The open cup is less buoyant and, under the action of the counterweight, it drops to a specific position. When it reaches this position, the light gas reed contact closes under the action of magnetic force, connecting the designated signal circuit and issuing an alarm signal.

[0003] Gas relays need to be tested before installation because they are not set to a fixed value at the factory according to the requirements of the equipment they are installed in. Therefore, even if the relay itself is qualified, it still needs to be calibrated before installation to ensure that the relay can operate reliably. Among the calibration items for gas relays is vibration resistance. The vibration resistance test involves filling the gas relay with clean transformer oil, connecting an indicating device to the trip contact, and then mounting it on a vibration table for vibration testing.

[0004] like Figure 1 As shown, the traditional weight structure of a gas relay generally adopts the shape of an abacus bead. In vibration tests, the swing amplitude of the weight is large, which leads to an increase in the swing amplitude of the open cup and makes it prone to false tripping. Currently, the position of the weight is often adjusted to reduce false tripping, but this method can easily lead to a decrease in the sensitivity of the gas relay under light gas conditions.

[0005] To solve the above technical problems, a weight structure with strong vibration resistance and the ability to ensure the sensitivity of the gas relay was introduced. Utility Model Content

[0006] In view of this, the present invention provides a counterweight structure and a gas relay, which not only ensures the sensitivity of the gas relay, but also has strong vibration resistance and is not prone to false triggering.

[0007] To solve the above-mentioned technical problems, this utility model provides a counterweight structure, including a main body and a connecting part connected to the main body. The connecting part is suitable for mounting the counterweight on a gas relay. The radial side surface area of ​​the main body is smaller than the axial end surface area. The radial side surface is an outer peripheral surface surrounding a vertical central axis, and the axial end surface is an upper and lower end surface perpendicular to the vertical central axis.

[0008] Furthermore, the main body is flat.

[0009] Furthermore, the width of the main body is greater than its thickness.

[0010] Furthermore, the outer wall of the connecting part is provided with mounting holes.

[0011] Furthermore, the connecting part and the main body are integrally formed.

[0012] Another aspect of this utility model provides a gas relay, which includes a counterweight structure and a gas relay body. The gas relay body includes an open cup, a fixed frame, and a reed switch. The open cup is mounted on the fixed frame via a rotating shaft and a bearing, and the open cup is connected to the counterweight via the fixed shaft.

[0013] Furthermore, a bushing is fitted on the outer wall of the fixed shaft near the open cup, and a groove is provided on the outer wall of the bushing near the rotating shaft, the groove corresponding to the position of the rotating shaft.

[0014] Furthermore, locking nuts for fixing and adjusting the position of the weight are provided on both sides of the connection between the weight and the fixed shaft.

[0015] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0016] 1. This utility model utilizes a counterweight structure, making the radial side surface area of ​​the counterweight body smaller than the axial end surface area. Compared to the traditional "abacus bead" shaped counterweight, this increases the damping of the main body within the gas relay oil chamber during vibration, thereby reducing the oscillation amplitude. This structural design fundamentally reduces the erroneous oscillation of the open cup of the gas relay caused by counterweight shaking during vibration tests or actual operation, avoids the erroneous engagement of the reed contacts, and significantly improves the vibration resistance reliability of the gas relay. Furthermore, compared to traditional technologies, there is no need to adjust the counterweight position to suppress erroneous operation, thus effectively avoiding the problem of light gas action threshold shift and sensitivity reduction caused by counterweight position adjustment, and solving the problem of "difficulty in balancing vibration resistance and sensitivity" with traditional counterweights.

[0017] 2. The main body and connecting part of the counterweight of this utility model adopt an integral molding structure, which not only enhances the overall structural strength and rigidity and reduces the risk of loosening or deformation of parts during vibration, but also simplifies the manufacturing process and reduces production errors. The mounting holes and locking nut structure of the gas relay provided in the connecting part not only facilitate the quick assembly of the counterweight and the fixed shaft, but also allow for precise adjustment and locking of the counterweight position, ensuring the connection stability between the counterweight and the open cup. At the same time, the bushing and groove design on the fixed shaft are precisely matched with the rotating shaft, further limiting the radial sway of the open cup and the counterweight, and improving the accuracy and operational stability of the gas relay from the overall structure. Attached Figure Description

[0018] Figure 1 This is a partial structural diagram of a gas relay in the prior art;

[0019] Figure 2 This is a partial structural schematic diagram of the gas relay body in this utility model;

[0020] Figure 3 This is a partial structural diagram of another part of the gas relay body of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the open cup and the counterweight in one embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of an open cup according to one embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the counterweight structure in one embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of another counterweight structure in one embodiment of the present invention.

[0025] In the diagram: 1. Gas relay body; 101. Fixing bracket; 102. Open cup; 1021. Permanent magnet; 103. Reed switch; 2. Counterweight; 201. Main body; 202. Connecting part; 203. Mounting hole; 3. Bearing; 4. Rotating shaft; 5. Fixing shaft; 6. Bushing; 601. Groove; 7. Locking nut. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-7 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0027] As is known, when the transformer is operating normally, the gas relay is filled with transformer oil. The open cup 102 is in a floating state under the combined action of its own buoyancy and the gravity of the counterweight 2. At this time, the light gas reed contacts are all in the open state. When a minor fault occurs inside the transformer oil tank, the gas generated inside the transformer oil tank will accumulate in the upper gas chamber of the gas relay, forcing the oil level to drop. The buoyancy of the open cup 102 decreases. Under the action of the counterweight 2, when it drops to a certain position, the reed contacts will be attracted by the magnetic force, connecting the designated signal circuit and issuing an alarm signal.

[0028] There are various vibration sources in the operation of transformers and in the external environment. The vibration resistance test of gas relays is the key to ensuring that the protection function does not fail under vibration environment.

[0029] In existing technologies, such as Figure 1 As shown, the traditional gas relay's counterweight 2 structure generally adopts an "abacus bead" shape. In vibration tests, the counterweight 2 swings with a large amplitude, which leads to an increase in the swing amplitude of the open cup 102, making it prone to malfunction. Currently, the position of the counterweight 2 is often adjusted to reduce malfunctions, but this method can easily lead to a decrease in the sensitivity of the gas relay under light gas conditions.

[0030] This utility model, such as Figure 2-5 As shown: A gas relay includes a counterweight 2 structure and a gas relay body 1. The gas relay body 1 includes an open cup 102, a fixed frame 101, and a reed switch 103. The open cup 102 is mounted on the fixed frame 101 via a rotating shaft 4 and a bearing 3. The open cup 102 and the counterweight 2 are connected via a fixed shaft 5. A permanent magnet 1021 is installed on the outer side of the open cup 102 near the reed switch 103. In this embodiment, under normal conditions, the gas relay is filled with oil, and the permanent magnet 1021 maintains a certain distance from the reed switch 103. When a fault occurs inside the transformer, the transformer oil decomposes to produce gas. At this time, the open cup 102 rotates downward, and the gas relay is activated.

[0031] In the vibration test, the gas relay is kept full of oil. The gas relay is tested on the vibration test bench. Due to the axial force on the gas relay, the open cup 102 and the weight 2 will swing back and forth. The traditional weight 2 structure has less damping when swinging up and down, which leads to an increase in the swing amplitude of the weight 2 and the open cup 102, resulting in false triggering. The weight 2 structure adopted in this utility model can increase the axial damping of the weight 2 in the gas relay when it is full of oil, thereby reducing the risk of false triggering.

[0032] In another aspect, a bushing 6 is fitted on the outer wall of the fixed shaft 5 near the open cup 102. A groove 601 is provided on the outer wall of the bushing 6 near the rotating shaft 4. The groove 601 corresponds to the position of the rotating shaft 4. The bushing 6 and the groove 601 on the fixed shaft 5 are designed to fit precisely with the rotating shaft 4, which further restricts the radial sway of the open cup 102 and the counterweight 2, and improves the accuracy and operational stability of the gas relay from the overall structure.

[0033] Locking nuts 7 for fixing and adjusting the position of the weight 2 are provided on both sides of the connection between the weight 2 and the fixed shaft 5. The mounting hole 203 and the locking nut 7 matching the gas relay provided in the connection part 202 not only facilitate the quick assembly of the weight 2 and the fixed shaft 5, but also accurately adjust and lock the position of the weight 2, ensuring the connection stability between the weight 2 and the open cup 102.

[0034] Specifically, such as Figure 3-7 A disclosed structure of a counterweight 2 includes a main body 201 and a connecting part 202 connected to the main body 201. The connecting part 202 is suitable for mounting the counterweight 2 on a gas relay. The radial side surface area of ​​the main body 201 is smaller than the axial end surface area. The radial side surface is an outer peripheral surface surrounding a vertical central axis, and the axial end surface is an upper and lower end surface perpendicular to the vertical central axis.

[0035] This structural design fundamentally reduces the erroneous swing of the open cup 102 caused by the shaking of the weight 2 during vibration tests or actual operation of the gas relay, increases the resistance of the weight 2 in the oil flow, avoids the false engagement of the reed contacts, and significantly improves the vibration resistance reliability of the gas relay. In addition, compared with traditional technology, there is no need to suppress false operation by adjusting the position of the weight 2, thus effectively avoiding the problem of light gas action threshold shift and sensitivity reduction caused by the adjustment of the position of the weight 2, and solving the problem of "difficulty in balancing vibration resistance and sensitivity" in traditional weight 2.

[0036] In one embodiment of this utility model, in order to make the weight 2 relatively stable when subjected to force in the axial direction, the width of the main body 201 is greater than its thickness, and furthermore, the shape of the main body 201 can be set to flat.

[0037] In this utility model, the main body 201 and the connecting part 202 of the hammer 2 adopt an integral molding structure, which not only enhances the overall structural strength and rigidity and reduces the risk of loosening or deformation of the parts during vibration, but also simplifies the manufacturing process and reduces production errors.

[0038] In the above embodiments, the center of gravity and overall weight of the present invention's counterweight 2 are consistent with the center of gravity and weight of the traditional gas relay counterweight 2 of the same specification. This method enables quick installation and adjustment, and provides better matching.

[0039] In this utility model, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; 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 a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A counterweight structure, characterized in that: It includes a main body and a connecting part connected to the main body. The connecting part is suitable for mounting a counterweight on a gas relay. The radial side surface area of ​​the main body is smaller than the axial end surface area. The radial side surface is an outer peripheral surface surrounding a vertical central axis. The axial end surface is an upper and lower end surface perpendicular to the vertical central axis.

2. The counterweight structure as described in claim 1, characterized in that: The main body is flat.

3. The counterweight structure as described in claim 1, characterized in that: The width of the main body is greater than its thickness.

4. The counterweight structure as described in claim 1, characterized in that: The outer wall of the connecting part is provided with mounting holes.

5. The counterweight structure as described in claim 1, characterized in that: The connecting part and the main body are integrally formed.

6. A gas relay, characterized in that: The gas relay includes the counterweight structure as described in any one of claims 1-4, and the gas relay also includes a gas relay body. The gas relay body includes an open cup, a fixed frame, and a reed switch. The open cup is mounted on the fixed frame via a rotating shaft and a bearing, and the open cup is connected to the counterweight via the fixed shaft.

7. A gas relay as described in claim 6, characterized in that: A bushing is fitted on the outer wall of the fixed shaft near the open cup. A groove is provided on the outer wall of the bushing near the rotating shaft, and the groove corresponds to the position of the rotating shaft.

8. A gas relay as described in claim 6, characterized in that: Locking nuts for fixing and adjusting the position of the weight are provided on both sides of the connection between the weight and the fixed shaft.

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