Heat dissipation neutral point resistor cabinet

Abstract

The utility model relates to the technical field of resistor cabinets, and provides a heat dissipation neutral point resistor cabinet which comprises a cabinet body, an opening is formed in the front face of the cabinet body, an opening and closing locking assembly is arranged on the cabinet body, and a heat dissipation ventilation assembly is arranged on the side wall of the cabinet body. The opening and closing locking assembly comprises a buckling cover, the buckling cover is attached to the opening, limiting rails are arranged on the two opposite sides of the opening, the buckling cover is embedded into the limiting rails, an elbow frame is arranged on the side wall of the buckling cover, a locking block is arranged at the tail end of the elbow frame, a locking face is arranged on the locking block, a sliding block is arranged on the side wall of the cabinet body, and a locking strip is arranged at the upper end of the sliding block. By means of the technical scheme, the problems that in the prior art, ventilation needs to be conducted when the resistor cabinet is used, the resistor cabinet is prevented from being affected with damp, and the buckle cover of the resistor cabinet needs to be sealed due to the fact that the buckle cover is in a closed state in the resistor cabinet using process are solved.

Description

Technical Field

[0001] This utility model relates to the field of resistor cabinet technology, specifically to a heat dissipation neutral point resistor cabinet. Background Technology

[0002] Single-phase grounding is the most common fault in generator operation. When an arc grounding occurs at the fault point, it will further amplify the damage to the stator winding insulation and even burn the iron core. If the fault is not detected and quickly cleared in time, it will develop into a phase-to-phase or turn-to-turn short circuit. Therefore, the resistor cabinet is extremely important.

[0003] The resistor cabinet employs high-resistance grounding of the generator neutral point to limit grounding current and prevent damage from various overvoltages. Grounding the neutral point through a resistor limits the fault current to an appropriate value, improving the sensitivity of relay protection to tripping. Simultaneously, it ensures that only minor, localized burns may occur at the fault point, limiting transient overvoltages to 2.6 times the normal line voltage relative to the neutral point voltage. This restricts arc reignition, prevents arc gap overvoltage damage to main equipment, and effectively prevents ferroresonant overvoltages, thus ensuring the safe operation of the generator. It has a good effect on reducing grid overvoltages and improving the safety and reliability of the power grid.

[0004] The following problems exist in the actual use of resistor cabinets: 1. Ventilation is required when using resistor cabinets to avoid moisture problems; 2. The cover of the resistor cabinet is in a closed state during use, so the cover of the resistor cabinet needs to be sealed. In view of this, a heat dissipation neutral point resistor cabinet was developed. Utility Model Content

[0005] This utility model proposes a heat dissipation neutral point resistor cabinet, which solves the problems in related technologies where ventilation is required during the use of the resistor cabinet to prevent moisture from getting into the cabinet, and the cover of the resistor cabinet is in a closed state during use, thus requiring the cover of the resistor cabinet to be sealed.

[0006] The technical solution of this utility model is as follows: including...

[0007] The cabinet has an opening on its front side;

[0008] An opening and closing locking assembly is disposed on the cabinet body;

[0009] A heat dissipation and ventilation assembly is disposed on the side wall of the cabinet;

[0010] The opening and closing locking assembly includes a cover that fits into the opening. Limiting rails are provided on opposite sides of the opening. The cover is embedded in the limiting rails. An elbow bracket is provided on the side wall of the cover. A locking block is provided at the end of the elbow bracket. A locking surface is provided on the locking block. A sliding block is provided on the side wall of the cabinet. A locking strip is provided at the upper end of the sliding block.

[0011] As a further technical solution, the upper end face of the sliding block is provided with a sliding groove, and the bottom of the locking strip is provided with a sliding strip, the sliding strip being embedded inside the sliding groove.

[0012] As a further technical solution, the heat dissipation and ventilation assembly includes an expansion cover, which is disposed on the side wall of the cabinet. The side wall of the expansion cover is provided with ventilation holes, and the cabinet is provided with an air inlet located at the position of the expansion cover.

[0013] As a further technical solution, the number of ventilation holes is several, and the multiple ventilation holes are arranged in a straight line on the expansion cover, and the inner bottom of the expansion cover is provided with an outlet.

[0014] As a further technical solution, the locking surface and the sliding block are parallel to each other, and the locking surface and the sliding block are spliced ​​together to form an integral structure.

[0015] As a further technical solution, the size of the cover matches the size of the opening, the cross-section of the limiting track is C-shaped, and the opposite sides of the cover are located within the limiting track.

[0016] As a further technical solution, a baffle is provided at the upper edge of the ventilation hole, and the baffle is obliquely mounted on the ventilation hole.

[0017] As a further technical solution, a groove with the same shape as the sliding groove is opened on the locking surface, and a part of the sliding strip is embedded in the groove.

[0018] As a further technical solution, an annular sealing gasket is provided at the edge of the opening, and the annular sealing gasket is located inside the limiting track.

[0019] As a further technical solution, a ventilation filter screen is provided on the air inlet, and the ventilation filter screen is embedded inside the well air outlet.

[0020] The working principle and beneficial effects of this utility model are as follows:

[0021] This utility model achieves the following effects: 1. The limiting track on the opening is used to limit the cover, so that the cover can slide up and down. After the cover is pulled down, the opening is closed. At this time, the locking block on the elbow frame is connected with the sliding block. The locking surface coincides with the locking block. After the locking strip is slid, the upper end of the locking strip is pressed against the locking surface. At this time, the cover is locked and positioned; 2. The ventilation holes on the expansion cover are used for ventilation, and the outlet is used for the discharge of particulate dust. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a cross-sectional view of the cabinet body of this utility model;

[0025] Figure 3 This is an isometric view of the sliding block of this utility model;

[0026] Figure 4 This is a top view of the present invention;

[0027] Figure 5 Appendix to this utility model Figure 4 Enlarged view of part A;

[0028] In the diagram: 1. Cabinet; 2. Opening; 3. Opening and locking assembly; 3-1. Cover; 3-2. Limiting track; 3-3. Elbow bracket; 3-4. Locking block; 3-5. Locking surface; 3-6. Sliding block; 3-7. Locking strip; 3-8. Sliding groove; 3-9. Sliding strip; 4. Heat dissipation and ventilation assembly; 4-1. Expansion cover; 4-2. Ventilation hole; 4-3. Air inlet; 5. Exhaust outlet; 6. Baffle; 7. Annular sealing gasket; 8. Ventilation filter mesh. Detailed Implementation

[0029] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0030] like Figures 1-5 As shown, this embodiment proposes a heat dissipation neutral point resistor cabinet, including...

[0031] Cabinet 1, with an opening 2 on the front;

[0032] Opening and closing locking component 3 is installed on cabinet 1;

[0033] Heat dissipation and ventilation component 4 is installed on the side wall of cabinet 1;

[0034] The opening and closing locking assembly 3 includes a cover 3-1, which fits into the opening 2. Limiting rails 3-2 are provided on opposite sides of the opening 2. The cover 3-1 is embedded in the limiting rails 3-2. An elbow bracket 3-3 is provided on the side wall of the cover 3-1. A locking block 3-4 is provided at the end of the elbow bracket 3-3. A locking surface 3-5 is provided on the locking block 3-4. A sliding block 3-6 is provided on the side wall of the cabinet 1. A locking strip 3-7 is provided at the upper end of the sliding block 3-6.

[0035] In this embodiment, the limiting track 3-2 on the opening 2 is used to limit the cover 3-1, so that the cover 3-1 can slide up and down. After the cover 3-1 is pulled down, the opening 2 is closed. At this time, the locking block 3-4 on the elbow frame 3-3 is connected with the sliding block 3-6. At this time, the locking surface 3-5 coincides with the locking block 3-4. After sliding the locking bar 3-7, the upper end of the locking bar 3-7 is pressed against the locking surface 3-5. At this time, the cover 3-1 is locked and positioned.

[0036] Specifically, the upper end face of the sliding block 3-6 is provided with a sliding groove 3-8, and the bottom of the locking strip 3-7 is provided with a sliding strip 3-9, which is embedded in the sliding groove 3-8.

[0037] In this embodiment, the sliding groove 3-8 is used for the sliding bar 3-9 on the locking bar 3-7 to slide.

[0038] Furthermore, the heat dissipation and ventilation component 4 includes an expansion cover 4-1, which is disposed on the side wall of the cabinet 1. The side wall of the expansion cover 4-1 is provided with ventilation holes 4-2, and the cabinet 1 is provided with an air inlet 4-3, which is located at the position of the expansion cover 4-1.

[0039] In this embodiment, the ventilation hole 4-2 on the expansion cover 4-1 is used for ventilation, and the air inlet 4-3 has the same purpose as the ventilation hole 4-2.

[0040] Furthermore, there are several ventilation holes 4-2, and multiple ventilation holes 4-2 are arranged in a straight line on the expansion cover 4-1. The inner bottom of the expansion cover 4-1 is provided with an outlet 5.

[0041] In this embodiment, the discharge port 5 is used for the discharge of particulate dust.

[0042] Furthermore, the locking surface 3-5 and the sliding block 3-6 are parallel to each other, and the locking surface 3-5 and the sliding block 3-6 are spliced ​​together to form an integral structure. The size of the cover 3-1 matches that of the opening 2. The cross-section of the limiting track 3-2 is C-shaped. The opposite sides of the cover 3-1 are located within the limiting track 3-2. A baffle 6 is provided at the upper edge of the ventilation hole 4-2. The baffle 6 is inclinedly placed on the ventilation hole 4-2.

[0043] In this embodiment, the baffle 6 is used to block dust from entering through the ventilation hole 4-2, so that the baffle 6 is positioned to the side of the ventilation hole 4-2 to block dust.

[0044] Furthermore, a groove with the same shape as the sliding groove 3-8 is opened on the locking surface 3-5, and a part of the sliding strip 3-9 is embedded in the groove. An annular sealing gasket 7 is provided at the edge of the opening 2. The annular sealing gasket 7 is located inside the limiting track 3-2. A ventilation filter 8 is provided on the air inlet 4-3. The ventilation filter 8 is embedded inside the well air inlet.

[0045] In this embodiment, the annular sealing gasket 7 is used to seal the cover 3-1, and the ventilation filter mesh 8 is used to filter dust at the air inlet 4-3.

[0046] When the cover 3-1 needs to be closed, the limiting track 3-2 on the opening 2 is used to limit the cover 3-1, so that the cover 3-1 can slide up and down. After the cover 3-1 is pulled down, the opening 2 is closed. At this time, the locking block 3-4 on the elbow frame 3-3 is connected with the sliding block 3-6. At this time, the locking surface 3-5 coincides with the locking block 3-4. After sliding the locking strip 3-7, the upper end of the locking strip 3-7 is pressed against the locking surface 3-5. At this time, the cover 3-1 is locked and positioned. The ventilation hole 4-2 on the expansion cover 4-1 is used for ventilation, and the outlet 5 is used for the discharge of particulate dust.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A heat dissipating neutral point resistance cabinet, characterized in that, include Cabinet (1), the front of which is provided with an opening (2); An opening and closing locking assembly (3) is provided on the cabinet (1); Heat dissipation and ventilation assembly (4), the heat dissipation and ventilation assembly (4) is disposed on the side wall of the cabinet (1); The opening and closing locking assembly (3) includes a cover (3-1), which fits into the opening (2). Limiting rails (3-2) are provided on opposite sides of the opening (2). The cover (3-1) is embedded in the limiting rails (3-2). An elbow bracket (3-3) is provided on the side wall of the cover (3-1). A locking block (3-4) is provided at the end of the elbow bracket (3-3). A locking surface (3-5) is provided on the locking block (3-4). A sliding block (3-6) is provided on the side wall of the cabinet (1). A locking strip (3-7) is provided at the upper end of the sliding block (3-6).

2. The heat dissipation neutral point resistor cabinet according to claim 1, characterized in that, The upper end face of the sliding block (3-6) is provided with a sliding groove (3-8), and the bottom of the locking strip (3-7) is provided with a sliding strip (3-9), which is embedded in the sliding groove (3-8).

3. The heat dissipation neutral point resistor cabinet according to claim 1, characterized in that, The heat dissipation and ventilation assembly (4) includes an expansion cover (4-1), which is disposed on the side wall of the cabinet (1). The side wall of the expansion cover (4-1) is provided with ventilation holes (4-2), and the cabinet (1) is provided with an air inlet (4-3), which is located at the position of the expansion cover (4-1).

4. A heat-dissipating neutral point resistor cabinet according to claim 3, characterized in that, The ventilation holes (4-2) are of several kinds, and the ventilation holes (4-2) are arranged in a straight line on the expansion cover (4-1). The bottom of the expansion cover (4-1) is provided with an outlet (5).

5. A heat-dissipating neutral point resistor cabinet according to claim 1, characterized in that, The locking surface (3-5) and the sliding block (3-6) are parallel to each other, and the locking surface (3-5) and the sliding block (3-6) are spliced ​​together to form an integral structure.

6. A heat-dissipating neutral point resistor cabinet according to claim 1, characterized in that, The size of the cover (3-1) matches that of the opening (2), the cross-section of the limiting track (3-2) is C-shaped, and the opposite sides of the cover (3-1) are located within the limiting track (3-2).

7. A heat-dissipating neutral point resistor cabinet according to claim 3, characterized in that, A baffle (6) is provided at the upper edge of the ventilation hole (4-2), and the baffle (6) is inclinedly placed on the ventilation hole (4-2).

8. A heat-dissipating neutral point resistor cabinet according to claim 2, characterized in that, The locking surface (3-5) has a groove with the same shape as the sliding groove (3-8), and a part of the sliding bar (3-9) is embedded in the groove.

9. A heat-dissipating neutral point resistor cabinet according to claim 1, characterized in that, An annular sealing gasket (7) is provided at the edge of the opening (2), and the annular sealing gasket (7) is located inside the limiting track (3-2).

10. A heat-dissipating neutral point resistor cabinet according to claim 3, characterized in that, A ventilation filter (8) is provided on the air inlet (4-3), and the ventilation filter (8) is embedded inside the air inlet (4-3).

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