Protective sealing structure for connecting rod hole of switch cabinet

Abstract

Provided is a switch cabinet connecting rod hole protection sealing structure. A switch cabinet body is provided with a circuit breaker chamber and a cable chamber. A middle partition plate is arranged between the circuit breaker chamber and the cable chamber; the cable chamber is provided with a grounding switch main shaft which is provided with a crank arm. A turntable is arranged at the front part of the switch cabinet body, a transmission connecting rod is arranged between the turntable and the crank arm, and a hollow long hole for the transmission connecting rod to pass through is formed in the middle partition plate; an outer cover plate is fixedly installed on the middle partition plate, a first folded edge, a second folded edge, a third folded edge and a fourth folded edge are arranged on the left side edge of the outer cover plate, and a first U-shaped notch is formed in the outer cover plate. An inner cover plate is arranged between the outer cover plate and the middle partition plate in an up-down sliding mode, and a fifth folded edge and a sixth folded edge are arranged on the left side edge of the inner cover plate. A second U-shaped notch is formed in the inner cover plate; the transmission connecting rod penetrates through the first U-shaped notch and the second U-shaped notch. The XGN switch cabinet is suitable for refitting the existing XGN switch cabinet, and the transmission connecting rod does not need to be disassembled in the refitting process.

Description

Technical Field

[0001] The utility model belongs to the technical field of power transmission and distribution switch cabinets, and in particular relates to a switch cabinet connecting rod hole protection and sealing structure. Background Art

[0002] In the double isolation scheme of XGN switchgear (box-type fixed high-voltage switchgear), two isolation chambers need to be set up, namely the circuit breaker chamber and the cable chamber. An intermediate partition needs to be set between the circuit breaker chamber and the cable chamber to separate them. The grounding switch is set in the cable chamber, and the transmission connecting rod connected between the front operating panel and the grounding switch arm needs to pass through the intermediate partition between the circuit breaker chamber and the cable chamber. For this purpose, a hollow hole for the transmission connecting rod to pass through needs to be opened in the intermediate partition. On the other hand, during the use of the front operating panel, the rotation of the front operating panel drives the transmission connecting rod to move forward and backward, while driving the transmission connecting rod to move up and down to a large extent. During this process, the posture (i.e., the tilt angle) of the transmission connecting rod will also change. Therefore, the above-mentioned hollow hole must be a long hole, and the length dimension of the long hole is much larger than the outer diameter of the transmission connecting rod. Due to the existence of the long hole, the cable chamber and the circuit breaker chamber do not meet the arc protection requirements, the isolation protection level is low, and it does not meet the requirements of the protection level IP2X, which poses a safety hazard. Specifically, when an arcing accident occurs in one of the two isolation chambers, the high-temperature and high-pressure gas generated by the arcing accident will enter the other isolation chamber through the long hole, and then affect the other isolation chamber.

[0003] In the traditional technology, a leather cover is generally provided to cover the above-mentioned long hole, and the structure of the leather cover is similar to the leather cover at the gear lever of a manual transmission car. However, the leather cover is prone to aging and damage after a period of time, and the leather cover is still at risk of being punctured in the event of an arcing accident. In recent years, with the gradual improvement of the safety performance requirements of electrical systems, most users of XGN switch cabinets produced in the early years need to replace the leather cover, and these users hope to modify the existing XGN switch cabinet with a safer and more reliable transmission connecting rod hole closure structure. The applicant has designed a high-voltage switch cabinet transmission connecting rod hole closure structure and applied for a utility model patent, and the authorization announcement number is CN218549136U, but the high-voltage switch cabinet transmission connecting rod hole closure structure is mainly suitable for newly manufactured switch cabinets. When it is used for the modification of existing XGN switch cabinets, there are the following problems:

[0004] In the process of refitting the existing XGN switch cabinet, the transmission connecting rod needs to be completely removed, and then metal sealing plates with hollow holes are inserted from the front and rear ends of the transmission connecting rod respectively, and then the two ends of the transmission connecting rod are connected and assembled with other components. Since the two ends of the transmission connecting rod have been fixedly connected with other components by rivets, the modification is labor-intensive and time-consuming. Moreover, when an arcing accident occurs in this structure, the high temperature will also reduce or lose the magnetism of the middle partition and the magnet block, resulting in the loss of the shielding function. Utility Model Content

[0005] The utility model aims to overcome the above-mentioned shortcomings and provide a switch cabinet connecting rod hole protective sealing structure, which can ensure the sealing between the circuit breaker chamber and the cable chamber and is suitable for the modification of the existing XGN switch cabinet, and the modification process does not require the removal of the transmission connecting rod.

[0006] Its purpose can be achieved according to the following scheme: a switch cabinet connecting rod hole protective closing structure, including a switch cabinet body, the switch cabinet body is provided with a circuit breaker chamber and a cable chamber; an intermediate partition is arranged between the circuit breaker chamber and the cable chamber; an earthing switch main shaft is arranged in the cable chamber, and the earthing switch main shaft is provided with a crank arm; a turntable is arranged at the front of the switch cabinet body, a transmission connecting rod is arranged between the turntable and the crank arm, the transmission connecting rod passes through the intermediate partition, the intermediate partition is provided with a hollow long hole for the transmission connecting rod to pass through, and the long dimension of the hollow long hole is greater than the outer diameter of the transmission connecting rod; it is characterized in that: an outer cover plate is fixedly installed on the intermediate partition, the left edge of the outer cover plate is provided with a first folded edge, the right edge of the outer cover plate is provided with a second folded edge, the edge of the first folded edge is also connected to a third folded edge, the edge of the second folded edge is also connected to a fourth folded edge, the first folded edge and the second folded edge are perpendicular to the outer cover plate, the third folded edge and the fourth folded edge are parallel to the outer cover plate, and the outer cover plate is provided with a first folded edge. A U-shaped notch, the opening direction of the first U-shaped notch is parallel to the long direction of the hollow long hole of the middle partition, and the width of the first U-shaped notch is equal to the outer diameter of the transmission connecting rod; the third folded edge and the fourth folded edge are closely attached to the middle partition and fixedly connected to the middle partition; an inner cover plate is provided between the outer cover plate and the middle partition so as to be able to slide up and down, the left edge of the inner cover plate is provided with a fifth folded edge, and the right edge of the inner cover plate is provided with a sixth folded edge; the fifth folded edge and the sixth folded edge are perpendicular to the inner cover plate, the fifth folded edge is attached to the first folded edge, and the sixth folded edge is attached to the second folded edge, the width of the fifth folded edge and the width of the sixth folded edge are equal to the distance between the outer cover plate and the middle partition, and the inner cover plate is attached to the middle partition; a second U-shaped notch is provided in the inner cover plate, the opening direction of the second U-shaped notch is horizontal, and the width of the second U-shaped notch is equal to the outer diameter of the transmission connecting rod; the transmission connecting rod passes through the first U-shaped notch and the second U-shaped notch.

[0007] The utility model has the following advantages and effects:

[0008] 1. The direction of the second U-shaped notch is perpendicular to that of the first U-shaped notch. Therefore, when the operating panel in front of the cabinet rotates and drives the transmission connecting rod to move up and down, the transmission connecting rod applies a driving force to the edge of the second U-shaped notch of the inner cover plate, driving the inner cover plate to slide against the middle partition. No matter how the position of the transmission connecting rod changes, the inner cover plate can cover the hollow long hole of the middle partition, thereby ensuring the sealing between the circuit breaker chamber and the cable chamber, thereby preventing an arcing accident in one of the isolation chambers from affecting the other isolation chamber (the circuit breaker chamber and the cable chamber are collectively referred to as isolation chambers).

[0009] 2. The width of the fifth folded edge and the width of the sixth folded edge are equal to the distance between the outer cover plate and the middle partition, which can ensure that the inner cover plate is closely attached to the middle partition; in addition, the fifth folded edge and the sixth folded edge of the inner cover plate can prevent the corner of the inner cover plate from accidentally embedding into the gap between the third (fourth) folded edge and the middle partition to cause jamming. That is to say, although the third (fourth) folded edge and the middle partition can be tightly fixed with bolts, there is still a gap between the corner of the third (fourth) folded edge and the middle partition. If the inner cover plate does not have the fifth folded edge and the sixth folded edge, the corner of the inner cover plate may accidentally embed into the above-mentioned gap during movement to cause jamming. The addition of the fifth (sixth) folded edge can prevent this situation from happening.

[0010] 3. When refitting the existing XGN switch cabinet that has been put into use, if the structure of the utility model is adopted, it is only necessary to use the second U-shaped notch to cover the inner cover plate on the outside of the transmission connecting rod, and then use the first U-shaped notch to cover the outer cover plate on the outside of the transmission connecting rod, so that the inner cover plate and the outer cover plate can be put on without dismantling the transmission connecting rod, and the refitting is quite easy and simple. Of course, the structure of the utility model is also suitable for newly produced XGN switch cabinets. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the utility model.

[0012] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the structure shown.

[0013] Figure 3 yes Figure 1 A is a partial enlarged schematic diagram.

[0014] Figure 4 yes Figure 2 Middle B is a partial enlarged schematic diagram.

[0015] Figure 5 yes Figure 4 Exploded schematic diagram of the structure shown.

[0016] Figure 6 yes Figure 5 An enlarged schematic diagram of the inner cover panel in FIG.

[0017] Figure 7 yes Figure 5 An enlarged schematic diagram of the outer cover plate in FIG. DETAILED DESCRIPTION

[0018] Figure 1 , Figure 2 , Figure 3 , Figure 4 The switch cabinet connecting rod hole protective sealing structure shown includes a high-voltage switch cabinet body, which is provided with a circuit breaker chamber 21 and a cable chamber 22; an intermediate partition 1 is provided between the circuit breaker chamber 21 and the cable chamber 22; an earthing switch main shaft 3 is provided in the cable chamber 22, and the earthing switch main shaft 3 is provided with a crank arm 31; a turntable 32 is provided at the front of the switch cabinet body, and a transmission connecting rod 8 is provided between the turntable 32 and the crank arm 31, and the transmission connecting rod 8 passes through the intermediate partition 1. Figure 3 , Figure 4 , Figure 5 As shown, the middle partition plate 1 is provided with a hollow long hole 10 for the transmission connecting rod 8 to pass through, and the lengthwise dimension of the hollow long hole 10 (i.e. Figure 5 The middle CD size) is larger than the outer diameter of the transmission connecting rod 8; an outer cover plate 4 is fixedly mounted on the middle partition plate 1. Figure 3 , Figure 4 , Figure 7 As shown, the left edge of the outer cover plate 4 is provided with a first folded edge 41, the right edge of the outer cover plate 4 is provided with a second folded edge 42, the edge of the first folded edge 41 is also connected to the third folded edge 43, the edge of the second folded edge 42 is also connected to the fourth folded edge 44, the first folded edge 41 and the second folded edge 42 are perpendicular to the outer cover plate 4, the third folded edge 43 and the fourth folded edge 44 are parallel to the outer cover plate 4, and the outer cover plate is provided with a first U-shaped notch 40, and the opening of the first U-shaped notch 40 is slanted downward (equivalent to Figure 5 The direction of the opening (equivalent to the direction indicated by the arrow b) Figure 5 The direction indicated by the arrow b in the middle) is parallel to the long direction of the hollow long hole 10 of the middle partition (equivalent to Figure 5 In the direction of the CD line), the width of the first U-shaped gap 40 (equivalent to Figure 7 The distance between PQ) is equal to the outer diameter of the transmission connecting rod 8; Figure 3 , Figure 4 As shown, the third folded edge 43 and the fourth folded edge 44 are closely attached to the middle partition plate 1 and are fixedly connected to the middle partition plate 1 by bolts. Figure 4 , Figure 5 , Figure 6As shown, an inner cover plate 5 is provided between the outer cover plate 4 and the middle partition plate 1 so as to be able to slide up and down. A fifth folded edge 55 is provided on the left edge of the inner cover plate 5, and a sixth folded edge 56 is provided on the right edge of the inner cover plate 5. The fifth folded edge 55 and the sixth folded edge 56 are perpendicular to the inner cover plate 5. The fifth folded edge 55 is close to the first folded edge 41, and the sixth folded edge 56 is close to the second folded edge 42. The width of the fifth folded edge 55 (equivalent to Figure 6 EF), the width of the sixth fold 56 (equivalent to Figure 6 The distance between the middle GH is equal to the distance between the outer cover plate 4 and the middle partition plate 1, and the inner cover plate 5 is close to the middle partition plate 1; the inner cover plate 5 is provided with a second U-shaped notch 50, and the opening direction of the second U-shaped notch 50 is (equivalent to Figure 5 The direction indicated by the arrow a in the middle is horizontal, and the width of the second U-shaped notch 50 (equivalent to Figure 6 The distance between the middle MN) is equal to the outer diameter of the transmission connecting rod 8; the transmission connecting rod 8 passes through the first U-shaped gap 40 and the second U-shaped gap 50.

Claims

1. A switch cabinet connecting rod hole protection and closure structure, comprising a switch cabinet body, the switch cabinet body is provided with a circuit breaker chamber and a cable chamber; an intermediate partition is provided between the circuit breaker chamber and the cable chamber; a grounding switch main shaft is provided in the cable chamber, and the grounding switch main shaft is provided with a crank arm; a turntable is provided at the front of the switch cabinet body, a transmission connecting rod is provided between the turntable and the crank arm, the transmission connecting rod passes through the intermediate partition, the intermediate partition is provided with a hollow long hole for the transmission connecting rod to pass through, and the length dimension of the hollow long hole is greater than the outer diameter of the transmission connecting rod; the characteristics are: An outer cover plate is fixedly installed on the middle partition, a first folded edge is provided on the left edge of the outer cover plate, a second folded edge is provided on the right edge of the outer cover plate, the edge of the first folded edge is also connected to a third folded edge, the edge of the second folded edge is also connected to a fourth folded edge, the first folded edge and the second folded edge are perpendicular to the outer cover plate, the third folded edge and the fourth folded edge are parallel to the outer cover plate, a first U-shaped notch is opened on the outer cover plate, the opening direction of the first U-shaped notch is parallel to the long direction of the hollow long hole of the middle partition, and the width of the first U-shaped notch is equal to the outer diameter of the transmission connecting rod; the third folded edge and the fourth folded edge are closely attached to the middle partition and fixedly connected to the middle partition; the outer cover plate and An inner cover plate is provided between the middle partitions so as to be able to slide up and down, a fifth folded edge is provided on the left edge of the inner cover plate, and a sixth folded edge is provided on the right edge of the inner cover plate; the fifth folded edge and the sixth folded edge are perpendicular to the inner cover plate, the fifth folded edge is abutted against the first folded edge, the sixth folded edge is abutted against the second folded edge, the width of the fifth folded edge and the width of the sixth folded edge are equal to the distance between the outer cover plate and the middle partition, and the inner cover plate is abutted against the middle partition; a second U-shaped notch is provided on the inner cover plate, the opening direction of the second U-shaped notch is horizontal, and the width of the second U-shaped notch is equal to the outer diameter of the transmission connecting rod; the transmission connecting rod passes through the first U-shaped notch and the second U-shaped notch.

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