Mounting cross beam of draw-out type low-voltage switch cabinet

Abstract

The utility model discloses an installation crossbeam of a draw-out type low-voltage switch cabinet, which relates to the technical field of low-voltage switch cabinets and comprises a beam body, lower folding lugs are arranged at the front end and the rear end of the beam body and close to the top, upper folding lugs are arranged on the end face of the beam body below the lower folding lugs, and a plurality of groups of bolt holes are reserved in the outer walls of the lower folding lugs and the upper folding lugs. The front end and the rear end of the beam body are provided with bolts which penetrate through the side plate of the switch cabinet and extend into the lower folding lug and the upper folding lug, and a locking assembly used for preventing looseness is welded in the beam body. According to the utility model, the galvanized steel sheet is bent and formed, so that welding and electroplating processes can be omitted, the beam body is low in preparation cost and environment-friendly, meanwhile, the locking assembly is matched, so that the external force born by the beam body can be improved, the quality of the prepared switch cabinet is relatively high, and the purpose of locking the bolts for connecting the side plates and the beam body is achieved; the situation of bolt loosening caused by vibration is prevented, and the connecting position of the side plate and the beam body is tight and firm.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage switchgear technology, specifically to an installation beam for a withdrawable low-voltage switchgear. Background Technology

[0002] Low-voltage withdrawable switchgear is suitable for three-phase AC power generation and supply systems with a frequency of 50Hz, a rated operating voltage of 400V (690V), and a rated current of 4000A and below. It is used for power distribution, centralized control of motors, and capacitor compensation. It is widely used in power plants, petroleum, chemical, metallurgical, textile, and high-rise buildings.

[0003] The main components in the cabinet need to be securely mounted on the fixed mounting plate, and then fixed to the mounting beams of the side columns through the mounting holes on both sides of the mounting plate to ensure the positioning of the components. Normally, the switch cabinet housing beams are made by welding the G beams and beam end caps and then electroplating them. Each housing has four beams. The traditional welding method is not only costly and inefficient, but also not environmentally friendly. Therefore, a mounting beam for withdrawable low-voltage switch cabinets is proposed. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide an installation beam for a withdrawable low-voltage switchgear, so as to solve the technical problems mentioned in the background of low welding efficiency and lack of environmental protection in the preparation of the beam.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mounting beam for a withdrawable low-voltage switchgear, comprising a beam body, with a lower folding lug at the front and rear ends and near the top of the beam body, and an upper folding lug below the lower folding lug located on the end face of the beam body. The outer walls of the lower and upper folding lugs are pre-drilled with multiple sets of bolt holes. The front and rear ends of the beam body are provided with bolts that penetrate the switchgear side plate and extend into the lower and upper folding lugs. A locking component for preventing loosening is welded into the beam body.

[0006] The locking assembly includes two sets of connecting plates fixed to the inner wall of the beam. Each set of the locking assembly has a locking hole corresponding to the lower and upper folding ears on its end face. The outer curved wall of the locking hole has an annular groove extending into the inner lining plate. A collar frame is fixed in the annular groove. Four sets of locking pieces extending into the locking hole are slidably arranged in the collar frame. Each set of locking pieces has a chamfer at its inner corner. A columnar head is fixed at one end of the bolt that extends into the lower and upper folding ears.

[0007] As a preferred technical solution, a connecting plate is welded between the two sets of inner lining plates and near the top, and a connecting strip is fixed between the two sets of inner lining plates near the side wall.

[0008] As a preferred technical solution, the beam is made of galvanized steel sheet directly bent into a G shape.

[0009] As a preferred technical solution, the inner lining plate is provided with a handle ring on the side away from the bolt, and the rear surface of the collar frame is reserved with four sets of straight grooves. Each set of straight grooves is provided with an active column, and the two ends of the active column are fixed to the locking plate and the handle ring respectively.

[0010] As a preferred technical solution, the outer curved wall of each locking piece is provided with two sets of blind holes, and a spring is fixed in each set of blind holes. The end of the spring is fixed with a guide rod to the inner wall of the collar frame.

[0011] As a preferred technical solution, the four sets of locking pieces are arc-shaped in appearance, and the four sets of locking pieces form a telescopic locking ring within the locking hole.

[0012] As a preferred technical solution, the outer diameter of the cylindrical cone head is smaller than the bolt holes reserved on the outer walls of the lower and upper folding ears.

[0013] In summary, the present invention has the following main advantages:

[0014] This utility model utilizes galvanized steel sheet bending to form the beam, eliminating the need for welding and electroplating processes, resulting in low manufacturing costs and environmental friendliness. Simultaneously, the locking components enhance the beam's ability to withstand external forces, ensuring high-quality switchgear. Furthermore, the locking mechanism secures the bolts connecting the side plates and the beam, preventing loosening due to vibration and ensuring a tight and secure connection between the side plates and the beam. Attached Figure Description

[0015] Figure 1 This is a first-view structural diagram of the present invention;

[0016] Figure 2 This is a second-view structural diagram of the present invention;

[0017] Figure 3 This is a three-dimensional structural diagram of the locking component of this utility model;

[0018] Figure 4 This is a side view of the inner lining plate of this utility model;

[0019] Figure 5 For the present utility model Figure 4 Enlarged view of point A in the middle;

[0020] Figure 6 This is a plan view of the locking piece and inner lining plate of this utility model;

[0021] Figure 7 This is a planar structural diagram of the bolt of this utility model.

[0022] In the diagram: 100, beam; 200, locking assembly; 300, bolt; 310, column cone head;

[0023] 110. Downward folded ear; 120. Upward folded ear;

[0024] 210. Inner liner plate; 211. Ring groove; 220. Connecting plate; 230. Connecting strip; 240. Handle ring; 250. Locking hole; 260. Locking piece; 261. Driving post; 270. Collar frame; 271. Straight groove; 280. Guide rod; 281. Spring. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] The embodiments of this utility model will be described below based on its overall structure.

[0027] A type of installation beam for withdrawable low-voltage switchgear, such as Figures 1 to 7 As shown, the beam includes a beam body 100. The beam body 100 has a lower folding lug 110 at the front and rear ends and near the top. The lower folding lug 110 is located below the end face of the beam body 100 and an upper folding lug 120. The outer walls of the lower folding lug 110 and the upper folding lug 120 are reserved with multiple sets of bolt holes. The front and rear ends of the beam body 100 are provided with bolts 300 that penetrate the switch cabinet side plate and extend into the lower folding lug 110 and the upper folding lug 120. A locking component 200 for preventing loosening is welded inside the beam body 100.

[0028] The locking assembly 200 includes two sets of connecting plates 220 fixed to the inner wall of the beam 100. Each set of locking assemblies 200 has a locking hole 250 corresponding to the lower folding lug 110 and the upper folding lug 120 on its end face. The outer curved wall of the locking hole 250 has an annular groove 211 extending into the inner lining plate 210. A collar frame 270 is fixed in the annular groove 211. Four sets of locking pieces 260 extending into the locking hole 250 are slidably arranged in the collar frame 270. Each set of locking pieces 260 has a chamfer at the inner corner. A column cone head 310 is fixed at one end of the bolt 300 that extends into the lower folding lug 110 and the upper folding lug 120.

[0029] A handle ring 240 is rotatably provided on the side of the inner lining plate 210 away from the bolt 300. Four sets of straight grooves 271 are reserved on the rear surface of the collar frame 270. An active post 261 is slidably provided in each set of straight grooves 271. The two ends of the active post 261 are fixed to the locking piece 260 and the handle ring 240 respectively. Two sets of blind holes are reserved on the curved outer wall of each set of locking pieces 260. A spring 281 is fixed in each set of blind holes. A guide rod 280 is fixed to the end of the spring 281 and the inner wall of the collar frame 270.

[0030] The four sets of locking plates 260 are arc-shaped, and the four sets of locking plates 260 form a telescopic locking ring within the locking hole 250.

[0031] The beam 100 is bent into a G shape by the equipment, which can save the manufacturing cost of the beam 100, eliminate the electroplating process and achieve the purpose of environmental protection. When positioning the side plate, the bolt 300 is rotated and passes through the bolt holes opened in the side plate, the upper folding ear 120 and the lower folding ear 110 until the bolt 300 can no longer be tightened. In this way, the docking work between the side plate and the beam 100 is completed.

[0032] When the end of bolt 300 passes through the upper folding lug 120 and the lower folding lug 110, the cone head 310 at its end will squeeze the four sets of locking pieces 260 outward. The locking pieces 260 will move along the axis of the guide rod 280 and compress the spring 281 until the cone head 310 has completely passed through. Under the condition that the spring 281 releases pressure, the four sets of locking pieces 260 will converge in the opposite direction, which will have a locking effect on the cone head 310. This can prevent the bolt 300 from loosening due to the vibration generated when the internal components of the cabinet are working, making the connection between the side plate and the beam 100 more secure. When disassembling later, the handle ring 240 can be rotated from the inside of the side plate, and the guide rod 280 will slide along the straight groove 271, causing the four sets of locking pieces 260 to expand outward and release the lock on the cone head 310. At this time, the bolt 300 can be rotated to loosen it until the side plate is disassembled.

[0033] Please refer to this carefully. Figure 2 and Figure 3 A connecting plate 220 is welded between the two sets of inner lining plates 210 and near the top, and a connecting strip 230 is fixed between the two sets of inner lining plates 210 near the side wall.

[0034] The inner lining plate 210, connecting strip 230 and connecting plate 220 form a frame-like reinforcing rib in the beam 100 to improve the strength of the beam 100.

[0035] Please refer to this carefully. Figure 1 and Figure 2 The beam 100 is made of galvanized steel sheet directly bent into a G shape.

[0036] Using a bending machine to bend the galvanized sheet into the beam 100 eliminates the need for welding and electroplating processes, making the preparation cost of the beam 100 low and environmentally friendly.

[0037] Please refer to this carefully. Figure 1 The outer diameter of the column cone head 310 is smaller than the bolt holes reserved on the outer walls of the lower folding ear 110 and the upper folding ear 120, and the outer diameter of the column cone head 310 is smaller than the bolt holes reserved on the side panel of the cabinet.

[0038] It allows the cone head 310 to easily penetrate the side plate, the lower folding ear 110 and the upper folding ear 120, until it enters the locking hole 250 reserved in the inner lining plate 210, thus achieving the final locking effect.

[0039] When in use, the beam 100 is bent into a G shape by the equipment, which can save the manufacturing cost of the beam 100, eliminate the electroplating process and achieve the purpose of environmental protection. When positioning the side plate, the bolt 300 is rotated and passes through the bolt holes opened in the side plate, the upper folding ear 120 and the lower folding ear 110 until the bolt 300 can no longer be tightened. In this way, the docking work between the side plate and the beam 100 is completed.

[0040] When the end of bolt 300 passes through the upper folding lug 120 and the lower folding lug 110, the cone head 310 at its end will squeeze the four sets of locking pieces 260 outward. The locking pieces 260 will move along the axis of the guide rod 280 and compress the spring 281 until the cone head 310 has completely passed through. Under the condition that the spring 281 releases pressure, the four sets of locking pieces 260 will converge in the opposite direction, which will have a locking effect on the cone head 310. This can prevent the bolt 300 from loosening due to the vibration generated when the internal components of the cabinet are working, making the connection between the side plate and the beam 100 more secure. When disassembling later, the handle ring 240 can be rotated from the inside of the side plate, and the guide rod 280 will slide along the straight groove 271, causing the four sets of locking pieces 260 to expand outward and release the lock on the cone head 310. At this time, the bolt 300 can be rotated to loosen it until the side plate is disassembled.

[0041] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A mounting crossbar of an extracted low voltage switchgear cabinet comprising a beam body (100), characterized in that: The front and rear ends of the beam body (100) are provided with lower folded ears (110) near the top position, the lower side of the lower folded ear (110) is provided with an upper folded ear (120) on the end face of the beam body (100), the outer wall of the lower folded ear (110) and the upper folded ear (120) is reserved for a plurality of bolt holes, the front and rear ends of the beam body (100) are provided with bolts (300) extending through the side plate of the switch cabinet and extending into the lower folded ear (110) and the upper folded ear (120), and the beam body (100) is welded with a locking assembly (200) for preventing loosening; The locking assembly (200) includes two groups of connecting plates (220) fixed to the inner wall of the beam body (100), the end face of each group of the locking assembly (200) is reserved for a locking hole (250) corresponding to the lower folded ear (110) and the upper folded ear (120), the curved outer wall of the locking hole (250) is provided with a ring groove (211) extending into the inner lining plate (210), the ring groove (211) is fixed with a collar frame (270), the collar frame (270) is slidably provided with four groups of locking pieces (260) extending into the locking hole (250), the inner corner position of each group of the locking piece (260) is provided with a chamfer, and one end of the bolt (300) extending into the lower folded ear (110) and the upper folded ear (120) is fixed with a column taper head (310).

2. The mounting crossbar of the draw-out low voltage switchgear cabinet according to claim 1, characterized in that: Two groups of the inner lining plates (210) are welded with a connecting plate (220) between them and near the top position, and two groups of the inner lining plates (210) are fixed with a connecting strip (230) between them and near the side wall position.

3. The mounting beam of the draw-out low voltage switchgear cabinet according to claim 1, characterized in that: The beam body (100) is directly bent into a G shape by using a galvanized steel plate.

4. The mounting beam of the draw-out low voltage switchgear cabinet according to claim 1, characterized in that: The side of the inner lining plate (210) away from the bolt (300) is rotatably provided with a handle ring (240), the rear surface of the collar frame (270) is reserved for four groups of straight grooves (271), each group of the straight groove (271) is slidably provided with a driving column (261), and the two ends of the driving column (261) are fixed with the locking piece (260) and the handle ring (240), respectively.

5. The mounting beam of the draw-out low voltage switchgear cabinet according to claim 1, characterized in that: The curved outer wall of each group of the locking piece (260) is reserved for two groups of blind holes, each group of the blind hole is fixed with a spring (281), and the end of the spring (281) is fixed with a guide rod (280) on the inner wall of the collar frame (270).

6. The mounting beam of the draw-out low voltage switchgear cabinet according to claim 1, characterized in that: The four groups of the locking piece (260) are arc-shaped in appearance, and the four groups of the locking piece (260) form a telescopic locking ring in the locking hole (250).

7. The mounting beam of the draw-out low voltage switchgear cabinet according to claim 1, characterized in that: The outer wall diameter of the column taper head (310) is smaller than the bolt hole reserved on the outer wall of the lower folded ear (110) and the upper folded ear (120).

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