Drawer unit capable of accurately indicating tripping position

Abstract

The utility model discloses a drawer unit capable of accurately indicating a tripping position, which comprises a drawer, a propulsion mechanism, a torsion spring, a circuit breaker, a connecting rod and a circuit breaker operating handle, the circuit breaker operating handle is arranged on a door plate of the drawer, the propulsion mechanism, the torsion spring, the circuit breaker and the connecting rod are all positioned in the drawer, the propulsion mechanism is provided with a turntable, and the turntable is provided with a handle. One end of the connecting rod is connected with an operating handle of the circuit breaker, the other end of the connecting rod penetrates through a rotating disc of the propelling mechanism to be connected with an operating mechanism in the circuit breaker, one end of the torsional spring is connected to the connecting rod, and the other end of the torsional spring is fixed so that the torsional spring can rotate along with the connecting rod to store force when the circuit breaker is switched on; the torsion spring releases elastic force to drive the connecting rod to rotate reversely so that the circuit breaker operating handle can indicate the tripping position. According to the utility model, the operation handle on the drawer door plate can accurately indicate the tripping position, which is convenient for on-site operation and maintenance personnel to find and carry out maintenance, thereby eliminating potential safety hazards.

Description

Technical Field

[0001] The utility model is a component of low-voltage complete switchgear in the power industry, and particularly relates to a drawer unit capable of accurately indicating the tripping position. Background Art

[0002] Low-voltage complete switchgear is a control device applied in fields such as industry, the tertiary industry, and infrastructure construction. It is often used in industries such as high-rise buildings, factory power supply, data centers, and lithium smelting for control and protection during power transmission, distribution, and power conversion. Among them, drawer-type complete switchgear is the most widely used, and it centrally distributes electric energy to downstream loads.

[0003] The drawer unit is the most important component of the drawer switch cabinet, and it undertakes the function of distributing electric energy to each branch circuit. During the operation of the equipment, when faults such as short circuit, overload, and motor blockage occur on the load side, the circuit breaker protection trips abnormally, and the circuit breaker handle set on the panel needs to rotate back to the tripping position for on-site operation and maintenance personnel to observe and discover. However, due to the frictional resistance inside the interlocking mechanism of the propulsion mechanism, the circuit breaker handle often fails to rotate back in place or does not move, resulting in inaccurate indication of the tripping position and potential safety hazards. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a drawer unit capable of accurately indicating the tripping position, which has a simple structure, low cost, can accurately indicate the tripping position for on-site operation and maintenance personnel to discover and repair, and eliminate potential safety hazards.

[0005] The purpose of the utility model is achieved by the following technical measures: a drawer unit capable of accurately indicating the tripping position, characterized in that it includes a drawer, a propulsion mechanism, a torsion spring, a circuit breaker, a connecting rod, and a circuit breaker operating handle. The circuit breaker operating handle is installed on the door panel of the drawer. The propulsion mechanism, torsion spring, circuit breaker, and connecting rod are all located inside the drawer. The propulsion mechanism has a turntable. One end of the connecting rod is connected to the circuit breaker operating handle, and the other end passes through the turntable of the propulsion mechanism and is connected to the operating mechanism inside the circuit breaker. One end of the torsion spring is connected to the connecting rod, and the other end is fixed so that the torsion spring can store energy by rotating with the connecting rod when the circuit breaker is closed, and when the circuit breaker trips and releases the latch, the torsion spring releases its elastic force to drive the connecting rod to rotate in the reverse direction so that the circuit breaker operating handle indicates the tripping position.

[0006] The utility model can realize the normal opening and closing of the circuit breaker when the drawer unit is in the connected position. When the circuit breaker is closed, the torsion spring accumulates elastic force. When the circuit breaker trips and releases the latch, the torsion spring releases the elastic force to drive the connecting rod to rotate, thereby overcoming the frictional impedance caused by assembly errors, part errors, etc. in the interlocking mechanism of the propulsion mechanism, enabling the operating handle on the drawer door panel to accurately indicate the trip position, facilitating on-site operation and maintenance personnel to discover and perform repairs, and thus eliminating potential safety hazards.

[0007] The connecting rod of the utility model is a prism, the central hole of the turntable is a polygonal hole adapted thereto, and the connecting rod passes through the central hole of the turntable.

[0008] The torsion spring of the utility model consists of a winding part and a rod part. The winding part is sleeved and fixed on the connecting rod and is close to the turntable, and the free end of the rod part is fixed on the clamping plate of the propulsion mechanism.

[0009] The winding part of the torsion spring of the utility model is formed by connecting a polygonal winding structure adapted to the connecting rod and a circular winding structure, and the rod part extends from the tail end of the circular winding structure.

[0010] Compared with the prior art, the utility model has the following remarkable effects:

[0011] ⑴ The utility model can realize the normal opening and closing of the circuit breaker when the drawer unit is in the connected position. When the circuit breaker is closed, the torsion spring accumulates elastic force. When the circuit breaker trips and releases the latch, the torsion spring releases the elastic force to drive the connecting rod to rotate, thereby overcoming the frictional impedance caused by assembly errors, part errors, etc. in the interlocking mechanism of the propulsion mechanism, enabling the operating handle on the drawer door panel to accurately indicate the trip position, facilitating on-site operation and maintenance personnel to discover and perform repairs, and thus eliminating potential safety hazards.

[0012] ⑵ The utility model adds a torsion spring to the original drawer unit, which is easy to manufacture and install, realizes stable and reliable functions, and the torsion spring is convenient to install and maintain in the drawer.

[0013] ⑶ The utility model has a simple structure, low cost, strong practicability, and is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further describes the utility model in detail with reference to the drawings and specific embodiments.

[0015] Figure 1 is one of the three-dimensional structure diagrams of the utility model (showing the drawer);

[0016] Figure 2 is the second three-dimensional structure diagram of the utility model (removing the drawer);

[0017] Figure 3It is a three-dimensional structural schematic diagram of a torsion spring.

[0018] In the figure: 1 - door panel, 2 - propulsion mechanism, 3 - bottom plate, 4 - torsion spring, 5 - side plate, 6 - circuit breaker, 7 - connecting rod, 8 - circuit breaker operating handle, 9 - turntable, 10 - clamping plate, 11 - fixing plate, 12 - rear plate, 13 - square winding structure, 14 - circular winding structure, 15 - rod part. Specific embodiments

[0019] As Figure 1 and Figure 2 shown, it is a drawer unit of the present utility model that can accurately indicate the tripping position, including a drawer, a propulsion mechanism 2, a torsion spring 4, a circuit breaker 6, a connecting rod 7 and a circuit breaker operating handle 8. The drawer is composed of a bottom plate 3, a door panel 1 provided on the front side of the bottom plate 3, two side plates 5 respectively provided on both sides of the bottom plate 3, and a rear plate 12 provided on the rear side of the bottom plate 3. The circuit breaker operating handle 8 is installed on the door panel 1 of the drawer. The propulsion mechanism 2, the torsion spring 4, the circuit breaker 6 and the connecting rod 7 are all located inside the drawer. The propulsion mechanism 2 has a turntable 9. One end of the connecting rod 7 is connected to the circuit breaker operating handle 8, and the other end passes through the turntable 9 of the propulsion mechanism 2 and is connected to the operating mechanism inside the circuit breaker 6. The cross-section of the connecting rod 7 is rectangular, and the central hole of the turntable 9 is a rectangular hole. The connecting rod 7 passes through the central hole of the turntable 9 of the propulsion mechanism 2.

[0020] The torsion spring 4 is composed of a winding part and a rod part 15. The winding part is sleeved and fixed on the connecting rod 7 and is close to the turntable 9. The free end of the rod part is clamped on the clamping plate 10 of the propulsion mechanism 2. The winding part of the torsion spring 4 is connected by a square winding structure 13 adapted to the connecting rod 7 and a circular winding structure 14. The number of turns and the spring diameter are calculated. The rod part 15 extends from the tail end of the circular winding structure 14. The square winding structure 13 enables the torsion spring 4 to be better fixed on the connecting rod 7, and the circular winding structure 14 enables the winding part of the torsion spring 4 to be conveniently sleeved on the connecting rod 7.

[0021] The torsion spring 4 of the present utility model can store energy by rotating with the connecting rod 7 when the circuit breaker 6 is closed, and when the circuit breaker 6 trips and releases the trip, the torsion spring 4 releases elastic force to drive the connecting rod 7 to rotate in the reverse direction so that the circuit breaker operating handle 8 accurately indicates the trip position.

[0022] When the drawer unit is in the connected position, the circuit breaker operating handle 8 is rotated clockwise manually, driving the connecting rod 7 to rotate, and the interlock assembly of the propulsion mechanism 2 also rotates. The operating mechanism inside the circuit breaker 6 converts the rotation into a leftward closing movement, thus realizing the closing operation. Conversely, it is the opening operation. When the circuit breaker has an abnormal trip and release, due to the frictional impedance of the interlock mechanism on the propulsion mechanism 2 due to assembly errors, part errors, etc., the elastic force of the operating mechanism inside the circuit breaker 6 is not sufficient to overcome this impedance, and it cannot accurately indicate the trip position.

[0023] The propulsion mechanism 2 of the present utility model is a hand-pulled type, which is a prior art. In order to achieve the mechanical interlock relationship of the drawer, there are a cam, a clamping plate 10 and a turntable 9 on the upper side of the propulsion mechanism 2. After these three parts are fastened with screws, they are snapped into the fixing plate 11 of the propulsion mechanism 2 and can rotate. However, there is still some frictional force between this whole and the fixing plate 11. Especially due to reasons such as assembly errors and part errors, there may be some deviations in the coaxiality of the connecting rod at three fulcrums. At this time, the frictional force will be greater.

[0024] The present utility model adds a torsion spring 4 to the existing drawer unit. Using the elastic force of the torsion spring 4, when the switch is closed, the torsion spring 4 accumulates elastic force. When the circuit breaker trips and releases the latch, the torsion spring 4 releases the elastic force, driving the connecting rod 7 to rotate, thereby overcoming the impedance of the frictional force. The rotation of the connecting rod 7 drives the operating handle 8 of the circuit breaker to rotate to a proper tripping position, thereby indicating the correct tripping state and facilitating the on-site operation and maintenance personnel to discover and perform repairs.

[0025] The implementation manners of the present utility model are not limited thereto. According to the above content of the present utility model, in accordance with the ordinary technical knowledge and customary means in the art, without departing from the above basic technical idea of the present utility model, the present utility model can also be modified, replaced or changed in many other forms, all of which fall within the scope of the protection of the rights of the present utility model.

Claims

1. A drawer unit capable of accurately indicating the tripping position, characterized in that: It includes a drawer, a pushing mechanism, a torsion spring, a circuit breaker, a connecting rod and a circuit breaker operating handle. The circuit breaker operating handle is installed on the door panel of the drawer. The pushing mechanism, the torsion spring, the circuit breaker and the connecting rod are all located inside the drawer. The pushing mechanism has a turntable. One end of the connecting rod is connected to the circuit breaker operating handle, and the other end passes through the turntable of the pushing mechanism and is connected to the operating mechanism inside the circuit breaker. One end of the torsion spring is connected to the connecting rod, and the other end is fixed so that the torsion spring can store energy by rotating with the connecting rod when the circuit breaker is closed, and when the circuit breaker trips and releases the latch, the torsion spring releases the elastic force and drives the connecting rod to rotate in the reverse direction so that the circuit breaker operating handle indicates the tripped position.

2. The drawer unit capable of accurately indicating the tripping position according to claim 1, characterized in that: The connecting rod is a prism, and the central hole of the turntable is a polygonal hole adapted to it. The connecting rod passes through the central hole of the turntable.

3. The drawer unit capable of accurately indicating the tripping position according to claim 2, characterized in that: The torsion spring is composed of a winding part and a rod part. The winding part is sleeved and fixed on the connecting rod and is close to the turntable, and the free end of the rod part is fixed on the clamping plate of the pushing mechanism.

4. The drawer unit capable of accurately indicating the tripping position according to claim 3, wherein: The winding part of the torsion spring is formed by connecting a polygonal winding structure adapted to the connecting rod and a circular winding structure, and the rod part extends from the tail end of the circular winding structure.

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