Handcart auxiliary electric interlocking

Abstract

This utility model discloses an auxiliary electrical interlock for a handcart, including an operating panel disposed at one end of a grounding operating rod. The end of the grounding operating rod has a connection hole for connecting to an operating handle. The operating panel moves relative to the grounding operating rod within a set range, forming a locked or unlocked position to block or open the connection hole. A micro switch for a propulsion mechanism is disposed on one side of the operating panel. In the locked and unlocked positions of the operating panel, the micro switch for the propulsion mechanism is triggered to open and disconnected to close, respectively. This utility model uses an operating panel, operating rod, and micro switch for the propulsion mechanism to form an interlocking structure. The locking and unlocking actions of the operating panel and operating rod in relation to the manual operation of the operating handle are linked to the micro switch for the propulsion mechanism, ensuring that the electric propulsion mechanism cannot operate when the operating handle is not removed or the manual operation state of the operating rod is open, thus ensuring the electrical safety requirements are met.

Description

Technical Field

[0001] This utility model belongs to the technical field of switchgear equipment and relates to a handcart auxiliary electrical interlock. Background Technology

[0002] According to the five electrical protection requirements for switchgear, when the handcart inside the switchgear is in the working position, it is strictly forbidden to close the grounding switch, and when the grounding switch is closed, it is strictly forbidden to move the handcart into the working position.

[0003] Currently, emerging switchgear equipment adds an electric propulsion mechanism to the manual propulsion mechanism for the operation of the handcart. However, the traditional interlocking mechanism is only compatible with the manual propulsion mechanism and cannot provide electrical protection for the newly added electric propulsion mechanism. This means that if the operator makes an operational error and fails to pull out the grounding switch operating handle in time, the electric propulsion mechanism can work to push the handcart into the working position, thereby violating the electrical protection requirements and causing operational hazards. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides an auxiliary electrical interlock for handcarts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A handcart auxiliary electrical interlock includes an operating panel disposed at one end of a grounding operating rod. The end of the grounding operating rod has a connection hole for connecting to an operating handle. The operating panel moves relative to the grounding operating rod within a set range to form a locked position or an unlocked position for blocking or opening the connection hole. A micro switch for a propulsion mechanism is disposed on one side of the operating panel. In the locked and unlocked positions of the operating panel, the micro switch for the propulsion mechanism is triggered to open and disconnected to close, respectively.

[0007] Furthermore, the control panel has a through-hole for the operation handle to pass through. In the locked and unlocked positions of the control panel, the through-hole and the connection hole are respectively offset and aligned.

[0008] Furthermore, one end of the control panel is provided with an interlocking handle for driving the control panel to move.

[0009] Furthermore, one end of the control panel is provided with a top plate for abutting against the micro switch of the propulsion mechanism.

[0010] Furthermore, it also includes a grounding interlock micro switch, which is disposed on one side of the micro switch of the propulsion mechanism. When the operation panel is in the locked and unlocked positions, the grounding interlock micro switch is triggered to open and disconnected to close, respectively.

[0011] In summary, the advantages of this utility model are as follows:

[0012] This utility model adopts an interlocking structure formed by the control panel, the control lever, and the micro switch of the propulsion mechanism. The locking and unlocking actions of the control panel and the control lever for manual operation of the control handle are linked to the micro switch of the propulsion mechanism, so that the electric propulsion mechanism cannot work when the control handle is not pulled out or the manual operation state of the control lever is open, thus ensuring the five electrical protection requirements. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the control panel in the unlocked position of this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the operating panel of this utility model in the locked position.

[0015] The diagram shows: 1. Operating lever; 11. Operating panel; 12. Socket; 21. Interlock handle; 2. Top plate; 23. Micro switch for propulsion mechanism; 24. Grounding interlock micro switch. Detailed Implementation

[0016] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0017] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0018] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0019] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0020] This utility model provides an auxiliary electrical interlock for circuit breaker trolleys, which is installed inside the switchgear equipment to interlock the propulsion mechanism of the circuit breaker trolley with the grounding switch. The on / off operation state of the propulsion mechanism is switched according to the open / closed state of the grounding switch to achieve the five electrical protection requirements.

[0021] The interlocking structure is set on one side of the grounding switch device. The grounding switch device includes a grounding operating rod 1, a grounding switch and an operating panel 11. The grounding switch is set at one end of the grounding operating rod 1. The other end of the grounding operating rod 1 is provided with a connection hole for inserting and engaging the operating handle. The operating handle can drive the rotation of the grounding operating rod 1, thereby driving the rotation of the grounding switch to realize the closing and opening of the grounding switch.

[0022] The operating panel 11 is located at the other end of the grounding operating rod 1 near the connection hole. The operating panel 11 can move within a set range to switch between the unlocked and locked positions. A through hole 12 is provided in the middle of the operating panel 11. In the unlocked position, the through hole 12 is directly opposite the connection hole, allowing the operating handle to pass through the through hole 12 and connect to the connection hole. In this state, the grounding switch can be manually closed or opened using the operating handle. In the locked position, the through hole 12 is offset from the connection hole, causing the operating panel 11 to block the connection hole. The operating handle cannot be inserted into the connection hole, and the grounding switch cannot be manually closed or opened in this state.

[0023] The interlocking structure includes an interlocking handle 21, a top plate 2, a grounding interlocking micro switch 24, and a propulsion mechanism micro switch 23. The interlocking handle 21 is located at one end of the operating panel 11 and is used to drive the operating panel 11 to switch between the unlocked and locked positions. The top plate 2 is connected to the other end of the operating panel 11. The movement of the operating panel 11 synchronously drives the movement of the top plate 2. The grounding interlocking micro switch 24 and the propulsion mechanism micro switch 23 are both located in the movement stroke of the top plate 2. When the operating panel 11 moves to the locked position, the top plate 2 simultaneously contacts and triggers the grounding interlocking micro switch 24 and the propulsion mechanism micro switch 23. The grounding interlocking micro switch 24 is used to control the on / off of the electric operating mechanism of the grounding switch in the switch cabinet, and the propulsion mechanism micro switch 23 is used to control the on / off of the electric propulsion mechanism of the handcart in the switch cabinet.

[0024] When the control panel 11 is in the unlocked position, such as Figure 1 The top plate 2 is not in contact with the two microswitches, so that the two microswitches are in the normally closed state. At this time, the grounding switch can be manually operated to close or open; the electric operating mechanism circuit of the grounding switch is open, so the grounding switch cannot be electrically operated to close or open; the electric propulsion mechanism circuit of the handcart is open, so the handcart cannot be driven to propel.

[0025] When the control panel 11 is in the locked position, such as Figure 2The top plate 2 contacts two microswitches, putting them in the normally open state. At this time, the grounding switch cannot be manually operated to close or open. The electric operating mechanism circuit of the grounding switch is on, allowing the grounding switch to be electrically operated to close or open. When the grounding switch is open, the electric propulsion mechanism circuit of the handcart is on, allowing the handcart to be electrically driven to move between the test position and the working position. When the grounding switch is closed, the electric propulsion circuit of the handcart is disconnected, preventing the handcart from being electrically driven to move.

[0026] 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 embodiments of this utility model without inventive effort should fall within the scope of protection of this utility model.

Claims

1. A handcart auxiliary electrical interlock, characterized in that, The device includes an operating disk (11) for use at one end of a grounding operating rod (1). The end of the grounding operating rod (1) is provided with a connection hole for connecting to an operating handle. The operating disk (11) moves relative to the grounding operating rod (1) within a set range to form a locked position or an unlocked position for blocking or opening the connection hole. A micro switch (23) for a propulsion mechanism is provided on one side of the operating disk (11). In the locked position and the unlocked position of the operating disk (11), the micro switch (23) for the propulsion mechanism is triggered to open and disconnected to close, respectively.

2. The auxiliary electrical interlock for a handcart according to claim 1, characterized in that, The operation panel (11) has a through hole (12) for the operation handle to pass through. In the locked and unlocked positions of the operation panel (11), the through hole (12) and the connection hole are respectively offset and directly opposite.

3. The auxiliary electrical interlock for a handcart according to claim 1, characterized in that, One end of the operation panel (11) is provided with an interlocking handle (21) for driving the operation panel (11) to move.

4. The auxiliary electrical interlock for a handcart according to claim 1, characterized in that, One end of the operation panel (11) is provided with a top plate (2) for abutting against the micro switch (23) of the propulsion mechanism.

5. The auxiliary electrical interlock for a handcart according to claim 1, characterized in that, It also includes a grounding interlock micro switch (24), which is located on one side of the propulsion mechanism micro switch (23). When the operation panel (11) is in the locked position and the unlocked position, the grounding interlock micro switch (24) is triggered to open and disconnected to close, respectively.

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