Simple secondary interlock

Abstract

The utility model discloses a simple secondary interlock, which comprises an interlock mechanism and an adjustable connecting rod, the interlock mechanism comprises a stop lever used for locking an aviation plug, one end of the adjustable connecting rod is hinged with the stop lever to drive the stop lever to swing, and the other end of the adjustable connecting rod is provided with an abutting part used for abutting against a handcart. According to the utility model, the transmission combination of the adjustable connecting rod and the interlocking mechanism is adopted, the shaking-in and shaking-out actions of the handcart are efficiently transmitted to the interlocking mechanism, the interlocking of the aviation plug is realized, the structure is simple and effective, the telescopic adjustment of the adjustable connecting rod is matched with the fine adjustment of the fine adjustment screw, the application of different types of handcarts can be realized, and the practicability is high. And various errors caused by cooperation of the handcart and the switch cabinet can be rapidly adjusted, and effective interlocking of the aviation plug can be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch cabinets and relates to a simple secondary interlock. Background Art

[0002] High-voltage switchgear is a common type of power distribution switchgear. Currently, most high-voltage switchgear is armored and removable. The secondary components on the trolley are connected to the cabinet via aviation plugs. This means the plugs must be fixed to the cabinet and cannot be removed when in the working position. Otherwise, many functions on the trolley will fail, or even worse, damage it, endangering the safety of operators and other working components in the high-voltage switchgear. Therefore, the interlocking device between the aviation plug and the trolley of the high-voltage switchgear is particularly important.

[0003] Chinese patents CN201682197U and CN107181193A both disclose similar interlocking devices for an air plug and a trolley, in which the movement of the trolley drives a rocker arm to restrict the handle of the air plug. However, the above patents do not take into account the depth position error of the trolley in the working position caused by component errors and assembly errors between the trolley and the switch cabinet. These errors will make it impossible for the rocker arm to completely restrict the handle of the air plug, resulting in interlock failure. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a simple secondary interlock.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A simple secondary interlock includes an interlocking mechanism and an adjustable connecting rod. The interlocking mechanism includes a blocking rod for locking an aviation plug. One end of the adjustable connecting rod is hinged to the blocking rod to drive the blocking rod to swing. The other end of the adjustable connecting rod is provided with an abutting portion for abutting against a trolley.

[0007] Furthermore, the abutting portion is provided with a fine-tuning screw, and the fine-tuning screw is threadedly connected to the abutting portion along the movement direction of the trolley.

[0008] Furthermore, the adjustable connecting rod includes a first rod and a second rod, the first rod and the second rod are partially stacked along the straight direction of the adjustable connecting rod, and the first rod and the second rod are both provided with a plurality of connection holes for passing bolts.

[0009] Furthermore, the interlocking mechanism also includes a fixed bracket and a transmission rod, the transmission rod is rotatably connected to the fixed bracket through a rotating shaft, the blocking rod is connected to one end of the transmission rod, and the adjustable connecting rod is hinged to the other end of the transmission rod.

[0010] Furthermore, a return spring is included, and both ends of the return spring are respectively connected to the transmission rod and the fixed bracket.

[0011] In summary, the benefits of the present invention are:

[0012] The utility model adopts a transmission combination of an adjustable connecting rod and an interlocking mechanism, which efficiently transmits the rocking-in and rocking-out action of the trolley to the interlocking mechanism, thereby realizing the interlocking of the aviation plug. The structure is simple and effective, and the telescopic adjustment of the adjustable connecting rod is combined with the fine adjustment of the fine-tuning screw to realize the applicability of trolleys of different models and the rapid adjustment of various errors in the coordination between the trolley and the switch cabinet, thereby ensuring the effective interlocking of the aviation plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the secondary interlocking of the utility model.

[0014] Figure 2 This is a schematic diagram of the structure in the unlocked position.

[0015] Figure 3 Schematic diagram of the structure in the locked position.

[0016] Markings in the figure: 11, fixed bracket; 12, transmission rod; 13, gear lever; 2, adjustable connecting rod; 21, first rod; 22, second rod; 23, fine-tuning screw; 3, protective baffle; 4, aviation plug; 41, action handle. DETAILED DESCRIPTION

[0017] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within these embodiments may be combined with one another, unless they conflict.

[0018] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed arbitrarily, and the component layout type may also be more complicated.

[0019] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0020] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the perpendicular relationship may actually be an approximately perpendicular relationship.

[0021] A simple secondary interlock is installed in the circuit breaker room of the switch cabinet. It is mainly used to lock the secondary aviation plug 4 when the trolley is in the working position in the circuit breaker room, preventing the trolley from plugging or unplugging the secondary plug in the working position and avoiding misjudgment of the secondary protection device.

[0022] Reference Figure 1 The secondary interlock includes a protective baffle 3, an adjustable connecting rod 2 and an interlocking mechanism. The protective baffle 3 is used to set the first end of the adjustable connecting rod 2. The protective baffle 3 is fixedly connected to the partition set at the top of the circuit breaker chamber. The interlocking mechanism is set at the second end of the adjustable connecting rod 2 and is used to lock and unlock the secondary aviation plug 4 set on the partition.

[0023] The secondary aviation plug 4 includes an action handle 41, which is used to pull the action handle 41 to perform the plugging and unplugging of the secondary aviation plug 4. The interlocking mechanism includes a fixed bracket 11, a transmission rod 12 and a baffle rod 13. The fixed bracket 11 is fixedly mounted on the partition. A rotating shaft is passed through the transmission rod 12. The two ends of the rotating shaft are respectively hinged to the two sides of the fixed bracket 11, so that the transmission rod 12 can rotate with the rotating shaft as the rotation center. One end of the transmission rod 12 is hinged to the second end of the adjustable connecting rod 2, and the baffle rod 13 is fixedly connected to the other end of the transmission rod 12. The movement of the adjustable connecting rod 2 can drive the rotation of the transmission rod 12, and then drive the swing of the baffle rod 13 within the set range. The two extreme ends of the movement range of the baffle rod 13 are the locking position and the unlocking position of the baffle rod 13 respectively. In the locked position, refer to Figure 3 The lever 13 is located within the action range of the action handle 41. The action handle 41 is held against the lever 13 and cannot unlock the secondary aviation plug 4, making it impossible to pull out the secondary aviation plug 4. In the unlocked position, refer to Figure 2 , the blocking rod 13 is out of the action range of the action handle 41 , so that the action handle 41 can unlock the secondary aviation plug 4 .

[0024] Preferably, in this embodiment, the length direction of the adjustable connecting rod 2 is arranged along the swinging direction of the trolley, and a through hole is provided on the protective baffle 3 for the first end of the adjustable connecting rod 2 to pass through. The end of the first end is also bent to provide an abutment portion. When the trolley is swung into the circuit breaker and the trolley is about to move to the working position, the trolley will abut against the abutment portion, and as the trolley continues to be swung in, the adjustable connecting rod 2 is driven to move by pushing the abutment portion. The movement of the adjustable connecting rod 2 drives the transmission member to rotate, thereby driving the blocking rod 13 to move to the locking position.

[0025] Furthermore, the interlocking mechanism also includes a reset spring, the two ends of which are respectively connected to the transmission member and the inner wall of the fixed bracket 11. When the trolley moves to the working position, the reset spring is stretched to the energy storage state, so that when the trolley is shaken out of the working position, the reset spring can drive the barrier rod 13 and the adjustable connecting rod 2 to reset.

[0026] The adjustable connecting rod 2 includes a first rod 21 and a second rod 22. The first rod 21 and the second rod 22 are partially overlapped in the length direction. A plurality of connecting holes are opened on the first rod 21 and the second rod 22 along the length direction. The first rod 21 and the second rod 22 are fixedly connected by bolts. The overlapping length of the first rod 21 and the second rod 22 can be set to adjust the overall length of the adjustable connecting rod 2.

[0027] A fine-tuning screw 23 is also provided on the abutment portion, and the fine-tuning screw 23 is threadedly connected to the abutment portion, and the axial direction of the fine-tuning screw 23 is set along the swing-in and swing-out direction of the trolley. During the swing-in process of the trolley, the end of the fine-tuning screw 23 is in abutment with the trolley. Then, when there is a certain error in the in-and-out direction in the working position of the trolley, the distance between the fine-tuning screw 23 and the abutment portion can be set to adjust the depth of contact between the trolley and the fine-tuning screw 23, thereby ensuring that the trolley can effectively drive the adjustable connecting rod 2 and the interlocking mechanism to move into place when it is in the working position.

[0028] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A simple secondary interlocking, characterized in that: The invention comprises an interlocking mechanism and an adjustable connecting rod (2), wherein the interlocking mechanism comprises a blocking rod (13) for locking an aviation plug (4), one end of the adjustable connecting rod (2) is hinged to the blocking rod (13) to drive the blocking rod (13) to swing, and the other end of the adjustable connecting rod (2) is provided with an abutting portion for abutting against a trolley.

2. A simplified secondary interlock according to claim 1, characterized in that: The abutting portion is provided with a fine-tuning screw (23), and the fine-tuning screw (23) is threadedly connected to the abutting portion along the movement direction of the trolley.

3. The simplified secondary interlock according to claim 1, characterized in that: The adjustable connecting rod (2) comprises a first rod (21) and a second rod (22), wherein the first rod (21) and the second rod (22) are partially stacked along a straight line direction of the adjustable connecting rod (2), and the first rod (21) and the second rod (22) are both provided with a plurality of connection holes for passing bolts.

4. The simplified secondary interlock according to claim 1, characterized in that: The interlocking mechanism further comprises a fixed bracket (11) and a transmission rod (12), wherein the transmission rod (12) is rotatably connected to the fixed bracket (11) via a rotating shaft, the blocking rod (13) is connected to one end of the transmission rod (12), and the adjustable connecting rod (2) is hinged to the other end of the transmission rod (12).

5. The simplified secondary interlock according to claim 4, characterized in that: It also includes a return spring, with two ends of the return spring respectively connected to the transmission rod (12) and the fixed bracket (11).

6. The simplified secondary interlock according to claim 1, characterized in that: It also includes a protective baffle (3), and a through hole for the adjustable connecting rod (2) to pass through is provided on the protective baffle (3).

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