Emergency opening device for switch cabinet

Abstract

The utility model discloses an emergency opening device for a switch cabinet, which comprises a pair of horizontal sliding chutes fixedly arranged on the outer side wall of a cabinet door and respectively arranged on the upper side and the lower side of an operation hole, and a pair of vertical strip-shaped insulating hard baffle plates of which the upper ends and the lower ends are respectively inserted into the pair of sliding chutes and lean against each other to shield the operation hole, and the pair of vertical lock pins are arranged on the upper side sliding grooves in a penetrating manner and lock the pair of strip-shaped insulating hard baffle plates in the upper side sliding grooves. According to the emergency opening device for the switch cabinet, emergency opening of the high-voltage circuit breaker can be realized when the switch cabinet breaks down; the problem that when the switch cabinet works normally, the high-voltage circuit breaker is opened by mistake due to the fact that foreign objects enter the control hole by mistake, and then accidents are caused can be solved; and the problem that when emergency opening needs to be carried out on the high-voltage circuit breaker, the sliding piece cannot be effectively pushed due to the fact that an appropriate special device cannot be found, and then emergency opening cannot be effectively carried out can be solved.

Description

Technical Field

[0001] This utility model relates to an emergency tripping device for switchgear. Background Technology

[0002] Chinese Patent Application No. 201020131927.6 discloses an emergency tripping device for switchgear, which is located at the operating hole of the switchgear door and is used to drive the tripping shaft of a high-voltage circuit breaker to achieve emergency tripping of the high-voltage circuit breaker in the event of a switchgear failure. Specifically, the emergency tripping device for switchgear of this patent has a drive mechanism located inside the operating hole for driving the tripping shaft to rotate. The drive mechanism consists of an operating arm, a guide tube, a sliding member, a fixing member, an operating lever, and a spring. When a switchgear failure occurs and emergency tripping of the high-voltage circuit breaker is required, a strip-shaped device is inserted into the operating hole and the sliding member is pushed inward to start the drive mechanism. The drive mechanism continues until it completes the rotation of the tripping shaft, achieving emergency tripping of the high-voltage circuit breaker. After tripping, the strip-shaped device releases the sliding member and exits the operating hole, and the sliding member can move outward to reset after being released.

[0003] Although the switchgear in this patent uses an emergency tripping device that can trip the high-voltage circuit breaker in case of a switchgear malfunction, the operating hole on the switchgear door is always open. Therefore, if a foreign object accidentally enters the operating hole while the switchgear is working normally, it may accidentally touch the sliding part, which may cause the drive mechanism to complete the rotation of the tripping shaft. Ultimately, this could cause the high-voltage circuit breaker to trip while the switchgear is working normally, thus leading to an accident.

[0004] In addition, the emergency tripping device for the switchgear in this patent does not have a dedicated device (such as a strip-shaped device) near the operating hole for pushing the sliding member into the operating hole. Therefore, when the switchgear malfunctions and the high-voltage circuit breaker needs to be tripped urgently, the sliding member may not be able to be pushed effectively because a suitable dedicated device cannot be found, and thus the emergency tripping cannot be effectively implemented. Summary of the Invention

[0005] To address the deficiencies in the existing technology, this utility model provides an emergency tripping device for switchgear, comprising: a drive mechanism located inside the operating hole of the switchgear door for driving the high-voltage circuit breaker tripping shaft to rotate; the drive mechanism consists of an operating arm, a guide tube, a sliding component, a fixing component, an operating lever, and a spring; further comprising: a pair of flat sliding grooves fixed to the outer wall of the cabinet door and located on the upper and lower sides of the operating hole; a pair of vertical strip-shaped insulating rigid baffles inserted into the pair of sliding grooves at their upper and lower ends and placed together to cover the operating hole; and a pair of vertical locking pins passing through the upper sliding groove, located on the lateral sides of the pair of strip-shaped insulating rigid baffles, and locking the pair of strip-shaped insulating rigid baffles in the upper sliding groove; the width of the pair of strip-shaped insulating rigid baffles is not less than the radius of the operating hole and is not greater than the diameter of the operating hole.

[0006] Preferably, the length of the pair of strip-shaped insulating rigid baffles is equal to the length of the guide tube.

[0007] Preferably, the pair of strip-shaped insulating rigid baffles are arranged symmetrically.

[0008] Preferably, the pair of locking pins are arranged symmetrically.

[0009] Preferably, the upper sliding groove has a pair of vertical through holes through which a pair of locking pins pass respectively.

[0010] Preferably, the pair of vertical through holes are arranged symmetrically.

[0011] The advantages and beneficial effects of this utility model are as follows: It provides an emergency tripping device for switchgear, which can realize the emergency tripping of the high-voltage circuit breaker when the switchgear fails; it can also avoid the problem of accidental tripping of the high-voltage circuit breaker due to foreign objects entering the control hole during normal operation of the switchgear, thus preventing accidents; it can also avoid the problem of not being able to effectively push the sliding part and thus not being able to effectively implement the emergency tripping when it is necessary to perform emergency tripping of the high-voltage circuit breaker because a suitable special device (such as a strip device) cannot be found.

[0012] Under normal conditions (i.e., when the switchgear is working normally and there is no need to perform emergency tripping of the high-voltage circuit breaker), the operating holes on the switchgear door are covered by a pair of strip-shaped insulating rigid baffles placed side by side. This can prevent foreign objects from accidentally entering the operating holes and avoid the problem of accidental tripping of the high-voltage circuit breaker due to foreign objects entering the operating holes during normal operation of the switchgear.

[0013] When a switchgear malfunctions and an emergency trip of the high-voltage circuit breaker is required, first pull out one or both of the pair of locking pins from the upper sliding groove. Then, remove the pair of strip-shaped insulating rigid baffles from the sliding grooves, fully opening the operating hole. Next, insert one of the strip-shaped insulating rigid baffles into the operating hole and push the sliding member inward through the strip-shaped insulating rigid baffle, causing the drive mechanism to start operating until the drive mechanism completes the rotation of the tripping shaft, thus achieving the emergency tripping of the high-voltage circuit breaker. After tripping, release the sliding member from the operating hole using the strip-shaped insulating rigid baffle, and allow the sliding member to move outward and reset after being released. Since the pair of strip-shaped insulating rigid baffles are located at the operating hole, the problem of not being able to effectively push the sliding member and thus fail to effectively perform emergency tripping when a suitable dedicated device (such as a strip-shaped device) cannot be found when an emergency tripping of the high-voltage circuit breaker is required can be avoided. Attached Figure Description

[0014] Figure 1 and Figure 2 This is a schematic diagram of the emergency tripping device for the switchgear under normal operating conditions (i.e., when the switchgear is working normally and emergency tripping of the high-voltage circuit breaker is not required); at this time, the operating port is blocked by a pair of strip-shaped insulating rigid baffles placed side by side; among them, Figure 1 This is a frontal view diagram. Figure 2 This is a side view diagram;

[0015] Figure 3 and Figure 4 This is a schematic diagram of an emergency tripping device for a switchgear when an emergency tripping of a high-voltage circuit breaker is required. At this time, a pair of strip-shaped insulating rigid baffles have been removed, thus the operating port is open, and one of the strip-shaped insulating rigid baffles is inserted into the operating port. Figure 3 This is a frontal view diagram. Figure 4 This is a side view diagram. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0017] The specific technical solution of this utility model is as follows:

[0018] like Figures 1 to 4As shown, this utility model provides an emergency tripping device for switchgear, including: a drive mechanism located inside the operation hole 91 of the switchgear door 9 for driving the high-voltage circuit breaker tripping shaft to rotate; the drive mechanism consists of an operating arm, a guide tube, a sliding member, a fixing member, an operating lever, and a spring; it also includes: a pair of flat sliding grooves (upper sliding groove A1 and lower sliding groove A2) fixed to the outer wall of the switchgear door 9 and located on the upper and lower sides of the operation hole 91, a pair of vertical strip-shaped insulating rigid baffles A3 inserted into the pair of sliding grooves A1 and A2 respectively and placed together to cover the operation hole 91, and a pair of vertical locking pins A4 passing through the upper sliding groove A1 and located on the lateral sides of the pair of strip-shaped insulating rigid baffles A3 to lock the pair of strip-shaped insulating rigid baffles A3 in the upper sliding groove A1;

[0019] The pair of strip-shaped insulating rigid baffles A3 are symmetrically arranged; the width of the pair of strip-shaped insulating rigid baffles A3 is not less than the radius of the operating hole 91, and not greater than the diameter of the operating hole 91; the length of the pair of strip-shaped insulating rigid baffles A3 is equal to the length of the guide tube body.

[0020] The pair of locking pins A4 are symmetrically arranged; the upper sliding groove A1 has a pair of vertical through holes A5 through which the pair of locking pins A4 pass respectively; the pair of vertical through holes A5 are symmetrically arranged.

[0021] The working principle of the emergency tripping device for switchgear of this utility model includes:

[0022] like Figure 1 and Figure 2 As shown, under normal conditions (i.e., when the switchgear is operating normally and emergency tripping of the high-voltage circuit breaker is not required), the operating hole 91 on the switchgear door 9 is covered by a pair of strip-shaped insulating rigid baffles A3 placed side by side. This prevents foreign objects from accidentally entering the operating hole 91, thus avoiding the possibility of the high-voltage circuit breaker tripping due to foreign objects entering the operating hole 91 during normal switchgear operation, which could lead to an accident. (If the operating hole 91 is not covered, i.e., if the operating hole 91 is always open, then during normal switchgear operation, if a foreign object accidentally enters the operating hole 91, it may accidentally touch the sliding part, which may cause the drive mechanism to complete the rotation of the tripping shaft, ultimately causing the high-voltage circuit breaker to trip during normal switchgear operation, thus leading to an accident.)

[0023] like Figure 3 and Figure 4As shown, when a switchgear malfunctions and an emergency trip of the high-voltage circuit breaker is required, first, pull out one or both of the pair of locking pins A4 from the upper slide groove A1. Then, remove the pair of strip-shaped insulating rigid baffles A3 from the pair of slide grooves (upper slide groove A1, lower slide groove A2), so that the operating hole 91 is fully open. Then, insert one of the strip-shaped insulating rigid baffles A3 into the operating hole, and push the sliding member inward through the strip-shaped insulating rigid baffle A3 to start the drive mechanism to operate until the drive mechanism completes the rotation of the tripping shaft, thereby realizing the emergency tripping of the high-voltage circuit breaker. After the tripping is completed, release the sliding member of the strip-shaped insulating rigid baffle A3 and exit the operating hole. The sliding member can also move outward to reset after being released. Since the pair of strip-shaped insulating rigid baffles A3 are set at the operating hole 91, the problem of not being able to effectively push the sliding member and thus not being able to effectively implement the emergency tripping when an emergency tripping of the high-voltage circuit breaker is required can be avoided because a suitable special device (such as a strip-shaped device) cannot be found.

[0024] This utility model is a partial improvement on the emergency tripping device for switchgear disclosed in Chinese Patent Application No. 201020131927.6. The main improvement is the addition of a pair of strip-shaped insulating rigid baffles A3 outside the operating hole 91 to shield it. This utility model does not improve other parts of the patent (no improvements to the switchgear interior), particularly not the drive mechanism located inside the operating hole 91 of the switchgear door 9, which drives the high-voltage circuit breaker tripping shaft (this drive mechanism consists of an operating arm, guide tube, sliding member, fixing member, operating lever, and spring). Therefore, the specific working process of the drive mechanism, especially the process of the drive mechanism driving the tripping shaft to rotate after the sliding member is pushed inward, and the process of the sliding member moving outward to reset after being released, can be found in the patent's description and will not be repeated here.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An emergency tripping device for switchgear, comprising: A drive mechanism located inside the operating hole of the switch cabinet door, used to drive the high-voltage circuit breaker tripping shaft to rotate; The drive mechanism consists of a control arm, a guide tube, a sliding component, a fixing component, a control lever, and a spring; its characteristic is that it further includes: A pair of flat sliding grooves fixed to the outer wall of the cabinet door and located on the upper and lower sides of the operating hole; a pair of vertical strip-shaped insulating rigid baffles inserted into the pair of sliding grooves at their upper and lower ends and placed together to cover the operating hole; and a pair of vertical locking pins passing through the upper sliding groove, located on the horizontal sides of the pair of strip-shaped insulating rigid baffles, and locking the pair of strip-shaped insulating rigid baffles in the upper sliding groove; the width of the pair of strip-shaped insulating rigid baffles is not less than the radius of the operating hole and is not greater than the diameter of the operating hole.

2. The emergency tripping device for switchgear according to claim 1, characterized in that, The lengths of the pair of strip-shaped insulating rigid baffles are both equal to the length of the guide tube.

3. The emergency tripping device for switchgear according to claim 1, characterized in that, The pair of strip-shaped insulating rigid baffles are symmetrically arranged.

4. The emergency tripping device for switchgear according to claim 1, characterized in that, The pair of vertical locking pins are symmetrically arranged.

5. The emergency tripping device for switchgear according to claim 1, characterized in that, The upper sliding groove has a pair of vertical through holes through which a pair of locking pins pass respectively.

6. The emergency tripping device for switchgear according to claim 5, characterized in that, The pair of vertical through holes are symmetrically arranged.

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