Circuit breaker opening and closing indication structure, circuit breaker and switch cabinet

Abstract

The invention belongs to the field of switch state indicating devices, and particularly provides a circuit breaker opening and closing indicating structure, a circuit breaker and a switch cabinet. According to the indicating structure, the limiting hole is formed in the mechanism box body, the stroke of the opening and closing indicating piece is limited through the limiting hole, and the opening and closing indicating piece is limited at the correct indicating position. Meanwhile, the elastic piece is connected to the driving mechanism for driving the opening and closing indicating piece to swing, the stroke of the output shaft of the circuit breaker is compensated through deformation of the elastic piece, and normal opening and closing of the circuit breaker are guaranteed. The circuit breaker comprises the indication structure. The switch cabinet comprises the circuit breaker.

Description

Technical Field

[0001] The present invention belongs to the field of switch state indicating devices, and in particular relates to a circuit breaker opening and closing indicating structure, a circuit breaker and a switch cabinet. Background Art

[0002] The technical requirements for medium-voltage switchgear clearly state that the circuit breaker opening and closing indicators should correctly indicate the position, which is of great significance for maintenance personnel to determine the status of the equipment.

[0003] The existing circuit breaker opening and closing indication structures are mostly directly related to the opening and closing positions of the circuit breaker, such as Figure 1 As shown, pull rod 1 can be connected to the output crank arm of the circuit breaker mechanism and can move with the output crank arm. Pull rod 1 is connected to an auxiliary connecting rod 5, which is connected to a toggle lever 2, which is connected to an open / close indicator 7. When the circuit breaker is opened or closed, the output crank arm can drive pull rod 1 to move. The movement of pull rod 1, through the auxiliary connecting rod 5 and toggle lever 2, drives the open / close indicator 7 to swing clockwise or counterclockwise, thus reflecting the current open / close status of the circuit breaker.

[0004] But in fact, the stroke range of the circuit breaker's opening and closing position is usually within a certain range, generally between 3mm and 5mm. The actual opening position of the circuit breaker is adjustable, which will cause the position of the opening and closing indicator to change accordingly. The final indicated position will deviate, making it difficult to correctly indicate the position and failing to meet the requirements. Summary of the Invention

[0005] The present invention aims to provide a circuit breaker opening and closing indication structure to solve the technical problem of inaccurate circuit breaker opening and closing indication in the prior art. The present invention also aims to provide a circuit breaker and a switch cabinet to solve the same technical problem.

[0006] To achieve the above-mentioned purpose, the technical solution of the circuit breaker opening and closing indication structure provided by the present invention is: A circuit breaker opening and closing indication structure includes a mechanism box body, a swingable opening and closing indicator part is connected to the mechanism box body, an arc-shaped limiting hole is provided on the mechanism box body, the central axis of the limiting hole coincides with the swing axis of the opening and closing indicator part, a limiting column is provided on the opening and closing indicator part which can be guided and moved along the limiting hole, the length of the limiting hole satisfies that when the limiting column moves to the two ends of its arc length direction, the opening and closing indicator part corresponds to the opening indication position and the closing indication position respectively, a swingable driving lever is installed on the mechanism box body, one end of the driving lever is hinged with a pull rod for being hinged to the output crank arm of the circuit breaker, so that the driving lever is driven to swing by the pull rod, and a driving elastic part is connected to the driving lever, which is in transmission connection with the opening and closing indicator part, so that the opening and closing indicator part is driven to swing by the driving elastic part.

[0007] As a further improvement, the driving elastic member is a torsion spring sleeved on the swing shaft of the shifting rod, and the two torsion arms of the torsion spring are respectively connected to the shifting rod and the limiting column.

[0008] As a further improvement, the separation and combination indicator is located on one side of the mechanism box, the shift rod is located on the other side of the mechanism box, the limiting column passes through the limiting hole, and the driving elastic member is connected to the part of the limiting column passing through the limiting hole.

[0009] As a further improvement, one end of the shifting rod facing away from the pull rod is used to be hinged to the auxiliary connecting rod of the circuit breaker, so as to drive the auxiliary connecting rod to swing when the shifting rod swings.

[0010] The present invention is a pioneering invention, and its beneficial effects are as follows: First, the present invention provides an arc-shaped limit hole on the mechanism box and a limit column on the opening and closing indicator. Since the central axis of the limit hole coincides with the central axis of the opening and closing indicator, when the opening and closing indicator swings, the limit column can also move along the guide of the limit hole. By reasonably configuring the length of the limit hole, when the limit column moves to the extreme positions at both ends of the limit hole, the opening and closing indicator is just in the appropriate opening indication position indicating opening and the closing indication position indicating closing, respectively, and no longer moves, thereby ensuring the accuracy of the indication position.

[0011] Secondly, a driving elastic part is connected to the pull rod and lever mechanism that drives the opening and closing indicator to swing, so as to drive the opening and closing indicator to swing through the driving elastic part. At this time, after the opening and closing indicator is swung into place, the elastic deformation of the driving elastic part itself can be used to compensate for the stroke of the circuit breaker output shaft, thereby ensuring that the circuit breaker can be opened and closed normally.

[0012] To achieve the above-mentioned purpose, the technical solution of the circuit breaker provided by the present invention is: A circuit breaker includes an opening and closing indication structure, which includes a mechanism box body, a swingable opening and closing indicator part connected to the mechanism box body, an arc-shaped limiting hole provided on the mechanism box body, a central axis of the limiting hole coincides with the swing axis of the opening and closing indicator part, a limiting column guided and movable along the limiting hole provided on the opening and closing indicator part, the length of the limiting hole being such that when the limiting column moves to both ends in the direction of its arc length, the opening and closing indicator part corresponds to the opening indication position and the closing indication position respectively, a swingable driving lever is installed on the mechanism box body, one end of the driving lever is hinged to a pull rod, and the other end of the pull rod is hinged to an output crank arm so as to drive the driving lever to swing via the pull rod, a driving elastic part is connected to the driving lever, and the driving elastic part is transmission-connected to the opening and closing indicator part so as to drive the opening and closing indicator part to swing via the driving elastic part.

[0013] As a further improvement, the driving elastic member is a torsion spring sleeved on the swing shaft of the shifting rod, and the two torsion arms of the torsion spring are respectively connected to the shifting rod and the limiting column.

[0014] As a further improvement, the separation and combination indicator is located on one side of the mechanism box, the shift rod is located on the other side of the mechanism box, the limiting column passes through the limiting hole, and the driving elastic member is connected to the part of the limiting column passing through the limiting hole.

[0015] As a further improvement, one end of the shift lever facing away from the pull rod is hinged to the auxiliary connecting rod to drive the auxiliary connecting rod to swing when the shift lever swings.

[0016] The present invention is an improved invention, and its beneficial effects are as follows: First, the present invention provides an arc-shaped limit hole on the mechanism box and a limit column on the opening and closing indicator. Since the central axis of the limit hole coincides with the central axis of the opening and closing indicator, when the opening and closing indicator swings, the limit column can also move along the guide of the limit hole. By reasonably configuring the length of the limit hole, when the limit column moves to the extreme positions at both ends of the limit hole, the opening and closing indicator is just in the appropriate opening indication position indicating opening and the closing indication position indicating closing and no longer moves, thereby ensuring the accuracy of the indication position.

[0017] Secondly, a driving elastic part is connected to the pull rod and lever mechanism that drives the opening and closing indicator to swing, so as to drive the opening and closing indicator to swing through the driving elastic part. At this time, after the opening and closing indicator is swung into place, the elastic deformation of the driving elastic part itself can be used to compensate for the stroke of the circuit breaker output shaft, thereby ensuring that the circuit breaker can be opened and closed normally.

[0018] To achieve the above objectives, the technical solution of the switch cabinet provided by the present invention is: The switch cabinet includes a circuit breaker equipped with an opening and closing indication structure, the indication structure includes a mechanism box body, a swingable opening and closing indicator part is connected to the mechanism box body, an arc-shaped limit hole is provided on the mechanism box body, the center axis of the limit hole coincides with the swing axis of the opening and closing indicator part, the opening and closing indicator part is provided with a limit column that can be guided and moved along the limit hole, the length of the limit hole satisfies that when the limit column moves to the two ends of its arc length direction, the opening and closing indicator part corresponds to the opening indication position and the closing indication position respectively, a swingable driving rod is installed on the mechanism box body, one end of the driving rod is hinged with a pull rod, and the other end of the pull rod is hinged with the output crank arm to drive the driving rod to swing through the pull rod, the driving rod is connected to the driving elastic part, and the driving elastic part is transmission-connected to the opening and closing indicator part to drive the opening and closing indicator part to swing through the driving elastic part.

[0019] As a further improvement, the driving elastic member is a torsion spring sleeved on the swing shaft of the shifting rod, and the two torsion arms of the torsion spring are respectively connected to the shifting rod and the limiting column.

[0020] As a further improvement, the separation and combination indicator is located on one side of the mechanism box, the shift rod is located on the other side of the mechanism box, the limiting column passes through the limiting hole, and the driving elastic member is connected to the part of the limiting column passing through the limiting hole.

[0021] As a further improvement, one end of the shift lever facing away from the pull rod is hinged to the auxiliary connecting rod to drive the auxiliary connecting rod to swing when the shift lever swings.

[0022] The present invention is an improved invention, and its beneficial effects are as follows: First, the present invention provides an arc-shaped limit hole on the mechanism box and a limit column on the opening and closing indicator. Since the central axis of the limit hole coincides with the central axis of the opening and closing indicator, when the opening and closing indicator swings, the limit column can also move along the guide of the limit hole. By reasonably configuring the length of the limit hole, when the limit column moves to the extreme positions at both ends of the limit hole, the opening and closing indicator is just in the appropriate opening indication position indicating opening and the closing indication position indicating closing and no longer moves, thereby ensuring the accuracy of the indication position.

[0023] Secondly, a driving elastic part is connected to the pull rod and lever mechanism that drives the opening and closing indicator to swing, so as to drive the opening and closing indicator to swing through the driving elastic part. At this time, after the opening and closing indicator is swung into place, the elastic deformation of the driving elastic part itself can be used to compensate for the stroke of the circuit breaker output shaft, thereby ensuring that the circuit breaker can be opened and closed normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a circuit breaker opening and closing indication structure in the prior art; Figure 2 A schematic diagram of an embodiment of the circuit breaker opening and closing indication structure in the present invention in the open state; Figure 3 A schematic diagram of an embodiment of the circuit breaker opening and closing indication structure of the present invention in the open state (with the lever hidden); Figure 4 A schematic diagram of an embodiment of the circuit breaker opening and closing indication structure in the present invention in the closed state; Figure 5 A schematic diagram of an embodiment of the circuit breaker opening and closing indication structure in the present invention in the closed state (with the lever hidden); Figure 6 A schematic diagram of the connection relationship between the shifting rod, the torsion spring and the opening and closing indicator member of the embodiment of the circuit breaker opening and closing indicator structure of the present invention; Figure 7 This is a schematic diagram of the mechanism box, torsion spring, and opening and closing indicator of the circuit breaker opening and closing indication structure implementation embodiment of the present invention from other perspectives.

[0025] Description of reference numerals: 1. Pull rod; 2. Push rod; 3. Push rod shaft; 4. Auxiliary crank arm; 5. Auxiliary connecting rod; 6. Limit hole; 7. Opening and closing indicator; 8. Mechanism housing; 9. Output shaft; 10. Output crank arm; 11. Torsion spring; 12. Limit column; 13. Swing shaft. DETAILED DESCRIPTION

[0026] To accurately indicate the circuit breaker's open / close status, the present invention employs a limit hole in the mechanism housing to restrict the travel of the open / close indicator, confining it to the correct indication position. Furthermore, an elastic member is attached to the drive mechanism that drives the open / close indicator. This elastic member's deformation compensates for the travel of the circuit breaker's output shaft, ensuring proper circuit breaker opening and closing.

[0027] Based on the above concept, the present invention is further described in detail below in conjunction with the embodiments.

[0028] Specific implementation of the circuit breaker opening and closing indication structure provided by the present invention: The circuit breaker opening and closing indication structure provided in this embodiment is used as follows Figure 2-Figure 7 As shown, the indication structure includes a mechanism housing 8, which serves as an installation base and can be installed on the cabinet of the switch cabinet when in use. The mechanism housing 8 is connected to an opening and closing indicator 7, which is a component that indicates the opening and closing status of the circuit breaker. The opening and closing indicator 7 can swing relative to the mechanism housing 8. The opening and closing indicator 7 is provided with opening and closing indication information. When it swings to different positions, different indication information (such as "ON" and "OFF") can move to the indication position to display different indication information. The opening and closing indicator 7 can be installed on the mechanism housing 8 through a swing shaft 13. Specifically, the swing shaft 13 can be rotatable relative to the mechanism housing 8 and the opening and closing indicator 7 is fixed relative to the swing shaft 13, or the swing shaft 13 can be fixed relative to the mechanism housing 8 and the opening and closing indicator 7 is rotatable relative to the swing shaft 13. It is sufficient to achieve that the opening and closing indicator 7 can swing relative to the mechanism housing 8.

[0029] The mechanism housing 8 is also provided with a limit hole 6, which is an arc-shaped hole. The central axis of the limit hole 6 coincides with the swing axis of the opening / closing indicator 7. Furthermore, the opening / closing indicator 7 is provided with a limit post 12, which can be guided along the limit hole 6. Because the central axis of the limit hole 6 coincides with the central axis of the opening / closing indicator 7, the limit post 12 slides precisely along the limit hole 6 during the normal swing of the opening / closing indicator 7, without interfering with each other's movement.

[0030] The length of the limiting hole 6 satisfies that when the limiting column 12 moves to both ends of its arc length direction, the opening and closing indicator 7 just moves to the opening indication position and the closing indication position respectively. The opening indication position refers to the position where the opening and closing indicator 7 indicates the opening information, and the closing indication position refers to the position where the opening and closing indicator 7 indicates the closing information.

[0031] Under the limiting effect of the limiting hole 6, the opening and closing indicator 7 is in the correct indicating position when it swings back and forth to the extreme positions at both ends of the limiting hole 6, thereby meeting the technical requirements.

[0032] The action of the opening and closing indicator 7 is related to the output shaft 9 of the circuit breaker, that is, the swing of the opening and closing indicator 7 is driven by the output shaft 9. Figure 2 and Figure 4 As shown, a swingable lever 2 is mounted on the mechanism housing 8 and can be mounted on the mechanism housing 8 via a lever shaft 3. A pull rod 1 is hingedly connected to one end of the lever 2. When in use, the pull rod 1 can be hinged to the output crank arm 10 of the circuit breaker, and the rotation of the output shaft 9 can be transmitted to the lever 2 via the pull rod 1.

[0033] The shift lever 2 is connected to a driving elastic member, and the shift lever 2 is transmission-connected to the opening / closing indicator member 7 via the driving elastic member, so as to drive the opening / closing indicator member 7 to swing via the driving elastic member.

[0034] Specifically, in some embodiments, Figure 2-Figure 7 As shown, the driving elastic member can be a torsion spring 11 sleeved on the swing axis of the shift lever 2, namely the shift lever shaft 3, and the two torsion arms of the torsion spring 11 are respectively connected to the shift lever 2 and the limiting column 12.

[0035] When the output shaft 9 rotates to open or close the circuit breaker, the action of the pull rod 1 causes the lever 2 to swing, which in turn, via the torsion spring 11, causes the opening / closing indicator 7 to swing. When the opening / closing indicator 7 swings to the limit position where the limit post 12 is within the limit hole 6, it is in the correct indicating position. Even if the output shaft 9 of the circuit breaker continues to rotate within a certain range of travel, the torsion spring 11 can compensate for this travel through its own elastic deformation, thus ensuring that the circuit breaker can open and close normally.

[0036] It should be noted that in other embodiments, the driving elastic member may also be other forms of elastic members, such as a tension spring, a tension rope, etc. When a tension spring is used, one end of the tension spring is connected to the lever 2, and the other end is connected to the on / off indicator 7. When the lever 2 swings, the tension spring is stretched, thereby driving the on / off indicator 7 and compensating for the travel of the circuit breaker. However, it is understood that because the lever 2 swings in both directions, using a torsion spring 11 as the driving elastic member provides a better compensation effect.

[0037] In some preferred embodiments, Figure 2 As shown, the opening and closing indicator 7 is located on one side of the mechanism housing 8, the shift lever 2 is located on the other side of the mechanism housing 8, and the limiting column 12 passes through the limiting hole 6. Figure 3 As shown, the driving elastic member (torsion spring 11) is connected to the portion of the limiting column 12 that passes through the limiting hole 6, so as to drive the opening and closing indicator 7 to swing by driving the limiting column 12 to slide in the limiting hole 6.

[0038] It is easy to understand that compared with arranging the separation and combination indicator 7 and the shift lever 2 on the same side of the mechanism housing 8, this method can naturally separate the shift lever 2 and the separation and combination indicator 7 in the axial direction, making it easier to install the shift lever 2 and the separation and combination indicator 7.

[0039] Furthermore, in some embodiments, Figure 2 and Figure 4 As shown, when in use, the end of the lever 2 facing away from the pull rod 1 can be hinged to the auxiliary connecting rod 5 of the circuit breaker. When the lever 2 swings, the lever 2 can drive the auxiliary connecting rod 5 to swing, and then drive the auxiliary crank arm 4 to swing, thereby controlling the action of the auxiliary contacts to display the opening and closing states of the circuit breaker.

[0040] Specific implementation of the circuit breaker provided by the present invention: The circuit breaker is equipped with an opening and closing indication structure, which is consistent with the implementation structure of the opening and closing indication structure of the circuit breaker described above and will not be described in detail here.

[0041] Specific implementation of the switch cabinet provided by the present invention: The switch cabinet includes a circuit breaker, which is equipped with an opening and closing indication structure. The opening and closing indication structure is consistent with the above-mentioned circuit breaker opening and closing indication structure implementation structure and will not be described in detail here.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. The circuit breaker opening and closing indication structure is characterized by: The invention comprises a mechanism box body, to which a swingable opening and closing indicator is connected, an arc-shaped limiting hole is provided on the mechanism box body, the central axis of the limiting hole coincides with the swing axis of the opening and closing indicator, a limiting column which can be guided and moved along the limiting hole is provided on the opening and closing indicator, and the length of the limiting hole satisfies that when the limiting column moves to both ends in the direction of its arc length, the opening and closing indicator corresponds to the opening indication position and the closing indication position respectively, a swingable driving lever is installed on the mechanism box body, one end of the driving lever is hinged with a pull rod for being hinged to the output crank arm of the circuit breaker, so as to drive the driving lever to swing through the pull rod, a driving elastic member is connected to the driving lever, and the driving elastic member is transmission-connected to the opening and closing indicator, so as to drive the opening and closing indicator to swing through the driving elastic member.

2. The circuit breaker opening and closing indication structure according to claim 1, characterized in that: The driving elastic member is a torsion spring sleeved on the swing shaft of the shifting rod, and two torsion arms of the torsion spring are respectively connected with the shifting rod and the limiting column.

3. The circuit breaker opening and closing indication structure according to claim 1 or 2, characterized in that: The opening and closing indicator is located on one side of the mechanism box, the shift rod is located on the other side of the mechanism box, the limiting column passes through the limiting hole, and the driving elastic member is connected to the portion of the limiting column passing through the limiting hole.

4. The circuit breaker opening and closing indication structure according to claim 1 or 2, characterized in that: The end of the shifting rod facing away from the pull rod is used to be hinged to the auxiliary connecting rod of the circuit breaker, so as to drive the auxiliary connecting rod to swing when the shifting rod swings.

5. A circuit breaker including an opening and closing indication structure, characterized in that: The indicating structure includes a mechanism box body, which is connected to a swingable opening and closing indicator, an arc-shaped limiting hole is provided on the mechanism box body, the central axis of the limiting hole coincides with the swing axis of the opening and closing indicator, and the opening and closing indicator is provided with a limiting column that can be guided and moved along the limiting hole. The length of the limiting hole satisfies that when the limiting column moves to both ends of its arc length direction, the opening and closing indicator corresponds to the opening indication position and the closing indication position respectively. A swingable driving lever is installed on the mechanism box body, one end of the driving lever is hinged with a pull rod, and the other end of the pull rod is hinged with the output crank arm to drive the driving lever to swing through the pull rod, and a driving elastic member is connected to the driving lever, which is in transmission connection with the opening and closing indicator to drive the opening and closing indicator to swing through the driving elastic member.

6. The circuit breaker according to claim 5, wherein: The driving elastic member is a torsion spring sleeved on the swing shaft of the shifting rod, and two torsion arms of the torsion spring are respectively connected with the shifting rod and the limiting column.

7. The circuit breaker according to claim 5 or 6, characterized in that: The opening and closing indicator is located on one side of the mechanism box, the shift rod is located on the other side of the mechanism box, the limiting column passes through the limiting hole, and the driving elastic member is connected to the portion of the limiting column passing through the limiting hole.

8. The circuit breaker according to claim 5 or 6, characterized in that: One end of the shifting rod facing away from the pull rod is hinged to the auxiliary connecting rod, so as to drive the auxiliary connecting rod to swing when the shifting rod swings.

9. A switchgear comprising a circuit breaker equipped with an opening and closing indication structure, characterized in that: The circuit breaker is the circuit breaker according to any one of claims 5 to 8.

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