Mechanical locking mechanism of switch cabinet

Abstract

The utility model relates to the technical field of circuit breaker handcarts in switch cabinets, in particular to a mechanical locking mechanism of a switch cabinet, which comprises a handcart chamber arranged in the switch cabinet, and guide rails used for smoothly moving a circuit breaker handcart are arranged on two sides in the handcart chamber. The guide rail is provided with a mechanical locking mechanism used for locking the circuit breaker handcart at a test position. The mechanical locking mechanism is provided with a baffle plate and a head spring bolt, wherein the baffle plate penetrates through and protrudes out of the guide rail and blocks a chassis of the circuit breaker handcart. A limiting unit; and a fixing assembly. According to the utility model, through the arrangement of the limiting unit, after the grounding switch is opened, the head spring bolt which is interlocked and retracted on the guide rail is blocked and limited on the outer side surface of the guide rail, so that the head spring bolt is ensured not to retract and fall into the guide rail; and through the arranged fixing assembly, the head lock tongue of the head combination can be conveniently assembled, disassembled and separated at the end of the baffle, and the operation is simpler, more convenient and faster when the limiting unit installed on the head lock tongue is overhauled and maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to switchgear internal circuit breaker handcart technical field, concretely relates to a switchgear mechanical locking mechanism. BACKGROUND

[0002] The realization principle that switchgear prevents the mechanical locking function of circuit breaker with ground knife: the baffle and the block on the guide rail are extended after the closing of the grounding switch. When the circuit breaker handcart is in the test position, the baffle blocks the handcart chassis, and the handcart cannot move from the test position to the working position. At the same time, the block under the baffle blocks the transmission screw rod locking mechanism of the handcart, so that the handcart cannot move. When the grounding switch is in the open position, the baffle and the block on the guide rail are retracted, and the circuit breaker handcart can move smoothly from the test position to the working position without any hindrance.

[0003] At present, the mechanical locking mechanism not only prevents the circuit breaker with ground knife, but also prevents the misoperation of the grounding knife. Its reliability is crucial for the safe operation of the staff. However, after multiple operations, the spring releases a large amount of energy, and the inertia easily causes the locking tongue to fall into the guide rail and get stuck, which not only makes the five-prevention locking mechanism ineffective, but also affects the normal opening and closing operation of the switch.

[0004] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as the closest prior art. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the above-mentioned defects, and provides a switchgear mechanical locking mechanism.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme: a switchgear mechanical locking mechanism, comprising a handcart room arranged in a switchgear, guide rails are arranged on both sides of the handcart room for smooth movement of the circuit breaker handcart, a mechanical locking mechanism is arranged on the guide rail for locking the circuit breaker handcart in the test position, a baffle is arranged on the mechanical locking mechanism, which protrudes through the guide rail and blocks the chassis of the circuit breaker handcart, and a head locking tongue is detachably arranged on the head of the baffle;

[0007] A limiting unit is arranged on the head locking tongue for blocking and limiting the head locking tongue on the outside of the guide rail after the head locking tongue is retracted;

[0008] A fixing assembly is arranged on the baffle, comprising a first fixing unit and a second fixing unit adapted to be arranged on the head locking tongue and connected to the end of the baffle.

[0009] Further, the limiting unit comprises a rotating rod arranged on the head lock tongue and two torsion springs symmetrically sleeved on the rotating rod, and the proximal ends of the two torsion springs are fixed with a locking pin sleeved on the middle part of the rotating rod.

[0010] Further, the baffle and the head lock tongue are provided with a through slot in communication and used for circumferential rotation of the locking pin, and the head lock tongue is provided with an arc-shaped stopper at the outer end and closing one side of the through slot;

[0011] The arc-shaped stopper is used for preventing the locking pin from being excessively deviated.

[0012] Further, the first fixing unit comprises a magnetic block arranged on the baffle and located on the upper side of the through slot and a slot block symmetrically arranged on the lower part of the magnetic block.

[0013] Further, the second fixing unit comprises a metal slot arranged on the head lock tongue and matched with the magnetic block and a locking pin symmetrically arranged on the lower part of the metal slot and matched with the slot block.

[0014] Compared with the prior art, the utility model has the beneficial effects that: the limiting unit is arranged, the head lock tongue retracted and locked on the guide rail is blocked and limited on the outer side of the guide rail after the grounding switch is opened, so that the head lock tongue cannot be retracted into the guide rail, and normal opening and closing operation is maintained; and the fixing assembly is arranged, the head lock tongue combined with the head of the baffle can be conveniently assembled and disassembled at the end of the baffle, and the operation of maintaining and repairing the limiting unit arranged on the head lock tongue is more convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of this application form a part of the application and serve to further provide a further understanding of the application, the illustrative embodiments of the application and the explanations thereof serve to explain the application without constituting an improper limitation of the application. In the drawings:

[0016] Figure 1 It is a perspective view of the switch cabinet body in one embodiment of the utility model from one angle;

[0017] Figure 2 It is a perspective view of the baffle installed on the guide rail in one embodiment of the utility model from one angle;

[0018] Figure 3 It is a perspective view of the head lock tongue in one embodiment of the utility model from one angle;

[0019] Figure 4 It is a structural schematic view of the baffle and the head lock tongue combined in the fixed state of the circuit breaker handcart in one embodiment of the utility model;

[0020] Figure 5 The structure schematic diagram of the combined baffle and head lock tongue of the circuit breaker handcart in the moving state is applied to an embodiment of the utility model.

[0021] In the drawing: 100, handcart room; 101, guide rail; 102, mechanical locking mechanism; 1, baffle; 2, head lock tongue; 3, limiting unit; 31, rotating rod; 32, torsional spring; 33, bayonet; 41, magnetic block; 411, metal groove; 42, slot block; 421, bolt; 5, through slot; 6, arc-shaped stop block. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. The embodiments in the application and the features in the embodiments can be combined with each other without conflict. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, if the certain posture changes, the directional indications also change accordingly.

[0024] In addition, if the embodiments of the utility model involve the description of "first", "second", etc., the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B scheme. In addition, "multiple" means two or more. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0025] As Figures 1-5The utility model discloses a mechanical locking mechanism, apply in switchgear, including setting in switchgear's handcart room 100, the handcart room 100 inside both sides are provided with the guide rail 101 for the smooth movement circuit breaker handcart, be provided with the mechanical locking mechanism 102 for locking circuit breaker handcart in test position on the guide rail 101, be provided with the baffle 1 and the head lock tongue 2 of detachable setting in the head of the baffle 1 on the mechanical locking mechanism 102 protrude through the guide rail 101 and stop circuit breaker handcart chassis,

[0026] Limiting unit 3, setting on the head lock tongue 2, for stopping and limiting the head lock tongue 2 on the outside of the guide rail 101 after the head lock tongue 2 retraction,

[0027] Fixed assembly, including setting on the baffle 1's first fixed unit and the second fixed unit for connecting in the end of the baffle 1 and being adapted to setting on the head lock tongue 2.

[0028] Specific implementation, in switchgear operation circuit breaker handcart ground switch closing, the guide rail 101 on interlocking detachable combination's baffle 1 and head lock tongue 2 and stopper stretch out (such as Figure 4 The utility model discloses a mechanical locking mechanism, apply in switchgear, including setting in switchgear's handcart room 100, the handcart room 100 inside both sides are provided with the guide rail 101 for the smooth movement circuit breaker handcart, be provided with the mechanical locking mechanism 102 for locking circuit breaker handcart in test position on the guide rail 101, be provided with the baffle 1 and the head lock tongue 2 of detachable setting in the head of the baffle 1 on the mechanical locking mechanism 102 protrude through the guide rail 101 and stop circuit breaker handcart chassis, Figure 5 When circuit breaker handcart is in test position, the head lock tongue 2 that stretches out will stop circuit breaker handcart chassis, hinder circuit breaker handcart from test position to working position movement, and the stopper under head lock tongue 2 top circuit breaker handcart's transmission screw locking mechanism, also make handcart unable to move.

[0029] Through the limiting unit 3 on the head lock tongue 2, the head lock tongue 2 on the guide rail 101 interlocking retraction can be stopped and limited on the outside of the guide rail 101 after the ground switch is opened, so as to guarantee that the head lock tongue 2 will not retract and drop into the inside of the guide rail 101, avoids the deformation of the related mechanism installed in the guide rail 101;

[0030] Also through the fixed assembly of the first fixed unit and the second fixed unit between the baffle 1 and the head lock tongue 2, the head lock tongue 2 can be conveniently detached and separated on the end face of the baffle 1, and the limiting unit 3 on the head lock tongue 2 can be operated more simply and quickly when being maintained, and the operation is simple.

[0031] In an embodiment, the limiting unit 3 comprises a rotating rod 31 arranged on the head lock tongue 2 and two torsion springs 32 symmetrically arranged on the rotating rod 31, and a locking pin 33 arranged in the middle of the rotating rod 31 and fixed on the proximal end of the two torsion springs 32. In this way, by rotating the rotating rod 31 installed in the groove on the head lock tongue 2 up and down, and arranging the two torsion springs 32 on the rotating rod 31 up and down, and screwing the proximal end of the two torsion springs 32 to the locking pin 33 arranged in the middle of the rotating rod 31, the circuit breaker trolley can be limited in the test position when the head lock tongue 2 is extended.

[0032] When the head lock tongue 2 is retracted, the locking pin 33 vertically inserted on the head lock tongue 2 will block the retracted head lock tongue 2 on the guide rail 101 and limit it on the outer side of the guide rail 101, so as to ensure that the head lock tongue 2 will not retract into the inside of the guide rail 101.

[0033] In an embodiment, the baffle 1 and the head lock tongue 2 are provided with a through groove 5 in communication and used for circumferential rotation of the locking pin 33, and an arc-shaped stop block 6 is arranged on the outer end of the head lock tongue 2 and closes one side of the through groove 5.

[0034] The arc-shaped stop block 6 is used to prevent the locking pin 33 from deviating too much. In this way, by machining the through groove 5 in communication with the baffle 1 at the position of the limiting unit 3 installed on the head lock tongue 2, and welding the arc-shaped stop block 6 on one side of the through groove 5 on the head lock tongue 2, one end of the locking pin 33 can be limited in the through groove 5 during rotation, so as to avoid excessive deviation.

[0035] In an embodiment, the first fixing unit comprises a magnetic block 41 arranged on the baffle 1 and placed on the upper side of the through groove 5, and a slot block 42 symmetrically arranged on the lower part of the magnetic block 41. In this way, by slotting and embedding the magnetic block 41 on the upper side of the through groove 5 on the baffle 1, and welding the slot block 42 on the lower part of the symmetric magnetic block 41.

[0036] In an embodiment, the second fixing unit comprises a metal groove 411 arranged on the head lock tongue 2 and matched with the magnetic block 41, and a plug 421 symmetrically arranged at the lower part of the metal groove 411 and matched with the plug-in groove block 42. In this way, by means of the metal groove 411 machined on the head lock tongue 2 and made of metal material and the plug-in groove block 42 welded in the groove machined at the lower part of the symmetric metal groove 411, when splicing, the plug 421 on the head lock tongue 2 is first inserted into the plug-in groove block 42 obliquely, then the end surface of the baffle 1 is abutted against the metal groove 411 installed on the upper side of the head lock tongue 2, so that the metal groove 411 is fixed with the magnetic block 41 by magnetic attraction; when disassembling, the magnetic block 41 and the metal groove 411 are first separated, and then the plug 421 is gradually separated and pulled out from the plug-in groove block 42 obliquely.

[0037] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced in the present application.

Claims

1. A mechanical locking mechanism of a switch cabinet, comprising a trolley room (100) arranged in the switch cabinet, wherein guide rails (101) for smoothly moving a circuit breaker trolley are arranged on both sides of the trolley room (100), and a mechanical locking mechanism (102) for locking the circuit breaker trolley in a test position is arranged on the guide rails (101), characterized in that: The mechanical locking mechanism (102) is provided with a baffle (1) penetrating the guide rail (101) and blocking the chassis of the circuit breaker trolley, and a head locking tongue (2) detachably arranged at the head of the baffle (1); A limiting unit (3) is arranged on the head locking tongue (2) and used for blocking and limiting the head locking tongue (2) outside the guide rail (101) after the head locking tongue (2) is retracted; A fixing assembly includes a first fixing unit arranged on the baffle (1) and a second fixing unit adaptively arranged on the head locking tongue (2) and used for being connected at the end of the baffle (1).

2. A mechanical interlocking mechanism for switchgear according to claim 1, characterized in that: The limiting unit (3) includes a rotating rod (31) arranged on the head locking tongue (2) and two torsion springs (32) symmetrically sleeved on the rotating rod (31), and the two torsion springs (32) are fixed with a clamping pin (33) sleeved on the middle part of the rotating rod (31) at the proximal end.

3. A mechanical interlocking mechanism for a switchgear cabinet according to claim 2, characterized in that: The baffle (1) and the head locking tongue (2) are provided with a through groove (5) in communication and used for circumferential rotation of the clamping pin (33), and the head locking tongue (2) is provided with an arc-shaped blocking block (6) at the outer end and closing one side of the through groove (5). The arc-shaped blocking block (6) is used for preventing the clamping pin (33) from being excessively deviated.

4. A mechanical interlocking mechanism for a switchgear according to claim 3, characterized in that: The first fixing unit includes a magnetic block (41) arranged on the baffle (1) and placed on the upper side of the through groove (5), and a slot block (42) symmetrically arranged at the lower part of the magnetic block (41).

5. A mechanical interlocking mechanism for switchgear according to claim 4, characterized in that: The second fixing unit includes a metal slot (411) arranged on the head locking tongue (2) and adapted to the magnetic block (41), and a plug (421) symmetrically arranged at the lower part of the metal slot (411) and adapted to the slot block (42).

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