CN217607318U - Medium-voltage switch cabinet - Google Patents

Abstract

The utility model discloses a medium voltage switchgear, including casing, switch function handcart, current transformer and earthing switch, the upper end of casing is equipped with the terminal, the front end of casing is connected with the door plant, the lock is installed to the outer end of door plant, the inside rear end of casing is equipped with a contact baffle, the rear portion distribution of casing has a contact, the outside of a contact is equipped with a contact box, the below of a contact is equipped with connects the copper bar, current transformer locates the below of connecting the copper bar, the switch function handcart is located the inside middle-end of casing, the bottom rear end of casing is connected with insulating conducting rod, the middle-end of insulating conducting rod is equipped with low pressure punching current transformer. This medium voltage switchgear, conductive loop is short, and it is little to generate heat, and the interlocking is simple reliable, prevents the maloperation, makes the major loop integrative, but the exclusive use supplies user load control, can conveniently install at the inside cubical switchboard that constitutes of shell, forms the system function.

Description

Medium-voltage switch cabinet

Technical Field

The utility model relates to a cubical switchboard technical field specifically is a medium voltage switchgear.

Background

The medium-voltage switch cabinet is a complete set of functional devices which are provided with a circuit breaker, a current transformer, a grounding switch, a bus and the like which are arranged inside a metal closed shell, realize the control, distribution and protection of a circuit and are relatively popularized in the power distribution network.

At present, the following problems exist in the existing medium-voltage switch cabinet: the switch cabinet is complex in configuration, lack of flexibility, unreliable in mechanical interlocking, difficult in engineering configuration, complex in component installation, easy to cause misoperation in the working process and high in power consumption of a conductive circuit. For this reason, a corresponding technical scheme needs to be designed for solution.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a medium voltage switchgear has solved the configuration complicacy, lacks the flexibility, and mechanical interlocking is unreliable, causes the engineering configuration difficulty, and the components and parts installation is complicated to easily cause the maloperation in the course of the work, the big technical problem of conductive circuit consumed power.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a medium voltage switchgear, includes casing, switch function handcart, current transformer and earthing switch, the upper end of casing is equipped with the terminal, the front end of casing is connected with the door plant, the lock is installed to the outer end of door plant, the inside rear end of casing is equipped with a contact baffle, the rear portion of casing distributes and has a contact, the outside of a contact is equipped with a contact box, the below of a contact is equipped with the connection copper bar, current transformer locates the below of connecting the copper bar, the switch function handcart is located the inside middle-end of casing, the below of switch function handcart is equipped with the guide rail, the outer end sliding connection of guide rail has the earthing switch operating axis, earthing switch locates the below of guide rail, the inside front end of casing is equipped with the secondary contact, the bottom rear end of casing is connected with insulating conducting rod, the middle-end of insulating rod is equipped with low pressure punching current transformer.

Preferably, the lower extreme of door plant is equipped with the observation hole, the inside in observation hole is equipped with the function handcart and shakes into the hole, the lateral part that the hole was shaken to the function handcart is connected with function handcart and shakes into hole baffle handle.

Preferably, the right part of the lower end of the door panel is provided with an earthing switch operation hole, and the side part of the earthing switch operation hole is connected with an earthing switch operation hole baffle handle.

Preferably, the top of the inner side of the door panel is provided with an upper door locking plate, the bottom of the upper door locking plate is provided with an upper hook plate, the bottom of the inner side of the door panel is provided with a lower door locking plate, and the bottom of the lower door locking plate is provided with a lower hook plate.

Preferably, two ends of the interior of the door panel are provided with two side lock pin plates, and the end parts of the two side lock pin plates are provided with a pin hook plate.

Preferably, the inboard of door plant is equipped with functional handcart hole baffle, the below of functional handcart hole baffle is equipped with ground connection operation hole baffle, the inside front end both sides of casing are equipped with earthing switch operation axle fixed block, the outside of earthing switch operation axle fixed block is equipped with earthing switch operation stop shaft, the lower extreme outside welding of earthing switch operation axle fixed block has the spring, the outside of spring is connected with earthing switch closing operation interlocking lever, the inboard of earthing switch operation axle fixed block is equipped with the limiting plate, the fixed earthing switch operation axle location that is equipped with between the limiting plate, the below fixed distribution of earthing switch operation axle location has earthing switch operation lock door turning arm, the bottom of earthing switch operation lock door turning arm is equipped with auxiliary switch, auxiliary switch's top is connected with earthing switch position auxiliary switch clamp plate, auxiliary switch's lateral part is equipped with even board, the lower extreme of even board is equipped with colludes the board.

Preferably, the rear end of the inner side of the door plate is rotatably connected with a pressing plate shaft, and the outer end of the pressing plate shaft is connected with a handcart position interlocking pressing plate.

(III) advantageous effects

This medium voltage switchgear adopts above-mentioned casing and its internal functional unit to constitute medium voltage switch functional module, has that conductive loop is short, and it is little to generate heat, and earthing switch is simple reliable with the interlocking of function handcart, prevents the maloperation, makes the major loop integrative, can the exclusive use supply user load control, also can conveniently install at the inside cubical switchboard that constitutes of shell, forms system's function, integrated design, compact structure, the installation is easy.

Drawings

FIG. 1 is a schematic view of the overall external three-dimensional structure of the present invention;

fig. 2 is a schematic diagram of the mechanical interlock of the ground switch closing position of the present invention;

fig. 3 is a schematic diagram of the mechanical interlock of the ground switch opening position of the present invention;

fig. 4 is a schematic diagram of the interlocking position of the functional handcart of the utility model;

fig. 5 is the schematic diagram of the position of the low-voltage feedthrough current transformer of the present invention.

In the figure, 1, a housing; 2. a terminal; 3. a door panel; 4. a door lock; 5. an observation hole; 6. the functional handcart is shaken into the hole; 7. a functional handcart is shaken into a hole baffle handle; 8. a primary contact baffle; 9. a primary contact; 10. a functional handcart is switched on and off; 11. a primary contact box; 12. connecting the copper bars; 13. a current transformer; 14. a guide rail; 15. a ground switch operating shaft; 16. a grounding switch; 17. a baffle handle of an operation hole of the grounding switch; 18. an earthing switch operation hole; 19. a secondary contact;

21. a door upper lock plate; 22. an upper hook plate; 23. lock pin plates at two sides of the door; 24. a pin hook plate; 25 lower door locking plate; 26. a lower hook plate; 27. the grounding switch closes the door and operates the interlocking lever; 28. a spring; 29. a limiting plate; 30. a grounding switch operating shaft fixing block;

31. a grounding switch operating stop shaft; 32. positioning an operating shaft of the grounding switch; 33. the grounding switch operates the door locking crank arm; 34. the auxiliary switch pressing plate is arranged at the position of the grounding switch; 35. an auxiliary switch; 36. connecting plates; 37. hooking the plate; 38. a functional handcart hole baffle 39 and a grounding operation hole baffle;

41. the handcart position interlocks the clamp plate; 42. a platen shaft;

51. an insulating conductive rod; 52. a low-voltage feed-through current transformer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 5, an embodiment of the present invention provides a technical solution: the utility model provides a medium voltage switchgear, which comprises a housin 1, switch function handcart 10, current transformer 13 and earthing switch 16, the upper end of casing 1 is equipped with terminal 2, the front end of casing 1 is connected with door plant 3, door lock 4 is installed to door plant 3's outer end, the inside rear end of casing 1 is equipped with primary contact baffle 8, the rear portion of casing 1 distributes and has primary contact 9, primary contact 9's outside is equipped with primary contact box 11, primary contact 9's below is equipped with connects copper bar 12, current transformer 13 locates the below of connecting copper bar 12, switch function handcart 10 locates the inside middle-end of casing 1, switch function handcart 10's below is equipped with guide rail 14, the outer end sliding connection of guide rail 14 has earthing switch operating shaft 15, earthing switch 16 locates the below of guide rail 14, the inside front end of casing 1 is equipped with secondary contact 19, the bottom rear end of casing 1 is connected with insulating conducting rod 51, the middle-end of insulating conducting rod 51 is equipped with low pressure punch-through formula current transformer 52.

In a further improvement, the lower end of the door plate 3 is provided with an observation hole 5, a functional handcart shaking-in hole 6 is arranged inside the observation hole 5, and the side part of the functional handcart shaking-in hole 6 is connected with a functional handcart shaking-in hole baffle handle 7; the right part of the lower end of the door panel 3 is provided with a grounding switch operation hole 18, and the side part of the grounding switch operation hole 18 is connected with a baffle handle 17 of the grounding switch operation hole; the top of the inner side of the door plate 3 is provided with an upper door locking plate 21, the bottom of the upper door locking plate 21 is provided with an upper hook plate 22, the bottom of the inner side of the door plate 3 is provided with a lower door locking plate 25, and the bottom of the lower door locking plate 25 is provided with a lower hook plate 26; two ends of the interior of the door plate 3 are provided with two door side lock pin plates 23, and the end parts of the two door side lock pin plates 23 are provided with pin hook plates 24; a functional handcart hole baffle 38 is arranged on the inner side of the door plate 3, a grounding operation hole baffle 39 is arranged below the functional handcart hole baffle 38, grounding switch operation shaft fixing blocks 30 are arranged on two sides of the front end in the shell 1, a grounding switch operation baffle shaft 31 is arranged on the outer sides of the grounding switch operation shaft fixing blocks 30, a spring 28 is welded on the outer side of the lower end of each grounding switch operation shaft fixing block 30, a grounding switch door closing operation interlocking rod 27 is connected to the outer side of each spring 28, a limiting plate 29 is arranged on the inner side of each grounding switch operation shaft fixing block 30, a grounding switch operation shaft positioning 32 is fixedly arranged between the limiting plates 29, a grounding switch operation locking connecting lever 33 is fixedly distributed below the grounding switch operation shaft positioning 32, an auxiliary switch 35 is arranged at the bottom of the grounding switch operation locking lever 33, an auxiliary switch 35 is connected to the top of the auxiliary switch 35, a grounding switch position auxiliary switch pressing plate 34 is connected to the side of the auxiliary switch 35, a connecting plate 36 is arranged at the side of the connecting lever 36, and a hook plate 37 is arranged at the lower end of the connecting plate 36; the inboard rear end of door plant 3 rotates and is connected with clamp plate axle 42, and the outer end of clamp plate axle 42 is connected with handcart position interlocking clamp plate 41, and a door plant promotes the formula and opens the door, and the four sides is locked, has high protection level, bears the impact of inside electric arc fault.

The interior of the circuit breaker comprises a switch function handcart guide rail, a protection valve and a primary contact system, the module current transformer is directly arranged below a primary contact, the grounding switch 16 and an operation interlocking mechanism thereof are arranged at the lower part of a circuit breaker compartment, and the operation interlocking mechanism realizes mechanical interlocking of the function handcart and the grounding switch through an operation hole baffle plate arranged on a compartment door plate; the module comprises an upper compartment and a lower compartment, the lower compartment is provided with a grounding switch and an operating mechanism thereof, the upper compartment and the lower compartment adopt a door plate, and a mechanical linkage is arranged on the door; when the breaker returns to the test position, the grounding switch can be switched on, and after the grounding switch is switched on, the compartment door can be opened; the grounding switch is opened, the circuit breaker operation hole is blocked, and the circuit breaker can not be swung to the working position; the door plate of the switch room adopts a lifting type opening mechanism, the handle of the door lock is rotated clockwise, the door is lifted, the door lock bolt is separated from the hook plate of the cabinet body, and the door can be opened; when the cabinet is closed, the door plate is closed and then descends, the lock bolts on two sides enter the grooves of the cabinet body, and the upper bent plate and the lower bent plate are hooked with the cabinet body plate to realize four-side sealing and resist internal arc faults; the switch chamber can be provided with a vacuum circuit breaker, an isolation handcart, a metering handcart and other functional handcarts; the current transformer 13 is directly connected with the primary contact 9, the connection distance is short, the current transformer 13 can also adopt a low-voltage straight-through current transformer 52, and the structure is simple; the interlocking device is arranged on the door panel, and after the grounding switch 16 is switched on, the baffle of the operating hole of the grounding switch cannot be closed, so that the operating hole of the functional handcart cannot be opened; after the switching function handcart 10 leaves a test position, the pressing plate prevents the grounding switch operation hole baffle from being opened, so that the grounding switch cannot be switched off; only under the condition of closing the door, the handcart 10 with the switch function can be shaken in and out, and the grounding switch 16 can be switched on and off, so that the safety of operators is ensured; the secondary wiring of the switching function handcart 10, the wiring of the current transformer 13 and the auxiliary contact wiring at the position of the grounding switch 16 are connected to the wiring terminal 2 at the top of the module, so that the connection of customers is facilitated

The door plate of the shell adopts a lifting structure, the handle of the door lock 4 rotates anticlockwise, meanwhile, the door plate 3 is lifted upwards, the door lock pin 23 is separated from the hook plate 24 and can open the door, the door is closed when the door is closed, the door handle is rotated clockwise, the door lock pin 23 is hooked with the hook plate 24, and the upper lock plate 21 is hooked with the hook plate 22; the lower locking plate 25 and the hook plate 26 are hooked tightly, the four sides are locked, and the strength is high.

The switch function handcart 10 can be shaken into a working position, the contact baffle is opened, the primary contact 9 and the secondary contact 19 are all connected, current enters from the upper contact 9, passes through the switch 10 and enters the lower contact, and is connected to the current transformer 13 through the copper bar 12, and then is led out through the current transformer, so that a user load can be connected, and the lower part of the current transformer is also connected to the grounding switch 16, so that the grounding protection is realized during the maintenance of a user.

The current signal that current transformer 13 surveyed is connected to 2 on the terminal row that is located the module top through the end electric wire, and switch module's control is arranged to secondary contact 19 to the switch by module roof terminal, realizes the control to the switch, and complete integrated design, the function of cubical switchboard is realized to a module. The current transformer may be a low voltage feed-through current transformer 52 that performs a current measurement function through the insulated conductive rod 51.

The functional module is provided with the active mechanical interlocking, when the grounding switch is switched on, the grounding switch operation baffle shaft 31 prevents the grounding operation hole baffle 39 from moving towards the right side, and the baffle is bent to prevent the functional handcart operation hole baffle 38 from moving towards the right side to be opened, so that the switch can not be inserted into the switch to be shaken out or into the switch by shaking in the handle. When the grounding switch is switched off, the grounding switch operation blocking shaft 31 rotates away, the grounding operation hole baffle 39 can be closed, and the functional handcart hole baffle 38 can be opened.

The earthing switch is opened, the connecting plate 36 is driven by the earthing switch to operate the door locking crank arm 33 to move upwards, the hook plate 37 is pulled to rotate, the hook plate hooks the door panel locking hook, and at the moment, the compartment door panel cannot be opened.

The handcart position interlocking pressing plate 41 is arranged on a bottom plate of the switch compartment and can rotate around a pressing plate shaft 42, when the switch is at a test position, the front end of the pressing plate is downward by gravity, when the switch is shaken inwards, the handcart position interlocking pressing plate 41 rotates around a shaft, the front end is lifted up to block the baffle 39 of the grounding operation hole from moving leftwards to open the baffle, the grounding switch operation shaft cannot be inserted, and the grounding switch cannot be switched on;

the door of the compartment is opened, the grounding switch cannot be opened, a grounding switch closing operation interlocking rod 27 is arranged on a grounding switch operation shaft fixing block 30, a spring 28 is arranged on the interlocking rod, the interlocking rod is compressed towards the door direction, the grounding switch closing operation interlocking rod 27 cannot be pressed in, the square surface of a positioning 32 of the grounding switch operation shaft is prevented from rotating by a limiting plate 29 connected with the interlocking rod, the grounding switch 16 cannot be operated, and after the door plate is closed, the limiting plate 29 is inwards arranged to the circular surface of the positioning sleeve, and the grounding switch 16 can be operated.

A stop block is arranged on the switch shaking hole, and the switch can be operated only when the door plate is closed.

Therefore, the utility model adopts the above structure of a switch function module, simple arrangement, short conductive loop length, integrated structure, integral mechanical interlocking, prevention of operation through the operation hole baffle plate to realize interlocking, after the earthing switch is switched on, the operation hole of the switch function handcart is blocked, the handcart cannot be operated, the handcart leaves the test position, the earthing switch operation hole baffle plate cannot be opened, and the earthing switch cannot be switched off; the simple module is mounted in the housing to form the power supply apparatus.

The utility model discloses a part is the parts that general standard component or technical staff in the field know, and its structure and principle all are this technical staff all can learn through the technical manual or learn through conventional experimental method, the utility model provides a problem is that the configuration is complicated, lacks the flexibility, and mechanical interlocking is unreliable, causes the engineering configuration difficulty, and components and parts installation is complicated to easily cause the maloperation in the working process, conductive loop consumed power is big, the utility model discloses a combination of each other of above-mentioned parts, cubical switchboard contain function handcart, current transformer, earthing switch and operation interlocking device, current transformer directly in the contact lower part, connect copper bar distance weak point, it is little to generate heat, upper portion installation function handcart, lower part installation earthing switch, a door plant, active mechanical interlocking prevents the maloperation, makes the major loop integrative, can the exclusive use supply user load control, also can conveniently install the cubical switchboard of constituteing inside the shell in the shell, form system function.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. The utility model provides a medium voltage switchgear, includes casing (1), switch function handcart (10), current transformer (13) and earthing switch (16), its characterized in that: the upper end of casing (1) is equipped with terminal (2), the front end of casing (1) is connected with door plant (3), lock (4) are installed to the outer end of door plant (3), the inside rear end of casing (1) is equipped with one time contact baffle (8), the rear portion of casing (1) distributes has one time contact (9), the outside of one time contact (9) is equipped with one time contact box (11), the below of one time contact (9) is equipped with connects copper bar (12), the below of connecting copper bar (12) is located in current transformer (13), switch function handcart (10) are located the inside middle end of casing (1), the below of switch function handcart (10) is equipped with guide rail (14), the outer end sliding connection of guide rail (14) has earthing switch operating axis (15), the below of guide rail (14) is located in earthing switch (16), the inside front end of casing (1) is equipped with secondary contact (19), the bottom rear end of casing (1) is connected with insulating conducting rod (51), the middle end of insulating conducting rod (51) is equipped with low pressure current transformer (52).

2. Medium voltage switchgear, according to claim 1, characterized in that: the lower extreme of door plant (3) is equipped with observation hole (5), the inside of observing hole (5) is equipped with function handcart and shakes into hole (6), the lateral part that the hole (6) was shaken to the function handcart is connected with function handcart and shakes into hole baffle handle (7).

3. Medium voltage switchgear, according to claim 1, characterized in that: the lower extreme right part of door plant (3) is equipped with earthing switch operation hole (18), the lateral part in earthing switch operation hole (18) is connected with earthing switch operation hole baffle handle (17).

4. Medium voltage switchgear, according to claim 1, characterized in that: the door is characterized in that an upper door locking plate (21) is arranged at the top of the inner side of the door plate (3), an upper hook plate (22) is arranged at the bottom of the upper door locking plate (21), a lower door locking plate (25) is arranged at the bottom of the inner side of the door plate (3), and a lower hook plate (26) is arranged at the bottom of the lower door locking plate (25).

5. Medium voltage switchgear, according to claim 1, characterized in that: two ends of the interior of the door plate (3) are provided with two side lock pin plates (23), and the end parts of the two side lock pin plates (23) are provided with pin hook plates (24).

6. Medium voltage switchgear, according to claim 1, characterized in that: the inboard of door plant (3) is equipped with functional handcart hole baffle (38), the below of functional handcart hole baffle (38) is equipped with earthing operation hole baffle (39), the inside front end both sides of casing (1) are equipped with earthing switch operation axle fixed block (30), the outside of earthing switch operation axle fixed block (30) is equipped with earthing switch operation stop shaft (31), the lower extreme outside welding of earthing switch operation axle fixed block (30) has spring (28), the outside of spring (28) is connected with earthing switch and closes door operation interlocking lever (27), the inboard of earthing switch operation axle fixed block (30) is equipped with limiting plate (29), the fixed earthing switch operation axle location (32) that is equipped with between limiting plate (29), the below fixed distribution of earthing switch operation axle location (32) has earthing switch operation lock door turning arm (33), the bottom of earthing switch operation lock door arm (33) is equipped with auxiliary switch (35), the top of auxiliary switch (35) is connected with earthing switch position auxiliary switch clamp plate (34), the lateral part of auxiliary switch operation axle location (35) is equipped with even turning plate (36), even lower extreme (37) that turning plate (36) is equipped with.

7. Medium voltage switchgear, according to claim 1, characterized in that: the rear end of the inner side of the door panel (3) is rotatably connected with a pressing plate shaft (42), and the outer end of the pressing plate shaft (42) is connected with a handcart position interlocking pressing plate (41).

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