Small quick air bypass switch

Abstract

The utility model discloses a small-sized rapid air bypass switch, which comprises an insulating shell and an insulating cover body which are fixedly connected through a bolt, one side of the insulating cover body is fixedly connected with a cable fixing head, a static copper bar and a soft copper bar are arranged in the insulating shell, and a manual opening mechanism and a pulse electromagnetic limiting mechanism which are vertically distributed are arranged in the insulating shell. One end of the static copper bar is fixedly connected with the insulating shell, the soft copper bar is fixedly connected with the manual opening mechanism, and the other ends of the static copper bar and the soft copper bar extend out of the insulating shell. The bypass switch has the advantages that the overall closing operation speed is high, the service life is long, damage is not prone to occurring, the number of parts used for the bypass switch is greatly reduced, the mechanical structure is simple, the assembly process is convenient, the production cost of the bypass switch is reduced, the mechanical structure between the parts is more stable, the service life of the bypass switch is effectively guaranteed, and the service life of the bypass switch is prolonged. And meanwhile, the use reliability of the bypass switch is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of power electronic fast closing equipment, and in particular relates to a small fast air bypass switch. Background Art

[0002] In the field of power electronics, especially in the field of high and low voltage reactive compensation devices and flexible DC transmission and distribution, when the core component power module fails, it will cause the equipment to shut down or be damaged, and it will be unable to continue to provide reactive regulation to the power grid, resulting in economic losses or safety accidents. Therefore, when the power module fails, the control board of the module will determine the fault situation. If the bypass needs to be triggered, it will report to the system, and the system will be temporarily shut down. At this time, the bypass switch needs to be quickly closed to short-circuit the fault module. After the bypass switch is closed, the machine remains in the closed state, and the normally open contacts of the bypass switch are closed. After the feedback signal is transmitted to the system, the system will be restarted, and the system current will flow through the bypass switch, and the equipment can continue to operate reliably.

[0003] At present, the bypass switches used in the market are mainly permanent magnet vacuum structures. The permanent magnet mechanism of the bypass switch is large in size and high in cost due to the installation of permanent magnets. The bypass switch is equipped with a vacuum interrupter, which has the advantages of long life and strong resistance to melting welding, but also has the disadvantages of large size and high cost. In addition, once the vacuum interrupter inside the bypass switch has quality problems, the bypass switch will completely fail, so the reliability of the vacuum interrupter is very important.

[0004] As the market demand for high and low voltage SVG devices increases, more and more companies are competing, and cost and quality are the key to occupying the market. Each set of high and low voltage SVG devices is equipped with more than 100 bypass switches. The existing bypass switches are all equipped with vacuum interrupters and permanent magnets, which not only have a slow production cycle and high costs, but also have a high probability of quality problems, which is not conducive to market competition.

[0005] The invention with the existing authorization announcement number CN113903605A discloses a new bypass switch, in which the flow-through part adopts an aluminum bar and a finger spring, and the closing operation is realized by cooperating with a reset lever and a trip lever, and the opening operation is realized by adjusting the positions of the reset lever and the trip lever through a manual push rotation mechanism. The reset lever and the trip lever are easily damaged after long-term use. The bypass switch has the problems of large size, limited flow capacity, many parts and complex structure, complicated assembly process, high cost and low reliability. Utility Model Content

[0006] The utility model aims to provide a small fast air bypass switch to solve the problems in the prior art that the bypass reset lever component is easy to be damaged, the bypass switch is large in size, has limited flow capacity, has many parts, has a complex structure, has a cumbersome assembly process, is high in cost, and has low reliability.

[0007] To achieve the above-mentioned purpose, the technical solution of the utility model is: a small fast air bypass switch, comprising an insulating shell and an insulating cover body fixedly connected by bolts, a cable fixing head is fixedly connected to one side of the insulating cover body, a static copper bar and a soft copper bar are arranged in the insulating shell, a vertically distributed manual opening mechanism and a pulse electromagnetic limit mechanism are arranged in the insulating shell, one end of the static copper bar is fixedly connected to the insulating shell, the soft copper bar is fixedly connected to the manual opening mechanism, and the other ends of the static copper bar and the soft copper bar are extended and arranged outside the insulating shell;

[0008] The manual trip mechanism comprises a contact, an insulator, a tripping block and a tripping screw which are connected in sequence. The contact, the insulator and the tripping block are fixedly connected by stud bolts. One side of the contact is fixedly connected to the end of the soft copper bar by the stud bolts. The contact is fixedly connected to the insulating housing by a clamp. One side of the tripping block is threadedly connected to the tripping screw. A closing spring is sleeved in the insulator. One end of the closing spring is clamped in the groove of the insulator, and the other end is pressed against the groove in the insulating housing. The end of the tripping screw is fixedly connected to a first washer by a bolt.

[0009] The pulse electromagnetic limiting mechanism includes a magnetic cylinder, a magnetic ring, a magnetic ring seat, a coil skeleton, a coil and a tripping rod. The magnetic ring seat is fixedly connected to the insulating shell by bolts. The magnetic cylinder is mounted on the magnetic ring seat. The end of the magnetic cylinder is fixedly connected to the magnetic ring. The magnetic ring seat is mounted with a coil skeleton. The coil is wound and mounted on the coil skeleton. A tripping rod is magnetically attracted in the magnetic ring. A magnetic attraction block is fixedly connected to the top of the tripping rod. The tripping rod passes through the tripping block and extends to the bottom of the tripping block. A limiting ring adapted to the tripping block is fixedly connected to the middle part of the tripping rod. The bottom end of the tripping rod is fixedly connected to a second washer by bolts. A tripping spring is mounted on the bottom of the tripping rod. One end of the tripping spring rests on the second washer, and the other end rests on a groove in the insulating shell.

[0010] Preferably, a pressure plate is provided on one side of the release block, the pressure plate is fixedly connected to the release block through a gate opening screw, a travel switch is provided on one side of the pressure plate, the elastic sheet of the travel switch contacts the pressure plate, and the travel switch is fixedly connected to the insulating housing.

[0011] Preferably, the release stopper is provided with a boss which cooperates with the limiting ring.

[0012] Preferably, a through hole is provided at a position at the bottom of the insulating shell corresponding to the tripping rod, and a plug is movably connected in the through hole.

[0013] Preferably, sealing rings are provided at the connection parts between the static copper busbar, the soft copper busbar and the insulating shell.

[0014] Preferably, a sealing ring is provided at the connection portion between the opening screw and the insulating housing.

[0015] Preferably, a gate-opening marking groove is provided at the end of the gate-opening screw.

[0016] Preferably, the static copper busbar has a right-angle structure, and a rivet nut is fixedly connected to the surface of one side of the static copper busbar extending out of the insulating shell, a copper busbar boss is provided on the insulating shell, and the part of the soft copper busbar extending out of the insulating shell is fixed to the copper busbar boss by bolts.

[0017] Preferably, the coil and the travel switch are connected to the user control system via a cable, and the cable extends out of the insulating cover through a cable fixing head.

[0018] The advantages of the utility model are:

[0019] 1. Through the cooperation of the pulse electromagnetic limit mechanism and the manual opening mechanism, when the coil in the electromagnet receives the closing pulse electrical signal, the electromagnet generates magnetic field attraction, the trip spring changes from the normal state to the compressed state, the trip rod is quickly attracted in the electromagnet, the limit ring no longer limits the trip block, and the trip is successfully tripped. At the same time, the closing spring changes from the compressed state to the normal state. Under the action of the closing spring, the contact is connected to the static copper bar, and the main circuit completes the closing operation. The overall closing operation is fast, the service life is long, and it is not easy to be damaged;

[0020] 2. When the opening operation is required, the special opening wrench is placed between the first washer and the insulating housing, and the opening operation is performed using the lever principle. During the prying process of the special opening wrench, the closing spring changes from a normal state to a compressed state, and the contact is no longer connected to the static copper bar. At the same time, the tripping spring changes from a compressed state to a normal state. Under the action of the tripping spring, the tripping rod is reset, and the limit ring is again engaged on one side of the tripping block. The boss limits the limit ring, and the main circuit completes the opening operation. The opening operation speed is fast;

[0021] 3. The bypass switch cooperates with the cross-distributed manual opening mechanism and the pulse electromagnetic limit mechanism, which greatly reduces the number of parts used in the bypass switch. The mechanical structure is simple and the assembly process is convenient, which reduces the production cost of the bypass switch. The mechanical structure between the parts is more stable, which effectively guarantees the service life of the bypass switch and the reliability of the bypass switch during use.

[0022] 4. The air bypass switch has no vacuum interrupter, and the insulating medium is air. The electrical performance is ensured by increasing the electrical clearance and creepage distance, and good seals are used to ensure the electrical environment. The permanent magnet is removed by setting a pulse electromagnetic limit mechanism. The production cycle is fast and the cost is low, which is conducive to market competition. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the mechanism of the present utility model.

[0024] Figure 2 It is a schematic diagram of the top structure of the utility model.

[0025] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-sectional structure of AA.

[0026] Figure 4 It is a schematic diagram of the internal structure of the utility model in the open state.

[0027] Figure 5 It is a schematic diagram of the internal structure of the utility model in the closed state.

[0028] The meanings of the reference numerals are as follows: insulating housing (1), insulating cover (2), cable fixing head (3), static copper busbar (4), soft copper busbar (5), contact (6), insulator (7), tripping block (8), tripping screw (9), stud bolt (10), clamp (11), closing spring (12), first washer (13), magnetic cylinder (14), magnetic ring (15), magnetic ring seat (16), coil skeleton (17), coil (18), tripping rod (19), magnetic suction block (20), limiting ring (21), second washer (22), tripping spring (23), pressure plate (24), travel switch (25), elastic sheet (26), boss (27), through hole (28), plug (29), sealing ring (30), sealing ring (31), tripping marking groove (32), rivet nut (33), copper busbar boss (34). DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0030] like Figures 1 to 5 A small-sized fast air bypass switch shown in the figure comprises an insulating housing 1 and an insulating cover 2 fixedly connected by bolts, a cable fixing head 3 is fixedly connected to one side of the insulating cover 2, a static copper bar 4 and a soft copper bar 5 are arranged in the insulating housing 1, a vertically distributed manual opening mechanism and a pulse electromagnetic limit mechanism are arranged in the insulating housing 1, one end of the static copper bar 4 is fixedly connected to the insulating housing 1, the soft copper bar 5 is fixedly connected to the manual opening mechanism, and the other ends of the static copper bar 4 and the soft copper bar 5 are extended and arranged outside the insulating housing 1;

[0031] The manual trip mechanism comprises a contact 6, an insulator 7, a tripping block 8 and a tripping screw 9 which are connected in sequence. The contact 6, the insulator 7 and the tripping block 8 are fixedly connected by a stud bolt 10. One side of the contact 6 is fixedly connected to the end of the soft copper bar 5 by the stud bolt 10. The contact 6 is fixedly connected to the insulating housing 1 by a clamp 11. The clamp 11 guides and limits the displacement of the contact 6. One side of the tripping block 8 is threadedly connected to the tripping screw 9. A closing spring 12 is sleeved in the insulator 7. One end of the closing spring 12 is clamped in a groove of the insulator 7, and the other end is pressed against a groove in the insulating housing (1). The end of the tripping screw 9 is fixedly connected to a first washer 13 by a bolt.

[0032] The pulse electromagnetic limiting mechanism includes a magnetic cylinder 14, a magnetic ring 15, a magnetic ring seat 16, a coil skeleton 17, a coil 18 and a tripping rod 19. The magnetic ring seat 16 is fixedly connected to the insulating shell 1 by bolts. The magnetic cylinder 14 is mounted on the magnetic ring seat 16. The end of the magnetic cylinder 14 is fixedly connected with the magnetic ring 15. The magnetic ring seat 16 is mounted with a coil skeleton 17. The coil 18 is wound and mounted on the coil skeleton 17. A tripping rod 19 is magnetically attracted in the magnetic ring 15. A magnetic attraction block 20 is fixedly connected to the top of the tripping rod 19. The tripping rod 19 passes through the tripping block 8 and is extended to the bottom of the tripping block 8. A limiting ring 21 adapted to the tripping block 8 is fixedly connected to the middle part of the tripping rod 19. The bottom end of the tripping rod 19 is fixedly connected with a second washer 22 by bolts. A tripping spring 23 is mounted on the bottom of the tripping rod 19. One end of the tripping spring 23 rests on the second washer 22, and the other end rests on the groove in the insulating shell 1.

[0033] like Figure 3 , Figure 4 and Figure 5 As shown, in order to facilitate the user control system to detect whether the bypass switch is in the closed state, a pressure plate 24 is provided on one side of the trip block 8, and the pressure plate 24 is fixedly connected to the trip block 8 through the opening screw 9. A travel switch 25 is provided on one side of the pressure plate 24, and the elastic sheet 26 of the travel switch 25 is in contact with the pressure plate 24. The travel switch 24 is fixedly connected to the insulating shell 1. When the bypass switch is in the closed state, the elastic sheet 26 of the travel switch 25 is in the open state, and the travel switch 25 will not send a signal to the user control system. When the bypass switch is in the open state, the elastic sheet 26 of the travel switch 25 is in the closed state under the action of the pressure plate 24, and the travel switch 25 sends a signal to the user control system, which is convenient for the staff to observe the closing and opening states of the bypass switch.

[0034] like Figure 3 , Figure 4 and Figure 5As shown, in order to facilitate better cooperation between the trip block 8 and the trip rod 19 and further improve the limiting effect of the limit ring 21 on the trip block 8, a boss 27 matching the limit ring 21 is provided on the trip block 8. When the bypass switch is in the closed state, the limit ring 21 no longer limits the boss 27 of the trip block 8, and the limit ring 21 is at the top of the trip block 8. When the bypass switch is in the open state, the limit ring 21 presses against one side of the boss 27 of the trip block 8 to form a mechanical engagement, which limits the trip block 8 and makes the contact 6 no longer connected to the static copper bus 4.

[0035] like Figure 3 As shown, when the electromagnetic mechanism of the bypass switch fails, it is convenient for the staff to manually adjust the closing state. At the same time, the insulating housing 1 is treated with dust and water proofing. A through hole 28 is opened at a position corresponding to the trip rod 19 at the bottom of the insulating housing 1. A plug 29 is movably connected in the through hole 28. After removing the plug 29, the staff uses a screwdriver to reach into the through hole 28 and push the trip rod 19 to move upward to realize the manual closing operation.

[0036] like Figures 1 to 5 As shown, in order to ensure the airtightness of the bypass switch and to achieve dustproof and waterproof effects, a sealing ring 30 is provided at the connection between the static copper bar 4, the soft copper bar 5 and the insulating housing 1.

[0037] like Figure 3 , Figure 4 , Figure 5 As shown, in order to ensure the airtightness between the opening screw 9 and the insulating housing 1 , a sealing ring 31 is provided at the connection portion between the opening screw 9 and the insulating housing 1 .

[0038] In order to facilitate the staff to observe whether the bypass switch is in the open state, an open marking groove 32 is opened at the end of the open screw 9. When the open marking groove 32 is located inside the insulating shell 1 and the open marking groove 32 cannot be observed, the bypass switch is in the closed state. When the open marking groove 32 is located outside the insulating shell 1 and the open marking groove 32 can be clearly observed, the bypass switch is in the open state.

[0039] like Figures 1 to 5 As shown, in order to facilitate the installation and fixation of the static copper busbar 4 and the soft copper busbar 5, the static copper busbar 4 is arranged in a right-angle structure, and a rivet nut 33 is fixedly connected to the surface of one side of the static copper busbar 4 extending out of the insulating shell 1, and a copper busbar boss 34 is provided on the insulating shell 1, and the part of the soft copper busbar 5 extending out of the insulating shell 1 is fixed to the copper busbar boss 34 by bolts.

[0040] like Figure 1 , Figure 2 and Figure 3As shown, in order to facilitate the transmission of pulse electrical signals and feedback signals, the coil 18 and the travel switch 25 are connected to the user control system through a cable, and the cable extends out of the insulating cover 2 through the cable fixing head 3. The cable fixing head 3 plays the role of dustproof, waterproof and cable restraint.

[0041] The working process of the utility model is:

[0042] The triggering principle of closing the switch, when the bypass switch is in the opening state, the tripping rod 19 is integrally processed, the limit ring 21 conflicts with the boss 27 of the tripping block 8, and the limit ring 21 limits the tripping block 8. The opening marking groove 32 can be directly observed outside the insulating shell 1, the closing spring 12 is in a compressed state, and the tripping spring 23 is in a normal state. When the power module fails, after system judgment, if the bypass switch needs to be triggered, a pulse current signal will be sent to the coil 18. When the coil 18 in the electromagnet receives the closing pulse current signal, the electromagnet generates suction to quickly close the tripping rod 19. When the tripping rod 19 moves 2mm, the limit ring 21 is away. The boss 27 of the tripping block 8 is opened, and the tripping is successful. The tripping rod 19 continues to move for 1 mm and then is completely attracted by the electromagnet and maintains the attracted state for 0.5 seconds. At this time, the tripping spring 23 is in a compressed state under the action of the electromagnet. At the same time, the closing spring 12 changes from a compressed state to a normal state. Under the action of the closing spring 12, the insulator 7 and the contact 6 are pushed to move quickly toward the direction of the static copper bar 4, so that the contact 6 is connected to the static copper bar 4. At this time, the main circuit has been closed to ensure that the equipment continues to operate reliably. At this time, the limit ring 21 is reset to the top of the boss 27 under the action of the tripping spring 23, and the opening screw 9 extends into the insulating housing 1, and the opening marking groove 32 cannot be observed.

[0043] The principle of manual opening is that when the bypass switch is in the closed state, a special opening wrench is used to place it between the first gasket 13 and the insulating housing 1, and the opening operation is performed using the lever principle. In the process of prying the opening screw 9, the contact 6, the insulator 7, the tripping block 8 and the opening screw 9 move in the same direction, and the closing spring 12 gradually changes from a normal state to a compressed state. When the protrusion 27 moves to the edge position of the limit ring 21 and disengages from the limit ring 21, the tripping spring 23 changes from a compressed state to a normal state, and the tripping rod 19 is reset under the action of the tripping spring 23. The limit ring 21 collides with the tripping block 8 and makes a sound. The limit ring 21 conflicts with the boss 27 to complete the opening operation. After removing the opening wrench, the manual opening mechanism remains in the opening state, and the opening screw 9 extends from the insulating housing 1. The opening marking groove 32 can be clearly seen.

[0044] The above is only a preferred example of the present invention, and the technical solution of the present invention is not limited thereto. It should be pointed out that for ordinary technicians in this field, under the technical inspiration provided by the present invention, as common knowledge in the field, other equivalent deformations and improvements can be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A small-sized rapid air bypass switch, comprising an insulating housing (1) and an insulating cover (2) fixedly connected by bolts, wherein a cable fixing head (3) is fixedly connected to one side of the insulating cover (2), characterized in that: A static copper bar (4) and a soft copper bar (5) are arranged in the insulating housing (1); a vertically distributed manual opening mechanism and a pulse electromagnetic limit mechanism are arranged in the insulating housing (1); one end of the static copper bar (4) is fixedly connected to the insulating housing (1); the soft copper bar (5) is fixedly connected to the manual opening mechanism; and the other ends of the static copper bar (4) and the soft copper bar (5) are extended and arranged outside the insulating housing (1); The manual trip mechanism comprises a contact (6), an insulator (7), a tripping block (8) and a tripping screw (9) which are connected in sequence, wherein the contact (6), the insulator (7) and the tripping block (8) are fixedly connected via a stud bolt (10), one side of the contact (6) is fixedly connected to the end of the soft copper bar (5) via the stud bolt (10), the contact (6) is fixedly connected to the insulating housing (1) via a clamp (11), one side of the tripping block (8) is threadedly connected to the tripping screw (9), a closing spring (12) is sleeved inside the insulator (7), one end of the closing spring (12) is clamped in a groove of the insulator (7), and the other end abuts against a groove in the insulating housing (1), and the end of the tripping screw (9) is fixedly connected to a first washer (13) via a bolt; The pulse electromagnetic limiting mechanism comprises a magnetic cylinder (14), a magnetic ring (15), a magnetic ring seat (16), a coil frame (17), a coil (18) and a tripping rod (19); the magnetic ring seat (16) is fixedly connected to the insulating housing (1) by bolts; the magnetic cylinder (14) is sleeved on the magnetic ring seat (16); the end of the magnetic cylinder (14) is fixedly connected to the magnetic ring (15); the magnetic ring seat (16) is sleeved with a coil frame (17); the coil frame (17) is wound and sleeved with the coil (18); the tripping rod (19) is magnetically attracted inside the magnetic ring (15); The top of the trip rod (19) is fixedly connected to a magnetic attraction block (20); the trip rod (19) penetrates the trip block (8) and extends to the bottom of the trip block (8); the middle of the trip rod (19) is fixedly connected to a limit ring (21) that matches the trip block (8); the bottom end of the trip rod (19) is fixedly connected to a second washer (22) by bolts; the bottom of the trip rod (19) is sleeved with a trip spring (23); one end of the trip spring (23) rests on the second washer (22) and the other end rests on a groove in the insulating housing (1).

2. A small-sized rapid air bypass switch as claimed in claim 1, characterized in that: A pressure plate (24) is provided on one side of the tripping stopper (8), the pressure plate (24) being fixedly connected to the tripping stopper (8) via a gate opening screw (9), a travel switch (25) is provided on one side of the pressure plate (24), an elastic sheet (26) of the travel switch (25) is in contact with the pressure plate (24), and the travel switch (25) is fixedly connected to the insulating housing (1).

3. A small-sized rapid air bypass switch as claimed in claim 2, characterized in that: The release stopper (8) is provided with a boss (27) that matches the limiting ring (21).

4. A small-sized rapid air bypass switch as claimed in claim 3, characterized in that: A through hole (28) is provided at a position on the bottom of the insulating housing (1) corresponding to the tripping rod (19), and a plug (29) is movably connected in the through hole (28).

5. A small-sized rapid air bypass switch as claimed in claim 4, characterized in that: A sealing ring (30) is provided at the connection portion between the static copper busbar (4), the soft copper busbar (5) and the insulating housing (1).

6. A small-sized rapid air bypass switch as claimed in claim 5, characterized in that: A sealing ring (31) is provided at the connection portion between the opening screw (9) and the insulating housing (1).

7. A small-sized rapid air bypass switch as claimed in claim 6, characterized in that: An opening marking groove (32) is provided at the end of the opening screw rod (9).

8. A small-sized rapid air bypass switch as claimed in claim 7, characterized in that: The static copper busbar (4) is of a right-angle structure, and a rivet nut (33) is fixedly connected to a surface of one side of the static copper busbar (4) extending out of the insulating housing (1), a copper busbar boss (34) is provided on the insulating housing (1), and a portion of the soft copper busbar (5) extending out of the insulating housing (1) is fixed to the copper busbar boss (34) by means of bolts.

9. A small-sized rapid air bypass switch as claimed in claim 8, characterized in that: The coil (18) and the travel switch (25) are connected to a user control system via a cable, and the cable extends out of the insulating cover (2) via a cable fixing head (3).

Images