A mechanical interlocking mechanism for a dual power automatic transfer switch

Abstract

A mechanical interlocking mechanism for a dual power automatic transfer switch comprises a main operating mechanism spindle (1) and a backup operating mechanism spindle (2); the main operating mechanism spindle (1) is provided with a main mechanism cantilever (101), and the backup operating mechanism spindle (2) is provided with a backup mechanism cantilever (201); the mechanism is characterized in that: the main operating mechanism spindle (1) is also provided with a main mechanism cantilever lever (102), and the backup operating mechanism spindle (2) is also provided with a backup mechanism cantilever lever (202); the entire mechanism has a simple structure, occupies a relatively small assembly space, is more convenient to install, maintain and replace, and can also be integrated with other functional structures of the dual power automatic transfer switch to achieve modularization, thereby greatly reducing the production cost.

Description

Technical Field

[0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to a mechanical interlocking mechanism of a dual-power automatic transfer switch. Background Art

[0002] With the development of society, people's requirements for power grids and their transmission and distribution processes are gradually increasing, mainly reflected in the safety, reliability, continuity, and easy maintenance of power supply equipment. Therefore, the application of dual power automatic transfer switches with the above-mentioned typical characteristics is becoming more and more extensive; dual power automatic transfer switches can realize automatic switching between normal power supply and backup power supply in a very short time, and are especially suitable for various occasions where power supply cannot be cut off for a long time. The dual power automatic transfer switch has two independent contact systems, each of which controls the connection / disconnection of the main power supply and the backup power supply to which it is connected, and each contact system is controlled by its own operating mechanism. In actual use, the dual power automatic transfer switch allows two operating mechanisms to control their respective contact systems to be in the open and disconnected state, or one contact system is in the closed and connected state and the other contact system is in the open and disconnected state (that is, the two contact systems are not allowed to be in the closed and connected state at the same time). In normal operation, the dual power automatic transfer switch will detect and monitor the main power supply and the backup power supply. When an abnormality is detected in the power supply, it will automatically switch from the abnormal power supply to the normal power supply, so as to use the normal power supply for power supply. This requires that the dual power automatic transfer switch should be fast, stable and efficient during the conversion process between the main power supply and the backup power supply, and be equipped with corresponding interlocking devices to prevent the main / backup power supply from being connected at the same time to ensure power supply safety.

[0003] In the existing dual power automatic transfer switches, the interlocking between the two power supplies mostly adopts the shift fork technology. When closing the power on one side, a manual shift fork (also called a stopper) is used to hold the closing spindle to prevent the other side from closing. This method is mainly used for small-capacity transfer switch electrical appliances. For large-capacity transfer switch electrical appliances, due to their large operating force and large impact force during operation, if the method of holding the closing spindle or driving the interlocking device by the closing spindle is adopted, the interlocking device will be subjected to greater stress and have low reliability, resulting in a short life and a large size. Summary of the invention

[0004] The purpose of the present invention is to provide a mechanical interlocking mechanism of the dual power automatic transfer switch in view of the technical defects of the mechanical interlocking device of the existing dual power automatic transfer switch, which is weak in impact resistance and large in size. The mechanical interlocking mechanism of the dual power automatic transfer switch is connected by means of connecting rods, levers and operating mechanism cantilevers, so that when one operating mechanism drives its contact system to be in the closed state, the other operating mechanism is in and locked in the open position, thereby achieving the requirement that the main / standby contact system cannot be closed at the same time. The whole structure is simple, the assembly space occupied is relatively small, and it is more convenient to install, maintain and replace. It can also be integrated with other functional structures of the dual power automatic transfer switch to achieve modularization, and the manufacturing cost is greatly reduced.

[0005] In order to overcome the shortcomings of the mechanical interlocking device of the above-mentioned existing dual power automatic transfer switch, the present invention provides a mechanical interlocking mechanism of the dual power automatic transfer switch, which includes a main operating mechanism main shaft and a backup operating mechanism main shaft, the main operating mechanism main shaft is equipped with a main mechanism cantilever, and the backup operating mechanism main shaft is equipped with a backup mechanism cantilever, characterized in that: the main operating mechanism main shaft is also equipped with a main mechanism cantilever lever, and the backup operating mechanism main shaft is also equipped with a backup mechanism cantilever lever;

[0006] The main mechanism cantilever is linked to the upper end of the right interlocking rod, the lower end of the right interlocking rod is linked to the standby mechanism cantilever lever, the standby mechanism cantilever lever is linked to the lower opening lever, and the lower opening lever is linked to the opening half shaft of the standby mechanism;

[0007] The standby mechanism cantilever is linked to the lower end of the left interlocking rod, the upper end of the left interlocking rod is linked to the main mechanism cantilever lever, the main mechanism cantilever lever is linked to the upper opening lever, and the upper opening lever is linked to the main mechanism opening half shaft.

[0008] Furthermore, one end of the main reset spring is mounted on the right interlocking rod, and the other end is mounted on the cantilever lever of the backup mechanism; one end of the backup reset spring is mounted on the left interlocking rod, and the other end is mounted on the cantilever lever of the main mechanism.

[0009] Furthermore, the upper opening brake lever and the lower opening brake lever are provided with springs or springs, and the springs or springs are against the base.

[0010] Furthermore, the main mechanism cantilever and the backup mechanism cantilever include a cantilever plate, and a cantilever shaft is provided on the plate surface of the cantilever plate.

[0011] Furthermore, the main mechanism cantilever lever and the backup mechanism cantilever lever comprise a lever plate, a lever shaft is provided on the plate surface of the lever plate, and a gate opening lever driving part is provided on the outer side surface of the lever plate.

[0012] Furthermore, the left interlock rod and the right interlock rod include a rod body, one end of the rod body is provided with a spring hanging shaft, the other end is provided with a cantilever shaft mounting hole, the rod body is also provided with a cantilever lever mounting hole, and the cantilever lever mounting hole is a waist-shaped hole.

[0013] Furthermore, the upper opening lever and the lower opening lever are equipped with a trigger arm, and the trigger arm is linked with the opening lever driving part. The rotation of the opening lever driving part can drive the trigger arm to drive the corresponding upper opening lever and lower opening lever to rotate. The upper opening lever and the lower opening lever are also equipped with an opening cantilever, and the opening cantilever can drive the corresponding opening linkage arm on the main mechanism opening half-shaft and the standby mechanism opening half-shaft.

[0014] Furthermore, the upper opening lever and the lower opening lever are respectively installed in the upper groove and the lower groove of the base.

[0015] Furthermore, the main shaft of the main operating mechanism and the main shaft of the backup operating mechanism are respectively mounted on the side plates of the main operating mechanism and the backup operating structure, and the main operating mechanism and the backup operating structure are mounted on a base.

[0016] Furthermore, the main operating mechanism and the backup operating structure are mounted on the base and arranged symmetrically up and down with the horizontal midline of the base as the symmetry center, and the main operating mechanism and the backup operating structure are located in the same vertical direction of the base.

[0017] Beneficial Effects

[0018] The mechanical interlocking mechanism of a dual power automatic transfer switch provided by the present invention uses a connecting rod, a lever and an operating mechanism cantilever structure to connect the operating mechanisms controlling the main / standby contact system, so that when one operating mechanism drives its contact system to be in a closed state, the other operating mechanism is in and locked in an open position, thereby achieving the requirement that the main / standby contact system cannot be closed at the same time. The entire structure is simple, the assembly space occupied is relatively small, and it is more convenient to install, maintain and replace. It can also be integrated with other functional structures of the dual power automatic transfer switch to achieve modularization, and the production and manufacturing cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 is a schematic diagram of the installation structure of an embodiment of the present invention;

[0020] Attached Figure 2 is a schematic diagram of the base structure in an embodiment of the present invention;

[0021] Attached Figure 3a is a schematic diagram showing that the main contact system and the backup contact system are both in the open position in an embodiment of the present invention;

[0022] Attached Figure 3b Yes Figure 3aEnlarged view of point C in the middle;

[0023] Attached Figure 3c Yes Figure 3a Enlarged view of point D in the middle;

[0024] Attached Figure 4a Schematic diagram of the main contact system closing position and the standby contact system opening position in an embodiment of the present invention;

[0025] Attached Figure 4b Yes Figure 4a Enlarged view of point E in the middle;

[0026] Attached Figure 5a Schematic diagram of the main contact system open position and the standby contact system closed position in an embodiment of the present invention;

[0027] Attached Figure 5b Yes Figure 5a Enlarged view of point F in the middle;

[0028] Attached Figure 6 It is a schematic diagram of the structure of the main operating mechanism in an embodiment of the present invention;

[0029] Attached Figure 7 is a schematic diagram of the structure of the standby operating mechanism in an embodiment of the present invention;

[0030] Attached Figure 8 2 is a schematic diagram of the upper opening lever structure in an embodiment of the present invention;

[0031] Attached Fig. 9 2 is a schematic diagram of the structure of the lower opening lever in an embodiment of the present invention;

[0032] Attached Fig.10 It is the structural intention of the left interlocking rod or the right interlocking rod in the embodiment of the present invention;

[0033] Attached Fig.11 It is a schematic diagram of the structure of the main mechanism opening half-shaft or the standby mechanism opening half-shaft in an embodiment of the present invention;

[0034] Attached Fig.12 It is a schematic diagram of the structure of the cantilever lever of the main mechanism or the cantilever lever of the backup mechanism in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Example

[0037] As attached Figure 1 and 2As shown, a mechanical interlocking mechanism of a dual power automatic transfer switch comprises a main operating mechanism spindle 1 and a backup operating mechanism spindle 2, wherein the main operating mechanism spindle 1 and the backup operating mechanism spindle 2 are respectively mounted on the side plates of a main operating mechanism A and a backup operating structure B, and the main operating mechanism A and the backup operating structure B are mounted on a base 11. In this embodiment, the main operating mechanism A and the backup operating structure B are mounted on the base 11 and are arranged symmetrically up and down with the horizontal midline of the base 11 as the symmetry center, and the main operating mechanism A and the backup operating structure B are located in the same vertical direction of the base 11.

[0038] As attached Figure 6 As shown, the main operating mechanism main shaft 1 is equipped with a main mechanism cantilever 101, as shown in the attached Figure 7 As shown, the standby operating mechanism main shaft 2 is equipped with a standby mechanism cantilever 201, wherein, as shown in the attached Figure 1 As shown, the main operating mechanism main shaft 1 is also equipped with a main mechanism cantilever lever 102, and the backup operating mechanism main shaft 2 is also equipped with a backup mechanism cantilever lever 202; the main mechanism cantilever 101 is linked with the upper end of the right interlocking rod 3, the lower end of the right interlocking rod 3 is linked with the backup mechanism cantilever lever 202, the backup mechanism cantilever lever 202 is linked with the lower opening lever 4, and the lower opening lever 4 is linked with the backup mechanism opening half shaft 5; one end of the main reset spring 9 is installed on the right interlocking rod 3, and the other end is installed on the backup mechanism cantilever lever 202. The backup mechanism cantilever 201 is linked with the lower end of the left interlocking rod 6, the upper end of the left interlocking rod 6 is linked with the main mechanism cantilever lever 102, the main mechanism cantilever lever 102 is linked with the upper opening lever 7, and the upper opening lever 7 is linked with the main mechanism opening half shaft 8. One end of the spare return spring 10 is mounted on the left interlocking rod 6, and the other end is mounted on the cantilever lever 102 of the main mechanism.

[0039] The specific structure of the relevant components in this embodiment is further described in detail below:

[0040] The main mechanism cantilever 101 and the backup mechanism cantilever 201 include cantilever plates 101a and 201a respectively, and cantilever shafts 101a01 and 201a01 are respectively disposed on the plate surfaces of the cantilever plates 101a and 201a.

[0041] As attached Fig.12 As shown, the main mechanism cantilever lever 102 and the backup mechanism cantilever lever 202 respectively include lever plates 102a and 202a, and the plate surfaces of the lever plates 102a and 202a are respectively provided with lever shafts 102a01 and 202a01, and the outer side surfaces of the lever plates 102a and 202a are respectively provided with opening lever driving parts 102a02 and 202a02.

[0042] As attached Fig.10 As shown, the left interlocking rod 6 and the right interlocking rod 3 include a rod body 601, 301, one end of the rod body 601, 301 is provided with a spring hanging shaft 601a, 301a, the other end is provided with a cantilever shaft mounting hole 601b, 301b, the rod body 601, 301 is also provided with a cantilever lever mounting hole 601c, 301c, and the cantilever lever mounting hole 601c, 301c is a waist-shaped hole.

[0043] The upper opening lever 7 and the lower opening lever 4 are respectively installed in the upper groove 11a and the lower groove 11b of the base 11. Figure 8 As shown, the upper opening lever 7 is equipped with a spring or a spring 701, a trigger arm 702 and an opening cantilever 703. Fig. 9 As shown, the lower opening lever 4 is equipped with a spring or a spring 401, a trigger arm 402 and an opening cantilever 403; in this embodiment, springs 701 and 401 are used to resist the base 11. The trigger arm 702 is linked with the opening lever driving part 102a02, and the rotation of the opening lever driving part 102a02 can drive the trigger arm 702 to drive the corresponding upper opening lever 7 to rotate; the trigger arm 402 is linked with the opening lever driving part 202a02, and the rotation of the opening lever driving part 202a02 can drive the trigger arm 402 to drive the corresponding lower opening lever 4 to rotate. The opening cantilever 703 can drive the upper opening lever 702 to rotate. Fig.11 The corresponding opening linkage arm 801 on the opening half shaft 8 of the main mechanism is shown, and the opening cantilever 403 can drive the Fig.11 The corresponding opening linkage arm 501 on the opening half-shaft 5 of the backup mechanism is shown.

[0044] As attached Figure 3a , 3b As shown in 3c, the main contact system and the backup contact system are both in the open position, and the main operating mechanism A and the backup operating mechanism B have completed energy storage;

[0045] At this time, the closing button of the main operating mechanism A is operated to close the switch. During the closing process, the main operating mechanism main shaft 1 of the main operating mechanism A rotates clockwise, and the right interlocking rod 3 moves downward in linkage with the main mechanism cantilever 101; during the downward movement of the right interlocking rod 3, the trigger arm 402 of the lower opening lever 4 is linked to make the lower opening lever 4 rotate clockwise; during the clockwise rotation of the lower opening lever 4, its opening cantilever 403 triggers the corresponding opening linkage arm 501 on the opening half shaft 5 of the standby mechanism to rotate, so that the standby standby operating structure B cannot perform the closing operation, as shown in the attached figure. Figure 4a and 4b shown.

[0046] If the closing button of the standby operating structure B is operated to close the switch, during the closing process, the standby operating mechanism main shaft 2 of the standby operating structure B rotates counterclockwise, and the left interlocking rod 6 moves upward in linkage with the standby mechanism cantilever 201; during the upward movement of the left interlocking rod 6, the trigger arm 702 of the upper opening lever 7 is linked to make the upper opening lever 7 rotate counterclockwise; during the counterclockwise rotation of the upper opening lever 7, its opening cantilever 703 triggers the corresponding opening linkage arm 801 on the main mechanism opening half shaft 8 to rotate, so that the main operating mechanism A cannot perform the closing operation, as shown in the attached figure. Figure 5a and 5b shown.

[0047] The structures, proportions, sizes, quantities, etc. illustrated in the accompanying drawings of the embodiments of the present invention are only used to match the contents disclosed in the specification so as to be understood and read by those familiar with the technology, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects that the present invention can produce and the purposes that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "counterclockwise", etc. cited in this specification are only for the convenience of narration, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

Claims

1. A mechanical interlocking mechanism of a dual power automatic transfer switch, comprising a main operating mechanism spindle (1) and a backup operating mechanism spindle (2), wherein the main operating mechanism spindle (1) is provided with a main mechanism cantilever (101), and the backup operating mechanism spindle (2) is provided with a backup mechanism cantilever (201), characterized in that: The main operating mechanism main shaft (1) is also provided with a main mechanism cantilever lever (102), and the backup operating mechanism main shaft (2) is also provided with a backup mechanism cantilever lever (202); The main mechanism cantilever (101) is linked to the upper end of the right interlocking rod (3), the lower end of the right interlocking rod (3) is linked to the standby mechanism cantilever lever (202), the standby mechanism cantilever lever (202) is linked to the lower opening lever (4), and the lower opening lever (4) is linked to the standby mechanism opening half shaft (5); The standby mechanism cantilever (201) is linked to the lower end of the left interlocking rod (6), the upper end of the left interlocking rod (6) is linked to the main mechanism cantilever lever (102), the main mechanism cantilever lever (102) is linked to the upper opening lever (7), and the upper opening lever (7) is linked to the main mechanism opening half shaft (8).

2. The mechanical interlocking mechanism of a dual power automatic transfer switch according to claim 1, characterized in that: One end of the main reset spring (9) is mounted on the right interlocking rod (3), and the other end is mounted on the backup mechanism cantilever lever (202); one end of the backup reset spring (10) is mounted on the left interlocking rod (6), and the other end is mounted on the main mechanism cantilever lever (102).

3. The mechanical interlocking mechanism of a dual power automatic transfer switch according to claim 1, characterized in that: The upper opening lever (7) and the lower opening lever (4) are provided with springs or spring sheets (701, 401), and the spring sheets or springs (701, 401) are pressed against the base (11).

4. The mechanical interlocking mechanism of a dual power automatic transfer switch according to claim 1, characterized in that: The main mechanism cantilever (101) and the standby mechanism cantilever (201) comprise cantilever plates (101a, 201a), and cantilever shafts (101a01, 201a01) are provided on the plate surfaces of the cantilever plates (101a, 201a).

5. The mechanical interlocking mechanism of a dual power automatic transfer switch according to claim 1, characterized in that: The main mechanism cantilever lever (102) and the standby mechanism cantilever lever (202) comprise lever plates (102a, 202a), the plate surfaces of the lever plates (102a, 202a) are provided with lever shafts (102a01, 202a01), and the outer side surfaces of the lever plates (102a, 202a) are provided with opening lever driving parts (102a02, 202a02).

6. The mechanical interlocking mechanism of a dual power automatic transfer switch according to claim 1, characterized in that: The left interlocking rod (6) and the right interlocking rod (3) comprise a rod body (601, 301), one end of the rod body (601, 301) is provided with a spring hanging shaft (601a, 301a), and the other end is provided with a cantilever shaft mounting hole (601b, 301b), and the rod body (601, 301) is also provided with a cantilever lever mounting hole (601c, 301c), and the cantilever lever mounting hole (601c, 301c) is a waist-shaped hole.

7. The mechanical interlocking mechanism of a dual power automatic transfer switch according to claim 5, characterized in that: The upper opening lever (7) and the lower opening lever (4) are provided with actuating arms (702, 402), the actuating arms (702, 402) being linked to the opening lever driving unit (102a02, 202a02), the opening lever driving unit (102a02, 202a02) being able to rotate to drive the actuating arms (702, 402) to drive the corresponding upper opening lever (7) and lower opening lever (4) to rotate, the upper opening lever (7) and the lower opening lever (4) being further provided with opening cantilevers (703, 403), the opening cantilevers (703, 403) being able to drive the corresponding opening linkage arms (801, 501) on the opening half shaft (8) of the main mechanism and the opening half shaft (5) of the standby mechanism.

8. The mechanical interlocking mechanism of a dual power automatic transfer switch according to claim 1, characterized in that: The upper opening lever (7) and the lower opening lever (4) are respectively mounted in an upper groove (11a) and a lower groove (11b) of the base (11).

9. The mechanical interlocking mechanism of a dual power automatic transfer switch according to claim 1, characterized in that: The main operating mechanism spindle (1) and the backup operating mechanism spindle (2) are respectively mounted on the side plates of the main operating mechanism (A) and the backup operating structure (B), and the main operating mechanism (A) and the backup operating structure (B) are mounted on a base (11).

10. The mechanical interlocking mechanism of a dual power automatic transfer switch according to claim 9, characterized in that: The main operating mechanism (A) and the backup operating structure (B) are mounted on the base (11) and are arranged symmetrically up and down with the horizontal center line of the base (11) as the symmetry center. The main operating mechanism (A) and the backup operating structure (B) are located in the same vertical direction of the base (11).

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