A mechanical interlocking device for a dual power automatic transfer switch

Abstract

A mechanical interlocking device for a dual power automatic transfer switch comprises a main operating mechanism main shaft (1) and a backup operating mechanism main shaft (2), wherein the main operating mechanism main shaft (1) is provided with a main mechanism cantilever (101), and the backup operating mechanism main shaft (2) is provided with a backup mechanism cantilever (201), and is characterized in that: the main mechanism cantilever (101) is connected to the upper end of a left interlocking rod (3), and the lower end of the left interlocking rod (3) is linked with a backup opening lever (5) by means of an elastic device (4), and can drive the backup opening lever (5) to rotate, and the backup opening lever (5) can be linked with the backup mechanism opening half shaft (6) during the rotation process; the entire device has a simple and efficient structure, occupies a relatively small assembly space, has the functions of flexible contact conversion and adjustable size, 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, and greatly reduce the production and manufacturing 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 device for 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 device for a dual power automatic transfer switch in view of the technical defects of the mechanical interlocking device of the above-mentioned existing dual power automatic transfer switch, which is weak in impact resistance and large in size. The mechanical interlocking device is connected to the operating mechanism controlling the main / standby contact system by means of connecting rods, levers and operating mechanism cantilevers, 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 device has a simple and efficient structure, occupies a relatively small assembly space, has flexible contact conversion and adjustable size functions, 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, and greatly reduce the production and manufacturing costs.

[0005] In order to overcome the shortcomings of the mechanical interlocking device of the existing dual power automatic transfer switch, the present invention designs a mechanical interlocking device 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 mechanism cantilever is connected to the upper end of the left interlocking rod, the lower end of the left interlocking rod is linked with the backup opening lever by an elastic device to drive the backup opening lever to rotate, and the backup opening lever can be linked with the backup mechanism opening half shaft during rotation;

[0006] The standby mechanism cantilever is connected to the lower end of the right interlocking rod. The upper end of the right interlocking rod is linked with the main opening lever by an elastic device to drive the main opening lever to rotate. During the rotation of the main opening lever, it can be linked with the main mechanism opening half shaft.

[0007] Furthermore, the left interlocking rod and the right interlocking rod are located in the bracket seat and are restricted to move only along their own length direction.

[0008] Furthermore, the elastic device includes a mounting plate and a spring sheet, the mounting plate and the spring sheet are assembled together, and the mounting plate is mounted on one end of the left interlocking rod or the right interlocking rod and its position is adjustable.

[0009] Furthermore, the main opening lever and the spare opening lever are equipped with a trigger arm, and the trigger arm is linked with the corresponding spring piece 1, and the spring piece 1 can drive the trigger arm to drive the corresponding main opening lever and the spare opening lever to rotate. The main opening lever and the spare 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-axis and the backup mechanism opening half-axis.

[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 opening lever and the spare opening lever are provided with two springs or two springs, and the two springs or two springs are pressed against the base.

[0012] Furthermore, one end of the mounting plate of the left interlocking rod and the right interlocking rod is a frosted surface, and the mounting plate is mounted on the frosted surface by screws, and at least one of the screw holes is a waist-shaped hole for adjusting the position of the mounting plate.

[0013] Furthermore, the bracket seat includes a bracket limiting seat, the bracket limiting seat is provided with a limiting groove, the rod bodies of the left interlocking rod and the right interlocking rod are located in the limiting groove, the bracket limiting seat is covered with a bracket plate, and the bracket seat is installed on a base.

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

[0015] Furthermore, the main shaft of the main operating mechanism and the main shaft of the backup operating mechanism are respectively installed on the side panels of the main operating mechanism and the backup operating structure. The main operating mechanism and the backup operating structure are installed on the base and are symmetrically arranged up and down with the horizontal midline of the base as the center of symmetry. The main operating mechanism and the backup operating structure are located in the same vertical direction of the base.

[0016] Beneficial Effects

[0017] The present invention provides a mechanical interlocking device for a dual power automatic transfer switch, which uses a connecting rod, a lever, and an operating mechanism cantilever structure to connect the operating mechanisms that control 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 device has a simple and efficient structure, occupies a relatively small assembly space, has flexible contact conversion and adjustable size functions, 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, and greatly reduce the production and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 is a schematic diagram of the installation structure of an embodiment of the present invention;

[0019] Attached Figure 2 is a schematic diagram of the base structure in an embodiment of the present invention;

[0020] Attached Figure 3a Schematic diagram of the main contact system and the backup contact system in the open position in the embodiment of the present invention; Figure 3b Yes Figure 3a Enlarged view of point C in the middle;

[0021] Attached Figure 3c Yes Figure 3a Enlarged view of point D in the middle;

[0022] 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;

[0023] Attached Figure 4b Yes Figure 4a Enlarged view of point E in the middle;

[0024] 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;

[0025] Attached Figure 5b Yes Figure 5a Enlarged view of point F in the middle;

[0026] Attached Figure 6 It is a schematic diagram of the structure of the main operating mechanism in an embodiment of the present invention;

[0027] Attached Figure 7 is a schematic diagram of the structure of the standby operating mechanism in an embodiment of the present invention;

[0028] Attached Figure 8 2 is a schematic diagram of the main opening lever structure in an embodiment of the present invention;

[0029] Attached Fig. 9 2 is a schematic diagram of the structure of a standby tripping lever in an embodiment of the present invention;

[0030] Attached Fig.10 is a schematic diagram of the installation structure of the elastic device in an embodiment of the present invention;

[0031] Attached Fig.11 Schematic diagram of the structure of the left interlocking rod or the right interlocking rod in an embodiment of the present invention;

[0032] Attached Fig.12 is a schematic diagram of the structure of the elastic device in an embodiment of the present invention;

[0033] Attached Fig.13 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.14 2 is a schematic diagram of the support limit seat structure in an embodiment of the present invention;

[0035] Attached Fig.15 Schematic diagram of the bracket installation structure in an embodiment of the present invention; DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Examples

[0038] As attached Figure 1 and 2 As shown, a mechanical interlocking device of 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 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, the main operating mechanism A and the backup operating structure B are mounted on the base and 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. The main opening lever 8 and the backup opening lever 5 are respectively mounted in the upper groove 11a and the lower groove 11b of the corresponding base 11.

[0039] As attached Figure 6 As shown, the main operating mechanism main shaft 1 is equipped with a main mechanism cantilever 101. Figure 7 As shown, a standby mechanism cantilever 201 is mounted on the main shaft 2 of the standby operating mechanism, wherein the main mechanism cantilever 101 is connected to the upper end of the left interlocking rod 3, and the lower end of the left interlocking rod 3 is linked with the standby opening lever 5 by the elastic device 4 to drive the standby opening lever 5 to rotate, and the standby opening lever 5 can be linked with the standby mechanism opening half shaft 6 during the rotation process; the standby mechanism cantilever 201 is connected to the lower end of the right interlocking rod 7, and the upper end of the right interlocking rod 7 is linked with the main opening lever 8 by the elastic device 4' to drive the main opening lever 8 to rotate, and the main opening lever 8 can be linked with the main mechanism opening half shaft 9 during the rotation process. The left interlocking rod 3 and the right interlocking rod 7 are located in the bracket seat 10 and are restricted to move only along their own length direction.

[0040] The specific structure of the relevant components in this embodiment is further described in detail below:

[0041] As attached Fig.10 and 12 As shown, the elastic device 4, 4' comprises a mounting plate 401, 401' and a spring piece 402, 402', the mounting plate 401, 401' and the spring piece 402, 402' are assembled together, and the mounting plate 401, 401' is mounted on one end of the left interlocking rod 3 or the right interlocking rod 7 and the position thereof is adjustable.

[0042] As attached Figure 8 and 9As shown, the main opening lever 8 and the spare opening lever 5 are equipped with a trigger arm 801, 501, and the trigger arm 801, 501 is linked with the corresponding spring piece 1 402, 402', and the spring piece 1 402, 402' can drive the trigger arm 801, 501 to drive the corresponding main opening lever 8 and the spare opening lever 5 to rotate. The main opening lever 8 and the spare opening lever 5 are also equipped with a closing cantilever 802, 502, and the closing cantilever 802, 502 can drive Fig.13 The corresponding opening linkage arms 901, 601 on the main mechanism opening half-shaft 9 and the backup mechanism opening half-shaft 6 are shown.

[0043] The main mechanism cantilever 101 and the backup mechanism cantilever 201 include cantilever plates 101a, 201a, and cantilever shafts 101a01, 201a01 are provided on the plate surfaces of the cantilever plates 101a, 201a.

[0044] The main opening lever 8 and the standby opening lever 5 are provided with a second spring or a second spring. In this embodiment, the second spring 803 , 503 is used to press against the base 11 .

[0045] As attached Fig.11 As shown, one end of the left interlocking rod 3 and the right interlocking rod 7 for mounting the mounting plate 401, 401' is a frosted surface, and the mounting plate 401, 401' is mounted on the frosted surface by screws, and at least one of the screw holes is a waist-shaped hole for adjusting the position of the mounting plate 401, 401'.

[0046] As attached Fig.14 and 15 As shown, the bracket seat 10 includes a bracket limit seat 10a, and a limit groove 10a01 is provided on the bracket limit seat 10a. The rod bodies of the left interlocking rod 3 and the right interlocking rod 7 are located in the limit groove 10a01. The bracket limit seat 10a is covered with a bracket plate 10b, and the bracket seat 10 is installed on a base 11.

[0047] 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;

[0048] 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 left interlocking rod 3 moves downward through the main mechanism cantilever 101; during the downward movement of the left interlocking rod 3, the standby opening lever 5 is linked to rotate clockwise; during the clockwise rotation of the standby opening lever 5, its trigger arm 501 triggers the opening linkage arm 601 on the standby mechanism opening half shaft 6 of the standby operating mechanism B to rotate, so that the standby operating mechanism B cannot perform the closing operation. Figure 4a and 4b shown.

[0049] If the closing button of the backup operating mechanism B is operated to close the switch, during the closing process, the backup operating mechanism main shaft 2 of the backup operating mechanism B rotates counterclockwise, and the right interlocking rod 7 moves upward through the backup mechanism cantilever 201; during the upward movement of the right interlocking rod 7, the main opening lever 8 is linked to make the dynamic main opening lever 8 rotate counterclockwise; during the clockwise rotation of the dynamic main opening lever 8, its trigger arm 801 triggers the opening linkage arm 901 on the main mechanism opening half shaft 9 of the main operating mechanism A to rotate, so that the main operating mechanism A cannot perform the closing operation. Figure 5a and 5b shown.

[0050] 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 device for 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 mechanism cantilever (101) is connected to the upper end of the left interlocking rod (3); the lower end of the left interlocking rod (3) is linked with the standby opening lever (5) by means of an elastic device (4) to drive the standby opening lever (5) to rotate; and the standby opening lever (5) can be linked with the standby mechanism opening half shaft (6) during rotation; The standby mechanism cantilever (201) is connected to the lower end of the right interlocking rod (7), and the upper end of the right interlocking rod (7) is linked with the main opening lever (8) by means of an elastic device (4') to drive the main opening lever (8) to rotate. During the rotation of the main opening lever (8), the main opening lever (8) can be linked with the main mechanism opening half shaft (9).

2. The mechanical interlocking device of a dual power automatic transfer switch according to claim 1, characterized in that: The left interlocking rod (3) and the right interlocking rod (7) are located in the bracket seat (10) and are restricted to move only along their own length direction.

3. The mechanical interlocking device of a dual power automatic transfer switch according to claim 1, characterized in that: The elastic device (4, 4') comprises a mounting plate (401, 401') and a spring piece one (402, 402'), wherein the mounting plate (401, 401') and the spring piece one (402, 402') are assembled together, and the mounting plate (401, 401') is mounted on one end of the left interlocking rod (3) or the right interlocking rod (7) and its position is adjustable.

4. The mechanical interlocking device of a dual power automatic transfer switch according to claim 1, characterized in that: The main opening lever (8) and the spare opening lever (5) are provided with a trigger arm (801, 501), the trigger arm (801, 501) is linked with the corresponding spring piece 1 (402, 402'), the spring piece 1 (402, 402') can drive the trigger arm (801, 501) to drive the corresponding main opening lever (8) and the spare opening lever (5) to rotate, the main opening lever (8) and the spare opening lever (5) are also provided with a closing cantilever (802, 502), the closing cantilever (802, 502) can drive the corresponding closing linkage arm (901, 601) on the main mechanism opening half shaft (9) and the spare mechanism opening half shaft (6).

5. The mechanical interlocking device 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).

6. The mechanical interlocking device of a dual power automatic transfer switch according to claim 1, characterized in that: The main opening lever (8) and the standby opening lever (5) are provided with a second spring sheet or a second spring (803, 503), and the second spring sheet or the second spring (803, 503) abuts against the base (11).

7. The mechanical interlocking device of a dual power automatic transfer switch according to claim 3, characterized in that: One end of the mounting plate (401, 401') on which the left interlocking rod (3) and the right interlocking rod (7) are mounted is a frosted surface, and the mounting plate (401, 401') is mounted on the frosted surface by means of screws, and at least one of the screw holes is a waist-shaped hole for adjusting the position of the mounting plate (401, 401').

8. The mechanical interlocking device of a dual power automatic transfer switch according to claim 2, characterized in that: The bracket seat (10) comprises a bracket limiting seat (10a), a limiting groove (10a01) is provided on the bracket limiting seat (10a), the rod bodies of the left interlocking rod (3) and the right interlocking rod (7) are located in the limiting groove (10a01), the bracket limiting seat (10a) is covered by a bracket plate (10b), and the bracket seat (10) is mounted on a base (11).

9. The mechanical interlocking device of a dual power automatic transfer switch according to claim 1, characterized in that: The main opening lever (8) and the standby opening lever (5) are respectively mounted in an upper groove (11a) and a lower groove (11b) of a corresponding base (11).

10. The mechanical interlocking device 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); the main operating mechanism (A) and the backup operating structure (B) are mounted on a base and are symmetrically arranged 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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