Position signal device, using method and phase-changing isolating switch mechanism

Abstract

The invention belongs to the technical field of high-voltage power transmission and transformation system switches, and discloses a position signal device, a using method and a phase change isolating switch mechanism. The device comprises a guide block, mounting plates are mounted on the two sides of the guide block, a through hole is formed in the guide block, a driving pin is arranged in the through hole of the guide block, and one end of the driving pin is connected with a transmission pin; the other end is connected with a wedge block; one side of the mounting plate back to the guide block is connected with an auxiliary switch mounting plate, the other end of the auxiliary switch mounting plate away from the mounting plate is connected with an auxiliary switch, and the auxiliary switch is provided with an extended rotation control rod; the transmission pin is connected with a crank arm, and the axial direction of the crank arm is perpendicular to the axial direction of the transmission pin. The rotary control rod penetrates through the auxiliary switch mounting plate and is connected with the middle part of the crank arm; and an elastic piece is arranged between the guide block and the wedge-shaped block. The device provided by the invention can meet the use requirements of an operating mechanism with a linear and large-stroke motion trail.

Description

Technical Field

[0001] The present invention belongs to the technical field of switches for high-voltage power transmission and transformation systems, and in particular relates to a position signal device, a use method and a phase-changing isolating switch mechanism. Background Art

[0002] Pumped storage has multiple functions such as peak regulation, frequency regulation, phase regulation, energy storage, and emergency standby. It is the most mature, economically optimal, and most suitable green, low-carbon, clean, and flexible power source for the power system with large-scale development conditions. The phase-changing disconnector is a special primary device for realizing the conversion of the two working conditions of the pumped storage power station unit, the power generation and the motor. It is installed in the main circuit of the generator motor output voltage and participates in the conversion process of various working conditions of the pumped storage power station. The function conversion operation of the generator motor has the characteristics of high operation frequency compared with the disconnectors of the transmission and distribution network and the power station. Whether its state is good or not is extremely important to the operation of the pumped storage power station. The phase-changing disconnector operating mechanism, as the actuator of the phase-changing disconnector, not only needs to meet the high reliability of mechanical properties, but also should accurately output the position signal under various working conditions, as an important basis for the auxiliary judgment of the pumped storage control and signal system.

[0003] The Chinese patent publication number is CN117275993A, and the name is a patent application for a phase-changing disconnector operating mechanism and its operating method. The mechanism includes a first operating device, a second operating device, a third operating device and a control system. The first operating device and the second operating device are respectively arranged at the two ends of the chassis, and a driving device is arranged in the middle of the chassis. The driving device is connected to the first and second operating devices through a transmission device; the first, second and third operating devices are all electrically connected to the control system. When the control system receives a task instruction, the transmission device drives the first and second operating devices to work synchronously to switch the phase sequence of any two phases of the main circuit. This patent application cannot accurately output a signal when the main transmission reaches a predetermined position and automatically reset after the main transmission is away from the position. Summary of the invention

[0004] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a position signal device, a method of use and a phase-changing isolating switch mechanism, which can not only accurately output a signal when the main transmission reaches a predetermined position, but also automatically reset after the main transmission moves away from the position, fully meeting the use requirements of operating mechanisms with linear and large-stroke motion trajectories.

[0005] To achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a position signal device, comprising: a guiding block, on both sides of which mounting plates are installed; a through hole is formed in the guiding block; a driving pin is arranged in the through hole of the guiding block; one end of the driving pin is connected with a transmission pin, and the other end is connected with a wedge block; on the side of the mounting plate facing away from the guiding block, an auxiliary switch mounting plate is connected, and at the other end of the auxiliary switch mounting plate away from the mounting plate, an auxiliary switch is connected, and the auxiliary switch has a protruding rotation control rod; the transmission pin is connected with a crank arm, and the axial direction of the crank arm is perpendicular to the axial direction of the transmission pin; the rotation control rod passes through the auxiliary switch mounting plate and is connected to the middle of the crank arm; an elastic member is arranged between the guiding block and the wedge block.

[0006] Optionally, a long hole is formed at the end of the driving pin; the long axis axial direction of the long hole is perpendicular to the axial direction of the driving pin; the transmission pin is arranged in the long hole.

[0007] Optionally, the projection of the axial direction of the crank arm on the horizontal plane intersects with the axial direction of the driving pin.

[0008] Optionally, a bushing is arranged in the through hole of the guiding block, and the driving pin is arranged in the bushing.

[0009] Optionally, the bushing comprises a first bushing and a second bushing, the driving pin is arranged in the second bushing, a guiding pin is arranged in the first bushing, and the guiding pin is connected with the wedge block.

[0010] Optionally, the number of the first bushings is two, which are respectively arranged on both sides of the second bushing; a return spring is sleeved on the guiding pin.

[0011] Optionally, a square hole is formed in the auxiliary switch mounting plate, and the rotation control rod passes through the square hole; one side of the square hole is arc-shaped, and the side surface of the transmission pin is attached to the arc edge of the square hole.

[0012] Optionally, the transmission pin passes through the crank arm, and a nylon nut is respectively installed on both sides of the crank arm for the transmission pin.

[0013] In a second aspect, the present invention provides a method for using the position signal device as described above, comprising the following steps: When it is necessary to change the auxiliary switch to the first state, push the wedge block to drive the driving pin to move, and through the driving pin, make the transmission pin rotate around the rotation control rod of the auxiliary switch, and drive the crank arm to rotate the rotation control rod through the transmission pin; When it is necessary to change the auxiliary switch to the second state, stop pushing the wedge block, and through the elastic member, make the wedge block rebound, drive the driving pin and the transmission pin, and drive the crank arm to rotate the rotation control rod through the transmission pin.

[0014] In a third aspect, the present invention provides a phase-change disconnector mechanism, including a three-phase driving device, and a position signal device is mounted on the side of the three-phase driving device through a mounting plate; a ball screw pair is installed in each of the three-phase driving devices, an auxiliary switch driving plate is sleeved on the ball screw pair, the auxiliary switch driving plate is in threaded connection with the ball screw pair, and a roller is connected to the side of the auxiliary switch driving plate; a strip-shaped groove is formed in the side of the three-phase driving device, the wedge-shaped block faces the strip-shaped groove, and the roller extends out of the strip-shaped groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Compared with the traditional rotary output type disconnector mechanism and its position signal device, the intensive phase-change disconnector operating mechanism belongs to a new type of operating mechanism with a linear shape and a large stroke. The position signal device provided by the present invention can not only accurately output a signal when the main drive reaches a predetermined position, but also automatically reset after the main drive moves away from this position, fully meeting the usage requirements of the new type of operating mechanism with a linear shape and a large stroke movement track.

[0016] Furthermore, the phase-change disconnector mechanism of the present invention can provide an important auxiliary criterion for pumped-storage control and signal systems, meeting the requirements for the stable operation of large pumped-storage power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present invention in any way. Additionally, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the present invention, rather than specifically limiting the shapes and proportional dimensions of the components of the present invention. In the drawings: Figure 1 is a layout schematic diagram of the position signal device for the phase-change disconnector mechanism disclosed by the present invention; Figure 2 is a structural schematic diagram of the position signal device for the phase-change disconnector mechanism disclosed by the present invention; Figure 3 is Figure 2 a bottom view of; Figure 4 is Figure 2 a sectional view taken along the A-A direction of; Figure 5 is a structural schematic diagram of the auxiliary switch mounting plate disclosed in the present invention; Figure 6 is a structural schematic diagram of the wedge-shaped block disclosed in the present invention; Figure 7 is a structural schematic diagram of the driving pin disclosed in the present invention; Figure 8 is a structural schematic diagram of the transmission pin disclosed in the present invention.

[0018] In the figure: 1 - A-phase drive device; 2 - B-phase drive device; 3 - C-phase drive device; 4 - position signal device; 5 - ball screw pair; 6 - auxiliary switch drive board; 7 - roller; 8 - pin; 9 - bent plate; 10 - guide block; 11 - shaft pin; 12 - spacer block; 13 - auxiliary switch; 14 - auxiliary switch mounting plate; 15 - crank arm; 16 - nylon nut; 17 - drive pin; 18 - wedge block; 19 - return spring; 20 - guide pin; 21 - first bushing; 22 - drive pin; 23 - second bushing; 24 - baffle; 25 - cylindrical pin. Detailed implementation manners

[0019] In order to enable those skilled in the art of this technology to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0022] When an element is referred to as being "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments. When the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0023] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the present invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly dictates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0025] The present invention will be described in detail below with reference to the accompanying drawings.

[0026] A position signal device of the present invention includes: a guide block 10, mounting plates 9 are installed on both sides of the guide block 10, a through hole is provided in the guide block 10, a driving pin 22 is disposed in the through hole of the guide block 10, one end of the driving pin 22 is connected to a transmission pin 17, and the other end is connected to a wedge block 18; an auxiliary switch mounting plate 14 is connected to the side of the mounting plate 9 facing away from the guide block 10, the other end of the auxiliary switch mounting plate 14 away from the mounting plate 9 is connected to an auxiliary switch 13, and the auxiliary switch 13 has a protruding rotation control rod; the transmission pin 17 is connected to a crank arm 15, and the axial direction of the crank arm 15 is perpendicular to the axial direction of the transmission pin 17; the rotation control rod passes through the auxiliary switch mounting plate 14 and is connected to the middle of the crank arm 15; an elastic member is provided between the guide block 10 and the wedge block 18.

[0027] The usage method of the described position signal device includes the following steps: When it is necessary to change the auxiliary switch 13 to the first state, the wedge block 18 is pushed to drive the driving pin 22 to move. Through the driving pin 22, the transmission pin 17 rotates around the rotation control rod of the auxiliary switch 13, and the toggle arm 15 is driven by the transmission pin 17 to rotate the rotation control rod. When it is necessary to change the auxiliary switch 13 to the second state, the pushing of the wedge block 18 is stopped, and the wedge block 18 rebounds through the elastic member, driving the driving pin 22 and the transmission pin 17. The toggle arm 15 is driven by the transmission pin 17 to rotate the rotation control rod.

[0028] A phase-changing disconnector mechanism of the present invention includes a three-phase driving device. The position signal device is installed on the side of the three-phase driving device through a mounting plate 9. A ball screw pair 5 is installed in each of the three-phase driving devices. An auxiliary switch driving plate 6 is sleeved on the ball screw pair 5. The auxiliary switch driving plate 6 is threadedly connected to the ball screw pair 5. A roller 7 is connected to the side of the auxiliary switch driving plate 6. A strip-shaped groove is formed on the side of the three-phase driving device. The wedge block 18 faces the strip-shaped groove, and the roller 7 extends out of the strip-shaped groove.

[0029] Embodiment 1 A position signal device. The position signal device 4 includes a mounting plate 9. The mounting plate 9 is L-shaped, and the two mounting plates 9 are arranged back to back. A guide block 10 is arranged between the two mounting plates 9.

[0030] The mounting plate 9 is fixed on both sides of the guide block 10 through a shaft pin 11.

[0031] At the connection of the mounting plate 9 and the guide block 10, a cushion block 12 is arranged on the side facing away from the guide block 10. The cushion block 12 is fixed on the mounting plate 9 through a fastener.

[0032] An auxiliary switch mounting plate 14 is arranged on the side of the cushion block 12 facing away from the guide block 10. The auxiliary switch mounting plate 14 is connected to the cushion block 12 through a fastener.

[0033] Optionally, the fastener is a bolt.

[0034] One end of the auxiliary switch mounting plate 14 on the side facing away from the cushion block 12 is connected to the cushion block 12 through a fastener, and an auxiliary switch 13 is arranged at the other end.

[0035] The bottom of the auxiliary switch 13 has a rotation control rod. Specifically, the bottom of the rotation control rod is a square shaft, and a crank arm 15 is arranged on the square shaft of the auxiliary switch 13. One end of the crank arm 15 is provided with a transmission pin 17, and the transmission pin 17 is fixedly connected to the crank arm 15 through a nylon nut 16. The transmission pin 17 passes through the crank arm 15, and a nylon nut 16 is installed on each side of the crank arm 15 for the transmission pin 17.

[0036] A bushing is arranged in the guide block 10, and the bushing includes a first bushing 21 and a second bushing 23.

[0037] Optionally, both the first bushing 21 and the second bushing 23 are oil-free bushings.

[0038] Specifically, a through hole is provided on the guide block 10, and the bushing is installed in the through hole. A baffle 24 is installed on the end face of the through hole of the guide block 10. The baffle 24 is provided with a through hole corresponding to the position of the through hole of the guide block 10 for fixing the bushing in place. The guide pin 20 and the drive pin 22 respectively pass through the first bushing 21 and the second bushing 23 and are fixedly connected to the wedge block 18 through a thread and a cylindrical pin 25. The return spring 19 is sleeved on the guide pin 21, with one end abutted against the guide block 10 and the other end abutted against the wedge block 18.

[0039] A square hole is provided on the auxiliary switch mounting plate 14, and the rotation control rod passes through the square hole; one side of the square hole is arc-shaped, and the side surface of the transmission pin 17 is in contact with the arc edge of the square hole. When the transmission pin 17 moves, it can move around the arc edge of the square hole.

[0040] Optionally, the drive pin 22 has a stepped shaft.

[0041] Optionally, the transmission pin 17 has a stepped shaft with three unequal diameters.

[0042] A return spring 19 is arranged between the guide block 10 and the wedge block 18. After the wedge block 18 is moved by the action of the roller 7 and compresses the return spring 19, when the action of the roller is removed, the return spring 19 can reset the wedge block 18.

[0043] Specifically, the return spring 19 is sleeved on the guide pin 21.

[0044] Embodiment 2 A phase-separated disconnector mechanism includes a three-phase drive device, and a position signal device is installed on the side of the three-phase drive device through a mounting plate 9; a ball screw pair 5 is installed in each of the three-phase drive devices, an auxiliary switch drive plate 6 is sleeved on the ball screw pair 5, the auxiliary switch drive plate 6 is threadedly connected to the ball screw pair 5, and a roller 7 is connected to the side of the auxiliary switch drive plate 6; a strip-shaped groove is formed on the side of the three-phase drive device, the wedge block 18 faces the strip-shaped groove, and the roller 7 extends out of the strip-shaped groove.

[0045] Specifically, the three-phase drive device includes a phase-A drive device 1, a phase-B drive device 2, and a phase-C drive device 3.

[0046] Position signal devices 4 are arranged on the sides of the phase-A drive device 1, the phase-B drive device 2, and the phase-C drive device 3. Specifically, the position signal devices 4 are all arranged on the sides of the phase-A drive device 1, the phase-B drive device 2, and the phase-C drive device 3.

[0047] The roller 7 is hinged to one end of the auxiliary switch drive plate 6 through a pin 8, and the other end of the auxiliary switch drive plate 6 is fixedly connected to the ball screw pair 5.

[0048] The driving of the roller 7 can realize the conversion of position signals.

[0049] The roller 7 is in rolling contact with the wedge block 18.

[0050] Optionally, the roller 7 is circular.

[0051] Optionally, the wedge block 18 has two hypotenuses sharing a vertex, the included angle between the two hypotenuses is less than 180° and greater than 90°. The outer edge of the roller 7 is octagonal. The vertex of the roller 7 is connected to the vertex of the two hypotenuses of the wedge block. The inclined surfaces between the wedge block 18 and the roller 7 cooperate with each other.

[0052] Further, the vertexes of the two hypotenuses of the wedge block 18 form a side, that is, the vertexes of the two hypotenuses are truncated corners.

[0053] The roller 7 and the wedge block 18 cooperate to roll, forming a slider mechanism with periodic reciprocating motion.

[0054] The wedge block 18 has a reciprocating motion trajectory along the axial directions of the driving pin 22 and the guiding pin 20 fixedly connected thereto. The linear motion trajectory of the roller 7 is perpendicular to the motion trajectory line of the wedge block 18.

[0055] Obviously, the starting position of the toggle arm 15 can be determined. After the roller 7 moves away from the wedge block 18, under the combined action of the restoring force of the return spring 19 and the limit of the other side edge corresponding to the square hole with a width of S provided on the auxiliary switch mounting plate 14, the end position of the toggle arm 15 can be determined.

[0056] Embodiment 3 The disconnector switch has three working positions: isolation, power generation, and pumping. Whether it is switched to the power generation working position or the pumping working position, it should first return to the isolation position. When switching to the power generation working position or the pumping working position, the purpose is to synchronously switch the phase sequence of any two phases of the main circuit, so that the load can work in the generator or motor working mode. In this embodiment, the phase sequence of phases A and B is switched. No matter which mode it works in, when the mechanism reaches the specified position, it should reliably send a position signal, providing an important auxiliary criterion for the pumped-storage control and signal system.

[0057] In this embodiment, the three-phase drive device includes a phase A drive device 1, a phase B drive device 2, and a phase C drive device 3. Taking the electric operation to switch to the pumping station as an example, see Figure 1 , after the mechanism receives the instruction to switch to the pumping working position, phases A and B are driven by a common power source. Among them, the driving ball screw pair 5 moves downward and upward from the middle isolation position until it reaches the pumping position.

[0058] See Figure 2 , Figure 3 , Figure 4 and Figure 6 , taking the action of phase A as an example, when the roller 7 moves downward with the ball screw pair 5 and contacts the wedge surface with an inclination angle α of the wedge block 18, after the roller 7 cooperates with the wedge block 18, a slider mechanism is formed. The movement of the wedge block 18 along the axial directions of the driving pin 22 and the guiding pin 20 compresses the return spring 19 to store energy. During this process, the long hole of the driving pin 22 adaptively cooperates with the end of the transmission pin 17, and pushes the toggle arm 15 to rotate.

[0059] That is, the linear motion trajectory of the driving pin 22 is converted into the rotational motion trajectory of the toggle arm 15. When the roller 7 reaches the flat surface at the wedge top of the wedge block 18, the mechanism reaches the pumping position and stops moving. The rotation of the toggle arm 15 drives the rotation control rod of the auxiliary switch 13 to rotate. At this time, the contact state of the auxiliary switch 13 is converted, and the preset state of reaching the pumping position is output.

[0060] The movement direction of Phase B is opposite to that of Phase A. The contacts of the auxiliary switch 13 of Phase B also undergo a synchronous state conversion, outputting a preset state indicating the arrival at the pumping position. Considering the possible failure of mechanical transmission, the contacts at the same position of the auxiliary switches 13 of Phase A and Phase B are connected in series to send a position signal for the pumping position. That is, only when the ball screw pairs 5 of both Phase A and Phase B reach the pumping position can the position signal for the pumping position be sent. At this time, the main contacts of the phase-change disconnector for Phase A and Phase B have reached the preset pumping position and can conduct current reliably.

[0061] The operation of Phase C is exactly the same as that of Phase A. The contacts of the auxiliary switch 13 of Phase C also undergo a synchronous state conversion, outputting a preset state indicating the arrival at the closing position.

[0062] Embodiment 4 In this embodiment, the three-phase drive device includes a Phase A drive device 1, a Phase B drive device 2, and a Phase C drive device 3. After the mechanism receives the pumping-isolation instruction, taking the operation of Phase A as an example, the roller 7 moves upward along with the ball screw pair 5. The roller 7 gradually moves from the plane at the wedge top L of the wedge block 18 towards the wedge surface with an inclination angle α. The pre-charged return spring 19 always applies a thrust to the wedge block 18 along the axes of the drive pin 22 and the guide pin 20 under the action of the elastic deformation force. As the roller 7 gradually disengages from the wedge surface of the wedge block 18, the drive pin 22 drives the toggle arm 15 to rotate in the reverse direction through the transmission pin 17. When the roller 7 is completely disengaged from the wedge surface of the wedge block 18, the toggle arm 15 has been reset, and thus the rotating control rod of the auxiliary switch 13 has also been reset. At this time, the outer side of the transmission pin 17 is in contact with the other side of the arc edge of the square hole provided on the auxiliary switch mounting plate 14 for limiting, and the movement stops. At the same time, the drive pin 22 cooperating with the outer side of the transmission pin 17 is also limited and stops moving.

[0063] Except for the opposite movement direction, the rest of the operation process of Phase B is exactly the same as that of Phase A. The contacts of the auxiliary switch 13 of Phase B also undergo a synchronous state conversion, outputting a preset state indicating the arrival at the isolation position. Considering the possible failure of mechanical transmission, the contacts at the same position of the auxiliary switches 13 of Phase A and Phase B are connected in series to send a position signal for the isolation position. Similarly, only when the ball screw pairs 5 of both Phase A and Phase B reach the isolation position can the position signal for the isolation position be sent. At this time, the main contacts of the phase-change disconnector for Phase A and Phase B have reached the preset isolation position.

[0064] The operation of Phase C is exactly the same as that of Phase B. The contacts of the auxiliary switch 13 of Phase C also undergo a synchronous state conversion, outputting a preset state indicating the arrival at the opening position.

[0065] The pumping energy storage control and signal system can determine the position of the disconnector in the phase conversion section only after receiving the position signals of phase A, phase B, and phase C. This position signal serves as an important auxiliary criterion for the control and signal system and can meet the requirements of the system for the reliability of this signal.

[0066] Furthermore, a plurality of long holes with a length of x are provided on the auxiliary switch mounting plate 14, which has an adjustment function. When the roller 7 reaches the plane at the wedge-shaped top of the wedge block 18, the outer side of the transmission pin 17 closely adheres to one side edge corresponding to the square hole provided on the auxiliary switch mounting plate 14. Obviously, the starting position of the toggle arm 15 can be determined. When the roller 7 moves away from the wedge block 18, under the combined action of the restoring force of the return spring 19 and the limitation of the other side edge corresponding to the square hole provided on the auxiliary switch mounting plate 14, the end position of the toggle arm 15 can be determined.

[0067] In the above embodiments, the equipment components involved are all conventional equipment components unless otherwise specified. The structural setting methods, working methods, or control methods involved are all conventional setting methods, working methods, or control methods in this field unless otherwise specified.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A position signal device, characterized in that, Comprising: A guiding block (10), mounting plates (9) are mounted on both sides of the guiding block (10), a through hole is formed in the guiding block (10), a driving pin (22) is arranged in the through hole of the guiding block (10), one end of the driving pin (22) is connected with a transmission pin (17), and the other end is connected with a wedge-shaped block (18); on the side of the mounting plate (9) facing away from the guiding block (10), an auxiliary switch mounting plate (14) is connected, at the other end of the auxiliary switch mounting plate (14) away from the mounting plate (9), an auxiliary switch (13) is connected, and the auxiliary switch (13) has a protruding rotation control rod; the transmission pin (17) is connected with an oscillating arm (15), and the axial direction of the oscillating arm (15) is perpendicular to the axial direction of the transmission pin (17); the rotation control rod passes through the auxiliary switch mounting plate (14) and is connected with the middle part of the oscillating arm (15); an elastic member is arranged between the guiding block (10) and the wedge-shaped block (18).

2. The position signal device according to claim 1, wherein A long hole is formed at the end of the driving pin (22); the long axis axial direction of the long hole is perpendicular to the axial direction of the driving pin (22); the transmission pin (17) is arranged in the long hole.

3. The position signal device according to claim 1, wherein The axial direction of the oscillating arm (15) intersects with the projection of the axial direction of the driving pin (22) on the horizontal plane.

4. A position signal device according to claim 1, characterized in that, A bushing is arranged in the through hole of the guiding block (10), and the driving pin (22) is arranged in the bushing.

5. A position signal device according to claim 1, characterized in that, The bushing includes a first bushing (21) and a second bushing (23), the driving pin (22) is arranged in the second bushing (23), a guiding pin (20) is arranged in the first bushing (21), and the guiding pin (20) is connected with the wedge-shaped block (18).

6. The position signal device according to claim 5, wherein The number of the first bushings (21) is two, which are respectively arranged on both sides of the second bushing (23); a return spring (19) is sleeved on the guiding pin (20).

7. The position signal device according to claim 1, wherein A square hole is formed in the auxiliary switch mounting plate (14), and the rotation control rod passes through the square hole; one side of the square hole is arc-shaped, and the side surface of the transmission pin (17) is in contact with the arc-shaped side of the square hole.

8. A position signal device according to claim 1, wherein The transmission pin (17) passes through the oscillating arm (15), and a nylon nut (16) is mounted on each side of the transmission pin (17) on both sides of the oscillating arm (15).

9. A method for using a position signal device according to any one of claims 1 to 8, characterized in that, Including the following steps: When it is necessary to change the auxiliary switch (13) to the first state, push the wedge-shaped block (18), drive the driving pin (22) to move, make the transmission pin (17) rotate around the rotation control rod of the auxiliary switch (13) through the driving pin (22), and drive the oscillating arm (15) to rotate the rotation control rod through the transmission pin (17); When it is necessary to change the auxiliary switch (13) to the second state, stop pushing the wedge-shaped block (18), make the wedge-shaped block (18) rebound through the elastic member, drive the driving pin (22) and the transmission pin (17), and drive the oscillating arm (15) to rotate the rotation control rod through the transmission pin (17).

10. An isolating switch mechanism for phase change, characterized in that, It includes a three-phase drive device, and a position signal device according to any one of claims 1 to 8 is mounted on the side of the three-phase drive device through a mounting plate (9); a ball screw pair (5) is installed in the three-phase drive device, an auxiliary switch driving plate (6) is sleeved on the ball screw pair (5), the auxiliary switch driving plate (6) is threadedly connected to the ball screw pair (5), and a roller (7) is connected to the side of the auxiliary switch driving plate (6); a strip-shaped groove is formed in the side of the three-phase drive device, the wedge-shaped block (18) faces the strip-shaped groove, and the roller (7) extends out from the strip-shaped groove.

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