A switch-on and switch-off mechanism and a high-voltage phase-controlled contactor

Abstract

The present invention belongs to the technical field of electrical equipment, and specifically relates to a switch-on and switch-off mechanism and a high-voltage phase-controlled contactor. The switch-on and switch-off mechanism includes a base, a static iron core, a connecting rod, a moving iron core, an excitation coil and an indicator; the static iron core is installed on the lower side of the base, the base and the static iron core are provided with through holes, the connecting rod passes through the through holes and slides with the through holes; the moving iron core is installed on the connecting rod, and the excitation coil is provided between the moving iron core and the static iron core; the indicator is installed on the upper side of the base and is connected to the connecting rod. The high-voltage phase-controlled contactor includes a frame, an insulating pole, a vacuum switch, an insulator, a closing spring and the switch-on and switch-off mechanism. The indicator of the present invention indicates the switch-on and switch-off status by the displacement of the connecting rod, and each indicator can independently indicate the switch-on and switch-off status, has a compact structure, and is sensitive in action. It will not have any effect on the accuracy and stability of the switch-on and switch-off time, and can meet the use requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical equipment, and in particular, relates to a switch-on and switch-off mechanism and a high-voltage phase-controlled contactor. Background Art

[0002] High-voltage phase-controlled contactors need indicators to indicate whether the switch state of the high-voltage phase-controlled contactors is in the closed state or the open state. Since the high-voltage phase-controlled contactors are three-phase separately opened and closed, and the opening and closing time accuracy and time stability are very high, the indicator is required to indicate the three-phase opening and closing state, and not block the action sensitivity and opening and closing time accuracy of the opening and closing.

[0003] The indicator of the existing high-voltage phase-controlled contactor is three-phase linked, with a complex structure. The volume and mass factors affect the accuracy and stability of the opening and closing time, and it cannot meet the increasing use requirements. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a switch-on / off mechanism and a high-voltage phase-controlled contactor, and the technical solution thereof is as follows:

[0005] A switch-on / off mechanism for a high-voltage phase-controlled contactor comprises a base, a static iron core, a connecting rod, a moving iron core, an excitation coil and an indicator; the static iron core is mounted on the lower side of the base, the base and the static iron core are provided with through holes, the connecting rod passes through the through holes and slidably cooperates with the through holes; the moving iron core is mounted on the connecting rod, the excitation coil is provided between the moving iron core and the static iron core, the excitation coil is used to excite or demagnetize the static iron core and the moving iron core; the indicator is mounted on the upper side of the base and is connected to the connecting rod, and is used to indicate the switch-on / off state by relying on the displacement of the connecting rod.

[0006] The opening and closing mechanism as described above is further preferably configured as follows: a shoulder is provided on the connecting rod, the shoulder is located above the through hole, the diameter of the shoulder is larger than the diameter of the through hole, and the lower end surface of the shoulder is used to limit the connecting rod when opening the switch.

[0007] The opening and closing mechanism as described above is further preferably: the indicator includes a shield, a pointer and a torsion spring; the shield is mounted on the base, and a viewport for displaying the opening and closing status is provided on the shield; the pointer is rotatably mounted on the shield through a pin shaft, a first end of the pointer abuts against an upper end surface of the shoulder, and a second end is provided with an indicator plate; the indicator plate corresponds to the viewport, and is used to display the opening and closing status to the outside world through the viewport; the torsion spring is mounted on the pin shaft, a first end is fixedly connected to the shield, and a second end abuts against the pointer, and is used to provide a torque to make the pointer abut against the upper end surface of the shoulder.

[0008] The opening and closing mechanism as described above is further preferably: the indicator board includes a first indicator wall and a second indicator wall, the first indicator wall is used to indicate the closing state, and the second indicator wall is used to indicate the opening state; the first indicator wall and the second indicator wall form a V-shape with an opening toward the pointer, and the angle range is 140° to 160°; the swing angle range of the second end of the pointer is 20° to 40°, and is symmetrical about the horizontal plane; the axis of the pin shaft coincides with the symmetry plane in the height direction of the viewport.

[0009] The opening and closing mechanism as described above is further preferably configured such that: along the bottom to the top of the V-shape, the length of the first indicator wall is greater than the length of the viewport, and the width of the first indicator wall is greater than the width of the viewport.

[0010] The opening and closing mechanism as described above is further preferably configured such that: along the bottom to the top of the V-shape, the length of the second indicator wall is greater than the length of the viewport, and the width of the second indicator wall is greater than the width of the viewport.

[0011] The above-mentioned opening and closing mechanism is further preferably configured such that: a fitting section is provided at the first end of the pointer, and the outer contour of the fitting section is arc-shaped for fitting with the upper end surface of the shaft shoulder.

[0012] The opening and closing mechanism as described above is further preferably further provided with an opening spring, wherein the opening spring is sleeved on the outside of the connecting rod and is located between the moving iron core and the static iron core, and is used for storing energy when closing the switch and releasing energy when opening the switch.

[0013] A high-voltage phase-controlled contactor comprises a frame, an insulating pole, a vacuum switch, an insulator, a closing spring and the opening and closing mechanism; the insulating pole is mounted on the frame, and the vacuum switch is mounted in the insulating pole; the base is mounted on the frame, and the insulator is mounted on the first end of the connecting rod; the closing spring is mounted in the insulator and is used to connect the vacuum switch to provide closing pressure.

[0014] The high-voltage phase-controlled contactor as described above is further preferably configured such that: the number of the insulating pole, the vacuum switch, the insulator, the closing spring and the opening and closing mechanism are all three and correspond to each other.

[0015] The high-voltage phase-controlled contactor as described above is further preferably further provided with a buffer, wherein the buffer is mounted on the frame, a first end of the buffer is connected to the frame, and a second end of the buffer is used to cooperate with the second end of the connecting rod to eliminate opening rebound.

[0016] The high-voltage phase-controlled contactor as described above is further preferably provided with: a shock absorbing body installed in the closing spring to reduce closing bounce; the shock absorbing body is made of non-Newtonian fluid material.

[0017] It can be seen from the analysis that compared with the prior art, the advantages and beneficial effects of the present invention are:

[0018] The indicator of the present invention indicates the opening and closing state by the displacement of the connecting rod. Each indicator can independently indicate the opening and closing state. It has a compact structure and sensitive action. It will not have any influence on the opening and closing time accuracy and stability, and can meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the opening and closing mechanism of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the indicator of the present invention;

[0021] Figure 3 It is a front view of the indicator of the present invention;

[0022] Figure 4 It is a schematic diagram of the closing state of the opening and closing mechanism of the present invention;

[0023] Figure 5 It is a schematic diagram of the opening state of the opening and closing mechanism of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the high-voltage phase-controlled contactor of the present invention.

[0025] In the figure: 1-connecting rod; 2-indicator; 3-base; 4-static iron core; 5-moving iron core; 6-shield; 7-pin shaft; 8-viewport; 9-torsion spring; 10-pointer; 11-shaft shoulder; 12-matching section; 13-first indicator wall; 14-second indicator wall; 15-vacuum switch; 16-insulating pole; 17-insulator; 18-frame; 19-buffer. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] Please refer to Figures 1 to 6 ,in, Figure 1 It is a structural schematic diagram of the opening and closing mechanism of the present invention; Figure 2 It is a structural schematic diagram of the indicator of the present invention; Figure 3 It is a front view of the indicator of the present invention; Figure 4 It is a schematic diagram of the closing state of the opening and closing mechanism of the present invention; Figure 5 It is a schematic diagram of the opening state of the opening and closing mechanism of the present invention; Figure 6 It is a structural schematic diagram of the high-voltage phase-controlled contactor of the present invention.

[0029] like Figure 1 As shown, in one embodiment of the present invention, a switch-on and switch-off mechanism is provided. The switch-on and switch-off mechanism of this embodiment is mainly used as a component and is suitable for high-voltage phase-controlled contactors. Specifically, the switch-on and switch-off mechanism includes a base 3, a static iron core 4, a connecting rod 1, a moving iron core 5, an excitation coil and an indicator 2. Among them, the static iron core 4 is installed on the lower side of the base 3, and the base 3 and the static iron core 4 are provided with through holes, and the connecting rod 1 passes through the through holes and slides with the through holes. The moving iron core 5 is installed on the connecting rod 1, and an excitation coil is provided between the moving iron core 5 and the static iron core 4, and the excitation coil can excite or demagnetize the static iron core 4 and the moving iron core 5. The indicator 2 is installed on the upper side of the base 3 and is connected to the connecting rod 1, and can indicate the switch-on and switch-off state by the displacement of the connecting rod 1.

[0030] The opening and closing mechanism of this embodiment can be used for the opening and closing of high-voltage phase-controlled contactors. When closing, under the action of the excitation coil, the moving iron core 5 and the static iron core 4 are combined, and the moving iron core 5 can drive the connecting rod 1 to move toward the static iron core 4. When the connecting rod 1 moves, it drives the indicator 2, and then it can indicate the closing state; when opening, under the action of the excitation coil, the moving iron core 5 and the static iron core 4 are separated, and the connecting rod 1 moves away from the static iron core 4. When the connecting rod 1 moves, it drives the indicator 2, and then it can indicate the opening state. In this embodiment, the indicator 2 indicates the opening and closing state by the displacement of the connecting rod 1. When used for high-voltage phase-controlled contactors, each indicator 2 can independently indicate the opening and closing state. It has a compact structure and sensitive action. It will not have any effect on the accuracy and stability of the opening and closing time, and can meet the use requirements.

[0031] like Figures 2 to 4 As shown, in one embodiment of the present invention, a shoulder 11 is provided on the connecting rod 1, and the shoulder 11 is located above the through hole, and its diameter is greater than the diameter of the through hole. When the gate is opened, the connecting rod 1 follows the moving iron core 5 away from the static iron core 4. When the lower end surface of the shoulder 11 is in contact with the upper end surface of the through hole, the movement of the connecting rod 1 is prevented, and the shoulder 11 can play a role in limiting the displacement of the connecting rod 1 when the gate is opened. At the same time, the indicator 2 includes a shield 6, a pointer 10 and a torsion spring 9. The shield 6 is mounted on the base 3, and a viewport 8 for displaying the opening and closing state is provided on the shield 6. The pointer 10 is rotatably mounted on the shield 6 through the pin 7, and the first end of the pointer 10 is against the upper end surface of the shoulder 11, and the second end of the pointer 10 is provided with a display plate. The torsion spring 9 is mounted on the pin 7, and the first end is fixedly connected to the shield 6, and the second end is against the pointer 10, which can provide torque to make the pointer 10 against the upper end surface of the shoulder 11. When the switch is opened or closed, the connecting rod 1 is displaced, and the upper end surface of the shoulder 11 drives the pointer 10 to move. The indicator board at the second end of the pointer 10 corresponds to the viewport 8, so that different parts of the indicator board can be displayed to the outside world through the viewport 8 during movement, thereby indicating whether the switch is currently in the open state or the closed state.

[0032] Furthermore, in this embodiment, the torsion spring 9 is a small torque torsion spring 9, and the torque is slightly larger than the self-weight of the second end of the pointer 10, so that the first end of the pointer 10 can always fit the upper end surface of the shoulder 11, thereby not having a negative impact on the displacement accuracy and time of the connecting rod 1.

[0033] like Figure 4 and Figure 5As shown, in one embodiment of the present invention, the indicator board includes a first indicator wall 13 and a second indicator wall 14. When in use, the first indicator wall 13 is used to indicate the closed state, and the second indicator wall 14 is used to indicate the open state. Specifically, in this embodiment, the axis of the pin shaft 7 coincides with the symmetry plane in the height direction of the viewport 8. When opening and closing, the swing angle of the second end of the pointer 10 is symmetrical about the horizontal plane (swinging from above the horizontal plane to below the horizontal plane when closing, and swinging from below the horizontal plane to above the horizontal plane when opening). The first indicator wall 13 and the second indicator wall 14 form a V-shape with an opening toward the pointer 10, and the included angle range is 140° to 160°, for example, it can be 140°, 141°, 142°, 143°, 144°, 145°, 146°, 147°, 148°, 149°, 150°, 151°, 152°, 153°, 154°, 155°, 156°, 157°, 158°, 159°, 160°, or any intermediate value between any two adjacent endpoint values ​​mentioned above. Correspondingly, the swing angle range of the second end of the pointer 10 is 20° to 40°, for example, it can be 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, or any intermediate value between any two adjacent end values ​​mentioned above. The angle design of the first indicator wall 13 and the second indicator wall 14 is associated with the swing angle design of the second end of the pointer 10, so that when the first indicator wall 13 or the second indicator wall 14 displays the opening and closing state through the viewport 8, the angle between the plane where the first indicator wall 13 is located and the plane where the viewport 8 is located, and the angle between the plane where the second indicator wall 14 is located and the plane where the viewport 8 is located are both acute angles less than 10°, which can clearly indicate the opening and closing state.

[0034] Further, in this embodiment, along the bottom to the top of the V-shape, the length of the first indication wall 13 is greater than the length of the viewport 8, and the width of the first indication wall 13 is greater than the width of the viewport 8, which can prevent the second indication wall 14 from affecting the judgment when indicating the closed state. Along the bottom to the top of the V-shape, the length of the second indication wall 14 is greater than the length of the viewport 8, and the width of the second indication wall 14 is greater than the width of the viewport 8, which can prevent the first indication wall 13 from affecting the judgment when indicating the open state.

[0035] Furthermore, in this embodiment, the first indicator wall 13 is a red indicator panel, and the second indicator wall 14 is a green indicator panel. When closing, the connecting rod 1 moves upward to drive the pointer 10 to rotate, and the red indicator panel of the pointer 10 can be observed to be displayed in the viewport 8 of the shield 6, indicating that the current high-voltage phase-controlled contactor is in the closing position. When opening, the connecting rod 1 moves downward to drive the pointer 10 to rotate, and the green indicator panel of the pointer 10 can be observed to be displayed in the viewport 8 of the shield 6, indicating that the current high-voltage phase-controlled contactor is in the opening position.

[0036] like Figure 4 As shown, in one embodiment of the present invention, a first end portion of the pointer 10 is provided with a mating section 12, and the pointer 10 is fitted with the upper end surface of the shoulder 11 through the mating section 12. Specifically, the outer contour of the mating section 12 is arc-shaped and fits with the upper end surface of the shoulder 11. When the shoulder 11 moves, the outer contour of the mating section 12 used to fit with the upper end surface of the shoulder 11 has no sharp corners or sudden changes, and will not block the movement of the shoulder 11, thereby not affecting the accuracy and stability of the opening and closing time, and can also prevent the pointer 10 from failing due to getting stuck.

[0037] like Figure 1 As shown, in one embodiment of the present invention, a trip spring is also included. Specifically, the trip spring is sleeved on the outside of the connecting rod 1 and is located between the moving iron core 5 and the static iron core 4. In the closed state, the trip spring is compressed to store elastic potential energy. When the gate is opened, the elastic potential energy is gradually released and converted into kinetic energy when the connecting rod 1 slides, which can ensure the reliability of the gate opening, ensure that the moving iron core 5 and the static iron core 4 can be separated in time when the gate is opened, and ensure that the connecting rod 1 moves in place.

[0038] Furthermore, in this embodiment, the compression amount of the opening spring is greater than the sliding stroke of the connecting rod 1. During operation, whether opening or closing, the opening spring is always in a compressed state, which can ensure that the connecting rod 1 moves in place when opening.

[0039] Based on the above-mentioned opening and closing mechanism, the present invention further provides a high-voltage phase-controlled contactor. Since the high-voltage phase-controlled contactor includes the opening and closing mechanism, the high-voltage phase-controlled contactor has all the advantages of the above-mentioned embodiments.

[0040] like Figure 6 As shown, in one embodiment of the present invention, a high-voltage phase-controlled contactor is provided, comprising a frame 18, an insulating pole 16, a vacuum switch 15, an insulator 17, a closing spring and a switch-on and switch-off mechanism. The insulating pole 16 is mounted on the frame 18, and the vacuum switch 15 is mounted in the insulating pole 16. The switch-on and switch-off mechanism is mounted on the frame 18 through a base 3, and is located below the vacuum switch 15. The insulator 17 is mounted on the first end of the connecting rod 1, and the closing spring is mounted in the insulator 17, which is used to connect the vacuum switch 15 and provide a closing pressure.

[0041] In this embodiment, there are three insulating poles 16, vacuum switches 15, insulators 17, closing springs and opening and closing mechanisms, and they correspond one to one. Each phase of the high-voltage phase-controlled contactor is independently equipped with an indicator 2, which can display the opening and closing status of each phase of the high-voltage phase-controlled contactor respectively, without any impact on the opening and closing time accuracy and stability, and can meet the use requirements.

[0042] like Figure 6As shown, in one embodiment of the present invention, a buffer 19 is further included. The buffer 19 is mounted on the frame 18. The first end of the buffer 19 is connected to the frame 18, and the second end of the buffer 19 is used to cooperate with the second end of the connecting rod 1 to eliminate the rebound of the opening switch. In this embodiment, the second end of the connecting rod 1 cooperates with the buffer 19. During the contact process between the connecting rod 1 and the buffer 19, the kinetic energy of the connecting rod 1 is gradually absorbed by the buffer 19, thereby avoiding the rebound of the connecting rod 1 when it stops moving suddenly, reducing or even eliminating the rebound of the opening switch.

[0043] like Figure 6 As shown, in one embodiment of the present invention, a shock absorbing body is also included. The shock absorbing body is made of non-Newtonian fluid material and can quickly absorb the collision energy during closing. Specifically, the shock absorbing body is installed in the closing spring. When in use, the shock absorbing body can absorb the energy of the collision during closing (the collision between the closing spring and the contact of the vacuum switch 15), making the closing process smoother, thereby reducing or even eliminating the bounce between the closing spring and the vacuum switch 15 during closing.

[0044] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A switch-on and switch-off mechanism for a high-voltage phase-controlled contactor, characterized in that: include: Base, static iron core, connecting rod, moving iron core, excitation coil and indicator; The static iron core is installed on the lower side of the base, the base and the static iron core are provided with through holes, the connecting rod passes through the through holes and is slidably matched with the through holes; The moving iron core is installed on the connecting rod, and the excitation coil is arranged between the moving iron core and the static iron core, and the excitation coil is used to excite or demagnetize the static iron core and the moving iron core; The indicator is installed on the upper side of the base and connected to the connecting rod, and is used to indicate the opening and closing state by relying on the displacement of the connecting rod; The connecting rod is provided with a shaft shoulder, the shaft shoulder is located above the through hole, the diameter of the shaft shoulder is larger than the diameter of the through hole, and the lower end surface of the shaft shoulder is used to limit the connecting rod when the gate is opened; The indicator comprises a shield, a pointer and a torsion spring; The protective cover is installed on the base, and a viewport for displaying the opening and closing status is provided on the protective cover; The pointer is rotatably mounted on the shield via a pin, the first end of the pointer abuts against the upper end surface of the shaft shoulder, and the second end is provided with an indicator plate; The display board corresponds to the viewport and is used to display the opening and closing status to the outside world through the viewport; The torsion spring is installed on the pin shaft, with the first end fixedly connected to the shield and the second end against the pointer, and is used to provide torque to make the pointer against the upper end surface of the shaft shoulder; the torque of the torsion spring is slightly greater than the self-weight of the second end of the pointer; The indicator board includes a first indicator wall and a second indicator wall, wherein the first indicator wall is used to indicate the closed state, and the second indicator wall is used to indicate the open state; The first indicator wall and the second indicator wall form a V-shape with an opening toward the pointer, and an included angle ranges from 140° to 160°; The swing angle of the second end of the pointer ranges from 20° to 40° and is symmetrical about the horizontal plane; The axis of the pin coincides with the symmetry plane in the height direction of the viewport; When opening and closing the switch, the swing angle of the second end of the pointer is symmetrical about the horizontal plane; the angle between the plane where the first indicator wall is located and the plane where the viewport is located, and the angle between the plane where the second indicator wall is located and the plane where the viewport is located are both acute angles less than 10°.

2. The opening and closing mechanism according to claim 1, characterized in that: From the bottom to the top of the V-shape, the length of the first display wall is greater than the length of the viewport, and the width of the first display wall is greater than the width of the viewport; Along the bottom to the top of the V-shape, the length of the second display wall is greater than the length of the viewport, and the width of the second display wall is greater than the width of the viewport.

3. The opening and closing mechanism according to claim 1, characterized in that: The first end of the pointer is provided with a matching section, and the outer contour of the matching section is arc-shaped and is used to fit with the upper end surface of the shaft shoulder.

4. The opening and closing mechanism according to claim 1, characterized in that: It also includes a switch-off spring, which is sleeved on the outside of the connecting rod and located between the moving iron core and the static iron core, and is used for storing energy when closing the switch and releasing energy when opening the switch.

5. A high voltage phase-controlled contactor, characterized in that: include: A frame, an insulating pole, a vacuum switch, an insulator, a closing spring and a closing and opening mechanism according to any one of claims 1 to 4; The insulating pole is installed on the frame, and the vacuum switch is installed in the insulating pole; The base is mounted on the frame, and the insulator is mounted on the first end of the connecting rod; The closing spring is installed in the insulator and is used to connect the vacuum switch to provide closing pressure.

6. The high voltage phase-controlled contactor according to claim 5, characterized in that: It also includes a buffer, which is installed on the frame, with a first end of the buffer connected to the frame, and a second end of the buffer used to cooperate with the second end of the connecting rod to eliminate the rebound of the opening switch.

7. The high voltage phase-controlled contactor according to claim 5, characterized in that: It also includes a shock absorbing body, which is installed in the closing spring and is used to reduce the closing bounce; The shock absorbing body is made of non-Newtonian fluid material.

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