Knife switch state detection device and knife switch with same
By designing a knife switch detection device including a rotating shaft, gear and magnetic steel, and using magnetic field detection to confirm the rotation angle of the magnetic steel, the problem of low efficiency and accuracy of detection point position adjustment in the prior art is solved, and efficient and accurate detection point calibration is achieved.
Patent Information
- Application Number
- CN202420591287.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-25
AI Technical Summary
During the debugging and detection process of the existing knife switch status detection device, the position adjustment efficiency and accuracy are low, especially after closing, the position of the detection point cannot be adjusted, resulting in inaccurate detection.
A detection device including a housing, a rotating shaft, a gear and a magnetic steel is designed. By connecting the knife switch to the rotating shaft, and converting the rotation into the rotation of the magnetic steel through the gear system, the rotation angle of the magnetic steel is confirmed by using the magnetic field detection device to determine the position of the detection point.
The position of the sensor detection point is calibrated during a complete opening and closing process, and there is no need to open the gate again after closing, which significantly improves the adjustment efficiency and accuracy.
Smart Images
Figure CN222579186U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of knife switch state detection, in particular to a knife switch state detection device and a knife switch with the same. Background Art
[0002] The knife switch equipment of the power system usually requires double confirmation detection of the knife switch position for the open and closed states of the knife switch, that is, not only the open and closed states of the knife switch need to be detected by switching the knife switch itself, but also a secondary detection is required through a non-homologous device. In the current field of knife switch equipment, the opening and closing of the knife switch are mostly carried out in a rotating manner. The knife switch control rod is the nearest level of the knife switch input. Installing a secondary detection device on it can ensure the reliability of the feedback signal. There are many manufacturers of knife switches at present. There is no unified standard for the specifications of knife switch control rods, the rotation angles of knife switches are also not uniform, and most knife switches are located high above the ground, which makes it difficult to install the detection device in the appropriate position in one debugging, and multiple debugging is required; in addition, after some knife switches are closed and energized, they cannot be opened at will due to the need to maintain power requirements. Since the installation location of the detection device is close to the energized body, there is no way to adjust the position of the detection point after the knife switch is closed, and it is often impossible to detect it. It can only be adjusted when it is opened. It is difficult to adjust the detection point of the closed position to a precise position in a process of opening and closing. These two factors lead to low position adjustment efficiency and adjustment accuracy of the inspection point. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a knife switch detection device, which can reduce the number of debugging times and can accurately adjust the position of the detection point of the closing position.
[0004] In a first aspect, an embodiment of the utility model provides a knife switch detection device, comprising:
[0005] The housing comprises an upper cover and a bottom shell; the upper cover is arranged on the bottom shell, a receiving cavity is arranged inside the bottom shell, and a through hole is arranged at the bottom of the bottom shell;
[0006] A rotating shaft is arranged in the accommodating cavity; the rotating shaft passes through the through hole and is transmission-connected to the knife switch;
[0007] A first gear, wherein the first gear has a central opening; the first gear is sleeved on the rotating shaft through the opening, and the rotating shaft can drive the first gear to rotate when rotating;
[0008] A plurality of second gears, each of which is meshed with the first gear, and can drive the second gear to rotate when the first gear rotates;
[0009] A magnetic steel is arranged at the axis of the second gear, and the magnetic steel rotates coaxially with the second gear;
[0010] A mainboard is arranged in the shell; a magnetic field detection device is arranged on the mainboard, and the magnetic field detection device is located directly above the magnetic steel; the magnetic field detection device is used to detect the rotation angle of the magnetic steel.
[0011] In some embodiments of the utility model, an annular groove is provided on the side of the rotating shaft; a first sealing ring is sleeved in the annular groove.
[0012] In some embodiments of the present invention, a screw hole is provided at one end of the rotating shaft base passing through the through hole.
[0013] In some embodiments of the present invention, a side wall of the bottom shell is provided with a wire outlet, and a waterproof connector is connected to the wire outlet.
[0014] In some embodiments of the utility model, a first fixing frame is provided in the accommodating cavity, and a fixing hole is provided on the first fixing frame; one end of the rotating shaft located in the accommodating cavity is clamped in the fixing hole.
[0015] In some embodiments of the utility model, a gear fixing plate is further provided in the accommodating cavity, and a mounting hole is provided on the gear fixing plate; the axis center of the upper surface of the first gear and the axis center of the upper surface of the second gear are embedded in the mounting hole; the first gear and the second gear are arranged under the gear fixing plate.
[0016] In some embodiments of the present invention, the magnetic field detection device includes a magnetic rotary encoder.
[0017] In some embodiments of the present invention, a first groove is provided on the edge of the upper end surface of the bottom shell, and a second sealing ring is provided in the first groove.
[0018] In a second aspect, an embodiment of the utility model provides a knife switch, and the knife switch includes the knife switch detection device described in the embodiment of the above aspect.
[0019] According to the knife switch detection device of the utility model, at least the following beneficial effects are achieved: the knife switch detection device provided by the utility model connects the knife switch to the rotating shaft, and converts the rotation of the knife switch into the rotation of the magnetic steel arranged on the second gear through the first gear and the second gear, and then confirms the position change of the knife switch through the magnetic field detection device, and then confirms the position of the detection point. The utility model can calibrate the position of the sensor detection point only in a complete opening and closing process, and does not need to open the switch again after closing, thereby improving the adjustment efficiency and adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0021] Figure 1 This is a top exploded schematic diagram of a knife switch detection device according to an embodiment of the utility model;
[0022] Figure 2 This is a bottom exploded schematic diagram of the knife switch detection device according to an embodiment of the utility model;
[0023] Figure 3 This is a schematic diagram of the outer side of the knife switch detection device according to an embodiment of the utility model;
[0024] Figure numerals: outer shell 100, upper cover 110, bottom shell 120, accommodating chamber 121, through hole 122, wire outlet 130, waterproof connector 131, first groove 140, second sealing ring 141, rotating shaft 200, annular groove 210, first sealing ring 211, screw hole 220, first gear 300, opening 310, second gear 400, magnetic steel 500, main board 600, magnetic field detection device 610, first fixing frame 700, fixing hole 710, gear fixing plate 800, mounting hole 810. DETAILED DESCRIPTION
[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0027] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of the first, second or third, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0029] The knife switch detection device provided by the utility model connects the knife switch with the rotating shaft, and converts the rotation of the knife switch into the rotation of the magnetic steel arranged on the second gear through the first gear and the second gear, and then confirms the position change of the knife switch through the magnetic field detection device, and then confirms the position of the detection point. The utility model can calibrate the position of the sensor detection point in a complete opening and closing process, and does not need to open the switch again after closing, which improves the adjustment efficiency and adjustment accuracy.
[0030] The specific device of the embodiment of the utility model is described below in conjunction with the accompanying drawings.
[0031] Reference Figure 1 to Figure 3 , Figure 1 This is a top exploded schematic diagram of the knife switch detection device according to the embodiment of the utility model. Figure 21 is an exploded bottom view of a knife switch detection device according to an embodiment of the utility model, wherein the detection device specifically comprises: a housing 100, a rotating shaft 200, a first gear 300, a second gear 400, a magnetic steel 500 and a main board 600; wherein the housing 100 comprises an upper cover 110 and a bottom shell 120; the upper cover 110 is disposed on the bottom shell 120, a receiving cavity 121 is disposed inside the bottom shell 120, and a through hole 122 is disposed at the bottom of the bottom shell 120; the rotating shaft 200 is disposed in the receiving cavity 121; the rotating shaft 200 is passed through the through hole 122 and is in transmission connection with the knife switch; the first gear 300, the first gear 300 A central opening 310; the first gear 300 is sleeved on the rotating shaft 200 through the opening 310, and can drive the first gear 300 to rotate when the rotating shaft 200 rotates; the second gear 400 is meshed with the first gear 300; the magnet 500 is arranged at the axis of the second gear 400, and the magnet 500 rotates coaxially with the second gear 400; the magnetization of the magnet 500 is radial magnetization; the main board 600 is arranged in the housing 100; a magnetic field detection device 610 is arranged on the main board 600, and the magnetic field detection device 610 is located directly above the magnet 500; the magnetic field detection device 610 is used to detect the rotation angle of the magnet 500.
[0032] Among them, the rotating shaft 200, the first gear 300, the second gear 400, the magnetic steel 500 and the main board 600 are all arranged inside the accommodating cavity 121 of the bottom shell 120. The rotating shaft 200 is penetrated by the through hole 122. The through hole 122 can limit the horizontal movement of the rotating shaft 200 inside the shell 100, and can only rotate inside the shell 100, which effectively reduces the swing amplitude of the rotating shaft 200 and improves the accuracy of rotation detection. The knife switch (not shown in the figure) is connected to the rotating shaft 200, the first gear 300 is the driving gear, and the second gear 400 is the driven gear. When the knife switch is actuated, it can drive the rotating shaft 200 to rotate, and then the rotating shaft 200 drives the first gear 300 to rotate, and the first gear 300 drives the second gear 400 to rotate through the meshing relationship, and finally the magnetic steel 500 arranged at the axis of the second gear 400 rotates. Since the magnetization of the magnetic steel 500 is radial magnetization, that is, after the magnetic steel 500 is set, the magnetic field is fixed. When the magnetic steel 500 rotates, the magnetic field will also change with the rotation. Therefore, the magnetic field can be detected by the magnetic field detection device 610 to obtain the rotation angle of the magnetic steel 500, and then the actual position of the knife switch is obtained through the transmission ratio of the first gear 300 and the second gear 400 and other parameters. Finally, according to the actual position of the knife switch, the position of the sensor detection point is determined. In this way, after the knife switch is closed, the position of the sensor detection point can be directly confirmed according to the magnetic field and the parameters corresponding to the gear, without multiple opening and closing to confirm the position of the detection point. Further, the embodiment of the utility model can include multiple second gears 400, each of which is meshed with the first gear 300, and each second gear 400 is provided with a magnetic steel 500 at the axis. The position of the sensor detection point can be jointly determined by the rotation of the magnetic field of multiple magnetic steels 500, thereby improving the detection efficiency.
[0033] Reference Figure 1-2 In some embodiments of the utility model, an annular groove 210 is provided on the side of the rotating shaft 200, and a first sealing ring 211 is sleeved in the annular groove 210. Specifically, the sealing ring provided on the side of the rotating shaft 200 can improve the sealing and waterproof degree between the rotating shaft 200 and the through hole 122, so that the working state of the knife switch state detection device is more stable.
[0034] Reference Figure 1 to Figure 3 In some embodiments of the present invention, a screw hole 220 is provided at one end of the rotating shaft 200 passing through the through hole 122. Specifically, in the embodiments of the present invention, Figure 3 As shown, the knife switch can be fixed to the rotating shaft 200 through the screw hole 220 and the screw, thereby making the knife switch and the rotating shaft 200 transmission connected; the screw hole 220 can be connected to various types of knife switches through different accessories, so the knife switch detection device set up in this way has high versatility.
[0035] Reference Figure 1-2In some embodiments of the present invention, a wire outlet 130 is provided on the side wall of the bottom shell 120, and a waterproof connector 131 is connected to the wire outlet 130. Specifically, the internal circuit in the knife switch detection device is passed through the wire outlet 130 and the waterproof connector 131 to the outside of the housing 100, and the use of the waterproof connector 131 can better protect the wire outlet 130.
[0036] Reference Figure 1-2 In some embodiments of the utility model, a first fixing frame 700 is provided in the accommodating cavity 121, and a fixing hole 710 is provided on the first fixing frame 700; one end of the rotating shaft 200 located in the accommodating cavity 121 is clamped in the fixing hole 710. Specifically, the body of the first fixing frame 700 is fixed in the accommodating cavity 121, and is used to fix the rotating shaft 200 through the fixing hole 710 and the through hole 122, so as to limit the movement of the rotating shaft 200 in the horizontal and vertical directions inside the housing 100, and can only rotate inside the housing 100, which effectively reduces the swing amplitude of the rotating shaft 200 and improves the accuracy of rotation detection.
[0037] Reference Figure 1-2 In some embodiments of the present invention, a gear fixing plate 800 is further disposed in the accommodating cavity 121, and a mounting hole 810 is disposed on the gear fixing plate 800; the first gear 300 and the second gear 400 are disposed in the mounting hole 810; the first gear 300 and the second gear 400 are disposed below the mounting hole 810. Specifically, the gear fixing plate 800 is used to fix the gears to prevent the gears from shifting during the rotation process.
[0038] Reference Figure 1-2 In some embodiments of the present invention, the magnetic field detection device 610 includes a magnetic rotary encoder. Specifically, the magnetic rotary encoder can detect the magnetic poles of the magnet 500, and the detection effect is more accurate than other magnetic field detection devices 610. Furthermore, the use of the magnetic rotary encoder can set the detection accuracy according to the accuracy requirements of the knife switch.
[0039] Reference Figure 1-2 In some embodiments of the present invention, a first groove 140 is provided at the edge of the upper end surface of the bottom shell 120, and a second sealing ring 141 is provided in the first groove 140. Specifically, the second sealing ring 141 provided between the upper cover 110 and the bottom shell 120 can play a waterproof role and improve the stability of the knife switch state detection device.
[0040] In a second aspect, an embodiment of the utility model provides a knife switch, and the knife switch includes the knife switch detection device of the embodiment of the above aspect.
[0041] In the description of this specification, the description with reference to the terms "one embodiment", "further embodiments", "some specific embodiments" or "some examples" etc. means that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0042] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A knife switch detection device, characterized in that: include: The housing comprises an upper cover and a bottom shell; the upper cover is arranged on the bottom shell, a receiving cavity is arranged inside the bottom shell, and a through hole is arranged at the bottom of the bottom shell; A rotating shaft is arranged in the accommodating cavity; the rotating shaft passes through the through hole and is transmission-connected to the knife switch; A first gear, wherein the first gear has a central opening; the first gear is sleeved on the rotating shaft through the opening, and the rotating shaft can drive the first gear to rotate when rotating; A plurality of second gears, each of which is meshed with the first gear, and can drive the second gear to rotate when the first gear rotates; A magnetic steel is arranged at the axis of the second gear, and the magnetic steel rotates coaxially with the second gear; the magnetization of the magnetic steel is radial magnetization; A mainboard is arranged in the housing; a magnetic field detection device is arranged on the mainboard, and the magnetic field detection device is located directly above the magnetic steel; The magnetic field detection device is used to detect the rotation angle of the magnetic steel.
2. The knife switch detection device according to claim 1, characterized in that: An annular groove is arranged on the side surface of the rotating shaft; a first sealing ring is sleeved in the annular groove.
3. The knife switch detection device according to claim 2, characterized in that: One end of the rotating shaft base passing through the through hole is provided with a screw hole.
4. The knife switch detection device according to claim 1, characterized in that: The side wall of the bottom shell is provided with a wire outlet, and the wire outlet is connected with a waterproof connector.
5. The knife switch detection device according to claim 1, characterized in that: A first fixing frame is arranged in the accommodating cavity, and a fixing hole is arranged on the first fixing frame; one end of the rotating shaft located in the accommodating cavity is clamped in the fixing hole.
6. The knife switch detection device according to claim 1, characterized in that: A gear fixing plate is also provided in the accommodating cavity, and a mounting hole is provided on the gear fixing plate; the axis center of the upper surface of the first gear and the axis center of the upper surface of the second gear are embedded in the mounting hole; the first gear and the second gear are arranged below the gear fixing plate.
7. The knife switch detection device according to claim 1, characterized in that: The magnetic field detection device includes a magnetic rotary encoder.
8. The knife switch detection device according to claim 1, characterized in that: A first groove is arranged at the edge of the upper end surface of the bottom shell, and a second sealing ring is arranged in the first groove.
9. A knife switch, characterized in that: The knife switch comprises the knife switch detection device according to any one of claims 1-8.