CN115265340A - Device and method for measuring rotation angle of high-voltage isolating switch - Google Patents
Device and method for measuring rotation angle of high-voltage isolating switch Download PDFInfo
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- CN115265340A CN115265340A CN202210721843.5A CN202210721843A CN115265340A CN 115265340 A CN115265340 A CN 115265340A CN 202210721843 A CN202210721843 A CN 202210721843A CN 115265340 A CN115265340 A CN 115265340A
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- 238000001514 detection method Methods 0.000 claims description 41
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- 238000005259 measurement Methods 0.000 abstract description 21
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
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Abstract
A device and a method for measuring the rotation angle of a high-voltage isolating switch relate to the technical field of high-voltage isolating switches and are used for solving the problem that the rotation angle of a disconnecting link of the high-voltage isolating switch is inconvenient to measure. The high-voltage isolating switch comprises a worm, a worm wheel and a main shaft, wherein the worm is coaxially arranged with a disconnecting link rotating shaft of the high-voltage isolating switch, the worm wheel is fixed on the main shaft and is meshed with the worm, and a support is arranged on the main shaft; the tip of main shaft one end has the cam of D shape, and the cam lateral wall has contact surface, and the cam top has the test bar, and the test bar is vertical to be placed, and the cam top has the main scale of vertical placing, and the test bar top has the vernier scale of vertical placing, and vernier scale and main scale sliding connection just both constitute slide caliper, and the vernier scale keeps in contact with the test bar top under the dead weight. The invention can realize the accurate measurement of the rotation angle of the high-voltage isolating switch knife switch without electromagnetic interference.
Description
Technical Field
The invention relates to the technical field of high-voltage isolating switches, in particular to a device and a method for measuring the rotating angle of a high-voltage isolating switch.
Background
The high-voltage transmission line is switched on and off by operating the disconnecting link of the high-voltage isolating switch, and whether the disconnecting link of the high-voltage isolating switch is switched off or switched on successfully can be reflected by the rotating angle of the disconnecting link of the high-voltage isolating switch. In the prior art, a device for measuring the rotating angle of a disconnecting link of a high-voltage isolating switch is not available.
Disclosure of Invention
The invention aims to provide a device and a method for measuring the rotating angle of a high-voltage isolating switch, which are used for solving the problem of inconvenience in measuring the rotating angle of a disconnecting link of the high-voltage isolating switch.
The technical scheme adopted by the invention for solving the technical problem is as follows: the device for measuring the rotation angle of the high-voltage isolating switch comprises a worm, a worm wheel and a main shaft, wherein the worm is coaxially arranged with a disconnecting link rotating shaft of the high-voltage isolating switch, the worm wheel is fixed on the main shaft and meshed with the worm, a support is arranged on the main shaft, and the support is used for supporting the main shaft; the end part of one end of the main shaft is provided with a D-shaped cam, the side wall of the cam is provided with a contact plane, a detection rod is arranged above the cam, the detection rod is vertically arranged and moves up and down along the vertical direction, a main ruler is vertically arranged above the cam, a vernier scale is vertically arranged above the detection rod, the vernier scale is in sliding connection with the main ruler, the vernier scale and the main ruler form a vernier caliper, and the vernier scale is kept in contact with the top of the detection rod under the dead weight; when the bottom of the detection rod is in contact with the center line of the contact surface, the main scale zero scale line is superposed with the vernier scale zero scale line.
Further, the lower end of the detection rod is conical, and the bottom of the detection rod is provided with a ball.
Furthermore, a guide sleeve is arranged above the cam, and the detection rod slides up and down along the guide sleeve.
Further, one end of the spindle is provided with a rotating disc, the rotating disc and the spindle are axially connected in a sliding mode and are circumferentially and relatively fixed, a spring is arranged between the rotating disc and the adjacent support, a conductive head is arranged on the end face of one end of the rotating disc, a coil disc is arranged between the rotating disc and the cam, a conductive coil is arranged on the end face of the coil disc facing the rotating disc, and the spring acts to enable the conductive head to be in contact with the end face of the coil disc; the coil and a fixed resistor are positioned in the same current loop, and when the conductive head slides along the coil, the resistance of the coil connected into the current loop changes; the current loop also has a current meter and a voltage meter.
Furthermore, the end face of the rotating disk is also provided with two balance heads, and the conductive heads and the two balance heads are uniformly arranged on the same circumference.
Furthermore, one end of the spring is fixedly connected with the support, the other end of the spring is provided with a spring seat, and the spring seat is rotatably connected with the rotating disc.
Furthermore, the outer wall of the spring seat is provided with a limiting ring, and the limiting ring is arranged to realize relative fixation between the spring seat and the rotating disc along the axial direction.
Further, the balance head is an insulating piece.
Further, the top of the coil panel is provided with a fixing plate, the fixing plate comprises a horizontal part and a vertical part, the top of the main ruler is fixedly connected with the horizontal part of the fixing plate, and the vertical part of the fixing plate is fixedly connected with the top of the coil panel.
The invention also provides a method for measuring the rotation angle of the high-voltage isolating switch, which comprises the following steps:
(1) Driving a knife switch of the high-voltage isolating switch to be switched on or switched off, and driving a worm of the measuring device to synchronously rotate by the knife switch of the high-voltage isolating switch, so that a worm wheel rotates, and further a main shaft and a cam are driven to rotate;
(2) The cam rotates to drive the detection rod to move up and down, the rotation angles of the cam and the spindle are calculated by measuring the up-and-down movement distance of the detection rod, and finally the rotation angle of the high-voltage isolating switch is calculated by the transmission ratio between the worm wheel and the worm.
The invention has the beneficial effects that: the device and the method for measuring the rotation angle of the high-voltage isolating switch have the following advantages that:
(1) The rotation angle of the high-voltage isolating switch is led out by the arrangement of the worm gear transmission mechanism, so that the measurement and calculation are convenient; the worm gear and worm transmission mechanism has self-locking property, so that the influence on the high-voltage isolating switch can be avoided;
(2) The measurement of the rotation angle of the disconnecting link of the high-voltage isolating switch is converted into the measurement of the rotation angle of a worm wheel, the measurement of the rotation angle of the worm wheel is converted into the measurement of the rotation angle of a cam, and the measurement of the rotation angle of the cam is converted into the measurement of the linear moving distance of a detection rod, so that the measurement is convenient, and the observation is convenient;
(3) Through observing the distance that the measuring lever removed, read the reading on the slide caliper promptly, can measure the calculation to cam rotation angle, need not electrical components such as sensor, can avoid electromagnetism to the influence of sensor precision, through the cam rotation angle that obtains of calculation, combine the drive ratio of worm gear, alright know high-voltage isolator switch rotation angle.
Drawings
FIG. 1 is a top view of the present invention;
FIG. 2 is a front view of the rotating disk;
FIG. 3 is a rear view of the rotating disk;
FIG. 4 is a schematic view of the assembly of the rotating disk and the support;
FIG. 5 is a rear view of the coil disk;
FIG. 6 is a front assembly view of the coil disk, cam and sensing lever;
FIG. 7 is a schematic view of the cam of FIG. 6 after being rotated by a certain angle;
FIG. 8 is a schematic view of the lower end of the test rod;
FIG. 9 is a view showing the positional relationship between the detection lever and the contact plane when the cam is rotated by an angle β;
in the figure: 1 knife switch rotating shaft, 2 worms, 21 worm wheels, 3 spindles, 31 supports, 4 rotating disks, 41 conductive heads, 42 balance heads, 43 square holes, 44 spring seats, 45 limiting rings, 46 springs, 5 coil disks, 51 round holes, 52 coils, 53 guide sleeves, 6 cams, 61 contact planes, 7 fixing plates, 71 main scales, 72 vernier scales, 73 scale marks, 74 detection rods and 75 balls.
Detailed Description
As shown in fig. 1 to 9, the detecting device of the present invention includes a worm 2, a worm wheel 21, a spindle 3, a coil disk 5, a rotating disk 4, a cam 6 and a detecting lever 7, and the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the device for measuring the rotation angle of the high-voltage disconnecting switch comprises a worm 2, a worm wheel 21 and a main shaft 3, wherein the worm 2 is coaxially arranged with a disconnecting link rotating shaft 1 of the high-voltage disconnecting switch, the worm wheel 21 is fixed on the main shaft 3 and is meshed with the worm 2, a support 31 is arranged on the main shaft 3, and the support 31 supports the main shaft 3; the end part of one end of the spindle 3 is provided with a D-shaped cam 6, the side wall of the cam 6 is provided with a contact plane 61, a detection rod 74 is arranged above the cam 6, the detection rod 74 is vertically arranged and vertically moves up and down, a main ruler 71 is vertically arranged above the cam 6, a vernier scale 72 is vertically arranged above the detection rod 74, the vernier scale 72 is in sliding connection with the main ruler 71, the vernier scale 72 and the main ruler 71 form a vernier caliper, and the vernier scale 72 is kept in contact with the top of the detection rod 74 under the self weight; when the bottom of the detection rod 74 contacts the center line of the contact surface 61, the zero scale line of the main scale 71 coincides with the zero scale line of the vernier 72. The worm wheel 21 and the worm 2 are insulators.
When the knife switch rotating shaft 1 of the high-voltage isolating switch rotates, the worm 2 is driven to rotate synchronously, the worm wheel 21 is driven to rotate, the worm wheel 21 rotates to drive the main shaft 3 to rotate synchronously, the plurality of supports 31 are arranged along the axial direction of the main shaft 3, the main shaft 3 can be well supported, the main shaft 3 is kept in a linear state, and the main shaft 3 is rotatably connected with the supports 31. The rotation of the spindle 3 drives the cam 6 to rotate synchronously, and the contact plane 61 gradually changes from a horizontal state to an inclined state when the cam 6 rotates, and at this time, the contact plane 61 presses the detection rod 74 to move the detection rod 74 upwards. As shown in fig. 9, when the cam 6 rotates by an angle β, a contact point of the bottom of the detection lever 74 with the contact plane 61 is denoted as a point Q, the center of the cam 6 is denoted as a point O, a perpendicular line is drawn from the point O to the contact plane 61, the contact point of the perpendicular line with the contact plane 61 is denoted as a point P, that is, when the contact plane is in a horizontal state, the contact point of the bottom of the detection lever 74 with the contact plane 61 is denoted as a point P; the distance between OP is d, d is a fixed value, the distance between OQ is marked as L, and the point O, the point P and the point Q always form a right triangle, so cos beta = d/L. The reading on the vernier caliper formed by the main scale 71 and the vernier scale 72 is the distance L-d that the bar 74 moves in the vertical direction when the contact point between the bottom of the bar 74 and the contact plane 61 slides from point P to point Q. When the reading on the vernier caliper is h, L = d + h, cos β = d/(d + h), β = arcos { d/(d + h) }, which is the angle through which the cam 6, the spindle 3, and the worm wheel 21 rotate. According to the transmission ratio between the worm wheel 21 and the worm 2, the rotation angle of the worm 2, namely the rotation angle of the high-voltage disconnecting switch knife switch rotating shaft 1, can be known.
Specifically, as shown in fig. 8, the lower end of the detection rod 74 is tapered, and the bottom of the detection rod 74 has a ball 75. The ball 75 contacts the contact surface 61, and the point of contact with the P point on the ball 75 is not the same point as the point of contact with the Q point on the ball 75. Accordingly, the radius of the ball 75 is designed to be smaller, so that the error caused by the contact between different points on the ball 75 and the contact surface can be reduced. In order to guide the up and down movement of the detection lever 74, as shown in fig. 6, a guide sleeve 53 is provided above the cam 6, and the detection lever 74 slides up and down along the guide sleeve 53.
Specifically, one end of the spindle 3 is provided with a rotating disc 4, and the rotating disc 4 and the spindle 3 are axially slidably connected and circumferentially fixed relative to each other. For this purpose, the position of the main shaft 3 corresponding to the rotating disc 4 is processed into a square shape, as shown in fig. 2, a square hole 43 is provided in the center of the rotating disc 4, the position of the main shaft 3 corresponding to the square hole 43 is in plug-in fit with the square hole 43, and the main shaft 3 and the rotating disc 4 are relatively fixed along the circumferential direction and relatively slidably connected along the axial direction.
Specifically, as shown in fig. 4, a spring 46 is arranged between the rotating disk 4 and the adjacent support 31, a conductive head 41 is arranged on the end face of one end of the rotating disk 4, as shown in fig. 1, the coil disk 5 is arranged between the rotating disk 4 and the cam 6, as shown in fig. 5, a conductive coil 52 is arranged on the end face of the coil disk 5 facing the rotating disk 4, the overall length of the conductive coil 52 is adapted to the length of the movement of the conductive head 41 relative to the coil disk, and the spring 46 acts to make the conductive head 41 contact with the end face of the coil disk 5; the coil 52 and a fixed resistor are positioned in the same current loop, and when the conductive head 41 slides along the coil 52, the resistance of the coil 52 connected into the current loop changes; the current loop also has a current meter and a voltage meter.
Specifically, the end face of the rotating disk 4 also has two balance heads 42, and the conductive head 41 and the two balance heads 42 are uniformly arranged on the same circumference. The balancing head 42 is arranged to wear together with the contact head 41 and to contact the coil disc together, on the one hand to ensure that the rotating disc 4 is kept parallel to the support 31 and the coil disc 5, and on the other hand to ensure the accuracy of the contact head 41 with the coil 52. As shown in fig. 3, one end of the spring 46 is fixedly connected to the holder 31, and the other end of the spring 46 has a spring seat 44, and the spring seat 44 is rotatably connected to the rotary disk 5. The spring seat 44 is annular, the outer wall of the spring seat 44 is provided with a limiting ring 45, and the limiting ring 45 is arranged to realize the relative fixation between the spring seat 44 and the rotating disc 4 along the axial direction. When the rotating disk 4 rotates, the spring seat 44 does not affect the rotation of the rotating disk 4, and can provide a guarantee for the contact between the conductive head 41 and the coil disk 5. The balance head 42 is an insulator. As shown in fig. 6, the top of the coil panel 5 is provided with a fixing plate 7, the fixing plate 7 comprises a horizontal part and a vertical part, the top of the main ruler 71 is fixedly connected with the horizontal part of the fixing plate 7, and the vertical part of the fixing plate 7 is fixedly connected with the top of the coil panel 5.
A method for measuring the rotation angle of a high-voltage isolating switch comprises the following steps:
(1) Driving a knife switch of the high-voltage isolating switch to be switched on or switched off, and driving a worm of the measuring device to synchronously rotate by the knife switch of the high-voltage isolating switch, so that a worm wheel rotates, and further a main shaft and a cam are driven to rotate;
(2) The cam rotates to drive the detection rod to move up and down, the rotation angles of the cam and the spindle are calculated by measuring the up-and-down movement distance of the detection rod, and finally the rotation angle of the high-voltage isolating switch is calculated by the transmission ratio between the worm wheel and the worm.
The invention realizes the leading-out of the rotation angle of the high-voltage isolating switch knife switch by the arrangement of the worm gear transmission mechanism so as to be convenient for measurement and calculation; the worm gear and worm transmission mechanism has self-locking property, so that the influence on the high-voltage isolating switch can be avoided; the measurement of the rotation angle of the disconnecting link of the high-voltage isolating switch is converted into the measurement of the rotation angle of a worm wheel, the measurement of the rotation angle of the worm wheel is converted into the measurement of the rotation angle of a cam, and the measurement of the rotation angle of the cam is converted into the measurement of the linear moving distance of a detection rod, so that the measurement is convenient, and the observation is convenient; through observing the distance that the measuring lever removed, read the reading on the slide caliper promptly, can measure the calculation to cam rotation angle, need not electrical components such as sensor, can avoid electromagnetism to the influence of sensor precision, through the cam rotation angle that obtains of calculation, combine the drive ratio of worm gear, alright know high-voltage isolator switch rotation angle. The arrangement of the conductive head 41 on the rotating disk 4 and the coil 51 on the coil disk forms a slide rheostat circuit, the conductive head 41 slides relative to the coil 52, the current in the circuit and the voltage value of the fixed resistor flowing through the slide rheostat circuit are changed, the measurement calculation of the slide rheostat resistor is further realized, the position of the contact point of the conductive head and the coil 52 is further obtained, the rotation angle of the conductive head 41 is further indirectly obtained, the rotation angle of the rotating disk 4 and the main shaft 3 is further obtained, and the rotation angle of the high-voltage disconnecting switch is calculated by combining with the transmission ratio of a worm gear and a worm. The arrangement of the conductive head 41 and the coil 52 obtains the rotation angle of the main shaft by measuring the current and voltage signals, and then calculates to obtain the rotation angle of the disconnecting link of the high-voltage isolating switch; the cam 6 and the detection rod 74 are arranged, and the rotation angle of the main shaft is calculated by measuring the moving distance of the detection rod 74, so that the rotation angle of the disconnecting link of the high-voltage disconnecting switch is calculated. The two measurement modes are mutually verified, and if the difference of the rotation angles of the high-voltage disconnecting switch disconnecting switches obtained in the two measurement modes is large, the fact that one measurement mode has a fault is indicated, and the high-voltage disconnecting switch disconnecting switches need to be overhauled.
Claims (10)
1. The device for measuring the rotation angle of the high-voltage isolating switch is characterized by comprising a worm, a worm wheel and a main shaft, wherein the worm is coaxially arranged with a disconnecting link rotating shaft of the high-voltage isolating switch, the worm wheel is fixed on the main shaft and meshed with the worm, a support is arranged on the main shaft, and the support is used for supporting the main shaft; the end part of one end of the main shaft is provided with a D-shaped cam, the side wall of the cam is provided with a contact plane, a detection rod is arranged above the cam, the detection rod is vertically arranged and moves up and down along the vertical direction, a main ruler is vertically arranged above the cam, a vernier scale is vertically arranged above the detection rod, the vernier scale is connected with the main ruler in a sliding manner, the vernier scale and the main ruler form a vernier caliper, and the vernier scale keeps contact with the top of the detection rod under the self weight; when the bottom of the detection rod is in contact with the center line of the contact surface, the main scale zero scale line is superposed with the vernier scale zero scale line.
2. The device for measuring the rotation angle of the high-voltage disconnecting switch according to claim 1, wherein the lower end of the detection rod is conical, and the bottom of the detection rod is provided with a ball.
3. The device for measuring the rotation angle of the high-voltage isolating switch according to claim 1, wherein a guide sleeve is arranged above the cam, and the detection rod slides up and down along the guide sleeve.
4. The device for measuring the rotation angle of the high-voltage disconnecting switch according to claim 1, wherein one end of the spindle is provided with a rotating disc, the rotating disc and the spindle are axially connected in a sliding manner and are circumferentially fixed relatively, a spring is arranged between the rotating disc and an adjacent support, an end face of one end of the rotating disc is provided with a conductive head, a coil disc is arranged between the rotating disc and the cam, an end face of the coil disc facing the rotating disc is provided with a conductive coil, and the spring acts to enable the conductive head to be in contact with the end face of the coil disc; the coil and a fixed resistor are positioned in the same current loop, and when the conductive head slides along the coil, the resistance of the coil connected into the current loop changes; the current loop also has a current meter and a voltage meter.
5. The high-voltage disconnecting switch rotation angle measuring device according to claim 4, wherein the rotating disk end face further has two balance heads, and the conductive head and the two balance heads are uniformly arranged on the same circumference.
6. The high-voltage disconnecting switch rotation angle measuring device according to claim 4, wherein one end of the spring is fixedly connected with the support, and the other end of the spring is provided with a spring seat which is rotatably connected with the rotating disk.
7. The high-voltage isolating switch rotation angle measuring device of claim 4, wherein the outer wall of the spring seat is provided with a limiting ring, and the limiting ring is arranged to realize relative fixation between the spring seat and the rotating disc along the axial direction.
8. The device for measuring the rotation angle of the high-voltage disconnecting switch according to claim 5, wherein the balancing head is an insulator.
9. The device for measuring the rotation angle of the high-voltage disconnecting switch according to claim 1, wherein the top of the coil panel is provided with a fixing plate, the fixing plate comprises a horizontal part and a vertical part, the top of the main ruler is fixedly connected with the horizontal part of the fixing plate, and the vertical part of the fixing plate is fixedly connected with the top of the coil panel.
10. The measuring method of the rotating angle measuring device of the high-voltage disconnecting switch according to any one of claims 1 to 9, characterized by comprising the following steps:
(1) Driving a knife switch of the high-voltage isolating switch to be switched on or switched off, and driving a worm of the measuring device to synchronously rotate by the knife switch of the high-voltage isolating switch, so that a worm wheel rotates, and further a main shaft and a cam are driven to rotate;
(2) The cam rotates to drive the detection rod to move up and down, the rotation angles of the cam and the spindle are calculated by measuring the up-and-down movement distance of the detection rod, and finally the rotation angle of the high-voltage isolating switch is calculated by the transmission ratio between the worm wheel and the worm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210721843.5A CN115265340B (en) | 2022-06-24 | 2022-06-24 | High-voltage isolating switch rotation angle measuring device and measuring method |
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| CN202210721843.5A CN115265340B (en) | 2022-06-24 | 2022-06-24 | High-voltage isolating switch rotation angle measuring device and measuring method |
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| CN115265340B CN115265340B (en) | 2024-06-11 |
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