Ultra-high frequency partial discharge intelligent sensor locking and fixing mechanism and fastening method

Abstract

The invention discloses a locking and fixing mechanism and a fastening method for a UHF partial discharge intelligent sensor, the mechanism comprising a double-hole elliptical aluminum sleeve, a steel wire rope, a stainless steel slider, a stroke adjustment bolt and a sensor outer shell. The stainless steel slider is arranged in a slider stroke hole of the sensor outer shell with adjustable stroke, and one end of the steel wire rope is connected to the stainless steel slider after passing through the rope threading hole of the outer shell; the stroke adjustment bolt is screwed to the internal thread section of the slider stroke hole, which is used to adjust and position the stainless steel slider and compress the steel wire rope. The fastening method comprises preparing the sensor, pre-adjusting the slider, threading the rope and tightening it, setting the pull ring, pre-positioning the sensor and tightening the sensor, and tightening the steel wire rope and accurately positioning the sensor by screwing the stroke adjustment bolt. The mechanism has a simple structure, is easy to operate, has good stability, high reliability, is relatively convenient to fix and remove, and can effectively reduce the labor intensity of the staff and improve work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of partial discharge detection of electric power equipment, and in particular to a locking and fixing mechanism and a fastening method for a UHF partial discharge intelligent sensor. Background Art

[0002] Partial discharge is the main factor causing insulation failure of gas-insulated metal-enclosed switchgear. The intensity of its activity can be used as a reference for the degree of insulation degradation. Therefore, in recent years, ultra-high frequency partial discharge intelligent sensors have been widely used in the detection and monitoring of partial discharge of gas-insulated metal-enclosed switchgear, and are an important part of substation status monitoring. There are three commonly used fixing methods for existing ultra-high frequency partial discharge sensors: the first is fixed to the gas-insulated metal-enclosed switchgear by a belt-encircled method; the second is fixed to the gas-insulated metal-enclosed switchgear by glue; the third is a handheld ultra-high frequency partial discharge sensor, which is placed on the electrical basin insulator of the gas-insulated metal-enclosed switchgear for detection; the above three methods all have different problems: the belt-encircled method cannot maintain the monitoring work of the sensor for a long time due to the easy aging of the belt, and it is easy to have a signal leakage caused by poor airtightness; the glue method will destroy the surface appearance of the original power equipment and the appearance of the sensor itself, and the firmness performance is poor; the handheld detection is extremely inconvenient, and the unstable handholding of the detection personnel during the detection will bring interference signals, affecting the detection results, and it is only suitable for short-term monitoring work. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a locking and fixing mechanism and a fastening method for a UHF partial discharge intelligent sensor, which can solve the above-mentioned related problems.

[0004] Design principle: In order to achieve the performance of airtightness between the UHF partial discharge intelligent sensor and the power equipment, reliable and firm installation, and anti-aging; the present invention, through discussion and theoretical analysis and calculation, adopts the form of a wire rope locking mechanism to effectively solve the problem of fixing the UHF partial discharge sensor by elastic band or glue; the wire rope is passed through the slider and the through hole of the UHF sensor to connect them together, the end of the wire rope is fixed with a double-hole elliptical aluminum sleeve, and is sleeved on the nut of the power equipment for preliminary fixation, and then the slider and the wire rope are driven by the bolt locking on the UHF sensor to achieve the locking of the UHF partial discharge intelligent sensor.

[0005] Technical solution: The purpose of the present invention is achieved by adopting the following technical solution.

[0006] A locking and fixing mechanism for a UHF partial discharge intelligent sensor, the locking and fixing mechanism comprising a double-hole elliptical aluminum sleeve, a steel wire rope, a stainless steel slider, a stroke adjustment bolt and a sensor outer shell. Slider stroke holes are provided on two opposite side walls of the sensor outer shell, and an internal thread section corresponding to the stroke adjustment bolt is provided on the upper inner wall of the slider stroke hole; an outer shell rope threading hole is provided on the outer hole wall of the slider stroke hole; the double-hole elliptical aluminum sleeve is sleeved and fixed to one end of the steel wire rope to form a connecting ring, which is used to be connected and fixed with a to-be-detected part by bolts; the stainless steel slider is adjustable in stroke and arranged in the slider stroke hole of the sensor outer shell, and the other end of the steel wire rope is connected to the stainless steel slider after passing through the outer shell rope threading hole; the stroke adjustment bolt is screwed to the internal thread section of the slider stroke hole, which is used to adjust and position the stainless steel slider and compress the steel wire rope.

[0007] Preferably, the stainless steel slider is a columnar slider body, a slider rope threading hole is provided perpendicular to the axis of the columnar slider body, and a cross groove is provided on the bottom surface of the stainless steel slider.

[0008] Preferably, two wire rope avoidance grooves are axially provided on the outer peripheral wall of the stainless steel slider from the top surface of the slider downwardly covering both ends of the rope threading hole of the slider.

[0009] Preferably, a plurality of two slider travel holes are provided on two opposite side walls of the sensor outer shell.

[0010] The present invention also provides a method for fastening a high-frequency partial discharge intelligent sensor, and the method comprises the following steps.

[0011] Prepare the sensor, screw the stroke adjustment bolt into the slider stroke hole of the sensor outer shell, and adjust the bottom of the stroke adjustment bolt to close to the top of the rope threading hole of the outer shell.

[0012] Pre-adjust the slider, turn over the sensor outer shell with the bottom facing up, insert the stainless steel slider into the slider stroke hole from the top surface of the slider, adjust the stroke adjustment bolt and the cross slot on the bottom surface of the stainless steel slider until the slider rope threading hole of the stainless steel slider is opposite to the rope threading hole of the outer shell.

[0013] The wire rope is passed through the wire threading hole of the outer shell and then inserted into the wire threading hole of the slider, and the stroke adjustment bolt is screwed until the wire rope is fastened on the outer shell of the sensor.

[0014] Set the pull ring, determine the length of the wire rope according to the installation position of the sensor on the object to be detected and the distance between the fixed points, and use the double-hole elliptical aluminum sleeve to coil and tighten the end of the wire rope to form a connecting ring.

[0015] The sensor is pre-positioned, the base of the sensor outer shell is installed on the installation position of the part to be detected, the wire rope is pre-tightened and the connecting ring is fixed to the fixing point of the part to be detected by bolts.

[0016] The sensor is tightened by turning the stroke adjustment bolt to tighten the wire rope and accurately position the sensor.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the fixing device has a simple structure, is easy to operate, has good stability, high reliability, is relatively convenient to fix and remove, and can effectively reduce the labor intensity of the staff and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional schematic diagram of the locking and fixing mechanism of the ultra-high frequency partial discharge intelligent sensor of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a stainless steel slider;

[0020] Figure 3 This is a schematic diagram of the connection between the UHF partial discharge intelligent sensor and the gas-insulated metal-enclosed switchgear;

[0021] Figure 4 for Figure 3 Cross-sectional view at AA in the middle.

[0022] In the figure:

[0023] 1. Double-hole oval aluminum sleeve;

[0024] 2. Steel wire rope; 21. Connecting ring;

[0025] 3. Stainless steel slider; 31. Columnar slider body; 32. Slider rope threading hole; 33. Cross groove; 34. Wire rope avoidance groove;

[0026] 4. Stroke adjustment bolt;

[0027] 5. Sensor outer shell; 51. Slider travel hole; 52. Rope threading hole of outer shell; 53. Internal thread section;

[0028] 81. Gas-insulated metal-enclosed switchgear; 82. Positioning bolts; 83. Basin-type insulators. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0030] See also Figure 1 A locking and fixing mechanism for a UHF partial discharge intelligent sensor, the locking and fixing mechanism comprising a double-hole elliptical aluminum sleeve 1, a steel wire rope 2, a stainless steel slider 3, a stroke adjustment bolt 4 and a sensor outer shell 5.

[0031] Connection relationship: a slider travel hole 51 is provided on two opposite side walls of the sensor outer shell 5, an internal thread section 53 corresponding to the travel adjustment bolt 4 is provided on the upper inner wall of the slider travel hole 51; and an outer shell rope threading hole 52 is provided on the outer hole wall of the slider travel hole 51.

[0032] The double-hole elliptical aluminum sleeve 1 is sleeved and fixed to one end of the steel wire rope 2 to form a connecting ring 21, which is used to be connected and fixed to the to-be-detected part by bolts. The diameter of the connecting ring 21 is freely set according to the bolts used with the connecting part.

[0033] The stainless steel slider 3 is arranged in a slider travel hole 51 of the sensor outer shell 5 with an adjustable stroke, and the other end of the steel wire rope 2 passes through the rope threading hole 52 of the outer shell and is connected to the stainless steel slider 3 .

[0034] The stroke adjustment bolt 4 is screwed to the internal thread section 53 of the slider stroke hole 51 , and is used to adjust and position the stainless steel slider 3 and compress the steel wire rope 2 .

[0035] Furthermore, the cross-sectional diameter of the steel wire rope 2 is smaller than the inner diameter of the rope threading hole 52 of the outer shell, and the inner diameter of the rope threading hole 52 of the outer shell is smaller than the inner diameter of the slider travel hole 51; the maximum outer diameter of the stainless steel slider 3 is smaller than the inner diameter of the slider travel hole 51; and the gap between the stainless steel slider 3 and the slider travel hole 51 is smaller than the cross-sectional diameter of the steel wire rope 2.

[0036] In one embodiment, the gap between the stainless steel slider 3 and the slider travel hole 51 is 0.5 mm, and the travel adjustment bolt 4 is an M6 bolt.

[0037] See also Figure 2 (2a, 2b and 2c), the stainless steel slider 3 is a columnar slider body 31, a slider rope threading hole 32 is opened perpendicular to the axis of the columnar slider body 31, and a cross groove 33 is opened on the bottom surface of the stainless steel slider 3.

[0038] Furthermore, two wire rope avoidance grooves 34 are axially provided on the outer peripheral wall of the stainless steel slider 3 from the top surface of the slider downwardly covering the two ends of the slider rope threading hole 32 .

[0039] In a preferred embodiment, the slide block rope threading hole 32 is provided in the middle of the outer circumferential surface of the stainless steel slide block 3 .

[0040] Furthermore, the groove width of the wire rope avoidance groove 34 is greater than the diameter of the wire rope 2 , and the groove depth of the wire rope avoidance groove 34 is greater than the radius of the wire rope 2 and smaller than the diameter of the wire rope 2 .

[0041] Among them, the number of slider travel holes 51 can be set in multiples according to the actual needs of the part to be detected, at least two. In a preferred embodiment, two slider travel holes 51 are opened on the two opposite side walls of the sensor outer shell 5, that is, a total of four are set.

[0042] See also Figure 3 and Figure 4 A method for fixing the high-frequency partial discharge intelligent sensor using the above-mentioned locking and fixing mechanism includes the following steps.

[0043] Prepare the sensor, screw the stroke adjustment bolt 4 into the slider stroke hole 51 of the sensor outer shell 5, and adjust the bottom of the stroke adjustment bolt 4 to be close to the top of the rope threading hole 52 of the outer shell.

[0044] Pre-adjust the slider, turn over the sensor outer shell 5 with the bottom facing up, insert the stainless steel slider 3 into the slider stroke hole 51 from the top surface of the slider, and abut the bottom surface of the stroke adjustment bolt 4 against the top surface of the slider of the stainless steel slider 3. Adjust the stroke adjustment bolt 4 and the cross groove 33 on the bottom surface of the stainless steel slider 3 until the slider rope threading hole 32 of the stainless steel slider 3 is opposite to the rope threading hole 52 of the outer shell.

[0045] The wire rope 2 is passed through the wire rope threading hole 52 of the outer shell and then inserted into the wire rope threading hole 32 of the slider, and the stroke adjustment bolt 4 is screwed until the wire rope 2 is fastened on the outer shell 5 of the sensor.

[0046] A pull ring is provided, and the length of the steel wire rope is determined according to the installation position of the sensor on the object to be detected and the distance between the fixed points. The end section of the steel wire rope 2 is coiled and pressed through the double-hole elliptical aluminum sleeve 1 to form a connecting ring 21.

[0047] The sensor is pre-positioned, the base of the sensor outer shell 5 is installed on the installation position of the to-be-detected part, the steel wire rope 2 is pre-tightened and the connecting ring 21 is fixed to the fixing point of the to-be-detected part by bolts.

[0048] The sensor is fixed by tightening the stroke adjustment bolt 4, tightening the wire rope 2 and accurately positioning the sensor.

[0049] In one embodiment, a UHF partial discharge intelligent sensor is used to connect with a gas-insulated metal-enclosed switchgear 81. According to the above-mentioned fastening method, the bottom surface of the sensor outer shell 5 is placed on the pot-type insulator 83, and the connecting ring 21 at the end of the wire rope 2 is sleeved on the positioning bolt 82 at the installation position of the gas-insulated metal-enclosed switchgear 81. The thread of the M6 ​​stroke adjustment bolt 4 is used to guide the upper and lower directions, and the stainless steel slider 3 is pushed downward to tighten the wire rope 2 to achieve the locking function. The gap between the slider stroke hole 51 and the stainless steel slider 3 is 0.5 mm, so that the stainless steel slider 3 will not swing left and right or be misplaced in the slider stroke hole 51. When the stainless steel slider 3 and the wire rope 2 are pushed downward to lock, the wire rope 2 will enter the slider stroke hole 51. Since the gap between the stainless steel slider 3 and the slider stroke hole 51 is relatively small, the wire rope 2 interferes with the slider stroke hole 51, and the locking phenomenon will occur. Therefore, a wire rope avoidance groove 34 is opened on both sides of the stainless steel slider 3.

[0050] Features of the locking mechanism: Rigid locking makes the UHF partial discharge intelligent sensor and the gas-insulated metal-enclosed switchgear fully sealed to avoid interference; all fixed parts are metal parts, and the reliability of fixation is improved; fixing and removal are relatively convenient, which effectively reduces the labor intensity of the staff and improves work efficiency.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A locking and fixing mechanism for a UHF partial discharge intelligent sensor, the locking and fixing mechanism comprising a double-hole elliptical aluminum sleeve (1), a steel wire rope (2), a stainless steel slider (3), a stroke adjustment bolt (4) and a sensor outer shell (5), characterized in that: A slider travel hole (51) is provided on two opposite side walls of the sensor outer shell (5); an internal thread section corresponding to the travel adjustment bolt (4) is provided on the upper inner wall of the slider travel hole (51); and an outer shell rope threading hole (52) is provided on the outer hole wall of the slider travel hole (51); The double-hole elliptical aluminum sleeve (1) is sleeved and fixed to the end section of one end of the steel wire rope (2) to form a connecting ring (21) for being connected and fixed to the to-be-tested object by means of bolts; The stainless steel slider (3) is arranged in a slider travel hole (51) of the sensor outer shell (5) with adjustable stroke, and the other end of the steel wire rope (2) passes through the rope threading hole (52) of the outer shell and is connected to the stainless steel slider (3); The stroke adjustment bolt (4) is threadedly connected to the internal thread section of the slider stroke hole (51) and is used to adjust and position the stainless steel slider (3) and to compress the steel wire rope (2).

2. The locking and fixing mechanism according to claim 1, characterized in that: The cross-sectional diameter of the steel wire rope (2) is smaller than the inner diameter of the rope threading hole (52) of the outer shell, and the inner diameter of the rope threading hole (52) of the outer shell is smaller than the inner diameter of the slider travel hole (51); the maximum outer diameter of the stainless steel slider (3) is smaller than the inner diameter of the slider travel hole (51); and the gap between the stainless steel slider (3) and the slider travel hole (51) is smaller than the cross-sectional diameter of the steel wire rope (2).

3. The locking and fixing mechanism according to claim 1, characterized in that: The stainless steel slider (3) is a columnar slider body (31), a slider rope threading hole (32) is provided perpendicular to the axis of the columnar slider body (31), and a cross groove (33) is provided on the bottom surface of the stainless steel slider (3).

4. The locking and fixing mechanism according to claim 3, characterized in that: Two wire rope avoidance grooves (34) are axially provided on the outer peripheral wall of the stainless steel slider (3) from the top surface of the slider downwardly covering both ends of the slider rope threading hole (32).

5. The locking and fixing mechanism according to claim 3 or 4, characterized in that: The slide block rope threading hole (32) is arranged in the middle of the outer peripheral surface of the stainless steel slide block (3).

6. The locking and fixing mechanism according to claim 4, characterized in that: The groove width of the wire rope avoidance groove (34) is greater than the diameter of the wire rope (2), and the groove depth of the wire rope avoidance groove (34) is greater than the radius of the wire rope (2) and less than the diameter of the wire rope (2).

7. The locking and fixing mechanism according to claim 4, characterized in that: Two slide block travel holes (51) are provided on two opposite side walls of the sensor outer shell (5).

8. A fastening method for a high-frequency partial discharge intelligent sensor, applied to the locking and fixing mechanism as claimed in any one of claims 1 to 7, characterized in that: Methods include: Prepare the sensor, screw the stroke adjustment bolt (4) into the slider stroke hole (51) of the sensor outer shell (5), and adjust the bottom of the stroke adjustment bolt (4) to be close to the top of the outer shell rope threading hole (52); Pre-adjust the slider, turn the sensor outer shell (5) over with the bottom facing upward, insert the stainless steel slider (3) into the slider stroke hole (51) from the top of the slider, and adjust the stroke adjustment bolt (4) and the cross groove (33) on the bottom of the stainless steel slider (3) until the slider rope threading hole (32) of the stainless steel slider (3) is aligned with the outer shell rope threading hole (52); Rope threading and fastening: the steel wire rope (2) is passed through the rope threading hole (52) of the outer shell and then inserted into the rope threading hole (32) of the slider, and the stroke adjustment bolt (4) is screwed until the steel wire rope (2) is fastened to the outer shell (5) of the sensor; A pull ring is provided, and the length of the steel wire rope is determined according to the installation position of the sensor on the object to be detected and the distance between the fixed points. The end of the steel wire rope (2) is coiled and pressed through a double-hole elliptical aluminum sleeve (1) to form a connecting ring (21); Pre-positioning the sensor, installing the base of the sensor outer shell (5) on the installation position of the object to be detected, pre-tightening the steel wire rope (2) and fixing the connecting ring (21) to the fixing point of the object to be detected by bolts; The sensor is tightened by tightening the stroke adjustment bolt (4), tightening the wire rope (2) and accurately positioning the sensor.

9. The method according to claim 8, characterized in that: The high-frequency partial discharge intelligent sensor is fastened using the locking and fixing mechanism described in any one of claims 3 to 7.

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