A special cutting tool for oil-resistant sealing rings of transformers

Abstract

The present invention discloses a special cutting tool for oil-resistant gaskets of transformers, which includes a framework. The framework includes a transverse framework and at least one longitudinal framework fixedly crossed with the transverse framework. A positioning pin A is provided at the crossing fixed point of the transverse framework and the longitudinal framework and / or the center point of the transverse framework. Measuring arms A are respectively hinged at both ends of the transverse framework. The measuring arm A can rotate relative to the transverse framework with the hinge point as the center of the circle. At least one set of measuring arms B are respectively provided at both ends of the longitudinal framework. The measuring arm B can reciprocate along the length direction of the longitudinal framework. Scales and tracks are provided on both the measuring arm A and the measuring arm B along their length directions. The track penetrates the measuring arm and at least one set of cutter assemblies are arranged in the track. The cutter assembly includes a cutter and a locking member. The locking member can fix the cutter on the track. Using this cutting tool can improve the cutting efficiency and accuracy of the oil-resistant gaskets of transformers.

Description

Technical Field

[0001] The present invention specifically relates to a special cutting tool for oil-resistant sealing rings of transformers. Background Art

[0002] As a sealing element, the oil-resistant sealing ring of a transformer plays a crucial role during the operation of the transformer. If the sealing ring ages and is not replaced in a timely manner, oil leakage will occur at the connection of the transformer. Therefore, maintenance personnel need to regularly inspect and replace the sealing ring of the transformer.

[0003] Currently, due to the diverse specifications and sizes of the flanges at the connections of transformers, there are often situations where there are no spare sealing rings or the sizes of the spare sealing rings are inappropriate. Therefore, maintenance personnel need to carry rubber sheets and cutting tools to perform on-site cutting. Since the existing cutting tools have imperfect functions, maintenance personnel need to first use a meter ruler to measure the inner diameter and outer diameter of the sealing ring of the connecting flange; then mark the scales on the rubber sheet and cut the outer diameter and inner diameter respectively. This method is time-consuming and laborious, and the accuracy of the cut sealing ring is insufficient with large errors. At the same time, most of the cutting instruments with high accuracy on the market are relatively bulky and require power supply for operation, which is not conducive to on-site emergency repair applications. Based on the above analysis, the present application provides a special cutting tool for oil-resistant sealing rings of transformers with a simple structure. Summary of the Invention

[0004] The present invention discloses a special cutting tool for oil-resistant sealing rings of transformers. Using this cutting tool can improve the cutting efficiency and accuracy of oil-resistant sealing rings of transformers.

[0005] The present invention discloses a special cutting tool for oil-resistant sealing rings of transformers, which includes a framework. The framework includes a horizontal framework and at least one vertical framework cross-fixed with the horizontal framework. A positioning pin A is provided at the cross-fixing point of the horizontal framework and the vertical framework and / or the center point of the horizontal framework. Measuring arms A are respectively hinged at both ends of the horizontal framework. The measuring arm A can rotate relative to the horizontal framework with the hinge point as the center of the circle. At least one group of measuring arms B are respectively provided at both ends of the vertical framework. The measuring arm B can reciprocate along the length direction of the vertical framework. Scales and tracks are provided on both the measuring arm A and the measuring arm B along their length directions. The track penetrates the measuring arm and at least one group of cutter assemblies are arranged in the track. The cutter assembly includes a cutter and a locking member. The locking member can fix the cutter on the track.

[0006] As a preferred solution of the present application, a chute or slide rail is provided on the vertical framework along its length direction. A slider is provided on the measuring arm B. The slider can be fitted with the chute or slide rail on the vertical framework and move on the chute or slide rail to drive the measuring arm B to reciprocate along the length direction of the vertical framework.

[0007] As a preferred embodiment of the present application, positioning pins B are provided at both ends of the measuring arm B, and the positioning pins B can be used to fix the periphery of the rubber sheet to be cut.

[0008] As a preferred embodiment of the present application, the cutter is provided with an external thread, and the locking member includes a limiting collar, a reset collar and an adjusting nut. The limiting collar is installed at the part of the cutter below the track, and the diameter of the limiting collar is greater than the width of the track. The reset collar and the adjusting nut are installed at the part of the cutter above the track. The reset collar is located between the adjusting nut and the limiting collar. The diameter of the reset collar is greater than the width of the track and the diameter of the cutter. The adjusting nut can be screwed with the external thread on the cutter. By rotating the adjusting nut, the reset collar can be compressed under the action of the limiting collar, thereby locking the cutter on the track.

[0009] As a preferred embodiment of the present application, the intersection of the transverse frame and the longitudinal frame is fixed by bolts or pins. By adjusting the tightness of the bolts or pins, the angle between the transverse frame and the longitudinal frame can be adjusted; and / or, two cutter assemblies are provided in the track of the measuring arm A.

[0010] As a preferred embodiment of the present application, the length of the transverse frame is greater than the length of the longitudinal frame.

[0011] Compared with the prior art, the advantages of the special cutting tool for the oil-resistant sealing ring of the transformer in the present invention are as follows:

[0012] (1) The structure is simple, easy to carry, and the manufacturing and use costs are low.

[0013] (2) The size of the old oil-resistant sealing ring can be determined first through the positioning pin A3 and the measuring arm, and then the cutting tool is moved to the rubber sheet to be cut. The center position is determined through the positioning pin A3, and then a new oil-resistant sealing ring is cut by the cutter 71 according to the inner and outer diameter sizes measured by the measuring arm. There is no need for a meter ruler and manual drawing. In this way, not only the cutting accuracy and efficiency of the oil-resistant sealing ring are improved, but also the labor intensity of the maintenance personnel is reduced.

[0014] (3) The cutter 71 can be fixed on the track 6 through the locking member, that is, the cutter assembly 7 has both a positioning function and a cutting function. The accurate positioning and rapid cutting of the sealing ring can be realized by using the cutter assembly 7.

[0015] (4) One person can complete the cutting of the oil-resistant sealing ring, that is, the labor cost of personnel can be saved by using this tool. Description of the Drawings

[0016] Figure 1The front view structural schematic diagram of the special cutting tool for the oil-resistant transformer seal ring of the elliptical seal ring that can be cut provided in the first embodiment of the present invention.

[0017] Figure 2 The front view structural schematic diagram of the special cutting tool for the oil-resistant transformer seal ring of the quadrilateral seal ring that can be cut provided in the first embodiment of the present invention.

[0018] Figure 3 The side view structural schematic diagram of the special cutting tool for the oil-resistant transformer seal ring provided in the first embodiment of the present invention.

[0019] Figure 4 Provided in the first embodiment of the present invention Figure 3 The partial enlarged view at A in

[0020] Figure 5 The front view structural schematic diagram of the special cutting tool for the oil-resistant transformer seal ring in which two groups of measuring arms B are respectively provided at both ends of the longitudinal skeleton provided in the first embodiment of the present invention.

[0021] Figure 6 The structural schematic diagram of the cutter assembly provided in the first embodiment of the present invention.

[0022] Figure 7 The front view structural schematic diagram of the cutting assembly installed on the track provided in the first embodiment of the present invention.

[0023] Figure 8 The front view structural schematic diagram of the cutter fixed on the track by the locking member provided in the first embodiment of the present invention.

[0024] Figure 9 The front view structural schematic diagram of the special cutting tool for the oil-resistant transformer seal ring provided in the second embodiment of the present invention.

[0025] Figure 10 The side view structural schematic diagram of the special cutting tool for the oil-resistant transformer seal ring provided in the second embodiment of the present invention.

[0026] As shown in the figure:

[0027] Transverse skeleton 1, longitudinal skeleton 2, chute 21, positioning pin A3, measuring arm A4, measuring arm B5, slider 51, positioning pin B52, track 6, cutter assembly 7, cutter 71, limit collar 72, return collar 73, adjusting nut 74. Detailed implementation manners

[0028] The preferred implementation manners of the present invention will be described in detail below.

[0029] Embodiment 1:

[0030] This embodiment provides a special cutting tool for the oil-resistant sealing ring of a transformer. The tool includes a framework, and the framework includes a transverse framework 1 and a longitudinal framework 2 fixedly crossed with the transverse framework 1. In this embodiment, preferably, the intersection point of the transverse framework 1 and the longitudinal framework 2 is fixed by bolts or pins. By adjusting the tightness of the bolts or pins, the angle between the transverse framework 1 and the longitudinal framework 2 can be adjusted. A positioning pin A3 is provided at the intersection fixing point of the transverse framework 1 and the longitudinal framework 2 and / or at the center point of the transverse framework 1. When the positioning pin A3 is provided at the intersection fixing point, the positioning pin A3 can be a screw or a pin for fixing the transverse framework 1 and the longitudinal framework 2. See Figures 1-3 ; Measuring arms A4 are respectively hinged at both ends of the transverse framework 1. The measuring arm A4 can rotate relative to the transverse framework 1 with the hinge point as the center of the circle. See Figures 1-2 , and the movement trajectories of the measuring arm A4 are respectively shown in these two figures. Measuring arms B5 are respectively provided at both ends of the longitudinal framework 2. In this embodiment, according to needs, two groups of measuring arms B5 can be respectively provided at both ends of the longitudinal framework 2. Both groups of measuring arms B5 can reciprocate along the length direction of the longitudinal framework 2. The inner diameter and outer diameter of the upper and lower ends of the oil-resistant sealing ring can be respectively measured and cut by using these two groups of measuring arms B5. See Figure 5 ; In this embodiment, preferably, a chute 21 or a slide rail is provided on the longitudinal framework 2 along its length direction. A slider 51 is provided on the measuring arm B5. The slider 51 can be engaged with the chute 21 or the slide rail on the longitudinal framework 2 and move on the chute 21 or the slide rail, thereby driving the measuring arm B5 to reciprocate along the length direction of the longitudinal framework 2. In this embodiment, preferably, a chute 21 is provided on the longitudinal framework 2 along its length direction. Protrusions corresponding to the chute 21 are provided at both ends of the slider 51. The protrusions are embedded in the chute 21 and can move in the chute 21. See Figure 4 ; Scales and tracks 6 are provided on both the measuring arm A4 and the measuring arm B5 along their length directions. The track 6 penetrates the measuring arm, and at least one set of cutter assemblies 7 is arranged in the track 6. In this embodiment, in order to measure and cut the inner diameter and outer diameter of the left and right ends of the sealing ring simultaneously, preferably, two sets of cutter assemblies 7 are arranged in the track 6 of the measuring arm A4. In this embodiment, one set of cutter assemblies 7 can be arranged in the track 6 of the measuring arm B5. Of course, in order to more stably fix the rubber sheet to be cut (the material for making the oil-resistant sealing ring) and for convenient and fast cutting, preferably, two or three sets of cutter assemblies 7 can be arranged in the track 6 of the measuring arm B5. The two sets of cutter assemblies 7 are respectively distributed in the tracks 6 of the measuring arms B5 located on both sides of the longitudinal framework 2; The cutter assembly 7 includes a cutter 71 and a locking member, and the locking member can fix the cutter 71 on the track 6. See Figure 6, in this embodiment, preferably, the length of the cutter 71 below the track 6 is less than the length of the positioning pin A3 after the cutter 71 is locked by the locking member, so that it is convenient to first use the positioning pin A3 to determine and fix the center; in this embodiment, the upper end portion of the cutter 71 is provided with an external thread, and the locking member includes a limiting collar 72, a return collar 73 and an adjusting nut 74. The limiting collar 72 is installed at the part of the cutter 71 below the track 6, and the diameter of the limiting collar 72 is greater than the width of the track 6, that is, the cutter 71 below the limiting collar 72 cannot enter the track 6. The return collar 73 and the adjusting nut 74 are installed at the part of the cutter 71 above the track 6. The return collar 73 is located between the adjusting nut 74 and the limiting collar 72. The diameter of the return collar 73 is greater than the width of the track 6 and the diameter of the cutter 71, that is, the return collar 73 can move on the cutter 71. The adjusting nut 74 can be screwed with the external thread on the cutter 71. Rotating the adjusting nut 74 can compress the return collar 73 under the action of the limiting collar 72, thereby locking the cutter 71 on the track 6. See Figures 7-8 ; when this embodiment is used for positioning, since the size of the limiting collar 72 is greater than the width of the track 6, the cutter 71 below the limiting collar 72 will be fixed or restricted below the track 6, so that it cannot expand and contract in the track 6. The adjusting nut 74 and the return collar 73 can reciprocate on the cutter 71 above the track 6. Rotating the adjusting nut 74 can compress or decompress the return collar 73 when the cutter 71 moves up and down. When the adjusting nut 74 moves downward, the return collar 73 will be compressed under the action of the limiting collar 72, thereby locking the cutter 71 on the track 6 to prevent it from shifting; when cutting, rotate the adjusting nut 74 in the reverse direction to move it upward along the external thread on the cutter 71 to the highest point. At this time, the return collar 73 resets and the cutter 71 is in a movable state. Then hold and slide the cutter 71 to perform the sealing ring cutting operation, so as to ensure higher dimensional accuracy of the cut oil-resistant sealing ring.

[0031] Furthermore, in this embodiment, in order to better realize the positioning and fixing functions, preferably, positioning pins B52 are provided at both ends of the measuring arm B5. The positioning pins B52 can be used to fix the periphery of the rubber sheet to be cut, so as to avoid the problem that the size of the cut oil-resistant sealing ring is inaccurate due to the displacement of the rubber sheet to be cut during the cutting process.

[0032] Furthermore, in this embodiment, the length of the transverse skeleton 1 is greater than the length of the longitudinal skeleton 2. In this way, the cutting tool in this embodiment can cut out a quadrilateral or elliptical transformer oil-resistant sealing ring.

[0033] When this embodiment is in use, first, the positioning pin A3 on the cutting tool is used to determine the center position of the old sealing ring. Then, the measuring arm A4 and the measuring arm B5 are used to measure the inner and outer diameters of the old sealing ring. The positions of the inner and outer diameters on the old sealing ring are located by the cutter assembly 7, and the cutter 71 is fixed on the track 6 by the locking member to prevent the cutter assembly 7 from shifting when the cutting tool moves. Then, the cutting tool is moved to the rubber to be cut, the center position is determined on the rubber to be cut, and the positioning pin A3 is fixed at the center position. Then, the surrounding of the rubber to be cut is fixed by the positioning pin B52. Finally, the locking member is loosened, and the cutter 71 is held and moved to perform cutting without replacing the cutter 71.

[0034] As can be seen from the above, the special cutting tool for the oil-resistant sealing ring of the transformer in this embodiment not only has a simple structure, is convenient to carry, and has low manufacturing and use costs, but also does not require a meter stick and manual drawing. Only by using the positioning pin A3 and the measuring arm on the cutting tool can the size and position of the required oil-resistant sealing ring be determined. At the same time, the cutter 71 can be fixed on the track 6 by the locking member, that is, the cutter assembly 7 has both a positioning function and a cutting function. Using this cutter assembly 7, the accurate positioning and cutting of the sealing ring can be realized. Therefore, using the cutting tool for the oil-resistant sealing ring of the transformer in this embodiment not only improves the cutting accuracy and efficiency of the oil-resistant sealing ring, but also reduces the labor intensity of maintenance personnel and saves labor costs.

[0035] Embodiment 2:

[0036] Compared with Embodiment 1, the difference in this embodiment is that two groups of parallel longitudinal skeletons 2 are provided on the transverse skeleton 1, and the two groups of parallel longitudinal skeletons 2 and the transverse skeleton 1 are fixed at the intersection by pins or screws. See Figures 9-10 , and this structure of the cutting tool can make the movement of the measuring arm B5 more stable and synchronous.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, several changes and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A special cutting tool for the oil-resistant sealing ring of a transformer, characterized in that, It includes a framework which comprises a transverse framework (1) and at least one longitudinal framework (2) fixedly crossed with the transverse framework (1). A positioning pin A (3) is provided at the crossing fixing point of the transverse framework (1) and the longitudinal framework (2) and / or at the center point of the transverse framework (1). When the positioning pin A (3) is provided at the crossing fixing point, the positioning pin A (3) can be a screw or a pin for fixing the transverse framework (1) and the longitudinal framework (2). At both ends of the transverse framework (1), measuring arms A (4) are respectively hinged. The measuring arms A (4) can rotate relative to the transverse framework (1) with the hinge point as the center of a circle. At both ends of the longitudinal framework (2), at least one set of measuring arms B (5) are respectively provided. The measuring arms B (5) can reciprocate along the length direction of the longitudinal framework (2). Both the measuring arms A (4) and the measuring arms B (5) are provided with scales and tracks (6) along their length directions. The tracks (6) penetrate through the measuring arms A (4) and the measuring arms B (5) respectively, and at least one set of cutter assemblies (7) are arranged in the tracks (6). The cutter assemblies (7) comprise cutters (71) and locking parts, and the locking parts can fix the cutters (71) on the tracks (6).

2. The special cutting tool for the oil-resistant sealing ring of a transformer according to claim 1, characterized in that, A chute (21) or a slide rail along the length direction of the longitudinal framework (2) is provided on the longitudinal framework (2). A slider (51) is provided on the measuring arm B (5). The slider (51) can be engaged with the chute (21) or the slide rail on the longitudinal framework (2) and move on the chute (21) or the slide rail, thereby driving the measuring arm B (5) to reciprocate along the length direction of the longitudinal framework (2).

3. The special cutting tool for the oil-resistant sealing ring of a transformer according to claim 2, characterized in that, Positioning pins B (52) are provided at both ends of the measuring arm B (5), and the periphery of the rubber sheet to be cut can be fixed by using the positioning pins B (52).

4. The special cutting tool for the oil-resistant sealing ring of a transformer according to any one of claims 1-3, characterized in that, External threads are provided on the cutters (71). The locking parts comprise a limiting collar (72), a reset collar (73) and an adjusting nut (74). The limiting collar (72) is installed at the part of the cutter (71) below the track (6), and the diameter of the limiting collar (72) is larger than the width of the track (6). The reset collar (73) and the adjusting nut (74) are installed at the part of the cutter (71) above the track (6). The reset collar (73) is located between the adjusting nut (74) and the limiting collar (72). The diameter of the reset collar (73) is larger than the width of the track (6) and the diameter of the cutter (71). The adjusting nut (74) can be screwed with the external threads on the cutter (71). By rotating the adjusting nut (74), the reset collar (73) can be compressed under the action of the limiting collar (72), thereby locking the cutter (71) on the track (6).

5. The special cutting tool for the oil-resistant sealing ring of a transformer according to any one of claims 1-3, characterized in that, The crossing point of the transverse framework (1) and the longitudinal framework (2) is fixed by bolts or pins. By adjusting the tightness of the bolts or pins, the angle between the transverse framework (1) and the longitudinal framework (2) can be adjusted; and / or, two sets of cutter assemblies (7) are arranged in the track (6) of the measuring arm A (4).

6. The special cutting tool for the oil-resistant sealing ring of a transformer according to claim 4, wherein The intersection points of the transverse skeleton (1) and the longitudinal skeleton (2) are fixed by bolts or pins, and the angle between the transverse skeleton (1) and the longitudinal skeleton (2) can be adjusted by adjusting the tightness of the bolts or pins; and / or, two groups of cutter assemblies (7) are provided in the track (6) of the measuring arm A (4).

7. The special cutting tool for the oil-resistant sealing ring of a transformer according to any one of claims 1-3, characterized in that, The length of the transverse skeleton (1) is greater than the length of the longitudinal skeleton (2).

8. The special cutting tool for the oil-resistant sealing ring of a transformer according to claim 4, characterized in that The length of the transverse skeleton (1) is greater than the length of the longitudinal skeleton (2).

9. The special cutting tool for the oil-resistant sealing ring of a transformer according to claim 5, characterized in that, The length of the transverse skeleton (1) is greater than the length of the longitudinal skeleton (2).

10. The special cutting tool for the oil-resistant sealing ring of a transformer according to claim 6, wherein, The length of the transverse skeleton (1) is greater than the length of the longitudinal skeleton (2).

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