An explosion-proof composite insulating rubber-impregnated paper casing and installation equipment

Abstract

The present invention belongs to the field of transformer bushings, and specifically relates to an explosion-proof composite insulating rubber-impregnated paper bushing and installation equipment, comprising: an outer insulating sleeve, a conduit, a rubber-impregnated paper insulation portion, a lead connector and a terminal head, wherein the middle section and upper section of the conduit are placed inside the outer insulating sleeve and are coaxial, the rubber-impregnated paper insulation portion is arranged in the middle section and lower section of the conduit, the upper end of the conduit is fixedly connected to the outer insulating sleeve via a flange, the rubber-impregnated paper insulation portion of the middle section of the conduit is fixedly connected to the lower end of the outer insulating sleeve via a flange, the terminal head is fixed to the end of the conduit by passing a lead through the conduit, and the terminal head is fixedly connected to the lead connector. The conduit of the rubber-impregnated paper bushing in this application is provided with a sealing sleeve to achieve more comprehensive sealing to prevent leakage of inert gas, and at the same time, the installation equipment can more conveniently install and replace the bushing, saving manpower.

Description

Technical Field

[0001] The present invention relates to the field of transformer bushings, and in particular to an explosion-proof composite insulating rubber-impregnated paper bushing and installation equipment. Background Art

[0002] Epoxy resin impregnated paper bushing, whose core main insulation is made of resin impregnated insulating paper, is a bushing composed of a core wound with untreated paper and then impregnated with a curable resin, commonly known as glue-impregnated paper bushing. The processed glue-impregnated paper core can be assembled, and metal parts, outer insulation sleeves, flanges, equalizing balls, etc. can be installed to form a finished bushing. For the bushing on the DC side of the converter transformer, the outer insulation can no longer be assembled. When installing or replacing the existing glue-impregnated paper bushing, workers are required to use a crane to lift the bushing vertically and align it with the installation position, and then pull the lead of the transformer winding through the bottom of the bushing to the top of the bushing for fixing. The worker pulls the lead with a rope and pulls up the lead synchronously with the speed of the crane lowering the bushing. This method is time-consuming and labor-intensive, and does not allow the crane to achieve maximum working efficiency.

[0003] Therefore, in order to solve the above problems, an explosion-proof composite insulating glue-impregnated paper bushing and installation equipment are proposed. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned problems and specifically designs an explosion-proof composite insulating glue-impregnated paper bushing and installation equipment, so that it can achieve better sealing effect. At the same time, the installation equipment can be used to install the bushing more conveniently, saving manpower and freeing up the crane, which can assist in the installation of other components.

[0005] To achieve the above-mentioned objectives, the present invention provides an explosion-proof composite insulating rubber-impregnated paper sleeve, comprising: an outer insulating sleeve, a conduit, a rubber-impregnated paper insulation part, a lead joint and a terminal head, the middle section and the upper section of the conduit are placed inside the outer insulating sleeve and are coaxial, the rubber-impregnated paper insulation part is arranged in the middle section and the lower section of the conduit, the upper end of the conduit is fixedly connected to the outer insulating sleeve through a flange, the rubber-impregnated paper insulation part of the middle section of the conduit is fixedly connected to the lower end of the outer insulating sleeve through a flange, the terminal head is fixed to the end of the conduit by passing a lead wire through the conduit, and the terminal head is fixedly connected to the lead joint.

[0006] Furthermore, it also includes a sealing sleeve, which is arranged on the end of the catheter and located between the catheter and the end flange, and is provided with a plurality of annular sealing protrusions.

[0007] In the above manner, an integral sealing sleeve is provided at the connection between the end of the conduit and the flange. The sealing sleeve includes a plurality of sealing rings. The sealing rings and the flange cooperate to achieve sealing to prevent leakage of the inert gas filled in the sleeve.

[0008] The present invention also proposes an installation device for an explosion-proof composite insulating rubber-impregnated paper bushing, comprising: a chassis, a lifting device, a supporting device, a traction device and a wire pulling device, wherein the supporting device is a V-shaped folded plate structure, the lifting device is installed on the chassis, the lifting end of the lifting device is hinged to the bottom surface of the supporting device, the bushing is placed on the supporting device, the traction device is installed on the lifting device and bypasses the supporting device to be connected to the end of the bushing, the wire pulling device is installed at the end of the supporting device, and the wire pulling device passes through the bushing and is connected to the transformer winding lead.

[0009] In the above manner, the casing is placed on the supporting device by a crane, and the work of the crane is completed. It can be used to assist other places where the crane is required to work. Subsequently, it is connected to the casing through the traction device, and the telescopic rod is extended into the bottom of the casing through the pulling device through the head of the casing. The lifting device is driven to lift the supporting device to the installation position, and the casing is tilted, and the winding lead is pulled out and connected to the pulling device. The lifting device continues to tilt the casing, and the traction device pulls the casing and slowly lowers it. During this period, the workers assist in supporting the casing, and the pulling device pulls out the winding lead. Then the workers connect the lead connector to the casing through a pin.

[0010] Furthermore, the lifting device includes: a first lifting column, a second lifting column and a counterweight box, the counterweight box is installed on the chassis, the first lifting column and the second lifting column are both arranged inside the counterweight box and the top ends extend out of the counterweight box, and the top ends of the first lifting column and the second lifting column are both hinged to the bottom of the support device.

[0011] Through the above method, a weight that increases the weight of the main body and a driving device for the lifting column are set in the counterweight box. The two lifting columns are placed at both ends of the supporting device. When the two lifting columns lift the supporting device to the operating height, the supporting device can be tilted by controlling the second lifting column at the rear end to continue to rise, which is convenient for the installation of the sleeve.

[0012] Furthermore, the traction device includes: an electric hoist, a pulley and a wire rope, the electric hoist is fixedly connected to the rear end of the lifting device, the pulley is rotatably connected to the rear end of the supporting device, one end of the wire rope is connected to the end of the sleeve, and the other end passes around the pulley and is connected to the electric hoist.

[0013] In the above manner, the electric hoist pulls the casing through the pulley and wire rope, which can fix and lower the casing.

[0014] Furthermore, the wire pulling device includes an adjusting bracket and an electric telescopic rod, the adjusting bracket is slidably connected to the rear end of the supporting device, the electric telescopic rod is fixedly connected to the adjusting bracket, and the bolt head at the end of the electric telescopic rod passes through the sleeve and is connected to the end of the transformer winding lead.

[0015] Furthermore, the adjustment bracket includes a slider, an adjustment plate and a butterfly nut. There are two sliders. A slide groove is provided at the rear end of the support device. The slider is slidably connected to the slide groove. Both ends of the adjustment plate are fixedly connected to the slider. The electric telescopic rod is fixedly connected to the adjustment plate. The butterfly nut is connected to the side of the slider and is in contact with the support device.

[0016] Furthermore, the adjustment plate includes: a slide plate, a sleeve plate, a limit block and an elastic member. A through hole is provided on the sleeve plate, the telescopic end of the electric telescopic rod passes through the through hole, the limit block is fixedly connected to the inner wall of the sleeve plate, the slide plate is inserted into the sleeve plate and is slidably connected between the limit block and the inner wall of the sleeve plate, and the end of the slide plate is connected to the inner wall of the sleeve plate through the elastic member.

[0017] Through the above method, by adjusting the position of the slider on the supporting device, the height position of the adjustment bracket can be controlled so that the electric telescopic rod on the adjustment bracket can be aligned with the middle of the sleeve. The slide plate and the sleeve plate are slidably connected and are provided with elastic parts, which can be freely extended and retracted and are stable under the support of the slider.

[0018] Furthermore, it also includes a positioning device, one end of which is connected to the upper part of the adjustment bracket, and the other end is overlapped with the end of the sleeve.

[0019] Furthermore, the positioning device includes a hinge and a positioning arc plate, one end of the hinge is connected to the upper part of the adjustment bracket, and the other end is fixedly connected to the positioning arc plate, and the positioning arc plate is overlapped on the end of the sleeve.

[0020] In the above manner, the positioning arc plate is movably connected to the upper part of the adjustment bracket through the hinge. When the adjustment bracket is adjusted to a height, the positioning arc plate can overlap the end of the sleeve to play a positioning role.

[0021] In summary, the explosion-proof composite insulating rubber-impregnated paper bushing and installation equipment of the present invention have the following advantages and beneficial technical effects:

[0022] 1. The explosion-proof composite insulating rubber-impregnated paper casing of the present invention has an integral sealing sleeve installed at the end of the conduit, which can achieve a better sealing effect, improve the overall stability of the device, and increase the service life;

[0023] 2. The explosion-proof composite insulation paper-impregnated bushing installation device of the present invention can replace the function of the crane to a certain extent, assisting in moving the bushing from the bottom to the installation position and replacing manual pulling of the winding lead wire;

[0024] 3. The wire pulling device of the explosion-proof composite insulating rubber-impregnated paper bushing installation equipment of the present invention is height-adjustable, enabling adaptation to bushings of different sizes. The height of the adjustment bracket can be adjusted according to actual conditions, replacing the time-consuming manual pulling process, saving manpower, and increasing installation speed.

[0025] 4. The positioning device of the installation equipment of the explosion-proof composite insulating glue-impregnated paper sleeve of the present invention can cooperate with the height adjustment of the wire pulling device, can determine the position of the adjusting bracket, improve the accuracy of the adjusting bracket after adjusting the height, further save the workers' time in adjusting the height of the adjusting bracket, and enable the electric telescopic rod to pass through the sleeve more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0027] Figure 1 This is a structural schematic diagram of an explosion-proof composite insulating rubber-impregnated paper bushing of the present invention;

[0028] Figure 2 This invention Figure 1 A magnified view of middle A;

[0029] Figure 3 This is a structural schematic diagram of an installation device for an explosion-proof composite insulating rubber-impregnated paper bushing according to the present invention;

[0030] Figure 4 This is a front view of an installation device for an explosion-proof composite insulating rubber-impregnated paper bushing according to the present invention;

[0031] Figure 5 This invention Figure 3 Enlarged view of middle B;

[0032] Figure 6 The present invention is a schematic structural diagram of an adjustment bracket of an installation device for an explosion-proof composite insulating rubber-impregnated paper bushing.

[0033] The reference numerals in the accompanying drawings are:

[0034] 1- Outer insulation sleeve; 2- Conduit; 3- Glue-impregnated paper insulation; 4- Sealing sleeve; 5- Lead connector; 6- Terminal block; 7- Chassis;

[0035] 8-lifting device; 81-first lifting column; 82-second lifting column; 83-counterweight box;

[0036] 9-support device; 91-chute;

[0037] 10- traction device; 101- electric hoist; 102- pulley; 103- wire rope;

[0038] 11-wire pulling device; 111-adjusting bracket; 1111-slider; 1112-adjusting plate; 1113-slide plate; 1114-sleeve plate; 1115-limiting block; 1116-elastic member; 1117-butterfly nut;

[0039] 112-electric telescopic rod; 1121-bolt head;

[0040] 113 - positioning device; 1131 - hinge; 1132 - positioning arc plate; 114 - through hole. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions; the embodiments described are part of the embodiments of the present invention, not all of the embodiments; the embodiments and directional terms described below with reference to the drawings are exemplary and intended to be used to explain the present invention, and cannot be understood as limitations on the present invention; based on the embodiments in 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. The parts and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. The embodiments of the present invention are described in detail below in conjunction with the drawings:

[0042] Example 1

[0043] like Figure 1 As shown, an explosion-proof composite insulating rubber-impregnated paper sleeve comprises: an outer insulating sleeve 1, a conduit 2, a rubber-impregnated paper insulation part 3, a lead joint 5 and a terminal head 6. The middle section and the upper section of the conduit 2 are placed inside the outer insulating sleeve 1 and are coaxial. The rubber-impregnated paper insulation part 3 is arranged in the middle section and the lower section of the conduit 2. The upper end of the conduit 2 is fixedly connected to the outer insulating sleeve 1 through a flange. The rubber-impregnated paper insulation part 3 in the middle section of the conduit 2 is fixedly connected to the lower end of the outer insulating sleeve 1 through a flange. The terminal head 6 is fixed to the end of the conduit 2 by a pin through the conduit 2 via a lead wire. The end of the terminal head 6 is fixedly connected to the lead joint 5 by a bolt connection.

[0044] like Figure 1and Figure 2 As shown, it also includes a sealing sleeve 4, which is sleeved on the end of the conduit 2 and located between the conduit 2 and the end flange. The sealing sleeve 4 is provided with two annular sealing protrusions.

[0045] Example 2

[0046] like Figure 3 and Figure 4 As shown, an installation device for an explosion-proof composite insulating rubber-impregnated paper bushing includes: a chassis 7, a lifting device 8, a supporting device 9, a traction device 10 and a wire pulling device 11. The supporting device 9 is a V-shaped folded plate structure. The lifting device 8 is installed on the chassis 7. The lifting end of the lifting device 8 is hinged to the bottom surface of the supporting device 9. The bushing is placed on the supporting device 9. The traction device 10 is installed on the lifting device 8 and bypasses the supporting device 9 to be connected to the end of the bushing. The wire pulling device 11 is installed at the end of the supporting device 9. The wire pulling device 11 passes through the bushing and is connected to the transformer winding lead.

[0047] like Figure 3 and Figure 4 As shown, the lifting device 8 includes a first lifting column 81, a second lifting column 82, and a counterweight box 83. The counterweight box 83 is mounted on the chassis 7. The first lifting column 81 and the second lifting column 82 are both located inside the counterweight box 83, with their top ends extending out of the counterweight box 83. The top ends of the first lifting column 81 and the second lifting column 82 are hinged to the bottom of the support device 9. The counterweight box 83 contains a weight to increase the weight of the main body and a drive device for the lifting columns. The first lifting column 81 and the second lifting column 82 are respectively mounted at the front and rear ends of the support device 9. After the two lifting columns have raised the support device 9 to the operating height, the support device 9 can be tilted by controlling the second lifting column 82 at the rear end to continue rising, facilitating the installation of the sleeve.

[0048] like Figure 3 and Figure 5 As shown, the traction device 10 includes: an electric hoist 101, a pulley 102 and a wire rope 103. The electric hoist 101 is fixed to the rear end of the lifting device 8 by means of bolts, and the pulley 102 is rotatably connected to the rear end of the support device 9 through a rotating shaft. One end of the wire rope 103 is connected to the end of the sleeve, and the other end passes around the pulley 102 and is connected to the electric hoist 101.

[0049] like Figure 3 and Figure 5 As shown, the wire pulling device 11 includes an adjusting bracket 111 and an electric telescopic rod 112. The adjusting bracket 111 is slidably connected to the rear end of the supporting device 9. The electric telescopic rod 112 is fixedly connected to the adjusting bracket 111 by bolts. The bolt head 1121 at the end of the electric telescopic rod 112 passes through the sleeve and is connected to the end of the transformer winding lead.

[0050] like Figure 3 and Figure 5 As shown, the adjustment bracket 111 includes a slider 1111, an adjustment plate 1112 and a butterfly nut 1117. There are two sliders 1111. The rear end of the support device 9 is provided with a slide groove 91. The end of the slider 1111 is provided with a protruding claw. The claw is clamped inside the slide groove 91, which can realize the slider 1111 sliding on the slide groove 91. The slider 1111 is slidably connected to the slide groove 91. Both ends of the adjustment plate 1112 are fixed with the slider 1111 by bolt connection. The electric telescopic The rod 112 is fixedly connected to the adjustment plate 1112 by bolts, the butterfly nut 1117 is connected to the side of the slider 1111 and is in contact with the support device 9, the butterfly nut 1117 is connected to the side of the slider 1111 by threads, and the end passes through the slider 1111 and is connected to the support device 9. After the butterfly nut 1117 is tightened, the slider 1111 can be tightened to the support device 9 when the claw and the slide groove 91 are connected, thereby supporting the adjustment plate 1112.

[0051] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the adjustment plate 1112 includes a slide plate 1113, a sleeve plate 1114, a limit block 1115, and an elastic member 1116. The sleeve plate 1114 is provided with a through hole 114. The electric telescopic rod 112 is fixed to the sleeve plate 1114 by bolts, with the telescopic end passing through the through hole 114. The slide plate 1113 is inserted into the sleeve plate 1114 and slidably connected between the limit block 1115 and the inner wall of the sleeve plate 1114. The limit block 1115 is fixedly connected to the inner wall of the sleeve plate 1114 by welding. The end of the slide plate 1113 is connected to the inner wall of the sleeve plate 1114 via the elastic member 1116. The elastic member 1116 is a spring.

[0052] like Figure 3 and Figure 5 As shown, the device further includes a positioning device 113, one end of which is connected to the upper portion of the adjustment bracket 111 and the other end of which overlaps the end of the sleeve. The positioning device 113 includes a hinge 1131 and a positioning arc plate 1132. One end of the hinge 1131 is bolted to the upper portion of the adjustment bracket 111 and the other end is fixedly connected to one end of the positioning arc plate 1132 via bolts. The other end of the positioning arc plate 1132 overlaps the end of the sleeve.

[0053] The method for using the installation device of the explosion-proof composite insulating rubber-impregnated paper bushing of the present invention is as follows:

[0054] The sleeve in Example 1 of the present application is placed on the supporting device 9 through a crane, with the end facing one end of the traction device 10. The sleeve is connected to the electric hoist 101 by passing the wire rope 103 around the pulley 102. The height of the slider 1111 at the end of the supporting device 9 is adjusted so that the end of the electric telescopic rod 112 is aligned with the middle through hole of the sleeve. The electric telescopic rod 112 is started so that the end extends out of the bottom of the sleeve. The lifting device 8 is started to raise the supporting device 9 to the working position, and then the second lifting column 82 is driven to tilt the supporting device 9, and the winding lead is connected to the end of the electric telescopic rod 112. With the assistance of the staff, the traction device 10 lowers the sleeve and connects it to the transformer. During this period, the pulling device 11 pulls out the winding lead and fixes the lead joint to the end of the sleeve through a pin shaft.

[0055] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An explosion-proof composite insulating rubber-impregnated paper bushing, characterized in that: include: An outer insulating sleeve (1), a conduit (2), a glue-impregnated paper insulation portion (3), a lead connector (5) and a terminal head (6), wherein the middle section and the upper section of the conduit (2) are placed inside the outer insulating sleeve (1) and are coaxial, the glue-impregnated paper insulation portion (3) is arranged at the middle section and the lower section of the conduit (2), the upper end of the conduit (2) is fixedly connected to the outer insulating sleeve (1) through a flange, the glue-impregnated paper insulation portion (3) in the middle section of the conduit (2) is fixedly connected to the lower end of the outer insulating sleeve (1) through a flange, the terminal head (6) is fixed to the end of the conduit (2) by passing a lead through the conduit (2), and the terminal head (6) is fixedly connected to the lead connector (5); Equipment for installing an explosion-proof composite insulating rubber-impregnated paper bushing on a transformer, comprising: a chassis (7), a lifting device (8), a supporting device (9), a traction device (10) and a wire pulling device (11), wherein the supporting device (9) is a V-shaped folded plate structure, the lifting device (8) is installed on the chassis (7), the lifting end of the lifting device (8) is hinged to the bottom surface of the supporting device (9), the bushing is placed on the supporting device (9), the traction device (10) is installed on the lifting device (8) and bypasses the supporting device (9) to be connected to the end of the bushing, the wire pulling device (11) is installed at the end of the supporting device (9), and the wire pulling device (11) passes through the bushing and is connected to the transformer winding lead; The wire pulling device (11) includes an adjustment bracket (111) and an electric telescopic rod (112), wherein the adjustment bracket (111) is slidably connected to the rear end of the support device (9), and the electric telescopic rod (112) is fixedly connected to the adjustment bracket (111), and the bolt head (1121) at the end of the electric telescopic rod (112) passes through a sleeve and is connected to the end of the transformer winding lead.

2. The explosion-proof composite insulating rubber-impregnated paper bushing according to claim 1, characterized in that: It also includes a sealing sleeve (4), which is sleeved on the end of the conduit (2) and located between the conduit (2) and the end flange, and is provided with a plurality of annular sealing protrusions on the sealing sleeve (4).

3. The explosion-proof composite insulating rubber-impregnated paper bushing according to claim 1, characterized in that: The lifting device (8) comprises: a first lifting column (81), a second lifting column (82) and a counterweight box (83); the counterweight box (83) is mounted on the chassis (7); the first lifting column (81) and the second lifting column (82) are both arranged inside the counterweight box (83) and their top ends extend out of the counterweight box (83); and the top ends of the first lifting column (81) and the second lifting column (82) are both hinged to the bottom of the supporting device (9).

4. The explosion-proof composite insulating rubber-impregnated paper bushing according to claim 1, characterized in that: The traction device (10) comprises: an electric hoist (101), a pulley (102) and a steel wire rope (103); the electric hoist (101) is fixedly connected to the rear end of the lifting device (8); the pulley (102) is rotatably connected to the rear end of the supporting device (9); one end of the steel wire rope (103) is connected to the end of the sleeve, and the other end passes around the pulley (102) and is connected to the electric hoist (101).

5. The explosion-proof composite insulating rubber-impregnated paper bushing according to claim 1, characterized in that: The adjustment bracket (111) includes a slider (1111), an adjustment plate (1112) and a butterfly nut (1117), there are two sliders (1111), a slide groove (91) is provided at the rear end of the support device (9), the slider (1111) is slidably connected to the slide groove (91), both ends of the adjustment plate (1112) are fixedly connected to the slider (1111), the electric telescopic rod (112) is fixedly connected to the adjustment plate (1112), and the butterfly nut (1117) is connected to the side of the slider (1111) and is in contact with the support device (9).

6. The explosion-proof composite insulating rubber-impregnated paper bushing according to claim 5, characterized in that: The regulating plate (1112) comprises: a slide plate (1113), a sleeve plate (1114), a limit block (1115) and an elastic member (1116); a through hole (114) is provided on the sleeve plate (1114); the telescopic end of the electric telescopic rod (112) passes through the through hole (114); the limit block (1115) is fixedly connected to the inner wall of the sleeve plate (1114); the slide plate (1113) is inserted into the sleeve plate (1114) and is slidably connected between the limit block (1115) and the inner wall of the sleeve plate (1114); and the end of the slide plate (1113) is connected to the inner wall of the sleeve plate (1114) via the elastic member (1116).

7. The explosion-proof composite insulating rubber-impregnated paper bushing according to claim 1, characterized in that: It also includes a positioning device (113), one end of which is connected to the upper part of the adjustment bracket (111), and the other end of which is overlapped with the end of the sleeve.

8. The explosion-proof composite insulating rubber-impregnated paper bushing according to claim 7, characterized in that: The positioning device (113) comprises a hinge (1131) and a positioning arc plate (1132), one end of the hinge (1131) is connected to the upper part of the adjustment bracket (111), and the other end is fixedly connected to the positioning arc plate (1132), and the positioning arc plate (1132) is overlapped on the end of the sleeve.

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