Switch oil conservator with oil level indicator

Abstract

The utility model belongs to the field of transformers, and relates to a novel switch oil conservator with an oil level indicator, an oil conservator body comprises a front panel, a rear panel and a side wall circumferential plate which are connected together in a sealing mode, the front panel and the rear panel are flat plates, the lower portion of the side wall circumferential plate is installed on a base, and the oil level indicator is installed on the front panel and communicated with the interior of the oil conservator body. A second round hole is formed in the center of the top of the side wall circumferential plate and communicates with a respirator through a breathing connecting pipe and a breathing pipe. A front side third round hole and a rear side fourth round hole are formed in the bottom of the side wall circumferential plate, the top end of the lower front side oil filling pipe is welded to the periphery of the front side third round hole, and the top end of the lower rear side main connecting pipe is welded to the periphery of the rear side fourth round hole. The oil storage tank body with flat plates on two sides and a cylindrical middle part is adopted, so that the oil storage tank body can be conveniently processed and subsequently welded and mounted on one side of the oil-immersed on-load tap-changing transformer, an additional fixed supporting structure is saved, and the capacity of the switch oil storage cabinet is more convenient to calculate.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformers and discloses a novel switch oil storage cabinet with an oil level gauge which is matched with a main transformer. Background Art

[0002] As one of the important equipment in the power grid, the safe and stable operation of the transformer is of vital importance. For oil-immersed on-load tap-changing transformers, the volume of the on-load tap-changing switch oil will change due to changes in the external environment temperature and its own oil temperature during operation, which will cause huge hidden dangers to the normal operation of the oil-immersed on-load tap-changing transformer.

[0003] In order to meet the requirements of power operation and maintenance for oil-immersed on-load tap-changing transformers, a separate switch oil conservator must be set up to balance the volume change of transformer oil caused by temperature change. Since most of the switch oil conservators currently used adopt an ellipsoidal structure with arc-shaped processing on both sides, the capacity calculation of the switch oil conservator is relatively cumbersome, and the fixed support structure of the switch oil conservator is also relatively complex, which is not conducive to rapid installation and commissioning on site. Utility Model Content

[0004] In order to solve the above technical problems, the utility model discloses a switch oil storage cabinet with an oil level gauge. The technical solution adopted by the utility model is:

[0005] The switch oil storage cabinet with an oil level gauge comprises an oil storage box body, wherein the oil storage box body comprises a front panel, a rear panel and a side wall circumferential plate which are sealed and connected together, wherein the front panel and the rear panel are flat plates, wherein the lower center position of the side wall circumferential plate is fixedly mounted on a base, wherein the oil level gauge is fixedly mounted on the front panel and is communicated with the inside of the oil storage box body, wherein a second circular hole is provided at the top center position of the side wall circumferential plate, wherein the lower end of a breathing joint pipe is welded to the outer periphery of the second circular hole, a circular flange 1 is welded to the upper end of the breathing joint pipe, a circular flange 2 is welded to the upper end of the breathing pipe, and the breathing pipe and the breathing joint pipe are fixedly connected into one body by bolts and nuts penetrating the circular flange 1 and the circular flange 2, wherein the breathing pipe is L-shaped curved The invention discloses a folding structure, wherein the long main pipe part of the breathing pipe is fixedly installed in a vertical direction on the outer side of one side wall of the side wall circular plate, and an end flange is arranged at the lower end of the breathing pipe, and the end flange connects the breathing pipe with the respirator; a third circular hole on the front side and a fourth circular hole on the rear side are arranged at the center position of the bottom of the side wall circular plate, an oil filling pipe connecting flange is welded to the bottom end of the lower front oil filling pipe, and the top end of the lower front oil filling pipe is welded to the outer periphery of the third circular hole on the front side, a main connecting pipe connecting flange is welded to the bottom end of the lower rear main connecting pipe, and the top end of the lower rear main connecting pipe is welded to the outer periphery of the fourth circular hole on the rear side, and the lower end of the breathing pipe, the oil filling pipe connecting flange and the main connecting pipe connecting flange are arranged on one side of the lower part of the on-load tap-changing transformer.

[0006] Preferably, a first circular hole is opened at the center position of the front panel, a plurality of studs are evenly welded on the periphery of the first circular hole, the oil level gauge is fixed on the studs using nuts, and an oil level gauge rain cover is welded on the front panel above the oil level gauge, and the oil level gauge rain cover is an arc-shaped plate bent downward.

[0007] Preferably, a fixed base is welded at the center of one side wall of the side wall circumferential plate, an inner thread hole is arranged on the fixed base, a U-shaped bent plate is screwed into the inner thread hole and installed on the outside of the fixed base, and the long main pipe of the breathing tube is located between the fixed base and the U-shaped bent plate.

[0008] Preferably, the base includes a U-shaped channel steel and a fixed plate welded together, the upper surfaces of both ends of the fixed plate are welded together with the lower surface of the U-shaped channel steel, an upper through hole is provided on the upper surface of the U-shaped channel steel, bolts are inserted into the upper through holes and nuts are screwed on to fix the welding bracket, a front connecting through hole and a rear connecting through hole are provided in the middle position of the fixed plate, one end of two parallel horizontal supporting steel beams is welded to the outside of the oil tank base of the on-load tap-changing transformer, an installation through hole is provided on the supporting steel beam, a lower through hole matching the installation through hole of the supporting steel beam is provided on the lower surface of the U-shaped channel steel, bolts are inserted into the lower through holes and nuts are screwed on the lower through holes, and the switch oil storage cabinet is fixedly installed on the two supporting steel beams.

[0009] Preferably, the top end of the lower front oil filling pipe passes through the front connecting through hole and is welded to the outer periphery of the front third circular hole, and the top end of the lower rear main connecting pipe passes through the rear connecting through hole and is welded to the outer periphery of the rear fourth circular hole.

[0010] Preferably, the welding bracket includes a pair of L-shaped structural steel plates arranged in parallel, and bracket through holes are opened on the horizontal plane of the L-shaped structural steel plates. The bracket through holes cooperate with the upper through holes on the upper plane of the U-shaped channel steel. The L-shaped structural steel plates are fixedly installed on the base by bolts and nuts, and the top of the vertical surface of the L-shaped structural steel plate is welded to the outer wall of the lower part of the side wall circular plate.

[0011] Preferably, a plugging plate is welded to the front end of a pair of U-shaped channel steels.

[0012] Beneficial effects of the utility model:

[0013] The switch oil conservator body of the utility model adopts a structure with two flat plates on both sides and a cylindrical shape in the middle, which is convenient for processing and subsequent welding and installation on one side of the oil-immersed on-load voltage-changing transformer, saving an additional fixed support structure, and the capacity calculation of the switch oil conservator is also simpler. The oil conservator of the utility model is a device with a simple structure, economical and practical, and safe and reliable compensation, which meets the requirements for oil level balance compensation of the oil-immersed on-load voltage-changing transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the switch oil storage cabinet according to an embodiment of the utility model;

[0016] Figure 2 This is a front view of the switch oil storage cabinet of the embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the switch oil storage cabinet base according to an embodiment of the utility model;

[0018] Figure 4 A top view of the base of the switch oil storage cabinet according to an embodiment of the utility model;

[0019] Among them, 1 is the oil storage tank body, 2 is the oil level gauge, 3 is the oil level gauge rain cover, 4 is the breathing pipe, 5 is the lower front oil filling pipe, 6 is the lower rear main connecting pipe, 7 is the base, 8 is the first circular hole, 9 is the stud, 10 is the U-shaped bent plate, 11 is the front panel, 12 is the rear panel, 13 is the side wall circular plate, 14 is the welding bracket, 15 is the breathing connecting pipe, 16 is the circular flange 1, 17 is the U-shaped channel steel, 18 is the fixed flat plate, and 19 is the blocking plate. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] like Figure 1 , 2 As shown, the switch oil storage cabinet with an oil level gauge comprises an oil storage tank body 1, an oil level gauge 2 and a base 7. The oil storage tank body 1 is a sealed barrel structure, comprising a front panel 11, a rear panel 12 and a side wall circumferential plate 13 which are sealed and connected together. The lower part of the side wall circumferential plate 13 is fixedly mounted on the base 7, and the oil level gauge 2 is fixedly mounted on the front panel 12 of the oil storage tank body 1.

[0022] A first circular hole 8 is provided at the center of the front panel 12 of the oil storage tank 1. Several studs 9 are evenly welded on the periphery of the first circular hole 8. The studs 9 are used to fix and install the oil level gauge 2 by screwing in nuts. The oil level gauge 2 is sealed and connected to the inside of the oil storage tank 1 through the first circular hole 8. In order to improve the mechanical strength of the studs 9, a reinforcing plate with a circular ring structure can be welded on the periphery of the first circular hole 8, and then the ends of the studs 9 are welded to the outer surface of the reinforcing plate. An oil level gauge rain cover 3 is welded on the front panel 12 of the oil storage tank 1 above the oil level gauge 2. The oil level gauge rain cover 3 is an arc-shaped plate bent downward.

[0023] A second circular hole is provided at the center of the top of the circumferential plate 13 of the side wall of the oil storage tank body 1. The lower end of the breathing tube 15 is welded to the outer periphery of the second circular hole. The breathing tube 15 is sealed and connected to the inside of the oil storage tank body 1 through the second circular hole. A circular flange 16 is welded to the upper end of the breathing tube 15, and a circular flange 2 is welded to the upper end of the breathing tube 4. Bolts and nuts are used to penetrate the circular flange 16 and the circular flange 2 to fix the breathing tube 4 and the breathing tube 15 together. The breathing tube 4 is an L-shaped bending structure as a whole. The long main pipe part of the breathing tube 4 is fixedly installed in the vertical direction on the outer side of the right side wall of the circumferential plate 13 of the side wall of the oil storage tank body 1. A fixed base is welded at the center of the right side wall of the circumferential plate 13 of the side wall of the oil storage tank body 1. A fixed base is provided on the fixed base. There is an inner thread hole, a U-shaped bent plate 10, through holes matching the inner thread hole are opened at both ends of the U-shaped bent plate 10, and the U-shaped bent plate 10 is installed on the right side of the fixed base by screws passing through the through holes and screwing into the inner thread holes. The long main pipe of the breathing tube 4 is located between the fixed base and the U-shaped bent plate 10, and the breathing tube 4 is reliably fixed and installed through the fixed base and the U-shaped bent plate 10. The lower end of the breathing tube 4 is provided with an end flange, and the breathing tube 4 is connected to the respirator through the end flange, and the respirator is used to absorb moisture in the air. The lower end of the breathing tube 4 is usually arranged at a convenient position on the lower side of the on-load voltage-changing transformer, and the height of the lower end of the breathing tube 4 from the ground is about 1.6m.

[0024] like Figure 3 , 4 As shown, the base 7 includes a U-shaped channel steel 17, a fixed plate 18 and a plugging plate 19 welded together. The upper surfaces of the two ends of the fixed plate 18 are welded together with the lower surface of the U-shaped channel steel 17. The upper surface of the U-shaped channel steel 17 is provided with an upper through hole, and bolts are inserted into the upper through hole and nuts are screwed on to install the welding bracket 14. The front ends of a pair of U-shaped channel steels 17 are connected to the plugging plate 19 by welding. The middle position of the fixed plate 18 is provided with a front side connecting through hole and a rear side connecting through hole. Two parallel horizontal supporting steel beams are welded on the outer side of the oil tank base of the on-load tap-changing transformer, and mounting through holes are provided on the supporting steel beams. The lower surface of the U-shaped channel steel 17 is provided with a lower through hole that matches the mounting through hole of the supporting steel beam, and bolts are inserted into the lower through hole and the mounting through hole and nuts are screwed on to fix and install the switch oil storage cabinet as a whole, and the switch oil storage cabinet is firmly fixed on the two supporting steel beams.

[0025] The third front circular hole and the fourth rear circular hole are provided at the center of the bottom of the side wall circumferential plate 13 of the oil storage tank 1. The bottom end of the lower front oil filling pipe 5 is welded with an oil filling pipe connection flange. The top end of the lower front oil filling pipe 5 passes through the front connection through hole and is welded to the outer periphery of the third front circular hole. The lower front oil filling pipe 5 is connected to the bottom of the oil storage tank 1 through the third front circular hole. The bottom end of the lower rear main connecting pipe 6 is welded with a main connecting pipe connection flange. The top end of the lower rear main connecting pipe 6 passes through the rear connection through hole and is welded to the outer periphery of the fourth rear circular hole. The lower rear main connecting pipe 6 is connected to the bottom of the oil storage tank 1 through the fourth rear circular hole. The reason why the lower front oil filling pipe 5 and the lower rear main connecting pipe 6 pass through the fixed plate 18 is to prevent accidental contact and damage to the lower front oil filling pipe 5 and the lower rear main connecting pipe 6. The lower front oil filling pipe 5 and the lower rear main connecting pipe 6 are connected to the oil tank of the on-load voltage-changing transformer through the oil filling pipe connecting flange and the main connecting pipe connecting flange respectively, that is, the oil storage tank 1 is connected to the oil tank of the on-load voltage-changing transformer, and the oil storage tank 1 is used to balance the increase and decrease of oil in the oil tank of the on-load voltage-changing transformer. The lower ends of the lower front oil filling pipe 5 and the lower rear main connecting pipe 6 are usually arranged at a convenient position on the lower side of the on-load voltage-changing transformer, and the height of the lower ends of the lower front oil filling pipe 5 and the lower rear main connecting pipe 6 from the ground is about 1.6m.

[0026] The welding bracket 14 is a pair of L-shaped structural steel plates arranged in parallel, and a bracket through hole is provided on the horizontal surface of the L-shaped structural steel plate, and the bracket through hole is matched with the upper through hole of the upper plane of the U-shaped channel steel 17, and the welding bracket 14 is fixed to the base 7 by bolts and nuts. The top of the vertical surface of the L-shaped structural steel plate is welded to the outer wall of the lower part of the side wall circumferential plate 13, and the base 7 and the oil storage tank body 1 are reliably connected into one body through the welding bracket 14.

[0027] After the on-site connecting pipeline of the switch oil conservator is installed, oil is added according to the on-site temperature. If the on-site temperature changes greatly, causing the volume of the insulating oil in the on-load tap-changing switch oil tank to change, the increase and decrease of oil is balanced through the main connecting pipe and the switch oil conservator.

[0028] In the embodiments of the utility model, the technical features not described in detail are all existing technologies or conventional technical means and will not be described in detail here.

[0029] Finally, it should be noted that the above embodiments are only specific implementation methods of the present utility model, which are used to illustrate the technical solution of the present utility model, rather than to limit it, and the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any technician familiar with the technical field can modify the technical solution recorded in the above embodiments within the technical scope disclosed by the present utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the present utility model, and should be covered within the protection scope of the present utility model.

Claims

1. A switch oil conservator with an oil level gauge, comprising an oil storage tank, characterized in that: The oil storage box body comprises a front panel, a rear panel and a side wall circumferential plate which are sealed and connected together, the front panel and the rear panel are flat plates, the lower center position of the side wall circumferential plate is fixedly mounted on the base, the oil level gauge is fixedly mounted on the front panel and is communicated with the inside of the oil storage box body, a second circular hole is opened at the top center position of the side wall circumferential plate, the lower end of the breathing tube is welded to the outer periphery of the second circular hole, a circular flange 1 is welded to the upper end of the breathing tube, a circular flange 2 is welded to one end of the upper part of the breathing tube, bolts and nuts are used to penetrate the circular flange 1 and the circular flange 2 to fix the breathing tube and the breathing tube together, the breathing tube is an L-shaped bending structure, and the length of the breathing tube is The main pipe part is fixedly installed in a vertical direction on the outer side of one side wall of the side wall circular plate, and an end flange is arranged at the lower end of the breathing pipe, which connects the breathing pipe with the respirator; a third front circular hole and a fourth rear circular hole are opened at the center position of the bottom of the side wall circular plate, an oil filling pipe connecting flange is welded to the bottom end of the lower front oil filling pipe, and the top end of the lower front oil filling pipe is welded to the outer periphery of the third front circular hole, a main connecting pipe connecting flange is welded to the bottom end of the lower rear main connecting pipe, and the top end of the lower rear main connecting pipe is welded to the outer periphery of the fourth rear circular hole, and the lower end of the breathing pipe, the oil filling pipe connecting flange and the main connecting pipe connecting flange are arranged on one side of the lower part of the on-load tap-changing transformer.

2. The switch oil conservator with oil level gauge according to claim 1, characterized in that: A first circular hole is opened at the center of the front panel, and a plurality of studs are evenly welded on the periphery of the first circular hole. The oil level gauge is fixedly installed on the studs using nuts, and an oil level gauge rain cover is welded on the front panel above the oil level gauge, and the oil level gauge rain cover is a downwardly bent arc plate.

3. The switch oil conservator with oil level gauge according to claim 1, characterized in that: A fixed base is welded at the center of one side wall of the side wall circumferential plate, an inner thread hole is arranged on the fixed base, a U-shaped bent plate is screwed into the inner thread hole and installed on the outside of the fixed base, and the long main pipe of the breathing tube is located between the fixed base and the U-shaped bent plate.

4. The switch oil conservator with oil level gauge according to any one of claims 1 to 3, characterized in that: The base includes a U-shaped channel steel and a fixed plate welded together, the upper surfaces of the two ends of the fixed plate are welded to the lower surface of the U-shaped channel steel, an upper through hole is provided on the upper surface of the U-shaped channel steel, bolts are inserted into the upper through holes and nuts are screwed on to fix the welding bracket, a front connecting through hole and a rear connecting through hole are provided in the middle position of the fixed plate, one end of two parallel horizontal supporting steel beams is welded to the outside of the oil tank base of the on-load tap-changing transformer, an installation through hole is provided on the supporting steel beam, a lower through hole matching the installation through hole of the supporting steel beam is provided on the lower surface of the U-shaped channel steel, bolts are inserted into the lower through holes and nuts are screwed on the lower through holes, and the switch oil storage cabinet is fixedly installed on the two supporting steel beams.

5. The switch oil conservator with oil level gauge according to claim 4, characterized in that: The top end of the lower front oil filling pipe passes through the front connecting through hole and is welded to the outer periphery of the front third circular hole. The top end of the lower rear main connecting pipe passes through the rear connecting through hole and is welded to the outer periphery of the rear fourth circular hole.

6. The switch oil conservator with oil level gauge according to claim 4, characterized in that: The welding bracket includes a pair of L-shaped structural steel plates arranged in parallel, and bracket through holes are opened on the horizontal surfaces of the L-shaped structural steel plates. The bracket through holes cooperate with the upper through holes on the upper plane of the U-shaped channel steel. The L-shaped structural steel plates are fixedly installed on the base by bolts and nuts, and the top of the vertical surface of the L-shaped structural steel plates is welded to the outer wall of the lower part of the side wall circular plate.

7. The switch oil conservator with oil level gauge according to claim 4, characterized in that: A pair of U-shaped channel steels are welded with blocking plates at the front end.

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