Pressure release device of oil-immersed transformer

Abstract

The utility model discloses a pressure release device of an oil-immersed transformer, which belongs to the technical field of oil-immersed transformers and comprises a shell, a threaded pipe is arranged at the bottom of the shell, a pressure release mechanism is arranged in an inner cavity of the shell, a threaded hole is arranged on the top surface of the shell, and a cleaning mechanism is arranged on the side of the shell. According to the transformer cooling device, when the pressure in the transformer is increased, high pressure can push the telescopic column and the piston plate to move upwards, gas in the transformer enters the shell from the threaded pipe, meanwhile, the gas entering the shell is exhausted from the snake-shaped heat exchange copper pipe, the gas exchanges heat with water in an inner cavity of the cooling box when flowing in the snake-shaped heat exchange copper pipe, and the cooling effect is improved. According to the pressure release device of the oil-immersed transformer, the oil liquid in the gas in the S-shaped heat exchange copper pipe is condensed into liquid drops, the oil drops are collected into the liquid collection screw cover from the liquid collection screw pipe, the function of effectively recycling the oil liquid in the high-pressure gas is achieved, and the practicability of the pressure release device of the oil-immersed transformer is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil -immersed transformer technical field more specifically, relate to a kind of pressure release device of oil -immersed transformer. BACKGROUND

[0002] Oil-immersed transformer is a widely used power transformer, it uses insulating oil to cool and insulate the components inside the transformer, this type of transformer is used to increase or reduce voltage to meet the power demand of different occasions, when the pressure inside the transformer exceeds the design allowable safety threshold, if it cannot be released in time, it can cause the deformation of transformer tank, weld crack even explosion, cause serious equipment damage and safety accident.

[0003] After retrieval, the utility model patent with announcement number CN222190406U discloses a kind of pressure release device of oil -immersed transformer, including shell, the upper side middle position of the shell is fixedly connected with air outlet box, the upper end of the air outlet box is penetrated and is equipped with a plurality of air outlet holes, the lower side of the shell is fixedly connected with threaded tube, the inside bottom plate of the shell is fixedly connected with limit plate on left and right sides, when the pressure of the lower side inside the shell is upwards, piston moves upwards, drives connecting column to move upwards, connecting column moves upwards and drives connecting plate to move upwards, connecting plate drives compression spring to change shape, when piston is separated from two limit plates, gas in the shell is discharged from the air outlet box installed in the upper end of the shell, the oil discharged from oil outlet pipe and oil guide pipe flows into the collection box in the collection box in collecting box, avoid oil directly falling on transformer or surrounding and causing corrosion and damage on the surface of transformer, especially the metal surface exposed to oil for a long time.But the above-mentioned patent still has the following deficiencies: some oil and hot gas are mixed together and move upwards, it is not convenient to separate oil and gas, oil and hot gas are still discharged from air outlet hole, practicability is poor, in addition, as oil enters the shell, part of oil will be attached to the pressure release assembly in the shell, affect the difficulty of subsequent piston plate moving upwards by gas pressure, for this purpose, a kind of pressure release device of oil -immersed transformer is proposed. UTILITY MODEL CONTENT

[0004] In view of the problems existing in the prior art, the utility model aims at providing a kind of pressure release device of oil -immersed transformer.

[0005] To solve the above problems, the utility model adopts the following technical solutions:

[0006] The utility model provides an oil -immersed transformer's pressure release device, including the shell, the bottom of shell is provided with the threaded pipe, the inner chamber of shell is provided with pressure release mechanism, the top surface of shell is opened the threaded hole, the side of shell is provided with the cleaning mechanism, the side of shell is fixedly connected with the cooling box, the side of shell is fixedly sleeved with the serpentine heat exchange copper pipe, the end of serpentine heat exchange copper pipe penetrates the inner chamber of cooling box and extends to the outside of cooling box, the bottom of serpentine heat exchange copper pipe is provided with the liquid collecting screw pipe, the bottom of liquid collecting screw pipe is fixedly sleeved to the bottom of cooling box and is screw -threaded with the liquid collecting screw cover, the outside of shell bottom is fixedly installed with the first switch valve, and the end of first switch valve extends to the bottom of shell inner chamber.

[0007] As a preferred scheme of the utility model, the cleaning mechanism includes a water tank arranged outside the shell, the inner chamber of the water tank is fixedly installed with an electric heating rod, the top surface of the water tank is fixedly installed with a water pump, both ends of the water pump are fixedly connected with water guide pipes, the bottom end of one water guide pipe extends into the inner chamber of the water tank, the end of the other water guide pipe penetrates the threaded hole and extends into the inner chamber of the shell, the top surface of the water tank is fixedly installed with a control panel, and the side of the water tank is provided with a storage battery.

[0008] As a preferred scheme of the utility model, the pressure release mechanism includes a square tube fixedly connected to the top of the inner chamber of the shell and a spring, the spring is located inside the square tube, the bottom end of the spring is fixedly connected with an extension column, the bottom end of the extension column extends into the inner chamber of the shell and is fixedly connected with a piston plate, the bottom surface of the piston plate is attached to the bottom surface of the inner chamber of the shell, the piston plate is located directly above the threaded pipe, and the side of the extension column is attached to the inner wall of the square tube.

[0009] As a preferred scheme of the utility model, the top surface of the cooling box is screw-threadedly installed with a second screw plug, and the side of the cooling box is fixedly installed with a second switch valve.

[0010] As a preferred scheme of the utility model, the top surface of the water tank is screw-threadedly installed with a third screw plug, and the top surface of the water tank is fixedly installed with a handle.

[0011] As a preferred scheme of the utility model, the side of the shell is fixedly connected with a connecting rope, the end of the connecting rope is fixedly connected with a first screw plug, and the first screw plug is matched with the threaded hole.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] (1) The utility model discloses a pressure release device of oil -immersed transformer, including the casing, the water tank, the cooling box, the screw pipe, the screw cap, the water pump, the water pipe, the handle, the control panel, the battery, the third screw plug, the connecting rope, the first screw plug, the first switch valve, the square pipe, the spring, the telescopic column, the piston plate, the second screw plug, the second switch valve, the casing is internally formed with the cavity, the water tank is internally formed with the cavity, the cooling box is internally formed with the cavity, the screw pipe is internally formed with the cavity, the water pump is internally formed with the cavity, the water pipe is internally formed with the cavity, the handle is internally formed with the cavity, the control panel is internally formed with the cavity, the battery is internally formed with the cavity, the third screw plug is internally formed with the cavity, the connecting rope is internally formed with the cavity, the first screw plug is internally formed with the cavity, the first switch valve is internally formed with the cavity, the square pipe is internally formed with the cavity, the spring is internally formed with the cavity, the telescopic column is internally formed with the cavity, the piston plate is internally formed with the cavity, the second screw plug is internally formed with the cavity, the second switch valve is internally formed with the cavity, when the pressure in the transformer increases, the high pressure pushes the telescopic column and piston plate and moves up, the gas in the transformer enters the casing from the screw pipe, and the gas entering the casing is discharged from the serpentine heat exchange copper pipe, the gas flows in the serpentine heat exchange copper pipe and exchanges heat with the water in the cooling box cavity, thereby condensing the oil carried by the gas in the serpentine heat exchange copper pipe into droplets, the oil droplets are collected in the liquid collecting screw cap from the liquid collecting screw pipe, the function of effectively recycling the oil in the high pressure gas is realized, and the practicability of the pressure release device of the oil -immersed transformer is improved.

[0014] (2) The utility model discloses a pressure release device of oil -immersed transformer, including the casing, the water tank, the cooling box, the screw pipe, the screw cap, the water pump, the water pipe, the handle, the control panel, the battery, the third screw plug, the connecting rope, the first screw plug, the first switch valve, the square pipe, the spring, the telescopic column, the piston plate, the second screw plug, the second switch valve, when needing to clean the cavity of the casing, the end of the water pipe is inserted into the cavity of the casing from the threaded hole, the electric heating rod is electrified to heat the cleaning water in the water tank, the hot water in the water tank is introduced into the cavity of the casing by the water pump, the oil in the inner wall of the casing and the square pipe, the telescopic column and the piston plate side is cleaned by the hot water in the cavity of the casing, in addition, the hot water enters the serpentine heat exchange copper pipe and cleans the oil on the inner wall of the serpentine heat exchange copper pipe, the cleaning water flows out from the end of the serpentine heat exchange copper pipe, the function of cleaning the cavity of the casing is realized, the oil adhered to the pressure release mechanism in the cavity of the casing is avoided to affect the release of air pressure, and the practicability of the pressure release device of the oil -immersed transformer is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of the utility model;

[0016] Figure 2 It is the sectional view schematic diagram of the casing of the utility model;

[0017] Figure 3 It is the structure schematic diagram of the casing of the utility model;

[0018] Figure 4 It is the sectional view schematic diagram of the water tank of the utility model.

[0019] Mark explanation in drawing:

[0020] 1, casing;2, screw pipe;3, threaded hole;4, cleaning mechanism;5, pressure release mechanism;6, cooling box;7, serpentine heat exchange copper pipe;8, liquid collecting screw pipe;9, liquid collecting screw cap;10, water tank;11, electric heating rod;12, water pump;13, water pipe;14, handle;15, control panel;16, battery;17, third screw plug;18, connecting rope;19, first screw plug;20, first switch valve;21, square pipe;22, spring;23, telescopic column;24, piston plate;25, second screw plug;26, second switch valve. DETAILED DESCRIPTION

[0021] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0022] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood in a broad sense, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication between two elements inside. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] Embodiment:

[0025] Please refer to Figures 1-4 A pressure release device of an oil-immersed transformer, comprising a shell 1, a threaded pipe 2 is arranged at the bottom of the shell 1, a pressure release mechanism 5 is arranged in the inner cavity of the shell 1, a threaded hole 3 is formed in the top surface of the shell 1, a cleaning mechanism 4 is arranged at the side of the shell 1, a cooling box 6 is fixedly connected to the side of the shell 1, a serpentine heat exchange copper pipe 7 is fixedly sleeved to the side of the shell 1, the end of the serpentine heat exchange copper pipe 7 penetrates the inner cavity of the cooling box 6 and extends to the outside of the cooling box 6, a liquid collecting screw pipe 8 is arranged at the bottom end of the serpentine heat exchange copper pipe 7, the bottom end of the liquid collecting screw pipe 8 is fixedly sleeved to the bottom of the cooling box 6 and a liquid collecting screw cover 9 is threadedly mounted, a first on-off valve 20 is fixedly mounted on the outside of the bottom end of the shell 1, and the end of the first on-off valve 20 extends to the bottom of the inner cavity of the shell 1.

[0026] In the present embodiment, the liquid collecting screw cover 9 below the liquid collecting screw pipe 8 can be removed to clean the collected oil.

[0027] Specifically, please refer to Figure 1 and Figure 4The cleaning mechanism 4 comprises a water tank 10 arranged outside the shell 1, an electric heating rod 11 fixedly arranged in the inner cavity of the water tank 10, a water pump 12 fixedly arranged on the top surface of the water tank 10, two water pipes 13 fixedly connected to the two ends of the water pump 12 respectively, the bottom end of one water pipe 13 extending into the inner cavity of the water tank 10, the other water pipe 13 extending into the inner cavity of the shell 1 through the threaded hole 3, a control panel 15 fixedly arranged on the top surface of the water tank 10, and a storage battery 16 arranged on the side of the water tank 10.

[0028] In the embodiment, the control panel 15 is used to control the water pump 12 and the electric heating rod 11, and the storage battery 16 is used to supply power to the control panel 15, the electric heating rod 11 and the water pump 12.

[0029] Specifically, please refer to Figure 2 The pressure releasing mechanism 5 comprises a square tube 21 and a spring 22 fixedly connected to the top of the inner cavity of the shell 1, the spring 22 is arranged inside the square tube 21, the bottom end of the spring 22 is fixedly connected with an extendable column 23, the bottom end of the extendable column 23 extends into the inner cavity of the shell 1 and is fixedly connected with a piston plate 24, the bottom surface of the piston plate 24 is attached to the bottom surface of the inner cavity of the shell 1, the piston plate 24 is arranged directly above the threaded tube 2, and the side surface of the extendable column 23 is attached to the inner wall of the square tube 21.

[0030] In the embodiment, the extendable column 23 and the piston plate 24 are made of light and corrosion-resistant material, and the inner wall of the square tube 21 is used to limit the extendable column 23, so as to ensure the stability of the extendable column 23 and the piston plate 24.

[0031] Specifically, please refer to Figure 1 and Figure 2 The top surface of the cooling tank 6 is threadedly arranged with a second screw plug 25, and the side surface of the cooling tank 6 is fixedly arranged with a second switch valve 26.

[0032] In the embodiment, the cooling water in the cooling tank 6 is discharged through the second switch valve 26, and the second screw plug 25 is removed to add cooling water into the cooling tank 6.

[0033] Specifically, please refer to Figure 4 The top surface of the water tank 10 is threadedly arranged with a third screw plug 17, and the top surface of the water tank 10 is fixedly arranged with a handle 14.

[0034] In the embodiment, water is added into the water tank 10 by removing the third screw plug 17, and the pressure releasing mechanism 5 is lifted by holding the handle 14, so as to release the pressure on the multiple transformers of the pressure releasing mechanism 5.

[0035] Specifically, please refer to Figure 3 The side surface of the shell 1 is fixedly connected with a connecting rope 18, the end of the connecting rope 18 is fixedly connected with a first screw plug 19, and the first screw plug 19 is matched with the threaded hole 3.

[0036] In this embodiment, when the inner cavity of the shell 1 is not cleaned, the first screw plug 19 is installed on the threaded hole 3 to seal it.

[0037] Working principle: when in use, the pressure relief device is installed on the transformer through the threaded pipe 2, when the pressure inside the transformer increases, the high pressure will push the telescopic column 23 and the piston plate 24 to move upwards against the elastic force of the spring 22, at this time, the high pressure gas in the transformer will enter the shell 1 from the threaded pipe 2, and the gas in the shell 1 will be discharged from the serpentine heat exchange copper pipe 7, in addition, the gas flowing in the serpentine heat exchange copper pipe 7 exchanges heat with the water in the inner cavity of the cooling box 6, thereby cooling the gas in the serpentine heat exchange copper pipe 7, the oil liquid carried by the gas condenses and becomes liquid drops again, and the liquid drops move downwards under the action of gravity, so that the oil drops are collected from the liquid collecting screw pipe 8 into the liquid collecting screw cap 9, and the liquid collecting screw cap 9 is removed at a fixed time to clean the oil liquid collected therein.

[0038] When the inner cavity of the shell 1 needs to be cleaned, the first screw plug 19 is unscrewed from the threaded hole 3, the water tank 10 is transported to the transformer, the end of the water guide pipe 13 is inserted into the inner cavity of the shell 1 from the threaded hole 3, the electric heating rod 11 is powered on to heat the cleaning water in the water tank 10, the water pump 12 is started to guide the hot water in the water tank 10 into the inner cavity of the shell 1 from the water guide pipe 13, and the hot water in the inner cavity of the shell 1 is used to clean the oil liquid adhered to the inner wall of the shell 1, and the oil liquid on the side surface of the square pipe 21, the telescopic column 23 and the piston plate 24 is cleaned, in addition, the hot water will enter the serpentine heat exchange copper pipe 7, thereby cleaning the oil liquid on the inner wall of the serpentine heat exchange copper pipe 7, the cleaning water flows out from the end of the serpentine heat exchange copper pipe 7, and finally the first switch valve 20 is opened to discharge the cleaning water at the bottom of the inner cavity of the shell 1.

[0039] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A pressure relief device for oil-immersed transformers, comprising a housing (1), characterized in that: The bottom of the shell (1) is provided with a threaded pipe (2), the inner cavity of the shell (1) is provided with a pressure release mechanism (5), the top surface of the shell (1) is provided with a threaded hole (3), the side of the shell (1) is provided with a cleaning mechanism (4), the side of the shell (1) is fixedly connected with a cooling box (6), the side of the shell (1) is fixedly sleeved with a serpentine heat exchange copper pipe (7), the end of the serpentine heat exchange copper pipe (7) penetrates the inner cavity of the cooling box (6) and extends to the outside of the cooling box (6), the bottom end of the serpentine heat exchange copper pipe (7) is provided with a liquid collecting screw pipe (8), the bottom end of the liquid collecting screw pipe (8) is fixedly sleeved to the bottom of the cooling box (6) and is screw-mounted with a liquid collecting screw cover (9), the outside of the bottom end of the shell (1) is fixedly mounted with a first switch valve (20), and the end of the first switch valve (20) extends to the bottom of the inner cavity of the shell (1).

2. A pressure relief device for an oil immersed transformer according to claim 1, characterized in that: The cleaning mechanism (4) comprises a water tank (10) arranged outside the shell (1), the inner cavity of the water tank (10) is fixedly mounted with an electric heating rod (11), the top surface of the water tank (10) is fixedly mounted with a water pump (12), both ends of the water pump (12) are fixedly connected with water guide pipes (13), one end of the water guide pipe (13) extends to the inner cavity of the water tank (10), and the other end of the water guide pipe (13) extends to the inner cavity of the shell (1) through the threaded hole (3), the top surface of the water tank (10) is fixedly mounted with a control panel (15), and the side of the water tank (10) is provided with a storage battery (16).

3. A pressure relief device for an oil immersed transformer according to claim 1, characterized in that: The pressure release mechanism (5) comprises a square pipe (21) and a spring (22) fixedly connected to the top of the inner cavity of the shell (1), the spring (22) is located on the inner side of the square pipe (21), the bottom end of the spring (22) is fixedly connected with a telescopic column (23), the bottom end of the telescopic column (23) extends to the inner cavity of the shell (1) and is fixedly connected with a piston plate (24), the bottom surface of the piston plate (24) is attached to the bottom surface of the inner cavity of the shell (1), the piston plate (24) is located directly above the threaded pipe (2), and the side of the telescopic column (23) is attached to the inner wall of the square pipe (21).

4. A pressure relief device for an oil immersed transformer according to claim 1, characterized in that: The top surface of the cooling box (6) is screw-mounted with a second screw plug (25), and the side of the cooling box (6) is fixedly mounted with a second switch valve (26).

5. A pressure relief device for an oil immersed transformer according to claim 2, characterized in that: The top surface of the water tank (10) is screw-mounted with a third screw plug (17), and the top surface of the water tank (10) is fixedly mounted with a handle (14).

6. A pressure relief device for an oil immersed transformer according to claim 1, characterized in that: The side of the shell (1) is fixedly connected with a connecting rope (18), the end of the connecting rope (18) is fixedly connected with a first screw plug (19), and the first screw plug (19) is matched with the threaded hole (3).

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