New double float gas relay device

Abstract

The invention discloses a novel double-float gas relay device, comprising a gas relay body, wherein an upper cover plate is arranged on the top of the gas relay body, and two groups of probes and air vent plugs are arranged on the upper cover plate, and the bottoms of the probes and the air vent plugs are embedded in the upper cover plate and extend into the internal cavity of the gas relay body; junction boxes are arranged on the left and right sides of the gas relay body, and the two groups of junction boxes are respectively located above the pipelines of the oil inlet and the oil outlet; a plurality of wiring posts are evenly distributed on the inner bottom surface of the junction box, and wiring holes are arranged on the front and rear sides of the junction box; two groups of observation windows are symmetrically arranged on the front and rear sides of the gas relay body from top to bottom, and the two groups of observation windows are respectively a light gas observation window and a heavy gas observation window; an oil level observation component is arranged inside the observation window; the device has the advantages of being rainproof, condensation-proof, moisture-proof, preventing DC grounding, and being easy to observe.

Description

Technical Field

[0001] The invention relates to the technical field of transformer protection equipment, in particular to a new double-float gas relay device. Background Art

[0002] The double-float gas relay is an indispensable protection device in the substation. It is located in the pipeline between the oil pillow and the oil tank of the transformer. It responds to faults such as gas generated by equipment failure, loss of insulating oil, and accelerated circulation caused by sudden expansion of insulating oil, and links emergency measures.

[0003] The existing double-float gas relay junction box is arranged under the top cover, with the terminal and the oil flow direction perpendicular, and the cover is sealed by a sealing gasket. However, with the years of operation, environmental impact and aging of the sealing gasket, it is easy for snow to accumulate and water to seep around the cover in icy, snowy and rainy weather, causing internal moisture and condensation, leading to DC grounding faults and even causing the main transformer circuit breaker to trip. In addition, the oil level observation window uses transparent plexiglass. Although the pressure resistance of the observation window is improved, because the transformer oil is colorless, it is difficult for the inspectors to distinguish whether the gas relay is fully filled with oil or insufficient oil through the observation window, which can easily cause the inspectors to misjudge and cause the transformer to lose the protection of the gas relay, affecting the safe and stable operation of the power grid and causing major safety hazards.

[0004] Therefore, according to the deficiencies in the above-mentioned technology, it is necessary to propose a new type of double-float gas relay that is rainproof, condensation-proof, moisture-proof, and prevents DC grounding and is easy to observe. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing gas relay is prone to ice, snow and rainwater seeping into the interior of the device due to the aging problem of the sealing gasket, causing the device to become damp and produce condensation and erroneous signal transmission; and because the transformer oil is transparent and colorless, it is difficult for inspectors to observe the oil level changes through the observation window, which is easy to cause inspectors to misjudge and affect the safe operation of the power grid. A new double-float gas relay device is disclosed, which has the advantages of rainproof, condensation-proof, moisture-proof, and DC grounding-proof and easy to observe.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a new double-float gas relay device, comprising a gas relay body, wherein an oil inlet and an oil outlet are respectively arranged on the left and right sides of the lower side of the gas relay body, and the oil inlet and the oil outlet are both communicated with the internal cavity of the gas relay body, an upper cover plate is arranged on the top of the gas relay body, and two groups of probes and a vent plug are arranged on the upper cover plate, and the bottoms of the probes and the vent plug are both embedded in the upper cover plate and extend into the internal cavity of the gas relay body;

[0007] The left and right sides of the gas relay body are both provided with junction boxes, and the two sets of junction boxes are respectively located above the pipelines of the oil inlet and the oil outlet;

[0008] A plurality of wiring posts are evenly distributed on the inner bottom surface of the junction box, and wiring holes are provided on the front and rear sides of the junction box;

[0009] The front and rear sides of the gas relay body are symmetrically provided with two groups of observation windows from top to bottom, the two groups of observation windows are light gas observation windows and heavy gas observation windows respectively;

[0010] An oil level observation component is arranged inside the observation window.

[0011] Preferably, the oil level observation assembly comprises a concave lens, a sealing body, a pressure cover and a reflective plate, wherein the concave lens is pressed into the mounting groove inside the observation window by the sealing body and the pressure cover gripping edge and is fixed to the inner bottom surface of the mounting groove by a fastening screw;

[0012] The reflector is located on one side of the concave lens and is fixed at a corresponding position inside the observation window by screws.

[0013] Preferably, the terminal blocks are in ten groups, including two pairs of light gas signals, two pairs of heavy gas signals, two pairs of oil shortage alarm signals and four pairs of spare signals.

[0014] Preferably, the outer periphery of the junction box is covered with a rain cover, and the upper and lower sides of the rain cover are fixed to the outer surface of the junction box by screws;

[0015] The rain cover is a transparent rain cover.

[0016] Preferably, the wiring hole is designed to be tilted downward at an angle of 45 degrees.

[0017] Preferably, the gland and the sealing body are both annular structures;

[0018] The gland is made of stainless steel;

[0019] The sealing body is an insulating sealing pad.

[0020] Preferably, the reflector is a red circular plate-shaped structure, and the surface of the reflector is coated with a fluorescent material.

[0021] Compared with the prior art, the invention has the following beneficial effects: the new double-float gas relay device, by designing the traditional top horizontal junction box as a vertical junction box on the side of the equipment, avoids major hidden dangers such as false alarm of fault signals and even circuit breaker tripping caused by moisture condensation inside the junction box, ensures the safe operation of the equipment, reduces the number of power outages and load losses, and improves the reliability of power supply;

[0022] Through the improved design of the traditional oil level observation component, based on the principle of optical refraction, using a prismatic reflective concave lens, and taking advantage of the different refractive indices of air, organic glass and transformer oil, the optical principle is used to improve the visibility of the oil level, solving the problem of difficulty in distinguishing whether the gas relay is fully filled with oil or insufficient oil due to the transparent and colorless transformer oil.

[0023] By coating the surface of the reflector with fluorescent material, the oil level can be easily observed at night or in dim light. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is the front view of the present invention;

[0026] Figure 3 It is a side view of the present invention;

[0027] Figure 4 A top view of the present invention;

[0028] Figure 5 It is a side view of the oil level observation assembly of the present invention.

[0029] In the figure: 1. Buchholz relay body; 2. Oil inlet; 3. Oil outlet;

[0030] 11. Upper cover; 12. Junction box; 13. Observation window; 14. Vent plug; 15. Probe; 16. Rain cover;

[0031] 121, terminal; 122, wiring hole;

[0032] 131. concave lens; 132. sealing body; 133. gland; 134. fastening screw; 135. reflecting plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-5The present invention provides a technical solution: a new double-float gas relay device, comprising a gas relay body 1, wherein an oil inlet 2 and an oil outlet 3 are respectively arranged on the left and right sides of the lower side of the gas relay body 1, wherein the oil inlet 2 and the oil outlet 3 are both communicated with the internal cavity of the gas relay body 1, and an upper cover plate 11 is arranged on the top of the gas relay body 1, and two groups of probes 15 and a venting plug 14 are arranged on the upper cover plate 11, wherein the bottoms of the probes 15 and the venting plug 14 are both embedded in the upper cover plate 11 and extend into the internal cavity of the gas relay body 1; wherein the internal cavity of the gas relay body 1 is flushed with transformer oil through the oil inlet 2;

[0035] The left and right sides of the gas relay body 1 are both provided with junction boxes 12, and the two sets of junction boxes 12 are respectively located above the pipelines of the oil inlet 2 and the oil outlet 3;

[0036] A plurality of terminal posts 121 are evenly distributed on the inner bottom surface of the junction box 12, and wiring holes 122 are provided on the front and rear sides of the junction box 12;

[0037] The front and rear sides of the gas relay body 1 are symmetrically provided with two groups of observation windows 13 from top to bottom, the two groups of observation windows 13 are light gas observation windows and heavy gas observation windows, wherein the light gas observation window is located above the heavy gas observation window;

[0038] The observation windows 13 are each provided with an oil level observation assembly.

[0039] See also Figure 5 The oil level observation assembly includes a concave lens 131, a sealing body 132, a pressure cover 133 and a reflector 135. The concave lens 131 is pressed into the mounting groove inside the observation window 13 by the sealing body 132 and the pressure cover 133 and is fixed to the inner bottom surface of the mounting groove by a fastening screw 134.

[0040] In this embodiment, a prism (not shown) is further provided inside the concave lens 131. The concave lens is reflected by the prism. With the help of the different refractive indices of air, organic glass and transformer oil, the visibility of the oil level is improved by optical principles. The red reflector is eye-catching and easy to observe.

[0041] The reflector 135 is located at one side of the concave lens 131 and is fixed to a corresponding position inside the observation window 13 by screws (not shown in the figure).

[0042] See also Figure 1 The terminal posts 121 are each in ten groups, including two pairs of light gas signals, two pairs of heavy gas signals, two pairs of oil shortage alarm signals and four pairs of spare signals.

[0043] See also Figure 1The outer periphery of the junction box 12 is provided with a rain cover 16, and the upper and lower sides of the rain cover 16 are fixed to the outer surface of the junction box 12 by screws;

[0044] In this embodiment, the rain cover 16 is a transparent rain cover, which is convenient for observing the wiring conditions inside the junction box 12, and prevents rainwater from entering the inside of the junction box 12, and snow is not easy to adhere.

[0045] See also Figure 1 The wiring hole 122 is designed to be tilted downward at a 45-degree angle; the wire tube installed at the wiring hole is tilted downward at a 45-degree angle to prevent external rainwater from entering the interior of the junction box 12 through the wire tube port, so that the internal wiring is always kept dry.

[0046] See also Figure 5 The gland 133 and the sealing body 132 are both annular structures; the gland 133 is made of stainless steel, and the sealing body 132 is made of insulating gasket to prevent transformer oil leakage.

[0047] See also Figure 5 The reflector 135 is a red circular plate-shaped structure, and the surface of the reflector 135 is coated with a fluorescent material, which is convenient for observing the oil level at night or in dim light.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of double-float gas relay device, comprising a gas relay body, wherein an oil inlet and an oil outlet are respectively arranged on the left and right sides below the gas relay body, and the oil inlet and the oil outlet are both connected to the internal cavity of the gas relay body, and the characteristics are: An upper cover is provided on the top of the gas relay body, and two sets of probes and a vent plug are provided on the upper cover. The bottoms of the probes and the vent plug are embedded in the upper cover and extend into the internal cavity of the gas relay body. The left and right sides of the gas relay body are both provided with junction boxes, and the two sets of junction boxes are respectively located above the pipelines of the oil inlet and the oil outlet; A plurality of wiring posts are evenly distributed on the inner bottom surface of the junction box, and wiring holes are provided on the front and rear sides of the junction box; The front and rear sides of the gas relay body are symmetrically provided with two groups of observation windows from top to bottom, the two groups of observation windows are light gas observation windows and heavy gas observation windows respectively; The inside of each observation window is provided with an oil level observation component; The oil level observation assembly comprises a concave lens, a sealing body, a pressure cover and a reflective plate. The concave lens is pressed into the mounting groove inside the observation window by the sealing body and the pressure cover gripping edge and is fixed to the inner bottom surface of the mounting groove by fastening screws; the reflective plate is located on one side of the concave lens and is fixed to the corresponding position inside the observation window by screws; The terminal blocks are in groups of ten, including two pairs of light gas signals, two pairs of heavy gas signals, two pairs of oil shortage alarm signals and four pairs of spare signals; the outer periphery of the terminal box is covered with a rain cover, and the upper and lower sides of the rain cover are fixed to the outer surface of the terminal box by screws; The rain cover is a transparent rain cover; the wiring hole is designed to be tilted downward at a 45-degree angle.

2. The novel double-float gas relay device according to claim 1 is characterized in that: The gland and the sealing body are both annular structures; The gland is made of stainless steel; The sealing body is an insulating sealing pad.

3. The novel double-float gas relay device according to claim 1 is characterized in that: The reflector is a red circular plate-shaped structure, and the surface of the reflector is coated with fluorescent material.

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