Transformer oil static eliminator

Abstract

The utility model discloses a transformer oil electrostatic elimination device, the utility model relates to transformer oil purification auxiliary equipment technical field, the utility model discloses, including: the pipe shell, both ends fixedly connected with the flange of pipe shell, the pipe shell is fixedly connected with external component through the flange, through setting the cooperation of each component, relying on the principle of self -induction, need not external power supply and operation, reduce operation and maintenance cost, adapt to unattended scene, and the flange of pipe shell both ends can directly butt -joint external pipeline, and the installation is convenient and the compatibility is strong, and the design of the both ends wide insulation layer, middle thin section can strengthen the ground capacitance reduction effect of core area, improve voltage and abnormal strong electric field intensity, lay the foundation for electricity, and the input end drainage line circumferential array arrangement, guide oil flow even distribution, avoid the influence of electric field stability of partial flow, and the wave point structure of insulation layer middle thin section can actively enhance the turbulence of oil flow, and the purpose of accelerating the mixing of reverse polarity charge and oil charge.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for transformer oil purification, specifically a device for eliminating static electricity in transformer oil. Background Technology

[0002] This utility model relates to the technical field of auxiliary equipment for transformer oil purification, specifically a transformer oil static elimination device adapted to the YNJSC2000ZX online live-line dielectric loss reduction oil filter. It is used to eliminate static electricity generated by flow friction in transformer oil during the oil filter process, ensuring the safety of the oil purification process and the stability of the oil quality.

[0003] In the online regeneration and purification of transformer oil, some devices require external power supply, resulting in poor compatibility with the online energized operation of the oil filter. This also increases energy consumption and the risk of circuit failure. For an oil flow rate of 2000L / h, oil flow deviation and insufficient turbulence intensity are prone to occur, leading to uneven injection of reverse polarity charges and incomplete discharge. If too much static electricity accumulates, it may cause oil flow breakdown, partial discharge, or even ignite trace gases in the oil, threatening the safe operation of the oil filter and transformer. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a transformer oil static eliminator, which solves the problems of not requiring external power supply and manual operation, avoiding uneven static elimination, poor installation compatibility, and loose components, thus ensuring stable and efficient static elimination.

[0005] (II) Technical Solution To solve the above problems, this utility model achieves the following technical solution: a transformer oil static elimination device, comprising: a shell, flanges fixedly connected to both ends of the shell, the shell being fixedly connected to external components through the flanges, a dielectric tube fixedly connected to the inner wall of the shell, and an insulating layer fixedly connected to the inner wall of the dielectric tube. The insulating layer is wide at both ends and narrow in the middle. By adjusting the capacitance to ground through the insulating layer, the metal shell induces reverse polarity charges. The entire process requires no external power supply or manual operation, thus avoiding the risk of circuit failures that may be introduced by an external power supply and reducing equipment maintenance costs.

[0006] Preferably, the input end of the insulating layer is fixedly connected to a guide wire, and the outer wall of the guide wire is arranged in a circumferential array along the central axis of the insulating layer. The guide wire can also pre-sort the direction of the oil flow, reduce the degree of turbulence when the oil flow enters the core area, lay the foundation for the formation of stable turbulence by subsequent wave point disturbances, and further improve the stability of the power dissipation process.

[0007] Preferably, the inner wall of the insulating layer is fixedly connected with polka dots, and the outer wall of the polka dots is arranged in a circumferential array along the central axis of the insulating layer. The polka dots are only set in the middle section of the insulating layer, and their raised structure can actively disturb the oil flow: when the transformer oil flows through this area, the polka dots break the laminar boundary layer of the oil flow, forcibly forming a more intense and uniform turbulence.

[0008] Preferably, the polka dots are fixedly connected to the thinner region in the middle of the insulating layer.

[0009] Preferably, a rubber stopper is fixedly connected to the inner wall of the tube shell, dielectric tube, and insulating layer. A base current discharge needle is fixedly connected to the inner wall of the rubber stopper. The rubber stopper is triple-fixed to firmly position the base current discharge needle, preventing the discharge needle from shifting or shaking due to the impact of oil turbulence, and ensuring that the needle tip is always in the core area of ​​the strong electric field.

[0010] Preferably, the outer walls of the rubber plug and the base current discharge needle are arranged in a circumferential array along the central axis of the tube shell.

[0011] Beneficial effects This invention provides a device for eliminating static electricity in transformer oil. It has the following beneficial effects: This utility model, through the coordinated design of its components and relying on the principle of self-induction, eliminates the need for external power supply and operation, reducing maintenance costs and making it suitable for unattended scenarios. The flanges at both ends of the tube shell can be directly connected to external pipelines, making installation convenient and highly compatible. The insulation layer, with its wide ends and narrow middle design, enhances the reduction of capacitance to ground in the core area, improves voltage and the strength of abnormal strong electric fields, laying the foundation for current dissipation. The input end has a circumferential array of lead wires, with 15 current-collecting discharge needles covering the entire tube cross-section. This, combined with the lead wires guiding the oil flow to a uniform distribution and the enhanced turbulence through wave points, ensures that opposite polarity charges are fully mixed with the oil flow, meeting the requirements for safe transformer oil transportation. Attached Figure Description

[0012] Figure 1 This is a flowchart illustrating the present invention. Figure 2 This is a schematic diagram of the safety device of this utility model; Figure 3 This is a schematic diagram of the filtration process of this utility model; Figure 4 This utility model Figure 2 A schematic diagram of the structure of the mid-spot elimination device; Figure 5 This utility model Figure 4 A schematic diagram of the cross-sectional structure; Figure 6 This utility model Figure 5 An enlarged schematic diagram of the structure at point A in the middle.

[0013] In the diagram: 1. Tube shell; 2. Dielectric tube; 3. Insulating layer; 4. Drain wire; 5. Dotted line; 6. Rubber stopper; 7. Base current discharge needle; 8. Flange. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example Please see Figure 1-6 This utility model provides a technical solution: a transformer oil static electricity elimination device, comprising: The tube shell 1 has flanges 8 fixedly connected to both ends. The tube shell 1 is fixedly connected to external components through the flanges 8. The inner wall of the tube shell 1 is fixedly connected to a dielectric tube 2. When the transformer oil needs to be statically eliminated during use, it is eliminated through the tube shell 1, the dielectric tube 2 and the insulating layer 3. First, transformer oil enters the equipment via safety devices, an inlet interchange valve, and an inlet valve. It first flows through a coarse filter via a switching valve, then through a solenoid valve into a heater. After heating, the oil enters a two-stage vacuum separation chamber, where it is atomized by an atomizer, forming an oil film in the two-stage separation tower. Under high vacuum, water vapor and gas vaporize. The gas is discharged through a Roots pump / vacuum pump and a condenser. The clean oil flows back to the transformer via an outlet pump, a check valve, a first-stage precision filter, and then through an interchange valve and an outlet valve. An adsorption filter step is added before the coarse filter, using a composite adsorbent to treat the oil. The subsequent process is the same as dehydration and degassing. Gas is introduced into the adsorption tank through the inlet via a switching valve, and then into the oil-gas separator tank via another switching valve. The exhaust gas passes sequentially through a condenser, an exhaust gas spray tower, a vacuum blower, and an activated carbon exhaust gas treatment box before being discharged. Safety is ensured throughout the process by electrostatic elimination devices, leak prevention devices, and emergency start / stop / exhaust devices. The transformer can also be evacuated via a vacuum port. An insulating layer 3 is fixedly connected to the inner wall of the dielectric tube 2. The insulating layer 3 is wide at both ends and narrow in the middle. A guide line 4 is fixedly connected to the input end of the insulating layer 3. The outer wall of the guide line 4 is arranged in a circular array along the central axis of the insulating layer 3. A dot 5 is fixedly connected to the inner wall of the insulating layer 3. The outer wall of the dot 5 is arranged in a circular array along the central axis of the insulating layer 3. The dot 5 is fixedly connected to the narrow area in the middle of the insulating layer 3. In this case, it is an electrostatic eliminator in a safety device. The device is connected to the external oil pipeline through the flanges 8 at both ends of the tube shell 1 to ensure that the oil flow enters the device stably. When the live transformer oil first flows through the input end of the insulating layer 3, the circumferentially arranged guide line 4 will guide the oil flow to be evenly distributed along the central axis of the tube shell 1, avoiding the oil flow from deviating due to the inlet shape deviation, and ensuring that the flow rate and charge distribution remain uniform when the oil flow enters the core electrostatic elimination area. The narrow section in the middle can effectively reduce the capacitance to ground of the oil flow. Combined with the insulation properties of the insulating layer 3 itself, the voltage of the oil flow in this area increases significantly, thereby forming a distorted strong electric field area on the inner wall of the dielectric tube 2. The wide sections at both ends of the insulating layer 3 can smooth the electric field gradient at the oil flow inlet and outlet, preventing the neutralized charge from separating again due to the sudden change in electric field when the oil flow enters or is about to flow out of the device, thus ensuring the continuous discharge process. Since the tube shell 1 is a grounded metal shell, under the action of the strong electric field, the tube shell 1 will induce charges with opposite polarity to the charges inside the oil flow through electrostatic induction. These opposite polarity charges will be conducted along the dielectric tube 2 and eventually accumulate on the base current discharge needle 7 fixed by the rubber plug 6. The rubber plug 6 connects the tube shell 1, the dielectric tube 2 and the inner wall of the insulating layer 3, which can firmly fix the position of the base current discharge needle 7, ensuring that the discharge needle is always in the core area of ​​the strong electric field, avoiding the displacement of the discharge needle due to the impact of the oil flow, and ensuring the stable accumulation of opposite polarity charges. A rubber stopper 6 is fixedly connected to the inner wall of the casing 1, dielectric tube 2, and insulating layer 3. A base current discharge needle 7 is fixedly connected to the inner wall of the rubber stopper 6. The outer walls of the rubber stopper 6 and the base current discharge needle 7 are arranged in a circumferential array along the central axis of the casing 1. When the oil flow passes through the area of ​​the wave point 5 in the middle section of the insulating layer 3, the wave point 5 in the circumferential array will actively disturb the oil flow, break the laminar boundary layer of the oil flow, and promote the formation of uniform and intense turbulence. Under the combined action of high potential, strong electric field and turbulence, the opposite polarity charge accumulated on the base current discharge needle 7 will be injected into the oil flow through the needle tip, and fully contact and collide with the charged particles inside the oil flow to achieve charge neutralization, thereby eliminating static electricity in the oil flow. The transformer oil that has completed the static electricity elimination flows along the internal channel of the device and finally flows back to the external oil transportation system through the flange 8 at the outlet end. The entire static electricity elimination process is completed by relying on the device's own structure and self-induction principle, without the need for additional energy input or operational intervention.

[0016] When the transformer oil needs to be destaticated during use, it is done through the shell 1, dielectric tube 2, and insulating layer 3. First, transformer oil enters the equipment via safety devices, an inlet interchange valve, and an inlet valve. It first flows through a coarse filter via a switching valve, then through a solenoid valve into a heater. After heating, the oil enters a two-stage vacuum separation chamber, where it is atomized by an atomizer, forming an oil film in the two-stage separation tower. Under high vacuum, water vapor and gas vaporize. The gas is discharged through a Roots pump / vacuum pump and a condenser. The clean oil flows back to the transformer via an outlet pump, a check valve, a first-stage precision filter, and then through an interchange valve and an outlet valve. An adsorption filter step is added before the coarse filter, using a composite adsorbent to treat the oil. The subsequent process is the same as dehydration and degassing. Gas is introduced into the adsorption tank through the inlet via a switching valve, and then into the oil-gas separator tank via another switching valve. The exhaust gas passes sequentially through a condenser, an exhaust gas spray tower, a vacuum blower, and an activated carbon exhaust gas treatment box before being discharged. Safety is ensured throughout the process by electrostatic elimination devices, leak prevention devices, and emergency start / stop / exhaust devices. The transformer can also be evacuated via a vacuum port. This case is an electrostatic eliminator in a safety device. The device is connected to an external oil pipeline through flanges 8 at both ends of the shell 1 to ensure that the oil flow enters the device stably. When the live transformer oil first flows through the input end of the insulation layer 3, the circumferentially arranged guide lines 4 will guide the oil flow to be evenly distributed along the central axis of the shell 1, avoiding the oil flow from deviating due to the inlet shape deviation, and ensuring that the flow rate and charge distribution remain uniform when the oil flow subsequently enters the core electrostatic elimination area. The narrow section in the middle can effectively reduce the capacitance to ground of the oil flow. Combined with the insulation properties of the insulating layer 3 itself, the voltage of the oil flow in this area increases significantly, thereby forming a distorted strong electric field area on the inner wall of the dielectric tube 2. The wide sections at both ends of the insulating layer 3 can smooth the electric field gradient at the oil flow inlet and outlet, preventing the neutralized charge from separating again due to the sudden change in electric field when the oil flow enters or is about to flow out of the device, thus ensuring the continuous discharge process. Since the tube shell 1 is a grounded metal shell, under the action of the strong electric field, the tube shell 1 will induce charges with opposite polarity to the charges inside the oil flow through electrostatic induction. These opposite polarity charges will be conducted along the dielectric tube 2 and eventually accumulate on the base current discharge needle 7 fixed by the rubber plug 6. The rubber plug 6 connects the tube shell 1, the dielectric tube 2 and the inner wall of the insulating layer 3, which can firmly fix the position of the base current discharge needle 7, ensuring that the discharge needle is always in the core area of ​​the strong electric field, avoiding the displacement of the discharge needle due to the impact of the oil flow, and ensuring the stable accumulation of opposite polarity charges. When the oil flows through the dotted area 5 in the middle section of the insulating layer 3, the dotted area 5 of the circular array actively disturbs the oil flow, breaking the laminar boundary layer of the oil flow and causing the oil flow to form uniform and intense turbulence. Under the combined action of high potential, strong electric field and turbulence, the opposite polarity charge accumulated on the base current discharge needle 7 will be injected into the oil flow through the needle tip, fully contacting and colliding with the charged particles inside the oil flow to achieve charge neutralization, thereby eliminating static electricity in the oil flow. The transformer oil that has completed static electricity elimination then flows along the internal channel of the device and finally flows back to the external oil transportation system through the flange 8 at the outlet end. The entire static electricity elimination process is completed by relying on the device's own structure and self-induction principle, without the need for additional energy input or operational intervention.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transformer oil static eliminator, comprising: The shell (1) is characterized by: Flanges (8) are fixedly connected to both ends of the shell (1). The shell (1) is fixedly connected to external components through the flanges (8). A dielectric tube (2) is fixedly connected to the inner wall of the shell (1). An insulating layer (3) is fixedly connected to the inner wall of the dielectric tube (2). The insulating layer (3) is wide at both ends and narrow in the middle.

2. The transformer oil static electricity elimination device according to claim 1, characterized in that: The input end of the insulating layer (3) is fixedly connected to a guide wire (4), and the outer wall of the guide wire (4) is arranged in a circular array along the central axis of the insulating layer (3).

3. The transformer oil static electricity elimination device according to claim 1, characterized in that: The inner wall of the insulating layer (3) is fixedly connected with polka dots (5), and the outer wall of the polka dots (5) is arranged in a circular array along the central axis of the insulating layer (3).

4. The transformer oil static electricity elimination device according to claim 3, characterized in that: The polka dot (5) is fixedly connected to the thin area in the middle of the insulating layer (3).

5. The transformer oil static electricity elimination device according to claim 1, characterized in that: A rubber plug (6) is fixedly connected to the inner wall of the casing (1), dielectric tube (2) and insulating layer (3), and a base current discharge needle (7) is fixedly connected to the inner wall of the rubber plug (6).

6. The transformer oil static electricity elimination device according to claim 5, characterized in that: The outer walls of the rubber plug (6) and the base current discharge needle (7) are arranged in a circumferential array along the central axis of the tube shell (1), and the number of the base current discharge needle (7) is 15.

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