A transformer vacuum oiling device

Abstract

This utility model relates to the field of transformer technology and discloses a transformer vacuum oil injection device, comprising: a tank, an oil pump fixedly installed at the bottom of the outer wall of the tank, a hose fixedly installed at the outlet end of the oil pump, and an oil injection gun, the inlet end of the oil injection gun being fixedly connected to the end of the hose away from the oil pump. This transformer vacuum oil injection device has the following advantages: through the coordinated operation of various components, the conical cylinder and the stirring roller rotate synchronously. The rotating stirring roller can stir the oil inside the tank. After the oil self-circulation and stirring are completed, the outlet end of the oil injection gun is connected to the interface of the transformer to be injected, and the oil injection operation can be carried out. The stirring roller can be automatically driven by the potential energy of the oil flow, eliminating the need for an additional stirring motor, thus achieving uniform oil mixing and preventing oil stratification, effectively reducing equipment manufacturing costs.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a transformer vacuum oil injection device. Background Technology

[0002] Vacuum oil injection is an effective process for improving the insulation strength of transformers. As a key electrical device in power plants and substations, the insulation strength of transformers directly affects their safe and stable operation. Generally, there are two methods for oil injection after a transformer arrives on site: direct oil injection and vacuum oil injection. Transformers with voltage levels of 110kV and above normally use vacuum oil injection, which can significantly reduce the oil-water content, thereby enhancing the breakdown strength of the transformer oil and reducing the oil gap distance in the transformer body insulation. However, existing transformer bushing vacuum oil injection devices sometimes experience oil stratification when left to stand, resulting in different oil concentrations and affecting the transformer's service life, causing certain adverse effects on users.

[0003] To address the aforementioned drawbacks, the utility model patent with authorization announcement number CN215299022U was applied in the disclosed technology. Although it can prevent the oil from separating into upper and lower layers when standing, the stirring motor drives the stirring roller to rotate, which can keep the oil concentration uniform when injected into the transformer. By continuously stirring to maintain the homogeneity of the transformer oil components, it can ensure that the breakdown strength, water content and impurity distribution of the injected oil are consistent, avoid the formation of local weak insulation areas, thereby improving the reliability of the insulation system and extending the operational stability of the equipment throughout its entire life cycle.

[0004] However, the device still has some drawbacks in actual use: to avoid the oil in the tank from separating and to ensure that the oil is injected into the transformer at a uniform concentration, the stirring motor at the top of the device must be started. It cannot rely on the potential energy generated by the discharge of the oil inside the device to drive the stirring roller to rotate. The overall manufacturing cost of the equipment is too high and it is not convenient to promote its use. Utility Model Content

[0005] The purpose of this invention is to provide a transformer vacuum oil injection device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a transformer vacuum oil injection device, comprising: a tank, an oil pump fixedly installed at the bottom of the outer wall of the tank, a hose fixedly installed at the outlet end of the oil pump, an oil injection gun fixedly connected at the inlet end of the oil injection gun to the end of the hose away from the oil pump, a horizontal pipe fixedly installed at the inlet end of the oil pump and penetrating one side of the outer wall of the tank, a vertical cylinder fixedly connected to the end of the horizontal pipe away from the oil pump and communicating with the interior of the horizontal pipe, a base fixedly connected to the bottom end of the vertical cylinder and fixedly connected to the bottom interior of the tank, a conical cylinder rotatably connected to the top end of the vertical cylinder, multiple blades arranged in a ring and equidistantly fixed on the inner wall of the conical cylinder, and multiple stirring rollers arranged in a ring and equidistantly fixed on the outer wall of the conical cylinder.

[0007] Optionally, it further includes: an impeller located inside and above the vertical cylinder; a vertical rod fixed to the top of the impeller; and two support rods, each fixed to one side of the outer wall of the vertical rod, with the ends of the support rods away from the vertical rod fixedly connected to the vertical cylinder.

[0008] Optionally, it also includes: a slot block, which is snapped onto the outer wall of the oil gun handle and is fixedly connected to the tank.

[0009] Optionally, it further includes: a can lid, which is fixedly installed on the top of the can body; a safety valve, which is fixedly installed on the top of the can lid; and an oil filling port, which is fixedly installed on one side of the top of the outer wall of the can body.

[0010] Optionally, it also includes: a pagoda head, which is fixedly installed at the outlet end of the oil injection gun; a one-way valve, which is fixedly installed on the other side of the top of the outer wall of the tank; and a rubber tube, which is fixedly connected to the inlet end of the one-way valve.

[0011] Optionally, it further includes: an observation window, which is embedded and fixed to the outer wall of the tank; and a scale, wherein two sets of scales are arranged vertically, and the two sets of scales are respectively arranged on both sides of the observation window, and the scales are arranged on the outer wall of the tank.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This transformer vacuum oil injection device has the following advantages: Through the coordinated operation of various components, when the operator injects oil from the tank into the transformer, the oil outlet of the oil injection gun must first be placed in the appropriate container, the oil pump is started, and the oil injection gun lever is pulled. At this time, the horizontal pipe generates suction, creating a negative pressure inside the vertical cylinder. The oil inside the tank quickly flows into the conical cylinder and the vertical cylinder, and then passes through the horizontal pipe, the oil pump, and the hose in sequence, finally being discharged from the oil injection gun. During this process, the flowing oil impacts the blades on the inner wall of the conical cylinder. Through the transmission action of the blades, the conical cylinder and the stirring roller rotate synchronously. The rotating stirring roller can stir the oil inside the tank, effectively preventing oil stratification. After the oil self-circulation and stirring are completed, the outlet of the oil injection gun is connected to the interface of the transformer to be injected, and the oil injection operation can be carried out. The stirring roller can be automatically driven by the potential energy of the oil flow, without the need for an additional stirring motor, which can achieve uniform mixing of oil and eliminate the problem of oil stratification, effectively reducing the equipment manufacturing cost and having good promotion and application value.

[0013] To simplify the oil transfer process, operators can insert the pagoda head, which is fixed to the outlet of the oil injection gun, into the rubber hose, then start the oil pump and pull the oil injection gun wrench. During the process of circulating and stirring the oil inside the tank, the discharged oil can flow directly back into the tank without the need for external containers to assist in oil storage or subsequent manual transfer of oil, greatly improving the convenience of the operation.

[0014] In addition, as the oil flows from the vertical cylinder into the horizontal pipe, it simultaneously impacts the impeller, causing the impeller to generate rotational kinetic energy due to the fluid impact. This further enhances the rotational force of the conical cylinder, allowing the stirring roller to more fully and evenly mix the oil inside the tank, improving the oil mixing effect. At the same time, the observation window and scale on the outer wall of the tank allow operators to visually check the remaining oil level inside the tank, facilitating timely replenishment of oil and ensuring continuous operation. Attached Figure Description

[0015] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A partial sectional view of the side view in the middle; Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0017] In the diagram: 1. Tank body, 2. Oil pump, 3. Hose, 4. Oil injection gun, 5. Horizontal pipe, 6. Vertical cylinder, 7. Base, 8. Conical cylinder, 9. Blade, 10. Agitator roller, 11. Impeller, 12. Vertical rod, 13. Support rod, 14. Tank block, 15. Tank cover, 16. Safety valve, 17. Oil injection port, 18. Pagoda head, 19. Check valve, 20. Rubber hose, 21. Observation window, 22. Scale. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1 to 3 The technical solution provided by this utility model is as follows: A transformer vacuum oil injection device, comprising: a tank 1, an oil pump 2, the oil pump 2 being fixedly installed at the bottom of the outer wall of the tank 1, a hose 3, the hose 3 being fixedly installed at the outlet end of the oil pump 2, an oil injection gun 4, the inlet end of the oil injection gun 4 being fixedly connected to the end of the hose 3 away from the oil pump 2, a horizontal pipe 5, the horizontal pipe 5 being fixedly installed at the inlet end of the oil pump 2 and penetrating one side of the outer wall of the tank 1, and a vertical cylinder 6, the vertical cylinder 6 being fixedly connected to the horizontal pipe 1. The end of pipe 5 is away from the oil pump 2. The vertical cylinder 6 is connected to the interior of the horizontal pipe 5. The base 7 is fixed to the bottom end of the vertical cylinder 6 and is fixedly connected to the bottom end of the tank body 1. The conical cylinder 8 is rotatably connected to the top end of the vertical cylinder 6. Multiple blades 9 are provided and are fixedly connected to the inner wall of the conical cylinder 8 in a ring at equal intervals. Multiple stirring rollers 10 are provided and are fixedly connected to the outer wall of the conical cylinder 8 in a ring at equal intervals.

[0020] In the specific implementation process, it is worth noting that tank 1 is the main oil storage and bearing structure of this device, with a sealed oil storage cavity structure, which can meet the storage requirements of transformer insulating oil. The oil pump 2, as the fluid power source of the entire device, is arranged at the bottom of the outer wall of tank 1, which is suitable for the low-level oil extraction condition. It can stably extract the insulating oil inside tank 1 and provide continuous fluid power for oil circulation, stirring and oil injection operations. The hose 3 is made of flexible oil-resistant material, with good bending adaptability and corrosion resistance. It can be adapted to the position adjustment action of the oil injection gun 4, while ensuring the sealing and stability of the oil transportation process. The oil injection gun 4 is the end-acting oil injection component, which can flexibly control the oil flow and spray state, and is adapted to the docking operation of different oil injection interfaces of the transformer. The horizontal pipe 5 serves as a transverse oil guide channel, penetrating the side wall of tank 1 to realize the connection between the internal and external pipelines. The vertical cylinder 6 and horizontal pipe 5 are connected and cooperate to form a vertical oil guide cavity, which is used to collect the oil inside the guide tank 1 and provide a stable flow channel for negative pressure forming and fluid impact operation. The base 7 plays the role of fixing and supporting the vertical cylinder 6, and can limit the overall position of the vertical cylinder 6 to ensure the stability of pipeline connection. The conical cylinder 8 can rotate freely relative to the top of the vertical cylinder 6, providing the basic conditions for the rotational movement of the stirring structure. The conical cylinder 8 and the vertical cylinder 6 are rotatably connected by a sealed bearing. Multiple sets of annularly arranged blades 9 can fully bear the kinetic energy of fluid impact and efficiently drive the overall rotation of the conical cylinder 8. The evenly distributed structure can ensure balanced force and stable operation. Multiple sets of stirring rollers 10 rotate synchronously with the conical cylinder 8, which can disturb and stir the oil inside the tank 1, effectively improving the problem of static stratification and sedimentation of insulating oil.

[0021] Furthermore, it also includes: an impeller 11, which is located inside the upper part of the vertical cylinder 6; a vertical rod 12, which is fixed to the top of the impeller 11; and two support rods 13, which are fixed to the outer sides of the vertical rod 12 respectively, with the ends of the support rods 13 away from the vertical rod 12 being fixedly connected to the vertical cylinder 6.

[0022] In the specific implementation process, it is worth noting that the impeller 11 is built into the main flow channel area inside the vertical cylinder 6, which can fully receive the high-speed oil fluid flowing through the vertical cylinder 6. Under the impact of the fluid, it rotates passively, converting the fluid kinetic energy into auxiliary mechanical power, which is superimposed with the power of the blades 9, effectively increasing the rotational torque of the conical cylinder 8. The upright 12 serves as the central fixed base of the impeller 11, used to stably support the impeller 11, ensure the coaxiality of the impeller 11 during rotation, and avoid eccentric rotation, shaking, and jamming. Two sets of symmetrically arranged support rods 13 form a double-sided support and fixing structure, which stably connects the upright 12 to the inner wall of the vertical cylinder 6. The fixing structure is symmetrical and balanced, with strong support stability, which can effectively resist the vibration generated by the impact of high-speed fluid, ensure the long-term stable operation of the impeller 11, and prevent the components from loosening and falling off.

[0023] Furthermore, it also includes: a groove block 14, which is snapped onto the outer wall of the handle of the oil gun 4, and the groove block 14 is fixedly connected to the tank body 1.

[0024] In the specific implementation process, it is worth noting that the slot block 14 adopts a slot-type structure that adapts to the shape of the handle of the oil gun 4, which can realize the snap-fit ​​and limit the oil gun 4 handle. At the same time, the slot block 14 is rigidly fixed to the tank body 1, which can stably store and fix the oil gun 4 when it is not in use, avoiding the problems of hose bending and wear, loosening and leakage caused by the oil gun 4 being suspended and swinging at will. This effectively improves the overall neatness of the equipment and the safety of operation, while extending the service life of the pipeline and oil gun components.

[0025] Furthermore, it also includes: a can lid 15, which is fixedly installed on the top of the tank body 1; a safety valve 16, which is fixedly installed on the top of the can lid 15; and an oil filling port 17, which is fixedly installed on one side of the top of the outer wall of the tank body 1.

[0026] In the specific implementation process, it is worth noting that the can lid 15 seals the top of the can body 1, which can achieve a tight seal of the internal cavity of the can body 1, ensuring the closed environment required for the vacuum oil filling operation of the device. At the same time, it can isolate external dust, water vapor and impurities, preventing the insulating oil from being contaminated and deteriorated. The safety valve 16 is a pressure safety protection component of the can body 1, which can monitor the internal air pressure and oil pressure of the can body 1 in real time. When the internal pressure exceeds the preset safety threshold, it can automatically release pressure, effectively avoiding the risk of overpressure deformation and damage of the can body, and ensuring the safe operation of the equipment. The oil filling interface 17 is the oil replenishment channel of the can body 1, which can be conveniently connected to external oil supply equipment to replenish the insulating oil inside the can body 1.

[0027] Furthermore, it also includes: a pagoda head 18, which is fixedly installed at the outlet end of the oil injection gun 4; a one-way valve 19, which is fixedly installed on the other side of the top of the outer wall of the tank body 1; and a rubber tube 20, which is fixedly connected to the inlet end of the one-way valve 19.

[0028] In the specific implementation process, it is worth noting that the pagoda head 18 is a special pipeline plug-in connector with a structure adapted to the inner diameter of the rubber tube 20. The plug-in connection has strong sealing performance and is easy to connect, which can quickly realize the connection between the liquid outlet of the oil gun 4 and the return pipeline, and establish a closed loop return path. The one-way valve 19 has the functions of one-way conduction and reverse cut-off, which can effectively prevent the insulating oil inside the tank 1 from backflowing and overflowing through the rubber tube 20, avoid oil backflow leakage, affect the circulation stirring condition, and ensure the operational stability of the closed loop return system. The rubber tube 20 is a flexible return pipeline with excellent oil and corrosion resistance and bending performance. It can be adapted to the position adjustment of the oil gun 4 and stably guide the oil after circulation stirring back into the tank 1, realizing the self-circulation pretreatment operation without external containers.

[0029] Furthermore, it also includes: an observation window 21, which is embedded and fixed to the outer wall of the tank 1; and a scale 22, which is set vertically in two sets, with the two sets of scales 22 respectively set on both sides of the observation window 21 and on the outer wall of the tank 1.

[0030] In the specific implementation process, it is worth noting that the observation window 21 is made of transparent high-pressure resistant material and is embedded in the wall. It has excellent sealing and pressure resistance. It can directly observe the internal oil status, stirring conditions and liquid level without opening the tank 1, realizing visual operation monitoring. The two sets of vertically symmetrical scales 22, together with the observation window 21, can read the remaining capacity of the insulating oil inside the tank 1. This allows the operator to keep abreast of the oil storage status, replenish the oil in time, avoid the problem of operation interruption caused by insufficient oil, and ensure the continuous and stable operation of the oil filling operation.

[0031] Working principle: Oil injection and stirring principle: During transformer oil filling operations, when the operator adds insulating oil to the tank 1, they first place the oil nozzle 4 into the appropriate receiving container. After this initial positioning, the operator starts the oil pump 2 and pulls the control lever of the oil nozzle 4. During the operation of the oil pump 2, a negative pressure suction is created inside the horizontal pipe 5, which in turn creates a negative pressure differential inside the vertical cylinder 6. Under the combined action of atmospheric pressure and the negative pressure differential, the insulating oil stored inside the tank 1 is rapidly guided to the connecting cavity between the conical cylinder 8 and the vertical cylinder 6. The oil medium then flows sequentially through the horizontal pipe 5, the oil pump 2, and the hose 3, finally being stably discharged through the oil nozzle 4. During the high-speed flow of the oil, the fluid medium continuously impacts the blades 9 that are attached to the inner wall of the conical cylinder 8. Based on the principle of fluid impact work, the blades 9 are forced to generate rotational power, thus… The synchronously driven conical cylinder 8 and the bottom integrated stirring roller 10 rotate coaxially. The continuously rotating stirring roller 10 can agitate and stir the insulating oil that is stationary inside the tank 1, effectively solving the problem of component sedimentation and density stratification caused by the static setting of the insulating oil, and ensuring that the physical and chemical properties of the oil are uniform. After the oil inside the tank 1 has completed sufficient self-circulation and homogenization stirring, the outlet end of the oil injection gun 4 is precisely connected to the oil injection interface of the transformer to be injected, and standardized oil injection can be carried out. The device makes full use of the potential energy of the oil flow during the oil injection process to realize the autonomous operation of the stirring mechanism. There is no need to install an additional stirring drive motor and matching transmission and electrical control components. While ensuring the homogeneous mixing of the insulating oil and completely eliminating the defects of oil stratification, the device structure is greatly simplified, the equipment manufacturing and maintenance costs are reduced, and it is suitable for various transformer oil injection scenarios for promotion and use.

[0032] Circulation reflux principle: The operator can insert the pagoda head 18, which is fixedly mounted on the outlet end of the oil injection gun 4, into the rubber hose 20 to achieve a sealed connection of the pipeline. After the pipeline connection is completed, the oil pump 2 is started and the wrench of the oil injection gun 4 is pulled. The equipment enters the oil circulation and stirring mode. The insulating oil inside the tank 1 can be guided and stirred through the entire pipeline system. The oil discharged from the oil injection gun 4 can be directly returned to the tank 1 through the rubber hose 20 and the one-way valve 19, forming a complete closed-loop circulation return circuit. This achieves internal self-circulation and homogenization of the insulating oil, eliminating the need for external receiving containers for oil storage and transfer operations. It completely eliminates the need for manual oil transfer after operation, effectively simplifying the pre-treatment process, shortening the preparation time before oil injection, and improving the overall convenience and efficiency of transformer oil injection operations.

[0033] Assisted enhancement principle: During the flow of insulating oil medium through the vertical cylinder 6 into the horizontal pipe 5, the high-speed fluid can precisely impact the impeller 11 built into the pipeline. Under the continuous action of the fluid impact force, the impeller 11 is passively rotated, converting the fluid kinetic energy into mechanical rotational kinetic energy. The auxiliary rotational power can be superimposed with the transmission power of the blades 9, effectively improving the rotational torque and operational stability of the conical cylinder 8, driving the stirring roller 10 to more comprehensively and uniformly agitate and mix the insulating oil inside the tank 1, improving the homogenization effect of the oil. At the same time, the observation window 21 embedded in the outer wall of the tank 1 and the matching scale 22 constitute a visual liquid level monitoring structure, which can realize real-time visual observation of the oil storage in the tank 1, making it convenient for operators to accurately grasp the remaining oil volume, replenish insulating oil in a timely manner and as needed, effectively avoid the problem of operation interruption due to insufficient oil, and ensure the continuous and stable operation of transformer oil filling.

[0034] 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 vacuum oil injection device, characterized in that, include: Tank body (1); An oil pump (2) is fixedly installed on the bottom of the outer wall of the tank (1); Hose (3), which is fixedly installed at the outlet end of the oil pump (2); The oil injection gun (4) has its inlet end fixedly connected to the end of the hose (3) away from the oil pump (2); A horizontal pipe (5) is fixedly installed at the inlet end of the oil pump (2) and the horizontal pipe (5) penetrates one side of the outer wall of the tank (1); Vertical cylinder (6), the vertical cylinder (6) is fixed to the end of the horizontal pipe (5) away from the oil pump (2), and the vertical cylinder (6) is connected to the interior of the horizontal pipe (5); The base (7) is fixedly connected to the bottom end of the vertical cylinder (6) and the base (7) is fixedly connected to the bottom end of the tank body (1); A conical cylinder (8) is rotatably connected to the top of the vertical cylinder (6); Multiple blades (9) are provided, and the multiple blades (9) are fixed in a ring at equal intervals on the inner wall of the conical cylinder (8); A plurality of stirring rollers (10) are provided, and the plurality of stirring rollers (10) are fixedly connected in an annular shape at equal intervals to the outer wall of the conical cylinder (8).

2. The transformer vacuum oil injection device according to claim 1, characterized in that, Also includes: Impeller (11), the impeller (11) is located above the interior of the vertical cylinder (6); A support rod (12) is fixed to the top of the impeller (11); Support rod (13), two support rods (13) are provided, and the two support rods (13) are respectively fixed to the outer walls of the upright (12). The ends of the support rods (13) away from the upright (12) are fixedly connected to the vertical cylinder (6).

3. The transformer vacuum oil injection device according to claim 1, characterized in that, Also includes: The groove block (14) is snapped onto the outer wall of the handle of the oil gun (4) and is fixedly connected to the tank (1).

4. The transformer vacuum oil injection device according to claim 1, characterized in that, Also includes: A can lid (15) is fixedly installed on the top of the can body (1); Safety valve (16), which is fixedly installed on the top of the can cover (15); Oil injection port (17) is fixedly installed on one side of the top of the outer wall of the tank (1).

5. A transformer vacuum oil injection device according to claim 1, characterized in that, Also includes: The pagoda head (18) is fixedly installed at the liquid outlet end of the oil injection gun (4); One-way valve (19), which is fixedly installed on the other side of the top of the outer wall of the tank (1); A rubber tube (20) is fixed to the inlet end of the one-way valve (19).

6. A transformer vacuum oil injection device according to claim 1, characterized in that, Also includes: An observation window (21) is embedded and fixed to the outer wall of the tank (1); The scale (22) is arranged in two vertical groups, and the two groups of scale (22) are respectively arranged on both sides of the observation window (21). The scale (22) is arranged on the outer wall of the tank (1).

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