An oil-immersed transformer oil filtering and replacing structure
By using a reciprocating displacement pump to drive the oil supply circuit and filter, the problem of complex oil filtration and replacement structure in oil-immersed transformers is solved, enabling rapid filtration and replacement of transformer oil and improving insulation and heat dissipation performance.
Patent Information
- Application Number
- CN202521903520.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-04
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-04
AI Technical Summary
Existing oil-immersed transformers have complex oil filtration and replacement structures and are cumbersome to operate, which affects the transformer's insulation and heat dissipation functions.
A reciprocating displacement pump is used to drive the oil supply circuit, combined with a filter and oil changing device, to achieve rapid filtration and replacement of transformer oil.
It enables rapid oil extraction and filtration of transformer oil, simplifies the operation process, and improves the insulation and heat dissipation performance of the transformer.
Smart Images
Figure CN224682903U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer oil changing technology, and in particular to an oil-immersed transformer oil filter and oil changing structure. Background Technology
[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are the primary coil, secondary coil, and magnetic core. Its main functions include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformers). In oil-immersed transformers, the transformer oil serves to insulate, dissipate heat, and suppress arcing. Over time, impurities or moisture can accumulate inside oil-immersed transformers, affecting the oil's insulation, heat dissipation, and arc-suppressing functions, leading to short circuits or even burnout. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide an oil-immersed transformer oil filtration and oil replacement structure that can solve the problems of complex and complicated operation of general oil-immersed transformer oil filtration and oil replacement structures.
[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: an oil-immersed transformer oil filtration and oil changing structure, the innovation of which is: including an oil supply circuit, a reciprocating displacement pump, a filter and an oil changing device; The reciprocating displacement pump includes a pump body and a reciprocating piston; the pump body is provided with a first oil port and a second oil port; the reciprocating piston is disposed in the pump body, and a piston rod extending out of the pump body is connected to the reciprocating piston, and the piston rod is driven by a drive source to drive the reciprocating piston to move reciprocally along the inner wall of the pump body. The oil supply circuit includes an oil suction circuit and an oil discharge circuit; the oil suction circuit includes a first valve group, a second valve group, a third valve group, and a fourth valve group; the first valve group and the second valve group are connected in series and their two ends are respectively connected to the first oil port and the second oil port of the pump body to form a first oil circuit; the first valve group includes a first one-way ball valve and a first control valve, and the second valve group includes a second one-way ball valve and a second control valve; the first one-way ball valve, the first control valve, the second control valve, and the second one-way ball valve are connected in series in the first oil circuit from the first oil port to the second oil port of the pump body; an oil inlet pipe is connected in parallel between the first control valve and the second control valve. The third valve group and the fourth valve group are connected in series, and their two ends are respectively connected in parallel to the two ends of the first valve group and the second valve group. The third valve group and the fourth valve group are respectively connected to the first oil port and the second oil port of the pump body to form a second oil circuit. The third valve group includes a third one-way ball valve and a third control valve, and the fourth valve group includes a fourth one-way ball valve and a fourth control valve. The third control valve, the third one-way ball valve, the fourth one-way ball valve and the fourth control valve are connected in series in the second oil circuit from the first oil port to the second oil port of the pump body. An oil outlet pipe is provided in parallel between the third one-way ball valve and the fourth one-way ball valve. The input end of the filter is connected to the output end of the oil outlet pipe, and the output end of the filter is connected to the oil inlet of the transformer tank; the insulating oil inside the transformer is filtered by the reciprocating displacement pump driving the insulating oil inside the transformer to circulate through the outer wall.
[0005] Furthermore, the oil changing device includes an oil storage tank; the oil storage tank is equipped with a partition that divides the oil storage tank into an oil storage compartment and an oil changing compartment; the oil storage compartment is equipped with an oil storage capsule, and the oil changing compartment is equipped with an oil changing capsule; the oil storage capsule is connected to the oil outlet pipe through a pipe for releasing the insulating oil in the transformer and storing it in the oil storage capsule; the oil changing capsule contains the transformer insulating oil to be replaced; after the oil is drained, the oil inlet pipe is connected to the oil changing capsule and the oil outlet pipe is connected to the oil inlet of the transformer in a reverse connection manner, for pumping the new insulating oil in the oil changing capsule into the transformer oil tank.
[0006] The advantages of this utility model are: 1) This utility model uses a reciprocating displacement pump to drive the oil supply circuit, so that when the reciprocating displacement pump is in motion, whether it is pumping in or out, the pump body is always in the oil suction state through the control of the oil circuit, which ensures the efficiency of rapid oil discharge from the transformer oil tank; when filtering, the output end of the oil outlet pipe only needs to be connected to the filter, and then the output end of the filter is connected to the oil inlet of the transformer oil tank, which can realize one-way circulation filtration outside the transformer oil tank; when changing the oil, the inlet and outlet pipes are reversed, that is, the oil inlet pipe is connected to the oil changing capsule, and the oil outlet pipe is connected to the oil inlet of the transformer oil tank, which can quickly realize the replacement of transformer oil. Attached Figure Description
[0007] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0008] Figure 1 This is a schematic diagram illustrating the working principle of an oil-immersed transformer in oil filtration mode according to this utility model.
[0009] Figure 2 This is a schematic diagram illustrating the working principle of an oil-immersed transformer in oil changing mode according to this utility model. Detailed Implementation
[0010] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0011] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0012] like Figure 1 Figure 2 The oil-immersed transformer oil filtration and replacement structure shown includes an oil supply line 1, a reciprocating displacement pump 2, a filter 3, and an oil replacement device 4.
[0013] The reciprocating displacement pump 2 includes a pump body 21 and a reciprocating piston 22; the pump body 21 is provided with a first oil port 23 and a second oil port 24; the reciprocating piston 22 is disposed inside the pump body 21, and a piston rod extending out of the pump body is connected to the reciprocating piston 22, and the piston rod is driven by a drive source to drive the reciprocating piston 22 to reciprocate along the inner wall of the pump body 21.
[0014] The oil supply circuit 1 includes an oil suction circuit 11 and an oil discharge circuit 12. The oil suction circuit 11 includes a first valve group 13, a second valve group 14, a third valve group 15, and a fourth valve group 16. The first valve group 13 and the second valve group 14 are connected in series and their two ends are respectively connected to the first oil port 23 and the second oil port 24 of the pump body 21 to form a first oil circuit. The first valve group 13 includes a first one-way ball valve 131 and a first control valve 132, and the second valve group 14 includes a second one-way ball valve 141 and a second control valve 142. The first one-way ball valve 131, the first control valve 132, the second control valve 142, and the second one-way ball valve 141 are connected in series in the first oil circuit from the first oil port 23 to the second oil port 24 of the pump body 21. An oil inlet pipe is connected in parallel between the first control valve 132 and the second control valve 142.
[0015] The third valve group 15 and the fourth valve group 16 are connected in series and their two ends are connected in parallel to the two ends of the first valve group 13 and the second valve group 14, respectively. The third valve group 15 and the fourth valve group 16 are respectively connected to the first oil port 23 and the second oil port 24 of the pump body 21 to form a second oil circuit. The third valve group 15 includes a third one-way ball valve 151 and a third control valve 152, and the fourth valve group 16 includes a fourth one-way ball valve 161 and a fourth control valve 162. The third control valve 152, the third one-way ball valve 151, the fourth one-way ball valve 161 and the fourth control valve 162 are connected in series in the second oil circuit from the first oil port 23 of the pump body to the second oil port 24. An oil outlet pipe is provided in parallel between the third one-way ball valve 151 and the fourth one-way ball valve 161.
[0016] The input end of filter 3 is connected to the output end of the oil outlet pipe, and the output end of filter 3 is connected to the oil inlet of the transformer oil tank; the insulating oil inside the transformer is filtered by the reciprocating displacement pump 2 to drive the insulating oil inside the transformer to circulate through the outer wall.
[0017] The oil changing device 4 includes an oil storage tank; the oil storage tank is equipped with a partition that divides the oil storage tank into an oil storage compartment and an oil changing compartment; the oil storage compartment is equipped with an oil storage capsule 41, and the oil changing compartment is equipped with an oil changing capsule 42; the oil storage capsule 41 is connected to the oil outlet pipe through a pipe, and is used to release the insulating oil in the transformer and store it in the oil storage capsule 41; the oil changing capsule 42 contains the transformer insulating oil to be replaced; after the oil is drained, the oil inlet pipe is connected to the oil changing capsule 42 in a reverse connection manner, and the oil outlet pipe is connected to the oil inlet of the transformer, so as to pump the new insulating oil in the oil changing capsule 42 into the transformer oil tank.
[0018] The working principle of this utility model is as follows: A reciprocating displacement pump drives the oil supply circuit, ensuring that the pump body is always in an oil-suction state during operation, whether pumping in or out, thus guaranteeing efficient rapid oil output from the transformer tank. During filtration, only a filter needs to be connected to the output end of the oil outlet pipe, and then the filter's output end is connected to the inlet of the transformer tank, enabling unidirectional circulation filtration outside the transformer tank. During oil replacement, reverse connection of the inlet and outlet pipes is used; the inlet pipe is connected to the oil replacement capsule, and the outlet pipe is connected to the inlet of the transformer tank, allowing for rapid replacement of the transformer oil.
[0019] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.
Claims
1. An oil-immersed transformer oil filtration and replacement structure, characterized in that: This includes oil supply lines, reciprocating displacement pumps, filters, and oil change devices; The reciprocating displacement pump includes a pump body and a reciprocating piston; the pump body is provided with a first oil port and a second oil port; the reciprocating piston is disposed in the pump body, and a piston rod extending out of the pump body is connected to the reciprocating piston, and the piston rod is driven by a drive source to drive the reciprocating piston to move reciprocally along the inner wall of the pump body. The oil supply circuit includes an oil suction circuit and an oil discharge circuit; the oil suction circuit includes a first valve group, a second valve group, a third valve group, and a fourth valve group; the first valve group and the second valve group are connected in series and their two ends are respectively connected to the first oil port and the second oil port of the pump body to form a first oil circuit; the first valve group includes a first one-way ball valve and a first control valve, and the second valve group includes a second one-way ball valve and a second control valve; the first one-way ball valve, the first control valve, the second control valve, and the second one-way ball valve are connected in series in the first oil circuit from the first oil port to the second oil port of the pump body; an oil inlet pipe is connected in parallel between the first control valve and the second control valve. The third valve group and the fourth valve group are connected in series, and their two ends are respectively connected in parallel to the two ends of the first valve group and the second valve group. The third valve group and the fourth valve group are respectively connected to the first oil port and the second oil port of the pump body to form a second oil circuit. The third valve group includes a third one-way ball valve and a third control valve, and the fourth valve group includes a fourth one-way ball valve and a fourth control valve. The third control valve, the third one-way ball valve, the fourth one-way ball valve and the fourth control valve are connected in series in the second oil circuit from the first oil port to the second oil port of the pump body. An oil outlet pipe is provided in parallel between the third one-way ball valve and the fourth one-way ball valve. The input end of the filter is connected to the output end of the oil outlet pipe, and the output end of the filter is connected to the oil inlet of the transformer tank; the insulating oil inside the transformer is filtered by the reciprocating displacement pump driving the insulating oil inside the transformer to circulate through the outer wall.
2. The oil filtration and oil replacement structure for an oil-immersed transformer according to claim 1, characterized in that: The oil changing device includes an oil storage tank; the oil storage tank is divided into an oil storage compartment and an oil changing compartment by a partition; the oil storage compartment contains an oil storage capsule, and the oil changing compartment contains an oil changing capsule; the oil storage capsule is connected to the oil outlet pipe via a pipe for releasing and storing the insulating oil in the transformer; the oil changing capsule contains the transformer insulating oil to be replaced; after the oil is drained, the oil inlet pipe is connected to the oil changing capsule and the oil outlet pipe is connected to the transformer's oil inlet in a reverse connection manner to pump the new insulating oil in the oil changing capsule into the transformer oil tank.