A transformer oil pit outside oil taking device
By designing an oil sampling device outside the transformer oil pit, the safety hazards and efficiency bottlenecks of traditional sampling methods have been solved, enabling remote sampling and efficient and safe oil sample acquisition, thus meeting the real-time monitoring needs of the smart grid.
Patent Information
- Application Number
- CN202521422453.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-08
- Publication Date
- 2026-06-26
- Estimated Expiration
- 2035-07-08
AI Technical Summary
Traditional transformer sampling methods have safety hazards and efficiency bottlenecks. Operators need to get close to the transformer to take samples, and they cannot meet the needs of smart grids for real-time monitoring of equipment status.
Design an oil sampling device outside the transformer oil pit. Through the oil inlet pipe, fireproof tank box and oil sampling valve box, remote sampling can be achieved. It integrates fire prevention and dynamic protection, avoids close-range operation by personnel, and improves safety and emergency response capabilities.
Remote sampling was achieved, reducing operational risks, improving sampling efficiency and detection accuracy, and enhancing equipment safety and emergency response capabilities.
Smart Images
Figure CN224416493U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer monitoring technology, and in particular to an oil sampling device outside the transformer oil pit. Background Technology
[0002] Transformer oil, as a critical medium in transformer operation, plays a vital role in insulation and heat dissipation. Regular oil quality testing is an essential maintenance step to ensure the safe and stable operation of the equipment. Sampling must be performed in strict accordance with operating procedures: first, thoroughly clean the sampling valve to prevent contamination from external impurities; second, drain some of the old oil to ensure a fresh sample; finally, seal and store the sample in a dedicated sampling bottle and send it for testing promptly. The oil quality test results directly impact subsequent maintenance decisions. If oil deterioration is detected, timely oil filtration or replacement is necessary. Therefore, standardized sampling is the primary step in ensuring the health of the transformer.
[0003] Traditional transformer sampling valve designs present significant safety hazards, typically being installed in confined spaces at the bottom or side of the equipment. Operators must approach the hazardous area between the transformer and firewalls to take samples; if the equipment is equipped with a box-in enclosure, operators must even enter the confined space. This design not only exposes personnel to high temperatures and electromagnetic fields but may also hinder rapid evacuation in the event of equipment malfunction. Furthermore, the confined space restricts the placement of emergency equipment, significantly increasing the difficulty of emergency response in the event of oil leaks or fires.
[0004] Another prominent problem with current sampling methods is their efficiency bottleneck. Due to the concealed location of sampling points and limited operating space, a single sampling can take 15-20 minutes, severely impacting the timeliness of testing. When oil quality abnormalities require urgent retesting, traditional methods struggle to obtain multiple batches of samples in a timely manner. Furthermore, close-range manual operation is prone to human error; issues such as incomplete valve cleaning or delayed sealing can lead to sample distortion. These limitations mean that existing sampling methods cannot meet the real-time monitoring needs of smart grids for equipment status, nor do they satisfy the dual standards of safety and efficiency required by modern power systems. Utility Model Content
[0005] To address existing problems, this utility model provides an oil sampling device outside the transformer oil pit. The purpose is to simultaneously solve the safety hazards and efficiency bottlenecks of traditional sampling methods through spatial isolation and dynamic protection, and to provide full-process protection for ensuring the authenticity of oil samples.
[0006] To achieve the above objectives, the present invention provides the following technical solution.
[0007] An oil sampling device outside a transformer oil pit includes an oil inlet pipe, a fireproof tank, a special oil sampling port, and an oil sampling valve box. One end of the oil inlet pipe is connected to the oil outlet of the transformer body, and the other end of the oil inlet pipe is connected to the oil sampling valve box. A special oil sampling port is provided outside the oil sampling valve box. The special oil sampling port is a wall structure located at a firewall outside the transformer. The fireproof tank is a square tube and is arranged to surround the entire length of the oil inlet pipe.
[0008] As a further improvement of this utility model, the oil inlet pipe adopts a smooth design along its entire length.
[0009] As a further improvement of this utility model, the oil inlet pipe also includes a coil section; the coil section is disposed on the side of the oil inlet pipe near the special oil intake port.
[0010] As a further improvement of this utility model, it also includes a fixed bracket; the fixed bracket is fixedly connected to the coil section.
[0011] As a further improvement of this utility model, the oil sampling valve box has built-in thermal insulation material. As a further improvement of this utility model, the special oil sampling port is a firewall structure made of reinforced concrete.
[0012] As a further improvement of this utility model, it also includes an electric heating tape; the electric heating tape is wrapped around the outer wall of the oil inlet pipe.
[0013] As a further improvement of this utility model, the oil inlet pipe also includes an upward-turning section; the upward-turning section is disposed on the side of the oil inlet pipe near the special oil intake port.
[0014] As a further improvement of this utility model, the oil inlet pipe also includes an oil sampling valve; the oil sampling valve is located on the side of the oil inlet pipe near the special oil sampling port.
[0015] As a further improvement of this utility model, it also includes a rubber tube or a corrugated tube; the rubber tube or corrugated tube is wrapped around the outer wall of the oil inlet pipe.
[0016] This utility model has the following beneficial effects:
[0017] By extending the oil pipe outside the firewall, remote sampling is achieved, completely avoiding the risk of personnel approaching the main body or entering the soundproof enclosure, thus ensuring operational safety; the oil pipe is fully encased in a fireproof box to block the spread of fire and reduce the risk of fire caused by oil pipe rupture; the oil sampling valve box is embedded in the firewall, integrating equipment protection and building fire protection functions, and improving the overall emergency response capability.
[0018] Preferably, the oil inlet pipe has a smooth design along its entire length, which can reduce the flow resistance of the oil circuit, reduce the risk of leakage, extend the service life of the pipeline, and reduce the potential for oil contamination.
[0019] Preferably, a coil section is added to buffer the impact of oil flow and absorb the stress of thermal expansion and contraction, preventing the joint from loosening and leaking.
[0020] Preferably, the fixed support can constrain the deformation and displacement of the coil, maintain the geometric stability of the pipeline, and reduce the probability of mechanical fatigue fracture.
[0021] Preferably, the valve box has a built-in thermal insulation layer to reduce the impact of external temperature fluctuations on the oil sample and maintain oil temperature stability to ensure detection accuracy.
[0022] Preferably, the firewall's fire resistance limit is increased to provide a physical isolation barrier for sudden fires.
[0023] Preferably, the oil is prevented from solidifying in a low-temperature environment to ensure the feasibility of sampling in all weather conditions.
[0024] Preferably, the upward-turning section design can form a liquid seal to prevent air backflow and avoid oxidation and deterioration of the oil sample.
[0025] Preferably, the oil sampling valve is located at the front, which allows operators to directly control the sampling flow rate and eliminates the need for operators to repeatedly open and close the main valve.
[0026] Optionally, the oil inlet pipe can be covered with a rubber tube / corrugated pipe to protect it from external mechanical damage and chemical corrosion, thus extending its service life. Attached Figure Description
[0027] The accompanying drawings described herein are for illustrative purposes only and do not limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. In the drawings:
[0028] Figure 1 Diagram showing the current state of oil extraction from the existing transformer oil pit;
[0029] Figure 2 This is a schematic diagram of the buried pipe of an oil sampling device outside a transformer oil pit as described in Example 1;
[0030] Figure 3 This is a schematic diagram of the buried pipe of an oil sampling device outside a transformer oil pit as described in Example 2;
[0031] Among them, 1. oil inlet pipe; 2. fireproof tank box; 3. special oil sampling port; 4. oil sampling valve box; 5. radiator; 6. transformer body; 7. oil pit; 8. firewall; 9. soundproof enclosure; 10. original personnel sampling point. Detailed Implementation
[0032] To enable those skilled in the art to better understand the technical solutions of this utility model, 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. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
[0033] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.
[0034] Unless otherwise defined below, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0035] Example 1
[0036] Taking a 1000kV high-resistance transformer as an example, such as Figure 1 As shown, the sampling valve of the high-resistance transformer is located on the side of the transformer body 6. When operating personnel go to the original sampling point 10 to take oil, they need to pass through the firewall 8, enter the oil pit 7, and then enter the soundproof enclosure 9 to perform the oil sampling operation. 5 is the radiator of the high-resistance transformer. Conventional oil sampling methods cannot guarantee the safety of operating personnel and oil sampling equipment, and emergency response capabilities need to be improved.
[0037] like Figure 2 As shown, an oil sampling device outside a transformer oil pit includes an oil inlet pipe 1, a fireproof tank box 2, a special oil sampling port 3, and an oil sampling valve box 4.
[0038] One end of the oil inlet pipe 1 is connected to the oil outlet of the transformer body 6, and the other end of the oil inlet pipe 1 is connected to the oil sampling valve box 4. A special oil sampling port 3 is provided outside the oil sampling valve box 4. The special oil sampling port 3 is a wall structure and is located at the fire wall 8 outside the transformer body 6. The fireproof box 2 is a square tube and is arranged to surround the entire length of the oil inlet pipe 1.
[0039] Specifically, such as Figure 2 As shown, an oil pipe (copper pipe) is drawn from the main valve to the high-resistance transformer oil pit 7, passes through the soundproof enclosure foundation and the oil pit 7, and then bypasses the firewall 8 to the external special oil intake port 3. The oil pipe 1 is entirely housed within a fireproof trough 2. The portion of the fireproof trough 2 inside the oil pit 7 is laid between the upper and lower steel gratings, while the portion outside the oil pit 7 is shallowly buried in the ground, with the top surface of the fireproof trough 2 flush with the ground. The special oil intake port 3 at the end of the firewall 8 has dimensions of 1000mm wide, 1000mm long, and 2200mm high. The wall and roof of the special oil intake port 3 are constructed of reinforced concrete, with a strip foundation. The wall is designed according to firewall standards, with a thickness of 200mm. The exterior wall is finished with profiled steel sheets. An oil sampling valve box 4 is suspended inside, with internal insulation material. The external special oil intake port 3 is approximately 1 meter above the ground.
[0040] The entire length of the oil inlet pipe 1 is designed with a smooth surface. There should be no welding or other types of joints in the middle of the oil inlet pipe 1, and the bends in the oil pipe should be smooth. Leak detection measures should be taken before the oil pipeline is installed to ensure that there are no leaks, pinholes, etc.
[0041] The oil sampling valve box 4 has built-in thermal insulation material.
[0042] The special oil intake port 3 is a firewall structure made of reinforced concrete.
[0043] The oil inlet pipe 1 also includes an upward-turning section; the upward-turning section is located on the side of the oil inlet pipe 1 near the special oil intake port 3. The oil inlet pipe 1 of the oil pipeline should preferably be upward-turned to prevent gas from entering the equipment body.
[0044] The oil inlet pipe 1 also includes an oil sampling valve; the oil sampling valve is located on the side of the oil inlet pipe 1 near the special oil sampling port 3.
[0045] This embodiment also includes a rubber tube or a corrugated tube; the rubber tube or corrugated tube is wrapped around the outer wall of the oil inlet pipe 1.
[0046] Example 2
[0047] like Figure 3 As shown, an oil sampling device outside the transformer oil pit connects the oil sampling valve to the independent special oil sampling port 3 at the end of the low-end firewall 8 via the oil inlet pipe 1 from the transformer body 6.
[0048] like Figure 3 As shown, this method in this embodiment is different from that in Embodiment 1. Figure 2This method can shorten the length of the oil circuit and reduce the impact of adjacent phases. The oil inlet pipe 1 should choose the shortest path while avoiding the fire-fighting riser foundations around the oil pit 7. In contrast, the oil circuit in Embodiment 1 is longer, and the special oil intake port 3 is located within an adjacent phase. When a fault occurs in an adjacent phase, it poses a certain risk to the oil intake phase and may cause the accident to escalate. Therefore, a method of oil intake by setting a special oil intake port 3 at the end of the firewall 8 is proposed. Therefore, the arrangement of the oil inlet pipe 1 in Embodiment 2 is superior to that in Embodiment 1.
[0049] Special oil sampling port 3 is constructed of reinforced concrete, and the wall is designed according to firewall standards. Inside special oil sampling port 3, a fireproof box containing a suspended oil sampling valve is installed, with internal insulation material. Oil pipe 1 is entirely housed within fireproof storage box 2. The fireproof storage box 2 is laid according to the shortest path principle; there should be no welding or other types of joints in the middle of oil pipe 1. Turns in the oil pipe should be smooth, and vibration damping measures should be implemented. A coil can be added to the outlet, and fixed supports should be added at necessary locations to prevent joints from loosening and falling off.
[0050] Compared to conventional methods, this transformer's safe oil sampling design facilitates oil sample collection and analysis, significantly improves the safety of operating personnel and the safety of oil sampling equipment, enhances on-site emergency response capabilities, and reduces personal and material losses caused by accidents, thus yielding significant economic and social benefits.
[0051] The difference between this embodiment and Embodiment 1 is that:
[0052] 1) The oil inlet pipe 1 also includes a coil section; the coil section is located on the side of the oil inlet pipe 1 near the special oil intake port 3.
[0053] 2) It also includes a fixed bracket; the fixed bracket is fixedly connected to the coil section.
[0054] Vibration prevention measures should be taken for the external oil extraction pipe. A coil section can be added to one side of the special oil extraction port 3. Fixed supports should be added to the necessary parts of the coil section to prevent the joints from loosening and falling off. The oil extraction pipe should not affect normal inspection.
[0055] Example 3
[0056] The difference between this embodiment and Embodiment 1 is that:
[0057] It also includes an electric heating cable; the electric heating cable is wrapped around the outer wall of the oil inlet pipe 1.
[0058] The sampling tube uses an electric heating cable that is attached to the entire surface of the copper pipe to achieve a heat preservation effect. The electric heating cable is a self-regulating and explosion-proof product, and the maximum temperature of the heating cable can be controlled within a range of 65℃. When the temperature exceeds 65℃, the temperature will not rise further. The heating cable is activated when the pipe temperature is below 0℃ and deactivated when it reaches 15℃. The electric heating cable can be used in sections on the oil inlet pipe 1 along with rubber hoses or corrugated pipes, with the rubber hoses or corrugated pipes used at both ends of the oil inlet pipe.
[0059] The specific steps for using this utility model are as follows:
[0060] 1. Equipment preparation and inspection:
[0061] Check if the oil inlet pipe 1 is leaking; check if the fireproof tank box 2 completely surrounds the entire length of the oil inlet pipe 1; at the same time, if necessary (such as in a low temperature environment), activate the electric heating tape to maintain the fluidity of the oil, and verify whether the heat insulation material in the oil sampling valve box 4 is intact.
[0062] 2. Pipe cleaning and venting:
[0063] Open the oil sampling valve to allow the oil to flow into the oil inlet pipe 1; the initial oil discharge is used to clean the inside of the pipe and remove air to ensure the purity of the oil sample; after the oil discharge is completed, close the valve, and repeat this step if necessary to remove impurities.
[0064] 3. Oil sample collection:
[0065] Insert the sampling tool (such as a syringe or a special container) into the special oil sampling port 3; reopen the oil sampling valve and slowly extract oil to the required volume (e.g., 90 ml). The oil extraction process should be kept sealed to reduce the contact between the oil and air, thereby improving the accuracy of the test.
[0066] 4. Sampling End and Closure:
[0067] Immediately after oil sampling, close the oil sampling valve; remove the sampling tool and seal the oil sample container. Check the oil inlet pipe 1 and special oil sampling port 3 for any residual oil.
[0068] 5. Device reset and cleaning:
[0069] Clean the oil sampling valve box 4 and surrounding area to ensure no oil residue remains; reset all valves and components. The electric heating tape can be turned off if the device is not in use for an extended period.
[0070] The advantages of this utility model are:
[0071] The method of leading the oil circuit of the high-impact transformer to the end of the firewall 8 facilitates oil sampling and analysis, greatly improves the safety protection level of operators and the safety of oil sampling equipment, enhances the on-site emergency response capability, and reduces personal and material losses caused by accidents, thus having high economic and social benefits.
[0072] The above embodiments are merely one of the implementation methods for achieving the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions, and other implementation methods that are easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.
Claims
1. An oil sampling device outside a transformer oil pit, characterized in that, It includes an oil inlet pipe, a fireproof tank, a special oil sampling port, and an oil sampling valve box; one end of the oil inlet pipe is connected to the oil outlet of the transformer body, and the other end of the oil inlet pipe is connected to the oil sampling valve box; a special oil sampling port is provided outside the oil sampling valve box, and the special oil sampling port is a wall structure, which is set at the firewall outside the transformer; the fireproof tank is a square tube and is arranged to surround the entire length of the oil inlet pipe.
2. The oil sampling device outside the transformer oil pit according to claim 1, characterized in that, The entire length of the oil inlet pipe adopts a smooth design.
3. The oil sampling device outside the transformer oil pit according to claim 2, characterized in that, The oil inlet pipe also includes a coil section; the coil section is located on the side of the oil inlet pipe near the special oil intake port.
4. The oil sampling device outside the transformer oil pit according to claim 3, characterized in that, It also includes a fixed bracket; the fixed bracket is fixedly connected to the coil section.
5. The oil sampling device outside the transformer oil pit according to claim 1, characterized in that, The oil sampling valve box has built-in thermal insulation material.
6. The oil sampling device outside the transformer oil pit according to claim 1, characterized in that, The special oil intake port is a firewall structure made of reinforced concrete.
7. The oil sampling device outside the transformer oil pit according to claim 1, characterized in that, It also includes an electric heating tape; the electric heating tape is wrapped around the outer wall of the oil inlet pipe.
8. The oil sampling device outside the transformer oil pit according to claim 1, characterized in that, The oil inlet pipe also includes an upward-turning section; the upward-turning section is located on the side of the oil inlet pipe near the special oil intake port.
9. The oil sampling device outside the transformer oil pit according to claim 1, characterized in that, The oil inlet pipe also includes an oil sampling valve; the oil sampling valve is located on the side of the oil inlet pipe near the special oil sampling port.
10. The oil sampling device outside the transformer oil pit according to claim 1, characterized in that, It also includes rubber tubing or corrugated tubing; the rubber tubing or corrugated tubing covers the outer wall of the oil inlet pipe.