A transformer oil sample external drawing device

Abstract

The utility model discloses a transformer oil sample external leading device, include: pipeline, joint and take oil sample valve, the first end of pipeline is communicated with the oil sample pipeline of transformer converter variable transformer body through joint, and the second end leads to the firewall outside of transformer, and take oil sample valve is set up in the second end of pipeline. The transformer oil sample external leading device provided in the scheme, the first end of pipeline is communicated with the oil sample pipeline of transformer converter variable transformer body through joint, and the second end leads to the firewall outside of transformer and is equipped with take oil sample valve, to realize the oil sample port of transformer converter variable transformer body and lead to the firewall outside, in this way, the operation and maintenance personnel can avoid the long time of staying when the transformer body is taken off line and detects the oil sample, and the problem of increasing the personal safety risk of operation and maintenance personnel is increased.

Description

Technical Field

[0001] This utility model relates to the field of power transformer technology, and in particular to a transformer oil sample external lead-out device. Background Technology

[0002] Currently, when maintenance and repair personnel take oil samples offline from the transformer (or reactor) for testing, there are issues such as long waiting times and increased personal safety risks for the personnel. Utility Model Content

[0003] In view of this, the present invention provides a transformer oil sample external lead-out device, which can lead the oil sample taking port of the transformer converter body to outside the firewall. In this way, when operation and maintenance personnel take oil samples offline from the transformer body for testing, the problem of long stay time and increased personal safety risks to operation and maintenance personnel can be avoided.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A transformer oil sample extraction device includes: a pipeline, a connector, and an oil sample valve;

[0006] The first end of the pipeline is connected to the oil sampling pipeline of the transformer converter body through the connector, and the second end is led to the outside of the fire wall of the transformer.

[0007] The oil sampling valve is located at the second end of the pipeline.

[0008] Preferably, the pipeline includes at least: a first vertical section, a lower horizontal section, a second vertical section, and a middle horizontal section connected in sequence;

[0009] The upper end of the first vertical section is connected to the oil sampling pipeline through the joint, and the middle and lower part is laid along the first side wall of the transformer accident oil pool;

[0010] The lower horizontal section is laid across the accident oil pool;

[0011] The lower middle part of the second vertical section is laid near the second sidewall of the accident oil pool; wherein the first sidewall and the second sidewall of the accident oil pool are opposite to each other;

[0012] The mid-horizontal segment extends outside the firewall.

[0013] Preferably, it also includes a slot box;

[0014] The tank has a U-shaped structure, with the vertical section of the tank arranged along the first side wall of the accident oil pool, the horizontal section spanning across the accident oil pool, and the other vertical section located near the second side wall of the accident oil pool.

[0015] The lower middle part of the first vertical section, the lower horizontal section, and the lower middle part of the second vertical section are laid in the vertical section, horizontal section, and another vertical section of the slot box, respectively.

[0016] Preferably, it further includes a heating component for heating the pipeline.

[0017] Preferably, the heating assembly includes a heating strip and is wrapped around the outer peripheral wall of the pipeline.

[0018] Preferably, the heating assembly further includes: a power supply and a temperature controller;

[0019] The power supply is electrically connected to the heating belt and the temperature controller, respectively.

[0020] The temperature controller is communicatively connected to the heating belt and can control the heating temperature of the heating belt.

[0021] Preferably, it also includes a protective case;

[0022] The protective enclosure is used to be installed on the outer wall of the firewall;

[0023] The second end of the pipeline leads into the protective box, and the oil sampling valve is located inside the protective box;

[0024] The power supply and the temperature controller are respectively located inside the protective box.

[0025] Preferably, it also includes a heat insulation component, which is disposed on the outside of the heating belt and the pipeline.

[0026] Preferably, the insulation component includes flame-retardant insulation cotton and is wrapped around the outside of the heating belt and the pipeline.

[0027] Preferably, it also includes protective components;

[0028] The protective component includes a corrugated metal flexible hose and is fitted over the portion of the hose located outside the firewall.

[0029] As can be seen from the above technical solution, in the transformer oil sample external lead-out device provided by this utility model, the oil inlet end of the pipeline is connected to the oil sampling pipeline of the transformer converter transformer body through a connector, and the oil outlet end is led to the outside of the transformer firewall and is equipped with an oil sampling valve, thereby realizing the lead-out of the oil sampling port of the transformer converter transformer body to the outside of the firewall. In this way, when the operation and maintenance personnel take oil samples offline from the transformer body for testing, the problem of long stay time and increased personal safety risks of operation and maintenance personnel can be avoided. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of the structure of the transformer oil sample external lead-out device provided in this embodiment of the utility model;

[0032] Figure 2 This is a partial structural schematic diagram of the transformer oil sample external lead-out device provided in an embodiment of this utility model.

[0033] Among them, 1 is the converter transformer body, 2 is the valve, 3 is the tee, 4 is the pipeline, 41 is the first vertical section, 42 is the lower horizontal section, 43 is the second vertical section, 44 is the middle horizontal section, 45 is the third vertical section, 46 is the upper horizontal section, 5 is the tank, 6 is the protective box, 7 is the oil sampling valve, 8 is the heating belt, 9 is the flame-retardant insulation cotton, 10 is the metal corrugated hose, 11 is the power supply, 12 is the temperature controller, 13 is the firewall, 14 is the emergency oil pool, 15 is the grating, and 16 is the cobblestone. Detailed Implementation

[0034] The purpose of this solution is to provide an external oil sampling port device for transformers in cold regions, which leads the oil sampling port of the transformer (or reactor) to the outside of the firewall. This way, when maintenance personnel take oil samples offline from the transformer (or reactor) for testing, they can avoid long stay times and increase the personal safety risks of maintenance personnel.

[0035] 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.

[0036] The transformer oil sample external lead-out device provided in this embodiment of the utility model, such as Figure 1 As shown, it includes: pipeline 4, connector and oil sampling valve 7;

[0037] The first end of pipeline 4 is connected to the oil sampling pipeline of transformer converter body 1 through a connector, and the second end is led to the outside of the transformer firewall 13.

[0038] like Figure 2 As shown, the oil sampling valve 7 is located at the second end of the pipeline 4.

[0039] It should be noted that, as Figure 1 As shown, the connector can be a tee 3 (i.e., a tee pipe), meaning that the first end (oil inlet) of pipe 4 can be connected to the oil sampling pipe of the converter transformer body 1 through the tee 3, thus achieving the connection between the first end of pipe 4 and the oil sampling pipe of the transformer converter transformer body 1. The second end (oil outlet) of pipe 4 can be led to the outside of the transformer's firewall 13 and fixed, thereby realizing the external lead-out of the oil sampling port of the transformer converter transformer body 1. The converter transformer body 1 is filled with transformer oil, and the oil sampling pipe of the converter transformer body 1 is connected to the oil sampling valve (i.e., valve 2) of the converter transformer body 1. A tee 3 is added at this oil sampling pipe to serve as the external lead-out interface for the oil sampling port of the converter transformer body 1. Of course, pipe 4 is equivalent to an external lead-out pipe, and it can be laid according to a preset path between the converter transformer body 1 and the firewall 13, and fixed after passing through the firewall 13. Additionally, as... Figure 2 As shown, the oil sampling valve 7 is located at the second end of the pipeline 4, which serves as the switch for the oil outlet of the pipeline 4.

[0040] In other words, in the transformer oil sample external lead-out device provided by this solution, the oil inlet end of pipeline 4 is connected to the oil sampling pipeline of the transformer converter transformer body 1 through a connector, and the oil outlet end is led to the outside of the transformer firewall 13 and is equipped with an oil sampling valve 7. This realizes the lead-out of the oil sampling port of the transformer converter transformer body 1 to the outside of the firewall. In this way, when the operation and maintenance personnel take oil samples offline from the transformer body for testing, the problem of long stay time and increased personal safety risks of the operation and maintenance personnel can be avoided.

[0041] In this plan, such as Figure 1 As shown, the pipeline 4 includes at least: a first vertical section 41, a lower horizontal section 42, a second vertical section 43, and a middle horizontal section 44 connected in sequence;

[0042] The upper end of the first vertical section 41 is connected to the oil sampling pipeline through a joint, and the middle and lower part is laid along the first side wall of the transformer accident oil pool 14.

[0043] The lower horizontal section 42 is laid across the accident oil pool 14 and is located above the cobblestones 16 at the bottom of the accident oil pool 14.

[0044] The lower middle part of the second vertical section 43 is laid near the second side wall of the accident oil pool 14; wherein the first side wall and the second side wall of the accident oil pool 14 are opposite to each other.

[0045] The mid-level section 44 extends beyond the firewall 13.

[0046] It should be noted that, as Figure 1As shown, the upper end of the first vertical section 41 (i.e., the first end of the pipeline 4) can be connected to the oil sampling pipeline of the converter transformer body 1 through the tee 3, and the middle and lower part can be laid along the first side wall of the emergency oil pool 14; the lower horizontal section 42 can be laid across the emergency oil pool 14 and is located above the pebbles 16 at the bottom of the emergency oil pool 14; the middle and lower part of the second vertical section 43 can be laid close to the second side wall of the emergency oil pool 14, or it can be laid along the second side wall of the emergency oil pool 14; wherein, as Figure 1 As shown, the first and second sidewalls of the emergency oil tank 14 are distributed opposite to each other, and the first sidewall of the emergency oil tank 14 is located below the oil sampling pipeline of the converter transformer body 1. The second sidewall is close to the firewall 13, and the bottom of the emergency oil tank 14 is provided with pebbles 16, and the opening (top) of the tank is provided with a grid 15. Of course, under normal circumstances, there is no oil in the emergency oil tank 14. The middle horizontal section 44 can be at the same height as the grid 15 of the emergency oil tank 14, and extends laterally out of the firewall 13, thereby realizing the external extension of the oil sampling port of the transformer converter transformer body 1. In addition, as Figure 1 As shown, the pipeline 4 also includes a third vertical section 45 and an upper horizontal section 46 connected in sequence to the middle horizontal section 44. Of course, the pipeline 4 can be a single copper pipe without any joints in the middle. The third vertical section 45 is laid close to the outer wall of the firewall 13, and the upper horizontal section 46 can be distributed perpendicular to the outer wall of the firewall 13. Moreover, the end of the upper horizontal section 46 can serve as the second end of the pipeline 4 and is equipped with an oil sampling valve 7. The upper horizontal section 46 can be slightly lower than the oil sampling pipeline of the converter transformer body 1. In other words, the pipeline 4 is designed and laid in this way so that it can be laid between the converter transformer body 1 and the firewall 13 in a better path, and it is also convenient to lead it to the outside of the firewall 13.

[0047] Furthermore, such as Figure 1 As shown, the transformer oil sample external lead-out device provided in this embodiment of the present invention also includes a trough box 5;

[0048] The tank 5 has a U-shaped structure, and the vertical section of the tank 5 is set along the first side wall of the accident oil pool 14, the horizontal section is set across the accident oil pool 14, and the other vertical section is set close to the second side wall of the accident oil pool 14.

[0049] The lower middle part of the first vertical section 41, the lower horizontal section 42, and the lower middle part of the second vertical section 43 are laid in the vertical section, horizontal section, and another vertical section of the slot box 5.

[0050] It should be noted that, as Figure 1As shown, the trough 5 can be a U-shaped trough, and its vertical section can be set along the first side wall of the accident oil pool 14, and its horizontal section can be set across the accident oil pool 14 and located above the pebbles 16 at the bottom of the accident oil pool 14. The other vertical section can be set close to the second side wall of the accident oil pool 14, or it can be set along the second side wall of the accident oil pool 14. The lower middle part of the first vertical section 41, the lower horizontal section 42, and the lower middle part of the second vertical section 43 are laid in the vertical section, horizontal section, and the other vertical section of the trough 5, so as to protect the part of the pipeline 4 laid in the accident oil pool 14. Of course, the trough 5 can be a cable trough.

[0051] Furthermore, the transformer oil sample extraction device provided in this embodiment of the invention also includes a heating component for heating the pipeline 4. By heating the pipeline 4 with the heating component, it is ensured that the transformer oil sample can still flow smoothly out of the pipeline 4 in cold regions, preventing blockage of the oil sample within the pipeline 4. Accordingly, this solution provides a transformer oil sample extraction device suitable for cold regions.

[0052] In this plan, such as Figure 2 As shown, the heating assembly includes a heating band 8, which is wrapped around the outer periphery of the pipe 4. The heating band 8 can be an explosion-proof heating band, and it can be distributed between the first and second ends of the pipe 4, meaning the heating band 8 can achieve full coverage of the entire pipe 4, thus enabling the pipe 4 to achieve a good heating effect. Furthermore, the pipe 4 can be a single copper pipe with an inner diameter of φ8mm.

[0053] Specifically, such as Figure 2 As shown, the heating assembly also includes: a power supply 11 and a thermostat 12;

[0054] Power supply 11 is electrically connected to heating belt 8 and temperature controller 12 respectively;

[0055] The thermostat 12 is connected to the heating belt 8 and can control the heating temperature of the heating belt 8.

[0056] It should be noted that the heating assembly may also include a temperature sensor, which may be located on the part of the pipe 4 outside the firewall 13 and is also communicatively connected to the thermostat 12; wherein, the temperature sensor is used to detect the temperature of the pipe 4; in addition, the power supply 11 and the thermostat 12 may be respectively located on the outside of the firewall 13, and the power supply 11 can be used to power the thermostat 12, the heating band 8 and the temperature sensor; furthermore, the thermostat 12 can control the heating temperature of the heating band 8 according to the detection feedback of the temperature sensor, thereby achieving precise heating of the pipe 4.

[0057] Furthermore, such as Figure 1As shown, the transformer oil sample external lead-out device provided in this embodiment of the present invention also includes a protective box 6;

[0058] like Figure 1 As shown, the protective box 6 is used to install on the outer wall of the firewall 13;

[0059] like Figure 2 As shown, the second end of the pipeline 4 is led into the protective box 6, and the oil sampling valve 7 is located inside the protective box 6;

[0060] The power supply 11 and the temperature controller 12 are respectively located inside the protective box 6.

[0061] It should be noted that, as Figure 1 As shown, the protective box 6 can be installed on the outer wall of the firewall 13, and can be slightly lower than the oil sampling pipeline of the converter body 1; the third vertical section 45 of the pipeline 4 extends upward into the protective box 6, and the upper horizontal section 46 is located inside the protective box 6, with the oil sampling valve 7 located at the end of the upper horizontal section 46; of course, the end of the upper horizontal section 46 can be fixed by a bracket installed inside the protective box 6; the power supply 11 and the temperature controller 12 can be respectively installed on the first inner wall of the protective box 6; wherein, the first inner wall of the protective box 6 can be parallel to the outer wall of the firewall 13; in addition, the side of the protective box 6 away from the firewall 13 can be provided with a door that can be opened and closed, so as to realize the opening and closing of the protective box 6; that is to say, this design can protect the oil sampling valve 7, the power supply 11 and the temperature controller 12 at the second end of the pipeline 4, and also facilitates centralized management of these components.

[0062] Furthermore, the transformer oil sample external lead-out device provided in this embodiment of the present invention also includes a heat insulation component, which is disposed on the outside of the heating belt 8 and the pipeline 4. This can achieve heat insulation for the heating of the pipeline 5, thereby ensuring that the pipeline 4 obtains a stable heating effect.

[0063] In this plan, such as Figure 2 As shown, the insulation component includes flame-retardant insulation cotton 9, which is wrapped around the heating band 8 and the pipe 4. The flame-retardant insulation cotton 9 can be high-temperature resistant flame-retardant insulation cotton, and it is distributed between the first and second ends of the pipe 4, thus providing good insulation for the pipe 4.

[0064] Specifically, the transformer oil sample external lead-out device provided in this embodiment of the present invention also includes a protective component;

[0065] like Figure 2 As shown, the protective component includes a metal corrugated hose 10, which is fitted over the portion of the conduit 4 located outside the firewall 13.

[0066] It should be noted that the metal corrugated hose 10 can be a stainless steel metal corrugated hose, and can be sleeved on the outside of the flame-retardant insulation cotton 9 of the third vertical section 5 of the pipeline 4, and can be distributed between the middle horizontal section 44 and the protective box 6, so as to protect the exposed part of the pipeline 4; of course, the metal corrugated hose 10 is equivalent to the protective layer of this part of the pipeline 4.

[0067] In addition, it should be noted that, in accordance with the requirements of documents such as the "Notice of the State Grid Equipment Department on Further Standardizing the Handling Requirements for Abnormal Oil Chromatography of UHV Transformers and Converter Transformers (Trial Implementation)," this solution has designed an external transformer oil sample lead-out device to lead the oil sampling port of the transformer (or reactor) to the outside of the firewall. This way, when maintenance and repair personnel take oil samples offline from the transformer (or reactor) for testing, they can avoid long stay times and increase the personal safety risks of maintenance and repair personnel.

[0068] Among them, after installing a three-way connector at the oil sample outlet of the transformer body, a copper pipe with an inner diameter of φ8mm is used to lead the oil sample outlet of the converter transformer body to the outside of the firewall and fix it. The copper pipe is a whole copper pipe without any joints in the middle. An oil sample valve is added to the tail of the copper pipe, and a protective box is set up on the outside.

[0069] An explosion-proof heating belt is wrapped around the outside of the entire copper pipe leading out. The explosion-proof heating belt is then wrapped with high-temperature resistant and flame-retardant insulation cotton for insulation. The part of the copper pipe located in the emergency oil pool is placed in a cable tray. The heating belt can be controlled by a temperature controller. The heating belt heats the transformer oil inside the copper pipe, ensuring that in cold regions, the oil viscosity will not increase due to excessively low temperature, preventing the oil sample from flowing out smoothly along the device.

[0070] In other words, this solution actually provides a transformer oil sampling port external lead device suitable for high-altitude and cold regions. A tee is added to the oil sampling valve on the transformer tank wall to expand the oil sampling port external lead. After the tee connector is installed at the oil sampling external lead position, a whole copper pipe with an inner diameter of φ8mm is used. An explosion-proof heating belt is wrapped around the outside, and the outside of the explosion-proof heating belt is wrapped with high-temperature resistant and flame-retardant insulation cotton for insulation. The exposed part is also protected by a stainless steel corrugated flexible hose, while the part located in the accident oil pool is placed in a cable tray.

[0071] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0072] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transformer oil sample external lead-out device, characterized in that, include: Pipeline (4), connector and oil sampling valve (7); The first end of the pipeline (4) is connected to the oil sampling pipeline of the transformer converter body (1) through the connector, and the second end is led to the outside of the fire wall (13) of the transformer. The oil sampling valve (7) is located at the second end of the pipeline (4).

2. The transformer oil sample external lead-out device according to claim 1, characterized in that, The pipeline (4) includes at least: a first vertical section (41), a lower horizontal section (42), a second vertical section (43), and a middle horizontal section (44) connected in sequence. The upper end of the first vertical section (41) is connected to the oil sampling pipeline through the joint, and the middle and lower part is laid along the first side wall of the transformer accident oil pool (14); The lower horizontal section (42) is laid across the accident oil pool (14); The lower middle part of the second vertical section (43) is laid close to the second side wall of the accident oil pool (14); wherein the first side wall and the second side wall of the accident oil pool (14) are opposite to each other; The mid-level segment (44) extends beyond the firewall (13).

3. The transformer oil sample external lead-out device according to claim 2, characterized in that, It also includes the slot box (5); The tank (5) has a U-shaped structure, and the vertical section of the tank (5) is set along the first side wall of the accident oil pool (14), the horizontal section is set across the accident oil pool (14), and the other vertical section is set close to the second side wall of the accident oil pool (14). The lower middle part of the first vertical section (41), the lower horizontal section (42) and the lower middle part of the second vertical section (43) are laid in the vertical section, horizontal section and another vertical section of the slot box (5).

4. The transformer oil sample external lead-out device according to claim 1, characterized in that, It also includes a heating component for heating the pipe (4).

5. The transformer oil sample external lead-out device according to claim 4, characterized in that, The heating assembly includes a heating band (8) and is wrapped around the outer periphery of the pipe (4).

6. The transformer oil sample external lead-out device according to claim 5, characterized in that, The heating assembly also includes: a power supply (11) and a temperature controller (12). The power supply (11) is electrically connected to the heating belt (8) and the temperature controller (12) respectively; The temperature controller (12) is communicatively connected to the heating belt (8) and can control the heating temperature of the heating belt (8).

7. The transformer oil sample external lead-out device according to claim 6, characterized in that, It also includes a protective case (6); The protective box (6) is used to be installed on the outer wall of the firewall (13); The second end of the pipeline (4) is led into the protective box (6), and the oil sampling valve (7) is located inside the protective box (6); The power supply (11) and the temperature controller (12) are respectively installed inside the protective box (6).

8. The transformer oil sample external lead-out device according to claim 5, characterized in that, It also includes a heat insulation component, which is disposed on the outside of the heating band (8) and the pipe (4).

9. The transformer oil sample external lead-out device according to claim 8, characterized in that, The insulation component includes flame-retardant insulation cotton (9) and is wrapped around the outside of the heating band (8) and the pipe (4).

10. The transformer oil sample external lead-out device according to claim 1, characterized in that, It also includes protective components; The protective component includes a corrugated metal hose (10) and is fitted over the portion of the conduit (4) located outside the firewall (13).

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