Oil pumping device for fluorescence detection of transformer oil

Abstract

The invention relates to the technical field of transformer fault diagnosis devices, in particular to an oil pumping device for transformer oil fluorescence detection. Comprising an ultraviolet irradiation lamp, and further comprises a filter bin, an oil inlet valve pipe and a conducting valve pipe, the filtering assembly comprises a screening and filtering basket installed in the filtering bin, a filtering cylinder is installed on the screening and filtering basket through an inserting rod unit, and two scraping plates which are symmetrically arranged are installed on the bottom face of the inner side of the screening and filtering basket; the fluorescence detection bin is provided with an oil discharging valve pipe and a negative pressure pumping valve pipe, and is communicated and connected with the filtering bin through a conducting valve pipe; a transparent partition plate is mounted in the fluorescence detection bin; a filtering assembly can adsorb and filter part of oil impurities, an inserting rod unit can vibrate up and down, a scraping plate is matched for reciprocating scraping, filtering blockage is avoided, and the continuous operation capacity of the device is guaranteed; by adopting a detachably mounted sealing structure, the problem that aging is accelerated due to direct exposure in air can be avoided or relieved, internal oil dirt is convenient to clean, and subsequent detection is prevented from being polluted.

Description

Technical Field

[0001] The invention relates to the technical field of transformer fault diagnosis devices, and in particular to an oil pumping device used for transformer oil fluorescence detection. Background Art

[0002] Transformer oil refers to a type of insulating oil used in oil-filled electrical equipment such as transformers, reactors, mutual inductors, bushings, oil switches, etc., to perform insulation, cooling, and arc extinguishing functions; its main components are alkanes, cycloalkanes, saturated hydrocarbons, aromatic unsaturated hydrocarbons, and non-hydrocarbon compounds, which can emit fluorescence under ultraviolet or X-ray irradiation.

[0003] During long-term operation, transformer oil will gradually age due to factors such as heat and oxidation. As transformer oil gradually ages, the content of substances with fluorescent characteristics increases, such as polycyclic aromatic hydrocarbons in the oil. Also, during transformer operation, the insulating oil will be mixed with impurities such as water, organic acids, and metal particles after long-term work. By detecting fluorescence, the degree of aging and impurity conditions of the transformer oil can be evaluated, which makes it easier to replace the oil in time to prevent performance degradation and transformer failure.

[0004] Therefore, fluorescence detection of transformer oil is necessary and of great significance for the maintenance and timely overhaul of transformers. Currently, most of the transformer oil is extracted through an oil extraction device and then irradiated with ultraviolet light or X-rays for fluorescence detection. However, the oil extraction device easily causes the transformer oil to be exposed or contacted with air, which in turn leads to aging of the oil body and affects the insulation performance of the transformer. In addition, the transformer oil body cannot be purified during the detection process. Therefore, it is necessary to consider how to solve the above problems and increase the effective service life of transformer oil. In view of this, we propose an oil extraction device for fluorescence detection of transformer oil. Summary of the invention

[0005] The object of the present invention is to solve the deficiencies mentioned in the above background technology and to provide an oil extraction device for transformer oil fluorescence detection.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An oil extraction device for transformer oil fluorescence detection includes an ultraviolet irradiation lamp for fluorescence detection, and also includes:

[0008] The filter chamber is provided with an oil inlet valve pipe and a conduction valve pipe for introducing and discharging transformer oil;

[0009] The filter assembly comprises a filter basket provided with a sieve hole installed in the filter bin, a filter cartridge is installed on the filter basket through an insertion rod unit, and two symmetrically arranged scraper plates are installed on the inner bottom surface of the filter basket; when the transformer oil impacts the filter cartridge, the insertion rod unit is used to squeeze the scraper plate to scrape back and forth to avoid clogging of the sieve hole;

[0010] The fluorescence detection chamber is provided with an oil discharge valve pipe and a negative pressure valve pipe for externally connecting an oil pump and a vacuum pumping device, and is connected to the filter chamber through the conducting valve pipe;

[0011] A transparent partition is installed in the fluorescence detection chamber, and the ultraviolet irradiation lamp is installed on the fluorescence detection chamber and is located above the transparent partition.

[0012] Preferably, the rod unit comprises a vertical rod threadedly mounted with a limit nut, and a second spring is sleeved on the vertical rod below the limit nut;

[0013] An installation groove is arranged at the upper end of the vertical rod, and a threaded plug rod is detachably installed in the installation groove.

[0014] Preferably, insertion holes for inserting the vertical rod and two limiting plugs are symmetrically arranged on both sides of the interior of the screen basket, and the limiting nut and the second spring are located between the two limiting plugs.

[0015] Preferably, an extrusion head is provided at the bottom end of the vertical rod, and the diameter of the extrusion head gradually increases from bottom to top;

[0016] The two scraper plates are provided with insertion holes for the extrusion head to be inserted and extruded, a connecting groove for installing a tension spring is provided between the two scraper plates, and mesh holes for scraping and filtering impurities are provided on the scraper plates.

[0017] Preferably, shaft blocks are rotatably mounted at both ends of the filter cartridge, and the shaft blocks are mounted on the threaded plug rods at both sides;

[0018] The filter cartridge is provided with a conducting hole and a baffle plate for receiving the impact of transformer oil introduced by the oil inlet valve pipe.

[0019] Preferably, the filter cartridge is filled with one of activated carbon and silica gel adsorption materials.

[0020] Preferably, a second built-in protrusion for lifting the transparent partition is provided inside the fluorescence detection chamber, and a protrusion is provided above the second built-in protrusion in the fluorescence detection chamber;

[0021] The convex block is provided with a horizontal cavity which is in communication with the inside of the fluorescence detection chamber, a clamping block is slidably installed in the horizontal cavity, a packaging plate is detachably installed on the outer side of the convex block, and a first spring is installed between the clamping block and the packaging plate.

[0022] Preferably, the card block is located at the upper end of the inner side of the fluorescence detection chamber and is provided with an extrusion arc surface for receiving the downward pressure of the transparent partition, and the card block is used to press the transparent partition.

[0023] Preferably, a limiting pressure plate for maintaining horizontal movement of the scraper plate is installed inside the screen basket.

[0024] Preferably, an overflow valve pipe is installed between the filtration chamber and the fluorescence detection chamber and at a height below the transparent partition.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The oil pumping device for transformer oil fluorescence detection is provided with a filter assembly in the filter bin, which can absorb and filter some oil impurities, and can make the plunger unit vibrate up and down through the impact of the transformer oil, and cooperate with the scraper plate to scrape the material back and forth, so as to avoid the problem of filter blockage, ensure the continuous operation ability of the device, and help to improve the service life of the transformer oil;

[0027] 2. The device adopts a detachable sealing structure, which can avoid or slow down the problem of accelerated aging caused by direct exposure to the air, and is easy to clean internal oil and dirt to avoid contamination of subsequent inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 This is one of the overall structural schematic diagrams of the present invention;

[0030] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the installation of the filter bin and filter assembly of the present invention;

[0032] Figure 4 This is one of the exploded views of the filter assembly of the present invention;

[0033] Figure 5 This is the second exploded view of the filter assembly of the present invention;

[0034] Figure 6 This is a schematic diagram of the installation of the rod unit and the scraper plate of the present invention;

[0035] Figure 7 It is a schematic diagram of the rod insertion unit of the present invention;

[0036] Figure 8 This is one of the schematic diagrams for installing the fluorescence detection chamber of the present invention;

[0037] Fig. 9 This is the second schematic diagram of the installation of the fluorescence detection chamber of the present invention;

[0038] Fig.10 This is a cross-sectional view of the fluorescence detection chamber of the present invention;

[0039] Fig.11 It is a cross-sectional schematic diagram of the fluorescence detection chamber of the present invention;

[0040] Fig.12 For the present invention Fig.11 A partial enlarged schematic diagram of part A in the middle.

[0041] The meaning of each number in the figure is:

[0042] 1. Filter chamber; 101. First embedded protrusion; 11. Oil inlet valve pipe;

[0043] 2. Fluorescence detection chamber; 201. Second embedded protrusion; 202. Bump; 2021. Horizontal cavity; 203. Packaging plate; 21. Oil drain valve pipe; 22. Negative pressure valve pipe; 23. First spring; 24. Block; 241. Extrusion arc surface;

[0044] 3. Ultraviolet irradiation lamp; 4. Overflow valve pipe; 5. Conducting valve pipe;

[0045] 6. Filter assembly; 61. Screen basket; 611. Edge baffle; 612. Limiting pressure plate; 613. Limiting plug; 6101. Screen hole; 6102. Plug hole; 62. Vertical rod; 621. Mounting slot; 622. Extrusion head; 63. Second spring; 64. Limiting nut; 65. Scraper plate; 651. Mesh hole; 652. Connecting slot; 653. Insertion hole; 66. Tension spring; 67. Filter cartridge; 68. Threaded plug rod;

[0046] 7. Transparent partition. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0048] See also Figure 1-12 The present invention describes the above technical solution in detail through the following embodiments:

[0049] An oil pumping device for transformer oil fluorescence detection includes an ultraviolet irradiation lamp 3 for fluorescence detection. In this embodiment, the technology of ultraviolet irradiation lamp 3 irradiating transformer oil for fluorescence detection belongs to the prior art, so no further explanation is given. Other embodiments may also be equipped with an X-ray irradiation device, and also include:

[0050] The filter chamber 1 is provided with an oil inlet valve pipe 11 and a conducting valve pipe 5 for introducing and discharging transformer oil;

[0051] The fluorescence detection chamber 2 is provided with an oil discharge valve pipe 21 and a negative pressure valve pipe 22 for externally connecting an oil pump and a vacuum device, and is connected to the filter chamber 1 through a conducting valve pipe 5. In this embodiment, in order to avoid the situation where the transformer oil is not discharged in time and causes pollution to the transparent partition 7 or overflow, as shown in FIG. Figure 1 and Figure 2 In the structure shown, an overflow valve pipe 4 is connected and installed between the filter chamber 1 and the fluorescent detection chamber 2 and at a height below the transparent partition 7, so that the transformer oil can flow back into the filter chamber 1; the vacuum pump of this embodiment is connected to the negative pressure valve pipe 22 to form a negative pressure inside the device, which is used to reduce the air content and slow down aging. The transformer oil is sucked from the oil inlet valve pipe 11 through the pressure difference, and under the pressure difference condition and gravity condition, the acceleration of the transformer oil when flowing out of the oil inlet valve pipe 11 will be greater, which is conducive to obtaining a more obvious impact effect; finally, the oil body is returned back by connecting the oil pump installed between the oil discharge valve pipe 21 and the transformer oil mailbox.

[0052] The filter assembly 6 includes a filter basket 61 provided with a sieve hole 6101 installed in the filter bin 1, such as Figure 3 As shown in the structure, in this embodiment, the filter bin 1 is provided with a first embedded protrusion 101, and the filter basket 61 is provided with an edge baffle 611 that cooperates with the first embedded protrusion 101 to lift the basket body; specifically, in this application, Figure 3-Figure 5 In the structure shown, a filter cartridge 67 is rotatably mounted on a filter basket 61 through an insertion rod unit, two symmetrically arranged scraper plates 65 are mounted on the inner bottom surface of the filter basket 61, and a limiting pressure plate 612 is mounted inside the filter basket 61 for maintaining the horizontal movement of the scraper plates 65; in this embodiment, when the transformer oil impacts the filter cartridge 67 from above, the insertion rod unit squeezes the scraper plates 65, so that the scraper plates 65 on both sides form a reciprocating scraping action, which can avoid clogging of the sieve holes 6101 during oil extraction.

[0053] It should be noted that in order to allow the rod unit to vibrate up and down and drive the scraper plates 65 on both sides to open and close, the oil inlet valve pipe 11 and the overflow valve pipe 4 provided on the filter bin 1 are located above the filter cartridge 67 and are eccentrically arranged.

[0054] Specifically, Figure 6As shown in the structure, the rod unit of this embodiment includes a vertical rod 62 with a limit nut 64 threadedly installed, and a mounting groove 621 is provided at the upper end of the vertical rod 62, in which a threaded rod 68 is detachably installed; shaft blocks are rotatably installed at both ends of the filter cartridge 67, and the shaft blocks are installed on the threaded rods 68 on both sides; the filter cartridge 67 is provided with a conducting hole and a baffle for receiving the impact of transformer oil introduced by the oil inlet valve pipe 11, and the filter cartridge 67 can be rotated with the transformer oil that can be eccentrically impacted, and the filter cartridge 67 is filled with activated carbon adsorption material, which can adsorb some tiny impurities, but the adsorption effect on particulate solids is not good, and the filter basket 61 is required to filter the solid impurities.

[0055] In this embodiment, in order to achieve the action of vibrating up and down to push away the scraper plates 65 on both sides, a second spring 63 is sleeved on the vertical rod 62 below the limit nut 64, and in order to maintain the limit position, such as Figure 5 In the structure shown, a plug hole 6102 for inserting the vertical rod 62 and two limit plugs 613 are symmetrically arranged on both sides of the inner side of the screen basket 61, and the limit nut 64 and the second spring 63 are located between the two limit plugs 613; in order to obtain an extrusion structure, such as Figure 7 As shown in the structure, in this embodiment, an extrusion head 622 is provided at the bottom end of the vertical rod 62, and the diameter of the extrusion head 622 gradually increases from bottom to top.

[0056] like Figure 6 In the structure shown, two scraper plates 65 are provided with insertion holes 653 for the extrusion head 622 to be inserted and extruded, a connecting groove 652 for installing a tension spring 66 is provided between the two scraper plates 65, and a mesh 651 for scraping and filtering impurities is provided on the scraper plate 65. Under the impact of transformer oil, the insertion rod unit will vibrate up and down. This action occurs because the transformer oil exerts a downward force during the falling process, compressing the second spring 63 to deform. The second spring 63 will be compressed and reset upward to overcome the impact of the transformer oil, forming a continuous up and down vibration action, that is, driving the insertion vertical rod 62 to move up and down, and then continuously squeezing the scraper plates 6 on both sides to open and close, so as to achieve hanging material and avoid blockage.

[0057] It should be noted that in this embodiment, the cover plate of the filter chamber 1 installed with the oil inlet valve pipe 11 is detachable, and the transparent partition 7 is detachably installed in the fluorescent detection chamber 2. The detachable structure is necessary to facilitate the cleaning of the residual transformer oil inside, provide a consistent detection environment for subsequent detection, and avoid residual oil stain pollution affecting the subsequent transformer oil detection; Figure 1 , Figure 2 and Figure 8 In the structure shown, the ultraviolet irradiation lamp 3 of this embodiment is installed on the fluorescent detection chamber 2 and is located above the transparent partition 7.

[0058] In order to obtain a sealed environment, such as Fig.10, Fig.11 and Fig.12 As shown in the structure, in this embodiment, a second embedded protrusion 201 for lifting the transparent partition 7 is provided inside the fluorescent detection chamber 2, and a protrusion 202 is provided above the second embedded protrusion 201 of the fluorescent detection chamber 2; the protrusion 202 is provided with a horizontal cavity 2021 that is in conduction with the inside of the fluorescent detection chamber 2, and a clamping block 24 is slidably installed in the horizontal cavity 2021, and a packaging plate 203 is detachably installed on the outer side of the protrusion 202, and a first spring 23 is installed between the clamping block 24 and the packaging plate 203; in this embodiment, the transparent partition 7 adopts a transparent acrylic plate, and other embodiments can use a transparent tempered glass plate, and a sealing ring is installed at the contact surface between the transparent partition 7 and the second embedded protrusion 201, and as shown in FIG. Fig.12 In the structure shown, the second embedded protrusion 201 can provide a bending area, which is beneficial to increase the sealing path and improve the sealing effect, and plays the role of supporting the transparent partition 7.

[0059] In order to quickly mount the transparent partition 7, the present embodiment Fig.12 In the structure shown in FIG. 1 , a compression arc surface 241 for receiving the downward pressure of the transparent partition 7 is provided at the upper end of the card block 24 located inside the fluorescence detection chamber 2. The downward pressure applied by the transparent partition 7 from top to bottom will compress the compression arc surface 241, so that the card block 24 shrinks into the horizontal cavity 2021, and the transparent partition 7 is pressed into the horizontal cavity 2021. Fig.12 When in the position shown, the block 24 rebounds and presses the transparent partition 7 tightly. When disassembling, the packaging plate 203 can be directly removed from the outside to loosen the block 24, and then the transparent partition 7 can be directly taken out to clean the oil stain inside the fluorescent detection chamber 2.

[0060] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0061] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. An oil extraction device for transformer oil fluorescence detection, comprising an ultraviolet irradiation lamp (3) for fluorescence detection, characterized in that: Also includes: The filter chamber (1) is provided with an oil inlet valve pipe (11) and a conduction valve pipe (5) for introducing and discharging transformer oil; The filter assembly (6) comprises a filter basket (61) provided with a sieve hole (6101) installed in the filter bin (1), a filter cartridge (67) being installed on the filter basket (61) via an insertion rod unit, and two symmetrically arranged scraper plates (65) being installed on the inner bottom surface of the filter basket (61); when transformer oil impacts the filter cartridge (67), the insertion rod unit is used to squeeze the scraper plate (65) to scrape back and forth to avoid clogging of the sieve hole (6101); The fluorescence detection chamber (2) is provided with an oil discharge valve pipe (21) and a negative pressure valve pipe (22) for externally connecting an oil pump and a vacuum pump, and is connected to the filter chamber (1) via the conduction valve pipe (5); A transparent partition (7) is installed in the fluorescence detection chamber (2), and the ultraviolet irradiation lamp (3) is installed on the fluorescence detection chamber (2) and is located above the transparent partition (7).

2. The oil pumping device for transformer oil fluorescence detection according to claim 1, characterized in that: The rod insertion unit comprises a vertical rod (62) on which a limiting nut (64) is threadedly mounted, and a second spring (63) is sleeved on the vertical rod (62) below the limiting nut (64); The upper end of the vertical rod (62) is provided with a mounting groove (621), and a threaded insert rod (68) is detachably mounted in the mounting groove (621).

3. The oil pumping device for transformer oil fluorescence detection according to claim 2, characterized in that: Insertion holes (6102) for inserting the vertical rod (62) and two limiting insert blocks (613) are symmetrically arranged on both sides of the interior of the sieve basket (61), and the limiting nut (64) and the second spring (63) are located between the two limiting insert blocks (613).

4. The oil pumping device for transformer oil fluorescence detection according to claim 3, characterized in that: The bottom end of the vertical rod (62) is provided with an extrusion head (622), and the diameter of the extrusion head (622) gradually increases from bottom to top; The two scraper plates (65) are provided with insertion holes (653) for the extrusion head (622) to be inserted and extruded, a connecting groove (652) for installing a tension spring (66) is provided between the two scraper plates (65), and mesh holes (651) for scraping and filtering impurities are provided on the scraper plates (65).

5. The oil pumping device for transformer oil fluorescence detection according to claim 2, characterized in that: The filter cartridge (67) has shaft blocks rotatably mounted at both ends, and the shaft blocks are mounted on the threaded plug rods (68) at both sides; The filter cartridge (67) is provided with a conducting hole and a baffle plate for receiving the impact of transformer oil introduced into the oil inlet valve pipe (11).

6. The oil pumping device for transformer oil fluorescence detection according to claim 5, characterized in that: The filter cartridge (67) is filled with one of activated carbon and silica gel adsorption materials.

7. The oil pumping device for transformer oil fluorescence detection according to claim 1, characterized in that: A second embedded protrusion (201) for lifting the transparent partition (7) is provided inside the fluorescence detection chamber (2), and a convex block (202) is provided above the second embedded protrusion (201) in the fluorescence detection chamber (2); The protrusion (202) is provided with a horizontal cavity (2021) which is in communication with the interior of the fluorescence detection chamber (2); a clamping block (24) is slidably installed in the horizontal cavity (2021); a packaging plate (203) is detachably installed on the outside of the protrusion (202); and a first spring (23) is installed between the clamping block (24) and the packaging plate (203).

8. The oil pumping device for transformer oil fluorescence detection according to claim 7, characterized in that: The clamping block (24) is located at the upper end of the inner side of the fluorescence detection chamber (2) and is provided with an extrusion arc surface (241) for receiving the downward pressure of the transparent partition (7). The clamping block (24) is used to press the transparent partition (7).

9. The oil pumping device for transformer oil fluorescence detection according to claim 1, characterized in that: A limiting pressure plate (612) for maintaining the horizontal movement of the scraper plate (65) is installed inside the sieve basket (61).

10. The oil pumping device for transformer oil fluorescence detection according to claim 1, characterized in that: An overflow valve pipe (4) is installed between the filtering chamber (1) and the fluorescence detection chamber (2) and at a height below the transparent partition (7).

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