Oil filter for variable-pressure oil chromatography detection

Abstract

The utility model discloses an oil filter for variable pressure oil chromatography detection, which relates to the field of filtration in the variable pressure oil extraction process and comprises a sampling barrel, two butt joints protruding downwards are integrally formed at the bottom end of the sampling barrel, the outer walls of the butt joints are connected with the butt joint of a needle in an inserted mode, a filter mechanism is arranged on the inner wall of the sampling barrel, and the filter mechanism is connected with the sampling barrel. A top opening of the sampling barrel is in threaded connection with a top cover, a hollow top end plate of the top cover in a screwed state is used for limiting the filtering mechanism, a one-way oil inlet mechanism is mounted in one butt joint, and a one-way oil outlet mechanism is mounted in the other butt joint. According to the utility model, the one-way oil inlet mechanism, the one-way oil outlet mechanism and the filtering mechanism are arranged, and the one-way oil inlet mechanism and the one-way oil outlet mechanism are separated by the filtering mechanism, so that the problem that impurities are brought out again when hydraulic oil is pushed out can be avoided after filtering by the filtering mechanism, and meanwhile, the impurities in the hydraulic oil can be effectively filtered.

Description

TECHNICAL FIELD

[0001] The utility model relates to the filter field in the extraction process of transformer oil, specifically is a kind of filter oiler for chromatographic detection of transformer oil. BACKGROUND

[0002] In the transformer of voltage grade in 66KV and above, after oil injection is stationary, withstand voltage and partial discharge experiment 24h, impact closing and operation 24h under rated voltage, each carries out chromatographic analysis of the oil species dissolved gas of insulating oil in transformer body.

[0003] In prior art, the extraction of transformer oil is extracted by syringe, and balance carrier gas is added, then oscillator is used to shake, and the gas (such as hydrogen, acetylene, etc.) contained in transformer oil is precipitated, and finally the gas is extracted and added to the variable chromatograph for chromatographic detection;

[0004] In the above process, when extracting transformer oil, the impurities (generated due to oxidation of transformer oil) contained in transformer oil will affect the detection result during detection, and in prior art, since the extraction of transformer oil, the addition of carrier gas and the shaking process cannot directly contact with air, which will cause the gas mixed in transformer oil to change, so there is no effective filtering device. UTILITY MODEL CONTENT

[0005] The utility model aims at: in order to solve the problem proposed in the above background art, provide a kind of filter oiler for chromatographic detection of transformer oil.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of filter oiler for chromatographic detection of transformer oil, including sampling cylinder, the bottom end of the sampling cylinder is integrally formed with two downward protruding butt joints, the outer wall of the butt joint is inserted with the butt joint of needle, the inner wall of the sampling cylinder is provided with filter mechanism, and the top opening of the sampling cylinder is screw-threaded with top cover, the hollow top end plate of the top cover in screwing state is used to limit the filter mechanism, the inside of one butt joint is installed with one-way oil inlet mechanism, the inside of another butt joint is installed with one-way oil outlet mechanism, the inner wall of the sampling cylinder is slidably connected with the piston that penetrates to the top of the top cover.

[0007] As a further scheme of the utility model: the one-way oil inlet mechanism includes a one-way plug ring and a one-way fixed plate installed in one of the butt joints, the one-way plug ring is above the one-way fixed plate, a one-way plug ball is clamped at the opening of the one-way plug ring, a one-way guide rod penetrating through the bottom of the one-way fixed plate is integrally formed at the outer wall of the one-way plug ball, a one-way protruding plate is integrally formed at the outer wall of the one-way guide rod between the one-way plug ring and the one-way fixed plate, a one-way spring is fixedly connected between the bottom end of the one-way protruding plate and the top end of the one-way fixed plate, and the one-way spring is sleeved with the one-way guide rod.

[0008] As a further scheme of the utility model: the one-way oil outlet mechanism includes a two-way plug ring and a two-way fixed plate installed in one of the butt joints, the two-way plug ring is below the two-way fixed plate, a two-way plug ball is clamped at the opening of the two-way plug ring, a two-way guide rod penetrating through the top of the two-way fixed plate is integrally formed at the outer peripheral top end of the two-way plug ball, a two-way protruding plate is integrally formed at the outer wall of the two-way guide rod between the two-way plug ring and the two-way fixed plate, a two-way spring is fixedly connected between the top end of the two-way protruding plate and the bottom end of the two-way fixed plate, and the two-way spring is sleeved with the two-way guide rod.

[0009] As a further scheme of the utility model: the one-way fixed plate and the two-way fixed plate are both porous structures, and the bottom end of the one-way guide rod and the top end of the two-way guide rod are both integrally formed with anti-disengagement parts.

[0010] As a further scheme of the utility model: the filter mechanism includes two sliding grooves formed in the inner wall of the sampling cylinder, the two sliding grooves are symmetrically arranged, sliding rods are slidably connected to the inner wall of the sliding grooves, and a filter screen is fixedly connected between the two sliding rods.

[0011] As a further scheme of the utility model: the bottom end of the filter screen is integrally formed with a downward protruding separation strip, and a separation groove accommodating the separation strip is formed in the bottom end of the inner wall of the sampling cylinder.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. By arranging the one-way oil inlet mechanism, the one-way oil outlet mechanism and the filter mechanism, the filter mechanism separates the one-way oil inlet mechanism and the one-way oil outlet mechanism, so that after filtration, the problem of bringing impurities out again when the hydraulic oil is pushed out can be avoided, and the impurities in the hydraulic oil can be effectively filtered. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model discloses a structure schematic view;

[0015] Figure 2 It is the inside structure schematic view of the sampling cylinder of the utility model;

[0016] Figure 3 It is the opening schematic view of the groove of the utility model;

[0017] Figure 4 It is the Figure 2 It is the local enlarged view of A place in the middle.

[0018] In the drawing: 1, sampling cylinder; 2, top cover; 3, butt joint; 4, piston; 5, needle; 6, sliding rod; 7, filter screen; 8, sliding slot; 9, groove; 10, partition strip; 11, No. 1 blocking ring; 12, No. 1 fixed plate; 13, No. 1 blocking ball; 14, No. 1 guide rod; 15, No. 1 protruding plate; 16, No. 1 spring; 17, No. 2 blocking ring; 18, No. 2 fixed plate; 19, No. 2 blocking ball; 20, No. 2 guide rod; 21, No. 2 protruding plate; 22, No. 2 spring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Please refer to Figures 1-4 In the embodiments of the utility model, an oil filter for chromatographic detection of transformer oil includes a sampling cylinder 1, two downward protruding butt joints 3 are integrally formed at the bottom end of the sampling cylinder 1, the outer wall of the butt joint 3 is inserted with the plug of the needle 5, a filter mechanism is arranged on the inner wall of the sampling cylinder 1, a top cover 2 is threadedly connected with the top opening of the sampling cylinder 1, the hollow top end plate of the top cover 2 in the screwed state is used for limiting the filter mechanism, a one-way oil inlet mechanism is installed in the inside of one butt joint 3, a one-way oil outlet mechanism is installed in the inside of the other butt joint 3, and a piston 4 penetrating to the upper part of the top cover 2 is slidingly connected with the inner wall of the sampling cylinder 1.

[0021] In this embodiment: first in the extraction of the pressure oil, the needle 5 is inserted into the docking head 3 with a one-way oil inlet mechanism, at this time the piston 4 is at the lowest point, then pull the piston rod of the piston 4 upward to move upward, the upward moving piston rod pulls the piston part of the piston 4 to move upward, the negative pressure generated draws the pressure oil into the sampling cylinder 1, and the particulate impurities contained in the pressure oil are intercepted by the filtering mechanism during the process of entering the sampling cylinder 1. After sampling, the balance carrier gas is extracted into the sampling cylinder 1, and finally the pressure oil mixed with the balance carrier gas is injected into the shaker. When the needle 5 connected to the docking head 3 is removed and a new needle 5 is installed on the docking head 3 with a one-way oil outlet mechanism, the pressure oil mixed with the balance carrier gas can be injected into the shaker. The shaker shakes the pressure oil to shake out various gases mixed in the pressure oil, and then extracts the gas for detection in the gas chromatograph.

[0022] Please refer to Figure 4 , the one-way oil inlet mechanism includes a first blocking ring 11 and a first fixed plate 12 installed inside a docking head 3, the first blocking ring 11 is located above the first fixed plate 12, a first blocking ball 13 is clamped at the opening of the first blocking ring 11, a first guide rod 14 is integrally formed on the outer wall of the first blocking ball 13 and penetrates to the lower side of the first fixed plate 12, a first protruding plate 15 is integrally formed on the outer wall of the first guide rod 14 between the first blocking ring 11 and the first fixed plate 12, a first spring 16 is fixedly connected between the bottom end of the first protruding plate 15 and the top end of the first fixed plate 12, and the first spring 16 is sleeved with the first guide rod 14.

[0023] In this embodiment: when extracting the pressure oil, the first blocking ball 13 moves upward under the action of negative pressure, which drives the first guide rod 14 and the first protruding plate 15 to move upward synchronously, at this time the first spring 16 is elongated, and the pressure oil enters the inside of the sampling cylinder 1 through the docking head 3 with a one-way oil inlet mechanism under the action of negative pressure. During the extraction process, the one-way oil outlet mechanism is tightly closed, and external air or impurities cannot enter the sampling cylinder 1.

[0024] Please refer to Figure 4 , the one-way oil outlet mechanism includes a second blocking ring 17 and a second fixed plate 18 installed inside a docking head 3, the second blocking ring 17 is located below the second fixed plate 18, a second blocking ball 19 is clamped at the opening of the second blocking ring 17, a second guide rod 20 is integrally formed on the outer wall of the second blocking ball 19 and penetrates to the upper side of the second fixed plate 18, a second protruding plate 21 is integrally formed on the outer wall of the second guide rod 20 between the second blocking ring 17 and the second fixed plate 18, a second spring 22 is fixedly connected between the top end of the second protruding plate 21 and the bottom end of the second fixed plate 18, and the second spring 22 is sleeved with the second guide rod 20.

[0025] In the embodiment: after the balance carrier gas is added, the balance carrier gas mixed with the variable pressure oil is pushed out, at this time, the second blocking ball 19 moves downward, the second guide rod 20 and the second protruding plate 21 are synchronously moved downward under the action of the second blocking ball 19, at this time, the second spring 22 is pulled up, the balance carrier gas mixed with the variable pressure oil flows out from the docking head 3 with the one-way oil outlet mechanism, and enters the shock instrument, because the two docking heads 3 are symmetrically distributed, and the oil inlet position and the oil outlet position are intercepted by the filtering mechanism, therefore, the variable pressure oil pushed out cannot take out impurities again.

[0026] Please refer to Figure 4 The first fixed plate 12 and the second fixed plate 18 are both porous structures, and the bottom end of the first guide rod 14 and the top end of the second guide rod 20 are integrally formed with anti-disengagement parts.

[0027] In the embodiment: the porous structure of the first fixed plate 12 and the second fixed plate 18 can realize the smooth passage of the variable pressure oil through the first fixed plate 12 and the second fixed plate 18;

[0028] The setting of the anti-disengagement part can avoid the disengagement of the bottom end of the first guide rod 14 and the second guide rod 20.

[0029] Please refer to Figure 4 The filtering mechanism includes two sliding grooves 8 opened in the inner wall of the sampling cylinder 1, the two sliding grooves 8 are symmetrically arranged, and the inner wall of the sliding groove 8 is slidably connected with a sliding rod 6, and the two sliding rods 6 are fixedly connected with a filter screen 7.

[0030] In the embodiment: in the process that the variable pressure oil passes through the docking head 3 with the one-way oil inlet mechanism and enters the sampling cylinder 1, the impurities contained in the variable pressure oil are intercepted and filtered by the filter screen 7, at this time, the intercepted impurities are located in the inner cavity of the docking head 3, therefore, in the process that the variable pressure oil is pushed out, the variable pressure oil cannot carry the impurities into the docking head 3 with the one-way oil outlet mechanism;

[0031] In the process of long-time use, the accumulation of impurities may cause blockage, at this time, the top cover 2 is unscrewed, and the sliding rod 6 is pulled to move upward, the sliding rod 6 can take out the filter screen 7, at this time, the ultrasonic cleaning device can be used to clean the device, and the device can be cleaned.

[0032] Please refer to Figure 3 And Figure 4 The bottom end of the filter screen 7 is integrally formed with a downward protruding partition strip 10, and the inner wall of the sampling cylinder 1 is provided with a partition groove 9 for accommodating the partition strip 10.

[0033] In the embodiment, the design can increase the blocking area, avoids the situation that part of impurities enter the butt joint 3 with the one-way oil outlet mechanism through the bottom of the filter screen 7, and thus better filtering effect is achieved.

[0034] The above merely describes a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A filter for chromatographic detection of transformer oil, comprising a sampling cylinder (1), the bottom end of which is integrally formed with two downwardly protruding butt joints (3), characterized in that, The outer wall of the docking joint (3) is plugged into the docking joint of the needle (5), the inner wall of the sampling cylinder (1) is provided with a filtering mechanism, and the top opening of the sampling cylinder (1) is threadedly connected to the top cover (2), and the hollow top plate of the top cover (2) in a tightened state is used to limit the filtering mechanism. A one-way oil inlet mechanism is installed inside one of the docking joints (3), and a one-way oil outlet mechanism is installed inside the other docking joint (3). The inner wall of the sampling cylinder (1) is slidably connected to a piston (4) that penetrates to the top of the top cover (2).

2. The filter according to claim 1, wherein The one-way oil inlet mechanism comprises a No. 1 blocking ring (11) and a No. 1 fixed plate (12) installed inside the docking joint (3); the No. 1 blocking ring (11) is located above the No. 1 fixed plate (12); a No. 1 blocking ball (13) is clamped at the opening of the No. 1 blocking ring (11); a No. 1 guide rod (14) is integrally formed below the outer wall of the No. 1 blocking ball (13) and extends to the bottom of the No. 1 fixed plate (12); a No. 1 protruding plate (15) is integrally formed on the outer wall of the No. 1 guide rod (14) between the No. 1 blocking ring (11) and the No. 1 fixed plate (12); a No. 1 spring (16) is fixedly connected between the bottom end of the No. 1 protruding plate (15) and the top end of the No. 1 fixed plate (12); and the No. 1 spring (16) is sleeved with the No. 1 guide rod (14).

3. The filter according to claim 2, wherein The one-way oil outlet mechanism comprises a No. 2 blocking ring (17) and a No. 2 fixed plate (18) installed inside one of the docking joints (3); the No. 2 blocking ring (17) is located below the No. 2 fixed plate (18); a No. 2 blocking ball (19) is clamped at the opening of the No. 2 blocking ring (17); a No. 2 guide rod (20) is integrally formed at the top of the outer periphery of the No. 2 blocking ball (19) and extends to the top of the No. 2 fixed plate (18); a No. 2 protruding plate (21) is integrally formed on the outer wall of the No. 2 guide rod (20) and located between the No. 2 blocking ring (17) and the No. 2 fixed plate (18); a No. 2 spring (22) is fixedly connected between the top of the No. 2 protruding plate (21) and the bottom end of the No. 2 fixed plate (18); and the No. 2 spring (22) is sleeved with the No. 2 guide rod (20).

4. The filter according to claim 3, wherein The No. 1 fixing plate (12) and the No. 2 fixing plate (18) both have a porous structure, and the bottom end of the No. 1 guide rod (14) and the top end of the No. 2 guide rod (20) are both integrally formed with an anti-slip portion.

5. The filter according to claim 1, wherein The filtering mechanism comprises two slide grooves (8) opened on the inner wall of the sampling tube (1), the two slide grooves (8) are symmetrically arranged, and the inner wall of the slide groove (8) is connected to a sliding rod (6) for sliding up and down, and a filter (7) is fixedly connected between the two sliding rods (6).

6. The filter according to claim 5, wherein A downwardly protruding partition bar (10) is integrally formed at the bottom end of the filter screen (7), and a partition groove (9) for accommodating the partition bar (10) is provided at the bottom end of the inner wall of the sampling cylinder (1).

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