Oil extraction universal valve device for transformer oil chromatography

Abstract

The oil extraction universal valve device comprises a connecting piece, a spherical oil extraction pipe, a sealing piece and a valve mechanism, the first end of the connecting piece is used for being connected with an oil extraction opening of a transformer, the sealing piece is arranged at the second end of the connecting piece in a sleeved mode, an oil passing channel is formed in the connecting piece, and an installation channel is formed in the sealing piece. A spherical space is formed between the oil passing channel and the mounting channel, the spherical oil taking pipe comprises a spherical end and a connecting end, the spherical end is rotationally connected into the spherical space, the connecting end penetrates through and extends out of the mounting channel, the valve mechanism is arranged in a switchable mode, and the connecting end is connected with the first end of the valve mechanism and extends into the valve mechanism; the second end of the valve mechanism is used for being connected with a three-way valve oil taking opening. After the connection, automatic adjustment can be achieved through the characteristic that the spherical oil taking pipe can be rotationally adjusted, the freedom degree of direction adjustment is high, the whole device is easy to assemble during installation, the sealing performance is good under the combination of the connecting piece and the sealing piece, and oil leakage is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of oil chromatograph installation, in particular to an oil extraction universal valve device for transformer oil chromatograph. Background Technique

[0002] The transformer is one of the important operating equipment in the power system. The on-line monitoring device for dissolved gases in oil is a device that can effectively monitor the operating state of the transformer and give early warning of possible faults. It is widely used in substations above 110 kV. Due to the long operation years of some substation transformers, the stability of the transformer gradually decreases with the increase of operation time. Therefore, it is urgent to install an on-line oil chromatograph to analyze the content of dissolved gases in oil in real time and judge the operating condition of the transformer.

[0003] Basically, the transformers produced ten years ago are not equipped with on-line monitoring ports for oil chromatograph. The only method is to transform the off-line oil extraction port of the main body into a three-way oil extraction port to meet the requirements of on-line monitoring oil extraction and off-line oil extraction at the same time. Off-line oil extraction is carried out by a syringe. Therefore, not only the connection space between the syringe and the off-line oil extraction port should be reserved, but also the direction of the oil extraction port should be downward to prevent oil leakage or the situation that oil cannot enter the syringe during the oil extraction process.

[0004] In the prior art, most of the three-way valves used for the transformation of the off-line oil extraction port are customized oil extraction ports with fixed directions and cannot adjust the direction. The final position of the thread rotation is the position of the off-line oil extraction port. After rotation, it is found that in many cases, the off-line port faces upward, sideways or has a baffle, and the syringe cannot reach in for oil extraction. Some merchants carry out universal transformation on the three-way valve, but most of the transformed three-way valves will have excessive leakage due to too many connecting parts or the operation during the installation process is too complex and cumbersome, etc.

[0005] In view of this, it is necessary to provide an oil extraction universal valve device for transformer oil chromatograph to solve or at least alleviate the above defects. Content of the Utility Model

[0006] The main purpose of the utility model is to provide an oil extraction universal valve device for transformer oil chromatograph to solve the problem that the position of the off-line oil extraction port in the prior art cannot be freely adjusted.

[0007] To achieve the above purpose, the utility model provides an oil extraction universal valve device for transformer oil chromatograph, which includes a connecting piece, a spherical oil extraction pipe, a sealing member and a valve mechanism; wherein,

[0008] The first end of the connecting piece is used to connect with the transformer oil extraction port, the sealing member is sleeved on the second end of the connecting piece, the connecting piece has an oil passing channel inside, and the sealing member has an installation channel for the spherical oil extraction pipe to penetrate through inside;

[0009] There is a spherical space between the oil-passing channel and the installation channel. The spherical oil intake pipe includes a spherical end and a connecting end. The spherical end is communicated with the oil-passing channel and rotatably connected in the spherical space, and the connecting end penetrates and extends out of the installation channel;

[0010] The valve mechanism is arranged to be switchable. The connecting end is connected to the first end of the valve mechanism and extends into the valve mechanism, and the second end of the valve mechanism is used to connect to the oil intake port of the three-way valve.

[0011] Preferably, the second end of the connecting piece is recessed inward to form a first hemispherical groove communicated with the oil-passing channel, and the inside of the sealing piece is recessed inward to form a second hemispherical groove communicated with the installation channel. The first hemispherical groove and the second hemispherical groove enclose the spherical space.

[0012] Preferably, the sealing piece is in a U shape with an opening facing the connecting piece. The second end of the connecting piece is connected inside the opening end of the sealing piece, and the other end of the sealing piece abuts against the first end of the valve mechanism.

[0013] Preferably, the connecting end of the spherical oil intake pipe is provided with a first external thread, and the first end of the valve mechanism is provided with a first internal thread that matches the first external thread. The connecting end of the spherical oil intake pipe is threadedly connected to the first end of the valve mechanism.

[0014] Preferably, the second end of the connecting piece is provided with a second external thread, and the opening end of the sealing piece is provided with a second internal thread that matches the second external thread. The second end of the connecting piece is threadedly connected to the opening end of the sealing piece.

[0015] Preferably, it further includes a polytetrafluoroethylene sealing layer. The polytetrafluoroethylene sealing layer is provided between the spherical end of the spherical oil intake pipe and the first hemispherical groove, and between the spherical end of the spherical oil intake pipe and the second hemispherical groove.

[0016] Preferably, it further includes an oil-proof sealing gasket. The oil-proof sealing gasket is provided between the first end of the connecting piece and the transformer body, between the second end of the connecting piece and the opening end of the sealing piece, and between the other end of the sealing piece and the first end of the valve mechanism.

[0017] Preferably, the valve mechanism is a sampling ball valve.

[0018] Preferably, the spherical oil intake pipe is made of stainless steel.

[0019] Preferably, the first end of the connecting piece is threadedly connected to the oil intake port of the transformer.

[0020] Compared with the prior art, the utility model provided has the following beneficial effects:

[0021] A universal oil extraction valve device for transformer oil chromatography provided by the utility model includes a connecting piece, a spherical oil extraction pipe, a sealing member and a valve mechanism. The first end of the connecting piece is used to connect with the transformer oil extraction port. The sealing member is sleeved on the second end of the connecting piece. An oil passage is provided inside the connecting piece. An installation passage for the spherical oil extraction pipe to penetrate through is provided inside the sealing member. A spherical space is provided between the oil passage and the installation passage. The spherical oil extraction pipe includes a spherical end and a connecting end. The spherical end is communicated with the oil passage and rotatably connected in the spherical space. The connecting end penetrates through and extends out of the installation passage. The valve mechanism is provided in a switchable manner. The connecting end is connected to the first end of the valve mechanism and extends into the valve mechanism. The second end of the valve mechanism is used to connect with the oil extraction port of the three-way valve. After being connected in this way, if the off-line oil extraction port of the three-way valve oil extraction port faces upward or the side is not convenient for the syringe to extend in, it can be adjusted by itself through the rotatable adjustment feature of the spherical oil extraction pipe, and the degree of freedom of direction adjustment is relatively high. The whole device is simple to assemble during installation, and has good sealing performance under the combination of the connecting piece and the sealing member, preventing oil leakage. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 It is a schematic diagram of the application scenario of the overall structure in an embodiment of the present utility model;

[0024] Figure 2 It is an exploded schematic diagram of the connecting piece, the spherical oil extraction pipe, and the sealing member before assembly in an embodiment of the present utility model;

[0025] Figure 3 It is a schematic diagram of the connecting piece and the sealing member after assembly in an embodiment of the present utility model;

[0026] Figure 4 It is a schematic diagram of the valve mechanism and the oil extraction port of the three-way valve after assembly in an embodiment of the present utility model.

[0027] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described with reference to the embodiments and the drawings.

[0028] Explanation of the reference numerals in the drawings:

[0029] 10. Connector; 110. Oil passage; 120. Spherical space; 130. First hemispherical groove; 140. Second external thread; 150. Oil-proof gasket; 20. Spherical oil extraction pipe; 210. Spherical end; 211. Polytetrafluoroethylene sealing layer; 220. Connection end; 230. First external thread; 30. Sealing member; 310. Installation passage; 320. Second hemispherical groove; 330. Second internal thread; 40. Valve mechanism; 410. First internal thread; 50. Oil extraction port of three-way valve. Detailed implementation manners

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0034] Please refer to the attached Figures 1-4, an oil sampling universal valve device for transformer oil chromatography provided by an embodiment of the present utility model includes a connecting member 10, a spherical oil sampling pipe 20, a sealing member 30 and a valve mechanism 40. First of all, it should be noted that different from most of the three-way valves used in the transformation of off-line oil sampling ports in the prior art, which are custom-made fixed-direction oil sampling ports and cannot adjust the direction, the final position of the threaded rotation is the position of the off-line oil sampling port. After rotation, it is found that in many cases, the off-line port faces upward, sideways or is blocked by a baffle, and the syringe cannot reach in for oil sampling. Some merchants perform a universal transformation on the three-way valve, but most of the transformed three-way valves will have excessive leakage due to too many connecting members 10 or the operation during the installation process is too complex and cumbersome. The present application solves the above defects in the prior art by providing an oil sampling universal valve device for transformer oil chromatography, specifically as follows:

[0035] The first end of the connecting member 10 is used to connect with the transformer oil sampling port. The sealing member 30 is sleeved on the second end of the connecting member 10. The connecting member 10 has an oil passage 110 inside. The sealing member 30 has an installation passage 310 for the spherical oil sampling pipe 20 to penetrate through. There is a spherical space 120 between the oil passage 110 and the installation passage 310. The spherical oil sampling pipe 20 includes a spherical end 210 and a connecting end 220. The spherical end 210 is communicated with the oil passage 110 and is rotatably connected in the spherical space 120. The connecting end 220 penetrates and extends out of the installation passage 310. The valve mechanism 40 is provided in a switchable manner. The connecting end 220 is connected to the first end of the valve mechanism 40 and extends into the valve mechanism 40. The second end of the valve mechanism 40 is used to connect with the three-way valve oil sampling port 50.

[0036] Specifically, the oil sampling universal valve device for transformer oil chromatography in the present application includes a connecting member 10, a spherical oil sampling pipe 20, a sealing member 30 and a valve mechanism 40. The connecting member 10 is used to be installed on the transformer oil sampling port and at the same time for the installation of the spherical oil sampling pipe 20, so that the oil in the transformer oil sampling port can flow into the spherical oil sampling pipe 20 through the connecting member 10. Therefore, an oil passage 110 needs to be opened in the connecting member 10 to make the spherical oil sampling pipe 20 communicate with the oil passage 110. Then, the oil is transmitted to the three-way valve oil sampling port 50 through the spherical oil sampling pipe 20. The three-way valve oil sampling port 50 is a three-way valve pipe formed by combining an on-line oil sampling port and an off-line oil sampling port. Considering the convenience of the oil sampling process, the valve mechanism 40 can be added here to control the on-off of the oil sampling process, so as to facilitate the opening and closing of the valve mechanism 40 according to the actual situation. Preferably, the valve mechanism 40 can adopt a sampling ball valve, which has the advantages of convenient opening and closing and small internal fluid flow resistance. The sealing member 30 is used to seal the spherical oil sampling pipe 20 to avoid oil leakage and at the same time can fix and limit the axial movement of the spherical oil sampling pipe 20.

[0037] Among them, the 30 sets of seals are sleeved on the second end of the connector 10. For the spherical oil extraction pipe 20 to penetrate conveniently, an installation channel 310 is opened inside the seal 30. In this way, after the spherical oil extraction pipe 20 penetrates the installation channel 310, a structural form is formed in which the seal 30 wraps the spherical oil extraction pipe 20 to improve the sealing performance and avoid oil extraction leakage. Since the spherical oil extraction pipe 20 in this application refers to a form with one end being spherical and the other end being round tubular, a spherical space 120 is formed between the oil passage 110 and the installation channel 310. This spherical space 120 can rotatably install the spherical end 210 of the spherical oil extraction pipe 20 therein. Thus, after the connection end 220 of the spherical oil extraction pipe 20 and the valve mechanism 40 are fixed (the valve mechanism 40 and the on-line oil extraction port of the three-way valve oil extraction port 50 are fixed), by rotating the angle of the spherical oil extraction pipe 20 along the cross-section of the device (the plane perpendicular to the axis of the oil extraction pipe), the orientation of the off-line oil extraction port of the three-way valve oil extraction port 50 can be adjusted to facilitate the syringe to extend for oil extraction.

[0038] As a preferred embodiment of the present utility model, the second end of the connector 10 is recessed inward to form a first hemispherical groove 130 communicated with the oil passage 110. The inside of the seal 30 is recessed inward to form a second hemispherical groove 320 communicated with the installation channel 310. The first hemispherical groove 130 and the second hemispherical groove 320 enclose the spherical space 120.

[0039] It should be noted that the first hemispherical groove 130 is used for rotatably installing and connecting the spherical end 210 of the spherical oil extraction pipe 20, and the second hemispherical groove 320 is used to limit the spherical end 210 of the spherical oil extraction pipe 20, so that the spherical end 210 is arranged in the spherical space 120 enclosed by the first hemispherical groove 130 and the second hemispherical groove 320. In this way, under the limitation of the second hemispherical groove 320, the spherical oil extraction pipe 20 can be restricted from moving along the axial direction, so that the rotation direction is maintained along the cross-section of the device.

[0040] As a relatively preferred embodiment of the present utility model, the seal 30 is in a U-shaped form with an opening facing the connector 10. The second end of the connector 10 is connected inside the open end of the seal 30, and the other end of the seal 30 abuts against the first end of the valve mechanism 40.

[0041] It should be noted that the U-shaped structure enables the opening part to be used for the second end of the connecting member 10 to extend in for installation and connection, while the remaining part can play a role in covering to achieve a sealing effect. It can be understood that when the connecting end 220 of the spherical oil extraction pipe 20 extends into the first end of the valve mechanism 40 and is stably connected, the other end of the seal 30 abuts against the first end of the valve mechanism 40 to ensure that the first end of the valve mechanism 40 forms an abutting and sealing effect except for the inserted spherical oil extraction pipe 20.

[0042] As a preferred embodiment of the present utility model, the connecting end 220 of the spherical oil extraction pipe 20 is provided with a first external thread 230, and the first end of the valve mechanism 40 is provided with a first internal thread 410 that is matched with the first external thread 230, and the connecting end 220 of the spherical oil extraction pipe 20 is threadedly connected to the first end of the valve mechanism 40.

[0043] It is worth noting that the connecting end 220 of the spherical oil extraction pipe 20 and the first end of the valve mechanism 40 are connected by threading, which is convenient for disassembly and assembly and has stable connection.

[0044] As a preferred embodiment of the present utility model, the second end of the connecting member 10 is provided with a second external thread 140, and the opening end of the seal 30 is provided with a second internal thread 330 that is matched with the second external thread 140, and the second end of the connecting member 10 is threadedly connected to the opening end of the seal 30.

[0045] It should be noted that similar to the connection of the spherical oil extraction pipe 20, the second end of the connecting member 10 and the opening end of the seal 30 are connected by threading, which is convenient for disassembly and assembly. After the spherical oil extraction pipe 20 abuts and is connected to the first hemispherical groove 130, the seal 30 can be taken through the spherical oil extraction pipe 20 and screwed tightly onto the second end of the connecting member 10, so that the spherical end 210 of the spherical oil extraction pipe 20 is rotatably arranged in the spherical space 120; similarly, the first end of the connecting member 10 can also be threadedly connected to the transformer oil extraction port. In this way, the entire device is assembled by threading during assembly, which is very convenient and stable.

[0046] Furthermore, it further includes a polytetrafluoroethylene sealing layer 211, and the polytetrafluoroethylene sealing layer 211 is provided between the spherical end 210 of the spherical oil extraction pipe 20 and the first hemispherical groove 130, and between the spherical end 210 of the spherical oil extraction pipe 20 and the second hemispherical groove 320.

[0047] It should be noted that, in order to ensure the rotatability of the spherical oil intake pipe 20, there will be a certain gap between the spherical end 210 of the spherical oil intake pipe 20 and the first hemispherical groove 130 and the second hemispherical groove 320 in the spherical space 120 respectively. Therefore, in order to prevent oil leakage while ensuring rotatability, the polytetrafluoroethylene sealing layer 211 can be added. It has a low coefficient of friction, which can make the spherical end 210 of the spherical oil intake pipe 20 still have good sealing performance while maintaining convenient rotation.

[0048] Furthermore, it further includes an oil-proof gasket 150. The oil-proof gasket 150 is provided between the first end of the connecting member 10 and the transformer body, between the second end of the connecting member 10 and the open end of the sealing member 30, and between the other end of the sealing member 30 and the first end of the valve mechanism 40.

[0049] It should be understood that the oil-proof gasket 150 is used to prevent oil leakage at the channel interface. Therefore, the oil-proof gasket 150 is provided at several channel joints. The oil-proof gasket 150 can be made of silicone rubber, fluororubber, etc., and those skilled in the art can select according to actual needs.

[0050] Furthermore, the spherical oil intake pipe 20 is made of stainless steel.

[0051] It should be noted that the stainless steel material has the advantages of not being easily adsorbed with oil stains, good corrosion resistance, and high service life.

[0052] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An oil sampling universal valve device for transformer oil chromatography, characterized in that It includes a connecting piece, a spherical oil extraction pipe, a sealing member and a valve mechanism; among them, The first end of the connecting piece is used to connect with the oil extraction port of the transformer. The sealing member is sleeved on the second end of the connecting piece. The interior of the connecting piece has an oil passage, and the interior of the sealing member has an installation passage through which the spherical oil extraction pipe penetrates; There is a spherical space between the oil passage and the installation passage. The spherical oil extraction pipe includes a spherical end and a connecting end. The spherical end is communicated with the oil passage and is rotatably connected in the spherical space. The connecting end penetrates and extends out of the installation passage; The valve mechanism is disposed in a switchable manner. The connecting end is connected to the first end of the valve mechanism and extends into the valve mechanism. The second end of the valve mechanism is used to connect with the oil extraction port of the three-way valve.

2. The oil sampling universal valve device for transformer oil chromatography according to claim 1, wherein The second end of the connecting piece is recessed inward to form a first hemispherical groove communicated with the oil passage. The interior of the sealing member is recessed inward to form a second hemispherical groove communicated with the installation passage. The first hemispherical groove and the second hemispherical groove enclose the spherical space.

3. The oil sampling universal valve device for transformer oil chromatography according to claim 1, characterized in that, The sealing member is in an inverted U shape with an opening facing the connecting piece. The second end of the connecting piece is connected inside the opening end of the sealing member. The other end of the sealing member abuts against the first end of the valve mechanism.

4. The oil sampling universal valve device for transformer oil chromatography according to claim 3, characterized in that, The connecting end of the spherical oil extraction pipe is provided with a first external thread. The first end of the valve mechanism is provided with a first internal thread matching the first external thread. The connecting end of the spherical oil extraction pipe is threadedly connected to the first end of the valve mechanism.

5. The oil sampling universal valve device for transformer oil chromatography according to claim 4, characterized in that, The second end of the connecting piece is provided with a second external thread. The opening end of the sealing member is provided with a second internal thread matching the second external thread. The second end of the connecting piece is threadedly connected to the opening end of the sealing member.

6. The oil sampling universal valve device for transformer oil chromatography according to claim 2, wherein, It further includes a polytetrafluoroethylene sealing layer. The polytetrafluoroethylene sealing layer is provided between the spherical end of the spherical oil extraction pipe and the first hemispherical groove, and between the spherical end of the spherical oil extraction pipe and the second hemispherical groove.

7. The oil sampling universal valve device for transformer oil chromatography according to claim 3, characterized in that, It further includes an oil-proof gasket. The oil-proof gasket is provided between the first end of the connecting piece and the transformer body, between the second end of the connecting piece and the opening end of the sealing member, and between the other end of the sealing member and the first end of the valve mechanism.

8. The oil sampling universal valve device for transformer oil chromatography according to claim 1, characterized in that, The valve mechanism is a sampling ball valve.

9. The oil sampling universal valve device for transformer oil chromatography according to claim 1, characterized in that, The spherical oil extraction pipe is made of stainless steel.

10. The oil sampling universal valve device for transformer oil chromatography according to claim 1, characterized in that, The first end of the connecting piece is threadedly connected to the oil extraction port of the transformer.

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