CN220251447U - Transformer oil sampling device - Google Patents

Abstract

The application provides a transformer oil sampling device relates to transformer technical field. This transformer oil sampling device, including coupling assembling, lead oily subassembly, blowdown subassembly and sampling subassembly, coupling assembling is including interior oil pipe and outer oil pipe that leads, interior oil pipe cover is established in outer oil pipe and is led oil pipe and pass through umbrella skirt form oil-out intercommunication with outer, it includes three-way valve and leads oil pipe to lead oil pipe, three-way valve first end is through leading oil pipe and outer oil pipe intercommunication, three-way valve second end and blowdown subassembly intercommunication, three-way valve third end and sampling subassembly intercommunication, coupling assembling still includes first elastic component, screw cavity and fastening ring, screw the cavity setting and offered the through hole in fastening ring top and bottom, drive outer oil pipe and interior oil pipe and to screw the cavity removal and through the oil drain hole intercommunication of through hole and transformer oil drain valve when first elastic component is compressed. The oil drain hole of interior oil guide pipe and transformer oil drain valve of this application can be realized and closely communicates, avoids sample oil and external environment contact.

Description

Transformer oil sampling device

Technical Field

The application relates to the technical field of transformers, in particular to a transformer oil sampling device.

Background

According to the requirements of the operation regulations of electrical equipment, the operating transformer needs to be regularly overhauled and the transformer oil is sampled and tested, the indexes such as the density, the water content and the acid value of the transformer oil are detected, according to the regulations of the sampling method of the oil for electric power (transformer oil and turbine oil), the full sealing is ensured in the sampling process, the dissolved water and the gas in the oil cannot escape, and the air bubbles and other pollutants cannot be mixed, otherwise, the test result is greatly influenced, and the requirements on the sampling equipment and the sampling skill are extremely high.

In the prior art, the oil taking hole of the transformer oil sampling device and the oil discharging hole of the transformer oil discharging valve are sealed and sampled through wrapping type sleeve joint, namely, the oil discharging guide pipe where the oil discharging hole is positioned is completely wrapped by a movable joint (generally a nut structure) and forms a sealing space.

However, the existing sampling mode realizes that the transformer oil sampling device is in sealing sleeve joint with the oil drain valve, but increases the contact area between the sample oil and the external environment. Although the sampling device and the oil drain valve are cleaned before the transformer oil is sampled, dirt at the thread gap of the oil drain pipe and dirt at the internal thread gap (i.e. in the thread) of the sealing nut structure are difficult to completely remove, so that the sample oil is easy to pollute, and the accuracy of the test result is seriously affected.

Disclosure of Invention

The application provides a transformer oil sampling device can with the oil drain hole direct communication of transformer oil drain valve, reduces appearance oil and external environment contact, guarantees transformer oil detection test's accuracy.

The application provides a transformer oil sampling device, including coupling assembling, lead oily subassembly, blowdown subassembly and sampling assembly.

The connecting assembly comprises an inner oil guide pipe and an outer oil guide pipe, the inner oil guide pipe is sleeved in the outer oil guide pipe and is communicated with the outer oil guide pipe through an umbrella skirt-shaped oil outlet, the oil guide assembly comprises an oil guide pipe and a three-way valve, the first end of the three-way valve is communicated with the outer oil guide pipe through the oil guide pipe, the second end of the three-way valve is communicated with the sewage disposal assembly, the third end of the three-way valve is communicated with the sampling assembly, and the sampling assembly is used for extracting sample oil in the transformer.

The connecting assembly further comprises a first elastic piece, a screwing cavity and a fastening ring, wherein the outer oil guide pipe is provided with a limiting piece, the first elastic piece is arranged on the limiting piece and sleeved on the outer oil guide pipe, and the screwing cavity is arranged above the fastening ring and the bottom end of the screwing cavity is provided with a through hole.

The first elastic piece drives the outer oil guide pipe and the inner oil guide pipe to move towards the screwing cavity when being compressed, and the outer oil guide pipe and the inner oil guide pipe enter the fastening ring through the through holes so that the inner oil guide pipe is communicated with the oil drain hole of the transformer oil drain valve.

In one possible implementation, the outer oil conduit is provided with a screw nut, the first elastic member is located between the screw nut and the limiting member, the screw cavity is provided with a thread matched with the screw nut, and the screw nut is configured to be connected with the screw cavity to compress the first elastic member.

In one possible implementation manner, the transformer oil sampling device provided by the application comprises a fastening ring body and at least two fixing teeth arranged in the ring body, wherein the ring body is used for placing a transformer oil drain valve, and the fixing teeth are used for being abutted with the lower part of the transformer oil drain valve so as to clamp the transformer oil drain valve together with the inner oil guide pipe.

In one possible implementation, the transformer oil sampling device provided herein, the oil guiding assembly further comprises a check valve disposed between the oil guiding tube and the three-way valve to prevent backflow of the sample oil into the connection assembly.

In one possible implementation manner, the transformer oil sampling device that this application provided, blowdown subassembly include the blowdown casing, have the blowdown cavity in the blowdown casing, and the opposite both sides are equipped with the oil feed pipe and the oil outlet pipe with blowdown cavity intercommunication on the blowdown casing, and the oil feed pipe is connected with the second end of three-way valve, and the blowdown cavity is used for accepting transformer sample waste oil.

In one possible implementation manner, the transformer oil sampling device that this application provided, blowdown subassembly still include second elastic component and stop the piece, and the second elastic component sets up in the blowdown cavity and bottom and oil outlet pipe butt, stop the piece setting at second elastic component top and with advance oil pipe butt, stop the piece and be used for shutoff advance oil pipe when sampling the subassembly sampling oil.

In one possible implementation, the transformer oil sampling device provided herein, the second elastic member is a spring.

In one possible implementation manner, the transformer oil sampling device provided by the application is provided, the stop piece is in a spherical shape, and the diameter of the stop piece is larger than the diameter of the oil inlet pipe.

In one possible implementation, the transformer oil sampling device that this application provided, sampling assembly include sampling tube and sampling syringe, and sampling syringe includes scale drum, core bar and piston, and piston connection is established in the scale drum on the core bar and cover, and sampling tube and scale drum intercommunication, sampling syringe are used for drawing sample oil.

In one possible implementation manner, the transformer oil sampling device provided by the application has at least one end of an inner oil guide pipe, an outer oil guide pipe, an oil guide pipe, a check valve and a three-way valve in an umbrella shape.

The application provides a transformer oil sampling device through setting up coupling assembling, lead oily subassembly, blowdown subassembly and sampling assembly, when needs sampling oil, coupling assembling can with the oil drain hole direct communication of transformer oil drain valve, reduces appearance oil and external environment contact. The connecting assembly comprises an inner oil guide pipe and an outer oil guide pipe, the inner oil guide pipe is sleeved in the outer oil guide pipe and is communicated with the outer oil guide pipe through an umbrella-shaped oil outlet, the oil guide assembly comprises an oil guide pipe and a three-way valve, the first end of the three-way valve is communicated with the outer oil guide pipe through the oil guide pipe, the second end of the three-way valve is communicated with the sewage disposal assembly, the third end of the three-way valve is communicated with the sampling assembly, the connecting assembly further comprises a first elastic part, a screwing cavity and a fastening ring, the outer oil guide pipe is provided with a limiting part, the first elastic part is arranged on the limiting part and sleeved on the outer oil guide pipe, the screwing cavity is arranged above the fastening ring, the bottom end of the fastening cavity is provided with a through hole, the first elastic part drives the outer oil guide pipe and the inner oil guide pipe to move towards the screwing cavity and penetrates through the through hole, the inner oil guide pipe is tightly communicated with an oil drain hole of the transformer oil drain valve, the sample oil is prevented from contacting with the external environment, and the accuracy of a transformer oil detection test is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a transformer oil drain valve;

FIG. 2 is a schematic structural diagram of a transformer oil sampling device according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of the connection assembly of FIG. 1;

FIG. 4 is a view of the connection assembly of FIG. 2 in use;

FIG. 5 is a schematic view of the fastening ring and the tightening cavity of FIG. 2;

FIG. 6 is a schematic diagram of a drain assembly of a transformer oil sampling device according to an embodiment of the present disclosure;

FIG. 7 is a cross-sectional view taken along the direction A-A in FIG. 6;

FIG. 8 is a schematic diagram of a sampling assembly of a transformer oil sampling device according to an embodiment of the present disclosure;

fig. 9 is a usage state diagram of a transformer oil sampling device according to an embodiment of the present application.

Reference numerals illustrate:

100-transformer oil sampling device;

110-a connection assembly;

111-an inner oil guide pipe; 112-an outer oil conduit; 113-a first elastic member; 114-screwing the cavity; 115-fastening ring;

111 A-An inner oil guide tube umbrella skirt-shaped oil outlet; 111 b-an inner oil conduit umbrella skirt oil inlet; 112 A-An outer oil conduit umbrella skirt oil outlet;

1121—a limiting member;

114 A-A through hole; 1141-screwing a nut;

1151-fixed teeth; 1152-ring body;

120-an oil guiding assembly;

121-an oil guide pipe; 122-check valve; 123-three-way valve

130-a blowdown assembly;

131-a sewage disposal housing; 132-a second elastic member; 133-a stop;

1311-a blowdown cavity;

131 A-An oil inlet pipe; 131 b-an oil outlet pipe;

140-sampling assembly

141-sampling syringe; 142-sampling tube;

1411-scale drum; 1412-pistons; 1413-core rod;

200-a transformer oil drain valve;

210-oil drain valve switch; 220-an oil drain conduit; 220 a-oil drain hole.

Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application. Those skilled in the art can adapt it as desired to suit a particular application.

Further, in the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may, for example, be fixedly connected, or indirectly connected through intermediaries, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be further noted, however, that in the description of the present application, the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

The box-type transformer (commonly referred to as 'box transformer') is designed in a box-type shell in a concentrated way, and has the advantages of small volume, light weight, low noise, low loss, high reliability and the like. According to the requirements of the operation regulations of electrical equipment, the operating box-type transformer needs to be regularly overhauled and transformer oil is sampled and tested, indexes such as density, water content, acid value and the like of the transformer oil are detected, according to the regulations of the sampling method of oil for electric power (transformer oil and turbine oil), the full sealing is ensured in the sampling process, the dissolved water and gas in the oil cannot escape, air bubbles and other pollutants cannot be mixed, otherwise, the test result is greatly influenced, and the requirements on the sampling equipment and the sampling skill are extremely high.

In the prior art, the oil taking hole of the transformer oil sampling device and the oil discharging hole of the transformer oil discharging valve are sealed and sampled through wrapping type sleeve joint, namely, the oil discharging guide pipe where the oil discharging hole is positioned is completely wrapped by a movable joint (generally a nut structure) and forms a sealing space.

However, the existing sampling mode realizes that the transformer oil sampling device is in sealing sleeve joint with the oil drain valve, but increases the contact area between the sample oil and the external environment. Although the sampling device and the oil drain valve are cleaned before the transformer oil is sampled, dirt at the thread gap of the oil drain pipe and dirt at the internal thread gap (i.e. in the thread) of the sealing nut structure are difficult to completely remove, so that the sample oil is easy to pollute and the accuracy of the test is seriously affected.

Based on this, this application provides a transformer oil sampling device, through setting up coupling assembling, lead oily subassembly, blowdown subassembly and sampling assembly, when needs extraction transformer oil appearance, coupling assembling can directly communicate with the oil drain hole of transformer oil drain valve, avoids appearance oil and external environment contact. The connecting assembly comprises an inner oil guide pipe and an outer oil guide pipe, the inner oil guide pipe is sleeved in the outer oil guide pipe and is communicated with the outer oil guide pipe through an umbrella-shaped oil outlet, the oil guide assembly comprises an oil guide pipe and a three-way valve, the first end of the three-way valve is communicated with the outer oil guide pipe through the oil guide pipe, the second end of the three-way valve is communicated with the sewage disposal assembly, the third end of the three-way valve is communicated with the sampling assembly, the connecting assembly further comprises a first elastic piece, a screwing cavity and a fastening ring, the outer oil guide pipe is provided with a limiting piece, the first elastic piece is arranged on the limiting piece and sleeved on the outer oil guide pipe, the screwing cavity is arranged above the fastening ring, the bottom end of the fastening cavity is provided with a through hole, the first elastic piece drives the outer oil guide pipe and the inner oil guide pipe to move towards the screwing cavity and penetrates through the through hole, the inner oil guide pipe is tightly communicated with an oil drain hole of the transformer oil drain valve, the sample oil is prevented from contacting with the external environment, and the accuracy of a transformer oil detection test is ensured.

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Referring to fig. 2 and 3, the transformer oil sampling device 100 provided in the present application includes a connection assembly 110, an oil guiding assembly 120, a pollution discharging assembly 130 and a sampling assembly 140.

The connecting assembly 110 comprises an inner oil guide pipe 111 and an outer oil guide pipe 112, the inner oil guide pipe 111 is sleeved in the outer oil guide pipe 112 and is communicated with the outer oil guide pipe 112 through an umbrella-shaped oil outlet 111a, the oil guide assembly 120 comprises an oil guide pipe 121 and a three-way valve 123, a first end of the three-way valve 123 is communicated with the outer oil guide pipe 112 through the oil guide pipe 121, a second end of the three-way valve 123 is communicated with the pollution discharge assembly 130, and a third end of the three-way valve 123 is communicated with the sampling assembly 140.

The connecting assembly 110 further comprises a first elastic member 113, a screwing cavity 114 and a fastening ring 115, wherein the outer oil guide pipe 112 is provided with a limiting member 1121, the first elastic member 113 is placed on the limiting member 1121 and sleeved on the outer oil guide pipe 112, the screwing cavity 114 is arranged above the fastening ring 115, and the bottom end of the screwing cavity 114 is provided with a through hole 114a.

Referring to fig. 4 and 5, when the first elastic member 113 is compressed, it drives the outer oil guide pipe 112 and the inner oil guide pipe 111 to move toward the screwing cavity 114, and the outer oil guide pipe 112 and the inner oil guide pipe 111 enter the fastening ring 115 through the through hole 114a and are used for communicating with the oil drain hole 220a of the transformer oil drain valve 200.

It should be noted that, referring to fig. 1, the transformer oil drain valve 200 includes an oil drain valve switch 210 and an oil drain pipe 220, the oil drain pipe 220 is provided with an oil drain hole 220a, when transformer oil is sampled, the oil drain valve switch 210 is unscrewed, transformer oil enters the transformer oil drain valve 200, and oil is taken through the oil drain hole 220a of the transformer oil drain valve 200, so as to perform a transformer oil detection test.

It should be further noted that, the outer oil conduit 112 is provided with a limiting member 1121, and the limiting member 1121 may be an annular supporting platform, where the diameter of the annular supporting platform is greater than the diameter of the through hole 114a, and the diameter of the outer oil conduit 112 is smaller than the diameter of the through hole 114a.

In addition, the first elastic member 113 may be a spring, and the kind and shape of the spring are not particularly limited.

Wherein, through setting up outer oil pipe umbrella skirt oil-out 112a, can realize with leading oil pipe 121 sealed intercommunication, through setting up interior oil pipe umbrella skirt oil-out 111a, can realize interior oil pipe 111 and outer oil pipe 112 sealed intercommunication, through setting up interior oil pipe umbrella skirt oil inlet 111b, can realize interior oil pipe 111 and oil drain hole 220a sealed intercommunication.

Specifically, the fastening ring 115 is passed through the oil drain pipe 220, the position of the fastening ring 115 is adjusted, the oil drain hole 220a is aligned with the through hole 114a, the outer oil guide pipe 112 and the inner oil guide pipe 111 are lowered towards the screwing cavity 114, the force generated by compression of the first elastic member 113 makes the outer oil guide pipe 112 and the inner oil guide pipe 111 move towards the screwing cavity 114 and pass through the through hole 114a to enter the fastening ring 115, and the diameter of the limiting member 1121 is larger than that of the through hole 114a, so that the bottom end of the limiting member 1121 is abutted against the upper surface of the through hole 114a, and the umbrella skirt-shaped oil inlet 111b of the inner oil guide pipe is tightly communicated with the oil drain hole 220a of the transformer oil drain valve 200.

In addition, referring to fig. 9, after the connection assembly 110 is connected to the transformer oil drain valve 200, the oil drain valve switch 210 is opened, and a quantitative transformer-like oil can be extracted by the sampling assembly 140 to perform a transformer oil detection test.

Through adopting above-mentioned technical scheme, lead oil pipe umbrella skirt oil inlet 111b and the oil drain hole 220a on the transformer oil drain valve 200 direct communication in, avoid appearance oil and external environment contact, guarantee the accuracy of detection test.

In some embodiments, the outer oil conduit 112 is provided with a screw cap 1141, the first elastic member 113 is located between the screw cap 1141 and the limiting member 1121, the screw cavity 114 is provided with threads cooperating with the screw cap 1141, and the screw cap 1141 is configured to compress the first elastic member 113 when connected to the screw cavity 114.

The screw nut 1141 and the first elastic member 113 are coaxially disposed on the outer oil pipe 112, and the screw nut 1141 and the first elastic member 113 may slide axially along the outer oil pipe 112.

By adopting the above technical scheme, when the screw cap 1141 is screwed with the screwing cavity 114, the first elastic member 113 is compressed, so that the first elastic member 113 generates a force towards the screwing cavity 114, thereby driving the outer oil guide pipe 112 and the inner oil guide pipe 111 to enter the fastening ring 115 from the through hole 114a, and enabling the umbrella skirt-shaped oil inlet 111b of the inner oil guide pipe to be tightly communicated with the oil drain hole 220a on the transformer oil drain valve 200.

In some embodiments, the fastening ring 115 includes a ring body 1152 and at least two fixing teeth 1151 disposed in the ring body 1152, wherein the ring body 1152 is used for placing the transformer oil drain valve 200, and the fixing teeth 1151 are disposed at an inner bottom of the ring body 1152 and abut against a lower portion of the transformer oil drain valve 200.

For example, referring to fig. 5, three fixing teeth 1151 are provided at the bottom end of the inner side of the ring body 1152, and the lower portion of the transformer oil drain valve 200 is clamped to the three fixing teeth 1151.

By arranging the fixed teeth 1151, the purpose of limiting the transformer oil drain valve 200 can be achieved

In some embodiments, referring to fig. 2, the oil guide assembly 120 further includes a check valve 122, the check valve 122 being configured to prevent the sample oil from flowing back into the connection assembly 110.

It should be noted that, both ends of the check valve 122 are communicated with the oil guide pipe 121 and the three-way valve 123 through umbrella skirt-shaped oil outlets, and the umbrella skirt-shaped oil outlets are similar to the outer oil guide pipe umbrella skirt-shaped oil outlets 112a in structure, and are not described in detail herein.

Further, when the transformer oil sampling device 100 needs to be washed, a certain amount of transformer oil is firstly extracted by the sampling assembly 140, and then the transformer oil flows from the connecting assembly 110 to the sampling assembly 140, and then the transformer oil is reversely injected into the oil guiding assembly 120 by the oil extracting assembly 140, so that the transformer oil cannot flow back into the connecting assembly 110 under the action of the non-return valve 122, and the waste oil after washing is prevented from polluting the connecting assembly 110.

In some embodiments, referring to fig. 6 and 7, the drain assembly 130 includes a drain housing 131, a drain cavity 1311 is formed in the drain housing 131, and an oil inlet pipe 131a and an oil outlet pipe 131b are disposed on opposite sides of the drain housing 131 and are communicated with the drain cavity 1311, and the drain cavity 1311 is used for receiving sampled waste oil.

Wherein the oil inlet pipe 131a is detachably connected to the second end of the three-way valve 123 through threads.

Through the above technical solution, when the transformer oil sampling device 100 is washed, waste oil can be collected in the blowdown cavity 1311, and when the waste oil is collected, the blowdown cavity 1311 can be detached, so that the waste oil can be cleaned conveniently.

In some embodiments, the drain assembly 130 further includes a second elastic member 132 and a stop member 133, the second elastic member 132 is disposed in the drain cavity 1311 and the bottom is abutted with the oil outlet pipe 131b, the stop member 133 is disposed on the top of the second elastic member 132 and is abutted with the oil inlet pipe 131a, and the stop member 133 is configured to block the oil inlet pipe 131a when extracting the transformer oil sample.

It should be noted that, when the transformer oil sampling device 100 is used to extract a transformer oil sample, the dissolved moisture and gas in the transformer oil sample cannot escape, and air bubbles and other pollutants cannot be mixed, otherwise, the test result will be greatly affected, so that the transformer oil sampling device 100 needs to be flushed first to ensure the accuracy of the test result.

Specifically, when the transformer oil sampling device 100 is washed, a certain amount of transformer oil is firstly extracted by the sampling assembly 140, and the flowing direction of the transformer oil is from the connecting assembly 110 to the sampling assembly 140, and the oil pressure is normal, so that the transformer oil cannot flow into the pollution discharge assembly 130 due to the abutting of the stop piece 133 and the oil inlet pipe 131 a; then, the transformer oil is reversely injected by the sampling assembly 140, and the transformer oil flows from the sampling assembly 140 to the oil guiding assembly 120, so that the oil pressure is increased, the pressure of the transformer oil to the stop member 133 is greater than the supporting force of the second elastic member 132 to the stop member 133, the waste oil enters from the oil inlet pipe 131a and pushes away the stop member 133, and the second elastic member 132 is compressed, so that the waste oil for flushing the transformer oil sampling device 100 enters into the sewage cavity 1311.

Through the above technical scheme, the opening or closing of the pollution discharge assembly 130 can be automatically controlled according to the oil pressure, when the transformer oil sampling device 100 is washed, the oil pressure is high, the waste oil pushes the stop piece 133 to leave the oil inlet pipe 131a, the pollution discharge assembly 130 is opened, and the waste oil enters the pollution discharge cavity 1311; when oil is sampled, the oil pressure is normal, the stop piece 133 is abutted to the oil inlet pipe 131a, the pollution discharge assembly 130 is closed, transformer oil cannot enter the pollution discharge cavity 1311, and meanwhile waste oil in the pollution discharge cavity 1311 can be prevented from being pumped out when transformer oil is sampled through the arrangement of the stop piece 133.

In some embodiments, the second elastic member 132 may be a spring.

Specifically, the spring can deform under the action of external force, and can recover after the external force is removed, so that the spring can be matched with the stop piece 133 to control the opening or closing of the sewage draining cavity 1311 according to the oil pressure, wherein the shape, the type and the like of the spring can be selected according to the oil pressure, and the shape and the type of the spring are not limited.

In some embodiments, the stopping member 133 has a spherical shape, and the diameter of the stopping member 133 is greater than that of the oil inlet pipe 131a.

For example, the blocking member 133 may be a hollow steel ball having a diameter larger than that of the oil inlet pipe 131a.

By setting the stop member 133 to a spherical shape, it is possible to achieve abutment with the oil inlet pipe 131a during oil extraction, preventing leakage of the oil sample.

In some embodiments, referring to fig. 2 and 8, the sampling assembly 140 includes a sampling tube 142 and a sampling syringe 141, the sampling syringe 141 includes a scale drum 1411, a core rod 1413, and a piston 1412, the piston 1412 is connected to the core rod 1413 and sleeved in the scale drum 1411, the sampling tube 142 is in communication with the scale drum 1411, and the sampling syringe 141 is used for extracting transformer-like oil.

It should be noted that, one end of the sampling tube 142 is communicated with the third end of the three-way valve 123 through a shed-shaped oil outlet, so as to ensure the tightness of the communication, and the shed-shaped oil outlet is similar to the inner oil guide tube shed-shaped oil outlet 111a in structure, which is not described in detail herein, and the other end of the sampling tube 142 is connected with the sampling syringe 141 through threads, so that the sampling syringe 141 is convenient to detach.

Through the above technical scheme, the purpose of extracting the transformer-like oil can be achieved, and the oil pressure is used for controlling the opening or closing of the pollution discharge assembly 130.

In some embodiments, at least one of inner oil conduit 111, outer oil conduit 112, oil conduit 121, non-return valve 122, three-way valve 123 is umbrella-shaped.

Specifically, referring to fig. 4, by way of example, by providing outer oil conduit umbrella skirt oil outlet 112a, sealed communication between outer oil conduit 112 and oil conduit 121 may be achieved.

In some embodiments, the oil guide assembly 120, the drain housing 131, and the sampling assembly 140 may be made of transparent high strength organic materials.

By using transparent materials, the transformer oil flow direction in the transformer oil sampling device 100 can be observed at any time, which is convenient for sampling, and may be, for example, transparent plastic, glass, etc.

To sum up, according to the transformer oil sampling device 100 provided by the present application, by setting the connection assembly 110, the oil guiding assembly 120, the pollution discharging assembly 130 and the sampling assembly 140, when the transformer oil sample needs to be extracted, the connection assembly 110 can be directly communicated with the oil drain hole 220a of the transformer oil drain valve 200. The connecting assembly 110 comprises an inner oil guide pipe 111 and an outer oil guide pipe 112, the inner oil guide pipe 111 is sleeved in the outer oil guide pipe 112 and is communicated with the outer oil guide pipe 112 through an umbrella-shaped oil outlet 111a, the oil guide assembly 120 comprises an oil guide pipe 121 and a three-way valve 123, a first end of the three-way valve 123 is communicated with the outer oil guide pipe 112 through the oil guide pipe 121, a second end of the three-way valve 123 is communicated with the pollution discharge assembly 130, a third end of the three-way valve 123 is communicated with the sampling assembly 140, the connecting assembly 110 further comprises a first elastic piece 113, a screwing cavity 114 and a fastening ring 115, a limiting piece 1121 is arranged on the outer oil guide pipe 112, the first elastic piece 113 is placed on the limiting piece 1121 and is sleeved on the outer oil guide pipe 112, the screwing cavity 114 is arranged above the fastening ring 115, a through hole 114a is formed in the bottom end of the screwing cavity 114, the first elastic piece 113 drives the outer oil guide pipe 112 and the inner oil guide pipe 111 to move towards the screwing cavity 114 and is communicated with an oil drain 220a of a transformer oil drain valve 200 in the fastening ring 115 through the through hole 114a, accordingly the inner oil guide pipe 220 b is communicated with the oil drain 220, the inner oil hole is achieved, the inner oil guide pipe 111 is closely communicated with the oil drain 220a and the oil well 220 is in the environment, the environment is prevented from being closely contacted with the environment, the detection result is ensured, and the detection result is accurately, and the environment is avoided.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application.

Thus far, the technical solution of the present application has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will be within the scope of the present application.

Claims (10)

1. The transformer oil sampling device is characterized by comprising a connecting component, an oil guiding component, a pollution discharging component and a sampling component;

the connecting assembly comprises an inner oil guide pipe and an outer oil guide pipe, the inner oil guide pipe is sleeved in the outer oil guide pipe and is communicated with the outer oil guide pipe through an umbrella skirt-shaped oil outlet, the oil guide assembly comprises an oil guide pipe and a three-way valve, a first end of the three-way valve is communicated with the outer oil guide pipe through the oil guide pipe, a second end of the three-way valve is communicated with the pollution discharge assembly, a third end of the three-way valve is communicated with the sampling assembly, and the sampling assembly is used for extracting sample oil in a transformer;

the connecting assembly further comprises a first elastic piece, a screwing cavity and a fastening ring, wherein the outer oil guide pipe is provided with a limiting piece, the first elastic piece is arranged on the limiting piece and sleeved on the outer oil guide pipe, the screwing cavity is arranged above the fastening ring, and the bottom end of the screwing cavity is provided with a through hole;

the first elastic piece drives the outer oil guide pipe and the inner oil guide pipe to move towards the screwing cavity when being compressed, and the outer oil guide pipe and the inner oil guide pipe enter the fastening ring through the through hole so that the inner oil guide pipe is communicated with an oil drain hole of the transformer oil drain valve.

2. The transformer oil sampling device of claim 1, wherein the outer oil conduit is provided with a screw cap, the first resilient member is located between the screw cap and the limiting member, the screw cavity is provided with threads cooperating with the screw cap, and the screw cap is configured to be coupled to the screw cavity to compress the first resilient member.

3. The transformer oil sampling device of claim 1, wherein the fastening ring comprises a ring body and at least two fixing teeth arranged in the ring body, the ring body is used for placing the transformer oil drain valve, and the fixing teeth are abutted with the lower part of the transformer oil drain valve so as to clamp the transformer oil drain valve together with the inner oil guide pipe.

4. A transformer oil sampling device according to any one of claims 1 to 3, wherein the oil guide assembly further comprises a non-return valve arranged between the oil guide tube and the three-way valve to prevent backflow of the sample oil into the connection assembly.

5. A transformer oil sampling device according to any one of claims 1 to 3, wherein the drain assembly comprises a drain housing having a drain cavity therein, and wherein opposite sides of the drain housing are provided with an inlet pipe and an outlet pipe in communication with the drain cavity, the inlet pipe being in communication with the second end of the three-way valve, the drain cavity being for receiving sampled waste oil from the transformer.

6. The transformer oil sampling device of claim 5, wherein the drain assembly further comprises a second elastic member and a stop member, the second elastic member is disposed in the drain cavity and has a bottom portion abutting the oil outlet pipe, the stop member is disposed at a top portion of the second elastic member and abuts the oil inlet pipe, and the stop member is used for sealing off the oil inlet pipe when the sampling assembly extracts the sample oil.

7. The transformer oil sampling device of claim 6, wherein the second resilient member is a spring.

8. The transformer oil sampling device of claim 6, wherein the stop member is spherical in shape and has a diameter greater than the diameter of the oil inlet tube.

9. The transformer oil sampling device of claim 1, wherein the sampling assembly comprises a sampling tube and a sampling injector, the sampling injector comprises a scale drum, a core rod and a piston, the piston is connected to the core rod and sleeved in the scale drum, the sampling tube is communicated with the scale drum, and the sampling injector is used for extracting the sample oil.

10. The transformer oil sampling device of claim 4, wherein at least one end of the inner oil conduit, the outer oil conduit, the non-return valve, the three-way valve is umbrella-shaped.