CN215981264U

CN215981264U - Universal SF6 inflation test joint

Info

Publication number: CN215981264U
Application number: CN202120888305.6U
Authority: CN
Inventors: 金鑫
Original assignee: Hubei University of Arts and Science
Current assignee: Hubei University of Arts and Science
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2022-03-08
Anticipated expiration: 2031-04-27

Abstract

The utility model discloses a universal SF6 inflation test joint which comprises a connecting pipe, wherein one end of the connecting pipe is an air source connecting end, the other end of the connecting pipe is a pipeline connecting end, the pipeline connecting end is connected with a contact groove, a sealing washer is arranged in the contact groove, a connecting and fastening assembly is arranged on the connecting pipe, and a joint thimble is further arranged in the connecting pipe. The novel butt joint device is simple in structure, convenient to use, capable of being in butt joint with SF6 equipment of various models, wide in application range, capable of improving working efficiency and capable of reducing working complexity.

Description

Universal SF6 inflation test joint

Technical Field

The utility model relates to the technical field of test and maintenance, in particular to a universal SF6 gas-filled test joint.

Background

Sulfur hexafluoride is a stable gas which is colorless, odorless, nontoxic and noncombustible, SF6 is a strong electronegative gas, molecules of the sulfur hexafluoride are easy to adsorb free electrons to form negative ions with large mass, and the collision ionization process in the gas is weakened, so that the sulfur hexafluoride has high electrical insulation strength which is about 2.5 times of the air insulation strength in a uniform electric field. Since SF6 gas has excellent arc extinguishing and insulating properties and good chemical stability, it was used as an arc extinguishing medium for high voltage circuit breakers since the end of the 50 th century. In the ultra-high voltage and extra-high voltage circuit breakers, SF6 has replaced oil as an arc extinguishing medium and has largely replaced compressed air. From the middle of the 60 s, SF6 is widely used as an insulation medium for high voltage electrical equipment. SF6 gas insulated, fully enclosed switchgear occupies a much smaller area than conventional open high voltage switchgear and its operation is not affected by external weather and environmental conditions, and thus has come into widespread use not only in ultra-high voltage and extra-high voltage power systems, but also in distribution networks (SF6 gas insulated switchgears and ring network power supply units). The SF6 gas insulated pipeline transmission line has the advantages of small medium loss and large transmission capacity, and can be used in high-drop occasions, thus being commonly used for outlet of hydropower stations to replace conventional oil-filled cables. SF6 gas-insulated transformers have the advantage of being fire and explosion proof, and are particularly suitable for use in densely populated areas and for supplying power to high-rise buildings.

At present, in the process of pre-testing or fault first-aid repair of power equipment such as an SF6 circuit breaker, a current transformer, a GI S air chamber and the like, work such as SF6 gas charging and discharging, SF6 gas humidity and decomposition product testing, SF6 density relay checking and the like is often carried out, the work needs to connect an air chamber with a pipeline connector (shown in figure 1) on testing equipment by using an inflation test connector, so that the communication purpose is achieved, the SF6 equipment is numerous in brand model, the model of the pipeline connector is also different, the inflation test connector corresponding to the size of the pipeline connector model needs to be frequently replaced in the working process, the corresponding inflation test connectors are also numerous, the application range is small, the working efficiency is reduced, and the working complexity is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a universal SF6 inflation test joint, which well solves the problems, has a simple structure, is convenient to use, can be used for butting SF6 equipment of various types, has a wide application range, improves the working efficiency and reduces the working complexity.

The technical scheme is that the universal SF6 inflation test joint comprises a connecting pipe, wherein one end of the connecting pipe is an air source connecting end, the other end of the connecting pipe is a pipeline connecting end, the pipeline connecting end is connected with a contact groove, a sealing washer is arranged in the contact groove, a connecting and fastening assembly is arranged on the connecting pipe, and a joint ejector pin is further arranged in the connecting pipe.

The utility model has the beneficial effects that:

1. the utility model designs a pass-type SF6 gas-filled test joint, which is butted with a pipeline joint through a contact groove, and simultaneously, the contact groove and the pipeline joint are sealed through a sealing washer, thereby ensuring the tightness of sealing, being suitable for pipeline joints with different pipe diameters and changing the problem that the existing test joint can only be butted with the same pipe diameter; the pipeline joints with different pipe diameters can be butted with the contact grooves and can be sealed by adopting the sealing gaskets, the middle parts of the pipeline joints and the connecting pipes can be communicated, SF6 equipment with various models can be butted, the application range is wide, the working efficiency is improved, and the working complexity is reduced;

2. adopt to connect fastening assembly with connecting tube and pipeline joint fixed connection, changed the current threaded connection's that passes through the looks adaptation mode, further realized the SF6 equipment of butt joint various models, application scope is wide, connects firmly.

Drawings

FIG. 1 is a schematic view of a pipe joint structure to be butted;

FIG. 2 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a third embodiment of the present invention;

in the figure: 01. a threaded joint 02 and a butt joint pipe; 03. an equipment thimble; 1. a connecting pipe; 2. an air source connecting end; 3. a pipeline connecting end; 4. a contact groove; 5. a sealing gasket; 6. a joint thimble; 7. connecting a screw rod; 8. a pipeline clamping piece; 9. fixing the rod; 10. a pipeline fixing screw rod; 11. a fixing hoop; 12. connecting a fixed bolt; 13. a connecting nut; 14. and a gas source pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", and the like refer to the orientation or position relationship based on the drawings or the orientation or position relationship that the utility model product is usually put in when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, a schematic diagram of a pipeline joint structure requiring butt joint includes a threaded joint 01, a butt joint pipe 02 is provided at a front end of the threaded joint 01, an equipment thimble 03 is provided in the butt joint pipe 02, and different inflation test joints are required to be butt-jointed with the threaded joint 01 due to different sizes.

The first embodiment is as follows: as shown in fig. 2, the utility model provides a general SF6 inflation test connector, which comprises a connecting pipe 1, wherein one end of the connecting pipe 1 is an air source connecting end 2, the other end of the connecting pipe 1 is a pipeline connecting end 3, the pipeline connecting end 3 is connected with a contact groove 4, a sealing washer 5 is arranged in the contact groove 4, a connecting and fastening assembly is arranged on the connecting pipe 1, and a connector thimble 6 is arranged in the connecting pipe 1.

When the device is used, the butt joint pipe 02 of the pipeline joint is aligned with the channel of the connecting pipe 1, then the butt joint pipe 02 is butted in the contact groove 4, the end part of the butt joint pipe 02 is tightly contacted with the sealing washer 5, and then the connecting pipe 1 and the pipeline joint are tightly connected through the connecting and fastening assembly, so that the butt joint pipe 02 and the connecting pipe 1 form a tight channel; at this time, the joint thimble 6 in the connecting pipe 1 pushes open the equipment thimble 03 in the butt joint pipe 02, so that the whole pipeline is communicated, and the butt joint is completed.

The connecting and fastening component is an external connecting piece, a threaded joint 01 on a pipeline joint is not adopted, the connecting structure of the connecting and fastening component is not limited by the pipeline joint needing to be connected, and the application range is improved. If the connecting screw 7 is adopted, one end of the connecting screw 7 is fixedly connected with the connecting pipe 1, the other end of the connecting screw 7 is sleeved with the pipeline clamping piece 8, and the pipeline clamping piece 8 is fixedly connected with the connecting screw 7 through the butterfly nut.

The utility model designs a pass-type SF6 gas-filled test joint, which is butted with a pipeline joint through a contact groove 4, and simultaneously, the contact groove 4 and the pipeline joint are sealed through a sealing washer 5, thereby ensuring the sealing tightness, being suitable for pipeline joints with different pipe diameters and changing the problem that the existing test joint can only be butted with the same pipe diameter; the pipeline joints with different pipe diameters can be butted with the contact grooves 4 and can be sealed by sealing gaskets 5, the pipeline joints can be communicated with the middle of the connecting pipe 1, SF6 equipment with various models can be butted, the application range is wide, the working efficiency is improved, and the working complexity is reduced; adopt to connect fastening assembly with connecting pipe 1 and pipeline joint fixed connection, changed the current threaded connection's that passes through the looks adaptation mode, further realized the SF6 equipment of various models of butt joint, application scope is wide, connects firmly.

Example two: as shown in fig. 3, the structure of the attachment fastener assembly of the first embodiment is changed. The connecting and fastening assembly comprises at least two fixing rods 9, one ends of the fixing rods are fixedly connected with the connecting pipe 1, and the other ends of the fixing rods 9 are connected with pipeline fixing screw rods 10 through butterfly nuts. One end of the pipeline fixing screw rod 10 is connected with the fixing rod 9 through a butterfly nut, and the other end of the pipeline fixing screw rod 10 is fixedly connected with a fixing hoop 11. The fixing hoop 11 is provided with a connecting and fixing bolt 12. The fixing rods 9 are uniformly distributed at both sides of the connecting pipe 1.

Namely, two fixed rods 9 are arranged at two sides of the connecting pipe 1, one end of each fixed rod 9 is fixedly connected with the connecting pipe 1, the other end of each fixed rod 9 is provided with a through hole, the axis of the through hole is the same as that of the pipeline fixed screw 10, one end of the pipeline fixed screw 10 passes through the through hole, the pipeline fixing screw rod can be fixedly connected with a fixing rod 9 through a butterfly nut, the other end of a pipeline fixing screw rod 10 is connected with a fixing hoop 11, the fixing hoop 11 is a semicircular hoop, the two fixing hoops 11 are connected through a connecting fixing bolt 12, the two fixing hoops 11 can be detached, when in use, two fixing hoops 11 are disassembled and sleeved at the end part of a threaded joint 01 of a pipeline joint to be butted, the two fixing hoops 11 are fixed on the pipeline joint through connecting and fixing bolts 12, then a butterfly nut is screwed, the end part of the butt joint pipe 02 of the pipeline joint can be tightly contacted with the sealing washer 5, so that the butt joint pipe 02 and the connecting pipe 1 form a tight channel; at this time, the joint thimble 6 in the connecting pipe 1 pushes open the equipment thimble 03 in the butt joint pipe 02, so that the whole pipeline is communicated, and the butt joint is completed.

Example three: as shown in fig. 4, the air supply connection end 2 of the connection pipe 1 is communicated with the air supply pipe 14 through the connection nut 13. A joint thimble 6 is arranged in the connecting pipe 1. The connecting nut 13 is sleeved on the connecting pipe 1 through threads, and one end of the joint thimble 6 is fixedly connected with the connecting nut 13.

Due to different lengths of the equipment thimbles 03 of part of special pipeline joints, the situation that the joint thimbles 6 cannot jack the equipment thimbles 03 after the pipeline joints are butted with the inflation test joint can be caused, or the equipment thimbles 03 are long, when the joint thimbles 6 jack the equipment thimbles 03, the butt joint of the pipeline joints and the inflation test joint is not completed, and the like. Therefore, the connector ejector pin 6 is arranged on the connecting nut 13, the connecting nut 13 is sleeved on the connecting pipe 1 through threads, the connecting nut 13 is screwed, the connecting nut 13 can move up and down on the connecting pipe 1, the connector ejector pin 6 can move up and down in the connecting pipe 1, the distance between the connector ejector pin 6 and the equipment ejector pin 03 is changed, and the connector ejector pins 6 can be ejected out by the equipment ejector pins 03 with different lengths. The pipeline joint and the inflation test joint of the utility model can be butted tightly firstly, and then the connecting nut 13 is screwed, so that the joint thimble 6 moves towards the equipment thimble 03, and the equipment thimble 03 is jacked open, so that the pipeline is communicated.

The utility model has simple structure, convenient use, wide application range, improved working efficiency and reduced working complexity, and can be butted with SF6 equipment of various types.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model.

Claims

1. A general type SF6 aerifys experimental joint which characterized in that: including connecting pipe (1), connecting pipe (1) one end is air supply link (2), connecting pipe (1) other end is pipeline link (3), pipeline link (3) are connected with contact groove (4), be provided with seal ring (5) in contact groove (4), be provided with on connecting pipe (1) and connect fastening components, still be provided with in connecting pipe (1) and connect thimble (6).

2. The universal SF6 gas charge test joint of claim 1, wherein: the connecting and fastening assembly comprises at least two fixing rods (9) with one ends fixedly connected with the connecting pipe (1), and the other ends of the fixing rods (9) are connected with pipeline fixing screw rods (10) through butterfly nuts.

3. The universal SF6 gas charge test joint of claim 2, wherein: one end of the pipeline fixing screw rod (10) is connected with the fixing rod (9) through a butterfly nut, and the other end of the pipeline fixing screw rod (10) is fixedly connected with a fixing hoop (11).

4. The universal SF6 gas charge test joint of claim 3, wherein: and the fixed hoop (11) is provided with a connecting and fixing bolt (12).

5. The universal SF6 gas charge test joint of claim 2, wherein: the fixing rods (9) are uniformly distributed around the connecting pipe (1).

6. The universal SF6 gas charge test joint of claim 1, wherein: and the air source connecting end (2) of the connecting pipe (1) is communicated with the air source pipe (14) through a connecting nut (13).

7. The universal SF6 gas charge test joint of claim 6, wherein: the connecting nut (13) is sleeved on the connecting pipe (1) through threads, and one end of the joint thimble (6) is fixedly connected with the connecting nut (13).