Three-phase common-box GIL right-angle unit

Abstract

The utility model provides a three-phase common-box GIL right-angle unit, and belongs to the technical field of power transmission equipment. Comprising straight shell bodies, the straight shell bodies are arranged at the two ends of a right-angle shell body respectively, the straight shell bodies are connected with the right-angle shell body through bolts, at least one end of the right-angle shell body is provided with a corrugated pipe compensator, the corrugated pipe compensator is located between the right-angle shell body and the straight shell bodies, and three fixed supporting assemblies are arranged at the positions, close to the two ends, in the right-angle shell body respectively. The fixed three-support assembly is fixedly connected with the right-angle shell, three groups of three-phase conductors which are distributed in a right-angle manner are distributed in the right-angle shell, the three-phase conductors respectively penetrate through the two groups of fixed three-support assemblies and are fixedly connected with the fixed three-support assemblies, and the sliding three-support assembly is arranged in the straight shell and is in sliding connection with the straight shell. According to the utility model, the corrugated pipe compensator is arranged, and the arrangement mode of the corrugated pipe compensator effectively absorbs deformation generated by thermal expansion and cold contraction of the right-angle shell, the straight-cylinder shell and the three-phase conductor.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission equipment, in particular to a three-phase common box GIL right-angle unit. Background Art

[0002] GIL equipment, namely Gas Insulated Transmission Lines, is a special type of power transmission equipment. It is mainly composed of a grounded alloy aluminum shell and a built-in tubular alloy aluminum conductor, using insulating gases such as sulfur hexafluoride as the medium. Due to its structural design and the use of materials, GIL equipment can carry a large current transmission and is particularly suitable for power transmission in harsh meteorological environments, or when corridor selection is limited. GIL equipment has a wide range of application scenarios, including but not limited to underground transformation of urban overhead lines, long-distance and large-capacity underground power transmission, and power supply in extreme environments. With the development of technology and the reduction of costs, GIL equipment is gradually becoming an important choice in the field of power transmission.

[0003] Due to the direction of the transmission line and the limitations of the on-site terrain, in actual use, it is usually necessary to arrange the GIL line at a right angle. In the current structure, the three-phase common box GIL equipment has a compact structural design, the conductor structure inside the right-angle shell is complex, and the assembly is inconvenient. Therefore, the present application provides a three-phase common box GIL right-angle unit and its components to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a three-phase common box GIL right-angle unit to solve the problems of compact structural design of existing three-phase common box GIL equipment, complex conductor structure inside the right-angle shell, and inconvenient assembly.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A three-phase common-box GIL right-angle unit comprises a straight-cylinder shell, a sliding three-support assembly, a fixed three-support assembly and a right-angle shell, wherein straight-cylinder shells are respectively provided at both ends of the right-angle shell, and the straight-cylinder shells are bolted to the right-angle shells; a bellows compensator is provided at at least one end of the right-angle shell, the bellows compensator is located between the right-angle shell and the straight-cylinder shell, and the bellows compensator is bolted to the right-angle shell and the straight-cylinder shell respectively; fixed three-support assemblies are respectively provided near both ends of the right-angle shell, and the fixed three-support assemblies are fixedly connected to the right-angle shell; three groups of three-phase conductors distributed at right angles are distributed inside the right-angle shell, and the three-phase conductors respectively pass through two groups of fixed three-support assemblies and are fixedly connected thereto; a sliding three-support assembly is provided inside the straight-cylinder shell, and the sliding three-support assembly is fixedly connected to the straight-cylinder shell, and the three-phase conductors pass through the sliding three-support assembly and are slidingly connected thereto.

[0007] Optionally, a pot-type insulator assembly is provided at one end of the right-angle shell away from the bellows compensator, and the pot-type insulator assembly is bolted to the right-angle shell. If bellows compensators are provided at both ends of the right-angle shell, the pot-type insulator assembly is arranged between the right-angle shell and the bellows compensator and is bolted to both of them respectively.

[0008] Optionally, a particle catcher is provided inside the pot-type insulator assembly, the particle catcher is fixedly connected to the pot-type insulator assembly, and the particle catcher is closely attached to the inner wall of the pot-type insulator assembly.

[0009] Optionally, a foreign object bin is fixedly installed on one side away from the fixed three-support assembly, a contact is embedded in one end of the foreign object bin, the contact is fixedly connected to the foreign object bin, a contact seat is fixedly connected to the other end of the foreign object bin, and a wear-resistant wire ring is fixedly connected to the inner wall of the foreign object bin away from the contact end.

[0010] Optionally, contacts and contact seats are fixedly connected at both ends of the three-phase conductor, and contacts and contact seats are fixedly connected at corresponding positions inside the bellows compensator and the pot-type insulator assembly, and the contacts are adapted to the contact seats.

[0011] Optionally, the contact at one end of the three-phase conductor is inserted into the contact seat in the pot-type insulator assembly and embeddedly connected thereto, the contact seat at the other end of the three-phase conductor is plug-in connected to the contact of the foreign object bin, the contact seat of the foreign object bin is plug-in connected to the contact of the bellows compensator, and the contact seat at one end of the three-phase conductor located in the straight cylindrical shell is plug-in connected to the contact seat of the bellows compensator.

[0012] Optionally, the fixed three-support assembly includes a particle catcher, which is a straight-cylindrical structure, with multiple groups of through holes evenly arranged on the surface of the particle catcher, and three support frames are arranged inside the particle catcher, which are fixedly connected to the particle catcher.

[0013] Optionally, three groups of wire holes are opened on the surface of the three support frames, and multiple groups of thread grooves are arranged on the side surfaces of the three support frames. The particle catcher is connected to the thread groove by a fixing bolt passing through the through hole.

[0014] Optionally, the three-phase conductor passes through the three support frames through the wire holes and is fixedly connected thereto.

[0015] Optionally, the sliding three-support assembly has the same structure as the fixed three-support assembly, and the three-phase conductor passes through the sliding three-support assembly through the wire hole and is slidably connected thereto.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] In the above scheme, the internal conductor structure and number are simplified by a specially designed 90° conductor, which is fixed to the three-support insulator by crimping, and contact seats are installed on both sides to facilitate the connection between the right-angle shell conductor and the straight-tube shell conductor. A foreign matter bin is provided at the connection between the contact and the contact seat to effectively limit the metal particles generated by the reciprocating friction between the contact and the contact seat, prevent the metal particles from floating inside the air chamber, and drift to the surface of the basin insulator and the three-support insulator under the action of the electric field force, which will have an adverse effect on the internal electric field of the GIL.

[0018] By providing a bellows compensator, the arrangement of the bellows compensator effectively absorbs the deformation caused by thermal expansion and contraction of the right-angle shell, the straight cylinder shell and the three-phase conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present invention and, together with the description, further serve to explain the principles of the present invention and enable those skilled in the relevant art to make and use the present invention.

[0020] Figure 1 It is a schematic diagram of the cutaway structure of the right-angle shell in the three-phase GIL right-angle unit;

[0021] Figure 2 It is a cross-sectional view of a three-phase GIL right-angle unit;

[0022] Figure 3 It is a schematic diagram of the structure of fixing three supporting components in the three-phase GIL right-angle unit;

[0023] Figure 4 It is a cross-sectional view of the foreign body compartment in the three-phase GIL right-angle unit;

[0024] Figure 5 It is a cross-sectional view of the pot-type insulator assembly in the three-phase GIL right-angle unit.

[0025] [reference numerals]

[0026] 1. Straight shell; 2. Bellows compensator; 3. Right-angle shell; 4. Fixed three-support assembly; 41. Particle catcher; 42. Three-support frame; 43. Fixing bolt; 5. Sliding three-support assembly; 6. Basin insulator assembly; 7. Foreign matter bin; 8. Three-phase conductor; 10. Contact; 11. Contact seat; 12. Wear-resistant guide ring.

[0027] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0028] The following is a detailed description of a three-phase common box GIL right angle unit provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0029] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0030] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0031] It is to be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0032] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0033] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a three-phase common box GIL right-angle unit, including a straight-cylinder shell 1, a sliding three-support assembly 5, a fixed three-support assembly 4 and a right-angle shell 3, wherein the two ends of the right-angle shell 3 are respectively provided with a straight-cylinder shell 1, the straight-cylinder shell 1 is bolted to the right-angle shell 3, at least one end of the right-angle shell 3 is provided with a bellows compensator 2, the bellows compensator 2 is located between the right-angle shell 3 and the straight-cylinder shell 1, and the bellows compensator 2 is bolted to the right-angle shell 3 and the straight-cylinder shell 1, respectively, the inside of the right-angle shell 3 is respectively provided with fixed three-support assemblies 4 near both ends, the fixed three-support assembly 4 is fixedly connected to the right-angle shell 3, the fixed three-support assembly 4 includes a particle catcher 41, and the particle catcher The particle catcher 41 is a straight cylinder structure, and a plurality of through holes are evenly arranged on the surface of the particle catcher 41. Three support frames 42 are arranged inside the particle catcher 4, and the three support frames 42 are fixedly connected to the particle catcher 41. Three groups of wire holes are arranged on the surface of the three support frames 42, and a plurality of thread grooves are arranged on the side of the three support frames 42. The particle catcher 41 is connected to the thread groove through the through hole by a fixing bolt 43, and the three-phase conductor 8 passes through the three support frames 42 through the wire holes and is fixedly connected to the three support frames 42. The three-phase conductor 8 in the right-angle shell 3 can be formed in one step by welding, or the three-phase conductor 8 can be processed by casting, and crimped together with the fixed three-support assembly 4, so as to support the three-phase conductor 8 and reduce the assembly workload of the three-phase conductor 8.

[0034] like Figure 2 and Figure 3 As shown, the bellows compensator 2 can compensate for the axial deformation of the right-angle shell 3 and the straight-cylinder shell 1, and absorb the axial deformation and stress of the shell and the conductor; two sets of fixed three-support assemblies 4 can fix the three-phase conductor 8 in the right-angle shell 3 to prevent it from moving and getting disordered. Fixed three-support assemblies 4 and sliding three-support assemblies 5 are respectively arranged on both sides of the bellows compensator 2, so that it is convenient to keep one end of the bellows compensator 2 fixed, and the position between the sliding three-support assembly 5 at the other end of the bellows compensator 2 and the three-phase conductor 8 can be adjusted according to the changes of the bellows compensator 2.

[0035] like Figure 2 and Figure 4As shown, three groups of three-phase conductors 8 distributed at right angles are distributed inside the right-angle housing 3, and the three-phase conductors 8 pass through two groups of fixed three-support components 4 respectively and are fixedly connected thereto, and contacts 10 and contact seats 11 are fixedly connected at both ends of the three-phase conductor 8, and contacts 10 and contact seats 11 are fixedly connected at corresponding positions inside the bellows compensator 2 and the basin-type insulator component 6, and the contacts 10 and contact seats 11 are adapted to each other, and a foreign matter bin 7 is fixedly installed on one side away from the fixed three-support component 4, and a contact 10 is embedded at one end of the foreign matter bin 7, and the contact 10 is fixedly connected to the foreign matter bin 7, and the other end of the foreign matter bin 7 is fixedly connected to the contact seat 11. 1. A wear-resistant wire ring is fixedly connected to the inner wall of the foreign object bin 7 away from the end of the contact 10. The wear-resistant wire ring can reduce the wear of the inner wall of the foreign object bin 7 when the contact 10 is connected to the contact seat 11, and guide the contact 10 to quickly connect with the contact seat 11. The foreign object bin 7 can move axially with the contact 10. When the contact 10 and the contact seat 11 rub against each other, the metal particles generated by the friction will fall into the foreign object bin 7 under the action of gravity and be confined in the foreign object bin 7, thereby preventing the metal particles from drifting into the air chamber. In addition, a wear-resistant guide ring 12 made of special material is arranged between the foreign object bin 7 and the contact seat 11 to prevent friction between the foreign object bin 7 and the contact seat 11.

[0036] like Figures 2 to 4 As shown, the contact 10 at one end of the three-phase conductor 8 is inserted into the contact seat 11 in the pot-type insulator assembly 6 and embedded therewith, the contact seat 11 at the other end of the three-phase conductor 8 is plug-in connected to the contact 10 of the foreign body bin 7, the contact seat 11 of the foreign body bin 7 is plug-in connected to the contact 10 of the bellows compensator 2, and the contact seat 11 at one end of the three-phase conductor 8 located in the straight-cylinder housing 1 is plug-in connected to the contact seat 11 of the bellows compensator 2. After the three-phase conductor 8 is crimped with the fixed three-support assembly 4 or the sliding three-support assembly 5, the three-phase conductor 8 is placed in the right-angle housing 3, and the contact 10 of the three-phase conductor 8 One end is inserted into the contact seat 11 on the pot-type insulator assembly 6, and the other end is connected to the contact 10 in the foreign object bin 7. The bottom of the contact seat 11 is designed with a space with a depth of 50 mm to ensure that the conductor can be stretched under thermal expansion and contraction and leave sufficient space. A sliding three-support assembly 5 is arranged inside the straight cylindrical shell 1. The sliding three-support assembly 5 is fixedly connected to the straight cylindrical shell 1. The three-phase conductor 8 passes through the sliding three-support assembly 5 and is slidably connected to it. The sliding three-support assembly 5 has the same structure as the fixed three-support assembly 4. The three-phase conductor 8 passes through the sliding three-support assembly 5 through the wire hole and is slidably connected to it.

[0037] like Figure 4As shown, a pot-type insulator assembly 6 is provided at one end of the right-angle shell 3 away from the bellows compensator 2, and the pot-type insulator assembly 6 is bolted to the right-angle shell 3. If the bellows compensators 2 are provided at both ends of the right-angle shell 3, the pot-type insulator assembly 6 is provided between the right-angle shell 3 and the bellows compensator 2 and is bolted to both of them respectively. The pot-type insulator assembly 6 is connected to the right-angle shell 3 or the bellows compensator 2 through a flange surface. A particle catcher 41 is provided inside the pot-type insulator assembly 6, and the particle catcher 41 is fixedly connected to the pot-type insulator assembly 6. The particle catcher 41 is tightly attached to the inner wall of the pot-type insulator assembly 6. Metal particles near the pot-type insulator assembly 6 are captured by the particle catcher 41 under the action of the electric field and fall into the particle trap, thereby avoiding the drift of metal particles in the air chamber and preventing the influence on the insulation performance of the insulating part surface. In addition, the particle catcher 41 structure occupies a small shell space, which can well ensure the insulation distance between the particle catcher 41 and the conductor.

[0038] The working principle provided by the utility model is that the utility model is connected to the main circuit, wherein the straight-cylinder housing 1 is connected to the main circuit, the straight-cylinder housing 1 is connected to the right-angle housing 3 through the bellows compensator 2, the three-phase conductor 8 is installed in the right-angle housing 3, the contact 10 at one end of the three-phase conductor 8 is inserted into the contact seat 11 in the basin-type insulator assembly 6 and is embeddedly connected thereto, the contact seat 11 at the other end of the three-phase conductor 8 is plug-in connected to the contact 10 of the foreign body bin 7, and the contact seat 11 of the foreign body bin 7 is plug-in connected to the contact 10 of the bellows compensator 2 Connection, the contact seat 11 at one end of the three-phase conductor 8 located in the straight cylindrical housing 1 is plug-in connected with the contact seat 11 of the bellows compensator 2. After the three-phase conductor 8 is crimped with the fixed three-support assembly 4 or the sliding three-support assembly 5, the three-phase conductor 8 is placed in the right-angle housing 3, and one end of the contact 10 of the three-phase conductor 8 is inserted into the contact seat 11 on the pot-type insulator assembly 6, and the other end is connected to the contact 10 in the foreign object bin 7. The pot-type insulator assembly 6 is connected to the straight cylindrical housing 1 and is connected to the other end of the main circuit to communicate with the main circuit.

[0039] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A three-phase GIL right-angle unit, characterized in that: It includes a straight shell, a sliding three-support assembly, a fixed three-support assembly and a right-angle shell. The two ends of the right-angle housing are respectively provided with straight-cylinder housings, and the straight-cylinder housings are bolted to the right-angle housing; A bellows compensator is provided at at least one end of the right-angle housing, the bellows compensator is located between the right-angle housing and the straight-cylinder housing, and the bellows compensator is bolted to the right-angle housing and the straight-cylinder housing respectively; Three fixed support assemblies are respectively arranged near both ends of the right-angle shell, and the three fixed support assemblies are fixedly connected to the right-angle shell; Three groups of three-phase conductors distributed at right angles are distributed inside the right-angle housing, and the three-phase conductors respectively pass through two groups of fixed three-support components and are fixedly connected thereto; A sliding three-support assembly is arranged inside the straight-cylinder shell, the sliding three-support assembly is in sliding connection with the straight-cylinder shell, and the three-phase conductor passes through the sliding three-support assembly and is in sliding connection with the straight-cylinder shell.

2. The three-phase GIL right-angle unit according to claim 1 is characterized in that: A pot-type insulator assembly is arranged at one end of the right-angle shell away from the bellows compensator, and the pot-type insulator assembly is bolted to the right-angle shell. If bellows compensators are arranged at both ends of the right-angle shell, the pot-type insulator assembly is arranged between the right-angle shell and the bellows compensator and is bolted to both of them respectively.

3. The three-phase GIL right-angle unit according to claim 2 is characterized in that: A particle catcher is arranged inside the pot-type insulator assembly. The particle catcher is fixedly connected to the pot-type insulator assembly and is closely attached to the inner wall of the pot-type insulator assembly.

4. The three-phase GIL right-angle unit according to claim 1, characterized in that: A foreign object bin is provided at the connection between the contact and the contact seat of the fixed three-support component, a contact is embedded in one end of the foreign object bin, the contact is fixedly connected to the foreign object bin, the other end of the foreign object bin is fixedly connected to the contact seat, and a wear-resistant wire ring is fixedly connected to the inner wall of the foreign object bin away from the contact end.

5. The three-phase GIL right-angle unit according to claim 1, characterized in that: The two ends of the three-phase conductor are respectively fixedly connected with contacts and contact seats, and the corresponding positions inside the bellows compensator and the pot-type insulator assembly are respectively fixedly connected with contacts and contact seats, and the contacts are adapted to the contact seats.

6. The three-phase GIL right-angle unit according to claim 1, characterized in that: The contact at one end of the three-phase conductor is inserted into the contact seat in the pot-type insulator assembly and embedded with it, the contact seat at the other end of the three-phase conductor is plug-in connected to the contact of the foreign object bin, the contact seat of the foreign object bin is plug-in connected to the contact of the bellows compensator, and the contact seat at one end of the three-phase conductor located in the straight cylindrical shell is plug-in connected to the contact seat of the bellows compensator.

7. The three-phase GIL right-angle unit according to claim 1, characterized in that: The fixed three-support assembly includes a particle catcher, which is a straight-cylindrical structure. A plurality of through holes are evenly arranged on the surface of the particle catcher. Three support frames are arranged inside the particle catcher, and the three support frames are fixedly connected to the particle catcher.

8. The three-phase GIL right-angle unit according to claim 7, characterized in that: Three groups of wire holes are opened on the surface of the three support frames, and multiple groups of thread grooves are arranged on the side surfaces of the three support frames. The particle catcher is connected to the thread groove by passing a fixing bolt through the through hole.

9. The three-phase GIL right-angle unit according to claim 1, characterized in that: The three-phase conductor passes through the three supporting frames through the wire holes and is fixedly connected thereto.

10. The three-phase common box GIL right angle unit according to claim 1, characterized in that: The sliding three-support assembly has the same structure as the fixed three-support assembly, and the three-phase conductor passes through the sliding three-support assembly through the wire hole and is slidably connected thereto.

Images