Compensation connecting device for isolated-phase bus shell

Abstract

The utility model relates to a compensation connecting device for an isolated-phase bus shell, belongs to the technical field of power equipment, and provides a novel compensation connecting device aiming at the problems of heavy weight, inconvenience in installation and maintenance, easiness in aging and the like existing in the conventional aluminum corrugated pipe and rubber corrugated pipe connecting device. Deflection or displacement of the connecting device caused by vibration of the bus shell is effectively prevented. The device is simple in structure and convenient to install and maintain, improves the safety and reliability of power equipment, is suitable for shell connection of various isolated-phase bus systems, and has remarkable technical progress and wide application prospects; the device is made of light and high-strength materials, so that the overall weight is reduced, and installation and maintenance are facilitated; meanwhile, the device also has excellent anti-aging performance and can stably work for a long time; in practical application, the device is successfully applied to a plurality of electric power projects, and high evaluation of users is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of bus connection in power equipment, and particularly relates to a compensation connection device for a separated-phase enclosed bus housing. Background Art

[0002] In the power system, the separated-phase enclosed bus is a key component for power transmission. Its stability and reliability are crucial for the safe operation of the entire system. To cope with the telescopic deformation of the bus caused by factors such as temperature changes and mechanical vibrations during operation, the compensation connection device has become an essential part. Currently, there are various design schemes for the separated-phase enclosed bus compensation connection device on the market, but each has certain limitations.

[0003] Firstly, in traditional designs, the separated-phase enclosed bus compensation connection device often adopts a bellows structure, including a bellows body and a flange assembly. The bellows body is usually composed of two semi-circular parts, which are assembled and locked onto the enclosed bus housing through bolts and the flange assembly. This design achieves the telescopic compensation function of the bus to a certain extent, but its structure is complex, and the installation and maintenance processes are cumbersome. Especially in the application of large-diameter bellows, the overall weight is large, which not only increases the installation difficulty but also limits the convenience of maintenance. In addition, although the selection of bellows materials (such as pure aluminum 1060) has the advantages of high plasticity, corrosion resistance, good electrical conductivity, and thermal conductivity, its strength is low, and the cutting performance is not good, making the precision control in the processing and installation process a challenge.

[0004] On the other hand, the rubber bellows, as another common material for the compensation connection device, is made of chlorosulfonated polyethylene rubber and has excellent properties such as resistance to ultraviolet rays, ozone, and atmospheric aging. However, the rubber bellows also exposes many problems in practical applications. For example, rubber products are prone to aging and deformation, and their performance deteriorates after long-term use, affecting the compensation effect. At the same time, the connection method between the rubber bellows and the enclosed bus housing (such as the steel belt tightening device) has a risk of steel belt detachment, increasing the instability of the system. In addition, rubber itself contains sulfur, and the release of sulfur during use is likely to chemically react with the silver in the silver-plated parts of the enclosed bus, forming silver sulfide, resulting in the blackening or detachment of the silver-plated layer, which in turn has an adverse impact on the electrical conductivity and safe operation of the bus.

[0005] In summary, although the off-phase enclosed busbar compensation connection device in the prior art meets the requirements of busbar expansion compensation to a certain extent, there are still many deficiencies in terms of material selection, structural design, installation convenience, maintenance safety, and long-term operation stability. Therefore, it is necessary to improve and innovate the existing compensation connection device to overcome the above technical defects and improve the overall performance and reliability of the off-phase enclosed busbar. The present invention is proposed based on this background, aiming to achieve a more efficient, stable, and convenient busbar compensation connection function through a new design scheme. Summary of the Invention

[0006] The technical problem to be solved by the present utility model is to provide an off-phase enclosed busbar housing compensation connection device to solve the problems that the busbar connection device in the prior art causes busbar deformation due to large vibration during the operation of the enclosed busbar, and the bellows and flange assembly connected thereto deflect or shift.

[0007] To solve the above technical problem, the technical solution adopted by the present utility model is: an off-phase enclosed busbar housing compensation connection device, which includes a bellows body. Flange assemblies are installed at both ends of the bellows body. The bellows body and the flange assemblies at both ends are connected and fastened together in the length direction by long screws and nuts. The other end of the flange assembly is connected to the busbar housing. The busbar housing is sleeved inside the flange assembly, and a movable clamp is clamped on its outer ring. A sealing plate is pasted between the movable clamp and the flange assembly and is connected and fixed by a number of anti-twist rods. A sealing plate is also arranged in the circumferential gap between the flange assembly and the busbar housing.

[0008] In a preferred solution, the bellows body is composed of two semi-circular components, which are combined with each other and connected and fixed into a whole by fasteners to meet the needs of busbar housing compensation.

[0009] In a preferred solution, at the joint of the two semi-circular surfaces of the bellows body, a first connecting plate is arranged on one side. A connecting seat is fixedly installed across the first connecting plate, and the first connecting plate and the connecting seat are connected and fixed together by bolts. A hinge mechanism is arranged on the other side to connect and fix the two semi-circular surfaces of the bellows body together.

[0010] In a preferred solution, the flange assembly includes an intermediate cylinder and flanges at both ends, and is also divided into two semi-circular components, which are assembled and locked in the enclosed busbar housing by bolts, match with the bellows body and are buckled and connected to form a stable connection structure.

[0011] In a preferred solution, retaining rings are arranged at both ends of the bellows body, and bosses are arranged at the mating ends of the flange assembly and the bellows body. The retaining rings on the bellows body are buckled and connected with the bosses on the bellows body together.

[0012] In a preferred embodiment, on the two semi-circular flanges of the flange assembly near the bellows body end, a second connecting plate is provided, and a connecting seat is fixedly mounted across the second connecting plate. The second connecting plate and the connecting seat are fixedly connected together by bolts.

[0013] In a preferred embodiment, a connecting hole is further provided at the top of the connecting seat. A long screw is inserted into the connecting hole to fixedly connect the flange assembly and the bellows body together, and double nuts are used at both ends of the long screw for fastening and loosening prevention.

[0014] In a preferred embodiment, a number of holes are provided on the flanges at both ends of the flange assembly, and a corresponding number of holes are also provided on the movable clamp. Threads are provided at both ends of the anti-twist rod, and it is inserted into the holes of the flanges at both ends of the flange assembly and the movable clamp to screw them together.

[0015] In a preferred embodiment, the bellows body, the flange assembly, and the sealing plate are subjected to anti-corrosion treatment. The gaps between the flange assembly, the busbar housing, and the sealing plate are filled with a sealing filler, and this filler is based on a two-component polyether / isocyanate resin material.

[0016] In a preferred embodiment, the long screw, bolts, and nuts are all made of anti-magnetic stainless steel.

[0017] In a preferred embodiment, an insulating material layer with high temperature resistance and corrosion resistance is further coated on the outside of the bellows body; the surface of the flange assembly is also subjected to wear-resistant treatment.

[0018] In a preferred embodiment, the transmission member adopts a lead screw structure, and a lead screw nut matching with it is provided on the mounting rod.

[0019] A phase-separated enclosed busbar housing compensation connection device provided by the present utility model has the following beneficial effects:

[0020] 1. The present utility model solves the problems in the prior art that during the operation of the enclosed busbar, the busbar is deformed due to large vibrations, and the bellows and flange assembly connected thereto are deflected or displaced.

[0021] 2. The improvement of the present utility model not only reduces safety hazards such as filler leakage, but also extends the service life of the connection device and reduces the maintenance cost.

[0022] 3. The design of the present utility model also incorporates a modular concept, which is convenient for installation and maintenance. At the same time, its compact structure design reduces space occupation, improves the overall layout efficiency of the power system, and provides a more reliable and economical solution for the construction of modern power facilities.

[0023] 4. Through the optimized design of the connection part, the present utility model improves the strength and durability of the overall structure, ensures the continuity and safety of power transmission, further meets the operation requirements under complex working conditions, and provides a more reliable solution for the power industry;

[0024] 5. Through the design of the anti-torsion bar and the movable clamp, the present utility model effectively solves the problems of easy loosening and easy twisting of traditional connectors; the anti-torsion bar is made of high-strength materials, enhancing the overall anti-torsion performance; the movable clamp realizes fast and stable locking and release through precise mechanical structure design, improving the stability and use efficiency of the equipment;

[0025] 6. The structure design of the present utility model is reasonable, easy to install, and has high practicality and popularization value;

[0026] 7. The present utility model significantly improves the stability of the enclosed busbar housing connection device, effectively preventing the deflection or displacement of the bellows and flange components caused by busbar vibration;

[0027] 8. While ensuring the stable operation of the system, the present utility model also takes into account the environmental protection concept of energy conservation and emission reduction. By reducing the maintenance frequency and energy consumption, it contributes to the sustainable development of the power industry and is expected to be widely applied in more power projects in the future;

[0028] 9. The beneficial effects of the present invention have been fully demonstrated through detailed experimental verification and actual use. Its stability and reliability have reached the leading level in the industry, providing a strong guarantee for the safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0030] Figure 1 is the schematic diagram of the overall structure of the present utility model;

[0031] Figure 2 is the axonometric schematic diagram of the overall structure of the present utility model;

[0032] Figure 3 is the sectional view of the overall structure of the present utility model;

[0033] In the figure: bellows body 1, busbar housing 2, flange assembly 3, sealing plate 4, long screw 5, first connecting plate 6, connecting seat 7, hinge mechanism 8, second connecting plate 9, anti-torsion bar 10, movable clamp 11. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following further describes the technical solutions in the present utility model in conjunction with the drawings and embodiments:

[0035] Embodiment 1

[0036] As shown Figures 1 to 3 in the figure, a compensation connection device for a separated-phase enclosed busbar housing includes a corrugated pipe body 1. Flange assemblies 3 are installed at both ends of the corrugated pipe body 1. The corrugated pipe body 1 and the flange assemblies 3 at both ends are connected and fastened together in the length direction by long screws 5 and nuts. The other end of the flange assembly 3 is connected to the busbar housing 2. The busbar housing 2 is sleeved inside the flange assembly 3, and a movable clamp 11 is clamped on its outer ring. A sealing plate 4 is pasted between the movable clamp 11 and the flange assembly 3, and several anti-twist bars 10 are used to connect and fix them. A sealing plate 4 is also arranged in the circumferential gap between the flange assembly 3 and the busbar housing 2.

[0037] In this embodiment, the corrugated pipe body 1 is composed of two semi-circular parts, which are combined with each other and connected and fixed into a whole by fasteners to meet the need for compensation of the busbar housing 2.

[0038] Furthermore, at the joint of the two semi-circular surfaces of the corrugated pipe body 1, a first connecting plate 6 is arranged on one side. A connecting seat 7 is fixedly installed across the first connecting plate 6. The first connecting plate 6 and the connecting seat 7 are connected and fixed together by bolts. A hinge mechanism 8 is arranged on the other side to connect and fix the two semi-circular surfaces of the corrugated pipe body 1.

[0039] Furthermore, the flange assembly 3 includes an intermediate cylinder and flanges at both ends, and is also divided into two semi-circular parts, which are assembled and locked inside the enclosed busbar housing 2 by bolts, and are matched and buckled with the corrugated pipe body 1 to form a stable connection structure.

[0040] Furthermore, retaining rings are arranged at both ends of the corrugated pipe body 1, and bosses are arranged at the mating ends of the flange assembly 3 and the corrugated pipe body 1. The retaining rings on the corrugated pipe body 1 and the bosses on the corrugated pipe body 1 are buckled and connected with each other.

[0041] Furthermore, on the two semi-circular flanges of the flange assembly 3 close to the corrugated pipe body 1, a second connecting plate 9 is arranged. A connecting seat 7 is fixedly installed across the second connecting plate 9. The second connecting plate 9 and the connecting seat 7 are connected and fixed together by bolts.

[0042] Furthermore, a connecting hole is also arranged at the top of the connecting seat 7. The long screw 5 is inserted into the connecting hole to connect and fix the flange assembly 3 and the corrugated pipe body 1. Double nuts are used at both ends of the long screw 5 for fastening and anti-loosening.

[0043] Furthermore, several holes are arranged on the flanges at both ends of the flange assembly 3, and corresponding holes are also arranged on the movable clamp 11. Threads are arranged at both ends of the anti-twist bar 10, and it is inserted into the holes of the flanges at both ends of the flange assembly 3 and the movable clamp 11 and screwed together.

[0044] Furthermore, the corrugated pipe body 1, flange assembly 3, and sealing plate 4 are designed with anti-corrosion treatment. For the gaps between the flange assembly 3, busbar housing 2, and sealing plate 4, a sealing filler is filled. This filler is based on a two-component polyether / isocyanate resin material, combined with a functional filler and functional additives.

[0045] Furthermore, the long screw 5, bolts, and nuts are all made of non-magnetic stainless steel.

[0046] Furthermore, an insulating material layer with high temperature resistance and corrosion resistance is also coated on the outside of the corrugated pipe body 1; the surface of the flange assembly 3 has also been treated for wear resistance.

[0047] During specific use, during the operation of the busbar, due to factors such as temperature changes and mechanical vibrations, the telescopic deformation caused will be absorbed by the elastic filler inside the corrugated pipe assembly; at the same time, the combination of the long screw 5 and the sealing plate 4 ensures the stability of the flange assembly 3, and the connecting device can remain stable even in a strong vibration environment.

[0048] Embodiment 2

[0049] In another preferred embodiment, in order to further improve the applicability and reliability of the compensation connecting device, based on the above Embodiment 1, this embodiment is improved, and the main improvement points lie in the material and structure of the corrugated pipe body.

[0050] In this embodiment, the corrugated pipe body 1 is made of stainless steel (such as 304 stainless steel) to improve its high temperature resistance and corrosion resistance; at the same time, the structure of the corrugated pipe is optimized and designed with a multi-layer composite structure. The inner layer is an elastic metal layer for absorbing vibration energy; the middle layer is a heat insulation layer to prevent the influence of heat transfer on the performance of the busbar; the outer layer is a protective layer to enhance the wear resistance and impact resistance of the corrugated pipe; in addition, the shape of the corrugated pipe is also slightly adjusted to better adapt to the telescopic deformation of the busbar under different working conditions.

[0051] In other parts, the flange assembly 3, sealing plate 4, etc. and the working process in this embodiment are the same as those in Embodiment 1, and will not be elaborated here.

[0052] Through the description of the above two embodiments, it can be seen that the off-phase enclosed busbar housing compensation connecting device provided by the present utility model has made innovative improvements in terms of structural design, material selection, and working process, etc.; these improvements not only improve the stability and reliability of the compensation connecting device, but also enhance its applicability and durability, providing a strong guarantee for the safe and stable operation of the power system.

[0053] In a preferred embodiment, the corrugated pipe body 1 is composed of two semi-circular components, which are combined with each other and fixed into a whole by fasteners to meet the compensation requirements of the busbar housing 2; the above arrangement enables the corrugated pipe body 1 to flexibly follow the thermal expansion and contraction changes of the busbar housing 2, effectively avoiding stress concentration and damage. At the same time, the design of the fasteners ensures the firmness and tightness of the connection, improving the reliability and safety of the overall system.

[0054] In a preferred embodiment, at the joint of the two semi-circular surfaces of the corrugated pipe body 1, a first connecting plate 6 is provided on one side. A connecting seat 7 is fixedly installed across the first connecting plate 6, and the first connecting plate 6 and the connecting seat 7 are fixedly connected together by bolts. On the other side, a hinge mechanism 8 is provided to connect and fix the two semi-circular surfaces of the corrugated pipe body 1 together; the above arrangement not only ensures the tightness of the corrugated pipe body 1 but also facilitates subsequent disassembly and maintenance; the design of the connecting seat 7 further enhances the strength of the overall structure and the integrity of the connection, facilitating the installation and operation of other components in the future; the design of the hinge mechanism 8 enables the corrugated pipe to be flexibly unfolded or contracted when needed, enhancing its adaptability and service life.

[0055] In a preferred embodiment, the flange assembly 3 includes an intermediate cylinder and flanges at both ends, and is also divided into two semi-circular components, which are assembled and locked in the enclosed busbar housing 2 by bolts, matching and buckling with the corrugated pipe body 1 to form a stable connection structure; the above arrangement effectively connects and fixes the busbar housing 2, the flange assembly 3 and the corrugated pipe body 1 together, while ensuring the tightness of the busbar housing 2, facilitating maintenance and replacement; at the same time, the material of the flange assembly 3 is selected as a high-strength corrosion-resistant alloy, enhancing the durability and safety of the overall structure.

[0056] In a preferred embodiment, retaining rings are provided at both ends of the corrugated pipe body 1, and bosses are provided at the mating ends of the flange assembly 3 and the corrugated pipe body 1. The retaining rings on the corrugated pipe body 1 and the bosses on the corrugated pipe body 1 are buckled and connected together; the above arrangement effectively prevents the corrugated pipe from loosening under high pressure or vibration conditions, enhancing the firmness and tightness of the connection; at the same time, this structural design facilitates installation and disassembly, improving the maintenance efficiency and reducing the use cost.

[0057] In a preferred embodiment, on the two semi-circular flanges of the flange assembly 3 close to the corrugated pipe body 1, a second connecting plate 9 is provided. A connecting seat 7 is fixedly installed across the second connecting plate 9, and the second connecting plate 9 and the connecting seat 7 are fixedly connected together by bolts; the above arrangement ensures the firmness of the flange assembly 3 during connection, effectively preventing loosening or separation caused by vibration or external forces; at the same time, the design of the connecting seat 7 facilitates further connection with other components, enhancing the flexibility and expandability of the overall structure.

[0058] In a preferred embodiment, a connection hole is further provided at the top of the connection base 7. The long screw 5 is inserted into the connection hole to connect and fix the flange assembly 3 and the corrugated pipe body 1 together. Double nuts are used at both ends of the long screw 5 for fastening and loosening prevention. The above settings ensure the stability and sealing performance of the connection structure, effectively resist the vibration and impact that may occur during operation. At the same time, the design of double nuts enhances the reliability of the connection and prevents leakage problems caused by loosening.

[0059] In a preferred embodiment, the corrugated pipe body 1, the flange assembly 3, and the sealing plate 4 are subjected to anti-corrosion treatment. The above settings ensure that the busbar connector can still maintain excellent sealing performance and corrosion resistance in harsh environments, effectively extend the service life of the equipment, reduce the maintenance cost, and improve the stability and safety of power transmission at the same time.

[0060] In a preferred embodiment, the gaps between the flange assembly 3, the busbar housing 2, and the sealing plate 4 are filled with a sealing filler. This filler is based on a two-component polyether / isocyanate resin material, combined with functional fillers and functional additives. The main function of the above settings is to block the gaps formed between the composite expansion joint and the metal pipeline after installation, preventing water, oil, and dust from entering along the gaps and affecting the normal operation of the power supply line. The material has a simple application process, has a certain degree of volume expansion during curing, the cured product has good elasticity and appropriate adhesive strength, has excellent filling and sealing properties for gaps, has higher curing strength compared with general foaming filling materials, significantly enhanced resistance to various aging media erosion, stable physical and chemical properties after long-term use, and has good flame retardant properties at the same time. In addition, this sealing filler also has excellent weather resistance and temperature resistance, can maintain stable performance within a wide temperature range, ensure effective protection of the power supply line in extreme environments, and improve the safety and reliability of the overall equipment.

[0061] In a preferred embodiment, a number of holes are provided on the flanges at both ends of the flange assembly 3, and a corresponding number of holes are also provided on the movable clamp 11. Threads are provided at both ends of the anti-twist rod 10, and it is inserted into the holes of the flanges at both ends of the flange assembly 3 and the movable clamp 11 to screw them together. The above settings ensure the stable connection between the flange assembly 3 and the movable clamp 11. The threaded design of the anti-twist rod 10 provides a reliable locking force, effectively preventing loosening caused by vibration or external force, and ensuring the stability and safety of the overall structure.

[0062] In a preferred embodiment, the long screw 5, bolts, and nuts are all made of anti-magnetic stainless steel. The above settings ensure the stable operation of the equipment in a strong magnetic field environment, effectively resist the interference and corrosion of the magnetic field, extend the service life of the overall structure, and improve the reliability and safety of the equipment.

[0063] In a preferred embodiment, the outer surface of the corrugated pipe body 1 is further coated with a layer of high-temperature and corrosion-resistant insulating material; the surface of the flange assembly 3 is also subjected to wear-resistant treatment; with the above settings, the overall durability and safety of the corrugated pipe are effectively improved. In a high-temperature and corrosive environment, the insulating material layer can protect the corrugated pipe from damage, while the wear-resistant treated flange assembly extends the service life of the equipment and reduces the maintenance cost.

[0064] In summary, the present utility model provides a compensating connection device for a separated-phase enclosed busbar housing, which solves the problems in the prior art that during the operation of the enclosed busbar, the busbar is deformed due to large vibrations, and the corrugated pipe and the flange assembly of the connection deflect or shift; and the problems of large weight, inconvenient installation and maintenance, and easy aging existing in the existing aluminum corrugated pipe and rubber corrugated pipe connection devices; through optimizing the structural design, better connection stability is achieved, effectively preventing the deflection or shift of the connection device caused by the vibration of the busbar housing; the present utility model effectively absorbs the vibration energy of the busbar through a special compensating connection structure, maintains the stability of the busbar system, and at the same time ensures the accurate positioning of the corrugated pipe and the flange assembly, extends the service life of the equipment, and improves the operation safety and reliability of the power system; the device has a simple structure, convenient installation and maintenance, improves the safety and reliability of power equipment, is applicable to the housing connection of various separated-phase enclosed busbar systems, has significant technological progress and broad application prospects; the device further reduces the overall weight and cost of the device through lightweight design and optimized material selection, is convenient for installation and maintenance, and its modular design enhances the flexibility and scalability of the system, providing convenient conditions for the upgrading and transformation of future power facilities; at the same time, the device also has excellent anti-aging performance and can work stably for a long time; in practical applications, the device has been successfully applied to multiple power projects and has received high praise from users, verifying its excellent performance and reliability; in addition, during the research and development process of the device, environmental protection requirements are fully considered, and the selected materials all meet the green standards, realizing the efficient utilization and recycling of resources and contributing to the sustainable development of the power industry.

Claims

1. A phase-isolated enclosed busbar housing compensating connection device, characterized in that: The invention comprises a bellows body (1), flange assemblies (3) are installed at both ends of the bellows body (1), the bellows body (1) and the flange assemblies (3) at both ends are connected and fastened together in the length direction by long screws (5) and nuts, the other end of the flange assembly (3) is connected to a busbar housing (2), the busbar housing (2) is sleeved in the flange assembly (3), the outer ring of which is clamped with a movable clamp (11), a sealing plate (4) is clamped between the movable clamp (11) and the flange assembly (3), and a plurality of anti-twist rods (10) are used to connect and fix them, and a sealing plate (4) is also arranged in the circumferential gap between the flange assembly (3) and the busbar housing (2).

2. A phase-isolated enclosed busbar housing compensating connection device according to claim 1, characterized in that: The bellows body (1) is composed of two semicircular parts, which are combined with each other and fixed into a whole by fasteners to meet the compensation requirements of the busbar housing (2).

3. A phase-isolated enclosed busbar housing compensating connection device according to claim 2, characterized in that: A first connecting plate (6) is provided on one side of the part where the two semicircular surfaces of the bellows body (1) meet, a connecting seat (7) is fixedly mounted on the first connecting plate (6), the first connecting plate (6) and the connecting seat (7) are fixed together by bolts, and a hinge mechanism (8) is provided on the other side to connect and fix the two semicircular surfaces of the bellows body (1) together.

4. A phase-isolated enclosed busbar housing compensating connection device according to claim 3, characterized in that: The flange assembly (3) comprises a middle cylinder and flanges at both ends, and is also divided into two semicircular parts, which are assembled and locked in the closed busbar housing (2) by bolts, matched with the bellows body (1) and snap-connected to form a stable connection structure.

5. The phase-isolated enclosed busbar housing compensating connection device according to claim 4, characterized in that: Retaining rings are provided at both ends of the bellows body (1), bosses are provided at the matching ends of the flange assembly (3) and the bellows body (1), and the retaining rings on the bellows body (1) and the bosses on the bellows body (1) are mutually buckled and connected together.

6. A phase-isolated enclosed busbar housing compensating connection device according to claim 5, characterized in that: A second connecting plate (9) is provided on two semicircular flanges of the flange assembly (3) close to the end of the bellows body (1), a connecting seat (7) is straddled and fixed on the second connecting plate (9), and the second connecting plate (9) and the connecting seat (7) are fixed together by bolt connection.

7. A phase-isolated enclosed busbar housing compensating connection device according to claim 6, characterized in that: The top of the connection seat (7) is also provided with a connection hole, and the long screw rod (5) is inserted into the connection hole to connect and fix the flange assembly (3) and the bellows body (1) together, and double nuts are used at both ends of the long screw rod (5) to tighten and prevent loosening.

8. The phase-isolated enclosed busbar housing compensating connection device according to claim 7, characterized in that: The flanges at both ends of the flange assembly (3) are provided with a plurality of holes, and the movable clamp (11) is also provided with a plurality of corresponding holes. The anti-twist rod (10) is provided with threads at both ends, and is inserted into the holes of the flanges at both ends of the flange assembly (3) and the movable clamp (11), thereby screwing them together.

9. A phase-isolated enclosed busbar housing compensating connection device according to claim 8, characterized in that: The bellows body (1), flange assembly (3) and sealing plate (4) are subjected to anti-corrosion treatment, and the gaps between the flange assembly (3), busbar housing (2) and sealing plate (4) are then filled with a sealing filler, the filler being based on a two-component polyether / isocyanate resin material.

10. A phase-isolated enclosed busbar housing compensating connection device according to claim 9, characterized in that: The long screw (5), bolts and nuts are all made of anti-magnetic stainless steel; the outside of the bellows body (1) is also coated with a layer of high temperature resistant and corrosion resistant insulating material; and the surface of the flange assembly (3) is also subjected to wear resistance treatment.

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