Bus duct connecting pipe assembly with sealing structure

Abstract

The bus duct connecting pipe assembly with the sealing structure comprises a first connecting pipe and a second connecting pipe, and is characterized in that a first flange is arranged at a first free end, the bus duct connecting pipe assembly further comprises an adhesive tape pressing plate, and the adhesive tape pressing plate is detachably connected to the first flange; a sealing rubber strip is arranged at the outer side opening part or the interior of the wire slot gap, and when the rubber strip pressing plate is connected to the first flange and tightened, the rubber strip pressing plate extrudes the sealing rubber strip to enable the sealing rubber strip to seal the outer side opening part or the interior of the wire slot gap; the sealing structure further comprises a frame-shaped supporting frame, the supporting frame is arranged on the inner side of the second free end and supports the inner side wall of the second free end, and the area, bearing extrusion force of the sealing rubber strip, of the outer side wall of the second free end corresponds to the supporting area, supporting the inner side wall of the second free end, of the supporting frame inside and outside. During actual installation, the installation length of the connecting pipes is adjusted in real time through movable stretching and retracting of the two connecting pipes, the problem that size errors are generated in the installation process of the bus connecting pipes is well solved, and engineering waste is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field related to bus duct connection and installation, and in particular to a bus duct connecting pipe assembly with a sealing structure for protecting the connection portion of the bus duct in equipment such as transformers and distribution cabinets. Background Art

[0002] Prefabricated substations are equipped with high-voltage cabinets, low-voltage cabinets, transformers, and other equipment. The low-voltage cabinets and transformers are connected to the busbars using flexible copper busbars. In typical applications, this connection, located between the low-voltage cabinets and the transformer, is typically unprotected. This exposes the connection to the elements for extended periods, exposing it to weather and erosion, which can shorten the lifespan of the connectors. It can also cause short circuits due to falling or entangled foreign objects, compromising the overall safety of the substation. Therefore, a protective cover is required at the busbar connection to protect the busbar and connectors. The cover is insulated from the busbar to ensure safe operation of the equipment. However, these covers are typically non-standard components. Each prefabricated substation design requires a unique design and manufacturing process tailored to the site's space requirements, significantly increasing the design workload and manufacturing costs. Furthermore, during installation, manufacturing errors in the cover, hole placement, and other components often make installation difficult or even impossible, significantly impacting the delivery efficiency of prefabricated substations.

[0003] To this end, improvements have been made to the structure of the protective cover. For example, Chinese Utility Model Patent No. CN217406124U discloses a fire-resistant busbar duct expansion unit, which includes a first connecting tube shell and a second connecting tube shell. The top and bottom ends of the first and second connecting tube shells are fixedly connected to cover plates by bolts. A expansion assembly is fixedly connected between the opposite ends of the first and second connecting tube shells. The expansion assembly includes a first expansion shell and a second expansion shell. With the cooperation of the first and second expansion shells, the second expansion shell can be adjusted to slide inside the second expansion shell, thereby realizing the expansion and contraction function. The expansion assembly can effectively solve the problem of dimensional error of the protective cover during installation, reducing engineering waste.

[0004] Chinese Utility Model Patent Publication No. CN217406124U discloses a solution for improving the sealing effect of the telescopic assembly connection. The first limiting baffle has a limiting groove on its inner periphery, and a sealing strip is fixedly connected to the groove. However, the patent does not describe the specific sealing connection structure. Because transformer substations are generally installed and used outdoors, the operating conditions are not only complex but also very harsh. Common application environments may include high temperatures, freezing temperatures, wind, rain, hail, sandstorms, etc. Therefore, the simple sealing strips used in the existing technology may not be able to withstand harsh operating environments. Therefore, further improvements to the connecting pipe structure are necessary. Summary of the Invention

[0005] In order to overcome the problems existing in the prior art, the present invention proposes a busbar duct connecting pipe assembly with a sealing structure, comprising a first connecting pipe and a second connecting pipe, the first connecting pipe comprising a first free end, the second connecting pipe comprising a second free end, the inner circumference size of the first free end being larger than the outer circumference size of the second free end, a portion of the second free end being inserted into the first free end and a wire duct gap being formed in the socket area; it is characterized in that a first flange is provided on the first free end, and further comprising a strip pressure plate, the strip pressure plate being detachably connected to the first flange; a sealing strip is arranged at the outer opening or inside of the wire duct gap, and when the strip pressure plate is connected to the first flange and tightened, the strip pressure plate squeezes the sealing strip so that the sealing strip seals the outer opening or inside of the wire duct gap; it also comprises a frame-shaped support frame, the support frame is arranged on the inner side of the second free end and supports the inner side wall of the second free end, the area of ​​the outer side wall of the second free end subjected to the extrusion force of the sealing strip corresponds to the inside and outside of the support area where the support frame supports the inner side wall of the second free end.

[0006] The first and second connecting tubes are two independently manufactured tubular components. The first connecting tube includes a first fixed end and a first free end, while the second connecting tube includes a second fixed end and a second free end. Typically, two connected busbar sections include not only the exposed busbar joints but also the busbar body protected by the busbar duct. The first and second fixed ends are fixedly connected to the two busbar ducts, respectively. By connecting the first free end of the first connecting tube to the second free end of the second connecting tube, the connected busbar joints are protected.

[0007] The sleeve area refers to the area where the two sections of the tube overlap when the second free end is inserted into the first free end.

[0008] The wire trough gap is formed because the inner circumference of the first free end is larger than the outer circumference of the second free end. When the second free end is inserted into the first free end, an annular gap is formed between the outer wall of the second free end and the inner wall of the first free end. To facilitate installation, the thickness of the wire trough gap is generally 3-10 mm per side. However, while this thickness facilitates installation, moisture and impurities can easily enter the first and second connecting tubes.

[0009] The first flange is an outwardly protruding annular disc-shaped structure provided on the first free end. Specifically, the first flange can be a machined, outwardly turned vertical edge on the end wall of the first free end, or a separately machined annular component secured to the first free end by welding or adhesive. Therefore, the first flange can be located at the end of the first free end or at a distance therefrom. Furthermore, to facilitate connection with the rubber strip pressure plate, the first flange is provided with a plurality of spaced flange connection holes.

[0010] The strip pressure plate is an annular disc-shaped component arranged on the side of the first flange and capable of being connected to the first flange. The strip pressure plate includes a pressure plate body arranged opposite the first flange. The pressure plate body is annular and has a central through hole. The sealing strip is arranged between the pressure plate body and the first flange. The strip pressure plate also includes a pressure plate vertical edge, which is connected to the outer edge of the pressure plate body and extends toward the first flange. A strip placement cavity is formed between the strip pressure plate and the first flange. Similarly, a pressure plate connection hole corresponding to the flange connection hole is provided on the pressure plate body. The strip pressure plate can be pressed against the sealing strip through the locking mechanism mentioned below.

[0011] Wherein, the sealing strip is a sealing component for sealing the gap of the wire trough. Since the gap of the wire trough is annular, the corresponding sealing strip is also arranged in annular shape along the gap of the wire trough. The sealing strip is made of soft rubber. Commonly used materials include: pressure-resistant EPDM rubber, nitrile rubber, chloroprene rubber, fluororubber or silicone. The sealing strip has a certain deformation ability when squeezed. Preferably, at least part of the sealing strip is arranged in the strip placement cavity formed between the first flange and the strip pressure plate. Under the squeezing action of the strip pressure plate, the sealing strip can be radially deformed and bulged and pressed against the outer wall of the second free end. In order to further improve the deformation ability and sealing performance of the sealing strip, from the cross-section, the sealing strip is a hollow structure, and a plurality of ribs are provided on the side of the outer wall of the sealing strip facing the second free end.

[0012] The support frame is a frame-shaped reinforcing member connected to the inner side of the second connecting tube, and plays a good supporting role from the inside to the outside. In one embodiment, the second connecting tube is a rectangular parallelepiped, and the tube body is formed by connecting four walls. The support frame is in the shape of a quadrilateral frame, and each side is connected to a wall. Of course, as an equivalent technical solution, the second connecting tube can also be a circular or other polygonal structure, and the support frame can also be a circular frame or a corresponding polygonal structure. Furthermore, in order to improve the structural strength of the support frame, the cross-section of the support frame is square, cross-shaped, I-shaped or L-shaped.

[0013] The area on the outer wall of the second free end that bears the extrusion force of the sealing strip corresponds internally and externally to the support area on the inner wall of the second free end supported by the support frame, meaning that the area below the position interval where the sealing strip is extruded from the second free end is also the area where the support frame is placed. Of course, the internal and external correspondence between the two areas includes the situation where the two areas completely overlap. However, due to certain errors in manufacturing and installation, the extrusion area and the support area may not completely overlap. As long as the two areas partially overlap or are arranged adjacent to each other, they are still within the corresponding range.

[0014] According to the above technical solution, compared with the prior art, the beneficial technical effects of the present invention are:

[0015] First, by providing the first connecting tube and the second connecting tube that can be movably plugged into each other, the installation length of the connecting tube can be adjusted in real time during actual installation by movably extending and contracting the two connecting tubes, which effectively solves the problem of dimensional error in the busbar connecting tube during installation and reduces engineering waste;

[0016] Second, by providing the first flange, the rubber strip pressure plate, and the sealing rubber strip, a sealing structure is formed at the outer opening or inside of the wire trough gap. The rubber strip pressure plate not only allows the sealing rubber strip to be stably arranged at the outer opening or inside of the wire trough gap, thereby reducing the problem of the sealing rubber strip falling off; further, the rubber strip pressure plate can also squeeze the sealing rubber strip so that the sealing rubber strip is pressed against the outer side wall of the second free end with a certain pressing force, thereby sealing the outer opening or inside of the wire trough gap; compared with the existing technology, this sealing structure greatly improves the sealing performance of the two connecting pipes, which is conducive to increasing the service life of the transformer product;

[0017] Third, since the tube walls of the first connecting tube and the second connecting tube are generally designed to be relatively flat, they are prone to dents or deformation when squeezed by the sealing strip, which greatly affects the sealing performance of the product. For this reason, a support frame is provided on the inner side of the second free end, which can greatly improve the structural strength of the tube body of the second free end. The support frame can offset the squeezing force of the sealing strip, which not only reduces the deformation of the second free end but also greatly improves the sealing performance of the connection.

[0018] A further technical solution may further include a locking mechanism connected to the first flange and the rubber strip pressure plate. By adjusting the locking mechanism, the rubber strip pressure plate can be pressed against the sealing rubber strip, thereby deforming the sealing rubber strip. The locking mechanism may be a screw, a nut, an elastic lock, or the like.

[0019] To enhance the sealing effect, the central through-hole of the pressure plate body of the strip pressure plate has a diameter of d0, the inner circumference of the first free end is d1, and the outer circumference of the second free end is d2, where d1>d0≥d2. This configuration allows the inner edge of the pressure plate body to extend beyond the wire slot gap. This not only increases the connection area between the pressure plate body and the sealing strip, ensuring that the strip is fully squeezed to enhance its sealing effect, but also reduces the amount of protrusion of the strip toward the outside of the wire slot gap, thereby protecting the strip and improving its service life.

[0020] A further technical solution may also include a rain shield, which covers at least the outer opening of the gap between the first flange and the wire trough.

[0021] In order to fix the rain shield, a first fixing ear and a second fixing ear are respectively provided on the first connecting tube and the second connecting tube. The rain shield can be detachably connected to the first fixing ear and the second fixing ear, so that the first connecting tube and the second connecting tube are relatively positioned and bridged with the help of the rain shield.

[0022] Furthermore, the second connecting pipe includes a second fixed end, which is provided with an outwardly tilted second fixed edge at its end. A groove section is formed between the first flange and the second fixed edge. The ends of the rain shield extend axially to the outside of the first flange and the second fixed edge, respectively, thereby completely shielding the groove section. Because the space in the groove section is precisely connected to the gap in the cable trough, if rainwater falls into the groove section, it has a chance to enter the gap in the cable trough. By having the rain shield cover the groove section, the waterproof effect of the connecting pipe assembly is greatly improved.

[0023] A further technical solution may be that the rain shield is in the form of a " The "-shaped structure includes an upper baffle, a left baffle and a right baffle, wherein the lower ends of the left baffle and the right baffle form a baffle opening, and the rain shield covers the first connecting pipe and the second connecting pipe from top to bottom.

[0024] In order to prevent non-professionals from disassembling or damaging the rain shield, the first connecting pipe and the second connecting pipe, an anti-disassembly plate is also included. The two ends of the anti-disassembly plate are respectively fixedly connected to the left baffle and the right baffle of the rain shield. The anti-disassembly plate is arranged at the baffle opening and at least partially extends into the groove section.

[0025] Preferably, the anti-tamper plate includes a first anti-tamper plate and a second anti-tamper plate, wherein the first anti-tamper plate is arranged on the side of the first flange, and the second anti-tamper plate is arranged on the side of the second fixed edge. Furthermore, the first anti-tamper plate is connected to the first flange, and the second anti-tamper plate is connected to the second fixed edge.

[0026] Since the present invention has the above characteristics and advantages, it can be applied to a bus duct connecting pipe assembly with a sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the axial structure of a busbar duct connecting pipe assembly with a sealed structure;

[0028] Figure 2 This is a schematic diagram of the exploded structure of a bus duct connecting pipe assembly with a sealed structure;

[0029] Figure 3 This is a schematic diagram of the cross-sectional structure of a bus duct connecting pipe assembly with a sealed structure in the front view direction;

[0030] Figure 4 yes Figure 3 Schematic diagram of the local enlarged structure at M in the middle;

[0031] Figure 5 is a schematic structural diagram of the first connecting pipe in the axial direction;

[0032] Figure 6 is a schematic structural diagram of the second connecting pipe in the axial direction;

[0033] Figure 7 Schematic diagram of the structure of the rubber strip pressing plate in the axial direction;

[0034] Figure 8 Schematic diagram of the structure of the support frame in the axial direction;

[0035] Figure 9 Schematic diagram of the structure of the rain shield and the anti-disassembly plate in the axial direction;

[0036] Figure 10 is a schematic diagram of the cross-sectional structure of the sealing strip, showing the second cross-sectional structure;

[0037] Figure 11 is a schematic diagram of the cross-sectional structure of the sealing strip, showing the third cross-sectional structure;

[0038] Figure 12 2 is a schematic diagram of the cross-sectional structure of the sealing strip, showing the fourth cross-sectional structure. Implementation Method

[0039] The structure of the bus duct connecting pipe assembly with a sealing structure according to the technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0040] Except for those explicitly stated to be equivalent or alternative implementation schemes, the various implementation details disclosed below can be selectively applied or combined in one embodiment even if they have no direct correlation or synergistic relationship in terms of function.

[0041] like Figures 1 to 3 As shown, the busbar duct connecting pipe assembly with a sealing structure of the present invention includes a first connecting pipe 1 and a second connecting pipe 2, the first connecting pipe 1 includes a first free end 11, the second connecting pipe 2 includes a second free end 21, the inner circumference of the first free end 11 is larger than the outer circumference of the second free end 21, a portion of the second free end 21 is inserted into the first free end 11 and a wire duct gap 100 is formed in the sleeve area; a first flange 3 is provided on the first free end 11, and a rubber strip pressing plate 4 is also included, and the rubber strip pressing plate 4 is detachably connected to the first flange 3; A sealing strip 5 is arranged at the outer opening or inside of the wire trough gap 100, and when the strip pressing plate 4 is connected to the first flange 3 and tightened, the strip pressing plate 4 squeezes the sealing strip 5 so that the sealing strip 5 closes the outer opening or inside of the wire trough gap 100; it also includes a frame-shaped support frame 6, which is arranged on the inner side of the second free end 21 and supports the inner side wall of the second free end 21. The area of ​​the outer side wall of the second free end 21 that is subjected to the extrusion force of the sealing strip 5 corresponds to the inside and outside of the support area of ​​the inner side wall of the second free end 21 supported by the support frame 6.

[0042] Furthermore, the device further includes a locking mechanism 43 connected to the first flange 3 and the rubber strip pressing plate 4. By adjusting the locking mechanism 43, the rubber strip pressing plate 4 can be pressed against the sealing rubber strip 5, thereby deforming the sealing rubber strip 5. In this embodiment, the locking mechanism 43 is a screw 431 and a nut 432. The screw 431 passes through the first flange 3 and the rubber strip pressing plate 4, and the nut 432 is connected to the screw 431 to tighten the first flange 3 and the rubber strip pressing plate 4.

[0043] Specifically, such as Figure 5 and Figure 6 Shown are the first connecting tube 1 and the second connecting tube 2, which are two independently manufactured tubular components, wherein the first connecting tube 1 includes a first fixed end 12 and a first free end 11, and the second connecting tube 2 includes a second fixed end 22 and a second free end 21. The first fixed end 12 is fixedly connected to the first bus duct (not shown in the figure), and the second fixed end 22 is fixedly connected to the second bus duct (not shown in the figure). Then, by connecting the first free end 11 and the second free end 21 together, protection of the connected busbar joints can be achieved.

[0044] In order to connect the first free end 11 and the second free end 21, in this embodiment, Figure 1 and Figure 4 As shown, the smaller second free end 21 is inserted into the first free end 11, creating a wire trough gap 100 in the socketed area where the two tubes meet. This trough gap 100 is an annular space surrounding the outside of the second free end 21. To facilitate installation, the thickness L of the wire trough gap 100 is typically 3 to 10 mm. By providing the first and second connecting tubes 1 and 2 that can be flexibly connected, the installed length of the connecting tubes can be adjusted in real time during installation by allowing the two connecting tubes to move and retract. This effectively addresses the issue of dimensional errors that can occur during busbar connecting tube installation and reduces engineering waste.

[0045] In order to prevent rainwater and dust from entering the pipe through the slot 100, a sealing structure is required. Figure 1 、 Figure 3 、 Figure 4 and Figure 5As shown, in this embodiment, the first flange 3 is provided on the first free end 11. The first flange 3 is an outwardly protruding annular disc structure. The first flange 3 is a structure formed by folding the end of the tube wall of the first connecting pipe 1 outward. Of course, in an embodiment with equivalent functions, the first flange 3 can also be an independently processed annular component, which is then fixedly connected to the end of the first connecting pipe 1 by welding. The strip pressure plate 4 is an annular disc component arranged on the side of the first flange 3 and capable of being connected to the first flange 3. The strip pressure plate 4 includes a pressure plate body 41 arranged opposite to the first flange 3. In order to facilitate connection, a number of flange connection holes 31 are also provided on the first flange 3, and a pressure plate connection hole 410 corresponding to the flange connection hole 31 is provided on the pressure plate body 41. The strip pressure plate 4 can be pressed against the sealing strip 5 by the locking mechanism 43. In this embodiment, as Figure 4 As shown, the first flange 3 and the pressure plate body 41 of the rubber strip pressure plate 4 are spaced apart, that is, a rubber strip placement cavity 40 is formed between the rubber strip pressure plate 4 and the first flange 3 .

[0046] Furthermore, the sealing strip 5 is annular and arranged along the wire groove gap 100. The sealing strip 5 is made of soft rubber or silicone and has good weather resistance. Commonly used materials include: pressure-resistant EPDM rubber, nitrile rubber, chloroprene rubber, fluororubber or silicone, etc. In this embodiment, the material selected is pressure-resistant EPDM rubber with good weather resistance. The sealing strip 5 has a certain deformation ability when squeezed. In this embodiment, at least part of the sealing strip 5 is arranged in the strip placement cavity 40 formed between the first flange 3 and the strip pressure plate 4, and the locking mechanism 43 is tightened. Under the extrusion of the strip pressure plate 4 and the first flange 3, the sealing strip 5 undergoes radial deformation and bulges and is pressed against the outer wall of the second free end 21. As Figure 2 and Figure 4 As shown, the cross section of the sealing strip 5 is in the shape of a long strip, wherein the two side surfaces are in contact with the first flange 3 and the pressing plate body 41 of the strip pressing plate 4 respectively. Figure 10 The figure shows an improved embodiment of the sealing strip 5 . The sealing strip 5 is a hollow structure, and a plurality of ribs 51 are provided on one side of the outer wall of the sealing strip 5 facing the second free end 21 .

[0047] As another equivalent implementation, Figure 11As shown, the sealing strip 5 can also be L-shaped and include a vertical strip 52 and a horizontal strip 53 connected to the inner end of the vertical strip 52, wherein the vertical strip 52 is arranged in the strip placement cavity 40, and the horizontal strip 53 at least partially extends into the wire groove gap 100. In this way, when the sealing strip 5 is squeezed and deformed, the inner end of the vertical side of the sealing strip 5 and the horizontal strip 53 will be pressed against the outer wall of the second free end 21 to form a larger sealing connection surface.

[0048] As another equivalent implementation, Figure 12 The figure shows another embodiment of the sealing strip 5. The sealing strip 5 is strip-shaped and disposed within the wire trough gap 100, with at least a portion extending to the outer opening of the wire trough gap 100. Furthermore, a second flange 23 is provided on the second free end 21. The second flange 23 protrudes outward and is disposed within the wire trough gap 100, and the second flange 23 supports the outer end of the sealing strip 5. When the locking mechanism 43 is tightened, the strip pressure plate 4 presses against the outer end of the sealing strip 5 and squeezes the sealing strip 5. Under the squeezing action, the sealing strip 5 deforms and presses against the outer wall of the second free end 21 and the outer wall of the first free end 11, thereby forming a sealing structure.

[0049] By arranging the first flange 3, the rubber strip pressure plate 4 and the sealing rubber strip 5, a sealing structure is formed at the outer opening or inside of the wire trough gap 100. The rubber strip pressure plate 4 can not only allow the sealing rubber strip 5 to be stably arranged at the outer opening or inside of the wire trough gap 100, thereby reducing the problem of the sealing rubber strip 5 falling off; further, the rubber strip pressure plate 4 can also squeeze the sealing rubber strip 5 so that the sealing rubber strip 5 is pressed against the outer wall of the second free end 21 with a certain pressing force, thereby closing the outer opening or inside of the wire trough gap 100; compared with the existing technology, this sealing structure greatly improves the sealing performance of the two connecting pipes, which is beneficial to improving the service life of the transformer product.

[0050] Furthermore, the strip pressure plate 4 also includes a plate vertical edge 42, which is connected to the outer edge of the plate body 41 and extends toward the first flange 3, forming a baffle structure outside the strip placement cavity 40. Only an opening toward the second free end 21 is left between the first flange 3 and the plate body 41. This arrangement has the advantage of reducing outward bulging deformation of the sealing strip 5 when deformed, ensuring that the sealing strip 5 is pressed tightly toward the second free end 21, further improving the product's sealing performance.

[0051] To improve the sealing effect, the central through-hole of the pressure plate body 41 of the strip pressure plate 4 has a diameter of d0, the inner circumference of the first free end 11 is d1, and the outer circumference of the second free end 21 is d2, where d1>d0≥d2. This configuration allows the inner edge of the pressure plate body 41 to extend outside the cable trough gap 100. This not only increases the connection area between the pressure plate body 41 and the sealing strip 5, ensuring that the sealing strip 5 is fully squeezed to enhance the sealing effect of the sealing strip 5, but also reduces the amount of deformation of the sealing strip 5 protruding outward from the cable trough gap 100, thereby protecting the sealing strip 5 and improving its service life.

[0052] like Figures 1 to 4 As shown, the tube walls of the first connecting tube 1 and the second connecting tube 2 are generally designed to be relatively flat. When squeezed by the sealing strip 5, they are prone to dents or deformation, which greatly affects the sealing performance of the product. For this reason, a support frame 6 is provided on the inner side of the second free end 21, which can greatly improve the structural strength of the tube body of the second free end 21. The support frame 6 can offset the squeezing force of the sealing strip 5, which not only reduces the deformation of the second free end 21 but also greatly improves the sealing performance of the connection. The support frame 6 is a frame-shaped reinforcement member connected to the inner side of the second connecting tube 2, and plays a good supporting role from the inside to the outside. In this embodiment, as shown in FIG. Figure 2 and Figure 8 As shown, the second connecting pipe 2 is a rectangular parallelepiped, and the pipe body is formed by connecting four walls. The support frame 6 is also in the shape of a quadrilateral frame, and each side is connected to a wall. Of course, as an equivalent technical solution, the second connecting pipe 2 can also be a circular or other polygonal structure, and the support frame 6 can also be a circular frame or a corresponding polygonal structure. In order to improve the structural strength of the support frame 6, the cross-section of the support frame 6 is square, cross-shaped, I-shaped or L-shaped, etc. Figure 4 and Figure 11 As shown, the cross section of the support frame 6 in this embodiment is in the shape of a Chinese numeral 5 .

[0053] The area on the outer side of the second free end 21 that bears the extrusion force of the sealing strip 5 corresponds internally and externally to the support area on the inner side of the second free end 21 where the support frame 6 supports the second free end 21. This means that the area below the position interval where the sealing strip 5 is extruded from the second free end 21 is also the area where the support frame 6 is placed. Of course, the internal and external correspondence between the two areas includes the situation where the two areas completely overlap. However, due to certain errors in manufacturing and installation, the extrusion area and the support area may not completely overlap. As long as the two areas partially overlap or are arranged adjacent to each other, they are still within the corresponding range.

[0054] A further technical solution may also include a rain shield 7, which covers at least the outer opening of the first flange 3 and the wire trough gap 100 to block external rainwater and reduce the amount of rainwater entering the pipe through the wire trough gap 100. Figure 1 、 Figure 2 and Figure 9 As shown, the rain shield 7 is " The rain shield 7 includes an upper baffle 71, a left baffle 72 and a right baffle 73. The lower ends of the left baffle 72 and the right baffle 73 form a baffle opening, and the rain shield 7 covers the first connecting pipe 1 and the second connecting pipe 2 from top to bottom.

[0055] like Figures 1 to 3 as well as Figure 9 As shown, in order to fix the rain shield 7, a first fixing ear 14 and a second fixing ear 24 are respectively provided on the first connecting tube 1 and the second connecting tube 2, and a first strip hole 74 and a second strip hole 75 are provided on the left baffle 72 and the right baffle 73 on the rain shield 7, wherein the first strip hole 74 corresponds to the first fixing ear 14, and the second strip hole 75 corresponds to the second fixing ear 24. The rain shield 7 is detachably connected to the first fixing ear 14 and the second fixing ear 24, so that the first connecting tube 1 and the second connecting tube 2 are relatively positioned and bridged with the help of the rain shield 7.

[0056] Furthermore, an outwardly tilted second fixing edge 221 is provided at the end of the second fixing end 22, forming a groove section 200 between the first flange 3 and the second fixing edge 221. Both ends of the rain shield 7 extend axially to the outside of the first flange 3 and the second fixing edge 221, thereby completely shielding the groove section 200. Because the space in the groove section 200 is precisely connected to the wire trough gap 100, if rainwater falls into the groove section 200, it has a chance to enter the wire trough gap 100. By having the rain shield 7 shield the groove section 200, the waterproof effect of the connecting pipe assembly is greatly improved.

[0057] Because some substations are located outdoors, in order to protect the substation equipment, a structure is required on the connecting pipe to prevent non-professionals from disassembling or damaging it privately. To this end, the rain shield 7 also includes an anti-disassembly plate 8, the two ends of which are fixedly connected to the left baffle 72 and the right baffle 73 of the rain shield 7, respectively. The anti-disassembly plate 8 is set at the baffle opening and at least partially extends into the groove section 200. Figure 9As shown, in this embodiment, the anti-disassembly plate 8 includes a first anti-disassembly plate 81 and a second anti-disassembly plate 82, the first anti-disassembly plate 81 is arranged on the side of the first flange 3, and the second anti-disassembly plate 82 is arranged on the side of the second fixed edge 221. Furthermore, the first anti-disassembly plate 81 is connected to the first flange 3, and the second anti-disassembly plate 82 is connected to the second fixed edge 221. In this embodiment, the anti-disassembly plate 8 is fixedly connected to the left baffle 72 and the right baffle 73 by means of blind rivets, wherein the blind rivets are installed and used once during riveting and can only be disassembled by destruction. In addition to being able to fix the opening of the rain shield 7, the anti-disassembly plate 8 effectively prevents the rain shield 7 from being disassembled privately by non-professionals; the two anti-disassembly plates 8 can further limit the forward and backward movement position of the rain shield 7.

Claims

1. A busbar trunking connecting pipe assembly with a sealed structure, comprising a first connecting pipe and a second connecting pipe, wherein the first connecting pipe comprises a first free end, the second connecting pipe comprises a second free end, the inner circumference of the first free end is larger than the outer circumference of the second free end, a portion of the second free end is inserted into the first free end, and a trunking gap is formed in the sleeve area; characterized in that: A first flange is provided on the first free end, and the rubber strip pressure plate is detachably connected to the first flange; a sealing rubber strip is arranged at the outer opening or the inner part of the wire trough gap, and when the rubber strip pressure plate is connected to the first flange and tightened, the rubber strip pressure plate squeezes the sealing rubber strip so that the sealing rubber strip seals the outer opening or the inner part of the wire trough gap; and a frame-shaped support frame is also included, which is arranged on the inner side of the second free end and supports the inner side wall of the second free end, and the area of ​​the outer side wall of the second free end subjected to the extrusion force of the sealing rubber strip corresponds to the inside and outside of the support area of ​​the inner side wall of the second free end supported by the support frame.

2. The bus duct connecting pipe assembly with a sealing structure according to claim 1, characterized in that: It also includes a locking mechanism, which is connected to the first flange and the rubber strip pressing plate. By adjusting the locking mechanism, the rubber strip pressing plate can squeeze the sealing rubber strip to deform the sealing rubber strip.

3. The bus duct connecting pipe assembly with a sealing structure according to claim 2, characterized in that: The rubber strip pressure plate includes a pressure plate body arranged opposite to the first flange, the pressure plate body is annular and has a middle through hole, the sealing rubber strip is arranged between the pressure plate body and the first flange, the rubber strip pressure plate also includes a pressure plate vertical edge, the pressure plate vertical edge is connected to the outer edge of the pressure plate body and extends toward the first flange, and a rubber strip placement cavity is formed between the rubber strip pressure plate and the first flange.

4. The bus duct connecting pipe assembly with a sealing structure according to claim 3, characterized in that: The diameter of the middle through hole of the pressing plate body of the strip pressing plate is d0, the inner circumference of the first free end is d1, and the outer circumference of the second free end is d2, wherein d1>d0≥d2.

5. The bus duct connecting pipe assembly with a sealing structure according to any one of claims 1 to 4, characterized in that: It also includes a rain shield, which covers at least the outer opening of the gap between the first flange and the wire trough.

6. The bus duct connecting pipe assembly with a sealing structure according to claim 5, characterized in that: A first fixing ear and a second fixing ear are respectively provided on the first connecting tube and the second connecting tube, and the rain shield is detachably connected to the first fixing ear and the second fixing ear, so that the first connecting tube and the second connecting tube are relatively positioned and bridged by means of the rain shield.

7. The bus duct connecting pipe assembly with a sealing structure according to claim 5, characterized in that: The second connecting pipe also includes a second fixed end, on the end of which is provided a second fixed edge turned outward, a groove section is formed between the first flange and the second fixed edge, and both ends of the rain shield extend axially to the outside of the first flange and the second fixed edge respectively, thereby completely covering the groove section.

8. The bus duct connecting pipe assembly with a sealing structure according to claim 7, characterized in that: The rain shield is The "-shaped structure includes an upper baffle, a left baffle and a right baffle, wherein the lower ends of the left baffle and the right baffle form a baffle opening, and the rain shield covers the first connecting pipe and the second connecting pipe from top to bottom.

9. The bus duct connecting pipe assembly with a sealing structure according to claim 8, characterized in that: It also includes an anti-disassembly plate, the two ends of which are respectively fixedly connected to the left baffle and the right baffle of the rain shield. The anti-disassembly plate is arranged at the baffle opening and at least partially extends into the groove section.

10. The bus duct connecting pipe assembly with a sealing structure according to claim 9, characterized in that: The anti-disassembly plate includes a first anti-disassembly plate and a second anti-disassembly plate, wherein the first anti-disassembly plate is arranged on the side of the first flange, and the second anti-disassembly plate is arranged on the side of the second fixed edge.

11. The bus duct connecting pipe assembly with a sealing structure according to claim 10, characterized in that: The first anti-disassembly plate is connected to the first flange, and the second anti-disassembly plate is connected to the second fixed edge.

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