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 connecting portion of the bus duct in equipment such as transformers and power distribution cabinets. Background Art

[0002] The prefabricated substation is equipped with high-voltage cabinets, low-voltage cabinets, transformers and other equipment. The low-voltage cabinets and transformers use soft copper bars to connect the busbars. In general applications, the connection between the low-voltage cabinet and the transformer is generally not protected by a protective structure, which makes the connection exposed to the outside world for a long time. Not only will it be affected by wind and rain erosion, affecting the service life of the connector, but it may also cause a short circuit due to the falling and entanglement of foreign objects, thus affecting the overall safety of the substation. Therefore, a protective cover needs to be installed at the busbar connection to protect the busbar and the connector, and the protective cover and the busbar are insulated to ensure the safe operation of the equipment. However, the general protective cover is a non-standard part. In the design of each prefabricated substation of different models, the protective cover needs to be independently designed and manufactured according to the on-site space, which greatly increases the design workload and manufacturing cost. In addition, when installing the protective cover, the structure is often difficult to install or even impossible to install due to manufacturing errors in the protective cover, hole position and other structures. This situation will have a great impact on the delivery efficiency of the prefabricated substation.

[0003] For this reason, people have improved the structure of the protective cover. For example, the Chinese utility model patent with the publication number CN217406124U discloses a fire-resistant busbar expansion unit, including a first connecting tube shell and a second connecting tube shell, the top and bottom ends of the first connecting tube shell and the second connecting tube shell are fixedly connected with a cover plate by bolts, and a expansion assembly is fixedly connected between the opposite ends of the first connecting tube shell and the second connecting tube shell, and the expansion assembly includes a first expansion shell and a second expansion shell. Under the cooperation of the first expansion shell and the second expansion shell, the second expansion shell can be adjusted to slide inside the second expansion shell, thereby realizing the expansion function. The expansion assembly can well solve the problem of dimensional error of the protective cover during installation, reducing engineering waste.

[0004] A Chinese utility model patent with publication number CN217406124U discloses a solution for improving the sealing effect of the connection of the telescopic assembly. A limiting groove is provided on the inner periphery of the first limiting baffle, and a sealing strip is fixedly connected inside the limiting groove. However, the patent does not describe the specific connection structure of the seal. Because transformer substations are generally installed and used outdoors, the use conditions are not only complex but also very harsh. Common application environments may include hot and high temperatures, freezing and low temperatures, wind and rain, hail, sandstorms, etc. Therefore, the use of simple sealing strips for sealing in the prior art may not be able to cope with harsh use environments, and it is necessary to further improve the structure of the connecting pipe. Summary of the invention

[0005] In order to overcome the problems existing in the prior art, the present invention proposes a bus 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 sleeve area; characterized in that a first flange is arranged on the first free end, and also 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; and also comprising a frame-shaped support frame, the support frame being arranged on the inner side of the second free end and supporting the inner side wall of the second free end, the area where the outer side wall of the second free end bears 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 connecting tube and the second connecting tube refer to two independently manufactured tubular components. The first connecting tube includes a first fixed end and a first free end, and the second connecting tube includes a second fixed end and a second free end. Usually, the two connected busbars include not only the exposed connected busbar joints, but also the busbar body protected by the busbar duct. The first fixed end and the second fixed end are fixedly connected to the two busbar ducts, respectively, and the connected busbar joints can be protected by connecting the first free end of the first connecting tube with the second free end of the second connecting tube.

[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] Among them, the wire slot gap, since 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 space is formed between the outer wall of the second free end and the inner wall of the first free end. For the convenience of installation, the single-side thickness of the wire slot gap is generally 3-10mm. However, due to the large thickness of the wire slot gap, although it is convenient for installation, moisture and impurities can easily pass through and enter the first connecting pipe and the second connecting pipe.

[0009] The first flange is an annular disc-shaped structure protruding outwardly on the first free end. The specific implementation structure of the first flange can be a vertical edge of the end wall of the first free end turned outward by machining, or it can be an independently processed annular component fixed to the first free end by welding or adhesion. Therefore, the first flange can be set at the end of the first free end or leave a certain distance from the end. Furthermore, in order to be connected with the rubber strip pressure plate, a plurality of flange connection holes arranged at intervals are also provided on the first flange.

[0010] The strip pressure plate is an annular disc-shaped component arranged on the side of the first flange and can be connected to the first flange. The 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 strip is arranged between the pressure plate body and the first flange. The 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. 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, and 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 used to seal the gap of the wire groove. Since the gap of the wire groove is annular, the corresponding sealing strip is also arranged in annular shape along the gap of the wire groove. The sealing strip is made of soft rubber, and 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, and under the extrusion of the strip pressure plate, the sealing strip can be radially deformed and convex 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 convex ribs are arranged on the side of the outer wall of the sealing strip facing the second free end.

[0012] Among them, the support frame is a frame-shaped reinforcing member, which is 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, I-shaped, I-shaped or L-shaped.

[0013] Among them, the area where the outer wall of the second free end bears the extrusion force of the sealing strip corresponds inside and outside to the support area where the support frame supports the inner wall of the second free end, which means that the area below the position interval where the sealing strip is extruded at the second free end is also the area where the support frame is placed. Of course, the inside and outside correspondence between the two areas includes the situation where the two areas completely overlap, but 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 the two areas are arranged adjacent to each other, it is also 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: First, by providing the first connecting tube and the second connecting tube that can be movably plugged into each other, during actual installation, the installation length of the connecting tube can be adjusted in real time by movably extending and retracting the two connecting tubes, which well solves the problem of dimensional error of the busbar connecting tube during installation and reduces engineering waste; 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 slot gap. The rubber strip pressure plate can not only stably arrange the sealing rubber strip at the outer opening or inside of the wire slot gap, that is, reduce 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 closing the outer opening or inside of the wire slot gap; compared with the prior art, this sealing structure greatly improves the sealing performance of the two connecting pipes, which is conducive to improving the service life of the transformer product; Third, since the tube walls of the first connecting tube and the second connecting tube are generally designed to be relatively flat, they will easily dent or deform 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.

[0015] A further technical solution may also include a locking mechanism, wherein the locking mechanism is connected to the first flange and the rubber strip pressing plate, and the rubber strip pressing plate can be adjusted to squeeze the sealing rubber strip so that the sealing rubber strip is deformed. The locking mechanism may be a screw, a nut, an elastic lock, or the like.

[0016] In order to improve the sealing effect, the aperture of the middle through hole of the pressure plate body of the strip pressure 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. The inner edge of the pressure plate body configured in this way is equivalent to extending to the outside of the wire slot gap, which not only increases the connection area between the pressure plate body and the sealing rubber strip, ensuring that the sealing rubber strip can be fully squeezed to improve the sealing effect of the sealing rubber strip; at the same time, the pressure plate body can also reduce the amount of protrusion deformation of the sealing rubber strip to the outside of the wire slot gap, that is, it plays the purpose of protecting the sealing rubber strip, which is conducive to improving the service life of the sealing rubber strip.

[0017] A further technical solution may also include a rain shield, wherein the rain shield at least covers the outer opening of the gap between the first flange and the wire trough.

[0018] 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, 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 with the help of the rain shield.

[0019] Furthermore, the second connecting pipe also includes a second fixed end, and a second fixed edge turned outward is provided on the end of the second fixed end, a groove section is formed between the first flange and the second fixed edge, and the two ends of the rain shield extend axially to the outside of the first flange and the second fixed edge respectively, so as to completely cover the groove section. Because the space of the groove section can be connected with the gap of the wire groove, if rain falls into the groove section, it has a chance to enter the gap of the wire groove, and the waterproof effect of the connecting pipe assembly can be well improved by allowing the rain shield to cover the groove section.

[0020] A further technical solution may be that the rain shield is in the form of a " The rain shield 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.

[0021] 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 which are respectively fixedly connected to the left baffle and the right baffle of the rain shield, and the anti-disassembly plate is arranged at the baffle opening and at least partially extends into the groove section.

[0022] Preferably, 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. Further, the first anti-disassembly plate is connected to the first flange, and the second anti-disassembly plate is connected to the second fixed edge.

[0023] 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

[0024] Figure 1 It is a schematic diagram of the axial structure of a bus duct connecting pipe assembly with a sealing structure; Figure 2 It is a schematic diagram of the exploded structure of a bus duct connecting pipe assembly with a sealing structure; Figure 3 It is a schematic diagram of the cross-sectional structure of a bus duct connecting pipe assembly with a sealing structure in the front view direction; Figure 4 yes Figure 3 A schematic diagram of the local enlarged structure at M in the middle; Figure 5 is a schematic diagram of the structure of the first connecting pipe in the axial direction; Figure 6 is a schematic diagram of the structure of the second connecting pipe in the axial direction; Figure 7 is a schematic diagram of the structure of the rubber strip pressing plate in the axial direction; Figure 8 is a schematic diagram of the structure of the support frame in the axial direction; Fig. 9 It is a schematic diagram of the axial structure of the rain shield and the anti-disassembly plate; Fig.10 is a schematic diagram of the cross-sectional structure of the sealing strip, showing the second cross-sectional structure; Fig.11 is a schematic diagram of the cross-sectional structure of the sealing strip, showing the third cross-sectional structure; Fig.12 is a schematic diagram of the cross-sectional structure of the sealing strip, showing the fourth cross-sectional structure. Implementation

[0025] The structure of the bus duct connecting pipe assembly with a sealing structure applying the technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0026] 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 are not directly related or synergistic in terms of functions.

[0027] like Figure 1~Figure 3 As shown, a 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, wherein the first connecting pipe 1 includes a first free end 11, and the second connecting pipe 2 includes a second free end 21, wherein the inner circumference of the first free end 11 is larger than the outer circumference of the second free end 21, and 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 provided, 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, and 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 support frame 6 supporting the inner side wall of the second free end 21.

[0028] Furthermore, a locking mechanism 43 is included, and the locking mechanism 43 is 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 squeeze the sealing rubber strip 5 so that the sealing rubber strip 5 is deformed. 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 and tightens the first flange 3 and the rubber strip pressing plate 4.

[0029] Specifically, Figure 5 and Figure 6Shown 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 a first bus duct (not shown in the figure), and the second fixed end 22 is fixedly connected to a second bus duct (not shown in the figure), respectively, and then the first free end 11 and the second free end 21 are connected together to protect the connected bus joints.

[0030] In order to connect the first free end 11 with the second free end 21, in this embodiment, Figure 1 and Figure 4 As shown, the second free end 21 with a smaller size is inserted into the first free end 11, so that a wire slot gap 100 is formed in the socket area where the two pipes are plugged in. The wire slot gap 100 is an annular space surrounding the outside of the second free end 21. Generally, for the convenience of installation, the single-side thickness L of the wire slot gap 100 is generally 3-10 mm. By providing the first connecting pipe 1 and the second connecting pipe 2 that can be movably plugged in, the installation length of the connecting pipe can be adjusted in real time during actual installation through the movable extension of the two connecting pipes, which well solves the problem of dimensional error of the busbar connecting pipe during installation and reduces engineering waste.

[0031] In order to prevent rainwater and dust from entering the pipe through the slot gap 100, a sealing structure is required. Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the first flange 3 is arranged on the first free end 11, and the first flange 3 is an outwardly protruding annular disc structure, and the first flange 3 is a structure formed by folding the end of the tube wall of the first connecting tube 1 outward. Of course, in an embodiment with equivalent functions, the first flange 3 can also be an independently processed annular component, and then fixedly connected to the end of the first connecting tube 1 by welding. The rubber strip pressure plate 4 is an annular disc-shaped component arranged on the side of the first flange 3 and capable of being connected to the first flange 3, and the rubber strip pressure plate 4 includes a pressure plate body 41 arranged opposite to the first flange 3. In order to facilitate connection, a plurality of flange connection holes 31 arranged at intervals 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, and the locking mechanism 43 can be used to press the rubber strip pressure plate 4 against the sealing rubber strip 5. In this embodiment, as Figure 4As shown, the first flange 3 and the pressure plate body 41 of the rubber strip pressure plate 4 are arranged at an interval, that is, a rubber strip placement cavity 40 is formed between the rubber strip pressure plate 4 and the first flange 3 .

[0032] 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. 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. Fig.10 The figure shows an improved form 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 .

[0033] As another equivalent implementation, Fig.11 As 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 slot 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 side wall of the second free end 21 to form a larger sealing connection surface.

[0034] As another equivalent implementation, Fig.12The figure shows another embodiment of the sealing strip 5, wherein the sealing strip 5 is arranged in a strip shape inside the wire slot gap 100 and has at least a portion extending to the outer opening of the wire slot gap 100; further, a second flange 23 is also arranged on the second free end 21, the second flange 23 protrudes outward and is arranged inside the wire slot 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 pressing plate 4 presses on the outer end of the sealing strip 5 and squeezes the sealing strip 5, and the sealing strip 5 is deformed under the squeezing action and pressed on the outer wall of the second free end 21 and the outer wall of the first free end 11, thereby forming a sealing structure.

[0035] By providing 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 the inside of the wire slot 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 the inside of the wire slot gap 100, that is, reduce 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 side wall of the second free end 21 with a certain pressing force, thereby closing the outer opening or the inside of the wire slot gap 100; compared with the prior art, 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.

[0036] 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, that is, a baffle structure is formed outside the strip placement cavity 40, and only an opening toward the second free end 21 is left at one end of the first flange 3 and the plate body 41. This arrangement has the advantage of reducing the convex deformation of the sealing strip 5 toward the outside when it is deformed, ensuring that the sealing strip 5 is pressed toward one side of the second free end 21, and further improving the sealing of the product.

[0037] To improve the sealing effect, the aperture of the middle through-hole of the pressing plate body 41 of the rubber strip pressing plate 4 is d0, the inner peripheral dimension of the first free end 11 is d1, and the outer peripheral dimension of the second free end 21 is d2, where d1 > d0 ≥ d2. With such a setting, the inner edge of the pressing plate body 41 is equivalent to extending to the outside of the wire groove gap 100. This not only increases the connection area between the pressing plate body 41 and the sealing rubber strip 5, ensuring that the sealing rubber strip 5 can be fully squeezed to improve the sealing effect of the sealing rubber strip 5; at the same time, the pressing plate body 41 can also reduce the amount of convex deformation of the sealing rubber strip 5 towards the outside of the wire groove gap 100, that is, it serves the purpose of protecting the sealing rubber strip 5 and is beneficial to improving the service life of the sealing rubber strip 5.

[0038] As Figure 1~Figure 4 shown, the tube walls of the first connecting tube 1 and the second connecting tube 2 are generally designed to be relatively flat and are prone to denting or deformation when being squeezed by the sealing rubber strip 5, which greatly affects the sealing performance of the product. Therefore, a support frame 6 is arranged inside the second free end 21, which can greatly improve the structural strength of the tube body of the second free end 21. Through the support frame 6, the extrusion force of the sealing rubber strip 5 can be offset, which not only reduces the deformation of the second free end 21 but also greatly improves the sealing performance of the connection part. The support frame 6 is a frame-shaped strengthening member, connected to the inside of the second connecting tube 2, and plays a good supporting role from the inside out. In this embodiment, as Figure 2 with Figure 8 shown, the second connecting tube 2 is in the shape of a cuboid, and the tube body is formed by connecting four wall bodies. The support frame 6 is also in the shape of a quadrilateral square frame, and each side is respectively connected to a wall body. Of course, as an equivalent technical solution, the second connecting tube 2 can also be circular or other polygonal structures, and the support frame 6 can also be in the shape of a circular frame or a corresponding polygonal structure. To improve the structural strength of the support frame 6, the cross-section of the support frame 6 is square, U-shaped, I-shaped or L-shaped, etc. As Figure 4 with Fig.11 shown, the cross-section of the support frame 6 in this embodiment is U-shaped.

[0039] Among them, the area on the outer side wall of the second free end 21 that bears the extrusion force of the sealing rubber strip 5 and the support area of the support frame 6 that supports the inner side wall of the second free end 21 correspond to each other inside and outside, which means that the area directly below the position interval where the sealing rubber strip 5 squeezes on the second free end 21 is exactly the area where the support frame 6 is placed. Of course, the inside and outside correspondence of the two areas includes the case where the two areas completely overlap. However, due to certain manufacturing and installation errors, the extrusion area and the support area may not completely overlap. As long as the two areas partially overlap or the two areas are arranged adjacent to each other, it is also within the corresponding range.

[0040] A further technical solution may also include a rain shield 7, which covers at least the first flange 3 and the outer opening of the wire slot gap 100 to shield external rainwater to reduce the amount of rainwater entering the pipe from the wire slot gap 100. Figure 1 , Figure 2 and Fig. 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, wherein the lower ends of the left baffle 72 and the right baffle 73 form baffle openings, and the rain shield 7 covers the first connecting pipe 1 and the second connecting pipe 2 from top to bottom.

[0041] like Figure 1~Figure 3 as well as Fig. 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 plate 72 and the right baffle plate 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, and 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 by means of the rain shield 7.

[0042] Furthermore, a second fixed edge 221 turned outward is provided at the end of the second fixed end 22, a groove section 200 is formed between the first flange 3 and the second fixed edge 221, and both ends of the rain shield 7 extend axially to the outside of the first flange 3 and the second fixed edge 221 respectively, thereby completely shielding the groove section 200. Because the space of the groove section 200 can be connected with the wire slot gap 100, if rain falls into the groove section 200, it has a chance to enter the wire slot gap 100, and the waterproof effect of the connecting pipe assembly can be well improved by allowing the rain shield 7 to shield the groove section 200.

[0043] Because some substations are arranged outdoors, in order to protect the substation equipment, it is necessary to set a structure on the connecting pipe to prevent non-professionals from disassembling or damaging it privately. For this reason, the rain shield 7 also includes an anti-disassembly plate 8, the two ends of which are respectively fixedly connected to the left baffle 72 and the right baffle 73 of the rain shield 7. The anti-disassembly plate 8 is set at the opening of the baffle and at least partially extends into the groove section 200. Fig. 9As shown, in this embodiment, the anti-disassembly plate 8 includes a first anti-disassembly plate 81 and a second anti-disassembly plate 82, wherein 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 fixing the opening of the rain shield 7, the anti-disassembly plate 8 can effectively prevent 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 duct connecting pipe assembly with a sealing 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 wire duct gap is formed in the sleeve area; characterized in that: A first flange is arranged on the first free end, and also includes a rubber strip pressing plate, which 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 pressing plate is connected to the first flange and tightened, the rubber strip pressing 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; also includes a frame-shaped support frame, 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 that is subjected to the extrusion force of the sealing rubber strip corresponds inside and outside to 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 is characterized in that: The aperture of the middle through hole of the pressing plate body of the strip pressing plate is d0, the inner circumference size of the first free end is d1, and the outer circumference size 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: The first connecting tube and the second connecting tube are respectively provided with a first fixing ear and a second fixing ear, 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 so as to completely cover 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 rain shield 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 plate and the right baffle plate of the rain shield, and 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 a side of the first flange, and the second anti-disassembly plate is arranged on a 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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