Wall bushing damping installation device, wall bushing assembly and wall bushing installation structure

Abstract

The invention provides a wall bushing damping installation device, a wall bushing assembly and a wall bushing installation structure, and belongs to the technical field of devices for enabling a pipe, a cable or a protective pipe to pass through a wall or a partition plate. The damping installation device comprises an outer fixing body fixed to the wall body, an inner fixing body which is located in the installation hole and used for the wall bushing to penetrate through and fix the wall bushing, a damping device connected between the inner fixing body and the outer fixing body, and a sealing cover which is connected with the inner fixing body and the outer fixing body and can deform. The sealing cover comprises an outer connecting part which surrounds the mounting hole and is fixedly connected with the outer fixing body, an inner connecting part which surrounds the wall bushing through hole in the inner fixing body and is fixedly connected with the inner fixing body, and a closed body which continuously extends from the inner connecting part to the outer connecting part. The anti-seismic effect of the damping installation device is guaranteed, the damping installation device has the sealing performance, external air and pollutants can be effectively prevented from entering the valve hall, and safe operation of electric power system equipment in the converter station is guaranteed.

Description

Technical Field

[0001] The invention relates to a wall bushing shock-absorbing installation device, a wall bushing assembly and a wall bushing installation structure, belonging to the technical field of devices for allowing pipes, cables or protective pipes to pass through walls or partitions. Background Art

[0002] Converter stations are crucial components of HVDC transmission lines. Damage from a strong earthquake could paralyze the power system. Wall bushings, installed on the walls of the converter station's valve hall, are critical electrical equipment connecting the valve hall and the external DC field. During a strong earthquake, vibrations are transmitted through the walls of the valve hall to the bushings, potentially damaging or even breaking the bushings at their base. These bushings can also pull on other electrical equipment, leading to chain reactions. Even minor earthquakes can damage the bushings, potentially causing air leaks and shortening their service life.

[0003] In this regard, Chinese invention patent application publication number CN118816008A discloses a shock-absorbing device for wall bushings. The shock-absorbing device comprises a connecting mechanism, a shock-absorbing mechanism, and a mounting mechanism. The connecting mechanism (i.e., an external fixing body) is fixed to the wall, and the mounting mechanism (i.e., an internal fixing body) is located inside the connecting mechanism and is used to secure the wall bushing. The shock-absorbing mechanism (i.e., a shock-absorbing device) connects the mounting and connecting mechanisms. The shock-absorbing mechanism comprises a guide rod disposed on the connecting mechanism, a movable portion connected to the guide rod, and buffer portions disposed on either side of the movable portion. The movable portion is capable of driving the mounting mechanism and the wall bushing along the guide rod and compressing the buffer portion to elastically deform, thereby buffering the forces generated by earthquakes.

[0004] There is also a Chinese invention patent application with application publication number CN119665053A that discloses a shock-absorbing device and a wall-penetrating sleeve shock-absorbing structure. The wall-penetrating sleeve shock-absorbing structure includes an installation inner frame and a shock-absorbing unit connected between the installation inner frame and the valve hall wall. A mounting hole is provided on the valve hall wall, and the installation inner frame is located in the mounting hole. The shock-absorbing unit includes multiple shock-absorbing devices (i.e., shock-absorbing components). The wall-penetrating sleeve is connected to the installation inner frame (i.e., the internal fixed body). The shock-absorbing device can reduce the impact of the shaking of the valve hall wall on the wall-penetrating sleeve during earthquakes or external shaking.

[0005] Both patent applications guarantee the seismic performance of wall bushings. However, because the damping components are spaced between the inner and outer fixtures, or between the inner fixture and the wall mounting hole, gaps exist between them. In power system converter stations, the valve hall must be kept clean and maintain a certain humidity level. Otherwise, the converter station will be affected by humidity, dust, dirt, and other contaminants during operation. Currently, outside air and contaminants can enter the valve hall through these gaps, reducing the humidity inside. These contaminants gradually accumulate on and within the power equipment, affecting its heat dissipation, insulation, and conductivity, ultimately impacting its safe operation. For example, dust accumulation on the transformer surface can hinder heat dissipation, causing temperatures to rise, impacting its service life and performance. Dirt inside switchgear can degrade insulation and increase the risk of short circuits. The breakdown voltage of the static VAR generator (SVG) gap decreases with decreasing air pressure, density, and humidity. Summary of the Invention

[0006] The object of the present invention is to provide a shock-absorbing installation device for a wall bushing to solve the problem in the prior art that, while ensuring the seismic performance of the wall bushing, external air and pollutants can enter the inner side of the wall through the gap between the inner fixing body and the outer fixing body, thereby affecting the safe operation of the power equipment; the object of the present invention is also to provide a wall bushing assembly to solve the above-mentioned problem; the object of the present invention is also to provide a wall bushing installation structure to solve the problem in the prior art that, while ensuring the seismic performance of the wall bushing, external air and pollutants can enter the inner side of the wall through the gap between the inner fixing body and the wall mounting hole, thereby affecting the safe operation of the power equipment.

[0007] To achieve the above objectives, the wall bushing shock-absorbing installation device of the present invention adopts the following technical solutions: A wall sleeve shock-absorbing installation device includes an external fixing body for fixing on a wall and having a mounting hole, an internal fixing body located in the mounting hole for allowing the wall sleeve to pass through and fixing the wall sleeve, and a shock-absorbing device connected between the internal fixing body and the external fixing body. It also includes a sealing cover connected to both the internal fixing body and the external fixing body and capable of deforming with the movement of the internal fixing body or the external fixing body. The sealing cover includes an external connecting portion fixedly connected to the external fixing body around the mounting hole, an internal connecting portion fixedly connected to the internal fixing body around the wall sleeve through-hole on the internal fixing body, and a closing body continuously extending from the internal connecting portion to the external connecting portion to close the gap between the internal fixing body and the external fixing body and the shock-absorbing device.

[0008] The beneficial effect of the above technical solution is that: the present invention is an improved invention, and the improvement is that the shock-absorbing mounting device also includes a sealing cover connected to both the internal fixing body and the external fixing body and can be deformed with the movement of the internal fixing body or the external fixing body. The sealing cover can be deformed to avoid hindering the relative movement between the internal fixing body and the external fixing body, thereby ensuring that the buffering effect of the shock-absorbing device can be normally exerted, thereby ensuring the seismic performance of the wall sleeve. The sealing cover includes an outer connecting portion fixedly connected to the outer fixing body around the mounting hole, an inner connecting portion fixedly connected to the inner fixing body around the wall sleeve through-hole on the inner fixing body, and a closing body continuously extending from the inner connecting portion to the outer connecting portion to close the gap between the inner fixing body and the outer fixing body and the shock-absorbing device. This ensures that the sealing cover can be fixedly connected to the inner fixing body and the outer fixing body respectively, and at the same time ensures that the gap between the inner fixing body and the outer fixing body and the shock-absorbing device can be completely covered to achieve a sealing effect, thereby preventing external air and pollutants from entering the inner side of the wall through the gap between the inner fixing body and the outer fixing body and affecting the safe operation of the power equipment. The inner connecting portion is fixedly connected to the inner fixing body around the wall sleeve through-hole on the inner fixing body, so that the inner connecting portion naturally forms an avoidance hole for the wall sleeve to pass through, thereby ensuring the normal installation of the wall sleeve.

[0009] Furthermore, the end face of the inner fixing body used for fixed connection with the inner connecting part protrudes from the end face of the outer fixing body used for fixed connection with the outer connecting part, and the sealing cover includes a sealing tube and an annular plate connected to both ends of the sealing tube, wherein the annular plate at one end forms the inner connecting part, and the annular plate at the other end forms the outer connecting part, and the sealing tube forms a closed body.

[0010] Furthermore, the sealing tube is a bellows.

[0011] Furthermore, the annular plates at both ends are fixedly connected to the end faces of the inner fixing body and the outer fixing body respectively through screws.

[0012] Furthermore, the external fixing body has a fixed end face for adhering to and fixing with the inner wall of the wall, and the external connecting portion is connected to an end face of the external fixing body facing away from the fixed end face.

[0013] Furthermore, the external fixing body has a cylindrical outer circumference and a square inner hole, the square inner hole constitutes a mounting hole, the internal fixing body has a square outer circumference and a cylindrical inner hole, the cylindrical inner hole constitutes a wall sleeve through-hole, and the shock absorbing device is respectively connected between the surrounding hole walls of the square inner hole and the square outer circumference.

[0014] Furthermore, the shock absorbing device includes a guide column, an end cover and a spring, one end of the guide column is provided with a connecting flange, the other end extends into the interior of the end cover and is provided with a limiting flange, one of the connecting flange and the end cover is connected to the external fixing body, and the other is connected to the internal fixing body, and the end cover has a movable space for the limiting flange to move, and the end cover is connected to a limiting plate for limiting the limiting flange in the end cover, the limiting plate is provided with a guide column through hole and there is a movable gap between the guide column through hole and the guide column, the spring is sleeved on the outside of the guide column and the two ends respectively press against the connecting flange and the limiting plate.

[0015] To achieve the above objectives, the wall bushing assembly of the present invention adopts the following technical solutions: A wall sleeve assembly includes a shock-absorbing mounting device and a wall sleeve fixed on the shock-absorbing mounting device. The shock-absorbing mounting device includes an external fixing body for fixing on the wall and having a mounting hole, an internal fixing body located in the mounting hole for the wall sleeve to pass through and fix the wall sleeve, and a shock-absorbing device connected between the internal fixing body and the external fixing body. It also includes a sealing cover connected to both the internal fixing body and the external fixing body and capable of deforming with the movement of the internal fixing body or the external fixing body. The sealing cover includes an external connecting portion fixedly connected to the external fixing body around the mounting hole, an internal connecting portion fixedly connected to the internal fixing body around the wall sleeve through-hole on the internal fixing body, and a closing body continuously extending from the internal connecting portion to the external connecting portion to close the gap between the internal fixing body and the external fixing body and the shock-absorbing device.

[0016] The beneficial effect of the above technical solution is that: the present invention is an improved invention, and the improvement is that the shock-absorbing mounting device also includes a sealing cover connected to both the internal fixing body and the external fixing body and can be deformed with the movement of the internal fixing body or the external fixing body. The sealing cover can be deformed to avoid hindering the relative movement between the internal fixing body and the external fixing body, thereby ensuring that the buffering effect of the shock-absorbing device can be normally exerted, thereby ensuring the seismic performance of the wall sleeve. The sealing cover includes an outer connecting portion fixedly connected to the outer fixing body around the mounting hole, an inner connecting portion fixedly connected to the inner fixing body around the wall sleeve through-hole on the inner fixing body, and a closing body continuously extending from the inner connecting portion to the outer connecting portion to close the gap between the inner fixing body and the outer fixing body and the shock-absorbing device. This ensures that the sealing cover can be fixedly connected to the inner fixing body and the outer fixing body respectively, and at the same time ensures that the gap between the inner fixing body and the outer fixing body and the shock-absorbing device can be completely covered to achieve a sealing effect, thereby preventing external air and pollutants from entering the inner side of the wall through the gap between the inner fixing body and the outer fixing body and affecting the safe operation of the power equipment. The inner connecting portion is fixedly connected to the inner fixing body around the wall sleeve through-hole on the inner fixing body, so that the inner connecting portion naturally forms an avoidance hole for the wall sleeve to pass through, thereby ensuring the normal installation of the wall sleeve.

[0017] Furthermore, the end face of the inner fixing body used for fixed connection with the inner connecting part protrudes from the end face of the outer fixing body used for fixed connection with the outer connecting part, and the sealing cover includes a sealing tube and an annular plate connected to both ends of the sealing tube, wherein the annular plate at one end forms the inner connecting part, and the annular plate at the other end forms the outer connecting part, and the sealing tube forms a closed body.

[0018] Furthermore, the sealing tube is a bellows.

[0019] Furthermore, the annular plates at both ends are fixedly connected to the end faces of the inner fixing body and the outer fixing body respectively through screws.

[0020] Furthermore, the external fixing body has a fixed end face for adhering to and fixing with the inner wall of the wall, and the external connecting portion is connected to an end face of the external fixing body facing away from the fixed end face.

[0021] Furthermore, the external fixing body has a cylindrical outer circumference and a square inner hole, the square inner hole constitutes a mounting hole, the internal fixing body has a square outer circumference and a cylindrical inner hole, the cylindrical inner hole constitutes a wall sleeve through-hole, and the shock absorbing device is respectively connected between the surrounding hole walls of the square inner hole and the square outer circumference.

[0022] Furthermore, the shock absorbing device includes a guide column, an end cover and a spring, one end of the guide column is provided with a connecting flange, the other end extends into the interior of the end cover and is provided with a limiting flange, one of the connecting flange and the end cover is connected to the external fixing body, and the other is connected to the internal fixing body, and the end cover has a movable space for the limiting flange to move, and the end cover is connected to a limiting plate for limiting the limiting flange in the end cover, the limiting plate is provided with a guide column through hole and there is a movable gap between the guide column through hole and the guide column, the spring is sleeved on the outside of the guide column and the two ends respectively press against the connecting flange and the limiting plate.

[0023] Furthermore, the wall sleeve is fixed to the wall sleeve on the internal fixing body by perforation welding.

[0024] To achieve the above objectives, the wall bushing installation structure of the present invention adopts the following technical solutions: A wall sleeve installation structure includes a wall body, a mounting hole is provided on the wall body, an internal fixing body is provided in the mounting hole for the wall sleeve to pass through and fix the wall sleeve, a shock-absorbing device is connected between the internal fixing body and the wall, and a sealing cover that can deform with the movement of the internal fixing body or the wall is also connected to the internal fixing body and the wall, and the sealing cover includes an external connecting part fixedly connected to the wall around the mounting hole, an internal connecting part fixedly connected to the internal fixing body around the wall sleeve through-hole on the internal fixing body, and a closing body that continuously extends from the internal connecting part to the external connecting part to close the gap between the internal fixing body and the wall and the shock-absorbing device.

[0025] The beneficial effect of the above technical solution is that: the present invention is an improved invention, and the improvement is that the internal fixing body and the wall are also connected to a sealing cover that can deform with the movement of the internal fixing body or the wall. The sealing cover can deform to avoid hindering the relative movement between the internal fixing body and the wall, ensuring that the buffering effect of the shock-absorbing device can be normally exerted, thereby ensuring the seismic performance of the wall sleeve. The sealing cover includes an outer connecting portion fixedly connected to the wall around the mounting hole, an inner connecting portion fixedly connected to the inner fixing body around the wall sleeve perforation on the inner fixing body, and a closing body continuously extending from the inner connecting portion to the outer connecting portion to close the gap between the inner fixing body and the wall and the shock-absorbing device. This ensures that the sealing cover can be fixedly connected to the inner fixing body and the wall respectively, and at the same time ensures that the gap between the inner fixing body and the wall and the shock-absorbing device can be completely covered to achieve a sealing effect, thereby preventing outside air and pollutants from entering the inner side of the wall through the gap between the inner fixing body and the wall and affecting the safe operation of the power equipment. The inner connecting portion is fixedly connected to the inner fixing body around the wall sleeve perforation on the inner fixing body, so that the inner connecting portion naturally forms an avoidance hole for the wall sleeve to pass through, thereby ensuring the normal installation of the wall sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of the wall bushing assembly of the present invention from one perspective; Figure 2 A three-dimensional diagram of the wall bushing assembly of the present invention from another perspective; Figure 3 This is a front view of the wall bushing assembly of the present invention; Figure 4 A perspective view of a shock-absorbing mounting device in a wall bushing assembly of the present invention; Figure 5 This is a three-dimensional view of the shock-absorbing mounting device in the wall bushing assembly of the present invention without showing the sealing cover; Figure 6 A three-dimensional diagram of a sealing cover of a shock-absorbing mounting device in a wall bushing assembly of the present invention; Figure 7 A three-dimensional diagram of a shock-absorbing component of a shock-absorbing mounting device in a wall bushing assembly of the present invention; Figure 8 The present invention is a cross-sectional view of a shock-absorbing component of a shock-absorbing installation device in a wall bushing assembly.

[0027] In the figure: 1. External fixing body; 11. Cylindrical outer circumference; 12. Square inner hole; 13. Fixed end face; 14. External connection end face; 15. Fixed through-hole; 16. First threaded blind hole; 2. Internal fixing body; 21. First through-hole; 22. Second through-hole; 23. Groove; 24. Internal connection end face; 25. Second threaded blind hole; 3. Shock absorber; 31. Guide column; 311. Connecting flange; 312. Limiting flange; 32. End cover; 33. Limiting plate; 34. Spring; 4. Sealing cover; 41. First annular plate; 42. Second annular plate; 43. Bellows; 44. First screw through-hole; 45. Second screw through-hole; 5. Wall bushing; 51. Cylinder; 52. Outdoor composite insulator; 53. Outdoor terminal block; 54. Indoor composite insulator; 55. Indoor terminal block. DETAILED DESCRIPTION

[0028] In response to the technical problems existing in the prior art, the basic concept of the present invention is to add a sealing cover, so that the sealing cover is connected between the internal fixing body and the external fixing body or between the internal fixing body and the wall, to block the gap between the internal fixing body and the external fixing body or the gap between the internal fixing body and the wall, and the sealing cover is deformable to avoid hindering the relative movement between the internal fixing body and the external fixing body or the relative movement between the internal fixing body and the wall, thereby ensuring that the buffering effect of the shock absorbing device can be normally exerted.

[0029] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0030] Embodiment 1 of the wall bushing assembly of the present invention: like Figure 1 、 Figure 2 and Figure 3 As shown, the wall bushing assembly includes a shock-absorbing mounting device and a wall bushing 5 fixed on the shock-absorbing mounting device. The shock-absorbing mounting device is installed on a wall. As a preferred embodiment of the present invention, the wall is a valve hall wall of a converter station. In other embodiments, it can also be a wall of a closed building such as a test station or a substation.

[0031] The specific structure of the wall bushing 5 is conventional, primarily comprising a central barrel 51 and two flanking composite insulators: an outdoor-side composite insulator 52 and an indoor-side composite insulator 54. In this embodiment, the outdoor-side composite insulator 52 extends beyond the valve hall wall for connection to the external DC field. An outdoor terminal block 53 is located at the end of the outdoor-side composite insulator 52 to facilitate wiring. The indoor-side composite insulator 54, located within the valve hall, connects to electrical equipment within the hall. An indoor terminal block 55 is located at the end of the indoor-side composite insulator 54 to facilitate wiring.

[0032] Combine Figures 1 to 4As shown, the shock-absorbing mounting device includes an external fixing body 1, an internal fixing body 2, a shock-absorbing device 3, and a sealing cover 4. The external fixing body 1 is used to be fixed to the valve hall wall (the valve hall wall has a wall perforation for the wall sleeve 5 to pass through, and the external fixing body 1 is fixed to the wall perforation and can cover the wall perforation). The external fixing body 1 is a plate-like structure with a circular outer surface and a square inner surface, having a cylindrical outer circumference 11 and a square inner hole 12. The square inner hole 12 forms a mounting hole for the internal fixing body 2 and the shock-absorbing device 3. The external fixing body 1 also has a fixing end surface 13 for contacting and fixing to the inner wall of the valve hall wall. The specific fixing method can be screw or bolt connection. For example, a hole is first drilled in the wall and an expansion tube is inserted. The screw is then passed through the external fixing body 1 and screwed into the expansion tube to secure the external fixing body 1 to the wall. Alternatively, bolts can be pre-embedded in the wall or expansion bolts can be post-anchored. The bolts are passed through the external fixing body 1 and nuts are installed to secure the external fixing body 1 to the wall. To this end, the external fixing body 1 is provided with axially extending fixing holes 15 for screws or bolts to pass through, and a plurality of fixing holes 15 are evenly distributed along the circumference of the external fixing body 1. Of course, in other embodiments, if the wall comprises a steel plate that is resistant to explosions and fire, the external fixing body 1 can also be directly welded to the inner wall of the wall.

[0033] The inner fixing body 2 is located in the square inner hole 12 of the outer fixing body 1. The inner fixing body 2 is a shell structure with a square outer surface and a cylindrical inner hole. The cylindrical inner hole constitutes a wall sleeve through-hole for the wall sleeve 5 to pass through. Figure 2 、 Figure 4 and Figure 5 As shown, the wall bushing perforations include a first perforation 21 and a second perforation 22. The diameter of the second perforation 22 is larger than that of the first perforation 21. The diameter of the first perforation 21 matches the outer diameter of the barrel 51 of the wall bushing 5. The indoor composite insulator 54 of the wall bushing 5 passes through the first perforation 21 and the second perforation 22 in sequence. The barrel 51 also passes through the first perforation 21 and is directly welded to the first perforation 21. This not only ensures that the wall bushing 5 is fixed to the internal fixed body 2, but also ensures the sealing of the installation area. In other embodiments, for the barrel 51 with a flange, the barrel 51 can be fixed to the internal fixed body 2 via the flange and bolts, and the portion passing through the first perforation 21 does not require welding. Of course, in other embodiments, the wall bushing perforations can also be perforations of equal diameter. In this case, the barrel 51 can be welded to the perforations or fixed to the internal fixed body 2 via a flange and bolts.

[0034] like Figure 4 As shown, a concave recessed groove 23 is provided on the side of the internal fixing body 2 facing the same direction as the fixed end face 13, i.e., the side of the internal fixing body 2 facing outside the valve hall. The provision of the recessed groove 23 and the second through hole 22 can prevent the internal fixing body 2 from being too thick or too heavy.

[0035] like Figure 1 、 Figure 4 and Figure 5 As shown, the shock absorber 3 is connected between the inner and outer fixing bodies 2 and 1, and the shock absorbers 3 are respectively connected between the four walls of the square inner hole 12 and the square outer surface of the inner fixing body 2. In this embodiment, there are three shock absorbers 3 on each side to ensure a cushioning effect. In other embodiments, depending on the weight of the wall bushing 5 and the specific dimensions of the inner and outer fixing bodies 2 and 1, the number of shock absorbers on each side may be one, two, or more than four.

[0036] like Figure 7 and Figure 8 As shown, the shock absorber 3 includes a guide post 31, an end cap 32, and a spring 34. One end of the guide post 31 is provided with a connecting flange 311, and the other end extends into the interior of the end cap 32 and is provided with a retaining flange 312. In this embodiment, the connecting flange 311 is fixedly connected to the wall of the square inner hole 12 of the external fixing body 1 by screws, and therefore, screw holes are provided on the connecting flange 311. In other embodiments, the connecting flange 311 can also be welded to the wall of the square inner hole 12. The end cap 32 includes a sleeve and an end plate connected to one end of the sleeve. In this embodiment, the end plate is fixedly connected to the square outer surface of the internal fixing body 2 by screws, and therefore, screw mounting holes are provided on the end plate. In other embodiments, the end plate can also be welded to the square outer surface of the internal fixing body 2. In other embodiments, the end cap 32 can be fixedly connected to the wall of the square inner hole 12, in which case the connecting flange 311 is fixedly connected to the square outer surface of the internal fixing body 2. The specific fixing method can be screw connection or welding.

[0037] The end cap 32 has a movable space within it for the limiting flange 312 to move, including an axial movable space for axial movement and a radial movable space for radial movement. A limiting plate 33 is connected to the end of the end cap 32, remote from the end plate, for retaining the limiting flange 312 within the end cap 32. The limiting plate 33 is provided with a guide post perforation, and a movable gap is provided between the guide post perforation and the guide post 31. This allows the guide posts 31 and end cap 32 of the upper and lower shock absorbers 3 to move relative to each other when the external fixing body 1 moves up and down relative to the internal fixing body 2 due to the axial movable space. Simultaneously, due to the radial movable space and the movable gap, the guide posts 31 and end cap 32 of the left and right shock absorbers 3 can also move relative to each other without obstruction.

[0038] The spring 34 is sleeved on the outside of the guide column 31 and its two ends are respectively pressed against the connecting flange 311 and the limit plate 33. When an earthquake occurs, the shaking of the valve hall wall is transmitted to the external fixed body 1, causing the external fixed body 1 to shake up and down or left and right. At this time, the spring 34 located on the surrounding shock absorbing devices 3 can absorb the shaking of the external fixed body 1 by deformation, buffering the force generated by the earthquake, ensuring the seismic performance of the wall sleeve 5, and reducing damage to the wall sleeve 5, especially the cylinder 51.

[0039] In this embodiment, the connecting flange 311 and the limiting flange 312 are integrally connected to the guide post 31. The sleeve and end plate of the end cap 32 are also integrally connected. To facilitate assembly, the limiting plate 33 is configured as a two-piece structure. The guide post perforations on each limiting plate 33 are semicircular holes. The two limiting plates 33 can be directly buckled onto the outside of the guide post 31 in the radial direction. Each limiting plate 33 is fixedly connected to the sleeve end surface of the end cap 32 by screws to facilitate assembly and disassembly. In other embodiments, each limiting plate 33 can be directly welded to the end cap 32. In other embodiments, the limit plate 33 can be an integral annular plate, and the limit plate 33 is integrally connected to the sleeve of the end cover 32. The end plate of the end cover 32 is split and fixedly connected. At the same time, a fixed plate is separately fixed to the end of the guide column 31 away from the connecting flange 311. The fixed plate is fixed to the end face of the guide column 31 after the end of the guide column 31 is extended into the end cover 32, and then the end plate of the end cover 32 is fixed to the sleeve. At this time, the outer diameter of the fixed plate is larger than the outer diameter of the guide column 31, and the edge of the fixed plate extending out of the guide column 31 constitutes a limiting flange.

[0040] In the present invention, Figures 1 to 4 As shown, the sealing cover 4 is connected to both the internal fixing body 2 and the external fixing body 1, and the sealing cover 4 can be deformed as the internal fixing body 2 or the external fixing body 1 moves, so as to avoid hindering the relative movement between the internal fixing body 2 and the external fixing body 1, thereby ensuring that the buffering effect of the shock absorbing device 3 can be normally exerted, thereby ensuring the seismic performance of the wall sleeve 5.

[0041] Specifically, the sealing cover 4 includes an outer connecting portion fixedly connected to the outer fixing body 1 around the square inner hole 12, an inner connecting portion fixedly connected to the inner fixing body 2 around the wall sleeve through-hole (i.e., the second through-hole 22) on the inner fixing body 2, and a closing body continuously extending from the inner connecting portion to the outer connecting portion to close the gap between the inner fixing body and the outer fixing body and the shock-absorbing device 3. In this way, it is ensured that the sealing cover 4 can be fixedly connected to the inner fixing body 2 and the outer fixing body 1 respectively, and at the same time, it is ensured that the gap between the inner fixing body 2 and the outer fixing body 1 and the shock-absorbing device 3 can be completely covered to achieve a sealing effect, thereby preventing external air and pollutants from entering the inner side of the wall through the gap between the inner fixing body 2 and the outer fixing body 1 and affecting the safe operation of the power equipment. In addition, the inner connecting portion is fixedly connected to the inner fixing body 2 around the second through-hole 22 on the inner fixing body 2, so that the inner connecting portion naturally forms an avoidance hole for the wall sleeve 5 to pass through, thereby ensuring the normal installation of the wall sleeve 5.

[0042] Specifically in this embodiment, Figure 5 As shown, the external fixing body 1 has an external connection end surface 14 fixedly connected to the external connection portion of the sealing cover 4. The external connection end surface 14 is arranged opposite the fixing end surface 13, that is, the external connection end surface 14 faces the inside of the valve hall. The internal fixing body 2 has an internal connection end surface 24 fixedly connected to the internal connection portion of the sealing cover 4. The internal connection end surface 24 also faces the inside of the valve hall and protrudes from the external connection end surface 14.

[0043] Combine Figure 2 and Figure 6 As shown, the sealing cover 4 includes a sealing tube 43 and annular plates connected to the ends of the sealing tube 43. The annular plates at the two ends are respectively a first annular plate 41 and a second annular plate 42. The first annular plate 41 forms the aforementioned external connection portion, the second annular plate 42 forms the aforementioned internal connection portion, and the sealing tube 43 forms the aforementioned closed body. The sealing tube 43 in this embodiment is a bellows, preferably made of metal for a long service life. Of course, plastic materials can also be used in other embodiments. The bellows has a certain degree of elasticity, flexibility, and telescopic foldability. When the external fixator 1 and the internal fixator 2 move relative to each other, it can freely deform to accommodate the relative movement between the external fixator 1 and the internal fixator 2.

[0044] The first annular plate 41 and the second annular plate 42 are both rigid plates to ensure a secure connection. The diameter of the center hole of the first annular plate 41 is much larger than that of the center hole of the second annular plate 42, and the diameter of the center hole of the second annular plate 42 is larger than the outer diameter of the wall bushing 5 to avoid the wall bushing 5.

[0045] In this embodiment, the first annular plate 41 is fixedly connected to the outer connecting end surface 14 via first screws. Therefore, the first annular plate 41 is provided with a plurality of first screw through-holes 44, which are evenly distributed along the circumference. Furthermore, the outer connecting end surface 14 is provided with a plurality of first threaded blind holes 16, which are evenly distributed around the circumference, for connection with the first screws. The circumference of the plurality of first threaded blind holes 16 is located inward of the circumference of the plurality of fixing through-holes 15. The second annular plate 42 is fixedly connected to the inner connecting end surface 24 via second screws. Therefore, the second annular plate 42 is provided with a plurality of second screw through-holes 45, which are evenly distributed along the circumference. Furthermore, the inner connecting end surface 24 is provided with a plurality of second threaded blind holes 25, which are evenly distributed around the circumference, for connection with the second screws. The plurality of second threaded blind holes 25 are arranged around the second through-hole 22.

[0046] In other embodiments, the first annular plate 41 may be directly welded and fixed to the outer connection end surface 14 , while the second annular plate 42 may be directly welded and fixed to the inner connection end surface 24 .

[0047] In summary, in the wall bushing assembly of the present invention, the inner fixing body 2 and the outer fixing body 1 are connected at the top, bottom, left, and right sides by three shock-absorbing devices 3, ensuring the reliable fixation of the inner fixing body 2 and the outer fixing body 1. The wall bushing 5 is directly welded to the inner fixing body 2 of the shock-absorbing mounting device, providing stable and reliable support for the wall bushing 5, ensuring the seismic performance of the wall bushing 5, effectively reducing earthquake damage to the wall bushing 5, and increasing the service life of the wall bushing 5. At the same time, the inner fixing body 2 and the outer fixing body 1 are flexibly connected by a sealing cover 4, which not only ensures the seismic performance of the shock-absorbing mounting device, but also provides the shock-absorbing mounting device with sealing performance, effectively preventing outside air and pollutants from entering the valve hall, ensuring the safe operation of the power system equipment within the converter station, and reducing equipment maintenance costs.

[0048] In other embodiments of the wall bushing assembly, the specific structure of the shock absorbing device may also adopt an existing structure in the prior art, such as the movable part in CN118816008A, or the shock absorbing device in CN119665053A.

[0049] In other embodiments of the wall bushing assembly: the external fixing body may also have a square outer peripheral surface. In this case, the external fixing body is a plate-like structure with a square outside and a square inside. In general, the external fixing body needs to be a plate-like structure. Except for the square hole in the center for installing the internal fixing body and the shock-absorbing device, the rest of the body should be solid and the whole body should be able to cover the wall penetration.

[0050] In other embodiments of the wall sleeve assembly: the mounting hole of the external fixing body for mounting the internal fixing body and the shock absorbing device may also be a cylindrical hole. In this case, the outer peripheral surface of the internal fixing body is a cylindrical surface, the shock absorbing device is connected between the hole wall and the cylindrical surface of the cylindrical hole, and three or more shock absorbing devices are arranged at intervals along the circumferential direction.

[0051] In other embodiments of the wall sleeve assembly, the internal fixing body may not be a shell structure, but a solid block structure. For example, except for the central wall sleeve perforation, the rest of the body is a solid structure with a certain thickness.

[0052] In other embodiments of the wall sleeve assembly: the external connection portion of the sealing cover can also be connected to the fixed end face of the fixed body for fitting and fixing with the inner wall of the wall. Since the fixed end face is already fitted with the inner wall of the wall, the sealing cover needs to extend into the wall perforation.

[0053] In other embodiments of the wall sleeve assembly: the sealing tube may not be a bellows, but other elastic sealing tubes, such as an airbag. Of course, the sealing tube can also be a non-elastic but flexible and deformable tube. In this case, the sealing tube needs to have sufficient length and reserve a deformation margin, that is, after the inner connecting part and the outer connecting part are fixed, there is still length redundancy so that it can adaptively deform when the external fixing body and the internal fixing body move relative to each other.

[0054] In other embodiments of the wall sleeve assembly: the sealing cover can also be composed only of a sealing tube, and the specific form of the sealing tube is the same as the above embodiment. At this time, the two ends of the sealing tube are directly welded or adhesively fixed to the internal fixing body and the external fixing body, and the two end portions of the sealing tube directly constitute the internal connecting portion and the external connecting portion.

[0055] In other embodiments of the wall sleeve assembly: the end face of the internal fixing body for fixed connection with the internal connection part and the end face of the external fixing body for fixed connection with the external connection part can be flush. At this time, the sealing cover is a cover that can be flattened. For example, the cover is in a circular ring shape, the outer edge constitutes the outer connection part, the inner edge constitutes the inner connection part, and the center hole naturally constitutes an avoidance through-hole for the wall sleeve to pass through. The specific connection method of the external connection part and the internal connection part can be screw connection, welding or bonding, and the cover body can be an elastic cover body made of rubber material, the cover body can undergo elastic deformation, or it can be a cover body without elasticity but flexible, such as plastic cloth. At this time, the cover body needs to have sufficient area and reserve deformation margin, that is, after the internal connection part and the external connection part are fixed, there is structural redundancy in the middle, so that when the external fixing body and the internal fixing body move relative to each other, they can deform adaptively.

[0056] The embodiment of the wall sleeve shock-absorbing installation device in the present invention is as follows: the specific structure of the wall sleeve shock-absorbing installation device is the same as the shock-absorbing installation device in any embodiment of the above-mentioned wall sleeve assembly, and will not be repeated here.

[0057] The implementation method of the wall bushing installation structure in the present invention is as follows: The wall sleeve installation structure includes a wall, a mounting hole is provided on the wall, an internal fixing body is provided in the mounting hole for the wall sleeve to pass through and fix the wall sleeve, and a shock-absorbing device is connected between the internal fixing body and the wall. In this embodiment, there is no external fixing body, and the internal fixing body and the shock-absorbing device are directly installed in the mounting hole on the wall. The specific structure of the internal fixing body and the shock-absorbing device is the same as the internal fixing body and the shock-absorbing device in any embodiment of the above-mentioned wall sleeve assembly.

[0058] The internal fixture and the wall are also connected to a sealing cover that deforms with the movement of the internal fixture or wall. The specific form of the sealing cover is the same as that of any of the aforementioned wall bushing assembly embodiments. This deformable sealing cover prevents obstruction of relative movement between the internal fixture and the wall, ensuring the proper functioning of the shock-absorbing device and, consequently, the seismic performance of the wall bushing.

[0059] The sealing cover includes an outer connecting portion fixedly connected to the wall around the mounting hole, an inner connecting portion fixedly connected to the inner fixing body around the wall sleeve perforation on the inner fixing body, and a closing body continuously extending from the inner connecting portion to the outer connecting portion to close the gap between the inner fixing body and the wall and the shock-absorbing device. This ensures that the sealing cover can be fixedly connected to the inner fixing body and the wall respectively, and at the same time ensures that the gap between the inner fixing body and the wall and the shock-absorbing device can be completely covered to achieve a sealing effect, thereby preventing outside air and pollutants from entering the inner side of the wall through the gap between the inner fixing body and the wall and affecting the safe operation of the power equipment. The inner connecting portion is fixedly connected to the inner fixing body around the wall sleeve perforation on the inner fixing body, so that the inner connecting portion naturally forms an avoidance hole for the wall sleeve to pass through, thereby ensuring the normal installation of the wall sleeve.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A shock-absorbing installation device for a wall bushing, comprising an external fixing body having a mounting hole for fixing to a wall, an internal fixing body located in the mounting hole for allowing the wall bushing to pass through and fix the wall bushing, and a shock-absorbing device connected between the internal fixing body and the external fixing body, characterized in that: The invention also includes a sealing cover connected to both the internal fixing body and the external fixing body and capable of deforming as the internal fixing body or the external fixing body moves. The sealing cover includes an outer connecting portion fixedly connected to the external fixing body around the mounting hole, an inner connecting portion fixedly connected to the internal fixing body around the wall sleeve perforation on the internal fixing body, and a closing body extending continuously from the inner connecting portion to the outer connecting portion to close the gap between the internal fixing body and the external fixing body and the shock absorbing device.

2. The wall bushing shock-absorbing installation device according to claim 1, characterized in that: The end face of the inner fixing body used for fixed connection with the inner connecting part protrudes from the end face of the outer fixing body used for fixed connection with the outer connecting part. The sealing cover includes a sealing tube and an annular plate connected to both ends of the sealing tube, wherein the annular plate at one end forms the inner connecting part, and the annular plate at the other end forms the outer connecting part, and the sealing tube forms a closed body.

3. The wall bushing shock-absorbing installation device according to claim 2, characterized in that: The sealing tube is a bellows.

4. The wall bushing shock-absorbing installation device according to claim 2, characterized in that: The annular plates at both ends are fixedly connected to the end faces of the internal fixing body and the external fixing body respectively through screws.

5. The wall bushing vibration damping installation device according to any one of claims 1 to 4, characterized in that: The external fixing body has a fixed end surface for adhering to and fixing with the inner wall of the wall, and the external connecting portion is connected to an end surface of the external fixing body which is opposite to the fixed end surface.

6. The wall bushing vibration-damping installation device according to any one of claims 1 to 4, characterized in that: The external fixing body has a cylindrical outer circumference and a square inner hole, the square inner hole constitutes a mounting hole, the internal fixing body has a square outer circumference and a cylindrical inner hole, the cylindrical inner hole constitutes a wall sleeve through-hole, and the shock absorbing components are respectively connected between the surrounding hole walls of the square inner hole and the square outer circumference.

7. The wall bushing vibration damping installation device according to any one of claims 1 to 4, characterized in that: The shock absorbing device includes a guide column, an end cover and a spring. One end of the guide column is provided with a connecting flange, and the other end extends into the interior of the end cover and is provided with a limiting flange. One of the connecting flange and the end cover is connected to the external fixing body, and the other is connected to the internal fixing body. There is a movable space for the limiting flange to move in the end cover. A limiting plate for limiting the limiting flange in the end cover is connected to the end cover. A guide column through hole is provided on the limiting plate, and a movable gap is provided between the guide column through hole and the guide column. The spring is sleeved on the outside of the guide column and its two ends respectively abut against the connecting flange and the limiting plate.

8. A wall bushing assembly, comprising a shock-absorbing mounting device and a wall bushing fixed on the shock-absorbing mounting device, characterized in that: The shock-absorbing installation device is the wall sleeve shock-absorbing installation device according to any one of claims 1 to 7.

9. The wall bushing assembly according to claim 8, characterized in that: The wall sleeve is fixed to the wall sleeve on the internal fixing body by perforation welding.

10. A wall bushing installation structure, comprising a wall, a mounting hole provided on the wall, an internal fixing body provided in the mounting hole for the wall bushing to pass through and fix the wall bushing, a shock absorbing device connected between the internal fixing body and the wall, characterized in that: The inner fixing body and the wall are also connected to a sealing cover that can deform with the movement of the inner fixing body or the wall. The sealing cover includes an outer connecting portion fixedly connected to the wall around the mounting hole, an inner connecting portion fixedly connected to the inner fixing body around the wall sleeve perforation on the inner fixing body, and a closing body that continuously extends from the inner connecting portion to the outer connecting portion to close the gap between the inner fixing body and the wall and the shock-absorbing device.

Images