Rainproof sealing structure of mechanism output shaft and GIS

Abstract

The application relates to a rainproof sealing structure of a mechanism output shaft and GIS, which comprises a mechanism shell and a mechanism output shaft upwardly penetrating the mechanism shell, the end of the mechanism output shaft penetrating the mechanism shell is connected with a shaft coupling structure, a shaft sleeve is sealingly assembled between the mechanism output shaft and the mechanism shell, the shaft sleeve has a penetrating section for upwardly penetrating the mechanism shell, a water baffle is sleeved on the shaft coupling structure or the mechanism output shaft and is sealingly connected, the inner diameter of the water baffle is larger than the outer diameter of the penetrating section, and the lower edge of the water baffle is lower than the upper end surface of the shaft sleeve. The application effectively solves the problem that the dynamic seal is damaged due to rainwater entering the dynamic seal between the output shaft and the shaft sleeve in the prior art.

Description

Technical Field

[0001] This invention relates to a rainproof sealing structure for the output shaft of a mechanism and to GIS, belonging to the field of GIS equipment technology. Background Technology

[0002] In the prior art, the grounding switch is usually located below the disconnecting switch, and in order to achieve the linkage between the grounding switch and the disconnecting switch, the output shaft of the grounding switch operating mechanism is usually connected to the drive shaft of the disconnecting switch body.

[0003] The 550kV new generation GIS grounding switch is available in two modes: single-pole operation and three-phase linkage. For example... Figure 1 As shown, for a grounding switch operating in single-pole mode, the drive shaft 100 and the output shaft 200 are connected by a cross-slider coupling structure 300. Specifically, the cross-slider coupling structure 300 includes an upper module 301 connected to the drive shaft 100, a lower module 302 integrally connected to the output shaft 200, and an intermediate module 303 located between the two. The outer diameters of the upper module 301, lower module 302, and intermediate module 303 are all the same. A bushing 500 is sealed between the output shaft 200 and the mechanism housing 400 of the grounding switch operating mechanism. The bushing 500 and the mechanism housing 400 have a static seal fit, and the bushing 500 and the output shaft 200 have a dynamic seal fit. The bushing 500 has an extension section that extends upward through the upper end face of the mechanism housing 400, and the height h of the extension section is 3mm. Figure 3 (as shown); In addition, a first sleeve 600 is welded between the main body housing 900 of the disconnecting switch body and the mechanism housing 400, covering the output shaft 200, the transmission shaft 100 and the cross slider coupling structure 300, and the inside of the first sleeve 600 is closed.

[0004] like Figure 2 As shown, for the grounding switch in the three-phase linkage mode, the difference between the grounding switch in this mode and the grounding switch in the single-pole operation mode is that a transmission device of the three-phase linkage mechanism 700 is added at the connection position between the output shaft 200 and the transmission shaft 100. Specifically, the transmission shaft 100 is connected to the connecting rod 701 of the three-phase linkage mechanism 700, and a second sleeve 800 is welded between the main body housing 900 and the mechanism housing 400, covering the output shaft 200, the transmission shaft 100 and the cross slider coupling structure 300. The second sleeve 800 is provided with a clearance opening for the clearance connecting rod.

[0005] However, in the above-mentioned three-phase linkage mode grounding switch, the setting of the clearance port on the second sleeve exposes the connection position between the output shaft and the drive shaft, as well as the sealing fit position between the output shaft and the bushing, to the atmospheric environment. In rainy weather, rainwater can easily fall on the upper surface of the bushing and enter the dynamic seal between the output shaft and the bushing under the influence of the vibration generated by the operation of the output shaft. Rust will occur at the dynamic seal, and the foreign matter generated by the rust will wear down the sealing surface of the output shaft and the bushing, forming pits on the sealing surface and damaging the dynamic seal. Summary of the Invention

[0006] The purpose of this invention is to provide a rainproof sealing structure for the output shaft of a mechanism, so as to solve the problem in the prior art that the dynamic seal is damaged due to rainwater entering the dynamic seal between the output shaft and the bushing; the purpose of this invention is also to provide a GIS to solve the above problems.

[0007] To achieve the above objectives, the rainproof sealing structure of the output shaft of the mechanism in this invention adopts the following technical solution:

[0008] A rainproof sealing structure for a mechanism output shaft includes a mechanism housing and a mechanism output shaft extending upward through the mechanism housing. A coupling structure is connected to the end of the mechanism output shaft extending through the mechanism housing. A bushing is sealed between the mechanism output shaft and the mechanism housing. The bushing has an extension section for extending upward through the mechanism housing. A water baffle is fitted and sealed on the coupling structure or the mechanism output shaft. The inner diameter of the water baffle is larger than the outer diameter of the extension section, and the lower edge of the water baffle is lower than the upper end face of the bushing.

[0009] The beneficial effects of the above technical solution are as follows: In the rainproof sealing structure of the output shaft of the present invention, since a water baffle is sleeved on the coupling structure or the output shaft, and since the inner diameter of the water baffle is larger than the outer diameter of the through section, and the lower edge of the water baffle is lower than the upper end face of the bushing, the water baffle covers the outside of the upper end face of the bushing. At the same time, since the water baffle is sealed and connected to the coupling structure or the output shaft, the upper part of the bushing can also be sealed and shielded by the water baffle. In this way, even in rainy weather, the falling rainwater cannot fall on the upper end face of the bushing, thereby preventing rainwater from entering the dynamic seal between the bushing and the output shaft, avoiding rust at the dynamic seal, and thus avoiding failure of the dynamic seal.

[0010] Furthermore, the coupling structure is a cross-slider coupling structure, which includes an upper module, a lower module connected to the output shaft of the mechanism, and an intermediate module located between the two. The water baffle is sealed and connected to the intermediate module or the lower module.

[0011] The beneficial effects of the above technical solution are as follows: connecting the water baffle to the coupling, compared with connecting it to the output shaft of the mechanism, can reduce the space occupied by the water baffle in the axial direction, and facilitate the arrangement and fixed installation of the water baffle.

[0012] Furthermore, the water-blocking cylinder is sealed and connected to the intermediate module, and the inner diameter of the water-blocking cylinder is larger than the outer diameter of the lower module.

[0013] The beneficial effects of the above technical solution are as follows: fixing the water-blocking cylinder to the intermediate module not only increases the length of the water-blocking cylinder compared to fixing it to the lower module, but also facilitates the fixed installation of the water-blocking cylinder because the intermediate module is independent of the upper and lower modules; when the output shaft and transmission shaft of the mechanism move, the intermediate module will have a certain relative movement with the lower module. Therefore, setting the inner diameter of the water-blocking cylinder to be larger than the outer diameter of the lower module can avoid interference between the water-blocking cylinder and the lower module to a certain extent and prevent the water-blocking cylinder from deforming due to interference.

[0014] Furthermore, the outer diameter of the intermediate module is larger than that of the lower module, and the inner wall of the water-baffle cylinder is sealed to the outer circumferential surface of the intermediate module.

[0015] The beneficial effects of the above technical solution are that it not only ensures the fixing strength between the water-blocking cylinder and the intermediate module, but also facilitates the fixing between the intermediate module and the water-blocking cylinder.

[0016] Furthermore, the distance between the upper end face of the bushing and the lower end face of the lower module is no more than 5mm.

[0017] The beneficial effects of the above technical solution are: it can reduce the distance between the upper end face of the bushing and the lower end face of the lower module to a certain extent, and the reduction of the distance can prevent water from entering the gap between the bushing and the lower module, and further prevent water from entering the dynamic seal, thus avoiding the failure of the dynamic seal.

[0018] Furthermore, the upper end of the bushing is provided with a conical surface that connects to the upper end face of the bushing, and the lower end of the conical surface is lower than the lower edge of the water baffle.

[0019] The beneficial effect of the above technical solution is that: setting the lower end of the conical surface below the lower edge of the water baffle allows water to flow down through the conical surface when the output shaft or coupling structure vibrates and there is a lot of water on the housing of the mechanism, since water may splash onto the upper end face of the bushing. This reduces the accumulation of water on the upper end of the bushing and thus reduces the risk of dynamic seal failure in this situation.

[0020] Furthermore, the angle between the generatrix of the cone and the horizontal plane is not less than 15 degrees.

[0021] The beneficial effect of the above technical solution is that it can ensure that water can flow smoothly through the conical surface, avoid water stagnation on the conical surface, and thus avoid a large accumulation of water on the bushing.

[0022] Furthermore, the water-blocking cylinder is welded and fixed to the coupling structure or the output shaft of the mechanism.

[0023] The beneficial effects of the above technical solution are that, by fixing it by welding, the connection strength between the water baffle and the output shaft of the coupling structure or mechanism can be guaranteed, and the sealing fit between the water baffle and the output shaft of the coupling structure or mechanism can also be guaranteed.

[0024] Furthermore, a static seal is formed between the bushing and the housing of the mechanism, and the upper end of the static seal mating part is coated with waterproof adhesive.

[0025] The beneficial effect of the above technical solution is that the waterproof adhesive further enhances the waterproof capability of the static seal, thereby further preventing the failure of the static seal.

[0026] To achieve the above objectives, the GIS in this invention adopts the following technical solution:

[0027] A GIS includes a grounding switch, which includes an operating mechanism. The operating mechanism includes a mechanism housing and a mechanism output shaft. The GIS also includes a rainproof sealing structure for the mechanism output shaft. The rainproof sealing structure for the mechanism output shaft includes a mechanism housing and a mechanism output shaft extending upward through the mechanism housing. The mechanism housing is the mechanism housing of the grounding switch operating mechanism, and the mechanism output shaft is the mechanism output shaft of the grounding switch operating mechanism. A coupling structure is connected to the end of the mechanism output shaft extending out of the mechanism housing. A bushing is sealed between the mechanism output shaft and the mechanism housing. The bushing has a through section for extending upward through the mechanism housing. A water baffle is sleeved and sealed on the coupling structure or the mechanism output shaft. The inner diameter of the water baffle is larger than the outer diameter of the through section, and the lower edge of the water baffle is lower than the upper end face of the bushing.

[0028] The beneficial effects of the above technical solution are as follows: In the GIS of the present invention, since a water-blocking cylinder is sleeved on the coupling structure or output shaft, and since the inner diameter of the water-blocking cylinder is larger than the outer diameter of the through section, and the lower edge of the water-blocking cylinder is lower than the upper end face of the bushing, the water-blocking cylinder covers the outside of the upper end face of the bushing. At the same time, since the water-blocking cylinder is sealed and connected to the coupling structure or output shaft, the upper part of the bushing can also be sealed and shielded by the water-blocking cylinder. In this way, even in rainy weather, the falling rainwater cannot fall on the upper end face of the bushing, thereby preventing rainwater from entering the dynamic seal between the bushing and the output shaft, avoiding rust at the dynamic seal, and thus avoiding failure of the dynamic seal, ensuring the reliability of GIS operation.

[0029] Furthermore, the coupling structure is a cross-slider coupling structure, which includes an upper module, a lower module connected to the output shaft of the mechanism, and an intermediate module located between the two. The water baffle is sealed and connected to the intermediate module or the lower module.

[0030] The beneficial effects of the above technical solution are as follows: connecting the water baffle to the coupling, compared with connecting it to the output shaft of the mechanism, can reduce the space occupied by the water baffle in the axial direction, and facilitate the arrangement and fixed installation of the water baffle.

[0031] Furthermore, the water-blocking cylinder is sealed and connected to the intermediate module, and the inner diameter of the water-blocking cylinder is larger than the outer diameter of the lower module.

[0032] The beneficial effects of the above technical solution are as follows: fixing the water-blocking cylinder to the intermediate module not only increases the length of the water-blocking cylinder compared to fixing it to the lower module, but also facilitates the fixed installation of the water-blocking cylinder because the intermediate module is independent of the upper and lower modules; when the output shaft and transmission shaft of the mechanism move, the intermediate module will have a certain relative movement with the lower module. Therefore, setting the inner diameter of the water-blocking cylinder to be larger than the outer diameter of the lower module can avoid interference between the water-blocking cylinder and the lower module to a certain extent and prevent the water-blocking cylinder from deforming due to interference.

[0033] Furthermore, the outer diameter of the intermediate module is larger than that of the lower module, and the inner wall of the water-baffle cylinder is sealed to the outer circumferential surface of the intermediate module.

[0034] The beneficial effects of the above technical solution are that it not only ensures the fixing strength between the water-blocking cylinder and the intermediate module, but also facilitates the fixing between the intermediate module and the water-blocking cylinder.

[0035] Furthermore, the distance between the upper end face of the bushing and the lower end face of the lower module is no more than 5mm.

[0036] The beneficial effects of the above technical solution are: it can reduce the distance between the upper end face of the bushing and the lower end face of the lower module to a certain extent, and the reduction of the distance can prevent water from entering the gap between the bushing and the lower module, and further prevent water from entering the dynamic seal, thus avoiding the failure of the dynamic seal.

[0037] Furthermore, the upper end of the bushing is provided with a conical surface that connects to the upper end face of the bushing, and the lower end of the conical surface is lower than the lower edge of the water baffle.

[0038] The beneficial effect of the above technical solution is that: setting the lower end of the conical surface below the lower edge of the water baffle allows water to flow down through the conical surface when the output shaft or coupling structure vibrates and there is a lot of water on the housing of the mechanism, since water may splash onto the upper end face of the bushing. This reduces the accumulation of water on the upper end of the bushing and thus reduces the risk of dynamic seal failure in this situation.

[0039] Furthermore, the angle between the generatrix of the cone and the horizontal plane is not less than 15 degrees.

[0040] The beneficial effect of the above technical solution is that it can ensure that water can flow smoothly through the conical surface, avoid water stagnation on the conical surface, and thus avoid a large accumulation of water on the bushing.

[0041] Furthermore, the water-blocking cylinder is welded and fixed to the coupling structure or the output shaft of the mechanism.

[0042] The beneficial effects of the above technical solution are that, by fixing it by welding, the connection strength between the water baffle and the output shaft of the coupling structure or mechanism can be guaranteed, and the sealing fit between the water baffle and the output shaft of the coupling structure or mechanism can also be guaranteed.

[0043] Furthermore, a static seal is formed between the bushing and the housing of the mechanism, and the upper end of the static seal mating part is coated with waterproof adhesive.

[0044] The beneficial effect of the above technical solution is that the waterproof adhesive further enhances the waterproof capability of the static seal, thereby further preventing the failure of the static seal. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the connection between the output shaft and the drive shaft in the existing single-pole operation mode;

[0046] Figure 2 This is a schematic diagram showing the connection positions of the output shaft and transmission shaft with the linkage mechanism in the existing three-level linkage mode;

[0047] Figure 3 This is a schematic diagram of the sealing fit between the bushing, the output shaft, and the mechanism housing in the prior art;

[0048] In the diagram: 100, drive shaft; 200, output shaft; 300, cross-slider coupling structure; 301, upper module; 302, lower module; 303, intermediate module; 400, mechanism housing; 500, bushing; 600, first sleeve; 700, three-phase linkage mechanism; 701, connecting rod; 800, second sleeve; 900, main body housing;

[0049] Figure 4 This is a schematic diagram of the rainproof sealing structure of the output shaft of the mechanism in this invention;

[0050] Figure 5 This is a schematic diagram of the assembly of the intermediate module and the water baffle in the rainproof sealing structure of the output shaft of the present invention.

[0051] Figure 6 This is a schematic diagram of the bushing in the rainproof sealing structure of the output shaft of the present invention.

[0052] In the diagram: 10, output shaft of the mechanism; 20, transmission shaft; 30, housing of the mechanism; 40, bushing; 41, conical surface; 50, cross-slider coupling structure; 51, upper module; 52, lower module; 53, intermediate module; 60, water baffle; 70, sleeve. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0055] It should be noted that, in specific embodiments of the present invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the use of phrases such as "comprising a…" to define an element does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0057] In the description of this invention, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the body, or it can be separately arranged from the body and connected to the body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0058] The present invention will be further described in detail below with reference to the embodiments.

[0059] Example 1 of GIS in this invention:

[0060] like Figure 4 As shown, the GIS includes a disconnecting switch and a grounding switch. The disconnecting switch includes a disconnecting switch body, which includes a body housing and a drive shaft 20. The grounding switch includes an operating mechanism, which includes a mechanism housing 30 and a mechanism output shaft 10. The GIS also includes a rainproof sealing structure for the mechanism output shaft and a three-phase linkage mechanism. The rainproof sealing structure for the mechanism output shaft includes a mechanism housing and a mechanism output shaft extending upward through the mechanism housing. In this embodiment, the mechanism housing is the mechanism housing 30 of the grounding switch operating mechanism, and the mechanism output shaft is the mechanism output shaft 10 of the grounding switch operating mechanism.

[0061] A coupling structure connects the end of the mechanism output shaft 10 that extends out of the mechanism housing 30 to the transmission shaft 20. In this embodiment, the coupling structure is a cross-slider coupling structure 50. The cross-slider coupling structure 50 includes an upper module 51 connected to the transmission shaft 20, a lower module 52 integrally connected to the mechanism output shaft 10, and an intermediate module 53 located between the two. The connecting rod of the three-phase linkage mechanism is connected to the transmission shaft 20 through the upper module 51 (not shown in the figure). A sleeve 70 is welded between the main housing and the mechanism housing 30, covering the mechanism output shaft 10, the transmission shaft 20, and the cross-slider coupling structure 50. The sleeve 70 is provided with a clearance opening to avoid the connecting rod. The clearance opening exposes the cross-slider coupling structure 50 and the sealing fit position between the mechanism output shaft 10 and the bushing 40 to the atmospheric environment. In addition, since the cross-slider coupling structure 50 is prior art, the specific structure of the cross-slider coupling structure 50 and its connection with the transmission shaft 20 will not be described in detail.

[0062] A bushing 40 is sealed between the output shaft 10 of the mechanism and the housing 30 of the mechanism, such as... Figure 4 As shown, the bushing 40 has an upward-extending section that extends out of the mechanism housing 30, and a dynamic seal is formed between the bushing 40 and the mechanism output shaft 10, while a static seal is formed between the bushing 40 and the mechanism housing 30. The upper end of the static seal mating area is coated with waterproof adhesive to enhance the waterproof capability of the static seal and prevent its failure.

[0063] The height H of the upper end face of bushing 40 from the upper end face of mechanism housing 30 is 8mm. Figure 4 As shown in the figure, the distance between the upper end face of the bushing 40 and the lower end face of the lower module 52 is increased by 5mm compared to the original 3mm. At this time, the distance between the upper end face of the bushing 40 and the lower end face of the lower module 52 is 2mm. This can reduce the distance between the upper end face of the bushing 40 and the lower end face of the lower module 52 to a certain extent. The reduction of the distance can prevent water from entering the gap between the bushing 40 and the lower module 52, and further prevent water from entering the dynamic seal, thus avoiding the failure of the dynamic seal.

[0064] like Figure 4 and Figure 5 As shown, the outer diameter of the intermediate module 53 is 70mm larger than the outer diameters of the lower module 52 and the upper module 51, an increase of 10mm compared to the original. A water-retaining cylinder 60, extending axially in the vertical direction and fitted around the outer surface of the intermediate module 53, is welded and fixed to its outer circumference. The outer diameter of the intermediate module 53 is equal to the inner diameter of the water-retaining cylinder 60, i.e., the inner diameter of the water-retaining cylinder 60 is 70mm. The upper end of the water-retaining cylinder 60 is welded and sealed to the intermediate module 53. The lower end of the water-retaining cylinder 60 has an open structure, and its inner diameter is larger than the outer diameter of the protruding section of the bushing 40. The lower edge of the bushing 40 is lower than its upper end face. Thus, when the water accumulated on the housing 30 surpasses the lower edge of the water-retaining cylinder 60, a sealed space is formed inside the water-retaining cylinder 60. The pressure inside the water-retaining cylinder 60 increases as the water level rises. According to the principle of air pressure balance, when the pressure inside the water-retaining cylinder 60 rises... When the water level reaches a certain level, a water seal will be formed between the baffle cylinder 60 and the bushing 40. In this case, even if the water level outside the baffle cylinder 60 rises, the water level inside the baffle cylinder 60 will not rise significantly. Furthermore, when the bushing 40 has a suitable axial dimension, the upper end face of the bushing 40 will be higher than the water level inside the baffle cylinder 60 when the water seal is formed. This will prevent water from overflowing the upper end face of the bushing 40 and will also prevent water from entering the dynamic seal between the bushing 40 and the mechanism output shaft 10, thus avoiding failure of the dynamic seal.

[0065] The gap between the inner wall of the water-blocking cylinder 60 and the outer wall of the lower module 52 is 5mm. This ensures that when the middle module 53 moves relative to the lower module 52, there will be no interference between the water-blocking cylinder 60 and the lower module 52, further preventing the water-blocking cylinder 60 from deforming due to interference with the lower module 52.

[0066] In addition, such as Figure 6As shown, the upper end of the bushing 40 is provided with a conical surface 41 connected to the upper end face of the bushing 40, and the angle θ between the generatrix of the conical surface 41 and the horizontal plane is 20 degrees. The lower end of the conical surface 41 is lower than the lower edge of the water baffle 60. In this way, when the output shaft 10 of the mechanism or the cross slider coupling structure 50 vibrates and there is a lot of water on the mechanism housing 30, water may splash onto the upper end face of the bushing 40. At this time, the water can flow down through the conical surface 41, reducing the accumulation of water at the upper end of the bushing 40, thereby reducing the risk of dynamic seal failure in this situation.

[0067] In the GIS of this invention, a water-blocking cylinder is fitted on the coupling structure or output shaft. Since the inner diameter of the water-blocking cylinder is larger than the outer diameter of the through section, and the lower edge of the water-blocking cylinder is lower than the upper end face of the bushing, the water-blocking cylinder covers the outside of the upper end face of the bushing. At the same time, since the water-blocking cylinder is sealed and connected to the coupling structure or output shaft, the upper part of the bushing can also be sealed and shielded by the water-blocking cylinder. In this way, even in rainy weather, falling rainwater cannot fall on the upper end face of the bushing, thereby preventing rainwater from entering the dynamic seal between the bushing and the output shaft, avoiding rust at the dynamic seal, and thus avoiding failure of the dynamic seal, ensuring the reliability of GIS operation. In addition, since the upper end of the baffle is sealed to the intermediate module and the lower end is open, and the lower edge of the baffle is lower than the upper end face of the bushing, when the water on the housing of the mechanism is submerged above the lower edge of the baffle, a water seal will be formed between the baffle and the bushing, so that the water level inside the baffle will not rise. In this case, when the bushing has a suitable axial dimension, it can further prevent the water from submerging above the upper end of the bushing, and thus further prevent the water from entering the dynamic seal between the bushing and the output shaft of the mechanism, further avoiding the failure of the dynamic seal.

[0068] In other embodiments of the GIS, the angle between the generatrix of the cone and the horizontal plane may not be 20 degrees, but rather 15 degrees. In other embodiments, the angle between the generatrix of the cone and the horizontal plane may also be 30 degrees.

[0069] In other embodiments of GIS, the upper outer wall of the bushing does not have a conical surface connected to the upper end face of the bushing, and the upper outer wall of the bushing is a cylindrical surface.

[0070] In other embodiments of the GIS, the distance between the upper end face of the bushing and the lower end face of the lower module may not be equal to 2 mm, but may be equal to 5 mm. In other embodiments, the distance between the upper end face of the bushing and the lower end face of the lower module may also be equal to 1 mm.

[0071] In other embodiments of the GIS, the outer diameter of the intermediate module may not be greater than the outer diameter of the lower module, but may be the same as the outer diameter of the lower module. The water-blocking cylinder includes a cylinder section and a circular top plate fixed to the inner side of the upper end of the cylinder section, and the inner side of the circular top plate is sealed to the outer peripheral surface of the intermediate module.

[0072] In other embodiments of the GIS, the water-blocking cylinder may not be sleeved and connected to the intermediate module, but rather sleeved and sealed to the lower module. In this case, when the outer diameter of the lower module is greater than the outer diameter of the bushing protruding end, the inner wall of the water-blocking cylinder can be sealed and connected to the outer circumferential surface of the lower module. When the outer diameter of the lower module is not greater than the outer diameter of the bushing protruding end, the water-blocking cylinder can be sealed and connected to the outer circumferential surface of the lower module through the inner side of the annular top plate fixed inside it.

[0073] In other embodiments of the GIS, the water-blocking cylinder may not be welded to the intermediate module, but rather connected via a threaded connection. Specifically, the outer circumferential surface of the intermediate module has external threads, and the inner wall of the water-blocking cylinder has internal threads. In other embodiments, the water-blocking cylinder and the intermediate module can also be connected by screws. In this case, a sealing ring must be provided between the water-blocking cylinder and the intermediate module; alternatively, the water-blocking cylinder can be glued to the intermediate module.

[0074] In other embodiments of GIS, the coupling mechanism may not be a cross-slider coupling structure, but a universal coupling.

[0075] In other embodiments of the GIS, the water-blocking cylinder may not be sleeved and connected to the coupling structure, but rather sleeved and connected to the output shaft of the mechanism. In this case, there is a sufficiently large gap between the upper end face of the bushing and the lower end face of the lower module to meet the installation requirements of the water-blocking cylinder.

[0076] In other embodiments of GIS, the upper end of the static seal mating part may not be coated with waterproof adhesive. In this case, water can only be prevented from entering the static seal by relying on the sealing effect of the static seal.

[0077] An embodiment of the rainproof sealing structure for the output shaft of the mechanism in this invention: The specific structure of the rainproof sealing structure for the output shaft of the mechanism is the same as that of the rainproof sealing structure for the output shaft of the mechanism in the above-mentioned GIS embodiment, and will not be repeated here.

[0078] The above description is merely 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 determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A rainproof sealing structure of a mechanism output shaft, comprising a mechanism housing (30) and a mechanism output shaft (10) upwardly penetrating out of the mechanism housing (30), an end of the mechanism output shaft (10) penetrating out of the mechanism housing (30) being connected with a shaft coupling structure, and a shaft sleeve (40) being sealingly assembled between the mechanism output shaft (10) and the mechanism housing (30), the shaft sleeve (40) having a penetrating-out section for upwardly penetrating out of the mechanism housing (30), characterized in that, The water baffle (60) is sleeved and sealingly connected on the output shaft (10) of the coupling structure or mechanism, the opening of the water baffle (60) faces the shaft sleeve (40), the side away from the opening of the water baffle (60) is sealingly matched with the output shaft (10) of the coupling structure or mechanism, the inner diameter of the water baffle (60) is greater than the outer diameter of the penetrating section, and the lower edge of the water baffle (60) is lower than the upper end surface of the shaft sleeve (40) to form a water seal between the water baffle (60) and the shaft sleeve (40).

2. The rain seal for a mechanism output shaft according to claim 1, characterized by, The coupling structure is a cross slider coupling structure (50), the cross slider coupling structure (50) comprises an upper module (51), a lower module (52) connected with the mechanism output shaft (10), and an intermediate module (53) located between the upper module (51) and the lower module (52), and the water baffle (60) is sealingly connected on the intermediate module (53) or the lower module (52).

3. The rain seal for a mechanism output shaft according to claim 2, characterized by, The water baffle (60) is sealingly connected on the intermediate module (53), and the inner diameter of the water baffle (60) is greater than the outer diameter of the lower module (52).

4. The rain seal for a mechanism output shaft according to claim 3, characterized by, The outer diameter of the intermediate module (53) is greater than the outer diameter of the lower module (52), and the inner wall of the water baffle (60) is sealingly connected with the outer peripheral surface of the intermediate module (53).

5. The rain seal for a mechanism output shaft according to any one of claims 2 to 4, characterized in that, The distance between the upper end surface of the shaft sleeve (40) and the lower end surface of the lower module (52) is not greater than 5 mm.

6. The rain seal for a mechanism output shaft according to any one of claims 1 to 4, characterized in that, The upper end of the shaft sleeve (40) is provided with a conical surface (41) connected with the upper end surface of the shaft sleeve (40), and the lower end of the conical surface (41) is lower than the lower edge of the water baffle (60).

7. The rain seal for a mechanism output shaft according to claim 6, wherein The included angle between the generatrix of the conical surface (41) and the horizontal plane is not less than 15 degrees.

8. The rain seal for a mechanism output shaft according to any one of claims 1 to 4, characterized by The water baffle (60) is welded and fixed on the output shaft (10) of the coupling structure or mechanism.

9. The rain seal for a mechanism output shaft according to any one of claims 1 to 4, characterized by A static seal is formed between the shaft sleeve (40) and the mechanism housing (30), and waterproof glue is applied to the upper end of the static seal matching part.

10. A GIS comprising a grounding switch, the grounding switch comprising an operating mechanism, the operating mechanism comprising a mechanism housing and a mechanism output shaft, characterized in that The GIS also comprises a rainproof sealing structure of the mechanism output shaft, the mechanism housing is the mechanism housing (30) in the rainproof sealing structure of the mechanism output shaft, and the mechanism output shaft is the mechanism output shaft (10) in the rainproof sealing structure of the mechanism output shaft; the rainproof sealing structure of the mechanism output shaft comprises the mechanism housing (30) and the mechanism output shaft (10) penetrating upwardly out of the mechanism housing (30), the end of the mechanism output shaft (10) penetrating out of the mechanism housing (30) is connected with a coupling structure, a shaft sleeve (40) is sealingly assembled between the mechanism output shaft (10) and the mechanism housing (30), the shaft sleeve (40) has a penetrating section for penetrating upwardly out of the mechanism housing (30), a water baffle (60) is sleeved and sealingly connected on the output shaft (10) of the coupling structure or mechanism, the opening of the water baffle (60) faces the shaft sleeve (40), the side away from the opening of the water baffle (60) is sealingly matched with the output shaft (10) of the coupling structure or mechanism, the inner diameter of the water baffle (60) is greater than the outer diameter of the penetrating section, and the lower edge of the water baffle (60) is lower than the upper end surface of the shaft sleeve (40) to form a water seal between the water baffle (60) and the shaft sleeve (40).

11. The GIS of claim 10, wherein, The coupling structure is a cross slider coupling structure (50), which comprises an upper module (51), a lower module (52) connected with the mechanism output shaft (10), and an intermediate module (53) located between the upper module (51) and the lower module (52), and the water blocking cylinder (60) is sealingly connected to the intermediate module (53) or the lower module (52).

12. The GIS of claim 11, wherein, The water blocking cylinder (60) is sealingly connected to the intermediate module (53), and the inner diameter of the water blocking cylinder (60) is greater than the outer diameter of the lower module (52).

13. The GIS of claim 12, wherein, The outer diameter of the intermediate module (53) is greater than the outer diameter of the lower module (52), and the inner wall of the water blocking cylinder (60) is sealingly connected to the outer peripheral surface of the intermediate module (53).

14. The GIS of any of claims 11-13, wherein, The distance between the upper end surface of the shaft sleeve (40) and the lower end surface of the lower module (52) is not greater than 5 mm.

15. The GIS of any of claims 10-13, wherein, The upper end of the shaft sleeve (40) is provided with a conical surface (41) connected with the upper end surface of the shaft sleeve (40), and the lower end of the conical surface (41) is lower than the lower edge of the water blocking cylinder (60).

16. The GIS of claim 15, wherein, The included angle between the generatrix of the conical surface (41) and the horizontal plane is not less than 15 degrees.

17. The GIS of any of claims 10-13, wherein, The water blocking cylinder (60) is welded and fixed on the coupling structure or the mechanism output shaft (10).

18. The GIS of any of claims 10-13, wherein, A static seal is formed between the shaft sleeve (40) and the mechanism housing (30), and waterproof glue is applied to the upper end of the static seal matching part.

Images