A post insulator assembly, a GIL and a GIL assembly

Abstract

The application belongs to the field of metal enclosed gas insulated transmission line, and particularly relates to a post insulator assembly, a GIL and a GIL assembly. The GIL assembly comprises a GIL and a clamping piece. The GIL comprises a shell and the post insulator assembly, and a particle trap. The post insulator assembly comprises a post insulator and a metal insert embedded in the post end of the post insulator. The metal insert is elastically floating and guided with a guide block. A grounding electrode is guided and installed on the guide block in a direction perpendicular to the axis of the post insulator. A clamping groove is formed on the side surface of the guide block and communicates with the grounding electrode mounting hole. When the post insulator assembly is installed into the shell of the GIL, the clamping piece is inserted into the clamping groove to clamp the grounding electrode in the grounding electrode mounting hole. After the post insulator assembly is installed in place, the clamping piece is pulled out to prevent the grounding electrode from rubbing against the shell and generating metal debris when the post insulator assembly is installed into the shell.

Description

Technical Field

[0001] This invention belongs to the field of metal-enclosed gas-insulated transmission lines, and in particular relates to a post insulator assembly, GIL and GIL assembly. Background Technology

[0002] GIL (Gas-Insulated Metal Enclosed Transmission Line), also known as a metal-enclosed gas-insulated transmission line, consists of a casing and a central conductor arranged coaxially with the casing. The interior of the casing is filled with insulating gas to achieve insulation between the central conductor and the casing. To address the issue of relative axial movement between the casing and the central conductor due to uneven thermal expansion and contraction during GIL operation, the GIL also includes axially sliding post insulator assemblies to support the axial movement of the central conductor. In addition to the post insulators, the post insulator assemblies also include grounding devices to prevent electric field distortion caused by the floating potential of the metal inserts.

[0003] For example, Chinese invention patent CN109686513B, published on July 10, 2020, discloses a GIL and its post insulator assembly. The post insulator assembly is specifically a three-post insulator assembly, including a post insulator. The central axis of the post insulator coincides with the central axis of the shell and has three radially extending posts. The ends of the posts are fitted with metal inserts. One of the post inserts is provided with a guide block mounting seat. A guide block is guided in the guide block mounting seat in a direction perpendicular to the axis of the post insulator. A grounding electrode is floatably provided in the guide block in a direction perpendicular to the axis of the post insulator by an electrode spring. Under the elastic push of the electrode spring, the grounding electrode is pressed into contact with the inner wall of the shell, realizing grounding conduction between the insert and the shell. During the GIL assembly process, the post insulator assembly is fed into the housing along the housing axis. During this process, the grounding electrode is constantly sliding and rubbing against the inner wall of the housing under the support force of the electrode spring. Such sliding friction will not only wear down the effective length of the grounding electrode and reduce its service life, but the metal particles generated by the wear may also be scattered on the surface of the post insulator and the inner wall of the housing, which may easily cause the internal insulation of the GIL to break down.

[0004] Chinese utility model patent with authorization announcement number CN212462057U and authorization announcement date of February 2, 2021 discloses a flexible grounding device for GIL with foreign object collection function. Specifically, the flexible grounding device has a grounding seat fixedly embedded in the insert, a spring seat sleeved in the middle of the grounding seat, an electrode slot opened on the spring seat, and a grounding electrode set in the electrode slot. The end of the electrode slot facing the shell is a foreign object collection groove with an expanded area. During operation, foreign objects between the grounding electrode and the shell can be accumulated in the foreign object collection groove to prevent foreign objects from falling on the post insulator and causing insulator discharge fault.

[0005] The aforementioned flexible grounding device addresses the issue of foreign objects affecting the internal insulation performance of the GIL by setting up a foreign object collection structure. However, since its spring seat is floating relative to the post insulator, there is still a risk that foreign objects may escape from the collection groove and affect the internal insulation performance of the GIL. Therefore, it is necessary to provide a post insulator assembly that can more reliably guarantee the internal insulation performance of the GIL. Summary of the Invention

[0006] The purpose of this invention is to provide a post insulator assembly to solve the technical problem that the post insulator assembly in the prior art cannot reliably guarantee the internal insulation performance of the GIL; the purpose of this invention is also to provide a GIL and a GIL assembly using the above-mentioned post insulator assembly.

[0007] To achieve the above objectives, the technical solution for the post insulator assembly provided by this invention is as follows:

[0008] A post insulator assembly includes a post insulator and a metal insert embedded in the post end of the post insulator. A guide block is guided within the metal insert in a direction perpendicular to the axis of the post insulator. The end of the guide block facing away from the post insulator is used to mate with the inner wall of the GIL housing. A guide block support spring is provided between the guide block and the metal insert to achieve elastic floating installation of the guide block within the metal insert. A grounding electrode mounting hole extending in a direction perpendicular to the axis of the post insulator is also formed on the guide block. A grounding electrode is guided and installed within the grounding electrode mounting hole to mate with the inner wall of the GIL housing. The grounding electrode is equipped with a grounding electrode support spring at the end facing the metal insert to achieve elastic floating installation of the grounding electrode in the grounding electrode mounting hole. A locking groove communicating with the grounding electrode mounting hole is provided on the side of the guide block. When the post insulator assembly is installed into the housing of the GIL, the grounding electrode is locked in the position retracted into the grounding electrode mounting hole by inserting a locking piece into the locking groove. The locking groove extends along the axial direction of the post insulator, so that the operator can pull out the locking piece in the locking groove after the post insulator assembly is installed in place.

[0009] The beneficial effects are as follows: When assembling the GIL, the grounding electrode is first pressed into the grounding electrode mounting hole, and a locking piece is inserted into the locking slot to lock the grounding electrode, preventing the grounding electrode from being exposed in the grounding electrode mounting hole. Then, the post insulator assembly is installed into the GIL housing. During the process of pushing the post insulator assembly to the installation position, since the grounding electrode is in a state of being retracted into the grounding electrode mounting hole, the grounding electrode will not come into contact with or rub against the inner wall of the housing. This avoids the generation of metal debris due to sliding friction between the grounding electrode and the inner wall of the housing, and eliminates the possibility of debris generated by sliding friction between the grounding electrode and the inner wall of the housing, which could damage the insulation performance inside the housing. This makes the insulation performance inside the corresponding GIL more reliable.

[0010] As a further improvement, the outer peripheral surface of the grounding electrode has a locking groove or locking protrusion for engaging with the locking element.

[0011] The beneficial effect is that by setting a locking groove or locking protrusion on the outer peripheral surface of the grounding electrode, the locking part does not need to be locked with the end of the grounding electrode, thereby reducing the amount of the grounding electrode retracting into the grounding electrode mounting hole and avoiding the grounding electrode from moving a large distance after the locking part is pulled out, which would cause a large impact on the inner wall of the housing.

[0012] As a further improvement, the outer peripheral surface of the grounding electrode has a flange, which constitutes the locking engagement protrusion. The dimension of the locking groove in the direction perpendicular to the axis of the post insulator is not less than the distance between the end of the grounding electrode and the inner wall of the GIL housing when the grounding electrode is locked.

[0013] The beneficial effects are: the flange is designed to cooperate with the locking component, and the flange can also cooperate with the grounding electrode support spring, so that the grounding electrode has the simplest structure possible and is easy to process and manufacture. At the same time, the dimension of the locking groove in the direction perpendicular to the axis of the post insulator is not less than the distance between the end of the grounding electrode when it is locked and the inner wall of the GIL housing. In this way, after the locking component is pulled out, the flange of the grounding electrode enters into the locking groove and does not enter the section of the grounding electrode mounting hole that is closer to the housing than the locking groove, thus avoiding the flange from colliding with the flange at the transition between the grounding electrode mounting hole and the locking groove.

[0014] As a further improvement, the locking groove extends through the guide block on the side away from the central axis of the guide block in a direction perpendicular to the axis of the post insulator and the length extension direction of the grounding electrode mounting hole.

[0015] The beneficial effect is that the locking slot is an open structure, which makes it easy for operators to directly observe the fit between the locking component and the grounding electrode.

[0016] As a further improvement, the end of the grounding electrode mounting hole away from the metal insert has a recess with an area larger than the cross-sectional size of the grounding electrode mounting hole, for storing miscellaneous items.

[0017] The beneficial effect is that by setting up a sink, when the GIL is in use, due to the thermal expansion and contraction, the central conductor and the shell will move axially relative to each other. Naturally, the post insulator assembly will slide relative to the shell. At this time, the metal debris generated by the friction between the grounding electrode and the shell can be collected in the sink, preventing the metal debris from falling on the post insulator post or the inner wall of the shell and affecting the insulation performance inside the GIL.

[0018] To achieve the above objectives, the technical solution for GIL provided by this invention is as follows:

[0019] A gas-insulator (GIL) includes a housing and a post insulator assembly and a particulate trap disposed within the housing. The particulate trap is fixed to the post insulator assembly. The post insulator assembly includes a post insulator and a metal insert embedded in the post end of the post insulator. A guide block is guided within the metal insert in a direction perpendicular to the axis of the post insulator. The end of the guide block facing away from the post insulator is used to mate with the inner wall of the GIL housing. A guide block support spring is provided between the guide block and the metal insert to achieve elastic floating installation of the guide block within the metal insert. A grounding electrode mounting hole extending in a direction perpendicular to the axis of the post insulator is also provided on the guide block. A grounding electrode is guided and installed in the grounding electrode mounting hole to mate with the inner wall of the GIL housing. A grounding electrode support spring is provided at the end of the grounding electrode facing the metal insert to achieve elastic floating installation of the grounding electrode in the grounding electrode mounting hole. A locking groove communicating with the grounding electrode mounting hole is provided on the side of the guide block. When the post insulator assembly is installed into the GIL housing, the grounding electrode is locked in the position retracted into the grounding electrode mounting hole by inserting a locking piece into the locking groove. The locking groove extends along the axial direction of the post insulator, so that the operator can pull out the locking piece in the locking groove after the post insulator assembly is installed in place.

[0020] The beneficial effects are as follows: When assembling the GIL, the grounding electrode is first pressed into the grounding electrode mounting hole, and a locking piece is inserted into the locking slot to lock the grounding electrode, preventing the grounding electrode from being exposed in the grounding electrode mounting hole. Then, the post insulator assembly is installed into the GIL housing. During the process of pushing the post insulator assembly to the installation position, since the grounding electrode is in a state of being retracted into the grounding electrode mounting hole, the grounding electrode will not come into contact with or rub against the inner wall of the housing. This avoids the generation of metal debris due to sliding friction between the grounding electrode and the inner wall of the housing, and eliminates the possibility of debris generated by sliding friction between the grounding electrode and the inner wall of the housing, which could damage the insulation performance inside the housing. This makes the insulation performance inside the GIL more reliable.

[0021] As a further improvement, the outer peripheral surface of the grounding electrode has a locking groove or locking protrusion for engaging with the locking element.

[0022] The beneficial effect is that by setting a locking groove or locking protrusion on the outer peripheral surface of the grounding electrode, the locking part does not need to be locked with the end of the grounding electrode, thereby reducing the amount of the grounding electrode retracting into the grounding electrode mounting hole and avoiding the grounding electrode from moving a large distance after the locking part is pulled out, which would cause a large impact on the inner wall of the housing.

[0023] As a further improvement, the outer peripheral surface of the grounding electrode has a flange, which constitutes the locking engagement protrusion. The dimension of the locking groove in the direction perpendicular to the axis of the post insulator is not less than the distance between the end of the grounding electrode and the inner wall of the GIL housing when the grounding electrode is locked.

[0024] The beneficial effects are: the flange is designed to cooperate with the locking component, and the flange can also cooperate with the grounding electrode support spring, so that the grounding electrode has the simplest structure possible and is easy to process and manufacture. At the same time, the dimension of the locking groove in the direction perpendicular to the axis of the post insulator is not less than the distance between the end of the grounding electrode when it is locked and the inner wall of the GIL housing. In this way, after the locking component is pulled out, the flange of the grounding electrode enters into the locking groove and does not enter the section of the grounding electrode mounting hole that is closer to the housing than the locking groove, thus avoiding the flange from colliding with the flange at the transition between the grounding electrode mounting hole and the locking groove.

[0025] As a further improvement, the locking groove extends through the guide block on the side away from the central axis of the guide block in a direction perpendicular to the axis of the post insulator and the length extension direction of the grounding electrode mounting hole.

[0026] The beneficial effect is that the locking slot is an open structure, which makes it easy for operators to directly observe the fit between the locking component and the grounding electrode.

[0027] As a further improvement, the end of the grounding electrode mounting hole away from the metal insert has a recess with an area larger than the cross-sectional size of the grounding electrode mounting hole, for storing miscellaneous items.

[0028] The beneficial effect is that by setting up a sink, when the GIL is in use, due to the thermal expansion and contraction, the central conductor and the shell will move axially relative to each other. Naturally, the post insulator assembly will slide relative to the shell. At this time, the metal debris generated by the friction between the grounding electrode and the shell can be collected in the sink, preventing the metal debris from falling on the post insulator post or the inner wall of the shell and affecting the insulation performance inside the GIL.

[0029] To achieve the above objectives, the technical solution of the GIL component provided by this invention is as follows:

[0030] A GIL assembly includes a GIL and a locking member for insertion into a locking slot during installation of a post insulator assembly into a housing. The GIL includes a housing and a post insulator assembly and a particulate trap disposed within the housing. The particulate trap is fixed to the post insulator assembly. The post insulator assembly includes a post insulator and a metal insert embedded in the post end of the post insulator. A guide block is guided within the metal insert in a direction perpendicular to the axis of the post insulator. The end of the guide block facing away from the post insulator is used to engage with the inner wall of the housing of the GIL. A guide block support spring is provided between the guide block and the metal insert to achieve elastic floating installation of the guide block within the metal insert. The guide block also has a length... A grounding electrode mounting hole extends perpendicular to the axis of the post insulator. A grounding electrode for mating with the inner wall of the GIL housing is guided and installed in the grounding electrode mounting hole. A grounding electrode support spring is provided at the end of the grounding electrode facing the metal insert to achieve elastic floating installation of the grounding electrode in the grounding electrode mounting hole. A locking groove communicating with the grounding electrode mounting hole is provided on the side of the guide block. When the post insulator assembly is installed into the GIL housing, the grounding electrode is locked in the position retracted into the grounding electrode mounting hole by inserting a locking piece into the locking groove. The locking groove extends along the axis of the post insulator, so that the operator can pull out the locking piece in the locking groove after the post insulator assembly is installed in place.

[0031] The beneficial effects are as follows: When assembling the GIL, the grounding electrode is first pressed into the grounding electrode mounting hole, and a locking piece is inserted into the locking slot to lock the grounding electrode, preventing the grounding electrode from being exposed in the grounding electrode mounting hole. Then, the post insulator assembly is installed into the GIL housing. During the process of pushing the post insulator assembly to the installation position, since the grounding electrode is in a state of being retracted into the grounding electrode mounting hole, the grounding electrode will not come into contact with or rub against the inner wall of the housing. This avoids the generation of metal debris due to sliding friction between the grounding electrode and the inner wall of the housing, and eliminates the possibility of debris generated by sliding friction between the grounding electrode and the inner wall of the housing, which could damage the insulation performance inside the housing. This makes the insulation performance inside the GIL more reliable.

[0032] As a further improvement, the outer peripheral surface of the grounding electrode has a locking groove or locking protrusion for engaging with the locking element.

[0033] The beneficial effect is that by setting a locking groove or locking protrusion on the outer peripheral surface of the grounding electrode, the locking part does not need to be locked with the end of the grounding electrode, thereby reducing the amount of the grounding electrode retracting into the grounding electrode mounting hole and avoiding the grounding electrode from moving a large distance after the locking part is pulled out, which would cause a large impact on the inner wall of the housing.

[0034] As a further improvement, the outer peripheral surface of the grounding electrode has a flange, which constitutes the locking engagement protrusion. The dimension of the locking groove in the direction perpendicular to the axis of the post insulator is not less than the distance between the end of the grounding electrode and the inner wall of the GIL housing when the grounding electrode is locked.

[0035] The beneficial effects are: the flange is designed to cooperate with the locking component, and the flange can also cooperate with the grounding electrode support spring, so that the grounding electrode has the simplest structure possible and is easy to process and manufacture. At the same time, the dimension of the locking groove in the direction perpendicular to the axis of the post insulator is not less than the distance between the end of the grounding electrode when it is locked and the inner wall of the GIL housing. In this way, after the locking component is pulled out, the flange of the grounding electrode enters into the locking groove and does not enter the section of the grounding electrode mounting hole that is closer to the housing than the locking groove, thus avoiding the flange from colliding with the flange at the transition between the grounding electrode mounting hole and the locking groove.

[0036] As a further improvement, the locking groove extends through the guide block on the side away from the central axis of the guide block in a direction perpendicular to the axis of the post insulator and the length extension direction of the grounding electrode mounting hole.

[0037] The beneficial effect is that the locking slot is an open structure, which makes it easy for operators to directly observe the fit between the locking component and the grounding electrode.

[0038] As a further improvement, the end of the grounding electrode mounting hole away from the metal insert has a recess with an area larger than the cross-sectional size of the grounding electrode mounting hole, for storing miscellaneous items.

[0039] The beneficial effect is that by setting up a sink, when the GIL is in use, due to the thermal expansion and contraction, the central conductor and the shell will move axially relative to each other. Naturally, the post insulator assembly will slide relative to the shell. At this time, the metal debris generated by the friction between the grounding electrode and the shell can be collected in the sink, preventing the metal debris from falling on the post insulator post or the inner wall of the shell and affecting the insulation performance inside the GIL.

[0040] As a further improvement, at least two grounding electrode mounting holes are provided side by side on the guide block in a direction perpendicular to the axis of the post insulator and the length extension direction of the grounding electrode mounting hole. A corresponding locking groove is provided for each grounding electrode mounting hole. The locking component includes a locking component body and a support arm that extends relative to the locking component body and corresponds to each locking groove. The locking component is locked with the corresponding grounding electrode through the end of the support arm. The solid structure between two adjacent support arms and the corresponding two locking grooves is guided and engaged.

[0041] The beneficial effects are: the locking component has a support arm that cooperates with multiple locking slots, so that one locking component can lock multiple grounding electrodes. The solid structure guiding cooperation between the locking component and the adjacent locking slot can prevent the locking component from moving randomly when it is pulled out and colliding with the guide block to generate metal fragments.

[0042] As a further improvement, the outer peripheral surface of the grounding electrode has a flange, which forms the locking engagement protrusion. The end of the locking member used to engage with the grounding electrode has a groove that engages with the portion of the grounding electrode located above the flange.

[0043] The beneficial effects are: the slot is designed to cooperate with the grounding electrode. In fact, the slot is used to avoid the part of the grounding electrode located above the flange, so that the locking part and the grounding electrode have a larger insertion fit and a larger blocking fit, ensuring that the locking part can stably and reliably lock the grounding electrode.

[0044] As a further improvement, the locking component is provided with a cable connection structure for connecting the cable.

[0045] The beneficial effects are: during use, a cable can be connected to the locking component. After pushing the post insulator assembly to a deeper position inside the housing, the locking component can be pulled out of the locking slot by pulling the cable, which improves the convenience of GIL assembly operation. Attached Figure Description

[0046] Figure 1 This is a partial structural diagram of the locking component and the grounding electrode during assembly in Embodiment 1 of the GIL component of the present invention.

[0047] Figure 2 This is a schematic diagram of the guide block in Embodiment 1 of the GIL component of the present invention;

[0048] Figure 3 This is a schematic diagram of the structure of the locking component and guide block in embodiment 1 of the GIL component in this invention;

[0049] Figure 4 for Figure 1 Enlarged view of a portion of point A in the middle;

[0050] Figure 5 This is a schematic diagram of the locking component in Embodiment 1 of the GIL component of the present invention.

[0051] 1. Housing; 2. Particle trap; 3. Post insulator; 4. Metal insert; 5. Guide block mounting groove; 6. Guide block; 7. Mounting hole; 8. First screw; 9. First spring; 10. Top cover; 11. Grounding electrode mounting hole; 12. Grounding electrode; 13. Flange; 14. Second spring; 15. Slot; 16. Locking slot; 17. Locking plate; 18. Plate body; 19. Support arm; 20. Slot; 21. Wiring hole; 22. Pull wire; 23. Closing ring. Detailed Implementation

[0052] 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.

[0053] 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.

[0054] It should be noted that 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 process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the process or method that includes said element.

[0055] 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.

[0056] In the description of this invention, it should be noted that, 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 main body, or it can be separately arranged from the main body and connected to the main 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.

[0057] The present invention will be further described in detail below with reference to the embodiments.

[0058] Specific embodiment 1 of the GIL component provided by this invention:

[0059] The GIL assembly includes the GIL and locking components used during GIL assembly. For example... Figure 1 As shown, the GIL includes a housing 1, a post insulator assembly disposed within the housing 1, and a particulate trap 2. The housing 1 is cylindrical, and a central conductor (not shown) is coaxially disposed inside it. The post insulator assembly provides insulating support between the central conductor and the housing 1. In operation, the housing 1 is filled with insulating gas to provide insulating protection between the central conductor and the housing 1.

[0060] The post insulator assembly includes post insulators 3 made of insulating material. Each post insulator 3 has three posts arranged radially. In use, the post insulator 3 is coaxially mounted within the housing 1. A metal insert 4 is fixedly embedded at the end of one of the posts of the post insulator 3. The metal insert 4 has a guide block mounting groove 5. A guide block 6 is installed within the guide block mounting groove 5. The guide block 6 is guided within the groove 5 by its side engaging with the groove wall, with the guiding direction perpendicular to the axis of the post insulator 3. Additionally, a mounting hole 7, a cylindrical countersunk hole, is provided in the center of the guide block 6. Corresponding to the mounting hole 7, a threaded hole is provided at the bottom of the guide block mounting groove 5. During installation, a first screw 8 is inserted into the mounting hole 7 and screwed into the threaded hole at the bottom of the guide block mounting groove 5. The screw head of the first screw 8 engages with the stepped surface of the cylindrical countersunk hole, locking the guide block 6 within the guide block mounting groove 5. A guide block support spring is also provided between the guide block 6 and the metal insert 4. In this embodiment, the guide block support spring is a helical first spring 9, which is sleeved on the first screw 8. The length of the portion of the first screw 8 above the bottom of the guide block mounting groove 5 is greater than the small diameter of the mounting hole 7. Together with the first spring 9, the guide block 6 can elastically float within the guide block mounting groove 5. In this embodiment, the guide block 6 is made of nylon; in other embodiments, the guide block can be made of other insulating materials.

[0061] The particulate trap 2 is fixed to the post insulator assembly by screws, specifically to the metal insert 4. The end face of the particulate trap 2 is flush with the wall of the guide block mounting groove 5, together guiding the guide block 6.

[0062] In this embodiment, as shown... Figure 2 As shown, the part of the guide block 6 that mates with the guide block mounting groove 5 is cylindrical. The top of the cylindrical structure has a top cover 10 with a cross-sectional area larger than that of the cylindrical part. The top surface of the top cover 10 is a curved surface adapted to the inner wall surface of the housing 1. A grounding electrode mounting hole 11 is provided on the guide block 6, penetrating the top cover 10 and the cylindrical part. A grounding electrode 12 is installed in the grounding electrode mounting hole 11. The section of the grounding electrode 12 facing the housing 1 is a large-diameter section, and the section facing the metal insert 4 is a small-diameter section. The transition between the large-diameter section and the small-diameter section has a flange 13 with a diameter larger than that of the large-diameter section. A grounding electrode support spring is installed in the grounding electrode mounting hole 11. In this embodiment, the grounding electrode support spring is a helical second spring 14. The upper end of the second spring 14 engages with the small-diameter section of the grounding electrode 12, and the lower end abuts against the bottom of the guide block mounting groove 5. This achieves elastic floating installation of the grounding electrode 12 in the grounding electrode mounting hole 11, while simultaneously achieving grounding conductivity between the metal insert 4 and the housing 1. It also provides lubrication when the post insulator 3 moves axially within the housing 1 due to the thermal stress of the central conductor. Two grounding electrode mounting holes 11 are provided on the guide block 6, and one grounding electrode 12 is installed in each grounding electrode mounting hole 11. Figure 1 As shown, in a plane perpendicular to the axis of the post insulator 3, the axes of the two grounding electrode mounting holes 11 and 7 are arranged parallel to each other at intervals. In other embodiments, the number of grounding electrodes may be more than two. In this embodiment, the grounding electrode 12 is made of graphite; in other embodiments, the grounding electrode may be made of other conductive materials, such as copper.

[0063] like Figure 3 As shown, the grounding electrode mounting hole 11 has a recessed groove 15 with a cross-sectional area larger than that of the grounding electrode mounting hole 11 at one end near the housing 1, for collecting debris. Under the push of the first spring 9, the top cover 10 fits against the inner wall of the housing 1, thereby sealing the recessed groove 15 and ensuring that debris does not easily escape. Figure 1 and Figure 4 As shown, a constricting convex ring 23 is provided at the transition between the sink 15 and the grounding electrode mounting hole 11, which protrudes inward relative to the hole wall of the grounding electrode mounting hole 11. The constricting convex ring 23 is guided and engaged with the large diameter section of the grounding electrode 12.

[0064] like Figure 2As shown, two locking grooves 16 are formed on the side of the columnar portion of the guide block 6. The locking grooves 16 extend along the axis of the post insulator 3 and communicate with the grounding electrode mounting hole 11. Specifically, the locking grooves 16 extend to the central axis of the corresponding grounding electrode mounting hole 11, and the width of the locking grooves 16 is greater than the diameter of the grounding electrode mounting hole 11. To facilitate observation of the position of the grounding electrode 12, the side of the locking groove 16 away from the central axis of the guide block 6 penetrates the guide block 6 in a direction perpendicular to the axis of the post insulator 3 and the length extension direction of the grounding electrode mounting hole 11, making the locking groove an open structure. The position of the flange 13 on the grounding electrode 12 satisfies the following condition: when the end face of the flange 13 away from the small diameter section is flush with the bottom surface of the locking groove 16, the grounding electrode 12 does not expose the grounding electrode mounting hole 11. In other embodiments, the locking groove can also penetrate the guide block on both sides, thus forming a locking groove on the guide block.

[0065] The locking component is specifically the locking plate 17, such as... Figure 5 As shown, the locking plate 17 includes a rectangular plate 18, which serves as the locking body of the locking component. Two support arms 19 extend from one end of the plate 18. The ends of the support arms 19 have arc-shaped slots 20 that are adapted to the large-diameter section of the grounding electrode 12. A wiring hole 21 is located at the end of the plate 18 away from the support arms 19 for connecting the pull wire 22. The positional relationship of the two support arms 19 is adapted to the positional relationship of the two locking slots 16, so that the two support arms 19 can be inserted into the two locking slots 16 respectively. At the same time, the groove-shaped structure formed by the two support arms 19 and the plate 18 guides and cooperates with the solid part of the guide block 6 located between the two locking slots 16.

[0066] During assembly, the grounding electrode 12 and the second spring 14 are sequentially inserted into the end of the grounding electrode mounting hole 11 facing the metal insert 4. The first screw 8 is inserted into the mounting hole 7, and the first spring 9 is fitted onto the end of the first screw 8 that protrudes from the mounting hole 7. Then, the assembled assembly is inserted into the guide block mounting groove to complete the assembly of the post insulator assembly. Before inserting the post insulator assembly into the housing 1, the grounding electrode 12 is pressed into the grounding electrode mounting hole 11 so that the grounding electrode does not protrude from the grounding electrode mounting hole 11. Then, the locking plate 17 is inserted into the locking groove 16. The support arm 19 engages with the large diameter section of the grounding electrode 12 through the locking groove 16 and stops with the flange 13, thereby locking the grounding electrode 12 in the grounding electrode mounting hole 11. Then, the post insulator assembly is pushed into the housing 1. After the post insulator assembly is installed in place, the locking plate 17 is pulled out from the locking slot 16 by pulling the pull wire 22, thus completing the installation of the post insulator assembly in the housing 1. Since the grounding electrode 12 is retracted into the grounding electrode mounting hole 11, the grounding electrode 12 will not rub against the inner wall of the housing 1 during the process of the post insulator assembly moving to the installation position, thus avoiding the metal debris generated by the friction between the grounding electrode 12 and the inner wall of the housing 1 from affecting the insulation performance inside the GIL.

[0067] In this embodiment, the flange 13 is provided to stop and lock the locking plate 17. At the same time, the flange 13 is also provided to stop the second spring 14, so as to achieve a stable engagement between the second spring 14 and the grounding electrode 12, and to ensure that the structure of the grounding electrode 12 is as simple as possible.

[0068] Regarding the dimension of the locking groove 16 in the length extension direction of the grounding electrode mounting hole 11, that is, the dimension perpendicular to the axis of the post insulator, in this embodiment, it is not less than the distance between the end of the grounding electrode 12 when it is locked and the inner wall of the housing 1 of the GIL. In this way, after the locking plate 17 is pulled out, the flange 13 will only move into the locking groove 16 and will not enter the section of the grounding electrode mounting hole 11 on the side of the housing 1 relative to the locking groove 16.

[0069] The specific embodiment 2 of the GIL component provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, a flange is provided on the outer peripheral surface of the grounding electrode as a locking protrusion to engage with the locking component. In this embodiment, a protrusion is provided on the outer peripheral surface of the grounding electrode as a locking protrusion to engage with the locking component.

[0070] The specific embodiment 3 of the GIL component provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, a flange is provided on the outer peripheral surface of the grounding electrode as a locking protrusion to engage with the locking component. In this embodiment, a locking groove is machined on the outer peripheral surface of the grounding electrode as a locking groove to engage with the locking component. The locking groove can be an annular groove or a straight groove machined on the outer peripheral surface of the grounding electrode.

[0071] The specific embodiment 4 of the GIL component provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, the locking element is a locking plate with two support arms, allowing one locking element to simultaneously engage with two locking slots. In this embodiment, one locking element is provided for each locking slot. The locking element can also be a round rod-shaped locking pin, which engages with a flange on the grounding electrode through its end. Alternatively, a round hole can be formed on the grounding electrode for insertion into the locking pin.

[0072] The specific embodiment 5 of the GIL component provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, the guide block is locked in the guide block mounting groove on the metal insert by a first screw. In this embodiment, the guide block only engages with the guide block mounting groove on the metal insert, and to prevent the guide block from coming out of the guide block mounting groove, the guide block and the metal insert have a larger engagement range.

[0073] The specific embodiment 6 of the GIL component provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, a wiring hole is provided on the locking plate, and a pull wire is connected in the connection hole as a cable, allowing the operator to pull out the locking component after the post insulator assembly is installed. In this embodiment, a waist-shaped structure is machined on the locking component to form a small-diameter section, and a pull wire is tied to the small-diameter section as a rope to pull the locking component. In other embodiments, the cable can also be a chain.

[0074] An embodiment of GIL in this invention:

[0075] The GIL embodiment is the GIL described in any of the embodiments 1 to 6 of the GIL component described above, and will not be specifically described here. When assembling this GIL, a rigid component that can cooperate with the locking slot and the grounding electrode can be found at the assembly site as the locking component.

[0076] Embodiments of the post insulator assembly in this invention:

[0077] The embodiments of the post insulator assembly are those described in any of the embodiments 1 to 6 of the GIL assembly described above, and will not be specifically described here. When assembling a GIL using this post insulator assembly, a rigid component that can mate with the locking slot and the grounding electrode can be found at the assembly site.

[0078] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A post insulator assembly, comprising a post insulator (3) and a metal insert (4) embedded in the post end of the post insulator (3), wherein a guide block (6) is provided in the metal insert (4) in a direction perpendicular to the axis of the post insulator, one end of the guide block (6) facing away from the post insulator (3) is used to cooperate with the inner wall of the housing (1) of the GIL, and a guide block support spring is provided between the guide block (6) and the metal insert (4) to realize the elastic floating installation of the guide block (6) in the metal insert (4), and a grounding electrode mounting hole (11) extending in a direction perpendicular to the axis of the post insulator is also provided on the guide block (6), wherein a grounding electrode (12) is guided and installed in the grounding electrode mounting hole (11) to cooperate with the inner wall of the housing (1) of the GIL, and a grounding electrode support spring is provided at the end of the grounding electrode (12) facing the metal insert (4) to realize the elastic floating installation of the grounding electrode (12) in the grounding electrode mounting hole (11), characterized in that, The guide block (6) has a locking groove (16) on its side that communicates with the grounding electrode mounting hole (11). When the post insulator assembly is installed into the housing (1) of the GIL, the grounding electrode (12) is locked in the position retracted into the grounding electrode mounting hole (11) by inserting a locking piece into the locking groove (16). The locking groove (16) extends along the axial direction of the post insulator (3), so that the operator can pull out the locking piece in the locking groove (16) after the post insulator assembly is installed in place. The outer circumferential surface of the grounding electrode (12) has a locking mating groove or locking mating protrusion for cooperating with the locking piece. The dimension of the locking groove (16) in the direction perpendicular to the axial direction of the post insulator is not less than the distance between the end of the grounding electrode (12) when it is locked and the inner wall of the housing (1) of the GIL.

2. The post insulator assembly according to claim 1, characterized in that, The outer peripheral surface of the grounding electrode has a flange (13), which constitutes the locking engagement protrusion.

3. The post insulator assembly according to any one of claims 1-2, characterized in that, In a direction perpendicular to the axis of the post insulator and the length extension direction of the grounding electrode mounting hole, the locking groove (16) penetrates the guide block (6) on at least one side.

4. The post insulator assembly according to any one of claims 1-2, characterized in that, The grounding electrode mounting hole (11) has a recess (15) at the end of the hole away from the metal insert (4) with an area larger than the cross-section of the grounding electrode mounting hole (11) for storing miscellaneous items.

5. A GIL comprising a housing (1) and a post insulator assembly and a particulate trap (2) disposed within the housing (1), the particulate trap (2) being fixed to the post insulator assembly, characterized in that, The post insulator assembly is the post insulator assembly as described in any one of claims 1-4.

6. A GIL component, comprising a GIL, characterized in that, The GIL is the GIL of claim 5, and the GIL assembly further includes a locking member for inserting into the locking slot (16) when installing the post insulator assembly into the housing (1).

7. The GIL component according to claim 6, characterized in that, At least two ground electrode mounting holes (11) are provided side by side on the guide block (6) in a direction perpendicular to the axis of the post insulator and the length extension direction of the ground electrode mounting hole. A corresponding locking groove (16) is provided for each ground electrode mounting hole (11). The locking member includes a locking member body and a support arm (19) that extends relative to the locking member body and corresponds one-to-one with each locking groove (16). The locking member is locked and engaged with the corresponding ground electrode (12) through the end of the support arm (19). The solid structure between the two adjacent support arms (19) and the two corresponding locking grooves (16) is guided and engaged.

8. The GIL component according to claim 6 or 7, characterized in that, The outer peripheral surface of the grounding electrode (12) has a flange (13), which constitutes the locking engagement protrusion. The end of the locking member used to engage with the grounding electrode (12) has a groove (20) that engages with the part of the grounding electrode located above the flange.

9. The GIL component according to claim 6 or 7, characterized in that, The locking component has a cable connection structure for connecting the cable.

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