Pluggable tubular bus terminal mounting process for SF6 gas switch cabinet

Abstract

The invention relates to the technical field of fixed insulation tubular bus installation, in particular to an SF6 gas switch cabinet plug-in type tubular bus terminal installation process, which comprises the following steps of: stripping and cutting an outer sheath layer, an outer shielding layer and an insulation layer at the end part of a tubular bus to be installed; a first inner cone assembly is installed on the exposed conductor tube; insulating silicone grease is smeared on the exposed insulating layer, and a second inner cone assembly is installed on the insulating layer; a third inner cone assembly is installed on the outer sheath layer; insulating silicone grease is coated on the inner wall of the adapter socket or the outer wall of the silica gel taper sleeve, the end part of the tubular bus to be mounted is inserted into the adapter socket, a grounding wire and a thermal shrinkage or cold shrinkage terminal sleeve are mounted between the adapter socket and the flange plate, and the adapter socket and the flange plate are fixed. According to the installation process of the plug-in type tubular bus terminal, the whole installation process adopts a full-dry type structural design, the sealing problem of the top of the terminal is fundamentally solved, the SF6 gas leakage risk is completely eradicated, and the operation safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fixed insulating tube mother installation, and in particular to an installation process for a plug-in tube mother terminal head of an SF6 gas switch cabinet. Background Art

[0002] With the advancement of power transmission and distribution technology, tubular busbars are undergoing a technological evolution from a semi-insulated to a fully insulated structure. Fully insulated tubular busbars, due to their excellent electrical performance and environmental adaptability, are widely used in high-voltage power transmission and distribution. This is particularly true when used in conjunction with vacuum and SF6 gas maintenance-free electrical equipment, such as SF6 gas-insulated switchgear, which require high sealing performance. Traditional busbar hard-wiring methods, which struggle to meet these high sealing requirements, are gradually being replaced by new connection structures. In such equipment, initial installation of the tubular busbars places higher demands on the quality of the cable terminals. Improper installation can lead to failures later in operation, resulting in difficult and costly repairs.

[0003] Significant advances have been made in the manufacturing of solid-insulated tubular busbars. The industry now generally adopts an advanced production process similar to the three-layer co-extrusion method used for cables, enabling the one-shot molding of the busbar body. This process utilizes high-quality EPDM rubber as the primary insulating material, resulting in busbars with significantly superior electrical insulation performance compared to traditional cables. However, with the widespread adoption of fully insulated tubular busbar systems, the design and installation of terminal connectors present new challenges.

[0004] The development of new tube-mother plug-in cable heads provides an innovative approach to solving connection problems, but the stability of their electrical insulation performance is highly dependent on the installation process. In existing technologies, there is a lack of systematic specifications for the installation process of this type of cable head, and a mature process method has not yet been formed to ensure the reliability of the insulation interface, the integrity of the sealing structure, and the uniformity of the electric field distribution. This technological gap leads to potential risks such as insulation breakdown and partial discharge during the operation of the cable head, which restricts the overall performance improvement and engineering application promotion of the fully insulated tube-mother system. Especially in vacuum and SF6 gas maintenance-free electrical equipment with strict sealing requirements, process defects in the early stage of installation may cause long-term operation risks, further highlighting the need to develop standardized installation processes. Summary of the Invention

[0005] The purpose of the present invention is to provide an SF6 gas switch cabinet plug-in tube mother terminal head installation process to solve the technical problem of how to achieve the reliability of the insulation interface of the tube mother plug-in cable head, the integrity of the sealing structure and the uniformity of the electric field distribution.

[0006] The present invention is achieved through the following technical solution: a process for installing a pluggable female pipe terminal head of an SF6 gas switch cabinet, wherein the female pipe includes an outer sheath layer, an outer shielding layer, an insulating layer and a conductor pipe from the outside to the inside, including the following steps:

[0007] Obtain the mother tube, first inner cone assembly, second inner cone assembly, third inner cone assembly and adapter socket to be installed, and perform standardized inspection;

[0008] Stripping the outer sheath layer of the female end of the pipe to be installed, measuring the outer shielding layer end from the outer sheath layer end upwards, stripping the remaining outer shielding layer, and performing surface treatment on the measured outer shielding layer end, measuring the insulation layer end from the outer shielding layer end upwards, stripping the remaining insulation layer, and performing surface treatment on the measured insulation layer end;

[0009] Installing a first inner cone assembly on the conductor tube at the end of the insulating layer, the first inner cone assembly includes a stop washer, a stop ring and a conversion head, wherein the stop washer is arranged adjacent to the end of the insulating layer, the conversion head is arranged at the end of the conductor tube, and the stop ring is arranged between the stop washer and the conversion head;

[0010] Applying insulating silicone grease on the insulating layer, and installing the second inner cone assembly on the insulating layer, wherein the second inner cone assembly includes a silicone cone sleeve, wherein the small end of the silicone cone sleeve is wrapped around the stop washer, and the large end of the silicone cone sleeve is attached to the outer shielding layer;

[0011] Installing a third inner cone assembly on the outer sheath layer, the third inner cone assembly comprising a terminal sleeve, a flange, and a dustproof sealing ring, wherein the terminal sleeve is installed on the outer sheath layer, and the flange and the dustproof sealing ring are installed on the terminal sleeve;

[0012] Apply insulating silicone grease to the inner wall of the adapter socket or the outer wall of the silicone cone sleeve, insert the female end of the pipe to be installed into the adapter socket, install the grounding wire and heat shrink or cold shrink terminal sleeve between the adapter socket and the flange, and fix the adapter socket to the flange.

[0013] According to a preferred embodiment, a first inner cone assembly is installed on the conductor tube at the end of the insulating layer, specifically comprising:

[0014] Put the stop washer, stop ring and conversion head onto the conductor tube, and determine the screw hole processing position according to the mounting holes on the stop ring and conversion head;

[0015] The stop washer, the stop ring and the conversion head are removed from the conductor tube, non-through screw holes are processed on the conductor tube based on the screw hole processing positions, and the first inner cone assembly is installed through the non-through screw holes.

[0016] According to a preferred embodiment, the step further includes: grinding the burrs on the edges of the non-through screw holes.

[0017] According to a preferred embodiment, the step further includes chamfering the tube opening of the conductor tube.

[0018] According to a preferred embodiment, the step further includes sealing the interior of the conductor tube.

[0019] According to a preferred embodiment, before installing the second inner cone assembly, the step further includes cleaning the insulating layer with an alcohol cloth.

[0020] According to a preferred embodiment, the terminal sleeve is installed and fixed by using one of a heat shrink tube, a covering tape or a cold shrink silicone.

[0021] According to a preferred embodiment, before applying insulating silicone grease to the inner wall of the adapter socket or the outer wall of the silicone cone sleeve, the step further includes cleaning the inner wall of the adapter socket or the outer wall of the silicone cone sleeve with an alcohol cloth.

[0022] According to a preferred embodiment, the measured length of the outer shielding layer is 70 mm, the measured length of the insulating layer is 150 mm, the exposed length of the conductor tube is 85 mm, the outer diameter of the insulating layer is 94±1 mm, and the outer diameter of the conductor tube is 60 mm.

[0023] According to a preferred embodiment, during the process of fixing the adapter socket to the flange, a torque no greater than 50 Nm is used to advance the fixing bolts connecting the flange and the adapter socket.

[0024] The technical solution for the installation process of the plug-in female pipe terminal head of the SF6 gas switch cabinet provided by the present invention has at least the following advantages and beneficial effects: (1) The full dry structure design is adopted, which fundamentally solves the problem of sealing the top of the terminal, eliminates the risk of SF6 gas leakage, and improves the safety of operation; (2) The stress cone structure is integrated inside the silicone cone sleeve, which effectively weakens the surface creepage effect by optimizing the electric field distribution of the terminal head, and significantly improves the voltage resistance and anti-creeping performance of the terminal; (3) The female pipe end and the adapter socket adopt a high-precision matching design, which greatly reduces the existence of air gaps and reduces the risk of local discharge caused by air gaps. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the process for installing a pluggable female pipe terminal for an SF6 gas switch cabinet provided in Example 1 of the present invention;

[0026] Figure 2 A schematic diagram of a stepped structure provided in Example 1 of the present invention;

[0027] Figure 3 Schematic diagram of screw hole machining position determination provided in Example 1 of the present invention;

[0028] Figure 4 Schematic diagram of screw hole processing provided in Example 1 of the present invention;

[0029] Figure 5 This is a schematic diagram of the installation of the first inner cone assembly provided in Example 1 of the present invention;

[0030] Figure 6 This is a schematic diagram of the installation of the third inner cone assembly provided in Example 1 of the present invention;

[0031] Figure 7 This is a schematic diagram of the installation of the second inner cone assembly provided in Example 1 of the present invention;

[0032] Figure 8 Schematic diagram of the installation of the adapter socket provided in Example 1 of the present invention;

[0033] Figure markings: 100-outer sheath layer, 200-outer shielding layer, 300-insulating layer, 400-conductor tube, 500-first inner cone assembly, 510-stop gasket, 520-stop ring, 530-conversion head, 600-second inner cone assembly, 610-stress cone, 700-third inner cone assembly, 710-terminal sleeve, 720-flange, 730-dustproof sealing ring, 800-adapter socket. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Example 1

[0036] In order to fundamentally solve the problem of terminal top sealing, eliminate the risk of SF6 gas leakage, and improve operation safety, the present invention proposes an SF6 gas switch cabinet plug-in female terminal head installation process.

[0037] The SF6 gas switch cabinet plug-in female pipe terminal installation process of the present invention adopts a fully dry structural design for the installation of the female pipe terminal, abandons the traditional SF6 gas or liquid medium sealing method, and adopts solid insulating materials and an integrated sealing design, which can fundamentally eliminate the risk of insulation failure caused by gas leakage, thereby improving operational safety.

[0038] First of all, it should be noted that the industry currently generally adopts an advanced production process similar to the three-layer co-extrusion of cables, which realizes the one-time molding of the busbar body. The busbar body includes an outer sheath layer 100, an outer shielding layer 200, an insulating layer 300 and a conductor tube 400 from the outside to the inside.

[0039] The following describes the installation process of this embodiment in conjunction with the specific structure of the tube mother. Figure 1 As shown in the figure, the installation process of the pluggable female pipe terminal head of the SF6 gas switch cabinet includes the following steps:

[0040] Step 1: Standardized inspection of components and establishment of installation environment;

[0041] Obtain the mother tube to be installed, the first inner cone assembly 500, the second inner cone assembly 600, the third inner cone assembly 700 and the adapter socket 800, and perform a standardized inspection; the standardized inspection includes checking whether each component is intact and whether the plane is deformed, etc., and there is no specific limitation here.

[0042] Installation should be carried out in an environment that is rainy, humid, dusty, corrosive, or cold. If the above conditions are not met, a shed can be built, which will not be described in detail here.

[0043] Step 2: Strip the end of the female tube to form a stepped structure for installing the terminal head;

[0044] In this embodiment, the stepped structure is composed of an outer sheath layer 100 at the female end of the tube, an exposed outer shielding layer 200, an exposed insulating layer 300, and an exposed conductor tube 400. Figure 2 As shown; the forming method of the stepped structure is as follows:

[0045] First, the outer sheath layer 100 of the end portion of the female pipe to be installed is stripped. In some embodiments, the stripping length of the outer sheath layer 100 is 305 mm. It should be noted that when performing the stripping of the stepped structure, damage to the next layer should be avoided.

[0046] Furthermore, the end of the outer shielding layer 200 is measured upward from the end of the outer sheath layer 100, the remaining outer shielding layer 200 is stripped, and the measured end of the outer shielding layer 200 is surface treated; in some embodiments, the stripping length of the outer shielding layer 200 is 235 mm, and the remaining length of the exposed outer shielding layer 200 is 70 mm. The surface treatment performed on the end of the outer shielding layer 200 includes grinding and polishing the outer shielding layer 200 to ensure that the outer shielding layer 200 is polished smooth and there is no obvious step when touched by hand.

[0047] Furthermore, the end of the insulating layer 300 is measured upward from the end of the outer shielding layer 200, the remaining insulating layer 300 is stripped, and the measured end of the insulating layer 300 is surface treated; in some embodiments, the stripping length of the insulating layer 300 is 85 mm, the remaining length of the exposed insulating layer 300 is 150 mm, and the outer diameter of the insulating layer 300 is 94±1 mm. The surface treatment performed on the end of the insulating layer 300 includes grinding and polishing the insulating layer 300 to ensure that the insulating layer 300 is smooth and flat without bumps, scars, or semi-conductive particles; it should be noted that in order to achieve the desired grinding and polishing effect, different grades of sandpaper can be used in sequence during the grinding process until a round surface is formed on the insulating layer 300 and the outer shielding layer 200; in addition, in order to avoid affecting other layers during the grinding process of the insulating layer 300 and the outer shielding layer 200, protection can be optionally provided for other layers, such as wrapping the outer sheath layer 100 at the female end of the pipe and the conductor tube 400 with plastic wrap.

[0048] Furthermore, the length of the exposed conductor tube 400 is 85 mm, and the outer diameter of the conductor tube 400 is 60 mm; in some embodiments, the conductor tube 400 is processed, the pipe mouth of the conductor tube 400 is chamfered, and the interior of the conductor tube 400 is sealed to prevent rainwater and moisture from entering the interior of the adapter through the conductor tube 400.

[0049] Step 3: Install the first inner cone assembly 500 on the conductor tube 400 at the end of the insulating layer 300;

[0050] In this embodiment, the first inner cone assembly 500 serves as the part of the adapter inner cone assembly corresponding to the conductor tube 400, and includes a stop gasket 510, a stop ring 520 and a conversion head 530; wherein, the stop gasket 510 is arranged adjacent to the end of the insulating layer 300, the conversion head 530 is arranged at the end of the conductor tube 400, and the stop ring 520 is arranged between the stop gasket 510 and the conversion head 530.

[0051] In some embodiments, a first inner cone assembly 500 is installed on the conductor tube 400 at the end of the insulating layer 300, specifically comprising: Figure 3 As shown, the stop gasket 510, the stop ring 520 and the conversion head 530 are inserted into the conductor tube 400, and the three accessories are tightened; then the positions of the mounting holes on the stop ring 520 and the conversion head 530 are marked on the conductor tube 400 with a marking pen, thereby determining the screw hole processing position.

[0052] Further, see Figure 4As shown, the three accessories are removed from the conductor tube 400, and the points are marked with a point drill. A non-through screw hole is processed at the points of the conductor tube 400 with a hand drill, and the burrs on the edges of the screw hole are polished with a file. After the screw hole processing is completed, the stop washer 510, the stop ring 520 and the conversion head 530 are respectively put back on the conductor tube 400, and the mounting holes of the stop ring 520 and the conversion head 530 are aligned with the screw holes. The bolts are screwed into the screw holes to complete the installation of the first inner cone component 500. For details, see Figure 5 It should be noted that the tail of the bolt needs to be immersed in the outer surface of the conversion head 530.

[0053] Step 4: Install the second inner cone assembly 600 on the insulating layer 300;

[0054] In this embodiment, the second inner cone component 600 serves as the inner cone component of the adapter, corresponding to the portion on the insulating layer 300 and the outer shielding layer 200 , and includes a silicone cone sleeve.

[0055] In some embodiments, before installing the silicone cone sleeve, it is necessary to use a hot air gun or a heat shrink gun to heat the end of the tube mother at an appropriate temperature to remove moisture from the insulation layer 300, and then use an alcohol cloth to clean the dry insulation layer 300. After the insulation layer 300 is completely evaporated, evenly apply insulating silicone grease on the insulation layer 300; it should be noted that in order to make the temperature of the hot air gun or heat shrink gun appropriate, this embodiment adopts the method of placing a temperature sensor at the heating point to sense the heating temperature of the hot air gun or heat shrink gun.

[0056] Further, see Figure 7 As shown, after applying the insulating silicone grease, the silicone cone sleeve is first inserted into the insulating layer 300 and moved toward the end of the outer jacket layer 100, so that its large end wraps around the outer shielding layer 200. The silicone cone sleeve is then moved toward the end of the insulating layer 300, so that its small end wraps around the stop washer 510 of the first inner cone assembly 500. Finally, positioning clips are inserted into the two ends of the silicone cone sleeve to ensure the silicone cone sleeve is positioned after installation. It should be noted that a stress cone 610 is provided on the inner side of the silicone cone sleeve, corresponding to the outer shielding layer 200. When the large end of the silicone cone sleeve is wrapped around the outer shielding layer 200, the stress cone 610 of the silicone cone sleeve is in contact with the outer shielding layer 200.

[0057] Specifically, the stress cone 610 structure integrated inside the silicone cone sleeve effectively reduces the surface creepage effect by optimizing the electric field distribution at the end, and significantly improves the terminal's voltage resistance and anti-creeping performance.

[0058] Step 5: Install the third inner cone assembly 700 on the outer sheath layer 100;

[0059] In this embodiment, the third inner cone assembly 700 serves as the part of the adapter inner cone assembly corresponding to the outer jacket layer 100, and includes a terminal sleeve 710, a flange 720 and a dustproof sealing ring 730; wherein, the terminal sleeve 710 is installed on the outer jacket layer 100, the flange 720 and the dustproof sealing ring 730 are installed on the terminal sleeve 710, and the dustproof sealing ring 730 is installed on the side of the flange 720 close to the outer shielding layer 200.

[0060] In some embodiments, the third inner cone assembly 700 is installed on the outer jacket layer 100, specifically comprising: Figure 6 As shown, the terminal sleeve 710 is inserted into the outer sheath layer 100 , and then the flange 720 and the dustproof sealing ring 730 are sequentially inserted into the terminal sleeve 710 , and the flange 720 and the dustproof sealing ring 730 are pressed tightly.

[0061] Furthermore, the end of the terminal sleeve 710 is sealed, and one of heat shrink tubing, covering tape or cold shrink silicone can be used to achieve the installation and fixation of the terminal sleeve 710; in some embodiments, when using heat shrink tubing or cold shrink silicone, the heat shrink tubing or cold shrink silicone needs to be inserted into the tube mother before the third inner cone component 700 is inserted, and then the heat shrink tubing or cold shrink silicone is retracted after the third inner cone component 700 is inserted, and the heat shrink tubing or cold shrink silicone is wrapped on the terminal sleeve 710 and pressed tightly against the side of the flange 720 facing away from the outer shielding layer 200, and one end of the terminal sleeve 710 is fixed by heating the heat shrink tubing or cooling the cold shrink silicone; in another embodiment, when using a covering tape, the terminal sleeve 710 on the side of the flange 720 facing away from the outer shielding layer 200 can be sealed and fixed after the third inner cone component 700 is inserted.

[0062] Step 6: Installing the adapter socket 800;

[0063] In some embodiments, before installing the adapter socket 800, it is necessary to use an alcohol cloth to clean the inner wall of the adapter socket 800 or the outer wall of the silicone cone sleeve. After the inner wall of the adapter socket 800 or the outer wall of the silicone cone sleeve has evaporated, evenly apply insulating silicone grease on the inner wall of the adapter socket 800 or the outer wall of the silicone cone sleeve.

[0064] Further, see Figure 8 As shown, the female end of the pipe to be installed is inserted into the adapter socket 800; it should be noted that when inserting the female end of the pipe to be installed into the adapter socket 800, it is necessary to align it with the inner hole of the adapter socket 800 to avoid excessive swinging and damaging the inner wall of the adapter socket 800; then, a grounding wire and a heat shrink or cold shrink terminal sleeve 710 are installed between the adapter socket 800 and the flange 720, and the remaining ports are fixed in the same way as the ports fixed by the terminal sleeve 710.

[0065] Specifically, the above-mentioned process adopts a fully dry structural design as a whole, which fundamentally solves the problem of sealing the terminal top, eliminates the risk of SF6 gas leakage, and improves the safety of operation.

[0066] Furthermore, the adapter socket 800 is secured to the flange 720. In some embodiments, to ensure a uniform gap between the flange 720 and the adapter socket 800, the fixing bolts connecting the flange 720 and the adapter socket 800 are tightened with a torque of no more than 50 Nm during the securing process. Specifically, the high-precision mating design of the female end of the pipe and the adapter socket 800 significantly reduces the presence of air gaps and mitigates the risk of partial discharge caused by such gaps.

[0067] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A process for installing pluggable female pipe terminals of SF6 gas switch cabinet, characterized in that: The mother tube comprises, from the outside to the inside, an outer sheath layer (100), an outer shielding layer (200), an insulating layer (300) and a conductor tube (400), and includes the following steps: Obtaining the mother tube to be installed, the first inner cone assembly (500), the second inner cone assembly (600), the third inner cone assembly (700) and the adapter socket (800), and performing standardized inspections; The outer sheath layer (100) of the end of the female pipe to be installed is stripped, the end of the outer shielding layer (200) is measured upward from the end of the outer sheath layer (100), the remaining outer shielding layer (200) is stripped, and the measured end of the outer shielding layer (200) is surface treated, the end of the insulating layer (300) is measured upward from the end of the outer shielding layer (200), the remaining insulating layer (300) is stripped, and the measured end of the insulating layer (300) is surface treated; A first inner cone assembly (500) is installed on the conductor tube (400) at the end of the insulating layer (300), wherein the first inner cone assembly (500) comprises a stop washer (510), a stop ring (520) and a conversion head (530), wherein the stop washer (510) is arranged adjacent to the end of the insulating layer (300), the conversion head (530) is arranged at the end of the conductor tube (400), and the stop ring (520) is arranged between the stop washer (510) and the conversion head (530); Applying insulating silicone grease on the insulating layer (300), and installing the second inner cone assembly (600) on the insulating layer (300), wherein the second inner cone assembly (600) comprises a silicone cone sleeve, wherein the small end of the silicone cone sleeve is wrapped on the stop washer (510), and the large end of the silicone cone sleeve is attached to the outer shielding layer (200); A third inner cone assembly (700) is installed on the outer sheath layer (100), wherein the third inner cone assembly (700) comprises a terminal sleeve (710), a flange (720) and a dustproof sealing ring (730), wherein the terminal sleeve (710) is installed on the outer sheath layer (100), and the flange (720) and the dustproof sealing ring (730) are installed on the terminal sleeve (710); Insulating silicone grease is applied to the inner wall of the adapter socket (800) or the outer wall of the silicone cone sleeve, and the female end of the pipe to be installed is inserted into the adapter socket (800). Then, a grounding wire and a heat shrink or cold shrink terminal sleeve (710) are installed between the adapter socket (800) and the flange (720), and the adapter socket (800) and the flange (720) are fixed.

2. The installation process of the pluggable female pipe terminal of the SF6 gas switch cabinet according to claim 1 is characterized in that: Installing a first inner cone assembly (500) on the conductor tube (400) at the end of the insulating layer (300) specifically includes: The stop washer (510), the stop ring (520) and the conversion head (530) are inserted into the conductor tube (400), and screw hole processing positions are determined according to the mounting holes on the stop ring (520) and the conversion head (530); The stop gasket (510), the stop ring (520) and the conversion head (530) are removed from the conductor tube (400), a non-through screw hole is processed on the conductor tube (400) based on the screw hole processing position, and the first inner cone component (500) is installed through the non-through screw hole.

3. The installation process of the pluggable female pipe terminal of the SF6 gas switch cabinet according to claim 2, characterized in that: The step also includes: grinding the burrs on the pit edges of the non-through screw holes.

4. The installation process of the pluggable female pipe terminal of the SF6 gas switch cabinet according to claim 1, characterized in that: The step also includes processing chamfers for the pipe opening of the conductor pipe (400).

5. The installation process of the pluggable female pipe terminal of the SF6 gas switch cabinet according to claim 1, characterized in that: It is characterized in that The steps also include sealing the interior of the conductor tube (400).

6. The installation process of the pluggable female pipe terminal of the SF6 gas switch cabinet according to claim 1, characterized in that: Before installing the second inner cone assembly (600), the step further includes cleaning the insulating layer (300) with an alcohol cloth.

7. The installation process of the pluggable female pipe terminal of the SF6 gas switch cabinet according to claim 1, characterized in that: The terminal sleeve (710) is installed and fixed by using one of a heat shrink tube, a covering tape or a cold shrink silicone.

8. The installation process of the pluggable female pipe terminal of the SF6 gas switch cabinet according to claim 1, characterized in that: Before applying insulating silicone grease to the inner wall of the adapter socket (800) or the outer wall of the silicone cone sleeve, the step further includes cleaning the inner wall of the adapter socket (800) or the outer wall of the silicone cone sleeve with an alcohol cloth.

9. The installation process of the pluggable female pipe terminal of the SF6 gas switch cabinet according to claim 1, characterized in that: The measured length of the outer shielding layer (200) is 70 mm, the measured length of the insulating layer (300) is 150 mm, the exposed length of the conductor tube (400) is 85 mm, the outer diameter of the insulating layer (300) is 94±1 mm, and the outer diameter of the conductor tube (400) is 60 mm.

10. The installation process of the pluggable female pipe terminal of the SF6 gas switch cabinet according to claim 1, characterized in that: During the process of fixing the adapter socket (800) to the flange (720), a torque of no more than 50 Nm is used to push in the fixing bolts connecting the flange (720) and the adapter socket (800).

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