A sealing plug assembly for an indicator and an insulating sleeve assembly

Abstract

This invention relates to a sealing plug-in assembly for an indicator and an insulating sleeve assembly. The indicator sealing plug-in assembly of this invention has an insertion hole section for inserting an indicator lead terminal at its output terminal. The insertion hole section has a constriction structure. The indicator lead terminal includes a sealing insertion section, within which a conductive terminal is installed that makes conductive contact with the output terminal. The front end of the sealing insertion section has an elastically forced protruding structure. A sealing fit structure is located on the rear side of the elastically forced protruding structure on the sealing plug-in section. When the output terminal and the indicator lead terminal are inserted, the elastically forced protruding structure is forcibly inserted into the inner side of the constriction structure and prevents detachment with the inner edge of the constriction structure. The sealing fit structure seals with the inner circumferential surface of the constriction structure or the inner circumferential surface of the insertion hole of the insulating sleeve. This indicator sealing plug-in assembly of the present invention changes the traditional plug-in structure, achieving anti-detachment fixation and sealing in a single insertion, making it convenient to use.

Description

Technical Field

[0001] This invention relates to the field of gas-insulated switchgear technology, and more particularly to an indicator sealing plug assembly and an insulating sleeve assembly for metal-enclosed switchgear. Background Technology

[0002] In the medium-voltage field, C-GIS metal-enclosed switchgear is widely used in power system distribution and high-speed railway substation construction. The primary circuit of C-GIS metal-enclosed switchgear typically connects the inside and outside of the gas chamber via insulating bushing assemblies. Whether the primary circuit is energized is usually determined by a live indicator connected to the insulating bushing, thus providing safety assurance for operators. However, the connection points between the indicator lead terminals and the outgoing terminals are usually located in the cable compartment. Because the cable compartment is exposed to air with high humidity, the terminal connections can rust over time, causing the indicator lights to fail to illuminate. This results in the inability to accurately reflect whether the primary high-voltage side is energized, posing a safety hazard to the personnel operating and maintaining the equipment.

[0003] Chinese invention patent application CN110783848A discloses an improved insulating sleeve assembly addressing the aforementioned problems. While this assembly achieves a certain degree of sealing, practical application has revealed that the sealing effect between the front end of the rubber shell close to the indicator lead terminal and the bottom of the countersunk hole on the sleeve body is limited. Once condensation seeps between the rubber shell of the indicator lead terminal and the wall of the countersunk hole, it will eventually leak through the sealing joint, leading to seal failure. Furthermore, this insulating sleeve assembly requires the installation of a crimping fitting after the indicator lead terminal is inserted, increasing assembly steps and making it inconvenient to use. Summary of the Invention

[0004] The purpose of this invention is to provide an indicator sealing plug assembly to solve the problems of inconvenient connection and poor sealing effect of existing indicator sealing plug assemblies; at the same time, this invention also provides an insulating sleeve assembly to solve the problems of poor sealing effect and inconvenient assembly of existing insulating sleeve assemblies.

[0005] The indicator sealing connector assembly of the present invention includes an output terminal and an indicator lead terminal. The output terminal has a contact portion for conductive contact with a sensing ring and an insertion hole section for inserting the indicator lead terminal. The insertion hole section has a constriction structure. The indicator lead terminal includes a sealing insertion section, in which a conductive terminal that makes conductive contact with the output terminal is installed. The front end of the sealing insertion section has an elastically forced protruding structure. The sealing insertion section has a sealing fit structure on the rear side of the elastically forced protruding structure. When the output terminal and the indicator lead terminal are inserted, the elastically forced protruding structure is forcibly inserted into the inner side of the constriction structure and is prevented from detaching from the inner edge of the constriction structure. The sealing fit structure is sealed and fitted with the inner circumferential surface of the constriction structure and / or the inner circumferential surface of the insertion hole of the insulating sleeve.

[0006] The indicator sealing plug-in assembly of the present invention changes the traditional plug-in structure. Through the cooperation between the constricted structure of the plug-in hole section on the lead terminal and the sealing plug-in section on the indicator lead terminal, the sealing plug-in section can be forcibly inserted into the constricted structure. The elastic, outwardly protruding structure prevents detachment. Furthermore, the sealing fit structure achieves a sealing fit with the inner circumferential surface of the constricted structure and / or the inner circumferential surface of the insertion hole of the insulating sleeve, directly blocking condensation or other liquids outside the plug-in hole section, resulting in a better sealing effect. This indicator sealing plug-in assembly of the present invention achieves anti-detachment fixation and sealing in a single insertion, making it convenient to use.

[0007] Furthermore, the output terminal has a columnar structure, with the contact portion at one end and an insertion hole at the other end, which contains a stepped blind hole. The larger diameter section of the stepped blind hole is located inside the smaller diameter section, which forms the constriction structure. By using the stepped blind hole to form the constriction structure, the axial length of the inner circumferential surface of the resulting constriction structure can be made larger, thus ensuring a better sealing effect when combined with the sealing structure.

[0008] Furthermore, the elastic, rigid, convex structure is a frustum-shaped flange. This convex structure can prevent detachment around the circumference and along the inner edge of the closing structure, providing good anti-detachment effect, good overall integrity, and is not easily damaged during insertion, and is also easy to manufacture.

[0009] Furthermore, the sealing insert section includes a cylindrical rubber section, a frustum-shaped outer flange integrally formed with the end of the cylindrical rubber section. Using an integrally formed sealing insert section made of rubber material ensures smoother installation and a more reliable seal, relying on the elasticity of the rubber material itself.

[0010] Furthermore, the sealing structure is an elastic convex ring integrally formed on the outer circumference of the columnar rubber segment. This elastic convex ring, forming a structure similar to a sealing ring, not only ensures a seal but also makes the formation of the sealing structure relatively simple and convenient.

[0011] Furthermore, the conductive terminal and the output terminal make conductive contact through a post-hole insertion structure. The mating length of the blind hole and the post in the post-hole insertion structure ensures that when the post contacts the bottom of the blind hole, the elastic, rigid, protruding structure extends beyond the closing structure and fits tightly against the inner edge of the closing structure. Conductive contact is achieved through the post-hole insertion structure, with the conductive contact surfaces being both the inner and outer circumferential surfaces. This ensures reliable contact. Moreover, the length design of the blind hole and the post guarantees that after insertion, the elastic, rigid, protruding structure fits tightly against the inner edge of the closing structure, resulting in a stable and reliable overall insertion and a tight seal between the two components.

[0012] Furthermore, the conductive terminal and the output terminal make conductive contact through a post-hole insertion structure. One of the insertion posts and insertion holes in the post-hole insertion structure has evenly distributed arched spring pieces that arch radially towards the other, and these arched spring pieces make elastic contact with the other. The arched spring pieces achieve the insertion contact between the two, ensuring reliable contact. Simultaneously, the presence of a certain elastic force between them also provides a certain axial resistance, ensuring a tight insertion.

[0013] Furthermore, the plug post is disposed on the sealed insert section and extends forward, and the arched spring is disposed on the main body portion of the plug post extending out of the sealed insert section. Disposing the plug post on the sealed insert section facilitates cleaning of the plug post when the indicator lead terminal is pulled out, ensuring reliable electrical contact between the plug post and the blind insertion hole.

[0014] Furthermore, the main body of the extended sealing insert section of the plug is provided with an annular groove, and the two ends of the arched spring are respectively connected to the two sides of the groove edge. This structural form ensures the overall structural strength of the plug, making it less prone to damage and improving its service life.

[0015] The insulating sleeve assembly of the present invention includes an insulating sleeve and an indicator sealing plug assembly. The indicator sealing plug assembly includes an outgoing terminal and an indicator lead terminal. The outgoing terminal has a contact portion for conductive contact with a sensing ring and an insertion hole for inserting the indicator lead terminal. The insertion hole has a constriction structure. The indicator lead terminal includes a sealing insertion section, in which a conductive terminal that makes conductive contact with the outgoing terminal is installed. The front end of the sealing insertion section has an elastically forced protruding structure. The sealing insertion section has a sealing fit structure on the rear side of the elastically forced protruding structure. When the outgoing terminal and the indicator lead terminal are inserted, the elastically forced protruding structure is forcibly inserted into the inner side of the constriction structure and is prevented from detaching from the inner edge of the constriction structure. The outgoing terminal of the indicator sealing plug assembly is embedded in the insulating sleeve, and the opening of the insertion hole is exposed through the insertion hole or directly exposed for insertion of the indicator lead terminal. The sealing fit structure is sealed and fitted with the inner circumferential surface of the constriction structure and / or the inner circumferential surface of the insertion hole of the insulating sleeve.

[0016] The insulating sleeve assembly of the present invention improves the structure of the indicator sealing plug assembly. Through the cooperation between the tapered structure of the insertion hole section on the outgoing terminal and the sealing insertion section on the indicator lead terminal, the sealing insertion section can be forcibly inserted into the tapered structure. The elastic, outwardly protruding structure prevents detachment. Furthermore, the sealing fit structure achieves a sealing fit with the inner circumferential surface of the tapered structure and / or the inner circumferential surface of the insertion hole of the insulating sleeve, directly blocking condensation or other liquids outside the insertion hole section, resulting in a better sealing effect. The indicator sealing plug assembly of the insulating sleeve assembly of the present invention achieves anti-detachment fixation and sealing in a single insertion, making it convenient to use.

[0017] Furthermore, the output terminal has a columnar structure, with the contact portion at one end and an insertion hole at the other end, which contains a stepped blind hole. The larger diameter section of the stepped blind hole is located inside the smaller diameter section, which forms the constriction structure. By using the stepped blind hole to form the constriction structure, the axial length of the inner circumferential surface of the resulting constriction structure can be made larger, thus ensuring a better sealing effect when combined with the sealing structure.

[0018] Furthermore, the elastic, rigid, convex structure is a frustum-shaped flange. This convex structure can prevent detachment around the circumference and along the inner edge of the closing structure, providing good anti-detachment effect, good overall integrity, and is not easily damaged during insertion, and is also easy to manufacture.

[0019] Furthermore, the sealing insert section includes a cylindrical rubber section, a frustum-shaped outer flange integrally formed with the end of the cylindrical rubber section. Using an integrally formed sealing insert section made of rubber material ensures smoother installation and a more reliable seal, relying on the elasticity of the rubber material itself.

[0020] Furthermore, the sealing structure is an elastic convex ring integrally formed on the outer circumference of the columnar rubber segment. This elastic convex ring, forming a structure similar to a sealing ring, not only ensures a seal but also makes the formation of the sealing structure relatively simple and convenient.

[0021] Furthermore, the conductive terminal and the output terminal make conductive contact through a post-hole insertion structure. The mating length of the blind hole and the post in the post-hole insertion structure ensures that when the post contacts the bottom of the blind hole, the elastic, rigid, protruding structure extends beyond the closing structure and fits tightly against the inner edge of the closing structure. Conductive contact is achieved through the post-hole insertion structure, with the conductive contact surfaces being both the inner and outer circumferential surfaces. This ensures reliable contact. Moreover, the length design of the blind hole and the post guarantees that after insertion, the elastic, rigid, protruding structure fits tightly against the inner edge of the closing structure, resulting in a stable and reliable overall insertion and a tight seal between the two components.

[0022] Furthermore, the conductive terminal and the output terminal make conductive contact through a post-hole insertion structure. One of the insertion posts and insertion holes in the post-hole insertion structure has evenly distributed arched spring pieces that arch radially towards the other, and these arched spring pieces make elastic contact with the other. The arched spring pieces achieve the insertion contact between the two, ensuring reliable contact. Simultaneously, the presence of a certain elastic force between them also provides a certain axial resistance, ensuring a tight insertion.

[0023] Furthermore, the plug post is disposed on the sealed insert section and extends forward, and the arched spring is disposed on the main body portion of the plug post extending out of the sealed insert section. Disposing the plug post on the sealed insert section facilitates cleaning of the plug post when the indicator lead terminal is pulled out, ensuring reliable electrical contact between the plug post and the blind insertion hole.

[0024] Furthermore, the main body of the extended sealing insert section of the plug is provided with an annular groove, and the two ends of the arched spring are respectively connected to the two sides of the groove edge. This structural form ensures the overall structural strength of the plug, making it less prone to damage and improving its service life. Attached Figure Description

[0025] Figure 1 This is a perspective view of Embodiment 1 of the insulating sleeve assembly of the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the cross-section of the insulating bushing;

[0027] Figure 3 for Figure 2 The image shows an enlarged view of the wire terminals;

[0028] Figure 4 for Figure 1 A cross-sectional schematic diagram of the indicator plug;

[0029] Figure 5 for Figure 4 A three-dimensional view of the central lantern pillar.

[0030] In the diagram: 1. Insulating sleeve; 10. Conductor channel; 11. Fixed connection hole; 12. Sensing ring; 2. Outgoing terminal; 20. Indicator lead terminal; 21. Sealed plug section; 210. Frustum-shaped outer flange; 211. Elastic convex ring; 22. Plug post; 221. Ring groove; 220. Arched spring; 23. Plug blind hole; 24. Large diameter section; 241. Small diameter section; 240. Inner edge. Detailed Implementation

[0031] The insulating sleeve assembly of the present invention mainly improves the structure of the indicator sealing plug assembly configured thereon. Based on a brand-new plug-in mating structure, the mating structure of the plug hole section on the outgoing terminal and the sealing plug section on the indicator lead terminal can be used to forcefully insert the elastic strong-fitting protrusion structure at the front end of the sealing plug section into the closing structure. The elastic strong-fitting protrusion structure can prevent detachment. Moreover, the sealing mating structure located on the rear side of the elastic strong-fitting protrusion structure can achieve a sealing mating with the inner circumferential surface of the closing structure or the inner circumferential surface of the plug hole of the insulating sleeve. One-time insertion achieves anti-detachment fixation and sealing, which is convenient to use.

[0032] The features and performance of the present invention will be further described in detail below with reference to embodiments. The terms "front" and "back" are defined by the author only for the purpose of clearly distinguishing directions and do not refer to the front and back of the actual product.

[0033] Embodiment 1 of the insulating sleeve assembly of the present invention:

[0034] like Figure 1-5 As shown, in this embodiment, similar to existing insulating sleeve assemblies, it includes an insulating sleeve 1. The middle part of the insulating sleeve 1 has a conductor channel 10 for high-voltage conductors to pass through. The front end of the insulating sleeve 1 is used to extend into a sealed chamber filled with insulating gas, and the other end is fixedly connected to the cavity wall of the sealed chamber through a fixed connection hole 11. An induction ring 12 surrounding the conductor channel 10 is poured inside the insulating sleeve 1. An indicator sealing plug assembly is arranged at the rear end of the insulating sleeve 1. The indicator sealing plug assembly is used to transmit the electrical signal on the induction ring 12 to the external monitoring device.

[0035] Specifically, the key difference between this embodiment and existing insulating sleeve assemblies lies in the structure of the indicator sealing connector assembly. The indicator sealing connector assembly mainly includes an output terminal 2 and an indicator lead terminal 20. The output terminal 2 is integrally cast inside the insulating sleeve 1 during the casting process and is electrically connected to the sensing ring 12. The indicator lead terminal 20 is used to insert into the insulating sleeve 1 and is electrically connected to the output terminal 2.

[0036] like Figure 2-5 As shown, the output terminal 2 is cylindrical in shape. The output terminal 2 shown in the figure is a cylindrical shape with an outer diameter that is not uniform in the axial direction. Of course, in other embodiments, the output terminal 2 can also be a cylinder with a uniform outer diameter or a tapered shape with an outer diameter that gradually decreases from one end to the other. The specific design depends on the actual application. The front end of the output terminal 2 is the smallest diameter end, forming a contact end for contacting the sensing ring 12. The rear end of the output terminal 2, with a larger diameter, has an insertion hole section for connecting with the indicator lead terminal 20. From... Figure 2As can be seen, the rear end of the large diameter section of the outgoing terminal 2 is provided with a stepped blind hole. The large diameter section 24 of the stepped blind hole is located inside the small diameter section 241. The small diameter section 241 forms a constricted structure. The length of the large diameter section 24 and the length of the small diameter section 241 are approximately equal.

[0037] When the outgoing terminal 2 is cast into the insulating sleeve 1, it is located inside the rear end face of the insulating sleeve 1. The rear end face of the insulating sleeve 1 has a pre-reserved insertion hole at the position corresponding to the small diameter section 241 orifice. The size of the insertion hole is equal to the size of the small diameter section 241 orifice. The indicator lead terminal 20 is inserted into the outgoing terminal 2 through the insertion hole.

[0038] The specific structure of indicator lead terminal 20 is as follows: Figure 4-5 As shown, the whole is L-shaped. The part of the L-shaped lead terminal on one side of the corner is a sealed insertion section, which is used to insert into the output terminal 2. The part on the other side is the lead wire part. The indicator lead terminal 20 can be made of rubber casting, and the lead wire is cast inside (not shown in the figure). The sealed insertion section is cast with conductive terminals, which are used to make electrical contact with the output terminal 2. The lead wire is electrically connected to the conductive terminals.

[0039] The sealing insert section is a cylindrical structure adapted to the insertion hole. Its front end features a frustum-shaped outer flange 210, forming an elastic, forced-fitting outer convex structure. The outer diameter of the frustum-shaped outer flange 210 is larger than the size of the insertion hole. Because it is made of rubber, relying on its own elastic deformation capability, the sealing insert section can forcibly insert into the insertion hole and the small-diameter section 241 of the insertion blind hole 23, and enter the large-diameter section 24 of the insertion blind hole 23. At this time, the frustum-shaped outer flange 210 returns to its original deformation, and... The sealing insert section has two elastic protruding rings 211 formed on the rear side of the frustum-shaped outer flange 210, and the portion with the elastic protruding rings 211 forms a sealing fit section. After the sealing insert section is inserted into the outlet terminal 2, the two elastic protruding rings 211 can respectively seal and fit with the inner circumferential surface of the small diameter section 241 of the insertion blind hole 23 and the inner circumferential surface of the insertion hole, thereby ensuring a reliable seal. In this way, the sealing insert section and the insertion blind hole 23 on the outlet terminal 2 together achieve a reliable seal and prevent the indicator lead terminal 20 and the outlet terminal 2 from disengaging. Moreover, this insert fit structure can be directly inserted without any other operation, making it convenient to use.

[0040] For the electrical connection between the output terminal 2 and the indicator lead terminal 20, a post-hole plug-in structure is preferably adopted. Conductive contact is achieved through this structure, with the conductive contact surfaces being both the inner and outer circumferential surfaces, resulting in more reliable contact. Furthermore, in this embodiment, more preferably, the mating length of the blind hole 23 and the plug-in post 22 in the post-hole plug-in structure is such that when the plug-in post 22 contacts the bottom of the blind hole 23, the elastic, rigid, protruding structure extends beyond the closing structure and fits tightly against the inner edge 240 of the closing structure. This design of the lengths of the blind hole 23 and the plug-in post 22 ensures that after insertion, the elastic, rigid, protruding structure fits tightly against the inner edge 240 of the closing structure, resulting in a more stable and reliable overall insertion and a tight seal between the two.

[0041] Specifically, in this embodiment, such as Figure 3-4 As shown, the plug-in post 22 is set on the sealed plug section and extends forward, so the inside of the output terminal 2 is a recessed hole structure, and the front end of the indicator lead terminal 20 is a protruding structure, which makes the manufacturing of both relatively convenient.

[0042] More preferably, the insertion post 22 of the hole-and-post connector structure and one of the insertion holes can be provided with evenly distributed arched spring pieces 220 that arch radially upwards towards the other on the circumferential surface. The arched spring pieces 220 make elastic contact with the other to ensure reliable electrical contact between the two. Moreover, in this embodiment, the arched spring pieces 220 are located entirely on the outer front end of the sealed insertion section, and the evenly distributed arched spring pieces 220 are exposed in the circumferential direction. This makes it easy to clean when debris gets stuck between the arched spring pieces 220. When the elasticity of the arched spring pieces 220 fails or is damaged, the indicator lead terminal 20 can be directly replaced, which is cost-effective.

[0043] Since the plug post 22 protrudes from the front end of the sealing insert section, in order to prevent it from bending or being damaged when subjected to external force or inaccurate insertion, in this embodiment, it is preferable to provide an annular groove 221 on the protruding part of the plug post 22 in the sealing insert section, and the two ends of the arched spring piece 220 are connected to the two sides of the groove edge of the annular groove 221. This ensures that the plug post 22 has a continuous column part in the length direction, and the structural strength is high.

[0044] The present invention is not limited to the embodiments described above. Based on the design concept of the present invention, other modified embodiments are provided below.

[0045] For example, in other embodiments, unlike Embodiment 1 described above, in order to reduce the resistance when the indicator lead terminal is inserted into the output terminal, the elastic forced protrusion structure can be an elastic barb structure that is evenly spaced in the circumferential direction at the front end of the sealed insertion section.

[0046] For example, in other embodiments, unlike Embodiment 1 described above, the sealing mating section of the sealing insert section located on the rear side of the elastically reinforced convex structure is a smooth cylindrical section, and a sealing ring is installed on the inner circumferential surface of the closing structure and / or the inner circumferential surface of the insertion hole, and the sealing is achieved by the outer circumferential surface of the smooth cylindrical section cooperating with the sealing ring.

[0047] For example, in other embodiments, unlike Embodiment 1 described above, the sealing fitting section of the sealing insert section located behind the elastically reinforced convex structure only seals with the inner circumferential surface of the closing structure. For example, when the distance between the rear side of the closing structure and the rear end face of the insulating sleeve is small or directly flush with the rear end face of the insulating sleeve, or when the sealing fitting section only seals with the inner circumferential surface of the insertion hole, for example, when the closing structure is an inward flange provided at the opening of the insertion blind hole.

[0048] For example, in other embodiments, unlike Embodiment 1 described above, the electrical contact between the output terminal and the indicator lead terminal is achieved by surface-to-surface contact. For instance, the output terminal has a rearward protruding contact end face at the bottom of the insertion blind hole, and the front end face of the sealed insertion section has a resilient contact end. When the indicator lead terminal is inserted into the tail throat, the resilient contact end presses against the contact end face, thereby achieving electrical contact between the output terminal and the indicator lead terminal.

[0049] For example, in other embodiments, unlike Embodiment 1 described above, the conductive terminals and the output terminals achieve conductive contact through a common post-hole connection structure, such as the post-hole connection of a traditional headphone plug and a headphone jack on a mobile phone. This post-hole connection structure is relatively simple and has low manufacturing cost.

[0050] For example, in other embodiments, unlike Embodiment 1 described above, the positions of the plug hole and the plug post can be interchanged, that is, the plug hole is located inside the indicator lead terminal, and the plug post is located on the output terminal.

[0051] The specific structure of the indicator sealing plug assembly of the present invention is the same as that of the indicator sealing plug assembly in the embodiment of the insulating sleeve assembly described above, and will not be repeated here.

[0052] 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 sealed connector assembly for an indicator, comprising an output terminal (2) and an indicator lead terminal (20), characterized in that, The output terminal (2) has a contact portion for conductive contact with the sensing ring (12) and an insertion hole section for inserting the indicator lead terminal (20). The insertion hole section is a stepped blind hole with the large diameter section inside and the small diameter section outside. The small diameter section forms a tapered structure. The indicator lead terminal (20) includes a sealed insertion section, which includes a columnar rubber section. A conductive terminal that makes conductive contact with the output terminal (2) is installed inside the sealed insertion section. The front end of the sealed insertion section has an integral... The elastic forced protrusion structure is formed by the shaped frustum-shaped outer flange. The sealing plug section (21) has an elastic protrusion ring integrally formed on the outer circumferential surface of the columnar rubber section on the rear side of the elastic forced protrusion structure. When the output terminal (2) and the indicator lead terminal (20) are inserted, the elastic forced protrusion structure is forcibly inserted into the inner side of the closing structure and is prevented from falling off by the inner edge (240) of the closing structure. The elastic protrusion ring is sealed and matched with the inner circumferential surface of the closing structure and / or the inner circumferential surface of the insertion hole of the insulating sleeve (1).

2. The indicator sealing connector assembly according to claim 1, characterized in that, The output terminal (2) is a columnar structure. One end of the columnar structure is provided with the contact part, and the other end forms an insertion hole section with the stepped blind hole inside.

3. The indicator sealing connector assembly according to claim 2, characterized in that, The conductive terminal and the output terminal (2) make conductive contact through the hole-post plug-in structure. The matching length of the plug-in blind hole (23) and the plug-in post (22) of the hole-post plug-in structure is such that when the plug-in post (22) contacts the bottom of the hole of the plug-in blind hole (23), the elastic strong protruding structure passes over the closing structure and is close to the inner edge (240) of the closing structure.

4. The indicator sealing connector assembly according to claim 2, characterized in that, The conductive terminal and the output terminal (2) make conductive contact through the hole-post plug-in structure. The plug-in post (22) and one of the plug holes of the hole-post plug-in structure are uniformly provided with an arched spring piece (220) that arches radially toward the other, and make elastic contact with the other through the arched spring piece.

5. The indicator sealing connector assembly according to claim 4, characterized in that, The plug post (22) is disposed on the sealing insert section and extends forward, and the arched spring piece (220) is disposed on the main body of the plug post (22) extending out of the sealing insert section.

6. The indicator sealing connector assembly according to claim 5, characterized in that, The main body of the extended sealing insert section of the plug (22) is provided with an annular groove (221), and the two ends of the arched spring piece (220) are respectively connected to the two sides of the groove edge of the annular groove (221).

7. An insulating sleeve assembly, comprising an insulating sleeve (1) and an indicator sealing connector assembly, characterized in that, The indicator sealing connector assembly includes an output terminal (2) and an indicator lead terminal (20). The output terminal (2) has a contact portion for conductive contact with the sensing ring (12) and an insertion hole section for inserting the indicator lead terminal (20). The insertion hole section is a stepped blind hole with the large diameter section inside and the small diameter section outside. The small diameter section forms a tapered structure. The indicator lead terminal (20) includes a sealing insertion section, which includes a columnar rubber section. A conductive terminal that makes conductive contact with the output terminal (2) is installed inside the sealing insertion section. The front end of the sealing insertion section has an elastically reinforced outward protrusion formed by an integrally formed frustum-shaped outward flange. The structure has an elastic protruding ring integrally formed on the outer circumference of the columnar rubber section on the rear side of the elastic forced protruding structure. When the output terminal (2) and the indicator lead terminal (20) are inserted, the elastic forced protruding structure is forcibly inserted into the inner side of the closing structure and is blocked by the inner edge (240) of the closing structure. The elastic protruding ring is sealed and matched with the inner circumference of the closing structure and / or the inner circumference of the insertion hole of the insulating sleeve (1). The output terminal (2) of the indicator sealing plug assembly is embedded in the insulating sleeve (1), and the opening of the insertion hole section is exposed through the insertion hole or directly exposed for the insertion of the indicator lead terminal (20).

8. The insulating sleeve assembly according to claim 7, characterized in that, The output terminal (2) is a columnar structure. One end of the columnar structure is provided with the contact part, and the other end forms an insertion hole section with the stepped blind hole inside.

9. The insulating sleeve assembly according to claim 8, characterized in that, The conductive terminal and the output terminal (2) make conductive contact through the hole-post plug-in structure. The matching length of the plug-in blind hole (23) and the plug-in post (22) of the hole-post plug-in structure is such that when the plug-in post (22) contacts the bottom of the hole of the plug-in blind hole (23), the elastic strong protruding structure passes over the closing structure and is close to the inner edge (240) of the closing structure.

10. The insulating sleeve assembly according to claim 8, characterized in that, The conductive terminal and the output terminal (2) make conductive contact through the hole-post plug-in structure. The plug-in post (22) and one of the plug holes of the hole-post plug-in structure are uniformly provided with an arched spring piece (220) that arches radially toward the other, and make elastic contact with the other through the arched spring piece.

11. The insulating sleeve assembly according to claim 10, characterized in that, The plug post (22) is disposed on the sealing insert section and extends forward, and the arched spring piece (220) is disposed on the main body of the plug post (22) extending out of the sealing insert section.

12. The insulating sleeve assembly according to claim 11, characterized in that, The main body of the extended sealing insert section of the plug (22) is provided with an annular groove (221), and the two ends of the arched spring piece (220) are respectively connected to the two sides of the groove edge of the annular groove (221).

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