Anti-falling buckle of sealing ring

Abstract

The utility model discloses a buckle for preventing a sealing ring from falling off. The buckle is used for preventing a first sealing ring from being separated from an oil-filled terminal. The oil-filled terminal comprises a top cover, and a sealing groove used for containing the first sealing ring is formed in the lower end face of the top cover. The buckle comprises a lower plate, the lower plate abuts against the lower end face of the top cover, part of the sealing groove is covered, and the first sealing ring is limited in the sealing groove. And leakage and deterioration of the insulating oil caused by separation or displacement of the first sealing ring in the assembly process are prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable terminal installation auxiliary field, concretely relates to a sealing ring anti -drop buckle. BACKGROUND

[0002] In high voltage and superhigh voltage power grid construction, cable outdoor terminal is the key component connecting underground cable and high voltage overhead transmission line. At present, oil-filled terminal is widely used and attracts much attention. The existing oil-filled terminal usually uses sealing glue to bond and fix sealing ring during assembly, and the sealing ring often falls off due to poor bonding effect, which has certain limitations. In the installation process, the displacement or out of sealing groove of the "O" type sealing ring may cause damage to the sealing ring, which cannot guarantee complete sealing, and further cause oil leakage at the joint surface of each assembly, and there is also the risk of deterioration of insulating oil caused by the absence of sealing ring. SUMMARY

[0003] The utility model discloses a sealing ring anti -drop buckle, which can limit and fix the sealing ring during the assembly of the oil-filled terminal, effectively prevent oil leakage and deterioration of insulating oil caused by displacement or separation of the sealing ring.

[0004] The utility model provides a sealing ring anti -drop buckle, the buckle is used for preventing the first sealing ring from separating from the oil-filled terminal;

[0005] The oil-filled terminal comprises a top cover, and a sealing groove for accommodating the first sealing ring is formed in the lower end surface of the top cover;

[0006] The buckle comprises a lower plate, the lower plate is in abutment with the lower end surface of the top cover, the length of the end surface of the lower plate in contact with the top cover is greater than the distance between the sealing groove and the side wall of the top cover, and the lower plate covers part of the sealing groove, limiting the first sealing ring in the sealing groove.

[0007] In an embodiment, the top cover is inserted with a plurality of buckles in the circumferential direction.

[0008] In an embodiment, the buckle is a U-shaped structure, comprising an upper plate arranged in parallel with the lower plate, and a side plate arranged perpendicularly with the lower plate, and the upper plate is in abutment with the upper end surface of the top cover.

[0009] In an embodiment, the distance between the upper plate and the lower plate is matched with the thickness of the top cover.

[0010] In an embodiment, the oil-filled terminal further has a terminal body, the terminal body is connected with the top cover, and the terminal body and the top cover have an installation gap therebetween, and the thickness of the lower plate is matched with the installation gap.

[0011] In an embodiment, a plurality of through holes for penetrating fasteners are provided on the top cover.

[0012] In an embodiment, the buckle is covered with a heat shrink tube.

[0013] The sealing ring anti-dropping buckle of the technical scheme of the utility model, the buckle is used for preventing the first sealing ring from separating from the oil-filled terminal. The oil-filled terminal comprises a top cover, and a sealing groove for accommodating the first sealing ring is arranged on the lower end surface of the top cover. The buckle comprises a lower plate, the lower plate is in abutment with the lower end surface of the top cover, covers part of the sealing groove, and limits the first sealing ring in the sealing groove. The first sealing ring is prevented from separating or shifting during assembly, thereby causing the insulating oil to leak and deteriorate. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0015] Figure 1 is the oil-filled terminal front view sectional view of the sealing ring anti-dropping buckle of an embodiment of the utility model;

[0016] Figure 2 is the top cover plan view of the sealing ring anti-dropping buckle of an embodiment of the utility model;

[0017] Figure 3 is the according to the sealing ring anti-dropping buckle of an embodiment of the utility model; Figure 2 the sectional view along the section A-A;

[0018] Figure 4 is the buckle front view of the sealing ring anti-dropping buckle of an embodiment of the utility model;

[0019] Figure 5 is the buckle plan view of the sealing ring anti-dropping buckle of an embodiment of the utility model.

[0020] EXPLANATION OF DRAWINGS:

[0021] Reference Name Reference Name Reference Name 1 Buckle 13 Side plate 3 First sealing ring 1a Clamping cavity 2 Top cover 4 Terminal body 11 Lower plate 2a Sealing groove 5 Wire fitting 12 Upper plate 2b Through hole 6 Second sealing ring

[0022] The realization, functional features and advantages of the utility model will be further explained by combining with embodiments and referring to the drawings. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present application.

[0024] It should be noted that all directional indications, such as upper, lower, left, right, front, back, and the like, used in the embodiments of the present application are only used to explain the relative position relationship, movement condition, and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0025] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing", and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0026] In addition, in the present application, the description such as "first", "second", and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0027] With the rapid development of China's power construction and the continuous growth of power demand, the construction of high-voltage and extra-high-voltage power grid is particularly important. In this environment, the demand for cross-linked polyethylene insulation power cables of 66kV and above voltage levels is increasing, which also promotes the rapid development of cable accessories. The cable outdoor terminal is the main part, through which the underground cable and the high-voltage overhead line on the high-voltage transmission tower can be reliably connected. At present, the cable terminal product mainly includes full-dry prefabricated silicone rubber outdoor terminal and oil-filled terminal, among which the oil-filled terminal is the most widely used. The existing oil-filled terminal uses ordinary "O" type sealing ring for sealing at the joint surface of each component. This sealing method cannot ensure that the "O" type sealing ring does not displace or fall out of the sealing groove during installation, causing damage to the sealing ring, so as to ensure complete sealing. The joint surface of each assembly body is prone to oil leakage and insulation oil deterioration risk caused by missing sealing ring.

[0028] The utility model provides a sealing ring anti -drop buckle. Please refer to Figures 1 to 5 , including buckle 1, buckle 1 is used to prevent the first sealing ring 3 from separating from oil-filled terminal;Oil-filled terminal includes top cover 2, the lower end surface of top cover 2 is provided with sealing groove 2a for accommodating first sealing ring 3;Buckle 1 includes lower plate 11, lower plate 11 and top cover 2 lower end surface abut, the length of the end surface of lower plate 11 and top cover 2 contact is greater than the distance between sealing groove 2a and the side wall of top cover 2, and lower plate 11 covers part of sealing groove 2a, and first sealing ring 3 is limited in sealing groove 2a.

[0029] In the embodiment, the oil-filled terminal needs to be provided with a first sealing ring 3 during assembly, and the first sealing ring 3 is an O-shaped sealing ring. The oil-filled terminal includes a top cover 2, and an annular sealing groove 2a is formed in the lower end surface of the top cover 2, and the first sealing ring 3 is accommodated in the sealing groove 2a. The sealing groove 2a is matched with the first sealing ring 3. During assembly, the first sealing ring 3 is easy to fall off from the sealing groove 2a, causing damage to the sealing ring and leading to installation error of the oil-filled terminal. Therefore, the buckle 1 is provided, the buckle 1 includes the lower plate 11, the buckle 1 is inserted from the side wall of the top cover 2 to the center direction, and the lower plate 11 and the lower end surface of the top cover 2 are mutually attached and abutted. It can be understood that the length of the end surface of the lower plate 11 and the top cover 2 contacted along the insertion direction of the buckle 1 is greater than the distance between the sealing groove 2a and the side wall of the top cover 2, so that the lower plate 11 covers part of the slot of the sealing groove 2a, the lower plate 11 and the covered part of the sealing groove 2a form a closed port, and the first sealing ring 3 is limited in the sealing groove 2a.

[0030] Further, please refer to Figure 1 、 Figure 2 and Figure 3 , the top cover 2 is inserted with a plurality of buckles 1 along the circumference.

[0031] Specifically, the plurality of buckles 1 are arranged along the circumference of the top cover 2 and are inserted into the top cover 2 along the side wall of the top cover 2 in a central direction, so that the plurality of lower plates 11 and the sealing groove 2a form a plurality of closed openings, thereby providing support and limiting for the first sealing ring 3 and preventing displacement or disengagement of the first sealing ring 3 when the top cover 2 moves or is flipped. Preferably, 3 to 4 buckles are provided for each oil-filled terminal, and the plurality of buckles are uniformly distributed along the circumference of the top cover 2.

[0032] Further, please refer to Figure 4 and Figure 5 , the buckle 1 is in a U-shaped structure, including an upper plate 12 arranged in parallel with the lower plate 11 and a side plate 13 arranged perpendicularly to the lower plate 11, and the upper plate 11 abuts against the upper end surface of the top cover 2.

[0033] In this embodiment, the upper plate 12, the lower plate 11 and the side plate 13 of the buckle 1 form a U-shaped structure and constitute a clamping cavity 1a, and when the buckle 1 is inserted into the top cover 2, the part of the top cover 2 close to the side wall is inserted into the clamping cavity 1a, so that the buckle 1 is installed on the top cover 2, and the buckle 1 will not disengage from the top cover 2 when the top cover 2 moves or is flipped, thereby ensuring that the limiting of the buckle 1 on the first sealing ring 3 is more firm. The upper plate 12 is parallel to the lower plate 11. Preferably, the length of the upper plate 12 is less than the length of the lower plate 11, the upper plate 12 is a short plate, and the lower plate 11 is a long plate, which provides positioning for the installation of the buckle 1 and the top cover 2, so that the assembly process is more convenient and fast. The side plate 13 is perpendicular to the lower plate 11, and when the buckle 1 is inserted into the top cover 2, the side plate 13 contacts the side wall of the top cover 2. Preferably, the shape of the side plate 13 matches the shape of the side wall of the top cover 2, and the side plate 13 is in close contact with the side wall of the top cover 2, thereby increasing the contact area and making the installation of the buckle 1 more stable.

[0034] Further, please refer to Figure 1 and Figure 3 , the distance between the upper plate 12 and the lower plate 11 is adapted to the thickness of the top cover 2.

[0035] Specifically, the distance between the upper plate 12 and the lower plate 11 is adapted to the thickness of the top cover 2, the clamping cavity 1a can be accurately clamped with the top cover 2, the installation stability of the buckle 1 is improved, the wear caused by size mismatch is reduced, and the durability and service life of the overall structure are improved.

[0036] An embodiment is provided in the utility model, please refer to Figure 1 , the oil-filled terminal further has a terminal body 4, the terminal body 4 is connected with the top cover 2, and the terminal body 4 and the top cover 2 have an installation gap therebetween, and the thickness of the lower plate 11 is adapted to the installation gap.

[0037] Specifically, the oil-filled terminal has a terminal body 4, the terminal body 4 is provided with a first insertion hole for accommodating an outgoing fitting 5 along an axial direction, the top cover 2 has a second insertion hole communicated with the first insertion hole, the outgoing fitting 5 passes through the second insertion hole, the top cover 2 is provided with an annular groove near an upper end face of the top cover 2, a second sealing ring 6 is arranged in the annular groove, and the sealing between the top cover 2 and the outgoing fitting 5 is realized through the second sealing ring 6. The first sealing ring 3 is arranged between the top cover 2 and the terminal body 4, and the sealing between the top cover 2 and the terminal body 4 is realized through the first sealing ring 3. The terminal body 4 and the top cover 2 have an installation gap, the lower plate 11 is inserted into the installation gap, the thickness of the lower plate 11 is matched with the installation gap, and it can be understood that different specifications of the oil-filled terminal product have different installation gap requirements. When the oil-filled terminal product of 110KV is configured, the thickness of the lower plate 11 is set to 1mm, and when the oil-filled terminal product of 220KV or above is configured, the thickness of the lower plate 11 can be increased according to the corresponding voltage level to meet the assembly requirements.

[0038] Further, please refer to Figure 1 and Figure 3 , the top cover 2 is provided with a plurality of through holes 2b for passing fasteners.

[0039] Specifically, in the installation process of the oil-filled terminal, first, the first sealing ring 3 is placed in the sealing groove 2a, then the buckle 1 is inserted with the top cover 2, the lower plate 11 is pushed from the side wall of the top cover 2 to the center direction until it covers the sealing groove 2a along the pushing direction, the side plate 13 abuts against the side wall of the top cover 2, and the upper plate 12 abuts against the upper end face of the top cover 2, so that the buckle 1 is stably installed, the first sealing ring 3 is stably limited in the sealing groove 2a, and displacement or separation of the first sealing ring 3 is prevented. After the top cover 2 and the terminal body 4 are pre-pressed, the buckle 1 is separated, and at this time, the first sealing ring 3 will not be separated. The top cover 2 is provided with a plurality of through holes 2b, and fasteners are arranged in the through holes 2b to fix and assemble the top cover 2 and the terminal body 4, so that the top cover 2 and the terminal body 4 meet the sealing requirements.

[0040] Further, please refer to Figures 1 to 5 , the buckle 1 is covered with a heat shrink tube.

[0041] Specifically, the buckle 1 is entirely covered with a heat shrink tube, which prevents the buckle 1 from scratching and wearing the top cover 2, the first sealing ring 3 and the terminal body 4 during assembly, and improves the durability and service life of the buckle 1.

[0042] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application without departing from the principles and spirit of the present application.

Claims

1. A seal ring anti -drop-off buckle, characterized in that: The buckle (1) is used for preventing the first sealing ring (3) from being separated from the oil-filled terminal; The oil-filled terminal comprises a top cover (2), and a sealing groove (2a) for accommodating the first sealing ring (3) is formed in the lower end surface of the top cover (2); The buckle (1) comprises a lower plate (11) which is in abutment with the lower end surface of the top cover (2), and the length of the end surface of the lower plate (11) in contact with the top cover (2) is greater than the distance between the sealing groove (2a) and the side wall of the top cover (2), and the lower plate (11) covers part of the sealing groove (2a) and limits the first sealing ring (3) in the sealing groove (2a).

2. The seal anti-extraction buckle of claim 1, wherein, The top cover (2) is inserted with a plurality of buckles (1) in the circumferential direction.

3. The seal anti-extraction clip of claim 1, wherein: The buckle (1) is in U-shaped structure, comprising an upper plate (12) arranged in parallel with the lower plate (11), and a side plate (13) arranged perpendicularly to the lower plate (11), and the upper plate (12) is in abutment with the upper end surface of the top cover (2).

4. The seal anti-extraction buckle of claim 3, wherein, The distance between the upper plate (12) and the lower plate (11) is matched with the thickness of the top cover (2).

5. The seal anti-extraction clip of claim 1, wherein, The oil-filled terminal further comprises a terminal body (4) connected with the top cover (2), and the terminal body (4) and the top cover (2) have an installation gap therebetween, and the thickness of the lower plate (11) is matched with the installation gap.

6. The seal anti-extraction clip of claim 1, wherein, A plurality of through holes (2b) for penetrating fasteners are arranged on the top cover (2).

7. The seal anti-extraction clip of claim 1, wherein, The buckle (1) is covered with a heat shrink tube.

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