CN218351219U

CN218351219U - Sealing structure and lightning arrester

Info

Publication number: CN218351219U
Application number: CN202222513712.6U
Authority: CN
Inventors: 乐三祥; 郭永诚; 李欣欣; 吕芸芸; 丁磊磊; 印弘扬; 汤亚南; 姜琳玲; 曹佳雯
Original assignee: Jiangdong Fittings Equipment Co Ltd
Current assignee: Jiangdong Fittings Equipment Co Ltd
Priority date: 2022-09-22
Filing date: 2022-09-22
Publication date: 2023-01-20
Anticipated expiration: 2032-09-22

Abstract

The utility model provides a seal structure and arrester. This seal structure includes: the mounting seat is provided with an inner cavity; the end cover is arranged on the mounting seat and can seal the inner cavity, the end cover comprises a mounting cavity and an exhaust hole, one end of the exhaust hole is communicated with the inner cavity, the other end of the exhaust hole is communicated with the mounting cavity, and the exhaust hole is communicated with the atmosphere through the mounting cavity; and the sealing element is arranged in the mounting cavity and can seal the exhaust hole. The technical scheme of the utility model seal structure can solve current seal structure, sealed glue can not fill the clearance completely, leads to sealed not tight problem.

Description

Sealing structure and lightning arrester

Technical Field

The utility model relates to a sealed technical field particularly, relates to a seal structure and arrester.

Background

The zinc oxide arrester is the most excellent overvoltage protection electric appliance recognized at present and is the basis of insulation matching of a power system. The method is mainly used for protecting a power system, an electrified railway system and a communication system from damage caused by atmospheric overvoltage, operation overvoltage, transient power frequency overvoltage and the like. The reason for counting the explosion of the lightning arrester is 70% of the reason caused by the unqualified sealing manufactured by the lightning arrester.

The existing design is that an exhaust groove is formed in the side face of a thread of an upper end cover, a proper amount of sealant is coated on the exhaust groove and the thread before the upper end cover is assembled, a gap between the thread and the exhaust groove is filled, sealing is formed after complete curing within about 4 hours, however, actual assembly is generally completed within 10 minutes, the sealant is not cured safely, the sealant which is not cured completely flows after being transported and inverted repeatedly in a product test process, the gap cannot be filled fully by the sealant, and therefore the product is not sealed tightly.

SUMMERY OF THE UTILITY MODEL

A primary object of the utility model is to provide a seal structure and arrester can solve current seal structure, and sealed glue can not fill the clearance completely, leads to sealed not tight problem.

In order to achieve the above object, according to an aspect of the present invention, there is provided a sealing structure including: the mounting seat is provided with an inner cavity; the upper end cover is arranged on the mounting seat and can seal the inner cavity, the upper end cover comprises a mounting cavity and an exhaust hole, one end of the exhaust hole is communicated with the inner cavity, the other end of the exhaust hole is communicated with the mounting cavity, and the exhaust hole is communicated with the atmosphere through the mounting cavity; and the sealing element is arranged in the mounting cavity and can seal the exhaust hole.

Further, seal structure still compresses tightly the piece, compresses tightly the piece and installs in the installation cavity, compresses tightly the one side that the piece is located the sealing member and keeps away from the exhaust hole, compresses tightly the piece and can compress tightly the sealing member to the terminal surface that makes the terminal surface of sealing member and exhaust hole place laminates mutually.

Furthermore, the inner wall of the installation cavity is provided with threads, and the pressing piece is in threaded connection with the installation cavity.

Further, the installation cavity comprises a first installation cavity and a second installation cavity, the first installation cavity is communicated with the second installation cavity, the second installation cavity is located on one side, away from the exhaust hole, of the first installation cavity, and the sealing element is installed in the first installation cavity.

Further, the outer wall of the sealing element is tightly attached to the inner wall of the first mounting cavity; and/or the central axis of the exhaust hole is a first axis, the central axis of the first mounting cavity is a second axis, the central axis of the second mounting cavity is a third axis, and the first axis, the second axis and the third axis are collinear.

Furthermore, the pressing piece comprises a first pressing piece and a second pressing piece, the first pressing piece is installed in the first installation cavity, the second pressing piece is installed in the second installation cavity, the first pressing piece is located on one side, away from the exhaust hole, of the sealing piece, one end of the first pressing piece is abutted to the sealing piece, and the other end of the first pressing piece is abutted to the second pressing piece.

Furthermore, a gap exists between the first pressing piece and the inner wall of the first installation cavity, and sealant is filled in the gap; and/or a gap exists between the second pressing piece and the inner wall of the second installation cavity, and the gap is filled with sealant.

Furthermore, the first piece that compresses tightly is the cylinder, and the second compresses tightly the piece for the bolt, and the inner wall of second installation cavity is provided with the screw thread, and the second compresses tightly the piece and can compress tightly first piece that compresses tightly.

Furthermore, one end of the second pressing piece is located in the second mounting cavity, and the other end of the second pressing piece is located outside the upper end cover.

According to the utility model discloses an on the other hand provides a lightning arrester, including conductive band, resistance card and foretell seal structure.

Use the technical scheme of the utility model, be provided with exhaust hole and installation cavity on the upper end cover of mount pad, the one end in exhaust hole is linked together with the inner chamber of mount pad, and the other end in exhaust hole is linked together with the installation cavity, and the gaseous accessible exhaust hole in the inner chamber is discharged, makes things convenient for the assembly of upper end cover. The sealing member is installed in the installation cavity, and the sealing member can seal the exhaust hole to there is not the clearance between sealing member and the exhaust hole, and is sealed tight, and the setting of sealing member can further seal the inner chamber, prevents that the moisture in the environment from getting into the inner chamber of mount pad from the exhaust hole, makes the resistance card wet, accelerates the degradation of resistance card, leads to the arrester to explode.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to constitute a limitation on the invention. In the drawings:

fig. 1 shows an overall structural schematic diagram of a sealing structure of an embodiment of the present invention;

fig. 2 shows an overall structural schematic diagram of an upper end cap of a sealing structure of an embodiment of the present invention; and

fig. 3 shows a partial structural schematic diagram of the upper end cover of the sealing structure of the embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a mounting base; 11. an inner cavity; 20. an upper end cover; 21. a mounting cavity; 211. a first mounting cavity; 212. a second mounting cavity; 22. an exhaust hole; 30. a seal member; 40. a compression member; 41. a first pressing member; 42. a second pressing member; 50. a lower end cover; 60. a thrust plate bearing; 70. a spring; 80. a conductive tape; 90. resistance cards; 100. a slotted screw; 200. a sealing gasket; 300. epoxy adhesive; 400. RTV silicon rubber adhesive.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 3 in combination, the present invention provides a sealing structure, including: a mounting seat 10, the mounting seat 10 having an inner cavity 11; the upper end cover 20 is installed on the installation seat 10 and can seal the inner cavity 11, the upper end cover 20 comprises an installation cavity 21 and an exhaust hole 22, one end of the exhaust hole 22 is communicated with the inner cavity 11, the other end of the exhaust hole 22 is communicated with the installation cavity 21, and the exhaust hole 22 is communicated with the atmosphere through the installation cavity 21; and a sealing member 30, wherein the sealing member 30 is installed in the installation cavity 21, and the sealing member 30 can seal the exhaust hole 22.

In this embodiment, the sealing structure is a lightning arrester sealing structure, a core body, a thrust flat bearing 60, a spring 70, a conductive strip 80, a resistor disc 90, an electrode for a lightning arrester, a gasket, a pad cylinder, a slotted straight screw 100 and other parts are installed in an inner cavity 11 of an installation seat 10, an upper end cover 20 is installed at one end of the installation seat 10, a lower end cover 50 is installed at the other end of the installation seat 10, wherein an exhaust hole 22 is formed in the upper end cover 20, one end of the exhaust hole 22 is communicated with the inner cavity 11, and the other end of the exhaust hole 22 is communicated with an installation cavity 21, so that gas in the inner cavity 11 can be exhausted through the exhaust hole 22, and the assembly of the upper end cover 20 is facilitated. The sealing element 30 is installed in the installation cavity 21, the sealing element 30 can seal the exhaust hole 22, no gap exists between the sealing element 30 and the exhaust hole 22, sealing is tight, the sealing element 30 can further seal the inner cavity 11, and moisture in the environment is prevented from entering the inner cavity 11 of the installation seat 10 from the exhaust hole 22, so that the resistor disc 90 is affected with damp, the deterioration of the resistor disc 90 is accelerated, and the lightning arrester is exploded.

In one embodiment of the present invention, the sealing member 30 may be a rubber gasket, specifically, a silicone rubber; the upper end cover 20 and the lower end cover 50 are made of aluminum alloy materials, and moisture is prevented from invading the resistor disc 90 in the lightning arrester through the sand holes; the side surface of the resistance card 90 is made of high-temperature (500 ℃) resistant inorganic glass glaze; the electrode can be made of aluminum alloy, and can be replaced by cast aluminum or copper material, belonging to replaceable accessories.

With reference to fig. 1 to fig. 3, in an embodiment of the present invention, the sealing structure further includes a pressing member 40, the pressing member 40 is installed in the installation cavity 21, the pressing member 40 is located on one side of the sealing member 30 away from the exhaust hole 22, and the pressing member 40 can press the sealing member 30, so that the end surface of the sealing member 30 is attached to the end surface of the exhaust hole 22.

In this embodiment, the pressing member 40 is installed in the installation cavity 21, and can press the sealing member 30 tightly, so that the end surfaces of the sealing member 30 and the exhaust hole 22 are tightly attached, no gap exists between the end surfaces of the sealing member 30 and the exhaust hole 22, and the sealing effect is better. Moisture in the environment can not enter the inner cavity 11 through the exhaust holes 22, so that the parts in the inner cavity 11 can not be influenced by the moisture, and the working stability of the lightning arrester is further improved.

In one embodiment of the present invention, the inner wall of the installation cavity 21 is provided with a thread, and the pressing member 40 is connected to the installation cavity 21 by a thread.

In this embodiment, pressing member 40 and installation cavity 21 screw-thread fit can prevent that pressing member 40 from receiving external force and deviating from installation cavity 21 gradually in the use, and at this moment, pressing member 40 can not continue to compress tightly sealing member 30, and in long-term use, sealing member 30 also can deviate from installation cavity 21 gradually, leads to unable exhaust hole 22 to seal. In addition, the elastic deformation amount of the sealing element 30 can be controlled through the screw, and the sealing element 30 is prevented from deforming due to long-term mechanical compression to form a gap, so that the core body in the lightning arrester structure is prevented from being invaded by moisture and exploding.

In an embodiment of the present invention, the pressing member 40 may be an outer hexagon bolt.

Referring to fig. 1 to fig. 3, in an embodiment of the present invention, the mounting cavity 21 includes a first mounting cavity 211 and a second mounting cavity 212, the first mounting cavity 211 is communicated with the second mounting cavity 212, the second mounting cavity 212 is located on a side of the first mounting cavity 211 away from the exhaust hole 22, and the sealing element 30 is mounted in the first mounting cavity 211; the pressing member 40 includes a first pressing member 41 and a second pressing member 42, the first pressing member 41 is installed in the first installation cavity 211, the second pressing member 42 is installed in the second installation cavity 212, the first pressing member 41 is located on one side of the sealing member 30 away from the exhaust hole 22, one end of the first pressing member 41 abuts against the sealing member 30, and the other end of the first pressing member 41 abuts against the second pressing member 42.

In this embodiment, the first pressing member 41 is installed in the first installation cavity 211, the second pressing member 42 is installed in the second installation cavity 212, the second pressing member 42 abuts against one end, away from the sealing member 30, of the first pressing member 41, the sealing member 30 can be tightly attached to the end face where the exhaust hole 22 is located under the squeezing action of the first pressing member 41, the second pressing member 42 is located above the first pressing member 41, one end of the second pressing member 42 abuts against the first pressing member 41, and then squeezing acting force is applied to the first pressing member 41, so that the first pressing member 41 and the sealing member 30 can be ensured to be tightly attached to each other, and the sealing member 30 and the end face where the exhaust hole 22 is located can be tightly attached to each other, so that the sealing effect and the sealing stability are improved.

In an embodiment of the present invention, the first pressing member 41 may be an inner hexagon screw, and the second pressing member 42 may be a hexagon bolt, at this time, the inner wall of the first mounting cavity 211 is provided with a thread capable of cooperating with the inner hexagon screw, the inner wall of the second mounting cavity 212 is provided with a thread capable of cooperating with the hexagon bolt, the inner hexagon screw is screwed into the first mounting cavity 211 by using a wrench, and one end of the inner hexagon screw is pressed against the end surface of the sealing member 30, the other end is just flush with the bottom surface of the second mounting cavity 212, and then the hexagon bolt is screwed into the second mounting cavity 212 by using a wrench until one end of the hexagon bolt abuts against the upper surface of the inner hexagon screw.

Referring to fig. 2 and 3 in combination, in an embodiment of the present invention, the outer wall of the sealing member 30 is closely attached to the inner wall of the first mounting cavity 211.

In this embodiment, the outer wall of the sealing member 30 is closely attached to the inner wall of the first mounting cavity 211, so that the sealing member can seal the axial direction of the first mounting cavity 211, and prevent moisture from entering the inner cavity 11 from a gap, so that the resistor disc 90 inside the arrester is affected with damp, and the deterioration of the resistor disc 90 is accelerated, thereby causing the arrester to explode.

Referring to fig. 1 to 3, in an embodiment of the present invention, the central axis of the exhaust hole 22 is a first axis, the central axis of the first installation cavity 211 is a second axis, the central axis of the second installation cavity 212 is a third axis, and the first axis, the second axis and the third axis are collinear.

In this embodiment, first axis, second axis and third axis collineation, the straight line coincidence that the central axis of three belongs to promptly makes things convenient for the workman to process exhaust hole 22, first installation cavity 211 and second installation cavity 212 on upper end cover 20 like this, has reduced the processing degree of difficulty.

The utility model discloses an in one embodiment, there is the clearance first inner wall that compresses tightly 41 and first installation cavity 211, and the clearance intussuseption is filled with sealed glue.

In this embodiment, the clearance intussuseption between the inner wall of first pressing part 41 and first installation cavity 211 is filled with sealed glue, thus, sealing member 30 closely laminates with the terminal surface at exhaust hole 22 place under the effect of the first pressure of pressing part 41, seal up exhaust hole 22, form first sealed, the clearance intussuseption between the inner wall of first pressing part 41 and first installation cavity 211 is filled with sealed glue, can form the second after sealed glue solidification and seal up, under double seal structure, the unable inner chamber 11 that gets into mount pad 10 of moisture in the environment, can guarantee the sealing stability of arrester, and then improve the job stabilization nature of circuit.

The utility model discloses an embodiment, the second compresses tightly piece 42 and has the clearance with the inner wall of second installation cavity 212, and the clearance intussuseption is filled with sealed glue.

In this embodiment, the sealing element 30 is tightly attached to the end face of the exhaust hole 22 under the compression effect of the first compression element 41, so as to seal the exhaust hole 22, thereby forming a first seal, the gap between the second compression element 42 and the inner wall of the second installation cavity 212 is filled with a sealant, and a second seal can be formed after the sealant is cured, thereby improving the sealing stability of the lightning arrester.

The utility model discloses an embodiment, first piece 41 that compresses tightly is the cylinder, and the second compresses tightly 42 for the bolt, and the inner wall of second installation cavity 212 is provided with the screw thread, and the second compresses tightly 42 and can compress tightly first piece 41 that compresses tightly.

In this embodiment, the first pressing member 41 is a cylinder, the second pressing member 42 is a bolt, when performing the sealing operation, the cylinder is first installed in the first installation cavity 211, then the bolt is installed in the second installation cavity 212, and one end of the bolt is in contact with the upper surface of the cylinder, the bolt is screwed by using a wrench, the whole bolt is screwed into the second installation cavity 212, at this time, the bolt can apply an extrusion acting force to the cylinder in the process of screwing into the second installation cavity 212, so that the whole cylinder completely enters the first installation cavity 211, and the lower surface of the cylinder can be pressed and attached to the end surface of the sealing member 30.

Referring to fig. 1 to 3, in an embodiment of the present invention, one end of the second pressing member 42 is located in the second mounting cavity 212, and the other end of the second pressing member 42 is located outside the end cover.

In this embodiment, the second pressing member 42 is a bolt, so that the other end of the second pressing member 42 is located outside the end cover, which facilitates the worker to use a tool such as a wrench to assemble and disassemble the bolt.

As shown in fig. 1, in an embodiment of the present invention, a sealing gasket 200 is disposed at the installation position of the upper end cap 20, and epoxy adhesive 300 and RTV silicone rubber adhesive 400 are respectively coated at the corresponding installation positions of the lower end cap 50.

According to another aspect of the present invention, there is provided a lightning arrester, comprising a conductive strip 80, a resistor disc 90 and the above-mentioned sealing structure.

In this embodiment, the lightning arrester has all the advantages of the above-mentioned sealing structure, and the description thereof is omitted.

The lightning arrester is assembled as follows: the electrodes, the resistor group, the gaskets and the cushion cylinder for the lightning arrester are subjected to heat shrinkage through the heat shrinkage pipe to form a core body; the upper electrode of the core body is sleeved with a spring 70 and is connected with the upper end cover 20; the lower end of the core body is connected with the lower end cover 50 through a straight slotted bolt; coating AB mixed sealant on the thread of the mounting seat 10; the end surfaces of the upper end cover 20 and the lower end cover 50 are respectively provided with an annular sealing ring; installing the sealing member 30 into the first installation cavity 211; coating sealant on the thread of the socket head cap screw, then loading the socket head cap screw into the first mounting cavity 211, and screwing until the screw is completely loaded into the first mounting cavity 211; finally, the hexagon bolt is installed in the second installation cavity 212.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the upper end cover of the mounting seat is provided with an exhaust hole, one end of the exhaust hole is communicated with the inner cavity, the other end of the exhaust hole is communicated with the mounting cavity, and gas in the inner cavity can be exhausted through the exhaust hole, so that the upper end cover is convenient to assemble. The sealing member is installed in the installation intracavity, and the sealing member can seal the exhaust hole to there is not the clearance between sealing member and the exhaust hole, and is sealed tight, and the setting of sealing member also can seal the inner chamber simultaneously, prevents that the inside part of arrester from suffering the invasion of moisture, causes the arrester to explode.

It is to be understood that the above-described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing structure, comprising:

a mounting seat (10), the mounting seat (10) having an inner cavity (11);

the upper end cover (20) is installed on the installation seat (10) and can seal the inner cavity (11), the upper end cover (20) comprises an installation cavity (21) and an exhaust hole (22), one end of the exhaust hole (22) is communicated with the inner cavity (11), the other end of the exhaust hole (22) is communicated with the installation cavity (21), and the exhaust hole (22) is communicated with the atmosphere through the installation cavity (21);

a seal (30), the seal (30) being mounted within the mounting cavity (21), the seal (30) being capable of sealing the exhaust aperture (22).

2. The sealing structure according to claim 1, characterized in that the sealing structure further comprises a pressing piece (40), the pressing piece (40) is installed in the installation cavity (21), the pressing piece (40) is located on one side, away from the exhaust hole (22), of the sealing piece (30), and the pressing piece (40) can press the sealing piece (30) so that the end face of the sealing piece (30) is attached to the end face where the exhaust hole (22) is located.

3. The seal structure of claim 2, characterized in that the inner wall of the mounting cavity (21) is provided with threads, and the pressing member (40) is screwed with the mounting cavity (21).

4. The seal structure according to claim 2, characterized in that the mounting chamber (21) includes a first mounting chamber (211) and a second mounting chamber (212), the first mounting chamber (211) communicates with the second mounting chamber (212), the second mounting chamber (212) is located on a side of the first mounting chamber (211) away from the exhaust hole (22), and the seal member (30) is mounted in the first mounting chamber (211).

5. The seal structure of claim 4, wherein an outer wall of the seal (30) is in close abutment with an inner wall of the first mounting cavity (211); and/or the presence of a gas in the gas,

the central axis of exhaust hole (22) is first axis, the central axis of first installation cavity (211) is the second axis, the central axis of second installation cavity (212) is the third axis, first axis, the second axis and the third axis collineation.

6. The seal structure according to claim 4, characterized in that the pressing member (40) includes a first pressing member (41) and a second pressing member (42), the first pressing member (41) is installed in the first installation cavity (211), the second pressing member (42) is installed in the second installation cavity (212), the first pressing member (41) is located on a side of the sealing member (30) away from the exhaust hole (22), one end of the first pressing member (41) abuts against the sealing member (30), and the other end of the first pressing member (41) abuts against the second pressing member (42).

7. The seal structure of claim 6, wherein a gap exists between the first pressing member (41) and the inner wall of the first mounting cavity (211), and the gap is filled with a sealant; and/or the presence of a gas in the gas,

and a gap exists between the second pressing piece (42) and the inner wall of the second mounting cavity (212), and the gap is filled with sealant.

8. The seal structure according to claim 6, characterized in that the first pressing member (41) is a cylinder, the second pressing member (42) is a bolt, the inner wall of the second mounting cavity (212) is provided with a thread, and the second pressing member (42) can press the first pressing member (40).

9. The seal structure of claim 8, characterized in that one end of the second hold-down member (42) is located within the second mounting cavity (212) and the other end of the second hold-down member (42) is located outside the upper end cap (20).

10. An arrester, characterized by comprising an electrically conductive strip (80), a resistive sheet (90) and a sealing structure according to any one of claims 1 to 9.