阅读说明：本技术 一种复合绝缘子及其制造方法 (Composite insulator and manufacturing method thereof ) 是由 叶霖 严锋 董建毅 于 2019-03-07 设计创作，主要内容包括：本发明是一种复合绝缘子及其制造方法,涉及一种在输变电行业所使用的绝缘子及其制造方法,用于解决绝缘子在制造过程中易导致绝缘芯体机械强度不足和绝缘子界面绝缘及防水性能不太理想的问题。本发明的复合绝缘子包括绝缘芯体、设置在绝缘芯体两端的法兰和包覆在绝缘芯体外的至少一个硅橡胶外套,所述硅橡胶外套在自然状态下,内径略小于绝缘芯体的外径。本发明制造方法包括以下步骤：将硅橡胶外套套装在套管工装的外壁；将绝缘芯体插入套管工装大口段内；将硅橡胶外套移动至绝缘芯体设定位置并将二者固定；然后将套管工装小口段反方向抽出,直至硅橡胶外套留在绝缘芯体上；组装法兰并胶装密封。本发明的复合绝缘子可广泛应用于输变电行业。(The invention relates to a composite insulator and a manufacturing method thereof, in particular to an insulator used in the power transmission and transformation industry and a manufacturing method thereof, which are used for solving the problems that the mechanical strength of an insulating core body is insufficient and the insulating and waterproof performances of an insulator interface are not ideal in the manufacturing process of the insulator. The composite insulator comprises an insulating core body, flanges arranged at two ends of the insulating core body and at least one silicon rubber outer sleeve coated outside the insulating core body, wherein the inner diameter of the silicon rubber outer sleeve is slightly smaller than the outer diameter of the insulating core body in a natural state. The manufacturing method comprises the following steps: sleeving a silicone rubber outer sleeve on the outer wall of the sleeve tool; inserting the insulating core body into the large opening section of the sleeve tool; moving the silicon rubber outer sleeve to a set position of the insulating core body and fixing the silicon rubber outer sleeve and the insulating core body; then the small opening section of the sleeve tool is pulled out in the opposite direction until the silicone rubber outer sleeve is left on the insulating core body; assembling the flange and cementing and sealing. The composite insulator can be widely applied to the power transmission and transformation industry.)

1. The utility model provides a composite insulator, includes insulating core (2), sets up flange (1, 5) at insulating core (2) both ends, its characterized in that:

still including cladding at least a lesson silicon rubber overcoat (3) outside insulating core (2), silicon rubber overcoat (3) utilize the mould to make alone, silicon rubber overcoat (3) are under natural state, and the internal diameter slightly is less than the external diameter of insulating core (2).

2. The composite insulator of claim 1, wherein: the silicone rubber outer sleeve (3) is formed by combining a plurality of sections.

3. The composite insulator of claim 2, wherein: the silicone rubber outer sleeve (3) is made of an elastic silicone rubber material, the breaking elongation of the elastic silicone rubber material is not less than 100%, and the hardness of the elastic silicone rubber material is not more than 80 Shore A.

4. The composite insulator of claim 3, wherein: the butt joint of the multi-section combined silicon rubber outer sleeve (3) is lapped by adopting an upper stop buckle and a lower stop buckle.

5. The composite insulator of claim 1, wherein: and silicone grease or other lubricating filler auxiliary materials are adopted between the interface of the silicone rubber outer sleeve (3) and the insulating core body (2).

6. The composite insulator of claim 1, wherein: the port of the silicon rubber outer sleeve (3) is clamped in the rabbet of the flanges (1, 5) and is bonded and sealed by using silicon rubber sealant (4).

7. The composite insulator of claim 1, wherein: the port of the silicon rubber outer sleeve (3) is sleeved and contracted on the outer circles of the flanges (1 and 5) and is bonded and sealed by using silicon rubber sealant (4).

8. The manufacturing method of the composite insulator is characterized by comprising the following steps of:

a. the small opening section (61) of the sleeve tool (6) is firstly inserted into the formed silicon rubber outer sleeve (3) until the silicon rubber outer sleeve (3) is sleeved on the outer wall of the large opening section (62) of the sleeve tool (6);

b. inserting the insulating core body (2) into the large opening section (62) of the sleeve tool (6), and slightly extending one end of the insulating core body out of the large opening section (62) of the sleeve tool (6);

c. moving the silicon rubber outer sleeve (3) to a set position of an exposed end of the insulating core body (2) and fixing the silicon rubber outer sleeve and the insulating core body, and then drawing out the small opening section (61) at the other end of the sleeve tool (6) in the opposite direction until the silicon rubber outer sleeve (3) is left on the insulating core body (2);

d. assembling the flanges (1 and 5), cementing and curing the flanges (1 and 5), and sealing the seam allowances of the flanges (1 and 5) and the joints of the flanges and the silicon rubber outer sleeves (3) by using silicon rubber sealants (4).

9. The manufacturing method of the composite insulator is characterized by comprising the following steps of:

a. inserting the small opening section (61) of the sleeve tool (6) into a first section of the formed and processed multiple sections of silicon rubber outer sleeves (3), and sleeving the first section of silicon rubber outer sleeve (3) on the outer wall of the large opening section (62) of the sleeve tool (6);

b. inserting the insulating core body (2) into the large opening section (62) of the sleeve tool (6), and slightly extending one end of the insulating core body out of the large opening section (62) of the sleeve tool (6);

c. moving the first section of silicon rubber outer sleeve (3) to a set position of an exposed end of the insulating core body (2) and fixing the first section of silicon rubber outer sleeve and the exposed end of the insulating core body, and then pulling out a small opening section (61) at the other end of the sleeve tool (6) in the opposite direction until the first section of silicon rubber outer sleeve (3) is left on the insulating core body (2);

d. by the same method, the rest silicon rubber outer sleeves (3) are sleeved and contracted on the insulating core body (2) section by section, and two adjacent silicon rubber outer sleeves (3) are lapped and sealed in a buckling-stopping sleeving manner;

e. assembling the flanges (1 and 5), cementing and curing the flanges (1 and 5), and sealing the seam allowances of the flanges (1 and 5) and the joints of the flanges and the silicon rubber outer sleeves (3) by using silicon rubber sealants (4).

Technical Field

The invention relates to an insulator used in the power transmission and transformation industry and a manufacturing method thereof, in particular to a composite insulator and a manufacturing method thereof.

Background

The insulator plays an important role in a power transmission and transformation system, particularly the composite insulator is increasingly widely applied, and the existing composite insulator silicone rubber outer sleeve is usually combined with an insulating core body in a production process mode of bonding or high-temperature vulcanization composite molding and the like.

By adopting a high-temperature vulcanization composite molding production process, when the silicone rubber jacket is subjected to high-temperature vulcanization molding, the insulating core body needs to bear high temperature and high pressure, and certain potential adverse effects can be generated on the mechanical strength of the composite insulator; the production process of bonding the insulating core by the silicone rubber jacket has the problem that the bonding interface of the silicone rubber jacket and the insulating core is not ideal in insulation and waterproof performance.

Disclosure of Invention

In order to solve the problems that the mechanical strength of an insulating core body is insufficient and the insulating and waterproof performances of an insulator interface are not ideal easily caused in the manufacturing process of the insulator in the background technology, the invention provides a composite insulator and a manufacturing method thereof.

In order to achieve the purpose, the technical solution of the invention is as follows:

the utility model provides a composite insulator, includes insulating core and sets up the flange at insulating core both ends, its special character lies in:

the insulation core is characterized by further comprising at least one section of silicon rubber outer sleeve wrapping the insulation core, wherein the inner diameter of the silicon rubber outer sleeve is slightly smaller than the outer diameter of the insulation core in a natural state.

Furthermore, in order to facilitate production and installation, the silicone rubber outer sleeve is formed by combining a plurality of sections;

furthermore, in order to ensure that the silicone rubber outer sleeve maintains elastic lasting and stable holding force on the insulating core, improve the reliability of interface insulation and sealing and facilitate installation, the silicone rubber outer sleeve is made of an elastic silicone rubber material, the breaking elongation of the silicone rubber outer sleeve is not less than 100%, and the hardness of the silicone rubber outer sleeve is not more than 80 Shore A;

furthermore, in order to enhance the sealing effect between the multiple sections of combined and formed silicon rubber outer sleeves, the butt joints of the multiple sections of combined and formed silicon rubber outer sleeves are overlapped in a mode of sleeving upper and lower stop buckles;

furthermore, auxiliary materials such as silicone grease or other lubricating fillers are adopted between the interface of the silicone rubber outer sleeve and the insulating core;

furthermore, the port of the silicone rubber outer sleeve is clamped in the flange spigot, and is bonded and sealed by using auxiliary materials such as silicone rubber sealant and the like;

furthermore, the end opening of the silicon rubber outer sleeve is sleeved and contracted on the outer circle of the flange, and is bonded and sealed by using auxiliary materials such as silicon rubber sealant and the like.

Meanwhile, the invention also provides a manufacturing method of the integral silicone rubber jacket composite insulator, which is characterized by comprising the following steps:

a. inserting the small opening section of the sleeve tool into the formed and processed silicon rubber outer sleeve until the silicon rubber outer sleeve is completely sleeved on the outer wall of the large opening section of the sleeve tool;

b. inserting the insulating core body into the large opening section of the sleeve tool, and slightly extending one end of the insulating core body out of the large opening section of the sleeve tool;

c. moving the silicon rubber outer sleeve to a set position of an exposed end of the insulating core body, fixing the silicon rubber outer sleeve and the exposed end of the insulating core body, and then drawing out the small-opening section at the other end of the sleeve tool in the opposite direction until the silicon rubber outer sleeve is left on the insulating core body;

d. assembling the flange, then cementing and curing the flange, and sealing the joint of the flange and the silicone rubber outer sleeve by using silicone rubber sealant;

and auxiliary materials such as silicone grease or other lubricating fillers can be smeared between the interface of the silicone rubber outer sleeve and the insulating core.

Meanwhile, the invention also provides a manufacturing method of the composite insulator using the multi-section combined silicon rubber outer sleeve, which is characterized by comprising the following steps:

a. inserting the small-opening section of the sleeve tool into a first section of a plurality of sections of molded silicon rubber outer sleeves, so that the first section of the silicon rubber outer sleeve is completely sleeved on the outer wall of the large-opening section of the sleeve tool;

b. inserting the insulating core body into the large opening section of the sleeve tool, and slightly extending one end of the insulating core body out of the large opening section of the sleeve tool;

c. moving the first section of silicon rubber outer sleeve to a set position of an exposed end of the insulating core body, fixing the first section of silicon rubber outer sleeve and the exposed end of the insulating core body, and then drawing out the small-opening section at the other end of the sleeve tool in the opposite direction until the first section of silicon rubber outer sleeve is left on the insulating core body;

d. by the same method, the rest silicon rubber outer sleeves are sleeved and contracted on the insulating core section by section, and two adjacent silicon rubber outer sleeves are lapped and sealed in a buckling-stopping sleeving manner;

e. assembling a flange, cementing and curing the flange, and sealing the joint of the flange and the silicone rubber outer sleeve by using silicone rubber sealant;

the interface between the silicone rubber outer sleeve and the insulating core body can be coated with silicone grease or other lubricating fillers, and the lap joint of two adjacent sections of silicone rubber outer sleeves can be coated with auxiliary materials such as silicone rubber sealant.

The invention has the advantages that:

1. the silicon rubber outer sleeve is made of elastic silicon rubber materials and is formed independently by using a die, so that the adverse effect of high temperature and high pressure of a high-temperature vulcanization process on the mechanical strength of the insulating core body is avoided;

2. the inner hole of the silicon rubber outer sleeve is shrunk on the insulating core in a sleeved mode after expansion, the silicon rubber outer sleeve keeps elastic, lasting and stable holding force on the insulating core by means of the elastic memory function of the silicon rubber, reliability of interface insulation and sealing of the insulating core is improved, and risks of degumming, cracking, layering or sealing failure and the like are avoided;

3. the silicone rubber jacket has simple structure and is molded by using a mold, so the production efficiency is high, the quality is stable and the qualification rate is high;

4. for the composite insulator silicon rubber outer sleeve with larger specification, a plurality of sections of combined formed silicon rubber outer sleeves can be adopted, so that the manufacture and installation are more convenient, the butt joint of the sleeved silicon rubber outer sleeves is lap-jointed and sealed in a manner of buckling and sleeving the upper stop and the lower stop, and the butt joint can be coated with auxiliary materials such as silicon rubber sealant and the like so as to enhance the sealing effect;

5. auxiliary materials such as silicone grease or other lubricating fillers can be adopted between the interface of the silicone rubber outer sleeve and the insulating core body, so that the silicone rubber outer sleeve and the insulating core body are completely and tightly attached, and the interface insulation and sealing effects are enhanced;

6. the silicone rubber outer sleeve is sealed with the flange at two ends of the composite insulator, two lapping modes can be selected, one mode is that the silicone rubber outer sleeve is clamped in a flange spigot, the other mode is that the silicone rubber outer sleeve is sleeved and contracted on the outer circle of the flange, and the two lapping effects can further seal the port.

Drawings

FIG. 1 is a schematic view of a composite insulator shrink-fitted with an entire silicone rubber outer sleeve;

FIG. 2 is a schematic view of a composite insulator shrunk and sleeved by a multi-section combined silicone rubber outer sleeve;

FIG. 3 is a partial structure diagram of the joint of a multi-joint combined silicone rubber casing;

fig. 4 is a schematic view of the installation of a silicone rubber jacket using a sleeve tool.

The reference numbers are as follows:

1-flange, 2-insulating core, 3-silicon rubber jacket, 4-silicon rubber sealant, 5-flange, 6-sleeve tool, 61-small opening section and 62-large opening section.

Detailed Description

The invention will be described in further detail with reference to the accompanying drawings, in which:

as shown in fig. 1, the composite insulator comprises an insulating core 2, flanges 1 and 5 arranged at two ends of the insulating core 2, and a silicone rubber outer sleeve 3 coated outside the insulating core 2;

the silicone rubber jacket 3 is made of an elastic silicone rubber material, and has an elongation at break of not less than 100% and a hardness of not more than 80 Shore A;

the whole section of the silicone rubber outer sleeve 3 is formed by a mould in a whole section; the silicon rubber outer sleeve 3 is in a natural state, the inner diameter is slightly smaller than the outer diameter of the insulating core 2, so that the silicon rubber outer sleeve 3 can be installed on the insulating core 2, meanwhile, the silicon rubber outer sleeve 3 is shrunk on the outer wall of the insulating core 2 in a sleeved mode, and the inner wall of the silicon rubber outer sleeve 3 is kept in tight fit with the outer surface of the insulating core 2 after assembly is finished.

As shown in fig. 4, the casing tool 6 is a tool for assisting in installing the silicone rubber jacket 3, and has a small opening section 61 at one end and a large opening section 62 at the other end; the outer diameter of the small opening section 61 is smaller than the inner diameter of the silicon rubber outer sleeve 3; the inner diameter of the wide-mouth section 62 is slightly larger than the outer diameter of the insulating core 2; the sleeve tool 6 is smooth in surface and hard in material.

Before installation, auxiliary materials such as silicone grease or other lubricating fillers can be smeared on the surfaces of the inner wall of the silicone rubber outer sleeve 3 and the outer wall of the insulating core 2; firstly, the silicone rubber outer sleeve 3 can be completely and tightly attached to the insulating core body 2, and the interface insulation and sealing effects are enhanced; secondly, the silicone rubber outer sleeve 3 can be more easily sleeved on the large opening section 62 of the sleeve tool 6, separated from the large opening section 62 and mounted on the outer wall of the insulating core body 2.

Firstly, inserting the small opening section 61 of the sleeve tool 6 into the formed silicon rubber outer sleeve 3 until the silicon rubber outer sleeve 3 is completely sleeved on the outer wall of the large opening section 62 of the sleeve tool 6;

inserting the insulating core body 2 into the large opening section 62 of the sleeve tool 6, and slightly extending one end of the insulating core body 2 out of the large opening section 62 of the sleeve tool 6;

moving the silicon rubber outer sleeve 3 to a set position of an exposed end of the insulating core body 2, fixing the silicon rubber outer sleeve and the insulating core body, then pulling out the small opening section 61 at the other end of the sleeve pipe tool 6 in the opposite direction until the silicon rubber outer sleeve 3 is left on the insulating core body 2, and properly adjusting the position of the silicon rubber outer sleeve 3;

after the flanges 1 and 5 are assembled, the flanges 1 and 5 are glued and cured, and the joints of the flanges 1 and 5 and the silicon rubber outer sleeves 3 are sealed by silicon rubber sealant 4;

and finally, completing the assembly of the composite insulator product, as shown in figure 1.

Embodiment two of the method of the present invention, as shown in fig. 2, fig. 3, and fig. 4:

the composite insulator comprises an insulating core body 2, flanges 1 and 5 arranged at two ends of the insulating core body 2 and a plurality of sections of combined silicone rubber outer sleeves 3 coated outside the insulating core body 2.

The multi-section combined silicone rubber outer sleeve 3 is made of an elastic silicone rubber material, the breaking elongation of the multi-section combined silicone rubber outer sleeve is not less than 100%, and the hardness of the multi-section combined silicone rubber outer sleeve is not more than 80 Shore A;

the multiple sections of the silicon rubber outer sleeves 3 are independently molded by utilizing a mold; the silicon rubber outer sleeve 3 is in a natural state, the inner diameter is slightly smaller than the outer diameter of the insulating core 2, so that the silicon rubber outer sleeve 3 can be installed on the insulating core 2, meanwhile, the silicon rubber outer sleeve 3 is shrunk on the outer wall of the insulating core 2 in a sleeved mode, and the inner wall of the silicon rubber outer sleeve 3 is kept in tight fit with the outer surface of the insulating core 2 after assembly is finished.

As shown in fig. 4, the casing tool 6 is a tool for assisting in installing the silicone rubber jacket 3, and has a small opening section 61 at one end and a large opening section 62 at the other end; the outer diameter of the small opening section 61 is smaller than the inner diameter of the silicon rubber outer sleeve 3; the inner diameter of the wide-mouth section 62 is slightly larger than the outer diameter of the insulating core 2; the sleeve tool 6 is smooth in surface and hard in material.

Before installation, auxiliary materials such as silicone grease or other lubricating fillers can be smeared on the surfaces of the inner wall of the silicone rubber outer sleeve 3 and the outer wall of the insulating core 2; firstly, the silicone rubber outer sleeve 3 can be completely and tightly attached to the insulating core body 2, and the interface insulation and sealing effects are enhanced; secondly, the silicone rubber outer sleeve 3 can be more easily sleeved on the large opening section 62 of the sleeve tool 6, separated from the large opening section 62 and mounted on the outer wall of the insulating core body 2.

As shown in the method of fig. 4, the small-mouth section 61 of the casing tool 6 is inserted into the first section of the multi-section combined silicone rubber outer sleeve 3 which is formed and processed, so that the silicone rubber outer sleeve 3 is completely sleeved on the outer wall of the large-mouth section 62 of the casing tool 6;

inserting the insulating core body 2 into the large opening section 62 of the sleeve tool 6, and slightly extending one end of the insulating core body out of the large opening section 62 of the sleeve tool 6;

moving the first section of the silicon rubber outer sleeve 3 to a set position of an exposed end of the insulating core body 2, fixing the first section of the silicon rubber outer sleeve and the exposed end of the insulating core body 2, and then pulling out the small opening section 61 at the other end of the sleeve tool 6 in the opposite direction until the first section of the silicon rubber outer sleeve 3 is left on the insulating core body 2;

the rest silicon rubber outer sleeves 3 are sleeved and contracted on the insulating core body 2 section by the same method, and two adjacent silicon rubber outer sleeves 3 are lapped and sealed in a buckling-stopping sleeving manner; the overlapping effect of the buckle-stop nesting mode is shown in figure 3;

after the flanges 1 and 5 are assembled, the flanges 1 and 5 are glued and cured, and the joints of the flanges 1 and 5 and the silicon rubber outer sleeves 3 are sealed by silicon rubber sealant 4;

the final assembly of the composite insulator product is shown in fig. 2.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.