Flexible sleeve and application thereof
By using the collar colloid and grip colloid of the soft sleeve on the dry blank of porcelain insulator, the problem of damage and glaze mixing during the pick-up and glaze of the dry blank is solved, and the consistency of the glaze layer is achieved and improve production efficiency.
Patent Information
- Application Number
- CN202411519453.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-01-07
AI Technical Summary
In the production process of porcelain electric insulators, the picking and glazing operations of dry blanks are likely to cause damage and glaze mixing, affecting product quality and production efficiency.
A soft sleeve, including coaxially arranged collar colloid and grip colloid, is used to lift and protect dry blanks, ensure the consistency of the glaze layer in different parts, and is sealed and held by the collar colloid The cover-shaped protection of the colloid is to avoid damage and glaze mixing.
It effectively avoids damage to the end of the dry blank and mixing glaze, improves product yield and production efficiency, and reduces the probability of defects in the lifting process.
Smart Images
Figure CN119274901A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a technology in the field of porcelain insulator manufacturing, in particular to a soft bushing and application thereof. Background Art
[0002] In the production of porcelain power insulators, the raw materials must be made into dry blanks of the required insulation structure type according to the relevant design and process requirements, and then the porcelain parts can be obtained through glazing and baking processes. Before glazing, the porcelain blanks are in a state of tendency to dryness and contain a certain amount of moisture. At this time, if the operation of taking and placing the porcelain blanks causes improper force, the risk of collision damage will be greatly increased.
[0003] It has been found in production practice that in the process of picking up the dry blank for glazing, different picking positions affect the picking and placing efficiency and product yield. When holding at the end area of the end head, it is more difficult to control the holding area, and it is easy to apply too much force to the edge of the end of the holding area (chamfer), causing defects; and when holding at the waist position of the end head (weak strength area), the probability of damage will increase.
[0004] In addition to influencing factors such as insulator structure design, dry blank raw material composition and manufacturing process, the final performance of the porcelain part also depends on the glaze layer on the surface of the blank. In the currently known porcelain insulator technology, a layer of glaze is generally applied to the whole body of the dry blank. However, for high-performance porcelain insulator products for ultra-high voltage and UHV, a single full-body glaze layer is sometimes difficult to meet the use requirements. In this regard, the study believes that it is effective to apply glazes of different performances separately to different parts of the dry blank (umbrella part, end head).
[0005] For applying glazes in steps to obtain glaze layers with different properties in different parts, the general operation is to first apply glaze A to some areas of the dry blank product, and then transfer it after it is dry, and apply glaze B to the remaining areas. During the operation, when the glaze layer of the current area is applied, if there is no wrapping measure for the other area to be glazed, there is a risk that the later glazed area will be contaminated with glaze A. The glaze B in the later glazed area will mix with glaze A, resulting in a decrease in the consistency of the glaze layer, and the later porcelain performance will be lower than expected; if the protective measure of plastic wrapping is adopted, it will lead to a decrease in production efficiency.
[0006] In order to solve the above problems in the prior art, the present invention is provided. Summary of the invention
[0007] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a soft sleeve and application thereof, which can not only be used to lift dry blanks to avoid damage to the end portions of the dry blanks, but also can effectively protect the dry blanks during the glazing process to avoid mixing of glazes of different compositions, thereby ensuring the consistency of different glaze layers and improving product yield.
[0008] The first aspect of the present invention relates to a soft sleeve, the Shore hardness A of the soft sleeve is 40-60, comprising: a collar colloid and a gripping part colloid coaxially arranged and integrally formed;
[0009] In the axial direction, the inner diameter of the collar colloid is consistent from the front end to the rear end;
[0010] In the axial direction, the farther away from the collar colloid is, the larger the inner diameter of the gripping portion colloid is.
[0011] For some specific embodiments, in the axial direction, the farther away from the collar colloid is, the greater the thickness of the gripping portion colloid is.
[0012] For some specific embodiments, in the axial direction, the farther away from the gripping portion colloid is, the smaller the thickness of the collar colloid is.
[0013] For some specific implementation schemes, the soft sleeve is made of natural rubber, silicone rubber or butyl rubber.
[0014] The second aspect of the present invention relates to the application of the above-mentioned soft sleeve in the dry blank lifting and glazing protection of porcelain insulators.
[0015] When applied to disc-shaped suspension porcelain insulator blanks, the collar colloid is set on the porcelain blank at the position where the tangent of the arc chamfer between the end of the porcelain blank and the umbrella extends from the starting point of the tangent to the waist of the porcelain blank end within a range of no more than 15 mm.
[0016] When applied to the porcelain blank of a rod-shaped porcelain insulator, the collar colloid is set on the porcelain blank at the following positions: the end portions at both ends of the blank; a soft sleeve is set at the end opposite to the upper umbrella surface, extending from the starting point of the tangent of the arc chamfer of the end portion of the porcelain blank and the umbrella portion toward the waist portion of the end portion of the porcelain blank within a range not exceeding 30 mm; and another soft sleeve is arranged symmetrically with the previous soft sleeve up and down.
[0017] Compared with the prior art, the present invention has the following technical effects:
[0018] 1) The colloid in the neck ring forms a seal on the end of the porcelain blank to prevent the end of the porcelain blank from being contaminated by the glaze slurry spreading from the rod; while the colloid in the gripping part forms a cover-shaped protection for the main area of the end of the porcelain blank to prevent the end of the porcelain blank from being contaminated by the accidentally splashed glaze slurry;
[0019] 2) During the lifting process, the collar colloid makes uniform contact with the higher strength area at the end of the porcelain blank in the circumferential range, while a gap is left between the gripping part colloid and the waist area at the end of the porcelain blank, avoiding direct damage and hidden extrusion damage during the lifting and turnover process. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic cross-sectional structure diagram of Example 1;
[0021] Figure 2 This is a schematic diagram of the embodiment 1 applied to the lifting and protection of the dry blank of the disc-shaped suspension porcelain insulator;
[0022] Figure 3 This is a schematic diagram of the embodiment 1 applied to the lifting and protection of the dry blank of the rod-shaped porcelain insulator;
[0023] In the figure: 100, soft sleeve; 101, collar colloid; 102, gripping part colloid; 200, disc-shaped suspension porcelain insulator dry blank; 300, rod-shaped porcelain insulator dry blank. DETAILED DESCRIPTION
[0024] The present invention is described in detail below with reference to the accompanying drawings and specific implementation modes.
[0025] Example 1
[0026] like Figure 1 As shown, this embodiment relates to a soft sleeve and its application. The soft sleeve is made of silicone rubber with a Shore hardness of 40 to 60. It has a certain elasticity and shrinkage capacity to ensure the sealing of the contact part after the product is sleeved on the porcelain blank, and forms a certain structural resistance during the lifting process to prevent the soft sleeve from detaching from the porcelain blank. The soft sleeve 100 includes a coaxially arranged and integrally formed collar colloid 101 and a gripping part colloid 102. The collar colloid is used to be sleeved on the area near the umbrella part of the end of the porcelain blank. In the sleeved state, the inner ring of the collar colloid fits the end of the porcelain blank and presents a cylindrical surface.
[0027] The specific structure and dimensions of the soft tube 100 are described below with the collar colloid 101 as the bottom and the gripping part colloid 102 as the top.
[0028] The shape of the collar colloid 101 is an inverted boss shape. Any cut along the central axis can obtain a first longitudinal section with a section height of h1. The length of the lower base of the section is b1, and the size of b1 is 3 to 5 mm. The length of the upper base b3 of the section is twice the length of the lower base b1. The inner surface of the section is parallel to the central axis, and the angle between the outer surface of the section and the central axis is 17°.
[0029] The shape of the gripping portion colloid 102 is an inverted boss shape. It can be cut arbitrarily along the central axis to obtain a second longitudinal section, in which the length b2 of the upper base side of the section is 5 times the length b3 of the lower base side (i.e., the upper base side of the first longitudinal section); the inner surface of the section is inclined relative to the central axis at an angle of 9° to avoid squeezing the end of the dry blank; the outer surface of the section is inclined relative to the central axis at an angle of 30° to provide an effective gripping area.
[0030] like Figure 2 As shown, Figure 1 Schematic diagram of the state of the medium-soft bushing 100 being installed on the end of a 550kN-class disc-shaped suspension porcelain insulator dry blank 200 for UHV power grid, wherein the height h1=12mm; in the installed state, the collar colloid sleeve is placed on the end of the dry blank, starting from the starting point of the tangent of the circular arc chamfer between the end of the porcelain dry blank and the umbrella, and extending within a range of 15mm in the direction of the waist of the end of the porcelain dry blank.
[0031] like Figure 3 As shown, Figure 1 Schematic diagram of the state of the medium soft bushing 100 being installed on the end of the rod-shaped porcelain insulator dry blank 300 of the 110kV substation, where the height h1=25mm; in the installed state, the collar colloid sleeve is placed on the ends of the dry blank. A soft bushing is set at the end opposite to the upper umbrella surface (at Figure 3 The middle is the upper end), starting from the starting point of the tangent of the arc chamfer of the end of the porcelain blank and the umbrella part, extending within 30mm in the direction of the waist of the end of the porcelain blank; the sleeve position of the collar colloid at the other end is symmetrical with it up and down.
[0032] When the above-mentioned disc-shaped suspension porcelain insulator dry blanks and rod-shaped insulator dry blanks are glazed on the umbrella part, the collar colloid forms a seal on the end of the dry blank, which can effectively prevent the end from being contaminated by the glaze in the umbrella area; the inner ring of the gripping part colloid does not contact the end of the dry blank. When the gripping part is used to lift the dry blank, the force acts on the area with higher strength at the end of the dry blank through the collar colloid, and will not cause extrusion to other parts with lower strength at the end of the dry blank, thereby avoiding extrusion damage.
[0033] The defects (closely related to external forces) of 550kN disc-shaped suspension porcelain insulator dry blanks for UHV power grid and 110kV substation rod-shaped porcelain insulator dry blanks were tracked. The visual defect types in the handling area of 550kN disc-shaped suspension porcelain insulator dry blanks for UHV power grid are mainly indentation, cracks, and abrasions; the visual defect types in the handling area of 110kV substation rod-shaped porcelain insulator dry blanks are mainly indentation and abrasions.
[0034] For porcelain insulators with different glaze layers on the umbrella and end, if a straight rubber ring is used to fit the protection area (the end that is glazed later) and then carried (the operator usually holds and holds the area from the waist or from the waist to the end of the end): the probability of three types of defects in the dry blank of 550kN disc-shaped suspension porcelain insulators is 2% to 3%; the probability of two types of defects in the dry blank of 110kV substation rod-shaped porcelain insulators is 1% to 1.5%;
[0035] If a straight sponge ring is used to fit the protection area before transportation, the probability of three types of defects in the 550kN disc-shaped suspension porcelain insulator dry blank reaches 1% to 2%; the probability of two types of defects in the 110kV substation rod-shaped porcelain insulator dry blank reaches 1% to 1.3%;
[0036] By using the soft sleeve of the present invention to sleeve a specific area, the probability of the above-mentioned visual defects is reduced to 0, thereby effectively avoiding the occurrence of defects in the vulnerable area.
[0037] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A soft casing, characterized in that: The soft sleeve has a Shore A hardness of 40 to 60 and comprises: a coaxially arranged and integrally formed collar colloid and a gripping portion colloid; In the axial direction, the inner diameter of the collar colloid is consistent from the front end to the rear end; In the axial direction, the farther away from the collar colloid is, the larger the inner diameter of the gripping portion colloid is.
2. The soft sleeve according to claim 1, characterized in that: The soft sleeve is made of natural rubber, silicone rubber or butyl rubber.
3. The soft sleeve according to claim 1, characterized in that: In the axial direction, the farther away from the collar colloid is, the thicker the gripping portion colloid is.
4. The soft sleeve according to claim 3, characterized in that: In the axial direction, the farther away from the gripping portion colloid is, the smaller the thickness of the collar colloid is.
5. The soft sleeve according to claim 1, characterized in that: The thickness of the collar colloid at one end away from the gripping part colloid is 3-5 mm.
6. The soft sleeve according to claim 5, characterized in that: The thickness of the collar colloid at one end close to the gripping part is twice the thickness of the end away from the gripping part, and the angle of the outer surface relative to the central axis is 17°.
7. The soft sleeve according to claim 6, characterized in that: The thickness of the gripping part colloid at the end away from the collar colloid is 5 times the thickness of the end close to the collar colloid, the angle of the outer surface relative to the central axis is 30°, and the angle of the inner surface relative to the central axis is 9°.
8. The soft sleeve as described in any one of claims 1 to 7 is used for lifting and glazing protection of disc-shaped suspended porcelain insulator dry blanks; the collar colloid of the soft sleeve is set on the porcelain dry blank at a position where the tangent of the arc chamfer of the end portion and the umbrella portion of the porcelain dry blank extends from the starting point of the tangent toward the waist of the end portion of the porcelain dry blank within a range of no more than 15 mm.
9. The soft sleeve described in any one of claims 1 to 7 is used for lifting and glazing protection of rod-shaped porcelain insulator dry blanks; the collar colloid of the soft sleeve is set on the porcelain dry blank at the following position: one soft sleeve is set at the end opposite to the upper umbrella surface, extending from the starting point of the tangent of the arc chamfer of the end of the porcelain dry blank and the umbrella part to the direction of the waist of the end of the porcelain dry blank within a range not exceeding 30 mm; the other soft sleeve is arranged symmetrically with the previous soft sleeve up and down.