Pre-cementing device and method for high-reliability suspension type porcelain insulator

Abstract

The invention discloses a pre-cementing device and method for a high-reliability suspension type porcelain insulator, the pre-cementing device and method are used for pre-cementing of a steel leg of the suspension type porcelain insulator mainly composed of a steel cap, the steel leg and a porcelain body, the pre-cementing device for the steel leg comprises a maintenance frame (1) and at least one glue injection mold (2), the maintenance frame (1) comprises a platform (11) and a steel leg supporting plate (12) parallel to the platform (11); a stepped hole (13) matched with the bottom of the glue injection mold (2) is formed in the platform (11); the glue injection mold (2) comprises a glue injection port (21), a columnar cavity (22) and a limiting hole (23) matched with a steel foot; and the glue injection mold (2) is a combined mold formed by combining at least two parts. According to the method, the suspension porcelain insulator with extremely high precision can be obtained, the process is controllable, and the production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0002] The present application relates to the technical field of porcelain insulator preparation, in particular to a high-reliability suspension porcelain insulator pre-gluing device and method. BACKGROUND

[0003] Suspension insulators play an important role in overhead transmission lines, and are usually made of glass or porcelain. Suspension insulators are devices installed between conductors at different potentials or between conductors and ground potential components, capable of withstanding voltage and mechanical stress, and are usually composed of three parts: a steel cap, a steel foot, and a porcelain body, which are glued together by a cement adhesive.

[0004] The suspension insulator gluing process is the process of connecting the steel cap, porcelain body, and steel foot using cement. During the gluing process, the geometric centers of the steel cap, porcelain body, and steel foot must be located on the same axis. This step is usually manually operated, and the centering is judged by the naked eye. Through experimental verification, if the above three different centering degrees exceed 1mm, the mechanical performance of the product will decrease by about 10%, and the greater the eccentricity, the more the performance will decrease. Even it can lead to the product unqualified.

[0005] To solve this problem, some manufacturers use automatic equipment for gluing. The initial positioning can effectively ensure the concentricity of the three. However, due to the need for a certain time for cement setting, the radial gap between the installation cavities of the steel cap, steel foot, and porcelain body is relatively large. Before reaching the setting time, a slight external force, such as shaking during the handling process, will cause the steel foot to shift and affect the eccentricity. Since the initial setting time of the cement is more than 2 hours, it is impossible to keep the suspension insulator stationary during production until the cement is initially set. The movement of the steel foot during production and handling is random, which greatly affects the product quality. SUMMARY

[0006] The present application aims to at least partially overcome the above technical problems and / or other potential problems in the prior art: to provide a high-reliability suspension porcelain insulator pre-gluing device and method, which can obtain a suspension porcelain insulator with extremely high precision and controllable process, greatly improving production efficiency.

[0007] The technical solution of the present application is as follows: a suspension porcelain insulator steel foot pre-gluing device for pre-gluing the steel foot of a suspension porcelain insulator mainly composed of a steel cap, a steel foot, and a porcelain body, the steel foot pre-gluing device comprising a curing rack and at least one glue injection mold, the curing rack comprising a platform and a steel foot supporting plate parallel to the platform; the platform is provided with a stepped hole matched with the bottom of the glue injection mold; the glue injection mold comprises a glue injection port, a columnar cavity, and a limiting hole matched with the steel foot; the glue injection mold is a combined mold composed of at least two parts.

[0008] As an optimization, the distance between the steel foot supporting plate and the platform is adjustable.

[0009] As an optimization, the stepped hole, the columnar cavity and the limiting hole are coaxially arranged.

[0010] As an optimization, the glue injection mold is a combined mold composed of two parts A and B, and the parting surface passes through the axis of the columnar cavity.

[0011] As an optimization, the two parts A and B of the glue injection mold are attracted by a magnetic field.

[0012] As an optimization, the top of the glue injection mold is provided with an exhaust hole.

[0013] As an optimization, the two parts A and B of the glue injection mold are respectively provided with a combined positioning structure. The combined positioning structure is a protrusion and a groove matched with each other.

[0014] As an optimization, the bottom of the glue injection mold is fixed by magnetic attraction after cooperating with the stepped hole.

[0015] As an optimization, the inner diameter of the columnar cavity is 1-2mm smaller than the inner diameter of the steel foot mounting cavity of the porcelain body.

[0016] As an optimization, the depth of the limiting hole is 0.5-2cm.

[0017] As an optimization, the glue injection port is arranged at the top of the glue injection mold, and the limiting hole is arranged at the bottom of the glue injection mold.

[0018] As an optimization, the limiting hole wall is coated with a flexible coating. The flexible coating is a rubber layer or a silicone layer, and the thickness is 0.2-0.5mm.

[0019] The application also provides a method for pre-gluing a high-reliability suspension porcelain insulator by using the steel foot pre-gluing device, which comprises the following steps: 1) First, place the maintenance frame on a horizontal surface, keep the platform surface perpendicular to the horizontal surface, then separate the glue injection mold into two parts A and B along the parting surface, put the glue injection end of the steel foot into the columnar cavity of the part A, then magnetically attract and fix the part A to the stepped hole, keep the parting surface of the part A upward; 2) Adjust the distance between the steel foot supporting plate and the platform, ensure that the depth of the steel foot inserted into the columnar cavity meets the requirements, then fix the steel foot supporting plate; then magnetically attract and combine the part B with the parts A and the stepped hole, at this time, the limiting hole wall and the outer wall of the steel foot are coaxially sealed and cooperated; 3) Place the curing frame on the horizontal plane, keep the platform surface parallel to the horizontal plane, inject cement adhesive into the glue injection port, and after the cement adhesive is solidified and cured, remove the glue injection mold to obtain a pre-cast body of steel foot and cement; 4) Apply a layer of styrene-butadiene cement mortar on the steel foot installation cavity of the porcelain body and / or the outer surface of the pre-cast body, then insert the pre-cast body into the steel foot installation cavity to complete the steel foot installation.

[0020] The beneficial effects of the present application are as follows: The present application uses a self-made pre-gluing device to pre-glue the steel foot and cement in the gluing process, which can efficiently and batch-wise prepare the pre-cast body of steel foot and cement with an outer diameter that differs from the inner diameter of the porcelain body steel foot installation cavity by 1-2 mm. After insertion and cooperation, the theoretical coaxiality is between 0-1 mm, which is a substantial improvement compared to ordinary gluing process. The combination between the precast part and the porcelain body uses styrene-butadiene cement mortar, also known as styrene-butadiene emulsion modified cement mortar, which has a core drilling and pulling adhesion strength of up to 1.72, and the failure mode is non-interface failure, fully meeting the strength requirements of insulator gluing.

[0021] Compared with the traditional gluing process, the present application greatly simplifies the gluing process, uses mold casting method, and obtains highly precise cement precast parts through large-scale precast steel foot-cement precast parts, and the process is controllable and easy to realize automatic production, improving labor efficiency. After using the precast part for gluing, the coaxiality between the steel foot and the porcelain body can be controlled between 0-1 mm, greatly improving the gluing precision, reducing the strength dispersion of the suspension insulator product as a whole, and solving a difficult problem in the gluing process. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a sectional view of a suspension porcelain insulator in the prior art.

[0023] Figure 2 is a steel foot deflection structure schematic diagram of a suspension porcelain insulator in the prior art.

[0024] Figure 3 is a partial sectional view of the steel foot pre-gluing device of the suspension porcelain insulator in Example 1.

[0025] Figure 4 is a top view structure schematic diagram of the curing frame in Example 1.

[0026] Figure 5 is a steel foot pre-gluing device application structure schematic diagram of the suspension porcelain insulator in Example 1.

[0027] Figure 6 is a top view structure schematic diagram of the glue injection mold composed of A and B in Example 1.

[0028] Figure 7 The diagram shows the main view and cross-sectional view of part A of the injection mold in Example 1.

[0029] Figure 8 This is a schematic diagram of the structure of the suspension porcelain insulator prepared in Example 2.

[0030] In the diagram: 1. Curing frame; 11. Platform; 12. Steel foot support plate; 13. Step hole; 2. Injection mold; 21. Injection port; 22. Columnar cavity; 23. Limiting hole; 24. Vent hole; 25. Combined positioning structure. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to specific embodiments, but the present invention is not limited to the following specific embodiments.

[0032] Example 1 This embodiment combines Figures 1-8 Describes a pre-adhesive mounting device for the steel feet of a suspension porcelain insulator, used for, etc. Figure 1 The steel feet of the suspension porcelain insulator shown are pre-glued, mainly consisting of a steel cap, steel feet, and a porcelain body. Figure 2 As shown, because the radial gap between the steel foot and the ceramic body is larger than that between the steel cap and the ceramic body, before the setting time is reached, a slight external force, such as shaking during transportation, can cause the steel foot to shift, thus affecting the eccentricity and easily producing a large deflection angle 'a', resulting in product defects.

[0033] The steel foot pre-adhesive fitting device includes a curing frame 1 and 10 glue injection molds 2, such as Figure 4 As shown, the maintenance frame 1 includes a platform 11 and a steel foot support plate 12 parallel to the platform 11; the platform 11 is provided with a stepped hole 13 that mates with the bottom of the glue injection mold 2; the glue injection mold 2 includes a glue injection port 21, a columnar cavity 22 and a limiting hole 23 that mates with the steel foot; the glue injection mold 2 is a combined mold composed of at least two parts.

[0034] The distance between the steel foot support plate 12 and the platform 11 is adjustable, which is used to adjust the depth of the steel foot extending into the cylindrical cavity 22. The steel foot support plate 12 can be slid relative to the support foot of the maintenance frame 1 using a sliding groove and positioning pin, and fixed by the positioning pin, or other threaded telescopic adjustment structures can be used. This invention does not limit the adjustment structure; any existing adjustment structure is within the scope of protection of this invention.

[0035] The stepped hole 13, the columnar cavity 22, and the limiting hole 23 are coaxially arranged.

[0036] The injection mold 2 is a combination mold composed of two parts, A and B, and its parting surface passes through the axis of the columnar cavity 22.

[0037] The two parts A and B of the glue injection mold 2 are attracted by magnetic field. Specifically, the two parts A and B can be made of permanent magnet material, or the attracting surfaces of the two parts A and B are respectively pre-embedded with permanent magnets that attract each other.

[0038] Figure 7 The left part of the middle figure is a schematic diagram of the front structure of the part A, and the right part is a schematic diagram of the section structure of the part A, as shown in Figure 7 As shown in the right part, the part A of the glue injection mold is provided with an exhaust hole at the top, which is used to exhaust the gas in the columnar cavity 22 during glue injection.

[0039] Combined with Figure 6 And Figure 7 As shown in the left part, the two parts A and B of the glue injection mold are respectively provided with combined positioning structures, which are used for positioning the combined glue injection mold. The combined positioning structure is four pairs of protrusions and grooves that cooperate with each other. Figure 7 The part A of the left part of the middle figure is provided with two hemispherical grooves and two hemispherical protrusions, wherein the two grooves are arranged on the parting surface of the left side wall of the part A, and the two protrusions are arranged on the parting surface of the right side wall of the part A. The part B is provided with protrusions that are embedded with the grooves of the part A at the corresponding positions, and grooves that are embedded with the protrusions.

[0040] The bottom of the glue injection mold 2 is fixed by magnetic field attraction after cooperating with the stepped hole 13. The stepped hole 13 can be made of ferromagnetic material to attract the glue injection mold 2 made of permanent magnet material, or the bottom of the glue injection mold 2 is pre-embedded with permanent magnets to realize magnetic attraction fixation.

[0041] The inner diameter of the columnar cavity 22 is 1-2 mm smaller than the inner diameter of the steel leg mounting cavity of the porcelain body.

[0042] The depth of the limiting hole 23 is 0.5-2 cm.

[0043] The glue injection hole 21 is arranged at the top of the glue injection mold 2, and the limiting hole 23 is arranged at the bottom of the glue injection mold 2.

[0044] The hole wall of the limiting hole 23 is coated with a rubber layer with a thickness of 0.2 mm. It is used for sealing the hole wall of the limiting hole 23 and the outer wall of the steel leg, so as to avoid glue leakage.

[0045] Example 2 This embodiment describes a method for pre-gluing high-reliability suspension porcelain insulators by using the steel leg pre-gluing device of example 1, which comprises the following steps: 1) First, put the maintenance frame 1 side on the horizontal plane, keep the platform 11 surface perpendicular to the horizontal plane, then separate the glue injection mold 2 into two parts A and B along the parting surface, put the glue injection end of the steel foot into the columnar cavity 22 of part A, then magnetically fix part A with the stepped hole 13, keep the parting surface of part A upward, as shown in Figure 3 ; 2) Adjust the distance between the steel foot supporting plate 12 and the platform 11, ensure that the depth of the steel foot inserted into the columnar cavity 22 reaches the distance between the glue injection end surface of the steel foot and the top of the columnar cavity 22 is 2-4mm, then fix the steel foot supporting plate 12; then magnetically combine part B with part A and the stepped hole 13, at this time the limiting hole 23 hole wall and the steel foot outer wall coaxial sealing fit; 3) Put the maintenance frame 1 right on the horizontal plane, keep the platform 11 surface parallel to the horizontal plane, inject cement adhesive into the glue injection port 21, after the cement adhesive completely solidifies, remove the glue injection mold 2, get the pre-poured body of steel foot and cement; 4) Apply a layer of commercially available butyl cement mortar on the steel foot installation cavity of the porcelain body and / or the outer surface of the pre-poured body of cement, then insert the pre-poured body into the steel foot installation cavity to complete the steel foot installation, then install the steel cap using conventional process, after the butyl cement mortar solidifies, get high reliability suspension porcelain insulator.

[0046] In step 4), the steel cap can also be installed first according to the conventional process, then the steel foot is installed. The depth of the limiting hole 23 is 0.5-2cm, which can constrain the steel foot to be coaxial with the columnar cavity 22. As shown in Figure 8 , the glue injection end surface of the steel foot in the prior art is also provided with a buffer pad.

[0047] The above is only a characteristic implementation example of the present application, which does not constitute any limitation on the protection scope of the present application. Any technical solution formed by equivalent exchange or equivalent replacement falls within the protection scope of the present application.

Claims

1. A pre-adhesive mounting device for the steel feet of a suspension porcelain insulator, characterized in that, For the pre-adhesive bonding of steel feet in suspension porcelain insulators mainly composed of steel caps, steel feet and porcelain bodies, the pre-adhesive bonding device for steel feet includes a curing frame (1) and at least one injection mold (2). The curing frame (1) includes a platform (11) and a steel foot support plate (12) parallel to the platform (11). The platform (11) is provided with a stepped hole (13) that mates with the bottom of the injection mold (2). The injection mold (2) includes an injection port (21), a columnar cavity (22) and a limiting hole (23) that mates with the steel foot. The injection mold (2) is a combined mold composed of at least two parts.

2. The pre-adhesive mounting device for the steel feet of the suspension porcelain insulator according to claim 1, characterized in that, The distance between the steel foot support plate (12) and the platform (11) is adjustable.

3. The pre-adhesive mounting device for the steel feet of the suspension porcelain insulator according to claim 2, characterized in that, The stepped hole (13), the columnar cavity (22), and the limiting hole (23) are coaxially arranged.

4. The pre-adhesive mounting device for the steel feet of the suspension porcelain insulator according to claim 3, characterized in that, The injection mold (2) is a combination mold composed of two parts, A and B, and its parting surface passes through the axis of the columnar cavity (22).

5. The pre-adhesive mounting device for the steel feet of the suspension porcelain insulator according to claim 4, characterized in that, The two components A and B of the injection mold (2) are attracted together by a magnetic field.

6. The pre-adhesive bonding device for the steel foot of the suspension porcelain insulator according to claim 5, characterized in that, The top of the injection mold (2) is provided with an air vent (24).

7. The pre-adhesive mounting device for the steel foot of the suspension porcelain insulator according to claim 6, characterized in that, The injection mold (2) has two components, A and B, respectively equipped with a combined positioning structure (25), which consists of a protrusion and a groove that cooperate with each other.

8. The pre-adhesive mounting device for the steel foot of the suspension porcelain insulator according to claim 7, characterized in that, The bottom of the injection mold (2) is fixed by magnetic attraction after it is engaged with the stepped hole (13); the inner diameter of the columnar cavity (22) is 1-2 mm smaller than the inner diameter of the steel foot mounting cavity of the ceramic body; the depth of the limiting hole (23) is 0.5-2 cm.

9. The pre-adhesive mounting device for the steel feet of a suspension porcelain insulator according to claim 8, characterized in that, The injection port (21) is located at the top of the injection mold (2), and the limiting hole (23) is located at the bottom of the injection mold (2); the wall of the limiting hole (23) is coated with a flexible coating.

10. A method for pre-adhesive bonding of high-reliability suspension porcelain insulators using the steel-foot pre-adhesive bonding device according to any one of claims 1-9, characterized in that, Includes the following steps: 1) First, place the curing frame (1) on the horizontal surface and keep the surface of the platform (11) perpendicular to the horizontal surface. Then, separate the injection mold (2) into two parts, A and B, along the parting surface. After inserting the injection end of the steel foot into the columnar cavity (22) of part A, fix part A to the stepped hole (13) magnetically, keeping the parting surface of part A facing upward. 2) Adjust the distance between the steel foot support plate (12) and the platform (11) to ensure that the steel foot extends into the columnar cavity (22) to the required depth and then fix the steel foot support plate (12); then magnetically combine the B component with the A component and the stepped hole (13), at which time the wall of the limiting hole (23) and the outer wall of the steel foot are coaxially sealed. 3) Place the curing frame (1) on a horizontal surface, keep the surface of the platform (11) parallel to the horizontal surface, inject cement adhesive into the injection port (21), and after the cement adhesive has solidified and cured, remove the injection mold (2) to obtain a precast body made of steel feet and cement. 4) Apply a layer of styrene-butadiene cement mortar to the steel foot mounting cavity of the ceramic body and / or the cement outer surface of the precast body, and then insert the precast body into the steel foot mounting cavity to complete the steel foot installation.

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