Composite insulator and cementing process

Abstract

The composite insulator comprises a hardware fitting component and an isolating ring, the hardware fitting component comprises a wire clamping groove and a steel foot, and the bottom end of the wire clamping groove and the top end of the steel foot are each provided with an assembling hole. A glue overflowing groove is formed in an inlet of the assembly hole; a plurality of constant-pressure openings are formed in one end, far away from a groove opening, of the glue overflowing groove; the isolating ring is installed in the assembling hole and comprises an upper ring, a clamping ring and a lower ring, the upper ring and the lower ring are connected to the upper end and the lower end of the clamping ring respectively, a plurality of glue overflowing holes are formed in the upper end of the ring wall of the upper ring, a blocking piece is connected to the lower end of the ring wall of the lower ring, and the clamping ring is clamped in a notch of the glue overflowing groove and seals the notch when installed. The glue overflowing hole penetrates through the clamping ring, leads to the lower end of the clamping ring from the upper ring and is communicated with the glue overflowing groove when the clamping ring is mounted; according to the invention, the assembly hole structure is designed on the fitting component, and the isolating ring component is introduced, so that the core rod, the fitting component and the silica gel umbrella skirt are integrally formed.

Description

Technical Field

[0001] The invention relates to the technical field of insulator production, in particular to a composite insulator and a gluing process. Background Art

[0002] Composite insulators are an insulating control component consisting of a core rod, a shed and metal components. They are mainly used to support conductors in overhead transmission lines and prevent current from returning to the ground. The core features of composite insulators include light weight, high mechanical strength and excellent pollution flashover resistance, so they are widely used. In the production process of composite insulators, the gluing process belongs to the core connection and structural molding link. The gluing process refers to the bonding of key components of composite insulators, including core rods, metal components, etc., through adhesives, and filling gaps to achieve sealing to prevent interface breakdown or environmental erosion.

[0003] In the traditional production and assembly process of composite insulators, the assembly between the core rod and the hardware components usually adopts the crimping process or the gluing process, that is, the core rod and the hardware components are crimped together by a hydraulic press or glued together with adhesive. After the crimping or gluing is completed, the silicone shed is formed on the outside of the core rod by molding or injection molding. However, the traditional gluing process requires the temperature and curing of each hardware component and the silicone shed to be completed step by step, which is inefficient and time-consuming. Summary of the invention

[0004] In response to the problems raised in the above background technology, the purpose of the present invention is to provide a composite insulator and a gluing process, by designing a new assembly hole structure on the hardware component and introducing an innovatively designed isolation ring component, to achieve integrated molding of the core rod, hardware component and silicone umbrella skirt.

[0005] In order to achieve the above-mentioned purpose, the present invention proposes a composite insulator on one hand. In the technical solution of the present invention, the composite insulator includes a hardware component and an isolation ring. The hardware component includes a wire clamping groove and a steel foot. The bottom end of the wire clamping groove and the top end of the steel foot are both provided with an assembly hole. A glue overflow groove is provided at the entrance of the assembly hole, and the glue overflow groove is provided with a plurality of constant pressure openings at the end away from the notch. The isolation ring is installed in the assembly hole. The isolation ring structure includes an upper ring, a clamping ring and a lower ring. The upper ring and the lower ring are respectively connected to the upper and lower ends of the clamping ring. The upper end of the ring wall of the upper ring is provided with a plurality of glue overflow holes. The lower end of the ring wall of the lower ring is fixedly connected with a baffle. When the clamping ring is installed, it is clamped in the notch of the glue overflow groove and closes the notch. The glue overflow hole passes through the clamping ring from the upper ring to the lower end of the clamping ring and is connected to the glue overflow groove when the clamping ring is installed.

[0006] Preferably, the inner diameters of the upper ring, the retaining ring and the lower ring are the same and aligned, the outer diameter of the upper ring is equal to the inner diameter of the assembly hole, the lower ring is tightly attached to the outer wall of the overflow groove when installed and the baffle blocks the multiple constant pressure openings.

[0007] Preferably, in the technical solution of the present invention, the composite insulator also includes a core rod and a silicone umbrella skirt, the diameter of the core rod is equal to the inner diameter of the upper ring, the clamping ring and the lower ring, and the core rod is glued and fixed in the assembly hole; the silicone umbrella skirt is injection molded on the outside of the core rod.

[0008] Preferably, the upper ring, the clamping ring, the lower ring and the baffle are all made of silicone.

[0009] Another aspect of the present invention further provides a gluing process for assembling a composite insulator as described above, which specifically comprises the following steps: S1. Glue dispensing: install the isolation ring in the assembly hole of the wire clamping groove and the steel foot respectively, and then inject the adhesive into the assembly hole after the installation is completed; S2. Insertion: insert the two ends of the mandrel into the assembly holes of the wire clamping groove and the steel foot respectively; S3, injection molding: placing the mandrel with the hardware components after the insertion into the shed molding mold for injection molding; S4, curing: After the injection molding is completed, the molding mold is heated and cured.

[0010] Preferably, in step S2, during the process of inserting the core rod into the assembly hole, excess adhesive enters the glue overflow groove from the glue overflow hole, and when the air pressure inside the glue overflow groove increases, the baffle is lifted up through the multiple constant pressure openings to release pressure.

[0011] Preferably, in step S4, the temperature rise and curing includes multiple stages of temperature rise, the curing temperature of the adhesive is lower than the curing temperature of the silicone shed, the temperature is first raised to the curing temperature of the adhesive to complete the curing of the adhesive, and then the temperature is raised to the curing temperature of the silicone shed to complete the curing and vulcanization of the silicone shed.

[0012] Beneficial effects: In summary, the present invention provides a composite insulator and a gluing process. In the technical solution of the present invention, a new assembly hole structure is designed on the hardware component, and a glue overflow groove is opened at the opening of the assembly hole to collect the overflow glue during the insertion and bonding process of the composite insulator core rod. At the same time, an innovatively designed isolation ring component is introduced, and the silicone material properties of the isolation ring are used to assist in positioning the core rod during the bonding process. On the other hand, the isolation ring and the silicone baffle are used to close the notch of the glue overflow groove and the constant pressure opening. Under the action of air pressure and the silicone material of the baffle, the constant pressure opening can also achieve a pressure relief function.

[0013] Other features and advantages of the present invention will be set forth in the description which follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following is a brief introduction to the drawings according to the embodiments of the present invention.

[0015] Figure 1 is a schematic diagram of the overall structure of a composite insulator according to an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a hardware component according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the cross-section structure of a hardware component according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the cross-section structure of a wire clamping groove according to an embodiment of the present invention; Figure 5 is a schematic diagram of a cross-sectional structure of a steel foot according to an embodiment of the present invention; Figure 6 Schematic diagram of the structure of the isolation ring according to an embodiment of the present invention Figure 1 ; Figure 7 Schematic diagram of the structure of the isolation ring according to an embodiment of the present invention Figure 2 ; Figure 8 is a schematic diagram of a cross-sectional structure of an isolation ring according to an embodiment of the present invention; Fig. 9 A schematic diagram of the installation structure of an isolation ring according to an embodiment of the present invention; Fig.10 It is a cross-sectional schematic diagram of the installation structure of the isolation ring according to an embodiment of the present invention; Fig.11 It is a structural schematic diagram of a core rod and a silicone shed according to an embodiment of the present invention; Fig.12 is a flow chart of a binding process according to an embodiment of the present invention; In the figure: A, composite insulator; A01, wire clamping groove; A02, steel foot; A03, isolation ring; A04, core rod; A05, silicone shed; B1, assembly hole; B2, overflow groove; B3, constant pressure opening; B4, upper ring; B5, clamping ring; B6, lower ring; B7, overflow hole; B8, baffle. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings according to the embodiments of the present invention.

[0017] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a composite insulator according to an embodiment of the present invention. Figure 1As shown, an embodiment of the present invention includes a composite insulator A. Specifically, in this embodiment, the composite insulator A includes a hardware component and an isolation ring A03.

[0018] Figure 2 is a schematic diagram of the structure of a hardware component according to an embodiment of the present invention, such as Figure 2 As shown, the hardware component includes a wire clamping groove A01 and a steel leg A02. The bottom end of the wire clamping groove A01 and the top end of the steel leg A02 are both provided with an assembly hole B1. The assembly hole B1 is used for the plug-in assembly process of the composite insulator A, that is, by injecting adhesive into the assembly hole B1, the composite insulator A is bonded and assembled. It should be noted that Figure 3 FIG. 1 is a schematic diagram of a cross-sectional structure of a hardware component according to an embodiment of the present invention. Figure 3 As shown, the assembly hole B1 at the bottom of the wire clamping groove A01 and the assembly hole B1 at the top of the steel foot A02 are symmetrical in the horizontal direction. Figure 4 and Figure 5 They are schematic cross-sectional structures of the wire clamping groove A01 and the steel foot A02 according to an embodiment of the present invention, as shown in Figure 4 and Figure 5 As shown, in this embodiment, a glue overflow groove B2 is provided at the entrance of the assembly hole B1 in the wire clamping groove A01 and the steel leg A02, and a plurality of constant pressure openings B3 are provided at the end of the glue overflow groove B2 away from the groove. The glue overflow groove B2 collects excess adhesive in the assembly hole B1 during the insertion and assembly process of the composite insulator A.

[0019] Figure 6 and Figure 7 This is a schematic diagram of the structure of the isolation ring A03 according to an embodiment of the present invention. Figure 6 and Figure 7 In this embodiment, the isolation ring A03 structure includes an upper ring B4, a snap ring B5 and a lower ring B6. The upper ring B4 and the lower ring B6 are respectively connected to the upper and lower ends of the snap ring B5. The inner diameters of the upper ring B4, the snap ring B5 and the lower ring B6 are the same and aligned. The outer diameter of the upper ring B4 is equal to the inner diameter of the assembly hole B1. A plurality of overflow holes B7 are provided at the upper end of the ring wall of the upper ring B4. A baffle B8 is fixedly connected to the lower end of the ring wall of the lower ring B6. The upper ring B4, the snap ring B5, the lower ring B6 and the baffle B8 are all made of silicone. Figure 8 FIG. 1 is a schematic diagram of a cross-sectional structure of an isolation ring A03 according to an embodiment of the present invention, wherein Figure 8 As shown, the overflow hole B7 passes through the clamp ring B5 from the upper ring B4 to the lower end of the clamp ring B5. Fig. 9 and Fig.10 FIG. 1 is a schematic diagram of the installation structure of the isolation ring according to an embodiment of the present invention. Fig. 9 and Fig.10As shown, in this embodiment, the isolation ring A03 is installed in the assembly hole B1, and the clamping ring B5 is clamped in the notch of the overflow glue groove B2 and closes the notch when it is installed. The overflow glue hole B7 is connected to the overflow glue groove B2 when the clamping ring B5 is installed, that is, during the plug-in assembly process of the composite insulator A, the excess adhesive in the assembly hole B1 enters the overflow glue groove B2 through the overflow glue hole B7, and the lower ring B5 is tightly attached to the outer wall of the overflow glue groove B2 during installation, and the baffle B8 blocks the multiple constant pressure openings B3. It should be noted that in the process of the adhesive entering the overflow glue groove B2 through the overflow glue hole B7, the inside of the overflow glue groove B2 is affected by the entry of the adhesive, resulting in an increase in the gas pressure in the overflow glue groove B2. When the air pressure increases to a threshold value, the baffle B8 that blocks the constant pressure opening B3 is lifted up through the multiple constant pressure openings B3. Since the baffle B8 is made of silicone, the threshold value of the increase in air pressure is affected by the material of the baffle B8.

[0020] Specifically, in this embodiment, Fig.11 Schematic diagram of the structure of the core rod A04 and the silicone shed A05 according to an embodiment of the present invention. Fig.11 As shown, the composite insulator A of this embodiment further includes a core rod A04 and a silicone shed A05.

[0021] Among them, the diameter of the core rod A04 is equal to the inner diameter of the upper ring B4, the clamping ring B5 and the lower ring B6. The core rod A04 is fixed in the assembly hole B1 by bonding during installation, that is, after the adhesive is injected into the inside of the assembly hole B1, the core rod A04 is inserted for bonding assembly. Since the diameter of the core rod A04 is equal to the inner diameter of the upper ring B4, the clamping ring B5 and the lower ring B6, the core rod A04 is supported by the isolation ring A03 when inserted, that is, the inner walls of the upper ring B4, the clamping ring B5 and the lower ring B6 support and position the core rod A04. The core rod A04 can be located at the center of the assembly hole B1 during the insertion process. Compared with the insertion and bonding process of the traditional process, this embodiment is more convenient for the insertion and positioning of the core rod A04; the silicone umbrella skirt A05 is injection molded on the outside of the core rod A04, that is, the core rod A04 with the hardware component after the insertion is completed is placed in the molding mold of the silicone umbrella skirt A05 for injection molding.

[0022] This embodiment also includes a gluing process for assembling a composite insulator A as described above. Fig.12 FIG. 1 is a flow chart of a binding process according to an embodiment of the present invention. Fig.12 As shown, a binding process in this embodiment specifically includes the following steps: S1, glue dispensing: install the isolation ring A03 in the assembly hole B1 of the wire clamping groove A01 and the steel foot A02 respectively, and then inject adhesive into the assembly hole B1 after the installation is completed. The amount of the injected adhesive is adjusted according to the glue overflow after the core rod A04 is inserted, so that the adhesive overflowing into the glue overflow groove B2 through the glue overflow hole B7 does not exceed the effective volume of the glue overflow groove B2; S2. Insertion: insert the two ends of the mandrel A04 into the assembly hole B1 of the wire clamping groove A01 and the steel foot A02 respectively. It should be noted that the mandrel A04 is inserted into the assembly hole B1 of the wire clamping groove A01 and the steel foot A02 from top to bottom, that is, the wire clamping groove A01 is inverted and the two ends of the mandrel A04 are sequentially inserted into the wire clamping groove A01 and the steel foot A02 at non-simultaneous times. Since the diameter of the mandrel A04 is equal to the inner diameters of the upper ring B4, the clamping ring B5 and the lower ring B6, that is, when the mandrel A04 is inserted, the assembly hole B1 is closed, and the gas and adhesive inside the assembly hole B1 are squeezed and discharged from the overflow hole B7. At the same time, under the action of gravity, the gas first enters the overflow groove B2 from the overflow hole B7, and then the excess The adhesive enters the overflow groove B2 from the overflow hole B7. At the same time, when the gas and adhesive enter the overflow groove B2, the internal air pressure of the overflow groove B2 increases and the baffle B8 is lifted up through the multiple constant pressure openings B3 to release the pressure. It should be noted that the opening direction of the multiple constant pressure openings B3 and the setting direction of the baffle B8 are downward along the assembly hole B1. Therefore, when the core rod A04 is inserted into the assembly hole B1, it will not cause resistance to the constant pressure opening B3 and the baffle B8. When the core rod A04 is inserted, the notch of the overflow groove B2 will be resisted, which is beneficial to the sealing of the notch of the overflow groove B2. At the same time, affected by the silicone material of the baffle B8, the baffle B8 will resume covering the constant pressure opening B3 under the action of its own elastic properties after the pressure is released. S3, injection molding: placing the mandrel A04 with the hardware components after the insertion into the molding mold of the silicone shed A05 for injection molding; S4, curing: after the injection molding is completed, the molding mold is heated and cured. The heating and curing includes multiple stages of heating. The curing temperature of the adhesive is lower than the curing temperature of the silicone shed A05. First, the temperature is raised to the curing temperature of the adhesive to complete the curing of the adhesive, and then the temperature is raised to the curing temperature of the silicone shed A05 to complete the curing and vulcanization of the silicone shed A05. Compared with the separate curing of the traditional process, this embodiment adopts the integrated molding of the core rod A04, the hardware component and the silicone shed A05, that is, the core rod A04 and the hardware component and the silicone shed A05 are assembled as a whole through a heating and curing process.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A composite insulator, characterized in that: include: The hardware component includes a wire clamping groove and a steel foot, wherein the bottom end of the wire clamping groove and the top end of the steel foot are both provided with an assembly hole, an overflowing glue groove is provided at the entrance of the assembly hole, and the overflowing glue groove is provided with a plurality of constant pressure openings at one end away from the groove; An isolation ring is installed in the assembly hole. The isolation ring structure includes an upper ring, a clamping ring and a lower ring. The upper ring and the lower ring are respectively connected to the upper and lower ends of the clamping ring. A plurality of glue overflow holes are provided at the upper end of the ring wall of the upper ring. A baffle is fixedly connected to the lower end of the ring wall of the lower ring. When the clamping ring is installed, it is clamped in the notch of the glue overflow groove and closes the notch. The glue overflow hole passes through the clamping ring from the upper ring to the lower end of the clamping ring and is connected to the glue overflow groove when the clamping ring is installed.

2. A composite insulator according to claim 1, characterized in that: The inner diameters of the upper ring, the retaining ring and the lower ring are the same and aligned, the outer diameter of the upper ring is equal to the inner diameter of the assembly hole, the lower ring is tightly attached to the outer wall of the overflow groove when installed and the baffle blocks the multiple constant pressure openings.

3. A composite insulator according to claim 2, characterized in that: Also includes: A core rod, the diameter of which is equal to the inner diameters of the upper ring, the clamping ring and the lower ring, and is adhesively fixed in the assembly hole; The silicone umbrella skirt is injection-molded on the outside of the core rod.

4. A composite insulator according to claim 3, characterized in that: The upper ring, the clamping ring, the lower ring and the baffle are all made of silicone.

5. A gluing process for assembling a composite insulator as claimed in claim 4, characterized in that: The specific steps include: S1. Glue dispensing: install the isolation ring in the assembly hole of the wire clamping groove and the steel foot respectively, and then inject the adhesive into the assembly hole after the installation is completed; S2. Insertion: insert the two ends of the mandrel into the assembly holes of the wire clamping groove and the steel foot respectively; S3, injection molding: placing the mandrel with the hardware components after the insertion into the shed molding mold for injection molding; S4, curing: After the injection molding is completed, the molding mold is heated and cured.

6. A binding process according to claim 5, characterized in that: In the step S2, when the core rod is inserted into the assembly hole, excess adhesive enters the adhesive overflow groove from the adhesive overflow hole. When the air pressure inside the adhesive overflow groove increases, the baffle is lifted up through the multiple constant pressure openings to release the pressure.

7. The binding process according to claim 5, characterized in that: In step S4, the temperature rise and curing includes multiple stages of temperature rise, the curing temperature of the adhesive is lower than the curing temperature of the silicone shed, the temperature is first raised to the curing temperature of the adhesive to complete the curing of the adhesive, and then the temperature is raised to the curing temperature of the silicone shed to complete the curing and vulcanization of the silicone shed.

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