Combined insulator capable of being replaced independently

Abstract

The utility model discloses a combined insulator capable of being replaced independently, which comprises a plurality of groups of insulators which are connected end to end in a chain manner, the insulator positioned at the top is fixedly connected with an upper mounting seat, the insulator positioned at the bottom is fixedly connected with a lower mounting seat, and each insulator comprises a metal core rod. The outer wall of the metal core rod is selectively and fixedly connected with an insulating sleeve, the metal core rod comprises an upper connecting shaft, the lower end of the upper connecting shaft is fixedly connected with a lower connecting shaft, an inner cavity of the lower connecting shaft is slidably connected with a locking assembly, and the upper connecting shaft and the adjacent lower connecting shaft are used for fixedly connecting two adjacent groups of insulators. According to the utility model, through the arrangement of the insulators, the metal core rod and the insulation sleeve are fixed while the two adjacent groups of insulators are connected in series, thereby greatly improving the convenience of disassembly and assembly, and reducing the material loss during replacement at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of insulators, in particular to an independently replaceable combined insulator. Background Art

[0002] Insulators are used for insulation and fixing conductors in high-voltage overhead transmission and distribution lines. They are generally assembled into insulator strings for use on lines of different voltage levels. Insulators are divided into two types: ordinary type and pollution-resistant type according to their use environment and region. Ordinary insulators are suitable for general areas. If the number of insulators is appropriately increased, the flashover performance can be improved. Pollution-resistant insulators are divided into bell-shaped type and double-layer umbrella-shaped type according to their umbrella-shaped structure. Pollution-resistant insulators are suitable for industrial dust, chemical, saline-alkali, coastal and foggy areas.

[0003] After searching, the application number CN202321549432.9 discloses a combined butterfly-type high-voltage porcelain insulator, including an insulator and a connecting frame, a fixed seat is installed on the upper end of the insulator and an externally threaded seat is installed on the lower end, the upper end of the fixed seat is rotatably installed on the vertical plane to mount the connecting frame, and the lower end of the connecting frame is rotatably installed on the vertical plane to mount the connecting frame, a first clamp is installed in the lower end of the connecting frame and the first clamp is movable up and down and inserted into the fixed seat, and an internally threaded mounting seat is fixedly installed on the upper end of the connecting frame, so that the insulator can be installed in combination and the scope of application is expanded.

[0004] The insulator consists of two parts: a ceramic matrix and an iron core. The iron core is responsible for supporting and fixing the ceramic matrix to ensure the stability and durability of the insulator. The existing insulators are cast in one piece, so they need to be replaced as a whole when damaged, and the ceramic matrix needs to be broken during the replacement process, which not only wastes resources but also poses certain safety hazards to high-altitude workers. Utility Model Content

[0005] The purpose of the utility model is to provide a combined insulator that can be replaced independently to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides an independently replaceable combined insulator, comprising a plurality of groups of insulators connected end to end in a chain-like manner, wherein the insulator located at the top is fixedly connected to an upper mounting seat, and the insulator located at the bottom is fixedly connected to a lower mounting seat, the insulator comprises a metal core rod, an insulating sleeve is fixedly connected to the outer wall of the metal core rod, the metal core rod comprises an upper connecting shaft, a lower connecting shaft is fixedly connected to the lower end of the upper connecting shaft, a locking assembly is slidably connected to the inner cavity of the lower connecting shaft, and the upper connecting shaft and the lower connecting shaft of an adjacent group are used to fixedly connect two adjacent groups of insulators.

[0007] As a further preference, the insulating sleeve includes a ceramic mother body, an upper mounting groove is opened on the top of the ceramic mother body, a lower mounting groove is opened on the bottom of the ceramic mother body, the lower mounting groove is connected to the upper mounting groove, and the upper connecting shaft and the lower connecting shaft are respectively slidably connected in the upper mounting groove and the lower mounting groove.

[0008] As a further preference, the outer wall of the upper connecting shaft is provided with an external thread, and the inner wall of the lower connecting shaft is provided with an internal thread, and the internal thread matches the external thread.

[0009] As a further preference, three groups of sliding grooves are spaced apart on the outer wall of the lower connecting shaft, and the locking component partially passes through the sliding grooves and extends to the outside of the lower connecting shaft.

[0010] As a further preference, the locking assembly includes a slide plate, three groups of mounting grooves are spaced apart on the outer edge of the upper end of the slide plate, a connecting rod is fixedly connected in the mounting groove, a positioning block is fixedly connected to the connecting rod on the side facing away from the slide plate, an elastic assembly is fixedly connected to the upper end surface of the slide plate, and the elastic assembly is fixedly connected to the top of the inner cavity of the lower connecting shaft on the side facing away from the slide plate.

[0011] As a further preference, a guide groove is provided on the side wall of the lower placement groove, and three groups of positioning grooves are provided at intervals on the top of the guide groove. The positioning grooves have the same shape and size as the positioning blocks.

[0012] Through the above technical solution, the independently replaceable combined insulator provided by the utility model has the following benefits:

[0013] The utility model provides an insulator, inserts the upper connecting shaft into the lower end of the adjacent group of lower connecting shafts, and connects the two adjacent groups of metal core rods through the cooperation of the external thread and the internal thread. When the upper connecting shaft moves upward along the internal thread inside the lower connecting shaft, the slide plate is pushed to move upward along the inner wall of the lower connecting shaft. At the same time, the three groups of connecting rods drive the positioning block to move upward along the slide groove. The positioning block moves along the guide groove until the positioning block is guided into the positioning groove by the guide groove. At this time, the positioning block cooperates with the positioning groove to fix the ceramic matrix to the outer wall of the lower connecting shaft. At the same time, the positioning block is inserted into the positioning groove to play a limiting role, so as to avoid deflection of the external thread and the internal thread when subjected to external force. The metal core rod and the insulating sleeve are fixed while the two adjacent groups of insulators are connected in series, which greatly improves the convenience of disassembly and assembly, and reduces the material loss during replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of the structure of the independently replaceable combined insulator.

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the insulator of the utility model.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the insulating sleeve of the utility model.

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the insulating core rod of the utility model.

[0018] Figure 5 This is a schematic diagram of the locking assembly structure of the utility model.

[0019] In the figure: 1 upper mounting seat, 2 lower mounting seat, 3 insulator, 31 metal core rod, 311 external thread, 312 upper connecting shaft, 313 lower connecting shaft, 314 locking assembly, 3141 positioning block, 3142 slide plate, 3143 mounting groove, 3144 elastic assembly, 3145 positioning hole, 3146 connecting rod, 315 slide groove, 316 internal thread, 32 insulating sleeve, 321 upper mounting groove, 322 guide groove, 323 ceramic matrix, 324 positioning groove, 325 lower mounting groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The utility model is further described in detail with reference to the accompanying drawings.

[0022] See also Figure 1 - Figure 5 , which is an independently replaceable combined insulator provided by the utility model, comprises an upper mounting seat 1, a lower mounting seat 2 and a plurality of groups of insulators 3.

[0023] Among them, see Figure 1 - Figure 2 Several groups of insulators 3 are connected end to end in a chain-like manner, and the insulator 3 at the top is fixedly connected to the upper mounting seat 1, and the insulator 3 at the bottom is fixedly connected to the lower mounting seat 2. The insulator 3 includes a metal core rod 31, and the outer wall of the metal core rod 31 is detachably connected to an insulating sleeve 32. The installation of two adjacent groups of insulators 3 is achieved by connecting two adjacent groups of metal core rods 31 to each other.

[0024] It should be noted that the upper mounting seat 1 and the lower mounting seat 2 are all detachably connected to the insulator 3 .

[0025] For details, please refer to Figure 3 - Figure 5In order to realize the fixed connection between the metal core rod 31 and the insulating sleeve 32, the insulating sleeve 32 includes a ceramic matrix 323, an upper receiving groove 321 is provided on the top of the ceramic matrix 323, a lower receiving groove 325 is provided on the bottom of the ceramic matrix 323, the lower receiving groove 325 is connected to the upper receiving groove 321, a guide groove 322 is provided on the side wall of the lower receiving groove 325, and three groups of positioning grooves 324 are spaced apart at the top of the guide groove 322. The metal core rod 31 includes an upper connecting shaft 312, a lower connecting shaft 313 is fixedly connected to the lower end of the upper connecting shaft 312, the outer wall of the lower connecting shaft 313 is slidably connected in the lower receiving groove 325, the upper end of the upper connecting shaft 312 extends through the upper receiving groove 321, and a locking assembly 314 is slidably connected to the inner wall of the lower connecting shaft 313. The locking assembly 314 is used to fix the metal core rod 31 and the insulating sleeve 32.

[0026] For details, please refer to Figure 4 An outer thread 311 is provided on the outer wall of the upper connecting shaft 312, and an inner thread 316 is provided on the inner wall of the lower connecting shaft 313. The inner thread 316 matches the outer thread 311. The two groups of metal core rods 31 are installed by threading the outer thread 311 with the adjacent group of inner threads 316. Three groups of sliding grooves 315 are provided on the outer wall of the lower connecting shaft 313. A locking assembly 314 is slidably connected inside the lower connecting shaft 313, and a portion of the locking assembly 314 passes through the sliding groove 315 and extends out of the lower connecting shaft 313.

[0027] For details, please refer to Figure 5 The locking assembly 314 includes a slide plate 3142. Three groups of mounting grooves 3143 are spaced apart on the upper edge of the slide plate 3142. A connecting rod 3146 is fixedly connected in the mounting groove 3143. The end of the connecting rod 3146 away from the slide plate 3142 passes through the slide groove 315 and is fixedly connected to the positioning block 3141. An elastic assembly 3144 is fixedly connected to the upper end surface of the slide plate 3142. The side of the elastic assembly 3144 away from the slide plate 3142 is fixedly connected to the top of the inner cavity of the lower connecting shaft 313. When the upper connecting shaft 312 of the adjacent group rotates along the internal thread 316 to the top of the lower connecting shaft 313, the slide plate 3142 is pushed by the upper connecting shaft 312 to compress the elastic assembly 3144 and move upward. The positioning block 3141 is driven to move upward along the guide groove 322 by the connecting rod 3146. When the positioning block 3141 moves into the positioning groove 324, the upper connecting shaft 312 is stopped from rotating. While the connection between the two adjacent groups of insulators 3 is completed, the insulating sleeve 32 is fixed to the outer wall of the metal core rod 31. When disassembling, the upper connecting shaft 312 is rotated in the opposite direction. The distance between the upper connecting shaft 312 and the top of the inner cavity of the lower connecting shaft 313 gradually increases. At the same time, the compressed elastic component 3144 pushes the slide plate 3142 to move downward, so that the positioning block 3141 is disengaged from the positioning groove 324. At this time, the insulating sleeve 32 and the metal core rod 31 are in a sliding state, and the insulating sleeve 32 can be disassembled.

[0028] It should be added that the top of the upper connecting shaft 312 is conical, and a positioning hole 3145 is opened at the upper end of the slide plate 3142, so that when the upper connecting shaft 312 is rotated and installed, the upper connecting shaft 312 extends into the positioning hole 3145 to avoid the slide plate 3142 from being offset when being pushed by the upper connecting shaft 312.

[0029] It should also be added that the positioning block 3141 is a metal ball wrapped with elastic material on the outside, which provides a certain supporting force while preventing sliding in the positioning groove 324.

[0030] It should be noted that the upper mounting seat 1 has an internally threaded sleeve at the lower end that matches the external thread 311, and the lower mounting seat 2 has an externally threaded column at the top that matches the internal thread 316. The upper mounting seat 1 and the lower mounting seat 2 are connected to the two ends of the insulator chain composed of several groups of insulators 3 through threaded matching.

[0031] Principle: Pass the upper connecting shaft 312 through the upper placement groove 321, sleeve the ceramic matrix 323 on the outer surface of the external thread 311 and the lower connecting shaft 313, screw the upper connecting shaft 312 into the internal threaded sleeve of the upper mounting seat 1, and fix the upper mounting seat 1 on the top. Take the second group of insulators 3, and extend the upper connecting shaft 312 into the inner cavity of the first group of lower connecting shafts 313. Through the external thread 311 on the outer wall of the second group of upper connecting shafts 312 and the internal thread 316 on the inner wall of the first group of lower connecting shafts 313, screw the second group of upper connecting shafts 312 into the first group. In the lower connecting shaft 313, the second group of upper connecting shafts 312 moves upward along the internal thread 316 of the inner wall of the first group of lower connecting shafts 313, and at the same time pushes the slide plate 3142 in the first group of lower connecting shafts 313 to compress the elastic component 3144 and move upward, and drives the positioning block 3141 to move along the guide groove 322 through the connecting rod 3146 until the positioning block 3141 moves into the positioning groove 324, and the positioning block 3141 cooperates with the positioning groove 324 to fix the first group of ceramic matrix 323 on the outer wall of the lower connecting shaft 313, and at the same time positions the first group of ceramic matrix 323. After the block 3141 is fixed, the height of the slide plate 3142 is limited. Since the elastic component 3144 is in a compressed state, the compressed elastic component 3144 pushes the slide plate 3142 to move downward, and the positioning hole 3145 cooperates with the top cone of the upper connecting shaft 312 to limit the upper connecting shaft 312 to prevent the upper connecting shaft 312 from rotating due to external force. According to the same operation, several groups of insulators 3 are connected. The insulator 3 at the bottom is matched with the threaded column at the top of the lower mounting seat 2 to complete the installation of the combined insulator. When unloading, the upper end of the metal core rod 31 of the group to be disassembled is removed by rotating the upper connecting shaft 312 in the opposite direction, and then the upper connecting shaft 312 threadedly connected to the bottom lower connecting shaft 313 of the group is rotated in the opposite direction. The compressed elastic component 3144 pushes the slide plate 3142 to move downward, thereby driving the positioning block 3141 to disengage from the positioning groove 324. While removing the lower end of the metal core rod 31 of the group, the fixation of the metal core rod 31 and the insulating sleeve 32 of the group is released, and the metal core rod 31 and the insulating sleeve 32 can be replaced according to needs.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An independently replaceable combined insulator, comprising a plurality of groups of insulators (3) connected end to end in a chain, characterized in that: The insulator (3) located at the top is fixedly connected to an upper mounting seat (1), and the insulator (3) located at the bottom is fixedly connected to a lower mounting seat (2). The insulator (3) comprises a metal core rod (31), an outer wall of the metal core rod (31) is fixedly connected to an insulating sleeve (32), the metal core rod (31) comprises an upper connecting shaft (312), a lower end of the upper connecting shaft (312) is fixedly connected to a lower connecting shaft (313), an inner cavity of the lower connecting shaft (313) is slidably connected to a locking assembly (314), and the upper connecting shaft (312) and the adjacent group of lower connecting shafts (313) are used to fixedly connect two adjacent groups of insulators (3).

2. The independently replaceable combined insulator according to claim 1, characterized in that: The insulating sleeve (32) comprises a ceramic matrix (323), an upper placement groove (321) is provided on the top of the ceramic matrix (323), a lower placement groove (325) is provided on the bottom of the ceramic matrix (323), the lower placement groove (325) is communicated with the upper placement groove (321), and the upper connecting shaft (312) and the lower connecting shaft (313) are slidably connected in the upper placement groove (321) and the lower placement groove (325), respectively.

3. The independently replaceable combined insulator according to claim 2, characterized in that: An outer wall of the upper connecting shaft (312) is provided with an external thread (311), and an inner wall of the lower connecting shaft (313) is provided with an internal thread (316), wherein the internal thread (316) is threadably matched with the external thread (311).

4. The independently replaceable combined insulator according to claim 3, characterized in that: Three groups of slide grooves (315) are spaced apart on the outer wall of the lower connecting shaft (313), and a portion of the locking assembly (314) passes through the slide grooves (315) and extends to the outside of the lower connecting shaft (313).

5. The independently replaceable combined insulator according to claim 4, characterized in that: The locking assembly (314) comprises a slide plate (3142), three groups of mounting grooves (3143) are spaced apart on the outer edge of the upper end of the slide plate (3142), a connecting rod (3146) is fixedly connected in the mounting groove (3143), a positioning block (3141) is fixedly connected to the side of the connecting rod (3146) facing away from the slide plate (3142), an elastic assembly (3144) is fixedly connected to the upper end surface of the slide plate (3142), and a side of the elastic assembly (3144) facing away from the slide plate (3142) is fixedly connected to the top of the inner cavity of the lower connecting shaft (313).

6. The independently replaceable combined insulator according to claim 5, characterized in that: A guide groove (322) is provided on the side wall of the lower placement groove (325), and three groups of positioning grooves (324) are provided at intervals on the top of the guide groove (322). The positioning grooves (324) are of the same shape and size as the positioning block (3141).

Images