Lightning arrester thermal shrinkable sleeve automatic feeding device

Abstract

The automatic feeding device is characterized in that a sleeve supply mechanism and a cutting mechanism are arranged on a rack, the cutting mechanism is located on an upper working table, and a main positioning mechanism is arranged on a lower working table; the main positioning mechanism comprises a resistor disc support and further comprises a servo shaft arranged on one side of the resistor disc support, the servo shaft is provided with a traction assembly in a lifting mode, the traction assembly is in linkage with the free end of the thermal shrinkage sleeve, and the traction assembly is provided with sleeving operation holes allowing the resistor discs stacked on the resistor disc support to penetrate through. The upper workbench is provided with a cutting hole penetrating in the vertical direction, the cutting hole is coaxially formed above the sleeving operation hole, and the cutting mechanism comprises an annular cutting tool bit arranged on the side portion of the lower portion of the cutting hole in an aligned mode and an annular cutting driving assembly capable of driving the annular cutting tool bit to cut off the thermal shrinkable sleeve in the circumferential direction. The automatic feeding device for the lightning arrester thermal shrinkage sleeve can effectively improve the thermal shrinkage processing precision and processing efficiency of a lightning arrester core body, and the product quality of the lightning arrester core body subjected to thermal shrinkage processing is correspondingly improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat shrinkage treatment of a lightning arrester core and its supporting equipment, and in particular to an automatic feeding device for a heat shrink sleeve of a lightning arrester. Background Art

[0002] The core of the arrester is mainly composed of metal oxide resistors. In order to ensure the stability of the assembly position of each resistor inside the core, an insulating heat shrink sleeve needs to be sheathed on the outside of the stacked cores to heat shrink and fix each resistor.

[0003] In the existing process, when installing the heat shrink sleeve on the surface of the heat shrink core, manual installation and manual cutting are mostly used. Although this completely manual operation method can meet the basic working condition processing requirements at this stage, in the specific implementation process, the operation accuracy and stability of manual operation are uncontrollable. When the staff manually implements the installation and assembly of the heat shrink sleeve on the resistor, it is easy to cause the position of the resistor to shift, thereby affecting the overall heat shrink quality of the arrester core; in addition, after the heat shrink sleeve and each resistor are assembled, the staff manually cuts the edge of the heat shrink sleeve. The manual cutting operation accuracy is poor, and the cutting efficiency is also relatively low, which not only affects the overall production efficiency of the arrester core, but also makes it difficult to ensure the quality of the product after cutting.

[0004] In view of this, how to optimize the heat shrink treatment method of the arrester core, improve its heat shrink treatment accuracy and processing efficiency, and accordingly improve the product quality of the arrester core after heat shrink treatment is an important technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic feeding device for heat shrink sleeves of lightning arresters, which can effectively improve the heat shrink processing accuracy and processing efficiency of the lightning arrester core, and accordingly improve the product quality of the lightning arrester core after heat shrink processing.

[0006] In order to solve the above technical problems, the present invention provides an automatic feeding device for heat shrink sleeves of lightning arresters, comprising a frame and an upper working table and a lower working table horizontally arranged on the frame, wherein the upper working table is located on one side of the lower working table in the horizontal direction, and the upper working table is higher than the lower working table;

[0007] The frame is also provided with a sleeve supply mechanism and a cutting mechanism arranged in sequence along the conveying direction of the heat shrink sleeve, the cutting mechanism is located on the upper working table, and the lower working table is provided with a main positioning mechanism;

[0008] The main positioning mechanism includes a resistor holder arranged below the cutting mechanism in the vertical direction, each resistor is stacked on the resistor holder, the main positioning mechanism also includes a servo shaft arranged on one side of the resistor holder, the servo shaft extends in the vertical direction, a traction assembly capable of being linked to the free end of the heat shrink sleeve is provided on the servo shaft so as to be reciprocatingly raised and lowered, and the traction assembly has a set operation hole for each resistor stacked on the resistor holder to pass through;

[0009] The upper working table has a cutting hole penetrating in the vertical direction, and the cutting hole is coaxially arranged above the set working hole. The cutting mechanism includes a circular cutting head arranged on the lower side of the cutting hole and a circular cutting drive assembly that can drive the circular cutting head to cut off the heat shrink sleeve along the circumferential direction.

[0010] Preferably, the traction assembly comprises a traction platform slidably arranged on the servo shaft, a traction arm is arranged on each side of the traction platform, and the traction platform is also provided with a clamping cylinder capable of driving the two traction arms to close or separate in the horizontal direction;

[0011] A traction frame is provided on the traction platform in linkage, and the traction frame is formed by two positioning frames that can be opened and matched in the horizontal direction and are aligned and buckled together. The positioning frames are linked and connected to the traction arms in a one-to-one correspondence, and a traction groove is provided in the middle of the outer wall of the free end of the positioning frame. After the two positioning frames are aligned and buckled together, the two traction grooves are aligned and spliced ​​to form the set working hole.

[0012] Preferably, a plurality of guide brackets are protruding from the inner wall of the traction groove, and the guide brackets include a supporting portion and a guide portion arranged in sequence from bottom to top, the guide portion protrudes from the top surface of the positioning frame, and the thickness and width of the guide portion decrease from bottom to top.

[0013] Preferably, a telescopic cylinder is also provided on the traction arm, and the free end of the telescopic cylinder can be telescopically moved back and forth parallel to the top surface of the positioning frame. The free end of the telescopic cylinder is linked to a jacket end head arranged in alignment with the guide bracket. The free end of the telescopic cylinder is extended to press the jacket end head against the outer wall of the guide bracket so as to clamp and fix the heat shrink sleeve between the jacket end head and the guide bracket.

[0014] Preferably, a jacket groove is recessed on the outer wall of the support portion for the jacket end to be aligned and embedded in the horizontal direction.

[0015] Preferably, the cutting mechanism comprises an annular tooling frame coaxially arranged below the cutting hole, a cutter head bracket is linked to the bottom of the annular tooling frame, a feed slide rail extending radially along the annular tooling frame is arranged on the cutter head bracket, and the circular cutting cutter head is slidably arranged on the feed slide rail;

[0016] The circular cutting drive assembly comprises a circumferential cutting drive mechanism capable of driving the circular tooling frame to rotate on a fixed axis and a feed drive mechanism capable of driving the circular cutting cutter head to slide back and forth along a feed slide rail.

[0017] Preferably, the outer wall of the annular tooling frame is provided with an annular tooth surface arranged along its circumference, and the circumferential cutting drive mechanism includes a cutting drive motor arranged on the upper working table and a circumferential driving gear set transmission-connected between the cutting drive motor and the annular tooth surface.

[0018] Preferably, the sleeve supply mechanism comprises a coiling rack on which the heat shrink sleeve is wound and can rotate on a fixed axis, and a feeding mechanism and a pre-positioning mechanism sequentially arranged downstream of the coiling rack along the conveying direction of the heat shrink sleeve;

[0019] The feeding mechanism includes a feeding rack fixed on the upper working table, an upper feeding roller and a lower feeding roller are rotatably provided on the feeding rack, a feeding driving motor which can drive the upper feeding roller and the lower feeding roller to rotate respectively on a fixed axis is provided on the side of the feeding rack, the axis of the upper feeding roller is parallel to the axis of the lower feeding roller, and the rotation directions of the upper feeding roller and the lower feeding roller are opposite, so as to drive the heat shrink sleeve to be transported from the coil rack to the pre-positioning mechanism, and the gap between the upper feeding roller and the lower feeding roller is matched to form a feeding gap for the heat shrink sleeve to pass through.

[0020] Preferably, the pre-positioning mechanism comprises a pre-positioning bracket vertically arranged on the upper working table, the pre-positioning bracket is located on one side above the cutting hole, a plurality of material guide rollers are protruding from the pre-positioning bracket, each of the material guide rollers is arranged in a group of two in a horizontal direction to form a pre-positioning roller group, two material guide rollers in any pre-positioning roller group are gap-matched in the horizontal direction to form a pre-positioning gap, and each of the pre-positioning gaps is sequentially aligned and arranged above the set working hole in the vertical direction;

[0021] The pre-positioning mechanism further includes a positioning guide column arranged in the vertical direction and sequentially passing through each of the pre-positioning gaps, the positioning guide column is located above the resistor support, and the positioning guide column is coaxially arranged with each stacked resistor located on the resistor support;

[0022] The pre-positioning mechanism also includes a pre-positioning motor capable of driving each of the guide rollers to rotate on a fixed axis. The rotation directions of the two guide rollers in any pre-positioning roller group are opposite, so that the heat shrink sleeve is sleeved onto the positioning guide column from top to bottom and passes through each of the pre-positioning gaps in sequence.

[0023] Preferably, a horizontally arranged workstation turntable is provided on the lower workbench, the main positioning mechanism is linkedly arranged on the workstation turntable, and the lower workbench is also provided with a workstation switching drive mechanism capable of driving the workstation turntable to rotate on a fixed axis.

[0024] Compared with the above-mentioned background technology, the automatic feeding device for heat shrink sleeves of lightning arresters provided by the present invention, during its operation and use, the resistors that need to be heat shrunk for assembly are stacked on the resistor bracket. When the heat shrink sleeve installation operation is carried out, the heat shrink sleeve to be used is transported to the cutting hole by the sleeve supply mechanism, and passes through the cutting hole to the traction component below, and the free end of the heat shrink sleeve is linked to the traction component. Thereafter, as the traction component moves from top to bottom along the servo axis, the free end of the heat shrink sleeve can be driven to move synchronously from top to bottom, so that as the stacked resistors on the resistor bracket pass through the installation operation hole from bottom to top, the heat shrink sleeve can be installed from top to bottom onto the outer periphery of the resistors in the stacked state, thereby realizing the heat shrink sleeve installation operation. After the heat shrink sleeve is completely fitted to the outer periphery of all the stacked resistors that need to be processed under the current working conditions, the heat shrink sleeve can be cut off along the circumferential direction using the circular cutting head. Since the cutting hole is located above the fitting operation hole, the incision obtained after the cutting is the upper end of the heat shrink sleeve fitted on the stacked resistors. In this way, it can be ensured that the size of the heat shrink sleeve fitted on the stacked resistors meets the size requirements of the arrester cell that needs to be heat-shrunk under the current working conditions, and the complete heat shrinkage treatment of each resistor stacked on the resistor bracket is ensured. The entire operation and use process of the automatic feeding device for the heat shrink sleeve of the lightning arrester completely relies on the action of the mechanical structure to realize the feeding, installation and cutting of the heat shrink sleeve, and no manual operation is required by the staff, which greatly improves the processing efficiency of the entire heat shrink sleeve feeding and installation operation and reduces the labor intensity of the staff. In addition, the resistors are stacked on the resistor bracket before assembly, which effectively avoids the displacement or loosening of the resistors during the heat shrink treatment, thereby effectively improving the positioning accuracy of the heat shrink sleeve on the stacked resistors, reducing the difficulty of assembly, and correspondingly improving the molding quality of the lightning arrester core product after the heat shrink treatment.

[0025] In another preferred embodiment of the present invention, the traction assembly includes a traction platform slidably arranged on the servo shaft, a traction arm is arranged on each side of the traction platform, and a clamping cylinder capable of driving the two traction arms to close or separate in a horizontal direction is also provided on the traction platform; a traction frame is linked to the traction platform, and the traction frame is formed by two positioning frames that can be opened and matched in a horizontal direction and are aligned and buckled together, the positioning frames are linked and connected to the traction arms in a one-to-one manner, and a traction groove is provided in the middle part of the outer wall of the free end of the positioning frame, and after the two positioning frames are aligned and buckled together, the two traction grooves are aligned and spliced ​​to form the set working hole. When the heat shrink sleeve is assembled, the two positioning frames are aligned and buckled under the action of the clamping cylinder to align and splice the two traction grooves to form a set operation hole. The free end of the heat shrink sleeve is linked to the traction frame, and the free end of the heat shrink sleeve is opened and arranged around the outer peripheral side of the set operation hole, so that when the traction platform slides from top to bottom, the resistors stacked on the resistor bracket can pass through the set operation hole from bottom to top, so that the free end of the heat shrink sleeve is mounted on the stacked resistors from top to bottom, thereby completing the heat shrink sleeve installation operation. After a single heat shrink treatment is completed, the clamping cylinder drives the two traction arms to move in opposite directions, so as to drive the two positioning frames to move synchronously and separate, and then the traction platform can be moved up and reset along the servo axis. Since the two positioning frames have been separated before resetting, the main structure of the arrester core product that has been heat shrunk and located between the two positioning frames will not interfere with or collide during the upward movement, thereby further improving the movement accuracy of the automatic feeding device of the arrester heat shrink sleeve and ensuring the quality of the arrester core product after the heat shrink sleeve is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is an axonometric diagram of the general assembly of an automatic feeding device for heat shrink sleeves of lightning arresters provided in a specific embodiment of the present invention;

[0028] Figure 2 for Figure 1 Axonometric drawing of the coordination structure between the center supply sleeve mechanism and the cutting mechanism;

[0029] Figure 3 for Figure 2 Axonometric drawing of the cutting mechanism and related matching parts from an upward angle;

[0030] Figure 4 for Figure 2 Axonometric view from the rear;

[0031] Figure 5 for Figure 1 Axonometric drawing of the assembly structure of the central main positioning mechanism and related matching parts;

[0032] Figure 6 for Figure 5 Axonometric view of the traction assembly.

[0033] in:

[0034] 10-frame; 101-upper workbench; 102-lower workbench; 103-cutting hole; 104-station turntable;

[0035] 11-sleeve supply mechanism; 111-rolling rack; 112-feeding rack; 113-upper feeding roller; 114-lower feeding roller; 115-feeding drive motor; 116-feeding gap;

[0036] 12-cutting mechanism; 121-circular cutting head; 122-circular tooling frame; 123-cutting head bracket; 124-circular tooth surface; 125-cutting drive motor; 126-circumferential drive gear set;

[0037] 13-main positioning mechanism; 131-resistance sheet bracket; 132-servo axis; 133-traction assembly;

[0038] 14-traction platform; 141-traction arm; 142-clamping cylinder; 143-positioning frame; 144-traction groove; 145-guide bracket; 1451-support part; 1452-guide part; 146-telescopic cylinder; 147-jacket end; 148-jacket slot;

[0039] 15-pre-positioning bracket; 151-material guide roller; 152-pre-positioning gap; 153-positioning guide column; 154-pre-positioning sub-frame. DETAILED DESCRIPTION

[0040] The core of the present invention is to provide an automatic feeding device for heat shrink sleeves of lightning arresters, which can effectively improve the heat shrink processing accuracy and processing efficiency of the lightning arrester core, and accordingly improve the product quality of the lightning arrester core after heat shrink processing.

[0041] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Furthermore, in the present invention, unless explicitly specified and limited otherwise, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other through another feature therebetween.

[0044] In addition, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. The terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] Please refer to Figures 1 to 6 .

[0046] In a specific embodiment, the automatic feeding device for the heat shrink sleeve of the lightning arrester provided by the present invention includes a frame 10 and an upper working table 101 and a lower working table 102 horizontally arranged on the frame 10, wherein the upper working table 101 is located on one side of the lower working table 102 in the horizontal direction, and the upper working table 101 is higher than the lower working table 102;

[0047] The frame 10 is also provided with a sleeve supply mechanism 11 and a cutting mechanism 12 arranged in sequence along the conveying direction of the heat shrink sleeve. The cutting mechanism 12 is located on the upper working table 101, and a main positioning mechanism 13 is provided on the lower working table 102.

[0048] The main positioning mechanism 13 includes a resistor bracket 131 arranged below the cutting mechanism 12 in the vertical direction, and the assembled resistors are stacked on the resistor bracket 131. The main positioning mechanism 13 also includes a servo shaft 132 arranged on one side of the resistor bracket 131. The servo shaft 132 extends in the vertical direction. The servo shaft 132 is provided with a traction component 133 that can be linked to the free end of the heat shrink sleeve and can be reciprocated and lifted. The traction component 133 has a set operation hole for each resistor stacked on the resistor bracket 131 to pass through;

[0049] The upper working table 101 has a cutting hole 103 that penetrates in the vertical direction. The cutting hole 103 is coaxially arranged above the set working hole. The cutting mechanism 12 includes a circular cutting head 121 arranged on the lower side of the cutting hole 103 and a circular cutting drive assembly that can drive the circular cutting head 121 to cut off the heat shrink sleeve along the circumferential direction.

[0050] During the specific operation and use of the equipment, the resistors that need to be heat-shrunk for assembly are stacked on the resistor bracket 131. When the heat shrink sleeve installation operation is performed, the heat shrink sleeve to be used is transported to the cutting hole 103 by the sleeve supply mechanism 11, and passes through the cutting hole 103 to the traction component 133 below, and the free end of the heat shrink sleeve is linked to the traction component 133. After that, the free end of the heat shrink sleeve can be driven to move synchronously from top to bottom during the process of the traction component 133 moving from top to bottom along the servo shaft 132, so that the heat shrink sleeve can be mounted from top to bottom on the outer periphery of the resistors in the stacked state during the process of the stacking operation holes of the stacking resistors on the resistor bracket 131 from bottom to top, thereby realizing the heat shrink sleeve installation operation.

[0051] After the heat shrink sleeve is completely fitted to the outer periphery of all the stacked resistors that need to be processed in the current working condition, the heat shrink sleeve can be cut off along the circumferential direction using the circular cutting blade 121. Since the cutting hole 103 is located above the fitting operation hole, the incision obtained after the cutting is completed is the upper end of the heat shrink sleeve fitted on the stacked resistors. In this way, it can be ensured that the size of the heat shrink sleeve fitted on the stacked resistors meets the size requirements of the arrester cell that needs to be heat-shrunk in the current working condition, and the complete heat shrinkage treatment of each resistor stacked on the resistor bracket 131 is ensured.

[0052] The entire operation and use process of the automatic feeding device for the heat shrink sleeve of the lightning arrester completely relies on the mechanical structure action to realize the feeding, assembly and cutting of the heat shrink sleeve, and no manual operation is required by the staff, which greatly improves the processing efficiency of the entire heat shrink sleeve installation operation and reduces the labor intensity of the staff. The resistors before assembly are stacked on the resistor bracket 131, which effectively avoids the displacement or loosening of the resistors during the heat shrinking process, thereby effectively improving the positioning accuracy of the heat shrink sleeve on the stacked resistors, reducing the difficulty of assembly, and correspondingly improving the molding quality of the lightning arrester core product after the heat shrinking process.

[0053] Normally, the movement of the traction component 133 along the servo shaft 132 can be driven by an electric push rod, an electric lead screw mechanism, or a hydraulic cylinder or a pneumatic cylinder. Accordingly, the movement rate of the traction component 133 during the lifting or lowering process along the servo shaft 132 is set in the range of 4 mm / s to 10 mm / s, that is, the minimum movement rate of the traction component 133 along the servo shaft 132 is 4 mm / s, and the maximum movement rate is 10 mm / s, which can match the equipment operation requirements under most conventional working conditions.

[0054] Generally, a single-chip microcomputer or PLC (programmable logic controller) is also arranged in the automatic feeding device of the heat shrink sleeve of the lightning arrester as a controller to monitor and adjust the start and stop and action status of each action component and driving mechanism, so as to ensure that the automatic feeding device of the heat shrink sleeve of the lightning arrester can meet the heat shrink sleeve installation operation requirements under different working conditions.

[0055] Specifically, the traction assembly 133 includes a traction platform 14 slidably arranged on the servo shaft 132, and a traction arm 141 is arranged on each side of the traction platform 14. The traction platform 14 is also provided with a clamping cylinder 142 that can drive the two traction arms 141 to close or separate in the horizontal direction; a traction frame is linked to the traction platform 14, and the traction frame is composed of two positioning frames 143 that can be opened and matched in the horizontal direction and are aligned and buckled together. The positioning frames 143 are linked and connected to the traction arms 141 in a one-to-one manner, and a traction groove 144 is provided in the middle of the outer wall of the free end of the positioning frame 143. After the two positioning frames 143 are aligned and buckled together, the two traction grooves 144 are aligned and spliced ​​to form a set working hole.

[0056] When the heat shrink sleeve is installed, the two positioning frames 143 are aligned and buckled under the action of the clamping cylinder 142 so that the two traction grooves 144 are aligned and spliced ​​to form a set operation hole. The free end of the heat shrink sleeve is linked to the traction frame, and the free end of the heat shrink sleeve is opened and arranged around the outer peripheral side of the set operation hole, so that when the traction platform 14 slides from top to bottom, the resistors stacked on the resistor bracket 131 can pass through the set operation hole from bottom to top, so that the free end of the heat shrink sleeve is mounted on the stacked resistors from top to bottom, thereby completing the heat shrink sleeve installation operation.

[0057] After a single heat shrink treatment is completed, the clamping cylinder 142 drives the two traction arms 141 to move in opposite directions, so as to drive the two positioning frames 143 to move synchronously and separate, and then the traction platform 14 can be moved up and reset along the servo axis 132. Since the two positioning frames 143 have been separated before resetting, the main structure of the arrester core product that has been heat shrunk and is located between the two positioning frames 143 will not interfere with or collide during the upward movement, thereby further improving the movement accuracy of the automatic feeding device of the arrester heat shrink sleeve and ensuring the quality of the arrester core product after the heat shrink sleeve is installed.

[0058] Accordingly, bolt connections or pin-insertion locking components can be used to realize the alignment and flexible disassembly between the traction frame of the traction assembly 133 and the main components such as the traction platform 14, so that when necessary, the traction frame and other components can be replaced with the size specifications that match the current working conditions, thereby further improving the working condition adaptability of the traction assembly 133.

[0059] On this basis, a plurality of guide brackets 145 are protrudingly provided on the inner wall of the traction groove 144. The guide bracket 145 includes a support portion 1451 and a guide portion 1452 arranged sequentially from bottom to top. The guide portion 1452 protrudes from the top surface of the positioning frame 143, and the thickness and width of the guide portion 1452 decrease from bottom to top. When the free end of the heat shrink sleeve is linked to the traction frame, the guide portion 1452 can be used to properly penetrate into the heat shrink sleeve and properly expand the heat shrink sleeve, so that the subsequent heat shrink sleeve can be more smoothly sleeved on the outer periphery of the stacked resistor sheets.

[0060] Generally, the guide portion 1452 is a conical structure that is pointed at the top and wide at the bottom, thin at the top and thick at the bottom, so that the heat shrink sleeve can be accurately expanded without damaging the main structure of the heat shrink sleeve, so that the heat shrink sleeve can be more smoothly put on the outer periphery of the stacked resistor sheets, and the heat shrink sleeve can fully wrap the outer surface of the resistor sheet.

[0061] Of course, the side shape of the guide portion 1452 can be a triangle as shown in the figure, or a trapezoid or other shapes, and according to the specific working conditions, the guide portion 1452 can have an arc structure with the top moderately bent toward the axis, so as to better adapt to the heat shrink sleeve and make the movement of the guide bracket 145 when inserting the heat shrink sleeve smoother and more efficient.

[0062] Furthermore, a telescopic cylinder 146 is also provided on the traction arm 141, and the free end of the telescopic cylinder 146 can be telescopically moved back and forth parallel to the top surface of the positioning frame 143. The free end of the telescopic cylinder 146 is linked with a jacket end 147 arranged in alignment with the guide bracket 145. The free end of the telescopic cylinder 146 is extended to press the jacket end 147 against the outer wall of the guide bracket 145, so as to clamp and fix the heat shrink sleeve between the jacket end 147 and the guide bracket 145. After the free end of the telescopic cylinder 146 is extended, the free end of the heat shrink sleeve can be clamped and fixed between the jacket end 147 and the outer wall of the guide bracket 145, thereby forming a linkage connection between the free end of the heat shrink sleeve and the traction frame, so as to meet the subsequent operation requirements such as moving the heat shrink sleeve downward and setting it. After a single heat shrink sleeve installation operation is completed, the free end of the telescopic cylinder 146 is retracted and reset to release the clamping of the free end of the heat shrink sleeve, so as to facilitate the re-clamping of the free end of the heat shrink sleeve when the heat shrink sleeve is moved down for installation.

[0063] Furthermore, a jacket groove 148 is recessed on the outer wall of the support portion 1451 for the jacket end 147 to be aligned and embedded in the horizontal direction. The jacket groove 148 can further optimize the alignment, pressing and fitting effect between the guide bracket 145 and the jacket end 147, so that the free end of the heat shrink sleeve can be clamped and fixed between the jacket end 147 and the guide bracket 145 more firmly and reliably.

[0064] Correspondingly, the outer surface of the jacket end 147 has a rubber anti-slip layer to further improve the adaptability strength after the jacket end 147 and the jacket slot 148 are aligned, embedded and snap-fitted, so that the free end of the heat shrink sleeve can be more firmly and reliably linked to the traction frame.

[0065] On the other hand, the cutting mechanism 12 includes an annular tooling frame 122 coaxially arranged below the cutting hole 103, and a tool head bracket 123 is linked to the bottom of the annular tooling frame 122. The tool head bracket 123 is provided with a feed slide rail extending radially along the annular tooling frame 122, and the circular cutting tool head 121 is slidably set on the feed slide rail.

[0066] The circular cutting drive assembly includes a circumferential cutting drive mechanism capable of driving the circular tooling frame 122 to rotate along a fixed axis and a feed drive mechanism capable of driving the circular cutting cutter head 121 to slide back and forth along the feed slide rail.

[0067] During the conveying process of the heat shrink sleeve, the circular cutting head 121 is at the outermost workstation. When the heat shrink sleeve needs to be cut, the feed drive mechanism drives the cutter head bracket 123 to move along the feed slide rail to the end close to the axis of the annular tooling frame 122. At this time, the circular cutting head 121 moves synchronously with the cutter head bracket 123 until the blade of the circular cutting head 121 contacts the heat shrink sleeve passing through the middle of the annular tooling frame 122. Then, the circular cutting head 121 continues to move moderately so that its blade penetrates and cuts into the heat shrink sleeve. Then, the circumferential cutting drive mechanism drives the annular tooling frame 122 to rotate one circle on the fixed axis, so as to drive the circular cutting head 121 to move synchronously for one circle, thereby utilizing the blade of the circular cutting head 121 to complete the circular cutting process of the heat shrink sleeve. After a single circular cutting process is completed, the feed drive mechanism moves in the opposite direction to drive the cutter head bracket 123 and the circular cutting cutter head 121 to move outward and reset synchronously to avoid interfering with the heat shrink sleeve conveying path during the next heat shrink sleeve feeding and installation process.

[0068] Specifically, the outer wall of the annular fixture 122 is provided with an annular tooth surface 124 arranged along the circumference thereof, and the circumferential cutting drive mechanism includes a cutting drive motor 125 provided on the upper workbench 101 and a circumferential driving gear set 126 which is transmission-connected between the cutting drive motor 125 and the annular tooth surface 124. The cutting drive motor 125 drives the circumferential driving gear set 126 to rotate in sequence, so that the annular fixture 122 is driven to rotate synchronously with a fixed axis through the meshing transmission between the circumferential driving gear set 126 and the annular tooth surface 124, so as to realize the synchronous circumferential displacement of the annular cutting cutter head 121, thereby realizing the corresponding heat shrink sleeve annular cutting process.

[0069] It is not difficult to understand that the circumferential drive gear set 126 is not limited to the two-stage gear transmission mechanism composed of two gears as shown in the figure, and other numbers or arrangements of gear components can also be used to achieve the corresponding transmission deceleration effect or meet the corresponding component assembly space requirements.

[0070] More specifically, the sleeve supply mechanism 11 comprises a coil rack 111 on which the heat shrink sleeve is wound and can rotate around a fixed axis, and a feeding mechanism and a pre-positioning mechanism sequentially arranged downstream of the coil rack 111 along the conveying direction of the heat shrink sleeve.

[0071] The feeding mechanism includes a feeding rack 112 fixed on the upper working table 101, and an upper feeding roller 113 and a lower feeding roller 114 are rotatably arranged on the feeding rack 112. A feeding driving motor 115 is arranged on the side of the feeding rack 112, which can drive the upper feeding roller 113 and the lower feeding roller 114 to rotate respectively on a fixed axis. The axis of the upper feeding roller 113 is parallel to the axis of the lower feeding roller 114, and the rotation directions of the upper feeding roller 113 and the lower feeding roller 114 are opposite, so as to drive the heat shrink sleeve to be transported from the coil rack 111 to the pre-positioning mechanism, and the gap between the upper feeding roller 113 and the lower feeding roller 114 is matched to form a feeding gap 116 for the heat shrink sleeve to pass through.

[0072] It is not difficult to understand that the double-roller clamping feeding mechanism used by the feeding mechanism belongs to a relatively conventional component arrangement in the field of belt material conveying. Those skilled in the art can refer to the corresponding arrangement and understanding of conventional technology, and no further details will be given.

[0073] Accordingly, the spacing between the upper feed roller 113 and the lower feed roller 114 can be adjusted by adjusting the screw and other action mechanisms to adjust the width of the feed gap 116, so as to adapt to the conveying requirements of heat shrink sleeves of different thicknesses and sizes, and avoid the heat shrink sleeves being squeezed and deformed due to the feed gap 116 being too small. Of course, no matter how the adjustment is made, it should be ensured that the outer wall of the heat shrink sleeve can reliably contact the outer peripheral wall of the upper feed roller 113 and the lower feed roller 114, so as to ensure the corresponding structural friction and conveying efficiency.

[0074] In addition, the pre-positioning mechanism includes a pre-positioning bracket 15 vertically arranged on the upper working table 101, the pre-positioning bracket 15 is located on one side above the cutting hole 103, and a plurality of guide rollers 151 are protruding from the pre-positioning bracket 15. Each guide roller 151 is arranged in a group of two in the horizontal direction to form a pre-positioning roller group. The two guide rollers 151 in any pre-positioning roller group are matched with each other in the horizontal direction to form a pre-positioning gap 152, and each pre-positioning gap 152 is arranged in sequence in the vertical direction above the set working hole.

[0075] The pre-positioning mechanism also includes a positioning guide column 153 arranged in the vertical direction and passing through each pre-positioning gap 152 in sequence. The positioning guide column 153 is located above the resistor bracket 131, and the positioning guide column 153 is coaxially arranged with each stacked resistor located on the resistor bracket 131.

[0076] The pre-positioning mechanism also includes a pre-positioning motor capable of driving each guide roller 151 to rotate on a fixed axis. The rotation directions of the two guide rollers 151 in any pre-positioning roller group are opposite, so that the heat shrink sleeve is sleeved from top to bottom onto the positioning guide column 153 and passes through each pre-positioning gap 152 in sequence.

[0077] When the equipment is in operation, the free end of the heat shrink sleeve is inserted from top to bottom by the top of the positioning guide column 153, so that the heat shrink sleeve can be fully expanded by the top structure of the positioning guide column 153, so that the heat shrink sleeve can be more smoothly installed on the downstream stacked resistor sheet. After being expanded by the positioning guide column 153, the heat shrink sleeve gradually moves down along the outer periphery of the positioning guide column 153 under the coordinated action of each pre-positioning roller group until the heat shrink sleeve is accurately installed on the outer periphery of the stacked resistor sheet below the positioning guide column 153, thereby completing the corresponding heat shrink processing operation.

[0078] It should be particularly noted that the top of the positioning guide column 153 is preferably a cone with a sharp top and a thick bottom, so that the heat shrink sleeve can be inserted more smoothly.

[0079] On this basis, the pre-positioning bracket 15 can be composed of two pre-positioning sub-frames 154 that are aligned and adapted to the left and right, and the two guide rollers 151 in any group of pre-positioning roller groups are arranged one by one on the two pre-positioning sub-frames 154. Accordingly, the spacing between the two pre-positioning sub-frames 154 can be adjusted by a rocker mechanism in conjunction with a rocker drive motor, thereby adjusting the gap between the two guide rollers 151 in the pre-positioning roller group, thereby adjusting the width of the pre-positioning gap 152, so as to meet the alignment and guiding operation requirements of positioning guide columns 153 and heat shrink sleeves of different sizes.

[0080] Accordingly, the pre-positioning bracket 15 and its related matching parts can be assembled on a support plate that can be moved horizontally, so as to flexibly adjust the adaptation gap and relative position of the pre-positioning mechanism and the related matching devices according to actual working conditions, thereby optimizing the working condition adaptability of the automatic feeding device for the heat shrink sleeve of the lightning arrester.

[0081] In addition, a horizontally arranged workstation turntable 104 is provided on the lower workbench 102, and the main positioning mechanism 13 is linked to the workstation turntable 104, and a workstation switching driving mechanism capable of driving the workstation turntable 104 to rotate on a fixed axis is also provided on the lower workbench 102. The workstation switching driving mechanism can be a stepping motor, or a gear rack mechanism or other driving mechanism capable of realizing step-by-step motion, so that during the processing of the entire arrester core body, the workstation turntable 104 can be driven to rotate on a fixed axis to realize the circumferential displacement of the main positioning mechanism 13, so as to quickly switch and transfer between multiple different workstations such as the resistor stacking workstation, the casing workstation, and the heat shrinking workstation, so as to realize efficient rotation operation, thereby further improving the working condition adaptability and work efficiency of the automatic feeding device for the heat shrink sleeve of the arrester.

[0082] In summary, the automatic feeding device for heat shrink sleeves of lightning arresters provided in the present invention, during its operation and use, the resistors that need to be heat shrunk for assembly are stacked on the resistor bracket. When the heat shrink sleeve installation operation is performed, the heat shrink sleeve to be used is transported to the cutting hole by the sleeve supply mechanism, and passes through the cutting hole to the traction component below, and the free end of the heat shrink sleeve is linked to the traction component. Thereafter, during the process of the traction component moving from top to bottom along the servo axis, the free end of the heat shrink sleeve can be driven to move synchronously from top to bottom, so that during the process of the stacked resistors on the resistor bracket passing through the installation operation hole from bottom to top, the heat shrink sleeve can be installed from top to bottom onto the outer periphery of the resistors in the stacked state, thereby realizing the heat shrink sleeve installation operation. After the heat shrink sleeve is completely fitted to the outer periphery of all the stacked resistors that need to be processed under the current working conditions, the heat shrink sleeve can be cut off along the circumferential direction using the circular cutting head. Since the cutting hole is located above the fitting operation hole, the incision obtained after the cutting is the upper end of the heat shrink sleeve fitted on the stacked resistors. In this way, it can be ensured that the size of the heat shrink sleeve fitted on the stacked resistors meets the size requirements of the arrester cell that needs to be heat-shrunk under the current working conditions, and the complete heat shrinkage treatment of each resistor stacked on the resistor bracket is ensured. The entire operation and use process of the automatic feeding device for the heat shrink sleeve of the lightning arrester completely relies on the action of the mechanical structure to realize the feeding, assembly and cutting of the heat shrink sleeve, and no manual operation is required by the staff, which greatly improves the processing efficiency of the entire heat shrink sleeve installation operation and reduces the labor intensity of the staff. In addition, the resistors before assembly are stacked on the resistor bracket, which effectively avoids the displacement or loosening of the resistors during the heat shrink treatment, thereby effectively improving the positioning accuracy of the heat shrink sleeve on the stacked resistors, reducing the difficulty of assembly, and correspondingly improving the molding quality of the lightning arrester core product after the heat shrink treatment.

[0083] The above is a detailed introduction to the automatic feeding device for the heat shrink sleeve of the lightning arrester provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An automatic feeding device for heat shrink sleeves of lightning arresters, characterized in that: The machine comprises a frame, and an upper workbench and a lower workbench horizontally arranged on the frame, wherein the upper workbench is located on one side of the lower workbench in the horizontal direction, and the upper workbench is higher than the lower workbench; The frame is also provided with a sleeve supply mechanism and a cutting mechanism arranged in sequence along the conveying direction of the heat shrink sleeve, the cutting mechanism is located on the upper working table, and the lower working table is provided with a main positioning mechanism; The main positioning mechanism includes a resistor holder arranged below the cutting mechanism in the vertical direction, each resistor is stacked on the resistor holder, the main positioning mechanism also includes a servo shaft arranged on one side of the resistor holder, the servo shaft extends in the vertical direction, a traction assembly capable of being linked to the free end of the heat shrink sleeve is provided on the servo shaft so as to be reciprocatingly raised and lowered, and the traction assembly has a set operation hole for each resistor stacked on the resistor holder to pass through; The upper working table has a cutting hole penetrating in the vertical direction, and the cutting hole is coaxially arranged above the set working hole. The cutting mechanism includes a circular cutting head arranged on the lower side of the cutting hole and a circular cutting drive assembly that can drive the circular cutting head to cut off the heat shrink sleeve along the circumferential direction.

2. The automatic feeding device for heat shrink sleeve of lightning arrester according to claim 1, characterized in that: The traction assembly comprises a traction platform slidably arranged on the servo shaft, a traction arm is arranged on each side of the traction platform, and a clamping cylinder capable of driving the two traction arms to close or separate in the horizontal direction is also arranged on the traction platform; A traction frame is provided on the traction platform in linkage, and the traction frame is formed by two positioning frames that can be opened and matched in the horizontal direction and are aligned and buckled together. The positioning frames are linked and connected to the traction arms in a one-to-one correspondence, and a traction groove is provided in the middle of the outer wall of the free end of the positioning frame. After the two positioning frames are aligned and buckled together, the two traction grooves are aligned and spliced ​​to form the set working hole.

3. The automatic feeding device for heat shrink sleeve of lightning arrester according to claim 2, characterized in that: A plurality of guide brackets are protruding from the inner wall of the traction groove, and the guide brackets include a supporting portion and a guide portion arranged in sequence from bottom to top. The guide portion protrudes from the top surface of the positioning frame, and the thickness and width of the guide portion decrease from bottom to top.

4. The automatic feeding device for heat shrink sleeve of lightning arrester according to claim 3, characterized in that: The traction arm is also provided with a telescopic cylinder, the free end of which can reciprocate and telescopically move parallel to the top surface of the positioning frame, and the free end of the telescopic cylinder is linked to a jacket end head arranged in alignment with the guide bracket. The free end of the telescopic cylinder is extended to press the jacket end head against the outer wall of the guide bracket so as to clamp and fix the heat shrink sleeve between the jacket end head and the guide bracket.

5. The automatic feeding device for heat shrink sleeve of lightning arrester according to claim 4, characterized in that: The outer wall of the support portion is recessed with a jacket clamping groove for the jacket end to be aligned and embedded in the horizontal direction.

6. The automatic feeding device for heat shrink sleeve of lightning arrester according to claim 1, characterized in that: The cutting mechanism comprises an annular tooling frame coaxially arranged below the cutting hole, a cutter head bracket is linked to the bottom of the annular tooling frame, a feed slide rail extending radially along the annular tooling frame is arranged on the cutter head bracket, and the circular cutting cutter head is slidably arranged on the feed slide rail; The circular cutting drive assembly comprises a circumferential cutting drive mechanism capable of driving the circular tooling frame to rotate on a fixed axis and a feed drive mechanism capable of driving the circular cutting cutter head to slide back and forth along a feed slide rail.

7. The automatic feeding device for heat shrink sleeve of lightning arrester according to claim 6, characterized in that: The outer wall of the annular tooling frame is provided with an annular tooth surface arranged along its circumference, and the circumferential cutting drive mechanism includes a cutting drive motor arranged on the upper working table and a circumferential driving gear set transmission-connected between the cutting drive motor and the annular tooth surface.

8. The automatic feeding device for heat shrink sleeve of lightning arrester according to claim 1, characterized in that: The sleeve supply mechanism comprises a coiling rack on which the heat shrink sleeve is wound and can rotate on a fixed axis, and a feeding mechanism and a pre-positioning mechanism sequentially arranged downstream of the coiling rack along the conveying direction of the heat shrink sleeve; The feeding mechanism includes a feeding rack fixed on the upper working table, an upper feeding roller and a lower feeding roller are rotatably provided on the feeding rack, a feeding driving motor which can drive the upper feeding roller and the lower feeding roller to rotate respectively on a fixed axis is provided on the side of the feeding rack, the axis of the upper feeding roller is parallel to the axis of the lower feeding roller, and the rotation directions of the upper feeding roller and the lower feeding roller are opposite, so as to drive the heat shrink sleeve to be transported from the coil rack to the pre-positioning mechanism, and the gap between the upper feeding roller and the lower feeding roller is matched to form a feeding gap for the heat shrink sleeve to pass through.

9. The automatic feeding device for heat shrink sleeve of lightning arrester according to claim 8, characterized in that: The pre-positioning mechanism comprises a pre-positioning bracket vertically arranged on the upper working table, the pre-positioning bracket is located on one side above the cutting hole, a plurality of material guide rollers are protruding from the pre-positioning bracket, each of the material guide rollers is arranged in a group of two in a horizontal direction to form a pre-positioning roller group, two material guide rollers in any pre-positioning roller group are matched with each other in a horizontal direction to form a pre-positioning gap, and each of the pre-positioning gaps is sequentially arranged in a vertical direction above the set working hole; The pre-positioning mechanism further includes a positioning guide column arranged in the vertical direction and sequentially passing through each of the pre-positioning gaps, the positioning guide column is located above the resistor support, and the positioning guide column is coaxially arranged with each stacked resistor located on the resistor support; The pre-positioning mechanism also includes a pre-positioning motor capable of driving each of the guide rollers to rotate on a fixed axis. The rotation directions of the two guide rollers in any pre-positioning roller group are opposite, so that the heat shrink sleeve is sleeved onto the positioning guide column from top to bottom and passes through each of the pre-positioning gaps in sequence.

10. The automatic feeding device for heat shrink sleeve of lightning arrester according to claim 1, characterized in that: The lower workbench is provided with a horizontally arranged workstation turntable, the main positioning mechanism is linkedly arranged on the workstation turntable, and the lower workbench is also provided with a workstation switching driving mechanism capable of driving the workstation turntable to rotate on a fixed axis.

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