A pot-type insulator demolding device

Abstract

This utility model relates to the field of molded product removal technology, specifically to a demolding device for a basin-type insulator. The basin-type insulator demolding device includes a template and tension screws for screwing onto the template on the side facing away from the mold cavity to fix the center conductor of the basin-type insulator to the template. It also includes an ejector component passing through the template and a pushing mechanism for pushing the ejector component. The ejector component has an inner end for extending into the mold cavity and an outer end facing away from the mold cavity. The template is provided with a guide structure for guiding the ejector component and a limiting structure for limiting the movement stroke of the ejector component. The template has a detachable assembly / disassembly structure on the side facing away from the mold cavity for detachable connection to the pushing mechanism. When in use, the pushing mechanism pushes the outer end of the ejector component and guides its movement, thus pushing the center conductor out of the template through its inner end. A certain deviation between the installation position and the pushing position of the pushing mechanism will not affect the pressing position of the ejector component on the center conductor, ensuring smooth demolding.

Description

Technical Field

[0001] This utility model relates to the field of molded product removal technology, specifically to a pot-type insulator demolding device. Background Technology

[0002] Epoxy resin pot insulators are among the most important insulating components in GIS equipment. They not only serve as a medium for connecting busbars but also function as isolation chambers, conductor supports, and arc-extinguishing insulation. The insulation performance of pot insulators directly affects the reliability of GIS equipment operation. If defects such as scratches and cracks occur during the manufacturing process of pot insulators, discharge breakdown will inevitably occur, affecting the insulation performance of the pot insulators. Therefore, it is essential to avoid damaging the finished product during demolding after casting.

[0003] Currently, the conventional demolding methods for basin-type insulators are either screw-driven ejection or hydraulic cylinder ejection, with the ejection force applied to the end face of the center conductor of the basin-type insulator. When using a screw-driven ejection, the screw is threaded onto a nut seat fixed on the mold plate, and the product is ejected by rotating the screw. During ejection, the end face of the screw slides and rubs against the center conductor, which can easily damage the center conductor. When using a hydraulic cylinder ejection, the extension rod of the hydraulic cylinder extends and passes through the clearance hole on the mold plate, pressing against the center conductor of the basin-type insulator inside the mold cavity, thus reducing the risk of product damage.

[0004] However, since the center conductor needs to be fixed to the mold plate, currently a tension screw is used to insert into the threaded connection hole of the center conductor from the back side of the mold plate facing the cavity. During demolding, the tension screw needs to be removed first to loosen the center conductor, and then the hydraulic cylinder ejection mechanism is used for ejection. The hydraulic cylinder ejection mechanism is installed on the back side of the mold plate, and both the hydraulic cylinder ejection mechanism and the tension screw operate on the back side. To facilitate installation and operation and prevent interference between their operating spaces, the hydraulic cylinder ejection mechanism is detachably connected to the mold plate. Each demolding requires a loading and unloading operation. When installing the hydraulic cylinder ejection mechanism, installation errors can easily cause its position to shift, leading to misalignment of the telescopic rod. The telescopic rod may not be centered on the axis of the central conductor. For products with vent holes or small inserts on the flange of a basin-type insulator, each vent hole or insert has a corresponding core post during molding. When the telescopic rod is misaligned, the product can easily tilt. The product is subjected to a force biased to one side, pressing obliquely against the core post, making it difficult to demold. Forced demolding will cause secondary damage to the product, scratching the vent holes or inserts, or even causing cracks. Utility Model Content

[0005] The purpose of this utility model is to provide a demolding device for basin-type insulators, so as to solve the problem that the current demolding method using a hydraulic ejection mechanism is prone to uneven demolding due to the installation position deviation of the ejection mechanism.

[0006] The technical solution of this utility model's basin-type insulator demolding device is as follows: A pot-type insulator demolding device includes a template and a tensioning screw for screwing onto the template on the side of the template facing away from the cavity to fix the center conductor of the pot-type insulator to the template. It also includes an ejector piece passing through the template and a pushing mechanism for pushing the ejector piece. The ejector piece has an inner end for extending into the mold cavity and an outer end facing away from the mold cavity. The template is provided with a guide structure for guiding the ejector piece and a limiting structure for limiting the movement stroke of the ejector piece. The template is provided with a detachable mounting structure on the side facing away from the cavity for the pushing mechanism to be detachably connected. When in use, the pushing mechanism pushes the outer end of the ejector piece and guides it to move, thereby ejecting the center conductor out of the template through its inner end.

[0007] Furthermore, the guide structure includes a flexible guide sleeve, the ejector passing through the guide sleeve and tightly fitted with it, and the ejector moving relative to the guide sleeve when the pushing mechanism pushes the ejector.

[0008] Furthermore, the guide structure includes a fixing seat fixed to the template. The fixing seat has an axially penetrating central channel. The inner channel opening of the central channel is provided with a step. The step cooperates with the outer side of the template to form an installation groove for installing the guide sleeve to maintain the axial position of the guide sleeve.

[0009] Furthermore, the ejector has an outer baffle, and the inner wall of the central channel is provided with an inner baffle for engaging with the outer baffle to limit the inward movement of the ejector.

[0010] Furthermore, the ejector includes a main rod and an anti-detachment plate that are set separately. The diameter of the anti-detachment plate is larger than the diameter of the main rod. The anti-detachment plate is fixedly connected to the outer end of the main rod, and the outer end of the ejector is located at the anti-detachment plate.

[0011] Furthermore, the ejector is provided with a disc body at the inner end of the mold cavity, the disc body has a through hole for the tension screw to pass through, and the disc surface facing the cavity side of the disc body is used to push the central conductor.

[0012] Furthermore, the template is equipped with a positioning pin for inserting into the positioning hole of the central conductor, and the ejector is provided with a disc body at the inner end of the mold cavity. The disc body is provided with a through hole for the positioning pin to pass through, and the disc surface facing the cavity side of the disc body is used to push the central conductor.

[0013] Furthermore, the template is equipped with a locating pin for insertion into the threaded hole of the central conductor.

[0014] Furthermore, the jacking mechanism is provided with a clamping structure, which includes an outer clamping groove and an outer clamping platform. The loading and unloading structure includes a clamping adapter structure for the clamping structure to be loaded from one radial side. The clamping adapter structure includes an inner clamping platform that is adapted to be clamped into the outer clamping groove and an inner clamping groove for the outer clamping platform to be adapted to be clamped into. The inner clamping platform and the outer clamping platform are engaged in axial blocking cooperation.

[0015] Furthermore, the pushing mechanism includes a telescopic cylinder and an adapter nut. One end of the adapter nut is threaded onto the cylinder body of the telescopic cylinder, and the other end is provided with the aforementioned clamping structure. The telescopic rod of the telescopic cylinder is used to push the ejector component to move when it extends.

[0016] Beneficial effects: This utility model improves the demolding device for basin-type insulators. An ejector is guided and installed on the template. After removing the tensioning screws, the pushing mechanism is installed. The pushing mechanism pushes the ejector, which moves in a guiding manner, and the ejector pushes the center conductor to eject the molded basin-type insulator. The pushing mechanism is then removed after use. Because the separately installed ejector maintains its relative position to the template, and the pushing mechanism and ejector are in a pushing-fit relationship, positional deviations caused by the installation and removal of the pushing mechanism during demolding will not affect the application of pushing force to the ejector. This ensures that the ejector is centered and aligned with the center conductor, guaranteeing smooth demolding.

[0017] Furthermore, by setting up a flexible guide sleeve to form a tight fit with the ejector, the flexible guide sleeve can adapt to the thermal expansion of the mold, guiding while buffering the friction between the ejector and the template. While the flexible guide sleeve will wear, wearing down the guide sleeve is more reasonable than wearing down the template. The inner end of the ejector is pushed by a disc. The disc has through holes for the tension screw and locating pin to pass through, allowing for a larger disc area and a larger pushing contact surface. This facilitates force balance on the central conductor, ensuring smooth demolding without damaging the central conductor. The side-mounted loading and unloading structure formed by the slots and platforms greatly increases the ease of loading and unloading the ejector mechanism. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a basin-type insulator. Figure 2 This is a cross-sectional schematic diagram of the pushing mechanism during separation in an embodiment of the pot-type insulator demolding device of this utility model. Figure 3 This is a schematic diagram showing the installation relationship of various components in an embodiment of the basin-type insulator demolding device of this utility model; Figure 4 for Figure 3 A schematic diagram of the installation structure of the ejector plate relative to the positioning pin.

[0019] In the diagram: 100, basin insulator; 101, center conductor; 102, flange through hole; 103, flange insert; 104, threaded connection hole; 105, center positioning hole; 106, positioning pin hole; 1. Template; 2. Top rod; 20. Main rod body; 21. Disc body; 3. Anti-detachment plate; 4. Positioning pin; 5. Guide sleeve; 6. Fixing seat; 61. Side mounting slot; 7. Adapter nut; 71. Mounting head; 8. Hydraulic ejection device; 9. First fixing screw; 10. Second fixing screw; 11. Tensioning screw. Detailed Implementation

[0020] The basic concept of the pot-type insulator demolding device of this utility model is to set a separate guide ejector on the template. The installation position and the ejector position of the ejector mechanism are slightly different, which will not affect the pressing position of the ejector on the center conductor. This avoids affecting the force position of the center conductor when the ejector mechanism is installed or removed due to the need for operating space of the tightening screw, thus ensuring smooth demolding.

[0021] The following detailed description is provided in conjunction with specific embodiments. Embodiments of the basin-type insulator demolding device of this utility model: To facilitate understanding of this utility model, in conjunction with Figure 1 The structure of the basin insulator 100 is described below. The basin insulator 100 is a single-phase basin insulator. The basin insulator 100 includes a center conductor 101 and an insulating basin body surrounding the center conductor 101. The center conductor 101 and the insulating basin body are integrally cast. The center conductor 101 is also called a conductor insert and is used to connect the busbar or other conductors. A flange structure is provided on the outer edge of the insulating basin body. The flange has a flange through hole 102 and a flange insert 103. The flange through hole 102 is also a vent hole. The flange insert 103 can be one type or two types. The flange insert 103 has an axially penetrating inner hole. The end face of the center conductor 101 is provided with threaded connection holes 104, center positioning holes 105 and positioning pin holes 106. These holes are all blind holes. The center positioning hole 105 is coaxial with the center conductor 101. There are four threaded connection holes 104, located around the center positioning hole 105. The positioning pin holes 106 are located on one side of the center positioning hole 105 and have a smaller diameter than the other holes. There can be one or more of them. Each hole is used during the assembly of the basin insulator 100. The threaded connection holes 104 can be used to fix the busbar, and the positioning holes can be used to determine the installation direction during assembly.

[0022] When casting the basin-type insulator 100 using a mold, the center conductor 101 must be fixed to the mold. After molding, the center conductor 101 is demolded by pushing the corresponding end face of the center conductor 101.

[0023] like Figure 2 , Figure 3 , Figure 4As shown, the demolding device for the basin-type insulator includes a template 1, a tensioning screw, an ejector, and a pushing mechanism. The template 1 is the concave mold of the mold. In use, the concave and convex molds are vertically arranged and close horizontally. The figure only shows a part near the center conductor 101. The inner side of the template 1 is a cavity, and the center conductor 101 is located inside the mold cavity. The tensioning screw 11 is used to screw on the side of the template 1 away from the cavity and fix the center conductor 101 of the basin-type insulator 100 to the template 1. The tensioning screw 11 passes through the template 1 and is threaded into the corresponding threaded connection hole 104 of the center conductor 101. After tightening, it is fixed. An annular sealing groove is provided on the inner side of the template 1. A sealing ring is installed in the sealing groove. After the center conductor 101 is tightened, its end face presses against the sealing ring to ensure no glue leakage. A suitable safety distance is maintained in the area inside the sealing groove to allow space for the ejector and the tensioning screw 11.

[0024] The ejector includes an ejector rod 2 and an anti-detachment plate 3. The ejector is mounted on the template 1 and has an inner end for extending into the mold cavity and an outer end facing away from the mold cavity. The template 1 is provided with a guide structure for guiding the ejector and a limiting structure for limiting the movement stroke of the ejector. A pushing mechanism is used to push the ejector. The pushing mechanism includes a hydraulic ejection device 8 and an adapter nut 7. The template 1 has a detachable assembly structure on the side facing away from the cavity for the pushing mechanism to be detachably connected. When in use, the pushing mechanism pushes the outer end of the ejector and guides it to move, thereby pushing it out of the template 1 through its inner end against the center conductor 101, achieving demolding.

[0025] After removing the tension screws, install the ejector mechanism. The ejector mechanism pushes the ejector component, which moves to guide its movement. The ejector component pushes the center conductor 101, thus ejecting the formed basin-type insulator 100. Remove the ejector mechanism after use. When reinstalling the mold, install the tension screws to tighten the center conductor. Because the separately designed ejector component can maintain its relative position with the mold plate 1, the positional deviation caused by the installation and removal of the ejector mechanism during demolding will not affect the application of the ejector force. This ensures that the ejector component is centered and aligned with the center conductor 101, guaranteeing smooth demolding.

[0026] The guiding structure includes a flexible guide sleeve 5. The ejector passes through the guide sleeve and is tightly fitted with it. When the pushing mechanism pushes the ejector, the ejector moves relative to the guide sleeve. The guide sleeve is a polytetrafluoroethylene (PTFE) guide sleeve, which serves a guiding function while buffering the friction between the ejector rod and the template. In other embodiments, the guide sleeve may be omitted, and the template may be used to directly guide the ejector.

[0027] The guide structure includes a fixing seat 6 fixed to the template 1. The inner flange of the fixing seat 6 is fixedly connected to the outer surface of the template 1 by a second fixing screw 10. The fixing seat 6 has an axially penetrating central channel, which corresponds to the mounting hole on the template 1 for installing the ejector. The inner opening of the central channel has an inward step, which cooperates with the outer surface of the template 1 to form a mounting groove for installing the guide sleeve 5 to maintain the axial position of the guide sleeve. The guide sleeve 5 can be pressed tightly by the fixing seat 6 and the template 1. In other embodiments, the guide sleeve can also be directly installed in the annular groove on the inner wall of the mounting hole of the template.

[0028] The ejector rod 2 includes a main rod body 20 and a disc body 21. The main rod body 20 and the anti-detachment plate 3 are separately disposed. The diameter of the anti-detachment plate 3 is larger than the diameter of the main rod body 20. The anti-detachment plate 3 is fixedly connected to the outer end of the main rod body 20 by a first fixing screw 9. The outer end of the ejector is located at the anti-detachment plate 3. The portion of the anti-detachment plate 3 that protrudes radially from the main rod body 20 forms an outer baffle of the ejector. The inner wall of the central channel near the guide sleeve 5 is provided with an inner baffle for engaging with the outer baffle, forming a limiting structure to restrict the inward movement of the ejector and prevent over-movement. In other embodiments, the anti-detachment plate can also be integrally disposed with the main rod body 20, in which case the disc body is not required.

[0029] The disc body 21 of the ejector pin 2 forms the ejector located at the inner end of the mold cavity. The diameter of the disc body 21 is larger than the diameter of the main pin 20. The mounting holes on the template 1 are adapted to the disc body 21 and the main pin 20. The mounting holes include an outer straight hole section and an inner tapered hole section. The larger opening of the tapered hole section faces inward. The main pin 20 is adapted to pass through the straight hole section. The main pin 20 is provided with a milled flat surface, and the inner wall of the corresponding straight hole section has a matching plane, which can prevent the main pin 20 from rotating. The disc body 21 is located in the tapered hole section, and the outer circumferential surface of the disc body 21 is a matching tapered surface for easy ejection.

[0030] The template 1 is equipped with a positioning pin 4 for inserting into the positioning hole of the center conductor 101. The disc body 21 has through holes for the tension screw 11 to pass through and through holes for the positioning pin 4 to pass through. The disc surface of the disc body 21 facing the cavity is slightly lower than the mold surface when the mold is closed. This side of the disc surface is used to push the center conductor 101. A larger disc body 21 can be provided to form a larger pushing contact surface, which is beneficial to the center conductor 101 under force balance and smooth demolding, and will not damage the center conductor 101. In other embodiments, the disc body can also be made smaller and staggered from the tension screw and positioning pin.

[0031] In this embodiment, there are two types of positioning pins 4: one is thinner for insertion into the positioning pin hole 106 of the center conductor 101, and the other is thicker for insertion into the threaded hole of the center conductor 101. The center of the disc body 21 is also provided with a protrusion, which can be adapted to be inserted into the center positioning hole 105 of the center conductor 101 to improve positioning and force reliability.

[0032] The locating pin 4 has a larger outer diameter, forming a stop. The template 1 has a countersunk hole structure adapted to the locating pin 4. The stop is located in the larger section of the countersunk hole and is pressed and fixed by the fixing seat 6. The push rod 2 can move relative to the locating pin 4, and the locating pin 4 can guide the push rod 2. The anti-detachment plate 3 can move within the central channel of the fixing seat 6. The tension screw 11 passes through the fixing seat 6, the template 1, and the disc 21 and is connected to the central conductor 101. The end of the tension screw 11 can be pressed against the outer end face of the fixing seat 6.

[0033] The jacking mechanism is equipped with a locking structure, which includes an outer locking groove and an outer locking platform. The loading and unloading structure includes a locking adapter structure for the locking structure to be installed radially from one side. The locking adapter structure includes an inner locking platform that adapts to be locked into the outer locking groove and an inner locking groove for the outer locking platform to be locked into. The inner locking platform and the outer locking platform are axially stop-fitted. The hydraulic ejection device 8 constitutes the telescopic cylinder of the jacking mechanism. The telescopic cylinder is a hydraulic cylinder, including a cylinder body that can move relatively. One end of the adapter nut 7 is threaded to the cylinder body of the telescopic cylinder, and the other end is equipped with a locking structure. The telescopic rod of the telescopic cylinder is used to push the ejector to move when it extends.

[0034] The inner slot and inner platform of the snap-fit ​​structure are located at the outer end of the fixed base 6, forming a T-shaped groove structure. The T-shaped groove extends perpendicular to the axial direction of the fixed base 6, with one end open to form a side mounting entrance and the other end closed to form a side mounting slot 61. The outer platform and outer slot of the snap-fit ​​structure form a T-shaped snap-fit ​​head 71, which can be snapped into the side mounting slot 61 from one side, maintaining an axial relative position. At the same time, the snap-fit ​​head 71 stops rotating within the side mounting slot 61, maintaining stability. In other embodiments, screws can also be used to fix the pushing mechanism and the fixed base together, and the screws can be used to achieve loading and unloading.

[0035] The adapter nut 7 has an internal thread on its outer end, which mates with the external thread on the outer wall of the cylinder body of the hydraulic ejector device 8, allowing the adapter nut 7 to be fixed to the cylinder body. The side of the internal thread of the adapter nut facing away from the cylinder body is a smooth hole, with the inner diameter of the threaded section larger than the inner diameter of the smooth hole, allowing the smooth hole to avoid obstructing the telescopic rod. The outer diameter of the portion containing the clamping head 71 of the adapter nut 7 is smaller than the outer diameter of the portion containing the threaded section, allowing the adapter nut 7 to be adapted to connect mounting bases 6 and cylinder bodies of different sizes. The adapter nut 7 can be installed in place after the tension screw 11 is removed. This side-mounted structure makes installation and removal relatively convenient.

[0036] The locating pin 4 has a rounded front end to facilitate the installation of the center conductor 101 and the insertion of the ejector when returning to its original position. When demolding, first remove the tensioning screw 11, then insert the adapter nut of the hydraulic ejection mechanism, and the product can be ejected. Ejection is guided and has a large ejection surface, reducing the risk of misalignment. The fixing seat is fixed to the mold and does not require disassembly.

[0037] After the mold is assembled, it is placed on the tray of a trolley for pouring. After pouring, the trolley is pushed, sending the mold along with it into a primary curing oven for primary curing. After primary curing, the trolley with the mold is pushed out of the curing oven. The mold is lifted and placed on the demolding worktable, and any remaining pouring residue is cleaned from the outside of the mold. Using an electric wrench, the mold-closing bolts and tension bolts are loosened, and the mold-opening mechanism ejects the mold. The adapter nut is tightened onto the hydraulic ejection device and then locked into the slot of the fixing seat. Pressing the hydraulic ejection device ejects the product, achieving product demolding. After demolding, the product is sent to a secondary curing oven for secondary curing. After secondary curing, the product proceeds to the next process. This demolding device effectively reduces product waste caused by demolding problems.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A demolding device for a basin-type insulator, comprising a template and a tensioning screw for screwing onto the side of the template opposite to the cavity and fixing the center conductor of the basin-type insulator to the template, characterized in that, It also includes an ejector piece inserted into the template and a pushing mechanism for pushing the ejector piece. The ejector piece has an inner end for extending into the mold cavity and an outer end facing away from the mold cavity. The template is provided with a guide structure for guiding the ejector piece and a limiting structure for limiting the movement stroke of the ejector piece. The template is provided with a detachable mounting structure on the side facing away from the cavity for the pushing mechanism to be detachably connected. When the pushing mechanism is in use, it pushes the outer end of the ejector piece and guides it to move, thereby pushing the center conductor out of the template through its inner end.

2. The pot-type insulator demolding device according to claim 1, characterized in that, The guiding structure includes a flexible guide sleeve, an ejector that passes through the guide sleeve and is tightly fitted with it, and an ejector that moves relative to the guide sleeve when the ejector is pushed by the jacking mechanism.

3. The pot-type insulator demolding device according to claim 2, characterized in that, The guide structure includes a fixing seat that is fixed to the template. The fixing seat has an axially through central channel. The inner channel opening of the central channel is provided with a step. The step cooperates with the outer side of the template to form an installation groove for installing the guide sleeve to maintain the axial position of the guide sleeve.

4. The pot-type insulator demolding device according to claim 3, characterized in that, The ejector has an outer baffle, and the inner wall of the central channel is provided with an inner baffle for engaging with the outer baffle to limit the inward movement of the ejector.

5. The pot-type insulator demolding device according to any one of claims 1-4, characterized in that, The ejector consists of a main rod and an anti-detachment plate, which are separate parts. The diameter of the anti-detachment plate is larger than that of the main rod. The anti-detachment plate is fixedly connected to the outer end of the main rod, and the outer end of the ejector is located at the anti-detachment plate.

6. The pot-type insulator demolding device according to any one of claims 1-4, characterized in that, The ejector is provided with a disc at the inner end of the mold cavity. The disc has a through hole for the tension screw to pass through, and the disc surface facing the cavity is used to push the center conductor.

7. The pot-type insulator demolding device according to any one of claims 1-4, characterized in that, The template is equipped with a positioning pin for inserting into the positioning hole of the central conductor. The ejector is provided with a disc at the inner end of the mold cavity. The disc has a through hole for the positioning pin to pass through. The disc surface facing the cavity is used to push the central conductor.

8. The pot-type insulator demolding device according to any one of claims 1-4, characterized in that, The template is equipped with a locating pin for inserting into the threaded hole of the central conductor.

9. The pot-type insulator demolding device according to any one of claims 1-4, characterized in that, The jacking mechanism is equipped with a clamping structure, which includes an outer clamping groove and an outer clamping platform. The loading and unloading structure includes a clamping adapter structure for the clamping structure to be loaded from one radial side. The clamping adapter structure includes an inner clamping platform that is adapted to be clamped into the outer clamping groove and an inner clamping groove for the outer clamping platform to be adapted to be clamped into. The inner clamping platform and the outer clamping platform are engaged in axial blocking cooperation.

10. The pot-type insulator demolding device according to claim 9, characterized in that, The pushing mechanism includes a telescopic cylinder and an adapter nut. One end of the adapter nut is threaded onto the cylinder body of the telescopic cylinder, and the other end is equipped with the clamping structure. The telescopic rod of the telescopic cylinder is used to push the ejector component to move when it extends.

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