Clamping sleeve press-fitting device for zinc oxide resistor disc

Abstract

The utility model relates to a card sleeve press-fitting device for zinc oxide resistor discs, the press-fitting device comprises a mounting rack and a press-fitting mechanism, the mounting rack provides a mounting position and support for the press-fitting mechanism, the press-fitting mechanism comprises a lower pressing block, an upper pressing block and a press-fitting driving device, the lower pressing block is arranged on the mounting rack, the upper pressing block is arranged on the mounting rack through the press-fitting driving device, and the press-fitting driving device is arranged on the mounting rack. The upper pressing block is located above the lower pressing block, the lower surface of the upper pressing block is parallel and opposite to the upper surface of the lower pressing block, and the press-fitting driving device is used for driving the upper pressing block to move up and down so that the upper pressing block can be close to or away from the lower pressing block. Therefore, the press-fitting device can replace manual work to achieve press-fitting operation of the clamping sleeve, the production efficiency can be improved, the upper pressing block and the lower pressing block can be matched to evenly apply pressure to the resistor disc and the clamping sleeve, compared with manual sleeving, the clamping sleeve is stressed more evenly in the circumferential direction, and therefore even protection on the edge of the resistor disc is achieved, and the service life of the resistor disc is prolonged. And the generation of aluminum deviation of the resistor disc is reduced.

Description

Technical Field

[0001] This utility model relates to the field of surge arrester resistor manufacturing technology, and in particular to a ferrule pressing device for zinc oxide resistors. Background Technology

[0002] Lightning strikes are one of the main causes of power system failures. Surge arresters, as crucial lightning protection devices, are responsible for absorbing and releasing the energy of lightning strikes. Zinc oxide varistors are the core component of surge arresters, and their electrical performance determines the arrester's performance. During the use of zinc oxide surge arresters, when overvoltage-induced current passes through the arrester, a significant skin effect occurs, leading to repeated localized breakdowns at the edges during normal operation. A relatively stable and reliable solution to this problem is to leave an edge on the end face of the zinc oxide varistor during its fabrication. Specifically, during the aluminum electrode coating process, an edge must be left to ensure the edge insulation performance of the varistor. The quality of this edge leaving has a significant impact on the varistor's performance.

[0003] The current conventional method involves manually attaching ferrules to the resistor elements before spraying aluminum electrodes. For products with a diameter less than 85mm, taking D45 resistor elements as an example, approximately 1000 ferrules need to be attached per shift. Due to the entirely manual operation, production efficiency is low, and 8% of the aluminum is still misaligned, requiring rework and aluminum scraping. The misalignment of aluminum spraying on resistor elements largely depends on the parallelism of the ferrule attachment. For small-sized resistor elements, due to their small product area and limited protection zone, the traditional manual ferrule attachment method makes it difficult to guarantee uniform protection of the product edges by 0.3~0.5mm. Sometimes, the protection appears uniform on the surface, but because it is done manually, misalignment of the aluminum can still occur during the aluminum spraying process. Utility Model Content

[0004] The purpose of this invention is to provide a clamping device for zinc oxide resistor sheets, so as to replace manual clamping operations, improve production efficiency, improve the fitting effect, achieve uniform protection of the resistor sheet edges, and reduce the generation of aluminum bias in the resistor sheet.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A clamping device for zinc oxide resistor elements, comprising:

[0007] Mounting rack;

[0008] The pressing mechanism includes a lower pressing block, an upper pressing block, and a pressing drive device. The lower pressing block is disposed on the mounting frame, and the upper pressing block is disposed on the mounting frame via the pressing drive device, with the upper pressing block located above the lower pressing block. The pressing drive device is used to drive the upper pressing block to move up and down, so that the upper pressing block moves closer to or away from the lower pressing block.

[0009] In one embodiment of this application, the lower pressure block is adjustablely positioned on the mounting frame, and / or the pressing drive device is adjustablely positioned on the mounting frame, so that the gap between the upper pressure block and the lower pressure block is adjustable.

[0010] In one embodiment of this application, the lower pressure block is mounted on the mounting frame via a first adjusting bolt, the first adjusting bolt passing through a first threaded hole on the mounting frame and rotatably connected to the lower pressure block, and / or, the press-fitting drive device is mounted on the mounting frame via a second adjusting bolt, the second adjusting bolt passing through a second threaded hole on the mounting frame and rotatably connected to the press-fitting drive device.

[0011] In one embodiment of this application, the mounting bracket is provided with a horizontal adjustment device, which is used to adjust the working surface of the lower pressure block to be horizontal.

[0012] In one embodiment of this application, the leveling device includes adjusting support feet and a level. A plurality of adjusting support feet are circumferentially spaced at the bottom of the mounting frame, and the level is mounted on the mounting frame. One of the adjusting support feet and the mounting frame is provided with an adjusting stud, and the other of the adjusting support feet and the mounting frame is provided with a third threaded hole. The adjusting stud and the third threaded hole are threadedly engaged.

[0013] In one embodiment of this application, the press-fitting drive device is a piston cylinder, or the press-fitting drive device is a linear motor, or the press-fitting drive device includes a rotary motor and a transmission mechanism.

[0014] In one embodiment of this application, the press-fitting drive device includes:

[0015] A cylinder, wherein the piston rod of the cylinder is connected to the upper pressure block;

[0016] An air supply device is connected to the cylinder to form a pneumatic circuit.

[0017] In one embodiment of this application, the gas supply device includes:

[0018] An air source, which is connected to the cylinder;

[0019] A pressure regulating valve is provided on the connecting pipeline between the air source and the cylinder;

[0020] A pneumatic switch is connected to the air pressure regulating valve to control the opening and closing of the air pressure regulating valve.

[0021] In one embodiment of this application, the working surface of the lower pressing block is provided with a first limiting groove for limiting the resistor sheet, and the working surface of the upper pressing block is provided with a second limiting groove for limiting the sleeve.

[0022] As can be seen from the above technical solutions, this utility model discloses a ferrule pressing device for zinc oxide resistor sheets. The ferrule pressing device for zinc oxide resistor sheets includes a mounting frame and a pressing mechanism. The mounting frame provides an installation position and support for the pressing mechanism. The pressing mechanism includes a lower pressing block, an upper pressing block, and a pressing drive device. The lower pressing block is disposed on the mounting frame, and the upper pressing block is disposed on the mounting frame through the pressing drive device. The upper pressing block is located above the lower pressing block, and the lower surface of the upper pressing block is parallel to the upper surface of the lower pressing block. That is, the working surface of the upper pressing block is parallel to the working surface of the lower pressing block. The pressing drive device is used to drive the upper pressing block to move up and down so that the upper pressing block moves closer to or away from the lower pressing block.

[0023] In application, the resistor sheet is placed on the working surface of the lower pressing block, and the first ferrule is placed coaxially with the resistor sheet. The pressing drive device is activated, driving the upper pressing block to press down at a preset speed, fitting the first ferrule onto the resistor sheet. The resistor sheet is then flipped over, and the second ferrule is placed coaxially with the resistor sheet. The pressing drive device is activated again, driving the upper pressing block to press down at a preset speed, fitting the second ferrule onto the resistor sheet. The position of the resistor sheet is then repeatedly adjusted. After each adjustment, the pressing drive device is activated again to press any loose first or second ferrule until both ferrules are properly fitted. It is evident that the aforementioned zinc oxide resistor sheet ferrule pressing device can replace manual labor in the ferrule pressing operation. This improves production efficiency, and the upper and lower pressure blocks work together to apply uniform pressure to the resistor sheet and ferrule. Compared to manual assembly, the ferrule experiences more uniform force circumferentially, thus providing uniform protection for the resistor sheet edges and reducing aluminum oxide buildup. This effectively lowers the rework rate of resistor sheet grinding. For example, the eccentricity of small-sized resistor sheets is reduced from 8% to below 0.5%, and the edge breakdown rate of square wave screening is reduced from approximately 5% before application to approximately 0.5% after application. This effectively reduces production energy consumption, aligning with the current societal advocacy of energy conservation and emission reduction. The improved pass rate increases the output per shift for resistor sheets. For example, the output per shift for small-sized resistor sheets can be increased from 1000 to 2500 sheets, thereby reducing the manufacturing cost of resistor sheets. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the ferrule press-fitting device for zinc oxide resistor sheets provided in an embodiment of the present invention.

[0026] In the picture:

[0027] 1 is the mounting bracket; 2 is the upper pressure block; 3 is the lower pressure block; 4 is the second adjusting bolt; 5 is the cylinder; 6 is the piston rod; 7 is the adjusting support foot; 8 is the resistance element; 9 is the clamping sleeve. Detailed Implementation

[0028] The core of this utility model is to provide a ferrule pressing device for zinc oxide resistor sheets. The structural design of this ferrule pressing device enables it to replace manual ferrule pressing operations, improves production efficiency, enhances the fitting effect, achieves uniform protection of the resistor sheet edges, and reduces the generation of aluminum bias in the resistor sheet.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1 , Figure 1 This is a schematic diagram of the ferrule press-fitting device for zinc oxide resistor sheets provided in an embodiment of the present invention.

[0031] This utility model discloses a ferrule pressing device for zinc oxide resistor sheets, which includes a mounting frame 1 and a pressing mechanism.

[0032] The mounting frame 1 provides an installation position and support for the pressing mechanism. The mounting frame 1 should have sufficient strength to provide effective support. In this case, the mounting frame 1 can be made of materials such as steel and aluminum alloy.

[0033] The pressing mechanism includes a lower pressing block 3, an upper pressing block 2, and a pressing drive device. The lower pressing block 3 is mounted on the mounting frame 1, and the upper pressing block 2 is mounted on the mounting frame 1 via the pressing drive device. The upper pressing block 2 is located above the lower pressing block 3, and the lower surface of the upper pressing block 2 is parallel to the upper surface of the lower pressing block 3. That is, the working surface of the upper pressing block 2 is parallel to the working surface of the lower pressing block 3. The pressing drive device is used to drive the upper pressing block 2 to move up and down so that the upper pressing block 2 moves closer to or away from the lower pressing block 3.

[0034] In application, the resistor 8 is placed on the working surface of the lower pressing block 3, and the first ferrule 9 is placed coaxially with the resistor 8 on the resistor 8. The pressing drive device is started, and the pressing drive device drives the upper pressing block 2 to press down at a preset speed to put the first ferrule 9 into the resistor 8. The resistor 8 is flipped over, and the second ferrule 9 is placed coaxially with the resistor 8 on the resistor 8. The pressing drive device is started again, and the pressing drive device drives the upper pressing block 2 to press down at a preset speed to put the second ferrule 9 into the resistor 8. The position of the resistor 8 is then repeatedly adjusted. After each adjustment, the pressing drive device is started again to press the first ferrule 9 or the second ferrule 9 that is not pressed tightly again until the first ferrule 9 and the second ferrule 9 are pressed into place.

[0035] Compared with the prior art, the zinc oxide resistor sheet clamping device provided in this embodiment can replace manual labor to perform clamping operations, which can improve production efficiency. The upper clamping block 2 and the lower clamping block 3 can work together to apply uniform pressure to the resistor sheet 8 and the clamping block 9. Compared with manual clamping, the clamping block 9 is subjected to more uniform force in the circumferential direction, thereby achieving uniform protection of the edge of the resistor sheet 8, reducing the generation of aluminum off-center on the resistor sheet 8, and effectively reducing the rework rate of the resistor sheet 8. Taking small-size resistor sheet 8 as an example, the eccentricity of small-size resistor sheet 8 is reduced from 8% to below 0.5%, and the edge breakdown rate of square wave screening is reduced from about 5% before application to about 0.5% after application. This can effectively reduce production energy consumption, which is in line with the energy conservation and emission reduction concept advocated by the current society. The improved pass rate increases the output of resistor sheet 8 per shift. Taking small-size resistor sheet 8 as an example, its output per shift can be increased from 1,000 pieces to 2,500 pieces, thereby reducing the manufacturing cost of resistor sheet 8.

[0036] Since resistors 8 of different specifications need to be pressed, the initial gap between the lower pressing block 3 and the upper pressing block 2 needs to be adjustable. In one embodiment of this application, in order to make the initial gap between the lower pressing block 3 and the upper pressing block 2 adjustable, the lower pressing block 3 is adjustablely positioned on the mounting frame 1, and / or the pressing drive device is adjustablely positioned on the mounting frame 1, so that the gap between the upper pressing block 2 and the lower pressing block 3 is adjustable. That is, the initial gap between the upper pressing block 2 and the lower pressing block 3 can be adjusted by simply adjusting the upper and lower positions of the lower pressing block 3, or the upper pressing block 2 can be adjusted by simply adjusting the upper and lower positions of the pressing drive device, thereby adjusting the initial gap between the upper pressing block 2 and the lower pressing block 3. Of course, the upper and lower positions of the lower pressing block 3 and the pressing drive device can be adjusted simultaneously to achieve the purpose of adjusting the initial gap between the upper pressing block 2 and the lower pressing block 3.

[0037] Specifically, in one embodiment of this application, to adjust the position of the lower pressure block 3, the lower pressure block 3 is mounted on the mounting bracket 1 via a first adjusting bolt. The first adjusting bolt passes through a first threaded hole on the mounting bracket 1 and is rotatably connected to the lower pressure block 3. One or more first adjusting bolts can be provided. When only one first adjusting bolt is provided, the first adjusting bolt is preferably located at the center of the lower pressure block 3, and multiple support rods are provided at intervals around the first adjusting bolt. The support rods are rotatably connected to the lower pressure block 3 to guide and support the lower pressure block 3. Of course, multiple first adjusting bolts can also be provided. Bolts are arranged at intervals around the lower pressure block 3. In application, the upper and lower positions of the lower pressure block 3 can be adjusted by rotating the first adjusting bolt. And / or, the press-fitting drive device is set on the mounting frame 1 by the second adjusting bolt 4. The second adjusting bolt 4 passes through the second threaded hole on the mounting frame 1 and is rotatably connected to the press-fitting drive device. The second adjusting bolt 4 passes through the housing of the press-fitting drive device and is threadedly engaged with the second threaded hole on the mounting frame 1. It is best to arrange multiple second adjusting bolts 4 around the circumference of the press-fitting drive device. When it is necessary to adjust the position of the upper pressure block 2, each second adjusting bolt 4 can be rotated.

[0038] To ensure that the working surfaces of the upper pressure block 2 and the lower pressure block 3 are level, in one embodiment of this application, the mounting frame 1 is provided with a leveling device. The leveling device is used to adjust the working surface of the lower pressure block 3 to be level. Specifically, the leveling device includes adjusting support feet 7 and a level. Multiple adjusting support feet 7 are spaced apart circumferentially at the bottom of the mounting frame 1, and the level is located on the mounting frame 1. One of the adjusting support feet 7 and the mounting frame 1 is provided with an adjusting stud, and the other adjusting support foot 7 and the mounting frame 1 are provided with a third threaded hole. The adjusting stud and the third threaded hole are threadedly engaged.

[0039] The press-fitting drive device is used to drive the upper press block 2 to move up and down in a straight line. In some embodiments of this application, the press-fitting drive device is a piston cylinder, which includes a pneumatic cylinder 5 or a hydraulic cylinder. Alternatively, the press-fitting drive device is a linear motor, or the press-fitting drive device includes a rotary motor and a transmission mechanism. The transmission mechanism is used to convert the rotation of the rotary motor into linear motion. The transmission mechanism includes, but is not limited to, a gear and rack mechanism, a cam and connecting rod mechanism, and a lead screw and slider mechanism.

[0040] Specifically, in one embodiment of this application, the press-fitting drive device includes a cylinder 5 and an air supply device. The piston rod 6 of the cylinder 5 is connected to the upper pressure block 2, and the air supply device is connected to the cylinder 5 to form a pneumatic circuit.

[0041] Furthermore, in the above embodiments, the air supply device includes an air source, an air pressure regulating valve, and a pneumatic switch. The air source is connected to the cylinder 5, and the air pressure regulating valve is installed on the connecting pipeline between the air source and the cylinder 5. The air pressure regulating valve can function as a pneumatic circuit switch and can also regulate the air pressure in the connecting pipeline, thereby regulating the air pressure output to the cylinder 5. The pneumatic switch is connected to the air pressure regulating valve to control the opening and closing of the air pressure regulating valve.

[0042] To further optimize the above technical solution, the pneumatic switch is a foot-operated pneumatic switch, which can free up the hands of production personnel to facilitate the operation of the resistor 8 and the ferrule 9.

[0043] To prevent the resistor 8 from moving relative to the lower pressing block 3 during the pressing process, and to facilitate the placement of the resistor 8 by production personnel, in one embodiment of this application, a first limiting groove for limiting the resistor 8 is provided on the working surface of the lower pressing block 3, and a second limiting groove for limiting the sleeve 9 is provided on the working surface of the upper pressing block 2. During the pressing process, the first limiting groove limits the resistor 8, and the second limiting groove limits the sleeve 9.

[0044] Since the resistor piece 8 needs to be flipped over and the other side's ferrule 9 needs to be pressed after pressing one side of the ferrule 9, the first limiting groove is a stepped groove. The lower groove with a smaller diameter is used to cooperate with the resistor piece 8 without the ferrule 9, and the upper groove with a larger diameter is used to cooperate with the resistor piece 8 with the ferrule 9. The two grooves of the upper and lower layers are coaxially arranged.

[0045] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0046] It should be understood that the use of terms such as "system," "device," "unit," and / or "module" in this application is merely one method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0047] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0048] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0049] If a flowchart is used in this application, it is used to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0050] It should also be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the article or device that includes the aforementioned element.

[0051] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A clamping device for zinc oxide resistor elements, characterized in that, include: Mounting rack; The pressing mechanism includes a lower pressing block, an upper pressing block, and a pressing drive device. The lower pressing block is disposed on the mounting frame, and the upper pressing block is disposed on the mounting frame via the pressing drive device, with the upper pressing block located above the lower pressing block. The pressing drive device is used to drive the upper pressing block to move up and down, so that the upper pressing block moves closer to or away from the lower pressing block.

2. The ferrule pressing device for zinc oxide resistor sheets according to claim 1, characterized in that, The lower pressure block is adjustablely positioned on the mounting frame, and / or the pressing drive device is adjustablely positioned on the mounting frame, so that the gap between the upper pressure block and the lower pressure block is adjustable.

3. The ferrule pressing device for zinc oxide resistor sheets according to claim 2, characterized in that, The lower pressure block is mounted on the mounting frame via a first adjusting bolt, the first adjusting bolt passing through a first threaded hole on the mounting frame and rotatably connected to the lower pressure block, and / or, the press-fitting drive device is mounted on the mounting frame via a second adjusting bolt, the second adjusting bolt passing through a second threaded hole on the mounting frame and rotatably connected to the press-fitting drive device.

4. The ferrule pressing device for zinc oxide resistor sheets according to any one of claims 1-3, characterized in that, The mounting bracket is equipped with a horizontal adjustment device, which is used to adjust the working surface of the lower pressure block to be horizontal.

5. The ferrule pressing device for zinc oxide resistor sheets according to claim 4, characterized in that, The leveling device includes adjusting support feet and a level. Multiple adjusting support feet are circumferentially spaced at the bottom of the mounting frame. The level is mounted on the mounting frame. One of the adjusting support feet and the mounting frame is provided with an adjusting stud, and the other of the adjusting support feet and the mounting frame is provided with a third threaded hole. The adjusting stud and the third threaded hole are threadedly engaged.

6. The ferrule press-fitting device for zinc oxide resistor sheets according to any one of claims 1-3, characterized in that, The press-fitting drive device is a piston cylinder, or the press-fitting drive device is a linear motor, or the press-fitting drive device includes a rotary motor and a transmission mechanism.

7. The ferrule pressing device for zinc oxide resistor sheets according to claim 6, characterized in that, The press-fitting drive device includes: A cylinder, wherein the piston rod of the cylinder is connected to the upper pressure block; An air supply device is connected to the cylinder to form a pneumatic circuit.

8. The ferrule pressing device for zinc oxide resistor sheets according to claim 7, characterized in that, The gas supply device includes: An air source, which is connected to the cylinder; A pressure regulating valve is provided on the connecting pipeline between the air source and the cylinder; A pneumatic switch is connected to the air pressure regulating valve to control the opening and closing of the air pressure regulating valve.

9. The ferrule pressing device for zinc oxide resistor sheets according to any one of claims 1-3, characterized in that, The working surface of the lower pressure block is provided with a first limiting groove for limiting the resistor sheet, and the working surface of the upper pressure block is provided with a second limiting groove for limiting the sleeve.

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