A kind of dip paint tool of electromagnetic pump

Abstract

The utility model discloses a kind of paint dipping tool of electromagnetic pump, including positioning cylinder assembly and sealing plate assembly, the positioning cylinder assembly is the cylindrical that is made of at least two groups of arc plate, the sealing plate assembly includes first sealing plate and second sealing plate, the first sealing plate and the second sealing plate are respectively arranged in the two ends of the positioning cylinder assembly and connect the arc plate.The positioning cylinder assembly can position product, ensure the paint dipping effect of stator and coil, the positioning cylinder assembly is made of multiple arc plate, after paint dipping is completed, the disassembly of positioning cylinder is facilitated, the arc plate in the positioning cylinder assembly can be connected by sealing plate assembly Forming cylindrical structure, improve the positioning effect of positioning cylinder assembly to product.The electromagnetic pump coil and stator formed by the scheme paint dipping, can reduce or eliminate the gap between stator and coil, to improve the heat dissipation effect of coil, improve the service life of coil.

Description

Technical Field

[0001] This utility model relates to a paint impregnation fixture, and more specifically, to a paint impregnation fixture for an electromagnetic pump. Background Technology

[0002] Conventional electromagnetic pumps assemble with a stator after single-coil impregnation and curing. A gap remains between the coil and stator. During operation, under the long-term effects of electromagnetic force, electromagnetic vibration, and the mechanical forces of thermal expansion and contraction, the coil insulation is continuously worn down by the stator, leading to reduced insulation reliability. Simultaneously, the gap reduces the coil's heat dissipation capacity, resulting in higher operating temperatures. To eliminate the gap between the coil and stator assembly, making them a unified whole and improving their mechanical performance and overall lifespan, integral impregnation is necessary. While the electromagnetic pump coil is radially positioned using the pump groove insulation layer during assembly, the impregnated insulation layer fails to meet insulation requirements. Therefore, a detachable impregnation fixture needs to be designed to solve the problems of coil positioning before impregnation and fixture disassembly after impregnation and curing.

[0003] For example, Chinese Patent Publication No. CN113054779A, published on June 29, 2021, entitled "Electromagnetic Coil for Liquid Metal Electromagnetic Pump and its Impregnation and Curing Method," discloses an impregnation and curing method for an electromagnetic pump coil, comprising: impregnating the electromagnetic coil with varnish and curing the impregnated coil. The impregnation process includes the following steps performed sequentially: an impregnation and varnish removal step: impregnating the electromagnetic coil in a container containing varnish, and removing the varnish from the container after impregnation; a negative pressure settling step: maintaining the electromagnetic coil under negative pressure for a preset time; and a pressure restoration step after the negative pressure settling step: restoring the pressure in the container to normal pressure. When this method directly winds the impregnated electromagnetic pump coil onto the stator, gaps easily form between the stator and the coil. During long-term use, the coil insulation will be continuously worn down by the stator, reducing the coil's lifespan. Utility Model Content

[0004] This invention overcomes the problem that gaps easily exist between the coil and stator of existing electromagnetic pumps, which can lead to reduced performance of the electromagnetic pump. It provides an impregnation fixture for electromagnetic pumps. The electromagnetic pump coil and stator formed by this solution can reduce or eliminate the gap between the stator and the coil, thereby improving the heat dissipation effect of the coil and extending its service life.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a coating impregnation fixture for an electromagnetic pump, comprising a positioning cylinder assembly and a sealing plate assembly. The positioning cylinder assembly is a cylindrical shape composed of at least two sets of arc-shaped plates. The sealing plate assembly includes a first sealing plate and a second sealing plate, which are respectively disposed at both ends of the positioning cylinder assembly and connect the arc-shaped plates. The positioning cylinder assembly can position the product (a combination of winding coil and stator core) to ensure the coating impregnation effect of the stator and coil. The positioning cylinder assembly is composed of multiple arc-shaped plates, which facilitates the disassembly of the positioning cylinder after coating is completed. The sealing plate assembly can connect the arc-shaped plates in the positioning cylinder assembly to form a cylindrical structure, thereby improving the positioning effect of the positioning cylinder assembly on the product.

[0006] Preferably, the positioning cylinder assembly has a radially outwardly arranged limiting step on the side near the first sealing plate, and the limiting step has a first connecting hole. The first sealing plate and the limiting step are fixedly connected to the first connecting hole. The limiting step can provide support and positioning for the product, and the first sealing plate can connect the limiting steps on the positioning cylinder assembly together, so that the positioning cylinder assembly forms a cylindrical structure.

[0007] Preferably, the first sealing plate is provided with a drain hole that connects to the internal cavity of the positioning cylinder assembly. A drain hole is also provided on the lower sealing plate to facilitate the drainage of the insulating varnish after the coil is impregnated.

[0008] Preferably, the positioning cylinder assembly has a radially inwardly arranged connecting portion on the side near the second sealing plate, and the connecting portion has a second connecting hole. The second sealing plate and the connecting portion are fixedly connected to the second connecting hole. The connecting portion on the upper part of the positioning cylinder assembly is used to connect to the second sealing plate, so that the positioning cylinder can be fixedly formed without affecting the assembly of tooling and products.

[0009] Preferably, the arc-shaped plates are in four groups, and the connecting surfaces between the arc-shaped plates are beveled. The arc-shaped plates are designed with four petals, and the circumferential contact surfaces are beveled, which facilitates the assembly and disassembly of the arc-shaped plates before and after the paint impregnation process.

[0010] Preferably, the second sealing plate is provided with a lifting connection. The lifting connection can lift the impregnation fixture into or out of the impregnation tank, facilitating the movement of the fixture.

[0011] Preferably, the positioning cylinder assembly is provided with a diaphragm on its exterior. The diaphragm can isolate the winding coil and the positioning cylinder during the impregnation process, facilitating the removal of the tooling and preventing damage to the coil.

[0012] Preferably, the positioning cylinder assembly is a cylindrical cylinder with a cylindricity tolerance of 0.1 mm. Improving the cylindricity of the positioning cylinder can ensure the positional accuracy of the winding coil and reduce the gap between the stator and the coil.

[0013] Preferably, the lifting connection part has a through-hole structure. This through-hole design not only facilitates the lifting of the tooling but also allows for the lifting of the equipment to drain excess paint after the coating process.

[0014] Compared with the prior art, the beneficial effects of this utility model are: (1) The impregnation tooling structure of this solution is simple, the cost of use is low, and the method of use is simple; (2) It can realize the overall impregnation of the winding coil and stator core of the electromagnetic pump, eliminate or reduce the gap between the stator core and the winding coil, increase the heat dissipation capacity, thereby improving the mechanical and electrical performance of the coil and greatly increasing its service life. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the present invention.

[0016] Figure 2 for Figure 1 A cross-sectional view along the AA direction.

[0017] In the figure: 1. Positioning cylinder assembly, 11. First arc plate, 12. Second arc plate, 21. First sealing plate, 22. Second sealing plate, 3. Limiting step, 4. Drain hole, 5. Connecting part, 6. Lifting connecting part, 7. Winding coil, 8. Stator core. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0019] Example 1: As Figure 1 and Figure 2 The illustrated electromagnetic pump impregnation fixture includes a positioning cylinder assembly 1 and a sealing plate assembly. The positioning cylinder assembly 1 is formed by assembling and connecting multiple detachable arc-shaped plates to form a cylindrical structure. Sealing plate assemblies are provided at both ends of the positioning cylinder assembly 1. The sealing plate assemblies can connect the arc-shaped plates, so that the arc-shaped plates can be fixed to form the positioning cylinder assembly 1. The positioning cylinder assembly 1 can position and fix the product (a combination of winding coil 7 and stator core 8), which facilitates the product's impregnation operation in the paint tank.

[0020] Furthermore, in this embodiment, the arc-shaped plate includes a first arc-shaped plate 11 and a second arc-shaped plate 12, and each of the first arc-shaped plate 11 and the second arc-shaped plate 12 is provided in two sets, such as... Figure 2 As shown, the circumferential length of the first arc plate 11 is greater than the circumferential length of the second arc plate 12. The first arc plate 11 and the second arc plate 12 are arranged alternately to form a complete cylindrical structure, that is, to form a positioning cylinder.

[0021] Furthermore, the sealing plate assembly includes a first sealing plate 21 and a second sealing plate 22, which are located at the lower end and the upper end of the positioning cylinder assembly 1, respectively, and are fixedly connected to the upper end and the lower end of the positioning cylinder assembly 1, respectively.

[0022] A limiting step 3 is provided at the lower part of the positioning cylinder assembly 1. The limiting step 3 is a plate structure protruding radially outward from the positioning cylinder assembly 1. The limiting step 3 and the arc-shaped plate are integrally formed. That is, the bottom of the first arc-shaped plate 11 and the bottom of the second arc-shaped plate 12 are both provided with limiting steps 3. The limiting steps 3 face radially outward from the positioning cylinder assembly 1. When the first arc-shaped plate 11 and the second arc-shaped plate 12 are connected to form a cylinder, the limiting step 3 can form a complete circular structure. The limiting step 3 can provide support and positioning for the stator core 8 and the winding coil 7. When the product is placed in the paint tank for varnishing using a varnishing fixture, the limiting step 3 can support the product during varnishing in the paint tank. A connecting part 5 is provided on the upper part of the positioning cylinder assembly 1. The connecting part 5 is a plate structure protruding on the radial inner side of the positioning cylinder assembly 1. The connecting part 5 and the arc plate are also integrally formed. That is, the top of the first arc plate 11 and the second arc plate 12 are both provided with the connecting part 5. The connecting part 5 faces the radial inner side of the positioning cylinder assembly 1. When the first arc plate 11 and the second arc plate 12 are connected to form a cylinder, the connecting part 5 can form a complete circular structure.

[0023] Both the connecting part 5 and the limiting step 3 can be connected to the sealing plate assembly. The connecting part 5 is fixedly connected to the second sealing plate 22, and the limiting step 3 is connected to the first sealing plate 21. Both the first and second sealing plates 21 and 22 are circular structures, and their radial dimensions match the radial dimensions of the cylinder formed by the arc-shaped plates. Since the positioning cylinder assembly 1 is a cylindrical structure formed by four sets of arc-shaped plates, it has a hollow interior. This not only significantly reduces the weight of the tooling and lowers costs but also facilitates assembly and operation. The first and second sealing plates 21 and 22 can seal the through holes at both ends of the positioning cylinder and simultaneously fix the first and second sealing plates 21 and 22 at their respective positions.

[0024] Furthermore, a first connecting hole is provided on the limiting step 3, and a bolt hole is also provided on the first sealing plate 21 at the position corresponding to the first connecting hole. Bolts or other connecting components can be used to fix the first sealing plate 21 to the limiting step 3 at the bottom of the positioning cylinder assembly 1. A second connecting hole is provided on the connecting part 5, and a bolt hole is provided on the second sealing plate 22 at the position corresponding to the second connecting hole. Bolts or other connecting components can be used to fix the second sealing plate 22 to the connecting part at the top of the positioning cylinder assembly 1.

[0025] The bottom first sealing plate 21 is provided with a drain hole 4, which is located in the middle of the first sealing plate 21 and connects the outside to the inner cavity of the positioning cylinder assembly 1. After the paint impregnation is completed, there will be paint in the inner cavity of the positioning cylinder assembly 1. The paint in the positioning cylinder assembly 1 can be drained through the drain hole 4.

[0026] Example 2: Figure 1 and Figure 2 The illustrated electromagnetic pump impregnation fixture includes a positioning cylinder assembly 1 and a sealing plate assembly. The positioning cylinder assembly 1 is formed by assembling and connecting multiple detachable arc-shaped plates to form a cylindrical structure. Sealing plate assemblies are provided at both ends of the positioning cylinder assembly 1. The sealing plate assemblies can connect the arc-shaped plates, so that the arc-shaped plates can be fixed to form the positioning cylinder assembly 1. The positioning cylinder assembly 1 can position and fix the product, which facilitates the product impregnation operation in the paint tank.

[0027] The curved plate includes a first curved plate 11 and a second curved plate 12, and each of the first curved plate 11 and the second curved plate 12 is provided in two sets, such as... Figure 2 As shown, the circumferential length of the first arc-shaped plate 11 is greater than the circumferential length of the second arc-shaped plate 12. The first arc-shaped plate 11 and the second arc-shaped plate 12 are arranged alternately to form a complete cylindrical structure, that is, to form a positioning cylinder. The sealing plate assembly includes a first sealing plate 21 and a second sealing plate 22. The first sealing plate 21 and the second sealing plate 22 are located at the lower end and the upper end of the positioning cylinder assembly 1, respectively, and are fixedly connected to the upper end and the lower end of the positioning cylinder assembly 1, respectively.

[0028] A limiting step 3 is provided at the lower part of the positioning cylinder assembly 1. The limiting step 3 is a plate structure protruding radially outward from the positioning cylinder assembly 1. The limiting step 3 and the arc-shaped plate are integrally formed. That is, the bottom of the first arc-shaped plate 11 and the bottom of the second arc-shaped plate 12 are both provided with limiting steps 3. The limiting steps 3 face radially outward from the positioning cylinder assembly 1. When the first arc-shaped plate 11 and the second arc-shaped plate 12 are connected to form a cylinder, the limiting step 3 can form a complete circular structure. The limiting step 3 can provide support and positioning for the stator core 8 and the winding coil 7. When the product is placed in the paint tank for varnishing using a varnishing fixture, the limiting step 3 can support the product during varnishing in the paint tank. A connecting part 5 is provided on the upper part of the positioning cylinder assembly 1. The connecting part 5 is a plate structure protruding on the radial inner side of the positioning cylinder assembly 1. The connecting part 5 and the arc plate are also integrally formed. That is, the top of the first arc plate 11 and the second arc plate 12 are both provided with the connecting part 5. The connecting part 5 faces the radial inner side of the positioning cylinder assembly 1. When the first arc plate 11 and the second arc plate 12 are connected to form a cylinder, the connecting part 5 can form a complete circular structure.

[0029] Both the connecting part 5 and the limiting step 3 can be connected to the sealing plate assembly. Specifically, the connecting part 5 is fixedly connected to the second sealing plate 22, and the limiting step 3 is connected to the first sealing plate 21. Both the first and second sealing plates 21 and 22 are circular structures, and their radial dimensions match the radial dimensions of the cylinder formed by the arc-shaped plates. Since the positioning cylinder assembly 1 is a cylindrical structure formed by four sets of arc-shaped plates, it has a hollow interior, which significantly reduces the weight of the tooling, lowers costs, and facilitates assembly and operation. The first and second sealing plates 21 and 22 can seal the through holes at both ends of the positioning cylinder and fix them at their respective positions. Specifically, a first connecting hole is provided on the limiting step 3, and bolt holes are also provided on the first sealing plate 21 at the corresponding positions. Bolts or other connecting components can be used to fix the first sealing plate 21 to the limiting step 3 at the bottom of the positioning cylinder assembly 1. A second connecting hole is provided on the connecting part 5, and a bolt hole is provided on the second sealing plate 22 at the position corresponding to the second connecting hole. The second sealing plate 22 can be fixedly connected to the connecting part at the top of the positioning cylinder assembly 1 by using bolts or other connecting parts.

[0030] A drain hole 4 is also provided in the first sealing plate 21 at the bottom. The drain hole 4 is located in the middle of the first sealing plate 21 and connects the outside and the inner cavity of the positioning cylinder assembly 1. After the paint is impregnated, there will be paint in the inner cavity of the positioning cylinder assembly 1. The paint in the positioning cylinder assembly 1 can be drained through the drain hole 4.

[0031] In this embodiment, there are four sets of curved plates, and the circumferential splicing surface of the four sets of curved plates is an inclined surface, such as... Figure 2 As shown, the adjacent connecting surfaces of the first arc-shaped plate 11 and the second arc-shaped plate 12 are identical and can fit together. However, the connecting surfaces of the two are not along the radial direction of the positioning cylinder assembly 1, but are arranged at an angle to the radial direction. This not only facilitates the assembly between the arc-shaped plates, but also facilitates the disassembly work after impregnation, avoiding damage to the impregnated product.

[0032] A lifting connection part 6 is also provided on the second sealing plate 22 at the top of the positioning cylinder assembly 1. The lifting connection part 6 can lift the tooling, that is, it can lift the product placed in the tooling into or out of the paint can. Specifically, the lifting connection part 6 has a through hole structure.

[0033] It should also be noted that a diaphragm (not shown in the figure) is also wrapped around the positioning cylinder formed by the first arc plate 11 and the second arc plate 12. The diaphragm separates the product and the positioning cylinder assembly 1, preventing direct contact between the two. This makes it less likely for the stator core 8, winding coil 7, and positioning cylinder assembly 1 to stick together, facilitating subsequent tooling disassembly and preventing damage to the coated product. Specifically, in this embodiment, the diaphragm is a polytetrafluoroethylene (PTFE) film, and only one layer of PTFE film is needed.

[0034] Since the positioning cylinder assembly 1 is composed of four arc-shaped plates, the cylindricity of the positioning cylinder assembly composed of arc-shaped plates needs to be designed. In this embodiment, the cylindricity tolerance of the positioning cylinder assembly 1 is designed to be 0.1mm to ensure that the positioning cylinder assembly 1 has good cylindricity, is not prone to contact friction with the tooling interior and damage the product, and improves the paint impregnation effect of the product.

[0035] Example 3: This example describes the usage of the tooling and implements it using a paint impregnation tooling for an electromagnetic pump from Example 2. The usage method of the paint impregnation tooling for an electromagnetic pump from Example 1 is the same as that of this example.

[0036] Specifically, the product includes a stator core 8 and a winding coil 7. The stator core 8 has a six-piece structure, and winding slots are provided on the inner side of the stator core 8. The winding coil 7 is wound in the winding slots. After the winding coil 7 is arranged in the winding slots, in order to improve the heat dissipation effect of the winding coil 7, the upper and lower sides of the winding coil 7 ( Figure 1 The upper and lower positions shown should be in close contact with the upper and lower walls of the winding slot to eliminate the gap between the winding coil 7 and the stator core 8. This also increases the heat dissipation effect of the winding coil 7 (increasing the contact area between the winding coil 7 and the stator core 8, heat is conducted into the stator core 8, and heat dissipation is accelerated through the stator core 8). Furthermore, it can prevent the mechanical vibration generated by the stator core 8 from wearing off the insulating varnish on the surface of the winding coil 7.

[0037] The assembled product is placed on the cylinder of the positioning cylinder assembly 1, and the limiting step 3 is located on the lower side to support the product. The product is also provided with connecting plates at the upper and lower ends, which are part of the product structure. The lower connecting plate can connect with the limiting step 3 on the positioning cylinder assembly 1 to fix the product. The radial dimension of the top of the positioning cylinder assembly 1 is smaller than the inner diameter of the product, which makes it easier for the product to be placed into the positioning cylinder assembly 1.

[0038] After the product is placed in the positioning cylinder assembly 1, the tooling is lifted by the lifting connection part 6 on the second sealing plate 22 through the lifting equipment and placed into the paint tank for immersion in paint. After immersion in paint, the tooling is lifted out of the paint tank and left to stand for a period of time to drain the excess paint from the product. The paint in the inner cavity of the positioning cylinder assembly 1 can be discharged through the drain hole 4 on the first sealing plate 21.

[0039] After excess paint is drained from the product, the connectors between the first sealing plate 21, the second sealing plate 22, and the positioning cylinder assembly 1 are removed. The connectors between the limiting step 3 and the product are also removed. Finally, by gently tapping the arc-shaped plates, each arc-shaped plate is removed from the product, resulting in a product formed by impregnating the stator core 8 and the winding coil 7 together. The electromagnetic pump coil and stator processed by this method can reduce or eliminate the gap between the stator and the coil (the gap is minimized as much as possible before impregnation), thereby improving the heat dissipation effect of the coil and extending its service life.

Claims

1. A paint impregnation fixture for an electromagnetic pump, characterized in that, The device includes a positioning cylinder assembly and a sealing plate assembly. The positioning cylinder assembly is a cylindrical shape composed of at least two sets of arc-shaped plates. The sealing plate assembly includes a first sealing plate and a second sealing plate, which are respectively disposed at both ends of the positioning cylinder assembly and connect the arc-shaped plates.

2. The impregnation fixture for an electromagnetic pump according to claim 1, characterized in that, The positioning cylinder assembly has a radially outwardly arranged limiting step on the side near the first sealing plate. The limiting step has a first connecting hole, and the first sealing plate and the limiting step are fixedly connected to the first connecting hole.

3. The impregnation fixture for an electromagnetic pump according to claim 1, characterized in that, The first sealing plate is provided with a drain hole that connects to the internal cavity of the positioning cylinder assembly.

4. The impregnation fixture for an electromagnetic pump according to claim 1, characterized in that, The positioning cylinder assembly has a radially inwardly arranged connecting part on the side near the second sealing plate, and the connecting part has a second connecting hole. The second sealing plate and the connecting part are fixedly connected to the second connecting hole.

5. A paint impregnation fixture for an electromagnetic pump according to any one of claims 1 to 4, characterized in that, The arc-shaped plates are in four groups, and the connecting surfaces between the arc-shaped plates are inclined surfaces.

6. The impregnation fixture for an electromagnetic pump according to claim 1 or 4, characterized in that, The second sealing plate is equipped with a lifting connection part.

7. A paint impregnation fixture for an electromagnetic pump according to any one of claims 1 to 4, characterized in that, The positioning cylinder assembly is provided with a diaphragm on its exterior.

8. A coating fixture for an electromagnetic pump according to any one of claims 1 to 4, characterized in that, The positioning cylinder assembly is a cylindrical cylinder, and the cylindricity tolerance of the positioning cylinder assembly is 0.1 mm.

9. The impregnation fixture for an electromagnetic pump according to claim 6, characterized in that, The lifting connection part has a through hole structure.

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