High-voltage mutual inductor silica powder raw material conveying and drying device

Abstract

The utility model relates to a high-voltage mutual inductor silica powder raw material conveying and drying device which comprises a drying mechanism and a conveying mechanism, the head end of the drying mechanism is provided with a feeding port, the conveying mechanism is arranged at the tail end of the drying mechanism, the drying mechanism comprises a tank body, a stirring paddle and a heating pipe, and the tank body is of a double-layer structure and comprises an inner container and a shell. The heating pipe is arranged between the inner container and the shell, the stirring paddles are spiral stirring paddles, the stirring paddles are hollow, a heating medium is introduced into the stirring paddles, two outlets are formed in a feed opening of the conveying mechanism, the tail ends of the outlets are connected with premixing tanks, and the tank body and the premixing tanks are connected with negative pressure devices. The drying mechanism adopts the heating pipe and the stirring paddle with the heating function for synchronous heating, the stirring paddle is heated and extends into the silica powder, heating is uniform, moisture regain is prevented, the two outlets of the conveying mechanism enable the silica powder, epoxy resin and a curing agent to be premixed respectively, the mixing time is prolonged, free gas is guaranteed to be fully discharged, and the drying efficiency is improved. And bubbles during pouring are avoided.

Description

Technical Field

[0001] This utility model relates to the field of instrument transformer manufacturing technology, specifically to a high-voltage instrument transformer silicon micro powder raw material conveying and drying device. Background Technology

[0002] Silicon powder is a raw material for the production of high-voltage transformers. In the process of producing high-voltage transformers, in order to avoid the reduction of insulation performance due to residual moisture in the silicon powder, it is usually necessary to dry the silicon powder in advance, then mix it with epoxy resin and curing agent, and finally cast it.

[0003] In the prior art, an oven is usually used to dry silicon micro powder. However, this drying device has defects such as uneven heating of silicon micro powder and moisture reabsorption. In the prior art, after the silicon micro powder is dried, epoxy resin, curing agent and silicon micro powder are usually added to a stirring device for mixing. However, because there is free gas in the pores inside the silicon micro powder, the mixing time is short and the free gas is not completely removed, which easily generates bubbles during the casting process. Utility Model Content

[0004] The purpose of this invention is to overcome the technical defects in the prior art, such as uneven heating and easy moisture re-entry during silicon micropowder drying, and the inability to completely remove free gas in silicon micropowder, which affects casting, and to provide a silicon micropowder raw material conveying and drying device for high voltage transformers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-voltage transformer silicon micro powder raw material conveying and drying device, comprising a drying mechanism and a conveying mechanism. The drying mechanism has a feed inlet at its front end, and the conveying mechanism is located at the rear end of the drying mechanism. The drying mechanism includes a tank, a stirring paddle, and a heating tube. The tank has a double-layer structure, comprising an inner liner and an outer shell. The heating tube is located between the inner liner and the outer shell. The stirring paddle is a spiral stirring paddle, and multiple paddles are provided. The bottom of the stirring paddle contacts the inner wall of the inner liner, and the stirring paddles rotate in the same direction. The stirring paddle is hollow inside, and a heating medium is introduced into it. The conveying mechanism has two outlets at its discharge port, and a negative pressure device is connected to the tank.

[0006] Furthermore, each of the outlet ends is connected to a premixing tank.

[0007] Furthermore, both ends of the stirring paddle are equipped with rotary joints, and the other end of the rotary joint is connected to a medium pipe at both ends of the heating tube.

[0008] Furthermore, the inlets of both the heating tube and the stirring paddle are located at the end near the conveying mechanism, and the outlets are located at the end near the feed inlet.

[0009] Furthermore, a geared motor is provided on the outside of the tank, and a gear transmission assembly is provided at the end of the stirring paddle. Multiple stirring paddles are connected through the gear transmission assembly, and the geared motor is connected to the gear transmission assembly.

[0010] Furthermore, the heating tube has a spiral structure and is fitted onto the outside of the inner liner.

[0011] Furthermore, heat insulation cotton is provided between the heating tube and the outer shell.

[0012] Furthermore, the conveying mechanism is a screw conveyor, and its discharge port is equipped with a regulating valve.

[0013] Furthermore, the regulating valve includes a drive motor and a valve plate. The valve plate is rotatably disposed in the discharge port of the conveying mechanism, and the drive motor is fixed outside the discharge port of the conveying mechanism, with its output shaft fixedly connected to the valve plate.

[0014] The beneficial effects of this utility model are as follows: The drying mechanism of this utility model adopts heating tubes and stirring paddles with heating function for synchronous heating. The stirring paddle heating extends into the interior of the silicon micro powder, thereby making the heating uniform. The heating tube heating raises the temperature inside the entire tank, providing a high-temperature environment to prevent moisture return. The conveying mechanism has two outlets, which are connected to two premixing tanks, so that the silicon micro powder, epoxy resin and curing agent are premixed separately and then mixed together. This increases the mixing time, allowing the free gas in the silicon micro powder to be fully discharged, avoiding air bubbles in the pouring. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a high-voltage transformer silicon micro powder raw material conveying and drying device according to the present invention;

[0016] Figure 2 This is a schematic diagram of the longitudinal section structure of the drying mechanism of this utility model;

[0017] Figure 3 This is a partial perspective view of the conveying mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the longitudinal section structure of the transmission gear set of this utility model.

[0019] 1. Drying mechanism; 2. Conveying mechanism; 3. Tank body; 4. Agitator; 5. Heating tube; 6. Inner liner; 7. Outer shell; 8. Outlet; 9. Premixing tank; 10. Feed inlet; 11. Rotary joint; 12. Media pipeline; 13. Gear motor; 14. Gear transmission assembly; 15. Insulation cotton; 16. Regulating valve; 17. Drive motor; 18. Valve plate. Detailed Implementation

[0020] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0021] Embodiments of this utility model: such as Figure 1-4 As shown, a high-voltage transformer silicon micro powder raw material conveying and drying device includes a drying mechanism 1 and a conveying mechanism 2. The drying mechanism 1 has a feed inlet 10 at its first end, and the conveying mechanism 2 is located at the tail end of the drying mechanism 1. The drying mechanism 1 includes a tank body 3, a stirring paddle 4, and a heating tube 5. The tank body 3 has a double-layer structure, including an inner liner 6 and an outer shell 7. The heating tube 5 is located between the inner liner 6 and the outer shell 7. The stirring paddle 4 is a spiral stirring paddle, and multiple of them are provided. The bottom of the stirring paddle 4 contacts the inner wall of the inner liner 6. The stirring paddles 4 rotate in the same direction. The stirring paddle 4 is hollow inside and a heating medium is introduced into it. The feed inlet of the conveying mechanism 2 has two outlets 8. A negative pressure device is connected to the tank body 3.

[0022] Each of the 8 outlets is connected to a premix tank 9.

[0023] like Figure 1 As shown, the stirring paddle 4 is provided with a rotary joint 11 at both ends, and the other end of the rotary joint 11 is connected to a medium pipe 12 at both ends of the heating tube 5.

[0024] It is worth noting that a negative pressure device is also connected to the premix tank 9.

[0025] It is worth noting that the rotary joint 11 is a rotatable pipe joint in the prior art.

[0026] It is worth noting that protrusions can be provided on the side wall of the stirring paddle 4, which makes it easier to throw the silicon micro powder up during its rotation, so that it can fully contact the hot air in the tank and avoid the silicon micro powder from clumping.

[0027] It is worth noting that the negative pressure device is a vacuum pump.

[0028] Through the above structure, steam or other heating media are introduced into the medium pipeline 12. The heating media raises the temperature inside the tank 3 through the heating pipe 5, providing a high-temperature environment for drying. The vacuum device can lower the boiling point of water, improve drying efficiency, and absorb moisture to prevent moisture return. The heating media is fully heated by the stirring paddle 4, ensuring uniform heating. The stirring paddle 4 rotates, throwing the silicon powder up to ensure it is in full contact with the high-temperature hot air inside the tank 3, while simultaneously transporting the silicon powder to the tail end of the tank 3. Once the silicon powder reaches the tail end of the tank 3, it is conveyed out by the conveying mechanism 2. The two premixing tanks 9 contain curing agent and epoxy resin, respectively. The silicon powder is distributed to the two premixing tanks 9 for premixing with the curing agent or epoxy resin inside, and then sent to the mixing device for overall mixing. This extends the mixing time, allowing free gas in the silicon powder to be fully discharged and removed.

[0029] The inlets of the heating tube 5 and the stirring paddle 4 are both located at one end near the conveying mechanism 2, and the outlets are located at one end near the feed inlet 10.

[0030] The above structure allows the temperature inside the tank 3 to be higher at the end closest to the conveying mechanism 2, further preventing the silicon powder from becoming damp.

[0031] like Figure 1 , 4 As shown, a reduction motor 13 is provided on the outside of the tank body 3, and a gear transmission group 14 is provided at the end of the stirring paddle 4. Multiple stirring paddles 4 are connected through the gear transmission group 14, and the reduction motor 13 is connected to the gear transmission group 14, so that multiple stirring paddles 4 can be rotated by one reduction motor 13.

[0032] like Figure 2 As shown, the heating tube 5 has a spiral structure and is fitted onto the outside of the inner liner 6.

[0033] The above structure increases the coverage area of ​​the heating element 5, thus achieving sufficient heat conduction.

[0034] like Figure 2 As shown, heat insulation cotton 15 is provided between the heating tube 5 and the outer shell 7.

[0035] The above structure achieves heat insulation and reduces heat loss.

[0036] The conveying mechanism 2 is a screw conveyor, and its discharge port is equipped with a regulating valve 16.

[0037] like Figure 3 As shown, the regulating valve 16 includes a drive motor 17 and a valve plate 18. The valve plate 18 is rotatably disposed in the discharge port of the conveying mechanism 2. The drive motor 17 is fixed outside the discharge port of the conveying mechanism 2, and its output shaft is fixedly connected to the valve plate 18.

[0038] With the above structure, the drive motor 17 drives the valve plate 18 to rotate, and adjusts the angle of the valve plate 18, thereby controlling the discharge amount of the two outlets.

[0039] In specific implementation, silicon micro powder is fed into the feed inlet 10 through the vacuum negative pressure conveying device in the existing technology. The silicon micro powder enters the tank 3, where the moisture evaporates in the high temperature environment. At the same time, the stirring paddle 4 stirs and heats the powder, increasing the heating surface and making the silicon micro powder heat more evenly. While stirring the silicon micro powder, the stirring paddle 4 gradually transports it to one end of the conveying mechanism 2. Then, it is sent to two premixing tanks 9 through the conveying mechanism 2. The regulating valves 16 of the two outlets 8 can adjust the proportion of silicon micro powder entering the two premixing tanks 9.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0042] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-voltage transformer silicon micro powder raw material conveying and drying device, comprising a drying mechanism (1) and a conveying mechanism (2), wherein the drying mechanism (1) is provided with a feed inlet (10) at its head end, and the conveying mechanism (2) is provided at the tail end of the drying mechanism (1), characterized in that: The drying mechanism (1) includes a tank (3), a stirring paddle (4), and a heating tube (5). The tank (3) has a double-layer structure, including an inner liner (6) and an outer shell (7). The heating tube (5) is located between the inner liner (6) and the outer shell (7). The stirring paddle (4) is a spiral stirring paddle, and multiple stirring paddles are provided. The bottom of the stirring paddle (4) contacts the inner wall of the inner liner (6). The stirring paddles (4) rotate in the same direction. The stirring paddle (4) is hollow inside and a heating medium is introduced inside. The discharge port of the conveying mechanism (2) is provided with two outlets (8). The tank (3) is connected to a negative pressure device.

2. The high-voltage transformer silicon micro powder raw material conveying and drying device according to claim 1, characterized in that: Each outlet (8) is connected to a premix tank (9).

3. The high-voltage transformer silicon micro powder raw material conveying and drying device according to claim 2, characterized in that: The stirring paddle (4) is equipped with a rotary joint (11) at both ends, and the other end of the rotary joint (11) is connected to a medium pipe (12) at both ends of the heating tube (5).

4. The high-voltage transformer silicon micro powder raw material conveying and drying device according to claim 1, characterized in that: The inlets of the heating tube (5) and the stirring paddle (4) are both located at one end near the conveying mechanism (2), and the outlets are located at one end near the feed inlet (10).

5. The high-voltage transformer silicon micro powder raw material conveying and drying device according to claim 1, characterized in that: The tank body (3) is equipped with a speed reduction motor (13) on the outside, and the stirring paddle (4) is equipped with a gear transmission group (14) at the end. Multiple stirring paddles (4) are connected through the gear transmission group (14), and the speed reduction motor (13) is connected to the gear transmission group (14).

6. The high-voltage transformer silicon micro powder raw material conveying and drying device according to claim 5, characterized in that: The heating tube (5) has a spiral structure and is fitted on the outside of the inner liner (6).

7. The high-voltage transformer silicon micro powder raw material conveying and drying device according to claim 1, characterized in that: Insulating cotton (15) is provided between the heating tube (5) and the outer shell (7).

8. A high-voltage transformer silicon micro powder raw material conveying and drying device according to claim 7, characterized in that: The conveying mechanism (2) is a screw conveyor, and its discharge port is equipped with a regulating valve (16).

9. A high-voltage transformer silicon micro powder raw material conveying and drying device according to claim 8, characterized in that: The regulating valve (16) includes a drive motor (17) and a valve plate (18). The valve plate (18) is rotatably disposed in the discharge port of the conveying mechanism (2). The drive motor (17) is fixed outside the discharge port of the conveying mechanism (2), and its output shaft is fixedly connected to the valve plate (18).

Images