CN211424895U

CN211424895U - Drying box

Info

Publication number: CN211424895U
Application number: CN201922385469.2U
Authority: CN
Inventors: 邓凯迪; 刘强华; 姚本军; 吴著刚
Original assignee: Guizhou Zhenhua Electronic Information Industry Technology Research Co ltd
Current assignee: Guizhou Zhenhua Electronic Information Industry Technology Research Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-09-04
Anticipated expiration: 2029-12-26

Abstract

The utility model provides a drying box, which comprises a shell and a supporting saddle arranged at the bottom of the shell; a hot plate support is arranged in the shell, and a plurality of hot plates are connected to the hot plate support; the top of the shell is provided with a hot oil inlet, a hot oil outlet and a vacuum interface, and the vacuum interface is connected with a water circulation vacuum unit. The utility model discloses a hot oil indirect heating mode, it is inhomogeneous to solve the stoving in-process temperature, inefficiency, technological problems such as easy oxygenation.

Description

Drying box

Technical Field

The utility model relates to a stoving case.

Background

The tantalum electrolytic capacitor has the characteristics of small volume, large capacity, wide working temperature range, various structural forms, high reliability and the like, and is widely applied to the fields of industrial control, high-end instruments, military communication, aerospace and the like. The performance of the tantalum electrolytic capacitor is determined by a large part of the main structural material, namely tantalum powder, and the high-quality tantalum electrolytic capacitor has high technical requirements on the tantalum powder, including physical and chemical properties, electrical properties, particle size, impurity content and the like.

In the production of tantalum powder, chemical washing is a necessary process, and the tantalum powder after chemical washing can enter the next working procedure after being dried and dehydrated. At present, tantalum powder is dry in the environment of ordinary pressure, dries under microthermal condition, and drying efficiency is low, and temperature uniformity is poor, easy oxygenation, and the increase of oxygen content can produce very big influence to tantalum powder performance, and too high oxygen content can become the crystal point of anodic oxide film at tantalum piece formation in-process, reduces dielectric parameter, causes the increase of condenser leakage current, and the flash point voltage reduces, and is big to the quality of tantalum electric capacity influence.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a drying box, this drying box can effectively solve the stoving in-process temperature inhomogeneous, inefficiency, technological problems such as easy oxygenation.

The utility model discloses a following technical scheme can realize.

The utility model provides a drying box, which comprises a shell and a supporting saddle arranged at the bottom of the shell; a hot plate support is arranged in the shell, and a plurality of hot plates are connected to the hot plate support; the top of the shell is provided with a hot oil inlet, a hot oil outlet and a vacuum interface, and the vacuum interface is connected with a water circulation vacuum unit.

A plurality of hot plates are evenly distributed.

And a temperature sensor and a vacuum sensor are arranged on the hot plate.

And a heating medium heating controller and a temperature controller are arranged on the hot oil inlet.

The hot oil inlet, the hot oil outlet and the vacuum interface are communicated with the inner wall of the shell.

The beneficial effects of the utility model reside in that: adopts a hot oil indirect heating mode, and solves the technical problems of uneven temperature, low efficiency, easy oxygenation and the like in the drying process.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a front view of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2;

in the figure: 1-shell, 2-support saddle, 3-hot plate support, 4-hot plate, 5-hot oil inlet, 6-hot oil outlet and 7-vacuum interface.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

As shown in fig. 1 to 3, the drying box comprises a shell 1 and a supporting saddle 2 arranged at the bottom of the shell 1; a hot plate support 3 is arranged in the shell 1, and a plurality of hot plates 4 are connected to the hot plate support 3; the top of the shell 1 is provided with a hot oil inlet 5, a hot oil outlet 6 and a vacuum interface 7, and the vacuum interface 7 is connected with a water circulation vacuum unit.

Several hot plates 4 are evenly distributed.

The hot oil inlet 5, the hot oil outlet 6 and the vacuum interface 7 are all communicated with the inner wall of the shell 1.

And a temperature sensor and a vacuum sensor are arranged on the hot plate 4.

And a heating medium heating controller and a temperature controller are arranged on the hot oil inlet 5.

Preferably, the electrical control system is connected to the temperature sensor and the vacuum sensor of 4 by control cables.

Preferably, the heat medium heater and the temperature controller reserve heat for heating the oven.

Preferably, for guaranteeing temperature homogeneity and preventing that hot oil from revealing and polluting the material, the design and the processing of hot plate are especially important, the utility model discloses a hot plate adopts the whole processing of stainless steel, and hot oil runner is even, and structural strength is good, satisfies the vacuum drying demand of condenser level tantalum powder.

Preferably, hot oil with large heat storage capacity is used as a medium for indirect heating and a heat exchange system with a large specific area, a heating and cooling curve can be flexibly adjusted and set according to requirements, the drying temperature can be increased to 150 ℃ from the original 60 ℃, water vapor generated in the drying process can be pumped away by a water ring vacuum unit in time, the drying efficiency is high, the increase of the oxygen content of tantalum powder cannot be caused, and the quality of capacitor-grade tantalum powder is improved.

Furthermore, the utility model discloses a 304 stainless steel makes, can prevent to the furthest that the material from receiving the pollution.

At present, the reason that the drying temperature is not uniform under normal pressure is that the air flow in the drying oven is influenced by the drying pan in the drying oven, and the temperature is not uniform due to non-uniform air flow; the low drying efficiency is caused by low drying temperature, slow liquid volatilization, long drying time and low efficiency, but because of the characteristic that tantalum powder is easy to absorb oxygen, if the drying temperature is increased, the tantalum powder absorbs oxygen rapidly, and the electrical property is deteriorated.

Further, in order to solve the oxygenation problem caused by drying the tantalum powder in the normal pressure, the utility model discloses a put tantalum powder in the vacuum environment and dry, namely adopt the water ring vacuum unit, as the vacuum obtaining device, this vacuum unit can provide the vacuum degree of minimum 10Pa for the drying box, guarantee that the tantalum powder material can not cause oxygenation under the higher stoving temperature condition, because there is almost no oxygen in the vacuum environment, can not cause oxygenation, so can improve the stoving temperature, raise the drying efficiency; secondly, because there is vapor to escape when drying, if adopt ordinary vacuum pump, the emulsification takes place very fast under vapor's effect for vacuum pump oil, and the vacuum pump can appear blocking and damage under the condition that the lubricity degree reduces, so the utility model discloses a what vacuum acquisition adopted is water ring vacuum unit, and vacuum can reach 10Pa, can effectively solve the problem of tantalum powder oxygenation in the drying process.

Further, under the environment of vacuum, because there is not the air convection, can not adopt ordinary heating methods, can only adopt heat-conducting mode to heat, because tantalum powder has the blasting nature, if adopt direct electric heating's mode, will cause local overheat, cause tantalum powder blasting easily, have very big potential safety hazard, all the utility model discloses a be hot oil indirect heating mode, its hot oil heat accumulation ability is strong, and the temperature is even, carries out energy transfer, safe and reliable indirectly.

Claims

1. The utility model provides a stoving case, includes casing (1) and sets up support saddle (2) in casing (1) bottom, its characterized in that: a hot plate support (3) is arranged in the shell (1), and a plurality of hot plates (4) are connected to the hot plate support (3); the top of the shell (1) is provided with a hot oil inlet (5), a hot oil outlet (6) and a vacuum interface (7), and the vacuum interface (7) is connected with a water circulation vacuum unit.

2. A drying box according to claim 1, characterized in that: a plurality of hot plates (4) are evenly distributed.

3. A drying box according to claim 1, characterized in that: the hot oil inlet (5), the hot oil outlet (6) and the vacuum interface (7) are communicated with the inner wall of the shell (1).

4. A drying box according to claim 1, characterized in that: and a temperature sensor and a vacuum sensor are arranged on the hot plate (4).

5. A drying box according to claim 1, characterized in that: and a heat medium heating controller and a temperature controller are arranged on the hot oil inlet (5).