CN211953674U

CN211953674U - Magnetic ring sintering bell jar kiln

Info

Publication number: CN211953674U
Application number: CN202020526138.6U
Authority: CN
Inventors: 璧垫尝; 赵波
Original assignee: Changde Yufeng Magnetoelectric Technology Co ltd
Current assignee: Changde Yufeng Magnetoelectric Technology Co ltd
Priority date: 2020-04-12
Filing date: 2020-04-12
Publication date: 2020-11-17
Anticipated expiration: 2030-04-12

Abstract

The utility model discloses a magnetic ring sintering bell jar kiln, which comprises a kiln body and a lifting bearing platform, wherein the lifting bearing platform for placing sintering blank bowls is arranged below the kiln body, a plurality of silicon-molybdenum heating rods are uniformly fixed around the inside of the kiln body, the wall of the kiln body is a hollow interlayer wall, and a cooling water tank is designed at the hollow part of the interlayer wall; fireproof high-temperature heat insulation plates are fixed on the periphery and the top of the inner side of the wall of the furnace body; the furnace body is connected with a sintering atmosphere circulating pipe which is of an inner and outer sleeve structure, wherein the inner pipe is a hot air outlet pipe, a gap between the outer pipe and the inner pipe forms an air-cooling inlet pipe, the hot air outlet pipe is finally connected and communicated with a closed heat collecting water tank, the air-cooling inlet pipe is connected with an induced draft fan, and the inlet pipe of the induced draft fan extends into the upper portion of the liquid level in the heat collecting water tank from the top of the heat collecting water tank. The utility model discloses heat utilization rate has effectively been improved.

Description

Magnetic ring sintering bell jar kiln

Technical Field

The utility model relates to a magnetic ring processing technology field, concretely design a magnetic ring sintering bell jar kiln.

Background

The magnetic ring is a ring-shaped magnetizer, is a common anti-interference element in an electronic circuit, has good inhibition effect on high-frequency noise, is generally made of ferrite and is mainly used for manufacturing high-frequency transformers, inductors, noise filters and the like. With the development of the electronic industry, the requirements on the performance of magnetic materials are higher and higher. Therefore, improving and enhancing the performance of the magnetic ring to meet the market demand is a major concern for research and development personnel.

The main processing flow of the magnetic ring is as follows: feeding → mixing → molding → sintering → grinding → spray drying, etc., wherein sintering is one of the most critical factors affecting the quality of the magnetic ring. Sintering is usually carried out in a bell jar kiln, a blank loading person loads a blank into a blank bowl according to requirements before opening the kiln, then the blank bowl is loaded on a kiln car, sintering is carried out according to the operation specification of the bell jar kiln, and the temperature rise speed, the sintering temperature and the sintering atmosphere are controlled, wherein the sintering atmosphere is generally nitrogen; and after sintering, opening the furnace after the kiln temperature is cooled to normal temperature, and unloading the product. In the bell jar kiln for sintering the magnetic ring in the prior art, the product is heated unevenly, the heat utilization rate is poor, and the circulating sintering atmosphere can not be formed.

SUMMERY OF THE UTILITY MODEL

To the deficiencies of the prior art, the utility model aims at providing a magnetic ring fritting furnace that structural design is reasonable.

In order to realize the above, the utility model discloses a technical scheme is: a magnetic ring sintering furnace comprises a furnace body and a lifting bearing table, wherein the furnace body is a bell-jar type furnace body with an opening at the bottom, the lifting bearing table used for placing a sintering blank bowl is arranged below the furnace body, and a plurality of silicon-molybdenum heating rods are uniformly fixed on the periphery in the furnace body; fireproof high-temperature heat insulation plates are fixed on the periphery and the top of the inner side of the wall of the furnace body; the furnace body is connected with a sintering atmosphere circulating pipe which is of an inner and outer sleeve structure, wherein the inner pipe is a hot air outlet pipe, a gap between the outer pipe and the inner pipe forms an air-cooling inlet pipe, the hot air outlet pipe is finally connected and communicated with a closed heat collecting water tank, the air-cooling inlet pipe is connected with an induced draft fan, and the inlet pipe of the induced draft fan extends into the upper portion of the liquid level in the heat collecting water tank from the top of the heat collecting water tank.

Preferably, the sintering atmosphere circulating pipes are arranged above and below the furnace body, one end of the upper sintering atmosphere circulating pipe penetrates through the top of the furnace body and then extends into the inner cavity of the furnace body, one end of the lower sintering atmosphere circulating pipe penetrates through the bottom of one side of the furnace body and then extends into the inner cavity of the furnace body, the upper sintering atmosphere circulating pipe is connected with the lower sintering atmosphere circulating pipe through an inner sleeve type tee joint and an outer sleeve type tee joint, a hot gas outlet pipe of the upper sintering atmosphere circulating pipe is communicated with a hot gas outlet pipe of the lower sintering atmosphere circulating pipe, a cold gas inlet pipe of the upper sintering atmosphere circulating pipe is communicated with a cold gas inlet pipe of the lower sintering atmosphere circulating pipe, the other end of the inner sleeve type tee joint and the outer sleeve type tee joint is connected with a collecting pipe, the collecting pipe is composed of an inner hot gas pipe and an outer cold gas pipe, wherein the outer, the penetrating end of the internal hot air pipe is connected to the bottom of one side of the heat collection water tank, the external cold air pipe is upwards connected to an induced draft fan located at the top of the heat collection water tank, and an inlet pipe of the induced draft fan is connected to the top of the heat collection water tank.

Preferably, a plurality of pre-vacuum pipes are connected to the furnace body, one ends of the pre-vacuum pipes extend into the inner cavity of the furnace body from the lower part or/and the top of the wall of the furnace body, and the other ends of the pre-vacuum pipes are converged on the same pipe, and a valve is fixed on the pipe.

Compared with the prior art, the utility model discloses the beneficial effect who possesses is:

1. the pre-vacuum sintering can be realized through the arrangement of a pre-vacuum pipeline and the like;

2. through the arrangement of the sintering atmosphere circulating pipe and the like, the heat exchange between the cold sintering gas entering the furnace body and the hot sintering gas coming out of the furnace body can be realized, the link that the cold sintering gas entering the furnace body needs to be preheated in advance is saved, and the heat energy utilization rate is effectively improved;

3. the wall of the furnace body is designed into a hollow sandwich structure, so that on one hand, the damage of electric equipment caused by overhigh temperature of the sintering furnace can be effectively prevented, on the other hand, the whole sintering furnace body can be cooled, and the cooling effect after sintering is improved;

4. through the setting of lift plummer, can be convenient for go up, the unloading.

Drawings

FIG. 1 is a schematic structural view of the furnace body and the upgrade bearing platform during sintering

FIG. 2 is a schematic structural view of the furnace body and the upgrade loading platform for loading materials before sintering or unloading materials after sintering

FIG. 3 is the sectional view of the utility model with the lifting mechanism of the upgrading plummer removed

FIG. 4 is a schematic structural view of the sintering atmosphere circulating tube of the present invention

Fig. 5 is a schematic view of the lifting structure of the lifting plummer of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The following are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent or similar substitutes should fall within the scope of protection of the present application without departing from the inventive concept. And the details which are not described below should be performed according to the prior art or the conventional techniques in the field.

As shown in figures 1-5, the utility model discloses a magnetic ring fritting furnace, including furnace body 1, lift plummer 2, furnace body 1 is the bell jar formula furnace body of bottom opening, furnace body 1 erects the suitable height above ground through frame 13 (by the frame type frame, connect many horizontal supports between frame type frame and the furnace body and support the frame type frame on the ground vertical support in a welded manner, the furnace body is located in the frame type frame), set up the lift plummer 2 that is used for placing the sintering base alms bowl below the furnace body 1, wherein lift plummer 2 includes platform board 2.1 and the elevating system 2.2 that drives platform board 2.1 to go up and down, elevating system is the hydraulic elevating system among the prior art, evenly fix many silicon molybdenum heating rod 3 through the bolt all around in the furnace body 1, silicon molybdenum heating rod 3 is fixed on the inboard of fire prevention high temperature baffle board 7 specifically, 1 wall is the sandwich wall of cavity form, the hollow part of the interlayer wall 1.1 is designed into a cooling water tank 4, the bottom of the cooling water tank 4 is connected and communicated with a cold water inlet pipe 5 in a conventional manner, the upper part of the cooling water tank 4 is connected and communicated with a hot water outlet pipe 6 in a conventional manner, and in practice, hot water flowing out of the hot water outlet pipe 6 can be sent into the cold water inlet pipe 5 to form water circulation after heat exchange and cooling through a heat exchange water tank in a conventional manner; fireproof high-temperature heat insulation plates 7 are fixed on the periphery and the top of the inner side of the wall of the furnace body 1; the sintering atmosphere circulating pipe 8 is connected and communicated with the furnace body 1 in a conventional mode, the sintering atmosphere circulating pipe 8 is of an inner and outer sleeve structure, namely the sintering atmosphere circulating pipe 8 is formed by an inner pipe and an outer pipe in an inner and outer nesting mode, the inner pipe is a hot air outlet pipe 8.1, a cold air inlet pipe 8.2 is formed in a gap between the outer pipe and the inner pipe, the hot air outlet pipe 8.1 is finally connected and communicated with a closed heat collecting water tank 9, the cold air inlet pipe 8.2 is connected with an induced draft fan 10, the inlet pipe of the induced draft fan 10 extends into the heat collecting water tank 9 from the top of the heat collecting water tank 9 to be above the liquid level in the heat collecting water. Before the furnace body is used (during feeding) or during blanking, the furnace body has certain distance from the lifting bearing platform, and when the furnace body is used, the lifting bearing platform rises to the bottom of the closed furnace body.

Specifically, the sintering atmosphere circulating pipes 8 are arranged above and below the furnace body 1, one end of the upper sintering atmosphere circulating pipe 8 penetrates through the top of the furnace body 1 and then extends into the inner cavity of the furnace body 1, one end of the lower sintering atmosphere circulating pipe 8 penetrates through the bottom of one side of the furnace body 1 and then extends into the inner cavity of the furnace body 1, the upper sintering atmosphere circulating pipe 8 is in threaded connection with the lower sintering atmosphere circulating pipe 8 through an inner sleeve type tee joint and an outer sleeve type tee joint (namely the tee joint is also formed by the inner tee joint and the outer tee joint) or is in flange connection, a hot gas outlet pipe 8.1 of the upper sintering atmosphere circulating pipe 8 is communicated with a hot gas outlet pipe 8.1 of the lower sintering atmosphere circulating pipe 8, a cold gas inlet pipe 8.2 of the upper sintering atmosphere circulating pipe 8 is communicated with a cold gas inlet pipe 8.2 of the lower sintering atmosphere circulating pipe 8, the other end of the inner sleeve, wherein outside cold air duct 11.2 is a return bend in the place of turning, set up the hole that supplies inside hot-blast pipe 11.1 to wear out and have sealed the pad between inside hot-blast pipe 11.1 and the return bend hole on one side of return bend, inside hot-blast pipe 11.1 is worn out and is held and connect in one side bottom of hot water tank 9, outside cold air duct 11.2 upwards connects on the draught fan 10 that is located hot water tank 9 top according to conventional mode, the pipe that advances of draught fan 10 connects at hot water tank 9 top, hot water tank 9 is a confined box, connect and communicate a sintering atmosphere air supplement pipe on one side in hot water tank 9 as required, this sintering atmosphere air supplement pipe accessible pipeline and coupling connection gas bomb.

A plurality of pre-vacuum pipes 12 are connected to the furnace body 1 in a conventional manner, one ends of the pre-vacuum pipes 12 extend into the inner cavity of the furnace body 1 from the lower part or/and the top of the wall of the furnace body 1, the other ends of the pre-vacuum pipes 12 are converged on the same pipe, a valve is fixed on the pipe, and the converged pipe is finally connected and communicated with a vacuum pump in a conventional manner.

The utility model discloses a prevent disappointing or reveal water, all filled up sealed cushion in the junction of pipeline and pipeline to reach the junction of pipeline and furnace body, pipeline and hot water collecting tank's junction. The utility model discloses a concrete mode about "fixed", "connect" adopts conventional modes such as threaded connection, flange joint or bolt fastening or welded fastening.

When the device is used, the furnace body is firstly vacuumized through a vacuumizing pump, a pre-vacuumizing pipeline and the like, then according to the technical requirements of a bell jar kiln, or the temperature is raised, kept, cooled and the like, and in the whole sintering process, the sintering atmosphere in the furnace body is pumped through the induced draft fan 10 to circulate. In the circulating atmosphere, the sintering is more uniform, and the electrical property of the magnetic ring is improved.

Claims

1. A magnetic ring sintering bell jar kiln comprises a kiln body and a lifting bearing table, wherein the kiln body is a bell jar type kiln body with an opening at the bottom, the lifting bearing table used for placing a sintering blank bowl is arranged below the kiln body, and a plurality of silicon-molybdenum heating rods are uniformly fixed on the periphery in the kiln body; fireproof high-temperature heat insulation plates are fixed on the periphery and the top of the inner side of the wall of the furnace body; the furnace body is connected with a sintering atmosphere circulating pipe which is of an inner and outer sleeve structure, wherein the inner pipe is a hot air outlet pipe, a gap between the outer pipe and the inner pipe forms an air-cooling inlet pipe, the hot air outlet pipe is finally connected and communicated with a closed heat collecting water tank, the air-cooling inlet pipe is connected with an induced draft fan, and the inlet pipe of the induced draft fan extends into the upper portion of the liquid level in the heat collecting water tank from the top of the heat collecting water tank.

2. The magnetic ring sintering bell jar kiln as claimed in claim 1, wherein the sintering atmosphere circulating pipes are arranged above and below the kiln body, one end of the upper sintering atmosphere circulating pipe penetrates from the top of the kiln body and then extends into the inner cavity of the kiln body, one end of the lower sintering atmosphere circulating pipe penetrates from the bottom of one side of the kiln body and then extends into the inner cavity of the kiln body, the upper sintering atmosphere circulating pipe is connected with the lower sintering atmosphere circulating pipe through an inner and outer sleeve type tee joint, a hot gas outlet pipe of the upper sintering atmosphere circulating pipe is communicated with a hot gas outlet pipe of the lower sintering atmosphere circulating pipe, a cold gas inlet pipe of the upper sintering atmosphere circulating pipe is communicated with a cold gas inlet pipe of the lower sintering atmosphere circulating pipe, the other end of the inner and outer sleeve type tee joint is connected with a header pipe, the header pipe is composed of an inner hot gas, the hole that supplies inside steam heating pipe to wear out and have the sealed pad between inside steam heating pipe and the return bend hole is seted up to return bend one side, and inside steam heating pipe wears out the end and connects in one side bottom of hot water collecting tank, and outside cold air duct upwards connects on the draught fan that is located hot water collecting tank top, and the pipe connection that advances of draught fan is at hot water collecting tank top.

3. A magnetic ring sintering bell jar kiln as claimed in claim 1 or 2, wherein a plurality of pre-vacuum pipes are connected to the kiln body, one ends of the pre-vacuum pipes extend into the inner cavity of the kiln body from the lower part or/and the top of the wall of the kiln body, the other ends of the pre-vacuum pipes are converged on the same pipe, and a valve is fixed on the pipe.