CN111504053B

CN111504053B - High-safety soft magnetic ferrite sintering furnace

Info

Publication number: CN111504053B
Application number: CN202010384170.XA
Authority: CN
Inventors: 郭皓; 黄刚; 李崇华
Original assignee: China Magnetic Electronic Technology Co ltd
Current assignee: China Magnetic Electronic Technology Co ltd
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2020-11-10
Anticipated expiration: 2040-05-09
Also published as: CN111504053A

Abstract

The invention relates to the field of production of soft magnetic ferrite and discloses a high-safety soft magnetic ferrite sintering furnace, which comprises a furnace body and a furnace door arranged on the furnace body, wherein a sintering chamber is arranged in the furnace body, a chamber door is arranged on the sintering chamber, a closed sealing chamber is formed between the furnace body and the sintering chamber, and a workbench positioned between the furnace door and the chamber door is arranged in the sealing chamber; the outside of furnace body is provided with the pressurize jar that is equipped with nitrogen gas, is provided with intake pipe and outlet duct on the pressurize jar, and the intake pipe is linked together with nitrogen gas hydraulic pressure station, and the outlet duct is linked together with the seal chamber to be provided with the one-way discharge valve of intercommunication sintering chamber on the furnace body. The invention has the following advantages and effects: keep apart furnace body and sintering chamber through setting up the vacuum seal chamber to utilize the dual cooperation of room door and furnace gate, guarantee that external air can not get into in the sintering chamber, remain the sintering chamber throughout and be in vacuum state, thereby guarantee the indoor product quality of sintering.

Description

High-safety soft magnetic ferrite sintering furnace

Technical Field

The invention relates to the field of production of soft magnetic ferrite, in particular to a high-safety soft magnetic ferrite sintering furnace.

Background

The sintering furnace is a furnace which enables mutual bonding among solid particles of a green body, crystal grains to grow, gaps and crystal boundaries to gradually decrease at high temperature, enables the total volume to shrink and the density to increase through the transmission of substances, and finally becomes a compact polycrystalline sintering body with a certain microstructure.

Chinese patent CN202420146U discloses a magnetic blank vacuum sintering furnace, which comprises two parallel brackets fixed on the foundation and a furnace body fixed on the brackets, wherein the furnace body is provided with a furnace door hinged at one end of the furnace body in the length direction.

When the sintering furnace is used, the furnace body is sealed by using the furnace door, and the raw material magnetic blank is sintered. However, when the furnace door is not sealed properly, external air enters the furnace body, so that the sintered magnetic blank is oxidized, the product quality is affected, and improvement is needed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a high-safety soft magnetic ferrite sintering furnace which has the effect of ensuring the product quality.

The technical purpose of the invention is realized by the following technical scheme: a high-safety soft magnetic ferrite sintering furnace comprises a furnace body and a furnace door arranged on the furnace body, wherein a sintering chamber is arranged in the furnace body, a chamber door is arranged on the sintering chamber, a closed sealing chamber is formed between the furnace body and the sintering chamber, and a workbench positioned between the furnace door and the chamber door is arranged in the sealing chamber; the outside of furnace body is provided with the pressurize jar that is equipped with nitrogen gas, be provided with intake pipe and outlet duct on the pressurize jar, the intake pipe is linked together with nitrogen gas hydraulic pressure station, and the outlet duct is linked together with the seal chamber, and be provided with the intercommunication on the furnace body the one-way discharge valve of sintering chamber.

By adopting the technical scheme, when the sintering furnace is used, the furnace door and the chamber door are opened firstly, then the raw materials to be sintered are placed in the furnace body, and then the chamber door is closed firstly and then the furnace door is closed. Then nitrogen is introduced into the sealed chamber by using the pressure maintaining tank, so that air in the sealed chamber is exhausted along the one-way exhaust valve, and the replacement of air in the sealed chamber is realized. When taking out the finished product, firstly opening the door, then pushing the finished product to the workbench, then closing the door, and cooling the finished product in the sealed chamber. And opening the furnace door until the finished product is cooled, and taking out the finished product. In addition, in the taking-out process of the finished product, outside air cannot enter the sintering chamber, so that the quality of the product in the sintering chamber is ensured. Therefore, the furnace body and the sintering chamber are isolated by the vacuum sealing chamber, and the vacuum of the sintering furnace is ensured by the double matching of the chamber door and the furnace door. And when the sealing of the chamber door is in problem, the outside air can not enter the sintering chamber due to the existence of the sealing chamber, and the sintering chamber is always kept in a vacuum state, so that the product quality in the sintering chamber is ensured.

The present invention in a preferred example may be further configured to: an elastic rod is vertically arranged on the top wall of the sealed chamber, the elastic rod is positioned between the oven door and the chamber door, and the lower end of the elastic rod is provided with a counterweight ball; a first emitter is arranged on the inner wall of one end of the sealing chamber, a first receiver used for receiving a signal sent by the first emitter is arranged at the other end of the sealing chamber, and a first controller used for receiving the signal of the first receiver and controlling the opening and closing of the air inlet pipe is arranged on the pressure maintaining tank; wherein the first transmitter, the counterweight ball and the first receiver are in the same line, and the counterweight ball is used for shielding the signal transmitted by the first transmitter.

Through adopting above-mentioned technical scheme, when being in vacuum state in the sealed chamber, the counter weight ball is in quiescent condition to shelter from first launcher and second receiver, the pressurize jar is in the stop work state this moment. When the leakproofness of room door goes wrong, the steam in the sintering chamber gushes out to the drive counter weight ball rocks, and the counter weight ball is not lieing in between first transmitter and the second receiver this moment, and the second receiver received the signal and with signal transmission to first controller department this moment, and first controller control pressurize jar is opened afterwards, and continuously supplements nitrogen gas to the sealing chamber in, guarantees the vacuum state of sintering chamber, guarantees the normal work of sintering chamber simultaneously. Consequently open and close through the state control pressurize jar that utilizes the counter weight ball, appear revealing when the phenomenon when the room door, carry out nitrogen gas replenishment in the sealed chamber rapidly, guarantee that the sintering chamber is in vacuum state, guarantee the normal work of sintering chamber simultaneously.

The present invention in a preferred example may be further configured to: the furnace body is characterized in that a through hole penetrates through the elastic rod, a sliding hole communicated with the through hole is formed in the upper end face of the furnace body, a sliding rod is vertically and slidably connected between the sliding hole and the through hole, and a locking mechanism used for fixing the sliding rod is arranged on the furnace body.

Through adopting above-mentioned technical scheme, when the nitrogen that fills in the sealed chamber finishes, owing to there is the flow of air, the counter weight ball will be in always and rock the state to control the pressurize jar and open always. At the moment, the locking mechanism is released, then the sliding rod is driven to move downwards, the driving rod is utilized to abut against the counterweight ball, the rapid ball stopping and limiting of the counterweight ball are realized, the counterweight ball is positioned between the first emitter and the second receiver, and the timely closing control of the pressure maintaining tank is realized. Then the sliding rod is slowly pulled to move upwards, and the locking mechanism is utilized to fix the sliding rod, so that the normal work of the sintering furnace can be realized. Consequently, realize the quick ball that stops of counter weight ball and injecteing through setting up the slide bar to realize the timely close control of pressurize jar, avoid causing the waste of nitrogen gas, reached resources are saved's effect.

The present invention in a preferred example may be further configured to: the locking mechanism comprises a spring sleeved on the outer wall of the sliding rod and a handle arranged at the upper end of the sliding rod, and the spring is positioned between the handle and the upper end face of the furnace body.

Through adopting above-mentioned technical scheme, when needs carry out the shut down to the counter weight ball, press the handle and drive the slide bar downstream, the handle is pressed the spring compression this moment. After the counterweight ball stops, loosen the handle, the spring is flicked and drives the sliding rod to move upwards automatically, and then the resilience force of the spring is utilized to fix the handle, so that the automatic locking and fixing and the quick fixing of the sliding rod are realized, and the quick ball stopping of the counterweight ball is limited.

The present invention in a preferred example may be further configured to: the diameter of the sliding hole is smaller than that of the through hole.

Through adopting above-mentioned technical scheme, because the diameter of sliding hole is less than the diameter of through-hole, consequently make the slide bar upwards move the in-process and can not touch the elastic rod to realize quick spacing and stable spacing of counter weight ball and elastic rod.

The present invention in a preferred example may be further configured to: a cooling pipe aligned with the upper end face of the workbench is arranged in the sealing chamber, a refrigeration box communicated with the cooling pipe is arranged outside the furnace body, and a conveying pipe communicated with the refrigeration box is arranged on the pressure maintaining tank; the one end inner wall of seal chamber is provided with the second transmitter, and the other end is provided with and is used for receiving the second receiver of the signal that the second transmitter sent, the room door is used for sheltering from the signal that the second transmitter sent, be provided with on the pressurize jar and be used for receiving the signal of second receiver, and control the second controller that the conveyer pipe opened and close.

Through adopting above-mentioned technical scheme, when the room door was closed, the signal transmission of second transmitter was to on the second receiver to with signal feedback to second controller, can utilize the second controller control conveyer pipe to be in the closed condition this moment. After the finished product sintering finishes, the room door is opened and is sheltered from the second transmitter, and the second controller does not receive the signal this moment, and the second controller no longer works this moment, consequently makes the conveyer pipe be in the open mode to discharge nitrogen gas to the refrigeration incasement, through the quick refrigeration back of refrigeration case this moment, blow refrigerated nitrogen gas to the finished product along the cooling tube on, realize off-the-shelf quick cooling. Therefore, the cooling pipe is controlled to be automatically opened and closed by utilizing the opening and closing of the chamber door, and the rapid cooling and the high-automation cooling of finished products are realized.

The present invention in a preferred example may be further configured to: a snakelike cooling flow channel is arranged in the workbench, and a water inlet pipe and a water outlet pipe which are communicated with the cooling flow channel are arranged on the furnace body.

Through adopting above-mentioned technical scheme, when needs cool off the finished product, let in the cooling channel with the coolant liquid in, realize off-the-shelf quick cooling, improve the cooling efficiency and the machining efficiency of product.

In conclusion, the invention has the following beneficial effects:

1. the furnace body and the sintering chamber are isolated by arranging the vacuum sealing chamber, and the double matching of the chamber door and the furnace door is utilized to ensure that outside air cannot enter the sintering chamber and the sintering chamber is always kept in a vacuum state, so that the product quality in the sintering chamber is ensured;

2. by controlling the pressure maintaining tank to be opened and closed by utilizing the state of the counterweight balls, when the door of the chamber is leaked, nitrogen is rapidly supplemented into the sealed chamber, the sintering chamber is ensured to be in a vacuum state, and the normal work of the sintering chamber is ensured;

3. the sliding rod is arranged to realize the rapid ball stopping and limiting of the counterweight ball, so that the timely closing control of the pressure maintaining tank is realized, the waste of nitrogen is avoided, and the effect of saving resources is achieved;

4. through utilizing opening and close of room door, control cooling tube automatic opening and close realizes off-the-shelf quick cooling and high automatic cooling.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment;

fig. 2 is a schematic view of the internal structure of the embodiment.

Reference numerals: 1. a furnace body; 11. a furnace door; 12. a one-way exhaust valve; 13. a slide hole; 14. a slide bar; 15. a refrigeration case; 2. a sintering chamber; 21. a chamber door; 3. a sealed chamber; 31. an elastic rod; 32. a counterweight ball; 33. a through hole; 34. a first transmitter; 35. a first receiver; 36. a cooling tube; 37. a second transmitter; 38. a second receiver; 4. a work table; 41. a cooling flow channel; 42. a water inlet pipe; 43. a water outlet pipe; 5. a pressure maintaining tank; 51. an air inlet pipe; 52. an air outlet pipe; 53. a first controller; 54. a delivery pipe; 55. a second controller; 6. a locking mechanism; 61. a spring; 62. a handle.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the high-safety soft magnetic ferrite sintering furnace comprises a furnace body 1 and a furnace door 11 arranged on the furnace body 1. A sintering chamber 2 is arranged in the furnace body 1, and a chamber door 21 is arranged on the sintering chamber 2.

As shown in fig. 1 and 2, a sealed chamber 3 is formed between the furnace body 1 and the sintering chamber 2, and a table 4 is provided in the sealed chamber 3 between the furnace door 11 and the chamber door 21.

As shown in fig. 1 and 2, a serpentine cooling flow passage 41 is provided in the table 4, and a water inlet pipe 42 and a water outlet pipe 43 communicating with the cooling flow passage 41 are provided on the furnace body 1.

As shown in fig. 1 and 2, a pressure holding tank 5 filled with nitrogen is provided outside the furnace body 1, and an inlet pipe 51 and an outlet pipe 52 are provided on the pressure holding tank 5. The air inlet pipe 51 is communicated with the nitrogen hydraulic station, the air outlet pipe 52 is communicated with the sealing chamber 3, and the furnace body 1 is provided with a one-way exhaust valve 12 communicated with the sintering chamber 2.

When the above sintering furnace is used, the furnace door 11 and the door 21 are opened first, then the raw material to be sintered is placed in the furnace body 1, and then the door 21 is closed first, and then the furnace door 11 is closed. Then, nitrogen gas is introduced into the sealed chamber 3 by the pressure holding tank 5, and the air in the sealed chamber 3 is discharged along the one-way exhaust valve 12, thereby achieving replacement of the air in the sealed chamber 3.

When taking out the finished product, first open door 21, then with the propelling movement of finished product to workstation 4 on, door 21 closes afterwards, lets in the coolant liquid into inlet tube 42 this moment to make coolant liquid flow through cooling channel 41 after, get rid of along outlet pipe 43 again, can utilize the coolant liquid to realize the quick cooling of workstation 4 and finished product this moment.

And when the finished product is cooled, the whole furnace body 1 is always in a vacuum state. And opening the furnace door 11 until the finished product is cooled, and taking out the finished product. In addition, in the process of taking out the finished product, outside air cannot enter the sintering chamber 2, so that the quality of the product in the sintering chamber 2 is ensured.

In the present embodiment, the furnace body 1 and the sintering chamber 2 are isolated by providing the vacuum sealing chamber 3, and the vacuum of the sintering furnace is ensured by the double cooperation of the chamber door 21 and the furnace door 11. Even when the sealing of the chamber door 21 is in trouble, the outside air does not enter the sintering chamber 2 due to the existence of the sealing chamber 3, and the sintering chamber 2 is always kept in a vacuum state, thereby ensuring the quality of products in the sintering chamber 2.

As shown in fig. 1 and 2, the top wall of the sealing chamber 3 is vertically provided with an elastic rod 31, the elastic rod 31 is located between the oven door 11 and the chamber door 21, and the lower end of the elastic rod 31 is provided with a counterweight ball 32.

As shown in fig. 1 and 2, the elastic rod 31 is provided with a through hole 33, the upper end surface of the furnace body 1 is provided with a slide hole 13 communicating with the through hole 33, and the diameter of the slide hole 13 is smaller than that of the through hole 33.

As shown in fig. 1 and 2, a slide rod 14 is vertically slidably connected between the slide hole 13 and the through hole 33, and a locking mechanism 6 for fixing the slide rod 14 is provided on the furnace body 1.

As shown in fig. 1 and 2, the locking mechanism 6 includes a spring 61 sleeved on the outer wall of the sliding rod 14 and a handle 62 arranged on the upper end of the sliding rod 14, and the spring 61 is located between the handle 62 and the upper end surface of the furnace body 1.

As shown in fig. 1 and 2, the inner wall of one end of the sealed chamber 3 is provided with a first emitter 34, and the other end is provided with a first receiver 35 for receiving a signal emitted from the first emitter 34. The pressure maintaining tank 5 is provided with a first controller 53 for receiving the signal of the first receiver 35 and controlling the opening and closing of the air inlet pipe 51.

As shown in fig. 1 and 2, the first emitter 34, the counterweight ball 32 and the first receiver 35 are located on the same straight line, and the counterweight ball 32 is used for shielding the signal emitted by the first emitter 34.

When nitrogen is filled into the sealing chamber 3, the handle 62 is pressed to drive the sliding rod 14 to move downwards, the handle 62 presses the spring 61 to compress, when the sliding rod 14 impacts the counterweight ball 32, the handle 62 is quickly released, and the spring 61 drives the sliding rod 14 to quickly reset and drives the counterweight ball 32 to be in a shaking state.

At the same time, the weight ball 32 is no longer located between the first emitter 34 and the second receiver 38, and the second receiver 38 receives the signal and transmits the signal to the first controller 53, and then the first controller 53 controls the pressure maintaining tank 5 to be opened, and the nitrogen gas is continuously supplemented into the sealing chamber 3, so that the replacement of the air in the sealing chamber 3 is realized.

When the air in the sealed chamber 3 replaces the outer wall, the handle 62 is pressed to drive the sliding rod 14 to move downwards, at this time, the handle 62 presses the spring 61 to compress, when the sliding rod 14 abuts against the weight ball 32, the weight ball 32 can be used for shielding the first emitter 34 and the second receiver 38, and at this time, the pressure maintaining tank 5 is in a stop working state. When the handle 62 is released slowly until the counterweight ball 32 is stabilized, the spring 61 drives the sliding rod 14 to reset slowly, and the counterweight ball 32 and the elastic rod 31 are stopped and limited.

When the leakproofness of chamber door 21 goes wrong, the hot gas in the sintering chamber 2 gushes out to drive counterweight ball 32 and rock, counterweight ball 32 no longer is located between first transmitter 34 and second receiver 38 this moment, and first controller 53 receives the signal afterwards, and control pressurize jar 5 and open, can continuously supply nitrogen gas to in the sealing chamber 3, realizes the replacement of the interior air of sealing chamber 3 and guarantees the normal work of sintering chamber 2 simultaneously.

As shown in fig. 1 and 2, a cooling pipe 36 aligned with the upper end surface of the table 4 is provided in the sealed chamber 3, a refrigeration box 15 communicating with the cooling pipe 36 is provided outside the furnace body 1, and a delivery pipe 54 communicating with the refrigeration box 15 is provided in the pressure holding tank 5.

As shown in fig. 1 and 2, the inner wall of one end of the sealed chamber 3 is provided with a second transmitter 37, and the other end is provided with a second receiver 38 for receiving a signal emitted by the second transmitter 37, and the chamber door 21 is used for shielding the signal emitted by the second transmitter 37. The pressure maintaining tank 5 is provided with a second controller 55 for receiving the signal of the second receiver 38 and controlling the opening and closing of the delivery pipe 54.

When the door 21 is closed, the door 21 is separated from the position between the second transmitter 37 and the second receiver 38, the signal of the second transmitter 37 is transmitted to the second receiver 38, and the signal is fed back to the second controller 55, and the second controller 55 is used to control the conveying pipe 54 to be in the closed state.

After the finished product sintering finishes, door 21 is opened and is sheltered from second transmitter 37, and second controller 55 does not receive the signal this moment, and second controller 55 no longer works this moment, consequently makes conveyer pipe 54 be in the open mode to discharge nitrogen gas to in the refrigeration case 15, through the quick refrigeration back of refrigeration case 15 this moment, blow refrigerated nitrogen gas to the finished product along cooling tube 36 on, realize off-the-shelf high-efficient cooling.

Claims

1. The utility model provides a soft magnetic ferrite fritting furnace of high security, includes furnace body (1) and sets up furnace gate (11) on furnace body (1), its characterized in that: a sintering chamber (2) is arranged in the furnace body (1), a chamber door (21) is arranged on the sintering chamber (2), a closed sealing chamber (3) is formed between the furnace body (1) and the sintering chamber (2), and a workbench (4) positioned between the furnace door (11) and the chamber door (21) is arranged in the sealing chamber (3); a pressure maintaining tank (5) filled with nitrogen is arranged outside the furnace body (1), an air inlet pipe (51) and an air outlet pipe (52) are arranged on the pressure maintaining tank (5), the air inlet pipe (51) is communicated with the nitrogen hydraulic station, the air outlet pipe (52) is communicated with the sealing chamber (3), and a one-way exhaust valve (12) communicated with the sintering chamber (2) is arranged on the furnace body (1); an elastic rod (31) is vertically arranged on the top wall of the sealing chamber (3), the elastic rod (31) is positioned between the oven door (11) and the oven door (21), and the lower end of the elastic rod (31) is provided with a counterweight ball (32); a first emitter (34) is arranged on the inner wall of one end of the sealing chamber (3), a first receiver (35) used for receiving a signal emitted by the first emitter (34) is arranged on the other end of the sealing chamber, and a first controller (53) used for receiving the signal of the first receiver (35) and controlling the opening and closing of the air inlet pipe (51) is arranged on the pressure maintaining tank (5); wherein the first transmitter (34), the weight ball (32) and the first receiver (35) are in the same line, and the weight ball (32) is used for shielding the signal emitted by the first transmitter (34).

2. A high safety soft magnetic ferrite sintering furnace according to claim 1, characterized in that: the furnace body is characterized in that a through hole (33) penetrates through the elastic rod (31), a sliding hole (13) communicated with the through hole (33) is formed in the upper end face of the furnace body (1), a sliding rod (14) is vertically and slidably connected between the sliding hole (13) and the through hole (33), and a locking mechanism (6) used for fixing the sliding rod (14) is arranged on the furnace body (1).

3. A high safety soft magnetic ferrite sintering furnace according to claim 2, characterized in that: the locking mechanism (6) comprises a spring (61) sleeved on the outer wall of the sliding rod (14) and a handle (62) arranged at the upper end of the sliding rod (14), and the spring (61) is positioned between the handle (62) and the upper end face of the furnace body (1).

4. A high safety soft magnetic ferrite sintering furnace according to claim 3, characterized in that: the diameter of the sliding hole (13) is smaller than that of the through hole (33).

5. A high safety soft magnetic ferrite sintering furnace according to claim 1, characterized in that: a cooling pipe (36) aligned with the upper end face of the workbench (4) is arranged in the sealing chamber (3), a refrigeration box (15) communicated with the cooling pipe (36) is arranged outside the furnace body (1), and a conveying pipe (54) communicated with the refrigeration box (15) is arranged on the pressure maintaining tank (5); the one end inner wall of seal chamber (3) is provided with second transmitter (37), and the other end is provided with and is used for receiving second receiver (38) of the signal that second transmitter (37) sent, room door (21) are used for sheltering from the signal that second transmitter (37) sent, be provided with on pressurize jar (5) and be used for receiving the signal of second receiver (38), and control second controller (55) that conveyer pipe (54) opened and close.

6. A high safety soft magnetic ferrite sintering furnace according to claim 5, characterized in that: a snake-shaped cooling flow channel (41) is arranged in the workbench (4), and a water inlet pipe (42) and a water outlet pipe (43) which are communicated with the cooling flow channel (41) are arranged on the furnace body (1).