High-pressure air inlet structure of silicon nitride pressure sintering furnace

Abstract

The utility model provides a high-pressure air inlet structure of a silicon nitride pressure sintering furnace, which belongs to the technical field of industrial kilns and comprises a high-pressure air inlet pipe, a pressure regulator and a connecting box, one end of the high-pressure air inlet pipe is fixedly connected to the input end of the connecting box, and the output end of the connecting box is fixedly connected with a mounting pipe. The other end of the high-pressure air inlet pipe is fixedly connected with a first flange plate, the output end of the pressure regulator is fixedly connected with a second flange plate, the first flange plate is fixedly connected with the second flange plate, and a plurality of hexagon bolts are rotationally connected to the joint of the first flange plate and the second flange plate in a penetrating mode. By arranging the detachable filtering device, input high-pressure gas can be filtered, impurities are prevented from entering the furnace to affect the sintering process and the product quality, and the filtering device can be detached through threaded connection, so that the filtering device is convenient to clean and replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial kilns, and in particular relates to a high-pressure air intake structure of a silicon nitride pressure sintering furnace. Background Art

[0002] Silicon nitride pressure sintering furnace is a kind of equipment used to sinter silicon nitride materials, also known as isostatic pressing sintering technology or low-pressure sintering, overpressure sintering. This process combines dewaxing, pre-burning, vacuum sintering and hot isostatic pressing into one process in one device, and is evolved from hot isostatic pressing technology.

[0003] During operation, the silicon nitride pressure sintering furnace needs to transport high-pressure gas into the sintering furnace through a high-pressure air inlet pipe to produce a chemical reaction. However, impurities usually enter during the transmission of high-pressure gas, which will affect the sintering process and product quality. Therefore, this equipment needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to solve the problems raised in the above background technology and to propose a high-pressure air intake structure for a silicon nitride pressure sintering furnace.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A high-pressure air intake structure for a silicon nitride pressure sintering furnace includes a high-pressure air intake pipe, a pressure regulator and a connecting box, one end of the high-pressure air intake pipe is fixedly connected to the input end of the connecting box, the output end of the connecting box is fixedly connected to a mounting pipe, the other end of the high-pressure air intake pipe is fixedly connected to a first flange, the output end of the pressure regulator is fixedly connected to a second flange, the first flange and the second flange are fixedly connected, a plurality of hexagonal bolts are rotatably connected through the connection between the first flange and the second flange, a plurality of hexagonal bolts are threadedly connected to hexagonal nuts, and four threaded holes are provided on the upper surface of the connecting box.

[0007] Preferably, a slide groove is provided on the upper surface of the connection box, an air filter plate is slidably connected in the slide groove, and a mounting plate is fixedly connected to the upper surface of the air filter plate.

[0008] Preferably, hexagonal studs are rotatably connected through the four corners of the upper surface of the mounting plate, and the four hexagonal studs are threadedly connected to four threaded holes opened on the upper surface of the connection box.

[0009] Preferably, a sealing groove is provided on the upper surface of the connection box, and a sealing ring is slidably connected in the sealing groove.

[0010] Preferably, the annular outer surface of the sealing ring contacts the lower surface of the mounting plate.

[0011] Preferably, the connection box connects the high-pressure air inlet pipe and the installation pipe.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The utility model provides a detachable filter device, which can filter the input high-pressure gas to prevent impurities from entering the furnace, thereby affecting the sintering process and product quality. The filter device can be removed through a threaded connection, which is convenient for cleaning and replacement of the filter device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a high-pressure air intake structure of a silicon nitride pressure sintering furnace proposed in the present invention;

[0015] Figure 2 This is a schematic diagram of the main structure of a high-pressure air intake structure of a silicon nitride pressure sintering furnace proposed in the present invention;

[0016] Figure 3 This is a schematic structural diagram of a filtering device for a high-pressure air intake structure of a silicon nitride pressure sintering furnace proposed in the present invention.

[0017] In the figure: 1 high-pressure intake pipe, 2 connection box, 3 mounting pipe, 4 first flange, 5 second flange, 6 pressure regulator, 7 hexagonal bolt, 8 hexagonal nut, 9 slide groove, 10 threaded hole, 11 sealing groove, 12 sealing ring, 13 air filter plate, 14 mounting plate, 15 hexagonal stud. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0019] Reference Figure 1-Figure 3 The vent pipe 3 of the vent pipe 3 is fixedly connected to the vent pipe 3 of the vent pipe 3, and the vent pipe 3 of the vent pipe 3 is fixedly connected to the vent pipe 3 of the vent pipe 3.

[0020] The upper surface of the connection box 2 is provided with four threaded holes 10, and the four corners of the upper surface of the mounting plate 14 are rotatably connected with hexagonal studs 15. The four hexagonal studs 15 are threadedly connected to the four threaded holes 10 opened on the upper surface of the connection box 2. A slide groove 9 is provided on the upper surface of the connection box 2, and an air filter plate 13 is slidably connected in the slide groove 9. The filter plate 13 can filter the input gas, and the upper surface of the air filter plate 13 is fixedly connected to the mounting plate 14. A sealing groove 11 is provided on the upper surface of the connection box 2, and a sealing ring 12 is slidably connected in the sealing groove 11. The sealing ring 12 can seal the pipeline to prevent high-pressure gas from flowing out and causing air pollution. The annular outer surface of the sealing ring 12 is in contact with the lower surface of the mounting plate 14. By providing a detachable filter device, the input high-pressure gas can be filtered to prevent impurities from entering the furnace, thereby affecting the sintering process and product quality. The filter device can be removed by threaded connection, which is convenient for cleaning and replacement of the filter device.

[0021] The functional principle of this utility model can be explained through the following operation modes:

[0022] When it is necessary to input high-pressure gas to the sintering furnace, first connect the input end of the pressure regulator 6 to the air inlet pipe, and then control the gas pressure and flow rate in the pipeline by adjusting the pressure regulator 6. The pressure regulator 6 and the high-pressure air inlet pipe 1 are connected through the first flange 4 and the second flange 5. The pressure regulator 6 and the high-pressure air inlet pipe 1 can be better connected and their sealing can be ensured. The pressure regulator 6 can not only adjust the air pressure of the input gas, but also adjust the gas flow rate. When the gas passes through the connecting box 2, the filter plate 13 can filter the input gas to prevent impurities from entering the furnace. By setting a detachable filter device, the input high-pressure gas can be filtered to prevent impurities from entering the furnace, thereby affecting the sintering process and product quality. The filter device can be removed through a threaded connection, which is convenient for cleaning and replacement of the filter device.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A high-pressure air intake structure for a silicon nitride pressure sintering furnace, comprising a high-pressure air intake pipe (1), a pressure regulator (6) and a connection box (2), characterized in that: One end of the high-pressure intake pipe (1) is fixedly connected to the input end of the connection box (2), the output end of the connection box (2) is fixedly connected to a mounting pipe (3), the other end of the high-pressure intake pipe (1) is fixedly connected to a first flange (4), the output end of the pressure regulator (6) is fixedly connected to a second flange (5), the first flange (4) and the second flange (5) are fixedly connected, a plurality of hexagonal bolts (7) are rotatably connected through the connection between the first flange (4) and the second flange (5), and a plurality of hexagonal nuts (8) are threadedly connected to the plurality of hexagonal bolts (7), and four threaded holes (10) are provided on the upper surface of the connection box (2).

2. The high-pressure air inlet structure of a silicon nitride pressure sintering furnace according to claim 1, characterized in that: A chute (9) is provided on the upper surface of the connection box (2), an air filter plate (13) is slidably connected in the chute (9), and a mounting plate (14) is fixedly connected to the upper surface of the air filter plate (13).

3. The high-pressure air inlet structure of a silicon nitride pressure sintering furnace according to claim 2, characterized in that: Hexagonal studs (15) are rotatably connected through the four corners of the upper surface of the mounting plate (14), and the four hexagonal studs (15) are threadedly connected to four threaded holes (10) opened on the upper surface of the connection box (2).

4. The high-pressure air inlet structure of a silicon nitride pressure sintering furnace according to claim 3, characterized in that: A sealing groove (11) is provided on the upper surface of the connection box (2), and a sealing ring (12) is slidably connected in the sealing groove (11).

5. The high-pressure air inlet structure of a silicon nitride pressure sintering furnace according to claim 4, characterized in that: The annular outer surface of the sealing ring (12) is in contact with the lower surface of the mounting plate (14).

6. The high-pressure air inlet structure of a silicon nitride pressure sintering furnace according to claim 1, characterized in that: The connection box (2) connects the high-pressure air intake pipe (1) and the installation pipe (3).

Images