Novel atmosphere sintering pit furnace

Abstract

The utility model relates to the technical field of pit furnaces, and discloses a novel atmosphere sintering pit furnace, which comprises a furnace body, a furnace cover and a sealing ring, the furnace cover is hollow, an air outlet pipe is communicated with the furnace cover, the air outlet pipe extends to the lower part of the furnace cover, an air inlet pipe is communicated with the furnace cover, and the air inlet pipe extends to the lower part of the furnace cover. The furnace cover is communicated with a gas inlet pipe, the gas inlet pipe extends to the lower part of the furnace cover and extends into the furnace body, the furnace cover is communicated with a water inlet pipe, the furnace cover is communicated with a water outlet pipe, the water inlet pipe and the water outlet pipe both extend into the furnace cover, and the furnace body, the furnace cover and the sealing ring are all provided with matched threaded holes. The furnace body is connected with the furnace cover and the sealing ring through threaded holes and bolts, the furnace cover is communicated with a thermocouple tube, and the thermocouple tube extends to the lower part of the furnace cover and extends into the furnace body.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pit furnace, concretely to a novel atmosphere sintering pit furnace. BACKGROUND

[0002] The pit furnace is a periodical operation furnace, and is suitable for the heat treatment of rod type and long axis type parts. The circulation of hot air flow in the pit furnace can make the temperature distribution in the furnace uniform, which is beneficial to material preparation.

[0003] However, most of the pit furnaces on the market cannot be fully sintered in the atmosphere, and some pit furnaces with atmosphere can make it difficult for the gas to fill the entire cavity due to the gas path design, especially when the hydrogen gas with small density is used, it is difficult to effectively use the gas. In addition, the furnace cover of the pit furnace directly contacts with the hot air flow, and the long-term operation can easily soften the rubber ring and cause gas leakage, which has certain safety hazards. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a novel atmosphere sintering pit furnace, which solves the problem that most of the pit furnaces on the market cannot be fully sintered in the atmosphere, and some pit furnaces with atmosphere can make it difficult for the gas to fill the entire cavity due to the gas path design, especially when the hydrogen gas with small density is used, it is difficult to effectively use the gas. In addition, the furnace cover of the pit furnace directly contacts with the hot air flow, and the long-term operation can easily soften the rubber ring and cause gas leakage, which has certain safety hazards.

[0005] The utility model provides the following technical scheme: a novel atmosphere sintering pit furnace, including furnace body, furnace cover, sealing ring, the inside of furnace cover is hollow, the furnace cover is connected with the gas pipe, the gas pipe extends to the lower of furnace cover, the furnace cover is connected with the air inlet pipe, the air inlet pipe extends to the lower of furnace cover and extends to the inside of furnace body, the furnace cover is connected with the water inlet pipe, the furnace cover is connected with the water outlet pipe, the water inlet pipe and the water outlet pipe all extend to the inside of furnace cover, the furnace body and the furnace cover and the sealing ring all are equipped with the matching thread hole, the furnace body and the furnace cover and the sealing ring are connected through thread hole and bolt, the furnace cover is connected with thermocouple tube, the thermocouple tube extends to the lower of furnace cover and extends to the inside of furnace body.

[0006] Preferred technical scheme one: the gas pipe, the water outlet pipe, the air inlet pipe, the water inlet pipe and the thermocouple tube are all welded between the furnace cover.

[0007] Preferred technical scheme two: the bottom inner wall of furnace body is fixedly welded with high-temperature gasket.

[0008] Preferred technical solution 3: The bottom end of the thermocouple tube is located in the middle of the furnace body, and the bottom end of the air inlet pipe passes through the high-temperature resistant gasket and extends to the bottom of the furnace body.

[0009] Preferred technical solution four: A furnace cover handle is fixedly welded onto the furnace cover.

[0010] Preferred technical solution five: The surface of the high-temperature resistant gasket is provided with multiple through holes, and the air inlet pipe is movably inserted into the inside of the through holes without interfering with the high-temperature resistant gasket.

[0011] Compared with the prior art, this utility model provides a novel atmosphere sintering pit furnace, which has the following beneficial effects:

[0012] (1) This novel atmosphere sintering pit furnace is equipped with a water circulation cooling system, a full ventilation system, and a temperature measurement system. The cooling system can reduce the furnace cover temperature during operation, thereby reducing wear and tear on the rubber rings and furnace cover, and improving operational safety. The full ventilation system allows the pit furnace to be used for products that require a higher furnace atmosphere during sintering, enabling better sintering of various workpieces.

[0013] (2) In the study of powder metallurgy copper alloy preparation by loose powder sintering, the new atmosphere sintering pit furnace requires hydrogen to be introduced from the bottom and discharged from the top, so as to fill the entire furnace with hydrogen as much as possible, play a role in reduction sintering, and improve the material properties. Attached Figure Description

[0014] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0015] Fig. 2 This is an exploded view of the structure of this utility model;

[0016] Fig. 3 This is a cross-sectional view of the internal structure of the furnace body of this utility model.

[0017] In the diagram: 1. Gas outlet pipe; 2. Furnace lid handle; 3. Water outlet pipe; 4. Thermocouple tube; 5. Gas inlet pipe; 6. Water inlet pipe; 7. Furnace lid; 8. Sealing ring; 9. Furnace body; 10. High-temperature resistant gasket. Detailed Implementation

[0018] Please see Figs. 1-3 ,

[0019] Example 1: A novel atmosphere sintering pit furnace includes a furnace body 9, a furnace cover 7, and a sealing ring 8. The interior of the furnace cover 7 is hollow. An exhaust pipe 1 is connected to the furnace cover 7, extending to the bottom of the furnace cover 7. An intake pipe 5 is connected to the furnace cover 7, extending to the bottom of the furnace cover 7 and into the interior of the furnace body 9. A water inlet pipe 6 and a water outlet pipe 3 are connected to the furnace cover 7, both extending into the interior of the furnace cover 7. Matching threaded holes are provided on the furnace body 9, the furnace cover 7, and the sealing ring 8. The furnace body 9, the furnace cover 7, and the sealing ring 8 are connected by threaded holes and bolts. A thermocouple tube 4 is connected to the furnace cover 7, extending to the bottom of the furnace cover 7 and into the interior of the furnace body 9.

[0020] Example 2: The difference between this example and Example 1 is that the gas outlet pipe 1, water outlet pipe 3, gas inlet pipe 5, water inlet pipe 6, and thermocouple tube 4 are all welded to the furnace cover 7, making the various pipes more securely fixed.

[0021] Example 3: The difference between this example and Example 1 is that a high-temperature resistant gasket 10 is fixedly welded to the bottom inner wall of the furnace body 9 to facilitate the placement of sintered samples or workpieces.

[0022] Example 4: The difference between this example and Example 1 is that the bottom end of the thermocouple tube 4 is located in the middle of the furnace body 9, and the bottom end of the air inlet pipe 5 passes through the high-temperature resistant gasket 10 and extends to the bottom of the furnace body 9 for easy use, so that the atmosphere fills the furnace cavity.

[0023] Example 5: The difference between this example and Example 1 is that a furnace lid handle 2 is fixedly welded onto the furnace lid 7 to facilitate the user in taking the furnace lid 7.

[0024] Example 6: The difference between this example and Example 1 is that the surface of the high-temperature resistant gasket 10 is provided with multiple through holes, and the air inlet pipe 5 is movably inserted into the inside of the through holes without interfering with the high-temperature resistant gasket 10, which facilitates ventilation and makes it easy to install the furnace cover 7 and the air inlet pipe.

[0025] In summary, when using this novel atmosphere sintering pit furnace, the sample is placed on the high-temperature resistant gasket 10, and then the furnace cover 7 and sealing ring 8 are installed to the furnace body 9 using bolts to seal the furnace cavity. Then, before heating, the required atmosphere is introduced for 5-10 minutes to remove residual air from the furnace cavity. Subsequently, the condensation system is turned on, and cold water enters the interior of the furnace cover 7 through the water inlet pipe 6 to cool the furnace cover. At the same time, the heating program is started for sintering.

Claims

1. A novel atmosphere sintering pit furnace, comprising a furnace body (9), a furnace cover (7), and a sealing ring (8), characterized in that: The interior of the furnace cover (7) is hollow. An exhaust pipe (1) is connected to the furnace cover (7), extending to the bottom of the furnace cover (7). An intake pipe (5) is connected to the furnace cover (7), extending to the bottom of the furnace cover (7) and into the interior of the furnace body (9). A water inlet pipe (6) is connected to the furnace cover (7), and a water outlet pipe (3) is connected to the furnace cover (7). Both the water inlet pipe (6) and the water outlet pipe (3) extend to the interior of the furnace body (9). Inside the furnace cover (7), the furnace body (9), the furnace cover (7), and the sealing ring (8) are all provided with matching threaded holes. The furnace body (9), the furnace cover (7), and the sealing ring (8) are connected by threaded holes and bolts. A thermocouple tube (4) is connected to the furnace cover (7). The thermocouple tube (4) extends to the bottom of the furnace cover (7) and extends into the interior of the furnace body (9). A high-temperature resistant gasket (10) is fixedly welded to the bottom inner wall of the furnace body (9).

2. The novel atmosphere sintering pit furnace according to claim 1, characterized in that: The air outlet pipe (1), the water outlet pipe (3), the air inlet pipe (5), the water inlet pipe (6), and the thermocouple tube (4) are all welded to the furnace cover (7).

3. The novel atmosphere sintering pit furnace according to claim 1, characterized in that: The bottom end of the thermocouple tube (4) is located in the middle of the interior of the furnace body (9), and the bottom end of the air inlet pipe (5) passes through the high-temperature resistant gasket (10) and extends to the bottom of the interior of the furnace body (9).

4. The novel atmosphere sintering pit furnace according to claim 1, characterized in that: A handle (2) is fixedly welded onto the furnace cover (7).

5. A novel atmosphere sintering pit furnace according to claim 1, characterized in that: The surface of the high-temperature resistant gasket (10) has multiple through holes, and the air inlet pipe (5) is movably inserted into the inside of the through holes without interfering with the high-temperature resistant gasket (10).

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