Antifouling device for powder metallurgy sintering furnace
By designing anti-fouling devices in powder metallurgy sintering furnaces, and using sewage barrier umbrellas and sewage insulation pipes to avoid high-temperature gases from contacting transparent glass, the problem of volatiles affecting temperature measurement accuracy is solved, ensuring accurate measurement and safe operation of the temperature in the furnace.
Patent Information
- Application Number
- CN202420201070.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-29
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-29
AI Technical Summary
Volatiles in high-temperature gases in powder metallurgy sintering furnaces will condense on transparent glass, affecting the temperature measurement accuracy of the optical thermometer, resulting in temperature loss and burnout of the heat field.
A dustproof device for powder metallurgy sintering furnace is designed, including setting a cone surface and ventilation hole on the heating body and insulation material in the furnace shell, and a dustproof umbrella and sewage insulation pipe are provided in the temperature measurement hole to pass through the air flow Channels and cylindrical support to avoid high-temperature gases from contacting transparent glass, and use infrared thermometers to set up correspondingly with sewage insulation pipes and sewage barriers.
Effectively prevent high-temperature gas from polluting transparent glass, ensure the temperature measurement accuracy of infrared thermometer, avoid temperature loss and burnout of heat field, the structure is simple and easy to use.
Smart Images
Figure CN222211243U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the application field of industrial furnaces, in particular to an anti-fouling device for a powder metallurgy sintering furnace. Background Art
[0002] As is known, powder metallurgy is a process technology for preparing metal powder or using metal powder or a mixture of metal powder and non-metallic powder as raw materials, and manufacturing metal materials, composite materials and various types of products through forming and sintering; a binder is usually added when the metal powder is mixed, and the binder produces volatiles to varying degrees during sintering, purity problems in the raw materials used will also produce volatiles to varying degrees during sintering, or volatiles will be produced in the heat-resistant / insulating materials, and the presence of volatiles will affect the temperature measurement accuracy of the temperature measurement system; because during the use of the sintering furnace, the high-temperature gas rises to the upper observation window and meets the transparent glass on the top, when the high-temperature gas encounters the cooler transparent glass, the low-melting-point volatiles contained in the gas will condense on the transparent glass of the observation window, and the volatiles bonded to the transparent glass will continue to thicken as the sintering furnace continues to work, thereby affecting the accuracy of the optical thermometer arranged on the top of the furnace, causing the temperature measurement accuracy to decrease, and in the most extreme case, the temperature in the furnace will be out of control and the thermal field will be burned. Summary of the invention
[0003] In order to overcome the deficiencies in the background technology, the utility model discloses an anti-fouling device for a powder metallurgy sintering furnace.
[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:
[0005] A pollution prevention device for a powder metallurgy sintering furnace comprises a furnace shell, a heat-insulating material and a heating element. The furnace shell is provided with a heating element, and a house-shaped heat-insulating material is provided on the outside of the heating element. The upper part of the heat-insulating material is arranged as a cone surface, and air vents are arranged around the cone surface. A temperature measuring hole is arranged in the middle of the cone surface, and a pollution-blocking umbrella is arranged in the temperature measuring hole in the middle. The pollution-blocking umbrella comprises a central circular tube and an umbrella-shaped circular ring fixed on the upper outer surface of the central circular tube. The bottom of the central circular tube is a sealed end and is arranged in the heat-insulating material. An air flow channel is arranged between the central circular tube and the temperature measuring hole. A plurality of cylinders are fixed on the inner cone surface of the umbrella-shaped circular ring and are evenly spaced along its circumferential direction. The plurality of cylinders are supported on the upper outer surface of the heat-insulating material. An observation window connected by an observation window pipe is arranged on the top of the furnace shell. A pollution-blocking tube fixed by a circular ring sheet is arranged in the observation window pipe. The central hole of the pollution-blocking tube is arranged correspondingly to the central circular tube of the pollution-blocking umbrella.
[0006] The anti-fouling device for the powder metallurgy sintering furnace is provided with transparent glass in the middle of the observation window.
[0007] In the anti-fouling device for the powder metallurgy sintering furnace, the dirt-isolating pipe is sealed and fixed to the inner ring surface of the circular ring, and the outer ring surface of the circular ring is sealed and fixed to the inner wall of the observation window pipe.
[0008] The anti-fouling device for the powder metallurgy sintering furnace is provided with an air flow channel at the bottom of the heat insulating material.
[0009] The anti-fouling device for the powder metallurgy sintering furnace is provided with an infrared thermometer on the outside of the top of the furnace shell, and the infrared thermometer is respectively arranged correspondingly to the central circular tube of the dirt isolation pipe and the dirt blocking umbrella.
[0010] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:
[0011] The anti-fouling device for a powder metallurgy sintering furnace described in the utility model, by arranging a pollution shielding umbrella, prevents high-temperature gas from entering the upper pollution isolation pipe. Through the isolation effect of the pollution isolation pipe, the high-temperature gas will not contact the transparent glass on the upper part of the observation window, thereby preventing pollutants in the gas in the furnace from contaminating the transparent glass, and also preventing inaccurate temperature measurement accuracy of the infrared thermometer arranged on the furnace top, thereby preventing the temperature in the furnace from getting out of control and burning the thermal field. The utility model has a simple structure and is easy to use, which ensures the accuracy of the temperature measurement accuracy of the infrared thermometer on the furnace top. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model.
[0013] Figure 2 It is a schematic diagram of airflow circulation in the furnace of the utility model.
[0014] In the figure: 1. furnace shell; 2. infrared thermometer; 3. observation window; 4. transparent glass; 5. dirt isolation pipe; 6. dirt shielding umbrella; 7. thermal insulation material; 8. heating element. DETAILED DESCRIPTION
[0015] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.
[0016] Combined with Figure 1-2The anti-fouling device for a powder metallurgy sintering furnace comprises a furnace shell 1, a heat-insulating material 7 and a heating element 8. The heating element 8 is arranged in the furnace shell 1, and a house-shaped heat-insulating material 7 is arranged outside the heating element 8. The upper part of the heat-insulating material 7 is arranged as a cone, and vents are arranged around the cone. A temperature measuring hole is arranged in the middle of the cone, and a pollution-blocking umbrella 6 is arranged in the temperature measuring hole in the middle. The pollution-blocking umbrella 6 comprises a central circular tube and an umbrella-shaped circular ring fixed on the outer surface of the upper part of the central circular tube. The bottom of the central circular tube is a sealed end and is arranged in the heat-insulating material 7. An airflow channel is arranged between the central circular tube and the temperature measuring hole. On the inner cone surface of the umbrella-shaped circular ring and along its circumferential direction, an airflow channel is arranged between the central circular tube and the temperature measuring hole. A plurality of cylinders are evenly fixed and supported on the upper outer surface of the heat-insulating material 7; an observation window 3 connected by an observation window pipe is provided on the top of the furnace shell 1; a dirt-isolating pipe 5 fixed by a circular ring is provided in the observation window pipe; a central hole of the dirt-isolating pipe 5 and a central circular tube of a dirt-blocking umbrella 6 are arranged correspondingly up and down; the dirt-isolating pipe 5 and the inner ring surface of the circular ring are sealed and fixed; the outer ring surface of the circular ring is sealed and fixed to the inner wall of the observation window pipe; a transparent glass 4 is provided in the middle of the observation window 3; an infrared thermometer 2 is provided on the outside of the top of the furnace shell 1; the infrared thermometer 2 and the central circular tubes of the dirt-isolating pipe 5 and the dirt-blocking umbrella 6 are respectively arranged correspondingly up and down.
[0017] Furthermore, an air flow channel is provided at the bottom of the thermal insulation material 7 .
[0018] In the implementation of the anti-fouling device for a powder metallurgy sintering furnace described in the utility model, during the normal operation of the sintering furnace, the furnace shell 1 is filled with gas, and high-density colder gas enters the interior of the thermal field from the bottom of the thermal field, that is, enters the interior of the thermal insulation material 7 from the air flow channel at the bottom of the thermal insulation material 7. The high temperature in the thermal field heats the low-temperature gas entering the interior of the thermal insulation material 7 into high-temperature gas, and the high-temperature gas is discharged upward from the gap between the vents around the top of the thermal insulation material 7, the central circular tube of the pollution-blocking umbrella 6 and the temperature measuring hole at the center of the top of the thermal insulation material 7. When encountering the obstruction of the umbrella-shaped ring, the gas flows out from the edge of the umbrella, as shown in the attached figure. Figure 2 As shown; after the high-temperature gas is discharged from the inside of the hot field, the gas in contact with the inner wall of the furnace shell 1 is changed into a lower temperature gas through heat exchange, and the density of the gas is changed from low-density gas to high-density gas, so that the gas will flow downward along the inner wall of the furnace shell; when the high-temperature gas rises to the dirt isolation tube 5, the high-temperature gas will only flow upward along the outer wall of the dirt isolation tube until it encounters the circular ring fixed on the upper part of the dirt isolation tube. Since the high-temperature gas is changed into a low-temperature gas with a higher density after heat exchange with the circular ring, the low-temperature gas with a higher density will flow downward along the inner wall of the observation window, and flow all the way to the inside of the furnace shell 1 and merge with the gas inside the furnace shell 1; the infrared thermometer 2 senses the temperature of the central circular tube of the dirt shielding umbrella 6 through the transparent glass 4 and the central hole of the dirt isolation tube 5 in turn, and the measurement is more accurate.
[0019] The parts not described in detail in this utility model are prior art.
[0020] The embodiments selected in this article for the purpose of disclosing the invention of the utility model are currently considered to be suitable, but it should be understood that the utility model is intended to include all changes and improvements of the embodiments that belong to the scope of the present concept and utility model.
Claims
1. An anti-fouling device for a powder metallurgy sintering furnace, comprising a furnace shell, a heat-insulating material and a heating element, characterized in that: A heating element is arranged in the furnace shell, and a house-shaped heat-insulating material is arranged on the outside of the heating element. The upper part of the heat-insulating material is arranged as a cone, and vents are arranged around the cone, a temperature measuring hole is arranged in the middle of the cone, and a pollution-blocking umbrella is arranged in the temperature measuring hole in the middle. The pollution-blocking umbrella comprises a central circular tube and an umbrella-shaped circular ring fixed on the upper outer surface of the central circular tube. The bottom of the central circular tube is a sealed end and arranged in the heat-insulating material. An air flow channel is arranged between the central circular tube and the temperature measuring hole. A plurality of cylinders are fixed on the inner cone surface of the umbrella-shaped circular ring and are evenly spaced along its circumferential direction. The plurality of cylinders are supported on the upper outer surface of the heat-insulating material. An observation window connected by an observation window pipe is arranged on the top of the furnace shell. A pollution-blocking pipe fixed by a circular ring sheet is arranged in the observation window pipe. The central hole of the pollution-blocking pipe corresponds to the central circular tube of the pollution-blocking umbrella in upper and lower directions.
2. The anti-fouling device for a powder metallurgy sintering furnace according to claim 1, characterized in that: Transparent glass is arranged in the middle of the observation window.
3. The anti-fouling device for a powder metallurgy sintering furnace according to claim 1, characterized in that: The dirt-isolating pipe is sealed and fixed to the inner ring surface of the circular ring piece, and the outer ring surface of the circular ring piece is sealed and fixed to the inner wall of the observation window pipe.
4. The anti-fouling device for a powder metallurgy sintering furnace according to claim 1, characterized in that: An air flow channel is provided at the bottom of the thermal insulation material.
5. The anti-fouling device for a powder metallurgy sintering furnace according to claim 1, characterized in that: An infrared thermometer is arranged outside the top of the furnace shell, and the infrared thermometer is respectively arranged correspondingly to the central circular tube of the dirt isolation pipe and the dirt blocking umbrella.