Large-size metal heat preservation screen high-vacuum high-pressure horizontal gas quenching furnace

Abstract

The utility model provides a large-size metal heat preservation screen high-vacuum high-pressure horizontal gas quenching furnace which comprises a furnace body and a sucking pump, the furnace body is a cylindrical horizontal furnace body, one end of the furnace body is provided with a gate, the other end of the furnace body is provided with a gas inlet controlled by a gas cut-off valve, the inner diameter of the cross section of the furnace body ranges from 1.5 m to 2 m, and the length of the furnace body ranges from 3 m to 3.5 m; a metal heat preservation screen is arranged along the inner wall of a hearth of the furnace body, is provided with more than three metal heat preservation layers, and is connected with a base of the furnace body through a supporting beam; the furnace body is provided with more than three heating devices which are uniformly distributed; the two sides of the furnace body are each provided with an air extracting pump, each air extracting pump is provided with an air extracting opening, and the air extracting openings are communicated with the inner space of a hearth of the furnace body. According to the scheme, a large aviation workpiece can be contained in the large furnace body to be machined, the two air pumps are arranged on the two sides of the furnace body, extraction of gas in the furnace is accelerated, and the temperature in the furnace is balanced through the three or more evenly-arranged heating devices.

Description

Technical Field

[0001] The present application relates to the technical field of aviation equipment manufacturing, and in particular to a gas quenching furnace. Background Art

[0002] With the continuous upgrading of the domestic aviation industry, there is an increasing demand for processing larger and larger workpieces in the aviation industry. Traditional large-scale aviation workpieces are composed of multiple smaller workpieces. Now more and more aviation workpieces are formed in one piece, and the size is getting bigger and bigger, especially for gas quenching furnaces used for tempering, quenching and other processes. The existing technology can no longer meet the processing needs of large aviation workpieces. Utility Model Content

[0003] One purpose of the present application is to provide a large-sized metal insulation screen high-vacuum high-pressure horizontal gas quenching furnace to solve at least one of the above-mentioned technical problems.

[0004] The present application provides a large-size metal insulation screen high-vacuum high-pressure horizontal gas quenching furnace, comprising: a furnace body and an exhaust pump,

[0005] The furnace body is a cylindrical horizontal furnace body, a gate is provided at one end of the furnace body, and an air inlet controlled by a gas cut-off valve is provided at the other end, the inner diameter of the cross section of the furnace body is between 1.5 meters and 2 meters, and the length of the furnace body is between 3 meters and 3.5 meters;

[0006] A metal heat-insulating screen is provided along the inner wall of the furnace chamber of the furnace body, the metal heat-insulating screen has more than three metal heat-insulating layers, and the metal heat-insulating screen is connected to the base of the furnace body through a support beam;

[0007] The furnace body is provided with more than three uniformly arranged heating devices;

[0008] An air pump is disposed on each side of the furnace body. The air pump has an air suction port, and the air suction port is connected to the internal space of the furnace chamber of the furnace body.

[0009] Preferably, the thickness of the metal insulation layer is between 8 cm and 12 cm.

[0010] Preferably, the distance between the metal insulation layers is between 5 cm and 5.5 cm.

[0011] Preferably, a closed space is provided between each metal insulation layer, and the vacuum pump further has a plurality of vacuum pipes, each vacuum pipe corresponding to the closed space between each metal insulation layer, and the vacuum pipe is connected to the closed space between the corresponding metal insulation layers by penetrating the metal insulation layers.

[0012] Preferably, the inner diameter of the exhaust pipe is between 2 cm and 2.8 cm.

[0013] Preferably, the door body of the gate is a hollow structure and is provided with an air intake port, and the air intake port is provided with a one-way gas valve.

[0014] Compared with the prior art, the present application provides a large-size metal insulation screen high-vacuum high-pressure horizontal gas quenching furnace, comprising: a furnace body and an exhaust pump, wherein the furnace body is a cylindrical horizontal furnace body, a gate is provided at one end of the furnace body, and an air inlet controlled by a gas shut-off valve is provided at the other end, the inner diameter of the furnace body cross section is between 1.5 meters and 2 meters, and the length of the furnace body is between 3 meters and 3.5 meters; a metal insulation screen is provided along the inner wall of the furnace chamber of the furnace body, the metal insulation screen has more than three layers of metal insulation layers, and the metal insulation screen is connected to the base of the furnace body through a support beam; the furnace body is provided with more than three evenly arranged heating devices; an exhaust pump is provided on each side of the furnace body, and the exhaust pump has an exhaust port, and the exhaust port is connected to the internal space of the furnace chamber of the furnace body. This solution can accommodate large-scale aviation workpieces for processing through a larger furnace body, and set two vacuum pumps on both sides of the furnace body to accelerate the extraction of gas in the furnace, and then balance the temperature in the furnace through more than three evenly arranged heating devices, which solves the problem that large-scale aviation workpieces cannot be processed well in the prior art and meets the processing needs of large-scale aviation workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0016] Figure 1 This is a front side view of one embodiment of the large-size metal insulation screen high vacuum high pressure horizontal gas quenching furnace described in this application;

[0017] Figure 2 This is a rear side view of one embodiment of the large-size metal insulation screen high vacuum high pressure horizontal gas quenching furnace described in this application;

[0018] The same or similar reference numerals in the drawings represent the same or similar components. DETAILED DESCRIPTION

[0019] Combine the following Figure 1 and Figure 2 The above-mentioned large-size metal insulation screen high-vacuum high-pressure horizontal gas quenching furnace of the present application is further elaborated.

[0020] The present application provides a large-size metal insulation screen high-vacuum high-pressure horizontal gas quenching furnace, comprising: a furnace body 1 and an exhaust pump 5, wherein the furnace body 1 is a cylindrical horizontal furnace body with a gate 2 at one end and an air inlet 3 controlled by a gas cut-off valve at the other end, the inner diameter of the cross section of the furnace body 1 is between 1.5 meters and 2 meters, and the length of the furnace body is between 3 meters and 3.5 meters; a metal insulation screen is provided along the inner wall of the furnace chamber of the furnace body 1, the metal insulation screen has more than three layers of metal insulation layers, and the metal insulation screen is connected to the base of the furnace body through a support beam; the furnace body is provided with more than three evenly arranged heating devices 6; an exhaust pump 5 is provided on each side of the furnace body to connect to the internal space of the furnace chamber of the furnace body.

[0021] The furnace body 1 is a cylindrical horizontal furnace body, one end of which is provided with a gate 2 for opening and closing. The inner diameter of the cross section of the furnace body 1 is between 1.5 meters and 2 meters, preferably 1.8 meters, and the length of the furnace body 1 is between 3 meters and 3.5 meters, preferably 3.2 meters. A larger space can be formed inside the furnace body 1. In the processing test of aviation workpieces, it is found that this size can not only accommodate most of the existing various aviation workpieces into this space, but also maintain high work efficiency and low economic cost in the exhaust and heating links. The air inlet 3 is opened when it is necessary to balance the air pressure inside the furnace with the outside air pressure, and the air intake speed can be controlled by the air shut-off valve. When the air inlet 3 is set, an air outlet 4 can be set accordingly.

[0022] The inner wall of the furnace chamber of the furnace body 1 is provided with a metal insulation screen, which has more than three layers of metal insulation layers to better maintain the temperature in the furnace and prevent heat loss. The metal thermos bottle is used to maintain the ambient temperature in the furnace body 1, and the heating device 6 is used to process the heat process. More than three and evenly arranged heating devices are set in the furnace body 1 to facilitate simultaneous heating of various parts and areas in the furnace body 1 to balance the temperature and prevent uneven temperature in the furnace body 1 from affecting the process quality. This solution can accommodate large aviation workpieces for processing through a larger furnace body 1, and two vacuum pumps 5 are set on both sides of the furnace body 1 to communicate with the internal space of the furnace chamber respectively, to accelerate the extraction of gas in the furnace, and then balance the temperature in the furnace through more than three evenly arranged heating devices 6, which solves the problem that large aviation workpieces cannot be processed well in the prior art and meets the processing needs of large aviation workpieces.

[0023] In some embodiments of the present application, the thickness of the metal insulation layer is between 8 cm and 12 cm.

[0024] The metal insulation layer is used to maintain the ambient temperature in the furnace and to meet the requirements for cleanliness in the furnace. Through experiments, the thickness of the metal insulation layer is between 8 cm and 12 cm, and preferably 10 cm. On the one hand, the metal insulation layer will not be too thick, causing a large amount of heat loss in the furnace, increasing the heating cost, and will not be too thin to withstand the air pressure and cause deformation, further improving the processing efficiency and process quality of the process.

[0025] In some embodiments of the present application, the distance between the metal insulation layers is between 5 cm and 5.5 cm.

[0026] The preferred distance is 5.3 cm. The space between the metal insulation layers is not completely vacuum. If the distance between the metal insulation layers is too close, the reserved space will be insufficient, which will accelerate the heat loss. If the distance is too far, it will not only affect the storage space in the furnace, but also increase the support pressure of the support beams supporting each metal insulation layer, which will indirectly lead to excessively high production costs. After multiple measurements, a distance of 5 cm to 5.5 cm can maintain relatively small heat loss under certain conditions, further improving the processing efficiency and process quality of the process.

[0027] In some embodiments of the present application, a closed space is provided between each metal insulation layer, and the vacuum pump further has a plurality of vacuum pipes, each vacuum pipe corresponding to a closed space between each metal insulation layer, and the vacuum pipe is connected to the closed space between the corresponding metal insulation layers by penetrating the metal insulation layers.

[0028] A closed space can be set between each metal insulation layer. The exhaust pump 5 has multiple exhaust pipes. The exhaust pipes correspond to the closed spaces between each metal insulation layer. One exhaust pipe can correspond to one closed space between the metal insulation layers. The exhaust pipe is connected to the closed space between the metal insulation layers. The vacuum degree in the closed space can be adjusted according to actual needs, so as to control the temperature loss rate in the furnace body 1. It can cooperate with the heating device 6 to control the temperature change rate in the furnace body 1 according to the requirements of different aviation workpieces, thereby further improving the processing efficiency and process quality of the process flow.

[0029] In some embodiments of the present application, the inner diameter of the exhaust pipe is between 2 cm and 2.8 cm.

[0030] Under a certain suction power of the suction pump 5, the inner diameter of the suction pipe is set between 2 cm and 2.8 cm, preferably 2.5 cm. According to the test, a too small inner diameter of the suction pipe will lead to a slow air flow rate and low suction efficiency. Although a too large inner diameter can pump out the air faster, it will increase the working pressure of the suction pump 5, indirectly leading to an increase in process costs. Therefore, using an inner diameter between 2 cm and 2.8 cm can further improve the processing efficiency of the process and reduce the process cost.

[0031] In some embodiments of the present application, the door body of the gate is a hollow structure and is provided with an air intake port, and the air intake port is provided with a one-way gas valve.

[0032] Gate 2 adopts a hollow structure, which can increase the thermal insulation effect of gate 2 and prevent heat from being lost too quickly through gate 2, affecting the processing efficiency and process quality of the process. The vacuum state in the hollow structure of gate 2 can be adjusted through the air intake port, and a single gas valve is set to further improve the processing efficiency and process quality of the process.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

Claims

1. Large size metal insulation screen high vacuum high pressure horizontal gas quenching furnace, including: The furnace body and the vacuum pump are characterized by: The furnace body is a cylindrical horizontal furnace body, a gate is provided at one end of the furnace body, and an air inlet controlled by a gas cut-off valve is provided at the other end, the inner diameter of the cross section of the furnace body is between 1.5 meters and 2 meters, and the length of the furnace body is between 3 meters and 3.5 meters; A metal heat-insulating screen is provided along the inner wall of the furnace chamber of the furnace body, the metal heat-insulating screen has more than three metal heat-insulating layers, and the metal heat-insulating screen is connected to the base of the furnace body through a support beam; The furnace body is provided with more than three uniformly arranged heating devices; An air pump is disposed on each side of the furnace body. The air pump has an air suction port, and the air suction port is connected to the internal space of the furnace chamber of the furnace body.

2. According to claim 1, the large-size metal insulation screen high vacuum high pressure horizontal gas quenching furnace is characterized by: The thickness of the metal insulation layer is between 8 cm and 12 cm.

3. According to claim 1, the large-size metal insulation screen high vacuum high pressure horizontal gas quenching furnace is characterized by: The distance between the metal insulation layers is between 5 cm and 5.5 cm.

4. According to claim 1, the large-size metal insulation screen high vacuum high pressure horizontal gas quenching furnace is characterized by: A closed space is arranged between each metal insulation layer. The vacuum pump also has a plurality of vacuum pipes, each vacuum pipe corresponds to a closed space between each metal insulation layer. The vacuum pipe is connected to the closed space between the corresponding metal insulation layers by penetrating the metal insulation layers.

5. According to claim 4, the large-size metal insulation screen high vacuum high pressure horizontal gas quenching furnace is characterized in that: The inner diameter of the air extraction pipeline is between 2 cm and 2.8 cm.

6. According to claim 1, the large-size metal insulation screen high vacuum high pressure horizontal gas quenching furnace is characterized by: The door body of the gate is a hollow structure and is provided with an air intake port, and the air intake port is provided with a one-way gas valve.

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