Degreasing device of vacuum heat treatment furnace

Abstract

The utility model discloses a degreasing device of a vacuum heat treatment furnace, belongs to the technical field of sintering equipment, and aims to solve the problem of how to improve the liquefaction efficiency of high-temperature gas. The vacuum heat treatment furnace degreasing device comprises a degreasing box, an air inlet pipe, a first degreasing transverse pipe, a cooling pipe, a degreasing vertical pipe and an air outlet pipe. The degreasing box is provided with a cooling cavity, a liquid discharge pipe, an air inlet guide pipe and an air outlet guide pipe; the liquid discharge pipe, the air inlet guide pipe and the air outlet guide pipe are communicated with the cooling cavity; the other end of the first degreasing transverse pipe is connected with an air inlet guide pipe of the degreasing box; the cooling pipe is located in the cooling cavity, the first end of the cooling pipe is connected with the inner wall of the degreasing box, the second end of the cooling pipe linearly extends in the length direction of the cooling cavity and is provided with an opening, the cooling pipe divides the cooling cavity into two cavities, and the cavities in the cooling pipe communicate with the air outlet guide pipe. The bottom end of the degreasing vertical pipe is connected with the air outlet guide pipe of the degreasing box, the top end of the degreasing vertical pipe is connected with the air outlet pipe, and a Pall ring is arranged on the inner wall of the degreasing vertical pipe.

Description

Technical Field

[0001] This application relates to the field of sintering equipment technology, and in particular to a degreasing device for a vacuum heat treatment furnace. Background Technology

[0002] A cemented carbide vacuum heat treatment furnace is a furnace that operates at high temperatures. Its core function is to promote the bonding of solid particles within the cemented carbide, thereby achieving grain growth. During this process, voids and grain boundaries gradually decrease, resulting in a dense polycrystalline sintered body with a specific microstructure. Simultaneously, the high-temperature environment of the vacuum heat treatment furnace allows organic binders to decompose into gases, facilitating their subsequent removal. The cemented carbide degreasing device is specifically designed to remove grease, wax, or other organic binders from the decomposed gases.

[0003] Existing cemented carbide degreasing devices typically send high-temperature gas containing forming agent components flowing out of a pressure vacuum heat treatment furnace into a water tank. The water tank cools the high-temperature gas, and the liquefied forming agent flows into the water tank for collection. However, due to the limited heat exchange area within the water tank, the liquefaction efficiency of the water tank for high-temperature gas is insufficient.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This application provides a degreasing device for a vacuum heat treatment furnace, which can solve the problem of how to improve the efficiency of high-temperature gas liquefaction in the prior art.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0009] A degreasing device for a vacuum heat treatment furnace is provided, the degreasing device comprising: a degreasing chamber, an air inlet pipe, a first degreasing horizontal pipe, a cooling pipe, a degreasing vertical pipe, and an air outlet pipe;

[0010] The degreasing chamber is equipped with a cooling chamber, a drain pipe, an air inlet pipe, and an air outlet pipe, and the drain pipe, air inlet pipe, and air outlet pipe are connected to the cooling chamber;

[0011] One end of the first degreasing horizontal tube is connected to the air inlet pipe, and the other end is connected to the air inlet duct of the degreasing box;

[0012] The cooling pipe is located inside the cooling chamber, with its first end connected to the inner wall of the degreasing box and its second end extending straight along the length of the cooling chamber and having an opening. The cooling pipe divides the cooling chamber into two chambers, and the chamber inside the cooling pipe is connected to the air outlet duct.

[0013] The degreasing riser is vertically arranged, with its bottom end connected to the air outlet pipe of the degreasing box and its top end connected to the air outlet pipe. The inner wall of the degreasing riser is provided with a Pall ring.

[0014] In some embodiments, the cooling pipe is inclined relative to the horizontal plane at an angle of 1 to 5 degrees, and the first end of the cooling pipe is higher than its second end.

[0015] In some embodiments, the degreasing tank is inclined relative to the horizontal plane at an angle of 3 to 10 degrees, and the drain pipe is located at the lower end of the degreasing tank.

[0016] In some embodiments, the first end of the cooling pipe is welded to the end face of the end at the higher horizontal level of the degreasing box.

[0017] In some embodiments, the first degreasing horizontal tube includes an inner tube and an outer tube that are sealed together. One end of the inner tube is connected to the air inlet pipe, and the other end is connected to the air inlet duct of the degreasing box. A first cavity is formed between the inner tube and the outer tube, and the first cavity is provided with a first liquid inlet and a first liquid outlet.

[0018] In some embodiments, the degreasing riser includes a vertically arranged degreasing inner tube and a degreasing outer tube. The bottom end of the degreasing inner tube is connected to the air outlet conduit, and the top end is connected to the air outlet conduit. A second cavity is formed between the degreasing inner tube and the degreasing outer tube. The second cavity is provided with a second liquid inlet and a second liquid outlet. The Pall ring is fixed to the inner wall of the degreasing inner tube.

[0019] In some embodiments, the bottom end of the degreasing outer tube is provided with a connecting tube, the bottom end of the connecting tube is connected to the air outlet conduit, the top end is sealed to the degreasing inner tube, and extends into the interior of the degreasing inner tube; the interior of the degreasing inner tube is provided with a connector communicating with the top of the connecting tube, and the connector is provided with at least two air outlets facing different directions.

[0020] In some embodiments, a rod is connected to the top of the connector, the rod extends along the length of the degreasing inner tube and is provided with a filter plate, the filter plate is perpendicular to the length of the degreasing inner tube and has a plurality of filter holes evenly distributed thereon.

[0021] (III) Beneficial Effects

[0022] Compared with the prior art, the beneficial effects of the technical solution provided in this application include at least the following:

[0023] When the vacuum heat treatment furnace degreasing device of this application is working, the high-temperature gas in the vacuum heat treatment furnace first enters the first degreasing horizontal pipe through the inlet pipe for preliminary cooling, then enters the cooling chamber in the degreasing box for secondary cooling and liquefaction, then enters the interior of the cooling pipe and enters the degreasing vertical pipe for further liquefaction, and finally exits from the outlet pipe; the liquefied liquid collects in the degreasing box and is discharged from the drain pipe. During liquefaction in the degreasing box, since the cooling pipe is located in the cooling chamber, and its first end is connected to the inner wall of the degreasing box, and its second end extends linearly along the length of the cooling chamber and has an opening, the cooling pipe in the cooling chamber divides the cooling chamber into two chambers. The high-temperature gas can not only exchange heat with the inner wall of the degreasing box, but also with the cooling pipe. Compared with the existing degreasing devices that only exchange heat through the degreasing box, the vacuum heat treatment furnace degreasing device of this application improves the liquefaction efficiency of high-temperature gas. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a perspective view of the degreasing device of the vacuum heat treatment furnace in the embodiments of this application;

[0026] Figure 2 This is a top view of the vacuum heat treatment furnace degreasing device in the embodiments of this application;

[0027] Figure 3 yes Figure 2 A sectional view of section A in the middle;

[0028] Figure 4 yes Figure 2 A sectional perspective view of section B in the middle;

[0029] Figure 5 yes Figure 4 A schematic diagram of region C in the middle.

[0030] Figure label:

[0031] Degreasing chamber 1, cooling chamber 11, drain pipe 12, air inlet pipe 13, air outlet pipe 14;

[0032] Intake pipe 2;

[0033] First degreasing horizontal tube 3, inner tube 31, outer tube 32, first sleeve 33, first liquid inlet 34, first liquid outlet 35;

[0034] Cooling pipe 4, first end 41, second end 42, opening 43;

[0035] 5. Degreasing vertical tube, bottom end 51, top end 52, Pall ring 53, degreasing inner tube 54, degreasing outer tube 55, second sleeve 56, second liquid inlet 57, second liquid outlet 58, connecting tube 59, connector 510, air outlet 511, support rod 512, filter plate 513;

[0036] Air outlet pipe 6.

[0037] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0040] Existing vacuum heat treatment furnace degreasing equipment.

[0041] To solve the above-mentioned technical problems, this embodiment provides a degreasing device for a vacuum heat treatment furnace.

[0042] The degreasing device of the vacuum heat treatment furnace includes: a degreasing box 1, an air inlet pipe 2, a first degreasing horizontal pipe 3, a cooling pipe 4, a degreasing vertical pipe 5, and an air outlet pipe 6.

[0043] The degreasing chamber 1 is equipped with a cooling chamber 11, a drain pipe 12, an air inlet pipe 13, and an air outlet pipe 14. The drain pipe 12, the air inlet pipe 13, and the air outlet pipe 14 are connected to the cooling chamber 11.

[0044] One end of the first degreasing horizontal pipe 3 is connected to the air inlet pipe 2, and the other end is connected to the air inlet duct 13 of the degreasing box 1. The air inlet pipe 2 is connected to the furnace body of the high-temperature vacuum heat treatment furnace and is used to transport the high-temperature gas in the furnace body to the first degreasing horizontal pipe 3. The first degreasing horizontal pipe 3 is used for the preliminary liquefaction of the high-temperature gas.

[0045] The cooling pipe 4 is located inside the cooling chamber 11, and its first end 41 is connected to the inner wall of the degreasing box 1. Its second end 42 extends in a straight line along the length of the cooling chamber 11 and has an opening 43. The cooling pipe 4 divides the cooling chamber 11 into two chambers, and the chamber inside the cooling pipe 4 is connected to the air outlet duct 14.

[0046] The degreasing riser 5 is set vertically, and its bottom end 51 is connected to the air outlet pipe 14 of the degreasing box 1, and its top end 52 is connected to the air outlet pipe 6. The inner wall of the degreasing riser 5 is provided with a Pall ring 53 to enhance the contact area between the gas and the inner wall and promote the separation of wax.

[0047] In some embodiments, the cooling pipe 4 is inclined relative to the horizontal plane at an angle of 1 to 5 degrees, and the first end 41 of the cooling pipe 4 is higher than its second end 42. With this configuration, the liquid obtained by liquefying the high-temperature gas in the degreasing riser 5 flows into the cooling pipe 4 and then automatically flows along the cooling pipe 4 to the cooling chamber 11 for collection.

[0048] To facilitate the discharge of the collected liquid, the degreasing tank 1 is inclined relative to the horizontal plane at an angle of 3 to 10 degrees, and the drain pipe 12 is located at the lower end of the degreasing tank 1.

[0049] In one embodiment where the first end 41 of the cooling pipe 4 is connected to the inner wall of the degreasing box 1, the first end 41 of the cooling pipe 4 is welded to the end face of the end of the degreasing box 1 at the higher horizontal level.

[0050] In one embodiment of the first degreasing horizontal tube 3, the first degreasing horizontal tube 3 includes an inner tube 31 and an outer tube 32 that are sealed together. Specifically, the outer tube 32 is sleeved on the outside of the inner tube 31 and is fixed to the inner tube 31 at both ends by welding and sealing. One end of the inner tube 31 is connected to the air inlet pipe 2, and the other end is connected to the air inlet duct 13 of the degreasing box 1. A first cavity 33 is formed between the inner tube 31 and the outer tube 32. The first cavity 33 is provided with a first liquid inlet 34 and a first liquid outlet 35. The first liquid inlet 34 delivers coolant into the first cavity 33, and the first liquid outlet 35 outputs coolant, thus forming a coolant circulation, so that the coolant can continuously remove the heat of the high-temperature gas in the first degreasing horizontal tube 3.

[0051] Understandably, the first degreased horizontal tube 3 can also use existing degreased horizontal tubes, such as fittings with internal Pall rings.

[0052] In one embodiment of the degreasing riser 5, the degreasing riser 5 includes a vertically arranged inner degreasing tube 54 and an outer degreasing tube 55. The bottom end of the inner degreasing tube 54 is connected to the air outlet conduit 14, and the top end is connected to the air outlet conduit 6. A second cavity 56 is formed between the inner degreasing tube 54 and the outer degreasing tube 55. The second cavity 56 is provided with a second liquid inlet 57 and a second liquid outlet 58. A Pall ring 53 is fixed to the inner wall of the inner degreasing tube 54. The second liquid inlet 57 delivers coolant into the second cavity 56, and the second liquid outlet 58 outputs coolant, thus forming a coolant circulation, allowing the coolant to continuously remove the heat from the high-temperature gas inside the degreasing riser 5, causing it to liquefy.

[0053] Furthermore, the connection between the bottom end of the degreasing riser 5 and the air outlet duct 14 of the degreasing chamber 1, and the connection between the top end and the air outlet pipe 6, can be achieved as follows: the bottom end of the degreasing outer pipe 55 is provided with a connecting pipe 59, the bottom end of the connecting pipe 59 is connected to the air outlet duct 14, and the top end is sealed to the degreasing inner pipe 54 and extends into the interior of the degreasing inner pipe 54; the interior of the degreasing inner pipe 54 is provided with a connector 510 communicating with the top of the connecting pipe 59, and the connector 510 is provided with at least two air outlets 511 facing different directions. With this configuration, high-temperature gas can flow out in different directions through the air outlets 511, resulting in more uniform and efficient cooling, thereby improving the cooling efficiency of the degreasing riser 5.

[0054] Furthermore, a support rod 512 is installed at the top of the connector 510 by welding or threaded connection. The support rod 512 extends along the length of the degreasing inner tube 54. The support rod 512 fixes two filter plates 513 by welding or threaded connection. The filter plates 513 are perpendicular to the length of the degreasing inner tube 54 and have a number of filter holes evenly distributed. The filter holes can filter some impurities and make the flow of high temperature gas more uniform, thereby improving the liquefaction effect.

[0055] Furthermore, the section connecting the vent pipe 6 to the degreasing inner tube 54 is inclined so that the liquid obtained by liquefaction in the vent pipe 6 can automatically flow into the degreasing inner tube 54.

[0056] When the vacuum heat treatment furnace degreasing device of this application is working, the high-temperature gas in the vacuum heat treatment furnace first enters the first degreasing horizontal pipe 3 through the inlet pipe 2 for preliminary cooling, then enters the cooling chamber 11 in the degreasing box 1 for secondary cooling and liquefaction, then enters the interior of the cooling pipe 4, and then enters the degreasing vertical pipe 5 for further liquefaction, and finally exits from the outlet pipe 6; the liquefied liquid collects in the degreasing box 1 and is discharged from the drain pipe 12. During liquefaction in the degreasing box 1, since the cooling pipe 4 is located in the cooling chamber 11, and its first end 41 is connected to the inner wall of the degreasing box 1, and its second end 42 extends linearly along the length of the cooling chamber 11 and has an opening 43, the cooling pipe 4 divides the cooling chamber 11 into two chambers. The high-temperature gas can not only exchange heat with the inner wall of the degreasing box 1, but also with the cooling pipe 4. Compared with the degreasing devices in the prior art that only exchange heat through the degreasing box, the vacuum heat treatment furnace degreasing device of this application improves the liquefaction efficiency of the high-temperature gas.

[0057] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A degreasing device for a vacuum heat treatment furnace, characterized in that, include: Degreasing chamber, air inlet pipe, first degreasing horizontal pipe, cooling pipe, degreasing vertical pipe and air outlet pipe; The degreasing chamber is equipped with a cooling chamber, a drain pipe, an air inlet pipe, and an air outlet pipe, and the drain pipe, air inlet pipe, and air outlet pipe are connected to the cooling chamber; One end of the first degreasing horizontal tube is connected to the air inlet pipe, and the other end is connected to the air inlet duct of the degreasing box; The cooling pipe is located inside the cooling chamber, with its first end connected to the inner wall of the degreasing box and its second end extending straight along the length of the cooling chamber and having an opening. The cooling pipe divides the cooling chamber into two chambers, and the chamber inside the cooling pipe is connected to the air outlet duct. The degreasing riser is vertically arranged, with its bottom end connected to the air outlet pipe of the degreasing box and its top end connected to the air outlet pipe. The inner wall of the degreasing riser is provided with a Pall ring.

2. The degreasing apparatus for a vacuum heat treatment furnace according to claim 1, characterized in that, The cooling pipe is inclined relative to the horizontal plane at an angle of 1 to 5 degrees, and the first end of the cooling pipe is higher than its second end.

3. The degreasing apparatus for a vacuum heat treatment furnace according to claim 1, characterized in that, The degreasing box is tilted relative to the horizontal plane at an angle of 3 to 10 degrees, and the drain pipe is located at the lower end of the degreasing box.

4. The degreasing apparatus for a vacuum heat treatment furnace according to claim 3, characterized in that, The first end of the cooling pipe is welded to the end face of the higher end of the degreasing box.

5. The degreasing apparatus for a vacuum heat treatment furnace according to claim 1, characterized in that, The first degreasing horizontal tube includes an inner tube and an outer tube that are sealed together. One end of the inner tube is connected to the air inlet pipe, and the other end is connected to the air inlet duct of the degreasing box. A first cavity is formed between the inner tube and the outer tube, and the first cavity is provided with a first liquid inlet and a first liquid outlet.

6. The degreasing apparatus for a vacuum heat treatment furnace according to claim 1, characterized in that, The degreasing vertical tube includes a vertically arranged degreasing inner tube and a degreasing outer tube. The bottom end of the degreasing inner tube is connected to the air outlet conduit, and the top end is connected to the air outlet conduit. A second cavity is formed between the degreasing inner tube and the degreasing outer tube. The second cavity is provided with a second liquid inlet and a second liquid outlet. The Pall ring is fixed to the inner wall of the degreasing inner tube.

7. The degreasing apparatus for a vacuum heat treatment furnace according to claim 6, characterized in that, The bottom end of the degreasing outer tube is provided with a connecting tube, the bottom end of which is connected to the air outlet conduit, and the top end is sealed to the degreasing inner tube and extends into the interior of the degreasing inner tube; the interior of the degreasing inner tube is provided with a connector communicating with the top of the connecting tube, and the connector is provided with at least two air outlets facing different directions.

8. The degreasing apparatus for a vacuum heat treatment furnace according to claim 7, characterized in that, A rod is connected to the top of the connector. The rod extends along the length of the degreasing inner tube and is equipped with a filter plate. The filter plate is perpendicular to the length of the degreasing inner tube and has a number of filter holes evenly distributed on it.

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