Vacuum nitriding furnace waste heat recovery device and using method thereof

Abstract

The invention relates to the technical field of nitriding furnace waste heat recovery, and discloses a vacuum nitriding furnace waste heat recovery device and a using method thereof.The vacuum nitriding furnace waste heat recovery device comprises a pipeline connecting cylinder, a metal connecting inner cylinder is fixedly installed in the pipeline connecting cylinder, and a connecting flange plate is fixedly installed on one side of the pipeline connecting cylinder; and a flange rubber pad is fixedly mounted on one side of the connecting flange plate. The connecting flange plate and the flange rubber pad are movably connected at the bottom of the heat discharge port of the vacuum nitriding furnace, then the threaded grooves in the connecting outer sleeve are in threaded connection at the bottoms of different heat discharge ports of the vacuum nitriding furnace, and then bolts penetrate through positioning holes of the outer sleeve in a threaded mode to be fixedly installed with the connecting flange plate. Afterheat is transmitted by utilizing a pipeline connecting cylinder and an internal metal connecting inner cylinder, and afterheat discharge ports of vacuum nitriding furnaces with different sizes can be connected, so that the diversity of connection and installation of the afterheat discharge ports of the vacuum nitriding furnaces is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery of nitriding furnaces, and specifically relates to a waste heat recovery device for a vacuum nitriding furnace and a using method thereof. Background Art

[0002] A vacuum nitriding furnace is an industrial device for material surface modification. It introduces nitrogen in a vacuum environment to form a hard nitriding layer on the surface of a workpiece. This treatment process is called vacuum nitriding or vacuum ion nitriding, which is a common heat treatment process. When using a vacuum nitriding furnace, it is necessary to recover and reuse the waste heat generated by the vacuum nitriding furnace. For this purpose, a waste heat recovery device for a vacuum nitriding furnace and a using method thereof are proposed. However, in the process of implementing the present invention, the inventor found that at least the following problems in the prior art have not been solved: 1. It is inconvenient to connect the waste heat discharge ports of vacuum nitriding furnaces of different sizes, and the connection and installation method of the waste heat discharge ports of vacuum nitriding furnaces is single, thus reducing the diversity of the connection and installation of the waste heat discharge ports of vacuum nitriding furnaces; 2. It is inconvenient to safely transmit the waste heat of the vacuum nitriding furnace. When transmitting the waste heat, high temperature water vapor erosion will occur in the transmission pipeline due to excessive heat, thus reducing the safety of the waste heat recovery of the vacuum nitriding furnace; 3. It is inconvenient to efficiently recover and pump in the waste heat of the vacuum nitriding furnace, thus reducing the efficiency of the waste heat recovery of the vacuum nitriding furnace. For this reason, the present invention designs a waste heat recovery device for a vacuum nitriding furnace and a using method thereof. Summary of the Invention

[0003] The purpose of the present invention is to solve the disadvantages existing in the prior art, such as: it is inconvenient to connect the waste heat discharge ports of vacuum nitriding furnaces of different sizes, the connection and installation method of the waste heat discharge ports of vacuum nitriding furnaces is single, thus reducing the diversity of the connection and installation of the waste heat discharge ports of vacuum nitriding furnaces, and it is also inconvenient to safely transmit the waste heat of the vacuum nitriding furnace. When transmitting the waste heat, high temperature water vapor erosion will occur in the transmission pipeline due to excessive heat, thus reducing the safety of the waste heat recovery of the vacuum nitriding furnace, and it is also inconvenient to efficiently recover and pump in the waste heat of the vacuum nitriding furnace, thus reducing the efficiency of the waste heat recovery of the vacuum nitriding furnace. For this reason, the present invention designs a waste heat recovery device for a vacuum nitriding furnace and a using method thereof.

[0004] In order to achieve the above purpose, the present invention adopts the following technical scheme: A waste heat recovery device for a vacuum nitriding furnace, including a pipeline connection cylinder, a metal connection inner cylinder is fixedly installed inside the pipeline connection cylinder, a connection flange is fixedly installed on one side of the pipeline connection cylinder, a flange rubber pad is fixedly installed on one side of the connection flange, a connection outer sleeve is movably installed outside the connection flange, outer sleeve positioning holes are all arranged through the other side of the connection outer sleeve, and a thread groove is arranged around the inside of the connection outer sleeve;

[0005] On the other side of the pipeline connection cylinder, a waste heat transfer outer armored pipeline is fixedly installed. Inside the waste heat transfer outer armored pipeline, a waste heat transfer outer pipeline is fixedly installed. Inside the waste heat transfer outer pipeline, a waste heat transfer middle pipeline is fixedly installed. Inside the waste heat transfer middle pipeline, a waste heat transfer inner pipeline is fixedly installed;

[0006] On the other side of the waste heat transfer outer armored pipeline, a heat extraction outer pipeline is fixedly installed. Inside the heat extraction outer pipeline, a heat extraction middle pipeline is fixedly installed. Inside the heat extraction middle pipeline, a heat extraction inner pipeline is fixedly installed. Inside the heat extraction inner pipeline, heat extraction fans are fixedly installed.

[0007] Preferably, on the other side of the heat extraction outer pipeline, a heat conduction outer pipeline is fixedly installed. Inside the heat conduction outer pipeline, a heat conduction middle pipeline is fixedly installed. Inside the heat conduction middle pipeline, a heat conduction inner pipeline is fixedly installed. Inside the heat conduction inner pipeline, a heat conduction fan is fixedly installed.

[0008] Preferably, at the bottom of the heat conduction outer pipeline, a filtering outer pipeline is fixedly installed. Inside the filtering outer pipeline, a filtering middle pipeline is fixedly installed. Inside the filtering middle pipeline, a filtering inner pipeline is fixedly installed. On the other side of the filtering outer pipeline, a filtering replacement notch is penetrated and arranged.

[0009] Preferably, inside the filtering inner pipeline, a filter mesh frame is fixedly installed. Inside the filter mesh frame, a stainless steel mesh is movably installed. At the bottom of the stainless steel mesh, an activated carbon block is movably installed. At the bottom of the activated carbon block, a filter wire mesh block is movably installed. At the bottom of the filter wire mesh block, a filter sponge is movably installed. At the bottom of the filter sponge, a filter cotton block is movably installed.

[0010] Preferably, on the other side of the filter mesh frame, a filtering positioning plate is movably installed. Inside the filtering positioning plate, filter plate installation screws are threadedly installed. On one side of the filtering positioning plate, a positioning cotton block is fixedly installed.

[0011] Preferably, at the bottom of the filtering outer pipeline, a recycling box is penetrated and installed. Inside the recycling box, a recycling inner layer is fixedly installed. On the top of the recycling box, a water supply box is fixedly installed. Inside the water supply box, a water supply pump is fixedly installed. The water pumping end of the water supply pump is penetrated and installed with a water guiding pipeline. The water drainage end of the water supply pump is penetrated and installed with a drainage pipeline.

[0012] Preferably, inside the recycling inner layer, a heat transfer installation frame is fixedly installed. Inside the heat transfer installation frame, a heat transfer pipeline is fixedly installed.

[0013] Preferably, on one side of the recycling box, a support side plate is fixedly installed. On one side of the support side plate, a support frame is fixedly installed. On the top of the support frame, a support groove is penetrated and arranged. At the bottom of the recycling box, a placement frame is fixedly installed.

[0014] Preferably, a push-pull handle is fixedly installed on the other side of the placement frame, universal wheels are fixedly installed at the bottom of the placement frame, a storage box is fixedly installed on the top of the placement frame, and a storage protection layer is fixedly installed inside the storage box.

[0015] A method for using a waste heat recovery device of a vacuum nitriding furnace includes the following steps:

[0016] S1. Actively connect through a connecting flange and a flange rubber pad at the bottom of the heat discharge port of the vacuum nitriding furnace. Then, threadedly connect using the threaded groove inside the connecting outer sleeve at the bottom of different heat discharge ports of the vacuum nitriding furnace. Then, thread bolts through the outer sleeve positioning holes and the connecting flange for fixed installation. Then, use a pipeline connecting cylinder and the metal connecting inner cylinder inside to transfer the waste heat. Then, use the waste heat transfer inner pipeline to transfer the waste heat discharged from the vacuum nitriding furnace. Then, use the waste heat transfer middle pipeline and the waste heat transfer outer pipeline to protect the waste heat. Then, use the waste heat transfer outer armored pipeline to protect the pipeline against high temperature. Then, connect the heat extraction inner pipeline and the waste heat transfer inner pipeline to introduce the waste heat. Then, use multiple exhaust fans to draw the waste heat into the equipment. Then, use the heat extraction middle pipeline and the heat extraction inner pipeline to protect the heat extraction inner pipeline;

[0017] S2. Transfer the drawn waste heat through the heat conduction inner pipeline. Then, use the heat conduction middle pipeline and the heat conduction outer pipeline to insulate and protect the heat conduction inner pipeline. Then, use a heat conduction fan to draw the waste heat in again. Then, filter the waste heat through the filter inner pipeline. Then, use the filter middle pipeline and the filter outer pipeline to insulate and protect the filter inner pipeline. Then, use the filter replacement notch to install and use the filter positioning plate. Then, initially filter the waste heat using the stainless steel mesh and activated carbon blocks inside the filter mesh frame. Then, secondarily filter the waste heat using the filter wire mesh block and the filter sponge. Then, finally filter the waste heat using the filter cotton block. Then, thread the filter plate installation screws through the filter positioning plate and stably install them on the other side of the filter outer pipeline. Then, use the positioning cotton block to position the filter components;

[0018] S3. Stably install the internal recovery components through the recovery inner layer inside the recovery box. Then, connect the water pumping end of the water supply pump through the installed water guiding pipeline and the cold water water pipe. Then, connect the water pumping end through the installed water guiding pipeline and the water inlet end of the heat transfer pipeline. Then, use the heat transfer installation frame to stably install the heat transfer pipeline. Then, use the waste heat transmitted inside the recovery inner layer to process the waste heat of the heat transfer pipeline. Then, use the support groove inside the support frame to stably support the waste heat transfer outer armored pipeline. Then, use the placement frame to support the equipment. Then, use the push-pull handle and the universal wheels to move the equipment. Then, use the storage box and the storage protection layer to actively store the parts.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. In the present invention, the connecting flange and the flange rubber pad are movably connected to the bottom of the heat discharge port of the vacuum nitriding furnace. Then, the threaded groove inside the connecting outer sleeve is threadedly connected to the bottom of different heat discharge ports of the vacuum nitriding furnace. Then, bolts are threaded through the positioning holes of the outer sleeve and the connecting flange for fixed installation. Then, the waste heat is transmitted by the pipeline connecting cylinder and the metal connecting inner cylinder inside, which can connect the waste heat discharge ports of vacuum nitriding furnaces with different sizes, thus improving the diversity of the connection and installation of the waste heat discharge ports of the vacuum nitriding furnace.

[0021] 2. In the present invention, the waste heat discharged from the vacuum nitriding furnace is transmitted through the inner waste heat transmission pipeline. Then, the middle waste heat transmission pipeline and the outer waste heat transmission pipeline are used to protect the waste heat. Then, the outer armored waste heat transmission pipeline is used to protect the pipeline against high temperature, which can safely transmit the waste heat of the vacuum nitriding furnace and prevent the transmission pipeline from being eroded by high-temperature water vapor due to excessive heat during waste heat transmission, thus improving the safety of waste heat recovery of the vacuum nitriding furnace.

[0022] 3. In the present invention, the inner heat extraction pipeline and the inner waste heat transmission pipeline are connected to introduce the waste heat. Then, a plurality of exhaust fans are used to draw the waste heat into the equipment. Then, the middle heat extraction pipeline and the inner heat extraction pipeline are used to protect the inner heat extraction pipeline, which can efficiently recover and draw in the waste heat of the vacuum nitriding furnace, thus improving the efficiency of waste heat recovery of the vacuum nitriding furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall three-dimensional view of a waste heat recovery device for a vacuum nitriding furnace proposed by the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of a waste heat recovery device for a vacuum nitriding furnace proposed by the present invention;

[0025] Figure 3 It is a schematic diagram of a partial structure of the pipeline connecting cylinder of a waste heat recovery device for a vacuum nitriding furnace proposed by the present invention;

[0026] Figure 4 It is a partial three-dimensional view of the outer armored waste heat transmission pipeline of a waste heat recovery device for a vacuum nitriding furnace proposed by the present invention;

[0027] Figure 5 It is a schematic diagram of a partial structure of the outer heat extraction pipeline of a waste heat recovery device for a vacuum nitriding furnace proposed by the present invention;

[0028] Figure 6 It is a schematic diagram of a partial structure of the outer heat conduction pipeline of a waste heat recovery device for a vacuum nitriding furnace proposed by the present invention;

[0029] Figure 7 Partial perspective view of the filter positioning plate of a waste heat recovery device for a vacuum nitriding furnace proposed by the present invention;

[0030] Figure 8 Partial structural schematic diagram of the recovery box of a waste heat recovery device for a vacuum nitriding furnace proposed by the present invention;

[0031] Figure 9 Partial perspective view of the support side plate of a waste heat recovery device for a vacuum nitriding furnace proposed by the present invention;

[0032] Figure 10 Partial perspective view of the placement frame of a waste heat recovery device for a vacuum nitriding furnace proposed by the present invention.

[0033] In the figure: 1. Pipe connection cylinder; 101. Metal connection inner cylinder; 102. Connection flange; 103. Flange rubber pad; 104. Connection outer sleeve; 105. Outer sleeve positioning hole; 106. Thread groove; 2. Waste heat transfer outer armored pipe; 201. Waste heat transfer outer pipe; 202. Waste heat transfer middle pipe; 203. Waste heat transfer inner pipe; 3. Heat extraction outer pipe; 301. Heat extraction middle layer pipe; 302. Heat extraction inner layer pipe; 303. Heat extraction fan; 4. Heat conduction outer pipe; 401. Heat conduction middle layer pipe; 402. Heat conduction inner layer pipe; 403. Heat conduction fan; 5. Filter outer pipe; 501. Filter middle layer pipe; 502. Filter inner layer pipe; 503. Filter replacement notch; 6. Recovery box; 601. Recovery inner layer; 7. Placement frame; 701. Push-pull handle; 702. Universal wheel; 8. Storage box; 801. Storage protective layer; 9. Support side plate; 901. Support frame; 902. Support groove; 10. Filter mesh frame; 1001. Stainless steel mesh; 1002. Activated carbon block; 1003. Filter wire mesh block; 1004. Filter sponge; 1005. Filter cotton block; 11. Filter positioning plate; 1101. Positioning cotton block; 1102. Filter plate mounting screw; 12. Heat transfer mounting frame; 1201. Heat transfer pipe; 13. Water supply tank; 1301. Water supply pump; 1302. Water guide pipe; 1303. Drain pipe. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Such as Figures 1 - 10As shown in the figure, the present invention provides a waste heat recovery device for a vacuum nitriding furnace and its usage method, including a pipeline connection cylinder 1. Inside the pipeline connection cylinder 1, a metal connection inner cylinder 101 is fixedly installed. On one side of the pipeline connection cylinder 1, a connection flange 102 is fixedly installed. On one side of the connection flange 102, a flange rubber pad 103 is fixedly installed. Outside the connection flange 102, a connection outer sleeve 104 is movably installed. On the other side of the connection outer sleeve 104, outer sleeve positioning holes 105 are all provided through. Inside the connection outer sleeve 104, a threaded groove 106 is arranged in a surrounding manner;

[0036] On the other side of the pipeline connection cylinder 1, a waste heat transfer outer armored pipeline 2 is fixedly installed. Inside the waste heat transfer outer armored pipeline 2, a waste heat transfer outer pipeline 201 is fixedly installed. Inside the waste heat transfer outer pipeline 201, a waste heat transfer middle pipeline 202 is fixedly installed. Inside the waste heat transfer middle pipeline 202, a waste heat transfer inner pipeline 203 is fixedly installed;

[0037] On the other side of the waste heat transfer outer armored pipeline 2, a heat extraction outer pipeline 3 is fixedly installed. Inside the heat extraction outer pipeline 3, a heat extraction middle pipeline 301 is fixedly installed. Inside the heat extraction middle pipeline 301, a heat extraction inner pipeline 302 is fixedly installed. Inside the heat extraction inner pipeline 302, heat extraction fans 303 are all fixedly installed.

[0038] When the device works, it is movably connected to the bottom of the heat discharge port of the vacuum nitriding furnace through the connection flange 102 and the flange rubber pad 103. Then, the threaded groove 106 inside the connection outer sleeve 104 is threadedly connected to the bottom of the heat discharge ports of different vacuum nitriding furnaces. Then, bolts are threaded through the outer sleeve positioning holes 105 and the connection flange 102 for fixed installation. Then, the waste heat is transferred by using the pipeline connection cylinder 1 and the internal metal connection inner cylinder 101, and the heat discharge ports of vacuum nitriding furnaces with different sizes can be connected, thus improving the diversity of the connection and installation of the heat discharge ports of the vacuum nitriding furnace.

[0039] The waste heat discharged from the vacuum nitriding furnace is transferred through the waste heat transfer inner pipeline 203. Then, the waste heat is protected by using the waste heat transfer middle pipeline 202 and the waste heat transfer outer pipeline 201. Then, the pipeline is protected against high temperature by using the waste heat transfer outer armored pipeline 2, and the waste heat of the vacuum nitriding furnace can be safely transferred. During the waste heat transfer, the transmission pipeline will not be eroded by high-temperature water vapor due to excessive heat, thus improving the safety of the waste heat recovery of the vacuum nitriding furnace;

[0040] The waste heat is introduced by connecting the heat extraction inner pipe 302 and the waste heat transmission inner pipe 203. Then, multiple exhaust fans 303 are used to draw the waste heat into the device. Subsequently, the heat extraction middle pipe 301 and the heat extraction inner pipe 302 are used to protect the heat extraction inner pipe 302, enabling efficient recovery and extraction of the waste heat from the vacuum nitriding furnace, thereby improving the efficiency of waste heat recovery from the vacuum nitriding furnace. The exhaust fan 303 is electrically connected to an external power supply through a wire;

[0041] Wherein, on the other side of the heat extraction outer pipe 3, a heat conduction outer pipe 4 is fixedly installed. Inside the heat conduction outer pipe 4, a heat conduction middle pipe 401 is fixedly installed. Inside the heat conduction middle pipe 401, a heat conduction inner pipe 402 is fixedly installed. Inside the heat conduction inner pipe 402, a heat conduction fan 403 is fixedly installed;

[0042] It should be noted that when the device is working, the heat conduction inner pipe 402 can be used to transfer the drawn waste heat. Then, the heat conduction middle pipe 401 and the heat conduction outer pipe 4 are used to provide heat insulation protection for the heat conduction inner pipe 402. Subsequently, the heat conduction fan 403 is used to draw the waste heat for a second time, thereby improving the safety of waste heat recovery. The heat conduction fan 403 is electrically connected to an external power supply through a wire;

[0043] Wherein, at the bottom of the heat conduction outer pipe 4, a filtering outer pipe 5 is fixedly installed. Inside the filtering outer pipe 5, a filtering middle pipe 501 is fixedly installed. Inside the filtering middle pipe 501, a filtering inner pipe 502 is fixedly installed. On the other side of the filtering outer pipe 5, a filtering replacement notch 503 is provided through;

[0044] It should be noted that the waste heat is filtered through the filtering inner pipe 502. Then, the filtering middle pipe 501 and the filtering outer pipe 5 are used to provide heat insulation protection for the filtering inner pipe 502. Subsequently, the filtering replacement notch 503 is used to install and use the filtering positioning plate 11, thereby improving the stability of waste heat filtering;

[0045] Wherein, inside the filtering inner pipe 502, a filter mesh frame 10 is fixedly installed. Inside the filter mesh frame 10, a stainless steel mesh 1001 is movably installed. At the bottom of the stainless steel mesh 1001, an activated carbon block 1002 is movably installed. At the bottom of the activated carbon block 1002, a filter wire mesh block 1003 is movably installed. At the bottom of the filter wire mesh block 1003, a filter sponge 1004 is movably installed. At the bottom of the filter sponge 1004, a filter cotton block 1005 is movably installed;

[0046] It should be noted that the stainless steel mesh 1001 and activated carbon blocks 1002 inside the filter mesh frame 10 are used to initially filter the waste heat. Then, the filter wire mesh block 1003 and filter sponge 1004 are used to secondary filter the waste heat. Subsequently, the filter cotton block 1005 is used to finally filter the waste heat, thereby improving the effect of waste heat filtration.

[0047] Wherein, a filter positioning plate 11 is movably installed on the other side of the filter mesh frame 10. Filter plate installation screws 1102 are threadedly installed inside the filter positioning plate 11, and a positioning cotton block 1101 is fixedly installed on one side of the filter positioning plate 11.

[0048] It should be noted that the filter plate installation screws 1102 are threadedly passed through the filter positioning plate 11 and stably installed on the other side of the filter outer pipe 5. Then, the positioning cotton block 1101 is used to position the filter components, thereby improving the stability of the filter components during use.

[0049] Wherein, a recovery box 6 is installed through the bottom of the filter outer pipe 5. A recovery inner layer 601 is fixedly installed inside the recovery box 6, a water supply box 13 is fixedly installed on the top of the recovery box 6, a water supply pump 1301 is fixedly installed inside the water supply box 13, a water guide pipe 1302 is installed through the water pumping end of the water supply pump 1301, and a drainage pipe 1303 is installed through the drainage end of the water supply pump 1301.

[0050] It should be noted that the recovery inner layer 601 inside the recovery box 6 is used to stably install the internal recovery components. Then, the water guide pipe 1302 installed through the water pumping end of the water supply pump 1301 is connected to the cold water pipe, and then the water guide pipe 1302 installed through the water pumping end is connected to the water inlet end of the heat transfer pipe 1201, thereby improving the convenience of heating cold water. The water supply pump 1301 is electrically connected to an external power supply through a wire.

[0051] Wherein, a heat transfer installation frame 12 is fixedly installed inside the recovery inner layer 601, and a heat transfer pipe 1201 is fixedly installed inside the heat transfer installation frame 12.

[0052] It should be noted that the heat transfer pipe 1201 is stably installed by the heat transfer installation frame 12. Then, the waste heat transmitted inside the recovery inner layer 601 is used to process the waste heat of the heat transfer pipe 1201, thereby improving the efficiency of waste heat recovery of the vacuum nitriding furnace.

[0053] Wherein, a support side plate 9 is fixedly installed on one side of the recovery box 6, a support frame 901 is fixedly installed on one side of the support side plate 9, a support groove 902 is provided through the top of the support frame 901, and a placement frame 7 is fixedly installed at the bottom of the recovery box 6.

[0054] It should be noted that the waste heat transfer outer armored pipe 2 is stably supported by the support groove 901 inside the support frame 901, thereby improving the stability of waste heat recovery.

[0055] Wherein, a push-pull handle 701 is fixedly installed on the other side of the placement frame 7, universal wheels 702 are fixedly installed at the bottom of the placement frame 7, a storage box 8 is fixedly installed at the top of the placement frame 7, and a storage protective layer 801 is fixedly installed inside the storage box 8.

[0056] It should be noted that the equipment is supported by the placement frame 7, then the push-pull handle 701 and the universal wheels 702 are used to move the equipment, and then the storage box 8 and the storage protective layer 801 are used to movably store the parts, thereby improving the convenience of use of the recycling device.

[0057] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for a vacuum nitriding furnace, comprising a pipeline connecting tube (1), characterized in that: A metal connecting inner tube (101) is fixedly installed inside the pipeline connecting tube (1), a connecting flange (102) is fixedly installed on one side of the pipeline connecting tube (1), a flange rubber pad (103) is fixedly installed on one side of the connecting flange (102), a connecting outer sleeve (104) is movably installed outside the connecting flange (102), an outer sleeve positioning hole (105) is penetrated through the other side of the connecting outer sleeve (104), and a threaded groove (106) is arranged around the inside of the connecting outer sleeve (104); A waste heat transmission outer armored pipe (2) is fixedly installed on the other side of the pipe connecting tube (1), a waste heat transmission outer armored pipe (2) is fixedly installed inside the waste heat transmission outer armored pipe (2), a waste heat transmission middle pipe (202) is fixedly installed inside the waste heat transmission outer pipe (201), and a waste heat transmission inner pipe (203) is fixedly installed inside the waste heat transmission middle pipe (202); A heat extraction outer pipe (3) is fixedly installed on the other side of the waste heat transmission outer armored pipe (2), a heat extraction middle layer pipe (301) is fixedly installed inside the heat extraction outer pipe (3), a heat extraction inner layer pipe (302) is fixedly installed inside the heat extraction middle layer pipe (301), and an exhaust fan (303) is fixedly installed inside the heat extraction inner layer pipe (302).

2. A vacuum nitriding furnace waste heat recovery device according to claim 1, characterized in that: A heat-conducting outer pipe (4) is fixedly installed on the other side of the heat-extracting outer pipe (3), a heat-conducting middle-layer pipe (401) is fixedly installed inside the heat-conducting outer pipe (4), a heat-conducting inner-layer pipe (402) is fixedly installed inside the heat-conducting middle-layer pipe (401), and a heat-conducting fan (403) is fixedly installed inside the heat-conducting inner-layer pipe (402).

3. A vacuum nitriding furnace waste heat recovery device according to claim 2, characterized in that: A filtering outer pipe (5) is fixedly installed at the bottom of the heat-conducting outer pipe (4), a filtering middle-layer pipe (501) is fixedly installed inside the filtering outer pipe (5), a filtering inner-layer pipe (502) is fixedly installed inside the filtering middle-layer pipe (501), and a filtering replacement slot (503) is provided through the other side of the filtering outer pipe (5).

4. A vacuum nitriding furnace waste heat recovery device according to claim 3, characterized in that: A filter rack (10) is fixedly installed inside the filtering inner layer pipe (502), a stainless steel mesh (1001) is movably installed inside the filter rack (10), an activated carbon block (1002) is movably installed at the bottom of the stainless steel mesh (1001), a filter steel mesh block (1003) is movably installed at the bottom of the activated carbon block (1002), a filter sponge (1004) is movably installed at the bottom of the filter steel mesh block (1003), and a filter cotton block (1005) is movably installed at the bottom of the filter sponge (1004).

5. A vacuum nitriding furnace waste heat recovery device according to claim 4, characterized in that: A filter positioning plate (11) is movably mounted on the other side of the filter mesh frame (10), filter plate mounting screws (1102) are threadedly mounted inside the filter positioning plate (11), and a positioning cotton block (1101) is fixedly mounted on one side of the filter positioning plate (11).

6. A vacuum nitriding furnace waste heat recovery device according to claim 3, characterized in that: A recovery box (6) is installed through the bottom of the filtering outer pipe (5), a recovery inner layer (601) is fixedly installed inside the recovery box (6), a water supply box (13) is fixedly installed on the top of the recovery box (6), a water supply pump (1301) is fixedly installed inside the water supply box (13), a water guide pipe (1302) is installed through the water pumping end of the water supply pump (1301), and a drainage pipe (1303) is installed through the drainage end of the water supply pump (1301).

7. A vacuum nitriding furnace waste heat recovery device according to claim 6, characterized in that: A heat transfer mounting frame (12) is fixedly installed inside the recycling inner layer (601), and a heat transfer pipe (1201) is fixedly installed inside the heat transfer mounting frame (12).

8. The vacuum nitriding furnace waste heat recovery device according to claim 6, characterized in that: A supporting side plate (9) is fixedly mounted on one side of the recycling box (6), a supporting frame (901) is fixedly mounted on one side of the supporting side plate (9), a supporting groove (902) is provided through the top of the supporting frame (901), and a placing frame (7) is fixedly mounted on the bottom of the recycling box (6).

9. A vacuum nitriding furnace waste heat recovery device according to claim 8, characterized in that: A push-pull handle (701) is fixedly installed on the other side of the placement frame (7), a universal wheel (702) is fixedly installed on the bottom of the placement frame (7), a storage box (8) is fixedly installed on the top of the placement frame (7), and a storage protection layer (801) is fixedly installed inside the storage box (8).

10. A method for using a waste heat recovery device for a vacuum nitriding furnace, based on the waste heat recovery device for a vacuum nitriding furnace according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The flange plate (102) and the flange rubber pad (103) are movably connected at the bottom of the heat exhaust port of the vacuum nitriding furnace, and then the thread groove (106) inside the connecting outer sleeve (104) is used to thread the bottom of different heat exhaust ports of the vacuum nitriding furnace, and then the bolt thread is passed through the outer sleeve positioning hole (105) and the connecting flange plate (102) for fixed installation, and then the waste heat is transmitted by the pipe connecting tube (1) and the internal metal connecting inner tube (101), and then the waste heat transmission inner pipe (203) is used to heat the vacuum nitriding furnace. The waste heat discharged from the furnace is transmitted, and then the waste heat is protected by the waste heat transmission middle pipe (202) and the waste heat transmission outer pipe (201), and then the pipe is protected against high temperature by the waste heat transmission outer armored pipe (2), and then the waste heat is introduced by connecting the heat extraction inner pipe (302) and the waste heat transmission inner pipe (203), and then the waste heat is extracted into the equipment by multiple exhaust fans (303), and then the heat extraction inner pipe (302) is protected by the heat extraction middle pipe (301) and the heat extraction inner pipe (302); S2, the waste heat drawn in is transmitted through the heat-conducting inner layer pipe (402), and then the heat-conducting middle layer pipe (401) and the heat-conducting outer layer pipe (4) are used to insulate the heat-conducting inner layer pipe (402), and then the waste heat is drawn in again using the heat-conducting fan (403), and then the waste heat is filtered using the filtering inner layer pipe (502), and then the filtering inner layer pipe (502) is insulated and protected using the filtering middle layer pipe (501) and the filtering outer layer pipe (5), and then the filtering positioning plate (11) is moved using the filtering replacement slot (503). After installation and use, the residual heat is initially filtered using the stainless steel mesh (1001) and the activated carbon block (1002) inside the filter mesh frame (10), and then the residual heat is secondary filtered using the filter wire mesh block (1003) and the filter sponge (1004), and then the residual heat is finally filtered using the filter cotton block (1005), and then the filter plate installation screw (1102) is threaded through the filter positioning plate (11) and stably installed on the other side of the filter outer pipe (5), and then the positioning cotton block (1101) is used to position the filter component for use; S3, the recycling components inside the recycling box (6) are stably installed through the recycling inner layer (601), and then the water supply pump (1301) is used to connect the water pipe (1302) installed through the water pump end and the cold water pipe, and then the water pipe (1302) installed through the water pump end and the water inlet end of the heat transfer pipe (1201) are connected, and then the heat transfer installation frame (12) is used to stably install the heat transfer pipe (1201), and then the waste heat transmitted inside the recycling inner layer (601) is used to perform waste heat processing on the heat transfer pipe (1201), and then the support groove (902) inside the support frame (901) is used to stably support the waste heat transmission outer armored pipe (2), and then the placement frame (7) is used to support the equipment, and then the push-pull handle (701) is used in conjunction with the universal wheel (702) to move the equipment for use, and then the storage box (8) and the storage protection layer (801) are used to movably store the parts.

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