A vacuum carburizing furnace for metal product processing

Abstract

This utility model relates to the technical field of vacuum carburizing furnaces, and in particular to a vacuum carburizing furnace for metal product processing, which is equipped with a switchable dual-filtration structure. During filtration and cleaning, the furnace can be switched in a timely manner to avoid affecting its continued operation and improve its practicality. The furnace includes a vacuum carburizing furnace, an outlet pipe, a three-way valve (first), an inlet branch pipe, a filter cylinder, a hinge, a cylinder cover, a filter element, an outlet branch pipe, a two-way valve (second), a heat exchanger, a circulating water pipe, and a return pipe. The interior of the vacuum carburizing furnace is connected to one side of the outlet pipe, and the other side of the outlet pipe is connected to one side of the three-way valve (first). The other two sides of the three-way valve (first) are connected to the input side of a set of filter cylinders via a set of inlet branch pipes. The output sides of the two sets of filter cylinders are connected to both sides of the two-way valve (second) via a set of outlet branch pipes. One side of the top of each filter cylinder is movably connected to one side of the cylinder cover via a hinge. A locking mechanism is provided between the cylinder cover and the filter cylinder. The filter element is detachably installed inside the filter cylinder.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum carburizing furnaces, specifically a vacuum carburizing furnace for processing metal products. Background Technology

[0002] In metal processing, carburizing is a process in which steel parts are heated to the austenitic state and held at that temperature for an extended period in a carbon-rich medium, allowing carbon atoms to penetrate into the surface layer and increasing the carbon content of the steel surface. Vacuum carburizing furnaces are industrial furnaces used for various heat treatment processes on metal workpieces, requiring strict control of furnace temperature and atmosphere composition.

[0003] A vacuum carburizing furnace for metal product processing, as disclosed in patent publication number CN221141834U, generates a large amount of waste gas during operation. This waste gas contains energy. When the waste gas is discharged from the furnace, it is drawn by a gas pump and conducted through a waste gas recovery pipe. It first enters a filter cylinder, where a filter screen removes dust and impurities. Then, it is discharged through an exhaust pipe into a heat exchanger, where it is heated by a circulating water pipe and used for other purposes. The filter screen can be removed by screwing the inner thread cap onto the outer thread ring, allowing for easy cleaning and reuse of the filter screen.

[0004] However, this device is not very practical because it requires an interruption of operation when cleaning is needed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a vacuum carburizing furnace for metal product processing with a switchable dual-filter structure. This allows for timely switching during filtration and cleaning, preventing disruption to the continued operation of the carburizing furnace and improving its practicality.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vacuum carburizing furnace for metal product processing, comprising a vacuum carburizing furnace, and further comprising an outlet pipe, a three-way valve I, an inlet branch pipe, a filter cylinder, a hinge, a cylinder cover, a filter element, an outlet branch pipe, a two-way valve II, a heat exchanger, a circulating water pipe, and a return pipe. The interior of the vacuum carburizing furnace is connected to one side of the outlet pipe, and the other side of the outlet pipe is connected to one side of the three-way valve I. The other two sides of the three-way valve I are respectively connected to the input side of a set of filter cylinders via a set of inlet branch pipes. The output sides of the two sets of filter cylinders are respectively connected to both sides of the two-way valve II via a set of outlet branch pipes. The other side of the three-way valve II is connected to the input side of the heat exchanger via a return pipe. The output end of the heat exchanger is connected to a circulating water pipe. One side of the top of each set of filter cylinders is movably connected to one side of the cylinder cover via a hinge. A locking mechanism is provided between the cylinder cover and the filter cylinder. The filter element is detachably installed inside the filter cylinder.

[0007] Preferably, the locking mechanism includes a locking handle, a moving pin, and a fixed pin bracket. The front side of the outer end of the cylinder cover is rotatably connected to the inner side of the locking handle. The output end of the locking handle is connected to one side of the inner end of the moving pin. The fixed pin bracket is connected to the front side of the top of the filter cylinder.

[0008] Preferably, it also includes a sealing contact ring gasket, wherein the outer ring side of the top end of the filter cartridge is connected to the bottom side of the sealing contact ring gasket.

[0009] Preferably, it also includes a connecting seat and a bracket, the lower front side of the vacuum carburizing furnace is connected to the rear side of the connecting seat, the front top of the connecting seat is connected to the bottom side of the two sets of filter cylinders respectively, and the middle top side of the connecting seat is connected to the bottom side of the return gas pipe via the bracket.

[0010] Preferably, it also includes an observation window, with the outer middle part of each set of filter cylinders connected to the inner side of an observation window.

[0011] Preferably, it also includes an information board, with one side of the outer end of the vacuum carburizing furnace connected to the inner side of the information board.

[0012] Compared with the prior art, this utility model provides a vacuum carburizing furnace for processing metal products, which has the following beneficial effects:

[0013] The filter element is installed inside the filter cylinder, and the cylinder cover is closed at the top of the filter cylinder and locked by the locking mechanism to keep the filter cylinder closed. Three-way valves one and two are adjusted so that both the outlet and return pipes are connected to one set of filter cylinders, while the other set of filter cylinders remains closed. When the vacuum carburizing furnace is running, high-heat waste gas is discharged from the outlet pipe with the assistance of a corresponding air pump. This waste gas is then introduced into the connected filter cylinder and filtered by the filter element inside. The filtered waste gas output from the return pipe enters the heat exchanger for heat exchange, and hot water is discharged through the circulating water pipe for use. When the filter element in this set of filter cylinders needs cleaning, three-way valves one and two can be switched simultaneously to connect to the other set of filter cylinders. This allows the cylinder cover of this set of filter cylinders to be opened by the hinge after the locking mechanism is unlocked, and the filter element can be removed for cleaning. This dual-filtration structure allows for switching during filtration and cleaning, preventing disruption to the carburizing furnace's continued operation and improving practicality. Attached Figure Description

[0014] Figure 1 This is an axial view of the structural schematic diagram of this utility model;

[0015] Figure 2 This utility model Figure 1 A magnified view;

[0016] Figure 3 This utility model Figure 1 Front view;

[0017] Figure 4 This utility model Figure 1 The right view.

[0018] The following are labels in the attached diagram: 1. Vacuum carburizing furnace; 2. Exhaust pipe; 3. Three-way valve one; 4. Inlet manifold; 5. Filter cartridge; 6. Hinge; 7. Cylinder cover; 8. Locking handle; 9. Moving pin; 10. Fixed pin bracket; 11. Filter element; 12. Exhaust manifold; 13. Three-way valve two; 14. Heat exchanger; 15. Circulating water pipe; 16. Sealing contact ring gasket; 17. Connecting seat; 18. Bracket; 19. Observation window; 20. Information board; 21. Return pipe. Detailed Implementation

[0019] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1

[0021] Please see Figure 1-4A vacuum carburizing furnace for metal product processing includes a vacuum carburizing furnace 1, an exhaust pipe 2, a three-way valve 3, an inlet manifold 4, a filter cylinder 5, a hinge 6, a cylinder cover 7, a filter element 11, an exhaust manifold 12, a two-way valve 13, a heat exchanger 14, a circulating water pipe 15, and a return pipe 21. The interior of the vacuum carburizing furnace 1 is connected to one side of the exhaust pipe 2, and the other side of the exhaust pipe 2 is connected to one side of the three-way valve 3. The other two sides of the three-way valve 3 are respectively connected to a set of inlets. Pipe 4 is connected to the input side of a set of filter cylinders 5. The output sides of the two sets of filter cylinders 5 are respectively connected to both sides of a three-way valve 13 via a set of outlet pipes 12. The other side of the three-way valve 13 is connected to the input side of the heat exchanger 14 via a return pipe 21. The output end of the heat exchanger 14 is connected to a circulating water pipe 15. One side of the top of each set of filter cylinders 5 is movably connected to one side of the cylinder cover 7 via a combination hinge 6. A locking mechanism is provided between the cylinder cover 7 and the filter cylinder 5. The filter element 11 is detachably installed inside the filter cylinder 5. When the filter element 11 is installed inside the filter cylinder 5, the cylinder cover 7 closes at the top of the filter cylinder 5 and locks it with the locking mechanism to keep the filter cylinder 5 closed. The three-way valves 1 and 2 are adjusted so that the outlet pipe 2 and the return pipe 21 both enter into one set of filter cylinders 5, while the other set of filter cylinders 5 is closed. When the vacuum carburizing furnace 1 is running, high-heat waste gas is discharged from the outlet pipe 2 with the assistance of a corresponding air pump and introduced into the connected filter cylinders 5. The filtered exhaust gas, after being filtered by the filter element 11 inside the filter cylinder 5, enters the heat exchanger 14 for heat exchange through the return gas pipe 21, and is discharged as hot water through the circulating water pipe 15 for use. When the filter element 11 inside the filter cylinder 5 needs to be cleaned, the three-way valve 13 and the three-way valve 23 can be switched simultaneously to another filter cylinder 5 to conduct heat, thereby opening the cylinder cover 7 of this filter cylinder 5 under the constraint of the hinge 6 after the locking mechanism is unlocked, and the filter element 11 can be taken out for cleaning.

[0022] The locking mechanism includes a locking handle 8, a moving pin 9, and a fixed pin bracket 10. The front side of the outer end of the cylinder cover 7 is rotatably connected to the inner side of the locking handle 8. The output end of the locking handle 8 is connected to one side of the inner end of the moving pin 9. The fixed pin bracket 10 is connected to the front side of the top of the filter cylinder 5. When the cylinder cover 7 is closed, the locking handle 8 can be turned to make the moving pin 9 rotate and insert into the fixed pin bracket 10, thereby closing and fixing the cylinder cover 7 and improving stability.

[0023] It also includes a sealing contact ring gasket 16, with the outer ring side of the top of the filter cartridge 5 connected to the bottom side of the sealing contact ring gasket 16; the sealing contact ring gasket 16 can make a sealing contact after the cartridge cover 7 is closed, to avoid leakage and improve reliability.

[0024] Example 2

[0025] Please see Figure 1-4A vacuum carburizing furnace for metal product processing includes a vacuum carburizing furnace 1, an exhaust pipe 2, a three-way valve 3, an inlet manifold 4, a filter cylinder 5, a hinge 6, a cylinder cover 7, a filter element 11, an exhaust manifold 12, a two-way valve 13, a heat exchanger 14, a circulating water pipe 15, and a return pipe 21. The interior of the vacuum carburizing furnace 1 is connected to one side of the exhaust pipe 2, and the other side of the exhaust pipe 2 is connected to one side of the three-way valve 3. The other two sides of the three-way valve 3 are respectively connected to a set of inlets. Pipe 4 is connected to the input side of a set of filter cylinders 5. The output sides of the two sets of filter cylinders 5 are respectively connected to both sides of a three-way valve 13 via a set of outlet pipes 12. The other side of the three-way valve 13 is connected to the input side of the heat exchanger 14 via a return pipe 21. The output end of the heat exchanger 14 is connected to a circulating water pipe 15. One side of the top of each set of filter cylinders 5 is movably connected to one side of the cylinder cover 7 via a combination hinge 6. A locking mechanism is provided between the cylinder cover 7 and the filter cylinder 5. The filter element 11 is detachably installed inside the filter cylinder 5. When the filter element 11 is installed inside the filter cylinder 5, the cylinder cover 7 closes at the top of the filter cylinder 5 and locks it with the locking mechanism to keep the filter cylinder 5 closed. The three-way valves 1 and 2 are adjusted so that the outlet pipe 2 and the return pipe 21 both enter into one set of filter cylinders 5, while the other set of filter cylinders 5 is closed. When the vacuum carburizing furnace 1 is running, high-heat waste gas is discharged from the outlet pipe 2 with the assistance of a corresponding air pump and introduced into the connected filter cylinders 5. The filtered exhaust gas, after being filtered by the filter element 11 inside the filter cylinder 5, enters the heat exchanger 14 for heat exchange through the return gas pipe 21, and is discharged as hot water through the circulating water pipe 15 for use. When the filter element 11 inside the filter cylinder 5 needs to be cleaned, the three-way valve 13 and the three-way valve 23 can be switched simultaneously to another filter cylinder 5 to conduct heat, thereby opening the cylinder cover 7 of this filter cylinder 5 under the constraint of the hinge 6 after the locking mechanism is unlocked, and the filter element 11 can be taken out for cleaning.

[0026] It also includes a connecting seat 17 and a support 18. The lower front side of the vacuum carburizing furnace 1 is connected to the rear side of the connecting seat 17. The front top of the connecting seat 17 is connected to the bottom side of the two sets of filter cylinders 5 respectively. The middle top side of the connecting seat 17 is connected to the bottom side of the return gas pipe 21 via the support 18. The filter cylinders 5 can be connected via the connecting seat 17 to stabilize their position, and the return gas pipe 21 can be supported via the support 18 to improve stability.

[0027] It also includes observation windows 19, with the outer middle part of each group of filter cylinders 5 connected to the inner side of a group of observation windows 19; observation can be made from the outside to the inside through the observation windows 19, which facilitates the judgment of the situation and improves convenience.

[0028] It also includes an information board 20, with one side of the outer end of the vacuum carburizing furnace 1 connected to the inner side of the information board 20; the information board 20 can display information about the device, making it easier to read and use, and improving convenience.

[0029] The vacuum carburizing furnace 1, three-way valve 1 3, three-way valve 2 13 and heat exchanger 14 are commercially available equipment known to those skilled in the art. We are simply using them here without making any structural or functional improvements, and we will not elaborate further on them here.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum carburizing furnace for metal product processing, comprising a vacuum carburizing furnace (1), characterized by, It also includes an exhaust pipe (2), a three-way valve one (3), an intake manifold (4), a filter cylinder (5), a hinge (6), a cylinder cover (7), a filter element (11), an exhaust manifold (12), a three-way valve two (13), a heat exchanger (14), a circulating water pipe (15), and a return pipe (21). The interior of the vacuum carburizing furnace (1) is connected to one side of the exhaust pipe (2), and the other side of the exhaust pipe (2) is connected to one side of the three-way valve one (3). The other two sides of the three-way valve one (3) are respectively fed into a set of intake manifolds (4) and a set of filter cylinders (5). The two filter cartridges (5) are connected on the side. The output side of each filter cartridge (5) is connected to the two sides of the three-way valve (13) via a set of air outlet pipes (12). The other side of the three-way valve (13) is connected to the input side of the heat exchanger (14) via a return air pipe (21). The output end of the heat exchanger (14) is connected to a circulating water pipe (15). The top side of each filter cartridge (5) is connected to the side of the cover (7) via a combination of hinges (6). A locking mechanism is provided between the cover (7) and the filter cartridge (5). The filter element (11) can be detachably installed inside the filter cartridge (5).

2. The vacuum carburizing furnace for metal product processing according to claim 1, characterized in that: The locking mechanism includes a locking handle (8), a moving pin (9), and a fixed pin frame (10). The front side of the outer end of the cylinder cover (7) is rotatably connected to the inner side of the locking handle (8). The output end of the locking handle (8) is connected to one side of the inner end of the moving pin (9). The fixed pin frame (10) is connected to the front side of the top of the filter cylinder (5).

3. The vacuum carburizing furnace for metal product processing according to claim 1, characterized in that: It also includes a sealing contact ring gasket (16), the outer ring side of the top of the filter cartridge (5) is connected to the bottom side of the sealing contact ring gasket (16).

4. The vacuum carburizing furnace for metal product processing according to claim 1, characterized in that: It also includes a connecting seat (17) and a bracket (18). The lower front side of the vacuum carburizing furnace (1) is connected to the rear side of the connecting seat (17). The front top of the connecting seat (17) is connected to the bottom side of the two sets of filter cylinders (5) respectively. The middle top side of the connecting seat (17) is connected to the bottom side of the return gas pipe (21) via the bracket (18).

5. The vacuum carburizing furnace for metal product processing according to claim 1, characterized in that: It also includes an observation window (19), with the outer middle part of each set of filter cylinders (5) connected to the inner side of an observation window (19).

6. The vacuum carburizing furnace for metal product processing according to claim 1, characterized in that: It also includes an information board (20), with one side of the outer end of the vacuum carburizing furnace (1) connected to the inner side of the information board (20).

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