Efficient nitriding furnace

Abstract

The utility model relates to the technical field of nitriding furnaces, in particular to an efficient nitriding furnace which comprises an inner tank body, a top cover is detachably arranged at the top end of the inner tank body, a discharge port is formed in the top cover, a tubular filter is arranged at the end, away from the top cover, of the discharge port, and the tubular filter comprises a first shell, a second shell, a filter screen and a filter screen cylinder. The first shell is in threaded connection with the second shell, a limiting step is arranged at the joint of the first shell and the second shell, a first annular covered edge and a second annular covered edge are arranged in the limiting step, the filter screen is arranged in the first annular covered edge, and the filter screen cylinder is arranged in the second annular covered edge. A purification shell is arranged at one end, far away from the discharge port, of the tubular filter, clamping plates are symmetrically arranged in the purification shell, through holes are uniformly formed in the clamping plates, an activated carbon plate is arranged between the two clamping plates, and a switch door is hinged to the front end face of the purification shell. The waste gas purification device can filter and purify waste gas, and is more efficient in work and better in practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile nitriding furnaces, in particular to a high-efficiency nitriding furnace. Background Art

[0002] In order to increase the wear resistance of the existing molds, measuring tools, cutting tools, etc., they are all nitrided in the manufacturing process. The nitriding furnace has the characteristics of low processing temperature, short time, and small deformation of the workpiece. Properties: high fatigue limit and good wear resistance. The nitriding furnace will produce a large amount of exhaust gas during manufacturing, and the exhaust gas will be purified. The Chinese patent document "202221561483.9" uses a filter screen and a filter element set in the purification cylinder for purification. This structure is complicated to operate and difficult to maintain during the later maintenance and cleaning. The maintenance efficiency is low, and it is impossible to thoroughly clean the inner wall of the purification cylinder. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-efficiency nitriding furnace for the above-mentioned defects, which can filter and purify the exhaust gas, and the maintenance work is more efficient and more practical.

[0004] The utility model adopts the following technical solution to solve its technical problems: a high-efficiency nitriding furnace, comprising an inner tank body, a top cover detachably provided at the top of the inner tank body, a discharge port provided on the top cover, a tubular filter provided at one end of the discharge port away from the top cover, the tubular filter comprising a first shell, a second shell, a filter screen, and a filter screen cylinder, the first shell being threadedly connected to the second shell, a limiting step being provided at the connection between the first shell and the second shell, a first annular edging and a second annular edging being provided inside the limiting step, one side of the first annular edging being in conflict with the inner side wall of the first shell, the other side being in conflict with the second annular edging, the other side of the second annular edging being in conflict with the inner side wall of the second shell, the filter screen being provided inside the first annular edging, the filter screen cylinder being provided inside the second annular edging, a purification shell being provided at one end of the tubular filter away from the discharge port, a clamping plate being symmetrically provided inside the purification shell, through holes being evenly provided on the clamping plate, an activated carbon plate being provided between the two clamping plates, and a switch door being hinged on the front end surface of the purification shell.

[0005] Furthermore, the inner wall of the first shell is provided with an internal thread, and the outer surface of the second shell is provided with an external thread.

[0006] Furthermore, the filtering accuracy of the filter screen cylinder is higher than that of the filter screen, and a spacing space is left between the outer surface of the filter screen cylinder and the inner wall of the second shell.

[0007] Furthermore, a fan blade is arranged at the center of the bottom end of the top cover, a motor is arranged at the top end of the top cover, and a driving end of the motor is connected to the fan blade.

[0008] Furthermore, a plurality of air outlet pipes are arranged at intervals from top to bottom inside the inner tank body, an air supply pipe connected to the plurality of air outlet pipes is arranged on the inner wall of one side of the inner tank body, and an air inlet pipe connected to the air supply pipe is arranged on the outer side of the inner tank body.

[0009] Furthermore, a furnace shell is arranged outside the inner tank body, and the inner tank body is arranged inside the furnace shell.

[0010] Furthermore, a hydraulic rod is provided on one side of the furnace shell, a vertical arm is provided at the driving end of the hydraulic rod, a horizontal arm is provided above the top cover, the top end of the vertical arm is connected to the bottom end of the horizontal arm, and the bottom end of the horizontal arm is connected to the top cover through a connecting column.

[0011] The beneficial effects of the utility model are:

[0012] The utility model adopts the coordinated arrangement of a tubular filter, a purification shell, a splint, a through hole, an activated carbon plate, and a switch door. The exhaust gas enters the tubular filter through the discharge port for filtration, and then enters the purification shell, passes through the through holes on the splint, and is adsorbed and purified by the activated carbon plate. The tubular filter is composed of a first shell, a second shell, a filter screen, a filter screen cylinder, and a limiting step. The filter screen and the filter screen cylinder are directly fixed at the connection between the first shell and the second shell when the first shell and the second shell form a threaded connection through the limiting step. The disassembly and installation are convenient. The first shell, the second shell, the filter screen, and the filter screen cylinder can be comprehensively cleaned and maintained for later maintenance. The maintenance is simpler and more efficient. The filter screen cylinder and the filter screen cooperate with each other to achieve double-layer filtration and better filtering effect. The activated carbon plate can be drawn out from between the two splints through the switch plate, and the later replacement and maintenance operations are simpler and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The foregoing and other objects, features and advantages of the present invention will become apparent from the following detailed description in conjunction with the accompanying drawings.

[0014] Figure 1 This is a cross-sectional view of the inner tank body of the utility model.

[0015] Figure 2 It is a front cross-sectional view of the utility model.

[0016] Figure 3 This is a front view of the tubular filter and purification shell of the utility model.

[0017] Figure 4 This is a cross-sectional view of the tubular filter and purification shell of the utility model.

[0018] Among them: 1. inner tank body; 2. top cover; 3. discharge port; 4. tubular filter; 401. first shell; 402. second shell; 403. filter screen; 404. filter screen cylinder; 405. limiting step; 406. first annular edging; 407. second annular edging; 5. purification shell; 501. splint; 502. through hole; 503. activated carbon plate; 504. switch door; 6. fan blades; 7. motor; 801. exhaust pipe; 802. air supply pipe; 803. air inlet pipe; 9. furnace shell; 10. hydraulic rod; 11. vertical arm; 12. horizontal arm; 13. connecting column. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] Reference Figure 1-4 As shown, a high-efficiency nitriding furnace comprises an inner tank body 1, a top cover 2 is detachably provided on the top of the inner tank body 1, a discharge port 3 is provided on the top cover 2, the discharge port 3 is used to discharge exhaust gas, a tubular filter 4 is provided at one end of the discharge port 3 away from the top cover 2, the tubular filter 4 comprises a first shell 401, a second shell 402, a filter screen 403, and a filter screen cylinder 404, the first shell 401 is threadedly connected with the second shell 402, an inner thread is provided on the inner wall of the first shell 401, an outer thread is provided on the outer surface of the second shell 402, a limiting step 405 is provided at the connection between the first shell 401 and the second shell 402, a first annular edging 406 and a second annular edging 407 are provided inside the limiting step 405, one side of the first annular edging 406 conflicts with the inner side wall of the first shell 401, and the other side conflicts with the second annular edging 407, and the other side of the second annular edging 407 conflicts with the inner side wall of the second shell 402 The walls conflict with each other, the filter screen 403 is arranged inside the first annular edging 406, and the filter screen cylinder 404 is arranged inside the second annular edging 407. The filter screen 403 and the filter screen cylinder 404 are closely fitted with the inner wall of the first shell 401 through the arrangement of the first annular edging 406 and the second annular edging 407, so that the filtering effect is better. When the first shell 401 is threadedly connected with the second shell 402, a pressing force can be applied to the first annular edging 406 and the second annular edging 407 to fix them at the connection between the first shell 401 and the second shell 402. When the first shell 401 and the second shell 402 are disassembled, the filter screen 403 and the filter screen cylinder 404 can be quickly disassembled, and the disassembly and installation are convenient. In the later maintenance, the first shell, the second shell, the filter screen and the filter screen cylinder can be comprehensively cleaned and maintained, and the maintenance work is simpler and more efficient.

[0021] The filtering accuracy of the filter cylinder 404 is higher than that of the filter cylinder 403. The dust and foreign matter generated in the double-layer filtration exhaust gas have a better filtering effect. There is a spacing space between the outer surface of the filter cylinder 404 and the inner wall of the second shell 402. The filter cylinder 404 has a cylindrical structure, and the exhaust gas can be filtered from the outer surface of the filter cylinder 404. The filtering area is larger, which effectively prevents blockage, and the filtered exhaust gas can flow from the spacing space to the rear of the filter cylinder 404, making the filtering more efficient.

[0022] A purification shell 5 is provided at one end of the tubular filter 4 away from the discharge port 3, and a splint 501 is symmetrically provided inside the purification shell 5. Through holes 502 are evenly opened on the splint 501, and an activated carbon plate 503 is provided between the two splints 501. A switch door 504 is hinged on the front end surface of the purification shell 5. Specifically, four splints 501 are provided, which are symmetrically arranged in pairs inside the purification shell 5, and an activated carbon plate 503 is provided between the two groups of splints 501. The activated carbon plate 503 is provided with holes of a honeycomb structure. The exhaust gas filtered by the tubular filter 4 enters the purification shell 5, first passes through the through holes 502 of the splint 501 on one side and contacts with the activated carbon plate 503 for adsorption and purification, and then moves to the splint 501 and the activated carbon plate 503 on the other side for adsorption and purification to purify the exhaust gas. After the switch door 504 is opened, the activated carbon plate 503 can be directly pulled out and replaced from between the two splints 501, which is convenient for later maintenance, simple operation, and higher maintenance efficiency.

[0023] Preferably, a fan blade 6 is provided at the center of the bottom end of the top cover 2, and a motor 7 is provided at the top end of the top cover 2. The driving end of the motor 7 is connected to the fan blade 6. The motor 7 drives the fan blade 6 to rotate, so that the internal gas forms a flow, so that the heating and nitriding effects are better.

[0024] Preferably, a plurality of air outlet pipes 801 are arranged at intervals from top to bottom inside the inner tank body 1, an air supply pipe 802 connected to the plurality of air outlet pipes 801 is provided on the inner wall of one side of the inner tank body 1, an air inlet pipe 803 connected to the air supply pipe 802 is provided on the outside of the inner tank body 1, the air inlet pipe 803 is connected to an external air supply device, nitrogen or the like is transported to the inside of the air supply pipe 802 through the air inlet pipe 803, and the gas is delivered to the inside of the inner tank body 1 along the plurality of air outlet pipes 801.

[0025] Preferably, a furnace shell 9 is provided on the outside of the inner tank body 1, and the inner tank body 1 is arranged inside the furnace shell 9. A hydraulic rod 10 is provided on one side of the furnace shell 9, and a vertical arm 11 is provided at the driving end of the hydraulic rod 10. A horizontal arm 12 is provided above the top cover 2, and the top end of the vertical arm 11 is connected to the bottom end of the horizontal arm 12, and the bottom end of the horizontal arm 12 is connected to the top cover 2 through a connecting column 13. The hydraulic rod 10 drives the vertical arm 11 and the horizontal arm 12 to form an up and down reciprocating movement. Since the horizontal arm 12 is connected to the top cover 2 through the connecting column 13, the top cover 12 is driven to reciprocate up and down, approaching or moving away from the opening at the top of the inner tank body 1, so that the inner tank body 1 is in an open or closed state, and the horizontal arm 12 is arranged at an interval from the motor 7.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-efficiency nitriding furnace, comprising an inner tank body (1), a top cover (2) being detachably provided at the top of the inner tank body (1), a discharge port (3) being provided on the top cover (2), characterized in that: A tubular filter (4) is arranged at one end of the discharge port (3) away from the top cover (2), and the tubular filter (4) comprises a first shell (401), a second shell (402), a filter screen (403), and a filter screen cylinder (404); the first shell (401) and the second shell (402) are threadedly connected; a limiting step (405) is provided at the connection between the first shell (401) and the second shell (402); a first annular edging (406) and a second annular edging (407) are arranged inside the limiting step (405); one side of the first annular edging (406) contacts the inner side wall of the first shell (401), and the other side contacts the inner side wall of the second annular edging (407). The second annular edging (407) is in conflict with the inner wall of the second shell (402), the other side of the second annular edging (407) is in conflict with the inner wall of the second shell (402), the filter screen (403) is arranged inside the first annular edging (406), the filter screen cylinder (404) is arranged inside the second annular edging (407), a purification shell (5) is arranged at one end of the tubular filter (4) away from the discharge port (3), a clamping plate (501) is symmetrically arranged inside the purification shell (5), through holes (502) are evenly opened on the clamping plate (501), an activated carbon plate (503) is arranged between the two clamping plates (501), and a switch door (504) is hinged on the front end surface of the purification shell (5).

2. The high-efficiency nitriding furnace according to claim 1, characterized in that: The inner wall of the first shell (401) is provided with an internal thread, and the outer surface of the second shell (402) is provided with an external thread.

3. The high-efficiency nitriding furnace according to claim 1, characterized in that: The filtering accuracy of the filter screen cylinder (404) is higher than that of the filter screen (403), and a spacing space is left between the outer surface of the filter screen cylinder (404) and the inner wall of the second shell (402).

4. The high-efficiency nitriding furnace according to claim 1, characterized in that: A fan blade (6) is arranged at the center of the bottom end of the top cover (2), and a motor (7) is arranged at the top end of the top cover (2), and a driving end of the motor (7) is connected to the fan blade (6).

5. The high-efficiency nitriding furnace according to claim 1, characterized in that: A plurality of air outlet pipes (801) are arranged at intervals from top to bottom inside the inner tank body (1); an air supply pipe (802) connected to the plurality of air outlet pipes (801) is arranged on the inner wall of one side of the inner tank body (1); and an air inlet pipe (803) connected to the air supply pipe (802) is arranged on the outer side of the inner tank body (1).

6. The high-efficiency nitriding furnace according to claim 1, characterized in that: A furnace shell (9) is arranged outside the inner tank body (1), and the inner tank body (1) is arranged inside the furnace shell (9).

7. The high-efficiency nitriding furnace according to claim 1, characterized in that: A hydraulic rod (10) is provided on one side of the furnace shell (9), a vertical arm (11) is provided at the driving end of the hydraulic rod (10), a horizontal arm (12) is provided above the top cover (2), the top end of the vertical arm (11) is connected to the bottom end of the horizontal arm (12), and the bottom end of the horizontal arm (12) is connected to the top cover (2) via a connecting column (13).

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