A vacuum furnace cooling air volume circulation dynamic adjustment mechanism

Abstract

The invention discloses a vacuum furnace cooling air volume circulation dynamic adjustment mechanism, which relates to the technical field of vacuum furnaces and comprises: a connecting pipe side end is fixedly connected to the vacuum furnace, an end of the connecting pipe away from the vacuum furnace is fixedly connected to a truncated cone-shaped connecting bucket, the connecting bucket side end is fixedly connected to an adjusting cylinder, an end of the adjusting cylinder close to the connecting bucket is axially and equidistantly provided with a plurality of air inlets, an adjusting seat is arranged in the adjusting cylinder and is truncated cone-shaped, the cross-sectional shape of the adjusting seat is the same as that of the connecting bucket, a collecting ring is fixedly connected to the outer wall of the collecting ring, and a plurality of ventilation pipes are arranged between the collecting ring and the fan; cooling air flows from the space between the connecting bucket and the adjusting seat, and the cooling air enters the vacuum furnace through the connecting pipe, the adjusting seat can move in the connecting bucket, and the adjusting seat can change the spacing between the adjusting seat and the connecting bucket by moving, so as to adjust the cross-sectional area of ​​the cooling air passing through the connecting bucket and the adjusting seat.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum furnaces, and in particular to a vacuum furnace cooling air volume circulation dynamic adjustment mechanism. Background Art

[0002] A vacuum furnace is an industrial furnace that performs heat treatment in a vacuum environment. It extracts the gas in the furnace chamber through a vacuum pump system and reduces the internal pressure to a level far below atmospheric pressure, thereby achieving a vacuum state. Materials can undergo various processes such as heat treatment, sintering, annealing, and smelting in the vacuum furnace. During these processes, the materials are not easily affected by oxygen and other gases.

[0003] In the prior art, vacuum furnaces are often cooled by air cooling, and the cooling air volume is often controlled by a dynamic adjustment mechanism. The dynamic adjustment mechanism is mainly composed of a fan, a temperature sensor and a control unit. The temperature sensor detects the real-time temperature in the vacuum furnace and transmits the signal to the control unit. The control unit controls the fan to achieve the effect of dynamically adjusting the cooling air volume.

[0004] However, when the dynamic adjustment mechanism is installed on the vacuum furnace, the cross-sectional area of ​​the fan's air duct cannot be adjusted, the air duct cross-section is designed to be too large, and the cooling air volume is too high. Once the fan power is insufficient, the fan will be overloaded for a long time, causing the fan temperature to rise beyond the limit and the fan will easily burn out. If the air duct cross-section is designed to be too small and the cooling air volume is too small, the fan output power cannot be fully utilized, and the power factor and efficiency are not high. Summary of the invention

[0005] The object of the present invention is to provide a vacuum furnace cooling air volume circulation dynamic adjustment mechanism to solve the technical problem in the prior art that the air duct cross-sectional area of ​​the fan cannot be adjusted, resulting in the fan being unable to fully perform dynamic adjustment of the cooling air volume.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0007] A vacuum furnace cooling air volume circulation dynamic adjustment mechanism, comprising:

[0008] A connecting pipe, wherein a side end of the connecting pipe is fixedly connected to a vacuum furnace, an end of the connecting pipe away from the vacuum furnace is fixedly connected to a truncated cone-shaped connecting bucket, a side end of the connecting bucket is fixedly connected to an adjusting cylinder, and an end of the adjusting cylinder close to the connecting bucket is axially provided with a plurality of air inlets equidistantly arranged therein;

[0009] An adjustment seat, which is arranged in the adjustment cylinder and is in a truncated cone shape, and the cross-sectional shape of the adjustment seat is the same as the cross-sectional shape of the connecting bucket;

[0010] A collecting ring is fixedly connected to the outer wall of the regulating cylinder. A plurality of ventilation pipes are arranged between the collecting ring and the fan. Two ends of the ventilation pipes are respectively fixedly connected to the collecting ring and the fan.

[0011] As a further solution of the present invention: a collecting groove is provided inside the collecting ring, a plurality of air outlets are axially provided at the side end of the collecting ring, the air outlets are communicated with the ventilation pipes, and the collecting groove is communicated with the air inlet.

[0012] As a further solution of the present invention: a filter screen is fixedly connected to the inner wall of the ventilation pipe.

[0013] As a further solution of the present invention: a plurality of wind speed sensors are fixedly connected to the inner wall of the connecting pipe at equal axial distances, and a side hole is opened at the side end of the vacuum furnace, and the side hole is communicated with the inside of the wind speed sensor.

[0014] As a further solution of the present invention: a sealing plate is fixedly connected to the side end of the adjustment seat, and the sealing plate is slidably connected to the inner wall of the adjustment cylinder. A telescopic rod is fixedly connected to the side end of the sealing plate, and a hydraulic cylinder is fixedly connected to the side end of the telescopic rod. An installation groove is opened at the side end of the fan, and the inner wall of the installation groove is fixedly connected to the telescopic rod.

[0015] As a further solution of the present invention: limiting holes are respectively formed at both ends of the blocking plate through the inside of the adjusting seat, the two groups of limiting holes are symmetrical about the axis of the telescopic rod, limiting components are provided in the limiting holes, and the side ends of the limiting components are fixedly connected to the fan.

[0016] As a further solution of the present invention: the limit assembly includes: a limit column, a positioning rod, a positioning tube and a spring, the limit column is abutted against the inner wall of the limit hole, the limit column is fixedly connected to the side end of the positioning rod, the limit column and the positioning tube have equal diameters, the positioning rod is slidably connected to the inner wall of the positioning tube, the positioning tube is slidably connected to the inner wall of the limit hole, and the spring is arranged inside the positioning tube and its two ends are respectively fixedly connected to the positioning rod and the spring.

[0017] As a further solution of the present invention: the outer edge of one end of the positioning tube close to the limiting column is provided with a rounded corner, the inside of the positioning rod is provided with an oil groove, and both ends of the positioning rod are provided with a plurality of oil holes along the length direction, and the oil groove is respectively connected with the inside of the positioning tube and the oil holes.

[0018] As a further solution of the present invention: the outer wall of the regulating cylinder is sleeved with a cooling ring, a spiral circulation hole is opened inside the cooling ring, the cooling ring is fitted with the outer wall of the ventilation pipe, and a cooler is fixedly connected to the bottom end of the cooling ring.

[0019] Beneficial effects of the present invention:

[0020] 1. When the cooling air enters the connecting bucket from the air inlet, the cooling air flows from the space between the connecting bucket and the adjusting seat, and the cooling air enters the vacuum furnace through the connecting pipe. The adjusting seat can move in the connecting bucket. The adjusting seat can change the distance between the adjusting seat and the connecting bucket by moving, so that the cross-sectional area of ​​the cooling air passing through the connecting bucket and the adjusting seat can be adjusted, and further the cooling air can be circulated and adjusted.

[0021] 2. The distribution of the air inlet can ensure that the cooling air enters the connecting bucket evenly. The shape of the adjusting seat can ensure that when the adjusting seat blocks the cooling air, the adjusting seat is evenly stressed, thereby ensuring the stability of the adjusting seat operation. The shape of the connecting bucket realizes the function of collecting and guiding the cooling air, ensuring the sufficiency of the cooling air entering the vacuum furnace through the connecting pipe. When the vacuum furnace needs to be cooled by cooling air, the fan runs, and the fan transmits the cooling air to the collecting ring through the ventilation pipe. The collecting ring passes the cooling air into the connecting bucket through the air inlet. The collecting ring realizes the effect of collecting the cooling air transported by several ventilation pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a front view of the overall structure of the present invention;

[0025] Figure 3 It is the AA cross-sectional view of the overall structure of the present invention;

[0026] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at A;

[0027] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at B;

[0028] Figure 6 It is a schematic diagram of the structure of the regulating cylinder of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the adjustment seat of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of the limiting component of the present invention.

[0031] In the figure: 1. vacuum furnace; 2. connecting pipe; 3. connecting bucket; 4. collecting ring; 5. cooling ring; 6. fan; 7. cooler; 8. hydraulic cylinder; 9. telescopic rod; 10. adjusting cylinder; 11. adjusting seat; 12. wind speed sensor; 13. circulation hole; 14. ventilation pipe; 15. air inlet; 16. blocking plate; 17. limiting column; 18. positioning rod; 19. limiting hole; 20. positioning pipe; 21. spring; 22. collecting groove; 23. air outlet; 24. fillet; 25. mounting groove; 26. filter screen; 27. side hole; 28. oil trough; 29. ​​oil hole. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-Figure 8 As shown, a vacuum furnace cooling air volume circulation dynamic adjustment mechanism comprises: a connecting pipe 2, an adjustment seat 11 and a collecting ring 4, the side end of the connecting pipe 2 is fixedly connected to the vacuum furnace 1, the end of the connecting pipe 2 away from the vacuum furnace 1 is fixedly connected to a truncated cone-shaped connecting bucket 3, the side end of the connecting bucket 3 is fixedly connected to an adjustment cylinder 10, and the end of the adjustment cylinder 10 close to the connecting bucket 3 is axially equidistantly provided with a plurality of air inlets 15, the adjustment seat 11 is arranged in the adjustment cylinder 10 and is truncated cone-shaped, the cross-sectional shape of the adjustment seat 11 is the same as the cross-sectional shape of the connecting bucket 3, when the cooling air enters the connecting bucket 3 from the air inlet 15, the cooling air flows from the space between the connecting bucket 3 and the adjustment seat 11, and the cooling air enters the vacuum furnace 1 through the connecting pipe 2, the adjustment seat 11 can move in the connecting bucket 3, and the adjustment seat 11 can change the adjustment by moving. The distance between the joint seat 11 and the connecting bucket 3 can adjust the cross-sectional area of ​​the cooling air passing through the connecting bucket 3 and the adjusting seat 11, and further realize the circulation adjustment of the cooling air. The distribution of the air inlet 15 can ensure that the cooling air enters the connecting bucket 3 evenly. The shape of the adjusting seat 11 can ensure that when the adjusting seat 11 blocks the cooling air, the adjusting seat 11 is evenly stressed, thereby ensuring the stability of the operation of the adjusting seat 11. The shape of the connecting bucket 3 realizes the function of collecting and guiding the cooling air, ensuring the sufficiency of the cooling air entering the vacuum furnace 1 through the connecting pipe 2. It should be noted that the temperature sensor installed in the vacuum furnace 1 can transmit the detection signal to the control unit, and the control unit controls the adjusting seat 11 to move, thereby realizing the real-time adjustment of the distance between the adjusting seat 11 and the connecting bucket 3.

[0034] The collecting ring 4 is fixedly connected to the outer wall of the regulating cylinder 10, and a plurality of ventilation pipes 14 are arranged between the collecting ring 4 and the fan 6. The two ends of the ventilation pipes 14 are fixedly connected to the collecting ring 4 and the fan 6 respectively. When the vacuum furnace 1 needs to be cooled by cooling air, the fan 6 is operated, and the fan 6 transmits the cooling air to the collecting ring 4 through the ventilation pipe 14. The collecting ring 4 passes the cooling air into the connecting bucket 3 through the air inlet 15. The collecting ring 4 achieves the effect of collecting the cooling air transported by the plurality of ventilation pipes 14.

[0035] In some specific implementation schemes, a collecting groove 22 is opened inside the collecting ring 4, and a plurality of air outlets 23 are axially opened on the side end of the collecting ring 4. The air outlets 23 are interconnected with the ventilation pipe 14, and the collecting groove 22 is interconnected with the air inlet 15. When the cooling air flows along the inner wall of the ventilation pipe 14, the cooling air enters the collecting groove 22 through the air outlet 23, and the cooling air is collected in the collecting groove 22, and at the same time enters the connecting bucket 3 through the air inlet 15 respectively. The collecting groove 22 achieves the effect of buffering the cooling air, thereby preventing the cooling air from directly entering the connecting bucket 3 through the ventilation pipe 14 and impacting the adjustment seat 11, so that the connecting bucket 3 can adapt to a larger power fan 6, further improving the maximum limit of adjusting the air volume.

[0036] In some specific implementation schemes, a filter screen 26 is fixedly connected to the inner wall of the ventilation duct 14. When the cooling air flows through the ventilation duct 14, the filter screen 26 further filters the impurities contained in the cooling air to ensure the cleanliness of the cooling air and prevent impurities from entering the vacuum furnace 1 through the cooling air and affecting the normal operation of the vacuum furnace 1.

[0037] In some specific implementation schemes, a plurality of wind speed sensors 12 are fixedly connected to the inner wall of the connecting pipe 2 at equal intervals in the axial direction. A side hole 27 is opened at the side end of the vacuum furnace 1. The side hole 27 is interconnected with the inside of the wind speed sensor 12. When the cooling air is collected through the connecting bucket 3 and then flows in the connecting pipe 2, the wind speed sensor 12 fixed on the inner wall of the connecting pipe 2 detects the wind speed of the cooling air, thereby determining the amount of cooling air entering the vacuum furnace 1 through the connecting pipe 2. The wind speed sensor 12 transmits the detected data to the fan 6, thereby adjusting the operating power of the fan 6.

[0038] In some specific implementation schemes, a sealing plate 16 is fixedly connected to the side end of the adjusting seat 11, and the sealing plate 16 is slidingly connected to the inner wall of the adjusting cylinder 10. A telescopic rod 9 is fixedly connected to the side end of the sealing plate 16, and a hydraulic cylinder 8 is fixedly connected to the side end of the telescopic rod 9. A mounting groove 25 is opened at the side end of the fan 6, and the inner wall of the mounting groove 25 is fixedly connected to the telescopic rod 9. When the adjusting seat 11 needs to be moved and adjusted in the adjusting cylinder 10, the hydraulic cylinder 8 is operated, and the hydraulic cylinder 8 drives the telescopic rod 9 to be extended and retracted. The telescopic rod 9 moves with the sealing plate 16 and the adjusting seat 11. When the vacuum furnace 1 does not need to be cooled, the hydraulic cylinder 8 drives the telescopic rod 9 to move toward the direction of the vacuum furnace 1, so that the adjusting seat 11 and the inner wall of the connecting bucket 3 are against each other. At this time, the sealing plate 16 blocks the air inlet 15, and the sliding connection between the sealing plate 16 and the inner wall of the adjusting cylinder 10 can provide a limiting effect for the adjusting seat 11 to prevent the adjusting seat 11 from tipping over and deviating.

[0039] In some specific implementation schemes, limiting holes 19 are respectively formed at both ends of the sealing plate 16 through the interior of the adjusting seat 11. The two groups of limiting holes 19 are symmetrical about the axial center line of the telescopic rod 9. A limiting component is provided in the limiting hole 19. The side end of the limiting component is fixedly connected to the fan 6. When the adjusting seat 11 moves, the limiting component can limit the adjusting seat 11 by abutting against the inner wall of the limiting hole 19, thereby ensuring the stability of the operation of the adjusting seat 11 and further preventing the adjusting seat 11 from overturning.

[0040] In some specific implementation schemes, the limiting assembly includes: a limiting column 17, a positioning rod 18, a positioning tube 20 and a spring 21. The limiting column 17 is abutted against the inner wall of the limiting hole 19, the limiting column 17 is fixedly connected to the side end of the positioning rod 18, the limiting column 17 and the positioning tube 20 have the same diameter, the positioning rod 18 is slidably connected to the inner wall of the positioning tube 20, the positioning tube 20 is slidably connected to the inner wall of the limiting hole 19, the spring 21 is arranged inside the positioning tube 20 and the two ends are fixedly connected to the positioning rod 18 and the spring 21 respectively, the spring 21 is always in a compressed state, the elastic tension provided by the spring 21 is transmitted to the limiting column 17 through the limiting hole 19, and the limiting column 17 and The inner wall of the limiting hole 19 abuts, and the supporting effect provided by the positioning tube 20 and the fan 6 is transmitted to the limiting column 17 through the inner wall of the positioning tube 20 and the positioning rod 18, thereby ensuring the stability of the adjustment seat 11 structure. When the adjustment seat 11 moves, the adjustment seat 11 compresses the spring 21 by abutting against the limiting column 17. When the adjustment seat 11 and the inner wall of the connecting bucket 3 abut, the elastic tension provided by the spring 21 is transmitted to the limiting column 17 through the positioning rod 18, and then transmitted to the adjustment seat 11 through the abutment between the limiting column 17 and the inner wall of the limiting hole 19, thereby ensuring the stability of the adjustment seat 11 when moving, and the adjustment seat 11 will not rotate.

[0041] In some specific implementation schemes, a rounded corner 24 is provided on the outer edge of one end of the positioning tube 20 close to the limiting column 17, an oil groove 28 is provided inside the positioning rod 18, and a plurality of oil holes 29 are provided at both ends of the positioning rod 18 along the length direction. The oil grooves 28 are respectively communicated with the inside of the positioning tube 20 and the oil holes 29. When the adjusting seat 11 moves and the positioning tube 20 is inserted into the limiting hole 19 for sliding, the rounded corner 24 provided on the positioning tube 20 facilitates the insertion of the positioning tube 20 into the limiting hole 19, thereby preventing the positioning tube 20 from being deformed due to long-term operation, resulting in the positioning tube 20 being unable to be inserted into the limiting hole 19. When the limiting component runs for a long time, the lubricating oil in the limiting component will be consumed. Since the limiting component is arranged in the adjusting seat 11 and the adjusting cylinder 10 The part makes it inconvenient to add lubricating oil to the limit assembly. Therefore, when the limit assembly lacks lubricating oil, an oil passage pipe of the prior art can be installed inside the fan 6, and the transparent pipe is blocked by a valve, wherein the oil passage pipe can be connected with the positioning tube 20, and the lubricating oil is introduced into the positioning tube 20 through the oil passage pipe, and the lubricating oil enters the oil groove 28 opened by the positioning rod 18, and then flows out from the oil hole 29 into the limit hole 19, and the lubricating oil lubricates the spring 21 at the same time, thereby achieving the effect of facilitating the supply of lubricating oil to the limit assembly. Timely addition of lubricating oil can reduce the friction between the limit assembly and the adjustment seat 11, extend the life of the limit assembly, and at the same time avoid the generation of large heat due to large friction, which affects the use effect of the adjustment seat 11.

[0042] In some specific embodiments, a cooling ring 5 is sleeved and connected to the outer wall of the regulating cylinder 10, a spiral circulation hole 13 is opened inside the cooling ring 5, the cooling ring 5 is fitted with the outer wall of the ventilation pipe 14, and a cooler 7 is fixedly connected to the bottom end of the cooling ring 5. The cooling air introduced by the fan 6 is often absorbed from the air outside the vacuum furnace 1. When the fan 6 is in hot weather, the air absorbed by the fan 6 has high heat. In order to ensure that the cooling air can better cool the vacuum furnace 1, when the cooling air is transported through the ventilation pipe 14, the cooler 7 is running. The cooler 7 circulates the coolant in the circulation hole 13, and the coolant absorbs the heat of the cooling air in the ventilation pipe 14, thereby ensuring that the cooling air contains less heat, so that the cooling air introduced into the vacuum furnace 1 can better cool the vacuum furnace 1.

[0043] Several embodiments of the present invention are described in detail above, but the embodiments of the present invention are not limited thereto and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A vacuum furnace cooling air volume circulation dynamic adjustment mechanism, characterized in that: include: A connecting pipe (2), wherein a side end of the connecting pipe (2) is fixedly connected to the vacuum furnace (1), an end of the connecting pipe (2) away from the vacuum furnace (1) is fixedly connected to a connecting bucket (3) in the shape of a truncated cone, a side end of the connecting bucket (3) is fixedly connected to an adjusting cylinder (10), and an end of the adjusting cylinder (10) close to the connecting bucket (3) is provided with a plurality of air inlets (15) equidistantly axially. An adjustment seat (11), the adjustment seat (11) being arranged in the adjustment cylinder (10) and being in the shape of a truncated cone, the cross-sectional shape of the adjustment seat (11) being the same as the cross-sectional shape of the connecting bucket (3); A collecting ring (4), the collecting ring (4) being fixedly connected to the outer wall of the regulating cylinder (10), a plurality of ventilation pipes (14) being arranged between the collecting ring (4) and the fan (6), the two ends of the ventilation pipes (14) being respectively fixedly connected to the collecting ring (4) and the fan (6), a collecting groove (22) being provided inside the collecting ring (4), a plurality of air outlets (23) being axially provided at the side end of the collecting ring (4), the air outlets (23) being communicated with the ventilation pipes (14), and the collecting grooves (22) being communicated with the air inlet (15).

2. A vacuum furnace cooling air volume circulation dynamic adjustment mechanism according to claim 1, characterized in that: A filter screen (26) is fixedly connected to the inner wall of the ventilation pipe (14).

3. A vacuum furnace cooling air volume circulation dynamic adjustment mechanism according to claim 1, characterized in that: A plurality of wind speed sensors (12) are fixedly connected to the inner wall of the connecting pipe (2) at equal intervals in the axial direction, and a side hole (27) is provided at the side end of the vacuum furnace (1), wherein the side hole (27) is communicated with the inside of the wind speed sensor (12).

4. A vacuum furnace cooling air volume circulation dynamic adjustment mechanism according to claim 1, characterized in that: A blocking plate (16) is fixedly connected to a side end of the adjustment seat (11), the blocking plate (16) is slidably connected to the inner wall of the adjustment tube (10), a telescopic rod (9) is fixedly connected to a side end of the blocking plate (16), a hydraulic cylinder (8) is fixedly connected to a side end of the telescopic rod (9), and a mounting groove (25) is provided at a side end of the fan (6), the inner wall of the mounting groove (25) is fixedly connected to the telescopic rod (9).

5. A vacuum furnace cooling air volume circulation dynamic adjustment mechanism according to claim 4, characterized in that: The two ends of the blocking plate (16) are respectively penetrated through the interior of the adjustment seat (11) to form limit holes (19), and the two groups of limit holes (19) are symmetrical about the axis center line of the telescopic rod (9). A limit assembly is provided in the limit hole (19), and the side end of the limit assembly is fixedly connected to the fan (6).

6. A vacuum furnace cooling air volume circulation dynamic adjustment mechanism according to claim 5, characterized in that: The limiting assembly comprises: a limiting column (17), a positioning rod (18), a positioning tube (20) and a spring (21); the limiting column (17) is abutted against the inner wall of the limiting hole (19); the limiting column (17) is fixedly connected to the side end of the positioning rod (18); the limiting column (17) and the positioning tube (20) have the same diameter; the positioning rod (18) is slidably connected to the inner wall of the positioning tube (20); the positioning tube (20) is slidably connected to the inner wall of the limiting hole (19); and the spring (21) is arranged inside the positioning tube (20) and has two ends fixedly connected to the positioning rod (18) and the spring (21) respectively.

7. A vacuum furnace cooling air volume circulation dynamic adjustment mechanism according to claim 6, characterized in that: A rounded corner (24) is provided on the outer edge of one end of the positioning tube (20) close to the limiting column (17); an oil groove (28) is provided inside the positioning rod (18); and a plurality of oil holes (29) are provided at both ends of the positioning rod (18) along the length direction; the oil groove (28) is communicated with the inside of the positioning tube (20) and the oil holes (29) respectively.

8. A vacuum furnace cooling air volume circulation dynamic adjustment mechanism according to claim 1, characterized in that: The outer wall of the regulating cylinder (10) is sleeved with a cooling ring (5), a spiral-shaped circulation hole (13) is provided inside the cooling ring (5), the cooling ring (5) is fitted with the outer wall of the ventilation pipe (14), and a cooler (7) is fixedly connected to the bottom end of the cooling ring (5).

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