Heat treatment device for machining flange shaft of automobile transmission

Abstract

The utility model relates to the technical field of automobile transmission flange shaft machining, in particular to a heat treatment device for automobile transmission flange shaft machining. Two transmission shafts are arranged on the side face of the heating box body in a penetrating mode, high-pressure fire spraying nozzles are evenly arranged below a mounting plate, a metal crawler belt is arranged between the two transmission shafts, and the movement track of a pushing rod penetrates through the position between the two grinding rollers and intersects with a flange shaft. When a pushing rod penetrates through a first material pushing groove and moves into a horizontal section of a feeding inclined pipe, the flange shaft can be pushed out of the horizontal section of the feeding inclined pipe, the flange shaft rotates under driving of two grinding rollers, then the flange shaft is evenly heated, at the moment, under continuous pushing of the pushing rod, the flange shaft can continuously move towards a discharging inclined pipe, and therefore the flange shaft can be evenly heated. Compared with a traditional flange shaft heat treatment device, the flange shaft heat treatment device has the advantages that the heating speed is higher, and the production efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile transmission flange shaft processing, in particular to a heat treatment device for automobile transmission flange shaft processing. Background Art

[0002] The automobile transmission is a set of speed-changing devices in the existing automobile drive components, which is used to coordinate the engine speed and the actual driving speed of the wheels. It can maximize the engine performance. The transmission flange shaft is a connecting component in the transmission, which is used to improve the connection stability and connection strength between the flange and the shaft. Therefore, the flange shaft needs to be heat treated to obtain higher metal strength.

[0003] A patent with announcement number CN 116287650 A discloses a heat treatment device for automobile flange shaft, including a box body, a turntable rotatably mounted on the inner wall of the annular groove, a C-shaped plate slidably mounted on the lower surface of the fixed plate, and a movable plate that can move up and down is slidably mounted between the outer surfaces of the opposite sides of the C-shaped plate. The rotating shaft drives the turntable to rotate, so that the flange shaft placed on the turntable can rotate, so that multiple high-pressure flame spray nozzles installed on the lower surface of the movable plate can evenly heat the flange shaft, and the effect of uniform heating is achieved by cooperation, thereby avoiding deformation of the flange shaft due to uneven heating.

[0004] However, since the existing flange shaft heat treatment device can only heat the flange shaft from the top, it is impossible to directly heat the entire flange shaft, resulting in a slow heating rate, affecting the subsequent production and processing efficiency, and cannot perform continuous preheating treatment; therefore, a heat treatment device for automobile transmission flange shaft processing is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and to address the problems existing in the prior art, the utility model provides a heat treatment device for machining a flange shaft of an automobile transmission.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows: a heat treatment device for processing a flange shaft of an automobile transmission described in the utility model comprises a heating box; two transmission shafts are provided through the side of the heating box, two supporting plates are symmetrically installed on two opposite inner walls of the heating box, and one end of the two transmission shafts located in the heating box is rotatably installed on the sides of the two supporting plates, the two transmission shafts are respectively provided with grinding rollers, and the two grinding rollers are both located in the heating box, and the two grinding rollers are provided with flange shafts, a mounting plate is installed on the top of the heating box, and high-pressure flame spray nozzles are evenly arranged under the mounting plate;

[0007] Two rotating shafts are symmetrically arranged in the heating box, and a metal track is arranged between the two rotating shafts. The transmission direction of the metal track is parallel to the grinding roller, and the metal track is located directly below the two grinding rollers. Push rods are evenly arranged on the metal track, and the movement trajectory of the push rods passes through the two grinding rollers and intersects with the flange shaft. A feed inclined pipe and a discharge inclined pipe are respectively installed on opposite sides of the heating box. The end of the feed inclined pipe outside the heating box is inclined upward, and the end of the discharge inclined pipe outside the heating box is inclined downward. The combination achieves the effect of uniform heating. Compared with the traditional flange shaft heat treatment device, the heating speed is faster, which effectively improves the production efficiency.

[0008] Preferably, pulleys are respectively installed at the ends of the two transmission shafts, a transmission belt is arranged between the two pulleys, a fixed plate is installed on the outer wall of the heating box body, a No. 1 motor is installed on the fixed plate, and the output shaft of the No. 1 motor is installed on one of the transmission shafts, so as to achieve a driving effect by cooperating to evenly heat the flange shaft.

[0009] Preferably, the two transmission shafts are parallel to each other and located in the same horizontal plane, the center lines of the two grinding rollers coincide with the center lines of the two transmission shafts respectively, the transmission shaft and the support plate are perpendicular to each other, and legs are installed under the heating box, which cooperate to achieve the function of supporting the rotation of the flange shaft.

[0010] Preferably, the distance between the two grinding rollers is smaller than the diameter of the flange shaft, and the flange shaft is located between the two grinding rollers. The active end of the high-pressure flame nozzle is symmetrically inwardly facing between the two grinding rollers, and the high-pressure flame nozzle is located directly above the two grinding rollers, so that the flange shaft can support the rotation for uniform heating.

[0011] Preferably, the rotating shaft and the grinding roller are perpendicular to each other, and the rotating shaft and the transmission shaft are perpendicular to each other. A No. 2 motor is installed on the outer wall of the heating box body through a fixing part, and the output shaft of the No. 2 motor is installed on one of the rotating shafts, so as to achieve the effect of metal track driving.

[0012] Preferably, the feed inclined tube and the discharge inclined tube are respectively installed on the two side walls of the heating box and perpendicular to the transmission shaft. One end of the feed inclined tube located in the heating box is located on two grinding rollers, and one end of the discharge inclined tube located in the heating box is located at the ends of the two grinding rollers. The cooperation achieves the effect of flange shaft pushing, so as to carry out continuous heat treatment processing.

[0013] Preferably, the feed inclined tube and the discharge inclined tube are both provided with a horizontal section at one end located in the heating box body, a No. 1 push trough is opened under the horizontal section of the feed inclined tube, a No. 2 push trough is opened under the horizontal section of the discharge inclined tube, and the motion trajectory of the end of the push rod intersects with the No. 1 push trough and the No. 2 push trough, so as to achieve the function of discharging materials and further achieve continuous heating.

[0014] Preferably, the ports of the feed inclined tube and the discharge inclined tube outside the heating box are both equipped with one-way sealing doors. The one-way sealing door in the feed inclined tube opens inward, and the one-way sealing door in the discharge inclined tube opens outward, which cooperates to improve the safety of use and effectively improve the heat utilization efficiency.

[0015] The utility model is beneficial in that:

[0016] The utility model pushes the flange shaft out of the horizontal section of the feed inclined tube when the push rod passes through the No. 1 push groove and moves to the horizontal section of the feed inclined tube. The flange shaft rotates along with the driving of the two grinding rollers, thereby uniformly heating the flange shaft. At this time, under the continuous pushing of the push rod, the flange shaft will continuously move toward the discharge inclined tube, and will be heated under the high-pressure flame nozzle in turn, thereby achieving the effect of uniform heating. Compared with the traditional flange shaft heat treatment device, the heating speed is faster, and the production efficiency is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 is a schematic diagram of a first three-dimensional structure;

[0019] Figure 2 It is a cutaway and enlarged schematic diagram of the main structure of the heat treatment component;

[0020] Figure 3 This is an enlarged schematic diagram of area A in the main structure diagram of the heat treatment component;

[0021] Figure 4 It is an enlarged schematic diagram of the main structure of the grinding roller assembly;

[0022] Figure 5 It is an enlarged schematic diagram of the main structure of the heating component;

[0023] Figure 6 This is an enlarged schematic diagram of area B in the main structure diagram of the heating component;

[0024] Figure 7 This is an enlarged schematic diagram of the main structure of the push component;

[0025] Figure 8 This is an enlarged schematic diagram of area C in the main structure diagram of the push component.

[0026] In the figure: 1. Heating box; 2. Transmission shaft; 3. Support plate; 4. Grinding roller; 5. Pulley; 6. Transmission belt; 7. No. 1 motor; 8. Fixed plate; 9. Flange shaft; 10. Mounting plate; 11. High-pressure flame nozzle; 12. Rotating shaft; 13. Metal track; 14. Push rod; 15. Feed inclined pipe; 1501. No. 1 push chute; 16. Discharge inclined pipe; 1601. No. 2 push chute; 17. No. 2 motor; 18. One-way sealing door; 19. Support leg. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-8As shown, a heat treatment device for processing a flange shaft of an automobile transmission comprises a heating box 1;Two transmission shafts 2 are provided through the side of the heating box 1, two support plates 3 are symmetrically installed on the two opposite inner walls of the heating box 1, and one end of the two transmission shafts 2 located in the heating box 1 is rotatably installed on the sides of the two support plates 3, respectively, and the two transmission shafts 2 are provided with grinding rollers 4, and the two grinding rollers 4 are both located in the heating box 1, and flange shafts 9 are provided on the two grinding rollers 4. A mounting plate 10 is installed on the top of the heating box 1, and high-pressure flamethrowers 11 are evenly arranged under the mounting plate 10. Two rotating shafts 12 are symmetrically rotated in the heating box 1, and a metal track 13 is provided between the two rotating shafts 12, and the transmission direction of the metal track 13 is parallel to the grinding roller 4 , and the metal crawler 13 is located directly below the two grinding rollers 4, and the metal crawler 13 is evenly arranged with push rods 14, and the movement trajectory of the push rod 14 passes through the two grinding rollers 4 and intersects with the flange shaft 9. The opposite sides of the heating box 1 are respectively penetrated by a feed inclined pipe 15 and a discharge inclined pipe 16, and the end of the feed inclined pipe 15 located outside the heating box 1 is inclined upward, and the end of the discharge inclined pipe 16 located outside the heating box 1 is inclined downward, and the ends of the two transmission shafts 2 are respectively installed with pulleys 5, and a transmission belt 6 is arranged between the two pulleys 5. A fixing plate 8 is installed on the outer wall of the heating box 1, and a No. 1 motor 7 is installed on the fixing plate 8, and the output shaft of the No. 1 motor 7 is installed thereon. On a transmission shaft 2, the two transmission shafts 2 are parallel to each other and are located in the same horizontal plane. The center lines of the two grinding rollers 4 coincide with the center lines of the two transmission shafts 2 respectively. The transmission shaft 2 and the support plate 3 are perpendicular to each other. A support leg 19 is installed under the heating box 1. The distance between the two grinding rollers 4 is smaller than the diameter of the flange shaft 9, and the flange shaft 9 is located between the two grinding rollers 4. The action end of the high-pressure flame spray nozzle 11 is symmetrically inwardly facing between the two grinding rollers 4. The high-pressure flame spray nozzle 11 is located directly above the two grinding rollers 4. The rotating shaft 12 is perpendicular to the grinding roller 4, and the rotating shaft 12 is perpendicular to the transmission shaft 2. A second motor 17 is installed on the outer wall of the heating box 1 through a fixing. The output shaft of the machine 17 is installed on one of the rotating shafts 12, and the feed inclined tube 15 and the discharge inclined tube 16 are respectively installed on the two side walls of the heating box 1 perpendicular to the transmission shaft 2. The end of the feed inclined tube 15 located in the heating box 1 is located on the two grinding rollers 4, and the end of the discharge inclined tube 16 located in the heating box 1 is located at the ends of the two grinding rollers 4. The ends of the feed inclined tube 15 and the discharge inclined tube 16 located in the heating box 1 are both provided with horizontal sections, and a first push groove 1501 is provided under the horizontal section of the feed inclined tube 15, and a second push groove 1601 is provided under the horizontal section of the discharge inclined tube 16, and the motion trajectory of the end of the push rod 14 intersects with the first push groove 1501 and the second push groove 1601. ;

[0029] During operation, since the existing flange shaft heat treatment device can only heat the flange shaft from the top, it is impossible to directly heat the entire flange shaft, resulting in a slow heating speed, affecting the subsequent production and processing efficiency, and cannot perform continuous preheating treatment. In this solution, by starting the No. 1 motor 7 and the No. 2 motor 17, the No. 1 motor 7 will drive one of the transmission shafts 2 to rotate when it is running, and the two transmission shafts 2 are driven by the pulley 5 and the transmission belt 6. At this time, when one of the transmission shafts 2 rotates, it will drive the other transmission shaft 2 to rotate through the pulley 5 and the transmission belt 6, and the rotation directions of the two transmission shafts 2 are the same. When the two transmission shafts 2 rotate, they will rotate separately. The two grinding rollers 4 are driven to rotate separately. When the No. 2 motor 17 is running, it will drive one of the rotating shafts 12 to rotate, and then drive the metal crawler 13 to operate. When the metal crawler 13 is running, it will drive the push rod 14 on its surface to move around the metal crawler 13, and cooperate to put the flange shaft 9 from the higher end of the feed inclined tube 15 into the heating box 1. When put in, the flange shaft 9 will move from the higher end to the lower end of the feed inclined tube 15. When the flange shaft 9 moves to the lower end of the feed inclined tube 15, it will be in the horizontal section of the feed inclined tube 15. Because the movement trajectory of the push rod 14 intersects with the No. 1 push groove 1501, when the push rod 14 passes through the No. 1 push groove 15 When 01 moves to the horizontal section of the feed inclined tube 15, the flange shaft 9 will be pushed out from the horizontal section of the feed inclined tube 15, and will fall from the lower end of the feed inclined tube 15 between the two grinding rollers 4, and will be heated by high-pressure flame spraying through the high-pressure flame spraying nozzle 11. The flame sprayed by the high-pressure flame spraying nozzle 11 is facing the side curved surface of the flange shaft 9, and the flange shaft 9 is driven by the two grinding rollers 4 to rotate, thereby uniformly heating the flange shaft 9, and the effect of uniform heating is achieved. At this time, under the continuous pushing of the propulsion rod 14, the flange shaft 9 will continue to move toward the discharge inclined tube 16, and the flange shaft 9 will also be heated by the high-pressure flame spraying nozzle 11 during the pushing process. Heating is carried out. As the flange shaft 9 is continuously put into the heating box 1 from the feed inclined tube 15, the subsequently put-in flange shaft 9 will be pushed between the two grinding rollers 4 in turn, and will be heated under the high-pressure flame nozzle 11 in turn. When the flange shaft 9 moves to the discharge inclined tube 16, it will be pushed into the horizontal section of the discharge inclined tube 16. At this time, as the push rod 14 continues to push, the flange shaft 9 entering the higher end of the discharge inclined tube 16 will be discharged from the lower end of the discharge inclined tube 16, thereby achieving the effect of continuous heating, and the effect of uniform heating is achieved. Compared with the traditional flange shaft heat treatment device, the heating speed is faster, and the production efficiency is effectively improved.

[0030] See also Figure 7-8 As shown, one-way sealing doors 18 are installed in the ports of the feed inclined tube 15 and the discharge inclined tube 16 located outside the heating box 1. The one-way sealing door 18 in the feed inclined tube 15 opens inward, and the one-way sealing door 18 in the discharge inclined tube 16 opens outward.

[0031] During operation, in order to improve the safety of use of the flange shaft heat treatment device in this scheme and improve the heat utilization efficiency, in this scheme, when the flange shaft 9 is inserted from the higher end of the feed inclined tube 15, the one-way sealing door 18 will be pushed inward, and the one-way sealing door 18 will automatically close after the flange shaft 9 is inserted, and when the flange shaft 9 is pushed to the lower end of the discharge inclined tube 16, the one-way sealing door 18 inside it will be pushed outward, and when the flange shaft 9 is discharged from the discharge inclined tube 16, the one-way sealing door 18 inside the discharge inclined tube 16 will automatically close, thereby preventing the hot air in the heating box 1 from being discharged, and under the closed protection of the one-way sealing door 18, the heat loss in the heating box 1 is reduced, thereby achieving the purpose of improving the safety of use and effectively improving the heat utilization efficiency.

[0032] Working principle: by starting the No. 1 motor 7 and the No. 2 motor 17, when the No. 1 motor 7 is running, it will drive one of the transmission shafts 2 to rotate, and the two transmission shafts 2 are driven by the pulley 5 and the transmission belt 6. At this time, when one of the transmission shafts 2 rotates, it will drive the other transmission shaft 2 to rotate through the pulley 5 and the transmission belt 6, and the rotation directions of the two transmission shafts 2 are the same. When the two transmission shafts 2 rotate, they will respectively drive the two grinding rollers 4 to rotate. When the No. 2 motor 17 is running, it will drive one of the rotating shafts 12 to rotate, and then drive the metal crawler 13 to rotate, and when the metal crawler 13 is running, It will drive the propulsion rod 14 on its surface to move around the metal track 13, and cooperate to put the flange shaft 9 from the higher end of the feed inclined tube 15 into the heating box 1. When put in, the flange shaft 9 will move from the higher end to the lower end of the feed inclined tube 15. When the flange shaft 9 moves to the lower end of the feed inclined tube 15, it will be in the horizontal section of the feed inclined tube 15. Because the movement trajectory of the propulsion rod 14 intersects with the No. 1 push groove 1501, when the propulsion rod 14 passes through the No. 1 push groove 1501 and moves to the horizontal section of the feed inclined tube 15, the flange shaft 9 will be pushed out from the horizontal section of the feed inclined tube 15, and It falls from the lower end of the feed inclined tube 15 between the two grinding rollers 4, and is heated by high-pressure flame spraying through the high-pressure flame spraying nozzle 11. The flame sprayed by the high-pressure flame spraying nozzle 11 is facing the side curved surface of the flange shaft 9, and the flange shaft 9 is rotated by the two grinding rollers 4, so that the flange shaft 9 is evenly heated, and the effect of uniform heating is achieved. At this time, under the continuous pushing of the push rod 14, the flange shaft 9 will continue to move toward the discharge inclined tube 16, and the flange shaft 9 will also be heated by the high-pressure flame spraying nozzle 11 during the pushing process. As the flange shaft 9 is continuously pushed from the feed inclined tube 16, the flange shaft 9 is heated by the high-pressure flame spraying nozzle 11. 5 is put into the heating box 1, and the flange shaft 9 put in subsequently will be pushed between the two grinding rollers 4 in turn, and will be heated under the high-pressure flame nozzle 11 in turn. When the flange shaft 9 moves to the discharge inclined pipe 16, it will be pushed into the horizontal section of the discharge inclined pipe 16. At this time, as the push rod 14 continues to push, the flange shaft 9 entering the higher end of the discharge inclined pipe 16 will be discharged from the lower end of the discharge inclined pipe 16, thereby achieving the effect of continuous heating, and the effect of uniform heating is achieved. Compared with the traditional flange shaft heat treatment device, the heating speed is faster, and the production efficiency is effectively improved.

[0033] When the flange shaft 9 is inserted from the higher end of the feed inclined tube 15, the one-way sealing door 18 will be pushed inwards; after the flange shaft 9 is inserted, the one-way sealing door 18 will automatically close; and when the flange shaft 9 is pushed to the lower end of the discharge inclined tube 16, the one-way sealing door 18 therein will be pushed outwards; when the flange shaft 9 is discharged from the discharge inclined tube 16, the one-way sealing door 18 inside the discharge inclined tube 16 will automatically close, thereby preventing the hot air in the heating box 1 from being discharged, and under the closed protection of the one-way sealing door 18, the heat loss in the heating box 1 is reduced, thereby achieving the purpose of improving the safety of use and effectively improving the heat utilization efficiency.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A heat treatment device for processing a flange shaft of an automobile transmission, characterized in that: It comprises a heating box (1); two transmission shafts (2) are provided through the side of the heating box (1); two support plates (3) are symmetrically installed on two opposite inner walls of the heating box (1); one end of the two transmission shafts (2) located in the heating box (1) is rotatably installed on the sides of the two support plates (3); the two transmission shafts (2) are respectively provided with grinding rollers (4), and the two grinding rollers (4) are both located in the heating box (1); flange shafts (9) are provided on the two grinding rollers (4); a mounting plate (10) is installed on the top of the heating box (1); and high-pressure flame spray nozzles (11) are evenly arranged under the mounting plate (10); Two rotating shafts (12) are symmetrically arranged in the heating box (1), and a metal track (13) is arranged between the two rotating shafts (12). The transmission direction of the metal track (13) is parallel to the grinding roller (4), and the metal track (13) is located directly below the two grinding rollers (4). Push rods (14) are evenly arranged and installed on the metal track (13), and the movement trajectory of the push rods (14) passes through the two grinding rollers (4) and intersects with the flange shaft (9). A feed inclined pipe (15) and a discharge inclined pipe (16) are respectively installed on opposite sides of the heating box (1), and the end of the feed inclined pipe (15) located outside the heating box (1) is arranged to be inclined upward, and the end of the discharge inclined pipe (16) located outside the heating box (1) is arranged to be inclined downward.

2. The heat treatment device for processing the flange shaft of an automobile transmission according to claim 1, characterized in that: Pulleys (5) are respectively installed at the ends of the two transmission shafts (2), and a transmission belt (6) is arranged between the two pulleys (5). A fixing plate (8) is installed on the outer wall of the heating box (1), and a No. 1 motor (7) is installed on the fixing plate (8), and the output shaft of the No. 1 motor (7) is installed on one of the transmission shafts (2).

3. The heat treatment device for processing the flange shaft of an automobile transmission according to claim 1, characterized in that: The two transmission shafts (2) are parallel to each other and located in the same horizontal plane. The center lines of the two grinding rollers (4) coincide with the center lines of the two transmission shafts (2) respectively. The transmission shafts (2) and the support plate (3) are perpendicular to each other. A support leg (19) is installed under the heating box (1).

4. The heat treatment device for processing the flange shaft of an automobile transmission according to claim 1, characterized in that: The distance between the two grinding rollers (4) is smaller than the diameter of the flange shaft (9), and the flange shaft (9) is located between the two grinding rollers (4). The active end of the high-pressure flame spray nozzle (11) is symmetrically inwardly facing between the two grinding rollers (4), and the high-pressure flame spray nozzle (11) is located directly above the two grinding rollers (4).

5. The heat treatment device for processing the flange shaft of an automobile transmission according to claim 1, characterized in that: The rotating shaft (12) and the sanding roller (4) are perpendicular to each other, and the rotating shaft (12) and the transmission shaft (2) are perpendicular to each other. A second motor (17) is mounted on the outer wall of the heating box (1) via a fixing member, and an output shaft of the second motor (17) is mounted on one of the rotating shafts (12).

6. The heat treatment device for processing the flange shaft of an automobile transmission according to claim 1, characterized in that: The feed inclined tube (15) and the discharge inclined tube (16) are respectively mounted on two side walls of the heating box (1) perpendicular to the transmission shaft (2); one end of the feed inclined tube (15) located inside the heating box (1) is located on the two grinding rollers (4); and one end of the discharge inclined tube (16) located inside the heating box (1) is located at the ends of the two grinding rollers (4).

7. The heat treatment device for processing the flange shaft of an automobile transmission according to claim 1, characterized in that: The feed inclined tube (15) and the discharge inclined tube (16) are both provided with a horizontal section at one end located in the heating box (1); a first push groove (1501) is provided under the horizontal section of the feed inclined tube (15); a second push groove (1601) is provided under the horizontal section of the discharge inclined tube (16); and the movement trajectory of the end of the push rod (14) intersects with the first push groove (1501) and the second push groove (1601).

8. The heat treatment device for processing the automobile transmission flange shaft according to claim 1, characterized in that: One-way sealing doors (18) are installed in the ports of the feed inclined tube (15) and the discharge inclined tube (16) located outside the heating box (1); the one-way sealing door (18) in the feed inclined tube (15) opens inwards, and the one-way sealing door (18) in the discharge inclined tube (16) opens outwards.

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