Auxiliary material proportioning bin for selenium-rich tablet production

Abstract

The utility model discloses an auxiliary material proportioning bin for selenium-rich tablet production. The auxiliary material proportioning bin comprises a material bin, a quantitative discharging mechanism and a stirring mechanism, uniformly distributed support arms are arranged at the edge of the lower end of the stock bin, feed boxes are respectively arranged at feed ports at the upper end of the stock bin, and protective covers are respectively arranged at the lower ends of opposite surfaces of the feed boxes; the quantitative discharging mechanism comprises rotating shafts, supports, angle sensors, scraping plates and quantitative columns, the rotating shafts are rotationally connected to the lower ends of the interiors of the material boxes correspondingly, the quantitative columns fixedly sleeve the rotating shafts correspondingly, quantitative grooves are formed in the outer surfaces of the quantitative columns correspondingly, and the supports are arranged on the bottom walls of the protective covers correspondingly; according to the auxiliary material proportioning bin for selenium-rich tablet production, the proportioning of selenium-rich tablet auxiliary materials is more accurate, the proportioning amount of the selenium-rich tablet auxiliary materials is convenient to adjust, meanwhile, the selenium-rich tablet auxiliary materials in the container are stirred, and the selenium-rich tablet auxiliary materials are prevented from caking.

Description

Technical Field

[0001] The utility model relates to the technical field of selenium-enriched tablet production, in particular to an auxiliary material proportioning bin for selenium-enriched tablet production. Background Art

[0002] Selenium-enriched tablets are a kind of medicine, the main ingredients of which are hydroxypropyl methylcellulose and propylene glycol. Selenium is a trace mineral nutrient that is essential to the human body. Selenium-enriched yeast is obtained by adding selenium during the yeast culture process. The yeast absorbs and utilizes selenium during growth, and the selenium is organically combined with the protein and polysaccharide in the yeast body to be converted into biological selenium, thereby eliminating the toxic and side effects and gastrointestinal irritation of chemical selenium (such as sodium selenite) on the human body, so that selenium can be absorbed and utilized by the human body more efficiently and safely. Selenium-enriched yeast is also the most efficient, safest and most nutritionally balanced selenium supplement preparation to date, and has many health care functions;

[0003] The existing proportion of auxiliary materials used in the production of selenium-enriched tablets is achieved by manually weighing and proportioning the auxiliary materials of selenium-enriched tablets;

[0004] The traditional auxiliary material proportioning bin for the production of selenium-rich tablets has the following problems: the gravity sensor proportioning method has low accuracy, the amount of auxiliary material proportioning cannot be adjusted, and the auxiliary material after proportioning is prone to agglomeration in the container. For this reason, we propose an auxiliary material proportioning bin for the production of selenium-rich tablets. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide an auxiliary material proportioning bin for the production of selenium-rich tablets, so as to achieve more accurate proportioning of the auxiliary materials of selenium-rich tablets and facilitate adjustment of the proportioning amount of the auxiliary materials of selenium-rich tablets. At the same time, the auxiliary materials of selenium-rich tablets in the container can be stirred to prevent the auxiliary materials of selenium-rich tablets from agglomerating, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an auxiliary material proportioning bin for the production of selenium-enriched tablets, comprising a bin, a quantitative feeding mechanism and a stirring mechanism;

[0007] Silo: Evenly distributed supporting arms are provided at the lower edge of the silo, and material boxes are provided at the upper feed inlet of the silo, and protective covers are provided at the lower ends of the opposite sides of the material boxes;

[0008] Quantitative unloading mechanism: it includes a rotating shaft, a bracket, an angle sensor, a scraper plate and a quantitative column. The lower end of the material box is rotatably connected with the rotating shaft, the outside of the rotating shaft is fixedly sleeved with a quantitative column, the outer surface of the quantitative column is respectively provided with a quantitative groove, the bottom wall of the protective cover is respectively provided with a bracket, the upper end of the bracket is respectively provided with an angle sensor, the middle part of the counting shaft of the angle sensor is fixedly connected with the center of the opposite end of the rotating shaft, and the interior of the material box is respectively provided with a front-to-back symmetrical scraper plate, and the opposite ends of the scraper plate are in contact with the outer arc surface of the quantitative column;

[0009] Stirring mechanism: It is arranged at the upper end of the silo;

[0010] Among them: a single-chip microcomputer is provided on the left side of the left support arm, the input end of the single-chip microcomputer is electrically connected to an external power supply, and the angle sensors are electrically connected to the single-chip microcomputer in both directions, so as to achieve more accurate proportioning of selenium-rich tablet auxiliary materials, facilitate adjustment of the proportion of selenium-rich tablet auxiliary materials, and at the same time stir the selenium-rich tablet auxiliary materials in the container to prevent the selenium-rich tablet auxiliary materials from agglomerating.

[0011] Furthermore, the quantitative unloading mechanism also includes a motor 1, a worm and a worm wheel. The opposite ends of the rotating shaft are respectively fixedly sleeved with worm wheels, the lower end of the protective cover is respectively provided with a motor 1, and the upper end of the output shaft of the motor 1 is respectively fixedly connected with a worm. The worms are meshingly connected with adjacent worm wheels, and the input end of the motor 1 is electrically connected to the output end of the single-chip microcomputer to provide unloading drive.

[0012] Furthermore, the quantitative unloading mechanism also includes a quantitative trough volume adjustment component, which includes an adjustment block, a rack, a rotating shaft, a gear, a support plate and a dial wheel. The interior of the quantitative trough is slidably connected with an adjustment block, and the opposite ends of the quantitative column are respectively provided with a support plate. The front side surfaces of the lower ends of the adjustment blocks are respectively provided with racks, and the upper ends of the support plates are respectively rotatably connected with the rotating shafts. The upper ends of the rotating shafts are respectively fixedly sleeved with gears, and the racks are meshed and connected with adjacent gears. The lower ends of the rotating shafts are respectively fixedly connected with dial wheels to achieve volume adjustment.

[0013] Furthermore, the quantitative tank volume adjustment assembly also includes locking bolts, and the edges of the dial wheel are respectively threadedly connected with locking bolts, and the upper ends of the locking bolts are mounted in cooperation with the bottom surfaces of adjacent support plates for easy locking.

[0014] Furthermore, the stirring mechanism includes a rotating column and stirring rods, the upper end of the rotating column is rotatably connected to the top wall of the silo, and the outside of the rotating column is provided with evenly distributed stirring rods to achieve stirring.

[0015] Furthermore, the stirring mechanism also includes a second motor, which is arranged at the upper end of the silo, the lower end of the output shaft of the second motor is fixedly connected to the upper end of the rotating column, and the input end of the second motor is electrically connected to the output end of the single-chip microcomputer to provide stirring drive.

[0016] Furthermore, a feed pipe is provided at the upper feed port of the material box, a discharge pipe is provided at the lower discharge port of the material bin, and a valve is connected in series at the upper end of the discharge pipe to facilitate feeding and discharging of materials.

[0017] Compared with the prior art, the beneficial effects of the utility model are: the auxiliary material proportioning bin for the production of selenium-rich tablets has the following advantages:

[0018] 1. First, different auxiliary materials are injected into different material boxes through the feeding pipe. When the selenium-rich tablets need to be proportioned, the single-chip microcomputer is controlled to make the motor one run respectively. The output shaft of the motor one drives the rotating shaft to rotate respectively. The rotation of the rotating shaft drives the quantitative column to rotate respectively. The edge of the quantitative column is tightly fitted with the cross section of the scraper plate inside the material box. When the quantitative groove is directly opposite to the cross section of the scraper plate, the auxiliary materials fall into the quantitative groove respectively. When the cross section of the quantitative groove and the scraper plate is misaligned, the excess part is scraped off by the cross section of the scraper plate and retained at the upper end of the material box, and the quantitative auxiliary materials are brought down by the rotation of the quantitative column until the quantitative auxiliary materials are discharged into the material bin through the material box because the quantitative groove is completely at the bottom. Since the quantitative groove is quantitative and the angle sensor is aligned with the quantitative column in real time, the quantitative auxiliary materials are discharged into the material bin through the material box. The number of rotation circles is measured and integrated through the single-chip microcomputer. The number of circles and the volume of the quantitative groove are the amount of auxiliary material added. Then the single-chip microcomputer is regulated. Once the motor stops running, the quantitative column will no longer add. When it is necessary to adjust the amount of the quantitative groove on the quantitative column, the dial wheel is twisted, and the dial wheel drives the rotating shaft to rotate, the rotating shaft drives the gear to rotate, and the gear drives the meshing rack to slide to the middle, and then pushes the adjusting block to the middle, so as to adjust the volume of the quantitative groove on the quantitative column with the reference of the quantitative column. After adjustment, the external bolt can be penetrated through the threaded hole on the dial wheel until the locking bolt is tightened against the support plate on the quantitative column, so as to fix the rotating shaft and the adjusting block, so as to achieve a more accurate ratio of the auxiliary materials of the selenium-rich tablets, and facilitate the adjustment of the ratio of the auxiliary materials of the selenium-rich tablets.

[0019] 2. In order to prevent the auxiliary materials from agglomerating and solidifying in the silo after proportioning, the single-chip microcomputer is controlled to make motor 2 run. The output shaft of motor 2 drives the rotating column to rotate, and then drives the stirring rod to rotate. The stirring rod rotates to stir the auxiliary materials in the silo to prevent the auxiliary materials from agglomerating and solidifying. At the same time, the selenium-rich flake auxiliary materials in the container are stirred to prevent them from agglomerating. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 3 This is an enlarged structural diagram of the utility model at A;

[0023] Figure 4 This is an enlarged structural diagram of the utility model at B;

[0024] Figure 5 This is a schematic diagram of the structure of the quantitative tank volume adjustment component of the utility model.

[0025] In the figure: 1 silo, 2 support arm, 3 single chip microcomputer, 4 material box, 5 feed pipe, 6 protective cover, 7 quantitative unloading mechanism, 71 motor 1, 72 worm, 73 worm wheel, 74 rotating shaft, 75 bracket, 76 angle sensor, 77 scraper plate, 78 quantitative column, 79 quantitative tank volume adjustment component, 791 adjustment block, 792 rack, 793 rotating shaft, 794 gear, 795 locking bolt, 796 support plate, 797 dial wheel, 8 stirring mechanism, 81 motor 2, 82 rotating column, 85 stirring rod, 9 discharge pipe, 10 valve. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-5 , This embodiment provides a technical solution: an auxiliary material proportioning bin for selenium-enriched tablet production, comprising a bin 1, a quantitative feeding mechanism 7 and a stirring mechanism 8;

[0028] Silo 1: The lower edge thereof is provided with evenly distributed supporting arms 2, the upper feed port of the silo 1 is provided with a material box 4, the lower ends of the opposite sides of the material box 4 are provided with a protective cover 6, the upper feed port of the material box 4 is provided with a feed pipe 5, the lower discharge port of the silo 1 is provided with a discharge pipe 9, and the upper end of the discharge pipe 9 is connected in series with a valve 10;

[0029] Quantitative unloading mechanism 7: It includes a rotating shaft 74, a bracket 75, an angle sensor 76, a scraper plate 77 and a quantitative column 78. The lower end of the inside of the material box 4 is rotatably connected with the rotating shaft 74, and the outside of the rotating shaft 74 is respectively fixedly sleeved with a quantitative column 78. The outer surface of the quantitative column 78 is respectively provided with a quantitative groove. The bottom wall of the protective cover 6 is respectively provided with a bracket 75, and the upper end of the bracket 75 is respectively provided with an angle sensor 76. The middle part of the counting shaft of the angle sensor 76 is fixedly connected to the center of the opposite end of the rotating shaft 74. The inside of the material box 4 is respectively provided with a front-to-back symmetrical scraper plate 77, and the opposite ends of the scraper plate 77 are in contact with the outer arc surface of the quantitative column 78. The quantitative unloading mechanism 7 also includes a motor 71, a worm 72 and a worm wheel 73. The opposite ends of the rotating shaft 74 are respectively fixed. The fixed sleeve is provided with a worm gear 73, and the lower end of the protective cover 6 is respectively provided with a motor 71. The upper end of the output shaft of the motor 71 is respectively fixedly connected with a worm 72. The worm 72 is meshed with the adjacent worm gear 73. The input end of the motor 71 is electrically connected to the output end of the single-chip computer 3. The quantitative unloading mechanism 7 also includes a quantitative tank volume adjustment component 79. The quantitative tank volume adjustment component 79 includes an adjustment block 791, a rack 792, a rotating shaft 793, a gear 794, a support plate 796 and a dial wheel 797. The interior of the quantitative tank is respectively slidably connected with an adjustment block 791, and the opposite ends of the quantitative column 78 are respectively provided with a support plate 796. The front side of the lower end of the adjustment block 791 is respectively provided with a rack 792. The upper end of the support plate 796 is rotatably connected with the rotating shaft 793. The upper end of the rotating shaft 793 is respectively provided with a support plate 796. The ends are respectively fixed with gears 794, racks 792 are meshed with adjacent gears 794, the lower ends of rotating shafts 793 are respectively fixedly connected with dial wheels 797, the quantitative tank volume adjustment assembly 79 also includes locking bolts 795, the edges of dial wheels 797 are respectively threadedly connected with locking bolts 795, the upper ends of locking bolts 795 are respectively installed in cooperation with the bottom surfaces of adjacent support plates 796, firstly, different auxiliary materials are respectively injected into different material boxes 4 through the feed pipes 5, when it is necessary to proportion the selenium-rich tablets, by regulating the single-chip computer 3, the motor 71 is respectively operated, the output shaft of the motor 71 respectively drives the rotating shaft 74 to rotate, the rotation of the rotating shaft 74 respectively drives the quantitative column 78 to rotate, the edge of the quantitative column 78 is cut with the scraper plate 77 inside the material box 4 The two parts are tightly fitted together. When the quantitative groove and the cross section of the scraper plate 77 are facing each other, the auxiliary materials fall into the interior of the quantitative groove respectively. When the cross section of the quantitative groove and the scraper plate 77 are misaligned, the excess part is scraped off by the cross section of the scraper plate 77 and retained at the upper end of the material box 4, and the quantitative auxiliary materials are brought down by the rotation of the quantitative column 78 until the quantitative auxiliary materials are discharged into the material bin 1 through the material box 4 because the quantitative groove is completely at the bottom. Since the quantitative groove is quantitative and the angle sensor 76 measures the number of rotations of the quantitative column 78 in real time, it is integrated through the single-chip microcomputer 3. The number of rotations and the volume of the quantitative groove are the amount of auxiliary materials added. Then the single-chip microcomputer 3 is regulated, the motor 71 stops running, and the quantitative column 78 is no longer added. When it is necessary to adjust the amount of the quantitative groove on the quantitative column 78, by twisting the dial wheel 797,The thumbwheel 797 drives the rotating shaft 793 to rotate, the rotating shaft 793 drives the gear 794 to rotate, the gear 794 drives the meshing rack 792 to slide toward the middle, and then pushes the adjustment block 791 toward the middle, so that the volume of the quantitative groove on the quantitative column 78 can be adjusted under the reference of the quantitative column 78. After adjustment, the external bolt can be threaded deeply through the threaded hole on the thumbwheel 797 until the locking bolt 795 is tightened against the support plate 796 on the quantitative column 78, so as to fix the rotating shaft 793 and the adjustment block 791;

[0030] Stirring mechanism 8: It is arranged at the upper end of the silo 1, and the stirring mechanism 8 includes a rotating column 82 and a stirring rod 85. The upper end of the rotating column 82 is rotatably connected to the top wall of the silo 1, and the outside of the rotating column 82 is provided with evenly distributed stirring rods 85. The stirring mechanism 8 also includes a second motor 81, which is arranged at the upper end of the silo 1. The lower end of the output shaft of the second motor 81 is fixedly connected to the upper end of the rotating column 82, and the input end of the second motor 81 is electrically connected to the output end of the single-chip computer 3. In order to prevent the auxiliary materials after proportioning from agglomerating and solidifying in the silo 1, the single-chip computer 3 is controlled and the second motor 81 is operated, and the output shaft of the second motor 81 drives the rotating column 82 to rotate, thereby driving the stirring rod 85 to rotate, and the stirring rod 85 rotates to stir the auxiliary materials in the silo 1 to prevent the auxiliary materials from agglomerating and solidifying;

[0031] Wherein: a single chip microcomputer 3 is disposed on the left side surface of the left support arm 2 , an input end of the single chip microcomputer 3 is electrically connected to an external power supply, and the angle sensor 76 is bidirectionally electrically connected to the single chip microcomputer 3 .

[0032] The working principle of the auxiliary material proportioning bin for selenium-enriched tablet production provided by the utility model is as follows: first, different auxiliary materials are respectively injected into different material boxes 4 through the feed pipe 5. When the selenium-enriched tablets need to be proportioned, the single-chip microcomputer 3 is regulated, and the motor 71 is respectively operated. The output shaft of the motor 71 drives the rotating shaft 74 to rotate respectively. The rotation of the rotating shaft 74 drives the quantitative column 78 to rotate respectively. The edge of the quantitative column 78 is tightly fitted with the cross section of the scraper plate 77 inside the material box 4. When the quantitative groove and the cross section of the scraper plate 77 are When facing each other, after the auxiliary materials fall into the inside of the quantitative groove respectively, when the section of the quantitative groove and the scraper plate 77 are misaligned, the excess part is scraped off by the section of the scraper plate 77 and retained at the upper end of the material box 4, and the quantitative auxiliary materials are brought down by the rotation of the quantitative column 78 until the quantitative auxiliary materials are discharged into the material bin 1 through the material box 4 because the quantitative groove is completely at the bottom. Since the quantitative groove is quantitative and the angle sensor 76 measures the number of rotations of the quantitative column 78 in real time, through the integration of the single-chip microcomputer 3, the number of rotations and the volume of the quantitative groove are the amount of auxiliary materials added. Then, the single chip computer 3 is regulated, the motor 1 71 stops running, and the quantitative column 78 is no longer added. When the amount of the quantitative slot on the quantitative column 78 needs to be adjusted, the dial wheel 797 is twisted, the dial wheel 797 drives the rotating shaft 793 to rotate, the rotating shaft 793 drives the gear 794 to rotate, and the gear 794 drives the meshing rack 792 to slide toward the middle, thereby pushing the adjustment block 791 toward the middle, and the volume of the quantitative slot on the quantitative column 78 can be adjusted under the reference of the quantitative column 78. After adjustment, the volume can be adjusted by the external The threaded bolts penetrate deep into the threaded holes on the dial wheel 797 until the locking bolts 795 are tightened against the support plates 796 on the quantitative columns 78, thereby fixing the rotating shaft 793 and the adjusting block 791. In order to prevent the proportioned auxiliary materials from agglomerating and solidifying in the silo 1, the single-chip microcomputer 3 is controlled to operate the motor 2 81, and the output shaft of the motor 2 81 drives the rotating column 82 to rotate, thereby driving the stirring rod 85 to rotate. The stirring rod 85 rotates to stir the auxiliary materials in the silo 1 to prevent the auxiliary materials from agglomerating and solidifying.

[0033] It is worth noting that the motor 1 71, angle sensor 76 and motor 2 81 disclosed in the above embodiments, motor 1 71 can all use 81KS-370, angle sensor 76 can use WDD-D35-SA, motor 2 81 can use 5Ik12RGU-CF, and the single chip microcomputer 3 controls the operation of motor 1 71, angle sensor 76 and motor 2 81 using methods commonly used in the prior art.

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A supplementary material proportioning bin for the production of selenium-enriched tablets, characterized in that: It comprises a silo (1), a quantitative feeding mechanism (7) and a stirring mechanism (8); The silo (1) is provided with evenly distributed supporting arms (2) at the lower edge thereof, and a material box (4) is provided at the upper feed port of the silo (1), and a protective cover (6) is provided at the lower end of the opposite side of the material box (4); A quantitative unloading mechanism (7): comprising a rotating shaft (74), a bracket (75), an angle sensor (76), a scraper plate (77) and a quantitative column (78); the lower end of the material box (4) is rotatably connected to the rotating shaft (74); the outer part of the rotating shaft (74) is fixedly sleeved with a quantitative column (78); the outer surface of the quantitative column (78) is provided with a quantitative groove; the bottom wall of the protective cover (6) is provided with a bracket (75); the upper end of the bracket (75) is provided with an angle sensor (76); the middle part of the counting shaft of the angle sensor (76) is fixedly connected to the center of the opposite end of the rotating shaft (74); the material box (4) is provided with a front-to-back symmetrical scraper plate (77); the opposite ends of the scraper plate (77) are in contact with the outer arc surface of the quantitative column (78); A stirring mechanism (8): arranged at the upper end of the silo (1); Wherein: a single chip computer (3) is provided on the left side surface of the left support arm (2), an input end of the single chip computer (3) is electrically connected to an external power supply, and the angle sensor (76) is bidirectionally electrically connected to the single chip computer (3).

2. The auxiliary material proportioning bin for producing selenium-enriched tablets according to claim 1, characterized in that: The quantitative unloading mechanism (7) further comprises a motor 1 (71), a worm (72) and a worm wheel (73); the opposite ends of the rotating shaft (74) are respectively fixedly sleeved with worm wheels (73); the lower ends of the protective covers (6) are respectively provided with motor 1 (71); the upper ends of the output shafts of the motor 1 (71) are respectively fixedly connected with worm wheels (72); the worm wheels (72) are meshingly connected with adjacent worm wheels (73); and the input ends of the motor 1 (71) are respectively electrically connected to the output ends of the single-chip computer (3).

3. The auxiliary material proportioning bin for producing selenium-enriched tablets according to claim 2, characterized in that: The quantitative unloading mechanism (7) further comprises a quantitative tank volume adjustment assembly (79), the quantitative tank volume adjustment assembly (79) comprising an adjustment block (791), a rack (792), a rotating shaft (793), a gear (794), a support plate (796) and a thumbwheel (797), the interior of the quantitative tank is slidably connected with an adjustment block (791), the opposite ends of the quantitative column (78) are provided with a support plate (796), the lower end front side surface of the adjustment block (791) is provided with a rack (792), the upper end of the support plate (796) is rotatably connected with a rotating shaft (793), the upper end of the rotating shaft (793) is fixedly sleeved with a gear (794), the rack (792) is meshedly connected with an adjacent gear (794), and the lower end of the rotating shaft (793) is fixedly connected with a thumbwheel (797).

4. The auxiliary material proportioning bin for producing selenium-enriched tablets according to claim 3, characterized in that: The quantitative tank volume adjustment assembly (79) further comprises locking bolts (795), and the edges of the thumbwheel (797) are respectively threadedly connected with the locking bolts (795), and the upper ends of the locking bolts (795) are respectively mounted in cooperation with the bottom surfaces of the adjacent support plates (796).

5. The auxiliary material proportioning bin for producing selenium-enriched tablets according to claim 1, characterized in that: The stirring mechanism (8) comprises a rotating column (82) and stirring rods (85); the upper end of the rotating column (82) is rotatably connected to the top wall of the silo (1); and the outside of the rotating column (82) is provided with stirring rods (85) evenly distributed.

6. The auxiliary material proportioning bin for producing selenium-enriched tablets according to claim 5, characterized in that: The stirring mechanism (8) further comprises a second motor (81), wherein the second motor (81) is arranged at the upper end of the silo (1), the lower end of the output shaft of the second motor (81) is fixedly connected to the upper end of the rotating column (82), and the input end of the second motor (81) is electrically connected to the output end of the single chip computer (3).

7. The auxiliary material proportioning bin for producing selenium-enriched tablets according to claim 1, characterized in that: A feed pipe (5) is provided at the feed inlet at the upper end of the material box (4), a discharge pipe (9) is provided at the discharge outlet at the lower end of the material bin (1), and a valve (10) is connected in series at the upper end of the discharge pipe (9).

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