Flavored preserved meat fermentation device with tumbling and ventilating functions

Abstract

The invention discloses a flavor preserved meat fermentation device with rolling and ventilating functions, and relates to the technical field of air-drying fermentation equipment, the flavor preserved meat fermentation device comprises a fermentation barrel, the inner side of the fermentation barrel is movably connected with a main gear, a driven gear and an annular gear, the driven gear and the annular gear are jointly engaged with the main gear, and the auxiliary gear is movably connected with the annular gear; a tumbling fermentation assembly is jointly arranged on a driven gear and an annular gear, preserved meat can be hung on a hook, rotation of the driven gear can drive a rotary disc and the hook to rotate at the same time, rotation of a main gear can drive the annular gear to rotate, and rotation of a threaded rod can drive a vertical rod to move back and forth in the horizontal direction; a vertical rod moves back and forth to drive a rolling and kneading roller to intermittently roll and knead the preserved meat, a ventilation promoting assembly is arranged on the lower portion of an annular gear, a fan is started to supply air to the inner side of a first hollow pipe, the air can be blown to the outer side of the preserved meat from an air outlet pipe, and a movable door is movably connected to the outer side of the fermentation barrel.

Description

Technical Field

[0001] The present invention relates to the technical field of air-drying fermentation equipment, and particularly to a flavor bacon fermentation device with tumbling and ventilation functions. Background Art

[0002] Cured meat products are raw meat products processed through processes such as pretreatment, curing, sauce-making, sun-drying (or baking), etc. They need to be cooked before consumption and are one of the traditional meat products in China. Cured meat products have the characteristics of being convenient to operate, having firm and solid meat texture, distinct red and white colors, salty and delicious taste, unique flavor, being easy to carry and store for a long time. The main cured meat products in China include cured meat, salted meat, air-dried meat, and Chinese-style ham.

[0003] When producing cured meat with a pickled flavor, it is necessary to apply a brine mixed with a fermentation broth to the surface of the meat blocks and perform tumbling to improve the quality and taste of the cured meat through pickling. In traditional cured meat production, applying the brine and tumbling are two separate processes. There are roughly two existing application methods. One is to spray the fermentation broth onto the surface of the cured meat through a nozzle, and the other is manual application. Although directly spraying the fermentation broth has a higher efficiency, the fermentation broth on the surface of the cured meat is not kneaded, resulting in the fermentation broth not penetrating into the meat blocks and only remaining on the surface of the cured meat. Moreover, the surface of the meat is not flat, so the cured meat produced is not well-seasoned. In a static pickling environment, the oxygen distribution is uneven, with excessive oxidation on the surface and lack of oxygen inside, which inhibits the deep decomposition of proteins by aerobic bacteria and results in a low conversion efficiency of flavor precursor substances. Therefore, it is necessary to propose a flavor bacon fermentation device with tumbling and ventilation functions. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, such as the fermentation broth on the surface of the cured meat not being kneaded, resulting in the fermentation broth not penetrating into the meat blocks and only remaining on the surface of the cured meat, the surface of the meat not being flat, the cured meat produced not being well-seasoned, uneven oxygen distribution in a static pickling environment, excessive oxidation on the surface and lack of oxygen inside, which inhibits the deep decomposition of proteins by aerobic bacteria and results in a low conversion efficiency of flavor precursor substances, and to propose a flavor bacon fermentation device with tumbling and ventilation functions.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A flavor bacon fermentation device with tumbling and ventilation functions, comprising a fermentation barrel. A main gear, a driven gear and an annular gear are movably connected inside the fermentation barrel. The driven gear and the annular gear are meshed with the main gear together. A tumbling fermentation assembly is arranged on the driven gear and the annular gear together. The tumbling fermentation assembly includes a turntable movably connected to the driven gear, a plurality of hooks arranged below the turntable, a threaded rod movably connected to the annular gear, a plurality of vertical rods, and a tumbling roller movably connected to the outside of the vertical rod. The bacon will be hung on the hooks. The rotation of the driven gear will drive the turntable and the hooks to rotate simultaneously. The rotation of the main gear will drive the annular gear to rotate. The rotation of the threaded rod will drive the vertical rod to move back and forth in the horizontal direction. The back-and-forth movement of the vertical rod will drive the tumbling roller to intermittently tumble the bacon. A ventilation promoting assembly is arranged below the annular gear. The ventilation promoting assembly includes a fan movably connected to the annular gear, a first hollow tube, and a plurality of air outlet pipes arranged on the outside of the first hollow tube. The start of the fan will send air to the inside of the first hollow tube, and the air will blow to the outside of the bacon from the air outlet pipes. A movable door is movably connected to the outside of the fermentation barrel.

[0006] The above technical solution further includes: A first servo motor is fixedly connected to the inside of the fermentation barrel. The end of the output shaft of the first servo motor is fixedly connected to the main gear. The rotation of the output shaft of the first servo motor will drive the main gear to rotate.

[0007] A connecting rod is rotatably connected to the top inside the fermentation barrel. The outside of the connecting rod is fixedly connected to the driven gear. An extension tube is fixedly connected to the side of the driven gear away from the connecting rod. The end of the extension tube away from the driven gear is fixedly connected to the turntable. When the driven gear rotates, it will drive the extension tube and thus drive the turntable to perform a circular motion.

[0008] One end of the turntable away from the extension tube is fixedly connected to a plurality of hooks. The plurality of hooks are arranged in a circular and evenly distributed manner along the turntable. An auxiliary rod is fixedly connected to the end of the turntable away from the extension tube. The rotation of the turntable will drive the plurality of hooks to rotate.

[0009] A rotating groove is opened inside the fermentation barrel. The inside of the rotating groove is rotatably connected to the annular gear. A plurality of connecting tubes are fixedly connected to the bottom of the annular gear. The plurality of connecting tubes are arranged in a circular and evenly distributed manner along the annular gear. The function of the connecting tubes is to connect the annular gear and the cross bar.

[0010] One end of the connecting tube away from the annular gear is fixedly connected to a cross bar. A second servo motor is fixedly connected to the inside of the cross bar. The end of the output shaft of the second servo motor is fixedly connected to the threaded rod. The end of the output shaft of the second servo motor will drive the threaded rod to rotate.

[0011] The threaded rod and the moving block are in threaded connection. One end of the moving block away from the threaded rod is fixedly connected to the vertical rod. A contact groove is formed on the outer side of the vertical rod. On one side of the vertical rod close to the turntable, fixing blocks are symmetrically and fixedly connected. The rotation of the threaded rod will drive the moving block to move back and forth in the horizontal direction, and the movement of the moving block will drive the vertical rod to move back and forth in the horizontal direction.

[0012] A rotating shaft is rotatably connected between the opposite sides of the two groups of fixing blocks. The outer side of the rotating shaft is fixedly connected to the rolling and kneading roller. The size of the rolling and kneading roller is adapted to the size of the contact groove. One end of the vertical rod away from the cross bar is fixedly connected with an outer connecting pipe. The function of the rotating shaft is to connect the fixing block and the rolling and kneading roller. When the vertical rod moves back and forth in the horizontal direction, the rolling and kneading roller will contact the bacon on the outside of the hook.

[0013] A plurality of motors are fixedly connected to the bottom of the annular gear. The plurality of motors are evenly distributed in a fan shape along the annular gear. One end of the motor away from the annular gear is fixedly connected to the fan. One side of the motor close to the fan is fixedly connected to the first hollow tube. The rotation of the fan will send air to the inside of the first hollow tube.

[0014] One end of the first hollow tube away from the fan is fixedly connected to the second hollow tube. A plurality of air outlet pipes are jointly arranged on the first hollow tube and the second hollow tube. The function of the second hollow tube is to enable the air generated by the fan to be discharged from the inner bottom of the fermentation barrel. The plurality of air outlet pipes are linearly and evenly distributed along the first hollow tube and the second hollow tube respectively.

[0015] The present invention has the following beneficial effects: 0. In the present invention, by setting the rolling and kneading fermentation assembly, the gear drives the hook to drive the bacon to rotate at a constant speed, and the annular gear synchronously controls the threaded rod to push the rolling and kneading roller to reciprocate in the horizontal direction. This composite movement trajectory not only makes the fermentation liquid evenly adhere to the surface of the meat block by centrifugal force, but also promotes the relaxation of muscle fibers by the intermittent extrusion of the rolling and kneading roller, so that the fermentation liquid penetrates into the inside of the bacon, avoiding the limitation of traditional spraying and manual smearing only staying on the surface.

[0016] 1. In the present invention, further, by setting the ventilation promoting assembly, the wind driven by the fan forms a uniform air flow through the air outlet pipes, which not only accelerates the diffusion and penetration of the fermentation liquid on the surface of the bacon, but also realizes the "wind-assisted penetration" effect by the intermittent rolling pressure of the rolling and kneading assembly. The continuous air flow circulation promotes the renewal of oxygen in the fermentation barrel, creates an active environment for aerobic flora, accelerates the decomposition of proteins and the conversion of flavor precursor substances, and at the same time inhibits the growth of anaerobic spoilage bacteria. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a flavor bacon fermentation device with rolling and kneading and ventilation functions proposed by the present invention; Figure 2 This is a schematic structural diagram of the ventilation promotion component in the present invention; Figure 3 This is a schematic structural diagram of the tumbling and fermenting component in the present invention; Figure 4 This is a schematic bottom view structural diagram of the tumbling and fermenting component in the present invention; Figure 5 is Figure 2 An enlarged schematic diagram of the structure at position A in; Figure 6 is Figure 3 An enlarged schematic diagram of the structure at position B in; Figure 7 is Figure 4 An enlarged schematic diagram of the structure at position C in; Figure 8 is Figure 2 An enlarged schematic diagram of the structure at position D in.

[0018] In the figure: 1, fermentation barrel; 2, first servo motor; 3, main gear; 4, slave gear; 5, connecting rod; 6, extension pipe; 7, turntable; 8, hook; 9, rotating groove; 10, annular gear; 11, connecting pipe; 12, cross bar; 13, second servo motor; 14, threaded rod; 15, moving block; 16, vertical rod; 17, contact groove; 18, fixed block; 19, rotating shaft; 20, tumbling roller; 21, external connecting pipe; 22, motor; 23, fan; 24, first hollow pipe; 25, second hollow pipe; 26, air outlet pipe; 27, auxiliary rod; 28, movable door. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1 Such as Figures 1-8As shown in the figure, a flavor bacon fermentation device with tumbling and ventilation functions proposed by the present invention includes a fermentation barrel 1. Inside the fermentation barrel 1, a main gear 3, a slave gear 4, and an annular gear 10 are movably connected. The slave gear 4 and the annular gear 10 are meshed with the main gear 3 together. A tumbling fermentation assembly is arranged on the slave gear 4 and the annular gear 10 together. The tumbling fermentation assembly includes a turntable 7 movably connected to the slave gear 4, a plurality of hooks 8 arranged below the turntable 7, a threaded rod 14 movably connected to the annular gear 10, a plurality of vertical rods 16, and a tumbling roller 20 movably connected to the outside of the vertical rod 16. The bacon will be hung on the hooks 8. The rotation of the slave gear 4 will drive the turntable 7 and the hooks 8 to rotate simultaneously. The rotation of the main gear 3 will drive the annular gear 10 to rotate. The rotation of the threaded rod 14 will drive the vertical rod 16 to move back and forth in the horizontal direction. The back-and-forth movement of the vertical rod 16 will drive the tumbling roller 20 to tumble the bacon intermittently. A ventilation promoting assembly is arranged below the annular gear 10. The ventilation promoting assembly includes a fan 23 movably connected to the annular gear 10, a first hollow tube 24, and a plurality of air outlet pipes 26 arranged on the outside of the first hollow tube 24. The start of the fan 23 will send air to the inside of the first hollow tube 24, and the air will blow to the outside of the bacon from the air outlet pipes 26. An activity door 28 is movably connected to the outside of the fermentation barrel 1.

[0021] A first servo motor 2 is fixedly connected to the inside of the fermentation barrel 1. The end of the output shaft of the first servo motor 2 is fixedly connected to the main gear 3. The rotation of the output shaft of the first servo motor 2 will drive the main gear 3 to rotate.

[0022] A connecting rod 5 is rotatably connected to the top inside the fermentation barrel 1. The outside of the connecting rod 5 is fixedly connected to the slave gear 4. A extension tube 6 is fixedly connected to the side of the slave gear 4 away from the connecting rod 5. The end of the extension tube 6 away from the slave gear 4 is fixedly connected to the turntable 7. When the slave gear 4 rotates, it will drive the extension tube 6 and thus drive the turntable 7 to perform a circular motion.

[0023] One end of the turntable 7 away from the extension tube 6 is fixedly connected to a plurality of hooks 8. The plurality of hooks 8 are arranged in a circular and uniform distribution along the turntable 7. One end of the turntable 7 away from the extension tube 6 is fixedly connected to an auxiliary rod 27. The rotation of the turntable 7 will drive the plurality of hooks 8 to rotate.

[0024] A rotation groove 9 is opened inside the fermentation barrel 1. The inside of the rotation groove 9 is rotatably connected to the annular gear 10. A plurality of connecting tubes 11 are fixedly connected to the bottom of the annular gear 10. The plurality of connecting tubes 11 are arranged in a circular and uniform distribution along the annular gear 10. The function of the connecting tube 11 is to connect the annular gear 10 and the cross bar 12.

[0025] One end of the connecting pipe 11 away from the annular gear 10 is fixedly connected with a cross bar 12. A second servo motor 13 is fixedly connected to the inner side of the cross bar 12. The end of the output shaft of the second servo motor 13 is fixedly connected to the threaded rod 14, and the end of the output shaft of the second servo motor 13 drives the threaded rod 14 to rotate.

[0026] The threaded rod 14 is in threaded connection with the moving block 15. One end of the moving block 15 away from the threaded rod 14 is fixedly connected with a vertical rod 16. A contact groove 17 is formed on the outer side of the vertical rod 16. Fixing blocks 18 are symmetrically and fixedly connected to the side of the vertical rod 16 close to the turntable 7. The rotation of the threaded rod 14 drives the moving block 15 to move back and forth in the horizontal direction, and the movement of the moving block 15 drives the vertical rod 16 to move back and forth in the horizontal direction.

[0027] The opposite sides of the two groups of fixing blocks 18 are jointly rotatably connected with a rotating shaft 19. The outer side of the rotating shaft 19 is fixedly connected with a tumbling roller 20. The size of the tumbling roller 20 is adapted to the size of the contact groove 17. One end of the vertical rod 16 away from the cross bar 12 is fixedly connected with an external connecting pipe 21. The external connecting pipe 21 is connected to the fermentation broth. The function of the rotating shaft 19 is to connect the fixing block 18 and the tumbling roller 20. When the vertical rod 16 moves back and forth in the horizontal direction, the tumbling roller 20 makes the fermentation broth contact the bacon on the outer side of the hook 8.

[0028] In this embodiment, the specific implementation method is as follows: when in use, the cured meat needs to be placed on the hook 8 through the movable door 28, the movable door 28 is closed, and the first servo motor 2 inside the fermentation barrel 1 is started. When the first servo motor 2 is started, the rotation of the end of the output shaft of the first servo motor 2 will drive the main gear 3 to rotate. Since the main gear 3 and the driven gear 4 are meshed with each other, the rotation of the main gear 3 will drive the driven gear 4 to rotate, and the rotation of the driven gear 4 will drive the connecting rod 5 to rotate. The function of the connecting rod 5 is to connect the first servo motor 2 and the driven gear 4. When the driven gear 4 rotates, it will drive the extension tube 6 and thus drive the turntable 7 to perform a circular motion. The rotation of the turntable 7 will drive a plurality of hooks 8 to rotate, and the rotation of the hooks 8 will drive the cured meat to perform a circular motion. The first servo motor 2 and the annular gear 10 are meshed with each other, and the rotation of the first servo motor 2 will drive the annular gear 10 to rotate. A rotation groove 9 is provided inside the fermentation barrel 1, and the annular gear 10 can rotate inside the rotation groove 9. The function of the connecting pipe 11 is to connect the annular gear 10 and the cross bar 12. The second servo motor 13 is fixed inside the cross bar 12. When the second servo motor 13 is started, the end of the output shaft of the second servo motor 13 will drive the threaded rod 14 to rotate. Since the threaded rod 14 and the moving block 15 are threadedly connected, the rotation of the threaded rod 14 will drive the moving block 15 to move back and forth in the horizontal direction. The movement of the moving block 15 will drive the vertical rod 16 to move back and forth in the horizontal direction. The rotation of the annular gear 10 will drive the vertical rod 16 to perform a circular motion along the hook 8. The function of the fixed block 18 is to connect the vertical rod 16 and the rotating shaft 19, and the function of the rotating shaft 19 is to connect the fixed block 18 and the tumbling roller 20. When the vertical rod 16 moves back and forth in the horizontal direction, the tumbling roller 20 will come into contact with the cured meat outside the hook 8. The fermentation liquid is injected into the contact groove 17 through the external connection pipe 21. When the tumbling roller 20 rotates, it will adhere the fermentation liquid to the outside of the tumbling roller 20. The function of the auxiliary rod 27 is to assist the tumbling roller 20 to come into contact with the cured meat and at the same time provide support for the cured meat. When producing cured meat with pickled flavor, the brine needs to be mixed with the fermentation liquid and applied to the surface of the meat blocks, and then tumbling is carried out to pickle the meat in order to improve the quality and taste of the cured meat.

[0029] Embodiment Two As Figures 1-8 shown, based on Embodiment One, a plurality of motors 22 are fixedly connected to the bottom of the annular gear 10. The plurality of motors 22 are evenly distributed in a fan shape along the annular gear 10. One end of the motor 22 away from the annular gear 10 is fixedly connected to the fan 23, and one side of the motor 22 close to the fan 23 is fixedly connected to the first hollow tube 24. The rotation of the fan 23 will send air into the inside of the first hollow tube 24.

[0030] One end of the first hollow tube 24 away from the fan 23 is fixedly connected to a second hollow tube 25. A plurality of air outlet pipes 26 are jointly arranged on the first hollow tube 24 and the second hollow tube 25. The function of the second hollow tube 25 is to enable the air generated by the fan 23 to be discharged from the inner bottom of the fermentation barrel 1. The plurality of air outlet pipes 26 are linearly and uniformly distributed along the first hollow tube 24 and the second hollow tube 25 respectively.

[0031] In this embodiment, the specific implementation manner is that the rotation of the annular gear 10 drives the rotation of a plurality of motors 22. When the motor 22 is started, the rotation of the output shaft of the motor 22 drives the rotation of the fan 23. The rotation of the fan 23 generates a certain amount of air volume. The rotation of the fan 23 sends air to the inside of the first hollow tube 24. The function of the second hollow tube 25 is to enable the air generated by the fan 23 to be discharged from the inner bottom of the fermentation barrel 1. The air blows to the outside of the bacon, so that the air inside the fermentation barrel 1 can circulate.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flavor bacon fermentation device with tumbling and ventilation functions, including a fermentation barrel (1), characterized in that, Inside the fermentation barrel (1), a main gear (3), a driven gear (4), and an annular gear (10) are movably connected. The driven gear (4) and the annular gear (10) are meshed with the main gear (3) together. A tumbling and fermenting assembly is arranged on the driven gear (4) and the annular gear (10) together. The tumbling and fermenting assembly includes a turntable (7) movably connected to the driven gear (4), a plurality of hooks (8) arranged below the turntable (7), a threaded rod (14) movably connected to the annular gear (10), a plurality of vertical rods (16), and a tumbling roller (20) movably connected to the outside of the vertical rod (16). The bacon will be hung on the hooks (8). The rotation of the driven gear (4) will drive the turntable (7) and the hooks (8) to rotate simultaneously. The rotation of the main gear (3) will drive the annular gear (10) to rotate. The rotation of the threaded rod (14) will drive the vertical rod (16) to move back and forth in the horizontal direction. The back-and-forth movement of the vertical rod (16) will drive the tumbling roller (20) to tumble the bacon intermittently. A ventilation promoting assembly is arranged below the annular gear (10). The ventilation promoting assembly includes a fan (23) movably connected to the annular gear (10), a first hollow tube (24), and a plurality of air outlet pipes (26) arranged on the outside of the first hollow tube (24). The startup of the fan (23) will send air to the inside of the first hollow tube (24), and the air will blow to the outside of the bacon from the air outlet pipes (26). An activity door (28) is movably connected to the outside of the fermentation barrel (1).

2. The flavor bacon fermentation device with tumbling and ventilation functions according to claim 1, characterized in that, A first servo motor (2) is fixedly connected to the inside of the fermentation barrel (1). The end of the output shaft of the first servo motor (2) is fixedly connected to the main gear (3).

3. The flavor bacon fermentation device with tumbling and ventilation functions according to claim 1, characterized in that, A connecting rod (5) is rotatably connected to the inner top of the fermentation barrel (1). The outside of the connecting rod (5) is fixedly connected to the driven gear (4). A extension tube (6) is fixedly connected to the side of the driven gear (4) away from the connecting rod (5). One end of the extension tube (6) away from the driven gear (4) is fixedly connected to the turntable (7).

4. A flavor bacon fermentation device with tumbling and ventilation functions according to claim 1, characterized in that, One end of the turntable (7) away from the extension tube (6) is fixedly connected to a plurality of hooks (8). The plurality of hooks (8) are arranged in a circumferentially uniform distribution along the turntable (7). One end of the turntable (7) away from the extension tube (6) is fixedly connected to an auxiliary rod (27).

5. A flavor bacon fermentation device with tumbling and ventilation functions according to claim 1, characterized in that, A rotating groove (9) is formed in the inside of the fermentation barrel (1). The inside of the rotating groove (9) is rotatably connected to the annular gear (10). A plurality of connecting tubes (11) are fixedly connected to the bottom of the annular gear (10). The plurality of connecting tubes (11) are arranged in a circumferentially uniform distribution along the annular gear (10).

6. The flavor bacon fermentation device with tumbling and ventilation functions according to claim 5, characterized in that, One end of the connecting tube (11) away from the annular gear (10) is fixedly connected to a cross bar (12). A second servo motor (13) is fixedly connected to the inside of the cross bar (12). The end of the output shaft of the second servo motor (13) is fixedly connected to the threaded rod (14).

7. A flavor bacon fermentation device with tumbling and ventilation functions according to claim 1, characterized in that, The threaded rod (14) is threadedly connected to the moving block (15). One end of the moving block (15) away from the threaded rod (14) is fixedly connected to the vertical rod (16). A contact groove (17) is formed on the outer side of the vertical rod (16). On one side of the vertical rod (16) close to the turntable (7), fixing blocks (18) are symmetrically and fixedly connected.

8. A flavor bacon fermentation device with tumbling and ventilation functions according to claim 7, characterized in that, The opposite sides of the two groups of fixing blocks (18) are jointly rotatably connected to a rotating shaft (19). The outer side of the rotating shaft (19) is fixedly connected to the tumbling roller (20). The size of the tumbling roller (20) is adapted to the size of the contact groove (17). One end of the vertical rod (16) away from the cross bar (12) is fixedly connected to an external connecting pipe (21).

9. A flavor bacon fermentation device with tumbling and ventilation functions according to claim 1, characterized in that, A plurality of motors (22) are fixedly connected to the bottom of the annular gear (10). The plurality of motors (22) are evenly distributed in a fan shape along the annular gear (10). One end of the motor (22) away from the annular gear (10) is fixedly connected to a fan (23). One side of the motor (22) close to the fan (23) is fixedly connected to a first hollow pipe (24).

10. A flavor bacon fermentation device with tumbling and ventilation functions according to claim 1, characterized in that, One end of the first hollow pipe (24) away from the fan (23) is fixedly connected to a second hollow pipe (25). A plurality of air outlet pipes (26) are jointly arranged on the first hollow pipe (24) and the second hollow pipe (25). The plurality of air outlet pipes (26) are linearly and evenly distributed along the first hollow pipe (24) and the second hollow pipe (25) respectively.

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