Alcohol-based fuel mixing device

Abstract

The application relates to the technical field of fuel production equipment, in particular to an alcohol-based fuel mixing device which comprises a stirring tank provided with a feeding port and a discharging port, characterized in that the upper portion of the stirring tank is open, a rotating disc is rotationally connected to the upper portion of the stirring tank, a plurality of radial through grooves are arranged on the rotating disc, a first sliding block is slidably connected in each through groove, a hollow first rotating cylinder is fixedly connected to each first sliding block, a first linear driver is fixedly arranged on one side of each through groove, and the output end of each first linear driver is fixedly connected with the corresponding first sliding block. The first linear driver can drive the corresponding first sliding block to move close to or away from the inner wall of the stirring tank. The application can realize multi-directional dynamic injection of additives, multi-dimensional stirring of arc-shaped plates and convenient cleaning and maintenance, thereby improving the mixing efficiency and uniformity and facilitating equipment maintenance.

Description

Technical Field

[0001] This application relates to the technical field of fuel production equipment, and in particular to an alcohol-based fuel mixing device. Background Technology

[0002] Alcohol-based fuels, a new type of clean energy source with methanol, ethanol, and other alcohols as their main components, have been rapidly adopted in industrial boilers, household stoves, and motor vehicle power due to their advantages such as high combustion efficiency, low pollutant emissions, and wide availability. Their core performance characteristics, such as combustion stability, calorific value, and corrosion resistance, depend not only on the proportions of the basic raw materials but also on the uniform mixing of various additives with the raw materials during the production process. For example, combustion improvers can enhance combustion efficiency, stabilizers can extend the storage period, anti-gelling agents can adapt to low-temperature environments, and smoke suppressants can reduce harmful emissions. The dispersion effect of these additives directly affects the consistency of the final product's quality.

[0003] With the diversification of applications for alcohol-based fuels, different regions have varying requirements for the fuel's low-temperature fluidity and antifreeze properties, further increasing the demands on the mixing precision of additives. For example, alcohol-based fuels used in cold regions require a higher proportion of anti-gelling agents. Uneven mixing can lead to some fuels stratifying and solidifying at low temperatures, severely impacting safety. Furthermore, some additives are crystalline, easily crystallizing on the inner wall of the mixing tank and the surface of the mixing components when the mixing system temperature decreases or the solvent evaporates. For instance, alcohol-based fuels used in cold regions require a higher proportion of anti-gelling agents, which are more prone to crystallization and residue when temperatures change. This results in existing mixing devices having fuel residue and additive crystals remaining on the inner wall of the mixing tank and the mixing components after long-term use. Cleaning and maintenance require disassembling numerous components, which is not only time-consuming and labor-intensive but may also affect subsequent mixing precision due to assembly errors.

[0004] A search revealed Chinese Patent Publication No. CN119034531B, which discloses a mixing device for sustainable aviation fuel. The device includes a shaft rotatably mounted inside a container. Multiple mixing components are arranged sequentially from top to bottom inside the container. Each mixing component includes an inner ring, an outer ring, and a mixing element fixed between the outer side of the inner ring and the inner side of the outer ring. The mixing element has a material chamber for loading a catalyst. Two baffles are slidably mounted on the mixing element. A rack is slidably mounted on the inner ring to cooperate with the baffles on the mixing element. A drive rod is slidably mounted on the shaft, and the drive rod has a drive component corresponding to each mixing component.

[0005] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: Existing traditional mixing devices employ a static injection + single-point stirring mode. Additives are injected through a fixed pipe from a single location on the top or side wall of the mixing tank, and mixing is then achieved by the rotation of the stirring paddle. This mode has significant limitations: firstly, after injection from a single point, the additive needs to undergo a long diffusion path to fully integrate with the raw materials, easily forming localized high-concentration areas; secondly, the unidirectional stirring paddle is insufficient to break the laminar flow of the raw materials, especially in high-viscosity systems, easily creating dead zones in the stirring, leading to uneven additive dispersion. This necessitates extending the stirring time to compensate for these defects, indirectly reducing production efficiency. Summary of the Invention

[0006] To improve the mixing efficiency of additives, this application provides an alcohol-based fuel mixing device.

[0007] This application provides an alcohol-based fuel mixing device, employing the following technical solution: It includes a mixing tank with an inlet and an outlet, characterized in that: the mixing tank has an upper opening, and a rotating disk is rotatably connected to the upper part of the mixing tank; the rotating disk has a plurality of radially arranged through slots, each through slot having a first sliding block slidably connected therein, and each first sliding block being fixedly connected to a hollow first rotating cylinder; the outer wall of each first rotating cylinder has a plurality of spray pipes radially arranged, communicating with the inner cavity of the first rotating cylinder, and the spray pipes have a plurality of nozzles; each first sliding block... The block is also rotatably connected to a first sleeve. A radial rod is fixedly installed on the lower end face of the first sleeve, and a vertical rod is fixedly installed on the radial rod. Multiple arc-shaped plates are installed on the vertical rod from top to bottom. Each arc-shaped plate is inclined and can rotate around the axis of the first sleeve or revolve around the axis of the mixing tank. A first linear actuator is fixedly installed on one side of each through-slot, and the output end of each first linear actuator is fixedly connected to the corresponding first sliding block. The first linear actuator can drive the corresponding first sliding block to move closer to or away from the inner wall of the mixing tank. By spraying the additive from nozzles at different heights and positions, the mixing efficiency of the additive is improved. At this time, the arc-shaped plates perform planetary motion, disturbing the medium in the mixing tank in multiple directions, avoiding excessive additive in some areas or uneven mixing. At the same time, when the first linear actuator drives the corresponding first sliding block to move closer to the inner wall of the mixing tank, the arc-shaped plate revolves, scraping and cleaning the scale on the inner wall of the mixing tank.

[0008] Optionally, a placement frame is fixedly provided on the upper part of the mixing tank, and a first gear coaxial with the mixing tank is fixedly provided on the placement frame.

[0009] Optionally, each of the first sleeves is coaxially fixedly provided with a second gear capable of meshing with the first gear. The first gear meshes with the second gear, driving the first sleeve to rotate.

[0010] Optionally, a transmission rod is coaxially fixed on the upper end face of the rotating disk, and a through hole for the transmission rod is provided on both the first gear and the placement frame.

[0011] Optionally, a motor is fixedly mounted on the placement frame, and a first bevel gear is fixedly mounted coaxially on the output shaft of the motor; a second bevel gear that meshes with the first bevel gear is fixedly mounted coaxially on the transmission rod.

[0012] Optionally, a sliding frame is fixedly provided at the lower part of the mixing tank, and a plurality of second sliding grooves are provided on the sliding frame; a second sliding block is slidably connected in each second sliding groove.

[0013] Optionally, a second rotating cylinder is coaxially rotatably disposed inside the first rotating cylinder, and a second through groove is provided on the side wall of the second rotating cylinder; the second rotating cylinder is rotatably connected to the corresponding second sliding block.

[0014] Optionally, a conveying pipe extending to the outside of the mixing tank is fixedly installed on the sliding frame; one end of the conveying pipe located outside the mixing tank is selectively connected to an additive storage tank or a cleaning solution storage tank via a conveying pump.

[0015] Optionally, each of the second sliding blocks is fixedly provided with an elbow that communicates with the inner cavity of the corresponding first rotating cylinder, and the other end of the elbow is connected to the conveying pipe through a flexible hose.

[0016] Optionally, the second rotating cylinder is fixedly connected to the corresponding vertical rod.

[0017] In summary, this application includes the following beneficial technical effects:

[0018] 1. The additive of the present invention is sprayed out through multiple nozzles of different heights. With the revolution of the rotating disk, the additive can be sprayed into the mixing tank in an all-round and dynamic manner, avoiding the problem of excessively high or uneven local concentration caused by injection at a single position. This allows the additive to be mixed more fully with the raw materials, thereby improving the mixing efficiency.

[0019] 2. The arc-shaped plate of this invention revolves with the rotating disk and also rotates on its own axis due to gear meshing. Furthermore, the arc-shaped plate is inclined, creating multi-directional pushing of the raw materials during rotation, promoting material flow and further enhancing the mixing effect. Simultaneously, the second rotating cylinder ensures that the medium inside the first rotating cylinder can only pass through the second passageway to the nozzle, allowing the stirred medium to be sprayed only from the nozzle corresponding to the arc-shaped plate. This ensures that the medium sprayed from the nozzle is completely dispersed by the arc-shaped plate, resulting in a better mixing effect.

[0020] 3. The delivery pipe of the present invention can be connected to the cleaning fluid storage tank via a delivery pump. The cleaning fluid can be sprayed out through nozzles to clean the inside of the device. When cleaning the inner wall of the mixing tank, the first linear actuator can drive the arc-shaped plate to adhere to the inner wall of the mixing tank. The rotating disk drives the arc-shaped plate to revolve, which can scrape the inner wall of the mixing tank. Combined with the directional spraying of the cleaning fluid, the cleaning effect of the inner wall is improved. The arc-shaped plate can also rotate on its own axis, and under the action of the second rotating cylinder, the cleaning fluid can always be sprayed towards the arc-shaped plate to rinse the arc-shaped plate itself. At the same time, the rotation of the arc-shaped plate can also turbulent the cleaning fluid sprayed from the nozzles, so that the first rotating cylinder can be turbulently cleaned, thereby achieving the effect of saving cleaning fluid and facilitating the cleaning and maintenance of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the transmission relationship in an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the structure of the first rotating cylinder and the arc-shaped plate in the embodiments of this application;

[0024] Figure 4 This is a structural schematic diagram of the first rotating cylinder and the arc plate from another perspective in the embodiments of this application;

[0025] Figure 5 This is a schematic diagram of the sliding frame structure in an embodiment of this application;

[0026] Figure 6 This is a structural schematic diagram of the sliding frame from another perspective in an embodiment of this application;

[0027] Figure 7 This is a schematic diagram of the structure of the second rotating cylinder in an embodiment of this application.

[0028] Reference numerals: 1. Mixing tank; 11. Inlet; 12. Outlet; 2. Rotating disc; 21. Through groove; 22. Transmission rod; 23. Second bevel gear; 3. Placement frame; 31. First gear; 4. First linear actuator; 41. First sliding block; 5. First rotating cylinder; 51. Spray pipe; 511. Nozzle; 6. First sleeve; 61. Radial rod; 62. Vertical rod; 63. Arc plate; 64. Second gear; 65. Second rotating cylinder; 651. Second through groove; 7. Motor; 71. First bevel gear; 8. Sliding frame; 81. Second sliding groove; 82. Second sliding block; 9. Conveying pipe; 91. Elbow; 92. Hose. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-7This application will be further described in detail below. The technical solutions in the embodiments of this application will be clearly described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0030] This application discloses an alcohol-based fuel mixing device. For example... Figure 1 As shown, the alcohol-based fuel mixing device of this application includes a mixing tank 1, which is a cylindrical tank with an open top. The upper part of its side wall is provided with a feed port 11 (for introducing the basic raw materials of alcohol-based fuel), and the bottom center of the mixing tank 1 is provided with a discharge port 12 (for discharging the mixed fuel). The upper part of the mixing tank 1 is rotatably connected to a rotating disk 2 (coaxially arranged with the mixing tank 1) through a bearing. A sliding frame 8 is fixed in the lower part of the tank, and a placement frame 3 is fixed in the top. All components work together to achieve efficient mixing of raw materials and additives.

[0031] like Figure 1 , Figure 2 As shown, a plurality of through slots 21 are evenly arrayed along the circumference of the rotating disk 2 (the number of through slots 21 can be adjusted according to the size of the mixing tank 1). Each through slot 21 is arranged radially along the rotating disk 2. A first sliding block 41 is slidably connected in each through slot 21 through a slide rail slider structure. A first linear actuator 4 (electric push rod in this embodiment) is fixed on the side of the through slot 21 near the center of the rotating disk 2. Its output end is fixedly connected to the first sliding block 41, which can drive the first sliding block 41 to slide radially along the through slot 21.

[0032] Each first sliding block 41 is fixedly connected to a hollow first rotating cylinder 5 (vertically arranged in the axial direction). Multiple nozzles 51 are welded to the outer wall of the first rotating cylinder 5 at intervals along the axial direction. The nozzles 51 are connected to the inner cavity of the first rotating cylinder 5, and multiple nozzles 511 are opened on the inner wall of the nozzles 51 facing the mixing tank 1 for spraying additives or cleaning liquid into the tank.

[0033] like Figure 3 , Figure 4 As shown, the lower end of each first sliding block 41 is rotatably connected to a first sleeve 6 (sleeved on the outside of the first rotating cylinder 5 and coaxial with the first rotating cylinder 5) via a bearing. A radial rod 61 (extending in the horizontal direction) is welded to the lower end face of the first sleeve 6. A vertical rod 62 (extending in the vertical direction) is welded to the end of the radial rod 61 away from the first sleeve 6. Multiple arc-shaped plates 63 are welded on the vertical rod 62 from top to bottom. Each arc-shaped plate 63 is inclined in the same direction, and the lower part of the upper arc-shaped plate 63 is flush with the upper part of the lower arc-shaped plate 63 on the adjacent first rotating cylinder 5. The outer arc-shaped contour of the arc-shaped plate 63 is adapted to the curvature of the inner wall of the mixing tank 1, which facilitates the scraping of the inner wall residue.

[0034] like Figure 1 , Figure 2 As shown, the placement frame 3 is an annular support fixed to the upper edge of the mixing tank 1. A first gear 31 (coaxial with the mixing tank 1) is fixed on its inner side; a second gear 64 is coaxially fixed on the outer wall of each first sleeve 6. The second gear 64 and the first gear 31 mesh intermittently (the first linear actuator 4 drives the first sliding block 41 to move the first rotating cylinder 5 toward the first gear 31, so that the second gear 64 meshes with the first gear 31. When the rotating disk 2 drives the first sleeve 6 to revolve, the second gear 64 rolls along the first gear 31, drives the first sleeve 6 to rotate, and drives multiple arc plates 63 to rotate).

[0035] A transmission rod 22 is coaxially welded to the center of the upper end face of the rotating disk 2. A through hole (the hole diameter is larger than the diameter of the transmission rod 22, allowing the transmission rod 22 to pass through and rotate) is opened at the center of the first gear 31 and the placement frame 3. A motor 7 is fixed to the upper end face of the placement frame 3 through a motor base. A first bevel gear 71 is coaxially welded to the output shaft of the motor 7. A second bevel gear 23 is coaxially welded to the upper end of the transmission rod 22. The first bevel gear 71 and the second bevel gear 23 mesh (when the motor 7 starts, it drives the transmission rod 22 to rotate through the bevel gear transmission, thereby driving the rotating disk 2 to rotate).

[0036] like Figure 6 , Figure 5 As shown, a second rotating cylinder 65 is coaxially rotatably arranged inside the first rotating cylinder 5, and a second through groove 651 is provided on the side wall of the second rotating cylinder 65; the second rotating cylinder 65 is rotatably connected to the corresponding second sliding block 82; the second rotating cylinder 65 is fixedly connected to the corresponding vertical rod 62.

[0037] By setting the second rotating cylinder 65, the medium in the first rotating cylinder 5 can only pass through the second through groove 651 to the nozzle, so that the agitated medium can only be sprayed out from the nozzle 511 in the corresponding direction of the arc plate 63, so that the medium sprayed out by the nozzle 511 can be completely dispersed by the arc plate 63, thereby improving the agitation effect; at the same time, during cleaning, the cleaning medium can only be sprayed in the direction of the arc plate 63, thereby improving the cleaning effect and reducing the use of cleaning medium.

[0038] like Figure 6 , Figure 5 As shown, an annular sliding frame 8 is welded to the lower inner wall of the mixing tank 1. Multiple second sliding grooves 81 are provided on the sliding frame 8 along the circumference (corresponding one-to-one with the through grooves 21 of the rotating disk 2, and arranged radially). A second sliding block 82 is slidably connected in each second sliding groove 81 through a slide rail slider structure. The upper end of the second sliding block 82 is rotatably connected to the lower end of the second rotating cylinder 65 through a bearing (to ensure that the second rotating cylinder 65 remains stable during radial sliding and rotation, and to avoid shaking).

[0039] like Figure 5 As shown, a conveying pipe 9 (made of rigid plastic pipe) is fixed on the sliding frame 8. One end of the conveying pipe 9 extends along the inner side of the sliding frame 8, and the other end extends through the side wall of the mixing tank 1 to the outside. The end of the conveying pipe 9 located outside the tank is connected to a conveying pump (not shown in the figure) through a flange. The input end of the conveying pump can be selectively connected to an additive storage tank or a cleaning liquid storage tank (switched by a valve).

[0040] Each second sliding block 82 is fixed with an elbow 91. One end of the elbow 91 is connected to the inner cavity of the first rotating cylinder 5 (connected by a rotary joint to ensure that the rotation of the first rotating cylinder 5 does not affect the liquid delivery), and the other end is connected to the delivery pipe 9 through a hose 92 (oil-resistant rubber hose) (the length of the hose 92 is adapted to the sliding stroke of the second sliding block 82).

[0041] The implementation principle of an alcohol-based fuel mixing device according to an embodiment of this application is as follows:

[0042] Example 1: Add alcohol-based fuel base material into the mixing tank 1 through the feed inlet 11, start the motor 7, the motor 7 drives the transmission rod 22 to rotate through the first bevel gear 71 and the second bevel gear 23, and the transmission rod 22 drives the rotating disk 2 to revolve around the axis of the mixing tank 1.

[0043] When the rotating disk 2 revolves, it drives the first rotating cylinder 5 and the first sleeve 6 to revolve synchronously. At the same time, the second gear 64 on the first sleeve 6 meshes with the fixed first gear 31, driving the first sleeve 6 to rotate, which in turn drives the radial rod 61, the vertical rod 62 and the arc plate 63 to both revolve and rotate. The arc plate 63 is inclined and forms multi-directional pushing and shearing on the raw material during the rotation, promoting the flow of the raw material.

[0044] The delivery pump is started, and the additives (such as combustion improvers, stabilizers, etc.) are sent into the inner cavity of the first rotating cylinder 5 through the delivery pipe 9, hose 92, and elbow 91. Then, through the guiding effect of the second through groove 651, the additives are sprayed out from the nozzle 511 on the spray pipe 51 in the corresponding direction of the arc plate 63. With the revolution of the rotating disk 2 and the dispersing effect of the rotation of the arc plate 63, the additives are sprayed into the tank in an all-round and dynamic manner, avoiding excessive local concentration. After mixing is completed, the discharge port 12 is opened to discharge the fuel.

[0045] Example 2: When cleaning is required, the delivery pump is switched to the cleaning fluid storage tank, and the cleaning fluid is sprayed out through the nozzle 511. At the same time, the first linear driver 4 drives the first sliding block 41 to slide radially outward along the through groove 21, causing the first rotating cylinder 5 to move away from the center of the mixing tank 1, so that the outer wall of the arc plate 63 is in contact with the inner wall of the mixing tank 1. The rotating disk 2 drives the arc plate 63 to revolve, so that the outer wall of the arc plate 63 scrapes the inner wall of the mixing tank 1. At the same time, the cleaning fluid is sprayed out from the nozzle 511 on the spray pipe 51 in the corresponding direction of the arc plate 63. With the revolution of the rotating disk 2 and the scraping of the inner wall of the mixing tank 1 by the outer wall of the arc plate 63, the cleaning effect of the arc plate 63 on the scale on the inner wall of the mixing tank is better.

[0046] To ensure that the outer wall of the arc plate 63 fits against the inner wall of the mixing tank 1, the motor 7 is a servo motor, a first sensor is installed on the rotating disk 2, a second sensor is installed on the radial rod 61, and a controller is installed on the mixing tank 1. The controller is electrically connected to the first sensor, the second sensor, the first linear driver 4, and the motor 7. In the initial position, the first sensor and the second sensor coincide on the same vertical horizontal plane, and at this time, the outer wall of the arc plate 63 can fit against the inner wall of the mixing tank 1. When cleaning is required, the motor 7 gradually decelerates. When the first sensor and the second sensor coincide on the same vertical horizontal plane, the controller sends a braking signal to the motor 7. After the motor 7 stops rotating, the controller sends a signal to the first linear driver 4, causing the first linear driver 4 to drive the first sliding block 41 to slide outward along the through groove 21 until the outer wall of the arc plate 63 fits against the inner wall of the mixing tank 1.

[0047] Example 3: After the inner wall of the mixing tank 1 is scraped off, the first linear actuator 4 drives the first sliding block 41 to slide radially inward along the through groove 21, so that the first gear 31 meshes with the second gear 64, driving the first sleeve 6 to rotate and causing the corresponding arc plate 63 to rotate. At the same time, the first sleeve 6 drives the second sleeve to rotate, so that the second through groove 651 can always face the arc plate 63, so that the cleaning liquid sprayed from the nozzle 511 can always face the arc plate 63 and rinse the arc plate 63, achieving the effect of reducing and saving cleaning liquid.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An alcohol-based fuel mixing device, comprising a mixing tank (1) having an inlet (11) and an outlet (12), characterized in that: The mixing tank (1) has an opening at the top, and a rotating disk (2) is rotatably connected to the top of the mixing tank (1). The rotating disk (2) has multiple radially arranged through slots (21), each through slot (21) having a first sliding block (41) slidably connected to it. Each first sliding block (41) is fixedly connected to a hollow first rotating cylinder (5). The outer wall of each first rotating cylinder (5) has multiple spray pipes radially arranged, communicating with the inner cavity of the first rotating cylinder (5), and multiple nozzles (511) are provided on the spray pipes. Each first sliding block (41) is also rotatably connected to a first sleeve (6), and a radial rod (61) is fixedly provided on the lower end face of the first sleeve (6), with a vertical rod (62) fixedly provided on the radial rod (61). The vertical rod (62) is provided with multiple arc-shaped plates (63) from top to bottom; each arc-shaped plate (63) is inclined and can rotate around the axis of the first sleeve (6) or revolve around the axis of the stirring tank; a first linear actuator (4) is fixedly provided on one side of each through groove (21), and the output end of each first linear actuator (4) is fixedly connected to the corresponding first sliding block (41); the first linear actuator (4) can drive the corresponding first sliding block (41) to approach or move away from the inner wall of the stirring tank (1); a placement rack (3) is fixedly provided on the upper part of the stirring tank (1), and a first gear (31) coaxial with the stirring tank (1) is fixedly provided on the placement rack (3). Each of the first sleeves (6) is coaxially fixed with a second gear (64) that can mesh with the first gear (31); a transmission rod (22) is coaxially fixed on the upper end face of the rotating disk (2), and the first gear (31) and the placement frame (3) are both provided with through holes for the transmission rod (22); a motor (7) is fixedly mounted on the placement frame (3), and a first bevel gear (71) is coaxially fixed on the output shaft of the motor (7); a second bevel gear (23) that meshes with the first bevel gear (71) is coaxially fixed on the transmission rod (22); a sliding frame (8) is fixedly mounted on the lower part of the mixing tank (1), and multiple second sliding grooves (81) are provided on the sliding frame (8); each second sliding groove... The groove (81) is slidably connected with a second sliding block (82); the first rotating cylinder (5) is coaxially rotatably arranged with a second rotating cylinder (65), and the side wall of the second rotating cylinder (65) is provided with a second passage groove (651). The second rotating cylinder (65) is fixedly connected with the corresponding vertical rod (62). By setting the second rotating cylinder (65), the medium in the first rotating cylinder (5) can only pass through the second passage groove (651) to the nozzle, so that the stirred medium can only be sprayed out from the nozzle (511) in the corresponding direction of the arc plate (63); the second rotating cylinder (65) is rotatably connected with the corresponding second sliding block (82); the sliding frame (8) is fixedly provided with a conveying pipe (9) extending to the outside of the mixing tank (1).One end of the delivery pipe (9) located outside the mixing tank (1) is selectively connected to the additive storage tank or the cleaning liquid storage tank via a delivery pump; each of the second sliding blocks (82) is fixedly provided with an elbow (91) communicating with the inner cavity of the corresponding first rotating cylinder (5), and the other end of the elbow (91) is connected to the delivery pipe (9) via a hose (92).

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