Metering and feeding device for solid particles

Abstract

The utility model discloses a metering and feeding device for solid particles. The metering and feeding device comprises a tank body, the stirring assembly comprises a motor, a rotating shaft, stirring blades and a push rod, the rotating shaft is connected to the motor, and the stirring blades and the push rod are connected to the rotating shaft; the weighing and discharging assembly comprises a storage tank, a bearing plate, a weighing module and a positioning frame, a feeding pipe is arranged at the bottom of the storage tank, an electromagnetic valve is arranged in the feeding pipe, the weighing module is arranged on the bearing plate and arranged under the feeding port, and the projection of the positioning frame on the weighing module is located in the weighing plane of the weighing module. The bottom of the positioning frame is provided with a discharging notch part used for giving way to the push rod, the push rod and the discharging notch part are located at the same horizontal height, and the discharging notch part is provided with a brush. According to the utility model, various solid particle materials can be metered and mixed, the processing efficiency is high, the weighing and metering accuracy is high, and the materials on the weighing plane can be pulled out and dropped in batches through multi-circle rotation of the push rod.

Description

Technical Field

[0001] The utility model relates to the technical field of solid particle feeding, in particular to a solid particle metering feeding device. Background Art

[0002] In industries such as plastic preparation and chemical product manufacturing, raw materials need to be measured before production, and then a specified amount of raw materials needs to be put into the preparation equipment for preparation and production.

[0003] In the related art, before the raw materials of solid particles are put into production, they are weighed and measured manually using weighing equipment such as electronic scales, and then the raw materials are transported to the target area manually or in combination with simple mechanical devices for further production and processing. This weighing and feeding method relies on manual operation, and there are problems such as inaccurate measurement and low feeding efficiency. These problems are particularly prominent for processes that require multiple raw materials to be mixed in proportion. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a solid particle metering feeding device that can weigh and feed a variety of materials, has a compact structure, accurate metering, and high feeding efficiency.

[0005] A solid particle metering device according to an embodiment of the present invention includes:

[0006] The tank body has a feed inlet and a discharge inlet at the top and bottom, respectively, and at least two feed inlets are provided;

[0007] The stirring assembly includes a motor, a rotating shaft, a stirring blade and a push rod. The rotating shaft and the stirring blade are both arranged in the tank body. The rotating shaft is connected to the motor and is rotatably connected to the tank body. The stirring blade and the push rod are both connected to the rotating shaft. The stirring blade is located below the push rod.

[0008] Weighing and unloading components, the number of weighing and unloading components is equal to the number of feed ports, the weighing and unloading components include a storage tank, a support plate, a weighing module and a positioning frame, the storage tank is connected to the tank body, a feeding pipe is provided at the bottom of the storage tank, a solenoid valve is provided in the feeding pipe, the bottom of the feeding pipe is connected to the feeding port, the support plate is connected to the tank body, the weighing module is provided on the support plate, the weighing module is provided directly below the feeding port, the positioning frame is connected to the weighing plane of the weighing module, the projection of the positioning frame on the weighing module is located in the weighing plane of the weighing module, the bottom of the positioning frame is provided with a discharge notch for making way for the push rod, the push rod and the discharge notch are at the same horizontal height, the weighing plane of the weighing module is provided under the movement path of the push rod, the discharge notch is provided with a brush, the top of the brush is connected to the bottom surface of the positioning frame, and the bottom end of the brush abuts against the weighing plane of the weighing module.

[0009] In this embodiment, the side of the positioning frame away from the rotating shaft is an arc plate, the center of the arc plate is located at the rotating shaft, and the length of the push rod is equal to the arc radius of the arc plate.

[0010] In this embodiment, the number of push rods is equal to the number of weighing and unloading components, all push rods are evenly distributed around the rotating shaft, and all weighing and unloading components are evenly distributed around the rotating shaft.

[0011] In this embodiment, the bottom of the push rod is a scraper portion that narrows downward, and the extension direction of the scraper portion is parallel to the push rod.

[0012] In this embodiment, four discharge ports and four weighing and unloading components are provided.

[0013] In this embodiment, a plurality of stirring blades are provided, and each stirring blade is located below the supporting plate.

[0014] In this embodiment, the stirring blade includes a horizontal rod and a vertical rod. One end of the horizontal rod is connected to the rotating shaft, and the other end of the horizontal rod is connected to the vertical rod. The vertical rod is located on one side of the inner wall of the tank body.

[0015] In this embodiment, the shape of the longitudinal rod matches the shape of the inner wall of the tank.

[0016] The embodiments of the present invention have at least the following beneficial effects:

[0017] Through multiple sets of weighing and discharging components in conjunction with stirring components, a variety of solid particulate materials can be measured and mixed. It has a compact structure and strong functionality. When used to feed equipment such as plastic extruders, it can obtain accurate measurement and pre-mixed feeding effects, and can provide a good processing basis for the production steps after feeding, thereby improving the quality and efficiency of production and processing effects. Each feed port is equipped with a corresponding weighing and discharging component, which can simultaneously achieve weighing and discharging of a variety of solid particulate materials, with high processing efficiency and high weighing and metering accuracy. The stirring component can also effectively ensure the falling fluidity of the solid particulate material and ensure smooth and stable feeding action. In addition, the positioning frame is combined with the weighing plane of the weighing module to form a temporary weighing space for accommodating solid particulate materials, which is not affected by other The brush under the action of external force can effectively limit the position of the solid particulate material on the weighing plane. After weighing is completed, the motor drives the shaft to rotate, and the push rod and stirring blades follow the shaft to rotate. The push rod rotates through the discharge notch to push the solid particulate material on the weighing plane and push the brush to bend. The bent brush makes way for the solid particulate material, and the solid particulate material is pushed away from the weighing plane from the discharge notch and falls to the bottom of the tank. At the same time, the stirring blade rotates to stir and mix the solid particulate material in the tank. The push rod rotates symmetrically for multiple weeks to push and drop the material on the weighing plane in batches. The synchronously rotating stirring blades can not only form a uniform stirring and mixing effect, but also the solid particulate material is pushed circumferentially, which can further improve the uniformity of the mixing effect and effectively improve the continuous and stable feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a solid particle metering and feeding device according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of a solid particle metering device according to an embodiment of the present utility model;

[0021] Figure 3 for Figure 2 A schematic diagram of the partially enlarged structure of the middle part;

[0022] Figure 4 This is a schematic top view of the solid particle metering and feeding device according to an embodiment of the present utility model in another working state;

[0023] Figure 5 For the Figure 4 Schematic diagram of the cross-sectional structure of B-B'.

[0024] Reference numerals:

[0025] Tank body 100, feed port 110, discharge port 120;

[0026] Stirring assembly 200, motor 210, rotating shaft 220, stirring blade 230, horizontal rod 231, vertical rod 232, push rod 240, scraper 241;

[0027] Weighing and unloading assembly 300 , storage tank 310 , feeding pipe 311 , solenoid valve 312 , supporting plate 320 , weighing module 330 , positioning frame 340 , discharge notch 341 , and brush 342 . DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of this utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] In the chemical, food, and pharmaceutical industries, raw materials need to be measured before production, and then a specified amount of raw materials is put into the preparation device for preparation and production. In the related art, before the solid particle raw materials are put into the raw materials, they are weighed and measured manually using weighing equipment such as electronic scales, and then transported to the target area manually or in combination with simple mechanical devices for further production and processing. This weighing and feeding method relies on manual operation, and there are problems such as inaccurate measurement, low feeding efficiency, and easy material contamination. In addition, each operation requires a separate space, which takes up a lot of space and has high land costs. These problems are particularly prominent for processes that require multiple raw materials to be mixed in proportion.

[0033] Some existing metering and feeding devices attempt to achieve precise metering through weighing systems, but these often suffer from issues such as irrational structural design, clogging, high maintenance costs, and low automation. This is particularly true when processing solid particles that are prone to agglomeration and have poor flowability. Furthermore, multi-feed port designs often lack effective coordinated control mechanisms, leading to imbalanced feed ratios and compromising final product quality.

[0034] The following reference Figure 1 To the attached Figure 5 , describing the solid particle metering feeding device of the embodiment of the utility model, which can weigh and feed a variety of materials, has a compact structure, accurate metering and high feeding efficiency.

[0035] Reference Figures 1 to 5 A solid particle metering device according to an embodiment of the present invention comprises:

[0036] The tank body 100 has a feed port 110 and a discharge port 120 at the top and bottom, respectively, and at least two feed ports 110 are provided;

[0037] The stirring assembly 200 includes a motor 210, a rotating shaft 220, a stirring blade 230 and a push rod 240. The rotating shaft 220 and the stirring blade 230 are both arranged in the tank body 100. The rotating shaft 220 is coaxially fixedly connected to the drive shaft of the motor 210. The rotating shaft 220 is rotatably connected to the tank body 100. The motor 210 is connected to the outside of the tank body 100. The stirring blade 230 and the push rod 240 are both fixedly connected to the rotating shaft 220. The stirring blade 230 is located below the push rod 240 to ensure the control accuracy of the solid particles in each step. The motor 210 is used to drive the rotating shaft 220 to rotate so that the stirring blade 230 stirs and mixes the material in the tank body 100. When used in an extruder, the discharge port 120 of the tank body 100 is connected to the material inlet of the extruder. The stirring assembly 200 can achieve a pre-stirring and mixing effect on the material in the tank body 100.

[0038] The weighing and discharging assembly 300 is provided with multiple groups, and the number of the weighing and discharging assemblies 300 is equal to the number of the feed ports 110. The weighing and discharging assembly 300 is provided with at least two groups, and the position of each weighing and discharging assembly 300 corresponds one-to-one to the position of each feed port 110. The weighing and discharging assembly 300 includes a storage tank 310, a supporting plate 320, a weighing module 330 and a positioning frame 340. The storage tank 310 is connected to the tank body 100. A feeding pipe 311 is provided at the bottom of the storage tank 310. The internal space of the feeding pipe 311 is connected to the internal space of the storage tank 310. A solenoid valve 312 is provided in the feeding pipe 311. The solenoid valve 312 can control the pipeline on and off of the feeding pipe 311 to control the solid in the storage tank 310. The solid particulate material falls or remains still, the bottom of the feeding pipe 311 is connected to the feeding port 110, the top of the feeding pipe 311 is connected to the storage tank 310, the supporting plate 320 is fixedly connected to the tank body 100, and the weighing module 330 is arranged on the supporting plate 320. The weighing module 330 can be an electronic scale, and the machine platform of the electronic scale is fixed on the supporting plate 320. The weighing module 330 is arranged just below the feeding port 110 so that the solid particulate material falling from the feeding pipe 311 in the storage tank 310 can reach the weighing plane of the weighing module 330. The weighing module 330 is used to weigh and measure objects on the weighing plane. The positioning frame 340 is fixedly connected to the weighing plane of the weighing module 330. The positioning frame 340 can be used to weigh the objects on the weighing plane of the weighing module 330. The solid particulate material on the surface is limited, which can effectively ensure the reliability of the weighing and metering action. The projection of the positioning frame 340 on the weighing module 330 is located in the weighing plane of the weighing module 330, that is, the area surrounded by the positioning frame 340 is smaller than the area of ​​the weighing plane of the weighing module 330, and the outline of the weighing plane positioning frame 340 can be completely projected onto the weighing plane of the weighing module 330, which can ensure that the positioning frame 340 can achieve a reliable positioning effect for the solid particulate material on the weighing plane of the weighing module 330. Before weighing, the weighing module 330 is first cleared to eliminate the influence of the weight of the positioning frame 340. The bottom of the positioning frame 340 is provided with a discharge notch 341 for making way for the push rod 240. The discharge notch 341 is located at the bottom of the weighing module 330. On the side of the bottom of the positioning frame 340 close to the rotating shaft 220, the push rod 240 and the discharge notch 341 are at the same horizontal height, and the weighing plane of the weighing module 330 is set under the movement path of the push rod 240. The movement path of the push rod 240 passes through the discharge notch 341, so that the push rod 240 can push and scrape the solid particulate material on the weighing plane through the discharge notch 341. The discharge notch 341 is provided with a brush 342, the top of the brush 342 is fixedly connected to the bottom surface of the positioning frame 340, and the bottom end of the brush 342 abuts against the weighing plane of the weighing module 330. The extension direction of the brush 342 is perpendicular to the push rod 240, so that the push rod 240 can move the brush 342 to bend to one side and make way for the discharge of the solid particulate material.It can ensure that solid granular materials can be smoothly pushed out and dropped.

[0039] By combining multiple groups of weighing and unloading components 300 with the stirring component 200, a variety of solid particulate materials can be measured and mixed. The structure is compact and the functionality is strong. When used for feeding equipment such as plastic extruders, accurate measurement and pre-mixing of the feeding effect can be achieved. The solid particulate materials can also be crushed, separated and deblocked, providing a good processing basis for the production steps after feeding, thereby improving the quality and efficiency of the production and processing effects. In addition, each feed port 110 is equipped with a corresponding weighing and unloading component 300, which can simultaneously achieve weighing and unloading of a variety of solid particulate materials, with high processing efficiency and high weighing and metering accuracy. In addition to pre-mixing the solid particulate materials, the stirring component 200 can also effectively ensure the falling fluidity of the solid particulate materials, and can ensure smooth and stable feeding action.

[0040] In addition, the positioning frame 340 cooperates with the weighing plane of the weighing module 330 to form a temporary weighing space for accommodating solid particulate materials. After weighing is completed, the solenoid valve 312 is controlled to be closed to stop the discharge of the feed pipe 311. The brush 342, which is not affected by other external forces, can effectively limit the position of the solid particulate materials on the weighing plane. After weighing is completed, the motor 210 drives the rotating shaft 220 to rotate, and the push rod 240 and the stirring blade 230 rotate with the rotating shaft 220. The push rod 240 rotates through the discharge notch 341 to push the solid particulate materials on the weighing plane and push the brush 342 to bend. The bent brush 342 makes way for the solid particulate materials, and the solid particulate materials are discharged from the discharge notch along the The solid particles are pushed away from the weighing plane laterally and fall to the bottom of the tank body 100. At the same time, the stirring blade 230 rotates to stir and mix the solid particulate material in the tank body 100. The push rod 240 pushes out a layer of solid particulate material on the weighing plane every time it rotates one circle. The push rod 240 realizes the dropping of materials on the weighing plane in batches through multiple rotations. Each weighing and feeding assembly 300 realizes the dropping of different solid particulate materials in batches. The synchronously rotating stirring blade 230 can not only form a uniform stirring and mixing effect, but also the solid particulate material is pushed circumferentially, which can further improve the uniformity of the mixing effect, and can ensure the fluidity of the falling solid particulate material, which can effectively improve the continuous and stable feeding.

[0041] It can be understood that the side of the positioning frame 340 away from the rotating shaft 220 is an arc plate. Along the extension direction of the rotating shaft 220, the projections of the arc plate and the discharge notch 341 on the weighing plane have no intersection. The discharge notch 341 is arranged at the bottom of the other side plates in the positioning frame 340 except the arc plate. The center of the arc plate is located at the rotating shaft 220. The length of the push rod 240 is equal to the arc radius of the arc plate, so that the push rod 240 can push and scrape the material along the inner side of the arc plate, which can effectively improve the effectiveness of the push rod 240 in pushing the solid particulate material in the positioning frame 340, and ensure that the push rod 240 can reliably push all solid particulate materials in the positioning frame 340, thereby effectively improving the reliability of the unloading action after weighing and metering, and the accuracy of the weighing and metering operation is high, and the metering and feeding action is reliable.

[0042] It can be understood that there are multiple push rods 240, and one end of each push rod 240 is fixedly connected to the rotating shaft 220. The number of push rods 240 is equal to the number of weighing and unloading components 300. All push rods 240 are evenly distributed around the rotating shaft 220, and all weighing and unloading components 300 are evenly distributed around the rotating shaft 220. In the same time period, each push rod 240 is used to push and unload the solid particulate material in each positioning frame 340, which can effectively improve the unloading efficiency and thus effectively improve the feeding efficiency.

[0043] It can be understood that the bottom of the push rod 240 is a scraper portion 241 that narrows downward. The extension direction of the scraper portion 241 is parallel to the push rod 240. The scraper portion 241 is in the shape of a triangular prism, which extends in the horizontal direction, and the extension direction of the triangular prism is parallel to the push rod 240. The two adjacent edges of the triangular prism are arranged in the same horizontal plane, and the other edge of the triangular prism is located below the aforementioned horizontal plane. The lower edge of the triangular prism is used to hook the dial to contact the weighing plane.

[0044] By setting a scraper portion 241 at the bottom of the push rod 240, while ensuring the structural strength of the push rod 240, the friction between the bottom of the push rod 240 and the weighing plane can be effectively reduced, and the stability of the rotating pushing action of the push rod 240 can be effectively improved. At the same time, the wear between the push rod 240 and the weighing module 330 can be effectively reduced, which can effectively improve the stability of the overall structure and extend the service life.

[0045] It can be understood that the metering feeding device for solid particles also includes a controller, which is arranged outside the tank body 100. The controller is an electronic device provided with a control circuit. The weighing module 330 is a new type of sensor application structure. The weighing module 330 integrates the weighing sensor loading and transmission device and the installation connection plate into one. Preferably, a carrying plate is provided on the top of the weighing module 330. The top surface of the carrying plate is a weighing plane for carrying items for weighing. The signal output end of the weighing module 330 is electrically connected to the receiving end of the controller. The signal output of the weighing module 330 is electrically connected to the receiving end of the controller. The output end is the signal output end of the weighing sensor, and the signal input end of the solenoid valve 312 and the signal input end of the motor 210 are both electrically connected to the control end of the controller. After receiving the weighing signal from the weighing module 330 and judging that the preset weight value is reached, the controller sends a shutdown signal to the solenoid valve 312 to control the solenoid valve 312 to close and cut off the feeding of the feeding pipe 311, and the controller sends a start signal to the motor 210 to control the motor 210 to drive the rotating shaft 220 to rotate, thereby realizing the corresponding pushing and unloading, and stirring and mixing processing.

[0046] It should be noted that, in addition to setting up a controller to connect the weighing module 330, the motor 210 and the solenoid valve 312 respectively to achieve automatic control, the operation of the solenoid valve 312 and the motor 210 can also be controlled manually according to the weighing result of the weighing module 330.

[0047] It can be understood that there are four discharge ports 120 and four weighing and unloading components 300. According to the actual feeding type requirements, setting up four groups of weighing and unloading components 300 can meet the feeding requirements of up to four types of solid particulate materials and can adapt to the production and processing requirements of different products.

[0048] It is understandable that there are multiple stirring blades 230, one end of each stirring blade 230 is connected to the rotating shaft 220, and each stirring blade 230 is located below the supporting plate 320 to ensure that the rotating stirring action of the stirring blade 230 can be carried out smoothly.

[0049] It can be understood that the stirring blade 230 includes a horizontal bar 231 and a vertical bar 232. One end of the horizontal bar 231 is fixedly connected to the rotating shaft 220, and the other end of the horizontal bar 231 is fixedly connected to the vertical bar 232. The vertical bar 232 is located on one side of the inner wall of the tank body 100. The horizontal bar 231 cooperates with the vertical bar 232 to stir and mix the solid particulate material, and the vertical bar 232 can scrape the inner wall of the tank body 100, effectively remove the solid particulate material attached to the inner wall of the tank body 100, and effectively ensure the feeding effect.

[0050] It can be understood that the shape of the longitudinal rod 232 matches the shape of the inner wall of the tank body 100, that is, the corresponding positions of the longitudinal rod 232 and the inner wall of the tank body 100 are parallel to each other, and the distances between the longitudinal rod 232 and the inner wall of the tank body 100 are equal.

[0051] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A solid particle metering device, characterized in that: include: A tank body (100), wherein the top and bottom of the tank body (100) are respectively provided with a feed port (110) and a discharge port (120), and at least two feed ports (110) are provided; A stirring assembly (200) comprises a motor (210), a rotating shaft (220), a stirring blade (230) and a push rod (240), wherein the rotating shaft (220) and the stirring blade (230) are both arranged in the tank body (100), the rotating shaft (220) is connected to the motor (210), the rotating shaft (220) is rotatably connected to the tank body (100), the stirring blade (230) and the push rod (240) are both connected to the rotating shaft (220), and the stirring blade (230) is located below the push rod (240); A weighing and discharging assembly (300), wherein the number of the weighing and discharging assemblies (300) is equal to the number of the feed ports (110), and the weighing and discharging assembly (300) comprises a storage tank (310), a supporting plate (320), a weighing module (330) and a positioning frame (340), wherein the storage tank (310) is connected to the tank body (100), a feeding pipe (311) is provided at the bottom of the storage tank (310), a solenoid valve (312) is provided in the feeding pipe (311), the bottom of the feeding pipe (311) is connected to the feed port (110), the supporting plate (320) is connected to the tank body (100), the weighing module (330) is provided on the supporting plate (320), and the weighing module (330) is provided just below the feed port (110). The positioning frame (340) is connected to the weighing plane of the weighing module (330), the projection of the positioning frame (340) on the weighing module (330) is located in the weighing plane of the weighing module (330), the bottom of the positioning frame (340) is provided with a discharge notch (341) for making way for the push rod (240), the push rod (240) and the discharge notch (341) are located at the same horizontal height, the weighing plane of the weighing module (330) is set under the movement path of the push rod (240), the discharge notch (341) is provided with a brush (342), the top end of the brush (342) is connected to the bottom surface of the positioning frame (340), and the bottom end of the brush (342) abuts against the weighing plane of the weighing module (330).

2. A solid particle metering device according to claim 1, characterized in that: The side of the positioning frame (340) away from the rotating shaft (220) is an arc plate, the center of the arc plate is located at the rotating shaft (220), and the length of the push rod (240) is equal to the arc radius of the arc plate.

3. A solid particle metering device according to claim 1, characterized in that: The number of the push rods (240) is equal to the number of the weighing and unloading components (300), and all the push rods (240) are evenly distributed around the rotating shaft (220), and all the weighing and unloading components (300) are evenly distributed around the rotating shaft (220).

4. A solid particle metering device according to claim 1, characterized in that: The bottom of the push rod (240) is a scraper portion (241) that narrows downwards, and the extension direction of the scraper portion (241) is parallel to the push rod (240).

5. The solid particle metering device according to claim 1, characterized in that: The discharge ports (120) and the weighing and unloading components (300) are each provided with four.

6. The solid particle metering device according to claim 1, characterized in that: The stirring blades (230) are provided in plurality, and each stirring blade (230) is located below the supporting plate (320).

7. A solid particle metering device according to claim 6, characterized in that: The stirring blade (230) comprises a transverse rod (231) and a longitudinal rod (232), one end of the transverse rod (231) is connected to the rotating shaft (220), and the other end of the transverse rod (231) is connected to the longitudinal rod (232), and the longitudinal rod (232) is located on one side of the inner wall of the tank body (100).

8. A solid particle metering device according to claim 7, characterized in that: The shape of the longitudinal rod (232) matches the shape of the inner wall of the tank body (100).

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