Powdered chemical material metering device

Abstract

The utility model relates to material metering equipment technical field especially relates to a kind of powdered chemical material metering device, including support frame and bunker, the middle part of support frame is horizontally provided with weighing platform, weighing platform bottom four corners are all installed with weighing sensor, multiple weighing sensor is all fixedly installed on support frame, the both ends of weighing sensor are respectively connected with weighing platform and support frame through ball hinge, the outlet at the bottom of bunker is installed with feeding pipe through flange, the lower end of feeding pipe is sealed, the feeding pipe is equipped with anti-blocking flow guide component, speed measuring tube is obliquely installed in the side of feeding pipe, double-mode speed measuring component is installed in speed measuring tube. The utility model weighing platform bottom adopts four weighing sensor array layout, cooperates ball hinge connection mode, effectively offsets asymmetric load interference such as partial load, torsion, and the precision of traditional single sensor metering equipment is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of material metering equipment technology, and in particular to a metering device for powdered chemical materials. Background Technology

[0002] Metering devices for powdered chemical materials are one of the core pieces of equipment in the chemical production process. They are widely used in key stages such as chemical raw material proportioning, catalyst addition, and finished product packaging. Their metering accuracy directly affects product quality stability, production cost control, and the level of intelligence in the production process. Such devices need to be adapted to the diverse characteristics of powdered materials in the chemical industry, including different flowability, internal friction angles, adhesion, and corrosivity. At the same time, they need to meet the stability and reliability requirements in continuous production scenarios. Currently, most mainstream metering devices for powdered chemical materials are based on the principle of weighing and metering. They collect weight signals through a single weighing sensor and combine them with mechanical structures to realize the conveying and metering of materials, providing a basic guarantee for the continuous operation of chemical production.

[0003] Existing metering devices for powdered chemical materials still have many technical problems in practical applications, making it difficult to meet the production requirements of high precision and high stability. Metering accuracy is easily affected by multiple factors. Traditional devices mostly use a single weighing sensor, which cannot offset the systematic errors caused by off-center loading, equipment vibration, and silo pressure fluctuations. After long-term operation, the accuracy drifts seriously, resulting in inaccurate raw material ratios and product quality fluctuations. Utility Model Content

[0004] The purpose of this invention is to address the following shortcomings in the existing technology: it is difficult to meet the production requirements of high precision and high stability; the metering accuracy is easily affected by multiple factors; traditional devices mostly use a single weighing sensor, which cannot offset the systematic errors caused by off-center loading, equipment vibration, and silo pressure fluctuations; and the accuracy drifts seriously after long-term operation, resulting in inaccurate raw material ratios and product quality fluctuations. Therefore, this invention proposes a metering device for powdered chemical materials.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A metering device for powdered chemical materials includes a support frame and a hopper. A weighing platform is horizontally arranged in the middle of the support frame. The hopper is mounted on the weighing platform via an elastic support seat. Weighing sensors are installed at the four corners of the bottom of the weighing platform. Multiple weighing sensors are fixedly mounted on the support frame. The two ends of each weighing sensor are connected to the weighing platform and the support frame respectively via ball joints. A feed pipe is installed at the bottom outlet of the hopper via a flange. The lower end of the feed pipe is sealed. An anti-clogging guide component is installed inside the feed pipe. A speed measuring tube is installed at an angle on the side of the feed pipe. A dual-mode speed measuring component is installed inside the speed measuring tube.

[0006] Preferably, the anti-clogging guide assembly includes a rotating shaft vertically rotatably installed inside the feed pipe, a spiral guide vane fixedly sleeved on the rotating shaft, and a drive motor fixedly installed at the lower end of the feed pipe. The lower end of the rotating shaft extends out of the feed pipe and is fixedly connected to the output shaft of the drive motor. A gap is provided between the spiral guide vane and the inner wall of the feed pipe.

[0007] Preferably, vibrators are symmetrically fixedly installed on the outer wall of the feed pipe, and an anti-stick liner is pasted on the inner wall of the feed pipe and the surface of the spiral guide vanes. The anti-stick liner is made of polytetrafluoroethylene.

[0008] Preferably, the dual-mode speed measurement component includes a microwave speed sensor and an impeller speed measurement component. The microwave speed sensor is installed on the upper side of the speed measuring tube, and the probe of the microwave speed sensor extends through the speed measuring tube into the interior.

[0009] Preferably, the impeller speed measuring assembly is disposed on the inner wall of the speed measuring tube. The impeller speed measuring assembly includes a rotating shaft, an impeller body and an encoder. The rotating shaft is rotatably mounted inside the speed measuring tube via a bracket. The impeller body is fixedly mounted on one end of the rotating shaft. The encoder is mounted on the bracket and connected to one end of the rotating shaft.

[0010] Preferably, a shock-absorbing pad is installed at the bottom of the support frame, and the shock-absorbing pad is made of rubber.

[0011] The beneficial effects of this utility model are as follows: 1. The bottom of the weighing platform adopts a layout of four weighing sensor arrays, combined with a ball joint connection, which effectively counteracts the interference of asymmetrical loads such as off-center loads and torsional forces, resulting in a significant improvement in accuracy compared to traditional single-sensor metering equipment. 2. The microwave speed sensor inside the speed measuring tube and the impeller speed measuring component form a dual-mode speed measuring structure. The microwave speed sensor can detect the material flow rate in a non-contact manner, and the impeller speed measuring component is verified by mechanical rotation. The data of the two are mutually calibrated to further improve the measurement accuracy. 3. The spiral guide vanes inside the feed pipe rotate under the drive of the motor, which can not only guide the material to avoid blockage, but also make the material fall evenly. The non-stick liner made of polytetrafluoroethylene can prevent powdery materials from adhering to the pipe wall and the surface of the vanes. Combined with the symmetrically installed vibrators, material accumulation is further eliminated. The overall design effectively solves the problem of easy blockage and sticking of powdery materials, ensuring continuous and stable production process. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of a powdered chemical material metering device proposed in this utility model. Figure 2 A three-dimensional cross-sectional schematic diagram of the feed pipe, velocity measuring pipe, anti-clogging guide assembly, and dual-mode velocity measuring assembly; Figure 3 A three-dimensional cross-sectional schematic diagram of the velocity measuring tube and the dual-mode velocity measuring component; Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle.

[0013] In the diagram: 1 Support frame, 2 Hopper, 3 Weighing platform, 4 Elastic support seat, 5 Weighing sensor, 6 Feeding pipe, 7 Speed ​​measuring tube, 8 Rotating shaft, 9 Spiral guide vane, 10 Drive motor, 11 Vibrator, 12 Microwave speed sensor, 13 Rotating shaft, 14 Impeller body, 15 Encoder, 16 Shock-absorbing pad. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figures 1-2 A metering device for powdered chemical materials includes a support frame 1 and a hopper 2. A weighing platform 3 is horizontally arranged in the middle of the support frame 1. The hopper 2 is mounted on the weighing platform 3 via an elastic support seat 4. Weighing sensors 5 are installed at the four corners of the bottom of the weighing platform 3. Multiple weighing sensors 5 are fixedly installed on the support frame 1. The two ends of the weighing sensors 5 are respectively connected to the weighing platform 3 and the support frame 1 via ball joints. A feed pipe 6 is installed at the bottom outlet of the hopper 2 via a flange. The lower end of the feed pipe 6 is sealed. An anti-clogging guide component is installed inside the feed pipe 6. A speed measuring tube 7 is installed obliquely on the side of the feed pipe 6. A dual-mode speed measuring component is installed inside the speed measuring tube 7. A shock-absorbing pad 16 is installed at the bottom of the support frame 1. The shock-absorbing pad 16 is made of rubber.

[0016] The support frame 1 provides the foundation support for the entire metering device, ensuring the stability of the installation positions of each component. The rubber shock-absorbing pads 16 at the bottom absorb the vibration of the equipment and the impact force transmitted from the ground, reducing the interference of vibration on the metering accuracy. The hopper 2 is used to store powdered chemical materials, providing raw materials for continuous metering. The elastic support base 4 connects the hopper 2 and the weighing platform 3, which can buffer the impact force generated by the shaking of materials in the hopper 2, avoiding local pressure changes that affect the weighing accuracy. The weighing platform 3 provides a horizontal installation reference for the hopper 2, and evenly transmits the weight of the material to the four weighing sensors 5 at the four corners. The four weighing sensors 5 are arranged in an array, equipped with... The ball joint connection effectively counteracts interference from asymmetrical loads such as off-center loads and torsional forces, significantly improving measurement accuracy compared to traditional single sensors. The ball joint connection allows for slight deformation of the weighing platform 3, ensuring uniform force on each weighing sensor 5 and reducing systematic errors. The feed pipe 6 is connected to the hopper 2 via a flange to achieve directional material conveying. The lower end is sealed to prevent material leakage. The anti-blocking guide component prevents powdery materials from clogging the pipe and guides the material to fall evenly. The speed measuring tube 7 is installed at an angle to facilitate triggering of the speed measuring component when the material flows through. The dual-mode speed measuring component calibrates with each other through two speed measuring methods, further improving measurement accuracy.

[0017] Reference Figure 2 The anti-clogging guide assembly includes a rotating shaft 8 vertically rotatably installed inside the feed pipe 6, a spiral guide vane 9 fixedly sleeved on the rotating shaft 8, and a drive motor 10 fixedly installed at the lower end of the feed pipe 6. The lower end of the rotating shaft 8 extends out of the feed pipe 6 and is fixedly connected to the output shaft of the drive motor 10. The drive motor 10 provides power to the anti-clogging guide assembly. By rotating the output shaft, it drives the rotating shaft 8 and the spiral guide vane 9 to rotate synchronously. When the spiral guide vane 9 rotates, it generates axial thrust, which can both guide the material adhering to the pipe wall to avoid blockage and make the material fall evenly along the feed pipe 6, providing a stable material flow for accurate speed measurement. The rotating shaft 8 ensures that the spiral guide vane 9 rotates coaxially, avoiding eccentricity that leads to uneven material conveying.

[0018] Vibrators 11 are symmetrically fixedly installed on the outer wall of the feed pipe 6. The inner wall of the feed pipe 6 and the surface of the spiral guide vanes 9 are covered with an anti-stick liner. The anti-stick liner is made of polytetrafluoroethylene (PTFE). The surface of the PTFE anti-stick liner is smooth and does not easily adhere to materials. It can prevent powdery materials from adhering to the inner wall of the feed pipe 6 and the surface of the spiral guide vanes 9, and avoid material accumulation that affects the metering accuracy. When the symmetrically installed vibrators 11 are working, they generate high-frequency vibration, which can shake off the residual materials on the pipe wall and vanes, further preventing material accumulation and ensuring the continuous and stable production process. The vibration frequency of the vibrator 11 can be adjusted according to the material characteristics to avoid excessive vibration affecting the weighing accuracy.

[0019] Reference Figures 3-4The dual-mode speed measurement assembly includes a microwave speed sensor 12 and an impeller speed measurement assembly. The microwave speed sensor 12 is installed on the upper side of the speed measuring tube 7, and the probe of the microwave speed sensor 12 extends through the speed measuring tube 7 into the interior. The impeller speed measurement assembly is set on the inner wall of the speed measuring tube 7. The impeller speed measurement assembly includes a rotating shaft 13, an impeller body 14, and an encoder 15. The rotating shaft 13 is rotatably installed in the speed measuring tube 7 through a bracket. The impeller body 14 is fixedly installed at one end of the rotating shaft 13. The encoder 15 is installed on the bracket and connected to one end of the rotating shaft 13.

[0020] The microwave speed sensor 12 adopts a non-contact detection method, which captures the speed of material particles by emitting microwave signals. It is not affected by material adhesion and can quickly provide feedback on the material flow rate. In the impeller speed measurement component, when the material flows through the speed measuring tube 7, it impacts the impeller body 14 and drives the rotating shaft 13 to rotate. The encoder 15 records the rotation speed of the rotating shaft 13 and converts it into the material flow rate. The two speed measurement methods are mutually calibrated, which can offset the error of a single speed measurement method, further improve the measurement accuracy, and avoid measurement deviations caused by fluctuations in material flow rate.

[0021] In this invention, the weighing platform 3 provides a horizontal installation reference for the silo 2, and evenly transfers the weight of the material to the weighing sensors 5 at the four corners. The array layout of the four weighing sensors 5, combined with the ball joint connection, can effectively counteract the interference of asymmetrical loads such as off-center loads and torsional forces, significantly improving the measurement accuracy compared to the traditional single sensor. The ball joint connection allows slight deformation of the weighing platform 3, ensuring that each weighing sensor 5 is subjected to uniform force and reducing systematic errors. The feed pipe 6 is connected to the silo 2 through a flange to realize the directional conveying of materials. The lower end is sealed to prevent material leakage. The anti-blocking guide component prevents powdery materials from clogging the pipe and guides the material to fall evenly. The speed measuring tube 7 is installed at an angle to facilitate the triggering of the speed measuring component when the material flows through. The dual-mode speed measuring component is calibrated with each other through two speed measuring methods, further improving the measurement accuracy.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A metering device for powdered chemical materials, comprising a support frame (1) and a hopper (2), characterized in that, A weighing platform (3) is horizontally arranged in the middle part of the support frame (1). The hopper (2) is installed on the weighing platform (3) through an elastic support seat (4). Weighing sensors (5) are installed at the four corners of the bottom of the weighing platform (3). Multiple weighing sensors (5) are fixedly installed on the support frame (1). The two ends of the weighing sensors (5) are respectively connected to the weighing platform (3) and the support frame (1) through ball joints. The bottom outlet of the hopper (2) is equipped with a feed pipe (6) through a flange. The lower end of the feed pipe (6) is sealed. The feed pipe (6) is equipped with an anti-blocking guide component. The feed pipe (6) is installed with a speed measuring tube (7) at an angle on its side. The speed measuring tube (7) is equipped with a dual-mode speed measuring component.

2. The metering device for powdered chemical materials according to claim 1, characterized in that, The anti-clogging guide assembly includes a rotating shaft (8) vertically rotatably installed inside the feed pipe (6), a spiral guide blade (9) fixedly sleeved on the rotating shaft (8), and a drive motor (10) fixedly installed at the lower end of the feed pipe (6). The lower end of the rotating shaft (8) extends out of the feed pipe (6) and is fixedly connected to the output shaft of the drive motor (10).

3. The metering device for powdered chemical materials according to claim 2, characterized in that, Vibrators (11) are symmetrically fixed on the outer wall of the feed pipe (6). The inner wall of the feed pipe (6) and the surface of the spiral guide vane (9) are covered with an anti-sticking liner made of polytetrafluoroethylene.

4. The metering device for powdered chemical materials according to claim 1, characterized in that, The dual-mode speed measurement component includes a microwave speed sensor (12) and an impeller speed measurement component. The microwave speed sensor (12) is installed on the upper side of the speed measuring tube (7), and the probe of the microwave speed sensor (12) extends through the speed measuring tube (7) into the interior.

5. A metering device for powdered chemical materials according to claim 4, characterized in that, The impeller speed measuring assembly is installed on the inner wall of the speed measuring tube (7). The impeller speed measuring assembly includes a rotating shaft (13), an impeller body (14), and an encoder (15). The rotating shaft (13) is rotatably installed inside the speed measuring tube (7) through a bracket. The impeller body (14) is fixedly installed at one end of the rotating shaft (13). The encoder (15) is installed on the bracket and connected to one end of the rotating shaft (13).

6. The metering device for powdered chemical materials according to claim 1, characterized in that, The bottom of the support frame (1) is equipped with a shock-absorbing pad (16), which is made of rubber.

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