Rotary scraper self-cleaning hopper scale device with vibration isolation function

Abstract

The application discloses a rotary scraper self-cleaning hopper scale device with vibration isolation function and belongs to the hopper metering field. The device comprises a hopper body, a double-support vibration isolation structure and an external annular rotary self-cleaning mechanism. In the double-support vibration isolation structure, hydraulic load-bearing struts and spring limiting struts are arranged in a ring-shaped staggered manner at the bottom of the hopper body. The hydraulic load-bearing struts are internally provided with a weighing sensor for bearing weight and collecting data, and the spring limiting struts are matched with buffer springs for limiting and absorbing vibration. The external annular rotary self-cleaning mechanism comprises supporting columns, a cleaning reduction motor, a gear set and an annular transmission member. The annular transmission member is connected with the outer ring of the hopper and extends with a scraper extending into the inner cavity. The application solves the problems that the sticking of viscous materials affects the metering accuracy, the driving components are easily eroded by dust and the cleaning vibration interferes with the weighing, realizes synchronous operation of weighing and cleaning, realizes long-term stable metering and has high equipment reliability.

Description

Technical Field

[0001] This invention belongs to the field of hopper metering technology, specifically relating to a rotary scraper self-cleaning hopper scale device with vibration isolation function. Background Technology

[0002] In the powder material batching process of industries such as metallurgy, chemical industry, and building materials, hopper scales are core metering equipment, and their stability and accuracy directly affect product quality and production costs. However, in actual production conditions, especially when handling sticky materials such as moist mineral powder and coal powder, existing hopper scale technology faces a series of technical challenges that urgently need to be solved.

[0003] First, the adhesion and caking of powdered materials severely impact metering accuracy. Moist mineral powder and coal powder readily adhere to the inner wall of the hopper upon contact. As production continues, new material constantly covers and compacts the adhered old material, resulting in layers of caking on the inner wall. This caking layer continuously alters the effective weight of the hopper, causing the data collected by the weighing sensor to no longer be the pure net weight of the material, but rather includes a portion of the fixed, adhered weight, thus creating a persistent metering deviation that is difficult to eliminate. Even more problematic is that these caking layers are not permanently stable and may randomly detach under the influence of external factors such as material impact and mechanical vibration. The detached lumps of material can instantly alter the flow rate in the feed channel, causing abrupt changes in the material ratio of the downstream batching system, severely affecting the uniformity of product quality, and potentially even triggering process accidents.

[0004] Secondly, the traditional arrangement of cleaning mechanisms leads to low equipment reliability and high maintenance costs. To address material accumulation, existing technologies typically incorporate scraper cleaning mechanisms inside the hopper. However, the drive mechanism—including the cleaning motor, bearing housing, gearbox, and other core transmission components—is generally installed inside the hopper or bin. In this confined, dusty environment, fine powder particles can penetrate deeply, continuously eroding the bearings, gear meshing surfaces, and motor coils of the transmission components, significantly accelerating wear and tear and resulting in a markedly high equipment failure rate. Furthermore, the internal space of the hopper is usually quite small, making it difficult for personnel and maintenance tools to enter and exit. Once equipment malfunctions, disassembly, repair, and replacement of parts are difficult, time-consuming, and severely impact production continuity.

[0005] Third, the contradiction between weighing capacity and vibration isolation is irreconcilable. The core function of a hopper scale is accurate weighing, which requires the mechanical environment in which the weighing sensor is located to be as stable as possible. However, scraper cleaning is itself a dynamic, loaded mechanical motion process, inevitably generating periodic vibrations and instantaneous impacts. In traditional designs, the hopper is fixed only by a single support structure (usually directly connected to the weighing sensor). This structure must bear the entire weight of the material and also transmit the vibrations generated by the cleaning mechanism. As a result, the vibrations and impacts generated by the cleaning operation are directly transmitted to the high-precision weighing sensor without any attenuation, causing severe fluctuations in the weighing signal and making it impossible to obtain a stable reading. Therefore, in actual production, in order to ensure accurate measurement, it is often necessary to adopt an intermittent operation mode of "stopping for cleaning and starting for weighing." This not only interrupts the production process and reduces the efficiency of continuous equipment operation, but also cannot cope with the problem of real-time material adhesion under continuous feeding conditions. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to solve the above problems and provide a rotary scraper self-cleaning hopper scale device with vibration isolation function.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A self-cleaning rotary scraper hopper scale device with vibration isolation function includes: Hopper body; The dual-support vibration isolation structure includes multiple hydraulic load-bearing supports and multiple spring-limiting supports. The hydraulic load-bearing supports and the spring-limiting supports are arranged in a staggered ring at the bottom of the hopper body and are respectively connected to corresponding lugs on the outer wall of the hopper body. The hydraulic load-bearing supports have built-in weighing sensors to bear the weight of the hopper body and the material inside and to collect weight data. The spring-limiting supports are equipped with buffer springs to limit the movement of the hopper body and absorb vibration. An externally mounted annular rotary self-cleaning mechanism includes an independently installed support column, a sweeping reduction motor mounted on the support column, a gear set connected to the output shaft of the sweeping reduction motor, and an annular transmission component connected to the outer ring of the hopper body; the gear set meshes with the annular transmission component to drive the annular transmission component to rotate circumferentially around the hopper body; the annular transmission component extends inward with a scraper that extends into the inner cavity of the hopper body.

[0008] As a preferred technical solution, the number of hydraulic load-bearing supports is 4, the number of spring limiting supports is 4, and the 8 supports are evenly and alternately distributed along the circumferential direction of the bottom of the hopper body.

[0009] As a further preferred technical solution, based on the four hydraulic support pillars and four spring limiting pillars, the number of hanging ears is eight sets, which are respectively fixedly installed on the outer wall of the hopper body. Each set of hanging ears is connected to the upper end of one of the hydraulic support pillars or one of the spring limiting pillars.

[0010] As a preferred technical solution, the annular transmission component is an annular gear ring, which is sleeved and fixed to the outer ring of the hopper body; the gear set includes a driving gear and a driven gear, the driving gear is installed on the output shaft of the cleaning reduction motor, and the driven gear meshes with the outer teeth of the annular gear ring.

[0011] As a preferred technical solution, it also includes an electronic control module, which is electrically connected to the sweeping reduction motor, the weighing sensor, and an eccentric vibration motor installed at the bottom of the hopper body; the electronic control module is configured to control the execution of at least one of the following: timed automatic sweeping mode, shutdown deep sweeping mode, and high-moisture powder continuous sweeping mode.

[0012] As a further preferred technical solution, in the shutdown deep cleaning mode and the high-moisture powder continuous cleaning mode, the electronic control module controls the annular scraper and the eccentric vibration motor to work synchronously to perform dual cleaning.

[0013] As a preferred technical solution, the upper end of the hydraulic load-bearing column is connected to the corresponding lug via a first ball joint structure, and the lower end is supported on the ground or foundation via a second ball joint structure; the upper end of the spring-limiting column is connected to the corresponding lug via a third ball joint structure.

[0014] As a preferred technical solution, the scraping surface of the scraper is covered with a wear-resistant layer.

[0015] The beneficial effects of this invention are as follows: 1. This invention achieves simultaneous high-precision weighing and online cleaning, significantly improving equipment operating efficiency and measurement stability. Through a dual-support vibration isolation structure, the weighing load and vibration isolation functions are physically separated. The hydraulic load-bearing column is specifically responsible for bearing the entire weight and outputting stable weight data, while the spring-limiting column forms an independent vibration-absorbing buffer system. When the external rotating cleaning mechanism operates, the vibration and torque it generates are significantly absorbed and attenuated by the corresponding spring-limiting column and its buffer spring through the connecting lugs. Vibration energy is effectively isolated before being transmitted to the hydraulic load-bearing column (i.e., the weighing sensor), preventing weighing data drift or jumps. This allows the equipment to continuously feed and weigh while simultaneously performing uninterrupted internal wall cleaning, fundamentally eliminating production interruptions caused by "stopping for cleaning" and significantly improving production continuity and efficiency.

[0016] 2. The problem of sticky material caking is solved at the source, greatly reducing manual intervention and safety risks. The externally arranged annular rotary self-cleaning mechanism configured in the present invention drives the scraper through the annular transmission member to perform 360-degree dead-angle-free continuous rotary scraping on the inner wall of the hopper. This active and continuous cleaning method can strip the material at the initial stage when it starts to adhere, effectively preventing the accumulated material from stacking layer by layer and hardening into caking, ensuring the cleanness of the inner wall of the hopper, maintaining the accuracy of the metering reference, and greatly reducing the risk of batching out of control caused by random falling of caking. At the same time, the necessity of manual entry into the hopper for high-altitude and confined space cleaning operations after shutdown is basically eliminated, significantly reducing the safety risk and labor intensity of operating personnel.

[0017] 3. The service life of core transmission components and equipment reliability are significantly improved, with convenient maintenance. In the present invention, all key components of the full set of driving mechanisms for cleaning operations, such as the geared motor and gear set, are all arranged on the outer side of the hopper, so that the precision transmission components are completely isolated from the harsh environment full of dust and severe scouring inside the hopper. The external environment is relatively clean, easy to observe and access, which effectively avoids the erosion of powder on motor heat dissipation, gear lubrication and bearing sealing, and greatly extends the fault-free operation time of the equipment. Since the driving mechanism is arranged externally, the operation space is open when overhauling or replacing components, the operation is simple and convenient, the maintenance time is greatly shortened, and the maintenance cost is reduced. The entire self-cleaning mechanism can be designed as a modular component, which is convenient for retrofitting and upgrading the existing in-service hopper scales.

[0018] 4. Intelligent and multi-mode cleaning control is realized to meet the demands of complex working conditions. The present invention realizes intelligent management of cleaning operations through the matching electric control module. The timed automatic cleaning mode can automatically maintain equipment cleanliness during production intervals; the shutdown deep cleaning mode extends the cleaning duration after production ends to completely remove residual powder and prevent hardening during standing; the high-humidity powder continuous cleaning mode can increase the cleaning intensity under the synchronous weighing state or activate the dual cleaning mode of the annular scraper and the eccentric vibration motor for particularly difficult-to-treat materials. This flexibly adjustable control logic enables the device to adapt to the complex working condition requirements of different material characteristics and different production rhythms, ensuring that the equipment is always kept in the optimal working state.

[0019] Other advantages, objectives and features of the present invention will be set forth in part in the following description, and to a certain extent, will be apparent to those skilled in the art based on the investigation and study of the following content, or can be learned from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. Brief Description of the Drawings

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described below in preferred detail with reference to the accompanying drawings, in which: Figure 1 This is a front view of the single-handed pen-type automatic induction suction soldering auxiliary device of the present invention.

[0021] Figure 2 yes Figure 1 Top view.

[0022] Reference numerals in the attached drawings: 1-hopper body; 2-hydraulic load-bearing support; 3-spring limit support; 4-weighing sensor; 5-eccentric vibration motor; 6-sweeping reduction motor; 7-gear set; 8-ring gear; 9-scraper. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0025] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] Example 1 like Figures 1-2 As shown, a rotary scraper self-cleaning hopper scale device with vibration isolation function is provided, including hopper body 1, double support vibration isolation structure and external ring rotary self-cleaning mechanism.

[0027] The hopper body 1 is a cylindrical structure used to hold powdery materials such as mineral powder and coal powder to be measured. It has a discharge port at the bottom. Eight sets of hanging ears are evenly fixed on the outer wall of the hopper body 1 along the circumference. Each set of hanging ears is connected to the upper end of the corresponding support column.

[0028] The double-support vibration isolation structure includes four hydraulic load-bearing supports 2 and four spring-limiting supports 3, totaling eight supports evenly and alternately distributed along the circumference of the bottom of the hopper body 1. That is, there is a spring-limiting support 3 between two adjacent hydraulic load-bearing supports 2, and vice versa, forming a ring-shaped staggered layout. The upper end of the hydraulic load-bearing support 2 is hinged to the corresponding lug through a first ball joint structure, and the lower end is supported on the ground or equipment base through a second ball joint structure. The ball joint structure connection can compensate for the slight deflection and displacement of the hopper under load and temperature changes, and avoid the support bearing additional bending moment. The cylinder of the hydraulic load-bearing support 2 A weighing sensor 4 is installed. When material is loaded into the hopper body 1, the entire load is transferred to the four hydraulic support columns 2 through the lugs. The weighing sensor 4 collects weight data. Since the ball joint connection does not restrict radial displacement, the weighing sensor 4 only bears axial pressure, ensuring measurement accuracy. The upper end of the spring limiting column 3 is hinged to the corresponding lug through a third ball joint structure. It is equipped with a buffer spring. The spring limiting column 3 does not bear the static weight of the hopper and material. Its function is to limit the hopper body 1 to prevent excessive displacement of the hopper in the horizontal direction, while absorbing vibration and impact energy from the cleaning mechanism.

[0029] The externally mounted annular rotary self-cleaning mechanism includes a support column independently installed on the outside of the hopper body 1, a sweeping reduction motor 6 mounted on the support column, a gear set 7 connected to the output shaft of the sweeping reduction motor 6, and an annular gear ring 8 connected to the outer ring of the hopper body 1. The bottom of the support column is fixed to the ground or equipment foundation, and is independent of the support system of the hopper body 1, without interfering with each other. The gear set 7 includes a driving gear and a driven gear. The driving gear is mounted on the output shaft of the sweeping reduction motor 6, and the driven gear meshes with the outer teeth of the annular gear ring 8. The annular gear ring 8 is sleeved and fixed to the outer ring of the hopper body 1, with an outer edge reinforced with... The cleaning gear has gear teeth. When the cleaning reduction motor 6 is started, the power is transmitted to the driven gear through the driving gear. The driven gear drives the ring gear 8 to rotate circumferentially around the axis of the hopper body 1. Multiple sets of inwardly extending scrapers 9 are fixed at circumferential intervals on the inner side of the ring gear 8. The ends of the scrapers 9 extend into the inner cavity of the hopper body 1. The scraping surface of the scrapers 9 is covered with a wear-resistant layer to extend the service life under highly abrasive powder conditions. The entire drive mechanism—including the support column, the cleaning reduction motor 6, and the gear set 7—is arranged on the outside of the hopper body 1, completely avoiding the dust environment and material scouring area inside the hopper.

[0030] It also includes an electronic control module and an eccentric vibration motor 5 installed at the bottom of the hopper body 1. The electronic control module is electrically connected to the cleaning reduction motor 6, the weighing sensor 4 and the eccentric vibration motor 5 respectively. The electronic control module is configured to control and execute three cleaning modes: timed automatic cleaning mode, shutdown deep cleaning mode and high-moisture powder continuous cleaning mode.

[0031] The working process is as follows: First, weighing is performed: the material is loaded into the hopper body 1, and the entire load is transferred to the built-in weighing sensor 4 of the hydraulic support column 2 through the lug. The spring limit column 3 only plays a limiting and buffering role, with no load diversion, and the weight data is collected stably.

[0032] Simultaneously, a self-cleaning operation is performed: the sweeping reduction motor 6 drives the gear set 7, and the gear set 7 meshes to drive the ring gear ring 8 to rotate around the hopper body 1. The scraper 9 on the ring gear ring 8 moves in a circular motion along the inner wall of the hopper, continuously scraping off the powder that adheres to and clumps on the inner wall. The vibration and torque generated by sweeping are transmitted to the hanging lugs through the hopper body 1. Most of the vibration energy is absorbed and attenuated by the spring limit support column 3 and its matching buffer spring. Only a very small amount of vibration can be transmitted to the weighing sensor 4 on the hydraulic load-bearing support column 2, and the weighing value does not drift. The scraped-off accumulated material is discharged from the bottom outlet along with the material.

[0033] The specific operation of the three cleaning modes controlled by the electronic control module is as follows: In the timed automatic cleaning mode, the electronic control module automatically starts the cleaning reduction motor 6 at preset time intervals to perform short-term circular scraper cleaning operations, while the weighing operation is uninterrupted, achieving online synchronous self-cleaning; In the shutdown deep cleaning mode, after the equipment stops, the electronic control module automatically extends the working time of the cleaning reduction motor 6 to remove residual powder from the inner wall of the hopper, preventing the material from hardening and clumping during the shutdown period. At the same time, the electronic control module controls the circular scraper 9 and the eccentric vibration motor 5 to work synchronously for dual cleaning—the circular scraper 9 is responsible for mechanical scraping, and the vibration generated by the eccentric vibration motor 5 assists in peeling off stubborn deposits. The two work together to improve the cleaning effect; In the high-moisture powder continuous cleaning mode, for high-humidity and high-viscosity material conditions, the electronic control module controls the cleaning reduction motor 6 to run at a lower speed for a long time, performing uninterrupted cleaning while continuously feeding and weighing. The circular scraper 9 and the eccentric vibration motor 5 can also be activated synchronously for dual cleaning.

[0034] When the vibration generated by the sweeping operation is transmitted to each lug through the hopper body 1, the vibration energy is distributed according to the mechanical path because the eight sets of lugs on the outer wall of the hopper body 1 are respectively connected to four hydraulic load-bearing pillars 2 and four spring-limiting pillars 3: the lugs connected to the spring-limiting pillars 3 transmit the vibration to the buffer spring, the buffer spring undergoes elastic deformation to convert the vibration energy into elastic potential energy and then gradually releases and attenuates it, and the vibration is effectively buffered and isolated; the lugs connected to the hydraulic load-bearing pillars 2 absorb small radial vibrations due to the hydraulic damping characteristics and the large axial stiffness of the pillars themselves, and the axial load is not affected; finally, all the vibration generated by the sweeping mechanism is buffered and isolated by the spring-limiting pillars 3 and cannot be transmitted to the weighing sensor 4, ensuring that the weighing value is stable and without drift.

[0035] The beneficial effects of the entire device are as follows: the load-bearing support and the spring vibration isolation support are set separately, the cleaning vibration is buffered and isolated by the spring, the weighing data has no drift, and the measurement is stable for a long time; the external annular rotating scraper 9 continuously scrapes the material accumulated on the cylinder wall, avoiding the hardening and caking of coal powder and mineral powder from the source, and greatly reducing manual cleaning; the external drive components are not corroded by dust and materials, and the failure rate is low; existing hopper scales can be modularly added and modified to adapt to metallurgical powder working conditions.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A rotary scraper self-cleaning hopper scale device with vibration isolation function, characterized in that, include: Hopper body; The dual-support vibration isolation structure includes multiple hydraulic load-bearing supports and multiple spring-limiting supports. The hydraulic load-bearing supports and the spring-limiting supports are arranged in a staggered ring at the bottom of the hopper body and are respectively connected to corresponding lugs on the outer wall of the hopper body. The hydraulic load-bearing supports have built-in weighing sensors to bear the weight of the hopper body and the material inside and to collect weight data. The spring-limiting supports are equipped with buffer springs to limit the movement of the hopper body and absorb vibration. An externally mounted annular rotary self-cleaning mechanism includes an independently installed support column, a sweeping reduction motor mounted on the support column, a gear set connected to the output shaft of the sweeping reduction motor, and an annular transmission component connected to the outer ring of the hopper body; the gear set meshes with the annular transmission component to drive the annular transmission component to rotate circumferentially around the hopper body; the annular transmission component extends inward with a scraper that extends into the inner cavity of the hopper body.

2. The apparatus according to claim 1, characterized in that, The number of hydraulic support pillars is 4, the number of spring limiting pillars is 4, and the 8 pillars are evenly and alternately distributed along the circumferential direction of the bottom of the hopper body.

3. The apparatus according to claim 2, characterized in that, The number of hanging ears is 8 sets, which are fixedly installed on the outer wall of the hopper body. Each set of hanging ears is connected to the upper end of a hydraulic support column or a spring limiting column.

4. The apparatus according to claim 1, characterized in that, The annular transmission component is an annular gear ring, which is sleeved and fixed to the outer ring of the hopper body; the gear set includes a driving gear and a driven gear, the driving gear is installed on the output shaft of the cleaning reduction motor, and the driven gear meshes with the outer teeth of the annular gear ring.

5. The apparatus according to claim 1, characterized in that, It also includes an electronic control module, which is electrically connected to the sweeping reduction motor, the weighing sensor and an eccentric vibration motor installed at the bottom of the hopper body; the electronic control module is configured to control the execution of at least one of the following modes: timed automatic sweeping mode, shutdown deep sweeping mode and high-moisture powder continuous sweeping mode.

6. The apparatus according to claim 5, characterized in that, In the shutdown deep cleaning mode and the high-moisture powder continuous cleaning mode, the electronic control module controls the annular scraper and the eccentric vibration motor to work synchronously for dual cleaning.

7. The apparatus according to claim 1, characterized in that, The upper end of the hydraulic load-bearing support is connected to the corresponding lug via a first ball joint structure, and the lower end is supported on the ground or foundation via a second ball joint structure; the upper end of the spring-limiting support is connected to the corresponding lug via a third ball joint structure.

8. The apparatus according to any one of claims 1 to 7, characterized in that, The scraping surface of the scraper is covered with a wear-resistant layer.

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