Lever type elastic vibration device and rotary switching type granulation device

Abstract

A lever type elastic vibration device comprises a base, a U-shaped lever rocker arm is arranged above the base, the open end of the U-shaped lever rocker arm is hinged to the base to form a lever fulcrum, and the closed end of the U-shaped lever rocker arm is provided with a vibration source to form a lever power point; a vibration platform is elastically supported above the base, and the vibration platform is connected with the middle part of the U-shaped lever rocker arm to form a lever resistance point; when the vibration source vibrates, the power point drives the U-shaped lever rocker arm to vibrate around the lever fulcrum, and then the resistance point drives the vibration platform to elastically vibrate up and down. According to the lever type elastic vibration device, a labor-saving lever structure is adopted, so that the vibration platform can be driven by the vibration motor with lower power to generate vibration motion. And based on the lever principle, the amplitude of the resistance point is smaller than that of the vibration motor, so that the characteristic is beneficial to improving the energy utilization efficiency while ensuring that the granulation spray head obtains a stable vibration effect.

Description

Technical Field

[0001] This utility model belongs to the field of high-tower compound fertilizer granulation technology, and particularly relates to a lever-type elastic vibration device and a rotary switching granulation device. Background Technology

[0002] The tower-type melt granulation process for compound fertilizer differs significantly from that for pure urea or pure ammonium nitrate. Compound fertilizer melt contains a high proportion of solid powder materials such as phosphorus and potassium, necessitating heating and mechanical stirring to rapidly combine the molten liquid with these solid wastes into a low-temperature eutectic with a certain degree of fluidity. Due to the presence of numerous suspended solid particles in this eutectic, its viscosity is significantly higher than that of pure urea or pure ammonium nitrate melt. Traditional granulation equipment struggles to meet its specific process requirements. Therefore, a differential granulator and differential granulation nozzle are needed to meet the melt granulation needs of compound fertilizer. However, since the droplets produced by the rotating granulation nozzle will vary in volume, and considering the unavoidable nature of this variation and economic considerations for production costs, the national standard GB15063-2020 for compound fertilizer stipulates that 90% of the total volume should be spherical particles with a diameter ranging from 1 to 4.75 mm to be considered a qualified product. However, in the face of fierce market competition, compound fertilizer companies are forced to reduce their particle size standards to 2-4 mm or even narrower ranges. This undoubtedly poses a greater challenge to the performance of granulators. Given that current granulators cannot meet this particle size requirement, companies are forced to rely on primitive screening methods to improve product market competitiveness. This inevitably leads to a large amount of returned material with substandard particle size, resulting in increased production costs and reduced production efficiency. Therefore, improving the finished product qualification rate is of paramount practical significance and commercial value for companies. Over the years, the high-tower granulation industry has done a great deal of work on improving the process and equipment for achieving the finished product qualification rate, including adding vibration mechanisms to compound fertilizer granulation equipment. However, due to various reasons, vibration granulation technology has not yet been applied to large-scale industrial production in the high-tower compound fertilizer production process.

[0003] The most recent prior art to this application is the applicant's previously filed utility model patent, "Compound Fertilizer Differential Granulation Equipment with Vibration Function (CN204625501U)". This technical solution adds a vibration mechanism to the basic compound fertilizer differential granulation device. By manually controlling the vibration frequency and amplitude of the granulation nozzle, the jet ejected from the granulation nozzle is made to break into droplets of a certain size more uniformly under the action of vibration. At the same time, for high-viscosity melts, vibration can significantly improve their fluidity. This characteristic is highly consistent with the requirements of high-viscosity melts in high-tower compound fertilizer granulation processes. In addition, vibration can also enhance the density of the particles, giving them better strength.

[0004] High-tower compound fertilizer granulation typically employs a rotary switching granulator (CN 205398505U). Two identical granulators are mounted on rotatable and liftable supports, serving as backups for each other. This rapid switching device allows for easy interchange of working positions and is widely used in high-tower compound fertilizer melt granulation processes. However, due to the special properties of the materials used in melt-process compound fertilizer granulation, the nozzles are prone to clogging, negatively impacting the finished product yield and output, and potentially leading to serious accidents such as nozzle adhesion to the tower wall. Therefore, in actual production, especially when producing high-viscosity formulations, frequent nozzle replacement is necessary, sometimes even every two hours. To address this issue, some companies have upgraded their traditional one-on-one standby granulation units to one-on-two or even one-on-three standby units to meet the need for frequent nozzle replacement, improve finished product yield, and extend the lifespan of the granulation nozzles.

[0005] If the vibration mechanism method (CN204625501U) is combined with the rotary switching granulator (CN205398505U), that is, a dedicated bracket is installed above the drive motor of each granulator, with a vibration motor mounted on the top of the bracket, and a set of pressure springs installed on the granulator base, this method is feasible in experimental setups. However, in large-scale industrial production, many drawbacks are exposed: Firstly, due to the large vertical distance between the vibration motor and the base springs, the vibration emitted by the motor is transmitted to the granulation nozzles, causing uncontrollable deviations and making it impossible to ensure stable and consistent vibration effects from the granulation nozzles. Secondly, each granulator requires a separate vibration source and spring device, which not only increases the size and weight of the differential granulator but also significantly increases equipment procurement costs and operational complexity. This is especially true for rotary switching granulators using a one-on-two or one-on-three-on-three-on configuration, where not only is the increase in equipment cost particularly significant, but it is also difficult to guarantee stable and consistent vibration effects from multiple granulation nozzles. As a result, the high-tower granulation process for compound fertilizers has not yet successfully applied vibration granulation technology to generate profits for enterprises. Utility Model Content

[0006] This invention provides a lever-type elastic vibration device and a rotary switching granulation device to overcome the shortcomings of the prior art.

[0007] The technical solution adopted by this utility model is as follows: a lever-type elastic vibration device, including a base, a U-shaped lever rocker arm provided above the base, the open end of the U-shaped lever rocker arm is hinged to the base to form a lever fulcrum, and the closed end is provided with a vibration source to form a lever power point; a vibration platform is elastically supported above the base, and the vibration platform is connected to the middle part of the U-shaped lever rocker arm to form a lever resistance point; when the vibration source vibrates, the power point drives the U-shaped lever rocker arm to vibrate around the lever fulcrum, and then the resistance point drives the vibration platform to vibrate up and down elastically.

[0008] The vibration source is a vibratory motor, a magnetostrictive vibrator, an electrical pulse vibrator, or an ultrasonic vibrator.

[0009] The vibration platform is elastically supported on the base by several evenly distributed compression springs.

[0010] A rotary switching granulation device includes a base, on which a rotating support is mounted. At least two identical granulators capable of vertical lifting are mounted on the rotating support around its rotation center. A granulator limiting hole is provided on the base perpendicularly corresponding to the position of one of the granulators. The device is characterized by:

[0011] A U-shaped lever rocker arm is provided above the base of the granulator limiting hole. The open end of the U-shaped lever rocker arm is hinged to the base to form a lever fulcrum, and the closed end is provided with a vibration source to form a lever power point. A vibration platform is elastically supported above the base, and the vibration platform is connected to the middle of the U-shaped lever rocker arm to form a lever resistance point. The vibration platform is provided with a granulator positioning hole corresponding to the granulator limiting hole, and the lever resistance point is located on the center line of the granulator positioning hole.

[0012] When the granulator above the positioning hole descends into the positioning hole and the limiting hole of the granulator to start working as a working machine, the vibration source starts to vibrate. Through the power point, it drives the U-shaped lever rocker arm to vibrate around the lever fulcrum, and then drives the vibration platform to vibrate up and down elastically through the resistance point, and then drives the granulator to vibrate through the vibration platform.

[0013] When the granulator used as the working machine malfunctions, it can be raised and fixed, and then another spare granulator can be rotated to the position hole of the granulator directly above it by rotating the support. The spare granulator can then be lowered into the position hole and limit hole of the granulator to take over the work, and the vibration platform can continue to drive the granulator to vibrate.

[0014] The vibration source is a vibration motor, a magneto-vibrator, an electrical pulse vibrator, or an ultrasonic vibrator, and is fixed to the middle of the outer side of the closed end of the U-shaped lever rocker arm.

[0015] The vibration platform is elastically supported above the base by compression springs evenly distributed around the granulator's limiting holes.

[0016] Positioning posts are evenly distributed around the granulator limiting holes on the base, and positioning sleeves corresponding to the positioning posts are evenly distributed around the granulator positioning holes on the vibration platform. The compression spring is fitted onto the positioning posts, and the positioning sleeves are fitted around the compression spring.

[0017] The base is symmetrically provided with hinge ears, and the open end of the U-shaped lever rocker arm is hinged to the hinge ear through a horizontal hinge shaft to form a lever fulcrum.

[0018] The vibration platform is symmetrically provided with hinge plates on both sides, and the middle part of the U-shaped lever rocker arm is connected to the hinge plate through a horizontal pin to form a lever resistance point.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The lever-type elastic vibration device adopts a force-saving lever structure, allowing the vibration platform to generate vibration motion with a relatively small-power vibration motor. Simultaneously, the vibration frequency of the motor can be easily adjusted via a frequency converter, and the amplitude can be adjusted by changing the angle of the eccentric block at the end of the motor shaft. Furthermore, based on the lever principle, the amplitude at the resistance point is smaller than the amplitude of the vibration motor. This characteristic helps to improve energy utilization efficiency while ensuring stable vibration of the granulation nozzle.

[0021] 2. The lever-type elastic vibration device is installed on the base of the granulator's rotating switching bracket. When the vibration motor is working, the vibration platform can float freely up and down under the upward support of the pressure spring, ensuring that the vibration platform follows the amplitude of the vibration motor and performs reciprocating vibration motion, providing stable and controllable vibration for the granulation nozzle, effectively improving the uniformity of compound fertilizer granules and the finished product qualification rate.

[0022] 3. Because the lever-type elastic vibration device is installed on the base of the granulator's rotating support, whether it's a one-on-one, one-on-two-on-one, or one-on-three-on-one rotary switching granulator, only one vibration device is needed to complete the vibration granulation of the working machine. This not only significantly reduces equipment costs but also ensures stable and consistent vibration effects from multiple granulation nozzles. It overcomes the problem of difficulty in adjusting the vibration amplitude of multiple vibration motors to be completely consistent in one-on-two-on-one granulation equipment, ensuring stable and consistent vibration effects from multiple granulation nozzles, thereby improving the uniformity of compound fertilizer granules and the finished product qualification rate. Simultaneously, because the working granulator is suspended by the vibration platform, which is supported upwards by a set of pressure springs, it can float freely up and down. Therefore, even when the vibration motors are stopped, the vibration generated by the two drive motors of the working granulator alone can still provide a certain vibration effect. This vibration also has a positive effect on the finished product qualification rate and continuous working time. In other words, even without the vibration motors running, the granulation effect is better than that of traditional granulators.

[0023] 4. The lever-type elastic vibration device is not only suitable for high-tower compound fertilizer granulation processes, but can also be flexibly applied to the granulation processes of other chemical products, such as melt spray granulation processes using air as the cooling medium or melt spray granulation processes using liquid as the cooling medium, as well as rotary spray granulation or fixed spray disc vibration granulation in tower-type chemical product spray granulation processes. In short, this method can be used to apply a certain vibration to the granulation nozzle in most melt granulation processes to improve the product qualification rate and quality. It can be seen that this utility model has good versatility and adaptability in different chemical production scenarios, and provides an innovative and efficient solution for the optimization of granulation processes in the chemical industry.

[0024] 5. Simple structure, low cost, and strong practicality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the lever-type elastic vibration device of this utility model;

[0026] Figure 2 This is a cross-sectional view of the lever-type elastic vibration device of this utility model;

[0027] Figure 3 This is a schematic diagram of the connection line of the lever resistance point (3c) of the lever-type elastic vibration device of this utility model;

[0028] Figure 4 This is a schematic diagram of the lever-type elastic vibration device of this utility model;

[0029] Figure 5 This is a schematic diagram of the rotary switching granulation device of this utility model;

[0030] Figure 6 This is a schematic diagram of the working state of the rotary switching granulation device of this utility model. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in detail with reference to specific embodiments.

[0032] Example 1: A lever-type elastic vibration device, see attached diagram. Figure 1-3 The system includes a base 1, with a U-shaped lever rocker arm 3 mounted on top of the base 1. The open end of the U-shaped lever rocker arm 3 is hinged to the base 1 to form a lever fulcrum 3a, and the closed end is provided with a vibration source 4 to form a lever power point 3b. A vibration platform 2 is elastically supported on top of the base 1, and the vibration platform 2 is connected to the middle of the U-shaped lever rocker arm 3 to form a lever resistance point 3c. When the vibration source 4 vibrates, the U-shaped lever rocker arm 3 vibrates around the lever fulcrum 3a through the power point 3b, and then the vibration platform 2 vibrates up and down elastically through the resistance point 3c.

[0033] Specifically, the vibration source 4 is a vibration motor, a magnetostrictive vibrator, an electrical pulse vibrator, or an ultrasonic vibrator. In this embodiment, the vibration source 4 is preferably a vibration motor.

[0034] Specifically, the vibration platform 2 is elastically supported on the base 1 by a number of evenly distributed compression springs 10. In this embodiment, the number of compression springs 10 is preferably 8.

[0035] Example 2: A rotary switching granulation device, see attached figure. Figure 1-6 The system includes a base 1, on which a rotating support 6 is provided. At least two granulators 7 with the same structure and capable of being raised and lowered are provided on the rotating support 6 around its rotation center. A granulator limiting hole 8 is provided on the base 1 vertically corresponding to one of the granulators 7.

[0036] Furthermore, a U-shaped lever rocker arm 3 is provided above the base 1 of the granulator limiting hole 8. The open end of the U-shaped lever rocker arm 3 is hinged to the base 1 to form a lever fulcrum 3a, and the closed end is provided with a vibration source 4 to form a lever power point 3b. A vibration platform 2 is elastically supported above the base 1, and the vibration platform 2 is connected to the middle of the U-shaped lever rocker arm 3 to form a lever resistance point 3c. The vibration platform 2 is provided with a granulator positioning hole 9 corresponding to the granulator limiting hole 8, and the lever resistance point 3c is located on the center line of the granulator positioning hole 9.

[0037] Specifically, the base 1 is symmetrically provided with hinge ears 12, and the open end of the U-shaped lever rocker arm 3 is hinged to the hinge ears 12 through the horizontal hinge shaft 13 to form a lever fulcrum 3a.

[0038] Specifically, the vibration platform 2 is symmetrically provided with hinge plates 14 on both sides, and the middle part of the U-shaped lever rocker arm 3 is connected to the hinge plates 14 through a horizontal pin 16 to form a lever resistance point 3c.

[0039] When the granulator 7, located above the granulator positioning hole 8, descends into the granulator positioning hole 9 and the granulator limiting hole 8 to start working as a working machine, the vibration source 4 begins to vibrate. Through the power point 3b, it drives the U-shaped lever rocker arm 3 to vibrate around the lever fulcrum 3a, and then through the resistance point 3c, it drives the vibration platform 2 to vibrate up and down elastically. Finally, the vibration platform 2 drives the granulator 7 to vibrate.

[0040] When the granulator 7, which is the working machine, malfunctions, it can be raised and fixed. Then, by rotating the support 6, another spare granulator 7 can be rotated to the top of the granulator positioning hole 9 and lowered into the granulator positioning hole 9 and the granulator limit hole 8 to take over the work. The vibration platform 2 will continue to drive the granulator 7 to vibrate.

[0041] Specifically, the vibration source 4 is a vibration motor, a magnetostrictive vibrator, an electrical pulse vibrator, or an ultrasonic vibrator, and is fixed to the middle of the outer side of the closed end of the U-shaped lever rocker arm 3. In this embodiment, the vibration source 4 is preferably a vibration motor.

[0042] Specifically, the vibration platform 2 is elastically supported above the base 1 by compression springs 10 evenly distributed around the granulator limiting hole 8. In this embodiment, the number of compression springs 10 is preferably 8. The total elastic force of the compression springs is sufficient to support the weight of the entire granulator, and the compression springs are made of stainless steel.

[0043] Furthermore, positioning posts 11 are evenly distributed around the granulator limiting holes 8 on the base 1, and positioning sleeves 15, corresponding one-to-one with the positioning posts 11, are evenly distributed around the granulator positioning holes 9 on the vibration platform 2. The compression spring 10 is fitted onto the positioning posts 11, and the positioning sleeves 15 are fitted around the compression spring 10. The positioning sleeves 15 extend from the bottom surface of the vibration platform 2 to the top surface of the vibration platform 2, bringing the vibration platform 2 as close as possible to the base 1 for more stable vibration.

[0044] Working principle: After the granulator 7 sits on the vibrating platform 2, the compression spring 10 is in a compressed state. When the vibrating motor 4 works, it drives the U-shaped lever rocker arm 3 to vibrate up and down around the two lever fulcrums 3a, and at the same time drives the vibrating platform 2 to vibrate up and down, so that the granulator 7 sitting on the vibrating platform 2 vibrates synchronously and transmits the vibration to the granulation nozzle 7-1, providing stable and controllable vibration to the granulation nozzle. The granulation nozzle 7-1 rotates horizontally and also has a vertical vibration action. This action causes the melt jet to be cut by vertical vibration when it leaves the granulation nozzle, thus breaking into more uniform droplets, and finally making the cooled compound fertilizer granules uniform.

[0045] Compared with previously disclosed vibration devices, the significant advantage of this invention lies in the fact that the axis of the granulator positioning hole 9 coincides with the main axis of the granulator 7, meaning the two resistance points 3c are concentric and their connecting line intersects the granulator axis perpendicularly. Since the horizontal line of the granulator base center is the granulator's center of gravity, when the granulator base sits on the vibration platform 2, the lever resistance point 3c is located at the granulator's center of gravity. This design ensures that the granulator only produces longitudinal vertical vibration during vibration without lateral swaying. Through the resistance point of the lever rocker arm, the regularity and stability of the vibration transmission from the vibration platform to the granulation nozzle are achieved. Furthermore, since the power arm F1 of the lever rocker arm is greater than the resistance arm F2, a force-saving lever structure is formed, allowing the vibration platform to be driven by a smaller power vibration motor. Based on the lever principle, the amplitude of the resistance point is smaller than the amplitude of the vibration motor, a characteristic that helps improve energy efficiency while ensuring stable vibration of the granulation nozzle.

[0046] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Therefore, all equivalent variations made based on the content described in the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A lever-type elastic vibration device characterized by comprising: The system includes a base (1), above which is a U-shaped lever rocker arm (3). The open end of the U-shaped lever rocker arm (3) is hinged to the base (1) to form a lever fulcrum (3a), and the closed end is provided with a vibration source (4) to form a lever power point (3b). A vibration platform (2) is elastically supported above the base (1), and the vibration platform (2) is connected to the middle of the U-shaped lever rocker arm (3) to form a lever resistance point (3c). When the vibration source (4) vibrates, the U-shaped lever rocker arm (3) is driven to vibrate around the lever fulcrum (3a) through the power point (3b), and then the vibration platform (2) is driven to vibrate up and down elastically through the resistance point (3c).

2. The vibration apparatus of claim 1, wherein: The vibration source (4) is a vibration motor, a magneto-vibrator, an electrical pulse vibrator, or an ultrasonic vibrator.

3. The vibration apparatus of claim 1, wherein: The vibration platform (2) is elastically supported on the base (1) by a number of evenly distributed compression springs (10).

4. A rotary switching granulation device, comprising a base (1), a rotating support (6) provided on the base (1), at least two granulators (7) with identical structures and capable of vertical lifting and lowering are provided on the rotating support (6) around its rotation center, and a granulator limiting hole (8) is provided on the base (1) perpendicularly corresponding to one of the granulators (7); characterized in that: A U-shaped lever rocker arm (3) is provided above the base (1) of the granulator limiting hole (8). The open end of the U-shaped lever rocker arm (3) is hinged to the base (1) to form a lever fulcrum (3a), and the closed end is provided with a vibration source (4) to form a lever power point (3b). A vibration platform (2) is elastically supported above the base (1), and the vibration platform (2) is connected to the middle of the U-shaped lever rocker arm (3) to form a lever resistance point (3c). The vibration platform (2) is provided with a granulator positioning hole (9) corresponding to the granulator limiting hole (8), and the lever resistance point (3c) is located on the center line of the granulator positioning hole (9). When the granulator (7) above the granulator positioning hole (9) descends into the granulator positioning hole (9) and the granulator limiting hole (8) to start working as a working machine, the vibration source (4) starts to vibrate, and drives the U-shaped lever rocker arm (3) to vibrate around the lever fulcrum (3a) through the power point (3b), and then drives the vibration platform (2) to vibrate up and down elastically through the resistance point (3c), and then drives the granulator (7) to vibrate through the vibration platform (2); When the granulator (7) used as the working machine malfunctions, the granulator (7) can be raised and fixed, and then another spare granulator (7) can be rotated to the top of the granulator positioning hole (9) by rotating bracket (6), and lowered into the granulator positioning hole (9) and granulator limit hole (8) to take over the work, and continue to drive the granulator (7) to vibrate by vibration platform (2).

5. The prilling apparatus of claim 4, wherein: The vibration source (4) is a vibration motor, a magneto-vibrator, an electric pulse vibrator, or an ultrasonic vibrator, and is fixed to the middle of the outer side of the closed end of the U-shaped lever rocker arm (3).

6. The prilling apparatus of claim 4, wherein: The vibration platform (2) is elastically supported above the base (1) by compression springs (10) evenly distributed around the granulator limiting hole (8).

7. The granulating apparatus according to claim 6, characterized by: Positioning posts (11) are evenly distributed around the granulator limiting hole (8) on the base (1), and positioning sleeves (15) corresponding to the positioning posts (11) are evenly distributed around the granulator positioning hole (9) on the vibration platform (2). The compression spring (10) is fitted on the positioning post (11), and the positioning sleeve (15) is fitted around the compression spring (10).

8. The prilling apparatus of claim 4, wherein: The base (1) is symmetrically provided with hinge ears (12), and the open end of the U-shaped lever rocker arm (3) is hinged to the hinge ear (12) through a horizontal hinge shaft (13) to form a lever fulcrum (3a).

9. The prilling apparatus of claim 4, wherein: The vibration platform (2) is symmetrically provided with hinge plates (14) on both sides. The middle part of the U-shaped lever rocker arm (3) is connected to the hinge plate (14) through a horizontal pin (16) to form a lever resistance point (3c).

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