Granulator switching device

Abstract

The utility model relates to the technical field of spray granulation equipment, in particular to a high-tower compound fertilizer granulator switching device which comprises a rotatable frame body, a pair of granulators capable of ascending and descending along the frame body are arranged on the frame body, and a lifting mechanism for driving the granulators to ascend and descend along the frame body is further arranged on the frame body. The lifting mechanism comprises a motor, a worm and gear mechanism, a chain wheel shaft and a chain, the output end of the motor is connected with a worm in the worm and gear mechanism, the output end of the worm and gear mechanism is connected with the chain wheel shaft, the chain is erected on a chain wheel of the chain wheel shaft, and the first end of the chain is connected with the granulator; due to the fact that the worm and gear mechanism is adopted for rotation, the granulator has the stable lifting speed, meanwhile, the worm and gear have the self-locking capacity, the risk that the granulator does not generate rapid falling when a fault occurs can be effectively avoided, and safety is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of spray granulation equipment, specifically to a switching device for a high-tower compound fertilizer granulator. Background Technology

[0002] The melt granulation process for high-tower compound fertilizer is divided into two main categories: urea-based and nitro-based. Urea-based granulation uses urea as the nitrogen base material and as the melt carrier to combine with phosphorus and potassium. Nitro-based granulation uses ammonium nitrate as the nitrogen base material and as the melt carrier to combine with phosphorus and potassium. A certain proportion of solid powdered materials such as phosphorus and potassium are added to the liquid melt carrier and mixed with it. Under the temperature of the melt itself and the action of mechanical stirring, it rapidly combines into a low-temperature eutectic with a certain degree of fluidity. Then, it is granulated by spraying through differential granulation nozzles. The granulation principle and process after the composite melt exits the granulation nozzles are the same as the manufacturing process of tower urea.

[0003] Because chemical production cannot be shut down for long periods and requires uninterrupted production, and granulators have a high failure rate during long-term production and require frequent inspection and maintenance, in order to avoid long-term shutdowns caused by the inability to perform spray granulation during granulator maintenance, the high-tower compound fertilizer melt granulation process currently generally adopts a quick switching device with one on and one on standby.

[0004] Traditional switching methods involve mounting two granulators on a rotating frame. The granulator positions are quickly switched by rotating the frame. The granulator in the working position needs to connect with external equipment for spray granulation, and is therefore usually in a low position. When rotating the frame, the working granulator needs to be detached from the external equipment and raised to a higher position to avoid interfering with the frame's rotation. The standby granulator, after being rotated to the working position, needs to be lowered to a low position to connect with the external equipment. Existing switching devices use hydraulic cylinders for lifting the granulators, as disclosed in Chinese invention patent application CN117258682A, or electric hoists, as disclosed in Chinese utility model patent CN205398505. While these methods achieve granulator lifting, a malfunction in the drive mechanism can easily cause the granulator to fall, posing a safety hazard, and they also occupy a significant amount of space. Utility Model Content

[0005] To address the shortcomings of existing technologies and provide a safe, reliable, and compact granulator switching device, the technical solution adopted in this utility model is as follows:

[0006] The granulator switching device includes:

[0007] The frame and the rotating mechanism that enables the frame to rotate;

[0008] A pair of granulators, each capable of rising and falling along the frame, are slidably mounted on the frame.

[0009] A pair of lifting mechanisms are provided on the frame to lift each granulator separately;

[0010] The lifting mechanism includes a motor, a worm gear mechanism, a sprocket shaft, and a chain. The output end of the motor is connected to the worm in the worm gear mechanism, the output end of the worm gear mechanism is connected to the sprocket shaft, and the chain is mounted on the sprocket shaft with its first end connected to the granulator.

[0011] Furthermore, a counterweight is connected to the second end of the chain.

[0012] Furthermore, the counterweight and granulator are slidably or rollingly mounted on the frame.

[0013] Furthermore, at least two sprockets are provided on the sprocket shaft, and the number of chains matches the number of sprockets.

[0014] Furthermore, limit switches are installed on the frame to limit the lifting and lowering height of each granulator.

[0015] The granulator switching device uses a motor-driven worm gear mechanism to lift the granulator via sprockets and chains. The worm gear reduces speed, ensuring a stable lifting speed. The worm gear also has a self-locking capability, effectively preventing the granulator from rapidly falling in case of malfunction, thus improving safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the switching mechanism of the granulator;

[0017] Figure 2 This is a schematic diagram of the other side of the granulator switching mechanism;

[0018] Figure 3 This is a schematic diagram showing the assembly of the granulator and the frame.

[0019] Figure 4 A schematic diagram of the worm gear mechanism and sprocket shaft assembly;

[0020] Figure 5 This is a schematic diagram of the granulator structure;

[0021] Figure 6 This is a schematic diagram of the rotating mechanism.

[0022] In the attached image:

[0023] 1. Frame;

[0024] 2. Rotating mechanism;

[0025] 2-1. Shaft;

[0026] 2-2, Sleeve;

[0027] 2-3. Bearings;

[0028] 2-4. Baffle;

[0029] 2-5, Stop;

[0030] 3. Granulator;

[0031] 3-1. Main Body;

[0032] 3-2. Feed pipe;

[0033] 3-3. Sprayer head;

[0034] 4. Lifting mechanism;

[0035] 4-1. Electric motor;

[0036] 4-2. Worm gear mechanism;

[0037] 4-2a worm gear;

[0038] 4-2b, Worm gear;

[0039] 4-3, Sprocket Shaft;

[0040] 4-3a sprocket;

[0041] 4-4. Chain;

[0042] 4-4a First end;

[0043] 4-4b, Second end;

[0044] 5. Counterweight;

[0045] 6. Limit switches;

[0046] 7. Rollers;

[0047] 8. Grooved wheel. Detailed Implementation

[0048] To better understand the concept of this invention, the technical solution of this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] like Figure 1 and Figure 2 The granulator switching device shown includes a frame 1, which is vertically mounted on a rotating mechanism 2, allowing the frame 1 to rotate on the rotating mechanism 2.

[0050] The aforementioned rotating mechanism 2 is manual in this embodiment, such as... Figure 6 Specifically, the mechanism includes a rotating shaft 2-1 and a sleeve 2-2. The rotating shaft 2-1 is independently mounted on the base A, and the sleeve 2-2 is connected to the frame 1 and fitted onto the rotating shaft 2-1. A bearing 2-3 is installed between the rotating shaft 2-1 and the sleeve 2-2 to reduce resistance during rotation. To position the frame 1 after rotation and prevent over-rotation, a baffle 2-4 is also installed on the frame 1, which cooperates with a stop block 2-5 fixed on the base A. After the frame 1 rotates to its position, the stop block 2-5 blocks the baffle 2-4, keeping the frame 1 rotated to the specific position. Of course, in addition to the manual rotation method described above, the rotating mechanism 2 can also adopt an automatic rotation method, such as using a motor to drive the turntable rotation as in existing technology.

[0051] Two granulators 3 are installed on the frame 1. The two granulators 3 are symmetrically arranged on both sides of the frame 1 with the frame 1's rotation axis as the center, and both granulators 3 can be raised and lowered along the height of the frame 1. One granulator 3 is in the working position, and the other is in the standby position. When it is necessary to switch granulators 3, the positions of the two granulators 3 can be interchanged by rotating the frame 1. Since the granulator 3 in the working position needs to be connected to external equipment, the granulator 3 in the working position must be disconnected from the external equipment when switching granulators 3. The standby granulator 3 needs to be connected with external equipment before it can perform spray granulation. Therefore, the frame 1 is equipped with lifting mechanisms 4 that can drive each granulator 3 to rise and fall. When switching granulators, the lifting mechanism 4 lifts the granulator 3 in the working position to a reasonable position. Then, the frame 1 is rotated to rotate the standby granulator 3 to the working position. Then, the lifting mechanism 4 lowers the granulator 3 in the working position to the position to connect with the external equipment, so that the granulator 3 can complete the connection with the external equipment, thereby completing the switching of the granulator 3.

[0052] The lifting mechanism 4 configured in all the above granulators is the same, and is as follows: Figure 3 and Figure 4 The device includes a motor 4-1, a worm gear mechanism 4-2, a sprocket shaft 4-3, and a chain 4-4. The output end of the motor 4-1 is connected to the worm 4-2a in the worm gear mechanism 4-2, and the output end of the worm wheel 4-2b in the worm gear mechanism 4-2 is connected to the sprocket shaft 4-3. The first end 4-4a of the chain 4-4 is connected to the granulator 3, and the chain 4-4 rests on the sprocket 4-3a of the sprocket shaft 4-3, allowing the second end 4-4b to hang freely. During operation, the motor drives the worm gear mechanism to rotate the sprocket shaft, thereby causing the first end 4-4a of the chain 4-4 to move the granulator 3 up and down. Because the worm gear mechanism 4-2a has a self-locking function, even if the motor suddenly stops or malfunctions, it can still keep the granulator 3 in its current position to prevent it from falling. Furthermore, the deceleration function of the worm gear mechanism provides a smooth lifting speed, ensuring the smooth lifting of the granulator.

[0053] To further reduce the load on the motor, a counterweight 5 can be configured at the second end 4-4b of the chain 4-4 to balance the weight of the granulator 3.

[0054] To ensure smooth movement of the granulator 3 and counterweight 5 during lifting and lowering, a pair of rollers 7 are installed on the granulator 3 to clamp the frame 1, thus keeping the granulator 3 stable during lifting and lowering along the frame 1. Similarly, the counterweight 5 is supported on the frame 1 by a pair of grooved wheels 8 and also moves up and down along the frame 1 to maintain stability. Of course, guide rods or guide rails can also be used to coordinate the granulator 3 and counterweight 5 with the frame to improve operational stability.

[0055] To avoid safety hazards caused by chain breakage, the safety factor can be increased by increasing the number of chains 4-4. As shown in this embodiment, two chains 4-4 are connected to the granulator 3, and two sprockets 4-3a on the matching sprocket shaft 4-3 are also adapted to be set for overlapping of each chain 4-4.

[0056] To control the lifting and lowering height of the granulator 3, a pair of limit switches 6 are configured on the frame 1 corresponding to each granulator 3 to limit the upper and lower heights of each granulator 3. Alternatively, the upper and lower heights of the granulator 3 can be controlled by obtaining the rotation angle of the motor 4-1, but for further safety or when using a conventional motor, the use of limit switches 6 is safer and more reliable. To further improve the reliability of the limit switches 6, a pair of limit switches 6 can be set for each of the upper and lower limits for limit control.

[0057] The above-mentioned granulator 3, as Figure 5 The device includes a main body 3-1, a feed pipe 3-2 connected to the main body 3-1, and a nozzle 3-3 located below the main body 3-1 for docking with external equipment. When the granulator is rotated to the working position, the lifting mechanism 4 lowers the granulator so that the nozzle docks with the external equipment, and the conveying pipe is connected to the feed pipe to start working.

Claims

1. Granulator switching device, including: A frame (1) and a rotating mechanism (2) that supports the frame (1) and enables the frame (1) to perform a rotating motion; A pair of granulators (3) are slidably arranged on the frame (1) and can be raised and lowered along the frame (1); A pair of lifting mechanisms (4) are arranged on the frame (1) and are capable of lifting each granulator (3) respectively; Features: The lifting mechanism (4) comprises a motor (4-1), a worm gear mechanism (4-2), a sprocket shaft (4-3) and a chain (4-4); the output end of the motor (4-1) is connected to the worm in the worm gear mechanism (4-2); the output end of the worm gear mechanism (4-2) is connected to the sprocket shaft (4-3); the chain (4-4) is mounted on the sprocket of the sprocket shaft (4-3) and the first end is connected to the granulator (3).

2. The granulator switching device according to claim 1, characterized in that: The second end of the chain (4-4) is connected to a counterweight block (5).

3. The granulator switching device according to claim 2, characterized in that: The counterweight block (5) and the rotating mechanism (2) are slidably or rollingly arranged on the frame (1).

4. The granulator switching device according to claim 1, characterized in that: At least two sprockets are arranged on the sprocket shaft (4-3), and the number of the chains (4-4) matches the number of the sprockets.

5. The granulator switching device according to claim 1, characterized in that: A limit switch (6) for limiting the lifting and lowering height of each granulator (3) is arranged on the frame (1).

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