A granulator cleanliness anomaly alarm device that facilitates maintenance

Abstract

The utility model discloses a kind of granulator cleanliness abnormal alarm equipment convenient to maintain, it is related to granulator technical field, including granulator body and filter box, the left side of granulator body is equipped with filter box, the top of filter box is equipped with protective box, the top of filter box is equipped with alarm, the right side of the top of protective box is equipped with protective cover by rotating component;The left side of filter box is equipped with exhaust fan, the right side of T-shaped block is all provided with fixed strip.The granulator cleanliness abnormal alarm equipment convenient to maintain, differential pressure switch device is monitored the air pressure difference of the both sides of filter screen body by first air pressure collection pipe and second air pressure collection pipe, when the pressure difference exceeds threshold value, PLC controller triggers alarm to send alarm, timely reminds staff to clean or replace filter screen body, avoid the equipment efficiency decline or failure caused by dust blockage, ensure that granulator continues stable operation.

Description

Technical Field

[0001] This utility model relates to the field of granulator technology, specifically to a granulator cleanliness abnormality alarm device that is easy to maintain. Background Technology

[0002] Granulators are key equipment in industries such as plastics, chemicals, and pharmaceuticals. They process molten materials into granules of specific shapes, and their operational stability directly affects product quality and production efficiency. During the granulation process, a large amount of dust is generated. Filtering devices prevent dust pollution of the environment, avoid operators inhaling dust and harming their health, and reduce the risk of mechanical wear or short circuits caused by dust adhering to the equipment surface.

[0003] For example, Chinese utility model patent application number 202323418447.4 discloses a cleanliness abnormality alarm device for a granulator. This device uses a wind speed sensor in the filter housing to detect the wind speed inside. When the filter plate is clogged, the wind speed decreases, activating the power to an audible and visual alarm. This allows for timely alarm activation when the filter plate needs replacement, reminding staff to replace it and ensuring the cleanliness of the granulator. However, this device still has certain shortcomings. The filter plates are not easy to remove and replace directly, resulting in poor installation stability. This makes it time-consuming and labor-intensive for staff to inspect and replace the filter plates.

[0004] Therefore, we propose an easy-to-maintain granulator cleanliness abnormality alarm device to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a granulator cleanliness abnormality alarm device that is easy to maintain, so as to solve the problem mentioned in the background art that the filter plate is not easy to be directly disassembled and replaced, resulting in poor installation stability of the filter plate, which makes it time-consuming and laborious for workers to inspect and replace the filter plate.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a granulator cleanliness abnormality alarm device that is easy to maintain, comprising a granulator body and a filter box. The filter box is installed on the left side of the granulator body, and a protective box is installed above the filter box. A differential pressure switch device is installed inside the protective box. An alarm is installed above the filter box. A protective cover is installed on the upper right side of the protective box via a rotating component, and a lighting lamp is installed on the lower surface of the protective cover. An exhaust fan is installed on the left side of the filter box, and T-shaped blocks are installed on both the upper and lower sides of the filter box. A fixing strip is provided on the right side of each T-shaped block, and a filter screen body is provided between the fixing strip and the T-shaped block. A threaded rod is installed on the left side of the filter box through a bearing seat, and a fixing frame is installed on the threaded rod.

[0007] Preferably, the differential pressure switch device is fixed on the upper surface of the filter box, and a first air pressure sampling tube and a second air pressure sampling tube are respectively installed on the left and right sides of the differential pressure switch device. The lengths of the first air pressure sampling tube and the second air pressure sampling tube are set according to the airflow position.

[0008] With the above structural design, the differential pressure switch device collects the air pressure on both sides of the filter body through the first air pressure collection tube and the second air pressure collection tube respectively. The cleanliness of the filter body is judged based on the air pressure difference, providing data basis for alarm triggering. The lengths of the first air pressure collection tube and the second air pressure collection tube are adapted to the airflow path to ensure accurate monitoring.

[0009] Preferably, both the first and second air pressure sampling pipes are located inside the filter box, with the first air pressure sampling pipe located on the left side of the filter body and the second air pressure sampling pipe located on the right side of the filter body. Sealing rings are provided at the connection points between the first and second air pressure sampling pipes and the filter box.

[0010] With the above structural design, the first air pressure acquisition tube is located on the left side of the filter body, and the second air pressure acquisition tube is located on the right side, directly acquiring the air pressure difference before and after filtration; the sealing ring ensures the airtightness of the connection between the first and second air pressure acquisition tubes and the filter box, avoiding interference from external airflow with the monitoring accuracy.

[0011] Preferably, the alarm is connected to a PLC controller, and the PLC controller is connected to a differential pressure switch device.

[0012] With the above structural design, the differential pressure switch device transmits the air pressure difference signal to the PLC controller. When the difference exceeds the set threshold, the controller triggers the alarm to issue an audible and visual alarm, realizing automatic early warning of abnormal cleanliness.

[0013] Preferably, the upper surface of the protective box is equipped with an embedded magnetic sheet, which is attracted to the protective cover, and the protective cover is attracted to the fixed magnetic block.

[0014] With the above structural design, the protective cover is fixed to the protective box by an embedded magnetic sheet when closed, and can be attached to the protective cover by a fixing magnetic block when opened, preventing it from shaking and facilitating the inspection and maintenance of the internal differential pressure switch device.

[0015] Preferably, the exhaust fan is equipped with an air inlet pipe and an air outlet pipe on its front and rear sides, respectively, and the air inlet pipe is connected to the interior of the filter box.

[0016] With the above structural design, the exhaust fan draws the dust-laden airflow generated by the granulator body into the filter box through the air inlet pipe, and the filtered clean air is discharged through the air outlet pipe, forming an airflow circulation to ensure effective dust filtration.

[0017] Preferably, the fixed frame is slidably connected to the filter box and the T-shaped block, the fixed frame does not overlap with the first air pressure collection tube, a guide rod is installed on the left side of the filter box, the guide rod passes through the fixed frame, the fixed frame is slidably connected to the guide rod, and a sealing gasket is provided at the connection position between the fixed frame and the filter box.

[0018] With the above structural design, the rotating threaded rod drives the fixed frame to slide along the guide rod, pressing or releasing the filter screen body. The T-shaped block and the fixing strip enable quick assembly and disassembly of the filter screen body. The sealing gasket ensures the sealing between the fixed frame and the filter box, preventing leakage of unfiltered airflow.

[0019] Compared with the prior art, the beneficial effects of this utility model are: this easy-to-maintain granulator cleanliness abnormality alarm device: 1. Precise early warning of abnormal cleanliness to ensure stable equipment operation: The differential pressure switch device monitors the air pressure difference on both sides of the filter body in real time through the first and second air pressure acquisition tubes. When the pressure difference exceeds the threshold, the PLC controller triggers the alarm to issue an alarm, promptly reminding the staff to clean or replace the filter body, avoiding equipment efficiency reduction or failure due to dust blockage, and ensuring the continuous and stable operation of the granulator.

[0020] 2. Improved maintenance convenience and reduced operating costs: The protective cover opens and closes via a rotating assembly, and is securely fixed with embedded magnetic sheets and fixing magnetic blocks. The lighting provides illumination for internal maintenance, facilitating the maintenance of the differential pressure switch device. The rotating threaded rod can drive the fixing frame to slide along the guide rod, quickly pressing or loosening the filter body. Combined with the positioning of the T-shaped block and fixing strip, the disassembly and assembly process of the filter body is greatly simplified, reducing maintenance time and labor costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall main structure of this utility model; Figure 2 This is a schematic diagram of the structure of the protective cover of this utility model when it is opened; Figure 3 This is a schematic diagram of the overall left-side structure of the filter box of this utility model; Figure 4 This is a schematic diagram of the internal structure of the filter box of this utility model; Figure 5 This is a schematic diagram of the position and structure of the differential pressure switch device of this utility model.

[0022] In the diagram: 1. Granulator body; 2. Filter box; 3. Protective box; 4. Differential pressure switch device; 5. First air pressure acquisition pipe; 6. Second air pressure acquisition pipe; 7. Alarm; 8. Embedded magnetic sheet; 9. Rotating assembly; 10. Protective cover; 11. Lighting lamp; 12. Fixing magnetic block; 13. Exhaust fan; 14. Air inlet pipe; 15. Air outlet pipe; 16. T-shaped block; 17. Fixing strip; 18. Filter screen body; 19. Threaded rod; 20. Fixing frame; 21. Guide rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5This utility model provides a technical solution: an easy-to-maintain granulator cleanliness abnormality alarm device, including a granulator body 1, a filter box 2, a protective box 3, a differential pressure switch device 4, a first air pressure acquisition pipe 5, a second air pressure acquisition pipe 6, an alarm 7, an embedded magnetic sheet 8, a rotating assembly 9, a protective cover 10, a lighting lamp 11, a fixing magnetic block 12, an exhaust fan 13, an air inlet pipe 14, an air outlet pipe 15, a T-shaped block 16, a fixing strip 17, a filter screen body 18, a threaded rod 19, a fixing frame 20, and a guide rod 21. The filter box 2 is installed on the left side of the granulator body 1, and the protective box 3 is installed above the filter box 2. The differential pressure switch device 4 is installed inside the protective box 3. The differential pressure switch device 4 is fixed to the upper surface of the filter box 2, and a first air pressure sampling pipe 5 and a second air pressure sampling pipe 6 are respectively installed on the left and right sides of the differential pressure switch device 4. The lengths of the first air pressure sampling pipe 5 and the second air pressure sampling pipe 6 are set according to the airflow position. The differential pressure switch device 4 collects the air pressure on both sides of the filter body 18 through the first air pressure sampling pipe 5 and the second air pressure sampling pipe 6, respectively, and judges the cleanliness of the filter body 18 based on the air pressure difference, providing data basis for alarm triggering. The lengths of the first air pressure sampling pipe 5 and the second air pressure sampling pipe 6 are adapted to the airflow path to ensure accurate monitoring. Both the first air pressure sampling pipe 5 and the second air pressure sampling pipe 6 are located inside the filter box 2, and The first air pressure sampling pipe 5 is located on the left side of the filter body 18, and the second air pressure sampling pipe 6 is located on the right side of the filter body 18. Sealing rings are installed at the connection points between the first air pressure sampling pipe 5 and the second air pressure sampling pipe 6 and the filter box 2. The first air pressure sampling pipe 5 is located on the left side of the filter body 18, and the second air pressure sampling pipe 6 is located on the right side, directly acquiring the air pressure difference before and after filtration. The sealing rings ensure the airtightness of the connection between the first air pressure sampling pipe 5 and the second air pressure sampling pipe 6 and the filter box 2, preventing external airflow from interfering with the monitoring accuracy. An alarm 7 is installed on the top of the filter box 2. The alarm 7 is connected to a PLC controller, and the PLC controller is connected to a differential pressure switch device 4. Device 4 transmits the air pressure difference signal to the PLC controller. When the difference exceeds the set threshold, the controller triggers the alarm 7 to issue an audible and visual alarm, realizing automatic early warning of abnormal cleanliness. A protective cover 10 is installed on the upper right side of the protective box 3 via a rotating component 9, and a light 11 is installed on the lower surface of the protective cover 10. An embedded magnetic sheet 8 is installed on the upper surface of the protective box 3. The embedded magnetic sheet 8 is attracted to the protective cover 10, and the protective cover 10 is attracted to the fixed magnetic block 12. When the protective cover 10 is closed, it is attracted and fixed to the protective box 3 by the embedded magnetic sheet 8. When it is open, it can be attracted to the protective cover 10 by the fixed magnetic block 12 to avoid random shaking and facilitate the inspection and maintenance of the internal differential pressure switch device 4.

[0025] A blower 13 is installed on the left side of the filter box 2. An inlet pipe 14 and an outlet pipe 15 are installed on the front and rear sides of the blower 13, respectively. The inlet pipe 14 is connected to the interior of the filter box 2. The blower 13 draws the dust-laden airflow generated by the granulator body 1 into the filter box 2 through the inlet pipe 14. The filtered clean air is discharged through the outlet pipe 15, forming an airflow circulation to ensure effective dust filtration. T-shaped blocks 16 are installed on both the upper and lower sides of the interior of the filter box 2. A fixing strip 17 is provided on the right side of each T-shaped block 16, and a filter screen body 18 is positioned between the fixing strip 17 and the T-shaped block 16. A threaded rod 19 is installed on the left side of the filter box 2 via a bearing seat. A fixed frame 20 is installed on the rod 19. The fixed frame 20 is slidably connected to the filter box 2 and the T-shaped block 16. The fixed frame 20 does not overlap with the first air pressure collection tube 5. A guide rod 21 is installed on the left side of the filter box 2. The guide rod 21 passes through the fixed frame 20. The fixed frame 20 is slidably connected to the guide rod 21. Sealing gaskets are provided at the connection positions between the fixed frame 20 and the filter box 2. Rotating the threaded rod 19 drives the fixed frame 20 to slide along the guide rod 21, pressing or loosening the filter screen body 18. With the cooperation of the T-shaped block 16 and the fixing strip 17, the filter screen body 18 can be quickly disassembled and assembled. The sealing gaskets ensure the sealing between the fixed frame 20 and the filter box 2 to prevent the leakage of unfiltered airflow.

[0026] It should be noted that the differential pressure switch device 4 in this application is a well-known prior art in the field and there are finished products available. Therefore, its internal structure and working principle will not be described in detail here.

[0027] Working principle: When using this easy-to-maintain granulator cleanliness abnormality alarm device, first, start the exhaust fan 13 on the left side of the filter box 2. The dust-laden airflow generated by the granulator body 1 is drawn into the filter box 2 through the air inlet pipe 14. After the airflow is filtered by the filter screen body 18, the clean air is discharged from the air outlet pipe 15, forming a stable dust filtration cycle.

[0028] The differential pressure switch device 4 inside the protective box 3 monitors the air pressure on the left and right sides of the filter body 18 through the first air pressure acquisition tube 5 and the second air pressure acquisition tube 6 respectively. The air pressure difference collected by the two is transmitted to the PLC controller in real time. When the differential pressure of the filter body 18 exceeds the set threshold due to dust blockage, the PLC controller triggers the alarm 7 on the top of the granulator body 1 to issue an audible and visual alarm, reminding the staff to perform maintenance.

[0029] When the filter body 18 needs to be replaced or cleaned, rotate the threaded rod 19 on the left side of the filter box 2 to drive the fixed frame 20 to slide to the left along the guide rod 21, thereby loosening the pressure on the filter body 18. The filter body 18 is positioned by the T-block 16 and the fixing strip 17 and can be directly pulled out for replacement. After the operation is completed, rotate the threaded rod 19 in the opposite direction to reset the fixed frame 20. The sealing gasket ensures the airtightness of the filter box 2.

[0030] When maintaining the differential pressure switch device 4, the protective cover 10 is opened by rotating the assembly 9. The protective cover 10 can be fixed by the fixing magnet 12 to prevent shaking. The lower surface lighting lamp 11 is turned on to provide light. After maintenance, the protective cover 10 is closed and fixed by the embedded magnetic sheet 8 to the protective box 3. The protective box 3 protects the differential pressure switch device 4. The whole process realizes accurate early warning of cleanliness abnormalities and convenient maintenance of equipment, thus completing a series of tasks. The contents not described in detail in this specification are prior art known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A granulator cleanliness abnormality alarm device that is easy to maintain, comprising a granulator body (1) and a filter box (2), wherein the filter box (2) is installed on the left side of the granulator body (1), characterized in that: A protective box (3) is installed above the filter box (2), and a differential pressure switch device (4) is installed inside the protective box (3). An alarm (7) is installed above the filter box (2). A protective cover (10) is installed on the upper right side of the protective box (3) via a rotating assembly (9), and a lighting lamp (11) is installed on the lower surface of the protective cover (10). A fan (13) is installed on the left side of the filter box (2), and T-shaped blocks (16) are installed on both the upper and lower sides of the filter box (2). A fixing strip (17) is provided on the right side of the T-shaped blocks (16), and a filter screen body (18) is provided between the fixing strip (17) and the T-shaped blocks (16). A threaded rod (19) is installed on the left side of the filter box (2) through a bearing seat, and a fixing frame (20) is installed on the threaded rod (19).

2. The easy-to-maintain granulator cleanliness abnormality alarm device according to claim 1, characterized in that: The differential pressure switch device (4) is fixed on the upper surface of the filter box (2), and a first air pressure collection pipe (5) and a second air pressure collection pipe (6) are respectively installed on the left and right sides of the differential pressure switch device (4). The lengths of the first air pressure collection pipe (5) and the second air pressure collection pipe (6) are set according to the air flow position.

3. The easy-to-maintain granulator cleanliness abnormality alarm device according to claim 2, characterized in that: The first air pressure collection tube (5) and the second air pressure collection tube (6) are both located inside the filter box (2), and the first air pressure collection tube (5) is located on the left side of the filter screen body (18), and the second air pressure collection tube (6) is located on the right side of the filter screen body (18). The connection positions of the first air pressure collection tube (5) and the second air pressure collection tube (6) with the filter box (2) are both provided with sealing rings.

4. The easy-to-maintain granulator cleanliness abnormality alarm device according to claim 1, characterized in that: The alarm (7) is connected to the PLC controller, and the PLC controller is connected to the differential pressure switch (4).

5. The easy-to-maintain granulator cleanliness abnormality alarm device according to claim 1, characterized in that: The upper surface of the protective box (3) is equipped with an embedded magnetic sheet (8), which is attracted to the protective cover (10), and the protective cover (10) is attracted to the fixed magnetic block (12).

6. The easy-to-maintain granulator cleanliness abnormality alarm device according to claim 1, characterized in that: The exhaust fan (13) has an air inlet pipe (14) and an air outlet pipe (15) installed on its front and rear sides respectively. The air inlet pipe (14) is connected to the interior of the filter box (2).

7. The easy-to-maintain granulator cleanliness abnormality alarm device according to claim 1, characterized in that: The fixed frame (20) is slidably connected to the filter box (2) and the T-shaped block (16). The fixed frame (20) does not overlap with the first air pressure collection tube (5). A guide rod (21) is installed on the left side of the filter box (2). The guide rod (21) passes through the fixed frame (20). The fixed frame (20) and the guide rod (21) are slidably connected. Sealing gaskets are provided at the connection positions of the fixed frame (20) and the filter box (2).

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