Pulse blowback anti-blocking sieve device for square rocking sieve

Abstract

The utility model discloses a pulse blowback anti-blocking screen device for a square rocking screen, which relates to the technical field of powder screening equipment and comprises a sealed screen box structure, and a rocking screen body is arranged in the sealed screen box structure. The swing screen further comprises a nozzle pipe set arranged above the swing screen body, the nozzle pipe set comprises a plurality of installation rods connected between the inner walls of the sealed screen box structure in parallel, blowing air nozzles are connected to the installation rods, and the blowing direction of the blowing air nozzles faces the swing screen body. The pulse air source system is arranged outside the sealed screen box structure, an air supply pipeline of the pulse air source system is connected with the blowing air nozzle, and short-frequency repeated blowing cleaning of the blowing air nozzle to the swinging screen body is achieved through control of the pulse air source system. The pulse air source system is used for controlling the blowing air nozzles to conduct short-frequency repeated blowing cleaning on the swinging screen body, screen holes can be effectively prevented from being blocked, and the screening efficiency is improved. And the condition that frequent shutdown for manual cleaning is needed due to screen hole blockage is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of powder screening equipment, and more specifically to a square oscillating screen pulse backflushing anti-clogging screen device, which is particularly suitable for screening materials with fine powder of 80 mesh or above and with stickiness. Background Technology

[0002] Traditional square gyratory screens present numerous technical challenges when processing viscous powders. When screening fine powders of 80 mesh or higher, viscous materials tend to form bridging at the screen openings, leading to severe clogging with a clogging rate as high as 60%-80%. This clogging significantly reduces the effective screening area, resulting in a 30%-50% decrease in throughput and severely impacting screening efficiency.

[0003] Furthermore, conventional bouncing ball screen cleaning devices are ineffective at cleaning sticky materials, requiring frequent shutdowns for manual cleaning. This not only increases labor intensity but also reduces production efficiency. Moreover, the accumulation of sticky materials accelerates screen fatigue and damage, shortening the screen's lifespan to one-third of its normal operating time, thus increasing production costs.

[0004] Square gyratory screens are inherently difficult to disassemble, resulting in significant time waste during assembly and disassembly. Furthermore, this type of screen is not a vibrating screen, and its mesh cannot withstand repeated vibration cleaning. While the bouncing balls possess some elasticity, the shaking of the screen is insufficient to generate strong bounce; even if strong bounce were produced, it would damage the screen. Therefore, traditional cleaning methods cannot meet the requirements for screening viscous powders, necessitating a new technological solution to address these issues. Utility Model Content

[0005] In view of this, the present invention provides a square swing screen pulse backflushing anti-clogging screen device, which aims to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A square gyratory screen pulse backflushing anti-clogging device includes: a sealed screen box structure, wherein the sealed screen box structure houses the gyratory screen body; and further includes:

[0008] A nozzle assembly is provided above the gyratory screen body. The nozzle assembly includes multiple mounting rods that are connected in parallel between the inner walls of the sealed screen box structure. Air nozzles are connected to the mounting rods, and the air blowing direction of the air nozzles is towards the gyratory screen body.

[0009] A pulse air source system is located outside the sealed screen box structure. The air supply pipeline of the pulse air source system is connected to the blow nozzle, and the blow nozzle is used to clean the oscillating screen body by short-frequency multiple blows through the control of the pulse air source system.

[0010] Through the above technical solution, this utility model uses a pulse air source system to control the jet nozzles to perform short-frequency, multiple air blowing to clean the gyratory screen body, effectively preventing screen hole clogging and improving screening efficiency. It avoids material blockage caused by screen hole clogging, thus ensuring screening accuracy and quality. It also reduces the need for frequent machine shutdowns for manual cleaning due to screen hole clogging, lowering labor intensity and improving production efficiency.

[0011] Preferably, in the above-mentioned square gyratory screen pulse backflushing anti-clogging device, the multiple mounting rods are spaced at the same interval, and each mounting rod is connected to multiple air nozzles. The blowing directions of the multiple air nozzles on each mounting rod form an acute angle with the vertical plane, and the blowing directions of the multiple air nozzles on each mounting rod are arranged alternately and in opposite directions. The acute angles formed by the blowing directions of the air nozzles with the vertical plane and their alternate and opposite arrangement allow the airflow to cover the surface of the gyratory screen body more evenly, improving the cleaning effect. The alternate and opposite blowing directions generate stronger airflow disturbance, which is more conducive to removing sticky materials in the screen holes and further reducing the screen hole clogging rate.

[0012] Preferably, in the above-mentioned square oscillating screen pulse backflushing anti-clogging device, multiple mounting rods are arranged in pairs. Multiple air nozzles are connected to the two mounting rods in the same pair. The air nozzles on the two mounting rods are arranged alternately, each forming an acute angle with the vertical plane, and the air blowing directions are opposite. The alternate arrangement of air nozzles on the two-by-two mounting rods with opposite air blowing directions further enhances the uniformity and disturbance effect of the airflow, making the cleaning more thorough. Compared to a single mounting rod, the design of two mounting rods per pair provides more stable support, enhances the structural stability of the nozzle assembly, and ensures the stable position of the air nozzles during operation.

[0013] Preferably, in the above-mentioned square gyratory screen pulse backflushing anti-clogging screen device, two mounting rods of the same group are rotatably connected to the sealed screen box structure, and their ends are locked with nuts, thereby realizing the angle adjustment of the blowing nozzle. The rotatable connection of the two mounting rods of the same group to the sealed screen box structure and the locking with nuts allows for the adjustment of the blowing nozzle angle, enabling the blowing nozzle to flexibly adjust the blowing angle according to different material characteristics and screening requirements to achieve the best cleaning effect. The adjustable angle design increases the versatility and adaptability of the device, allowing it to better adapt to various types of material screening operations and improving the applicability range of the device.

[0014] Preferably, in the above-mentioned square gyratory screen pulse backflushing anti-clogging device, the jet nozzle is a duckbill-type nozzle structure. The duckbill-type nozzle structure has a larger jetting area and a more uniform airflow distribution, which can more effectively remove sticky materials from the screen holes, further improving the cleaning effect. Compared with other types of nozzles, the airflow emitted by the duckbill-type nozzle is relatively gentle, which can reduce the impact on the gyratory screen body and the screen mesh, extending the service life of the screen mesh.

[0015] Preferably, the above-mentioned square gyratory screen pulse backflushing anti-clogging device further includes a negative pressure suction system located at the top of the sealed screen box structure. This negative pressure suction system is used to remove dust generated during the cleaning process of the gyratory screen body. The negative pressure suction system can promptly remove dust generated during the cleaning process, maintaining the cleanliness of the screen box interior, reducing dust contamination of materials, and improving product quality. It also reduces the diffusion of dust within the screen box, lowers the dust concentration in the working environment, and is beneficial to the health of operators, as well as the normal operation and maintenance of the equipment.

[0016] Preferably, in the above-mentioned square gyratory screen pulse backflushing anti-clogging device, the pulse air source system includes an air pump, a solenoid valve, and a pulse controller; the air inlet of the air pump is connected to the external environment; the air inlet of the solenoid valve is connected to the pump outlet of the air pump, and the air outlet of the solenoid valve is connected to the blowing nozzle through the air supply pipeline; the pulse controller is electrically connected to the control terminal of the solenoid valve. The pulse air source system, including the air pump, solenoid valve, and pulse controller, enables short-frequency, multiple-blow cleaning of the blowing nozzle through the control of the solenoid valve by the pulse controller, achieving automated control of the cleaning process and improving work efficiency. The coordinated operation of all components ensures the stable operation of the pulse air source system, providing a stable air source for the blowing nozzle and guaranteeing the stability and reliability of the cleaning effect. Preferably, in the above-mentioned square gyratory screen pulse backflushing anti-clogging device, the pulse air source system also includes an air storage tank connected between the air pump and the solenoid valve, and a pressure gauge is installed between the air storage tank and the solenoid valve. The air tank stores a certain amount of compressed air, which buffers and stabilizes the air source pressure, making the air pressure more stable during the blowing process and improving the consistency of the cleaning effect. The installation of a pressure gauge facilitates real-time monitoring of the air source pressure. Operators can adjust the air pump's operating status promptly based on the pressure gauge reading, ensuring the pulse air source system operates within the appropriate pressure range and extending the equipment's service life.

[0017] Preferably, in the above-mentioned square oscillating screen pulse backflushing anti-clogging screen device, the air supply pipeline includes multiple branch hoses, which are connected to multiple air nozzles. The use of multiple branch hoses to connect multiple air nozzles in the air supply pipeline allows for a more flexible layout of the air nozzles, which can be adjusted according to the size and shape of the screen box, improving the adaptability and versatility of the device. The branch hose design reduces airflow loss during transmission, ensuring that each air nozzle receives sufficient air pressure and improving the cleaning effect.

[0018] Preferably, in the above-mentioned square gyratory screen pulse backflushing anti-clogging device, the pulse air source system further includes a power supply, which powers the air pump and the pulse controller. The power supply provides stable power to the air pump and pulse controller, ensuring the normal operation of the pulse air source system and guaranteeing that the blowing nozzles can perform air blowing and cleaning according to the set frequency and pressure, thus improving the reliability and stability of the equipment. Through reasonable power supply design and control, precise power supply to the air pump and pulse controller can be achieved, avoiding unnecessary energy waste and reducing the operating cost of the equipment.

[0019] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a square gyratory screen pulse backflushing anti-clogging device, which has the following beneficial effects:

[0020] 1. Significantly reduces screen clogging rate: Through the pulse air source system and the optimized nozzle assembly, sticky materials in the screen holes can be effectively removed, significantly reducing the clogging rate and thus greatly improving screening efficiency and quality.

[0021] 2. Improve screening efficiency and throughput: It solves the problem of frequent screen clogging when traditional gyratory screens are used to process sticky fine powders. The effective screening area is significantly increased and the throughput is greatly improved. It is especially suitable for high-precision screening operations in industries such as traditional Chinese medicine and food.

[0022] 3. Extended screen life: The optimized air nozzle design and pulse cleaning method reduce the impact and damage to the screen, significantly extending its life and reducing production costs.

[0023] 4. Reduced energy consumption and labor costs: Through automated control and optimized gas supply system, energy consumption during the cleaning process is reduced, the frequency and labor intensity of manual cleaning are decreased, and production efficiency is improved.

[0024] 5. Improve the versatility and adaptability of the equipment: The adjustable angle design of the blowing nozzle and the flexible nozzle tube layout enable the device to adapt to different types of materials and screening requirements, making it widely applicable.

[0025] 6. Improved working environment and product quality: The negative pressure suction system reduces the spread of dust during the cleaning process, lowers the dust concentration in the working environment, which is beneficial to the health of operators. At the same time, it reduces dust contamination of materials and improves product quality.

[0026] 7. Simple structure and easy maintenance: The overall device has a reasonable structural design, is easy to install and maintain, and the components work together stably and reliably, reducing the maintenance cost and workload of the equipment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 The attached figure is a system schematic diagram of the square swing screen pulse backflushing anti-clogging screen device (with top plate removed and equipped with pulse air source system) of Embodiment 1 provided by this utility model;

[0029] Figure 2 The attached figure is a schematic diagram of the nozzle tube assembly of Embodiment 1 provided by this utility model;

[0030] Figure 3 The attached figure is a structural schematic diagram of the mounting rod and the blowing nozzle of Embodiment 1 provided by this utility model;

[0031] Figure 4 The attached figure is a schematic diagram of the external structure of the square swing screen pulse backflushing anti-clogging screen device provided by this utility model;

[0032] Figure 5 The attached figure is a structural schematic diagram of the square swing screen pulse backflushing anti-clogging screen device (top plate removed) of Embodiment 2 provided by this utility model.

[0033] in:

[0034] 1-Sealed screen box structure;

[0035] 2-The main body of the gyratory screen;

[0036] 3- Nozzle assembly;

[0037] 31-Mounting rod; 32-Air nozzle; 33-Nut;

[0038] 4-Pulse gas source system;

[0039] 41-Gas supply line; 42-Air pump; 43-Solenoid valve; 44-Pulse controller; 45-Air tank; 46-Pressure gauge; 47-Branch hose; 48-Power supply;

[0040] 5- Negative pressure suction system. Detailed Implementation

[0041] 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.

[0042] See appendix Figure 1 To be continued Figure 3 This utility model discloses a square gyratory screen pulse backflushing anti-clogging device, including: a sealed screen box structure 1, within which a gyratory screen body 2 is provided; and further including:

[0043] The nozzle assembly 3 is located above the gyratory screen body 2. The nozzle assembly 3 includes multiple mounting rods 31 that are connected in parallel between the inner walls of the sealed screen box structure 1. The mounting rods 31 are connected to the air nozzles 32, and the air blowing direction of the air nozzles 32 is towards the gyratory screen body 2.

[0044] A pulse air source system 4 is located outside the sealed screen box structure 1. The air supply pipeline 41 of the pulse air source system 4 is connected to the blow nozzle 32. The blow nozzle 32 performs short-frequency multiple blow cleaning of the swing screen body 2 through the control of the pulse air source system 4.

[0045] In this embodiment, the multiple mounting rods 31 are spaced at the same interval, and each mounting rod 31 is connected to multiple air nozzles 32. The air blowing direction of the multiple air nozzles 32 on each mounting rod 31 forms an acute angle with the vertical plane, and the air blowing directions of the multiple air nozzles 32 on each mounting rod 31 are arranged alternately and oppositely.

[0046] Therefore, in this embodiment, the nozzle 32 is positioned at the correct angle during installation, and the blowing angle is adjustable from 30° to 45°.

[0047] To further optimize the above technical solution, the blowing nozzle 32 is a duckbill-type nozzle structure. In this embodiment, a 304 stainless steel duckbill nozzle is selected, with an air outlet width of 15-25mm and a distance of 50-80mm between the air outlet and the oscillating screen body 2.

[0048] See appendix Figure 4 It also includes a negative pressure suction system 5 located at the top of the sealed screen box structure 1, which is used to suction dust from the swing screen body 2.

[0049] To further optimize the above technical solution, the pulse air source system 4 includes an air pump 42, a solenoid valve 43, and a pulse controller 44; the air inlet of the air pump 42 is connected to the external environment; the air inlet of the solenoid valve 43 is connected to the pump outlet of the air pump 42, and the air outlet of the solenoid valve 43 is connected to the blow nozzle 32 through the air supply pipeline 41; the pulse controller 44 is electrically connected to the control terminal of the solenoid valve 43.

[0050] To further optimize the above technical solution, the pulse air source system 4 also includes an air storage tank 45 connected between the air pump 42 and the solenoid valve 43, and a pressure gauge 46 is installed between the air storage tank 45 and the solenoid valve 43.

[0051] To further optimize the above technical solution, the gas supply line 41 includes multiple branch hoses 47, which are connected to multiple air nozzles 32.

[0052] To further optimize the above technical solution, the pulse air source system 4 also includes a power supply 48, which is used to power the air pump 42 and the pulse controller 44.

[0053] In this embodiment, a compressed air source of 0.5-0.8MPa is used, the response time of the solenoid valve 43 is <10ms, and the pulse controller 44 is adjustable at intervals of 10-60s.

[0054] The structure of this embodiment is used to clean the vibrating sieve body for sieving 80-mesh Panax notoginseng powder (12% sugar content):

[0055] The equipment parameters are: blowing pressure 0.6MPa; blowing interval 30s; single blowing duration 0.3s.

[0056] Results: 9.8% clogging rate after 8 hours of continuous operation; screen lifespan of 720 hours; throughput increased to 450 kg / h.

[0057] The overall results of the structure provided in this embodiment are shown in Table 1 below:

[0058] Table 1. Performance Comparison Before and After Structural Improvement

[0059]

[0060]

[0061] As can be seen, this embodiment, through a duckbill-type blowpipe and pulse air source system, generates a high-intensity fan-shaped air curtain (0.5-0.8MPa) at regular intervals during the sieving process, effectively clearing screen blockage caused by sticky powders larger than 80 mesh, reducing the blockage rate to below 15%, increasing throughput by 150%, and doubling screen life. The device has a simple structure, reduces energy consumption by 60%, and through short-frequency, multiple air blows, it neither damages the vibrating screen nor fails to provide effective cleaning. It solves the technical problem of frequent screen blockage when traditional vibrating screens handle sticky fine powders, and is particularly suitable for high-precision sieving operations in industries such as traditional Chinese medicine and food.

[0062] Example 2:

[0063] The only difference between this embodiment and Embodiment 1 is the design of the nozzle assembly 3. In this embodiment:

[0064] See appendix Figure 5 Multiple mounting rods 31 are arranged in pairs, and multiple air nozzles 32 are connected to the two mounting rods 31 in the same group. The multiple air nozzles 32 on the two mounting rods 31 are arranged alternately. The multiple air nozzles 32 on the two mounting rods 31 all form an acute angle with the vertical plane and blow air in opposite directions.

[0065] The two mounting rods 31 in the same group are rotatably connected to the sealed screen box structure 1, and the ends are locked by nuts 33, thereby realizing the angle adjustment of the blowing nozzle 32.

[0066] Therefore, the angle of the nozzle 32 can be adjusted by rotating the mounting rod 31. Since the distance between the two mounting rods 31 in the same group is relatively close, the locking nuts 33 are not located on one side, but are set separately to prevent interference. The other structures in this embodiment are the same as in embodiment 1, and will not be described again here.

[0067] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0068] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A square oscillating screen pulse backflushing anti-clogging device, comprising: A sealed screen box structure (1), wherein a swing screen body (2) is provided inside the sealed screen box structure (1); characterized in that it further includes: The nozzle assembly (3) is located above the gyratory screen body (2). The nozzle assembly (3) includes multiple mounting rods (31) that are connected in parallel between the inner walls of the sealed screen box structure (1). The mounting rods (31) are connected to air nozzles (32), and the air blowing direction of the air nozzles (32) is towards the gyratory screen body (2). A pulse air source system (4) is located outside the sealed screen box structure (1). The air supply pipeline (41) of the pulse air source system (4) is connected to the blow nozzle (32). The blow nozzle (32) is used to clean the swing screen body (2) by short-frequency multiple blows through the control of the pulse air source system (4).

2. The square oscillating screen pulse backflushing anti-clogging device according to claim 1, characterized in that, The multiple mounting rods (31) are spaced at the same interval, and each mounting rod (31) is connected to multiple air nozzles (32). The air blowing direction of the multiple air nozzles (32) on each mounting rod (31) forms an acute angle with the vertical plane, and the air blowing directions of the multiple air nozzles (32) on each mounting rod (31) are arranged alternately and oppositely.

3. The square oscillating screen pulse backflushing anti-clogging device according to claim 1, characterized in that, Multiple mounting rods (31) are arranged in pairs. Multiple air nozzles (32) are connected to the two mounting rods (31) in the same group. The multiple air nozzles (32) on the two mounting rods (31) are arranged alternately. The multiple air nozzles (32) on the two mounting rods (31) form an acute angle with the vertical plane and blow air in opposite directions.

4. The square oscillating screen pulse backflushing anti-clogging device according to claim 3, characterized in that, The two mounting rods (31) of the same group are rotatably connected to the sealed screen box structure (1), and the ends are locked by nuts (33), thereby realizing the angle adjustment of the blowing nozzle (32).

5. A square oscillating screen pulse backflushing anti-clogging device according to any one of claims 1-4, characterized in that, The blow nozzle (32) is a duckbill nozzle structure.

6. The square oscillating screen pulse backflushing anti-clogging device according to claim 1, characterized in that, It also includes a negative pressure suction system (5) located on top of the sealed screen box structure (1), the negative pressure suction system (5) being used to suction dust from the swing screen body (2).

7. The square oscillating screen pulse backflushing anti-clogging device according to claim 1, characterized in that, The pulse air source system (4) includes an air pump (42), a solenoid valve (43), and a pulse controller (44); the air inlet of the air pump (42) is connected to the external environment; the air inlet of the solenoid valve (43) is connected to the pump outlet of the air pump (42), and the air outlet of the solenoid valve (43) is connected to the blow nozzle (32) through the air supply pipeline (41); the pulse controller (44) is electrically connected to the control terminal of the solenoid valve (43).

8. The square oscillating screen pulse backflushing anti-clogging device according to claim 7, characterized in that, The pulse air source system (4) also includes an air storage tank (45) connected between the air pump (42) and the solenoid valve (43), and a pressure gauge (46) is installed between the air storage tank (45) and the solenoid valve (43).

9. A square oscillating screen pulse backflushing anti-clogging device according to claim 7, characterized in that, The air supply line (41) includes multiple branch hoses (47), which are connected to multiple air nozzles (32).

10. A square oscillating screen pulse backflushing anti-clogging device according to claim 7, characterized in that, The pulse air source system (4) also includes a power supply (48) for supplying power to the air pump (42) and the pulse controller (44).

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