A kind of anti-blocking device for seed cotton cleaning machine dust cage negative pressure pipeline

Abstract

The utility model relates to seed cotton cleaning technical field discloses a kind of dust cage negative pressure pipeline's anti-blocking device for seed cotton cleaning machine to solve the problem that dust cage negative pressure pipeline impurity accumulation causes dust cage adsorption capacity to reduce in prior art, including negative pressure fan, air inlet pipe and expansion section, at least one group is provided along air inlet pipe length direction, expansion section is coaxially distributed with air inlet pipe and is internally communicated, inner diameter is greater than the inner diameter of air inlet pipe;Filtering assembly is set in the inside of expansion section, for intercepting lightweight impurities in airflow;Dust collection component, including dust collection box connected below expansion section, dust collection box upper end feed inlet and expansion section between are provided with wind valve, filtering assembly is located behind dust collection component in airflow direction;Vibration component, for vibrating cleaning filtering assembly. The device reduces airflow velocity by expansion section to make impurity to settle, filtering assembly intercepts lightweight impurities, and vibration component automatically cleans filtering assembly, can effectively prevent pipeline blockage.

Description

Technical Field

[0001] This utility model relates to the field of seed cotton cleaning technology, specifically to an anti-clogging device for the negative pressure pipe of the dust cage of a seed cotton cleaning machine. Background Technology

[0002] When the dust cage of the cotton seed cleaning machine is working, a small amount of foreign fibers, leaf debris, soil particles and other impurities can easily pass through the dust cage filter components and enter the negative pressure pipe. Under long-term working conditions, impurities can easily accumulate in the negative pressure pipe, which will reduce the inner diameter of the negative pressure pipe and thus reduce the negative pressure. This will affect the dust cage's adsorption effect on foreign fibers in the cleaning machine. Moreover, a small amount of lightweight foreign fibers can easily enter the negative pressure fan through the negative pressure pipe, thereby damaging the negative pressure fan. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, this utility model provides an anti-clogging device for the negative pressure pipe of the dust cage of a cotton cleaning machine, so as to solve the problem that the accumulation of impurities in the negative pressure pipe of the cotton foreign fiber cleaning machine causes the dust cage adsorption effect to deteriorate.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model provides an anti-clogging device for the negative pressure pipe of the dust cage in a cotton seed cleaning machine, including a negative pressure fan, an air inlet pipe connected between the negative pressure fan and the dust cage, and:

[0006] At least one set of expansion sections is provided along the length of the air inlet pipe. The expansion sections are coaxially distributed with the air inlet pipe and are internally connected. Their inner diameter is larger than that of the air inlet pipe.

[0007] A filter assembly, disposed inside the expansion section, is used to intercept light impurities in the airflow;

[0008] The dust collection assembly includes a dust collection box connected below the expansion section, used to collect impurities settled in the expansion section and intercepted by the filter assembly. An air vent valve is provided between the upper inlet of the dust collection box and the expansion section, and the filter assembly is located behind the dust collection assembly in the airflow direction.

[0009] The vibration assembly, connected to the filter assembly, is used to clean the filter assembly by vibration.

[0010] Furthermore, it also includes a controller and a negative pressure detection component. The signal input and output terminals of the controller are respectively connected to the negative pressure detection component and the vibration component. The negative pressure detection component is used to detect the pressure difference between the front and rear sides of the expansion section, and sends a first control signal to the controller to control the vibration component to operate when the pressure difference reaches a first preset threshold.

[0011] Furthermore, the negative pressure detection component includes pressure sensors located on the air inlet pipes on both sides before and after the expansion section, and both sets of pressure sensors are connected to the signal input terminal of the controller.

[0012] Furthermore, the pressure sensor is located on the upper end of the inner wall of the air inlet duct.

[0013] Furthermore, the dust collection box is provided with a discharge port at its lower end, and the discharge port is equipped with an electromagnetic switch valve.

[0014] Furthermore, a level gauge is installed inside the dust collection box, which sends a second control signal to the controller to open the electromagnetic switch valve when the material in the dust collection box reaches the preset maximum material height.

[0015] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0016] 1. This device reduces the airflow speed by setting an expansion section, causing impurities to settle naturally under gravity when passing through the expansion section. In addition, the filter components can further intercept light impurities in the airflow. The two work together to effectively prevent pipe blockage and ensure stable negative pressure in the dust cage.

[0017] 2. The vibration component can periodically or as needed clean the filter component through vibration to prevent clogging and maintain the filtration effect;

[0018] 3. By monitoring the pressure difference changes on both sides of the expansion section in real time through the negative pressure detection component, the blockage of the filter component can be detected in time. The vibration component is controlled by the controller to clean the filter component through vibration. The above operations can be completed automatically without manual intervention, which effectively improves work efficiency.

[0019] 4. The dust collection component, combined with the windproof valve design, can effectively collect settled and filtered impurities, and prevent airflow short circuits, ensuring the normal operation of the negative pressure system.

[0020] 5. By setting a level gauge, the material level in the dust collection box can be automatically detected, and the electromagnetic switch valve can be opened and closed by the controller to realize the automatic discharge of material in the dust collection box, avoiding the risk of the air inlet pipe bending due to the accumulation of impurities in the dust collection box. Attached Figure Description

[0021] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the control system in the second embodiment of the present invention;

[0024] Among them: 1-negative pressure fan, 2-air inlet pipe, 3-expanding section, 4-dust collection box, 5-windproof valve, 6-filter screen, 7-vibration motor, 8-pressure sensor, 9-electromagnetic switch valve, 10-level gauge, 11-controller. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] First Embodiment

[0027] like Figure 1 As shown, this utility model provides an anti-clogging device for the negative pressure pipe of the dust cage of a cotton cleaning machine, including a negative pressure fan 1 and an air inlet pipe 2. The length of the air inlet pipe 2 is distributed in the horizontal direction, and its two ends are respectively connected to the dust cage of the cotton cleaning machine and the negative pressure fan 1, so that the dust cage is generated by the negative pressure fan 1. The air inlet pipe 2 is provided with at least one set of expansion sections 3 along its length direction. A filter component is provided inside the expansion section 3. The filter component is connected to a vibration component. A dust collection component is provided below the expansion section 3.

[0028] Specifically, there are two sets of expansion sections 3. The expansion sections 3 are coaxially distributed with the air inlet pipe 2. The inner diameter of the expansion section 3 is twice that of the inner diameter of the air inlet pipe 2. At least one end near the dust cage adopts a gradual structure with the inner diameter increasing from small to large in order to ensure a smooth airflow transition and reduce eddy loss.

[0029] The filter assembly includes a filter screen 6, which is made of stainless steel wire mesh with a mesh diameter slightly smaller than that of lightweight foreign fibers and leaf debris. The filter screen 6 is circular and is fixed to the rear section of the inner wall of the expansion section 3 by a support frame. The filter assembly can intercept lightweight impurities in the airflow, such as lightweight foreign fibers and leaf debris, to prevent them from accumulating inside the air inlet duct 2 or entering the negative pressure fan 1 and affecting the normal operation of the negative pressure fan 1.

[0030] The vibration assembly includes a vibration motor 7, which is fixedly connected to the support frame of the filter screen 6. The vibration motor 7 can drive the filter screen 6 to perform mechanical vibration to shake off impurities attached to the filter screen 6.

[0031] The dust collection assembly includes a dust collection box 4 connected below the expansion section 3. The upper end of the dust collection box 4 is provided with a feed inlet, which is connected to the lower end of the expansion section 3 through a flange. An air dam 5, i.e., a shut-off valve, is provided at the feed inlet. The air dam 5 is connected to a drive motor, which is used to drive the air dam to rotate at a constant speed. The drive motor is not shown in the attached drawings. It should also be noted that, in the direction of airflow, the dust collection assembly is located in front of the filter assembly.

[0032] By incorporating an expansion section 3, this device allows heavier impurities such as sand particles in the airflow to settle due to reduced kinetic energy caused by the decreased flow velocity. These particles then fall into the dust collection box 4 under gravity. Lighter impurities, such as lightweight foreign fibers and leaf debris, are filtered through the filter screen 6 and fall into the dust collection box 4. This prevents impurities from accumulating in the air inlet pipe 2 and prevents light impurities from entering the negative pressure fan 1 and causing damage. Furthermore, the vibrating motor 7 drives the filter screen 6 to vibrate, preventing the filter screen 6 from becoming clogged and reducing the dust cage's adsorption capacity, which would affect the normal operation of the cotton cleaning machine.

[0033] Second Embodiment

[0034] This embodiment adds a control system based on the first embodiment.

[0035] like Figures 1-2 As shown, the control system includes a controller 11 and a negative pressure detection component. Each expansion section 3 corresponds to a negative pressure detection component. The controller 11 is a programmable logic controller (PLC) with analog input / output modules, digital input / output modules, and a storage module. The negative pressure detection component includes two sets of pressure sensors 8 located inside the air inlet duct 2 and on both sides of the expansion section 3. Both sets of pressure sensors 8 are connected to the signal input terminal of the controller 11, and the vibration motor 7 is connected to the signal output terminal of the controller 11. The storage module of the controller 11 has a preset first threshold value. The controller 11 can detect the pressure difference between the front and back sides of the expansion section 3 by receiving the signals from the two sets of pressure sensors 8. When the pressure difference measured by the two sets of pressure sensors 8 is greater than or equal to the first preset threshold value, it can be determined that the filter screen 6 inside the expansion section 3 is blocked. At this time, the controller 11 sends a first control signal to control the vibration motor 7 to operate for a certain period of time, thereby vibrating and cleaning the filter screen 6. Of course, if the pressure difference still does not drop to the normal range after vibration cleaning, the vibration time or frequency can be increased by the controller 11.

[0036] When more impurities accumulate on the filter screen 6, it increases airflow resistance, causing the pressure difference before and after the expansion section 3 to increase. The pressure sensor 8 detects this change and feeds it back to the controller 11, which then starts the vibration motor 7. The vibration then shakes the impurities on the filter screen 6 into the dust collection box 4, preventing the filter screen 6 from becoming clogged and causing abnormal negative pressure in the dust cage.

[0037] It should be noted that in this embodiment, the pressure sensor 8 is located at the upper end of the inner wall of the air inlet pipe 2. There are fewer impurities accumulating and adhering at the upper end of the inner wall of the air inlet pipe 2, which can reduce the influence of impurities on the detection results of the pressure sensor 8 and improve the accuracy of the measurement. The motor of the negative pressure fan 1 is connected to the signal output terminal of the controller 11, which can control the opening and closing of the negative pressure fan 1.

[0038] In addition, in this embodiment, a level gauge 10 is also provided inside the dust collection box 4, and a discharge port is provided at the lower end. An electromagnetic switch valve 9 is provided at the discharge port. The level gauge 10 is a capacitive level switch used to detect the material level inside the dust collection box 4. The level gauge 10 and the electromagnetic switch valve 9 are respectively connected to the signal input terminal and signal output terminal of the controller 11. The storage module of the controller 11 also presets the maximum material height and the minimum material height. When the material height detected by the level gauge 10 is greater than or equal to the preset maximum material height, the controller 11 sends a second control signal to control the electromagnetic switch valve 9 to open for material discharge. When the material height measured by the level gauge is less than or equal to the preset minimum material height, the controller 11 sends a third control signal to close the electromagnetic valve 9. By setting the level gauge 10 and the electromagnetic switch valve 9, the automatic discharge of impurities inside the dust collection box 4 can be realized.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A clog prevention device for the negative pressure pipe of a cotton seed cleaning machine dust cage, comprising a negative pressure fan and an air inlet pipe connected between the negative pressure fan and the dust cage, characterized in that, Also includes: At least one set of expansion sections is provided along the length of the air inlet pipe. The expansion sections are coaxially distributed with the air inlet pipe and are internally connected. Their inner diameter is larger than that of the air inlet pipe. A filter assembly, disposed inside the expansion section, is used to intercept light impurities in the airflow; The dust collection assembly includes a dust collection box connected below the expansion section, used to collect impurities settled in the expansion section and intercepted by the filter assembly. An air vent valve is provided between the upper inlet of the dust collection box and the expansion section, and the filter assembly is located behind the dust collection assembly in the airflow direction. The vibration assembly, connected to the filter assembly, is used to clean the filter assembly by vibration.

2. The anti-clogging device for the negative pressure pipeline of the dust cage of a cotton seed cleaning machine according to claim 1, characterized in that, It also includes a controller and a negative pressure detection component. The signal input and output terminals of the controller are connected to the negative pressure detection component and the vibration component, respectively. The negative pressure detection component is used to detect the pressure difference between the front and rear sides of the expansion section, and sends a first control signal to the controller to control the vibration component to operate when the pressure difference reaches a first preset threshold.

3. The anti-clogging device for the negative pressure pipeline of the dust cage of a cotton seed cleaning machine according to claim 2, characterized in that, The negative pressure detection component includes pressure sensors located on the air inlet pipes on both sides before and after the expansion section, and both sets of pressure sensors are connected to the signal input terminal of the controller.

4. The anti-clogging device for the negative pressure pipeline of the dust cage of a cotton seed cleaning machine according to claim 3, characterized in that, The pressure sensor is located on the upper part of the inner wall of the air inlet pipe.

5. The anti-clogging device for the negative pressure pipeline of the dust cage of a cotton seed cleaning machine according to claim 2, characterized in that, The dust collection box is provided with a discharge port at the lower end, and the discharge port is equipped with an electromagnetic switch valve.

6. The anti-clogging device for the negative pressure pipeline of the dust cage of a cotton seed cleaning machine according to claim 5, characterized in that, The dust collection box is equipped with a level gauge, which sends a second control signal to the controller to open the electromagnetic switch valve when the material in the dust collection box reaches the preset maximum material height.

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