Control method for preventing material blockage of alloy gate valve

Abstract

The invention discloses a control method for preventing material blockage of an alloy gate valve, which belongs to the technical field of material conveying and comprises the following steps: S1, optimizing dynamic parameters of a gate, including regulating the length of the gate and controlling the inclination angle; s2, optimizing an opening and closing action process, including stroke subsection control and vibration-assisted material cleaning; s3, the sealing surface is self-cleaned through the periodic maintenance action; the periodic maintenance action comprises the step of executing full-stroke cleaning once after 10 opening and closing cycles are completed every time, material retention in the gate valve can be reduced, blockage caused by particle accumulation is effectively prevented, the accuracy and the sealing performance of the opening and closing action of the gate valve are improved, and meanwhile the shutdown maintenance frequency caused by material blockage is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of material transportation, and particularly relates to a control method for preventing material jamming in an alloy slide valve. Background Art

[0002] In the metallurgical, chemical and building materials industries, slide valves are key components of material transportation systems, and their function is to regulate or cut off the material flow. However, traditional slide valves have many technical defects. For example, the length of the slide valve is insufficient, and materials accumulate and stay inside the valve body. In particular, particulate materials with uneven particle sizes are prone to form an arching effect, resulting in blockages. In addition, there is a gap (usually >1 mm) between the slide plate and the valve body sealing surface, and material residues cause jamming during the opening and closing of the slide plate. Moreover, frequent material jamming requires manual cleaning during downtime, reducing production efficiency and increasing labor and spare part consumption.

[0003] Therefore, there is a need for a control method for preventing material jamming in an alloy slide valve that can reduce the retention of materials inside the slide valve, prevent the formation of blockages caused by particle accumulation, improve the accuracy and sealing performance of the opening and closing actions of the slide plate, and at the same time reduce the frequency of downtime maintenance caused by material jamming. Summary of the Invention

[0004] The purpose of the present invention is to provide a control method for preventing material jamming in an alloy slide valve, which can reduce the retention of materials inside the slide valve, effectively prevent the formation of blockages caused by particle accumulation, improve the accuracy and sealing performance of the opening and closing actions of the slide plate, and at the same time reduce the frequency of downtime maintenance caused by material jamming.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A control method for preventing material jamming in an alloy slide valve, comprising the following steps:

[0007] Step S1: Optimization of dynamic parameters of the slide plate, including adjustment of the slide plate length and control of the tilt angle;

[0008] Step S2: Optimization of the opening and closing action process, including segmented control of the stroke and vibration-assisted material cleaning;

[0009] Step S3: Self-cleaning of the sealing surface through periodic maintenance actions; the periodic maintenance actions include performing a full-stroke cleaning once every 10 opening and closing cycles.

[0010] A further improvement of the technical solution of the present invention lies in: Step S1 includes the following steps:

[0011] Step S101: Adjustment of the slide plate length: First, according to the material characteristics, dynamically adjust the effective working length of the slide plate to 1.2 - 1.3 times the standard length to ensure that the slide plate completely covers the valve body sealing area and eliminates the remaining space;

[0012] Step S102: Tilt Angle Control: During the closing stage of the plugboard, control the plugboard to move at an inclination angle of 5° - 10° to utilize gravity to assist the material to slide down.

[0013] A further improvement of the technical solution of the present invention lies in: In step S101, the calculation formula for the extended amount of the plugboard is as follows:

[0014]

[0015] In the formula, L0 is the original length, d max and d avg are the maximum particle size and the average particle size of the material respectively.

[0016] A further improvement of the technical solution of the present invention lies in: In step S102, the inclination angle of the plugboard is adjusted in real time through a servo motor, and the control method of the inclination angle of the plugboard is as follows:

[0017] θ = arctan(μ -1 ) - 3°

[0018] In the formula, μ is the friction coefficient between the material and the plugboard.

[0019] A further improvement of the technical solution of the present invention lies in: Step S2 includes the following steps:

[0020] Step S201: Stroke Segmentation Control: First, divide the opening and closing process of the plugboard into a fast section and a buffer section. Among them, the speed in the fast section v1 = 20 mm / s, and the speed in the buffer section v2 = 5 mm / s to ensure flexible contact between the plugboard and the valve body. Then, real-time calibration of the position is carried out through a displacement sensor, and the control error ≤ 0.3 mm;

[0021] Step S202: Vibration-assisted Material Cleaning: After the plugboard is closed, start high-frequency micro-vibration for 3 - 5 seconds to shake off the adhering material. Among them, the frequency of the high-frequency micro-vibration is 50 - 100 Hz, and the amplitude ≤ 0.5 mm.

[0022] A further improvement of the technical solution of the present invention lies in: In step S201, the fast section is 0% - 80% of the stroke, and the buffer section is 80% - 100% of the stroke.

[0023] A further improvement of the technical solution of the present invention lies in: In step S202, the vibration energy is automatically adjusted according to the material adhesion strength, and the vibration energy adjustment formula is as follows:

[0024] E = k × ρ × h

[0025] In the formula, k is a coefficient, ρ is the material density, and h is the stacking thickness.

[0026] A further improvement of the technical solution of the present invention lies in: In step S3, the full-stroke cleaning includes the following steps:

[0027] Step S301: After the insertion plate is fully opened, delay for 2 seconds and use the gravity of the material to scour the inside of the valve body;

[0028] Step S302: Pause when the insertion plate is closed to the 90% position, start injecting compressed air to remove the residue on the sealing surface. Among them, the pressure of the compressed air is 0.3 - 0.5 MPa.

[0029] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is:

[0030] The control method for preventing material jamming of the alloy insertion plate valve of the present invention can reduce the retention of materials inside the insertion plate valve, effectively prevent the formation of blockages caused by particle accumulation, improve the accuracy and sealing performance of the opening and closing actions of the insertion plate, and at the same time reduce the frequency of shutdown maintenance caused by material jamming.

[0031] By dynamically adjusting the length and inclination angle of the insertion plate, the present invention effectively reduces the amount of material residue, reduces the number of material jamming times, controls the gap between the insertion plate and the valve body in the buffer section, reduces the leakage rate, the automatic cleaning function reduces the frequency of manual intervention, the annual maintenance cost is reduced, and the dynamic adjustment of parameters can support a variety of materials. Specific Embodiment

[0032] The following further describes the present invention in detail with reference to embodiments:

[0033] The present invention provides a control method for preventing material jamming of an alloy insertion plate valve, including the following steps:

[0034] Step S1: Optimization of the dynamic parameters of the insertion plate, specifically including the following steps:

[0035] Step S101: Adjustment of the insertion plate length: According to the material properties, that is, the particle size, humidity and fluidity of the material, dynamically adjust the effective working length of the insertion plate to 1.2 - 1.3 times the standard length to ensure that the insertion plate completely covers the sealing area of the valve body and eliminates the residual space; among them, the calculation formula for the extension amount of the insertion plate is as follows:

[0036]

[0037] In the formula, L0 is the original length, d max and d avg are the maximum particle size and average particle size of the material respectively;

[0038] Step S102: Control of the inclination angle: During the closing stage of the insertion plate, control the insertion plate to move at an inclination angle of 5° - 10° to assist the material to slide down by gravity; among them, the inclination angle of the insertion plate is adjusted in real time by a servo motor, and the control method of the inclination angle of the insertion plate is as follows:

[0039] θ = arctan(μ -1 ) - 3°

[0040] In the formula, μ is the friction coefficient between the material and the plug board;

[0041] Step S2: Optimize the opening and closing action process, which specifically includes the following steps:

[0042] Step S201: Stroke segmented control: First, divide the opening and closing process of the plug board into a fast segment (0%-80% stroke) and a buffer segment (80%-100% stroke), and adopt different speeds. The speed of the fast segment is v1 = 20 mm / s, and the speed of the buffer segment is v2 = 5 mm / s to ensure flexible contact between the plug board and the valve body. Then, use a displacement sensor to feedback and calibrate the position in real time, and the control error ≤ 0.3 mm;

[0043] Step S202: Vibration-assisted material cleaning: After the plug board is closed, start high-frequency micro-vibration for 3-5 seconds to shake off the attached material. Among them, the frequency of the high-frequency micro-vibration is 50-100 Hz, and the amplitude ≤ 0.5 mm;

[0044] Among them, the vibration energy is automatically adjusted according to the material adhesion strength, and the vibration energy adjustment formula is as follows:

[0045] E = k × ρ × h

[0046] In the formula, k is a coefficient, ρ is the material density, and h is the stacking thickness;

[0047] Step S3: Self-clean the sealing surface through periodic maintenance actions. Among them, the periodic maintenance actions include performing a full-stroke cleaning every 10 opening and closing cycles;

[0048] The full-stroke cleaning includes the following steps:

[0049] Step S301: Delay for 2 seconds after the plug board is fully opened, and use the gravity of the material to wash the inside of the valve body;

[0050] Step S302: Pause when the plug board is closed to 90% position, start compressed air injection to remove the residue on the sealing surface, where the pressure of the compressed air is 0.3-0.5 MPa.

[0051] Example verification:

[0052] Apply this method to the coke powder conveying system in the coking plant, and the parameter settings are: the original length of the plug board L0 = 500 mm, the coke powder d max = 10 mm, calculate the extension of the plug board L = 575 mm; the friction coefficient μ = 0.4, and set the inclination angle θ = 8°

[0053] The material jamming frequency of the alloy plug valve is reduced from 2 times / hour to 0.2 times / hour; the single opening and closing time is shortened from 15 seconds to 12 seconds, and the annual output of coke powder is increased by 1200 tons; the consumption of compressed air only increases by 5%, and the comprehensive energy efficiency ratio is increased by 18%.

[0054] It will be understood that the present invention is described by way of some embodiments, and those skilled in the art will be aware that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. Additionally, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A control method for preventing material jamming of an alloy plug valve, characterized in that It includes the following steps: Step S1: Optimization of the dynamic parameters of the plugboard, including the adjustment of the plugboard length and the control of the inclination angle; Step S2: Optimization of the opening and closing action process, including stroke segmentation control and vibration-assisted material cleaning; Step S3: Self-cleaning the sealing surface through periodic maintenance actions; the periodic maintenance actions include performing a full-stroke cleaning after every 10 opening and closing cycles.

2. The control method for preventing material jamming of an alloy plug valve according to claim 1, characterized in that: The said Step S1 includes the following steps: Step S101: Adjustment of the plugboard length: First, according to the material characteristics, dynamically adjust the effective working length of the plugboard to 1.2 - 1.3 times the standard length to ensure that the plugboard completely covers the valve body sealing area and eliminates the residual space; Step S102: Control of the inclination angle: During the closing stage of the plugboard, control the plugboard to move at an inclination angle of 5° - 10° to utilize the gravity to assist the material to slide down.

3. The control method for preventing material jamming of an alloy plug valve according to claim 2, characterized in that: In Step S101, the calculation formula for the extension amount of the plugboard is as follows: where L0 is the original length, d max and d avg are the maximum particle size and average particle size of the material, respectively.

4. A control method for preventing material jamming of an alloy plug valve according to claim 3, characterized in that: In Step S102, the inclination angle of the plugboard is adjusted in real time by the servo motor, and the control method of the plugboard inclination angle is as follows: θ = arctan(μ -1 ) - 3° In the formula, μ is the friction coefficient between the material and the plugboard.

5. The control method for preventing material jamming of an alloy plug valve according to claim 4, characterized in that: The said Step S2 includes the following steps: Step S201: Stroke segmentation control: First, divide the opening and closing process of the plugboard into a fast section and a buffer section. Among them, the speed in the fast section v1 = 20mm / s, and the speed in the buffer section v2 = 5mm / s to ensure flexible contact between the plugboard and the valve body. Then, feedback through the displacement sensor to calibrate the position in real time, and the control error ≤ 0.3mm; Step S202: Vibration-assisted material cleaning: After the plugboard is closed, start high-frequency micro-vibration for 3 - 5 seconds to shake off the adhering material. Among them, the frequency of the high-frequency micro-vibration is 50 - 100Hz, and the amplitude ≤ 0.5mm.

6. The control method for preventing material jamming of an alloy plug valve according to claim 5, characterized in that: In Step S201, the fast section is 0% - 80% of the stroke, and the buffer section is 80% - 100% of the stroke.

7. A control method for preventing material jamming of an alloy plug valve according to claim 6, characterized in that: In Step S202, the vibration energy is automatically adjusted according to the material adhesion strength, and the vibration energy adjustment formula is as follows: E = k × ρ × h In the formula, k is a coefficient, ρ is the material density, and h is the stacking thickness.

8. A control method for preventing material jamming of an alloy plug valve according to claim 7, characterized in that: In Step S3, the said full-stroke cleaning includes the following steps: Step S301: Delay for 2 seconds after the plugboard is fully opened, and use the gravity of the material to wash the inside of the valve body; Step S302: Pause when the plugboard is closed to 90% of the position, start compressed air injection to remove the residue on the sealing surface, and the pressure of the compressed air is 0.3 - 0.5MPa.

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