Measuring window self-cleaning device for convexity meter

Abstract

The invention discloses a measuring window self-cleaning device for a convexity meter. The measuring window self-cleaning device comprises a driving walking mechanism, a mounting bracket, a self-cleaning mechanism and an automatic control loop, the walking mechanism comprises an idle wheel assembly and a motor box. The self-cleaning mechanism is arranged on the mounting bracket; the automatic control loop is connected with the self-cleaning mechanism; the self-cleaning mechanism comprises a C-shaped frame and a spraying assembly arranged on the C-shaped frame. According to the invention, the cleaning effect is improved, the measurement precision of the convexity gauge is ensured, the manual cleaning frequency is reduced, and the potential safety hazard is eliminated. According to the improved driving walking mechanism, equipment faults and unit shutdown accidents caused by damage of a driving motor, a band-type brake, a frequency converter and the like due to severe environment influences are reduced, the service life of equipment parts is prolonged, the equipment maintenance cost is reduced, and the production efficiency and productivity of a unit are improved.

Description

Technical Field

[0001] The present invention relates to industrial detection instrument technology, and more particularly to a self-cleaning device for a measuring window of a convexity meter. Background Art

[0002] As a key instrument for measuring thickness and flatness in hot-rolled mills, the convexometer directly participates in the AGC control of the rolling mill and plays a crucial role in the quality of strip products. Due to the harsh operating environment at the convexometer site, scale from the strip surface can easily fall onto the convexometer's measuring window during measurement, severely impacting accuracy. Consequently, the cleanliness requirements for the convexometer's measuring window are extremely high. Given the rapid pace of strip production in hot-rolled mills, any issues with the convexometer's measurement accuracy could result in batch quality issues.

[0003] The existing convexity meter's measuring window self-cleaning device mainly uses compressed air for cleaning, so the cleaning effect is poor. In order to ensure the measurement accuracy of the convexity meter, staff must be arranged to flush the measuring window of the convexity meter every day, which is very time-consuming and labor-intensive.

[0004] The existing convexity gauge's C-frame travels on tracks, with the drive motor, frequency converter, and two limit switches (on-line and stop) mounted at the rear of the C-frame, moving with it. Due to the harsh production environment, the C-frame and drive motor, when moved to the on-line position, were exposed to the harsh environment for extended periods. This exposure to high-temperature water mist corrosion and the infiltration of iron oxide powder caused aging and damage to the travel motor's frequency converter and motor. This easily led to unstable and even lost C-frame position signals, causing the convexity gauge to malfunction and cease operation, seriously impacting the normal operation of the unit. Summary of the Invention

[0005] In response to the shortcomings of the prior art, the present invention aims to provide a self-cleaning device for the measuring window of a convexity gauge. This device improves cleaning performance, ensures measurement accuracy, reduces manual cleaning, and eliminates safety hazards. The improved drive mechanism reduces equipment failures and unit downtime caused by damage to the drive motor, brake, inverter, and other components due to harsh environmental conditions, thereby extending the service life of equipment components, reducing equipment maintenance costs, and improving unit production efficiency and capacity.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A self-cleaning device for a measuring window of a convexity meter, comprising a driving mechanism, a mounting bracket, a self-cleaning mechanism and an automatic control circuit;

[0008] The self-cleaning mechanism is provided on the mounting bracket;

[0009] The automatic control circuit is connected to the self-cleaning mechanism;

[0010] The self-cleaning mechanism includes a C-shaped frame and a spray assembly provided on the C-shaped frame;

[0011] The driving travel mechanism is arranged on the C-shaped frame.

[0012] Preferably, the spray assembly includes a spray pipe, a nozzle and an angle adjustment knob;

[0013] The spray pipe is arranged on the C-shaped frame;

[0014] There are multiple nozzles evenly distributed on the spray pipe;

[0015] There are two angle adjustment knobs, which are distributed at the two ends of the spray pipe.

[0016] Preferably, the spray pipe includes a water cavity and an air cavity;

[0017] The water cavity is a round cavity, and the air cavity is a square cavity;

[0018] Half of the circular cavity is embedded in the square tube, and the connection is welded so that the volume ratio between the air cavity and the water cavity is 1.1:1.

[0019] Preferably, the nozzle is a high-pressure fan-shaped spray nozzle.

[0020] Preferably, the C-shaped frame includes an upper arm cross beam, a lower arm cross beam, and a vertical section connected between the upper arm cross beam and the lower arm cross beam;

[0021] An ionization chamber is provided on the upper arm crossbeam;

[0022] An X-ray source is provided on the lower arm crossbeam;

[0023] The vertical section is provided with a measurement conversion box, a PLC module and a high voltage generator in sequence;

[0024] The ionization chamber is connected to the measurement conversion box, and the X-ray source is connected to the high voltage generator.

[0025] Preferably, the water cavity is provided with a water source inlet;

[0026] An air source inlet is provided on the air cavity.

[0027] Preferably, the automatic control circuit includes a limit switch, a water circuit solenoid valve, and a gas circuit solenoid valve;

[0028] The limit switch controls the water circuit solenoid valve and the gas circuit solenoid valve;

[0029] The water circuit solenoid valve is arranged on the pipe of the water source inlet;

[0030] The gas circuit solenoid valve is arranged on the pipeline of the gas source inlet.

[0031] Preferably, the measuring window self-cleaning device further includes a control unit;

[0032] The control unit includes a main power cabinet, a main PLC arranged in the main power cabinet, and a rolling mill PLC that establishes a communication connection with the main PLC.

[0033] Preferably, the travel mechanism includes an idler assembly and a motor box;

[0034] The idler assembly is arranged at the front end of the track, and the motor box is arranged on the C-shaped frame;

[0035] The motor box is provided with a driving motor, a steering gear and an encoder;

[0036] The output side of the drive motor is connected to the steering gear, and the lower end of the steering gear is connected to the idler wheel assembly through a chain;

[0037] The upper end of the diverter is connected to the encoder through a belt.

[0038] The present invention provides a self-cleaning device for the measuring window of a convexity gauge. When the C-frame reaches the measuring position, a limit switch is energized, causing the solenoid valve to open the air and water valves. When the C-frame leaves the measuring position, the limit switch is de-energized, causing the solenoid valve to close, thus achieving automatic control of the C-frame's forward and backward cleaning mechanism. This device also effectively reduces the accumulation of iron oxide powder and iron oxide scale on the measuring window, improving measurement accuracy, reducing the number of manual cleaning operations, and increasing labor efficiency. The convexity gauge automatically shuts down after retraction, effectively eliminating safety hazards and enhancing the inherent safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the measuring window self-cleaning device of the present invention;

[0040] Figure 2 It is a structural schematic diagram of the self-cleaning mechanism in the measuring window self-cleaning device of the present invention;

[0041] Figure 3 It is a schematic diagram of the automatic control circuit in the measuring window self-cleaning device of the present invention;

[0042] Figure 4 It is a schematic structural diagram of the C-shaped frame and the control unit in the measuring window self-cleaning device of the present invention;

[0043] Figure 5 It is a structural schematic diagram of the motor box in the measuring window self-cleaning device of the present invention. DETAILED DESCRIPTION

[0044] In order to better understand the above technical solutions of the present invention, the technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

[0045] Combine Figure 1 and Figure 2 As shown, the present invention provides a self-cleaning device for a measuring window of a convexity meter, which includes a driving mechanism, a mounting bracket 1, a self-cleaning mechanism and an automatic control circuit.

[0046] The self-cleaning mechanism is installed on the mounting bracket 1 .

[0047] The automatic control loop is connected to the self-cleaning mechanism to control the operation of the self-cleaning mechanism.

[0048] The self-cleaning mechanism includes a C-shaped frame 2 and a spray assembly installed on the C-shaped frame 2.

[0049] The spray assembly includes a spray pipe 3, a nozzle 4 and an angle adjustment knob 5.

[0050] The spray pipe 3 is installed on the C-shaped frame 2, close to the measurement window.

[0051] There are multiple nozzles 4, which are high-pressure fan-shaped spray nozzles, evenly distributed on the spray pipe 4 to form a uniform high-impact fan-shaped spray. They are installed on the spray pipe 4 at an angle of 120° and can cover the entire measurement window.

[0052] There are two angle adjustment knobs 5, which are distributed at both ends of the spray pipe 3, and are used to adjust the angle of the spray assembly. The adjustable angle is 60°.

[0053] The spray pipe 3 includes a water cavity 6 and an air cavity 7 .

[0054] The water cavity 6 is a circular cavity, and the air cavity 7 is a square cavity.

[0055] Half of the circular cavity is embedded in the square tube, and the joints are evenly welded so that the volume ratio between the air cavity 7 and the water cavity 6 is 1.1:1.

[0056] The water cavity 6 is provided with a water source inlet 8 , and the air cavity 7 is provided with an air source inlet 9 .

[0057] Combine Figure 3 As shown, the automatic control circuit includes a limit switch 10, a water circuit solenoid valve 11, and a gas circuit solenoid valve 12.

[0058] The limit switch 10 controls the water circuit solenoid valve 11 and the gas circuit solenoid valve 12 .

[0059] The water channel solenoid valve 11 is installed on the pipeline of the water source inlet 8.

[0060] The gas circuit solenoid valve 12 is installed on the pipeline of the gas source inlet 9.

[0061] When the C-frame 2 moves to the measuring position, the limit switch 10 is energized, the water circuit solenoid valve 11 and the air circuit solenoid valve 12 open, and the measuring window begins to be cleaned. When the C-frame 2 returns to the maintenance room, the limit switch 10 is de-energized, the water circuit solenoid valve 11 and the air circuit solenoid valve 12 close, and the water and gas spraying stops.

[0062] Combine Figure 4 As shown, the C-shaped tube 2 includes an upper arm cross beam 13 , a lower arm cross beam 14 and a vertical section 15 connected between the upper arm cross beam 13 and the lower arm cross beam 14 .

[0063] Dozens or even hundreds of ionization chambers 16 are mounted on the upper arm crossbeam 13 .

[0064] Two to three X-ray sources 17 are mounted on the lower arm crossbeam 14 .

[0065] A measurement conversion box 18 , a PLC module 19 and a high-voltage generator 20 are sequentially arranged on the vertical section 15 .

[0066] The ionization chamber 16 is connected to a measurement conversion box 18 , and the X-ray source 17 is connected to a high voltage generator 20 .

[0067] The measuring window of the convexity meter is made of titanium alloy metal film. If the iron oxide scale is not cleaned in time and accumulates and adheres to its surface for a long time, it will cause the cross-section of the measuring screen to be concave, causing the measuring voltage to fluctuate and resulting in measurement errors.

[0068] The measuring window self-cleaning device further comprises a control unit;

[0069] The control unit includes a main electric cabinet 21 , a main PLC 22 installed in the main electric cabinet 21 , and a rolling mill PLC 23 communicating with the main PLC 22 .

[0070] Combine Figure 4 and Figure 5 As shown, a driving travel mechanism is provided on the C-frame 2.

[0071] The traveling mechanism includes an idler assembly and a motor box 24;

[0072] The idler wheel assembly is mounted on the front end of the track, and the motor box 24 is mounted on the C-frame 2 .

[0073] A driving motor 25 , a steering gear 26 and an encoder 27 are installed in the motor box 24 .

[0074] The output side of the driving motor 25 is connected to the steering gear 26 , and the lower end of the steering gear 26 is connected to the idler wheel assembly through a chain.

[0075] The upper end of the diverter 26 is connected to the encoder 27 via a belt 28 .

[0076] The driving motor 25 drives the active sprocket to rotate through the lower side of the steering gear 26, and the gear drags the C-frame 2 forward and backward on the track through the chain, and drives the encoder 27 for position positioning through the gear and belt on the upper side of the converter 26.

[0077] The idler pulley assembly is mainly used to guide the chain. It is fixed at the front end of the track and serves as a support point for the chain.

[0078] Example

[0079] In the measuring window self-cleaning device of this embodiment, the lower arm crossbeam 14 of the C-frame 2 is equipped with 2-3 X-ray sources 17, the upper arm crossbeam 13 is equipped with dozens or even hundreds of ionization chambers 16, and the vertical section 15 is equipped with a measurement conversion box 18, a PLC module 19, a high-voltage generator 20, etc.

[0080] The spray pipe 3 is made of 316 stainless steel. The volume ratio of the air cavity 7 to the water cavity 6 is 1.1:1. Angle adjustment knobs 5 are located at each end of the spray pipe 3 for adjustment through 60°. The spray pipe 3 is equipped with several spaced nozzles 4, which utilize a high-pressure fan-shaped spray pattern and are made of 316 stainless steel.

[0081] The measuring window self-cleaning device in this embodiment uses compressed air as the air source, with a compressed air pressure of 0.6 MPa, and circulating water as the water source, with a circulating water pressure of 0.6 MPa. Nozzle 4 is angled at 120°, and the water jet covers the entire measuring window. The installation position does not block the measuring window.

[0082] The volume ratio of the air cavity 7 to the water cavity 6 in the spray pipe 3 cavity is mainly composed of square tubes and round tubes. The volume of the square tube is the volume of the air cavity V 气(方管) , the volume of the circular tube is the water cavity V 水(圆管) , that is, the calculation formula:

[0083]

[0084] The specific operating process of the measuring window self-cleaning device in this embodiment is as follows: The spray pipe 3 is installed at the edge of the measuring window on the lower arm crossbar of the convexity gauge. The spray pipe 3 is divided into a water chamber 6 and an air chamber 7. The water chamber 6 is a circular tube, and the air chamber 7 is a square tube. The circular tube is half embedded in the square tube, and the joint is welded evenly, resulting in an air chamber to water chamber volume ratio of 1.1:1. The nozzle 4 is a high-pressure fan-shaped spray nozzle. Multiple nozzles 4 are installed on the spray pipe 3 to produce a uniform, high-impact fan-shaped spray. The nozzle 4 has an air inlet diameter of 5mm, a water hole diameter of 6mm, and a thread size of 3 / 8. The nozzle 4 is angled 120 degrees, with one nozzle 4 installed every 42.73mm. A total of 32 nozzles 4 are required to cover the entire measuring window. When the C-frame 2 reaches the measuring position, the limit switch 10 is energized, and the solenoid valve opens the air and water valves. When leaving the measuring position, the limit switch 10 is de-energized, and the solenoid valve closes the valve. This achieves automatic control of the C-frame 2 forward and backward cleaning device.

[0085] The self-cleaning device for the measuring window in this embodiment effectively removes iron oxide powder from the convexity gauge window, essentially eliminating the need for the 40-minute daily roller change and window flushing. It also effectively eliminates the safety hazard caused by the spray device remaining open after the equipment is returned to the booth, eliminating water mist spraying within the booth and enhancing the inherent safety of the equipment.

[0086] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A self-cleaning device for a measuring window of a convexity meter, characterized in that: It includes driving mechanism, mounting bracket, self-cleaning mechanism and automatic control circuit; The self-cleaning mechanism is provided on the mounting bracket; The automatic control circuit is connected to the self-cleaning mechanism; The self-cleaning mechanism includes a C-shaped frame and a spray assembly provided on the C-shaped frame; The driving travel mechanism is arranged on the C-shaped frame.

2. The measuring window self-cleaning device for a convexity meter according to claim 1, characterized in that: The spray assembly includes a spray pipe, a nozzle and an angle adjustment knob; The spray pipe is arranged on the C-shaped frame; There are multiple nozzles evenly distributed on the spray pipe; There are two angle adjustment knobs, which are distributed at the two ends of the spray pipe.

3. The measuring window self-cleaning device for a convexity meter according to claim 2, characterized in that: The spray pipe includes a water cavity and an air cavity; The water cavity is a round cavity, and the air cavity is a square cavity; Half of the circular cavity is embedded in the square tube, and the connection is welded so that the volume ratio between the air cavity and the water cavity is 1.1:

1.

4. The measuring window self-cleaning device for a convexity meter according to claim 2, characterized in that: The nozzle is a high-pressure fan-shaped spray nozzle.

5. The measuring window self-cleaning device for a convexity meter according to claim 2, characterized in that: The C-shaped frame includes an upper arm cross beam, a lower arm cross beam, and a vertical section connected between the upper arm cross beam and the lower arm cross beam; An ionization chamber is provided on the upper arm crossbeam; An X-ray source is provided on the lower arm crossbeam; The vertical section is provided with a measurement conversion box, a PLC module and a high voltage generator in sequence; The ionization chamber is connected to the measurement conversion box, and the X-ray source is connected to the high voltage generator.

6. The measuring window self-cleaning device for a convexity meter according to claim 3, characterized in that: The water cavity is provided with a water source inlet; An air source inlet is provided on the air cavity.

7. The measuring window self-cleaning device for a convexity meter according to claim 6, characterized in that: The automatic control circuit includes a limit switch, a water circuit solenoid valve, and a gas circuit solenoid valve; The limit switch controls the water circuit solenoid valve and the gas circuit solenoid valve; The water circuit solenoid valve is arranged on the pipe of the water source inlet; The gas circuit solenoid valve is arranged on the pipeline of the gas source inlet.

8. The measuring window self-cleaning device for a convexity meter according to claim 2, characterized in that: The measuring window self-cleaning device further includes a control unit; The control unit includes a main power cabinet, a main PLC arranged in the main power cabinet, and a rolling mill PLC that establishes a communication connection with the main PLC.

9. The measuring window self-cleaning device for a convexity meter according to claim 7, characterized in that: The traveling mechanism includes an idler assembly and a motor box; The idler assembly is arranged at the front end of the track, and the motor box is arranged on the C-shaped frame; The motor box is provided with a driving motor, a steering gear and an encoder; The output side of the driving motor is connected to the steering gear, and the lower end of the steering gear is connected to the idler wheel assembly through a chain; The upper end of the diverter is connected to the encoder through a belt.

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