Anti-pollution barrel cover group for electrode paste heating measurement

Abstract

The invention discloses an anti-pollution cylinder cover group for electrode paste heating measurement, and relates to the technical field of calcium carbide furnace smelting equipment, the anti-pollution cylinder cover group comprises three same cylinder covers, the cylinder covers are matched with electrode cylinders, and a material height measurement module, a CO monitoring module, a gas pumping and exhausting module and a purified gas purging module are integrated on each cylinder cover; the material height measuring module comprises a transverse motor, a transverse lead screw, a transverse sliding block, a longitudinal motor, a longitudinal lead screw, a longitudinal sliding block and a laser range finder. By installing the material height measurement module, the function of accurately measuring the material height is achieved, the measurement mode is converted into dynamic two-dimensional scanning measurement from static single-point measurement, the influence of a single abnormal point is eliminated, the representativeness and accuracy of material height data are remarkably improved, and data integration is provided for accurately controlling feeding.

Description

Technical Field

[0001] This invention relates to the field of calcium carbide furnace smelting equipment technology, specifically to a contamination-proof cylinder cover assembly for electrode paste heating and measurement. Background Technology

[0002] During the calcium carbide production process, the electrode paste undergoes a phase change process from solidification at the top to graphitization at the bottom inside the electrode cylinder. This process requires precise measurement of the height of the electrode paste inside the cylinder to achieve accurate feeding. When the electrode paste is heated, it will produce a large amount of carbon monoxide gas and smoke. CO gas is toxic and poses a significant safety hazard. The smoke produced will pollute and obscure the optical measuring instruments installed on the cylinder cover, leading to inaccurate measurements or even equipment failure.

[0003] Currently, existing electrode cylinder covers have a single function, usually only serving a simple covering purpose. Functions such as measurement, exhaust, and gas monitoring are often performed by independent devices, resulting in low system integration. This makes it impossible to effectively monitor and quickly exhaust CO gas generated inside the cylinder in real time, posing significant safety hazards. The mirrors of optical measurement equipment are easily contaminated by smoke, leading to data drift or complete failure. Frequent production interruptions are required for manual cleaning and maintenance, which seriously affects the production efficiency and quality of calcium carbide.

[0004] Patent document CN117717874B discloses a flue gas purification device in the electrode paste production process. The above patent ensures that all activated carbon in the flue gas purification ring can uniformly adsorb polluting flue gas, thereby ensuring the consistency of the activated carbon adsorption function. This not only ensures the overall adsorption effect of the flue gas purification ring, but also ensures the utilization rate of activated carbon.

[0005] The aforementioned patent improves the adsorption effect of activated carbon on polluted flue gas by setting a flue gas purification ring on the sealing cover, thereby increasing the friction between polluted flue gas and activated carbon and enhancing the purification effect of the flue gas purification ring. However, the integration level of the cover is low and its function is relatively simple.

[0006] Therefore, this application proposes a pollution-proof cap assembly for electrode paste heating measurement that integrates sealing, safety monitoring, gas purification and precise measurement functions. Summary of the Invention

[0007] The purpose of this invention is to provide a contamination-proof cap assembly for electrode paste heating and measurement, so as to solve the technical problem of low integration mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a pollution-proof cylinder cover assembly for electrode paste heating and measurement, comprising three identical cylinder covers, wherein the cylinder covers are adapted to the electrode cylinder and each cylinder cover integrates a material height measurement module, a CO monitoring module, a gas extraction module and a purified gas purging module, wherein the material height measurement module comprises: a transverse motor, a transverse lead screw, a transverse slider, a longitudinal motor, a longitudinal lead screw, a longitudinal slider and a laser rangefinder;

[0009] The transverse motor is fixedly mounted on the upper surface of the cylinder cover. The transverse lead screw is connected to the output end of the transverse motor. A fixing block is fixedly mounted on the cylinder cover at the end of the transverse lead screw away from the transverse motor. The transverse slider is sleeved on the transverse lead screw. The longitudinal motor is located inside the transverse slider. The output end of the longitudinal motor extends outward in a vertical direction away from the transverse lead screw and is connected to the longitudinal lead screw. The longitudinal slider is sleeved on the longitudinal lead screw. The laser rangefinder is embedded at the bottom of the longitudinal slider.

[0010] Preferably, in the material height measuring module, the end of the longitudinal lead screw away from the longitudinal motor is connected to a roller via a bearing, and a groove for placing the roller is provided on the surface of the cylinder cover below the roller. A measuring window is provided on the surface of the cylinder cover below the material height measuring module. The measuring window is rectangular and located at the center of the cylinder cover. The measuring window penetrates the cylinder cover and the inner wall surface of the measuring window is smoothed. A transparent viewing window is embedded in the lower part of the measuring window.

[0011] Preferably, the CO monitoring module is a CO concentration sensor. A sensor through hole is provided on the cylinder cover. The sensing head of the CO concentration sensor is fixedly embedded in the sensor through hole of the cylinder cover as the detection end. The sensing surface of the sensing head is flush with the lower surface of the cylinder cover. A short round tube is provided extending downward from the lower surface of the cylinder cover to wrap the CO sensor sensing head. An air inlet is provided on the side wall of the round tube near the bottom.

[0012] Preferably, the gas extraction module is also fixedly installed on the upper surface of the cylinder cover. The gas extraction module consists of an exhaust port, a flow guide, and an exhaust fan. The exhaust port is opened on the cylinder cover, and the frustum-shaped flow guide covers the exhaust port and is fixedly installed on the upper surface of the cylinder cover. The small end opening of the flow guide is sealed to the air inlet of the exhaust fan through a flange. The air outlet of the exhaust fan is connected to an external exhaust pipe. The large end opening of the flow guide is tightly fixed to the cylinder cover with bolts and completely covers the exhaust port. The internal cavity of the flow guide is connected to the internal cavity of the electrode cylinder through the exhaust port to form an intake port. The internal flow channels of the exhaust port and the flow guide are both smoothed.

[0013] Preferably, the purified gas purging module includes an annular purging pipe and an air supply pipe. The annular purging pipe is embedded on the lower surface of the cylinder cover, and the central axis of the purging pipe coincides with the detection optical path axis of the laser rangefinder. A series of micro-inclined purging holes are uniformly drilled along the circumference on the inner wall of the purging pipe. The axes of all the inclined purging holes form an acute angle with the radial direction and point to the lower part of the central axis of the purging pipe. The air supply pipe is connected to the purging pipe. The end of the air supply pipe away from the purging pipe passes through the cylinder cover and is connected to an external purified gas source. The external purified gas source is connected to the inner cavity of the purging pipe through the air supply pipe to form a purging outlet.

[0014] Preferably, an annular sealing groove is provided at the bottom edge of the cylinder cover near the position where it mates with the electrode cylinder. A sealing ring is pressed into the sealing groove with an interference fit. The sealing ring is made of high-temperature resistant silicone rubber. Cable through holes are provided on the upper surface of the cylinder cover. All through holes on the cylinder cover are sealed.

[0015] Preferably, the cylinder cover is mounted on a drive bracket structure, which includes a support column and a connecting arm. Both the support column and the connecting arm are I-shaped. The support column is vertically mounted on a rotating base. A rotary motor is mounted on the surface of the rotating base and attached to the support column. The bottom of the rotating base is connected to a motor cylinder. A first motor is mounted inside the motor cylinder. A first lead screw is vertically mounted inside the support column. The lower end of the first lead screw passes through the center of the rotating base and extends downward to connect with the output end of the first motor. A first slider is sleeved on the first lead screw. A slide rail adapted to the first slider is vertically mounted on the side wall of the support column, and limit blocks are respectively mounted at both ends of the slide rail. The side of the first slider is fixedly connected to the horizontally mounted connecting arm.

[0016] Preferably, a second lead screw is horizontally arranged inside the connecting arm of the drive bracket structure, a second motor is arranged inside the first slider, one end of the second lead screw near the support column passes through the first slider and is connected to the output end of the second motor, two second sliders are sleeved on the second lead screw, and a connector is fixedly installed at the bottom of each of the two second sliders. The end of the connector away from the second slider is hinged to the upper surface of the cylinder cover near the edge, and a torsion spring that provides adaptive clamping force is also provided at the hinge of the connector and the cylinder cover.

[0017] Preferably, the first slider, the second slider, the transverse slider, and the longitudinal slider are each drilled with threads that are compatible with the first lead screw, the second lead screw, the transverse lead screw, and the longitudinal lead screw, respectively.

[0018] Preferably, there are three cylinder covers, all of which have the same structure and are respectively mounted on three drive bracket structures. The three cylinder covers are distributed around a center point at 120-degree angles to form a cylinder cover assembly. A central control module is provided at the center point. The central control module is connected to the rotary motor, the first motor, the second motor, the material height measurement module, the CO monitoring module, the gas extraction module, and the purified gas purging module through signal lines built into the drive bracket structure.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention achieves precise measurement of material height by installing a material height measurement module. The measurement mode is changed from static single-point measurement to dynamic two-dimensional scanning measurement, eliminating the influence of a single abnormal point and significantly improving the representativeness and accuracy of material height data, providing data integration for precise control of feeding;

[0021] 2. By integrating a CO monitoring module and a gas extraction module, this invention achieves enhanced safety by monitoring the CO gas concentration in real time and actively extracting it, enabling timely detection and removal of toxic gases, and significantly improving the inherent safety level of the production site.

[0022] 3. This invention achieves active pollution prevention by installing a purified air purging module, forming a local air curtain inside the cylinder and actively protecting the optical mirror of the ranging sensor, avoiding pollution and obstruction of the sensor by smoke, ensuring the long-term stability and reliability of measurement data, and greatly reducing maintenance requirements.

[0023] 4. This invention integrates four functional modules—measurement, monitoring, extraction, and purging—into one unit, achieving a high degree of integration and multifunctionality. The rigid cylinder cover has a compact structure and a high degree of integration, solving the problems of fragmented equipment, single function, and poor coordination, thereby improving production efficiency. Attached Figure Description

[0024] Figure 1 This is a front view structural diagram of the present invention;

[0025] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 3 This is a top view of the cylindrical cover structure of the present invention;

[0027] Figure 4 This is a schematic cross-sectional view of the cap structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the measurement module structure of the present invention;

[0029] Figure 6This is a schematic diagram of the gas extraction module structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the purified gas purging module structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the cap assembly structure of the present invention.

[0032] In the diagram: 1. Cylinder cover; 2. Motor cylinder; 3. Rotating base; 4. Rotary motor; 5. Support column; 6. Connecting arm; 7. First motor; 8. First lead screw; 9. Slide rail; 10. Limit block; 11. First slider; 12. Second motor; 13. Second lead screw; 14. Second slider; 15. Connecting piece; 16. Measuring window; 17. Transparent window; 18. Material height measuring module; 19. CO monitoring module; 20. Gas extraction module; 21. Purified gas blowing. 21. Sweeping module; 22. Sealing groove; 23. Sealing ring; 24. Laser rangefinder; 25. Horizontal motor; 26. Horizontal lead screw; 27. Fixing block; 28. Horizontal slider; 29. ​​Longitudinal motor; 30. Longitudinal lead screw; 31. Longitudinal slider; 32. Roller; 33. Slide groove; 34. Exhaust through hole; 35. Flow guide; 36. Exhaust fan; 37. Purge pipe; 38. Air supply line; 39. Inclined purge hole; 40. Central control module; 41. Electrode cylinder. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A contamination-proof cylinder cover assembly for electrode paste heating measurement includes three identical cylinder covers 1. Each cylinder cover 1 is adapted to an electrode cylinder 41 and integrates a material height measurement module 18, a CO monitoring module 19, a gas extraction module 20, and a purified gas purging module 21. The material height measurement module 18 includes: a transverse motor 25, a transverse lead screw 26, a transverse slider 28, a longitudinal motor 29, a longitudinal lead screw 30, a longitudinal slider 31, and a laser rangefinder 24.

[0037] The transverse motor 25 is fixedly installed on the upper surface of the cylinder cover 1. The transverse lead screw 26 is connected to the output end of the transverse motor 25. A fixing block 27 is fixedly installed on the cylinder cover 1 at the end of the transverse lead screw 26 away from the transverse motor 25. The transverse slider 28 is sleeved on the transverse lead screw 26. The longitudinal motor 29 is located inside the transverse slider 28. The output end of the longitudinal motor 29 extends outward in a vertical direction away from the transverse lead screw 26 and is connected to the longitudinal lead screw 30. The longitudinal slider 31 is sleeved on the longitudinal lead screw 30. The laser rangefinder 24 is embedded in the bottom of the longitudinal slider 31.

[0038] In the material height measuring module 18, the end of the longitudinal lead screw 30 away from the longitudinal motor 29 is connected to a roller 32 through a bearing, and a groove 33 for placing the roller 32 is opened on the surface of the cylinder cover 1 below the roller 32. A measuring window 16 is opened on the surface of the cylinder cover 1 below the material height measuring module 18. The measuring window 16 is rectangular and located at the center of the cylinder cover 1. The measuring window 16 penetrates the cylinder cover 1 and the inner wall surface of the measuring window 16 is smoothed. A transparent viewing window 17 is embedded in the lower part of the measuring window 16.

[0039] Furthermore, during the calcium carbide furnace smelting process, the electrode paste undergoes a phase transition from solid to graphitized within the electrode cylinder 41. Accurate measurement of the material height is crucial for controlling the feeding and optimizing the production process. Traditional measurement methods typically rely on static single-point measurements, which are easily affected by unevenness or local anomalies on the electrode paste surface, resulting in insufficient data representativeness. The material height measurement module 18 in this invention realizes the function of dynamic two-dimensional scanning measurement, significantly improving the accuracy and reliability of the data. The material height measurement module 18 completes a comprehensive scan of the material surface inside the electrode cylinder 41 through the coordinated work of various components.

[0040] A horizontal motor 25 is fixedly mounted on the upper surface of the cylinder cover 1. It drives a horizontal lead screw 26 to rotate via an output shaft. One end of the lead screw 26 is connected to the horizontal motor 25, and the other end is supported above the cylinder cover 1 by a fixing block 27, ensuring structural stability. A horizontal slider 28 is fitted onto the lead screw 26, and the internal thread of the slider 28 engages with the lead screw 26. When the horizontal motor 25 starts, the slider 28 moves axially along the lead screw 26, achieving lateral displacement. This design allows the laser rangefinder 24 to move horizontally. The vertical motor 29 is embedded inside the horizontal slider 28, and its output end is connected to the vertical lead screw 30. The orientation of the vertical lead screw 30 is perpendicular to the horizontal lead screw 26, thus realizing a two-dimensional motion plane. The vertical slider 31 is sleeved on the vertical lead screw 30 and is engaged with it by threads. Driven by the vertical motor 29, it moves in the vertical direction. The laser rangefinder 24 is fixed at the bottom of the vertical slider 31. Its detection optical path is aligned with the inside of the electrode cylinder 41 through the measuring window 16 on the cylinder cover 1, thereby acquiring material surface distance data in real time.

[0041] The measuring window 16 is located at the center of the cylinder cover 1 and has a rectangular structure. The measuring window 16 penetrates the cylinder cover 1 and has a transparent viewing window 17 embedded inside it. The transparent viewing window 17 is made of high temperature resistant transparent material, which can protect the internal components and ensure the transmission of laser signals. The inner wall of the measuring window 16 is smoothed to reduce the adhesion of dust and smoke, further ensuring the accuracy of the measurement. During the scanning process, the horizontal motor 25 and the vertical motor 29 move in coordination with the instructions of the central control module 40, driving the laser rangefinder 24 to move on a predefined path to form a gridded scanning mode, thereby acquiring data from multiple measurement points. The algorithm filters out data that deviates significantly from the normal value, and calculates the average material height based on the multi-point data. This dynamic scanning eliminates the influence of a single abnormal point and improves the representativeness of the results.

[0042] In addition, the material height measurement module 18 is also equipped with rollers 32 and slides 33 to enhance the accuracy and stability of movement. The end of the longitudinal lead screw 30 is connected to the rollers 32 through bearings. When the transverse slider 28 moves, the rollers 32 roll along the slides 33, preventing the longitudinal lead screw 30 from deviating in the transverse movement and ensuring the accurate positioning of the laser rangefinder 24. This not only reduces errors but also extends the service life of the equipment. In practical applications, the central control module 40 presets the scanning frequency and path and transmits the data to the host computer system in real time. Operators can adjust the feeding strategy based on this data to avoid production problems such as electrode breakage and energy waste caused by excessive or insufficient electrode paste.

[0043] Compared with traditional single-point measurement, the two-dimensional scanning function of the material height measurement module 18 greatly reduces the measurement deviation caused by local sintering or bubbles on the surface of the electrode paste. For example, during the operation of the calcium carbide furnace, the electrode paste may form an uneven surface due to uneven temperature. Single-point measurement can only reflect the local situation, while dynamic scanning can capture the overall trend and provide a reliable basis for precise control. At the same time, the automated design of the material height measurement module 18 reduces manual intervention, lowers labor intensity and maintenance frequency. The laser rangefinder 24 uses a high-precision sensor, and its measurement error is controlled at the millimeter level. Combined with the time series analysis of the scanning data, it can also predict the trend of material height change and realize preventive control. The material height measurement module 18 not only improves data quality but also optimizes production efficiency, demonstrating the technological advancement of this invention in the field of calcium carbide smelting equipment.

[0044] Example 2: Please refer to Figure 1 , Figure 2 and Figure 3 A contamination-proof cylinder cover assembly for electrode paste heating measurement includes three identical cylinder covers 1. The cylinder cover 1 is adapted to the electrode cylinder 41 and each cylinder cover 1 integrates a material height measurement module 18, a CO monitoring module 19, a gas extraction module 20, and a purified gas purging module 21. The CO monitoring module 19 is a CO concentration sensor. A sensor through hole is provided on the cylinder cover 1. The sensing head of the CO concentration sensor is fixedly embedded in the sensor through hole of the cylinder cover 1 as the detection end, and the sensing surface of the sensing head is flush with the lower surface of the cylinder cover 1. A short round tube is provided extending downward from the lower surface of the cylinder cover 1 to wrap the CO sensor sensing head, and an air inlet is provided on the side wall of the round tube near the bottom.

[0045] Furthermore, during the calcium carbide production process, the heating of the electrode paste releases a large amount of carbon monoxide gas. This colorless and odorless toxic substance is extremely easy to accumulate in confined spaces, causing safety accidents. Traditional CO monitoring often relies on independent sensors, which are scattered and have delayed response, making it impossible to achieve real-time early warning. The CO monitoring module 19 in this invention is integrated on each cylinder cover 1 of the cylinder cover group. Through a high-precision CO concentration sensor and optimized installation structure, it realizes continuous monitoring and rapid response of the gas inside the electrode cylinder 41, significantly improving the intrinsic safety level of the production site. The core of the CO monitoring module 19 is the CO concentration sensor. Its sensing head is fixedly embedded in the sensor through hole of the cylinder cover 1 as the detection end, and the sensing surface is flush with the lower surface of the cylinder cover 1, ensuring direct exposure to the gas environment inside the electrode cylinder 41.

[0046] To enhance the accuracy and reliability of monitoring, the CO monitoring module 19 also features a short circular tube structure that extends downwards from the lower surface of the cap 1 and wraps around the sensor head. An air inlet is located near the bottom of the tube's side wall. The tube guides the naturally rising CO gas inside the electrode cylinder 41 into the air inlet on its lower side, where it accumulates around the sensor head. The top and side walls of the tube create a relatively static, airtight chamber for the sensor head, effectively isolating it from direct impact and dilution by airflow from above and sides, and also preventing interference from upper dust or smoke. Due to the natural rise of hot gas, CO enters from the bottom. The circular tube is filled with gas to ensure that the sensor comes into contact with the most representative gas sample. At the same time, the circular tube provides physical protection to prevent electrode paste from splashing or high temperature from directly damaging the sensor. The airflow design inside the short circular tube is calculated to avoid eddies or dead zones, enabling the sensor to capture representative gas samples. The CO concentration sensor detects the CO concentration value in real time and transmits the signal to the central control module 40 through the built-in circuit. The central control module 40 sets a safety threshold. For example, when the CO concentration exceeds 50 ppm, it triggers an audible and visual alarm and automatically starts the gas extraction module 20 to eliminate danger in time.

[0047] The integrated design of the CO monitoring module 19 solves the coordination problem caused by the independent installation of sensors in traditional equipment. In traditional calcium carbide furnaces, CO monitoring often requires additional equipment and wiring, which increases the complexity of the equipment and the number of failure points. However, the present invention directly embeds the sensor into the cylinder cover 1 and connects it to the central control module 40 through a unified line, realizing centralized data processing and rapid decision-making. For example, when multiple electrode cylinders 41 are running at the same time, the central control module 40 can compare the CO concentration data of each cylinder, identify anomalies and locate the source of the problem, and assist operators in taking targeted measures. In addition, the CO concentration sensor uses high temperature resistant and corrosion resistant materials to adapt to the high temperature environment inside the calcium carbide furnace and ensure long-term stable operation.

[0048] In practical applications, the CO monitoring module 19 is not only used for safety early warning, but can also be combined with production data to optimize process parameters. For example, changes in CO concentration can reflect the heating status and chemical reaction degree of the electrode paste. Excessively high concentration may indicate uneven heating or raw material problems. Through historical data analysis, the correlation between CO emission patterns and production efficiency can be established, providing a basis for process improvement. At the same time, the CO monitoring module 19, through its high integration and intelligent analysis, reduces the frequency of manual inspections and lowers the probability of personnel being exposed to hazardous environments. This not only improves safety but also enhances the transparency and controllability of the production process, demonstrating the innovative value of this invention in multifunctional integration.

[0049] Example 3: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 A contamination-proof cap assembly for electrode paste heating measurement includes three identical caps 1. Each cap 1 is adapted to an electrode cylinder 41 and integrates a material height measurement module 18, a CO monitoring module 19, a gas extraction module 20, and a purified gas purging module 21. The gas extraction module 20 is also fixedly installed on the upper surface of the cap 1. The gas extraction module 20 consists of an exhaust port 34, a flow guide 35, and an exhaust fan 36. The exhaust port 34 is opened on the cap 1 and covered by the frustum-shaped flow guide 35. Above the exhaust port 34 and fixedly installed on the upper surface of the cylinder cover 1, the small end opening of the guide shroud 35 is sealed to the air inlet of the exhaust fan 36 through a flange, the air outlet of the exhaust fan 36 is connected to an external exhaust pipe, the large end opening of the guide shroud 35 is tightly fixed to the cylinder cover 1 with bolts and completely covers the exhaust port 34, the internal cavity of the guide shroud 35 is connected to the internal cavity of the electrode cylinder 41 through the exhaust port 34 to form an inlet, and the internal flow channels of the exhaust port 34 and the guide shroud 35 are both smoothed;

[0050] Furthermore, in the calcium carbide furnace smelting process, the electrode paste heating not only generates CO gas but also releases fumes and dust. These pollutants accumulate inside the electrode cylinder 41, affecting the accuracy of the measuring equipment and potentially posing a fire or explosion risk. Traditional exhaust modules are often separate from the cylinder cover 1, resulting in low efficiency and easy clogging. In this invention, the gas extraction module 20 is directly integrated into each cylinder cover 1. Through the coordinated operation of the exhaust vent 34, the guide shroud 35, and the exhaust fan 36, rapid extraction and directional export of harmful gases are achieved, significantly improving the internal environment of the cylinder. The gas extraction module 20 is fixedly installed on the upper surface of the cylinder cover 1, and the exhaust vent 34 on the cylinder cover 1 serves as the gas intake port, directly... The inner wall of the guide shroud 35 is smoothed to reduce airflow resistance and dust adhesion. The guide shroud 35 is truncated cone-shaped. The large end opening is tightly fixed to the cylinder cover 1 with bolts and completely covers the exhaust port 34. The small end opening is sealed to the air inlet of the exhaust fan 36. When the exhaust fan 36 is started, a negative pressure zone is formed inside the guide shroud 35, which efficiently draws in the gas in the electrode cylinder 41. The truncated cone shape of the guide shroud 35 can gradually accelerate the airflow, reduce turbulence and energy loss, and ensure extraction efficiency. The exhaust fan 36 is made of high-temperature resistant material. Its outlet is connected to the external exhaust pipe to export harmful gases to the purification system or safe area to prevent on-site pollution.

[0051] The operation of the gas extraction module 20 is controlled by the central control module 40 based on the data from the CO monitoring module 19 and the preset program. For example, when the CO concentration exceeds the standard or the sensor detects smoke accumulation, the central control module 40 will start the exhaust fan 36 to run at a specific air volume until the gas concentration returns to normal. The fan speed is adjustable, allowing the extraction intensity to be optimized according to the actual situation, avoiding excessive extraction that could lead to energy waste or temperature fluctuations. The internal flow channel of the guide shroud 35 is also smoothed to further reduce friction loss and ensure long-term operational reliability. In practical applications, the gas extraction module 20 not only extracts harmful gases but also helps to reduce the temperature inside the cylinder and prevent the electrode paste from overheating and deteriorating. For example, in high-temperature seasons, the exhaust fan 36 can run intermittently to introduce external cooling air and maintain the thermal balance inside the cylinder.

[0052] Compared to traditional independent exhaust equipment, the integrated design of the gas extraction module 20 saves space, reduces piping layout, and improves response speed. In traditional equipment, exhaust often requires multiple fans and complex piping, which is prone to leakage and difficult to maintain. However, the gas extraction module 20 is located directly above the pollution source and extracts through a short path, resulting in higher efficiency. At the same time, the sealed design of the gas extraction module 20 prevents gas leakage and ensures the safety of the working environment. The fixing method of the flow guide shroud 35 also facilitates disassembly and cleaning, reducing maintenance downtime. Through efficient airflow design and intelligent control, the gas extraction module 20 not only improves safety but also optimizes the production environment, demonstrating the advantages of this invention in functional integration and automation.

[0053] Example 4: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 A contamination-proof cap assembly for electrode paste heating measurement includes three identical caps 1. Each cap 1 is adapted to an electrode cylinder 41 and integrates a material height measurement module 18, a CO monitoring module 19, a gas extraction module 20, and a purified gas purging module 21. The purified gas purging module 21 includes an annular purging pipe 37 and a gas supply pipe 38. The annular purging pipe 37 is embedded in the lower surface of the cap 1, and the central axis of the purging pipe 37 is aligned with the detection range of the laser rangefinder 24. The optical path axes coincide, and a series of miniature inclined purge holes 39 are uniformly drilled along the circumferential direction on the inner side wall of the purge tube 37. The axes of all inclined purge holes 39 form an acute angle with the radial direction and point to the lower part of the central axis of the purge tube 37. The air supply line 38 is connected to the purge tube 37. The end of the air supply line 38 away from the purge tube 37 passes through the cylinder cover 1 and is connected to the external purified air source. The external purified air source is connected to the inner cavity of the purge tube 37 through the air supply line 38 to form the purge outlet.

[0054] Furthermore, during the operation of the calcium carbide furnace, the smoke and dust generated by heating the electrode paste easily adhere to the optical measurement equipment, causing mirror contamination of the laser rangefinder 24, resulting in data drift or failure. Traditional methods rely on manual cleaning, frequently interrupting production and resulting in low efficiency. The purified gas purging module 21 of this invention is integrated into the lower surface of each cylinder cover 1. Through the annular purging pipe 37 and the air supply pipe 38, a local air curtain is formed around the laser rangefinder 24, actively preventing contaminants from contacting the optical components, ensuring the long-term stability and accuracy of the measurement. The purified gas purging module 21 includes an annular purging pipe 37 embedded in the lower surface of the cylinder cover 1, whose central axis coincides with the detection optical path axis of the laser rangefinder 24. A series of micro-inclined purging holes 39 are uniformly drilled along the circumference on the inner wall of the purging pipe 37. The axes of the inclined purge holes 39 are all at acute angles to the radial direction and point together to the lower part of the central axis of the purge tube 37. The air supply line 38 is connected to the purge tube 37, and the other end passes through the cylinder cover 1 and is connected to the external purified air source. The purified air is usually compressed air or inert gas, which is filtered to ensure that it is free of oil and dust. When the purified air purge module 21 is started, the purified air enters the inner cavity of the purge tube 37 through the air supply line 38 and is ejected at high speed from the inclined purge holes 39. The airflow converges at the lower part of the central axis and forms a conical air curtain, covering the detection path of the laser rangefinder 24. This air curtain not only disperses the nearby smoke and dust, but also generates a slight positive pressure to prevent contaminants from approaching the mirror surface, thereby keeping the optical components clean. The size and spacing of the inclined purge holes 39 are calculated to ensure that the airflow is evenly distributed and to avoid local dead corners.

[0055] The operation of the purging gas module 21 is controlled by the central control module 40. It can be automatically adjusted according to the usage frequency of the material height measurement module 18 or environmental conditions. For example, before each scan, the purging gas module 21 will pre-start for a few seconds to remove potential contaminants. In high temperature and high smoke environments, purging may continue to maintain the protective effect. The design of the purging gas module 21 also takes energy saving into consideration. The airflow rate is adjustable to avoid excessive consumption of gas source. In practical applications, the purging gas module 21 significantly reduces the maintenance requirements of the laser rangefinder 24. Traditionally, it may require daily cleaning, but now it can be extended to several weeks, which greatly improves equipment availability and production efficiency. At the same time, the directional design of the purging airflow avoids interference with other processes inside the electrode cylinder 41.

[0056] Compared to traditional protective covers or passive filtration, the active purging method of this purified gas purging module 21 is more adaptable to the harsh environment of the calcium carbide furnace. Passive measures are easily blocked by pollutants and require frequent replacement, while the dynamic isolation of the air curtain has a more lasting effect. In addition, the purified gas purging module 21 has a compact structure that does not occupy extra space, reflecting a high degree of integration. The material of the purging pipe 37 is resistant to high temperature and corrosion and is suitable for long-term operation. The sealing treatment of the gas supply pipeline 38 prevents gas leakage and ensures airflow efficiency. By cooperating with other modules, such as the gas extraction module 20, to reduce the overall smoke concentration, the purified gas purging module 21 further optimizes the local environment. Through innovative airflow design and intelligent control, the purified gas purging module 21 not only protects key measuring equipment but also reduces operating costs, demonstrating the breakthrough of this invention in pollution prevention technology.

[0057] Example 5: Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 8 A contamination-proof cap assembly for electrode paste heating measurement includes three identical caps 1. An annular sealing groove 22 is provided at the bottom edge of the cap 1 near the position where it cooperates with the electrode cylinder 41. A sealing ring 23 is pressed into the sealing groove 22 with an interference fit. The sealing ring 23 is made of high-temperature resistant silicone rubber. A cable through hole is provided on the upper surface of the cap 1. All through holes on the cap 1 are sealed.

[0058] The cylinder cover 1 is mounted on the drive support structure, which includes a support column 5 and a connecting arm 6. Both the support column 5 and the connecting arm 6 are I-shaped. The support column 5 is vertically mounted on the rotating base 3. A rotary motor 4 is mounted on the surface of the rotating base 3 in contact with the support column 5. The bottom of the rotating base 3 is connected to the motor cylinder 2. A first motor 7 is mounted inside the motor cylinder 2. A first lead screw 8 is vertically mounted inside the support column 5. The lower end of the first lead screw 8 passes through the center of the rotating base 3 and extends downward to connect with the output end of the first motor 7. A first slider 11 is mounted on the first lead screw 8. A slide rail 9 that matches the first slider 11 is vertically mounted on the side wall of the support column 5. Limit blocks 10 are mounted at both ends of the slide rail 9. The side of the first slider 11 is fixedly connected to the horizontally mounted connecting arm 6.

[0059] A second lead screw 13 is horizontally arranged inside the connecting arm 6 of the drive bracket structure. A second motor 12 is arranged inside the first slider 11. One end of the second lead screw 13 near the support column 5 passes through the first slider 11 and is connected to the output end of the second motor 12. Two second sliders 14 are sleeved on the second lead screw 13. A connector 15 is fixedly installed at the bottom of each of the two second sliders 14. The end of the connector 15 away from the second slider 14 is hinged to the upper surface of the cylinder cover 1 near the edge. A torsion spring that provides adaptive clamping force is also provided at the hinge of the connector 15 and the cylinder cover 1.

[0060] The number of cylinder covers 1 is three. The three cylinder covers 1 have the same structure and are respectively installed on three drive bracket structures. The three cylinder covers 1 are distributed at 120 degrees of equal angle around a center point to form a cylinder cover group. A central control module 40 is set at the center point. The central control module 40 is connected to the rotary motor 4, the first motor 7, the second motor 12, the material height measurement module 18, the CO monitoring module 19, the gas extraction module 20, and the purified gas purging module 21 through the signal lines built into the drive bracket structure.

[0061] Furthermore, the anti-pollution cylinder cover assembly of the present invention consists of three identical cylinder covers 1. Each cylinder cover 1 integrates the functions of measurement, monitoring, pumping and purging, and achieves precise movement and positioning through a drive support structure. This design solves the problems of dispersed functions and poor coordination in traditional equipment, and improves overall production efficiency and safety. The drive support structure includes a support column 5, a connecting arm 6, a rotating base 3, and a motor cylinder 2, which together control the lifting, rotation and horizontal movement of the cylinder cover 1 to ensure its sealed fit with the electrode cylinder 41.

[0062] A support column 5 is vertically mounted on a rotating base 3. A first lead screw 8 is vertically mounted inside the support column 5. The lower end of the first lead screw 8 is connected to a first motor 7 inside a motor cylinder 2. A first slider 11 is mounted on the first lead screw 8. A slide rail 9 and a limit block 10 on the side wall of the support column 5 guide the movement of the first slider 11 to prevent overtravel. A horizontally mounted connecting arm 6 is fixedly connected to the side of the first slider 11. A second lead screw 13 is horizontally mounted inside the connecting arm 6. The second lead screw 13 is driven by a second motor 12 inside the first slider 11. Two second sliders 14 are mounted on the second lead screw 13. The bottom of each second slider 14 is hinged to the cover 1 via a connector 15. A torsion spring is provided at the connector 15 to provide adaptive clamping force, ensuring a tight seal between the cover 1 and the electrode cylinder 41. This multi-degree-of-freedom design allows the cover 1 to be precisely positioned in three-dimensional space. For example, the angle of the cover 1 can be adjusted by driving the rotating base 3 with the rotary motor 4; the lifting and lowering can be controlled by the first motor 7 to adapt to electrode cylinders 41 at different heights; and the horizontal movement can be controlled by the second motor 12 to achieve rapid covering or removal.

[0063] The bottom of the cylinder cover 1 is provided with an annular sealing groove 22. A high-temperature resistant silicone rubber sealing ring 23 is pressed into the sealing groove 22 with an interference fit. When the cylinder cover 1 is pressed tightly on the electrode cylinder 41, the sealing ring 23 forms an airtight seal to prevent gas leakage and external contaminants from entering. All through holes on the cylinder cover 1 are sealed. Cable holes are used to connect the various components on the cylinder cover 1 to the central control module 40 to achieve unified signal transmission. The central control module 40 is located at the center point of three cylinder covers 1 distributed at 120-degree angles. It coordinates the actions of all modules and drive structures. For example, during the measurement process, the central control module 40 will first start the purification gas purging module 21, and then drive the material height measurement module 18 to perform scanning, while monitoring the CO concentration and triggering gas extraction when necessary.

[0064] The integrated cylinder cover assembly enables multi-functional collaborative operation. In traditional equipment, functions such as measurement, monitoring, extraction, and sealing are performed by independent devices, which are complex to install and prone to conflict. However, this invention condenses all functions into the cylinder cover 1, which can be flexibly moved by the drive support structure, reducing the number of devices and the space occupied. In practical applications, operators can preset programs through the host computer, such as automatic periodic measurement and venting. The equipment automatically executes and feeds back data, reducing manual intervention. The adaptive clamping mechanism of the drive support structure also allows the cylinder cover 1 to adapt to the slight deformation or displacement of the electrode cylinder 41, ensuring long-term sealing. In addition, the modular design facilitates maintenance and upgrades. When a single cylinder cover 1 or component is damaged, it can be directly replaced, minimizing downtime. Through mechanical innovation and intelligent control, the cylinder cover assembly not only improves the accuracy and safety of electrode paste heating measurement, but also optimizes the production process, demonstrating the high level of integration and automation of this invention in the field of calcium carbide smelting equipment.

[0065] Working principle: The operator coordinates the drive support structure of the three cylinder covers 1 through the central control module 40, so that the cylinder cover 1 is lowered and pressed tightly and sealed with the electrode cylinder 41. Then, the purification gas purging module 21 is started first, continuously blowing purification gas under the optical mirror of the laser rangefinder 24 to form a protective air curtain to prevent smoke pollution. Next, the material height measurement module 18 starts to work. The horizontal motor 25 and the vertical motor 29 drive the laser rangefinder 24 to perform two-dimensional dynamic scanning along a predetermined path to measure the distance of the electrode paste surface at multiple points. The data is uploaded in real time. During this process, the CO monitoring module 19 continuously detects the gas concentration in the cylinder. If the CO concentration is found to be excessive, the central control module 40 immediately activates the gas extraction module 20, and the exhaust fan 36 runs to quickly extract the harmful gas and discharge it through the external pipeline. After the entire measurement and monitoring task is completed, each module stops in sequence, the drive support lifts the cylinder cover 1 to the ready position, enters the standby state, and waits for the next work cycle instruction. This process realizes the fully automatic integrated operation of measurement, pollution prevention, monitoring and exhaust.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A contamination-proof cap assembly for electrode paste heating and measurement, characterized in that: Includes three identical cylinder caps (1), which are adapted to electrode cylinders (41) and each cylinder cap (1) integrates a material height measurement module (18), a CO monitoring module (19), a gas extraction module (20) and a purified gas purging module (21). The material height measurement module (18) includes: a transverse motor (25), a transverse lead screw (26), a transverse slider (28), a longitudinal motor (29), a longitudinal lead screw (30), a longitudinal slider (31) and a laser rangefinder (24). The horizontal motor (25) is fixedly installed on the upper surface of the cylinder cover (1). The horizontal lead screw (26) is connected to the output end of the horizontal motor (25). A fixing block (27) is fixedly installed on the cylinder cover (1) at the end of the horizontal lead screw (26) away from the horizontal motor (25). The horizontal slider (28) is sleeved on the horizontal lead screw (26). The vertical motor (29) is located inside the horizontal slider (28). The output end of the vertical motor (29) extends outward in a vertical direction away from the horizontal lead screw (26) and is connected to the vertical lead screw (30). The vertical slider (31) is sleeved on the vertical lead screw (30). The laser rangefinder (24) is embedded in the bottom of the vertical slider (31).

2. The anti-contamination cylinder cover assembly for electrode paste heating measurement according to claim 1, characterized in that: In the material height measuring module (18), the end of the longitudinal screw (30) away from the longitudinal motor (29) is connected to a roller (32) through a bearing, and a groove (33) for placing the roller (32) is provided on the surface of the cylinder cover (1) below the roller (32). A measuring window (16) is provided on the surface of the cylinder cover (1) below the material height measuring module (18). The measuring window (16) is rectangular and located in the center of the cylinder cover (1). The measuring window (16) penetrates the cylinder cover (1) and the inner wall surface of the measuring window (16) is smoothed. A transparent viewing window (17) is embedded in the lower part of the measuring window (16).

3. The anti-contamination cylinder cover assembly for electrode paste heating measurement according to claim 1, characterized in that: The CO monitoring module (19) is a CO concentration sensor. A sensor through hole is provided on the cylinder cover (1). The sensing head of the CO concentration sensor is fixedly embedded in the sensor through hole of the cylinder cover (1) as the detection end. The sensing surface of the sensing head is flush with the lower surface of the cylinder cover (1). A short round tube that wraps the CO sensor sensing head is provided extending downward from the lower surface of the cylinder cover (1). An air inlet is provided on the side wall of the round tube near the bottom.

4. The anti-contamination cylinder cover assembly for electrode paste heating measurement according to claim 1, characterized in that: The gas extraction module (20) is also fixedly installed on the upper surface of the cylinder cover (1). The gas extraction module (20) consists of an exhaust port (34), a flow guide (35) and an exhaust fan (36). The exhaust port (34) is opened on the cylinder cover (1). The flow guide (35) in the shape of a frustum covers the exhaust port (34) and is fixedly installed on the upper surface of the cylinder cover (1). The small end opening of the flow guide (35) is sealed to the air inlet of the exhaust fan (36) through a flange. The air outlet of the exhaust fan (36) is connected to an external exhaust pipe. The large end opening of the flow guide (35) is tightly fixed to the cylinder cover (1) with bolts and completely covers the exhaust port (34). The internal cavity of the flow guide (35) is connected to the internal cavity of the electrode cylinder (41) through the exhaust port (34) to form an intake port. The internal flow channels of the exhaust port (34) and the flow guide (35) are both smoothed.

5. The anti-contamination cylinder cover assembly for electrode paste heating measurement according to claim 1, characterized in that: The purified gas purging module (21) includes an annular purging pipe (37) and a gas supply pipe (38). The annular purging pipe (37) is embedded on the lower surface of the cylinder cover (1), and the central axis of the purging pipe (37) coincides with the detection optical path axis of the laser rangefinder (24). A series of miniature inclined purging holes (39) are uniformly drilled along the circumferential direction on the inner wall of the purging pipe (37). The axis of all inclined purging holes (39) forms an acute angle with the radial direction and points to the lower part of the central axis of the purging pipe (37). The gas supply pipe (38) is connected to the purging pipe (37). The end of the gas supply pipe (38) away from the purging pipe (37) passes through the cylinder cover (1) and is connected to an external purified gas source. The external purified gas source is connected to the inner cavity of the purging pipe (37) through the gas supply pipe (38) to form a purging outlet.

6. The anti-contamination cylinder cover assembly for electrode paste heating measurement according to claim 1, characterized in that: An annular sealing groove (22) is provided at the bottom edge of the cylinder cover (1) where it cooperates with the electrode cylinder (41). A sealing ring (23) is pressed into the sealing groove (22) with an interference fit. The sealing ring (23) is made of high temperature resistant silicone rubber. A cable through hole is provided on the upper surface of the cylinder cover (1). All through holes on the cylinder cover (1) are sealed.

7. The anti-contamination cylinder cover assembly for electrode paste heating measurement according to claim 1, characterized in that: The cylinder cover (1) is installed on the drive bracket structure. The drive bracket structure includes a support column (5) and a connecting arm (6). Both the support column (5) and the connecting arm (6) are in the shape of an I-beam. The support column (5) is vertically set on the rotating base (3). A rotary motor (4) is set on the surface of the rotating base (3) in contact with the support column (5). The bottom of the rotating base (3) is connected to the motor cylinder (2). A first motor (7) is set inside the motor cylinder (2). A first lead screw (8) is vertically set inside the support column (5). The lower end of the first lead screw (8) passes through the center of the rotating base (3) and extends downward to connect with the output end of the first motor (7). A first slider (11) is sleeved on the first lead screw (8). A slide rail (9) that is adapted to the first slider (11) is vertically set on the side wall of the support column (5). Limit blocks (10) are set at both ends of the slide rail (9). The side of the first slider (11) is fixedly connected to the horizontally set connecting arm (6).

8. The anti-contamination cylinder cover assembly for electrode paste heating measurement according to claim 7, characterized in that: A second lead screw (13) is horizontally arranged inside the connecting arm (6) of the drive bracket structure. A second motor (12) is arranged inside the first slider (11). The end of the second lead screw (13) near the support column (5) passes through the first slider (11) and is connected to the output end of the second motor (12). Two second sliders (14) are sleeved on the second lead screw (13). A connector (15) is fixedly installed at the bottom of each of the two second sliders (14). The end of the connector (15) away from the second slider (14) is hinged to the upper surface of the cylinder cover (1) near the edge. A torsion spring that provides adaptive clamping force is also provided at the hinge of the connector (15) and the cylinder cover (1).

9. A contamination-proof cap assembly for electrode paste heating and measurement according to claim 7, characterized in that: The first slider (11), the second slider (14), the transverse slider (28) and the longitudinal slider (31) are respectively drilled with threads that are compatible with the first lead screw (8), the second lead screw (13), the transverse lead screw (26) and the longitudinal lead screw (30).

10. The anti-contamination cylinder cover assembly for electrode paste heating measurement according to claim 1, characterized in that: The number of cylinder covers (1) is three. The three cylinder covers (1) have the same structure and are respectively installed on three drive bracket structures. The three cylinder covers (1) are distributed around a center point at 120° angles to form a cylinder cover group. A central control module (40) is set at the center point. The central control module (40) is connected to the rotary motor (4), the first motor (7), the second motor (12), the material height measurement module (18), the CO monitoring module (19), the gas extraction module (20), and the purified gas purging module (21) through the signal lines built into the drive bracket structure.

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