A clean coke oven gas collector

Abstract

This utility model discloses a clean coke oven gas collecting pipe, belonging to the field of coking production equipment. It includes a gas collecting pipe, a mounting frame, a wind tunnel assembly, and a cleaning mechanism. The wind tunnel assembly has a flared end at the front of the wind tunnel pipe, internally connected to a sliding rod with a baffle plate. The sliding rod is connected to the wind tunnel pipe via a spring, and its tail end extends into the mounting box to trigger a proximity switch to control the motor's start and stop. The motor drives a connecting rod and a scraper to rotate and scrape away impurities from the inner wall of the gas collecting pipe. The scraper has a built-in electric heating wire to prevent tar condensation. A collection trough and a removable drawer are provided at the bottom of the gas collecting pipe for waste collection. This utility model achieves automatic triggering and resetting of the cleaning mechanism through dynamic balance of gas pressure and spring force, eliminating the need for external timer control, saving energy, and responding to the need for scale removal in real time. The flared end and exhaust port optimize airflow guidance and pressure balance, and the electric heating wire improves cleaning efficiency in low-temperature environments. This solves the problems of low cleaning efficiency, inconvenient maintenance, and low-temperature adhesion associated with traditional gas collecting pipes.

Description

Technical Field

[0001] This utility model relates to the field of coking production equipment technology, and in particular to a clean coke oven gas collecting pipe. Background Technology

[0002] In the coking process, the coke oven gas collecting pipe is a key piece of equipment used to collect mixed gases such as coke oven gas and tar vapor. Because the gas contains impurities such as tar and dust, long-term operation can easily lead to the formation of adhesive scale on the inner wall of the collecting pipe, resulting in increased flow resistance, decreased gas collection efficiency, and even localized blockages, affecting normal coke oven production. Therefore, keeping the inner wall of the collecting pipe clean is a crucial step in ensuring the stable operation of coking production.

[0003] In the prior art, utility model patent CN214937217U discloses a clean coke oven gas collecting pipe. It uses a rotating shaft and scraper inside the main pipe, with a rotating motor driving the scraper to remove tar from the inner wall. The scraped tar is then discharged into an oil collecting tank through a tar discharge pipe. While this solution achieves a certain degree of automatic cleaning, it still has the following shortcomings:

[0004] The cleaning triggering mechanism relies on external power to run continuously: it needs to drive the scraper continuously or periodically by rotating the motor, which consumes a lot of energy and cannot adaptively start cleaning according to the actual amount of dirt in the air collection pipe, which may lead to untimely or excessive cleaning.

[0005] The cleaning effect is limited in low-temperature environments: the characteristic that tar is easy to solidify and harden at low temperatures is not taken into account. The scraper may become more resistant to scraping due to tar sticking, or even lose its cleaning ability.

[0006] Waste collection and cleaning are inconvenient: the tar discharge pipe only collects waste through the connecting port. If the scale particles are large or sticky, they are easy to get stuck and clogged in the discharge pipe, and there is a lack of convenient maintenance structure.

[0007] To address the aforementioned issues, this utility model provides a clean coke oven gas collecting pipe. Through a pressure-sensing triggered cleaning mechanism, a scraper heating anti-sticking design, and a high-efficiency waste collection structure, it achieves intelligent cleaning and convenient maintenance of the inner wall of the gas collecting pipe, thus overcoming the shortcomings of existing technologies. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by proposing a clean coke oven gas collecting pipe.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A clean coke oven gas collecting pipe includes a gas collecting pipe 1, an installation frame 2 inside the gas collecting pipe 1, an installation box 4 near the gas outlet of the gas collecting pipe 1 on the installation frame 2, a motor 6 on the outer wall of the installation box 4, a rotating shaft coaxially provided on the output shaft of the motor 6, and multiple connecting rods 7 evenly distributed on the outer circumference of the rotating shaft, each connecting rod 7 having a scraper 8 at its end, the ends of the scraper 8 slidingly abutting against the inner wall of the gas collecting pipe 1, a wind duct assembly 3 at the center of the installation frame 2 near the gas inlet of the gas collecting pipe 1, the wind duct assembly 3 including a wind duct pipe 31, a sliding rod 33 slidably inserted at the end of the wind duct pipe 31, the sliding rod 33 slidingly passing through the installation frame 2 and the wind duct pipe 31, and the end extending into the interior of the installation box 4, a baffle plate 35 coaxially provided at the end of the sliding rod 33 away from the installation box 4, and a proximity switch 5 coaxially provided on the inner wall of the installation box 4.

[0011] The above technical solution achieves pressure-sensing triggering of the cleaning system through the linkage of the air duct assembly, proximity switch, and motor. Pressure changes within the air collection pipe move the baffle, triggering the proximity switch to start the motor, which in turn rotates the scraper to clean the inner wall. This eliminates the need for manual intervention or additional control systems, reducing energy consumption and providing real-time response to pipe buildup, thus improving cleaning efficiency and system intelligence.

[0012] Preferably, the open end of the ventilation duct 31 is provided with an outwardly opening flared mouth 32.

[0013] The above technical solutions increase the cross-sectional area of ​​the air intake end, focusing the airflow to the baffle plate, enhancing the effect of gas pressure on the baffle plate, improving the sensitivity and accuracy of pressure sensing, ensuring that the cleaning system can be triggered quickly and stably when the pressure changes, and avoiding misjudgment or delayed triggering caused by airflow dispersion.

[0014] Preferably, the tail end of the air duct 31 is provided with multiple exhaust holes 36 for air circulation.

[0015] Through the above technical solutions, the exhaust port can divert some gas when the pressure in the gas collection pipe is too high, such as when a sudden working condition causes overpressure. This prevents excessive displacement of the baffle plate due to excessive pressure in the air duct, protects components such as springs and proximity switches, avoids damage to components caused by sudden pressure increases, and ensures the long-term stable operation of the pressure sensing trigger system.

[0016] Furthermore, each scraper 8 is equipped with an electric heating wire 9 inside.

[0017] The above technical solution maintains the scraper temperature above the tar softening point with an electric heating wire, preventing tar from solidifying and hardening at low temperatures. This avoids increased scraping resistance or cleaning failure due to tar adhesion between the scraper and the inner wall. At the same time, it softens stubborn deposits, significantly improving the scraper's efficiency in removing impurities and extending the scraper's service life.

[0018] Furthermore, the bottom of the gas collection pipe 1 is provided with a collection trough 10 for collecting waste materials.

[0019] The above technical solutions allow the collection tank to collect impurities scraped off by the scraper, preventing waste from accumulating and clogging the gas collection pipe, ensuring smooth gas flow inside the pipe, reducing the frequency of maintenance caused by waste accumulation, and ensuring the long-term stable operation of the gas collection pipe.

[0020] Preferably, a removable drawer plate 11 is slidably inserted into the bottom of the collection trough 10.

[0021] The above technical solutions enable workers to quickly remove waste from the collection tank without disassembling the entire gas collection pipe structure, simplifying the cleaning process, reducing maintenance labor intensity, and improving maintenance efficiency. At the same time, the sealing design prevents gas leakage and ensures the safe operation of the gas collection pipe.

[0022] Preferably, a spring 34 is fitted onto the slide bar 33 at the position between the inner wall of the end of the air duct 31 and the wind baffle 35.

[0023] Through the above technical solutions: the spring provides the restoring force, so that the baffle plate automatically returns to its original position when the pressure in the air collection pipe decreases, realizing the automatic start and stop cycle of the cleaning system; by reasonably designing the elastic coefficient and compression amount of the spring, the trigger pressure threshold of the cleaning system can be accurately set, ensuring that the cleaning operation is accurately started when the pipe is sludge-covered.

[0024] The beneficial effects of this utility model are as follows:

[0025] 1. This utility model achieves automatic cleaning and efficient maintenance of the inner wall of the coke oven gas collecting pipe through pressure sensing triggering and mechanical structure linkage: Utilizing the air duct assembly and spring mechanism, based on the dynamic balance of gas pressure and spring force, the scraper rotation cleaning operation is automatically started or stopped without manual intervention, saving energy and responding to the need for scale removal in real time; the scraper has a built-in electric heating wire to maintain a high temperature, preventing tar from condensing at low temperature and softening stubborn deposits, thus improving the cleaning effect; the flared mouth and exhaust hole optimize airflow guidance and pressure balance, ensuring the stability and reliability of the triggering system; the bottom collection trough, combined with a detachable drawer, enables convenient collection of waste and leak-free cleaning, significantly reducing maintenance frequency and labor intensity, and effectively solving the problems of decreased flow efficiency, increased energy consumption, and inconvenient maintenance caused by scale accumulation in traditional gas collecting pipes.

[0026] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0027] Figure 1This is a three-dimensional structural diagram of a clean coke oven gas collecting pipe proposed in this utility model;

[0028] Figure 2 This is a schematic diagram of the internal cross-sectional structure of a clean coke oven gas collecting pipe proposed in this utility model;

[0029] Figure 3 This is a schematic cross-sectional view of the air duct assembly of a clean coke oven gas collecting pipe proposed in this utility model.

[0030] Figure 4 This utility model proposes a clean coke oven gas collecting pipe. Figure 3 A partial structural diagram (enlarged view of the duct assembly) at point A.

[0031] In the diagram: 1. Air collection pipe; 2. Mounting bracket; 3. Air duct assembly; 31. Air duct pipe; 32. Flare mouth; 33. Slide rod; 34. Spring; 35. Baffle plate; 36. Exhaust port; 4. Mounting box; 5. Proximity switch; 6. Motor; 7. Connecting rod; 8. Scraper; 9. Heating wire; 10. Collection trough; 11. Drawer plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0033] Example 1

[0034] I. Overall structural assembly

[0035] like Figure 1-4 As shown, the clean coke oven gas collecting pipe includes a cylindrical gas collecting pipe 1 with a smooth and corrosion-resistant inner wall.

[0036] Mounting bracket 2 is a cross-shaped metal bracket, which is fixed to the middle section of the air collection pipe 1 by welding or bolting. A through hole is opened in the center of the bracket to install the air duct assembly 3.

[0037] The air duct assembly 3 has a cylindrical air duct 31 with an outwardly expanding flared mouth 32 welded to the front end and multiple exhaust holes 36 evenly distributed at the rear end. The air duct 31 is fixed to the mounting bracket 2 near the air inlet through the bracket through hole, and its axis coincides with the axis of the air collection pipe 1.

[0038] The slide bar 33 is a metal rod with a diameter of 15-20mm. Its front end passes through the center hole of the front plate of the air duct 31 and is welded and fixed to the wind baffle 35. The tail end of the slide bar 33 passes through the center hole of the mounting bracket 2 and extends into the mounting box 4. The tail end face is coaxially aligned with the proximity switch 5.

[0039] Spring 34 is sleeved in the middle of slide bar 33, with one end abutting the inner wall of the front end plate of air duct 31 and the other end abutting the back of wind baffle 35. In the initial state, the spring compression is 5-10mm.

[0040] The motor 6 is fixed to the outer wall of the mounting box 4 by bolts. The motor output shaft passes through the side wall of the mounting box and is connected to the rotating shaft. 3-4 connecting rods 7 are welded on the rotating shaft, and scraper 8 is fixed to the end of the connecting rod.

[0041] The scraper 8 has an embedded electric heating wire 9.

[0042] A rectangular slot is opened at the bottom of the gas collecting pipe 1, and a collecting groove 10 is slidably embedded in the slot. The bottom of the collecting groove is connected to the drawer plate 11 through a dovetail guide rail or a T-shaped slide.

[0043] II. Connection and Fit of Key Components

[0044] Air duct assembly trigger mechanism

[0045] The slide rod 33, the front end plate of the air duct 31, and the center hole of the mounting bracket 2 are all fitted with clearance to ensure that the slide rod can slide freely axially and is radially stable.

[0046] The proximity switch 5 is fixed to the inner wall of the mounting box 4 by bolts. The distance between the sensing surface and the tail end face of the slide rod 33 is preset to 5mm. The switch signal line is connected to the motor control circuit.

[0047] Cleaning execution agencies

[0048] A 0.5-1mm sliding gap is reserved between the end of the scraper 8 and the inner wall of the gas collecting pipe 1 to ensure close scraping while avoiding jamming; the electric heating wire 9 is fixed in the groove of the scraper with high-temperature resistant insulating glue, and the wire is led out from the reserved hole of the mounting bracket 2.

[0049] Waste collection structure

[0050] A sealing ring is provided at the edge of the collection tank 10 to prevent gas leakage; the drawer plate 11 has raised edges on both sides that cooperate with the sliding groove at the bottom of the collection tank.

[0051] Working principle:

[0052] This invention uses the air duct assembly 3 and related components to sense and respond to pressure changes within the air collecting pipe 1. The flared opening 32 at the front end of the air duct 31 expands the air intake area, enhancing the effect of gas pressure on the baffle plate 35. When the pressure within the air collecting pipe 1 is within the normal operating range, the gas pressure on the baffle plate 35 is balanced with the preload of the spring 34, the slide bar 33 remains stationary, the proximity switch 5 is not triggered, the motor 6 is de-energized, and the scraper 8 remains stationary.

[0053] When the gas production in the coke oven increases or the pressure in the gas collecting pipe rises to the set upper limit due to fouling, the thrust F1 (F1 = pressure × effective area of ​​the baffle plate) generated by the gas on the baffle plate 35 is greater than the compressive force F2 (F2 = spring elastic coefficient × compression) of the spring (34). After the balance is broken, the baffle plate 35 overcomes the spring force, drives the slide rod 33 to slide to the right and compress the spring 34. When the tail end face of the slide rod 33 enters the sensing range of the proximity switch 5, the proximity switch 5 outputs an electrical signal to trigger the relay, thereby starting the motor 6.

[0054] When the pressure inside the gas collection pipe drops to the set lower limit due to cleaning operations or working condition adjustments, the gas thrust F1 decreases, the potential energy stored in the spring 34 due to elastic deformation is released, pushing the baffle 35 to the left to reset, and the slide bar 33 then exits the sensing range of the proximity switch 5. The proximity switch 5 signal is disconnected, the motor 6 is de-energized, the scraper 8 stops rotating, and the system returns to its initial state.

[0055] After the motor 6 starts, it drives the connecting rod 7 and the scraper 8 to rotate around the central axis of the air collecting pipe via the rotating shaft. A sliding gap of 0.5-1mm is reserved between the end of the scraper 8 and the inner wall of the air collecting pipe 1. This ensures that the scraper fits tightly against the inner wall, effectively scraping off the attached tar, dust and other impurities, while also preventing jamming caused by too small a gap.

[0056] The electric heating wire 9 embedded inside the scraper 8 is simultaneously powered on when the motor 6 starts. The electric heating wire 9 is connected to an external temperature controller via wires to ensure that the temperature of the contact area is higher than the softening point of the tar. In this way, even in low-temperature environments, the tar will not solidify or harden, thereby improving the scraping efficiency of the scraper 8 in removing impurities.

[0057] The evenly distributed exhaust holes 36 at the tail end of the air duct 31 play an important role when the pressure inside the air collection pipe is too high. Some gas can be diverted through the exhaust holes 36 to avoid excessive pressure inside the air duct, prevent the wind baffle 35 from displacing excessively due to a sudden increase in pressure, effectively protect the spring 34 and the proximity switch 5, and ensure the stable operation of the pressure sensing triggering system.

[0058] During the scraping process of the scraper 8, the scraped-off impurities slide down the inner wall of the gas collecting pipe 1 to the bottom collection trough 10. The sealing ring set at the edge of the collection trough 10 effectively prevents gas leakage. The bottom of the collection trough 10 is connected to a detachable drawer plate 11 through a dovetail guide rail or a T-shaped slide. The operator can periodically pull the drawer plate 11 to remove and empty the solidified waste in the collection trough 10. After cleaning, the drawer plate 11 is reinserted, and the sealing ring automatically seals the trough opening, realizing convenient collection and cleaning of waste and ensuring the cleanliness and normal operation of the inside of the gas collecting pipe 1.

[0059] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A clean coke oven gas collecting pipe, comprising a gas collecting pipe (1), wherein a mounting frame (2) is provided inside the gas collecting pipe (1), and a mounting box (4) is provided at one end of the mounting frame (2) near the gas outlet of the gas collecting pipe (1), wherein a motor (6) is provided on the outer wall of the mounting box (4), and a rotating shaft is coaxially provided on the output shaft of the motor (6), and multiple connecting rods (7) are evenly distributed on the outer circumference of the rotating shaft, wherein each connecting rod (7) is provided with a scraper (8) at its end, and the ends of the scrapers (8) slide against the inner wall of the gas collecting pipe (1), characterized in that, The mounting frame (2) has a duct assembly (3) at one end near the air inlet of the air collection pipe (1). The duct assembly (3) includes a duct pipe (31). A slide rod (33) is slidably inserted at the end of the duct pipe (31). The slide rod (33) slides through the mounting frame (2) and the duct pipe (31) and extends into the interior of the mounting box (4). A baffle plate (35) is coaxially provided at the end of the slide rod (33) away from the mounting box (4). A proximity switch (5) is provided on the inner wall of the mounting box (4). The proximity switch (5) is coaxially arranged with the slide rod (33).

2. The clean coke oven gas collecting pipe according to claim 1, characterized in that, The air duct (31) has an outwardly opening flared mouth (32) at its open end.

3. The clean coke oven gas collecting pipe according to claim 1, characterized in that, The tail end of the air duct (31) is provided with multiple exhaust holes (36) for air circulation.

4. A clean coke oven gas collecting pipe according to claim 1, characterized in that, Each scraper (8) is equipped with an electric heating wire (9).

5. A clean coke oven gas collecting pipe according to claim 1, characterized in that, The bottom of the gas collecting pipe (1) is provided with a collection trough (10) for collecting waste.

6. A clean coke oven gas collecting pipe according to claim 5, characterized in that, A removable drawer plate (11) is slidably inserted into the bottom of the collection trough (10).

7. A clean coke oven gas collecting pipe according to claim 1, characterized in that, A spring (34) is fitted on the slide rod (33) near the inner wall of the end of the air duct (31) and the wind baffle (35).

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