Air filtering treatment system for refractory material processing workshop

Abstract

The present invention relates to the technical field of environmental protection filtration equipment, more particularly to an air filtration treatment system for a refractory material processing workshop, the air filtration treatment system comprises: a box shell, the interior of the box shell is divided into an upper chamber and a lower chamber through a box chamber partition plate, and the upper chamber and the lower chamber are communicated through a plurality of circulation ports formed in the box chamber partition plate; a cooling heat exchanger is installed in the upper cavity, an air inlet communicated with the upper cavity is formed in the upper portion of the side wall of the box shell, and the air inlet is connected with an air inlet fan; a dust removal filter for removing particulate matters is mounted in the lower cavity; an air outlet communicated with the lower cavity is formed in the lower portion of the side wall of the box shell, and an efficient activated carbon filter used for adsorbing and purifying cooled and dedusted air is installed in the air outlet in the air outflow direction. Through multi-stage cooperative treatment and targeted design, the comprehensive purification efficiency and operation economy of the system on the waste gas of the refractory material workshop are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of environmental filtration equipment technology, and more specifically, to an air filtration system for refractory material processing workshops. Background Technology

[0002] During the production and processing of industrial refractory materials, processes such as raw material crushing, mixing, molding, and high-temperature sintering generate large quantities of complex, high-temperature, dust-laden waste gas. This waste gas not only contains significant particulate matter pollution but also, due to the extensive use of organic binders such as phenolic resins and asphalt, contains large-molecule volatile organic compounds (VOCs) such as benzene compounds, phenols, and polycyclic aromatic hydrocarbons. It may also be accompanied by trace amounts of acidic gases and oil mist, causing serious pollution to the workshop working environment and the surrounding atmosphere.

[0003] Currently, common treatment systems for this type of waste gas typically include preliminary cooling, dust removal, and end-of-pipe adsorption units. However, in practical implementation, existing technical solutions still have the following drawbacks: the filter screens of current refractory material production filtration devices have small areas, require long filtration times, and the filtered impurities need to be manually cleaned, resulting in low filtration efficiency. Furthermore, the activated carbon filters, which are crucial for the end-of-pipe adsorption unit, mostly use general-purpose activated carbon, which has low adsorption capacity and poor selectivity for characteristic pollutants in refractory materials, making it difficult to achieve stable and efficient deep purification. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the present invention provides an air filtration system for a refractory material processing workshop, comprising: a housing, the interior of which is divided into an upper chamber and a lower chamber by a partition, the upper chamber and the lower chamber being connected by a plurality of flow ports provided on the partition; a cooling heat exchanger is installed in the upper chamber, and an air inlet communicating with the upper chamber is opened on the upper side wall of the housing, the air inlet being connected to an air intake fan; a dust filter for removing particulate matter is installed in the lower chamber; and an air outlet communicating with the lower chamber is opened on the lower side wall of the housing, and a high-efficiency activated carbon filter for adsorbing and purifying the cooled and dust-removed gas is installed in the air outlet along the air outflow direction.

[0006] Furthermore, there are two air outlets, which are positioned opposite each other on the lower side walls of the housing, and each air outlet is equipped with a high-efficiency activated carbon filter.

[0007] Furthermore, the high-efficiency activated carbon filter includes: a filter element cylinder threaded into the air outlet, one end of the filter element cylinder inserted into the lower chamber connected to an air inlet end cap with a flow equalization hole, and the other end of the filter element cylinder connected to an air outlet end cap with a precision interception mesh; the filling cavity formed between the filter element cylinder and the two end caps is filled with activated carbon filter media.

[0008] Furthermore, the activated carbon filter medium uses coal-based briquetted activated carbon with an iodine value of not less than 1000 mg / g and a carbon tetrachloride adsorption rate of not less than 60%, and the coal-based briquetted activated carbon particles are columnar particles with a diameter of 3-4 mm and a length of 4-8 mm.

[0009] Furthermore, the surface of the coal-based briquetted activated carbon is loaded with catalytically active components, which are one or a combination of phosphoric acid, phosphate, manganese oxide or copper oxide.

[0010] Furthermore, the cooling heat exchanger includes: multiple heat exchange straight tubes installed on the side wall of the upper chamber, with adjacent heat exchange straight tubes connected by heat exchange bends; the end of the heat exchange straight tube at the first end that extends outside the housing is connected to a cooling water inlet pump, and the end of the heat exchange straight tube at the last end that extends outside the housing is connected to a water collection tank; dust removal sleeves are slidably connected to each of the multiple heat exchange straight tubes, and the multiple dust removal sleeves are fixed to a sleeve seat plate; a short shaft is slidably connected in a strip groove on the upper surface of the sleeve seat plate; the short shaft is connected to one end of a rotating connecting rod, and the other end of the rotating connecting rod is connected to the output shaft of a servo motor installed on the top of the housing.

[0011] Furthermore, each of the multiple flow ports of the chamber partition is fixedly connected with a tapered flow pipe whose diameter increases sequentially from top to bottom; a protective guide plate is also provided in the upper chamber between the multiple tapered flow pipes and the cooling heat exchanger. The protective guide plate includes a first guide plate and a second guide plate connected together. The end of the first guide plate away from the second guide plate is fixed to the chamber partition, and the inclined surface of the first guide plate faces the air inlet; the horizontal height of the upper surface of the second guide plate gradually decreases from the side closer to the air inlet to the side farther away from the air inlet.

[0012] Furthermore, the side wall of the housing is provided with a drain outlet that communicates with the upper chamber. The drain outlet and the air inlet are respectively located on two opposite surfaces of the housing. One end of the horizontal drain pipe is fixed to the outer end of the drain outlet, and the other end of the horizontal drain pipe is fixedly connected to the upper end of the vertical drain pipe. The lower end of the vertical drain pipe is detachably and sealed to the water storage cylinder structure. The side wall of the vertical drain pipe is sealed and slidably connected to a sealing unit. The sealing unit is positioned above the water level indicator unit of the water storage cylinder structure. When the liquid level inside the water storage cylinder structure reaches a preset value, the water level indicator unit and the sealing unit cooperate to control the sealing unit to seal the connection between the horizontal drain pipe and the vertical drain pipe.

[0013] Furthermore, the water storage cylinder structure includes: a cylinder body that is detachably and sealed to the bottom of the drainage riser, a support body that is fixedly connected to the bottom surface of the cylinder body, a cylindrical plug that is slidably connected to the support body for sealing the bottom opening of the drainage riser, and the cylindrical plug being connected to a spring seat fixed to the support body through a sealing spring sleeved on the support body; the water level indication unit includes: a rectangular slide rod that is sealed and slidably mounted on the upper surface of the cylinder body, a floating ball that is fixedly connected to the bottom of the rectangular slide rod, and an indication reference block that is fixedly connected to the top of the rectangular slide rod.

[0014] Furthermore, the sealing unit includes: a sealing slide plate that is slidably fitted to the side wall of the drainage riser; the outer end groove of the sealing slide plate is slidably fitted to a fixed guide plate; a tension spring is fixed between the fixed guide plate and the inner side of the groove; the fixed guide plate is fixed to the side wall of the drainage riser; a longitudinal slide rod is slidably connected in the longitudinal sliding hole of the fixed guide plate; a top plate is fixed to the top of the longitudinal slide rod; a limiting block on the lower surface of the top plate is engaged with a limiting groove on the upper surface of the sealing slide plate; the top plate is connected to the side plate of the side wall of the fixed guide plate through a tension spring; the longitudinal slide rod is located directly above the schematic reference block.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: This invention discloses an air filtration system for refractory material processing workshops. Through multi-stage synergistic treatment and targeted design, it effectively improves the overall purification efficiency and operational economy of the system for high-temperature, high-dust, and high-organic-load waste gas in refractory material workshops. The invention employs a streamlined chamber layout for cooling, dust removal, and adsorption, with rational airflow organization, creating conditions for efficient operation of each unit. Specifically, the cooling heat exchanger is equipped with a dust removal structure to maintain heat exchange efficiency; the high-efficiency activated carbon filter uses a specific activated carbon medium optimized for typical macromolecular organic pollutants in refractory materials, and achieves synergistic adsorption and catalytic oxidation through loaded catalytic components, thereby significantly improving the purification depth and extending the filter element's service life. Furthermore, the dual-outlet design increases the processing air volume and ease of maintenance. The entire system of this invention has a compact structure and strong targeting, reducing operating and maintenance costs while ensuring purification effects.

[0016] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the air filtration system for a refractory material processing workshop according to the present invention. Figure One ; Figure 2 This is a schematic diagram of the air filtration system for a refractory material processing workshop according to the present invention.Figure Two ; Figure 3 This is a cross-sectional view of the air filtration system for a refractory material processing workshop according to the present invention. Figure One ; Figure 4 This is a cross-sectional view of the air filtration system for a refractory material processing workshop according to the present invention. Figure Two ; Figure 5 This is a partial schematic diagram of the air filtration system for a refractory material processing workshop according to the present invention; Figure 6 This is a partial cross-sectional view of the air filtration system for a refractory material processing workshop according to the present invention; Figure 7 This is a schematic diagram of the cooling heat exchanger of the present invention; Figure 8 This is a schematic diagram of the dust removal filter of the present invention; Figure 9 This is a cross-sectional view of the dust removal filter of the present invention; Figure 10 This is a schematic diagram of the compartment partition and the protective guide plate of the present invention. Figure One ; Figure 11 This is a schematic diagram of the compartment partition and the protective guide plate of the present invention. Figure Two . Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0020] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0021] The following is in conjunction with the appendix Figures 1-11 The present invention will be described in further detail below.

[0022] Example 1: like Figures 1-11As shown, an air filtration system for a refractory material processing workshop includes: a housing 1, internally divided into an upper chamber 3 and a lower chamber 4 by a partition 2, the upper chamber 3 and the lower chamber 4 being connected by multiple flow ports located on the partition 2; a cooling heat exchanger 5 is installed in the upper chamber 3; an air inlet 6 communicating with the upper chamber 3 is located on the upper side wall of the housing 1, and the air inlet 6 is connected to an air intake fan 7; a dust filter 8 for removing particulate matter is installed in the lower chamber 4; an air outlet 10 communicating with the lower chamber 4 is located on the lower side wall of the housing 1, and a high-efficiency activated carbon filter 11 for adsorbing and purifying the cooled and dust-removed gas is installed in the air outlet 10 along the airflow direction. There are two air outlets 10, which are positioned opposite each other on the lower side walls of the housing 1, and each air outlet 10 is equipped with a high-efficiency activated carbon filter 11.

[0023] The working principle and technical effect of the above solution are as follows: In the air filtration system for a refractory material processing workshop of the present invention, the intake fan 7 draws high-temperature, high-dust, and high-organic-load exhaust gas from the refractory material processing workshop into the upper chamber 3 of the housing 1 through the intake port 6. The intake port 6 is located above the side wall of the housing 1 and communicates with the upper chamber 3. The intake fan 7 provides power for the intake of exhaust gas, enabling the exhaust gas to smoothly enter the system for treatment. The exhaust gas entering the upper chamber 3 will exchange heat with the cooling heat exchanger 5 installed in the chamber. The function of the cooling heat exchanger 5 is to reduce the temperature of the exhaust gas, as high temperatures may affect the performance of subsequent treatment units. Cooling creates more favorable conditions for subsequent dust removal and adsorption purification. The upper chamber 3 and the lower chamber 4 are connected by multiple flow ports provided on the chamber partition 2. The cooled exhaust gas flows into the lower chamber 4 through these flow ports. After entering the lower chamber 4, the exhaust gas passes through the dust filter 8 installed in this chamber. The main function of the dust filter 8 is to remove particulate matter from the exhaust gas, further purifying it. The cooled and dust-removed exhaust gas flows out from the lower chamber 4 through the outlet 10. An air outlet 10 is located on the lower side wall of the housing 1, communicating with the lower chamber 4. A high-efficiency activated carbon filter 11 is installed inside the air outlet 10 along the airflow direction. The high-efficiency activated carbon filter 11 uses a specific activated carbon medium optimized for typical macromolecular organic pollutants in refractory materials, and achieves synergistic adsorption and catalytic oxidation through loaded catalytic components. When exhaust gas passes through the high-efficiency activated carbon filter 11, the organic pollutants are adsorbed by the activated carbon, while the catalytic components accelerate the oxidative decomposition of the organic pollutants, thus significantly improving the purification depth. There are two air outlets 10, positioned opposite each other on the lower side walls of the housing 1, and both air outlets 10 are equipped with high-efficiency activated carbon filters 11. This dual-outlet design increases the airflow volume of exhaust gas, allowing more exhaust gas to be treated simultaneously. Furthermore, the dual-outlet design provides more convenient maintenance, such as allowing for the replacement or maintenance of the high-efficiency activated carbon filters 11 in each outlet separately.

[0024] Example 2: like Figures 1-11As shown, the high-efficiency activated carbon filter 11 includes: a filter element cylinder threaded into the air outlet 10; one end of the filter element cylinder inserted into the lower chamber 4 is connected to an air inlet end cap with a flow equalization hole; the other end of the filter element cylinder is connected to an air outlet end cap with a precision interception mesh; the filling cavity formed between the filter element cylinder and the two end caps is filled with activated carbon filter media. The activated carbon filter media uses coal-based briquetted activated carbon with an iodine value of not less than 1000 mg / g and a carbon tetrachloride adsorption rate of not less than 60%, and the coal-based briquetted activated carbon particles are columnar particles with a diameter of 3-4 mm and a length of 4-8 mm. The surface of the coal-based briquetted activated carbon is loaded with catalytically active components, which are one or a combination of several of phosphoric acid, phosphate, manganese oxide, or copper oxide.

[0025] The working principle and technical effect of the above scheme are as follows: In the air filtration system for a refractory material processing workshop of the present invention, the exhaust gas after being filtered by the dust removal filter 8 in the lower chamber 4 enters the high-efficiency activated carbon filter 11 through the outlet 10. The outlet 10 is threadedly connected to the filter element cylinder of the high-efficiency activated carbon filter 11 to ensure the sealing and stability of the connection. The exhaust gas first enters the filter element cylinder through the inlet end cap with flow equalization holes. The flow equalization holes of the inlet end cap play a role in uniformly distributing the airflow, so that the exhaust gas can enter the filling cavity relatively evenly and fully contact the activated carbon filter medium. After the exhaust gas enters the filling cavity formed between the filter element cylinder and the two end caps, it comes into contact with the activated carbon filter medium filled in it. The activated carbon filter medium is coal-based briquetted activated carbon with an iodine value of not less than 1000 mg / g and a carbon tetrachloride adsorption rate of not less than 60%. This high-adsorption activated carbon can effectively adsorb organic pollutants in the exhaust gas. Its columnar particle morphology provides a large specific surface area, increasing the contact area with the exhaust gas, thereby improving the adsorption efficiency. The surface of coal-based briquetted activated carbon is loaded with catalytically active components, which are one or a combination of phosphoric acid, phosphates, manganese oxides, or copper oxides. When organic pollutants in the waste gas are adsorbed by the activated carbon, the catalytically active components accelerate the oxidative decomposition reaction of the organic pollutants. For example, under certain conditions, the catalytically active components can promote the reaction of organic pollutants with oxygen in the air, converting the organic pollutants into harmless substances, achieving a synergistic effect of adsorption and catalytic oxidation. The waste gas, after adsorption and catalytic oxidation treatment by the activated carbon filter media, is discharged from the high-efficiency activated carbon filter 11 through an outlet cap equipped with a precision intercepting mesh. The precision intercepting mesh further intercepts activated carbon particles or other impurities that may be carried out from the filling chamber, ensuring that the discharged gas meets purification requirements.

[0026] Example 3: like Figures 1-11As shown, the cooling heat exchanger 5 includes: multiple heat exchange straight pipes 501 installed on the side wall of the upper chamber 3, with adjacent heat exchange straight pipes 501 connected by heat exchange bends 502, the end of the heat exchange straight pipe 501 at the first end extending out of the housing 1 connected to a cooling water inlet pump, and the end of the heat exchange straight pipe 501 at the last end extending out of the housing 1 connected to a water collection tank; dust removal sleeves 503 are slidably connected to each of the multiple heat exchange straight pipes 501, and the multiple dust removal sleeves 503 are fixed to the sleeve seat plate 504, with a short shaft slidably connected in the strip groove on the upper surface of the sleeve seat plate 504, the short shaft being connected to one end of a rotating connecting rod 505, and the other end of the rotating connecting rod 505 being connected to the output shaft of a servo motor 506 installed on the top of the housing.

[0027] The working principle and technical effects of the above scheme are as follows: In an air filtration system for a refractory material processing workshop according to the present invention, a cooling heat exchanger 5 is installed in the upper chamber 3. It mainly consists of multiple heat exchange straight pipes 501 and heat exchange bends 502 connecting adjacent heat exchange straight pipes 501. The end of the heat exchange straight pipe 501 at the first end that extends out of the housing 1 is connected to a cooling water inlet pump. The cooling water inlet pump delivers cooling water to the heat exchange straight pipes 501. The cooling water flows in the channel formed by the multiple heat exchange straight pipes 501 and the heat exchange bends 502, and exchanges heat with the high-temperature exhaust gas in the upper chamber 3, thereby reducing the temperature of the exhaust gas. The end of the heat exchange straight pipe 501 at the end that extends out of the housing 1 is connected to a water collection tank for collecting the cooling water after heat exchange. Multiple heat exchange straight tubes 501 are slidably connected to dust removal sleeves 503, which are fixed to a sleeve base plate 504. A short shaft is slidably connected in a strip groove on the upper surface of the sleeve base plate 504. One end of the short shaft is connected to a rotating connecting rod 505, and the other end of the rotating connecting rod 505 is connected to the output shaft of a servo motor 506 mounted on the top of the housing. When the servo motor 506 rotates, its output shaft drives the rotating connecting rod 505 to rotate. Since the rotating connecting rod 505 is connected to the short shaft, the short shaft will rotate around the axis of the output shaft of the servo motor 506. At the same time, the short shaft slides at different positions in the strip groove on the upper surface of the sleeve base plate 504. This sliding causes the sleeve base plate 504 and the multiple dust removal sleeves 503 to perform a horizontal reciprocating sliding motion on the multiple heat exchange straight tubes 501. During the reciprocating sliding motion of the dust removal sleeves 503, impurities adhering to the heat exchange straight tubes 501 are scraped off. Because the exhaust gas may contain particulate matter and other impurities, these impurities can adhere to the surface of the heat exchange straight tube 501, affecting the heat exchange effect. The scraping action of the dust removal sleeve 503 keeps the surface of the heat exchange straight tube 501 clean, ensuring smooth heat exchange. Furthermore, during heat exchange in the heat exchange straight tube 501, if water vapor in the exhaust gas condenses, water droplets will form and adhere to the surface of the heat exchange straight tube 501. The reciprocating sliding of the dust removal sleeve 503 can scrape off these condensed water droplets, preventing water accumulation and thus avoiding impact on heat exchange efficiency.

[0028] In this invention, the reciprocating sliding motion of the dust removal sleeve 503 on the heat exchange straight tube 501 can promptly scrape away impurities adhering to the surface of the heat exchange straight tube 501, preventing impurities from accumulating on the surface of the heat exchange straight tube 501 to form a heat insulation layer, thereby maintaining the heat exchange effect of the heat exchange straight tube 501. For example, if particulate matter in the exhaust gas adheres to the surface of the heat exchange straight tube 501 for a long time, it will hinder heat transfer and reduce heat exchange efficiency. The scraping action of the dust removal sleeve 503 can prevent this from happening, ensuring the continuous and stable operation of the cooling heat exchanger 5.

[0029] Example 4: like Figures 1-11 As shown, tapered flow pipes 201 with increasing diameters from top to bottom are fixedly connected above multiple flow ports of the chamber partition 2. A shielding guide plate 12 is also installed in the upper chamber 3, located between the tapered flow pipes 201 and the cooling heat exchanger 5. The shielding guide plate 12 includes a first guide plate and a second guide plate connected together. The end of the first guide plate away from the second guide plate is fixed to the chamber partition 2, and the inclined surface of the first guide plate faces the air inlet 6. The horizontal height of the upper surface of the second guide plate gradually decreases from the side closer to the air inlet 6 to the side farther away from the air inlet 6. The coordinated arrangement of the tapered flow pipes 201 and the shielding guide plate 12 not only prevents water droplets generated by condensation from entering the subsequent dust filter 8 and high-efficiency activated carbon filter 11 through the flow ports, but also allows the gas to fully contact and exchange heat with the heat exchange straight pipe 501 and heat exchange bent pipe 502 in the upper chamber 3.

[0030] The working principle and technical effect of the above solution are as follows: In an air filtration system for a refractory material processing workshop according to the present invention, the intake fan 7 draws high-temperature, high-dust, and high-organic-load exhaust gas from the refractory material processing workshop into the upper chamber 3 through the intake port 6. At this time, the shielding guide plate 12 plays a role. The shielding guide plate 12 includes a first guide plate and a second guide plate connected together. The end of the first guide plate away from the second guide plate is fixed to the chamber partition 2, and the inclined surface of the first guide plate faces the intake port 6. When the exhaust gas enters the upper chamber 3, the inclined surface of the first guide plate guides the exhaust gas to change its flow direction, causing it to flow towards the cooling heat exchanger 5. The horizontal height of the upper surface of the second guide plate gradually decreases from the side closer to the intake port 6 to the side farther away from the intake port 6. This further guides the exhaust gas to diffuse throughout the entire upper chamber 3, allowing the exhaust gas to fully contact the heat exchange straight tube 501 and heat exchange bent tube 502 of the cooling heat exchanger 5, thereby achieving more efficient heat exchange. During the heat exchange process between the exhaust gas and the cooling heat exchanger 5, some water vapor may condense into water droplets. The shielding guide plate 12 shields the multiple conical flow pipes 201, guiding the water droplets from one side to the upper surface of the chamber partition 2, preventing them from falling into the multiple conical flow pipes 201. The shielding guide plate 12 ensures that the exhaust gas fully contacts the cooling heat exchanger 5 for heat exchange, while the conical flow pipes 201 prevent the condensed water droplets from entering the subsequent treatment unit after the exhaust gas has undergone heat exchange, while ensuring that the gas smoothly enters the lower chamber 4. The two work together to complete the reasonable flow and treatment process of the exhaust gas in the system.

[0031] In this invention, the shielding guide plate 12 allows the exhaust gas to be more evenly distributed within the upper chamber 3 and to fully contact the heat exchange straight tube 501 and heat exchange elbow 502 of the cooling heat exchanger 5. This increases the contact area and contact time between the exhaust gas and the cooling medium, thereby improving heat exchange efficiency and more effectively reducing the temperature of the exhaust gas. Without the shielding guide plate 12, the exhaust gas might flow directly from near the inlet 6 to the outlet, failing to fully contact the cooling heat exchanger 5, resulting in insufficient heat exchange. The tapered flow pipe 201 prevents water droplets generated by condensation from entering the subsequent dust filter 8 and high-efficiency activated carbon filter 11 through the outlet. If water droplets enter these filters, they may cause blockage and damage, affecting their filtration effect and service life. The blocking effect of the tapered flow pipe 201 ensures the normal operation of subsequent treatment units, reducing equipment failure and maintenance costs.

[0032] Example 5: like Figures 1-11As shown, the side wall of the housing 1 is provided with a drain outlet that communicates with the upper chamber 3. The drain outlet and the air inlet 6 are respectively located on two opposite surfaces of the housing 1. One end of the drain horizontal pipe 13 is fixed to the outer end of the drain outlet, and the other end of the drain horizontal pipe 13 is fixedly connected to the upper end of the drain vertical pipe 14. The lower end of the drain vertical pipe 14 is detachably and sealed to the water storage cylinder structure 15. The side wall of the drain vertical pipe 14 is sealed and slidably connected to the sealing unit 16. The sealing unit 16 is installed above the water level indicator unit 17 of the water storage cylinder structure 15. When the liquid level inside the water storage cylinder structure 15 reaches the preset value, the water level indicator unit 17 and the sealing unit 16 cooperate to control the sealing unit 16 to seal the connection between the drain horizontal pipe 13 and the drain vertical pipe 14. At this time, the drainage work can be stopped, making it easy to remove the water storage cylinder structure 15.

[0033] The working principle and technical effect of the above solution are as follows: In the air filtration system for a refractory material processing workshop of the present invention, when the cooling heat exchanger 5 cools the exhaust gas, the water vapor in the exhaust gas will condense into water droplets, which will accumulate at the bottom of the upper chamber 3. The side wall of the housing 1 is provided with a drain outlet communicating with the upper chamber 3. The condensate flows into the drain horizontal pipe 13 through the drain outlet. The other end of the drain horizontal pipe 13 is connected to the upper end of the drain vertical pipe 14. Under normal circumstances, the sealing unit 16 will not block the connection between the drain horizontal pipe 13 and the drain vertical pipe 14. The connection port is sealed, and the condensate flows from the horizontal drain pipe 13 into the vertical drain pipe 14, eventually entering the water storage tank structure 15 for collection. The water storage tank structure 15 is equipped with a water level indicator unit 17 to monitor the liquid level inside. When the liquid level inside the water storage tank structure 15 reaches a preset value, the water level indicator unit 17 cooperates with the sealing unit 16 to trigger the sealing unit 16 to slide on the side wall of the vertical drain pipe 14, sealing the connection port between the horizontal drain pipe 13 and the vertical drain pipe 14. At this point, the condensate can no longer flow from the horizontal drain pipe 13 into the vertical drain pipe 14, stopping the drainage process. After the sealing unit 16 completes the sealing of the connection between the horizontal drain pipe 13 and the vertical drain pipe 14, since the water storage cylinder structure 15 and the lower end of the vertical drain pipe 14 are detachably sealed, the water storage cylinder structure 15 can be easily removed to treat the condensate collected therein. After treatment, the water storage cylinder structure 15 is reinstalled back at the lower end of the vertical drain pipe 14 to continue the collection of condensate.

[0034] Example 6: like Figures 1-11As shown, the water storage cylinder structure 15 includes: a cylinder 1501 detachably and sealingly connected to the bottom of the drain riser 14; a support body 1502 fixedly connected to the bottom surface of the cylinder 1501; a cylindrical plug 1503 slidably connected to the support body 1502 for sealing the bottom opening of the drain riser 14; the cylindrical plug 1503 is connected to a spring seat 1505 fixed on the support body 1502 via a sealing spring 1504 sleeved on the support body 1502; the water level indication unit 17 includes: a rectangular slide rod 1701 sealed and slidably mounted on the upper surface of the cylinder 1501; a floating ball 1702 fixedly connected to the bottom of the rectangular slide rod 1701; and an indication reference block 1703 fixedly connected to the top of the rectangular slide rod 1701.

[0035] The working principle and technical effect of the above solution are as follows: In the air filtration system for a refractory material processing workshop of the present invention, the cylinder 1501 of the water storage cylinder structure 15 is detachably and sealed to the bottom of the drain vertical pipe 14. When the condensate in the upper chamber 3 flows into the drain vertical pipe 14 through the drain outlet and the drain horizontal pipe 13, it will exert downward pressure on the cylindrical plug 1503, thereby pressing the cylindrical plug 1503 to slide downward on the support body 1502 and compressing the sealing spring 1504. At this time, the cylindrical plug 1503 releases the seal on the bottom opening of the drain vertical pipe 14, and the condensate can flow smoothly into the cylinder 1501. The water storage cylinder structure 15 is equipped with a water level indication unit 17. The rectangular slide rod 1701 in the water level indication unit 17 is sealed and slidably mounted on the upper surface of the cylinder 1501. A floating ball 1702 is fixedly connected to its bottom and an indication reference block 1703 is fixedly connected to its top. As the liquid level in the cylinder 1501 rises, the floating ball 1702 will move upward due to buoyancy, which will drive the rectangular slide rod 1701 to slide upward, thereby causing the indication reference block 1703 to move upward. By observing the relative position of the indication reference block 1703 and the upper surface of the cylinder 1501, the water level in the cylinder 1501 can be intuitively understood. When the liquid level inside the cylinder 1501 reaches a preset value, the indication reference block 1703 of the water level indication unit 17 rises to a certain height and cooperates with the sealing unit 16 to control the sealing unit 16 to seal the connection between the drainage horizontal pipe 13 and the drainage vertical pipe 14. The water storage cylinder structure 15 in this invention can effectively collect condensate flowing in from the drain riser 14. Its detachable and sealed connection design facilitates disassembly and cleaning after the water storage cylinder structure 15 is filled with water. The water level indication unit 17, through the cooperation of the float ball 1702 and the indication reference block 1703, can intuitively reflect the water level in the cylinder 1501. The operator can quickly determine whether the water level in the cylinder 1501 has reached the preset value by observing the position of the indication reference block 1703, so as to take corresponding measures in time, such as controlling the sealing unit 16 to perform sealing operations. The cooperation between the water level indication unit 17 and the sealing unit 16 realizes the automated control of the drainage system. When the liquid level in the cylinder 1501 reaches the preset value, the sealing unit 16 can be automatically triggered to seal the connection between the drain horizontal pipe 13 and the drain vertical pipe 14. The water storage cylinder structure 15 and the water level indication unit 17 have relatively simple structures, mainly consisting of a cylinder body 1501, a support body 1502, a cylindrical plug 1503, a sealing spring 1504, a spring seat 1505, a rectangular sliding rod 1701, a floating ball 1702, and an indication reference block 1703. The simple structural design reduces manufacturing costs, while also improving the reliability and stability of the equipment, reducing the probability of failure, and facilitating maintenance and repair.

[0036] Example 7: like Figures 1-11As shown, the sealing unit 16 includes: a sealing slide plate 1601 that is slidably fitted to the side wall of the drainage riser 14; the outer end groove of the sealing slide plate 1601 is slidably fitted to the fixed guide plate 1602; a tension spring 1603 is fixedly connected between the fixed guide plate 1602 and the inner side of the groove; the fixed guide plate 1602 is fixed to the side wall of the drainage riser 14; a longitudinal slide rod 1604 is slidably connected in the longitudinal sliding hole of the fixed guide plate 1602; a top plate 1605 is fixedly connected to the top of the longitudinal slide rod 1604; a limiting block 1606 on the lower surface of the top plate 1605 is engaged with the limiting groove on the upper surface of the sealing slide plate 1601; the top plate 1605 is connected to the side plate of the side wall of the fixed guide plate 1602 through a tension spring 1607; the longitudinal slide rod 1604 is located directly above the schematic reference block 1703. Under normal drainage conditions, the limiting block 1606 on the lower surface of the top plate 1605 is engaged in the limiting groove on the upper surface of the sealing slide plate 1601. At this time, the sealing slide plate 1601 will not block the connection between the drainage horizontal pipe 13 and the drainage vertical pipe 14. When the liquid level in the cylinder 1501 reaches the preset value, the floating ball 1702 will move upward due to buoyancy, and drive the rectangular slide bar 1701 to slide upward, thereby causing the indicator reference block 1703 to move upward. When the indicator reference block 1703 moves to contact the bottom of the longitudinal slide bar 1604, as the indicator reference block 1703 continues to move upward, the indicator reference block 1703 presses against the longitudinal slide bar 1604. The rod 1604 slides upward, and the longitudinal slide rod 1604 drives the top plate 1605 to move upward and stretch the tension spring 1607. At this time, the upward movement of the top plate 1605 can drive the limiting block 1606 to disengage from the limiting groove on the upper surface of the sealing slide plate 1601. After the two are disengaged, the sealing slide plate 1601 can move towards the connection port of the drainage horizontal pipe 13 and the drainage vertical pipe 14 under the elastic force of the tension spring 1603 and perform sealing. The tension spring 1603 is large, and its elastic force is much greater than that of the sealing spring 1504, thereby ensuring the stability of the sealing unit 16 in sealing the connection port of the drainage horizontal pipe 13 and the drainage vertical pipe 14.

[0037] The working principle and technical effect of the above solution are as follows: In the air filtration system for a refractory material processing workshop of the present invention, under normal drainage conditions, the sealing plate 1601 in the sealing unit 16 is sealed and slidably fitted on the side wall of the drainage riser 14, and its outer end groove is slidably fitted with the fixed guide plate 1602 fixed on the side wall of the drainage riser 14. The tension spring 1603 fixed between the fixed guide plate 1602 and the inner side of the groove is in a certain pre-tightened state. Meanwhile, a longitudinal sliding rod 1604 is slidably connected in the longitudinal sliding hole of the fixed guide plate 1602. The limiting block 1606 on the lower surface of the top plate 1605, which is fixed to the top of the longitudinal sliding rod 1604, is engaged in the limiting groove on the upper surface of the sealing slide plate 1601. The top plate 1605 is connected to the side plate of the side wall of the fixed guide plate 1602 through the tension spring 1607. This engagement restricts the movement of the sealing slide plate 1601, so that the sealing slide plate 1601 will not block the connection between the drainage horizontal pipe 13 and the drainage vertical pipe 14. Condensate can flow smoothly from the drainage horizontal pipe 13 into the drainage vertical pipe 14 and then into the cylinder 1501 of the water storage cylinder structure 15. When the liquid level inside the cylinder 1501 reaches the preset value, the water level indication unit 17 starts to function. The floating ball 1702 in the water level indication unit 17 will move upward due to buoyancy. Since the floating ball 1702 is fixed to the bottom of the rectangular slide bar 1701, it will drive the rectangular slide bar 1701 to slide upward, thereby causing the indication reference block 1703 fixed to the top of the rectangular slide bar 1701 to move upward. When the reference block 1703 moves to contact the bottom of the longitudinal slide bar 1604, as the reference block 1703 continues to move upward, it will push the longitudinal slide bar 1604 upward. The upward movement of the longitudinal slide bar 1604 will drive the top plate 1605 to move upward. The upward movement of the top plate 1605 will stretch the tension spring 1607, and at the same time drive the limiting block 1606 to disengage from the limiting groove on the upper surface of the sealing slide plate 1601. When the limiting block 1606 disengages from the limiting groove on the upper surface of the sealing slide plate 1601, the sealing slide plate 1601 is no longer restricted. At this time, the elastic force of the tension spring 1603 is released. Since the elastic force of the tension spring 1603 is much greater than the elastic force of the sealing spring 1504, the sealing slide plate 1601 will move towards the connection port of the drainage horizontal pipe 13 and the drainage vertical pipe 14 under the action of the elastic force of the tension spring 1603, and finally seal the connection port, thereby stopping the drainage.This invention achieves automated control of the drainage process. Through the water level indicator unit 17, the liquid level inside the water storage cylinder structure 15 is monitored in real time. When the liquid level reaches a preset value, the sealing unit 16 is automatically triggered to seal the connection between the horizontal drainage pipe 13 and the vertical drainage pipe 14, eliminating the need for manual intervention. This improves the system's intelligence and operational efficiency, reducing labor costs and potential errors caused by human operation. The structural design of the sealing unit 16 ensures reliable sealing performance. The elastic force of the tension spring 1603 is much greater than that of the sealing spring 1504, ensuring that the sealing slide plate 1601 can quickly and stably seal the connection between the horizontal drainage pipe 13 and the vertical drainage pipe 14 when sealing is required. Simultaneously, the locking design of the limiting block 1606 and the limiting groove effectively restricts the movement of the sealing slide plate 1601 under normal drainage conditions, preventing accidental sealing.

[0038] Example 8: like Figures 1-11 As shown, the bottom of the housing 1 is connected to a dust discharge mechanism 9 that mates with the bottom of the dust filter 8. The dust filter 8 includes: a filter box 801 fixed to the lower surface of the chamber partition 2; a dust collection hopper 802 at the bottom of the filter box 801; a square dust collection pipe 803 fixed to the bottom of the dust collection hopper 802; and the bottom of the square dust collection pipe 803 connected to the dust discharge mechanism 9. Rectangular frames 804 are fixed inside the openings on both sides of the filter box 801. Rectangular filter screens 805 are slidably connected inside each of the two rectangular frames 804. The two rectangular filter screens 805 are connected to two movable supports 806 one by one. Two movable brackets 806 are rotatably connected to one end of two eccentric connecting rods 807. The other end of the two eccentric connecting rods 807 is rotatably connected to the eccentric column of two transmission wheels 808. Both transmission wheels 808 are rotatably connected to the side wall of the housing 1. The inner side of both transmission wheels 808 is meshed with the drive wheel 809. The drive wheel 809 is fixed to the inner end of the drive shaft. The middle part of the drive shaft is rotatably mounted on the side wall of the housing 1. The outer end of the drive shaft is connected to the drive motor 810 mounted on the outer wall of the housing 1. After the drive motor 810 starts, it can drive the drive wheel 809 to rotate. When the drive wheel 809 rotates, it synchronously engages the two transmission wheels 808 to rotate. When the two transmission wheels 808 rotate, they drive the two eccentric columns to rotate and circle. The two eccentric columns drive one end of the two eccentric connecting rods 807 to rotate and circle. The other end of the two eccentric connecting rods 807 drives the two rectangular filter screens 805 to slide within the two rectangular frames 804 through the two movable brackets 806, continuously changing the position of the two rectangular filter screens 805. When the filter surfaces on the four sides of the two rectangular filter screens 805 contact the four side walls of the rectangular frame 804, the rectangular frame 804 can also scrape off the impurities on the four side filter surfaces of the rectangular filter screens 805.

[0039] The working principle and technical effect of the above scheme are as follows: In the air filtration system for a refractory material processing workshop of the present invention, the housing 1 serves as the external support structure of the entire device, and a dust discharge mechanism 9 is connected to its bottom. This mechanism is configured to cooperate with the bottom of the dust filter 8 to discharge the filtered dust. The dust filter 8 is the core filtration component. When dust removal and filtration operations are required, the drive motor 810 installed on the outer wall of the housing 1 is started. After the drive motor 810 starts, its power is transmitted to the drive wheel 809 fixed at the inner end of the drive shaft through the drive shaft, causing the drive wheel 809 to start rotating. When the drive wheel 809 rotates, it meshes with the inner side of the two transmission wheels 808, which will synchronously drive the two transmission wheels 808 to rotate. When the transmission wheel 808 rotates, its eccentric column will rotate and circle. The eccentric column is rotatably connected to one end of the eccentric connecting rod 807, so the rotation and circle motion of the eccentric column will drive one end of the eccentric connecting rod 807 to perform the same rotation and circle motion. The other end of the eccentric connecting rod 807 is rotatably connected to the movable bracket 806, which is in turn connected to the rectangular filter screen 805. Therefore, the movement of the eccentric connecting rod 807 is transmitted to the rectangular filter screens 805 through the movable bracket 806, causing the two rectangular filter screens 805 to slide within the two rectangular frames 804. During this process, the positions of the two rectangular filter screens 805 are continuously changed. When the filter surfaces of the four sides of the two rectangular filter screens 805 contact the four side walls of the rectangular frame 804, the rectangular frame 804 scrapes off the impurities from the filter surfaces of the rectangular filter screens 805. The scraped-off impurities fall into the dust discharge mechanism 9 through the dust hopper 802 and the square dust collection pipe 803, and are finally discharged outside the housing 1. In this invention, the drive motor 810 drives a series of transmission components such as the drive wheel 809 and the transmission wheel 808, causing the rectangular filter screens 805 to slide continuously within the rectangular frame 804, increasing the contact area and contact time between the air and the filter screen, and improving the filtration efficiency. Meanwhile, the continuous change in the position of the filter screen allows each part of the filter screen to fully perform its filtering function, avoiding excessive clogging of local filter screens and thus ensuring the overall filtering effect. In addition, the rectangular frame 804 scrapes off impurities from the four sides of the rectangular filter screen 805, realizing automatic cleaning of the filter screen. During the filtration process, impurities on the filter screen can be removed in time without manual intervention, reducing the risk of filter screen clogging, extending the service life of the filter screen, and reducing maintenance costs.

[0040] Example 9: like ​ As shown, the inner sides of the two rectangular filter screens 805 are rotatably connected to the upper ends of the two traction rods 811, and the lower ends of the two traction rods 811 are rotatably connected to the traction seat 812. The traction seat 812 is movably connected to the unblocking frame 814 sliding in the square dust collection pipe 803 through the unblocking shaft 813.

[0041] The working principle and technical effects of the above scheme are as follows: In an air filtration system for a refractory material processing workshop according to the present invention, when two rectangular filter screens 805 slide, their movement will drive the traction rods 811 to move because they are rotatably connected to the upper ends of the two traction rods 811. Since the lower ends of the two traction rods 811 are rotatably connected to the traction seat 812, the movement of the traction rods 811 will be transmitted to the traction seat 812, causing the traction seat 812 to produce a corresponding displacement. The traction seat 812 is movably connected to a cleaning frame 814 sliding within a square dust collection pipe 803 via a cleaning shaft 813. The displacement of the traction seat 812 is transmitted to the cleaning frame 814 via the cleaning shaft 813, causing the cleaning frame 814 to slide within the square dust collection pipe 803. When the rectangular filter 805 slides within the rectangular frame 804 in a predetermined manner, it periodically drives the unclogging frame 814 to reciprocate within the square dust collection pipe 803. This also allows the unclogging shaft 813 to oscillate to a certain extent. In the entire dust removal and filtration system, the square dust collection pipe 803 is the channel for dust discharge. Over long-term use, dust may accumulate within the square dust collection pipe 803, causing blockages. The sliding motion of the unclogging frame 814 within the square dust collection pipe 803 can clear the accumulated dust, preventing excessive dust buildup. This solution cleverly links the movement of the rectangular filter 805 with the movement of the unclogging frame 814. Utilizing the power provided by the existing drive motor 810, it simultaneously enables the rectangular filter 805 to slide and automatically clean while also driving the unclogging frame 814 to clear the dust collection pipe. No additional power source is required, fully utilizing the system's energy and reducing equipment energy consumption and costs.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 simplifying the description, and are not intended to 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.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An air filtration and treatment system for refractory material processing workshops, characterized in that, include: The housing is internally divided into an upper chamber and a lower chamber by a partition, which connects the two chambers through multiple flow ports on the partition. A cooling heat exchanger is installed in the upper chamber, and an air inlet connected to the upper chamber is located on the upper side wall of the housing. The air inlet is connected to an air intake fan. A dust filter for removing particulate matter is installed in the lower chamber. An air outlet connected to the lower chamber is located on the lower side wall of the housing, and a high-efficiency activated carbon filter for adsorbing and purifying the cooled and dust-removed gas is installed in the air outlet along the airflow direction.

2. The air filtration and treatment system for a refractory material processing workshop according to claim 1, characterized in that, There are two air outlets, which are positioned opposite each other on the lower side walls of the housing. Each air outlet is equipped with a high-efficiency activated carbon filter.

3. The air filtration and treatment system for a refractory material processing workshop according to claim 1, characterized in that, The high-efficiency activated carbon filter includes: a filter cartridge body threaded into the air outlet; one end of the filter cartridge body inserted into the lower chamber is connected to an air inlet end cap with a flow equalization hole; the other end of the filter cartridge body is connected to an air outlet end cap with a precision interception mesh; the filling cavity formed between the filter cartridge body and the two end caps is filled with activated carbon filter media.

4. The air filtration and treatment system for a refractory material processing workshop according to claim 3, characterized in that, The activated carbon filter medium uses coal-based briquetted activated carbon with an iodine value of not less than 1000 mg / g and a carbon tetrachloride adsorption rate of not less than 60%, and the coal-based briquetted activated carbon particles are columnar particles with a diameter of 3-4 mm and a length of 4-8 mm.

5. The air filtration and treatment system for a refractory material processing workshop according to claim 4, characterized in that, The surface of coal-based briquetted activated carbon is loaded with catalytically active components, which are one or a combination of phosphoric acid, phosphate, manganese oxide or copper oxide.

6. The air filtration and treatment system for a refractory material processing workshop according to claim 1, characterized in that, The cooling heat exchanger includes: multiple heat exchange straight tubes installed on the side wall of the upper chamber, with adjacent heat exchange straight tubes connected by heat exchange bends; the end of the heat exchange straight tube at the first end that extends outside the housing is connected to a cooling water inlet pump, and the end of the heat exchange straight tube at the last end that extends outside the housing is connected to a water collection tank; dust removal sleeves are slidably connected to multiple heat exchange straight tubes, and multiple dust removal sleeves are fixed to sleeve base plates; a short shaft is slidably connected in a strip groove on the upper surface of the sleeve base plate, and the short shaft is connected to one end of a rotating connecting rod, and the other end of the rotating connecting rod is connected to the output shaft of a servo motor installed on the top of the housing.

7. The air filtration and treatment system for a refractory material processing workshop according to claim 1, characterized in that, Above each of the multiple flow ports of the chamber partition, a tapered flow pipe with an increasing diameter from top to bottom is fixedly connected; a protective guide plate is also installed in the upper chamber between the multiple tapered flow pipes and the cooling heat exchanger. The protective guide plate includes a first guide plate and a second guide plate connected together. The end of the first guide plate away from the second guide plate is fixed to the chamber partition, and the inclined surface of the first guide plate faces the air inlet; the horizontal height of the upper surface of the second guide plate gradually decreases from the side closer to the air inlet to the side farther away from the air inlet.

8. The air filtration and treatment system for a refractory material processing workshop according to claim 7, characterized in that, The side wall of the tank shell is provided with a drain outlet that communicates with the upper chamber. The drain outlet and the air inlet are respectively located on two opposite sides of the tank shell. One end of the horizontal drain pipe is fixed to the outer end of the drain outlet, and the other end of the horizontal drain pipe is fixedly connected to the upper end of the vertical drain pipe. The lower end of the vertical drain pipe is detachably and sealed to the water storage cylinder structure. The side wall of the vertical drain pipe is sealed and slidably connected to the sealing unit. The sealing unit is set above the water level indicator unit of the water storage cylinder structure. When the liquid level inside the water storage cylinder structure reaches the preset value, the water level indicator unit and the sealing unit cooperate to control the sealing unit to seal the connection between the horizontal drain pipe and the vertical drain pipe.

9. The air filtration and treatment system for a refractory material processing workshop according to claim 8, characterized in that, The water storage cylinder structure includes: a cylinder body that is detachably and sealed to the bottom of the drainage riser, a support body that is fixed to the bottom surface of the cylinder body, and a cylindrical plug that is slidably connected to the support body for sealing the bottom opening of the drainage riser. The cylindrical plug is connected to a spring seat fixed to the support body through a sealing spring sleeved on the support body. The water level indication unit includes: a rectangular slide rod that is sealed and slidably mounted on the upper surface of the cylinder body, a floating ball that is fixed to the bottom of the rectangular slide rod, and an indication reference block that is fixed to the top of the rectangular slide rod.

10. The air filtration and treatment system for a refractory material processing workshop according to claim 9, characterized in that, The sealing unit includes: a sealing slide plate that is slidably fitted to the side wall of the drainage riser; a groove at the outer end of the sealing slide plate that is slidably fitted to a fixed guide plate; a tension spring that is fixed between the fixed guide plate and the inner side of the groove; the fixed guide plate that is fixed to the side wall of the drainage riser; a longitudinal slide rod that is slidably connected in the longitudinal sliding hole of the fixed guide plate; a top plate that is fixed to the top of the longitudinal slide rod; a limiting block on the lower surface of the top plate that is engaged with a limiting groove on the upper surface of the sealing slide plate; and the top plate that is connected to the side plate of the side wall of the fixed guide plate through a tension spring; the longitudinal slide rod that is located directly above the schematic reference block.

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