Boiler pressure vessel with drainage treatment device

Abstract

The invention relates to the technical field of drainage treatment, and discloses a boiler pressure vessel with a drainage treatment device. Wherein the outer wall of the separating tower is provided with a connecting pipe, and one end, far away from the separating tower, of the connecting pipe is communicated with the drainage position of the boiler pressure container; and the separation assembly penetrates through the separation tower. According to the waste heat recovery device, through the arranged waste heat recovery assembly, under cooperative operation of the separation assembly, the upward flowing speed of hot air can be remarkably increased, after gas-liquid separation of the separation assembly is completed, generated hot air enters the action area of the waste heat recovery assembly, and at the moment, the waste heat recovery assembly can be recycled through the optimized structure and function design of the waste heat recovery assembly; according to the waste heat recovery device, hot air is promoted to quickly and orderly flow upwards, the hot air is in efficient contact with the heat absorption plate in the flowing process, heat is quickly absorbed by the heat absorption plate, through a series of coherent and efficient operations, the purpose of waste heat recovery is successfully achieved, and the energy utilization efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage treatment, and specifically to a boiler pressure vessel with a drainage treatment device. Background Art

[0002] In the field of industrial production, boiler pressure vessels, as core equipment, are widely used in many industries such as chemical engineering, electric power, and food processing. Their main function is to convert the chemical energy of fuel into heat energy through processes such as heating and evaporation, providing the required steam or hot water for the production process. However, during the operation of boiler pressure vessels, the drainage problem has always been a key factor affecting equipment performance, production efficiency, and environmental protection.

[0003] Traditional drainage treatment methods for boiler pressure vessels have many drawbacks. On the one hand, the drained water often contains a large amount of impurities, such as scale, rust, sediment, and various chemical substances. If these impurities are directly discharged without effective treatment, they will not only cause serious corrosion and blockage of the drainage pipes, shortening the service life of the pipes and increasing maintenance costs, but also pollute the surrounding water environment and damage the ecological balance. For example, in the chemical industry, boiler drainage may contain heavy metal ions and organic pollutants, which will poison aquatic organisms and affect the stability of the water ecosystem once they enter the water body. On the other hand, the water discharged from boiler pressure vessels usually has a relatively high temperature. Directly discharging high-temperature water not only wastes a large amount of heat energy resources, but also may affect the water temperature of the receiving water body, causing changes in the living environment of aquatic organisms and leading to ecological problems. According to relevant research statistics, if the heat contained in the boiler drainage without waste heat recovery can be effectively utilized, it can save considerable energy costs for enterprises. In the current situation of increasingly tight energy, this energy waste phenomenon needs to be solved urgently. Therefore, it is very necessary to design a boiler pressure vessel with a drainage treatment device that has strong practicability. Summary of the Invention

[0004] The purpose of the present invention is to provide a boiler pressure vessel with a drainage treatment device to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A boiler pressure vessel with a drainage treatment device, comprising: A separation tower; Wherein, a connecting pipe is provided on the outer wall of the separation tower, and one end of the connecting pipe far from the separation tower is communicated with the drainage part of the boiler pressure vessel; A separation component, which is arranged through the separation tower; A waste heat recovery component, which is connected to the separation component; A filtering component, which is connected to the lower part of the waste heat recovery component.

[0006] According to the above technical solution, the bottom surface of the separation tower is provided with a drain pipe, and the outer wall at the upper end of the separation tower is provided with an exhaust pipe.

[0007] According to the above technical solution, the outer wall of the separation tower is provided with a detachable closing door, and legs are fixedly installed on the outer wall at the lower end of the separation tower. The detachable closing door facilitates the cleaning of the interior of the separation tower, and the installed legs can stably support the separation tower.

[0008] According to the above technical solution, the separation assembly includes: A motor, arranged on the top surface of the separation tower, and the output end of the motor penetrates the top surface of the separation tower and extends into the interior of the separation tower; A rotating shaft, the top end of which is fixedly installed with the output end of the motor; A separation plate, the top surface of which is provided with a separation groove, and a hollow column is fixedly installed on the top surface of the separation plate; A limiting rod, both ends of which are slidably arranged in the rectangular limiting grooves opened on the inner wall of the hollow column, and the top surface of the limiting rod is fixedly installed with the bottom end of the rotating shaft; An annular baffle plate, which is slidably arranged with the inner wall of the separation tower.

[0009] According to the above technical solution, a motor base is fixedly installed on the top surface of the motor, and the motor base is fixedly installed with the top surface of the separation tower through bolts. The installed motor base can stably install the motor and enable the motor to work stably.

[0010] According to the above technical solution, the waste heat recovery assembly includes: An annular wedge-shaped plate, which is slidably arranged in the annular groove opened on the inner wall of the separation tower, and the top surface of the annular wedge-shaped plate is in contact with the bottom surface of the separation plate. The top surface of the annular wedge-shaped plate is fixedly installed with the bottom surface of the annular baffle plate; Among them, the surfaces of the annular wedge-shaped plate and the separation plate in contact with each other are both inclined surfaces, and the top surface of the annular wedge-shaped plate is provided with drain holes; A first connecting spring, arranged in the annular groove, the top end of the first connecting spring is fixedly installed with the bottom surface of the annular wedge-shaped plate, and the bottom end of the first connecting spring is fixedly installed with the bottom of the inner wall of the annular groove; A second connecting spring, arranged in the hollow column, the top end of the second connecting spring is fixedly installed with the bottom surface of the limiting rod, and the bottom end of the second connecting spring is fixedly installed with the bottom of the inner wall of the hollow column; A heat absorption plate, movably sleeved on the outer wall of the rotating shaft, and the outer wall of the heat absorption plate is fixedly installed with the inner wall of the separation tower. The surface of the heat absorption plate is provided with through holes.

[0011] According to the above technical solution, the filtration assembly includes: The cover body is fixedly installed on the bottom surface of the annular wedge-shaped plate. Rectangular grooves and annular clamping grooves are respectively formed on the inner wall of the cover body, and the annular clamping groove is communicated with the rectangular groove; The filter cover is slidably arranged on the inner wall of the cover body. An arc-shaped clamping block is fixedly installed on the outer wall of the filter cover, and the arc-shaped clamping block is slidably arranged in the annular clamping groove.

[0012] According to the above technical solution, a diversion cover is arranged above the filter cover, and the outer wall of the diversion cover is fixedly installed on the inner wall of the cover body. By installing the diversion cover, water can flow better into the filter cover completely to realize the filtering work.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. In the present invention, through the arranged separation component, the function of stirring and separating high-temperature water can be exerted. When high-temperature water flows into a specific area, the separation component, relying on its unique structural design, performs a powerful stirring operation on the high-temperature water, prompting the gas and liquid in the high-temperature water to be quickly separated. In this process, the gas-liquid separation effect is remarkable, successfully separating the gas from the liquid and achieving the established goal of gas-liquid separation. And the high-temperature gas after gas-liquid separation creates favorable conditions for the subsequent waste heat recovery link, strongly assisting the efficient development of the waste heat recovery work.

[0014] 2. In the present invention, through the arranged waste heat recovery component, under the coordinated operation of the separation component, the upward flow rate of the hot gas can be significantly accelerated. When the separation component completes gas-liquid separation, the generated hot gas immediately enters the action area of the waste heat recovery component. At this time, the waste heat recovery component, relying on its optimized structural and functional design, prompts the hot gas to flow upward quickly and orderly. During the flow of the hot gas, it efficiently contacts the heat absorption plate, and the heat is quickly absorbed by the heat absorption plate. Through this series of coherent and efficient operations, the purpose of waste heat recovery is successfully achieved, effectively improving the energy utilization efficiency.

[0015] 3. In the present invention, the arranged filtering component provides a key guarantee for water quality purification. When water flows through this component, the internal filtering structure will perform a comprehensive and detailed filtering treatment on the water. Particularly, during the operation of the waste heat recovery component, through a clever mechanical linkage mechanism, the filter cover can be driven to perform reciprocating motion. This dynamic process enables the filter cover to have more sufficient contact with the water flow, greatly accelerating the filtering speed, effectively improving the filtering efficiency. At the same time, the reciprocating motion of the filter cover breaks the situation of impurity accumulation that is prone to occur in traditional static filtering, successfully avoiding the occurrence of blockage phenomena, and ensuring that the entire filtering process can operate continuously, stably and efficiently. Description of the Drawings

[0016] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the accompanying drawings: Figure 1 is a schematic perspective view of the overall three-dimensional structure of a boiler pressure vessel with a drainage treatment device according to the present invention; Figure 2 is a schematic exploded sectional view of a separation tower in a boiler pressure vessel with a drainage treatment device according to the present invention; Figure 3 is a boiler pressure vessel with a drainage treatment device according to the present invention Figure 2 and is a schematic enlarged view of part A therein; Figure 4 is a schematic partial sectional view of a separation assembly in a boiler pressure vessel with a drainage treatment device according to the present invention; Figure 5 is a schematic exploded view of a cover body and a filter cover in a boiler pressure vessel with a drainage treatment device according to the present invention; Figure 6 is a boiler pressure vessel with a drainage treatment device according to the present invention Figure 5 and is a schematic enlarged view of part B therein.

[0017] In the figure: 1, separation tower; 2, connecting pipe; 3, drain pipe; 4, exhaust pipe; 5, closing door; 6, support leg; 7, motor base; 8, separation assembly; 81, motor; 82, rotating shaft; 83, hollow column; 84, separation plate; 85, annular baffle; 86, separation groove; 87, limiting rod; 88, rectangular limiting groove; 9, waste heat recovery assembly; 91, annular wedge plate; 92, first connecting spring; 93, annular groove; 94, second connecting spring; 95, discharge hole; 96, heat absorption plate; 10, filtering assembly; 101, cover body; 102, filter cover; 103, flow guiding cover; 104, rectangular groove; 105, annular clamping groove; 106, arc-shaped clamping block. Detailed Embodiment

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment 1: Please refer to Figures 1-6 , the present invention provides a technical solution: a boiler pressure vessel with a drainage treatment device, including: Separation tower 1, the bottom surface of the separation tower 1 is provided with a drain pipe 3, and the outer wall at the upper end of the separation tower 1 is provided with an exhaust pipe 4. The outer wall of the separation tower 1 is provided with a detachable closed door 5, and the outer wall at the lower end of the separation tower 1 is fixedly installed with a leg 6. In the design of the separation tower 1, a detachable closed door 5 is equipped, which facilitates the cleaning work inside the separation tower 1. When internal cleaning and maintenance are required, the staff can easily remove the closed door 5 and enter the inside of the separation tower 1 to comprehensively clean the internal components and cavities, ensuring that the separation tower 1 is always in good operating condition. At the same time, legs 6 are installed at the bottom of the separation tower 1, which can provide stable and reliable support for the separation tower 1, enabling it to remain stable under various working conditions, effectively avoiding problems such as equipment shaking and displacement caused by unstable support, and ensuring the safety and reliability of the operation of the separation tower 1; Among them, the outer wall of the separation tower 1 is provided with a connecting pipe 2, and the end of the connecting pipe 2 far from the separation tower 1 is communicated with the drainage part of the boiler pressure vessel; Separation component 8, penetrating through the separation tower 1; Waste heat recovery component 9, connected to the separation component 8; Filter component 10, connected to the lower part of the waste heat recovery component 9.

[0020] The separation component 8 includes: Motor 81, arranged on the top surface of the separation tower 1, and the output end of the motor 81 penetrates the top surface of the separation tower 1 and extends into the inside of the separation tower 1; Rotating shaft 82, the top end of which is fixedly installed with the output end of the motor 81; Separation plate 84, the top surface of which is provided with a separation groove 86, and a hollow column 83 is fixedly installed on the top surface of the separation plate 84; Limit rod 87, both ends of which are slidably arranged in the rectangular limit groove 88 opened on the inner wall of the hollow column 83, and the top surface of the limit rod 87 is fixedly installed with the bottom end of the rotating shaft 82; Annular baffle 85, slidably arranged with the inner wall of the separation tower 1.

[0021] In the specific implementation process, by starting the motor 81, the rotating shaft 82 can be rotated. Under the rotation of the rotating shaft 82, the limit rod 87 can drive the hollow column 88 to rotate. Under the rotation of the hollow column 88, the separation plate 84 can be rotated, so that the high-temperature water can be separated, and the water is separated to the inner wall of the annular baffle 85 and flows down along the way, achieving the purpose of gas-liquid separation.

[0022] In this embodiment, a motor base 7 is fixedly installed on the top surface of the motor 81. The motor base 7 is fixedly installed on the top surface of the separation tower 1 through bolts. The motor base 7 is made of a sturdy and durable material, and its structural design fully considers the force conditions during the operation of the motor, and can provide a stable support for the motor 81. By accurately installing the motor 81 on the motor base 7, the two are closely combined, effectively reducing the vibration and displacement of the motor 81 during operation, ensuring that the motor can maintain a stable working state under various working conditions, and thus guaranteeing the efficient and reliable operation of the entire system.

[0023] Embodiment 2: On the basis of the above embodiment, the waste heat recovery component 9 includes: An annular wedge plate 91 is slidably arranged in an annular groove 93 formed in the inner wall of the separation tower 1, and the top surface of the annular wedge plate 91 is in contact with the bottom surface of the separation plate 84, and the top surface of the annular wedge plate 91 is fixedly installed with the bottom surface of the annular baffle 85; Wherein, the surfaces of the annular wedge plate 91 and the separation plate 84 in contact with each other are both inclined surfaces, and the top surface of the annular wedge plate 91 is provided with drain holes 95; A first connecting spring 92 is arranged in the annular groove 93. The top end of the first connecting spring 92 is fixedly installed with the bottom surface of the annular wedge plate 91, and the bottom end of the first connecting spring 92 is fixedly installed with the bottom of the inner wall of the annular groove 93; A second connecting spring 94 is arranged in the hollow column 83. The top end of the second connecting spring 94 is fixedly installed with the bottom surface of the limiting rod 87, and the bottom end of the second connecting spring 94 is fixedly installed with the bottom of the inner wall of the hollow column 83; A heat absorption plate 96 is movably sleeved on the outer wall of the rotating shaft 82, and the outer wall of the heat absorption plate 96 is fixedly installed with the inner wall of the separation tower 1. The surface of the heat absorption plate 96 is provided with through holes.

[0024] In the specific implementation process, since the surfaces of the separation plate 84 and the annular wedge plate 91 in contact with each other are inclined surfaces, and the annular wedge plate 91 is slidably arranged in the annular groove 93 formed in the inner wall of the separation tower 1, the separation plate 84 can be pressed against the annular wedge plate 91 during the rotation of the separation plate 84. The first connecting spring 92 and the second connecting spring 94 can realize the up and down reciprocating movement of the separation plate 86 and the annular wedge plate 91. Then, in cooperation with the rotation of the separation plate 86, the high-temperature gas can flow upward, pass through the heat absorption plate 96, undergo heat absorption and storage treatment, then pass through the through holes, and finally be discharged from the exhaust pipe 3.

[0025] Embodiment 3: On the basis of the above embodiment, the filtering component 10 includes: A cover body 101 is fixedly installed on the bottom surface of the annular wedge plate 91. The inner wall of the cover body 101 is respectively provided with a rectangular groove 104 and an annular clamping groove 105, and the annular clamping groove 105 is communicated with the rectangular groove 104; The filter cover 102 is slidably arranged on the inner wall of the cover body 101. An arc-shaped clamping block 106 is fixedly installed on the outer wall of the filter cover 102, and the arc-shaped clamping block 106 is slidably arranged in the annular clamping groove 105.

[0026] In the specific implementation process, the cover body 101 can move up and down reciprocally under the reciprocating motion of the annular wedge plate 91. Since the cover body 101 is connected to the filter cover 102 through the arc-shaped clamping block 106, the filter cover 102 also has a tendency to move up and down reciprocally, strengthening the filtering force and avoiding blockage at the same time. When the filter cover 102 needs to be disassembled, just rotate the filter cover 102 until the arc-shaped clamping block 106 rotates to the place where the rectangular groove 104 communicates with the annular clamping groove 105, and then take out the filter cover 102 downward.

[0027] In this embodiment, a flow guide cover 103 is arranged above the filter cover 102. The outer wall of the flow guide cover 103 is fixedly installed on the inner wall of the cover body 101. The installed flow guide cover 103 in the equipment plays a key role in water flow guidance by virtue of its curved surface shape and precise position layout. When the water flow passes through, the flow guide cover 103 can effectively plan the water flow path, use its guiding characteristics to concentrate and direct the water flow in a specific direction, ensure that the water flow can uniformly and completely flow into the filter cover 102 without omission. In this way, it creates favorable conditions for the filter cover 102 to fully exert its filtering function, ensures that the filtering work can be carried out efficiently and comprehensively, and thus makes the water quality purification process smoother and more stable.

[0028] Working principle: During the operation of the boiler pressure vessel with the drainage treatment device, the water flow in the boiler pressure vessel flows through the connecting pipe 2 and smoothly injects into the separation tower 1. At the same time, the motor 81 starts, and the power output by the motor 81 drives the rotating shaft 82 to start rotating. The rotation of the rotating shaft 82 drives the limit rod 87 to rotate together. The limit rod 87 is closely connected to the hollow column 88, thereby causing the hollow column 88 to rotate around its central axis. The rotation of the hollow column 88 causes the separation plate 84 fixed to it to rotate accordingly. The high-speed rotating separation plate 84 exerts a centrifugal force on the high-temperature water entering the separation tower 1. The high-temperature water is thrown to the inner wall of the annular baffle 85 under the centrifugal action and then flows down naturally along the inner wall of the annular baffle 85, thus achieving the preliminary effect of gas-liquid separation.

[0029] Here, the surfaces where the separation plate 84 and the annular wedge plate 91 are in contact with each other are of a carefully designed inclined surface structure, and the annular wedge plate 91 is slidably connected to the annular groove 93 formed in the inner wall of the separation tower 1. Based on this ingenious structural layout, when the separation plate 84 rotates continuously, its inclined surface will constantly press against the annular wedge plate 91. Under the elastic buffering and resetting effects of the first connecting spring 92 and the second connecting spring 94, the separation plate 86 and the annular wedge plate 91 can perform stable reciprocating up and down movements. At the same time, the separation plate 86 itself is also rotating along with the rotation of the rotating shaft 82, and this compound motion mode creates favorable conditions for the upward flow of the high-temperature gas in the separation tower 1. During the upward process of the high-temperature gas, it will pass through the heat absorption plate 96, and the heat absorption plate 96 can effectively absorb and store the heat carried by the high-temperature gas. Then, the gas after heat extraction passes through the through hole preset at the top of the separation tower 1 and finally is discharged from the exhaust pipe 3 of the device.

[0030] During the reciprocating up and down movement of the annular wedge plate 91, through a specific mechanical linkage structure, it can drive the cover body 101 to perform synchronous reciprocating up and down movements. Since the cover body 101 is firmly connected to the filter cover 102 by means of the arc-shaped clamping block 106, the filter cover 102 also has the tendency of reciprocating up and down movements. This dynamic filtration mode greatly enhances the filtration efficiency and effectively avoids the clogging problem that is prone to occur in traditional static filtration. The water that has been comprehensively filtered and purified finally flows out smoothly through the drain pipe 3, and the entire drainage treatment process is successfully completed.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A boiler pressure vessel with a drainage treatment device, characterized in that: Comprising: Separation tower (1); Wherein, a connecting pipe (2) is provided on the outer wall of the separation tower (1), and one end of the connecting pipe (2) away from the separation tower (1) is communicated with the drainage part of the boiler pressure vessel; Separation component (8), penetrating through the separation tower (1); Waste heat recovery component (9), connected to the separation component (8); Filter component (10), connected to the lower position of the waste heat recovery component (9).

2. A boiler pressure vessel with a drainage treatment device according to claim 1, characterized in that: A drain pipe (3) is provided on the bottom surface of the separation tower (1), and an exhaust pipe (4) is provided on the outer wall of the upper end of the separation tower (1).

3. A boiler pressure vessel with a drainage treatment device according to claim 2, characterized in that: A detachable closing door (5) is provided on the outer wall of the separation tower (1), and legs (6) are fixedly installed on the outer wall of the lower end of the separation tower (1).

4. A boiler pressure vessel with a drainage treatment device according to claim 3, characterized in that: The separation component (8) includes: Motor (81), arranged on the top surface of the separation tower (1), and the output end of the motor (81) penetrates through the top surface of the separation tower (1) and extends into the interior of the separation tower (1); Rotating shaft (82), the top end of which is fixedly installed with the output end of the motor (81); Separation plate (84), a separation groove (86) is provided on the top surface, and a hollow column (83) is fixedly installed on the top surface of the separation plate (84); Limit rod (87), both ends of which are slidably arranged in a rectangular limit groove (88) opened on the inner wall of the hollow column (83), and the top surface of the limit rod (87) is fixedly installed with the bottom end of the rotating shaft (82); Annular baffle (85), slidably arranged on the inner wall of the separation tower (1).

5. A boiler pressure vessel with a drainage treatment device according to claim 4, characterized in that: A motor base (7) is fixedly installed on the top surface of the motor (81), and the motor base (7) is fixedly installed on the top surface of the separation tower (1) through bolts.

6. A boiler pressure vessel with a drainage treatment device according to claim 5, characterized in that: The waste heat recovery component (9) includes: Annular wedge plate (91), slidably arranged in an annular groove (93) opened on the inner wall of the separation tower (1), and the top surface of the annular wedge plate (91) is in contact with the bottom surface of the separation plate (84), and the top surface of the annular wedge plate (91) is fixedly installed with the bottom surface of the annular baffle (85); Wherein, the surfaces of the annular wedge plate (91) and the separation plate (84) in contact with each other are both inclined surfaces, and drain holes (95) are provided on the top surface of the annular wedge plate (91); First connecting spring (92), arranged in the annular groove (93), the top end of the first connecting spring (92) is fixedly installed with the bottom surface of the annular wedge plate (91), and the bottom end of the first connecting spring (92) is fixedly installed with the bottom of the inner wall of the annular groove (93); Second connecting spring (94), arranged in the hollow column (83), the top end of the second connecting spring (94) is fixedly installed with the bottom surface of the limit rod (87), and the bottom end of the second connecting spring (94) is fixedly installed with the bottom of the inner wall of the hollow column (83); Heat absorption plate (96), movably sleeved on the outer wall of the rotating shaft (82), and the outer wall of the heat absorption plate (96) is fixedly installed with the inner wall of the separation tower (1), and through holes are provided on the surface of the heat absorption plate (96).

7. A boiler pressure vessel with a drainage treatment device according to claim 6, characterized in that: The filter component (10) includes: The cover body (101) is fixedly installed on the bottom surface of the annular wedge-shaped plate (91). Rectangular grooves (104) and annular clamping grooves (105) are respectively formed on the inner wall of the cover body (101), and the annular clamping groove (105) is communicated with the rectangular groove (104). The filter cover (102) is slidably arranged on the inner wall of the cover body (101). An arc-shaped clamping block (106) is fixedly installed on the outer wall of the filter cover (102), and the arc-shaped clamping block (106) is slidably arranged in the annular clamping groove (105).

8. A boiler pressure vessel with a drainage treatment device according to claim 7, characterized in that: A flow guide cover (103) is arranged above the filter cover (102), and the outer wall of the flow guide cover (103) is fixedly installed on the inner wall of the cover body (101).

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