Sand remover capable of adjusting ventilation quantity

Abstract

The invention provides a sand remover capable of adjusting ventilation quantity. The sand remover comprises a shell; the sand removal mechanism comprises sand removal assemblies and a sand collection box, the sand removal assemblies divide the interior of the shell into a sand collection channel and an exhaust channel, each sand removal assembly comprises an air guide part and a rotating shaft, any air guide part comprises a movable blade, a sand removal channel is formed between every two adjacent air guide parts, and sand dust enters the sand collection box through the sand collection channels and is discharged from the rotating shaft; the gas subjected to sand removal enters the exhaust channel from the sand removal channel and then is exhausted; and the adjusting mechanism is connected to the sand removal assembly and drives the movable blades on the same air guide piece to be opened and closed relatively so as to adjust the ventilation quantity of the sand removal channel. According to the sand remover capable of adjusting the ventilation quantity, the ventilation quantity of the sand remover can be flexibly adjusted through the sand removing assembly, and therefore the sand remover can flexibly work according to actual use requirements. Compared with a conventional sand removing technology at the present stage, the sand remover has the remarkable advantages of being flexible to use, high in controllability, wide in application range, stable in sand removing effect and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of sand removal equipment, in particular to a sand remover with adjustable ventilation volume. Background Art

[0002] In the current field of environmental purification technology, inertial sand removers are widely used as an effective air cleaning device in various occasions that require high air quality control. The core working principle of this device is to use the difference in inertia between the particles in the airflow and the airflow, and separate the dust and other particulate matter by inertia when the airflow turns through the curved channel. However, the existing inertial sand removers have certain limitations in structural design, especially when dealing with air with high concentration of dust, their performance is not ideal.

[0003] Specifically, the existing inertial sand remover has a fixed curved channel. This design can maintain a certain sand removal efficiency in an environment with low dust concentration. However, when encountering extreme weather conditions such as sandstorms, or in certain industrial environments, the dust concentration in the air will increase sharply. At this time, the fixed-size curved channel cannot meet the needs of efficient sand removal. Since the size and shape of the channel cannot be adjusted, high-concentration dust particles can easily break through the existing sand removal mechanism when passing through, resulting in some dust not being effectively separated and continuing to exist in the airflow.

[0004] This situation not only reduces the overall performance of the air purification system, but the unfiltered dust may cause wear and tear on other parts of the ventilation system, increasing maintenance costs and the risk of equipment failure. In addition, the design of the fixed curved channel also limits the applicability of the inertial sand remover under different environmental conditions, and it cannot make corresponding adjustments to changes in dust concentration, thus affecting its flexibility and effectiveness in practical applications. Summary of the invention

[0005] To this end, the technical problem to be solved by the present invention is to overcome the problem that the fixed sand removal channel in the prior art has great limitations in terms of applicable scenarios and sand removal effects, and to provide a sand remover with adjustable ventilation volume.

[0006] In order to solve the above technical problems, the present invention provides a sand remover with adjustable ventilation volume, which comprises: a shell, wherein an air inlet and an air outlet are respectively provided at two opposite ends of the shell; a sand removal mechanism, wherein the sand removal mechanism comprises at least two sand removal components and a sand collecting box, wherein the at least two sand removal components divide the interior of the shell into a sand collecting channel and an exhaust channel, wherein the sand collecting channel is arranged between the at least two sand removal components, wherein one end of the sand collection channel is connected to the air inlet, and the other end extends into the sand collecting box, wherein the exhaust channel is located between the sand removal component and the inner wall of the shell, and is connected to the exhaust port, and any of the sand removal components comprises a plurality of wind guides and a plurality of corresponding wind guides. A rotating shaft, wherein the multiple rotating shafts are respectively connected to the shell, and any of the air guide members includes at least two movable blades, which are respectively rotatably connected to the corresponding rotating shafts, and a sand removal channel is formed between two adjacent air guide members, and the sand collection channel and the exhaust channel are connected through multiple sand removal channels, and sand and dust enter the sand collection box from the sand collection channel, and the gas after sand removal enters the exhaust channel from the sand removal channel and is discharged; an adjusting mechanism, the adjusting mechanism is connected to the at least two sand removal components, and drives the at least two movable blades on the same air guide member to open and close relative to each other to adjust the ventilation volume of the sand removal channel.

[0007] In one embodiment of the present invention, the sand removal mechanism further comprises at least two sealing plates, which are respectively arranged between the air inlet ends of the at least two sand removal components and the inner wall of the shell, so that the gas to be sand removed enters the sand collection channel.

[0008] In one embodiment of the present invention, the adjustment mechanism includes a driver and a plurality of connecting rods, the driver is arranged on the housing, the plurality of connecting rods are respectively connected to the working ends of the driver, any of the connecting rods are provided with a plurality of rotating connecting parts, the plurality of rotating connecting parts are respectively connected to a plurality of movable blades to drive at least two movable blades on the same air guide member to open and close relative to each other.

[0009] In one embodiment of the present invention, an extension hole is provided on the shell, one end of the rotating connecting member is rotatably connected to the connecting rod, and the other end is passed through the extension hole through a connecting pin, and the movable blade is rotatably connected to the connecting pin and moves along the extension hole.

[0010] In one embodiment of the present invention, the sand removal assembly further includes a plurality of seals, and the plurality of seals are respectively coated on the intersections of the plurality of movable blades and the rotating connection member.

[0011] In one embodiment of the present invention, the sand removal mechanism further includes a sand removal fan, and the sand removal fan is connected to the sand collecting box.

[0012] In one embodiment of the present invention, the sand collecting box includes a box body, a fixed plate and at least two movable plates, the fixed plate is fixedly connected to the inner wall of the shell, the box body is connected to the fixed plate, at least two movable plates are respectively arranged on opposite sides of the box body, one end of any movable plate is abutted against at least one movable blade, and the other end is rotatably connected to the fixed plate.

[0013] In one embodiment of the present invention, the sand collecting box further comprises at least two elastic members, and the at least two elastic members are respectively connected between the at least two movable plates and the fixed plate, so that one end of the movable plate abuts against at least one of the movable blades.

[0014] In one embodiment of the present invention, the sand remover with adjustable ventilation volume further includes a dust concentration sensor, which is connected to the housing and located at the air inlet, and the dust concentration sensor is signal-connected to the regulating mechanism.

[0015] In one embodiment of the present invention, the sand removal mechanism includes multiple sand removal components and multiple adjustment mechanisms to form at least two sand collection channels, and a sealing plate is provided between the air inlet ends of two adjacent sand collection channels. The adjustment mechanism is respectively connected to one of the sand removal components, or to two adjacent sand removal components.

[0016] The above technical solution of the present invention has the following advantages compared with the prior art: The desander with adjustable ventilation volume described in the present invention realizes flexible adjustment of the ventilation volume of the desander through an adjustable desander component. When the dust content of the gas to be desandered is large, the desandering effect can be improved by reducing the flow rate of the desandering channel. When the dust content of the gas to be desandered is small, the ventilation volume of the desandering channel can be expanded, thereby reducing the wind resistance of the desandering channel without affecting the desandering efficiency of the desandering channel. In addition, during extreme sandstorms, the desandering device can completely close the desandering channel to prevent sand and dust from entering the ventilation system, so as to protect the internal structure of the desandering device and increase the service life of the device. Compared with the conventional desandering technology at this stage, the desandering device with adjustable ventilation volume has significant advantages such as flexible use, high controllability, wide application range and stable desandering effect, providing new ideas for the structural design and research and development of desandering equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0018] Figure 1 It is a structural schematic diagram of a sand removal mechanism in a sand remover with adjustable ventilation volume in a preferred embodiment of the present invention; Figure 2 yes Figure 1 The structural schematic diagram of the sand removal mechanism of the sand remover with adjustable ventilation volume when the ventilation volume is reduced; Figure 3 yes Figure 1 A schematic diagram of the front structure of the desander with adjustable ventilation volume from another perspective; Figure 4 yes Figure 1 A schematic diagram of the structure of the regulating mechanism in the desander with adjustable ventilation volume; Figure 5 yes Figure 4 The enlarged structural diagram at A in the middle; Figure 6 is a structural schematic diagram of a sand removal mechanism in a sand remover with adjustable ventilation volume in another embodiment of the present invention; Figure 7 yes Figure 6 The schematic diagram of the structure of the regulating mechanism in the desander with adjustable ventilation volume is shown.

[0019] Explanation of the reference numerals in the specification: 100, housing; 110, sand collecting channel; 120, exhaust channel; 130, extension hole; 200, sand removing mechanism; 210, sand removing assembly; 211, air guide; 2111, movable blade; 212, rotating shaft; 213, sand removing channel; 214, sealing member; 220, sealing plate; 230, sand collecting box; 231, box body; 232, fixed plate; 233, movable plate; 234, elastic member; 240, sand removing fan; 300, adjusting mechanism; 310, driver; 320, push rod; 330, connecting rod; 340, rotating connecting member. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Embodiment 1

[0021] See also Figure 1As shown, the present embodiment provides a sand remover with adjustable ventilation volume, which includes: a shell 100, wherein the two opposite ends of the shell 100 are respectively provided with an air inlet and an air outlet; a sand removal mechanism 200, wherein the sand removal mechanism 200 includes at least two sand removal components 210 and a sand collecting box 230, wherein the at least two sand removal components 210 divide the interior of the shell 100 into a sand collecting channel 110 and an exhaust channel 120, wherein the sand collecting channel 110 is arranged between the at least two sand removal components 210, wherein one end of the sand collection channel 110 is connected to the air inlet, and the other end extends into the sand collecting box 230, wherein the exhaust channel 120 is located between the sand removal component 210 and the inner wall of the shell 100, and is connected to the air outlet, wherein any of the sand removal components 210 includes a plurality of wind guide members 211 and a plurality of rotating shafts 212 corresponding to each other, wherein the A plurality of rotating shafts 212 are respectively connected to the shell 100, and any of the air guide members 211 includes at least two movable blades 2111, which are respectively rotatably connected to the corresponding rotating shafts 212, and a sand removal channel 213 is formed between two adjacent air guide members 211. The sand collection channel 110 and the exhaust channel 120 are connected through a plurality of the sand removal channels 213, and sand and dust enter the sand collection box 230 from the sand collection channel 110, and the clean gas after sand removal enters the exhaust channel 120 from the sand removal channel 213 and is then discharged; an adjusting mechanism 300, the adjusting mechanism 300 is connected to the at least two sand removal components 210, and drives the at least two movable blades 2111 on the same air guide member 211 to open and close relative to each other to adjust the ventilation volume of the sand removal channel 213.

[0022] The desander with adjustable ventilation volume described in the present embodiment realizes flexible adjustment of the ventilation volume of the desander through the adjustable desander component 210. When the dust content of the gas to be desandered is large, the desandering effect can be improved by reducing the flow rate of the desandering channel 213. When the dust content of the gas to be desandered is small, the ventilation volume of the desandering channel 213 can be expanded, thereby reducing the wind resistance of the desandering channel 213 without affecting the desandering efficiency of the desandering channel 213. In addition, during extreme sandstorms, the desandering channel 213 can be completely closed to prevent sand and dust from entering the ventilation system, so as to protect the internal structure of the desandering device and increase the service life of the device. Compared with the conventional desandering technology at this stage, the desandering device with adjustable ventilation volume has significant advantages such as flexible use, high controllability, wide application range and stable desandering effect, and provides new ideas for the structural design and development of desandering equipment.

[0023] See also Figure 1 and Figure 2As shown, the shell 100 in this embodiment is used to provide a sand removal operation space, and at the same time provides an installation and connection platform for the sand removal mechanism 200 and the adjustment mechanism 300. The interior thereof is a hollow structure, and an air inlet and an air exhaust port connected to the outside are respectively provided at both ends in the length direction. In the actual operation process, the gas to be sanded containing sand and dust enters the shell 100 from the air inlet and contacts the sand removal mechanism 200. The clean gas after sand removal is discharged from the exhaust port, and the blocked sand and dust are collected by the sand removal mechanism 200, thereby realizing the sand removal process of the gas.

[0024] In this embodiment, the sand removal mechanism 200 includes two sand removal components 210 arranged at intervals along the width direction of the shell 100, and the two sand removal components 210 extend along the length direction of the shell 100 to increase the contact area between them and the gas to be sanded, thereby improving the sand removal effect. Further, both ends of any sand removal component 210 in the height direction are connected to the inside of the shell 100, thereby separating the inside of the shell 100 from the sand collection channel 110, and correspondingly, the space located inside the inner body and outside the sand removal component 210 is the exhaust channel 120. Among them, in order to ensure that the gas with sand and dust can stably enter the sand collection channel 110, and at the same time, the sand and dust will not be secondary mixed and polluted with the clean gas in the exhaust channel 120 due to the escape of airflow, the sand removal mechanism 200 in this embodiment also includes at least two sealing plates 220, and the at least two sealing plates 220 are respectively arranged between the air inlet end of the at least two sand removal components 210 and the inner wall of the shell 100, so that the gas to be sanded enters the sand collection channel 110.

[0025] Furthermore, in any sand removal component 210, multiple air guides 211 are arranged to form multiple sand removal channels 213. When the gas with sand and dust moves in the sand collection channel 110, the sand and dust will be stopped by the multiple air guides 211, thereby being retained in the sand collection channel 110 and entering the sand collection box 230 under the action of directional wind force. The clean gas after sand removal will enter the exhaust channel 120 through the multiple sand removal channels 213, and finally leave the shell 100 through the exhaust port, thereby completing a complete sand removal process. During this process, the operator can adjust the opening degree of the sand removal channel 213 according to the actual sand removal air volume or sand concentration to be removed, thereby realizing the regulation of the overall internal flow of the sand remover. Specifically, the sand removal mechanism 200 also includes a sand removal fan 240, and the sand removal wind is connected to the sand collection box 230, thereby realizing the recovery and removal of the sand and dust inside the sand collection box 230, thereby ensuring that the sand remover with adjustable ventilation volume can operate stably for a long time.

[0026] In different embodiments, the sand remover with adjustable ventilation volume may further include a dust concentration sensor, which is connected to the housing 100 and located at the air inlet. The dust concentration sensor is signal-connected to the regulating mechanism 300, thereby realizing automatic detection of the dust concentration in the gas to be removed, thereby further improving processing efficiency and quality.

[0027] In this embodiment, any sand removal component 210 includes a plurality of air guides 211 evenly spaced along the length direction of the housing 100, and any air guide 211 is provided with two movable blades 2111 connected in a "V" shape, which can effectively stop sand and dust through the movable blades 2111, and the rotating shaft 212 is provided at the connection between the two movable blades 2111. Further, in this embodiment, the two movable blades 2111 on any air guide 211 are respectively connected to the adjustment mechanism 300, so that the relative opening and closing effect of the movable blades 2111 is achieved through the synchronous driving of the adjustment mechanism 300 on the movable blades 2111.

[0028] Furthermore, based on the rotatable structure of the movable blade 2111 in the present embodiment, during the sand removal process, there may be a movable gap between the movable blade 2111 and the sand collecting box 230, thereby posing a risk of sand and dust entering the exhaust channel 120 through the above-mentioned movable gap. Therefore, the structure of the sand collecting box 230 in the present embodiment is improved, specifically: the sand collecting box 230 includes a box body 231, a fixed plate 232 and at least two movable plates 233, the fixed plate 232 is fixedly connected to the inner wall of the shell 100, the box body 231 is connected to the fixed plate 232, at least two of the movable plates 233 are respectively arranged on opposite sides of the box body 231, one end of any of the movable plates 233 is in contact with at least one of the movable blades 2111, and the other end is rotatably connected to the fixed plate 232. Furthermore, the sand collecting box 230 in this embodiment further includes at least two elastic members 234, and at least two of the elastic members 234 are respectively connected between the at least two movable plates 233 and the fixed plate 232, so that the movable plate 233 and at least one movable blade 2111 abut against each other. The elastic member 234 is preferably a compression spring, which can apply a stable thrust to the movable plate 233, thereby ensuring that the movable plate 233 and the movable blade 2111 can always be in close contact, fundamentally avoiding the generation of a movable gap.

[0029] See also Figure 3 and Figure 4As shown, in this embodiment, the adjustment mechanism 300 includes a driver 310 and a plurality of connecting rods 330. The driver 310 is arranged on the housing 100. The plurality of connecting rods 330 are respectively connected to the working end of the driver 310 through the push rods 320. A plurality of rotating connecting members 340 are provided on any of the connecting rods 330. The plurality of rotating connecting members 340 are respectively connected to the plurality of movable blades 2111 to drive at least two movable blades 2111 on the same air guide 211 to move relatively open and close. Specifically, in this embodiment, four connecting rods 330 are provided corresponding to two sand removal assemblies 210. The four connecting rods 330 are arranged in parallel and spaced apart, and are correspondingly provided on both sides of the sand removal assemblies 210 to drive the two movable blades 2111 in any of the sand removal assemblies 210.

[0030] Specifically, the driver 310 in this embodiment is preferably a linear motor, and the connecting rod 330 is used to transmit the linear driving action of the driver 310 to the rotating connecting member 340. After that, the rotating connecting member 340 can convert the linear driving action of the connecting rod 330 into a rotational drive, thereby driving the movable blades 2111 to rotate. In this embodiment, the two movable blades 2111 on the same air guide 211 can rotate in opposite directions at the same time, thereby realizing the relative opening and closing process.

[0031] Furthermore, one end of the rotating connector 340 is rotatably connected to the connecting rod 330, and the other end is inserted into the extension hole 130 through a connecting pin, and the movable blade 2111 is rotatably connected to the connecting pin and moves along the extension hole 130 to achieve the purpose of adjusting the ventilation volume of the sand removal channel. Among them, the rotating connector 340 is used to convert the direction of the force, and the extension hole 130 can guide the rotation direction of the movable blade 2111. Furthermore, the sand removal component 210 also includes a plurality of seals 214, and the plurality of seals 214 are respectively coated at the intersection of the plurality of movable blades 2111 and the rotating connector 340, which can fill the extension hole 130 during the movement of the movable blade 2111, thereby forming a double sealing effect on the contact gap between the movable blade 2111 and the adjustment mechanism 300. Embodiment 2

[0032] join Figure 5 and Figure 6As shown, the present embodiment provides another desander with adjustable ventilation volume, and its actual operating principle and basic structure are the same as those of the first embodiment, and no further details are given here. In the present embodiment, in order to improve the adaptability of the desander, the desander mechanism 200 includes a plurality of desander components 210 and a plurality of adjusting mechanisms 300 to form at least two of the sand collecting channels 110, and a desander of suitable width can be formed by the cooperation of a plurality of desander components 210 and a plurality of adjusting mechanisms 300, a sealing plate 220 is provided between the air inlet ends of two adjacent sand collecting channels 110, and the adjusting mechanisms 300 are respectively connected to one of the desander components 210, or to two adjacent sand collecting channels 210.

[0033] Specifically, the present embodiment includes four sand removal components 210, and the four sand removal components 210 form a serpentine bending structure connected end to end, wherein the sand removal components 210 located on both sides are connected to the shell 100 through the sealing plate 220 to form two sand collecting channels 110. Furthermore, the two sand collecting channels 110 in the present embodiment have a larger diameter on the side facing the air inlet, and in the direction of movement of the sand and dust, the sand collecting channels 110 gradually converge, thereby forming a directional transmission effect on the sand and dust.

[0034] The adjusting mechanisms 300 at the two ends are used to adjust the sand removal components 210 at the two ends, and the remaining adjusting mechanisms 300 are disposed between two adjacent sand removal components 210 in the middle to drive the two sand removal components 210 to rotate synchronously.

[0035] In summary, the sand remover with adjustable ventilation volume described in the present application realizes flexible adjustment of the ventilation volume of the sand remover through the adjustable sand removal component 210. When the dust content of the gas to be sanded is large, the sand removal effect can be improved by reducing the flow rate of the sand removal channel 213. When the dust content of the gas to be sanded is small, the ventilation volume of the sand removal channel 213 can be expanded, thereby reducing the wind resistance of the sand removal channel 213 without affecting the sand removal efficiency of the sand removal channel 213. In addition, during extreme sandstorms, the sand removal channel 213 can be completely closed by the sand removal device, thereby preventing sand and dust from entering the ventilation system, so as to protect the internal structure of the sand remover and increase the service life of the device. Compared with the conventional sand removal technology at this stage, the sand remover with adjustable ventilation volume has significant advantages such as flexible use, high controllability, wide application range and stable sand removal effect, and provides new ideas for the structural design and research and development of sand removal equipment.

[0036] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A desander with adjustable ventilation volume, characterized in that: include: A shell, wherein two opposite ends of the shell are respectively provided with an air inlet and an air outlet; A sand removal mechanism, the sand removal mechanism comprises at least two sand removal components and a sand collecting box, the at least two sand removal components divide the interior of the shell into a sand collecting channel and an exhaust channel, the sand collecting channel is arranged between the at least two sand removal components, one end of the sand collecting channel is communicated with the air inlet, and the other end extends into the sand collecting box, the exhaust channel is located between the sand removal component and the inner wall of the shell, and is communicated with the exhaust port, any of the sand removal components comprises a plurality of wind guide members and a plurality of rotating shafts corresponding to each other, wherein the plurality of rotating shafts are respectively connected to the shell, any of the wind guide members comprises at least two movable blades, the at least two movable blades are respectively rotatably connected to the corresponding rotating shafts, a sand removal channel is formed between two adjacent wind guide members, the sand collection channel and the exhaust channel are communicated through a plurality of the sand removal channels, sand and dust enter the sand collecting box from the sand collection channel, and the gas after sand removal enters the exhaust channel from the sand removal channel and is discharged; The regulating mechanism is connected to the at least two sand removal components and drives the at least two movable blades on the same air guide member to open and close relative to each other so as to regulate the ventilation volume of the sand removal channel.

2. The desander with adjustable ventilation volume according to claim 1, characterized in that: The sand removal mechanism further comprises at least two sealing plates, which are respectively arranged between the air inlet ends of the at least two sand removal components and the inner wall of the shell, so that the gas to be sand removed enters the sand collection channel.

3. The desander with adjustable ventilation volume according to claim 1, characterized in that: The adjustment mechanism includes a driver and multiple connecting rods. The driver is arranged on the shell. The multiple connecting rods are respectively connected to the working ends of the driver. Any of the connecting rods is provided with multiple rotating connecting parts. The multiple rotating connecting parts are respectively connected to the multiple movable blades to drive at least two movable blades on the same air guide member to open and close relative to each other.

4. The desander with adjustable ventilation volume according to claim 3, characterized in that: An extension hole is provided on the shell, one end of the rotating connecting member is rotatably connected to the connecting rod, and the other end is inserted into the extension hole through a connecting pin shaft, and the movable blade is rotatably connected to the connecting pin shaft and moves along the extension hole.

5. The desander with adjustable ventilation volume according to claim 3, characterized in that: The sand removal assembly further comprises a plurality of seals, and the plurality of seals are respectively coated on the intersections of the plurality of movable blades and the rotating connecting member.

6. The desander with adjustable ventilation volume according to claim 1, characterized in that: The sand removal mechanism also includes a sand removal fan, and the sand removal fan is connected to the sand collecting box.

7. The desander with adjustable ventilation volume according to claim 1, characterized in that: The sand collecting box comprises a box body, a fixed plate and at least two movable plates, wherein the fixed plate is fixedly connected to the inner wall of the shell, the box body is connected to the fixed plate, and at least two movable plates are respectively arranged on opposite sides of the box body, one end of any movable plate is in contact with at least one movable blade, and the other end is rotatably connected to the fixed plate.

8. The desander with adjustable ventilation volume according to claim 7, characterized in that: The sand collecting box further comprises at least two elastic members, and the at least two elastic members are respectively connected between the at least two movable plates and the fixed plate, so that one end of the movable plate abuts against at least one movable blade.

9. The desander with adjustable ventilation volume according to claim 1, characterized in that: The sand remover with adjustable ventilation volume also includes a dust concentration sensor, which is connected to the shell and located at the air inlet. The dust concentration sensor is connected to the regulating mechanism signal.

10. The desander with adjustable ventilation volume according to claim 1, characterized in that: The sand removal mechanism includes multiple sand removal components and multiple adjustment mechanisms to form at least two sand collection channels. A sealing plate is provided between the air inlet ends of two adjacent sand collection channels. The adjustment mechanism is respectively connected to one of the sand removal components, or to two adjacent sand removal components.

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