Bottle cap detection device for chemical fertilizer filling bottle

Abstract

The utility model provides a bottle cap detection device for chemical fertilizer filling bottles, which relates to the technical field of bottle cap detection and comprises a first box body, four detection assemblies are arranged at the top of an inner cavity of the first box body, clamping assemblies are arranged in inner cavities of the four detection assemblies, and an air blowing assembly is arranged in an inner cavity of a second box body. According to the bottle cap detection device, a bottle cap is placed in the installation shell to be fixed, the four electric push rods are started, the electric push rods operate and drive the bottle cap to downwards reach the top of the detection pipe, the four motors are started, the motors operate and drive the bottle cap to slowly rotate on the surface of the bottle cap lines, and when the bottle cap inner lines are damaged, the bottle cap is fixed. When the motor drives the bottle caps to rotate, the blocking phenomenon occurs, the fan is started, the fan operates and blows air into the bottle caps in threaded connection with the bottle caps through the four detection pipes, and the bottle caps are all located in the water surface, so that whether bubbles are generated on the surfaces of the four bottle caps or not can be observed through the observation windows, and the sealing performance of the bottle caps is detected.

Description

Technical Field

[0001] The utility model relates to the technical field of bottle cap detection, in particular to a bottle cap detection device for fertilizer filling bottles. Background Art

[0002] Chemical fertilizers, referred to as chemical fertilizers, are fertilizers made by chemical and / or physical methods that contain one or more nutrients required for the growth of crops. They are also called inorganic fertilizers, including nitrogen fertilizers, phosphorus fertilizers, potassium fertilizers, micro-fertilizers, compound fertilizers, etc. They are not edible.

[0003] In the prior art, when fertilizer filling bottles are produced, corresponding testing equipment is required to test the bottle caps. The existing bottle cap testing device lacks the ability to test the inner lines of the bottle caps, so that the staff can only test the inner lines of the bottle caps by visual observation. Visual observation is prone to errors and the testing efficiency is low. Secondly, the existing bottle cap testing device lacks the ability to test the sealing of the bottle caps, so it is easy to produce fertilizer filling bottles with poor sealing effects, which causes the fertilizer to volatilize too quickly and affects the quality of fertilizer use.

[0004] Therefore, a bottle cap detection device for fertilizer filling bottles is proposed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a bottle cap detection device for fertilizer filling bottles, comprising: a box body one, a box body two is fixedly installed on the bottom of the box body one, four ends of the bottom of the box body two are installed with legs, a switch door is installed on the surface of the box body two through a hinge, a handle is installed on one side of the switch door surface, four detection components are arranged on the top of the inner cavity of the box body one, the inner cavities of the four detection components are all provided with clamping components, the inner cavity of the box body two is provided with a blowing component, and a filter box is installed on one end of the blowing component.

[0007] As a preferred embodiment, a control terminal is installed on the top of one side of the box body, an observation window is installed on the surface of one side of the box body, a drain pipe is installed on the bottom end of one side of the box body, a water inlet is installed on the other side of the box body, the drain pipe and the water inlet are communicated with the interior of the box body, and an operation port is opened on the surface of the box body.

[0008] As a preferred embodiment, the detection component includes an electric push rod, which is fixedly embedded in the top of the box body, one end of the electric push rod passes through the top of the box body and is installed with a device shell, the inner cavity of the device shell is fixedly installed with a motor, the output end of the motor is installed with a connecting rod, one end of the connecting rod passes through the surface of the device shell and is connected to the output end of the motor, and the other side of the connecting rod is installed with a mounting shell.

[0009] As a preferred embodiment, the clamping assembly includes a plurality of springs, and the plurality of springs are evenly divided into two groups, one ends of the two groups of springs are connected to both sides of the inner wall of the mounting shell, the other ends of the two groups of springs are installed with arc-shaped clamping plates, the surfaces of the two arc-shaped clamping plates are installed with anti-slip pads, one side of the two arc-shaped clamping plates is installed with a plurality of telescopic rods, one ends of the plurality of telescopic rods are installed on both sides of the inner wall of the mounting shell, and the plurality of telescopic rods are located on the inner side of the plurality of springs.

[0010] As a preferred embodiment, the blowing assembly includes a fan, which is fixedly installed at the bottom of the inner cavity of box body two, an air inlet pipe is installed on one side of the fan, the air inlet pipe passes through the inner wall of box body two and is connected to one side of the fan, and an air outlet pipe is installed on the other side of the fan, one end of the air outlet pipe is penetrated and installed with a water storage box, the water storage box is fixedly installed at the bottom of the inner cavity of box body two, the bottom of the water storage box passes through the bottom of box body two and is equipped with a drain outlet, one side of the water storage box is penetrated and connected with a connecting pipe, four detection tubes are penetrated and installed on the surface of the connecting pipe, the surfaces of the four detection tubes all pass through the bottom of box body two and are embedded in the bottom of the inner cavity of box body one, the tops of the four detection tubes are opened with bottle cap patterns, and the other end of the air inlet pipe is penetrated and connected to the bottom of the filter box.

[0011] As a preferred embodiment, the filter box is fixedly connected to one side of the box body, a movable door is installed on the surface of the filter box through a hinge, a handle is installed on the surface of the movable door, a filter plate is installed in the inner cavity of the filter box, and an air inlet pipe is connected to the top of the filter box.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, the electric push rod, the motor, the fan and the control terminal are electrically connected. When the bottle caps of the fertilizer filling bottles are tested, an appropriate amount of bottle caps are extracted for sampling and testing, and the fertilizer bottle caps to be tested are placed through the operation port so that the bottle caps are placed inside the installation shell, and in the process of placing, the two arc-shaped clamping plates are just clamped on the surface of the bottle caps, so as to fix and clamp the placement of the bottle caps. After placing four bottle caps in sequence, the four electric push rods are started through the control terminal, and the electric push rods operate and drive the fixedly clamped bottle caps to move downward. The staff can observe the falling position of the bottle caps through the observation window. When the clamped bottle caps just reach the top of the detection tube At this time, four motors are started through the control terminal, and the motors are operated and driven by the electric push rod to slowly rotate the clamped bottle cap on the surface of the bottle cap pattern. Since the inner pattern of the bottle cap coincides with the bottle cap pattern, when the inner pattern of the bottle cap is damaged, there will be a jamming phenomenon when the motor drives the bottle cap to rotate. The jamming phenomenon of the rotation of the bottle cap inside box one can be observed through the observation window. After discovery, the staff can reach into the interior of box one through the operation port and manually remove the bottle cap on the surface of the bottle cap pattern. By setting the detection component, the bottle cap and the bottle cap pattern are used in conjunction to detect the inner pattern of the fertilizer bottle cap, and the bottle cap with damaged inner pattern can be detected, and the detection efficiency is high.

[0014] 2. The utility model has a water inlet connected to an external water pipe, and a proper amount of water is added to the interior of the box body 1 so that the water level covers the top of the detection tube. The fan can be started through the control terminal, and the fan operates to blow wind into the water storage box through the air outlet pipe, and then the wind is blown into the bottle caps connected to the bottle cap grooves through the four detection tubes through the connecting pipe. Since the four bottle caps are all located in the water surface, it is observed through the observation window whether there are bubbles on the surfaces of the four bottle caps. The bottle caps with bubbles indicate that the sealing is unqualified. When bubbles are generated, there may be cracks in the bottle caps. At this time, a small part of the added water will flow into the connecting pipe through the detection tube. At this time, the water will enter the water storage box. After the detection is completed, the sealing plug located on the surface of the drain port can be removed, so that the entered water can be discharged outwardly. The sealing of the bottle caps can be detected by arranging the blowing component, so as to detect the bottle caps with unqualified sealing, which can avoid the production of bottled fertilizers with poor sealing effect and improve the use quality of bottled fertilizers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front perspective structural diagram of a bottle cap detection device for a fertilizer filling bottle provided by the utility model;

[0016] Figure 2 A schematic diagram of the side view of the three-dimensional structure of the bottle cap detection device for fertilizer filling bottles provided by the utility model;

[0017] Figure 3This is a front split plan view of the bottle cap detection device for fertilizer filling bottles provided by the utility model;

[0018] Figure 4 This is a schematic diagram of the front split three-dimensional structure of the bottle cap detection device for fertilizer filling bottles provided by the utility model;

[0019] Figure 5 A schematic diagram of the three-dimensional structure of the front view detection component of the bottle cap detection device for fertilizer filling bottles provided by the utility model;

[0020] Figure 6 A schematic diagram of the three-dimensional structure of the upward-looking detection component of the bottle cap detection device for fertilizer filling bottles provided by the utility model;

[0021] Figure 7 This is an enlarged view of point A of the bottle cap detection device for fertilizer filling bottles provided by the utility model.

[0022] Legend:

[0023] 1. Box 1; 101. Control terminal; 102. Observation window; 103. Drain pipe; 104. Water inlet; 105. Operation port; 2. Box 2; 201. Support leg; 202. Open / close door; 203. Handle; 3. Detection component; 301. Electric push rod; 302. Device shell; 303. Motor; 304. Connecting rod; 305. Mounting shell; 4. Clamping component; 401. Spring; 402. Arc splint; 403. Anti-skid pad; 404. Telescopic rod; 5. Blowing component; 501. Fan; 502. Inlet pipe; 503. Air outlet pipe; 504. Water storage box; 505. Drain port; 506. Connecting pipe; 507. Detection tube; 508. Bottle cap pattern; 6. Filter box; 601. Movable door; 602. Handle; 603. Filter plate; 604. Inlet pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-7The utility model provides a technical solution: a bottle cap detection device for fertilizer filling bottles, comprising: a box body 1, a box body 2 2 is fixedly installed at the bottom of the box body 1, four ends of the bottom of the box body 2 2 are installed with legs 201, a switch door 202 is installed on the surface of the box body 2 through a hinge, a handle 203 is installed on one side of the surface of the switch door 202, four detection components 3 are arranged on the top of the inner cavity of the box body 1, the inner cavities of the four detection components 3 are all provided with clamping components 4, the inner cavity of the box body 2 2 is provided with a blowing component 5, and a filter box 6 is installed at one end of the blowing component 5.

[0026] Specifically: the four legs 201 are used to support the entire detection device. The switch door 202 can be opened by using the handle 203, which is convenient for inspecting and cleaning the interior of the box body 2. The fertilizer bottle cap can be fixed and clamped by using the clamping component 4, and then the fertilizer bottle cap can be moved downward for detection by using the four detection components 3. The bottle cap moving downward can be used in conjunction with the blowing component 5 to detect the airtightness of the bottle cap. The air can be filtered by installing the filter box 6, which is convenient for providing clean air when detecting the airtightness of the bottle cap.

[0027] In one embodiment, a control terminal 101 is installed on the top of one side of the box body 1, an observation window 102 is installed on the surface of one side of the box body 1, a drain pipe 103 is installed on the bottom end of one side of the box body 1, and a water inlet 104 is installed on the other side of the box body 1. The drain pipe 103 and the water inlet 104 are interconnected with the interior of the box body 1, and an operation port 105 is opened on the surface of the box body 1.

[0028] Specifically: the control terminal 101 is electrically connected to each electrically controlled device, and the staff can observe the bottle cap detection process inside the box body 1 through the observation window 102. The water inlet 104 is connected to the external water pipe, so that water can be added to the inside of the box body 1, and bubbles can be observed when the fertilizer bottle caps are detected. The water after use can be discharged from the drain pipe 103. Since a sealing cover is installed on the surface of the drain pipe 103, it can prevent the water from flowing out when it is added to the inside of the box body 1. The water added to the inside of the box body 1 just overflows the four bottle cap grooves 508. The height of the operation port 105 opened on the surface of the box body 1 meets the operation standards and will not cause the added water to overflow.

[0029] In one embodiment, the detection component 3 includes an electric push rod 301, which is fixedly embedded in the top of the box body 1. One end of the electric push rod 301 passes through the top of the box body 1 and is installed with a device shell 302. The inner cavity of the device shell 302 is fixedly installed with a motor 303. A connecting rod 304 is installed at the output end of the motor 303. One end of the connecting rod 304 passes through the surface of the device shell 302 and is connected to the output end of the motor 303. A mounting shell 305 is installed on the other side of the connecting rod 304.

[0030] Specifically: four electric push rods 301 can be started through the control terminal 101, and the electric push rods 301 operate and drive the device shell 302 connected at one end to move downward. At this time, the fertilizer bottle cap clamped at the bottom can move to the top of the bottle cap pattern 508. When the fertilizer bottle cap just reaches the surface of the bottle cap pattern 508, the motor 303 is started through the control terminal 101. The motor 303 operates and drives the connecting rod 304 to rotate slowly. At this time, the mounting shell 305 connected to the bottom end of the connecting rod 304 can drive the internal bottle cap to rotate slowly on the surface of the bottle cap pattern 508, so that the fertilizer bottle cap rotates on the detection tube 507. Since the texture of the bottle cap pattern 508 is consistent with the inner texture of the fertilizer bottle cap, the bottle cap can be rotatably fixed on the bottle cap pattern 508.

[0031] In one embodiment, the clamping assembly 4 includes a plurality of springs 401, and the plurality of springs 401 are evenly divided into two groups, one end of the two groups of springs 401 are connected to both sides of the inner wall of the mounting shell 305, the other ends of the two groups of springs 401 are installed with arc-shaped clamping plates 402, the surfaces of the two arc-shaped clamping plates 402 are installed with anti-slip pads 403, one side of the two arc-shaped clamping plates 402 is installed with a plurality of telescopic rods 404, one end of the plurality of telescopic rods 404 are installed on both sides of the inner wall of the mounting shell 305, and the plurality of telescopic rods 404 are located on the inner side of the plurality of springs 401.

[0032] Specifically: during use, the staff can extend their hands into the interior of the box body 1 through the operation port opened on the surface of the box body 1. At this time, the bottle cap to be inspected can be placed into the interior of the mounting shell 305 from the bottom. Since the curvature of the two arc-shaped clamping plates 402 can just fit the surface of the bottle cap, the bottle cap can be clamped by the two arc-shaped clamping plates 402 during the placement process. Under the action of multiple springs 401, the two arc-shaped clamping plates 402 can both be against the surface of the bottle cap, and the surfaces of the two arc-shaped clamping plates 402 are both installed with anti-skid pads 403. The surfaces of the anti-skid pads 403 have tiny protrusions, which can reduce friction when the bottle cap is rotated, so that the bottle cap is clamped more firmly. A telescopic rod 404 is installed on the inner side of the spring 401, which can limit the spring 401 to prevent it from moving left and right. Because the bottle cap will generate a reverse force on the arc-shaped clamping plate 402 during the rotation, the telescopic rod 404 can prevent the spring from deforming and deviating left and right when the force is too large.

[0033] In one embodiment, the blowing assembly 5 includes a fan 501, which is fixedly installed at the bottom of the inner cavity of the box body 2, an air inlet pipe 502 is installed on one side of the fan 501, the air inlet pipe 502 passes through the inner wall of the box body 2 and is connected to one side of the fan 501, and an air outlet pipe 503 is installed on the other side of the fan 501, one end of the air outlet pipe 503 is penetrated and installed with a water storage box 504, the water storage box 504 is fixedly installed at the bottom of the inner cavity of the box body 2, the bottom of the water storage box 504 passes through the bottom of the box body 2 and is equipped with a drain outlet 505, one side of the water storage box 504 is penetrated and connected with a connecting pipe 506, the surface of the connecting pipe 506 is penetrated and installed with four detection tubes 507, the surfaces of the four detection tubes 507 are all penetrated through the bottom of the box body 2 and embedded in the bottom of the inner cavity of the box body 1, the tops of the four detection tubes 507 are all provided with bottle cap patterns 508, and the other end of the air inlet pipe 502 is penetrated and connected to the bottom of the filter box 6.

[0034] Specifically: when the airtightness of the bottle cap is tested, the fan 501 is started through the control terminal 101, and the fan 501 operates and blows air through the air outlet pipe 503. The blown air is discharged into the water storage box 504 through the air outlet pipe 503. Since a sealing plug is installed at the bottom end of the drain port 505, air will not leak out. At this time, the blown air can reach the inside of the four detection tubes 507 through the connecting tube 506, and then the wind is blown into the bottle cap connected to the bottle cap groove 508 through the four detection tubes 507. The size of the bottle cap groove 508 can be set in accordance with the corresponding fertilizer filling bottle of the detection bottle cap. Because water is added to the inside of the box body 1 through the water inlet 104 before use, when blowing towards the bottle cap, it can be observed whether there are bubbles on the water surface at the top of the four detection tubes 507, so that the airtightness of the four bottle caps can be judged and tested.

[0035] In one embodiment, the filter box 6 is fixedly connected to one side of the box body 2, a movable door 601 is installed on the surface of the filter box 6 through a hinge, a handle 602 is installed on the surface of the movable door 601, a filter plate 603 is installed in the inner cavity of the filter box 6, and an air inlet pipe 604 is connected to the top of the filter box 6.

[0036] Specifically: the fan 501 is started by the control terminal 101. When the fan 501 is in operation, the filter box 6 is used to filter the external air. The external air enters the filter box 6 through the air inlet pipe 604, and passes through the filter plate 603 to filter impurities in the air. The movable door 601 can be opened by using the handle 602 to facilitate cleaning of the filter plate 603.

[0037] Working principle: The electric push rod 301, the motor 303, the fan 501 are electrically connected to the control terminal 101. When testing the bottle caps of the fertilizer filling bottles, an appropriate amount of bottle caps are extracted for sampling and testing, and the fertilizer bottle caps to be tested are placed through the operation port 105, so that the bottle caps are placed inside the mounting shell 305, and during the placement process, the two arc-shaped clamping plates 402 are just clamped on the surface of the bottle caps, so as to fix and clamp the placement of the bottle caps. After placing four bottle caps in sequence, the four electric push rods 301 are started through the control terminal 101, and the electric push rods 301 operate and drive the fixedly clamped bottle caps to move downward. The staff can observe The observation window 102 observes the position of the bottle cap falling. When the clamped bottle cap just reaches the top of the detection tube 507, the four motors 303 are started through the control terminal 101. The motor 303 operates and drives the clamped bottle cap to slowly rotate on the surface of the bottle cap pattern 508 through the coordinated movement of the electric push rod 301. Since the inner pattern of the bottle cap coincides with the bottle cap pattern 508, when the inner pattern of the bottle cap is damaged, the motor 303 drives the bottle cap to rotate while causing a jamming phenomenon. The jamming phenomenon of the bottle cap rotating inside the box body 1 can be observed through the observation window 102. After discovering it, the staff can reach into the interior of the box body 1 through the operation port 105 to The bottle cap can be removed manually, and the bottle cap and the bottle cap pattern 508 are used in conjunction with each other by setting the detection component 3, so as to detect the inner pattern of the fertilizer bottle cap, and the bottle cap with damaged inner pattern can be detected, and the detection efficiency is relatively high; the water inlet 104 is connected to the external water pipe, and an appropriate amount of water is added to the interior of the box body 1 to make the water level submerge the top of the detection tube 507, and the fan 501 can be started through the control terminal 101. The fan 501 operates and blows wind into the water storage box 504 through the air outlet pipe 503, and then through the connecting pipe 506, the wind passes through the four detection tubes 507 and blows into the bottle cap connected to the bottle cap pattern 508. Since the four bottle caps are all located on the water surface, Through the observation window 102, it is observed whether there are bubbles on the surfaces of the four bottle caps. Bottle caps with bubbles indicate that the sealing is unqualified. When bubbles are generated, there may be cracks in the bottle caps. At this time, a small part of the added water will flow into the connecting pipe 506 through the detection tube 507. At this time, the water will enter the water storage box 504. After the detection is completed, the sealing plug located on the surface of the drain port 505 can be removed to allow the entered water to be discharged outward. By setting up the blowing component 5, the sealing of the bottle cap can be tested, so as to detect the bottle cap with unqualified sealing, which can avoid the production of bottled fertilizers with poor sealing effect and improve the use quality of bottled fertilizers.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A bottle cap detection device for fertilizer filling bottles, characterized in that: include: A box body (1) is provided, wherein a box body (2) is fixedly mounted on the bottom of the box body (1), legs (201) are mounted on the four ends of the bottom of the box body (2), a switch door (202) is mounted on the surface of the box body (2) via a hinge, a handle (203) is mounted on one side of the surface of the switch door (202), four detection components (3) are arranged at the top of the inner cavity of the box body (1), the inner cavities of the four detection components (3) are all arranged with clamping components (4), a blowing component (5) is arranged in the inner cavity of the box body (2), and a filter box (6) is mounted on one end of the blowing component (5).

2. The bottle cap detection device for fertilizer filling bottles according to claim 1 is characterized in that: A control terminal (101) is installed on the top of one side of the box body (1), an observation window (102) is installed on the surface of one side of the box body (1), a drainage pipe (103) is installed on the bottom of one side of the box body (1), and a water inlet (104) is installed on the other side of the box body (1), the drainage pipe (103) and the water inlet (104) are interconnected with the interior of the box body (1), and an operation port (105) is opened on the surface of the box body (1).

3. The bottle cap detection device for fertilizer filling bottles according to claim 1 is characterized in that: The detection component (3) comprises an electric push rod (301), wherein the electric push rod (301) is fixedly embedded in the top of the box body (1), one end of the electric push rod (301) passes through the top of the box body (1) and is installed with a device shell (302), the inner cavity of the device shell (302) is fixedly installed with a motor (303), the output end of the motor (303) is installed with a connecting rod (304), one end of the connecting rod (304) passes through the surface of the device shell (302) and is connected to the output end of the motor (303), and the other side of the connecting rod (304) is installed with a mounting shell (305).

4. The bottle cap detection device for fertilizer filling bottles according to claim 1 is characterized in that: The clamping assembly (4) comprises a plurality of springs (401), wherein the plurality of springs (401) are evenly divided into two groups, one end of each of the two groups of springs (401) is connected to two sides of the inner wall of the mounting shell (305), the other end of each of the two groups of springs (401) is installed with an arc-shaped clamping plate (402), the surfaces of the two arc-shaped clamping plates (402) are installed with an anti-slip pad (403), one side of each of the two arc-shaped clamping plates (402) is installed with a plurality of telescopic rods (404), one end of each of the plurality of telescopic rods (404) is installed on two sides of the inner wall of the mounting shell (305), and the plurality of telescopic rods (404) are located on the inner side of the plurality of springs (401).

5. The bottle cap detection device for fertilizer filling bottles according to claim 1 is characterized in that: The blowing assembly (5) comprises a fan (501), the fan (501) being fixedly mounted at the bottom of the inner cavity of the second box (2), an air inlet pipe (502) being mounted on one side of the fan (501), the air inlet pipe (502) penetrating the inner wall of the second box (2) and being connected to one side of the fan (501), an air outlet pipe (503) being mounted on the other side of the fan (501), a water storage box (504) being mounted through one end of the air outlet pipe (503), the water storage box (504) being fixedly mounted at the bottom of the inner cavity of the second box (2), the water storage box The bottom of the water storage box (504) passes through the bottom of the second box (2) and is equipped with a drain outlet (505). A connecting pipe (506) is connected to one side of the water storage box (504). Four detection tubes (507) are installed on the surface of the connecting pipe (506). The surfaces of the four detection tubes (507) all pass through the bottom of the second box (2) and are embedded in the bottom of the inner cavity of the first box (1). Bottle cap patterns (508) are opened on the tops of the four detection tubes (507). The other end of the air inlet pipe (502) is connected to the bottom of the filter box (6).

6. The bottle cap detection device for fertilizer filling bottles according to claim 1 is characterized in that: The filter box (6) is fixedly connected to one side of the box body (2); a movable door (601) is installed on the surface of the filter box (6) via a hinge; a handle (602) is installed on the surface of the movable door (601); a filter plate (603) is installed in the inner cavity of the filter box (6); and an air inlet pipe (604) is connected to the top of the filter box (6).

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