Automatic drainage mechanism

Abstract

The utility model relates to an automatic drainage mechanism which comprises an air pump, a water level control mechanism, an air inlet pipe, a water pumping pipe, a drainage pipe, a filtering piece and a cleaning assembly, the air pump is connected with the air inlet pipe, the water pumping pipe and the drainage pipe, and the water level control mechanism is used for controlling opening and closing of the air inlet pipe. The filtering part is arranged at the water inlet end of the water pumping pipe, the cleaning assembly is arranged on the water pumping pipe and comprises a cleaning part, a driving part and a transmission part, and the cleaning part is in transmission connection with the driving part through the transmission part so as to drive the cleaning part to clean the filtering part. By means of the technical scheme, the automatic drainage mechanism can avoid pipeline blockage, and smooth drainage is guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of drainage, and in particular, to an automatic drainage mechanism. Background Art

[0002] The power of the air pump mainly comes from high-pressure wind, with a small head, energy saving and durability, so it is widely used in mine tunnel drainage. The accumulated water in the mine tunnel usually contains a large amount of solid particles. In the related technology, although the automatic drainage mechanism has achieved automatic drainage to a certain extent, it is easy to cause pipe blockage, resulting in failure to drain smoothly. Utility Model Content

[0003] The purpose of the present disclosure is to provide an automatic drainage mechanism, which can avoid pipe blockage and ensure smooth drainage.

[0004] In order to achieve the above-mentioned objectives, the present disclosure provides an automatic drainage mechanism, comprising: an air pump, a water level control mechanism, an air inlet pipe, a water suction pipe, a drain pipe, a filter element and a cleaning component, the air pump is connected to the air inlet pipe, the water suction pipe and the drain pipe, the water level control mechanism is used to control the opening and closing of the air inlet pipe, the filter element is provided at the water inlet end of the water suction pipe, the cleaning component is arranged on the water suction pipe and comprises a cleaning element, a driving element and a transmission element, the cleaning element is connected to the driving element through the transmission element, so as to drive the cleaning element to clean the filter element.

[0005] Optionally, the automatic drainage mechanism includes a first mounting seat and a second mounting seat, the first mounting seat is sleeved on the water suction pipe and arranged at the water inlet end of the water suction pipe, the second mounting seat is connected to the first mounting seat and is provided with a water inlet connected to the pipe mouth of the water suction pipe, the filter element forms a water filtration space and is covered at the water inlet and fixed to the second mounting seat, the cleaning element, the driving element and the transmission element are all arranged in the water filtration space, and the cleaning element is in contact with the inner wall of the filter element.

[0006] Optionally, the filter element is a filter screen, and the filter screen is spherical or cylindrical.

[0007] Optionally, the cleaning assembly further includes a connecting rod, the driving member is configured as a fan blade, the connecting rod extends perpendicularly to the second mounting seat and is rotatably connected to the second mounting seat, the fan blade is fixedly mounted on the connecting rod and is transmission-connected to the cleaning member via the transmission member.

[0008] Optionally, the filter screen cover is constructed as a spherical shape, the cleaning member is constructed as an arc-shaped brush, the transmission member includes two transmission rods, one end of the two transmission rods is respectively fixedly connected to the connecting rod, and the other end is respectively connected to the arc-shaped brush, and the arc-shaped brush is in contact with the inner wall of the filter screen cover.

[0009] Optionally, the arc-shaped brush is detachably connected to the transmission rod.

[0010] Optionally, the water level control mechanism includes a detection component, the detection component includes a monitoring component and a switch valve, the monitoring component is used to monitor the water level, and the switch valve is arranged on the air inlet pipe and is used to open or close the air inlet pipe.

[0011] Optionally, the switch valve is constructed as a magnetic valve, and the detection assembly also includes a guide rod, a magnetic component and a float. The guide rod is connected to the valve body of the magnetic valve, the magnetic component and the float are inserted into the guide rod, and the float is connected to the magnetic component via a cable. The magnetic component is frictionally matched with the guide rod, and the float is slidingly matched with the guide rod, and the magnetic component is used as the monitoring component.

[0012] Optionally, a limiting portion is provided at the end of the guide rod, and the limiting portion is used to limit the float ball to the guide rod.

[0013] Optionally, the automatic drainage mechanism further includes a controller, an ultrasonic sensor and an audible and visual alarm, wherein the ultrasonic sensor is used to detect the thickness of impurities attached to the filter element, and the audible and visual alarm and the ultrasonic sensor are electrically connected to the controller respectively.

[0014] Through the above technical scheme, the automatic drainage mechanism provided by the present invention has a filter element at the water inlet end of the pumping pipe, through which large particles can be filtered to avoid clogging of the pipe. A cleaning component is arranged on the pumping pipe, and the cleaning component includes a cleaning component, a driving component and a transmission component. The cleaning component is connected to the driving component through the transmission component, so that the driving component can drive the cleaning component to move through the transmission component, thereby cleaning the filter element and avoiding clogging of the filter element, thereby ensuring smooth drainage and improving drainage efficiency.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0017] Figure 1is a structural schematic diagram of the automatic drainage mechanism according to an embodiment of the present disclosure;

[0018] Figure 2 is a schematic diagram of the installation of the filter element described in the embodiment of the present disclosure;

[0019] Figure 3 yes Figure 1 A partial enlarged view of point A in the middle.

[0020] Description of Reference Numerals

[0021] 1-air pump; 2-water level control mechanism; 200-detection component; 21-switch valve; 22-guide rod; 23-monitoring component; 24-float; 25-limiting part; 26-pull rope; 3-air inlet pipe; 4-filter element; 41-filter screen; 5-cleaning component; 51-cleaning element; 52-arc brush; 53-transmission rod; 54-fan blade; 55-connecting rod; 6-first mounting seat, 60-water inlet; 61-second mounting seat; 7-water suction pipe; 10-fixed frame; 20-ultrasonic sensor; 30-sound and light alarm; 40-water filtration space. DETAILED DESCRIPTION

[0022] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0023] In the present disclosure, unless otherwise stated, the terms "first", "second", etc. used in the present disclosure are intended to distinguish one element from another and do not have order or importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be construed as limiting the present disclosure.

[0024] The present invention provides an automatic drainage mechanism, referring to Figures 1 to 3 As shown in the figure, it includes: an air pump 1, a water level control mechanism 2, an air inlet pipe 3, a water suction pipe 7, a drain pipe, a filter 4 and a cleaning component 5. The air pump 1 is connected to the air inlet pipe 3, the water suction pipe 7 and the drain pipe. The water level control mechanism 2 is used to control the opening and closing of the air inlet pipe 3. The water inlet end of the water suction pipe 7 is provided with a filter 4. The cleaning component 5 is arranged on the water suction pipe 7 and includes a cleaning component 51, a driving component and a transmission component. The cleaning component 51 is connected to the driving component through the transmission component to drive the cleaning component 51 to clean the filter 4.

[0025] Through the above technical scheme, the automatic drainage mechanism provided by the present invention has a filter element 4 at the water inlet end of the pumping pipe 7, through which large particulate matter can be filtered to avoid clogging of the pipeline. A cleaning component 5 is arranged on the pumping pipe 7, and the cleaning component 5 includes a cleaning component 51, a driving component and a transmission component. The cleaning component 51 is connected to the driving component through the transmission component, so that the driving component can drive the cleaning component 51 to move through the transmission component, thereby cleaning the filter element 4 and avoiding clogging of the filter element 4, thereby ensuring smooth drainage and improving drainage efficiency.

[0026] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 2 As shown in the figure, the automatic drainage mechanism may include a first mounting seat 6 and a second mounting seat 61, the first mounting seat 6 is sleeved on the water suction pipe 7 and arranged at the water inlet end of the water suction pipe 7, the second mounting seat 61 is connected to the first mounting seat 6 and is provided with a water inlet 60 connected to the pipe mouth of the water suction pipe 7, the filter element 4 forms a water filtration space 40 and is covered at the water inlet 60 and fixed to the second mounting seat 61, the cleaning element 51, the driving element and the transmission element are all arranged in the water filtration space 40, and the cleaning element 51 is in contact with the inner wall of the filter element 4. In the above technical solution, the first mounting seat 6 can be fixedly connected to the water suction pipe 7, and the second mounting seat 61 can be connected to the first mounting seat 6 by bolts. In this way, the first mounting seat 6 and the second mounting seat 61 can be disassembled. Since the filter element 4 is fixed to the second mounting seat 61, and the cleaning element 51, the driving element and the transmission element are all arranged in the water filtering space 40 of the filter element 4, the cleaning element 51, the driving element, the transmission element, the filter element 4 and the second mounting seat 61 form a module that can be independently disassembled. When the filter element 4 or the cleaning component 5 needs to be replaced, the entire module can be disassembled by simply removing the bolts, which is convenient for replacing the module. By dismantling the module, it is also convenient to replace the local structure inside the module.

[0027] In order to improve the versatility and interchangeability of the first mounting seat 6 and the second mounting seat 61, the first mounting seat 6 and the second mounting seat 61 can be set as flanges, and the center hole of the flange is connected to the pipe mouth of the water suction pipe 7 to form the above-mentioned water inlet 60. In this way, the production, manufacturing and maintenance costs are reduced and disassembly and assembly are facilitated.

[0028] In addition, the first mounting seat 6 and the second mounting seat 61 can also be connected by threaded connection. When replacement is required, the second mounting seat 61 can be rotated to remove the second mounting seat 61, the filter element 4 and the cleaning component 5 from the pipe mouth of the water suction pipe 7 at the same time, so as to facilitate the replacement of the module or the replacement of the local structure.

[0029] In order to improve the water absorption efficiency, the first mounting seat 6 and the second mounting seat 61 can be sealed and connected. When the second mounting seat 61 and the first mounting seat 6 are connected by bolts, a sealing ring can be set between the first mounting seat 6 and the second mounting seat 61 to achieve a sealing effect; when the second mounting seat 61 and the first mounting seat 6 are threadedly connected, a raw tape can be wrapped between the second mounting seat 61 and the first mounting seat 6 to achieve a sealing effect.

[0030] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 3 As shown in , the filter element 4 may be a filter screen cover 41, and the filter screen cover 41 may be spherical or cylindrical. Thus, the spherical or cylindrical filter screen cover 41 has a larger filtering area, improves filtering efficiency, and reduces the risk of clogging. In addition, the spherical or cylindrical filter screen cover 41 has a larger accommodation space inside, that is, a larger water filtering space 40, which is easy to disassemble and assemble the cleaning element 51, the driving element, and the transmission element.

[0031] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 3 As shown in , the cleaning assembly 5 may also include a connecting rod 55, the driving member is configured as a fan blade 54, the connecting rod 55 extends perpendicularly to the second mounting seat 61 and is rotatably connected to the second mounting seat 61, and the fan blade 54 is fixedly mounted on the connecting rod 55 and is transmission-connected to the cleaning member 51 through a transmission member. In the above technical solution, the connecting rod 55 may be arranged to penetrate the center of the filter screen cover 41 and coincide with the central axis of the filter screen cover 41 perpendicular to the second mounting seat 61, so that the fan blade 54 can be arranged close to the center of the filter screen cover 41, so as to be subjected to the uniform force of the water flow, ensuring that the fan blade 54 can rotate smoothly, thereby driving the cleaning member 51 to rotate stably, thereby improving the cleaning effect.

[0032] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 3 As shown in , the filter screen cover 41 is constructed as a spherical shape, the cleaning member 51 is constructed as an arc-shaped brush 52, and the transmission member includes two transmission rods 53. One end of the two transmission rods 53 is fixedly connected to the connecting rod 55 respectively, and the other end is connected to the arc-shaped brush 52 respectively. The arc-shaped brush 52 fits the inner wall of the filter screen cover 41. Here, the cleaning member 51 is constructed as an arc-shaped brush 52, which is convenient for better fitting with the inner wall of the filter screen cover 41. The arc-shaped brush 52 is fixedly connected to the connecting rod 55 by two transmission rods 53, which improves the stability of the fixing of the arc-shaped brush 52, and ensures that during the cleaning process, the inner wall of the filter screen cover 41 opposite to the arc-shaped brush 52 can effectively fit with the bristles of the arc-shaped brush 52, thereby improving the cleaning effect.

[0033] In order to facilitate the replacement of the arc brush 52, the transmission rod 53 and the connecting rod 55 can be connected in a detachable manner. For example, the transmission rod 53 and the connecting rod 55 can be connected by screws. In addition, the arc brush 52 and the transmission rod 53 can also be connected in a detachable manner. Specifically, a mounting block can be set on the arc brush 52, and the transmission rod 53 and the mounting block are connected by screws. In this way, when any one of the arc brush 52 and the transmission rod 53 needs to be replaced, both can be replaced independently, which is more flexible to use and easy to disassemble and assemble.

[0034] In order to improve the cleaning efficiency, the number of arc-shaped brushes 52 can be set to two or more, and each arc-shaped brush 52 is fixedly connected to the connecting rod 55 through its own transmission member (i.e., two transmission rods 53). Figure 1 As shown in , the water level control mechanism 2 includes a detection component 200, and the detection component 200 includes a monitoring component 23 and a switch valve 21. The monitoring component 23 is used to monitor the water level, and the switch valve 21 is arranged on the air inlet pipe 3 and is used to open or close the air inlet pipe 3. In the above technical solution, the monitoring component 23 can be an ultrasonic sensor or a pressure sensor. The water level is monitored by the monitoring component 23 so that water can be pumped in time when the water level reaches the set value. The switch valve 21 is used to open or close the air inlet pipe 3, thereby achieving the function of controlling the opening and closing of the air pump 1. In the exemplary embodiment provided by the present disclosure, reference is made to Figure 1 As shown in , the switch valve 21 is constructed as a magnetic valve, and the detection component 200 also includes a guide rod 22, a magnetic member and a float 24. The guide rod 22 is connected to the valve body of the magnetic valve, the magnetic member and the float 24 are inserted into the guide rod 22, and the float 24 is connected to the magnetic member through a cable 26. The magnetic member and the guide rod 22 are frictionally matched, and the float 24 and the guide rod 22 are slidingly matched. The magnetic member is used as a monitoring member 23. In the above scheme, due to the frictional match between the magnetic member and the guide rod 22, when the magnetic member is not subjected to external force, the magnetic member will not move relative to the guide rod 22, that is, the magnetic member can be stably located on the guide rod 22. When the water level rises, the float 24 moves up under the action of buoyancy. As the water level rises, the float 24 will gradually move up and collide with the magnetic member, and push the magnetic member to move upward along the guide rod 22. When the water level reaches the set value (the water level value that needs to be pumped), under the thrust of the float 24 The magnetic component is magnetically connected to the magnetic valve, so that the magnetic valve is opened to conduct the air inlet pipe 3. On the contrary, when the water level drops, the float 24 will gradually move downward. When the float 24 moves downward to make the cable 26 in a stretched state, the cable 26 will exert a downward pulling force on the magnetic component. Under the action of the pulling force, the magnetic component moves downward along the guide rod 22 until the magnetic component is away from the magnetic valve, so as to release the magnetic attraction force of the magnetic component on the magnetic valve, so that the magnetic valve returns to its initial closed state, thereby putting the air inlet pipe 3 in a cut-off state.

[0035] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 As shown in , the end of the guide rod 22 is provided with a limiting portion 25, and the limiting portion 25 is used to limit the floating ball 24 to the guide rod 22. In this way, the magnetic member and the floating ball 24 are prevented from being separated from the guide rod 22, and the stability of use is improved.

[0036] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 As shown in , the automatic drainage mechanism also includes a controller, an ultrasonic sensor 20 and an audible and visual alarm 30. The ultrasonic sensor 20 is used to detect the thickness of impurities attached to the filter element 4. The audible and visual alarm 30 and the ultrasonic sensor 20 are electrically connected to the controller, respectively. On the basis of the above technical scheme, in order to prevent the automatic drainage mechanism from being subjected to external impact during use and to improve the stability of the automatic drainage mechanism during use, the automatic drainage mechanism can be provided to also include a fixing frame 10, and the pull rope 26, the float 24, the water inlet 60 and the filter screen cover 41 are all arranged in the fixing frame 10. The switch valve 21 can be fixed to the fixing frame 10, and the audible and visual alarm 30 and the ultrasonic sensor 20 are both installed on the fixing frame 10. In this way, the fixing frame 10 can intercept large pieces of matter, such as stones, mud, etc., to prevent large pieces of matter from affecting the filter screen cover 41, the audible and visual alarm 30, and the ultrasonic sensor 20. The ultrasonic sensor 20 and the sound and light alarm 30 generate a large impact force, which plays a certain protective role and enables the automatic drainage mechanism to be used normally. Among them, the ultrasonic sensor 20 is installed at the bottom of the fixed frame 10 and is located below the filter screen cover 41. In this way, when the impurity deposition thickness reaches the ultrasonic sensor 20 during the pumping process, the ultrasonic sensor 20 detects the deposited impurities and sends a detection signal to the controller. The controller controls the sound and light alarm 30 to alarm, reminding the staff to clean up the deposited impurities in time to avoid impurities accumulating at the water inlet end of the pumping pipe 7 and affecting the pumping, thereby ensuring smooth pumping and improving the pumping efficiency.

[0037] In order to facilitate the adjustment of the height of the water inlet 60, the pumping pipe 7 can be a hose, and the length of the pumping pipe 7 can be set to be greater than the depth of each mine. In this way, in actual use, the operator can control the length of the pumping pipe 7 along the depth direction of the mine according to the depth of the mine, so that the water inlet 60 reaches a suitable placement position at the bottom of the mine. When the pumping is completed, the pumping pipe 7 can be rolled up for easy storage, and the pumping needs of mines with different depths can be met, thereby expanding the scope of use.

[0038] The working principle of the automatic drainage mechanism disclosed in the present invention is that when in use, the air inlet pipe 3 can be connected with the external source (not shown in the figure). As the water level in the mine tunnel continues to rise, the float 24 rises accordingly. As the water level continues to rise, the float 24 will gradually move up and conflict with the magnetic part, and push the magnetic part to move upward along the guide rod 22. When the water level reaches the set value (the water level value required for pumping), the float 24 pushes the magnetic part, and a magnetic attraction is generated between the magnetic part and the magnetic valve. The magnetic valve is opened to conduct the air inlet pipe 3, and the gas from the external air source The air enters the air pump 1 through the air inlet pipe 3, and the air pump 1 is started to pump water. When pumping water, the accumulated water first passes through the filter screen cover 41 to filter out large particles and then enters the air pump 1 through the water inlet 60, so as to prevent large particles from entering the air inlet pipe 3 and causing the pipe to be blocked. In addition, during the pumping process, under the action of the flow of water, the fan blades 54 rotate, and the rotation of the fan blades 54 drives the connecting rod 55 to rotate, and the connecting rod 55 drives the transmission rod 53 to rotate, and the transmission rod 53 rotates and drives the cleaning member 51 to rotate, and the cleaning member 51 rotates to clean the side wall of the filter screen cover 41, so as to avoid Impurities accumulation may cause clogging of the filter screen 41. During the pumping process, impurities will be deposited. When the thickness of the impurities reaches the position of the ultrasonic sensor 20, the ultrasonic sensor 20 detects the deposited impurities and sends a detection signal to the controller. The controller controls the sound and light alarm 30 to alarm, reminding the staff to clean up the deposited impurities in time to avoid the accumulation of impurities at the water inlet end of the pumping pipe 7 affecting the pumping, ensuring the smooth pumping and improving the pumping efficiency. After the water level drops due to pumping, the float 24 will gradually move down. When the float 24 moves down to the point where the pumping pipe 7 is pulled The cable 26 is in a stretched state, and the cable 26 will exert a downward pulling force on the magnetic part. Under the action of the pulling force, the magnetic part moves downward along the guide rod 22 until the magnetic part is away from the magnetic valve, so as to release the magnetic attraction force of the magnetic part on the magnetic valve, so that the magnetic valve returns to its initial closed state. The air inlet pipe 3 is in a cut-off state, the air pump 1 is turned off, and the pumping is stopped to complete the drainage operation. When the water level rises again and reaches the water level value required for pumping, the automatic drainage mechanism starts the air pump again according to the above process to perform the pumping operation, and the cycle is repeated to achieve the effect of automatic drainage.

[0039] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0040] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0041] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An automatic drainage mechanism, characterized in that: include: An air pump, a water level control mechanism, an air inlet pipe, a water suction pipe, a drain pipe, a filter and a cleaning component, wherein the air pump is connected to the air inlet pipe, the water suction pipe and the drain pipe, the water level control mechanism is used to control the opening and closing of the air inlet pipe, the filter is provided at the water inlet end of the water suction pipe, the cleaning component is arranged on the water suction pipe and comprises a cleaning component, a driving component and a transmission component, the cleaning component is connected to the driving component through the transmission component to drive the cleaning component to clean the filter.

2. The automatic drainage mechanism according to claim 1, characterized in that: The automatic drainage mechanism includes a first mounting seat and a second mounting seat, the first mounting seat is sleeved on the water suction pipe and arranged at the water inlet end of the water suction pipe, the second mounting seat is connected to the first mounting seat and is provided with a water inlet connected to the pipe mouth of the water suction pipe, the filter element forms a water filtration space and is covered at the water inlet and fixed to the second mounting seat, the cleaning element, the driving element and the transmission element are all arranged in the water filtration space, and the cleaning element is in contact with the inner wall of the filter element.

3. The automatic drainage mechanism according to claim 2, characterized in that: The filter element is a filter screen cover, and the filter screen cover is spherical or cylindrical.

4. The automatic drainage mechanism according to claim 3, characterized in that: The cleaning assembly also includes a connecting rod, the driving member is configured as a fan blade, the connecting rod extends perpendicularly to the second mounting seat and is rotatably connected to the second mounting seat, the fan blade is fixedly mounted on the connecting rod and is transmission-connected to the cleaning member via the transmission member.

5. The automatic drainage mechanism according to claim 4, characterized in that: The filter screen cover is spherical in shape, the cleaning member is an arc-shaped brush, the transmission member includes two transmission rods, one end of the two transmission rods is fixedly connected to the connecting rods, and the other end is connected to the arc-shaped brushes, and the arc-shaped brushes are in contact with the inner wall of the filter screen cover.

6. The automatic drainage mechanism according to claim 5, characterized in that: The arc-shaped brush is detachably connected to the transmission rod.

7. The automatic drainage mechanism according to any one of claims 1 to 6, characterized in that: The water level control mechanism includes a detection component, and the detection component includes a monitoring component and a switch valve. The monitoring component is used to monitor the water level, and the switch valve is arranged on the air inlet pipe and is used to open or close the air inlet pipe.

8. The automatic drainage mechanism according to claim 7, characterized in that: The switch valve is constructed as a magnetic valve, and the detection component also includes a guide rod, a magnetic part and a float. The guide rod is connected to the valve body of the magnetic valve, the magnetic part and the float are inserted into the guide rod, and the float is connected to the magnetic part through a cable. The magnetic part is frictionally engaged with the guide rod, and the float is slidingly engaged with the guide rod. The magnetic part is used as the monitoring part.

9. The automatic drainage mechanism according to claim 8, characterized in that: A limiting portion is disposed at the end of the guide rod, and the limiting portion is used to limit the float ball to the guide rod.

10. The automatic drainage mechanism according to claim 7, characterized in that: The automatic drainage mechanism also includes a controller, an ultrasonic sensor and an audible and visual alarm. The ultrasonic sensor is used to detect the thickness of impurities attached to the filter element. The audible and visual alarm and the ultrasonic sensor are electrically connected to the controller respectively.

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