Water sample filtering device capable of rapidly replacing filter element and used for environmental monitoring

Abstract

The invention relates to the technical field of environmental monitoring, in particular to an environmental monitoring water sample filtering device capable of quickly replacing a filter element, which comprises a rack, a water adding assembly, a detection assembly, a filtering table and a plurality of filtering monitoring mechanisms, a plurality of butt joint grooves are formed in the filtering table, and a filtering lining cylinder is arranged in each butt joint groove; the filtering monitoring mechanism comprises a flow velocity monitoring mechanism and a partition mechanism, the flow velocity monitoring mechanism comprises a flow velocity conversion structure, a first monitoring structure and a second monitoring structure, and the flow velocity conversion structure is used for converting kinetic energy of water flow into rotational motion of the flow velocity conversion structure; the first monitoring structure and the second monitoring structure are used for monitoring the change of the rotating speed of the flow velocity conversion structure; the plurality of partition mechanisms are respectively arranged at the lower ends of the plurality of flow velocity monitoring mechanisms; the filter table, the flow velocity conversion structure, the first monitoring structure, the second monitoring structure and the partition mechanism are arranged, so that the situation that impurities flow into the detection assembly due to the fact that the detection assembly cannot effectively detect that the filter lining cylinder is damaged is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental monitoring, and particularly to an environmental monitoring water sample filtering device with a filter element that can be quickly replaced. Background Art

[0002] In the field of environmental monitoring, the accurate detection of water samples is crucial for understanding the water quality status and evaluating the ecological environment. Water samples often contain solid impurities such as sediment and suspended matter. If directly detected, it will interfere with the instrument accuracy and lead to data deviation. Therefore, filtration has become an essential key step before detection.

[0003] The patent with the publication number CN118807300B discloses an environmental monitoring and analysis water sample filtering device. When in use, after the water sample is filtered through the filter inner cylinder, the water sample first falls into the water receiving tray. When the filter inner cylinder is not blocked, the rate at which the water sample falls into the water receiving tray is greater than the leakage rate of the leakage holes, so that the gravity of the water receiving tray gradually increases, and then the water receiving tray moves downward and compresses the second return spring. At this time, the first pressure sensor is no longer abutted by the side abutting rod. When the water level in the water receiving tray rises to the position of the overflow tank opening, the side abutting rod at the bottom will abut the second pressure sensor. On the contrary, when impurities accumulate and block the filter inner cylinder, the rate at which the water sample falls into the water receiving tray decreases and eventually becomes equivalent to the leakage speed of the leakage holes. During the entire filtration process, the second pressure sensor will not be triggered. In summary, when the control panel loses the signal of the first pressure sensor first during the filtration process, then receives the signal of the second pressure sensor, and finally, receives the signal of the first pressure sensor again, it indicates that there is no accumulation or blockage of impurities in the filter inner cylinder. When the control panel loses the signal of the first pressure sensor first during the filtration process and then receives the signal of the first pressure sensor again, and does not receive the signal of the second pressure sensor during the process, it indicates that the water passing effect of the filter inner cylinder has decreased significantly, which means that the filter inner cylinder is blocked and needs to be cleaned.

[0004] Although the above solution can determine whether there is a blockage inside the filter inner cylinder through the contact change between the side abutting rod and the two pressure sensors, when the filter inner cylinder is partially damaged, the partial damage will cause the water sample to pass through the filter inner cylinder faster because the damaged area has no filtering effect and the water sample can pass directly. This will cause the water level in the water receiving tray to rise rapidly, similar to the situation where the filter inner cylinder is not blocked, resulting in the detection component failing to accurately detect the accumulation and blockage of impurities in the filter inner cylinder, and causing some impurities to flow into the detection component. Summary of the Invention

[0005] To address the above problems, a water sample filtering device for environmental monitoring with a quick filter element replacement is provided. By setting up a filtering table, a flow velocity conversion structure, a first monitoring structure, a second monitoring structure, and a partition mechanism, it is possible to prevent foreign matter from flowing into the detection component due to the failure of the detection component to effectively detect damage to the filter inner cylinder.

[0006] To solve the problems of the prior art, the present invention provides a water sample filtering device for environmental monitoring with a quick filter element replacement, which includes a frame and a water addition component and a detection component arranged at the upper and lower ends of the frame, and also includes a filtering table and a plurality of filtering and monitoring mechanisms; the filtering table is horizontally arranged in the middle of the frame and can reciprocate along its own length direction. A plurality of docking grooves are arranged along the length direction of the filtering table, and a filter inner cylinder is arranged in each docking groove; a plurality of filtering and monitoring mechanisms are respectively arranged at the lower ends of the plurality of filter inner cylinders. The filtering and monitoring mechanism includes a flow velocity monitoring mechanism and a partition mechanism. The flow velocity monitoring mechanism includes a flow velocity conversion structure, a first monitoring structure, and a second monitoring structure. The flow velocity conversion structure is used to convert the kinetic energy of the water flow into its own rotational motion, and the first monitoring structure and the second monitoring structure are used to monitor the change in the rotational speed of the flow velocity conversion structure; a plurality of partition mechanisms are respectively arranged at the lower ends of the plurality of flow velocity monitoring mechanisms.

[0007] Preferably, the flow velocity conversion structure includes two mounting plates and a plurality of conversion components; the two mounting plates are arranged in parallel on both sides of the filter inner cylinder; the plurality of conversion components are arranged at equal intervals between the two mounting plates, and the plurality of conversion components divide the lower end of the filter inner cylinder into a plurality of parts.

[0008] Preferably, the conversion component includes a first rotating shaft, a conversion fan blade, and a flow concentrating cover; both ends of the first rotating shaft are rotatably connected to the two mounting plates respectively; the conversion fan blade is sleeved on the first rotating shaft; the flow concentrating cover is arranged at the upper end of the conversion fan blade, and the flow concentrating cover is used to concentrate the water flow within its covered range to the conversion fan blade.

[0009] Preferably, the first monitoring structure includes a rotary encoder capable of monitoring the rotational speed of the first rotating shaft, and the rotary encoder is used to directly monitor the rotational speed of the first rotating shaft.

[0010] Preferably, the second monitoring structure includes a signal amplification structure, a telescopic arm, and a trigger component; the signal amplification structure is used to amplify the rotational speed of the first rotating shaft; the telescopic arm is connected to the signal amplification structure, and the telescopic arm extends under the action of centrifugal force to contact the trigger component; the trigger component is arranged on one side of the telescopic arm.

[0011] Preferably, the trigger component includes a contact switch, and the contact switch includes a signal generating device, two wires, and a conductive sheet; both ends of the signal generating device are respectively connected to the two wires; the two wires are in an open circuit state; the conductive sheet is connected to the telescopic arm, and when the conductive sheet is between the two wires, the circuit is connected.

[0012] Preferably, the triggering component further includes a U-shaped frame and two pressing components. The two pressing components are respectively arranged at both ends of the U-shaped frame. The pressing component includes a guide rod and a second spring. The guide rod is slidably connected to the U-shaped frame, and the wire is connected to the guide rod. The second spring is used to apply a thrust force to the guide rod towards the middle of the U-shaped frame.

[0013] Preferably, the pressing component further includes a limiting ring. The limiting ring is connected to the guide rod and is used to limit the distance that the second spring pushes the guide rod to move.

[0014] Preferably, the signal amplification structure includes a second rotating shaft and a rotational speed amplification component. The second rotating shaft is arranged parallel to one side of the first rotating shaft, and the telescopic arm is connected to the second rotating shaft. Both ends of the rotational speed amplification component are respectively connected to the first rotating shaft and the second rotating shaft.

[0015] Preferably, the telescopic arm includes a sleeve, a telescopic rod, and a first spring. One end of the sleeve is connected to the second rotating shaft. The telescopic rod is slidably arranged inside the sleeve, and one end of the telescopic rod extends out of the sleeve and is connected to the conductive sheet. The first spring is arranged inside the sleeve and is used to apply a force to the telescopic rod towards the inside of the sleeve.

[0016] The beneficial effects of the present invention compared with the prior art are as follows: 1. The present invention is provided with a filtering table, a flow velocity conversion structure, a first monitoring structure, a second monitoring structure, and a partition mechanism. The filtering table can move to switch the filtering inner liner cylinder, realizing the rapid replacement of the filtering inner liner cylinder, ensuring the continuity of the filtering process. The flow velocity conversion structure converts the kinetic energy of water flow into rotational motion, providing a visual physical signal for monitoring, i.e., the change in rotational speed. The first monitoring structure and the second monitoring structure form a redundant monitoring system to ensure the reliable capture of abnormal signals. The partition mechanism is linked with the first monitoring structure and the second monitoring structure. Once one of the first monitoring structure and the second monitoring structure detects abnormal flow velocity, the partition mechanism immediately blocks the water flow to prevent debris from entering the detection component, thereby avoiding the inflow of debris into the detection component due to the failure of the detection component to effectively detect the damage of the filtering inner liner cylinder.

[0017] 2. The present invention is provided with multiple conversion components. The multiple conversion components disperse the water flow to different areas, reducing the water flow rate received by a single conversion component. When a local breakage occurs in the filtering inner liner cylinder in the area corresponding to a certain conversion component, the change in the water flow velocity in this area is more significant, driving the rotational speed of the corresponding conversion component to increase significantly, facilitating the timely capture of abnormalities by the first monitoring structure and the second monitoring structure, thereby improving the sensitivity of the change in water flow velocity when the filtering inner liner cylinder is damaged and timely judging the damage condition of the filtering inner liner cylinder.

[0018] 3. The present invention is provided with a first rotating shaft, a conversion fan blade and a flow concentrating cover. The flow concentrating cover collects and guides water flow, reduces the contact area between the water flow and the conversion fan blade, increases the impact force of the water flow on the unit area of the conversion fan blade, makes the force for the conversion fan blade to drive the first rotating shaft to rotate stronger, and through the cooperation of the flow concentrating cover, the conversion fan blade and the first rotating shaft, the first rotating shaft can quickly respond to the subtle changes in the water sample flow rate, thereby improving the sensitivity of water sample flow rate monitoring. Description of the Drawings

[0019] Figure 1 is a perspective view of a water sample filtering device for environmental monitoring with a quickly replaceable filter element according to the present invention.

[0020] Figure 2 is a left view of the frame, the filtering table, the filtering inner cylinder and the filtering monitoring mechanism in a water sample filtering device for environmental monitoring with a quickly replaceable filter element according to the present invention.

[0021] Figure 3 is Figure 2 a perspective cross-sectional view at A-A in

[0022] Figure 4 is a perspective view of the filtering inner cylinder, the flow rate conversion structure, the first monitoring structure and the second monitoring structure in a water sample filtering device for environmental monitoring with a quickly replaceable filter element according to the present invention.

[0023] Figure 5 is a perspective view of the mounting plate and the conversion assembly in a water sample filtering device for environmental monitoring with a quickly replaceable filter element according to the present invention.

[0024] Figure 6 is a perspective view of the first rotating shaft, the conversion fan blade and the flow concentrating cover in a water sample filtering device for environmental monitoring with a quickly replaceable filter element according to the present invention.

[0025] Figure 7 is a perspective view of the first rotating shaft and the rotary encoder in a water sample filtering device for environmental monitoring with a quickly replaceable filter element according to the present invention.

[0026] Figure 8 is a perspective view of the first rotating shaft, the signal amplification structure, the telescopic arm and the triggering assembly in a water sample filtering device for environmental monitoring with a quickly replaceable filter element according to the present invention.

[0027] Figure 9 is a perspective view of the contact switch, the U-shaped frame and the pressing assembly in a water sample filtering device for environmental monitoring with a quickly replaceable filter element according to the present invention.

[0028] Figure 10 is a perspective view of the signal generating device, the wire, the U-shaped frame, the guide rod, the second spring and the limiting ring in a water sample filtering device for environmental monitoring with a quickly replaceable filter element according to the present invention.

[0029] Figure 11 It is a perspective view of the first rotating shaft, the second rotating shaft, the rotational speed amplification assembly, and the telescopic arm in an environmental monitoring water sample filtering device with a quickly replaceable filter element according to the present invention.

[0030] Figure 12 It is an exploded view of the telescopic arm and the conductive sheet in an environmental monitoring water sample filtering device with a quickly replaceable filter element according to the present invention.

[0031] The reference numerals in the figure are: 1, frame; 2, water adding assembly; 3, detection assembly; 4, filtering table; 5, filtering inner lining cylinder; 6, flow velocity monitoring mechanism; 61, flow velocity conversion structure; 611, mounting plate; 612, conversion assembly; 6121, first rotating shaft; 6122, conversion fan blade; 6123, flow concentrating cover; 62, first monitoring structure; 621, rotary encoder; 63, signal amplification structure; 631, second rotating shaft; 632, rotational speed amplification assembly; 6321, first driving wheel; 6322, second driving wheel; 6323, synchronous belt; 64, telescopic arm; 641, sleeve; 642, telescopic rod; 643, first spring; 65, triggering assembly; 651, contact switch; 6511, signal generating device; 6512, wire; 6513, conductive sheet; 652, U-shaped frame; 653, pressing assembly; 6531, guide rod; 6532, second spring; 6533, limiting ring; 7, partition mechanism; 71, funnel cover; 72, electric control valve. Detailed implementation manners

[0032] To further understand the features, technical means, and the specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0033] Refer to Figures 1 to 12 As shown: An environmental monitoring water sample filtering device with a quickly replaceable filter element includes a frame 1 and a water adding assembly 2 and a detection assembly 3 provided at the upper and lower ends of the frame 1, and further includes a filtering table 4 and a plurality of filtering and monitoring mechanisms; the filtering table 4 is horizontally arranged in the middle of the frame 1 and can reciprocate along its own length direction, a plurality of docking grooves are arranged along the length direction of the filtering table 4, and a filtering inner lining cylinder 5 is arranged in each docking groove; a plurality of filtering and monitoring mechanisms are respectively arranged at the lower ends of the plurality of filtering inner lining cylinders 5, the filtering and monitoring mechanism includes a flow velocity monitoring mechanism 6 and a partition mechanism 7, the flow velocity monitoring mechanism 6 includes a flow velocity conversion structure 61, a first monitoring structure 62 and a second monitoring structure, the flow velocity conversion structure 61 is used to convert the kinetic energy of water flow into its own rotational motion, and the first monitoring structure 62 and the second monitoring structure are used to monitor the change of the rotational speed of the flow velocity conversion structure 61; a plurality of partition mechanisms 7 are respectively arranged at the lower ends of the plurality of flow velocity monitoring mechanisms 6.

[0034] Specifically, the water adding component 2 and the detection component 3 both adopt existing technologies, and their structures and working principles have been introduced in detail in the comparative document. The partition mechanism 7 includes a funnel cover 71 and an electric control valve 72. The upper end opening of the funnel cover 71 is covered on the lower end of the filter inner liner 5, and the electric control valve 72 is arranged at the lower end of the funnel cover 71.

[0035] The water sample is pre-stored in the water adding component 2 at the upper end of the rack 1. When it is necessary to filter the water sample, under the action of gravity, the water sample flows out from the lower end of the water adding component 2 and flows into the filter inner liner 5 of the filter table 4. The filter inner liner 5 intercepts the solid debris in the water sample and only allows the substances dissolved in water to continue to flow downward with the water flow. The water sample continues to flow downward and contacts the flow velocity conversion structure 61 in the lower filter monitoring mechanism. The flow velocity conversion structure 61 converts part of the kinetic energy of the water sample into its own rotational motion. At the same time, the first monitoring structure 62 and the second monitoring structure monitor the change of the rotational speed of the flow velocity conversion structure 61 in real time. In the initial stage of filtration, the filter inner liner 5 intercepts less solid debris, and the resistance received by the water sample is the smallest. At this time, the downward flow velocity of the water sample is the fastest. Correspondingly, the rotational speed of the flow velocity conversion structure 61 also reaches the fastest. As the filtration process continues, the solid debris intercepted by the filter inner liner 5 continuously increases, the resistance received by the water sample flowing downward gradually increases, and its flow velocity also gradually decreases, thereby causing the rotational speed of the flow velocity conversion structure 61 to gradually decrease. Once the filter inner liner 5 is damaged, the obstruction of the water sample flowing downward is greatly reduced, and the flow velocity will suddenly increase, which will cause the rotational speed of the flow velocity conversion structure 61 to increase. As long as one of the first monitoring structure 62 and the second monitoring structure detects a change in the flow velocity of the water sample, the partition mechanism 7 arranged at the lower end of the filter monitoring mechanism is activated, and the electric control valve 72 quickly closes, effectively preventing the debris from falling into the detection component 3 at the lower end of the rack 1. During the filtration process, if it is necessary to replace the filter inner liner 5, the filter table 4 can be moved to move the filter inner liner 5 with a new one to directly below the water adding component 2 to achieve rapid replacement. By setting the flow velocity conversion structure 61, the first monitoring structure 62, the second monitoring structure and the partition mechanism 7, the first monitoring structure 62 and the second monitoring structure increase the redundancy of monitoring the rotational speed of the flow velocity conversion structure 61 and timely block the water sample from flowing from the inner liner filter to the detection component 3, thereby avoiding the inflow of debris into the detection component 3 caused by the failure of the detection component 3 to effectively detect the damage of the filter inner liner 5.

[0036] Refer to Figure 3 、 Figure 4 and Figure 5As shown: The flow velocity conversion structure 61 includes two mounting plates 611 and multiple conversion components 612; the two mounting plates 611 are arranged in parallel on both sides of the filter inner liner 5; the multiple conversion components 612 are arranged at equal intervals between the two mounting plates 611, and the multiple conversion components 612 evenly divide the lower end of the filter inner liner 5 into multiple parts.

[0037] If one conversion component 612 is set, all water samples are gathered together and flow towards the conversion component 612. When the breakage of the filter inner liner 5 is small, the change in the flow velocity of the water samples is weak, and the breakage of the filter inner liner 5 cannot be detected in time. Therefore, multiple conversion components 612 are set. After the water samples complete the interception of solid debris through the filter inner liner 5 and continue to flow downward, due to the layout of the multiple conversion components 612, the water samples are dispersed into multiple water flows and flow towards each conversion component 6 on average. Compared with setting only one conversion component 612 to gather all water flows, this dispersed design makes the water flow received by each conversion component 612 relatively small. During the filtering process, if a local breakage occurs in the filter inner liner 5 corresponding to a certain conversion component 612, even if the breakage degree is small, due to the change in the water flow passage in this area, the water flow passing through here will increase significantly, and the flow velocity will also increase accordingly, thereby driving a significant increase in the rotation speed of the corresponding conversion component 612. The first monitoring structure and the second monitoring structure can capture this abnormal change more timely by monitoring the rotation speed of each conversion component 612 in real time, thus improving the sensitivity of the change in the water flow velocity when the filter inner liner 5 is damaged and judging the breakage situation of the filter inner liner 5 in time.

[0038] Refer to Figure 5 and Figure 6 As shown: The conversion component 612 includes a first rotating shaft 6121, conversion fan blades 6122 and a flow concentrating cover 6123; both ends of the first rotating shaft 6121 are rotatably connected to the two mounting plates 611; the conversion fan blades 6122 are sleeved on the first rotating shaft 6121; the flow concentrating cover 6123 is arranged at the upper end of the conversion fan blades 6122, and the flow concentrating cover 6123 is used to gather the water flow within its covered range to the conversion fan blades 6122.

[0039] In the water sample filtration process, after the solid debris is intercepted by the filtration inner cylinder 5, the water sample continues to flow downward. Without the flow concentrating cover 6123, the water sample will fall on the conversion fan blade 6122 disorderly within a large range, resulting in the dispersion of the acting force of the water flow on the conversion fan blade 6122. The torque received by the conversion fan blade 6122 is small, and it is difficult to drive the first rotating shaft 6121 to rotate quickly and significantly. Therefore, a flow concentrating cover 6123 is provided at the upper end of the conversion fan blade 6122. The flow concentrating cover 6123 collects and guides the water samples within its coverage area, making the originally dispersed water flow concentrate and flow towards the conversion fan blade 6122, reducing the contact area between the water flow and the conversion fan blade 6122. When these converged water flows impact the conversion fan blade 6122, the impact force per unit area increases, and the conversion fan blade 6122 receives a stronger rotational acting force, which can quickly drive the first rotating shaft 6121 to rotate. As the flow rate of the water sample changes, the impact force received by the conversion fan blade 6122 will also change accordingly, and the rotational speed of the first rotating shaft 6121 is adjusted accordingly. Through the cooperation of the flow concentrating cover 6123, the conversion fan blade 6122, and the first rotating shaft 6121, the first rotating shaft 6121 can quickly respond to the subtle changes in the flow rate of the water sample, improving the sensitivity of water sample flow rate monitoring.

[0040] Refer to Figure 4 and Figure 7 As shown: The first monitoring structure 62 includes a rotary encoder 621 capable of monitoring the rotational speed of the first rotating shaft 6121. The rotary encoder 621 is used to directly monitor the rotational speed of the first rotating shaft 6121.

[0041] Specifically, there are multiple rotary encoders 621. The multiple rotary encoders 621 correspond to multiple first rotating shafts 6121 respectively. The rotary encoder 621 uses existing technology. The rotary encoder 621 includes a light source and a photosensitive element. The light source is installed on the first rotating shaft 6121, and the photosensitive element is fixed on the mounting plate 611.

[0042] When the conversion component 612 is working, when the water sample converged by the flow concentrating cover 6123 impacts the conversion fan blade 6122 and drives the first rotating shaft 6121 to rotate, at this time, the light source installed on the first rotating shaft 6121 rotates accordingly. During the rotation process, the relative position between the light source and the fixed photosensitive element changes continuously. The light emitted by the light source will be periodically irradiated onto the photosensitive element. The photosensitive element generates corresponding electrical signal changes according to the received light changes. By analyzing and processing these electrical signals, the rotational speed information of the first rotating shaft 6121 can be obtained in real time and accurately. Since multiple rotary encoders 621 correspond to multiple first rotating shafts 6121 respectively, the rotational speeds of the first rotating shafts 6121 in each conversion component 612 can be monitored simultaneously, thus ensuring that the operating state of each conversion component 612 can be accurately grasped.

[0043] Refer to Figure 3and Figure 8 As shown in the figure: The second monitoring structure includes a signal amplification structure 63, a telescopic arm 64, and a trigger assembly 65; the signal amplification structure 63 is used to amplify the rotation speed of the first rotating shaft 6121; the telescopic arm 64 is connected to the signal amplification structure 63, and the telescopic arm 64 extends under the action of centrifugal force and contacts the trigger assembly 65; the trigger assembly 65 is arranged on one side of the telescopic arm 64.

[0044] Specifically, there are multiple second monitoring structures, and the multiple second monitoring structures respectively correspond to multiple first rotating shafts 6121.

[0045] During the water sample filtration process, when the filtration inner liner 5 has a small breakage, the change in the water sample flow rate is weak, and the change in the rotation speed of the first rotating shaft 6121 is not obvious. It may be difficult to detect only by the first monitoring structure 62. At this time, the rotational movement of the first rotating shaft 6121 is transmitted to the telescopic arm 64 through the signal amplification structure 63. The signal amplification structure 63 amplifies the kinetic energy brought by the rotation speed, increasing the centrifugal force received by the telescopic arm 64. As the centrifugal force increases, the telescopic arm 64 begins to extend. When it extends to a certain extent, it contacts the trigger assembly 65 arranged on one side of it. After the trigger assembly 65 is contacted, a trigger signal is generated, indicating that the rotation speed of the first rotating shaft 6121 has changed, and further reflecting that the water sample flow rate is abnormal. Thus, the monitoring of the rotation speed change of the first rotating shaft 6121 is realized, effectively improving the monitoring ability of the subtle rotation speed change of the first rotating shaft 6121.

[0046] Refer to Figure 3 、 Figure 9 and Figure 10 As shown in the figure: The trigger assembly 65 includes a contact switch 651. The contact switch 651 includes a signal generating device 6511, two wires 6512, and a conductive sheet 6513; both ends of the signal generating device 6511 are respectively connected to the two wires 6512; the two wires 6512 are in an open circuit state; the conductive sheet 6513 is connected to the telescopic arm 64, and when the conductive sheet 6513 is between the two wires 6512, the circuit is connected.

[0047] When the environmental monitoring water sample filtering device is in operation, when the rotation speed of the first rotating shaft 6121 is relatively low, the centrifugal force generated by driving the telescopic arm 64 is small. At this time, the telescopic arm 64 is in a contracted state, the conductive sheet 6513 is separated from the two wires 6512, and the entire circuit remains in an open state. No current passes through the signal generating device 6511, and no signal is generated. As the filtering inner cylinder 5 is damaged and the water sample flow rate increases, the rotation speed of the first rotating shaft 6121 increases accordingly, and the kinetic energy transmitted to the telescopic arm 64 increases, causing the centrifugal force on the telescopic arm 64 to increase significantly. Under the action of the centrifugal force, the telescopic arm 64 extends, driving the conductive sheet 6513 connected to it to move. When the telescopic arm 64 extends to a certain extent, the conductive sheet 6513 enters the position between the two wires 6512, connecting the originally disconnected two wires 6512 and making the circuit connected. At this time, current can pass through the signal generating device 6511, and the signal generating device 6511 generates a corresponding signal, indicating that the rotation speed of the first rotating shaft 6121 has changed, thus realizing sensitive monitoring of the change in the rotation speed of the first rotating shaft 6121.

[0048] Refer to Figure 9 and Figure 10 As shown: The trigger assembly 65 further includes a U-shaped frame 652 and two pressing assemblies 653. The two pressing assemblies 653 are respectively arranged at both ends of the U-shaped frame 652. The pressing assembly 653 includes a guide rod 6531 and a second spring 6532; the guide rod 6531 is slidably connected to the U-shaped frame 652, and the wire 6512 is connected to the guide rod 6531; the second spring 6532 is used to apply a thrust to the guide rod 6531 towards the middle of the U-shaped frame 652.

[0049] When the conductive sheet 6513 connects two wires 6512, the conductive sheet 6513 needs to contact the two wires 6512. Therefore, the distance between the ends of the two wires 6512 needs to be controlled to be less than the thickness of the conductive sheet 6513. At this time, when the conductive sheet 6513 moves between the two wires 6512, the wires 6512 can be pressed tightly against the conductive sheet 6513. However, the relatively close distance between the two wires 6512 will interfere with the moving path of the conductive sheet 6513, resulting in a collision between the conductive sheet 6513 and the wires 6512. Therefore, two pressing components 653 are provided. In the initial state, due to the thrust of the second spring 6532, the two guide rods 6531 drive the wires 6512 to approach each other, making the distance between the ends of the two wires 6512 less than the thickness of the conductive sheet 6513. After the conductive sheet 6513 pushes the two guide rods 6531 away from each other, it can ensure that the conductive sheet 6513 contacts the two wires 6512, and the conductive sheet 6513 is elastic and can be slightly deformed. When the rotational speed of the first rotating shaft 6121 increases, the telescopic arm 64 elongates under the centrifugal force and drives the conductive sheet 6513 to move between the two wires 6512. The conductive sheet 6513 will exert an outward force on the two guide rods 6531, forcing the guide rods 6531 to slide along the U-shaped frame 652 against the thrust of the second spring 6532, making the two wires 6512 move away from each other. During this process, the second spring 6532 is compressed and continuously exerts a thrust on the guide rod 6531 towards the conductive sheet 6513 to ensure that the wire 6512 always remains in a tightly pressed state with the conductive sheet 6513 and maintains the circuit connection. When the rotational speed of the first rotating shaft 6121 decreases and the telescopic arm 64 contracts and drives the conductive sheet 6513 to leave, the thrust of the second spring 6532 pushes the guide rod 6531 to reset, making the two wires 6512 approach each other again and return to the initial state waiting to be triggered, thus effectively solving the problem of the wire 6512 interfering with the movement of the conductive sheet 6513 and avoiding a collision between the conductive sheet 6513 and the wire 6512.

[0050] Refer to Figure 9 and Figure 10 As shown in: The pressing component 653 further includes a limiting ring 6533. The limiting ring 6533 is connected to the guide rod 6531, and the limiting ring 6533 is used to limit the distance that the second spring 6532 pushes the guide rod 6531 to move.

[0051] After the conductive sheet 6513 moves away from between the two wires 6512, the two second springs 6532 respectively push the two guide rods 6531 closer to each other. If the moving distance of the guide rods 6531 is not limited, the wires 6512 on the two guide rods 6531 may come into contact with each other, causing the circuit to be connected. Therefore, a limit ring 6533 is fixed on the guide rod 6531. When the telescopic arm 64 contracts and drives the conductive sheet 6513 to move away from between the two wires 6512, the second spring 6532 releases the thrust and pushes the guide rod 6531 towards the middle of the U-shaped frame 652. At this time, the limit ring 6533 connected to the guide rod 6531 moves together with the guide rod 6531. When the limit ring 6533 contacts and abuts against the U-shaped frame 652, the limit ring 6533 hinders the guide rod 6531 from continuing to move, so that the two guide rods 6531 cannot drive the two wires 6512 to move closer further, thus preventing the two wires 6512 from contacting each other and ensuring that the circuit returns to the open state.

[0052] Refer to Figure 8 and Figure 11 As shown: The signal amplification structure 63 includes a second rotating shaft 631 and a speed amplification component 632; the second rotating shaft 631 is arranged in parallel on one side of the first rotating shaft 6121, and the telescopic arm 64 is connected to the second rotating shaft 631; both ends of the speed amplification component 632 are respectively connected to the first rotating shaft 6121 and the second rotating shaft 631.

[0053] Specifically, the speed amplification component 632 can use a gear transmission amplification structure, a lever amplification structure, a belt pulley transmission amplification structure, etc. In this application, a belt pulley transmission amplification structure is adopted. The speed amplification component 632 includes a first transmission pulley 6321, a second transmission pulley 6322 and a synchronous belt 6323. The first transmission pulley 6321 is connected to the first rotating shaft 6121, the second transmission pulley 6322 is connected to the second rotating shaft 631, both ends of the synchronous belt 6323 are respectively sleeved on the first transmission pulley 6321 and the second transmission pulley 6322, and the diameter of the first transmission pulley 6321 is larger than that of the second transmission pulley 6322.

[0054] During the filtration monitoring process of the water sample, when the water sample impacts the conversion fan blade 6122 and drives the first rotating shaft 6121 to rotate, the first transmission wheel 6321 connected to the first rotating shaft 6121 rotates synchronously. The first transmission wheel 6321 transmits the rotational power to the second transmission wheel 6322 through the synchronous belt 6323. Due to the diameter difference between the first transmission wheel 6321 and the second transmission wheel 6322 (assuming the transmission ratio is set to 2), the rotational speed of the second transmission wheel 6322 is amplified compared to that of the first transmission wheel 6321. For example, when the first transmission wheel 6321 rotates one circle, the second transmission wheel 6322 will rotate two circles. The second transmission wheel 6322 then drives the second rotating shaft 631 to rotate at high speed. The rotation of the second rotating shaft 631 directly acts on the telescopic arm 64 connected to it, causing the centrifugal force received by the telescopic arm 64 to increase significantly, thereby achieving the amplification of the rotational speed change signal of the first rotating shaft 6121.

[0055] Refer to Figure 3 and Figure 12 As shown: The telescopic arm 64 includes a sleeve 641, a telescopic rod 642, and a first spring 643; one end of the sleeve 641 is connected to the second rotating shaft 631; the telescopic rod 642 is slidably arranged inside the sleeve 641, and one end of the telescopic rod 642 extends out of the sleeve 641 and is connected to the conductive sheet 6513; the first spring 643 is arranged inside the sleeve 641, and the first spring 643 is used to apply a force towards the inside of the sleeve 641 to the telescopic rod 642.

[0056] In the water sample filtration monitoring process, when the first rotating shaft 6121 rotates due to the impact of the water sample on the conversion fan blade 6122, the rotational speed of the second rotating shaft 631 of the signal amplification structure 63 is amplified under the action of the rotational speed amplification component 632 and starts to rotate at high speed. The sleeve 641 connected to the second rotating shaft 631 rotates at high speed accordingly, driving the telescopic rod 642 and the conductive sheet 6513 to move together. At this time, the telescopic rod 642 is subjected to the centrifugal force, and the direction of this force is away from the rotation center, which is opposite to the direction of the force of the first spring 643 towards the inside of the sleeve 641. As the rotational speed of the second rotating shaft 631 increases, the centrifugal force received by the telescopic rod 642 gradually increases. When it is greater than the elastic force of the first spring 643, the telescopic rod 642 overcomes the resistance of the first spring 643 and slides outward along the sleeve 641 to extend, driving the conductive sheet 6513 to move towards the triggering component 65. When the conductive sheet 6513 moves between the two wires 6512 of the triggering component 65, the circuit is connected, triggering the monitoring signal. When the rotational speed of the second rotating shaft 631 decreases and the centrifugal force decreases, under the elastic force of the first spring 643, the telescopic rod 642 is pulled back into the inside of the sleeve 641, driving the conductive sheet 6513 to reset, and the circuit returns to the open state, thereby effectively transmitting the signal of the rotational speed change of the first rotating shaft 6121 to the triggering component 65.

[0057] The above embodiments merely represent one or several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. An environmental monitoring water sample filtering device with quick filter element replacement, comprising a frame (1), a water adding component (2) and a detection component (3) arranged at the upper and lower ends of the frame (1), characterized in that, It further includes a filtering table (4) and a plurality of filtering monitoring mechanisms; The filtering table (4) is horizontally arranged in the middle of the frame (1) and can reciprocate along its own length direction. A plurality of docking grooves are arranged along the length direction of the filtering table (4), and a filtering inner liner (5) is arranged in each docking groove; The plurality of filtering monitoring mechanisms are respectively arranged at the lower ends of the plurality of filtering inner liners (5). The filtering monitoring mechanism includes a flow velocity monitoring mechanism (6) and a partition mechanism (7). The flow velocity monitoring mechanism (6) includes a flow velocity conversion structure (61), a first monitoring structure (62) and a second monitoring structure. The flow velocity conversion structure (61) is used to convert the kinetic energy of the water flow into its own rotational motion, and the first monitoring structure (62) and the second monitoring structure are used to monitor the change of the rotational speed of the flow velocity conversion structure (61); The plurality of partition mechanisms (7) are respectively arranged at the lower ends of the plurality of flow velocity monitoring mechanisms (6).

2. The environmental monitoring water sample filtering device for quick filter element replacement according to claim 1, characterized in that, The flow velocity conversion structure (61) includes two mounting plates (611) and a plurality of conversion components (612); The two mounting plates (611) are arranged in parallel on both sides of the filtering inner liner (5); The plurality of conversion components (612) are arranged at equal intervals between the two mounting plates (611), and the plurality of conversion components (612) divide the lower end of the filtering inner liner (5) into a plurality of parts.

3. The environmental monitoring water sample filtering device for rapid filter element replacement according to claim 2, characterized in that, The conversion component (612) includes a first rotating shaft (6121), a conversion fan blade (6122) and a flow concentrating cover (6123); Both ends of the first rotating shaft (6121) are rotatably connected to the two mounting plates (611); The conversion fan blade (6122) is sleeved on the first rotating shaft (6121); The flow concentrating cover (6123) is arranged at the upper end of the conversion fan blade (6122), and the flow concentrating cover (6123) is used to gather the water flow within its covered range to the conversion fan blade (6122).

4. A water sample filtering device for environmental monitoring with a quickly replaceable filter element according to claim 3, characterized in that, The first monitoring structure (62) includes a rotary encoder (621) capable of monitoring the rotational speed of the first rotating shaft (6121), and the rotary encoder (621) is used to directly monitor the rotational speed of the first rotating shaft (6121).

5. The environmental monitoring water sample filtering device for rapid filter element replacement according to claim 3, wherein The second monitoring structure includes a signal amplification structure (63), a telescopic arm (64) and a triggering component (65); The signal amplification structure (63) is used to amplify the rotational speed of the first rotating shaft (6121); The telescopic arm (64) is connected to the signal amplification structure (63), and the telescopic arm (64) extends under the action of centrifugal force to contact the triggering component (65); The triggering component (65) is arranged on one side of the telescopic arm (64).

6. The environmental monitoring water sample filtering device for quick filter element replacement according to claim 5, characterized in that, The triggering component (65) includes a contact switch (651), and the contact switch (651) includes a signal generating device (6511), two wires (6512) and a conductive sheet (6513); Both ends of the signal generating device (6511) are respectively connected to the two wires (6512); The two wires (6512) are in an open circuit state; The conductive sheet (6513) is connected to the telescopic arm (64), and when the conductive sheet (6513) is between the two wires (6512), the circuit is connected.

7. A water sample filtering device for environmental monitoring with quick filter element replacement according to claim 6, characterized in that, The triggering component (65) further includes a U-shaped frame (652) and two tightening components (653). The two tightening components (653) are respectively arranged at both ends of the U-shaped frame (652). The tightening component (653) includes a guide rod (6531) and a second spring (6532). The guide rod (6531) is slidably connected to the U-shaped frame (652), and the wire (6512) is connected to the guide rod (6531). The second spring (6532) is used to apply a thrust force to the guide rod (6531) towards the middle of the U-shaped frame (652).

8. The environmental monitoring water sample filtering device for quick filter element replacement according to claim 7, characterized in that, The tightening component (653) further includes a limiting ring (6533). The limiting ring (6533) is connected to the guide rod (6531), and the limiting ring (6533) is used to limit the distance that the second spring (6532) pushes the guide rod (6531) to move.

9. The environmental monitoring water sample filtering device for quick filter element replacement according to claim 5, characterized in that, The signal amplification structure (63) includes a second rotating shaft (631) and a rotational speed amplification component (632). The second rotating shaft (631) is arranged in parallel on one side of the first rotating shaft (6121), and the telescopic arm (64) is connected to the second rotating shaft (631). Both ends of the rotational speed amplification component (632) are respectively connected to the first rotating shaft (6121) and the second rotating shaft (631).

10. A water sample filtering device for environmental monitoring with quick filter element replacement according to claim 9, characterized in that, The telescopic arm (64) includes a sleeve (641), a telescopic rod (642), and a first spring (643). One end of the sleeve (641) is connected to the second rotating shaft (631). The telescopic rod (642) is slidably arranged in the sleeve (641), and one end of the telescopic rod (642) extends out of the sleeve (641) and is connected to the conductive sheet (6513). The first spring (643) is arranged in the sleeve (641), and the first spring (643) is used to apply a force to the telescopic rod (642) towards the inside of the sleeve (641).

Images