A water quality detection device for environmental protection

Abstract

The present invention relates to the field of water quality testing, and discloses a water quality testing device for environmental protection, including a sample separation tank, wherein a plurality of partitions are provided in the sample separation tank, and the partitions separate the sample separation tank into a diversion chamber, a sample separation chamber, a filter chamber and an air inlet chamber. The diversion chamber is connected to a drain pipe, and the sample separation chamber is connected to a sample separation channel. By precisely controlling the movement of the filter frame, gas transportation and liquid flow direction, cross-contamination of water samples is reduced, and the independence and accuracy of water samples of different filtration levels are ensured. At the same time, the design of a detachable filter tank and a replaceable filter screen improves the maintenance convenience and adaptability of the device, and can flexibly replace filter screens of different pore sizes according to detection requirements to adapt to different water quality environments. The design of the device improves the degree of automation of water quality detection pretreatment, reduces manual operation errors and pollution, provides more accurate water sample data for subsequent detection, and enhances the reliability and comprehensiveness of water quality assessment.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection, and in particular to a water quality detection device for environmental protection. Background Art

[0002] With the acceleration of industrialization, water environmental protection has become a key concern of society. Water quality testing technology is widely used to ensure water resource security and assess water pollution, especially in the fields of water source protection, drinking water safety, and industrial wastewater discharge control.

[0003] In the water quality testing process, post-sampling water pretreatment is a critical step influencing the accuracy and reliability of test results. Water samples often contain impurities such as suspended matter, sediment, algae, and microorganisms, which can interfere with testing instruments, leading to errors and instability. Therefore, minimizing the impact of impurities in water samples is a key issue in the design of water quality testing equipment.

[0004] Extracting liquids with different degrees of filtration allows for a more comprehensive analysis of contaminants in water. Coarse filtration removes large particles and is suitable for analyzing total suspended solids, while fine filtration removes fine particles, helping to detect dissolved pollutants and fine contaminants such as microplastics.

[0005] Existing pre-treatment filtration devices for water quality testing typically only perform a single level of filtration and are unable to simultaneously extract liquids with different levels of filtration. This limits the comprehensive analysis of dissolved and suspended pollutants, affecting the accuracy of water quality testing. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a water quality detection device for environmental protection that can extract liquids with different filtration degrees, aiming to alleviate the above-mentioned problems at least to a certain extent.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A water quality detection device for environmental protection, comprising:

[0009] Sampling tank;

[0010] A plurality of partitions are provided in the sample separation tank, the partitions separating the sample separation tank into a diversion chamber, a sample separation chamber, a filter chamber and an air inlet chamber, the diversion chamber is connected to a drain pipe, and the sample separation chamber is connected to a sample separation channel;

[0011] A filter tank is provided on the sample separation tank, the filter tank is detachably connected to the sample separation tank, a plurality of filter ports are provided on the filter tank, a filter frame is provided on the outer wall of the filter tank, a plurality of filter screens with different apertures are provided on the filter frame, and the apertures of the plurality of filter screens gradually decrease from bottom to top;

[0012] A positioning platform is provided on the outer wall of the sample separation tank, wherein a plurality of positioning openings are provided on the positioning platform, and sample separation test tubes are provided in the positioning openings, wherein one of the sample separation test tubes corresponds to the sample separation channel;

[0013] A filter component is provided between the sample separation tank and the filter tank, and is used to convey gas to the filter cavity to form a positive pressure to force the liquid to enter the filter tank through the filter port;

[0014] A conveying component provided between the filter tank and the filter cavity, for forming a negative pressure in the filter tank to convey the liquid into the diversion cavity;

[0015] The positioning component provided on the positioning platform is used for positioning the sample separation tube in the positioning port when the filter canister is buckled onto the sample separation canister.

[0016] Preferably, the filter component includes a push plate arranged in the air inlet cavity, the push plate is slidably connected to the air inlet cavity, the inner wall of the air inlet cavity is provided with a plurality of air inlets a connected to the outside, the height of the air inlet a is higher than the push plate, the bottom of the filter cavity is provided with an air inlet b connected to the air inlet cavity, a piston is slidably connected in the air inlet b, and a spring a is connected between the piston and the air inlet b.

[0017] Preferably, the filter component further comprises a motor connected to the air inlet cavity, a screw a is connected to the rotating shaft of the motor, the screw a is a reciprocating screw, and the push plate is threadedly connected to the screw a.

[0018] Preferably, the filter component can move downwards a preset distance of the filter frame each time a preset amount of gas is delivered, so that a filter screen with another aperture corresponds to the filter port;

[0019] The filter component also includes a connecting shaft rotatably connected to the bottom of the filter chamber, the connecting shaft passes through the filter chamber and the push plate and extends to the bottom of the push plate, the connecting shaft is connected to a conduit, the outer wall of the conduit is provided with a guide groove, the bottom of the push plate is connected to a guide rod slidably connected to the guide groove, a gear a is provided on the top of the connecting shaft, a ratchet mechanism is provided between the gear a and the connecting shaft, a screw b is rotatably connected in the filter chamber, the screw b is a reciprocating screw, a gear b meshing with the gear a is connected to the screw b, a push rod is threadedly connected to the screw b, one end of the push rod is a magnet, which is magnetically attracted to the filter frame, and the gear a is an incomplete gear.

[0020] Preferably, the conveying component includes an extraction chamber opened in the filter tank, the outer wall of the extraction chamber is provided with a plurality of diversion ports connected to the diversion chamber, a volute is provided in the extraction chamber, the bottom of the volute is connected to an extraction pipe extending to one side of the filter port, and an impeller is provided in the volute.

[0021] Preferably, the delivery component is capable of extracting the liquid in the filter tank into the diversion cavity when the filter component is working;

[0022] The conveying component also includes a driving shaft connected to the impeller, the bottom of the driving shaft extends to the bottom of the filter tank and is connected to a connecting piece a, the top of the screw a extends into the filter chamber and is connected to a connecting piece b, the part of the screw a extending into the filter chamber is a non-threaded part, the top of the connecting piece b is connected to a spring telescopic rod, and a limiting slide groove is provided at the bottom of the connecting piece a, and one end of the spring telescopic rod extends into the limiting slide groove.

[0023] Preferably, whenever the filter support moves downward by a preset distance a, the liquid can enter the sample separation chamber and be transported into the sample separation channel;

[0024] The bottom of the diversion chamber is provided with multiple liquid inlets connected with the sample dividing chamber, and a push ring is slidably connected in the sample dividing chamber, and the top of the push ring is connected with a connecting rod a, and the connecting rod b is slidably connected in the connecting rod a, and the top of the connecting rod b is connected with a baffle for closing the liquid inlet, and the inner wall of the sample dividing chamber is connected with a baffle located at the bottom of the baffle, and there is a distance between the baffle and the baffle, and wedge-shaped openings are respectively provided on both sides of the interior of the connecting rod a, and a wedge-shaped strip adapted to the wedge-shaped opening is slidably connected on the connecting rod b, and a spring b is connected between the wedge strip and the connecting rod b, and the bottom of the push ring is connected with a connecting frame, and the top of the screw b extends into the sample dividing chamber and is connected with a screw c, and the screw c is a reciprocating screw.

[0025] Preferably, the positioning component includes a connecting port opened on the positioning platform, the connecting port is communicated with the positioning port, a positioning block is slidably connected in the connecting port, a connecting plate is slidably connected in the connecting port, the top of the connecting plate is connected to a top contact strip, which is located on one side of the positioning block, a spring c is provided between the positioning block and the connecting port, and between the connecting plate and the connecting port, a connecting rod a is connected to one side of the connecting plate, a connecting rod b is slidably connected to the sample separating tank, a spring d is connected between the connecting rod b and the sample separating tank, a pressure ring is connected to the top of the connecting rod a, and a ball in contact with the pressure ring is connected to the bottom of the connecting rod b.

[0026] Preferably, a connecting ring is connected to the top cover of the filter tank, and the connecting ring is threadedly connected to the sample separation tank.

[0027] Preferably, whenever the filter holder moves downward by a preset distance b, the positioning platform can rotate by a preset angle so that another sample separation tube corresponds to a sample separation channel, and the preset distance b is shorter than the preset distance a.

[0028] A gear c is connected to the bottom of the positioning platform, a transmission shaft is rotatably connected to the sample separation tank, one end of the lead screw b extends to the bottom of the push plate, and a chain is connected to the transmission shaft, and a gear d adapted to the gear c is connected to the transmission shaft, and the gear d is an incomplete gear.

[0029] In summary, the present invention mainly has the following beneficial effects:

[0030] This application realizes efficient multi-stage filtration and synchronous sampling of water samples by setting up multi-stage filter screens and adjustable filter racks, and can extract liquids with different filtration degrees at the same time. This design improves the filtration efficiency through the combined action of positive and negative pressure, avoids the uneven flow rate caused by gravity, and ensures the smooth progress of each filtration stage. By precisely controlling the movement of the filter rack, gas delivery and liquid flow direction, the cross-contamination of water samples is reduced, and the independence and accuracy of water samples of different filtration levels are ensured. At the same time, the design of a detachable filter tank and replaceable filter screen improves the maintenance convenience and adaptability of the device, and can flexibly replace filter screens of different pore sizes according to detection requirements to adapt to different water quality environments. The design of this device improves the degree of automation of water quality detection pretreatment, reduces manual operation errors and pollution, provides more accurate water sample data for subsequent detection, and enhances the reliability and comprehensiveness of water quality assessment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a cross-sectional schematic diagram of the overall structure of the present invention;

[0033] Figure 3 yes Figure 2 A magnified schematic diagram of the local structure at point A;

[0034] Figure 4 yes Figure 2 A magnified schematic diagram of the local structure at point B in the middle;

[0035] Figure 5 It is a schematic structural diagram of the ratchet mechanism of the present invention;

[0036] Figure 6 is a schematic diagram of the catheter structure of the present invention;

[0037] Figure 7 It is a schematic diagram of the push ring structure of the present invention;

[0038] Figure 8 It is a cross-sectional schematic diagram of the structure of the connecting rod a and the connecting rod b of the present invention;

[0039] Figure 9 Schematic diagram of the structure of the connecting piece a and the connecting piece b of the present invention;

[0040] Figure 10 It is a cross-sectional schematic diagram of the sample separation tank and the filter tank structure of the present invention.

[0041] Reference numerals:

[0042] 100, sample separation tank; 101, partition; 102, diversion chamber; 103, sample separation chamber; 104, filter chamber; 105, air inlet chamber; 106, drain pipe; 107, sample separation channel; 108, filter tank; 109, filter port; 110, filter holder; 111, positioning platform; 112, positioning port; 113, sample separation tube; 114, connecting ring;

[0043] 200, push plate; 201, air inlet a; 202, air inlet b; 203, piston; 204, spring a; 205, motor; 206, lead screw a; 207, connecting shaft; 208, guide tube; 209, guide groove; 210, guide rod; 211, gear a; 212, ratchet mechanism; 213, lead screw b; 214, gear b; 215, push rod; 216, magnet;

[0044] 300, extraction chamber; 301, diversion port; 302, volute; 303, extraction pipe; 304, impeller; 305, drive shaft; 306, connecting piece a; 307, connecting piece b; 308, spring telescopic rod; 309, limiting slide;

[0045] 400, liquid inlet; 401, push ring; 402, connecting rod a; 403, connecting rod b; 404, baffle; 405, baffle; 406, wedge-shaped opening; 407, wedge-shaped strip; 408, spring b; 409, connecting frame; 410, lead screw c;

[0046] 500, connecting port; 501, positioning block; 502, connecting plate; 503, top contact strip; 504, spring c; 505, connecting rod a; 506, connecting rod b; 507, spring d; 508, pressure ring; 509, ball bearing; 510, gear c; 511, transmission shaft; 512, gear d; 513, chain. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] refer to Figures 1-10 , a water quality detection device for environmental protection, comprising:

[0049] Sampling tank 100;

[0050] A plurality of partitions 101 are provided in the sample separation tank 100. The partitions 101 separate the sample separation tank 100 into a diversion chamber 102, a sample separation chamber 103, a filter chamber 104, and an air inlet chamber 105. The diversion chamber 102 is connected to a drain pipe 106, and the sample separation chamber 103 is connected to a sample separation channel 107.

[0051] A filter tank 108 is provided on the sample separation tank 100. The filter tank 108 is detachably connected to the sample separation tank 100. The filter tank 108 is provided with a plurality of filter ports 109. A filter support 110 is provided on the outer wall of the filter tank 108. The filter support 110 is provided with a plurality of filter screens of different pore sizes. The pore sizes of the plurality of filter screens gradually decrease from bottom to top.

[0052] A positioning platform 111 is provided on the outer wall of the sample separation tank 100 , and a plurality of positioning openings 112 are provided on the positioning platform 111 . Sample separation test tubes 113 are provided in the positioning openings 112 , and one of the sample separation test tubes 113 corresponds to the sample separation channel 107 ;

[0053] A filter component is provided between the sample separation tank 100 and the filter tank 108, for conveying gas to the filter chamber 104 to form a positive pressure to force the liquid to enter the filter tank 108 through the filter port 109;

[0054] A conveying component provided between the filter tank 108 and the filter cavity 104 , used for forming a negative pressure in the filter tank 108 to convey the liquid into the diversion cavity 102 ;

[0055] The positioning component provided on the positioning platform 111 is used to position the sample separation tube 113 in the positioning port 112 when the filter tank 108 is buckled onto the sample separation tank 100;

[0056] The filter component can intermittently deliver gas to the filter cavity 104 , and can move the filter frame 110 downward by a preset distance each time a preset amount of gas is delivered, so that a filter screen of another caliber corresponds to the filter port 109 ;

[0057] Whenever the filter support 110 moves downward by a preset distance a, the liquid can enter the sample separation chamber 103 and be transported to the sample separation channel 107;

[0058] The conveying component is capable of extracting the liquid in the filter tank 108 into the diversion cavity 102 when the filtering component is working;

[0059] Wherein, whenever the filter holder 110 moves downward by a preset distance b, the positioning platform 111 can rotate by a preset angle so that another sample-dividing test tube 113 corresponds to the sample-dividing channel 107 , and the preset distance b is shorter than the preset distance a.

[0060] By setting up the sample separation tank 100, when in use, the operator can put the water sample that needs to be tested taken from the river into the sample separation tank 100, and the filter chamber 104 provided therefor will store it and wait for pretreatment. The filter tank 108 that cooperates with the sample separation tank 100 is snapped onto the sample separation tank 100, and the filter frame 110 and the filter port 109 on the filter tank 108 reach the filter chamber 104. Specifically, under the action of the filter component, the gas is intermittently delivered to the filter chamber 104, forming a positive pressure to push the liquid through the filter port 109 into the filter tank 108. At the same time, the delivery component forms a negative pressure inside the filter tank 108, and delivers the liquid to the diversion chamber 102. The positive pressure effect can effectively reduce the resistance of the liquid when it passes through the filter port 109, speed up the filtration speed, and avoid uneven flow rate caused by gravity, while the negative pressure effect can further guide the flow of the liquid. Such a setting can form a combined positive and negative pressure effect during the liquid filtration process, improve the filtration efficiency and ensure the smooth progress of different filtration stages. After the conveying component conveys the liquid into the diverter chamber 102, part of the liquid will flow out from the drain pipe 106 to avoid the pressure imbalance caused by excessive liquid. When the filter component conveys a preset amount of gas to the filter chamber 104, it means that a sufficient amount of liquid passes through the first section of the filter screen (the filter screen with the largest pore size) into the filter tank 108 and is conveyed into the diverter chamber 102. At this time, the filter holder 110 can be moved downward to a preset position so that the second section of the filter screen (with a pore size slightly smaller than the first section of the filter screen) will follow the filter holder 110 and move downward to a preset distance b. During this process, the positioning platform 111 can rotate, allowing the multiple sample tubes 113 on it to alternate positions, so that another sample tube 113 corresponds to the sample channel 107. And the liquid in the diverter chamber 102 can flow into the sample chamber 103 and be conveyed into the sample channel 107. At this time, the liquid filtered by the first section of the filter screen can be released into one of the sample tubes 113. It is worth noting that the purpose of connecting the diverter chamber 102 to the drain port is that, since the conveying component is in continuous operation, the volume of the sample-dividing test tube 113 cannot accommodate the liquid continuously conveyed by the conveying component. Therefore, after the liquid in the diverter chamber 102 enters the sample-dividing chamber 103 and fills the sample-dividing chamber 103, a portion of the liquid will flow out of the drain port. In addition, after the sample-dividing chamber 103 is filled with liquid filtered by the first filter screen, the sample-dividing chamber 103 will be closed. Even if the filter holder 110 is moved and liquids of different filtration levels are also conveyed to the diverter chamber 102, this portion of liquid will flow out of the drain port, ensuring that the liquid in the sample-dividing test tube 113 that has been completed will not be disturbed by the subsequent filtered liquid, thereby ensuring the independence and accuracy of water samples of different filtration levels. When the filter holder 110 continues to move downward to the preset distance a, so that the second section of the filter screen corresponds to the filter port 109, the filter component again delivers gas to the filter chamber 104, pushing the water sample through the second section of the filter screen into the filter tank 108, and enters the diversion chamber 102 under the action of the delivery component.At this time, the positioning table 111 rotates so that another vacant sample separation test tube 113 corresponds to the sample separation channel 107, ensuring that water samples of different filtration levels are stored in different test tubes. As the filter rack 110 moves further downward, the third section of the filter screen (with a smaller aperture than the second section of the filter screen) gradually aligns with the filter port 109, and continues the same filtering, conveying, and sample separation process. After each filtration stage is completed, the sample separation chamber 103 will automatically close to prevent the newly entered liquid from mixing with the stored water sample, and the excess liquid will still flow out through the drain port to maintain the pressure balance of the system. This multi-stage filtration and sample separation process continues until all the filter screens complete the filtration in turn, and each sample separation test tube 113 stores water samples of the corresponding filtration level. The design of the device can efficiently complete multi-stage filtration and synchronous sample separation in the same device, improve the degree of automation of water quality detection pretreatment, and avoid the errors and pollution problems caused by manual replacement of filter screens and sample separation containers in traditional methods. By precisely controlling the movement of the filter holder 110, gas delivery, and liquid flow, not only can the cross-contamination of water samples be reduced, but also the purity of filtered liquids at all levels can be ensured, providing more accurate water sample data for subsequent testing, and improving the reliability and comprehensiveness of water quality assessment. Furthermore, the filter holder 110 and the filter screen are arranged on the filter tank 108, and the filter tank 108 and the sample separation tank 100 are arranged to be detachably connected, so that the filter tank 108 can be easily disassembled after completing the filtration and sampling, which is convenient for the operator to replace the filter screen and clean the impurities remaining inside the filter tank 108, thereby improving the maintenance convenience of the device. In addition, the detachable design allows different filter screen combinations to be flexibly replaced according to the detection requirements, such as replacing filter screens of different pore sizes to adapt to the detection requirements of different water quality environments, thereby improving the scope of application of the device. Compared with the water quality detection pretreatment filtration device in the prior art, which can usually only perform a single degree of filtration, the present application can achieve the simultaneous extraction of liquids with different filtration degrees by providing a multi-stage filter screen and an adjustable filter holder 110. This setup allows the device to filter water samples at varying levels of coarseness and fineness, enabling a comprehensive analysis of suspended and dissolved pollutants in the water.

[0061] As a further embodiment of the present invention, the filter component includes a push plate 200 disposed in the air inlet cavity 105, the push plate 200 being slidably connected to the air inlet cavity 105, the inner wall of the air inlet cavity 105 being provided with a plurality of air inlets a201 communicating with the outside, the height of the air inlets a201 being higher than the push plate 200, the bottom of the filter cavity 104 being provided with an air inlet b202 communicating with the air inlet cavity 105, a piston 203 being slidably connected to the air inlet b202, and a spring a204 being connected between the piston 203 and the air inlet b202;

[0062] By providing piston 203, in its initial state, piston 203 seals air inlet b202. Spring a204 restricts the position of piston 203, ensuring that it remains sealed. Specifically, push plate 200 can be moved upward, gradually moving upward to cover air inlet a201. This creates positive pressure within air inlet chamber 105. This positive pressure forces gas to push piston 203, compressing spring a204, opening air inlet b202 and allowing gas to enter filter chamber 104 through air inlet b202. As push plate 200 begins to return downward, the positive pressure within air inlet chamber 105 gradually decreases, weakening the pushing force of the gas. At this point, the restoring force of spring a204 takes effect, pushing piston 203 downward and gradually closing air inlet b202. Once piston 203 completely closes air inlet b202, gas flow is cut off, and the system returns to its initial state, ready for the next gas delivery. The cooperation between the push plate 200 and the piston 203 ensures the precise control of the gas input, so that each gas delivery can be carried out according to the predetermined pressure and quantity. After the push plate 200 moves up and down a preset number of times, it can accurately deliver a preset amount of gas to the filter chamber 104, and can cooperate with the subsequent movement of the filter frame 110.

[0063] As a further embodiment of the present invention, the filter component further comprises a motor 205 connected to the air inlet chamber 105, a screw a206 is connected to the rotating shaft of the motor 205, the screw a206 is a reciprocating screw, and the push plate 200 is threadedly connected to the screw a206;

[0064] By providing a motor 205 to drive the lead screw a206, precise reciprocating motion of the push plate 200 is achieved. The motor 205 drives the lead screw a206 to rotate via the drive shaft 305, causing the push plate 200 to reciprocate along a predetermined track under the guidance of the lead screw a206. The reciprocating motion of the lead screw a206 can precisely control the up and down movement of the push plate 200, ensuring that the amount of gas input each time meets the predetermined requirements. This structure makes the movement of the push plate 200 more stable and controllable. The drive of the motor 205 can achieve precise control of the push plate 200, avoiding the instability caused by mechanical errors or manual adjustments. The threaded connection between the push plate 200 and the lead screw a206 can ensure the stability of the push plate 200 during operation. In addition, by injecting gas into the filter chamber 104, not only can positive pressure be applied to the filter chamber 104 to increase the efficiency of liquid passing through the filter screen, but it can also disturb the liquid to be treated in the filter chamber 104 and even disturb liquid that may have precipitated. This allows each particle to be effectively filtered when the liquid passes through filters of different pore sizes. This ensures that each stage of filtration is highly efficient and does not affect the graded filtration effect due to particle deposition or aggregation.

[0065] As a further solution of the present invention, the filter component also includes a connecting shaft 207 rotatably connected to the bottom of the filter chamber 104, the connecting shaft 207 passes through the filter chamber 104 and the push plate 200 and extends to the bottom of the push plate 200, the connecting shaft 207 is connected to a guide tube 208, the outer wall of the guide tube 208 is provided with a guide groove 209, the bottom of the push plate 200 is connected to a guide rod 210 slidably connected to the guide groove 209, and the top of the connecting shaft 207 is provided with a guide rod 210 slidably connected to the guide groove 209. There is a gear a211, and a ratchet mechanism 212 is provided between the gear a211 and the connecting shaft 207. A screw b213 is rotatably connected in the filter chamber 104. The screw b213 is a reciprocating screw. A gear b214 meshing with the gear a211 is connected to the screw b213. A push rod 215 is threadedly connected to the screw b213. One end of the push rod 215 is a magnet 216, which is magnetically attracted to the filter holder 110. The gear a211 is an incomplete gear.

[0066] By setting a guide rod 210, the guide rod 210 can be driven to move in a straight line when the push plate 200 moves upward. The guide rod 210 cooperates with the guide groove 209, and the guide tube 208 can rotate to a certain extent when the guide rod 210 moves upward. At this time, the connecting shaft 207 can rotate and then the gear a211 can be rotated through the ratchet mechanism 212. When the guide rod 210 moves downward with the push plate 200, the guide tube 208 and the connecting shaft 207 can be reset and rotated by cooperating with the guide groove 209. At this time, the ratchet mechanism 212 plays a unidirectional rotation role, allowing the connecting shaft 207 to idle on the inner wall of the gear a211, that is, when the push plate 200 moves up and down one round trip, it will only cause the gear a211 to rotate by a preset angle. Gear a211 is an incomplete gear. When push plate 200 reciprocates up and down a preset number of times, gear a211 meshes with gear b214, causing screw b213 to rotate. This, in turn, allows push rod 215 to move filter holder 110 downward a preset distance through magnetic attraction with filter holder 110, allowing the filter screen of a different aperture to correspond to the position of filter port 109 and ensuring smooth multi-stage filtration. Subsequently, after push rod 215 moves downward and filter holder 110 moves to its limit position, allowing the filter screen with the smallest aperture to correspond to filter port 109, motor 205 continues to operate. With push plate 200 continuing to reciprocate up and down, screw b213, as a reciprocating screw, allows push rod 215 to move upward to its initial position, facilitating the next stage of filtration of the sample liquid.

[0067] As a further embodiment of the present invention, the conveying component includes an extraction chamber 300 opened in the filter tank 108, and the outer wall of the extraction chamber 300 is provided with a plurality of diversion ports 301 communicating with the diversion chamber 102. A volute 302 is provided in the extraction chamber 300, and the bottom of the volute 302 is connected to an extraction pipe 303 extending to one side of the filter port 109. An impeller 304 is provided in the volute 302.

[0068] By providing impeller 304, impeller 304 can be rotated during use. The rotation of impeller 304 within volute 302 creates a negative pressure within volute 302. This negative pressure draws liquid from canister 108 and extracts it through extraction tube 303, ensuring that the filtered liquid is promptly removed. The design of volute 302 helps efficiently guide liquid flow toward extraction tube 303, while ensuring stable liquid flow during the filtration process, avoiding uneven flow rates caused by liquid accumulation or excessive resistance, thereby improving the efficiency and accuracy of the entire filtration system.

[0069] As a further solution of the present invention, the conveying component also includes a drive shaft 305 connected to the impeller 304, the bottom of the drive shaft 305 extends to the bottom of the filter tank 108 and is connected to a connecting piece a306, the top of the screw a206 extends into the filter chamber 104 and is connected to a connecting piece b307, the portion of the screw a206 extending into the filter chamber 104 is a non-threaded portion, the top of the connecting piece b307 is connected to a spring telescopic rod 308, the bottom of the connecting piece a306 is provided with a limiting slide groove 309, and one end of the spring telescopic rod 308 extends into the limiting slide groove 309;

[0070] By providing the connecting piece a306, after the filter canister 108 is inserted into the filter chamber 104 and fixed to the sample separation tank 100, the connecting piece a306 is located on top of the connecting piece b307, and the spring telescopic rod 308 is inserted into the limiting chute 309. When the motor 205 subsequently operates to rotate the lead screw a206, while the push plate 200 reciprocates up and down to inject air into the filter chamber 104, the rotation of the lead screw a206 drives the connecting piece b307 and the spring telescopic rod 308 to rotate. After the spring telescopic rod 308 engages with the limiting chute 309 and slides to the end of the limiting chute 309, it drives the connecting piece b307 and the drive shaft 305 to rotate, thereby enabling the impeller 304 to rotate during the upward and downward movement of the push plate 200. Therefore, during the filtration process, the rotation of the impeller 304 helps to extract liquid and push it to flow into the diversion chamber 102. This linkage design also effectively balances system pressure and flow. When the push plate 200 generates positive pressure to push the liquid through the filter screen, the rotation of the impeller 304 helps extract the liquid, preventing excessive pressure from accumulating within the canister 108 while effectively controlling the flow and storage volume of the liquid. This not only prevents equipment damage but also improves system stability. Furthermore, due to the potential angular uncertainty of the connecting piece a306 at the bottom of the canister 108 during insertion, the spring telescopic rod 308 may not accurately mate with the limiting chute 309. To address this issue, the retractable nature of the spring telescopic rod 308 can be utilized. Even if the spring telescopic rod 308 does not fully mate with the limiting chute 309 in the initial state, the compression of the connecting piece a306 upon insertion causes it to contract and store a certain amount of potential energy. As the lead screw a206 rotates, the reciprocating up and down motion of the push plate 200 drives the connecting piece b307 to rotate, causing the spring telescopic rod 308 to gradually mate with the limiting chute 309 during rotation. Finally, the spring telescopic rod 308 will be snapped into the limiting slide groove 309, ensuring the precise fit between the components and avoiding the influence of angle uncertainty.

[0071] As a further solution of the present invention, the bottom of the diversion chamber 102 is provided with a plurality of liquid inlets 400 connected to the sample chamber 103, a push ring 401 is slidably connected in the sample chamber 103, the top of the push ring 401 is connected to a connecting rod a402, a connecting rod b403 is slidably connected in the connecting rod a402, the top of the connecting rod b403 is connected to a baffle 404 for closing the liquid inlet 400, the inner wall of the sample chamber 103 is connected to a baffle 405 located at the bottom of the baffle 404, the baffle There is a distance between the sheet 405 and the baffle 404. Wedge-shaped openings 406 are respectively provided on both sides of the interior of the connecting rod a402. A wedge-shaped strip 407 adapted to the wedge-shaped opening 406 is slidably connected to the connecting rod b403. A spring b408 is connected between the wedge-shaped strip 407 and the connecting rod b403. The bottom of the push ring 401 is connected to a connecting frame 409. The top of the lead screw b213 extends into the sample dividing chamber 103 and is connected to a lead screw c410. The lead screw c410 is a reciprocating lead screw.

[0072] By providing spring b408, its potential energy allows wedge strip 407 to squeeze wedge opening 406, creating a certain frictional force between wedge opening 406 and support baffle 404, allowing baffle 404 to seal liquid inlet 400. When impeller 304 rotates to deliver liquid into extraction chamber 300, the liquid flows into diversion chamber 102 through diversion opening 301. While liquid inlet 400 is closed, the portion of liquid extracted from the first section flows out of the discharge port. When screw b213 rotates, causing push rod 215 to move filter holder 110 downward, screw c410 rotates with screw b213, allowing connecting frame 409 to drive push ring 401 downward. During this process, utilizing the different lengths and pitches of screw b213 and screw c410, the push ring 401 moves downward before the filter support 110 drives the first filter section, but before it completely leaves the filter opening 109. The wedge strip 407 cooperates with the wedge-shaped opening 406 to move the baffle 404, opening the liquid inlet 400. This allows the liquid filtered by the first filter section to enter the sample separation chamber 103. When the filter support 110 moves downward, allowing the second filter section to reach the filter opening 109 but before it stops moving, the filter support 110 moves to its limit position on screw c410 and begins to return upward. This allows the baffle 404 to promptly close the liquid inlet 400, preventing liquid from different filter sections from entering the sample separation chamber 103. This design ensures that the cooperation between the baffle 404 and the liquid inlet 400 ensures that the liquid in the sample separation chamber 103 is only diverted as needed during the movement of the filter support 110, preventing cross-mixing of liquid from different filter sections. Furthermore, when the push ring 401 moves upward and the liquid inlet 400 is closed by the baffle 404, the movement of the push ring 401 can push the liquid in the sample separation chamber 103, allowing the liquid to flow into the sample separation test tube 113 through the diversion channel. Through the precise control of the push ring 401, the flow path of the liquid can be effectively guided, ensuring that the liquid is processed efficiently and accurately within the sample separation chamber 103. In addition, connecting rods a402 and b403 are provided between the push ring 401 and the baffle 404 to ensure that the liquid inlet 400 is opened promptly when the push ring 401 moves downward, and closed promptly when the push ring 401 moves upward. Specifically, spring b408 provides enough force to squeeze the wedge-shaped strip 407 against the wedge-shaped opening 406, thereby forming a certain friction force. When the push ring 401 moves downward, the linkage of the connecting rod a402 and the connecting rod b403 can effectively push the baffle 404 downward, thereby opening the liquid inlet 400.When the baffle 404 reaches the position of the baffle 405, due to its obstruction, the push ring 401 continues to move downward. The kinetic force of the push ring 401 overcomes the potential energy of the spring b408 and the friction between the wedge-shaped opening 406 and the wedge strip 407, causing the spring b408 to be compressed and the wedge strip 407 to disengage from the wedge-shaped opening 406, thereby releasing the follow-up fit between the push ring 401 and the baffle 404. When the push ring 401 begins to move upward, the friction force again comes into play. The contact friction between the wedge strip 407 and the wedge-shaped opening 406 enables the push ring 401 and the baffle 404 to move synchronously, ensuring that the liquid inlet 400 is closed in a timely manner when needed. The entire process utilizes the elasticity of the spring b408 and the friction between the wedge strip 407 and the wedge-shaped opening 406 to ensure the rapid opening and closing and stable control of the liquid inlet 400. The purpose of this design is to ensure that the liquid can be effectively divided and quantified at different processing stages, thereby avoiding unnecessary leakage or mixing and improving the accuracy and reliability of sample separation.

[0073] As a further solution of the present invention, the positioning component includes a connecting port 500 opened on the positioning platform 111, the connecting port 500 is communicated with the positioning port 112, a positioning block 501 is slidably connected in the connecting port 500, a connecting plate 502 is slidably connected in the connecting port 500, a top contact strip 503 is connected to the top of the connecting plate 502, which is located on one side of the positioning block 501, a spring c504 is provided between the positioning block 501 and the connecting port 500, and between the connecting plate 502 and the connecting port 500, a connecting rod a505 is connected to one side of the connecting plate 502, a connecting rod b506 is slidably connected to the sample separation tank 100, a spring d507 is connected between the connecting rod b506 and the sample separation tank 100, a pressure ring 508 is connected to the top of the connecting rod a505, and a ball 509 in contact with the pressure ring 508 is connected to the bottom of the connecting rod b506;

[0074] By setting the connecting rod b506, when the filter tank 108 is buckled on the sample separation tank 100, the top cover of the filter tank 108 can press the connecting rod b506, and the pressure ring 508 and the connecting rod a505 can be moved downward through the connecting rod b506 and the ball 509. When the connecting rod a505 moves downward, it can drive the connecting plate 502 and the top contact strip 503 to move downward. When the top contact strip 503 moves, it can squeeze the position of the positioning block 501, allowing the positioning block 501 to slide along the connecting port 500 and move closer to the sample separation tube 113. During the movement of the positioning block 501, it will eventually contact the sample separation tube 113 and squeeze and fix the sample separation tube 113, thereby ensuring the stability and accuracy of the sample separation tube 113 during the entire operation process. The purpose of this arrangement is to ensure that the combination of the filter tank 108 and the sample separation tank 100 can effectively push the positioning block 501 to complete precise positioning and fixing work through the linkage of the connecting rod b506, the ball 509, the connecting rod a505 and other components, thereby improving the fixing effect of the sample separation tube 113 and ensuring the accuracy and consistency of the sample separation operation.

[0075] As a further solution of the present invention, a connecting ring 114 is connected to the top cover of the filter tank 108, and the connecting ring 114 is threadedly connected to the sample separation tank 100;

[0076] By providing a connecting ring 114 that is threadedly connected to the sample separation tank 100, a detachable connection between the top cover of the filter tank 108 and the sample separation tank 100 can be achieved. This structure allows the filter tank 108 to be easily disassembled when it needs to be replaced or cleaned, without the need for complicated tools or operations. At the same time, the threaded connection can ensure a tight connection and prevent problems such as loosening or leakage during use. The advantages of the detachable connection are that, first, it can provide convenient maintenance and replacement operations, and secondly, the threaded connection has strong stability, which can effectively ensure the sealing and firmness between the filter tank 108 and the sample separation tank 100 during operation.

[0077] As a further embodiment of the present invention, a gear c510 is connected to the bottom of the positioning platform 111, a transmission shaft 511 is rotatably connected to the sample separation tank 100, one end of the lead screw b213 extends to the bottom of the push plate 200, and a chain 513 is connected to the transmission shaft 511. The transmission shaft 511 is connected to a gear d512 adapted to the gear c510, and the gear d512 is an incomplete gear.

[0078] By coordinating gears c510 and d512, the positioning platform 111 can rotate by a preset angle when the filter holder 110 moves downward by a preset distance b (i.e., before the filter holder 110 has moved and the next filter screen is mated with the filter port 109 and the push ring 401 has moved downward to its limit and is about to return upward), allowing the positioning platform 111 to accurately align with the next sample tube 113 in the sample channel 107. Specifically, the coordination between gears c510 and d512 drives the positioning platform 111 to rotate via the drive shaft 511, further ensuring that each time the filter holder 110 moves downward and reaches the preset distance b, the positioning platform 111 automatically adjusts its angle to accurately position the next sample tube 113 in the corresponding sample channel 107. This structural arrangement is closely linked to the movement of the filter holder 110. The downward movement of the filter holder 110 drives the rotation of the lead screw b213 and the drive shaft 511, which in turn rotates the positioning platform 111 through the chain 513 and gear transmission. This linkage mechanism ensures that when the filter holder 110 moves to a predetermined position, the positioning platform 111 automatically adjusts the docking angle of the sample tube 113 based on the position of the filter holder 110, allowing for timely preparation for the next sample separation process. The incomplete gear arrangement, coupled with gear d512 and gear c510, ensures that during the downward movement of the filter holder 110, the positioning platform 111 can rotate by a predetermined angle, thereby properly docking the next sample tube 113 into the sample separation channel 107. The unique structural design of the incomplete gears allows gears d512 and c510 to automatically disengage after the filter holder 110 completes its downward movement and the next filter screen section is fully docked with the filter port 109, preventing excessive rotation and preventing the positioning platform 111 from continuing to rotate. The key to this design lies in precise motion control, ensuring that the rotation of the positioning platform 111 occurs only at specific stages within the filter holder 110, thus avoiding positioning errors or unnecessary operations caused by excessive rotation. The disengagement mechanism of gear d512 and gear c510 can effectively prevent excessive rotation, maintain the stability and reliability of the system, and ensure that after the filter screen is docked with the filter port 109, the sample tube 113 can smoothly distribute liquid.

[0079] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A water quality detection device for environmental protection, comprising a sample separation tank (100), wherein a plurality of partitions (101) are provided in the sample separation tank (100), characterized in that: The partition (101) separates the sample separation tank (100) into a diversion chamber (102), a sample separation chamber (103), a filter chamber (104) and an air inlet chamber (105); the diversion chamber (102) is connected to a liquid discharge pipe (106), and the sample separation chamber (103) is connected to a sample separation channel (107); A filter tank (108) is provided on the sample separation tank (100), the filter tank (108) is detachably connected to the sample separation tank (100), a plurality of filter ports (109) are provided on the filter tank (108), a filter frame (110) is provided on the outer wall of the filter tank (108), and a plurality of filter screens with different apertures are provided on the filter frame (110), wherein the apertures of the plurality of filter screens gradually decrease from bottom to top; A positioning platform (111) is provided on the outer wall of the sample separation tank (100), wherein a plurality of positioning openings (112) are provided on the positioning platform (111), and sample separation test tubes (113) are provided in the positioning openings (112), wherein one of the sample separation test tubes (113) corresponds to the sample separation channel (107); A filter component is provided between the sample separation tank (100) and the filter tank (108), and is used to generate positive pressure on the gas transported to the filter chamber (104) to force the liquid to enter the filter tank (108) through the filter port (109); a conveying component provided between the filter tank (108) and the filter cavity (104), used for forming a negative pressure in the filter tank (108) to convey the liquid into the diversion cavity (102); A positioning component provided on the positioning platform (111) is used to position the sample separation test tube (113) in the positioning port (112) when the filter tank (108) is buckled onto the sample separation tank (100); The filter component includes a push plate (200) arranged in the air inlet cavity (105), the push plate (200) is slidably connected to the air inlet cavity (105), the inner wall of the air inlet cavity (105) is provided with a plurality of air inlets a (201) connected to the outside, the height of the air inlet a (201) is higher than the push plate (200), the bottom of the filter cavity (104) is provided with an air inlet b (202) connected to the air inlet cavity (105), a piston (203) is slidably connected in the air inlet b (202), and a spring a (204) is connected between the piston (203) and the air inlet b (202).

2. A water quality detection device for environmental protection according to claim 1, characterized in that: The filter component further includes a motor (205) connected to the air inlet chamber (105), a screw a (206) is provided on the rotating shaft of the motor (205), the screw a (206) is a reciprocating screw, and the push plate (200) is threadedly connected to the screw a (206).

3. The water quality detection device for environmental protection according to claim 1, characterized in that: The filter component can move the filter frame (110) downward by a preset distance each time a preset amount of gas is delivered, so that a filter screen with another aperture corresponds to the filter port (109); The filter component further comprises a connecting shaft (207) rotatably connected to the bottom of the filter chamber (104), the connecting shaft (207) passes through the filter chamber (104) and the push plate (200) and extends to the bottom of the push plate (200), a guide tube (208) is connected to the connecting shaft (207), a guide groove (209) is provided on the outer wall of the guide tube (208), the bottom of the push plate (200) is connected to a guide rod (210) slidably connected to the guide groove (209), and a gear a (211) is provided on the top of the connecting shaft (207). ), a ratchet mechanism (212) is provided between the gear a (211) and the connecting shaft (207), a screw b (213) is rotatably connected in the filter chamber (104), the screw b (213) is a reciprocating screw, a gear b (214) meshing with the gear a (211) is connected to the screw b (213), a push rod (215) is threadedly connected to the screw b (213), one end of the push rod (215) is a magnet (216), which is magnetically attracted to the filter frame (110), and the gear a (211) is an incomplete gear.

4. A water quality detection device for environmental protection according to claim 2, characterized in that: The conveying component comprises an extraction chamber (300) opened in the filter tank (108), the outer wall of the extraction chamber (300) is provided with a plurality of diversion ports (301) connected to the diversion chamber (102), a volute (302) is provided in the extraction chamber (300), the bottom of the volute (302) is connected to an extraction pipe (303) extending to one side of the filter port (109), and an impeller (304) is provided in the volute (302).

5. A water quality detection device for environmental protection according to claim 4, characterized in that: The conveying component is capable of extracting liquid from the filter tank (108) into the diversion chamber (102) when the filtering component is working; The conveying component also includes a driving shaft (305) connected to the impeller (304), the bottom of the driving shaft (305) extends to the bottom of the filter tank (108) and is connected to a connecting piece a (306), the top of the screw a (206) extends into the filter chamber (104) and is connected to a connecting piece b (307), the portion of the screw a (206) extending into the filter chamber (104) is a portion without threads, the top of the connecting piece b (307) is connected to a spring telescopic rod (308), the bottom of the connecting piece a (306) is provided with a limiting slide groove (309), and one end of the spring telescopic rod (308) extends into the limiting slide groove (309).

6. The water quality detection device for environmental protection according to claim 3, characterized in that: Whenever the filter support (110) moves downward by a preset distance a, the liquid can enter the sample separation chamber (103) and be transported to the sample separation channel (107); The bottom of the diversion chamber (102) is provided with a plurality of liquid inlets (400) communicating with the sample dividing chamber (103); a push ring (401) is slidably connected in the sample dividing chamber (103); a connecting rod a (402) is connected to the top of the push ring (401); a connecting rod b (403) is slidably connected in the connecting rod a (402); a baffle (404) for closing the liquid inlet (400) is connected to the top of the connecting rod b (403); a baffle (405) located at the bottom of the baffle (404) is connected to the inner wall of the sample dividing chamber (103); the baffle (405) is connected to the inner wall of the sample dividing chamber (103); There is a spacing between the baffles (404), and wedge-shaped openings (406) are respectively opened on both sides of the interior of the connecting rod a (402). A wedge-shaped strip (407) adapted to the wedge-shaped opening (406) is slidably connected to the connecting rod b (403), and a spring b (408) is connected between the wedge strip (407) and the connecting rod b (403). The bottom of the push ring (401) is connected to a connecting frame (409), and the top of the screw b (213) extends into the sample separation chamber (103) and is connected to a screw c (410), and the screw c (410) is a reciprocating screw.

7. The water quality detection device for environmental protection according to claim 1, characterized in that: The positioning component comprises a connection port (500) provided on the positioning platform (111), the connection port (500) being in communication with the positioning port (112), a positioning block (501) being slidably connected in the connection port (500), a connecting plate (502) being slidably connected in the connection port (500), a top contact strip (503) being connected to the top of the connecting plate (502), and being located on one side of the positioning block (501), and a contact strip (503) being provided between the positioning block (501) and the connection port (500), and the connecting plate (502). 02) and the connecting port (500), a spring c (504) is provided between the connecting plate (502) and the connecting port (500), a connecting rod a (505) is connected to one side of the connecting plate (502), a connecting rod b (506) is slidably connected to the sample separation tank (100), a spring d (507) is connected between the connecting rod b (506) and the sample separation tank (100), a pressure ring (508) is connected to the top of the connecting rod a (505), and a ball (509) in contact with the pressure ring (508) is connected to the bottom of the connecting rod b (506).

8. The water quality detection device for environmental protection according to claim 1, characterized in that: A connecting ring (114) is connected to the top cover of the filter tank (108), and the connecting ring (114) is threadedly connected to the sample separation tank (100).

9. The water quality detection device for environmental protection according to claim 3, characterized in that: Whenever the filter holder (110) moves downward by a preset distance b, the positioning platform (111) can rotate by a preset angle so that another sample separation test tube (113) corresponds to the sample separation channel (107), and the preset distance b is shorter than the preset distance a; The bottom of the positioning platform (111) is connected to a gear c (510), the sample separation tank (100) is rotatably connected to a transmission shaft (511), one end of the lead screw b (213) extends to the bottom of the push plate (200), and a chain (513) is connected between the lead screw b and the transmission shaft (511), and the transmission shaft (511) is connected to a gear d (512) adapted to the gear c (510), and the gear d (512) is an incomplete gear.

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