A wastewater sampling device for wastewater detection with stratified sampling

Abstract

The invention discloses a wastewater sampling device for wastewater detection with stratified sampling, comprising a sampling mechanism, wherein the sampling mechanism comprises a sampling seat, a sampling shell arranged on the sampling seat, a piston rod penetrating the sampling seat and the sampling shell, a plurality of piston bodies movably arranged in the sampling shell along a height direction, and a plurality of sampling units rotatably arranged in the sampling shell along a height direction; the piston body is connected with the piston rod, a plurality of sampling units correspond to a plurality of piston bodies one by one, the sampling unit is located below the corresponding piston body, a sampling cavity is formed between the sampling unit and the corresponding piston body and the sampling shell, and a storage cavity is formed between the sampling unit and the corresponding piston body; the sampling shell is respectively provided with sampling ports at positions corresponding to each sampling unit; thereby, during sampling, wastewater of different depths can be sampled simultaneously, and stratified sampling is realized at the same time, and the sampling operation is simple.

Description

Technical Field

[0001] The invention relates to the technical field of sampling, in particular to a wastewater sampling device for wastewater detection with stratified sampling. Background Art

[0002] Wastewater sampling is an important part of water quality testing in environmental protection testing, especially the polluted wastewater generated during the factory production process needs to be sampled for chemical testing and analysis.

[0003] Most of the existing wastewater sampling devices adopt a single sampling method, with a simple structure and a single function, and cannot sample in layers at the same time, resulting in cumbersome operation steps and increased workload. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a wastewater sampling device for wastewater detection with stratified sampling, so that when sampling, wastewater at different depths can be sampled simultaneously, realizing simultaneous stratified sampling and simplifying the sampling operation.

[0005] To achieve the above object, the specific scheme of the present invention is as follows:

[0006] A wastewater sampling device for wastewater detection with stratified sampling, comprising a sampling mechanism, the sampling mechanism comprising a sampling seat, a sampling shell arranged on the sampling seat, a piston rod passing through the sampling seat and the sampling shell, a plurality of piston bodies movably arranged in the sampling shell in a height direction, and a plurality of sampling units rotatably arranged in the sampling shell in a height direction;

[0007] The piston body is connected to the piston rod, and multiple sampling units correspond to the multiple piston bodies one by one. The sampling units are located below the corresponding piston bodies. A sampling cavity is formed between the sampling units, the corresponding piston bodies and the sampling shell. A storage cavity is formed between the sampling units and the corresponding piston bodies. The sampling shell is provided with sampling ports corresponding to the positions of each sampling unit.

[0008] The present invention is further configured such that a plurality of sampling ports arranged at intervals are circumferentially arranged at positions of the sampling shell corresponding to each sampling unit, the sampling unit comprises a sampling disc body, a plurality of liquid inlet one-way valves distributed along the circumferential direction are arranged at positions of the sampling disc body corresponding to the sampling ports, a sampling tube body is convexly provided at the middle of the sampling disc body, a piston body is movably sleeved on the outer wall of the sampling tube body, a sampling cavity is enclosed between the sampling disc body, the sampling shell, the sampling tube body and the piston body, a storage cavity is enclosed between the sampling tube body and the piston body, and a plurality of liquid discharge one-way valves distributed along the circumferential direction are arranged on the tube wall of the sampling tube body.

[0009] The present invention is further configured such that a driving arm extends from the bottom of the piston body, a driving pin is elastically and floatingly connected to the driving arm, a driving groove is provided on the outer wall of the sampling tube body, and the driving groove includes a first spiral groove and a vertical groove connected end to end; when the driving pin cooperates with the first spiral groove, the piston body drives the sampling disc body to rotate; when the driving pin cooperates with the vertical groove, the sampling disc body remains stationary.

[0010] The present invention is further configured such that the piston body is slidably connected in the sampling shell, a receiving cavity is recessed inwardly at the bottom of the piston body, a sealing end cover is rotatably provided in the receiving cavity, the sealing end cover is fixedly sleeved on the outer wall of the piston rod, a first tension spring is connected between the sealing end cover and the inner top wall of the receiving cavity, the sampling tube body is movably inserted into the receiving cavity, and the receiving cavity, the sealing end cover and the sampling tube body enclose to form a storage cavity.

[0011] The present invention is further configured such that the piston body is profile-matched with the inner wall of the sampling housing.

[0012] The present invention is further configured such that a plurality of sampling storage tubes corresponding to the sampling units are passed through the sampling shell; one end of the sampling storage tube is connected to the corresponding storage cavity, and the other end passes downward through the sampling seat; a sealing film is provided at the other end of the sampling storage tube.

[0013] The present invention is further configured such that a rotating cover is rotatably arranged at the center of the bottom of the sampling seat, and each sampling storage tube passes through the rotating cover and is fixedly connected to the rotating cover.

[0014] The present invention is further configured that the wastewater sampling device for wastewater detection also includes a sample placement mechanism; the sample placement mechanism includes a sample placement table, a driving disk rotatably arranged on the sample placement table, and a driving structure arranged in the sample placement table for causing the driving disk to rotate unidirectionally; a plurality of telescopic slide rails are evenly distributed on the bottom of the driving disk;

[0015] A sample laying channel is provided in the sample laying table corresponding to each sampling unit. One end of the sample laying channel passes through the sample laying table upward and is provided with a pin. The other end of the sample laying channel extends to the top of the driving disk. The other end of the sample laying channel is provided with a first magnetic valve. The sample laying table is provided with a feed chute for placing the sampling box. A second magnetic valve having the same magnetic property as the first magnetic valve is provided on the top of the sampling box.

[0016] The top of the piston rod passes through the sampling seat upwards, a first spring is arranged between the top of the piston rod and the sampling seat, the bottom of the first spring is fixed to the sampling seat, and the top of the first spring is movably abutted against the top of the piston rod; a push rod is fixed inside the piston rod.

[0017] The present invention is further configured such that a plurality of blocking bosses are evenly distributed on the bottom of the driving disk, a receiving groove is formed between adjacent blocking bosses, and a telescopic slide rail is arranged in the receiving groove; a driving track is arranged under the driving disk corresponding to each telescopic slide rail on the sample placing table; the plurality of driving tracks are arranged concentrically, and the width gradually increases from the inside to the outside, and the depth gradually decreases from the inside to the outside;

[0018] The driving track includes an arc segment and a radial segment connected end to end; the radial segments of each driving track are collinear; a bayonet is provided at the movable end of each telescopic slide rail, the bayonet is movably embedded in the corresponding driving track, and the diameter of the bayonet is adapted to the width of the corresponding driving track; the radial segment corresponds to the position of the feed chute.

[0019] The present invention is further configured as follows: a driving structure includes a push shaft lifted and lowered on the sample setting table, a second tension spring connected between the top of the push shaft and the sample setting table, a switching pin movably arranged on the side wall of the push shaft and a friction block embedded in the push shaft, a driving disk top is convexly provided with a concentrically arranged outer ring platform and an inner ring platform, the inner wall of the outer ring platform is provided with a plurality of second spiral grooves spiraling downward at equal intervals along the circumferential direction, the outer wall of the inner ring platform is provided with a plurality of third spiral grooves spiraling upward at equal intervals along the circumferential direction, the second spiral grooves and the third spiral grooves are staggered, the top of one of the second spiral grooves is provided with an inlet, the top of the third spiral groove corresponding to the second spiral groove with the inlet is provided with an outlet, the bottom end of the second spiral groove is provided with a first wedge platform, and the top end of the third spiral groove is provided with a second wedge platform; the friction block is in friction contact with the switching pin.

[0020] The beneficial effects of the present invention are as follows: by setting the height of each sampling chamber to gradually increase from bottom to top, wastewater at different depths can be sampled simultaneously during sampling, achieving simultaneous stratified sampling, and the sampling operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0023] Figure 3 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0024] Figure 4 yes Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0025] Figure 5 is a stereogram of the sampling mechanism of the present invention;

[0026] Figure 6 It is a three-dimensional diagram of a partial structure of the sampling mechanism of the present invention;

[0027] Figure 7 It is a cross-sectional schematic diagram of a partial structure of the sampling mechanism of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of three sampling units of the present invention;

[0029] Fig. 9It is a schematic diagram of the structure of the sampling disc body of the present invention;

[0030] Fig.10 is a cross-sectional schematic diagram of a piston body of the present invention;

[0031] Fig.11 It is a structural schematic diagram of the lofting mechanism of the present invention;

[0032] Fig.12 It is a cross-sectional schematic diagram of the lofting mechanism of the present invention;

[0033] Fig.13 It is a structural schematic diagram of the sample placing platform of the present invention;

[0034] Fig.14 It is a schematic diagram of the structure of the cooperation between the driving disc and the telescopic slide rail of the present invention;

[0035] Fig.15 is a three-dimensional diagram of the drive disk of the present invention;

[0036] Fig.16 It is a schematic diagram of the structure of the drive disk of the present invention;

[0037] Fig.17 It is a cross-sectional schematic diagram of the cooperation between the push shaft, the switching pin and the friction block of the present invention;

[0038] Description of reference numerals: 11, sampling seat; 12, sampling housing; 121, sampling port; 13, piston rod; 131, push rod; 14, piston body; 141, sealing end cover; 142, first tension spring; 143, driving arm; 144, driving pin; 151, sampling disc body; 1511, sampling tube body; 1512, first spiral groove; 1513, vertical groove; 152, liquid inlet check valve; 153, liquid discharge check valve; 154, sampling storage tube; 155, sealing membrane; 16, sampling cavity; 17, storage cavity; 18, rotating cover; 19, first spring; 21, sample setting table; 211, sample setting channel; 21 2. ejector pin; 213. first magnetic valve; 214. feed chute; 2151. arc segment; 2152. radial segment; 22. drive disk; 221. blocking boss; 222. accommodating groove; 223. outer ring platform; 224. inner ring platform; 225. second spiral groove; 2251. inlet; 2252. first wedge platform; 226. third spiral groove; 2261. outlet; 2262. second wedge platform; 231. push shaft; 2311. slide; 232. second tension spring; 233. switching pin; 234. friction block; 24. telescopic slide rail; 241. latch; 25. sampling box; 251. second magnetic valve. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0040] like Figures 1 to 17 As shown, a wastewater sampling device for wastewater detection with stratified sampling described in this embodiment includes a sampling mechanism, which includes a sampling seat 11, a sampling shell 12 arranged on the sampling seat 11, a piston rod 13 passing through the sampling seat 11 and the sampling shell 12, a plurality of piston bodies 14 movably arranged in the sampling shell 12 along the height direction, and a plurality of sampling units rotatably arranged in the sampling shell 12 along the height direction;

[0041] The piston body 14 is connected to the piston rod 13, and the plurality of sampling units correspond to the plurality of piston bodies 14 one by one. The sampling unit is located below the corresponding piston body 14, and a sampling cavity 16 is formed between the sampling unit and the corresponding piston body 14 and the sampling housing 12, and a storage cavity 17 is formed between the sampling unit and the corresponding piston body 14; the sampling housing 12 is provided with a sampling port 121 at the position corresponding to each sampling unit. For example, as shown in FIG. Figures 6 to 8 As shown, in this embodiment, three piston bodies 14 and three sampling units are arranged along the height direction, and the piston rod 13 penetrates into the sampling housing 12 from top to bottom.

[0042] Specifically, when the wastewater sampling device for wastewater detection described in this embodiment is actually used, the sampling mechanism is placed in the wastewater to be sampled, and then the piston rod 13 is pulled upward. The piston rod 13 drives each piston body 14 to move upward, so that the volume of each sampling cavity 16 increases and the pressure decreases, so that the wastewater to be sampled can enter the corresponding sampling cavity 16 through the corresponding sampling port 121 to obtain the sampled water body. After completion, the piston rod 13 is pressed downward, and each piston body 14 moves downward, so that the volume of each sampling cavity 16 decreases and the pressure increases. At this time, the sampled water body in the sampling cavity 16 enters the storage cavity 17 for storage. Since the height of each sampling cavity 16 gradually increases from bottom to top, when sampling, wastewater of different depths can be sampled at the same time, realizing simultaneous stratified sampling, and the sampling operation is simple.

[0043] like Figure 1 , Figure 2 and Figure 5As shown, a wastewater sampling device for wastewater detection with stratified sampling described in this embodiment, the sampling shell 12 is respectively provided with a plurality of sampling ports 121 arranged at intervals along the circumferential direction at the position corresponding to each sampling unit, the sampling unit includes a sampling disc body 151, and the sampling disc body 151 is provided with a plurality of liquid inlet check valves 152 distributed along the circumferential direction at the position corresponding to the sampling port 121, a sampling tube body 1511 is convexly provided in the middle of the sampling disc body 151, and the piston body 14 is movably sleeved on the outer wall of the sampling tube body 1511, and a sampling cavity 16 is enclosed between the sampling disc body 151, the sampling shell 12, the sampling tube body 1511 and the piston body 14, and a storage cavity 17 is enclosed between the sampling tube body 1511 and the piston body 14, and a plurality of liquid discharge check valves 153 distributed along the circumferential direction are provided on the tube wall of the sampling tube body 1511.

[0044] Specifically, when the piston body 14 moves upward, the volume of the sampling chamber 16 increases and the pressure decreases, the liquid inlet one-way valve 152 opens, and the liquid discharge one-way valve 153 closes, and the waste water to be sampled enters the sampling chamber 16 through the sampling port 121 and the liquid inlet one-way valve 152, and then the piston body 14 moves downward, the volume of the sampling chamber 16 decreases and the pressure increases, the liquid inlet one-way valve 152 is closed, and the liquid discharge one-way valve 153 opens at this time, and the sampled water in the sampling chamber 16 enters the storage chamber 17 through the liquid discharge one-way valve 153, thereby realizing the preservation of the sampled water.

[0045] like Fig. 9 and Fig.10 As shown, a wastewater sampling device for wastewater detection with stratified sampling described in this embodiment has a driving arm 143 extending from the bottom of the piston body 14, and a driving pin 144 is elastically and floatingly connected to the driving arm 143. A driving groove is provided on the outer wall of the sampling tube body 1511, and the driving groove includes a first spiral groove 1512 and a vertical groove 1513 connected end to end; when the driving pin 144 cooperates with the first spiral groove 1512, the piston body 14 drives the sampling disc body 151 to rotate; when the driving pin 144 cooperates with the vertical groove 1513, the sampling disc body 151 remains stationary.

[0046] Specifically, when the piston rod 13 is pulled upward, the piston rod 13 drives the piston body 14 to move upward, and the piston body 14 cooperates with the first spiral groove 1512 through the driving pin 144, so that the sampling disc body 151 rotates, so that the liquid inlet check valve 152 can always rotate continuously at different positions of the same depth during the suction process to sample, which is convenient for sampling in a larger range, thereby achieving uniformity of sampling, which is conducive to improving the comprehensiveness of wastewater detection, so that the detection result is more accurate;

[0047] When the piston rod 13 is pressed downward, the piston rod 13 drives the piston body 14 to move downward, and the driving pin 144 moves along the vertical slot 1513 . That is, when the piston body 14 moves downward, the piston body 14 will not drive the sampling disc body 151 to rotate.

[0048] like Figure 2 , Figure 3 and Figure 7 As shown, the present embodiment describes a wastewater sampling device for wastewater detection with stratified sampling, wherein the piston body 14 is slidably connected in the sampling shell body 12, and an accommodating cavity is recessed inwardly at the bottom of the piston body 14, in which a sealing end cover 141 is rotatably installed, and the sealing end cover 141 is fixedly sleeved on the outer wall of the piston rod 13, and a first tension spring 142 is connected between the sealing end cover 141 and the inner top wall of the accommodating cavity, and the sampling tube body 1511 is movably inserted into the accommodating cavity, and the accommodating cavity, the sealing end cover 141 and the sampling tube body 1511 enclose a storage cavity 17. In this embodiment, a sealing end cover 141 and a first tension spring 142 are provided, so that when the piston rod 13 moves upward, the piston rod 13 drives the piston body 14 to move upward synchronously through the sealing end cover 141 and the first tension spring 142, thereby realizing wastewater sampling; when the piston rod 13 moves downward, the piston rod 13 drives the piston body 14 to move downward synchronously through the sealing end cover 141 and the first tension spring 142 until the piston body 14 abuts against the sampling disc body 151, thereby realizing the transfer of the sampled water from the sampling chamber 16 to the storage chamber 17 for storage.

[0049] In the wastewater sampling device for wastewater detection with stratified sampling described in this embodiment, the piston body 14 is matched with the inner wall surface of the sampling housing 12. This arrangement is used to limit the rotational freedom of the piston body 14.

[0050] like Figure 8 As shown, in the wastewater sampling device for wastewater detection with stratified sampling described in this embodiment, a plurality of sampling storage tubes 154 corresponding to the sampling units are provided in the sampling housing 12; one end of the sampling storage tube 154 is connected to the corresponding storage cavity 17, and the other end downwardly passes through the sampling seat 11; a sealing film 155 is provided at the other end of the sampling storage tube 154. Specifically, the number of the sampling storage tubes 154 is three.

[0051] Specifically, the sampled water entering the storage chamber 17 flows into the sampling storage tube 154 accordingly, so that when detection is required, the sampled water is guided out of the storage chamber 17 through the sampling storage tube 154 .

[0052] like Figure 2 , Figure 4 and Figure 5 As shown, in the wastewater sampling device for wastewater detection with stratified sampling described in this embodiment, a rotating cover 18 is rotatably provided at the center of the bottom of the sampling seat 11, and each sampling storage tube 154 passes through the rotating cover 18 and is fixedly connected to the rotating cover 18. In this embodiment, the rotating cover 18 is used so that each sampling storage tube 154 is more stable when rotating with the sampling disc body 151.

[0053] like Figure 1 , Figure 2 , Figures 11 to 17 As shown, a wastewater sampling device for wastewater detection with stratified sampling described in this embodiment, the wastewater sampling device for wastewater detection also includes a lofting mechanism; the lofting mechanism includes a lofting table 21, a driving disk 22 rotatably arranged on the lofting table 21, and a driving structure arranged in the lofting table 21 for making the driving disk 22 rotate unidirectionally; a plurality of telescopic slide rails 24 are evenly distributed at the bottom of the driving disk 22; a lofting channel 211 is respectively provided in the lofting table 21 corresponding to each sampling unit, one end of the lofting channel 211 penetrates the lofting table 21 upward and is provided with a ejector pin 212, the other end of the lofting channel 211 extends to the top of the driving disk 22, and the other end of the lofting channel 211 is provided with a first magnetic valve 213; the lofting table 21 is provided with a feeding chute 214 for placing a sampling box 25; a second magnetic valve 251 having the same magnetic properties as the first magnetic valve 213 is provided on the top of the sampling box 25;

[0054] The top of the piston rod 13 passes through the sampling seat 11 upwards, a first spring 19 is arranged between the top of the piston rod 13 and the sampling seat 11, the bottom of the first spring 19 is fixed to the sampling seat 11, and the top of the first spring 19 is movably in contact with the top of the piston rod 13; a push rod 131 is fixed inside the piston rod 13. Correspondingly, there are three sample channels 211, three telescopic rails 24, three driving rails, and three first magnetic valves 213 are located in the same radial direction.

[0055] like Figure 2 As shown, when the first spring 19 is in a natural state, the push rod 131 passes through the rotating cover 18 downward and then extends out of the sampling seat 11.

[0056] Specifically, after the sampling is completed, the sampled water body needs to be laid out, and the sampling seat 11 is placed on the laying out table 21, so that each sampling storage tube 154 is inserted into the laying out channel 211 one by one, and the push rod 131 is abutted against the driving structure. At this time, the push pin 212 pierces the sealing film 155 on the sampling storage tube 154, so that the sampled water in the sampling storage tube 154 enters the laying out channel 211, and the sampling box 25 is placed in the feeding chute 214 at the same time; the piston rod 13 is pressed down again, the first spring 19 is compressed, and the push rod 131 causes the driving structure to drive the driving disk 22 to rotate unidirectionally, so that one of the telescopic slide rails 24 corresponds to the position of the feeding chute 214, and then the sampling box 25 on the feeding chute 214 is pushed into the telescopic slide rail 24, and then the piston rod 13 is released, and the piston rod 13 is reset under the elastic force of the first spring 19, and the driving structure drives the driving disk 22 to continue to rotate unidirectionally;

[0057] Then, the piston rod 13 is pressed again, so that the driving structure drives the driving disk 22 to continue to rotate unidirectionally, so that the telescopic slide rail 24 loaded with the sampling box 25 rotates until the sampling box 25 is located directly below the corresponding sampling channel 211. At this time, under the action of the magnetic force between the second magnetic valve 251 and the first magnetic valve 213, the first magnetic valve 213 opens the corresponding sampling channel 211, and the second magnetic valve 251 opens the sampling box 25. At this time, the sampled water in the corresponding sampling channel 211 enters the sampling box 25, thereby realizing the sampling of the sampled water. At the same time, the driving disk 22 drives the next telescopic slide rail 24 to rotate to the position corresponding to the feed chute 214, and the next sampling box 25 on the feed chute 214 enters the corresponding telescopic slide rail 24. The piston rod 13 is pressed cyclically in this way until the sampled water in all storage chambers 17 are respectively stored in the sampling boxes 25, thereby completing the sampling of the sampled water in all sampling units.

[0058] like Figures 14 to 16 As shown, a wastewater sampling device for wastewater detection with stratified sampling described in this embodiment has a plurality of blocking bosses 221 evenly distributed on the bottom of the driving disk 22, and a receiving groove 222 is formed between adjacent blocking bosses 221, and a telescopic slide 24 is arranged in the receiving groove 222; the sample placing table 21 is provided with a driving track corresponding to each telescopic slide 24 below the driving disk 22; the plurality of driving tracks are concentrically arranged, and the width gradually increases from the inside to the outside, and the depth gradually decreases from the inside to the outside; the driving track includes an arc segment 2151 and a radial segment 2152 connected end to end, specifically, the number of the radial segments 2152 is two, the inner ends of the two radial segments 2152 are connected at the center of the circle, and the two The other end of the radial section 2152 is respectively connected to the two ends of the arc section 2151; the radial sections 2152 of each driving rail are collinear, that is, the radial sections 2152 of each driving rail are arranged sequentially in the depth direction; the movable end of each telescopic slide rail 24 is provided with a bayonet 241, and the bayonet 241 is movably embedded in the corresponding driving rail, and the diameter of the bayonet 241 is adapted to the width of the corresponding driving rail. In this way, when each bayonet 241 enters the radial section 2152, it can cooperate with the corresponding radial section 2152 without entering the radial section 2152 of other driving rails; the radial section 2152 corresponds to the position of the feed chute 214. Correspondingly, the number of blocking bosses 221 is three, the number of accommodating grooves 222 is three, and the three first magnetic valves 213 correspond one by one to the circular arc segments 2151 of the three driving tracks, that is, when the pin 24 on the telescopic slide rail 24 moves along the corresponding circular arc segment 2151 track, the telescopic slide rail 24 can drive the sampling box 25 to move so that the second magnetic valve 251 on the sampling box 25 is located directly below the corresponding first magnetic valve 213, so that the first magnetic valve 213 opens the corresponding sampling channel 211, and the second magnetic valve 251 opens the sampling box 25.

[0059] Initially, the blocking boss 221 of the drive disk 22 corresponds to the position of the feed chute 214, blocking the sampling box 25 on the feed chute 214 from entering. As the piston rod 13 is pressed, the piston rod 13 drives the push rod 131 to press down the drive structure, so that the drive structure drives the drive disk 22 to rotate sixty degrees in one direction, so that during the rotation of one of the telescopic slide rails 24, the latch 241 on the telescopic slide rail 24 moves along the radial section 2152 until the latch 241 moves to the center of the drive rail. At this time, the telescopic slide rail 24 corresponds to the position of the feed chute 214, and the sample box 25 on the feed chute 214 enters. The sampling box 25 on the material chute 214 is pushed onto the telescopic slide rail 24, and then the piston rod 13 is released, and the piston rod 13 drives the push rod 131 to release the squeeze on the driving structure, and the driving structure causes the driving disk 22 to continue to rotate 60 degrees in one direction. At this time, the next blocking boss 221 corresponds to the position of the feed chute 214, and the telescopic slide rail 24 carrying the sampling box 25 drives the sampling box 25 to rotate, and the latch 241 of the telescopic slide rail 24 moves from the center position along another radial segment 2152 until it moves to the intersection of another radial segment 2152 and the corresponding arc segment 2151;

[0060] As the piston rod 13 is pressed again, the piston rod 13 drives the push rod 131 to press down the driving structure, so that the driving structure drives the driving disk 22 to rotate sixty degrees in one direction, so that the telescopic slide 24 carrying the sampling box 25 rotates until the sampling box 25 rotates to be directly below the corresponding sampling channel 211, and the corresponding first magnetic valve 213 and second magnetic valve 251 generate magnetic force, so that the sampled water in the storage chamber 17 enters the sampling box 25 through the sampling storage tube 154 and the sampling channel 211, thereby realizing the sampling of the sampled water. At the same time, the driving disk 22 drives the next telescopic slide 24 to move to the position corresponding to the next telescopic slide 24 and the feeding chute 214, and the next sampling box 25 on the feeding chute 214 is pushed onto the next telescopic slide 24. The piston rod 13 is pressed back and forth in this way to complete the sampling of the sampled water in each storage chamber 17.

[0061] like Figure 2 , Figure 4 , Figures 12 to 17As shown, a wastewater sampling device for wastewater detection with stratified sampling described in this embodiment, the driving structure includes a push shaft 231 lifted and lowered on the sample setting table 21, a second tension spring 232 connected between the top of the push shaft 231 and the sample setting table 21, a switching pin 233 movably penetrated through the side wall of the push shaft 231 and a friction block 234 embedded in the push shaft 231, the top of the driving disk 22 is convexly provided with a concentrically arranged outer ring platform 223 and an inner ring platform 224, the inner wall of the outer ring platform 223 is provided with a plurality of second spiral grooves 225 spiraling downward at equal intervals along the circumferential direction, and the inner ring platform The outer wall of 224 is provided with a plurality of third spiral grooves 226 spiraling upward at equal intervals along the circumferential direction, and the second spiral grooves 225 and the third spiral grooves 226 are alternately distributed, wherein an inlet 2251 is provided at the top end of one of the second spiral grooves 225, and an outlet 2261 is provided at the top end of the third spiral groove 226 corresponding to the second spiral groove 225 having the inlet 2251, a first wedge-shaped platform 2252 is provided at the bottom end of the second spiral groove 225, and a second wedge-shaped platform 2262 is provided at the top end of the third spiral groove 226; the friction block 234 is in friction contact with the switching pin 233.

[0062] The push pin 233 moves along the track of the third spiral groove 226. At this time, under the cooperation of the switching pin 233 and the third spiral groove 226, the push shaft 231 continues to drive the driving disk 22 to rotate unidirectionally. The first spring 2262 pushes the switch pin 233 to move out of the second spiral groove 225 through the inlet 2251 until the push pin 233 is pushed out of the second spiral groove 225 through the inlet 2251 until the push pin 233 is pushed back into the second spiral groove 225 through the inlet 2251 until the push pin 231 is reset.

[0063] like Fig.12 and Fig.17 As shown, in the wastewater sampling device for wastewater detection with stratified sampling described in this embodiment, a slide 2311 is convexly provided on the outer wall of the push shaft 231, and a limiting groove is provided on the inner wall of the sample placement table 21. The slide 2311 is slidably set in the limiting groove, so that the rotational freedom of the push shaft 231 is limited by the cooperation of the slide 2311 and the limiting groove, and at the same time, a guide is provided for the push shaft 231, so that the push shaft 231 moves more stably under the extrusion of the push rod 131.

[0064] The wastewater sampling device for wastewater detection with stratified sampling described in this embodiment has a profile groove on the top of the push shaft 231. When the sampling mechanism is placed on the sample placement table 21, the bottom end of the push rod 131 is movably inserted into the profile groove so that the push rod 131 can reliably push the push shaft 231 to move downward.

[0065] The above is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. A wastewater sampling device for wastewater detection with stratified sampling, characterized in that: The sampling mechanism comprises a sampling seat, a sampling shell arranged on the sampling seat, a piston rod passing through the sampling seat and the sampling shell, a plurality of piston bodies arranged in the sampling shell in a movable manner along the height direction, and a plurality of sampling units arranged in the sampling shell in a rotatable manner along the height direction; The piston body is connected to the piston rod, and the plurality of sampling units correspond to the plurality of piston bodies one by one. The sampling unit is located below the corresponding piston body, a sampling cavity is formed between the sampling unit, the corresponding piston body and the sampling housing, and a storage cavity is formed between the sampling unit and the corresponding piston body; the sampling housing is provided with sampling ports at positions corresponding to each sampling unit; The wastewater sampling device for wastewater detection also includes a sample placement mechanism; the sample placement mechanism includes a sample placement table, a driving disk rotatably arranged on the sample placement table, and a driving structure arranged in the sample placement table for making the driving disk rotate in one direction; a plurality of telescopic slide rails are evenly distributed on the bottom of the driving disk; A sample laying channel is provided in the sample laying table corresponding to each sampling unit. One end of the sample laying channel passes through the sample laying table upward and is provided with a pin. The other end of the sample laying channel extends to the top of the driving disk. The other end of the sample laying channel is provided with a first magnetic valve. The sample laying table is provided with a feed chute for placing the sampling box. A second magnetic valve having the same magnetic property as the first magnetic valve is provided on the top of the sampling box. The top end of the piston rod passes through the sampling seat upwards, a first spring is arranged between the top end of the piston rod and the sampling seat, the bottom end of the first spring is fixed to the sampling seat, and the top end of the first spring is movably abutted against the top end of the piston rod; a push rod is fixed inside the piston rod; A plurality of blocking bosses are evenly distributed at the bottom of the driving disk, and a receiving groove is formed between adjacent blocking bosses, and the telescopic slide rail is arranged in the receiving groove; the lofting table is provided with a driving track corresponding to each telescopic slide rail under the driving disk; the plurality of driving tracks are concentrically arranged, and the width gradually increases from the inside to the outside, and the depth gradually decreases from the inside to the outside; The driving track includes an arc segment and a radial segment connected end to end; the radial segments of each driving track are collinear; a bayonet is provided at the movable end of each telescopic slide rail, the bayonet is movably embedded in the corresponding driving track, and the diameter of the bayonet is adapted to the width of the corresponding driving track; the radial segment corresponds to the position of the feed chute; The driving structure includes a push shaft lifted and lowered on the sample setting table, a second tension spring connected between the top of the push shaft and the sample setting table, a switching pin movably penetrated through the side wall of the push shaft and a friction block embedded in the push shaft, a concentrically arranged outer ring platform and an inner ring platform are convexly provided on the top of the driving disk, a plurality of second spiral grooves spiraling downward are provided on the inner wall of the outer ring platform at equal intervals along the circumferential direction, a plurality of third spiral grooves spiraling upward are provided on the outer wall of the inner ring platform at equal intervals along the circumferential direction, the second spiral grooves and the third spiral grooves are staggered, a top end of one of the second spiral grooves is provided with an inlet, a top end of the third spiral groove corresponding to the second spiral groove with an inlet is provided with an outlet, a first wedge-shaped platform is provided at the bottom end of the second spiral groove, and a second wedge-shaped platform is provided at the top end of the third spiral groove; the friction block is in friction contact with the switching pin.

2. A wastewater sampling device for wastewater detection with stratified sampling according to claim 1, characterized in that: The sampling shell is provided with a plurality of sampling ports spaced apart along the circumferential direction at positions corresponding to each sampling unit. The sampling unit comprises a sampling disc body. The sampling disc body is provided with a plurality of liquid inlet one-way valves distributed along the circumferential direction at positions corresponding to the sampling ports. A sampling tube body is convexly provided at the middle of the sampling disc body. The piston body is movably sleeved on the outer wall of the sampling tube body. A sampling cavity is enclosed between the sampling disc body, the sampling shell, the sampling tube body and the piston body. A storage cavity is enclosed between the sampling tube body and the piston body. The tube wall of the sampling tube body is provided with a plurality of liquid discharge one-way valves distributed along the circumferential direction.

3. A wastewater sampling device for wastewater detection with stratified sampling according to claim 2, characterized in that: A driving arm extends from the bottom of the piston body, and a driving pin is elastically and floatingly connected to the driving arm. A driving groove is provided on the outer wall of the sampling tube body, and the driving groove includes a first spiral groove and a vertical groove connected end to end; when the driving pin cooperates with the first spiral groove, the piston body drives the sampling disc body to rotate; when the driving pin cooperates with the vertical groove, the sampling disc body remains stationary.

4. A wastewater sampling device for wastewater detection with stratified sampling according to claim 2, characterized in that: The piston body is slidably connected in the sampling shell body, and an accommodating cavity is recessed inwardly at the bottom of the piston body. A sealing end cover is rotatably provided in the accommodating cavity. The sealing end cover is fixedly sleeved on the outer wall of the piston rod, and a first tension spring is connected between the sealing end cover and the inner top wall of the accommodating cavity. The sampling tube body is movably inserted into the accommodating cavity, and the accommodating cavity, the sealing end cover and the sampling tube body enclose to form a storage cavity.

5. A wastewater sampling device for wastewater detection with stratified sampling according to claim 4, characterized in that: The piston body is matched with the inner wall of the sampling shell.

6. The wastewater sampling device for wastewater detection with stratified sampling according to claim 2, characterized in that: A plurality of sampling storage tubes corresponding to the sampling units are arranged in the sampling shell; one end of the sampling storage tube is connected with the corresponding storage cavity, and the other end passes downward through the sampling seat; a sealing film is arranged at the other end of the sampling storage tube.

7. A wastewater sampling device for wastewater detection with stratified sampling according to claim 6, characterized in that: A rotating cover is rotatably arranged at the center of the bottom of the sampling seat, and each sampling storage tube passes through the rotating cover and is fixedly connected to the rotating cover.

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