A sewage sampling device with a fixed-point sampling function

Abstract

The invention discloses a sewage sampling device with a fixed-point collection function, the sewage sampling device comprises a base frame, a lifting mechanism, a first motor, a coupling, a telescopic mechanism, a direction-changing wheel frame, a winch and a sampling mechanism, the lifting mechanism, the first motor, the telescopic mechanism and the winch are all fixedly connected to the base frame, the coupling is transmission-connected to the output end of the first motor and the telescopic mechanism, the direction-changing wheel frame is fixedly connected to the telescopic mechanism, the sampling mechanism is fixedly connected to the winch, and the sampling mechanism is slidingly connected to the direction-changing wheel frame; the invention relates to the technical field of sewage sampling equipment, the invention can sample sewage in the middle part of a river channel at the riverside, reducing the risk of a sampling person falling into water by slipping, the invention can dive to different water depths in a directional manner, complete stratified sampling and preservation of sewage in different water layers, and improve the accuracy of sampled specimens.

Description

Technical Field

[0001] The invention relates to the technical field of sewage sampling equipment, in particular to a sewage sampling device with a fixed-point collection function. Background Art

[0002] Sewage pollution in rivers is a serious environmental problem that directly threatens the health of aquatic ecosystems and the sustainable development of human society. As industrial wastewater, domestic sewage, fertilizers, pesticides and other agricultural wastewater are directly discharged into rivers, toxic and harmful substances will destroy the living environment of aquatic organisms. In severe cases, it will lead to the death of aquatic organisms, affect the balance and stability of the aquatic ecosystem, and cause harm to human health.

[0003] Therefore, it is necessary to treat river sewage. Before treating sewage, it is necessary to sample river sewage to determine the specific situation of river pollution and the specific composition of sewage, and formulate a treatment plan accordingly. In the existing river sewage sampling, most of the samples are taken at the middle point of the river by extending the rod. This sampling method does not take into account that the impurities in the sewage will be stratified in the river. The impurity composition between river water bodies in different stratifications will be different due to precipitation. If samples cannot be taken and compared for different water layers, there will be deviations in sewage sampling, which will affect the sewage treatment plan. Summary of the invention

[0004] The purpose of the present invention is to provide a sewage sampling device with a fixed-point collection function to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A sewage sampling device with a fixed-point collection function includes a base frame, a lifting mechanism, a first motor, a coupling, a telescopic mechanism, a changing wheel frame, a winch and a sampling mechanism. The lifting mechanism, the first motor, the telescopic mechanism and the winch are all fixedly connected to the base frame, the coupling is transmission-connected to the output end of the first motor and the telescopic mechanism, the changing wheel frame is fixedly connected to the telescopic mechanism, the sampling mechanism is fixedly connected to the winch, and the sampling mechanism is slidingly connected to the changing wheel frame.

[0006] This collection device is used for fixed-point sampling of river sewage. The device is placed beside the river, and the base frame is lifted by the lifting mechanism. The first motor outputs torque through the coupling, and the coupling transmits torque to the telescopic mechanism. The telescopic mechanism extends the reversing wheel frame to above the collection point in the river. The winch unwinds at the same time to lower the sampling mechanism. The sampling mechanism floats on the surface of the river. Through the rotation mode set by its internal motor, the sampling mechanism can dive to different water depths in a directed manner to complete the stratified sampling and preservation of sewage in different water layers. After the sampling mechanism completes the preservation, the winch reels in and lifts up the sampling mechanism for recovery.

[0007] Furthermore, the lifting mechanism includes a base, a slide rail, a slide rod, a side frame, a second motor, a first worm, and a torque transmission mechanism. The base is fixedly connected to the slide rail and the torque transmission mechanism. The slide rod is fixedly connected to the base frame and is slidably connected to the slide rail. The side frame is fixedly connected to the base and the second motor. The torque transmission mechanism is drivingly connected to the output end of the second motor and the first worm. The first worm is rotatably connected to the base frame.

[0008] The base is inserted into the ground for fixation. The second motor outputs torque to the torque transmission mechanism. The torque is transformed by the torque transmission mechanism to make the first worm rotate in a spiral manner. The upward spiral rotation of the first worm pushes the base frame, and the slide rod slides along the slide rail, thereby lifting the base frame by the first worm.

[0009] Furthermore, the torque transmission mechanism includes a grip frame, a rotating cylinder, and a toothed head rod. The grip frame is fixedly connected to the base. The toothed head rod is drivingly connected to the output end of the second motor. The grip frame is provided with a first through hole and a first inner ring groove. The first through hole is rotatably connected to the toothed head rod. The rotating cylinder is slidably connected to the first inner ring groove. The rotating cylinder is provided with an external tooth ring groove and a first internal thread. The external tooth ring groove meshes with the tooth surface of the toothed head rod. The first internal thread is threadedly connected to the first worm.

[0010] The second motor outputs torque to drive the toothed head rod to rotate in the first through hole. By the meshing of the tooth surface of the toothed head rod and the external tooth ring groove, the torque of the toothed head rod is transformed, causing the rotating cylinder to rotate in the first inner ring groove around the axis of the first worm. Through the threaded connection between the first internal thread provided on the rotating cylinder and the first worm, the rotation of the rotating cylinder is transformed into the upward spiral rotation of the first worm along its axis.

[0011] Furthermore, the telescoping mechanism includes a second worm, an outer cylinder, a first inner cylinder, a first sleeve, a second inner cylinder, a second sleeve, and a top cylinder. The outer cylinder is fixedly connected to the base frame. The outer cylinder is provided with a second through hole. The second worm is rotatably connected to the second through hole. The second worm is drivingly connected to a coupling. The first inner cylinder is provided with a second internal thread. The second internal thread is threadedly connected to the second worm. The first inner cylinder is slidably connected to the outer cylinder and the second inner cylinder. The first sleeve is slidably connected to the second worm. The first sleeve is provided with a first external thread. The second inner cylinder is provided with a third internal thread. The first external thread is threadedly connected to the third internal thread. The second sleeve is slidably connected to the first external thread. The second sleeve is provided with a second external thread. The top cylinder is provided with a fourth internal thread. The second external thread is threadedly connected to the fourth internal thread. The top cylinder is slidably connected to the second external thread. The top cylinder is fixedly connected to the direction-changing wheel frame.

[0012] The output torque of the first motor is transmitted to the second worm through a coupling. The second worm rotates within the second through-hole. Through the threaded connection between the second worm and the second internal thread, the first inner cylinder slides along the axis of the outer cylinder. The rotation of the second worm drives the rotation of the first sleeve through the convex block provided on the first sleeve. Through the threaded connection between the first external thread and the third internal thread, the second inner cylinder slides along the axis of the first inner cylinder. The first external thread drives the rotation of the second sleeve through the convex block provided on the second sleeve. Through the threaded connection between the second external thread and the fourth internal thread, the rotation of the second sleeve is converted into the sliding of the top cylinder along its axis, and the top cylinder pushes out the deflector bracket, causing it to extend to the center of the river channel.

[0013] Further, the sampling mechanism includes a steel cable, a diving mechanism, a third motor, a main cylinder shell, a liquid sampling mechanism, and a bottom basket. The steel cable is fixedly connected to both the winch and the diving mechanism, and is slidably connected to the deflector bracket. The diving mechanism is fixedly connected to the third motor. The output end of the third motor is fixedly connected to both the diving mechanism and the liquid sampling mechanism. The main cylinder shell is fixedly connected to the diving mechanism, the liquid sampling mechanism, and the bottom basket. The liquid sampling mechanism is slidably connected to the bottom basket.

[0014] The steel cable extends along the deflector bracket to the center of the river channel. By unwinding the steel cable through the winch, the bottom basket contacts the water surface of the river channel. The third motor outputs torque according to a preset value. When the third motor outputs a specified clockwise torque, the diving mechanism absorbs water to increase the weight of the sampling mechanism, expelling the pre-stored gas inside. The entire sampling mechanism begins to dive. When it reaches the specified depth, the third motor outputs a specified counterclockwise torque, and the liquid sampling mechanism samples the sewage at this depth layer and stores it in the bottom basket. This sampling mechanism can dive to different depth layers in multiple batches for sampling multiple times. After completing the multiple sampling operations, the winch winds up the steel cable to lift the sampling mechanism out of the water layer for recovery.

[0015] Further, the diving mechanism includes an outer ring, an inner ring cylinder, a one-way mechanism, a connecting rod, a one-way valve, and an air chamber. The outer ring is slidably connected to the main cylinder shell. The outer ring is provided with a convex post. The inner ring cylinder is provided with a reciprocating groove and a second inner ring groove. The convex post is slidably connected to the reciprocating groove. The second inner ring groove is slidably connected to the one-way mechanism. The connecting rod is fixedly connected to both the outer ring and the one-way valve. The air chamber is fixedly connected to both the third motor and the one-way valve. The output end of the third motor is fixedly connected to the one-way mechanism.

[0016] The third motor outputs a counterclockwise torque according to a preset value. When the torque transmission direction at the output end of the third motor is the specified clockwise direction, the one-way mechanism transmits the torque to the inner ring cylinder. Through the sliding connection between the reciprocating groove provided on the inner ring cylinder and the convex post on the outer ring, the rotation of the inner ring cylinder is converted into the reciprocating displacement of the outer ring along the axis of the main cylinder shell. By pushing open the one-way valve through the reciprocating displacement of the outer ring, when the one-way valve reciprocates and opens, river water enters the air chamber in batches, and the air in the air chamber is discharged. The weight of the diving mechanism gradually increases with the number of times river water enters. When it drops to the specified depth, the third motor stops outputting torque.

[0017] Further, the one-way mechanism includes a helical gear, a first wedge block, a first spring, and a first carriage. The helical gear is fixedly connected to the output end of the third motor. The first carriage is fixedly connected to the second inner annular groove. There are several groups of the first wedge block, the first spring, and the first carriage. The several groups of first wedge blocks are evenly distributed along the circumference of the second inner annular groove. The first wedge block contacts the helical gear and is slidably connected to both the second inner annular groove and the first carriage. The first spring is fixedly connected to the outer ring and the first wedge block.

[0018] The third motor outputs a clockwise torque according to a preset. The output end of the third motor drives the helical gear to rotate. The vertical tooth surface of the helical gear contacts the straight surface of the first wedge block. The helical gear drives the inner ring cylinder to rotate by pressing against the first carriage through the first wedge block. When the third motor outputs a counterclockwise torque according to a preset, the helical tooth surface of the helical gear contacts the inclined surface of the straight surface of the first wedge block. As the helical gear rotates, it pushes the first wedge block to displace along the first carriage, and the first wedge block compresses the first spring to complete reciprocation.

[0019] Further, the liquid sampling mechanism includes a carriage disc, a second spring, a second wedge block, a turntable, a sliding cylinder, a mounting frame, and a liquid collecting cylinder. The carriage disc is fixedly connected to the output end of the third motor. There are several groups of the second spring and the second wedge block. The several groups of second wedge blocks are evenly distributed along the circumference of the carriage disc. The second spring is fixedly connected to both the carriage disc and the second wedge block. The turntable is provided with an inner annular tooth groove and a third external thread. The second wedge block contacts the inner annular tooth groove. The sliding cylinder is provided with a fifth internal thread. The third external thread is threadedly connected to the fifth internal thread. The mounting frame is fixedly connected to the main cylinder shell. The sliding cylinder is slidably connected to the mounting frame. The sliding cylinder is fixedly connected to the liquid collecting cylinder. The liquid collecting cylinder is slidably connected to both the main cylinder shell and the bottom basket. The liquid collecting cylinder is provided with partitions and third through holes. There are several groups of the partitions and the third through holes. The several groups of partitions are linearly and evenly distributed along the axis of the liquid collecting cylinder. The several groups of third through holes are evenly distributed along the circumference of the side wall of the liquid collecting cylinder.

[0020] The wedge surfaces of the second wedge block and the first wedge block face in opposite directions. When the third motor outputs a clockwise torque, the inclined surface of the second wedge block contacts the helical tooth surface of the inner annular tooth groove. The inner annular tooth groove pushes the second wedge block to displace and compress the second spring in the carriage disc. When the sampling mechanism descends to the specified water depth, the third motor outputs a counterclockwise torque to the carriage disc according to a preset. The carriage disc rotates to make the straight surface of the second wedge block contact the vertical tooth surface of the inner annular tooth groove, and drives the turntable to rotate through the second wedge block. Through the threaded connection between the third external thread provided on the turntable and the fifth internal thread on the sliding cylinder, the rotation of the turntable is converted into the reciprocating sliding of the sliding cylinder along the axis of the mounting frame. The sliding cylinder pushes the liquid collecting cylinder to slide along the main cylinder shell and the bottom basket. When the liquid collecting cylinder slides to make the third through holes located between the main cylinder shell and the bottom basket, the river water enters the different liquid chambers separated by the partitions through the third through holes. As the third through holes are blocked by the bottom basket, the sampling and preservation of this water layer are completed.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention designs a diving mechanism, when the third motor output end transmits a torque in a prescribed clockwise direction, the third motor output end drives the bevel gear to rotate, the vertical tooth surface of the bevel gear contacts the straight surface of the first wedge block, and the bevel gear drives the inner ring cylinder to rotate, and the sliding connection between the reciprocating groove provided on the inner ring cylinder and the convex column on the outer ring is used to convert the rotation of the inner ring cylinder into the reciprocating displacement of the outer ring along the axis of the main cylinder shell, and the one-way valve is pushed open by the reciprocating displacement of the outer ring. When the one-way valve is reciprocatingly opened, river water enters the air chamber in batches, and the air in the air chamber is discharged. The diving mechanism begins to dive as a whole due to the gradually increasing weight of the river water entering the mechanism more times. The present invention controls the overall sampling mechanism to descend to a specified depth by controlling the water intake and exhaust volume; the present invention designs a liquid taking mechanism, and the third motor outputs a counterclockwise torque to a predetermined depth according to the preset value. The slide plate rotates so that the second wedge block directly contacts the vertical tooth surface of the inner ring tooth groove, driving the turntable to rotate, and the threaded connection between the third external thread set on the turntable and the fifth internal thread on the slide cylinder converts the rotation of the turntable into the reciprocating sliding of the slide cylinder along the axis of the assembly frame, and the slide cylinder pushes the liquid collecting cylinder to slide along the main cylinder shell and the bottom basket. When the liquid collecting cylinder slides to the third through hole between the main cylinder shell and the bottom basket, the river water enters the different liquid chambers separated by the partition through the third through hole. As the third through hole is blocked by the bottom basket, the sampling and preservation of the water layer is completed. The present invention can isolate and preserve sewage from different water layers; the present invention can sample sewage in the middle part of the river channel at the riverside, reducing the risk of sampling personnel falling into the water. The present invention can dive to different water depths in a direction to complete the stratified sampling and preservation of sewage from different water layers, thereby improving the accuracy of the sampled specimens. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the torque transmission mechanism of the present invention;

[0024] Figure 3 It is a schematic diagram of the telescopic mechanism structure of the present invention;

[0025] Figure 4 It is a partial cross-sectional view of the sampling mechanism of the present invention;

[0026] Figure 5 for Figure 4 A local enlarged schematic diagram of area A;

[0027] Figure 6 It is a schematic diagram of the structure of the liquid taking mechanism of the present invention;

[0028] Figure 7 It is a schematic diagram of the one-way mechanism structure of the present invention;

[0029] Figure 8 for Figure 6Schematic diagram of partial enlargement of area B.

[0030] In the figure: 1, chassis; 2, lifting mechanism; 21, base; 22, slide rail; 23, slide bar; 24, side frame; 25, second motor; 26, first worm; 27, torque transmission mechanism; 271, grip frame; 2711, first through hole; 2712, first inner ring groove; 272, rotating cylinder; 2721, external tooth ring groove; 2722, first internal thread; 273, tooth head rod; 3, first motor; 4, coupling; 5, telescopic mechanism; 51, second worm; 52, outer cylinder; 521, second through hole; 53, first inner cylinder; 531, second internal thread; 54, first sleeve; 541, first external thread; 55, second inner cylinder; 551, third internal thread; 56, second sleeve; 561, second external thread; 57, top cylinder; 571, fourth internal thread; 6, deflector wheel frame; 7, winch; 8, sampling mechanism; 81, steel cable; 82, diving mechanism; 821, outer ring; 8211, convex column; 822, inner ring cylinder; 8221, reciprocating groove; 8222, second inner ring groove; 823, one-way mechanism; 8231, helical gear; 8232, first wedge block; 8233, first spring; 8234, first sliding frame; 824, connecting rod; 825, one-way valve; 826, air chamber; 83, third motor; 84, main cylinder shell; 85, liquid extraction mechanism; 851, slide carriage plate; 852, second spring; 853, second wedge block; 854, turntable; 8541, inner ring tooth groove; 8542, third external thread; 855, sliding cylinder; 8551, fifth internal thread; 856, mounting frame; 857, liquid collection cylinder; 8571, partition board; 8572, third through hole; 86, bottom basket. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figure 1 shown, the technical solution of a sewage sampling device with a fixed-point collection function provided by the present invention includes a chassis 1, a lifting mechanism 2, a first motor 3, a coupling 4, a telescopic mechanism 5, a deflector wheel frame 6, a winch 7 and a sampling mechanism 8. The lifting mechanism 2, the first motor 3, the telescopic mechanism 5 and the winch 7 are all fixedly connected to the chassis 1. The coupling 4 is in transmission connection with the output end of the first motor 3 and the telescopic mechanism 5. The deflector wheel frame 6 is fixedly connected to the telescopic mechanism 5. The sampling mechanism 8 is fixedly connected to the winch 7. The sampling mechanism 8 is slidably connected to the deflector wheel frame 6.

[0033] This sampling device is used to take fixed-point samples of river sewage. Place this device beside the river. The lifting mechanism 2 lifts the chassis 1. The torque output by the first motor 3 passes through the coupling 4, and the coupling 4 transmits the torque to the telescopic mechanism 5. The telescopic mechanism 5 extends the steering wheel frame 6 above the sampling point in the river. At the same time, the winch 7 pays out the rope to lower the sampling mechanism 8. The sampling mechanism 8 floats on the river surface. Through the rotation mode set by the internal motor, the sampling mechanism 8 can dive downward to different water depths to complete the stratified sampling and preservation of sewage at different water layers. After the sampling mechanism 8 completes the preservation, the winch 7 winds up the rope to lift and recover the sampling mechanism 8.

[0034] As Figure 1 shown, the lifting mechanism 2 includes a base 21, a slide rail 22, a slide bar 23, a side frame 24, a second motor 25, a first worm 26 and a torque transmission mechanism 27. The base 21 is fixedly connected to both the slide rail 22 and the torque transmission mechanism 27. The slide bar 23 is fixedly connected to the chassis 1, and the slide bar 23 is slidably connected to the slide rail 22. The side frame 24 is fixedly connected to both the base 21 and the second motor 25. The torque transmission mechanism 27 is drivingly connected to the output end of the second motor 25 and the first worm 26, and the first worm 26 is rotatably connected to the chassis 1.

[0035] Fix the base 21 by inserting it into the ground. The second motor 25 outputs torque to the torque transmission mechanism 27. The torque transmission mechanism 27 changes the torque to make the first worm 26 rotate in a spiral. The first worm 26 spirally rotates upward to push the chassis 1, and the slide bar 23 slides along the slide rail 22, and the first worm 26 lifts the chassis 1.

[0036] As Figure 2 shown, the torque transmission mechanism 27 includes a grip frame 271, a rotating cylinder 272 and a toothed head rod 273. The grip frame 271 is fixedly connected to the base 21. The toothed head rod 273 is drivingly connected to the output end of the second motor 25. The grip frame 271 is provided with a first through hole 2711 and a first inner ring groove 2712. The first through hole 2711 is rotatably connected to the toothed head rod 273. The rotating cylinder 272 is slidably connected to the first inner ring groove 2712. The rotating cylinder 272 is provided with an external tooth ring groove 2721 and a first internal thread 2722. The external tooth ring groove 2721 meshes with the tooth surface of the toothed head rod 273, and the first internal thread 2722 is threadedly connected to the first worm 26.

[0037] The second motor 25 outputs torque to drive the toothed head rod 273 to rotate in the first through hole 2711. Through the meshing of the tooth surface of the toothed head rod 273 and the external tooth ring groove 2721, the torque of the toothed head rod 273 is changed, so that the rotating cylinder 272 rotates in the first inner ring groove 2712 around the axis of the first worm 26. Through the threaded connection between the first internal thread 2722 provided on the rotating cylinder 272 and the first worm 26, the rotation of the rotating cylinder 272 is changed into the upward spiral rotation of the first worm 26 along its axis.

[0038] As Figure 3As shown, the telescopic mechanism 5 includes a second worm 51, an outer cylinder 52, a first inner cylinder 53, a first sleeve 54, a second inner cylinder 55, a second sleeve 56 and a top cylinder 57. The outer cylinder 52 is fixedly connected to the base frame 1. The outer cylinder 52 is provided with a second through hole 521. The second worm 51 is rotatably connected to the second through hole 521. The second worm 51 is transmission-connected to the coupling 4. The first inner cylinder 53 is provided with a second internal thread 531. The second internal thread 531 is threadedly connected to the second worm 51. The first inner cylinder 53 is slidably connected to the outer cylinder 52 and the second inner cylinder 55. The first sleeve The tube 54 is slidably connected with the second worm 51, the first sleeve 54 is provided with a first external thread 541, the second inner tube 55 is provided with a third internal thread 551, the first external thread 541 and the third internal thread 551 are threadedly connected, the second sleeve 56 is slidably connected with the first external thread 541, the second sleeve 56 is provided with a second external thread 561, the top tube 57 is provided with a fourth internal thread 571, the second external thread 561 and the fourth internal thread 571 are threadedly connected, the top tube 57 is slidably connected with the second external thread 561, and the top tube 57 is fixedly connected to the changing wheel frame 6.

[0039] The output torque of the first motor 3 is transmitted to the second worm 51 through the coupling 4. The second worm 51 rotates in the second through hole 521. The first inner cylinder 53 slides along the axis of the outer cylinder 52 through the threaded connection between the second worm 51 and the second internal thread 531. The second worm 51 rotates and is driven to rotate by the convex block provided on the first sleeve 54. The second inner cylinder 55 slides along the axis of the first inner cylinder 53 through the threaded connection between the first external thread 541 and the third internal thread 551. The first external thread 541 is driven to rotate by the convex block provided on the second sleeve 56. The second sleeve 56 is transformed into a push cylinder 57 that slides along its axis through the threaded connection between the second external thread 561 and the fourth internal thread 571. The push cylinder 57 pushes out the changing wheel frame 6 to extend to the center of the river channel.

[0040] like Figure 4 As shown, the sampling mechanism 8 includes a steel cable 81, a diving mechanism 82, a third motor 83, a main cylinder shell 84, a liquid collection mechanism 85 and a bottom basket 86. The steel cable 81 is fixedly connected to the winch 7 and the diving mechanism 82. The steel cable 81 is slidably connected to the changing wheel frame 6. The diving mechanism 82 is fixedly connected to the third motor 83. The output end of the third motor 83 is fixedly connected to the diving mechanism 82 and the liquid collection mechanism 85. The main cylinder shell 84 is fixedly connected to the diving mechanism 82, the liquid collection mechanism 85 and the bottom basket 86. The liquid collection mechanism 85 is slidably connected to the bottom basket 86.

[0041] The steel cable 81 extends along the deflecting wheel frame 6 to the center of the river channel. The steel cable 81 is unreeled by the winch 7 so that the bottom basket 86 contacts the water surface of the river channel. The third motor 83 outputs torque according to a preset value. When the third motor 83 outputs a specified clockwise torque, the diving mechanism 82 absorbs water to increase the weight of the sampling mechanism 8, discharges the pre-stored gas inside, and the sampling mechanism 8 as a whole starts to dive. When it dives to the specified depth, the third motor 83 outputs a specified counterclockwise torque, and the liquid sampling mechanism 85 samples the sewage in the water layer at this depth and stores it in the bottom basket 86. This sampling mechanism 8 can dive to water layers at different depths in multiple batches for sampling in multiple batches. After completing the multiple sampling operations, the winch 7 reels in the steel cable 81 to lift the sampling mechanism 8 out of the water layer for recovery.

[0042] As Figure 5 shown, the diving mechanism 82 includes an outer ring 821, an inner ring cylinder 822, a one-way mechanism 823, a connecting rod 824, a one-way valve 825 and an air chamber 826. The outer ring 821 is slidably connected to the main cylinder shell 84. The outer ring 821 is provided with a convex column 8211. The inner ring cylinder 822 is provided with a reciprocating groove 8221 and a second inner ring groove 8222. The convex column 8211 is slidably connected to the reciprocating groove 8221. The second inner ring groove 8222 is slidably connected to the one-way mechanism 823. The connecting rod 824 is fixedly connected to both the outer ring 821 and the one-way valve 825. The air chamber 826 is fixedly connected to both the third motor 83 and the one-way valve 825. The output end of the third motor 83 is fixedly connected to the one-way mechanism 823.

[0043] The third motor 83 outputs a counterclockwise torque according to a preset value. When the torque transmission direction of the output end of the third motor 83 is the specified clockwise direction, the one-way mechanism 823 transmits the torque to the inner ring cylinder 822. Through the sliding connection between the reciprocating groove 8221 provided on the inner ring cylinder 822 and the convex column 8211 on the outer ring 821, the rotation of the inner ring cylinder 822 is converted into the reciprocating displacement of the outer ring 821 along the axis of the main cylinder shell 84. When the outer ring 821 reciprocates and pushes open the one-way valve 825, the river water enters the air chamber 826 in batches when the one-way valve 825 reciprocates and opens, and the air in the air chamber 826 is discharged. The weight of the diving mechanism 82 gradually increases with the number of times the river water enters. When it drops to the specified depth, the third motor 83 stops outputting torque.

[0044] As Figure 7As shown, the one-way mechanism 823 includes a helical gear 8231, a first wedge 8232, a first spring 8233, and a first carriage 8234. The helical gear 8231 is fixedly connected to the output end of the third motor 83. The first carriage 8234 is fixedly connected to the second inner annular groove 8222. There are several groups of the first wedge 8232, the first spring 8233, and the first carriage 8234. The several groups of the first wedges 8232 are evenly distributed along the circumference of the second inner annular groove 8222. The first wedge 8232 contacts the helical gear 8231. The first wedge 8232 is slidably connected to both the second inner annular groove 8222 and the first carriage 8234. The first spring 8233 is fixedly connected to the outer ring 821 and the first wedge 8232.

[0045] The third motor 83 outputs a clockwise torque according to a preset setting. The output end of the third motor 83 drives the helical gear 8231 to rotate. The vertical tooth surface of the helical gear 8231 contacts the straight surface of the first wedge 8232. The helical gear 8231 presses against the first carriage 8234 through the first wedge 8232 to drive the inner ring cylinder 822 to rotate. When the third motor 83 outputs a counterclockwise torque according to a preset setting, the helical tooth surface of the helical gear 8231 contacts the inclined surface of the straight surface of the first wedge 8232. As the helical gear 8231 rotates, it pushes the first wedge 8232 to displace along the first carriage 8234, and the first wedge 8232 compresses the first spring 8233 to complete reciprocation.

[0046] As Figure 6 、 Figure 8 shown, the liquid extraction mechanism 85 includes a carriage disc 851, a second spring 852, a second wedge 853, a turntable 854, a sliding cylinder 855, a mounting frame 856, and a liquid collecting cylinder 857. The carriage disc 851 is fixedly connected to the output end of the third motor 83. There are several groups of the second spring 852 and the second wedge 853. The several groups of the second wedges 853 are evenly distributed along the circumference of the carriage disc 851. The second spring 852 is fixedly connected to both the carriage disc 851 and the second wedge 853. The turntable 854 is provided with an inner annular tooth groove 8541 and a third external thread 8542. The second wedge 853 contacts the inner annular tooth groove 8541. The sliding cylinder 855 is provided with a fifth internal thread 8551. The third external thread 8542 is threadedly connected to the fifth internal thread 8551. The mounting frame 856 is fixedly connected to the main cylinder housing 84. The sliding cylinder 855 is slidably connected to the mounting frame 856. The sliding cylinder 855 is fixedly connected to the liquid collecting cylinder 857. The liquid collecting cylinder 857 is slidably connected to both the main cylinder housing 84 and the bottom basket 86. The liquid collecting cylinder 857 is provided with a partition 8571 and a third through hole 8572. There are several groups of both the partition 8571 and the third through hole 8572. The several groups of the partitions 8571 are linearly and evenly distributed along the axis of the liquid collecting cylinder 857. The several groups of the third through holes 8572 are evenly distributed along the circumference of the side wall of the liquid collecting cylinder 857.

[0047] The wedge surfaces of the second wedge block 853 and the first wedge block 8232 face in opposite directions. When the third motor 83 outputs a clockwise torque, the inclined surface of the second wedge block 853 contacts the helical tooth surface of the inner ring tooth groove 8541. The inner ring tooth groove 8541 pushes the second wedge block 853 to displace and compress the second spring 852 within the carriage plate 851. After the sampling mechanism 8 descends to the specified water depth, the third motor 83 outputs a counterclockwise torque to the carriage plate 851 according to a preset setting. The rotation of the carriage plate 851 causes the straight surface of the second wedge block 853 to contact the vertical tooth surface of the inner ring tooth groove 8541, driving the turntable 854 to rotate through the second wedge block 853. Through the threaded connection between the third external thread 8542 provided on the turntable 854 and the fifth internal thread 8551 on the sliding cylinder 855, the rotation of the turntable 854 is converted into the reciprocating sliding of the sliding cylinder 855 along the axis of the assembly frame 856. The sliding cylinder 855 pushes the liquid collection cylinder 857 to slide along the main cylinder shell 84 and the bottom basket 86. When the liquid collection cylinder 857 slides until the third through hole 8572 is located between the main cylinder shell 84 and the bottom basket 86, the river water enters the different liquid chambers separated by the partition plate 8571 through the third through hole 8572. As the third through hole 8572 is blocked by the bottom basket 86, the sampling and preservation of this water layer are completed.

[0048] Working principle of the present invention: This sampling device is used for fixed-point sampling of river sewage. The lifting mechanism 2 is used to lift the chassis 1. The torque output by the first motor 3 is transmitted to the telescopic mechanism 5 through the coupling 4. The steel cable 81 extends along the deflection wheel frame 6 to above the sampling point in the center of the river. The winch 7 pays out the steel cable 81 to lower the sampling mechanism 8. When the torque transmission direction of the output end of the third motor 83 is the specified clockwise direction, the output end of the third motor 83 drives the helical gear 8231 to rotate. The vertical tooth surface of the helical gear 8231 contacts the straight surface of the first wedge block 8232. The helical gear 8231 drives the inner ring cylinder 822 to rotate. Through the sliding connection between the reciprocating groove 8221 and the convex column 8211, the outer ring 821 is displaced reciprocally along the axis of the main cylinder shell 84 to push open the one-way valve 825, and the river water enters the air chamber 826 in batches to discharge air. As the number of times the river water enters gradually increases, the entire sampling mechanism 8 begins to dive. When it descends to the specified depth, the third motor 83 stops outputting torque. The wedge surface of the second wedge block 853 faces the opposite direction to that of the first wedge block 8232. The third motor 83 outputs a counterclockwise torque to the carriage plate 851 according to the preset. The rotation of the carriage plate 851 makes the straight surface of the second wedge block 853 contact the vertical tooth surface of the inner ring tooth groove 8541, driving the turntable 854 to rotate. Through the threaded connection between the third external thread 8542 and the fifth internal thread 8551, the sliding cylinder 855 pushes the liquid collection cylinder 857 to slide along the main cylinder shell 84 and the bottom basket 86. When the liquid collection cylinder 857 slides to the third through hole 8572 being located between the main cylinder shell 84 and the bottom basket 86, the river water enters different liquid chambers separated by the partition plate 8571 through the third through hole 8572. As the third through hole 8572 is blocked by the bottom basket 86, the sampling and preservation of this water layer are completed. The liquid sampling mechanism 85 samples the sewage in this depth water layer and stores it in the bottom basket 86. This sampling mechanism 8 can dive to water layers at different depths in multiple batches for sampling in multiple batches. After completing the multiple sampling operations, the winch 7 winds up the steel cable 81 to lift the sampling mechanism 8 out of the water layer for recovery.

[0049] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A sewage sampling device with a fixed-point sampling function, characterized in that: The sampling device includes a chassis (1), a lifting mechanism (2), a first motor (3), a coupling (4), a telescopic mechanism (5), a deflection wheel frame (6), a winch (7) and a sampling mechanism (8). The lifting mechanism (2), the first motor (3), the telescopic mechanism (5) and the winch (7) are all fixedly connected to the chassis (1). The coupling (4) is in transmission connection with the output end of the first motor (3) and the telescopic mechanism (5). The deflection wheel frame (6) is fixedly connected to the telescopic mechanism (5). The sampling mechanism (8) is fixedly connected to the winch (7), and the sampling mechanism (8) is slidably connected to the deflection wheel frame (6). The sampling mechanism (8) includes a steel cable (81), a diving mechanism (82), a third motor (83), a main cylinder shell (84), a liquid sampling mechanism (85) and a bottom basket (86). The steel cable (81) is fixedly connected to the winch (7) and the diving mechanism (82). The steel cable (81) is slidably connected to the deflection wheel frame (6). The diving mechanism (82) is fixedly connected to the third motor (83). The output end of the third motor (83) is fixedly connected to the diving mechanism (82) and the liquid sampling mechanism (85). The main cylinder shell (84) is fixedly connected to the diving mechanism (82), the liquid sampling mechanism (85) and the bottom basket (86). The liquid sampling mechanism (85) is slidably connected to the bottom basket (86).

2. The sewage sampling device with a fixed-point sampling function according to claim 1, characterized in that: The lifting mechanism (2) includes a base (21), a slide rail (22), a slide bar (23), a side frame (24), a second motor (25), a first worm (26) and a torque transmission mechanism (27). The base (21) is fixedly connected to the slide rail (22) and the torque transmission mechanism (27). The slide bar (23) is fixedly connected to the chassis (1). The slide bar (23) is slidably connected to the slide rail (22). The side frame (24) is fixedly connected to the base (21) and the second motor (25). The torque transmission mechanism (27) is in transmission connection with the output end of the second motor (25) and the first worm (26). The first worm (26) is rotatably connected to the chassis (1).

3. The sewage sampling device with a fixed-point sampling function according to claim 2, characterized in that: The torque transmission mechanism (27) includes a grip frame (271), a rotating cylinder (272) and a toothed head rod (273). The grip frame (271) is fixedly connected to the base (21). The toothed head rod (273) is in transmission connection with the output end of the second motor (25). The grip frame (271) is provided with a first through hole (2711) and a first inner ring groove (2712). The first through hole (2711) is rotatably connected to the toothed head rod (273). The rotating cylinder (272) is slidably connected to the first inner ring groove (2712). The rotating cylinder (272) is provided with an external tooth ring groove (2721) and a first internal thread (2722). The external tooth ring groove (2721) is in tooth surface engagement with the toothed head rod (273). The first internal thread (2722) is in threaded connection with the first worm (26).

4. The sewage sampling device with a fixed-point sampling function according to claim 1, wherein: The telescopic mechanism (5) includes a second worm (51), an outer cylinder (52), a first inner cylinder (53), a first sleeve (54), a second inner cylinder (55), a second sleeve (56) and a top cylinder (57). The outer cylinder (52) is fixedly connected to the chassis (1). A second through hole (521) is provided on the outer cylinder (52). The second worm (51) is rotatably connected to the second through hole (521). The second worm (51) is drivingly connected to the coupling (4). A second internal thread (531) is provided on the first inner cylinder (53). The second internal thread (531) is threadedly connected to the second worm (51). The first inner cylinder (53) is slidably connected to both the outer cylinder (52) and the second inner cylinder (55). The first sleeve (54) is slidably connected to the second worm (51). A first external thread (541) is provided on the first sleeve (54). A third internal thread (551) is provided on the second inner cylinder (55). The first external thread (541) is threadedly connected to the third internal thread (551). The second sleeve (56) is slidably connected to the first external thread (541). A second external thread (561) is provided on the second sleeve (56). A fourth internal thread (571) is provided on the top cylinder (57). The second external thread (561) is threadedly connected to the fourth internal thread (571). The top cylinder (57) is slidably connected to the second external thread (561). The top cylinder (57) is fixedly connected to the deflector wheel frame (6).

5. The sewage sampling device with a fixed-point sampling function according to claim 1, characterized in that: The diving mechanism (82) includes an outer ring (821), an inner ring cylinder (822), a one-way mechanism (823), a connecting rod (824), a one-way valve (825) and an air chamber (826). The outer ring (821) is slidably connected to the main cylinder housing (84). A convex column (8211) is provided on the outer ring (821). A reciprocating groove (8221) and a second inner ring groove (8222) are provided on the inner ring cylinder (822). The convex column (8211) is slidably connected to the reciprocating groove (8221). The second inner ring groove (8222) is slidably connected to the one-way mechanism (823). The connecting rod (824) is fixedly connected to both the outer ring (821) and the one-way valve (825). The air chamber (826) is fixedly connected to both the third motor (83) and the one-way valve (825). The output end of the third motor (83) is fixedly connected to the one-way mechanism (823).

6. The sewage sampling device with a fixed-point sampling function according to claim 5, characterized in that: The one-way mechanism (823) includes a helical gear (8231), a first wedge block (8232), a first spring (8233), and a first carriage (8234). The helical gear (8231) is fixedly connected to the output end of the third motor (83). The first carriage (8234) is fixedly connected to the second inner ring groove (8222). The first wedge block (8232), the first spring (8233), and the first carriage (8234) are all provided with several groups. The several groups of the first wedge blocks (8232) are evenly distributed along the circumference of the second inner ring groove (8222). The first wedge block (8232) contacts the helical gear (8231). The first wedge block (8232) is slidably connected to both the second inner ring groove (8222) and the first carriage (8234). The first spring (8233) is fixedly connected to the outer ring (821) and the first wedge block (8232).

7. The sewage sampling device with a fixed-point sampling function according to claim 1, characterized in that: The liquid extraction mechanism (85) includes a carriage disk (851), a second spring (852), a second wedge block (853), a turntable (854), a sliding cylinder (855), an assembly frame (856), and a liquid collection cylinder (857). The carriage disk (851) is fixedly connected to the output end of the third motor (83). The second spring (852) and the second wedge block (853) are both provided with several groups. The several groups of the second wedge blocks (853) are evenly distributed along the circumference of the carriage disk (851). The second spring (852) is fixedly connected to both the carriage disk (851) and the second wedge block (853). The turntable (854) is provided with an inner ring tooth groove (8541) and a third external thread (8542). The second wedge block (853) contacts the inner ring tooth groove (8541). The sliding cylinder (855) is provided with a fifth internal thread (8551). The third external thread (8542) is threadedly connected to the fifth internal thread (8551). The assembly frame (856) is fixedly connected to the main cylinder shell (84). The sliding cylinder (855) is slidably connected to the assembly frame (856). The sliding cylinder (855) is fixedly connected to the liquid collection cylinder (857). The liquid collection cylinder (857) is slidably connected to both the main cylinder shell (84) and the bottom basket (86). The liquid collection cylinder (857) is provided with a partition plate (8571) and a third through hole (8572). The partition plate (8571) and the third through hole (8572) are both provided with several groups. The several groups of the partition plates (8571) are linearly and evenly distributed along the axis of the liquid collection cylinder (857). The several groups of the third through holes (8572) are evenly distributed along the circumference of the side wall of the liquid collection cylinder (857).

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