Pretreatment device for drug residue detection

Abstract

The invention provides a pretreatment device for drug residue detection, and relates to the technical field of water pollution detection. A connecting unit is mounted on the sampling unit; two groups of positioning units are mounted on the sampling unit; a water inlet unit is mounted at the bottom of the sampling unit; a driving unit is mounted on the sampling unit and the connecting unit and is used for improving the water inlet effect of the water inlet unit; a control unit is mounted on the connecting unit and is used for controlling the falling position of the sampling unit; it is guaranteed that a worker can regularly observe the conditions of the inner walls of the sampling lower shell, the sampling upper shell and the circle of impurity filter screen, and impurities on the sampling lower shell, the sampling upper shell and the circle of impurity filter screen can be conveniently cleaned in time; the problem that a worker cannot regularly observe whether many impurities exist in the inner wall of the sampling structure or not, so that the impurities on the inner wall easily affect the sampling precision next time, and the detection result is not accurate enough is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of water pollution detection, and more specifically, particularly relates to a pretreatment device for drug residue detection. Background Art

[0002] Drug residues in water sources not only affect human health but also damage the ecological environment. Detecting drug residues in water sources is an important means to ensure that water quality meets safety standards; sampling is the initial step in the pretreatment of water pollution detection, and representative water samples need to be selected.

[0003] Currently, the following problems still exist in the pretreatment devices used in water pollution detection: 1. Staff cannot regularly observe whether there are many impurities in the inner wall of the sampling structure, resulting in the impurities on the inner wall being likely to affect the next sampling accuracy, causing inaccurate detection results; 2. Aquatic plants or floating objects in the water source will adhere to the water inlet holes, causing the water inlet holes to be easily blocked, affecting the normal entry of the water source, and increasing the sampling time of the water source; 3. Generally, there is only one sampling method, which is not convenient for staff to appropriately adjust the sampling method according to the situation of the sampling area, reducing the sampling accuracy. Summary of the Invention

[0004] The embodiments of the present disclosure relate to a pretreatment device for drug residue detection, which has a sampling unit, a connection unit, a positioning unit, a water inlet unit, a driving unit, and a control unit; it ensures that staff can regularly observe the conditions of the inner walls of the sampling lower shell, the sampling upper shell, and a circle of impurity filters, facilitating the timely cleaning of impurities on the sampling lower shell, the sampling upper shell, and the impurity filters; it ensures that there are no aquatic plants or floating objects at the water inlet holes of the sealing part, ensuring that part of the water inlet hole area is in a clean state; it can appropriately adjust the sampling method according to the situation of the sampling area; and it solves the problems of being unable to regularly observe whether there are many impurities in the inner wall of the sampling structure, aquatic plants or floating objects in the water source adhering to the water inlet holes, and it is not convenient for staff to appropriately adjust the sampling method according to the situation of the sampling area.

[0005] In the first aspect of the present disclosure, a pretreatment device for drug residue detection is provided, including a sampling unit; a connection unit is installed on the sampling unit; two groups of positioning units are installed on the sampling unit, and the two groups of positioning units are used to position the connection unit, and the two groups of positioning units are also used to position the sampling unit; A water inlet unit is installed at the bottom of the sampling unit; a driving unit is installed on the sampling unit and the connection unit, and the driving unit is used to improve the water inlet effect of the water inlet unit; a control unit is installed on the connection unit, and the control unit is used to control the falling position of the sampling unit.

[0006] In at least some embodiments, the sampling unit includes: a sampling lower housing, a sampling upper housing, a solid counterweight ring, and an impurity filter screen; two arc-shaped limiting grooves are formed in the sampling lower housing; the sampling upper housing is threadedly connected to the top of the sampling lower housing; the solid counterweight ring is fixedly installed inside the sampling lower housing; the impurity filter screen is provided in a circle, and the circle of impurity filter screens is fixedly installed on the sampling upper housing.

[0007] In at least some embodiments, the connecting unit includes: a movable connecting frame; the movable connecting frame is slidably installed on the sampling upper housing, a row of inclined positioning grooves are formed at the center of the movable connecting frame, and an inclined water inlet groove is formed at the bottom end of the movable connecting frame.

[0008] In at least some embodiments, the connecting unit further includes: a limiting baffle A and a spiral spring A; the limiting baffle A is fixedly installed outside the movable connecting frame; the spiral spring A is sleeved outside the movable connecting frame, and the spiral spring A is located between the sampling upper housing and the limiting baffle A.

[0009] In at least some embodiments, the positioning unit includes: a movable positioning rod, a limiting baffle B, and a spiral spring B; the movable positioning rod is slidably installed on the sampling upper housing, and the inner end of the movable positioning rod contacts the corresponding inclined positioning groove; the limiting baffle B is fixedly installed outside the movable positioning rod; the spiral spring B is sleeved outside the movable positioning rod, and the spiral spring B is located between the sampling upper housing and the limiting baffle B.

[0010] In at least some embodiments, the positioning unit further includes: a positioning sphere and a spiral spring C; the positioning sphere is slidably installed on the limiting baffle B, and the bottom of the positioning sphere is inserted into the arc-shaped limiting groove; the spiral spring C is fixedly installed on the top of the positioning sphere, and the top of the spiral spring C is fixedly connected to the limiting baffle B.

[0011] In at least some embodiments, the water inlet unit includes: a conical water inlet cover and a movable sealing frame; the conical water inlet cover is fixedly installed at the bottom of the sampling lower housing, and multiple circles of water inlet round holes are formed in the conical water inlet cover; the movable sealing frame is rotatably installed on the inner wall of the conical water inlet cover.

[0012] In at least some embodiments, the driving unit includes: a storage battery, a controller, and a waterproof motor; the storage battery is fixedly installed on the top of the sampling upper housing; the controller is fixedly installed on the top of the sampling upper housing, and the controller is also electrically connected to the storage battery; the waterproof motor is fixedly installed at the bottom end of the movable connecting frame, and the waterproof motor is also electrically connected to the controller.

[0013] In at least some embodiments, the driving unit further includes: a rubber connection disk, a start button, and a pause button; the rubber connection disk is fixedly installed on the output shaft of the waterproof motor, and the bottom of the rubber connection disk is in close contact with the movable seal frame; the start button is fixedly installed on the top of the sampling upper shell, and the start button is also electrically connected to the controller; the pause button is fixedly installed on the top of the limit baffle A, and the pause button is also electrically connected to the controller.

[0014] In at least some embodiments, the control unit includes: a movable connector, a hollow grip rod, an anti-slip rubber sleeve, and a connecting steel wire rope; the movable connector is rotatably installed on the movable connection frame; the hollow grip rod is threadedly connected to the movable connector; the anti-slip rubber sleeve is fixedly installed at the top of the hollow grip rod; the connecting steel wire rope is disposed inside the hollow grip rod, and the bottom of the connecting steel wire rope is fixedly connected to the movable connector, and the top of the connecting steel wire rope is fixedly connected to the hollow grip rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the sampling unit is not in contact with the water source in the present invention, there is a gap between the sampling lower shell and the inclined water inlet groove; when the sampling unit is in contact with the water source, under the action of gravity, the water source enters the sampling lower shell through the gap between the sampling lower shell and the inclined water inlet groove; when the sampling unit is separated from the water source, under the action of its own gravity plus the gravity of the water sample, the sampling unit will also slide down a certain distance, causing the inclined water inlet groove to move into the sampling lower shell, and the bottom end of the movable connection frame and the bottom circular hole of the sampling lower shell play a sealing role to prevent the water sample after sampling from flowing out; the setting of the two positioning spheres plays an auxiliary positioning role for the sampling lower shell, preventing the sampling lower shell from loosening from the sampling upper shell, so that the sampling lower shell and the sampling upper shell can only rotate after being stressed. In addition, after the sampling unit is separated from the water source, when the sampling unit continues to slide downward for a certain distance, the corresponding inclined positioning grooves can push the two movable positioning rods to move outward automatically. When the downward sliding of the sampling unit is completed, the two movable positioning rods continue to be inserted into the corresponding inclined positioning grooves under the action of the two helical springs B, playing a limiting role on the movable connecting frame. When the staff separates the sampling lower shell from the sampling upper shell and then pulls the two limit baffles B outward simultaneously, the two movable positioning rods are automatically separated from the corresponding inclined positioning grooves, and the movable connecting frame automatically resets under the action of the helical spring A, creating a gap between the sampling lower shell and the inclined water inlet groove again for convenient use next time. When the staff does not separate the sampling lower shell from the sampling upper shell, it is impossible to pull the two limit baffles B outward, resulting in no gap between the sampling lower shell and the inclined water inlet groove, and normal sampling cannot be carried out next time. This ensures that the staff can regularly observe the conditions of the sampling lower shell, the sampling upper shell, and the inner wall of the impurity filter net in a circle, facilitating the timely cleaning of the impurities on the sampling lower shell, the sampling upper shell, and the impurity filter net in a circle, and avoiding affecting the subsequent sampling accuracy.

[0016] 2. The setting of the movable sealing frame of the present invention plays a sealing role for some water inlet round holes, so that there will be no waterweeds or floating objects at the water inlet round holes in the sealed part (the waterweeds or floating objects outside the conical water inlet cover will flow towards the direction of the unsealed water inlet round holes under the action of the water flow force), ensuring that the area of some water inlet round holes is in a clean state. When the staff presses the start button, the controller controls the waterproof motor to rotate intermittently. In addition, when the controller controls the waterproof motor to rotate intermittently, the angle of the movable sealing frame changes, enabling the water source to enter through the water inlet round holes in other directions. At this time, the waterweeds or floating objects outside the conical water inlet cover will still flow towards the direction of the unsealed water inlet round holes under the action of the water flow force, preventing the waterweeds or floating objects from blocking the water inlet holes and improving the sampling efficiency. When the sampling unit is separated from the water source, the sampling upper shell or the corresponding impurity filter net can automatically press the pause button to achieve the automatic shutdown of the waterproof motor.

[0017] 3. The setting of the hollow gripping rod of the present invention facilitates the staff to place the sampling unit in a relatively narrow water source. When the water source to be sampled is relatively wide, the staff rotates the hollow gripping rod to separate it from the movable connection head. Then, one hand of the staff holds the hollow gripping rod, and the other hand holds the movable connecting frame and the movable connection head. Then, the sampling unit is thrown into the water source in the distance, enabling the sampling unit to be close to the center of the water source, improving the sampling accuracy, and being able to appropriately adjust the sampling method according to the situation of the sampling area. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below.

[0019] The accompanying drawings in the following description relate only to some embodiments of the present invention and do not limit the present invention.

[0020] In the accompanying drawings: Figure 1 A three-dimensional structural schematic diagram of the present invention is shown; Figure 2 A structural schematic diagram of the sampling unit of the present invention is shown; Figure 3 A structural schematic diagram of the connection unit of the present invention is shown; Figure 4 A structural schematic diagram of the positioning unit of the present invention is shown; Figure 5 A schematic diagram of the Figure 1 central sectional structure of the present invention is shown; Figure 6 A schematic diagram of the Figure 5 locally enlarged structure of area A in the present invention is shown; Figure 7 A schematic diagram of the Figure 1 bottom perspective structure of the present invention is shown; Figure 8 A structural schematic diagram of the water inlet unit of the present invention is shown; Figure 9 A schematic diagram of the Figure 5 locally enlarged structure of area B in the present invention is shown; Figure 10 A schematic diagram of the Figure 5 locally enlarged structure of area C in the present invention is shown.

[0021] List of reference numerals: 100, sampling unit; 101, sampling lower housing; 1011, arc-shaped limiting groove; 102, sampling upper housing; 103, solid counterweight ring; 104, impurity filter screen; 200, connection unit; 201, movable connection frame; 2011, inclined positioning groove; 2012, inclined water inlet groove; 202, limiting baffle A; 203, helical spring A; 300, positioning unit; 301, movable positioning rod; 302, limiting baffle B; 303, helical spring B; 304, positioning sphere; 305, helical spring C; 400, water inlet unit; 401, conical water inlet cover; 4011, water inlet round hole; 402, movable sealing frame; 500, drive unit; 501, storage battery; 502, controller; 503, waterproof motor; 504, rubber connection disk; 505, start button; 506, pause button; 600. Control unit; 601. Movable connector; 602. Hollow gripping rod; 603. Anti-slip rubber sleeve; 604. Connecting wire rope. Detailed implementation manner

[0022] In order to make the objectives, solutions, and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the ordinary meanings in the art. The same reference numerals in the drawings represent the same components.

[0023] Embodiment: Please refer to Figures 1 to 10 As shown in the figure: The present invention provides a pretreatment device for drug residue detection, including a sampling unit 100; a connecting unit 200 is installed on the sampling unit 100; two positioning units 300 are installed on the sampling unit 100, and the two positioning units 300 are used to position the connecting unit 200, and the two positioning units 300 are also used to position the sampling unit 100; a water inlet unit 400 is installed at the bottom of the sampling unit 100; a driving unit 500 is installed on the sampling unit 100 and the connecting unit 200, and the driving unit 500 is used to improve the water inlet effect of the water inlet unit 400; a control unit 600 is installed on the connecting unit 200, and the control unit 600 is used to control the falling position of the sampling unit 100.

[0024] In the embodiments of the present disclosure, as Figure 2 shown, the sampling unit 100 includes: a sampling lower shell 101, a sampling upper shell 102, a solid counterweight ring 103, and an impurity filter net 104; two arc-shaped limiting grooves 1011 are formed on the sampling lower shell 101; the sampling upper shell 102 is threadedly connected to the top of the sampling lower shell 101; the solid counterweight ring 103 is fixedly installed inside the sampling lower shell 101; a circle of impurity filter nets 104 is provided, and a circle of impurity filter nets 104 is fixedly installed on the sampling upper shell 102; Its specific functions are as follows: Since a circle of impurity filter nets 104 is fixedly installed on the sampling upper shell 102, it plays a role in filtering the sundries in the water sample after sampling, so that there will be no large impurities in the water sample; and because the sampling upper shell 102 is threadedly connected to the top of the sampling lower shell 101, it is convenient for the staff to separate the sampling lower shell 101 from the sampling upper shell 102, and it is convenient to clean the inner walls of the sampling lower shell 101 and the sampling upper shell 102.

[0025] In the embodiments of the present disclosure, as Figure 3 、 Figure 4 and Figure 6As shown in the figure, the connection unit 200 includes: a movable connection frame 201; the movable connection frame 201 is slidably mounted on the sampling upper shell 102, and a row of inclined positioning grooves 2011 are formed at the center of the movable connection frame 201, and an inclined water inlet groove 2012 is formed at the bottom end of the movable connection frame 201; the connection unit 200 further includes: a limit baffle A 202 and a spiral spring A 203; the limit baffle A 202 is fixedly mounted on the outside of the movable connection frame 201; the spiral spring A 203 is sleeved on the outside of the movable connection frame 201, and the spiral spring A 203 is located between the sampling upper shell 102 and the limit baffle A 202; The positioning unit 300 includes: a movable positioning rod 301, a limit baffle B 302 and a spiral spring B 303; the movable positioning rod 301 is slidably mounted on the sampling upper shell 102, and the inner end of the movable positioning rod 301 is in contact with the corresponding inclined positioning groove 2011; the limit baffle B 302 is fixedly mounted on the outside of the movable positioning rod 301; the spiral spring B 303 is sleeved on the outside of the movable positioning rod 301, and the spiral spring B 303 is located between the sampling upper shell 102 and the limit baffle B 302; the positioning unit 300 further includes: a positioning sphere 304 and a spiral spring C 305; the positioning sphere 304 is slidably mounted on the limit baffle B 302, and the bottom of the positioning sphere 304 is inserted into the arc-shaped limit groove 1011; the spiral spring C 305 is fixedly mounted on the top of the positioning sphere 304, and the top of the spiral spring C 305 is fixedly connected to the limit baffle B 302; Its specific function is as follows: Since the movable connection frame 201 is slidably mounted on the sampling upper shell 102, and the spiral spring A 203 is sleeved on the outside of the movable connection frame 201, and the spiral spring A 203 is located between the sampling upper shell 102 and the limit baffle A 202, when the sampling unit 100 is not in contact with the water source, there is a gap between the sampling lower shell 101 and the inclined water inlet groove 2012; when the sampling unit 100 is in contact with the water source, under the action of gravity, the water source enters the sampling lower shell 101 through the gap between the sampling lower shell 101 and the inclined water inlet groove 2012; when the sampling unit 100 is separated from the water source, under its own gravity plus the gravity of the water sample, the sampling unit 100 will also slide down a certain distance, so that the inclined water inlet groove 2012 moves into the sampling lower shell 101, and the bottom end of the movable connection frame 201 and the bottom circular hole of the sampling lower shell 101 play a sealing role to prevent the water sample after sampling from flowing out; also, since two arc-shaped limit grooves 1011 are formed on the sampling lower shell 101, and the two positioning spheres 304 are slidably mounted on the two limit baffles B 302, and the bottoms of the two positioning spheres 304 are inserted into the two arc-shaped limit grooves 1011, it plays an auxiliary positioning role for the sampling lower shell 101 to prevent the sampling lower shell 101 from loosening from the sampling upper shell 102, so that the sampling lower shell 101 and the sampling upper shell 102 can only rotate after being stressed; In addition, since the two movable positioning rods 301 are slidably mounted on the sampling upper housing 102, and the inner ends of the two movable positioning rods 301 are in contact with the corresponding inclined positioning grooves 2011, and the two helical springs B303 are located between the sampling upper housing 102 and the two limit baffles B302. After the sampling unit 100 is separated from the water source, when the sampling unit 100 continues to slide downward for a certain distance, the corresponding inclined positioning grooves 2011 can push the two movable positioning rods 301 to move outward automatically. When the downward sliding of the sampling unit 100 is completed, the two movable positioning rods 301 continue to be inserted into the corresponding inclined positioning grooves 2011 under the action of the two helical springs B303, playing a limiting role on the movable connecting frame 201; when the staff separates the sampling lower housing 101 from the sampling upper housing 102 and then pulls the two limit baffles B302 outward simultaneously, the two movable positioning rods 301 are automatically separated from the corresponding inclined positioning grooves 2011, and the movable connecting frame 201 is automatically reset under the action of the helical spring A203, creating a gap between the sampling lower housing 101 and the inclined water inlet groove 2012 again for convenient use next time; when the staff does not separate the sampling lower housing 101 from the sampling upper housing 102, it is impossible to pull the two limit baffles B302 outward, resulting in no gap between the sampling lower housing 101 and the inclined water inlet groove 2012, and normal sampling cannot be carried out next time. This ensures that the staff can regularly observe the conditions of the inner walls of the sampling lower housing 101, the sampling upper housing 102, and the impurity filter net 104 in a circle, facilitating the timely cleaning of the impurities on the sampling lower housing 101, the sampling upper housing 102, and the impurity filter net 104 in a circle, and avoiding affecting the subsequent sampling accuracy.

[0026] In the embodiment of the present disclosure, as Figure 1 , Figure 8 , Figure 9 and Figure 10 shown, the water inlet unit 400 includes: a conical water inlet cover 401 and a movable sealing frame 402; the conical water inlet cover 401 is fixedly installed at the bottom of the sampling lower housing 101, and a plurality of circles of water inlet round holes 4011 are provided on the conical water inlet cover 401; the movable sealing frame 402 is rotatably installed on the inner wall of the conical water inlet cover 401; The drive unit 500 includes: a storage battery 501, a controller 502, and a waterproof motor 503; the storage battery 501 is fixedly installed on the top of the sampling upper housing 102; the controller 502 is fixedly installed on the top of the sampling upper housing 102, and the controller 502 is also electrically connected to the storage battery 501; the waterproof motor 503 is fixedly installed at the bottom end of the movable connection frame 201, and the waterproof motor 503 is also electrically connected to the controller 502; the drive unit 500 further includes: a rubber connection disk 504, a start button 505, and a pause button 506; the rubber connection disk 504 is fixedly installed on the output shaft of the waterproof motor 503, and the bottom of the rubber connection disk 504 is in close contact with the movable seal frame 402; the start button 505 is fixedly installed on the top of the sampling upper housing 102, and the start button 505 is also electrically connected to the controller 502; the pause button 506 is fixedly installed on the top of the limit baffle A202, and the pause button 506 is also electrically connected to the controller 502; Its specific function is as follows: Since the conical water inlet cover 401 is fixedly installed at the bottom of the sampling lower housing 101, and a plurality of circles of water inlet round holes 4011 are formed in the conical water inlet cover 401, and the movable seal frame 402 is rotatably installed on the inner wall of the conical water inlet cover 401, which seals part of the water inlet round holes 4011, so that there will be no waterweeds or floating objects at the sealed part of the water inlet round holes 4011 (the waterweeds or floating objects outside the conical water inlet cover 401 will flow towards the direction of the unsealed water inlet round holes 4011 under the action of the water flow force), ensuring that the area of part of the water inlet round holes 4011 is in a clean state; and because the rubber connection disk 504 is fixedly installed on the output shaft of the waterproof motor 503, and the bottom of the rubber connection disk 504 is in close contact with the movable seal frame 402, when the staff presses the start button 505, the controller 502 controls the waterproof motor 503 to rotate intermittently; In addition, when the controller 502 controls the waterproof motor 503 to rotate intermittently, the angle of the movable seal frame 402 changes, so that water enters through the water inlet round holes 4011 in other directions. At this time, the waterweeds or floating objects outside the conical water inlet cover 401 will still flow towards the direction of the unsealed water inlet round holes 4011 under the action of the water flow force, avoiding the blockage of the water inlet holes by waterweeds or floating objects and improving the sampling efficiency; and because the pause button 506 is fixedly installed on the top of the limit baffle A202, when the sampling unit 100 is separated from the water source, the sampling upper housing 102 or the corresponding impurity filter net 104 can automatically press the pause button 506 to realize the automatic shutdown of the waterproof motor 503.

[0027] In the embodiment of the present disclosure, such as Figure 1 and Figure 10As shown in the figure, the control unit 600 includes: a movable connector 601, a hollow grip rod 602, an anti-slip rubber sleeve 603, and a connecting steel wire rope 604; the movable connector 601 is rotatably mounted on the movable connection frame 201; the hollow grip rod 602 is threadedly connected to the movable connector 601; the anti-slip rubber sleeve 603 is fixedly mounted on the top end of the hollow grip rod 602; the connecting steel wire rope 604 is disposed inside the hollow grip rod 602, and the bottom of the connecting steel wire rope 604 is fixedly connected to the movable connector 601, and the top of the connecting steel wire rope 604 is fixedly connected to the hollow grip rod 602; Its specific function is as follows: Since the movable connector 601 is rotatably mounted on the movable connection frame 201, the hollow grip rod 602 is threadedly connected to the movable connector 601, and the anti-slip rubber sleeve 603 is fixedly mounted on the top end of the hollow grip rod 602, it is convenient for the staff to place the sampling unit 100 in a relatively narrow water source; and because the bottom of the connecting steel wire rope 604 is fixedly connected to the movable connector 601, and the top of the connecting steel wire rope 604 is fixedly connected to the hollow grip rod 602, when the water source to be sampled is relatively wide, the staff rotates the hollow grip rod 602 to separate the hollow grip rod 602 from the movable connector 601. Then, the staff holds the hollow grip rod 602 with one hand and holds the movable connection frame 201 and the movable connector 601 with the other hand, and then throws the sampling unit 100 into the water source in the distance, so that the sampling unit 100 can be close to the center of the water source, improving the sampling accuracy and being able to appropriately adjust the sampling method according to the situation of the sampling area; Among them, the throwing distance of the sampling unit 100 should be less than the length of the connecting steel wire rope 604, and the length of the connecting steel wire rope 604 can be appropriately determined according to the use requirements.

[0028] The specific usage mode and function of this embodiment: When the present invention is in use, first, the length of the connecting wire rope 604 is appropriately determined according to the usage requirements, and then the start button 505 is pressed. When the water source to be sampled is narrow, the staff places the sampling unit 100 in the narrow water source through the hollow gripping rod 602. When the water source to be sampled is wide, the staff rotates the hollow gripping rod 602 to separate the hollow gripping rod 602 from the movable connection head 601. Then, one hand of the staff holds the hollow gripping rod 602, and the other hand holds the movable connection frame 201 and the movable connection head 601. Then, the sampling unit 100 is thrown into the water source in the distance, so that the sampling unit 100 can be close to the center of the water source, improving the sampling accuracy and being able to appropriately adjust the sampling method according to the situation of the sampling area; the setting of the movable sealing frame 402 seals some of the water inlet round holes 4011, so that there will be no waterweeds or floating objects at the sealed water inlet round holes 4011 (the waterweeds or floating objects outside the conical water inlet cover 401 will flow towards the unsealed water inlet round holes 4011 under the action of the water flow force), ensuring that the area of some of the water inlet round holes 4011 is in a clean state; when the controller 502 controls the waterproof motor 503 to rotate intermittently, the angle of the movable sealing frame 402 changes, so that the water source enters through the water inlet round holes 4011 in other directions. At this time, the waterweeds or floating objects outside the conical water inlet cover 401 will still flow towards the unsealed water inlet round holes 4011 under the action of the water flow force, avoiding the blockage of the water inlet holes by waterweeds or floating objects and improving the sampling efficiency; when the sampling unit 100 is not in contact with the water source, there is a gap between the sampling lower shell 101 and the inclined water inlet groove 2012; when the sampling unit 100 is in contact with the water source, under the action of gravity, the water source enters the sampling lower shell 101 through the gap between the sampling lower shell 101 and the inclined water inlet groove 2012; when the sampling unit 100 is separated from the water source, under the action of its own gravity plus the gravity of the water sample, the sampling unit 100 will slide down a certain distance, so that the inclined water inlet groove 2012 moves into the sampling lower shell 101, and the bottom end of the movable connection frame 201 and the bottom round hole of the sampling lower shell 101 play a sealing role, preventing the water sample after sampling from flowing out; the setting of the two positioning spheres 304 plays an auxiliary positioning role for the sampling lower shell 101, preventing the sampling lower shell 101 from loosening from the sampling upper shell 102, so that the sampling lower shell 101 and the sampling upper shell 102 can only rotate when a force is applied; when the sampling unit 100 is separated from the water source and continues to slide down a certain distance, the corresponding inclined positioning grooves 2011 can push the two movable positioning rods 301 to automatically move outwards. When the downward sliding of the sampling unit 100 is completed, the two movable positioning rods 301 continue to be inserted into the corresponding inclined positioning grooves 2011 under the action of the two spiral springs B303, playing a limiting role for the movable connection frame 201;When the staff separates the sampling lower housing 101 from the sampling upper housing 102 and then pulls the two limit baffles B302 outwards simultaneously, the two movable positioning rods 301 are automatically separated from the corresponding inclined positioning grooves 2011, and the movable connecting frame 201 automatically resets under the action of the helical spring A203, creating a gap again between the sampling lower housing 101 and the inclined water inlet groove 2012 for convenient use next time; when the staff does not separate the sampling lower housing 101 from the sampling upper housing 102, it is impossible to pull the two limit baffles B302 outwards, resulting in no gap between the sampling lower housing 101 and the inclined water inlet groove 2012, and normal sampling cannot be carried out next time. This ensures that the staff can regularly observe the conditions of the inner walls of the sampling lower housing 101, the sampling upper housing 102, and the impurity filter net 104 in a circle, facilitating the timely cleaning of impurities on the sampling lower housing 101, the sampling upper housing 102, and the impurity filter net 104 in a circle, and avoiding affecting the subsequent sampling accuracy; when the sampling unit 100 is separated from the water source, the sampling upper housing 102 or the corresponding impurity filter net 104 can automatically press the pause button 506 to achieve the automatic shutdown of the waterproof motor 503; In this article, the following points need to be noted: 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0029] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0030] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A pre-processing device for drug residue detection, comprising a sampling unit (100); characterized in that: The sampling unit (100) is mounted with a connection unit (200); the sampling unit (100) is mounted with two sets of positioning units (300), the two sets of positioning units (300) are used to position the connection unit (200), and the two sets of positioning units (300) are also used to position the sampling unit (100); A water inlet unit (400) is installed at the bottom of the sampling unit (100); a driving unit (500) is installed on the sampling unit (100) and the connecting unit (200), and the driving unit (500) is used to improve the water inlet effect of the water inlet unit (400); and a control unit (600) is installed on the connecting unit (200), and the control unit (600) is used to control the falling position of the sampling unit (100).

2. A pre-processing device for drug residue detection according to claim 1, characterized in that: The sampling unit (100) comprises: a sampling lower shell (101), a sampling upper shell (102), a solid counterweight ring (103) and an impurity filter (104); the sampling lower shell (101) is provided with two arc-shaped limit grooves (1011); the sampling upper shell (102) is threadedly connected to the top of the sampling lower shell (101); the solid counterweight ring (103) is fixedly installed inside the sampling lower shell (101); the impurity filter (104) is provided with a circle, and the circle of impurity filter (104) is fixedly installed on the sampling upper shell (102).

3. A pre-processing device for drug residue detection according to claim 2, characterized in that: The connection unit (200) comprises: a movable connection frame (201); the movable connection frame (201) is slidably mounted on the sampling upper shell (102), a row of inclined positioning grooves (2011) is provided at the center of the movable connection frame (201), and an inclined water inlet groove (2012) is provided at the bottom end of the movable connection frame (201).

4. A pre-processing device for drug residue detection according to claim 3, characterized in that: The connection unit (200) further comprises: a limit baffle A (202) and a coil spring A (203); the limit baffle A (202) is fixedly mounted on the outside of the movable connection frame (201); the coil spring A (203) is sleeved on the outside of the movable connection frame (201), and the coil spring A (203) is located between the sampling upper shell (102) and the limit baffle A (202).

5. A pre-processing device for drug residue detection according to claim 3, characterized in that: The positioning unit (300) comprises: a movable positioning rod (301), a limiting baffle plate B (302) and a coil spring B (303); the movable positioning rod (301) is slidably mounted on the sampling upper shell (102), and the inner end of the movable positioning rod (301) contacts the corresponding inclined positioning groove (2011); the limiting baffle plate B (302) is fixedly mounted on the outside of the movable positioning rod (301); the coil spring B (303) is sleeved on the outside of the movable positioning rod (301), and the coil spring B (303) is located between the sampling upper shell (102) and the limiting baffle plate B (302).

6. A pre-processing device for drug residue detection according to claim 5, characterized in that: The positioning unit (300) further comprises: a positioning ball (304) and a coil spring C (305); the positioning ball (304) is slidably mounted on the limit baffle B (302), and the bottom of the positioning ball (304) is inserted into the arc-shaped limit groove (1011); the coil spring C (305) is fixedly mounted on the top of the positioning ball (304), and the top of the coil spring C (305) is fixedly connected to the limit baffle B (302).

7. A pre-processing device for drug residue detection according to claim 4, characterized in that: The water inlet unit (400) comprises: a conical water inlet cover (401) and a movable sealing frame (402); the conical water inlet cover (401) is fixedly mounted on the bottom of the sampling lower shell (101), and a plurality of circles of water inlet holes (4011) are provided on the conical water inlet cover (401); the movable sealing frame (402) is rotatably mounted on the inner wall of the conical water inlet cover (401).

8. A pre-processing device for drug residue detection according to claim 7, characterized in that: The driving unit (500) comprises: a battery (501), a controller (502) and a waterproof motor (503); the battery (501) is fixedly mounted on the top of the sampling upper shell (102); the controller (502) is fixedly mounted on the top of the sampling upper shell (102), and the controller (502) is also electrically connected to the battery (501); the waterproof motor (503) is fixedly mounted on the bottom end of the movable connecting frame (201), and the waterproof motor (503) is also electrically connected to the controller (502).

9. A pre-processing device for drug residue detection according to claim 8, characterized in that: The drive unit (500) further comprises: a rubber connection disk (504), a start button (505) and a pause button (506); the rubber connection disk (504) is fixedly mounted on the output shaft of the waterproof motor (503), and the bottom of the rubber connection disk (504) is in close contact with the movable sealing frame (402); the start button (505) is fixedly mounted on the top of the sampling upper shell (102), and the start button (505) is also electrically connected to the controller (502); the pause button (506) is fixedly mounted on the top of the limit baffle A (202), and the pause button (506) is also electrically connected to the controller (502).

10. A pre-processing device for drug residue detection according to claim 3, characterized in that: The control unit (600) comprises: A movable connecting head (601), a hollow gripping rod (602), an anti-skid rubber sleeve (603) and a connecting steel wire rope (604); the movable connecting head (601) is rotatably mounted on a movable connecting frame (201); the hollow gripping rod (602) is threadedly connected to the movable connecting head (601); the anti-skid rubber sleeve (603) is fixedly mounted on the top of the hollow gripping rod (602); the connecting steel wire rope (604) is arranged inside the hollow gripping rod (602), and the bottom of the connecting steel wire rope (604) is fixedly connected to the movable connecting head (601), and the top of the connecting steel wire rope (604) is fixedly connected to the hollow gripping rod (602).

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