Sewage sampling device

Abstract

The sewage sampling device comprises a bearing seat, a plurality of test bottles and a sampling module, the plurality of test bottles are arranged on the bearing seat at intervals, each test bottle comprises a bottle body and a bottle cap, the bottle cap is rotatably mounted on the bottle body through a rotary pin and used for opening / closing the bottle body, and the bottle cap extends outwards relative to the bottle body and forms a groove plate; the sampling module comprises a manipulator, a wedge edge rod and a suction pipe, the wedge edge rod and the suction pipe are arranged in parallel and are respectively connected to the manipulator, the wedge edge rod vertically extends downwards relative to the suction pipe and forms a pushing part, and the pushing part is matched with the groove plate; when the manipulator simultaneously drives the wedge edge rod and the suction tube to vertically move downwards, the wedge edge rod can push the groove plate through the pushing part so as to drive the bottle cap to open the bottle body; the straw can be inserted into the bottle body in the opened state. Therefore, bending deformation of the suction pipe is effectively avoided, the bottle cap is driven to reset through the rotary pin, automatic closing of the bottle cap after sampling can be achieved, and the lasting sealing performance of a test bottle is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of experimental equipment, and in particular to a wastewater sampling device. Background Technology

[0002] In the field of automated experimental and analytical methods (such as biochemical detection, drug screening, or environmental monitoring), it is often necessary to use robotic arms to drive pipettes to automatically and continuously aspirate wastewater samples from multiple test bottles or other containers to detect parameters such as permanganate index, chemical oxygen demand, ammonia nitrogen, or total nitrogen in the wastewater samples, as required. To prevent cross-contamination or concentration changes caused by the volatilization of wastewater samples in the test bottles and to ensure the accuracy and reliability of experimental results, it is usually necessary to seal the mouth of the test bottles with a cap.

[0003] Currently, a common practice for automated sampling is to pre-cut an "X"-shaped slit on the sealing surface of the cap. This method relies on the elastic deformation capability of the cap material (such as rubber or silicone): when the robotic arm pushes the pipette vertically downward, the tip of the pipette opens the "X"-shaped slit and penetrates the cap into the bottle to complete the sampling; after the pipette is pulled out, the "X"-shaped slit can automatically close due to the elastic recovery force of the material, thus theoretically maintaining a sealed state. However, this type of cap based on elastic deformation has significant shortcomings in practical applications: First, with increased usage frequency and contact with various chemical reagents, the cap material is prone to aging and fatigue, leading to a decrease in elasticity, making it difficult for the "X"-shaped slit to close completely, seriously affecting the long-term sealing reliability of the bottle and posing a risk of sample contamination or deterioration. Second, during the sampling process, the pipette needs to continuously resist the elastic resistance of the cap, which can cause the slender pipette to bend, vibrate, or permanently deform, affecting sampling accuracy and shortening its service life. Summary of the Invention

[0004] In view of this, it is necessary to provide a wastewater sampling device that can solve the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution: A wastewater sampling device, the wastewater sampling device comprising: Support; Multiple test bottles are spaced apart on the support base. Each test bottle includes a bottle body and a bottle cap. The bottle cap is rotatably mounted on the bottle body via a pivot pin for opening / closing the bottle body. The bottle cap extends outward relative to the bottle body and forms a groove. The sampling module includes a robotic arm, a wedge rod, and a suction tube. The wedge rod and the suction tube are arranged parallel to each other and are respectively connected to the robotic arm. The wedge rod extends vertically downward relative to the suction tube and forms a pushing part, which is matched with the groove plate. When the robotic arm simultaneously moves the wedge rod and the straw vertically downwards, the wedge rod can push the groove plate through the pushing part to drive the bottle cap to open the bottle; and the straw can be inserted into the open bottle.

[0006] In one embodiment, the pushing part has a wedge-shaped surface, and the pushing part is capable of pushing the groove plate through the wedge-shaped surface.

[0007] In one embodiment, the wedge rod further includes a main rod body, which is disposed directly above the pushing part and is integrally connected to the pushing part; The main rod has a vertical plane connected to the wedge-shaped surface, and the main rod can abut against the groove plate through the vertical plane.

[0008] In one embodiment, the groove plate has a notch, and the wedge rod can be inserted vertically downward into the notch and abut against the groove wall for pushing the bottle cap.

[0009] In one embodiment, the number of bottle caps is configured to be two, and the two bottle caps can be closed by the action of their respective rotary pins to close the bottle body; The wedge rods are configured in pairs, with each wedge rod corresponding to one of the two bottle caps. The two wedge rods can simultaneously push the corresponding two bottle caps open to open the bottle body.

[0010] In one embodiment, the two bottle caps are symmetrical about the center of the bottle body.

[0011] In one embodiment, the sampling module further includes a stirring rod, which is mounted on the robotic arm and can be inserted into the open bottle under the action of the robotic arm.

[0012] In one embodiment, the stirring rod includes a rod body and stirring blades, the stirring blades being vertically connected to one end of the rod body and located below the straw; The rod is arranged parallel to the straw.

[0013] In one embodiment, the stirring blade is connected to an upwardly extending set of rigid bristles, which can sweep across the nozzle of the straw under the action of the stirring blade.

[0014] In one embodiment, the number of the hard bristle groups is configured to be multiple groups, and the multiple groups of hard bristle groups are coaxially distributed with the rod body as the center line; Multiple sets of the aforementioned hard bristles can sequentially sweep across the suction nozzle under the action of the stirring blades.

[0015] Due to the application of the above solution, this application has the following advantages compared with the prior art: The wastewater sampling device claimed in this application involves a robotic arm that first drives a wedge rod to push the bottle cap, causing it to rotate and open the bottle. The pipette is then inserted into the opened bottle to complete the sampling. This process eliminates the need for the pipette to overcome the elastic resistance of the sealing cap during sampling, effectively preventing bending and deformation of the pipette and extending its service life. Furthermore, the automatic closure of the bottle cap after sampling is achieved through a rotating pin that drives the cap's reset action, ensuring the bottle's long-lasting seal and meeting the reliability and durability requirements of automated sampling. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a partial structural diagram of the wastewater sampling device provided in this application.

[0018] Figure 2 The diagram shows the structure of the test bottle provided in this application, in which two caps are open and the bottle body is opened.

[0019] Figure 3 A cross-sectional view of the test bottle provided in this application.

[0020] Figure 4 This is a partial structural diagram of the sampling module provided in this application.

[0021] Figure 5 This is a partial structural schematic diagram of the sampling module provided in this application from another perspective.

[0022] Reference numerals: 100, wastewater sampling device; 10, test bottle; 11, bottle body; 111, connecting lug; 12, bottle cap; 13, rotating pin; 14, slot plate; 141, notched slot; 15, elastic element; 20, sampling module; 21, robotic arm; 22, wedge rod; 221, pushing part; 2211, wedge-shaped surface; 222, main rod body; 2221, vertical plane; 23, straw; 231, nozzle; 24, stirring rod; 241, rod body; 242, stirring blade; 2421, crossbar; 243, hard bristle assembly; 2431, metal wire. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0025] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0027] like Figures 1 to 5As shown, the wastewater sampling device 100 provided in this application includes a support base (not shown), multiple test bottles 10, and a sampling module 20. The multiple test bottles 10 are spaced apart on the support base. Each test bottle 10 includes a bottle body 11 and a cap 12. The cap 12 is rotatably mounted on the bottle body 11 via a pivot pin 13 for opening / closing the bottle body 11. The cap 12 extends outward relative to the bottle body 11 and forms a groove 14. The sampling module 20 includes a robotic arm 21, a wedge rod 22, and a pipette 23. The wedge rod 22 and the straw 23 are arranged parallel to each other and are respectively connected to the robot arm 21. The wedge rod 22 extends vertically downward relative to the straw 23 and forms a pushing part 221, which is matched with the slot plate 14. When the robot arm 21 drives the wedge rod 22 and the straw 23 to move vertically downward at the same time, the wedge rod 22 can push the slot plate 14 through the pushing part 221 to drive the bottle cap 12 to open the bottle body 11. Furthermore, the straw 23 can be inserted into the open bottle body 11.

[0028] Here, as Figure 3 As shown, the rotary pin 13 adopts a pin structure and integrates an elastic element 15 (such as a coil spring or torsion spring) on ​​its exterior to provide rotational force. One end of the elastic element 15 is connected to the bottle body 11, and the other end is connected to the bottle cap 12. In this way, when the bottle cap 12 loses the pushing action of the wedge rod 22, the elastic element 15 in the rotary pin 13 releases its stored energy, driving the bottle cap 12 to automatically rotate and reset, thereby re-closing the bottle body 11.

[0029] It should be noted that in the sampling module 20 of this application, after the pipette 23 completes the aspiration of the sewage sample in the test bottle 10, the residual sample in the pipette can be removed by reverse blowing, thereby avoiding cross-contamination between different sewage samples in the subsequent sampling process.

[0030] As can be seen from the above, in the wastewater sampling device 100 claimed in this application, before the robotic arm 21 drives the wedge rod 22 to push the bottle cap 12, causing it to rotate on the bottle cap 11 and open the bottle cap 11, the robotic arm 21 first drives the wedge rod 22 to push the bottle cap 12, and then inserts the robotic arm 21 into the opened bottle cap 11 to complete the sampling. This process eliminates the need for the robotic arm 23 to overcome the elastic resistance of the sealing cap during sampling, effectively preventing the robotic arm 23 from bending and deforming and extending its service life. Furthermore, by using the rotary pin 13 to drive the bottle cap 12 to reset, the bottle cap 12 can be automatically closed after sampling, thereby ensuring the long-term sealing of the test bottle 10 and meeting the reliability and durability requirements of automated sampling.

[0031] like Figure 1As shown, in one embodiment, a connecting lug 111 is provided on the outer periphery of the bottle body 11, and the bottle cap 12 can be rotatably connected to the connecting lug 111 via a pivot pin 13. That is, in this embodiment, the bottle body 11 provides a mounting and support platform structure for the bottle cap 12 using the connecting lug 111, thereby achieving a reliable hinged connection of the bottle cap 12 to the bottle body 11. Here, the connecting lug 111 is integrally connected to the bottle body 11.

[0032] like Figure 1 , Figure 2 As shown, in one embodiment, a notch 141 is provided on the groove plate 14, and a wedge rod 22 can be vertically inserted into the notch 141 and abut against the groove wall of the notch 141 to push the bottle cap 12. This allows the wedge rod 22 to push the bottle cap 12 within the notch 141 of the groove plate 14. During this process, the abutment between the groove wall of the notch 141 and the wedge rod 22 counteracts the abutment of the wedge rod 22 on the groove plate 14, thereby ensuring the stability of the bottle cap 12 opening from the bottle body 11. Here, the groove wall abutting against the wedge rod 22 is an angled slope of the notch 141.

[0033] like Figure 1 As shown, in one embodiment, the pushing part 221 has a wedge-shaped surface 2211, and the pushing part 221 can push the groove plate 14 through the wedge-shaped surface 2211. In this process, by utilizing the structural characteristics of the wedge-shaped surface 2211, the pushing part 221 can decompose into a horizontal component force in its vertical downward movement, thereby effectively overcoming the elastic restoring force of the rotary pin 13, driving the bottle cap 12 to rotate around it, and realizing the smooth opening of the bottle cap 12.

[0034] The wedge rod 22 includes a main rod 222, which is positioned directly above and integrally connected to the pushing part 221. The main rod 222 has a vertical plane 2221 connected to the wedge-shaped surface 2211, and the main rod 222 can abut against the groove plate 14 through the vertical plane 2221. Thus, when the wedge rod 22 moves vertically downwards and opens the bottle cap 12, the vertical plane 2221 of the main rod 222 maintains surface contact with the groove plate 14, thereby providing stable limiting support for the bottle cap 12 during subsequent continuous downward movement, keeping it in the open state.

[0035] like Figure 1 , Figure 2 As shown, in one embodiment, two bottle caps 12 are configured, and the two bottle caps 12 can close under the action of their respective rotating pins 13 to close the bottle body 11; correspondingly, two wedge rods 22 are also configured, with each wedge rod 22 corresponding to one of the two bottle caps 12, and the two wedge rods 22 can simultaneously push the corresponding two bottle caps 12 open to open the bottle body 11. Here, the two bottle caps 12 are symmetrical about the center of the bottle body 11.

[0036] It should be noted that, in order to improve the sealing effect of the two bottle caps 12 on the bottle body 11 when they are closed, the two bottle caps 12 can be designed to abut against each other through a matching concave-convex structure. This mating method can form an effective sealing contact when closed, thereby ensuring the sealing performance of the bottle body 11 in the closed state.

[0037] like Figure 1 , Figure 4 As shown, in one embodiment, the sampling module 20 further includes a stirring rod 24, which is mounted on a robotic arm 21. The stirring rod 24 can be inserted into the open bottle 11 under the drive of the robotic arm 21, so that when the sewage sampling device 100 is working, the stirring rod 24 can be used to stir the liquid in the bottle 11 first, and then the pipette 23 can be used to draw up the liquid stirred by the stirring rod 24, so that the liquid is mixed evenly to meet the sampling requirements.

[0038] The stirring rod 24 includes a rod body 241 and a stirring blade 242. The rod body 241 is arranged parallel to the suction tube 23. The stirring blade 242 is vertically connected to one end of the rod body 241 and is located below the suction tube 23. Here, the stirring blade 242 is configured as a crossbar 2421, which is perpendicular to the rod body 241. Specifically, the crossbar 2421 can be connected to the rod body 241 as a single unit. Of course, in other embodiments, the crossbar 2421 can also be arranged on one side of the rod body 241 near its end, and the crossbar 2421 can also be inclined relative to the rod body 241, which will not be elaborated here.

[0039] like Figure 1 , Figure 4 As shown, in one embodiment, the stirring blade 242 is disposed at one end of the rod 241 and arranged symmetrically with respect to the rod 241.

[0040] like Figure 1 , Figure 4 As shown, in one embodiment, a rigid bristle assembly 243 extending upward is connected to the stirring blade 242. The rigid bristle assembly 243 can sweep across the suction nozzle 231 of the suction tube 23 under the action of the stirring blade 242. When the wastewater sampling device 100 is working, the rigid bristle assembly 243 on the stirring blade 242 can periodically and actively brush the suction nozzle 231. This can effectively prevent particulate impurities from accumulating at the suction nozzle 231 and avoid the problem of the suction nozzle 231 being blocked due to the accumulation of particulate impurities. This can ensure the continuity and stability of the suction process of the suction tube 23 and meet the requirements of automated sampling for reliability and efficiency.

[0041] Here, the opening end of the suction nozzle 231 is serrated. By utilizing the serrated structural feature, the suction capacity of the suction nozzle 231 when sucking up liquid media can be further optimized, and the anti-clogging ability of the suction nozzle 231 can be enhanced.

[0042] like Figure 4 , Figure 5 As shown, in one embodiment, the number of hard bristle groups 243 is configured as multiple groups, which are coaxially distributed around the rod body as the center line. Driven by the stirring blades 242, the multiple hard bristle groups 243 can sequentially sweep across the suction nozzle 231. In other words, the wastewater sampling device 100 of this embodiment actively brushes different parts of the suction nozzle 231 sequentially and periodically using multiple hard bristle groups 243. This allows for area-based and time-based brushing of the suction nozzle 231, ensuring that when any part of the suction nozzle 231 is brushed, there are always other parts not touched by the hard bristle groups 243 available for normal suction. This maintains the suction efficiency of the suction nozzle 231 without interference while preventing blockage, achieving coordinated brushing and sampling.

[0043] Here, the number of stiff bristle groups 243 is configured as two groups, which are arranged on two symmetrical sides of the rod body 241; and each group of stiff bristle groups 243 can perform brushing operations on half of the suction nozzle 231 at one time. Of course, in other embodiments, the number of stiff bristle groups 243 can also be configured as three, four, or more groups, which will not be elaborated here.

[0044] The rigid bristle assembly 243 includes multiple metal wires 2431, which are arranged at intervals along the length of the crossbar 2421. In summary, when the wastewater sampling device 100 of this application is in operation, the robotic arm 21 first aligns with the test bottle 10, and then simultaneously drives the wedge rod 22, the pipette 23, and the stirring rod 24 to move vertically downwards. During this process, the wedge rod 22 first pushes against the groove plate 14 on the bottle cap 12, causing the bottle cap 12 to rotate around the pivot pin 13 and open the bottle body 11; subsequently, the pipette 23 and the stirring rod 24 move downwards and are simultaneously inserted into the opened bottle body 11 to perform sampling and stirring operations respectively. After sampling is completed, the robotic arm 21 drives each component to return to its vertical position; the wedge rod 22 finally disengages from the groove plate 14, and the bottle cap 12 automatically rotates under the elastic reset action of the pivot pin 13, re-closing the bottle body 11 and restoring the sealed state.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A wastewater sampling device, characterized in that, The wastewater sampling device (100) includes: Support; Multiple test bottles (10) are spaced apart on the support base. Each test bottle (10) includes a bottle body (11) and a bottle cap (12). The bottle cap (12) is rotatably mounted on the bottle body (11) via a pivot pin (13) for opening / closing the bottle body (11). The bottle cap (12) extends outward relative to the bottle body (11) and forms a groove plate (14). The sampling module (20) includes a robotic arm (21), a wedge rod (22), and a suction tube (23). The wedge rod (22) and the suction tube (23) are arranged parallel to each other and are respectively connected to the robotic arm (21). The wedge rod (22) extends vertically downward relative to the suction tube (23) and forms a pushing part (221). The pushing part (221) is matched with the slot plate (14). When the robotic arm (21) simultaneously drives the wedge rod (22) and the straw (23) to move vertically downward, the wedge rod (22) can push the groove plate (14) through the pushing part (221) to drive the bottle cap (12) to open the bottle body (11); and the straw (23) can be inserted into the open bottle body (11).

2. The wastewater sampling device according to claim 1, characterized in that, The pushing part (221) has a wedge-shaped surface (2211), and the pushing part (221) can push the groove plate (14) through the wedge-shaped surface (2211).

3. The wastewater sampling device according to claim 2, characterized in that, The wedge rod (22) also includes a main rod body (222), which is located directly above the pushing part (221) and is connected to the pushing part (221) as a whole; The main rod (222) has a vertical plane (2221) connected to the wedge-shaped surface (2211), and the main rod (222) can abut against the groove plate (14) through the vertical plane (2221).

4. The wastewater sampling device according to claim 2, characterized in that, The groove plate (14) has a notch (141), and the wedge rod (22) can be inserted vertically downward into the notch (141) and abut against the groove wall of the notch (141) to push the bottle cap (12).

5. The wastewater sampling device according to any one of claims 1 to 4, characterized in that, The number of bottle caps (12) is configured to be two, and the two bottle caps (12) can be closed by the drive of their respective rotary pins (13) to close the bottle body (11). The number of the wedge rods (22) is also configured to be two, and the two wedge rods (22) correspond one-to-one with the two bottle caps (12). The two wedge rods (22) can simultaneously push the corresponding two bottle caps (12) open to open the bottle body (11).

6. The wastewater sampling device according to claim 5, characterized in that, The two bottle caps (12) are centrally symmetrical with respect to the bottle body (11).

7. The wastewater sampling device according to claim 1, characterized in that, The sampling module (20) also includes a stirring rod (24), which is mounted on the robotic arm (21) and can be inserted into the open bottle (11) under the drive of the robotic arm (21).

8. The wastewater sampling device according to claim 7, characterized in that, The stirring rod (24) includes a rod body (241) and a stirring blade (242). The stirring blade (242) is vertically connected to one end of the rod body (241) and is located below the straw (23). The rod (241) is arranged parallel to the straw (23).

9. The wastewater sampling device according to claim 8, characterized in that, The stirring blade (242) is connected to an upwardly extending hard bristle assembly (243), which can sweep across the nozzle (231) of the straw (23) under the action of the stirring blade (242).

10. The wastewater sampling device according to claim 9, characterized in that, The number of the hard bristle groups (243) is configured as multiple groups, and the multiple groups of hard bristle groups (243) are coaxially distributed with the rod (241) as the center line; Multiple sets of the hard bristle groups (243) can sequentially sweep across the suction nozzle (231) under the action of the stirring blades (242).

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