A modular mercury sample rapid pretreatment flow path device

Abstract

The application discloses a modular mercury sample rapid pretreatment flow path device, which comprises an intermediate rotating module, three adjustable mixing cavity modules with adjustable space sizes arranged on the intermediate rotating module, three quantitative feeding modules for quantitatively feeding respectively fixed outside the intermediate rotating module, three quantitative feeding modules capable of sequentially communicating with the three adjustable mixing cavity modules, and a self-expanding linkage module arranged between the intermediate rotating module and the quantitative feeding module. Through linkage design of the intermediate rotating module, the adjustable mixing cavity module and the quantitative feeding module, quantitative and accurate injection and step-by-step mixing of sample liquid, oxidizing agent and reducing agent are realized, meanwhile, automation linkage of each link is realized by using the self-expanding linkage module and the space step-by-step linkage adjusting module, reaction time is effectively shortened, pretreatment efficiency is improved, the modular structure is convenient for cleaning and maintenance, and mercury memory effect is reduced.

Description

Technical Field

[0001] This invention relates to the field of environmental monitoring and sample pretreatment technology, and in particular to a modular rapid mercury sample pretreatment flow path device. Background Technology

[0002] As a highly toxic heavy metal, the accurate detection of mercury in environmental samples is an important aspect of environmental monitoring. Sample pretreatment is the core step in mercury detection, which requires the digestion of different forms of mercury, organic mercury, and bound mercury in the sample into divalent mercury ions, and then reducing them into detectable zero-valent mercury vapor.

[0003] Existing mercury sample pretreatment devices have several technical defects: First, the addition of sample solution, oxidant, and reducing agent mostly relies on peristaltic pumps or solenoid valves for crude control, resulting in insufficient quantitative accuracy, easy imbalance of reagent ratios, and affecting the thoroughness of digestion and reduction reactions; Second, the reaction chamber volume is fixed, the sample and reagents are not mixed sufficiently, the dead volume is large, resulting in long reaction time and low pretreatment efficiency; Third, the injection, reagent addition, mixing, and discharge processes lack linkage design, have low automation, require a lot of manual intervention, and cannot achieve continuous processing of batches of samples.

[0004] To address the aforementioned issues, there is an urgent need to design a modular, quantitatively accurate, automated, and highly efficient mercury sample pretreatment flow path device. Through structural optimization, this device can achieve efficient and automated sample pretreatment, thereby improving the accuracy and efficiency of mercury detection.

[0005] Therefore, the existing technologies for environmental monitoring and sample pretreatment need further improvement. Summary of the Invention

[0006] The purpose of this invention is to provide a modular rapid mercury sample pretreatment flow path device. Through the linkage design of the intermediate rotating module, the regulating mixing chamber module and the quantitative feeding module, the device achieves precise quantitative addition and stepwise mixing of sample liquid, oxidant and reducing agent. At the same time, the device utilizes the self-expanding linkage module and the spatial stepwise linkage adjustment module to achieve automated linkage of each step, effectively shortening the reaction time, improving the pretreatment efficiency, and the modular structure facilitates cleaning and maintenance, reducing the mercury memory effect.

[0007] To achieve the above objectives, the present invention adopts the following solution:

[0008] A modular rapid mercury sample pretreatment flow path device includes an intermediate rotating module with three adjustable mixing chamber modules of adjustable size. Three quantitative feeding modules for quantitative feeding are fixed externally to the intermediate rotating module, and these three quantitative feeding modules are sequentially connected to the three adjustable mixing chamber modules. The three quantitative feeding modules are arranged clockwise along the intermediate rotating module, with the last quantitative feeding module subsequently connected to a discharge module. A self-expanding linkage module is provided between the intermediate rotating module and the quantitative feeding modules. A spatial stepped linkage adjustment module is provided between the intermediate rotating module and the adjustable mixing chamber modules.

[0009] Furthermore, the intermediate rotating module includes a circular valve body, a circular valve cavity is provided inside the circular valve body, a rotor is rotatably disposed in the circular valve cavity, a shaft hole communicating with the circular valve cavity is provided on the upper end face of the circular valve body, and a rotating shaft body capable of being connected to an external motor is provided on the upper end of the rotor, the rotating shaft body being rotatably installed in the shaft hole.

[0010] Furthermore, the three regulating mixing chamber modules are evenly distributed around the central circumference of the intermediate rotating module;

[0011] The regulating mixing chamber module includes a radial mixing groove disposed on the rotor. An adjusting push plate for adjusting the size of the radial mixing groove is movably disposed in the radial mixing groove. A conductive opening is provided on one side of the radial mixing groove and on the outer wall of the circular valve body.

[0012] Furthermore, the three quantitative feed modules are evenly distributed and fixedly disposed on the outer wall of the circular valve body around the center of the circular valve body;

[0013] The quantitative feed module includes a radial quantitative channel, which is connected to a corresponding conductive opening. A feed pusher is movably disposed within the radial quantitative channel. A replenishment valve chamber is disposed above the radial quantitative channel. A feed pipe is connected to the replenishment valve chamber. A baffle plate for disconnecting or connecting the radial quantitative channel and the replenishment valve chamber is disposed on the upper surface of the feed pusher.

[0014] Furthermore, the discharge module includes an output pipe disposed on the outer wall of the circular valve body, and a discharge channel is provided between the outer wall of the circular valve body and the inner wall of the circular valve cavity, with the output pipe and the discharge channel connected together.

[0015] Furthermore, the self-expanding linkage module includes an extension connecting rod assembly disposed on the feed push plate, a circular opening is provided below the circular valve body, the extension connecting rod assembly extends to the bottom of the rotor, a trilobal control guide groove is provided on the lower surface of the rotor, a lower guide wheel is provided at the inner end of the extension connecting rod assembly, and the lower guide wheel is movably installed in the trilobal control guide groove.

[0016] Furthermore, the trilobal control guide groove includes three outer arc-shaped guide grooves, which are evenly distributed around the center of the rotor. An inner arc-shaped guide groove is provided between two adjacent outer arc-shaped guide grooves, and a transition oblique guide groove is provided between adjacent outer arc-shaped guide grooves and inner arc-shaped guide grooves.

[0017] Furthermore, the spatial stepped linkage adjustment module includes a stepped closed-loop guide groove disposed on the upper surface of the supply valve chamber, and an upper guide wheel on the upper surface of the feed push plate, the upper guide wheel being movably installed in the stepped closed-loop guide groove.

[0018] Furthermore, the stepped closed-loop guide groove includes a first internally inclined arc groove, a second internally inclined arc groove, a third internally inclined arc groove, and a push-out arc groove. The first internally inclined arc groove, the second internally inclined arc groove, the third internally inclined arc groove, and the push-out arc groove are arranged clockwise around the upper end face of the supply valve chamber. The first internally inclined arc groove, the second internally inclined arc groove, and the third internally inclined arc groove are respectively aligned with the three clockwise positions of the quantitative feed modules. The push-out arc groove connects the third internally inclined arc groove and the first internally inclined arc groove. The push-out arc groove is aligned with the discharge channel. The first internally inclined arc groove, the second internally inclined arc groove, the third internally inclined arc groove, and the push-out arc groove are connected sequentially through connecting guide grooves.

[0019] Furthermore, the radii of the first segment of the inward-sloping arc groove, the three segments of the inward-sloping arc groove, and the ejection arc groove gradually decrease and gradually approach the center position of the supply valve chamber. The ejection arc groove extends outward from the radius position of the three segments of the inward-sloping arc groove to the radius position of the first segment of the inward-sloping arc groove.

[0020] In summary, the advantages of this invention over the prior art are:

[0021] This invention addresses the shortcomings of existing environmental monitoring and sample pretreatment technologies. Through its structural design, it offers the following advantages: a rationally modular layout; a quantitative feeding module that, through the cooperation of a radial quantitative channel and baffles, achieves precise quantitative dispensing of sample solution, oxidant, and reducing agent; the dispensing volume can be flexibly adjusted by changing the reference position of the feed pusher or by changing the model of the quantitative feeding module to adapt to the pretreatment needs of mercury samples of different concentrations; a self-expanding linkage module and a spatial stepped linkage adjustment module achieve fully automated linkage operation of the device; the rotor rotation drives the synchronous movement of each pusher, eliminating the need for additional drive components, simplifying the structure while achieving seamless connection of sample injection, reagent dispensing, mixing, and discharge, significantly improving the degree of automation; the mixing chamber module adopts a stepped expansion design, sequentially mixing the sample solution, oxidant, and reducing agent as the rotor rotates, allowing the media to fully contact and react in a gradient-increasing space, reducing dead volume, improving mixing and reaction efficiency, and significantly shortening pretreatment time; during the discharge stage, the mixing chamber space is instantly reduced to its minimum value, using the change in chamber volume to achieve rapid dispensing of the media without residue; and the discharge module can be directly connected to the detection instrument, achieving integrated operation of pretreatment and detection. Attached Figure Description

[0022] Figure 1 This is the front view of the present invention;

[0023] Figure 2 This is a bottom view of the present invention;

[0024] Figure 3 For the present invention Figure 1 Sectional view along line AA;

[0025] Figure 4 For the present invention Figure 3 Sectional view along line BB;

[0026] Figure 5 For the present invention Figure 3 Sectional view along line CC;

[0027] Figure 6 For the present invention Figure 5 A schematic diagram of the second state;

[0028] Figure 7 For the present invention Figure 5 A schematic diagram of the third state;

[0029] Figure 8 This is one of the exploded views of the present invention;

[0030] Figure 9 This is the second exploded view of the present invention;

[0031] Figure 10 This is a schematic diagram of the stepped closed-loop guide groove of the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-10 This invention provides a modular rapid mercury sample pretreatment flow path device, including an intermediate rotating module 1. Three adjustable mixing chamber modules 2 with adjustable sizes are arranged on the intermediate rotating module 1. Three quantitative feeding modules 3, each for quantitative feeding, are fixed outside the intermediate rotating module 1. The three quantitative feeding modules 3 are sequentially connected to the three adjustable mixing chamber modules 2. The three quantitative feeding modules 3 are used to quantitatively feed corresponding media, including sample liquid, oxidant, and reducing agent. The three quantitative feeding modules 3 are arranged clockwise along the intermediate rotating module 1, with the last quantitative feeding module 3 subsequently connected to a discharge module 4. A self-expanding linkage module 5 is provided between the intermediate rotating module 1 and the quantitative feeding modules 3. When one of the quantitative feeding modules 3 rotates and approaches the quantitative feeding module 3, a self-expanding linkage module 5 is provided. When feeding module 3 is in operation, the self-expanding linkage module 5 drives the quantitative feeding module 3 to advance and feed the medium. When moving away from the quantitative feeding module 3, the quantitative feeding module 3 automatically retracts and quantitatively fills the medium. A spatial step-linkage adjustment module 6 is provided between the intermediate rotation module 1 and the adjustment mixing chamber module 2. The spatial step-linkage adjustment module 6 can gradually increase the space of the adjustment mixing chamber module 2 during clockwise rotation. The node for space adjustment is when it is about to align with the position of the quantitative feeding module 3. After aligning with the positions of the three quantitative feeding modules 3 in sequence, the space of the adjustment mixing chamber module 2 is at its maximum value. Then, after rotating and aligning with the discharge module 4, the space of the adjustment mixing chamber module 2 will be instantly reduced to its minimum value. The medium mixed inside is pushed out to the discharge module 4 through the adjustment mixing chamber module 2.

[0034] Start the external stepper motor to drive the rotor 103 to rotate at a constant speed in the circular valve chamber 102, and adjust the mixing chamber module 2 to rotate synchronously with the rotor 103;

[0035] When one of the regulating mixing chamber modules 2 rotates to align with the first quantitative feeding module 3 (sample liquid), the lower guide wheel 504 of the self-expanding linkage module 5 enters the inner arc-shaped guide groove 5032 from the outer arc-shaped guide groove 5031 through the inclined guide groove 5033, driving the feed push plate 302 to move inward, blocking the baffle 305 to block the supply valve chamber 303, and simultaneously pushing the quantitative sample liquid in the radial quantitative channel 301 into the radial mixing tank 201; at this time, the upper guide wheel 602 of the spatial step-linkage regulating module 6 slides along a section of the inner inclined arc-shaped groove 6011, driving the regulating push plate 202 to move slightly inward, and the space of the radial mixing tank 201 increases slightly to accommodate the sample liquid;

[0036] Rotor 103 continues to rotate, and the mixing chamber module 2 is rotated sequentially until it is aligned with the second quantitative feeding module 3 (oxidant) and the third quantitative feeding module 3 (reducing agent). The above quantitative pushing process is repeated, and the upper guide wheel 602 slides along the two-section inner inclined arc groove 6012 and the three-section inner inclined arc groove 6013 respectively, driving the adjusting push plate 202 to move inward continuously. The spatial steps of the radial mixing tank 201 increase, and the sample liquid is fully mixed with the oxidant and the reducing agent in sequence to complete the digestion and reduction reaction and generate zero-valent mercury vapor.

[0037] Rotor 103 continues to rotate, and the regulating mixing chamber module 2, which completes the reaction, rotates to align with the discharge module 4. The upper guide wheel 602 enters the ejection arc groove 6014, driving the regulating push plate 202 to move outward instantly. The space of the radial mixing groove 201 instantly drops to the minimum value, quickly pushing the internal mixing medium to the discharge channel 402. It then passes through the output pipe 401 to the subsequent process to react with zero-valent mercury vapor, and is then exported to the detection instrument for detection.

[0038] Rotor 103 rotates continuously, and lower guide wheel 504 enters outer arc-shaped guide groove 5031 from inner arc-shaped guide groove 5032 through inclined guide groove 5033, driving feed push plate 302 to move outward. Blocking baffle 305 moves outward accordingly, and radial quantitative channel 301 connects with replenishment valve chamber 303. Medium is refilled into radial quantitative channel 301 to prepare for the next quantitative push. At the same time, the mixing chamber module 2 is adjusted to rotate to the position of the next quantitative feed module 3 to start a new round of sample pretreatment process, realizing continuous automated processing of batch samples.

[0039] The intermediate rotating module 1 of the present invention includes a circular valve body 101, a circular valve cavity 102 is provided inside the circular valve body 101, a rotor 103 is rotatably disposed inside the circular valve cavity 102, a shaft hole 104 communicating with the circular valve cavity 102 is provided on the upper end surface of the circular valve body 101, and a rotating shaft 105 that can be connected to an external motor is provided on the upper end of the rotor 103, and the rotating shaft 105 is rotatably installed in the shaft hole 104.

[0040] The three regulating mixing chamber modules 2 of the present invention are evenly distributed around the central circumference of the intermediate rotating module 1;

[0041] The regulating mixing chamber module 2 includes a radial mixing groove 201 disposed on the rotor 103. An adjusting push plate 202 for adjusting the size of the radial mixing groove 201 is movably disposed in the radial mixing groove 201. A conduction opening 203 is provided on one side of the radial mixing groove 201 and on the outer wall of the circular valve body 101.

[0042] The three quantitative feeding modules 3 of the present invention are evenly distributed and fixedly disposed on the outer wall of the circular valve body 101 around the center of the circular valve body 101.

[0043] The quantitative feeding module 3 includes a radial quantitative channel 301, which is connected to a corresponding conductive opening 203. A feed pusher 302 is movably disposed in the radial quantitative channel 301. A replenishment valve chamber 303 is disposed above the radial quantitative channel 301. A feed pipe 304 is connected to the replenishment valve chamber 303. A baffle 305 for disconnecting or connecting the radial quantitative channel 301 and the replenishment valve chamber 303 is disposed on the upper surface of the feed pusher 302.

[0044] When the baffle 305 moves outward, the radial quantitative channel 301 and the supply valve chamber 303 are connected. At this time, the sample liquid, oxidant or reducing agent is filled from the supply valve chamber 303 into the radial quantitative channel 301. The amount filled into the radial quantitative channel 301 is determined according to the space size of the radial quantitative channel 301. The maximum capacity of the radial quantitative channel 301 can be changed by adjusting the reference position of the feed pusher 302, or the quantitative control can be achieved by changing the model and size of the quantitative feed module 3. When the feed pusher 302 moves inward, it will push the medium into the corresponding radial mixing tank 201.

[0045] The discharge module 4 of the present invention includes an output pipe 401 disposed on the outer wall of the circular valve body 101, and a discharge channel 402 is disposed between the outer wall of the circular valve body 101 and the inner wall of the circular valve cavity 102. The output pipe 401 and the discharge channel 402 are connected.

[0046] The self-extending linkage module 5 of the present invention includes an extension connecting rod assembly 501 disposed on the feed push plate 302. A circular opening 502 is provided below the circular valve body 101. An inner annular boss for supporting the rotation of the rotor 103 is provided on the inner wall of the circular valve body 101. The extension connecting rod assembly 501 extends to the bottom of the rotor 103. A trilobal control guide groove 503 is provided on the lower surface of the rotor 103. A lower guide wheel 504 is provided at the inner end of the extension connecting rod assembly 501. The lower guide wheel 504 is movably installed in the trilobal control guide groove 503.

[0047] The trilobal control guide groove 503 of the present invention includes three outer arc-shaped guide grooves 5031, which are evenly distributed around the center of the rotor 103. An inner arc-shaped guide groove 5032 is provided between two adjacent outer arc-shaped guide grooves 5031, and a transition inclined guide groove 5033 is provided between adjacent outer arc-shaped guide grooves 5031 and inner arc-shaped guide grooves 5032. The rotor 103 rotates continuously, and during the rotation, it drives the trilobal control guide groove 503 to rotate continuously. When the lower guide wheel 504 enters the outer arc-shaped guide groove, the control guide groove 503 rotates continuously. During the process of positioning the inner arc-shaped guide groove 5031, the feed pusher 302 will gradually move outward to achieve quantitative filling of the medium into the radial quantitative channel 301; when the lower guide wheel 504 enters the inner arc-shaped guide groove 5032, the feed pusher 302 will gradually push inward to quantitatively push the medium filled into the radial quantitative channel 301 into a corresponding regulating mixing chamber module 2. During the process of the feed pusher 302 gradually pushing inward, the corresponding regulating mixing chamber module 2 will also gradually increase its space capacity.

[0048] The spatial step-by-step linkage adjustment module 6 of the present invention includes a step-by-step closed-loop guide groove 601 disposed on the upper surface of the supply valve chamber 303, and an upper guide wheel 602 on the upper surface of the feed push plate 302, the upper guide wheel 602 being movably installed in the step-by-step closed-loop guide groove 601.

[0049] The stepped closed-loop guide groove 601 of the present invention includes a first internally inclined arc-shaped groove 6011, a second internally inclined arc-shaped groove 6012, a third internally inclined arc-shaped groove 6013, and a push-out arc-shaped groove 6014. The first internally inclined arc-shaped groove 6011, the second internally inclined arc-shaped groove 6012, the third internally inclined arc-shaped groove 6013, and the push-out arc-shaped groove 6014 are arranged clockwise around the upper end face of the supply valve chamber 303. The first internally inclined arc-shaped groove 6011, the second internally inclined arc-shaped groove 6012, the third internally inclined arc-shaped groove 6013, and the push-out arc-shaped groove 6014 are arranged clockwise around the upper end face of the supply valve chamber 303. The grooves 6013 are respectively aligned with the three clockwise positions of the quantitative feed modules 3. The ejection arc groove 6014 is connected between the three-section inner inclined arc grooves 6013 and the one-section inner inclined arc groove 6011. The ejection arc groove 6014 is aligned with the discharge channel 402. The one-section inner inclined arc groove 6011, the two-section inner inclined arc groove 6012, the three-section inner inclined arc groove 6013 and the ejection arc groove 6014 are connected in sequence through the connecting guide groove 6015.

[0050] In this invention, the radii of the first segment of the inwardly inclined arc groove 6011, the three segments of the inwardly inclined arc groove 6013, and the ejection arc groove 6014 gradually decrease and gradually approach the center position of the supply valve chamber 303. The ejection arc groove 6014 extends outward from the radius position of the three segments of the inwardly inclined arc groove 6013 to the radius position of the first segment of the inwardly inclined arc groove 6011.

[0051] H represents the quantitative feeding direction of the sample solution;

[0052] I represents the quantitative feed direction of the oxidant;

[0053] J represents the quantitative feeding direction of the reducing agent;

[0054] K represents the direction in which the mixture is ejected.

[0055] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular mercury sample rapid pretreatment flow path device, characterized in that: The system includes an intermediate rotating module (1), on which three adjustable mixing chamber modules (2) with adjustable space sizes are arranged. Three quantitative feeding modules (3) for quantitative feeding are fixed outside the intermediate rotating module (1). The three quantitative feeding modules (3) can be connected to the three adjustable mixing chamber modules (2) in sequence. The three quantitative feeding modules (3) are arranged clockwise along the intermediate rotating module (1), and the last quantitative feeding module (3) is followed by a discharge module (4). A self-expanding linkage module (5) is provided between the intermediate rotating module (1) and the quantitative feeding modules (3). A spatial ladder linkage adjustment module (6) is provided between the intermediate rotating module (1) and the adjustable mixing chamber modules (2).

2. The modular mercury sample rapid pretreatment flow path device according to claim 1, characterized in that: The intermediate rotating module (1) includes a circular valve body (101), a circular valve cavity (102) is provided inside the circular valve body (101), a rotor (103) is rotatably arranged inside the circular valve cavity (102), a shaft hole (104) communicating with the circular valve cavity (102) is provided on the upper end face of the circular valve body (101), and a rotating shaft (105) that can be connected to an external motor is provided on the upper end of the rotor (103), and the rotating shaft (105) is rotatably installed in the shaft hole (104).

3. The modular mercury sample rapid pretreatment flow path device according to claim 2, characterized in that: The three regulating mixing chamber modules (2) are evenly distributed around the central circumference of the intermediate rotating module (1); The regulating mixing chamber module (2) includes a radial mixing groove (201) disposed on the rotor (103). An adjusting push plate (202) for adjusting the size of the radial mixing groove (201) is movably disposed in the radial mixing groove (201). A conducting opening (203) is provided on one side of the radial mixing groove (201) and on the outer wall of the circular valve body (101).

4. The modular mercury sample rapid pretreatment flow path device according to claim 3, characterized in that: The three quantitative feeding modules (3) are evenly distributed and fixed on the outer wall of the circular valve body (101) around the center of the circular valve body (101); The quantitative feed module (3) includes a radial quantitative channel (301), which is connected to a corresponding through opening (203). A feed pusher (302) is movably disposed in the radial quantitative channel (301). A replenishment valve chamber (303) is disposed above the radial quantitative channel (301). A feed pipe (304) is connected to the replenishment valve chamber (303). A baffle (305) for disconnecting or connecting the radial quantitative channel (301) and the replenishment valve chamber (303) is disposed on the upper surface of the feed pusher (302).

5. The modular mercury sample rapid pretreatment flow path device according to claim 4, characterized in that: The discharge module (4) includes an output pipe (401) disposed on the outer wall of the circular valve body (101), and a discharge channel (402) is provided between the outer wall of the circular valve body (101) and the inner wall of the circular valve cavity (102). The output pipe (401) and the discharge channel (402) are connected.

6. The modular mercury sample rapid pretreatment flow path device according to claim 5, characterized in that: The self-stretching linkage module (5) includes an extension connecting rod assembly (501) disposed on the feed push plate (302). A circular opening (502) is provided below the circular valve body (101). The extension connecting rod assembly (501) extends to the bottom of the rotor (103). A trilobal control guide groove (503) is provided on the lower surface of the rotor (103). A lower guide wheel (504) is provided at the inner end of the extension connecting rod assembly (501). The lower guide wheel (504) is movably installed in the trilobal control guide groove (503).

7. The modular mercury sample rapid pretreatment flow path device according to claim 6, characterized in that: The trilobal control guide groove (503) includes three outer arc-shaped guide grooves (5031), which are evenly distributed around the center of the rotor (103). An inner arc-shaped guide groove (5032) is provided between two adjacent outer arc-shaped guide grooves (5031), and a transition oblique guide groove (5033) is provided between adjacent outer arc-shaped guide grooves (5031) and inner arc-shaped guide grooves (5032).

8. The modular mercury sample rapid pretreatment flow path device according to claim 7, characterized in that: The spatial stepped linkage adjustment module (6) includes a stepped closed-loop guide groove (601) disposed on the upper surface of the supply valve chamber (303) and an upper guide wheel (602) on the upper surface of the feed push plate (302), the upper guide wheel (602) being movably installed in the stepped closed-loop guide groove (601).

9. A modular mercury sample rapid pretreatment flow path device according to claim 8, characterized in that: The stepped closed-loop guide groove (601) includes a first internally inclined arc groove (6011), a second internally inclined arc groove (6012), a third internally inclined arc groove (6013), and a push-out arc groove (6014). The first internally inclined arc groove (6011), the second internally inclined arc groove (6012), the third internally inclined arc groove (6013), and the push-out arc groove (6014) are arranged clockwise around the upper end face of the supply valve chamber (303). The first internally inclined arc groove (6011), the second internally inclined arc groove (6012), the third internally inclined arc groove (6013), and the push-out arc groove (6014) are arranged clockwise around the upper end face of the supply valve chamber (303). 6013) Align the three quantitative feed modules (3) clockwise respectively. The ejection arc groove (6014) is connected between the three-section inner inclined arc groove (6013) and the one-section inner inclined arc groove (6011). The ejection arc groove (6014) and the discharge channel (402) are aligned. The one-section inner inclined arc groove (6011), the two-section inner inclined arc groove (6012), the three-section inner inclined arc groove (6013) and the ejection arc groove (6014) are connected in sequence through the connecting guide groove (6015).

10. A modular mercury sample rapid pretreatment flow path device according to claim 9, characterized in that: The radii of the first segment of the inward-sloping arc groove (6011), the three segments of the inward-sloping arc groove (6013), and the ejection arc groove (6014) gradually decrease and gradually approach the center position of the supply valve chamber (303). The ejection arc groove (6014) extends outward from the radius position of the three segments of the inward-sloping arc groove (6013) to the radius position of the first segment of the inward-sloping arc groove (6011).

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