A cleaning mixing mechanism, a heavy metal content detection device and a detection method

Abstract

The present invention discloses a cleaning and mixing mechanism, a heavy metal content detection device and a detection method, and belongs to the technical field of marine food detection. A heavy metal content detection device includes a detection instrument, which is provided with a display screen and a detection slot, and a closed cover is rotatably connected to the detection slot, and also includes a cleaning and mixing mechanism, which includes a support frame fixedly connected to the detection instrument; a rotating frame rotatably connected to the support frame; a mixing barrel rotatably connected to the rotating frame; a weight block is provided at the bottom of the mixing barrel, and a feeding port is provided on the side wall of the mixing barrel; a driving motor; a guide plate; a plurality of guide plates are provided; an extrusion seat; the present invention is convenient for mixing marine food and oxidizing strong acid by providing a mixing barrel that can be horizontal or vertical, thereby improving the mixing effect, and at the same time, in conjunction with the sliding extrusion seat, the gas in the mixing barrel can be squeezed and discharged to prevent the retention of residues, thereby improving the accuracy of the next detection result.

Description

Technical Field

[0001] The present invention relates to the technical field of marine food detection, and in particular to a cleaning and mixing mechanism, a heavy metal content detection device and a detection method. Background Art

[0002] Because marine organisms have unique nutritional value and contain a variety of bioactive substances, they are increasingly becoming an important source of human health food and marine medicines;

[0003] As people's requirements for food safety become higher and higher, the demand for food testing is becoming more and more urgent. Detecting heavy metals in food is an important topic. Food contains more than one heavy metal that is harmful to the human body. Therefore, in practice, multiple heavy metals are usually tested to improve efficiency.

[0004] When testing food, food heavy metal detectors are often used. The detection method of food heavy metal detectors is widely used. The wet digestion method refers to adding oxidizing strong acid to an appropriate amount of food sample, mixing and stirring, thereby destroying organic matter and releasing the inorganic components to be tested to form non-volatile inorganic compounds for analysis and determination;

[0005] However, in the existing technology, residues are easily left in the mixing container during mixing, which affects the result of the next mixing test. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that residues are easily left in the existing mixing container, which affects the result of the next mixing test, and to propose a cleaning mixing mechanism, a heavy metal content detection device and a detection method.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A cleaning and mixing mechanism comprises a support frame; a rotating frame rotatably connected to the support frame; a mixing barrel rotatably connected to the rotating frame; wherein a weight block is provided at the bottom of the mixing barrel, and a feeding port is provided on the side wall of the mixing barrel; a driving motor fixedly connected to the rotating frame, and the mixing barrel is fixedly connected to the output end of the driving motor; a guide plate fixedly connected to the mixing barrel; wherein the guide plate is provided in multiple groups; and an extrusion seat slidably connected to the mixing barrel, for extruding residues remaining on the inner wall of the mixing barrel.

[0009] To facilitate the rotation of the mixing drum, preferably, the support frame is fixedly connected with a rotating disk, the rotating frame is fixedly connected with a rotating shaft, the rotating shaft is rotatably connected to the rotating disk, the rotating frame is fixedly connected with a rotating protrusion, the mixing drum is provided with a rotating groove, and the rotating protrusion is rotatably connected in the rotating groove.

[0010] In order to improve the mixing effect of the mixing cylinder, preferably, a piston cylinder is fixedly connected to the rotating frame, a piston shaft is slidably connected in the piston cylinder, a reciprocating assembly is provided on the rotating frame, and the reciprocating assembly is used to drive the piston shaft to slide reciprocatingly, a rotating groove is provided on the rotating disk, an air inlet and an exhaust pipe are provided on the piston cylinder, the other end of the exhaust pipe faces the rotating groove, the rotating groove is connected to an air outlet pipe, a fixed plate is fixedly connected to the rotating shaft, and the fixed plate is rotatably connected to the rotating groove.

[0011] Preferably, the reciprocating assembly comprises a cam, the cam is fixedly connected to the output end of the driving motor, a piston spring is arranged in the piston cylinder, and two ends of the piston spring are respectively fixedly connected to the piston cylinder and the piston shaft.

[0012] In order to limit the sliding of the extrusion seat during mixing, preferably, the other end of the air outlet pipe is connected to the mixing barrel, the air outlet pipe is located at the upper end of the extrusion seat, and a limiting component is provided on the guide plate.

[0013] Preferably, the limit assembly includes: an upper sliding groove arranged on the guide plate; a limit block slidably connected to the upper sliding groove; wherein a limit groove is provided on the extrusion seat, and the limit block is inserted into the limit groove; a clamping spring, the two ends of which are respectively fixedly connected to the mixing barrel and the limit block; a lower sliding groove arranged on the mixing barrel, the lower sliding groove is communicated with the upper sliding groove; a counterweight block slidably connected to the lower sliding groove; an elastic pull rope, the two ends of which are respectively fixedly connected to the counterweight block and the mixing barrel.

[0014] In order to facilitate the sliding of the counterweight block, preferably, a rotating ball is rotatably connected to the counterweight block.

[0015] In order to improve the cleaning effect of the inner wall of the mixing cylinder, preferably, the extrusion seat is rotatably connected to a rotating head, the rotating head is provided with a blowing pipe, the blowing pipe is connected to a connecting clamping pipe, the rotating head is fixedly connected to a fan blade, the fan blade is rotatably connected in the extrusion seat, an air guide pipe passes through the extrusion seat, one end of the air guide pipe is connected to the connecting clamping pipe, and the other end of the air guide pipe passes through the mixing cylinder and is externally connected to an air pump.

[0016] Preferably, an elastic rope is fixedly connected to the upper end of the extrusion seat, and the other end of the elastic rope is fixedly connected to the mixing cylinder.

[0017] A heavy metal content detection device comprises a detection instrument, wherein the detection instrument is provided with a display screen and a detection slot, wherein a closing cover is rotatably connected to the detection slot, and further comprises a cleaning and mixing mechanism, wherein a support frame is fixedly connected to the detection instrument.

[0018] A method for detecting heavy metal content mainly comprises the following steps:

[0019] S1. Add the marine food to be tested and the oxidizing strong acid into the mixing cylinder through the feeding port, which is located at the lower end of the extrusion seat;

[0020] S2, rotating the rotating frame, setting the mixing drum horizontally, and starting the driving motor, the driving motor drives the mixing drum to rotate, when the mixing drum rotates, the marine food mixture is mixed by the guide plate;

[0021] S3, when the driving motor is working, it will drive the cam to rotate and cooperate with the piston spring, thereby driving the piston shaft to slide back and forth, and the gas in the piston cylinder is discharged through the exhaust pipe and enters the rotating groove, thereby driving the fixed plate, the rotating shaft, and the mixing cylinder to rotate around the axis of the rotating shaft;

[0022] When the fixed plate rotates and passes over the outlet pipe, the gas in the rotating tank is discharged through the outlet pipe, so that the gas in the rotating tank is reduced and the air pressure is restored. At this time, under the action of the weight block, the mixing cylinder, the rotating shaft and the fixed plate are reset. However, since the gas in the rotating tank is always replenished, the fixed plate reciprocates, that is, the piston cylinder reciprocates, which promotes the mixing of the marine food mixture.

[0023] The gas in the gas outlet cylinder enters the mixing cylinder and the upper end of the extrusion seat to press the extrusion seat to slide;

[0024] S4. After the mixing is completed, under the action of the weight block, the discharge port of the mixing cylinder faces downward, the limit assembly is opened, the extrusion seat moves downward, and the marine food mixture in the mixing cylinder is extruded and discharged from the discharge port, and the discharge port is directed toward the detection tank, so as to facilitate the detection of heavy metals in the marine food mixture;

[0025] S5. Conduct heavy metal testing on the marine food mixture using testing instruments.

[0026] Compared with the prior art, the present invention provides a cleaning mixing mechanism, a heavy metal content detection device and a detection method, which have the following beneficial effects:

[0027] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. When the mixing cylinder is vertical, the present invention is convenient for discharging the marine food mixture in the mixing cylinder, that is, when the extrusion seat moves downward, it will fit with the inner wall of the mixing cylinder, and the residue on the inner wall of the mixing cylinder will be scraped off and dropped; when the mixing cylinder is horizontal, it is convenient for mixing the marine food mixture in the mixing cylinder, and it is convenient to mix the marine food and the oxidizing strong acid, thereby improving the mixing effect. At the same time, in conjunction with the sliding extrusion seat, the gas in the mixing cylinder can be squeezed and discharged to prevent the retention of residues, thereby improving the accuracy of the next test result. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a cleaning and mixing mechanism, a heavy metal content detection device and a detection method proposed by the present invention;

[0029] Figure 2 A schematic diagram of the structure of a mixing barrel of a cleaning mixing mechanism, a heavy metal content detection device and a detection method proposed by the present invention;

[0030] Figure 3 A cleaning mixing mechanism, a heavy metal content detection device and a detection method proposed by the present invention Figure 2 The structural diagram of part A in the figure;

[0031] Figure 4 A cleaning mixing mechanism, a heavy metal content detection device and a detection method proposed by the present invention Figure 2 The structural diagram of part B;

[0032] Figure 5 A schematic diagram of the structure of an extrusion seat of a cleaning and mixing mechanism, a heavy metal content detection device and a detection method proposed by the present invention;

[0033] Figure 6 A schematic diagram of the structure of a fan blade of a cleaning and mixing mechanism, a heavy metal content detection device and a detection method proposed by the present invention;

[0034] Figure 7 A schematic diagram of the structure of a cam of a cleaning and mixing mechanism, a heavy metal content detection device and a detection method proposed by the present invention;

[0035] Figure 8 The present invention provides a schematic structural diagram of a cleaning and mixing mechanism, a heavy metal content detection device and a rotating tank detection method.

[0036] In the figure: 1. Detection instrument; 101. Display screen; 102. Detection slot; 103. Closing cover; 2. Support frame; 201. Rotating disk; 202. Rotating protrusion; 203. Rotating slot; 204. Rotating shaft; 205. Exhaust pipe; 206. Rotating frame; 207. Exhaust pipe; 3. Mixing cylinder; 301. Rotating groove; 302. Guide plate; 303. Lower sliding slot; 304. Elastic drawstring; 305. Counterweight; 306, rotating ball; 307, upper sliding groove; 308, limit block; 309, clamping spring; 4, driving motor; 401, cam; 402, piston cylinder; 403, piston shaft; 404, piston spring; 5, extrusion seat; 5001, limit slot; 501, elastic rope; 502, rotating head; 503, blowing pipe; 504, connecting pipe; 505, fan blade; 506, air guide pipe. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] Embodiment 1:

[0040] Reference Figure 1-Figure 8 A heavy metal content detection device comprises a detection instrument 1, on which a display screen 101 and a detection slot 102 are provided, on which a closing cover 103 is rotatably connected, and further comprises: a cleaning and mixing mechanism, which comprises a support frame 2 fixedly connected to the detection instrument 1; a rotating frame 206 rotatably connected to the support frame 2; a mixing barrel 3 rotatably connected to the rotating frame 206; wherein a weight block is provided at the bottom of the mixing barrel 3, and a feeding port is provided on the side wall of the mixing barrel 3; a driving motor 4 fixedly connected to the rotating frame 206, and the mixing barrel 3 is fixedly connected to the output end of the driving motor 4; a guide plate 302 fixedly connected in the mixing barrel 3; wherein the guide plate 302 is provided in multiple groups; an extrusion seat 5 slidably connected in the mixing barrel 3, for extruding residues remaining on the inner wall of the mixing barrel 3.

[0041] The support frame 2 is fixedly connected with a rotating disk 201, the rotating frame 206 is fixedly connected with a rotating shaft 204, the rotating shaft 204 is rotatably connected to the rotating disk 201, the rotating frame 206 is fixedly connected with a rotating protrusion 202, the mixing barrel 3 is provided with a rotating groove 301, and the rotating protrusion 202 is rotatably connected in the rotating groove 301;

[0042] When the mixing cylinder 3 is vertical, it is convenient to discharge the marine food mixture in the mixing cylinder 3, that is, when the extrusion seat 5 moves downward, it will fit with the inner wall of the mixing cylinder 3 to scrape and remove the residue on the inner wall of the mixing cylinder 3;

[0043] When the mixing drum 3 is horizontal, it is convenient to mix the marine food mixture in the mixing drum 3 .

[0044] The rotating frame 206 is fixedly connected with a piston cylinder 402, and a piston shaft 403 is slidably connected in the piston cylinder 402. A reciprocating assembly is provided on the rotating frame 206, and the reciprocating assembly is used to drive the piston shaft 403 to slide back and forth. The rotating disk 201 is provided with a rotating groove 203, and the piston cylinder 402 is provided with an air inlet and an exhaust pipe 205. The other end of the exhaust pipe 205 faces the rotating groove 203. The rotating groove 203 is connected with an exhaust pipe 207. The rotating shaft 204 is fixedly connected with a fixed plate, and the fixed plate is rotatably connected to the rotating groove 203.

[0045] Both the air inlet and the exhaust pipe 205 are provided with a one-way valve to guide the flow direction of the gas;

[0046] The gas in the piston cylinder 402 is discharged through the exhaust pipe 205 and enters the rotating groove 203, thereby driving the fixed plate, the rotating shaft 204, and the mixing cylinder 3 to rotate around the axis of the rotating shaft 204;

[0047] When the fixed plate rotates and passes over the air outlet pipe 207, the gas in the rotating groove 203 is discharged through the air outlet pipe 207, so that the gas in the rotating groove 203 is reduced and the air pressure is restored. At this time, under the action of the weight block, the mixing cylinder 3, the rotating shaft 204 and the fixed plate are reset. However, since the gas in the rotating groove 203 is always replenished, the fixed plate reciprocates, that is, the piston cylinder 3 reciprocates, and shakes in the air outlet pipe 207 to promote the mixing of the marine food mixture.

[0048] The reciprocating assembly includes a cam 401, which is fixedly connected to the output end of the driving motor 4. A piston spring 404 is provided in the piston cylinder 402, and both ends of the piston spring 404 are fixedly connected to the piston cylinder 402 and the piston shaft 403 respectively.

[0049] When the driving motor 4 is working, it can drive the cam 401 to rotate, and the cam 401 cooperates with the piston spring 404 to realize the reciprocating sliding of the piston shaft 403 .

[0050] The other end of the air outlet pipe 207 is connected to the mixing cylinder 3. The air outlet pipe 207 is located at the upper end of the extrusion seat 5. A limiting component is provided on the guide plate 302.

[0051] When the limiting assembly is working, the gas enters the mixing barrel 3 and is accumulated, so that the gas pressure at the upper end of the extrusion seat 5 increases. When the limiting assembly is opened, the gas pushes the extrusion seat 5 to move downward.

[0052] The limiting assembly includes: an upper sliding groove 307 arranged on the guide plate 302; a limiting block 308 slidably connected to the upper sliding groove 307; wherein a limiting groove 5001 is arranged on the extrusion seat 5, and the limiting block 308 is inserted into the limiting groove 5001; a clamping spring 309, the two ends of which are respectively fixedly connected to the mixing cylinder 3 and the limiting block 308; a lower sliding groove 303 arranged on the mixing cylinder 3, the lower sliding groove 303 is communicated with the upper sliding groove 307; a counterweight 305 slidably connected to the lower sliding groove 303; an elastic pull rope 304, the two ends of which are respectively fixedly connected to the counterweight 305 and the mixing cylinder 3;

[0053] Specifically, when the mixing cylinder 3 is horizontal, the elastic pull rope 304 pulls the counterweight block 305 to slide, so that the counterweight block 305 squeezes the gas in the lower sliding groove 303 into the upper piston groove 307, so as to squeeze the limit block 308 to slide, so that the limit block 308 slides and is clamped into the limit groove 5001 of the extrusion seat 5;

[0054] When the mixing cylinder 3 is vertical, the counterweight 305 moves downward under the action of its own gravity, the lower sliding groove 303 extracts the gas in the upper sliding groove 307, and the limit block 308 is reset without blocking the extrusion seat 5.

[0055] The counterweight block 305 is rotatably connected with a rotating ball 306 to facilitate the sliding of the counterweight block 305 when it is horizontal.

[0056] The extrusion seat 5 is rotatably connected to a rotating head 502, the rotating head 502 is provided with a blowing pipe 503, the blowing pipe 503 is connected to a connecting clamping pipe 504, the rotating head 502 is fixedly connected to a fan blade 505, the fan blade 505 is rotatably connected to the extrusion seat 5, and an air guide pipe 506 is passed through the extrusion seat 5, one end of the air guide pipe 506 is connected to the connecting clamping pipe 504, and the other end of the air guide pipe 506 passes through the mixing cylinder 3 and is externally connected to an air pump;

[0057] It should be noted that the upper portion of the connecting clamp pipe 504 is annularly arranged, and the lower portion is tubularly arranged to communicate with the blowing pipe 503;

[0058] When the extrusion seat 5 moves downward, the air pump works to send the gas through the air guide pipe 506 into the connecting clamp pipe 504 and the blowing pipe 503 to be discharged, and then the gas blows the inner wall of the mixing cylinder 3 to make the remaining seafood mixture move downward;

[0059] When the gas passes through the fan blades 505, the fan blades 505 are driven to rotate, and the fan blades 505 drive the rotating head 502 to rotate, so that the blowing tube 503 is sprayed out in a rotating manner to blow the inner wall of the mixing cylinder 3, and the blowing area is large.

[0060] The upper end of the extrusion seat 5 is fixedly connected to an elastic rope 501, and the other end of the elastic rope 501 is fixedly connected to the mixing cylinder 3. After the marine food mixture is discharged, the air outlet pipe 207 is pulled out from the mixing cylinder 3, so that the air pressure on the upper part of the extrusion seat 5 returns to normal pressure, and the extrusion seat 5 is reset under the tension of the elastic rope 501.

[0061] Embodiment 2:

[0062] Reference Figure 1-Figure 8 , a method for detecting heavy metal content, mainly comprising the following steps:

[0063] S1, adding the marine food to be tested and the oxidizing strong acid into the mixing cylinder 3 through the feeding port, and located at the lower end of the extrusion seat 5;

[0064] S2, when the mixing cylinder 3 is vertical, it is convenient to discharge the marine food mixture in the mixing cylinder 3, that is, when the extrusion seat 5 moves downward, it will fit with the inner wall of the mixing cylinder 3, and the residue on the inner wall of the mixing cylinder 3 will be scraped off;

[0065] When the mixing cylinder 3 is horizontal, it is convenient to mix the marine food mixture in the mixing cylinder 3;

[0066] Rotate the rotating frame 206 to horizontally place the mixing drum 3, and start the driving motor 4, so that the driving motor 4 drives the mixing drum 3 to rotate. When the mixing drum 3 rotates, the marine food mixture is mixed under the action of the guide plate 302;

[0067] S3, when the driving motor 4 is working, it can drive the cam 401 to rotate, and the cam 401 cooperates with the piston spring 404 to realize the reciprocating sliding of the piston shaft 403, and the gas in the piston cylinder 402 is discharged through the exhaust pipe 205 and enters the rotating groove 203, thereby driving the fixed plate, the rotating shaft 204, and the mixing cylinder 3 to rotate around the axis of the rotating shaft 204;

[0068] When the fixed plate rotates and passes over the air outlet pipe 207, the gas in the rotating groove 203 is discharged through the air outlet pipe 207, so that the gas in the rotating groove 203 is reduced and the air pressure is restored. At this time, under the action of the weight block, the mixing cylinder 3, the rotating shaft 204 and the fixed plate are reset. However, since the gas in the rotating groove 203 is always replenished, the fixed plate reciprocates, that is, the piston cylinder 3 reciprocates, and shakes in the air outlet pipe 207 to promote the mixing of the marine food mixture;

[0069] When the limiting assembly is working, the gas enters the mixing barrel 3 and is accumulated, so that the gas pressure at the upper end of the extrusion seat 5 increases;

[0070] It should be noted that there is gas between the extrusion seat 5 and the marine food, that is, when the extrusion seat 5 is vertical, no residue remains on the lower wall of the extrusion seat 5, and the rotating head 502 is arranged to rotate, and the residues retained thereon are discharged by centrifugal force;

[0071] S4. After the mixing is completed, under the action of the weight block, the discharge port of the mixing barrel 3 faces downward, the counterweight block 305 moves downward, the lower sliding groove 303 extracts the gas in the upper sliding groove 307, and the limit block 308 is reset without blocking the extrusion seat 5;

[0072] When the extrusion seat 5 moves downward, the air pump works to send the gas through the air guide pipe 506 into the connecting clamp pipe 504 and the blowing pipe 503 to be discharged, and then the gas blows the inner wall of the mixing cylinder 3 to make the remaining seafood mixture move downward;

[0073] When the gas passes through the fan blade 505, the fan blade 505 is driven to rotate, and the fan blade 505 drives the rotating head 502 to rotate, so that the blowing tube 503 is sprayed out in a rotating manner, blowing the inner wall of the mixing cylinder 3, and the blowing area is large;

[0074] After the marine food mixture is discharged, the air outlet pipe 207 is pulled out from the mixing cylinder 3, so that the air pressure on the upper part of the extrusion seat 5 returns to normal pressure, and the extrusion seat 5 is reset under the tension of the elastic rope 501;

[0075] With the discharge port facing the detection tank 102, the marine food mixture is added into the detection tank 102, so as to facilitate the detection of heavy metals in the marine food mixture;

[0076] S5. Perform heavy metal detection on the marine food mixture by using the detection instrument 1.

[0077] The present invention provides a mixing cylinder 3 that can be horizontal or vertical, which is convenient for mixing marine food and oxidizing strong acid and improves the mixing effect. At the same time, the sliding extrusion seat 5 can squeeze and discharge the gas in the mixing cylinder 3 to prevent residue from being left, thereby improving the accuracy of the next test result.

[0078] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cleaning and mixing mechanism, comprising a support frame (2); Rotating a rotating frame (206) connected to the supporting frame (2); Rotating a mixing drum (3) connected to the rotating frame (206); in, A weight block is provided at the bottom of the mixing cylinder (3), and a feeding port is provided on the side wall of the mixing cylinder (3); A driving motor (4) fixedly connected to the rotating frame (206), and the mixing cylinder (3) fixedly connected to the output end of the driving motor (4); A guide plate (302) fixedly connected to the mixing cylinder (3); Wherein, the guide plates (302) are provided in multiple groups; An extrusion seat (5) slidably connected to the mixing cylinder (3) and used for extruding residues remaining on the inner wall of the mixing cylinder (3); The support frame (2) is fixedly connected to a rotating disk (201), the rotating frame (206) is fixedly connected to a rotating shaft (204), the rotating shaft (204) is rotatably connected to the rotating disk (201), the rotating frame (206) is fixedly connected to a rotating protrusion (202), the mixing barrel (3) is provided with a rotating groove (301), and the rotating protrusion (202) is rotatably connected in the rotating groove (301); The rotating disk (201) is provided with a rotating groove (203), the rotating groove (203) is connected to an air outlet pipe (207), the other end of the air outlet pipe (207) is connected to the mixing cylinder (3), the air outlet pipe (207) is located at the upper end of the extrusion seat (5), and the guide plate (302) is provided with a limit assembly; the limit assembly comprises: An upper sliding groove (307) provided on the guide plate (302); A limit block (308) slidably connected to the upper sliding groove (307); Wherein, the extrusion seat (5) is provided with a limit card slot (5001), and the limit card block (308) is inserted into the limit card slot (5001); A clamping spring (309), the two ends of which are respectively fixedly connected to the mixing cylinder (3) and the limiting clamping block (308); A lower sliding groove (303) provided on the mixing barrel (3), the lower sliding groove (303) being in communication with the upper sliding groove (307); A counterweight block (305) slidably connected to the lower sliding groove (303); The two ends of the elastic pull rope (304) are respectively fixedly connected to the counterweight block (305) and the mixing cylinder (3); and a rotating ball (306) is rotatably connected to the counterweight block (305).

2. The cleaning and mixing mechanism according to claim 1, characterized in that: A piston cylinder (402) is fixedly connected to the rotating frame (206), a piston shaft (403) is slidably connected inside the piston cylinder (402), a reciprocating assembly is provided on the rotating frame (206), the reciprocating assembly is used to drive the piston shaft (403) to slide back and forth, an air inlet and an exhaust pipe (205) are provided on the piston cylinder (402), the other end of the exhaust pipe (205) faces the rotating groove (203), and a fixing plate is fixedly connected to the rotating shaft (204), and the fixing plate is rotatably connected to the rotating groove (203).

3. The cleaning and mixing mechanism according to claim 2, characterized in that: The reciprocating assembly comprises a cam (401), the cam (401) being fixedly connected to the output end of the driving motor (4), a piston spring (404) being arranged in the piston cylinder (402), and two ends of the piston spring (404) being fixedly connected to the piston cylinder (402) and the piston shaft (403), respectively.

4. The cleaning and mixing mechanism according to claim 3, characterized in that: The extrusion seat (5) is rotatably connected to a rotating head (502), the rotating head (502) is provided with a blowing pipe (503), the blowing pipe (503) is connected to a connecting clamping pipe (504), the rotating head (502) is fixedly connected to a fan blade (505), the fan blade (505) is rotatably connected in the extrusion seat (5), an air guide pipe (506) is passed through the extrusion seat (5), one end of the air guide pipe (506) is connected to the connecting clamping pipe (504), and the other end of the air guide pipe (506) passes through the mixing cylinder (3) and is externally connected to an air pump.

5. The cleaning and mixing mechanism according to claim 3, characterized in that: An elastic rope (501) is fixedly connected to the upper end of the extrusion seat (5), and the other end of the elastic rope (501) is fixedly connected to the mixing cylinder (3).

6. A heavy metal content detection device, characterized in that: The invention comprises a detection device (1), wherein the detection device (1) is provided with a display screen (101) and a detection slot (102), wherein a closing cover (103) is rotatably connected to the detection slot (102), and is characterized in that it also comprises: a cleaning and mixing mechanism as claimed in any one of claims 3 to 5, wherein a support frame (2) is fixedly connected to the detection device (1).

7. A detection method using the heavy metal content detection device according to claim 6, characterized in that: The main steps include: S1. Add the marine food to be tested and the oxidizing strong acid into the mixing cylinder (3) through the feeding port, which is located at the lower end of the extrusion seat (5); S2, rotating the rotating frame (206), placing the mixing drum (3) horizontally, and starting the driving motor (4), so that the driving motor (4) drives the mixing drum (3) to rotate, and when the mixing drum (3) rotates, the marine food mixture is mixed under the action of the guide plate (302); S3, when the driving motor (4) is working, it drives the cam (401) to rotate and cooperate with the piston spring (404), thereby driving the piston shaft (403) to slide back and forth, and discharge the gas in the piston cylinder (402) through the exhaust pipe (205) and enter the rotating groove (203), thereby driving the fixed plate, the rotating shaft (204), and the mixing cylinder (3) to rotate around the axis of the rotating shaft (204); When the fixed plate rotates and passes over the air outlet pipe (207), the gas in the rotating groove (203) is discharged through the air outlet pipe (207), so that the gas in the rotating groove (203) is reduced and the air pressure is restored. At this time, under the action of the weight block, the mixing cylinder (3), the rotating shaft (204) and the fixed plate are reset. However, since the gas in the rotating groove (203) is always replenished, the fixed plate reciprocates, that is, the piston cylinder (402) reciprocates, thereby promoting the mixing of the marine food mixture; The gas in the gas outlet pipe (207) enters the mixing cylinder (3) and the upper end of the extrusion seat (5) to press the extrusion seat (5) to slide; S4. After the mixing is completed, under the action of the weight block, the discharge port of the mixing barrel (3) is directed downward, the limit assembly is opened, the extrusion seat (5) is moved downward, and the marine food mixture in the mixing barrel (3) is extruded and discharged from the discharge port, and the discharge port is directed toward the detection tank (102), so as to facilitate the detection of heavy metals in the marine food mixture; S5. Perform heavy metal testing on the marine food mixture using the testing instrument (1).

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