Heavy metal detection device and method for food grade potassium chloride production

Abstract

The present invention discloses a heavy metal detection device and method for the production of food-grade potassium chloride, including a frame, a screw lifting module, a waste receiving bucket and a liquid storage component are installed on the frame, a lifting arm is provided on the screw lifting module, a detection component and a liquid distribution module are installed in the loading arm, a transmission module is provided above the waste receiving bucket, a rotatable indexing frame is connected to the transmission module, and a group of test dish mechanisms distributed in a circumferential array are provided on the periphery of the indexing frame. The present invention enables the detection device to perform a shunt-type continuous automatic repeated detection on a single sample to be detected through the arrangement of the liquid distribution module, the diverter valve and a plurality of test dish mechanisms, and then multiple verifications of the detection effect can be achieved through repeated automatic detection, thereby improving the detection accuracy of the detection device for heavy metals.

Description

Technical Field

[0001] The invention relates to the technical field of heavy metal detection devices, and in particular to a heavy metal detection device and method for producing food-grade potassium chloride. Background Art

[0002] Before potassium chloride is produced and consumed, it is necessary to detect heavy metals in potassium chloride. In the prior art, various types of heavy metal detection devices have appeared. For example, the patent document with publication number CN112378897B discloses a heavy metal detection device for food production, including a bracket and a detection mechanism arranged on the bracket, the detection mechanism includes a heavy metal detection device arranged on the bracket and a control unit electrically connected to the heavy metal detection device, the heavy metal detection device includes a shell and a perforation for a food material pipe to pass through, the tube section of the food material pipe located in the shell is constructed as a heavy metal detection tube section, the heavy metal detection tube section is at least partially made of a light-transmitting material, and a light source for emitting detection light to the light-transmitting part of the heavy metal detection tube section is arranged in the shell. Compared with the X-ray fluorescence detection method, the above device does not generate additional harmful rays, ensuring that it will not have adverse effects on production personnel or the food itself, but the above detection device has the following technical problems when used:

[0003] It is not possible to conduct continuous automatic repeated detection of a single sample to be detected, which makes it difficult to improve the detection accuracy;

[0004] It is not possible to automatically collect waste samples after testing, automatically clean the vessels containing samples, and restore the vessels containing samples to a reusable state;

[0005] It is not possible to perform self-cleaning calibration on the testing mechanism after the completion of a single test to be tested, and then maintain the testing accuracy of the testing mechanism;

[0006] Based on this, the present invention provides a heavy metal detection device and method for the production of food-grade potassium chloride to solve the technical problems raised in the above background technology. Summary of the invention

[0007] In view of the deficiencies in the prior art, the object of the present invention is to provide a heavy metal detection device and method for the production of food-grade potassium chloride. The present invention, through the arrangement of a liquid distribution module, a diverter valve and multiple test dish mechanisms, enables the detection device to perform diverter-type continuous automatic repeated detection on a single sample to be detected. Through repeated automatic detection, multiple verifications of the detection effect can be achieved, thereby improving the detection accuracy of the detection device for heavy metals.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical scheme, a heavy metal detection device for the production of food-grade potassium chloride, the technical scheme adopted is: comprising a frame, the frame is equipped with a screw lifting module, a waste receiving bucket and a liquid storage component, the screw lifting module is provided with a lifting and lowering carrying arm, the carrying arm is provided with a detection component and a liquid preparation module, a transmission module is provided above the waste receiving bucket, the transmission module is connected to a rotatable transfer frame, and the outer periphery of the transfer frame is provided with a group of test dish mechanisms distributed in a circular array.

[0009] In a preferred embodiment, the detection component comprises an inspection platform slidably connected to the carrying arm, a horizontally arranged micro-motion push rod is installed between the inspection platform and the carrying arm, and a heavy metal detector is arranged in the inspection platform.

[0010] As a preferred solution, the liquid storage assembly includes a liquid storage box fixedly connected to the frame, and the liquid storage box supplies liquid to the liquid pump module.

[0011] As a preferred solution, the test dish mechanism has a flip ring, and the inner wall of the flip ring is rotatably connected with a linkage sleeve.

[0012] As a preferred solution, a shaft groove with openings at both ends and slidably connected to the transmission guide shaft is fixedly opened in the linkage sleeve, and the cross-sections of the shaft groove and the transmission guide shaft are both regular polygons.

[0013] As a preferred solution, the stirring assembly has a lower stirring shaft, and the lower stirring shaft is connected to the transmission guide shaft through a belt.

[0014] As a preferred solution, the test dish mechanism has a flip shaft, and the flow distribution component includes a first flow channel opened in the flip shaft and opened at both ends, an annular cavity opened in the flip ring, and a second flow channel opened in the lower stirring shaft.

[0015] As a preferred solution, the test dish mechanism has a dish barrel, the liquid dispensing module includes a liquid dispensing bucket fixed to the inner wall of the carrier arm, and the lower part of the liquid dispensing bucket and the position corresponding to each test dish mechanism are connected to a diverter valve with the liquid outlet direction facing the dish barrel.

[0016] The invention relates to a heavy metal detection method for the production of food-grade potassium chloride, and a heavy metal detection device for the production of food-grade potassium chloride.

[0017] Compared with the prior art, the present invention provides a heavy metal detection device and method for the production of food-grade potassium chloride, which has the following beneficial effects:

[0018] 1. The present invention, through the arrangement of a liquid dispensing module, a diverter valve and a plurality of test dish mechanisms, enables the detection device to perform diverter-type continuous automatic repeated detection on a single sample to be detected. Through repeated automatic detection, multiple verifications of the detection effect can be achieved, thereby improving the detection accuracy of the detection device for heavy metals.

[0019] 2. The present invention adopts the reversible structure setting of the dish cylinder in the test dish mechanism, so that after the sample is tested, the device can automatically collect the waste sample after the test and automatically clean the dish carrying the sample, so that the dish carrying the sample can be restored to a reusable state. Through the realization of the above technical effects, on the one hand, the functionality of the device can be effectively improved, and on the other hand, the ease of maintenance of the device can be effectively improved.

[0020] 3. After a single test is completed, the present invention can self-clean and self-dry the probe body to achieve self-cleaning calibration of the probe body, thereby effectively maintaining the detection accuracy of the device during continuous sample detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a heavy metal detection device for producing food-grade potassium chloride according to the present invention;

[0022] Figure 2 For the present invention Figure 1 A schematic diagram of the structure from another perspective;

[0023] Figure 3 It is a structural schematic diagram of the liquid dispensing bucket and the carrying arm of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the upper nozzle and the cleaning nozzle hole d of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the heavy metal detector and the micro-motion push rod of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the dish cylinder and the spring of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the lower stirring shaft and the driven pressure frame of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the driven pressure frame and the rotary sealing seat of the present invention;

[0029] Fig. 9 For the present invention Figure 8 A schematic diagram of the local enlarged structure at point A in the middle;

[0030] Fig.10 For the present invention Figure 8 A schematic diagram of the local enlarged structure at B in the middle;

[0031] Fig.11 It is a schematic structural diagram of the lower stirring rod and the cleaning spray hole c of the present invention.

[0032] In the figure: 1, frame; 2, screw lifting module; 3, waste bucket; 4, carrying arm; 5, indexing frame; 6, inspection table; 7, micro push rod; 8, heavy metal detector; 9, probe body; 10, active pressure ring; 11, pump liquid module; 12, liquid separation ring; 13, self-cleaning nozzle; 14, electric heating ring; 15, liquid storage tank; 16, water pipe; 17, liquid distribution chamber; 18, bracket; 19, upper bevel gear ring; 20, lower bevel gear ring; 21, motor; 22, driven pressure frame; 23, flip Rotating ring; 24, turning shaft; 25, rotary seal seat; 26, dish cylinder; 27, outer rotating sleeve; 28, linkage sleeve; 29, transmission guide shaft; 30, spring; 31, rubber sealing brush ring; 32, diverter valve; 33, cleaning spray hole a; 34, cleaning spray hole b; 35, lower stirring shaft; 36, lower stirring rod; 37, cleaning spray hole c; 38, reverse cone gear; 39, connecting pipe; 40, liquid distribution bucket; 41, upper stirring shaft; 42, upper nozzle; 43, upper stirring rod; 44, cleaning spray hole d. DETAILED DESCRIPTION

[0033] The present invention will be further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0034] See also Figure 1-11 The present invention: A heavy metal detection device for the production of food-grade potassium chloride, the technical scheme adopted is: comprising a frame 1, a screw lifting module 2, a waste receiving bucket 3 and a liquid storage component are installed on the frame 1, a lifting and lowering carrying arm 4 is provided on the screw lifting module 2, a detection component and a liquid distribution module are installed in the carrying arm 4, a transmission module is provided above the waste receiving bucket 3, the transmission module is connected to a rotatable transfer frame 5, and a group of test dish mechanisms distributed in a circumferential array are provided on the outer periphery of the transfer frame 5;

[0035] The liquid preparation module mixes potassium chloride and the reaction liquid and distributes the proportioned liquid to be tested to each test dish mechanism. The test dish mechanism stores the proportioned liquid to be tested distributed by the liquid storage component and stirs the proportioned liquid to be tested. The detection component automatically detects the proportioned liquid to be tested stored in each test dish mechanism in turn, and self-cleans, self-dries and self-calibrates after each detection. After the detection is completed, the test dish mechanism automatically turns over and inverts to exclude the tested proportioned liquid to be tested and brushes for self-cleaning. The liquid storage component delivers cleaning liquid to the detection component and each test dish mechanism in a timely manner.

[0036] The detection component includes a detection platform 6 slidably connected to the carrier arm 4, a horizontally arranged micro-movement push rod 7 is installed between the detection platform 6 and the carrier arm 4, a heavy metal detector 8 is arranged in the detection platform 6, and a probe body 9 is installed at the detection end of the heavy metal detector 8;

[0037] By setting the heavy metal detector 8 and the probe body 9, the sample liquid to be tested stored in the test dish mechanism is tested for heavy metals;

[0038] The heavy metal detector 8 is a common component in the prior art. The detection principle of the heavy metal detector 8 has been disclosed in existing documents and will not be described here in detail.

[0039] An active pressure ring 10 is installed at the lower part of the inspection table 6, and a pump liquid module 11 connected to the liquid storage component is installed on the side of the inspection table 6. The liquid outlet end of the pump liquid module 11 is connected to a liquid separator ring 12. The inner cavity of the liquid separator ring 12 is connected to a group of self-cleaning nozzles 13 distributed in a circular array. An electric heating ring 14 coaxially arranged with the probe body 9 is provided below the liquid separator ring 12.

[0040] The pump liquid module 11 includes a pump body fixed to the side of the inspection table 6, the pump body is connected to the liquid storage component through a hose and supplies liquid through the liquid storage component, and the liquid outlet port of the pump body is fixedly connected to the liquid separation ring 12;

[0041] The liquid storage assembly includes a liquid storage tank 15 fixedly connected to the frame 1, the liquid storage tank 15 supplies liquid to the pump liquid module 11, a water pump is installed at the inner bottom of the liquid storage tank 15, the liquid outlet port of the water pump is fixedly connected to a water pipe 16, a liquid distribution cavity 17 is fixedly opened inside the indexing frame 5, the liquid outlet port of the water pipe 16 is rotatably connected to the liquid distribution cavity 17, and a one-way liquid outlet valve is fixedly installed inside the water pipe 16;

[0042] By setting the one-way liquid outlet valve, the liquid in the water pipe 16 can only be sent into the liquid distribution chamber 17 in one direction through the water pipe 16 .

[0043] The transmission module includes a bracket 18 fixed above the waste receiving bucket 3, the transfer frame 5 is rotatably sleeved with an upper bevel gear ring 19, the upper bevel gear ring 19 is rotatably sleeved with a lower bevel gear ring 20, the lower bevel gear ring 20 is rotatably connected to the bracket 18, and three motors 21 are installed on the outside of the bracket 18, and the upper bevel gear ring 19, the lower bevel gear ring 20 and the transfer frame 5 are respectively driven by a motor 21.

[0044] The test dish mechanism comprises a driven pressure frame 22, a turnover ring 23, a turnover shaft 24 fixedly connected to the turnover ring 23 and a rotary sealing seat 25. The inner wall of the turnover ring 23 is rotatably connected with a dish cylinder 26 with two ends opened. The tail end of the turnover shaft 24 is rotatably connected with the indexing frame 5. The turnover shaft 24 is rotatably sleeved with an outer rotating sleeve 27. The turnover shaft 24 is driven by the upper bevel gear ring 19. The outer rotating sleeve 27 and the dish cylinder 26 are both driven by the lower bevel gear ring 20.

[0045] A first bevel gear is fixedly mounted on the outer periphery of the flip shaft 24 and is transmission-connected to the upper bevel gear ring 19;

[0046] The outer periphery of the outer rotating sleeve 27 is fixedly mounted with a second bevel gear which is transmission-connected to the lower bevel gear ring 20;

[0047] The outer circumference of the outer rotating sleeve 27 is also fixedly mounted with a third bevel gear, and the outer circumference of the dish cylinder 26 is fixedly mounted with a passive bevel gear ring that is transmission-connected with the third bevel gear;

[0048] The axis of the flip shaft 24 is perpendicular to the rotation axis of the indexing frame 5;

[0049] The inner wall of the flip ring 23 is rotatably connected to a linkage sleeve 28 driven by a dish cylinder 26;

[0050] The outer periphery of the linkage sleeve 28 is fixedly mounted with a fourth bevel gear meshing with the passive bevel gear ring;

[0051] A transmission guide shaft 29 is transmission-connected inside the linkage sleeve 28;

[0052] The linkage sleeve 28 has a shaft groove with two ends open and slidably connected to the transmission guide shaft 29. The cross sections of the shaft groove and the transmission guide shaft 29 are both regular polygons.

[0053] By setting the regular polygonal cross section of the shaft groove and the transmission guide shaft 29, when the driven pressure frame 22 is displaced, the linkage sleeve 28 can continuously drive the transmission guide shaft 29;

[0054] The transmission guide shaft 29 and the rotary sealing seat 25 are both rotatably connected to the driven pressure frame 22;

[0055] A spring 30 is sleeved on the outer periphery of the transmission guide shaft 29 and corresponds to the position between the driven pressure frame 22 and the linkage sleeve 28;

[0056] A rubber sealing brush ring 31 is fixedly mounted on the outer wall of the rotary sealing seat 25, and a stirring assembly driven by a transmission guide shaft 29 is mounted inside the rotary sealing seat 25;

[0057] A guide cone is fixedly provided on the top of the rotary seal seat 25, a liquid filling chamber is fixedly opened inside the rotary seal seat 25, cleaning spray holes a33 connected to the liquid filling chamber are evenly distributed on the guide cone, cleaning spray holes b34 connected to the liquid filling chamber are evenly distributed on the outer periphery of the rotary seal seat 25, and a diverter assembly is installed in the flip ring 23, and the diverter assembly is respectively connected to the liquid filling chamber and the liquid distribution chamber 17.

[0058] The stirring assembly includes a lower stirring shaft 35 rotatably connected to the axis of the rotary sealing seat 25, and the lower stirring shaft 35 is connected to the transmission guide shaft 29 through a belt;

[0059] The lower stirring shaft 35 and the transmission guide shaft 29 are both provided with pulleys connected to the belts, and the outer wall of the pulleys is rough;

[0060] A group of lower stirring rods 36 are provided on the lower stirring shaft 35 and the rotary sealing seat 25. A group of cleaning spray holes c37 are evenly distributed on the lower stirring rods 36 at the rotary sealing seat 25, the liquid outlet direction of which is directly facing the rotary sealing seat 25 and connected to the liquid filling cavity;

[0061] The driven pressure frame 22 is rotatably connected with an anti-connected bevel gear 38, and the lower stirring shaft 35 is transmission-connected with the rotary sealing seat 25 through the anti-connected bevel gear 38, and the rotation direction of the lower stirring shaft 35 is opposite to that of the rotary sealing seat 25;

[0062] The bottom of the lower stirring shaft 35 and the rotary seal seat 25 are both fixedly mounted with fifth bevel gears, the bevel gear surfaces of the two fifth bevel gears are both transmission-connected with the anti-connected bevel gear 38, and the two fifth bevel gears are symmetrically arranged with the plane where the axis of the anti-connected bevel gear 38 is located as the axis;

[0063] By setting the fifth bevel gear and the anti-connected bevel gear 38, the rotation direction of the lower stirring shaft 35 and the rotary sealing seat 25 are opposite;

[0064] By setting the lower stirring shaft 35 and the rotary sealing seat 25 in opposite directions, the stirring intensity of the two groups of lower stirring rods 36 on the test liquid to be tested is effectively improved, thereby improving the concentration uniformity of the test liquid to be tested, thereby improving the detection accuracy and detection precision of the test result of the test liquid to be tested.

[0065] The flow diversion component includes a first flow channel opened in the flip shaft 24 and opened at both ends, an annular cavity opened in the flip ring 23, and a second flow channel opened in the lower stirring shaft 35. The two ends of the first flow channel are respectively connected to the liquid distribution cavity 17 and the annular cavity. The surface of the annular cavity is connected to a connecting pipe 39. The other end of the connecting pipe 39 is rotatably connected to the second flow channel, and the second flow channel is rotatably connected to the liquid filling cavity.

[0066] The liquid dispensing module includes a liquid dispensing bucket 40 fixed to the inner wall of the carrying arm 4. The lower part of the liquid dispensing bucket 40 and the position corresponding to each test dish mechanism are connected to a diverter valve 32 whose liquid outlet direction is facing the dish cylinder 26. The liquid dispensing bucket 40 is rotatably connected to an upper stirring shaft 41 driven by an upper bevel gear ring 19. A group of upper nozzles 42 and multiple groups of upper stirring rods 43 are fixedly installed on the outer surface of the upper stirring shaft 41 from top to bottom. Cleaning spray holes d44 are evenly opened on the outer wall of the upper stirring rod 43. The upper nozzle 42 and the cleaning spray holes d44 are both supplied with liquid through the liquid distribution cavity 17.

[0067] By setting the upper nozzle 42 and the cleaning nozzle hole d44, the inner wall of the cleaning nozzle hole d44 can be cleaned and self-cleaned;

[0068] The upper part of the indexing frame 5 is rotatably connected with a coupling shaft, and a driven bevel gear connected to the third bevel gear transmission is fixedly installed on the outer periphery of the coupling shaft, and a linkage groove with an opening at the top is fixedly opened inside the coupling shaft, and the inner wall of the upper stirring shaft 41 is slidably matched with the linkage groove, and the cross-sections of the linkage groove and the upper stirring shaft 41 are both regular polygons;

[0069] The upper stirring rod 43 is fixedly provided with a cavity connected to the cleaning spray hole d44 and the upper spray head 42, and the bottom end of the cavity is connected to the liquid distribution cavity 17 through the linkage groove;

[0070] The detection method of the heavy metal detection device for the production of food-grade potassium chloride comprises the following steps:

[0071] SS01. Default: before the test, the food-grade potassium chloride to be tested and the reaction solution are put into the liquid mixing bucket 40 in a quantitative ratio state, and the upper stirring rod 43 mixes the food-grade potassium chloride and the reaction solution to make the concentration uniform. After stirring, each test dish mechanism moves to the bottom of each diverter valve 32;

[0072] SS02, liquid delivery. During liquid delivery, under the driving action of the screw lifting module 2, the carrying arm 4 drives the diverter valve 32 to maintain the set liquid injection distance with the dish cylinder 26. After the liquid injection distance is reached, each diverter valve 32 is opened synchronously and quantitative liquid is injected into each dish cylinder 26 respectively. After the quantitative liquid injection is completed, each diverter valve 32 is closed synchronously;

[0073] SS03, detection, during the detection, a dish cylinder 26 moves to the right below the heavy metal detector 8, after the movement is completed, under the driving action of the screw lifting module 2, the probe body 9 is immersed in the detection liquid to be tested in the dish cylinder 26, after the probe body 9 is immersed, the rotary seal seat 25 and the lower stirring rod 36 continue to work, and the micro-motion push rod 7 drives the probe body 9 to reciprocate and micro-move within the set stroke, when the value of the heavy metal detector 8 is maintained constant, the detection data of the heavy metal detector 8 is recorded, after the detection data is obtained, the probe body 9 is removed from the detection liquid to be detected, after the probe body 9 is removed, the self-cleaning nozzle 13 sprays the cleaning liquid to the probe body 9, after the cleaning liquid sprays for a set time, it is then self-closed, thereafter, the electric heating ring 14 self-dries the probe body 9 within a safe temperature range, after drying, the heavy metal detector 8 is reset to the initial height and initial state;

[0074] SS04, repeat the test, after which the other untested dish cylinder 26 moves to the bottom of the heavy metal detector 8, and repeats the SS03 step, and finally, obtains a plurality of heavy metal test data, after which the plurality of heavy metal test data are obtained, calculates the average of the plurality of heavy metal test data, and then measures the heavy metal content of the food-grade potassium chloride;

[0075] SS05, self-cleaning. After the inspection is completed, each flip ring 23 is synchronously flipped 180°, and the lower end of the dish barrel 26 is directly connected to the waste bucket 3. Under the driving action of the active pressure ring 10 and the screw lifting module 2, the rotary seal seat 25 reciprocates along the inner wall of the dish barrel 26 within the set stroke, and the liquid filling cavity and the water pump continue to discharge liquid, thereby realizing the self-cleaning of the dish barrel 26 and the self-removal of the cleaning residual liquid. After cleaning, the dish barrel 26 is reset to the initial angle and initial state to wait for the next inspection operation.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A heavy metal detection device for the production of food-grade potassium chloride, comprising a frame (1), characterized in that: The frame (1) is provided with a screw lifting module (2), a waste receiving bucket (3) and a liquid storage component; the screw lifting module (2) is provided with a lifting and lowering carrying arm (4); a detection component and a liquid dispensing module are installed in the carrying arm (4); a transmission module is provided above the waste receiving bucket (3); the transmission module is connected to a rotatable transfer frame (5); a group of test dish mechanisms distributed in a circumferential array are provided on the outer periphery of the transfer frame (5); The liquid storage assembly comprises a liquid storage tank (15) fixedly connected to the frame (1), the liquid storage tank (15) supplies liquid to the liquid pump module (11), a water pump is installed at the inner bottom of the liquid storage tank (15), the liquid outlet port of the water pump is fixedly connected to a water pipe (16), a liquid distribution cavity (17) is fixedly opened inside the transfer frame (5), and the liquid outlet port of the water pipe (16) is rotatably connected to the liquid distribution cavity (17); The test dish mechanism comprises a flip ring (23), the inner wall of the flip ring (23) is rotatably connected to a linkage sleeve (28), and the linkage sleeve (28) is transmission-connected to a transmission guide shaft (29); The test dish mechanism comprises a rotary sealing seat (25), a stirring assembly driven by a transmission guide shaft (29) is installed in the rotary sealing seat (25), the stirring assembly comprises a lower stirring shaft (35), and the lower stirring shaft (35) is connected to the transmission guide shaft (29) by a belt; A flow divider assembly is installed in the flip ring (23), and the flow divider assembly is communicated with the liquid filling chamber and the liquid distribution chamber (17) respectively. The test dish mechanism has a flip shaft (24), and the flow divider assembly comprises a first flow channel opened in the flip shaft (24) and having two ends, an annular cavity opened in the flip ring (23), and a second flow channel opened in the lower stirring shaft (35); The test dish mechanism comprises a dish barrel (26), the liquid dispensing module comprises a liquid dispensing bucket (40) fixed to the inner wall of the carrier arm (4), and the lower part of the liquid dispensing bucket (40) and the position corresponding to each test dish mechanism are connected to a diverter valve (32) whose liquid outlet direction faces the dish barrel (26).

2. The heavy metal detection device for producing food-grade potassium chloride according to claim 1, characterized in that: The detection component comprises an inspection platform (6) slidably connected to the carrying arm (4), a horizontally arranged micro-motion push rod (7) is installed between the inspection platform (6) and the carrying arm (4), and a heavy metal detector (8) is arranged inside the inspection platform (6).

3. The heavy metal detection device for producing food-grade potassium chloride according to claim 2, characterized in that: The linkage shaft sleeve (28) is fixedly provided with a shaft groove with two ends opened and slidably connected to the transmission guide shaft (29); the cross-sections of the shaft groove and the transmission guide shaft (29) are both regular polygons.

4. A method for detecting heavy metals used in the production of food-grade potassium chloride, characterized in that: A heavy metal detection device used for the production of food-grade potassium chloride as described in any one of claims 1-3.

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