Nitrite detection workstation

Abstract

The utility model relates to the technical field of sample detection, and provides a nitrite detection workstation which comprises a sample caching device, a sampling device, a mixing device, a transferring device and a visual detection device, the sample caching device is used for temporarily storing centrifugal tubes filled with samples; the sampling device is used for respectively sampling a sample and a detection reagent and sequentially adding the sampled sample and the detection reagent into the test tubes on the uniform mixing device; the uniform mixing device is used for uniformly shaking the test tubes; the transferring device is used for transferring the uniformly shaken test tubes to the visual detection device; the visual detection device is used for performing visual detection on the liquid in the test tube so as to judge whether the nitrite content in the sample is qualified or not. According to the nitrite detection workstation, manual operation is not needed, whether the whole nitrite content is qualified or not is automatically detected, a large amount of automatic detection can be carried out, the detection efficiency is high, the detection precision is high, and the safety of operators is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sample detection, in particular to a nitrite detection workstation. Background Art

[0002] Nitrite is a common chemical substance and is used as an additive in the processing and preservation of food. However, excessive intake of nitrite can cause poisoning. Therefore, nitrite detection is an important link to ensure food safety and drinking water quality, and helps to ensure food quality.

[0003] Currently, laboratories usually use manual methods to detect the content of nitrite. The operator manually shakes the sample and performs pipetting, then adds the detection reagent and reads the result. A large amount of repetitive work takes up a lot of time of the operator, and it is difficult to ensure that the sample is not spilled during manual pipetting and liquid addition. There is a slight acidic hazard to the human body when taking the sample. Summary of the Utility Model

[0004] The utility model provides a nitrite detection workstation to solve the problems in the prior art that the workload of manual nitrite detection is large and it is difficult to ensure the accuracy of sample detection.

[0005] The utility model provides a nitrite detection workstation, including: a sample buffer device, a sampling device, a mixing device, a transfer device, and a vision detection device;

[0006] The sample buffer device is used to temporarily store the centrifuge tube containing the sample;

[0007] The sampling device is used to respectively take samples of the sample and the detection reagent, and sequentially add the sampled sample and the detection reagent into the test tube on the mixing device;

[0008] The mixing device is used to shake the test tube; the transfer device is used to transfer the shaken test tube to the vision detection device;

[0009] The vision detection device is used to perform vision detection on the liquid in the test tube to judge whether the nitrite content in the sample is qualified.

[0010] According to a nitrite detection workstation provided by the utility model, the sampling device includes a bracket, a robotic arm, a first sampling component, and a second sampling component;

[0011] The robotic arm is installed on the bracket, the first sampling component and the second sampling component are arranged at the execution end of the robotic arm, the first sampling component is used to suck the sample from the centrifuge tube and drop the sample into the test tube, and the second sampling component is used to drop the detection reagent into the test tube.

[0012] According to a nitrite detection workstation provided by the present utility model, the first sampling assembly includes: a first sampling needle, a first injection pump, and a first pipeline, and the second sampling assembly includes a second sampling needle, a second injection pump, and a second pipeline;

[0013] The first sampling needle is communicated with the first injection pump through the first pipeline, and the second sampling needle is communicated with the second injection pump through the second pipeline.

[0014] According to a nitrite detection workstation provided by the present utility model, the robotic arm includes a first linear module, a second linear module, a first driving member, and a second driving member;

[0015] The slide of the first linear module is connected to the second linear module, the slide of the second linear module is connected to the first driving member and the second driving member, the first driving member is connected to the first sampling needle, and the second driving member is connected to the second sampling needle;

[0016] The first linear module is used to drive the second linear module to move along the length direction of the bracket, the second linear module is used to drive the first driving member and the second driving member to move along the width direction of the bracket, the first driving member is used to drive the first sampling needle to move along the height direction of the bracket, and the second driving member is used to drive the second sampling needle to move along the height direction of the bracket.

[0017] According to a nitrite detection workstation provided by the present utility model, the sample caching device includes a bracket, a first cleaning and drying member, and a second cleaning and drying member;

[0018] The bracket has a first hole, a second hole, and a third hole. The first hole is used to accommodate the centrifuge tube, the second hole is used to accommodate the first cleaning and drying member, the first cleaning and drying member is used to clean and dry the first sampling needle, the third hole is used to accommodate the second cleaning and drying member, and the second cleaning and drying member is used to clean and dry the second sampling needle.

[0019] According to a nitrite detection workstation provided by the present utility model, at least one of the first cleaning and drying member and the second cleaning and drying member includes a body and a discharge port;

[0020] The body has an inner cavity, and the discharge ports are respectively communicated with the inner cavity, and the discharge ports are used to introduce a gas source or a water source.

[0021] According to a nitrite detection workstation provided by the present utility model, the mixing device includes: a test tube rack, a slide rail, and a third driving member;

[0022] The test tube rack is used to accommodate the test tubes. The test tube rack is movably arranged on the slide rail, and the third driving member is in transmission connection with the test tube rack to drive the test tube rack to reciprocate and shake the liquid in the test tubes.

[0023] A nitrite detection workstation provided by the present utility model, the mixing device further includes: a transmission assembly;

[0024] The transmission assembly includes: a rotating block, a connecting rod and a support;

[0025] The support is arranged on the test tube rack. One end of the connecting rod is rotatably connected to the support, the other end of the connecting rod is rotatably connected to the rotating block, and the rotating block is connected to the output end of the third driving member.

[0026] A nitrite detection workstation provided by the present utility model, the visual recognition device includes a color mark sensor;

[0027] The color mark sensor is used to identify the color of the liquid in the test tubes.

[0028] A nitrite detection workstation provided by the present utility model further includes: a detection reagent bottle and a cooling box;

[0029] The detection reagent bottle is used to hold the detection reagent. The cooling box has a cooling chamber, and the detection reagent bottle is accommodated in the cooling chamber.

[0030] The nitrite detection workstation provided by the present utility model, by setting a sample caching device, a sampling device, a mixing device, a transfer device and a visual detection device, and sampling from the centrifuge tubes of the sample caching device by the sampling device and adding it into the test tubes, the sampling device also adds the detection reagent into the test tubes, the mixing device shakes the liquid in the test tubes, and visually detects the liquid in the test tubes through the visual detection device, and also judges whether the nitrite content of the liquid in the test tubes is qualified. Without manual operation, it automatically realizes the detection of whether the whole nitrite content is qualified, can perform a large number of automatic detections, has high detection efficiency, high detection accuracy, and ensures the safety of operators. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1It is a three-dimensional structure diagram of the nitrite detection workstation provided by the present utility model.

[0033] Figure 2 It is a top view structure diagram of the nitrite detection workstation provided by the present utility model.

[0034] Figure 3 It is a three-dimensional structure diagram of the sampling device provided by the present utility model.

[0035] Figure 4 It is a three-dimensional structure diagram of the sample caching device provided by the present utility model.

[0036] Figure 5 It is a three-dimensional structure diagram of the mixing device provided by the present utility model.

[0037] Reference numerals:

[0038] 1. Sample caching device; 11. Centrifuge tube; 12. Bracket; 13. First cleaning and drying member; 14. Second cleaning and drying member; 121. First hole position; 122. Second hole position; 123. Third hole position; 124. Fourth hole position; 131. Body; 132. Discharge port;

[0039] 2. Sampling device; 21. Support; 22. Robot arm; 23. First sampling assembly; 24. Second sampling assembly; 221. First linear module; 222. Second linear module; 223. First driving member; 224. Second driving member;

[0040] 3. Mixing device; 31. Test tube; 32. Test tube rack; 33. Slide rail; 34. Third driving member; 35. Transmission assembly; 351. Rotating block; 352. Connecting rod; 353. Support;

[0041] 4. Visual detection device; 5. Detection reagent bottle; 6. Cooling box. Detailed implementation manners

[0042] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0043] Below in conjunction with Figures 1 - 5 , the nitrite detection workstation provided by the embodiments of the present utility model will be described in detail through specific embodiments and their application scenarios.

[0044] In some embodiments, such asFigure 1 and Figure 4 As shown in Figure 4 , this embodiment provides a nitrite detection workstation, including: a sample caching device 1, a sampling device 2, a mixing device 3, a transfer device, and a vision detection device 4.

[0045] The sample caching device 1 is used to temporarily store the centrifuge tube 11 containing the sample.

[0046] The sampling device 2 is used to respectively sample the sample and the detection reagent, and sequentially add the sampled sample and detection reagent into the test tube 31 on the mixing device 3.

[0047] The mixing device 3 is used to shake the test tube 31; the transfer device is used to transfer the shaken test tube 31 to the vision detection device 4.

[0048] The vision detection device 4 is used to visually detect the liquid in the test tube 31 to determine whether the nitrite content in the sample is qualified.

[0049] It can be understood that in order to detect the nitrite content in the sample, a detection reagent is added to the sample and detected by colorimetry, that is, whether the nitrite in the liquid exceeds the standard is judged by the change in color.

[0050] The sample caching device 1 is used to cache the centrifuge tube 11 containing the sample. Optionally, the sample caching device 1 can cache multiple centrifuge tubes 11 to increase the sample supply capacity and facilitate large-scale tests.

[0051] The mixing device 3 is used to accommodate the test tube 31 and shake the test tube 31. Optionally, the mixing device 3 can accommodate multiple test tubes 31 and shake multiple test tubes 31 simultaneously. Specifically, the mixing device 3 can use an oscillation device to oscillate the test tube 31 to mix the sample and the detection reagent in the test tube 31 evenly.

[0052] The sampling device 2 can automatically quantitatively sample the sample and the detection reagent, and respectively add the sample and the detection reagent into the test tube 31. Specifically, the sampling device 2 can be configured with a measuring spoon or a burette tube for accurate volume sampling operations.

[0053] The vision detection device 4 identifies the color of the liquid in the test tube 31 and compares it with the standard color. Whether the nitrite content of the liquid in the test tube 31 is qualified is judged by color. If it is qualified, the transfer device pours the liquid in the test tube 31 into the waste liquid bucket. If it is unqualified, manual intervention is required to trace the unqualified sample for corresponding treatment.

[0054] The centrifuge tube 11 containing the sample is transferred from the previous work position to the sample buffer device 1 by the transfer device. The sampling device 2 samples from the centrifuge tube 11 and adds the obtained sample to the test tube 31. The sampling device 2 also adds the detection time to the test tube 31. The sample and the detection reagent are mixed in the test tube 31. The mixing device 3 shakes the liquid in the test tube 31. The transfer device transfers the shaken test tube 31 to the visual inspection device 4. The visual inspection device 4 determines whether the nitrite content of the liquid in the test tube 31 is qualified by identifying and comparing the color in the test tube 31.

[0055] The nitrite detection workstation provided by the present utility model sets up a sample buffer device 1, a sampling device 2, a mixing device 3, a transfer device and a visual inspection device 4. The sampling device 2 samples from the centrifuge tube 11 of the sample buffer device 1 and adds it to the test tube 31. The sampling device 2 also adds the detection reagent to the test tube 31. The mixing device 3 shakes the liquid in the test tube 31, and the visual inspection device 4 visually inspects the liquid in the test tube 31 to determine whether the nitrite content of the liquid in the test tube 31 is qualified. It can automatically detect whether the nitrite content is qualified without manual operation, can perform a large number of automatic detections, has high detection efficiency and high detection accuracy, and ensures the safety of operators.

[0056] In some embodiments, as Figure 1 and Figure 3 shown, the sampling device 2 of this embodiment includes a bracket 21, a robotic arm 22, a first sampling assembly 23 and a second sampling assembly 24.

[0057] The robotic arm 22 is installed on the bracket 21. The first sampling assembly 23 and the second sampling assembly 24 are arranged at the execution end of the robotic arm 22. The first sampling assembly 23 is used to suck the sample from the centrifuge tube 11 and drop the sample into the test tube 31. The second sampling assembly 24 is used to drop the detection reagent into the test tube 31.

[0058] It can be understood that the bracket 21 provides an installation support for the robotic arm 22. The bracket 21 is arranged in a cuboid shape. The sample buffer device 1 and the mixing device 3 can also be installed on the bracket 21 to achieve a compact setting of the nitrite detection workstation.

[0059] The robotic arm 22 of this embodiment can drive the first sampling assembly 23 and the second sampling assembly 24 to reciprocate between the sample buffer device 1 and the mixing device 3 to complete the work of sucking the sample, adding the sample, and adding the detection reagent.

[0060] Specifically, the robotic arm 22 can adopt a setting structure of multiple articulated arms, and the relative movement of each articulated arm is used to control the movement of the positions of the first sampling assembly 23 and the second sampling assembly 24.

[0061] In this embodiment, by providing a robotic arm 22, a first sampling assembly 23, and a second sampling assembly 24 in the sampling device 2, the positions of the first sampling assembly 23 and the second sampling assembly 24 are moved by the robotic arm 22, and the addition of the sample and the detection reagent into the test tube 31 is completed through the suction and addition of the sample by the first sampling assembly 23 and the addition of the detection reagent by the second sampling assembly 24, which improves the automation level of the sampling device 2 and the sampling efficiency.

[0062] In some embodiments, as Figure 3 shown, the first sampling assembly 23 of this embodiment includes: a first sampling needle, a first syringe pump, and a first pipeline, and the second sampling assembly 24 includes a second sampling needle, a second syringe pump, and a second pipeline.

[0063] The first sampling needle is connected to the first syringe pump through the first pipeline, and the second sampling needle is connected to the second syringe pump through the second pipeline.

[0064] It can be understood that the first syringe pump is used to control the first sampling needle to aspirate a quantitative sample from the centrifuge tube 11 and control the first sampling needle to drop the aspirated sample into the test tube 31. The first syringe pump provides suction force and pumping force for the first sampling needle. The second syringe pump is used to control the second sampling needle to deliver the detection reagent through the second pipeline and control the second sampling needle to quantitatively drop the delivered detection reagent into the test tube 31.

[0065] Since the first syringe pump and the second syringe pump can accurately, uniformly, and continuously deliver liquids, the first syringe pump can control the first sampling needle to accurately aspirate and drop the sample, and the second syringe pump can control the second sampling needle to accurately add the detection reagent. The addition time and flow rate can both be automatically controlled, improving the accuracy and reliability of the addition of the sample and the detection reagent.

[0066] In some examples, the volume of the centrifuge tube 11 is 50 ml. The sampling device 2 obtains 2 ml of the sample from the centrifuge tube 11 and adds it to the test tube 31. The sampling device 2 also adds 1 ml of the detection reagent to the test tube 31.

[0067] In some embodiments, as Figure 3 shown, the robotic arm 22 of this embodiment includes a first linear module 221, a second linear module 222, a first driving member 223, and a second driving member 224.

[0068] The slide of the first linear module 221 is connected to the second linear module 222. The slide of the second linear module 222 is connected to the first driving member 223 and the second driving member 224. The first driving member 223 is connected to the first sampling needle, and the second driving member 224 is connected to the second sampling needle.

[0069] The first linear module 221 is used to drive the second linear module 222 to move along the length direction of the bracket 21. The second linear module 222 is used to drive the first driving member 223 and the second driving member 224 to move along the width direction of the bracket 21. The first driving member 223 is used to drive the first sampling needle to move along the height direction of the bracket 21. The second driving member 224 is used to drive the second sampling needle to move along the height direction of the bracket 21.

[0070] It can be understood that the first linear module 221 is used to move the first sampling needle and the second sampling needle along the length direction of the bracket 21, so that the first sampling needle and the second sampling needle can reciprocate between the sample buffer device 1 and the mixing device 3. The second linear module 222 is used to move the first sampling needle and the second sampling needle along the width direction of the bracket 21 to adjust the relative positions of the first sampling needle, the second sampling needle, the centrifuge tube 11 and the test tube 31. The first driving member 223 is used to drive the first sampling needle to expand and contract along the height direction of the bracket 21 to adjust the relative height of the first sampling needle with respect to the centrifuge tube 11 and the test tube 31. The second driving member 224 is used to drive the second sampling needle to expand and contract along the height direction of the bracket 21 to adjust the relative height of the second sampling needle with respect to the test tube 31. It should be noted that the movement of the first sampling needle and the second sampling needle in the length and width directions of the bracket 21 is synchronous, and they move independently in the height direction of the bracket 21.

[0071] Among them, the first linear module 221 and the second linear module 222 can be any one of a synchronous belt type, a ball screw type, and a linear motor type. The first driving member 223 and the second driving member 224 can be any one of an electric push rod, a linear motor, and a cylinder.

[0072] In this embodiment, by providing the first linear module 221, the second linear module 222, the first driving member 223 and the second driving member 224 on the robotic arm 22, the first module is used to control the movement of the first sampling needle and the second sampling needle along the length direction of the bracket 21, the second linear module 222 is used to control the movement of the first sampling needle and the second sampling needle along the width direction of the bracket 21, the first driving member 223 is used to control the movement of the first sampling needle along the height direction of the bracket 21, and the second driving member 224 is used to control the movement of the second sampling needle along the height direction of the bracket 21. Thus, automatic control of the movement of the first sampling needle and the second sampling needle in the three directions of length, width, and height of the bracket 21 is achieved, the accuracy of the positions of the first sampling needle and the second sampling needle is improved, and the degree of automation is increased.

[0073] In some embodiments, as Figure 4 shown, the sample buffer device 1 of this embodiment includes a bracket 12, a first cleaning and drying member 13, and a second cleaning and drying member 14.

[0074] The bracket 12 is provided with a first hole position 121, a second hole position 122 and a third hole position 123. The first hole position 121 is used to accommodate the centrifuge tube 11, the second hole position 122 is used to accommodate the first cleaning and drying member 13, the first cleaning and drying member 13 is used to clean and dry the first sampling needle, the third hole position 123 is used to accommodate the second cleaning and drying member 14, and the second cleaning and drying member 14 is used to clean and dry the second sampling needle.

[0075] It can be understood that when the first sampling needle samples the sample and the second sampling needle samples the detection reagent, for sampling different samples, the first sampling needle needs to be cleaned and dried to avoid sample contamination and affect the detection accuracy of the sample. Moreover, after the first sampling needle and the second sampling needle are repaired, installed, disassembled, the first sampling needle and the second sampling needle also need to be cleaned and dried to keep the surfaces of the first sampling needle and the second sampling needle clean.

[0076] The first hole position 121 is used to accommodate the centrifuge tube 11. In this embodiment, there are two first hole positions 121, and each first hole position 121 accommodates one centrifuge tube 11, with a total of two centrifuge tubes 11 accommodated, and the samples in the two centrifuge tubes 11 are batch-detected, improving the efficiency of sample detection.

[0077] The first cleaning and drying member 13 is used to clean and dry the first sampling needle, and the second cleaning and drying member 14 is used to clean and dry the second sampling needle. Since the second hole position 122 and the third hole position 123 are arranged at the rear side of the first hole position 121, in this embodiment, the switching between the sampling and the cleaning and drying operations of the first sampling needle and the second sampling needle can be completed by moving the positions of the first sampling needle and the second sampling needle back and forth. The structure is compact and the operation paths of the first sampling needle and the second sampling needle are short, which is more conducive to automatic control.

[0078] In the sample caching device 1 of this embodiment, by arranging the first hole position 121 on the bracket 12 to accommodate the centrifuge tube 11, the second hole position 122 to accommodate the first cleaning and drying member 13, and the third hole position 123 to accommodate the second cleaning and drying member 14, the dual functions of sample caching processing and cleaning and drying of the first sampling needle and the second sampling needle are realized on the sample caching device 1, and the structure is compact.

[0079] In some embodiments, as Figure 4 shown, at least one of the first cleaning and drying member 13 and the second cleaning and drying member 14 of this embodiment includes a main body 131 and a discharge port 132.

[0080] The main body 131 has an inner cavity, and the discharge ports 132 are respectively communicated with the inner cavity, and the discharge ports 132 are used to introduce a gas source or a water source.

[0081] It can be understood that the inner chamber of the main body 131 is used for the insertion of the first sampling needle and the second sampling needle. After the first sampling needle and the second sampling needle are inserted into the top of the inner chamber, the water source is passed into the inner chamber through the discharge port 132 to flush the first sampling needle and the second sampling needle. The waste liquid after flushing falls along the inner chamber and is discharged through the liquid collecting pipeline connected to the bottom of the inner chamber. Then, the air source is passed into the inner chamber through the discharge port 132 to dry the first sampling needle and the second sampling needle.

[0082] Optionally, the discharge port 132 of this embodiment is provided with two, the main body 131 is a columnar structure, and the two discharge ports 132 are arranged opposite to each other along the radial direction of the main body 131. The water source and the air source can flush and dry the first sampling needle and the second sampling needle through the two discharge ports 132. The flushing and drying area is larger, the flushing and drying efficiency is better, and the flushing and drying effect is better.

[0083] In this embodiment, a main body 131 and a discharge port 132 are arranged on the first cleaning and drying member 13 and the second cleaning and drying member 14, and a water source and an air source are introduced through the discharge port 132 to rinse and dry the first sampling needle and the second sampling needle. The structure is simple and easy to implement, and the cleaning and drying effects are good.

[0084] In some embodiments, Figure 1 and Figure 5 As shown, the mixing device 3 of this embodiment includes: a test tube 31 rack, a slide rail 33 and a third driving member 34.

[0085] The test tube rack 31 is used to accommodate the test tubes 31 . The test tube rack 31 is movably disposed on the slide rail 33 . The third driving member 34 is drivingly connected to the test tube rack 31 to drive the test tube rack 31 to reciprocate to shake the liquid in the test tube 31 .

[0086] It is understandable that the test tube rack 31 of this embodiment is arranged in a square shape, consisting of several layers of cross frames, one layer of bottom frame and support bars arranged at four vertices, and the cross frames are provided with several through holes for the test tubes 31 to pass through and be supported on the bottom frame.

[0087] The slide rail 33 is installed on the bracket 21, and a slide groove is provided at the bottom of the base frame. The movement of the slide groove and the slide rail 33 realizes the movement of the test tube rack 31 relative to the slide rail 33. The third driving member 34 drives the test tube rack 31 to move back and forth along the slide rail 33, so that the liquid in the test tube 31 in the test tube rack 31 is repeatedly shaken, thereby achieving the shaking treatment of the liquid in the test tube 31.

[0088] The slide rail 33 in this embodiment is arranged along the width direction of the bracket 21 so that the test tube 31 rack will not collide with the sample buffer device 1 when reciprocating.

[0089] Specifically, the third driving member 34 may be a servo motor.

[0090] In this embodiment, the third driving member 34 drives the test tube rack 31 to reciprocate along the slide rail 33, so that the liquid in the test tube 31 is fully shaken during the reciprocating shaking. Compared with manual shaking, the shaking method of this embodiment can be automatically realized and a large number of repeated operations can be carried out, improving the shaking efficiency and ensuring the shaking effect.

[0091] In some embodiments, as Figure 5 shown, the mixing device 3 of this embodiment further includes: a transmission assembly 35.

[0092] The transmission assembly 35 includes: a rotating block 351, a connecting rod 352 and a support 353.

[0093] The support 353 is arranged on the test tube rack 31. One end of the connecting rod 352 is rotatably connected to the support 353, the other end of the connecting rod 352 is rotatably connected to the rotating block 351, and the rotating block 351 is connected to the output end of the third driving member 34.

[0094] It can be understood that the support 353 of this embodiment is arranged on the upper side of the chassis. One end of the connecting rod 352 is rotatably connected to the support 353 through a spherical plain bearing, and the other end of the connecting rod 352 is also rotatably connected to the rotating block 351 through a spherical plain bearing.

[0095] When the test tube rack 31 is shaken, the third driving member 34 drives the rotating block 351 to rotate. Since the connection position of the rotating block 351 and the third driving member 34 is eccentrically arranged with respect to the center of the rotating block 351, during the rotation of the rotating member, the distance from the test tube rack 31 changes. Therefore, the relative position between the connecting rod 352 and the test tube rack 31 changes, enabling the connecting rod 352 to exert a dragging force on the support 353, so that the third driving member 34 can drive the test tube rack 31 to reciprocate along the slide rail 33. Through the settings of the rotating block 351 and the connecting rod 352, the rotational motion of the third driving member 34 is converted into the linear motion of the support 353, realizing the transmission function through a simple structure and having high transmission efficiency.

[0096] In some embodiments, as Figure 1 shown, the visual recognition device of this embodiment includes a color mark sensor.

[0097] The color mark sensor is used to identify the color of the liquid in the test tube 31.

[0098] It can be understood that the color mark sensor is a sensor that uses the optical principle to detect a specific color. By emitting light and receiving the reflected light, and then judging whether the color of the target object meets the preset standard according to the light intensity and color information.

[0099] The color label sensor in this embodiment emits light to the liquid in the test tube 31 and receives the reflected light, and determines whether the nitrite content in the liquid is within the qualified range according to the light intensity and color information. In this embodiment, a controller is provided, and the color label sensor feeds back the detection information to the controller.

[0100] By setting the color label sensor in this embodiment, the automatic recognition of the color of the liquid in the test tube 31 can be realized, reducing the visual fatigue and errors of the operator repeatedly checking the color of the liquid in the test tube 31, and improving the detection efficiency.

[0101] In some embodiments, such as Figure 1 and Figure 2 shown, this embodiment further includes: a detection reagent bottle 5 and a cooling box 6.

[0102] The detection reagent bottle 5 is used to hold the detection reagent. The cooling box 6 has a cooling chamber, and the detection reagent bottle 5 is placed in the cooling chamber.

[0103] It can be understood that the detection reagent bottle 5 of this embodiment is arranged at the rear side of the sampling device 2. The detection reagent bottle 5 is communicated with the second pipeline. Based on the pumping of the second injection pump, the detection reagent in the detection reagent bottle 5 is transported into the second sampling needle and dripped into the test tube 31 to realize the continuous and timed addition of the detection reagent.

[0104] Since the detection reagent usually needs to be stored under specific temperature conditions to maintain its stability and effectiveness, this embodiment uses the cooling box 6 to maintain the detection reagent in a suitable low-temperature environment, preventing the deterioration, reduced activity or microbial contamination of the detection reagent caused by the change of the environmental temperature, thereby reducing the risk of the detection reagent being contaminated and ensuring the accuracy and reliability of the nitrite detection.

[0105] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A nitrite detection workstation, characterized in that, Including: A sample caching device, a sampling device, a mixing device, a transfer device, and a visual inspection device; The sample caching device is used for temporarily storing centrifuge tubes containing samples; The sampling device is used for sampling the sample and the detection reagent respectively, and sequentially adding the sampled sample and the detection reagent into the test tube on the mixing device; The mixing device is used for shaking the test tube; The transfer device is used for transferring the shaken test tube to the visual inspection device; The visual inspection device is used for visually inspecting the liquid in the test tube to determine whether the nitrite content in the sample is qualified.

2. The nitrite detection workstation according to claim 1, wherein, The sampling device includes a bracket, a robotic arm, a first sampling component, and a second sampling component; The robotic arm is installed on the bracket, the first sampling component and the second sampling component are arranged at the execution end of the robotic arm, the first sampling component is used for sucking the sample from the centrifuge tube and dropping the sample into the test tube, and the second sampling component is used for dropping the detection reagent into the test tube.

3. The nitrite detection workstation according to claim 2, wherein The first sampling component includes: a first sampling needle, a first syringe pump, and a first pipeline, and the second sampling component includes a second sampling needle, a second syringe pump, and a second pipeline; The first sampling needle is communicated with the first syringe pump through the first pipeline, and the second sampling needle is communicated with the second syringe pump through the second pipeline.

4. The nitrite detection workstation according to claim 3, characterized in that, The robotic arm includes a first linear module, a second linear module, a first driving member, and a second driving member; The slide of the first linear module is connected to the second linear module, the slide of the second linear module is connected to the first driving member and the second driving member, the first driving member is connected to the first sampling needle, and the second driving member is connected to the second sampling needle; The first linear module is used for driving the second linear module to move along the length direction of the bracket, the second linear module is used for driving the first driving member and the second driving member to move along the width direction of the bracket, the first driving member is used for driving the first sampling needle to move along the height direction of the bracket, and the second driving member is used for driving the second sampling needle to move along the height direction of the bracket.

5. The nitrite detection workstation according to claim 3, characterized in that, The sample caching device includes a bracket, a first cleaning and drying member, and a second cleaning and drying member; The bracket has a first hole position, a second hole position, and a third hole position. The first hole position is used for accommodating the centrifuge tube, the second hole position is used for accommodating the first cleaning and drying member, the first cleaning and drying member is used for cleaning and drying the first sampling needle, the third hole position is used for accommodating the second cleaning and drying member, and the second cleaning and drying member is used for cleaning and drying the second sampling needle.

6. The nitrite detection workstation according to claim 5, wherein At least one of the first cleaning and drying member and the second cleaning and drying member includes a body and a discharge port; The body has an inner cavity, the discharge ports are respectively communicated with the inner cavity, and the discharge ports are used for introducing a gas source or a water source.

7. The nitrite detection workstation according to claim 1, characterized in that, The mixing device includes: a test tube rack, a slide rail, and a third driving member; The test tube rack is used to accommodate the test tubes. The test tube rack is movably arranged on the slide rail, and the third driving member is in transmission connection with the test tube rack to drive the test tube rack to reciprocate so as to shake the liquid in the test tubes evenly.

8. The nitrite detection workstation according to claim 7, characterized in that, The mixing device further includes: a transmission assembly; The transmission assembly includes: a rotating block, a connecting rod and a support; The support is arranged on the test tube rack. One end of the connecting rod is rotatably connected to the support, the other end of the connecting rod is rotatably connected to the rotating block, and the rotating block is connected to the output end of the third driving member.

9. The nitrite detection workstation according to claim 1, wherein, The visual detection device includes a color code sensor; The color code sensor is used to identify the color of the liquid in the test tubes.

10. The nitrite detection workstation according to claim 1, characterized in that, It further includes: a detection reagent bottle and a cooling box; The detection reagent bottle is used to hold the detection reagent. The cooling box has a cooling chamber, and the detection reagent bottle is accommodated in the cooling chamber.

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