Automatic reagent card conveying and detecting device

Abstract

The utility model discloses an automatic reagent card conveying and detecting device, which relates to the technical field of medical detection modules and comprises a base, an incubation module and a detection module, the incubation module and the detection module are respectively arranged on the base along the transverse direction and the longitudinal direction, and the output end of the incubation module is butted with the starting end of the detection module; the top of the sliding block set is slidably arranged on the transverse rail groove in a sleeving mode, reagent cards are sequentially arranged in the transverse rail groove, and the developing solution filling opening is formed in the upper portion of the transverse rail groove. A heating plate is fixed to the bottom of the starting end of the transverse rail groove. The longitudinal sliding block can slide on the longitudinal rail groove in a reciprocating mode, hook claws are symmetrically arranged at the bottom of the longitudinal sliding block, the two hook claws are located on the front side and the rear side of the reagent card respectively, and guide grooves for driving the reagent card to displace are formed in the hook claws. The manual operation is greatly reduced, and the overall working efficiency and the detection accuracy are effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of medical testing module technology, specifically relating to an automatic reagent card delivery and testing device. Background Technology

[0002] Currently, many analyzers and testing devices on the market require the addition of a chromogenic solution to the sample wells of a reagent card for GRB (Green, Red, Blue) detection. This detection method is mainly used to identify and quantify specific chemical substances on the reagent card, such as antigens or antibodies, visualizing the test results through a colorimetric reaction. That is, by adding a chromogenic solution to the sample well, the test results are visually displayed in the form of color changes, facilitating quick identification and judgment by the operator. The specific chemical substance in the chromogenic solution binds to the target on the reagent card, producing a color change. This change can be accurately measured by the GRB detection module. Through GRB detection, the intensity of the color can be quantitatively analyzed, thereby estimating the concentration or presence of the target substance.

[0003] However, with the development of technology, especially in fields such as biomedicine, the requirements for experimental automation and detection efficiency are becoming increasingly stringent. Traditional manual methods require manual addition of chromogenic solution to each reagent card before transporting it to the detection module for each test. While feasible for small-scale experiments, these methods become particularly inefficient, error-prone, and inconsistent when processing large numbers of samples. These problems limit the scale of experiments and detections, affect the accuracy and reliability of results, and increase experimental uncertainty. Utility Model Content

[0004] The purpose of this invention is to provide an automatic reagent card delivery and testing device to solve the problems of tediousness and error caused by traditional manual operation, and to solve the problems of automatic addition of colorimetric solution, incubation and queuing of reagent cards. It can automatically complete a series of operations such as placement, incubation, delivery, injection, testing and removal of reagent cards, greatly reducing manual intervention, lowering labor costs and human error, and improving overall work efficiency and testing accuracy.

[0005] The solution adopted by this utility model to solve its technical problem is: an automatic reagent card delivery and detection device, including a base, an incubation module and a detection module, wherein the incubation module and the detection module are respectively arranged on the base in the horizontal and vertical directions, and the output end of the incubation module is connected to the starting end of the detection module.

[0006] The incubation module includes a sample loading mechanism and a liquid injection mechanism. The sample loading mechanism includes a slider assembly and a transverse track groove on the base. The bottom of the slider assembly is connected to a transverse power component, and the top of the slider assembly is slidably mounted on the transverse track groove. Reagent cards are arranged sequentially in the transverse track groove. The colorimetric liquid injection port of the liquid injection mechanism is located above the reagent cards in the transverse track groove. A heating plate is fixed at the bottom of the starting end of the transverse track groove, and the end of the transverse track groove is connected to the starting end of the detection module.

[0007] The detection module includes a longitudinal slider and a detection module. The longitudinal slider slides back and forth on the longitudinal track groove via a longitudinal power component. The bottom of the longitudinal slider is symmetrically equipped with claws. The two claws are located on the front and rear sides of the reagent card, respectively, and each claw has a guide groove to drive the reagent card to move. The detection module is located above the claws, and a sample drop port is opened on the base at the end of the longitudinal track groove.

[0008] As a preferred technical solution of this utility model, the transverse power component includes a sample loading drive motor, and transverse active pulleys and transverse driven pulleys arranged transversely at intervals. The transverse active pulley is mounted on the output shaft of the sample loading drive motor, and the transverse driven pulley is fixedly mounted on the bottom of the base top frame through a pulley seat. An annular transverse synchronous belt is fitted on the transverse active pulley and the transverse driven pulley. The bottom of the first transverse paddle is fixedly connected to the transverse synchronous belt by bolts.

[0009] As a preferred technical solution of this utility model, the slider assembly includes a first transverse paddle and a second transverse paddle. The bottom of the first transverse paddle is fixedly connected to a transverse synchronous belt, and the second transverse paddle is elastically connected to the bottom of the base top frame by a tension spring and a bolt.

[0010] As a preferred technical solution of this utility model, the longitudinal power component includes a push motor and longitudinally moving active pulleys and longitudinally moving driven pulleys arranged at intervals along the longitudinal direction. The push motor is fixedly mounted on the base, and the longitudinally moving active pulley is connected to the output shaft of the push motor. The longitudinally moving driven pulley is fixedly mounted on the top surface of the top frame through a pulley seat, and an annular longitudinal synchronous belt is fitted on the longitudinally moving active pulley and the longitudinally moving driven pulley.

[0011] As a preferred technical solution of this utility model, the liquid injection mechanism includes a liquid storage tank, a liquid injection pump, and a colorimetric liquid injection port. The liquid injection pump and the liquid storage tank are both fixedly installed in the base. The liquid injection pump is connected to the liquid storage tank. The output end of the liquid storage tank is connected to the colorimetric liquid injection port through a liquid delivery pipe. The colorimetric liquid injection port is fixedly installed on the base by a bracket, and the colorimetric liquid injection port is located above the reagent card in the transverse track groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The new automatic reagent card delivery and testing device effectively solves problems such as automatic delivery and dispensing of colorimetric solution, incubation and queuing of reagent cards, and reagent card displacement, thus effectively improving the detection efficiency and accuracy of reagent cards. It has the following advantages:

[0014] (1) High degree of automation: The device realizes the automatic sample loading, transportation, liquid injection, detection and sample dropping of reagent cards through motor drive and synchronous belt transmission, which greatly reduces manual operation and improves work efficiency;

[0015] (2) High precision: The sample loading mechanism uses a combination of slides, sliders and synchronous belts to ensure the stability and accuracy of the reagent card during movement, ensuring that the reagent card can be accurately placed in the designated position and improving the reliability of the test;

[0016] (3) High efficiency: The device adopts a cyclic working mode, which can continuously process reagent cards, thus improving the efficiency of the entire workflow;

[0017] (4) Space saving: The device has a compact structure, can make full use of space, and has strong practicality;

[0018] (5) Reduce labor costs: Due to the automation of operations, human intervention is reduced, thereby reducing labor costs. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention with an outer shell;

[0021] Figure 3 This is a top view of the structure of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the reagent card of this utility model;

[0023] Figure 5 This is one of the three-dimensional structural schematic diagrams of the sample loading mechanism of this utility model;

[0024] Figure 6 This is the second three-dimensional structural schematic diagram of the sample loading mechanism of this utility model;

[0025] Figure 7 This is a three-dimensional structural diagram of the pushing mechanism of this utility model;

[0026] Figure 8 This is a three-dimensional structural diagram of the hook claw of this utility model;

[0027] Figure 9 This is a schematic diagram of the structure of this utility model in different working states.

[0028] In the diagram: 1. Outer shell; 2. Base; 201. Top plate; 202. Base; 3. Liquid injection mechanism; 301. Storage tank; 302. Liquid injection pump; 303. Colorimetric reagent filling port; 4. Sample loading mechanism; 401. Transverse track groove; 402. Sample placement seat; 403. Sample placement groove; 404. Sample loading drive motor; 405. First transverse lever; 406. Second transverse lever; 407. Transverse driving pulley; 408. Transverse driven pulley; 409. Transverse synchronous belt; 410. Heating plate; 411. Transverse slide rail; 5. Pushing mechanism; 501. Pushing motor; 502. Longitudinal slide rail 503. Rail; 5034. Longitudinal slider; 5035. End plate; 5036. Inclined plate; 5037. Hook; 5038. Guide groove; 5039. Mounting hole; 5030. Top spring; 5031. Top rod; 5032. Arc-shaped end face; 5033. Longitudinal synchronous belt; 504. Longitudinal drive pulley; 505. Longitudinal driven pulley; 506. Longitudinal track groove; 507. Sample drop port; 508. Limiting plate; 509. Detection module; 700. Reagent card; 701. Injection hole; 702. Detection groove; 703. Movable insert plate; 704. Fixed base; 705. Clearance hole. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Please see Figure 1-9 This utility model provides a technical solution for an automatic reagent card delivery and testing device: Example

[0031] This embodiment provides an automatic reagent card delivery and testing device, including a base 2, an incubation module and a testing module. The incubation module and the testing module are respectively arranged on the base in the horizontal and vertical directions, and the output end of the incubation module is connected to the starting end of the testing module. The base is also fitted with a shell 1 to protect the various components on the base.

[0032] like Figure 1As shown, the base 2 has an L-shaped structure, consisting of a top plate 201 and a base 202, with an assembly gap between them forming a central interlayer. The incubation module includes a sample loading mechanism 4 and a liquid injection mechanism 3. The liquid injection mechanism 3 includes a storage tank 301, a liquid injection pump 302, and a colorimetric solution injection port 303. The liquid injection pump and the storage tank are both fixedly installed in the central interlayer of the base. The liquid injection pump is connected to the storage tank, and the output end of the storage tank is connected to the colorimetric solution injection port through a delivery pipe. The colorimetric solution injection port is fixedly installed on the top frame 201 by a bracket, and is located above the transverse track groove 401 of the sample loading mechanism, used to inject colorimetric solution into the reagent card 7 in the transverse track groove. In use, the liquid injection pump is driven by the controller to drive the colorimetric solution in the storage tank to the colorimetric solution injection port, so that the colorimetric solution is dripped into the detection slot of the reagent card for detection.

[0033] See Figure 3 - Figure 6 The sample loading mechanism includes a transverse slide rail 411 located on the bottom surface of the base top frame. A first transverse lever 405 is slidably mounted on the transverse slide rail, and a transverse power assembly is fixedly connected to the bottom of the first transverse lever. The transverse power assembly includes a sample loading drive motor 404, and transverse driving pulleys 407 and transverse driven pulleys 408 arranged at transverse intervals. Figure 1 As shown, the sample drive motor is fixedly installed in the base interlayer, and a transverse drive pulley 407 is installed on the output shaft. The transverse driven pulley is fixedly installed at the bottom of the top frame through a pulley seat. An annular transverse synchronous belt 409 is fitted on the transverse drive pulley and the transverse driven pulley. The bottom of the first transverse paddle 405 is fixedly connected to the transverse synchronous belt 409 by bolts. Therefore, when the sample drive motor is controlled to work and drive the transverse synchronous belt to rotate, it can simultaneously drive the first transverse paddle to move laterally.

[0034] like Figure 5 and 6 As shown, a second transverse slide 406 is slidably mounted on the transverse slide rail to the right of the first transverse slide 405, with the two slides initially close together. The second transverse slide is elastically connected to the bolt at the bottom of the top frame via a tension spring. When the first transverse slide slides to the right, it simultaneously presses against the second transverse slide, causing it to slide to the right and stretching the tension spring. After the first transverse slide returns and releases its pressing action on the second transverse slide, the second transverse slide can automatically reset via the tension spring.

[0035] The top of the two sliders is also fitted with a track plate, which is fixedly installed horizontally in the middle of the top frame, forming a horizontal track groove 401 with the top frame. Reagent cards 7 are arranged in the horizontal track groove. A sample placement seat 402 is also installed above the right end of the horizontal track groove, and a sample placement groove 403 is opened in the sample placement seat. In the initial state, the first horizontal lever is located below the sample placement groove. When the reagent card 7 is placed into the sample placement groove, the reagent card is placed on the top of the first horizontal lever. By controlling the rotation of the horizontal synchronous belt, the first horizontal lever is driven to slide to the right, so that the reagent card can be disengaged from the first horizontal lever and fall down onto the horizontal track groove below the sample placement groove. Then, by driving the horizontal synchronous belt to rotate in the opposite direction, the first horizontal lever can be driven to push the reagent card to the left in the horizontal track groove towards the colorimetric solution filling port.

[0036] After the reagent card is pushed to the position below the colorimetric solution filling port, the colorimetric solution can be added into the injection hole 701 of the reagent card through the colorimetric solution filling port. At the same time, the above sample loading operation can be repeated. After the reagent card has completed the injection operation, the reagent card that has completed the injection operation can be pushed by the reagent card on the right to continue moving towards the detection module on the left until it is pushed into the longitudinal track groove of the detection module.

[0037] like Figure 1 and Figure 7 As shown, the detection module includes a pushing mechanism, a detection module 6, and a vertical slider 503. The pushing mechanism is located on the left top frame of the sample loading mechanism and is perpendicular to it. The pushing mechanism includes a longitudinal slide rail 502, a longitudinal power component, and a longitudinal track groove 507 on the top surface of the top frame. The longitudinal track groove is connected to the left end of the transverse track groove. The longitudinal slide rail 502 is fixedly installed on the right rear of the longitudinal track groove, and the vertical slider 503 is slidably installed on the longitudinal slide rail. The vertical slider is fixedly connected to the longitudinal power component, and the vertical slider reciprocates on the longitudinal track groove through the longitudinal power component. See also Figure 5 The detection module 6 is fixedly installed on the top frame at the corner where the longitudinal track groove and the transverse track groove meet. The detection position of the detection module faces the longitudinal track groove and is used to detect the reagent card after it has been displaced on the longitudinal track groove.

[0038] Furthermore, the longitudinal power assembly includes a push motor 501 and longitudinally moving drive pulleys 505 and 506 arranged longitudinally at intervals. The push motor 501 is fixedly mounted on the top frame, and the longitudinally moving drive pulley 505 is connected to the output shaft of the push motor. The longitudinally moving drive pulley is fixedly mounted on the top surface of the top frame through a pulley seat. An annular longitudinal synchronous belt 504 is fitted on the longitudinally moving drive pulley 505 and the longitudinally moving drive pulley 506. The end plate 5031 is fixedly connected to the longitudinal synchronous belt by bolts. With this configuration, when the push motor is driven by the controller to rotate the longitudinal synchronous belt, the longitudinal slider can be simultaneously driven to slide back and forth on the longitudinal slide rail.

[0039] See Figure 7 and Figure 8 The longitudinal slider 503 includes an end plate 5031 and an inclined plate 5032. The end plate is fixed to the longitudinal synchronous belt. The bottom of the inclined plate is provided with hooks 5033 at intervals. The two hooks have guide grooves 5035 along the same axis direction. That is, the two hooks are located on the front and rear sides of the reagent card respectively, and each hook has a guide groove to drive the reagent card to move. The width of the two guide grooves is equal and is greater than the width of the movable insert plate 703 in the reagent card, so that the movable insert plate can pass freely in the guide groove. When in use, the displacement of the reagent card is controlled by driving the hooks to slide back and forth.

[0040] In this embodiment, the guide groove on the hook is located in the middle of the hook to better match the reagent card structure in this embodiment. However, in actual application, the guide groove can be located in the middle of the hook, or it can be a guide groove of a certain width on one or both sides of the hook. That is, the location and size of the guide groove on the hook can be flexibly set according to different reagent card structures, which is highly flexible.

[0041] like Figure 4 As shown, in this embodiment, the reagent card 7 consists of a fixed base 704 and a movable insert plate 703. The movable insert plate is slidably inserted into the fixed base 704, and has an injection hole 701 for adding colorimetric solution. The top of the fixed base also has a circular clearance hole 705 and a rectangular detection groove 702. The inner diameter of the clearance hole is larger than the inner diameter of the injection hole on the movable insert plate. In the initial state, the upper part of the movable insert plate is inserted into the fixed base, and the lower part extends out of the fixed base. At the same time, the position of the injection hole on the movable insert plate overlaps with the clearance hole, and colorimetric solution is injected into the injection hole to keep the reagent card in an incubation state. After the reagent card moves into the longitudinal track groove, the displacement of the fixed base is controlled by the longitudinal slider, so that the injection hole of the movable insert plate is exposed into the detection groove of the fixed base, making it ready for testing.

[0042] This invention provides an automatic reagent card delivery and testing device, which, in practical applications, can achieve the following: Figure 9The cyclical working state shown is as follows: First, the reagent card is placed in the sample placement slot 403 of the sample placement seat 402. The controller drives the sample loading drive motor 404 to work, which drives the transverse synchronous belt 409 to rotate to the right. The transverse synchronous belt drives the first transverse paddle 405 to move to the right and pushes the second transverse paddle 406 on the right side. At the same time, the tension spring on the second transverse paddle is stretched. After the reagent card in the placement tank falls into the transverse track slot 401, the sample loading drive motor is controlled to rotate in the opposite direction, which drives the first transverse paddle to move to the left and pushes the reagent card to the left, so that it moves to directly below the colorimetric solution filling port. The second transverse paddle is reset under the action of the tension spring. The controller drives the injection pump 302 to drip colorimetric solution into the injection hole of the reagent card through the colorimetric solution filling port 303. At the same time, the controller controls the first transverse paddle to return to the bottom of the sample placement tank.

[0043] The above steps are repeated, and as the number of reagent cards placed in the horizontal track groove increases, the reagent card in the front position that has been injected with colorimetric solution will be pushed to the left by the reagent card in the rear position that is to be added with colorimetric solution, and the reagent cards in the rear position will continue to line up until they are pushed into the vertical track groove 507. In the initial state, the vertical slider is located at the front end of the vertical track groove, and the gap between the two hooks on the vertical slider corresponds to the horizontal track groove to receive the reagent card to be tested. In this way, after the reagent card moves from the horizontal track groove to the vertical track groove, it enters the gap between the two hooks of the vertical slider, and the bottom of the movable insert plate 703 of the reagent card contacts the limiting plate 509 on the vertical track groove. The hook on the side of the vertical slider near the longitudinal driven pulley 506 is clamped on the outside of the limiting plate, which facilitates the repositioning operation of the reagent card in the incubation state in preparation for RGB detection.

[0044] During repositioning, the controller drives the push motor 501 to rotate, which in turn drives the longitudinal synchronous belt 504 to rotate. The rotation of the longitudinal synchronous belt drives the longitudinal slider 503 to move forward, thereby causing the hook on the side of the longitudinal slider near the push motor to push the fixed base 704 of the reagent card forward until the bottom of the fixed base contacts the rear end of the limiting plate and the liquid injection hole of the movable insert is exposed in the middle of the detection groove. After repositioning, the detection module 6 above the reagent card performs RGB detection on the reagent card. After the detection is completed, the push motor is controlled to rotate in the opposite direction, thereby driving the longitudinal slider to move backward. At the same time, the hook on the side of the longitudinal slider near the longitudinal driven pulley pushes the detected reagent card backward until it is pushed into the drop port 508 behind the longitudinal track groove and removed. The reagent card then falls into the interlayer of the base, thus completing the automatic liquid injection, delivery, and detection operations for one reagent card. Then, the longitudinal slider is controlled to return to the initial position, and the above operations are repeated for the next reagent card.

[0045] In addition, since the height of the guide groove 5035 on the hook is slightly greater than the insertion height of the movable insert plate in the reagent card fixing base, when the hook on the longitudinal slider pushes the reagent card to move backward, it may only push the fixing base to move backward and not push the movable insert plate to move backward at the same time. Therefore, in this embodiment, an elastic component 5034 is also provided on the hook near the longitudinally driven hook.

[0046] like Figure 8 As shown, the elastic component includes a mounting hole 5036 vertically formed on the hook, a top spring 5037 fixed inside the mounting hole, and a top rod 5038 fixedly connected to the bottom of the top spring. The bottom of the top rod is an arc-shaped end face 5039. In its natural state, under the action of the top spring, the top rod extends downward along the Z-axis out of the mounting hole. When the longitudinal slider moves downward longitudinally so that the hook is located on the outer periphery of the limiting plate, the limiting plate can contact the arc-shaped end face and press upward to retract it upward. After the reagent card completes the test, the longitudinal slider moves towards the sample outlet, and at the same time, the top rod extends under the action of the top spring, pushing the movable insert plate inside the reagent card forward. This setting ensures that during the process of pushing the reagent card backward, the hook can not only push the fixed base, but also push the movable insert plate backward at the same time, avoiding the situation where only the fixed base is pushed but the movable insert plate cannot be pushed.

[0047] This invention provides an automatic reagent card delivery and testing device that can automatically complete a series of operations such as reagent card placement, delivery, liquid injection, testing, and removal, significantly reducing manual intervention, lowering labor costs and human error, and improving overall work efficiency and testing accuracy.

[0048] The above description is only a preferred embodiment of the present utility model and does not limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reagent card automatic conveying and detecting device, comprising a base (2), an incubation module and a detection module, characterized in that: The incubation module and the detection module are respectively arranged on the base (2) in the horizontal and vertical directions, and the output end of the incubation module is connected to the starting end of the detection module; The incubation module includes a sample loading mechanism (4) and a liquid injection mechanism (3). The sample loading mechanism (4) includes a slider group and a transverse track groove (401) on the base (2). The bottom of the slider group is connected to a transverse power component, and the top is slidably mounted on the transverse track groove (401). Reagent cards (7) are arranged in sequence in the transverse track groove (401). The colorimetric liquid injection port (303) of the liquid injection mechanism (3) is located above the reagent cards (7) in the transverse track groove (401). A heating plate (410) is fixed at the bottom of the starting end of the transverse track groove (401), and the end is connected to the starting end of the detection module. The detection module includes a longitudinal slider (503), a longitudinal track groove (507), and a detection module (6). The longitudinal track groove (507) is connected to the left end of the transverse track groove (401). The longitudinal slider (503) slides back and forth on the longitudinal track groove (507) through a longitudinal power component. The bottom of the longitudinal slider (503) is symmetrically provided with hooks (5033). The two hooks (5033) are located on the front and rear sides of the reagent card (7), and each hook (5033) has a guide groove (5035) to drive the reagent card (7) to change position. The detection module (6) is located above the hooks (5033). The base (2) at the end of the longitudinal track groove (507) has a sample drop port (508).

2. The reagent card automatic conveying and detecting device according to claim 1, characterized in that: The lateral power assembly includes a sample drive motor (404), and a transverse active pulley (407) and a transverse driven pulley (408) arranged at transverse intervals. The transverse active pulley (407) is mounted on the output shaft of the sample drive motor (404), and the transverse driven pulley (408) is fixedly mounted on the bottom of the base (2) top frame through a pulley seat. An annular transverse synchronous belt (409) is fitted on the transverse active pulley (407) and the transverse driven pulley (408). The bottom of the first transverse paddle (405) is fixedly connected to the transverse synchronous belt (409) by bolts.

3. The reagent card automatic conveying and detecting device according to claim 1, characterized in that: The slider assembly includes a first transverse paddle (405) and a second transverse paddle (406). The bottom of the first transverse paddle (405) is fixedly connected to a transverse synchronous belt (409), and the second transverse paddle (406) is elastically connected to the bolt at the bottom of the base (2) top frame via a tension spring.

4. The reagent card automatic conveying and detecting device according to claim 1, characterized in that: The longitudinal power assembly includes a push motor (501) and longitudinal drive pulleys (505) and longitudinal driven pulleys (506) arranged longitudinally at intervals. The push motor (501) is fixedly mounted on the base (2). The output shaft of the push motor (501) is connected to the longitudinal drive pulley (505). The longitudinal driven pulley (506) is fixedly mounted on the top surface of the top frame through a pulley seat. An annular longitudinal synchronous belt (504) is fitted on the longitudinal drive pulley (505) and the longitudinal driven pulley (506).

5. The reagent card automatic conveying and detecting device according to claim 1, characterized in that: The liquid injection mechanism (3) includes a storage tank (301), a liquid injection pump (302), and a colorimetric liquid injection port (303). The liquid injection pump (302) and the storage tank (301) are both fixedly installed in the base (2). The liquid injection pump (302) is connected to the storage tank (301). The output end of the storage tank (301) is connected to the colorimetric liquid injection port (303) through a liquid infusion pipe. The colorimetric liquid injection port (303) is fixedly installed on the base (2) by a bracket, and the colorimetric liquid injection port (303) is located above the reagent card (7) in the transverse track groove (401).

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