Biochemical analyzer with ion-selective electrode module

Abstract

The invention provides a biochemical analyzer with an ion selective electrode module, and relates to the technical field of medical instruments. The biochemical analyzer comprises an electrolyte detection module, and the electrolyte detection module specifically comprises an ion selective electrode module which comprises a shell and a plurality of electrodes which are arranged in the shell, are mutually sealed and clung to each other and form an electrode channel; a sampling pool; a liquid detection cartridge; the pump module comprises a first pumping assembly, a second pumping assembly and a third pumping assembly; the reagent pack module comprises a first reagent pack storing first correction liquid, a second reagent pack storing second correction liquid and a waste liquid piece used for receiving waste liquid, and the first correction liquid, the second correction liquid and the sample to be detected can pass through the electrode channel under the action of different pumping assemblies; each pumping assembly comprises a clamping base assembly which is correspondingly and elastically connected with the first pump pipe, the second pump pipe and the third pump pipe in an abutting mode. The biochemical analyzer provided by the invention has the advantages of high precision and good reliability.

Description

[0001] This application is a divisional application of the invention patent application filed on October 14, 2024, with the invention name “Electrolyte Detection Module and Biochemical Analyzer” and application number 202411431354.1. Technical Field

[0002] The present invention relates to the technical field of medical devices, and in particular to a biochemical analyzer with an ion selective electrode module. Background Art

[0003] Currently, clinical studies on Li in serum, plasma or diluted urine samples are + 、Na + , K + , Cl - The main methods for detecting plasma concentration are enzyme method, flame photometry, ion selective electrode method, etc. ISE is the abbreviation of ion selective electrode. The test method of electrolyte detection module of biochemical analyzer (using optical (colorimetric, turbidimetric) method) is different from that of ISE (electrochemical method). A separate electrolyte detection module is required to realize the electrode method test of ion item concentration on the biochemical analyzer, so as to meet the requirements of Li + 、Na + , K + , Cl - Determination of plasma concentration. Ion selective electrode analysis is an electrochemical technique that uses the relationship between electrode potential and ion activity to determine ion concentration. The change in electrode potential conforms to the Nernst equation, that is, the logarithm of ion activity in the solution is linearly related to the electrode potential. The "selection" of ion selective electrode means that an ion is only sensitive to its specific electrode, that is, a specific electrode is required to detect an ion. Therefore, the existing electrolyte detection module needs to be equipped with multiple ion detection units that detect one of the ions separately.

[0004] The electrolyte detection module on the biochemical analyzer has been widely used in clinical practice. The ISE indirect method is now mostly used for determination. The sample needs to be quantitatively diluted with a diluent, and then its electrode potential is measured. The ion selective electrode method is an analytical method with higher precision and accuracy, so it is widely promoted in clinical practice. However, the pumping mechanism of the electrolyte detection module on the current biochemical analyzer for pumping reagents, samples and other liquids has the disadvantage that the pumping mechanism has a large difference in the amount of liquid pumped per unit time, especially because the pump tube of the pumping mechanism cannot obtain a continuous elastic contact force, which leads to a reduction in the accuracy of the detection, thereby adversely affecting the reliability of the detection. Summary of the invention

[0005] The present invention aims to solve the problems of low accuracy and low reliability of electrolyte detection in the above-mentioned existing biochemical analyzers. To achieve one purpose of the present invention, a biochemical analyzer with an ion selective electrode module is provided, comprising:

[0006] An electrolyte detection module, the electrolyte detection module comprising:

[0007] An ion selective electrode module comprises a housing and a plurality of electrodes arranged in the housing and sealed tightly against each other, wherein an electrode channel is formed between each of the electrodes;

[0008] A sampling pool, which is arranged above the ion selective electrode module, and the sampling pool is provided with a first liquid inlet, a second liquid inlet and a sample inlet, and the sample inlet can receive a sample to be tested;

[0009] A liquid detection box, which is arranged between the sampling pool and the ion selective electrode module, the sampling pool is connected to the electrode channel via the liquid detection box, and the liquid detection box detects the state of the liquid therein;

[0010] A pump module comprising a first pumping assembly, a second pumping assembly and a third pumping assembly;

[0011] A reagent pack module, comprising a first reagent pack storing a first calibration liquid, a second reagent pack storing a second calibration liquid and a waste liquid part for receiving waste liquid, wherein the liquid outlet of the first reagent pack is connected with the first liquid inlet through the first pump tube of the first pumping component, the liquid outlet of the second reagent pack is connected with the second liquid inlet through the second pump tube of the second pumping component, the waste liquid outlet of the ion selective electrode module relatively located downstream of the electrode channel is connected with the waste liquid inlet of the waste liquid part through the third pump tube of the third pumping component, the first calibration liquid, the second calibration liquid and the sample to be tested can pass through the electrode channel under the action of different pumping components respectively, and each pumping component comprises a holder component elastically abutting against the first pump tube, the second pump tube and the third pump tube respectively.

[0012] Furthermore, the pump module also includes a mounting bracket for mounting each pumping component, each pumping component includes a peristaltic pump and a rotating component, the peristaltic pump drives the rotating component to rotate, the base assembly includes an elastic member, a fixed seat and a spring socket, the fixed seat includes a fixed seat body and a plurality of seat fixing holes, a pair of abutting seats, a pair of card slots and a first arc surface provided on the fixed seat body, the spring socket includes a spring socket body and a pair of accommodating grooves, a pair of abutting holes, a pair of buckles and a second arc surface provided on the spring socket body, the abutting holes are provided at the top of the accommodating grooves, the elastic member is arranged in the accommodating grooves, the elastic member is elastically deformed and is located between the paired abutting seats and the abutting holes, the buckles and the card slots are snap-fitted in pairs, the spring socket can move up and down in the vertical direction under the elastic force of the elastic member, thereby applying an elastic abutting force to the corresponding pump tube located between the second arc surface and the rotating component, so that the corresponding pump tube stably and evenly transports liquid under the rotational force of the rotating component.

[0013] Furthermore, the abutment seat includes a convex plate with a circular arc convex surface and a convex block provided on the convex plate and having a circular arc concave surface, the accommodating groove has a groove arc surface, the circular arc convex surface is adaptively abutted against the groove arc surface, the abutment hole is set as a circular through hole, and in the vertical direction, the projected edge of the circular arc concave surface overlaps with the projected edge of the abutment hole.

[0014] Furthermore, the peristaltic pump includes a pump body and a drive shaft, the rotating assembly includes a turntable, a plurality of roller assemblies and an end cover, the turntable is provided with a disk hole passing through its center line and a plurality of disk through holes uniformly distributed around the disk hole and the same number as the roller assemblies, the roller assembly includes a plug post and a roller, the roller is provided with a roller through hole, one end of the plug post is fixed in the disk through hole and the other end is protrudingly inserted in the roller through hole, the plurality of rollers of each rotating assembly are tangent to a common outer circle, and each of the rollers rotates in sequence and reciprocatingly The end cover acts on the pump tube to provide a force for liquid flow, the end cover includes a round cover body and a convex column with a column hole extending along the central axis of the round cover body, the drive shaft is fixed to the column hole through the disk hole, the diameter value of the round cover body and the outer diameter value of the turntable are both greater than the diameter value of the common outer circle, the end cover and the free end gaps of each of the plug columns are opposite, the turntable and the first arc surface have a common center and the circumferential surfaces are opposite, and the radial spacing value of the turntable and the first arc surface is greater than the diameter value of the pump tube acted upon by the roller.

[0015] Furthermore, the fixing seat body is provided with a pair of slots respectively connected with the card slot, the slots are located above the card slot and extend in the vertical direction, a vertical surface of the slot is connected to a vertical surface of the slot, and in the horizontal direction, the width of the slot is greater than the width of the slot, and the fixing seat is also provided with a protrusion protruding toward the card slot from the bottom of the slot, and the protrusion is provided with a guide surface inclined from the slot to the card slot, the buckle is inserted into the slot and elastically deformed and snapped into the card slot under the guidance of the guide surface, and the buckle can move in the length direction of the card slot in the vertical direction, and a pair of arc convex ribs are also arranged at intervals on the second arc surface of the spring socket body, and the pair of arc convex ribs limit the pump tube located therebetween in the radial direction.

[0016] Furthermore, a pair of protruding sliding blocks are provided on the surface of the spring socket body facing the fixed seat body, and the protruding sliding blocks are rectangular in the vertical direction. A concave portion is provided in the protruding sliding block. When the buckle and the slot are engaged with each other, the spring socket body and the fixed seat body are fitted with each other, and the protruding sliding blocks slide correspondingly on the outer sides of the adjacent grooves and the slots of the fixed seat body, and the concave portion is connected to the groove.

[0017] Furthermore, the pump module also includes a plurality of fixing plates, the fixing plates are provided with a pair of plate grooves, each plate groove is respectively fixed with a guide tube, one end of the pair of guide tubes are respectively connected to the two end pipe openings of a pump tube and the other ends are respectively connected to the ion selective electrode module and the reagent package module via two liquid pipelines, the mounting bracket is provided with three frame through holes and a plurality of frame fixing holes, the fixing plates are arranged on the corresponding frame fixing holes, the fixing plates are provided with plate through holes and plate fixing holes, the plate through holes are for the flange part of the pump body surrounding the driving shaft to penetrate, the pump body is also provided with a plurality of pump fixing holes, the plurality of seat fixing holes include a pair of first seat fixing holes and a pair of second seat fixing holes, the fixed seat body includes a pair of recessed portions which are recessed by a first arc surface obliquely toward the adjacent slot direction and a pair of recessed portions which are respectively facing away from the first arc surface. The fixing column of the recessed portion, the first seat fixing hole is arranged in the fixing column and communicates with the recessed portion, the second seat fixing hole is arranged at two corners of the lower end of the fixing seat body, a fixing piece is installed in each of the relative plate fixing hole and the pump fixing hole, a fixing piece is installed in each of the relative first seat fixing hole, the plate fixing hole and the pump fixing hole, a fixing piece is installed in each of the relative plate fixing hole and the frame fixing hole, and a fixing piece is installed in each of the relative second seat fixing hole and the frame fixing hole; relative to a vertical plane passing through the central axis of the drive shaft, the pair of abutting seats, the pair of card slots, the pair of accommodating slots, the pair of abutting holes, the pair of buckles, the pair of slots, the pair of protruding sliding blocks, the pair of first seat fixing holes and the pair of second seat fixing holes are symmetrically arranged.

[0018] Further, the electrolyte detection module also includes a displacement component corresponding to each pumping component, the displacement component includes a drive motor and a threaded rod connected to the drive motor, the drive motor can drive the threaded rod to rotate in the first direction and the second direction respectively, the spring socket body is provided with a groove portion and a connecting portion opposite to the groove portion, the connecting portion is provided with a threaded hole, the drive motor is fixed on the side of the connecting portion away from the groove portion, the threaded rod is threadedly connected and penetrated in the threaded hole, the threaded rod can perform telescopic movement relative to the groove portion, the reagent package module is provided with a first flow rate detector and a second flow rate detector for detecting the outflow speed of the first correction liquid and the second correction liquid respectively, and a third flow rate detector for detecting the inflow speed of the waste liquid, the drive motor controls the rotation direction and the number of rotations of the threaded rod according to the flow rate detection value of the liquid pumped by the corresponding pumping component measured by the corresponding flow rate detector, so that the threaded rod drives the spring socket body to move along or against the direction of the elastic force, so as to adjust the elastic abutment force applied by the spring socket of the corresponding cartridge assembly to the corresponding pump tube.

[0019] Furthermore, the biochemical analyzer with an ion-selective electrode module also includes a controller, and the drive motor and each flow rate detector can communicate with the controller wirelessly or wired, and the controller can generate a control signal for controlling the operation of the drive motor according to the communication data; when the flow rate detection value is less than a first preset flow rate value, the control signal can control the drive motor to output a rotational force rotating along the first direction, so that the threaded rod drives the elastic socket body to move a certain distance in a parallel and opposite direction to overcome the elastic force of the elastic member, so that the flow rate detection value meets the preset flow rate value; when the flow rate detection value is greater than a second preset flow rate value, the control signal can control the drive motor to output a rotational force rotating along the second direction, so that the threaded rod drives the elastic socket body to move a certain distance in a direction parallel to the elastic force of the elastic member, so that the flow rate detection value meets the preset flow rate value; wherein, the second preset flow rate value is greater than the first preset flow rate value by a preset percentage.

[0020] Furthermore, the mounting bracket includes a first mounting plate, a second mounting plate, a third mounting plate and a fourth mounting plate, the first mounting plate extending in a horizontal direction, the second mounting plate including a connecting support plate, a fixed support plate and a bent support plate, the connecting support plate is connected to the front edge of the first mounting plate and extends upward, the fixed support plate is connected to the connecting support plate and extends in a direction inclined at an acute angle toward the first mounting plate, the bent support plate is connected to the inclined end edge of the fixed support plate, an obtuse angle is formed between the bent support plate and the fixed support plate, the third mounting plate is connected to the side edge of the first mounting plate and extends upward, the fourth mounting plate The mounting plate is connected to the extended end of the third mounting plate and extends in a direction relatively away from the bent support plate, the bent support plate is parallel to the fourth mounting plate, a socket is provided on the third mounting plate, a plug block is provided on the side of the bent support plate and is plugged and fixed in the socket, the third mounting plate and the fourth mounting plate are both provided with plate holes corresponding to the shell holes of the shell respectively, the corresponding plate holes and the shell holes are fixedly connected by fixing members, the first mounting plate is provided with a lift piece with a locking hole, the mounting bracket is locked in position by a metal locking member fixed in the locking hole and the mounting bracket and the shell are grounded together.

[0021] The beneficial effects of the present invention are:

[0022] The electrolyte detection module in the biochemical analyzer with an ion selective electrode module provided by the present invention is provided with a holder assembly that applies elastic abutment force to the first pump tube, the second pump tube and the third pump tube, so that each pumping assembly can use the holder assembly to apply a constant elastic abutment force to the corresponding pump tube, thereby achieving the goal of pumping the liquid in the pump tube and the liquid in the entire liquid pipeline connected to the pump tube through the ion selective electrode module at a uniform speed and in a uniform amount, thereby achieving a technical effect of high detection accuracy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment of the present invention will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the present invention.

[0024] Figure 1 This is a schematic diagram of the overall structure of an electrolyte detection module according to an embodiment of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a pump module of an electrolyte detection module according to an embodiment of the present invention;

[0026] Figure 3 It is a structural schematic diagram mainly showing a first pumping component of a pump module of an electrolyte detection module according to an embodiment of the present invention;

[0027] Figure 4 To correspond to Figure 3 Explosion diagram of

[0028] Figure 5 It is a schematic diagram of the main structure of the fixing seat of the pumping assembly of the pump module of the electrolyte detection module according to an embodiment of the present invention in the front view direction;

[0029] Figure 6 It is a schematic diagram of the front view structure of the fixing seat of the pumping assembly of the pump module of the electrolyte detection module according to an embodiment of the present invention in the rear view direction;

[0030] Figure 7 It is a schematic diagram of the main structure of the spring socket of the pumping assembly of the pump module of the electrolyte detection module according to an embodiment of the present invention in the front view direction;

[0031] Figure 8 It is a schematic diagram of the front view of the spring socket of the pumping assembly of the pump module of the electrolyte detection module according to an embodiment of the present invention in the rear view direction;

[0032] Fig. 9 This is a schematic structural diagram of an end cover of a pumping assembly of a pump module of an electrolyte detection module according to an embodiment of the present invention;

[0033] Fig.10 It is a schematic diagram mainly showing the structure of the mounting bracket of the pump module of the electrolyte detection module according to the embodiment of the present invention;

[0034] Description of reference numerals:

[0035] 1. ion selective electrode module; 11. housing; 12. electrode; 2. sampling cell; 21. sample inlet; 3. liquid detection box; 4. pump module; 41. first pumping assembly; 411. first pump tube; 42. second pumping assembly; 421. second pump tube; 43. third pumping assembly; 431. third pump tube; 44. holder assembly; 441. elastic member; 442. fixing seat; 4421. fixing seat body; 44211. recessed portion; 44212. fixing column; 4422 , first seat fixing hole; 4423, second seat fixing hole; 4424, abutment seat; 44241, convex plate; 44242, convex block; 4425, card slot; 4426, first arc surface; 4427, slot; 4428, boss; 44281, card guide surface; 443, spring socket; 4431, spring socket body; 4432, receiving groove; 4433, abutment hole; 4434, buckle; 4435, second arc surface; 4436, arc convex rib; 4437, groove portion; 44 38, connecting part; 447, protruding slider; 448, concave part; 45, fixing plate; 451, plate through hole; 452, plate fixing hole; 453, plate groove; 46, guide tube; 47, peristaltic pump; 471, pump body; 4711, flange; 4712, pump fixing hole; 472, drive shaft; 48, rotating assembly; 481, rotating disk; 4811, disk hole; 4812, disk through hole; 482, rotating roller assembly; 4821, plug column; 4822, roller; 483, end cover; 48 31. Round cover body; 4832. convex column; 48321. column hole; 49. mounting bracket; 491. rack through hole; 492. rack fixing hole; 493. first mounting plate; 4931. locking hole; 4932. tilting piece; 494. second mounting plate; 4941. connecting support plate; 4942. fixing support plate; 4943. bending support plate; 49431. plug-in block; 495. third mounting plate; 4951. socket; 496. fourth mounting plate; 497. plate hole; 5. reagent package module. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described in conjunction with the drawings in the embodiment of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Moreover, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element limited by the sentence "comprising..." does not exclude the presence of other identical elements in the process, method, article or device including the element. If there is no conflict, the embodiments of the present invention and the various features in the embodiments can be combined with each other, all within the scope of protection of the present invention.

[0037] Please refer to Figures 1 to 10The embodiment of the present invention provides an electrolyte detection module, which includes: an ion selective electrode module 1, a sampling pool 2, a liquid detection box 3, a pump module 4 and a reagent package module 5. The ion selective electrode module 1 includes a housing 11 and a plurality of electrodes 12 that are sealed and tightly attached to each other and arranged in the housing 11. It is known that the electrode 12 can specifically include an ion selective electrode, i.e., an ISE electrode and a reference electrode, and an electrode channel is formed between each electrode 12. The sampling pool 2 is arranged above the ion selective electrode module 1. The sampling pool 2 is provided with a first liquid inlet, a second liquid inlet (not shown) and a sample inlet 21. The sample inlet 21 can receive a sample to be tested, and the sample to be tested can be transported to the sampling pool 2 by a biochemical analyzer. The liquid detection box 3 is arranged between the sampling pool 2 and the ion selective electrode module 1. The sampling pool 2 is connected to the electrode channel via the liquid detection box 3. The liquid detection box 3 detects the state of the liquid therein, and the liquid state includes the bubble content in the liquid, the presence or absence of liquid, etc. The pump module 4 includes a first pumping component 41, a second pumping component 42 and a third pumping component 43. The reagent pack module 5 includes a first reagent pack (not shown) storing a first calibration fluid, a second reagent pack (not shown) storing a second calibration fluid and a waste liquid component (not shown) for receiving waste liquid, which may be a waste liquid bag, a waste liquid collection bucket, etc. Figure 1As shown, the first reagent pack and the second reagent pack are arranged on the side of the reagent pack module 5, which is convenient for replacing each reagent pack. In addition, when the waste liquid part is a waste liquid bag, it is also arranged on the side of the reagent pack module 5. When the waste liquid part is a waste liquid collection bucket, it can be arranged as an external part outside the electrolyte detection module. The first correction liquid can be specifically a drift correction liquid, and the second correction liquid can be specifically a slope correction liquid. The liquid outlet of the first reagent pack passes through the first pump tube 411 of the first pumping component 41 and is connected to the first liquid inlet of the ion selective electrode module 1. The liquid outlet of the second reagent pack passes through the second pump tube 421 of the second pumping component 42 and is connected to the second liquid inlet of the ion selective electrode module 1. The waste liquid outlet of the ion selective electrode module 1, which is relatively located downstream of the electrode channel, passes through the third pump tube 431 of the third pumping component 43 and is connected to the waste liquid inlet of the waste liquid part. The first correction liquid can be in the first pumping component 41. The first liquid inlet and the second liquid inlet of the ion selective electrode module 1 and the waste liquid outlet are connected through the electrode channel, and the liquid in the sampling pool 2 is transported to the electrode channel by the third pumping component 43 for detection, cleaning of the electrode 12, etc. More specifically, the flow direction of the liquid in the housing 11 passes through the sampling pool 2, the liquid detection box 3, the Li+ electrode 12, the Na+ electrode 12, the K+ electrode 12, the Cl electrode 12, the reference electrode 12, the pressure plate and the pressure plate adapter in sequence. The pressure plate and the pressure plate adapter are known to those skilled in the art and will not be described in detail here. The two calibration solutions and the sample to be tested are transported to the electrode channel by three pumping components in cooperation, wherein the first calibration solution and the second calibration solution are transported to the sampling pool 2 by two separate peristaltic pumps. The waste liquid outlet of the ion selective electrode module 1 is arranged on the pressure plate adapter. Each pumping component includes a holder component 44 elastically abutting against the first pump tube 411, the second pump tube 421 and the third pump tube 431 respectively.

[0038] Therefore, by providing a holder assembly 44 for each of the first pumping assembly 41, the second pumping assembly 42 and the third pumping assembly 43 to apply elastic abutment force to the first pump tube 411, the second pump tube 421 and the third pump tube 431 respectively, each pump tube can obtain a continuous elastic abutment force, so that each pumping assembly uses its holder assembly 44 to apply a constant elastic abutment force to the corresponding pump tube, so that the liquid in the pump tube and even the liquid in the entire liquid pipeline connected to the pump tube is pumped through the ion selective electrode module 1 at a uniform speed and in a uniform amount, thereby ensuring that there is basically no difference in the amount of liquid pumped per unit time, ensuring that each electrode 12 obtains an accurate amount of calibration liquid or liquid of the sample to be tested within a preset time, and can also reduce the adverse effects of the peristaltic pump 47 operating error or uncalibrated on the precise liquid pumping amount, thereby achieving the beneficial technical effects of high detection accuracy and high reliability.

[0039] Please refer to Figures 2 to 8 Specifically, the pump module 4 also includes a mounting bracket 49 for mounting each pumping component, each pumping component includes a peristaltic pump 47 and a rotating component 48, the peristaltic pump 47 drives the rotating component 48 to rotate, the card seat assembly 44 includes an elastic member 441, a fixed seat 442 and a spring socket 443, the fixed seat 442 includes a fixed seat body 4421 and a plurality of seat fixing holes provided on the fixed seat body 4421, a pair of abutting seats 4424, a pair of card slots 4425 and a first arc surface 4426, the spring socket 443 includes a spring socket body 4431 and a pair of accommodating grooves 4432, a pair of abutting holes 4433, A pair of buckles 4434 and a second arc surface 4435, and an abutment hole 4433 are provided at the top of the accommodating groove 4432, and an elastic member 441 is arranged in the accommodating groove 4432. The elastic member 441 is located between the paired abutment seats 4424 and the abutment holes 4433 by, for example, elastic compression deformation. The buckles 4434 and the slots 4425 are snap-fitted in pairs, and the spring sockets 443 can move up and down in the vertical direction under the elastic force of the elastic member 441, thereby applying an elastic abutment force to the corresponding pump tube located between the second arc surface 4435 and the rotating assembly 48, so that the corresponding pump tube can stably and evenly transport liquid under the rotational force of the rotating assembly 48. In this way, the fixed seat 442 and the spring socket 443 of the base assembly 44 are not only reliably connected, but the elastic member 441 is well positioned between the fixed seat 442 and the spring socket 443 to apply a vertically upward elastic force to the spring socket 443, ensuring that the second arc surface 4435 remains pressed against the corresponding pump tube, so that the diameter of the pump tube remains consistent between the second arc surface 4435 and the rotating assembly 48, especially its rollers (which will be further explained below), thereby ensuring that the volume of liquid flowing through the cross-section of the pump tube per unit time remains consistent.

[0040] Please refer to Figures 5 to 8Preferably, the abutment seat 4424 includes a convex plate 44241 with a circular arc convex surface and a convex block 44242 provided on the convex plate 44241 and having a circular arc concave surface. The accommodating groove 4432 has a groove arc surface, and the circular arc convex surface abuts against the groove arc surface in an adaptive manner. The abutment hole 4433 is set as a circular through hole. In the vertical direction, the projected edge of the circular arc concave surface overlaps with the projected edge of the abutment hole 4433. The elastic member 441 is set as a spring. Not only are the circular ends of the spring reliably positioned between the abutment hole 4433 and the convex plate 44241, but the groove arc surface can also limit the middle part of the spring. Moreover, the spring has low cost and the corresponding relationship between the compression deformation and the compression elastic restoring force is easy to determine, so that the stroke of the spring socket 443 in the vertical direction can be accurately determined.

[0041] Please refer to Figure 4 Specifically, the peristaltic pump 47 includes a pump body 471 and a drive shaft 472, the rotating assembly 48 includes a turntable 481, a plurality of roller assemblies 482 and an end cover 483, the turntable 481 is provided with a disk hole 4811 passing through its center line and a plurality of disk through holes 4812 uniformly distributed around the disk hole 4811 and the same number as the roller assembly 482, the roller assembly 482 includes a plug post 4821 and a roller 4822, the roller 4822 is provided with a through hole, one end of the plug post 4821 is fixed in the disk through hole 4812 and the other end is protrudingly inserted in the through hole, the insertion can be fixed or rotatably inserted, and each of the plurality of rollers of the rotating assembly 48 The cylinder 4822 is tangent to a common outer circle, and each roller 4822 acts on the pump tube in sequence and reciprocatingly to provide a force for the liquid to flow. In this way, the pump tube can transport the liquid evenly. The end cover 483 includes a circular cover body 4831 and a convex column 4832 with a column hole 48321 extending along the central axis of the circular cover body 4831. The drive shaft 472 is fixed to the column hole 48321 through the disk hole 4811. The diameter value of the circular cover body 4831 and the outer diameter value of the turntable 481 are both greater than the diameter value of the common outer circle. Therefore, the end cover 483 and the turntable 481 can limit the pump tube to be located between the two to prevent it from detaching from the roller 4822 outward.

[0042] Please refer to Figures 4 to 8Specifically, a pair of slots 4427 are provided on the fixing seat body 4421, each of which is connected to a slot 4425. The slots 4427 are located above the slots 4425 and extend in the vertical direction. A vertical surface of the slot 4427 is connected to a vertical surface of the slot 4425. In the horizontal direction, the width of the slot 4427 is greater than the width of the slot 4425. The fixing seat 442 is also provided with a protrusion 4428 protruding toward the slot 4425 under the slot 4427. The protrusion 4428 is provided with a protrusion formed by the slot The guide surface 44281 of the card slot 4427 is inclined toward the card slot 4425, and the buckle 4434 is inserted into the slot 4427 and elastically deformed and snapped into the card slot 4425 under the guidance of the guide surface 44281. Therefore, a pair of buckles 4434 can be elastically deformed and inserted into the card slot 4425 under the guidance of a pair of guide surfaces 44281 and snapped into the card slot 4425, thereby respectively installing the buckle 4434 and realizing reliable elastic snapping cooperation between the spring socket 443 and the fixing seat 442. The buckle 4434 can move in the length direction of the card slot 4425 in the vertical direction, so the stroke of the buckle 4434, that is, the spring socket 443 in the vertical direction can be accurately limited by the length of the card slot 4425. A pair of arc convex ribs 4436 are arranged at intervals on the second arc surface 4435 of the spring socket body 4431. The pair of arc convex ribs 4436 limit the pump tube located therebetween in radial direction, so that the pump tube is reliably limited in both radial and circumferential directions.

[0043] Please refer to Figure 6 and Figure 8 Specifically, a pair of protruding sliders 447 are provided on the surface of the spring socket body 4431 facing the fixed seat body 4421. The protruding slider 447 is in the shape of a rectangular parallelepiped along the vertical direction. A concave portion 448 is provided in the protruding slider 447. When the buckle 4434 is engaged with the card slot 4425, the spring socket body 4431 and the fixed seat body 4421 fit each other, and the protruding slider 447 slides on the outer sides of the adjacent slots 4427 and the card slots 4425 of the fixed seat body 4421 accordingly, and the concave portion 448 is aligned with the slots 4427. Therefore, by setting a pair of protruding sliders 447, the friction of the spring socket body 4431 sliding on the fixed seat body 4421 can be reduced, and the wear of the spring socket body 4431 can be reduced. In addition, by setting the recessed portion 448, it is helpful to timely guide the airflow generated by the movement of the buckle 4434 in the slot 4425 to flow to the atmosphere through the slot 4427 and the recessed portion 448, thereby preventing the reaction force on the buckle 4434 caused by the compression of the air in the slot 4425, thereby avoiding the adverse effect that may be caused to the smooth movement of the buckle 4434.

[0044] Please refer to Figures 4 to 6Specifically, the pump module 4 also includes a plurality of fixing plates 45, for example three, the fixing plate 45 is provided with a pair of plate grooves 453, each plate groove 453 is respectively fixed with a guide tube 46, one end of the pair of guide tubes 46 is respectively connected to the two end nozzles of a pump tube and the other end is respectively connected to the ion selective electrode module 1 and the reagent package module 5 via two liquid pipelines. It can be understood that the liquid pipeline includes a calibration liquid pipeline and a waste liquid pipeline. Three frame through holes 491 and a plurality of frame fixing holes 492 are opened on the mounting bracket 49, wherein some of the frame fixing holes 492 are arranged around the frame through holes 491, and the fixing plate 45 is arranged on the corresponding frame hole. The fixing plate 45 is provided with a plate through hole 451 and a plate fixing hole 452, and the plate through hole 451 is for the flange of the pump body 471 around the drive shaft 472 to partially penetrate, and the pump body 471 is also provided with a plurality of pump fixing holes 4712, and the plurality of seat fixing holes include a pair of A first seat fixing hole 4422 and a pair of second seat fixing holes 4423, the fixing seat body 4421 includes a pair of recessed portions 44211 that are recessed obliquely from the first arc surface 4426 toward the adjacent card slot 4425 and a pair of fixing columns 44212 that are respectively opposite to the recessed portions 44211, the first seat fixing hole 4422 is arranged in the fixing column 44212 and communicates with the recessed portion 44211, the second seat fixing hole 4423 is arranged at two corners of the lower end of the fixing seat body 4421, a fixing piece is installed in each of the relative plate fixing hole 452 and the pump fixing hole 4712, a fixing piece is installed in each of the relative first seat fixing hole 4422, the plate fixing hole 452 and the pump fixing hole 4712, a fixing piece is installed in each of the relative plate fixing hole 452 and the frame fixing hole 492, and a fixing piece is installed in each of the relative second seat fixing hole 4423 and the frame fixing hole 492. In this embodiment, as shown in the figure, the top pair of fixing members is used to fix the fixing plate 45, the middle upper and lower pairs of fixing members are used to fix the pump body 471, the middle pair of fixing members relatively lower is also used to fix the fixing seat 442, and the bottom pair of fixing members is used to fix the fixing plate 45 and the fixing seat 442. In addition, it should be noted that in this specification, each fixing hole and each fixing member can be a threaded hole and a screw, respectively. Therefore, the pump body 471 of each pumping assembly and the corresponding fixing seat 442, fixing plate 45 and spring socket 443 are all reliably fixed on the mounting bracket 49.

[0045] Please refer to Figure 2 Specifically, relative to the vertical plane passing through the central axis of the driving shaft 472, a pair of abutting seats 4424, a pair of card slots 4425, a pair of accommodating slots 4432, a pair of abutting holes 4433, a pair of buckles 4434, a pair of slots 4427, a pair of protruding sliders 447, a pair of first seat fixing holes 4422 and a pair of second seat fixing holes 4423 are all symmetrically arranged. Therefore, the entire card seat assembly has a compact structure, reliable connection and high synchronization of the movement of the spring socket 443 relative to the fixing seat 442.

[0046] Please refer to Figure 7Preferably, the electrolyte detection module further comprises a displacement assembly corresponding to each pumping assembly, the displacement assembly comprises a driving motor (not shown) and a threaded rod (not shown) connected to the driving motor, the driving motor can drive the threaded rod to rotate in a first direction such as clockwise and a second direction such as counterclockwise, respectively, the spring socket body 4431 is provided with a groove portion 4437 and a connecting portion 4438 opposite to the groove portion 4437, the connecting portion 4438 is provided with a threaded hole (not shown), the driving motor is fixed on a side of the connecting portion away from the groove portion 4437, and the threaded rod is threadedly connected The grounding is inserted into the threaded hole, and the threaded rod can make telescopic movement relative to the groove portion 4437. Specifically, when the threaded rod drives the spring socket body 4431 to move toward the direction of the corresponding pump tube, that is, the direction of applying an increasing force to the corresponding pump tube, the length of the threaded rod extending into the groove portion 4437 is reduced, that is, the threaded rod retracts relative to the groove portion 4437; when the threaded rod drives the spring socket body 4431 to move away from the corresponding pump tube, that is, the direction of applying a decreasing force to the corresponding pump tube, the length of the threaded rod extending into the groove portion 4437 is increased, that is, the threaded rod extends relative to the groove portion 4437. The reagent package module is provided with a first flow rate detector and a second flow rate detector for detecting the outflow speed of the first calibration liquid and the second calibration liquid respectively, and a third flow rate detector for detecting the inflow speed of the waste liquid. Each flow rate detector can be a commonly used flow rate detector in the field. It can be known that each drive motor and each flow rate detector can communicate with each other correspondingly through wireless or wired means, and each drive motor generates a control signal according to the communication data, or each drive motor and each flow rate detector can communicate with the controller of the biochemical analyzer through wireless or wired means, and the controller generates a control signal to control the operation of each drive motor according to the communication data. The driving motor controls the rotation direction and number of revolutions of the threaded rod accordingly according to the flow velocity detection value measured by the corresponding flow velocity detector of the liquid pumped by its corresponding pumping component, so that the threaded rod drives the spring socket body 4431 to move along or against the direction of the elastic force to adjust the elastic abutment force applied by the spring socket to the corresponding pump tube. Specifically, when the flow velocity detection value is less than the first preset flow velocity value, the elastic abutment force of the pump tube may be too large due to accidental factors such as the manufacturing error of the elastic part, the installation error of the elastic part or the installation error of the pump tube. Therefore, the driving motor outputs a rotational force rotating in the first direction to cause the threaded rod to drive the spring socket body 4431 to move a certain distance in a parallel and opposite direction to overcome the elastic force of the elastic part, thereby reducing the elastic abutment force on the pump tube, so that the flow velocity detection value meets the preset flow velocity value.On the contrary, when the flow rate detection value is greater than the second preset flow rate value, generally speaking, the second preset flow rate value is greater than the first preset flow rate value by a preset percentage, then it is also possible that due to the above-mentioned accidental factors, the elastic contact force of the pump tube is too small, so that the threaded rod drives the elastic socket body 4431 to move a certain distance in a direction parallel to the elastic force of the elastic member by outputting a rotational force rotating in the second direction through the driving motor, so as to increase the elastic contact force on the pump tube, so that the flow rate detection value meets the second preset flow rate value. Therefore, by providing a displacement component capable of adjusting the elastic contact force on the corresponding pump tube for each pumping component, it is possible to avoid abnormal flow rate caused by excessive or too small elastic contact force caused by accidental factors, and further ensure that the corresponding pump tube can stably and evenly transport liquid. Please refer to it. Figure 1 , Figure 3 , Figure 4 and Fig.10Specifically, the mounting bracket 49 includes a first mounting plate 493, a second mounting plate 494, a third mounting plate 495 and a fourth mounting plate 496. The first mounting plate 493 extends in the horizontal direction. The second mounting plate 494 includes a connecting support plate 4941, a fixed support plate 4942 and a bent support plate 4943. The connecting support plate 4941 is preferably connected to the front edge of the first mounting plate 493 by extending vertically upward. The fixed support plate 4942 is connected to the connecting support plate 4941 and extends in a direction inclined at an acute angle toward the first mounting plate 493, so that the operating status of each pumping component can be observed conveniently. In addition, preferably, the acute angle value is specifically 45°, and each pumping component is vertically mounted on the first mounting plate 493. The bent support plate 4943 is connected to the inclined end of the fixed support plate 4942, and the bent support plate 4943 and the fixed support plate 4942 form an obtuse angle. The third mounting plate 495 is connected to the side of the first mounting plate 493 and preferably extends vertically upward. The fourth mounting plate 496 is connected to the extended end of the third mounting plate 495 and extends in a direction relatively away from the bent support plate 4943. A socket 4951 is provided on the third mounting plate 495, and a plug 49431 is provided on the side of the bent support plate 4943 and is plugged and fixed in the socket 4951. Therefore, the entire mounting bracket is stable and reliable, and the processing is simple. The third mounting plate 495 and the fourth mounting plate 496 are both provided with plate holes 497 corresponding to the shell holes of the housing 11, and the corresponding plate holes 497 and the shell holes are fixedly connected by fixing members. Therefore, the pump module 4 and the ion selective electrode module 1 are stably connected and fixed together, which improves the stability of the operation of both. The first mounting plate 493 is provided with a tilting piece 4932 having a locking hole 4931. The mounting bracket 49 is preferably made of metal material. The mounting bracket 49 is locked in position by a metal locking piece (not shown) fixed in the locking hole 4931 and the mounting bracket 49 and the housing 11 are grounded together. The common grounding should be directly connected to the main grounding point of the biochemical analyzer. The locking hole 4931 can be a threaded hole, and the metal locking piece can be a metal screw. Since electrical grounding is very important for the electrolyte detection module using ISE, when static electricity discharge enters the liquid, these voltage spikes will polarize the electrode 12, resulting in a large drift phenomenon. At this time, it may take a long time for the electrode 12 to return to normal. Moreover, due to the high impedance characteristics of the electrode 12, the noise spikes from the ground or power supply can easily infect the voltage signal of the sensor, and even a slight voltage spike will affect the detection result. Therefore, by grounding the mounting bracket 49 and the housing 11 together, the ion selective electrode module 1 and the pump module 4 are both grounded, so that the above-mentioned various adverse conditions caused by static electricity discharge entering the liquid will not occur.

[0047] As another purpose, a biochemical analyzer is provided, comprising any one of the above electrolyte detection modules. The electrolyte detection module can be assembled in the biochemical analyzer as a customized module, and the electrolyte detection module can communicate with the host of the biochemical analyzer through a serial port. The biochemical analyzer has the beneficial technical effects brought by any one of the above electrolyte detection modules, which will not be elaborated here. Therefore, the biochemical analyzer has the advantages of high detection accuracy and high reliability.

[0048] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A biochemical analyzer with an ion selective electrode module, characterized in that: include: An electrolyte detection module, the electrolyte detection module comprising: An ion selective electrode module comprises a housing and a plurality of electrodes arranged in the housing and sealed tightly against each other, wherein an electrode channel is formed between each of the electrodes; A sampling pool, which is arranged above the ion selective electrode module, and the sampling pool is provided with a first liquid inlet, a second liquid inlet and a sample inlet, and the sample inlet can receive a sample to be tested; A liquid detection box, which is arranged between the sampling pool and the ion selective electrode module, the sampling pool is connected to the electrode channel via the liquid detection box, and the liquid detection box detects the state of the liquid therein; A pump module comprising a first pumping assembly, a second pumping assembly and a third pumping assembly; A reagent pack module, comprising a first reagent pack storing a first calibration liquid, a second reagent pack storing a second calibration liquid and a waste liquid part for receiving waste liquid, wherein the liquid outlet of the first reagent pack is connected with the first liquid inlet through the first pump tube of the first pumping component, the liquid outlet of the second reagent pack is connected with the second liquid inlet through the second pump tube of the second pumping component, the waste liquid outlet of the ion selective electrode module relatively located downstream of the electrode channel is connected with the waste liquid inlet of the waste liquid part through the third pump tube of the third pumping component, the first calibration liquid, the second calibration liquid and the sample to be tested can pass through the electrode channel under the action of different pumping components respectively, and each pumping component comprises a holder component elastically abutting against the first pump tube, the second pump tube and the third pump tube respectively.

2. The biochemical analyzer with an ion selective electrode module according to claim 1, characterized in that: The pump module also includes a mounting bracket for mounting each pumping component, each pumping component includes a peristaltic pump and a rotating component, the peristaltic pump drives the rotating component to rotate, the base assembly includes an elastic member, a fixed seat and a spring socket, the fixed seat includes a fixed seat body and a plurality of seat fixing holes, a pair of abutting seats, a pair of card slots and a first arc surface provided on the fixed seat body, the spring socket includes a spring socket body and a pair of accommodating grooves, a pair of abutting holes, a pair of buckles and a second arc surface provided on the spring socket body, the abutting holes are provided at the top of the accommodating grooves, the elastic member is arranged in the accommodating grooves, the elastic member is elastically deformed and is located between the paired abutting seats and the abutting holes, the buckles and the card slots are snap-fitted in pairs, the spring socket can move up and down in the vertical direction under the elastic force of the elastic member, thereby applying an elastic abutting force to the corresponding pump tube located between the second arc surface and the rotating component, so that the corresponding pump tube stably and evenly transports liquid under the rotational force of the rotating component.

3. The biochemical analyzer with an ion selective electrode module according to claim 2, characterized in that: The abutment seat includes a convex plate with a circular arc convex surface and a convex block arranged on the convex plate and having a circular arc concave surface. The accommodating groove has a groove arc surface. The circular arc convex surface abuts against the groove arc surface in an adaptive manner. The abutment hole is set as a circular through hole. In the vertical direction, the projected edge of the circular arc concave surface overlaps with the projected edge of the abutment hole.

4. The biochemical analyzer with an ion selective electrode module according to claim 2, characterized in that: The peristaltic pump comprises a pump body and a driving shaft, the rotating assembly comprises a rotating disk, a plurality of roller assemblies and an end cover, the rotating disk is provided with a disk hole passing through its center line and a plurality of disk through holes uniformly distributed around the disk hole and having the same number as the roller assemblies, the roller assembly comprises a plug post and a roller, the roller is provided with a through hole, one end of the plug post is fixed in the disk through hole and the other end is protrudingly inserted in the through hole, the plurality of rollers of each rotating assembly are tangent to a common outer circle, and each of the rollers acts on the rotating disk in turn and reciprocatingly. The pump tube is provided with a force for liquid flow, the end cover includes a round cover body and a convex column with a column hole extending along the central axis of the round cover body, the drive shaft is fixed to the column hole through the disk hole, the diameter value of the round cover body and the outer diameter value of the turntable are both larger than the diameter value of the common outer circle, the end cover and the free end gaps of each of the plug columns are opposite, the turntable and the first arc surface have a common center and are spaced oppositely around the circumference, and the radial spacing value between the turntable and the first arc surface is larger than the diameter value of the pump tube acted upon by the roller.

5. The biochemical analyzer with ion selective electrode module according to claim 4, characterized in that: The fixing seat body is provided with a pair of slots respectively connected with the card slot, the slots are located above the card slot and extend in the vertical direction, a vertical surface of the slot is connected with a vertical surface of the slot, and in the horizontal direction, the width of the slot is greater than the width of the slot, the fixing seat is also provided with a protrusion protruding toward the card slot from the bottom of the slot, the protrusion is provided with a guide surface inclined from the slot to the card slot, the buckle is inserted into the slot and elastically deformed and snapped into the card slot under the guidance of the guide surface, the buckle can move in the length direction of the card slot in the vertical direction, and a pair of arc convex ribs are also arranged at intervals on the second arc surface of the spring socket body, and the pair of arc convex ribs limit the pump tube located therebetween in the radial direction.

6. The biochemical analyzer with an ion selective electrode module according to claim 5, characterized in that: A pair of protruding sliding blocks are provided on the surface of the spring socket body facing the fixed seat body, and the protruding sliding blocks are rectangular in the vertical direction. A concave portion is provided in the protruding sliding block. When the buckle and the slot are engaged with each other, the spring socket body and the fixed seat body are fitted with each other, and the protruding sliding blocks slide correspondingly on the outer sides of the adjacent slots and the slots of the fixed seat body, and the concave portion is communicated with the slots.

7. The biochemical analyzer with an ion selective electrode module according to claim 6, characterized in that: The pump module also includes a plurality of fixing plates, the fixing plates are provided with a pair of plate grooves, each plate groove is respectively fixed with a guide tube, one end of the pair of guide tubes are respectively connected to the two end pipe openings of a pump tube and the other end is respectively connected to the ion selective electrode module and the reagent package module via two liquid pipelines, the mounting bracket is provided with three frame through holes and a plurality of frame fixing holes, the fixing plates are arranged on the corresponding frame fixing holes, the fixing plates are provided with plate through holes and plate fixing holes, the plate through holes are for the flange part of the pump body surrounding the driving shaft to penetrate, the pump body is also provided with a plurality of pump fixing holes, the plurality of seat fixing holes include a pair of first seat fixing holes and a pair of second seat fixing holes, the fixed seat body includes a pair of recessed portions which are recessed by a first arc surface obliquely toward the adjacent slot direction and a pair of recessed portions which are respectively opposite to the recessed portions. The fixing column of the part, the first seat fixing hole is arranged in the fixing column and communicates with the recessed part, the second seat fixing hole is arranged at two corners of the lower end of the fixing seat body, a fixing piece is installed in each of the relative plate fixing hole and the pump fixing hole, a fixing piece is installed in each of the relative first seat fixing hole, the plate fixing hole and the pump fixing hole, a fixing piece is installed in each of the relative plate fixing hole and the frame fixing hole, and a fixing piece is installed in each of the relative second seat fixing hole and the frame fixing hole; relative to a vertical plane passing through the central axis of the drive shaft, the pair of abutting seats, the pair of card slots, the pair of accommodating slots, the pair of abutting holes, the pair of buckles, the pair of slots, the pair of protruding sliding blocks, the pair of first seat fixing holes and the pair of second seat fixing holes are symmetrically arranged.

8. The biochemical analyzer with an ion selective electrode module according to claim 3, characterized in that: The electrolyte detection module also includes a displacement assembly corresponding to each pumping assembly, the displacement assembly includes a driving motor and a threaded rod connected to the driving motor, the driving motor can drive the threaded rod to rotate in a first direction and a second direction respectively, the spring socket body is provided with a groove portion and a connecting portion opposite to the groove portion, the connecting portion is provided with a threaded hole, the driving motor is fixed on the side of the connecting portion away from the groove portion, the threaded rod is threadedly connected and penetrated in the threaded hole, the threaded rod can perform telescopic movement relative to the groove portion, the reagent package module is provided with a first flow rate detector and a second flow rate detector for detecting the outflow speed of the first calibration liquid and the second calibration liquid respectively, and a third flow rate detector for detecting the inflow speed of the waste liquid, the driving motor controls the rotation direction and the number of rotations of the threaded rod according to the flow rate detection value of the liquid pumped by the corresponding pumping assembly measured by the corresponding flow rate detector, so that the threaded rod drives the spring socket body to move along or against the direction of the elastic force, so as to adjust the elastic abutment force applied by the spring socket of the corresponding cartridge assembly to the corresponding pump tube.

9. The biochemical analyzer with an ion selective electrode module according to claim 8, characterized in that: The biochemical analyzer also includes a controller, and the drive motor and each flow velocity detector can communicate with the controller wirelessly or wiredly, and the controller can generate a control signal for controlling the operation of the drive motor according to the communication data; when the flow velocity detection value is less than a first preset flow velocity value, the control signal can control the drive motor to output a rotational force rotating along the first direction, so that the threaded rod drives the elastic socket body to move a certain distance in a parallel and opposite direction to overcome the elastic force of the elastic member, so that the flow velocity detection value meets the preset flow velocity value; when the flow velocity detection value is greater than a second preset flow velocity value, the control signal can control the drive motor to output a rotational force rotating along the second direction, so that the threaded rod drives the elastic socket body to move a certain distance in a direction parallel to the elastic force of the elastic member, so that the flow velocity detection value meets the preset flow velocity value; wherein, the second preset flow velocity value is greater than the first preset flow velocity value by a preset percentage.

10. The biochemical analyzer with an ion selective electrode module according to any one of claims 2 to 9, characterized in that: The mounting bracket includes a first mounting plate, a second mounting plate, a third mounting plate and a fourth mounting plate, the first mounting plate extending in a horizontal direction, the second mounting plate including a connecting support plate, a fixed support plate and a bent support plate, the connecting support plate is connected to the front edge of the first mounting plate and extends upward, the fixed support plate is connected to the connecting support plate and extends in a direction inclined at an acute angle toward the first mounting plate, the bent support plate is connected to the inclined end edge of the fixed support plate, an obtuse angle is formed between the bent support plate and the fixed support plate, the third mounting plate is connected to the side edge of the first mounting plate and extends upward, the fourth mounting plate is connected to the The extending ends of the third mounting plate are connected and extend in a direction relatively away from the bent support plate, the bent support plate is parallel to the fourth mounting plate, a socket is provided on the third mounting plate, a plug block which is plugged and fixed in the socket is provided on the side of the bent support plate, the third mounting plate and the fourth mounting plate are both provided with plate holes corresponding to the shell holes of the shell respectively, the corresponding plate holes and the shell holes are fixedly connected by fixing members, the first mounting plate is provided with a lift piece with a locking hole, the mounting bracket is locked in position by a metal locking member fixed in the locking hole and the mounting bracket and the shell are grounded together.

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