Reaction cup for sample analyzer

Abstract

The utility model relates to the technical field of chemical analysis equipment, in particular to a reaction cup for a sample analyzer, which comprises a reaction cup body, and the surface roughness of the inner wall of the reaction cup body is Ra0.2-Ra6.3; the cup bottom of the reaction cup body is of a conical structure, and the conical angle of the cup bottom is 100-120 degrees; the reaction cup body is provided with the liquid inlet and the liquid outlet, the liquid inlet is located in the position, far away from the center shaft, of the conical surface of the cup bottom of the reaction cup body, after liquid is pumped away, no large bulk liquid is formed on the inner wall of the reaction cup, a thin liquid film is formed, and bulk water drop-shaped liquid residues cannot be observed. Therefore, after each emptying operation of the reaction cup, the liquid residual quantity difference of the reaction cup is reduced, the sample concentration difference is further reduced, and the test precision is improved. The problem that the measurement precision cannot meet the requirement due to different volumes and sizes of water-drop-shaped residual liquid clusters in the reaction cup is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical analysis equipment, in particular to a reaction cup used for a sample analyzer. Background Art

[0002] In sample analyzer equipment, such as a blood cell analyzer, the reaction cup usually repeatedly performs quantitative sample addition, signal measurement, cleaning, and emptying operations. The reaction cup is repeatedly used for sample measurement operations to achieve the purpose of fast, cost-controlled, and reliable results. Since signal measurement is involved, the corresponding quantitative sample addition, cleaning, and emptying need to be stable and reliable, with consistent effects, so that the sample concentration during measurement is controlled and the measurement precision of the system is more accurate. After the sample is added to the reaction cup, its final sample concentration is affected by the sample addition precision of the sample addition component and the amount of residual liquid in the reaction cup. For the reaction cup, whether the amount of residual liquid on the inner wall of the reaction cup after emptying is stable and whether the carryover contamination rate is controllable are important considerations in the design of the reaction cup.

[0003] Normally, the reaction cup is made of plastic that does not react with liquids, and the inner wall is as smooth as possible to reduce residue. The bottom is designed to be conical, semicircular, or other shapes that are conducive to the collection and outflow of liquids. There is a drain port at the bottom, which is connected to pipes, valves, pumps, and other components. When it is necessary to discharge, a negative pressure is formed at the drain port of the reaction cup, and the liquid flows out from the drain port. During actual use, a certain amount of liquid residue will form on the inner wall of the reaction cup, and the residual liquid is difficult to be completely emptied in a short time. In the case of being unable to empty, as long as the residual liquid each time is the same as the liquid composition used for the next reaction, and the residual amount each time is controlled within a very small error range, the precision requirement can be met.

[0004] In practice, it was found that for the same reaction cup, after multiple uses, cleaning and emptying, liquid sometimes remained in the reaction cup in the form of water droplets. This liquid mass was sometimes large, sometimes small, sometimes one mass, sometimes multiple. Ultimately, when the reaction cup was used for the next sample addition, the total amount of reaction liquid in the reaction cup varied greatly, making the measurement precision fail to meet the requirements. Utility Model Content

[0005] The utility model aims to provide a reaction cup for a sample analyzer, aiming to solve the problem that the volume of residual liquid groups in the reaction cup in the form of water drops is different, so that the measurement precision cannot meet the requirements.

[0006] To achieve the above-mentioned object, in a first aspect, the utility model provides a reaction cup for a sample analyzer, comprising a reaction cup body, wherein the surface roughness of the inner wall of the reaction cup body is Ra0.2-Ra6.3;

[0007] The bottom of the reaction cup body is a conical structure, and the conical angle of the bottom of the cup is 100°-120°;

[0008] The reaction cup body has a liquid inlet and a liquid outlet. The liquid inlet is located at a position of the conical surface of the cup bottom of the reaction cup body away from the central axis, and the liquid outlet is located at the central axis position of the cup bottom of the reaction cup body.

[0009] The reaction cup body is made of any one of acrylic, PVC, PSU and PP.

[0010] Wherein, the surface roughness of the inner wall of the reaction cup body is Ra3.2.

[0011] The reaction cup for the sample analyzer further comprises a two-way solenoid valve and a liquid discharge pump. The two-way solenoid valve is connected to the reaction cup body and is located at the liquid discharge port. The liquid discharge pump is connected to a side of the two-way solenoid valve away from the reaction cup body.

[0012] In which, the reaction cup for the sample analyzer also includes a clamping mechanism, which includes a base, a vertical rod, a rotating rod, a fastener, a U-shaped plate, two return springs, two sliding rods, two clamping plates and two friction pads. The vertical rod is fixedly connected to the base and is located at the top of the base. The rotating rod is rotatably connected to the vertical rod and passes through the rotating rod. The fastener is arranged at one end of the rotating rod. The U-shaped plate is fixedly connected to the rotating rod and is located on a side of the vertical rod away from the fastener. The two return springs are respectively fixedly connected to the U-shaped plate and are both located in the U-shaped plate. The two sliding rods are respectively fixedly connected to the two return springs and are respectively slidably connected to the U-shaped plate and are both located on the inner side wall of the U-shaped plate. The two clamping plates are respectively fixedly connected to the two sliding rods and are respectively located on both sides of the reaction cup body. The two friction pads are respectively fixedly connected to the two clamping plates and are in contact with the reaction cup body.

[0013] Wherein, the fastener comprises a nut and an anti-skid pad, wherein the nut is threadedly connected to the rotating rod and is located on the outer side wall of the rotating rod, and the anti-skid pad is fixedly connected to the nut and contacts the vertical pole.

[0014] In a second aspect, the utility model provides a method for processing the inner wall of a reaction cup for a sample analyzer, comprising the following steps:

[0015] Processing the bottom of the reaction cup body made of plastic material into a conical structure;

[0016] The surface roughness of the inner wall of the reaction cup body is processed to be Ra0.2-Ra6.3;

[0017] The liquid inlet is arranged at a position of the conical surface of the cup bottom of the reaction cup body away from the central axis, and the liquid discharge port is arranged at the central axis position of the cup bottom of the reaction cup body.

[0018] Wherein, the plastic material includes any one of acrylic, PVC, PSU and PP;

[0019] The cup bottom taper angle of the reaction cup body is 100°-120°;

[0020] The surface roughness of the inner wall of the reaction cup body is Ra3.2.

[0021] The method of machining the surface roughness of the inner wall of the reaction cup body to Ra0.2-Ra6.3 comprises:

[0022] The surface roughness of the inner wall of the reaction cup body is processed to Ra0.2-Ra6.3 by machining, grinding or polishing.

[0023] The utility model discloses a reaction cup for a sample analyzer, comprising a reaction cup body, the surface roughness of the inner wall of the reaction cup body being in the range of Ra0.2-Ra6.3; the bottom of the reaction cup body being in a conical structure, and the angle of the bottom cone being in the range of 100°-120°; the reaction cup body having a liquid inlet and a liquid outlet, the liquid inlet being located at a position where the conical surface of the bottom of the reaction cup body is away from the central axis, and the liquid outlet being located at the central axis position of the bottom of the reaction cup body, after the liquid is drawn away, a large mass of liquid will not be formed on the inner wall of the reaction cup, but a thin layer of liquid film will be formed, and no liquid residue in the form of water drops will be observed. In this way, after each emptying operation of the reaction cup, the difference in the amount of liquid residue in the reaction cup will be reduced, and thus the difference in sample concentration will be reduced, and the test precision will be improved. This solves the problem that the volume of the residual liquid mass in the form of water drops in the reaction cup is different, so that the measurement precision cannot meet the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The utility model is a schematic diagram of the structure of a reaction cup body of a reaction cup used in a sample analyzer.

[0026] Figure 2 It is a cross-sectional view of the reaction cup body, two-way solenoid valve and drainage pump.

[0027] Figure 3 It is a schematic diagram of the liquid clumping and adhering in the reaction cup body.

[0028] Figure 4 It is a schematic diagram of the uniform adhesion of the liquid surface in the reaction cup body.

[0029] Figure 5 It is a schematic diagram of the conical structure of the bottom of the reaction cup body.

[0030] Figure 6 It is a schematic diagram of the position of the liquid inlet of the reaction cup body.

[0031] Figure 7 is a schematic diagram of the vortex of liquid in the reaction cup body, where Figure 7 (A) is a top view of the vortex, and (B) is a front view of the vortex.

[0032] Figure 8 The utility model is a structural schematic diagram of a clamping mechanism for a reaction cup of a sample analyzer.

[0033] Fig. 9 The utility model is a cross-sectional view of a clamping mechanism for a reaction cup of a sample analyzer.

[0034] Fig.10 The utility model is a flow chart of a method for processing the inner wall of a reaction cup of a sample analyzer.

[0035] 1-reaction cup body, 2-liquid inlet, 3-liquid discharge port, 4-two-way solenoid valve, 5-liquid discharge pump, 6-clamping mechanism, 7-base, 8-vertical rod, 9-rotating rod, 10-fastener, 11-U-shaped plate, 12-reset spring, 13-sliding rod, 14-clamping plate, 15-friction pad, 16-nut, 17-anti-slip pad, 18-center axis. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] See also Figures 1 to 9 In a first aspect, the utility model provides a reaction cup for a sample analyzer, comprising a reaction cup body 1, wherein the surface roughness of the inner wall of the reaction cup body 1 is Ra0.2-Ra6.3;

[0038] The bottom of the reaction cup body 1 is a conical structure, and the conical angle of the bottom of the cup is 100°-120°;

[0039] The reaction cup body 1 has a liquid inlet 2 and a liquid outlet 3 . The liquid inlet 2 is located at a position of the conical surface of the cup bottom of the reaction cup body 1 away from the central axis 18 , and the liquid outlet 3 is located at the central axis 18 of the cup bottom of the reaction cup body 1 .

[0040] Specifically, the bottom of the reaction cup body 1 is a conical structure, and the angle of the bottom cone is 100°-120°, which is conducive to the collection and outflow of liquid. The material of the reaction cup body 1 is any one of acrylic, PVC, PSU and PP. The surface roughness of the inner wall of the reaction cup body 1 is Ra3.2. The liquid inlet 2 of the reaction cup body 1 is set at a position away from the central axis 18 on the conical surface of the bottom of the cup (such as Figure 6 As shown in FIG. 1 , when the liquid is injected into the reaction cup body 1 under pressure, the liquid can form a vortex shape inside the reaction cup body 1 (as shown in FIG. 1 ). Figure 7 As shown in the figure, the possibility of liquid splashing or bubble generation can be reduced, and the reliability and stability of the test results can be improved.

[0041] Furthermore, the reaction cup for the sample analyzer also includes a two-way solenoid valve 4 and a drainage pump 5. The two-way solenoid valve 4 is connected to the reaction cup body 1 and is located at the drainage port 3. The drainage pump 5 is connected to the side of the two-way solenoid valve 4 away from the reaction cup body 1.

[0042] Specifically, the two-way solenoid valve 4 is used to realize the connection and disconnection between the discharge port 3 at the bottom of the reaction cup body 1 and the discharge pump 5. When the liquid in the reaction cup body 1 is emptied, the two-way solenoid valve 4 connects the discharge port 3 with the discharge pump 5, and the discharge pump 5 draws the liquid in the reaction cup body 1 out through the discharge port 3.

[0043] Furthermore, the reaction cup for the sample analyzer also includes a clamping mechanism 6, which includes a base 7, a vertical rod 8, a rotating rod 9, a fastener 10, a U-shaped plate 11, two return springs 12, two slide bars 13, two clamping plates 14 and two friction pads 15. The vertical rod 8 is fixedly connected to the base 7 and is located at the top of the base 7. The rotating rod 9 is rotatably connected to the vertical rod 8 and passes through the rotating rod 9. The fastener 10 is arranged at one end of the rotating rod 9. The U-shaped plate 11 is fixedly connected to the rotating rod 9 and is located at the vertical rod 8. On the side of the rod 8 away from the fastener 10, the two return springs 12 are respectively fixedly connected to the U-shaped plate 11 and are both located inside the U-shaped plate 11. The two slide bars 13 are respectively fixedly connected to the two return springs 12 and are respectively slidably connected to the U-shaped plate 11 and are both located on the inner side wall of the U-shaped plate 11. The two clamps 14 are respectively fixedly connected to the two slide bars 13 and are respectively located on both sides of the reaction cup body 1. The two friction pads 15 are respectively fixedly connected to the two clamps 14 and are in contact with the reaction cup body 1. The fastener 10 includes a nut 16 and an anti-skid pad 17. The nut 16 is threadedly connected to the rotating rod 9 and is located on the outer side wall of the rotating rod 9. The anti-skid pad 17 is fixedly connected to the nut 16 and is in contact with the vertical rod 8.

[0044] Specifically, the vertical rod 8 is placed on the placement surface through the base 7. When the reaction cup body 1 is in use, the reaction cup body 1 is clamped by the clamping mechanism 6. Specifically, after the two sides of the reaction cup body 1 are respectively in contact with the two friction pads 15, the reaction cup body 1 is pushed toward the side close to the U-shaped plate 11 until the reaction cup body 1 enters the groove of the U-shaped plate 11. In this process, the reaction cup body 1 squeezes the slide bar 13 into the U-shaped plate 11 through the clamping plate 14 on the friction pad 15, so that the reset spring 12 is compressed. When the reaction cup body 1 enters the groove of the U-shaped plate 11, the rebound force of the reset spring 12 pushes the clamping plate 14 on the slide bar 13 close to the reaction cup body 1, so that the friction pad 15 on the clamping plate 14 is in close contact with the outer wall of the reaction cup body 1, thereby improving the clamping effect of the reaction cup body 1. In addition, by rotating the U-shaped plate 11, the U-shaped plate 11 rotates on the vertical rod 8 through the rotating rod 9, so that the angle of the reaction cup body 1 can be adjusted. After the adjustment is completed, the nut 16 is screwed so that the nut 16 is close to the vertical rod 8 through threaded engagement until the anti-slip pad 17 on the nut 16 contacts the vertical rod 8, thereby increasing the friction between the rotating rod 9 and the vertical rod 8, thereby achieving angle locking of the U-shaped plate 11.

[0045] See also Fig.10In a second aspect, the utility model provides a method for processing the inner wall of a reaction cup for a sample analyzer, comprising the following steps:

[0046] S1: Processing the bottom of the reaction cup body 1 made of plastic material into a conical structure;

[0047] Specifically, the plastic material includes any one of acrylic, PVC, PSU and PP; the cup bottom taper angle of the reaction cup body 1 is 100°-120°.

[0048] S2: machining the surface roughness of the inner wall of the reaction cup body 1 to Ra0.2-Ra6.3;

[0049] Specifically, the surface roughness of the inner wall of the reaction cup body 1 is processed to Ra0.2-Ra6.3 by mechanical processing, grinding or polishing. The surface roughness of the inner wall of the reaction cup body 1 is Ra3.2.

[0050] S3: the liquid inlet 2 is arranged at a position of the conical surface of the bottom of the reaction cup body 1 away from the central axis 18 , and the liquid discharge port 3 is arranged at a position of the central axis 18 of the bottom of the reaction cup body 1 .

[0051] Beneficial effects:

[0052] 1. The surface roughness of the inner surface of the reaction cup body 1 is controlled within the range of Ra0.2 to Ra6.3, such as Ra3.2. The difference in the residual liquid amount of the reaction cup will be reduced, and then the difference in sample concentration will be reduced, and the test precision will be improved.

[0053] 2. The conical structure of the bottom of the reaction cup body 1 and the conical angle range.

[0054] 3. The liquid inlet 2 of the reaction cup body 1 is arranged at a position away from the central axis 18 on the conical surface of the cup bottom.

[0055] The above disclosure is only a preferred embodiment of a reaction cup for a sample analyzer of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A reaction cup for a sample analyzer, characterized in that: It comprises a reaction cup body, wherein the surface roughness of the inner wall of the reaction cup body is Ra0.2-Ra6.3; The bottom of the reaction cup body is a conical structure, and the conical angle of the bottom of the cup is 100°-120°; The reaction cup body has a liquid inlet and a liquid outlet. The liquid inlet is located at a position of the conical surface of the cup bottom of the reaction cup body away from the central axis, and the liquid outlet is located at the central axis position of the cup bottom of the reaction cup body.

2. The cuvette for a sample analyzer according to claim 1, characterized in that: The reaction cup body is made of any one of acrylic, PVC, PSU and PP.

3. The cuvette for a sample analyzer as claimed in claim 2, characterized in that: The surface roughness of the inner wall of the reaction cup body is Ra3.

2.

4. The reaction cup for a sample analyzer as claimed in claim 3, characterized in that: The reaction cup for the sample analyzer further comprises a two-way solenoid valve and a liquid discharge pump. The two-way solenoid valve is communicated with the reaction cup body and is located at the liquid discharge port. The liquid discharge pump is communicated with a side of the two-way solenoid valve away from the reaction cup body.

5. The cuvette for a sample analyzer as claimed in claim 4, characterized in that: The reaction cup for the sample analyzer also includes a clamping mechanism, which includes a base, a vertical rod, a rotating rod, a fastener, a U-shaped plate, two return springs, two sliding rods, two clamping plates and two friction pads. The vertical rod is fixedly connected to the base and is located at the top of the base. The rotating rod is rotatably connected to the vertical rod and passes through the rotating rod. The fastener is arranged at one end of the rotating rod. The U-shaped plate is fixedly connected to the rotating rod and is located on a side of the vertical rod away from the fastener. The two return springs are respectively fixedly connected to the U-shaped plate and are both located in the U-shaped plate. The two sliding rods are respectively fixedly connected to the two return springs and are respectively slidably connected to the U-shaped plate and are both located on the inner side wall of the U-shaped plate. The two clamping plates are respectively fixedly connected to the two sliding rods and are respectively located on both sides of the reaction cup body. The two friction pads are respectively fixedly connected to the two clamping plates and are in contact with the reaction cup body.

6. The cuvette for a sample analyzer as claimed in claim 5, characterized in that: The fastener comprises a nut and an anti-skid pad. The nut is threadedly connected to the rotating rod and is located on the outer side wall of the rotating rod. The anti-skid pad is fixedly connected to the nut and contacts the vertical rod.

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