Quantitative blood sample adding device and sample adding and cleaning method

Abstract

The invention discloses a quantitative blood sample adding device and a sample adding and cleaning method.The quantitative blood sample adding device comprises a support, a first plunger pump, a second plunger pump, a first blood sensor, a second blood sensor, a first pinch valve, a second pinch valve, a third pinch valve, a fourth pinch valve and a confluence pool, the plunger pump provides power, the blood sensor accurately detects the sample size, and the pinch valve changes the sample preparation and cleaning process of the system. According to the device and the sample adding and cleaning method, by arranging the first blood sensor and the second blood sensor, the sampling amount of the sucked blood sample is accurately controlled, the detection error is reduced, and the detection precision is improved; through the cooperation of the two groups of plunger pump pinch valves, the residual blood sample and pure water in the tube can be removed, the detection error is prevented from being increased by the residual blood sample and pure water in the tube, and the detection precision is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a device for quantitatively adding a blood sample, as well as a method for adding a sample and cleaning the device. Background Art

[0002] In in vitro diagnostic instruments, the amount of blood sample taken is crucial for the entire detection process. If there is a serious deviation in the sampling amount, it will lead to inaccurate results and waste of blood. If there is not much residual blood in the test tube itself, too much residual blood in the tube during the extraction process will make it impossible to perform the test. There will be a small amount of residual cleaning liquid in the blood suction pipeline, which will flow into the front section of the blood sample during blood sampling, resulting in errors in the test results. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems raised in the above background art, and then a device for quantitatively adding a blood sample, as well as a method for adding a sample and cleaning the device are proposed. The disclosed device of the present invention precisely controls the sampling amount of the aspirated blood sample by setting a first blood sensor and a second blood sensor, reduces the detection error, and improves the detection accuracy. Through the cooperation of two sets of plunger pumps and pinch valves, the residual blood sample and pure water in the tube can be removed, avoiding the increase of the detection error caused by the residual blood sample and pure water in the tube, and further improving the detection accuracy.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0005] A device for quantitatively adding a blood sample includes a bracket, a first plunger pump and a pinch valve group installed on the bracket. The first plunger pump and the pinch valve group are connected through a delivery pipe group. It also includes a second plunger pump, a first blood sensor, a second blood sensor and a confluence pool installed on the bracket. The first plunger pump is arranged at the lower left front of the bracket, and the second plunger pump is arranged at the lower right front of the bracket. The first plunger pump and the second plunger pump provide power for the operation of the device, complete the work of aspirating and mixing the sample blood and the diluent, and at the same time complete the cleaning work of the device. The first blood sensor is arranged on the top surface of the bracket, and the second blood sensor is arranged on the right side of the bracket. The positions where the sample blood and the mixed detection liquid flow through are detected by the first blood sensor and the second blood sensor, so as to accurately control the sample aspiration amount. The confluence pool is arranged on the front of the bracket, above the first plunger pump. The first plunger pump, the second plunger pump, the first blood sensor, the second blood sensor, the pinch valve group and the confluence pool are connected through a delivery pipe group, and pipe valve connector groups are arranged at the connection points.

[0006] Preferably, the pinch valve group includes a first pinch valve, a second pinch valve, a third pinch valve, and a fourth pinch valve. The first pinch valve is arranged on the left side of the bracket, and the second pinch valve, the third pinch valve, and the fourth pinch valve are arranged on the front of the bracket, above the second plunger pump. The first blood sensor passes through the first delivery pipe. One end of the first delivery pipe is connected to the sample arm needle to aspirate sample blood through the sample arm needle, and the other end is connected to the first pinch valve. Then it is connected to the confluence pool through the second pipe valve joint. Above the confluence pool, it is connected to the third delivery pipe through the first pipe valve joint. The other end of the third delivery pipe is connected to the fourth delivery pipe through the ninth pipe valve joint. The other end of the fourth delivery pipe passes through the second blood sensor and is connected to the second delivery pipe. The other end of the second delivery pipe is connected to the first plunger pump through the fifth pipe valve joint. On the right side of the confluence pool, the fifth delivery pipe is fixed through the third pipe valve joint. After passing through the second pinch valve, the fifth delivery pipe is connected to the second plunger pump through the seventh pipe valve joint. On the front of the confluence pool, the seventh delivery pipe is fixed through the fourth pipe valve joint. After passing through the third pinch valve, the seventh delivery pipe is connected to the sampling seat. The prepared sample is transported into the erythrocyte sedimentation rate measuring tube through the sampling seat. On the side of the first plunger pump, the eighth delivery pipe is fixed through the sixth pipe valve joint. After passing through the fourth pinch valve, the eighth delivery pipe is connected to the waste discharge pipe. After the device is cleaned, the cleaning waste liquid is discharged through the waste discharge pipe. The second plunger pump fixes the sixth delivery pipe through the eighth pipe valve joint. After passing through the second pinch valve, the sixth delivery pipe is connected to the diluent storage. The diluent is transported to the confluence pool through the sixth delivery pipe.

[0007] Preferably, a barometric pressure sensor is further arranged on the top surface of the bracket. The barometric pressure sensor is connected to the fourth delivery pipe through the ninth delivery pipe, and a tenth pipe valve joint is arranged at the connection position to detect the pressure of the internal pipeline of the device in real time through the barometric pressure sensor, avoiding air leakage of the device and affecting the sample aspiration volume.

[0008] Preferably, an L-shaped bracket fixing plate is arranged at the bottom of the bracket to improve the fixing reliability of the bracket through the bracket fixing plate.

[0009] Preferably, a rotary fixing table is further included. Two rotary components are arranged inside the rotary fixing table. The two rotary components respectively fix the sampling seat and the extraction seat. A tenth delivery pipe is arranged above the extraction seat, and the other end of the tenth delivery pipe is connected to a diaphragm pump. The prepared sample is transported into the erythrocyte sedimentation rate measuring tube through the cooperation of the sampling seat and the extraction seat, and the diaphragm pump provides power to aspirate pure water to clean the internal pipeline of the device.

[0010] Preferably, the inner diameter of the third delivery pipe is larger than the inner diameters of the first delivery pipe and the fourth delivery pipe. The blood sample mixed with the diluent flows through the third delivery pipe, and variable diameter mixing is realized again in the third delivery pipe to fully mix the blood and the diluent, making the mixing of the diluent and the blood more sufficient.

[0011] Preferably, the first pinch valve, the third pinch valve, and the fourth pinch valve are single-tube pinch valves, and the second pinch valve is a double-tube pinch valve.

[0012] Preferably, it further includes a control device, which is electrically connected to the air pressure sensor, the first plunger pump, the second plunger pump, the first blood sensor, and the second blood sensor, making the device more intelligent and running more smoothly.

[0013] A sample adding method for a blood sample quantitative adding device includes the following steps:

[0014] S1. Close the third pinch valve and the fourth pinch valve, and open the first pinch valve and the second pinch valve;

[0015] S2. The sample arm needle penetrates through the test tube cap and enters the test tube. The first plunger pump operates to suck the sample blood. After the sample blood flows through the first blood sensor, the sample arm needle is lifted, and the first plunger pump continues to work. The sample blood reaches the confluence pool after flowing through the first pinch valve. At the same time, the second plunger pump starts to work. The sixth delivery tube extends into the diluent storage to extract the diluent. The diluent flows through the second pinch valve to the second plunger pump, and then is delivered to the confluence pool through the fifth delivery tube and the second pinch valve for preliminary mixing in the confluence pool;

[0016] S3. The preliminarily mixed sample moves upward under the action of the first plunger pump and the second plunger pump, passes through the third delivery tube and the fourth delivery tube to reach the second blood sensor. At this time, the first plunger pump and the second plunger pump stop working;

[0017] S4. The first pinch valve is closed, the third pinch valve is opened, and the first plunger pump starts to draw back. The prepared sample flows back, passes through the confluence pool and the third pinch valve, and flows through the seventh delivery tube through the sampling seat and is injected into the erythrocyte sedimentation rate measuring tube through the sampling seat. At this time, a quantitative sample adding process is completed.

[0018] A cleaning method for a blood sample quantitative adding device includes the following steps:

[0019] S1. The rotating component in the rotating table drives the sampling seat and the extraction seat to rotate to reach the cleaning position, as shown in the figure;

[0020] S2. The diaphragm pump is started to first extract the residual liquid in the device pipeline;

[0021] S3. After the residual extraction is completed, the sample arm needle is placed in pure water, and the diaphragm pump continues to work to extract pure water. The pure water passes through the first delivery tube, the first pinch valve, and the confluence pool. At the same time, the first plunger pump starts to work, and the pure water will flow upward and pass through the third delivery tube and the fourth delivery tube;

[0022] S4. The diaphragm pump continues to work. The pure water passes through the confluence tank, the seventh delivery pipe, and the third pinch valve, and is discharged into the sampling seat and the extraction seat, and finally discharged through the diaphragm pump.

[0023] S5. The diaphragm pump continuously works to extract pure water, and the first plunger pump works synchronously to repeatedly clean the third delivery pipe and the fourth delivery pipe three times to complete the cleaning work.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. By setting the first blood sensor and the second blood sensor, the disclosed device of the present invention can accurately control the sampling volume of the blood sample being aspirated, reduce the detection error, and improve the detection accuracy. Through the cooperation of two groups of plunger pump pinch valves, the residual blood sample and pure water in the pipe can be removed, avoiding the increase of the detection error caused by the residual blood sample and pure water in the pipe, and further improving the detection accuracy.

[0026] 2. By setting the air pressure sensor to detect the pressure in the internal pipeline of the device in real time, the disclosed device of the present invention can avoid the influence of air leakage of the device on the sample aspiration volume, further reduce the device error, and improve the detection accuracy.

[0027] 3. By setting the rotary fixing table, the extraction seat, and the diaphragm pump, the disclosed device of the present invention provides power for the device cleaning, speeds up the device cleaning rate, improves the work efficiency, and can also improve the cleaning effect, thereby improving the detection accuracy.

[0028] 4. In the disclosed device of the present invention, a third delivery pipe with a large background is provided. When the sample passes through, the channel diameter changes to mix evenly, so that the blood and the diluent are fully mixed, making the mixing of the diluent and the blood more sufficient, and thus improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a front structural schematic diagram of the disclosed device of the present invention;

[0030] Figure 2 is a back structural schematic diagram of the disclosed device of the present invention;

[0031] Figure 3 is a front perspective isometric schematic diagram of the disclosed device of the present invention;

[0032] Figure 4 is a structural schematic diagram of the rotary fixing table and its attached equipment of the disclosed device of the present invention.

[0033] Wherein: 1. Support; 101. Support fixing plate; 2. Air pressure sensor; 3. First plunger pump; 4. Second plunger pump; 5. First blood sensor; 6. Second blood sensor; 7. First pinch valve; 8. Second pinch valve; 9. Third pinch valve; 10. Fourth pinch valve; 11. Confluence pool; 12. Pipe valve joint group; 121. First pipe valve joint; 122. Second pipe valve joint; 123. Third pipe valve joint; 124. Fourth pipe valve joint; 125. Fifth pipe valve joint; 126. Sixth pipe valve joint; 127. Seventh pipe valve joint; 128. Eighth pipe valve joint; 129. Ninth pipe valve joint; 1210. Tenth pipe valve joint; 13. Delivery pipe group; 131. First delivery pipe; 132. Second delivery pipe; 133. Third delivery pipe; 134. Fourth delivery pipe; 135. Fifth delivery pipe; 136. Sixth delivery pipe; 137. Seventh delivery pipe; 138. Eighth delivery pipe; 139. Ninth delivery pipe; 1310. Tenth delivery pipe; 14. Rotary fixing table; 15. Sampling seat; 16. Extraction seat. Detailed implementation manners

[0034] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0035] Example 1, as Figures 1 - 4 shown, a blood sample quantitative sampling device includes a support 1, and a first plunger pump 3 and a pinch valve group installed on the support 1. The first plunger pump 3 and the pinch valve group are connected through a delivery pipe group 13. It also includes a second plunger pump 4, a first blood sensor 5, a second blood sensor 6 and a confluence pool 11 installed on the support 1. The first plunger pump 3 is arranged at the lower left front of the support 1, and the second plunger pump 4 is arranged at the lower right front of the support 1. The first plunger pump 3 and the second plunger pump 4 provide power for the device to work, complete the work of sucking and mixing sample blood and diluent, and at the same time complete the cleaning work of the device. The first blood sensor 5 is arranged on the top surface of the support 1, and the second blood sensor 6 is arranged on the right side of the support 1. The first blood sensor 5 and the second blood sensor 6 detect the positions where the sample blood and the mixed detection liquid flow through, so as to accurately control the sample suction volume. The confluence pool 11 is arranged on the front of the support 1, above the first plunger pump 3. The first plunger pump 3, the second plunger pump 4, the first blood sensor 5, the second blood sensor 6, the pinch valve group and the confluence pool 11 are connected through the delivery pipe group 13, and pipe valve joint groups 12 are arranged at the connection points.

[0036] The pinch valve group includes a first pinch valve 7, a second pinch valve 8, a third pinch valve 9, and a fourth pinch valve 10. The first pinch valve 7 is arranged on the left side of the bracket 1, and the second pinch valve 8, the third pinch valve 9, and the fourth pinch valve 10 are arranged on the front of the bracket 1, above the second plunger pump 4. The first blood sensor 5 passes through the first delivery pipe 131. One end of the first delivery pipe 131 is connected to the sample arm needle to aspirate sample blood through the sample arm needle, and the other end is connected to the first pinch valve 7, and then connected to the confluence pool 11 through the second pipe valve joint 122. Above the confluence pool 11, it is connected to the third delivery pipe 133 through the first pipe valve joint 121. The other end of the third delivery pipe 133 is connected to the fourth delivery pipe 134 through the ninth pipe valve joint 129. The other end of the fourth delivery pipe 134 passes through the second blood sensor 6 and is connected to the second delivery pipe 132. The other end of the second delivery pipe 132 is connected to the first plunger pump 3 through the fifth pipe valve joint 125. On the right side of the confluence pool 11, the fifth delivery pipe 135 is fixed through the third pipe valve joint 123. After passing through the second pinch valve 8, the fifth delivery pipe 135 is connected to the second plunger pump 4 through the seventh pipe valve joint 127. On the front of the confluence pool 11, the seventh delivery pipe 137 is fixed through the fourth pipe valve joint 124. After passing through the third pinch valve 9, the seventh delivery pipe 137 is connected to the sample adding seat 15. The prepared sample is delivered into the erythrocyte sedimentation rate measuring tube through the sample adding seat 15. On the side of the first plunger pump 3, the eighth delivery pipe 138 is fixed through the sixth pipe valve joint 126. After passing through the fourth pinch valve 10, the eighth delivery pipe 138 is connected to the waste discharge pipe. After the device is cleaned, the cleaning waste liquid is discharged through the waste discharge pipe. The second plunger pump 4 fixes the sixth delivery pipe 136 through the eighth pipe valve joint 128. After passing through the second pinch valve 8, the sixth delivery pipe 136 is connected to the diluent storage. The diluent is delivered to the confluence pool 11 through the sixth delivery pipe 136.

[0037] As Figure 4 shown, the disclosed device of the present invention further includes a rotary fixing table 14. Two rotary components are arranged inside the rotary fixing table 14, and the sample adding seat 15 and the extraction seat 16 are respectively fixed by the two rotary components. A tenth delivery pipe 1310 is arranged above the extraction seat 16, and the other end of the tenth delivery pipe 1310 is connected to a diaphragm pump. The prepared sample is delivered into the erythrocyte sedimentation rate measuring tube through the cooperation of the sample adding seat 15 and the extraction seat 16, and the diaphragm pump provides power to aspirate pure water for cleaning the internal pipelines of the device.

[0038] As Figure 1 and Figure 2 shown, the first pinch valve 7, the third pinch valve 9, and the fourth pinch valve 10 adopt single-tube pinch valves, and the second pinch valve 8 adopts a double-tube pinch valve.

[0039] Example 2. On the basis of the above example, a barometric pressure sensor 2 is further provided on the top surface of the bracket 1. The barometric pressure sensor 2 is connected to the fourth delivery pipe 134 through the ninth delivery pipe 139, and a tenth pipe valve joint 1210 is provided at the connection position. The pressure of the internal pipeline of the device is detected in real time by the barometric pressure sensor 2 to avoid air leakage of the device affecting the sample suction volume; an L-shaped bracket fixing plate 101 is provided at the bottom of the bracket 1 to improve the fixing reliability of the bracket 1 and the like.

[0040] Example 3. On the basis of the above example, the inner diameter of the third delivery pipe 133 is larger than the inner diameters of the first delivery pipe 131 and the fourth delivery pipe 134. The blood sample mixed with the diluent flows through the third delivery pipe 133, and variable diameter mixing is realized again in the third delivery pipe 133 to fully mix the blood and the diluent, making the mixing of the diluent and the blood more sufficient.

[0041] Example 4. On the basis of the above example, a control device is further included. The control device is electrically connected to the barometric pressure sensor 2, the first plunger pump 3, the second plunger pump 4, the first blood sensor 5, and the second blood sensor 6, making the device more intelligent and the operation smoother.

[0042] Example 5. The sampling method of a blood sample quantitative sampling device disclosed by the present invention is as follows:

[0043] S1. Close the third pinch valve 9 and the fourth pinch valve 10, and open the first pinch valve 7 and the second pinch valve 8;

[0044] S2. The sample arm needle penetrates through the test tube cap plug and enters the test tube. The first plunger pump 3 operates to suck the sample blood. After the sample blood flows through the first blood sensor 5, the sample arm needle is lifted, and the first plunger pump 3 continues to work. The sample blood reaches the confluence pool 11 after flowing through the first pinch valve 7. At the same time, the second plunger pump 4 starts to work. The sixth delivery pipe 136 extends into the diluent storage to extract the diluent. The diluent flows through the second pinch valve 8 to the second plunger pump 4, and then is delivered to the confluence pool 11 through the fifth delivery pipe 135 and the second pinch valve 8 for preliminary mixing;

[0045] S3. The preliminarily mixed sample moves upward under the action of the first plunger pump 3 and the second plunger pump 4, passes through the third delivery pipe 133 and the fourth delivery pipe 134 to reach the second blood sensor 6. At this time, the first plunger pump 3 and the second plunger pump 4 stop working;

[0046] In the above steps, the preliminarily mixed sample realizes variable diameter mixing again in the third delivery pipe 133 to fully mix the blood and the diluent, and the mixed sample completes secondary mixing.

[0047] S4. The first pinch valve 7 is closed, the third pinch valve 9 is opened, and the first plunger pump 3 starts the back-pumping operation. The prepared sample flows back, passes through the confluence tank 11 and the third pinch valve 9, and flows through the seventh delivery pipe 137 to the sampling seat 15, and is injected into the erythrocyte sedimentation rate measuring tube through the sampling seat 15. At this time, a quantitative sampling process is completed.

[0048] Embodiment Six. A cleaning method for a blood sample quantitative sampling device disclosed by the present invention is as follows:

[0049] S1. The rotation assembly in the rotary fixing table 14 drives the sampling seat 15 and the extraction seat 16 to rotate to reach the cleaning position, as Figure 4 shown;

[0050] S2. The diaphragm pump is started to first extract the residual liquid in the device pipeline;

[0051] S3. After the residual extraction is completed, the sample arm needle is placed in pure water, and the diaphragm pump continues to work to extract pure water. The pure water passes through the first delivery pipe 131, the first pinch valve 7 and the confluence tank 11. At the same time, the first plunger pump 3 starts to work, and the pure water will flow upward and pass through the third delivery pipe 133 and the fourth delivery pipe 134;

[0052] S4. The diaphragm pump continues to work, and the pure water passes through the confluence tank 11, the seventh delivery pipe 137 and the third pinch valve 9, and is discharged into the sampling seat 15 and the extraction seat 16, and finally discharged through the diaphragm pump;

[0053] S5. The diaphragm pump continuously works to extract pure water, and the first plunger pump 3 works synchronously to repeatedly clean the third delivery pipe 133 and the fourth delivery pipe 134 three times to complete the cleaning work.

[0054] In the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for describing the present invention rather than requiring the present invention to be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The "connected" and "connected" in the present invention should be understood in a broad sense. For example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0055] The above is the preferred operation mode of the present invention. The description of the specific operation mode is only for better understanding the idea of the present invention. For those of ordinary skill in the art, several improvements or equivalent replacements can also be made according to the principle of the present invention, and these improvements or equivalent replacements are also considered to fall within the protection scope of the present invention.

Claims

1. A blood sample quantitative adding device, comprising a support (1), and a first plunger pump (3) and a pinch valve assembly mounted on the support (1), wherein the first plunger pump (3) and the pinch valve assembly are connected via a delivery tube assembly (13), characterized in that: The invention also comprises a second plunger pump (4), a first blood sensor (5), a second blood sensor (6) and a confluence pool (11) mounted on the support (1); the first plunger pump (3) is arranged at the lower left of the front of the support (1); the second plunger pump (4) is arranged at the lower right of the front of the support (1); the first blood sensor (5) is arranged on the top of the support (1); the second blood sensor (6) is arranged on the right side of the support (1); the confluence pool (11) is arranged on the front of the support (1) and located above the first plunger pump (3); the first plunger pump (3), the second plunger pump (4), the first blood sensor (5), the second blood sensor (6), the clamping valve group and the confluence pool (11) are connected via a delivery pipe group (13); a pipe valve joint group (12) is arranged at the connection point.

2. A blood sample quantitative adding device according to claim 1, characterized in that: The clamp valve group comprises a first clamp valve (7), a second clamp valve (8), a third clamp valve (9) and a fourth clamp valve (10). The first clamp valve (7) is arranged on the left side of the bracket (1), the second clamp valve (8), the third clamp valve (9) and the fourth clamp valve (10) are arranged on the front side of the bracket (1) and are located above the second plunger pump (4). The first delivery tube (131) passes through the first blood sensor (5). One end of the first delivery tube (131) is connected to the sample arm needle, and the other end is connected to the first clamp valve (7). The first delivery tube (131) is then connected to the confluence pool (11) through the second tube valve joint (122). The confluence pool (11) is connected to the third delivery tube (133) through the first tube valve joint (121). The other end of the third delivery tube (133) is connected to the fourth delivery tube (134) through the ninth tube valve joint (129). The other end of the fourth delivery tube (134) passes through the second blood sensor (6) and is connected to the second delivery tube (132). The other end of the second delivery pipe (132) is connected to the first plunger pump (3) via a fifth pipe valve joint (125); the fifth delivery pipe (135) is fixed to the right side of the confluence pool (11) via a third pipe valve joint (123); the fifth delivery pipe (135) passes through the second pinch valve (8) and is connected to the second plunger pump (4) via a seventh pipe valve joint (127); the front side of the confluence pool (11) is fixed to the seventh delivery pipe (137) via a fourth pipe valve joint (124); The tube (137) passes through the third pinch valve (9) and is connected to the sample adding seat (15); the side of the first plunger pump (3) is fixed with the eighth delivery tube (138) through the sixth tube valve joint (126); the eighth delivery tube (138) passes through the fourth pinch valve (10) and is connected to the waste discharge pipe; the second plunger pump (4) is fixed with the sixth delivery tube (136) through the eighth tube valve joint (128); the sixth delivery tube (136) passes through the second pinch valve (8) and is connected to the diluent storage.

3. A blood sample quantitative adding device according to claim 2, characterized in that: An air pressure sensor (2) is also provided on the top surface of the support (1); the air pressure sensor (2) is connected to the fourth delivery pipe (134) via a ninth delivery pipe (139); a tenth pipe valve connector (1210) is provided at the connection position.

4. The blood sample quantitative adding device according to claim 2, characterized in that: An L-shaped bracket fixing plate (101) is provided at the bottom of the bracket (1).

5. The blood sample quantitative adding device according to claim 2, characterized in that: It also includes a rotating fixed platform (14), wherein two groups of rotating components are arranged inside the rotating fixed platform (14), and the two groups of rotating components respectively fix the sample adding seat (15) and the extraction seat (16), and a tenth delivery pipe (1310) is arranged above the extraction seat (16), and the other end of the tenth delivery pipe (1310) is connected to a diaphragm pump.

6. The blood sample quantitative adding device according to claim 2, characterized in that: The inner diameter of the third delivery pipe (133) is greater than the inner diameters of the first delivery pipe (131) and the fourth delivery pipe (134).

7. The blood sample quantitative adding device according to claim 2, characterized in that: The first pinch valve (7), the third pinch valve (9) and the fourth pinch valve (10) are single-tube pinch valves, and the second pinch valve (8) is a double-tube pinch valve.

8. The blood sample quantitative adding device according to claim 2, characterized in that: It also includes a control system, which is electrically connected to the air pressure sensor (2), the first plunger pump (3), the second plunger pump (4), the first blood sensor (5) and the second blood sensor (6).

9. A method for adding blood sample quantitative sample to a device, characterized in that A blood sample quantitative adding device according to any one of claims 1 to 8, comprising the following steps: S1, close the third pinch valve (9) and the fourth pinch valve (10), and open the first pinch valve (7) and the second pinch valve (8); S2, the sample arm needle passes through the test tube cap and enters the test tube, the first plunger pump (3) operates to absorb the sample blood, after the sample blood flows through the first blood sensor (5), the sample arm needle is lifted, the first plunger pump (3) continues to work, the sample blood flows through the first pinch valve (7) and reaches the confluence pool (11), at the same time, the second plunger pump (4) starts to work, the sixth delivery tube (136) extends into the diluent storage to extract the diluent, the diluent flows through the second pinch valve (8) to the second plunger pump (4), and then through the fifth delivery tube (135) and the second pinch valve (8) to the confluence pool (11), and is preliminarily mixed in the confluence pool (11); S3, the preliminary mixed sample moves upward under the action of the first plunger pump (3) and the second plunger pump (4), passes through the third delivery tube (133) and the fourth delivery tube (134) and reaches the second blood sensor (6), at which time the first plunger pump (3) and the second plunger pump (4) stop working; S4, the first pinch valve (7) is closed, the third pinch valve (9) is opened, the first plunger pump (3) starts to pump back, the prepared sample flows back, passes through the confluence pool (11) and the third pinch valve (9), flows through the seventh delivery tube (137) through the sample adding seat (15), and is injected into the erythrocyte sedimentation rate measuring tube through the sample adding seat (15), and a quantitative sample adding process is completed.

10. A method for cleaning a blood sample quantitative adding device, comprising the following steps: S1, the rotating assembly in the rotating fixed platform (14) drives the sample loading seat (15) and the extraction seat (16) to rotate to reach the cleaning position; S2, the diaphragm pump is started to extract the residual liquid in the device pipeline first; S3, after the residual extraction is completed, the sample arm needle is placed in the pure water, and the diaphragm pump continues to work to extract the pure water, and the pure water passes through the first delivery pipe (131), the first pinch valve (7) and the confluence pool (11). At the same time, the first plunger pump (3) starts to work, and the pure water flows upward, passing through the third delivery pipe (133) and the fourth delivery pipe (134); S4, the diaphragm pump continues to work, and the pure water passes through the confluence pool (11), the seventh delivery pipe (137) and the third pinch valve (9), and is discharged into the sample adding seat (15) and the extraction seat (16), and finally discharged through the diaphragm pump; S5, the diaphragm pump continues to work to extract pure water, and the first plunger pump (3) works synchronously to repeatedly clean the third delivery pipe (133) and the fourth delivery pipe (134) three times to complete the cleaning work.

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