Vacuum liquid suction device for blood coagulation analyzer

Abstract

The utility model discloses a vacuum liquid suction device for a blood coagulation analyzer, and relates to the technical field of blood coagulation analyzers, the vacuum liquid suction device comprises a sampling needle and a quantification assembly, the upper part of the outer wall of the sampling needle is connected with a hose, the quantification assembly is rotatably connected to the top of the sampling needle, a double-end motor is distributed on one side of a rotating outer cylinder in parallel, and the double-end motor is connected with the rotating outer cylinder. The bottom of the double-head motor is connected with a first lead screw, and an indicating ring is arranged at the bottom of the movable sleeve frame. According to the vacuum liquid suction device for the blood coagulation analyzer, the piston disc and the indication ring are synchronously driven by the double-head motor to ascend and descend, so that the sampling amount of each sampling needle is freely and accurately controlled, and the sampling needles do not influence each other when working by using the same vacuum pump; secondly, the scale indication groove in the surface of the indication ring is overlapped with a certain preset scale of the graduated scale on the outer surface of the sampling needle, so that the sampling amount required by the sampling needle can be intuitively displayed, and maintenance personnel can conveniently and regularly calibrate the double-head motor.

Description

Technical Field

[0001] The utility model relates to the technical field of coagulation analyzers, in particular to a vacuum liquid aspiration device used for coagulation analyzers. Background Art

[0002] In coagulation analysis, a certain amount of liquid needs to be extracted from the sample and transferred to the test tube or test plate of the analyzer for testing. In order to ensure that the liquid is transferred quantitatively each time, the sampling volume is often monitored and controlled by electronic valves, liquid level sensors and other components. The principle of the existing vacuum aspiration device for coagulation analyzers is to generate negative pressure in the sampling needle through a vacuum pump to extract samples, wherein the vacuum pump is connected to a number of sampling needles through an electronic valve and several hoses. A liquid level sensor is set inside each sampling needle to monitor the amount of liquid sample entering the sampling needle in real time, thereby ensuring that the amount of liquid sample in each sampling needle is the preset amount.

[0003] However, since both the liquid level sensor and the electronic valve are electronic devices, as the working cycle increases, they are inevitably prone to data errors or failures, and the sampling volume does not match the preset volume. At present, the electronic valve and liquid level sensor can only be calibrated regularly.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a vacuum liquid aspiration device for a coagulation analyzer is proposed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention provides a vacuum liquid aspiration device for a coagulation analyzer, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A vacuum liquid aspiration device for a coagulation analyzer, comprising a sampling needle and a quantitative component, wherein the upper portion of the outer wall of the sampling needle is connected to a hose, and the sampling needle is connected to a vacuum pump through the hose, and the quantitative component is rotatably connected to the top of the sampling needle, the quantitative component comprising a rotating outer cylinder, a double-headed motor, a first transmission belt, a threaded inner rod, a piston disk, an air hole, a penetration rod, a sealing plate, a first screw, a movable sleeve and an indicator ring, a double-headed motor is distributed parallel to one side of the rotating outer cylinder, and the top output end of the double-headed motor is transmission-connected to the bottom of the outer wall of the rotating outer cylinder through the first transmission belt, a threaded inner rod is provided inside the rotating outer cylinder, and a piston disk is provided at the bottom of the threaded inner rod, air holes are opened on the surface of the piston disk, and a penetration rod is penetrated inside the piston disk and the threaded inner rod, the bottom of the penetration rod is connected to the sealing plate, the bottom of the double-headed motor is connected to the first screw, and the outer wall of the first screw is sleeved with a movable sleeve, and the bottom of the movable sleeve is provided with an indicator ring.

[0007] Furthermore, the outer opening structural dimensions of the piston disk are adapted to the inner opening structural dimensions of the sampling needle, and the outer diameter of the sealing disk is smaller than the inner diameter of the sampling needle.

[0008] Furthermore, a scale is provided on the outer wall of the sampling needle, and an indicator ring is sleeved on the outer wall of the sampling needle.

[0009] Furthermore, a three-axial movable component is arranged parallel to one side of the bottom of the sampling needle, and the three-axial movable component includes a first motor, a transmission belt and a fixed seat. The output end surface of the first motor is connected to the transmission belt, and the upper surface of the transmission belt is distributed with a fixed seat.

[0010] Furthermore, the three-axial moving assembly also includes a second motor, a second screw rod and a body shell. The second motor is fixed to the rear end of the fixed seat, the output end of the second motor is connected to the second screw rod, and the surface of the second screw rod is provided with a body shell through a movable sleeve.

[0011] Furthermore, the three-axial moving assembly also includes a third motor and a third screw rod. The third motor is fixed to the inner wall of the body shell, and one side of the third motor is rotatably connected to the third screw rod at the bottom of the body shell.

[0012] Furthermore, the three-axial moving component also includes a second transmission belt, and the outer wall of the bottom of the third screw rod and the outer wall of the bottom output end of the third motor are both provided with a second transmission belt.

[0013] Furthermore, the triaxial movement assembly further includes a lifting sleeve, and the surface of the third screw rod is sleeved with the lifting sleeve.

[0014] Furthermore, the lifting sleeve passes through the side surface of the body shell, and the double-headed motor and the sampling needle are arranged through the outer end of the lifting sleeve.

[0015] Furthermore, the three-axial movement assembly also includes a limiting guide rod, the middle of the lifting sleeve passes through the limiting guide rod, and both ends of the limiting guide rod are fixedly connected to the inner wall of the body shell.

[0016] The utility model provides a vacuum liquid aspiration device for a coagulation analyzer, which has the following beneficial effects:

[0017] 1. This vacuum aspiration device for a coagulation analyzer uses a double-headed motor to synchronously drive the piston disk and indicator ring to rise and fall, thereby freely and accurately controlling the sampling volume of each sampling needle, and ensuring that the sampling needles do not affect each other when working with the same vacuum pump. Secondly, the scale indicator groove on the surface of the indicator ring coincides with a preset scale on the outer surface of the sampling needle, thereby intuitively displaying the amount of sampling required by the sampling needle, making it convenient for maintenance personnel to regularly calibrate the double-headed motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the transmission belt structure of a vacuum liquid aspiration device for a coagulation analyzer according to the present invention;

[0019] Figure 2 This is a schematic diagram of the external structure of the body shell of a vacuum liquid aspiration device for a coagulation analyzer according to the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of a body shell of a vacuum liquid aspiration device for a coagulation analyzer according to the present invention;

[0021] Figure 4 This is a schematic diagram of the appearance structure of a rotating outer cylinder of a vacuum liquid aspiration device for a coagulation analyzer according to the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the rotating outer cylinder of a vacuum liquid suction device for a coagulation analyzer in the utility model.

[0023] Figure 6 This is a schematic diagram of the structure of a piston disk of a vacuum liquid aspiration device for a coagulation analyzer according to the present invention;

[0024] Figure 7 The utility model is a schematic diagram of the sealing plate structure of a vacuum liquid aspiration device for a coagulation analyzer.

[0025] In the figure: 1. Sampling needle; 2. Hose; 3. Quantitative assembly; 301. Rotating outer cylinder; 302. Double-headed motor; 303. First transmission belt; 304. Threaded inner rod; 305. Piston disk; 306. Air hole; 307. Piercing rod; 308. Sealing disk; 309. First screw rod; 310. Moving sleeve; 311. Indicator ring; 4. Three-axial moving assembly; 401. First motor; 402. Transmission belt; 403. Fixed seat; 404. Second motor; 405. Second screw rod; 406. Body shell; 407. Third motor; 408. Third screw rod; 409. Second transmission belt; 410. Lifting sleeve; 411. Limiting guide rod. DETAILED DESCRIPTION

[0026] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] like Figure 1-Figure 7As shown, the utility model provides a technical solution: a vacuum liquid aspiration device for a coagulation analyzer, comprising a sampling needle 1 and a quantitative component 3, the upper portion of the outer wall of the sampling needle 1 is connected to a hose 2, and the sampling needle 1 is connected to a vacuum pump through the hose 2, the quantitative component 3 is rotatably connected to the top of the sampling needle 1, the quantitative component 3 comprises a rotating outer cylinder 301, a double-headed motor 302, a first transmission belt 303, a threaded inner rod 304, a piston disc 305, an air hole 306, a penetration rod 307, a sealing disc 308, a first screw rod 309, a movable sleeve 310 and an indicator ring 311, a double-headed motor 302 is distributed in parallel on one side of the rotating outer cylinder 301, and the top output end of the double-headed motor 302 is transmission-connected to the bottom of the outer wall of the rotating outer cylinder 301 through the first transmission belt 303, the rotating A threaded inner rod 304 is provided inside the outer cylinder 301, and a piston disk 305 is provided at the bottom of the threaded inner rod 304. An air hole 306 is opened on the surface of the piston disk 305, and a penetration rod 307 is penetrated by the piston disk 305 and the threaded inner rod 304. The bottom of the penetration rod 307 is connected to a sealing disk 308. The bottom of the double-headed motor 302 is connected to a first screw rod 309, and the outer wall of the first screw rod 309 is sleeved with a movable sleeve 310. The bottom of the movable sleeve 310 is provided with an indicator ring 311. The outer port structure size of the piston disk 305 is adapted to the inner port structure size of the sampling needle 1, and the outer diameter size of the sealing disk 308 is smaller than the inner diameter size of the sampling needle 1. The outer wall of the sampling needle 1 is provided with a scale, and the indicator ring 311 is sleeved on the outer wall of the sampling needle 1;

[0028] The specific operation is as follows: the connection method between the rotating outer cylinder 301 and the threaded inner rod 304 is consistent with the lipstick products on the market today. The internal paste can be screwed out or retracted by rotating the lipstick shell. Similarly, the double-headed motor 302 drives the first transmission belt 303 to rotate the outer cylinder 301, thereby extending the threaded inner rod 304 downward. At this time, the threaded inner rod 304 carries the piston disk 305 and descends along the inside of the sampling needle 1. A scale indicator groove is opened on the surface of the indicator ring 311, and as the double-headed motor 302 is started, it also drives the first screw rod 309 to rotate, causing the movable sleeve 310 to carry the indicator ring 311 and descend along the outer wall of the sampling needle 1, wherein the indicator ring 311 and the piston disk 305 are at the same height and rise and fall synchronously;

[0029] By aligning the scale indicator groove on the surface of the indicator ring 311 with a preset scale mark on the outer surface of the sampling needle 1, the amount of sampling required by the sampling needle 1 can be intuitively displayed, which facilitates maintenance personnel to regularly calibrate the double-headed motor 302 and can also intuitively display the sampling amount;

[0030] When sampling, the bottom end of the sampling needle 1 is inserted into the sample liquid. At this time, the vacuum pump extracts air inside each sampling needle 1, so that the liquid sample is extracted from the bottom to the top inside the sampling needle 1. As the liquid level inside the sampling needle 1 rises, the liquid level pushes the sealing plate 308 up, causing the penetration rod 307 to retract into the threaded inner rod 304, until the sealing plate 308 sticks to the bottom surface of the piston plate 305 and seals the air hole 306. At this time, it means that the sample liquid level inside the sampling needle 1 has reached the height of the scale indicator groove on the surface of the indicator ring 311. When several sampling needles 1 are extracting samples at the same time, after one sampling needle 1 reaches the sampling volume first, the air hole 306 is closed to prevent excessive liquid from rising. At the same time, the other sampling needles 1 can continue to operate until the sampling volume of all sampling needles 1 reaches the preset value.

[0031] Based on the above description, the present invention uses the double-headed motor 302 to synchronously drive the piston disk 305 and the indicator ring 311 to rise and fall, thereby freely and accurately controlling the sampling volume of each sampling needle 1, and making it possible for each sampling needle 1 to work without affecting each other when using the same vacuum pump. Secondly, the scale indicator groove on the surface of the indicator ring 311 coincides with a preset scale on the outer surface of the sampling needle 1, thereby intuitively displaying the amount of sampling required by the sampling needle 1, making it convenient for maintenance personnel to regularly calibrate the double-headed motor 302;

[0032] like Figure 1-Figure 7 As shown, a three-axial moving component 4 is arranged in parallel on one side of the bottom of the sampling needle 1, and the three-axial moving component 4 includes a first motor 401, a transmission belt 402 and a fixed seat 403. The output end surface of the first motor 401 is connected to the transmission belt 402, and the upper surface of the transmission belt 402 is distributed with a fixed seat 403. The three-axial moving component 4 also includes a second motor 404, a second screw rod 405 and a body shell 406. The rear end of the fixed seat 403 is fixed with the second motor 404, the output end of the second motor 404 is connected to the second screw rod 405, and the surface of the second screw rod 405 is provided with a body shell 406 through a movable sleeve. The three-axial moving component 4 also includes a third motor 407 and a third screw rod 408. The inner wall of the body shell 406 is fixed with a third motor Machine 407, and one side of the third motor 407 is rotatably connected to the third screw rod 408 at the bottom of the body shell 406, the three-axial moving component 4 also includes a second transmission belt 409, and the outer wall of the bottom outer wall of the third screw rod 408 and the outer wall of the bottom output end of the third motor 407 are both provided with a second transmission belt 409, the three-axial moving component 4 also includes a lifting sleeve 410, the surface of the third screw rod 408 is provided with a lifting sleeve 410, the lifting sleeve 410 passes through the side of the body shell 406, and the double-headed motor 302 and the sampling needle 1 are penetrated and arranged at the outer end of the lifting sleeve 410, the three-axial moving component 4 also includes a limiting guide rod 411, the middle of the lifting sleeve 410 passes through the limiting guide rod 411, and the two ends of the limiting guide rod 411 are fixedly connected to the inner wall of the body shell 406;

[0033] The specific operation is as follows: the sampling needle 1 needs to move during sampling in order to accurately sample the sample at the specified position. To this end, the first motor 401 drives the transmission belt 402 clockwise or counterclockwise to drive the sampling needle 1 to reciprocate along the surface of the transmission belt 402, and the second motor 404 drives the second screw rod 405 to rotate clockwise or counterclockwise to drive the body shell 406 to carry the sampling needle 1 to move back and forth along the surface of the fixed seat 403. The third motor 407 can also drive the second transmission belt 409 to rotate the third screw rod 408 clockwise or counterclockwise, so that the lifting sleeve 410 is lifted and lowered along the outer wall of the limiting guide rod 411, thereby causing the lifting sleeve 410 to lift and lower with the sampling needle 1, so that the sampling needle 1 can move in three axes: left and right, front and back, and up and down during the above operation, so that the sampling needle 1 can sample the sample at the specified position.

[0034] In summary, when the vacuum liquid aspiration device for the coagulation analyzer is used, the sampling needle 1 needs to be moved first during sampling to accurately sample the sample at the designated position. To this end, the transmission belt 402 is driven clockwise or counterclockwise by the first motor 401 to drive the sampling needle 1 to reciprocate along the surface of the transmission belt 402, and the second motor 404 drives the second screw rod 405 to rotate clockwise or counterclockwise to drive the body shell 406 to carry the sampling needle 1 to move back and forth along the surface of the fixed seat 403. The second transmission belt 409 can also be driven by the third motor 407 to rotate the third screw rod 408 clockwise or counterclockwise, so that the lifting sleeve 410 is lifted and lowered along the outer wall of the limiting guide rod 411, thereby making the lifting sleeve 410 carry the sampling needle 1 to lift and lower, so that the sampling needle 1 can move in three axes: left and right, front and back, and up and down during the above operation;

[0035] The double-headed motor 302 drives the first transmission belt 303 to rotate the outer cylinder 301, thereby extending the threaded inner rod 304 downward. At this time, the threaded inner rod 304 carries the piston disk 305 and descends along the inside of the sampling needle 1. The surface of the indicator ring 311 is provided with a scale indicator groove. As the double-headed motor 302 is started, it also drives the first screw rod 309 to rotate, causing the movable sleeve 310 to carry the indicator ring 311 and descend along the outer wall of the sampling needle 1. The indicator ring 311 and the piston disk 305 are at the same height and rise and fall synchronously.

[0036] The scale indicator groove on the surface of the indicator ring 311 coincides with a preset scale on the outer surface of the sampling needle 1, thereby intuitively displaying the amount of sampling that the sampling needle 1 needs to sample. When sampling, the bottom end of the sampling needle 1 is inserted into the sample liquid. At this time, the vacuum pump evacuates the inside of each sampling needle 1, so that the liquid sample is extracted from the inside of the sampling needle 1 from bottom to top. As the liquid level inside the sampling needle 1 rises, the liquid level pushes the sealing plate 308 up, causing the penetrating rod 307 to retract into the inside of the threaded inner rod 304, until the sealing plate 308 is attached to the inner rod 304. The bottom surface of the piston disk 305 closes the air hole 306, which means that the sample liquid level inside the sampling needle 1 has reached the height of the scale indicator groove on the surface of the indicator ring 311. When several sampling needles 1 are extracting samples at the same time, one sampling needle 1 reaches the sampling volume first because the air hole 306 is closed to prevent excessive liquid from rising. At the same time, the other sampling needles 1 can continue to operate until the sampling volume of all sampling needles 1 reaches the preset value. Then, the sampling needle 1 repeats the above movement operation to transfer the sample inside it to another designated position and discharge it;

[0037] When discharging the sample, the vacuum pump operates in reverse to inject a little air into the sampling needle 1 to release the vacuum state. At this time, the liquid sample and the sealing plate 308 fall due to gravity, causing the sample to be automatically discharged. The descending action of the sealing plate 308 can push the residual liquid to be discharged. At the same time, the rotation of the double-headed motor 302 can make the piston plate 305 descend to the bottom of the sampling needle 1 to further discharge the residual liquid sample inside the sampling needle 1.

[0038] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A vacuum aspiration device for a coagulation analyzer, comprising a sampling needle (1) and a quantitative component (3), characterized in that: The upper portion of the outer wall of the sampling needle (1) is connected to a hose (2), and the sampling needle (1) is connected to a vacuum pump via the hose (2). The quantitative component (3) is rotatably connected to the top of the sampling needle (1). The quantitative component (3) comprises a rotating outer cylinder (301), a double-headed motor (302), a first transmission belt (303), a threaded inner rod (304), a piston disc (305), an air hole (306), a penetration rod (307), a sealing disc (308), a first screw rod (309), a movable sleeve (310) and an indicator ring (311). A double-headed motor (302) is distributed in parallel on one side of the rotating outer cylinder (301), and the top output end of the double-headed motor (302) is connected to the rotating outer cylinder (301) via the first transmission belt (3 03) is in transmission connection with the bottom of the outer wall of the rotating outer cylinder (301), the interior of the rotating outer cylinder (301) is provided with a threaded inner rod (304), and the bottom of the threaded inner rod (304) is provided with a piston disc (305), the surface of the piston disc (305) is provided with an air hole (306), and the interiors of the piston disc (305) and the threaded inner rod (304) are penetrated by a penetration rod (307), the bottom of the penetration rod (307) is connected to a sealing plate (308), the bottom of the double-headed motor (302) is connected to a first screw rod (309), and the outer wall of the first screw rod (309) is provided with a movable sleeve (310), and the bottom of the movable sleeve (310) is provided with an indicator ring (311).

2. A vacuum liquid aspiration device for a coagulation analyzer according to claim 1, characterized in that: The outer opening structural dimensions of the piston disk (305) are compatible with the inner opening structural dimensions of the sampling needle (1), and the outer diameter of the sealing disk (308) is smaller than the inner diameter of the sampling needle (1).

3. The vacuum liquid aspiration device for a coagulation analyzer according to claim 1, characterized in that: The outer wall of the sampling needle (1) is provided with a scale, and the indicator ring (311) is sleeved on the outer wall of the sampling needle (1).

4. The vacuum liquid aspiration device for a coagulation analyzer according to claim 1, characterized in that: A three-axial moving assembly (4) is arranged in parallel on one side of the bottom of the sampling needle (1), and the three-axial moving assembly (4) comprises a first motor (401), a transmission belt (402) and a fixed seat (403). The output end surface of the first motor (401) is connected to the transmission belt (402), and the fixed seat (403) is distributed on the upper surface of the transmission belt (402).

5. A vacuum liquid aspiration device for a coagulation analyzer according to claim 4, characterized in that: The triaxial moving assembly (4) further comprises a second motor (404), a second screw rod (405) and a body shell (406); the second motor (404) is fixed to the rear end of the fixed seat (403); the output end of the second motor (404) is connected to the second screw rod (405); and the surface of the second screw rod (405) is provided with the body shell (406) via a movable sleeve.

6. The vacuum liquid aspiration device for a coagulation analyzer according to claim 5, characterized in that: The three-axial moving assembly (4) further comprises a third motor (407) and a third screw rod (408). The third motor (407) is fixed to the inner wall of the body shell (406), and one side of the third motor (407) is rotatably connected to the third screw rod (408) at the bottom of the body shell (406).

7. A vacuum liquid aspiration device for a coagulation analyzer according to claim 6, characterized in that: The triaxial moving assembly (4) further comprises a second transmission belt (409), and the second transmission belt (409) is provided on the outer wall of the bottom of the third screw rod (408) and the outer wall of the output end of the bottom of the third motor (407).

8. The vacuum liquid aspiration device for a coagulation analyzer according to claim 7, characterized in that: The triaxial moving assembly (4) further comprises a lifting sleeve (410), and the surface of the third screw rod (408) is sleeved with the lifting sleeve (410).

9. The vacuum liquid aspiration device for a coagulation analyzer according to claim 8, characterized in that: The lifting sleeve (410) passes through the side of the body shell (406), and the double-headed motor (302) and the sampling needle (1) are arranged through the outer end of the lifting sleeve (410).

10. The vacuum liquid aspiration device for a coagulation analyzer according to claim 8, characterized in that: The triaxial moving assembly (4) further includes a limiting guide rod (411), the middle portion of the lifting sleeve (410) passes through the limiting guide rod (411), and both ends of the limiting guide rod (411) are fixedly connected to the inner wall of the body shell (406).

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