Vacuum blood collection tube sampling device

Abstract

The invention relates to a vacuum blood collection tube sampling device, which comprises a seat body, a sampling needle, an air-filling pipeline, a sampling pipeline and an air hole. An air-filling rubber valve is arranged between the air hole and the air-filling pipeline, and a sampling rubber valve is arranged between the air hole and the sampling pipeline. A control device for controlling the opening and closing of the air-filling rubber valve and the sampling rubber valve is arranged on one side of the seat body. The invention connects the air-filling pipeline with a valve, the sampling pipeline and the sampling needle, and arranges the air-filling hole to inflate the blood collection tube. First, the sampling rubber valve of the sampling pipeline is closed, and the air-filling rubber valve is opened to inflate the blood collection tube through the air hole to increase the pressure in the blood collection tube. After inflating for a period of time, the air is stopped, and then the sampling rubber valve and the air-filling rubber valve are opened at the same time. Under the action of the pressure, the blood in the blood collection tube flows back to the air-filling pipeline and the sampling pipeline. The air-filling rubber valve is closed and the sampling rubber valve is opened. Air is inflated again through the air hole, and the blood is blown out through the sampling port along the sampling pipeline.

Description

Technical Field

[0001] The invention relates to a vacuum blood collection tube sampling device. Background Art

[0002] Vacuum blood collection tubes are widely used in modern medicine. They are often used to collect human blood and then conduct a series of tests. In the actual testing process, it is necessary to take blood samples from the blood collection tubes multiple times. Currently, manual blood collection is used, which increases the risk of cross-infection. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a vacuum blood collection tube sampling device, which can discharge blood from the vacuum blood collection tube.

[0004] The technical solution adopted by the present invention is: a vacuum blood collection tube sampling device, which includes a seat body, a sampling needle arranged on the seat body for puncturing the blood collection tube, an inflation pipeline arranged on the seat body and connected with the sampling needle, a sampling pipeline connected with the inflation pipeline, and an air hole for inflating the inflation pipeline and the sampling pipeline, an inflation rubber valve is arranged between the air hole and the inflation pipeline, a sampling rubber valve is arranged between the air hole and the sampling pipeline, and a control device for controlling the opening and closing of the inflation rubber valve and the sampling rubber valve is arranged on one side of the seat body.

[0005] Furthermore, the inflation pipeline and the sampling pipeline are connected through an air supply pipeline, and the air hole is connected to the air supply pipeline.

[0006] Furthermore, the sampling pipeline includes a terminal pipeline and a middle pipeline, and the sampling rubber valve is arranged on the pipeline between the air hole and the middle pipeline.

[0007] Furthermore, the middle pipeline is in a continuous S shape.

[0008] Furthermore, a blind hole for placing a blood sampling tube is arranged on the upper end surface of the seat body, and the sampling needle is arranged at the bottom of the blind hole.

[0009] Furthermore, the control device includes a mounting plate, a sampling control connecting rod arranged on the mounting plate corresponding to the position of the sampling rubber valve and an inflation control connecting rod corresponding to the position of the inflation rubber valve, a lever device arranged on the mounting plate, and a driving device for pushing the lever device to reciprocate, and the sampling control connecting rod and the sampling rubber valve are respectively connected to the two ends of the lever device.

[0010] Furthermore, the lever device includes a lever seat arranged on the mounting plate and a lever connected to the lever seat through a rotating shaft, and the sampling control connecting rod and the inflation control connecting rod are respectively connected to the two ends of the lever through a rotating shaft; the driving device is a screw stepping motor, and its screw is connected to one end of the lever.

[0011] Furthermore, it also includes a holding device for clamping the seat body; the holding device includes an active clamping arm, a driven clamping arm and a servo, and mutually meshing gears are arranged between the active clamping arm and the driven clamping arm. The output shaft of the servo is connected to the active clamping arm to drive the active clamping arm to deflect.

[0012] Furthermore, a connecting rod is arranged between the active clamping arm and / or the driven clamping arm and the mounting plate, one end of the connecting rod is rotatably connected to the mounting plate, and the other end is rotatably connected to the active clamping arm and / or the driven clamping arm, and an air nozzle corresponding to the position of the air hole is arranged on the mounting plate.

[0013] Furthermore, the servo is arranged on a servo mounting seat, a connecting plate is fixedly arranged on the mounting plate, and the servo mounting seat is slidably connected to the connecting plate.

[0014] The positive effects of the present invention are as follows: the present invention connects the inflation pipeline with valves, the sampling pipeline and the sampling needle, and sets an inflation hole for inflation in the blood collection tube, first closes the sampling rubber valve of the sampling pipeline, opens the inflation rubber valve to inflate the blood collection tube through the air hole, so that the pressure in the blood collection tube increases, stops inflating after a period of inflation, and then opens the sampling rubber valve and the inflation rubber valve at the same time, and the blood in the blood collection tube flows back to the inflation pipeline and the sampling pipeline under the action of pressure, and then closes the inflation rubber valve and opens the sampling rubber valve, and inflates through the air hole again, and the blood will be blown out through the sampling port along the sampling pipeline. By inflating the blood collection tube to generate a pressure difference, the blood in the blood collection tube is reversely pressed out of the blood collection tube by the pressure difference, so as to realize the operation of sampling from the vacuum blood collection tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the connecting rod structure of the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of the lever device of the present invention;

[0018] Figure 4 It is a schematic diagram of the seat structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the sampling pipeline structure of the present invention;

[0020] Figure 6 Schematic diagram of the blind hole structure of the present invention. DETAILED DESCRIPTION

[0021] As attached Figure 1-6As shown, the present invention includes a seat body 1, a blind hole 10 located on the top of the seat body 1 for placing a vacuum blood collection tube, a sampling needle 9 is arranged in the blind hole 10, the blood collection tube is inserted upside down in the blind hole 10, and the sampling needle 9 pierces the blood collection tube to enter the interior thereof.

[0022] The seat body 1 is provided with an air filling pipeline 8 connected to the sampling needle 9 and a sampling pipeline connected to the air filling pipeline 8 through an air supply pipeline 11. The air supply pipeline 11 is connected with an air hole 3, and the air hole 3 is connected to the air pump to inject gas into the pipeline. The air pump should ensure that there is always a certain pressure at the air hole 3 to prevent blood from flowing into the air pump when it flows back. The two ends of the air supply pipeline 11 are respectively connected to the air filling pipeline 8 and the sampling pipeline. An air filling rubber valve 5 is provided on the pipeline connected to the air hole 3 and the air filling pipeline 8, and a sampling rubber valve 4 is provided on the pipeline connected to the air hole 3 and the sampling pipeline. A control device for controlling the opening and closing of the air filling rubber valve 5 and the sampling rubber valve 4 is provided on one side of the seat body 1.

[0023] In order to improve the airtightness of the air hole 3, a rubber air inlet is provided on the air hole 3, which has better sealing performance when it is connected to the air pump.

[0024] The sampling pipeline includes a continuous S-shaped middle pipeline 6 and a terminal pipeline 7 connected to the middle pipeline 6 at one end. The middle pipeline 6 is connected to the air supply pipeline 11. A sampling port 2 is arranged at the other end of the terminal pipeline 7. A liquid level sensor is arranged on the middle pipeline 6.

[0025] The sampling rubber valve 4, the inflation rubber valve 5 and the air hole 2 are located on the same side of the seat body 1. The control device includes a mounting plate 18 corresponding to the above-mentioned side, a sampling control connecting rod 23 arranged on the mounting plate 18 corresponding to the position of the sampling rubber valve 4 and an inflation control connecting rod 24 corresponding to the position of the inflation rubber valve 5, a lever device arranged on the mounting plate 18 and a driving device for pushing the lever device to reciprocate. The sampling control connecting rod 23 and the sampling rubber valve 4 are respectively connected to the two ends of the lever device. The opening and closing of the sampling rubber valve 4 and the inflation rubber valve 5 are controlled by the lever device, so that the two rubber valves can be opened at the same time, or one is opened and the other is closed.

[0026] The lever device comprises a lever seat 21 disposed on the mounting plate 18 and a lever 22 connected to the lever seat 21 via a rotating shaft, and the sampling control connecting rod 23 and the inflation control connecting rod 24 are respectively connected to both ends of the lever 22 via a rotating shaft;

[0027] The driving device is a screw stepper motor 15. Connecting plates 12 are provided on both sides of the mounting plate 18. The screw stepper motor 15 is mounted on the connecting plate 12, and its output screw is connected to one end of the lever 22. Under the action of the screw stepper motor 15, the lever 22 is reciprocated, so that the sampling control connecting rod 23 and the inflation control connecting rod 24 are in contact with or separated from the corresponding sampling rubber valve 4 and inflation rubber valve 5, so as to realize the opening and closing of the sampling rubber valve 4 and inflation rubber valve 5.

[0028] A holding device for clamping the seat body 1 is also provided on the connecting plate 12;

[0029] The holding device includes an active clamping arm 17 and a driven clamping arm 16 which are arranged opposite to each other, and a steering gear 14 for driving the active clamping arm 17 to deflect. Mutually meshing gear teeth are arranged between the active clamping arm 17 and the driven clamping arm 16. When the steering gear 14 drives the active clamping arm 17 to deflect, the two clamping arms will deflect inward or outward at the same time under the action of the meshing gear teeth.

[0030] A connecting rod 19 is provided between the active clamp arm 17 and / or the driven clamp arm 16 and the mounting plate 18, and the servo 14 is slidably provided on the connecting plate 12 through the servo mounting seat 13. One end of the connecting rod 19 is rotatably connected to the mounting plate 18, and the other end is rotatably connected to the active clamp arm 17 and / or the driven clamp arm 16. When the two clamp arms deflect inwards at the same time to clamp the seat body 1, the mounting plate 18 will move forward relative to the active clamp arm 17, and the distance between the mounting plate 18 and the seat body 1 will be reduced. The air nozzle 20 corresponding to the air hole 3 is provided on the mounting plate 18 to achieve a close fit between the air nozzle 20 and the air hole 3, and the air nozzle 20 is connected to the air pump. When the two clamp arms deflect outwards, the seat body 1 is released, and at this time, the mounting plate 18 moves backwards relatively to achieve separation from the seat body 1.

[0031] When the present invention is used, the vacuum blood collection tube is first inserted upside down into the blind hole 10, the sampling needle 9 is inserted into the blood collection tube, and then the steering gear 14 is turned on to move the two clamping arms inward to clamp the seat body 1. At the same time, the mounting plate 18 moves forward to match the air nozzle 20 with the air hole 3 to prepare for air supply.

[0032] Then, the screw stepper motor 15 is used to control the sampling control connecting rod 23 to move forward, and the sampling rubber valve 4 is pressed and closed. At this time, the inflation control connecting rod 24 moves backward, and the inflation rubber valve 5 is opened. The air pump is used to inflate the air hole 3. At this time, the air hole 3, the air supply pipeline 11, and the inflation pipeline 8 are connected, and the air is inflated into the blood sampling tube through the sampling needle 9, so that the pressure in the blood sampling tube 9 is greater than the external air pressure to form a pressure difference.

[0033] After inflation to a certain degree, inflation is stopped, and the sampling control connecting rod 23 retracts, so that the sampling rubber valve 4 is opened. At the same time, the inflation control connecting rod 24 does not contact the inflation rubber valve 5, and the inflation rubber valve 5 is also in an open state. At this time, the air supply pipeline 11, the inflation pipeline 8 and the sampling pipeline form a passage, and the inside of the blood collection tube is connected with the external atmosphere. Under the action of pressure, the blood in the blood collection tube flows into the inflation pipeline 8, the air supply pipeline 11 and the sampling pipeline through the sampling needle 9.

[0034] A liquid level detection port is provided at the lower end of the middle pipeline 6, and a sensor is corresponding to the liquid level detection port. When the blood reaches the liquid level detection port, the screw stepper motor 15 is used to control the inflation control connecting rod 24 to move forward, and the inflation rubber valve 5 is pressed and closed. At this time, the sampling rubber valve 4 is still in an open state. At this time, the air hole 3, the air supply pipeline 11 and the sampling pipeline form a passage. The air pump is turned on again to inflate the air hole 3, and the blood in the air supply pipeline 11 and the sampling pipeline will be discharged from the sampling port 2, completing the sampling work of the vacuum blood collection tube.

[0035] The present invention utilizes the pressure difference to discharge the blood from the blood sampling tube, and by controlling the pressure filled into the blood sampling tube, the sampling volume can be controlled within a certain range, thus realizing the automatic blood sampling operation.

[0036] 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 the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vacuum blood collection tube sampling device, characterized in that It comprises a seat body (1), a sampling needle (9) arranged on the seat body (1) for piercing a blood collection tube, an air filling pipeline (8) arranged on the seat body (1) and connected to the sampling needle (9), a sampling pipeline connected to the air filling pipeline (8), and an air hole (3) for filling the air filling pipeline (8) and the sampling pipeline, an air filling rubber valve (5) is arranged between the air hole (3) and the air filling pipeline (8), a sampling rubber valve (4) is arranged between the air hole (3) and the sampling pipeline, and a control device for controlling the opening and closing of the air filling rubber valve (5) and the sampling rubber valve (4) is arranged on one side of the seat body (1); The inflation pipeline (8) and the sampling pipeline are connected via an air supply pipeline (11), and the air hole (3) is connected to the air supply pipeline (11); The sampling pipeline comprises a terminal pipeline (7) and a middle pipeline (6), and the sampling rubber valve (4) is arranged on the pipeline between the air hole (3) and the middle pipeline (6); The middle pipeline (6) is in a continuous S shape; A blind hole (10) for placing a blood sampling tube is provided on the upper end surface of the base body (1), and the sampling needle (9) is arranged at the bottom of the blind hole (10); The control device comprises a mounting plate (18), a sampling control connecting rod (23) arranged on the mounting plate (18) and corresponding to the position of the sampling rubber valve (4), an inflation control connecting rod (24) corresponding to the position of the inflation rubber valve (5), a lever device arranged on the mounting plate (18), and a driving device for driving the lever device to reciprocate, the sampling control connecting rod (23) and the sampling rubber valve (4) being connected to two ends of the lever device respectively; The lever device comprises a lever seat (21) arranged on a mounting plate (18) and a lever (22) connected to the lever seat (21) via a rotating shaft, and the sampling control connecting rod (23) and the inflation control connecting rod (24) are respectively connected to two ends of the lever (22) via the rotating shaft; The driving device is a screw-type stepping motor (15), the screw of which is connected to one end of a lever (22); Also included is a holding device for clamping the seat body (1); The holding device comprises an active clamping arm (17), a driven clamping arm (16) and a steering gear (14); mutually meshing gear teeth are provided between the active clamping arm (17) and the driven clamping arm (16); an output shaft of the steering gear (14) is connected to the active clamping arm (17) to drive the active clamping arm (17) to deflect; A connecting rod (19) is provided between the active clamping arm (17) and / or the driven clamping arm (16) and the mounting plate (18); one end of the connecting rod (19) is rotatably connected to the mounting plate (18), and the other end is rotatably connected to the active clamping arm (17) and / or the driven clamping arm (16); and an air nozzle (20) corresponding to the position of the air hole (3) is provided on the mounting plate (18).

2. A vacuum blood collection tube sampling device according to claim 1, characterized in that The steering gear (14) is arranged on a steering gear mounting seat (13), a connecting plate (12) is fixedly arranged on the mounting plate (18), and the steering gear mounting seat (13) is slidably connected to the connecting plate (12).

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