Negative pressure suction pump for thrombus suction system

Abstract

The invention discloses a negative pressure suction pump for a thrombus suction system. The negative pressure suction pump comprises a control unit, a first negative pressure pump, a base, a rotating disc, a rotating disc driving unit, a collecting container, a lifting frame connected with the rotating disc through an electric lifting rod and a plurality of liquid receiving containers. A feeding pipe and an air outlet pipe are installed at the top end of the collecting container, and the air outlet pipe is connected with the first negative pressure pump through a first connecting pipe. The collecting container comprises an upper container and a lower container; an intercepting unit for intercepting thrombus is mounted in the collecting container. A motor mounting shell is arranged at the top end of the upper container, a filter screen motor is mounted in the motor mounting shell, the intercepting unit comprises a rotating plate, a first annular filter screen and a second annular filter screen surrounding the first annular filter screen, and the first annular filter screen and the second annular filter screen are both mounted at the rotating plate. According to the negative pressure suction pump, thrombus can be better sucked, and the thrombus and blood are separated and collected.

Description

Technical Field

[0001] This application relates to the field of medical devices, and particularly to a negative pressure suction pump for a thrombus aspiration system. Background Art

[0002] A thrombus aspiration device is a medical device used to remove thrombus in blood vessels, and is widely used in the treatment of deep vein thrombosis, peripheral arterial diseases, etc. Its core principle is to remove thrombus from blood vessels by negative pressure suction to restore blood flow. The thrombus aspiration device includes an aspiration catheter, a negative pressure source, a connecting pipeline, a collection container, etc., so that the aspiration catheter can be inserted into the blood vessel and the thrombus can be aspirated. When aspirating, the mixture of thrombus and blood can be drawn out of the blood vessel and into the collection tank, and in the collection tank, the thrombus and blood need to be separated, so that the thrombus can be used for subsequent pathological analysis.

[0003] However, when using a thrombus aspiration device, the mixture of thrombus and blood will enter the collection tank. Sometimes when the amount of aspirated blood is relatively large, the collection tank is easily filled, and it is very inconvenient to replace the collection tank. Moreover, the negative pressure is likely to change during the replacement process, which brings inconvenience to the aspiration of thrombus. Summary of the Invention

[0004] Object of the Invention: This application aims to overcome the defects of the prior art and provide a negative pressure suction pump for a thrombus aspiration system.

[0005] Technical Solution: A negative pressure suction pump includes a control unit, a first negative pressure pump, a base, a turntable, a turntable driving unit, a collection container, a lifting frame connected to the turntable through an electric lifting rod, and a plurality of liquid receiving containers; a feed pipe and an air outlet pipe are installed at the top of the collection container, and the air outlet pipe and the first negative pressure pump are connected through a first connecting pipe.

[0006] Further, the turntable driving unit is used to drive the turntable to rotate.

[0007] Further, a plurality of liquid receiving containers are fixed at the lifting frame.

[0008] Further, the collection container includes an upper container and a lower container; an intercepting unit for intercepting thrombus is installed in the collection container.

[0009] Further, the lower container is fixedly connected to the upper container.

[0010] Further, the lower container is fixedly connected to the upper container in a detachable manner.

[0011] Further, the upper container and the lower container are hermetically connected by screwing tightly.

[0012] Further, the top end of the upper container is provided with a motor mounting housing, and a filter screen motor is installed inside the motor mounting housing. The intercepting unit includes a rotating plate, a first annular filter screen, and a second annular filter screen surrounding the first annular filter screen. Both the first annular filter screen and the second annular filter screen are installed at the rotating plate.

[0013] Further, a rotating plate rotating shaft driven by the filter screen motor is fixed at the rotating plate.

[0014] Further, a bearing is installed between the rotating plate rotating shaft and the upper container.

[0015] Further, the filter holes of the second annular filter screen are smaller than those of the first annular filter screen.

[0016] Thus, if a thrombus leaks out from the first annular filter screen, it can still be intercepted by the second annular filter screen.

[0017] Further, the lower container includes a lower surrounding plate, a hopper, and a lower liquid pipe. Further, the liquid receiving container includes a circular bottom plate, an enclosing shell, a top plate, and a liquid receiving pipe fixedly connected to the top plate. The liquid receiving pipe can be inserted into the lower liquid pipe, and a sealing sleeve surrounding the liquid receiving pipe is provided at the liquid receiving pipe.

[0018] Further, the upper surrounding plate is in the shape of a circular cylinder.

[0019] Further, the hopper is fixedly connected to the lower surrounding plate and is in the shape of an inverted frustum.

[0020] Further, the lower liquid pipe is fixedly connected to the hopper.

[0021] Further, the enclosing shell is fixedly connected to the circular bottom plate and is in the shape of a circular cylinder.

[0022] Further, the top plate is fixedly connected to the enclosing shell and is in the shape of an inverted frustum.

[0023] The inverted frustum design of the top plate enables that if there is blood leakage when it falls from the lower liquid pipe, it will also fall on the top plate and will not contaminate other positions.

[0024] Further, it further includes a second negative pressure pump; there are a first annular protrusion and a first abutting ring on the liquid discharge pipe. The first annular protrusion is connected with a first sealing plug capable of abutting against the first abutting ring through a first spring. The liquid discharge pipe is also connected with a limiting sleeve through a plurality of radial rods. An air extraction channel communicating with the space inside the limiting sleeve is arranged in one of the radial rods. The limiting sleeve is also fixedly connected with an air extraction pipe. The air extraction pipe is connected with the second negative pressure pump through a second connecting pipe; there are a second annular protrusion and a second abutting ring on the liquid receiving pipe. The second annular protrusion is connected with a second sealing plug through a second spring. An insertion pipe capable of being inserted into the limiting sleeve is installed on the second sealing plug. A plurality of strip-shaped through grooves are arranged on the insertion pipe; a first air pressure sensor is installed on the collection container, and a second air pressure sensor is installed on the air extraction pipe; the liquid discharge pipe and the liquid receiving pipe can be in a first insertion state, a second insertion state, and a third insertion state. In the first insertion state, the insertion pipe is inserted into the limiting sleeve, and both the first sealing plug and the second sealing plug are in a closed state; in the second insertion state, the end of the insertion pipe abuts against the first sealing plug, the first sealing plug is in a closed state, and the second sealing plug is in an open state; in the third insertion state, the end of the insertion pipe abuts against the first sealing plug, the first sealing plug is in an open state, and the second sealing plug is in an open state.

[0025] The first spring requires a greater force than the second spring to be pressed and deformed. Thus, when the insertion pipe abuts against the first sealing plug, the second sealing plug moves downward first and thus opens. When the liquid receiving container continues to rise, the first spring is pressed by a greater force, so that the first sealing plug is pushed upward and thus opens.

[0026] Further, the air extraction channel can communicate with the strip-shaped through grooves.

[0027] Further, the number of the strip-shaped through grooves is greater than or equal to 4, and they are distributed at equal intervals in a ring shape.

[0028] Preferably, the number of the strip-shaped through grooves is greater than or equal to 8.

[0029] Thus, when the insertion pipe is inserted into the limiting sleeve and abuts against the first sealing plug, the air extraction channel communicates with at least one strip-shaped through groove.

[0030] Further, the first air pressure sensor is installed on the circular top plate.

[0031] Further, a first valve is installed on the air outlet pipe.

[0032] Further, a second valve is installed on the air extraction pipe.

[0033] Further, both the first valve and the second valve are solenoid valves, which are controlled by a control unit.

[0034] Further, it further includes a touch screen, and the touch screen is connected to the control unit.

[0035] Further, the first sealing plug has a first frustum-shaped abutting surface, and the first abutting ring has a second frustum-shaped abutting surface capable of abutting against the first frustum-shaped abutting surface.

[0036] Thus, better sealing can be achieved between the first sealing plug and the first abutting ring.

[0037] Further, the second sealing plug has a third frustum-shaped abutting surface, and the second abutting ring has a fourth frustum-shaped abutting surface capable of abutting against the third frustum-shaped abutting surface.

[0038] Thus, better sealing can be achieved between the second sealing plug and the second abutting ring.

[0039] Further, both the liquid receiving container and the collection container are made of transparent materials.

[0040] Thus, it is convenient to align and observe the interior.

[0041] Further, the lifting ring has a first mounting groove and a second mounting groove. A light emitter is installed in the first mounting groove, and a light receiver is installed in the second mounting groove.

[0042] Thus, it is more convenient to detect whether the blood in the liquid receiving container is almost full according to the light emitter and the light receiver, so as to facilitate the replacement operation of the liquid receiving container.

[0043] Further, the lifting frame includes a lifting plate and a plurality of lifting rings connected to the lifting plate. The plurality of lifting rings are evenly distributed at equal intervals in a ring shape. The lifting ring has internal threads, and the liquid receiving container has external threads capable of cooperating with the internal threads. The liquid receiving container has an annular limiting plate capable of abutting against the lifting ring.

[0044] Thus, it is convenient to install the liquid receiving container on the lifting frame and drive it to lift.

[0045] Further, the turntable has a plurality of limiting cylinders evenly distributed at equal intervals in a ring shape. The number of the limiting cylinders is equal to that of the liquid receiving containers and they correspond to each other one by one. Each liquid receiving container is inserted into a limiting cylinder, and a support spring with a top end capable of abutting against the liquid receiving container is installed on the turntable.

[0046] Further, the support spring is not connected to the liquid receiving container.

[0047] Thus, the lifting of the liquid receiving container can be limited and supported.

[0048] Further, it further includes an occlusion part. The occlusion part includes a plurality of surrounding rings distributed at equal intervals in a circular shape and a plurality of connecting seats distributed at equal intervals in a circular shape. The surrounding rings and the connecting seats are alternately distributed. One connecting seat is connected between two adjacent surrounding rings. The connecting seat has a connecting groove. There are two notch parts at the surrounding ring that communicate with the connecting groove. There is a sealing ring at the surrounding ring that can abut against the liquid receiving container.

[0049] Thus, when replacing the liquid receiving container, even if a small amount of blood drips, it will fall on the occlusion part and will not contaminate other positions, and the occlusion part is convenient to disassemble and clean.

[0050] Further, both the surrounding ring and the connecting seat have three.

[0051] Further, the sealing ring is made of rubber material.

[0052] Further, the air extraction pipe passes through the liquid discharge pipe and the lower surrounding plate.

[0053] Further, both the first connecting pipe and the second connecting pipe are flexible hoses.

[0054] Further, the outer side of the sealing sleeve can abut against the inner side of the liquid discharge pipe.

[0055] Thus, when the liquid receiving pipe is inserted into the liquid discharge pipe, sealing can be achieved between the two.

[0056] Further, the upper container includes a circular top plate and an annular cylindrical upper surrounding plate fixedly connected to the circular top plate. Both the feed pipe and the air outlet pipe are installed at the circular top plate.

[0057] Further, the collection container is installed at the base through a lifting mechanism. The lifting mechanism includes a lifting seat connected to the collection container, an L-shaped frame fixed to the base, a lead screw bearing installed at the base, a lead screw motor installed at the L-shaped frame, a lead screw connecting the lead screw motor and the lead screw bearing, and a vertical guide rail fixed to the L-shaped frame. The lifting seat has a threaded hole cooperating with the lead screw and a vertical sliding groove cooperating with the vertical guide rail.

[0058] Further, the lifting seat is connected to the lower surrounding plate.

[0059] Further, the limiting cylinder is annular cylindrical.

[0060] Further, the support spring can support the liquid receiving container, and the support spring and the liquid receiving container can be separated.

[0061] Further, the number of the limiting cylinder, the lifting ring and the liquid receiving container is three each.

[0062] Furthermore, an installation cavity is provided inside the base, the turntable driving unit is a driving motor installed inside the installation cavity, and the turntable can rotate relative to the base.

[0063] Furthermore, the turntable is connected to a turntable rotating shaft driven by the driving motor, and a rotating shaft bearing is connected between the turntable rotating shaft and the base.

[0064] Furthermore, an annular sliding groove is provided at the base, and a sliding block cooperating with the annular sliding groove is provided at the turntable.

[0065] Thus, the rotation of the turntable is more stable.

[0066] Advantageous effects: The negative pressure suction pump of the present application can be used for thrombus aspiration. And for the mixture of thrombus and blood at the aspiration site, since the liquid receiving container can be replaced, even if a relatively large amount of aspiration is encountered during the operation, there is enough accommodation volume to store the blood.

[0067] During the replacement process of multiple liquid receiving containers, the negative pressure can be kept stable, thus avoiding the inconvenience brought to the aspiration operation by the replacement operation.

[0068] The thrombus can be better separated, thus facilitating the subsequent removal of the thrombus for pathological analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 is a schematic diagram of the negative pressure suction pump; Figure 2 is an enlarged view of area A; Figure 3 is an enlarged view of area B; Figure 4 is a schematic diagram of the separation of the components of the negative pressure suction pump; Figure 5 is an enlarged view of area C; Figure 6 is an enlarged view of area D; Figure 7 is a schematic diagram of the negative pressure suction pump in the first plugged state; Figure 8 is an enlarged view of area E; Figure 9 is a schematic diagram of the negative pressure suction pump in the second plugged state; Figure 10 is an enlarged view of area F; Figure 11 is an enlarged view of area G; Figure 12 is a schematic diagram of the negative pressure suction pump in the third plugged state; Figure 13 is an enlarged view of area H; Figure 14 Schematic diagram of another angle of the negative pressure pump in the first plugging state; Figure 15 Schematic diagram of another angle of the negative pressure pump in the second plugging state; Figure 16 Schematic diagram of another angle of the negative pressure pump in the second plugging state.

[0070] Figure 17 Schematic diagram of the electric lifting rod driving the lifting frame to descend, so that the liquid receiving pipe and the liquid discharging pipe are separated, and thus the turntable can rotate.

[0071] For schematically showing the internal structure, Figures 7 - 16 In, a part of the collection container and one of the liquid receiving containers is cut away to show the cooperation between the liquid discharging pipe and the liquid receiving pipe; Figures 14 - 16 In, the shielding unit is removed to more clearly show the cooperation between the liquid discharging pipe and the liquid receiving pipe. Specific implementation manner

[0072] Reference numerals: 1 base; 2 turntable; 3 limiting cylinder; 3.1 support spring; 4.1 electric lifting rod; 4.2 lifting plate; 4.3 lifting ring; 4.4 first installation groove; 4.5 second installation groove; 4.6 internal thread; 5.1 L-shaped frame; 5.2 vertical guide rail; 5.3 lead screw; 5.4 lead screw bearing; 5.5 lifting seat; 5.6 lead screw motor; 6.1 surrounding ring; 6.2 connecting seat; 6.3 sealing ring; 7.1 liquid receiving container; 7.1.1 surrounding shell; 7.1.2 top plate; 7.2 circular limiting plate; 7.3 liquid receiving pipe; 7.4 second abutting ring; 7.4.1 fourth frustum-shaped abutting surface; 7.5 second annular protrusion; 7.6 second spring; 7.7 second sealing plug; 7.7.1 third frustum-shaped abutting surface; 7.8 insertion pipe; 7.9 strip-shaped through groove; 7.10 sealing sleeve; 8.1 upper container; 8.1.1 circular top plate; 8.1.2 upper surrounding plate; 8.1.3 motor mounting shell; 8.1.4 filter screen motor; 8.1.5 rotating plate rotating shaft; 8.1.6 rotating plate; 8.1.7 first annular filter screen; 8.1.8 second annular filter screen; 8.1.9 feed pipe; 8.1.10 air outlet pipe; 8.1.11 first air pressure sensor; 8.2 lower container; 8.2.1 lower surrounding plate; 8.2.2 hopper; 8.3 first annular protrusion; 8.4 first abutting ring; 8.4.1 second frustum-shaped abutting surface; 8.5 first sealing plug; 8.5.1 first frustum-shaped abutting surface; 8.6 first spring; 8.7 radial rod; 8.7.1 air extraction channel; 8.7.2 limiting sleeve; 8.8 liquid discharging pipe; 8.9 air extraction pipe; 8.10 second air pressure sensor; 9.1 First negative pressure pump; 9.2 Second negative pressure pump; As shown in the figure, a negative pressure suction pump for a thrombus aspiration system includes a control unit, a first negative pressure pump 9.1, a base 1, a turntable 2, a turntable drive unit for driving the turntable 2 to rotate, a collection container, a lifting frame connected to the turntable 2 through an electric lifting rod 4.1, and a plurality of liquid receiving containers 7.1 fixed at the lifting frame; a feed pipe 8.1.9 and an air outlet pipe 8.1.10 are installed at the top end of the collection container, and the air outlet pipe 8.1.10 and the first negative pressure pump 9.1 are connected through a first connecting pipe. The collection container includes an upper container 8.1 and a lower container 8.2 fixedly connected to the upper container 8.1 in a detachable manner; an interception unit for intercepting thrombus is installed in the collection container. The top end of the upper container 8.1 has a motor mounting shell 8.1.3, and a filter screen motor 8.1.4 is installed in the motor mounting shell 8.1.3. The interception unit includes a rotating plate 8.1.6, a first annular filter screen 8.1.7, and a second annular filter screen 8.1.8 surrounding the first annular filter screen 8.1.7. Both the first annular filter screen 8.1.7 and the second annular filter screen 8.1.8 are installed at the rotating plate 8.1.6, and a rotating plate rotating shaft 8.1.5 driven by the filter screen motor 8.1.4 is fixed at the rotating plate 8.1.6. The lower container 8.2 includes a circular cylindrical lower surrounding plate 8.2.1, an inverted frustum-shaped hopper 8.2.2 fixedly connected to the lower surrounding plate 8.2.1, and a lower liquid pipe 8.8 fixedly connected to the hopper 8.2.2. The liquid receiving container 7.1 includes a circular bottom plate, a circular cylindrical surrounding shell 7.1.1 fixedly connected to the circular bottom plate, an inverted frustum-shaped top plate 7.1.2 fixedly connected to the surrounding shell 7.1.1, and a liquid receiving pipe 7.3 fixedly connected to the top plate 7.1.2. The liquid receiving pipe 7.3 can be inserted into the lower liquid pipe 8.8, and a sealing sleeve 7.10 surrounding the liquid receiving pipe 7.3 is provided at the liquid receiving pipe 7.3.

[0073] The negative pressure suction pump further includes a second negative pressure pump 9.2; a first annular protrusion 8.3 and a first abutting ring 8.4 are provided at the lower liquid pipe 8.8, and the first annular protrusion 8.3 is connected by a first spring 8.6 to a first sealing plug 8.5 capable of abutting against the first abutting ring 8.4. A limiting sleeve 8.7.2 is connected to the lower liquid pipe 8.8 through a plurality of radial rods 8.7. An air extraction channel 8.7.1 communicating with the space inside the limiting sleeve 8.7.2 is provided in one of the radial rods 8.7. The limiting sleeve 8.7.2 is further fixedly connected to an air extraction pipe 8.9, and the air extraction pipe 8.9 is connected to the second negative pressure pump 9.2 through a second connecting pipe; a second annular protrusion 7.5 and a second abutting ring 7.4 are provided at the liquid receiving pipe 7.3, and the second annular protrusion 7.5 is connected by a second spring 7.6 to a second sealing plug 7.7. An insertion pipe 7.8 capable of being inserted into the limiting sleeve 8.7.2 is installed at the second sealing plug 7.7, and a plurality of strip-shaped through grooves 7.9 are provided at the insertion pipe 7.8; a first air pressure sensor 8.1.11 is installed at the collection container, and a second air pressure sensor 8.10 is installed at the air extraction pipe 8.9; the lower liquid pipe 8.8 and the liquid receiving pipe 7.3 can be in a first insertion state, a second insertion state, and a third insertion state. In the first insertion state, the insertion pipe 7.8 is inserted into the limiting sleeve 8.7.2, and both the first sealing plug 8.5 and the second sealing plug 7.7 are in a closed state; in the second insertion state, the end of the insertion pipe 7.8 abuts against the first sealing plug 8.5, the first sealing plug 8.5 is in a closed state, and the second sealing plug 7.7 is in an open state; in the third insertion state, the end of the insertion pipe 7.8 abuts against the first sealing plug 8.5, the first sealing plug 8.5 is in an open state, and the second sealing plug 7.7 is in an open state.

[0074] The first sealing plug 8.5 has a first frustum-shaped abutting surface 8.5.1, and the first abutting ring 8.4 has a second frustum-shaped abutting surface 8.4.1 capable of abutting against the first frustum-shaped abutting surface 8.5.1; the second sealing plug 7.7 has a third frustum-shaped abutting surface 7.7.1, and the second abutting ring 7.4 has a fourth frustum-shaped abutting surface 7.4.1 capable of abutting against the third frustum-shaped abutting surface 7.7.1. Both the liquid receiving container and the collection container are made of transparent materials; at the lifting ring 4.3, there are a first installation groove 4.4 and a second installation groove 4.5. A light emitter is installed in the first installation groove 4.4, and a light receiver is installed in the second installation groove 4.5. The lifting frame includes a lifting plate 4.2 and a plurality of lifting rings 4.3 connected to the lifting plate 4.2. The plurality of lifting rings 4.3 are evenly distributed at equal intervals in a ring shape. The lifting ring 4.3 has an internal thread 4.6, and the liquid receiving container 7.1 has an external thread capable of cooperating with the internal thread 4.6. The liquid receiving container 7.1 has an annular limiting plate 7.2 capable of abutting against the lifting ring 4.3; at the turntable 2, there are a plurality of limiting cylinders 3 evenly distributed at equal intervals in a ring shape. The number of the limiting cylinders 3 is equal to that of the liquid receiving containers 7.1 and they correspond to each other one by one. Each liquid receiving container 7.1 is inserted into a limiting cylinder 3, and a support spring 3.1 whose top end can abut against the liquid receiving container 7.1 is installed at the turntable 2.

[0075] The negative pressure suction pump further includes a shielding part. The shielding part includes a plurality of surrounding rings 6.1 evenly distributed at equal intervals in a ring shape and a plurality of connecting seats 6.2 evenly distributed at equal intervals in a ring shape. The surrounding rings 6.1 and the connecting seats 6.2 are alternately distributed. One connecting seat 6.2 is connected between two adjacent surrounding rings 6.1. The connecting seat has a connecting groove. The surrounding ring has two notch parts communicating with the connecting groove. The surrounding ring has a sealing ring 6.3 capable of abutting against the liquid receiving container 7.1. The upper container 8.1 includes a circular top plate 8.1.1 and an annular cylindrical upper surrounding plate 8.1.2 fixedly connected to the circular top plate 8.1.1. The feed pipe 8.1.9 and the air outlet pipe 8.1.10 are both installed at the circular top plate 8.1.1; the collection container is installed at the base 1 through a lifting mechanism. The lifting mechanism includes a lifting seat 5.5 connected to the collection container, an L-shaped frame 5.1 fixed to the base 1, a screw rod bearing 5.4 installed at the base 1, a screw rod motor 5.6 installed at the L-shaped frame 5.1, a screw rod 5.3 connecting the screw rod motor 5.6 and the screw rod bearing 5.4, and a vertical guide rail 5.2 fixed to the L-shaped frame 5.1. The lifting seat 5.5 has a threaded hole cooperating with the screw rod 5.2 and a vertical sliding groove cooperating with the vertical guide rail 5.2.

[0076] For the negative pressure suction pump of the present application, the upper container and the lower container of the collection container can be separated, and the liquid receiving container can be removed from the lifting ring. This facilitates flexible use and installation. After normal installation, during use, the collection container can be evacuated by the first negative pressure pump through the air outlet pipe, thereby achieving negative pressure, and the negative pressure of the collection container enables the thrombus in the blood vessel to be aspirated into the aspiration catheter. During normal use, there is a liquid receiving container below the collection container, and the liquid receiving pipe of the liquid receiving container is inserted into the lower liquid pipe of the collection container, and the insertion tube abuts against the first sealing plug. The lower liquid pipe and the liquid receiving pipe are in the third plugging state, and both the first sealing plug and the second sealing plug are in the open state. Thus, when the mixture of thrombus and blood enters the collection container, the thrombus will be intercepted by the interception unit. Under the action of centrifugal force and the interception of two filters, the thrombus can be better intercepted. And the blood after separating the thrombus can enter the liquid receiving pipe from the lower part of the lower liquid pipe and flow into the liquid receiving container. And due to the presence of the light emitter and the light receiver, when the liquid level in the liquid receiving container reaches the height where the light emitter is located, it can be monitored, indicating that the liquid receiving container is almost full. At this time, driven by the electric lifting rod, the lifting frame can descend, so that the liquid receiving pipe can be detached from the lower liquid pipe, and the first sealing plug and the second sealing plug are restored to the sealed state. Then the turntable rotates (during this process, the aspiration operation can be paused or continued. If it continues, the aspirated blood can be temporarily stored in the collection container), so that the unused liquid receiving container is located below the collection container. Then the electric push rod raises the lifting frame, and the liquid receiving pipe is inserted into the lower liquid pipe, and the insertion tube abuts against the first sealing plug, causing the second sealing plug to open (at this time, the first sealing plug is still in the closed state, and the lower liquid pipe and the liquid receiving pipe are in the second plugging state). At this time, the second negative pressure pump is turned on to evacuate the liquid receiving container, so that the liquid receiving container becomes negative pressure. When the pressure in the liquid receiving container is equal to the air pressure in the collection container, the electric push rod causes the lifting frame to continue to rise, so that the first sealing plug is also opened (the lower liquid pipe and the liquid receiving pipe are in the third plugging state). Thus, the blood in the collection container can flow down into the liquid receiving container, and since the air pressure in the collection container and the liquid receiving container is approximately equal when the first sealing plug is opened, it will not cause sudden pressure changes to bring inconvenience to the aspiration operation.

[0077] Although the present invention has been illustrated and described with respect to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention as long as they do not exceed the scope defined by the claims of the present invention.

Claims

1. A negative pressure suction pump for a thrombus aspiration system, characterized in that, It includes a control unit, a first negative pressure pump, a base, a turntable, a turntable drive unit, a collection container, a lifting frame connected to the turntable by an electric lifting rod, and a plurality of liquid receiving containers; a feed pipe and an air outlet pipe are installed at the top of the collection container, and the air outlet pipe and the first negative pressure pump are connected by a first connecting pipe.

2. The negative pressure suction pump for a thrombus aspiration system according to claim 1, wherein, The collection container includes an upper container and a lower container; an intercepting unit for intercepting thrombus is installed in the collection container.

3. The negative pressure suction pump for a thrombus aspiration system according to claim 2, characterized in that, The top of the upper container has a motor mounting shell, and a filter screen motor is installed in the motor mounting shell. The intercepting unit includes a rotating plate, a first annular filter screen, and a second annular filter screen surrounding the first annular filter screen. Both the first annular filter screen and the second annular filter screen are installed at the rotating plate.

4. The negative pressure suction pump for a thrombus aspiration system according to claim 2, wherein, The lower container includes a lower surrounding plate, a hopper, and a lower liquid pipe; the liquid receiving container includes a circular bottom plate, a surrounding shell, a top plate, and a liquid receiving pipe fixedly connected to the top plate. The liquid receiving pipe can be inserted into the lower liquid pipe, and a sealing sleeve surrounding the liquid receiving pipe is provided at the liquid receiving pipe.

5. The negative pressure suction pump for a thrombus aspiration system according to claim 4, characterized in that, It further includes a second negative pressure pump; the lower liquid pipe has a first annular protrusion and a first abutting ring. The first annular protrusion is connected by a first spring to a first sealing plug capable of abutting the first abutting ring. The lower liquid pipe is also connected by a plurality of radial rods to a limiting sleeve. An air extraction channel communicating with the space inside the limiting sleeve is provided in one of the radial rods. The limiting sleeve is also fixedly connected to an air extraction pipe. The air extraction pipe is connected to the second negative pressure pump through a second connecting pipe; the liquid receiving pipe has a second annular protrusion and a second abutting ring. The second annular protrusion is connected by a second spring to a second sealing plug. An insertion pipe capable of being inserted into the limiting sleeve is installed at the second sealing plug. A plurality of strip-shaped through grooves are provided at the insertion pipe; a first air pressure sensor is installed at the collection container, and a second air pressure sensor is installed at the air extraction pipe; the lower liquid pipe and the liquid receiving pipe can be in a first insertion state, a second insertion state, and a third insertion state. In the first insertion state, the insertion pipe is inserted into the limiting sleeve, and both the first sealing plug and the second sealing plug are in a closed state; in the second insertion state, the end of the insertion pipe abuts the first sealing plug, the first sealing plug is in a closed state, and the second sealing plug is in an open state; in the third insertion state, the end of the insertion pipe abuts the first sealing plug, the first sealing plug is in an open state, and the second sealing plug is in an open state.

6. The negative pressure suction pump for a thrombus aspiration system according to claim 5, wherein, The first sealing plug has a first frustum-shaped abutting surface, and the first abutting ring has a second frustum-shaped abutting surface capable of abutting the first frustum-shaped abutting surface; the second sealing plug has a third frustum-shaped abutting surface, and the second abutting ring has a fourth frustum-shaped abutting surface capable of abutting the third frustum-shaped abutting surface.

7. The negative pressure suction pump for a thrombus aspiration system according to claim 5, characterized in that, The lifting frame includes a lifting plate and a plurality of lifting rings connected to the lifting plate. The plurality of lifting rings are evenly distributed at equal intervals in a ring shape. The lifting rings have internal threads, and the liquid receiving container has external threads that can cooperate with the internal threads. The liquid receiving container has an annular limiting plate that can abut against the lifting rings. Both the liquid receiving container and the collection container are made of transparent materials. The lifting rings have a first installation groove and a second installation groove. A light emitter is installed in the first installation groove, and a light receiver is installed in the second installation groove.

8. The negative pressure suction pump for a thrombus aspiration system according to claim 5, wherein, The turntable has a plurality of limiting cylinders evenly distributed at equal intervals in a ring shape. The number of limiting cylinders is equal to that of the liquid receiving containers and they correspond one by one. Each liquid receiving container is inserted into one limiting cylinder. A support spring whose top can abut against the liquid receiving container is installed on the turntable.

9. The negative pressure suction pump for a thrombus aspiration system according to claim 5, wherein It further includes a shielding part. The shielding part includes a plurality of surrounding rings evenly distributed at equal intervals in a ring shape and a plurality of connecting seats evenly distributed at equal intervals in a ring shape. The surrounding rings and the connecting seats are alternately distributed. One connecting seat is connected between two adjacent surrounding rings. The connecting seat has a connecting groove. The surrounding rings have two notch parts communicating with the connecting groove. The surrounding rings have a sealing ring that can abut against the liquid receiving container.

10. The negative pressure suction pump for a thrombus aspiration system according to claim 5, characterized in that, The upper container includes a circular top plate and an annular cylindrical upper surrounding plate fixedly connected to the circular top plate. Both the feed pipe and the air outlet pipe are installed at the circular top plate. The collection container is installed at the base through a lifting mechanism. The lifting mechanism includes a lifting seat connected to the collection container, an L-shaped frame fixed to the base, a lead screw bearing installed at the base, a lead screw motor installed at the L-shaped frame, a lead screw connecting the lead screw motor and the lead screw bearing, and a vertical guide rail fixed to the L-shaped frame. The lifting seat has a threaded hole cooperating with the lead screw and a vertical sliding groove cooperating with the vertical guide rail.

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