Double-needle-cylinder separating device

Abstract

The utility model relates to a double-needle-cylinder separating device which comprises a liquid extracting needle cylinder assembly, the liquid extracting needle cylinder assembly comprises a needle-cylinder-shaped large needle cylinder and a large piston core rod inserted into the large needle cylinder in a sliding mode, the large piston core rod is provided with an assembling channel and a connecting hole communicated with the assembling channel, and the large needle cylinder is provided with a liquid extracting hole. The separating needle cylinder assembly comprises a needle-cylinder-shaped small needle cylinder and a small piston core rod which is inserted into the small needle cylinder in a sliding mode, the small needle cylinder is inserted along the assembling channel and is detachably connected with the large piston core rod, and the connecting hole is communicated with the small needle cylinder. The plugging piece is detachably connected to the large needle cylinder, and the plugging piece movably opens and closes the liquid extraction hole. According to the double-needle-cylinder separation device, by arranging a combined structure of the large needle cylinder and the small needle cylinder, high efficiency of separation steps is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a double syringe separation device. Background Art

[0002] In the existing medical equipment technology, the syringe is one of the commonly used tools in the medical process. Especially in the processes of transfusion, injecting drugs, etc., the double syringe is often used in the situation where multiple drugs or liquids need to be transported simultaneously. However, in the actual use process, there are some problems and limitations in the existing double syringe.

[0003] For example, the Chinese published document CN118490932 A discloses a syringe, which has a simple structure and cannot transport two liquids simultaneously, and there are problems such as difficult syringe separation. This may lead to inaccurate drug dosage and affect the treatment effect. In addition, during the operation process, due to the non-separation of the syringes, multiple liquids cannot be separated.

[0004] However, when using blood tests, the blood needs to be centrifuged and separated. The existing centrifugation separation is to put it into a centrifuge through an independent container for separation, and then the stratified liquid is extracted through a syringe for detection or sampling. This not only has low sampling efficiency, but also requires a large amount of samples, and it is easy to cause contamination during the transfer between containers. Summary of the Utility Model

[0005] To overcome the problems existing in the related art, an embodiment of the utility model provides a double syringe separation device to solve the technical problems of low sampling efficiency and easy contamination.

[0006] According to the first aspect of the embodiment of the utility model, a double syringe separation device includes:

[0007] A liquid extraction syringe assembly, including a large syringe in the shape of a syringe barrel and a large piston core rod slidably inserted into the large syringe barrel. The large piston core rod is provided with an assembly channel and a connection hole communicating with the assembly channel, and the large syringe barrel is provided with a liquid extraction hole;

[0008] A separation syringe assembly, including a small syringe in the shape of a syringe barrel and a small piston core rod slidably inserted into the small syringe barrel. The small syringe is inserted along the assembly channel and is detachably connected to the large piston core rod, and the connection hole communicates with the small syringe;

[0009] A plugging member detachably connected to the large syringe barrel, and the plugging member movably opens and closes the liquid extraction hole.

[0010] Optionally, the plugging member is screwed to the large syringe barrel.

[0011] Optionally, the large syringe includes a large cylindrical barrel in the shape of a syringe barrel, a first liquid suction tube protruding from the large barrel, and a connecting tube. The connecting tube surrounds the first liquid suction tube. The plugging member is detachably connected to the connecting tube, and the plugging member plugs the opening of the first liquid suction tube.

[0012] Optionally, the first liquid suction tube and the connecting tube are coaxially arranged. The end of the first liquid suction tube extends beyond the end of the connecting tube. The plugging member is screwed to the connecting tube.

[0013] Optionally, the plugging member includes a rotating part, a plugging tube protruding from the rotating part, and a rotating tube. The plugging tube is sleeved to plug the first liquid suction tube. The rotating tube is screwed to the connecting tube.

[0014] Optionally, the large piston core rod includes a piston part and a sealing member sleeved on the piston part. The assembly channel is arranged along the axis of the piston part. The connecting hole penetrates through the end of the piston part. The sealing member is slidably and sealingly connected to the large syringe.

[0015] Optionally, the tube wall of the piston part is provided with clearance holes distributed at intervals. The outer peripheral wall of the piston part is provided with a plurality of guiding ribs distributed at intervals. The guiding ribs slidably define the inner wall of the large syringe.

[0016] Optionally, the large piston core rod includes a connecting pipe protruding from the piston part. The small syringe is detachably connected to the connecting pipe. The second liquid suction tube of the small syringe is inserted into the connecting hole.

[0017] Optionally, the small syringe is screwed to the large piston core rod.

[0018] Optionally, the surface of the large syringe and / or the surface of the small syringe is provided with scales.

[0019] The technical solution provided by the embodiment of the present utility model may include the following beneficial effects: The double syringe separation device realizes the high efficiency of the separation step by setting the combined structure of a large syringe and a small syringe. The designed double syringe separation device of the present utility model is integrally placed in a centrifuge for centrifugation operation. The sample extracted in the large syringe is layered, and the small syringe can extract the upper liquid of the large syringe. Since the small syringe is operated under negative pressure during extraction, the small syringe can slide to an appropriate position inside the large syringe as the liquid is extracted until all the upper liquid is extracted. Medical staff do not need to manually adjust the position of the large syringe, which simplifies the operation process and reduces the operation difficulty. By utilizing the sliding function of the small syringe, the problem of uneven liquid delivery existing in the prior art is solved. The small syringe can accurately control the liquid extraction process to ensure the uniform separation of the upper liquid. The connection structure between the large syringe and the small syringe is reasonably designed. Through the cooperation of the seal and the guiding rib, the stability and reliability of the whole device during operation are ensured. This device can adapt to the separation requirements of liquids with different volumes and types, has strong versatility, and is applicable to a variety of medical application scenarios.

[0020] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present utility model, and are used together with the specification to explain the principles of the present utility model.

[0022] Figure 1 is a schematic structural diagram of a double syringe separation device shown according to an exemplary embodiment.

[0023] Figure 2 is a schematic cross-sectional structural diagram of a double syringe separation device shown according to an exemplary embodiment.

[0024] Figure 3 is a schematic structural diagram of a plugging member shown according to an exemplary embodiment.

[0025] Figure 4 is a schematic structural diagram of a large syringe shown according to an exemplary embodiment.

[0026] Figure 5 is a schematic structural diagram of a large piston core rod shown according to an exemplary embodiment.

[0027] Figure 6 is a schematic structural diagram of a small syringe shown according to an exemplary embodiment.

[0028] Figure 7 is a schematic structural diagram of a small piston core rod shown according to an exemplary embodiment.

[0029] In the figure, 1 is a liquid extraction syringe assembly; 10 is a large syringe; 100 is a large cylinder body; 101 is a first liquid extraction tube; 102 is a connecting tube; 103 is a liquid extraction hole; 11 is a large piston core rod; 110 is an assembly channel; 111 is a connecting hole; 112 is a piston part; 1120 is a seal; 114 is a clearance hole; 115 is a guiding rib; 116 is a rotary adapter tube; 2 is a separating syringe assembly; 20 is a small syringe; 200 is a second liquid extraction tube; 21 is a small piston core rod; 3 is a plugging member; 30 is a rotating part; 31 is a plug tube; 32 is a rotating tube. Detailed implementation manners

[0030] Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams rather than physical diagrams, and should not be construed as a limitation to this patent; for better illustrating the embodiments of the present utility model, some components in the attached drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0031] In the attached drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only for illustrative purposes and should not be construed as a limitation to this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] In the description of the present utility model, unless otherwise clearly specified and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Such as Figure 1 And Figure 2As shown in the figure, the present utility model provides a double syringe separation device, which is composed of a liquid extraction syringe assembly 1, a separation syringe assembly 2 and a sealing member 3. Specifically, the liquid extraction syringe assembly 1 includes a syringe-shaped large syringe 10 and a large piston core rod 11 slidably inserted into the large syringe 10, which is used to realize the extraction and transportation of liquid. The separation syringe assembly 2 is composed of a small syringe 20 and a small piston core rod 21 slidably fitted in the small syringe 20, and is mainly used for accurately separating and extracting the upper liquid.

[0034] The sealing member 3 is sequentially connected to the liquid extraction syringe assembly 1 and the separation syringe assembly 2 by means of screw or other detachable means to form a closed and operable system, ensuring the precise control and effective separation of liquid during operation. The sealing member 3 plays a role of connection and sealing, and can also keep the small syringe 20 in a negative pressure environment when sliding in the large syringe 10.

[0035] As Figure 3 shown, the sealing member 3 is connected to the top of the large syringe 10 in a detachable manner, and is used to open and close the liquid extraction hole 103 on the large syringe 10. The sealing member 3 is connected to the large syringe 10 by means of screw to ensure tight sealing.

[0036] Specifically, the structure of the sealing member 3 includes a rotating part 30, a plug tube 31 protruding from the rotating part 30 and a rotating tube 32 connected thereto. The rotating part 30 is located at the bottom of the sealing member 3, and its appearance is in the shape of a cuboid, and the side length is greater than the outer diameter of the rotating tube 32, making it convenient to grasp and rotate during operation. At the same time, one side of the rotating part 30 is hermetically connected to the bottom of the plug tube 31 and the rotating tube 32. The rotating tube 32 has an appearance of a tube shape and is provided with internal threads and / or external threads.

[0037] Specifically, the plug tube 31 is sleeved outside the first liquid extraction tube 101, and its inner diameter matches the outer diameter of the first liquid extraction tube 101, and the outer diameter is consistent with the inner diameter of the connecting tube 102 to ensure its tight fit. The inner diameter of the rotating tube 32 matches the outer diameter of the connecting tube 102, and is fixedly connected to the connecting tube 102 by means of screw. In addition, the lengths of the plug tube 31 and the rotating tube 32 are designed to be consistent with the lengths of the first liquid extraction tube 101 and the connecting tube 102.

[0038] As Figure 4 shown, the liquid extraction syringe assembly 1 includes a syringe-shaped large syringe 10 and a large piston core rod 11 slidably inserted into the large syringe 10. The large syringe 10 serves as the main container and has an inner cavity.

[0039] In this embodiment, the large syringe 10 includes a large cylindrical body 100 in the shape of a syringe barrel. The large cylindrical body 100 is in the shape of a circular tube, and a curved boss larger than the outer diameter of the large cylindrical body 100 is provided at its tail end. A first liquid suction tube 101 and a connecting tube 102 protruding from the large cylindrical body 100, the connecting tube 102 surrounds the first liquid suction tube 101, and tools such as needles can be loaded and unloaded in the area surrounded by the two tubes. The plugging member 3 is detachably connected to the connecting tube 102, and the plugging member 3 plugs the opening of the first liquid suction tube 101.

[0040] Specifically, during operation, liquid flows into or out of the large cylindrical body 100 through the liquid suction hole 103. The first liquid suction tube 101 and the connecting tube 102 are coaxially arranged, and the end of the first liquid suction tube 101 extends beyond the end of the connecting tube 102. The plugging member 3 is screwed to the connecting tube 102 and plugs the opening of the first liquid suction tube 101.

[0041] As Figure 5 shown, the design of the large piston core rod 11 includes an assembly channel 110 and a connecting hole 111 communicating with the assembly channel 110. The design of the connecting hole 111 is arranged coaxially with the liquid suction hole 103 provided on the large syringe 10, and the two are in communication with each other.

[0042] In this embodiment, the design of the large piston core rod 11 includes a piston portion 112 and a sealing member 1120 sleeved on the outer periphery of the piston portion 112. The sealing member 1120 is usually made of high-performance rubber material, and its outer diameter is slightly larger than the inner diameter of the large cylindrical body 100, so as to form a proper extrusion during the assembly process to achieve an effective sealing function. Two raised rings are designed on the outside of the sealing member 1120, and these raised structures will be in close contact with the inner wall of the large cylindrical body 100 after assembly, thus forming a hollow pressure chamber. This structural design can enhance the sealing effect and prevent liquid from leaking along the gap when the large piston core rod 11 moves.

[0043] Specifically, the assembly channel 110 is arranged along the axis of the piston portion 112 of the large piston core rod 11 and runs through the center line of the entire piston portion 112. The connecting hole 111 extends from the end of the piston portion 112 and runs through the entire end to be connected to the assembly channel 110. In addition, a sealing member 1120 is provided on the outer surface of the piston portion 112, and the sealing member 1120 is in close sliding fit connection with the inner wall of the large syringe 10.

[0044] In this embodiment, clearance holes 114 are provided at intervals on the tube wall of the piston portion 112. The clearance holes 114 are arranged axially along the tube wall, and the clearance holes 114 and the guiding ribs 115 are axially distributed at equal intervals. A plurality of guiding ribs 115 are provided at intervals on the outer peripheral wall of the piston portion 112. The ends of the guiding ribs 115 have arc transitions. These guiding ribs 115 are arranged axially along the piston portion 112 and are in sliding fit with the inner wall of the large syringe 10. The guiding ribs 115 slide to define the inner wall of the large syringe.

[0045] like Figure 6 As shown, the separation syringe assembly 2 includes a syringe-shaped small syringe 20 and a small piston core rod 21 slidably plugged into the small syringe 20. The small syringe is inserted along the assembly channel 110 and is detachably connected to the large piston core rod 11. The connecting hole 111 is connected to the small syringe 20. During operation, liquid can be delivered or sucked by pulling or pressing the small piston core rod 21. The tail end of the small syringe 20 is provided with a curved boss larger than the outer diameter of the small syringe 20.

[0046] Specifically, the large piston core rod 11 includes a transfer tube 116 protruding from the piston portion 112, the small syringe 20 is detachably connected to the transfer tube 116, and the second liquid extraction tube 200 of the small syringe 20 is inserted into the connecting hole 111. The small syringe is spirally connected to the large piston core rod 11.

[0047] like Figure 7 As shown, the outer diameter of the small piston core rod 21 is the same as the inner diameter of the small syringe 20, and the head of the small piston core rod 21 is provided with a sealing rubber material, which is the same as the material of the sealing member 1120. A small cylindrical boss is provided at the tail of the small piston core rod 21. When working, the user pulls the boss to work. There are multiple rectangular blocks axially distributed between the boss and the seal to play a connecting and supporting role.

[0048] Specifically, the surface of the large syringe and / or the surface of the small syringe is provided with a scale. The first step during operation is to first remove the blocking piece 3 of the large syringe 10 and extract the liquid through the large syringe 10. After the liquid extraction is completed, the blocking piece 3 is re-sealed at the mouth of the large syringe 10, and the large syringe 10 is inserted into a centrifuge for a rotary centrifugal operation to achieve liquid stratification. After the stratification process is completed, the upper layer of liquid is extracted using the small syringe 20. Since a negative pressure is formed inside the large syringe 10 during the operation, the small syringe 20 can slide along the inner wall of the large syringe 10 when extracting liquid until the upper layer of liquid is completely extracted. After the small syringe 20 is rotated and removed from the large piston core rod 11, the liquid extracted by the small syringe 20 is output.

[0049] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0050] It should be understood that the present utility model is not limited to the exact structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present utility model is only limited by the appended claims.

Claims

1. A double-cylinder separation device, characterized in that, The double syringe separation device includes: A liquid extraction syringe assembly, including a large syringe in the shape of a syringe barrel and a large piston core rod slidably inserted into the large syringe barrel. The large piston core rod is provided with an assembly channel and a connection hole communicating with the assembly channel, and the large syringe barrel is provided with a liquid extraction hole. A separation syringe assembly, including a small syringe in the shape of a syringe barrel and a small piston core rod slidably inserted into the small syringe barrel. The small syringe is inserted along the assembly channel and detachably connected to the large piston core rod, and the connection hole communicates with the small syringe. A plugging member detachably connected to the large syringe barrel, and the plugging member movably opens and closes the liquid extraction hole.

2. The double-cylinder separation device according to claim 1, wherein The plugging member is screwed to the large syringe barrel.

3. The double-cylinder separation device according to claim 1 or 2, characterized in that, The large syringe barrel includes a large barrel body in the shape of a syringe barrel, a first liquid extraction pipe protruding from the large barrel body, and a connecting pipe. The connecting pipe surrounds the first liquid extraction pipe. The plugging member is detachably connected to the connecting pipe, and the plugging member plugs the opening of the first liquid extraction pipe.

4. The double-cylinder separation device according to claim 3, characterized in that, The first liquid extraction pipe and the connecting pipe are coaxially arranged, and the end of the first liquid extraction pipe extends beyond the end of the connecting pipe. The plugging member is screwed to the connecting pipe.

5. The double-cylinder separation device according to claim 4, characterized in that, The plugging member includes a rotating part, a plugging pipe protruding from the rotating part, and a rotating pipe. The plugging pipe is sleeved to plug the first liquid extraction pipe, and the rotating pipe is screwed to the connecting pipe.

6. The double-cylinder separation device according to claim 1, characterized in that, The large piston core rod includes a piston part and a sealing member sleeved on the piston part. The assembly channel is arranged along the axis of the piston part. The connection hole penetrates through the end of the piston part, and the sealing member is slidably and sealingly connected to the large syringe barrel.

7. The double-cylinder separating device according to claim 6, wherein, The tube wall of the piston part is provided with clearance holes distributed at intervals, and the outer peripheral wall of the piston part is provided with a plurality of guiding convex ribs distributed at intervals. The guiding convex ribs slidably limit the inner wall of the large syringe barrel.

8. The double-cylinder separation device according to claim 6, wherein, The large piston core rod includes a connecting pipe protruding from the piston part. The small syringe is detachably connected to the connecting pipe, and the second liquid extraction pipe of the small syringe is inserted into the connection hole.

9. The double-cylinder separation device according to claim 1, wherein The small syringe is screwed to the large piston core rod.

10. The double-cylinder separation device according to claim 1, characterized in that The surface of the large syringe barrel and / or the surface of the small syringe barrel is provided with scales.

Images