Medical experiment centrifugal tube with leakage-proof sealing plug and erasable marking area

Abstract

The utility model discloses a medical experiment centrifugal tube with leakproof sealing plug and erasable mark area relates to medical examination technical field, including sealing plug and centrifugal tube main part, the inner wall of centrifugal tube main part one end interference fit and sealing plug clasp, the inside of sealing plug is passed through and is equipped with the round cavity, the inner wall center point of round cavity is rotated and is connected with the round block through the pivot, the inside of round block is passed through and is equipped with eccentric chamber, the inner wall of eccentric chamber has extrusion block and slides perpendicularly, the inner wall of eccentric chamber is located above extrusion block and has taper block and slides horizontally, the inner wall fixed connection of sealing plug has annular silica gel membrane, the centrifugal tube main part is located below sealing plug and is fixedly connected with PP coating, the outer wall fixed connection of PP coating has the protective layer, and eccentric round block, taper block and other components in sealing plug interior are automatically triggered sealing enhancement through centrifugal force, and manual adjustment is not needed for experimental staff, and the sealing failure caused by the operation carelessness is avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical testing technology, specifically a medical experimental centrifuge tube with a leak-proof sealing plug and an erasable marking area. Background Technology

[0002] Patent 202222106529.4 discloses "a centrifuge tube for medical testing", which includes a centrifuge tube body, a fixing ring fixedly connected to the outside of the centrifuge tube body, a connecting rope fixedly connected to the outside of the fixing ring, a cover plate provided on the top of the centrifuge tube body, a sealing plug fixedly connected to the bottom of the cover plate, the sealing plug engaging with the top of the centrifuge tube body, the cover plate being fixedly connected to the connecting rope, and a limit ring fixedly connected to the outside of the centrifuge tube body.

[0003] The aforementioned centrifuge tubes can be sealed at the inlet using a sealing plug. However, the patent does not mention the material of the sealing plug or the engagement depth. If the sealing plug is made of ordinary hard plastic, or the engagement depth only covers the top opening of the centrifuge tube, the sample inside the tube will easily leak from the gap between the sealing plug and the tube wall due to the outward pressure generated by centrifugal force during high-speed centrifugation. When the sample is liquid, leakage will not only lead to sample loss, but may also contaminate the centrifuge chamber and cause cross-infection risk. Therefore, it is necessary to propose a medical experimental centrifuge tube with a leak-proof sealing plug and an erasable marking area. Utility Model Content

[0004] The purpose of this invention is to provide a medical experimental centrifuge tube with a leak-proof sealing plug and an erasable marking area to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a medical experimental centrifuge tube with a leak-proof sealing plug and an erasable marking area, comprising a sealing plug and a centrifuge tube body, wherein the inner wall of one end of the centrifuge tube body is press-fitted with the sealing plug; The sealing plug has a through-hole circular cavity. A circular block is rotatably connected to the center point of the inner wall of the circular cavity via a rotating shaft. An eccentric cavity is through-hole inside the circular block. A squeezing block slides vertically on the inner wall of the eccentric cavity. A conical block slides horizontally on the inner wall of the eccentric cavity above the squeezing block. An annular silicone membrane is fixedly connected to the inner wall of the sealing plug. A PP coating is fixedly connected to the main body of the centrifuge tube below the sealing plug. A protective layer is fixedly connected to the outer wall of the PP coating.

[0006] Preferably, the inner bottom wall of the eccentric cavity has a through hole, and a spring is fixedly connected to the upper surface of the annular silicone membrane. One end of the spring extends through the hole into the eccentric cavity and is fixedly connected to the extrusion block.

[0007] Preferably, an annular sealing gasket is fixedly connected to the lower surface of the annular silicone membrane, and the annular sealing gasket abuts against the centrifuge tube body.

[0008] Preferably, a horizontal groove is formed through the inner top wall of the eccentric cavity, and one end of the conical block extends into the horizontal groove.

[0009] Preferably, the upper surface of the extrusion block is inclined, and the conical block abuts against the extrusion block.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In the non-centrifugal state, the spring pre-tightening force ensures that the annular sealing gasket fits tightly with the tube opening, preventing leakage during sample transfer and storage. During high-speed centrifugation, the eccentric structure drives the conical block to cooperate with the squeezing block, converting the centrifugal force into a vertical sealing force. The sealing pressure is automatically enhanced as the rotation speed increases. The eccentric circular block, conical block and other components inside the sealing plug are automatically triggered to enhance the seal through centrifugal force, eliminating the need for manual adjustment by the experimenter and avoiding seal failure due to operational negligence. Attached Figure Description

[0011] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a cross-sectional view of the sealing plug of this utility model; Figure 3 This is a schematic diagram of the installation position of the PP coating and protective layer of this utility model; Figure 4 This is a cross-sectional view of the circular block structure of this utility model.

[0012] In the diagram: 1. Sealing plug; 2. Centrifuge tube body; 3. Round block; 4. Extrusion block; 5. Conical block; 6. Annular silicone membrane; 7. PP coating; 8. Protective layer; 9. Spring; 10. Annular sealing gasket. Detailed Implementation

[0013] Please see Figure 1-4 This utility model provides a technical solution: Example 1: A medical experimental centrifuge tube with a leak-proof sealing plug and an erasable marking area, comprising a sealing plug 1 and a centrifuge tube body 2, wherein the inner wall of one end of the centrifuge tube body 2 is press-fitted with the sealing plug 1; The sealing plug 1 has a through-hole circular cavity. The center point of the inner wall of the circular cavity is rotatably connected to a circular block 3 via a rotating shaft. The circular block 3 has an eccentric cavity through-hole. The inner wall of the eccentric cavity has a vertically sliding extrusion block 4. The inner wall of the eccentric cavity is horizontally slidably connected to a conical block 5 above the extrusion block 4. The inner wall of the sealing plug 1 is fixedly connected to an annular silicone membrane 6. The centrifuge tube body 2 is located below the sealing plug 1 and is fixedly connected to a PP coating 7. The outer wall of the PP coating 7 is fixedly connected to a protective layer 8. The geometric center of the eccentric cavity is eccentrically set with the rotation center of the circular block 3. The offset is sufficient to drive the circular block 3 to rotate in an oriented manner under the action of centrifugal force. The sealing plug 1 is made of medical-grade polyethylene, the annular silicone membrane 6 is made of medical-grade silicone rubber, and the protective layer 8 is a transparent epoxy resin coating that covers the surface of the PP coating 7 and forms an alcohol-resistant thin film after curing.

[0014] When in use, the sealing plug 1 is inserted into the upper end of the centrifuge tube body 2, and the squeezing block 4 applies a pre-tightening force to the annular silicone membrane 6, so that the annular sealing gasket 10 fits tightly against the inner wall of the centrifuge tube body 2, achieving basic sealing in non-centrifugal state. The centrifuge tube body 2 rotates with the centrifuge. The eccentric side of the circular block 3 is facing outward, causing the center of gravity of the eccentric cavity to shift. Under the action of centrifugal force, it rotates around the central axis and drives the conical block 5 to rotate synchronously to the end of the horizontal slide near the centrifugal direction. The conical block 5 slides outward along the horizontal slide under the centrifugal force. Its wedge-shaped end presses the inclined surface of the extrusion block 4, converting the horizontal force into a vertical downward force, causing the extrusion block 4 to move down and compress the spring 9. The annular silicone membrane 6 is squeezed by the spring 9 and further adheres to the inner wall of the centrifuge tube body 2. The contact pressure increases with the rotation speed, achieving high-pressure sealing. As the rotation speed decreases, the centrifugal force of the conical block 5 decreases, the spring 9 resets and pushes the squeezing block 4 upward, and the conical block 5 slides down to reset. The annular sealing gasket 10 returns to its basic sealing state. Experimenters can use a medical marker to write sample information in the marking area. When modifications are needed, they can be removed by wiping with an alcohol swab. During routine disinfection, the protective layer 8 can resist alcohol corrosion and ensure that the coating does not peel off.

[0015] Example 2: The technical solutions in this example that differ from Example 1 include; The inner bottom wall of the eccentric cavity has a through hole. A spring 9 is fixedly connected to the upper surface of the annular silicone membrane 6. One end of the spring 9 extends into the eccentric cavity through the hole and is fixedly connected to the extrusion block 4, so that the spring 9 can push the annular sealing gasket 10 against the opening of the centrifuge tube body 2. The lower surface of the annular silicone membrane 6 is fixedly connected to the annular sealing gasket 10, which abuts against the centrifuge tube body 2, so that the annular sealing gasket 10 can increase the sealing performance of the sealing plug 1. A horizontal groove is opened through the inner top wall of the eccentric cavity. One end of the conical block 5 extends into the horizontal groove. The upper surface of the extrusion block 4 is inclined, and the conical block 5 abuts against the extrusion block 4.

Claims

1. A medical experimental centrifuge tube with a leak-proof sealing plug and an erasable marking area, comprising a sealing plug (1) and a centrifuge tube body (2), wherein the inner wall of one end of the centrifuge tube body (2) is press-fitted with the sealing plug (1); Its features are, The sealing plug (1) has a through-hole circular cavity. The center point of the inner wall of the circular cavity is connected to a circular block (3) via a rotating shaft. The circular block (3) has an eccentric cavity through-hole. The inner wall of the eccentric cavity has a vertically sliding extrusion block (4). The inner wall of the eccentric cavity is connected to a horizontally sliding conical block (5) above the extrusion block (4). The inner wall of the sealing plug (1) is fixedly connected to an annular silicone membrane (6). The centrifuge tube body (2) is fixedly connected to a PP coating (7) below the sealing plug (1). The outer wall of the PP coating (7) is fixedly connected to a protective layer (8).

2. A medical experimental centrifuge tube with a leak-proof sealing plug and an erasable marking area according to claim 1, characterized in that: The inner bottom wall of the eccentric cavity is provided with a hole, and a spring (9) is fixedly connected to the upper surface of the annular silicone film (6). One end of the spring (9) extends into the eccentric cavity through the hole and is fixedly connected to the extrusion block (4).

3. A medical experimental centrifuge tube with a leak-proof sealing plug and an erasable marking area according to claim 1, characterized in that: An annular sealing gasket (10) is fixedly connected to the lower surface of the annular silicone membrane (6), and the annular sealing gasket (10) abuts against the centrifuge tube body (2).

4. A medical experimental centrifuge tube with a leak-proof sealing plug and an erasable marking area according to claim 1, characterized in that: The inner top wall of the eccentric cavity is provided with a horizontal sliding groove, and one end of the conical block (5) extends into the horizontal sliding groove.

5. A medical experimental centrifuge tube with a leak-proof sealing plug and an erasable marking area according to claim 1, characterized in that: The upper surface of the extrusion block (4) is inclined, and the conical block (5) abuts against the extrusion block (4).

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