Magnetic seal type preservation tube

Abstract

The utility model relates to medical instrument technical field discloses a kind of magnetic sealing type preservation tubes, including plastic handle rod, the plastic handle rod inside slidingly connected has push rod, the plastic handle rod bottom is provided with metal card holder, the metal card holder top and the plastic handle rod bottom are engaged, the metal card holder bottom is provided with upper cover, the upper cover top is fixedly connected with clamping block, the clamping block outer wall and the metal card holder inner wall are engaged, the upper cover outer wall is connected with pipe body with screw thread, the upper cover inside is provided with magnetic attraction subassembly;The magnetic attraction subassembly includes upper magnet.In the utility model, upper magnet and steel ball are attached in the upper cover, when thawing at room temperature, the pressure in the tube is increased by gaseous liquid nitrogen, while the magnetic force of magnet is weakened with the temperature rising, high-pressure gas can smoothly break open steel ball, and the pressure relief is realized by discharging through air vent, effectively prevent the damage of pipe body due to high pressure, so as to achieve the effect of controlling pressure relief and protecting the safety of sample.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a magnetically sealed storage tube. Background Technology

[0002] In the field of medical device technology, the long-term stable preservation of biological tissue samples is crucial for key aspects such as medical research and clinical treatment planning. Cryogenic storage, with its advantage of effectively inhibiting the metabolic activity of biological tissues, has become the mainstream preservation method. Among them, liquid nitrogen cryogenic storage is widely used due to its strong temperature maintenance capability. A magnetically sealed preservation tube is a specialized device developed to meet the needs of tissue sample preservation in liquid nitrogen cryogenic storage scenarios. This preservation tube must simultaneously meet the requirements of strict sealing in the low-temperature environment to prevent liquid nitrogen leakage from damaging the sample preservation environment, and the requirements of safe pressure relief during thawing at room temperature to avoid sudden pressure rises that could damage the tube body. Its core design revolves around adaptability to sealing and pressure relief during the transition between low-temperature and room-temperature environments to ensure the quality of tissue sample preservation and operational safety.

[0003] Existing tissue cryopreservation tubes mostly use glass or ordinary plastic tubes, sealed with rubber stoppers or simple screw caps. Some products are equipped with auxiliary operating components that are integrally molded plastic protrusions. The sealing principle mainly relies on the compression force generated by the interference fit between the rubber stopper and the tube opening, or the mechanical pressure when the screw cap is tightened. For pressure relief, pressure is released through a vent at the top of the open cryopreservation tube, which also prevents liquid nitrogen from seeping in. Tubes with vents are not truly sealed.

[0004] Existing cryopreservation tubes suffer from the problem of failing to simultaneously achieve cryogenic sealing and room temperature pressure relief, leading to potential safety hazards in sample preservation. During liquid nitrogen cryogenic storage, the tube must be tightly sealed to prevent liquid nitrogen leakage. However, during the thawing process at room temperature, the vaporization of residual liquid nitrogen inside the tube rapidly increases the internal pressure. Traditional cryopreservation tubes lack an adaptive pressure relief structure, and the tight seal prevents the timely release of high-pressure gas. As pressure accumulates, the tube is prone to rupture, which not only directly damages the tissue sample inside but also poses operational safety risks due to fragments generated from the rupture. This seriously affects the preservation safety and subsequent usability of the tissue sample. To address these issues, a magnetically sealed cryopreservation tube is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a magnetically sealed preservation tube, which aims to improve the problem that existing cryopreservation tubes cannot simultaneously achieve low-temperature sealing and room-temperature pressure relief, leading to potential safety hazards in sample preservation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A magnetically sealed storage tube includes a plastic handle rod with a push rod slidably connected inside. A metal bracket is provided at the bottom of the plastic handle rod, and the top of the metal bracket engages with the bottom of the plastic handle rod. A top cover is provided at the bottom of the metal bracket, and a locking block is fixedly connected to the top of the top cover. The outer wall of the locking block engages with the inner wall of the metal bracket. A tube body is threadedly connected to the outer wall of the top cover, and a magnetic suction assembly is provided inside the top cover. The magnetic attraction assembly includes an upper magnet, the outer wall of which is fixedly connected to the inner wall of the upper cover. A pressure relief assembly is provided at the top of the upper magnet, and a magnetic attraction carrier is provided at the bottom of the upper magnet.

[0007] As a further description of the above technical solution: The pressure relief assembly includes a steel ball, the outer wall of which is attached to the outer wall of the upper magnet, and a vent hole is provided inside the upper cover.

[0008] As a further description of the above technical solution: A lower magnet is provided at the bottom of the tube body, and the lower magnet is fixedly connected to the bottom of the tube body.

[0009] As a further description of the above technical solution: A pressure cap is fixedly connected inside the plastic handle rod, and the push rod is slidably connected inside the pressure cap.

[0010] As a further description of the above technical solution: A push rod is fixedly connected to the bottom of the push rod, and the push rod is slidably connected inside the plastic handle rod.

[0011] As a further description of the above technical solution: A compression spring is fitted on the outer wall of the push rod. One end of the compression spring is fixedly connected to the bottom of the push rod, and the other end of the compression spring is fixedly connected to the inner wall of the plastic handle rod.

[0012] This utility model has the following beneficial effects: 1. In this utility model, the magnet inside the upper cover is attached to the steel ball. During low-temperature storage, such as in a liquid nitrogen tank environment, the magnet's magnetic force is enhanced and it tightly attracts the steel ball, blocking the channel between the inside and outside of the tube and preventing liquid nitrogen leakage. When thawing at room temperature, the liquid nitrogen inside the tube vaporizes, causing the pressure to rise. At the same time, the magnet's magnetic force weakens as the temperature rises, and the high-pressure gas can smoothly break through the steel ball and be discharged through the vent hole to relieve pressure. This effectively prevents the tube from being damaged by high pressure, thereby achieving the effect of controlling pressure relief and ensuring sample safety.

[0013] 2. In this utility model, the inner push rod of the plastic handle is slidable, and the metal bracket engages with the upper cover block. The storage tube can be lifted and the upper cover can be installed or removed by means of the handle, without direct contact with the tube body and the upper cover, reducing the risk of sample contamination from hand contact. At the same time, the upper cover and the tube body are connected by threads, and the metal bracket engages with the plastic handle and the upper cover block respectively. All parts are firmly connected, avoiding loosening and leakage during storage or operation, and further improving the sealing performance and reliability of the tube body. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of a magnetically sealed storage tube proposed in this utility model; Figure 2 This is an exploded structural diagram of the top cover of a magnetically sealed storage tube proposed in this utility model. Figure 3 This is a schematic cross-sectional view of the tube body of a magnetically sealed storage tube proposed in this utility model. Figure 4 This is a cross-sectional structural diagram of the top cover of a magnetically sealed storage tube proposed in this utility model. Figure 5 This is a cross-sectional structural diagram of the plastic handle rod of a magnetically sealed storage tube proposed in this utility model.

[0015] Legend: 1. Plastic handle rod; 2. Button rod; 3. Metal card holder; 4. Top cover; 5. Tube body; 6. Lower magnet; 7. Locking block; 8. Vent hole; 9. Steel ball; 10. Upper magnet; 11. Magnetic carrier; 12. Pressure cap; 13. Push rod; 14. Compression spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figure 1 - Figure 5This utility model provides an embodiment of a magnetically sealed preservation tube, including a plastic handle 1. The plastic handle 1 is used by the operator to hold and lift the entire preservation tube, and also provides mounting and sliding support for the push rod 2, avoiding direct hand contact with the tube body 5 and reducing sample contamination. The push rod 2 is slidably connected inside the plastic handle 1. The push rod 2's function is to open and tighten the top cover 4 by axially sliding and engaging with the metal retainer 3, improving the ease of installing and removing the top cover 4. The bottom of the plastic handle 1 is provided with a metal retainer 3. The metal retainer 3's function is to achieve a stable connection between the two by engaging with the bottom of the plastic handle 1 at its top, and to transmit operating force by engaging with the retaining block 7 through its inner wall. The engagement between the top of the metal retainer 3 and the bottom of the plastic handle 1 ensures a firm connection between the plastic handle 1 and the metal retainer 3. To prevent it from falling off during operation, the bottom of the metal card holder 3 is provided with a top cover 4. The function of the top cover 4 is to seal the tube body 5 and provide installation space for the magnetic suction component. The top of the top cover 4 is fixedly connected with a locking block 7. The function of the locking block 7 is to engage with the inner wall of the metal card holder 3 so that the top cover 4 moves synchronously with the metal card holder 3. The outer wall of the locking block 7 engages with the inner wall of the metal card holder 3. The effect of this engagement structure is to ensure that the top cover 4 can accurately respond to the operation of the plastic handle rod 1 to achieve connection or separation with the tube body 5. The tube body 5 is threadedly connected to the outer wall of the top cover 4. The function of the tube body 5 is to hold the tissue sample to be preserved. The effect of the threaded connection is to ensure the airtightness of the tube body 5 and the top cover 4 to prevent liquid nitrogen leakage or sample contamination. The top cover 4 is provided with a magnetic suction component. The function of the magnetic suction component is to adapt to low temperature storage and room temperature thawing scenarios and achieve adaptive switching between sealing and depressurization. The magnetic attraction assembly includes an upper magnet 10. The function of the upper magnet 10 is to enhance the magnetic force to attract the pressure relief assembly and achieve sealing at low temperatures, and to weaken the magnetic force to facilitate pressure relief at room temperature. The outer wall of the upper magnet 10 is fixedly connected to the inner wall of the upper cover 4. This fixed connection ensures the stability of the upper magnet 10 and the reliability of the magnetic effect. A pressure relief assembly is provided on the top of the upper magnet 10. The function of the pressure relief assembly is to close and block the internal and external channels of the tube to prevent liquid nitrogen leakage at low temperatures, and to open and release high-pressure gas to prevent damage to the tube body 5 when the pressure inside the tube rises at room temperature. A magnetic carrier 11 is provided at the bottom of the upper magnet 10. The magnetic carrier 11 is removable and replaceable, and different types of carrier structures can be replaced. The function of the magnetic carrier 11 is to provide installation support for the upper magnet 10 and to help enhance the magnetic effect of the upper magnet 10, ensuring its stable attraction force to the pressure relief assembly.

[0018] Reference Figure 1 - Figure 5The pressure relief assembly includes steel balls 9. Its function is to adapt to both cryogenic storage and room temperature thawing scenarios, enabling adaptive switching between sealing and pressure relief in the tube body 5. This prevents liquid nitrogen leakage at low temperatures and damage to the tube body 5 due to high pressure at room temperature. The outer wall of the steel balls 9 adheres to the outer wall of the upper magnet 10. The steel balls 9, in conjunction with the upper magnet 10, block or open the channels between the inside and outside of the tube. When adhered, they form a seal; when separated, they allow gas to escape. This ensures precise and controllable sealing and pressure relief actions. The upper cover 4 has a vent hole 8 inside. The vent hole 8 allows high-pressure gas inside the tube body 5 to escape at room temperature, providing rapid... To reduce internal pressure and prevent tube 5 from rupturing due to excessive pressure, a lower magnet 6 is installed at the bottom of tube 5. The lower magnet 6 assists in enhancing the magnetic stability of the upper magnet 10, ensuring that the upper magnet 10 has a more reliable attraction force on the steel ball 9 at low temperatures. The lower magnet 6 is fixedly connected to the bottom of tube 5 to ensure its position is fixed, preventing it from shifting and affecting the overall function of the magnetic attraction assembly. A pressure cap 12 is fixedly connected inside the plastic handle rod 1. The pressure cap 12 provides sliding guidance for the push rod 2 and restricts its sliding trajectory, preventing the push rod 2 from sliding. The offset ensures smooth operation. The push rod 2 is slidably connected inside the pressure cap 12. The push rod 2's function is to drive the push rod 13 to move via axial sliding, cooperating with the pressure spring 14 to achieve reset. This facilitates the operator's control over the installation and removal of the top cover 4. The push rod 13 is fixedly connected to the bottom of the push rod 2. The push rod 13's function is to transmit the force of the push rod 2, assisting in the connection or separation of the top cover 4 and the tube body 5. This ensures effective transmission of operating force and improves the ease of installation and removal of the top cover 4. The push rod 13 is slidably connected inside the plastic handle rod 1. This sliding connection provides axial movement space for the push rod 13. The effect is to ensure that the push rod 13 can move smoothly. The outer wall of the push rod 13 is fitted with a compression spring 14. The function of the compression spring 14 is to provide a restoring force after the push rod 2 is pressed, so that the push rod 2 automatically returns to the initial position for easy operation next time. One end of the compression spring 14 is fixedly connected to the bottom of the push rod 2. The function of this fixed connection is to ensure that the compression spring 14 and the push rod 2 are subjected to force synchronously, so that the restoring force can be effectively transmitted to the push rod 2. The other end of the compression spring 14 is fixedly connected to the inner wall of the plastic handle rod 1. The function of this fixed connection is to provide force support for the compression spring 14, so that the position of the compression spring 14 is stable when it is compressed and reset.

[0019] Working principle: Pressing the push rod 2 inside the plastic handle rod 1 causes the push rod 13, which is fixedly connected to the bottom of the push rod 2, to slide inside the plastic handle rod 1. At the same time, the push rod 2 slides along the inner wall of the pressure cap 12, which is fixedly connected inside the plastic handle rod 1. During the sliding process, the push rod 13 will compress the compression spring 14 sleeved on its outer wall. One end of the compression spring 14 is fixed to the bottom of the push rod 2 and the other end is fixed to the inner wall of the plastic handle rod 1. After releasing the push rod 2, the compression spring 14 resets and causes the push rod 13 to move back to the initial position. The push rod 13 then causes the push rod 2 to return to the initial position. By moving the plastic handle rod 1, the metal card seat 3 that is engaged with its bottom moves. The metal card seat 3 causes the card block 7 on the top of the upper cover 4, which is engaged with its inner wall, to move. The card block 7 causes the upper cover 4, which is fixedly connected, to move. The upper cover 4 causes the tube body 5, which is threadedly connected to its outer wall, to move, thereby lifting the storage tube. Rotating the plastic handle rod 1 causes the metal card holder 3 to rotate, which in turn causes the card block 7 to rotate, which in turn causes the upper cover 4 to rotate. The upper cover 4 is tightened or loosened by the threaded connection with the tube body 5. The upper magnet 10 in the magnetic suction assembly fixedly connected inside the upper cover 4 attracts the steel ball 9 on its top during low-temperature storage, blocking the vent hole 8 inside the upper cover 4. When thawing at room temperature, the liquid nitrogen vaporization pressure inside the tube body 5 increases, pushing the steel ball 9. The steel ball 9 detaches from the attraction of the upper magnet 10 inside the upper cover 4 and moves upward. The high-pressure gas is discharged through the vent hole 8. After depressurization, the steel ball 9 falls back and reattaches to the upper magnet 10. The lower magnet 6 fixedly connected to the bottom of the tube body 5 moves synchronously with the movement or rotation of the tube body 5.

Claims

1. A magnetically sealed storage tube, comprising a plastic handle (1), characterized in that: The plastic handle (1) has a push rod (2) slidably connected inside. The bottom of the plastic handle (1) is provided with a metal bracket (3). The top of the metal bracket (3) is engaged with the bottom of the plastic handle (1). The bottom of the metal bracket (3) is provided with a top cover (4). The top of the top cover (4) is fixedly connected with a block (7). The outer wall of the block (7) is engaged with the inner wall of the metal bracket (3). The outer wall of the top cover (4) is threaded with a tube (5). The top cover (4) is provided with a magnetic suction assembly inside. The magnetic attraction assembly includes an upper magnet (10), the outer wall of which is fixedly connected to the inner wall of the upper cover (4), a pressure relief assembly is provided on the top of the upper magnet (10), and a magnetic carrier (11) is provided on the bottom of the upper magnet (10).

2. The magnetically sealed storage tube according to claim 1, characterized in that: The pressure relief assembly includes a steel ball (9), the outer wall of the steel ball (9) is attached to the outer wall of the upper magnet (10), and the upper cover (4) has a vent hole (8) inside.

3. The magnetically sealed storage tube according to claim 2, characterized in that: The bottom of the tube (5) is provided with a lower magnet (6), which is fixedly connected to the bottom of the tube (5).

4. The magnetically sealed storage tube according to claim 1, characterized in that: The plastic handle rod (1) is fixedly connected to a pressure cap (12), and the push rod (2) is slidably connected inside the pressure cap (12).

5. A magnetically sealed storage tube according to claim 4, characterized in that: The bottom of the push rod (2) is fixedly connected to a push rod (13), which is slidably connected inside the plastic handle rod (1).

6. A magnetically sealed storage tube according to claim 5, characterized in that: The outer wall of the push rod (13) is fitted with a compression spring (14), one end of the compression spring (14) is fixedly connected to the bottom of the push rod (2), and the other end of the compression spring (14) is fixedly connected to the inner wall of the plastic handle rod (1).

Images