Double-channel rotary sealing device

Abstract

The embodiment of the utility model discloses a double-channel rotary sealing device which comprises an inlet connector, a first sealing ring, a second sealing ring, an outlet connector, a rotary head and a double-shaft rod. A center channel and a peripheral channel are arranged in the double-shaft rod, the inlet connector is communicated with the center channel, the inner diameter of the first sealing ring is in interference fit with the double-shaft rod, and the outer diameter of the first sealing ring is in interference fit with the rotating head; the outlet connector is communicated with the peripheral channel, and the inner diameter of the second sealing ring is in interference fit with the double-shaft rod; and the outer diameter of the second sealing ring is in interference fit with the rotating head. By implementing the device disclosed by the embodiment of the utility model, the volume of the device can be reduced as much as possible, so that the cell loss is reduced, the fluid smoothness is kept, and the friction heating condition is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing devices, in particular to a double-channel rotary sealing device. Background Art

[0002] In the biomedical field, common sealing devices are usually bulky, require the use of lubricants, and are designed with large compression to extend service life. However, this design increases friction and heat, and is prone to friction particles, which is not conducive to biomedical applications, especially when disposable consumables are required, because these consumables cannot use lubricants and need to minimize the generation of particles.

[0003] Therefore, it is necessary to design a new device to minimize the volume of the device to reduce cell loss and maintain fluid patency and reduce frictional heating. Utility Model Content

[0004] The utility model aims to overcome the defects of the prior art and provide a double-channel rotary sealing device.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions: providing a dual-channel rotary sealing device, including: an inlet joint, a first sealing ring, a second sealing ring, an outlet joint, a rotating head and a double-axis rod; the double-axis rod is provided with a central channel and a peripheral channel, the inlet joint is connected with the central channel, the inner diameter of the first sealing ring is interference fit with the double-axis rod, and the outer diameter of the first sealing ring is interference fit with the rotating head; the outlet joint is connected with the peripheral channel, the inner diameter of the second sealing ring is interference fit with the double-axis rod; the outer diameter of the second sealing ring is interference fit with the rotating head.

[0006] A further technical solution is as follows: a slot is provided in the rotating head, and the double-axis rod is inserted in the slot.

[0007] A further technical solution is as follows: the double-axis rod comprises an inner rod and an outer rod, the inner rod is inserted into the outer rod, and the inner wall of the outer rod and the outer wall of the inner rod are combined to form the peripheral channel; a central channel is arranged in the inner rod.

[0008] A further technical solution is as follows: both ends of the inner rod extend outwards to the outside of the outer rod respectively.

[0009] A further technical solution is that the second sealing ring is interference fit with the outer periphery of the outer rod.

[0010] A further technical solution is as follows: the first sealing ring is interference fit with the outer periphery of the inner rod.

[0011] A further technical solution is as follows: an upper bearing and a lower bearing are connected between the outer rod and the rotating head, and the upper bearing is located above the lower bearing.

[0012] A further technical solution is: the first sealing ring is located above the second sealing ring, and the second sealing ring is located above the upper bearing.

[0013] A further technical solution is as follows: an outer liner and an inner liner are installed between the upper bearing and the lower bearing.

[0014] A further technical solution is as follows: a cavity is connected below the double-axis rod.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model sets an inlet joint, a first sealing ring, a second sealing ring, an outlet joint, a rotating head and a double-axis rod, and uses the inlet joint, the rotating head, the first sealing ring and the double-axis rod to build a first sealing channel, and the outlet joint, the double-axis rod, the rotating head and the second sealing ring to build a second sealing channel. The sealing ring and the extruded double-axis rod and the rotating head have an interference fit, so as to minimize the volume of the device, reduce cell loss, maintain fluid patency, and reduce frictional heat generation.

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic cross-sectional view of a dual-channel rotary sealing device provided in an embodiment of the utility model;

[0019] Description of the symbols in the figure:

[0020] 10. Inlet joint; 20. First sealing ring; 30. Second sealing ring; 40. Outlet joint; 50. Rotating head; 60. Double-axis rod; 61. Inner rod; 62. Outer rod; 63. Center channel; 64. Peripheral channel; 70. Upper bearing; 71. Inner liner; 80. Lower bearing; 81. Outer liner. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0023] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0024] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0025] See also Figure 1 , Figure 1 A schematic diagram of the cross-sectional structure of a dual-channel rotary sealing device provided in an embodiment of the utility model can be used in scenarios such as cell culture to minimize dead volume to reduce cell loss and fluid patency. On the basis of sealing, the most suitable sealing compression rate for consumables is obtained through repeated tests, balancing service life and friction, manufacturing precision and cost, which can effectively reduce costs and improve yield rates.

[0026] See also Figure 1 A dual-channel rotary sealing device comprises: an inlet joint 10, a first sealing ring 20, a second sealing ring 30, an outlet joint 40, a rotary head 50 and a double-shaft rod 60; a central channel 63 and a peripheral channel 64 are arranged in the double-shaft rod 60, the inlet joint 10 is communicated with the central channel 63, the inner diameter of the first sealing ring 20 is interference fit with the double-shaft rod 60, and the outer diameter of the first sealing ring 20 is interference fit with the rotary head 50; the outlet joint 40 is communicated with the peripheral channel 64, the inner diameter of the second sealing ring 30 is interference fit with the double-shaft rod 60; the outer diameter of the second sealing ring 30 is interference fit with the rotary head 50.

[0027] The inlet connector 10 is connected to a hose, and the outlet connector 40 is also connected to a hose.

[0028] In this embodiment, the fluid A enters the space above the first sealing ring 20 from the inlet joint 10, and then enters the lower cavity through the central pipe. The inner diameter of the first sealing ring 20 and the double-shaft rod 60 are interference-fitted, which has the effect of extrusion sealing. The outer diameter of the first sealing ring 20 and the rotating head 50 are interference-fitted, which has the effect of extrusion sealing. Thus, the upper part of the first sealing ring 20 can be sealed and isolated from the lower part, forming a sealing channel 1.

[0029] Fluid B enters the space above the second sealing ring 30 from the peripheral channel 64, and then connects to the external pipeline through the outlet joint 40. The inner diameter of the second sealing ring 30 and the double-shaft rod 60 are interference-fitted to achieve the effect of extrusion sealing. The outer diameter of the second sealing ring 30 and the rotating head 50 are interference-fitted to achieve the effect of extrusion sealing, and the upper and lower parts of the second sealing ring 30 are sealed and isolated to form a sealing channel 2.

[0030] The two sealing channels formed can minimize the dead area in the cavity and reduce cell loss, and the interference fit can ensure sealing while reducing friction and heat.

[0031] When in use, the double-shaft rod 60 and the cavity connected below rotate continuously, while the upper part of the rotating head 50, the inlet joint 10, and the outlet joint 40 remain stationary, forming two continuous closed channels connecting the static and moving parts. It is used in the field of continuous centrifugation, so that it can rotate and centrifuge while taking in and out liquid.

[0032] In one embodiment, see Figure 1 The rotating head 50 is provided with a slot, and the double-axis rod 60 is inserted into the slot.

[0033] In one embodiment, see Figure 1 The above-mentioned double-axis rod 60 includes an inner rod 61 and an outer rod 62. The inner rod 61 is inserted into the outer rod 62, and the inner wall of the outer rod 62 and the outer wall of the inner rod 61 are combined to form an outer peripheral channel 64; a central channel 63 is provided in the inner rod 61.

[0034] In one embodiment, see Figure 1 The two ends of the inner rod 61 extend outward to the outside of the outer rod 62 respectively.

[0035] In one embodiment, see Figure 1 The second sealing ring 30 mentioned above is interference fit with the outer periphery of the outer rod 62.

[0036] In one embodiment, see Figure 1 The first sealing ring 20 mentioned above is interference fit with the outer periphery of the inner rod 61.

[0037] The design of the slot and the double-axis rod 60 makes the rotating head 50 have better stability and durability. The peripheral channel 64 of the outer rod 62 and the central channel 63 of the inner rod 61 can be used to transmit liquid or gas, which increases the functionality of the rotating head 50. The interference fit of the first sealing ring 20 and the second sealing ring 30 can effectively prevent liquid leakage, thereby improving the sealing performance of the rotating head 50.

[0038] When the rotating head 50 is working, the liquid in the double-shaft rod 60 can be transferred to the required position through the peripheral channel 64 of the outer rod 62 and the central channel 63 of the inner rod 61 to achieve the corresponding function. At the same time, the interference fit of the first sealing ring 20 and the second sealing ring 30 can ensure that the liquid will not leak and maintain a stable working state when the rotating head 50 is running. The design of the inner rod 61 extending outside the outer rod 62 can better support the structure of the rotating head 50 and increase the stability and durability of the rotating head 50.

[0039] In one embodiment, see Figure 1 An upper bearing 70 and a lower bearing 80 are connected between the outer rod 62 and the rotating head 50, and the upper bearing 70 is located above the lower bearing 80. The double bearings can ensure the concentricity of the rotation, avoid swing friction, and improve the stability of the product.

[0040] In one embodiment, see Figure 1 The first sealing ring 20 is located above the second sealing ring 30 , and the second sealing ring 30 is located above the upper bearing 70 .

[0041] In one embodiment, see Figure 1 An outer liner 81 and an inner liner 71 are installed between the upper bearing 70 and the lower bearing 80 .

[0042] In one embodiment, see Figure 1 A cavity is connected below the double-axis rod 60.

[0043] In this embodiment, by using the upper bearing 70 and the lower bearing 80 to connect the outer rod 62 and the rotating head 50, the concentricity of the rotation can be ensured, and the swing friction can be avoided, thereby improving the stability of the product. The design of the double bearings can increase the support and protection strength, and increase the service life and stability of the product. In addition, the setting of the first sealing ring 20 and the second sealing ring 30 can effectively prevent foreign substances such as dust and water vapor from invading the bearing, protect the bearing from external pollution, and extend the life of the bearing. The outer liner 81 supports the lower bearing 80, and the inner liner 71 supports the upper bearing 70. The installation of the outer liner 81 and the inner liner 71 can reduce friction, improve the overall rotation efficiency, and reduce energy loss. Through the above design, the stability and life of the product can be ensured, and the overall performance can be improved.

[0044] In summary, fluid A enters the space above the first sealing ring 20 through the inlet connector 10, and then enters the lower cavity through the central channel 63 to form a sealed channel 1. Fluid B enters the space above the second sealing ring 30 through the peripheral channel 64, and then connects to the external pipeline through the outlet connector 40 to form a sealed channel 2. Through interference fit, the first sealing ring 20 and the second sealing ring 30 achieve extrusion sealing to form a continuous closed channel. Minimize the dead area in the cavity and reduce cell loss; interference fit ensures sealing while reducing frictional heat; the double-axis rod 60 and the cavity connected below rotate continuously to maintain the continuity of the closed channel; the slot and double-axis rod 60 design improve the stability and durability of the rotating head 50; the peripheral channel 64 of the outer rod 62 and the central channel 63 of the inner rod 61 increase the functionality of the rotating head 50; the interference fit of the first sealing ring 20 and the second sealing ring 30 effectively prevents liquid leakage and improves the sealing performance. Moreover, the upper bearing 70 and the lower bearing 80 connect the outer rod 62 and the rotating head 50 to ensure the concentricity of the rotation and increase the stability of the product; the setting of the first sealing ring 20 and the second sealing ring 30 can protect the bearing from external pollution and extend the life of the bearing; the installation of the outer liner 81 and the inner liner 71 reduces friction, improves rotation efficiency, and reduces energy loss; the design of this device effectively solves the problems of sealing and rotation, improves stability, sealing and durability, and at the same time increases functionality and efficiency.

[0045] The above-mentioned dual-channel rotary sealing device, by setting an inlet joint 10, a first sealing ring 20, a second sealing ring 30, an outlet joint 40, a rotating head 50 and a double-axis rod 60, uses the inlet joint 10, the rotating head 50, the first sealing ring 20 and the double-axis rod 60 to build a first sealing channel, and the outlet joint 40, the double-axis rod 60, the rotating head 50 and the second sealing ring 30 to build a second sealing channel, and the sealing ring and the extruded double-axis rod 60 and the rotating head 50 have an interference fit to minimize the volume of the device, thereby reducing cell loss and maintaining fluid patency, and reducing frictional heat generation.

[0046] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A dual-channel rotary sealing device, characterized in that: include: An inlet joint, a first sealing ring, a second sealing ring, an outlet joint, a rotating head and a double-axis rod; a central channel and a peripheral channel are provided in the double-axis rod, the inlet joint is communicated with the central channel, the inner diameter of the first sealing ring is interference fit with the double-axis rod, and the outer diameter of the first sealing ring is interference fit with the rotating head; the outlet joint is communicated with the peripheral channel, the inner diameter of the second sealing ring is interference fit with the double-axis rod; the outer diameter of the second sealing ring is interference fit with the rotating head.

2. A dual-channel rotary sealing device according to claim 1, characterized in that: A slot is arranged in the rotating head, and the double-axis rod is inserted in the slot.

3. A dual-channel rotary sealing device according to claim 2, characterized in that: The double-axis rod comprises an inner rod and an outer rod, wherein the inner rod is inserted into the outer rod, and the inner wall of the outer rod and the outer wall of the inner rod are combined to form the peripheral channel; a central channel is arranged in the inner rod.

4. A dual-channel rotary sealing device according to claim 3, characterized in that: Both ends of the inner rod extend outwards to the outside of the outer rod respectively.

5. A dual-channel rotary sealing device according to claim 3, characterized in that: The second sealing ring is interference fit with the outer circumference of the outer rod.

6. A dual-channel rotary sealing device according to claim 3, characterized in that: The first sealing ring is interference fit with the outer circumference of the inner rod.

7. A dual-channel rotary sealing device according to claim 3, characterized in that: An upper bearing and a lower bearing are connected between the outer rod and the rotating head, and the upper bearing is located above the lower bearing.

8. A dual-channel rotary sealing device according to claim 7, characterized in that: The first sealing ring is located above the second sealing ring, and the second sealing ring is located above the upper bearing.

9. A dual-channel rotary sealing device according to claim 8, characterized in that: An outer liner ring and an inner liner ring are installed between the upper bearing and the lower bearing.

10. A dual-channel rotary sealing device according to claim 1, characterized in that: A cavity is connected below the double-shaft rod.

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