Flexible endoscope seal structure and sealing method

Abstract

The present application relates to the technical field of mechanical seal, particularly relates to a soft endoscope sealing structure and sealing method. The present application discloses a kind of soft endoscope sealing structure, including first connecting piece and second connecting piece, first connecting piece includes the first sealing portion of taper design, the outside of first sealing portion is equipped with the installation groove with taper surface, sealing ring is arranged in installation groove, second connecting piece includes the second sealing portion matched with the taper of first sealing portion. The present application solves the problem that the parting flash of sealing ring is easy to cause leakage in the existing radial sealing mode. The present application adopts the sealing effect of slope structure cooperation rubber ring, avoids rubber ring parting surface, so that the sealing effect is better.

Description

Technical Field

[0001] This invention relates to the field of mechanical seal technology, and in particular to a flexible endoscope sealing structure and sealing method. Background Technology

[0002] In the connection of flexible endoscopes, it is often necessary to ensure the airtightness of the component connections. For example... Figure 1 As shown, the existing sealing method uses radial sealing, which involves placing an elastic sealing ring 4 between the two parts to be connected (outer tube and inner tube), utilizing the deformation of the sealing ring to achieve a seal. However, the existing sealing method is prone to leakage, mainly due to inherent limitations in the precision and integrity of the sealing ring. Figure 2 As shown, ordinary sealing rings 4 are mostly rubber rings. The parting surface of the rubber ring is a flat parting line, and it is generally formed by vulcanization. During the production of rubber rings, burrs 41 are easily left on the inner and outer diameters. When using radial sealing, the burrs are exactly where they contact the two parts to be connected, causing poor contact and leakage. Although the burrs can be processed, the process can easily cause defects in the inner or outer diameter, further increasing the probability of leakage. Therefore, regardless of whether there are burrs or defects, an ideal sealing effect cannot be achieved. On the other hand, low concentricity between the two parts to be connected also leads to problems such as inconvenient assembly.

[0003] Therefore, those skilled in the art are dedicated to developing a flexible endoscope sealing structure that can avoid leakage problems caused by the parting flash of the sealing ring. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the present invention discloses a flexible endoscope sealing structure and sealing method. The technical problem to be solved is that in the existing radial sealing method, the parting flash of the sealing ring is prone to causing leakage.

[0005] To achieve the above objectives, the present invention provides a flexible endoscope sealing structure, including a first connector and a second connector. The first connector includes a first sealing part with a tapered design, and an installation groove with a tapered surface is provided on the outer side of the first sealing part. A sealing ring is provided in the installation groove. The second connector includes a second sealing part that tapers with the first sealing part.

[0006] Preferably, the first sealing portion includes a first conical portion and a second conical portion. The first conical portion is located at the end of the first sealing portion, the angle of the first conical portion is smaller than the angle of the second conical portion, and the first conical portion extends radially beyond the second conical portion, thus forming the mounting groove between the first conical portion and the second conical portion. The second sealing portion includes a first conical inner ring and a second conical inner ring. The first conical inner ring mates with the first conical portion, and the second conical inner ring mates with the second conical portion on which the sealing ring is fitted.

[0007] Preferably, the second conical portion is connected to a first fixing portion, and the second sealing portion is surrounded by a second fixing portion, with the first fixing portion and the second fixing portion being fixedly connected. The fixed connection can be achieved using screws or adhesive bonding, among other methods.

[0008] Preferably, the first cone and the first conical inner ring have the same angle; the second cone and the second conical inner ring have the same angle.

[0009] Preferably, the angle α between the first cone and the first conical inner ring is 40-50°, with the best effect achieved when the angle α is 45°.

[0010] Preferably, the angle β between the second cone and the second conical inner ring is 90-100°, with the best effect achieved when the angle β is 90°.

[0011] The present invention also provides a sealing method, comprising the following steps:

[0012] 1) Provide a first connector and a second connector, wherein the first connector is provided with a first sealing part and the second connector is provided with a second sealing part, and the first sealing part and the second sealing part are taper-fitted;

[0013] 2) A sealing ring is fitted over the first sealing part, and the axial tapered part of the first sealing part is fitted into the second sealing part; an axial force is provided so that the outer sealing surface of the sealing ring is pressed by the inclined surface of the second sealing part.

[0014] Preferably, a mounting groove is provided on the outer side of the first sealing part, and the inner sealing surface of the sealing ring is contacted and pressed by the inclined surface of the mounting groove. Specifically, the first connecting member can be fastened to the second connecting member with a fastener, so that the inner sealing surface and the outer sealing surface of the sealing ring are respectively subjected to the inclined pressure of the mounting groove and the second sealing part, and the sealing ring deforms to achieve sealing.

[0015] The beneficial effects of this invention are:

[0016] The sealing effect is achieved by using a tapered connection between the first and second connecting parts and a beveled structure with a sealing ring. Because the first sealing part where the sealing ring is installed has a taper, it avoids the parting surface of the sealing ring, resulting in a better seal. Simultaneously, the tapered fit between the first and second connecting parts ensures a precise fit and concentricity, facilitating assembly. This sealing structure is suitable for all radial seals or seals requiring high concentricity on flexible endoscopes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a radial seal using existing technology;

[0018] Figure 2 This is a schematic diagram of the overall and cross-sectional structure of the existing rubber ring;

[0019] Figure 3 This is an exploded cross-sectional view of a specific embodiment of the present invention;

[0020] Figure 4 This is a front view of an exploded sectional view of a specific embodiment of the present invention;

[0021] Figure 5 This is a partial structural diagram of an exploded cross-sectional view of a specific embodiment of the present invention;

[0022] Figure 6 This is an assembly cross-sectional view of a specific embodiment of the present invention;

[0023] Figure 7 yes Figure 6 A magnified view of a portion of point A in the middle.

[0024] In the above figures: 1. First connecting member; 11. First sealing part; 111. First cone part; 112. Second cone part; 113. Mounting groove; 12. First fixing part; 2. Second connecting member; 21. Second sealing part; 211. First conical inner ring; 212. Second conical inner ring; 22. Second fixing part; 3. Sealing ring. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific manner. Therefore, they should not be construed as limitations on the present invention. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] like Figures 3 to 5 As shown, the present invention provides a flexible endoscope sealing structure, including a first connector 1 and a second connector 2. The first connector 1 includes a first sealing part 11 with a tapered design. The outer side of the first sealing part 11 is provided with a mounting groove 113 with a tapered surface. A sealing ring 3 is provided in the mounting groove 113. The second connector 2 includes a second sealing part 21 that is taperedly engaged with the first sealing part 11.

[0027] In the above embodiments, the sealing effect is achieved by using a tapered connection between the first connector 1 and the second connector 2, and a sloped structure in conjunction with the sealing ring 3. Because the first sealing part 11, where the sealing ring 3 is installed, has a taper, it avoids the parting surface of the sealing ring 3, resulting in a better sealing effect. Simultaneously, the tapered fit between the first connector 1 and the second connector 2 also achieves a precise fit and concentricity, facilitating assembly. The sealing structure of this invention is suitable for all radial seals or seals requiring high concentricity on flexible endoscopes.

[0028] like Figure 4 and Figure 5 As shown, the first sealing portion 11 includes a first conical portion 111 and a second conical portion 112. The first conical portion 111 is located at the end of the first sealing portion 11, and the angle of the first conical portion 111 is smaller than the angle of the second conical portion 112. The first conical portion 111 extends radially beyond the second conical portion 112, thus forming a mounting groove 113 between the first conical portion 111 and the second conical portion 112. The second sealing portion 21 includes a first conical inner ring 211 and a second conical inner ring 212. The first conical inner ring 211 mates with the first conical portion 111, and the second conical inner ring 212 mates with the second conical portion 112 to which the sealing ring 3 is fitted. Meanwhile, as... Figures 5 to 6 As shown, the second conical portion 112 is connected to the first fixing portion 12, and the second sealing portion 21 is surrounded by the second fixing portion 22. The first fixing portion 12 and the second fixing portion 22 are fixedly connected. The fixed connection can be achieved by screw connection or adhesive connection, etc.

[0029] Furthermore, the first cone 111 and the first conical inner ring 211 have the same angle; the second cone 112 and the second conical inner ring 212 have the same angle. The angle α between the first cone 111 and the first conical inner ring 211 is 40–50°, with the best effect achieved when the angle α is 45°. The angle β between the second cone 112 and the second conical inner ring 212 is 90–100°, with the best effect achieved when the angle β is 90°.

[0030] like Figure 6 and Figure 7 As shown, the present invention also provides a sealing method, comprising the following steps:

[0031] 1) Provide a first connector 1 and a second connector 2, the first connector 1 is provided with a first sealing part 11, the second connector 2 is provided with a second sealing part 21, the first sealing part 11 and the second sealing part 21 can be taper-fitted;

[0032] 2) A sealing ring 3 is fitted over the first sealing part 11, and the first sealing part 11 is axially tapered and fitted inside the second sealing part 21; an axial force is provided. In this embodiment, the first connecting member 1 is fastened to the second connecting member 2 with fasteners, so that the outer sealing surface of the sealing ring 3 is contacted and squeezed by the inclined surface of the second sealing part 21. At the same time, an installation groove 113 is provided on the outer side of the first sealing part 11, and the inner sealing surface of the sealing ring 3 is contacted and squeezed by the inclined surface of the installation groove 113.

[0033] Specifically, bolts can be used to fasten the first connecting member 1 to the second connecting member 2, so that the inner sealing surface and the outer sealing surface of the sealing ring 3 are subjected to the oblique pressure of the mounting groove 113 and the second sealing part 21, respectively, causing the sealing ring 3 to deform and achieve sealing. By combining axial force with tapered fit, the traditional radial sealing method is changed to tapered sealing. By squeezing the sealing ring 3 with an oblique surface, not only are the flashes on the parting surface of the sealing ring 3 avoided, but the direction of force can also be changed through oblique contact, so that the sealing ring 3 is subjected to both radial and axial forces at the same time, thereby increasing the sealing effect.

[0034] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A sealing structure for a flexible endoscope, characterized in that: The first connector (1) includes a first sealing part (11) with a tapered design. The outer side of the first sealing part (11) is provided with a mounting groove (113) with a tapered surface. A sealing ring (3) is provided in the mounting groove (113). The second connector (2) includes a second sealing part (21) that tapers with the first sealing part (11). The first sealing part (11) includes a first conical part (111) and a second conical part (112), and the mounting groove (113) is formed between the first conical part (111) and the second conical part (112); the second sealing part (21) includes a first conical inner ring (211) and a second conical inner ring (212), the first conical inner ring (211) cooperates with the first conical part (111), and the second conical inner ring (212) cooperates with the second conical part (112) on which the sealing ring (3) is sleeved; The second cone (112) is connected to the first fixing part (12), and the second sealing part (21) is surrounded by the second fixing part (22). The first fixing part (12) and the second fixing part (22) are fixedly connected. The first cone (111) and the first conical inner ring (211) have the same angle; the second cone (112) and the second conical inner ring (212) have the same angle; the angle α of the first cone (111) and the first conical inner ring (211) is 40-50°; the angle β of the second cone (112) and the second conical inner ring (212) is 90-100°, so as to avoid the parting surface of the sealing ring (3).

2. A sealing method applied to the flexible endoscope sealing structure of claim 1, characterized in that: The steps include the following: 1) Provide a first connector (1) and a second connector (2), wherein the first connector (1) is provided with a first sealing part (11) and the second connector (2) is provided with a second sealing part (21), and the first sealing part (11) and the second sealing part (21) are taper-fitted; 2) A sealing ring (3) is fitted over the first sealing part (11) and the first sealing part (11) is axially tapered and fitted inside the second sealing part (21); an axial force is provided so that the outer sealing surface of the sealing ring (3) is pressed by the inclined surface of the second sealing part (21); An installation groove (113) is provided on the outer side of the first sealing part (11), and the inner sealing surface of the sealing ring (3) is pressed by the inclined surface of the installation groove (113); The first sealing part (11) includes a first conical part (111) and a second conical part (112), and the mounting groove (113) is formed between the first conical part (111) and the second conical part (112); the second sealing part (21) includes a first conical inner ring (211) and a second conical inner ring (212), the first conical inner ring (211) cooperates with the first conical part (111), and the second conical inner ring (212) cooperates with the second conical part (112) on which the sealing ring (3) is sleeved.

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