Sealing device and sealing assembly

Abstract

The utility model relates to a sealing device and a sealing assembly. In one aspect, the sealing device is used for being clamped between a first fixing part and a second fixing part so as to seal the space between an inner pipe and an outer pipe which are connected in a sleeved mode, the first fixing part is provided with a first through hole allowing the inner pipe to penetrate through, the second fixing part is arranged at the end of the outer pipe, and the second fixing part is provided with a second through hole allowing the inner pipe to penetrate through. And a second through hole corresponding to the end hole of the end part is formed. The sealing device is provided with a third through hole so that the sealing device can be arranged on the outer surface of the inner pipe in a sleeving mode through the third through hole, the sealing device comprises a first part and a second part, the first part and the second part are used for making contact with the first through hole and the second through hole respectively, and at least one of the first part and the second part comprises a first inclined face. And the first inclined surface is subjected to a force applied by the inner surface of at least one of the first through hole and the second through hole when the sealing device is clamped. Therefore, the sealing effect of the space between the inner pipe and the outer pipe can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of pipeline connection technology, and more specifically, to sealing devices and sealing components. Background Technology

[0002] Inner and outer pipe sleeve connection is a common pipe connection method. It achieves the connection by inserting the inner pipe into the inner pipe and fixing it in place, for example, by mechanical means. This sleeve structure is widely used in engineering applications such as connection, sealing, and power transmission.

[0003] Typically, gaskets are used to seal the space between the inner and outer pipes to prevent liquids such as water and corrosive media, or gases such as fuel gas, from entering or leaking into the space through the gap between the inner and outer pipes.

[0004] In this seal, the gasket typically achieves axial sealing by being clamped and radial sealing by an interference fit with the outer surface of the inner tube. However, the clamping force applied by the gasket to the outer surface of the inner tube through the interference fit is limited, especially when there is a large pressure difference between the space and the external environment of the outer tube, making it impossible to guarantee a radial seal. Utility Model Content

[0005] This section provides a general overview of this disclosure, rather than a full disclosure of the entire scope or all features of this disclosure.

[0006] The purpose of this disclosure is to provide a sealing device that can improve the sealing effect on the space between the inner and outer tubes of a sleeve.

[0007] To achieve the above objectives, according to one aspect of this disclosure, a sealing device is provided for being clamped between a first fixing portion and a second fixing portion to seal the space between a sleeved inner tube and an outer tube, wherein the first fixing portion has a first through hole for allowing the inner tube to pass through, and the second fixing portion is disposed at the end of the outer tube and has a second through hole corresponding to the end hole at the end.

[0008] The sealing device has a third through hole so that it can be fitted onto the outer surface of the inner tube through the third through hole, and the sealing device includes a first part and a second part for contacting the first through hole and the second through hole, respectively. At least one of the first part and the second part includes a first inclined surface, which is subjected to a force applied from the inner surface of at least one of the first through hole and the second through hole when the sealing device is clamped.

[0009] In some embodiments, the first bevel may contact the inner surface of at least one of the corresponding first and second through holes when the sealing device is clamped.

[0010] In some implementations, the sealing device can be axisymmetric about the central axis of the inner tube.

[0011] In some implementations, the first inclined plane can be a straight inclined plane or a convex arc-shaped inclined plane.

[0012] In some embodiments, the sealing device may include a protrusion that is located between the first through hole and the second through hole when the sealing device is clamped, and the distance of the protrusion from the central axis of the inner tube in the radial direction is greater than the maximum value of the distance of the first inclined surface from the central axis in the radial direction.

[0013] In some embodiments, at least one of the first portion and the second portion may include a protruding portion that may extend radially along the inner tube when the sealing device is clamped and may contact the end face of at least one of the first fixed portion and the second fixed portion.

[0014] In some embodiments, the inner surface of the fourth through hole may include a second inclined surface that can contact the first inclined surface when the sealing device is clamped, and both the first and second inclined surfaces are straight inclined surfaces with the same degree of inclination.

[0015] According to another aspect of this disclosure, a sealing assembly is also provided, comprising:

[0016] The first fixed part has a first through hole for allowing the inner tube to pass through;

[0017] The second fixing part is provided at the end of the outer tube and has a second through hole corresponding to the end hole at the end; and

[0018] According to any of the above embodiments, the sealing device has a first fixing portion and a second fixing portion that can clamp the sealing device therebetween for sealing.

[0019] In some embodiments, the inner surface of at least one of the first through hole and the second through hole may include a third bevel that can contact the sealing device when the sealing device is clamped.

[0020] In some implementations, the second fixing part can be an integral part of the outer tube.

[0021] According to the above technical solution, by including at least one of the first and second parts of the sealing device with a first inclined surface, when the first fixed part and the second fixed part clamp the sealing device, the sealing device can be simultaneously subjected to axial and radial forces via the first inclined surface. Thus, a good seal can be achieved between the inner and outer tubes in both the axial and radial directions. Attached Figure Description

[0022] The features and advantages of embodiments of the present disclosure will become more readily understood from the following description with reference to the accompanying drawings. The drawings are not drawn to scale and some features may be enlarged or reduced to show detail of specific parts. In the drawings:

[0023] Figure 1 The illustration schematically shows a case where the space between the inner and outer tubes is sealed using a sealing device based on related technology.

[0024] Figure 2 A sealing device according to a first embodiment of the present disclosure is shown schematically in operation.

[0025] Figure 3 It shows Figure 2 Local load distribution of the sealing device in the process.

[0026] Figure 4 for Figure 2 Another view of the sealing device in the image.

[0027] Figure 5 The sealing device according to the second embodiment of the present disclosure is shown schematically in operation.

[0028] Figure 6 The sealing device according to the third embodiment of the present disclosure is shown schematically in operation.

[0029] Figure 7 The sealing device according to the fourth embodiment of the present disclosure is shown schematically in operation.

[0030] Figure 8 The sealing device according to the fifth embodiment of the present disclosure is shown schematically in operation.

[0031] Figure 9 It shows Figure 8 Local load distribution of the sealing device in the process.

[0032] Figure 10 The sealing device according to the sixth embodiment of the present disclosure is shown schematically in operation.

[0033] Figure 11 The sealing device according to the seventh embodiment of the present disclosure is shown schematically in operation.

[0034] Figure 12 schematically shown Figure 11 The sealing device during installation.

[0035] Figure 13 It shows Figure 11Local load distribution of the sealing device in the process.

[0036] Figure 14 The sealing device according to the eighth embodiment of the present disclosure is shown schematically in operation.

[0037] Figure 15 schematically shown Figure 14 The sealing device during installation.

[0038] In the accompanying drawings, the same or corresponding technical features, parts or components are represented by the same or corresponding reference numerals. Detailed Implementation

[0039] The present disclosure will now be described in detail with reference to the accompanying drawings and exemplary embodiments. It should be noted that the following detailed description of the present disclosure is for illustrative purposes only and is not intended to limit the scope of the disclosure.

[0040] It should be noted that, for clarity, not all features of a particular embodiment are described or shown in the specification and drawings. Furthermore, to avoid unnecessary detail obscuring the technical solutions of interest in this disclosure, only the device structures and parts closely related to the technical solutions of this disclosure are described and shown in the specification and drawings, while other details that are not closely related to the technical content of this disclosure and are known to those skilled in the art are omitted. Additionally, the related technical sections reference... Figure 1 This is merely an illustrative example, and its technical features do not necessarily represent all manifestations of the prior art. Those skilled in the art should understand it comprehensively in conjunction with existing technical documents.

[0041] First, refer to Figure 1 The sealing device 10', which is used to seal the space between the inner tube 4' and the outer tube 5' according to related technologies, will be described in detail.

[0042] When the inner tube 4' and the outer tube 5' are connected, the inner tube 4' with a smaller diameter is inserted into the outer tube 5' with a larger diameter, thereby forming a space G' between the inner tube 4' and the outer tube 5'.

[0043] In related technologies, a first fixing part 20', a second fixing part 30', and a sealing device 10' are provided for sealing the space G'.

[0044] Specifically, the first fixing portion 20' has a first through hole 20'a for allowing the inner tube 4' to pass through. The second fixing portion 30' is shown as a flange portion, i.e., a flange, provided at the end of the outer tube 5', and has a second through hole 30'a corresponding to the end hole at that end. In this case, the end hole at that end is the end opening of the internal passage of the tubular body of the outer tube 5', and the second through hole 30'a is that end hole. However, it is conceivable that the second fixing portion 30' could also be a separate piece, for example, which could be connected to the end face of the outer tube 5' by means of welding, for example. In this case, the second through hole 30'a could, for example, connect to the end hole at that end.

[0045] The sealing device 10' has a third through hole 10'a, so that it can be sleeved on the outer surface 41' of the inner tube 4' through the third through hole 10'a.

[0046] In the working state, the first fixing part 20' can be connected to the second fixing part 30' by means of, for example, bolts, so as to axially clamp the sealing device 10' therebetween, thereby achieving a seal on the space G' between the sleeved inner tube 4' and the outer tube 5'.

[0047] In this seal, such as Figure 1 As shown, on one hand, the end 21' of the first fixing part 20' contacts the first end 101' of the sealing device 10' and applies an axial force F1 to it; on the other hand, the end 31' of the second fixing part 30' located at the end of the outer tube 5' contacts the second end 102' of the sealing device 10' opposite to the first end 101' and applies an axial force F1' opposite to the direction of the axial force F1. Under the action of the aforementioned axial forces F1 and F1', the sealing device 10' is pressed in the axial direction, thereby achieving a seal in the axial direction of the space G' between the inner tube 4' and the outer tube 5'. It should be noted that the radial direction and axial direction mentioned in the text refer to the inner tube or the outer tube.

[0048] However, in the radial direction, the sealing device 10' is not compressed by the first fixing part 20' and the second fixing part 30', but only contacts the outer surface 41' of the inner tube 4' through an interference fit. In this case, the sealing device 10' experiences limited force in the radial direction, and cannot provide a good sealing effect to the space G' in the radial direction. Especially when there is a large pressure difference between the space G' and the external environment of the outer tube 5', leakage is likely to occur.

[0049] In response, according to embodiments of this disclosure, a sealing device 10 is provided. Hereinafter, referring to... Figures 2 to 15 The sealing device 10 will be described in detail.

[0050] First, refer to Figure 2Similar to what has been discussed previously, the sealing device 10 is used to be clamped between the first fixing portion 20 and the second fixing portion 30 to seal the space G between the sleeved inner tube 4 and the outer tube 5. The first fixing portion 20 has a first through hole 20a for allowing the inner tube 4 to pass through, and the second fixing portion 30 is disposed at the end of the outer tube 5 and has a second through hole 30a corresponding to the end hole at that end.

[0051] The sealing device 10 has a third through hole 10a, so that it can be fitted onto the outer surface 41 of the inner tube 4 through the third through hole 10a.

[0052] The sealing device 10 includes a first part 11 and a second part 12, which are respectively used to contact the first through hole 20a and the second through hole 30a. That is, the first part 11 is... Figure 2 The sealing device 10 shown is located on the left side adjacent to the first through hole 20a, and the second part 12 is... Figure 2 The right side portion of the sealing device 10 shown is adjacent to the second through hole 30a.

[0053] In embodiments of this disclosure, at least one of the first portion 11 and the second portion 12 includes a first inclined surface 110, which is subjected to a force applied from the inner surface of at least one of the first through holes 20a and the second through holes 30a when the sealing device 10 is clamped.

[0054] For example, such as Figure 2 As shown, when only the first portion 11 includes the first inclined surface 110, when the sealing device 10 is clamped by the first fixing portion 20 and the second fixing portion 30, the second portion 12 is subjected to axial force and has an interference fit with the outer surface 41 of the inner tube 4 in the radial direction. However, for the first portion 11, as... Figure 3 As shown, its first inclined surface 110 is subjected to a force F applied by the inner surface of the first through hole 20a. Since the first inclined surface 110 is a surface inclined relative to the axial direction of the inner tube 4, the force F applied to the first inclined surface 110 has components that are parallel to and perpendicular to the axial direction of the inner tube 4, respectively, namely, the axial component F10 and the radial component F20.

[0055] In this configuration, in the axial direction, the sealing device 10 is still compressed by the first fixing portion 20 and the second fixing portion 30, thereby achieving a good seal for the space G in the axial direction. In the radial direction, in addition to the interference fit between the second portion 12 and the outer surface 41 of the inner tube 4, the sealing device 10 is also subjected to a radial component force F20 provided by the first fixing portion 20 at the first portion 11, thus applying a radial force F200 to the outer surface 41 of the inner tube 4. In this way, the sealing device 10 can make close contact with the outer surface 41 of the inner tube 4 in the radial direction, thereby enhancing the sealing effect on the space G in the radial direction.

[0056] Understandable, Figure 2 The view shown is only a cross-sectional view of the first inclined plane 110. In reality, the first inclined plane 110 can be an axisymmetric inclined plane about the central axis of the inner tube 4. For example, in Figure 2 In this case, the first inclined plane 110 is a hemispherical surface.

[0057] In addition, such as Figure 2 As shown, the inner surface of the first through hole 20a is cylindrical, and it contacts the first inclined surface 110 of the sealing device 10 through its edge. However, as Figure 4 As shown, the inner surface of the first through-hole 20a may also include a bevel (hereinafter referred to as the third bevel 201). In this case, the first fixing portion 20 can contact the sealing device 10 through the third bevel 201. In this way, the contact can be made more stable, and thus the sealing effect is better. Similarly, the inner surface of the second through-hole 30a may also include the third bevel 201 to achieve a similar effect, which will not be described in detail here.

[0058] It should be noted that when the inner surface of the first through hole 20a is cylindrical, a standard universal flange can be used as the first fixing part 20 with a cylindrical inner surface, thereby eliminating the need for additional processing steps on the flange by utilizing the standardized interface characteristics of the universal flange. It is easy to understand that when the inner surface of the second through hole 30a is cylindrical, a standard universal flange can also be used as the second fixing part 30 to eliminate the need for additional processing steps on the flange.

[0059] For example, such as Figure 5As shown, when only the second part 12 includes the first inclined surface 110, when the sealing device 10 is clamped by the first fixing part 20 and the second fixing part 30, the first part 11 is subjected to an axial force and has an interference fit with the outer surface 41 of the inner tube 4 in the radial direction. However, for the second part 12, its first inclined surface 110 is subjected to a force applied by the inner surface of the second through hole 30a. Similarly, since the first inclined surface 110 is a surface inclined relative to the axial direction of the inner tube 4, the force applied to the first inclined surface 110 also has an axial component and a radial component.

[0060] In this configuration, in the radial direction, in addition to the interference fit between the first part 11 and the outer surface 41 of the inner tube 4, the sealing device 10 is also subjected to a radial component force provided by the second fixed part 30 at the second part 12, and thus exerts a radial force on the outer surface 41 of the inner tube 4. In this way, the sealing device 10 can make close contact with the outer surface 41 of the inner tube 4 in the radial direction, thereby enhancing the sealing effect on the space G in the radial direction.

[0061] For example, such as Figures 6 to 8 As shown, when both the first part 11 and the second part 12 include the first inclined surface 110, when the sealing device 10 is clamped by the first fixing part 20 and the second fixing part 30, as Figure 9 As shown, the first inclined surface 110 of the first part 11 and the second part 12 are respectively subjected to forces F and F' applied by the inner surfaces of the first through hole 20a and the second through hole 30a, and forces F and F' each have axial and radial components, namely F1 and F2 and F1' and F2'.

[0062] In this case, in the radial direction, the sealing device 10 is subjected to radial components, namely F2 and F2', at both the first part 11 and the second part 12, and thus exerts a resultant force F200 on the outer surface 41 of the inner tube 4. In this way, the sealing device 10 can contact the outer surface 41 of the inner tube 4 more tightly in the radial direction, thereby more effectively enhancing the sealing effect on the space G in the radial direction.

[0063] Therefore, a good sealing effect can be achieved in both the radial and axial directions for the space G between the inner tube 4 and the outer tube 5.

[0064] In some implementations, such as Figure 2 As shown, the first inclined surface 110 can contact the inner surface of at least one of the corresponding through holes 20a and 30a when the sealing device 10 is clamped.

[0065] In other words, in, for example Figure 2 In the case shown, the first inclined surface 110 contacts the inner surface of the first through hole 20a, for example... Figure 5 In the case shown, the first inclined surface 110 contacts the inner surface of the second through hole 30a, and, for example... Figure 6 In the case shown, the first inclined surface 110 is in contact with the inner surfaces of both the first through hole 20a and the second through hole 30a.

[0066] In this way, the radial force on the sealing device 10 can be directly obtained to enhance the sealing effect on the space G in the radial direction.

[0067] In some implementations, such as Figure 2 As shown, the sealing device 10 can be axisymmetric about the central axis of the inner tube 4.

[0068] In this configuration, the sealing device 10 can maintain close contact with the outer surface 41 of the inner tube 4 throughout the entire circumferential direction to apply radial force. Furthermore, the radial force applied by the sealing device 10 is equal throughout this entire circumferential direction; that is, the radial force applied by the sealing device 10 to the outer surface 41 of the inner tube 4 is isotropically consistent. Therefore, the sealing effect of the sealing device 10 on the outer surface 41 of the inner tube 4 is isotropically consistent throughout this entire circumferential direction, thereby more effectively enhancing the sealing effect on the space G in the radial direction.

[0069] In some implementations, such as Figure 2 , Figure 5 and Figure 7 As shown, the first inclined plane 110 can be a straight inclined plane or a convex arc-shaped inclined plane.

[0070] "Straight" means that the outer contour of the cross-section of the first inclined surface 110 passing through the central axis of the inner tube 4 is straight. "Convex arc" means that the outer contour of the cross-section of the first inclined surface 110 passing through the central axis of the inner tube 4 is convex arc.

[0071] In this way, the first inclined surface 110 can easily fit with the inner surface of the first through hole 20a or the second through hole 30a, thereby facilitating the sealing of the sealing device 10 when it is clamped.

[0072] It is conceivable that the slope of the first inclined plane 110 can also be adjusted.

[0073] For example, if the first fixed portion 20 or the second fixed portion 30 includes a third inclined surface 201, the slope of the first inclined surface 110 can be adjusted so that the first inclined surface 110 can better cooperate with the third inclined surface 201. For example, if both the first inclined surface 110 and the third inclined surface 201 are straight inclined surfaces, the inclination of the first inclined surface 110 and the third inclined surface 201 can be made equal to obtain a larger contact area and thus a better sealing effect.

[0074] For example, such as Figure 10 As shown, when the first inclined surface 110 is an outwardly convex arc-shaped inclined surface, the height of the protrusion can be smaller, or the protrusion can be gentler, so as to obtain a larger contact area and thus obtain a better sealing effect.

[0075] In some implementations, such as Figure 6 As shown, the sealing device 10 may include a protrusion 120, which is located between the first through hole 20a and the second through hole 30a when the sealing device 10 is clamped, and the distance of the protrusion 120 from the central axis of the inner tube 4 in the radial direction is greater than the maximum value of the distance of the first inclined surface 110 from the central axis in the radial direction.

[0076] Because the distance of the protrusion 120 from the central axis of the inner tube 4 in the radial direction is greater than the maximum distance of the first inclined surface 110 from the central axis in the radial direction, an object that contacts the first inclined surface 110 and thereby applies a force to the first inclined surface 110 (e.g., Figure 6 When the first fixed portion 20 and the second fixed portion 30 may move on the first inclined surface 110 due to low friction, the protrusion 120 can block them to prevent them from moving away from the first inclined surface 110, thereby preventing the seal from being weakened or even damaged.

[0077] It is conceivable that, for example Figure 6 As shown, the protrusion 120 may be an annular protrusion extending around the entire outer periphery of the sealing device 10, so as to prevent the object that exerts force on the first inclined surface 110 from moving away from the first inclined surface 110 over the entire outer periphery of the sealing device 10.

[0078] In some implementations, such as Figure 4 , Figure 5 and Figure 14 As shown, at least one of the first portion 11 and the second portion 12 may include a protrusion 130 that extends radially along the inner tube 4 when the sealing device 10 is clamped and contacts the end face of at least one of the first fixing portion 20 and the second fixing portion 30.

[0079] like Figure 4 As shown, the protruding portion 130 extends radially along the inner tube 4 when the sealing device 10 is clamped and contacts the end face 301 of the second fixing portion 30. In this way, the force on the sealing device 10 in the axial direction can be increased, thereby improving the sealing effect on the space G in the axial direction.

[0080] In some implementations, such as Figure 2 As shown, the sealing device 10 can be integrally formed.

[0081] In this way, when the sealing device 10 is clamped, displacement or loosening between the parts of the sealing device 10 can be avoided, thereby avoiding sealing failure at the contact points of the parts that may result from this, and the sealing performance is more reliable.

[0082] In some implementations, refer to Figures 11 to 15 The sealing device 10 includes a first sealing device 13 and a second sealing device 14. The first sealing device 13 includes a third through hole 10a and a first inclined surface 110. The second sealing device 14 includes a fourth through hole 10b. The second sealing device 14 can be sleeved on the first inclined surface 110 through the fourth through hole 10b and contact the inner surface of at least one of the corresponding first through hole 20a and second through hole 30a when the sealing device 10 is clamped.

[0083] In this case, when the sealing device 10 is clamped, the inner surface of at least one of the corresponding through holes 20a and 30a can exert a force on the first inclined surface 110 via the second sealing device 14.

[0084] For example, such as Figure 11 and Figure 13 As shown, when the sealing device 10 is clamped by the first fixing part 20 and the second fixing part 30, for the first part 11 of the sealing device 10, similar to what has been described before, the first inclined surface 110 of the first part 11 is directly subjected to a force F applied by the inner surface of the first through hole 20a. For the second part 12 of the sealing device 10, the first inclined surface 110 of the second part 12 is subjected to a force F'' applied by the inner surface of the second through hole 30a via the second sealing device 14.

[0085] Since the first inclined surface 110 is axially inclined relative to the center of the inner tube 4, both forces F and F'' have axial and radial components, namely F1 and F2, and F1'' and F2''. In this case, in the radial direction, the sealing device 10 is subjected to radial components, namely F2 and F2'', at both the first part 11 and the second part 12, and thus exerts a resultant force F200' on the outer surface 41 of the inner tube 4.

[0086] In this way, the sealing device 10 can make closer contact with the outer surface 41 of the inner tube 4 in the radial direction, thereby more effectively enhancing the sealing effect on the space G in the radial direction. Furthermore, this split-type sealing device 10 can be used to seal the space G formed when inner tubes 4 and outer tubes 5 of different sizes and specifications are fitted together. For example, for inner tubes 4 and outer tubes 5 of different sizes, a first sealing device 13 of the same size can be used, along with a second sealing device 14 of a suitable size, so that the first part 11 and the second part 12 of the sealing device 10 can respectively seal the first through hole 20a and the second through hole 30a when the sealing device 10 is clamped.

[0087] It is conceivable that the second sealing device 14 could be a single component, for example... Figure 11 and Figure 12 The configuration shown is intended for use only with one of the first through-hole 20a and the second through-hole 30a. However, the second sealing device 14 can also be two components, for example... Figure 14 and Figure 15 The situation shown is used to mate the first through hole 20a and the second through hole 30a respectively.

[0088] like Figure 11 As shown, both the first portion 11 and the second portion 12 include a first inclined surface 110, and only one of the first inclined surface 110 of the first portion 11 and the first inclined surface 110 of the second portion 12 contacts the inner surface of the corresponding one of the first through holes 20a and 30a when the sealing device 10 is clamped. In this case, the second sealing device 14 can be sleeved on the first inclined surface 110 that does not contact the inner surface of the other of the first through holes 20a and 30a via the fourth through hole 10b, and contact that inner surface.

[0089] In some implementations, such as Figure 11 and Figure 12 As shown, the inner surface of the fourth through hole 10b may include a second inclined surface 140, which contacts the first inclined surface 110 when the sealing device 10 is clamped, and both the first inclined surface 110 and the second inclined surface 140 are straight inclined surfaces with the same degree of inclination.

[0090] In this case, when the sealing device 10 is clamped, a larger contact area can be obtained between the first sealing device 13 and the second sealing device 14, thereby effectively preventing displacement or loosening between the first inclined surface 110 and the second inclined surface 140, and thus obtaining a better sealing effect.

[0091] In some embodiments, the sealing device 10 may be made of any one of a metallic material, a polymeric material, and a rubber material.

[0092] According to another aspect of this disclosure, a sealing assembly 1 is also provided for sealing the space G between the sleeved inner tube 4 and the outer tube 5.

[0093] Sealing assembly 1 includes:

[0094] The first fixed portion 20 has a first through hole 20a for allowing the inner tube 4 to pass through;

[0095] The second fixing part 30 is provided at the end of the outer tube 5 and has a second through hole 30a corresponding to the end hole at that end; and

[0096] The sealing device 10, with a first fixing part 20 and a second fixing part 30, is capable of clamping the sealing device 10 therebetween to achieve a seal.

[0097] In some implementations, such as Figure 4 As shown and as previously mentioned, the inner surface of at least one of the first through hole 20a and the second through hole 30a may include a third bevel 201, which contacts the sealing device 10 when the sealing device 10 is clamped.

[0098] As mentioned earlier, this increases the contact area between the inner surfaces of the first through hole 20a and the second through hole 30a and the sealing device 10, thereby improving the stability of the contact and thus enhancing the sealing effect.

[0099] In addition, as mentioned earlier, for cases where the inner surfaces of the first through hole 20a and the second through hole 30a are cylindrical, standard universal flanges can be used as the first fixing part 20 and the second fixing part 30 with cylindrical inner surfaces, thereby eliminating the need for additional processing procedures on the flanges by utilizing the standardized interface characteristics of universal flanges.

[0100] It is conceivable that the second fixing part 30 can be an integral part of the outer tube 5. For example, it can be integrally formed with the tubular body of the outer tube 5, or it can be connected to the outer tube 5 by means such as welding.

[0101] However, it is conceivable that the second fixing part 30 could also be a separate component independent of the outer tube 5. In this case, the second fixing part 30 would only be installed at the end of the outer tube by means of welding, for example, when it is necessary to seal the space between the outer tube and the inner tube.

[0102] While this disclosure has been described with reference to exemplary embodiments, it should be understood that this disclosure is not limited to the specific embodiments described and shown herein. Various changes to the exemplary embodiments can be made by those skilled in the art without departing from the scope defined by the claims of this disclosure.

[0103] The features mentioned and / or shown in the foregoing description of exemplary embodiments of this disclosure may be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. Such combinations or substitutions should also be considered as including within the scope of protection of this disclosure.

Claims

1. A sealing device for being clamped between a first fixed portion and a second fixed portion to seal the space between a sleeved inner tube and an outer tube, wherein, The first fixing portion has a first through hole for allowing the inner tube to pass through, and the second fixing portion is disposed at the end of the outer tube and has a second through hole corresponding to the end hole at the end, characterized in that... The sealing device has a third through hole so that it can be fitted onto the outer surface of the inner tube through the third through hole, and the sealing device includes a first part and a second part, the first part and the second part being respectively used to contact the first through hole and the second through hole, at least one of the first part and the second part including a first inclined surface, the first inclined surface being subjected to a force applied from the inner surface of at least one of the first through hole and the second through hole when the sealing device is clamped.

2. The sealing device according to claim 1, characterized in that, The first inclined surface contacts the inner surface of at least one of the corresponding through holes and the second through hole when the sealing device is clamped.

3. The sealing device according to claim 1, characterized in that, The first inclined plane is a straight inclined plane or an outwardly convex arc-shaped inclined plane.

4. The sealing device according to claim 1, characterized in that, The sealing device includes a protrusion located between the first through hole and the second through hole when the sealing device is clamped, and the distance of the protrusion from the central axis of the inner tube in the radial direction is greater than the maximum value of the distance of the first inclined surface from the central axis in the radial direction.

5. The sealing device according to claim 1, characterized in that, At least one of the first portion and the second portion includes a protruding portion that extends radially along the inner tube when the sealing device is clamped and contacts the end face of at least one of the first fixing portion and the second fixing portion.

6. The sealing device according to claim 1, characterized in that, The sealing device includes a first sealing device and a second sealing device. The first sealing device includes the third through hole and the first inclined surface. The second sealing device includes a fourth through hole. The second sealing device can be sleeved on the first inclined surface through the fourth through hole and contact the inner surface of at least one of the corresponding first through hole and the second through hole when the sealing device is clamped.

7. The sealing device according to claim 6, characterized in that, The inner surface of the fourth through hole includes a second inclined surface, which contacts the first inclined surface when the sealing device is clamped, and both the first and second inclined surfaces are straight inclined surfaces with the same degree of inclination.

8. A sealing assembly for sealing the space between a sleeved inner tube and an outer tube, characterized in that, include: The first fixing portion has a first through hole for allowing the inner tube to pass through; The second fixing part is disposed at the end of the outer tube and has a second through hole corresponding to the end hole at the end; and According to any one of claims 1 to 7, the first fixing portion and the second fixing portion are capable of clamping the sealing device therebetween to perform the sealing.

9. The sealing assembly according to claim 8, characterized in that, The inner surface of at least one of the first through hole and the second through hole includes a third inclined surface, which contacts the sealing device when the sealing device is clamped.

10. The sealing assembly according to claim 8, characterized in that, The second fixing part is an integral part of the outer tube.

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