Split conduit interface seal and method of assembly

Abstract

The present application relates to the technical field of pipeline interface sealing, and particularly relates to a split type pipeline interface sealing device, which is used for arranging a sealing rubber ring at a butt joint position of a pipe socket and a pipe spigot, the sealing rubber ring is of a split structure, and includes a hard rubber support part and a soft rubber part with different hardnesses, the soft rubber part is arranged inward, and the hard rubber support part is arranged outward; the hard rubber support part is used for being embedded into a groove in an inner wall of the pipe socket, and the soft rubber part is compressed between an inner sealing surface of the pipe socket and an outer wall of the pipe spigot to form interface sealing; a contact surface of the hard rubber support part and the soft rubber part is a bevel; the split structure realizes functional division of support and sealing, the hard rubber support part realizes reliable positioning by rigidity, and avoids displacement and rolling of the rubber ring during installation; and the technical problem that the hardness of the sealing rubber ring cannot be accurately set in the prior art, and the rubber ring is prone to displacement and rolling during installation is solved.

Description

Technical Field

[0001] This invention relates to the field of pipe joint sealing technology, specifically to a split-type pipe joint sealing device and its assembly method. Background Technology

[0002] Pipeline joint sealing devices are core components in fluid transportation networks, ensuring joint sealing and preventing media leakage. Their sealing performance directly determines the operational safety, stability, and service life of water supply, heating, and gas pipeline systems, making them indispensable basic accessories in the fluid transportation field. This device mainly consists of a pipe socket, a pipe spigot, and a sealing ring. The core sealing element, the sealing ring, is embedded in a dedicated sealing groove on the inner wall of the pipe socket, relying on the groove for precise positioning and preventing displacement or slippage during assembly and operation. When the pipe spigot is inserted into the pipe socket to complete the assembly, the sealing ring undergoes elastic deformation under the bidirectional compression of the inner wall of the pipe socket and the outer wall of the pipe spigot, tightly filling the sealing gap between the joints and forming a sealed fluid barrier, effectively preventing leakage of media such as water, steam, and gas. Simultaneously, the sealing ring possesses excellent elastic adaptability, capable of accommodating micro-displacements caused by thermal expansion and contraction of the pipeline, foundation settlement, and operational vibration, always maintaining the integrity of the sealing structure.

[0003] For example, patent document CN109667934B discloses a pipe joint sealing device and its preparation method. The device includes a pipe socket, a pipe spigot, and a sealing ring placed at their joint. The sealing ring is integrally molded and has a uniform hardness throughout. The medium contact surface of the sealing ring is a bevel or corrugated surface. In use, a groove matching the shape of the sealing ring is formed on the pipe socket. During the insertion of the pipe spigot, the sealing ring is compressed and deformed, ultimately achieving a sealed connection of the pipe. The entire device significantly reduces installation resistance while ensuring a sealing effect, providing great convenience for construction.

[0004] However, the above-mentioned pipe interface sealing devices still have certain shortcomings in use: the one-piece molded sealing ring with uniform hardness throughout cannot achieve hardness zoning and functional division. If the hardness is too high, the ring will lack elasticity, resulting in high compression resistance during installation, making it difficult to assemble large-diameter pipes, and causing poor sealing surface fit, which can easily lead to micro-leakage. If the hardness is too low, the support rigidity will be insufficient, and the ring will easily shift or roll over from the socket groove under the action of installation thrust or medium pressure, losing its positioning and sealing capabilities. Summary of the Invention

[0005] This invention provides a split-type pipe interface sealing device to solve the technical problem in the prior art where the hardness of the sealing ring cannot be accurately set, which easily leads to high compression resistance and easy displacement and roll-up of the sealing ring during installation; the purpose of this invention is also to provide an assembly method for the split-type pipe interface sealing device.

[0006] To solve the above problems, the split-type pipe interface sealing device provided by the present invention adopts the following technical solution: A split-type pipe joint sealing device includes a sealing ring for placement at the joint of a pipe socket and a pipe spigot. The sealing ring is a split structure, comprising a hard rubber support part and a soft rubber part with different hardnesses. The soft rubber part is arranged inward, and the hard rubber support part is arranged outward. The hard rubber support is used to be embedded in the groove of the inner wall of the pipe socket, and the soft rubber is compressed between the inner sealing surface of the pipe socket and the outer wall of the pipe insertion to form an interface seal. The contact surface between the hard rubber support and the soft rubber is an inclined surface.

[0007] The beneficial effects of the above technical solution are as follows: the split structure realizes the functional division of support and sealing. The rigid rubber support part relies on rigidity to achieve reliable positioning and avoid the rubber ring from shifting or rolling up during installation. The soft rubber part achieves efficient sealing with its elasticity, which can reduce the compression resistance when the pipe is inserted and is suitable for the installation of large-diameter pipes. The inclined contact surface between the rigid rubber and the soft rubber forms a smooth transition, which effectively disperses the interface stress during installation and pressure bearing, and avoids stress concentration, tearing and delamination at the junction of the rigid and soft rubber. At the same time, the inclined surface has a guiding function, further reducing the installation resistance.

[0008] Furthermore, the soft rubber part includes a first soft rubber part and a second soft rubber part. The first soft rubber part contacts the hard rubber support part, and both of them have the inclined surface at the contact points. The second soft rubber part is used to contact the medium inside the pipe and form an auxiliary seal.

[0009] Furthermore, the contact surface between the first soft rubber part and the second soft rubber part is a curved surface.

[0010] The beneficial effects of the above technical solution are: the curved surface can effectively eliminate the sharp corners and stress concentration points at the junction of the first and second soft rubber parts. Under long-term working conditions such as pipeline installation extrusion, medium pressure impact, and temperature cycle deformation, the curved transition structure can evenly distribute the stress and avoid fatigue failure problems such as cracks and fractures at the junction.

[0011] Furthermore, the side of the first soft rubber portion facing the second soft rubber portion is a convex arc surface, and the side of the second soft rubber portion facing the first soft rubber portion is a concave arc surface. The convex arc surface and the concave arc surface cooperate to form a curved surface structure of the type between the first soft rubber portion and the second soft rubber portion.

[0012] The beneficial effects of the above technical solution are: the matching method of concave and convex arc surfaces increases the contact area of ​​the two soft rubber parts, making the bond stronger. During installation, it guides the soft rubber parts to compress evenly, and when under pressure, it efficiently transmits the medium pressure to the sealing surface, which not only ensures smooth installation but also enhances the sealing effect. At the same time, it makes the deformation coordination of the two soft rubber parts stronger, avoiding local deformation imbalance that leads to sealing failure.

[0013] Furthermore, the side of the second soft rubber portion facing the medium inside the tube is defined as the medium contact surface, and the medium contact surface is a type of structure formed by an inclined surface or a wavy surface.

[0014] The beneficial effect of the above technical solution is that when the medium pressure acts on the inclined or corrugated surface, it will push the < type of structure to fit the cover more tightly, achieving a self-pressurizing effect where the higher the pressure, the tighter the seal.

[0015] Furthermore, in the sealing ring, the radial section height of the first soft rubber part is defined as H1, the radial section height of the second soft rubber part is defined as H2, and the height between the upper and lower contact points of the first and second soft rubber parts in the radial direction is defined as H3. The ratio R1 of H1 and H2 satisfies 0.6≤R1≤2.5 and H3≤H1.

[0016] The beneficial effects of the above technical solution are: a reasonable height ratio can ensure that the soft rubber part obtains the optimal compression amount, which avoids the increase in installation resistance and overload aging of the rubber ring due to excessive compression amount, and also prevents insufficient compression amount from causing sealing leakage.

[0017] Furthermore, a sealing gap is formed between the inner sealing surface of the pipe socket and the outer wall of the pipe inlet, and the soft rubber part is compressed and filled into the sealing gap.

[0018] Furthermore, the sealing gap is defined as G, and H1 is greater than the value of G, so that the sealing ring obtains initial sealing force after installation.

[0019] The beneficial effects of the above technical solution are: it allows the sealing ring to form an initial sealing force immediately after installation, without relying on the pressure of the medium inside the pipe, and can establish a basic seal simply by assembly compression, achieving zero start-up leakage.

[0020] Furthermore, the upper and lower surfaces of the radial section of the second soft rubber part are both inclined surfaces, arranged at an angle to the horizontal line.

[0021] The beneficial effects of the above technical solution are: the inclined structure can convert radial pressure into positive force that adheres tightly to the cover, further enhancing the self-reinforcing sealing effect, while making the deformation of the second soft rubber part more uniform, improving structural stability and durability.

[0022] Furthermore, the hardness of the hard rubber support portion is greater than the hardness of the soft rubber portion, and the hardness of the second soft rubber portion is not less than the hardness of the first soft rubber portion.

[0023] The advantages of the split-type pipe interface sealing device provided by this invention are as follows: The split-type sealing ring, by setting a hard rubber support part and a soft rubber part with different hardnesses, achieves separation of support positioning and sealing functions; the hard rubber support part and the soft rubber part adopt a beveled transition, and the first soft rubber part and the second soft rubber part adopt a curved surface connection. Combined with the "<"-shaped medium contact surface structure of the second soft rubber part, this reduces the installation resistance during pipe insertion and avoids stress concentration, tearing, and ring displacement / rolling at various joints; simultaneously, by limiting the sealing height, cross-sectional dimensions, and sealing gap, the soft rubber part can form a stable initial sealing force after installation and achieve a self-reinforcing sealing effect under medium pressure. This improves the reliability and durability of the interface seal, saves on rubber material usage, and better meets the long-term stable operation requirements of water supply, heating, and other pipelines in high-temperature, high-pressure, and large-diameter assembly scenarios.

[0024] To solve the above problems, the assembly method of the split-type pipe interface sealing device provided by the present invention adopts the following technical solution: An assembly method for a split-type pipe interface sealing device, which utilizes the aforementioned split-type pipe interface sealing device, includes the following steps: S1: Using materials with different hardness, a whole piece of colloid is prepared to form a sealing ring. A hard rubber support is formed at one end of the sealing ring, and a first soft rubber part and a second soft rubber part are formed at the other end. The hard rubber support part and the first soft rubber part are in contact through an inclined surface, and the first soft rubber part and the second soft rubber part are in contact through a curved surface. The side of the second soft rubber part facing the medium is an inclined surface or a wavy surface. S2: Machining the shape of each part on the pipe socket that mates with the sealing ring, and machining a groove and inner sealing surface on the inner wall of the pipe socket that match the shape of the hard rubber support; S3: Embed the hard rubber support part of the sealing ring into the groove, insert the pipe socket into the pipe socket along the inner circumference of the sealing ring, so that the sealing ring is in close contact with the outer wall of the pipe socket, and then push the pipe socket in the insertion direction until the pipe socket is firmly sealed and connected with the sealing ring and the pipe socket.

[0025] The beneficial effects of the assembly method of the split-type pipe interface sealing device provided by the present invention are as follows: The sealing ring adopts a split structure, and by setting a hard rubber support part and a soft rubber part with different hardnesses, the support positioning and sealing functions are separated; the hard rubber support part and the soft rubber part adopt a beveled transition, and the first soft rubber part and the second soft rubber part adopt a curved surface connection, which reduces the installation resistance during pipe insertion and avoids stress concentration, tearing, and ring displacement / rolling at various joints; the soft rubber part can form a stable initial sealing force after installation and achieve a self-reinforcing sealing effect under the action of medium pressure, which improves the reliability and durability of the interface seal, saves the amount of rubber material used, and can better adapt to the long-term stable operation requirements of water supply, heating, and other pipelines in high-temperature, high-pressure, and large-diameter assembly scenarios. Attached Figure Description

[0026] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 This is a cross-sectional view of the split-type pipe interface sealing device provided by the present invention; Figure 2 A cross-sectional view of the split-type pipe interface sealing device provided by the present invention in application; Figure 3 This is a cross-sectional view of the pipe socket in this invention; Figure 4 This is a cross-sectional view of the tube socket in this invention.

[0027] Explanation of reference numerals in the attached figures: 1. Pipe socket; 2. Pipe spigot; 3. Sealing ring; 4. Hard rubber support; 5. Soft rubber part; 6. Groove; 7. Inner sealing surface; 8. Inclined surface; 9. First soft rubber part; 10. Second soft rubber part; 11. Outer convex arc surface; 12. Inner concave arc surface; 13. Medium contact surface; 14. Inclined surface. Detailed Implementation

[0028] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0029] An embodiment of the split-type pipe interface sealing device provided by the present invention: like Figures 1 to 4As shown, the split-type pipe joint sealing device is used in conjunction with the pipe socket 1 and the pipe spigot 2. It includes a sealing ring 3 for placement at the joint position of the pipe socket 1 and the pipe spigot 2. The sealing ring 3 is a split structure, which includes a hard rubber support part 4 and a soft rubber part 5 with different hardness. The soft rubber part 5 is arranged inward, and the hard rubber support part 4 is arranged outward.

[0030] like Figures 1 to 3 As shown, the inner wall of the pipe socket 1 is provided with a groove 6. The groove 6 is for the hard rubber support part 4 to be inserted to quickly position the entire sealing ring 3. Since the groove 6 provides installation positioning and limiting space, during the installation of the sealing ring 3, with the help of the rigid structure of the hard rubber support part 4 and the constraint and limiting effect of the groove 6, the sealing ring 3 can be firmly fixed throughout the entire process of pipe insertion, advancement and pipeline operation, effectively preventing the ring from axial displacement, circumferential rotation or radial roll-up and falling off; ensuring that the soft rubber part 5 is always stably located in the sealing area between the inner sealing surface 7 of the pipe socket 1 and the outer wall of the pipe socket 2.

[0031] While the hard rubber support 4 is being installed, the soft rubber part 5 is compressed between the inner sealing surface 7 of the pipe socket 1 and the outer wall of the pipe insertion 2 to form an interface seal.

[0032] like Figure 1 As shown, the hard rubber support part 4 and the soft rubber part 5 are in contact via a bevel 8. The bevel 8 can smoothly disperse the installation pressure and medium bearing stress at the joint between the hard and soft rubber, avoid stress concentration caused by right angle / sharp corner joints, prevent tearing, delamination or damage at the joint between the hard and soft rubber, and ensure the integrity of the rubber ring structure. In addition, the transition of the bevel 8 makes the support force of the hard rubber on the soft rubber uniformly and gradually change, so that the soft rubber part 5 deforms more evenly and fits more tightly when under pressure, which not only optimizes the sealing effect, but also significantly improves the overall strength and long-term durability of the sealing ring 3.

[0033] like Figure 1 and Figure 2 As shown, the soft rubber part 5 includes a first soft rubber part 9 and a first soft rubber part 10. The first soft rubber part 9 contacts the hard rubber support part 4, and both of them have a bevel 8 at the contact points. The first soft rubber part 10 is used to contact the medium inside the pipe and form an auxiliary seal.

[0034] In this embodiment, the hardness of the rigid rubber support 4 is greater than that of the soft rubber part, and the hardness of the first soft rubber part 10 is not less than that of the first soft rubber part 9. The high hardness of the rigid rubber support 4 ensures rigid positioning, preventing displacement and deformation after installation; the low elasticity hardness of the first soft rubber part 9 ensures the deformation capability of the core seal, resulting in a high degree of seal fit; the first soft rubber part 10 can resist media erosion and achieve self-pressurizing sealing, allowing the sealing device to function stably under high temperature, high pressure, and large diameter conditions.

[0035] Correspondingly, the question also arises regarding the type of contact surface used between the first soft rubber portion 9 and the first soft rubber portion 10. In this embodiment, the contact surface between the first soft rubber portion 9 and the first soft rubber portion 10 is a curved surface. For example... Figure 1 and Figure 2 As shown, the side of the first soft rubber part 9 facing the first soft rubber part 10 is an outwardly convex arc surface 11, and the side of the first soft rubber part 10 facing the first soft rubber part 9 is an inwardly concave arc surface 12. The outwardly convex arc surface 11 and the inwardly concave arc surface 12 cooperate to form a curved surface structure of the type between the first soft rubber part 9 and the first soft rubber part 10.

[0036] The curved surface effectively eliminates the sharp edges and stress concentration points at the junction of the first soft rubber part 9 and the first soft rubber part 10. Under long-term operating conditions such as pipeline installation compression, medium pressure impact, and temperature cycling deformation, the curved transition structure can evenly distribute the stress, avoiding fatigue failure problems such as cracks and fractures at the junction. At the same time, the concave-convex arc surface mating method increases the contact area of ​​the two soft rubber parts, resulting in a stronger bond. During installation, it guides the soft rubber parts to compress evenly, and under pressure, it efficiently transmits the medium pressure to the sealing surface, ensuring smooth installation and enhancing the sealing effect. It also makes the deformation coordination of the two soft rubber parts stronger, avoiding local deformation imbalance that could lead to sealing failure.

[0037] When the first soft rubber part 10 is impacted by the medium inside the tube, the first soft rubber part 10 can firmly adhere to the first soft rubber part 9. In other embodiments, the side of the first soft rubber part 9 facing the first soft rubber part 10 can also be a concave arc surface, and the corresponding position of the first soft rubber part 10 is a convex arc surface.

[0038] like Figure 1 and Figure 2 As shown, the side of the first soft rubber part 10 facing the medium inside the tube is defined as the medium contact surface 13, which is a type of structure formed by an inclined surface. When the medium pressure acts on the inclined surface, it will push the type of structure to further tighten the seal, achieving a self-pressurizing effect where the higher the pressure, the tighter the seal. In other embodiments, the medium contact surface 13 may also be a type of structure formed by a corrugated surface.

[0039] The distance between the right vertex of the convex arc surface 11 of the first soft rubber part 9 and the left vertex of the medium contact surface 13 of the first soft rubber part 10 is defined as L. The value of L is greater than 0, so as to ensure that the first soft rubber part 10 has sufficient strength and further ensures the sealing effect.

[0040] like Figure 1As shown, in the entire sealing ring 3, the radial cross-sectional height of the first soft rubber part 9 is defined as H1, the radial cross-sectional height of the first soft rubber part 10 is defined as H2, and the height between the upper and lower contact points of the first soft rubber parts 9 and 10 in the radial direction is defined as H3. The ratio R1 of H1 and H2 satisfies 0.6≤R1≤2.5 and H3≤H1. A reasonable height ratio ensures that the soft rubber part obtains the optimal compression, avoiding both excessive compression leading to a sharp increase in installation resistance and overload aging of the sealing ring, and insufficient compression causing sealing leakage. In other embodiments, the value of R1 can also be finely adjusted according to actual needs, for example, slightly greater than 2.5 or slightly less than 0.6. Furthermore, a sealing gap is formed between the inner sealing surface 7 of the pipe socket 1 and the outer wall of the pipe spigot 2, and the soft rubber part is compressed and filled into the sealing gap. The sealing gap is G, and H1 is greater than the value of G, so that the sealing ring 3 obtains initial sealing force after installation. The sealing ring 3 immediately forms initial sealing force after installation, without relying on the pressure of the medium inside the pipe. The basic seal can be established by assembly compression alone, achieving zero start-up leakage.

[0041] like Figure 1 As shown, in order to convert the pressure of the medium inside the pipe into a positive force for the sealing ring 3 to adhere tightly to the cover, in this embodiment, the upper and lower ends of the radial cross-section of the first soft rubber part 10 are both inclined surfaces 14, arranged at an angle to the horizontal line. This arrangement can further enhance the self-reinforcing sealing effect, while making the deformation of the first soft rubber part 10 more uniform, thus improving structural stability and durability.

[0042] The working principle of the split-type pipe joint sealing device provided by this invention is as follows: When the split-type pipe joint sealing device is working, the hard rubber support part 4 of the sealing ring 3 is first embedded in the groove 6 on the inner wall of the pipe socket 1. The tight fit between the groove 6 and the hard rubber support part 4 completes the positioning of the rubber ring, avoiding displacement or roll-up during installation and operation. Then, the pipe socket 2 is pushed into the pipe socket 1 along the inner side of the sealing ring 3. The inclined surface between the hard rubber support part 4 and the soft rubber part provides a smooth guide for the insertion of the socket, greatly reducing assembly resistance.

[0043] During the process, the soft rubber part undergoes elastic deformation under the combined pressure of the inner sealing surface 7 of the pipe socket 1 and the outer wall of the pipe spigot 2. The first soft rubber part 9 and the first soft rubber part 10 deform together through curved surface connection, uniformly filling the sealing gap and forming a stable initial sealing force. After the medium is introduced into the pipeline, the medium pressure acts directly on the medium contact surface 13 of the first soft rubber part 10, causing the first soft rubber part 10 to further tighten against the sealing surface, forming a self-reinforcing sealing effect. The hard rubber support part 4 continuously provides rigid support. With the reasonable design of parameters such as sealing height and cross-sectional dimensions, the sealing device maintains a stable sealing state under high temperature, high pressure and large diameter conditions, effectively preventing medium leakage.

[0044] An embodiment of the assembly method of the split-type pipe interface sealing device provided by the present invention: An assembly method for a split-type pipe interface sealing device, which utilizes the aforementioned split-type pipe interface sealing device, includes the following steps: S1: Using materials with different hardness, a whole piece of colloid is prepared to form a sealing ring 3. A hard rubber support part 4 is formed at one end of the sealing ring 3, and a first soft rubber part 9 and a first soft rubber part 10 are formed at the other end. The hard rubber support part 4 and the first soft rubber part 9 are in contact through an inclined surface, and the first soft rubber part 9 and the first soft rubber part 10 are in contact through a curved surface. The side of the first soft rubber part 10 facing the medium is an inclined surface or a wavy surface. S2: Machining the shape of each part on the pipe socket 1 that mates with the sealing ring 3, and machining a groove 6 and an inner sealing surface 7 on the inner wall of the pipe socket 1 that match the shape of the hard rubber support part 4. S3: Embed the hard rubber support part 4 of the sealing ring 3 into the groove 6, insert the pipe socket 2 into the pipe socket 1 along the inner circumference of the sealing ring 3, so that the sealing ring 3 is in close contact with the outer wall of the pipe socket 2, and then push the pipe socket 2 in the insertion direction until the pipe socket 2 is firmly sealed and connected with the sealing ring 3 and the pipe socket 1.

[0045] Based on the above description in this specification, those skilled in the art will also understand that the following terms, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0046] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A split-type pipe joint sealing device, comprising a sealing ring for placement at the joint of the pipe socket and the pipe spigot, characterized in that: The sealing ring is a split structure, which includes a hard rubber support part and a soft rubber part with different hardness. The soft rubber part is arranged inward and the hard rubber support part is arranged inward. The hard rubber support is used to be embedded in the groove of the inner wall of the pipe socket, and the soft rubber is compressed between the inner sealing surface of the pipe socket and the outer wall of the pipe insertion to form an interface seal. The contact surface between the hard rubber support and the soft rubber is an inclined surface.

2. The split-type pipe interface sealing device according to claim 1, characterized in that: The soft rubber part includes a first soft rubber part and a second soft rubber part. The first soft rubber part is in contact with the hard rubber support part, and both of them have the inclined surface at the contact points. The second soft rubber part is used to contact the medium inside the pipe and form an auxiliary seal.

3. The split-type pipe interface sealing device according to claim 2, characterized in that: The contact surface between the first soft rubber part and the second soft rubber part is a curved surface.

4. The split-type pipe interface sealing device according to claim 3, characterized in that: The side of the first soft rubber portion facing the second soft rubber portion is a convex arc surface, and the side of the second soft rubber portion facing the first soft rubber portion is a concave arc surface. The convex arc surface and the concave arc surface cooperate to form a curved surface structure of type 1 between the first soft rubber portion and the second soft rubber portion.

5. The split-type pipe interface sealing device according to any one of claims 2 to 4, characterized in that: The side of the second soft rubber part facing the medium inside the tube is defined as the medium contact surface, which is a type of structure formed by a slope or a wave.

6. The split-type pipe interface sealing device according to claim 4, characterized in that: In the sealing ring, the radial section height of the first soft rubber part is defined as H1, the radial section height of the second soft rubber part is defined as H2, and the height between the upper and lower contact points of the first and second soft rubber parts in the radial direction is defined as H3. The ratio R1 of H1 and H2 satisfies 0.6≤R1≤2.5 and H3≤H1.

7. The split-type pipe interface sealing device according to claim 6, characterized in that: A sealing gap is formed between the inner sealing surface of the pipe socket and the outer wall of the pipe inlet, and the soft rubber part is compressed and filled into the sealing gap.

8. The split-type pipe interface sealing device according to claim 7, characterized in that: The sealing gap is defined as G, and H1 is greater than the value of G, so that the sealing ring obtains an initial sealing force after installation.

9. The split-type pipe interface sealing device according to claim 6, characterized in that: The upper and lower surfaces of the second soft rubber part in the radial direction are both inclined surfaces, arranged at an angle to the horizontal line.

10. A method for assembling a split-type pipe interface sealing device, characterized in that, It is achieved by means of the split-type pipe interface sealing device according to any one of claims 1 to 9, and includes the following steps: S1: Using materials with different hardness, a whole piece of colloid is prepared to form a sealing ring. A hard rubber support is formed at one end of the sealing ring, and a first soft rubber part and a second soft rubber part are formed at the other end. The hard rubber support part and the first soft rubber part are in contact through an inclined surface, and the first soft rubber part and the second soft rubber part are in contact through a curved surface. The side of the second soft rubber part facing the medium is an inclined surface or a wavy surface. S2: Machining the shape of each part on the pipe socket that mates with the sealing ring, and machining a groove and inner sealing surface on the inner wall of the pipe socket that match the shape of the hard rubber support; S3: Embed the hard rubber support part of the sealing ring into the groove, insert the pipe socket into the pipe socket along the inner circumference of the sealing ring, so that the sealing ring is in close contact with the outer wall of the pipe socket, and then push the pipe socket in the insertion direction until the pipe socket is firmly sealed and connected with the sealing ring and the pipe socket.

Images