A pipeline sealing ring

Abstract

The present invention provides a pipeline sealing ring, belonging to the technical field of drainage pipelines. It solves the technical problem that the existing pipeline sealing rings are difficult to balance the installation position stability and service life. This pipeline sealing ring includes a rigid sealing part and a soft sealing part that are integrally connected. The rigid sealing part and the soft sealing part are both annular and concentrically arranged. The rigid sealing part includes a transition section and a skeleton section that are both annular and concentrically arranged. There is an annular groove arranged circumferentially between the transition section and the outer skeleton section along the radial direction. The inner edge of the transition section has a circumferentially arranged retaining edge. The soft sealing part includes a fitting section in a trumpet shape. The large end of the fitting section faces the same direction as the opening of the groove. The transition section is sleeved and fixedly connected to the outer periphery of the large end of the fitting section. The retaining edge is adhesively fixed to the large end face of the fitting section and covers the large end face of the fitting section. This pipeline sealing ring ensures the installation stability of the sealing ring while effectively improving the service life.

Description

Technical Field

[0001] The invention belongs to the technical field of drainage pipes and relates to a pipe sealing ring. Background Art

[0002] Some drainage pipes are connected by inserting pipe fittings into pipe heads, and an annular sealing groove is provided on the inner wall of the pipe head. A sealing ring is embedded in the sealing groove, so that the sealing ring forms a seal with the outer periphery of the inserted pipe fitting, thereby ensuring the sealing performance. However, during the actual installation and connection, especially during the insertion of larger pipe fittings, the soft sealing ring may rotate due to friction resistance, and may even fall out of the sealing groove and affect the connection. Therefore, in the field, a skeleton with higher hardness and more stable shape is often provided in the sealing ring to keep the installation position of the pipe sealing ring stable.

[0003] For example, the patent with authorization announcement number CN207213161U discloses a dustproof sealing ring for a hydraulic cylinder piston rod, which includes an outer dustproof lip and an inner dustproof lip, which are connected in an I-shape. Polyurethane materials with different hardness are used to make the inner and outer dustproof lips of the dustproof sealing ring, so that the sealing ring has excellent wear resistance and anti-extrusion properties.

[0004] The above sealing ring can avoid flipping out of the sealing groove, but there are still some shortcomings: the position of the sealing ring is stable, and when the soft inner dust lip is subjected to large friction during installation, it is easier to cause it to separate from the outer dust lip of different materials, affecting the service life of the sealing ring. In this regard, technicians in the field generally consider: 1. Further increase the bonding area between the parts of different materials; 2. Improve the affinity between the two bonding materials to make the connection tighter; 3. Set a limit bite structure between the parts of different materials to improve the stability of the connection. Summary of the invention

[0005] The present invention aims at the above-mentioned problems existing in the prior art and provides a pipeline sealing ring. The technical problem to be solved by the present invention is that it is difficult for the prior sealing ring to have both installation position stability and service life.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A pipeline sealing ring, comprising a rigid sealing part and a soft sealing part integrally connected. The rigid sealing part and the soft sealing part are both annular and concentrically arranged. It is characterized in that the rigid sealing part includes a transition section and a skeleton section that are both annular and concentrically arranged. There is an annular groove arranged circumferentially between the transition section and the peripheral skeleton section along the radial direction. The inner edge of the transition section has a circumferentially arranged retaining edge. The soft sealing part includes a flaring fitting section. The large end of the fitting section faces in the same direction as the opening of the groove. The transition section is sleeved and fixedly connected to the outer periphery of the large end of the fitting section. The retaining edge is adhesively and fixedly connected to the large end face of the fitting section and covers the large end face of the fitting section.

[0008] The rigid sealing part can improve the overall stiffness of the sealing ring and prevent the entire sealing ring installed in the sealing groove from being flipped out during the insertion and extraction of the pipe fitting. The soft sealing part has excellent deformation ability and is the main force for exerting the sealing effect. By setting the rigid sealing part to include a transition section and a skeleton section that are concentrically arranged and spaced by a groove from the inside to the outside along the radial direction, a retaining edge is provided at the inner edge of the transition section, and the soft sealing part is set to include a flaring fitting section, so that the axial orientation of the large end of the fitting section is the same as the opening direction of the groove, the transition section is sleeved and connected to the outer peripheral surface of the large end of the fitting section, and the retaining edge covers the large end face of the fitting section. In this way, when the pipe fitting is inserted into the fitting section from the large end, its inner edge can tightly sleeve on the outer peripheral surface of the pipe fitting through deformation to form a seal. During the insertion process, if the frictional force on the fitting section is too large, the fitting section will generate a pulling force on a part of the transition section. At this time, due to the existence of the groove, the rigid transition section can adaptively deform and shift relative to the skeleton section under the action of the pulling force, thereby avoiding cracking and separation between the fitting section and the transition section at this place. At the same time, the retaining edge can form a wrapped connection to the large end of the fitting section, improve the connection strength, and prevent the pipe fitting from directly acting on the joint position of the fitting section and the transition section during axial insertion, resulting in cracking. Therefore, while ensuring the installation stability of the sealing ring, the service life is improved.

[0009] In the above pipeline sealing ring, the inner edge of the retaining edge has a turned-up edge that turns towards the small end of the fitting section. The turned-up edge is annular and is adhesively and fixedly connected to the inner edge of the large end of the fitting section along the circumferential direction. In this way, the extension direction of the joint surface between the large end of the fitting section and the turned-up edge can better match the direction of the pulling force at this place, that is, it is beneficial for the entire joint surface with the turned-up edge to participate in force sharing over a larger area when the fitting section is subjected to a pulling force, avoiding excessive local stress at the joint between the fitting section and the turned-up edge and resulting in cracking, and further extending the service life of the sealing ring.

[0010] In the above pipeline sealing ring, the side cross-section of the turned edge facing the small end of the fitting section is in a sharp angle shape, and the inner edge surface of the turned edge is smoothly transitioned with the inner edge surface of the fitting section. In this way, the stiffness of the turned edge gradually decreases from the large end to the small end of the fitting section, which is beneficial to weakening the deformation difference caused by different materials between the fitting section and the turned edge, realizing a flexible transition at the joint, and reducing the probability of cracking at the inner edge joint of the fitting section.

[0011] In the above pipeline sealing ring, the thickness dimension of the skeleton section in the radial direction is greater than the thickness dimension of the transition section in the radial direction. In this way, under the condition of enabling the transition section to be adaptively deflected and avoid cracking, it is beneficial to ensure that the skeleton section provides sufficient stiffness for the entire sealing ring and ensure the installation stability of the sealing ring.

[0012] In the above pipeline sealing ring, the soft sealing part further includes a base section integrally connected to the outer peripheral surface of the fitting section. The transition section and the skeleton section are integrally connected through an engaging section arranged circumferentially, and part or the whole of the engaging section is embedded in the base section. In this way, the base section can be used as the main body of the soft sealing part to be connected with the engaging section and form the main part of the sealing ring to maintain stable engagement, so that the connection between the soft sealing part and the hard sealing part is stable.

[0013] In the above pipeline sealing ring, the outer diameter dimension of the base section is greater than the outer diameter dimension of the skeleton section. In this way, it is beneficial to ensure that the outer edge seal of the sealing ring is formed by the soft base section, thereby ensuring a stable sealing effect between the sealing ring and the inner wall of the sealing groove.

[0014] In the above pipeline sealing ring, both the inner edge and the outer edge of the engaging section are provided with circumferentially arranged annular grooves. In this way, it is beneficial to increase the joint area between the engaging section and the base section, improve the connection strength, and at the same time enable both radial sides of the engaging section to form engaging positioning with the base section to ensure connection stability.

[0015] In the above pipeline sealing ring, the base section has a protruding lip on the side axially away from the skeleton section along the fitting section. The lip is annular and arranged around the periphery of the fitting section. In this way, the lip can abut against the inner wall of the sealing groove to provide further sealing. At the same time, when the pipe fitting is inserted, the lip can be deformed and compressed by the force, so that the transition section will not contact the inner wall of the sealing groove and can be deformed normally, ensuring the service life of the sealing ring.

[0016] In the above pipeline sealing ring, the small end of the fitting section is opposite to the lip in the radial direction. In this way, when the pipe fitting is inserted and connected, the small end of the fitting section can deform outward and abut against the lip to form a multi-layer seal, improving the sealing effect.

[0017] In the above pipeline sealing ring, the soft sealing part is a rubber part or a TPE material part, and the hard sealing part is a PP material part. In this way, while maintaining good elasticity, the soft sealing part can have better affinity with the hard sealing part to ensure the connection strength.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] This pipeline sealing ring can better avoid cracking and separation at the joint of parts made of different hardness materials during the installation of pipe fittings, ensuring the installation stability of the sealing ring and effectively improving the service life. Description of the Drawings

[0020] Figure 1 is a schematic cross-sectional structure diagram of this embodiment.

[0021] Figure 2 is Figure 1 an enlarged view of part A in

[0022] In the figure, 1, hard sealing part; 11, transition section; 111, retaining edge; 112, turned edge; 12, skeleton section; 13, groove; 14, engaging section; 141, annular groove;

[0023] 2, soft sealing part; 21, fitting section; 22, base section; 23, lip. Detailed Embodiment

[0024] The following are specific embodiments of the present invention in combination with the drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0025] Such as Figure 1 、 Figure 2As shown in the figure, the pipeline sealing ring of the present invention includes a rigid sealing portion 1 and a soft sealing portion 2 which are integrally injection-molded and connected or vulcanized and formed. The soft sealing portion 2 is a TPE material part, and the rigid sealing portion 1 is a PP material part. Both the rigid sealing portion 1 and the soft sealing portion 2 are annular and concentrically arranged. The rigid sealing portion 1 includes a transition section 11 and a skeleton section 12 which are both annular and concentrically arranged. There is an annular groove 13 arranged circumferentially between the transition section 11 and the outer skeleton section 12 along the radial direction. The inner edge of the transition section 11 has a circumferentially arranged retaining edge 111. The soft sealing portion 2 includes a flaring fitting section 21. The large end of the fitting section 21 faces the same direction as the opening of the groove 13. The transition section 11 is sleeved and fixedly connected to the outer periphery of the large end of the fitting section 21. The retaining edge 111 is adhesively fixed to the large end face of the fitting section 21 and covers the large end face of the fitting section 21. Specifically, the inner edge of the retaining edge 111 has a folded edge 112 that folds towards the small end of the fitting section 21. The folded edge 112 is annular and is adhesively fixed to the inner edge of the large end of the fitting section 21 along the circumferential direction. The cross-section of the side of the folded edge 112 facing the small end of the fitting section 21 is pointed, and the inner edge surface of the folded edge 112 is smoothly transitioned with the inner edge surface of the fitting section 21. The radial thickness dimension of the skeleton section 12 is greater than the radial thickness dimension of the transition section 11, and the dimension of the skeleton section 12 along the axial direction of the fitting section 21 is greater than the corresponding dimension of the transition section 11. In this way, when the pipe fitting is inserted, there is a drop from the skeleton section 12 to the transition section 11, which is convenient for the pipe fitting to be accurately inserted for installation.

[0026] As Figure 2 shown in the figure, the soft sealing portion 2 further includes a base section 22 integrally connected to the outer peripheral surface of the fitting section 21. The transition section 11 and the skeleton section 12 are integrally connected by a circumferentially arranged engaging section 14. The engaging section 14 is partially or wholly embedded in the base section 22. The outer diameter dimension of the base section 22 is greater than the outer diameter dimension of the skeleton section 12. Both the inner edge and the outer edge of the engaging section 14 have circumferentially arranged annular grooves 141. On the side of the base section 22 along the axial direction of the fitting section 21 away from the skeleton section 12, there are two radially spaced lips 23. The two lips 23 are annular and are both arranged around the periphery of the fitting section 21. The small end of the fitting section 21 is opposite to the lips 23 along the radial direction.

[0027] The specific embodiments described herein are only illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A pipeline sealing ring, comprising a hard sealing part (1) and a soft sealing part (2) connected in one piece, wherein the hard sealing part (1) and the soft sealing part (2) are both annular and concentrically arranged, and characterized in that: The hard sealing portion (1) comprises a transition section (11) and a skeleton section (12) both of which are annular and arranged concentrically. The transition section (11) has a circumferentially arranged annular groove (13) between the transition section (11) and the skeleton section (12) in the radial direction. The inner edge of the transition section (11) has a circumferentially arranged retaining edge (111). The retaining edge (111) is located at the edge of the groove (13). The soft sealing portion (2) comprises a trumpet-shaped fitting section (21). The large end of the fitting section (21) faces in the same direction as the open end of the groove (13). The transition section (11) is sleeved and fixedly connected to the large end outer periphery of the fitting section (21). The retaining edge (111) is fitted and fixedly connected to the large end surface of the fitting section (21) and covers the large end surface of the fitting section (21).

2. The pipeline sealing ring according to claim 1, characterized in that: The inner edge of the retaining edge (111) comprises a flange (112) folded towards the small end of the fitting section (21); the flange (112) is annular and is fitted and fixedly connected to the inner edge of the large end of the fitting section (21) along the circumferential direction.

3. The pipeline sealing ring according to claim 2, characterized in that: The cross section of the side of the flange (112) facing the small end of the fitting section (21) is in a pointed shape, and the inner edge surface of the flange (112) smoothly transitions to the inner edge surface of the fitting section (21).

4. The pipeline sealing ring according to claim 1, 2 or 3, characterized in that: The thickness dimension of the skeleton segment (12) along the radial direction is greater than the thickness dimension of the transition segment (11) along the radial direction.

5. The pipeline sealing ring according to claim 1, 2 or 3, characterized in that: The soft sealing portion (2) further comprises a base segment (22) integrally connected to the outer peripheral surface of the fitting segment (21); the transition segment (11) and the skeleton segment (12) are integrally connected via a bite segment (14) arranged around the circumference; the bite segment (14) is partially or entirely embedded in the base segment (22).

6. The pipeline sealing ring according to claim 5, characterized in that: The outer diameter of the base segment (22) is greater than the outer diameter of the skeleton segment (12).

7. The pipeline sealing ring according to claim 5, characterized in that: The inner edge and the outer edge of the engaging section (14) both have an annular groove (141) arranged in the circumferential direction.

8. The pipeline sealing ring according to claim 5, characterized in that: The base segment (22) has a protruding lip edge (23) along a side of the fitting segment (21) axially away from the skeleton segment (12); the lip edge (23) is annular and arranged around the periphery of the fitting segment (21).

9. The pipeline sealing ring according to claim 8, characterized in that: The small end of the fitting section (21) is radially opposite to the lip edge (23).

10. The pipeline sealing ring according to claim 1, 2 or 3, characterized in that: The soft sealing part (2) is a rubber part or a TPE material part, and the hard sealing part (1) is a PP material part.

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