Water pipe sealing rubber ring with dovetail
By designing the dovetail sealing rubber ring, using the combined structure of the pressure bearing ring and the rubber ring, the problem of sealing failure of the O-ring under high pressure is solved, and efficient sealing and zero leakage of the water supply pipe system is achieved.
Patent Information
- Application Number
- CN202521417771.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-08
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2035-07-08
AI Technical Summary
In existing water supply pipe systems, the O-type sealing ring is easily squeezed into the pipeline gap under high pressure, resulting in seal failure, and cannot effectively fill the microscopic gap, resulting in fluid media leakage.
A sealing rubber ring with dovetails is adopted, including a pressure-bearing ring and a rubber ring. The rubber ring section is bimodal, and there is a dovetail groove extending inwardly at the outer end of the dovetail. Through the hard constraint of the pressure-bearing ring and the layered compression mode of the rubber ring, the contact area is increased and the contact pressure is dynamically adjusted to form a continuous and uniform stress distribution.
Maintain sealing effect under high pressure, effectively fill the microscopic gap, and achieve zero leakage fluid transmission.
Smart Images
Figure CN223215750U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water pipe connection and sealing, in particular to a water pipe sealing rubber ring with a dovetail. Background Art
[0002] In the cast iron pipe connection process of water pipe systems, sealing rings play an irreplaceable role as key sealing components. Through the compression and deformation characteristics of elastic materials, they create continuous and uniform contact pressure on the pipe interface end faces, effectively filling microscopic gaps caused by machining precision errors or thermal expansion, achieving zero-leakage transmission of fluid media.
[0003] The O-ring, a commonly used sealing ring in existing technology, has a standardized circular cross-section and is installed in a pipe sealing groove. It relies on compression and rebound force to achieve a seal and is resistant to chemical corrosion and high temperatures. However, when used in water mains, due to the high pressure in the water pipe, the O-ring is easily squeezed into the pipe gap under high pressure, resulting in seal failure. Utility Model Content
[0004] The purpose of the utility model is to provide a water pipe sealing rubber ring with a dovetail to solve the problems mentioned in the above background technology.
[0005] In order to solve the above technical problems, the utility model provides a water pipe sealing rubber ring with a dovetail, which is installed in a pipe sealing groove. It includes a pressure ring and a rubber ring. The rubber ring includes a ball portion and a dovetail portion. The cross-section of the rubber ring is a double-peak shape. The outer end of the ball portion is connected to the inner end of the pressure ring, and the outer end of the dovetail portion is provided with a dovetail groove extending inward.
[0006] Furthermore, the inner diameter of the pressure ring gradually increases from the inner end of the pressure ring to the outer end of the pressure ring.
[0007] Furthermore, the outer end surface of the ball portion is an inclined surface that is inclined upward along the outer side of the ball portion toward the inner side of the ball portion, and the inner end surface of the pressure ring is adapted to the outer end surface of the ball portion.
[0008] Furthermore, the angle between the inclined surface and the horizontal direction is 20°.
[0009] Furthermore, an outer side of the middle portion of the dovetail portion and an outer side of the inner end of the pressure ring are both provided with mounting grooves, and the mounting grooves are adapted to the limiting rings on the inner wall of the sealing groove.
[0010] Furthermore, the angle between the inner side surface of the pressure ring and the horizontal direction is 65°.
[0011] Furthermore, the inner side surface of the dovetail portion is flush with the inner side surface of the ball portion.
[0012] The beneficial effects of the present invention are as follows: the present invention enables the rubber ring to remain in place under high pressure through the rigid constraint of the pressure ring; the layered compression mode of the rubber ring not only increases the effective contact area, but also dynamically adjusts the contact pressure through elastic deformation under high pressure, forming a more continuous and uniform stress distribution, thereby effectively filling the microscopic gaps. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic cross-sectional view of an embodiment of the utility model installed in a cast iron pipe.
[0014] Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of the present utility model.
[0015] Among them: 1. Sealing groove; 2. Pressure ring; 3. Rubber ring; 4. Installation groove; 5. Limiting ring; 6. First cast iron pipe; 7. Second cast iron pipe.
[0016] 31. Ball part; 32. Dovetail part; 33. Dovetail groove. DETAILED DESCRIPTION
[0017] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiment described is only one embodiment of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0018] In order to make the objectives, technical solutions and advantages of this application clearer, this application is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0019] In the following description, references to "one embodiment," "an embodiment," "an example," "an example," etc. indicate that the embodiment or example described may include certain features, structures, characteristics, properties, elements, or limitations, but not every embodiment or example necessarily includes the certain features, structures, characteristics, properties, elements, or limitations. In addition, repeated use of the phrase "according to one embodiment of the present application" may refer to the same embodiment, but does not necessarily refer to the same embodiment.
[0020] like Figure 1-Figure 2As shown, the present invention discloses a water pipe sealing rubber ring with a dovetail, which is installed in a pipe sealing groove 1. Specifically, when a first cast iron pipe 6 is connected to a second cast iron pipe 7, the second cast iron pipe 7 is inserted into the first cast iron pipe 6. The outer ring of the rubber ring 3 contacts the inner wall of the first cast iron pipe 6, and the inner ring of the rubber ring 3 contacts the inner wall of the second cast iron pipe 7, thereby sealing the connection between the first and second cast iron pipes 6, 7. The rubber ring 3 comprises a pressure ring 2 and a rubber ring 3. The rubber ring 3 includes a ball portion 31 and a dovetail portion 32. The cross-section of the rubber ring 3 is bimodal. The outer end of the ball portion 31 connects to the inner end of the pressure ring 2, and the outer end of the dovetail portion 32 defines an inwardly extending dovetail groove 33. In this embodiment, the dovetail groove 33 is V-shaped. Specifically, the dovetail portion 32 includes a first contact member and a second contact member. The first contact member contacts the first cast iron pipe 6, and the second contact member contacts the second cast iron pipe 7, forming a seal.
[0021] At the same time, when water flows between the first cast iron pipe 6 and the second cast iron pipe 7, the pressure of the water impacts the dovetail groove 33, pushing the dovetail portion 32 outward and squeezing the ball portion 31. This increases the contact area between the inclined surface of the dovetail groove 33 and the sidewall of the sealing groove 1. This increases the contact surface between the rubber ring 3 and the sealing groove 1, improving local anti-permeability and achieving layered compression. The pressure ring 2 is made of a hard material (such as a hard rubber ring) and serves as a support to limit the axial displacement of the ball portion 31 of the rubber ring 3 under high pressure, preventing it from being squeezed into the pipe gap.
[0022] The ball portion 31 is primarily responsible for initial compression and rebound, rapidly filling the space within the sealing groove 1; the dovetail portion 32, through its extended portion, further adheres to the sidewalls of the sealing groove 1. This layered compression pattern not only increases the effective contact area but also dynamically adjusts the contact pressure through elastic deformation under high pressure, creating a more continuous and uniform stress distribution, effectively filling microscopic gaps. Specifically, when the medium pressure increases, the dovetail portion 32 is further pressed against the inner wall of the pipe due to the fluid pressure, that is, the first and second contact members respectively adhere to the inner walls of the first and second cast iron pipes 6 and 7, achieving a pressure-enhanced seal.
[0023] The utility model enables the rubber ring 3 to remain in place under high pressure through the rigid constraint of the pressure ring 2. The layered compression mode of the rubber ring 3 not only increases the effective contact area, but also dynamically adjusts the contact pressure through elastic deformation under high pressure, forming a more continuous and uniform stress distribution, thereby effectively filling the microscopic gaps.
[0024] In one embodiment, the inner diameter of the pressure ring 2 gradually increases from its inner end toward its outer end. Specifically, the inner diameter of the pressure ring 2 adopts a gradually expanding tapered structure (smaller at the inner end and larger at the outer end). When high-pressure fluid acts on the rubber ring 3, the tapered expansion of the inner diameter of the pressure ring 2 forms a mechanical barrier, limiting the outward displacement of the rubber ring 3 (particularly the ball portion 31), preventing it from being squeezed into the pipe assembly gap by the high pressure, while also facilitating the installation of the water pipe.
[0025] In one embodiment, the outer end surface of the ball 31 is inclined, sloping upward from the outside toward the inside. The inner end surface of the pressure ring 2 aligns with the outer end surface of the ball 31. The outer end surface of the ball 31 features an inclined surface that slopes upward from the outside toward the inside (e.g., at an angle of 15°-30° relative to the horizontal), while the inner end surface of the pressure ring 2 forms a complementary inclined surface, forming a wedge-shaped coupling interface. Under axial installation pressure, the inclined surface converts some of the axial force into radial expansion force, enhancing the initial contact pressure between the ball 31 and the bottom of the sealing groove 1 and further limiting radial displacement of the rubber ring 3.
[0026] In one embodiment, the angle between the inclined surface and the horizontal direction is 20°, achieving an optimal balance between installation force and sealing performance.
[0027] In one embodiment, mounting grooves 4 are defined on the outer side of the middle portion of dovetail portion 32 and the outer side of the inner end of pressure ring 2. These grooves 4 mate with retaining rings 5 on the inner wall of sealing groove 1, facilitating stable installation of the sealing ring within sealing groove 1 and further preventing axial movement. Furthermore, when water pressure pushes dovetail groove 33, causing dovetail portion 32 to expand outward, retaining rings 5 constrain dovetail portion 32, further enhancing sealing performance.
[0028] In one embodiment, the angle between the inner side surface of the pressure ring 2 and the horizontal direction is 65°.
[0029] In one embodiment, the inner surface of the dovetail portion 32 is flush with the inner surface of the ball portion 31, maintaining uniformity of the sealing surface under pressure, avoiding local stress concentration, and ensuring that the two sealing surfaces work together during deformation without gaps or misalignment. This ensures both sealing reliability during initial installation and dynamic compensation capabilities for long-term service.
[0030] The design ideas of this utility model are as follows:
[0031] The sealing ring consists of a pressure ring 2 and a rubber ring 3. The pressure ring 2 is made of a rigid material. The inner diameter of the pressure ring 2 gradually increases from its inner end to its outer end, forming a tapered structure (smaller at the inner end and larger at the outer end), with an angle of 65° with the horizontal. The rubber ring 3 includes a spherical portion 31 and a dovetail portion 32. The cross-section of the rubber ring 3 is bimodal, with an inwardly extending dovetail groove 33 defined at the outer end of the dovetail portion 32. The outer end surface of the spherical portion 31 is inclined upward from the outer end to the inner end, with an angle of 20° with the horizontal. The angle between the dovetail portion 32 and the inner side is 30° with the horizontal.
[0032] The rubber ring 3 of the sealing ring is installed inwardly into the sealing groove 1 inside the first cast iron pipe 6, so that the installation groove 4 is adapted to the limiting ring 5 in the sealing groove 1. Then the second cast iron pipe 7 is inserted into the first cast iron pipe 6, and the pressure ring 2 and the rubber ring 3 are passed through in sequence.
[0033] The utility model enables the rubber ring 3 to remain in place under high pressure through the rigid constraint of the pressure ring 2. The layered compression mode of the rubber ring 3 not only increases the effective contact area, but also dynamically adjusts the contact pressure through elastic deformation under high pressure, forming a more continuous and uniform stress distribution, thereby effectively filling the microscopic gaps.
[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A water pipe sealing rubber ring with a dovetail, installed in a pipe sealing groove, characterized by: It includes a pressure ring and a rubber ring. The rubber ring includes a ball part and a dovetail part. The cross section of the rubber ring is in a double-peak shape. The outer end of the ball part is connected to the inner end of the pressure ring. The outer end of the dovetail part is provided with a dovetail groove extending inward.
2. The water pipe sealing rubber ring with a dovetail according to claim 1, characterized in that: The inner diameter of the pressure ring gradually increases from the inner end of the pressure ring to the outer end of the pressure ring.
3. The water pipe sealing rubber ring with a dovetail according to claim 1, characterized in that: The outer end surface of the ball portion is an inclined surface that is inclined upward along the outer side of the ball portion toward the inner side of the ball portion, and the inner end surface of the pressure ring is adapted to the outer end surface of the ball portion.
4. The water pipe sealing rubber ring with a dovetail according to claim 3, characterized in that: The angle between the inclined surface and the horizontal direction is 20°.
5. The water pipe sealing rubber ring with a dovetail according to claim 1, characterized in that: The outer side of the middle part of the dovetail portion and the outer side of the inner end of the pressure ring are both provided with mounting grooves, and the mounting grooves are adapted to the limiting rings on the inner wall of the sealing groove.
6. The water pipe sealing rubber ring with a dovetail according to claim 2, characterized in that: The angle between the inner side surface of the pressure ring and the horizontal direction is 65°.
7. The water pipe sealing rubber ring with a dovetail according to claim 1, characterized in that: The inner side surface of the dovetail portion is flush with the inner side surface of the ball portion.