Farmland PVC pipeline bell and spigot sealing ring

Abstract

The utility model relates to the technical field of pipeline sealing rings, in particular to a farmland PVC pipeline bell and spigot sealing ring which comprises an annular sealing ring body, the inner side of the sealing ring body comprises a first sealing face and a second sealing face which are sequentially connected from top to bottom, and the first sealing face and the second sealing face are both conical. The sealing ring is reasonable and compact in structure, the second sealing face is arranged, the inner side sleeve can make sealing contact when the inner side of the upper portion of the sealing ring body is sleeved with the inner side sleeve, the sealing effect between an inner side pipeline and the sealing ring body is guaranteed, the sealing protrusions are arranged, the inner surface of the sealing ring body and the outer wall of the inner side pipeline make line contact, and the sealing effect is better compared with surface contact. In this way, the sealing performance between the sealing ring body and the outer wall of the inner side pipeline can be guaranteed, the friction force generated when the sealing ring body is installed on the outer wall of the inner side pipeline can be reduced, the disassembly and assembly difficulty is lowered, and the at least two sealing protrusions can avoid the leakage phenomenon caused by unevenness of the outer wall of the pipeline due to surface machining tolerance.

Description

Technical Field

[0001] This utility model relates to the field of pipe sealing ring technology, and is a sealing ring for the socket of PVC pipes in farmland. Background Technology

[0002] Agricultural irrigation pipelines generally use PVC pipes, a common pipe material made of polyvinyl chloride. Among PVC pipe connection technologies, the socket connection method, with its unique flexibility, gives the connected pipeline resistance to vibration, shrinkage, and expansion. Compared to flange and clamp connections, socket connections increase the stability of the pipeline structure system, making it more suitable for changes in ambient temperature and thus reducing stress damage to structural components. In recent years, socket connection technology has been widely used in China for PVC pipe connections, mainly in water supply and drainage systems or a small portion of rigid pipelines.

[0003] Currently, the connection between two PVC pipes for farmland irrigation is generally achieved using a socket joint. One end of one PVC pipe is inserted into the flared end of another PVC pipe, and then a sealing ring or filler is installed inside the flared end. The sealing ring or filler is then placed between the two PVC pipes in the annular space, and the PVC pipes are finally connected together. This socket joint method for farmland irrigation PVC pipes has the following drawbacks: the annular gap between the inner and outer pipes in the socket joint is small, resulting in high frictional resistance; the sealing ring is not well-fitted to the inner wall of the pipe, causing the sealing ring to be easily damaged during insertion, thus compromising the sealing effect and affecting the quality of the project. Summary of the Invention

[0004] This utility model provides a sealing ring for the socket joint of PVC pipes in farmland, which overcomes the shortcomings of the prior art. It can effectively solve the problem that the sealing ring is easily damaged when the inner and outer pipes of the existing socket connection are inserted, and the sealing effect cannot be guaranteed.

[0005] The technical solution of this utility model is achieved through the following measures: a sealing ring for a PVC pipe socket in farmland, comprising an annular sealing ring body, the inner side of the sealing ring body including a first sealing surface and a second sealing surface connected sequentially from top to bottom, both the first sealing surface and the second sealing surface being conical, the first sealing surface having at least two sealing protrusions spaced apart from top to bottom, a sealing lip fixed on the outer side of the middle part of the sealing ring body, and an annular groove with an upward opening formed between the inner side of the sealing lip and the outer side of the sealing ring body.

[0006] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0007] The thickness of the sealing ring body below the sealing lip can gradually decrease from top to bottom. At least one annular sealing groove with an outward opening is provided at intervals on the lower outer side of the sealing ring body. The cross-section of the sealing groove is V-shaped.

[0008] The upper end of the sealing lip can be located below the upper end of the sealing ring body. The upper end of the sealing lip is provided with a rounded chamfer, and the outer side of the lower end of the sealing lip and the outer side of the lower part of the sealing ring body are connected by a rounded transition.

[0009] The first sealing surface can be a cone shape with a smaller top and a larger bottom, and the first sealing surface is provided with 2 to 4 sealing protrusions spaced from top to bottom. The second sealing surface is a cone shape with a larger top and a smaller bottom.

[0010] The aforementioned sealing protrusion can be in the shape of an outward-facing arc.

[0011] The aforementioned annular groove can be trapezoidal, wider at the top and narrower at the bottom.

[0012] This utility model has a reasonable and compact structure. In use, the sealing ring of the PVC pipe socket is put into the outer pipe with the flared end, and then the inner pipe with the conical end is inserted into the outer pipe. This makes the sealing ring of the PVC pipe socket tightly sealed between the flared end of the outer pipe and the inner pipe, so that the two pipes can achieve a flexible connection of the socket sealing ring.

[0013] The first sealing surface guides the inner pipe when it is fitted inside the sealing ring. The second sealing surface ensures a tight seal when the inner pipe is fitted inside the upper part of the sealing ring, guaranteeing a seal between the inner pipe and the sealing ring. The sealing protrusions ensure line contact between the inner surface of the sealing ring and the outer wall of the inner pipe, rather than surface contact. This not only ensures a seal between the sealing ring and the outer wall of the inner pipe but also reduces friction when the sealing ring is installed on the outer wall, making disassembly and assembly easier. At least two sealing protrusions prevent leakage caused by unevenness in the outer wall of the pipe due to surface machining tolerances. The sealing lip matches the flared end of the outer pipe, ensuring a tight seal between the sealing lip and the inner wall of the outer pipe, thus achieving a seal at the socket connection between the two pipes. Attached Figure Description

[0014] Appendix Figure 1 These are schematic diagrams of the main cross-sectional structure of embodiments one to six of this utility model.

[0015] Appendix Figure 2 These are three-dimensional structural diagrams of embodiments one to six of this utility model.

[0016] Appendix Figure 3 These are schematic diagrams of the front cross-sectional structure of embodiments one to six of this utility model during use.

[0017] The codes in the attached diagram are as follows: 1 is the sealing ring body, 2 is the first sealing surface, 3 is the second sealing surface, 4 is the sealing protrusion, 5 is the sealing lip, 6 is the annular groove, 7 is the sealing groove, 8 is the rounded chamfer, 9 is the inner pipe, 10 is the outer pipe, and 11 is the flared end. Detailed Implementation

[0018] This invention is not limited to the following embodiments; the specific implementation method can be determined according to the technical solution of this invention and the actual situation.

[0019] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0020] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0021] Example 1: As shown in the attached document Figure 1 , 2 As shown in Figure 3, the sealing ring for the PVC pipe socket of the farmland includes an annular sealing ring body 1. The inner side of the sealing ring body 1 includes a first sealing surface 2 and a second sealing surface 3 connected sequentially from top to bottom. Both the first sealing surface 2 and the second sealing surface 3 are conical. The first sealing surface 2 is provided with at least two sealing protrusions 4 spaced apart from top to bottom. A sealing lip 4 is fixed on the outer side of the middle part of the sealing ring body 1. An annular groove 6 with an upward opening is formed between the inner side of the sealing lip 4 and the outer side of the sealing ring body 1.

[0022] As required, the sealing ring body 1 is made of existing known rubber material, which is convenient for disassembly and assembly, and can ensure a sealing contact with the pipeline when the temperature changes.

[0023] In use, the PVC pipe socket sealing ring is placed inside the outer pipe 10 with the flared end 11, and then the inner pipe 9 with the conical end is inserted into the outer pipe 10, so that the PVC pipe socket sealing ring is tightly sealed between the flared end 11 of the outer pipe 10 and the inner pipe 9, so that the two pipes are flexibly connected by the socket sealing ring.

[0024] The first sealing surface 2 serves as a guide when the inner pipe 9 is fitted inside the sealing ring body 1. The second sealing surface 3 ensures a sealing contact when the inner pipe 9 is fitted inside the upper part of the sealing ring body 1, guaranteeing the sealing effect between the inner pipe 9 and the sealing ring body 1. The sealing protrusion 4 ensures line contact between the inner surface of the sealing ring body 1 and the outer wall (conical surface) of the inner pipe 9, rather than surface contact. This ensures the sealing performance between the sealing ring body 1 and the outer wall of the inner pipe 9, while also reducing the friction of the sealing ring body 1 on the outer wall of the inner pipe 9, thus reducing the difficulty of disassembly and assembly. At least two sealing protrusions 4 can prevent leakage caused by unevenness of the outer wall of the pipe due to surface processing tolerances. The sealing lip 4 can match the flared end 11 of the outer pipe 10, ensuring a sealing contact between the sealing lip 4 and the inner wall of the outer pipe 10, thereby achieving a sealing effect at the socket connection of the two pipes.

[0025] The sealing rings of the sockets of the PVC pipes in the farmland can be further optimized and / or improved according to actual needs:

[0026] Example 2: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figures 3 and 4, the thickness of the sealing ring body 1 below the sealing lip 4 gradually decreases from top to bottom. At least one annular sealing groove 7 with an outward opening is provided at intervals on the lower outer side of the sealing ring body 1. The cross-section of the sealing groove 7 is V-shaped.

[0027] According to the requirements, two outward-facing annular sealing grooves 7 are provided at intervals on the lower outer side of the sealing ring body 1. The sealing grooves 7 are arranged along the circumference of the sealing ring body 1, and the cross-section of the sealing grooves 7 is V-shaped at 90 degrees. The two side walls of the sealing grooves 7 are perpendicular to each other, one side of the sealing grooves 7 is vertically downward, and the other side of the sealing grooves 7 is arranged along the radial direction of the sealing ring body 1. During use, the lower outer side of the sealing ring body 1 is sealed and fitted with the inner wall of the flared opening 11 of the outer pipe 10. A closed cavity is formed between the inner wall of the sealing grooves 7 and the inner wall of the outer pipe 10. Under the action of water pressure, the pressure outside the cavity is greater than the pressure inside the cavity. This makes the sealing ring body 1 adhere tightly to the inner wall of the outer pipe 10, improving the adhesion of the sealing ring body 1 and further improving the sealing performance.

[0028] Example 3: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figure 3, the upper end of the sealing lip 4 is located below the upper end of the sealing ring body 1, and the upper end of the sealing lip 4 is provided with a rounded chamfer 8. The outer side of the lower end of the sealing lip 4 and the outer side of the lower part of the sealing ring body 1 are connected by a rounded transition.

[0029] The upper end of the sealing lip 4 is provided with a rounded chamfer 8, and the outer side of the lower end of the sealing lip 4 and the outer side of the lower part of the sealing ring body 1 are connected by a rounded transition. This makes it easier to install the sealing ring body 1 on the inner wall of the outer pipe 10, improves the adaptability between the sealing ring body 1 and the inner wall of the outer pipe 10, and reduces the installation difficulty.

[0030] Example 4: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figures 1 and 3, the first sealing surface 2 is a cone shape with a smaller top and a larger bottom, and the first sealing surface 2 is provided with 2 to 4 sealing protrusions 4 at intervals from top to bottom. The second sealing surface 3 is a cone shape with a larger top and a smaller bottom.

[0031] According to the requirements, the first sealing surface 2 is provided with three sealing protrusions 4 at intervals from top to bottom. This not only facilitates the production of the sealing protrusions 4, but also ensures that if one of the sealing protrusions 4 fails, the remaining sealing protrusions 4 will make sealing contact with the outer wall of the pipe, thereby ensuring the sealing effect.

[0032] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figure 3, the sealing protrusion 4 is an arc shape with the opening facing outward.

[0033] During use, the arc-shaped sealing protrusion 4 can enhance the sealing effect between the inner side of the sealing ring body 1 and the outer wall of the inner pipe 9. Multiple arc-shaped sealing protrusions 4 can form multiple sealing lines. After the inner side of the sealing ring body 1 is inserted into the pipe, the arc-shaped sealing protrusion 4 is compressed and can fit more tightly with the conical surface of the inner pipe 9, which can not only ensure the sealing effect, but also reduce friction and facilitate disassembly and assembly.

[0034] Example 6: As an optimization of the above examples, as shown in the appendix Figure 1 , 2 As shown in Figure 3, the annular groove 6 is trapezoidal, wider at the top and narrower at the bottom. During use, by setting the trapezoidal annular groove 6, it is easy to separate the sealing lip 4 from the mold after molding, thus ensuring the quality of the sealing lip 4.

[0035] The above technical features constitute various embodiments of this utility model, which have strong adaptability and optimal implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A sealing ring for a PVC pipe socket in an agricultural field, characterized in that The sealing ring includes a circular sealing ring body. The inner side of the sealing ring body includes a first sealing surface and a second sealing surface connected from top to bottom. Both the first sealing surface and the second sealing surface are conical. The first sealing surface is provided with at least two sealing protrusions spaced from top to bottom. A sealing lip is fixed on the outer side of the middle part of the sealing ring body. An upward-opening annular groove is formed between the inner side of the sealing lip and the outer side of the sealing ring body.

2. The agricultural field PVC pipe bell and spigot seal ring of claim 1, wherein The thickness of the sealing ring body corresponding to the position below the sealing lip gradually decreases from top to bottom. At least one annular sealing groove with an outward opening is provided at intervals on the lower outer side of the sealing ring body, and the cross-section of the sealing groove is V-shaped.

3. The agricultural field PVC pipe bell and spigot seal ring of claim 1 or 2, wherein The upper end of the sealing lip is located below the upper end of the sealing ring body. The upper end of the sealing lip has a rounded chamfer, and the outer side of the lower end of the sealing lip transitions with the outer side of the lower part of the sealing ring body through a rounded transition.

4. The agricultural field PVC pipe bell and spigot sealing ring of claim 1 or 2, wherein The first sealing surface is a cone shape with a smaller top and a larger bottom, and there are 2 to 4 sealing protrusions spaced from top to bottom on the first sealing surface. The second sealing surface is also a cone shape with a larger top and a smaller bottom.

5. The agricultural field PVC pipe bell and spigot sealing ring of claim 3, wherein The first sealing surface is a cone shape with a smaller top and a larger bottom, and there are 2 to 4 sealing protrusions spaced from top to bottom on the first sealing surface. The second sealing surface is also a cone shape with a larger top and a smaller bottom.

6. The agricultural field PVC pipe bell and spigot sealing ring of claim 4 wherein The sealing protrusion is an arc shape with the opening facing outwards.

7. The agricultural field PVC pipe bell and spigot sealing ring of claim 3, wherein The sealing protrusion is an arc shape with the opening facing outwards.

8. The agricultural field PVC pipe bell and spigot sealing ring as claimed in claim 1 or 2 or 5 or 6 or 7 wherein The annular groove is trapezoidal, wider at the top and narrower at the bottom.

9. The sealing ring for the socket of a PVC pipe in farmland according to claim 3, characterized in that... The annular groove is trapezoidal, wider at the top and narrower at the bottom.

10. The agricultural field PVC pipe bell and spigot sealing ring of claim 4, wherein The annular groove is trapezoidal, wider at the top and narrower at the bottom.

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