Plastic steel pipe joint sealing structure

Abstract

The utility model relates to the technical field of plastic steel pipe joints, and discloses a plastic steel pipe joint sealing structure which comprises a pipe body and a joint sleeve, the joint sleeve is spirally sleeved on the top of the pipe body, a sealing piece for improving sealing performance is arranged on the outer side of the pipe body, and sealing groove groups are arranged on the inner walls of two ports of the joint sleeve corresponding to the sealing piece. A fixing ring is fixedly installed in the middle of the connector sleeve, and first sealing gaskets are bonded to the upper side and the lower side of the fixing ring in a gluing mode. The top of the pipe body is sleeved with the screwing connector sleeve, the second sealing gasket and the first sealing gasket can be tightly attached together, then sealing can be conducted from the interior, meanwhile, the annular strip can be embedded in the embedding groove, the sealing performance can be further improved, and meanwhile the sealing performance can be further improved along with downward movement of the screwing connector sleeve relative to the pipe body. The first sealing strip and the second sealing strip on the outer side of the pipe body can be tightly embedded into the first sealing groove and the second sealing groove correspondingly, then sealing can be conducted from the outer side, and the situation of leakage at the threaded connection position is avoided.

Description

Technical Field

[0001] This utility model relates to the field of plastic steel pipe joint technology, specifically a plastic steel pipe joint sealing structure. Background Technology

[0002] Plastic-coated steel pipe is a high-performance, corrosion-resistant, and pressure-resistant pipe material, consisting of an outer plastic layer and an inner steel layer. Its structure includes an outer plastic layer, an inner steel layer, and an adhesive layer. The outer plastic layer is typically made of high-quality, corrosion-resistant polyethylene, the inner steel layer is made of high-strength steel, and the adhesive layer is responsible for tightly bonding the two together to form a unified pipe.

[0003] When connecting plastic steel pipes, joints are required. Existing joints are mostly installed by connecting them in a spiral manner. However, there is a certain gap between the threads, which affects the sealing performance and causes leakage at the connection point when the plastic steel pipe is used. Therefore, further improvements can be made. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides the following technical solution: a plastic steel pipe joint sealing structure, comprising a pipe body and a joint sleeve, wherein the joint sleeve is spirally fitted onto the top of the pipe body, and a sealing element for improving sealing performance is provided on the outer side of the pipe body, and sealing grooves are provided on the inner walls of both ends of the joint sleeve corresponding to the sealing element, a fixing ring is fixedly installed in the middle of the joint sleeve, and a sealing gasket is glued to both the upper and lower sides of the fixing ring, and the top of the pipe body has an inwardly extending flange, and a second sealing gasket is twisted and glued to the top of the flange.

[0005] As an optimization, both sealing gasket one and sealing gasket two are annular gaskets made of rubber.

[0006] As an optimization, the surface of the second sealing gasket has a raised annular strip, and the surface of the first sealing gasket has a groove, with the annular strip correspondingly embedded in the groove.

[0007] As an optimization, the annular strip is provided with three channels, which are equally spaced and diffused, and the groove is provided with three channels corresponding to the annular strip.

[0008] As an optimization, the sealing element includes a sealing strip 1 and a sealing strip 2 disposed on the outside of the pipe body, and the sealing strip 2 is provided in two sets, respectively located on the upper and lower sides of the sealing strip 1, and the sealing strip 1 and the sealing strip 2 are respectively embedded in the sealing groove set.

[0009] As an optimization, the sealing groove group includes a sealing groove one corresponding to the sealing strip one and a sealing groove two corresponding to the sealing strip two, wherein the sealing strip one and the sealing strip two are respectively embedded in the sealing groove one and the sealing groove two.

[0010] As an optimization, the cross-section of the first sealing strip is an isosceles trapezoid, and the cross-section of the second sealing strip is circular.

[0011] The beneficial effects of this utility model are:

[0012] This plastic-coated steel pipe joint sealing structure, by screwing the joint sleeve onto the top of the pipe body, causes the sealing gasket one and the sealing gasket two to fit tightly together, thereby achieving a seal from the inside. At the same time, the annular strip is embedded in the groove, which further improves the sealing performance. Meanwhile, as the joint sleeve moves downward relative to the pipe body, the sealing strip one and the sealing strip two on the outside of the pipe body are tightly embedded in the sealing groove one and the sealing groove two, respectively, thereby achieving a seal from the outside and preventing leakage at the threaded connection. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the sealing gasket structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the external sealing structure of this utility model.

[0017] In the diagram: 1. Pipe body; 2. Connector sleeve; 3. Sealing groove assembly; 4. Fixing ring; 5. Sealing gasket one; 6. Flange; 7. Sealing gasket two; 8. Annular strip; 9. Groove; 10. Sealing strip one; 11. Sealing strip two; 12. Sealing groove one; 13. Sealing groove two. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-2 A sealing structure for a plastic steel pipe joint includes a pipe body 1 and a joint sleeve 2. The joint sleeve 2 is spirally fitted onto the top of the pipe body 1. A sealing element for improving sealing performance is provided on the outer side of the pipe body 1. Sealing grooves 3 are provided on the inner walls of both ends of the joint sleeve 2 corresponding to the sealing element. A fixing ring 4 is fixedly installed in the middle of the joint sleeve 2. Sealing gaskets 1 and 2 are glued to the upper and lower sides of the fixing ring 4. The top of the pipe body 1 has an inwardly extending flange 6, and a sealing gasket 2 is twisted and glued to the top of the flange 6. Both sealing gaskets 1 and 2 are annular gaskets made of rubber. By screwing the joint sleeve 2 onto the outer side of the top of the pipe body 1, the sealing gasket 2 7 on the top of the flange 6 will fit tightly against the sealing gasket 1 5 on the bottom side of the fixing ring 4, thereby sealing from the inside and improving the sealing performance. The sealing element can further improve the sealing performance from the outside.

[0021] Please see Figure 2-3 The surface of the second sealing gasket 7 has raised annular strips 8, and the surface of the first sealing gasket 5 has grooves 9, and the annular strips 8 are embedded in the grooves 9. There are three annular strips 8, which are equidistantly distributed. The grooves 9 have three grooves corresponding to the annular strips 8. When the first sealing gasket 5 and the second sealing gasket 7 on both sides are tightly fitted, the annular strips 8 will be embedded in the grooves 9, thereby further improving the sealing performance.

[0022] Please see Figure 4 The sealing element includes a sealing strip 10 and a sealing strip 11 located on the outside of the pipe body 1. There are two sets of sealing strips 11, located on the upper and lower sides of the sealing strip 10 respectively. The cross-section of the sealing strip 10 is an isosceles trapezoid, and the cross-section of the sealing strip 11 is circular. The sealing strips 10 and 11 are respectively embedded in the sealing groove group 3. The sealing groove group 3 includes a sealing groove 12 corresponding to the sealing strip 10 and a sealing groove 13 corresponding to the sealing strip 11. The sealing strips 10 and 11 are respectively embedded in the sealing groove 12 and the sealing groove 13. By tightly embedding the sealing strips 10 and 11 on the outside of the pipe body 1 in the sealing groove 12 and the sealing groove 13, sealing can be achieved from the outside, avoiding leakage at the threaded connection.

[0023] When in use, first screw the connector sleeve 2 onto the top of the tube body 1. As the connector sleeve 2 is gradually screwed on, the sealing gasket 2 7 on the top of the flange 6 will fit tightly against the sealing gasket 5 on the bottom side of the fixing ring 4, thus sealing from the inside. When the sealing gaskets 5 and 7 on both sides fit tightly, the annular strip 8 will be embedded in the groove 9, thus further improving the sealing performance.

[0024] At the same time, as the screw-on fitting sleeve 2 moves downward relative to the pipe body 1, the sealing strip 10 and sealing strip 11 on the outside of the pipe body 1 will be tightly embedded in the sealing groove 12 and sealing groove 13 respectively, thereby sealing from the outside and preventing leakage at the threaded connection.

[0025] In summary, the sealing structure of this plastic steel pipe joint, by screwing the joint sleeve 2 onto the top of the pipe body 1, allows the sealing gasket 2 7 and sealing gasket 5 to fit tightly together, thereby achieving an internal seal. Simultaneously, the annular strip 8 is embedded in the groove 9, further improving the sealing performance. Furthermore, as the joint sleeve 2 moves downwards relative to the pipe body 1, the sealing strip 10 and sealing strip 11 on the outside of the pipe body 1 are tightly embedded in the sealing groove 12 and sealing groove 13 respectively, thus achieving an external seal and preventing leakage at the threaded connection.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings.

[0028] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A sealing structure for a plastic-coated steel pipe joint, comprising a pipe body (1) and a joint sleeve (2), characterized in that: The connector sleeve (2) is spirally sleeved on the top of the tube body (1). The outer side of the tube body (1) is provided with a sealing element to improve sealing performance. The inner walls of the two ends of the connector sleeve (2) are provided with sealing groove groups (3) corresponding to the sealing element. A fixing ring (4) is fixedly installed in the middle of the connector sleeve (2). Sealing gaskets (5) are glued to the upper and lower sides of the fixing ring (4). The top of the tube body (1) has an inwardly extending flange (6), and a sealing gasket (7) is twisted and glued to the top of the flange (6).

2. The sealing structure for the plastic-coated steel pipe joint according to claim 1, characterized in that: Both the sealing gasket one (5) and the sealing gasket two (7) are annular gaskets made of rubber.

3. The sealing structure for the plastic-coated steel pipe joint according to claim 2, characterized in that: The surface of the second sealing gasket (7) has a raised annular strip (8), and the surface of the first sealing gasket (5) has a groove (9), and the annular strip (8) is correspondingly embedded in the groove (9).

4. The sealing structure for the plastic-coated steel pipe joint according to claim 3, characterized in that: The annular strip (8) has three channels, which are arranged in an equidistant, diffused manner, and the groove (9) has three channels corresponding to the annular strip (8).

5. The sealing structure for the plastic-coated steel pipe joint according to claim 1, characterized in that: The sealing element includes a sealing strip one (10) and a sealing strip two (11) disposed on the outside of the pipe body (1). The sealing strip two (11) is provided in two sets, located on the upper and lower sides of the sealing strip one (10) respectively. The sealing strip one (10) and the sealing strip two (11) are respectively embedded in the sealing groove group (3).

6. The sealing structure for the plastic-coated steel pipe joint according to claim 5, characterized in that: The sealing groove group (3) includes a sealing groove one (12) corresponding to the sealing strip one (10) and a sealing groove two (13) corresponding to the sealing strip two (11), wherein the sealing strip one (10) and the sealing strip two (11) are respectively embedded in the sealing groove one (12) and the sealing groove two (13).

7. The sealing structure for the plastic-coated steel pipe joint according to claim 5, characterized in that: The cross-section of the first sealing strip (10) is an isosceles trapezoid, and the cross-section of the second sealing strip (11) is circular.

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