Coastal building drain pipe sealing connection structure

Abstract

This invention relates to the field of pipeline connection technology, and in particular to a sealing connection structure for drainage pipelines in coastal buildings; it includes an outer pipe, a connecting pipe, a sealing layer, a push ring, and a sealing ring; the invention uses the cooperation of the push ring and the annular inclined groove to compress and deform the sealing ring, so that it fits tightly against the outer wall of the pipeline, thus sealing and fixing the pipeline inside the connecting pipe. At the same time, when the pipeline is displaced, the liquid in the hollow inner cavity of the sealing layer is pushed from one side to the other side, causing the sealing layer on the opposite side to expand to compensate for the sealing gap. This solves the technical problems of unreliable pipeline fixing and the inability to adaptively adjust the sealing pressure after fixing, which leads to sealing failure when the foundation settles.

Description

Technical Field

[0001] This invention relates to the field of pipeline connection technology, and in particular to a sealing connection structure for drainage pipelines in coastal buildings. Background Technology

[0002] Drainage pipes are an indispensable infrastructure in building engineering, and are widely used in urban municipal engineering, industrial plants and civil buildings. The sealing connection structure of drainage pipes is a key component of the pipeline system, and its sealing performance directly affects the normal operation and service life of the pipeline system.

[0003] Currently, there are two main categories of sealing connections for drainage pipelines: rigid connections and flexible connections. Rigid connections cannot withstand a certain amount of axial and angular displacement. Flange connections, for example, belong to this category. Flange interfaces achieve sealing by tightening the connecting bolts to compress the sealing ring. This is commonly used in pipeline systems that require connection to valves or other equipment or frequent disassembly. Rigid connections do not allow for relative displacement of the pipeline, and the interface cannot adapt to pipeline deformation when uneven settlement occurs in the foundation. Flexible connections achieve sealing by setting elastic sealing elements between pipe sections, allowing the pipeline a certain degree of axial expansion and contraction and angular deflection. Compared to rigid interfaces, flexible interfaces are more adaptable to the foundation and are currently the mainstream connection form for drainage pipelines.

[0004] However, the following problems exist in the current use of connectors: In the existing sealing connection structure of drainage pipes, the seal between the pipe and the connecting pipe relies solely on the initial pre-tightening force of the sealing ring or packing. The pipe is not reliably fixed inside the connecting pipe. When the pipeline system encounters uneven settlement of the foundation, relative displacement occurs between the pipe and the connecting pipe. One side of the seal is excessively squeezed, while the contact pressure on the other side is sharply reduced, leading to seal failure. At the same time, the sealing layer set at the pipe interface relies solely on its own elastic deformation to provide sealing pressure. Its sealing pressure is fixed and cannot adaptively adjust the sealing pressure of each part according to the direction and amount of pipe displacement. The side with insufficient pressure forms a leakage channel, and the sealing performance decreases accordingly.

[0005] Therefore, the problem of unreliable pipe fixing and inability to adaptively adjust sealing pressure in existing drainage pipe sealing connection structures, leading to sealing failure during foundation settlement, is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the above problems, the present invention provides a sealing connection structure for drainage pipes in coastal buildings to solve the aforementioned technical problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a sealing connection structure for drainage pipes in coastal buildings, comprising: an outer pipe, the inner walls of both ends of which are provided with annular grooves.

[0008] Two connecting pipes are movably installed in corresponding annular grooves. The inner wall of the connecting pipe is uniformly provided with annular inclined grooves along its circumference. The cross-section of the annular inclined grooves is an isosceles trapezoidal structure.

[0009] The sealing layer is uniformly and fixedly installed on the inner ring wall of the outer tube, and the sealing layer is located between the two connecting tubes. The sealing layer has a hollow inner cavity filled with liquid.

[0010] Four push rings are installed in pairs in two annular grooves. The outer side of the push rings is provided with an inclined surface, and the connecting pipe is provided with a push part.

[0011] Four sealing rings are fixedly installed on four push rings respectively, and the sealing rings are provided with slopes that cooperate with the annular grooves.

[0012] When the pipe is inserted into the connecting pipe, the pushing part abuts against the inclined surface of the pushing ring and pushes the pushing ring to move horizontally. The sealing ring moves with the pushing ring. The slope of the sealing ring cooperates with the groove wall of the annular inclined groove, so that the sealing ring is squeezed and deformed and tightly fits against the outer wall of the pipe, sealing and fixing the pipe inside the connecting pipe.

[0013] When the pipeline is displaced, one side of the sealing layer is squeezed by the pipeline, reducing the volume of its hollow cavity. The liquid is pushed to the other side of the sealing layer, causing the sealing layer on the other side to expand to compensate for the sealing gap.

[0014] As a preferred embodiment, the connecting pipe is fixedly mounted with a shaft column on both the front and rear outer surfaces, and the outer pipe has shaft holes that correspond one-to-one with the shaft column, and the shaft column is rotatably installed in the shaft hole.

[0015] As a preferred embodiment, the pushing part includes a threaded hole coaxially opened on the shaft and communicating with the mounting groove. A stud is threaded into the threaded hole. The lower end of the stud has a tapered structure, and the tapered structure of the stud abuts against the inclined surface of the pushing ring.

[0016] As a preferred embodiment, the outer edge of the connecting pipe has a rounded transition structure, and the rounded side of the connecting pipe fits into the inner wall of the annular groove.

[0017] As a preferred embodiment, the outer tube has a through hole that communicates with the hollow inner cavity, and an injection head is installed inside the through hole.

[0018] As a preferred embodiment, a sealing block is installed inside the outer port of the shaft hole, and the sealing block is interference-fitted with the shaft hole.

[0019] As a preferred embodiment, both ends of the outer tube are equipped with elastic curtains.

[0020] As a preferred embodiment, the liquid is an incompressible liquid medium.

[0021] The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: First, the present invention uses the cooperation of the pushing ring and the annular inclined groove to make the sealing ring squeezed and deformed to fit tightly against the outer wall of the pipe, thereby sealing and fixing the pipe inside the connecting pipe. At the same time, when the pipe is displaced, the liquid in the hollow inner cavity of the sealing layer is pushed from one side to the other side, causing the sealing layer on the opposite side to expand to compensate for the sealing gap. This solves the technical problem that the pipe is not reliably fixed in the existing drainage pipe sealing connection structure and the sealing pressure cannot be adaptively adjusted after fixing, resulting in sealing failure when the foundation settles.

[0022] Second, the present invention uses the cooperation of the pushing ring and the annular inclined groove to compress and deform the sealing ring so that it fits tightly against the outer wall of the pipe, thereby sealing and fixing the pipe inside the connecting pipe. This avoids the problem of sealing failure caused by relative displacement of the pipe due to foundation settlement, and ensures the reliable fixation of the pipe inside the connecting pipe.

[0023] Third, this invention utilizes the principle that when the liquid inside the hollow cavity of the sealing layer is displaced in the pipeline, it is pushed from one side to the other, causing the sealing layer on the opposite side to expand to compensate for the sealing gap. This allows the sealing pressure to be adaptively adjusted according to the direction and amount of pipeline displacement, avoiding the problem of accelerated aging and failure of the sealing layer due to local stress concentration and the formation of leakage channels on the side with insufficient pressure. This ensures the dynamic balance of sealing pressure under the condition of foundation settlement.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention after a portion of the outer tube has been cut off; Figure 3 This is a schematic diagram of the connecting tube of the present invention; Figure 4 for Figure 1 A sectional view; Figure 5 This is a cross-sectional view of the structure between the stud and the push ring of the present invention; Figure 6 for Figure 5 Enlarged view of the structure at point A in the middle.

[0027] Reference numerals: 1. Outer tube; 10. Injection head; 11. Sealing block; 12. Elastic curtain; 2. Connecting tube; 20. Shaft; 21. Stud; 3. Sealing layer; 4. Push ring; 5. Sealing ring. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] like Figure 1 and Figure 2 As shown, a sealing connection structure for drainage pipes in coastal buildings includes an outer pipe 1, with annular grooves on the inner walls at both ends.

[0030] like Figure 2 , Figure 3 and Figure 4 As shown, two connecting pipes 2 are movably installed in corresponding annular grooves. The inner wall of the connecting pipe 2 is uniformly provided with annular inclined grooves along its circumference, and the cross-section of the annular inclined grooves is an isosceles trapezoidal structure.

[0031] like Figure 2 , Figure 4 and Figure 5 As shown, the sealing layer 3 is uniformly and fixedly installed on the inner ring wall of the outer tube 1, and the sealing layer 3 is located between the two connecting tubes 2. The sealing layer 3 has a hollow inner cavity filled with liquid.

[0032] like Figure 5 and Figure 6 As shown, four push rings 4 are installed in pairs in two annular inclined grooves. The outer side of the push rings 4 is provided with an inclined surface, and the connecting pipe 2 is provided with a push part.

[0033] like Figure 6 As shown, four sealing rings 5 ​​are fixedly installed on four pushing rings 4, and the sealing rings 5 ​​are provided with slopes that cooperate with the annular grooves.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the connecting pipe 2 has a shaft post 20 fixedly installed on both the front and rear outer surfaces. The outer pipe 1 has shaft holes corresponding to the shaft post 20, and the shaft post 20 is rotatably installed in the shaft hole.

[0035] like Figure 1 , Figure 2 and Figure 4 As shown, the outer tube 1 has a through hole that communicates with the hollow inner cavity, and an injection head 10 is installed inside the through hole.

[0036] like Figure 1 , Figure 2 and Figure 4 As shown, both ends of the outer tube 1 are provided with elastic curtains 12, which are used to prevent external impurities from entering the interior of the connection structure.

[0037] like Figure 4 and Figure 5 As shown, the liquid is an incompressible liquid medium. The reason for choosing an incompressible liquid medium is that when the volume of the sealing layer 3 decreases due to compression by the pipeline on one side, the incompressible liquid cannot be further compressed and can only be pushed to the other side, thereby driving the sealing layer 3 on the other side to expand outward to compensate for the sealing gap, realizing the instantaneous transmission and dynamic rebalancing of sealing pressure. If a compressible medium is used, the medium itself will be compressed when squeezed, the pressure transmission will be delayed and the transmission efficiency will be low, and the above-mentioned adaptive sealing effect cannot be achieved.

[0038] like Figures 1 to 6 As shown, in actual operation, the two sections of drainage pipe to be connected are inserted into the connecting pipes 2 at both ends of the outer pipe 1. The pipe ends first enter the elastic curtain 12 at the port of the outer pipe 1. The elastic curtain 12 undergoes elastic deformation when the pipe passes through, and its inner edge forms an elastic abutment with the outer wall of the pipe. This allows the pipe to pass freely, and also seals the port after the pipe is in place, preventing external impurities such as seawater and silt from entering the interior of the connection structure.

[0039] After passing through the elastic curtain 12, the pipe continues to advance and enters the connecting pipe 2. The end of the pipe reaches the position of the push ring 4 inside the connecting pipe 2. A sealing ring 5 is fixedly installed on the outside of the push ring 4. At this time, the push ring 4 is not yet driven by the push part. Both the push ring 4 and the sealing ring 5 are in the initial position before they are working. When the pipe passes through the push ring 4 and the sealing ring 5, there is a sufficient gap between the sealing ring 5 and the outer wall of the pipe, so that no contact or frictional resistance is generated, ensuring that the pipe can pass through the connecting pipe 2 smoothly and continue to advance without obstruction.

[0040] After passing through connecting pipe 2, the pipe continues to advance into the outer pipe 1, with its end reaching the location of sealing layer 3. Sealing layer 3 is fixedly installed on the inner ring wall of outer pipe 1 and has a ring structure with an inner diameter smaller than the outer diameter of the pipe. When the end of the pipe begins to enter sealing layer 3, sealing layer 3 is squeezed by the pipe and undergoes elastic deformation. Sealing layer 3 is stretched and evenly covers the outer wall of the pipe circumferentially. As the pipe continues to advance, sealing layer 3 maintains a tight fit with the outer wall of the pipe under its own elastic restoring force. Finally, after the pipe is pushed into place, an initial sealing contact is formed. At this time, the liquid in the hollow inner cavity of sealing layer 3 is in a state of static equilibrium. The liquid is evenly distributed along the circumference of sealing layer 3, forming a uniform supporting pressure on the inner wall of sealing layer 3. After the pipe is pushed into place, the end of the pipe passes through sealing layer 3 and extends into the inner wall of outer pipe 1, located in the area between the two connecting pipes 2. Sealing layer 3 simultaneously seals the outer walls of both sections of the pipe.

[0041] After the pipeline is pushed into place, the pushing part set on the connecting pipe 2 drives the pushing ring 4 to move horizontally. When the pushing ring 4 moves horizontally, the sealing ring 5 moves synchronously with the pushing ring 4. The slope on the sealing ring 5 matches the isosceles trapezoidal groove wall of the annular groove. During the movement of the sealing ring 5 with the pushing ring 4, its slope slides relative to the groove wall of the annular groove. Since the cross-section of the annular groove is an isosceles trapezoidal structure, the sealing ring 5 is squeezed and produces radial inward compression deformation. After compression deformation, the inner diameter of the sealing ring 5 shrinks, and the inner wall tightly fits the outer wall of the pipeline, applying a uniform radial clamping force to the pipeline, thereby squeezing and confining the pipeline within the connecting pipe 2, and simultaneously achieving a seal at that point. The greater the distance that the pushing ring 4 moves horizontally along the annular groove, the greater the amount of compression deformation of the sealing ring 5, and the greater the clamping force on the outer wall of the pipeline, thus realizing the positive correlation adjustment between the limiting force and the sealing force and the pushing displacement.

[0042] When uneven settlement occurs in the foundation of a coastal building, the pipe inserted into the connecting pipe 2 is displaced with the foundation. The pipe causes the connecting pipe 2 to move accordingly within the annular groove. Since the pushing ring 4 has been pushed into place by the pushing part and the pipe is squeezed and confined within the connecting pipe 2, the sealing ring 5 always maintains a tight state against the outer wall of the pipe, maintaining the relative fixation between the pipe and the connecting pipe 2. At the same time, the displacement of the pipe inside the outer pipe 1 acts synchronously on the sealing layer 3. When the pipe is displaced to one side, the outer wall of the pipe squeezes a local area of ​​the sealing layer 3 opposite to that side. The sealing layer 3 is deformed by the compression of the pipe on that side. The sealing layer 3 has an annular structure with a hollow inner cavity filled with an incompressible liquid medium.

[0043] When the sealing layer 3 is compressed on this side, the volume of the hollow inner cavity on that side decreases accordingly. The squeezed liquid is pushed to the other side through the hollow inner cavity. After receiving the liquid, the sealing layer 3 on the other side expands outward, increasing its volume and fitting more tightly to the outer wall of the pipe. This compensates for the sealing gap caused by displacement. It is by utilizing the volume rigidity of incompressible liquid that the volume reduction on one side of the sealing layer 3 can be instantly and equally converted into the volume increase on the other side. This ensures that the contact pressure between the sealing layer 3 and the outer wall of the pipe is always maintained within the effective sealing range, avoiding pressure loss and response delay caused by medium compression.

[0044] Both sealing mechanisms described above function simultaneously. The cooperation between the pushing ring 4 and the pushing part causes the sealing ring 5 to be squeezed and deformed, tightly pressing against the outer wall of the pipe, thus sealing and fixing the pipe inside the connecting pipe 2, forming the first seal. After being squeezed by the pipe, the sealing layer 3 expands on the opposite side through the pressure of the incompressible liquid, forming the second seal. The two seals are independent of each other and complement each other, jointly ensuring that the connection structure always maintains a reliable sealing effect under the condition of foundation settlement, effectively solving the technical problem of seal failure caused by uneven foundation settlement.

[0045] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the pushing part includes a threaded hole coaxially opened on the shaft post 20 and communicating with the mounting groove. A stud 21 is threadedly connected to the threaded hole. The lower end of the stud 21 has a tapered structure, and the tapered structure of the stud 21 abuts against the inclined surface of the pushing ring 4.

[0046] like Figure 2 , Figure 3 and Figure 4 As shown, the outer edge of the connecting pipe 2 has a rounded transition structure. The rounded side of the connecting pipe 2 fits against the inner wall of the annular groove. This rounded transition structure ensures that when the connecting pipe 2 moves within the annular groove, the outer edge of the connecting pipe 2 and the inner wall of the annular groove are in contact with a rounded surface. This reduces the frictional resistance and wear between the connecting pipe 2 and the inner wall of the annular groove during movement, avoids stress concentration or jamming due to sharp edges, and ensures that the connecting pipe 2 can move smoothly within the annular groove.

[0047] like Figure 1 , Figure 5 and Figure 6 As shown, a sealing block 11 is installed inside the outer port of the shaft hole. The sealing block 11 is interference-fitted with the shaft hole to seal the outer port of the shaft hole, preventing external seawater, mud and other impurities from entering the shaft hole from the outer port of the shaft hole. This avoids impurities interfering with or causing wear on the rotational fit between the shaft post 20 and the shaft hole, ensuring that the shaft post 20 can rotate smoothly in the shaft hole for a long time.

[0048] like Figures 5 to 6 As shown, during actual operation, after the pipeline is pushed into place, the stud 21 is screwed into the threaded hole on the shaft 20. The tapered structure at the lower end of the stud 21 moves towards the pushing ring 4 as the stud 21 is screwed in. The tapered surface of the tapered structure abuts against the inclined surface on the outside of the pushing ring 4. As the stud 21 continues to be screwed in, the tapered structure applies a force along the direction of the annular groove to the pushing ring 4 through the inclined surface, pushing the pushing ring 4 to move along the annular groove. When the pushing ring 4 moves, it drives the sealing ring 5 to move synchronously. The slope on the sealing ring 5 slides relative to the isosceles trapezoidal groove wall of the annular groove. Since the cross-section of the annular groove is an isosceles trapezoidal structure, the sealing ring 5 is squeezed and produces radial inward compression deformation. The inner wall is tightly attached to the outer wall of the pipeline, squeezing and confining the pipeline within the connecting pipe 2. The greater the depth of the stud 21 being screwed in, the greater the pressure of the sealing ring 5 on the outer wall of the pipeline.

[0049] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0050] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sealing connection structure for drainage pipes in coastal buildings, characterized in that, include: The outer tube has annular grooves on the inner walls at both ends; Two connecting pipes are movably installed in corresponding annular grooves. The inner wall of the connecting pipes is uniformly provided with annular inclined grooves along its circumference. The cross-section of the annular inclined grooves is an isosceles trapezoidal structure. The sealing layer is uniformly and fixedly installed on the inner ring wall of the outer tube, and the sealing layer is located between the two connecting tubes. The sealing layer has a hollow inner cavity filled with liquid. Four push rings are installed in two annular inclined grooves, with each pair of two rings. The outer side of the push rings is provided with an inclined surface, and the connecting pipe is provided with a push part. Four sealing rings are fixedly installed on four push rings respectively, and the sealing rings are provided with slopes that cooperate with the annular grooves; When the pipe is inserted into the connecting pipe, the pushing part abuts against the inclined surface of the pushing ring and pushes the pushing ring to move horizontally. The sealing ring moves with the pushing ring. The slope of the sealing ring cooperates with the groove wall of the annular inclined groove, so that the sealing ring is squeezed and deformed and tightly fits against the outer wall of the pipe, sealing and fixing the pipe inside the connecting pipe. When the pipeline is displaced, one side of the sealing layer is squeezed by the pipeline, reducing the volume of its hollow cavity. The liquid is pushed to the other side of the sealing layer, causing the sealing layer on the other side to expand to compensate for the sealing gap.

2. The sealing connection structure for coastal building drainage pipes according to claim 1, characterized in that: The connecting pipe has shafts fixedly installed on both the front and rear outer surfaces. The outer pipe has shaft holes that correspond one-to-one with the shafts, and the shafts are rotatably installed in the shaft holes.

3. The sealing connection structure for coastal building drainage pipes according to claim 2, characterized in that: The pushing part includes a threaded hole coaxially opened on the shaft and communicating with the mounting groove. A stud is threaded into the threaded hole. The lower end of the stud has a tapered structure, and the tapered structure of the stud abuts against the inclined surface of the pushing ring.

4. The sealing connection structure for coastal building drainage pipes according to claim 1, characterized in that: The outer edge of the connecting pipe has a rounded transition structure, and the rounded side of the connecting pipe fits into the inner wall of the annular groove.

5. A sealing connection structure for coastal building drainage pipes according to claim 1, characterized in that: The outer tube has a through hole that communicates with the hollow inner cavity, and an injection head is installed inside the through hole.

6. A sealing connection structure for coastal building drainage pipes according to claim 2, characterized in that: A sealing block is installed inside the outer port of the shaft hole, and the sealing block is interference-fitted with the shaft hole.

7. A sealing connection structure for coastal building drainage pipes according to claim 1, characterized in that: Both ends of the outer tube are equipped with elastic curtains.

8. A sealing connection structure for coastal building drainage pipes according to claim 1, characterized in that: The liquid is an incompressible liquid medium.

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