Leakage-proof drain pipe expansion joint

Abstract

The utility model discloses an anti-seepage drain pipe expansion joint, which comprises a drain pipe, a first flange plate, an expansion mechanism and a second flange plate, the drain pipe is communicated and connected with the expansion mechanism through the first flange plate, and the expansion mechanism is far away from the first flange plate and is communicated and connected with the second flange plate. The telescopic mechanism comprises a shell, a folding rubber pipe, a first communicating pipe, a second communicating pipe, a reset assembly, a first telescopic rod, a second telescopic rod, a reset spring and a fixing block, and a sealing assembly is arranged on the contact face of the first communicating pipe and the second communicating pipe. According to the anti-leakage drainage pipe expansion joint, when a folding rubber pipe in the device expands or contracts through a reset assembly in the telescopic mechanism, the situation that the folding rubber pipe is clamped in the moving process of a first communicating pipe and a second communicating pipe in the telescopic mechanism is avoided, and then the displacement of a water pipe is adjusted; therefore, stress generated by thermal expansion and cold contraction caused by temperature change of the pipeline can be discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints for drainage pipes, in particular to an anti-leakage expansion joint for drainage pipes. Background Art

[0002] The expansion joint of the drainage pipe is a pipe connector used in the drainage system. It is mainly used to solve the stress caused by thermal expansion and contraction of the pipe due to temperature changes, and to protect the pipe from damage. The expansion joint is made of PVC material, and its shape is similar to a cylinder with an opening. It has two flanges for connecting the drainage pipe;

[0003] For example, application number CN202020263548.6 discloses a novel anti-leakage expansion joint for a drainage pipe with a reset function. By pulling the inner tube outward, the foldable rubber sleeve can be unfolded to extend the height of the drainage pipe expansion joint. This arrangement is conducive to expanding the adaptability of the drainage pipe expansion joint and reducing the construction difficulty of construction personnel; the built-in rubber in the above-mentioned device is used to adjust the displacement of the water pipe, and then adjust the stress caused by thermal expansion and contraction of the pipeline due to temperature changes. However, there is a situation where the rubber sleeve expands too much, resulting in the above-mentioned difficulty in shrinking. When the inner tube is reset, the rubber sleeve expands, and the inner tube is easily clamped to the rubber sleeve.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a leakage-proof drainage pipe expansion joint is proposed to achieve a more practical purpose. Utility Model Content

[0005] The utility model aims to provide a leakage-proof expansion joint for a drainage pipe, so as to solve the problem of easy clamping of a rubber sleeve in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a leakage-proof expansion joint for a drainage pipe, comprising a drainage pipe, a first flange, a expansion mechanism and a second flange, wherein the drainage pipe is connected to the expansion mechanism through the first flange, and the expansion mechanism is connected to the second flange away from the first flange, the expansion mechanism comprises a shell and a folded rubber tube, a folded rubber tube is arranged on one side of the inner cavity of the shell, and the folded rubber tube is connected to the first flange through a water pipe, a first connecting tube is arranged on the side of the folded rubber tube away from the first flange, and the first connecting tube is embedded in one end of the second connecting tube, the A reset assembly is provided on the outer diameter surfaces of the first connecting tube and the second connecting tube, and the reset assembly includes a first telescopic rod and a second telescopic rod, the first telescopic rod is a hollow structure, and one end of the second telescopic rod is embedded in the inner side of the first telescopic rod, a reset spring is installed on one end of the second telescopic rod embedded in the inner side of the first telescopic rod, and one end of the reset spring away from the second telescopic rod is fixedly connected to the inner wall of the first telescopic rod through a fixing block, one end of the first telescopic rod away from the second telescopic rod is fixedly connected to the outer diameter surface of the second connecting tube, and one end of the second telescopic rod away from the first telescopic rod is fixedly connected to the outer diameter surface of the first connecting tube.

[0007] Furthermore, a sealing assembly is provided on the contact surface between the first connecting tube and the second connecting tube, and the sealing assembly includes a Glyd ring, a Step seal and a Y-type sealing ring. Two groups of the Y-type sealing ring and the Step seal are provided, and the two groups of the Step seals are provided between the two groups of the Y-type sealing rings. A Glyd ring is provided between the two groups of the Step seals.

[0008] Furthermore, the first connecting tube forms a telescopic structure with the second connecting tube through a sealing assembly, four groups of reset assemblies are provided, and the four groups of sealing assemblies are evenly and equidistantly distributed on the outer diameter surfaces of the first connecting tube and the second connecting tube, and the first telescopic rod forms a reciprocating motion structure with the second telescopic rod through a reset spring.

[0009] Furthermore, the shapes of the Glyd ring and the Step seal are both rectangular, and the Glyd ring and the Step seal are specifically composed of an O-ring and a polytetrafluoroethylene ring stacked together, and the Y-type sealing ring is specifically made of a fluororubber, and the outer surfaces of the Y-type sealing ring, the Glyd ring and the Step seal are all provided with sealing rings, and a piston wear-resistant ring is provided between the Y-type sealing ring, the Glyd ring and the Step seal.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the anti-leakage drainage pipe expansion joint prevents the first connecting pipe and the second connecting pipe in the expansion mechanism from being clamped by the folded rubber tube during the movement process when the folded rubber tube in the device is expanded or contracted through the reset component in the expansion mechanism, thereby adjusting the discharge volume of the water pipe to discharge the stress caused by thermal expansion and contraction of the pipeline due to temperature changes;

[0011] The anti-leakage drainage pipe expansion joint installs the expansion mechanism between the drainage pipe through the first flange and the second flange, wherein the folded rubber tube in the inner cavity of the shell in the expansion mechanism and the second connecting pipe are connected to the water pipe. When the water in the water pipe is subjected to pressure or the pipe generates stress due to thermal expansion and contraction caused by temperature changes, the folded rubber tube is made of elastic material and thus deformed due to the change in water pressure. When the folded rubber tube is deformed, the folded rubber tube drives the first connecting pipe to move. At this time, a relative displacement occurs between the first connecting pipe and the second connecting pipe. Since the two ends of the reset component are respectively connected to the outer diameter surfaces of the first connecting pipe and the second connecting pipe, when the folded rubber tube drives the first connecting pipe to move, the first connecting pipe is deformed due to the reset component. The first connecting tube is elastically moved by the action of the component, and the first connecting tube is elastically moved due to the reset component. Since the first telescopic rod and the second telescopic rod are respectively fixedly connected to the second connecting tube and the first connecting tube, and a reciprocating motion structure is formed between the first telescopic rod and the second telescopic rod through the reset spring and the fixed block, the first connecting tube is finally moved with the folding rubber tube. When the folding rubber tube is not subjected to pressure or the pipeline does not generate stress due to thermal expansion and contraction caused by temperature changes, the folding rubber tube returns to its original state, and the reset spring is not subjected to force, and the distance between the first telescopic rod and the second telescopic rod is reset, thereby eliminating the stress caused by thermal expansion and contraction of the pipeline due to temperature changes through the entire telescopic mechanism, so as to increase the service life of the pipeline and achieve the effect of protecting the pipeline.

[0012] The leak-proof drainage pipe expansion joint ensures that when relative movement occurs between the second connecting pipe and the first connecting pipe, the pipeline can drain water normally without leaking through a sealing component, wherein a Gly ring, a Step seal, and a Y-shaped sealing ring are used to isolate the inner cavities of the second connecting pipe and the first connecting pipe from the inner cavity of the shell, and the sealing component does not affect the relative movement between the second connecting pipe and the first connecting pipe, and can avoid water leakage at the connection between the second connecting pipe and the first connecting pipe, thereby increasing the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a leakage-proof expansion joint for a drainage pipe according to the utility model;

[0014] Figure 2 This is a front view structural diagram of a leakage-proof expansion joint for a drainage pipe according to the utility model;

[0015] Figure 3 The utility model is a front view structural schematic diagram of a leakage-proof drainage pipe expansion joint sealing component.

[0016] In the figure: 1. drain pipe; 2. first flange; 3. telescopic mechanism; 301. shell; 302. folded rubber tube; 303. first connecting pipe; 304. second connecting pipe; 305. reset assembly; 306. first telescopic rod; 307. second telescopic rod; 308. reset spring; 309. fixed block; 4. second flange; 5. sealing assembly; 501. grid ring; 502. step seal; 503. Y-type sealing ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figures 1 to 3 The utility model provides a technical solution: a leakage-proof expansion joint of a drainage pipe, comprising a drainage pipe 1, a first flange 2, a expansion mechanism 3, and a second flange 4. The drainage pipe 1 is connected to the expansion mechanism 3 through the first flange 2, and the expansion mechanism 3 is connected to the second flange 4 away from the first flange 2. The expansion mechanism 3 comprises a shell 301 and a folded rubber tube 302. A folded rubber tube 302 is arranged on one side of the inner cavity of the shell 301, and the folded rubber tube 302 is connected to the first flange 2 through a water pipe. A first connecting pipe 303 is arranged on the side of the folded rubber tube 302 away from the first flange 2, and the first connecting pipe 303 is embedded in one end of the second connecting pipe 304. A reset component 305 is arranged on the outer diameter surface of the first connecting pipe 303 and the second connecting pipe 304, and the reset component 305 comprises a first telescopic rod 306 and a second telescopic rod 307. The first telescopic rod 306 is a hollow structure, and One end of the second telescopic rod 307 is embedded in the inner side of the first telescopic rod 306, and a return spring 308 is installed at one end of the second telescopic rod 307 embedded in the inner side of the first telescopic rod 306, and the end of the return spring 308 away from the second telescopic rod 307 is fixedly connected to the inner wall of the first telescopic rod 306 through a fixing block 309, and the end of the first telescopic rod 306 away from the second telescopic rod 307 is fixedly connected to the outer diameter surface of the second connecting tube 304, and the end of the second telescopic rod 307 away from the first telescopic rod 306 is fixedly connected to the outer diameter surface of the first connecting tube 303, and the first connecting tube 303 forms a telescopic structure with the second connecting tube 304 through a sealing component 5, and four groups of return components 305 are provided, and the four groups of sealing components 5 are evenly and equidistantly distributed on the outer diameter surfaces of the first connecting tube 303 and the second connecting tube 304, and the first telescopic rod 306 forms a reciprocating motion structure with the second telescopic rod 307 through the return spring 308;

[0019] The telescopic mechanism 3 is installed between the drain pipe 1 by using the first flange 2 and the second flange 4, wherein the folded rubber tube 302 and the second connecting tube 304 in the inner cavity of the shell 301 in the telescopic mechanism 3 are connected to the water pipe. When the water in the water pipe is subjected to pressure or the pipe generates stress due to thermal expansion and contraction caused by temperature changes, since the folded rubber tube 302 is made of elastic material, the folded rubber tube 302 will be deformed due to the change in water pressure. Therefore, the folded rubber tube 302 is deformed, and the folded rubber tube 302 will drive the first connecting tube 303 to move. At this time, a relative displacement occurs between the first connecting tube 303 and the second connecting tube 304. Since the two ends of the reset component 305 are respectively fixedly connected to the outer diameter surfaces of the first connecting tube 303 and the second connecting tube 304, the folded rubber tube 302 drives the first connecting tube 303 to move. The first connecting tube 303 is deformed due to the reset component 3 05 and elastically move, and the first connecting pipe 303 elastically moves due to the reset assembly 305, and the first telescopic rod 306 and the second telescopic rod 307 are respectively fixedly connected to the second connecting pipe 304 and the first connecting pipe 303, and the first telescopic rod 306 and the second telescopic rod 307 are used to form a reciprocating motion structure using a reset spring 308 and a fixed block 309, so that the first connecting pipe 303 moves with the folding rubber tube 302. When the folding rubber tube 302 is not subjected to pressure or the pipeline does not generate stress due to thermal expansion and contraction caused by temperature changes, the folding rubber tube 302 returns to its original state, and the reset spring 308 is not subjected to force, and the distance between the first telescopic rod 306 and the second telescopic rod 307 is reset, and then the entire telescopic mechanism 3 is used to eliminate the stress caused by thermal expansion and contraction of the pipeline due to temperature changes, so as to increase the service life of the pipeline and achieve the effect of protecting the pipeline;

[0020] The contact surface of the first connecting pipe 303 and the second connecting pipe 304 is provided with a sealing assembly 5, and the sealing assembly 5 includes a Gley ring 501, a Step seal 502 and a Y-type sealing ring 503. Two groups of Y-type sealing rings 503 and Step seals 502 are provided. The two groups of Step seals 502 are arranged between the two groups of Y-type sealing rings 503. A Gley ring 501 is arranged between the two groups of Step seals 502. The Gley ring 501 and the Step seal 502 are both rectangular in shape. The Gley ring 501 and the Step seal 502 are specifically formed by superimposing an O-ring and a polytetrafluoroethylene ring. The Y-type sealing ring 503 is specifically made of a fluororubber. The outer shapes of the Y-type sealing ring 503, the Gley ring 501 and the Step seal 502 are Sealing rings are provided on the surface, and piston wear-resistant rings are provided between the Y-shaped sealing ring 503, the grid ring 501 and the step seal 502. The sealing component 5 is used to ensure that when the second connecting pipe 304 and the first connecting pipe 303 move relative to each other, the pipeline can drain water normally without leaking. The grid ring 501, the step seal 502 and the Y-shaped sealing ring 503 are used to isolate the inner cavity of the second connecting pipe 304 and the first connecting pipe 303 from the inner cavity of the shell 301, and the sealing component 5 does not affect the relative movement between the second connecting pipe 304 and the first connecting pipe 303, and can avoid water leakage at the connection between the second connecting pipe 304 and the first connecting pipe 303, thereby increasing the reliability of the device.

[0021] Working principle: When using a leak-proof drainage pipe expansion joint, first use the first flange 2 and the second flange 4 to install the expansion mechanism 3 between the drainage pipe 1, wherein the folded rubber tube 302 and the second connecting pipe 304 in the inner cavity of the shell 301 in the expansion mechanism 3 are connected to the water pipe. When the water in the water pipe is subjected to pressure or the pipe generates stress due to thermal expansion and contraction caused by temperature changes, since the folded rubber tube 302 is made of elastic material, the folded rubber tube 302 will be deformed due to the change in water pressure. Therefore, the folded rubber tube 302 will be deformed, and the folded rubber tube 302 will drive the first connecting pipe 303 to move, and a relative displacement will occur between the first connecting pipe 303 and the second connecting pipe 304. Since the two ends of the reset component 305 are respectively connected to the outer diameter surfaces of the first connecting pipe 303 and the second connecting pipe 304, the folded rubber tube 302 drives the first connecting pipe 303 to move, and at the same time, the first connecting pipe 303 moves elastically due to the action of the reset component 305, and the first The connecting pipe 303 moves elastically due to the reset assembly 305, and the first telescopic rod 306 and the second telescopic rod 307 are fixedly connected to the second connecting pipe 304 and the first connecting pipe 303 respectively, and the first telescopic rod 306 and the second telescopic rod 307 form a reciprocating motion structure through the reset spring 308 and the fixed block 309, so that the first connecting pipe 303 moves with the folding rubber tube 302. When the folding rubber tube 302 is not subjected to pressure or the pipeline does not generate stress due to thermal expansion and contraction caused by temperature changes, the folding rubber tube 302 returns to its original state, and the reset spring 308 is not subjected to force, and the distance between the first telescopic rod 306 and the second telescopic rod 307 is reset. The sealing assembly 5 is used to ensure that when the second connecting pipe 304 and the first connecting pipe 303 move relative to each other, the pipeline drains water normally without leaking, and the inner cavity of the second connecting pipe 304 and the first connecting pipe 303 and the inner cavity of the shell 301 are isolated by the Gray ring 501, the step seal 502, and the Y-shaped sealing ring 503.

Claims

1. A leak-proof drainage pipe expansion joint, comprising a drainage pipe (1), a first flange (2), a expansion mechanism (3) and a second flange (4), Features: The drain pipe (1) is connected to the telescopic mechanism (3) via a first flange (2), and the telescopic mechanism (3) is connected to the second flange (4) away from the first flange (2). The telescopic mechanism (3) comprises a shell (301) and a folded rubber tube (302). A folded rubber tube (302) is provided on one side of the inner cavity of the shell (301), and the folded rubber tube (302) is connected to the first flange (2) via a water pipe. A first connecting tube (303) is provided on the side of the folded rubber tube (302) away from the first flange (2), and the first connecting tube (303) is embedded in one end of the second connecting tube (304). A reset assembly (305) is provided on the outer diameter surfaces of the first connecting tube (303) and the second connecting tube (304), and the reset assembly (305) ) comprises a first telescopic rod (306) and a second telescopic rod (307), wherein the first telescopic rod (306) is of a hollow structure, and one end of the second telescopic rod (307) is embedded in the inner side of the first telescopic rod (306), and a return spring (308) is installed at one end of the second telescopic rod (307) embedded in the inner side of the first telescopic rod (306), and the end of the return spring (308) away from the second telescopic rod (307) is fixedly connected to the inner wall of the first telescopic rod (306) through a fixing block (309), the end of the first telescopic rod (306) away from the second telescopic rod (307) is fixedly connected to the outer diameter surface of the second connecting tube (304), and the end of the second telescopic rod (307) away from the first telescopic rod (306) is fixedly connected to the outer diameter surface of the first connecting tube (303).

2. The anti-leakage expansion joint for drainage pipe according to claim 1, Features: A sealing assembly (5) is provided on the contact surface between the first connecting tube (303) and the second connecting tube (304), and the sealing assembly (5) includes a Gly ring (501), a Step seal (502) and a Y-type sealing ring (503), and two groups of the Y-type sealing ring (503) and the Step seal (502) are provided, and the two groups of the Step seal (502) are provided between the two groups of the Y-type sealing ring (503), and a Gly ring (501) is provided between the two groups of the Step seal (502).

3. The anti-leakage expansion joint for drainage pipe according to claim 2, Features: The first connecting tube (303) forms a telescopic structure with the second connecting tube (304) through a sealing assembly (5); four groups of the reset assembly (305) are provided, and the four groups of the sealing assembly (5) are evenly and equidistantly distributed on the outer diameter surfaces of the first connecting tube (303) and the second connecting tube (304); the first telescopic rod (306) forms a reciprocating structure with the second telescopic rod (307) through a reset spring (308).

4. The anti-leakage expansion joint for drainage pipe according to claim 3, Features: The shapes of the Glyd ring (501) and the Step seal (502) are both rectangular. The Glyd ring (501) and the Step seal (502) are specifically composed of an O-ring and a polytetrafluoroethylene ring stacked together. The Y-shaped sealing ring (503) is specifically made of a fluororubber. The outer surfaces of the Y-shaped sealing ring (503), the Glyd ring (501) and the Step seal (502) are all provided with sealing rings. A piston wear-resistant ring is provided between the Y-shaped sealing ring (503), the Glyd ring (501) and the Step seal (502).

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