Anti-overflow connector increasing device for inner insertion pipe

Abstract

The utility model relates to the technical field of pipeline non-return, in particular to an inner inserting pipe anti-overflow additional connecting device which comprises a one-way valve and a sealing ring, the one-way valve comprises an upper connector and a lower connector, the upper connector is movably connected with the lower connector, a connecting groove is formed in the outer side of the lower connector, a connecting sleeve is arranged on the outer side of the upper connector, and the sealing ring is arranged on the connecting sleeve. The connecting sleeve is movably arranged on the outer side of the connecting groove in a sleeving mode, the bottom of the connecting sleeve and the connecting groove jointly form a height-adjustable mounting groove, and the sealing ring is arranged in the mounting groove. The deformation degree of the sealing ring can be controlled, so that the sealing ring can be tightly attached to the interior of the pipeline, the sealing and fixing effects are achieved, an existing pipeline can be conveniently reconstructed and upgraded, cutting or gluing is not needed, and the convenience of pipeline refitting is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline anti-reverse technology, and more specifically, to an internal insertion tube anti-backflow extension device. Background Technology

[0002] In drainage systems and industrial pipelines, preventing liquid backflow is a crucial requirement for ensuring the safe operation of pipelines. Existing technologies commonly employ anti-backflow devices such as fixed check valves and mechanical seals. For example, traditional check valves achieve unidirectional flow through the automatic opening and closing of the valve disc and are primarily used in newly constructed pipeline systems. However, for retrofitting existing pipelines, it is typically necessary to cut holes in the pipe and weld flanges to install anti-backflow components, or rely on adhesives to fix the sealing structure. These technologies are widely used in municipal drainage, building sewers, and chemical pipelines to prevent pollution, equipment damage, or system malfunctions caused by liquid backflow.

[0003] However, existing technologies have significant shortcomings: First, installation methods involving cutting pipes or welding flanges are complex, requiring the shutdown of the pipeline and the use of specialized equipment, resulting in high modification costs, long cycles, and damage to the structural integrity of the pipeline. Second, sealing devices relying on adhesives are limited by adhesive curing time and environmental conditions, leading to low installation efficiency and long-term seal failure due to adhesive aging. These problems restrict the application of existing technologies in rapid pipeline modification and emergency repairs, making it difficult to meet the demand for efficient and non-destructive installation.

[0004] Therefore, there is an urgent need for an internal anti-backflow device that can be quickly installed without cutting pipes or using adhesives, in order to improve the convenience and reliability of pipe modification. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology in terms of complex pipeline modification processes, and to provide an internal insertion anti-backflow connector that can be quickly installed without cutting pipes or using adhesives.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] An anti-backflow extension device for an internal insertion cannula is provided, comprising a one-way valve and a sealing ring. The one-way valve includes an upper connector and a lower connector, the upper connector and the lower connector being movably connected. The lower connector has a connecting groove on its outer side, and the upper connector has a connecting sleeve on its outer side. The connecting sleeve is movably fitted onto the outside of the connecting groove, and the bottom of the connecting sleeve and the connecting groove together form an adjustable height mounting groove. The sealing ring is installed in the mounting groove.

[0008] This internal insertion anti-backflow adapter is used on drain pipes with an inner diameter slightly larger than that of this device. With this setup, when the internal insertion anti-backflow adapter needs to be installed inside the drain pipe, the user first connects the upper connector and the lower connector and moves them towards each other. The connecting sleeve is fitted onto the outside of the connecting groove. The bottom of the connecting sleeve, the part of the connecting groove not covered by the connecting sleeve, and the bottom of the connecting groove together form a height-adjustable mounting groove. The sealing ring is installed in the mounting groove, and by adjusting the distance between the upper and lower connectors, the upper and lower sides of the mounting groove clamp the sealing ring. Then, the adapter is inserted into the drain pipe. By adjusting the distance between the upper and lower connectors, the height of the mounting groove is reduced. The sealing ring is compressed and elastically deforms outwards. The deformed sealing ring tightly abuts against the inner wall of the drain pipe, forming an interference fit, thus fixing the adapter inside the drain pipe. No pipe sawing or adhesive is required, greatly improving the convenience of pipe modification.

[0009] Preferably, both the upper connector and the lower connector are cylindrical structures.

[0010] Preferably, the sealing ring is made of a material with low elastic modulus that is easily deformable.

[0011] Preferably, the one-way valve further includes a floating element, the upper connector is provided with a through hole, the cross-sectional area of ​​the through hole is smaller than the cross-sectional area of ​​the floating element, the lower connector is provided with a bracket for supporting the floating element, a drainage channel is formed between the through hole and the bracket, and the floating element is movably installed in the drainage channel.

[0012] With this configuration, when the water flows normally down the drain pipe, the floating component falls onto the bracket under gravity. The water flows through the through hole at the top of the upper connector into the drainage channel and then flows out through the side of the bracket, without obstructing the normal drainage of the pipe. When backflow occurs in the drain pipe, the water level rises, and the floating component rises with the water level. When the floating component rises to the through hole, because the cross-section of the floating component is larger than the cross-section of the through hole, the floating component can block and seal the through hole, preventing the rising water level from flowing back through the through hole.

[0013] Preferably, the lower connector is further provided with a guide groove on its inner side, and the floating component is provided with a slider on its side, the slider being slidably connected to the guide groove.

[0014] With this configuration, when the floating component rises with the water level, the slider slides in the guide groove, which limits the movement direction of the floating component and prevents it from floating around during the rise. This ensures that the floating component can completely cover the through hole and reduces the probability of water seepage when the drain pipe flows backward.

[0015] Preferably, the periphery of the floating component has an arc-shaped structure, and the bottom of the through hole has a rounded corner structure corresponding to the periphery of the floating component.

[0016] With this configuration, when backflow occurs in the drain pipe, the rounded corner structure at the bottom of the through hole can fit between the periphery of the floating component and the through hole, which helps to increase the sealing between the floating component and the through hole and further reduces the probability of water seeping out of the through hole when the drain is blocked.

[0017] Preferably, the inner wall of the connecting sleeve is threadedly connected to the outer wall of the connecting groove.

[0018] With this configuration, when it is necessary to adjust the distance between the upper connector and the lower connector to change the height of the mounting groove, the user can rotate the upper connector to make the connecting sleeve rotate along the thread of the connecting groove, thereby changing the distance between the upper connector and the lower connector, thus controlling the height of the mounting groove, and adjusting the deformation of the sealing ring to achieve installation.

[0019] Preferably, the connecting sleeve is slidably inserted into the connecting groove, and the one-way valve further includes an adjusting component for adjusting the distance between the upper connector and the lower connector, the adjusting component being movably inserted through the upper connector and the lower connector.

[0020] With this configuration, the user can adjust the distance between the upper connector and the lower connector using the adjustment component.

[0021] Preferably, the upper connector is provided with a first adjustment hole, the lower connector is provided with a second adjustment hole corresponding to the position of the first adjustment hole, the adjustment component includes a bolt and a nut, the nut is embedded in the second adjustment hole, and the bolt passes through the first adjustment hole and the nut in the second adjustment hole for threaded connection.

[0022] With this configuration, when the height of the mounting groove needs to be adjusted, the user can rotate the bolt. The nut on the bolt abuts against the upper connector, and the nut is installed in the second adjustment hole. When the bolt is rotated, the distance between the nut and the bolt changes, thereby causing the upper connector and the lower connector to move towards each other or away from each other, thus changing the height of the mounting groove and adjusting the deformation of the sealing ring.

[0023] Preferably, there are at least three first adjustment holes, and the distance between two adjacent first adjustment holes is equal. The number of second adjustment holes and the number of adjustment components are the same as the number of first adjustment holes.

[0024] This configuration helps maintain balance during the adjustment process, reduces stress concentration, and extends the lifespan of the device.

[0025] Preferably, the bottom of the connecting sleeve and the bottom of the connecting groove are both inclined, and the mounting groove forms a dovetail groove structure.

[0026] With this design, the mounting groove of the dovetail groove structure can limit the sealing ring, reducing the probability of the sealing ring detaching from the mounting groove during deformation.

[0027] Preferably, the top of the upper connector has a funnel-shaped structure, and the through hole is located in the middle of the funnel structure.

[0028] This design allows water to flow smoothly from the top of the connector into the through hole, reducing the accumulation of dirt and silt and decreasing the likelihood of blockage.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] (1) By setting the sealing ring and the mounting groove, the deformation degree of the sealing ring can be controlled, so that the sealing ring can fit tightly with the inside of the pipe, thereby forming a sealing and fixing effect, which makes it easy to modify and upgrade the existing pipe without cutting or gluing, greatly improving the convenience of pipe modification.

[0031] (2) By setting up the floating part and the through hole, the floating part and the through hole can be tightly closed, which reduces the possibility of water seeping out of the through hole when overflowing and improves the anti-overflow effect.

[0032] (3) The adjustment component allows the user to adjust the height of the mounting groove, thereby adjusting the sealing performance between the sealing ring and the installation pipe. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an internal insertion tube anti-backflow extender according to the present invention;

[0034] Figure 2 This is a schematic diagram of the lower connector structure of an internal insertion tube anti-backflow extender according to this utility model;

[0035] Figure 3 This is a schematic diagram of the internal structure of an internal insertion tube anti-backflow extender according to the present invention;

[0036] Figure 4 This is a schematic diagram of the installation of an internal insertion tube anti-backflow extender according to the present invention.

[0037] The markings in the diagram are explained below:

[0038] 1. One-way valve; 11. Upper connector; 111. Connecting sleeve; 112. Through hole; 113. First adjusting hole; 12. Lower connector; 121. Connecting groove; 122. Bracket; 123. Guide groove; 13. Floating component; 131. Slider; 114. Second adjusting hole; 14. Adjusting assembly; 141. Bolt; 142. Nut; 2. Sealing ring; 3. Mounting groove; 4. Drain pipe. Detailed Implementation

[0039] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0040] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0041] Example 1

[0042] like Figures 1 to 4 The first embodiment of the internal insertion tube anti-backflow extension device of this utility model is shown, including a one-way valve 1 and a sealing ring 2. The one-way valve 1 includes an upper connector 11 and a lower connector 12. The upper connector 11 and the lower connector 12 are movably connected. The lower connector 12 is provided with a connecting groove 121 on the outside. The upper connector 11 is provided with a connecting sleeve 111 on the outside. The connecting sleeve 111 is movably sleeved on the outside of the connecting groove 121, and the bottom of the connecting sleeve 111 and the connecting groove 121 together form an adjustable height mounting groove 3. The sealing ring 2 is installed in the mounting groove 3.

[0043] This internal insertion anti-backflow connector is used for drainage pipes with an inner diameter slightly larger than that of this device. With this setup, when an internal anti-backflow adapter needs to be installed inside the drain pipe 4, the user first connects the upper connector 11 and the lower connector 12 and moves them towards each other. The connecting sleeve 111 is fitted onto the outside of the connecting groove 121. The bottom of the connecting sleeve 111, the part of the connecting groove 121 not covered by the connecting sleeve 111, and the bottom of the connecting groove 121 together form a height-adjustable mounting groove 3. The sealing ring 2 is installed in the mounting groove 3, and by adjusting the distance between the upper connector 11 and the lower connector 12, the upper and lower sides of the mounting groove 3 are clamped together to tighten the sealing ring 2. Then, the adapter is inserted into the drain pipe 4, and by adjusting the distance between the upper connector 11 and the lower connector 12, the height of the mounting groove 3 is reduced. The sealing ring 2 is compressed and elastically deformed outward. The deformed sealing ring 2 is tightly abutted against the inner wall of the drain pipe 4 to form an interference fit, thereby fixing the adapter inside the drain pipe 4 without the need for pipe sawing or glue, greatly improving the convenience of pipe modification.

[0044] As one embodiment of this utility model, both the upper connector 11 and the lower connector 12 are cylindrical structures, and the sealing ring 2 is made of a material with low elastic modulus that is easy to deform.

[0045] As one embodiment of the present invention, the one-way valve 1 also includes a floating member 13. The upper connector 11 is provided with a through hole 112, the cross-sectional area of ​​the through hole 112 is smaller than the cross-sectional area of ​​the floating member 13, and the lower connector 12 is provided with a bracket 122 for supporting the floating member 13. A drainage channel is formed between the through hole 112 and the bracket 122, and the floating member 13 is movably installed in the drainage channel.

[0046] With this configuration, when the water in the drain pipe 4 flows normally downwards, the floating component 13 falls onto the bracket 122 under the action of gravity. The water flows through the through hole 112 at the top of the upper connector 11 into the drainage channel and then flows out through the side of the bracket 122, without obstructing the normal drainage of the pipe. When backflow occurs in the drain pipe 4, the water level in the drain pipe 4 rises, and the floating component 13 rises with the water level. When the floating component 13 rises to the through hole 112, because the cross-section of the floating component 13 is larger than the cross-section of the through hole 112, the floating component 13 can block and seal the through hole 112, preventing the rising water level from flowing back through the through hole 112.

[0047] As one embodiment of this utility model, the lower connector 12 is also provided with a guide groove 123 on the inner side, and the floating member 13 is provided with a slider 131 on the side, and the slider 131 is slidably connected to the guide groove 123.

[0048] With this configuration, when the floating component 13 rises with the water level, the slider 131 slides in the guide groove 123, which can limit the movement direction of the floating component 13, prevent the floating component 13 from floating around during the rise, ensure that the floating component 13 can completely cover the through hole 112, and reduce the probability of water seepage when the drain pipe 4 flows backward.

[0049] As one embodiment of this utility model, the floating member 13 has an arc-shaped structure around its periphery, and the bottom of the through hole 112 is provided with a rounded corner structure corresponding to the periphery of the floating member 13.

[0050] With this configuration, when backflow occurs in the drain pipe 4, the rounded corner structure of the periphery of the floating part 13 and the bottom of the through hole 112 can fit together, which helps to increase the sealing between the floating part 13 and the through hole 112, and further reduces the probability of water seeping out from the through hole 112 when the drain is blocked.

[0051] In one embodiment of this utility model, the inner wall of the connecting sleeve 111 is threadedly connected to the outer wall of the connecting groove 121.

[0052] With this setup, when it is necessary to adjust the distance between the upper connector 11 and the lower connector 12 to change the height of the mounting groove 3, the user can rotate the upper connector 11 to make the connecting sleeve 111 rotate along the thread of the connecting groove 121, thereby changing the distance between the upper connector 11 and the lower connector 12, thus controlling the height of the mounting groove 3 and adjusting the degree of deformation of the sealing ring 2 to achieve installation.

[0053] Example 2

[0054] The following is a second embodiment of the internal insertion tube anti-backflow expansion device of this utility model. This embodiment is similar to embodiment 1, except that the connection method between the upper connector 11 and the lower connector 12 is different, and it also includes an adjustment component 14.

[0055] As one embodiment of the present invention, the connecting sleeve 111 and the connecting groove 121 are slidably inserted into each other. The one-way valve 1 also includes an adjusting component 14 for adjusting the distance between the upper connector 11 and the lower connector 12. The adjusting component 14 is movably inserted through the upper connector 11 and the lower connector 12.

[0056] With this setup, the user can adjust the distance between the upper connector 11 and the lower connector 12 by adjusting component 14.

[0057] As one embodiment of this utility model, the upper connector 11 is provided with a first adjustment hole 113, and the lower connector 12 is provided with a second adjustment hole 114 corresponding to the position of the first adjustment hole 113. The adjustment component 14 includes a bolt 141 and a nut 142. The nut 142 is embedded in the second adjustment hole 114, and the bolt 141 passes through the first adjustment hole 113 and is threadedly connected to the nut 142 in the second adjustment hole 114.

[0058] With this setup, when the height of the mounting groove 3 needs to be adjusted, the user can rotate the bolt 141. The nut on the bolt 141 abuts against the upper connector 11, and the nut 142 is installed in the second adjustment hole 114. When the bolt 141 rotates, the distance between the nut 142 and the nut will change, thereby causing the upper connector 11 and the lower connector 12 to move towards each other or away from each other, thus changing the height of the mounting groove 3 and adjusting the deformation of the sealing ring 2.

[0059] As one embodiment of this utility model, there are at least three first adjustment holes 113, and the distance between two adjacent first adjustment holes 113 is equal. The number of second adjustment holes 114 and adjustment components 14 are the same as the number of first adjustment holes 113.

[0060] This configuration helps maintain balance during the adjustment process, reduces stress concentration, and extends the lifespan of the device.

[0061] Example 3

[0062] The following is a third embodiment of the internal insertion tube anti-backflow expansion device of this utility model. This embodiment is similar to embodiment 1, except that the structure of the mounting groove 3 and the upper connector 11 are different.

[0063] In one embodiment of this utility model, the bottom of the connecting sleeve 111 and the bottom of the connecting groove 121 are both inclined, and the mounting groove 3 forms a dovetail groove structure.

[0064] With this configuration, the mounting groove 3 of the dovetail groove structure can limit the sealing ring 2, reducing the probability that the sealing ring 2 will detach from the mounting groove 3 during deformation.

[0065] As one embodiment of this utility model, the top of the upper connector 11 has a funnel-shaped structure, and the through hole 112 is located in the middle of the funnel structure.

[0066] This design allows water to flow smoothly from the top of the upper connector 11 into the through hole 112, reducing the accumulation of dirt and silt and decreasing the probability of blockage.

[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An internal insertion tube anti-backflow expansion device, characterized in that, The device includes a one-way valve (1) and a sealing ring (2). The one-way valve (1) includes an upper connector (11) and a lower connector (12). The upper connector (11) and the lower connector (12) are movably connected. The lower connector (12) has a connecting groove (121) on its outer side. The upper connector (11) has a connecting sleeve (111) on its outer side. The connecting sleeve (111) is movably fitted on the outside of the connecting groove (121). The bottom of the connecting sleeve (111) and the connecting groove (121) together form an adjustable height mounting groove (3). The sealing ring (2) is installed in the mounting groove (3).

2. The anti-backflow connector for the internal insertion cannula according to claim 1, characterized in that, The one-way valve (1) also includes a floating element (13). The upper connector (11) is provided with a through hole (112). The cross-sectional area of ​​the through hole (112) is smaller than that of the floating element (13). The lower connector (12) is provided with a bracket (122) for supporting the floating element (13). A drainage channel is formed between the through hole (112) and the bracket (122). The floating element (13) is movably installed in the drainage channel.

3. The internal insertion cannula anti-backflow expansion device according to claim 2, characterized in that, The floating component (13) has an arc-shaped structure around its periphery, and the bottom of the through hole (112) has a rounded corner structure corresponding to the periphery of the floating component (13).

4. The anti-backflow connector for the internal insertion cannula according to claim 2, characterized in that, The lower connector (12) is also provided with a guide groove (123) on its inner side, and a slider (131) is provided on the side of the floating part (13), and the slider (131) is slidably connected to the guide groove (123).

5. The internal insertion cannula anti-backflow expansion device according to any one of claims 1 to 3, characterized in that, The inner wall of the connecting sleeve (111) is threadedly connected to the outer wall of the connecting groove (121).

6. The internal insertion cannula anti-backflow expansion device according to any one of claims 1 to 4, characterized in that, The connecting sleeve (111) is slidably inserted into the connecting groove (121). The one-way valve (1) also includes an adjusting component (14) for adjusting the distance between the upper connector (11) and the lower connector (12). The adjusting component (14) is movably inserted through the upper connector (11) and the lower connector (12).

7. The internal insertion cannula anti-backflow expansion device according to claim 6, characterized in that, The upper connector (11) is provided with a first adjustment hole (113), and the lower connector (12) is provided with a second adjustment hole (114) corresponding to the position of the first adjustment hole (113). The adjustment assembly (14) includes a bolt (141) and a nut (142). The nut (142) is embedded in the second adjustment hole (114), and the bolt (141) passes through the first adjustment hole (113) and is threadedly connected to the nut (142) in the second adjustment hole (114).

8. The anti-backflow connector for the internal insertion cannula according to claim 7, characterized in that, There are at least three first adjustment holes (113), and the distance between two adjacent first adjustment holes (113) is equal. The number of second adjustment holes (114) and adjustment components (14) is the same as that of the first adjustment holes (113).

9. The anti-backflow connector for the internal insertion cannula according to claim 1, characterized in that, The bottom of the connecting sleeve (111) and the bottom of the connecting groove (121) are both inclined, and the mounting groove (3) forms a dovetail groove structure.

10. The anti-backflow connector for the internal insertion cannula according to claim 2, characterized in that, The top of the upper connector (11) has a funnel-shaped structure, and the through hole (112) is located in the middle of the funnel structure.

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