Pipe inner diameter adjusting device

Abstract

The utility model provides a pipeline inner diameter adjusting device, include: expansion piece, expansion piece is located inside the pipeline, just expansion piece outer wall with the pipeline inner wall between formed with make the pipeline inner medium flow through's overflow channel, expansion system, expansion system with expansion piece intercommunication. The utility model discloses when the actual water flow in the pipeline is small, through the inflation system to the inflation piece inside is filled with air, and the inflation piece diameter becomes big, thereby reduces the overflow channel, and then reaches the purpose that the water passing area in the pipeline is reduced, reaches the purpose that the flow rate in the pipeline is improved, avoids the deposition or the blockage in the pipeline, also can avoid the problem that the flow rate is too low to cause the flow real -time monitoring inaccuracy when the low flow.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline flow regulation, and in particular to a pipeline inner diameter regulation device. Background Technology

[0002] During water transportation, water flow and pipeline pressure dynamically change due to various factors (such as differences in water flow at different times, changes in pump station operating status, and partial blockage or leakage in the pipeline). Traditional fixed-diameter water pipelines are difficult to adapt to these changes. This often leads to initial designs based on a large planned scale, using larger pipe diameters, but actual flow rates vary significantly. During actual commissioning, the flow rate may be lower than expected, resulting in slow flow velocity at low flow rates, which can easily cause sedimentation and blockage. This also makes it impossible to accurately measure real-time flow data at low flow rates due to the lower-than-expected flow velocity. Conversely, at high flow rates, excessively fast flow velocity and pressure can cause impact and damage to the pipeline, increasing pipeline losses and pump station energy consumption. Therefore, proposing a device that can automatically adjust the pipeline diameter to adapt to changes in flow and pressure is of significant practical importance. Utility Model Content

[0003] Based on this, the purpose of this utility model is to provide a pipe inner diameter adjustment device that can adjust the pipe diameter to adapt to changes in flow rate and pressure.

[0004] This utility model provides the following technical solution: a pipe inner diameter adjustment device, comprising:

[0005] An expansion member is located inside the pipe; and a flow channel is formed between the outer wall of the expansion member and the inner wall of the pipe to allow the medium inside the pipe to flow through.

[0006] An expansion system, wherein the expansion system is connected to the expansion element;

[0007] The expansion system inputs a medium to the expansion member to cause it to expand, thereby reducing the space of the flow channel; and the expansion system can also output the medium inside the expansion member to cause the expansion member to contract, thereby increasing the space of the flow channel.

[0008] Furthermore, the pipe inner diameter adjustment device also includes a limiting device;

[0009] The limiting device includes an elastic element and a connecting rod; a plurality of the connecting rods are arranged in a ring around the outer wall of the expansion member, and a plurality of the elastic elements are arranged between adjacent connecting rods.

[0010] Furthermore, the multiple elastic elements between adjacent connecting rods are evenly spaced.

[0011] Further, the pipe inner diameter adjusting device further comprises:

[0012] an internal connecting pipeline, which is fixedly connected to the pipeline, wherein the expansion member is fixedly connected to the outer wall of the internal connecting pipeline and is in communication with the internal connecting pipeline, and the expansion system is in communication with the expansion member through the internal connecting pipeline.

[0013] Further, the internal connecting pipeline is in a "U" shape, both ends thereof are fixedly connected to the pipeline, and at least one end thereof penetrates through the pipe wall of the pipeline to communicate with the expansion system; the expansion member is fixedly connected to the outer wall of the middle part of the internal connecting pipeline, and the internal connecting pipeline is provided with a plurality of through holes, and the internal connecting pipeline communicates with the inner side of the expansion member through the through holes.

[0014] Further, both ends of the internal connecting pipeline penetrate through the pipe wall of the pipeline to communicate with the expansion system, and both end portions of the internal connecting pipeline are hermetically and fixedly connected to the pipe wall of the pipeline.

[0015] Further, the expansion system comprises: an air pump, a pressure stabilizing device, a pressure gauge, two external connecting pipelines, a first valve and a second valve; the air pump communicates with the pressure stabilizing device through one of the external connecting pipelines, and the pressure stabilizing device communicates with the internal connecting pipeline through the other external connecting pipeline; the pressure gauge is arranged on the external connecting pipeline between the pressure stabilizing device and the internal connecting pipeline; the first valve is arranged on the external connecting pipeline between the pressure stabilizing device and the internal connecting pipeline; the second valve is arranged on the external connecting pipeline between the pressure stabilizing device and the air pump; by adjusting the opening degrees of the first valve and the second valve, the flow rate of gas flowing into the pressure stabilizing device is adjusted, so as to achieve the pressure stabilizing effect.

[0016] The beneficial effects of the utility model are as follows: when the actual water flow in the pipeline is small, the expansion member is inflated inside through the expansion system, the diameter of the expansion member becomes larger, so as to reduce the flow passage, further achieve the purpose of reducing the water passing area in the pipeline and increasing the flow velocity in the pipeline, avoid sedimentation or blockage inside the pipeline, and also avoid the problem of inaccurate real-time flow monitoring caused by excessively low flow velocity at low flow rates. Brief Description of the Drawings

[0017] Figure 1 is a cross-sectional view of the utility model.

[0018] Figure 2 is a cross-sectional view of the expansion member of the utility model before expansion.

[0019] Figure 3 is a cross-sectional view of the expansion member of the utility model after expansion.

[0020] Figure 4 This is a schematic diagram showing the connection relationship between the limiting spring and the connecting rod of this utility model.

[0021] Figure 5 This is a schematic diagram of an application example of this utility model.

[0022] Figure 6 This is a schematic diagram of application example two of this utility model.

[0023] Figure 7 This is a schematic diagram of application example three of this utility model.

[0024] The labels in the attached diagram are as follows: 1-Air pump, 2-External connection pipe, 3-Pressure stabilizing device, 4-Pressure gauge, 5-Internal connection pipe, 6-Pipe, 7-Limit spring, 8-Connecting rod, 9-Expansion component, 10-Through hole, 11-PLC control cabinet, 12-Flow channel, 13-Water supply equipment, 14-Water tank, 15-First valve, 16-Second valve, 17-Third valve. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Example 1:

[0029] This embodiment provides a pipe inner diameter adjustment device, including: an expansion member 9, an expansion system, and an internal connecting pipe 5;

[0030] like Figures 1-4as shown, the expansion member 9 is located inside the pipeline 6; and a flow passage 12 for the medium in the pipeline 6 to flow through is formed between the outer wall of the expansion member 9 and the inner wall of the pipeline 6;

[0031] In this embodiment, specifically: the expansion member 9 is located at the middle part inside the pipeline 6, is in a columnar shape, and the axis of the expansion member 9 coincides with the axis of the pipeline 6. A flow passage 12 for the medium in the pipeline 6 to flow through is formed between the outer wall of the expansion member 9 and the inner wall of the pipeline 6. In this embodiment, the medium in the pipeline 6 is water. Certainly, the pipeline inner diameter adjusting device of this embodiment can also be used in pipelines 6 for conveying oil or gas; in addition, in this embodiment, the expansion member 9 is an expansion bladder made of materials such as rubber;

[0032] As Figures 2-3 shown, the internal connecting pipeline 5 is fixedly connected to the pipeline 6, the expansion member 9 is fixedly connected to the outer wall of the internal connecting pipeline 5 and communicates with the internal connecting pipeline 5, and the expansion system communicates with the expansion member 9 through the internal connecting pipeline 5;

[0033] In this embodiment, specifically: the internal connecting pipeline 5 is in a "U" shape, and both ends pass through the pipe wall of the pipeline 6 to communicate with the expansion system; both ends of the internal connecting pipeline 5 are in sealed and fixed connection with the pipe wall of the pipeline 6, so as to prevent the medium in the pipeline 6 from leaking from the connection between the two. The manner of realizing the sealed and fixed connection is prior art, which will not be elaborated here; the expansion member 9 is fixedly connected to the outer wall of the middle part of the internal connecting pipeline 5, and a plurality of through holes 10 are opened on the internal connecting pipeline 5, the plurality of through holes 10 are evenly spaced along the length direction of the internal connecting pipeline 5, and the internal connecting pipeline 5 communicates with the inner side of the expansion member 9 through the plurality of through holes 10;

[0034] Further, in other embodiments, the internal connecting pipeline 5 may also have only one end passing through the pipe wall of the pipeline 6 to communicate with the expansion system, and the other end is fixedly connected to the inner wall of the pipeline 6;

[0035] As Figure 1 shown, the expansion system communicates with the expansion member 9; the expansion system inputs a medium into the expansion member 9 to make it expand, thereby reducing the space of the flow passage 12; and the expansion system can also output the medium in the expansion member 9 to make the expansion member 9 contract, thereby increasing the space of the flow passage 12.

[0036] In this embodiment, the expansion system includes: an air pump 1, a pressure stabilizing device 3, a pressure gauge 4, two external connecting pipes 2, a PLC control cabinet 11, a first valve 15, a second valve 16, and a third valve 17. The air pump 1 is connected to the pressure stabilizing device 3 via one of the external connecting pipes 2, and the pressure stabilizing device 3 is connected to an internal connecting pipe 5 via the other external connecting pipe 2. The pressure gauge 4 is installed on the external connecting pipe 2 between the pressure stabilizing device 3 and the internal connecting pipe 5. The first valve 15 is installed on the external connecting pipe 2 between the pressure stabilizing device 3 and the internal connecting pipe 5, and is located between the pressure gauge 4 and the pressure stabilizing device 3. The second valve 16 and the third valve 17 are installed on the external connecting pipe 2 between the pressure stabilizing device 3 and the air pump 1, with the second valve 16 closer to the pressure stabilizing device 3 and the third valve 17 closer to the air pump 1.

[0037] More specifically, one end of one external connecting pipe 2 is fixedly connected to the air pump 1, and the other end is fixedly connected to the pressure stabilizing device 3, so as to realize the connection between the air pump 1 and the pressure stabilizing device 3; one end of another external connecting pipe 2 is connected to the pressure stabilizing device 3, and the other end is connected to the internal connecting pipe 5, so as to realize the connection between the pressure stabilizing device 3 and the internal connecting pipe 5; the pressure gauge 4 is fixedly connected to the external connecting pipe 2 between the pressure stabilizing device 3 and the internal connecting pipe 5 to measure the pressure in the external connecting pipe 2; the first valve 15 and the second valve 16 are regulating valves, and by adjusting the opening degree of the first valve 15 and the second valve 16, the flow rate of gas flowing into the pressure stabilizing device 3 is adjusted, thereby playing a role in stabilizing pressure; the third valve 17 is a shut-off valve used to close the external connecting pipe 2 between the pressure stabilizing device 3 and the air pump 1 when the air pump is under maintenance.

[0038] It can be understood that the air pump 1 sequentially delivers external gas through the external connecting pipe 2, the pressure stabilizing device 3, the external connecting pipe 2 connected to the internal connecting pipe 5, and the internal connecting pipe 5 to the expansion member 9, causing it to expand and thus reducing the space of the flow channel 12. Conversely, the air pump 1 can extract the gas from the expansion member 9, causing it to contract and thus increasing the space of the flow channel 12. Furthermore, by setting a pressure gauge 4, the inflation pressure of the expansion member 9 can be monitored in real time. Combined with the real-time monitoring data of the incoming water flow and the inflation pressure, a linkage control is formed through the PLC control cabinet 11 to realize the adjustment of the expansion member 9, thereby adjusting the space of the flow channel 12, and thus achieving the purpose of intelligently adjusting the inner diameter of the pipe 6. In other words, based on the data of the incoming water flow and the inflation pressure monitored by the pressure gauge 4, the air pump 1 is controlled by the PLC control cabinet 11 to cause the expansion member 9 to contract or expand, adjusting the space of the flow channel 12, thereby intelligently adjusting the inner diameter of the pipe 6. The function of the pressure stabilizing device 3 is to ensure the stability of the air pressure inside the expansion member 9 by inflation and deflation.

[0039] Furthermore, in other embodiments, the medium that can be delivered into the expansion member 9 can be oil or water, and the air pump 1 can be replaced with a water pump to adjust the expansion degree of the expansion member 9.

[0040] In summary, when the actual water flow rate in pipe 6 is low, the expansion system inflates the inside of the expansion component 9, increasing the diameter of the expansion component 9 and thus reducing the flow passage 12. This reduces the water flow area in pipe 6, thereby increasing the flow velocity in pipe 6, preventing sedimentation or blockage inside pipe 6, and also avoiding the problem of inaccurate real-time flow monitoring caused by excessively low flow velocity at low flow rates.

[0041] Example 2:

[0042] The pipe inner diameter adjustment device in this embodiment further includes, based on embodiment one, a limiting device;

[0043] like Figures 2-4 As shown, the limiting device includes an elastic element and a connecting rod 8; multiple connecting rods 8 are arranged in a ring around the outer wall of the expansion member 9, and multiple elastic elements are provided between adjacent connecting rods 8.

[0044] In this embodiment, four connecting rods 8 are fixedly connected to the outer wall of the expansion member 9 in a ring-like manner. In other embodiments, the number of connecting rods 8 can be adjusted according to the actual situation. The distance between the four connecting rods 8 is the same. Multiple limiting springs 7 are arranged along the axial direction between adjacent connecting rods 8. One end of the limiting spring 7 is fixedly connected to one of the adjacent connecting rods 8, and the other end is fixedly connected to another connecting rod 8. The multiple limiting springs 7 between adjacent connecting rods 8 are evenly spaced, and the limiting springs 7 on the same horizontal plane form a ring-shaped group of limiting springs 7.

[0045] It is understandable that when the expansion component 9 expands due to inflation, the distance between adjacent connecting rods 8 increases, and the limiting spring 7 is simultaneously compressed and stretched; when the water flow rate increases, the inflation amount of the expansion component 9 is reduced, the inflation pressure is lowered, the diameter of the expansion component 9 automatically shrinks, the distance between adjacent connecting rods 8 decreases, and the limiting spring 7 automatically retracts to prevent the expansion component 9 from deforming uncontrollably.

[0046] The following are examples of practical applications of Embodiment 1 or Embodiment 2:

[0047] Application Case 1: For example Figure 5 As shown, the pipe 6 is designed and selected according to the planned flow rate, but the designed pipe diameter is large. When the water supply equipment 13 delivers water into the pipe 6, the water flow rate is low. The operator can expand the expansion component 9 through the expansion system to reduce the space of the flow passage 12, thereby adjusting the water flow rate, avoiding sedimentation in the pipe 6, and also ensuring the accuracy of online flow monitoring.

[0048] Application Case 2: When there are multiple pipelines for water distribution, an inner diameter adjustment device of Embodiment 1 or Embodiment 2 can be installed in pipeline 6. By monitoring the water flow data at the rear end of multiple pipelines, the water flow area in each pipeline can be automatically adjusted to ensure that the water loss of each pipeline 6 is consistent when the length and direction of pipeline 6 are different, thus ensuring consistent water volume at the rear end and achieving uniform water distribution.

[0049] Specifically, such as Figure 6 As shown: Multiple pipes 6 are connected from the same pool body, but the lengths and directions of the multiple pipes 6 are not the same. However, it is required that the water flow rate at the end of the delivery pipe is the same. Therefore, the space of the flow channel 12 can be adjusted by adjusting the expansion member 9 to achieve uniform water distribution.

[0050] Application Case 3: For example Figure 7 As shown, two water supply devices 13 draw water from the same point, but the distance between the water supply terminals is different. However, if the water supply volume at the terminals is required to be consistent, the expansion member 9 can be adjusted to adjust the space of the flow channel 12 to achieve consistent water supply volume at the terminals.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pipe inner diameter adjustment device, characterized in that, comprises: an expansion member, wherein the expansion member is located on the inner side of the pipeline; and a flow passage allowing the medium in the pipeline to flow through is formed between the outer wall of the expansion member and the inner wall of the pipeline; an expansion system, wherein the expansion system is in communication with the expansion member; wherein the expansion system inputs a medium into the expansion member to expand the expansion member, thereby reducing the space of the flow passage; and the expansion system can also output the medium in the expansion member to contract the expansion member, thereby increasing the space of the flow passage.

2. The pipe inner diameter adjustment device according to claim 1, characterized in that, The pipeline inner diameter adjusting device further comprises a limiting device; The limiting device comprises elastic members and connecting rods; a plurality of the connecting rods are arranged on the outer wall of the expansion member in a surrounding manner, and a plurality of the elastic members are arranged between every adjacent connecting rods.

3. The pipe inner diameter adjustment device according to claim 2, characterized in that, The plurality of elastic members between adjacent connecting rods are distributed at uniform intervals.

4. The pipe inner diameter adjustment device according to claim 1, characterized in that, The pipeline inner diameter adjusting device further comprises: an inner connecting pipeline, wherein the inner connecting pipeline is fixedly connected with the pipeline, the expansion member is fixedly connected to the outer wall of the inner connecting pipeline and is in communication with the inner connecting pipeline, and the expansion system is in communication with the expansion member through the inner connecting pipeline.

5. The pipe inner diameter adjustment device according to claim 4, characterized in that, The inner connecting pipeline is in a U shape, both ends thereof are fixedly connected with the pipeline, and at least one end penetrates through the pipe wall of the pipeline to be in communication with the expansion system; the expansion member is fixedly connected to the outer wall of the middle part of the inner connecting pipeline, and a plurality of through holes are formed in the inner connecting pipeline, and the inner connecting pipeline is in communication with the inner side of the expansion member through the through holes.

6. The pipe inner diameter adjustment device according to claim 5, characterized in that, Both ends of the inner connecting pipeline penetrate through the pipe wall of the pipeline to be in communication with the expansion system, and both end portions of the inner connecting pipeline are in sealed and fixed connection with the pipe wall of the pipeline.

7. The pipe inner diameter adjustment device according to claim 4, characterized in that, The expansion system comprises: an air pump, a pressure stabilizing device, a pressure gauge, two outer connecting pipelines, a first valve and a second valve; the air pump is in communication with the pressure stabilizing device via one of the outer connecting pipelines, and the pressure stabilizing device is in communication with the inner connecting pipeline via the other outer connecting pipeline; the pressure gauge is arranged on the outer connecting pipeline between the pressure stabilizing device and the inner connecting pipeline; the first valve is arranged on the outer connecting pipeline between the pressure stabilizing device and the inner connecting pipeline; the second valve is arranged on the outer connecting pipeline between the pressure stabilizing device and the air pump; by adjusting the opening degrees of the first valve and the second valve, the flow rate of the gas flowing into the pressure stabilizing device is adjusted, thereby achieving a pressure stabilizing effect.

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