A device for accelerated corrosion testing of water supply pipes

Abstract

The utility model discloses a water supply pipeline corrosion acceleration test device for carrying out corrosion test to experimental water pipe, local pipe ring surface, including full pipe test module and local test module, full pipe test module includes cavity, water supply pipe, and the both sides of cavity are provided with water supply pipe, and water supply pipe is connected with experimental water pipe through reducing joint, and experimental water pipe is located in the middle part of cavity, and local test module includes bottom plate, pressure water pipe, a plurality of pressure pipe bending plate, soil cavity, the pressure pipe bending plate is pressed in the opening place of pressure water pipe to the local pipe ring surface, and the both ends of pressure pipe bending plate are detachably connected on the bottom plate through bolt, the utility model discloses including full pipe test module and local test module two kinds of experimental mode, and the flowing water with pressure is arranged in the water pipe in the acceleration test process, to simulate normal use condition, and the simulation soil condition is set according to the actual use condition on the outside, and the acceleration corrosion effect is simulated through the enlargement of some parameters, and the pipeline corrosion acceleration test is completed.

Description

Technical Field

[0001] This utility model relates to the technical field of corrosion testing devices, specifically a corrosion acceleration testing device for water supply pipelines. Background Technology

[0002] Cast iron water supply pipelines are an important component of urban infrastructure, primarily used in municipal water supply and industrial water transmission systems. They are mainly made of ductile iron, and due to their high pressure resistance, resistance to soil stress deformation, and good seismic resistance, they are widely used in underground pipe network laying, especially suitable for areas with complex geological conditions or prone to settlement. Corrosion directly affects the service life of cast iron pipelines, mainly stemming from electrochemical corrosion, microbial corrosion (such as sulfate-reducing bacteria), and chemical media erosion (Cl⁻, ...). To assess the long-term performance of water supply pipelines, accelerated corrosion testing is required. Currently, there is no complete set of accelerated corrosion testing equipment for urban water supply pipelines. Summary of the Invention

[0003] The purpose of this invention is to provide a water supply pipeline corrosion acceleration testing device to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides a water supply pipeline corrosion acceleration testing device for conducting corrosion tests on experimental water pipes and local pipe annular surfaces. The device comprises a full-pipe testing module and a local testing module. The full-pipe testing module includes a cavity and a water supply pipe. The cavity has an opening, and water supply pipes are located on both sides. The water supply pipes are connected to the experimental water pipe via reducing joints, and the experimental water pipe is located in the middle of the cavity. The local testing module includes a base plate, a pressurized water pipe, several pressurized pipe bends, and a soil cavity. The pressurized water pipe is welded and fixed to the base plate, and has an opening at its upper part. The pressurized pipe bends press the local pipe annular surface against the opening of the pressurized water pipe, and both ends of the pressurized pipe bends are detachably connected to the base plate via bolts. The soil cavity includes a cavity and pressurized bends, with an opening at the lower part of the cavity. The pressurized bends are located on both sides of the cavity, with through holes at their ends, and are detachably connected to the base plate via bolts.

[0005] Preferably, the water supply pipe includes a fixed water supply pipe, which is welded and fixed to the cavity. This side water supply pipe is connected to the experimental water pipe through a reducing joint. One end of the reducing joint is detachably connected to the fixed water supply pipe through a threaded structure, and the other end is connected to the experimental water pipe. This end is flared and also includes a flexible ring, which is set at the flared end of the reducing joint. The other side water supply pipe is a movable water supply pipe. One end of the movable water supply pipe is connected to the reducing joint through a threaded structure. Two nut discs are set on the outside of the movable water supply pipe, one nut disc is located inside the cavity, and the other is located outside the cavity.

[0006] Preferably, the front side of the cavity is an openable and closable structure, and the top surface of the cavity is an openable and closable structure; a pad and an adjustable base plate are provided at the bottom of the cavity, the pad is provided at the bottom of the cavity, the adjustable base plate is provided on the pad, and the adjustable base plate is inclined to the front side.

[0007] Preferably, at least one central partition is provided inside the cavity, the central partition being perpendicular to the axis of the experimental water pipe. The central partition includes a lower partition and an upper partition. Two sets of opposing limiting protrusions are provided on the side of the cavity and the adjustable bottom plate, with the edges of the lower partition and the upper partition inserted into the limiting protrusions.

[0008] Preferably, a vertical water pipe enclosure and a vertical cavity enclosure are respectively provided at the upper opening of the pressurized water pipe and the lower opening of the cavity. The top of the two sides of the vertical water pipe enclosure and the vertical cavity enclosure parallel to the axial direction of the local pipe annular surface are flat, and the two sides in the vertical direction are arc surfaces. A sealing element is provided between the vertical water pipe enclosure, the vertical cavity enclosure and the local pipe annular surface.

[0009] Preferably, the sealing element includes a surrounding plate connecting part and a connecting part. The surrounding plate connecting part is provided with a surrounding plate groove of the same thickness as the surrounding plate, and a plurality of downwardly inclined sealing fins are provided on the inner side of the surrounding plate groove. The connecting part is located on the side opposite to the surrounding plate groove of the surrounding plate connecting part and includes a plurality of sealing grooves.

[0010] Preferably, the sealing element further includes a sealing connector, which includes a lower part m31 with the same outer contour as the joint and a covering part disposed on both sides of the lower part. The covering part covers the outside of the joint and has a plurality of lower protrusions on the upper surface of the lower part.

[0011] This utility model proposes an accelerated corrosion testing device for water supply pipelines, comprising two experimental modes: a full-pipe testing module and a partial testing module. During the accelerated testing process, pressurized flowing water is placed inside the pipe to simulate normal usage conditions. Simultaneously, simulated soil conditions are set on the outside according to actual usage scenarios. The accelerated corrosion effect is simulated by amplifying certain parameters (temperature, humidity, and concentration), thus completing the accelerated corrosion test for the pipeline. Structurally, the full-pipe testing module allows adjustment of the test chamber size according to the pipe dimensions to reduce the amount of simulated soil used. At least two types of simulated soil can be placed inside the chamber to improve experimental efficiency. The partial testing module uses a pressure-fitting method to connect the water supply pipeline and the pressurized water pipe, facilitating the simulation of actual usage scenarios. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0013] Figure 2 This is an exploded schematic diagram of the full-pipe test module of this utility model.

[0014] Figure 3 This is a schematic diagram of the water pipe connection structure for the explosion test of the full-pipe test module of this utility model.

[0015] Figure 4 This is a schematic diagram of a partial test module of this utility model.

[0016] Figure 5 This is a schematic diagram of a partial test module of this utility model from another angle.

[0017] Figure 6 This is a schematic cross-sectional view of a partial test module of this utility model.

[0018] Figure 7 This is a schematic diagram of the sealing element of the partial test module of this utility model. Detailed Implementation

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

[0020] As attached Figure 1 As shown, the water supply pipeline corrosion acceleration test device involved in this utility model includes a full-pipe test module 1 and a partial test module 2.

[0021] As attached Figure 1 , 2 As shown in Figure 3, the full-pipe test module 1 includes a cavity 10 with an opening and water supply pipes 11 on both sides. The water supply pipes 11 are connected to the experimental water pipe s via reducing couplings. The experimental water pipe s is located in the middle of the cavity, which is filled with simulated soil. The water supply pipes 11 are connected to a water pump and a circulating water pipe (not shown in the figure) to simulate pressurized water flow in the water supply pipes 11 and the experimental water pipe s. The water pump and circulating water pipe are commercially available products, and their specific structures are not protected by this application.

[0022] In one embodiment of this application, the water supply pipe 11 includes a fixed water supply pipe 111, which is welded and fixed to the cavity 10. This side water supply pipe 11 is connected to the experimental water pipe s via a reducing connector 112. One end of the reducing connector 112 is detachably connected to the fixed water supply pipe 111 via a threaded structure. The other end is connected to the experimental water pipe s, and this end is flared. During connection, a flexible ring 113 is placed into the flared end of the reducing connector 112, and then the experimental water pipe s is inserted into the flared end of the reducing connector 112.

[0023] The other water supply pipe is a movable water supply pipe 115. One end of the movable water supply pipe 115 is connected to the reducer 112 by a threaded structure. Two nut discs 114 are provided on the outside of the movable water supply pipe 115. One nut disc 114 is located inside the cavity and the other is located outside the cavity. The side wall of the cavity is clamped by tightening the nut disc 114.

[0024] Furthermore, the front side 101 of the cavity 10 is an openable structure. Specifically, protruding limiting parts 1012 are provided on the left and right sides 102 and the front of the bottom of the front side. After the front side is inserted into the protruding limiting parts 1012, the front side 101 can be fixed after being filled with simulated soil. A handle 1011 is provided on the upper part of the front side 101 for moving the front side 101.

[0025] The top surface 103 of the cavity 10 is an openable and closable structure.

[0026] Furthermore, at least one central partition 104 is provided inside the cavity 1. The central partition 104 is perpendicular to the axis of the experimental water pipe S, dividing the cavity 1 into several spaces. Simulated soil with different formulations can be placed in each space.

[0027] A pad 106 and an adjustable base plate 105 can be installed at the bottom of the cavity 1. The pad, located at the bottom of the cavity 1, can include multiple sets of different heights. The adjustable base plate 105 is mounted on the pad 106 and is tilted towards the front side 101, meaning the side of the pad 106 closest to the front side 101 is lower. The diameter of the water supply pipe varies from 30cm to 60cm. The distance between the bottom of the experimental water pipe and the adjustable base plate 105 can be adjusted to reduce the amount of simulated soil used. The tilted adjustable base plate 105 also facilitates the removal of the soil after the experiment.

[0028] The central partition 104 includes a lower partition 1041 and an upper partition 1042. Two sets of opposing limiting protrusions 1043 are provided on the side of the cavity 1 and the adjustable base plate 105. The edges of the lower partition 1041 and the upper partition 1042 are inserted into the limiting protrusions 1043 for positioning. Semicircular slots are provided on the upper part of the lower partition 1041 and the lower part of the upper partition 1042 for connecting to the experimental water pipe s.

[0029] Soft sealing strips can be provided around the lower partition 1041 and the upper partition 1042 to achieve a relatively tight seal with the limiting protrusion 1043. The top surface 103 presses against the upper partition 1042 to provide sealing pressure.

[0030] As attached Figure 4 , 5As shown in Figure 6, the local test module 2 includes a base plate 21, a pressurized water pipe 22, several pressurized pipe bends 23, and a soil cavity 24. The local test module is used to conduct simulation experiments on a local part of the water supply pipe. The water pipe is cut along the axis, and local pipe annular surfaces s2 with different central angles are obtained according to different water pipe diameters.

[0031] The pressurized water pipe 22 is welded and fixed to the base plate 21. The pressurized water pipe 22 has an opening at the top. The pipe pressing bend 23 presses the local pipe ring surface s2 against the opening of the pressurized water pipe 22. The two ends of the pipe pressing bend 23 are detachably connected to the base plate 21 by bolts.

[0032] The pressurized water pipe 22 is connected to the water pump and the circulating water pipe (not shown in the figure) to simulate pressurized water flow within the pressurized water pipe 22 and the local pipe annular surface s2. The water pump and the circulating water pipe are commercially available products, and their specific structures are not protected by this application.

[0033] The soil cavity 24 includes a cavity body 241 and a pressing bend plate 242. The cavity body 241 has an opening at its lower part. The pressing bend plate 242 is located on both sides of the cavity body 241 and has through holes at its ends. It is detachably connected to the bottom plate 21 by bolts to press the cavity body 241 against the upper part of the local pipe annular surface s2 (the area located above the pressurized water pipe 22).

[0034] Vertical enclosure plates 221 and 2411 are respectively installed at the upper opening of the pressurized water pipe 22 and the lower opening of the cavity 241. The top of the two sides of the vertical enclosure plates 221 and 2411 that are parallel to the axial direction of the local pipe annular surface s2 are flat, and the two sides in the vertical direction are curved.

[0035] A sealing element m is provided between the vertical enclosure plate 221 of the water pipe, the vertical enclosure plate 2411 of the cavity, and the local pipe annular surface s2.

[0036] As attached Figure 7 As shown, the sealing element m includes a surrounding plate connecting part m1 and a connecting part m2. The surrounding plate connecting part is provided with a surrounding plate groove m11 with a thickness equal to or slightly greater than the thickness of the surrounding plate. Several downwardly inclined sealing fins m12 are provided on the inner side of the surrounding plate groove m11. After the surrounding plate is inserted into the surrounding plate groove m11, the sealing fins m12 can be squeezed to achieve a seal between the surrounding plate and the surrounding plate groove m11. The connecting part 2 is located on the side of the surrounding plate connecting part m1 opposite to the surrounding plate groove m11, and includes several sealing grooves m13. In use, the vertical surrounding plate 221 of the water pipe and the vertical surrounding plate 2411 of the cavity are inserted into the surrounding plate groove m11, and the connecting part 2 contacts the side of the local pipe annular surface s2. Under the compression action, the connecting part 2 achieves a good watertight effect.

[0037] The sealing element m is elongated. This application also provides a sealing connector m3 for the sealing element m. The sealing connector m3 includes a lower part m31 with the same outer contour as the joint 2 (including the sealing groove m13) and covering parts m32 disposed on both sides of the lower part m31. The covering parts m32 cover the outer side of the joint 2. In use, the sealing connector m3 is placed at the mating point, and the ends of the sealing elements m on both sides are pressed tightly together against the upper part of the sealing connector m3. To improve the tightness of the press, a number of lower protrusions m33 are provided on the upper surface of the lower part m31.

[0038] During the accelerated testing process, the full-pipe test module 1 and the local test module 2 are selected as needed. After fixing the test water pipe s and the local pipe annular surface s2, pressurized flowing water is set inside the water pipe to simulate normal use. At the same time, simulated soil conditions are set on the outside according to actual use. The accelerated corrosion effect is simulated by expanding certain parameters (temperature, humidity, concentration) to conduct accelerated corrosion experiments on the pipeline.

[0039] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A water supply pipeline corrosion acceleration testing device, used for conducting corrosion tests on experimental water pipes and local pipe ring surfaces, characterized in that, It includes a full-pipe test module and a partial test module; the full-pipe test module includes a cavity and a water supply pipe. The cavity has an opening and water supply pipes are set on both sides. The water supply pipes are connected to the test water pipe through a reducing joint. The test water pipe is located in the middle of the cavity. The local test module includes a base plate, a pressurized water pipe, several pressurized pipe bends, and a soil cavity. The pressurized water pipe is welded and fixed to the base plate, and an opening is provided at the top of the pressurized water pipe. The pressurized pipe bends press the local pipe ring surface tightly against the opening of the pressurized water pipe, and the two ends of the pressurized pipe bends are detachably connected to the base plate by bolts. The soil cavity includes a cavity body and pressurized bends, and an opening is provided at the bottom of the cavity body. The pressurized bends are located on both sides of the cavity body, and through holes are provided at their ends, and they are detachably connected to the base plate by bolts.

2. The water supply pipeline corrosion acceleration testing device according to claim 1, characterized in that, The water supply pipe includes a fixed water supply pipe, which is welded and fixed to the cavity. This side water supply pipe is connected to the experimental water pipe through a reducing joint. One end of the reducing joint is detachably connected to the fixed water supply pipe through a threaded structure, and the other end is connected to the experimental water pipe. This end is flared and also includes a flexible ring, which is set at the flared end of the reducing joint. The other side water supply pipe is a movable water supply pipe. One end of the movable water supply pipe is connected to the reducing joint through a threaded structure. Two nut discs are set on the outside of the movable water supply pipe, one nut disc is located inside the cavity, and the other is located outside the cavity.

3. The water supply pipeline corrosion acceleration testing device according to claim 1, characterized in that, The front side of the cavity is an openable and closable structure, and the top surface of the cavity is an openable and closable structure; a pad and an adjustable base plate are provided at the bottom of the cavity, the pad is located at the bottom of the cavity, and the adjustable base plate is located on the pad, with the adjustable base plate tilted towards the front side.

4. The water supply pipeline corrosion acceleration testing device according to claim 1, characterized in that, At least one central baffle is provided inside the cavity. The central baffle is perpendicular to the axis of the experimental water pipe. The central baffle includes a lower baffle and an upper baffle. Two sets of opposing limiting protrusions are provided on the side of the cavity and the adjustable bottom plate. The edges of the lower baffle and the upper baffle are inserted into the limiting protrusions.

5. The water supply pipeline corrosion acceleration testing device according to claim 1, characterized in that, Vertical water pipe surrounds and vertical cavity surrounds are respectively installed at the upper opening of the pressurized water pipe and the lower opening of the cavity. The top of the two sides of the vertical water pipe surrounds and vertical cavity surrounds that are parallel to the axial direction of the local pipe annular surface are flat, and the two sides in the vertical direction are curved. A sealing element is installed between the vertical water pipe surrounds and vertical cavity surrounds and the local pipe annular surface.

6. The water supply pipeline corrosion acceleration testing device according to claim 5, characterized in that, The sealing element includes a surrounding plate connecting part and a joint part. The surrounding plate connecting part is provided with a surrounding plate groove of the same thickness as the surrounding plate. Several downwardly inclined sealing fins are provided on the inner side of the surrounding plate groove. The joint part is located on the side opposite to the surrounding plate groove of the surrounding plate connecting part and includes several sealing grooves.

7. The water supply pipeline corrosion acceleration testing device according to claim 5, characterized in that, The sealing element also includes a sealing connector, which includes a lower part (m31) with the same outer contour as the joint and a covering part disposed on both sides of the lower part. The covering part covers the outside of the joint and has a plurality of lower protrusions on the upper surface of the lower part.

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