Accelerated aging test system for high-density polyethylene buried pipeline

Abstract

The utility model discloses an accelerated aging test system for a high-density polyethylene buried pipeline, which comprises a box body in which a test chamber for an aging test is arranged; a plurality of buried pipeline test pieces are arranged in the test chamber in a drawable manner through the test piece dismounting and mounting system; the in-pipe pressurization system is used for carrying out gas pressurization on the plurality of buried pipeline test pieces; the water bath system is used for injecting water into the test chamber to provide a water bath environment; the high-temperature system is used for heating the environment temperature in the test chamber or is matched with the water bath system to provide water bath environments with different temperatures for the plurality of buried pipeline test pieces; the ultraviolet irradiation system is used for performing ultraviolet irradiation on the plurality of buried pipeline test pieces; and the in-pipe pressurization system, the water bath system and the high-temperature system are all connected with the control system. The device can truly and rapidly simulate the coupling conditions of various aging factors during the real service of the buried pipeline, can provide effective reference basis for the safe operation and construction design of the high-density polyethylene buried pipeline, and has great advantages.

Description

Technical Field

[0001] The utility model relates to the technical field of polyethylene pipeline aging, in particular to an accelerated aging test system for high-density polyethylene buried pipelines. Background Art

[0002] With the continuous development of urban infrastructure, urban pipeline networks, as a vital component of urban operations, undertake key functions such as resource allocation, environmental protection, and social services. They are essential infrastructure and the "lifeline" that ensures urban operations. In the context of promoting a resource-conserving and environmentally friendly society, high-density polyethylene (HDPE) pipes are widely used in municipal drainage, gas transmission, and other fields due to their excellent corrosion resistance, low-temperature impact resistance, and stress cracking resistance.

[0003] However, over the long term, high-density polyethylene (HDPE) pipelines are subject to numerous factors, including light, temperature, pressure, external loads, and corrosion from chemicals and microorganisms in the soil. These factors often lead to degradation of the pipeline material, accelerating the aging process and reducing the pipeline's service life. Existing accelerated pipeline aging systems can only simulate one or two aging factors and are unable to accurately and rapidly simulate the coupling of various aging factors experienced during actual service life in buried pipelines. Therefore, an accelerated aging testing system for HDPE buried pipelines is urgently needed to provide a reference for the safe operation and construction design of HDPE buried pipelines. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an accelerated aging test system for high-density polyethylene buried pipelines.

[0005] The utility model discloses an accelerated aging test system for high-density polyethylene buried pipelines, comprising:

[0006] a box body, which contains a test chamber for aging test;

[0007] A test piece disassembly and assembly system, through which multiple buried pipeline test pieces can be drawn out and placed in the test chamber;

[0008] an in-pipe pressurization system for performing gas pressurization on the plurality of buried pipeline test pieces;

[0009] a water bath system, which is used to inject water into the test chamber to provide a water bath environment;

[0010] A high temperature system, which is used to heat the ambient temperature in the test chamber or cooperate with the water bath system to provide a water bath environment of different temperatures for the buried pipeline specimen;

[0011] an ultraviolet irradiation system, which is used to irradiate the plurality of buried pipeline test pieces with ultraviolet light;

[0012] The control system, the in-pipe pressurization system, the water bath system and the high-temperature system are all connected to the control system.

[0013] As a further improvement of the present invention, a pulley is provided at the bottom of the box; the test chamber is provided at the lower left side of the front of the box, and a first chamber is provided at the upper left side of the front of the box. The first chamber is divided into an upper and a lower chamber by an inner partition, the in-tube pressurization system is placed in the upper chamber, and the water bath system is placed in the lower chamber; the control system is installed at the upper right side of the front of the box, and a second chamber is provided at the lower right side of the front of the box;

[0014] A left door is hinged on the front side of the test chamber, an upper door is hinged on the front side of the first chamber, and a right door is hinged on the front side of the second chamber; the inner sides of the left door, the right door and the upper door are all provided with sealing strips; the left door, the right door and the upper door are all equipped with door locks.

[0015] As a further improvement of the present invention, the test piece disassembly and assembly system includes a slide rail box, an annular test piece base and an annular hollow chamber;

[0016] The bottom of the slide rail box is slidably mounted on the bottom of the test chamber via a first slide rail assembly, the annular specimen base is mounted on the top of the slide rail box, and a handle is provided on the front of the slide rail box;

[0017] The annular hollow chamber is coaxially arranged with the annular specimen base, and its top is slidably mounted on the top of the test chamber through a second slide rail assembly. A plurality of pressure tubes are arranged around its bottom, and their interiors are connected to the pressure system in the pipe; the top ends of the plurality of buried pipeline specimens are respectively mounted on the corresponding pressure tubes through rubber seats, and the bottom ends of the plurality of buried pipeline specimens are respectively inserted into the corresponding mounting holes of the annular specimen base through rubber seats.

[0018] As a further improvement of the present invention, the in-tube pressurization system includes an air pump, which is installed in the upper chamber. An air intake is provided on the top of the box body corresponding to the air inlet of the air pump. The air outlet of the air pump is connected to the annular hollow chamber through a first rubber tube; a pressure gauge is installed on the first rubber tube; and the air pump is connected to the control system.

[0019] As a further improvement of the present invention, the ultraviolet irradiation system includes an ultraviolet lamp and an ultraviolet lamp holder; the bottom end of the ultraviolet lamp holder is fixedly mounted on the annular specimen base and is located at the center of the annular specimen base; the ultraviolet lamp is mounted on the ultraviolet lamp holder so as to be liftable in a vertical direction through a lifting rod.

[0020] As a further improvement of the present invention, the outer cover of the UV ray detector is provided with a glass cover.

[0021] As a further improvement of the present invention, the water bath system includes a first water pump, which is installed in the lower chamber. The water outlet of the first water pump is connected to the test chamber through a second rubber tube, and a water level sensor is installed in the test chamber; the first water pump and the water level sensor are both connected to the control system.

[0022] As a further improvement of the present invention, the high-temperature system includes a heating plate, at least one of which is fixedly mounted on the side wall of the test chamber; a temperature sensor is installed in the test chamber; and both the heating plate and the temperature sensor are connected to the control system.

[0023] As a further improvement of the present invention, it further comprises a drainage system, wherein the drainage system comprises a second water pump, a filter layer and a water pumping tank;

[0024] The second chamber is divided into an upper mounting chamber, a middle mounting chamber and a lower mounting chamber by multiple inner partitions. The side of the test chamber close to the lower mounting chamber is connected to the water pumping trough through a water pumping port, and the outlet end of the water pumping trough is connected to the middle mounting chamber. The filter layer is installed in the middle mounting chamber, and the filter layer is arranged parallel to the inner partition. The second water pump is installed in the upper mounting chamber, the water inlet of the second water pump is connected to the middle mounting chamber, and the water outlet of the second water pump is connected to the side water outlet of the upper mounting chamber.

[0025] As a further improvement of the present invention, the filter layer includes an activated carbon filter plate and an iron mesh filter plate arranged vertically up and down, and the upper and lower activated carbon filter plates and the iron mesh filter plates are arranged in parallel and spaced apart.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] The utility model integrates the in-pipe pressurization system, water bath system, high-temperature system, and ultraviolet irradiation system, and can select one or more aging factors for testing according to test requirements. Compared with the existing aging systems on the market that test single or two aging factors, the utility model can truly and quickly simulate the coupling of various aging factors when the buried pipeline is actually in service, and can provide an effective reference basis for the safe operation and construction design of high-density polyethylene buried pipelines, which has great advantages.

[0028] The utility model can realize the rapid installation and disassembly of multiple buried pipeline test pieces by setting up a test piece disassembly and assembly system, and can realize the pulling and drawing of multiple buried pipeline test pieces inside the test chamber through the test piece disassembly and assembly system, which is convenient for operators to install and replace the buried pipeline test pieces.

[0029] The test object in the present invention is a section of a real buried pipeline. Compared with the test object of the existing aging test system, it is exactly the same as the actual service object. At the same time, different types of rubber seats can be selected according to the required pipeline diameter, which has a wide applicability.

[0030] The utility model is provided with a drainage system, so that the waste water after the test can be discharged from the box after passing through two layers of filtration, without causing pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of an accelerated aging test system for high-density polyethylene buried pipelines disclosed in one embodiment of the present utility model;

[0032] Figure 2 This is a structural schematic diagram of an annular specimen base and an annular hollow chamber of an accelerated aging test system for high-density polyethylene buried pipelines disclosed in one embodiment of the utility model;

[0033] Figure 3 This is a structural schematic diagram of a slide rail box of an accelerated aging test system for high-density polyethylene buried pipelines disclosed in one embodiment of the utility model;

[0034] Figure 4 This is a schematic structural diagram of an ultraviolet irradiation system of an accelerated aging test system for high-density polyethylene buried pipelines disclosed in one embodiment of the utility model;

[0035] Figure 5 The present invention is a flowchart of an accelerated aging test system for high-density polyethylene buried pipelines disclosed in one embodiment of the present invention.

[0036] In the picture:

[0037] 1. Box body; 2. Ventilation port; 3. Control panel; 4. Pressure gauge; 5. First rubber hose; 6. Air pump; 7. Air inlet; 8. Second rubber hose; 9. First water pump; 10. First hinge; 11. Upper door; 12. Left door; 13. Heating plate; 14. Second hinge; 15. Slide rail base; 16. Pulley; 17. Specimen disassembly and assembly system; 18. Water inlet; 19. Water trough; 20. Right door; 21. Buckle; 22. Iron Mesh filter plate; 23. Activated carbon filter plate; 24. Second water pump; 25. Lifting knob; 26. UV lamp holder; 27. Lifting rod; 28. UV lamp; 29. ​​Second upper slide rail; 30. Second lower slide rail; 31. Annular hollow chamber; 32. UV irradiation component; 33. Annular specimen base; 34. Rubber seat; 35. Buried pipe specimen; 36. Pressurized pipe; 37. Handle; 38. Slide rail box; 39. First upper slide rail; 40. First lower slide rail. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0041] The present invention is described in further detail below with reference to the accompanying drawings:

[0042] like Figure 1 As shown, according to the utility model, an accelerated aging test system for a high-density polyethylene buried pipeline is provided, which includes a box body 1, a specimen disassembly and assembly system 17, an in-pipe pressurizing system, a water bath system, a high-temperature system, an ultraviolet irradiation system and a control system, wherein a test chamber for aging test is provided in the box body 1; a plurality of buried pipeline specimens 35 can be drawn out and placed in the test chamber through the specimen disassembly and assembly system 17; the in-pipe pressurizing system is used to perform gas pressurization for the plurality of buried pipeline specimens 35; the water bath system is used to inject water into the test chamber to provide a water bath environment; the high-temperature system is used to heat the ambient temperature in the test chamber or cooperate with the water bath system to provide a water bath environment of different temperatures for the buried pipeline specimens; the ultraviolet irradiation system is used to perform ultraviolet light irradiation for the plurality of buried pipeline specimens 35; the in-pipe pressurizing system, the water bath system and the high-temperature system are all connected to the control system.

[0043] In this embodiment, by integrating the in-pipe pressurization system, water bath system, high-temperature system, and ultraviolet irradiation system, one or more aging factors can be selected for testing according to the test requirements. Compared with the existing aging systems with single or two aging factors on the market, it can truly and quickly simulate the coupling of various aging factors when the buried pipeline is actually in service, and can provide an effective reference basis for the safe operation and construction design of high-density polyethylene buried pipelines, which has great advantages.

[0044] Specifically:

[0045] like Figure 1 As shown, in the above embodiment, preferably, a pulley 16 is provided at the bottom of the box body 1 near its four corners. The setting of the pulley 16 can realize the movement of the box body 1; a test chamber is provided at the lower left side of the front of the box body 1, and a first chamber is provided at the upper left side of the front of the box body 1. The first chamber is divided into an upper and a lower chamber by an inner partition. The in-tube pressurization system is placed in the upper chamber, and the water bath system is placed in the lower chamber; a control system is installed at the upper right side of the front of the box body 1, and a second chamber is provided at the lower right side of the front of the box body 1; a left door 12 is hinged on one side of the front of the test chamber, an upper door 11 is hinged on one side of the front of the first chamber, and a right door 20 is hinged on one side of the front of the second chamber. In this embodiment, the test chamber and the second chamber are arranged side by side, and the height of the two boxes is the same. In this embodiment, the upper door 11 is rotatably connected to one side of the first chamber by a plurality of first hinges 10; the left door 12 is rotatably connected to one side of the test chamber by a plurality of second hinges 14.

[0046] In the above embodiment, preferably, in order to ensure that the test chamber, the first chamber and the second chamber are in a sealed state after the corresponding left door 12, the upper door 11 and the right door 20 are closed, in this embodiment, sealing strips are provided on the inner sides of the left door 12, the right door 20 and the upper door 11, and door locks are provided on the left door 12, the right door 20 and the upper door 11 to ensure that the left door 12, the right door 20 and the upper door 11 can be closed in place and locked with the box body 1.

[0047] In the above embodiment, preferably, the door lock may include a flat lock or a locking hasp; when a flat lock is selected, multiple flat locks are respectively installed on the free ends of the left door 12, the right door 20 and the upper door 11, and holes and grooves matching them are opened on the box body; when a locking hasp is selected, the hasp parts of multiple locking hasps can be respectively installed on the remaining three sides of the left door 12, the right door 20 and the upper door 11 except the hinged side, and the hasp parts of the box body 1 corresponding to the left door 12, the right door 20 and the upper door 11 are respectively provided with hook parts. When the corresponding door is closed in place, the corresponding hasp part is buckled on the corresponding hook part, so that each door and the box body 1 are closed in place, and it is ensured that the interior of the test chamber, the first chamber and the second chamber are in a sealed state.

[0048] In the above embodiment, preferably, in order to facilitate the observation of the progress of the aging test inside the test chamber, a transparent glass window is opened in the middle of the left door 12 in this embodiment, and a sealing strip is affixed around the transparent glass window. The operator can observe the reaction conditions inside through the transparent glass window.

[0049] In the above embodiment, preferably, the interior of the test chamber and its internal components are waterproof and sealed, and the test chamber is also provided with a heat insulation layer to prevent high temperature from affecting the components and circuits inside the wall.

[0050] like Figure 2-3 As shown, in the above embodiment, preferably, the specimen disassembly and assembly system 17 includes a slide rail box 38, an annular specimen base 33 and an annular hollow chamber 31; wherein, the bottom of the slide rail box 38 is slidably mounted on the bottom of the test chamber through a first slide rail assembly; the top of the slide rail box 38 is installed with an annular specimen base 33, and the front of the slide rail box 38 is provided with a handle 37; in this embodiment, the slide rail box 38, the first slide rail assembly, and the handle 37 together constitute the slide rail base component 15.

[0051] In the above embodiment, preferably, the first slide rail assembly includes a first upper slide rail 39 and a first lower slide rail 40, wherein the two first upper slide rails 39 are respectively arranged on both sides of the bottom of the slide rail box 38 along the withdrawal direction of the specimen disassembly and assembly system 17, and the two first lower slide rails 40 are respectively fixedly installed on the bottom plate of the test chamber corresponding to the positions of the two first upper slide rails 39.

[0052] In the above embodiment, preferably, the annular hollow chamber 31 and the annular specimen base 33 are coaxially arranged up and down; a connecting plate is provided on the top of the annular hollow chamber 31, and the upper part of the connecting plate can be slidably installed on the top of the test chamber through a second slide rail assembly; a plurality of pressure tubes are arranged around the bottom of the annular hollow chamber 31, each of which is connected to the annular hollow chamber 31, and the interior of the annular hollow chamber 31 is connected to the pressurized system in the pipe; the top ends of the plurality of buried pipeline specimens 35 are respectively mounted on the corresponding pressure tubes through rubber seats 34, and the bottom ends of the plurality of buried pipeline specimens 35 are respectively inserted into the corresponding mounting holes of the annular specimen base 33 through the rubber seats 34. In this embodiment, the top of the annular specimen base 33 is evenly distributed with a plurality of mounting holes along its circumference.

[0053] In the above embodiment, preferably, the rubber seats 34 at the bottom ends of the plurality of buried pipeline test pieces 35 are interference fit with the corresponding mounting holes of the annular test piece base 33 .

[0054] In the above embodiment, preferably, a turntable is installed in the mounting hole at the bottom end of the annular specimen base 33 corresponding to each buried pipeline specimen 35, and the multiple turntables are connected by belt transmission and connected to the drive motor. The multiple turntables can drive the corresponding buried pipeline specimens 35 to rotate under the drive motor, so that each buried pipeline specimen 35 can be evenly irradiated by the ultraviolet irradiation system.

[0055] In the above embodiment, preferably, the second slide rail assembly includes a second upper slide rail 29 and a second lower slide rail 30, wherein the two second upper slide rails 29 are respectively fixedly installed on the top plate of the test chamber along the withdrawal direction of the specimen disassembly and assembly system 17, and the two second lower slide rails 30 respectively correspond to the positions of the two second upper slide rails 29 at the top of the connecting plate.

[0056] In this embodiment, the test object is a section of a real buried pipeline, which is exactly the same as the actual service object compared to the test object of the existing aging test system; at the same time, different models of rubber seats 34 can be selected according to the required pipeline diameter, which has wide applicability.

[0057] like Figure 1 As shown, the in-pipe pressurization system includes an air pump 6, a first rubber tube 5 and a pressure gauge 4, wherein the air pump 6 is fixedly installed in the upper chamber, and an air intake port 7 is provided at the top of the box body 1 corresponding to the air inlet position of the air pump 6. The air inlet of the air pump 6 is connected to the air intake port 7, and the air outlet of the air pump 6 is placed in the test chamber through the first rubber tube 5 through the inner partition and the bottom plate inside the first chamber, and is connected to the annular hollow chamber 31. A pressure gauge 4 is installed on the first rubber tube 5; in this embodiment, the air pump 6 is connected to the control system, and equal intensity air pressure can be applied to the inside of each buried pipeline test piece 35 through the air pump 6.

[0058] In the above embodiment, preferably, the water bath system includes a first water pump 9, a second rubber tube 8 and a water level sensor, wherein the first water pump 9 is fixedly installed in the lower chamber, and the water outlet of the first water pump 9 passes through the inner partition and the bottom plate inside the first chamber through the second rubber tube 8 and is placed in the test chamber; the water level sensor is installed in the test chamber to monitor the water level of the water bath in the test chamber; in this embodiment, the first water pump 9 and the water level sensor are both connected to the control system.

[0059] In the above embodiment, the high-temperature system preferably includes a heating plate 13, with at least one heating plate 13 fixedly mounted on the side wall of the test chamber; a temperature sensor is installed within the test chamber; and both the heating plate 13 and the temperature sensor are connected to a control system. In this embodiment, when water is not injected through the water bath system, the heating plate 13 can be used to perform thermal oxygen accelerated aging tests. When water is injected into the test chamber containing the buried pipeline specimen 35 using the water bath system, water bath accelerated aging tests at different temperatures can be performed.

[0060] like Figure 4 As shown, in the above embodiment, preferably, the ultraviolet irradiation system includes an ultraviolet lamp holder 26, a lifting rod 27, and an ultraviolet lamp 28, wherein the bottom of the ultraviolet lamp holder 26 is fixedly mounted on the annular specimen base 33 through a disc portion, and is located at the center of the annular specimen base 33, the lifting rod 27 is coaxially arranged with the ultraviolet lamp holder 26, and is installed on the ultraviolet lamp holder 26 in a vertical direction, and the ultraviolet lamp 28 is fixedly mounted on the upper end of the lifting rod 27 by bolts.

[0061] In the above embodiment, preferably, a plurality of adjustment holes are provided on the side of the lifting rod 27 in the vertical direction, and a through hole is provided on the side of the ultraviolet lamp holder 26 to cooperate with the adjustment hole. The lifting knob passes through the through hole and is connected to any one of the adjustment holes to adjust the height of the lifting rod 27.

[0062] In the above embodiment, preferably, the outer cover of the ultraviolet lamp 28 is provided with a glass cover to isolate the aqueous solution during the water bath test and avoid damage to the ultraviolet lamp 28.

[0063] In the above embodiment, preferably, a drainage system is also included, which includes a second water pump 24, a filter layer and a water pumping trough 19; wherein, the second chamber is divided into an upper mounting chamber, a middle mounting chamber and a lower mounting chamber by multiple inner partitions, and the side of the test chamber close to the lower mounting chamber is connected to the water pumping trough 19 through a water pumping port 18, and the outlet end of the water pumping trough 19 is connected to the middle mounting chamber, and a filter layer is installed in the middle mounting chamber, and the filter layer is arranged parallel to the inner partition, the second water pump 24 is installed in the upper mounting chamber, the water inlet of the second water pump 24 is connected to the middle mounting chamber, and the water outlet of the second water pump 24 is connected to the side water outlet of the upper mounting chamber.

[0064] In the above embodiment, the filter layer preferably includes an activated carbon filter plate 23 and an iron mesh filter plate 22 arranged vertically in the upper and lower directions, with the upper and lower activated carbon filter plates 23 and iron mesh filter plates 22 arranged parallel to each other and spaced apart. In this embodiment, the iron mesh filter plate 22 can be a No. 260 iron mesh filter plate, with a wire diameter of 0.125 x 0.09 mm in both horizontal and vertical directions, and a particle size parameter of 36 microns; the activated carbon filter plate 23 is a honeycomb activated carbon filter plate with a pore size of 1.5 mm.

[0065] In the above embodiment, preferably, the two layers of clips 21 are fixed on both sides of the middle installation cavity by bolts, the iron mesh filter plate 22 is placed above the lower layer of clips 21, and the activated carbon filter plate 23 is placed above the upper layer of clips 21.

[0066] In the above embodiment, preferably, after the right door 20 is closed, the middle installation cavity can form a vacuum environment under the action of the second water pump 24.

[0067] In the above embodiment, the control system preferably includes a control panel 3 and an electronic control assembly. In this embodiment, the control panel 3 is mounted on the upper right side of the front of the housing 1. The upper right side of the front of the housing 1 houses an electronic control assembly electrically connected to the control panel 3. A vent 2 is provided on the side of the housing 1 corresponding to the location of the chamber where the electronic control assembly is located. The electronic control assembly in this embodiment includes a controller and supporting circuits. The temperature sensor, water level sensor, air pump 6, first water pump 9, second water pump 24, and ultraviolet lamp 28 are respectively connected to the control panel 3 via the electronic control assembly, allowing the operator to control and monitor the operation of each system through the control panel 3.

[0068] In the above embodiment, preferably, the control panel 3 integrates a display, indicator lights, alarm lights, switches, command buttons and a circuit board.

[0069] like Figure 5 As shown, according to the utility model, an accelerated aging test method for a high-density polyethylene buried pipeline is provided, which is applied to the above-mentioned accelerated aging test system, comprising:

[0070] Installing the buried pipeline test pieces 35: Installing multiple buried pipeline test pieces 35 in the test chamber using the test piece assembly and disassembly system, and ensuring that the left door 12 of the test chamber is closed, so that the interior of the test chamber is in a sealed state;

[0071] Specifically, the left door 12 is opened, and the operator pulls the handle 37 on the front of the slide rail box to pull the specimen disassembly and assembly system out of the test chamber, installs rubber seats 34 on both ends of multiple buried pipe specimens 35, and installs multiple buried pipe specimens 35 on the annular specimen base 33, and inserts the pressure tube 36 at the bottom of the annular hollow chamber 31 into the corresponding rubber seats 34 at the upper ends of multiple buried pipe specimens 35, and then returns the multiple buried pipe specimens 35 to the test chamber through the first slide rail assembly and the second slide rail assembly in the specimen disassembly and assembly system, and closes the left door 12 of the test chamber and locks the door to make the interior of the test chamber in a sealed state.

[0072] Conduct aging test: Based on the test requirements, conduct one or more of the following tests: in-pipe pressure test, water bath test, thermal oxygen accelerated aging test and ultraviolet accelerated aging test through the in-pipe pressurization system, water bath system, high temperature system and ultraviolet irradiation system;

[0073] Specifically,

[0074] In-pipe pressure testing, including:

[0075] The air pump 6 draws air in through the air inlet 7 and pressurizes the air into the annular hollow chamber 31 through the first rubber tube 5;

[0076] The annular hollow chamber 31 applies equal-strength air pressure to the interior of each buried pipeline test piece 35 through multiple pressurized pipes 36 at its bottom. The operator can read the current pressure through the pressure gauge 4 on the first rubber tube 5 and maintain the pressure to complete the pressure test inside the pipe.

[0077] Water bath accelerated aging tests, including:

[0078] The first water pump 9 draws water from outside the box 1 and pours the water into the test chamber where the buried pipeline specimen 35 is located through the second rubber tube 8;

[0079] The water level sensor in the test chamber is used to monitor whether the current water level meets the test requirements;

[0080] If the conditions are met, the first water pump 9 is shut down by the control system; in conjunction with the heating plate 13 of the high temperature system, accelerated aging tests can be performed in water baths at different temperatures;

[0081] Thermal oxygen accelerated aging tests, including:

[0082] When the water bath test is not performed, the heating plate 13 is turned on to heat the ambient temperature in the test chamber to perform the thermal oxygen accelerated aging test.

[0083] UV accelerated aging tests, including:

[0084] The height of the UV lamp 28 is adjusted by the lifting knob 25 in conjunction with the lifting rod 27;

[0085] The ultraviolet lamp 28 is turned on to uniformly irradiate the buried pipeline specimen 35 in the test chamber with ultraviolet light.

[0086] End of test: After the test is completed, shut down each system through the control system and open the drainage system to drain the aqueous solution in the test chamber;

[0087] Specifically,

[0088] The control system shuts down the in-pipe pressurization system, water bath system, high temperature system and ultraviolet irradiation system;

[0089] The second water pump 24 is turned on. When the right door 20 is closed, the installation cavity where the filter layer is located is close to a vacuum cavity under the action of the second water pump 24. The aqueous solution in the test chamber is sucked into the water inlet 18 and the water trough 19; and is filtered through the iron mesh filter plate 22 and the activated carbon filter plate 23 and discharged to the outside of the box.

[0090] Taking out the test piece: After opening the left door 12 of the test chamber, the buried pipeline test piece 35 is taken out through the test piece disassembly and assembly system.

[0091] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An accelerated aging test system for high-density polyethylene buried pipelines, characterized in that: include: a box body, which contains a test chamber for aging test; A test piece disassembly and assembly system, through which multiple buried pipeline test pieces can be drawn out and placed in the test chamber; an in-pipe pressurization system for performing gas pressurization on the plurality of buried pipeline test pieces; a water bath system, which is used to inject water into the test chamber to provide a water bath environment; A high temperature system, which is used to heat the ambient temperature in the test chamber or cooperate with the water bath system to provide a water bath environment of different temperatures for the buried pipeline specimen; an ultraviolet irradiation system, which is used to irradiate the plurality of buried pipeline test pieces with ultraviolet light; The control system, the in-pipe pressurization system, the water bath system and the high-temperature system are all connected to the control system.

2. The accelerated aging test system according to claim 1, characterized in that: A pulley is provided at the bottom of the box; the test chamber is provided at the lower left side of the front of the box, and a first chamber is provided at the upper left side of the front of the box. The first chamber is divided into an upper and a lower chamber by an inner partition, the in-tube pressurization system is placed in the upper chamber, and the water bath system is placed in the lower chamber; the control system is installed at the upper right side of the front of the box, and a second chamber is provided at the lower right side of the front of the box; A left door is hinged on the front side of the test chamber, an upper door is hinged on the front side of the first chamber, and a right door is hinged on the front side of the second chamber; the inner sides of the left door, the right door and the upper door are all provided with sealing strips; the left door, the right door and the upper door are all equipped with door locks.

3. The accelerated aging test system according to claim 2, wherein: The test piece disassembly and assembly system includes a slide rail box, an annular test piece base and an annular hollow chamber; The bottom of the slide rail box is slidably mounted on the bottom of the test chamber via a first slide rail assembly, the annular specimen base is mounted on the top of the slide rail box, and a handle is provided on the front of the slide rail box; The annular hollow chamber is coaxially arranged with the annular specimen base, and its top is slidably mounted on the top of the test chamber through a second slide rail assembly. A plurality of pressure tubes are arranged around its bottom, and their interiors are connected to the pressure system in the pipe; the top ends of the plurality of buried pipeline specimens are respectively mounted on the corresponding pressure tubes through rubber seats, and the bottom ends of the plurality of buried pipeline specimens are respectively inserted into the corresponding mounting holes of the annular specimen base through rubber seats.

4. The accelerated aging test system according to claim 3, characterized in that: The in-pipe pressurization system includes an air pump, which is installed in the upper chamber. An air intake is provided on the top of the box body corresponding to the air inlet of the air pump. The air outlet of the air pump is connected to the annular hollow chamber through a first rubber tube; a pressure gauge is installed on the first rubber tube; and the air pump is connected to the control system.

5. The accelerated aging test system according to claim 3, wherein: The ultraviolet irradiation system includes an ultraviolet lamp and an ultraviolet lamp holder; the bottom end of the ultraviolet lamp holder is fixedly installed on the annular specimen base and is located at the center of the annular specimen base; the ultraviolet lamp is installed on the ultraviolet lamp holder in a vertical direction through a lifting rod.

6. The accelerated aging test system according to claim 5, characterized in that: The outer cover of the ultraviolet ray detector is provided with a glass cover.

7. The accelerated aging test system according to claim 2, wherein: The water bath system includes a first water pump, which is installed in the lower chamber. The water outlet of the first water pump is connected to the test chamber through a second rubber tube. A water level sensor is installed in the test chamber. The first water pump and the water level sensor are both connected to the control system.

8. The accelerated aging test system according to claim 2, wherein: The high-temperature system includes a heating plate, at least one of which is fixedly mounted on a side wall of the test chamber; a temperature sensor is installed in the test chamber; and both the heating plate and the temperature sensor are connected to the control system.

9. The accelerated aging test system according to claim 2, wherein: It also includes a drainage system, which includes a second water pump, a filter layer and a water pumping tank; The second chamber is divided into an upper mounting chamber, a middle mounting chamber and a lower mounting chamber by a plurality of inner partitions. The side of the test chamber close to the lower mounting chamber is connected to the water pumping trough through a water pumping port, and the outlet end of the water pumping trough is connected to the middle mounting chamber. The filter layer is installed in the middle mounting chamber, and the filter layer is arranged parallel to the inner partition. The second water pump is installed in the upper mounting chamber, the water inlet of the second water pump is connected to the middle mounting chamber, and the water outlet of the second water pump is connected to the side water outlet of the upper mounting chamber.

10. The accelerated aging test system according to claim 9, characterized in that: The filter layer comprises an activated carbon filter plate and an iron mesh filter plate arranged vertically up and down, and the upper and lower activated carbon filter plates and the iron mesh filter plates are arranged in parallel and at intervals.

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