A test device for a membrane metal sheet roof siphon drainage system

Abstract

The present application relates to a kind of test device of membrane metal plate roofing siphon drainage system, comprising: two sides membrane metal plate unit;Gutter unit, gutter unit is arranged between two sides membrane metal plate unit, and it is located below two sides membrane metal plate unit, for testing at least one of its sealing performance, convergence time under different drainage slopes;Siphon unit, for draining water in gutter unit;Simulation rainfall unit;Test unit, for testing at least one of siphon pressure and drainage performance of siphon unit.The test device can be used for the sealing of system, convergence time under different slopes, drainage condition test, drainage condition test of different gutters etc., provide data support when actual construction of system, in order to expect that the size of gutter and the deepening design of siphon drainage system can match, avoid many problems existing in later period, such as poor drainage effect, water seepage etc.

Description

Technical Field

[0001] This invention belongs to the technical field of roof siphon drainage systems, specifically relating to a testing device for a membrane metal roof siphon drainage system. Background Technology

[0002] Traditional roof gutters have poor sealing between themselves and the roof tiles or steel plates. If the drain outlets of the rainwater drainage system become clogged or the municipal storm drain overflows, the water level in the gutters will gradually rise and may overflow into the room along the gaps between the gutters and the roof panels, damaging indoor facilities. Integrated tile roofing systems, using a fully welded process, offer excellent sealing and durability, meeting the latest waterproofing requirements for steel roofs in GB55030-2022. However, there is insufficient technical coordination between existing gutter installation companies and siphonic rainwater drainage system companies. Specifically, the size of the drainage gutter has not been verified against the gutter capacity, leading to a mismatch between the dimensions and the detailed design of the siphonic rainwater drainage system, causing numerous problems later on.

[0003] Currently, there is no testing device capable of testing the compatibility between the detailed design of a siphonic drainage system for a membrane metal roof and the dimensions of the gutter. Summary of the Invention

[0004] The technical problem actually solved by this invention is to address the shortcomings of the existing technology by providing a testing device for a siphon drainage system for a membrane metal roof, which solves the problem of mismatch between the gutter size and the siphon drainage system and avoids many problems in the later stages.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A test apparatus for a membrane-coated metal roof siphon drainage system includes:

[0007] A coated metal plate unit is provided on both sides of the testing device. Each coated metal plate unit extends obliquely in the horizontal direction and the tilt angle is adjustable.

[0008] The gutter unit is disposed between the two membrane metal plate units on both sides and located below the two membrane metal plate units on both sides, so that water on the two membrane metal plate units on both sides can be drained into the gutter unit. The gutter unit is used to test at least one of its sealing performance and the flow time under different drainage slopes.

[0009] A siphon unit, which is connected to the gutter unit, is used to drain water from the gutter unit;

[0010] A simulated rainfall unit, which is used to generate different operating conditions required for the experiment;

[0011] The test unit includes at least one of a pressure testing mechanism and a flow testing mechanism for testing at least one of the siphon pressure and drainage performance of the siphon unit.

[0012] In some embodiments, the gutter in the gutter unit is replaceable to test operating conditions under different gutter volumes and different gutter cross sections. The operating conditions under different gutter volumes and different gutter cross sections include at least one of the gutter unit's sealing performance, confluence time under different drainage slopes, siphon pressure, and drainage performance.

[0013] Both the depth and width of the gutter can be manually adjusted.

[0014] In some embodiments, the gutter unit includes a gutter, a polymer waterproof membrane covering the gutter, and first covering sheets respectively disposed on both sides of the testing device. The polymer waterproof membrane extends from both sides of the gutter and covers the two sides of the coated metal plate unit. The two sides of the polymer waterproof membrane are welded to the two sides of the coated metal plate unit.

[0015] One side of the first covering sheet on each side is welded to the corresponding side of the film-coated metal plate unit, and the other side is welded to the polymer waterproof membrane.

[0016] In some specific embodiments, the testing device further includes a bracket and a platform disposed on the bracket, and the gutter unit further includes a fastening component that passes through the polymer waterproof membrane and the gutter in sequence and is used to fix the polymer waterproof membrane and the gutter on the platform, and a second cover plate covering the fastening component, the second cover plate being hot-air welded to the polymer waterproof membrane.

[0017] Furthermore, the first and second covering sheets are selected based on the material of the polymer waterproof membrane, and can be chosen according to the actual test conditions. Typically, the first and second covering sheets are made of the same material as the polymer waterproof membrane. For example, if the polymer waterproof membrane is a polyolefin waterproof membrane, then the first and second covering sheets are made of polyolefin; if the polymer waterproof membrane is a polyvinyl chloride (PVC) waterproof membrane, then the first and second covering sheets are made of PVC.

[0018] In some embodiments, the siphon unit includes a siphon rainwater hopper disposed on the gutter unit and a siphon drain pipe communicating with the siphon rainwater hopper; the pressure testing mechanism includes a pressure sensor disposed inside the siphon drain pipe; and the flow testing mechanism includes a flow meter for detecting the outflow of water from the siphon drain pipe.

[0019] In some specific embodiments, the siphon rainwater hopper and the siphon drainage pipe are replaceable. The size and specifications of the siphon rainwater hopper are replaceable, as are the material, size, and specifications of the siphon drainage pipe. When replacing the siphon rainwater hopper and the siphon drainage pipe, the diameter of the siphon drainage pipe must match that of the siphon rainwater hopper.

[0020] The siphon unit comprises transparent pipes and fittings of different diameters, which are fixed to the load-bearing structure of the device by fasteners, making it convenient for experimental personnel to observe the dynamic process of siphon formation, and can also be displayed to other observers.

[0021] The pressure testing mechanism tests the siphon pressure and drainage volume of different siphon rainwater buckets and / or different siphon drainage pipes by replacing them.

[0022] The flow meter of the flow testing mechanism is installed at the outlet of the siphon drain pipe and transmits the detected flow value to the control system, where it is displayed. The data is visualized, making it convenient for experimental personnel to observe the water flow in real time.

[0023] In some specific embodiments, the siphon drainage pipe is a transparent pipe.

[0024] In some specific embodiments, an electric valve is installed on the siphon drain pipe.

[0025] In some specific embodiments, the siphon drain pipe includes a vertical siphon pipe section and a horizontal siphon pipe section, and the pressure sensor is installed in the horizontal siphon pipe section.

[0026] In some specific embodiments, the siphon rainwater hopper is provided with a skirt along its circumferential direction, and a film layer is provided on the skirt. The film layer is hot-air welded to the polymer waterproof membrane of the gutter unit.

[0027] In some embodiments, each of the coated metal plate units includes a plurality of coated metal plates welded together, and the coated metal plates are replaceable.

[0028] In some specific embodiments, each of the coated metal plates includes a plurality of interconnected crests and a plurality of troughs, the crests and troughs being arranged sequentially along the length of the gutter unit, and the crests and troughs being arranged alternately.

[0029] In some specific embodiments, each of the coated metal plates includes a metal layer and a waterproof layer laminated on the metal layer, wherein the waterproof layer is welded to the polymer waterproof membrane of the gutter unit.

[0030] The coated metal plate can be replaced with different plate types or different polymer waterproof layers.

[0031] The polymer waterproof layer is made of materials including polyolefins, polyvinyl chloride, or other materials.

[0032] In some embodiments, the simulated rainfall unit includes multiple sprinkler heads disposed above the membrane-covered metal plate units and gutter units on both sides, and one or more valves for adjusting the flow rate of the multiple sprinkler heads to simulate the different operating conditions. By adjusting the valve opening, the operating conditions of the drainage system under different rainfall conditions (rainfall intensity, rainfall duration, etc.) are controlled, thereby providing empirical data for the actual operation of the drainage system.

[0033] In some embodiments, the testing apparatus further includes a water collection unit for collecting water discharged from the siphon unit.

[0034] In some embodiments, the testing apparatus further includes a pumping unit for pumping water from the water collection unit into the gutter unit; and / or, the pumping unit for pumping water from the water collection unit into the simulated rainfall unit.

[0035] In some embodiments, the testing apparatus further includes a control system, which is electrically connected to the pressure measuring mechanism, the flow measuring mechanism, and the rainfall simulation unit, respectively.

[0036] In some embodiments, the testing device further includes a support and a platform mounted on the support. The gutter unit, the coated metal plate unit, and the simulated rainfall unit are mounted on or above the platform. A glass enclosure is provided around the coated metal plate unit, and the bottom of the glass enclosure is sealed to the platform to prevent water from flowing out of the glass enclosure.

[0037] In some specific embodiments, the testing device further includes a water level detector disposed within the gutter unit for monitoring the water level within the gutter unit, the water level detector being electrically connected to the control system.

[0038] In some specific embodiments, the control system includes a touch screen and / or a display.

[0039] In some embodiments, the testing apparatus further includes a slope adjustment unit for adjusting the tilt angle of the coated metal plate units on each side in the horizontal direction.

[0040] In some specific embodiments, the slope adjustment unit includes a support member disposed between the tabletop and the coated metal plate unit, and a slope adjuster disposed between the tabletop and the support member for adjusting the height of the support member, wherein the slope adjuster is electrically connected to the control system.

[0041] The slope adjustment unit can adjust the slope through the control system, test the change in confluence time under different slope conditions, and transmit the relevant data to the control system for display.

[0042] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0043] The testing device of this invention can be used to test the sealing performance of a siphon drainage system for a membrane metal roof, helping to identify and strengthen weak points in the actual system construction process. The testing device can also be used to test the runoff time and drainage conditions under different slopes, as well as the drainage conditions of different gutters, providing data support for the actual construction of the system, so that the size of the gutter can match the detailed design of the siphon drainage system, avoiding many problems in the later stages, such as poor drainage effect and water seepage. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the test device for a membrane-coated metal roof siphon drainage system, representing a typical embodiment of the present invention.

[0045] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0046] Figure 3 for Figure 1 Front view of the coated metal plate in the testing device;

[0047] Figure 4 for Figure 1 A cross-sectional view of the coated metal plate in the testing device;

[0048] In the diagram: 1. Support frame; 2. Countertop; 3. Coated metal plate unit; 31. Coated metal plate; 311. Crest; 312. Trough; 313. Metal layer; 314. Waterproof layer; 4. Slope adjustment unit; 41. Support component; 42. Slope adjuster; 5. Gutter unit; 51. Gutter; 52. Polymer waterproof membrane; 53. First cover sheet; 54. Fastening assembly; 55. Second cover sheet; 6. Siphon unit; 61. Siphon rainwater hopper; 62. Siphon drainage pipe; 63. Electric valve; 7. Water collection unit; 8. Pumping unit; 81. Water pump; 82. Water supply pipe; 83. Valve. Detailed Implementation

[0049] The technical solutions of the present invention will be described in detail below with reference to specific embodiments, so that those skilled in the art can better understand and implement the technical solutions of the present invention, but the present invention is not limited to the scope of the examples described.

[0050] See Figures 1-4The test apparatus for the siphon drainage system of the film-coated metal roof shown includes a bracket 1 and a platform 2 set on the bracket 1.

[0051] The testing apparatus also includes:

[0052] A coated metal plate unit 3 is provided on opposite sides of the testing device, with each side of the coated metal plate unit 3 extending obliquely in the horizontal direction.

[0053] The slope adjustment unit 4 is used to adjust the tilt angle of each side film-coated metal plate unit 3 in the horizontal direction. Each side film-coated metal plate unit 3 is provided with a slope adjustment unit 4.

[0054] Gutter unit 5 is located between the two membrane-coated metal plate units 3 and below the two membrane-coated metal plate units 3, so that water on the two membrane-coated metal plate units 3 can be drained into the gutter unit 5. The gutter unit 5 is used to test its sealing performance and the flow time under different drainage slopes.

[0055] Siphon unit 6 is connected to gutter unit 5 and is used to drain water from gutter unit 5.

[0056] The simulated rainfall unit (not shown in the figure) is used to simulate different operating conditions required for production experiments.

[0057] The test unit includes a pressure test mechanism and a flow test mechanism for testing the siphon pressure and drainage performance of the siphon unit 6.

[0058] Water collection unit 7 is used to collect water discharged from siphon unit 6;

[0059] Pumping unit 8 is used to pump water from water collection unit 7 to gutter unit 5 and to simulate rainfall unit so that water can be recycled multiple times.

[0060] The control system is electrically connected to the pressure measuring mechanism, the flow measuring mechanism, the rainfall simulation unit, the slope adjustment unit 4, and the pumping unit 8, respectively.

[0061] See Figure 1 The gutter unit 5 is set on the platform 2, the film-coated metal plate unit 3 is set on the support 1 and located above the platform 2, the simulated rainfall unit is set on the support 1 and located above the film-coated metal plate unit 3 and the gutter unit 5, the slope adjustment unit 4 is set on the platform 2 and located between the platform 2 and the film-coated metal plate unit 3, and the water collection unit 7 includes a water storage tank, which is set on the support 1 and located below the platform 2. A glass fence is also set around the film-coated metal plate unit 3, and the bottom of the glass fence is sealed to the platform 2 to prevent water from flowing out of the glass fence.

[0062] The testing device also includes a water level detector installed inside the gutter unit 5 to monitor the water level inside the gutter unit 5. The water level detector is electrically connected to the control system.

[0063] The following is a detailed description of each unit of the testing device:

[0064] See Figures 3-4 Each side of the coated metal plate unit 3 includes multiple coated metal plates 31 that are hot-air welded together. Each coated metal plate 31 includes multiple interconnected crests 311 and troughs 312. The crests 311 and troughs 312 are arranged sequentially along the length of the gutter unit 5, and the crests 311 and troughs 312 are arranged alternately. Each coated metal plate 31 includes a metal layer 313 and a waterproof layer 314 laminated on the metal layer 313, with the waterproof layer 314 facing upwards. The waterproof layer 314 can be made of polyolefin, polyvinyl chloride, or other polymer materials.

[0065] The membrane-coated metal panel 31 is replaceable; specifically, different panel types and different waterproof layers 314 can be used to replace the membrane-coated metal panels. This allows for different drainage conditions of the membrane-coated metal panel 31, enabling the selection of the desired membrane-coated metal panel during actual construction.

[0066] See Figure 2 The gutter unit 5 includes a gutter 51, a polymer waterproof membrane 52 covering the gutter 51, first cover plates 53 respectively disposed on both sides of the testing device, a fastening assembly 54 passing through the polymer waterproof membrane 52 and the gutter 51 in sequence and used to fix the polymer waterproof membrane 52 and the gutter 51 to the platform 2, and a second cover plate 55 covering the fastening assembly 54. The two sides of the polymer waterproof membrane 52 extend out of the gutter 51 and respectively cover the two sides of the film-coated metal plates 31. The two sides of the polymer waterproof membrane 52 are hot-air welded to the two sides of the film-coated metal plates 31. One side of each first cover plate 53 is hot-air welded to the corresponding side of the film-coated metal plate 31, and the other side is hot-air welded to the polymer waterproof membrane 52. The second cover plate 55 is hot-air welded to the polymer waterproof membrane 52 to form a sealed waterproof.

[0067] Gutter 51 is replaceable for testing operating conditions under different gutter volumes and cross-sections. These operating conditions include the sealing performance of the gutter unit, the confluence time under different drainage slopes, siphon pressure, and drainage performance.

[0068] The polymer waterproof membrane 52, the waterproof layer 314 on the membrane metal plate 31, the first covering sheet 53, and the second covering sheet 55 are usually made of the same material, such as polyolefin or polyvinyl chloride or other similar polymer materials. They can be replaced to achieve a better match for sealing and waterproofing.

[0069] The siphon unit 6 includes a siphon rainwater hopper 61 installed on the gutter unit 5 and a siphon drain pipe 62 connected to the siphon rainwater hopper 61. The pressure testing mechanism includes a pressure sensor installed inside the siphon drain pipe 62. The flow testing mechanism includes a flow meter for detecting the outflow of water from the siphon drain pipe 62. The flow meter is installed at the outlet end of the siphon drain pipe 62.

[0070] The siphon drain pipe 62 is a transparent pipe, making it easy to observe the water flow.

[0071] An electric valve 63 is installed on the siphon drainage pipe 62, and the electric valve 63 is electrically connected to the control system.

[0072] The siphon drain pipe 62 specifically includes a vertical siphon pipe section and a horizontal siphon pipe section. The pressure sensor is installed in the horizontal siphon pipe section, the electric valve 63 is installed in the vertical siphon pipe section, and the flow meter is installed in the vertical siphon pipe section.

[0073] The siphon rainwater hopper 61 has a skirt along its circumference, and a membrane layer is provided on the skirt. The membrane layer is hot-air welded to the polymer waterproof membrane of the gutter unit 5 to seal and waterproof it.

[0074] Both the siphon rainwater hopper 61 and the siphon drainage pipe 62 are replaceable. By replacing the siphon rainwater hopper 61 and the siphon drainage pipe 62 with different models and sizes, the siphon pressure and drainage performance of the siphon rainwater hopper 61 and the siphon drainage pipe 62 of different specifications and sizes can be tested.

[0075] The simulated rainfall unit includes multiple sprinkler heads positioned above the two membrane-covered metal plate units 3 and the gutter unit 5, and one or more valves for adjusting the flow rate of the sprinkler heads to simulate different operating conditions. The valves are used to adjust the flow rate of the sprinkler heads to simulate drainage under different rainfall conditions. The valves can be controlled by a control system.

[0076] The slope adjustment unit 4 includes a support member 41 disposed between the platform 2 and the coated metal plate unit 3, and a slope adjuster 42 disposed between the platform 2 and the support member 41 for adjusting the height of the support member 41 to adjust the slope of the coated metal plate unit 3. This allows the desired installation slope of the coated metal plate unit 3 to be selected during actual construction.

[0077] The pumping unit 8 includes a water pump 81 installed in a water storage tank, a water delivery pipe 82 connecting the gutter unit 5 and the water pump 81, and connecting the simulated rainfall unit and the water pump 81, and a valve 83 installed on the water delivery pipe 82. The water delivery pipe 82 is a transparent pipe.

[0078] Specifically, the gutter 51 includes a bottom wall, side walls located on both sides of the bottom wall, and a support wall connected to the upper end of the side walls. The support wall extends horizontally or extends obliquely in a horizontal direction. A polymer waterproof membrane 52 covers the bottom wall and the side walls, and a coated metal plate unit 3 is disposed above the support wall. In some embodiments, the testing device further includes a wire mesh disposed between the support wall and the coated metal plate unit 3, and an insulation layer disposed between the wire mesh and the coated metal plate unit 3. A slope adjustment unit 4 is disposed between the support wall and the platform 2.

[0079] The control system includes a touch screen, which allows users to set the operating conditions of the simulated rainfall unit (rainfall intensity, rainfall duration, etc.), open the electric valve on the siphon drainage pipe, start the water pump in the pumping unit, set the sealing performance test time, and input various parameters. The touch screen can also be used as a display to show various test results, making the data visual and easy to observe.

[0080] The working principle and usage of the testing device described above are as follows:

[0081] During the sealing performance test of the gutter unit, the electric valve on the siphon drain pipe is closed, and the water pump is turned on to transport water from the water collection unit 7 to the gutter unit 5 through the water supply pipe 82. When the water level reaches the preset level (usually the full water level), the water supply is stopped. After a certain period of time (the time interval between reaching the water level in front of the corresponding siphon rainwater hopper in the experiment), the water level detector detects the water level change and transmits it to the control system. The seepage situation at each waterproof node on the gutter unit 5 is observed so that waterproof reinforcement treatment can be carried out on the seepage node during the actual system construction to prevent seepage.

[0082] When conducting runoff time tests under different drainage slopes, the time it takes for the water in the gutter to reach a certain depth (the gutter water depth when the water level in front of the corresponding siphon rainwater hopper in the experiment) is controlled under different rainfall conditions in the simulated rainfall unit.

[0083] Drainage performance testing involves controlling a simulated rainfall unit under different rainfall conditions and measuring the drainage performance using a flow meter.

[0084] The siphon pressure test controls the simulated rainfall unit to detect the siphon pressure via a pressure sensor under different rainfall conditions.

[0085] After replacing the gutter, the operating conditions under different gutter volumes and cross-sections were tested, referring to the above-mentioned sealing performance test, drainage performance test, and flow confluence time test.

[0086] After replacing the membrane-coated metal plate, siphon rainwater hopper, and siphon drainage pipe, the operating conditions of different membrane-coated metal plates, siphon rainwater hoppers, and siphon drainage pipes were tested in accordance with the above-mentioned drainage performance, siphon pressure, and confluence time tests.

[0087] With the help of the testing device disclosed herein, construction workers can ensure that the gutter dimensions match the detailed design of the siphon drainage system before the construction of the roof siphon drainage system, thus avoiding many problems that may occur later, such as poor drainage effect and water seepage, and greatly reducing construction costs.

[0088] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

[0089] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

Claims

1. A testing device for a membrane-coated metal roof siphon drainage system, characterized in that, Includes coated metal panel units, gutter units, siphon units, simulated rainfall units, and testing units. The coated metal plate units are respectively disposed on both sides of the gutter unit, and each side of the coated metal plate unit extends obliquely in the horizontal direction with an adjustable oblique angle. The gutter unit is disposed between the two membrane metal plate units on both sides and located below the two membrane metal plate units on both sides, so that water on the two membrane metal plate units on both sides can be drained into the gutter unit. The gutter unit is tested for at least one of the sealing performance and the flow time under different drainage slopes. When conducting the flow time test under different drainage slopes, the time it takes for the water in the gutter to reach a certain depth is controlled by the simulated rainfall unit under different rainfall conditions. The siphon unit is connected to the gutter unit and is used to drain the water from the gutter unit; The simulated rainfall unit is used to generate different operating conditions required for the experiment; The test unit includes at least one of a pressure test mechanism and a flow test mechanism, for testing at least one of the siphon pressure and drainage performance of the siphon unit, wherein the drainage performance refers to the water output of the siphon unit. The gutter unit includes a gutter, a polymer waterproof membrane covering the gutter, and first covering sheets respectively disposed on both sides of the gutter. The polymer waterproof membrane extends out of the gutter from both sides and covers the two sides of the membrane-coated metal plate unit. The two sides of the polymer waterproof membrane are welded to the two sides of the membrane-coated metal plate unit. One side of each first covering sheet is welded to the corresponding side of the membrane-coated metal plate unit, and the other side is welded to the polymer waterproof membrane. The testing device also includes a bracket and a platform mounted on the bracket. The gutter unit also includes a fastening component that passes through the polymer waterproof membrane and the gutter in sequence and is used to fix the polymer waterproof membrane and the gutter on the platform, and a second cover plate covering the fastening component. The second cover plate is welded to the polymer waterproof membrane. The siphon unit includes a siphon rainwater bucket installed on the gutter unit and a siphon drainage pipe connected to the siphon rainwater bucket. The pressure testing mechanism includes a pressure sensor installed inside the siphon drainage pipe. The flow testing mechanism includes a flow meter for detecting the outflow of water from the siphon drainage pipe. Each of the coated metal plate units on each side includes multiple coated metal plates welded together, and the coated metal plates are replaceable; Each of the coated metal plates includes multiple peaks and multiple troughs that are interconnected. The peaks and troughs are arranged sequentially along the length of the gutter unit, and the peaks and troughs are arranged alternately. The testing device also includes a slope adjustment unit, which is used to adjust the tilt angle of the coated metal plate unit on each side in the horizontal direction. The testing device also includes a control system, which is electrically connected to the pressure testing mechanism, the flow measurement mechanism, and the rainfall simulation unit, respectively.

2. The testing device for the siphon drainage system of the coated metal roof as described in claim 1, characterized in that: The gutter in the gutter unit is replaceable to test the operating conditions of the drainage system under different gutter volumes and different gutter cross sections. The operating conditions of the drainage system under different gutter volumes and different gutter cross sections include at least one of the sealing performance of the gutter unit, the confluence time under different drainage slopes, and the siphon pressure and drainage performance of the siphon unit.

3. The testing device for the siphon drainage system of the coated metal roof as described in claim 1, characterized in that: The siphon rainwater hopper is replaceable, and the siphon drainage pipe is replaceable; and / or, the siphon drainage pipe is a transparent pipe; and / or, an electric valve is installed on the siphon drainage pipe; and / or, the siphon drainage pipe includes a vertical siphon pipe section and a horizontal siphon pipe section, and the pressure sensor is installed inside the horizontal siphon pipe section; and / or, the siphon rainwater hopper has a skirt along its circumferential direction, and a film layer is provided on the skirt, and the film layer is welded to the polymer waterproof membrane of the gutter unit.

4. The testing device for the siphon drainage system of a membrane-coated metal roof according to claim 1, characterized in that: Each of the aforementioned coated metal panels includes a metal layer and a waterproof layer laminated on the metal layer, wherein the waterproof layer is welded to the polymer waterproof membrane of the gutter unit.

5. The testing device for the siphon drainage system of a membrane-coated metal roof according to claim 1, characterized in that: The simulated rainfall unit includes multiple sprinkler heads disposed above the membrane metal plate unit and the gutter unit on both sides, and one or more valves for adjusting the flow rate of the multiple sprinkler heads to simulate the different operating conditions.

6. The testing device for the siphon drainage system of a membrane-coated metal roof according to claim 1, characterized in that: The testing device also includes a water collection unit for collecting water discharged from the siphon unit.

7. The testing device for the siphon drainage system of a membrane-coated metal roof according to claim 6, characterized in that: The testing device further includes a pumping unit for pumping water from the water collection unit to the gutter unit; and / or, the pumping unit for pumping water from the water collection unit to the simulated rainfall unit.

8. The testing device for the siphon drainage system of a coated metal roof as described in claim 1, characterized in that: The testing device also includes a support and a platform mounted on the support. The gutter unit, the coated metal plate unit, and the simulated rainfall unit are mounted on or above the platform. A glass enclosure is provided around the coated metal plate unit. The bottom of the glass enclosure is sealed to the platform to prevent water from flowing out of the glass enclosure.

9. The testing device for the siphon drainage system of a coated metal roof as described in claim 8, characterized in that: The testing device further includes a water level detector disposed within the gutter unit for monitoring the water level within the gutter unit, the water level detector being electrically connected to the control system; and / or, the control system includes a touch screen and / or a display; and / or, the slope adjustment unit includes a support member disposed between the platform and the coated metal plate unit and a slope adjuster disposed between the platform and the support member for adjusting the height of the support member.

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