Test device for coated metal sheet-based siphonic roof drainage system

Abstract

A test device for a coated metal sheet-based siphonic roof drainage system, comprising: coated metal sheet units (3) on two sides; a gutter unit (5), wherein the gutter unit (5) is arranged between the coated metal sheet units (3) on the two sides, located below the coated metal sheet units (3) on the two sides, and used for testing at least one of the sealing performance of the gutter unit and the confluence time under different drainage slopes; a siphon unit (6), used for discharging water from the gutter unit (5); a rainfall simulation unit; and a test unit, used for testing at least one of the siphon pressure and drainage performance of the siphon unit (6). The test device can be used to test the sealing performance of the system, the confluence time under different slopes, the drainage condition, and the like, so that data support is provided for the actual construction of the system, in order to enable the size of a gutter to match the detailed design of a siphonic drainage system, thereby avoiding many problems present in the later stage, such as poor drainage and water seepage.

Description

A testing device for the siphon drainage system of a membrane-covered metal sheet roof Technical Field

[0001] The invention belongs to the technical field of roof siphon drainage systems, and in particular relates to a testing device for a membrane-clad metal plate roof siphon drainage system. Background Art

[0002] Traditional roof gutters lack a good seal with the tiles or steel panels. If the drainage system's outlets become clogged or municipal rainwater wells flood, the water level in the gutters will gradually rise, potentially overflowing through the gaps between the gutter and the roof panels and damaging indoor facilities. The fused tile roofing system utilizes a fully welded process, offering excellent sealing and durability, meeting the latest waterproofing requirements for steel roofs in GB55030-2022. However, existing gutter installation companies lack technical coordination with siphonic drainage system companies. This means the gutter dimensions haven't been verified based on gutter capacity, leading to a mismatch between the dimensions and the detailed design of the siphonic drainage system, causing numerous problems later on.

[0003] Currently, there is no testing device that can test the matching between the detailed design of the siphonic drainage system of the membrane-covered metal sheet roof and the gutter size. Summary of the Invention

[0004] The technical problem actually solved by the present invention is to address the shortcomings of the existing technology and provide a testing device for the siphon drainage system of a membrane-coated metal sheet roof, so as to solve the problem of mismatch between the gutter size and the siphon drainage system and avoid the occurrence of many problems in the later stage.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A testing device for a siphonic drainage system of a membrane-covered metal sheet roof, comprising:

[0007] A film-coated metal plate unit is provided on both sides of the test device, wherein the film-coated metal plate unit on each side is extended and tilted in the horizontal direction and the tilt angle is adjustable;

[0008] A gutter unit is provided between the film-clad metal plate units on both sides and is located below the film-clad metal plate units on both sides so that water on the film-clad 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 confluence time under different drainage slopes;

[0009] a siphon unit, the siphon unit being in communication with the gutter unit and being configured to discharge water from the gutter unit;

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

[0011] A testing 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 for testing the 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 sealing performance of the gutter unit, the confluence time under different drainage slopes, the siphon pressure and the drainage performance.

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

[0014] In some embodiments, the gutter unit includes a gutter, a polymer waterproof membrane covering the gutter, and first covering sheets respectively provided on the two sides of the testing device, the two sides of the polymer waterproof membrane respectively extending out of the gutter and respectively covering the film-coated metal plate units on both sides, and the two sides of the polymer waterproof membrane are welded to the film-coated metal plate units on both sides;

[0015] One side of the first covering sheet on each side is welded to the film-coated metal plate unit on the corresponding side, 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 table top arranged on the bracket, and the gutter unit further includes a fastening assembly 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 table top, and a second covering sheet covering the fastening assembly, and the second covering sheet is hot-air welded to the polymer waterproof membrane.

[0017] Furthermore, the first and second cover sheets are selected based on the material of the polymer waterproofing membrane and can be selected based on actual test conditions. Typically, the first and second cover sheets are made of the same material as the polymer waterproofing membrane. If the polymer waterproofing membrane is a polyolefin waterproofing membrane, the first and second cover sheets are made of polyolefin. If the polymer waterproofing membrane is a polyvinyl chloride waterproofing membrane, the first and second cover sheets are made of polyvinyl chloride.

[0018] In some embodiments, the siphon unit includes a siphon rainwater gutter arranged on the gutter unit and a siphon drain pipe connected to the siphon rainwater gutter, the pressure testing mechanism includes a pressure sensor arranged in the siphon drain pipe, and the flow testing mechanism includes a flow detection meter for detecting the water output of the siphon drain pipe.

[0019] In some embodiments, the siphonic rainwater bucket is replaceable, and the siphonic drain pipe is replaceable. The size, specifications, and models of the siphonic rainwater bucket are replaceable, and the material, size, and specifications of the siphonic drain pipe are replaceable. When replacing the siphonic rainwater bucket and the siphonic drain pipe, the diameter of the siphonic drain pipe must match the diameter of the siphonic rainwater bucket.

[0020] The siphon unit includes transparent pipes and fittings of different diameters and is fixed to the load-bearing structure of the device through fixing parts, so that the experimenter can 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 different siphon rainwater buckets and siphon drainage pipes.

[0022] The flow meter of the flow testing mechanism is set at the water outlet of the siphon drain pipe, and transmits the detected flow value to the control system and displays it on the control system. The data is visualized, which makes it convenient for experimenters to observe the water flow situation in real time.

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

[0024] In some specific embodiments, an electric valve is provided 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 disposed in the horizontal siphon pipe section.

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

[0027] In some embodiments, the film-clad metal plate unit on each side includes a plurality of film-clad metal plates welded together, and the film-clad metal plates are replaceable.

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

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

[0030] The film-coated metal plate can be replaced with a film-coated metal plate of different plate shapes or different polymer waterproof layers.

[0031] The material of the polymer waterproof layer includes polyolefin, polyvinyl chloride or other materials.

[0032] In some embodiments, the simulated rainfall unit includes multiple sprinklers positioned above the coated metal sheet unit and gutter unit on both sides, and one or more valves for adjusting the flow of the multiple sprinklers to simulate the various operating conditions. By adjusting the valve opening, the drainage system's operating conditions under various 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 device further comprises a water collecting unit configured to collect water discharged from the siphon unit.

[0034] In some embodiments, the testing device further includes a pumping unit, which is used to pump the water in the water collecting unit into the gutter unit; and / or, the pumping unit is used to pump the water in the water collecting unit into the simulated rainfall unit.

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

[0036] In some embodiments, the testing device further includes a bracket and a table top disposed on the bracket, the gutter unit, the coated metal plate unit, and the simulated rainfall unit are disposed on or above the table top, and a glass fence is disposed around the coated metal plate unit, and the bottom of the glass fence is sealed with the table top 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 in the gutter unit for monitoring the water level in the gutter unit, and the water level detector is electrically connected to the control system.

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

[0039] In some embodiments, the testing device further includes a slope adjustment unit, configured to adjust the inclination angle of the film-clad metal sheet units on each side along the horizontal direction.

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

[0041] The slope adjustment unit can adjust the slope through the control system, test the change of confluence time under different slope conditions, and the relevant data can be transmitted 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 the present invention can be used to test the sealing of the siphonic drainage system of the film-coated metal sheet roof, so as to help find the weak points in the actual system construction process and strengthen them. The testing device can also be used to test the confluence time and drainage conditions under different slopes, the drainage conditions of different gutters, etc., to provide data support for the actual construction of the system, so as to expect that the gutter size can match the in-depth design of the siphonic drainage system, and avoid many problems that may exist in the later stage, such as poor drainage effect, water seepage and other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a schematic structural diagram of a test device for a siphonic drainage system of a film-covered metal sheet roof according to a representative embodiment of the present invention;

[0045] Figure 2 is an enlarged schematic diagram of point A in Figure 1;

[0046] FIG3 is a front view of the film-coated metal plate in the testing device of FIG1 ;

[0047] FIG4 is a cross-sectional view of the film-coated metal plate in the testing device of FIG1 ;

[0048] In the figure: 1. bracket; 2. table top; 3. film-coated metal plate unit; 31. film-coated metal plate; 311. crest part; 312. trough part; 313. metal layer; 314. waterproof layer; 4. slope adjustment unit; 41. support member; 42. slope adjuster; 5. gutter unit; 51. gutter; 52. polymer waterproof membrane; 53. first covering sheet; 54. fastening assembly; 55. second covering sheet; 6. siphon unit; 61. siphon rainwater gutter; 62. siphon drain pipe; 63. electric valve; 7. water collection unit; 8. pumping unit; 81. water pump; 82. water pipe; 83. valve. DETAILED DESCRIPTION

[0049] The technical solutions of the present invention are described in detail below in conjunction with 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.

[0050] Referring to the test device of the film-covered metal sheet roof siphon drainage system shown in FIG. 1 to FIG. 4 , the test device includes a bracket 1 and a table 2 arranged on the bracket 1 .

[0051] The test setup also includes:

[0052] The film-coated metal plate units 3 are respectively provided on two opposite sides of the test device, and the film-coated metal plate units 3 on each side are arranged to extend obliquely in the horizontal direction;

[0053] A slope adjustment unit 4 is used to adjust the inclination angle of each side film-coated metal plate unit 3 along the horizontal direction. Each side film-coated metal plate unit 3 is correspondingly provided with a slope adjustment unit 4;

[0054] The gutter unit 5 is arranged between the two sides of the film-coated metal plate units 3 and is located below the two sides of the film-coated metal plate units 3 so that the water on the two sides of the film-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 confluence time under different drainage slopes;

[0055] The siphon unit 6 is connected to the gutter unit 5 and is used to drain the water in the gutter unit 5;

[0056] A simulated rainfall unit (not shown in the figure) is used to produce different operating conditions required for the experiment;

[0057] A testing unit, comprising a pressure testing mechanism and a flow testing mechanism, for testing the siphon pressure and drainage performance of the siphon unit 6;

[0058] A water collecting unit 7, which is used to collect water discharged from the siphon unit 6;

[0059] The pumping unit 8 is used to pump the water in the water collecting unit 7 to the gutter unit 5 and to pump the water in the water collecting unit 7 to the simulated rainfall unit so that the 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 42 and the pumping unit 8 respectively.

[0061] Referring to Figure 1, the gutter unit 5 is arranged on the table 2, the film-coated metal plate unit 3 is arranged on the bracket 1 and is located above the table 2, the simulated rainfall unit is arranged on the bracket 1 and is located above the film-coated metal plate unit 3 and the gutter unit 5, the slope adjustment unit 4 is arranged on the table 2 and is located between the table 1 and the film-coated metal plate unit 3, the water collection unit 7 includes a water reservoir, the water reservoir is arranged on the bracket 1 and is located below the table 2, and a glass fence is also arranged around the film-coated metal plate unit 3, and the bottom of the glass fence is sealed with the table 1 to prevent water from flowing out of the glass fence.

[0062] The testing device further includes a water level detector disposed in the gutter unit 5 for monitoring the water level in the gutter unit 5 , and the water level detector is electrically connected to the control system.

[0063] The following is a detailed introduction to each unit of the test device:

[0064] As shown in Figures 3-4 , each side-laminated metal plate unit 3 comprises multiple laminated metal plates 31 welded together using hot air welding. Each laminated metal plate 31 includes multiple interconnected peaks 311 and troughs 312. The peaks 311 and troughs 312 are arranged sequentially along the length of the gutter unit 5, alternating between the peaks 311 and troughs 312. Each laminated metal plate 31 includes a metal layer 314 and a waterproof layer 315 laminated on the metal layer 314, with the waterproof layer 315 facing upward. The waterproof layer 315 can be made of polyolefin, polyvinyl chloride, or other polymer materials.

[0065] The film-coated metal plate 31 is replaceable, specifically, the film-coated metal plate with different plate shapes and different waterproof layers 315 can be replaced to be used for different drainage conditions of the film-coated metal plate 31, so that the desired film-coated metal plate can be selected during actual construction.

[0066] 2 , the gutter unit 5 includes a gutter 51, a polymer waterproof membrane 52 covering the gutter 51, first covering sheets 53 respectively arranged on both sides of the test device, a fastening assembly 54 that passes through the polymer waterproof membrane 52 and the gutter 51 in sequence and is used to fix the polymer waterproof membrane 52 and the gutter 51 on the table 2, and a second covering sheet 55 covering the fastening assembly 54. Both sides of the polymer waterproof membrane 52 extend out of the gutter 51 and respectively cover the film-coated metal plates 31 on both sides. Both sides of the polymer waterproof membrane 52 are hot-air welded to the film-coated metal plates 31 on both sides; one side of the first covering sheet 53 on each side is hot-air welded to the film-coated metal plate 31 on the corresponding side, and the other side is hot-air welded to the polymer waterproof membrane 52; the second covering sheet 55 is hot-air welded to the polymer waterproof membrane 52 to form a sealed waterproof structure.

[0067] The gutter 51 is replaceable and can be used to test the operating conditions under different gutter volumes and different gutter cross-sections. The operating conditions under different gutter volumes and different gutter cross-sections include the sealing performance of the gutter unit, the confluence time under different drainage slopes, the siphon pressure and the drainage performance.

[0068] The polymer waterproof roll 52, the waterproof layer 315 on the film-coated metal plate 31, the first cover sheet 53, and the second cover sheet 55 are usually made of the same material, such as polyolefin or polyvinyl chloride or other similar polymer materials, and can be replaced to achieve a better match for sealing and waterproofing effects.

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

[0070] The siphon drain pipe 62 is a transparent pipe, which is convenient for observing the water flow state.

[0071] An electric valve 63 is provided on the siphon drain 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 arranged in the horizontal siphon pipe section, the electric valve 63 is arranged in the vertical siphon pipe section, and the flow meter is arranged in the vertical siphon pipe section.

[0073] The siphon rainwater bucket 61 is provided with a skirt along its circumferential direction, and a coating layer is provided on the skirt. The coating layer is hot-air welded to the polymer waterproof coil of the gutter unit 5 to achieve sealing and waterproofing.

[0074] The siphon rainwater bucket 61 and the siphon drainage pipe 62 are both replaceable. By replacing the siphon rainwater bucket 61 and the siphon drainage pipe 62 of different models and sizes, the siphon pressure and drainage conditions of the siphon rainwater bucket 61 and the siphon drainage pipe 62 of different specifications and sizes can be tested.

[0075] The simulated rainfall unit includes multiple sprinkler heads located above the coated metal plate unit 3 and the gutter unit 5 on both sides, and one or more valves for adjusting the flow of the sprinkler heads to simulate different operating conditions. The valves adjust the flow 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 tabletop 2 and the film-clad metal sheet unit 3, and a slope adjuster 42 disposed between the tabletop 2 and the support member 41 for adjusting the height of the support member 41 to adjust the slope of the film-clad metal sheet unit 3. This allows the desired installation slope of the film-clad metal sheet unit 3 to be selected during actual construction.

[0077] The pumping unit 8 includes a water pump 81 disposed in the water reservoir, a water pipe 82 connected between the gutter unit 5 and the water pump 81 and between the simulated rainfall unit and the water pump 81, and a valve 83 disposed on the water pipe 82. The water pipe 82 is a transparent pipe.

[0078] Specifically, the gutter 51 comprises a bottom wall, sidewalls on either side of the bottom wall, and support walls connected to the upper ends of the sidewalls. The support walls extend horizontally or extend horizontally and obliquely. A polymer waterproofing membrane 52 covers the bottom wall and sidewalls, and the film-coated metal sheet unit 3 is positioned above the support walls. In some embodiments, the testing device further includes a wire mesh positioned between the support wall and the film-coated metal sheet unit 3, and an insulation layer positioned between the wire mesh and the film-coated metal sheet unit 3. The slope adjustment unit 4 is positioned between the support wall and the tabletop 2.

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

[0080] The working principle and usage of the test device set up above:

[0081] When testing the gutter unit's sealing performance, the electric valve on the siphon drain pipe is closed, and the water pump is turned on to pump water from the water collection unit 7 into the gutter unit 5 via the water delivery pipe 82. When the water level reaches a preset level (usually the full level), water delivery is stopped. After a certain period of time (the time interval required to reach the corresponding water level in front of the siphon rainwater bucket of the experimental model), the water level meter detects the water level change and transmits it to the control system. Water seepage at each waterproofing node on the gutter unit 5 is monitored, so that waterproof reinforcement can be performed on these leaking nodes during actual system construction to prevent water seepage.

[0082] When conducting confluence 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 siphon rainwater bucket in the experiment corresponds to) is controlled under different rainfall conditions in the simulated rainfall unit.

[0083] Drainage performance test: control the simulated rainfall unit under different rainfall conditions and test the drainage performance through the flow meter.

[0084] Siphon pressure test: control the simulated rainfall unit under different rainfall conditions and detect the siphon pressure through the pressure sensor.

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

[0086] After replacing the coated metal plates, siphon rainwater buckets, and siphon drainage pipes, refer to the above drainage performance, siphon pressure, and confluence time tests to conduct operating conditions of different coated metal plates, siphon rainwater buckets, and siphon drainage pipes.

[0087] With the help of the test device disclosed herein, construction workers can match the gutter size with the in-depth design of the siphonic drainage system before the construction of the roof, avoiding many problems that may exist later, such as poor drainage effect and water seepage, and greatly reducing construction costs.

[0088] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

[0089] The endpoints of the ranges and any values ​​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 endpoints of each range, the endpoints of each range and individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.

Claims

1. A test device for a siphonic drainage system of a metal plate roof with a film coating, characterized in that, Comprising: A film-coated metal plate unit, with the film-coated metal plate units respectively arranged on both sides of the test device. Each film-coated metal plate unit extends obliquely in the horizontal direction and the inclination angle is adjustable. A gutter unit, which is arranged between the film-coated metal plate units on both sides and is located below the film-coated metal plate units on both sides, so that the water on the film-coated metal plate units on both sides can drain into the gutter unit. The gutter unit is used to test at least one of its sealing performance and the confluence time under different drainage slopes. A siphon unit, which is communicated with the gutter unit and is used to drain the water in the gutter unit. A simulated rainfall unit, which is used to generate different operating conditions required for the test. A test unit, which includes at least one of a pressure test mechanism and a flow rate test mechanism, and is used to test at least one of the siphon pressure and drainage performance of the siphon unit.

2. The testing device for the siphonic drainage system of the metal plate roof with film coating according to claim 1, characterized in that: The gutter in the gutter unit is replaceable, and is used to test the 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 sealing performance of the gutter unit, the confluence time under different drainage slopes, the siphon pressure and the drainage performance.

3. The test device for the siphonic drainage system of the metal roof with film coating according to claim 1 or 2, characterized in that: The gutter unit includes a gutter, a polymer waterproofing membrane covering the gutter, and first covering sheets respectively arranged on both sides of the test device. The two sides of the polymer waterproofing membrane respectively extend out of the gutter and respectively cover the film-coated metal plate units on both sides, and the two sides of the polymer waterproofing membrane are welded to the film-coated metal plate units on both sides. One side edge of each first covering sheet is welded to the corresponding film-coated metal plate unit, and the other side edge is welded to the polymer waterproofing membrane.

4. The testing device for the siphonic drainage system of the metal roof with film coating according to claim 3, characterized in that: The test device further includes a bracket and a tabletop arranged on the bracket. The gutter unit further includes a fastening component that sequentially passes through the polymer waterproofing membrane and the gutter and is used to fix the polymer waterproofing membrane and the gutter on the tabletop, and a second covering sheet covering the fastening component. The second covering sheet is welded to the polymer waterproofing membrane.

5. The testing device for the siphonic drainage system of the metal plate roof with film covering according to claim 1 or 2, characterized in that: The siphon unit includes a siphon rainwater hopper arranged on the gutter unit and a siphon drain pipe communicated with the siphon rainwater hopper. The pressure test mechanism includes a pressure sensor arranged in the siphon drain pipe, and the flow rate test mechanism includes a flow rate detector for detecting the water discharge amount of the siphon drain pipe.

6. The test device for the siphonic drainage system of the metal plate roof with film covering according to claim 5, characterized in that: The siphon rainwater hopper is replaceable, and the siphon drain pipe is replaceable; and / or, The siphon drain pipe is a transparent pipe; and / or, An electric valve is arranged on the siphon drain pipe; and / or, The siphon drain pipe includes a vertical siphon pipe section and a horizontal siphon pipe section, and the pressure sensor is arranged in the horizontal siphon pipe section; and / or, The siphon rainwater hopper is provided with a skirt along its circumferential direction, and a film layer is arranged on the skirt. The film layer is welded to the polymer waterproofing membrane of the gutter unit.

7. The test device for the siphonic drainage system of the metal plate roof with film covering according to claim 1, characterized in that: Each film-coated metal plate unit on both sides includes a plurality of film-coated metal plates welded together, and the film-coated metal plates are replaceable.

8. The test device for the siphonic drainage system of the metal plate roof with film coating according to claim 7, characterized in that: Each of the coated metal plates includes a plurality of crest portions and a plurality of trough portions that are connected to each other. The crest portions and the trough portions are arranged in sequence along the length direction of the gutter unit, and the crest portions and the trough portions are arranged alternately; and / or, Each of the coated metal plates includes a metal layer and a waterproof layer laminated on the metal layer, and the waterproof layer is welded to the polymer waterproof coiled material of the gutter unit.

9. The testing device for the siphonic drainage system of the metal plate roof with film coating according to claim 1, wherein: The simulated rainfall unit includes a plurality of spray heads arranged above the coated metal plate units and the gutter unit on both sides and one or more valves for adjusting the flow rates of the plurality of spray heads to simulate different operating conditions.

10. The testing device for the siphonic drainage system of the metal plate roof with film covering according to claim 1, characterized in that: The test device further includes a water collection unit for collecting the water discharged from the siphon unit.

11. The testing device for the siphonic drainage system of the metal plate roof with film coating according to claim 10, characterized in that: The test device further includes a pumping unit for pumping the water in the water collection unit into the gutter unit; and / or, the pumping unit is for pumping the water in the water collection unit into the simulated rainfall unit.

12. The testing device for the siphonic drainage system of the metal plate roof with film coating according to claim 1, characterized in that: The test device further includes a slope adjustment unit for adjusting the inclination angle of each coated metal plate unit in the horizontal direction; and / or, The test device further includes a control system, and the control system is electrically connected to the pressure measuring mechanism, the flow rate measuring mechanism, and the rainfall simulation unit respectively; and / or, The test device further includes a bracket and a tabletop arranged on the bracket. The gutter unit, the coated metal plate unit, and the simulated rainfall unit are arranged on the tabletop or above the tabletop. A glass fence is arranged around the coated metal plate unit, and the bottom of the glass fence is hermetically connected to the tabletop to prevent water from flowing out of the glass enclosure.

13. The test device for the siphonic drainage system of the metal plate roof with film coating according to claim 12, characterized in that: The test device further includes a water level detector arranged in the gutter unit for monitoring the water level in the gutter unit, and the water level detector is 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 arranged between the tabletop and the coated metal plate unit and a slope adjuster arranged between the tabletop and the support member for adjusting the height of the support member.

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