A method for draining a garage roof

Abstract

The present invention discloses a drainage method for a garage roof slab. A siphonic rainwater bucket is provided at the drainage outlet above the garage roof slab to achieve drainage. It is characterized in that, at the initial and later stages of rainfall, when the amount of rainwater collected at the drainage outlet is insufficient, make-up water is provided to the vertical drainage pipe below the siphonic rainwater bucket to improve the siphonic drainage effect and drainage efficiency, wherein the make-up water is obtained by filtering the rainwater collected from the catchment ground outside the garage roof slab. The present invention has the advantages of being able to collect and utilize rainwater to improve the early drainage capacity of the garage roof slab drainage structure and improve its drainage stability.

Description

Technical Field

[0001] The present invention relates to the technical field of garage roof drainage, and specifically relates to a garage roof drainage method. Background Art

[0002] With the development of society and the intensification of urbanization, the construction industry has developed rapidly. The large-span development of garage roofs often has a large area, and a special rainwater drainage structure needs to be set up to prevent rainwater accumulation from causing garage leakage. The existing rainwater drainage structure of garages usually adopts the structure of roof siphonic rainwater funnels to better improve the drainage effect by using the siphon principle. However, in the prior art, at the initial stage of rainfall, due to the small amount of rainwater, it takes a certain amount of time for the siphonic rainwater funnels on the garage roof to reach the siphon state, resulting in the drainage capacity of the siphonic rainwater funnel system not being able to reach the maximum value in a short time, and the rainwater drainage not being timely, which easily leads to leakage.

[0003] Specifically, during the rainfall process, as the amount of rain increases or decreases, the pressure and water flow state in the siphonic rainwater pipe will change repeatedly, and it is impossible to keep the water flow in the siphon state all the time, resulting in the drainage efficiency of the rainwater funnel being high or low, and it is difficult to stabilize at the optimal value. The siphonic rainwater funnel drainage reaches the siphon state and goes through five stages: the first stage, wave flow, at the initial stage of rainfall, the amount of rain is small, the water level is low, and the system is at atmospheric pressure; the second stage, pulsating flow, the flow rate increases and the water level rises, the water flow velocity accelerates, and negative pressure appears in the rainwater pipe; the third stage, pulling flow, the flow rate continues to increase, the water level continues to rise, vortices appear on the water surface, and the negative pressure increases; the fourth stage, emulsified flow, the flow velocity in the pipe continues to increase, the negative pressure increases, and the water flow contains a large number of small bubbles; the fifth stage, the suspended pipe reaches full flow, the water flow is rapid and stable, and at this time, the siphon phenomenon is formed, and the drainage efficiency of the siphonic rainwater funnel reaches the highest value.

[0004] Therefore, how to improve the drainage capacity of the garage roof drainage system in the early stage of rainfall and improve its drainage stability has become a problem to be considered by those skilled in the art. Summary of the Invention

[0005] In view of the above deficiencies of the prior art, the technical problem to be solved by the present invention is: how to provide a garage roof drainage method that can improve the early drainage capacity of the garage roof drainage structure and can further utilize other water-collecting ground surfaces to collect rainwater to improve its drainage stability.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A method for draining water from the garage roof, which realizes drainage by setting a siphonic rainwater bucket at the drainage outlet above the garage roof. It is characterized in that during the initial and later stages of rainfall, when the amount of rainwater collected at the drainage outlet is insufficient, make-up water is provided to the vertical drainage pipe below the siphonic rainwater bucket to improve the siphonic drainage effect and drainage efficiency, wherein the make-up water is obtained by filtering the rainwater collected from the water-collecting ground outside the garage roof.

[0008] In this way, the present invention can provide make-up water to the vertical drainage pipe below the siphonic rainwater bucket during the initial and later stages of rainfall when the water volume is insufficient, and utilize the gravity of the make-up water to improve the siphonic effect, so that the drainage efficiency of the siphonic rainwater bucket is improved, and the rainwater collected above the garage roof can be discharged more quickly, avoiding water leakage on the garage roof and improving the anti-leakage stability and reliability of the garage roof. At the same time, the make-up water is obtained by filtering the rainwater collected from other water-collecting grounds outside the garage, fully realizing the reuse of rainwater and not wasting water resources.

[0009] Furthermore, when collecting make-up water, the rainwater is subjected to hierarchical treatment, and the initial rainwater is subjected to fine filtration treatment, while the middle and later stage rainwater is only subjected to coarse filtration treatment.

[0010] In this way, better hierarchical filtration of the collected rainwater can better filter out a large amount of floating dust mixed in the initial rainwater, and at the same time, only coarse filtration is carried out on the middle and later stage rainwater, which can ensure the filtration effect while better improving the filtration efficiency.

[0011] Furthermore, this method is realized by relying on a siphonic drainage system for the garage roof. The siphonic drainage system for the garage roof includes a drainage outlet arranged above the garage roof, a siphonic rainwater bucket is arranged at the drainage outlet, a drainage pipe is connected downward below the siphonic rainwater bucket, and also includes a make-up water storage container. The water inlet end of the make-up water storage container is connected to a rainwater purification device arranged on a rainwater collecting ground outside the garage roof. The lower end of the make-up water storage container is externally connected with a make-up pipe, a make-up control valve is arranged on the make-up pipe, and the outer end of the make-up pipe is connected to the vertical drainage pipe directly below the siphonic rainwater bucket in the drainage pipe.

[0012] In this way, the make-up water storage container is pre-filled with make-up water collected and filtered by the rainwater purification device. At the initial stage of drainage of the siphonic rainwater bucket on a rainy day, when the amount of rainwater is insufficient to form a siphon, the make-up control valve can control the make-up water container to input make-up water into the vertical pipe directly below the siphonic rainwater bucket through the make-up pipe, supplementing water flow to the siphon system to make it better form a downward siphonic effect and improve the early drainage capacity of the siphonic rainwater bucket on the garage roof. At the same time, when the siphonic effect of the siphonic rainwater bucket is not stable enough, make-up water can also be input through the make-up pipe to improve the stability of its siphonic drainage.

[0013] Furthermore, a rainwater collection space for the garage is provided at the lowest part above the garage roof slab with a permeable material, and the siphonic rainwater hopper is installed at the lowest position within the rainwater collection space for the garage.

[0014] In this way, it is more convenient for the rainwater on the garage top to be concentrated and discharged outside through the siphonic rainwater hopper.

[0015] Furthermore, the drain pipe includes a vertical drain pipe directly below each siphonic rainwater hopper, and also includes a main drain pipe connected to each vertical drain pipe, and the main drain pipe is externally connected to the urban drainage system.

[0016] In this way, it is more convenient for the rainwater on the garage top to be discharged outside.

[0017] Furthermore, the rainwater purification device includes a purification container. An inlet is provided at the upper end of the purification container, and a rainwater grate is provided at the inlet. An initial rainwater storage tank is correspondingly provided below the inlet. Vertically downward mid - and late - stage rainwater channels are arranged side by side on the side of the initial rainwater storage tank. A fine - filter packing layer is provided below the initial rainwater storage tank, and a water - collecting space layer is provided below the fine - filter packing layer. The lower ends of the mid - and late - stage rainwater channels communicate with the water - collecting space layer. The upper end of the initial rainwater storage tank has an initial rainwater inlet. A rainwater grading control device is also provided between the initial rainwater inlet and the upper port of the mid - and late - stage rainwater channels. The rainwater grading control device is used to control the initial rainwater to flow into the initial rainwater inlet and the mid - and late - stage rainwater to flow into the mid - and late - stage rainwater channels. A rainwater collection outlet is provided at the lowest part of the water - collecting space layer and is connected to a compensation water storage container.

[0018] In this way, when the rainwater purification device is in use, it is installed at the lowest part of the rainwater collection and water - collecting area on the ground outside the garage roof slab. The rainwater enters from the inlet of the device after being preliminarily filtered by the rainwater grate. Under the action of the rainwater grading control device, the initial rainwater enters the initial rainwater storage tank and is filtered by the fine - filter packing layer below, removing solid particulate impurities such as ground floating dust mixed in the initial rainwater. The cleaner mid - and late - stage rainwater can be controlled to flow out from the mid - and late - stage rainwater channels and finally converge into the water - collecting space layer at the bottom of the container and flow out from the rainwater collection outlet. Therefore, the device can achieve graded filtration, can filter rainwater better, and collect cleaner rainwater. The collected rainwater can be used as siphonic compensation for the garage roof slab, which can better ensure the stability and reliability of the compensation.

[0019] Furthermore, a detachable sewage - intercepting basket is provided below the rainwater grate at the inlet, and a layer of primary - filter packing is arranged in the sewage - intercepting basket.

[0020] In this way, it can better achieve the primary filtration of rainwater and screen out larger ground solid particulate matters washed away by the rainwater.

[0021] Further, a water inlet partition with a relatively low position is arranged right above the initial rainwater storage tank at the position facing the water inlet. A diversion platform with a relatively higher position than the water inlet partition is arranged at the position where the upper part of the initial rainwater storage tank is misaligned with the water inlet and adjacent to the middle and late rainwater channels. The upper end surface of the diversion platform is communicated with the middle and late rainwater channels. The initial rainwater inlet at the upper end of the initial rainwater storage tank is located between the water inlet partition and the diversion platform.

[0022] This can better ensure that the initial rainwater first passes through the water inlet partition and then flows into the initial rainwater storage tank from the initial rainwater inlet. After the initial rainwater storage tank overflows to be flush with the diversion platform, it then flows from the diversion platform into the middle and late rainwater channels. Therefore, it can better avoid the misflow of the initial rainwater into the middle and late rainwater channels.

[0023] Further, the rainwater grading control device includes a grading control sluice gate arranged at the initial rainwater inlet. One end of the grading control sluice gate is rotatably hinged on the water inlet partition at one end of the initial rainwater inlet, and the other end forms a butt joint head and is connected with a pull rope. The other end of the pull rope passes through a roller group arranged in the diversion platform and is connected with a delay water bucket suspended in the middle and late rainwater channels. The self-weight of the grading control sluice gate is greater than the weight of the empty delay water bucket and less than the weight of the delay water bucket after it is filled with water. After the delay water bucket is filled with water, it can pull up the grading control sluice gate and make its butt joint head fit on an arc-shaped butt joint surface arranged on the side of the diversion platform. Leakage holes are arranged at the lower end of the extended water bucket.

[0024] In this way, when the initial rainwater overflows from the initial rainwater storage tank to be flush with the diversion platform, it will first flow from the diversion platform into the delay water bucket in the middle and late rainwater channels. When the delay water bucket is filled with water, it will pull up the grading control sluice gate to close, so that the middle and late rainwater no longer enters the initial rainwater storage tank, achieving the effect of grading control of rainwater flow. After the later rain stops, the water in the delay water bucket slowly leaks out through the leakage holes and flows away, and the grading control sluice gate resets and opens again under the action of its own weight.

[0025] Further, a water blocking bottom plate is also arranged below the initial rainwater storage tank and above the fine filter packing layer. An initial rainwater drain outlet is arranged on the bottom plate. A drain outlet cover is arranged at the upper port of the initial rainwater drain outlet. A tension spring is arranged between the periphery of the drain outlet cover and the bottom plate. An upper end of the drain outlet cover is fixedly connected with a connecting rope. The connecting rope can movably pass upward into the diversion platform and is fixedly connected with the pull rope on the roller group therein. When the pull rope is in the initial state, the connecting rope is in a loose state. When the pull rope pulls up the grading control sluice gate and makes its butt joint head stick to the lower end of the arc-shaped butt joint surface, the connecting rope is in a taut state.

[0026] In this way, the setting of the bottom plate enables the initial rainwater not to filter downward immediately after entering the initial rainwater storage tank. At this time, the drain port cover is in the closed state, which is convenient for the initial rainwater storage tank to store water. When the initial rainwater storage tank is full of water, the rainwater flows from the diversion platform into the delay bucket, and the delay bucket pulls the pull rope downward under its own weight. When the pull rope is in the initial state, the connecting rope is in a loose state. When the pull rope pulls up the grading control gate plate and makes its abutting head stick to the lower end of the arc-shaped abutting surface, the connecting rope is in a taut state. At this time, the grading control gate plate is closed, the delay bucket continues to store water and continues to pull the pull rope. The abutting head of the grading control gate plate moves from sticking to the lower end of the arc-shaped abutting surface to the upper end of the arc-shaped abutting surface. At the same time, the connecting rope overcomes the pulling force of the tension spring to open the drain port cover and start draining water. The initial rainwater flows from the initial rainwater drain port into the fine filter packing layer below for filtration. Finally, after the rain stops, the water in the delay bucket leaks out through the water leakage holes and flows away. Under the action of the self-weight of the grading control gate plate and the pulling force of the tension spring, the pull rope resets, the drain port cover closes, and then the grading control gate plate reopens, waiting for the next rain. Therefore, the automatic control of the initial rainwater entering and leaving the initial rainwater storage tank is realized in this way.

[0027] Furthermore, the abutting head is of an elastic sleeve structure. In this way, it can be more convenient for the abutting head to fit and slide on the arc-shaped abutting surface and maintain the seal.

[0028] Furthermore, there is a gap between the bottom plate and the fine filter packing layer below. In this way, it is convenient for the initial rainwater in the initial rainwater storage tank to quickly drain out and flow away after the drain port cover is opened.

[0029] Furthermore, a ventilation pipe is arranged in the initial rainwater storage tank and communicated with the outside atmosphere. In this way, it is convenient for the initial rainwater to quickly drain out and flow away under the atmospheric pressure after the drain port cover is opened.

[0030] Furthermore, a cylindrical middle and late rainwater drain port is arranged at the lower end of the middle and late rainwater channel, passing through the fine filter packing layer and communicating with the water collection space layer. In this way, it is convenient for the middle and late rainwater to directly flow through the fine filter packing layer into the water collection space layer, and finally flow out from the rainwater collection outlet and enter the compensation water storage container.

[0031] Furthermore, the compensation control valve includes an elastic resistance ball arranged in the compensation pipe, and also includes an air chamber located outside the compensation pipe. A piston is arranged in the middle of the air chamber, and a return spring is connected between the piston and the inner end wall of the air chamber. One end of the air chamber is a holding end and is communicated with the inlet end of the elastic resistance ball, and the other end is an air inlet end and is communicated with the vertical drainage pipe directly below the siphon rain bucket. When the air inlet end of the air chamber is communicated with the atmospheric pressure, the elastic resistance ball is in an expanded state and its periphery is in contact with the inner wall of the compensation pipe.

[0032] In this way, when there is no rainfall, the intake end of the air chamber communicates with the atmosphere through the vertical drainage pipe. Under the holding action of the return spring, the elastic resistance ball is filled with its internal fluid and expands, causing its periphery to adhere to the inner wall of the compensation pipe to form a barrier. The compensation water in the compensation water storage container will not flow out. When it rains, the rainwater runoff on the garage roof converges and flows down from the siphonic rainwater hopper. When the siphon gradually forms in the vertical drainage pipe. At this time, the air pressure in the vertical drainage pipe decreases while the water pressure has not increased yet, and the air pressure at the intake end of the air chamber decreases, causing the piston to slide towards the intake end. The fluid in the elastic resistance ball is sucked into the holding end of the air chamber, and the elastic resistance ball shrinks, causing the compensation control valve to open automatically. The compensation water can pass through the compensation pipe to achieve pressure compensation for the vertical drainage pipe. When the rainfall stabilizes for a period of time, the drainage volume of the siphonic rainwater hopper increases, the water pressure in the vertical drainage pipe increases and is sufficient to form siphonic drainage and balance with the atmospheric pressure. At this time, the piston automatically resets under the action of the return spring, and the compensation control valve automatically closes, and the compensation water in the compensation water storage container no longer flows out. Until the rain stops, as the accumulated rainwater is gradually drained out, the water volume in the vertical drainage pipe decreases again, resulting in a lower pressure. At this time, based on the same principle, the compensation control valve opens automatically again to replenish water to the vertical drainage pipe, improving the siphon effect to enhance the drainage efficiency of the siphonic rainwater hopper for the residual rainwater. Until the siphonic rainwater hopper completely drains the rainwater on the garage roof, the intake end of the air chamber is completely communicated with the atmosphere, the piston resets again, and the compensation control valve automatically closes, and the compensation water in the compensation water storage container no longer flows out. Therefore, the automatic compensation structure formed by the above compensation control valve can achieve automatic compensation control of the compensation water according to the pressure change in the vertical drainage pipe. Without external power, it saves costs and better improves the working stability and reliability. Of course, during implementation, an electrically controlled compensation control valve can also be used to achieve automatic control, but this will cost more.

[0033] Further, the fluid in the elastic resistance ball is a liquid.

[0034] After specific verification, due to the fact that the liquid itself has a certain gravity, using a liquid for control can have better fluidity, can be more conveniently adjusted to the required dynamic equilibrium state, and improve the stability of the control process.

[0035] Further, a flexible soft bag is also filled and arranged at the holding end of the air chamber, and the flexible soft bag is sealed and communicated with the inlet end of the elastic resistance ball.

[0036] In this way, the flexible soft bag is filled and arranged at the holding end of the air chamber so that its outer end can fit and be stressed with the piston. At the same time, the fluid in the elastic resistance ball flows sealed between the flexible soft bag and the elastic resistance ball, avoiding leakage from the piston. Therefore, the stability of the expansion and contraction of the elastic resistance ball can be better guaranteed, and the reliability of the start and stop of the compensation control valve can be better guaranteed.

[0037] Further, the return spring is installed between the piston and the air inlet end of the air chamber. In this way, it is possible to better keep the return spring from contacting the flexible soft bag, without affecting the flow of the fluid in the elastic resistance ball, and better maintain the service life and working stability.

[0038] Further, the air inlet end of the air chamber is connected to the vertical drainage pipe through an obliquely downward connecting pipe. In this way, it is possible to better prevent rainwater from being sucked back into the air chamber to cause damage.

[0039] Further, an anti-backflow partition that is vertically offset and has an inner end inclined towards the vertical drainage pipe is provided in the obliquely downward connecting pipe. In this way, it is possible to better prevent rainwater from being sucked back into the air chamber to cause damage when a large amount of rainwater drains downward, enabling the connecting pipe to mainly transmit air pressure and blocking the transmission of water pressure in an excessive state, and better ensuring the working stability of the compensation control valve.

[0040] Further, the upper end of the upper anti-backflow partition is rotatably arranged on the inner wall of the connecting pipe, and the lower end of the upper anti-backflow partition is adjacent to the lower anti-backflow partition close to the air chamber.

[0041] In this way, when the rainfall is excessive and the large amount of rainwater drains downward, causing excessive water pressure, the water flow is pressed into the connecting pipe and can impact the upper anti-backflow partition to rotate backward, and the lower end of the upper anti-backflow partition and the lower anti-backflow partition close to the air chamber are attached to form a closure. In this way, it is possible to prevent rainwater from entering the air chamber to the greatest extent and maintain the working stability and reliability of the air chamber. Further, the position where the lower edge of the lower end of the upper anti-backflow partition is used to adhere to the lower anti-backflow partition is made of a flexible elastic material (preferably a rubber material). In this way, when the upper anti-backflow partition is impacted by rainwater, it can better adhere to the lower anti-backflow partition to form a seal.

[0042] In summary, the present invention has the advantages of being able to collect and utilize rainwater to improve the early drainage capacity of the garage roof drainage structure and improve its drainage stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of the garage roof siphon drainage system adopted by the present invention.

[0044] Figure 2 For Figure 1 The enlarged structural schematic diagram of the separate compensation control valve in

[0045] Figure 3 For Figure 2 The enlarged structural schematic diagram of the separate connecting pipe in

[0046] Figure 4 For Figure 1Schematic enlarged structure diagram of the separate rainwater purification device in the [device name]. Detailed implementation manners

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and the optimal implementation manners.

[0048] Optimal implementation manner: A method for draining water from the garage roof. A siphonic rainwater bucket is arranged at the drainage outlet above the garage roof to achieve drainage. The feature is that in the initial and later stages of rainfall, when the rainwater volume collected at the drainage outlet is insufficient, make-up water is provided to the vertical drainage pipe below the siphonic rainwater bucket to improve the siphonic drainage effect and drainage efficiency. The make-up water is obtained by filtering the rainwater collected from the water collecting ground outside the garage roof.

[0049] In this way, the present invention can provide make-up water to the vertical drainage pipe below the siphonic rainwater bucket when the water volume is insufficient in the initial and later stages of rainfall, and utilize the gravity of the make-up water to improve the siphonic effect, so that the drainage efficiency of the siphonic rainwater bucket is improved, and the rainwater collected above the garage roof can be discharged more quickly, avoiding water leakage on the garage roof and improving the anti-leakage stability and reliability of the garage roof. At the same time, the make-up water is obtained by filtering the rainwater collected from other water collecting grounds outside the garage, fully realizing the reuse of rainwater and not wasting water resources.

[0050] During implementation, when collecting make-up water, the rainwater is subjected to hierarchical treatment. The initial rainwater is subjected to fine filtration treatment, and the middle and later stage rainwater is only subjected to coarse filtration treatment.

[0051] In this way, better hierarchical filtration of the collected rainwater can better filter out a large amount of floating dust mixed in the initial rainwater. At the same time, only coarse filtration is performed on the middle and later stage rainwater, which can ensure the filtration effect while better improving the filtration efficiency.

[0052] Specifically, when implementing this method, use Figures 1-4 A siphonic drainage system for the garage roof shown in the figure is implemented. The siphonic drainage system for the garage roof includes a drainage outlet arranged above the garage roof. A siphonic rainwater bucket 1 is arranged at the drainage outlet. A drainage pipe is connected downward below the siphonic rainwater bucket 1. Among them, it further includes a make-up water storage container 2. The water inlet end of the make-up water storage container is connected to a rainwater purification device arranged on a rainwater collecting ground outside the garage roof. The lower end of the make-up water storage container 2 is externally connected with a make-up pipe 3. A make-up control valve 4 is arranged on the make-up pipe 3. The outer end of the make-up pipe 3 is connected to the vertical drainage pipe 5 located directly below the siphonic rainwater bucket 1 in the drainage pipe.

[0053] In this way, the compensation water storage container stores and filters the collected compensation water in advance by relying on the rainwater purification device. When the rainwater volume is insufficient to form a siphon at the initial stage of drainage of the siphon rainwater bucket on a rainy day, the compensation control valve can control the compensation water container to input compensation water into the vertical pipe directly below the siphon rainwater bucket through the compensation pipe, so as to supplement the water flow for the siphon system, make it better form a downward siphon effect, and improve the early drainage capacity of the siphon rainwater bucket on the garage roof. At the same time, when the siphon effect of the siphon rainwater bucket is not stable enough, compensation water can also be input through the compensation pipe to improve the stability of its siphon drainage.

[0054] Among them, a garage rainwater collection space 6 is arranged at the lowest position above the garage roof by using a permeable material, and the siphon rainwater bucket 1 is installed at the lowest position in the garage rainwater collection space 6.

[0055] In this way, it is more convenient for the rainwater on the garage top to be concentrated and discharged outside through the siphon rainwater bucket.

[0056] Among them, the drain pipe includes a vertical drain pipe 5 directly below each siphon rainwater bucket, and also includes a main drain pipe 7 connected to each vertical drain pipe. The main drain pipe 7 is externally connected to the urban drainage system.

[0057] In this way, it is more convenient for the rainwater on the garage top to be discharged outside.

[0058] Furthermore, the rainwater purification device (see Figure 4 ) includes a purification container 21. The upper end of the purification container 21 is provided with a water inlet 22, and a rainwater grate 23 is arranged at the water inlet 22. Among them, an initial rainwater storage tank 24 is correspondingly arranged below the water inlet. Vertically downward middle and late stage rainwater channels 25 are arranged in parallel on the side of the initial rainwater storage tank 24. A fine filter packing layer 26 is arranged below the initial rainwater storage tank 24, and a water collection space layer 27 is arranged below the fine filter packing layer 26. The lower ends of the middle and late stage rainwater channels 25 communicate with the water collection space layer 27. The upper end of the initial rainwater storage tank has an initial rainwater inlet 28. It also includes a rainwater grading control device arranged between the initial rainwater inlet and the upper port of the middle and late stage rainwater channels. The rainwater grading control device is used to control the initial rainwater to flow into the initial rainwater inlet and the middle and late stage rainwater to flow into the middle and late stage rainwater channels. A rainwater collection and outlet 45 is arranged at the lowest position of the water collection space layer and is connected to the compensation water storage container 2.

[0059] In this way, when the rainwater purification device is in use, it is installed at the lowest point of the rainwater collection and converging area on the ground outside the garage roof. After being preliminarily filtered by the rainwater grate, the rainwater enters from the water inlet of the device. Under the action of the rainwater grading control device, the initial rainwater enters the initial rainwater storage tank and is filtered through the fine filter packing layer below to remove solid particulate impurities such as ground floating dust mixed in the initial rainwater. The cleaner middle and late stage rainwater can be controlled to flow out from the middle and late stage rainwater channel, and finally converge to the water collection space layer at the bottom of the container, and finally flow out from the rainwater collection water outlet. Therefore, the device can achieve grading filtration, better filter rainwater, and collect cleaner rainwater. The collected rainwater can be used as the siphon compensation for the garage roof, which can better ensure the stability and reliability of the compensation.

[0060] Among them, a detachable sewage intercepting basket 29 is also provided at the water inlet 22 below the rainwater grate. A layer of primary filter packing 30 is arranged in the sewage intercepting basket 29.

[0061] In this way, the primary filtration of rainwater can be better achieved, and larger ground solid particulate matters washed away by the rainwater can be screened out.

[0062] Among them, a relatively low water inlet partition plate 31 is arranged above the initial rainwater storage tank 24 directly opposite the water inlet. A diversion platform 32 with a relatively higher position than the water inlet partition plate is arranged at the position where the upper part of the initial rainwater storage tank is misaligned with the water inlet and adjacent to the middle and late stage rainwater channel 25. The upper end surface of the diversion platform 32 is communicated with the middle and late stage rainwater channel. The initial rainwater inlet 28 at the upper end of the initial rainwater storage tank is located between the water inlet partition plate 31 and the diversion platform 32.

[0063] In this way, it can be better ensured that the initial rainwater first passes through the water inlet partition plate and then flows into the initial rainwater storage tank from the initial rainwater inlet. After the initial rainwater storage tank overflows to be flush with the diversion platform, it then flows into the middle and late stage rainwater channel from the diversion platform. Therefore, it can better avoid the misflow of the initial rainwater into the middle and late stage rainwater channel.

[0064] Among them, the rainwater grading control device includes a grading control gate plate 33 arranged at the initial rainwater inlet. One end of the grading control gate plate 33 is rotatably hinged to the water inlet partition plate 31 at one end of the initial rainwater inlet. The other end forms a butt joint head 34 and is connected with a pull rope 35. The other end of the pull rope 35 passes through the roller group 36 arranged in the diversion platform and is connected with a delay water bucket 37 suspended in the middle and late stage rainwater channel. The self-weight of the grading control gate plate is greater than the weight of the empty delay water bucket and less than the weight of the delay water bucket after being filled with water. After the delay water bucket is filled with water, it can pull up the grading control gate plate and make its butt joint head fit on an arc-shaped butt joint surface 38 arranged on the side of the diversion platform. Leakage holes are arranged at the lower end of the extended water bucket.

[0065] In this way, when the initial rainwater overflows from the initial rainwater storage tank and reaches the same level as the diversion platform, it will first flow from the diversion platform into the delay bucket in the middle and late stage rainwater channel. When the delay bucket is filled with water, the step control gate is pulled up and closed, so that the middle and late stage rainwater no longer enters the initial rainwater storage tank, achieving the effect of step control of rainwater flow. After the late stage rainwater stops, the water in the delay bucket slowly leaks out through the water leakage holes and flows away, and the step control gate is reopened and reset under its own weight.

[0066] Among them, a water blocking bottom plate 39 is further arranged below the initial rainwater storage tank 24 and above the fine filter packing layer 26. An initial rainwater drain port 40 is arranged on the bottom plate 39. A drain port cover is arranged at the upper port of the initial rainwater drain port 40. A tension spring 42 is arranged between the periphery of the drain port cover and the bottom plate. An upper end of the drain port cover is fixedly connected with a connecting rope 43. The connecting rope 43 is movably penetrated upward into the diversion platform 32 and fixedly connected with a pull rope 35 on a roller set 36 therein. When the pull rope is in the initial state, the connecting rope is in a loose state. When the pull rope pulls up the step control gate and makes its abutting head abut against the lower end of the arc-shaped abutting surface, the connecting rope is in a taut state.

[0067] In this way, the setting of the bottom plate enables the initial rainwater not to filter downward immediately after entering the initial rainwater storage tank. At this time, the drain port cover is in a closed state, which is convenient for the initial rainwater storage tank to store water. When the initial rainwater storage tank is filled with water, the rainwater flows from the diversion platform into the delay bucket, and the delay bucket pulls the pull rope downward under its own weight. When the pull rope is in the initial state, the connecting rope is in a loose state. When the pull rope pulls up the step control gate and makes its abutting head abut against the lower end of the arc-shaped abutting surface, the connecting rope is in a taut state. At this time, the step control gate is closed, the delay bucket continues to store water and continues to pull the pull rope, and the abutting head of the step control gate moves from abutting against the lower end of the arc-shaped abutting surface to the upper end of the arc-shaped abutting surface. At the same time, the connecting rope overcomes the tension of the tension spring to open the drain port cover and start draining water, and the initial rainwater flows from the initial rainwater drain port into the lower fine filter packing layer for filtration. Finally, after the rain stops, the water in the delay bucket leaks out through the water leakage holes and flows away. Under the action of the self-weight of the step control gate and the tension of the tension spring, the pull rope is reset, the drain port cover is closed, and then the step control gate is reopened to wait for the next rain. Therefore, the automatic control of the initial rainwater entering and leaving the initial rainwater storage tank is realized in this way.

[0068] Among them, the abutting head 34 is of an elastic sleeve structure. In this way, it is more convenient for the abutting head to fit and slide on the arc-shaped abutting surface and maintain sealing.

[0069] Among them, the bottom plate 39 and the lower fine filter packing layer 26 are arranged at intervals. In this way, it is convenient for the initial rainwater in the initial rainwater storage tank to quickly drain out and flow away after the drain port cover is opened.

[0070] Among them, a vent pipe is arranged in the initial rainwater storage tank and communicated with the outside atmosphere (not shown in the figure). In this way, it is convenient for the initial rainwater to quickly drain out and flow away under the atmospheric pressure after the drain port cover is opened.

[0071] Among them, a cylindrical middle and late rainwater drain port 44 is arranged at the lower end of the middle and late rainwater channel 25 and communicated with the water collection space layer through the fine filter packing layer. In this way, it is convenient for the middle and late rainwater to directly flow through the fine filter packing layer into the water collection space layer, and finally flow out from the rainwater collection outlet and enter the compensation water storage container.

[0072] Among them, the compensation control valve 4 includes an elastic resistance ball 12 arranged in the compensation pipe, and also includes an air chamber 13 located outside the compensation pipe. A piston 14 is arranged in the middle of the air chamber. A return spring 15 is connected between the piston and the inner end wall of the air chamber. One end of the air chamber 13 is a holding end and is communicated with the inlet end of the elastic resistance ball. The other end is an air inlet end and is communicated with the vertical drain pipe 5 directly below the siphon rainwater bucket 1. When the air inlet end of the air chamber 13 is communicated with the atmospheric pressure, the elastic resistance ball 12 is in an expanded state and its periphery is in contact with the inner wall of the compensation pipe.

[0073] In this way, when there is no rainfall, the intake end of the air chamber communicates with the atmosphere through the vertical drainage pipe. Under the holding action of the return spring, the elastic resistance ball is filled with its own internal fluid to an expanded state, and its periphery is in contact with the inner wall of the compensation pipe to form a barrier. The compensation water in the compensation water storage container will not flow out. When it rains, the rainwater runoff on the garage roof converges and flows down from the siphonic rainwater hopper. When the siphon gradually forms in the vertical drainage pipe. At this time, the air pressure in the vertical drainage pipe decreases while the water pressure has not increased yet, and the air pressure at the intake end in the air chamber decreases, causing the piston to slide towards the intake end. The fluid in the elastic resistance ball is sucked into the holding end of the air chamber, and the elastic resistance ball shrinks, causing the compensation control valve to automatically open. The compensation water can pass through the compensation pipe to achieve pressure compensation for the vertical drainage pipe. When the rainfall stabilizes for a period of time, the drainage volume of the siphonic rainwater hopper increases, the water pressure in the vertical drainage pipe increases and is sufficient to form siphonic drainage and balance with the atmospheric pressure. At this time, the piston automatically resets under the action of the return spring, and the compensation control valve automatically closes, and the compensation water in the compensation water storage container no longer flows out. Until the rain stops, as the accumulated rainwater is gradually discharged, the water volume in the vertical drainage pipe decreases again, resulting in a lower pressure. At this time, based on the same principle, the compensation control valve automatically opens again to replenish water to the vertical drainage pipe, improving the siphon effect to improve the drainage efficiency of the siphonic rainwater hopper for the remaining rainwater. Until the siphonic rainwater hopper completely drains the rainwater on the garage roof, the intake end of the air chamber is completely in communication with the atmosphere, the piston resets again, and the compensation control valve automatically closes, and the compensation water in the compensation water storage container no longer flows out. Therefore, the automatic compensation structure formed by the above-mentioned compensation control valve can realize the automatic compensation control of the compensation water according to the pressure change in the vertical drainage pipe. Without external power, it saves costs and better improves the working stability and reliability. Of course, during implementation, an electronically controlled compensation control valve can also be used to achieve automatic control, but this will cost more.

[0074] Among them, the fluid in the elastic resistance ball 12 is a liquid.

[0075] After specific verification, due to the fact that the liquid itself has a certain gravity, using a liquid for control can have better fluidity, can be more conveniently adjusted to the required dynamic balance state, and improve the stability of the control process.

[0076] Among them, a flexible soft bag 18 is also filled and arranged at the holding end of the air chamber, and the flexible soft bag 18 is hermetically connected to the inlet end of the elastic resistance ball 12.

[0077] In this way, the flexible soft bag is filled and arranged at the holding end of the air chamber so that its outer end can be in contact with the piston to receive force. At the same time, the fluid in the elastic resistance ball flows hermetically between the flexible soft bag and the elastic resistance ball, avoiding leakage from the piston. Therefore, the stability of the expansion and contraction of the elastic resistance ball can be better guaranteed, and the reliability of the start and stop of the compensation control valve can be better guaranteed.

[0078] Among them, the return spring 15 is installed between the piston and the air inlet end of the air chamber. In this way, it can better ensure that the return spring does not contact the flexible soft bag, does not affect the flow of the fluid in the elastic resistance ball, and better maintains the service life and working stability.

[0079] Among them, the air inlet end of the air chamber 13 is connected to the vertical drainage pipe through an obliquely downward connecting pipe 16. In this way, it can better prevent rainwater from being sucked back into the air chamber to cause damage.

[0080] Among them, an anti-backflow partition 17 which is arranged with upper and lower displacements and the inner end thereof is inclined towards the vertical drainage pipe is further arranged in the obliquely downward connecting pipe 16. In this way, it can better prevent rainwater from being sucked back into the air chamber to cause damage when a large amount of rainwater drains downward, so that the connecting pipe mainly transmits air pressure, and can block the water pressure transmission in the excessive state, and better ensure the working stability of the compensation control valve.

[0081] Among them, the upper end of the upper anti-backflow partition is rotatably arranged on the inner wall of the connecting pipe 16, and the lower end of the upper anti-backflow partition is adjacent to the lower anti-backflow partition close to the air chamber.

[0082] In this way, when the rainfall is too large and the water pressure is too high due to a large amount of rainwater draining downward, the water flow can impact the upper anti-backflow partition to rotate backward after being pressed into the connecting pipe, and the lower end of the upper anti-backflow partition and the lower anti-backflow partition close to the air chamber are attached to form a closure, so as to prevent rainwater from entering the air chamber to the greatest extent and maintain the working stability and reliability of the air chamber. Further, the position where the lower end edge of the upper anti-backflow partition is used to be attached to the lower anti-backflow partition is made of a flexible elastic material 19 (preferably a rubber material). In this way, when the upper anti-backflow partition is impacted by rainwater, it can better fit with the lower anti-backflow partition to form a seal.

Claims

1. A drainage method for a garage roof slab, which realizes drainage by setting a siphonic rainwater bucket at the drainage outlet above the garage roof slab. Characterized in that, In the initial and later stages of rainfall, when the amount of rainwater collected at the drainage outlet is insufficient, make-up water is provided to the vertical drainage pipe below the siphonic rainwater bucket to improve the siphonic drainage effect and drainage efficiency, wherein the make-up water is obtained by filtering the rainwater collected from the water-collecting ground outside the garage roof slab. This method is realized by a siphonic drainage system for a garage roof slab. The siphonic drainage system for a garage roof slab includes a drainage outlet arranged above the garage roof slab, a siphonic rainwater bucket is arranged at the drainage outlet, a drainage pipe is connected downward below the siphonic rainwater bucket, and also includes a make-up water storage container. The water inlet end of the make-up water storage container is connected to a rainwater purification device arranged on a rainwater-collecting ground outside the garage roof slab. The lower end of the make-up water storage container is externally connected with a make-up pipe, a make-up control valve is arranged on the make-up pipe, and the outer end of the make-up pipe is connected to the vertical drainage pipe directly below the siphonic rainwater bucket in the drainage pipe. The make-up control valve includes an elastic resistance ball arranged in the make-up pipe, and also includes an air chamber outside the make-up pipe. A piston is arranged in the middle of the air chamber. A return spring is connected between the piston and the inner end wall of the air chamber. One end of the air chamber is a holding end and is communicated with the inlet end of the elastic resistance ball. The other end is an air inlet end and is communicated with the vertical drainage pipe directly below the siphonic rainwater bucket. When the air inlet end of the air chamber is communicated with the atmospheric pressure, the elastic resistance ball is in an expanded state and its periphery is in contact with the inner wall of the make-up pipe.

2. The drainage method for a garage roof slab according to claim 1, Characterized in that, When collecting the make-up water, the rainwater is subjected to hierarchical treatment. The initial rainwater is subjected to fine filtration treatment, and the middle and later rainwater is only subjected to coarse filtration treatment.

3. The drainage method for a garage roof slab according to claim 1, Characterized in that, A garage rainwater-collecting space is arranged at the lowest position above the garage roof slab by using a permeable material, and the siphonic rainwater bucket is installed at the lowest position in the garage rainwater-collecting space.

4. The drainage method for a garage roof slab according to claim 3, Characterized in that, The drainage pipe includes a vertical drainage pipe directly below each siphonic rainwater bucket, and also includes a main drainage pipe connected to each vertical drainage pipe. The main drainage pipe is externally connected to the urban drainage system.

5. The drainage method for a garage roof slab according to claim 1, Characterized in that, The rainwater purification device includes a purification container. An inlet is provided at the upper end of the purification container, and a rainwater grate is arranged at the inlet. Correspondingly, an initial rainwater storage tank is provided below the inlet. Vertically downward mid-late stage rainwater channels are arranged side by side on the side of the initial rainwater storage tank. A fine filtration packing layer is provided below the initial rainwater storage tank, and a water collecting space layer is provided below the fine filtration packing layer. The lower ends of the mid-late stage rainwater channels communicate with the water collecting space layer. The upper end of the initial rainwater storage tank has an initial rainwater inlet. A rainwater grading control device is further included between the initial rainwater inlet and the upper port of the mid-late stage rainwater channel. The rainwater grading control device is used to control the initial rainwater to flow into the initial rainwater inlet and the mid-late stage rainwater to flow into the mid-late stage rainwater channels. A rainwater collection outlet is provided at the lowest point of the water collecting space layer and is connected to a compensation water storage container.

6. The garage roof drainage method according to claim 5, characterized in that, a detachable sewage interception basket is further provided below the rainwater grate at the inlet, and a layer of primary filtration packing is arranged in the sewage interception basket; a relatively low inlet partition board is arranged directly opposite the inlet at the upper part of the initial rainwater storage tank. A diversion platform with a relatively higher position than the inlet partition board is arranged at the upper part of the initial rainwater storage tank where it is misaligned with the inlet and adjacent to the mid-late stage rainwater channels. The upper surface of the diversion platform is communicated with the mid-late stage rainwater channels. The initial rainwater inlet at the upper end of the initial rainwater storage tank is located between the inlet partition board and the diversion platform; The rainwater grading control device includes a grading control gate plate arranged at the initial rainwater inlet. One end of the grading control gate plate is rotatably hinged to the inlet partition board at one end of the initial rainwater inlet, and the other end forms a butt joint head and is connected with a pull rope. The other end of the pull rope passes through a roller group arranged in the diversion platform and is connected with a delay water bucket suspended in the mid-late stage rainwater channel. The self-weight of the grading control gate plate is greater than the weight of the empty delay water bucket and less than the weight of the delay water bucket after it is filled with water. After the delay water bucket is filled with water, it can pull up the grading control gate plate and make its butt joint head fit on an arc-shaped butt joint surface arranged on the side of the diversion platform. A water leakage hole is arranged at the lower end of the delay water bucket; A bottom plate for blocking water is further arranged above the fine filtration packing layer below the initial rainwater storage tank. An initial rainwater drain outlet is arranged on the bottom plate. A drain outlet cover is arranged at the upper port of the initial rainwater drain outlet. A tension spring is arranged between the periphery of the drain outlet cover and the bottom plate. An upper end of the drain outlet cover is fixedly connected with a connecting rope. The connecting rope is movably inserted upward into the diversion platform and is fixedly connected with the pull rope on the roller group therein. When the pull rope is in the initial state, the connecting rope is in a loose state. When the pull rope pulls up the grading control gate plate and makes its butt joint head stick to the lower end of the arc-shaped butt joint surface, the connecting rope is in a taut state.

7. The garage roof drainage method according to claim 1, characterized in that, the fluid in the elastic resistance ball is liquid; A flexible soft bag is further filled and arranged at the holding end of the air chamber, and the flexible soft bag is hermetically communicated with the inlet end of the elastic resistance ball.

8. The garage roof drainage method according to claim 1, characterized in that, the return spring is installed between the piston and the air inlet end of the air chamber.

9. The garage roof drainage method according to claim 1, characterized in that, the air inlet end of the air chamber is connected to the vertical drainage pipe through an obliquely downward connecting pipe; an anti-backflow partition arranged with upper and lower displacements and inclinations is further arranged in the obliquely downward connecting pipe; the upper end of the anti-backflow partition located above is rotatably arranged on the inner wall of the connecting pipe, and the lower end of the anti-backflow partition located above is adjacent to the anti-backflow partition located below in the direction close to the air chamber.

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