CN112815099A

CN112815099A - Drainage flood fighting valve

Info

Publication number: CN112815099A
Application number: CN202110242541.5A
Authority: CN
Inventors: 潘泉方
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-28
Filing date: 2021-03-01
Publication date: 2021-05-18
Also published as: CN112815099A8

Abstract

The invention discloses a flood drainage and flood fighting valve, which is provided with a valve body pipe barrel part and comprises: the valve body pipe barrel part is of a structure fixed with the movable hinge component by welding, the movable hinge component and the valve part are of a structure fixed by welding, and an integral complete product is manufactured; the complete product is suitable for underground pipe network main branch pipes or main pipeline water outlets for rainwater drainage on municipal roads in a certain urban area, and when flood occurs, the acting force of hydraulic potential pressure difference naturally generated inside and outside the 'valve' or the gravity of the self weight of the valve part in the no-rain period automatically opens or closes the W-shaped flange on the valve part to achieve the purposes of drainage and flood resistance.

Description

Drainage flood fighting valve

Technical Field

The invention relates to a flood drainage and resistance valve, in particular to a device which is suitable for a planned urban area and causes flood accumulation and disaster when suffering from actual attack of rainstorm or extra heavy rainstorm, scientifically plans and builds a thousand-year water conservancy underground piping network project by utilizing the peripheral boundary of an embankment leading to rivers, lakes, seas and rivers, automatically opens and closes the valve by utilizing the potential energy (namely water energy pressure difference) generated by natural phenomena, and is arranged on the water outlet of a main or branch pipeline of an underground pipe network for draining rainwater on urban municipal roads to absorb and drain the rainwater in the flood, so that 'city sea watching' is changed into 'sponge city', and the device is an automatic flood drainage and resistance valve.

Background

Valves in widespread use today, such as: the conventional valves of gate valves, butterfly valves, ball valves, etc., have the following disadvantages: in the embodiment, the opening and the closing are operated by manual operation; the device is easy to freeze and damage in winter and open air, has complex mechanism and inconvenient installation and maintenance or is easy to damage; high cost, etc.

For another example, the intelligent electric valves widely used at present have the following disadvantages: in the embodiment, the intelligent controller is required to be used for carrying out electric operation and manual maintenance management when the intelligent controller is started and closed; installation and maintenance are inconvenient or easily damaged; investment costs are also high, etc.

For example, chinese patent publication No.: CN 202577570U discloses an automatic waste fitting discharging of municipal road surface moth-proofing, the purpose of the invention is to provide an automatic waste fitting discharging of municipal road surface moth-proofing that can prevent the interior biology of sewer from running out and completely cut off the foul smell, characterized by that: the inner wall of the drainage port of the main body 1 is provided with a switch valve plate 5, the tail end of the switch valve plate 5 is provided with a hinge hinged with a switch valve fixing plate 2, the switch valve fixing plate 2 is fixed on the main body 1 through a fixing screw 3, and the hinge part of the switch valve plate 5 is provided with an automatic return hammer 4; at least two water outlets are distributed on the main body 1 in parallel; the invention is mainly used for a sewer opening sealing device in public facilities; in conclusion, the invention discloses a switch valve plate 5, … … … and the like arranged on the inner wall of a manhole cover at a sewer hole of a municipal road surface rainwater drainage inspection wellhead (namely, a rectangular wellhead is vertically arranged or a rectangular wellhead is arranged parallel to the ground); the rainwater drainage inspection well at the rainwater drainage port of the municipal road surface is provided with a well ring of a concrete structure or a cast iron structure (the two most common structural forms) firstly, and then a main body 1, such as a well cover of the cast iron structure, is arranged in the well ring, so that a complete sewer port of a public facility can be formed; therefore, the invention, in the abstract and the specification, is as follows: in the block diagrams of fig. 1, 2, 3, 4 and 5, the cause and effect relationship of the block diagram between the body part and the associated further parts is not clear and reasonable. Another example is (a): the invention is characterized in that in the abstract attached drawings and the specification attached drawings: in fig. 1, 2, 3, 4: the main body 1 is: a rectangular well ring which is a component in the rainwater drainage inspection well at the rainwater drainage port of the municipal road surface; whereas in fig. 5: the main body 1 is indeed: a rectangular well cover which is a component in a rainwater drainage inspection well at a rainwater drainage port of a municipal road surface; according to the invention, only on the inner wall of the rectangular well lid, the following components are additionally arranged: the tail ends of the switch valve plate 5 and the switch valve plate 5 are provided with hinge hinges hinged with the switch valve fixing plate 2, the switch valve fixing plate 2 is fixed on the main body 1 through fixing screws 3, and the hinge parts of the switch valve plate 5 are provided with four components of an automatic return hammer 4, so that a valve cannot be formed; wherein, the switch valve plate 5 as a component is also just a 'gravity return flap baffle' which is used for sealing and blocking smaller organisms from climbing out of a sewer; another example is (b): the invention is characterized in that in the abstract attached drawings and the specification attached drawings: in the structure diagrams of fig. 1, 2, 3 and 4, the number of the important part of the hinge and the description of the structure drawings are lacked, and the like; another example is (iii): the invention is characterized in that in the abstract attached drawings and the specification attached drawings: in the block diagrams of fig. 1, 2, 3, 4 and 5: the arrangement of this important component of the self-return hammers 4, in particular the inspection of rectangular wellheads in rainwater drains arranged parallel to the ground, does not have exactly the position and number of arrangement at all; the cause and effect relationship of the structural diagram between the shown main body part and the related other parts is not reasonable and clear; another example is (four): in the implementation of the invention, in the abstract attached drawings and the specification attached drawings: in the block diagrams of fig. 1, 2, 3, 4 and 5: when the water runs out, the switch valve returns to the original position under the action of the self gravity of the automatic return hammer 4 to seal the sewer so as to place the small organisms to climb out of the sewer, and the working principle of the device is as follows: the mechanical principle of the action of the fulcrum and the lever of the force and arm of force; however, in the structure of fig. 5, the geometry of the drainage openings (at least two parallel openings are located on the main body) is: the structural form of the long waist sub-eye orifice, when the geometric shape of the long waist sub-eye orifice of a group of water outlets is narrow and long, because one side on the central axis in fig. 5 is provided with a switch valve plate 5, the tail end of the switch valve plate 5 is provided with a hinge hinged with a switch valve fixing plate 2, the switch valve fixing plate 2 is fixed on a main body 1 through a fixing screw 3, when the hinge part of the switch valve plate 5 is provided with an automatic return hammer 4, namely in the structural form of fig. 5, a narrow and long force arm is formed, the self gravity of the automatic return hammer 4 exerts force inefficiently, and the narrow and long waist sub-eye orifice is difficult to reach: the purpose of the action of the fulcrum and the lever of the force and arm of force; in summary, the main constituents of the present invention have the following problems and disadvantages: when the technical scheme is implemented, the important part of the automatic return hammer 4 is lacked, and the switch valve plate 5 loses the practical function; thus, the present invention, in solving the basic structure of the device structure and the embodiment of the invention, and the technical solution and the related before and after cause and effect relationship of the structure are contradictory, lacks the basic logical property ….

Another example is chinese patent publication No.: CN 202090429U discloses a balance weight type flap valve, the invention aims to provide a balance weight type flap valve device which utilizes the working principle of a link mechanism to reset and close the outlet of a pipeline and protect the inside of the pipeline to be clean and safe; the main working principle is as follows: when the pressure of the liquid in the pipelines 8 and 9 is accumulated, the flap valve 7 pushes the liquid out of the pipeline; when the liquid in the pipelines 8 and 9 is exhausted to the outside of the pipeline, the components 3, 4, 5 and 6 in the link mechanism start to work, the flap valve 7 is pressed to reset to close the outlet of the pipeline, and the aims of protecting the inside of the pipelines 8 and 9 to be clean and safe and preventing the outside organisms from invading are fulfilled; in summary, the main structure of the device has the following problems and disadvantages: when the technical scheme is implemented, as long as the following components are lacked: one of the important parts 3, 4, 5, 6 in the linkage mechanism is that the linkage mechanism can not work normally, and the flap door 7 will break down … ….

At present, China still always encounters actual rainstorm or extra heavy rainstorm in many world regions year by year, and a few regions or an urban flood discharge system cannot react timely or is out of control, so that urban and rural waterlogging is caused, the 'waterfall' scene of sea and lake in urban areas is caused, house water inflow in residential areas and engine damage caused by vehicle submergence are caused, and civil aviation, high-speed rail, subway, highway and the like are greatly influenced.

With the government, the green low-carbon production mode, development mode and life mode are promoted to be formed, which is a necessary requirement for implementing new development theory, and ensures good ecological environment: the building block becomes a growing point of people's life, a supporting point of sustainable and healthy development of economy and society, and a force point showing good images; insist on the general scientific planning of the construction of the urban and rural areas which are active, stable and regular, follow the comprehensive development management and treatment requirements of laws, regulations and standardization, … …, dedicate nature and follow the natural law, and the like; the following principles are grasped: firstly, people-oriented is insisted on, and fair sharing development is emphasized; secondly, the method insists on intensive and efficient effects and pays attention to ecological civilization and environmental protection; thirdly, insisting on the overall planning of urban and rural areas and paying attention to the development quality innovation; fourthly, the people insist on the conditions according to the local conditions and pay attention to the reasonable and scientific layout, and the like.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a flood drainage and fighting valve, which adopts the technical scheme that a valve body pipe barrel part is provided, and the flood drainage and fighting valve comprises: the valve body pipe barrel part is of a structure fixed with the movable hinge component by welding, the movable hinge component and the valve part are of a structure fixed by welding, and an integral complete product is manufactured; the movable hinge member has a long shaft string rod, and the long shaft string rod is formed by connecting two-leaf right movable plates and three-leaf left movable plates in series on the long shaft string rod at intervals through a middle bushing, and then welding and fixing the two ends of the tip of the long shaft string rod and the two outer side surfaces of the three-leaf left movable plates to manufacture an integrated product of the piece 2.

The invention aims to overcome the defects in the prior art, and provides a flood drainage and fighting valve, aiming to solve the technical problems, the technical scheme is that the flood drainage and fighting valve comprises a valve body pipe barrel part, a pipeline and an M-shaped flange, wherein the pipeline and the M-shaped flange adopt a welded and fixed structure, the pipeline respectively adopts a welded and fixed structure with an external pressure load reinforcing ring plate, an external pressure load reinforcing rib plate A and an external pressure load reinforcing rib plate B, and a complete product of an integrated part 1 is manufactured; moreover, the joint of the M-shaped flange on the valve body pipe barrel part and the three-leaf left movable plate on the movable hinge component adopts a structural form of welding and fixing; and the external pressure load reinforcing rib plates A and B are respectively uniformly distributed on the outer circumference of the pipeline.

The invention aims to overcome the defects in the prior art, and provides a flood drainage and fighting valve, aiming to solve the technical problems, the invention adopts the technical scheme that the flood drainage and fighting valve comprises a valve component, a valve component and a valve body, wherein the valve component is provided with a W-shaped flange plate, the joint parts of the W-shaped flange plate, an external pressure load reinforcing channel steel and an external pressure load reinforcing rib plate respectively adopt a welding and fixing structure, and a complete product of an integrated piece 3 is manufactured; moreover, the joint of the W-shaped flange on the valve component and the two-leaf right movable plate on the movable hinge component adopts a structural form of welding and fixing; and the W-shaped flange on the valve component and the geometric arc line at the contact surface of the M-shaped flange on the valve body pipe barrel component have the structure form of good fit.

The invention aims to overcome the defects in the prior art, and provides a flood drainage and fighting valve, aiming at solving the technical problems, the adopted technical scheme is as follows: when the nominal diameter DN of the pipeline B series is: 450. 500, 600, 700, 800, 900, 1000, 1200, 1400 and 1600[ mm ], the effective clearance S between the outer side surface of the M-shaped flange on the valve body pipe barrel part and the inner side surface of the right movable plate with two blades on the movable hinge component is respectively selected to be the structure form with S being more than or equal to 2-4 mm.

The invention aims to overcome the defects in the prior art, and provides a flood drainage and fighting valve, aiming at solving the technical problems, the adopted technical scheme is as follows: the complete product is suitable for underground pipe network main branch pipes or main pipeline water outlets for rainwater drainage on municipal roads in a certain urban area, and when flood occurs, the acting force of hydraulic potential pressure difference naturally generated inside and outside the 'valve' or the gravity of the self weight of the valve part in the no-rain period automatically opens or closes the W-shaped flange on the valve part to achieve the purposes of drainage and flood resistance.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a front view of a kit according to an embodiment of the present invention.

FIG. 2 is a top view of a kit according to an embodiment of the invention.

Fig. 3 is a right side view of a kit according to an embodiment of the invention.

Fig. 4 is a left side view of a kit according to an embodiment of the invention.

Fig. 5 is a sectional view a-a of fig. 1 and a '-a' of fig. 2 in a rotated state according to an embodiment of the present invention.

Fig. 6 is a cross-sectional view B-B of fig. 1 in accordance with an embodiment of the present invention.

FIG. 7 is a partial enlarged cross-sectional view D-D of FIG. 3 of an embodiment of the present invention.

Fig. 8 is an enlarged view of part K of fig. 9 according to an embodiment of the present invention.

FIG. 9 is a cross-sectional view of the variation of C-C of FIG. 3 closed in accordance with an embodiment of the present invention.

Fig. 10 is a cross-sectional view of the variation of C-C of fig. 3 open in accordance with an embodiment of the present invention.

Fig. 11 is a schematic diagram of a variation state of the cross section C-C of fig. 3 when the water level in the underground pipe network main branch or main pipeline outlet in a certain town area is slightly higher than the water level in the river bed of the great river, the lake or the main road when the product is installed at the water outlet of the underground pipe network main branch or main pipeline for draining rainwater on the municipal road surface in the town area.

FIG. 12 is a schematic diagram of a variation state of the C-C section of FIG. 3 when the water level in the underground pipe network main branch or main channel outlet in a town area is far lower than the water level in the river bed of the great river, the lake or the main channel, when the water level in the underground pipe network main branch or main channel outlet is installed at the urban area for draining rainwater on the municipal road surface.

Fig. 13 is a schematic diagram of a variation state of a cross section C-C of fig. 3, when the water level in the underground pipe network main branch or main channel outlet in a certain town area is far higher than the water level in the river bed of a great river, lake or main channel, the product is installed at the water outlet of the underground pipe network main branch or main channel for draining rainwater on the municipal road surface in the town area.

FIG. 14 is a set of products according to an embodiment of the present invention, which is installed at the water outlet of the underground pipe network main branch or main pipe for draining rainwater from the municipal road surface in a certain urban area, when the water level in the underground pipe network main branch or main pipe outlet in the area is: in the rainless period, when the water level of the riverbed of the great river, the lake or the main road is lower than the outlet of the pipeline, the schematic diagram of the changing state of the C-C section of the figure 3 is realized.

In fig. 3: 2-1, long shaft string rod; 2-2. a lining; 2-3, a two-leaf right movable plate; 3-1. a W-shaped flange plate; 3-2, externally pressing load reinforcing channel steel; 3-3. reinforcing plate C for external pressure load.

In fig. 5: 1-3, externally pressing a load reinforcing ring plate; 1-4, externally pressing a load reinforcing rib plate A; and 1-5, externally pressing the load reinforcing rib plate B.

In fig. 6: 1-2. an M-shaped flange; 1-4, externally pressing a load reinforcing rib plate A; 1-5, externally pressing a load reinforcing rib plate B; 2-1, long shaft string rod; 2-3, a two-leaf right movable plate; 2-4, a three-leaf left movable plate; a W-shaped flange plate.

In fig. 7: 3-2, externally pressing load reinforcing channel steel; 3-3. reinforcing plate C for external pressure load.

In fig. 8: 1-1. a pipeline; 1-2. an M-shaped flange; 2-1, long shaft string rod; 2-3, a two-leaf right movable plate; 2-4, a three-leaf left movable plate; 3-1. a W-shaped flange plate; and 3-2, reinforcing the channel steel by external pressure load.

In fig. 9: 1. a valve body barrel section; 2. a living hinge member; 3. a valve member.

In fig. 10: 1-1. a pipeline; 1-2. an M-shaped flange; 1-3, externally pressing a load reinforcing ring plate; 1-4, externally pressing a load reinforcing rib plate A; 1-5, externally pressing a load reinforcing rib plate B; 2-3, a two-leaf right movable plate; 2-4, a three-leaf left movable plate; 3-1. a W-shaped flange plate; 3-2, externally pressing load reinforcing channel steel; 3-3. reinforcing plate C for external pressure load.

In fig. 11: 1. a valve body barrel section; 2. a living hinge member; 3. a valve member.

In fig. 12: 1. a valve body barrel section; 2. a living hinge member; 3. a valve member.

In fig. 13: 1. a valve body barrel section; 2. a living hinge member; 3. a valve member.

In fig. 14: 1. a valve body barrel section; 2. a living hinge member; 3. a valve member.

Detailed Description

As shown in fig. 1, 3, 9 and 10, the flood drainage and fighting valve of the present embodiment has a valve body tube part 1, including: the valve body pipe barrel part 1 is in a structure fixed with the movable hinge component 2 in a welding mode, the movable hinge component 2 and the valve part 3 are in a structure fixed in a welding mode, and an integral complete product is manufactured; the movable hinge member 2 has a long shaft string rod 2-1, and the long shaft string rod 2-1 is formed by connecting a two-leaf right movable plate 2-3 and a three-leaf left movable plate 2-4 in series on the long shaft string rod 2-1 through a middle bushing 2-2 at intervals, and then welding and fixing the two ends of the tip of the long shaft string rod 2-1 and the two outer side surfaces of the three-leaf left movable plate 2-4 to manufacture an integrated product of the piece 2.

As shown in fig. 1, 5, 6, 9 and 10, the flood drainage and flood fighting valve of the present embodiment comprises a valve body and a pipe barrel part 1, wherein the valve body and the pipe barrel part 1 is provided with a pipe 1-1, the pipe 1-1 and an M-shaped flange 1-2 are welded and fixed, the pipe 1-1 is welded and fixed with an external pressure load reinforcing ring plate 1-3 and an external pressure load reinforcing rib plate a 1-4, and an external pressure load reinforcing rib plate b 1-5, respectively, to manufacture a complete product of an integrated piece 1; moreover, the joint of the M-shaped flange 1-2 on the valve body pipe barrel part 1 and the three-leaf left movable plate 2-4 on the movable hinge component 2 adopts a structural form of welding and fixing; and the external pressure load reinforcing rib plates A, B1-4 and B1-5 are respectively uniformly distributed on the outer circumference of the pipeline 1-1.

As shown in fig. 1, fig. 3, fig. 8, fig. 9 and fig. 10, the flood drainage and flood fighting valve according to the present embodiment includes a valve member 3 having a W-shaped flange 3-1, where the W-shaped flange 3-1, an external pressure load reinforcing channel 3-2 and an external pressure load reinforcing rib plate 3-3 are respectively welded and fixed at their joint portions, and a kit product of the integrated member 3 is manufactured; moreover, the joint of the W-shaped flange 3-1 on the valve component 3 and the two-leaf right movable plate 2-3 on the movable hinge component 2 adopts a welding and fixing structural form; and the W-shaped flange 3-1 on the valve component 3 and the geometric arc line at the contact surface of the M-shaped flange 1-2 on the valve body pipe barrel component 1 have the structure form of good fitting.

As shown in fig. 8, fig. 9 and fig. 10, the flood drainage and fighting valve according to this embodiment includes when the nominal diameter DN of the pipe 1-1B series is: 450. 500, 600, 700, 800, 900, 1000, 1200, 1400 and 1600[ mm ], the effective clearance S between the outer side surface of the M-shaped flange 1-2 on the valve body pipe barrel part 1 and the inner side surface of the two-leaf right movable plate 2-3 on the movable hinge component 2 is respectively selected to be not less than 2-4 mm.

As shown in figures 3, 9 and 10, the flood drainage and flood control valve of the embodiment comprises the complete product, and when a water conservancy network project is scientifically planned and built for thousands of years in a certain urban and rural area on the comprehensive plan, and flood drainage and flood control are realized when the actual attack of stormy rain and snow or extra-large stormy rain and snow is encountered and causes flood accumulation and disasters, the valve automatically opens or closes the valve member 3 to achieve the flood drainage and flood control purpose of the W-shaped flange plate 3-1 by utilizing the acting force of the pressure difference of the hydraulic power naturally generated inside and outside the valve member when flood drainage is performed or the gravity of the valve member 3 is free of the gravity of the valve member 3 during the no-rain period, and the acting force of the pressure difference of the hydraulic power naturally generated on the main trunk line bank of a lake (such as Zhejiang Min river, Wen Chi river, Wen river, Changjiang river, Zhujiang river basin, yellow river basin, Huajiang river basin, Hai river basin and the Hai river basin) and the like, the main trunk bank border of a main road bank of a glan lake (such as … …), and the underground pipe network A kind of valve device which saves worry and energy.

As shown in fig. 1, 3 and 9, 10 and 11, the flood drainage and flood fighting valve according to the present embodiment further includes a barrel part 1 having a valve body, including: the valve body pipe barrel part 1 is in a structure fixed with the movable hinge component 2 in a welding mode, the movable hinge component 2 and the valve part 3 are in a structure fixed in a welding mode, and an integral complete product is manufactured; the complete set product is suitable for the water outlet of the underground pipe network main branch pipe or the main pipeline for draining rainwater on municipal roads in a certain urban area, and is used for realizing the schematic diagram of the changing state of the C-C section of figure 3 when the water level in the outlet of the underground pipe network main branch pipe or the main pipeline in the area is slightly higher than the water level of a riverbed of a river, a lake or a main road.

As shown in fig. 1, 3 and 9, 10 and 12, the flood drainage and flood fighting valve according to the present embodiment further includes a barrel 1 having a valve body, and including: the valve body pipe barrel part 1 is in a structure fixed with the movable hinge component 2 in a welding mode, the movable hinge component 2 and the valve part 3 are in a structure fixed in a welding mode, and an integral complete product is manufactured; the complete set product is suitable for the water outlet of the underground pipe network main branch pipe or the main pipe for draining rainwater on municipal roads in a certain urban area, and is used for realizing the schematic diagram of the changing state of the C-C section of figure 3 when the water level in the outlet of the underground pipe network main branch pipe or the main pipe in the area is far lower than the water level of a riverbed of a great river, a lake or a main road.

As shown in fig. 1, 3 and 9, 10 and 13, the flood drainage and flood fighting valve according to the present embodiment further includes a barrel part 1 having a valve body, including: the valve body pipe barrel part 1 is in a structure fixed with the movable hinge component 2 in a welding mode, the movable hinge component 2 and the valve part 3 are in a structure fixed in a welding mode, and an integral complete product is manufactured; the complete set product is suitable for the water outlet of the underground pipe network main branch pipe or the main pipeline for draining rainwater on municipal roads in a certain urban area, and is used for realizing the C-C section view change state schematic diagram of figure 3 when the water level in the outlet of the underground pipe network main branch pipe or the main pipeline in the area is far higher than the water level of a riverbed of a great river, a lake or a main road.

As shown in fig. 1, 3 and 9, 10 and 14, the flood drainage and flood fighting valve according to the present embodiment further includes a barrel 1 having a valve body, and including: the valve body pipe barrel part 1 is in a structure fixed with the movable hinge component 2 in a welding mode, the movable hinge component 2 and the valve part 3 are in a structure fixed in a welding mode, and an integral complete product is manufactured; this complete set product is applicable to the underground pipe network total branch pipe or the total pipeline delivery port department of municipal road surface rainwater drainage in a certain town area, and the water level in the underground pipe network total branch pipe or the total pipeline delivery port is in the region: in the rainless period, when the water level of the riverbed of the great river, the lake or the main road is lower than the outlet of the pipeline, the schematic diagram of the changing state of the C-C section of the figure 3 is realized.

Further, as shown in fig. 8 and 9, the flood drainage and fighting valve of the present embodiment includes the following B-series specification and size table (one).

Claims

1. A flood drainage and flood fighting valve having a valve body cartridge part (1), characterized by comprising: the valve body pipe barrel part (1) is in a structure fixed with the movable hinge component (2) in a welding way, the movable hinge component (2) is in a structure fixed with the valve part (3) in a welding way, and a complete set product forming a whole is manufactured; the movable hinge component (2) is provided with a long shaft tandem rod (2-1), the long shaft tandem rod (2-1) is formed by respectively connecting a two-leaf right movable plate (2-3) and a three-leaf left movable plate (2-4) on the long shaft tandem rod (2-1) in series at intervals through a middle bushing (2-2), and then welding and fixing the two ends of the tail end of the long shaft tandem rod (2-1) and the two outer side surfaces of the three-leaf left movable plate (2-4) to manufacture a complete product of the integral piece (2).

2. The flood drainage and fighting valve according to claim 1, characterized in that the valve body pipe barrel part (1) is provided with a pipeline (1-1), the pipeline (1-1) and the M-shaped flange (1-2) adopt a welded and fixed structure, the pipeline (1-1) adopts a welded and fixed structure respectively with an external pressure load reinforcing ring plate (1-3), an external pressure load reinforcing rib plate A (1-4) and an external pressure load reinforcing rib plate B (1-5), and a complete product of the integrated component 1 is manufactured; moreover, the joint of the M-shaped flange (1-2) on the valve body pipe barrel part (1) and a three-leaf left movable plate (2-4) on the movable hinge component (2) adopts a welding and fixing structural form; and the structure is characterized in that the external pressure load reinforcing rib plates A, B (1-4) and B (1-5) are respectively and uniformly distributed on the outer circumference of the pipeline (1-1).

3. The flood drainage and fighting valve according to claim 1, wherein the valve member (3) has a W-shaped flange (3-1), and the joint of the W-shaped flange (3-1) and the external pressure load reinforcing channel (3-2) and the external pressure load reinforcing rib plate (3-3) are respectively welded and fixed to form an integral product of the member 3; moreover, the joint of the W-shaped flange (3-1) on the valve component (3) and the two-leaf right movable plate (2-3) on the movable hinge component (2) adopts a structural form of welding and fixing; and the valve is characterized in that the geometrical arc line at the contact surface of the W-shaped flange (3-1) on the valve component (3) and the M-shaped flange (1-2) on the valve barrel component (1) has a structure form with good fit.

4. A flood drainage and fighting valve according to claim 1, characterized in that when the nominal diameter DN of the series B of pipes (1-1) is: 450. 500, 600, 700, 800, 900, 1000, 1200, 1400 and 1600[ mm ], the effective clearance S between the outer side surface of the M-shaped flange (1-2) on the valve body pipe barrel part (1) and the inner side surface of the two-leaf right movable plate (2-3) on the movable hinge component (2) is respectively selected to be the structure form that S is more than or equal to 2-4 mm.

5. A flood drainage and fighting valve as claimed in claim 1, wherein said kit is adapted to: on the water outlet of a general branch pipe or a general pipeline of an underground pipe network for rainwater drainage of municipal roads in a certain urban area, the W-shaped flange (3-1) on the valve part (3) is automatically opened or closed to fulfill the aims of drainage and flood fighting by acting force of hydraulic potential energy pressure difference naturally generated inside and outside the valve during flood or gravity of the self weight of the valve part (3) during a no-rain period.