CN117661712A - Filter screen type anti-blocking overflow port device suitable for concave green land and construction method thereof - Google Patents

Abstract

The invention discloses a filter screen type anti-blocking overflow port device suitable for a concave green land and a construction method, wherein the device comprises a W-shaped filter screen unit (1) and an anti-tilting filter screen unit (2), when the water level of a green belt is higher than that of an overflow well 3, larger impurities in overflow water flow are filtered and intercepted through the anti-tilting filter screen (21) of the anti-tilting filter screen unit (2), fine impurities are filtered by a W-shaped filter screen (114) of the W-shaped filter screen unit (1) and deposited in a concave part of the W-shaped filter screen (114), other parts of water are not influenced, the high overflow is not influenced by the impurities while the impurities are blocked through the W-shaped filter screen unit (1) and the anti-tilting filter screen unit (2), the W-shaped filter screen structure has a larger surface area contacted with the overflow water flow, the water flow area is effectively enlarged, and the water flow can be discharged in time; and the opening and closing of the split type well lid and the inclined installation of the reverse inclined filter screen (21) are controlled by the rotary rod mechanism (124), so that the filter screen can clean sundries conveniently.

Description

Filter screen type anti-blocking overflow port device suitable for concave green land and construction method thereof

Technical Field

The invention belongs to the technical field of overflow well covers, and particularly relates to a filter screen type anti-blocking overflow port device suitable for a concave green land and a construction method thereof.

Background

The sponge city is like a sponge, has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters and the like, absorbs water, stores water, permeates water and purifies water when raining, and realizes free migration of rainwater in the city. Under the new situation, the sponge city promotes the green building construction, the low-carbon city development and the innovative expression formed by the smart city, and is the organic combination of the modern green new technology under the new era characteristic background and a plurality of factors such as society, environment, humanity and the like.

The overflow well lid of the prior art mainly has protruding formula and flat comb formula, and flat comb formula well lid exists the most well lid as the market, and it mainly is applied to municipal road's drainage, and the structure contains planar overflow well face, and well face and overflow height parallel and level have arranged a plurality of overflow holes on it, and overflow water passes through the overflow hole and gets into municipal pipe network.

In the practical application process, because of the lack of an effective filtering method, there is a risk of blockage caused by a large amount of impurities entering a drainage pipeline, and in the past, a filter screen with fine holes is usually arranged below a well surface for filtering, but the defect that the overflow effect is greatly weakened due to the blockage of the filter screen by fine impurities such as soil weeds still exists. In order to solve the problem of blockage of the flat grate type well lid, the upward protruding type well lid is developed, the filtering performance of sundries is greatly enhanced, meanwhile, the water passing performance of high water level in heavy rain weather is also solved, but when in practical application, when the water passing water level is low and the flow speed is low, sundries such as soil, leaves, weeds and the like are easily accumulated around the well, so that the overflow water level is correspondingly increased, water loss is caused by incapacity of timely drainage, the holes of the conventional spherical well lid and the square well lid are large, fine sundries are difficult to intercept, after the traditional filter screen is added to the well lid, fine soil and weeds are easily hung on the filter screen when the water level has a certain height, and the water passing speed is reduced or even blocked. In addition, due to the design of the slope of the bulge, when the water level is higher than the overflow capacity, the water flow on the upper layer needs to climb against the action of gravity to reduce the overflow capacity.

Disclosure of Invention

Aiming at the defects or improvement demands of the prior art, the invention provides a filter screen type anti-blocking overflow port device suitable for a concave green land and a construction method thereof.

In order to achieve the above purpose, the invention provides a filter screen type anti-blocking overflow port device suitable for a concave green land and a construction method thereof, which provides the following technical scheme:

the filter screen type anti-blocking overflow port device suitable for the concave green land comprises a W-shaped filter screen unit and a reverse-tilting filter screen unit, wherein the W-shaped filter screen unit comprises a W-shaped filter screen unit filter group and a W-shaped filter screen unit frame group; wherein,

the W-shaped filter screen unit filter group comprises a W-shaped filter screen, a filter screen square frame and a filter screen center support, and the W-shaped filter screen is maintained to be W-shaped through the filter screen center support fixed at the center position of the W-shaped filter screen and the filter screen square frame welded with the W-shaped filter screen, so that the concave parts of the W-shaped filter screen are not affected by deposition of fine impurities while the fine impurities are filtered by the W-shaped filter screen;

the anti-tilting filter screen unit comprises an anti-tilting filter screen, the aperture of the anti-tilting filter screen is larger, the anti-tilting filter screen is obliquely arranged on an overflow wellhead, and larger sundries are filtered through the anti-tilting filter screen and cannot be accumulated under the action of gravity;

the W-shaped filter screen unit and the reverse-tilting filter screen unit realize that the overflow effect is not influenced while filtering the impurities of overflow water flow;

further, the filtering group of the W-shaped filter screen unit further comprises a filter screen lock catch, wherein the center of the W-shaped filter screen is fixed on the filter screen lock catch through the filter screen lock catch, and the W-shaped filter screen can be fixed on the filter screen center support through the filter screen lock catch and the filter screen center support;

further, the W-shaped filter screen unit frame group comprises a split type well cover lower part, wherein a positioning hole is formed in the lower part, and the split type well cover lower part is connected with the reverse-tilting filter screen unit;

further, the W-shaped filter screen unit frame group further comprises a rotating mechanism which is arranged on a positioning hole at the lower part of the split type well cover, and the opening and the closing of the split type well cover are controlled through the rotating mechanism;

further, the W-shaped filter screen unit frame group further comprises a limiting bayonet, and the limiting bayonet is used for limiting the rotation angle range of the rotation mechanism when the split type well lid is closed;

further, the W-shaped filter screen unit frame set further comprises a split type well cover upper part fixedly connected with the limiting bayonet through welding, the split type well cover upper part and the limiting bayonet form an opening, and the position of the filter screen center support is fixed through the opening;

further, the W-shaped filter screen unit frame group further comprises an anti-falling cross bar, and the anti-falling cross bar is connected with the upper part of the split well cover and the limiting bayonet by welding, so that the W-shaped filter screen unit frame group is stable in structure;

further, the W-shaped filter screen unit frame group further comprises a well lid connecting bayonet, wherein the well lid connecting bayonet is a rear protruding part of the rotating mechanism, which is arranged on the lower part of the split well lid, and the W-shaped filter screen unit frame group is arranged on the overflow well;

further, the reverse-tilting filter screen unit further comprises a reverse-tilting filter screen frame, and the reverse-tilting filter screen is welded and installed through the reverse-tilting filter screen frame;

a construction method for a filter screen type anti-blocking overflow port of a concave green land, which is characterized in that the method is realized by using the filter screen type anti-blocking overflow port device for the concave green land according to the claims 1-9; the construction method comprises the following steps:

s1, installing a W-shaped filter screen unit filter group

The center of the W-shaped filter screen is fixed on the filter screen lock through the filter screen lock catch, and the position of the filter screen lock catch is fixed through the filter screen center support while the position of the W-shaped filter screen is fixed;

s2, installing a W-shaped filter screen unit frame group

The rotary rod comprising the rotary mechanism and the well lid connecting bayonet is matched with a positioning hole at the lower part of the split well lid, and further, the well lid connecting bayonet is matched with a mounting hole at the inlet of the overflow well, so that the installation of the W-shaped filter screen unit frame group is completed;

s3, installing reverse-tilting filter screen unit

The reverse-tilting filter screen frame is sleeved on the lower part of the split type well lid to finish the installation of the reverse-tilting filter screen frame and the reverse-tilting filter screen fixed on the reverse-tilting filter screen frame through welding;

s4, filtering sundries through the reversely inclined filter screen and the W-shaped filter screen

After the overflow water flow passes through the reverse-tilting filter screen, the larger impurities in the overflow water flow are filtered by the reverse-tilting filter screen, the overflow water flow which is filtered by the reverse-tilting filter screen to primarily filter the larger impurities is then passed through the W-shaped filter screen, meanwhile, the tiny impurities in the overflow water flow are filtered by the W-shaped filter screen, and the filtered tiny impurities are deposited in the concave part of the W-shaped filter screen due to the action of gravity;

s5, cleaning sundries on the reversely-inclined filter screen and the W-shaped filter screen

After the drainage is finished, the suspended sundries naturally drop off due to the action of gravity after being filtered on the reverse-tilting filter screen, and manual cleaning is not needed; sundries of the W-shaped filter screen are cleaned by disassembling the reverse-tilting filter screen unit and then opening the split type well lid through the rotating mechanism, so that manual cleaning is performed.

In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:

1. according to the W-shaped filter screen unit filtering group suitable for the concave greenbelt filter screen type anti-blocking overflow port device, a filter screen for filtering fine impurities is kept to be of a W-shaped filter screen structure, so that when the W-shaped filter screen filters and intercepts fine impurities such as soil weeds, the fine impurities are deposited in a concave part of the W-shaped filter screen under the action of gravity, and the deposition position is lower than the position of an overflow well mouth, so that the water passing capacity of an overflow port is ensured not to be influenced by fine impurity accumulation;

2. the filter screen unit filter group of the W-shaped filter screen unit suitable for the concave greenbelt filter screen type anti-blocking overflow port device disclosed by the invention keeps a filter screen for filtering fine impurities into a W-shaped filter screen structure, and the W-shaped filter screen structure has a larger surface area contacted with overflow water flow, so that the water flow area is effectively enlarged, and the water flow can be timely discharged;

3. the reverse-tilting filter screen unit suitable for the concave greenbelt filter screen type anti-blocking overflow port device is obliquely arranged at the wellhead of an overflow well, the reverse-tilting filter screen is used for carrying out primary filtration on the passing overflow water flow, filtering and intercepting larger impurities carried in the overflow water flow, and the intercepted larger impurities naturally fall under the action of gravity and cannot be accumulated at the periphery of the well;

4. the W-shaped filter screen unit suitable for the concave green land filter screen type anti-blocking overflow port device comprises a rotary rod mechanism, the rotary rod mechanism is used for controlling the opening and closing of the split type well cover, so that impurities of a filter screen can be cleaned conveniently, and the reverse-tilting filter screen is obliquely arranged on an overflow well, so that larger impurities filtered and intercepted by the reverse-tilting filter screen fall off under the action of gravity, manual cleaning is not needed, and the impurities filtered by the filter screen are cleaned more conveniently.

Drawings

FIG. 1 is a schematic diagram of a screen type anti-overflow port device for a recessed green land according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a W-shaped filter screen unit suitable for a filter screen type anti-blocking overflow port device of a concave greenbelt in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of a filtering set of W-shaped filter screen units suitable for a concave greenbelt filter screen type anti-blocking overflow port device according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a square fixture of a filtering set of a W-shaped filter screen unit suitable for a concave greenbelt filter screen type anti-blocking overflow port device according to an embodiment of the invention;

FIG. 5 is a schematic diagram of a frame assembly of a W-shaped filter screen unit suitable for a screen type anti-overflow device for a concave greenbelt in accordance with an embodiment of the present invention;

FIG. 6 is a schematic diagram of a reverse-tilting filter unit suitable for a filter screen type anti-blocking overflow device in a concave green land according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a reverse-tilting filter screen suitable for use in a screen-type anti-overflow device for a recessed green space according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a frame structure of a reverse-tilting filter screen suitable for use in a screen-type anti-overflow device for a recessed green space in accordance with an embodiment of the present invention;

FIG. 9 is a schematic view showing a sundry cleaning state of a screen type anti-blocking overflow port device suitable for a concave greenbelt in accordance with an embodiment of the present invention;

like reference numerals denote like technical features throughout the drawings, in particular: 1-W-shaped filter screen unit, 2-reverse-inclined filter screen unit, 3-overflow well, 11-W-shaped filter screen unit filter group, 12-W-shaped filter screen unit frame group, 21-reverse-inclined filter screen, 22-reverse-inclined filter screen frame, 111-filter screen center support, 112-filter screen square frame, 113-filter screen lock catch, 114-W-shaped filter screen, 121-split well cover upper part, 122-split well cover lower part, 123-anti-falling horizontal bar, 124-rotary mechanism, 125-well cover connecting bayonet and 126-limit bayonet.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1, the filter screen type anti-blocking overflow port device suitable for a concave green land comprises a W-shaped filter screen unit 1 and a reverse-tilting filter screen unit 2, wherein the reverse-tilting filter screen unit 2 is arranged on the W-shaped filter screen unit 1; when the water level of the green belt is higher than that of the overflow well 3, overflow water flows into the overflow well to finish drainage after passing through the filter screen type anti-blocking overflow port device suitable for the concave green land, in the process, the overflow water flows firstly pass through the reverse-tilting filter screen unit 2, the reverse-tilting filter screen unit 2 carries out primary filtration, larger sundries carried by the overflow water flow in the primary filtration are intercepted by the reverse-tilting filter screen unit 2, and the reverse-tilting filter screen unit 2 is obliquely arranged on the overflow well 3, so that larger sundries and the overflow well 3 well Zhou Duiji are not caused, and the overflow drainage of the device is not influenced; after overflow water flows through the reverse-tilting filter screen unit 2 and is filtered for the first time, the overflow water flows through the W-shaped filter screen unit 1 and then enters the overflow well 3 to finish drainage, in the process, fine impurities in the overflow water flow with larger impurities filtered by the reverse-tilting filter screen unit 2, including weeds, soil and the like, are intercepted by the W-shaped filter screen unit 1, meanwhile, due to the action of gravity, the intercepted fine impurities are deposited at the bottom of the W-shaped filter screen unit 1, and the deposition part is lower than the wellhead of the overflow well 3, so that overflow drainage of the W-shaped filter screen unit 1 is not influenced; the W-shaped filter screen unit 1 and the reverse-tilting filter screen unit 2 can prevent sundries and simultaneously ensure that the high overflow effect is maintained without being influenced by the sundries.

The structure of the W-shaped filter screen unit 1 is shown in fig. 2, and comprises a W-shaped filter screen unit filter group 11 and a W-shaped filter screen unit frame group 12, wherein the W-shaped filter screen unit filter group 11 filters fine impurities and maintains the filter screen to be in a W shape, and the W-shaped filter screen unit frame group 12 is fixedly connected with the W-shaped filter screen unit filter group 11 and is fixedly connected with the overflow well 3 through the W-shaped filter screen unit frame group.

The W-shaped filter unit filter group 11 is shown in fig. 3, and comprises a square clamp consisting of a filter screen center bracket 111 and a filter screen square frame 112, a filter screen lock catch 113 and a W-shaped filter screen 114; the W-shaped filter screen 114 adopts a flexible steel wire mesh, the surface of the W-shaped filter screen 114 penetrates through innumerable overflow holes, the pore size is kept in the range of filtering tiny sundries such as soil, weeds and the like, the edges of the W-shaped filter screen 114 are fixedly connected through a filter screen square frame 112 through welding connection, the size of the filter screen square frame 112 is matched with the size of the wellhead of the overflow well 3, the center position of the W-shaped filter screen is fixedly buckled by a filter screen lock catch 113, the square clamp structure is shown in fig. 4, a filter screen center support 111 is fixedly connected with the filter screen square frame 112 through welding, a fixing plate with a circular opening is arranged on the filter screen center support 111, when the filter screen lock catch 113 fixed on the W-shaped filter screen is lifted, the filter screen lock catch 113 is clamped on the fixing plate through the circular opening of the fixing plate on the filter screen center support 111, and meanwhile, the W-shaped filter screen 114 is kept to be in a W shape under the action of gravity by the filter screen lock catch 113 and a square clamp formed by the filter screen center support 111 and the filter screen square frame 112.

After the overflow water flows through the W-shaped filter screen 114, soil, weeds and the like in the overflow water flow are filtered and intercepted by the W-shaped filter screen 114, and the W-shaped filter screen 114 is fixed on the filter screen center support 111 by the filter screen lock catch 113; the W-shaped filter screen 114 is fixed into a W shape through the filter screen center support 111 and the filter screen square frame 112, so that tiny impurities such as soil weeds and the like which are filtered and intercepted by the W-shaped filter screen 114 can be suspended under the action of gravity and deposited in the concave part of the W-shaped filter screen 114, and the overflow water flow passing through other parts of the W-shaped filter screen 114 is not influenced while the tiny impurities are filtered due to the fact that the deposition position of the tiny impurities is far lower than the overflow water level.

The W-shaped filter screen unit frame set 12 is shown in fig. 5, and includes a split well cover upper portion 121, a split well cover lower portion 122, a falling-preventing bar 123, a rotation mechanism 124, a well cover connection bayonet 125 and a limit bayonet 126. The upper part 121 of the split well cover and the lower part 122 of the split well cover form a split well cover, the center position of the top of the upper part 121 of the split well cover is disconnected, the center position of the top of the upper part 121 of the split well cover and the limiting bayonet 126 are fixedly connected through welding to form an opening, and the size of the opening is matched with a fixed plate on the filter screen center support 111 of the W-shaped filter screen unit filter group 11; a plurality of anti-falling cross bars 123 are welded inside the split type well cover upper part 121 and between the split type well cover upper part 121 and the limiting bayonet 126, and the anti-falling cross bars 123 enable the whole W-shaped filter screen unit frame group 12 to be more stable and firm in structure; the split well lid lower part 122 is provided with a positioning hole, and a rotary rod comprising a rotary mechanism 124 and a well lid connecting bayonet 125 is connected through the positioning hole, wherein the rotary mechanism 124 is a rotary rod at the inner part of the split well lid, and the well lid connecting bayonet 125 is a rotary rod at the protruding part of the split well lid. The W-shaped filter screen unit frame group 12 is installed in a matched mode with the positioning holes in the overflow well 3 through the well cover connecting bayonet 125, after the W-shaped filter screen unit frame group 12 is installed in a matched mode with the overflow well 3, the W-shaped filter screen unit frame group 12 is opened or closed through the rotating mechanism 124, and the position of the W-shaped filter screen unit frame group 12 when the W-shaped filter screen unit frame group 12 is closed is controlled through the limiting bayonet 126.

In the process that overflow water flows enter the overflow well 3 to finish overflow drainage after passing through the W-shaped filter screen unit 1, the W-shaped filter screen unit frame group 12 is closed through the rotating mechanism 124, meanwhile, when the W-shaped filter screen unit frame group 12 is closed, an opening formed by the upper part 121 of the split type well cover and the limiting bayonet 126 is matched with a fixed plate on the filter screen center support 111 of the W-shaped filter screen unit filter group 11, the function of stably supporting the W-shaped filter screen unit filter group 11 is achieved, and meanwhile, the whole structure of the W-shaped filter screen unit frame group 12 is more stable and firm through the anti-falling cross rod 123; after the overflow water flow is discharged through the water filter, the W-shaped filter screen 114 can be cleaned by opening the W-shaped filter screen unit frame group 12 through the rotating mechanism 124, so that the impurities on the filter screen can be cleaned quickly and conveniently.

The structure of the reverse-tilting screen unit 2 is shown in fig. 6, and includes a reverse-tilting screen 21 and a reverse-tilting screen frame 22. Mounting the reverse-tilting screen unit 2 to the overflow well 3 through the reverse-tilting screen frame 22 and supporting and fixing the reverse-tilting screen 21; as shown in fig. 7, when the overflow water level is higher than the overflow well, the overflow water flows through the anti-tilting screen 21 and is filtered by the anti-tilting screen 21, the anti-tilting screen 21 has a flexible steel wire mesh structure, the aperture of the overflow hole on the surface is large, the large impurities can be filtered, and the anti-tilting screen 21 is fixed on the anti-tilting screen frame 22 by welding. The reverse-tilting filter screen frame 22 is formed by welding a plurality of hollow steel pipes as shown in fig. 8, wherein the steel pipes at the bottom of the reverse-tilting filter screen frame 22 are matched with the size of the lower part 122 of the split type well cover at intervals, and the reverse-tilting filter screen frame 22 is fixed by the lower part 122 of the split type well cover of the installed W-shaped filter screen unit frame group 12 to complete the installation of the reverse-tilting filter screen unit 2.

Before the reversely-inclined filter screen unit 2 is used, the reversely-inclined filter screen frame 22 is matched with the lower part 122 of the split type well cover, and then the reversely-inclined filter screen frame 22 and the reversely-inclined filter screen 21 fixedly arranged on the reversely-inclined filter screen frame 22 are arranged by sleeving the reversely-inclined filter screen frame 22 on the lower part 122 of the split type well cover; when overflow water flows through the reverse-tilting filter screen unit 2, larger sundries carried in the overflow water flow are filtered and intercepted through the reverse-tilting filter screen 21, and meanwhile, due to the tangential-tilting installation mode of the reverse-tilting filter screen unit 2, sundries hung on the reverse-tilting filter screen 21 automatically fall off under the action of gravity, the situation that the periphery of a well cannot be piled up with the larger sundries is realized, and the sundries on the filter screen are cleaned simply and conveniently.

The invention provides a construction method for the filter screen type anti-blocking overflow port device applicable to a concave green land, which comprises the following specific steps:

s1, installing a W-shaped filter screen unit filter group 11

Lifting the central part of the W-shaped filter screen 114 fixedly connected with the filter screen square frame 114 through welding, and installing the filter screen lock catch 113 on the W-shaped filter screen 114 through the filter screen lock catch 113; further, the fixing plate with a circular opening on the central support 111 is used to clamp the filter screen lock catch 113, and the W-shaped filter screen 114 is maintained to be W-shaped by the filter screen lock catch 113 and the square clamp formed by the central support 111 and the square frame 112 under the action of gravity.

S2, installing W-shaped filter screen unit frame group 12

Before installing the W-shaped filter screen unit frame group 12, matching and installing a rotary rod comprising a rotary mechanism 124 and a well lid connecting bayonet 125 with a positioning hole of the split well lid lower part 122, and further matching and installing the well lid connecting bayonet 125 with an installing hole of an inlet of the overflow well 3 to complete the installation of the W-shaped filter screen unit frame group 12; after the installation, the split type well cover is closed through the rotating mechanism 124, so that the opening formed by the upper part 121 of the split type well cover and the limiting bayonet 126 is matched with the fixing plate on the filter screen center support 111 of the W-shaped filter screen unit filter group 11, and the W-shaped filter screen unit filter group 11 is stabilized.

S3, installing the reverse-tilting filter screen unit 2

Because the steel pipes at the bottom of the reverse-tilting screen frame 22 are matched with the size of the lower part 122 of the split manhole cover at intervals, the reverse-tilting screen frame 22 and the reverse-tilting screen 21 fixed on the reverse-tilting screen frame 22 can be installed by sleeving the reverse-tilting screen frame 22 on the lower part 122 of the split manhole cover firmly.

S4, filtering sundries through the reversely inclined filter screen 21 and the W-shaped filter screen 114

When the overflow water level is higher than the overflow well 3, the overflow water flow firstly passes through the reverse-tilting filter screen 21, meanwhile, larger impurities in the overflow water flow are filtered by the reverse-tilting filter screen 21, the overflow water flow which is primarily filtered by the reverse-tilting filter screen 21 is then passed through the W-shaped filter screen 114, meanwhile, fine impurities such as weeds and soil in the overflow water flow are filtered by the W-shaped filter screen 114, and due to the action of gravity, the filtered fine impurities are deposited in the concave part of the W-shaped filter screen 114, and the deposition position is lower than the overflow well 3, so that the drainage efficiency of other parts is not affected.

S5, cleaning sundries on the reverse-tilting filter screen 21 and the W-shaped filter screen 114

After the drainage is finished, the suspended sundries which are filtered on the reverse-tilting filter screen 21 naturally drop under the action of gravity, and are not required to be cleaned manually; the sundries of the W-shaped filter screen 114 are cleaned as shown in fig. 9, after the worker takes down the reversely-inclined filter screen unit 2 which is firmly sleeved, the split type well cover is opened through the rotating mechanism 124, the sundries deposited in the concave part of the W-shaped filter screen 114 can be cleaned, after the cleaning is finished, the split type well cover is closed through the rotating mechanism 124, the reversely-inclined filter screen unit 2 is firmly sleeved, and the anti-blocking overflow port device is convenient to use again.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The filter screen type anti-blocking overflow port device suitable for the concave greenbelt comprises a W-shaped filter screen unit (1) and a reverse-tilting filter screen unit (2), wherein the W-shaped filter screen unit (1) comprises a W-shaped filter screen unit filter group (11) and a W-shaped filter screen unit frame group (12); wherein,

the W-shaped filter screen unit filter group (11) comprises a W-shaped filter screen (114), a filter screen square frame (112) and a filter screen center support (111), wherein the W-shaped filter screen is maintained to be W-shaped through the filter screen center support (111) which is used for fixing the center position of the W-shaped filter screen (114) and the filter screen square frame (112) which is welded and connected with the W-shaped filter screen (114), so that the concave parts of the W-shaped filter screen (114) are not affected by the deposition of fine impurities while the fine impurities are filtered;

the anti-tilting filter screen unit (2) comprises an anti-tilting filter screen (21), wherein the aperture of the anti-tilting filter screen is larger, the anti-tilting filter screen is obliquely arranged on an overflow wellhead, and larger sundries are filtered through the anti-tilting filter screen (21) and cannot be accumulated under the action of gravity;

the W-shaped filter screen unit (1) and the reverse-tilting filter screen unit (2) realize that overflow water flow sundries are filtered and overflow is not influenced.

2. The anti-blocking overflow device for a concave green land filter screen according to claim 1, wherein the W-shaped filter screen unit filter group (11) further comprises a filter screen lock catch (113), the W-shaped filter screen (114) is fixed by the filter screen lock catch (113) to be centrally located on the filter screen lock catch (113), and the W-shaped filter screen is fixed by the filter screen lock catch (113) to the filter screen center support (111) to be fixed on the filter screen center support (111).

3. A screen type anti-clogging overflow vent apparatus adapted for use in a recessed green area as claimed in claim 1, wherein said W-shaped screen unit frame assembly (12) includes a split well lid lower portion (122) having a locating hole therein, said reverse tilting screen unit (2) being connected by said split well lid lower portion (122).

4. A screen type anti-clogging overflow port device adapted for a recessed green land as claimed in claim 3, wherein said W-shaped screen unit frame assembly (12) further comprises a rotary mechanism (124) mounted to a positioning hole of said split well cover lower portion (122), said rotary mechanism (124) controlling the opening and closing of the split well cover.

5. The anti-clogging overflow port device adapted for use with a recessed green land screen of claim 4 wherein said W-shaped screen unit frame assembly (12) further comprises a limit bayonet (126), said limit bayonet (126) limiting the range of rotation angle of said rotation mechanism (124) when the split manhole cover is closed.

6. The anti-clogging overflow port device for a recessed green land screen of claim 5, wherein said W-shaped screen unit frame assembly (12) further comprises a split well cover upper portion (121) secured to said spacing bayonet (126) by a welded connection, said split well cover upper portion (121) and spacing bayonet (126) forming an opening through which said screen center support (111) is secured.

7. The anti-clogging overflow port device for a recessed green land screen of claim 6, wherein said W-shaped screen unit frame assembly (12) further comprises an anti-fall bar (123) connecting said split well cover upper portion (121) and said limit bayonet (126) by welding to stabilize the W-shaped screen unit frame assembly (12) structure.

8. The anti-clogging overflow port device for a recessed green land screen of claim 7 wherein said W-shaped screen unit frame assembly (12) further comprises a well lid attachment bayonet (125), said well lid attachment bayonet (125) being a rear projection of said rotary mechanism (124) mounted on said split well lid lower portion (122) by which said W-shaped screen unit frame assembly (12) is mounted on an overflow well (3).

9. A screen type anti-clogging overflow vent apparatus adapted for use in a recessed green area as recited in any one of claims 1-8, wherein said counter-tilting screen unit (2) further comprises a counter-tilting screen frame (22), said counter-tilting screen (21) being welded by said counter-tilting screen frame (22).

10. A construction method for a filter screen type anti-blocking overflow port of a concave green land, which is characterized in that the method is realized by using the filter screen type anti-blocking overflow port device for the concave green land according to the claims 1-9; the construction method comprises the following steps:

s1, installing a W-shaped filter screen unit filter group (11)

The center of the W-shaped filter screen (114) is fixed on the filter screen lock catch (113) through the filter screen lock catch (113), and the position of the filter screen lock catch (113) is fixed through the filter screen center support (111) while the position of the W-shaped filter screen (114) is fixed;

s2, installing a W-shaped filter screen unit frame group (12)

The rotary rod comprising the rotary mechanism 124 and the well lid connecting bayonet 125 is matched with the positioning hole of the split well lid lower part 122, and further, the well lid connecting bayonet 125 is matched with the mounting hole of the inlet of the overflow well 3, so that the installation of the W-shaped filter screen unit frame group 12 is completed;

s3, installing a reverse-tilting filter screen unit (2)

The reverse-tilting filter screen frame (22) and the reverse-tilting filter screen (21) fixed on the reverse-tilting filter screen frame are installed by welding through sleeving the reverse-tilting filter screen frame (22) on the lower part (122) of the split type well cover;

s4, filtering sundries through the reversely inclined filter screen (21) and the W-shaped filter screen (114)

After the overflow water flow passes through the reverse-tilting filter screen (21), larger impurities in the overflow water flow are filtered by the reverse-tilting filter screen (21), the overflow water flow which is filtered by the reverse-tilting filter screen (21) to primarily filter the larger impurities is then passed through the W-shaped filter screen (114), meanwhile, fine impurities in the overflow water flow are filtered by the W-shaped filter screen (114), and the filtered fine impurities are deposited in the concave part of the W-shaped filter screen (114) due to the action of gravity;

s5, cleaning sundries on the reverse inclined filter screen (21) and the W-shaped filter screen (114)

After the drainage is finished, the suspended sundries are filtered on the reverse-tilting filter screen (21) and naturally drop under the action of gravity, so that manual cleaning is not needed; sundries of the W-shaped filter screen (114) are cleaned by disassembling the reverse-tilting filter screen unit (2) and then opening the split type well lid through the rotating mechanism (124) to manually clean.