CN111021513A

CN111021513A - Drainage system for municipal works

Info

Publication number: CN111021513A
Application number: CN201911319057.7A
Authority: CN
Inventors: 董威; 高士兵; 王亮
Original assignee: Jiangsu Ruen Construction Engineering Co Ltd
Current assignee: Jiangsu Ruen Construction Engineering Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-04-17

Abstract

The invention discloses a drainage system for municipal engineering, and relates to the technical field of drainage systems. The technical scheme is that a step groove, a positioning hole and a positioning rod are arranged, and the positioning rod penetrates through the positioning hole to reduce the phenomenon that the protective cover is loosened in the inner cavity of the step groove; set up groove and the lock piece of stepping down, screw up in the locating lever outer fringe through the lock piece to make comparatively firm being fixed in step groove inner chamber of protective cover, thereby reduce the potential safety hazard that the protective cover breaks away from the well and brings, reached the effect that improves the stability that the protective cover is fixed in the well top by a wide margin.

Description

Drainage system for municipal works

Technical Field

The invention relates to the technical field of drainage systems, in particular to a drainage system for municipal engineering.

Background

At present, the urban drainage system is an important municipal engineering for guaranteeing the livelihood. Drainage system mainly includes the cellar for storing things well that leads to the calandria and collect sewage that is used for discharging sewage, and drainage pipe is that urban rainwater, sewage gather jointly and unified main pipeline who discharges, and bury deeply in the underground, and the perpendicular and spaced setting in the outer lateral wall top of logical calandria of cellar for storing things well, and the inner chamber of every cellar for storing things well all link up each other with the inner chamber that leads to the calandria. The one end top lid that leads to the calandria direction was kept away from to the cellar for storing things well is equipped with the cellar for storing things well lid that is used for the shutoff cellar for storing things well notch, and a plurality of lower water holes that link up are seted up along its thickness direction to cellar for storing things well lid upper surface. When cellar for storing things top notch set up in open-air subaerial, the rainwater that gathers when it collects the rainfall in the city, and then in order to reduce the phenomenon of urban waterlogging. When the cellar well is arranged at the position where people gather, the cellar well is used for collecting sewage used in daily life of people. And finally, the rainwater and the sewage collected by all the cellar wells flow into the inner cavity of the through exhaust pipe, and are discharged after being treated uniformly.

However, when urban drainage system laid, in order to ensure the unobstructed and safe of road traffic, the road bottom often the interval be provided with a plurality of cellar for storing things well in order to collect the rainwater that gathers on the road, and the cellar for storing things well lid is most directly covered and is located the road and encircle the step groove inner chamber that cellar for storing things well periphery was seted up, it is easy to appear becoming flexible under vehicle and pedestrian's frequent passage, the phenomenon that turns up is driven and turned up by traction force even, especially when the stifled and make sewage gush appear in the logical calandria inner chamber, cellar for storing things well lid very easily breaks away from cellar for storing things well top, and then make the top notch of cellar for storing things well expose, it threatens driving and life safety of vehicle and pedestrian greatly, so.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a drainage system for municipal engineering, which has the advantage of improving the stability of fixing a pit cover on the top of a pit.

In order to achieve the purpose, the invention provides the following technical scheme:

a drainage system for municipal works comprises a roadbed layer, a through drainage pipe and a drainage well, wherein the through drainage pipe and the drainage well are arranged in an inner cavity of the roadbed layer; the inner side wall of the sewer well is longitudinally provided with a plurality of positioning rods, and the bottom wall of the protective cover is provided with a plurality of positioning holes which are convenient for the positioning rods to pass through along the thickness direction; the surface that the well direction was kept away from to the protective cover encircles the locating hole periphery and is provided with the groove of stepping down, the locating lever outer fringe just is located the inslot chamber of stepping down and is provided with the locking piece.

Through adopting above-mentioned technical scheme, the locating lever is aimed at and the cover is established downwards to the locating hole of protective cover bottom, laminates mutually in protective cover diapire and step inslot, and the outer lateral wall of protective cover is laminated mutually with step inslot lateral wall this moment, and the locating lever is less in the space of locating hole inner chamber, and then has effectively reduced the protective cover and easily has shaken in step inslot cavity pine, the phenomenon of turning up even. The positioning rod is sleeved with the locking piece, the outer edge of one end of the positioning rod, which is located at the yielding groove, is screwed down, so that the protective cover is stably fixed in the inner cavity of the stepped groove, and firmness and stability of the protective cover fixed at the top of the sewer well are improved.

Furthermore, a plurality of fixing pieces are jointly arranged between the positioning rods and the drainage well, and clamping arc grooves which are used for the number of the positioning rods are longitudinally arranged on the inner side wall of the drainage well.

Through adopting above-mentioned technical scheme, joint arc groove greatly increased the laminating area between locating lever outer fringe and the lower well inside wall, the mounting runs through the locating lever and the screw thread is screwed up inside the lateral wall of lower well, and then makes the tight degree of connection of dead lever at the lower well inside wall improve greatly.

Furthermore, the locating lever outer fringe just is located its one end of keeping away from the protective cover direction and is provided with the bottom stay perpendicularly, the lower well inside wall is provided with a plurality of butt grooves of being convenient for bottom stay male.

Through adopting above-mentioned technical scheme, bottom sprag and locating lever integrated into one piece, and the two mutually perpendicular, after the bottom sprag inserted the butt groove inner chamber completely, the position relatively fixed of bottom sprag has effectively reduced the position of locating lever and has appeared the phenomenon that the pine shakes.

Further, the outer edge of the bottom support rod is provided with an embedded annular groove in a surrounding mode, and the inner side wall of the embedded annular groove is provided with an interference ring.

Through adopting above-mentioned technical scheme, interference ring butt is between bottom strut and butt groove to reduce the space between bottom strut and the butt groove, and further improve the position stability that the bottom strut is fixed in the butt groove inner chamber. Meanwhile, the thickness of the interference ring is higher than the depth of the embedded ring groove, the side wall of the end part of the embedded ring groove can be abutted against the end wall of the interference ring in the length direction, and therefore the phenomenon that the interference ring slides on the outer edge of the bearing rod and is not easy to enter the inner cavity of the abutting groove when the bottom support rod is inserted into the abutting groove is effectively reduced.

Furthermore, one end of the positioning rod, which is far away from the direction of the bottom support rod, is provided with a guide surface.

Through adopting above-mentioned technical scheme, the area of contact when the locating lever has significantly reduced the locating lever and has inserted the constant head tank inner chamber is led to the spigot surface, and then has improved the speed and the efficiency that the locating lever inserted the constant head tank.

Further, the step inslot diapire interval is provided with a plurality of magnetic blocks that attract mutually with the protective cover magnetism, the protective cover diapire is provided with a plurality of magnetic block male laminating grooves of being convenient for along its thickness direction.

Through adopting above-mentioned technical scheme, magnetism piece and iron's protective cover magnetism are inhaled mutually, and it inserts laminating inslot inner chamber completely when the protective cover diapire pastes with step inslot bottom wall, and then in order to further insist on the protective cover and loose the phenomenon of shaking appearing in step inslot inner chamber.

Further, the step inslot lateral wall is provided with a plurality of fixed slots that are used for injecing the magnetic block position, the magnetic block diapire is provided with movable base perpendicularly, step inslot diapire be provided with along the horizontal direction with the groove that slides of movable base looks adaptation.

Through adopting above-mentioned technical scheme, movable base is the type of falling T, and it and the inslot inner chamber looks adaptation that slides, after movable base inserted the inslot inner chamber that slides, its bottom plate block in the inslot inner chamber that slides, and then make the magnetic block be difficult to upwards take out by external pulling force and leave, and then ensured the position stability of magnetic block on the bottom wall of step inslot.

Furthermore, a plurality of anti-slip pads are arranged on the inner side wall of the fixing groove and located between the magnetic block and the fixing groove.

Through adopting above-mentioned technical scheme, the slipmat is through the great characteristic joint of self surface coefficient of static friction between magnetic block and fixed slot, and then in order to improve the one end of magnetic block length direction at the tight degree of connection of fixed slot inner chamber to effectively reduce its phenomenon that breaks away from the fixed slot.

Further, the inslot lateral wall that slides is provided with directional pole perpendicularly, the activity base lateral wall runs through along its width direction and is provided with the directional hole that the directional pole of being convenient for runs through, the one end that directional pole is close to the sewer well direction is provided with the joint cover that is used for injecing the activity base position.

Through adopting above-mentioned technical scheme, the orientation pole runs through movable base to make movable base slide along orientation pole length direction in the groove inner chamber that slides. The clamping sleeve is far larger than the diameter of the directional rod in peripheral size, and can be screwed at one end of the directional rod close to the direction of the sewer well, so that the phenomenon that the movable base slides down from the directional rod and falls into the sewer well is reduced.

Furthermore, the upper surface of the protective cover is provided with two groove-shaped holes in a penetrating manner along the thickness direction of the upper surface, a plurality of barrier strips are vertically arranged on the inner side wall of each groove-shaped hole, and the peripheries of all the barrier strips are provided with lifting pieces together.

Through adopting above-mentioned technical scheme, carry and draw the piece and subside in cell type downthehole cavity under the action of gravity, when the lower well and lead to the calandria inner chamber need overhaul, operating personnel can snatch the ejector pin of carrying the piece to bottom bar and separation strip through carrying the piece offset in order upwards to pull out the protective cover.

In conclusion, the invention has the following beneficial effects:

1. the step groove, the positioning hole and the positioning rod are arranged, and the positioning rod penetrates through the positioning hole to reduce the phenomenon that the protective cover loosens in the inner cavity of the step groove; set up groove and the lock piece of stepping down, screw up in the locating lever outer fringe through the lock piece to make comparatively firm being fixed in step groove inner chamber of protective cover, thereby reduce the potential safety hazard that the protective cover breaks away from the well and brings.

2. A fixing piece and a bottom brace rod with an interference ring are arranged to improve the firmness of the positioning rod fixed on the inner side wall of the sewer well and improve the position stability of the protective cover in the inner cavity of the stepped groove; the magnetic block and the attaching groove are arranged to further improve the position stability of the protective cover in the inner cavity of the step groove; the groove-shaped holes, the barrier strips and the lifting pieces are arranged, so that the protective cover is pulled away from the inner cavity of the step groove when an operator overhauls the drainage well.

Drawings

FIG. 1 is a schematic sectional view of a municipal drainage system according to an embodiment;

FIG. 2 is a partial schematic view illustrating a protective cover and a roadbed layer in an embodiment;

FIG. 3 is an exploded view of the embodiment showing the position relationship between the protective cover and the drainage well;

FIG. 4 is an exploded view of the embodiment showing the connection between the positioning rod and the drainage well;

fig. 5 is an exploded view of the embodiment for showing the positional relationship between the magnetic block and the fixing groove.

In the figure: 1. a roadbed layer; 101. a pipe is communicated; 102. a step groove; 103. fixing grooves; 104. a non-slip mat; 105. a sliding groove; 106. an orientation bar; 107. a clamping sleeve; 2. a water drainage well; 201. clamping the arc groove; 202. a butt joint groove; 3. a protective cover; 301. a drain hole; 302. positioning holes; 303. a yielding groove; 304. a fitting groove; 305. a slot-shaped hole; 306. a barrier strip; 4. positioning a rod; 401. a guide surface; 402. a fixing member; 403. a locking member; 404. a bottom stay; 405. embedding a ring groove; 406. interference ring rings; 5. a magnetic block; 501. a movable base; 502. a directional hole; 6. and (4) lifting the pulling piece.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

a drainage system for municipal works refers to fig. 1, and comprises a roadbed layer 1, a through drainage pipe 101 arranged in an inner cavity of the roadbed layer 1, and a drainage well 2. The through-flow pipe 101 is a main drainage pipe for collecting all rainwater and sewage, and is deeply buried in the bottom of the inner cavity of the roadbed layer 1. The drainage well 2 is perpendicular to the outer side wall of the through-drainage pipe 101 and is communicated with the inner cavity of the through-drainage pipe 101 so as to collect all sewage to be discharged on the roadbed layer 1, and the sewage enters the inner cavity of the through-drainage pipe 101 to be uniformly discharged.

Referring to fig. 2 and 3, a step groove 102 is formed in the upper surface of the roadbed layer 1 and around the periphery of the drainage well 2, and a protective cover 3 for blocking a notch in the top of the drainage well 2 is placed in an inner cavity of the step groove 102. The protective cover 3 is preferably a nodular cast iron well cover with large mass, the outer side wall of the protective cover is attached to the inner side wall of the step groove 102, and the top wall of the protective cover and the upper surface of the roadbed 1 are on the same horizontal line. The upper surface of the protective cover 3 is provided with a plurality of drainage holes 301 along the thickness direction thereof so as to facilitate rainwater to flow into the inner cavity of the drainage well 2.

Referring to fig. 3 and 4, the inner side wall of the drainage well 2 is provided with positioning rods 4 along the longitudinal direction, and the positioning rods 4 are preferably screw rods, and in the embodiment, the number of the positioning rods is four. The inside wall of the suction well is longitudinally provided with clamping arc grooves 201 which are equal to the number of the positioning rods 4, so that the bonding area between the positioning rods 4 and the sewer well 2 is increased. A plurality of fixing pieces 402 are commonly disposed between the positioning rod 4 and the drainage well 2, and the fixing pieces 402 are preferably large self-tapping screws which penetrate through the positioning rod 4 and extend into the drainage well 2, so that the positioning rod 4 is fixed on the inner side wall of the drainage well 2.

Referring to fig. 2 and 4, the bottom wall of the protective cover 3 is provided with positioning holes 302 equal to the number of the positioning rods 4 along the thickness direction thereof in a penetrating manner, and the positioning holes 302 facilitate the passage of the positioning rods 4, so as to reduce the phenomenon that the protective cover 3 is easily loosened and shaken in the inner cavity of the step groove 102 after being influenced by external force. The end wall of locating lever 4, the orientation of keeping away from lower well 2 is provided with spigot surface 401 around, spigot surface 401 is through reducing the area of contact when locating lever 4 inserts locating hole 302 to improve the speed and the efficiency that locating lever 4 inserted the locating hole 302 inner chamber.

Referring to fig. 2 and 4, a locking member 403 is screwed on an outer edge of the positioning rod 4, and the locking member 403 is preferably a nut, and a bottom wall of the locking member is abutted against a top wall of the protecting cover 3, so as to fix the protecting cover 3 at the position of the inner cavity of the stepped groove 102 and effectively reduce the phenomenon that the protecting cover 3 is separated from the stepped groove 102.

Referring to fig. 2, a relief groove 303 is formed on the upper surface of the protective cover 3 and surrounds the periphery of each positioning hole 302, and the relief groove 303 is used for accommodating the locking member 403, so as to reduce the influence of the locking member 403 protruding from the upper surface of the protective cover 3 on the driving safety of the vehicle. In the embodiment, the end wall of the positioning rod 4 away from the drainage well 2 is also located in the inner cavity of the abdicating groove 303.

Referring to fig. 4, a bottom brace 404 is integrally formed at an end of the outer edge of the positioning rod 4 away from the protecting cover 3, the bottom brace 404 is perpendicular to the positioning rod 4, an inner side wall of the drainage well 2 is horizontally provided with a butt groove 202 with an inner diameter matched with an outer diameter of the bottom brace 404, and the bottom brace 404 is inserted into an inner cavity of the butt groove 202 to further improve stability of the positioning rod 4 fixed on the inner side wall of the drainage well 2.

Referring to fig. 4, the outer edge of the bottom brace 404 is provided with a ring of embedded ring groove 405 around, and an interference ring 406 is adhered to the inner side wall of the embedded ring groove 405. The interference ring 406 is preferably made of soft and easily deformable rubber, and the thickness of the interference ring 406 is greater than the depth of the embedded ring groove 405, so that when the bottom support rod 404 is inserted into the abutting groove 202, the interference ring 406 is compressed under stress and occupies the gap between the bottom support rod 404 and the abutting groove 202, and the phenomenon that the bottom support rod 404 loosens in the inner cavity of the abutting groove 202 is reduced.

Referring to fig. 4 and 5, a plurality of magnetic blocks 5 are arranged at intervals on the bottom wall of the stepped groove 102, and the magnetic blocks 5 are preferably made of magnet. A plurality of fixing grooves 103 are formed in the inner side wall of the step groove 102, which is the side wall in the height direction thereof, and the magnetic block 5 can be inserted into the inner cavity of the fixing groove 103 and have one end in the length direction thereof retained in the inner cavity of the step groove 102. The bottom wall of the protective cover 3 is provided with attaching grooves 304 (refer to fig. 3) equal to the number of the magnetic blocks 5, when the protective cover 3 passes through the positioning rod 4 and enables the bottom wall to be attached to the bottom wall in the step groove 102, the magnetic blocks 5 are just inserted into the corresponding attaching grooves 304 and magnetically attracted with the iron protective cover 3 (refer to fig. 1), so that the position stability of the protective cover 3 in the inner cavity of the step groove 102 is further improved.

Referring to fig. 5, two anti-slip pads 104 are adhered to the inner side wall of the fixing groove 103 and the side wall in the height direction of the inner side wall, and the anti-slip pads 104 are preferably rubber pads with high toughness and large outer surface friction coefficient, and are clamped between the magnetic block 5 and the inner side wall of the fixing groove 103, so as to improve the clamping tightness of the magnetic block 5 in the inner cavity of the fixing groove 103.

Referring to fig. 5, a movable base 501 is vertically welded to the bottom wall of the magnetic block 5, and the movable base 501 is made of thick iron with a large outer surface friction coefficient and is in an inverted T shape. The inner bottom wall of the stepped groove 102 is provided with sliding grooves 105 equal to the number of the fixing grooves 103 in the horizontal direction, and the end wall of one end of the sliding groove 105 in the length direction and the side wall of the fixing groove 103 far away from the drainage well 2 are on the same longitudinal line. The inner cavity of the sliding groove 105 is matched with the movable base 501, and after an operator inserts the movable base 501 into the inner cavity of the sliding groove 105, the magnetic block 5 is difficult to lift upwards from the bottom wall of the step groove 102, so that the phenomenon that the magnetic block 5 is easy to leave the step groove 102 when the protective cover 3 is separated from the step groove 102 is reduced.

Referring to fig. 5, a directional bar 106 is welded to the inner side wall of the sliding slot 105 and the longitudinal side wall thereof, and the directional bar 106 is preferably a screw rod and has a length equal to that of the sliding slot 105. The outer side wall of the movable base 501 is provided with an orientation hole 502 along the width direction thereof, the orientation rod 106 penetrates the orientation hole 502, and one end of the orientation rod close to the direction of the drainage well 2 is connected with a clamping sleeve 107 by screw thread. The size of the outer surface of the snap sleeve 107 is larger than the diameter of the orientation rod 106 to reduce the phenomenon that the movable base 501 slides down from one end of the orientation rod 106 in the length direction and falls into the drainage well 2.

Referring to fig. 2 and 3, the upper surface of the protecting cover 3 is provided with two symmetrical groove-shaped holes 305 along the thickness direction, a plurality of barrier strips 306 are vertically welded on the inner side wall of the groove-shaped hole 305 and at one end of the inner side wall close to the direction of the drainage well 2, and a lifting piece 6 is arranged on the periphery of all the barrier strips 306. The pulling member 6 is made of stainless steel and is a frame body, and the length of the top rod of the pulling member 6 is shorter than the length of the slotted hole 305 and is located above all the barrier bars 306. The two side rods of the lifting piece 6 are respectively positioned at the two sides of all the barrier strips 306 in the width direction, and the bottom rod of the lifting piece is positioned below all the barrier strips 306. The lifting piece 6 settles in the inner cavity of the groove-shaped hole 305 under the action of gravity, and when an operator needs to pull the protective cover 3 away from the inner cavity of the step groove 102, the operator can grab the top rod of the lifting piece 6 and pushes against the blocking strip 306 through the bottom rod of the lifting piece 6 to pull out the protective cover 3 upwards.

The working principle is as follows:

the bottom stay bar 404 with the interference ring 406 is completely inserted into the inner cavity of the abutting groove 202, the outer edge of the positioning rod 4 is tightly attached to the inner side wall of the embedded ring groove 405, and the fixing member 402 penetrates through the positioning rod 4 and extends to the inner cavity of the drainage well 2, so that the positioning rod 4 is fixed on the inner side wall of the drainage well 2. The movable base 501 is aligned with the sliding groove 105 and inserted into the groove opening near the direction of the drainage well 2 until the end of the magnetic block 5 far from the direction of the drainage well 2 completely abuts against the inner cavity of the fixed groove 103, and the clamping sleeve 107 is sleeved on the end of the orientation rod 106 near the direction of the drainage well 2 and screwed down.

The positioning hole 302 at the bottom of the protecting cover 3 is aligned with the positioning rod 4 and is downwards sleeved until the bottom wall of the protecting cover 3 is attached to the bottom wall of the step groove 102, and at the moment, the magnetic block 5 is just inserted into the inner cavity of the attaching groove 304 and magnetically attracted with the protecting cover 3, so that the phenomenon that the protecting cover 3 is separated from the step groove 102 is reduced. The locking member 403 is sleeved on the outer edge of the end of the positioning rod 4 located at the receding groove 303 and screwed, so that the protecting cover 3 is stably fixed to the inner cavity of the step groove 102, and the firmness and stability of the protecting cover 3 fixed to the top of the drainage well 2 are improved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are subject to the patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a drainage system for municipal works, includes road bed layer (1) and sets up in logical calandria (101), sewer well (2) of road bed layer (1) inner chamber, sewer well (2) perpendicular to leads to calandria (101) lateral wall and communicates with each other rather than the inner chamber, the one end of keeping away from logical calandria (101) direction in sewer well (2) is provided with protective cover (3), its characterized in that: a step groove (102) is formed in the upper surface of the roadbed layer (1) and surrounds the periphery of the sewer well (2), and the outer edge of the protective cover (3) is attached to the inner side wall of the step groove (102); a plurality of positioning rods (4) are longitudinally arranged on the inner side wall of the sewer well (2), and a plurality of positioning holes (302) which are convenient for the positioning rods (4) to pass through are arranged in the bottom wall of the protective cover (3) in a penetrating manner along the thickness direction; the surface that well (2) direction was kept away from in protective cover (3) encircles locating hole (302) periphery and is provided with groove of stepping down (303), locating lever (4) outer fringe just is located groove of stepping down (303) inner chamber and is provided with locking piece (403).

2. The municipal drainage system according to claim 1, wherein: a plurality of fixing pieces (402) are arranged between the positioning rod (4) and the drainage well (2) together, and clamping arc grooves (201) which are used for the number of the positioning rods (4) are longitudinally arranged on the inner side wall of the drainage well (2).

3. The municipal drainage system according to claim 2, wherein: the positioning rod (4) outer fringe just is located its one end of keeping away from protective cover (3) direction and is provided with bottom stay (404) perpendicularly, the lower well (2) inside wall is provided with a plurality of bottom stay (404) male butt joint groove (202) of being convenient for.

4. The municipal drainage system according to claim 3, wherein: the outer edge of the bottom support rod (404) is provided with an embedded ring groove (405) in a surrounding mode, and an interference ring (406) is arranged on the inner side wall of the embedded ring groove (405).

5. The municipal drainage system according to claim 4, wherein: and a guide surface (401) is arranged at one end of the positioning rod (4) far away from the direction of the bottom support rod (404).

6. The municipal drainage system according to claim 1, wherein: the bottom wall interval is provided with a plurality of magnetic blocks (5) that attract mutually with protective cover (3) magnetism in step groove (102), protective cover (3) diapire is provided with a plurality of magnetic block (5) male laminating grooves (304) of being convenient for along its thickness direction.

7. The municipal drainage system according to claim 6, wherein: the magnetic block magnetic bearing device is characterized in that a plurality of fixing grooves (103) used for limiting the positions of the magnetic blocks (5) are formed in the inner side wall of the step groove (102), a movable base (501) is vertically arranged on the bottom wall of the magnetic blocks (5), and a sliding groove (105) matched with the movable base (501) is formed in the bottom wall of the step groove (102) in the horizontal direction.

8. The municipal drainage system according to claim 7, wherein: the anti-skid device is characterized in that a plurality of anti-skid pads (104) are arranged on the inner side wall of the fixing groove (103), and the anti-skid pads (104) are located between the magnetic blocks (5) and the fixing groove (103).

9. The municipal drainage system according to claim 8, wherein: the inner side wall of the sliding groove (105) is vertically provided with an orientation rod (106), the outer side wall of the movable base (501) is provided with an orientation hole (502) which is convenient for the orientation rod (106) to penetrate through along the width direction of the outer side wall, and one end, close to the direction of the drainage well (2), of the orientation rod (106) is provided with a clamping sleeve (107) which is used for limiting the position of the movable base (501).

10. The municipal drainage system according to claim 9, wherein: protective cover (3) upper surface is provided with two slot type holes (305) along its thickness direction runs through, slot type hole (305) inside wall is provided with a plurality of barrier strip (306) perpendicularly, all barrier strip (306) periphery is provided with jointly and carries and draws piece (6).