CN109958184B - Drainage pipeline scouring and intercepting device - Google Patents
Drainage pipeline scouring and intercepting device Download PDFInfo
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- CN109958184B CN109958184B CN201910309462.4A CN201910309462A CN109958184B CN 109958184 B CN109958184 B CN 109958184B CN 201910309462 A CN201910309462 A CN 201910309462A CN 109958184 B CN109958184 B CN 109958184B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
- E03F9/007—Devices providing a flushing surge
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Abstract
Provided is a drain pipe flushing intercepting device which is controlled based on a floating ball, wherein a door body is arranged to be capable of rotating at a closing position for closing a drain pipe to intercept drain water and at an opening position for opening the drain pipe to discharge flood and flush. An elastic member for holding the door body at a closed position allows a first water level pressure in the drain duct to open the door body. The first floating body and the first control piece are arranged in a correlation mode through the linkage mechanism, the first control piece is kept in a state of being buckled with the door body when the water level does not reach the first water level, and the first floating body rises along with the water level when water in the drainage pipeline reaches the first water level to drive the first control piece to be released from the door body so as to enable the first floating body to rotate to discharge flood; the second floating body and the second control part are arranged in a linkage manner through the linkage mechanism, so that the second floating body rises along with the water level to drive the second control part to move to a position where the second control part can be clamped with the door body during flood discharge and flushing, and after the flood discharge and flushing are finished, the second floating body falls along with the water level and drives the second control part to move so as to be released from the door body.
Description
Technical Field
The invention relates to a drainage interception device of a drainage pipeline in municipal engineering.
Background
At present, the technology for cleaning the sediment of the drainage pipeline mainly comprises rocker dredging, a high-pressure water injection method, a Hydroguard Mini micro accumulation flushing door, a HydroSelf door type automatic flushing system, a HydroFlush automatic siphon flushing device and a drainage pipeline automatic overturning weir plate intercepting flushing device based on spring compression. Traditional clear logical mode is low, efficiency is lower like the rocker mediation degree of automation, and novel clear logical mode exists energy consumption, water consumption and maintenance cost height like "inhale mud king", high-pressure water injection method, and these clear logical modes all shift out the pipeline with the deposit, have influenced municipal sewage treatment plant's operating efficiency. The HydroGuardMini micro impoundment flushing door needs electronic control monitoring, and the maintenance cost is high. The HydroSelf door type automatic flushing system requires the construction of water storage structures, and manual operation is difficult if the hydraulic device is damaged. The HydroFlush automatic siphon flushing device is difficult to maintain after being damaged, and the siphon device is easy to block. The opening angle of the automatic turning weir plate intercepting and flushing device of the drainage pipeline based on spring compression is influenced by the flow of water, so that the resistance of water flow is increased, and meanwhile, the turning weir plate is closed for a long time after the flow is reduced.
At present, sewage and initial rainwater which are mixed and connected in a rainwater pipeline are intercepted (transformed) mainly by arranging a fixed intercepting weir (newly built) in an inspection well or arranging a sewage pipe in the inspection well at a height lower than that of a water inlet pipe. The method increases the resistance of the system to rainwater drainage or reduces the height of intercepting sewage pipes, so that the connection of the sewage pipes and the sewage system pipelines is limited.
Disclosure of Invention
The utility model provides a drainage pipe erodees intercepting device which can solve at least one following problem:
the problem of rapid drainage is solved, so that the designed rainwater flow of a rainwater pipeline is not influenced;
the dredging efficiency is improved, the problems of high energy consumption, high water consumption and high maintenance cost in the pipeline deposit removing process are solved, and the disposal problem after the pipeline deposit is removed is avoided;
the automatic control requirement and the maintenance requirement are reduced, and the occupied area is reduced.
The drainage pipeline scouring and intercepting device comprises a door body, an elastic part, a first control part, a first floating body, a second control part and a second floating body. Wherein the door body is configured to be rotatable in a closed position closing the drain duct to intercept the drain and in an open position opening the drain duct for flood discharge flushing. And an elastic member for keeping the door body at a closing position, and allowing the first water level pressure in the drainage pipeline to open the door body. The first control piece is used for buckling the door body. The first floating body and the first control piece are arranged in a correlation mode through a first linkage mechanism, the first control piece is kept in a state of being buckled with the door body when the water level does not reach the first water level, and the first floating body rises along with the water level to drive the first control piece to be released from the door body when the water in the drainage pipeline reaches the first water level, so that the door body rotates to discharge flood; the second control piece is used for buckling the door body; the second floating body and the second control part are arranged in a correlation mode through a second linkage mechanism, so that the second floating body rises along with the water level to drive the second control part to move to a position where the second control part can be clamped with the door body during flood discharge flushing, and after the flood discharge flushing is finished, the second floating body descends along with the water level and drives the second control part to move so as to be released from the door body.
In one or more embodiments, the angle between the closing position and the opening position of the door body is 90 °.
In one or more embodiments, the door body is pivoted to a door frame, the first linkage mechanism includes a first lever, a first push-pull rod and the first control member, the first control member is pivoted to the door frame, the first lever is pivoted to the door frame, and the first push-pull rod is hinged to the first lever and the first control member respectively; the first floating body drives the first lever, the first lever prizes the first push-pull rod, and the first push-pull rod further pushes and pulls the first control piece to rotate.
In one or more embodiments, the first control piece is provided with a hook, the hook is used for clamping the door body and is provided with a guide inclined plane at the end side, and when the door body is pulled by the elastic component to reset, the door body touches the first control piece along the guide inclined plane so as to push the control piece away; after the door body enters the closing position, the control piece falls down under the action of the self weight of the floating body and clamps the hook on the door body.
In one or more embodiments, the device further comprises a synchronization mechanism, wherein the synchronization mechanism comprises a synchronization connecting rod, a synchronization push-pull rod and the first control piece, the synchronization connecting rod is pivoted on the door frame, the synchronization push-pull rod is hinged with the synchronization connecting rod and the first control piece respectively, and the synchronization mechanism and the first linkage mechanism jointly act on the first control piece.
In one or more embodiments, the first linkage mechanism is disposed above the first control member, the second linkage mechanism is disposed below the first control member, and the first control member is disposed corresponding to an upper portion of the door body.
In one or more embodiments, the door body is pivotally connected to a door frame, the second linkage mechanism includes a second lever, the second floating body is connected to a distal end of the second link, a sliding slot is disposed on the second control member, a proximal end of the second lever is slidably connected to the sliding slot, floating of the second floating body drives the second lever to rotate, and the second lever pries the second control member to rotate the second control member.
In one or more embodiments, during the flood discharge flush, the second float drives the second control member to have a tendency to rotate against the door body to cause the second control member to jam against the door body.
In one or more embodiments, in the open position, the door body tends to rotate toward the closed position due to a restoring force exerted by the elastic member, so that a force exerted on the second control member is directed toward a rotation center of the second control member or forces the second control member to have a tendency to continue to rotate against the door body.
In one or more embodiments, the door body is pivotally connected to a door frame, the elastic member includes an adjusting component, a spring, a tension belt, and a tension pulley, one end of the tension belt is connected to the door body, and the other end of the tension belt is connected to one end of the spring after being guided by the tension pulley, the other end of the spring is connected to the adjusting component, the adjusting component is disposed on the door frame, and the adjusting member is used for adjusting tightness of the spring.
When the first floating body drives the first control piece to trip the door body, the door body can rapidly rotate under the action of water pressure and rapidly discharge, so that the designed rainwater flow of the rainwater pipeline is not influenced;
the buckling, tripping and the like of the door body are completely realized by means of the floating body, so that the dredging efficiency can be improved, the problems of high energy consumption, water consumption and high maintenance cost in the pipeline deposit clearing process are solved, the disposal problem after the pipeline deposit is cleared is avoided, the automatic control requirement and the maintenance requirement are reduced, and the occupied land is reduced.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a front view showing the upstream side of the drain pipe flushing intercepting apparatus.
FIG. 2 is a rear view showing the downstream side of the drain pipe flush intercepting apparatus.
3 fig. 3 3 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 1 3, 3 illustrating 3 a 3 process 3 in 3 which 3 the 3 door 3 body 3 is 3 opened 3. 3
3 fig. 3 4 3 is 3 a 3 sectional 3 view 3 A 3- 3 A 3 of 3 fig. 3 1 3, 3 showing 3 a 3 state 3 where 3 the 3 drain 3 duct 3 is 3 closed 3. 3
FIG. 5 is a view B-B of FIG. 1, showing the drain line closed.
FIG. 6 is a view B-B of FIG. 1, showing the state in which the drain pipe is opened.
FIG. 7 is a view from C-C of FIG. 1, showing the drain line closed.
Fig. 8 is a view from D-D in fig. 1, showing a process of opening the door body.
Detailed Description
The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.
As shown in fig. 1 to 4, the drainage pipeline scouring intercepting device comprises a door body 1, an elastic part, a first control part 9, a first floating body 11, a second control part 17 and a second floating body 2. As shown in fig. 1, 2 and 4, the door 1 is in a closed state, and water in the drainage pipeline cannot pass through the door. Fig. 3 and 8 show three positions of the door opening process, and when the door 1 is in a substantially horizontal position, the door 1 reaches an opening position, i.e., the lowest position in fig. 3 and 8. In this open position, the water intercepted on the upstream side is released for flood flushing purposes.
The elastic component is used for keeping the door body 1 at the closing position shown in fig. 1, fig. 2, fig. 4, fig. 5 and fig. 7, namely the door body 1 can not be opened until the door body 1 overcomes the elastic force of the elastic component acting on the door body 1, the elastic force of the elastic component is related to the water level needing to be intercepted, and after the set water level is reached, the force of the water pressure acting on the door body 1 opens the door body 1 to drive the door body 1 to rotate until the door body 1 reaches the opening position of the complete opening. As shown in fig. 1, 2, 4, 5, and 7, when the door 1 is rotated, the door 1 is tilted, and the gravity of the door 1 also assists the door 1 to open. One embodiment of the elastic component comprises an adjusting component 6, a spring 13, a tension belt 14 and a tension pulley 15, wherein the lower end of the tension belt 15 is connected to the door body 1, the upper end of the tension belt is guided by the tension pulley 15 and then connected to the lower end of the spring 13, the upper end of the spring 13 is connected to the adjusting component 6, the adjusting component 6 is arranged on a door frame 16, and the adjusting component 6 is used for adjusting the tightness of the spring 13. One embodiment of the adjustment assembly 6 comprises a bolt and a joint, which are rotatably connected, by means of which the upper end of the spring 13 is connected, the bolt cooperating with a threaded hole in the door frame 16, by means of which the spring 13 is driven to expand and contract by rotating the bolt. In the embodiment shown in the figure, the body of the door body 1 is not connected with the tension belt 14, one side of the door body 1 is connected with the control arm 110, the height of the control arm 110 is lower than half of the height of the door body 1, a rod part is fixed on the control arm 110, and the lower end of the tension belt 14 is sleeved on the rod part.
The first control member 9, as shown in fig. 5, clamps the door body 1 at the closed position, and keeps the door body 1 at the closed position, so that even at the upstream side of the door body 1, the water pressure at the upstream side of the door body 1 can overcome the acting force of the elastic member during the rising of the water level, and the door body 1 will not be opened, thereby facilitating the rising of the intercepted water level. Or the elastic member may be provided with a higher sensitivity, and the elastic force provided by the elastic member may be sufficient to pull the door body 1 from its open position back to its closed position without being affected by the water pressure. After the water level on the upstream side reaches the design water level, the first control member 9 will be disengaged from the door body 1 by the first floating body 11, as will be described later. At this time, the spring 13 is in a most contracted state, the elastic force acting on the door body 1 is small, and at this time, the water pressure is maximum, so the door body 1 will be opened rapidly, as shown in fig. 2 and 8, although the spring 13 will be tensioned gradually in the process of rotating the door body 1, the elastic force acting on the door body 1 will be larger and larger, but the gravity of the door body 1 will partially offset the acting force of the elastic component due to the inclination of the door body 1, the door body 1 will continue to be opened rapidly until the door body 1 reaches the lowest position, as will be described later, the door body 1 will be clamped by the second control component 18 at the opening position, even if the water level of the drainage water drops and the restoring force of the elastic component acts on the door body 1 with time, there will be no actual restoring action due to the clamping at this time.
One way of locking the first control member 9 to the door 1 is to form a hook 91, and a guide slope 92 is formed on the end side of the hook 91, and the hook 91 hooks the upper edge of the door 1 or other portion of the door 1 protruding therefrom. The guiding inclined plane 92 makes the hook 91 similar to a bird's beak shape, when the door body 1 returns, the door body 1 touches the first control part 9 along the guiding inclined plane 92 to push the first control part 9 open to reach a closing position, and then the first control part 9 falls and is clamped on the door body 1.
The movement of the first control element 9 is controlled by the first floating body 11. The first floating body 11 and the first control part 9 are arranged in a correlation manner through a linkage mechanism, and the linkage mechanism has various modes, so long as the first floating body 11 and the hook 91 move in the same direction, namely when the first floating body 11 moves upwards, the hook 91 rotates upwards and tends to be disengaged from the door body 1, and when the water level reaches a set water level, the hook 91 and the door body 1 are completely disengaged; or when the first floating body 11 descends along with the descending of the flood discharge flushing water level, the hook 91 rotates downwards and moves to the position corresponding to the buckling door body 1. One embodiment of the linkage mechanism includes a first lever 111 and a first push-pull rod 10, the first lever 111 is also pivoted on the door frame 16, the first push-pull rod 10 is hinged to the first lever 111 and the first control member 9, respectively, so that the first floating body 11 drives the first lever 111, the first lever 111 pries the first push-pull rod 10, and the first push-pull rod 10 pushes and pulls the first control member 9 to rotate.
As an alternative, a synchronization mechanism is configured for the first control element 9, and the synchronization mechanism includes a synchronization link 7 and a synchronization push-pull rod 71, the synchronization link 7 is pivoted on the door frame 16, the synchronization push-pull rod 71 is hinged with the synchronization link 7 and the first control element 9, and the synchronization mechanism and the aforementioned linkage mechanism jointly act on the first control element 9 to enable the first control element 9 to obtain stable rotation.
As shown in fig. 1 to 8, the angle between the closing position and the opening position of the door body 1 is 90 °, but it is not limited thereto, and may be greater than or less than 90 °.
As shown in fig. 3 and 5, the second control member 18 is an L-shaped or right-angled member, the right-angled corner of which is mounted on the door frame 16 via the pivot 3, and the lower end of which is engaged with a control arm 110 of the door body 1, and in one embodiment, the control arm 110 is provided at the side thereof with a pin 112. When the door body 1 rotates to the opening position, the lower end of the second control member 18 is engaged with the pin 112. In one embodiment, the latch between the second control member 18 and the control arm 110 is configured such that the force (including most of the force) applied by the control arm 110 to the second control member 18 is directed to the pivot shaft 3, which has the advantage that no moment is generated for rotating the second control member 18, and even if a larger moment is applied to rotate the control arm 110 to the closing position of the door body 1, the door body 1 cannot rotate due to the latch of the second control member 18. In another embodiment, the latch between the second control member 18 and the control arm 110 is configured such that the force (including most of the force) applied by the control arm 110 to the second control member 18 is directed to a position to the right of the pivot shaft 3, and as such, the latch is very strong and the door 1 cannot be rotated to the closed position without being latched. The advantages of the previously described embodiments also include that the second floating body 2 driving the second control element 18 can be arranged to be small or that the force with which the second floating body 2 drives the second control element 18 needs to be small only to be achieved. The second floating body 2 is connected with the second control element 18 through a linkage mechanism, and similarly, the embodiment of the linkage mechanism can be various as long as the relative position relationship or the relative motion relationship between the second floating body 2 and the second control element 18 can be satisfied: when the flood discharge is flushed, the second floating body 2 rises along with the water level to drive the second control part 18 to move to a position where the second control part can be clamped with the door body 1, and after the flood discharge is flushed, the second floating body 2 falls along with the water level to drive the second control part 18 to move so as to be released from the door body 1. In the embodiment shown in the figures, the linkage mechanism comprises a second lever 21, the second floating body 2 is connected to the distal end (i.e. the labor-saving end) of the second lever 21, a sliding slot (not shown in the figures) is arranged on the second control member 18, the proximal end of the second lever 21 is slidably connected with the sliding slot, the floating of the second floating body 2 drives the second lever 21 to rotate, and the second lever 21 pries the second control member 18 to rotate the second control member 18. The second lever 21 is attached to the doorframe 16 via the bracket 4. As shown in fig. 3, during the flood discharge and flushing, the second floating body 2 is under the action of the floating force, and drives the second control member 18 to make the second control member 18 have a tendency to rotate against the door body 1, i.e. rotate clockwise in the figure, so that the second control member 18 is forced to clamp the door body 1, i.e. clamp the control arm 110 of the door body 1, by a small force.
The operation principle of the embodiment shown in fig. 1 to 8 is that the door body 1 and the door frame 16 are closed when the water level does not reach the set height, i.e., the first water level. When the water level reaches the set height, the first floating body 11 is supported to drive the first push-pull rod 10 connected with the first floating body to pull down the first control piece 9 connected with the first push-pull rod 10, so that the door body 1 clamped by the first control piece 9 is loosened, the door body 1 is flushed and rotated to the bottom under the action of water power, the door body 1 is clamped by the second control piece 18, and the door body 1 is completely opened to finish the opening process of the door body 1. When the water is lowered to the set height, the second floating body 2 descends to drive the second control piece 18 which is arranged in a relevant mode, the second control piece 18 which is connected with the second floating body is rotated anticlockwise, the door body 1 clamped by the door closing control deflector rod 18 is loosened, the door body 1 rotates to the top through the tension belt 14 fixed on the door body 1 under the action of the tensile force of the spring 13, the door body 1 is clamped by the first control piece 9, and the door closing process of the turnover door is completed.
In the embodiment, the door body 1 is clamped through the first control part 9, so that the door body 1 and the door frame 16 are closed, and water leakage is avoided; at the opening position, the door body 1 is clamped through the second control part 18, the 90-degree opening of the door body 1 is guaranteed, and flood discharge is not affected. In addition, the tension of the spring 13 is adjusted through the spring tension adjusting part 6, so that the impact force of closing the door on the site can be adjusted conveniently.
Moreover, a person skilled in the art can also design further engineering details on the basis of the foregoing description, for example, the second control element 2, the first control element 11 can be circular, cylindrical, square, rectangular; the material may be stainless steel, polypropylene, polyvinyl chloride, etc. Other component materials may be stainless steel, polypropylene, polyvinyl chloride, and the like.
The first control member 11 is held up to bring the first push-pull rod 10 connected thereto to an opening height of between 0.3 and 0.8 times the total height of the interior of the pipeline.
The second control part 2 descends to drive the height of the buckling door body of the second control part 18 connected with the second control part to be between 0.02 and 0.3 of the total height of the pipeline.
The height of the door body 1 is 0.3-0.9 of the total height in the pipeline.
The length of the spring 13 ranges from 15cm to 50cm, the rigidity ranges from 1 to 50N/mm, and the tensile force ranges from 25N to 500N.
Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.
Claims (8)
1. Drainage pipe erodees intercepting device, its characterized in that includes:
the door body is arranged to rotate at a closing position for closing the drainage pipeline to intercept drainage and at an opening position for opening the drainage pipeline to discharge flood and wash;
an elastic member for maintaining the door body at a closed position, the elastic member allowing a first water level pressure in the drain duct to open the door body;
the first control piece is used for buckling the door body;
the first floating body is associated with the first control piece through a first linkage mechanism, the first control piece is kept in a state of being buckled with the door body when the water level does not reach the first water level, and the first floating body rises along with the water level to drive the first control piece to be released from the door body when the water in the drainage pipeline reaches the first water level so as to enable the door body to rotate and discharge flood;
the second control piece is used for buckling the door body; and
the second floating body is associated with the second control part through a second linkage mechanism, so that the second floating body rises along with the water level to drive the second control part to move to a position where the second control part can be clamped with the door body during flood discharge and flushing, and after the flood discharge and flushing are finished, the second floating body descends along with the water level and drives the second control part to move so as to be released from the door body;
the door body is pivoted on a door frame, the first linkage mechanism comprises a first lever and a first push-pull rod, the first control piece is pivoted on the door frame, the first lever is pivoted on the door frame, and the first push-pull rod is respectively hinged with the first lever and the first control piece; the first floating body is arranged at the far end of the first lever and drives the first lever along with the change of the water level so that the first lever prizes the first push-pull rod, and the first push-pull rod further pushes and pulls the first control piece to rotate;
the drainage pipeline scouring intercepting device further comprises a synchronizing mechanism, the synchronizing mechanism comprises a synchronizing connecting rod and a synchronizing push-pull rod, the synchronizing connecting rod is pivoted on the door frame, the synchronizing push-pull rod is hinged with the synchronizing connecting rod and the first control piece respectively, and the synchronizing mechanism and the first linkage mechanism jointly act on the first control piece.
2. The drainpipe flushing intercepting apparatus of claim 1, wherein the door body is at a 90 ° angle between the closed position and the open position.
3. The drainpipe flushing intercepting device according to claim 1, wherein the first control member has a hook for locking the door body and a guiding inclined surface at an end side, and when the door body is reset by the elastic member, the door body touches the first control member along the guiding inclined surface to push the first control member open; after the door body enters the closing position, the first control piece falls down under the action of the self weight of the first floating body and clamps the hook on the door body.
4. The drainpipe flushing intercepting device of claim 1, wherein the first linkage is disposed above the first control member, the second linkage is disposed below the first control member, and the first control member is disposed corresponding to an upper portion of the door body.
5. The drainpipe flushing intercepting device of claim 1, wherein the door is pivotally connected to a door frame, the second linkage comprises a second lever, the second float is connected to a distal end of the second lever, the second control member is provided with a sliding slot, a proximal end of the second lever is slidably connected to the sliding slot, the floating of the second float rotates the second lever, and the second lever pries the second control member to rotate the second control member.
6. The drainpipe scour interception device of claim 1, wherein during the flood discharge scour, the second float drives the second control member to have a tendency to rotate against the door body to cause the second control member to catch the door body.
7. The drainpipe flushing intercepting device of claim 1 or 6, wherein in the open position, the door tends to rotate toward the closed position due to the restoring force of the elastic member, so that the force applied to the second control member is directed toward the center of rotation of the second control member or forces the second control member to continue to rotate against the door.
8. The drainpipe flushing intercepting device of claim 1, wherein the door is pivotally connected to a door frame, the elastic member comprises an adjusting member, a spring, a tension belt, and a tension pulley, one end of the tension belt is connected to the door, the other end of the tension belt is guided by the tension pulley and then connected to one end of the spring, the other end of the spring is connected to the adjusting member, the adjusting member is disposed on the door frame, and the adjusting member is used for adjusting the tightness of the spring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910309462.4A CN109958184B (en) | 2019-04-17 | 2019-04-17 | Drainage pipeline scouring and intercepting device |
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| CN201910309462.4A CN109958184B (en) | 2019-04-17 | 2019-04-17 | Drainage pipeline scouring and intercepting device |
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| CN109958184A CN109958184A (en) | 2019-07-02 |
| CN109958184B true CN109958184B (en) | 2020-09-18 |
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| CN110397143A (en) * | 2019-07-31 | 2019-11-01 | 湖南奇思环保设备制造有限公司 | Box culvert self-door-locking |
| CN111877530B (en) * | 2020-07-30 | 2022-05-06 | 中国一冶集团有限公司 | Automatic flushing device for drainage pipeline |
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