Wharf drainage ditch gravity dredging device

Abstract

The utility model discloses a wharf drainage ditch gravity dredging device which comprises a first-stage drainage ditch, a second-stage drainage ditch arranged at the water outlet tail end of the first-stage drainage ditch, a sand setting well arranged at the water outlet tail end of the second-stage drainage ditch, a blocking component arranged at the water inlet end of the sand setting well, and a cleaning component arranged at the joint of the first-stage drainage ditch and the second-stage drainage ditch. The cleaning component comprises an intercepting dam arranged at the joint of the first-stage drainage ditch and the second-stage drainage ditch, and a first-stage dredging hole and a second-stage dredging hole which are used for flushing sludge are formed in the side of the intercepting dam; the first-stage desilting holes and the second-stage desilting holes are formed in the intercepting dam at the joint of the first-stage drainage ditch and the second-stage drainage ditch, water flows out of the first-stage desilting holes through the first-stage drainage ditch, the water flow cross section is suddenly reduced when the water flows through the desilting holes, the water flows are pressurized, a silt layer at the bottom of the second-stage drainage ditch is scoured, and the water flow is dredged. Dredging is achieved, and accumulated sludge is prevented from being manually cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of gravity dredging, in particular to a gravity dredging device for a dock drainage ditch. Background Technique

[0002] With the continuous development of port and dock projects, the drainage ditch, as an important part of it, undertakes the important tasks of drainage and ensuring the safety of the dock. However, due to the long-term erosion and sedimentation of pollutants, siltation often occurs at the bottom of the drainage ditch, seriously affecting the drainage effect and the normal operation of dock facilities. In order to solve the problem of silt accumulation in the drainage ditch, a new type of gravity dredging device for dock drainage ditches is needed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a gravity dredging device for a dock drainage ditch to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A gravity dredging device for a dock drainage ditch includes a primary drainage ditch, a secondary drainage ditch is arranged at the water outlet end of the primary drainage ditch, a grit chamber is arranged at the water outlet end of the secondary drainage ditch, a blocking member for intercepting garbage in the water flow is arranged at the water inlet end of the grit chamber, a cleaning member for cleaning the silt at the bottom of the secondary drainage ditch is arranged at the connection between the primary drainage ditch and the secondary drainage ditch, the cleaning member includes an intercepting dam arranged at the connection between the primary drainage ditch and the secondary drainage ditch, and a primary dredging hole and a secondary dredging hole for flushing silt are arranged on the side of the intercepting dam.

[0005] Preferably, the primary dredging hole is arranged at the top of the secondary dredging hole.

[0006] Preferably, the blocking member includes a limit slot, the limit slots are symmetrically arranged on the inner wall of the water outlet end of the secondary drainage ditch, and a grille is inserted through the top of the limit slot.

[0007] Preferably, a handle is fixedly connected to the top of the grille.

[0008] Preferably, a primary closed cover plate is arranged on the top of the primary drainage ditch, and a secondary closed cover plate is arranged on the top of the secondary drainage ditch.

[0009] Preferably, an inspection cover is arranged on the top of the grit chamber.

[0010] The technical effects and advantages of the utility model:

[0011] The utility model is provided with an interception dam at the connection of the primary drainage ditch and the secondary drainage ditch. The primary dredging hole and the secondary dredging hole arranged on the side of the interception dam are used for draining water. The primary drainage ditch discharges water from the primary dredging hole, scouring the silt layer at the bottom of the secondary drainage ditch. The blocking member at the end of the secondary drainage ditch intercepts the sundries in the scoured sewage. The secondary dredging hole serves as a standby drainage hole to drain excess rainwater when the rainfall is too large. This design utilizes the sudden reduction of the water passing section when the water flows through the dredging hole to pressurize the water flow, bringing the silt and sundries at the bottom of the slope to the water outlet to achieve silt cleaning, avoiding manual cleaning of the accumulated silt. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a sectional view of the whole of the utility model.

[0013] Figure 2 is a top view of the whole of the utility model.

[0014] Figure 3 is a front view of the grille of the utility model.

[0015] In the figure: 1, primary drainage ditch; 2, secondary drainage ditch; 3, primary closed cover plate; 4, secondary closed cover plate; 5, interception dam; 501, primary dredging hole; 502, secondary dredging hole; 6, limit slot; 7, grille; 701, handle; 8, grit chamber; 801, inspection cover. SPECIFIC EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] The present utility model provides a gravity silt cleaning device for a wharf drainage ditch as shown in Figures 1 - 3 which includes a primary drainage ditch 1. A secondary drainage ditch 2 is arranged at the water outlet end of the primary drainage ditch 1. A grit chamber 8 is arranged at the water outlet end of the secondary drainage ditch 2;

[0018] It should be noted that the hydraulic gradient of the primary drainage ditch 1 is greater than that of the secondary drainage ditch 2. A hole is opened on the side of the grit chamber 8, and the gap at the connection of this hole and the secondary drainage ditch 2 is sealed by concrete pouring. An inspection cover 801 is arranged at the top of the grit chamber 8 to facilitate the staff to enter the grit chamber 8 for regular cleaning of the sludge;

[0019] A blocking member for intercepting the garbage in the water flow is arranged at the water inlet end of the grit chamber 8;

[0020] Specifically, the blocking member includes a limit slot 6, which is symmetrically arranged on the inner wall of the water outlet end of the secondary drainage ditch 2. A grille 7 is inserted and connected to the top of the limit slot 6, and a handle 701 is fixedly connected to the top of the grille 7.

[0021] It should be noted that the limit slot 6 is made of channel steel, and it is fixedly connected to the inner wall of the secondary drainage ditch 2 by concrete pouring. The grille 7 is used to intercept sundries in the sewage to prevent them from falling into the grit chamber 8. The handle 701 and the grille 7 are both made of stainless steel and are fixed into a whole by welding. The handle 701 facilitates the cleaning of the grille 7 to avoid blockage of sundries and affect the water flow.

[0022] A cleaning member is provided at the connection between the primary drainage ditch 1 and the secondary drainage ditch 2 for cleaning the silt at the bottom of the secondary drainage ditch 2.

[0023] Specifically, the cleaning member includes an intercepting dam 5 provided at the connection between the primary drainage ditch 1 and the secondary drainage ditch 2. First-stage silt-clearing holes 501 and second-stage silt-clearing holes 502 for flushing silt are opened on the side of the intercepting dam 5.

[0024] It should be noted that the first-stage silt-clearing holes 501 are provided at the top of the second-stage silt-clearing holes 502. The inner wall of the bottom of the second-stage silt-clearing holes 502 is on the same inclined plane as the slope bottom of the secondary drainage ditch 2. Since the hydraulic gradient of the primary drainage ditch 1 is greater than that of the secondary drainage ditch 2, silt will accumulate at the slope bottom of the secondary drainage ditch 2. Due to the blocking effect of the silt on the second-stage silt-clearing holes 502, the water level line in the primary drainage ditch 1 rises. Due to the gravitational potential energy of the water body, the cross-sectional area of the water flow passing through the first-stage silt-clearing holes 501 suddenly shrinks, resulting in an increase in the flow velocity of the water flowing out of the first-stage silt-clearing holes 501, scouring the silt layer of the secondary drainage ditch 2, thereby achieving the purpose of silt cleaning.

[0025] When the precipitation is too large, the second-stage silt-clearing holes 502 serve as backup drainage holes, and the water flow can break through the blockage of the silt layer and flow out through the second-stage silt-clearing holes 502. Due to the mixing of the water flowing out at different velocities from the first-stage silt-clearing holes 501 and the second-stage silt-clearing holes 502, the water flow at the top of the secondary drainage ditch 2 becomes turbulent, accelerating the scouring and cleaning of the silt layer.

[0026] A first-stage closed cover plate 3 is provided at the top of the primary drainage ditch 1, and a second-stage closed cover plate 4 is provided at the top of the secondary drainage ditch 2. Both the first-stage closed cover plate 3 and the second-stage closed cover plate 4 are designed with hollow openings to facilitate the inflow of rainwater and the like into the primary drainage ditch 1 and the secondary drainage ditch 2.

[0027] In the actual use process, an intercepting dam 5 is arranged at the connection of the primary drainage ditch 1 and the secondary drainage ditch 2. By using the primary silt cleaning hole 501 and the secondary silt cleaning hole 502 arranged on the side of the intercepting dam 5 for drainage operation, the primary drainage ditch 1 discharges water flow from the primary silt cleaning hole 501 to scour the silt layer at the bottom of the secondary drainage ditch 2. The blocking member at the end of the secondary drainage ditch 2 intercepts the sundries in the scoured sewage to prevent them from entering the grit chamber 8. This design utilizes the sudden reduction of the water passing section when the water flow passes through the silt cleaning holes to pressurize the water flow, bringing the silt and sundries at the bottom slope of the secondary drainage ditch 2 to the water outlet to achieve silt cleaning, avoiding manual cleaning of the accumulated silt.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gravity dredging device for a dock drainage ditch, comprising a primary drainage ditch (1), characterized in that: A secondary drainage ditch (2) is arranged at the outlet end of the primary drainage ditch (1), a sand settling well (8) is arranged at the outlet end of the secondary drainage ditch (2), a blocking component for intercepting garbage in the water flow is arranged at the water inlet end of the sand settling well (8), a cleaning component for cleaning sludge at the bottom of the secondary drainage ditch (2) is arranged at the connection between the primary drainage ditch (1) and the secondary drainage ditch (2), the cleaning component comprises an interception dam (5) arranged at the connection between the primary drainage ditch (1) and the secondary drainage ditch (2), and a primary silt cleaning hole (501) and a secondary silt cleaning hole (502) for flushing sludge are opened on the side of the interception dam (5).

2. A gravity dredging device for a dock drainage ditch according to claim 1, characterized in that: The first-level silt removal hole (501) is arranged on the top of the second-level silt removal hole (502).

3. A gravity dredging device for a dock drainage ditch according to claim 1, characterized in that: The blocking component comprises a limiting slot (6), the limiting slot (6) being symmetrically arranged on the inner wall of the water outlet end of the secondary drainage ditch (2), and a grille (7) being inserted and connected to the top of the limiting slot (6).

4. A gravity dredging device for a dock drainage ditch according to claim 3, characterized in that: A handle (701) is fixedly connected to the top of the grille (7).

5. The gravity dredging device for a dock drainage ditch according to claim 1, characterized in that: A primary closed cover plate (3) is provided on the top of the primary drainage ditch (1), and a secondary closed cover plate (4) is provided on the top of the secondary drainage ditch (2).

6. A gravity dredging device for a dock drainage ditch according to claim 1, characterized in that: An inspection cover (801) is provided on the top of the sand settling well (8).

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