Sludge inlet for pneumatic pump

Abstract

The invention relates to a sludge inlet for a pneumatic pump, the sludge inlet is a hollow cavity enclosed by a top plate, a side plate, a rear plate and a bottom plate, the rear plate is provided with a sludge outlet communicated with a suction port of the pneumatic pump, a grating is arranged between the top plate and the bottom plate, and the bottom plate and the grating are provided with a cavity and a nano ventilation hole channel. By arranging the air cushion structure on the related surface of the sludge inlet and screening the wear-resistant non-stick materials, the problem that the sludge inlet is blocked by sticky sludge in the actual dredging engineering is effectively solved, the dredging effect of the pneumatic pump is improved, and due to the fact that actual wear is reduced and the wear resistance of the materials is improved, the service life of the pneumatic pump is prolonged. And the service life of the sludge inlet is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to a mud inlet device for a dredging and desilting pump, and in particular to a mud inlet of a pneumatic desilting pump which will not cause the phenomenon of mud adhering and clogging the mud inlet. Background Art

[0002] As we all know, pneumatic dredging pumps are dredging equipment widely used in underwater environmental dredging projects. They are dredging equipment that uses compressed air as a power to press and send out the mud that enters the pump body under the action of water level pressure difference. The front end of the pneumatic pump is equipped with a mud inlet, which is responsible for collecting and transporting the dredged sludge into the pump body of the pneumatic pump. When the pneumatic pump is performing dredging operations, the dredging process of anchor traction and strip-shaped partition construction is adopted. The pneumatic pump is lowered into the silt layer through a hanger or cantilever, and then the pneumatic pump is pulled forward by the anchor chain. The silt at the front end of the pneumatic pump enters the pump body through the mud inlet under the suction and pushing action of the pneumatic pump. The pneumatic pump uses the water pressure to press the bottom sludge directly into the pneumatic pump through the mud inlet. There is no process of mechanically crushing the bottom sludge or forced stirring and mixing during the mud feeding process. The bottom sludge passes through the mud inlet and enters the pump body in its original state. The original ecological state of the bottom mud is in a flaky and sticky state. It is divided by the mesh grille when passing through the mud inlet grille. Therefore, the bottom mud will produce a large viscous resistance when passing through the mud inlet grille; if the bottom mud is mainly composed of clay, the mud will easily adhere to the grille when passing through the grille, causing the mud inlet to be blocked. Moreover, even after the viscous silt enters the mud inlet, during the process of being transported from the mud inlet to the suction port of the pneumatic pump, the viscous silt will also produce a large viscous resistance on the bottom plate of the mud inlet, and it is very easy to cause the accumulation and blockage of viscous silt inside the mud inlet. The above two situations will cause the pneumatic pump to be unable to suck the silt normally, seriously affecting the progress of the dredging construction. For this reason, it is necessary to reduce the resistance of the pneumatic pump mud inlet grille and bottom plate from the structural point of view to avoid the occurrence of viscous clogging and ensure the normal operation of the pneumatic pump dredging and desilting project.

[0003] Ultra-molecular weight polyethylene (UPE) has excellent self-lubrication and anti-adhesion properties, and its anti-adhesion ability is second only to polytetrafluoroethylene, which has the best non-stick properties. Therefore, it is difficult for the surface of the product to adhere to other materials. In addition, ultra-molecular weight polyethylene (UPE) also has wear resistance and impact resistance that ordinary polyethylene and other engineering plastics cannot match. It is the preferred material for making pneumatic pump mud inlets that require excellent wear resistance and non-stick properties. Summary of the invention

[0004] The purpose of the present invention is to provide a mud inlet for a pneumatic pump in view of the above problems. The mud inlet has a simple structure and is easy to manufacture, and can fundamentally solve the problem of viscous resistance between the pneumatic pump mud inlet grille and the bottom plate, avoid the occurrence of adhesion and clogging, and ensure the normal operation of the pneumatic pump dredging and desilting project.

[0005] The objective of the present invention is achieved through the following technical scheme: A mud inlet for a pneumatic pump, the mud inlet is a cavity surrounded by a top plate, a side plate, a rear plate and a bottom plate, a mud outlet connected to a suction port of the pneumatic pump is provided on the rear plate, a grille is provided between the top plate and the bottom plate, and the feature is that cavities and nano-ventilation channels are provided on the bottom plate and the grille.

[0006] Furthermore, the mud inlet for the pneumatic pump is characterized in that the bottom plate is a composite plate composed of an upper bottom plate and a lower bottom plate, the upper bottom plate is made of UPE nano-through-hole foam material, and the lower bottom plate is preferably made of steel plate, and may also be other metal materials.

[0007] Furthermore, the mud inlet for the pneumatic pump is characterized in that: the lower base plate is a hollow plate containing a cavity, and a plurality of ventilation holes penetrating the cavity are formed on the upper surface of the lower base plate.

[0008] Furthermore, the mud inlet for the pneumatic pump is characterized in that: a groove is also provided on the upper surface of the lower base plate, and the groove depth is not greater than 2 mm; by providing shallow grooves on the upper surface of the lower base plate, it is ensured that the lower base plate itself has sufficient strength and sufficient rigidity support for the upper base plate, and the compressed air ejected from the vent can be quickly dispersed to the entire upper surface of the lower base plate through the grooves, thereby reducing the diffusion resistance of the compressed air.

[0009] Furthermore, the mud inlet for the pneumatic pump is characterized in that the grille is a mesh structure formed by hollow tubes that are staggered horizontally and vertically and interconnected, and the outer wall of the hollow tube is adhered to an outer tube made of UPE nano-porous foam material; the material of the hollow tube is preferably steel pipe, but it can also be other metal materials.

[0010] Furthermore, the mud inlet for the pneumatic pump is characterized in that a plurality of air outlet holes which are in communication with the interior of the hollow tube are provided on the tube wall of the hollow tube.

[0011] Furthermore, the mud inlet for the pneumatic pump is characterized in that a groove is also provided on the outer surface of the hollow tube, and the depth of the groove is not greater than 2 mm; by providing the groove on the outer surface of the hollow tube, it is ensured that the hollow tube itself has sufficient strength and sufficient rigidity support for the outer tube, and the compressed air ejected from the air outlet can be quickly dispersed to the entire outer surface of the hollow tube through the groove, thereby reducing the diffusion resistance of the compressed air.

[0012] Furthermore, the mud inlet for the pneumatic pump is characterized in that the pores of the UPE nano-through-pore foam material are three-dimensional network pipelines that are interconnected, and the pore size of the nano-through-pores is 10nm-100nm.

[0013] Furthermore, the mud inlet for the pneumatic pump is characterized in that the cavity of the bottom plate is connected to the cavity of the grille.

[0014] Furthermore, the mud inlet for the pneumatic pump is characterized in that the grooves or recesses are of a mesh structure.

[0015] The mud inlet for the pneumatic pump of the present invention, in actual dredging and silting operations, by inputting compressed air into the hollow cavity of the mud inlet bottom plate and the grille, the compressed air is evenly diffused to the outer surface of the grille and the upper surface of the bottom plate through the three-dimensional channel of the nano-porous foam material, and an air cushion isolation layer can be formed on the outer surface of the mud inlet grille and the upper surface of the bottom plate, which can not only greatly reduce the mud inlet resistance, accelerate the mud inlet speed of the pneumatic pump, and improve the working efficiency of the pneumatic pump, but also effectively prevent the sticky sludge from adhering to the mud inlet grille and the bottom plate, and completely solve the problem of sticky sludge blocking the mud inlet. By controlling the pressure and flow rate of the compressed air, it is possible to ensure the continuity and uniformity of the formation of the air cushion, and it is possible to ensure that the gas in the air cushion can be sucked into the pump body by the pneumatic pump together with the sludge, so as to avoid the gas diffusing into the environment and causing secondary pollution of the water body. The pneumatic pump itself uses compressed air as the power for conveying sludge, so the gas in the air cushion enters the pump body of the pneumatic pump together with the sludge, and will not have a negative impact on the working performance of the pneumatic pump.

[0016] The air cushion supporting the sludge inlet of the pneumatic pump of the present invention is generated by a three-dimensional mesh nano-porous foam material. The nano-pores on the outer surface of the mud inlet grille and the bottom plate have a pore diameter much smaller than the diameter of general solid particles in the sludge, which can effectively prevent the solid particles of the sludge from entering the pores and clogging the pores, thereby ensuring the reliability of the air cushion mud inlet.

[0017] The mud inlet for the pneumatic pump of the present invention, the mud inlet grille and the bottom plate adopt a composite structure of UPE material and steel plate material, fully utilizing the excellent non-stickiness, wear resistance and impact resistance of the UPE material, greatly improving the anti-adhesion and clogging ability and service life of the mud inlet of the pneumatic pump, while the use of the metal frame also provides sufficient rigidity support for the mud inlet.

[0018] The mud inlet for the pneumatic pump of the present invention, by arranging an air cushion structure on the relevant surface of the mud inlet and selecting wear-resistant and non-stick materials, not only effectively solves the problem of sticky silt sticking and blocking the mud inlet in actual dredging projects, thereby improving the silt clearing effect of the pneumatic pump, but also greatly extends the service life of the mud inlet due to the reduction of actual wear and the improvement of material wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural stereogram of embodiment 1 of the present invention.

[0020] Figure 2 It is a front view of embodiment 1 of the present invention.

[0021] Figure 3 It is a top view of embodiment 1 of the present invention.

[0022] Figure 4 It is a right view of embodiment 1 of the present invention.

[0023] Figure 5 The present invention Figure 2 AA section view.

[0024] Figure 6 The present invention Figure 5 Partial view of B.

[0025] Figure 7 It is a structural stereogram of the lower base plate of Example 1 of the present invention.

[0026] Figure 8 It is a top view of the lower base plate of Example 1 of the present invention.

[0027] Fig. 9 It is a right side view of the lower base plate of embodiment 1 of the present invention.

[0028] Fig.10 It is a structural stereogram of the grid hollow tube according to Example 1 of the present invention.

[0029] Fig.11 1 is a top view of the grid hollow tube according to Example 1 of the present invention.

[0030] Fig.12 The present invention Fig.11 CC section view.

[0031] Fig.13 It is a structural stereogram of the lower base plate of Example 2 of the present invention.

[0032] Fig.14 It is a top view of the lower base plate of embodiment 2 of the present invention.

[0033] Fig.15 The present invention Fig.14 Partial view of D.

[0034] Fig.16 It is a right side view of the lower base plate of embodiment 2 of the present invention.

[0035] Fig.17 It is a structural stereogram of the grid hollow tube according to Example 2 of the present invention.

[0036] Fig.18 The present invention Fig.17 Partial view of E.

[0037] Fig.19 It is a structural stereogram of the lower base plate of Example 3 of the present invention.

[0038] Fig. 20 The present invention Fig.19 Partial view of G.

[0039] Fig.21 It is a structural stereogram of the grid hollow tube of Example 3 of the present invention.

[0040] Fig. 22 It is a structural stereogram of the lower base plate of embodiment 4 of the present invention.

[0041] Fig.23 The present invention Fig. 22 Partial view of H.

[0042] Fig.24 It is a structural stereogram of the grid hollow tube according to Example 4 of the present invention.

[0043] Fig.25 The present invention Fig.24 Partial view of I. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] Example 1, see attached Figure 1-12 The mud inlet for the pneumatic pump is a hollow cavity surrounded by a top plate 1, a side plate 2, a rear plate 3 and a bottom plate 4. A mud outlet 5 connected to the suction port of the pneumatic pump is provided on the rear plate 3. A grille 6 is also provided between the top plate 1 and the bottom plate 4. The grille 6 is a mesh structure formed by interlacing and connecting hollow steel pipes 6.1 horizontally and vertically. An outer tube 6.2 made of UPE nano-porous foam material is attached to the outer wall of the hollow pipe 6.1. The nano-porous foam material is a three-dimensional mesh pipeline structure with mutually interpenetrating channels, and the channel diameter is 50nm. The pipe wall of the hollow pipe 6.1 is provided with air outlet holes 6.1.1 that are connected to the inside of the hollow pipe on both sides perpendicular to the mud inlet direction. The air outlet holes 6.1.1 are gaps with a width of 3mm extending along the axial direction of the inner pipe. The bottom plate 4 is a composite plate composed of an upper bottom plate 4.1 and a lower bottom plate 4.2. The upper bottom plate 4.1 is made of UPE nanoporous foam material, which is a three-dimensional mesh pipeline structure with mutually interpenetrating channels, and the channel diameter is 50nm; the lower bottom plate 4.2 is a hollow steel plate containing a cavity 4.2.2, and a plurality of vents 4.2.1 are provided on its upper surface, which are interpenetrating cavities 4.2.2, and the vents 4.2.1 are long strips of holes extending laterally with a width of 3mm; the cavity 4.2.2 is connected to the hollow tube 6.1 through an opening 4.2.3 provided on the upper surface of the lower bottom plate 4.2. An air supply pipe 7 is also provided above the top plate 1, which is connected to the hollow tube 6.1, and an air inlet 7.1 is provided on the air supply pipe 7, which is connected to the air compressor.

[0046] When performing dredging operations, compressed air is first introduced into the air supply pipe 7, and then the mud inlet of the pneumatic pump is lowered into the underwater mud; the compressed air in the air supply pipe 7 first enters the hollow tube 6.1, and a part of the gas enters the nanopores of the outer tube 6.2 through the air outlet 6.1.1, and the compressed air diffuses to the entire outer surface of the outer tube 6.2 through the three-dimensional nanopores to form an air cushion; another part of the gas in the hollow tube 6.1 enters the lower bottom plate cavity 4.2.2 through the lower bottom plate opening 4.2.3, and then enters the nanopores of the upper bottom plate 4.1 through the air vent 4.2.1, and the compressed air diffuses to the entire upper surface of the bottom plate 4 through the three-dimensional nanopores to form an air cushion. Under the suction action of the pneumatic pump, the underwater mud flows through the gaps between the grids 6 and enters the pneumatic pump body through the mud inlet. The silt is lifted by the buoyancy of the air cushion on the outer surface of the grille 6 and the upper surface of the bottom plate 4 and does not come into physical contact with the outer surface of the grille 6 and the upper surface of the bottom plate 4. Therefore, the silt will not adhere to the outer surface of the grille 6 and the upper surface of the bottom plate 4 to cause blockage; at the same time, due to the lifting of the silt by the air cushion, the resistance to the silt flow is greatly reduced, the sludge feeding speed of the pneumatic pump is accelerated, and the working efficiency of the pneumatic pump is improved.

[0047] Example 2, see attached Figure 13-18 , the mud inlet for the pneumatic pump, the upper surface of the lower bottom plate 4.2 is provided with a plurality of vent holes 4.2.1 penetrating the cavity 4.2.2, the vent holes 4.2.1 are long holes extending transversely with a width of 1mm; the upper surface of the lower bottom plate 4.2 is also provided with a plurality of grooves 4.2.4 with a depth of 1mm. The wall of the hollow tube 6.1 is provided with air outlet holes 6.1.1 penetrating the inside of the hollow tube on both sides perpendicular to the mud inlet direction, the air outlet holes 6.1.1 are gaps extending along the axial direction of the inner tube with a width of 1mm; the outer surface of the hollow tube 6.1 is also provided with a spiral groove with a depth of 1mm. By providing grooves 4.2.4 on the upper surface of the lower bottom plate 4.2 and grooves 6.1.2 on the outer surface of the hollow tube 6.1, it is ensured that the lower bottom plate 4.2 and the hollow tube 6.1 have sufficient rigidity support, and the compressed air can be quickly dispersed to the entire lower bottom plate and the outer surface of the hollow tube through the grooves and spiral grooves, reducing the diffusion resistance of the compressed air and reducing energy consumption. The pore diameter of the nanoporous foam material of the upper bottom plate 4.1 and the outer tube 6.2 is 10nm. The rest of the structure is shown in Example 1.

[0048] Example 3, see attached Figure 19-21, a mud inlet for a pneumatic pump, a plurality of vent holes 4.2.1 are provided on the upper surface of the lower bottom plate 4.2 and are connected to the cavity 4.2.2, and the vent holes 4.2.1 are circular holes with a diameter of 3 mm; the upper and lower sides, front and rear sides, and left and right sides of the tube wall of the hollow tube 6.1 are provided with air outlet holes 6.1.1 that are connected to the inside of the hollow tube, and the air outlet holes 6.1.1 are circular holes with a diameter of 2 mm. The pore diameter of the nanoporous foam material of the upper bottom plate 4.1 and the outer tube 6.2 is 100 nm. The rest of the structure is referred to in Example 1.

[0049] Example 4, see attached Figure 22-25 , a mud inlet for a pneumatic pump, a mesh groove 4.2.4 with a depth of 2 mm is provided on the upper surface of the lower bottom plate 4.2, a vent hole 4.2.1 penetrating with the cavity 4.2.2 is provided in the mesh groove 4.2.4; a mesh groove 6.1.2 with a depth of 1 mm is provided on the outer wall of the hollow tube 6.1, a vent hole 6.1.1 penetrating with the inside of the hollow tube is provided in the mesh groove 6.1.2. The rest of the structure is shown in Example 1.

[0050] Although the present invention has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various changes can be made without departing from the spirit and scope of the present invention.

Claims

1. A mud inlet for a pneumatic pump, the mud inlet being a cavity surrounded by a top plate (1), a side plate (2), a rear plate (3) and a bottom plate (4), the rear plate (3) being provided with a mud outlet (5) connected to a suction port of the pneumatic pump, and a grille (6) being provided between the top plate (1) and the bottom plate (4), characterized in that: The bottom plate (4) and the grille (6) are provided with cavities and nano-ventilation channels.

2. The mud inlet for a pneumatic pump according to claim 1, characterized in that: The bottom plate (4) is a composite plate composed of an upper bottom plate (4.1) and a lower bottom plate (4.2); the upper bottom plate (4.1) is made of UPE nano-porous foam material, and the material of the lower bottom plate (4.2) is preferably a steel plate.

3. The mud inlet for a pneumatic pump according to claim 2, characterized in that: The lower base plate (4.2) is a hollow plate containing a cavity (4.2.2), and a plurality of vent holes (4.2.1) that penetrate the cavity (4.2.2) are formed on the upper surface of the lower base plate.

4. The mud inlet for a pneumatic pump according to claim 3, characterized in that: The upper surface of the lower base plate (4.2) is also provided with a groove (4.2.4), and the depth of the groove is not greater than 2 mm.

5. The mud inlet for a pneumatic pump according to claim 1, characterized in that: The grid (6) is a mesh structure formed by hollow tubes (6.1) that are connected horizontally and vertically and are interconnected. The outer wall of the hollow tube (6.1) is attached with an outer tube (6.2) made of UPE nano-porous foam material. The hollow tube (6.1) is preferably made of steel tube.

6. The mud inlet for a pneumatic pump according to claim 5, characterized in that: A plurality of air outlet holes (6.1.1) which are in communication with the interior of the hollow tube (6.1) are provided on the tube wall of the hollow tube (6.1).

7. The mud inlet for a pneumatic pump according to claim 5, characterized in that: The outer surface of the hollow tube (6.1) is also provided with a groove (6.1.2), the depth of the groove being no greater than 2 mm.

8. The mud inlet for a pneumatic pump according to claim 2 or 5, characterized in that: The pores of the UPE nano-through-hole foam material are three-dimensional network pipelines that are interconnected, and the pore diameter of the nano-through-holes is 10nm-100nm.

9. The mud inlet for a pneumatic pump according to claim 1, characterized in that: The cavity of the bottom plate (4) is in communication with the cavity of the grille (6).

10. The mud inlet for a pneumatic pump according to claim 4 or 7, characterized in that: The grooves (4.2.4) or recesses (6.1.2) are of a mesh structure.

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