Sludge inlet for pneumatic pump

Abstract

The utility model 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 that does not cause mud to stick and clog the mud inlet. Background Art

[0002] As we all know, pneumatic dredging pumps are widely used in underwater environmental dredging projects. They use compressed air as a power source to pressurize and expel mud that has entered the pump body due to water pressure differentials. A mud inlet is located at the front of the pneumatic pump, which is responsible for collecting and transporting dredged mud into the pump body. During dredging operations, the pneumatic pump utilizes an anchor-pulling, strip-type dredging process. The pneumatic pump is lowered into the mud layer via a hanger or cantilever, then pulled forward by an anchor chain. The mud at the front of the pneumatic pump is drawn and pushed through the mud inlet into the pump body by the pump's suction and push action. The pneumatic pump utilizes water pressure to force the underwater mud directly into the pump through the mud inlet. The mud inlet process does not involve mechanical crushing or forced mixing of the bottom mud. The bottom mud passes through the mud inlet and enters the pump body in its original state. In its original state, underwater silt is flaky and sticky, and is separated by the mesh grille as it passes through the mud inlet. Therefore, the underwater silt generates significant viscous resistance when passing through the mud inlet grille. If the underwater silt is primarily composed of clay, the silt easily adheres to the grille as it passes through, causing blockage in the mud inlet. Furthermore, even after the viscous silt enters the mud inlet, it generates significant viscous resistance on the mud inlet floor during the process of being transported from the mud inlet to the pneumatic pump suction port, easily causing viscous silt accumulation and blockage within the mud inlet. Both of these situations prevent the pneumatic pump from properly pumping silt, seriously impacting the dredging operation progress. Therefore, it is necessary to structurally reduce the resistance of the pneumatic pump mud inlet grille and floor to prevent viscous blockage 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, second only to polytetrafluoroethylene (PTFE), 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 are unmatched by ordinary polyethylene and other engineering plastics. 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 present invention aims to address the above-mentioned problems by providing a pneumatic pump mud inlet. This mud inlet has a simple structure, is easy to manufacture, and can fundamentally solve the problem of viscous resistance between the pneumatic pump mud inlet grille and the bottom plate, thus avoiding the occurrence of adhesion and clogging, and ensuring the normal operation of pneumatic pump dredging and desilting projects.

[0005] The objective of the present invention is achieved through the following technical solution: A mud inlet for a pneumatic pump, the mud inlet is a cavity surrounded by a top plate, side plates, a rear plate and a bottom plate, a mud outlet connected to the suction port of the pneumatic pump is provided on the rear plate, and a grille is provided between the top plate and the bottom plate, which is characterized in 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 consisting of an upper bottom plate and a lower bottom plate, the upper bottom plate is made of UPE nano-porous foam material, and the lower bottom plate is preferably made of steel plate, but can also be made of 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 opened on the upper surface of the 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 with an outer tube made of UPE nanoporous 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 communicating 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 nanoporous foam material are three-dimensional network pipelines that are interconnected, and the pore diameter of the nanopores is 10nm-100nm.

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

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

[0015] The pneumatic pump inlet of the present invention, during actual dredging and desilting operations, inputs compressed air into the hollow cavities of the inlet base plate and grille. The compressed air diffuses evenly through the three-dimensional channels of the nanoporous foam material to the outer surface of the grille and the upper surface of the base plate, forming an air cushion isolation layer on the outer surface of the inlet grille and the upper surface of the base plate. This not only greatly reduces the resistance to mud inflow, accelerates the mud inflow speed of the pneumatic pump, and improves the working efficiency of the pneumatic pump, but also effectively prevents sticky silt from adhering to the inlet grille and base plate, completely solving the problem of sticky silt blocking the inlet. By controlling the pressure and flow rate of the compressed air, the continuity and uniformity of the air cushion can be ensured, and the gas in the air cushion can be sucked into the pump body along with the silt by the pneumatic pump, preventing the gas from diffusing into the environment and causing secondary contamination of the water body. Since the pneumatic pump itself uses compressed air as the power to transport silt, the gas in the air cushion enters the pneumatic pump body along with the silt, without negatively affecting the working performance of the pneumatic pump.

[0016] The air cushion supporting the mud 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 that is much smaller than the diameter of general solid particles in the mud. It can effectively prevent solid particles in the mud 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-stick properties, 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 adhering to and clogging the mud inlet in actual dredging projects, thereby improving the dredging 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 the wear resistance of the material. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 5 This invention Figure 2 AA section view.

[0024] Figure 6 This 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 1 is a top view of the lower base plate of Example 1 of the present invention.

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

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

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

[0030] Figure 12 This invention Figure 11 CC section view.

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

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

[0033] Figure 15 This invention Figure 14 Partial view of D.

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

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

[0036] Figure 18 This invention Figure 17 Partial view of E.

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

[0038] Figure 20 This invention Figure 19 Partial view of G.

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

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

[0041] Figure 23 This invention Figure 22 Partial view of H.

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

[0043] Figure 25 This invention Figure 24 Partial view of I. DETAILED DESCRIPTION

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

[0045] Example 1, see attached Figure 1-12 The pneumatic pump mud inlet is a hollow cavity surrounded by a top plate 1, side plates 2, a rear plate 3, and a bottom plate 4. The rear plate 3 is provided with a mud outlet 5 connected to the pneumatic pump suction port. 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 interlaced and interconnected hollow steel tubes 6.1 in a horizontal and vertical manner. The outer wall of the hollow tube 6.1 is bonded with an outer tube 6.2 made of UPE nanoporous foam material. This nanoporous foam material has a three-dimensional mesh pipeline structure with interconnected channels and a channel diameter of 50nm. The wall of the hollow tube 6.1 is provided with air outlet holes 6.1.1 on both sides perpendicular to the mud inlet direction, which penetrate the interior of the hollow tube. The air outlet holes 6.1.1 are 3mm wide slits extending along the axial direction of the inner tube. The base plate 4 is a composite plate consisting of an upper base plate 4.1 and a lower base plate 4.2. The upper base plate 4.1 is made of UPE nanoporous foam material, which has a three-dimensional network of interconnected channels with a diameter of 50 nm. The lower base plate 4.2 is a hollow steel plate containing a cavity 4.2.2. Its upper surface is provided with a plurality of vent holes 4.2.1 extending horizontally and 3 mm wide, which intersect with the cavity 4.2.2. The cavity 4.2.2 is connected to the hollow tube 6.1 through an opening 4.2.3 on the upper surface of the lower base plate 4.2. The top plate 1 also has an air supply pipe 7 connected to the hollow tube 6.1. The air supply pipe 7 has an air inlet 7.1 connected to the air compressor.

[0046] During dredging operations, compressed air is first introduced into the air supply pipe 7, and then the pneumatic pump inlet is lowered into the underwater mud. The compressed air in the air supply pipe 7 first enters the hollow tube 6.1, where a portion of the air enters the nanopores of the outer tube 6.2 through the air outlet 6.1.1. The compressed air diffuses through the three-dimensional nanopores to the entire outer surface of the outer tube 6.2, forming an air cushion. Another portion of the air in the hollow tube 6.1 enters the lower base plate cavity 4.2.2 through the lower base plate opening 4.2.3, and then enters the nanopores of the upper base plate 4.1 through the air vent 4.2.1. The compressed air diffuses through the three-dimensional nanopores to the entire upper surface of the base plate 4, forming an air cushion. Under the suction of the pneumatic pump, the underwater mud flows through the gaps between the grilles 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 support of the air cushion on the silt, the resistance to the silt flow is greatly reduced, the silt 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 pneumatic pump mud inlet has several vent holes 4.2.1 on the upper surface of the lower base plate 4.2, which extend through the cavity 4.2.2. These vent holes 4.2.1 are elongated, 1mm wide holes extending laterally. The upper surface of the lower base plate 4.2 also has several grooves 4.2.4, each 1mm deep. On either side of the hollow tube 6.1's wall, perpendicular to the mud inlet direction, are vent holes 6.1.1, which extend through the interior of the hollow tube. These vent holes 6.1.1 are 1mm wide slits extending axially along the inner tube. The outer surface of the hollow tube 6.1 also has a 1mm deep spiral groove. By providing grooves 4.2.4 on the upper surface of lower base plate 4.2 and grooves 6.1.2 on the outer surface of hollow tube 6.1, lower base plate 4.2 and hollow tube 6.1 are ensured to have sufficient rigidity and support. Furthermore, compressed air can be quickly dispersed throughout the lower base plate and outer surface of the hollow tube through the grooves and spiral grooves, reducing diffusion resistance and energy consumption. The pore diameter of the nanoporous foam material in upper base plate 4.1 and outer tube 6.2 is 10 nm. For the remaining structure, refer to Example 1.

[0048] Example 3, see attached Figure 19-21The pneumatic pump has a mud inlet. The upper surface of the lower base plate 4.2 is provided with a plurality of 3mm diameter air holes 4.2.1 that connect to the cavity 4.2.2. The air holes 4.2.1 are circular holes with a diameter of 3mm. The hollow tube 6.1 has air outlet holes 6.1.1 on the upper and lower sides, front and back sides, and left and right sides that connect to the interior of the hollow tube. The nanoporous foam material in the upper base plate 4.1 and outer tube 6.2 has a pore diameter of 100nm. The remaining structure is similar to that of Example 1.

[0049] Example 4, see attached Figure 22-25 The pneumatic pump mud inlet has a mesh groove 4.2.4 with a depth of 2mm on the upper surface of the lower base plate 4.2.4, which contains a vent hole 4.2.1 that connects to the cavity 4.2.2. The outer wall of the hollow tube 6.1 has a mesh groove 6.1.2 with a depth of 1mm, which contains an air outlet hole 6.1.1 that connects to the interior of the hollow tube. For the rest of the structure, refer to 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 invention.

Claims

1. A mud inlet for a pneumatic pump, the mud inlet being a cavity surrounded by a top plate (1), side plates (2), a rear plate (3) and a bottom plate (4), a mud outlet (5) communicating with a suction port of the pneumatic pump being provided on the rear plate (3), 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-through-hole foam material, and the lower bottom plate (4.2) is made of 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 are in communication with the cavity (4.2.2) are provided on its upper surface.

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 further provided with a groove (4.2.4), the depth of the groove being no 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 interlaced and connected hollow tubes (6.1) horizontally and vertically. The outer wall of the hollow tube (6.1) is attached with an outer tube (6.2) made of UPE nanoporous foam material. The hollow tube (6.1) is 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) that 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 further 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 nanoporous foam material are three-dimensional network pipes that are interconnected, and the pore diameter of the nanopores 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 communicated 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-like structure.

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