Projection type grid sand all-in-one machine

Abstract

The invention relates to a shielding type grid sand all-in-one machine. A liquid inlet and a sludge outlet are formed in two ends of the rack; the plurality of groups of filtering mechanisms are arranged in the rack in a stepped manner and are used for filtering large-particle sludge in a graded manner along the material flowing direction; the separating mechanism is arranged below each filtering mechanism and is used for carrying out sand-water separation on filtered filtrate; the uniform mixing mechanism is arranged between the filtering mechanism and the separating mechanism and is used for uniformly mixing filtrate; the conveying mechanism is arranged on the filtering mechanism, the lower end of the conveying mechanism extends into the uniform mixing mechanism, and the conveying mechanism is used for conveying slurry on the filtering mechanism; the squeezing mechanism is arranged above the filtering mechanism at the tail and is matched with the conveying mechanism to alternately squeeze the slurry on the filtering mechanisms; the wetting mechanism is arranged above the squeezing mechanism and is used for wetting the squeezing mechanism; the technical problems that existing equipment is low in filtering efficiency, poor in filtering effect and prone to dry grinding are solved.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a shield-type sand screen integrated machine. Background Art

[0002] Industrial wastewater refers to wastewater, sewage and waste liquid generated in the process of industrial production, which contains industrial production materials, intermediates and products lost with water, as well as pollutants generated in the production process. With the rapid development of industry, the types and quantity of wastewater have increased rapidly, and the pollution of water bodies has become increasingly widespread and serious, threatening human health and safety. For environmental protection, the treatment of industrial wastewater is more important than the treatment of urban sewage. The filtration technology for industrial wastewater treatment is mainly used to remove suspended solid particles in wastewater to meet the requirements of subsequent treatment processes or direct discharge standards.

[0003] Patent No. CN201521018252.3 discloses a triangular rotor flat-plate solid-liquid separation equipment. Since the overall carrying surface of the triangular rotor flat-plate solid-liquid separation equipment is composed of multiple guide plates, guide gaps are formed between the guide plates, so that water will be automatically separated from the solid processed material under the action of gravity; the design of the triangular rotor allows the solid processed material to be automatically conveyed on the carrying surface, and the wheelbase of the major and minor axes of the triangular rotor is similar, which makes the triangular rotor have a basically uniform rotation speed during operation, high rotation efficiency and good stability; the design of the pressing plate allows the water that cannot be automatically separated to be separated from the solid processed material after pressure is applied, which comprehensively improves the solid-liquid separation effect; this triangular rotor flat-plate solid-liquid separation equipment has the advantages of high efficiency, good stability and good separation effect.

[0004] However, in actual use, the inventors found that the existing filtration structure usually uses a dense grid bar or grid plate structure in conjunction with the rotor's conveying for filtration. If the density of the grid bars is large, the liquid filtration efficiency will be slow, affecting production efficiency; if the density of the grid bars is small, the filtration effect will be poor; and as the solid-liquid infiltration process at the front end proceeds, the moisture content in the sludge at the rear end will decrease, which will lead to dry grinding between the rotor and the grid bars at the rear end, reducing the service life of the device and increasing maintenance costs and usage costs. Summary of the invention

[0005] The purpose of the present invention is to improve the conveying efficiency of wastewater by setting multiple filtering mechanisms in coordination with conveying mechanisms, so that wastewater can be graded and filtered, with good filtering effect and high efficiency. The filtered filtrate is temporarily stored in the mixing mechanism to moisten the conveying mechanism, and the temporarily stored filtrate is mixed by the mixing mechanism and then overflows into the separation mechanism for sand and water separation. The filtered sludge is efficiently squeezed and filtered by the upper and lower corresponding pressing rotors and conveying rotors in an alternating manner, and the pressing is moistened by the moistening mechanism during the pressing process, thereby realizing the integrated sand screen function. This solves the problems of slow filtering efficiency, poor filtering effect, and easy dry grinding in the existing equipment.

[0006] In view of the above technical problems, the technical solution is as follows: a shield-type sand screen integrated machine, comprising: A frame with liquid inlet and mud outlet at both ends, a plurality of filtering mechanisms arranged in a stepped manner in the frame and filtering large-particle sludge in a graded manner along the material flow direction, a separation mechanism arranged below each of the filtering mechanisms and used to separate sand and water from the filtered filtrate, a mixing mechanism arranged between the filtering mechanism and the separation mechanism and used to mix the filtrate, a conveying mechanism arranged on the filtering mechanism and extending its lower end into the mixing mechanism and used to convey the slurry on the filtering mechanism, a pressing mechanism arranged above the last filtering mechanism and cooperating with the conveying mechanism to alternately press the slurry on the filtering mechanism, and a wetting mechanism arranged above the pressing mechanism and used to wet the pressing mechanism; The pressing mechanism includes a plurality of bars arranged on the frame at equal intervals along a direction perpendicular to the material flow, a plurality of pressing shafts rotatably arranged on the frame at equal intervals along the material flow direction and respectively located directly above each conveying shaft on the conveying mechanism, and a plurality of pressing rotors respectively arranged between two adjacent bars and connected to the pressing shafts; and the pressing rotors on two adjacent pressing shafts are staggered when rotating, and the pressing rotors on the pressing shafts are staggered with the conveying rotors on the corresponding conveying shafts directly below when rotating.

[0007] Preferably, the mixing mechanism includes a mixing barrel arranged directly below the filtering mechanism and used to support the filtrate to immerse the lower end of the conveying mechanism, a stirring assembly arranged in the mixing barrel and used to mix the filtrate, and a transmission assembly arranged outside the mixing barrel and used to drive the stirring assembly to rotate.

[0008] Preferably, the separation mechanism includes a conical column whose lower end is rotatably arranged on the frame and whose upper end is connected to the transmission assembly, a plurality of guide strips with a spiral structure arranged on the conical surface of the conical column, a sand discharge port formed on the lower end surface of the frame, and a liquid outlet formed on the side of the frame.

[0009] Preferably, the transmission assembly includes a transmission rod with its lower end arranged at the top of the conical column, a first transmission gear arranged on the transmission rod, and a second transmission gear arranged on the stirring assembly and meshed with the first transmission gear.

[0010] Preferably, the stirring assembly includes a first stirring shaft rotatably disposed in the mixing barrel and located at the front end of the material flow direction, a plurality of first stirring blades spaced apart on the first stirring shaft and used to force the filtrate to flow downward, a second stirring shaft rotatably disposed in the mixing barrel and located at the rear end of the material flow direction, a plurality of second stirring blades spaced apart on the first stirring shaft and used to force the filtrate to flow upward, and a guide cover disposed outside the second stirring blade.

[0011] Preferably, the mixing mechanism further comprises a diversion funnel which is arranged above the separation mechanism and is used to guide and collect the filtrate overflowing from the mixing barrel after mixing to the top of the separation mechanism.

[0012] Preferably, the wetting mechanism includes a suction pipe arranged on the frame and used to extract the liquid in the separation mechanism, a nozzle assembly arranged at the end of the suction pipe and used to evenly spray the extracted liquid on the pressing mechanism, and a pre-filter arranged in the middle of the suction pipe and used to filter the extracted liquid.

[0013] Preferably, the nozzle assembly includes a water spray shaft rotatably arranged on the water suction pipe, a plurality of water spray pipes arranged on the outer wall of the water spray shaft at equal intervals along the circumference of the water suction pipe, and a water spray outlet penetrating through each of the water spray pipes and the water spray shaft and connected to the water suction pipe, and the water spray outlet forces the water spray shaft to rotate when spraying water.

[0014] Preferably, the conveying mechanism includes a plurality of conveying shafts rotatably arranged on the frame at equal intervals along the material flow direction, and a plurality of conveying rotors respectively arranged between two adjacent gratings on the filtering mechanism and connected to the conveying shafts, and the conveying rotors on two adjacent conveying shafts are staggered when rotating.

[0015] Preferably, the pressing mechanism further comprises an extrusion plate rotatably disposed on the frame and used for mounting the bars and the pressing shaft, and a driving member disposed on the frame and driving the bars and the pressing shaft to move up and down along with the extrusion plate.

[0016] Beneficial effects of the present invention: (1) In the present invention, by setting a plurality of filtering mechanisms in conjunction with the conveying mechanism, the wastewater can be graded and filtered, with good filtering effect and high efficiency. The filtered filtrate is temporarily stored in the mixing mechanism to moisten the conveying mechanism, thereby avoiding dry grinding during the conveying process. The temporarily stored filtrate is mixed by the mixing mechanism and then overflows into the separation mechanism for sand-water separation, thereby avoiding local accumulation of fine sand on the separation mechanism and improving the separation effect. At the same time, the filtered sludge is efficiently squeezed and filtered by the upper and lower corresponding pressing rotors and the conveying rotors in an alternating manner, thereby achieving good squeezing effect and high efficiency, thereby improving production efficiency. In the squeezing process, the wetting mechanism is used to moisten the squeezing, thereby avoiding dry grinding during the squeezing process, thereby realizing the integrated sand screen function. (2) In the present invention, a mixing barrel is provided to cooperate with a transmission component to drive the stirring component to rotate while the separation mechanism separates the sand and water, so that the first stirring blade and the second stirring blade of the stirring component rotate to force the filtrate in the mixing barrel to stir and flow in a certain direction, thereby achieving mixing while avoiding large fluctuations on the surface of the filtrate, thereby improving the effect of the wet conveying mechanism. At the same time, a guide cover is used to avoid water leakage at the second stirring blade, increase the flow rate of the water flow to drive the fine sand at the bottom of the mixing barrel to move upward, improve the mixing effect, and at the same time, after the filtrate is evenly stirred, it overflows to the guide funnel and is accurately guided to the upper end of the separation mechanism, thereby improving the separation effect; (3) In the present invention, by arranging a conical column in combination with a guide strip, the light water in the filtrate is thrown out horizontally according to the different specific gravities of sand and water, and the heavier sand is discharged downward through the sand discharge port, so that the fine sand and water are automatically separated, thereby solving the technical problems in the prior art that the mixed solution of fine sand and water is discharged into a sand settling tank for sedimentation, and then the precipitated sand and water mixed solution is transmitted to a screw press for squeezing, so as to achieve the separation of fine sand and water, and the equipment occupies a large area, etc.; (4) In the present invention, when a relatively pure water separated from the separation component is returned to the water spraying and wetting pressing mechanism through the water pumping pipe, the water spraying pipe is forced to rotate with the water spraying shaft, thereby improving the uniformity of the water spraying of the water spraying port, improving the wetting effect, saving water resources, and improving economic benefits. At the same time, the water entering the nozzle assembly is filtered by the pre-filter to avoid clogging of the nozzle assembly. In summary, the equipment has the advantages of fast filtration efficiency, good filtration effect, and is not prone to dry grinding, and is particularly suitable for the field of wastewater treatment technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 A stereoscopic diagram of a shield-type sand screen integrated machine provided by the present invention.

[0019] Figure 2 A top view of a shield-type sand screen integrated machine provided by the present invention.

[0020] Figure 3 The present invention provides Figure 2 Cross-sectional view along the middle line A.

[0021] Figure 4 The present invention provides Figure 3 A partial enlarged view of point C in the middle.

[0022] Figure 5 The present invention provides Figure 2 Cross-sectional view along the middle edge at B.

[0023] Figure 6 This is a schematic structural diagram of the mixing mechanism provided by the present invention.

[0024] Figure 7 The present invention provides Figure 6 Schematic diagram of the structure of the mixing mechanism in different directions.

[0025] Figure 8 This is a schematic structural diagram of the separation mechanism provided by the present invention.

[0026] Fig. 9 This is a schematic structural diagram of the wetting mechanism provided by the present invention.

[0027] Fig.10 The present invention provides Fig. 9 A partial enlarged view of point D in the middle.

[0028] Fig.11 A cross-sectional view of a spray head assembly provided by the present invention. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0030] Embodiment 1 like Figure 1-Figure 2 as well as Figure 4-Figure 5 As shown, a shield-type sand screen integrated machine includes: A frame 1 with a liquid inlet 11 and a mud outlet 12 at both ends, a plurality of filtering mechanisms 2 arranged in a stepped manner in the frame 1 and filtering large-particle sludge in a graded manner along the material flow direction, a separation mechanism 3 arranged below each filtering mechanism 2 and used for separating sand and water from the filtered filtrate, a mixing mechanism 4 arranged between the filtering mechanism 2 and the separation mechanism 3 and used for mixing the filtrate, a conveying mechanism 5 arranged on the filtering mechanism 2 and extending its lower end into the mixing mechanism 4 and used for conveying the slurry on the filtering mechanism 2, a pressing mechanism 6 arranged above the last filtering mechanism 2 and cooperating with the conveying mechanism 5 to alternately press the slurry on the filtering mechanism 2, and a wetting mechanism 7 arranged above the pressing mechanism 6 and used for wetting the pressing mechanism 6; The pressing mechanism 6 includes a plurality of bars 61 arranged on the frame 1 at equal intervals along a direction perpendicular to the material flow, a plurality of pressing shafts 62 rotatably arranged on the frame 1 at equal intervals along the material flow direction and respectively located directly above each conveying shaft 51 on the conveying mechanism 5, and a plurality of pressing rotors 63 respectively arranged between two adjacent bars 61 and connected to the pressing shafts 62; and the pressing rotors 63 on two adjacent pressing shafts 62 are staggered when rotating, and the pressing rotors 63 on the pressing shafts 62 are staggered when rotating with the conveying rotors 52 on the corresponding conveying shaft 51 directly below.

[0031] In this embodiment, a plurality of filtering mechanisms 2 are provided to cooperate with the conveying mechanism 5 to improve the conveying efficiency of wastewater, so that the wastewater can be graded and filtered, and the filtered filtrate is temporarily stored in the mixing mechanism 4 to moisten the conveying mechanism 5 to avoid dry grinding during the conveying process, and the temporarily stored filtrate is mixed by the mixing mechanism 4 and then overflows into the separation mechanism 3 for sand and water separation, and the filtered sludge is efficiently squeezed and filtered by the alternating rotation of the upper and lower corresponding pressing rotors 63 and the conveying rotor 52, and the wetting mechanism 7 is used to moisten the pressing during the pressing process to avoid dry grinding during the pressing process, thereby realizing the integrated sand screen function.

[0032] In detail, first, wastewater is introduced into the frame 1 through the liquid inlet 11, and the wastewater is sequentially transported to multiple filtering mechanisms 2 through the conveying mechanism 5 for graded filtration, filtering out filtrate and sludge, with good filtering effect and high efficiency; then the separated filtrate enters the mixing mechanism 4 for mixing and then overflows to the separation mechanism 3 to separate water and fine sand, avoiding the accumulation of fine sand, with good separation effect, and realizing the separate collection of water and fine sand, and the mixing mechanism 4 filled with filtrate is able to immerse the lower end of the conveying mechanism 5 for wetting, avoiding the dry grinding of the conveying rotor 52 on the conveying mechanism 5, thereby improving the service life; finally, the separated sludge enters between the pressing mechanism 6 and the filtering mechanism 2, and the remaining filtrate in the sludge is squeezed out by the alternating cooperation of the pressing rotor 63 moistened by the wetting mechanism 7 and the conveying rotor 52, and the sludge is discharged and collected through the sludge discharge port 12, with good pressing effect and high efficiency, improving production efficiency, and avoiding the dry grinding of the pressing rotor 63 on the pressing mechanism 6, further improving the service life.

[0033] It should be noted that the filtering mechanism 2 is a structure of multiple grid plates 21, and the multiple grid plates 21 are arranged on the frame 1 at equal intervals along a direction perpendicular to the material flow direction, and the frame 1 is provided with a fender 22 for guiding the wastewater entering the liquid inlet 11 to the front ends of the multiple grid plates 21; The distance between two adjacent grating plates 21 and two adjacent grating bars 61 is 0.3-0.8 mm, and the thickness of the conveying rotor 52 and the pressing rotor 63 is 0.1-0.7 mm. Preferably, the distance between two adjacent grating plates 21 and two adjacent grating bars 61 is 0.5 mm, and the thickness of the conveying rotor 52 and the pressing rotor 63 is 0.3 mm, which not only ensures that the strength of the rotor 24 is moderate, but also improves the density of multiple grating plates 21 and multiple grating bars 61, thereby screening and separating fine sand smaller than 0.5 mm.

[0034] Further, if Figure 5-Figure 8 As shown, the mixing mechanism 4 includes a mixing barrel 41 arranged directly below the filtering mechanism 2 and used to support the lower end of the filtrate immersion conveying mechanism 5, a stirring component 42 arranged in the mixing barrel 41 and used to mix the filtrate, and a transmission component 43 arranged outside the mixing barrel 41 and used to drive the stirring component 42 to rotate.

[0035] In this embodiment, by setting a mixing barrel 41 and a transmission assembly 43, the stirring assembly 42 rotates to stir the supported filtrate evenly, and the filtrate overflows to the lower end of the conveying mechanism 5 for wetting and overflows to the separation mechanism 3 for sand and water separation.

[0036] Further, if Figure 5 as well as Figure 8As shown, the separation mechanism 3 includes a conical column 31 whose lower end is rotatably arranged on the frame 1 and whose upper end is connected to the transmission assembly 43, a plurality of guide strips 32 which are arranged on the conical surface of the conical column 31 and are of a spiral structure, a sand discharge port 33 formed on the lower end surface of the frame 1, and a liquid outlet 34 formed on the side of the frame 1.

[0037] In this embodiment, by setting a conical column 31 and a guide strip 32, the light water in the filtrate is thrown out horizontally according to the different specific gravities of sand and water, and the heavier sand is discharged downward through the sand discharge port 33, so that the fine sand and water are automatically separated. This solves the technical problems in the prior art that the mixed solution of fine sand and water is discharged into a sand settling tank for sedimentation, and then the precipitated sand and water mixed solution is transmitted to a screw press for squeezing to achieve the separation of fine sand and water, such as large equipment investment and large equipment footprint.

[0038] It should be noted that the size of the liquid outlet 34 is adapted to the height of the conical column 31, so as to facilitate the collection of separated water; in addition, the sand outlet 33 has an opening structure that is larger at the top and smaller at the bottom, so as to facilitate the smooth discharge of fine sand slurry.

[0039] Further, if Figure 5-Figure 8 As shown, the transmission assembly 43 includes a transmission rod 431 whose lower end is arranged at the top of the conical column 31, a first transmission gear 432 arranged on the transmission rod 431, and a second transmission gear 433 arranged on the stirring assembly 42 and meshed with the first transmission gear 432.

[0040] In this embodiment, by providing a transmission rod 431 to cooperate with the first transmission gear 432 and the second transmission gear 433, the separation mechanism 3 separates the filtrate while driving the stirring assembly 42 to stir and mix the filtrate in the mixing barrel 41.

[0041] It should be noted that the diameter of the second transmission gear 433 is much larger than that of the first transmission gear 432, thereby reducing the rotation speed of the stirring assembly 42, thereby avoiding large fluctuations on the surface of the filtrate in the mixing barrel 41 and affecting the immersion effect of the conveying mechanism 5, and the wetting effect is better.

[0042] Further, if Figure 5-Figure 6 As shown, the stirring assembly 42 includes a first stirring shaft 421 rotatably disposed in the mixing barrel 41 and located at the front end of the material flow direction, a first stirring blade 422 arranged at multiple intervals on the first stirring shaft 421 and used to force the filtrate to flow downward, a second stirring shaft 423 rotatably disposed in the mixing barrel 41 and located at the rear end of the material flow direction, a second stirring blade 424 arranged at multiple intervals on the first stirring shaft 421 and used to force the filtrate to flow upward, and a guide cover 425 arranged outside the second stirring blade 424.

[0043] In this embodiment, the first stirring blade 422 and the second stirring blade 424 are arranged to rotate with the first stirring shaft 421 and the second stirring shaft 423 respectively, so that the filtrate in the mixing barrel 41 flows in a certain direction, and mixing is achieved while avoiding large fluctuations on the surface of the filtrate, thereby improving the effect of the wet conveying mechanism 5. At the same time, the guide cover 425 is used to avoid water leakage at the second stirring blade 424, and the flow rate of the water flow is increased to drive the fine sand at the bottom of the mixing barrel 41 to move upward.

[0044] In detail, when in use, the first stirring blade 422 filters out the filtrate with a high sand content at the front end of the material flow direction and quickly guides it to the bottom of the mixing barrel 41 to prevent excessive fine sand from flowing out with the filtrate overflowing from the mixing barrel 41. Then the second stirring blade 424 cooperates with the guide cover 425 to guide the fine sand at the bottom of the mixing barrel 41 upward with the water flow, so that the filtrate with a low sand content filtered out from the rear end of the material flow direction is mixed, thereby improving the mixing effect and avoiding the fine sand from sinking to the bottom. Finally, the first stirring blade 422 and the second stirring blade 424 cooperate with each other to make the filtrate in the mixing barrel 41 flow in a certain direction, achieving stirring and mixing while avoiding large fluctuations on the filtrate surface.

[0045] It should be noted that the diameter of the deflector 425 gradually increases from top to bottom, thereby increasing the extraction area and extraction effect of the sediment at the bottom of the mixing barrel 41, and at the same time improving the effect of the sediment being sprayed upward through the deflector 425 along with the water flow.

[0046] Further, if Figure 5-Figure 6 As shown, the mixing mechanism 4 also includes a guide funnel 44 which is arranged above the separation mechanism 3 and is used to guide and collect the filtrate overflowed from the mixing barrel 41 after mixing to the top of the separation mechanism 3.

[0047] In this embodiment, the diversion funnel 44 is provided to divert the filtrate to the upper end of the separation mechanism 3 accurately, thereby improving the separation effect.

[0048] In detail, the top of the conical column 31 is arranged correspondingly to the corresponding guide funnel 44, so that the filtrate overflowing from the mixing barrel 41 flows to the top of the conical column 31, and then the filtrate flows from top to bottom through multiple guide strips 32 to accelerate the sand-water separation.

[0049] It should be noted that there are multiple separation mechanisms 3, and correspondingly, there are multiple stirring components 42 and diversion funnels 44, and the multiple diversion funnels 44 under the same mixing barrel 41 are integrally formed to prevent the filtrate from leaking, which improves the separation effect while improving the mixing effect.

[0050] Further, if Figure 1 as well as Figure 9-11As shown, the wetting mechanism 7 includes a water suction pipe 71 arranged on the frame 1 and used to extract the liquid in the separation mechanism 3, a nozzle assembly 72 arranged at the end of the water suction pipe 71 and used to evenly spray the extracted liquid on the pressing mechanism 6, and a pre-filter 73 arranged in the middle of the water suction pipe 71 and used to filter the extracted liquid.

[0051] In this embodiment, a water suction pipe 71 is provided to cooperate with the nozzle assembly 72 to return the relatively pure water separated in the separation assembly to the pressing assembly for wetting, thereby saving water resources and improving economic benefits. At the same time, the water entering the nozzle assembly 72 is filtered by the pre-filter 73 to avoid clogging of the nozzle assembly 72.

[0052] It should be noted that the water suction pipe 71 forms a high-pressure water flow by cooperating with the water suction pump, and both the water suction pipe 71 and the installation method thereof are prior art, and the pre-filter 73 for filtering fine sand and the installation method thereof are also prior art, which will not be described in detail here.

[0053] Further, if Figure 10-11 As shown, the nozzle assembly 72 includes a water spray shaft 721 rotatably arranged on the water suction pipe 71, a plurality of water spray pipes 722 arranged on the outer wall of the water spray shaft 721 at equal intervals along the circumference of the water suction pipe 71, and a water spray port 723 which penetrates each water spray pipe 722 and the water spray shaft 721 and is connected to the water suction pipe 71, and the water spray port 723 forces the water spray shaft 721 to rotate when spraying water.

[0054] In this embodiment, by providing the water spraying outlet 723 to spray water and wet the pressing mechanism 6, the water spraying pipe 722 is forced to rotate along with the water spraying shaft 721, thereby improving the uniformity of the spraying of the water spraying outlet 723 and improving the wetting effect.

[0055] It should be noted that the water outlet end of the water spray port 723 is a conical structure with a gradually decreasing diameter, so that the squeezed high-pressure water flow is dispersed when sprayed out, further improving the uniformity of the spraying.

[0056] Further, if Figure 3-Figure 5 As shown, the conveying mechanism 5 includes a plurality of conveying shafts 51 rotatably arranged on the frame 1 at equal intervals along the material flow direction, and a plurality of conveying rotors 52 respectively arranged between two adjacent grid plates 21 on the filtering mechanism 2 and connected to the conveying shafts 51, and the conveying rotors 52 on two adjacent conveying shafts 51 are staggered when rotating.

[0057] In this embodiment, by arranging staggered conveying rotors 52, full coverage cleaning of the grating plates 21 is achieved to prevent blockage between the grating plates 21. At the same time, the staggered conveying rotors 52 gradually push the material forward, improve the material flow efficiency, and thus achieve efficient filtration.

[0058] It should be noted that a support 53 is provided between two adjacent conveying rotors 52 and two adjacent pressing rotors 63 to position the distance, thereby improving the stability of the conveying rotor 52 and the pressing rotor 63 with a smaller thickness during rotation, while ensuring a constant spacing and stable operation, thereby avoiding the technical problem that the smaller thickness leads to insufficient rigidity and inability to perform normal cleaning work; The present application does not limit the specific driving method of the multiple conveying shafts 51 and the multiple pressing shafts 62. It can be a driving motor to drive the chain sprocket for synchronous transmission, or it can use gear transmission, belt transmission, etc.; at the same time, the specific structure of the conveying rotor 52 and the pressing rotor 63 is not limited, and it can be a triangular structure, an elliptical structure, etc. The present application prefers an elliptical structure to increase the external extrusion area when the conveying rotor 52 and the pressing rotor 63 cooperate with each other, thereby improving the effect of extruding the slurry.

[0059] Further, if Figure 2-Figure 5 As shown, the pressing mechanism 6 also includes an extrusion plate 64 rotatably disposed on the frame 1 and used to install the grid bars 61 and the pressing shaft 62 , and a driving member 65 disposed on the frame 1 and driving the grid bars 61 and the pressing shaft 62 to move up and down with the extrusion plate 64 .

[0060] In this embodiment, a driving member 65 is provided to drive the extrusion plate 64 to reciprocate up and down. The upward moving bars 61 and the pressing rotor 63 enlarge the sludge outlet, reduce interference with the conveying mechanism 5 when conveying sludge, improve the conveying efficiency, and increase the filtration efficiency. The downward moving bars 61 and the pressing rotor 63 increase or decrease the sludge outlet, increase the extrusion force of the squeezed sludge, improve the extrusion effect on the sludge, and improve the filtration effect, thereby further improving the production efficiency.

[0061] It should be noted that the driving member 65 can be a gas cylinder or an oil cylinder, etc., and the driving member 65 and its installation method are both existing technologies and will not be described in detail here.

[0062] Working process: First, wastewater is introduced into the frame 1 through the liquid inlet 11, and the wastewater is sequentially transported to multiple filter mechanisms 2 through the transport mechanism 5 for graded filtration to filter out filtrate and sludge; Next, the separated filtrate enters the mixing mechanism 4 for mixing and then overflows into the separation mechanism 3 to separate water and fine sand, and the mixing mechanism 4 filled with filtrate is able to immerse the lower end of the conveying mechanism 5 for wetting; Then, the separated sludge enters between the pressing mechanism 6 and the filtering mechanism 2, and the remaining filtrate in the sludge is squeezed out by the alternating cooperation of the pressing rotor 63 moistened by the moistening mechanism 7 and the conveying rotor 52; Finally, the separated water, fine sand and sludge are collected separately.

[0063] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front and back", "left and right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0064] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0065] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A shield-type sand screen integrated machine, characterized in that: include: A frame (1) having a liquid inlet (11) and a mud outlet (12) at both ends; a plurality of filter mechanisms (2) arranged in a stepped manner in the frame (1) and filtering large-particle sludge in a graded manner along a material flow direction; a separation mechanism (3) arranged below each of the filter mechanisms (2) and used to separate sand and water from the filtered filtrate; a mixing mechanism (4) arranged between the filter mechanism (2) and the separation mechanism (3) and used to mix the filtrate; a conveying mechanism (5) arranged on the filter mechanism (2) and having its lower end extending into the mixing mechanism (4) and used to convey the slurry on the filter mechanism (2); a pressing mechanism (6) arranged above the last filter mechanism (2) and cooperating with the conveying mechanism (5) to alternately press the slurry on the filter mechanism (2); and a wetting mechanism (7) arranged above the pressing mechanism (6) and used to wet the pressing mechanism (6); The pressing mechanism (6) comprises a plurality of bars (61) arranged on the frame (1) at equal intervals along a direction perpendicular to the material flow, a plurality of pressing shafts (62) rotatably arranged on the frame (1) at equal intervals along the material flow direction and respectively located directly above each conveying shaft (51) on the conveying mechanism (5), and a plurality of pressing rotors (63) respectively arranged between two adjacent bars (61) and connected to the pressing shafts (62); and the pressing rotors (63) on two adjacent pressing shafts (62) are arranged in a staggered manner when rotating, and the pressing rotors (63) on the pressing shaft (62) are arranged in a staggered manner when rotating with the conveying rotors (52) on the corresponding conveying shaft (51) directly below.

2. The shield-type sand screen integrated machine according to claim 1, characterized in that: The mixing mechanism (4) comprises a mixing barrel (41) arranged directly below the filtering mechanism (2) and used to support the filtrate to immerse the lower end of the conveying mechanism (5), a stirring assembly (42) arranged in the mixing barrel (41) and used to mix the filtrate, and a transmission assembly (43) arranged outside the mixing barrel (41) and used to drive the stirring assembly (42) to rotate.

3. The shield-type sand screen integrated machine according to claim 2, characterized in that: The separation mechanism (3) comprises a conical column (31) whose lower end is rotatably mounted on the frame (1) and whose upper end is connected to the transmission assembly (43), a plurality of guide strips (32) arranged on the conical surface of the conical column (31) and having a spiral structure, a sand discharge port (33) formed on the lower end surface of the frame (1), and a liquid outlet (34) formed on the side of the frame (1).

4. The shield-type sand screen integrated machine according to claim 3, characterized in that: The transmission assembly (43) comprises a transmission rod (431) whose lower end is arranged at the top of the conical column (31), a first transmission gear (432) arranged on the transmission rod (431), and a second transmission gear (433) arranged on the stirring assembly (42) and meshing with the first transmission gear (432).

5. The shield-type sand screen integrated machine according to claim 2, characterized in that: The stirring assembly (42) comprises a first stirring shaft (421) rotatably disposed in the mixing barrel (41) and located at the front end in the material flow direction, a plurality of first stirring blades (422) disposed at intervals on the first stirring shaft (421) and used to force the filtrate to flow downward, a second stirring shaft (423) rotatably disposed in the mixing barrel (41) and located at the rear end in the material flow direction, a plurality of second stirring blades (424) disposed at intervals on the first stirring shaft (421) and used to force the filtrate to flow upward, and a flow guide cover (425) disposed outside the second stirring blade (424).

6. The shield-type sand screen integrated machine according to claim 2, characterized in that: The mixing mechanism (4) further comprises a guide funnel (44) which is arranged above the separation mechanism (3) and is used to guide and collect the filtrate overflowing from the mixing barrel (41) after mixing to the top of the separation mechanism (3).

7. The shield-type sand screen integrated machine according to claim 1, characterized in that: The wetting mechanism (7) comprises a water extraction pipe (71) arranged on the frame (1) and used to extract liquid from the separation mechanism (3), a spray head assembly (72) arranged at the end of the water extraction pipe (71) and used to evenly spray the extracted liquid onto the pressing mechanism (6), and a pre-filter (73) arranged in the middle of the water extraction pipe (71) and used to filter the extracted liquid.

8. The shield-type sand screen integrated machine according to claim 7, characterized in that: The spray head assembly (72) comprises a water spray shaft (721) rotatably arranged on the water pumping pipe (71), a plurality of water spray pipes (722) arranged at equal intervals on the outer wall of the water spray shaft (721) along the circumference of the water pumping pipe (71), and a water spray port (723) penetrating each of the water spray pipes (722) and the water spray shaft (721) and connected to the water pumping pipe (71), wherein the water spray port (723) forces the water spray shaft (721) to rotate when spraying water.

9. The shield-type sand screen integrated machine according to claim 1, characterized in that: The conveying mechanism (5) comprises a plurality of conveying shafts (51) rotatably arranged on the frame (1) at equal intervals along the material flow direction, and a plurality of conveying rotors (52) respectively arranged between two adjacent grid plates (21) on the filtering mechanism (2) and connected to the conveying shafts (51), wherein the conveying rotors (52) on two adjacent conveying shafts (51) are arranged in a staggered manner when rotating.

10. The shield-type sand screen integrated machine according to claim 1, characterized in that: The pressing mechanism (6) further comprises a pressing plate (64) rotatably arranged on the frame (1) and used for mounting the grid bars (61) and the pressing shaft (62), and a driving member (65) arranged on the frame (1) and driving the grid bars (61) and the pressing shaft (62) to move up and down along with the pressing plate (64).

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