Gravity vacuum draining device for 400-mesh fine sand

Abstract

The utility model discloses a gravity vacuum draining device for 400-mesh fine sand, which comprises a water-permeable sheath, a filter screen and a vacuum tube, the filter screen wraps the surface of the vacuum tube to form a water-permeable vacuum tube, the water-permeable vacuum tube extends into the water-permeable sheath to form the gravity vacuum draining device, a flange is arranged at the bottom of the water-permeable sheath, and the water-permeable vacuum tube penetrates into the water-permeable sheath to form the gravity vacuum draining device. Rectangular square holes are formed in the periphery; the filter screen is of a double-layer filter screen structure, the bottom of the vacuum tube is transparent and is provided with a bottom flange, a middle flange is arranged above the bottom flange, a leather cushion is arranged between the water-permeable vacuum tube and the water-permeable sheath, and the flanges, the leather cushion and the middle flange are in sealed connection. During use, the water-permeable sheath is placed on the inverted-cone-shaped bottom cylinder wall of the silo and vertically extends into the silo upwards, and the connection position of the water-permeable sheath and the silo is subjected to sealing treatment; the permeable vacuum pipe is in sealed connection with a negative pressure water pumping facility through a bottom flange and is used for solving the problem of draining of fine sand with 200 meshes or smaller than 200 meshes.

Description

TECHNICAL FIELD

[0001] The utility model relates to fine sand draining technology field, concretely to a gravity vacuum draining device for 400 mesh fine sand. BACKGROUND

[0002] With the continuous improvement of people's attention to environmental protection, the dust raising, throwing and leaking phenomenon caused by the traditional processing of sand and gravel aggregate in open pit, the combined dumping and trucking, and the truck transportation of fine sand and other modes of operation has gradually been unacceptable, and the production process must be upgraded to solve the above problems to meet the basic requirements of the new environmental protection law and the pursuit of the public to a better life environment.

[0003] After searching, the patent with the patent publication number CN 220633307 U discloses a silt draining device, which comprises a base, a first vertical plate and a second vertical plate, the first vertical plate is vertically welded and fixed at the front end and the rear end of the base on both sides, a rotating drum is rotatably installed between the first vertical plates of the front end and the rear end, a filter screen is transmissionally arranged between the rotating drums on the top of the base, the second vertical plates are vertically welded and fixed on both sides of the middle part of the base, a rotating rod is rotatably installed between the second vertical plates of the front end and the rear end, side plates are annularly welded on the outer circles of both sides of the rotating rod, and a stirring rod is fixed on the outer circles between the front end and the rear end side plates by welding. The inclined filter screen is driven to rotate by the rotating drums on both sides, so that the silt on the surface of the filter screen is conveyed and drained, and the accumulated silt can be stirred and turned over by the stirring rod in the process, so that the silt is not accumulated and the water is fully drained. However, in the technical solution, the silt is simply placed on the inclined filter screen, the filter screen is driven to drain by the rotating drums at both ends, the draining time is less than 1 minute, and the water content cannot be reduced to below 15% by relying on the natural gravity flow alone, which cannot meet the environmental protection requirements of 5km or more long-distance truck transportation. In addition, when processing fine sand of 200 mesh or finer, the fine sand can pass through the filter screen and cannot reach the target position, so the draining function cannot be realized. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a gravity vacuum draining device for 400 mesh fine sand to solve the problems in the background art.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a gravity vacuum water draining device for 400 mesh fine sand, which comprises a water-permeable sheath, a filter screen and a vacuum pipe, the filter screen is wrapped on the surface of the vacuum pipe to form a water-permeable vacuum pipe, the water-permeable vacuum pipe is deeply inserted into the water-permeable sheath to form the gravity vacuum water draining device, the water-permeable sheath is placed on the cylindrical wall of the inverted conical bottom of the silo, is deeply inserted into the interior of the silo vertically upwards, and the water-permeable sheath is sealed at the connecting position with the silo; a bottom flange is arranged at the bottom of the vacuum pipe, and the water-permeable vacuum pipe is sealingly connected with the negative pressure water pumping facility through the bottom flange.

[0006] Preferably, the water-permeable sheath is a circular pipe with an inner diameter of 80 mm, a wall thickness of 5-10 mm, a length of 60-100 cm, a top cap seal, a bottom permeable and a flange.

[0007] Preferably, the water-permeable sheath is provided with 2mm*60mm rectangular holes with a spacing of 3-5mm around the water-permeable sheath, and the opening rate is greater than or equal to 80%.

[0008] Preferably, the filter screen is a double-layer filter screen structure, the outer layer is 400 mesh, the opening rate is greater than or equal to 75%, and the inner layer is 500 mesh, the opening rate is greater than or equal to 85%.

[0009] Preferably, the vacuum pipe is a circular pipe with an inner diameter of 60 mm, a wall thickness of 3-5 mm, a bottom permeable and a bottom flange, an intermediate flange is arranged 10-15 cm above the bottom flange, 2mm*30mm rectangular holes are arranged on the intermediate flange to the top with a spacing of 2-3mm, the opening rate is greater than or equal to 80%, and the top is permeable.

[0010] Preferably, the water-permeable vacuum pipe and the water-permeable sheath are sealingly connected by the flange, the leather pad and the intermediate flange.

[0011] Compared with the prior art, the utility model has the beneficial effects as follows:

[0012] 1. The gravity vacuum water draining device for 400 mesh fine sand adopts 400 mesh + 500 mesh double-layer filter screen to completely prevent the fine sand from penetrating the water draining device and avoid the loss of sand.

[0013] 2. The gravity vacuum water draining device for 400 mesh fine sand is deeply inserted into the interior of the stored sand in a tubular structure, and the accumulated water in the stored sand is drained from the interior under the action of gravity, so that the water content in the stored sand is effectively reduced.

[0014] 3. The gravity vacuum water draining device for 400 mesh fine sand can form a double water draining effect of gravity + negative pressure under the condition that the negative pressure water pumping facility is connected externally, and the water content in the stored 400 mesh fine sand can be reduced to less than 15% within 2 hours, which completely meets the water content index requirement of steam transportation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the overall structure schematic diagram of the utility model;

[0016] Figure 2 is the water permeable sheath structure schematic diagram of the utility model;

[0017] Figure 3 is the water permeable vacuum pipe structure schematic diagram of the utility model;

[0018] Figure 4 is the state schematic diagram of the overall structure of the utility model applied to vertical silo.

[0019] In the drawing: 1, water permeable sheath;11, 2mm×60mm rectangular square hole;12, flange;2, filter screen;3, vacuum pipe;31, 2mm×30mm rectangular square hole;32, middle flange;33, bottom flange;4, skin cushion;5, water permeable vacuum pipe;6, silo;7, negative pressure water pumping facility. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] Please refer to Figures 1-3 , a gravity vacuum water draining device for 400 mesh fine sand in the embodiment, including water permeable sheath 1, filter screen 2 and vacuum pipe 3, filter screen 2 is wrapped on the surface of vacuum pipe 3 and combined into water permeable vacuum pipe 5, water permeable vacuum pipe 5 is deeply into water permeable sheath 1 and combined into gravity vacuum water draining device, wherein, water permeable sheath 1 is a circular pipe with 80mm inner diameter and 5~10mm wall thickness, length is 60cm~100cm, top cap is sealed, bottom is permeable and is provided with flange 12;Water permeable sheath 1 is provided with 2mm×60mm rectangular square hole 11 with 3~5mm spacing around, and the opening rate is greater than or equal to 80%;Filter screen 2 is double-layer filter screen structure, outer layer is 400 mesh, and the opening rate is greater than or equal to 75%, inner layer is 500 mesh, and the opening rate is greater than or equal to 85%;Vacuum pipe 3 is a circular pipe with 60mm inner diameter and 3~5mm wall thickness, bottom is permeable and is provided with bottom flange 33, middle flange 32 is arranged at 10~15cm position from bottom flange 33 upwards, 2mm×30mm rectangular square hole 31 is arranged at middle flange 32 to top end with 2~3mm spacing, and the opening rate is greater than or equal to 80%, top is permeable;Water permeable vacuum pipe 5 and water permeable sheath 1 are sealed and connected by flange 12, skin cushion 4 and middle flange 32.

[0022] Specific use, as shown in Figure 4 The water-permeable protective sleeve 1 is placed on the cylindrical wall of the conical bottom of the silo 6, vertically upward into the interior of the silo 6, the connection position is sealed, the bottom flange 33 of the water-permeable vacuum pipe 5 is sealed and connected with the negative pressure water pumping device 7, and the gravity vacuum drainage device as shown in Figure 4 is applied to the vertical silo 6. In the actual production process, the 400-mesh fine sand material with a moisture content of more than 15% enters the silo 6 from the top of the silo 6 and forms a high material layer. Under the action of gravity, the capillary water adsorbed on the surface of the 400-mesh fine sand material gradually flows downward until the moisture content of the upper layer of material decreases to less than 9%, the capillary water adsorbed on the surface of the 400-mesh fine sand material reaches a removal rate of 95%, and the dry sand without water marks and the wet sand with visible water marks are layered. The upper layer is a dry material layer, and the lower layer is a wet material layer. With the passage of time, the dividing line gradually moves downward, the thickness of the dry material layer gradually increases, and the thickness of the wet material layer gradually decreases. In this process, the capillary water flows downward to the bottom of the silo 6 and is enriched, causing the moisture content of the material at the bottom of the silo 6 to rapidly rise to more than 20%, and natural seepage water appears. The natural seepage water passes through the 2mm×60mm rectangular hole 11 to the surface of the filter screen 2. Under the condition of the enrichment of the continuously downward flowing capillary water, a certain osmotic pressure is formed, which drives the capillary water to pass through the double-layer filter screen 2 composed of a 400-mesh filter screen and a 500-mesh filter screen, and further pass through the 2mm×30mm rectangular hole 31 into the vacuum pipe 3. The capillary water in the vacuum pipe 3 flows out under the action of gravity, and the dehydration of the 400-mesh fine sand is completed.

[0023] In the above use process, when the negative pressure water pumping device 7 is matched, a negative pressure vacuum area of-40kPa is formed in the vacuum pipe 3, and a gravity osmotic pressure area is formed on the surface of the water-permeable protective sleeve 1, forming a composite force field composed of gravity osmotic pressure and mechanical negative pressure, which drives the capillary water to flow out quickly, and completes the dehydration of the 400-mesh fine sand within 2 hours, so that the moisture content of the fine sand, ultra-fine sand and tailings stored at the bottom of the silo 6 is reduced to below 15%, and the sand pile equipped on the automobile no longer seeps water, which can meet the environmental protection requirements of automobile transportation.

[0024] It should be noted that in this article, relational terms such as first and second are used only to distinguish one entity or action from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or actions. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0025] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gravity vacuum draining device for 400 mesh fine sand, comprising a water-permeable sheath (1), a filter screen (2) and a vacuum pipe (3), characterized in that: The filter screen (2) is wrapped on the surface of the vacuum tube (3) to form a water-permeable vacuum tube (5), which is deeply arranged in the water-permeable sheath (1) to form a gravity vacuum draining device, the water-permeable sheath (1) is placed on the bottom wall of the silo (6) and is vertically arranged in the silo (6), and the water-permeable sheath (1) is sealed with the silo (6) at the connecting position; a bottom flange (33) is arranged at the bottom of the vacuum tube (3), and the water-permeable vacuum tube (5) is sealed and connected with the negative pressure water pumping device (7) through the bottom flange (33).

2. A gravity vacuum drainage device for 400 mesh fine sand as claimed in claim 1, wherein: The water-permeable sheath (1) is a circular tube with an inner diameter of 80 mm, a wall thickness of 5-10 mm, a length of 60-100 cm, a top cap seal, a bottom permeable structure and a flange (12).

3. A gravity vacuum drainage device for 400 mesh fine sand as claimed in claim 2, wherein: The water-permeable sheath (1) is surrounded by 2mm×60mm rectangular holes (11) with a spacing of 3-5mm, and the opening rate is greater than or equal to 80%.

4. A gravity vacuum drainage device for 400 mesh fine sand as claimed in claim 1, wherein: The filter screen (2) is a double-layer filter screen structure, the outer layer is 400 mesh, the opening rate is greater than or equal to 75%, and the inner layer is 500 mesh, the opening rate is greater than or equal to 85%.

5. A gravity vacuum drainage device for 400 mesh fine sand as claimed in claim 2, wherein: The vacuum tube (3) is a circular tube with an inner diameter of 60 mm, a wall thickness of 3-5 mm, a bottom permeable structure and a bottom flange (33), an intermediate flange (32) is arranged 10-15 cm above the bottom flange (33), 2mm×30mm rectangular holes (31) are arranged on the intermediate flange (32) with a spacing of 2-3mm from the top end, the opening rate is greater than or equal to 80%, and the top is permeable.

6. A gravity vacuum drainage device for 400 mesh fine sand as claimed in claim 5, wherein: The water-permeable vacuum tube (5) and the water-permeable sheath (1) are connected by the flange (12), the leather pad (4) and the intermediate flange (32).

Images