An adjustable sand sieve

Abstract

The present invention discloses an adjustable sand sieve, which is characterized in that: it includes a sand baffle and at least two layers of sand sieving layers. The sand sieving layers include a first sand sieving layer and a second sand sieving layer. The sand baffle, the first sand sieving layer and the second sand sieving layer are arranged in sequence from the outside to the inside of the window. The distance between the sand baffle and the first sand sieving layer is adjustable; the sand baffle includes a plurality of vertically arranged side-by-side sand baffle units, the first sand sieving layer includes a plurality of vertically arranged side-by-side groove-shaped sand sieving units, and the second sand sieving layer includes a plurality of vertically arranged side-by-side curved sand sieving units. The sand baffle and the first sand sieving layer are opposite to each other front and back to form a multi-collision circuitous air flow path. The present invention is of great significance to the ventilation design in sandy dust-prone areas, solves the problems that traditional anti-sand louvers are heavy and not easy to install and not convenient to clean. This sand sieve is easy to install, has a reasonable structure, adjustable opening degree, and has good applicability to different degrees of sand and dust in desert areas.

Description

Technical Field

[0001] The invention relates to an adjustable sand screener, in particular to a vertical periodic linear adjustable sand screener suitable for extreme sandstorm climates, and belongs to the technical field of shutters. Background Art

[0002] The shutter structure originated in China and was widely used in ancient Chinese architecture. The periodic linear sand screening layer is an extended style of the shutter structure.

[0003] The shutters of traditional sand-proof shutters are installed horizontally, with a simple sand-blocking structure and poor sand-proof performance. The blade spacing is small, which increases the natural wind resistance. The gap between the blades is prone to sand and dust accumulation and is inconvenient to clean. Large-area sand-proof shutters are mostly double-layer structures, which are bulky and inconvenient to install and maintain. Electric double-layer shutters have a complicated structure, and the filter part is inconvenient to disassemble and clean. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing sand-proof shutters cannot achieve both the effect of blocking sand and dust and the convenience of cleaning.

[0005] In order to solve the above problems, the technical solution of the present invention is to provide an adjustable sand screen, which is characterized by comprising a sand retaining plate and at least two sand screening layers, wherein the sand screening layers include a first sand screening layer and a second sand screening layer, wherein the sand retaining plate, the first sand screening layer and the second sand screening layer are arranged in sequence from the outside to the inside of the window, and the distance between the sand retaining plate and the first sand screening layer is adjustable;

[0006] The sand retaining plate comprises a plurality of sand retaining units arranged vertically and side by side, wherein an arc-shaped recessed portion is provided on one side of the sand retaining unit in contact with the wind and sand to retain and slide part of the wind and sand, and convex guide portions are provided on both sides of the arc-shaped recessed portion to guide the other part of the wind and sand to the first sand screening layer;

[0007] The first sand screening layer comprises a plurality of groove-shaped sand screening units arranged vertically side by side, the end of the convex guide portion of the sand retaining plate is butted against the notch of the groove-shaped sand screening unit, the wind-blown sand guided by the convex guide portion collides with the groove-shaped sand screening unit and slides down, and the groove-shaped sand screening unit is provided with a hook-shaped portion 1 for intercepting wind-blown sand;

[0008] The second sand screening layer comprises a plurality of curved sand screening units arranged vertically side by side, and two hook-shaped parts for intercepting wind-blown sand are arranged on both sides of the curved sand screening units, the direction of the hook-shaped parts is toward the direction of the first sand screening layer, and the hook-shaped parts and the curved sand screening units form a fork-shaped structure;

[0009] The sand retaining plate and the first sand screening layer are arranged front and back to form a circuitous airflow path with multiple collisions.

[0010] Preferably, the sand blocking unit is a windshield in the shape of an inverted omega, the arc-shaped recess is provided in the middle of the bottom of the inverted omega-shaped windshield, and both sides of the inverted omega-shaped windshield serve as convex-shaped diversion parts.

[0011] Preferably, the grooved sand screening unit is a U-shaped hook-shaped sand screening layer, including a first U-shaped groove, and hook-shaped parts are provided at both ends of the opening of the first U-shaped groove.

[0012] Preferably, the grooved sand screening unit is a double-U-shaped hook-shaped sand screening layer, the double-U-shaped hook-shaped sand screening layer includes a first U-shaped groove and a second U-shaped groove, hook-shaped parts are provided at both ends of the opening of the first U-shaped groove, one end of the second U-shaped groove is connected to the bottom of the first U-shaped groove, the other end is a free end, and hook-shaped parts are provided on the outer side of the bottom of the second U-shaped groove.

[0013] Preferably, the opening of the second U-shaped groove is larger than that of the first U-shaped groove, and the depth of the second U-shaped groove is smaller than that of the first U-shaped groove.

[0014] Preferably, the grooved sand screening unit is a double-U-shaped hook-shaped sand screening layer, the double-U-shaped hook-shaped sand screening layer includes a first U-shaped groove and a second U-shaped groove, hook-shaped parts are provided at both ends of the opening of the first U-shaped groove, one end of the second U-shaped groove is connected to the bottom of the first U-shaped groove, the other end is a free end, and hook-shaped parts are provided on the outer side of the bottom and the inner side of the free end of the second U-shaped groove.

[0015] Preferably, the curved sand screening unit is in the shape of a 1 / 8 four-leaf rose line, and the hook-shaped parts are provided on both sides of the 1 / 8 four-leaf rose line.

[0016] Preferably, sliding rails are further provided on the upper and lower sides of the window, the inverted omega-shaped windshield is vertically arranged between the upper and lower sliding rails, and the inverted omega-shaped windshield slides along the sliding rails and is positioned to adjust the distance between the sand blocking plate and the first sand screening layer.

[0017] Preferably, the inverted omega-shaped windshield is fixed at different positions on the sliding rail through buckles to position the inverted omega-shaped windshield on the sliding rail.

[0018] Preferably, the first sand screening layer and the second sand screening layer are fixedly welded to the inner side of the sand blocking plate.

[0019] The present invention also provides another adjustable sand screening device, which is characterized in that: it includes a sand blocking plate and a first sand screening layer, the sand blocking plate and the first sand screening layer are sequentially arranged from the outside to the inside of the window, and the distance between the sand blocking plate and the first sand screening layer is adjustable;

[0020] The sand blocking plate includes a plurality of vertically arranged sand blocking units side by side, and an arc-shaped recess is provided on the surface of the sand blocking unit in contact with the wind and sand for retaining and sliding down part of the wind and sand, and convex-shaped diversion parts are provided on both sides of the arc-shaped recess to direct another part of the wind and sand to the first sand screening layer;

[0021] The first sand screening layer includes a plurality of groove-shaped sand screening units arranged vertically side by side. The end of the convex-shaped diversion part of the sand baffle is butted against the notch of the groove-shaped sand screening unit. The windblown sand diverted by the convex-shaped diversion part collides with the groove-shaped sand screening unit and slides off. A first hook-shaped part for intercepting the windblown sand is arranged on the groove-shaped sand screening unit;

[0022] The sand baffle and the first sand screening layer face each other front and back to form a circuitous air flow path with multiple collisions.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] The inverted omega-shaped wind baffle, double U-shaped hook-equipped sand screening layer and 1 / 8 four-leaf rose line-shaped sand screening layer of the present invention have relatively complex special-shaped structures, which tightly cover the entire window plane and are equipped with grooves and hooks, providing sufficient area and space for the interception and collection of dust;

[0025] The sand baffle and the two sand screening layers of the present invention are both vertically installed, taking advantage of gravity, which is beneficial to the settlement and collection of dust and improves the sand blocking effect;

[0026] The inverted omega-shaped wind baffle of the present invention is installed in the slide rails of the upper and lower outer frames, and the opening can be adjusted by sliding to adapt to different weather conditions, and can be fully closed in extreme weather;

[0027] The 1 / 8 four-leaf rose line-shaped sand screening layer of the present invention can adjust the installation spacing according to requirements and is applicable to various industrial buildings under different climate conditions;

[0028] The structure of the present invention is adjustable. The sliding adjustable wind baffle can cope with different sandstorm degrees and particle sizes; the wind baffle and the two types of sand screening layers can also be adjusted in size according to requirements and adapt to various installation methods such as outer edge, inner edge, and embedding;

[0029] The present invention is of great significance to the ventilation design in sandstorm-prone areas, solves the problems that traditional sand-proof louvers are heavy and difficult to install and inconvenient to clean. The sand screening device is easy to install, has a reasonable structure, adjustable opening, and has good applicability to different degrees of sandstorms in desert areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is the installation dimension diagram of the adjustable sand screening device in Embodiment 1;

[0031] Figure 2 It is the cross-sectional view of the sand baffle in the incompletely closed state in Embodiment 1;

[0032] Figure 3 It is the longitudinal sectional view of the adjustable sand screening device in Embodiment 1;

[0033] Figure 4Schematic longitudinal sectional view of the adjustable sand sieve in Embodiment 2;

[0034] Figure 5 Schematic cross-sectional view of the adjustable sand sieve in Embodiment 2;

[0035] Figure 6 Schematic cross-sectional view of the adjustable sand sieve in Embodiment 3;

[0036] Figure 7 Schematic cross-sectional view of the adjustable sand sieve in Embodiment 4. Detailed implementation manners

[0037] To make the present invention more obvious and understandable, preferred embodiments are hereby described in detail in conjunction with the accompanying drawings as follows.

[0038] Embodiment 1

[0039] As Figures 1 to 3 shown, an adjustable sand sieve of the present invention is specifically a vertically periodic linear adjustable sand sieve applicable to extreme wind-sand climates, and its components include: a sand baffle 1, a first sand sieving layer 2, a second sand sieving layer 3, and a slide rail 4. The sand baffle 1, the first sand sieving layer 2, and the second sand sieving layer 3 are arranged in sequence from the outside to the inside of the window. The first sand sieving layer 2 and the second sand sieving layer 3 are welded and fixed to the inside of the sand baffle 1.

[0040] The sand baffle 1 includes a plurality of vertically arranged sand baffle units side by side. The side of the sand baffle unit in contact with the wind-sand is processed with an arc-shaped concave portion 11 for retaining and sliding down part of the wind-sand. The two sides of the arc-shaped concave portion 11 are convex-shaped diversion portions 12 for guiding another part of the wind-sand to the first sand sieving layer 2.

[0041] The sand baffle unit is a wind baffle in the shape of an inverted omega. The arc-shaped concave portion 11 is arranged in the middle of the bottom of the inverted omega-shaped wind baffle. The two side edges of the inverted omega-shaped wind baffle serve as the convex-shaped diversion portions 12. The slide rail 4 is installed on the upper and lower sides of the window outer frame. The direction of the slide rail 4 is along the inside-outside direction of the window. The central axis of the inverted omega-shaped wind baffle is perpendicular to the window outer frame and is vertically installed on the slide rail 4 on the upper and lower sides through a buckle. The inverted omega-shaped wind baffle slides along the slide rail 4 and is fixed at different positions on the slide rail 4 through the buckle to realize the distance adjustment between the sand baffle 1 and the first sand sieving layer 2. The opening can be adjusted by sliding to adapt to different weather conditions, and the sand baffle 1 can be fully closed in extreme weather.

[0042] The first sand sieving layer 2 includes a plurality of vertically arranged groove-shaped sand sieving units side by side. The projection of the groove-shaped sand sieving unit in the direction perpendicular to the sand sieving layer has no gaps. The end of the convex-shaped diversion portion 12 of the sand baffle 1 is docked with the groove opening of the groove-shaped sand sieving unit. The wind-sand guided by the convex-shaped diversion portion 12 collides with the groove-shaped sand sieving unit and slides down. A hook-shaped portion 23 for intercepting the wind-sand is processed on the groove-shaped sand sieving unit.

[0043] The second sand screening layer 3 includes a plurality of curved sand screening units arranged vertically side by side. Hook-shaped parts two 31 for intercepting wind and sand are processed on both sides of the curved sand screening units. The hook-shaped parts two 31 and the curved sand screening units form a fork-shaped structure. The curved sand screening unit is in the shape of a 1 / 8 four-leaf rose line type, and there are no gaps in the projection of the 1 / 8 four-leaf rose line type sand screening unit in the direction perpendicular to the sand screening layer. The hook-shaped parts two 31 are processed on both sides of the 1 / 8 four-leaf rose line type, and the direction of the hook-shaped parts two 31 faces the direction of the first sand screening layer 2.

[0044] In this embodiment, the groove-shaped sand screening unit is a double-U-shaped hook sand screening layer. The double-U-shaped hook sand screening layer includes a U-shaped groove one 21 and a U-shaped groove two 22. Hook-shaped parts one 23 are processed at both ends of the notch of the U-shaped groove one 21. One end of the U-shaped groove two 22 is connected to the bottom of the U-shaped groove one 21, and the other end is a free end. Hook-shaped parts one 23 are processed on the outer side of the bottom of the U-shaped groove two 22. The notch of the U-shaped groove two 22 is larger than the notch of the U-shaped groove one 21, and the depth of the U-shaped groove two 22 is smaller than the depth of the U-shaped groove one 21. The distance between adjacent U-shaped grooves one 21 is equal to the notch opening size of the U-shaped groove one 21.

[0045] This embodiment is mainly applicable to the situation of thick walls, rich composition of sand dust particle sizes, and extreme wind and sand climate, such as a 200-mm-thick building exterior wall. The dimensions of the specific implementation method are as Figure 1 shown. The inverted omega-shaped wind baffle and the double-U-shaped hook sand screening layer face each other front and back to form a multi-collision circuitous air flow path. Both the double-U-shaped sand screening layer and the 1 / 8 four-leaf rose line type sand screening layer have hooks. The inverted omega-shaped wind baffle, the double-U-shaped sand screening layer, and the 1 / 8 four-leaf rose line type sand screening layer all have the function of impacting sand dust to make it lose momentum and guiding the sand dust flow to the next collision collection point, and intercepting it tightly on the sand dust movement path. The working process is as follows:

[0046] When the air flow impacts the sand baffle 1, it is detained, the flow velocity decreases, and some sand grains are detained, losing kinetic energy and sliding down under the influence of gravity. Under the action of inertia, the air carries some sand grains and continues to move, colliding with the front edge of the first sand screening layer 2. Due to the influence of inertia force and gravity, the velocity directions of the air flow and the sand grains change differently, and the air and the entrained sand grains are separated by gas-solid separation. Some sand grains lose speed and slide down, and some move in the opposite direction and collide with the leeward side of the sand baffle 1 again. Similarly, after the impact, the sand grains decelerate again, some fall and are discharged, and some change the movement direction again and move towards the indoor direction. After being intercepted by the U-shaped grooves and the hook-shaped parts one 23 on the first sand screening layer 2, they lose speed and fall under the influence of gravity. The air flow after experiencing four impacts passes through the curved flow channel formed by the second sand screening layer 3, and the remaining sand dust is intercepted and impacted by the hook-shaped parts two 31 under the guidance of the curved edge of the sand screening layer, loses kinetic energy, and slides down under the influence of gravity.

[0047] The internal air flow experiences five processes: being retained by the wind deflector, impacting the front end of the sand screening layer, rebounding on the leeward side of the wind deflector, being drained through the hook grooves of the first sand screening layer, and being filtered by the second sand screening layer before entering the room, achieving gas-solid separation. The sand grains that fall during the five processes jointly fall into the lower frame with a sand guiding groove and are discharged under the action of gravity. When the air flow passes through this flow path, it must experience five or more impacts and cannot directly pass through the sand screening layer, enabling sufficient sand removal.

[0048] Embodiment 2

[0049] As Figure 4 and Figure 5 shown, in this embodiment, the grooved sand screening unit is a U-shaped sand screening layer with hooks, which is a special form of the double U-shaped sand screening layer with hooks in Embodiment 1. It includes a first U-shaped groove 21, and hook-shaped parts 23 are processed at both ends of the notch of the first U-shaped groove 21. The U-shaped sand screening layer with hooks is vertically welded between the upper and lower outer frames, and the welding position is located inside the sand baffle 1.

[0050] The rest is the same as that in Embodiment 1.

[0051] This embodiment is mainly applicable to the situation where the wall thickness is moderate, the sand dust particle size composition is rich, and the severity of wind and sand is general.

[0052] Embodiment 3

[0053] As Figure 6 shown, an adjustable sand screening device of the present invention includes: a sand baffle 1, a first sand screening layer 2, and a slide rail 4. The sand baffle 1 and the first sand screening layer 2 are arranged in sequence from the outside to the inside of the window, and the first sand screening layer 2 is welded and fixed inside the sand baffle 1.

[0054] The sand baffle 1 includes a plurality of vertically arranged side-by-side sand retaining units. On the side of the sand retaining unit in contact with the wind and sand, an arc-shaped recess 11 is processed to retain and slide down part of the wind and sand, and convex-shaped diversion parts 12 on both sides of the arc-shaped recess 11 direct the other part of the wind and sand to the first sand screening layer 2.

[0055] The sand retaining unit is a wind deflector in the shape of an inverted omega. The arc-shaped recess 11 is arranged in the middle of the bottom of the inverted omega-shaped wind deflector, and the two sides of the inverted omega-shaped wind deflector serve as the convex-shaped diversion parts 12. The slide rail 4 is installed on the upper and lower sides of the window outer frame, and the direction of the slide rail 4 is along the inside and outside direction of the window. The inverted omega-shaped wind deflector is vertically installed between the upper and lower slide rails 4 through a buckle. The inverted omega-shaped wind deflector slides along the slide rail 4 and is fixed at different positions on the slide rail 4 through a buckle to realize the distance adjustment between the sand baffle 1 and the first sand screening layer 2.

[0056] The first sand screening layer 2 includes a plurality of groove-shaped sand screening units arranged vertically side by side. The end of the convex-shaped diversion part 12 of the sand baffle 1 is butted against the notch of the groove-shaped sand screening unit. The wind-blown sand diverted by the convex-shaped diversion part 12 collides with the groove-shaped sand screening unit and slides off. A first hook-shaped part 23 for intercepting the wind-blown sand is processed on the groove-shaped sand screening unit.

[0057] In this embodiment, the groove-shaped sand screening unit is a double-U-shaped hook-shaped sand screening layer. The double-U-shaped hook-shaped sand screening layer includes a first U-shaped groove 21 and a second U-shaped groove 22. The two ends of the notch of the first U-shaped groove 21 are processed with the first hook-shaped part 23. One end of the second U-shaped groove 22 is connected to the bottom of the first U-shaped groove 21, and the other end is a free end. The outer side of the bottom and the inner side of the free end of the second U-shaped groove 22 are both processed with the first hook-shaped part 23. The notch of the second U-shaped groove 22 is larger than the notch of the first U-shaped groove 21, and the depth of the second U-shaped groove 22 is smaller than the depth of the first U-shaped groove 21. The distance between adjacent first U-shaped grooves 21 is equal to the notch opening size of the first U-shaped groove 21. The double-U-shaped hook-shaped sand screening layer is vertically welded between the upper and lower outer frames of the window, and the welding position is located inside the sand baffle 1.

[0058] This embodiment is mainly applicable to the situation where the wall is relatively thin, the dust content is small, and the wind-blown sand is not serious for most of the time.

[0059] Embodiment 4

[0060] As Figure 7 shown, in this embodiment, the groove-shaped sand screening unit is a U-shaped hook-shaped sand screening layer, which is a special form of the double-U-shaped hook-shaped sand screening layer in Embodiment 1. It includes a first U-shaped groove 21. The two ends of the notch of the first U-shaped groove 21 are processed with the first hook-shaped part 23. The U-shaped hook-shaped sand screening layer is vertically welded between the upper and lower outer frames, and the welding position is located inside the sand baffle 1.

[0061] The rest is the same as that in Embodiment 3.

[0062] This embodiment is mainly applicable to the situation where there is already a single-layer periodic linear sand screening layer but the sand prevention effect is not good, and it is installed outside the existing shutters.

Claims

1. An adjustable sand sieve, characterized in that: It includes a sand baffle (1) and at least two layers of sand screening layers. The sand screening layers include a first sand screening layer (2) and a second sand screening layer (3). The sand baffle (1), the first sand screening layer (2), and the second sand screening layer (3) are arranged in sequence from the outside to the inside of the window. The distance between the sand baffle (1) and the first sand screening layer (2) is adjustable; The sand baffle (1) includes a plurality of vertically arranged sand baffle units side by side. An arc-shaped recessed part (11) is arranged on the side of the sand baffle unit in contact with the wind and sand to retain and slide down part of the wind and sand. On both sides of the arc-shaped recessed part (11) are convex-shaped diversion parts (12) to direct another part of the wind and sand to the first sand screening layer (2); The first sand screening layer (2) includes a plurality of vertically arranged groove-shaped sand screening units. The end of the convex-shaped diversion part (12) of the sand baffle (1) is butted against the notch of the groove-shaped sand screening unit. The wind and sand diverted by the convex-shaped diversion part (12) collide with the groove-shaped sand screening unit and slide down. A hook-shaped part one (23) for intercepting wind and sand is arranged on the groove-shaped sand screening unit; The second sand screening layer (3) includes a plurality of vertically arranged curved sand screening units. Hook-shaped parts two (31) for intercepting wind and sand are arranged on both sides of the curved sand screening unit. The direction of the hook-shaped parts two (31) faces the direction of the first sand screening layer (2). The hook-shaped parts two (31) and the curved sand screening unit form a fork-shaped structure; The sand baffle (1) and the first sand screening layer (2) are arranged opposite to each other front and back to form a multi-collision circuitous air flow path; There are no gaps in the projection of the groove-shaped sand screening unit in the direction perpendicular to the sand screening layer; there are no gaps in the projection of the curved sand screening unit in the direction perpendicular to the sand screening layer; the sliding adjustable windshield can cope with different wind and sand degrees and particle sizes.

2. The adjustable sand sieve according to claim 1, characterized in that: The sand baffle unit is a windshield in the shape of an inverted omega. The arc-shaped recessed part (11) is arranged in the middle of the bottom of the inverted omega-shaped windshield. The two sides of the inverted omega-shaped windshield serve as the convex-shaped diversion parts (12).

3. The adjustable sand sieve according to claim 1 or 2, characterized in that: The groove-shaped sand screening unit is a U-shaped hook sand screening layer, including a U-shaped groove one (21). Hook-shaped parts one (23) are arranged at both ends of the notch of the U-shaped groove one (21).

4. The adjustable sand sieve according to claim 1 or 2, characterized in that: The groove-shaped sand screening unit is a double-U-shaped hook sand screening layer. The double-U-shaped hook sand screening layer includes a U-shaped groove one (21) and a U-shaped groove two (22). Hook-shaped parts one (23) are arranged at both ends of the notch of the U-shaped groove one (21). One end of the U-shaped groove two (22) is connected to the bottom of the U-shaped groove one (21), and the other end is a free end. Hook-shaped parts one (23) are arranged on the outer side of the bottom of the U-shaped groove two (22).

5. The adjustable sand sieve according to claim 4, characterized in that: The notch of the U-shaped groove two (22) is larger than the notch of the U-shaped groove one (21), and the depth of the U-shaped groove two (22) is smaller than the depth of the U-shaped groove one (21).

6. The adjustable sand sieve according to claim 1 or 2, characterized in that: The groove-shaped sand screening unit is a double-U-shaped hook sand screening layer. The double-U-shaped hook sand screening layer includes a U-shaped groove one (21) and a U-shaped groove two (22). Hook-shaped parts one (23) are arranged at both ends of the notch of the U-shaped groove one (21). One end of the U-shaped groove two (22) is connected to the bottom of the U-shaped groove one (21), and the other end is a free end. Hook-shaped parts one (23) are arranged on the outer side of the bottom and the inner side of the free end of the U-shaped groove two (22).

7. The adjustable sand sieve according to claim 2, characterized in that: The curved sand screening unit is in the shape of a 1 / 8 four-leaf rose curve, and the second hook part (31) is arranged on both sides of the 1 / 8 four-leaf rose curve.

8. The adjustable sand sieve according to claim 2, characterized in that: It further includes slide rails (4) arranged on the upper and lower sides of the window. The inverted omega-shaped wind baffle is vertically arranged between the slide rails (4) on the upper and lower sides. The inverted omega-shaped wind baffle slides along the slide rails (4) and is positioned to adjust the distance between the sand baffle (1) and the first sand screening layer (2).

9. The adjustable sand sieve according to claim 7, characterized in that: The inverted omega-shaped wind baffle is fixed to different positions on the slide rails (4) by buckles to realize the positioning of the inverted omega-shaped wind baffle on the slide rails (4).

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