Shallow sand air filtering device

Abstract

The shallow sand air filtering device comprises supporting legs, a filtering tank, a manhole, an air inlet pipe and an air outlet pipe, a sieve plate and a mounting plate are fixed to the inner wall of the filtering tank, the height of the bottom of the mounting plate is larger than that of the upper surface of the sieve plate, and a sand discharging pipe communicating with the inner wall of the filtering tank is fixed to the side wall of the filtering tank; a rotating shaft rotationally connected with the mounting plate is arranged on the mounting plate in a penetrating mode, a sand discharging plate is fixed to the lower end of the rotating shaft, the lower surface of the sand discharging plate abuts against the upper surface of the sieve plate, and a driving assembly used for driving the rotating shaft to rotate is jointly mounted on the filtering tank and the rotating shaft; when the filter material in the filter tank needs to be taken out, the sand discharge pipe is opened through the valve, and the rotating shaft is driven to rotate through the driving assembly, so that the sand discharge plate fixed to the lower end of the rotating shaft rotates, the filter material on the surface of the sieve plate is rotated into the sand discharge pipe and discharged, the tedious operation of manually taking out the filter material is omitted, and the filter material replacement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shallow sand filtration, in particular to a shallow sand air filtration device. Background Art

[0002] A shallow sand air filtration device is a device for purifying air, and its main function is to remove suspended particulate matter in the air, such as dust, pollen, smoke, etc. The device uses shallow sand as a filtering medium, and intercepts and captures impurities in the air through the gaps between sand grains.

[0003] In a Chinese utility model patent with the publication number CN217939569U, a shallow sand air filtration device is disclosed, which includes a system for filtration arranged in reverse and a system for backwashing; the system for filtration includes a turbid gas interface, an air filtration tank body, and a clean gas interface connected in sequence; the system for backwashing includes a backwashing water inlet interface, an air filtration tank body, and a backwashing drain interface connected in sequence.

[0004] Regarding the above related technologies, the inventor believes that there are the following defects: after long-term use, it is necessary to replace the filter material in the air filtration tank body. The above filtration device takes out the filter material from the filter material discharge port manually, which not only has cumbersome operation and consumes manpower, but also reduces the efficiency of filter material replacement. Content of the Utility Model

[0005] In order to solve the above problems, the utility model provides a shallow sand air filtration device.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a shallow sand air filtration device, including support legs, a filtration tank fixed to the upper ends of the support legs, a manhole provided on the filtration tank, an air inlet pipe fixed and communicated with the top of the filtration tank, and an air outlet pipe fixed and communicated with the bottom of the filtration tank. A sieve plate and a mounting plate are fixed to the inner wall of the filtration tank. The height of the bottom of the mounting plate is greater than the height of the upper surface of the sieve plate. A sand discharge pipe communicated with the inner wall of the filtration tank is fixed to the side wall of the filtration tank. The height of the inner bottom wall of the sand discharge pipe is equal to the height of the upper surface of the sieve plate. A valve is provided on the sand discharge pipe. A rotating shaft rotatably connected to the mounting plate is provided through the mounting plate. The axis of the rotating shaft coincides with the axis of the sieve plate. A sand discharge plate is fixed to the lower end of the rotating shaft. The lower surface of the sand discharge plate abuts against the upper surface of the sieve plate. A driving component for driving the rotating shaft to rotate is commonly installed on the filtration tank and the rotating shaft.

[0007] By adopting the above technical solution, when it is necessary to take out the filter media in the filter tank, the staff opens the sand discharge pipe through the valve, and then drives the rotating shaft to rotate through the driving component, so that the sand discharge plate fixed to the lower end of the rotating shaft rotates, and the filter media on the surface of the sieve plate is rotated into the sand discharge pipe and discharged, eliminating the cumbersome operation of manually taking out the filter media and improving the efficiency of filter media replacement.

[0008] Further, the driving component includes a cross bar penetrating through and rotatably connected to the side wall of the filter tank, a driving bevel gear arranged inside the filter tank and fixed to the end of the cross bar, a driven bevel gear fixed to the upper end of the rotating shaft and meshing with the driving bevel gear, and a hand wheel fixed to the end of the cross bar away from the driving bevel gear.

[0009] By adopting the above technical solution, when it is necessary to rotate the rotating shaft, the staff rotates the cross bar and the driving bevel gear through the hand wheel. Since the driving bevel gear meshes with the driven bevel gear and the driven bevel gear is fixed to the upper end of the rotating shaft, the rotating shaft rotates and drives the sand discharge plate to rotate, facilitating the rapid discharge of the filter media on the surface of the filter plate.

[0010] Further, a limiting component for limiting the cross bar is commonly installed on the filter tank and the cross bar. The limiting component includes a fixing plate fixed to the side wall of the filter tank. The fixing plate is sleeved on the cross bar and rotatably connected. The limiting component further includes a limiting nut sleeved on the cross bar and threadedly connected to the cross bar.

[0011] By adopting the above technical solution, when it is not necessary to discharge the filter media, the staff needs to tighten the limiting nut so that the side wall of the limiting nut abuts against the side wall of the fixing plate, thereby restricting the rotation of the cross bar and reducing the probability of the sand discharge plate rotating due to the rotation of the cross bar during the air filtration process.

[0012] Further, an annular gasket is sleeved on the cross bar between the limiting nut and the fixing plate.

[0013] By adopting the above technical solution, the annular gasket is made of rubber material and has a large friction coefficient on its surface. The side wall of the limiting nut cooperates with the side wall of the fixing plate and abuts against the annular gasket, increasing the friction force between the side wall of the limiting nut and the side wall of the fixing plate and reducing the probability of the limiting nut loosening.

[0014] Further, a first hollow groove is provided on the driving bevel gear, and a second hollow groove is provided on the driven bevel gear.

[0015] By adopting the above technical solution, the first hollow groove and the second hollow groove reduce the weight of the driving bevel gear and the driven bevel gear, making it easier for the staff to drive the sand discharge plate to rotate through the driving component.

[0016] Further, an arc-shaped groove is provided on the inner wall of the filter tank on the side close to the sand discharge pipe.

[0017] By adopting the above technical solution, the opening of the arc-shaped groove enables the filter material to move along the inner wall of the arc-shaped groove towards the side of the sand discharge pipe during the rotation of the sand discharge plate, which is beneficial to the movement of the filter material into the sand discharge pipe.

[0018] Furthermore, the sand discharge pipe is arranged to incline downward towards the side away from the filter tank.

[0019] By adopting the above technical solution, the sand discharge pipe arranged to incline downward enables the filter material entering the sand discharge pipe to move downward under the action of gravity, which is beneficial to the rapid discharge of the filter material from the sand discharge pipe.

[0020] Furthermore, galvanized layers are provided on the surfaces of both the driving bevel gear and the driven bevel gear.

[0021] By adopting the above technical solution, zinc has good rolling property, wear resistance, corrosion resistance, castability, and good mechanical properties at normal temperature. The setting of the galvanized layer improves the rust and corrosion resistance of the driving bevel gear and the driven bevel gear, which is beneficial to the normal use of the driving assembly.

[0022] In summary, the present utility model has the following beneficial effects:

[0023] 1. In the present application, when it is necessary to take out the filter material in the filter tank, the staff opens the sand discharge pipe through the valve, and then drives the rotation of the rotating shaft through the driving assembly, so that the sand discharge plate fixed to the lower end of the rotating shaft rotates, and the filter material on the surface of the sieve plate is rotated into the sand discharge pipe and discharged, eliminating the cumbersome operation of manually taking out the filter material and improving the efficiency of filter material replacement;

[0024] 2. In the present application, when it is necessary to rotate the rotating shaft, the staff rotates the cross bar and the driving bevel gear through the hand wheel. Since the driving bevel gear meshes with the driven bevel gear and the driven bevel gear is fixed to the upper end of the rotating shaft, the rotating shaft rotates and drives the sand discharge plate to rotate, facilitating the rapid discharge of the filter material on the surface of the filter plate;

[0025] 3. In the present application, when it is not necessary to discharge the filter material, the staff needs to tighten the limit nut so that the side wall of the limit nut abuts against the side wall of the fixing plate, thereby restricting the rotation of the cross bar and reducing the probability of the sand discharge plate rotating due to the rotation of the cross bar during the air filtration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the overall structural schematic diagram of an embodiment of the present utility model;

[0027] Figure 2 is the cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0028] Figure 3 is Figure 2 the enlarged schematic diagram at A in

[0029] Figure 4 is Figure 2 The enlarged schematic view of position B in

[0030] In the figure: 1, support leg; 2, filter tank; 21, manhole; 22, intake pipe; 23, outlet pipe; 24, arc groove; 3, sieve plate; 4, mounting plate; 5, sand discharge pipe; 51, valve; 6, rotating shaft; 7, sand discharge plate; 8, driving assembly; 81, cross bar; 82, driving bevel gear; 821, first hollow groove; 83, driven bevel gear; 831, second hollow groove; 84, hand wheel; 9, limiting assembly; 91, fixing plate; 92, limiting nut; 93, annular gasket. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] As Figures 1-4 shown, the embodiments of the present application disclose a shallow sand air filtration device, including a support leg 1, a filter tank 2, a manhole 21, an intake pipe 22, an outlet pipe 23, a sieve plate 3, a mounting plate 4, a sand discharge pipe 5, a valve 51, a rotating shaft 6, a sand discharge plate 7 and a driving assembly 8.

[0033] The support leg 1 is in the shape of a round rod, and multiple support legs 1 are provided. The filter tank 2 is a commonly used filter tank 2 in the prior art and applicable to this embodiment, and the filter tank 2 is fixed to the upper end of the support leg 1. The manhole 21 is a commonly used manhole 21 in the prior art and applicable to this embodiment, and the manhole 21 is provided on the filter tank 2. The intake pipe 22 is in the shape of a vertically arranged round tube, and the intake pipe 22 is fixed and communicated with the top of the filter tank 2. The outlet pipe 23 is in the shape of a vertically arranged round tube, and the outlet pipe 23 is fixed and communicated with the bottom of the filter tank 2. The sieve plate 3 is in the shape of a round plate, and the sieve plate 3 is fixed to the inner wall of the filter tank 2. The mounting plate 4 is in the shape of a rectangular plate, and the mounting plate 4 is fixed to the inner wall of the filter tank 2, and the height of the bottom of the mounting plate 4 is greater than the height of the upper surface of the sieve plate 3. The sand discharge pipe 5 is in the shape of a round tube, and the sand discharge pipe 5 is fixed and communicated with the side wall of the filter tank 2, and the height of the inner bottom wall of the sand discharge pipe 5 is equal to the height of the upper surface of the sieve plate 3. The valve 51 is a commonly used valve 51 in the prior art and applicable to this embodiment, and the valve 51 is provided on the sand discharge pipe 5. The rotating shaft 6 is in the shape of a vertically arranged round tube, the rotating shaft 6 penetrates through the mounting plate 4 and is rotatably connected to the mounting plate 4, and the axis of the rotating shaft 6 coincides with the axis of the sieve plate 3. The sand discharge plate 7 is in the shape of a rectangular plate, the sand discharge plate 7 is fixed to the lower end of the rotating shaft 6, and the lower surface of the sand discharge plate 7 abuts against the upper surface of the sieve plate 3.

[0034] The driving assembly 8 is installed on the filter tank 2 and the rotating shaft 6 and is used to drive the rotating shaft 6 to rotate. The driving assembly 8 includes a cross bar 81, a driving bevel gear 82, a driven bevel gear 83 and a hand wheel 84. The cross bar 81 is a horizontally arranged round rod-shaped structure. The cross bar 81 penetrates through the side wall of the filter tank 2 and is rotatably connected. The driving bevel gear 82 is arranged inside the filter tank 2. The driving bevel gear 82 is fixed to the end of the cross bar 81, and the axis of the driving bevel gear 82 coincides with the axis of the cross bar 81. The driven bevel gear 83 is fixed to the upper end of the rotating shaft 6. The driven bevel gear 83 meshes with the driving bevel gear 82, and the axis of the driven bevel gear 83 coincides with the axis of the rotating shaft 6. The hand wheel 84 is fixed to one end of the cross bar 81 away from the driving bevel gear 82, and the axis of the hand wheel 84 coincides with the axis of the cross bar 81.

[0035] When it is necessary to take out the filter media in the filter tank 2, the staff opens the sand discharge pipe 5 through the valve 51, and then rotates the cross bar 81 and the driving bevel gear 82 through the hand wheel 84. Since the driving bevel gear 82 meshes with the driven bevel gear 83 and the driven bevel gear 83 is fixed to the upper end of the rotating shaft 6, the rotating shaft 6 is rotated, so that the sand discharge plate 7 fixed to the lower end of the rotating shaft 6 rotates, and the filter media on the surface of the sieve plate 3 is rotated into the sand discharge pipe 5 and discharged, eliminating the cumbersome operation of manually taking out the filter media and improving the efficiency of filter media replacement.

[0036] In order to reduce the probability of the sand discharge plate 7 rotating during the air filtration process, a limiting assembly 9 is jointly installed on the filter tank 2 and the cross bar 81 for limiting the cross bar 81. The limiting assembly 9 includes a fixing plate 91, a limiting nut 92 and an annular gasket 93. The fixing plate 91 is a rectangular plate-shaped structure. The fixing plate 91 is fixed to the side wall of the filter tank 2. The fixing plate 91 is sleeved on the cross bar 81 and is rotatably connected to the cross bar 81. The limiting nut 92 is sleeved on the cross bar 81 and is threadedly connected to the cross bar 81, and the axis of the limiting nut 92 coincides with the axis of the cross bar 81. The annular gasket 93 is sleeved on the cross bar 81, and the annular gasket 93 is located between the limiting nut 92 and the fixing plate 91. When the filter media does not need to be discharged, the staff needs to tighten the limiting nut 92 so that the side wall of the limiting nut 92 cooperates with the side wall of the fixing plate 91 and presses against the annular gasket 93, thereby restricting the rotation of the cross bar 81, thus reducing the probability of the sand discharge plate 7 rotating due to the rotation of the cross bar 81 during the air filtration process. The annular gasket 93 is made of rubber material, and its surface has a large friction coefficient, increasing the friction force between the side wall of the limiting nut 92 and the side wall of the fixing plate 91 and reducing the probability of the limiting nut 92 loosening.

[0037] In order to make it easier for the staff to drive the sand discharge plate 7 to rotate through the driving component 8, a first hollow groove 821 is provided on the driving bevel gear 82, and a second hollow groove 831 is provided on the driven bevel gear 83. The first hollow groove 821 and the second hollow groove 831 reduce the weights of the driving bevel gear 82 and the driven bevel gear 83, so that it is easier for the staff to drive the sand discharge plate 7 to rotate through the driving component 8.

[0038] In order to facilitate the movement of the filter material into the sand discharge pipe 5, an arc-shaped groove 24 is provided on the inner wall of the filter tank 2 on the side close to the sand discharge pipe 5. The provision of the arc-shaped groove 24 enables the filter material to move along the inner wall of the arc-shaped groove 24 towards the side of the sand discharge pipe 5 during the rotation of the sand discharge plate 7, thus facilitating the movement of the filter material into the sand discharge pipe 5.

[0039] In order to facilitate the rapid discharge of the filter material from the sand discharge pipe 5, the sand discharge pipe 5 is inclined downward towards the side away from the filter tank 2. The sand discharge pipe 5 arranged inclined downward enables the filter material entering the sand discharge pipe 5 to move downward under the action of gravity, thus facilitating the rapid discharge of the filter material from the sand discharge pipe 5.

[0040] In order to facilitate the normal use of the driving component 8, galvanized layers (not shown in the figure) are provided on the surfaces of the driving bevel gear 82 and the driven bevel gear 83. Zinc has good rolling property, wear resistance, corrosion resistance, castability, and good mechanical properties at normal temperature. The provision of the galvanized layers improves the rust and corrosion prevention performance of the driving bevel gear 82 and the driven bevel gear 83, thus facilitating the normal use of the driving component 8.

[0041] The working principle of a shallow sand air filtration device in this embodiment is as follows: When it is necessary to take out the filter material in the filter tank 2, the staff opens the sand discharge pipe 5 through the valve 51, and then rotates the cross bar 81 and the driving bevel gear 82 through the hand wheel 84. Since the driving bevel gear 82 meshes with the driven bevel gear 83 and the driven bevel gear 83 is fixed to the upper end of the rotating shaft 6, the rotating shaft 6 is rotated, so that the sand discharge plate 7 fixed to the lower end of the rotating shaft 6 rotates, turning the filter material on the surface of the sieve plate 3 into the sand discharge pipe 5 and discharging it, eliminating the cumbersome operation of manually taking out the filter material and improving the efficiency of filter material replacement.

[0042] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. Any technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A shallow sand air filter device, comprising a support leg (1), a filter tank (2) fixed to the upper end of the support leg (1), a manhole (21) arranged on the filter tank (2), an air inlet pipe (22) fixed to and connected with the top of the filter tank (2), and an air outlet pipe (23) fixed to and connected with the bottom of the filter tank (2), wherein: The inner wall of the filter tank (2) is fixed with a sieve plate (3) and a mounting plate (4), the bottom of the mounting plate (4) having a height greater than the upper surface of the sieve plate (3), the side wall of the filter tank (2) is fixed with a sand discharge pipe (5) communicating with the inner wall of the filter tank (2), the inner bottom wall height of the sand discharge pipe (5) being equal to the upper surface of the sieve plate (3), the sand discharge pipe (5) being provided with a valve (51), the mounting plate (4) being provided with a rotating shaft (6) rotatably connected to the mounting plate (4), the axis of the rotating shaft (6) being coincident with the axis of the sieve plate (3), the lower end of the rotating shaft (6) being fixed with a sand discharge plate (7), the lower surface of the sand discharge plate (7) being in contact with the upper surface of the sieve plate (3), and the filter tank (2) and the rotating shaft (6) being jointly provided with a driving component (8) for driving the rotating shaft (6) to rotate.

2. A shallow sand air filter device according to claim 1, characterized in that: The driving assembly (8) comprises a cross bar (81) which penetrates and is rotatably connected to the side wall of the filter tank (2), a driving bevel gear (82) which is arranged in the filter tank (2) and fixed to the end of the cross bar (81), a driven bevel gear (83) which is fixed to the upper end of the rotating shaft (6) and meshes with the driving bevel gear (82), and a hand wheel (84) which is fixed to an end of the cross bar (81) away from the driving bevel gear (82).

3. A shallow sand air filter device according to claim 2, characterized in that: The filter tank (2) and the cross bar (81) are jointly provided with a limit assembly (9) for limiting the position of the cross bar (81); the limit assembly (9) comprises a fixing plate (91) fixed to the side wall of the filter tank (2); the fixing plate (91) is sleeved on the cross bar (81) and rotatably connected; the limit assembly (9) further comprises a limit nut (92) sleeved on the cross bar (81) and threadedly connected to the cross bar (81).

4. A shallow sand air filter device according to claim 3, characterized in that: The cross bar (81) is sleeved with an annular gasket (93) located between the limiting nut (92) and the mounting plate (4).

5. A shallow sand air filter device according to claim 4, characterized in that: The driving bevel gear (82) is provided with a first hollow groove (821), and the driven bevel gear (83) is provided with a second hollow groove (831).

6. A shallow sand air filter device according to claim 5, characterized in that: An arc-shaped groove (24) is formed on the inner wall of the filter tank (2) on the side close to the sand discharge pipe (5).

7. A shallow sand air filter device according to claim 6, characterized in that: The sand discharge pipe (5) is arranged to be inclined downward toward the side away from the filter tank (2).

8. A shallow sand air filter device according to claim 7, characterized in that: The surfaces of the active bevel gear (82) and the driven bevel gear (83) are both provided with a zinc coating.

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