CN112221922A

CN112221922A - Building sand filtering device capable of freely switching filtering modes

Info

Publication number: CN112221922A
Application number: CN202011061354.9A
Authority: CN
Inventors: 胡泽海
Original assignee: Jinhua Kaisen Intelligent Technology Co ltd
Current assignee: Jinhua Kaisen Intelligent Technology Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-01-15

Abstract

The invention relates to the related field of building engineering, and discloses a building sand filtering device capable of freely switching filtering modes, which comprises a main body box, wherein a rotary drum cavity is arranged in the main body box, the lower end wall of the rotary drum cavity is communicated with a sand outlet with a downward opening, a bevel gear cavity positioned on the right side of the rotary drum cavity is arranged in the main body box, a main spline shaft extending leftwards into the rotary drum cavity and rightwards into the bevel gear cavity is connected in a rotating fit manner at the left end wall of the bevel gear cavity, a pushing block is driven by a cam to move leftwards and rightwards, and the filtering effect of a, thereby achieving the purpose of vibrating and filtering the building sand, improving the overall filtering efficiency of the sand compared with a single filter screen, realizing the free switching of the filter screens with different specifications by rotating the switching knob, therefore, the building sand with different specifications can be obtained, the applicability of the sand is improved, and meanwhile, the use of the sand is more in line with the specification.

Description

Building sand filtering device capable of freely switching filtering modes

Technical Field

The invention relates to the related field of constructional engineering, in particular to a sand filtering device for a building, which can freely switch filtering modes.

Background

In order to enable the building quality to meet the national requirements, the sand generally needs to be filtered and screened before being used, the building sand in the national standard is divided into three specifications of coarse sand, medium sand and fine sand, but the aim is to manually shovel the sand and throw the sand to a filter screen for filtering the sand, the efficiency of the filtering mode is low, the coarse sand can only be roughly separated, and therefore the applicability of the sand is reduced, and meanwhile, the qualified building sand containing a certain proportion of the coarse sand, the medium sand and the fine sand cannot be obtained.

Disclosure of Invention

The invention aims to provide a building sand filtering device capable of freely switching filtering modes, which can overcome the defects in the prior art, thereby improving the practicability of equipment.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a building sand filtering device capable of freely switching filtering modes, which comprises a main body box, wherein a rotary drum cavity is arranged in the main body box, the lower end wall of the rotary drum cavity is communicated with a sand outlet with a downward opening, a bevel gear cavity positioned on the right side of the rotary drum cavity is arranged in the main body box, a main spline shaft which extends leftwards into the rotary drum cavity and rightwards into the bevel gear cavity is connected in a rotating fit manner in the left end wall of the bevel gear cavity, a secondary spline shaft which extends rightwards into the rotary drum cavity and corresponds to the main spline shaft is connected in a rotating fit manner in the left end wall of the rotary drum cavity, a rotary main shaft which extends leftwards into the secondary spline shaft and is in spline fit connection with the secondary spline shaft is connected in a spline fit manner in the main spline shaft, a rotary drum fixedly connected with the rotary main shaft is arranged in the rotary drum cavity, and a spring fixing disc positioned on the left side of the, spring fixed disk right-hand member face with fixedly connected with vibrations spring between the rotary drum left end face, be equipped with the filter chamber in the rotary drum, filter chamber left end wall intercommunication is equipped with the opening and just is located left the lower opening of rotary main shaft downside, filter chamber left end wall intercommunication is equipped with the opening and just is located left the last opening of rotary main shaft upside, main part case left end face fixedly connected with sand inlet box, be equipped with the ascending sand inlet chamber of opening in the sand inlet box, rotary drum chamber left end wall fixedly connected with the linking piece that sand inlet box corresponds, sand inlet chamber right-hand member wall intercommunication is equipped with and extends to right linking piece in and the opening right just can with down the opening with the sand passageway that goes up the opening and correspond.

On the basis of the technical scheme, the left and right ends of the lower end surface of the main box are fixedly connected with bilaterally symmetrical supporting blocks, the right end wall of the rotary drum cavity is communicated with a cam push rod cavity, the right end wall of the cam push rod cavity is communicated with a cam cavity, the upper side of the cam cavity is provided with a friction wheel cavity, the upper end wall of the friction wheel cavity is communicated with a switching slide block cavity positioned on the right side of the bevel gear cavity, the upper side of the switching slide block cavity is provided with a line wheel cavity positioned on the right side of the bevel gear cavity, the right side of the cam cavity is provided with a motor fixedly connected with the main box, the rotary drum is internally provided with a fine sand limiting groove with a right opening and positioned on the upper side of the rotary main shaft, the rotary drum is internally provided with a coarse sand limiting groove with a right opening and positioned on the rear side of the rotary main shaft, the lower side of the rotary drum is provided, the limiting device comprises a limiting magnetic block cavity, a small magnetic block cavity is communicated with the tail end of the right side of the upper end wall of the limiting magnetic block cavity, the small magnetic block cavity is connected with a small magnetic block in a sliding fit mode, the limiting magnetic block cavity is connected with a limiting magnetic block which can correspond to the fine sand limiting groove, the coarse sand limiting groove, the medium sand limiting groove and the small magnetic block in a sliding fit mode, and a limiting spring is fixedly connected between the right end face of the limiting magnetic block and the right end wall of the limiting magnetic block cavity.

On the basis of the technical scheme, a main bevel gear fixedly connected with the main spline shaft is arranged in the bevel gear cavity, an auxiliary bevel gear shaft which extends downwards into the friction wheel cavity and extends upwards into the bevel gear cavity is connected to the lower end wall of the bevel gear cavity in a rotating fit manner, an auxiliary bevel gear fixedly connected with the auxiliary bevel gear shaft is connected to the lower side of the main bevel gear in a power fit manner, a torsion spring is fixedly connected between the right end surface of the main spline shaft and the right end wall of the bevel gear cavity, a rotating friction wheel fixedly connected with the auxiliary bevel gear shaft is arranged in the friction wheel cavity, a cam shaft which extends downwards into the cam cavity and extends upwards into the friction wheel cavity and is positioned on the lower side of the auxiliary bevel gear shaft is connected to the lower end wall of the friction wheel cavity in a rotating fit manner, and a vibrating friction wheel which is fixedly connected with the cam shaft and corresponds to the rotating friction wheel is, the cam cavity is internally provided with a cam fixedly connected with the cam shaft, the left end face of the cam is abutted with a cam push block connected with the cam cavity in a sliding fit manner, the left end face of the cam push block is fixedly connected with a cam push rod which extends leftwards to penetrate through the cam push rod cavity into the rotary drum cavity and is abutted with the rotary drum cavity, and a cam spring is fixedly connected between the left end face of the cam push block and the left end wall of the cam cavity.

On the basis of the technical scheme, a switching slide block is connected in a sliding fit manner in the switching slide block cavity, a switching slide block spring is fixedly connected between the upper end surface of the switching slide block and the upper end wall of the switching slide block cavity, a motor spline shaft which extends upwards into the friction wheel cavity and is connected with the main body box in a rotating fit manner is fixedly connected on the upper end surface of the motor, a switching main shaft which extends upwards through the friction wheel cavity to the switching slide block cavity and is connected with the switching slide block in a rotating fit manner is connected in a spline fit manner in the motor spline shaft, a driving friction wheel which is abutted against the vibrating friction wheel and can be abutted against the rotating friction wheel is fixedly connected on the switching main shaft, a line wheel shaft which extends rightwards to the outside and leftwards to the line wheel cavity is connected in a rotating fit manner in the right end wall of the line wheel cavity, and, and the right end face of the line shaft is fixedly connected with a switching knob located outside.

On the basis of the technical scheme, the lower end wall of the filter cavity is communicated with a fine filter screen cavity, the opening of which is downward and can be corresponding to the sand outlet, a fine filter screen is fixedly connected in the fine filter screen cavity, the upper end wall of the filter cavity is communicated with a middle filter screen cavity, the opening of which is upward and can be corresponding to the sand outlet, a middle filter screen is fixedly connected in the middle filter screen cavity, the front end wall of the filter cavity is communicated with a coarse sand outlet, the opening of which is forward and can be corresponding to the sand outlet, the right end surface of the limiting magnetic block and the stay cord of the line wheel fixedly connected between the line wheels are arranged, the upper end surface of the small magnetic block and the switching stay cord fixedly connected between the upper end surfaces of the switching slide blocks are arranged, and the attraction force between the limiting magnetic.

The invention has the beneficial effects that: move the filter effect of removal cooperation filter screen simultaneously about through cam drive ejector pad to can reach the filterable purpose of sand vibrations for building, promote the whole filtration efficiency of sand for single filter screen, and can realize the free switching of the filter screen of different specifications through rotating the switching knob, thereby can obtain the sand for building of different specifications, improve the suitability of sand, also make the use of sand accord with the standard more simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view showing the overall construction of a filtering apparatus for construction sand according to the present invention, which can freely switch a filtering mode;

FIG. 2 is an enlarged schematic view of A in FIG. 1;

FIG. 3 is a schematic diagram of B-B of FIG. 1;

fig. 4 is a schematic view of the structure of C-C in fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

With reference to fig. 1-4, the building sand filtering device capable of freely switching filtering modes comprises a main body box 10, a rotary drum cavity 23 is arranged in the main body box 10, a sand outlet 58 with a downward opening is communicated with the lower end wall of the rotary drum cavity 23, a bevel gear cavity 42 located on the right side of the rotary drum cavity 23 is arranged in the main body box 10, a main spline shaft 61 extending leftwards into the rotary drum cavity 23 and rightwards into the bevel gear cavity 42 is connected in a rotating fit manner in the left end wall of the bevel gear cavity 42, a secondary spline shaft 12 extending rightwards into the rotary drum cavity 23 and corresponding to the main spline shaft 61 is connected in the left end wall of the rotary drum cavity 23 in a rotating fit manner, a rotary main shaft 24 extending leftwards into the rotary drum cavity 23 and connected with the secondary spline shaft 12 in a spline fit manner is connected in the main spline shaft 61, be equipped with in the revolving drum chamber 23 with rotatory main shaft 24 fixed connection's rotary drum 19, the cooperation of rotating on the minor spline shaft 12 is connected with and is located the left spring fixed disk 11 of rotary drum 19, the 11 right-hand member face of spring fixed disk with fixedly connected with vibrations spring 20 between the 19 left-hand member face of rotary drum, be equipped with filter chamber 18 in the rotary drum 19, filter chamber 18 left end wall intercommunication is equipped with the opening and just is located the lower opening 59 of rotatory main shaft 24 downside left side, filter chamber 18 left end wall intercommunication is equipped with the opening and just is located the last opening 21 of rotatory main shaft 24 upside left side, main part case 10 left end face fixedly connected with sand inlet box 13, be equipped with the ascending sand inlet chamber 14 of opening in the sand inlet box 13, rotary drum chamber 23 left end wall fixedly connected with the corresponding linking piece 16 of sand inlet box 13, sand inlet chamber 14 right-hand member wall intercommunication is equipped with and extends to right in the linking piece 16 and the opening just can with lower opening 59 And the upper through opening 21 corresponds to the sand passage 62.

In addition, in one embodiment, the left and right ends of the lower end surface of the main body box 10 are fixedly connected with bilaterally symmetrical supporting blocks 15, the right end wall of the rotary cylinder cavity 23 is communicated with a cam push rod cavity 37, the right end wall of the cam push rod cavity 37 is communicated with a cam cavity 60, the upper side of the cam cavity 60 is provided with a friction wheel cavity 32, the upper end wall of the friction wheel cavity 32 is communicated with a switching slide block cavity 49 positioned at the right side of the bevel gear cavity 42, the upper side of the switching slide block cavity 49 is provided with a line wheel cavity 45 positioned at the right side of the bevel gear cavity 42, the right side of the cam cavity 60 is provided with a motor 41 fixedly connected with the main body box 10, the rotary cylinder 19 is provided with a fine sand limiting groove 65 with an opening towards the right and positioned at the upper side of the rotary main shaft 24, the rotary cylinder 19 is provided with a coarse sand limiting groove 64 with an opening towards the right and positioned at the rear side of the rotary main, the rotary drum type bevel gear grinding machine is characterized in that a limiting magnetic block cavity 26 located on the upper side of the bevel gear cavity 42 is communicated with the right end wall of the rotary drum cavity 23, a small magnetic block cavity 67 is communicated with the right end of the upper end wall of the limiting magnetic block cavity 26, a small magnetic block 66 is connected in the small magnetic block cavity 67 in a sliding fit mode, a limiting magnetic block 25 capable of being matched with the fine sand limiting groove 65, the coarse sand limiting groove 64, the medium sand limiting groove 63 and the small magnetic block 66 in a sliding fit mode is connected in the limiting magnetic block cavity 26 in a sliding fit mode, and a limiting spring 27 is fixedly connected between the right end face of the limiting magnetic block 25 and.

In addition, in one embodiment, a main bevel gear 43 fixedly connected with the main spline shaft 61 is arranged in the bevel gear cavity 42, a secondary bevel gear shaft 31 extending downwards into the friction wheel cavity 32 and upwards into the bevel gear cavity 42 is connected in a rotationally fitting manner in the lower end wall of the bevel gear cavity 42, a secondary bevel gear 30 fixedly connected with the secondary bevel gear shaft 31 is connected in a rotationally fitting manner at the lower side of the main bevel gear 43, a torsion spring 44 is fixedly connected between the right end surface of the main spline shaft 61 and the right end wall of the bevel gear cavity 42, a rotating friction wheel 33 fixedly connected with the secondary bevel gear shaft 31 is arranged in the friction wheel cavity 32, a cam shaft 35 extending downwards into the cam cavity 60 and upwards into the friction wheel cavity 32 and positioned at the lower side of the secondary bevel gear shaft 31 is connected in a rotationally fitting manner in the lower end wall of the friction wheel cavity 32, be equipped with in the friction wheel chamber 32 with camshaft 35 fixed connection and with the vibrations friction wheel 34 that the rotation friction wheel 33 corresponds, be equipped with in the cam chamber 60 with camshaft 35 fixed connection's cam 40, the butt of cam 40 left end face have with the cam ejector pad 39 that cam chamber 60 sliding fit is connected, the left end face fixedly connected with of cam ejector pad 39 extends left and runs through cam ejector pad chamber 37 extremely in the rotary drum chamber 23 and with the cam push rod 36 of rotary drum chamber 23 butt, cam ejector pad 39 left end face with fixedly connected with cam spring 38 between the cam chamber 60 left end wall.

In addition, in one embodiment, a switching slider 51 is connected in the switching slider cavity 49 in a sliding fit manner, a switching slider spring 50 is fixedly connected between the upper end surface of the switching slider 51 and the upper end wall of the switching slider cavity 49, a motor spline shaft 54 which extends upwards into the friction wheel cavity 32 and is connected with the main body box 10 in a rotating fit manner is fixedly connected on the upper end surface of the motor 41, a switching main shaft 52 which extends upwards through the friction wheel cavity 32 into the switching slider cavity 49 and is connected with the switching slider 51 in a rotating fit manner is connected in a spline fit manner in the motor spline shaft 54, a driving friction wheel 53 which is abutted against the vibrating friction wheel 34 and can be abutted against the rotating friction wheel 33 is fixedly connected on the switching main shaft 52, a line shaft 47 which extends to the outside rightwards and extends to the leftwards into the line wheel cavity 45 is connected in a rotating fit manner in the right end wall of the line wheel cavity, a reel 48 fixedly connected with a reel shaft 47 is arranged in the reel cavity 45, and a switching knob 46 positioned outside is fixedly connected with the right end face of the reel shaft 47.

In addition, in one embodiment, the lower end wall of the filter chamber 18 is communicated with a fine filter screen chamber 56 which is opened downwards and can correspond to the sand outlet 58, the fine filter screen cavity 56 is internally and fixedly connected with a fine filter screen 17, the upper end wall of the filter cavity 18 is communicated with a middle filter screen cavity 57 which has an upward opening and can correspond to the sand outlet 58, the middle filter screen cavity 57 is fixedly connected with the middle filter screen 22, the front end wall of the filter cavity 18 is communicated with a coarse sand outlet 55 which is provided with a forward opening and can correspond to the sand outlet 58, a wire wheel pull rope 28 is fixedly connected between the right end surface of the limit magnetic block 25 and the wire wheel 48, a switching pull rope 29 is fixedly connected between the upper end surface of the small magnetic block 66 and the upper end surface of the switching slide block 51, the attractive force between the limit magnetic block 25 and the small magnetic block 66 is greater than the thrust of the switching slider spring 50.

The fixing and connecting method in this embodiment includes, but is not limited to, bolting, welding, and the like.

As shown in fig. 1-4, when the apparatus of the present invention is in an initial state, the limiting magnetic block 25 is pushed by the limiting spring 27 to move leftward to correspond to the fine sand limiting groove 65, so that the limiting magnetic block 25 and the small magnetic block 66 are in a disengaged state, and the switching slider 51 is pushed by the switching slider spring 50 to move downward, so that the switching spindle 52 drives the driving friction wheel 53 to move downward to just abut against the vibrating friction wheel 34; sequence of mechanical actions of the whole device: when the sand filter works, building sand needing to be filtered is poured into the sand inlet cavity 14, so that the building sand enters the filter cavity 18 through the sand channel 62 and the lower through opening 59, at the moment, the motor 41 is started to drive the motor spline shaft 54 to rotate so as to drive the switching main shaft 52 to rotate, the switching main shaft 52 drives the vibration friction wheel 34 to rotate through the driving friction wheel 53, the vibration friction wheel 34 drives the cam 40 to rotate through the cam shaft 35, so that the cam push block 39 overcomes the thrust of the cam spring 38 and the vibration spring 20 through the cam push rod 36 to drive the rotary drum 19 to do left-right reciprocating motion, and meanwhile, the fine filter screen 17 and the sand outlet 58 are matched, so that the vibration filter effect on the building sand is realized, the filter speed is increased compared with a single filter screen, and fine sand is filtered at the moment; when the thickness of the filtered sand needs to be changed, namely the medium sand needs to be filtered, the switching knob 46 is rotated at the moment, the switching knob 46 drives the reel 48 to rotate through the reel shaft 47, so that the reel pull rope 28 is gradually tightened, the limiting magnetic block 25 is pulled to move rightwards, and when the limiting magnetic block 25 moves rightwards to be completely separated from the fine sand limiting groove 65, the limiting magnetic block 25 just corresponds to the small magnetic block 66 at the moment, so that the attractive force between the small magnetic block 66 and the limiting magnetic block 25 overcomes the thrust of the switching slider spring 50 through the switching pull rope 29, the switching slider 51 is driven to move upwards, the driving friction wheel 53 is driven by the switching main shaft 52 to move upwards to just abut against the rotating friction wheel 33, the vibrating friction wheel 34 is separated from the driving friction wheel 53 at the moment, the rotary drum 19 stops vibrating at the moment, and the driving friction wheel 53 drives the auxiliary bevel gear shaft 31 to rotate, thereby driving the auxiliary bevel gear 30 to rotate, the auxiliary bevel gear 30 drives the main bevel gear 43 to rotate through the main bevel gear 43, thereby driving the main spline shaft 61 to rotate against the elastic force of the torsion spring 44, so that the main spline shaft 61 drives the rotary drum 19 to rotate through the rotary main shaft 24, and when the limiting magnetic block 25 is separated from the fine sand limiting groove 65, the switching knob 46 is loosened, and at this time, the limiting magnetic block 25 gradually approaches the medium sand limiting groove 63 and gradually separates from the coarse sand limiting groove 64; when the rotary drum 19 rotates until the limiting magnetic blocks 25 correspond to the medium sand limiting grooves 63, the limiting magnetic blocks 25 move left into the driving friction wheel 53 at the moment so as to be separated from the small magnetic blocks 66, the switching slide block 51 drives the driving friction wheel 53 to move downwards through the switching main shaft 52 to be abutted against the vibrating friction wheel 34, the rotary drum 19 continuously vibrates, the building sand is filtered through the medium filter screen 22 at the moment, medium sand is obtained, and coarse sand is left in the filter cavity 18 after the filtering is finished; if the coarse sand in the filter chamber 18 is to be taken out, the motor 41 is turned off, and the switching knob 46 is turned at the same time, so that when the limiting magnetic block 25 is disengaged from the middle sand limiting groove 63, the elastic force of the torsion spring 44 drives the rotary main shaft 24 to rotate through the main spline shaft 61, thereby driving the rotary drum 19 to return to the initial state, and then the motor is turned reversely, thereby the rotary drum 19 is turned reversely, and when the limiting magnetic block 25 is disengaged from the fine sand limiting groove 65, the limiting magnetic block 25 is released from the switching knob 46, at the same time, the limiting magnetic block 25 gradually approaches the coarse sand limiting groove 64, and when the coarse sand limiting groove 64 corresponds to the limiting magnetic block 25, at the same time, the coarse sand outlet 55 just corresponds to the lower through hole 59, thereby the coarse sand drops out from the filter chamber 18 to the outside through the coarse sand outlet 55 and the sand outlet 58 along with the vibration effect, thereby obtaining the coarse sand by the device, and when the sand discharge is only, at this time, the apparatus returns to the initial state by the elastic force of the torsion spring 44.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a can freely switch sand filter equipment for building of filtration mode, includes the main part case, its characterized in that: a rotary drum cavity is arranged in the main body box, a sand outlet with a downward opening is communicated with the lower end wall of the rotary drum cavity, a bevel gear cavity positioned on the right side of the rotary drum cavity is arranged in the main body box, a main spline shaft which extends leftwards into the rotary drum cavity and rightwards into the bevel gear cavity is connected in a rotationally matched manner with the left end wall of the bevel gear cavity, an auxiliary spline shaft which extends rightwards into the rotary drum cavity and corresponds to the main spline shaft is connected in a rotationally matched manner with the left end wall of the rotary drum cavity, a rotary main shaft which extends leftwards into the auxiliary spline shaft and is connected with the auxiliary spline shaft in a splined manner is connected in a rotationally matched manner with the inner spline of the main spline shaft, a rotary drum fixedly connected with the rotary main shaft is arranged in the rotary drum cavity, a spring fixing disc positioned on the left side of the rotary drum is connected in a rotationally matched manner with the auxiliary spline shaft, and, be equipped with the filter chamber in the rotary drum, filter chamber left end wall intercommunication is equipped with the opening and just is located left the lower opening of rotatory main shaft downside, filter chamber left end wall intercommunication is equipped with the opening and just is located left the last opening of rotatory main shaft upside, main part case left end face fixedly connected with sand inlet box, be equipped with the ascending sand inlet chamber of opening in the sand inlet box, rotary drum chamber left end wall fixedly connected with the linking piece that sand inlet box corresponds, sand inlet chamber right-hand member wall intercommunication is equipped with and extends to right linking piece in and the opening right just can with down the opening with the sand passageway that goes up the opening and correspond.

2. The filtering mode freely switchable architectural sand filtering apparatus according to claim 1, wherein: the end of the left side and the right side of the lower end surface of the main box is fixedly connected with supporting blocks which are bilaterally symmetrical, the right end wall of the rotary cylinder cavity is communicated and provided with a cam push rod cavity, the right end wall of the cam push rod cavity is communicated and provided with a cam cavity, the upper side of the cam cavity is provided with a friction wheel cavity, the upper end wall of the friction wheel cavity is communicated and provided with a switching slide block cavity positioned on the right side of the bevel gear cavity, the upper side of the switching slide block cavity is provided with a wire wheel cavity positioned on the right side of the bevel gear cavity, the right side of the cam cavity is provided with a motor fixedly connected with the main box, the rotary cylinder is internally provided with a fine sand limiting groove with a right opening and positioned on the upper side of the rotary main shaft, the rotary cylinder is internally provided with a coarse sand limiting groove with a right opening and positioned on the rear side of the rotary, the limiting device comprises a limiting magnetic block cavity, a small magnetic block cavity is communicated with the tail end of the right side of the upper end wall of the limiting magnetic block cavity, the small magnetic block cavity is connected with a small magnetic block in a sliding fit mode, the limiting magnetic block cavity is connected with a limiting magnetic block which can correspond to the fine sand limiting groove, the coarse sand limiting groove, the medium sand limiting groove and the small magnetic block in a sliding fit mode, and a limiting spring is fixedly connected between the right end face of the limiting magnetic block and the right end wall of the limiting magnetic block cavity.

3. The filtering mode freely switchable architectural sand filtering apparatus according to claim 1, wherein: a main bevel gear fixedly connected with the main spline shaft is arranged in the bevel gear cavity, an auxiliary bevel gear shaft which extends downwards into the friction gear cavity and extends upwards into the bevel gear cavity is connected on the lower end wall of the bevel gear cavity in a rotating fit manner, an auxiliary bevel gear fixedly connected with the auxiliary bevel gear shaft is connected on the lower side of the main bevel gear in a power fit manner, a torsion spring is fixedly connected between the right end surface of the main spline shaft and the right end wall of the bevel gear cavity, a rotating friction wheel fixedly connected with the auxiliary bevel gear shaft is arranged in the friction gear cavity, a cam shaft which extends downwards into the cam cavity and extends upwards into the friction gear cavity and is positioned on the lower side of the auxiliary bevel gear shaft is connected on the lower end wall of the friction gear cavity in a rotating fit manner, and a vibrating friction wheel which is fixedly connected with the cam shaft and corresponds to the rotating friction wheel is arranged, the cam cavity is internally provided with a cam fixedly connected with the cam shaft, the left end face of the cam is abutted with a cam push block connected with the cam cavity in a sliding fit manner, the left end face of the cam push block is fixedly connected with a cam push rod which extends leftwards to penetrate through the cam push rod cavity into the rotary drum cavity and is abutted with the rotary drum cavity, and a cam spring is fixedly connected between the left end face of the cam push block and the left end wall of the cam cavity.

4. The filtering mode freely switchable architectural sand filtering apparatus according to claim 2, wherein: a switching slide block is connected in the switching slide block cavity in a sliding fit manner, a switching slide block spring is fixedly connected between the upper end surface of the switching slide block and the upper end wall of the switching slide block cavity, a motor spline shaft which extends upwards into the friction wheel cavity and is connected with the main body box in a rotating fit manner is fixedly connected on the upper end surface of the motor, a switching main shaft which extends upwards through the friction wheel cavity to the switching slide block cavity and is connected with the switching slide block in a rotating fit manner is connected in a spline fit manner in the motor spline shaft, a driving friction wheel which is abutted against the vibrating friction wheel and can be abutted against the rotating friction wheel is fixedly connected on the switching main shaft, a line wheel shaft which extends to the outside rightwards and extends to the inside of the line wheel cavity leftwards is connected in a rotating fit manner on the right end wall of the line wheel, and the right end face of the line shaft is fixedly connected with a switching knob located outside.

5. The filtering mode freely switchable architectural sand filtering apparatus according to claim 1, wherein: the filter chamber lower end wall intercommunication be equipped with the opening downwards and can with go out the fine filter screen chamber that the sand mouth corresponds, fine filter screen intracavity fixedly connected with fine filter screen, filter chamber upper end wall intercommunication be equipped with the opening upwards and can with go out the well filter screen chamber that the sand mouth corresponds, well filter screen intracavity fixedly connected with well filter screen, filter chamber front end wall intercommunication be equipped with the opening forward and can with go out the coarse sand export that the sand mouth corresponds, spacing magnetic path right-hand member face with fixedly connected with line wheel stay cord between the line wheel, little magnetic path up end with fixedly connected with switches the stay cord between the switching slider up end, spacing magnetic path with appeal between the little magnetic path is greater than the thrust of switching the slider spring.