CN222000717U - Sand and stone separator - Google Patents

Abstract

The application relates to the technical field of sand and stone separation, and particularly discloses a sand and stone separator which comprises a shell, a separating screen, a vibrating device and a water spraying device, wherein the separating screen is arranged on the shell, the top of the shell is provided with an opening, the separating screen is arranged in an inner cavity at the top of the shell, a drain pipe is arranged at the bottom of the shell, the vibrating device is used for driving the separating screen to vibrate, the water spraying device is used for spraying water towards the upper surface of the separating screen, a fixed plate is rotationally connected on the inner side wall of the shell, the rotation axis of the fixed plate is transversely distributed on the fixed plate, a plurality of inserting rods are uniformly distributed on the fixed plate and are used for rotating into sieve holes of the separating screen, and a driving device for driving the fixed plate to rotate is arranged on the shell. The application has the effect of improving the problems caused by the blocking of the sieve holes on the separating sieve.

Description

Sand and stone separator

Technical Field

The application relates to the technical field of sand and stone separation, in particular to a sand and stone separator.

Background

The sand-stone separator is also called as concrete sand-stone separation slurry water recovery equipment, is core equipment of a concrete recovery system, and is mainly used for cleaning a mixer truck for circulation of a concrete mixing plant and separating, collecting and recycling sand, stone, slurry and the like in concrete waste. The sand-stone separator can not only improve the pollution problem of concrete, but also save precious building resources economically and reasonably.

In the related art, a sand-stone separator is proposed, including casing, separation sieve and vibrating device, the separation sieve sets up in the inner chamber at casing top, and vibrating device is used for driving the separation sieve vibration, and separation casing bottom is equipped with the outlet. When the sand and stone separating device is used, sand and stone to be separated are poured onto the separating screen in the separating shell, water is sprayed to the sand and stone through the water pipe to clean the sand and stone, and meanwhile, the vibrating device is started to enable the separating screen to vibrate, so that fine sand grains and the like in the sand and stone are screened and fall into the bottom of the separating shell, and flow out along with water flow from the water outlet, and larger stones are left on the separating screen, so that the sand, stone, slurry and the like are separated, collected and reused.

With the related art, after the separating screen is used for a long time, the screen holes on the separating screen are easy to be blocked, so that the screening function of the separating screen is reduced, and further, the separating effect of the sand-stone separator is poor, and the separating efficiency is low.

Disclosure of utility model

In order to solve the problem caused by blocking of sieve holes on a separating screen, the application provides a sand-stone separator.

The application provides a sand-stone separator which adopts the following technical scheme:

The utility model provides a sand and stone separator, includes the casing and locates separation sieve, vibrating device and water jet equipment on the casing, casing open-top, the separation sieve is located in the casing top inner chamber, the casing bottom is equipped with the drain pipe, vibrating device is used for driving the separation sieve vibration, water jet equipment is used for spraying water towards the separation sieve upper surface, rotate on the casing inside wall and be connected with the fixed plate, the axis of rotation of fixed plate is along transversely, the equipartition has a plurality of inserted bars on the fixed plate, the inserted bar is arranged in inserting the sieve mesh of separation sieve, be equipped with on the casing and be used for driving fixed plate pivoted drive arrangement.

By adopting the technical scheme, when the sand-stone separator is used, sand-stone to be separated is placed on the separating screen in the shell, the water spraying device sprays water to the sand-stone on the separating screen, the vibrating device is started to drive the separating screen to vibrate, larger stone blocks in the sand-stone to be separated are left on the separating screen, fine sand grains and the like in the sand-stone to be separated fall on the bottom wall of the shell through the sieve holes of the separating screen, and finally are discharged from the drain pipe along with water flow; after the sieve pore of separating screen is plugged up, only need rotate through drive arrangement drive fixed plate for insert the pole on the fixed plate and insert in the sieve pore of separating screen, thereby link up the sieve pore of separating screen, improved the sieve pore on the separating screen and plugged up the problem that brings, and simple structure, convenient to use.

Optionally, the vibrating device comprises a rotating motor, a cam and an elastic piece, a chute penetrating through the inner cavity of the shell is formed in the side wall of the shell, the separating screen is slidably clamped in the chute, and at least part of the separating screen extends out of the chute; the elastic piece is arranged in the chute, one end of the elastic piece is abutted against the inner wall of the chute, and the other end of the elastic piece is abutted against the end face of the separating screen in the chute; the rotary motor is arranged on the shell, the cam is connected to the rotary shaft of the rotary motor, and the peripheral wall of the cam is abutted with the side wall of the separating screen extending out of the chute.

By adopting the technical scheme, the rotating motor is started to drive the cam to rotate continuously, so that the separating screen is impacted continuously, and the elastic piece is arranged in the chute, so that the separating screen can vibrate continuously, and the functional requirement that the vibrating device drives the separating screen to vibrate is met; the rotating motor is used as a standard component, so that the manufacturing cost is low and the cost is saved.

Optionally, the drive arrangement includes driven gear and sector gear, sector gear coaxial coupling is in the axis of rotation of rotating motor, the fixed plate top is rotated through the bull stick and is connected on the casing inside wall, driven gear coaxial slip cap is established on the bull stick, driven gear can with sector gear meshing, be equipped with on the driven gear be used for with driven gear lock in with the locking component of sector gear meshing state.

By adopting the technical scheme, the position of the driven gear on the rotating rod is adjusted to enable the driven gear to be meshed with the sector gear, then the position of the driven gear is locked through the locking component, the rotating motor is started to drive the sector gear to rotate to drive the driven gear to rotate, so that the fixed plate is driven to rotate upwards around the connecting rod, the functional requirement of the driving device for driving the fixed plate to rotate is met, and the inserted rod is inserted into the sieve holes of the separating sieve at the moment; when the sector gear rotates to be no longer meshed with the driven gear, the fixed plate automatically sags under the action of gravity, when the sector gear is meshed with the driven gear again along with the rotation, the driven gear is driven by the sector gear to rotate upwards again, and the inserted link is inserted into the sieve holes of the separating sieve again, so that the operation is circulated, the inserted link is repeatedly inserted into the sieve holes of the separating sieve for a plurality of times, and the blocked sieve holes of the separating sieve are opened, so that the structure is ingenious and the use is convenient; and the power source is shared with the rotating motor, so that the cost is saved.

Optionally, the locking subassembly includes the locking lever, the spacing groove has been seted up along bull stick length direction on the bull stick, locking lever threaded connection is on driven gear, the locking lever can screw in the spacing inslot, with spacing groove diapire butt.

By adopting the technical scheme, the locking rod and the limiting groove are matched, so that the driven gear and the rotating rod can be locked only by screwing the locking rod into the limiting groove and propping against the bottom wall of the limiting groove, and the structure is simple and practical; when the position of the driven gear is required to be adjusted so that the driven gear is not meshed with the sector gear, the locking rod is only required to be unscrewed, then the driven gear is slid along the length direction of the rotating rod, and then the driven gear is locked.

Optionally, the separating screen is obliquely arranged, the shell is rotationally connected with a material conveying roller, a plurality of scraping plates are arranged on the peripheral wall of the material conveying roller around the axis of the material conveying roller, and the material conveying roller is arranged above the lower end of the separating screen; the shell is provided with a power component for driving the material conveying roller to rotate.

By adopting the technical scheme, the separating screen is obliquely arranged, so that the sand and stones with larger particles remained on the separating screen can be gathered at the lower end of the separating screen, and the cleaning and the transportation are convenient; the power assembly drives the material conveying roller to rotate to drive the scraping plate to rotate, so that sand and stones accumulated at the lower end of the separating screen can be pushed out by the scraping plate, and the material conveying device is convenient to convey and saves time and labor.

Optionally, the power component includes first synchronizing wheel, second synchronizing wheel and hold-in range, first synchronizing wheel coaxial coupling is on the axis of rotation of rotating motor, second synchronizing wheel and defeated material roller coaxial coupling, the hold-in range is around establishing on first synchronizing wheel and second synchronizing wheel jointly.

Through adopting above-mentioned technical scheme, first synchronizing wheel, second synchronizing wheel and hold-in range and setting for can drive the material conveying roller through rotating the motor and rotate, need not additionally set up the power supply, practice thrift the cost.

Optionally, the drain pipe tip is equipped with the filter screen board, be equipped with automatic dirt subassembly on the filter screen board.

By adopting the technical scheme, the filter screen plate can isolate sundries and the like in water outside the drain pipe, so that the risk of blockage in the drain pipe is reduced; the automatic dirt cleaning assembly is arranged to clean the filter screen plate, so that the risk that the filter screen plate is blocked by sludge is reduced.

Optionally, automatic subassembly of decontaminating includes dwang, impeller and brush, the dwang rotates to be connected on the filter screen plate, the impeller is located the dwang and is kept away from filter screen plate one end, the brush is located on the dwang, brush and filter screen plate terminal surface butt.

By adopting the technical scheme, when water in the inner cavity of the bottom of the shell is discharged, the impeller is driven to rotate under the action of water flow to drive the rotating rod to rotate, so that the hairbrush is driven to rotate to brush the end face of the filter screen plate, and the blocking probability of the filter screen plate is reduced; the water flow is used as power, the structure is simple, and the use is convenient.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The fixed plate, the inserted link and the driving device are arranged, so that when the separating screen is blocked, the fixed plate is driven to rotate only through the driving device, and the inserted link on the fixed plate is inserted into the screen holes of the separating screen along with rotation, so that the blocked screen holes of the separating screen are opened, and the separating screen is simple in structure and convenient to use;

2. Driven gear, sector gear and locking component's setting for adjust driven gear's position on the bull stick, make driven gear and sector gear meshing, then through locking component locking driven gear's position, start rotation motor can drive the fixed plate and upwards rotate, when sector gear rotates to no longer with driven gear meshing, the fixed plate sags under self action of gravity, and after sector gear rotates again to meshing with driven gear, the fixed plate is carried upwards again and rotates in proper order the cyclic operation, make the inserted link constantly insert in the sieve mesh of separating screen repeatedly, realize getting through to the shutoff sieve mesh of separating screen.

3. The first synchronous wheel, the second synchronous wheel and the synchronous belt are arranged, so that the material conveying roller can synchronously rotate along with the starting of the rotating motor, and larger stones reserved above the separating screen are conveyed out, and the material conveying is convenient, time-saving and labor-saving; and by utilizing the power source of the rotating motor, the cost of the sand-stone separator is saved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic overall structure of an embodiment of the present application;

FIG. 2 is a schematic view showing the overall structure of the fixing plate in a vertical state after the casing is cut in the embodiment of the present application;

fig. 3 is a schematic view showing the overall structure of the fixing plate in an upward rotated state after the housing is cut in the embodiment of the present application.

Reference numerals: 1. a housing; 11. a chute; 2. a separation sieve; 3. a vibration device; 31. a rotating motor; 32. a cam; 33. an elastic member; 4. a water spraying device; 41. connecting a water pipe; 42. a spray head; 5. a discharging device; 51. a feed roller; 52. a shaft lever; 53. a scraper; 54. a first synchronizing wheel; 55. a second synchronizing wheel; 56. a synchronous belt; 6. a drain pipe; 61. a valve; 62. a filter screen plate; 63. a rotating lever; 64. an impeller; 65. a brush; 7. a fixing plate; 71. a rotating rod; 711. a limit groove; 72. a rod; 8. a driving device; 81. a driven gear; 811. a locking sleeve; 82. a sector gear; 83. a locking lever.

Detailed Description

The application is described in further detail below with reference to fig. 1-3.

The embodiment of the application discloses a sand-stone separator. Referring to fig. 1, the sand-stone separator comprises a housing 1, a separating screen 2, a vibrating device 3, a water spraying device 4 and a discharging device 5, wherein the top of the housing 1 is opened, the separating screen 2 is arranged in an inner cavity at the top of the housing 1, and sand-stone to be separated is placed on the upper surface of the separating screen 2; the vibrating device 3 is arranged on the shell 1 and is used for driving the separating screen 2 to vibrate, so that sand and stones placed on the upper surface of the separating screen 2 are separated through vibration of the separating screen 2, larger stones and the like remain on the upper surface of the separating screen 2, and smaller sand grains and the like fall into an inner cavity at the bottom of the shell 1 through sieve holes of the separating screen 2. The water spraying device 4 is arranged at the top of the shell 1, the water spraying device 4 comprises a connecting water pipe 41 and a plurality of spray heads 42 arranged on the connecting water pipe 41, the connecting water pipe 41 is used for connecting an external water source, and the spray heads 42 face the upper surface of the separating screen 2. The discharging device 5 is arranged on the shell 1, and the discharging device 5 is used for pushing out larger stones and the like remained on the upper surface of the separating screen 2. A drain pipe 6 is connected to one side of the bottom of the casing 1, a valve 61 is provided on the drain pipe 6, and the drain pipe 6 is used for discharging water flow with sand grains and the like in the casing 1.

Referring to fig. 2, the vibration device 3 includes a rotation motor 31, a cam 32 and an elastic member 33, a chute 11 penetrating through the inner cavity of the housing 1 is formed on the outer sidewall of the housing 1, the chute 11 is inclined, the height of the chute 11 at the notch is smaller than the height of the chute 11 at the bottom of the chute, the inclination angle is set to be 3 ° to 10 °, and 5 ° is selected in the present application. The separating screen 2 is clamped in the chute 11 in a sliding way, and at least part of the separating screen 2 is positioned outside the chute 11; the elastic member 33 is disposed in the chute 11 and is sandwiched between the separating screen 2 and the bottom of the chute 11, that is, one end of the elastic member 33 abuts against the bottom of the chute 11, the other end of the elastic member 33 abuts against the end surface of the separating screen 2 inserted into the chute 11, and the elastic member 33 is illustratively a compression spring. The rotating motor 31 is fixed on the outer wall of the shell 1 in a bolting way, the length direction of a rotating shaft of the rotating motor 31 is the same as the width direction of the shell 1, the rotating motor 31 is positioned at a notch of the chute 11, the cam 32 is fixed on the rotating shaft of the rotating motor 31 in a coaxial welding way, and the outer peripheral wall of the cam 32 is abutted with one end of the separating screen 2 positioned outside the chute 11. The rotating motor 31 is started to work to drive the cam 32 to rotate, so that the cam 32 continuously collides with the separating screen 2, and the separating screen 2 moves back and forth along the extending direction of the chute 11 under the cooperation of the elastic piece 33 in the chute 11, so that sand and gravel are screened; the stones with larger volumes in the sand and stone are reserved on the upper surface of the separating screen 2 and are gathered on the upper surface of the lower end of the separating screen 2 along with the action of gravity, and sand grains with smaller volumes in the sand and stone fall into the inner cavity at the bottom of the shell 1 through the sieve holes of the separating screen 2.

The discharging device 5 comprises a feeding roller 51, the feeding roller 51 is rotationally connected to the top of the shell 1 through a shaft lever 52, the length direction of the shaft lever 52 is the same as the width direction of the shell 1, the feeding roller 51 is located above the upper surface of the lower end of the separating screen 2, a plurality of scraping plates 53 are uniformly distributed on the peripheral wall of the feeding roller 51 around the shaft lever 52, the scraping plates 53 are close to the upper surface of the separating screen 2, and a power component for driving the feeding roller 51 to rotate is arranged on the shell 1. When the separating screen is used, the power assembly drives the material conveying roller to rotate, and the scraping plate 53 is driven to rotate, so that stones and the like accumulated on the upper surface of the lower end of the separating screen 2 are transported away, and the stones and the like remained on the separating screen 2 are cleaned conveniently and rapidly in real time, and the separating screen is convenient to use.

The power assembly illustratively includes a first synchronizing wheel 54, a second synchronizing wheel 55, and a timing belt 56, wherein the first synchronizing wheel 54 is coaxially fixed on the rotating shaft of the rotating motor 31, the second synchronizing wheel 55 is coaxially fixed on the shaft 52, and the timing belt 56 is commonly wound around the first synchronizing wheel 54 and the second synchronizing wheel 55. The rotating motor 31 is driven to drive the first synchronous wheel 54 to rotate, and the second synchronous wheel 55 is driven to rotate through the synchronous belt 56, so that the material conveying roller 51 is driven to rotate. By sharing a power source with the rotary motor 31, cost is saved and the cost is reduced.

In addition, since the screen holes are easily blocked after the separating screen 2 is used for a long time, the separating ability of the separating screen 2 is lowered, thereby affecting the use effect of the sand-stone separator. To this, rotate on the casing 1 inside wall and be connected with fixed plate 7, fixed plate 7 top is rotated through bull stick 71 and is connected on casing 1 inside wall, bull stick 71 is located the one side that is close to the notch of spout 11 in the casing 1 length direction, the length direction of bull stick 71 is the same with casing 1 width direction, the fixed plate 7 keep away from the lateral wall of the notch of spout 11 can rotate to with separation sieve 2 diapire butt, evenly arranged a plurality of inserted bars 72 on the fixed plate 7 keep away from the lateral wall of the notch of spout 11, the position of inserted bar 72 corresponds with the position of the sieve mesh of separation sieve 2, be equipped with on the casing 1 and be used for driving fixed plate 7 pivoted drive arrangement 8 upwards. When in use, the fixing plate 7 is driven by the driving device 8 to rotate upwards to be abutted with the bottom wall of the separating screen 2, and the inserted rod 72 on the fixing plate 7 is inserted into the screen holes of the blocked separating screen 2, so that the screen holes of the separating screen 2 are opened, and the separating screen is simple in structure and convenient to use.

The driving device 8 includes a driven gear 81 and a sector gear 82, the sector gear 82 is fixed on the rotation shaft of the rotation motor 31 by coaxial welding, the driven gear 81 is coaxially sleeved on the rotation rod 71, the driven gear 81 can slide along the length direction of the rotation rod 71, the driven gear 81 can slide to a position meshed with the sector gear 82, and a locking component for locking the driven gear 81 is arranged on the rotation rod 71.

When the fixed plate 7 needs to be rotated, the position of the driven gear 81 is adjusted until the driven gear 81 is meshed with the sector gear 82, then the position of the driven gear 81 is locked through the locking assembly, then the rotating motor 31 is started to drive the sector gear 82 to rotate and drive the slave gear to rotate, so that the fixed plate 7 is driven to rotate upwards to be abutted with the bottom wall of the separating screen 2, and the inserted rod 72 on the fixed plate 7 is inserted into the sieve holes of the separating screen 2 to open the blocked sieve holes on the separating screen 2; after the sector gear 82 rotates to be no longer meshed with the driven gear 81, the fixed plate 7 rotates to naturally sag under the action of self gravity, when the sector gear 82 rotates along with the rotation shaft of the rotating motor 31 and is meshed with the driven gear 81 again, the sector gear 82 drives the driven gear 81 to rotate upwards again, and accordingly the circulation operation is carried out, the inserted link 72 can be circularly inserted into the sieve holes of the separating sieve 2 for a plurality of times, and the opening effect of the sieve holes of the separating sieve 2 is improved. When the fixed plate 7 is not required to be driven to rotate, the driven gear 81 is only required to be locked at a position not engaged with the sector gear 82 by the locking assembly, and the rotation of the sector gear 82 no longer drives the driven gear 81 to move.

The locking assembly comprises a locking rod 83, the locking rod 83 is an exemplary locking bolt, a driven gear 81 is coaxially welded and fixed with a locking sleeve 811, the locking rod 83 is in threaded connection with the locking sleeve 811, the locking rod 83 can be screwed into an inner cavity of the locking sleeve 811, a limiting groove 711 is formed in the rotating rod 71 along the length direction of the locking rod, the width of the limiting groove 711 is the same as the diameter of a threaded end of the locking rod 83, the locking rod 83 can be screwed into the limiting groove 711 and is abutted with the bottom wall of the limiting groove 711, so that the rotating rod 71 is abutted against the inner wall of the locking sleeve 811, and then the positions of the driven gear 81 and the rotating rod 71 are locked; the structure is simple, and the locking is firm.

In addition, in order to prevent the drain pipe 6 from being blocked, a filter screen plate 62 is provided in an inner cavity of one end of the drain pipe 6 inserted into the inner cavity of the housing 1, and the filter screen plate 62 is used for isolating impurities in water from the drain pipe 6. Further, in order to prevent the meshes of the filter screen plate 62 from being blocked, the filter screen plate 62 is further provided with an automatic dirt cleaning assembly, the automatic dirt cleaning assembly comprises a rotating rod 63, an impeller 64 and a brush 65, the rotating rod 63 is coaxially and rotatably connected to the filter screen plate 62, the impeller 64 is fixedly welded at one end of the rotating rod 63 far away from the filter screen plate 62, and the impeller 64 is driven to rotate by water along with the water flowing out of the drain pipe 6; the hairbrush 65 is fixedly connected to the rotating rod 63, and the hairbrush 65 is abutted against the end face of the filter screen plate 62. The impeller 64 rotates to drive the rotating rod 63 to rotate, so that the hairbrush 65 is driven to rotate to clean impurities on the filter screen plate 62, and the risk of the filter screen plate 62 being blocked is reduced.

The implementation principle of the sand-stone separator in the embodiment of the application is as follows: when the sand and stone separating device is used, sand and stone to be separated are placed on the separating screen 2, water is sprayed onto the upper surface of the separating screen 2 through the spray nozzle 42, meanwhile, the rotating motor 31 is started, the cam 32 is driven to rotate to continuously collide with one end of the separating screen 2, which extends out of the chute 11, the separating screen 2 continuously vibrates under the cooperation of the elastic piece 33, so that sand and stone with smaller volume in the sand and stone and the like fall on the bottom of the inner cavity of the shell 1 through the sieve holes of the separating screen 2, and stone and the like with larger volume in the sand and stone are reserved on the upper surface of the separating screen 2. The feeding roller 51 is driven to rotate by the transmission of the first synchronizing wheel 54, the second synchronizing wheel 55 and the timing belt 56, so that stones and the like accumulated on the upper surface of the lower end of the separation screen 2 are carried away by the feeding roller 51. When the housing 1 stores enough sewage doped with sand, the valve 61 on the drain pipe 6 is opened, and water flow is discharged through the drain pipe 6, so that sand and stone separation is realized. After the sieve mesh on the separating screen 2 is plugged, the position of the driven gear 81 is adjusted so that the driven gear 81 is meshed with the sector gear 82, the driven gear 81 is locked through the locking rod 83, the rotating motor 31 is started to work, the sector gear 82 is driven to rotate, the driven gear 81 is driven to rotate, the fixing plate 7 is driven to rotate upwards, the inserted link 72 arranged on the fixing plate 7 is inserted into the sieve mesh of the separating screen 2, and the sieve mesh is opened.

The foregoing are all optional embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. The utility model provides a sand and stone separator, includes casing (1) and locates separation sieve (2), vibrating device (3) and water jet equipment (4) on casing (1), casing (1) open-top, in casing (1) top inner chamber was located to separation sieve (2), casing (1) bottom is equipped with drain pipe (6), vibrating device (3) are used for driving separation sieve (2) vibration, water jet equipment (4) are used for spraying water towards separation sieve (2) upper surface, its characterized in that: the utility model discloses a separating screen, including casing (1), fixed plate (7) are connected with in the rotation on casing (1) inside wall, the axis of rotation of fixed plate (7) is along transversely, a plurality of inserted bars (72) are evenly distributed on fixed plate (7), inserted bars (72) are arranged in inserting the sieve mesh of separating screen (2), be equipped with on casing (1) and be used for driving fixed plate (7) pivoted drive arrangement (8).

2. A sand and stone separator according to claim 1, wherein: the vibrating device (3) comprises a rotating motor (31), a cam (32) and an elastic piece (33), a chute (11) penetrating through the inner cavity of the shell (1) is formed in the side wall of the shell (1), the separating screen (2) is slidably clamped in the chute (11), and at least part of the separating screen (2) extends out of the chute (11); the elastic piece (33) is arranged in the chute (11), one end of the elastic piece (33) is abutted against the inner wall of the chute (11), and the other end of the elastic piece (33) is abutted against the end face of the separating screen (2) positioned in the chute (11); the rotary motor (31) is arranged on the shell (1), the cam (32) is connected to the rotary shaft of the rotary motor (31), and the peripheral wall of the cam (32) is abutted with the side wall of the separating screen (2) extending out of the sliding groove (11).

3. A sand and stone separator according to claim 2, characterized in that: the driving device (8) comprises a driven gear (81) and a sector gear (82), the sector gear (82) is coaxially connected to a rotating shaft of the rotating motor (31), the top of the fixed plate (7) is rotationally connected to the inner side wall of the shell (1) through a rotating rod (71), the driven gear (81) is coaxially sleeved on the rotating rod (71) in a sliding mode, the driven gear (81) can be meshed with the sector gear (82), and a locking assembly used for locking the driven gear (81) in a meshing state with the sector gear (82) is arranged on the driven gear (81).

4. A sand and stone separator according to claim 3, wherein: the locking assembly comprises a locking rod (83), a limiting groove (711) is formed in the rotating rod (71) along the length direction of the rotating rod (71), the locking rod (83) is connected to the driven gear (81) in a threaded mode, and the locking rod (83) can be screwed into the limiting groove (711) and is abutted to the bottom wall of the limiting groove (711).

5. A sand and stone separator according to claim 2, characterized in that: the separating screen (2) is obliquely arranged, the shell (1) is rotationally connected with a material conveying roller (51), a plurality of scraping plates (53) are arranged on the peripheral wall of the material conveying roller (51) around the axis of the material conveying roller (51), and the material conveying roller (51) is arranged above the lower end of the separating screen (2); the shell (1) is provided with a power component for driving the material conveying roller (51) to rotate.

6. The sand separator of claim 5, wherein: the power assembly comprises a first synchronous wheel (54), a second synchronous wheel (55) and a synchronous belt (56), wherein the first synchronous wheel (54) is coaxially connected to a rotating shaft of a rotating motor (31), the second synchronous wheel (55) is coaxially connected with a material conveying roller (51), and the synchronous belt (56) is commonly wound on the first synchronous wheel (54) and the second synchronous wheel (55).

7. A sand and stone separator according to claim 1, wherein: the end part of the drain pipe (6) is provided with a filter screen plate (62), and the filter screen plate (62) is provided with an automatic dirt cleaning component.

8. The sand separator as claimed in claim 7, wherein: the automatic dirt cleaning assembly comprises a rotating rod (63), an impeller (64) and a brush (65), wherein the rotating rod (63) is rotationally connected to the filter screen plate (62), the impeller (64) is arranged at one end, far away from the filter screen plate (62), of the rotating rod (63), the brush (65) is arranged on the rotating rod (63), and the brush (65) is in butt joint with the end face of the filter screen plate (62).