Sand screening machine for constructional engineering

Abstract

The utility model discloses a sand screening machine for constructional engineering. The sand screening machine comprises a shell, a sand storage box connected to a top plate of the shell, an intermittent quantitative discharging mechanism, a vibration screening mechanism and a driving mechanism connected to the outer wall of the shell, wherein the intermittent quantitative discharging mechanism and the vibration screening mechanism are arranged in the shell. And a discharging opening penetrating through the top plate of the shell and the sand storage box is formed in the joint of the top plate of the shell and the sand storage box. The feeding end of the intermittent quantitative discharging mechanism communicates with the discharging opening, the power input end of the intermittent quantitative discharging mechanism is connected with the driving mechanism so as to intermittently rotate in the circumferential direction under the action of the driving mechanism, and then quantitative sand materials are intermittently discharged into the vibration screening mechanism below. The shell is provided with a first discharging port and a second discharging port which communicate with the two discharging ends of the vibration screening mechanism correspondingly, and the vibration screening mechanism is used for conducting vibration screening on sand falling into the vibration screening mechanism so that miscellaneous materials and qualified materials can be discharged from the first discharging port and the second discharging port correspondingly. According to the novel sand screening machine, the sand screening efficiency and the sand screening quality can be improved, and the maintenance and repair workload is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sand screening machines, in particular to a sand screening machine for construction engineering. Background Art

[0002] The sand screening machine commonly used in construction projects is a kind of equipment used to screen materials such as sand, gravel, etc. Its main function is to screen impurities and particles of different particle sizes in the raw materials to obtain granular materials that meet the requirements. The sand screening machine is usually composed of components such as vibrating screens and rotary screens. Through different screen hole sizes and screen materials, materials of different particle sizes can be screened and graded.

[0003] Chinese patent document CN216606111U discloses a sand screening machine for construction projects, including a working box, a supporting base plate fixedly connected to the bottom end of the working box, a supporting column fixedly connected to the bottom edge of the supporting base plate, and an impurity discharge port fixedly connected to the front surface of the working box. The utility model is convenient for driving the driving wheel to rotate through the output motor, and driving the driven wheel and the connecting extrusion rod to rotate through the transmission belt, and squeezing one end of the connecting active rod through the rotation of the connecting extrusion rod, so that the connecting active rod can be deflected on the outside of the surface of the second fixed positioning rod, so that the other end of the connecting active rod drives the striking hammer to move, and strikes the surface of the vibrating screen plate, thereby cleaning the outside of the surface of the vibrating screen plate.

[0004] Although the sand screening machine in the above patent document can screen sand during use, it cannot screen sand quantitatively, so it is easy to cause excessive sand discharge during the screening process, resulting in clogging of the screen. Utility Model Content

[0005] The utility model provides a sand screening machine for construction engineering, so as to solve the technical problem that the existing sand screening machine cannot perform quantitative sand screening, so that the sand output is too large and the screen is blocked during the sand screening process.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A sand screening machine for construction engineering comprises: an outer shell, a sand storage box connected to the top plate of the outer shell, an intermittent quantitative feeding mechanism and a vibrating screening mechanism which are spatially arranged in the upper and lower parts of the outer shell, and a driving mechanism connected to the outer wall of the outer shell; a feeding port is provided on the sand storage box for the sand to be screened to enter and be stored therein, and a feeding port which runs through the connection between the top plate of the outer shell and the sand storage box is provided; a feeding end of the intermittent quantitative feeding mechanism is connected to the feeding port, and a power input end of the intermittent quantitative feeding mechanism is connected to the driving mechanism so as to intermittently rotate in the circumferential direction under the action of the driving mechanism, and then intermittently feed quantitative sand into the vibrating screening mechanism below; a first discharge port and a second discharge port which are respectively connected to the two discharge ends of the vibrating screening mechanism are provided on the outer shell, and the vibrating screening mechanism is used for vibrating and screening the sand material which falls therein, so that miscellaneous materials and qualified materials are discharged from the first discharge port and the second discharge port respectively.

[0008] Furthermore, the intermittent quantitative feeding mechanism includes a quantitative feeding component and an intermittent driving component which are arranged to rotate vertically; the feeding end of the quantitative feeding component extends into the feeding port, and the quantitative feeding component is used to temporarily and quantitatively store multiple portions of sand; the power input end of the quantitative feeding component is connected to the intermittent driving component, and the power input end of the intermittent driving component is connected to the driving mechanism, and the intermittent driving component is used to drive the quantitative feeding component to rotate intermittently in the circumferential direction under the action of the driving mechanism, so that the quantitative feeding component can intermittently feed multiple portions of stored quantitative sand into the vibrating screening mechanism.

[0009] Furthermore, the quantitative feeding component includes a first disc and a third disc which are spaced apart and fixed in the upper and lower space, and a rotating drum group which is connected to the output end of the intermittent driving component and rotatably supported on the third disc; the first disc is provided with a feeding hole which passes through the disc surface, and the third disc is provided with a dropping hole which passes through the disc surface, and the dropping hole and the feeding hole are staggered in the circumferential direction; a plurality of storage cavities which are spaced apart and axially penetrated are provided in the circumferential direction of the rotating drum group, and the storage cavities are used to connect the feeding hole and the dropping hole in sequence during the intermittent circumferential rotation of the rotating drum group, so that the quantitative sand material enters the storage cavity through the feeding hole for storage, and then is lowered into the vibrating screening mechanism when the storage cavity is connected to the dropping hole.

[0010] Furthermore, the rotating drum group includes a first rotating rod vertically passing through a third disc, a first bevel gear fixed to the bottom end of the first rotating rod, a second disc supported on the third disc and fixed to the first rotating rod, and a material storage barrel fixed on the second disc at uniform intervals along the circumferential direction; the first bevel gear is used to be connected to the output end of the intermittent drive component; the material storage barrel is a hollow cylinder with two ends connected, and its inner cavity constitutes a material storage chamber, the upper open end of the material storage barrel is used to be connected to the material feed hole, and the opposite lower open end is connected to a through hole correspondingly opened on the second disc, so as to be connected to the blanking hole through the through hole.

[0011] Furthermore, the quantitative feeding assembly also includes a baffle for temporarily closing the bottom opening of the storage barrel, and a weight-increasing block for increasing the weight; the baffle is rotatably arranged at the bottom end of the inner cavity of the storage barrel; the weight-increasing block is fixed to one side of the baffle.

[0012] Furthermore, the intermittent drive component includes a first transmission rod connected to the output end of the driving mechanism, a turntable fixed to the output end of the first transmission rod, a plurality of fixed columns arranged at intervals along the circumference and vertically fixed on the outer end of the turntable, a special-shaped disk arranged close to the outer end of the turntable, a second transmission rod vertically connected to the special-shaped disk, and a second bevel gear fixed to the output end of the second transmission rod; the second bevel gear is meshingly connected to the first bevel gear; the special-shaped disk has a notch on its outer edge, and the fixed column is used to abut against the notch to drive the special-shaped disk to rotate after being rotated by the turntable, and to disengage from the notch after rotating through a set angle, so that the special-shaped disk can rotate intermittently in the circumferential direction, and then the first rotating rod and the second disk are driven to rotate intermittently in the circumferential direction through the meshing of the second bevel gear and the first bevel gear.

[0013] Furthermore, the special-shaped disk is formed by connecting a small semi-circular disk and a large semi-circular disk with unequal radii, and one end of the diameters of the two are flush, and the other ends of the diameters of the two are staggered to form a notch; the number of fixed columns is two, and the two fixed columns are arranged corresponding to the upper and lower ends of the special-shaped disk; the distance from the axis of the second transmission rod to the uppermost point of the protruding part of the special-shaped disk is equal to the distance between the axis of the second transmission rod and the lowest point of the outer surface of the fixed column at the lower end, and the distance between the axis of the second transmission rod and the lowest part of the special-shaped disk is smaller than the distance between the axis of the second transmission rod and the uppermost point of the outer surface of the fixed column at the lower end.

[0014] Furthermore, the intermittent drive assembly also includes two sets of limit sleeve rods, one end of the two sets of limit sleeve rods are respectively sleeved on the outer circle of the first transmission rod and the second transmission rod, and the second ends of the two sets of limit sleeve rods are fixed to the inner wall surface of the shell.

[0015] Furthermore, the driving mechanism includes a fixed plate fixed on the outer wall of the outer shell, and a motor supported on the fixed plate, and the power input end of the intermittent quantitative feeding mechanism is connected to the output shaft of the motor; the sand screening machine for construction projects also includes a stirring mechanism for stirring the sand in the sand storage box, the stirring mechanism includes a stirring blade located in the sand storage box, and a driving component for driving the stirring blade to rotate, and the power input end of the driving component is connected to the output shaft of the motor.

[0016] Furthermore, the vibrating screening mechanism includes a sieve plate and a discharge plate arranged in sequence in the upper and lower parts of the space, and a vibrator connected to the sieve plate; the sieve plate is inclinedly arranged below the intermittent quantitative feeding mechanism, and the downward inclined end of the sieve plate is connected to the first discharge port; the discharge plate is inclinedly arranged, and its downward inclined end is connected to the second discharge port.

[0017] The utility model has the following beneficial effects:

[0018] The sand screening machine of the utility model can perform intermittent quantitative feeding when screening sand through the built-in intermittent quantitative feeding mechanism, thereby avoiding the situation where the vibration screening mechanism is blocked due to excessive material feeding. It not only improves the sand screening efficiency and reduces the maintenance and repair workload, but also because the sand is fed intermittently, it can effectively improve the screening accuracy of the vibration screening mechanism for the sand and improve the sand screening quality.

[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 This is a first overall structural schematic diagram of a sand screening machine according to a preferred embodiment of the utility model;

[0022] Figure 2 This is a second overall structural schematic diagram of the sand screening machine of the preferred embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the overall structure section of the sand screening machine of the utility model;

[0024] Figure 4 for Figure 3 A schematic diagram of the partial cross-sectional structure of the medium quantitative blanking component;

[0025] Figure 5 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0026] Figure 6 for Figure 3 Schematic diagram of the structure of the middle drive mechanism, stirring mechanism and intermittent drive assembly.

[0027] Legend:

[0028] 1. Shell; 101. Feeding port; 102. First discharge port; 103. Second discharge port; 2. Sand storage box; 201. Feeding port; 3. Driving mechanism; 31. Fixed plate; 32. Motor; 4. Stirring mechanism; 41. First pulley; 42. Second rotating rod; 43. Second pulley; 44. Stirring blade; 45. Belt; 5. Intermittent drive assembly; 51. First transmission rod; 52. Rotating plate; 53. Fixed column; 54. Special-shaped disc; 55. Second transmission rod; 56. Second bevel gear; 57. Limit sleeve rod; 6. Support block; 7. Quantitative unloading assembly; 71. First disc; 72. Feeding hole; 73. First rotating rod; 74. Second disc; 75. Storage barrel; 76. Baffle; 77. Third disc; 78. Feeding hole; 79. First bevel gear; 8. Trapezoidal discharge box; 9. Vibrating screening mechanism; 91. Screen plate; 92. Discharge plate. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0030] Reference Figure 1 and Figure 2 The preferred embodiment of the utility model provides a sand screening machine for construction engineering, comprising: a shell 1, a sand storage box 2 connected to the top plate of the shell 1, an intermittent quantitative feeding mechanism and a vibrating screening mechanism 9 arranged in the upper and lower spaces in the shell 1, and a driving mechanism 3 connected to the outer wall of the shell 1. The sand storage box 2 is provided with a feeding port 201 for the sand material to be screened to enter and store therein, and a feeding port 101 penetrating the top plate of the shell 1 and the sand storage box 2 is provided at the connection between the two. The feeding end of the intermittent quantitative feeding mechanism is connected to the feeding port 101, and its power input end is connected to the driving mechanism 3, so that it can intermittently rotate along the circumferential direction under the action of the driving mechanism 3, and then intermittently feed the quantitative sand material into the vibrating screening mechanism 9 below. The outer shell 1 is also provided with a first discharge port 102 and a second discharge port 103 which are respectively connected to the two discharge ends of the vibration screening mechanism 9. The vibration screening mechanism 9 is used to vibrate and screen the sand material falling into it so that the miscellaneous materials and the qualified materials can be discharged from the first discharge port 102 and the second discharge port 103 respectively.

[0031] When the sand screening machine of the utility model is working, the sand to be screened first enters the sand storage box 2 for storage through the feeding port 201, and then the driving mechanism 3 is started, driving the intermittent quantitative feeding mechanism to rotate intermittently in the circumferential direction, and then the quantitative sand is intermittently fed into the vibrating screening mechanism 9 below. The vibrating screening mechanism 9 then vibrates and screens the incoming sand to separate the miscellaneous materials from the qualified materials. Finally, the miscellaneous materials are discharged from the sand screening machine through the first discharge port 102 opened on the outer shell 1, and the qualified materials are discharged from the sand screening machine through the second discharge port 103 opened on the outer shell 1, thereby realizing the intermittent and quantitative feeding and screening separation of the sand.

[0032] The sand screening machine of the utility model can perform intermittent quantitative feeding when screening sand through the built-in intermittent quantitative feeding mechanism, thereby avoiding the situation where the vibration screening mechanism 9 is blocked due to excessive feeding amount. It not only improves the sand screening efficiency and reduces the maintenance and repair workload, but also because the sand is fed intermittently, it can also effectively improve the screening accuracy of the vibration screening mechanism 9 on the sand material and improve the sand screening quality.

[0033] Alternatively, if Figure 3 As shown, the intermittent quantitative feeding mechanism includes a quantitative feeding component 7 and an intermittent driving component 5 which are arranged to rotate vertically. The feeding end of the quantitative feeding component 7 extends into the feeding port 101, and the quantitative feeding component 7 is used to temporarily and quantitatively store multiple portions of sand. The power input end of the quantitative feeding component 7 is connected to the intermittent driving component 5, and the power input end of the intermittent driving component 5 is connected to the driving mechanism 3. The intermittent driving component 5 is used to drive the quantitative feeding component 7 to rotate intermittently along the circumferential direction under the action of the driving mechanism 3, so that the quantitative feeding component 7 intermittently feeds multiple portions of stored quantitative sand into the vibrating screening mechanism 9.

[0034] In this option, if Figure 3 and Figure 4 As shown, the quantitative feeding assembly 7 includes a first disc 71 and a third disc 77 which are arranged and fixed in the upper and lower spaces, and a rotating drum group connected to the output end of the intermittent drive assembly 5 and rotatably supported on the third disc 77. The first disc 71 is provided with a feed hole 72 which is arranged through the disc surface, and the third disc 77 is provided with a drop hole 78 which is arranged through the disc surface. The drop hole 78 and the feed hole 72 are arranged in a circumferentially staggered manner. A plurality of storage cavities which are arranged at intervals and axially penetrated are provided in the circumferential direction of the rotating drum group. The storage cavities are used to sequentially connect the feed hole 72 and the drop hole 78 during the circumferential intermittent rotation of the rotating drum group, so that the quantitative sand material enters the storage cavity through the feed hole 72 for storage, and then enters the vibrating screening mechanism 9 when the storage cavity is connected to the drop hole 78; preferably, the inner diameter of the drop hole 78 is equal to the inner diameter of the storage cavity. During operation, the drum group rotates intermittently in the circumferential direction under the action of the intermittent drive component 5. In one cycle of its intermittent rotation, the storage chamber on it is first connected with the feeding hole 72, so that the sand in the sand storage box 2 is temporarily stored in the storage chamber through the feeding port 101 and the feeding hole 72, and the quantity is realized through the volume of the storage chamber. Then, the drum group rotates under the action of the intermittent drive component 5, driving the storage chamber to rotate in the circumferential direction, and at the same time, the bottom end of the storage chamber is closed by the third disc 77. When the drum group rotates to the end of an intermittent rotation cycle, it stops at the feeding hole 78. At this time, the storage chamber containing sand is connected with the feeding hole 78, and the sand stored therein is discharged into the vibrating screening mechanism 9 below through the feeding hole 78, thereby realizing intermittent and quantitative feeding of sand.

[0035] Furthermore, if Figure 4 As shown, the rotating drum assembly includes a first rotating rod 73 vertically penetrating a third disc 77, a first bevel gear 79 fixed to the bottom end of the first rotating rod 73, a second disc 74 supported on the third disc 77 and fixed to the first rotating rod 73, and a material storage barrel 75 evenly spaced and fixed on the second disc 74 along the circumferential direction. The first bevel gear 79 is used to be connected to the output end of the intermittent drive component 5. The material storage barrel 75 is a hollow cylinder with two ends connected, and its inner cavity constitutes a material storage cavity. The upper open end of the material storage barrel 75 is used to communicate with the feed hole 72, and the opposite lower open end is connected to the corresponding through hole on the second disc 74, so as to communicate with the drop hole 78 through the through hole. When working, the intermittent drive component 5 transmits power to the first rotating rod 73 through the first bevel gear 79, and the first rotating rod 73 then drives the second disc 74 to rotate, thereby realizing the intermittent rotation of the material storage barrel 75 along the circumferential direction.

[0036] Preferably, if Figure 4 As shown, the quantitative feeding assembly 7 also includes a baffle 76 for temporarily closing the bottom opening of the storage barrel 75, and a weight-adding block for adding weight. The baffle 76 is rotatably arranged at the bottom end of the inner cavity of the storage barrel 75. The weight-adding block is fixed to one side of the baffle 76 to facilitate the subsequent feeding work. Figure 4 As shown, in the preferred embodiment, there are two material storage barrels 75, and the two material storage barrels 75 are symmetrically arranged along the circumferential direction. During operation, when the two symmetrically distributed material storage barrels 75 perform a single intermittent rotation, the two material storage barrels 75 are respectively located below the feeding hole 72 and above the discharge hole 78. As can be seen from the above, the third disc 77 is close to the second disc 74, and the inner diameter of the discharge hole 78 is equal to the inner diameter of the material storage barrel 75. Therefore, the material storage barrel 75 located above the discharge hole 78 will open downward under the action of the weight-increasing block in the baffle plate 76, and then the sand material inside it will be discharged downward, while the material storage barrel 75 located at the lower side of the feeding hole 72 will automatically fill the sand material in the sand storage box 2; when the intermittent rotation is performed again, the two material storage barrels 75 exchange positions, and in this process, the baffle plate 76 located above the discharge hole 78 is squeezed and then becomes horizontal, sealing the lower end of the material storage barrel 75, thereby achieving the purpose of quantitative discharge of sand material.

[0037] Alternatively, if Figure 5 and Figure 6As shown, the intermittent drive assembly 5 comprises a first transmission rod 51 connected to the output end of the driving mechanism 3, a rotating disk 52 fixed to the output end of the first transmission rod 51, a plurality of fixing posts 53 arranged at intervals along the circumferential direction and fixed vertically to the outer end of the rotating disk 52, a special-shaped disk 54 arranged close to the outer end of the rotating disk 52, a second transmission rod 55 vertically connected to the special-shaped disk 54, and a second bevel gear 56 fixed to the output end of the second transmission rod 55. The second bevel gear 56 is meshed and connected with the first bevel gear 79. The outer edge of the special-shaped disk 54 has a notch, and the fixing post 53 is used to abut against the notch to drive the special-shaped disk 54 to rotate after being driven by the rotating disk 52, and to come out of the notch after rotating through a set angle, so that the special-shaped disk 54 rotates intermittently in the circumferential direction, and then the first rotating rod 73 and the second disk 74 are driven to rotate intermittently in the circumferential direction through the meshing of the second bevel gear 56 and the first bevel gear 79.

[0038] In this option, if Figure 6 As shown, the special-shaped disk 54 is formed by a small semicircular disk and a large semicircular disk with different radii being butt-jointed and spliced, and one end of the diameters of the two are flush, and the other ends of the diameters of the two are staggered to form a notch. The second transmission rod 55 and the first transmission rod 51 are not on the same axis in a three-dimensional state, but the vertical planes of the two are the same plane. There are two fixed columns 53, and the two fixed columns 53 are arranged corresponding to the upper and lower ends of the special-shaped disk 54. The distance from the axis of the second transmission rod 55 to the uppermost point of the protruding part of the special-shaped disk 54 is equal to the distance from the axis of the second transmission rod 55 to the lowermost point of the outer surface of the fixed column 53 at the lower end, and the distance from the axis of the second transmission rod 55 to the lowermost part of the special-shaped disk 54 is less than the distance from the axis of the second transmission rod 55 to the uppermost point of the outer surface of the fixed column 53 at the lower end.

[0039] During operation, the driving mechanism 3 drives the first transmission rod 51 to rotate, and the first transmission rod 51 then drives the rotating disk 52 fixedly connected to its right end to rotate. When the rotating disk 52 rotates, the two fixed columns 53 fixedly connected to the outer side of its left end can be driven to rotate. When the fixed column 53 located on the lower side rotates and passes through the protruding part of the special-shaped disk 54, the special-shaped disk 54 will be driven to rotate until the fixed column 53 located at the lower part moves to the position of the fixed column 53 located at the upper part, and the protruding part of the special-shaped disk 54 falls off from the fixed column 53, and so on, thereby realizing intermittent motion; therefore, during the intermittent motion of the special-shaped disk 54, the second transmission rod 55 can be driven to rotate intermittently, and the second bevel gear 56 fixedly connected to the left end of the second transmission rod 55 is meshed with the first bevel gear 79, so the first bevel gear 79 can drive the second disc 74 fixedly connected to the lower part of its outer surface to rotate intermittently.

[0040] Preferably, if Figure 5As shown, the intermittent drive assembly 5 also includes two sets of limit sleeve rods 57, one ends of the two sets of limit sleeve rods 57 are respectively sleeved on the outer circle of the first transmission rod 51 and the second transmission rod 55, and the second ends of the two sets of limit sleeve rods 57 are fixed to the inner wall surface of the outer shell 1. The limit sleeve rods 57 are used to provide limiting support for the intermittent drive assembly 5.

[0041] Alternatively, if Figure 6 As shown, the driving mechanism 3 includes a fixing plate 31 fixed on the outer wall of the housing 1, and a motor 32 supported on the fixing plate 31, and the power input end of the intermittent quantitative feeding mechanism is connected to the output shaft of the motor 32. The sand screening machine for construction engineering also includes a stirring mechanism 4 for stirring the sand in the sand storage box 2, and the stirring mechanism 4 includes a stirring blade 44 located in the sand storage box 2, and a driving component for driving the stirring blade 44 to rotate, and the power input end of the driving component is connected to the output shaft of the motor 32. The stirring mechanism 4 is used to stir the sand stored in the sand storage box 2 to prevent the sand from agglomerating.

[0042] In this option, if Figure 6 As shown, the driving assembly includes a first pulley 41 fixed on the outer circle of the output shaft of the motor 32, a second rotating rod 42 passing through the outer wall of the sand storage box 2, a second pulley 43 fixed on the outer circle of the second rotating rod 42, and a belt 45 wound around the outer circle of the first pulley 41 and the second pulley 43. During operation, the motor 32 is started, so that the output end of the motor 32 drives the first pulley 41 to rotate through the coupling. As can be seen from the above, the outer surfaces of the first pulley 41 and the second pulley 43 are wrapped with a belt 45 together. Therefore, under the action of the belt 45, the second pulley 43 can be driven to rotate at the same time. The right end of the second pulley 43 is fixedly connected to the second rotating rod 42, and the second rotating rod 42 penetrates into the inner cavity of the sand storage box 2. Therefore, when the second pulley 43 drives the second rotating rod 42 to rotate, the second rotating rod 42 can simultaneously drive the stirring blade disc 44 fixedly connected to the left part of its outer surface to rotate, so that the stirring blade disc 44 continuously stirs the sand material inside the sand storage box 2, thereby avoiding the sand material inside the sand storage box 2 from agglomerating due to long-term accumulation.

[0043] Alternatively, if Figure 3 As shown, the vibrating screening mechanism 9 includes a screen plate 91 and a discharge plate 92 which are sequentially arranged in the upper and lower parts of the space, and a vibrator connected to the screen plate 91. The screen plate 91 is arranged obliquely below the intermittent quantitative feeding mechanism, and the downwardly inclined end of the screen plate 91 is connected to the first discharge port 102. The discharge plate 92 is arranged obliquely, and its downwardly inclined end is connected to the second discharge port 103. Further, as shown in FIG. Figure 3 As shown, a trapezoidal discharge box 8 is provided at each of the first discharge port 102 and the second discharge port 103 to guide the discharge of sand.

[0044] In this optional solution, a vibrator is fixedly connected to the lower left side of the sieve plate 91, and the vibrator is composed of a vibration motor, an eccentric shaft, a connecting rod, etc. in the prior art. The vibration motor is the power source of the vibrator, and generates eccentric force through rotation to drive the eccentric shaft to vibrate. The eccentric shaft is installed at the output end of the vibration motor. When the vibration motor is working, the eccentric shaft will generate asymmetric centrifugal force, thereby causing the vibrator to vibrate, and then the vibrator drives the sieve plate 91 to vibrate and screen; at the same time, the sieve plate 91 is connected to the inner surface of the outer shell 1 by telescopic rods and springs in the prior art, so that the purpose of vibrating and screening the sieve plate 91 can be met.

[0045] After the quantitative unloading component 7 performs quantitative intermittent unloading, the sand material falls onto the surface of the sieve plate 91, and then under the action of the vibrator at the lower left side of the sieve plate 91, the sieve plate 91 is vibrated and screened, and the qualified material screened will fall downward to the surface of the discharge plate 92, and the sieve plate 91 and the discharge plate 92 are both inclined, and the upper side of the left end of the sieve plate 91 is aligned with the upper side of the right end of the trapezoidal discharge box 8 located on the left, and the upper side of the right end of the discharge plate 92 is aligned with the upper side of the left end of the trapezoidal discharge box 8 located on the right. At the same time, the two trapezoidal discharge boxes 8 are respectively located at the lower sides of the first discharge port 102 and the second discharge port 103, so unqualified miscellaneous materials will be discharged from the first discharge port 102 to the trapezoidal discharge box 8 on the left, and qualified sand material will be discharged from the second discharge port 103 into the trapezoidal discharge box 8 on the right; and in the process of discharging, personnel can place the material receiving cart at the lower ends of the trapezoidal discharge boxes 8 on both sides to receive the materials.

[0046] Preferably, if Figure 1 and Figure 2 As shown, support blocks 6 are fixedly connected to the four corners of the lower end of the shell 1 to support the shell 1.

[0047] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sand screening machine for construction engineering, characterized in that: include: A housing (1), a sand storage box (2) connected to the top plate of the housing (1), an intermittent quantitative feeding mechanism and a vibration screening mechanism (9) arranged in the upper and lower spaces inside the housing (1), and a driving mechanism (3) connected to the outer wall of the housing (1); The sand storage box (2) is provided with a feeding port (201) for the sand material to be screened to enter and be stored therein, and a feeding port (101) penetrating through the top plate of the outer shell (1) and the sand storage box (2) is provided at the connection between the two. The feeding end of the intermittent quantitative feeding mechanism is connected to the feeding port (101), and the power input end thereof is connected to the driving mechanism (3), so that the mechanism intermittently rotates in the circumferential direction under the action of the driving mechanism (3), thereby intermittently feeding the quantitative sand material into the vibrating screening mechanism (9) below; The housing (1) is also provided with a first discharge port (102) and a second discharge port (103) respectively connected to two discharge ends of the vibration screening mechanism (9). The vibration screening mechanism (9) is used to vibrate and screen the sand material falling into it so that the miscellaneous materials and the qualified materials are discharged from the first discharge port (102) and the second discharge port (103) respectively.

2. The sand screening machine for construction engineering according to claim 1, characterized in that: The intermittent quantitative feeding mechanism comprises a quantitative feeding component (7) and an intermittent driving component (5) arranged to rotate vertically; The feeding end of the quantitative feeding component (7) extends into the feeding port (101), and the quantitative feeding component (7) is used for temporarily storing multiple portions of sand material in a quantitative manner; The power input end of the quantitative feeding component (7) is connected to the intermittent driving component (5), and the power input end of the intermittent driving component (5) is connected to the driving mechanism (3). The intermittent driving component (5) is used to drive the quantitative feeding component (7) to rotate intermittently along the circumferential direction under the action of the driving mechanism (3), thereby enabling the quantitative feeding component (7) to intermittently feed multiple portions of stored quantitative sand materials into the vibrating screening mechanism (9).

3. The sand screening machine for construction engineering according to claim 2, characterized in that: The quantitative feeding component (7) comprises a first disc (71) and a third disc (77) which are arranged vertically and fixedly in a spaced relationship, and a rotating drum group which is connected to the output end of the intermittent driving component (5) and is rotatably supported on the third disc (77); The first disc (71) is provided with a material inlet hole (72) penetrating the disc surface, and the third disc (77) is provided with a material drop hole (78) penetrating the disc surface. The material drop hole (78) and the material inlet hole (72) are staggeredly arranged along the circumferential direction. A plurality of storage cavities are arranged at intervals on the circumference of the drum assembly and are axially penetrated. The storage cavities are used to sequentially connect the feed hole (72) and the discharge hole (78) during the intermittent circumferential rotation of the drum assembly, so that a certain amount of sand material enters the storage cavity through the feed hole (72) for storage, and then enters the vibrating screening mechanism (9) when the storage cavity is connected to the discharge hole (78).

4. The sand screening machine for construction engineering according to claim 3, characterized in that: The rotating drum assembly comprises a first rotating rod (73) vertically penetrating a third circular disc (77), a first bevel gear (79) fixed to the bottom end of the first rotating rod (73), a second circular disc (74) supported on the third circular disc (77) and fixed to the first rotating rod (73), and a material storage barrel (75) fixed to the second circular disc (74) at uniform intervals along the circumferential direction; The first bevel gear (79) is used to be connected to the output end of the intermittent drive component (5); The material storage barrel (75) is in the shape of a hollow cylinder with two connected ends, and its inner cavity constitutes a material storage cavity. The upper open end of the material storage barrel (75) is used to communicate with the material inlet hole (72), and the opposite lower open end is connected to a through hole correspondingly opened on the second disc (74), so as to communicate with the drop hole (78) through the through hole.

5. The sand screening machine for construction engineering according to claim 4, characterized in that: The quantitative feeding assembly (7) further comprises a baffle (76) for temporarily closing the bottom opening of the storage barrel (75), and a weight-increasing block for increasing the weight; The baffle (76) is rotatably disposed at the bottom end of the inner cavity of the storage barrel (75); The weight-increasing block is fixed to one side of the baffle (76).

6. The sand screening machine for construction engineering according to claim 4, characterized in that: The intermittent drive assembly (5) comprises a first transmission rod (51) connected to the output end of the drive mechanism (3), a rotating disk (52) fixed to the output end of the first transmission rod (51), a plurality of fixing columns (53) arranged at intervals along the circumferential direction and fixed vertically to the outer end of the rotating disk (52), a special-shaped disk (54) arranged close to the outer end of the rotating disk (52), a second transmission rod (55) vertically connected to the special-shaped disk (54), and a second bevel gear (56) fixed to the output end of the second transmission rod (55); The second bevel gear (56) is meshingly connected with the first bevel gear (79); The outer edge of the special-shaped disk (54) is provided with a notch, and the fixing column (53) is used to abut against the notch after being driven by the rotating disk (52) to drive the special-shaped disk (54) to rotate, and to escape from the notch after rotating through a set angle, so that the special-shaped disk (54) intermittently rotates in the circumferential direction, and then drives the first rotating rod (73) and the second disk (74) to intermittently rotate in the circumferential direction through the meshing of the second bevel gear (56) and the first bevel gear (79).

7. The sand screening machine for construction engineering according to claim 6, characterized in that: The special-shaped disk (54) is formed by butting and splicing a small semi-circular disk and a large semi-circular disk with different radii, and one end of the diameter of the two is flush, and the other end of the diameter of the two is staggered to form a notch; The number of the fixing posts (53) is two, and the two fixing posts (53) are arranged corresponding to the upper and lower ends of the special-shaped plate (54); The distance between the axis of the second transmission rod (55) and the uppermost point of the protruding portion of the special-shaped disk (54) is equal to the distance between the axis of the second transmission rod (55) and the lowermost point of the outer surface of the fixing column (53) located at the lower end, and the distance between the axis of the second transmission rod (55) and the lowermost part of the special-shaped disk (54) is smaller than the distance between the axis of the second transmission rod (55) and the uppermost point of the outer surface of the fixing column (53) located at the lower end.

8. The sand screening machine for construction engineering according to claim 6, characterized in that: The intermittent drive assembly (5) further comprises two sets of limit sleeve rods (57), one end of the two sets of limit sleeve rods (57) being respectively sleeved on the outer circumference of the first transmission rod (51) and the second transmission rod (55), and the second ends of the two sets of limit sleeve rods (57) being fixed to the inner wall surface of the outer shell (1).

9. The sand screening machine for construction engineering according to claim 1, characterized in that: The driving mechanism (3) comprises a fixing plate (31) fixed on the outer wall surface of the housing (1), and a motor (32) supported on the fixing plate (31), and the power input end of the intermittent quantitative feeding mechanism is connected to the output shaft of the motor (32); The sand screening machine for construction engineering also includes a stirring mechanism (4) for stirring the sand material in the sand storage box (2), the stirring mechanism (4) including a stirring blade disc (44) located in the sand storage box (2), and a driving component for driving the stirring blade disc (44) to rotate, wherein the power input end of the driving component is connected to the output shaft of the motor (32).

10. The sand screening machine for construction engineering according to claim 1, characterized in that: The vibrating screening mechanism (9) comprises a screen plate (91) and a discharge plate (92) which are arranged in sequence in a space up and down, and a vibrator connected to the screen plate (91); The sieve plate (91) is tiltedly arranged below the intermittent quantitative feeding mechanism, and the downwardly inclined end of the sieve plate (91) is connected to the first discharge port (102); The discharge plate (92) is arranged to be inclined, and its downwardly inclined end is connected to the second discharge port (103).

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