Concrete material screening plant for construction
Technical Field
The invention relates to the technical field of building construction, in particular to a concrete material screening device for building construction, which belongs to the technical field of building concrete material screening.
Background
Concrete is one of the most main civil engineering materials in the current generation, and is prepared by mixing cementing materials, granular aggregate, water and some additives in proportion, wherein the grain size grading of the granular aggregate of the concrete directly influences the quality of the concrete, and the concrete material needs to be screened;
the sieving device for preparing the sand and stone materials by using the concrete comprises an equipment frame, a feeding frame, a middle sieve roller rotatably arranged on the equipment frame, a discharging cylinder fixed on the equipment frame, a spiral lifting rod arranged in the feeding frame and the middle sieve roller, a first threaded blade fixedly connected between the spiral lifting rod and the inner side wall of the middle sieve roller, a fine sieve roller rotatably connected with the equipment frame, a first receiving hopper for receiving materials obtained by sieving through the fine sieve roller, a second receiving hopper for receiving materials obtained by sieving through the fine sieve roller, and a second threaded blade fixedly connected between the inner side wall of the fine sieve roller and the outer side wall of the middle sieve roller. The application can solve the problems that the traditional sand screening equipment can not thoroughly screen sand materials and the screening grid is easy to be blocked;
The invention with the authorized bulletin number of CN 107470124B relates to a concrete coarse aggregate screening machine, which comprises a base, a support plate, a box body, a feed hopper, a support block, a discharge hopper, a driving mechanism and the like, wherein the support plate is arranged on the left side of the top of the base, the box body and the support block are arranged on the right wall of the support plate, the box body is arranged above the support block, the feed hopper is arranged on the top of the box body, a first through hole is formed in the left wall of the box body, the discharge hopper is arranged at the bottom of the box body, the left wall of the discharge hopper is connected with the right side of the support block, the driving mechanism is arranged on the upper side of the front wall of the support plate, and the swing plate is arranged on the driving mechanism. The invention achieves the effects of multiple screening and high screening efficiency, and the screen plate and the screen mesh are matched for use, so that the screening machine can screen concrete for multiple times, thereby improving the quality of the screened concrete;
and combine concrete material screening plant's in-service use, present concrete material screening plant still has certain drawback when using, if:
1. The concrete materials are generally transported by trucks, dumped and unloaded and stacked directly after being transported to the field, and then are transported by forklift or trolley to be screened, so that the procedures are increased, and the screening treatment can not be carried out simultaneously after the materials are transported to the field, so that the efficiency is affected;
2. the concrete material is large in daily conveying amount, a large screen is generally selected when the screening device is selected, but after long-term screening use, the large screen can be bent or even broken, and the large screen needs to be replaced integrally, so that the cost is increased;
3. at present, a corresponding scattering mechanism is generally arranged on a material feeding path aiming at material blocks adhered to concrete materials, and the scattering mechanism can influence the material discharging speed and the screening efficiency.
Therefore, we propose a concrete material screening device for construction so as to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a concrete material screening device for building construction, which solves the problems that the prior concrete material screening device provided by the background art is inconvenient to directly pick up and screen materials from a transport truck, adopts a large screen, has high maintenance cost, affects the blanking speed and affects the screening efficiency.
The concrete material screening device for the building construction comprises a screen box, wherein a feeding hopper for feeding is arranged above the screen box, and a screen frame for installing a screening net is arranged inside the screen box;
Further comprises:
The sliding table is arranged above the screen box in a left-right sliding manner, the feeding hopper is rotatably arranged at the top of the sliding table, and the bottom of the feeding hopper penetrates through the top end of the sliding table and is communicated with the top of the screen box;
wherein a receiving baffle capable of adjusting the opening angle is arranged above the feeding hopper;
The screen frame is arranged in the middle of the inner side wall of the screen box in a fixed mode, can be vertically and telescopically and slidably arranged above the fixed frame, a vibration mechanism is arranged below the screen frame, a groove is formed in the screen frame, and a scattering mechanism is arranged in the groove;
the telescopic cloth is installed on the left side and the right side of the sliding table, a supporting rod is fixed in the middle of the telescopic cloth, an end rod is fixed at the top end of the telescopic cloth, and the supporting rod and the end rod are slidably installed on the inner side of the screen box.
Still further, the top limit side symmetry rotation of screen box installs the lead screw, the top and the output fixed connection of accommodate motor of lead screw, pass through the drive belt transmission between the top of lead screw and be connected, the avris bottom integration fixed mounting of slip table has the connecting plate, the outside at the lead screw is connected to the connecting plate, the bottom surface of connecting plate is laminated mutually with the top surface of screen box.
Still further, connect the material baffle to be formed by fixed baffle and adjustable fender combination, fixed baffle fixed mounting is in the top one side of feeder hopper, adjustable fender passes through the fixed axle and rotates the top opposite side of connecting at the feeder hopper, adjustable fender and fixed baffle laminating set up the inside at the feeder hopper, the telescopic link is installed at fixed baffle outside top hinge, correspond the hinge between the top of telescopic link and the outside top of adjustable baffle.
Still further, the bottom of feeder hopper is the slope structure towards the slip table, the bottom outside protrusion of feeder hopper is provided with outer gear circle, the outside meshing of outer gear circle is connected with drive gear, drive gear rotates the top avris of installing at the slip table.
Still further, the top surface of mount is the inward sloping setting, the bottom surface integration fixed mounting of screen frame has first spacing montant, the bottom of first spacing montant alternates in the inside of mount downwards, the bottom outside of first spacing montant is connected with the first spring of being connected between the bottom surface of mount.
Still further, the vibration mechanism includes:
The extrusion shaft is rotatably arranged in the screen box, and the top end of the extrusion shaft is connected with the output end of the driving motor fixed on the outer side of the left end of the screen box;
the extrusion wheel is fixed on the outer side of the extrusion shaft and corresponds to the frame of the screen frame, and a first magnetic plate is integrally arranged on the side of the extrusion wheel;
the connecting frame, connecting frame fixed mounting is in the bottom surface of screen frame, correspond the block between the limit side of connecting frame and extrusion wheel, the bottom surface of connecting frame is fixed with and first magnetic plate between magnetism absorptive second magnetic plate.
Further, a fan is fixedly arranged at the outer side of the left end of the screen box, an air inlet cover is communicated with the output end of the fan, the air inlet cover is communicated with the left side of the bottom of the screen box, a partition plate positioned below the extrusion shaft is arranged in the screen box, and a door plate is arranged at the right end of the screen box;
Wherein, the baffle is the slant setting, baffle equidistant array is fixed in the inside of sieve case.
Still further, the inside top surface of sieve case downwards protrusion is provided with the spacing, sliding connection branch and end pole between spacing and the sieve case, the tip integration fixed mounting of end pole has the dead lever, the top threaded connection of dead lever has spacing end.
Furthermore, a chute positioned above the limiting frame is arranged on the side of the screen box, and the top end of the fixing rod penetrates through the chute and is connected with the limiting end.
Still further, the breaking mechanism includes:
The scattering plate is arranged in the groove, and a thorn-shaped structure is integrally protruded from the top surface of the scattering plate;
the second limiting vertical rod is fixedly arranged inside the frame structure of the screen frame, the second limiting vertical rod is inserted into the scattering plate, and a second spring positioned between the top surface of the scattering plate and the screen frame is sleeved outside the second limiting vertical rod.
Compared with the prior art, the concrete material screening device for the building construction has the advantages that the concrete material conveyed by the truck can be directly received through the feeding hopper which is rotatably and slidably arranged at the top of the screening device, screening is convenient and quick, the screen mesh and the scattering mechanism are integrated, the rapid screening is convenient, the screen mesh is assembled in blocks, the maintenance cost can be reduced, and the screening efficiency is improved;
1. The utility model discloses a be provided with slip table, lead screw and feeder hopper in this scheme, the slip table passes through the connecting plate to be connected in the outside of lead screw, through the rotation of lead screw, is convenient for carry out position sliding adjustment to the slip table at the top of screen box, simultaneously through the revolution mechanic of feeder hopper at the slip table top, is convenient for adjust the angle of feeder hopper to be convenient for directly aim at the truck afterbody through the feeder hopper, be convenient for the material and connect and get;
2. The fixed baffle, the movable baffle and the telescopic rod are arranged in the scheme, the movable baffle can be driven to rotate on the outer side of the fixed baffle through the telescopic of the telescopic rod, when the movable baffle rotates outwards, the opening range of the top material receiving opening can be increased, the situation that the side materials are not received when the material feeding amount is large is avoided, when the movable baffle rotates inwards, the opening range of the top can be reduced, and the material splashing can be reduced conveniently when the material feeding amount is small;
3. The extrusion shaft, the extrusion wheel and the connecting frame are arranged in the scheme, the side of the extrusion wheel is clamped at the bottom of the connecting frame, the extrusion wheel and the connecting frame are attached through the first magnetic plate and the second magnetic plate which are mutually magnetically adsorbed, and when the extrusion wheel is eccentrically rotated through the extrusion shaft, the impact on the screen frame can be reduced, and the service life of the screen frame is prolonged;
4. The utility model discloses a be provided with recess, beat board and second spring in this scheme, when the screen frame shakes, can make through its up-and-down motion break up the board and upwards stretch out from the inside of recess under inertial action to utilize the thorn form protrusion of break up board surface to break up the use of bulk material when being convenient for the screen frame vibrations, and through the elasticity effect of second spring, when shutting down, can push down break up the board, make and break up the board and not bulge in the top surface of screen frame, be convenient for surface cleaning;
5. Be provided with flexible cloth, end pole, dead lever and spacing end in this scheme, all be connected with flexible cloth in the both sides of slip table, the avris of flexible cloth can slide in the inboard of spacing through branch and end pole, and screw up through the spacing end that the dead lever that end pole tip is fixed is connected, be convenient for fix the end pole in the below of spout, be convenient for utilize flexible cloth to carry out dust and shelter from, push-and-pull through the end pole simultaneously, be convenient for manual work or forklift are direct to send into the material and screen box's top screening.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic view of the overall left-end shaft side structure of the present invention;
FIG. 2 is a schematic view of the structure of the right end shaft of the whole present invention;
FIG. 3 is a schematic view of the front overall cut-away structure of the present invention;
FIG. 4 is a schematic view of the side overall cut-away structure of the present invention;
FIG. 5 is a schematic view of the structure of the fixing frame and the screen frame of the invention;
FIG. 6 is an enlarged schematic view of the structure of FIG. 3A according to the present invention;
FIG. 7 is a schematic view of the cross-sectional structure of the screen frame of the present invention;
FIG. 8 is a schematic view of the mounting structure of the stretchable fabric of the present invention;
FIG. 9 is an enlarged schematic view of the structure of FIG. 7B according to the present invention;
FIG. 10 is a schematic view showing the overall structure of the diffuser plate according to the present invention.
The device comprises a screen box, 101, travelling wheels, 102, universal wheels, 2, a sliding table, 3, a screw rod, 4, a connecting plate, 5, an adjusting motor, 6, a driving belt, 7, a feeding hopper, 8, a fixed baffle, 9, a movable baffle, 10, a fixed shaft, 11, a telescopic rod, 12, an outer gear ring, 13, a driving gear, 14, a fixed frame, 15, a screen frame, 16, a screening net, 17, a first limit vertical rod, 18, a first spring, 19, a squeezing shaft, 20, a driving motor, 21, a squeezing wheel, 22, a first magnetic plate, 23, a connecting frame, 24, a second magnetic plate, 25, a fan, 26, an air inlet cover, 27, a baffle plate, 28, a door plate, 29, a telescopic cloth, 30, a supporting rod, 31, an end rod, 32, a limit frame, 33, a fixed rod, 34, a limit end head, 35, a sliding groove, 36, a groove, 37, a scattering plate, 38, a bottom plate, 39, a second limit vertical rod, 40 and a second spring.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application, so that the implementation process of how the technical means are applied to solve the technical problems and achieve the technical effects of the present application can be fully understood and implemented, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments.
In order to solve the problems that when the concrete material screening device for building construction in the prior art is used, dumping materials of a material transporting truck cannot be directly taken for screening and a large screen piece is adopted, so that the long service life is influenced, and the maintenance cost is increased, the invention provides a technical scheme as shown in fig. 1-7, wherein the concrete material screening device for building construction comprises a screen box 1, travelling wheels 101, universal wheels 102, a sliding table 2, a screw rod 3, a connecting plate 4, an adjusting motor 5, a driving belt 6, a feeding hopper 7, a fixed baffle 8, a movable baffle 9, a fixed shaft 10, a telescopic rod 11, an external gear ring 12, a driving gear 13, a fixed frame 14, a screen frame 15, a screening net 16, a first limiting vertical rod 17, a first spring 18, a pressing shaft 19, a driving motor 20, a pressing wheel 21, a first magnetic plate 22, a connecting frame 23 and a second magnetic plate 24;
In the figures 1, 2 and 3, the bottom surface of the screen box 1 is of a downward right inclined structure, a travelling wheel 101 is fixedly arranged at the left end of the bottom of the screen box 1, a universal wheel 102 is arranged at the right end of the bottom of the screen box 1 so as to facilitate the position movement of the screen box 1, a screw rod 3 is symmetrically and rotatably arranged at the side of the top end of the screen box 1, the top end of the screw rod 3 is fixedly connected with the output end of an adjusting motor 5, the top ends of the screw rod 3 are in transmission connection through a transmission belt 6, a connecting plate 4 is integrally and fixedly arranged at the bottom of the side of the sliding table 2, the connecting plate 4 is connected to the outer side of the screw rod 3, the bottom surface of the connecting plate 4 is attached to the top surface of the screen box 1, a feed hopper 7 is rotatably arranged at the top of the sliding table 2, the bottom of the feed hopper 7 is communicated with the top of the screen box 1, an outer gear ring 12 is convexly arranged at the outer side of the bottom of the feed hopper 7, a driving gear 13 is in meshed connection with the outer side of the outer gear ring 12, and the driving gear 13 is rotatably arranged at the side of the top of the sliding table 2;
By adopting the technical scheme, the screw rod 3 can be driven to rotate by the adjusting motor 5, the connecting plate 4 and the sliding table 2 are driven to slide left and right above the screen box 1, so that the left and right positions of the sliding table 2 at the top end of the screen box 1 are adjusted, the angle of the feed hopper 7 at the top of the sliding table 2 can be adjusted by the meshing driving between the driving gear 13 and the outer gear ring 12, the direction of the feed hopper 7 is convenient to adjust, the screen box 1 is conveniently pushed to the tail of a material transporting truck, and the feed hopper 7 is convenient to take materials which are inclined inwards by the truck;
In the figures 2 and 4, the bottom of the feed hopper 7 is of an inclined structure facing the sliding table 2, a material receiving baffle capable of adjusting the opening angle is arranged above the feed hopper 7 and is formed by combining a fixed baffle 8 and a movable baffle 9, the fixed baffle 8 is fixedly arranged on one side of the top of the feed hopper 7, the movable baffle 9 is rotationally connected on the other side of the top of the feed hopper 7 through a fixed shaft 10, the movable baffle 9 and the fixed baffle 8 are attached to the inside of the feed hopper 7, a telescopic rod 11 is hinged to the top of the outer side of the fixed baffle 8, and the top of the telescopic rod 11 is correspondingly hinged to the top of the outer side of the movable baffle 9;
By adopting the technical scheme, the movable baffle plate 9 can be driven to conduct angle adjustment on the outer side of the fixed baffle plate 8 through the expansion of the expansion rod 11, so that the distance between the top of the movable baffle plate 9 and the top of the fixed baffle plate 8 is reduced, the top opening range of the feeding position is adjusted, when the expansion rod 11 stretches to drive the movable baffle plate 9 to rotate outwards through the fixed shaft 10, the top opening range of the fixed baffle plate 8 and the movable baffle plate 9 is enlarged, when the material entering amount is large, the material is prevented from spilling outside, the complete material receiving is ensured, the screening is facilitated, when the expansion rod 11 retracts to drive the movable baffle plate 9 to rotate inwards through the fixed shaft 10, the top opening range of the fixed baffle plate 8 and the movable baffle plate 9 is reduced, the material is prevented from splashing outwards from the position of the feeding opening when the material entering amount is small, and the material scattering is reduced;
In the figures 3, 4,5 and 6, a fixed frame 14 is fixedly arranged in the middle of the inner side wall of a screen box 1, the top surface of the fixed frame 14 is obliquely arranged inwards, a first limit vertical rod 17 is integrally and fixedly arranged on the bottom surface of a screen frame 15, the bottom end of the first limit vertical rod 17 is penetrated downwards in the fixed frame 14, a first spring 18 connected between the bottom end outer side of the first limit vertical rod 17 and the bottom surface of the fixed frame 14 is connected with the bottom end outer side of the first limit vertical rod, a vibration mechanism is arranged below the screen frame 15 and comprises a pressing shaft 19, a pressing wheel 21 and a connecting frame 23, the pressing shaft 19 is rotatably arranged in the screen box 1, the top end of the pressing shaft 19 is connected with the output end of a driving motor 20 fixed on the outer side of the left end of the screen box 1, a pressing wheel 21 corresponding to the frame of the screen frame 15 is integrally provided with a first magnetic plate 22, the connecting frame 23 is fixedly arranged on the bottom surface of the screen frame 15, the connecting frame 23 is correspondingly clamped with the side of the pressing wheel 21, and a second magnetic plate 24 adsorbed between the bottom surface of the connecting frame 23 and the first magnetic plate 22 is fixed;
by adopting the technical scheme, the extrusion shaft 19 is driven to rotate by the driving motor 20, the extrusion wheel 21 can be driven to eccentrically rotate, the extrusion wheel 21 is utilized to push the connecting frame 23, the screen frame 15 can conveniently slide up and down above the fixed frame 14 through the first limiting vertical rod 17, the screen frame 15 can conveniently vibrate while the extrusion wheel 21 circularly rotates through elastic reset of the first spring 18 and magnetic adsorption between the first magnetic plate 22 and the second magnetic plate 24, screening is convenient to use, meanwhile, the screen frame 16 is arranged in blocks through the frame structure of the screen frame 15, local maintenance and replacement are convenient, and maintenance cost is reduced;
In a specific scene, as shown in fig. 1 and 2, the screen box 1 is moved to a position suitable for unloading of a transport truck through travelling wheels 101 and universal wheels 102 respectively arranged on two sides of the bottom of the screen box 1, a driving belt 6 is used for driving and connecting the end part of a screw rod 3 through the starting of an adjusting motor 5, so that the screw rod 3 drives a connecting plate 4 and a sliding table 2 to slide at the top end of the screen box 1, the sliding table 2 slides to the left end of the top of the screen box 1, a driving gear 13 is started to drive a feeding hopper 7 to rotate and adjust at the top of the sliding table 2 through the meshing of the driving gear 13 and an external gear ring 12, and the feeding hopper 7 can be rotated to be vertically arranged between the screen box 1 as shown in fig. 1;
After the material transportation truck arrives at the scene, the tail of the truck hopper is aligned above the feeding hopper 7, at the moment, more materials are in the truck hopper, the flow speed is high during dumping, in order to avoid the leakage of the materials to the outside, the telescopic rod 11 is extended, the telescopic rod 11 drives the movable baffle plate 9 to rotate outwards around the fixed shaft 10 connected with the bottom of the telescopic rod, the top end interval size of the fixed baffle plate 8 and the movable baffle plate 9 is increased, the top opening range is enlarged, the concrete materials are dumped to the inside of the feeding hopper 7 through lifting and tilting of the truck hopper, the bottom surface of the feeding hopper 7 is of an inclined surface structure inclined to the sliding table 2, and the materials are assisted to enter the top of the screen box 1 through the communication of the feeding hopper 7 and the screen box 1;
Starting a driving motor 20, enabling the driving motor 20 to drive an extrusion shaft 19 to drive an extrusion wheel 21, enabling the extrusion shaft 19 to extrude a connecting frame 23 through eccentric rotation of the extrusion wheel 21, enabling the screen frame 15 to slide above a fixed frame 14 through limiting of a first limiting vertical rod 17 due to fixed connection between the connecting frame 23 and the screen frame 15, enabling the screen frame 15 to slide up and down circularly when the extrusion wheel 21 eccentrically rotates under the elastic action of a first spring 18, facilitating vibration of a screening net 16 to screen materials, enabling a first magnetic plate 22 fixed on the outer side of the extrusion wheel 21 to magnetically adsorb with a second magnetic plate 24 fixed on the bottom surface of the connecting frame 23, reducing impact strength of the extrusion wheel 21 to the connecting frame 23 and the screen frame 15 through the magnetic adsorption, prolonging service life of the screening net 16, enabling the screening net 16 to be arranged in a frame structure of the screen frame 15 in a lump mode, facilitating maintenance, and being beneficial to reducing maintenance cost;
Wherein, the material through screening net 16 sieves flows out from the right-hand member opening of screen box 1 through the bottom slope structure of screen box 1, and screen box 1 right-hand member opening part is fixed with door plant 28, wherein is fixed between the top of door plant 28 and the screen box 1, can avoid the material to splash when the material flows out, and can directly arrange the conveyer belt with the right-hand member opening of screen box 1 to concentrate the material after sieving.
In order to solve the problems that the existing concrete material screening device in the prior art can cause dust of materials to fly upwards when screening and influence the working environment, as shown in fig. 1-8, the invention provides the technical scheme that the concrete material screening device for building construction further comprises a fan 25, an air inlet cover 26, a baffle 27, a door plate 28, telescopic cloth 29, a supporting rod 30, an end rod 31, a limiting frame 32, a fixed rod 33, a limiting end head 34 and a chute 35;
in the figures 1 and 3, a fan 25 is fixedly arranged at the outer side of the left end of the screen box 1, an air inlet cover 26 is communicated with the output end of the fan 25, the air inlet cover 26 is communicated with the left side of the bottom of the screen box 1, a baffle 27 positioned below the extrusion shaft 19 is arranged in the screen box 1, a door plate 28 is arranged at the right end of the screen box 1, the baffle 27 is obliquely arranged, and an equidistant array of the baffles 27 is fixed in the screen box 1;
By adopting the technical scheme, the partition plates 27 obliquely arranged in the screen box 1 are arranged in an array, so that the falling of materials is not influenced, meanwhile, the blocking can be performed when the flying dust of the materials flies upwards, the air blower 25 is used for introducing air flow to the bottom of the screen box 1 through the air inlet cover 26, the drying of the materials can be assisted, the flowing and discharging of the materials are accelerated, and the flying dust on the upper layer and above the screen box 1 can be adsorbed through the negative pressure generated by the flowing of the air flow, so that the flying dust is reduced;
In fig. 2, 3, 4 and 8, the telescopic cloth 29 is installed on both sides of the sliding table 2, a supporting rod 30 is fixed in the middle of the telescopic cloth 29, an end rod 31 is fixed at the top end of the telescopic cloth 29, a limit frame 32 is arranged on the inner top surface of the screen box 1 in a downward protruding mode, a gap between the limit frame 32 and the screen box 1 is used for sliding the supporting rod 30 and the end head of the end rod 31, a fixing rod 33 is integrally and fixedly installed at the end part of the end rod 31, a limit end 34 is connected with the top end of the fixing rod 33 in a threaded manner, a sliding groove 35 positioned above the limit frame 32 is formed on the side of the screen box 1, and the top end of the fixing rod 33 penetrates through the sliding groove 35 and is connected with the limit end 34;
By adopting the technical scheme, the telescopic cloth 29 is connected to the left end and the right end of the sliding table 2 at the same time, when the sliding table 2 slides, the telescopic cloth 29 can be automatically pulled, the outer end of the telescopic cloth 29 is connected with the end rod 31, the end rod 31 is fixed on the inner side of the screen box 1 through the threaded connection of the fixed rod 33 and the limiting end 34, and the top of the screen box 1 can be covered, so that flying dust generated when the vibrating screen is carried out is avoided;
In a specific application scenario, as shown in fig. 2, fig. 4 and fig. 8, when the sliding table 2 slides in position, as both ends of the sliding table 2 are connected with the telescopic cloth 29, the sliding table 2 moves to push and pull the telescopic cloth 29, wherein the middle part and the end part of the telescopic cloth 29 are respectively fixed with the support rod 30 and the end rod 31, the end parts of the support rod 30 and the end rod 31 are slidably connected in a gap between the screen box 1 and the end rod 31, when the telescopic cloth 29 slides and stretches, the sliding of the support rod 30 is realized, the position is stable, the fixing rod 33 is fixed above the top end of the end rod 31, the top end of the fixing rod 33 penetrates through the inside of the sliding groove 35 transversely formed in the surface of the screen box 1, not only the sliding limit of the end rod 31 can be further realized, but also the position of the end rod 31 can be extruded and limited through the screwing of the limiting end 34 connected with the top end of the fixing rod 33, so that when the end rod 31 is fixed at the end part of the screen box 1, the top of the screen box 1 is covered by the telescopic cloth 29, the top of the screen box 1 is prevented from generating dust, and when the end rod 31 is fixed at the end part of the screen box 1, the end box 1 is fixed at the end part of the screen box 1, and the gap can be directly used with the screen box 1 or the gap, and the user can be conveniently used.
In order to solve the problems that in the prior art, a scattering mechanism is arranged on a feeding path, so that the feeding speed is influenced and the screening efficiency is reduced, as shown in fig. 1-10, the invention provides the technical scheme that the concrete material screening device for building construction further comprises a groove 36, a scattering plate 37, a bottom plate 38, a second limiting vertical rod 39 and a second spring 40;
In fig. 3, 7, 9 and 10, a groove 36 is formed in the screen frame 15, a bottom plate 38 is fixedly mounted on the bottom surface of the groove 36, a scattering mechanism is arranged in the groove 36 and comprises a scattering plate 37, a second limiting vertical rod 39 and a second spring 40, the scattering plate 37 is arranged in the groove 36, a thorn-shaped structure is integrally protruded on the top surface of the scattering plate 37, the second limiting vertical rod 39 is fixedly mounted in the frame structure of the screen frame 15, the second limiting vertical rod 39 is inserted in the scattering plate 37, and a second spring 40 positioned between the top surface of the scattering plate 37 and the screen frame 15 is sleeved on the outer side of the second limiting vertical rod 39;
By adopting the technical scheme, when the screen frame 15 vibrates, the scattering plate 37 can slide up and down along the limit of the second limit vertical rod 39 by utilizing inertia, and the blocked materials can be broken through the top end of the scattering plate 37, so that screening is convenient;
In a specific application scenario, as shown in fig. 7 and 9, when the extrusion wheel 21 drives and shakes the screen frame 15, the scattering plate 37 can be thrown out in the groove 36 due to inertia, and the end part of the scattering plate 37 is limited and connected to the outer side of the second limiting vertical rod 39 so as to ensure that the scattering plate 37 slides up and down, when the scattering plate 37 slides up and protrudes out of the top surface of the screen frame 15, the scattering plate 37 is inserted into a block material through a thorn-shaped structure at the top end of the scattering plate 37, and the block material is convenient to scatter through the vibration cooperation of the screen frame 15, so that screening is convenient, and the bottom plate 38 of the groove 36 is fixed.
All other embodiments, which are obtained by persons skilled in the art without creative efforts, are within the protection scope of the present invention based on the embodiments of the present invention, and what is not described in detail in the present specification belongs to the prior art well known to those skilled in the art, and furthermore, the terms upper, lower, left, right, front, rear, etc. herein represent relative positions rather than absolute positions only.
Standard parts used in the invention can be purchased from the market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of all parts adopt conventional means such as mature bolts, rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that the details are not described.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.