CN115069388A - Premixed concrete sandstone aggregate production screening system and operation method - Google Patents

Abstract

The invention provides a premixed concrete gravel aggregate production screening system and an operation method thereof, and the system comprises gravel, a coarse crushing workshop, a middle crushing workshop, an impact crusher, an undersize belt machine, a vibrating screen, an intelligent control induction device, a heat preservation shed, a top heating system and the like.

Description

Premixed concrete sandstone aggregate production screening system and operation method

Technical Field

The invention relates to the field of production of premixed concrete aggregate, in particular to a production screening system for premixed concrete gravel aggregate and an operation method.

Background

With the high-speed development of hydropower industry, the scale of hydropower stations is gradually increased, the demand of artificial sandstone aggregates is increased, the processing technology of a sandstone processing system is more perfect, the process design concept is developed towards the idea of more crushing and less grinding, replacing grinding by crushing, and combining crushing and grinding, and the processing equipment is further developed towards intellectualization, large-scale and environmental protection. Advanced equipment such as a high-frequency screen, a long-distance belt conveyor, a winnowing stone powder device and the like can be more widely applied to a large-scale sandstone system in the future.

At present, the lithology of sandstone raw materials of hydroelectric engineering mainly comprises limestone, sandstone, granite, basalt, quartzite, rhyolite, gneiss, orthobarite, diabase, marble, tuff and the like. The produced coarse aggregate often has the problem of excessive mud content, the cost is increased due to the fact that small stones with excessive mud content are returned to be screened and washed, and certain quality risk is brought to quality control in the concrete production process.

Meanwhile, a heat insulation system adopted by the existing concrete premixing has certain limitation, cannot provide heat insulation measures in all directions, and particularly has frequent heat exchange between a heat insulation shed and the outside and easy heat loss in the process of conveying vehicles entering and exiting a stock ground. Moreover, when a vehicle passes in and out, the traditional cotton door curtain heat-insulating door needs to be pulled and closed manually, the operation is more complicated, and meanwhile, the heat-insulating shed is structurally fixed, so that the production requirement of suddenly increasing the yield is difficult to meet.

Disclosure of Invention

The invention aims to provide a screening system and an operation method for producing ready-mixed concrete aggregate, which can ensure the yield of the ready-mixed concrete aggregate, reduce the mud content of the aggregate, ensure the heat preservation control in the subsequent production of the ready-mixed concrete and have better technical and economic benefits.

In order to solve the technical problem, the invention provides an operation method of a production and screening system for premixed concrete sandstone aggregate, which comprises the following steps:

1. the design of a closed-circuit type multistage screening production system comprises the following steps: the closed-circuit multi-stage screening production system comprises a coarse crushing workshop, a buffer steel grid, a middle crushing workshop, a secondary screening net, a secondary screening workshop, a stone washing tank, an impact crusher, a multi-stage screening net, a superfine crushing workshop and a rod mill workshop, and gravels are sequentially produced and screened in each area of the closed-circuit multi-stage screening production system to obtain aggregates;

2. optimizing the impact crusher: the method comprises the following steps of placing buffering material angle steel in an impact crusher, wherein the buffering material angle steel comprises a first-stage buffering material angle steel, a second-stage buffering material angle steel and a third-stage buffering material angle steel which are respectively installed in the impact crusher, and sequentially connecting the first-stage buffering material angle steel, the second-stage buffering material angle steel and the third-stage buffering material angle steel to the impact crusher by using angle steel fixing bolts;

3. installing a foundation of the impact crusher: installing a reaction crusher on a profile steel foundation, arranging I-shaped steel stand columns on a steel base plate, arranging angle steel inclined struts between the I-shaped steel stand columns, arranging I-shaped steel cross beams on the top surfaces of the I-shaped steel stand columns, connecting a foundation plate to the upper sides of the I-shaped steel cross beams, arranging guardrails around the foundation plate, and arranging a crawling ladder on one side of the foundation plate;

4. strengthen and easily change the installation of reinforcing bar mesh screen: respectively penetrating a plurality of preset screws on the side of a mesh screen frame into different meshes of a steel wire mesh, and then arranging a mesh screen easy-to-detach fixing plate on the steel wire mesh;

5. and (3) installation in a screening workshop: a feeding adhesive tape machine is mounted on a workshop cross beam at the uppermost end of a coarse crushing workshop, a feeding chute is mounted at the bottom of the feeding adhesive tape machine, a vibrating screen is mounted below the feeding chute, a buffer type steel grid is mounted below the vibrating screen, a screen hopper is arranged at the front end of the vibrating screen, an on-screen chute communicated with the buffer type steel grid is mounted below the vibrating screen, an off-screen adhesive tape machine is mounted below the screen chute, a heavy hammer crusher is arranged below the screen hopper, a discharging machine is arranged below the heavy hammer crusher, and a discharge port arc door is mounted in the discharging machine;

6. installing an intelligent control screening terminal: an intelligent control screening terminal is arranged in the second screening workshop, and an intelligent control sensing device is arranged below the discharge port;

7. washing aggregate: a water gun fixing plate is arranged on one side of the stone washing groove base, at least two water guns are arranged on the water gun fixing plate, pressure-adjustable water outlet nozzles are arranged at the end parts of the water guns, water gun side supports are arranged on two sides of each water gun, then the water guns are opened, and aggregate in the stone washing groove is washed;

8. controlling the mud content of the aggregate: arranging an undersize adhesive tape machine below the vibrating screen, arranging an undersize adhesive tape machine support below the undersize adhesive tape machine, arranging a conveying belt on one side of the undersize adhesive tape machine, arranging a plurality of flushing support vertical rods on the upper part of the conveying belt, arranging flushing support cross beams among the flushing support vertical rods, arranging flushing equipment on the flushing support cross beams, and flushing aggregate when the aggregate is conveyed through the conveying belt;

9. mounting the ready-mixed concrete heat-preservation shed: the support bracket is arranged on the heat preservation shed upright post, the support base plate is arranged on the support bracket, the warm air blower placing cross beam is arranged on the support base plate, the warm air blower base plate is arranged on the upper portion of the warm air blower placing cross beam, the warm air blower is arranged on the warm air blower base plate, two ends of the color steel tile ceiling are connected to the top end of the heat preservation shed upright post, the heating system fixing I-shaped steel is arranged below the color steel tile ceiling, the heating system fixing I-shaped steel is provided with a heating system lifting hook, the heating system lifting hook is connected with a top heating system in a hanging mode, the top heating system is provided with a lifting sling, and the top heating system is controlled to lift through a top heating system control terminal;

10. installing a temporary channel of the loader: installing a loader channel in the heat insulation shed, wherein the loader channel comprises a channel bottom plate arranged at the lower part, channel trusses are arranged on the channel bottom plate, channel joist steel is arranged on the channel trusses, a channel inclined strut is arranged between every two adjacent channel trusses, and a channel plate is arranged on the top surface of the channel joist steel;

11. installation of the movable steel pipe frame heat preservation shed: the steel pipe is arranged inside the movable steel pipe heat preservation shed, the bottom of the movable steel pipe heat preservation shed is provided with a movable steel pipe heat preservation shed bottom plate, a pulley is rotatably arranged below the movable steel pipe heat preservation shed bottom plate, and a heat preservation curtain is movably arranged on the front side of the movable steel pipe heat preservation shed.

The invention has the beneficial effects that:

1. the utility model discloses a counterattack formula and weight formula combination system sand can improve system sand construction quality.

2. The buffer steel grids and the arc-shaped door of the discharge port are arranged in the coarse crushing workshop, so that the impact force of falling of the aggregate can be reduced, and the mud content of the aggregate can be effectively reduced.

3. Through adopting the reinforcing to easily change the reinforcing bar mesh screen, can improve the operating efficiency that the mesh screen was changed, simultaneously, this structure only needs to change inside wire net, the loss of reducible other materials to a certain extent.

4. The low-frequency vibrating screening technology of the vibrating screen with the optimized arrangement of the eccentric blocks and the stepped transition buffering technology of the vibrating screen are adopted, so that the production quality of aggregate can be ensured.

5. The mud content of the aggregate can be further reduced by arranging the washing equipment on the conveyor belt.

6. The aggregate transportation drop point optimization technology is adopted in the material transportation chute, so that the aggregate structure is not damaged in the transportation process after the production of the aggregates is finished, and the mud content of the aggregates leaving the factory is further ensured.

7. All around wall, ground, vertical, the top surface in ready-mixed concrete production storehouse all set up the heat preservation system, the temperature in the aggregate storehouse when fully guaranteeing concrete production.

8. The production heat preservation shed is provided with the push-pull type heat preservation door of the feeding port, so that the temperature in the heat preservation shed can be guaranteed to be stable when a transport vehicle enters and exits.

9. In order to ensure the condition of sudden increase of yield, one side of the heat preservation shed is provided with a movable steel pipe heat preservation shed.

10. In order to ensure the stable operation of the loader in the heat insulation shed, a loader traffic track is arranged in the heat insulation shed.

Drawings

FIG. 1 is a flow diagram of aggregate production;

FIG. 2 is a block diagram of a coarse crushing plant;

FIG. 3 is a basic block diagram of a counterattack crusher;

FIG. 4 is a schematic view of a reinforcing easy-to-replace steel mesh screen;

FIG. 5 is a view of the structure of the mesh screen holder for reinforcing the easy-to-replace steel mesh screen;

fig. 6 is a structure view of an easy-to-detach fixing plate of a mesh screen for reinforcing an easy-to-replace steel mesh screen;

FIG. 7 is a diagram of an intelligent control screening terminal;

FIG. 8 is a schematic view of a reaction crusher configuration;

FIG. 9 is a view showing the structure of a stone washing tank;

FIG. 10 is a schematic view of an aggregate optimized flushing structure

FIG. 11 is a schematic view of an aggregate ramp structure;

FIG. 12 is a schematic view of a ready-mix concrete insulated shelter;

FIG. 13 is a sectional view of a corbel structure of the thermal shed;

FIG. 14 is a three-dimensional view of a side insulation structure;

FIG. 15 is a schematic view of a top elevation type insulation structure;

FIG. 16 is a schematic view of the structure of the mobile steel-pipe insulation shed;

FIG. 17 is a three-dimensional block diagram of a loader traffic track;

FIG. 18 is a cross-sectional view of a loader rail;

fig. 19 is a schematic view showing the connection of the impact crusher, the undersize belt machine, and the vibrating screen.

Wherein: 1. sandstone 2, coarse crushing workshop 3, medium crushing workshop 4, secondary screening workshop 5, stone washing groove 6, impact crusher 7, buffer steel grid 8, superfine crushing workshop 9, rod mill workshop 10, multi-stage screening net 11, secondary screening net 12, aggregate 13, workshop upright post 14, feeding rubber belt machine 15, workshop cross beam 16, feeding chute 17, vibrating screen 18, screening hopper 19, screening hopper 20, screening rubber belt machine 21, discharge port arc door 22, steel bottom plate 23, angle iron inclined support 24, I-steel upright post 25, I-steel cross beam 26, foundation plate 27, guardrail 28, reinforced easy-to-replace steel bar mesh 29, mesh easy-to-replace steel bar mesh 30, mesh easy-to-replace fixed plate 31, preset screw 32, mesh screen frame 33, nut 34, weight crusher 35, intelligent control screening terminal 36, discharge port 37, intelligent control sensing device 38, first-level buffer steel bar fixed bolt 40, second-level buffer steel bar eccentric block 42, third-level steel bar buffer groove 43, stone washing base 44, intelligent control screening terminal 36, discharge port 37, intelligent control sensing device 38, first-level buffer steel bar fixed bolt 40, angle steel bar fixed plate 41, optimized eccentric block 42, third-level steel bar buffer iron buffer groove 43, and stone washing base 44 45. Pressure-adjustable water outlet nozzle 46, water gun 47, water gun side support 48, screen belt conveyor support 49, conveyor belt vertical support 50, conveyor belt diagonal support 51, flushing support vertical rod 52, flushing support cross beam 53, flushing device 54, stepped aggregate slow-falling zone 55, feeding chute 56, resilience slow-falling plate 57, resilience node 58, material conveying belt conveyor 59, thermal insulation shed bottom plate 60, bottom heating system 61, wall heating system 62, thermal insulation shed vertical column 63, thermal insulation shed side wall 64, push-pull thermal insulation door 65, warm air blower placing cross beam 66, warm air blower bottom plate 67, warm air blower fixing bolt 68, warm air blower 69, support bracket 70, support base plate 71, color steel tile ceiling 72, lifting sling 73, top heating system 74, heating system fixing I-steel 76, bracket stiffening plate 77, top heating system control terminal 78, movable steel pipe thermal insulation shed bottom plate 79, pulley 80, movable steel pipe thermal insulation shed 81, steel pipe 82, thermal insulation curtain 83, heating system fixing I-steel 75, heating system fixing I-steel 76, warm air blower placing cross beam 66, warm air blower placing plate 66, movable steel pipe thermal insulation shed bottom plate 80, warm air blower fixing bolt, warm-air blower fixing bolt 82, support plate supporting plate, steel pipe supporting plate 80, heat insulation shed 83, heat insulation system control terminal 78, heat insulation shed supporting plate supporting system fixing system, heat supporting system fixing system supporting Machine channel 84, channel plate 85, channel diagonal 86, channel I-steel 87, channel truss 88 and channel bottom plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

As shown in fig. 1 to 19, the invention provides an operation method of a production and screening system for ready-mixed concrete gravel aggregate, which comprises the following construction modes:

1. the design of a closed-circuit type multistage screening production system comprises the following steps: the closed-circuit type multi-stage screening production system comprises a coarse crushing workshop 2, a buffer steel grid 7, a middle crushing workshop 3, a second-stage screening net 11, a second-stage screening workshop 4, a stone washing tank 5, an impact crusher 6, a multi-stage screening net 10, an ultra-fine crushing workshop 8 and a rod mill workshop 9, wherein gravels 1 are sequentially produced and screened in each area of the closed-circuit type multi-stage screening production system to obtain aggregates 12.

Wherein, the crushing and grinding precision of the gravel 1 is gradually increased by the coarse crushing workshop 2, the middle crushing workshop 3, the impact crusher 6, the superfine crushing workshop 8 and the rod mill workshop 9, so that more refined aggregate 12 is obtained after the gravel 1 is produced through the areas.

Simultaneously, through the buffer profile steel net 7, second grade screening net 11, two sieve workshops 4, wash the grit groove 5, multistage screening net 10 that interpenetrate wherein, sieve grit 1 to the crushing and grinding in different regions to make the part impurity of not crushing and grinding completion screened off, increase the cooperation effect of crushing and grinding between each region.

2. The impact crusher 6 is optimized: the buffer angle steel is arranged in the impact crusher 6 and comprises a first-level buffer angle steel 38, a second-level buffer angle steel 40 and a third-level buffer angle steel 42 which are respectively arranged in the impact crusher 6, and the first-level buffer angle steel 38, the second-level buffer angle steel 40 and the third-level buffer angle steel 42 are sequentially connected into the impact crusher 6 through angle steel fixing bolts 39.

Wherein, the first-level buffer angle steel 38, the second-level buffer angle steel 40 and the third-level buffer angle steel 42 are distributed at intervals along the inside of the impact crusher 6.

3. Installing the foundation of the impact crusher 6: installing impact crusher 6 on the shaped steel basis, setting up I-steel stand 24 on steel bottom plate 22, setting up angle steel bracing 23 between I-steel stand 24, I-steel stand 24 top surface sets up I-steel crossbeam 25, foundatin plate 26 is connected in I-steel crossbeam 25 upside, and foundatin plate 26 sets up guardrail 27 all around, and one side of foundatin plate 26 sets up cat ladder 29.

Wherein, be provided with two at least angle steel bracing 23 between two adjacent I-steel stand 24, two at least angle steel bracing 23 are the setting of handing over to make angle steel bracing 23 one end connect in the top of one of them I-steel stand 24, the angle steel bracing 23 other end is connected in the bottom of another I-steel stand 24, in order to increase the stability between two adjacent I-steel stands 24.

In particular, a steel bottom plate 22, an angle steel inclined strut 23, an I-steel upright column 24, an I-steel cross beam 25, a foundation plate 26, a guardrail 27 and a ladder stand 29 are connected to form a steel section foundation.

4. Strengthen and easily change the installation of reinforcing bar mesh screen 28: wear to establish respectively to the different meshes of wire net with a plurality of screw rods 31 of predetermineeing of net reel 32 avris to make and predetermine screw rod 31 and carry out spacing fixed to the wire net, set up the easy removable fixed plate 30 of mesh screen on the wire net afterwards, the easy removable fixed plate 30 of mesh screen passes through the nut 33 after installing with net reel 32 and predetermines screw rod 31 and be connected fixedly.

It is worth mentioning, strengthen and easily change the installation of reinforcing bar mesh screen 28 and accomplish the back, the wire net is located between mesh screen readily removable fixed plate 30 and the mesh screen frame 32, and a plurality of screw rods 31 of predetermineeing pass behind the different meshes of wire net earlier, wear to establish the nut 33 position to on the mesh screen readily removable fixed plate 30 again, and screw up a plurality of nuts 33 one-to-ones and fix on a plurality of screw rods 31 of predetermineeing, make mesh screen readily removable fixed plate 30 and mesh screen frame 32 reciprocal anchorage, and carry out the centre gripping spacingly to the wire net of intermediate position.

5. And (3) installation in a screening workshop: install feeding sealing-tape machine 14 on the workshop crossbeam 15 of 2 topmost in coarse crushing workshop, feeding sealing-tape machine 14 bottom installation feeding chute 16, install shale shaker 17 under feeding chute 16, install buffer type steel grid 7 under the shale shaker 17, the shale shaker 17 front end sets up undersize funnel 18, the epaxial chute 19 of sieve 19 that is linked together with buffer type steel grid 7 is installed to the shale shaker 17 lower part, install undersize sealing-tape machine 20 under the upward chute 19 of sieve, set up weight breaker 34 under the undersize funnel 18, set up the ejection of compact machine under the weight breaker 34, installation discharge gate radial gate 21 in the ejection of compact machine.

It is worth mentioning that when the sandstone 1 enters the coarse crushing workshop 2 to be processed, the sandstone 1 is firstly conveyed by the feeding belt machine 14, after the feeding belt machine 14 conveys the sandstone 1 to a designated position, the sandstone 1 falls into the feeding chute 16 from the feeding belt machine 14 and slides downwards to the vibrating screen 17, the sandstone 1 is subjected to vibrating screening by the vibrating screen 17, the sandstone 1 meeting the particle size falls onto the buffer type steel grid 7 to be buffered midway during falling, then continuously slides downwards to the undersize belt machine 20 along the oversize chute 19, and the sandstone 1 meeting the particle size is conveyed by the undersize belt machine 20, while the sandstone 1 with larger particles screened out during vibrating screening by the vibrating screen 17 falls into the undersize hopper 18 from the vibrating screen 17 and falls into the heavy hammer crusher 34 along the undersize hopper 18 to be crushed, and then the sandstone 1 after being processed falls into the discharging machine, and taken out from the discharge port arc door 21.

Wherein, one end of the workshop cross beam 15 is connected to the workshop upright post 13, and the stable state of the workshop cross beam 15 is maintained through the workshop upright post 13.

6. Intelligent control screening terminal 35 installation: an intelligent control screening terminal 35 is arranged in the second screening workshop 4, and an intelligent control sensing device 37 is arranged below the discharge port 36.

Specially, intelligent control screening terminal 35 is connected with the communication of intelligent control induction system 37, when grit 1 via coarse crushing workshop 2, well garrulous workshop 3 from discharge gate 36 department when dropping to two sieve workshops 4 in, intelligent control induction system 37 can detect the process that drops of grit 1, and with information transmission to intelligent control screening terminal 35 department that detects, through the inside screening operation in two sieve workshops 4 of intelligent control screening terminal 35 unified control, follow-up washing operation in the stone washing groove 5 etc., so that increase the cooperation continuity between each step.

In an embodiment of the present disclosure, the intelligent control sensing device 37 is a laser detector, and the screening operation in the two-screen workshop 4 is performed by using the existing screening method.

7. Aggregate washing: wash stone groove base 43 one side and set up squirt fixed plate 44, set up two at least squirts 46 on the squirt fixed plate 44, squirt 46 tip sets up adjustable pressure faucet 45, and squirt 46 both sides set up squirt side support 47, and aggregate 12 is arranged in and is washed in washing stone groove 5, opens squirt 46 afterwards, adjusts the delivery pressure of adjustable pressure faucet 45 and washes aggregate 12 in washing stone groove 5 according to the requirement.

Wherein, grit 1 can form preliminary aggregate 12 after certain crushing, screening processing, and this part aggregate 12 falls into and washes in stone washing groove 5 after the inside screening operation in second sieve workshop 4.

8. Controlling the mud content of the aggregate: set up sub-sieve sealing-tape machine 20 under shale shaker 17, set up sub-sieve sealing-tape machine support 48 under the sub-sieve sealing-tape machine 20, sub-sieve sealing-tape machine 20 one side sets up the conveyer belt, set up conveyer belt vertical braces 49 under the conveyer belt, conveyer belt vertical braces 49 one side sets up conveyer belt bracing 50, conveyer belt upper portion sets up a plurality of support montants 51 that wash, a plurality of support montants 51 that wash set up between set up and wash support crossbeam 52, wash and set up on the support crossbeam 52 and wash equipment 53, wash according to the mud content of aggregate 12 when aggregate 12 conveys through the conveyer belt.

Wherein, aggregate 12 (namely gravel 1 after certain crushing and screening processes) that slides to minus sieve sealing-tape machine 20 along oversize chute 19 after vibrating screen 17 screens will convey and transport along with the conveyer belt, wash aggregate 12 through flushing device 53 in the conveying and transporting process simultaneously and get rid of mud.

Particularly, before the gravel 1 is added into the coarse crushing workshop 4, an operator detects the mud content of the gravel 1 and adjusts the water outlet amount of the flushing device 53 according to the mud content, so that waste caused by excessive water outlet is avoided, and the effect of flushing the aggregate 12 to remove the mud is also ensured; wherein the flushing device 53 employs a flushing nozzle.

9. Mounting the ready-mixed concrete heat-preservation shed: the supporting bracket 69 is mounted on the heat-insulating shed upright post 62, a bracket stiffening plate 76 connected with the supporting bracket 69 is arranged on the heat-insulating shed upright post 62, a supporting cushion plate 70 is arranged on the supporting bracket 69, a fan heater placing cross beam 65 is arranged on the supporting cushion plate 70, a fan heater bottom plate 66 is arranged on the upper portion of the fan heater placing cross beam 65, a fan heater 68 is mounted on the fan heater bottom plate 66, the fan heater bottom plate 66 and the fan heater 68 are connected through a fan heater fixing bolt 67, two ends of a color steel tile ceiling 71 are connected to the top end of the heat-insulating shed upright post 62, a heating system fixing I-shaped steel 75 is arranged below the color steel tile ceiling 71, a heating system lifting hook 74 is arranged on the heating system fixing I-shaped steel 75, the heating system lifting hook 74 is connected with a top heating system 73 in a hanging manner, a lifting sling 72 is arranged on the top heating system 73, and the top heating system 73 is controlled to lift through a top heating system control terminal 77.

In an embodiment of the present disclosure, the lifting sling 72 is disposed on a heating system fixing i-steel 75 in a penetrating manner, and the top end of the lifting sling 72 is fixedly connected to the color steel tile ceiling 71, a moving roller is disposed in the heating system fixing i-steel 75, two adjacent moving rollers are disposed on two sides of the lifting sling 72, so that the two adjacent moving rollers clamp the lifting sling 72, when the top heating system control terminal 77 controls a motor connected to the moving rollers, the moving rollers start to rotate relative to the heating system fixing i-steel 75, and the rotating moving rollers drive the heating system fixing i-steel 75 to move up and down along the lifting sling 72, so as to drive the heating system hook 74 and the top heating system 73 to move up and down, thereby adjusting the height of the top heating system 73, so as to control the heating temperature, the heating height, and the like.

Wherein the top heating system 73 employs a heating tube.

10. Mounting a temporary channel of the loader: a loader channel 83 is installed in the heat insulation shed, the loader channel 83 comprises a channel bottom plate 88 arranged at the lower portion, channel trusses 87 are arranged on the channel bottom plate 88, channel H-shaped steel 86 are arranged on the channel trusses 87, a channel inclined strut 85 is arranged between every two adjacent channel trusses 87, and a channel plate 84 is arranged on the top face of each channel H-shaped steel 86.

11. Installation of the movable steel pipe frame heat preservation shed: a steel pipe 81 is arranged in the movable steel pipe heat preservation shed 80, a movable steel pipe heat preservation shed bottom plate 78 is arranged at the bottom of the movable steel pipe heat preservation shed, a pulley 79 is rotatably arranged below the movable steel pipe heat preservation shed bottom plate 78, and a heat preservation curtain 82 is movably arranged on the front side of the movable steel pipe heat preservation shed 80.

The invention also discloses a screening system for producing the premixed concrete gravel aggregate, which comprises gravel 1, a coarse crushing workshop 2, a middle crushing workshop 3, an impact crusher 6, an undersize belt conveyor 20, a vibrating screen 17, an intelligent control sensing device 37, a heat preservation shed and a top heating system 73 which are sequentially arranged, wherein the aggregate is produced by adopting a closed-circuit multi-stage screening production system, the screening workshop is provided with a reinforced easily-replaceable steel mesh screen 28, the lower side of the impact crusher 6 is provided with a profile steel foundation, the impact crusher 6 is internally provided with a material-buffering angle steel, and the concrete is premixed by adopting a combined heat preservation shed.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.

Claims (8)

1. An operation method of a premixed concrete sandstone aggregate production screening system is characterized by comprising the following steps:

1. the design of a closed-circuit type multistage screening production system comprises the following steps: the closed-circuit type multi-stage screening production system comprises a coarse crushing workshop (2), a buffer steel grid (7), a middle crushing workshop (3), a secondary screening net (11), a secondary screening workshop (4), a stone washing tank (5), an impact crusher (6), a multi-stage screening net (10), a superfine crushing workshop (8) and a rod mill workshop (9), wherein gravels (1) are sequentially produced and screened in each area of the closed-circuit type multi-stage screening production system to obtain aggregates (12);

2. optimization of the impact crusher (6): the method comprises the following steps of placing buffering angle steel in an impact crusher (6), wherein the buffering angle steel comprises a first-level buffering angle steel (38), a second-level buffering angle steel (40) and a third-level buffering angle steel (42) which are respectively installed in the impact crusher (6), and sequentially connecting the first-level buffering angle steel (38), the second-level buffering angle steel (40) and the third-level buffering angle steel (42) to the interior of the impact crusher (6) through angle steel fixing bolts (39);

3. installing a foundation of the impact crusher (6): installing a counterattack crusher (6) on a profile steel foundation, arranging I-shaped steel stand columns (24) on a steel base plate (22), arranging angle steel inclined struts (23) between the I-shaped steel stand columns (24), arranging I-shaped steel cross beams (25) on the top surfaces of the I-shaped steel stand columns (24), connecting a foundation plate (26) to the upper sides of the I-shaped steel cross beams (25), arranging guardrails (27) on the periphery of the foundation plate (26), and arranging a ladder stand (29) on one side of the foundation plate (26);

4. strengthen and easily change reinforcing bar mesh screen (28) installation: a plurality of preset screws (31) on the side of a net screen frame (32) are respectively penetrated into different meshes of a steel wire net, and then a net screen easy-to-detach fixing plate (30) is arranged on the steel wire net;

5. and (3) installation in a screening workshop: a feeding adhesive tape machine (14) is mounted on a workshop cross beam (15) at the uppermost end of a coarse crushing workshop (2), a feeding chute (16) is mounted at the bottom of the feeding adhesive tape machine (14), a vibrating screen (17) is mounted below the feeding chute (16), a buffer type steel grid (7) is mounted below the vibrating screen (17), a screen down funnel (18) is arranged at the front end of the vibrating screen (17), an screen up chute (19) communicated with the buffer type steel grid (7) is mounted at the lower part of the vibrating screen (17), a screen down adhesive tape machine (20) is mounted below the screen up chute (19), a heavy hammer crusher (34) is arranged below the screen down funnel (18), a discharging machine is arranged below the crusher (34), and a discharge port arc-shaped door (21) is mounted in the discharging machine;

6. the intelligent control screening terminal (35) is installed: an intelligent control screening terminal (35) is arranged in the second screening workshop (4), and an intelligent control sensing device (37) is arranged below the discharge port (36);

7. washing aggregate: a water gun fixing plate (44) is arranged on one side of the stone washing groove base (43), at least two water guns (46) are arranged on the water gun fixing plate (44), pressure-adjustable water nozzles (45) are arranged at the end parts of the water guns (46), water gun side brackets (47) are arranged on two sides of each water gun (46), then the water guns (46) are opened, and aggregates (12) in the stone washing groove (5) are washed;

8. controlling the mud content of the aggregate: arranging an undersize adhesive tape machine (20) below a vibrating screen (17), arranging an undersize adhesive tape machine support (48) below the undersize adhesive tape machine (20), arranging a conveying belt on one side of the undersize adhesive tape machine (20), arranging a plurality of washing support vertical rods (51) on the upper part of the conveying belt, arranging washing support cross beams (52) among the washing support vertical rods (51), arranging washing equipment (53) on the washing support cross beams (52), and washing aggregate (12) when being conveyed by the conveying belt;

9. mounting the ready-mixed concrete heat-preservation shed: the method comprises the following steps that a supporting bracket (69) is installed on a heat preservation shed stand column (62), a supporting base plate (70) is arranged on the supporting bracket (69), a fan heater placing beam (65) is arranged on the supporting base plate (70), a fan heater base plate (66) is arranged on the upper portion of the fan heater placing beam (65), a fan heater (68) is installed on the fan heater base plate (66), two ends of a color steel tile ceiling (71) are connected to the top end of the heat preservation shed stand column (62), a heating system fixing I-shaped steel (75) is arranged below the color steel tile ceiling (71), a heating system lifting hook (74) is arranged on the heating system fixing I-shaped steel (75), the heating system lifting hook (74) is connected with a top heating system (73) in a hanging mode, a lifting sling (72) is arranged on the top heating system (73), and the top heating system (73) is controlled to lift through a top heating system control terminal (77);

10. mounting a temporary channel of the loader: a loader channel (83) is installed in the heat insulation shed, the loader channel (83) comprises a channel bottom plate (88) arranged at the lower part, channel trusses (87) are arranged on the channel bottom plate (88), channel I-shaped steel (86) is arranged on the channel trusses (87), a channel diagonal brace (85) is arranged between every two adjacent channel trusses (87), and a channel plate (84) is arranged on the top surface of each channel I-shaped steel (86);

11. installation of the movable steel pipe frame heat preservation shed: the steel pipe (81) is arranged in the movable steel pipe heat preservation shed (80), the movable steel pipe heat preservation shed bottom plate (78) is arranged at the bottom, the pulley (79) is rotatably arranged below the movable steel pipe heat preservation shed bottom plate (78), and the heat preservation curtain (82) is movably arranged on the front side of the movable steel pipe heat preservation shed (80).

2. The method of operating a ready mixed concrete gravel aggregate production screening system of claim 1, wherein: the first-level buffer angle steel (38), the second-level buffer angle steel (40) and the third-level buffer angle steel (42) are distributed at intervals along the inside of the impact crusher (6).

3. The method of operating a ready mixed concrete gravel aggregate production screening system of claim 1, wherein: at least two angle steel inclined struts (23) are arranged between every two adjacent I-shaped steel stand columns (24), the at least two angle steel inclined struts (23) are arranged in a crossed mode, one end of each angle steel inclined strut (23) is connected to the top end of one of the I-shaped steel stand columns (24), and the other end of each angle steel inclined strut (23) is connected to the bottom end of the other I-shaped steel stand column (24).

4. The method of operating a ready mixed concrete gravel aggregate production screening system of claim 1, wherein: the mesh screen easy-to-detach fixing plate (30) and the mesh screen frame (32) are fixedly connected with the preset screw rod (31) through a screw cap (33) after being installed.

5. The method of operating a ready mixed concrete gravel aggregate production screening system of claim 1, wherein: the intelligent control screening terminal (35) is in communication connection with the intelligent control sensing device (37).

6. The method of operating a ready mixed concrete gravel aggregate production screening system of claim 1, wherein: a conveyor belt vertical support (49) is arranged below the conveyor belt, and a conveyor belt inclined support (50) is arranged on one side of the conveyor belt vertical support (49).

7. The method of operating a ready mixed concrete gravel aggregate production screening system of claim 1, wherein: bracket stiffening plates (76) connected with the support brackets (69) are arranged on the heat preservation shed upright columns (62), and the fan heater base plate (66) and the fan heater (68) are connected through fan heater fixing bolts (67).

8. The utility model provides a premixed concrete grit aggregate production screening system which characterized in that: obtained by a method of operating a ready mixed concrete sand aggregate production screening system as claimed in any one of claims 1 to 7.

Images