CN107217571B - Anti-icing asphalt concrete additive feeding device and additive mixing method - Google Patents
Anti-icing asphalt concrete additive feeding device and additive mixing method Download PDFInfo
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- CN107217571B CN107217571B CN201710459652.5A CN201710459652A CN107217571B CN 107217571 B CN107217571 B CN 107217571B CN 201710459652 A CN201710459652 A CN 201710459652A CN 107217571 B CN107217571 B CN 107217571B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
- E01C19/1068—Supplying or proportioning the ingredients
- E01C19/1072—Supplying or proportioning the ingredients the solid ingredients
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1009—Plant wherein type or construction of the mixer are irrelevant
Abstract
The invention discloses an anti-icing asphalt concrete additive feeding device which comprises a frame type building body, wherein more than five layers of working platforms are arranged on the building body from bottom to top, a dust removal box is arranged on one side of the building body, and an additive is stored at the top of the dust removal box; a forced stirring tank is arranged in the building body; the front side of the building body between the third layer of working platform and the fourth layer of working platform is fixedly connected with a material storage tank and a feeding tank, the capacity of the feeding tank is the same as the designed additive one-time feeding amount, and the bottom of the feeding tank is communicated with a forced stirring tank downwards through a feeding pipe; the top of the storage tank is connected with a horn-shaped feeding port. The invention also discloses an additive mixing method for the asphalt concrete mixing plant. By adopting the structure and the method, the damage rate of the Limei is not too high in the conveying and stirring processes, the using amount of the Limei is reduced, the cost is greatly saved, and the Limei mixing tower is convenient to reform on the basis of the conventional asphalt concrete mixing tower.
Description
Technical Field
The invention relates to the technical field of construction, in particular to a feeding device and a mixing method for an asphalt concrete additive.
Background
With the development of economic society, infrastructure construction plays an increasingly important role in economic life in China. Asphalt concrete mixing plants are often required in infrastructure construction. A large amount of dust can be generated in the asphalt concrete mixing operation, so that most of the existing asphalt concrete mixing plants are connected with a matched dust removal box.
In the asphalt concrete mixing operation, the main materials (such as stones) are lifted to the upper part of an asphalt concrete mixing plant through a lifting device and are put into a forced intermittent mixing cylinder. And a spiral conveying device for conveying the materials heated by the roller to the top of the asphalt concrete mixing plant from the ground is arranged on one side of the asphalt concrete mixing plant. The mixture enters the forced mixing tank from the upper part of the asphalt concrete mixing plant for mixing, after being uniformly mixed, the material uniformly mixed flows out from the discharge port by opening the discharge valve arranged at the discharge port at the bottom of the forced mixing tank.
Asphalt concrete is a main raw material for building pavements, and along with the development of technologies, the requirements on the performance of asphalt concrete are higher and higher.
The road surface is frozen, which can bring great influence to traffic. On one hand, the friction coefficient of the vehicle to the road surface is greatly reduced after the vehicle is frozen, the accident rate is increased due to the vehicle slipping, and the life health and property safety of people are harmed; on the other hand, in order to prevent the vehicle from skidding, the speed of the vehicle is very slow on the icy road, and the phenomenon of unsmooth traffic is increased. Therefore, the anti-icing technology of the road surface becomes a research hotspot problem.
At present, the treatment methods for inhibiting road ice and snow which are commonly used at home and abroad are generally divided into two major types, namely a passive type and an active type. In the passive method, the most widely used method is to spread a snow melting agent on the road after snowing to accelerate the melting of the snow and ice. The passive method can only be processed after the ice and snow condition appears on the road surface, only the time of the adverse effect of the ice and snow on the traffic is shortened, on one hand, the active ice prevention can not be achieved all the time, on the other hand, a large amount of manpower and material resources are needed for implementing the passive method for inhibiting the ice and snow on the road surface, and the cost is very high.
The Limei is a road surface anti-icing material obtained by mixing and reacting calcium chloride with hydrophobic grease and carrying out chemical process treatment, at present, the asphalt admixture is used as an additive of asphalt concrete in the construction field and is in a granular shape.
When in use, the road beauty is added into the asphalt mixture for the upper surface layer of the asphalt pavement, the road beauty is quickly activated under the condition of low temperature, and road beauty components in the asphalt pavement are separated out by utilizing the osmotic pressure and capillary phenomenon and the friction action of running vehicles, so that the freezing point of the pavement is lowered, the pavement is prevented from being frozen, and the ice formation can be effectively prevented when the temperature of the pavement is above-20 ℃.
The Lulimei as a novel asphalt concrete additive has high cost, and the cost of one ton of Lulimei material is 7-8 ten thousand yuan at present. The use of the laimei as an additive for asphalt concrete requires the addition of the laimei to the mixing tank of an asphalt concrete mixing plant. In the conventional method, a screw conveying device which is inherent to one side of an asphalt concrete mixing plant is used for conveying the road beauty from the ground to the upper part of the asphalt concrete mixing plant, and then the road beauty is added into a forced stirring cylinder to be uniformly stirred with various raw materials of asphalt concrete.
This prior art has the following drawbacks:
1. when the screw conveyer conveys the laimei upwards, a large amount of laimei particles are broken, so that the efficiency of the laimei raw material per unit weight is reduced, the dosage of the laimei is forced to be increased, and the cost is increased.
2. During the stirring in the forced stirring tank, the beautiful material is damaged to some extent. This also forces a greater proportion of the road beauty material to be used in asphalt concrete, increasing costs.
In the stirring process, uniform stirring needs to be ensured, and the raw materials such as the Roume, the pebbles and the like are wrapped by the asphalt. The stirring time of the laimei in the forced stirring cylinder is too short, so that the uniform stirring cannot be ensured, and the asphalt in the mixture can not wrap the laimei material. If the stirring time is too long, the breakage rate of the road is too high.
3. Because of the damage to some extent that occurs during transportation and mixing of the religious material, people are forced to use a greater proportion of the religious material in the asphalt concrete, which generally compresses the amount of ore fines in the asphalt mixture, reduces the content of ore fines to less than 2.5%, which also affects the overall performance of the asphalt concrete.
4. The inventor of the present patent application, through creative thinking and experiments, discovered a defect that the prior art is not found by the person skilled in the art, thereby providing an explanation for the honeycomb shape of the anti-icing road surface after being used for a period of time.
In the field of construction technology, it is known that properties such as pavement strength of the anti-icing asphalt concrete immediately after construction meet the requirements of construction specifications after the use of the road beauty material. However, after the anti-icing road surface is used for a short period of time, the anti-icing road surface is cellular, the strength of the road surface is reduced, and the road surface does not accord with the requirement of construction specifications any more. But the construction section often passes the acceptance at this time.
The defects which are not found in the prior art and are found for the first time by the inventor of the present patent application are: the porosity of the common dense-graded asphalt mixture is 4-6%, and the porosity of the asphalt mixture is increased by about 1-2% after the addition of the Limei, so that the porosity is often over 6%, and the Limei is large in addition amount and can be dissolved when meeting water, so that the Limei on the upper layer of the pavement is dissolved by water sources such as rainwater after the pavement is constructed for a period of time, the pavement is in a honeycomb shape, and the strength of the pavement is reduced.
Disclosure of Invention
The invention aims to provide an anti-icing asphalt concrete admixture feeding device which can avoid or reduce raw material damage caused by spiral conveying and forced stirring at low cost.
In order to achieve the purpose, the anti-icing asphalt concrete additive feeding device comprises a frame type building body, wherein more than five working platforms are arranged on the building body from bottom to top, a dust removal box is arranged on one side of the building body, the top of the dust removal box is flush with the fourth working platform of the building body, and an additive to be fed is stored at the top of the dust removal box; a forced stirring tank is arranged in the building body, the bottom end of the forced stirring tank is provided with a discharge opening, and a discharge electromagnetic valve is arranged at the discharge opening; the upper part of the forced stirring tank is provided with a feed inlet;
the front side of the building body between the third layer of working platform and the fourth layer of working platform is fixedly connected with a material storage tank and a feeding tank, the capacity of the feeding tank is the same as the designed additive one-time feeding amount, the capacity of the material storage tank is two to four times of that of the feeding tank, the material storage tank is positioned right above the feeding tank and is connected with the feeding tank through a connecting pipe, and a weighing device and a connecting electromagnetic valve are arranged on the connecting pipe; the bottom of the feeding tank is connected with a feeding pipe through a feeding electromagnetic valve, and the feeding pipe is downwards communicated with the forced stirring tank;
the top of the material storage tank is connected with a horn-shaped feeding port with a large upper part and a small lower part, and the top opening of the feeding port is arranged on the fourth layer of working platform and is flush with the fourth layer of working platform;
the weighing device, the feeding electromagnetic valve and the discharging electromagnetic valve are all connected with an electric control device.
The electric control device is a PLC or a single chip microcomputer or an integrated circuit.
A feeding port is formed in the top of the feeding tank, and the connecting pipe is connected with the feeding port;
the feeding tank is provided with a forced feeding device, the forced feeding device comprises a material pressing box which is horizontally arranged in the feeding tank and is in sliding connection with the side wall of the feeding tank, the interior of the material pressing box is provided with a through blanking hole, the material pressing box at the opening at the upper end of the blanking hole is connected with a material receiving hopper, and the top of the material receiving hopper is correspondingly connected with a material inlet of the feeding tank when the material pressing box is positioned at an upper limit position;
the top of the feeding tank is connected with two material pressing cylinders which are arranged in bilateral symmetry, and extension rods of the two material pressing cylinders are downwards connected with the material pressing tank; a cylinder for plugging holes is fixedly connected in the material pressing box, an extension rod of the cylinder for plugging holes is connected with a plugging block, the plugging block is larger than the blanking hole, the upper surface of the plugging block is in sliding connection with the top wall of the material pressing box, and the lower surface of the plugging block is in sliding connection with the bottom wall of the material pressing box; when the extension rod of the cylinder for plugging the hole extends, the plug blocks the blanking hole, and when the extension rod of the cylinder for plugging the hole is retracted, the plug blocks leave the blanking hole.
The invention also discloses an additive mixing method using the anti-icing asphalt concrete additive feeding device, which is sequentially carried out according to the following steps:
the first step is to store 4 tons of the admixture on the top of the dust removal box by using a hoisting device;
starting a forced stirring tank, putting main materials of the anti-icing asphalt concrete into the forced stirring tank from a feeding port by using a hoisting device, manually conveying the additive on the top of the dust removal box to a fourth-layer working platform, and putting the additive into a storage tank through the feeding port until the storage tank and the feeding tank are filled with the additive;
starting a hole plugging cylinder and a material pressing cylinder 9 seconds before the expiration of a primary stirring period, wherein the hole plugging cylinder drives a plugging block to plug a blanking hole, a material pressing box moves downwards under the driving of the material pressing cylinder, and additives in a feeding tank are forced out within 1 second; then the material pressing cylinder drives the material pressing box to reset upwards, and finally the connecting electromagnetic valve is opened, so that the additive in the material storage tank enters the material feeding tank through the connecting pipe and the weighing device; when the weighing device measures that the weight of the falling material reaches the set primary feeding amount, a signal is sent to the electric control device, and the electric control device closes the electromagnetic valve;
the fourth step is that after the additive is put in for 8 seconds, the forced stirring tank is controlled to stop stirring, and the discharging electromagnetic valve is opened to enable the uniformly stirred mixture to flow out of the forced stirring tank downwards;
and circularly performing the third step and the fourth step to realize the connection stirring operation.
In the process of circularly performing the third step and the fourth step, when the amount of the additive at the top of the dust removing box is less than 500 kg, a hoisting device is used for supplementing the additive to the top of the dust removing box; when the additive in the storage tank is less than the set one-time feeding amount, the additive is fed into the storage tank through the feeding port until the storage tank is filled with the additive.
The invention has simple structure, is convenient to reform on the basis of the prior asphalt concrete mixing plant, and has lower reformation cost. In the process of development, the invention firstly thinks of not the technical scheme in the application, but two other modification schemes. The first modification is to put the additive (laimei) on the ground, and this modification needs to remove the existing crushing device and modify the 5 ton tank, which costs at least 5 ten thousand yuan modification cost. The second transformation scheme is to throw materials on the third layer of working platform of the asphalt concrete mixing plant, install the chute and the electric door, but just so need build the material storage platform on the third layer of working platform, and the transformation cost itself needs 4 ten thousand yuan. By adopting the structure of the invention, the top of the existing dust removal box is used as a material storage platform, and the material storage platform is not required to be additionally built; storage tank and feeding tank are existing equipment, only need install tubaeform dog-house additional between storage tank and fourth floor work platform to the installation on feeding tank force throw the material device can, the transformation expense only needs 5000 yuan, can realize reducing cost and improving effect on the basis that need not to change existing equipment.
By adopting the structure and the method, the additive (the Limei) is not required to be conveyed by a spiral conveying device, so that the additive is prevented from being damaged in the conveying process, the using amount of the Limei is reduced, and the cost is saved.
If no forced feeding device is arranged, the natural blanking time of the Limei is longer, and the existing device needs to stir and crush the raw materials in the transportation and feeding processes of the existing feeding device, which is contradictory to the requirement that the additive Limei does not achieve crushing. After the additive is fed into a forced stirring tank, if the stirring time is less than 8 seconds, the additive is difficult to stir uniformly, and asphalt in the mixture cannot wrap the additive completely, so that the performance of a pavement paved by the mixture is influenced. The longer the mixing time, especially after the mixing time exceeds 9 seconds, the breakage rate of the laimei in the forced mixing tank will be greatly increased, reducing the function of the laimei, so that people are forced to add more laimei in the mixture. The person skilled in the art has no conscious knowledge of this and in particular no suitable means of ensuring that the mixing time of the lorimes in the forced mixing tank is in the appropriate interval.
More Lulimei is added, so that on one hand, the cost is increased, and on the other hand, the content of mineral powder in the mixture is reduced, and the overall performance of the asphalt concrete is adversely affected. Based on the new knowledge, the inventor creatively develops a forced feeding device, and the feeding time is reduced to be less than 1 second, and meanwhile, the feeding of a feeding tank is not influenced. If the feeding time cannot be compressed, the breakage rate of the road beauty can be improved. For example, if the charging time is 4 seconds, in order to ensure that all the laimei is wrapped by the asphalt, the stirring must be continued for 8 seconds after the charging is finished, and for the laimei entering the forced stirring tank within the first second of charging, the stirring time in the forced stirring tank actually reaches 12 seconds, so that the breakage rate is very high.
By adopting the structure and the method, the feeding time is reduced within 1 second, so that the road beauty is ensured to be wrapped by the asphalt, and the overhigh breakage rate of the road beauty caused by overlong stirring time is prevented.
In a word, the structure and the method of the invention ensure that the damage rate of the Lulimei is not too high in the conveying and stirring process, reduce the dosage of the Lulimei, do not need to compress the content of mineral powder in the asphalt mixture, greatly save the cost, facilitate the reconstruction on the basis of the existing asphalt concrete mixing plant, and provide a foundation for the overall formula of the asphalt concrete to be more uniform and reasonable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of a forced feeding device at a feeding tank.
Detailed Description
As shown in fig. 1 and fig. 2, the anti-icing asphalt concrete admixture feeding device comprises a frame type building 1, wherein more than five working platforms 2 are arranged on the building 1 from bottom to top, a dust removal box 3 is arranged on one side of the building 1, the top of the dust removal box 3 is flush with the fourth working platform 2 of the building 1, and an admixture to be fed is stored at the top of the dust removal box 3; a forced stirring tank 4 is arranged in the building body 1, a discharge opening 5 is arranged at the bottom end of the forced stirring tank 4, and a discharge electromagnetic valve 13 is arranged at the discharge opening 5; the upper part of the forced stirring tank 4 is provided with a feed inlet 6; for materials with different particle sizes, the materials can be fed into the forced stirring tank 4 through feed inlets 6 arranged on different floors.
The building body 1 front side fixedly connected with storage tank 7 and throw material jar 8 between third floor work platform 2 and the fourth floor work platform 2, throw the material jar 8 the capacity and throw the volume once the same with the admixture of design, the capacity of storage tank 7 throws material jar 8 two to four times (preferred triple), in this embodiment, storage tank 7 capacity is 600 kilograms, throw the material jar 8 the capacity of 200 kilograms, the volume of throwing the volume of design once is 200 kilograms.
The material storage tank 7 is positioned right above the feeding tank 8 and is connected with the feeding tank through a connecting pipe 9, and a weighing device and a connecting electromagnetic valve are arranged on the connecting pipe 9; the bottom of the feeding tank 8 is connected with a feeding pipe 12 through a feeding electromagnetic valve 11, and the feeding pipe 12 is downwards communicated with the forced stirring tank 4; the weighing device and the connecting solenoid valve are both conventional devices and are not shown for reasons of breadth.
The top of the material storage tank 7 is connected with a horn-shaped feeding port 10 with a large upper part and a small lower part, and the top opening of the feeding port 10 is arranged on the fourth layer of working platform 2 and is flush with the fourth layer of working platform 2;
the weighing device, the feeding electromagnetic valve 11 and the discharging electromagnetic valve 13 are all connected with an electric control device.
The electric control device is a PLC or a single chip microcomputer or an integrated circuit, both of which belong to the prior art, and is not shown in the figure.
A feeding port 14 is formed in the top of the feeding tank 8, and the connecting pipe 9 is connected with the feeding port 14;
a forced feeding device is arranged on the feeding tank 8 and comprises a material pressing box 21 which is horizontally arranged in the feeding tank 8 and is in sliding connection with the side wall of the feeding tank 8, a through material dropping hole 22 is formed in the middle of the material pressing box 21, the material pressing box 21 at the opening at the upper end of the material dropping hole 22 is connected with a material receiving hopper 23, and the top of the material receiving hopper 23 is correspondingly connected with the material inlet 14 of the feeding tank 8 when the material pressing box 21 is positioned at the upper limit position;
the top of the feeding tank 8 is connected with two material pressing cylinders 24, the two material pressing cylinders 24 are arranged in bilateral symmetry, and extension rods of the two material pressing cylinders 24 are downwards connected with the material pressing box 21; a cylinder 25 for plugging holes is fixedly connected in the material pressing box 21, an extension rod of the cylinder 25 for plugging holes is connected with a plugging block 26, the plugging block 26 is larger than the blanking hole 22, the upper surface of the plugging block 26 is slidably connected with the top wall of the material pressing box 21, and the lower surface of the plugging block 26 is slidably connected with the bottom wall of the material pressing box 21; when the extension rod of the cylinder 25 for blocking the hole extends, the blocking block 26 blocks the blanking hole 22, and when the extension rod of the cylinder 25 for blocking the hole retracts, the blocking block 26 leaves the blanking hole 22.
The part of the head box 21 outside the stroke of the clogs 26 is filled with a filler 27. The material pressing cylinder 24 and the hole plugging cylinder 25 are respectively connected with the electric control device. The filler 27 can prevent the admixture from entering and filling the head box 21.
The invention also discloses an additive mixing method of the anti-icing asphalt concrete additive feeding device, which is sequentially carried out according to the following steps:
the first step is to store 4 tons of the admixture on the top of the dust removal box 3 by using a hoisting device;
the second step is to start the forced stirring tank 4, use the hoisting device to throw in the major ingredients (including graded mineral aggregate and asphalt) of the anti-icing asphalt concrete from each layer of charging opening 6, manually transport the admixture on the top of the dust removal box 3 to the fourth layer of working platform 2, then throw the admixture into the storage tank 7 through the charging opening 10 until the storage tank 7 and the charging tank 8 are filled with the admixture;
the third step is that 9 seconds before the expiration of one stirring period, the hole-plugging cylinder 25 and the material-pressing cylinder 24 are started, the hole-plugging cylinder 25 drives the plugging block 26 to plug the blanking hole 22, the material-pressing box 21 moves downwards under the drive of the material-pressing cylinder 24, and the additive in the material-feeding tank 8 is forced out within 1 second; then the material pressing cylinder 24 drives the material pressing box 21 to reset upwards, and finally the connecting electromagnetic valve is opened, so that the additive in the material storage tank 7 enters the material feeding tank 8 through the connecting pipe 9 and the weighing device; when the weight of the falling material reaches the set primary feeding amount, the weighing device sends a signal to the electric control device, and the electric control device closes the electromagnetic valve; the feed tank 8 is not a sealed tank.
The fourth step is that after the additive is put in for 8 seconds, the forced stirring tank 4 is controlled to stop stirring, and the discharging electromagnetic valve 13 is opened to enable the uniformly stirred mixture to flow out of the forced stirring tank 4 downwards;
and circularly performing the third step and the fourth step to realize the connection stirring operation.
In the process of circularly performing the third step and the fourth step, when the amount of the additive on the top of the dust removal box 3 is less than 500 kg, the additive is supplemented to the top of the dust removal box 3 by using a hoisting device; when the additive in the storage tank 7 is less than the set one-time feeding amount, the additive is fed into the storage tank 7 through the feeding port 10 until the storage tank 7 is filled with the additive. In this example, the additive was a ledum product produced by ledum anti-icing pavement limited, switzerland.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (3)
1. Anti-icing asphalt concrete admixture throws material device, its characterized in that: the building comprises a frame type building body, wherein more than five layers of working platforms are arranged on the building body from bottom to top, a dust removal box is arranged on one side of the building body, the top of the dust removal box is flush with the fourth layer of working platform of the building body, and an additive to be fed is stored at the top of the dust removal box; a forced stirring tank is arranged in the building body, the bottom end of the forced stirring tank is provided with a discharge opening, and a discharge electromagnetic valve is arranged at the discharge opening; the upper part of the forced stirring tank is provided with a feed inlet;
the front side of the building body between the third layer of working platform and the fourth layer of working platform is fixedly connected with a material storage tank and a feeding tank, the capacity of the feeding tank is the same as the designed additive one-time feeding amount, the capacity of the material storage tank is two to four times of that of the feeding tank, the material storage tank is positioned right above the feeding tank and is connected with the feeding tank through a connecting pipe, and a weighing device and a connecting electromagnetic valve are arranged on the connecting pipe; the bottom of the feeding tank is connected with a feeding pipe through a feeding electromagnetic valve, and the feeding pipe is downwards communicated with the forced stirring tank;
the top of the material storage tank is connected with a horn-shaped feeding port with a large upper part and a small lower part, and the top opening of the feeding port is arranged on the fourth layer of working platform and is flush with the fourth layer of working platform;
the weighing device, the feeding electromagnetic valve and the discharging electromagnetic valve are all connected with an electric control device;
a feeding port is formed in the top of the feeding tank, and the connecting pipe is connected with the feeding port;
the feeding tank is provided with a forced feeding device, the forced feeding device comprises a material pressing box which is horizontally arranged in the feeding tank and is in sliding connection with the side wall of the feeding tank, the interior of the material pressing box is provided with a through blanking hole, the material pressing box at the opening at the upper end of the blanking hole is connected with a material receiving hopper, and the top of the material receiving hopper is correspondingly connected with a material inlet of the feeding tank when the material pressing box is positioned at an upper limit position;
the top of the feeding tank is connected with two material pressing cylinders which are arranged in bilateral symmetry, and extension rods of the two material pressing cylinders are downwards connected with the material pressing tank; a cylinder for blocking the hole is fixedly connected in the material pressing box, an extension rod of the cylinder for blocking the hole is connected with a blocking block, the blocking block is larger than the blanking hole, the upper surface of the blocking block is in sliding connection with the top wall of the material pressing box, and the lower surface of the blocking block is in sliding connection with the bottom wall of the material pressing box; when the extension rod of the cylinder for plugging the hole extends, the plugging block plugs the blanking hole, and when the extension rod of the cylinder for plugging the hole is retracted, the plugging block leaves the blanking hole.
2. The admixture mixing method using the anti-icing asphalt concrete admixture feeding device of claim 1 is characterized by comprising the following steps in sequence:
the first step is to store 4 tons of the admixture on the top of the dust removal box by using a hoisting device;
starting a forced stirring tank, using a hoisting device to throw main materials of the anti-icing asphalt concrete into the forced stirring tank from a feed opening, manually conveying the additive on the top of the dust removing box onto a fourth layer of working platform, and then throwing the additive into a storage tank through the feed opening until the storage tank and a feed tank are filled with the additive;
starting a hole plugging cylinder and a material pressing cylinder 9 seconds before the expiration of a primary stirring period, wherein the hole plugging cylinder drives a plugging block to plug a blanking hole, a material pressing box moves downwards under the driving of the material pressing cylinder, and the additive in a feeding tank is forced to be extruded within 1 second; then the material pressing cylinder drives the material pressing box to reset upwards, and finally the connecting electromagnetic valve is opened, so that the additive in the material storage tank enters the material feeding tank through the connecting pipe and the weighing device; when the weighing device measures that the weight of the falling material reaches the set primary feeding amount, a signal is sent to the electric control device, and the electric control device closes the electromagnetic valve;
the fourth step is that after the additive is put in for 8 seconds, the forced stirring tank is controlled to stop stirring, and the unloading electromagnetic valve is opened to enable the uniformly stirred mixture to flow out of the forced stirring tank downwards;
and circularly performing the third step and the fourth step to realize the connection stirring operation.
3. The admixture mixing method of claim 2 wherein: in the process of circularly performing the third step and the fourth step, when the amount of the additive at the top of the dust removing box is less than 500 kilograms, a hoisting device is used for supplementing the additive to the top of the dust removing box; when the additive in the storage tank is less than the set one-time feeding amount, the additive is fed into the storage tank through the feed opening until the storage tank is filled with the additive.
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| CN110523314A (en) * | 2019-09-14 | 2019-12-03 | 江苏永联精筑建设集团有限公司 | A kind of asphalt mixing building added material suggestion device |
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| EP0046827B1 (en) * | 1980-08-27 | 1985-04-03 | Paul E. Bracegirdle | Process and apparatus for making asphalt concrete |
| ES2184323T3 (en) * | 1997-08-29 | 2003-04-01 | Schumann Sasol Gmbh | BETUN OR ASPHALT TO MANUFACTURE A ROAD COATING, ROAD COVERING AND PROCEDURE TO MANUFACTURE BETUN OR ASPHALT. |
| CN202369889U (en) * | 2011-12-23 | 2012-08-08 | 上海浦东路桥建设股份有限公司 | Automatic feeding equipment for asphalt mixing plant |
| CN103318656A (en) * | 2013-06-19 | 2013-09-25 | 华南理工大学 | Additive adding equipment for asphalt mixing plant |
| CN203829973U (en) * | 2014-04-28 | 2014-09-17 | 苏州拓博琳新材料科技有限公司 | Automatic asphalt mixture additive feeding machine |
| CN205935795U (en) * | 2016-07-08 | 2017-02-08 | 山东省路桥集团有限公司 | Pitch hot mix plant recycling blendes station and attaches building |
| CN206034248U (en) * | 2016-08-23 | 2017-03-22 | 南阳市龙达工程机械有限公司 | Formula of pressure asphalt mixture stirring device |
-
2017
- 2017-06-16 CN CN201710459652.5A patent/CN107217571B/en active Active
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