Stone screening device for asphalt mixture

Abstract

The stone screening device for the asphalt mixture comprises a supporting frame, a bearing frame is installed on the supporting frame through four springs, a screening frame is installed on the top of the bearing frame, and a shielding cover is fixed to the top of the screening frame. And the two sides of the top of the shielding cover are each provided with an air cylinder, the bottoms of the two air cylinders penetrate into the shielding cover, a fixing plate is fixed to the bottoms of the two air cylinders through power output shafts, and ejector pins are fixed to the positions, corresponding to the screening holes, of the bottom of the fixing plate. The stone clamped in the sieve holes is broken or pushed out through the ejector pins, so that the permeability of the sieve holes, normal sieving of the stone in the next round and sieving efficiency can be guaranteed, the mode is convenient to operate, the structure is simple, the mode can be automatically achieved through starting of the air cylinder, the sieve holes do not need to be manually cleaned, on one hand, the cleaning efficiency of the sieve holes is improved, and on the other hand, the sieving efficiency is improved. And on the other hand, the operation burden of workers is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to stone screening technical field, concretely is a stone screening device for asphalt mixture. BACKGROUND

[0002] Asphalt mixture is the general term of the mixture made of mineral aggregate and asphalt binder. Before becoming finished product, asphalt mixture needs to add stone with relatively uniform size into asphalt to facilitate the use of finished product.

[0003] Before adding stone into asphalt, stone screening device is needed to screen stone with different sizes to avoid unqualified stone mixing into asphalt and affecting the quality of finished asphalt mixture.

[0004] As mentioned in the asphalt concrete stone screening device with patent number CN202420051541.6, "including device body, mobile groove one, sliding groove, screening groove, discharge port one and discharge port two are set on the device body, motor one, motor two, driving wheel and driven wheel are arranged in the device body, the output end of motor one is connected with the one end of reciprocating screw rod arranged in mobile groove one, mobile seat is arranged on reciprocating screw rod, and the outer wall thread of mobile seat is matched with the inner wall thread of mobile seat, the other end of mobile seat away from reciprocating screw rod is connected with feeding hopper, pulley is arranged at the bottom end of mobile seat, the device body is connected with sieve seat through damping spring, sieve seat is located below feeding hopper, discharge port three is set on sieve seat and vibration motor is arranged, the feeding hopper of the utility model has moving function, which can facilitate feeding and uniformly place stone in the middle and both sides of sieve seat during horizontal reciprocating displacement".

[0005] Through the above-mentioned prior art retrieval, we found that the technology still has some defects:

[0006] When screening stone, because the shape of stone is different, when the size of stone is smaller than the diameter of sieve hole, stone can be smoothly screened out from sieve hole, when the size of stone is larger than the diameter of sieve hole, stone cannot be screened out, and when the size of stone is equivalent to the diameter of sieve hole, these different shaped stones are easy to be stuck in sieve hole and cause blockage of sieve hole, which finally affects the subsequent screening efficiency, at the same time, because the sieve seat for screening stone is exposed, a large amount of dust will be produced during screening, which will pollute the surrounding environment on one hand and is not conducive to the work of workers near the device on the other hand. UTILITY MODEL CONTENTS

[0007] The utility model is aimed at providing a technical solution to solve the above problems.

[0008] In order to achieve the above object, the utility model provides the following technical scheme: A stone screening device for asphalt mixture, including support frame, the support frame is installed with the receiving frame through four springs, the top of receiving frame is installed with screening frame, the side of receiving frame is installed with vibration motor, the top of screening frame is fixed with shielding cover, the inner bottom wall of screening frame is uniformly equipped with sieve hole, the bottom of sieve hole is connected to the inside of receiving frame, the both sides of the top of shielding cover all are installed with a cylinder, the bottom of two cylinder is penetrated to the inside of shielding cover and is fixed with fixed plate through power output shaft, the bottom of fixed plate and the position corresponding to each sieve hole all are fixed with thimble, the top of fixed plate four corners all are fixed with limit rod, the top of limit rod is out of shielding cover and is flush with the surface of shielding cover.

[0009] As a further scheme of the utility model: The top side of the shielding cover is also provided with a feed hopper, the bottom of the feed hopper is communicated to the screening frame, and the horizontal length of the discharge end of the bottom of the feed hopper is the same as the horizontal length of the inner bottom wall of the screening frame.

[0010] As a further scheme of the utility model: The inner top wall of the shielding cover and the position close to the discharge end of the bottom of the feed hopper are also fixed with a baffle, the height of the baffle is less than the height of the inner cavity of the shielding cover.

[0011] As a further scheme of the utility model: The diameter of the thimble is less than the diameter of the sieve hole, the bottom of the thimble is a pointed end structure, and the height of the thimble inside the shielding cover is higher than the height of the bottom of the baffle.

[0012] As a further scheme of the utility model: The receiving frame and the screening frame are designed into inclined structures, one side of the receiving frame is provided with a discharge port one, and one side of the screening frame is communicated with a discharge port two.

[0013] As a further scheme of the utility model: The inner cavity of the fixed plate is also provided with a concentration cavity, the inner bottom wall of the fixed plate and the position between every two thimbles are also provided with an air suction hole communicated with the concentration cavity, and the top of the fixed plate is fixed with a through pipe three communicated with the concentration cavity.

[0014] As a further scheme of the utility model: The top side of the shielding cover is also fixed with a filter box, the top of the filter box is sequentially inserted from right to left with a filter plate one, a filter plate two and a filter plate three, the air outlet end of the filter box is communicated with an exhaust pipe, and the air inlet end of the filter box is communicated with a through pipe one; The inside of the filter plate one is installed with a 80-100 mesh filter screen, the inside of the filter plate two is installed with a 110-120 mesh filter screen, and the inside of the filter plate three is installed with activated carbon filter cotton.

[0015] As a further scheme of the utility model: the top of the shielding cover and close to the position of filter box still is equipped with the exhaust fan, the exhaust end of exhaust fan is communicated with the lead -through pipe no. 1, the air inlet end of exhaust fan is communicated with lead -through pipe no. 2, and lead -through pipe no. 2 is fixedly penetrated to the inner chamber of shielding cover and is fixedly communicated with bellow, the other end of bellow is fixedly communicated with lead -through pipe no. 3.

[0016] Compared with the prior art, the utility model has the beneficial effects as follows:

[0017] I. In the application, by setting shielding cover on the screening frame, setting fixed plate, thimble, air cylinder and limit rod on the shielding cover and other structures, the stone material in the screen hole can be broken or pushed out by thimble after one round of stone screening, so that the permeability of the screen hole can be ensured, the normal screening of the next round of stone material can be ensured, and the efficiency during screening can be ensured. The method is convenient to operate, simple in structure, and can be automatically realized by starting the air cylinder, without manual cleaning of the screen hole. On the one hand, the cleaning efficiency of the screen hole is enhanced, and on the other hand, the operation burden of the workers is reduced.

[0018] II. In the application, by designing shielding cover, air suction hole, concentration cavity, bellow, exhaust fan and filter box and other structures, a shielding structure can be formed on the screening frame by the shielding cover, so that the dust generated can be avoided to be directly exposed to the outside. With the starting of the exhaust fan, the dust generated in the screening frame can be extracted and transmitted to the filter box for multiple filtration, so that the direct emission of dust to cause environmental pollution is avoided, and a relatively lower dust working environment for the workers is created, which is beneficial to the health of the workers. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall three-dimensional structure schematic diagram of the utility model;

[0020] Figure 2 It is the three-dimensional structure schematic diagram of the screening frame of the utility model;

[0021] Figure 3 It is the side sectional structure schematic diagram of the screening frame and shielding cover of the utility model;

[0022] Figure 4 It is the three-dimensional structure schematic diagram of the utility model Figure 3 ;

[0023] Figure 5 It is the side sectional structure schematic diagram of the filter box of the utility model.

[0024] The reference signs and names in the drawings are as follows:

[0025] 1, support frame; 2, spring; 3, receiving frame; 301, discharge port one; 4, vibration motor; 5, screening frame; 501, discharge port two; 502, screen hole; 6, shielding cover; 7, feed hopper; 8, filter box; 801, filter plate one; 802, filter plate two; 803, filter plate three; 9, air cylinder; 10, limiting rod; 11, baffle; 12, fixed plate; 1201, concentration cavity; 1202, air inlet hole; 13, thimble; 14, air extractor; 15, through pipe one; 16, through pipe two; 17, bellows; 18, through pipe three; 19, exhaust pipe. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Please refer to Figures 1-5 A stone screening device for asphalt mixture, comprising a support frame 1, the support frame 1 is provided with a receiving frame 3 through four springs 2, the receiving frame 3 and the screening frame 5 are designed into inclined structures, a discharge port one 301 is formed in one side of the receiving frame 3, a discharge port two 501 is communicated with one side of the screening frame 5, the receiving frame 3 is provided with the screening frame 5 on the top, the receiving frame 3 is used for collecting stones with a diameter less than a screen hole 502 and discharging through the discharge port one 301, the screening frame 5 is used for guiding the stones with a diameter greater than the screen hole 502 and discharging through the discharge port two 501, the receiving frame 3 is provided with a vibration motor 4 on the side, the screening frame 5 is provided with a shielding cover 6 on the top, the vibration motor 4 can drive the whole screening frame 5 to shake after starting; screen holes 502 are uniformly formed in the inner bottom wall of the screening frame 5, the bottom of the screen hole 502 is communicated to the inside of the receiving frame 3; a gas cylinder 9 is mounted on the top of both sides of the shielding cover 6, the bottom of the two gas cylinders 9 penetrates into the inside of the shielding cover 6 and is fixed with a fixed plate 12 through a power output shaft, a thimble 13 is fixed on the bottom of the fixed plate 12 and at the position corresponding to each screen hole 502, limiting rods 10 are fixed at the four corners of the top of the fixed plate 12, the top of the limiting rod 10 movably penetrates out of the shielding cover 6 and is flush with the surface of the shielding cover 6, the limiting rod 10 is used for helping the staff to know the height to which the fixed plate 12 is lifted, that is to say, when the top of the limiting rod 10 is flush with the surface of the shielding cover 6, the height of the fixed plate 12 is higher than the height of the baffle 11, which is a suitable height.

[0028] Please refer to Figure 1 and Figure 3In the embodiment, the top side of the shielding cover 6 is further provided with a feeding hopper 7, the bottom of the feeding hopper 7 is communicated to the screening frame 5, and the transverse length of the feeding hopper 7 at the bottom discharge end is the same as the transverse length of the inner bottom wall of the screening frame 5.

[0029] Specifically, the length of the feeding hopper 7 is relatively long, that is, the bottom basically covers the inner bottom wall of the screening frame 5, so that when the stone is guided through the feeding hopper 7, the stone can be uniformly dropped on the screening frame 5, thereby ensuring the uniform distribution of the stone.

[0030] Please refer to Figure 3 In the embodiment, the inner top wall of the shielding cover 6 and close to the position of the bottom discharge end of the feeding hopper 7 is further fixed with a baffle 11, the height of the baffle 11 is less than the height of the inner cavity of the shielding cover 6.

[0031] Specifically, the baffle 11 can avoid the stone from impacting the fixed plate 12 when the stone is discharged from the feeding hopper 7, thereby avoiding the impact on the temperature of the fixed plate 12, and achieving the blocking effect of the stone.

[0032] Please refer to Figure 3 and Figure 4 In the embodiment, the diameter of the thimble 13 is less than the diameter of the sieve hole 502, the bottom of the thimble 13 is a pointed structure, and the height of the thimble 13 inside the shielding cover 6 is higher than the height of the bottom of the baffle 11.

[0033] Specifically, the pointed thimble 13 can break the stone stuck in the sieve hole 502, thereby ensuring the smoothness of the sieve hole 502, and the bottom of the thimble 13 is higher than the bottom of the baffle 11, which can avoid the stone from impacting the thimble 13 when the stone is dropped from the feeding hopper 7.

[0034] Please refer to Figure 1 , Figure 3 , Figure 4 and Figure 5In the embodiment, the inner cavity of the fixed plate 12 is also provided with a concentration cavity 1201, the inner bottom wall of the fixed plate 12 is also provided with an air suction hole 1202 which is in communication with the concentration cavity 1201 and is located between every two top pins 13, and the top of the fixed plate 12 is fixed with a through pipe three 18 which is in communication with the concentration cavity 1201; the top side of the shielding cover 6 is also fixed with a filter box 8, the top of the filter box 8 is sequentially inserted from right to left with a filter plate one 801, a filter plate two 802 and a filter plate three 803, the air outlet end of the filter box 8 is communicated with an exhaust pipe 19, and the air inlet end of the filter box 8 is communicated with a through pipe one 15; the inner side of the filter plate one 801 is installed with a 80-100 mesh filter screen, the inner side of the filter plate two 802 is installed with a 110-120 mesh filter screen, and the inner side of the filter plate three 803 is installed with activated carbon filter cotton; the top of the shielding cover 6 and close to the filter box 8 is also installed with an air extractor 14, the air outlet end of the air extractor 14 is communicated with the through pipe one 15, the air inlet end of the air extractor 14 is communicated with a through pipe two 16, and the through pipe two 16 is fixedly penetrated into the inner cavity of the shielding cover 6 and is fixedly communicated with a corrugated pipe 17, and the other end of the corrugated pipe 17 is fixedly communicated with the through pipe three 18.

[0035] Specifically, the plurality of air suction holes 1202 can extract dust in the screening frame 5 and concentrate in the concentration cavity 1201, thereby improving the suction efficiency, the through pipe three 18 is used for communication with the concentration cavity 1201, and the dust in the concentration cavity 1201 is extracted through the through pipe three 18, the corrugated pipe 17 is used for keeping the communication of the dust extraction channel when the fixed plate 12 is rising or falling, the air extractor 14 is used for providing suction force to extract the dust in the screening frame 5 and transport the dust to the filter box 8 through the through pipe one 15, and the filter plate one 801, the filter plate two 802 and the filter plate three 803 are arranged in the filter box 8 to make the dust and impurities carried by the stone pass through the filter plate one 801, the filter plate two 802 and the filter plate three 803 in turn, the filter plate one 801 intercepts the dust with larger particles, and the filter plate two 802 and the filter plate three 803 intercept the dust with smaller particles, thereby achieving multiple interception of the dust in the filter box 8 and improving the filtering effect of the dust, and the filter plate one 801, the filter plate two 802 and the filter plate three 803 are detachable on the filter box 8, so that the filter plate one 801, the filter plate two 802 and the filter plate three 803 can be conveniently cleaned or replaced, and in order to ensure the dust filtering effect of the filter plate one 801, the filter plate two 802 and the filter plate three 803, rubber sealing sheets can be additionally arranged at the positions where the three filter plates are inserted into the filter box 8, so as to improve the overall sealing performance of the filter box 8.

[0036] In use:

[0037] The stone to be screened falls uniformly from the feeding hopper 7 to the high part of the screening frame 5, at this time, the vibration motor 4 can be started, and the vibration motor 4 is started to drive the whole screening frame 5 to shake, so that the stone in the screening frame 5 is screened, the stone smaller than the screen hole 502 falls into the receiving frame 3, and finally is discharged through the discharge port one 301, and the stone larger than the screen hole 502 remains in the screening frame 5 and is finally discharged through the discharge port two 501, and the stone discharged through the discharge port one 301 is still mixed with asphalt to form asphalt mixture by using the stone discharged through the discharge port two 501, that is, the stone particle discharged through the discharge port one 301 is smaller, and the stone particle discharged through the discharge port two 501 is relatively larger, which can be determined according to the specific situation;

[0038] During the screening process, a large amount of dust is generated due to the shaking of the stone, at this time, the worker can start the air extractor 14, the air extractor 14 is started to extract the dust in the shielding cover 6 and the screening frame 5 through the through pipe two 16, the corrugated pipe 17, the through pipe three 18, the concentrating cavity 1201 and the plurality of air suction holes 1202, the dust is finally transmitted to the filtering box 8 through the through pipe one 15, and is filtered three times through the filter plate one 801, the filter plate two 802 and the filter plate three 803 in the filtering box 8 and is finally discharged through the exhaust pipe 19, so that the dust is avoided from directly drifting in the working environment;

[0039] When the screening operation is completed, in order to ensure the normal operation of the next screening operation, the worker can start the two air cylinders 9, the power output shaft of the two air cylinders 9 drives the fixed plate 12 to descend, the fixed plate 12 drives the ejector pin 13 to descend, since the position of the ejector pin 13 corresponds to the screen hole 502, the ejector pin 13 can break or push down the stone stuck in the screen hole 502 by using the sharp end, so that each screen hole 502 is kept unobstructed, and the stone can smoothly fall during the subsequent screening operation, after the screen hole 502 is cleaned, the air cylinder 9 is started, the power output shaft of the started air cylinder 9 drives the fixed plate 12 to ascend and is away from the screen hole 502 again, until the top of the limiting rod 10 is flush with the top of the shielding cover 6, that is, the height of the fixed plate 12 driving the ejector pin 13 to ascend is higher than the bottom of the baffle 11.

[0040] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A stone screening device for asphalt mixtures, characterized in that, Includes a support frame (1), the support frame (1) is equipped with a receiving frame (3) by four springs (2), a screening frame (5) is installed on the top of the receiving frame (3), a vibration motor (4) is installed on the side of the receiving frame (3), and a shield (6) is fixed on the top of the screening frame (5). The inner bottom wall of the screening frame (5) is evenly provided with sieve holes (502), and the bottom of the sieve holes (502) is connected to the interior of the receiving frame (3). A cylinder (9) is installed on both sides of the top of the shield (6). The bottom of the two cylinders (9) extends into the interior of the shield (6) and is fixed to a fixing plate (12) via a power output shaft. A pin (13) is fixed at the bottom of the fixing plate (12) and at the position corresponding to each sieve hole (502). A limit rod (10) is fixed at each of the four corners of the top of the fixing plate (12). The top of the limit rod (10) extends through the shield (6) and is flush with the surface of the shield (6).

2. The stone screening device for asphalt mixtures according to claim 1, characterized in that, The top side of the shield (6) is also provided with a feeding hopper (7), the bottom of the feeding hopper (7) is connected to the screening frame (5), and the horizontal length of the bottom discharge end of the feeding hopper (7) is the same as the horizontal length of the inner bottom wall of the screening frame (5).

3. The stone screening device for asphalt mixtures according to claim 1, characterized in that, A baffle (11) is fixed on the inner top wall of the shield (6) near the bottom discharge end of the feed hopper (7). The height of the baffle (11) is less than the height of the inner cavity of the shield (6).

4. The stone screening device for asphalt mixtures according to claim 1, characterized in that, The diameter of the ejector pin (13) is smaller than the diameter of the sieve hole (502), the bottom of the ejector pin (13) is a pointed structure, and the height of the ejector pin (13) inside the shield (6) is higher than the height of the bottom of the baffle (11).

5. The stone screening device for asphalt mixtures according to claim 1, characterized in that, Both the receiving frame (3) and the screening frame (5) are designed as inclined structures. The receiving frame (3) has a discharge port one (301) on one side, and the screening frame (5) has a discharge port two (501) on one side.

6. The stone screening device for asphalt mixtures according to claim 1, characterized in that, The inner cavity of the fixing plate (12) is also provided with a central cavity (1201). The inner bottom wall of the fixing plate (12) and the position between each pair of ejector pins (13) are also provided with an air intake hole (1202) communicating with the central cavity (1201). The top of the fixing plate (12) is fixed with a guide tube three (18) communicating with the central cavity (1201).

7. The stone screening device for asphalt mixtures according to claim 6, characterized in that, A filter box (8) is fixed on one side of the top of the shield (6). Filter plate 1 (801), filter plate 2 (802) and filter plate 3 (803) are inserted into the top of the filter box (8) from right to left. The air outlet of the filter box (8) is connected to an exhaust pipe (19), and the air inlet of the filter box (8) is connected to a guide pipe 1 (15). The inner side of filter plate one (801) is equipped with a filter screen of 80 to 100 mesh, the inner side of filter plate two (802) is equipped with a filter screen of 110 to 120 mesh, and the inner side of filter plate three (803) is equipped with activated carbon filter cotton.

8. The stone screening device for asphalt mixtures according to claim 6, characterized in that, A blower (14) is installed at the top of the shield (6) and near the filter box (8). The exhaust end of the blower (14) is connected to the first guide pipe (15), and the intake end of the blower (14) is connected to the second guide pipe (16). The second guide pipe (16) is fixedly inserted into the inner cavity of the shield (6) and is fixedly connected to the corrugated pipe (17). The other end of the corrugated pipe (17) is fixedly connected to the third guide pipe (18).

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