Automatic feeding device for continuous asphalt concrete production

Abstract

The invention relates to the technical field of transportation devices, in particular to an automatic feeding device for continuous asphalt concrete production, which comprises a conveying pipe, a motor is mounted on the outer wall of the bottom end of the conveying pipe, a screw rod rotatably inserted into the conveying pipe is mounted on a main shaft of the motor, and a discharge port is formed in one end, far away from the motor, of the conveying pipe. And an extrusion mechanism and a dust falling mechanism are arranged in the discharge port. Through the arranged extrusion mechanism, caked raw materials can be intercepted by a conical sieve plate, raw material particles meeting the requirements enter a discharging opening through sieve holes, when the conical sieve plate drives a second extrusion disc to move in a reciprocating mode, and therefore when the second extrusion disc gets close to a first extrusion disc, the caked raw materials intercepted by the conical sieve plate can be extruded and crushed; and the effect of treating raw material cakes in the feeding process before mixing is achieved, the situation that the proportion of asphalt concrete is affected due to uneven mixing of the raw material cakes is avoided, and the practicability of the device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of conveying devices, in particular to an automatic feeding device for continuous asphalt concrete production. BACKGROUND

[0002] Asphalt concrete is one of the common infrastructure materials for highway paving. In the preparation process of asphalt concrete, a variety of materials need to be mixed. The feeding device is used to convey various raw materials such as asphalt, aggregate, and filler to the asphalt mixture mixing equipment. This kind of conveying device can ensure the continuity and efficiency of the asphalt concrete production process. The filler is generally a mineral powder with a specified particle size.

[0003] However, the mineral powder may clog during storage. The existing technology cannot break the clogs during feeding, which affects the mixing ratio of asphalt concrete. SUMMARY

[0004] The purpose of the present application is to solve the shortcomings of the prior art and provide an automatic feeding device for continuous asphalt concrete production. The present application is provided with an extrusion mechanism. The clogged raw materials are intercepted by the conical sieve plate. The raw material particles meeting the requirements pass through the sieve hole into the discharge port. The second extrusion disc is driven by the conical sieve plate to move back and forth. When the second extrusion disc approaches the first extrusion disc, the clogs intercepted by the conical sieve plate are crushed. The effect of treating the raw material clogs before mixing is achieved. The uneven mixing of raw material clogs does not affect the asphalt concrete mixing ratio, improving the practicality of the device.

[0005] In order to achieve the above object, the present application adopts the following technical scheme: a continuous asphalt concrete production automatic feeding device, comprising a conveying pipe, a motor is installed on the bottom end outer wall of the conveying pipe, a screw rod rotatingly inserted into the conveying pipe is installed on the main shaft of the motor, a discharge port is formed on the end of the conveying pipe away from the motor, an extrusion mechanism and a dust falling mechanism are arranged in the discharge port, the extrusion mechanism comprises a second extrusion disc, a first extrusion disc is welded on the end outer wall of the screw rod close to the discharge port, a transmission shaft is installed on the end wall center of the first extrusion disc, the second extrusion disc is slidingly sleeved on the outer wall of the transmission shaft, the outer wall of the transmission shaft is provided with a limiting block distributed in the axial direction, a limiting groove for inserting the limiting block is formed on the outer wall of the second extrusion disc, a conical sieve plate is fixed on the outer wall of the second extrusion disc, the large end face of the conical sieve plate is away from the first extrusion disc and close to the inner wall of the conveying pipe, a support is fixed on the inner wall of the discharge port, a stroke groove is formed on the inner wall of the support, a support rod is welded on the end outer wall of the conical sieve plate close to the discharge port, a push rod slidingly inserted into the stroke groove is installed on the end wall of the support rod, the raw material agglomerates are intercepted by the conical sieve plate, when the screw rod drives the conical sieve plate to rotate, the push rod reciprocates in the stroke groove, and the raw material agglomerates between the first extrusion disc and the second extrusion disc are extruded.

[0006] Preferably, the conveying pipe is provided with a feeding port on the top outer wall of the end close to the motor.

[0007] Preferably, the outer wall of the conical sieve plate is provided with a plurality of scraping plates distributed at equal intervals in the circumferential direction, a plurality of extrusion plates distributed at equal intervals in the circumferential direction are welded on the outer wall of the first extrusion disc, and the extrusion plates are located in the intervals of the scraping plates.

[0008] Preferably, the dust falling mechanism comprises a first piston, a first plug cylinder and a second plug cylinder that are in communication with each other are formed on the outer wall of the discharge port, the first piston is slidingly inserted into the first plug cylinder, a plug rod rotatingly sleeved on the end wall of the support rod is fixed on the end wall of the first piston, and a first bevel gear disc is fixed on the outer wall of the support rod.

[0009] Preferably, a gas suction port in communication with the discharge port is formed on the inner wall of the first plug cylinder, a gas discharge port in communication with the cloth bag is formed on the inner wall of the first plug cylinder, ball plugs are slidingly inserted into the gas suction port and the gas discharge port, and a third spring is installed between the outer wall of each ball plug and the inner wall of the corresponding gas suction port or gas discharge port.

[0010] Preferably, a second bevel gear disc buckled with the first bevel gear disc is slidingly sleeved on the outer wall of the support rod, an extension rod extending into the second plug cylinder is welded on the outer wall of the second bevel gear disc, and a first spring is arranged between the outer wall of the extension rod and the outer wall of the support.

[0011] Preferably, one end of the extension rod is welded with a sealing block slidingly inserted into the second cylinder, the sealing block is tightly attached to the first piston, and a slide rod is slidingly inserted into the outer wall of the sealing block.

[0012] Preferably, a second piston slidingly inserted into the second cylinder is installed on the end wall of the slide rod, and a second spring is installed between the outer wall of the sealing block and the outer wall of the end of the slide rod away from the second piston.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] 1、The extrusion mechanism is arranged, so that the caked raw materials are intercepted by the conical sieve plate, and the raw material particles meeting the requirements enter the discharge port through the sieve holes, when the second extrusion disc reciprocates driven by the conical sieve plate, the caked raw materials intercepted by the conical sieve plate are crushed when the second extrusion disc approaches the first extrusion disc, so that the effect of treating the caked raw materials in the feeding process before mixing is realized, the situation that the mixing of caked raw materials affects the asphalt concrete proportioning due to unevenness is avoided, and the practicability of the device is improved.

[0015] 2、The dust falling mechanism is arranged, so that the first piston reciprocates in the first cylinder when the push rod reciprocates, so that when the first piston moves away from the discharge port, the dust generated when the material falls in the discharge port is sucked into the first cylinder through the air suction port, when the first piston approaches the discharge port, the gas containing dust is extruded into the cloth bag through the air outlet for filtration, so that the effect of reducing dust and recycling raw materials is realized.

[0016] 3、The first bevel gear plate and the second bevel gear plate cannot be reset and buckled when the screw rotation speed increases, so that the second cylinder maintains the state of expanding the internal space volume, so that when the first piston reciprocates, the gas can enter the first cylinder and the second cylinder, so that the effect of increasing the air suction amount is realized, so that the device can automatically adjust the dust suction force according to the dust possibility, and the automation degree is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic view of the overall mechanism of the present application;

[0018] Figure 2 It is a plane section view schematic view of the overall structure of the present application;

[0019] Figure 3 It is an enlarged schematic view of the structure at A of the present application; Figure 2

[0020] Figure 4 It is a three-dimensional schematic view of the conical sieve plate of the present application; ​

[0021] Figure 5 It is a perspective view of the lever of the application;

[0022] Figure 6 It is a perspective view of the second bevel gear disc of the application;

[0023] Figure 7 It is a perspective view of the sealing block of the application;

[0024] Figure 8 It is a perspective view of the first plug cylinder of the application;

[0025] Figure 9 It is a perspective view of the stroke groove of the application.

[0026] Legend:

[0027] 1, conveying pipe; 11, feed inlet; 12, discharge outlet; 13, support; 131, stroke groove; 15, first plug cylinder; 151, air outlet; 152, exhaust port; 153, cloth bag; 154, ball plug; 155, third spring; 16, second plug cylinder; 2, motor; 21, screw; 22, first extrusion disc; 23, extrusion plate; 24, transmission shaft; 241, limiting block; 3, conical sieve plate; 31, second extrusion disc; 32, scraper; 33, limiting groove; 34, support rod; 35, first bevel gear disc; 4, lever; 5, first piston; 51, plug rod; 6, second bevel gear disc; 61, extension rod; 62, first spring; 63, sealing block; 64, second piston; 65, slide rod; 66, second spring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme of the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the protection of the application.

[0029] Referring to Figures 1 to 9 shown, an automatic feeding device for continuous asphalt concrete production, comprising a conveying pipe 1, a motor 2 is installed on the outer wall of the bottom end of the conveying pipe 1, a screw 21 is installed on the main shaft of the motor 2 and is rotatably inserted into the conveying pipe 1, a discharge outlet 12 is formed on the end of the conveying pipe 1 away from the motor 2, an extrusion mechanism and a dust reduction mechanism are arranged in the discharge outlet 12, and a feed inlet 11 is arranged on the top outer wall of the end of the conveying pipe 1 close to the motor 2;

[0030] The extrusion mechanism comprises a second extrusion disc 31, a first extrusion disc 22 welded to the outer wall of one end of the screw rod 21 close to the discharge port 12, a transmission shaft 24 installed at the center of the end wall of the first extrusion disc 22, the second extrusion disc 31 slidingly sleeved on the outer wall of the transmission shaft 24, the outer wall of the transmission shaft 24 being provided with limiting blocks 241 distributed in the axial direction, the outer wall of the second extrusion disc 31 being provided with limiting grooves 33 for inserting the limiting blocks 241, the outer wall of the second extrusion disc 31 being fixed with a conical sieve plate 3, the large end face of the conical sieve plate 3 being away from the first extrusion disc 22 and closely attached to the inner wall of the conveying pipe 1, the inner wall of the discharge port 12 being fixed with a bracket 13, the inner wall of the bracket 13 being provided with a stroke groove 131, the outer wall of one end of the conical sieve plate 3 close to the discharge port 12 being welded with a support rod 34, the end wall of the support rod 34 being installed with a push rod 4 slidingly inserted into the stroke groove 131, the raw material agglomerates being intercepted by the conical sieve plate 3, when the screw rod 21 drives the conical sieve plate 3 to rotate, the push rod 4 reciprocates in the stroke groove 131, the raw material agglomerates between the first extrusion disc 22 and the second extrusion disc 31 are extruded, the outer wall of the conical sieve plate 3 is provided with a plurality of scraping plates 32 distributed at equal intervals in the circumferential direction, and the outer wall of the first extrusion disc 22 is welded with a plurality of extrusion plates 23 distributed at equal intervals in the circumferential direction, the extrusion plates 23 being located in the intervals of the scraping plates 32.

[0031] It should be noted that the stroke groove 131 is a circular ring-shaped sliding groove inclined to the axis of the conveying pipe 1, so that when the push rod 4 rotates, it reciprocates along the axis direction of the conveying pipe 1.

[0032] The motor 2 drives the screw rod 21 to rotate, transporting the raw materials at the feeding port 11 to the high discharge port 12, the agglomerated raw materials being intercepted by the conical sieve plate 3, the raw material particles meeting the requirements entering the discharge port 12 through the sieve holes, under the action of the limiting blocks 241 and the limiting grooves 33, the screw rod 21 drives the conical sieve plate 3 to rotate synchronously, so that the conical sieve plate 3 drives the push rod 4 to rotate along the stroke groove 131, so that the push rod 4 drives the conical sieve plate 3 to reciprocate along the axis direction of the conveying pipe 1, the conical sieve plate 3 drives the second extrusion disc 31 to reciprocate, so that when the second extrusion disc 31 approaches the first extrusion disc 22, the agglomerates intercepted by the conical sieve plate 3 can be extruded and broken, achieving the effect of treating the raw material agglomerates during the feeding process before mixing, avoiding the situation that the mixing of raw material agglomerates affects the proportioning of asphalt concrete due to unevenness, and improving the practicability of the device.

[0033] Meanwhile, the scraper 32 is arranged to scrape the agglomerates of the raw material under the first extrusion disc 22 and the second extrusion disc 31, and when the conical screen plate 3 rotates upwards, the agglomerates can slide along the slope of the conical screen plate 3 to the space between the first extrusion disc 22 and the second extrusion disc 31 when the agglomerates are driven by the conical screen plate 3 to rotate above the second extrusion disc 31, so that the agglomerates can be crushed under pressure, thereby avoiding the situation of extrusion dead angle and improving the completeness of the agglomerate treatment.

[0034] When the inside of the conveying pipe 1 is filled with the raw material, the agglomerates can be prevented from falling down due to the lack of space, and the agglomerates can be inserted into the space between the scraper 32 and the scraper 32, so that the extrusion plate 23 on the first extrusion disc 22 can be inserted into the space between the scrapers 32 when the conical screen plate 3 reciprocates, thereby further improving the effect of the agglomerate treatment and the practicability of the device.

[0035] In addition, the connecting mode between the supporting rod 34 and the push rod 4 can be quick release or adjustable, so that the length of the push rod 4 can be replaced or adjusted before work, thereby adjusting the distance between the second extrusion disc 31 and the first extrusion disc 22, and adjusting the particle size of the crushed particles, so that the device can meet the feeding work of raw materials with different particle sizes, improve the practicability of the device, and further avoid the situation that the prior art cannot decompose the agglomerates during feeding.

[0036] The dust suppression mechanism includes a first piston 5. A first piston cylinder 15 and a second piston cylinder 16, which are interconnected, are formed on the outer wall of the discharge port 12. The first piston 5 is slidably inserted into the first piston cylinder 15. A piston rod 51, rotatably mounted on the end wall of a support rod 34, is fixed to the end wall of the first piston 5. A first helical gear disc 35 is fixed to the outer wall of the support rod 34. An air extraction port 151, communicating with the discharge port 12, is formed on the inner wall of the first piston cylinder 15. An exhaust port 152, communicating with a cloth bag 153, is also formed on the inner wall of the first piston cylinder 15. Ball plugs 154 are slidably inserted into both the air extraction port 151 and the exhaust port 152. A third spring 15 is installed between the outer wall of each ball plug 154 and the inner wall of the corresponding air extraction port 151 or exhaust port 152. 5. A second helical gear disk 6, which engages with the first helical gear disk 35, is slidably fitted on the outer wall of the support rod 34. An extension rod 61 extending into the second piston cylinder 16 is welded to the outer wall of the second helical gear disk 6. A first spring 62 is provided between the outer wall of the extension rod 61 and the outer wall of the bracket 13. A sealing block 63, which is slidably inserted into the second piston cylinder 16, is welded to the outer wall of the end of the extension rod 61 located in the second piston cylinder 16. The sealing block 63 is tightly fitted with the first piston 5. A slide rod 65 is slidably inserted into the outer wall of the sealing block 63. A second piston 64, which is slidably inserted into the second piston cylinder 16, is installed on the end wall of the slide rod 65. A second spring 66 is installed between the outer wall of the end of the slide rod 65 away from the second piston 64 and the outer wall of the sealing block 63.

[0037] It should be noted that the thickness of the second piston 64 is not less than the displacement length of the first piston 5, so as to ensure that the first piston 5 will not separate from the second piston 64 when it moves, thereby ensuring the sealing of the first piston cylinder 15 and the second piston cylinder 16. Under the action of the ball plug 154 and the third spring 155, the gas can only enter the exhaust port 152 from the suction port 151.

[0038] When the lever 4 moves back and forth, it drives the first piston 5 to move back and forth in the first cylinder 15. This causes the dust generated when the material falls into the discharge port 12 to be drawn into the first cylinder 15 through the air extraction port 151 when the first piston 5 moves away from the discharge port 12. When the first piston 5 moves close to the discharge port 12, the gas containing dust is squeezed into the cloth bag 153 through the exhaust port 152 for filtration, thereby reducing dust and recovering raw materials at the same time.

[0039] Furthermore, when the feeding speed is high, the amount of material falling from the discharge port 12 per unit time increases, resulting in more dust generation. The first helical toothed disc 35 and the second helical toothed disc 6, when the motor 2 drives the screw 21 to rotate rapidly to increase the feeding speed, cause the screw 21 to drive the conical screen plate 3 to rotate rapidly. This, in turn, causes the conical screen plate 3 to drive the first helical toothed disc 35 to rotate rapidly. At this time, the first helical toothed disc 35 continuously and rapidly pushes the second helical toothed disc 6 towards the side where the first piston 5 is located, preventing the second helical toothed disc 6 from resetting under the action of the second spring 66. This keeps the second helical toothed disc 6 in a position away from the first helical toothed disc 35. The second helical toothed disc 6 pushes the seal through the extension rod 61. Block 63 slides away from the discharge port 12, so that the second cylinder 16 maintains an expanded internal space. This allows gas to enter the first cylinder 15 and the second cylinder 16 when the first piston 5 reciprocates, thereby increasing the suction volume. This enables the device to automatically adjust the suction force according to the likelihood of dust generation, further improving the degree of automation. Furthermore, the screening and agglomeration processes are completed inside the conveying pipe 1, which also greatly reduces dust generation. When the first piston 5 returns, it pushes the second piston 64 to move together, so that the gas in the first cylinder 15 and the second cylinder 16 can be forced into the cloth bag 153.

[0040] Working principle: Before operation, move the discharge port 12 of this device above the feed port of the mixing equipment, and add the raw material into the conveying pipe 1 from the feed port 11. By changing or adjusting the length of the lever 4, the distance between the second extrusion plate 31 and the first extrusion plate 22 can be adjusted, thereby adjusting the particle size of the extrusion and crushing.

[0041] During operation, under the action of the extrusion mechanism, the starting motor 2 drives the screw 21 to rotate, transporting the raw material at the feed port 11 to the discharge port 12 at a higher position. The agglomerated raw material will be intercepted by the conical screen plate 3, and the raw material particles that meet the requirements will enter the discharge port 12 through the screen holes. At the same time, the conical screen plate 3 drives the second extrusion plate 31 to move back and forth, so that when the second extrusion plate 31 approaches the first extrusion plate 22, it can crush the agglomerated material intercepted by the conical screen plate 3, thus achieving the effect of processing the agglomerated raw material during the feeding process before mixing.

[0042] Furthermore, when there is a lot of raw material inside the conveying pipe 1, the raw material fills the inner cavity of the conveying pipe 1. At this time, the clumps will stay between the scrapers 32 and the gap between the scrapers 32. When the conical screen plate 3 moves back and forth, the extrusion plate 23 on the first extrusion plate 22 can be inserted into the gap between the scrapers 32, so as to extrude the clumps and avoid the existence of extrusion dead corners.

[0043] Meanwhile, under the action of the dust removal mechanism, when the lever 4 moves back and forth, it drives the first piston 5 to move back and forth in the first cylinder 15. As a result, when the first piston 5 moves away from the discharge port 12, the dust generated when the material falls into the discharge port 12 is sucked into the first cylinder 15 through the air extraction port 151. When the first piston 5 moves close to the discharge port 12, the gas containing dust is squeezed into the cloth bag 153 through the exhaust port 152 for filtration, thereby reducing dust and recovering raw materials at the same time.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic feeding device for continuous asphalt concrete production, comprising a conveying pipe (1), characterized in that: A motor (2) is installed on the outer wall of the bottom end of the conveying pipe (1). A screw (21) is installed on the main shaft of the motor (2) and inserted into the conveying pipe (1). A discharge port (12) is opened at the end of the conveying pipe (1) away from the motor (2). An extrusion mechanism and a dust removal mechanism are provided in the discharge port (12). The extrusion mechanism includes a second extrusion disc (31). A first extrusion disc (22) is welded to the outer wall of the screw (21) near the discharge port (12). A drive shaft (24) is installed at the center of the end wall of the first extrusion disc (22). The second extrusion disc (31) is slidably fitted onto the outer wall of the drive shaft (24). A limiting block (241) is provided on the outer wall of the drive shaft (24) along the axial direction. A limiting groove (33) for inserting the limiting block (241) is provided on the outer wall of the second extrusion disc (31). A conical screen plate (3) is fixed on the outer wall of the second extrusion plate (31). The large conical end face of the conical screen plate (3) is far away from the first extrusion plate (22) and close to the inner wall of the conveying pipe (1). A bracket (13) is fixed on the inner wall of the discharge port (12). A stroke groove (131) is opened on the inner wall of the bracket (13). A support rod (34) is welded on the outer wall of the conical screen plate (3) near the discharge port (12). A lever (4) is installed on the end wall of the support rod (34) and slidably inserted into the stroke groove (131). The conical screen plate (3) intercepts the raw material clumps. When the screw (21) drives the conical screen plate (3) to rotate, the lever (4) moves back and forth in the stroke groove (131), and the raw material clumps between the first extrusion plate (22) and the second extrusion plate (31) are squeezed.

2. The automatic feeding device for continuous asphalt concrete production according to claim 1, characterized in that: The conveying pipe (1) has a feed inlet (11) on the top outer wall of the end closest to the motor (2).

3. The automatic feeding device for continuous asphalt concrete production according to claim 1, characterized in that: The outer wall of the conical sieve plate (3) is provided with a number of equidistant circumferentially distributed scrapers (32), and the outer wall of the first extrusion plate (22) is welded with a number of equidistant circumferentially distributed extrusion plates (23), and the extrusion plates (23) are located within the intervals of the scrapers (32).

4. The automatic feeding device for continuous asphalt concrete production according to claim 1, characterized in that: The dust suppression mechanism includes a first piston (5), and a first plug cylinder (15) and a second plug cylinder (16) that are interconnected are provided on the outer wall of the discharge port (12). The first piston (5) is slidably inserted into the first plug cylinder (15). A plug rod (51) that is rotatably mounted on the end wall of the support rod (34) is fixed on the end wall of the first piston (5). A first helical toothed disc (35) is fixed on the outer wall of the support rod (34).

5. The automatic feeding device for continuous asphalt concrete production according to claim 4, characterized in that: The inner wall of the first cylinder (15) is provided with an air extraction port (151) communicating with the discharge port (12), and the inner wall of the first cylinder (15) is provided with an exhaust port (152) communicating with the cloth bag (153). A ball plug (154) is slidably inserted into the air extraction port (151) and the exhaust port (152). A third spring (155) is installed between the outer wall of each ball plug (154) and the inner wall of the air extraction port (151) or the exhaust port (152) where it is located.

6. The automatic feeding device for continuous asphalt concrete production according to claim 4, characterized in that: The outer wall of the support rod (34) is slidably fitted with a second helical gear plate (6) that engages with the first helical gear plate (35). An extension rod (61) extending into the second piston cylinder (16) is welded to the outer wall of the second helical gear plate (6). A first spring (62) is provided between the outer wall of the extension rod (61) and the outer wall of the bracket (13).

7. An automatic feeding device for continuous asphalt concrete production according to claim 6, characterized in that: The extension rod (61) is located inside the second piston cylinder (16) and a sealing block (63) is welded to the outer wall of one end. The sealing block (63) is slidably inserted into the second piston cylinder (16). The sealing block (63) is tightly fitted with the first piston (5). A slide rod (65) is slidably inserted into the outer wall of the sealing block (63).

8. An automatic feeding device for continuous asphalt concrete production according to claim 7, characterized in that: A second piston (64) is slidably inserted into the second piston cylinder (16) on the end wall of the slide rod (65), and a second spring (66) is installed between the outer wall of the end of the slide rod (65) away from the second piston (64) and the outer wall of the sealing block (63).

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