CN102505610B - Foamed asphalt foaming device - Google Patents

Abstract

A foaming asphalt foaming device, comprising a foaming nozzle, a water nozzle and an air nozzle connected to the foaming nozzle, an asphalt pipe, and an asphalt on-off control mechanism, characterized in that: the foaming nozzle is composed of a foaming nozzle body and a water 1. Composed of kits connected by air nozzles. The foaming nozzle body is formed with two parallel ring-shaped grooves centered on the foaming nozzle. The ring-shaped groove is provided with a spout communicating with the foaming chamber of the foaming nozzle. , the set adopts a segmented stepped structure, and when it fits with the foaming nozzle body, the groove on the foaming nozzle body and the inner wall of the set form a sealed annular cavity. This kind of foamed asphalt foaming device makes high-temperature liquid asphalt fully contact with water and compressed air, improves the quality of asphalt foaming, and ensures that the asphalt can be foamed efficiently; at the same time, it effectively solves the problem of scaling and blockage on the asphalt nozzle.

Description

A kind of foam bitumen foaming device

technical field

The invention belongs to the field of road construction material production equipment, and in particular relates to a foamed asphalt foaming device capable of efficiently foaming and automatically cleaning residual asphalt on asphalt spouts.

Background technique

Foamed asphalt technology and pavement material regeneration technology have developed rapidly in recent years, and the foamed asphalt foaming device used to prepare foamed asphalt has also developed accordingly, extending many new structures.

At present, there are two commonly used structures: one is to use a single water nozzle and a single compressed air nozzle arranged in parallel to directly pass into the foaming asphalt foaming cavity. This structure uses point-to-point contact between asphalt, water and compressed air. As a result, a considerable part of asphalt is not in contact with water and air, the foaming effect is not ideal, and the foaming efficiency is not high. The second is to use the cylinder as the driving element, and use the lower end of the piston rod of the cylinder to press into the asphalt nozzle to control the on-off of the asphalt nozzle. The foam nozzle is connected; when the foam nozzle is not working, the upper end of the cylinder is ventilated, the tie rod is lowered, and the asphalt nozzle and the foam nozzle are blocked; due to the relatively high viscosity of the asphalt, the asphalt nozzle leading to the main body of the foam nozzle is easy Blockage, the conventional solution is to add a boss with the same size as the asphalt nozzle at the lower end of the above-mentioned tie rod. With the change of ventilation between the upper and lower chambers of the cylinder piston, the boss is driven to mechanically clean the asphalt nozzle. However, due to the structure The on-off mode of the asphalt nozzle determines that the opening size of the asphalt nozzle is usually small, and the boss that can be used to clean the asphalt scale is small in size, and it is easy to damage and has a high failure rate.

Contents of the invention

In order to solve the problems of low foaming efficiency and unclean cleaning, the present invention provides a foamed asphalt foaming device capable of foaming efficiently and automatically cleaning residual asphalt on the asphalt nozzle.

For this reason, the present invention provides a kind of foaming asphalt foaming device, comprise foaming nozzle, the water nozzle that communicates with foaming nozzle and air nozzle, asphalt pipe, asphalt on-off control mechanism, described foaming nozzle is provided with asphalt The asphalt nozzle connected by the pipe, the on-off of the asphalt nozzle and the foaming nozzle is controlled by the asphalt on-off control mechanism. It is characterized in that two parallel seals centered on the foaming nozzle are formed on the outer wall of the foaming nozzle. The annular cavity, the side wall of the annular cavity is provided with a spout communicating with the foaming cavity of the foaming nozzle, and the two sealed annular cavities are respectively sealed and connected with the water nozzle and the air nozzle, and the annular cavities are all located at Below the asphalt spout, the annular cavity closest to the asphalt spout is connected with the water nozzle. The asphalt ejected from the asphalt nozzle first contacts the water ejected from the annular cavity communicated with the water nozzle, and then contacts the gas injected from the annular cavity communicated with the air nozzle.

Further, the foaming nozzle is composed of a foaming nozzle body and a set connected to the water and air nozzles. The foaming nozzle body is formed with two parallel annular grooves centered on the foaming nozzle. There is a spout connected to the foaming chamber of the nozzle on the groove, and the set adopts a segmented stepped structure. When it fits with the foaming nozzle body, the groove on the foaming nozzle body and the inner wall of the set into a sealed annular cavity.

Further, within the range where the sleeve fits with the foaming nozzle body, a high-temperature-resistant sealing ring is provided on the raised part of the lower side of the two annular grooves.

Further, the asphalt spout is arranged directly above the foaming nozzle, and the water and air spouts on the side wall of the annular cavity connected to the water nozzle and the air nozzle are equidistantly distributed and the centerline of the spout is aligned with the centerline of the foaming nozzle body. Vertical or at an angle.

Further, the centerline of the water nozzle is perpendicular to the centerline of the foaming nozzle body, and the centerline of the air nozzle and the centerline of the foaming nozzle body form a certain downward angle.

Further, the asphalt on-off control mechanism includes a cylinder, a pull rod and a cut-off piece whose end face is adapted to the asphalt nozzle. One end of the pull rod is connected to the output end of the cylinder, and the other end passes through the asphalt pipe and extends to the foaming nozzle. The bubble cavity is connected with the cut-off piece.

Further, the cut-off member is a stepped structure with a small top and a large bottom, the upper end surface of which is adapted to the asphalt spout, and the lower part is a tapered structure.

The present invention has following beneficial effect:

The foamed asphalt foaming device provided by the invention overcomes the defects of insufficient foaming of the existing asphalt foaming device and the inability to thoroughly clean the asphalt spout. The method of ring-shaped injection of foaming water and compressed air is adopted to fully contact high-temperature liquid asphalt with water and compressed air; the method of successively contacting high-temperature liquid asphalt with water and gas improves the quality of asphalt foaming and ensures high-efficiency asphalt. Foaming: The special on-off structure of the asphalt nozzle is adopted, which is suitable for asphalt foaming, and at the same time effectively solves the problem of fouling and blockage on the asphalt nozzle.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the foamed asphalt foaming device of this embodiment.

Fig. 2 is a schematic diagram of the foaming nozzle of the foamed asphalt foaming device of this embodiment.

Detailed ways

In order to better understand the technical solutions of the present invention, the embodiments provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to Figure 1, the foamed asphalt generating device includes: foaming nozzle body 1, kit 2, asphalt pipe 3, fixed sleeve 4, cylinder support 5, cylinder 6, pull rod 7, guide sleeve 8, seal 9, asphalt Pipe connection 10, cut-off piece 11, sealing gasket 12, water nozzle 13, compressed air nozzle 14.

Referring to Figures 1 and 2, the foaming nozzle main body 1 is provided with an asphalt spout 101 in the center of its top, and the outer wall of the nozzle main body 1 is formed with two parallel upper and lower first annular concave grooves centered on the foaming nozzle. Groove 102 and second annular groove 103, on the side wall of the first, second annular groove uniformly have the water spout 104 that communicates with the foaming chamber 10 of nozzle body 1, air spout 105, the center of water spout 104 The line is perpendicular to the centerline of the nozzle body 1 , and the centerline of the gas nozzle 101 and the centerline of the nozzle body 1 form a certain angle downward.

Referring to FIG. 1 , the kit 2 has two nozzle interfaces 201 and 202 distributed on its upper and lower sides, which are sealed and connected with the water nozzle 13 and the compressed air nozzle 14 respectively. The foaming nozzle main body 1 and the sleeve 2 communicating with the water nozzle and the air nozzle adopt a segmented stepped structure. After the foaming nozzle main body 1 and the sleeve 2 are fitted, the first annular groove 102 and the second annular groove The groove 103 and the side wall of the kit 2 enclose two upper and lower first annular cavities 203 and second annular cavities 204. Within the range where the kit 2 fits with the foaming nozzle body 1, the first annular cavity 201 The underside of the second annular cavity 202 and the second annular cavity 202 are respectively provided with high temperature resistant sealing rings 205 to ensure the overall sealing performance of the kit 2 in which the foaming nozzle main body 1 communicates with the water nozzle and the air nozzle after assembly.

Referring to Figure 1, the asphalt pipe 3 is set directly above the casing 2 and the main body of the foaming nozzle 1, and a fixed sleeve 4 is arranged above it, and an asphalt pipe interface 10 is opened at the side end. The asphalt pipe 3 and the kit 2 and the foaming nozzle main body 1 are fixed by a conventional connection (threaded connection, welding or bolt fastening connection, etc.), and sealing gaskets 12 are attached to each end during assembly.

Referring to Fig. 1, the fixed sleeve 4 is fixed with the asphalt pipe 3 by the conventional connection method, the guide sleeve 8 is fixed on the fixed sleeve 4 through bolt connection, and the seal 9 is pressed and fastened on the fixed sleeve 4 and the guide sleeve at the same time 8 in the end space between them. The cylinder 6 is bolted and fixed on the fixed sleeve 4 via the cylinder support 5 .

As shown in FIG. 1 , the lower end of the piston rod of the cylinder 6 is provided with a threaded connection hole, and one end of the pull rod 7 can be connected with the cylinder 6 through the threaded hole, and can be tightened and adjusted by a nut at the same time. The other end of the pull rod 7 is connected via bolts, and a cut-off piece 11 is fixed, and a part of the end surface of the cut-off piece 11 is matched with the asphalt spout 101 .

Referring to FIG. 1 , the asphalt pipe interface 10 is connected to another foamed asphalt generating device according to the present invention by threading, welding, etc., or connected to an asphalt pipeline to form a complete foamed asphalt nozzle assembly.

The working principle of this embodiment:

Turn on the asphalt pump leading to the asphalt pipe interface 10, the foaming water pump leading to the water nozzle 13, and the air compressor leading to the compressed air nozzle 14, and send high-temperature liquid asphalt, water and compressed air into the pump of the present invention respectively. Inside the foam bitumen generator.

There are two ventilation holes on the cylinder 6 to connect the upper and lower chambers of the cylinder: the ventilation of the upper chamber can make the tapered end of the cut-off piece 11 break away from the asphalt pipe 3; the ventilation of the lower chamber can make the tapered end of the cut-off piece 11 close to the asphalt pipe 3 . When it is not working, the cylinder 6 does not need to be ventilated; when it is working, the upper cavity of the cylinder 6 intakes air, and the tie rod 7 moves downward, driving the tapered end of the cut-off piece 11 to separate from the asphalt pipe 3, so that the high-temperature liquid asphalt in the asphalt pipe 3 passes through the tie rod 7 and the gap between the cut-off piece 11 into the foaming nozzle body 1. Due to the relatively high viscosity of asphalt, the asphalt nozzle leading to the foaming nozzle body 1 in the asphalt pipe 3 is easily blocked, and the up and down movement of the pull rod 7 is used to open or close the asphalt nozzle on the asphalt pipe 3, which not only plays a role of on-off The asphalt feeds into the main body 1 of the foaming nozzle, and at the same time plays the role of mechanically cleaning the residual asphalt.

The water and compressed air lead into the two annular cavities 203 and 204 formed by the foaming nozzle body 1 and the casing 2, and are sprayed out from the water nozzle 104 and the air nozzle 105 in a ring. The water from the water spray 104 continues to contact with the compressed air sprayed from the air nozzle 105 after efficient heat exchange with the high-temperature asphalt sprayed by the asphalt nozzle, thereby generating foamed asphalt. Ensure efficient foaming of asphalt.

The above is only a preferred embodiment of the present invention, so it cannot limit the scope of the present invention, that is, the equivalent changes and modifications made according to the patent scope of the present invention and the content of the specification should still belong to the patent of the present invention within the scope covered.

Claims (6)

1. a foaming device for foamed asphalt, comprise effervescent nozzle, the (operating) water nozzle be communicated with effervescent nozzle and gas jets, pitch pipe, pitch break-make controlling organization, described effervescent nozzle has the pitch spout be communicated with pitch pipe, pitch spout and effervescent nozzle logical, disconnected control by pitch break-make controlling organization, it is characterized in that: the toroidal cavity outer wall of effervescent nozzle being formed with the sealing centered by effervescent nozzle that twice be arranged in parallel, the sidewall of this toroidal cavity has the spout be communicated with the foam chamber of effervescent nozzle, two toroidal cavities sealed respectively sealed nozzle gentle to (operating) water nozzle are connected, described toroidal cavity is all located at the below of pitch spout, toroidal cavity near pitch spout is connected with (operating) water nozzle, the pitch that sprayed by pitch spout first with after contacting with the annular water ejected of cavity that (operating) water nozzle is communicated with contacts with the gas of the cavity annular spray be communicated with gas jets again,

Effervescent nozzle is made up of effervescent nozzle body and the external member that is connected with water, gas jets, described effervescent nozzle body is formed with the annular groove centered by effervescent nozzle that twice be arranged in parallel, annular groove has the spout be communicated with the foam chamber of effervescent nozzle, described external member adopts staging bench formula structure, when after itself and effervescent nozzle body fit, the inwall of the groove on effervescent nozzle body and this external member surrounds the toroidal cavity of sealing.

2. foaming device for foamed asphalt according to claim 1, is characterized in that: in the scope of described external member and effervescent nozzle body fit, the bossing on the downside of two annular grooves is provided with resistant to elevated temperatures sealing ring.

3. foaming device for foamed asphalt according to claim 1 and 2, it is characterized in that: described pitch spout is arranged at directly over effervescent nozzle, the water on the toroidal cavity sidewall be connected with (operating) water nozzle and gas jets, gas blowout mouth are equally spaced and the center line of the center line of spout and effervescent nozzle main body is in a certain angle.

4. foaming device for foamed asphalt according to claim 3, is characterized in that: the center line of described water spout and the central axis of effervescent nozzle main body, the center line of gas blowout mouth and the center line of effervescent nozzle main body in a certain angle downwards.

5. foaming device for foamed asphalt according to claim 1 and 2, it is characterized in that: described pitch break-make controlling organization comprises cylinder, pull bar and portion end surface and the suitable cut-off part of pitch spout, described pull bar one end is connected with cylinder output, and the other end extends in the foam chamber of effervescent nozzle through pitch pipe and is connected with cut-off part.

6. foaming device for foamed asphalt according to claim 5, is characterized in that: described cut-off part is up-small and down-big notch cuttype shape structure, and end face and the pitch spout on its top are suitable, and bottom is pyramidal structure.