Asphalt distributor capable of controlling discharging speed and using method thereof

Abstract

The invention relates to the technical field of asphalt distributors, and discloses an asphalt distributor capable of controlling the discharging speed and a using method thereof.The asphalt distributor comprises a fixing frame fixedly arranged at the rear end of the distributor, a plurality of asphalt spraying pipes arranged at intervals are arranged on the upper surface of the lower end of the fixing frame, and asphalt nozzles are connected to pipe openings of the multiple asphalt spraying pipes; a guide pipe is fixedly arranged on the inner wall of the asphalt spray pipe, a cloth bag pipe is fixedly arranged at the end, close to the asphalt spray head, of the guide pipe, the pipe wall of the guide pipe is fixedly sleeved with a fixing ring, and a plurality of rotary connecting mechanisms which are symmetrically arranged in a surrounding mode are arranged on the outer wall of the fixing ring. According to the asphalt distributor capable of controlling the discharging speed and the use method of the asphalt distributor, the running speed of the distributor can be monitored, and the caliber of the asphalt outflow pipe orifice is changed according to the running speed, so that the flow speed of asphalt is changed in the flowing process, the discharging speed is adjusted, asphalt spraying is more uniform, and the service life of the asphalt distributor is prolonged. And the use effect of the distributor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt spreaders, and in particular to an asphalt spreader capable of controlling a discharging speed and a method for using the same. Background Art

[0002] Asphalt spreader is a machine used for asphalt pavement surface treatment and maintenance projects. Through a specific spraying system, liquid asphalt is evenly sprayed on the pavement base to form a waterproof layer, bonding layer or oil-permeable layer, etc., which can not only improve the durability and stability of the pavement, but also reduce the cost of pavement maintenance.

[0003] After searching, the patent document with the announcement number CN218027031U discloses an asphalt spreader with controllable discharging speed. The asphalt spreader is provided with a rotating rod on the bearing plate, a knocking hammer at the end of the elastic rope and a rotating mechanism. During the asphalt spraying process, the knocking hammer will knock on the branch pipe, causing the branch pipe and the nozzle to vibrate, thereby effectively preventing asphalt from adhering to the inner wall of the branch pipe and the nozzle, reducing the probability of the branch pipe and the nozzle being blocked, and ensuring the normal use of the device; At the same time, by means of the heating wire arranged in the inner cavity of the heating sleeve, when the asphalt stops spraying, the branch pipe and the nozzle can be heated, so that the residual asphalt melts and drips downward smoothly, further reducing the probability of the branch pipe and the nozzle being blocked. At the same time, a collection component is fixedly installed on one side of the heating sleeve, which is convenient for the staff to collect the dripping asphalt, thereby improving the practicability of the device.

[0004] However, the above-mentioned disclosed and prior art spreaders all have certain defects when used: Since the rotation speed of the asphalt pump inside the asphalt spreader is fixed, the flow rate of the asphalt flowing out of the pipeline is fixed. When the overall moving speed of the spreader on the road surface increases or decreases, the amount of asphalt that can flow out per unit time increases or decreases due to the fixed flow rate of the spreader, resulting in uneven asphalt spraying of the entire spreader, reducing the use effect of the asphalt spreader. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides an asphalt spreader with controllable discharging speed and a method of using the same. The machine has the ability to adjust the internal diameter of the asphalt flow pipeline according to the overall driving speed of the machine body, so as to adjust the asphalt outflow speed, thereby accurately controlling the discharging speed of the asphalt spreader according to different driving conditions, thereby ensuring uniform asphalt spraying while improving the use effect of the asphalt spreader. The machine solves the problem that the rotation speed of the asphalt pump inside the asphalt spreader is fixed, so that the flow rate of the asphalt flowing out of the pipeline is fixed. When the overall moving speed of the spreader on the road surface increases or decreases, the amount of asphalt that can flow out per unit time increases or decreases due to the fixed flow rate of the spreader, resulting in the problem that the asphalt spraying of the overall spreader is not uniform.

[0006] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an asphalt spreader capable of controlling the discharging speed, comprising a fixing frame fixedly arranged at the rear end of the spreader, a plurality of asphalt spray pipes arranged at intervals are arranged on the upper surface of the lower end of the fixing frame, and asphalt spray heads are connected to the pipe openings of the plurality of asphalt spray pipes; A guide tube is fixedly provided on the inner wall of the asphalt spray pipe, a bag tube is fixedly provided on one end of the guide tube close to the asphalt spray head, a fixing ring is fixedly provided on the tube wall of the guide tube, a plurality of rotating connection mechanisms symmetrically arranged around the outer wall of the fixing ring are provided, and a lifting plate is provided through the rotating connection mechanism, and the lower end of the lifting plate is fixedly connected to the outer side of the pipe opening of the bag tube; A vertical rod is rotatably provided on the wall of each asphalt spray pipe, the lower end of the vertical rod is located in the asphalt spray pipe, and a push adjustment mechanism for adjusting the contraction of the bag pipe opening is provided between the vertical rod and the lifting plate; A mounting plate is fixedly provided on the inner side of the upper end of the fixing frame, and a synchronous driving mechanism for driving the plurality of vertical rods to rotate simultaneously is provided between the mounting plate and the plurality of vertical rods; A mounting frame is fixedly arranged on the outer side of the fixing frame, a strip hole is opened inside the mounting frame, an elastic guide mechanism is arranged inside the strip hole, and a guide wheel is arranged through the elastic guide mechanism, a fixing plate is fixedly arranged on the upper end of the side wall of the mounting frame, a speed sensor is fixedly penetrated inside the fixing plate, the speed sensor is arranged in cooperation with the guide wheel, and the speed sensor is electrically connected to the synchronous driving mechanism.

[0007] Preferably, the rotating connection mechanism includes a fixed block, which is fixed to the outer wall of the fixing ring, a cross bar is rotatably penetrated inside the fixed block, the lifting plate is rotatably sleeved with the cross bar, a torsion spring is sleeved on the rod wall of the cross bar, and both ends of the torsion spring are respectively fixedly connected to the cross bar and the fixed block.

[0008] Preferably, the pushing adjustment mechanism includes a pushing ring, and the outer walls of the plurality of fixed blocks are provided with rotating grooves. The pushing ring is rotatably sleeved inside the plurality of rotating grooves. A plurality of push rods symmetrically arranged in a surrounding manner are fixedly provided on one side of the pushing ring close to the lifting plate. The push rods are in contact with and cooperate with the lifting plate. A cam is fixedly sleeved on the lower end of the vertical rod, and the cam is arranged in cooperation with the pushing ring.

[0009] Preferably, the synchronous drive mechanism comprises a control motor, the upper ends of the plurality of vertical rods are rotatably inserted into the interior of the mounting plate, a worm gear is fixedly sleeved on the upper ends of the vertical rods, the control motor is fixedly mounted on the side wall of the mounting plate, and a worm is fixedly mounted on the end of the output shaft, the worm is matched with the plurality of worm gears, a PLC controller is fixedly mounted on the upper end of the outer wall of the fixing frame, and the PLC controller is matched with the speed sensor and the control motor; A support seat is fixedly arranged on the top of the mounting plate, and one end of the worm gear away from the control motor is rotatably arranged inside the support seat.

[0010] Preferably, the elastic guiding mechanism includes an elastic telescopic rod, which is located inside the strip hole and the upper end is fixedly connected to the top of the inner wall of the strip hole. A support ring is fixedly provided at the lower end of the elastic telescopic rod. The outer wall of the support ring is slidably provided in the strip hole. A support rod is rotatably penetrated inside the support ring, and the guide wheel is fixedly sleeved with the support rod.

[0011] Preferably, each of the asphalt spray pipes is connected by multiple sections of spray pipes, and two adjacent sections of spray pipes are sealed and connected via a connecting flange. A fixing clamp is sleeved on the outer side of the lower end of the asphalt spray pipe, and the fixing clamp is screwed and fixed to the lower end of the fixing frame.

[0012] Preferably, a plurality of guide rods arranged at intervals are fixedly penetrated inside the pushing ring, a guide groove is opened on the inner wall of the rotating groove, and the end of the guide rod is slidably arranged in the guide groove.

[0013] A method for using an asphalt spreader capable of controlling the discharging speed: S1: Connect the fixed frame to the spreader, and connect multiple asphalt spray pipes to the asphalt pump so that the guide wheel contacts the ground, and then start the asphalt pump to spray asphalt through the asphalt spray pipe, the bag pipe and the asphalt spray head; S2: During the travel of the spreader, the guide wheel contacts the ground and rotates. The speed sensor determines the travel speed of the spreader at this time by detecting the speed of the guide wheel, and then transmits the speed signal to the PLC controller. The PLC controller starts and controls the control motor, and the control motor drives the worm to rotate, and with the cooperation of the worm and the worm wheel, multiple vertical rods rotate. At this time, the vertical rod drives the cam to rotate a certain angle and push the push ring, so that the push ring cooperates with the push rod to push the lifting plate, so that the lifting plate rotates and the pipe mouth of the bag pipe is expanded or reduced, thereby controlling the speed of asphalt outflow; S3: After the asphalt spraying is completed, the asphalt spray pipe can be dismantled and the internal components can be inspected and cleaned.

[0014] (III) Beneficial effects Compared with the prior art, the present invention provides an asphalt spreader capable of controlling the discharging speed and a method for using the same, which have the following beneficial effects: 1. The asphalt spreader with controllable discharging speed and the use method thereof can monitor the travel speed of the spreader through the asphalt spray pipe, guide pipe, bag pipe, lifting plate, guide wheel, speed sensor, synchronous drive mechanism and push adjustment mechanism, and change the diameter of the asphalt outlet pipe according to the actual travel speed, so that the flow rate of asphalt changes during the flow process, thereby adjusting the discharging speed, making the asphalt spraying more uniform and improving the use effect of the spreader.

[0015] 2. The asphalt spreader with controllable discharging speed and the use method thereof can adjust the asphalt flow speed while making the guide wheel always cooperate with the ground through the setting of the elastic guide mechanism, so that during the travel of the spreader, the travel speed of the spreader can be accurately detected through the cooperation of the speed sensor and the guide wheel, thereby cooperating with the PLC sensor and the synchronous drive mechanism to accurately control the lifting angle of the lifting plate, so that the diameter of the bag tube mouth can be accurately adjusted, so that the asphalt outflow speed can be accurately regulated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of an asphalt spreader capable of controlling the discharging speed and a method of using the asphalt spreader proposed by the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the mounting frame, guide wheels and elastic guide mechanism in the present invention; Figure 3 for Figure 3 A schematic diagram of the side structure of Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the asphalt nozzle; Figure 5 for Figure 4 Schematic diagram of the three-dimensional structure of the middle guide tube and the bag tube; Figure 6 for Figure 5 A magnified view of the structure of part A in the middle.

[0017] In the figure: 1 fixing frame, 2 asphalt spray pipe, 3 asphalt spray head, 4 guide pipe, 5 bag pipe, 6 fixing ring, 7 lifting plate, 8 vertical rod, 9 mounting plate, 10 mounting frame, 11 guide wheel, 12 fixing plate, 13 speed sensor, 14 fixing block, 15 cross bar, 16 torsion spring, 17 pushing ring, 18 push rod, 19 cam, 20 cam, 21 worm gear, 22 worm, 23 elastic telescopic rod, 24 support ring, 25 support rod, 26 PLC controller, 27 support seat, 28 section spray pipe, 29 connecting flange, 30 fixing clamp, 31 guide rod, 32 guide groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-6 , an asphalt spreader capable of controlling the discharging speed, comprising a fixed frame 1 fixed at the rear end of the spreader, a plurality of asphalt spray pipes 2 arranged at intervals are arranged on the upper surface of the lower end of the fixed frame 1, an asphalt spray head 3 is connected to the nozzles of the plurality of asphalt spray pipes 2, each asphalt spray pipe 2 is connected by a plurality of section spray pipes 28, two adjacent section spray pipes 28 are sealed and connected by a connecting flange 29, the section spray pipes 28 are arranged in sections, the asphalt spray pipes 2 can be disassembled, and the internal components can be quickly inspected and cleaned, a fixing clamp 30 is sleeved on the outer side of the lower end of the asphalt spray pipe 2, the fixing clamp 30 is screwed and fixed to the lower end of the fixed frame 1, the position of the asphalt spray pipe 2 can be fixed by the fixing clamp 30, and the stability of the asphalt flow process can be ensured; A guide tube 4 is fixedly provided on the inner wall of the asphalt spray pipe 2, and a bag tube 5 is fixedly provided on one end of the guide tube 4 close to the asphalt spray head 3. A fixing ring 6 is fixedly sleeved on the tube wall of the guide tube 4, and a plurality of rotating connection mechanisms are arranged symmetrically around the outer wall of the fixing ring 6, and a lifting plate 7 is provided through the rotating connection mechanism. The lower end of the lifting plate 7 is fixedly connected to the outer side of the pipe mouth of the bag tube 5, and the rotating connection mechanism includes a fixing block 14, and the fixing block 14 is fixedly provided on the outer wall of the fixing ring 6. A cross bar 15 is rotatably penetrated inside the fixing block 14, and the lifting plate 7 is rotatably sleeved with the cross bar 15, and the cross bar 15 can drive the lifting plate 7 to rotate, and a torsion spring 16 is sleeved on the rod wall of the cross bar 15, and the two ends of the torsion spring 16 are respectively fixedly connected to the cross bar 15 and the fixing block 14, and the torsion spring 16 can rotate back to the original position after the lifting plate 7 is pushed; A vertical rod 8 is rotatably provided on the wall of each asphalt spray pipe 2, the lower end of the vertical rod 8 is located inside the asphalt spray pipe 2, and a push adjustment mechanism for adjusting the contraction of the pipe opening of the bag pipe 5 is provided between the vertical rod 8 and the lifting plate 7; A mounting plate 9 is fixedly provided on the inner side of the upper end of the fixing frame 1, and a synchronous driving mechanism for driving the multiple vertical rods 8 to rotate simultaneously is provided between the mounting plate 9 and the multiple vertical rods 8; The outer side of the fixing frame 1 is fixedly provided with a mounting frame 10, and a strip hole is opened inside the mounting frame 10, and an elastic guide mechanism is provided inside the strip hole, and a guide wheel 11 is provided through the elastic guide mechanism, and the elastic guide mechanism includes an elastic telescopic rod 23, the elastic telescopic rod 23 is located inside the strip hole, and the upper end is fixedly connected to the top of the inner wall of the strip hole, and the elastic telescopic rod 23 can support the connection of the guide wheel 11 for longitudinal movement, and a support ring 24 is fixedly provided at the lower end of the elastic telescopic rod 23, and the outer wall of the support ring 24 is slidably arranged in the strip hole, and the inner part of the support ring 24 rotates through A support rod 25 is provided, and the guide wheel 11 is fixedly sleeved with the support rod 25. The support ring 24 can move longitudinally while the guide wheel 11 rotates, and is suitable for multiple road surfaces. A fixing plate 12 is fixedly provided on the upper end of the side wall of the mounting frame 10, and a speed sensor 13 is fixedly penetrated inside the fixing plate 12. The speed sensor 13 is arranged in coordination with the guide wheel 11, and the speed sensor 13 is electrically connected to the synchronous drive mechanism. The speed sensor 13 can monitor the rotation speed of the guide wheel 11, so as to judge the driving speed of the spreader, so as to facilitate accurate control of the asphalt discharge speed.

[0020] In order to enable the lifting plate 7 to be pushed stably, the opening of the bag tube 5 is enlarged or reduced, such as Figure 5-6As shown, the pushing and adjusting mechanism includes a pushing ring 17, and the outer walls of the plurality of fixed blocks 14 are provided with rotating grooves. The pushing ring 17 is rotatably sleeved inside the plurality of rotating grooves. A plurality of push rods 18 are fixedly provided on one side of the pushing ring 17 close to the lifting plate 7 and are symmetrically arranged. The push rods 18 are in contact with and cooperate with the lifting plate 7. A cam 19 is fixedly sleeved on the lower end of the vertical rod 8. The cam 19 is cooperated with the pushing ring 17. When the cam 19 rotates, the pushing ring 17 can be pushed. A plurality of guide rods 31 arranged at intervals are fixedly penetrated inside the pushing ring 17, and a guide groove 32 is provided on the inner wall of the rotating groove. The end of the guide rod 31 is slidably arranged in the guide groove 32. The sliding cooperation between the guide rod 31 and the guide groove 32 can provide limited support for the movement of the pushing ring 17.

[0021] In order to simultaneously drive multiple vertical rods 8 to rotate so that the push adjustment mechanism can operate stably, Figure 1-3 As shown, the synchronous drive mechanism includes a control motor 20, the upper ends of multiple vertical rods 8 are rotatably inserted into the interior of the mounting plate 9, the upper ends of the vertical rods 8 are fixedly sleeved with a worm gear 21, the control motor 20 is fixedly arranged on the side wall of the mounting plate 9, and a worm 22 is fixedly arranged at the end of the output shaft, the worm 22 is matched with the multiple worm gears 21, a PLC controller 26 is fixedly arranged on the upper end of the outer wall of the fixed frame 1, the PLC controller 26 is matched with the speed sensor 13 and the control motor 20, a support seat 27 is fixedly arranged on the top of the mounting plate 9, and one end of the worm 22 away from the control motor 20 is rotatably inserted into the interior of the support seat 27, the worm 22 can drive the multiple worm gears 21 to rotate simultaneously, so that the multiple vertical rods 8 rotate synchronously and drive the adjustment mechanism to operate stably.

[0022] A method for using an asphalt spreader capable of controlling the discharging speed: Before spraying asphalt, the fixing frame 1 is fixedly connected to the rear end of the spreader, and the asphalt pump inside the spreader is connected to the multiple asphalt spray pipes 2, so that when the asphalt pump is running, the asphalt can enter the multiple asphalt spray pipes 2 and finally spray out through the asphalt nozzle 3. After the fixing frame 1 and the spreader are fixedly connected, the support ring 24 drives the guide wheel 11 to contact the ground under the support of the elastic telescopic rod 23. At this time, during the driving process of the spreader, the guide wheel 11 rotates due to friction with the ground; At the beginning of the formal work, the spreader starts to move along the road surface. At this time, the guide wheel 11 rotates, and the speed of the guide wheel 11 is determined by the speed sensor 13 to judge the moving speed of the spreader at this time, and the moving speed is transmitted to the PLC sensor 26. When the PLC sensor 26 senses that the driving speed is reduced, the push adjustment mechanism can be operated to push the lifting plate 7, so that the lifting plate 7 rotates under the support of the cross bar 15. At this time, multiple lifting plates 7 rotate and pull the pipe mouth of the bag tube 5, so that the pipe mouth of the bag tube 5 spreads. At this time, the flow gap between the bag tube 5 and the guide tube 4 increases, so that the flow rate of asphalt decreases; When the travel speed of the spreader increases, the pushing force of the multiple lifting plates 7 is reduced, and under the action of the torsion force of the torsion spring 16, the multiple lifting plates 7 rotate to narrow the pipe mouth of the bag tube 5. At this time, the flow gap between the guide tube 4 and the bag tube 5 is reduced. According to the speed increase of the flowing object when it flows from a large diameter to a small diameter, the asphalt flow rate increases and the discharge rate per unit time is increased, thereby ensuring the uniformity of spraying asphalt on the road surface.

[0023] When the PLC sensor 26 receives and transmits the driving speed signal, the vertical rod 8 is driven to drive the cam 19 to rotate. At this time, the cam 19 pushes the push ring 17 while rotating slowly, and the push ring 17 drives multiple push rods 18 to move under the limit guidance of the guide rod 31 and the guide groove 32, so that the push rods 18 contact the lifting plate 7 and push the lifting plate 7, so that the lifting plate 7 rotates and the pipe opening of the bag tube 5 is enlarged or reduced; When the PLC sensor 26 receives a signal, the PLC sensor 26 operates the control motor 20 to rotate. At this time, the control motor 20 drives the worm 22 to rotate. Under the transmission cooperation of the worm 22 and the worm wheel 21, multiple worm wheels 21 drive multiple vertical rods 8 to rotate at the same time, so that the vertical rod 8 drives the cam 19 to rotate at a certain angle and control the pushing distance of the pushing ring 7, so as to accurately control the rotation angle of the lifting plate 7, ensure the accuracy of the diameter control of the bag tube 5, and improve the control accuracy of the discharge speed of the asphalt spreader.

[0024] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An asphalt spreader capable of controlling the discharging speed, comprising a fixing frame (1) fixedly arranged at the rear end of the spreader, characterized in that: A plurality of asphalt spray pipes (2) are arranged at intervals on the upper surface of the lower end of the fixing frame (1), and asphalt spray heads (3) are connected to the pipe openings of the plurality of asphalt spray pipes (2); The inner wall of the asphalt spray pipe (2) is fixedly provided with a guide pipe (4), one end of the guide pipe (4) close to the asphalt spray head (3) is fixedly provided with a bag pipe (5), the pipe wall of the guide pipe (4) is fixedly sleeved with a fixing ring (6), the outer wall of the fixing ring (6) is provided with a plurality of rotating connection mechanisms arranged in a symmetrical manner around the outer wall, and a lifting plate (7) is provided through the rotating connection mechanism, and the lower end of the lifting plate (7) is fixedly connected to the outer side of the pipe mouth of the bag pipe (5); A vertical rod (8) is rotatably inserted through the wall of each asphalt spray pipe (2), the lower end of the vertical rod (8) is located inside the asphalt spray pipe (2), and a push adjustment mechanism for adjusting the contraction of the mouth of the bag pipe (5) is provided between the vertical rod (8) and the lifting plate (7); A mounting plate (9) is fixedly provided on the inner side of the upper end of the fixing frame (1), and a synchronous driving mechanism for driving the plurality of vertical rods (8) to rotate simultaneously is provided between the mounting plate (9) and the plurality of vertical rods (8); A mounting frame (10) is fixedly provided on the outside of the fixing frame (1), a strip hole is provided inside the mounting frame (10), an elastic guide mechanism is provided inside the strip hole, and a guide wheel (11) is provided through the elastic guide mechanism, a fixing plate (12) is fixedly provided on the upper end of the side wall of the mounting frame (10), a rotation speed sensor (13) is fixedly penetrated inside the fixing plate (12), the rotation speed sensor (13) is arranged in cooperation with the guide wheel (11), and the rotation speed sensor (13) is electrically connected to the synchronous drive mechanism.

2. The asphalt spreader with controllable discharging speed according to claim 1, characterized in that: The rotation connection mechanism comprises a fixed block (14), wherein the fixed block (14) is fixedly arranged on the outer wall of the fixed ring (6), a cross bar (15) is rotatably penetrated inside the fixed block (14), the lifting plate (7) is rotatably sleeved with the cross bar (15), a torsion spring (16) is sleeved on the rod wall of the cross bar (15), and two ends of the torsion spring (16) are respectively fixedly connected to the cross bar (15) and the fixed block (14).

3. The asphalt spreader with controllable discharging speed according to claim 1, characterized in that: The push adjustment mechanism comprises a push ring (17), the outer walls of the plurality of fixed blocks (14) are provided with rotation grooves, the push ring (17) is rotatably sleeved inside the plurality of rotation grooves, a plurality of push rods (18) are fixedly provided on one side of the push ring (17) close to the lifting plate (7) and are symmetrically arranged around the push ring (17), the push rods (18) are in contact with and cooperate with the lifting plate (7), and a cam (19) is fixedly sleeved on the lower end of the vertical rod (8), and the cam (19) is arranged in cooperation with the push ring (17).

4. The asphalt spreader with controllable discharging speed according to claim 1, characterized in that: The synchronous drive mechanism comprises a control motor (20), the upper ends of the plurality of vertical rods (8) are rotatably arranged inside the mounting plate (9), the upper ends of the vertical rods (8) are fixedly sleeved with a worm gear (21), the control motor (20) is fixedly arranged on the side wall of the mounting plate (9), and a worm gear (22) is fixedly arranged at the end of the output shaft, the worm gear (22) is arranged in cooperation with the plurality of worm gears (21), a PLC controller (26) is fixedly arranged on the upper end of the outer wall of the fixed frame (1), and the PLC controller (26) is arranged in cooperation with the speed sensor (13) and the control motor (20); A support seat (27) is fixedly provided on the top of the mounting plate (9), and one end of the worm (22) away from the control motor (20) is rotatably inserted into the interior of the support seat (27).

5. The asphalt spreader capable of controlling the discharging speed according to claim 1, characterized in that: The elastic guide mechanism comprises an elastic telescopic rod (23), the elastic telescopic rod (23) being located inside the strip hole, and the upper end of the elastic telescopic rod (23) being fixedly connected to the top of the inner wall of the strip hole, the lower end of the elastic telescopic rod (23) being fixedly provided with a support ring (24), the outer wall of the support ring (24) being slidably arranged in the strip hole, a support rod (25) being rotatably penetrated inside the support ring (24), and the guide wheel (11) being fixedly sleeved with the support rod (25).

6. The asphalt spreader with controllable discharging speed according to claim 1, characterized in that: Each of the asphalt spray pipes (2) is connected by a plurality of section spray pipes (28), and two adjacent section spray pipes (28) are sealedly connected via a connecting flange (29). A fixing clamp (30) is sleeved on the outer side of the lower end of the asphalt spray pipe (2), and the fixing clamp (30) is screwed and fixed to the lower end of the fixing frame (1).

7. The asphalt spreader capable of controlling the discharging speed according to claim 3, characterized in that: A plurality of guide rods (31) arranged at intervals are fixedly penetrated inside the push ring (17), a guide groove (32) is formed on the inner wall of the rotating groove, and the end of the guide rod (31) is slidably disposed in the guide groove (32).

8. A method for using an asphalt spreader capable of controlling the discharging speed, characterized in that: The asphalt spreader with controllable discharging speed according to any one of claims 1 to 7 is used as follows: S1: Connecting the fixing frame (1) to the spreader, and connecting the plurality of asphalt spray pipes (2) to the asphalt pump, so that the guide wheel (11) is in contact with the ground, and then starting the asphalt pump so that asphalt is sprayed out through the asphalt spray pipe (2), the bag pipe (5) and the asphalt spray head (3); S2: During the travel of the spreader, the guide wheel (11) contacts the ground and rotates. The speed sensor (13) determines the travel speed of the spreader at this time by detecting the speed of the guide wheel (11), and then transmits the speed signal to the PLC controller (26). The PLC controller (26) starts and controls the control motor (20). The control motor (20) drives the worm (22) to rotate, and in cooperation with the worm (22) and the worm wheel (21), the plurality of vertical rods (8) rotate. At this time, the vertical rods (8) drive the cam (19) to rotate a certain angle and push the push ring (17), so that the push ring (17) cooperates with the push rod (18) to push the lifting plate (7), so that the lifting plate (7) rotates and the pipe opening of the bag pipe (5) is expanded or reduced, thereby controlling the speed of asphalt outflow; S3: After the asphalt spraying is completed, the asphalt spray pipe (2) can be dismantled and the internal components can be inspected and cleaned.

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