Intermittent feeding device for double-wall corrugated pipe production

Abstract

The invention relates to the technical field of corrugated pipe production, in particular to an intermittent feeding device for double-wall corrugated pipe production, which comprises a rack and two hoppers for intermittent feeding, an annular conveying belt is arranged on the rack, two symmetrical mounting seats are arranged on the working surface of the annular conveying belt, and the hoppers are mounted on the mounting seats; vertical discharging nozzles are arranged at the bottoms of the hoppers, plugging plates extending along the moving paths of the hoppers are arranged on the machine frame, through holes are formed in the plugging plates, extruding machines are installed on the plugging plates and located below the through holes, a lifting frame is arranged on the machine frame, an extruding block and a stirrer are arranged at the two ends of the lifting frame respectively, and the extruding block and the stirrer are inserted into the two hoppers respectively. According to the technical scheme, the two hoppers are driven by the annular conveying belt to move synchronously to exchange positions, intermittent feeding of raw materials can be achieved in the position exchange process of the hoppers, and the feeding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated pipe production, in particular to an intermittent feeding device for producing double-wall corrugated pipes. Background Art

[0002] Double-wall corrugated pipe is a new type of pipe with an annular outer wall and a smooth inner wall. The existing double-wall corrugated pipe feeding method is to introduce the mixed plastic particles into the processing equipment and finally extrude them into the mold to form a tube.

[0003] Chinese patent CN218231028U discloses an intermittent double-wall corrugated pipe feeding device, comprising a corrugated pipe and a tank body, wherein a stirring mechanism is arranged inside the tank body; the stirring mechanism comprises a motor arranged outside the tank body, a transmission gear is fixedly mounted on the output shaft of the motor, a first driven gear and a second driven gear are meshed on the outside of the transmission gear, and a first stirring rod extending outside the first driven gear is fixedly mounted inside the first driven gear.

[0004] The intermittent double-wall corrugated pipe feeding device needs to inject materials into the tank body for stirring before feeding during operation. Due to the single number of tank bodies, intermittent feeding requires waiting for the staff to complete the addition and stirring of materials before subsequent feeding can be carried out. The intermittent time is long, resulting in low efficiency, and the feeding time interval cannot be guaranteed to be the same, affecting the continuity of intermittent feeding. Summary of the invention

[0005] In view of the above problems, it is necessary to provide an intermittent feeding device for the production of double-wall corrugated pipes to address the problems of the prior art.

[0006] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0007] An intermittent feeding device for producing double-wall corrugated pipes comprises a frame and two hoppers for intermittent feeding, an endless conveyor belt is arranged on the frame, two transmission shaft rotating shafts of the endless conveyor belt are arranged vertically, two symmetrical mounting seats are arranged on the working surface of the endless conveyor belt, and the hopper is mounted on the mounting seats; a vertical discharge nozzle is arranged at the bottom of the hopper, a sealing plate extending along the moving path of the hopper is arranged on the frame, the bottom of the discharge nozzle is in contact with the surface of the sealing plate, a through hole is arranged on the sealing plate, an extruder is installed below the sealing plate located at the through hole, and the discharge nozzle of the hopper moves to the through hole and is in the same straight line with the axis of the through hole; a lifting frame and a first linear drive driving the lifting frame to move in the vertical direction are arranged on the frame, extrusion blocks and agitators are respectively arranged at both ends of the lifting frame, and the extrusion blocks and agitators are respectively inserted into the two hoppers; a rotary drive unit is arranged on the frame, and the rotary drive unit drives and connects the transmission shaft and the agitator of the endless conveyor belt.

[0008] Preferably, the rotation driving unit includes a rotation driver fixedly mounted on the frame, the rotation axis of the rotation driver is in the same straight line with the axis line of one of the transmission shafts, an axial hole is coaxially arranged on the transmission shaft, a rotating base and a lifting base are coaxially mounted on the working end of the rotation driver, an insertion cylinder is coaxially arranged on the upper side of the rotation base, a sleeve is arranged at the bottom of the lifting base, the sleeve is sleeved on the insertion cylinder, a groove is arranged on the peripheral side of the outer wall of the insertion cylinder, and a clamping strip inserted in the groove is arranged on the inner wall of the sleeve; a spring is arranged in the insertion cylinder, the spring elastically connects the insertion cylinder and the sleeve, the spring applies elastic force to move the lifting base upward, and when the lifting base moves upward, the lifting base transmission connects to the transmission shaft.

[0009] Preferably, a rotating block is coaxially arranged at the bottom of the transmission shaft which is on the same axis as the lifting base, and a plurality of mounting holes arranged around the axis of the transmission shaft are arranged on the rotating block, and a connecting column is coaxially installed in the mounting hole; a plurality of sockets are arranged on the lifting base, the axis of the sockets is on the same straight line as the axis of the mounting holes, and the diameter of the sockets is the same as the diameter of the connecting column.

[0010] Preferably, the length of the connecting column is smaller than the length of the mounting hole, and the connecting column protrudes from the lower surface of the rotating block.

[0011] Preferably, an extension shaft is coaxially arranged on the lifting base, the extension shaft is vertically inserted into the axial hole of the transmission shaft and extends to the top of the transmission shaft, and a second friction disk is coaxially arranged on the top of the extension shaft; a first synchronous wheel is coaxially arranged on the top of the agitator, and a second synchronous wheel is also rotatably mounted on the lifting frame, the axis of the second synchronous wheel is on the same straight line as the axis of the extension shaft, the first synchronous wheel and the second synchronous wheel are connected by a synchronous belt transmission, a first friction disk is coaxially arranged on the bottom of the second synchronous wheel, and the first linear drive drives the lifting frame to move downward so that the first friction disk contacts the second friction disk and presses down the lifting base.

[0012] Preferably, a plurality of bars are arranged on the upper surface of the second friction disc, and a plurality of clamping columns are arranged on the bottom of the first friction disc.

[0013] Preferably, a lifting nozzle is coaxially installed inside the discharge nozzle at the bottom of the hopper, the outer wall of the lifting nozzle fits the inner wall of the discharge nozzle, a conical surface is arranged at the bottom of the lifting nozzle, the conical surface has a taper that gradually decreases downward, and a limiting ring is arranged on the inner wall of the discharge nozzle.

[0014] Preferably, a second linear drive is fixedly mounted on the lifting frame, a working end of the second linear drive is arranged to move in a vertical direction, the working end of the second linear drive is fixedly connected to the extrusion block, and the second linear drive drives the extrusion block to move in the vertical direction.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Firstly, an annular conveyor belt is arranged on the frame in the present invention, and the annular conveyor belt can drive the two hoppers to move synchronously and exchange positions. When the hopper loaded with raw materials moves to the through hole of the sealing plate, the raw materials in the hopper enter the extruder through the through hole. The extruder injects the raw materials into the forming mold of the double-wall corrugated pipe. At the same time, the hopper on the other side receives new raw materials, thereby realizing intermittent feeding of raw materials, facilitating and accurately controlling the time interval of feeding and the amount of feeding each time, so as to ensure the continuity of production and product quality.

[0017] Secondly, when one of the hoppers of the intermittent feeding device of the present invention is feeding, the other hopper has already received new raw materials, and the raw materials in the hopper are stirred by the agitator, so that the raw materials can be directly fed after being moved to the top of the extruder. The shortest time for intermittent feeding is only the time for the hopper to change position, which is convenient for improving processing efficiency.

[0018] Thirdly, the transmission shaft and the agitator of the ring conveyor belt in the present invention are driven by a rotary drive unit. After the agitator enters the hopper, the rotary drive unit drives the agitator to rotate and simultaneously cuts off the transmission connection with the ring conveyor belt to keep the hopper in a stationary position. After the agitator leaves the hopper, the transmission connection with the ring conveyor belt is automatically restored to drive the hopper to change position. The change of the two transmission connection states does not require manual control, thereby ensuring the automatic operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a stereoscopic view of an intermittent feeding device for producing double-wall corrugated pipes in a first working state;

[0020] Figure 2 It is a side view of an intermittent feeding device for producing double-wall corrugated pipes in a first working state;

[0021] Figure 3 yes Figure 2 Cross-sectional view at AA of FIG.

[0022] Figure 4 yes Figure 3 A partial enlarged view of point B;

[0023] Figure 5 yes Figure 3 A partial enlarged view of point C;

[0024] Figure 6 It is a front view of an intermittent feeding device for producing double-wall corrugated pipes in the first working state;

[0025] Figure 7 yes Figure 6 Cross-sectional view at DD of FIG.

[0026] Figure 8 yes Figure 7 A local enlarged view of point E;

[0027] Fig. 9 It is a three-dimensional intermittent feeding device for double-wall corrugated pipe production in the second working state. Figure 1 ;

[0028] Fig.10 yes Fig. 9 A partial enlarged view of point F;

[0029] Fig.11 It is a three-dimensional intermittent feeding device for double-wall corrugated pipe production in the second working state. Figure 2 ;

[0030] Fig.12 yes Fig.11 A partial enlarged view of point G.

[0031] The numbers in the figure are: 1, frame; 11, blocking plate; 111, through hole; 112, extruder; 12, lifting frame; 121, extrusion block; 122, stirrer; 123, first synchronous wheel; 124, second synchronous wheel; 125, synchronous belt; 126, first friction disk; 127, clamping column; 128, second linear drive; 13, first linear drive; 2, hopper; 21, discharge nozzle; 211, lifting nozzle; 212, cone Surface; 213, limit ring; 3, ring conveyor belt; 31, transmission shaft; 311, shaft hole; 312, rotating block; 313, mounting hole; 314, connecting column; 32, mounting seat; 4, rotation drive unit; 41, rotation drive; 42, rotating base; 421, insert cylinder; 422, spring; 43, lifting base; 431, sleeve; 432, socket; 433, extension shaft; 434, second friction plate; 435, gear bar. DETAILED DESCRIPTION

[0032] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Reference Figures 1 to 12 :

[0034] An intermittent feeding device for producing double-wall corrugated pipes, comprising a frame 1 and two hoppers 2 for intermittent feeding, an endless conveyor belt 3 is arranged on the frame 1, two transmission shafts 31 of the endless conveyor belt 3 are arranged vertically, two symmetrical mounting seats 32 are arranged on the working surface of the endless conveyor belt 3, and the hopper 2 is mounted on the mounting seats 32; a vertical discharge nozzle 21 is arranged at the bottom of the hopper 2, a blocking plate 11 extending along the moving path of the hopper 2 is arranged on the frame 1, the bottom of the discharge nozzle 21 is in contact with the surface of the blocking plate 11, the blocking plate 11 is provided with a through hole 111, and the blocking plate 11 An extruder 112 is installed below the through hole 111, and the discharge nozzle 21 of the hopper 2 moves to the through hole 111 and is in the same straight line with the axis of the through hole 111; a lifting frame 12 and a first linear drive 13 for driving the lifting frame 12 to move in a vertical direction are arranged on the frame 1, and an extrusion block 121 and an agitator 122 are respectively arranged at both ends of the lifting frame 12, and the extrusion block 121 and the agitator 122 are respectively inserted into the two hoppers 2; a rotation drive unit 4 is arranged on the frame 1, and the rotation drive unit 4 transmits and connects the transmission shaft 31 and the agitator 122 of the ring conveyor belt 3.

[0035] During production of the feeding device in the present application, the ring conveyor belt 3 can drive the two hoppers 2 to move so that one of the hoppers 2 is located under the output end of the raw material conveyor. The ring conveyor belt 3 in this embodiment can be a chain plate conveyor belt or other equipment. The two transmission shafts 31 of the ring conveyor belt 3 are arranged vertically to ensure that the hopper 2 can translate in the horizontal direction; when the raw material enters the hopper 2, the discharge nozzle 21 at the bottom of the hopper 2 is in contact with the upper surface of the sealing plate 11, so that the raw material will not leak. At this time, the discharge nozzle 21 at the bottom of the other hopper 2 is located at the through hole 111 of the sealing plate 11, aligned with the input end of the extruder 112 under the sealing plate 11, and then the ring conveyor belt 3 can drive the two hoppers 2 to move synchronously and exchange positions. When the hopper 2 loaded with raw materials moves to the through hole 111 of the sealing plate 11, the raw materials in the hopper 2 enter the extruder 112 through the through hole 111, and the extruder 112 injects the raw materials into the forming mold of the double-wall corrugated pipe to form the double-wall corrugated pipe. The frame 1 is also provided with a lifting frame 12. The first linear drive 13 that drives the lifting frame 12 to lift can be a cylinder or an electric push rod. When the endless conveyor belt 3 drives the hopper 2 to move to the specified position, the first linear drive 13 drives the lifting frame 12 to descend. The extrusion block 121 at one end of the lifting frame 12 enters the hopper 2 located above the extruder 112. During the downward movement of the extrusion block 121, the raw materials in the hopper 2 are pushed into the extruder 112 through the discharge nozzle 21. At the same time, the agitator 122 at the other end of the lifting frame 12 enters the hopper 2 located at the output end of the raw material conveyor to stir and mix the raw materials in the hopper 2. In this embodiment, the frame 1 is provided with a rotating drive unit 4, which can be connected to the transmission shaft 31 of the endless conveyor belt 3 to drive the endless conveyor belt 3 to rotate and drive the hopper 2 to move. The hopper 2 can realize intermittent feeding of raw materials during the process of exchanging positions, which is convenient for the production and processing of double-wall corrugated pipes.

[0036] In order to solve the problem of how the rotation drive unit 4 drives the transmission shaft 31 to rotate, the following features are specifically set:

[0037] The rotation driving unit 4 includes a rotation driving unit 41 fixedly mounted on the frame 1, the rotation axis of the rotation driving unit 41 is in the same straight line with the axis line of one of the transmission shafts 31, an axial hole 311 is coaxially arranged on the transmission shaft 31, a rotation base 42 and a lifting base 43 are coaxially mounted on the working end of the rotation driving unit 41, an insert cylinder 421 is coaxially arranged on the upper side of the rotation base 42, a sleeve 431 is arranged at the bottom of the lifting base 43, the sleeve 431 is sleeved on the insert cylinder 421, a card groove is arranged on the outer wall side of the insert cylinder 421, and a card strip inserted in the card groove is arranged on the inner wall of the sleeve 431; a spring 422 is arranged in the insert cylinder 421, the spring 422 elastically connects the insert cylinder 421 and the sleeve 431, the spring 422 applies elastic force to move the lifting base 43 upward, and when the lifting base 43 moves upward, the lifting base 43 is transmission-connected to the transmission shaft 31.

[0038] A rotating block 312 is coaxially arranged at the bottom of the transmission shaft 31 which is on the same axis as the lifting base 43. The rotating block 312 is provided with a plurality of mounting holes 313 arranged around the axis of the transmission shaft 31, and a connecting column 314 is coaxially installed in the mounting hole 313; a plurality of plug holes 432 are provided on the lifting base 43, and the axis of the plug holes 432 is on the same straight line as the axis of the mounting hole 313, and the diameter of the plug holes 432 is the same as the diameter of the connecting column 314.

[0039] The length of the connecting column 314 is smaller than the length of the mounting hole 313 , and the connecting column 314 protrudes from the lower surface of the rotating block 312 .

[0040] The rotary drive unit 4 in this embodiment includes only one rotary drive 41 as a power source. The rotary drive 41 can be a servo motor. The rotary drive 41 is fixedly mounted on the frame 1 and keeps the rotary axis of the rotary drive 41 on the same axis as one of the transmission shafts 31. The rotary base 42 and the lifting base 43 installed at the working end of the rotary drive 41 are connected through the plug 421 and the sleeve 431. The card strip arranged on the inner wall of the sleeve 431 is inserted into the card groove arranged on the outer wall of the plug 421. Therefore, the lifting base 43 can maintain synchronous rotation with the rotary base 42. The spring 422 in the plug 421 applies elastic force to the lifting base 43 to move upward. The lifting base 43 moves up to the rotating block 312 that contacts the bottom of the transmission shaft 31. The connecting column 314 on the rotary block 312 is inserted into the socket 432 on the lifting base 43. When the base 43 rotates, it can drive the transmission shaft 31 to rotate, so that the endless conveyor belt 3 drives the hopper 2 to move and change its position. The connecting column 314 at the bottom of the rotating block 312 in this embodiment is inserted into the mounting hole 313. Since the length of the mounting hole 313 is greater than the length of the connecting column 314, when the lifting base 43 is not in contact with the rotating block 312, the connecting column 314 protrudes from the bottom surface of the rotating block 312 due to gravity. When the lifting base 43 is in contact with the rotating block 312, if the connecting column 314 and the insertion hole 432 are not in the same straight line, the connecting column 314 can be pushed into the mounting hole 313 by the lifting base 43. When the lifting base 43 rotates until the mounting hole 313 and the insertion hole 432 are in the same straight line, the connecting column 314 can be moved down and inserted into the insertion hole 432, thereby realizing the transmission connection between the lifting base 43 and the transmission shaft 31.

[0041] In order to solve the problem of how the rotary drive unit 4 drives the agitator 122 on the lifting frame 12 to rotate and keeps the position of the hopper 2 unchanged during the rotation of the agitator 122, the following features are specifically set:

[0042] An extension shaft 433 is coaxially arranged on the lifting base 43, and the extension shaft 433 is vertically inserted into the shaft hole 311 of the transmission shaft 31 and extends to the top of the transmission shaft 31, and a second friction disk 434 is coaxially arranged on the top of the extension shaft 433; a first synchronous wheel 123 is coaxially arranged on the top of the agitator 122, and a second synchronous wheel 124 is also rotatably installed on the lifting frame 12, and the axis of the second synchronous wheel 124 is on the same straight line as the axis of the extension shaft 433. The first synchronous wheel 123 and the second synchronous wheel 124 are connected by a synchronous belt 125, and a first friction disk 126 is coaxially arranged at the bottom of the second synchronous wheel 124. The first linear drive 13 drives the lifting frame 12 to move downward so that the first friction disk 126 contacts the second friction disk 434 and presses down the lifting base 43.

[0043] The extension shaft 433 provided on the upper side of the lifting base 43 in this embodiment is inserted into the shaft hole 311 on the transmission shaft 31 and extends to the top of the transmission shaft 31. The second friction disk 434 on the top of the extension shaft 433 rotates with the lifting base 43. The agitator 122 is rotatably mounted on the lifting frame 12. The top of the lifting frame 12 is provided with a first synchronous wheel 123. The first synchronous wheel 123 is connected to the second synchronous wheel 124 rotatably mounted on the lifting frame 12 through a synchronous belt 125. In this embodiment, the second synchronous wheel 124 is on the same straight line as the axis of the transmission shaft 31. Therefore, when the first linear drive 13 drives the lifting frame 12 to move downward, the agitator 122 is rotated. When the agitator 122 enters the hopper 2, the first friction disk 126 at the bottom of the second synchronous wheel 124 also approaches the second friction disk 434. When the agitator 122 completely enters the hopper 2, the first friction disk 126 contacts the second friction disk 434 and presses the second friction disk 434 downward. The second friction disk 434 drives the compression spring 422 of the lifting base 43 to move downward. The lifting base 43 moves downward to make the connecting column 314 disengage from the socket 432. Therefore, in the subsequent process of the rotary driver 41 driving the agitator 122 to rotate, the annular conveyor belt 3 will not be driven to drive the hopper 2 to adjust its position, thereby ensuring the stability of the position of the hopper 2. When the first linear drive 13 drives the lifting frame 12 to move upward, the transmission shaft 31 is reconnected with the lifting base 43, and the second friction disk 434 is separated from the first friction disk 126. Therefore, in the subsequent process of the annular conveyor belt 3 driving the hopper 2 to move, the agitator 122 will not rotate. In this embodiment, only one rotary drive 41 is used as a power source to drive the rotation of the annular conveyor belt 3 and the agitator 122 respectively, and the rotation of the annular conveyor belt 3 and the agitator 122 is performed independently to ensure working needs.

[0044] In order to ensure that the second friction disk 434 can stably drive the agitator 122 to rotate when in contact with the first friction disk 126, the following features are specifically provided:

[0045] A plurality of stop bars 435 are disposed on the upper surface of the second friction disc 434 , and a plurality of clamping columns 127 are disposed on the bottom of the first friction disc 126 .

[0046] In this embodiment, a plurality of clamping columns 127 are arranged at the bottom of the first friction disk 126. When the second friction disk 434 contacts the first friction disk 126, the clamping column 127 is inserted between two adjacent gear bars 435 on the upper side of the second friction disk 434. Therefore, when the subsequent rotary driver 41 drives the lifting base 43 to rotate, the gear bar 435 contacts the clamping column 127 and drives the second friction disk 434 and the first friction disk 126 to rotate synchronously. The friction force between the first friction disk 126 and the second friction disk 434 ensures that the agitator 122 can overcome the resistance of the material in the agitator hopper 2 and rotate.

[0047] In order to solve the problem of how to ensure that the material in the hopper 2 can completely enter the input end of the extruder 112 without being attached to the side wall of the through hole 111, the following features are specifically set:

[0048] A lifting nozzle 211 is coaxially installed in the discharge nozzle 21 at the bottom of the hopper 2, and the outer wall of the lifting nozzle 211 is in contact with the inner wall of the discharge nozzle 21 (such as Figure 5 As shown), a conical surface 212 is provided at the bottom of the lifting nozzle 211, and the conical surface 212 has a taper that gradually decreases downward, and a limiting ring 213 is provided on the inner wall of the discharge nozzle 21.

[0049] In this embodiment, a movable lifting nozzle 211 is also installed in the discharge nozzle 21 of the hopper 2. The lifting nozzle 211 fits against the limiting ring 213 on the inner wall of the discharge nozzle 21 under the action of gravity. When the discharge nozzle 21 and the through hole 111 are in the same straight line, the lifting nozzle 211 is inserted into the through hole 111, and the material in the hopper 2 is injected into the input end of the extruder 112 through the lifting nozzle 211 under the extrusion of the extrusion block 121. The conical surface 212 at the bottom of the lifting nozzle 211 can prevent the material from contacting the side wall of the through hole 111. When the endless conveyor belt 3 drives the hopper 2 to change its position, the outer wall of the conical surface 212 of the lifting nozzle 211 contacts the side wall of the through hole 111, so that the lifting nozzle 211 is retracted into the discharge nozzle 21 when subjected to force, making it convenient for the hopper 2 to move.

[0050] In order to solve the problem of how to ensure that the squeezing block 121 squeezes the material in the hopper 2, the following features are specifically set:

[0051] A second linear driver 128 is fixedly mounted on the lifting frame 12 . The working end of the second linear driver 128 is arranged to move in the vertical direction. The working end of the second linear driver 128 is fixedly connected to the extrusion block 121 . The second linear driver 128 drives the extrusion block 121 to move in the vertical direction.

[0052] The lifting frame 12 in this embodiment is also provided with a second linear drive 128 for driving the extrusion block 121 to move in the vertical direction. The second linear drive 128 can be an oil cylinder, a pneumatic cylinder or an electric push rod, etc. When the first linear drive 13 drives the lifting frame 12 to move downward, the second linear drive 128 drives the extrusion block 121 to move up to the highest position. Therefore, when the rotary drive unit 4 drives the agitator 122 to stir the material, the material in the hopper 2 can be pushed into the extruder 112. Subsequently, when the first linear drive 13 drives the lifting frame 12 to move upward, the second linear drive 128 can drive the extrusion block 121 to move up to the highest position, so that the extrusion block 121 can be separated from the hopper 2 faster.

[0053] Working principle: During production, the rotary drive unit 4 first drives the transmission shaft 31 connected to the annular conveyor belt 3, and the annular conveyor belt 3 can drive the two hoppers 2 to move so that one of the hoppers 2 is located under the output end of the raw material conveyor. Then the annular conveyor belt 3 can drive the two hoppers 2 to move synchronously and exchange positions. When the hopper 2 loaded with raw materials moves to the through hole 111 of the blocking plate 11, the first linear drive 13 drives the lifting frame 12 to descend, and the extrusion block 121 at one end of the lifting frame 12 enters the hopper 2 located above the extruder 112. During the downward movement of the extrusion block 121, the raw material in the hopper 2 is pushed through the discharge port. The nozzle 21 enters the extruder 112, and the extruder 112 injects raw materials into the forming mold of the double-wall corrugated pipe to process the double-wall corrugated pipe. At the same time, the raw material conveying device inputs raw materials into another hopper 2, and the agitator 122 is in the hopper 2. The rotary drive unit 4 drives the agitator 122 to rotate and stir the raw materials in the hopper 2. When the raw materials in the hopper 2 are completely injected into the extruder 112, the first linear drive 13 drives the lifting frame 12 to move upward to make the extrusion block 121 and the agitator 122 separate from the two hoppers 2, and the annular conveyor belt 3 drives the hopper 2 to change position to realize intermittent feeding of raw materials.

[0054] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. An intermittent feeding device for producing double-wall corrugated pipes, comprising a frame (1) and two hoppers (2) for intermittent feeding, characterized in that: An annular conveyor belt (3) is arranged on the frame (1), the two transmission shafts (31) of the annular conveyor belt (3) are arranged with their rotating shafts vertically, two symmetrical mounting seats (32) are arranged on the working surface of the annular conveyor belt (3), and the hopper (2) is mounted on the mounting seats (32); A vertical discharge nozzle (21) is arranged at the bottom of the hopper (2); a blocking plate (11) extending along the moving path of the hopper (2) is arranged on the frame (1); the bottom of the discharge nozzle (21) is in contact with the surface of the blocking plate (11); a through hole (111) is arranged on the blocking plate (11); an extruder (112) is installed below the through hole (111) on the blocking plate (11); the discharge nozzle (21) of the hopper (2) moves to the through hole (111) and is in the same straight line with the axis of the through hole (111); A lifting frame (12) and a first linear drive (13) for driving the lifting frame (12) to move in a vertical direction are arranged on the frame (1), and an extrusion block (121) and an agitator (122) are respectively arranged at two ends of the lifting frame (12), and the extrusion block (121) and the agitator (122) are respectively inserted into two hoppers (2); A rotation drive unit (4) is arranged on the frame (1), and the rotation drive unit (4) is connected to a transmission shaft (31) of the annular conveyor belt (3) and an agitator (122).

2. An intermittent feeding device for producing double-wall corrugated pipes according to claim 1, characterized in that: The rotary drive unit (4) comprises a rotary drive (41) fixedly mounted on the frame (1); the rotary axis of the rotary drive (41) is on the same straight line as the axis of one of the transmission shafts (31); an axial hole (311) is coaxially arranged on the transmission shaft (31); a rotary base (42) and a lifting base (43) are coaxially mounted on the working end of the rotary drive (41); an inserting sleeve (421) is coaxially arranged on the upper side of the rotary base (42); a sleeve (431) is arranged at the bottom of the lifting base (43); the sleeve (431) is sleeved on the inserting sleeve (421); a slot is arranged on the outer wall of the inserting sleeve (421); and a clip strip inserted into the slot is arranged on the inner wall of the sleeve (431); A spring (422) is arranged in the inserting tube (421), and the spring (422) elastically connects the inserting tube (421) and the sleeve (431). The spring (422) applies elastic force to move the lifting base (43) upward. When the lifting base (43) moves upward, the lifting base (43) is transmission-connected to the transmission shaft (31).

3. An intermittent feeding device for producing double-wall corrugated pipes according to claim 2, characterized in that: A rotating block (312) is coaxially arranged at the bottom of the transmission shaft (31) on the same axis as the lifting base (43); a plurality of mounting holes (313) arranged around the axis of the transmission shaft (31) are arranged on the rotating block (312); and a connecting column (314) is coaxially installed in the mounting hole (313); The lifting base (43) is provided with a plurality of plug holes (432), the axes of the plug holes (432) and the axes of the mounting holes (313) are on the same straight line, and the diameter of the plug holes (432) is the same as the diameter of the connecting column (314).

4. An intermittent feeding device for producing double-wall corrugated pipes according to claim 3, characterized in that: The length of the connecting column (314) is smaller than the length of the mounting hole (313), and the connecting column (314) protrudes from the lower surface of the rotating block (312).

5. An intermittent feeding device for producing double-wall corrugated pipes according to claim 4, characterized in that: An extension shaft (433) is coaxially arranged on the lifting base (43), the extension shaft (433) is vertically inserted into the shaft hole (311) of the transmission shaft (31) and extends to the top of the transmission shaft (31), and a second friction disk (434) is coaxially arranged on the top of the extension shaft (433); A first synchronous wheel (123) is coaxially arranged at the top of the stirrer (122), and a second synchronous wheel (124) is rotatably mounted on the lifting frame (12), the axis of the second synchronous wheel (124) and the axis of the extension shaft (433) are on the same straight line, the first synchronous wheel (123) and the second synchronous wheel (124) are connected by a synchronous belt (125), and a first friction disk (126) is coaxially arranged at the bottom of the second synchronous wheel (124), and the first linear drive (13) drives the lifting frame (12) to move downward so that the first friction disk (126) contacts the second friction disk (434) and presses down the lifting base (43).

6. An intermittent feeding device for producing double-wall corrugated pipes according to claim 5, characterized in that: A plurality of stop bars (435) are arranged on the upper surface of the second friction disc (434), and a plurality of clamping columns (127) are arranged on the bottom of the first friction disc (126).

7. An intermittent feeding device for producing double-wall corrugated pipes according to claim 1, characterized in that: A lifting nozzle (211) is coaxially installed inside the discharge nozzle (21) at the bottom of the hopper (2), the outer wall of the lifting nozzle (211) fits the inner wall of the discharge nozzle (21), a conical surface (212) is arranged at the bottom of the lifting nozzle (211), the conical surface (212) has a taper that gradually decreases downwards, and a limiting ring (213) is arranged on the inner wall of the discharge nozzle (21).

8. The intermittent feeding device for producing double-wall corrugated pipes according to claim 1, characterized in that: A second linear drive (128) is fixedly mounted on the lifting frame (12); a working end of the second linear drive (128) is arranged to move in a vertical direction; the working end of the second linear drive (128) is fixedly connected to an extrusion block (121); and the second linear drive (128) drives the extrusion block (121) to move in a vertical direction.

Images