Precast beam concrete delivery device

Abstract

This invention discloses a precast beam concrete conveying device, comprising: a storage tank containing an even number of pressing pipes, each pressing pipe having a feed chute; a turntable rotatably connected to the storage tank; multiple pressing pipes spaced circumferentially along the turntable and fixedly connected to it; a support frame fixedly mounted above the storage tank; a drive device and two hydraulic jacks fixedly mounted on the support frame; the drive device driving the turntable to rotate; the movable ends of each hydraulic jack passing through the support frame and facing the pressing pipes; discharge holes corresponding to the two hydraulic jacks at the bottom of the storage tank; and multiple relay connection devices corresponding one-to-one with each pressing pipe; one end of each relay connection device being detachably connected to the movable end of the hydraulic jack, and the other end being detachably connected to the turntable. This invention enables continuous bottom-up pumping of concrete, improving the quality and efficiency of concrete pouring.

Description

Technical Field

[0001] This invention relates to the field of concrete conveying devices. More specifically, this invention relates to a precast beam concrete conveying device. Background Technology

[0002] Currently, concrete pouring operations for precast beam construction typically utilize placing booms or buckets. In precast beam structures with high reinforcement ratios, the top-to-bottom pouring method encounters densely tied reinforcing bars and pipes, causing the already mixed concrete to break up and segregate. This requires remixing under gravity, affecting the concrete's density and resulting in poor workability. Furthermore, the vibration quality of precast beam structures with high reinforcement ratios is often difficult to guarantee. Consequently, the final quality and appearance of the structural concrete are not ideal. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0004] To achieve these objectives and other advantages according to the present invention, a precast beam concrete conveying device is provided, comprising:

[0005] A storage bin has a feed inlet on its top surface; the storage bin contains an even number of pressing pipes, each of which has a feed groove.

[0006] The turntable has a notch on the top surface of the storage box that matches the turntable, and the turntable is rotatably connected to the storage box; a plurality of pressing tubes are evenly spaced along the circumference of the turntable and are fixedly connected to the turntable; and a through hole is provided on the turntable corresponding to each pressing tube.

[0007] A support frame is fixedly installed above the storage box; a drive device and two oil tops are fixedly installed on the support frame; the drive device is used to drive the turntable to rotate; the two oil tops correspond to any two pressing pipes located on the same diameter, and the movable end of each oil top passes through the support frame and faces the pressing pipe; the bottom of the storage box is provided with discharge holes corresponding to the two oil tops, and the two discharge holes are respectively connected to conveying pipes;

[0008] Multiple relay connection devices are provided, each corresponding to one of the pressing pipes; one end of each relay connection device is detachably connected to the movable end of the hydraulic jack, and the other end is detachably connected to the turntable; the movable ends of the two hydraulic jacks press down to drive the corresponding relay connection device to extend into the pressing pipe, pressing the concrete in the pressing pipe into the conveying pipe.

[0009] Preferably, the driving device includes a driving unit, a transmission wheel set, and a central column; the central column is fixedly mounted on the turntable and coaxially arranged with the turntable; the driving unit drives the central column to rotate through the transmission wheel set.

[0010] Preferably, the transmission wheel assembly includes a rotating shaft, a dial, a grooved wheel disc, and meshing driving and driven gears; the driving gear is fixedly mounted on the output shaft of the drive device, the rotating shaft is rotatably connected to the turntable, and the driven gear and the dial are both fixedly mounted on the rotating shaft; the grooved wheel disc is fixedly mounted on the central column, and the dial is configured to cooperate with the grooved wheel disc; the grooved wheel disc has a plurality of radial grooves evenly distributed on it, and the number of radial grooves is the same as the number of pressure tubes.

[0011] Preferably, the feed trough is arranged along the longitudinal length of the pressing tube.

[0012] Preferably, the relay connection device includes an annular base, an outer sleeve, an upper connecting device, a lower connecting device, and a venting device; the outer diameter of the annular base is the same as the inner diameter of the pressure tube; the outer sleeve is fixedly mounted on the annular base, and its outer diameter is smaller than that of the annular base; a vent is provided on the outer sleeve near the annular base; the venting device is movably mounted inside the outer sleeve and connected to the movable end of the oil jack through the upper connecting device; the vent is closed when the movable end of the oil jack is pressed down, and opened when the movable end of the oil jack is raised; the upper connecting device is located at the top of the outer sleeve for detachable connection to the movable end of the oil jack; the lower connecting device is located on the outer periphery of the annular base for detachable connection to the turntable.

[0013] Preferably, a pusher block is provided on the outer periphery of the annular base corresponding to the feed groove of the pressure tube, and the cross-sectional shape of the pusher block matches the cross-sectional shape of the feed groove.

[0014] Preferably, the venting device includes an inner sleeve and a movable column; the outer diameter of the inner sleeve is the same as the inner diameter of the outer sleeve, and it is fixedly disposed inside the outer sleeve. Two slots are formed on the bottom surface of the inner sleeve, and the two slots are symmetrically arranged about the center of the inner sleeve. The movable column is disposed inside the inner sleeve and its length is greater than the length of the inner sleeve. An upper end block and a lower end block are respectively provided at both ends of the movable column. The diameter of the upper end block is the same as the outer diameter of the outer sleeve, and the diameter of the lower end block is the same as the inner diameter of the outer sleeve. Two pins are provided on the lower end block corresponding to the two slots. When the bottom surface of the upper end block abuts against the top surface of the inner sleeve, the lower end block precisely closes the vent hole.

[0015] Preferably, the two movable ends of the oil caps are fixedly connected to a connecting post, and the upper connecting device includes an upper positioning ring; the upper positioning ring is fixedly connected to the upper end block, and a plurality of protrusions are spaced apart on the top of its inner ring surface; the outer periphery of the connecting post is provided with a matching insert corresponding to the gap between each pair of adjacent protrusions.

[0016] Preferably, the lower connecting device includes an arc-shaped groove and a top post disposed on the outer periphery of the annular base. The arc-shaped groove extends obliquely downward along the circumference from the upper end of the annular base. A groove is formed on the inner wall of the through hole. One end of the top post extends into the groove and the other end extends into the arc-shaped groove. A spring is disposed between the top post and the inner wall of the groove.

[0017] Preferably, a one-way valve is provided at one end of the conveying pipe near the storage tank.

[0018] The present invention has at least the following beneficial effects:

[0019] The precast beam concrete conveying device provided by this invention provides pressure for concrete conveying through two hydraulic cylinders, enabling concrete to be poured from bottom to top through the bottom mold of the precast beam into the precast beam formwork, avoiding concrete segregation and ensuring the quality of concrete pouring; through the cooperation of the drive device, turntable, and various pressure pipes and relay connection devices, continuous pumping of concrete is achieved, improving the concrete pouring speed.

[0020] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the precast beam concrete conveying device of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the driving device described in this invention;

[0023] Figure 3 for Figure 2 A magnified view of part A;

[0024] Figure 4 This is a schematic diagram of the structure of the pressure tube described in this invention;

[0025] Figure 5 This is a schematic diagram of the relay connection device described in this invention;

[0026] Figure 6 This is a schematic diagram of the structure of the movable column described in this invention;

[0027] Figure 7This is a schematic diagram of the structure of the inner sleeve described in this invention;

[0028] Figure 8 This is a schematic diagram of the structure of the upper connecting device described in this invention;

[0029] Figure 9 This is a schematic diagram of the structure of the top column described in this invention; Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0031] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] like Figure 1 As shown, the present invention provides a precast beam concrete conveying device, comprising:

[0033] The storage bin 1 has a feed inlet 11 on its top surface; the storage bin 1 is provided with an even number of pressing pipes 7, and each pressing pipe 7 has a feed groove 71.

[0034] Turntable 2, the top surface of the storage box 1 is provided with a notch that matches the turntable 2, and the turntable 2 is rotatably connected to the storage box 1; a plurality of pressing tubes 7 are evenly spaced along the circumference of the turntable 2 and are fixedly connected to the turntable 2; a through hole 21 is provided on the turntable 2 corresponding to each pressing tube 7;

[0035] A support frame 3 is fixedly installed above the storage tank 1; a drive device 5 and two oil pressure pipes 4 are fixedly installed on the support frame 3; the drive device 5 is used to drive the turntable 2 to rotate; the two oil pressure pipes 4 correspond to any two pressing pipes 7 located on the same diameter, and the movable end of each oil pressure pipe 4 passes through the support frame 3 and faces the pressing pipe 7; the bottom of the storage tank 1 is provided with discharge holes corresponding to the two oil pressure pipes 4, and the two discharge holes are respectively connected to conveying pipes;

[0036] Multiple relay connection devices 6 are provided, each corresponding to one of the pressing pipes 7; one end of each relay connection device 6 is detachably connected to the movable end of the hydraulic jack 4, and the other end is detachably connected to the turntable; the movable ends of the two hydraulic jacks 4 are pressed down to drive the corresponding relay connection device 6 to extend into the pressing pipe 7, pressing the concrete in the pressing pipe 7 into the conveying pipe.

[0037] In this technical solution, the mixed concrete is first poured into the storage tank 1 through the feed inlet 11, and then enters the pressing pipes 7 through the feed troughs 71. The diameter of the through hole 21 is not less than the diameter of the pressing pipe 7, and preferably, the diameter of the through hole 21 is the same as the diameter of the pressing pipe 7. When each of the relay connection devices 6 is connected to the turntable 2, the drive device 5 drives the turntable 2 to rotate, and the turntable 2 will drive each pressing pipe 7 and each relay connection device 6 to rotate synchronously. The two conveying pipes can be connected to a common conduit pipe, which connects to the grouting port on the bottom formwork of the precast beam.

[0038] In the initial state, each of the pressure pipes 7 is already filled with concrete. The process of the precast beam concrete conveying device conveying concrete includes:

[0039] S1. Connect the relay connection device 6 below the two oil caps 4 to the movable end of the oil cap 4 only, and then start the two oil caps 4 at the same time. The movable ends of the two oil caps 4 press down to drive the corresponding relay connection device 6 to extend into the corresponding pressing pipe 7, press the concrete in the pressing pipe 7 into the conveying pipe, and inject the concrete from the bottom formwork of the precast beam upward through the conveying pipe.

[0040] S2. After the concrete in the pressing pipe 7 is completely pressed into the conveying pipe, the oil jack 4 drives the relay connection device 6 to rise. When the relay connection device 6 returns to the top of the corresponding through hole 21, it is disconnected from the oil jack 4 and connected to the turntable 2.

[0041] S3. Start the drive device 5 to drive the turntable 2 to rotate until the next pair of two pressure tubes 7 on the same diameter are located below the two oil caps 4. Then disconnect the relay connection device 6 above the two pressure tubes 7 from the turntable 2 and connect it to the movable end of the corresponding oil cap 4.

[0042] S4. Repeat steps S1-S3 until the predetermined concrete injection is completed.

[0043] During the above process, after the pressure pipe 7, which has already completed its injection, rotates away from below the hydraulic jack 4, the concrete in the storage tank 1 continues to be filled into the pressure pipe 7 through the corresponding feed chute 71. Therefore, by rotating the turntable 2, the above process can be repeated continuously to inject concrete. It should be noted that each hydraulic jack 4 is equipped with a conventional hydraulic pump, hydraulic pipeline, and synchronous control system to enable the movable end of the hydraulic jack 4 to perform downward and upward movements. Preferably, a spiral blade is also provided at the bottom of the turntable 2. During the rotation of the turntable 2, the spiral blade stirs the concrete in the storage tank 1.

[0044] In another embodiment, such as Figure 2 and Figure 3 As shown, the driving device 5 includes a driving device 51, a transmission wheel set 52, and a central column 53; the central column 53 is fixedly mounted on the turntable 2 and is coaxially arranged with the turntable 2; the driving device 51 drives the central column 53 to rotate through the transmission wheel set 52, thereby driving the turntable 2 to rotate. The driving device 51 can be a combination of a conventional electric motor and a reducer.

[0045] The transmission wheel assembly 52 includes a rotating shaft 522, a dial 524, a grooved wheel 525, and a meshing drive gear 521 and a driven gear 523. The drive gear 521 is fixedly sleeved on the output shaft of the drive device 51. The rotating shaft 522 is rotatably connected to the turntable 2. The driven gear 523 and the dial 524 are both fixedly sleeved on the rotating shaft 522. The grooved wheel 525 is fixedly sleeved on the central column 53. The dial 524 is configured to cooperate with the grooved wheel 525. The grooved wheel 525 has a plurality of radial grooves evenly distributed on it. The number of radial grooves is the same as the number of pressure tubes 7.

[0046] In the above technical solution, the grooved wheel 525 and the dial 524 together constitute a grooved wheel mechanism. The driving device 51 drives the driving gear 521 to rotate, which in turn drives the rotating shaft 522 and the dial 524 to rotate via the driven gear 523. When the dial 524 rotates one revolution, the lever on it moves from one radial groove to the next, thereby driving the grooved wheel 525 to rotate 360° / n, where n is the number of radial grooves. Since the number of radial grooves is the same as the number of pressure tubes 7, when the dial 524 rotates one revolution, it corresponds exactly to the rotation of the turntable 2 in step S3 above, where the next pair of pressure tubes 7 located on the same diameter are located below the two oil tops 4.

[0047] In another embodiment, such as Figure 4As shown, the feed trough 71 is arranged along the longitudinal length of the pressing pipe 7. The continuous feed trough 71 can ensure the efficiency of concrete refilling into the pressing pipe 7.

[0048] In another embodiment, such as Figure 5 As shown, the relay connection device 6 includes an annular base 62, an outer sleeve 63, an upper connecting device 65, a lower connecting device 61, and a venting device 64. The outer diameter of the annular base 62 is the same as the inner diameter of the pressure tube 7. The outer sleeve 63 is fixedly mounted on the annular base 62, and its outer diameter is smaller than that of the annular base 62. A vent hole 631 is provided on the outer sleeve 63 near the annular base 62. The venting device 64 is movably mounted inside the outer sleeve 63 and is connected to the movable end of the oil pressure 4 through the upper connecting device 65. When the movable end of the oil pressure 4 is pressed down, the vent hole 631 is closed, and when the movable end of the oil pressure 4 is raised, the vent hole 631 is opened. The upper connecting device 65 is located at the top of the outer sleeve 63 and is detachably connected to the movable end of the oil pressure 4. The lower connecting device 61 is located on the outer periphery of the annular base 62 and is detachably connected to the turntable 2.

[0049] In the above technical solution, the upper connecting device 65 and the lower connecting device 61 respectively connect to the movable end of the hydraulic jack 4 and the turntable 2. The vent 631 is used to introduce air into the pressure pipe 7 during the retraction of the hydraulic jack 4, preventing the concrete in the conveying pipe from being drawn back into the pressure pipe 7 during the retraction of the hydraulic jack 4. The outer diameter of the outer sleeve 63 is smaller than the outer diameter of the annular base 62, so that a gap is formed between the inner wall of the pressure pipe 7 and the outer sleeve 63, thereby allowing air to enter the vent 631. Preferably, two vents 631 can be symmetrically opened about the center of the outer sleeve 63 to increase the air intake efficiency.

[0050] Furthermore, a pusher block 621 is provided on the outer periphery of the annular base 62 corresponding to the feed groove 71 of the pressure pipe 7. The cross-sectional shape of the pusher block 621 matches the cross-sectional shape of the feed groove 71. The pusher block 621 prevents concrete in the pressure pipe 7 from flowing out of the feed groove 71 during concrete injection, thus ensuring the efficiency of concrete injection.

[0051] Furthermore, such as Figure 6 and Figure 7As shown, the ventilation device 64 includes an inner sleeve 645 and a movable column 642. The outer diameter of the inner sleeve 645 is the same as the inner diameter of the outer sleeve 63, and it is fixedly disposed inside the outer sleeve 63. Two slots 646 are opened on the bottom surface of the inner sleeve 63, and the two slots 646 are symmetrically arranged about the center of the inner sleeve 645. The movable column 642 is disposed inside the inner sleeve 645 and its length is greater than the length of the inner sleeve 645. An upper end block 641 and a lower end block 643 are respectively provided at both ends of the movable column 642. The diameter of the upper end block 641 is the same as the outer diameter of the outer sleeve 63, and the diameter of the lower end block 643 is the same as the inner diameter of the outer sleeve 631. Two pins 644 are provided on the lower end block 643 corresponding to the two slots 646. When the bottom surface of the upper end block 641 abuts against the top surface of the outer sleeve 63, the lower end block 643 just closes the ventilation hole 631.

[0052] The length of the movable column 642 is greater than the length of the inner sleeve 645, therefore the movable column 642 can move up and down relative to the inner sleeve 645. The upper end block 641 is connected to the movable end of the oil cap 4 through the upper connecting device 65. During the downward pressing process, the bottom surface of the upper end block 641 abuts against the top surface of the outer sleeve 63, driving the entire relay connecting device 6 to move down. At this time, the pin 644 is separated from the corresponding slot 646, and the lower end block 643 closes the vent hole 631. During the upward lifting process of the oil cap 4, the movable column 642 first moves up a distance relative to the inner sleeve 645 until the pin 644 plugs into the corresponding slot 646. At this time, the top surface of the lower end block 643 abuts against the bottom surface of the inner sleeve 645 and completely leaves the vent hole 631, exposing the vent hole 631.

[0053] Furthermore, such as Figure 8 As shown, the movable ends of the two oil caps 4 are fixedly connected to a connecting post 654, and the upper connecting device 65 includes an upper positioning ring 651; the upper positioning ring 651 is fixedly connected to the upper end block 641, and a plurality of protrusions 652 are spaced apart on the top of the inner ring surface of the upper positioning ring 651; the outer periphery of the connecting post 654 is provided with a corresponding insert 653 corresponding to the gap between each two adjacent protrusions 652.

[0054] When each of the inserts 653 is positioned precisely between the two protrusions 652, the area formed by the connecting post 654, each insert 653, and each protrusion 652 on the horizontal plane is exactly the area of ​​the inner circular surface of the upper positioning ring 651. The upper positioning ring 651 is fixedly connected to the upper end block 641. When the movable end of the oil cap 4 is pressed down, the connecting post 654 presses the movable post 642 down until the bottom surface of the upper end block 641 abuts against the top surface of the outer sleeve 63, thereby driving the entire relay connection device 6 to move downward.

[0055] Furthermore, such as Figure 9 As shown, the lower connecting device 61 includes an arc-shaped groove 611 and a top post 612 disposed on the outer periphery of the annular base 62. The arc-shaped groove 611 extends obliquely downward from the upper end of the annular base 62 along its circumference. A groove is provided on the inner wall of the corresponding through hole. One end of the top post 612 extends into the groove, and the other end extends into the arc-shaped groove 611. A spring 613 is disposed between the top post 612 and the inner wall of the groove.

[0056] Under the action of the spring 613, one end of the top post 612 abuts against the arc-shaped groove 611, as shown in the reference. Figure 5 and Figure 9 If the arc-shaped slide 611 is set clockwise and downward, when the top post 612 is located at one end of the arc-shaped slide 611 near the top of the annular base 62, the relay connection device 6 is connected to the turntable 2 through the top post 612, and the relay connection device 6 can rotate together with the turntable 2 at any time.

[0057] When the movable end of the oil cap 4 is pressed down, each of the insert blocks 653 inserts between the corresponding two protrusions 652 and abuts against the upper end block 641, driving the movable column 642 down until the bottom surface of the upper end block 641 abuts against the upper end surface of the outer sleeve 63, and pushing the entire relay connecting device 6 down. At this time, the relay connecting device 6 rotates counterclockwise under the action of the top column 612 until the top column 612 reaches the other end of the arc-shaped slide groove 611, and at the same time, each of the protrusions 652 rotates to above the corresponding insert block 653. The oil cap 4 further overcomes the force of the spring 613 and drives the relay connecting device 6 down into the pressure tube 7. When the movable end of the oil cap 4 rises, the relay connection device 6 is driven to rise by the contact between the top surface of each of the inserts 653 and the top surface of each of the protrusions 652. The movable column 642 will first move up a certain distance with the upper positioning ring 651 until the pin 644 is inserted into the corresponding slot 646. At this time, the vent 631 is opened, and the top surface of the lower end block 643 abuts against the bottom surface of the inner sleeve 645, which can drive the entire relay connection device 6 to move up together. When the top post 612 moves upward and re-enters the arc-shaped slide groove 611, the relay connection device 6 will rotate clockwise under the action of the top post 612 until the top post 612 is located at one end of the arc-shaped slide groove 611 near the top of the annular base 62, connecting the relay connection device 6 to the turntable 2. Simultaneously, each of the insert blocks 653 rotates between the two protrusions 652. As the movable end of the oil cap 4 moves further upward, the connecting post 654 separates from the upper positioning ring 651, thereby separating the oil cap 4 from the relay connection device 6. Preferably, multiple lower connecting devices 61 are spaced apart circumferentially along the annular base 62 to improve the stability of the relay connection device 6. The length of the arc-shaped slide groove 611 is set such that when the top post 612 moves from one end of the arc-shaped slide groove 611 to the other end, each of the protrusions 652 rotates to above the insert block 653 or completely moves away from above the insert block 653. When the arc-shaped chute 611 is set counterclockwise and obliquely downward, the rotation direction of the relay connection device 6 is opposite to the above process.

[0058] In another embodiment, a one-way valve is provided at one end of the delivery pipe near the storage tank 1. This one-way valve prevents concrete from flowing back into the storage tank 1 under pressure differential during non-injection periods.

[0059] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A precast beam concrete conveying device, characterized in that, include: A storage bin has a feed inlet on its top surface; the storage bin contains an even number of pressing pipes, each of which has a feed groove. The turntable has a notch on the top surface of the storage box that matches the turntable, and the turntable is rotatably connected to the storage box; a plurality of pressing tubes are evenly spaced along the circumference of the turntable and are fixedly connected to the turntable; and a through hole is provided on the turntable corresponding to each pressing tube. A support frame is fixedly installed above the storage box; a drive device and two oil tops are fixedly installed on the support frame; the drive device is used to drive the turntable to rotate; the two oil tops correspond to any two pressing pipes located on the same diameter, and the movable end of each oil top passes through the support frame and faces the pressing pipe; the bottom of the storage box is provided with discharge holes corresponding to the two oil tops, and the two discharge holes are respectively connected to conveying pipes; Multiple relay connection devices are provided, each corresponding to one of the pressing pipes; one end of each relay connection device is detachably connected to the movable end of the hydraulic jack, and the other end is detachably connected to the turntable; the movable ends of the two hydraulic jacks press down to drive the corresponding relay connection device to extend into the pressing pipe, pressing the concrete in the pressing pipe into the conveying pipe; The relay connection device includes an annular base, an outer sleeve, an upper connecting device, a lower connecting device, and a venting device. The outer diameter of the annular base is the same as the inner diameter of the pressure tube. The outer sleeve is fixedly mounted on the annular base, and its outer diameter is smaller than that of the annular base. A venting hole is provided on the outer sleeve near the annular base. The venting device is movably mounted inside the outer sleeve and is connected to the movable end of the oil jack through the upper connecting device. The venting hole is closed when the movable end of the oil jack is pressed down, and opened when the movable end of the oil jack is raised. The upper connecting device is located at the top of the outer sleeve and is detachably connected to the movable end of the oil jack. The lower connecting device is located on the outer periphery of the annular base and is detachably connected to the turntable.

2. The precast beam concrete conveying device as described in claim 1, characterized in that, The driving device includes a driving unit, a transmission wheel set, and a central column; the central column is fixedly mounted on the turntable and is coaxial with the turntable; the driving unit drives the central column to rotate through the transmission wheel set.

3. The precast beam concrete conveying device as described in claim 2, characterized in that, The transmission wheel assembly includes a rotating shaft, a dial, a grooved wheel disc, and meshing drive and driven gears; the drive gear is fixedly mounted on the output shaft of the drive device, the rotating shaft is rotatably connected to the turntable, and the driven gear and the dial are both fixedly mounted on the rotating shaft; the grooved wheel disc is fixedly mounted on the central column, and the dial is configured to cooperate with the grooved wheel disc; the grooved wheel disc has a plurality of radial grooves evenly distributed on it, and the number of radial grooves is the same as the number of pressure tubes.

4. The precast beam concrete conveying device as described in claim 1, characterized in that, The feed trough is arranged along the longitudinal length of the pressing tube.

5. The precast beam concrete conveying device as described in claim 1, characterized in that, A pusher block is provided on the outer periphery of the annular base corresponding to the feed groove of the pressure tube, and the cross-sectional shape of the pusher block matches the cross-sectional shape of the feed groove.

6. The precast beam concrete conveying device as described in claim 1, characterized in that, The ventilation device includes an inner sleeve and a movable column. The outer diameter of the inner sleeve is the same as the inner diameter of the outer sleeve and is fixedly disposed inside the outer sleeve. Two slots are formed on the bottom surface of the inner sleeve, and the two slots are symmetrically arranged about the center of the inner sleeve. The movable column is disposed inside the inner sleeve and its length is greater than the length of the inner sleeve. An upper end block and a lower end block are respectively provided at both ends of the movable column. The diameter of the upper end block is the same as the outer diameter of the outer sleeve, and the diameter of the lower end block is the same as the inner diameter of the outer sleeve. Two pins are provided on the lower end block corresponding to the two slots. When the bottom surface of the upper end block abuts against the top surface of the inner sleeve, the lower end block just closes the ventilation hole.

7. The precast beam concrete conveying device as described in claim 6, characterized in that, The two movable ends of the oil caps are fixedly connected to a connecting post, and the upper connecting device includes an upper positioning ring; the upper positioning ring is fixedly connected to the upper end block, and a plurality of protrusions are spaced apart on the top of its inner ring surface; the outer periphery of the connecting post is provided with a matching insert corresponding to the gap between each pair of adjacent protrusions.

8. The precast beam concrete conveying device as described in claim 7, characterized in that, The lower connecting device includes an arc-shaped groove and a top post disposed on the outer periphery of the annular base. The arc-shaped groove extends obliquely downward from the upper end of the annular base along its circumference. A groove is provided on the inner wall of the through hole. One end of the top post extends into the groove and the other end extends into the arc-shaped groove. A spring is disposed between the top post and the inner wall of the groove.

9. The precast beam concrete conveying device as described in claim 1, characterized in that, A one-way valve is installed at one end of the conveying pipe near the storage tank.

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