Gate seat type concrete spreader

Abstract

The invention relates to the technical field of concrete pouring, and particularly discloses a gate seat type concrete spreader which comprises a gate type machine seat, and the gate type machine seat is connected with a vertical lifting mechanism for lifting concrete from the bottom of the gate type machine seat to the top of the gate type machine seat; a swing mechanism is installed on the top of the door type machine base, a material distributing arm and a pitching adjusting structure for adjusting the material distributing arm are installed on the swing mechanism, a discharging conveying belt is arranged along the material distributing arm, one end of the discharging conveying belt is communicated with an outlet of the vertical lifting mechanism, and the pitching adjusting mechanism is connected with the discharging conveying belt through a hanging steel wire rope. The gradient of the unloading conveying belt is adjusted; a discharging trolley is installed on the discharging conveying belt, the discharging trolley is pulled through a first pulling rope, and a first pulling device controls the first pulling rope. The problems that in the background technology, when the gradient of an existing conveying belt is large, high-slump concrete cannot be conveyed, and low-slump concrete with large-diameter aggregate cannot be conveyed are solved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete pouring, and in particular to a portal concrete placing boom. Background Art

[0002] The concrete pouring operation for a dam is quite large, requiring large-scale equipment capable of covering a wide area. The significance of using large-scale equipment lies in the fact that, in large-scale dam construction, conventional small-scale equipment cannot cover a large area at once. Large-scale equipment is required to accelerate construction, improve work efficiency, and ensure uniform pouring quality. Such large-scale equipment can deliver concrete over longer distances and a larger area, reducing the number of equipment moves and thus improving overall pouring efficiency. Portal-type concrete placing booms can cover a larger working area, delivering concrete over longer distances and a larger area, reducing the number of equipment moves and thus improving overall pouring efficiency.

[0003] Concrete gradation: The higher the concrete gradation, the larger the aggregate particle diameter of the concrete components, and the lower the cost of concrete of the same strength.

[0004] Concrete slump: The higher the slump, the more fluid the concrete is; the lower the slump, the less fluid the concrete is.

[0005] Existing large-scale concrete pouring equipment uses high-grade, low-slump concrete, as dam concrete pouring operations often take place on the dam's slope. Low-slump concrete is strong and low-cost, but it's also resistant to flow and contains large-diameter aggregate, which cannot pass through the pump pipe and easily rolls and separates. Therefore, pump-type concrete pouring equipment is not suitable for concrete containing large-diameter aggregate. During the pouring process, if conventional conveyor belts are used, the high-slump concrete tends to flow downward due to the dam's slope. Therefore, the large-particle aggregate used in dams will naturally roll down the conveyor belt, causing concrete segregation. This requires the conveyor belt to be able to prevent large-diameter aggregate from rolling away. Summary of the Invention

[0006] The object of the present invention is to provide a portal concrete placing boom to solve the problem in the background art that the existing conveyor belt cannot convey high slump concrete when the slope is large, nor can it convey low slump concrete with large diameter aggregate.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: A portal concrete placing boom comprises a portal base, which is connected to a vertical lifting mechanism for lifting concrete from the bottom of the portal base to the top of the portal base; a slewing mechanism is installed on the top of the portal base, on which a placing arm and a pitch adjustment structure for adjusting the placing arm are installed, a discharge conveyor belt is arranged along the placing arm, one end of the discharge conveyor belt is connected to the outlet of the vertical lifting mechanism, and the pitch adjustment structure is connected to the discharge conveyor belt by a hanging steel wire rope to adjust the slope of the discharge conveyor belt; a discharge trolley is installed on the discharge conveyor belt, and the discharge trolley is towed by a first traction rope, and the first traction device controls the first traction rope to adjust the position of the discharge trolley on the discharge conveyor belt.

[0008] Furthermore, the unloading trolley includes two side plates, which are connected by a first conveying roller, a second conveying roller and a third conveying roller; the first conveying roller is located at the rear end of the side plate, the second conveying roller is located at the front end of the side plate, and the third conveying roller is located in the middle of the side plate, and the height of the second conveying roller is higher than that of the third conveying roller; the unloading conveyor belt first bypasses the first conveying roller, bypasses the second conveying roller, and then bypasses the third conveying roller, and then extends forward, so that the unloading conveyor belt has a height difference at the position of the unloading trolley; it also includes a conical unloading plate, which is installed at the front end of the side plate and is located below the second conveying roller, which is used to guide the concrete dropped at the position of the second conveying roller from both sides of the unloading conveyor belt, and then drop the concrete to the construction area to complete the laying.

[0009] Furthermore, it also includes a descending pipe, which is located below the unloading conveyor belt and directly below the conical unloading plate. The concrete falling from both sides of the conical unloading plate falls into the descending pipe and drops from the bottom of the descending pipe to the construction area; the descending pipe is controlled by a second traction rope and a second traction device.

[0010] Furthermore, first baffles are provided on both sides of the unloading conveyor belt, and multiple first partitions are provided on the unloading conveyor belt along the conveying direction, and there is a gap between the first partition and the first baffles on both sides; the first conveying roller and the third conveying roller are respectively set as a pair of support rollers, the diameters of the first conveying roller, the second conveying roller and the third conveying roller are the same, and the diameter of the support roller is larger than the diameter of the first conveying roller; along the first conveying roller, the space between the pair of support rollers is used for the passage of the first baffle, and the space facing outwards of the support rollers on both sides is used for the passage of the first baffle, and the support rollers are used to support the unloading conveyor belt; the setting position and function of the support roller on the third conveying roller are the same as those of the first conveying roller.

[0011] Furthermore, the vertical lifting mechanism includes a main conveyor belt and an auxiliary conveyor belt; the main conveyor belt is restricted by multiple fourth conveyor rollers to make the main conveyor belt Z-shaped as a whole, and the auxiliary conveyor belt is restricted by multiple fifth conveyor belts to make the auxiliary conveyor belt L-shaped as a whole; multiple second partitions are arranged along the conveying direction of the main conveyor belt, and second baffles are installed on both sides of the main conveyor belt; multiple third partitions are arranged along the conveying direction of the auxiliary conveyor belt, and third baffles are installed on both sides of the auxiliary conveyor belt; the vertical section of the main conveyor belt and the vertical section of the auxiliary conveyor belt are arranged opposite to each other, so that the main conveyor belt, the second baffle, the auxiliary conveyor belt and the third baffle form a relatively closed space in the vertical section, thereby completing the vertical lifting of the concrete; the fourth conveyor roller and the fifth conveyor roller are respectively provided with a pair of support rollers, the diameters of the fourth conveyor roller and the fifth conveyor roller are the same, and the diameter of the support roller is larger than the diameter of the fourth conveyor roller.

[0012] Furthermore, the tops of the plurality of second partitions are connected by a chain; and the tops of the plurality of third partitions are connected by another chain.

[0013] Furthermore, the rotating mechanism includes a rotating platform and a drive motor. A through hole is provided inside the rotating platform, and the through hole is used for the vertical lifting mechanism to pass through; a counterweight is also installed on the rotating platform.

[0014] Furthermore, the pitch adjustment structure includes a tripod rear leg and a tripod front leg, the tops of the tripod rear leg and the tripod front leg are fixedly connected, the bottom plates of the tripod rear leg and the tripod front leg are installed on the rotating mechanism to form a triangle, and a fixed pulley group is installed on the top of the tripod rear leg. It also includes an adjusting arm, which is located between the tripod front leg and the unloading conveyor belt, and the adjusting arm is fixedly connected to the fabric arm. The suspension wire rope is connected to the adjusting arm, and a movable pulley group is installed on the top of the adjusting arm; it also includes an adjusting wire rope, which is connected to the winch on the rotating platform after winding around the fixed pulley group and the movable pulley group for several turns.

[0015] Furthermore, a transfer conveyor belt is provided between the outlet of the vertical lifting mechanism and the inlet of the unloading conveyor belt.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. This invention uses a gantry as its foundation, starting from which concrete is transported. A vertical lifting mechanism lifts the concrete to the top of the gantry. The pitch adjustment mechanism adjusts the placement boom's pitch angle, allowing the placement boom and discharge conveyor to adjust to the dam's slope. The discharge conveyor, used to transport concrete, ensures that the placement boom covers the entire dam's range, thereby ensuring that the discharge conveyor's transport range covers the dam.

[0017] 2. During the unloading process, a unloading trolley is used to assist in unloading. The unloading trolley and the unloading conveyor belt are controlled separately. The position of the unloading trolley on the unloading conveyor belt can be adjusted. By controlling the position of the unloading trolley on the unloading conveyor belt, the position of the concrete unloading to the dam can be adjusted, and then the concrete spreading process can cover the dam under remote control.

[0018] 3. Due to the height difference formed at the position of the second conveyor roller, the concrete here will fall directly downward from the position of the second conveyor roller. The conical unloading plate arranged under the second conveyor roller will guide the concrete to both sides of the unloading conveyor belt. After guidance, the concrete falls downward from both sides of the unloading conveyor belt, thereby completing the unloading control at any position of the unloading conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The first state diagram of the present invention is set up.

[0020] Figure 2 The second state diagram of the present invention is constructed.

[0021] Figure 3 The third state diagram of the present invention is set up.

[0022] Figure 4 A fourth state diagram of the present invention.

[0023] Figure 5 This is a cross-sectional view from the front of the unloading trolley.

[0024] Figure 6 This is a top view of the unloading trolley.

[0025] Figure 7 2 is a diagram showing the relative positions of the first conveying roller, the second conveying roller, and the third conveying roller.

[0026] Figure 8 This is a three-dimensional diagram of a conical unloading plate.

[0027] Figure 9 This is the structural diagram of the vertical lifting mechanism.

[0028] Figure 10 It is a cross-sectional view of the vertical lifting mechanism.

[0029] Figure 11 Side view of the main conveyor belt.

[0030] Figure 12 for Figure 11 A magnified view of .

[0031] The meanings of the numbers in the figure are: 1-gantry base, 2-roller, 3-vertical lifting mechanism, 31-main conveyor belt, 311-second partition, 312-second baffle, 313-fourth conveyor roller, 32-auxiliary conveyor belt, 321-third partition, 322-third baffle, 323-fifth conveyor roller, 33-chain, 4-rotating mechanism, 5-pitch adjustment structure, 50-tripod rear leg, 51-tripod front leg, 52-fixed pulley block, 53-adjusting steel Wire rope, 54-movable pulley set, 55-adjusting arm, 56-winch, 6-closing arm, 61-conveyor belt, 62-unloading trolley, 621-side plate, 622-first conveyor roller, 623-second conveyor roller, 624-third conveyor roller, 625-conical unloading plate, 626-first partition, 627-first baffle, 628-first traction rope, 63-suspension wire rope, 64-descending tube, 641-second traction rope, 7-counterweight, 8-transfer conveyor belt. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention, so as to have a further understanding of the concept of the present invention, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0033] like Figure 1-Figure 5 As shown, a portal concrete placing boom includes a portal base 1, which is connected to a vertical lifting mechanism 3 for lifting concrete from the bottom of the portal base 1 to the top of the portal base 1; a slewing mechanism 4 is installed on the top of the portal base 1, and a placing arm 6 and a pitch adjustment structure 5 for adjusting the placing arm 6 are installed on the slewing mechanism 4; a discharge conveyor belt is provided along the placing arm 6, one end of the discharge conveyor belt is connected to the outlet of the vertical lifting mechanism 3, and the pitch adjustment structure 5 is connected to the discharge conveyor belt by a hanging wire rope 63 to adjust the slope of the discharge conveyor belt; a discharge trolley 62 is installed on the discharge conveyor belt, and the discharge trolley 62 is towed by a first traction rope 628. The first traction device controls the first traction rope to adjust the position of the discharge trolley 62 on the discharge conveyor belt.

[0034] The present invention is applied to dam concrete pouring operations. Dam operations are characterized by a wide construction range and a slope. The concrete used in the dam has a high grade, that is, the aggregate particles of the concrete components have a large diameter. The highly graded concrete cannot pass through the pump pipe, so the pumping concrete pouring equipment is not suitable for concrete containing aggregates with large diameters.

[0035] The present invention uses a gantry base 1 as its foundation, with concrete transported from the gantry base 1 as its starting point. A vertical lifting mechanism 3 is used to lift the concrete to the top of the gantry base 1. The pitch adjustment mechanism 5 adjusts the pitch angle of the distribution arm 6, allowing the inclination angles of the distribution arm 6 and the discharge conveyor to adapt to the slope of the dam. The discharge conveyor is used to transport concrete, ensuring that the distribution arm 6 covers the entire dam area, thereby ensuring that the discharge conveyor's transport range covers the dam. During the unloading process, a discharge trolley 62 assists in unloading. The trolley 62 and the discharge conveyor are independently controlled, and the position of the trolley 62 on the discharge conveyor is adjustable. By controlling the position of the trolley 62 on the discharge conveyor, the position of the concrete discharged onto the dam is adjusted, allowing remote control to ensure that the concrete distribution process covers the entire dam.

[0036] like Figure 6-Figure 8 As shown, further, the unloading trolley 62 includes two side plates 621, and the two side plates 621 are connected by a first conveying roller 622, a second conveying roller 623 and a third conveying roller 624; the first conveying roller 622 is located at the rear end of the side plate 621, the second conveying roller 623 is located at the front end of the side plate 621, and the third conveying roller 624 is located in the middle of the side plate 621, and the second conveying roller 623 is set at a higher height than the third conveying roller 624; the unloading conveyor belt first passes around the first conveying roller 622, passes around the second conveying roller 623, and then passes around the third conveying roller 624, and then extends forward, so that the unloading conveyor belt has a height difference at the position of the unloading trolley 62; it also includes a conical unloading plate 625, which is installed at the front end of the side plate 621 and is located below the second conveying roller 623, and is used to guide the concrete dropped at the position of the second conveying roller 623 from both sides of the unloading conveyor belt, and then drop the concrete to the construction area to complete the material distribution. The unloading trolley 62 is formed into a whole by two side plates 621, a first conveying roller 622, a second conveying roller 623 and a third conveying roller 624. The unloading conveyor belt needs to pass around the first conveying roller 622, the second conveying roller 623 and the third conveying roller 624 in sequence, thereby forming a structure with a height difference at the position of the second conveying roller 623. Since the unloading trolley 62 is independently controlled by the first traction rope 628 and the first traction device, the movement of the unloading conveyor belt will not affect the position of the unloading trolley 62; due to the height difference formed at the position of the second conveying roller 623, the concrete here will fall directly downward from the position of the second conveying roller 623, and the conical unloading plate 625 arranged under the second conveying roller 623 guides the concrete to both sides of the unloading conveyor belt. After guidance, the concrete falls downward from both sides of the unloading conveyor belt, thereby completing the unloading control at any position of the unloading conveyor belt.

[0037] Furthermore, it also includes a descending pipe 64, which is located below the discharge conveyor belt and directly below the conical discharge plate 625. Concrete falling from both sides of the conical discharge plate 625 falls into the descending pipe 64 and drops from the bottom of the descending pipe 64 to the construction area. The descending pipe 64 is controlled by a second traction rope 641 and a second traction device. The descending pipe 64 is also called a descending chute. The descending chute is a device used for vertical transportation. It is mainly composed of a pipe, a bracket, and a buffer device inside the pipe. The working principle of the descending chute is to control the falling speed of concrete in the pipe through gravity and the buffer device to ensure that no surge occurs during the transportation of concrete. The upper end of the descending pipe 64 is funnel-shaped. The width of the funnel is greater than the width of the discharge conveyor belt, so that the concrete can fall into the descending pipe 64 when it falls from both sides of the discharge conveyor belt under the guidance of the conical discharge plate 625. The descending tube 64 is independently controlled by a second traction rope 641 and a second traction device, ensuring that it moves simultaneously with the discharge cart 62 and that the descending tube 64 always remains below the conical discharge plate 625. The second traction device and the first traction device herein can be various electronically controlled devices, such as a linear motor controlling the second traction rope 641 or the first traction rope 628 to move along a preset track. The first traction rope 628 and the second traction rope 641 are configured similarly to conventional conveyor belts. After guide posts are installed at each end, the two ends of the first traction rope 628 are wrapped around the guide posts to complete the preset track. Note: The first traction rope 628 and the second traction rope 641 form tracks at different locations.

[0038] Furthermore, first baffles 627 are provided on both sides of the unloading conveyor belt, and multiple first partitions 626 are provided on the unloading conveyor belt along the conveying direction, and there is a gap between the first partition 626 and the first baffles 627 on both sides; the first conveying roller 622 and the third conveying roller 624 are respectively provided with a pair of support rollers, the diameters of the first conveying roller 622, the second conveying roller 623 and the third conveying roller 624 are the same, and the diameter of the support roller is larger than the diameter of the first conveying roller 622; along the first conveying roller 622, the space between the pair of support rollers is used for the passage of the first baffle 626, and the space outward of the support rollers on both sides is used for the passage of the first baffle 627, and the support rollers are used to support the unloading conveyor belt; the setting position and function of the support rollers on the third conveying roller 624 are the same as those of the first conveying roller 622.

[0039] In addition to its high gradation, the concrete used in the dam also has a high slump. Concrete with a high slump tends to flow downward during transportation. Therefore, the dam's slope determines the concrete's performance. A steeper dam slope can easily cause the concrete to slide off the conveyor belt. The conveyor belt of the present invention is equipped with multiple first baffles 626 to prevent concrete from flowing downward, and first baffles 627 to prevent concrete from falling off the sides of the discharge conveyor belt. These first baffles 627 are not integral; the discharge conveyor belt is comprised of multiple individual sections. These multiple first baffles 627 are positioned at either end of the individual sections, following the conveyor belt as it travels. Due to the provision of the first partition 626 and the first baffle 627, conventional straight stick-shaped conveying rollers cannot support the side of the unloading conveyor belt with the first partition 626 and the first baffle 627, and will collide with the first partition 626 and the first baffle 627. The first conveying roller 622 and the third conveying roller 624 in the present invention act on the surface of the unloading conveyor belt where the first partition 626 and the first baffle 627 are located, and a collision will occur. Therefore, a pair of support rollers are respectively provided at the inner positions at both ends of the first conveying roller 622 and the third conveying roller 624. The brackets of the support rollers are relatively large and can directly support the unloading conveyor belt at the gap between the first partition 626 and the first baffles 627 on both sides, and the space between the two support rollers can allow the first partition 626 to pass through, and the space facing outwards of the support rollers on both sides, that is, the positions at both ends of the first conveying roller 622, can allow the first baffle 627 to pass through. The use of first partition 626 and first baffle 627 solves the problem of concrete sliding when the slope of the dam is steep, and also avoids interference between first partition 626 and first baffle 627 and first conveyor roller 622 and third conveyor roller 624. Note: Second conveyor roller 623 is supported on the lower surface of the upper layer of the discharge conveyor and does not contact first partition 626 and first baffle 627. Therefore, second conveyor roller 623 does not need to be equipped with a support roller.

[0040] like Figures 9-12As shown, further, the vertical lifting mechanism 3 includes a main conveyor belt 31 and an auxiliary conveyor belt 32; the main conveyor belt 31 is restricted by a plurality of fourth conveyor rollers 313 so that the main conveyor belt 31 is in a Z-shape as a whole, and the auxiliary conveyor belt 32 is restricted by a plurality of fifth conveyor belts 61 so that the auxiliary conveyor belt 32 is in an L-shape as a whole; a plurality of second partitions 311 are provided on the main conveyor belt 31 along the conveying direction, and second baffles 312 are respectively installed on both sides of the main conveyor belt 31; a plurality of third partitions 321 are provided on the auxiliary conveyor belt 32 along the conveying direction, A third baffle 322 is installed on both sides of the auxiliary conveyor belt 32; the vertical section of the main conveyor belt 31 and the vertical section of the auxiliary conveyor belt 32 are arranged opposite to each other, so that the main conveyor belt 31, the second baffle 312, the auxiliary conveyor belt 32 and the third baffle 322 form a relatively closed space in the vertical section, thereby completing the vertical lifting of the concrete; the fourth conveyor roller 313 and the fifth conveyor roller 323 are respectively provided with a pair of support rollers, the diameters of the fourth conveyor roller 313 and the fifth conveyor roller 323 are the same, and the diameter of the support roller is larger than the diameter of the fourth conveyor roller 313.

[0041] The present invention uses a gantry base 1 as a foundation. During the process of transporting concrete from the bottom to the top of the gantry base 1, due to the limited width of the gantry base 1, conventional inclined conveyor belts are not specifically installed and adjusted, and a vertical lifting mechanism 3 is required for transportation. Conventional vertical lifting mechanisms 3 are mostly auger lifting structures. The auger lifting structure vertically lifts the transported material by squeezing it. This is not practical for the high-grade concrete used in the present invention. The lifting of high-grade concrete by hard squeezing shortens the life of the device, requires frequent maintenance, and affects efficiency. The present invention proposes a vertical lifting method in which the main conveyor belt 31 cooperates with the auxiliary conveyor belt 32 to complete the lifting. The vertical section of the main conveyor belt 31 is arranged opposite the vertical section of the auxiliary conveyor belt 32. Concrete is transported from the bottom horizontal section of the main conveyor belt 31. When transported to the vertical section of the main conveyor belt 31, the main conveyor belt 31, the second baffle 312, the auxiliary conveyor belt 32, and the third baffle 322 form a relatively closed space in the vertical section, enclosing the concrete for lifting, thereby preventing the concrete from flowing out from the sides or the front of the main conveyor belt 31 during vertical lifting. This transportation method is direct transportation and causes minimal damage to the main conveyor belt 31 and the auxiliary conveyor belt 32. A loading space is reserved in the bottom horizontal section of the main conveyor belt 31, and a relatively sealed space is formed in the vertical section. After loading is completed, a discharge space is reserved in the top horizontal section of the main conveyor belt 31, facilitating loading and unloading.

[0042] It should be noted that: in the preset of the main conveyor belt 31 and the auxiliary conveyor belt 32, ensure that the gap between the second baffles 312 is the same as the gap between the third baffles 322, and on the vertical section of the main conveyor belt 31, the second baffle 312 corresponds to the third baffle 322 to complete the transportation. However, in actual work, there are errors, and the second baffle 312 and the third baffle 322 cannot be guaranteed to be absolutely corresponding. However, since the concrete used in the dam has a high gradation and contains aggregate particles with larger diameters, it is not easy to flow out from the gap between the second baffle 312 and the third baffle 322, and a small amount of outflow will not affect the overall transportation. Therefore, the error in actual transportation has little effect on the vertical transportation of the main conveyor belt 31 and the auxiliary conveyor belt 32.

[0043] Furthermore, the tops of multiple second partitions 311 are connected by a chain 33; the tops of multiple third partitions 321 are connected by another chain 33. The second partitions 311 are configured in the same manner as the first partitions 626, both being fixedly mounted on their respective conveyor belt sections. The load-bearing function is also achieved by the traction of the conveyor belt sections and adjacent sections, resulting in a certain load-bearing pressure. Therefore, chains 33 are provided to connect the multiple second partitions 311 from their outer ends. The load-bearing second partitions 311 only exist during movement to the vertical section. After the chains 33 are provided, the adjacent second partitions 311 will jointly bear the concrete load, reducing the pressure on the second partitions 311 at the vertical section. The chains 33 of the third partitions 321 serve the same purpose.

[0044] Furthermore, the slewing mechanism 4 comprises a slewing platform and a drive motor. A through-hole is provided within the slewing platform for the vertical lifting mechanism 3 to pass through. A counterweight 7 is also mounted on the slewing platform. The drive motor rotates the slewing platform, adjusting its circumferential angle and, consequently, the horizontal angle of the fabric arm 6. The counterweight 7 is positioned behind the slewing platform to prevent the forward extension of the fabric arm 6, which would cause the center of gravity to shift forward and potentially collapse the gantry base 1.

[0045] Furthermore, the pitch adjustment structure 5 includes a tripod rear leg 50 and a tripod front leg 51, the tops of the tripod rear leg 50 and the tripod front leg 51 are fixedly connected, the bottom plates of the tripod rear leg 50 and the tripod front leg 51 are installed on the rotating mechanism 4 to form a triangle, and a fixed pulley group 52 is installed on the top of the tripod rear leg 50. It also includes an adjusting arm 55, which is located between the tripod front leg 51 and the unloading conveyor belt. The adjusting arm 55 is fixedly connected to the cloth arm 6, and the suspension wire rope 63 is connected to the adjusting arm 55. A movable pulley group 54 is installed on the top of the adjusting arm 55; it also includes an adjusting wire rope 53, which is connected to the winch 56 on the rotating platform after winding around the fixed pulley group 52 and the movable pulley group 54 for several circles. The tripod rear legs 50 and the tripod front legs 51 form a triangle structure, which cooperates with the fixed pulley group 52 to support the adjustment wire rope 53, and then uses the winch 56 to pull the adjustment wire rope 53 to complete the angle adjustment of the fabric arm 6.

[0046] When the winch 56 winds up the adjusting wire rope 53, it pulls the movable pulley group 54 closer to the fixed pulley group 52, and the adjusting arm 55 drives the fabric arm 6 to pitch up. When the winch 56 releases the adjusting wire rope 53, the movable pulley group 54 and the adjusting arm 55 move away from the fixed pulley group 52 under the gravity of the fabric arm 6, and the fabric arm 6 moves downward. During pitch adjustment, the angle between the front legs of the lifting tripod and the adjusting arm 55 is adjusted accordingly. The function of the adjusting arm 55 is to prevent the angle between the suspension wire rope 63 and the cloth arm 6 from being too small when the cloth arm 6 is at a large pitch angle, causing excessive tension on the suspension wire rope 63. The adjusting arm 55 and the cloth arm 6 always maintain a fixed angle, and the cloth arm 6 and the suspension wire rope 63 always maintain a fixed angle. When the cloth arm 6 is horizontal, the suspension wire rope 63 is subjected to the greatest force. When the cloth arm 6 is pitching, the force on the suspension wire rope 63 decreases with the cosine value of the pitch angle.

[0047] Furthermore, a transfer conveyor belt 8 is provided between the outlet of the vertical lifting mechanism 3 and the inlet of the unloading conveyor belt. The transfer conveyor belt 8 is provided to facilitate the transition of concrete.

[0048] The terms "connection" and "fixation" appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0049] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A portal concrete placing boom, characterized by: The machine comprises a gantry base (1), the gantry base (1) is connected to a vertical lifting mechanism (3) for lifting concrete from the bottom of the gantry base (1) to the top of the gantry base (1); A slewing mechanism (4) is installed on the top of the gantry base (1), a cloth arm (6) and a pitch adjustment structure (5) for adjusting the cloth arm (6) are installed on the slewing mechanism (4), a discharge conveyor belt is provided along the cloth arm (6), one end of the discharge conveyor belt is connected to the outlet of the vertical lifting mechanism (3), and the pitch adjustment structure (5) is connected to the discharge conveyor belt through a hanging wire rope (63) to adjust the slope of the discharge conveyor belt; A unloading trolley (62) is installed on the unloading conveyor belt. The unloading trolley (62) is towed by a first traction rope (628). The first traction device controls the first traction rope (628) to adjust the position of the unloading trolley (62) on the unloading conveyor belt.

2. The portal concrete placing boom according to claim 1, characterized in that: The unloading trolley (62) comprises two side plates (621), and the two side plates (621) are connected via a first conveying roller (622), a second conveying roller (623), and a third conveying roller (624); The first conveying roller (622) is located at the rear end of the side plate (621), the second conveying roller (623) is located at the front end of the side plate (621), and the third conveying roller (624) is located in the middle of the side plate (621), and the second conveying roller (623) is arranged at a higher height than the third conveying roller (624); The unloading conveyor belt first passes around the first conveyor roller (622), passes around the second conveyor roller (623), and then passes around the third conveyor roller (624), and then extends forward, so that the unloading conveyor belt has a height difference at the position of the unloading trolley (62); The conical discharge plate (625) is installed at the front end of the side plate (621) and is located below the second conveyor roller (623). The conical discharge plate (625) is used to guide the concrete dropped from the second conveyor roller (623) from both sides of the discharge conveyor belt, thereby dropping the concrete to the construction area to complete the distribution.

3. The portal concrete placing boom according to claim 2, characterized in that: It also includes a descending pipe (64), which is located below the unloading conveyor belt and directly below the conical unloading plate (625). Concrete falling from both sides of the conical unloading plate (625) falls into the descending pipe (64) and falls from the bottom of the descending pipe (64) to the construction area. The descending tube (64) is controlled by a second traction rope (641) and a second traction device.

4. The portal concrete placing boom according to claim 2, characterized in that: First baffles (627) are provided on both sides of the unloading conveyor belt, and a plurality of first partitions (626) are provided on the unloading conveyor belt along the conveying direction, with gaps between the first partitions (626) and the first baffles (627) on both sides; The first conveying roller (622) and the third conveying roller (624) are respectively provided with a pair of supporting rollers, the diameters of the first conveying roller (622), the second conveying roller (623) and the third conveying roller (624) are the same, and the diameter of the supporting roller is larger than the diameter of the first conveying roller (622); Along the first conveying roller (622), the space between a pair of support rollers is used for the first partition (626) to pass through, and the support rollers are used to support the unloading conveyor belt; The setting position and function of the support roller on the third conveying roller (624) are the same as those of the first conveying roller (622).

5. The portal concrete placing boom according to claim 1, characterized in that: The vertical lifting mechanism (3) comprises a main conveyor belt (31) and an auxiliary conveyor belt (32); The main conveyor belt (31) is restricted by a plurality of fourth conveyor rollers (313) so that the main conveyor belt (31) is in a Z-shape as a whole, and the auxiliary conveyor belt (32) is restricted by a plurality of fifth water conveyor belts so that the auxiliary conveyor belt (32) is in an L-shape as a whole. A plurality of second baffles (311) are provided on the main conveyor belt (31) along the conveying direction, and second baffles (312) are respectively installed on both sides of the main conveyor belt (31); a plurality of third baffles (321) are provided on the auxiliary conveyor belt (32) along the conveying direction, and third baffles (322) are respectively installed on both sides of the auxiliary conveyor belt (32); The vertical section of the main conveyor belt (31) and the vertical section of the auxiliary conveyor belt (32) are arranged relative to each other, so that the main conveyor belt (31), the second baffle (312), the auxiliary conveyor belt (32) and the third baffle (322) form a relatively closed space in the vertical section, thereby completing the vertical lifting of the concrete; The fourth conveying roller (313) and the fifth conveying roller (323) are respectively provided with a pair of supporting rollers. The diameters of the fourth conveying roller (313) and the fifth conveying roller (323) are the same, and the diameter of the supporting roller is larger than the diameter of the fourth conveying roller (313).

6. The portal concrete placing boom according to claim 5, characterized in that: The tops of the plurality of second partitions (311) are connected via a chain (33); and the tops of the plurality of third partitions (321) are connected via another chain (33).

7. The portal concrete placing boom according to claim 1, characterized in that: The rotary mechanism (4) comprises a rotary platform and a drive motor, and a through hole is provided inside the rotary platform, and the through hole is used for the vertical lifting mechanism (3) to pass through; A counterweight (7) is also installed on the rotary platform.

8. The portal concrete placing boom according to claim 1, characterized in that: The pitch adjustment structure (5) includes a tripod rear leg (50) and a tripod front leg (51), the tops of the tripod rear leg (50) and the tripod front leg (51) are fixedly connected, the bottom plates of the tripod rear leg (50) and the tripod front leg (51) are installed on the rotary mechanism (4) to form a triangle, and a fixed pulley group (52) is installed on the top of the tripod rear leg (50). It also includes an adjusting arm (55), the adjusting arm (55) is located between the front legs (51) of the tripod and the unloading conveyor belt, the adjusting arm (55) is fixedly connected to the cloth arm (6), the suspension wire rope (63) is connected to the adjusting arm (55), and a movable pulley group (54) is installed on the top of the adjusting arm (55); The utility model also includes an adjusting wire rope (53), which is connected to a winch (56) on a rotary platform after being wound around a fixed pulley group (52) and a movable pulley group (54) for several turns.

9. The portal concrete placing boom according to claim 1, characterized in that: A transfer conveyor belt (8) is provided between the outlet of the vertical lifting mechanism (3) and the inlet of the unloading conveyor belt.

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