Belt conveyor with adjustable conveying length

Abstract

The utility model discloses a kind of belt conveyors of adjustable conveying length, comprising: rack fixed section, including fixed section support frame body, fixed section running mechanism and fixed section belt conveying mechanism, running channel is provided in the inside of fixed section support frame body along the conveying direction of fixed section belt conveying mechanism, and two rows of adjusting units are symmetrically fixed in inner side face;Rack movable section, including movable section longitudinal beam, movable section support column, movable section running mechanism and movable section belt conveying mechanism, movable section longitudinal beam is set on two rows of adjusting units, and matching load movable section belt conveying mechanism.Adopting the utility model can transport concrete to different far and near distance pouring points, to help meet the segmented, horizontal layered ground fast, continuous pouring adjustment requirements of prefabricated beam.

Description

Technical Field

[0001] This utility model relates to the field of construction equipment technology, and in particular to an adjustable conveyor belt conveyor. Background Technology

[0002] Concrete is a commonly used material in construction. On construction sites, concrete mixer trucks are usually used to transport concrete to different pouring points. However, when there are many pouring points and they are distributed over a wide area, the concrete mixer trucks need to travel frequently within the production area, which makes management difficult. In addition, there may be other problems for some special concrete products.

[0003] Taking the concrete pouring of precast beams as an example, precast beam concrete pouring is a labor-intensive construction process, including material supply from the mixing plant, concrete delivery to the pouring area, measurement and control of concrete and formwork temperatures, concrete placement, concrete vibration, and surface leveling and finishing of the beam. Furthermore, the continuity and integrity of precast beam concrete pouring are strictly required. Once pouring begins, it must be continuous and formed in one go. If concrete mixer trucks are used for material transportation, timely dispatch of these trucks is necessary to ensure timely delivery; otherwise, the continuity of pouring will be affected. However, this method requires ensuring that... Reducing the number of drivers on site is labor-intensive and does not solve the problem of management difficulties. Currently, some construction sites also use belt conveyors to transport concrete, which can reduce the number of drivers and make management more standardized. However, the working area for precast beam pouring is relatively large, requiring segmented and horizontal layered pouring. Traditional belt conveyors have non-adjustable conveying lengths. When the distance between pouring points increases, the concrete hopper needs to be transported to the unloading point of the belt conveyor to receive the material, which affects the continuity of pouring. Therefore, it is very necessary to study a belt conveyor with adjustable conveying length. Utility Model Content

[0004] This utility model discloses an adjustable conveyor belt, which can transport concrete to pouring points at different distances, thereby helping to meet the requirements for rapid and continuous pouring of precast beams in segments and horizontal layers.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: An adjustable conveyor belt, comprising: The frame is fixed, which includes a fixed section support frame, a fixed section traveling mechanism and a fixed section belt conveyor mechanism. The fixed section support frame has a traveling channel inside along the conveying direction of the fixed section belt conveyor mechanism. Two rows of adjustment units are symmetrically fixed at intervals on the inner side facing the traveling channel. The fixed section traveling mechanism is connected to the bottom and the fixed section belt conveyor mechanism is provided at the top. The movable section of the frame, which is slidably disposed in the travel channel, includes a movable section longitudinal beam, a movable section support column, a movable section traveling mechanism, and a movable section belt conveyor mechanism. Two movable section longitudinal beams are symmetrically arranged and matched on the two rows of adjustment units along the conveying direction of the fixed section belt conveyor mechanism, and can match and support the movable section belt conveyor mechanism. The movable section support column is connected to the lower front end of the movable section. The movable section belt conveyor mechanism can slide back and forth relative to the adjustment units. The movable section traveling mechanism is connected to the bottom of the movable section support column. The movable section belt conveyor mechanism is disposed below the fixed section belt conveyor mechanism.

[0006] Preferably, the fixed section support frame includes a fixed section top longitudinal beam, a fixed section limiting longitudinal beam, a fixed section bottom longitudinal beam, and a fixed section support column. Two fixed section top longitudinal beams, two fixed section limiting longitudinal beams, and two fixed section bottom longitudinal beams are symmetrically arranged. The fixed section top longitudinal beam, the fixed section limiting longitudinal beam, and the fixed section bottom longitudinal beam on the same side are connected by fixed section support columns that are spaced apart. A limiting roller is rolled on the inner side of the fixed section limiting longitudinal beam. The limiting roller is located between the fixed section belt conveyor mechanism and the movable section belt conveyor mechanism and can match and limit the height position of the movable section belt conveyor mechanism.

[0007] More preferably, the adjustment unit includes a plurality of rollers and roller shafts matched with the rollers. One end of the roller shaft is fixedly connected to the inner side of the fixed section support frame, and the other end is rotatably connected to the rollers. The plurality of rollers are arranged in a horizontal straight line.

[0008] More preferably, the roller is provided with a groove on its periphery, which can be matched and inserted into the movable longitudinal beam.

[0009] More preferably, a telescopic drive mechanism is provided at the front end of the fixed section of the frame. The telescopic drive mechanism is located behind the support column of the movable section and can drive at least one set of rollers to rotate, thereby driving the longitudinal beam of the movable section to slide.

[0010] More preferably, the telescopic drive mechanism includes a telescopic drive mechanism platform, a telescopic drive motor, a first telescopic drive reduction gear, a second telescopic drive reduction gear, a roller shaft, and a shaft support column. The telescopic drive mechanism platform is fixed to the front end of the frame fixing section, and the telescopic drive motor and the shaft support column are fixed on it. The shaft support column is arranged on both sides of the telescopic drive motor. The motor shaft of the telescopic drive motor is connected to the first telescopic drive reduction gear. The second telescopic drive reduction gear is sleeved on the outer circumference of the roller shaft, and both ends pass through the shaft support column and are connected to one of the rollers. The second telescopic drive reduction gear meshes with the first telescopic drive reduction gear. The remaining rollers are rotatably connected to one end of the roller support shaft, and the other end of the roller support shaft is connected to the fixed section support frame.

[0011] Preferably, the movable section belt conveyor mechanism includes a movable section drive unit, which is disposed at the rear end of the movable section longitudinal beam; The fixed section belt conveyor mechanism includes a fixed section drive unit, which is located in the middle section of the top of the fixed section support frame.

[0012] Preferably, a limit sensor is provided at a position of the movable section longitudinal beam near the movable section support column, and the limit sensor is located behind the movable section support column.

[0013] Preferably, the fixed section belt conveyor mechanism includes a fixed section belt driven shaft, a fixed section belt, and a fixed section belt drive shaft. The fixed section belt driven shaft is rotatably connected to the front end of the top longitudinal beam of the fixed section. The fixed section belt drive shaft is rotatably connected to the middle section of the top longitudinal beam of the fixed section. The fixed section belt is wrapped between the fixed section belt drive shaft and the fixed section belt drive shaft. Fixed section belt baffles are provided on both sides of the fixed section belt.

[0014] Preferably, the movable section belt conveyor mechanism further includes a movable section belt driven shaft, a movable section belt, and a movable section belt drive shaft. The movable section belt driven shaft is rotatably connected to the front end of the movable section longitudinal beam, and the movable section belt drive shaft is rotatably connected to the rear end of the movable section longitudinal beam. The movable section belt is enclosed between the movable section belt driven shaft and the movable section belt drive shaft, and movable section belt baffles are provided on both sides of the movable section belt.

[0015] The adjustable conveyor belt conveyor described above has the following advantages: (1) The belt conveyor of this utility model can be used for the transportation of concrete at construction sites in different occasions. In addition, it can also transport other materials as needed, and is especially suitable for the transportation of materials that require adjustment of the conveying distance during transportation.

[0016] (2) Applying the belt conveyor of this utility model to the transportation of concrete at the construction site can avoid the management chaos caused by the repeated travel of concrete trucks and can also reduce the use of drivers.

[0017] (3) Applying the belt conveyor of this utility model to the casting of precast beams can continuously transport concrete to the concrete placing machine, which can meet the requirements of rapid and continuous casting adjustment of precast beams in segments and horizontal layers, thereby realizing the continuous casting of precast beams from one end to the other, ensuring the continuity of the operation, and helping to improve the casting quality of precast beams.

[0018] (4) The belt conveyor of this utility model is used in conjunction with the concrete placing machine. Since the conveying length is adjustable, the pouring arm of the concrete placing machine can be shortened, thereby improving the responsiveness of the positioning and movement of the pouring arm, thus improving the positioning accuracy of the pouring point and improving the efficiency of the pouring operation.

[0019] (5) This utility model improves the level of automated operation of precast beam concrete pouring machinery, reduces the labor intensity of operators, and reduces reliance on manual labor. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the frame fixing section.

[0021] Figure 2 yes Figure 1 A top-view structural diagram.

[0022] Figure 3 yes Figure 1 A schematic diagram of the AA section structure.

[0023] Figure 4 yes Figure 1 A schematic diagram of the BB cross-section structure.

[0024] Figure 5 This is a schematic diagram of the main structure of the movable section of the frame.

[0025] Figure 6 yes Figure 5 A top-view structural diagram.

[0026] Figure 7 yes Figure 5 A schematic diagram of the CC section structure.

[0027] Figure 8 yes Figure 5 A schematic diagram of the DD cross-section structure.

[0028] Figure 9 This is a schematic diagram of the main structure of a belt conveyor.

[0029] Figure 10 This is a structural schematic diagram of one implementation state of the present invention when the belt conveyor and the concrete placing machine are combined for anti-symmetrical casting.

[0030] Figure 11 This is a schematic diagram of another implementation state of the present invention when the belt conveyor and the concrete placing machine are combined for anti-symmetrical casting.

[0031] Figure 12 This is a structural schematic diagram of one implementation state of the present invention when the belt conveyor and the concrete placing machine are combined for symmetrical pouring.

[0032] Figure 13 This is a schematic diagram of another implementation state of the present invention when the belt conveyor and the concrete placing machine are combined for symmetrical pouring.

[0033] In the diagram, the components are: fixed section 100, fixed section belt conveyor mechanism 110, fixed section belt driven shaft 111, fixed section belt 112, fixed section roller 113, fixed section belt drive shaft 114, fixed section belt drive motor 115, fixed section drive reduction unit 116, fixed section support frame 120, fixed section bottom longitudinal beam 121, fixed section support column 122, fixed section top longitudinal beam 123, fixed section limiting longitudinal beam 124, fixed section crossbeam 125, fixed section diagonal brace 126, fixed section traveling mechanism 130, limiting roller 140, roller 150, telescopic drive mechanism 160, telescopic drive motor 161, and telescopic drive first reduction gear. 162, Telescopic drive mechanism platform; 163, Roller shaft; 164, Shaft support column; 165, Telescopic drive second reduction gear; 166, Frame movable section; 200, Movable section belt conveyor mechanism; 210, Movable section belt driven shaft; 211, Movable section belt; 212, Movable section roller; 213, Movable section belt drive shaft; 214, Movable section belt drive motor; 215, Movable section motor platform; 216, Movable section transmission chain; 217, Movable section longitudinal beam; 220, Movable section support column; 230, Movable section traveling mechanism; 240, Movable section longitudinal beam connecting frame; 250, Limit sensor; 260, Mobile concrete placing machine; 300, Precast beam; 400, Hopper; 500. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. 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 limiting this invention.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] A belt conveyor, such as Figure 9 As shown, it includes a fixed rack section 100 and a movable rack section 200, wherein: the fixed rack section 100, combined with... Figure 1-4 As shown, it includes a fixed section support frame 120, a fixed section traveling mechanism 130, and a fixed section belt conveyor mechanism 110. The fixed section support frame 120 has a traveling channel inside along the conveying direction of the fixed section belt conveyor mechanism 110. Two rows of adjusting units are symmetrically fixed at intervals on the inner side facing the traveling channel. Figure 2 and Figure 4 As shown, the fixed section support frame 120 is generally a cubic frame. The adjustment unit is symmetrical about the centerline in the width direction of the fixed section support frame 120. The bottom of the fixed section support frame 120 is connected to the fixed section traveling mechanism 130, and the top is equipped with a fixed section belt conveyor mechanism 110. The fixed section traveling mechanism 130 generally uses wheels to allow the frame fixed section 100 to move. It can be matched with a fixed section traveling mechanism drive unit, such as a motor, to drive the frame fixed section 100 to move. The fixed section belt conveyor mechanism 110 is used to transport concrete. Of course, it can also transport other materials as needed. The fixed section belt conveyor mechanism 110 can be set on the top section of the fixed section support frame 120, or the conveying path can be shortened and it can be set only on the front section of the fixed section support frame 120, i.e. Figure 1 The structure shown. The frame movable section 200, combined with... Figure 5-8As shown, it is slidably installed in the travel channel, including a movable section longitudinal beam 220, a movable section support column 230, a movable section traveling mechanism 240, and a movable section belt conveyor mechanism 210. Two movable section longitudinal beams 220 are symmetrically arranged and matched with the two rows of adjustment units along the conveying direction of the fixed section belt conveyor mechanism 110, and can match and support the movable section belt conveyor mechanism 210. The movable section support column 230 is connected to the front end. The movable section belt conveyor mechanism 210 can slide back and forth relative to the adjustment units. The movable section traveling mechanism 240 is connected to the bottom of the movable section support column 230. The movable section belt conveyor mechanism 210 is located below the fixed section belt conveyor mechanism 110. The movable section 200 of the frame mainly relies on the support of the movable section support column 230 and the adjustment units to move in the travel channel. Concrete or other materials conveyed to the front end of the fixed section support frame 120 by the fixed section belt conveyor mechanism 110 fall to the movable section belt conveyor mechanism 210, and are then transported forward by the movable section belt conveyor mechanism 210. Since the movable section belt conveyor mechanism 210 can slide back and forth relative to the adjustment unit, the length of the movable section 200 extending out of the fixed section 100 of the frame can be adjusted, thus adjusting the length of the concrete or other material transport path and achieving the adjustment of the conveying length.

[0038] In addition, to facilitate the introduction of concrete or other liquid or small granular materials into the fixed section belt conveyor mechanism 110, a hopper can be installed above the rear end of the fixed section belt conveyor mechanism 110. The hopper can be fixed above the fixed section support frame 120 by a fixing frame, and the bottom two sides of the fixing frame are connected to the top two sides of the fixed section support frame 120.

[0039] Preferably, to better ensure the smooth operation of the moving section belt conveyor mechanism 210, the fixed section support frame 120 includes a fixed section top longitudinal beam 123, a fixed section limiting longitudinal beam 124, a fixed section bottom longitudinal beam 121, and a fixed section support column 122. Two fixed section top longitudinal beams 123, 124, and 121 are symmetrically arranged from top to bottom. The fixed section top longitudinal beam 123, 124, and 121 on the same side are connected by spaced fixed section support columns 122. To ensure the stability of the fixed section support frame 120, fixed section crossbeams 125 can be further connected between the bottom of the fixed section support columns 122. Triangularly arranged fixed section diagonal braces 126 are provided between the fixed section limiting longitudinal beam 124 and the fixed section bottom longitudinal beam 121. Figure 4As shown, a limiting roller 140 is rolled on the inner side of the fixed section limiting longitudinal beam 124. The limiting roller 140 is also symmetrically arranged relative to the center line of the width direction of the fixed section support frame 120. The limiting roller 140 is located between the fixed section belt conveyor mechanism 110 and the movable section belt conveyor mechanism 210, and can match and limit the height position of the movable section belt conveyor mechanism 210 to prevent it from floating excessively and deviating.

[0040] Regarding the adjustment unit, an adjustment roller or a sliding plate can be selected, but this embodiment provides a more preferred structure, combined with... Figure 4 As shown, the adjustment unit includes multiple rollers and roller shafts that match the rollers. One end of the roller shaft is fixedly connected to the inner side of the fixed section support frame, and the other end is rotatably connected to the roller. The multiple rollers are arranged in a horizontal straight line. In this embodiment, the roller shaft is fixedly connected to the inner side of the fixed section support column 122. The rollers are low in cost and slide relatively smoothly. More preferably, the roller 150 is provided with a groove on its circumference, which can match the insertion of the movable section longitudinal beam 220. The groove can be an inverted trapezoid with a smaller bottom and a larger top to ensure that the movable section belt conveyor mechanism 210 travels along the preset path of the roller 150. Combined with the setting of the limiting roller 140, it can better prevent the movable section belt conveyor mechanism 210 from deviating from the preset path.

[0041] Preferably, to facilitate the adjustment of the telescopic length of the movable section 200 of the frame, a telescopic drive mechanism 160 is provided at the front end of the fixed section 100 of the frame, which can drive at least one set of rollers 150 to rotate. The rotation of the rollers 150 drives the sliding of the longitudinal beam 220 of the movable section. To ensure the driving effect, a flexible friction material, such as rubber, can be provided in the groove of the rollers 150 or on the bottom surface of the longitudinal beam 220 of the movable section. This can better and more smoothly drive the movable section 200 of the frame to slide. It is worth noting that the telescopic drive mechanism 160 is located behind the movable section support column 230 to avoid the telescopic drive mechanism 160 affecting the forward movement of the movable section support column 230.

[0042] Preferably, this embodiment provides a specific telescopic drive mechanism 160, combined with Figure 3As shown, the telescopic drive mechanism 160 includes a telescopic drive mechanism platform 163, a telescopic drive motor 161, a first telescopic drive reduction gear 162, a second telescopic drive reduction gear 166, a roller shaft 164, and a shaft support column 165. The telescopic drive mechanism platform 163 is fixed to the front end of the frame fixed section 100, and its two ends can be connected to the inner side of the fixed section support column 122. It is located below the movable section belt conveyor mechanism 210. The telescopic drive mechanism platform 163 is fixed with the telescopic drive motor 161 and the shaft support column 165. The shaft support column 165 is arranged on both sides of the telescopic drive motor 161. The motor shaft of the telescopic drive motor 161 is connected to a telescopic drive first reduction gear 162. A telescopic drive second reduction gear 166 is sleeved on the outer circumference of the roller shaft 164, with both ends passing through the shaft support column 165 and connected to one of the rollers 150. The telescopic drive second reduction gear 166 meshes with the telescopic drive first reduction gear 162. The shaft support column 165 has a through hole and a bearing that engages with the roller shaft 164 to support the roller shaft 164. The diameter of the telescopic drive first reduction gear 162 is smaller than that of the telescopic drive second reduction gear 166 to achieve deceleration. When the telescopic drive motor 161 rotates forward or backward, it drives the roller shaft 164 through the telescopic drive first reduction gear 162 and telescopic drive second reduction gear 166. The roller shaft 164 drives the rollers 150 to rotate, which in turn drives the movable section longitudinal beam 220 to move forward or backward. It should be noted here that this set of rollers 150 can be selected according to the situation; it can be the first set, the second set, the third set, etc., counting from the front end of the frame fixing section 100. Combined with... Figure 4 As shown, the remaining rollers 150 are rotatably connected to one end of the roller support shaft, and the other end of the roller support shaft is connected to the fixed section support frame 120. The figure shows the connection to the inner side of the fixed section support column 122.

[0043] Preferably, the movable section belt conveyor mechanism 210 includes a movable section drive unit, which is disposed at the rear end of the movable section longitudinal beam 220; combined with Figure 5 and Figure 7As shown, a downwardly extending movable section motor platform 216 is connected between the inner sides of the movable section longitudinal beam 220. A movable section belt drive motor 215 is installed on the movable section motor platform 216. The motor shaft of the movable section belt drive motor 215 is fitted with a movable section drive gear. The movable section belt drive shaft 214 of the movable section belt conveyor mechanism 210 is fitted with a movable section driven gear. A movable section transmission chain 217 is installed between the movable section drive gear and the movable section driven gear, thus driving the movable section belt conveyor mechanism 210 to work. More specifically, the movable belt conveyor mechanism 210 also includes a movable belt driven shaft 211, a movable belt 212, a movable roller 213, and a movable belt drive shaft 214. The movable belt driven shaft 211 is rotatably connected to the front end of the movable longitudinal beam 220, and the movable belt drive shaft 214 is rotatably connected to the rear end of the movable longitudinal beam 220. The movable belt 212 is enclosed between the movable belt driven shaft 211 and the movable belt drive shaft 214. Movable belt baffles can be installed on both sides of the movable belt 212 to prevent concrete or other materials from leaking out. In addition, movable rollers 213 are also spaced between the movable belt drive shaft 214 and the movable longitudinal beam 220. The movable rollers 213 are rotatably connected to the movable longitudinal beam 220 to support the upper surface of the movable belt 212 and maintain a good level. To ensure the stability of the movable section longitudinal beam 220, a U-shaped movable section longitudinal beam connecting frame 250 is connected between the front ends of the movable section longitudinal beam 220, and the lower part of the movable section longitudinal beam connecting frame 250 is connected to the movable section support column 230.

[0044] Preferably, the fixed section belt conveyor mechanism 110 includes a fixed section drive unit, which is located on the outer side of the middle section of the top of the fixed section support frame 120. This avoids affecting the movement of the movable section 200 of the frame. Figure 4As shown, a fixed section support platform is installed on the outside of the fixed section support column 122. A fixed section belt drive motor 115 is fixed on the fixed section support platform. The fixed section belt drive motor 115 drives the fixed section belt drive shaft 114 of the fixed section belt conveyor mechanism 110 through the fixed section drive reduction unit 116, thus driving the fixed section belt conveyor mechanism 110 to work. More specifically, the fixed section belt conveyor mechanism 110 also includes a fixed section belt driven shaft 111, a fixed section belt 112, a fixed section roller 113, and a fixed section belt drive shaft 114. The fixed section belt driven shaft 111 is rotatably connected to the front end of the fixed section top longitudinal beam 123, and the fixed section belt drive shaft 114 is rotatably connected to the middle section of the fixed section top longitudinal beam 123. A fixed section belt 112 is wrapped between the fixed section belt drive shaft 114 and the fixed section belt drive shaft 112. Fixed section belt baffles can be provided on both sides of the fixed section belt 112 to prevent concrete or other materials from leaking out. In addition, a fixed section roller 113 is also provided between the fixed section belt drive shaft 114 and the fixed section top longitudinal beam 123. The fixed section roller 113 is rotatably connected to the fixed section top longitudinal beam 123 to support the upper surface of the fixed section belt 112 to maintain a good horizontal state.

[0045] Preferably, a limit sensor 260 is provided at a position of the movable section longitudinal beam 220 near the movable section support column 230. The limit sensor 260 is located behind and close to the movable section support column 230. After the limit sensor 260 senses the telescopic drive mechanism 160, it can issue a reminder or feedback to the control unit to stop the movable section 200 of the frame from moving towards the telescopic drive mechanism 160, so as to avoid damaging the telescopic drive mechanism 160.

[0046] This embodiment provides a specific application scenario of the belt conveyor described above, using it in the casting of a precast beam 400. A placing boom 300 is placed at the front end of the belt conveyor. The placing boom 300 includes a collection trough for collecting the concrete conveyed by the belt conveyor, which is then pumped into the mold of the precast beam. During casting, a set of belt conveyors and placing booms 300 can be placed on both sides of the precast beam 400, respectively, using anti-symmetrical or symmetrical casting methods. Figure 10 and Figure 11As shown in the diagram, which is a partial schematic of anti-symmetrical pouring, concrete is fed into hopper 500 and flows into fixed section belt conveyor mechanism 110. The concrete delivered to the front end of fixed section belt conveyor mechanism 110 enters movable section belt conveyor mechanism 210, and is then conveyed to the front end of movable section belt conveyor mechanism 210 and introduced into collection trough 304 before being poured into precast beam 400. By adjusting the extension length of movable section belt conveyor mechanism 210 relative to fixed section belt conveyor mechanism 110, fixed section belt conveyor mechanism 110 can be moved to different areas of precast beam 400. Since the belt conveyor can achieve concrete pouring at pouring points of different lengths, it can meet the requirements for rapid and continuous pouring adjustment of precast beam 400 in segments and horizontal layers, thereby achieving continuous pouring of precast beam 400 from one end to the other, ensuring the continuity of operation, and helping to improve the pouring quality of precast beam. For larger precast beams, the precast beam mold is divided into eight casting zones, four on each side. Belt conveyors and concrete placing booms (300 units) are diagonally positioned at both ends of the precast beam. Two sets of belt conveyors and placing booms (300 units) operate simultaneously. One set travels from the front to the rear on one side, and the other from the rear to the front on the other side. The placing booms (300 units) pour material in different zones, and the conveyor length is adjusted by changing the conveyor length. For example, if there are four casting zones on one side of the precast beam (400), changing the conveyor length four times is sufficient to meet the material feeding requirements for one layer of casting. Within the same casting zone, construction proceeds from one end to the other, which is achieved by adjusting the cantilever length of the placing boom (300 units). This horizontal, layered casting method allows for casting of one precast beam section in no more than 6 hours, achieving the requirement of one-time molding. Alternatively, a symmetrical casting method can be used, combined with... Figure 12 and Figure 13 As shown, two sets of belt conveyors and the concrete placing boom 300 move symmetrically from the front to the rear on both sides, greatly improving the automation level of the precast beam 400 casting. Furthermore, by using belt conveyors with adjustable conveying lengths, the casting arm of the accompanying concrete placing boom can be shortened, thus improving the responsiveness of the casting arm's positioning and movement, and making the casting point positioning more precise.

[0047] The belt conveyor of this embodiment has the following advantages: (1) It is equipped with a fixed section traveling mechanism 130 and a movable section traveling mechanism 240, which are flexible and can travel as needed, thus improving the flexibility and applicability of the belt conveyor to different working conditions; (2) It can be equipped with a hopper 500, which can receive materials at a fixed point, simplifying the layout of the feeding device and avoiding the management difficulties caused by long-distance transportation of concrete mixer trucks; (3) According to the requirements of the material placement position, it can drive the movable section 200 of the frame to extend and retract, thus solving the problem of concrete transportation at different distances; (4) As long as the supply at the feeding end is stable, the mobile telescopic belt conveyor can continuously feed materials, ensuring the continuity of operation.

Claims

1. A belt conveyor with adjustable conveying length, characterized in that include: The frame is fixed, which includes a fixed section support frame, a fixed section traveling mechanism and a fixed section belt conveyor mechanism. The fixed section support frame has a traveling channel inside along the conveying direction of the fixed section belt conveyor mechanism. Two rows of adjustment units are symmetrically fixed at intervals on the inner side facing the traveling channel. The fixed section traveling mechanism is connected to the bottom and the fixed section belt conveyor mechanism is provided at the top. The movable section of the frame, which is slidably disposed in the travel channel, includes a movable section longitudinal beam, a movable section support column, a movable section traveling mechanism, and a movable section belt conveyor mechanism. Two movable section longitudinal beams are symmetrically arranged and matched on the two rows of adjustment units along the conveying direction of the fixed section belt conveyor mechanism, and can match and support the movable section belt conveyor mechanism. The movable section support column is connected to the lower front end of the movable section. The movable section belt conveyor mechanism can slide back and forth relative to the adjustment units. The movable section traveling mechanism is connected to the bottom of the movable section support column. The movable section belt conveyor mechanism is disposed below the fixed section belt conveyor mechanism.

2. The belt conveyor with adjustable conveying length according to claim 1, characterized in that: The fixed section support frame includes a fixed section top longitudinal beam, a fixed section limiting longitudinal beam, a fixed section bottom longitudinal beam, and a fixed section support column. Two fixed section top longitudinal beams, two fixed section limiting longitudinal beams, and two fixed section bottom longitudinal beams are symmetrically arranged. The fixed section top longitudinal beam, the fixed section limiting longitudinal beam, and the fixed section bottom longitudinal beam on the same side are connected by the fixed section support columns arranged at intervals. A limiting roller is rolled inside the fixed section limiting longitudinal beam. The limiting roller is located between the fixed section belt conveyor mechanism and the movable section belt conveyor mechanism and can match and limit the height position of the movable section belt conveyor mechanism.

3. The belt conveyor with adjustable conveying length according to claim 2, characterized in that: The adjustment unit includes multiple rollers and roller shafts that are matched with the rollers. One end of the roller shaft is fixedly connected to the inner side of the fixed section support frame, and the other end is rotatably connected to the rollers. The multiple rollers are arranged in a horizontal straight line.

4. The belt conveyor with adjustable conveying length according to claim 3, characterized in that: The roller has a groove on its circumference, which can be fitted into the movable longitudinal beam.

5. The belt conveyor with adjustable conveying length according to claim 4, characterized in that: The front end of the fixed section of the frame is provided with a telescopic drive mechanism. The telescopic drive mechanism is located behind the support column of the movable section and can drive at least one set of rollers to rotate, thereby driving the longitudinal beam of the movable section to slide.

6. The belt conveyor with adjustable conveying length according to claim 5, characterized in that: The telescopic drive mechanism includes a telescopic drive mechanism platform, a telescopic drive motor, a first telescopic drive reduction gear, a second telescopic drive reduction gear, a roller shaft, and a shaft support column. The telescopic drive mechanism platform is fixed to the front end of the frame fixing section, and the telescopic drive motor and the shaft support column are fixed on it. The shaft support column is arranged on both sides of the telescopic drive motor. The motor shaft of the telescopic drive motor is connected to the first telescopic drive reduction gear. The second telescopic drive reduction gear is sleeved on the outer circumference of the roller shaft, and both ends pass through the shaft support column and are connected to one of the rollers. The second telescopic drive reduction gear meshes with the first telescopic drive reduction gear. The remaining rollers are rotatably connected to one end of the roller support shaft, and the other end of the roller support shaft is connected to the fixed section support frame.

7. The belt conveyor with adjustable conveying length according to claim 1, characterized in that: The movable section belt conveyor mechanism includes a movable section drive unit, which is located at the rear end of the movable section longitudinal beam; The fixed section belt conveyor mechanism includes a fixed section drive unit, which is located in the middle section of the top of the fixed section support frame.

8. The belt conveyor with adjustable conveying length according to claim 1, characterized in that: A limit sensor is installed at a position on the longitudinal beam of the movable section near the support column of the movable section, and the limit sensor is located behind the support column of the movable section.

9. The belt conveyor with adjustable conveying length according to any one of claims 2-8, characterized in that: The fixed section belt conveyor mechanism includes a fixed section belt driven shaft, a fixed section belt, and a fixed section belt drive shaft. The fixed section belt driven shaft is rotatably connected to the front end of the top longitudinal beam of the fixed section. The fixed section belt drive shaft is rotatably connected to the middle section of the top longitudinal beam of the fixed section. The fixed section belt is wrapped between the fixed section belt drive shaft and the fixed section belt drive shaft. Fixed section belt baffles are provided on both sides of the fixed section belt.

10. The belt conveyor with adjustable conveying length according to any one of claims 1-8, characterized in that: The movable section belt conveyor mechanism further includes a movable section belt driven shaft, a movable section belt, and a movable section belt drive shaft. The movable section belt driven shaft is rotatably connected to the front end of the movable section longitudinal beam, and the movable section belt drive shaft is rotatably connected to the rear end of the movable section longitudinal beam. The movable section belt is enclosed between the movable section belt driven shaft and the movable section belt drive shaft, and movable section belt baffles are provided on both sides of the movable section belt.

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