Discharge belt conveyor for long, large and deep foundation pit vertical elevator

Abstract

The utility model discloses a discharge belt conveyor for long and big deep foundation pit vertical elevator, including pitch and heave mechanism and vertical bending Z -shaped belt conveyor, vertical bending Z -shaped belt conveyor installs on pitch and heave mechanism, and pitch and heave mechanism is strip frame structure, and one end articulates on the strip panel of rotary disc, and the both sides articulation of other end have two pitch and heave hydraulic cylinders, and the both sides articulation of two pitch and heave hydraulic cylinders other end articulate to the articulation seat of strip panel, and after pitch and heave hydraulic cylinder retraction, can put pitch and heave mechanism to the strip panel. Through pitch and heave hydraulic cylinder control pitch and heave mechanism pitch and heave adjust the angle of vertical bending Z -shaped belt conveyor, better butt -joint to the discharge end of material taking device and the feeding end of assembly time conveying corridor, solve the current in the tunnel long and big deep foundation pit excavation process artificial loading and unloading adjustment mobile telescopic conveyor and material taking device and assembly type conveying corridor butt -joint engineering quantity, the problem of poor effect, improve the soil conveying efficiency and effect.

Description

Technical Field

[0001] This utility model belongs to the field of soil discharge and transportation technology for deep foundation pit excavation, specifically relating to a discharge belt conveyor for a vertical lifting machine for long and deep foundation pits. Background Technology

[0002] In open excavation of soft soil, the excavation volume is large. Usually, after excavation by excavators, a large number of dump trucks are used to transport the excavated soil away. This method is inconvenient and inefficient, and the dump trucks have difficulty moving in the foundation pit of soft soil. To address this problem, Chinese patent application No. 2024106850234 designed an integrated excavation, loading, transportation and unloading machine. The structure of this device mainly includes a tracked mobile bucket wheel material reclaiming device, a mobile telescopic conveyor, a prefabricated conveying corridor and a mobile loader. The tracked mobile bucket wheel material reclaiming device feeds the excavated soil into the conveyor belt on the tracked mobile bucket wheel material reclaiming device. The discharge end of the conveyor belt is connected to the feed end of the mobile telescopic conveyor. The discharge end of the mobile telescopic conveyor is connected to the feed end of the prefabricated conveying corridor. The discharge end of the prefabricated conveying corridor is connected to the discharge hopper of the mobile loader.

[0003] However, during the excavation of long and deep foundation pits in tunnels, there are often slope changes between the material handling device and the mobile telescopic conveyor, and between the mobile telescopic conveyor and the prefabricated conveying corridor. During use, it is necessary to constantly reinstall and adjust the state of the mobile telescopic conveyor according to the connection angle between each piece of equipment. This process is very complicated, which not only increases the workload, but also sometimes the connection between the mobile telescopic conveyor and the material handling device and the prefabricated conveying corridor is not good enough, affecting the efficiency and effect of soil transportation. Utility Model Content

[0004] The purpose of this invention is to provide a discharge belt conveyor for a vertical lifting machine for long and deep foundation pits, which solves the problem that the current manual loading, unloading, adjustment of mobile telescopic conveyors and material handling devices and the connection with prefabricated conveyor corridors in the process of excavating long and deep foundation pits in tunnels is labor-intensive and ineffective, resulting in reduced soil transportation efficiency and quality.

[0005] The technical solution adopted in this utility model is a discharge belt conveyor for a vertical lifting machine for long and deep foundation pits, including a pitching and lifting mechanism and a vertical bending Z-shaped belt conveyor. The vertical bending Z-shaped belt conveyor is installed on the pitching and lifting mechanism, which is a strip frame structure. One end is hinged to the strip panel of the rotating disk, which is installed on the traveling mechanism. Two pitching hydraulic cylinders are hinged to both sides of the other end of the pitching and lifting mechanism. The other ends of the two pitching hydraulic cylinders are hinged to the hinge seats of the strip panel. After the pitching hydraulic cylinders are retracted, the pitching and lifting mechanism can be placed on the strip panel.

[0006] Furthermore, the aforementioned pitch lifting mechanism includes a pitch frame, a pitch hydraulic cylinder, and a lifting telescopic hydraulic cylinder. The back of the pitch frame is hinged to one side of the output end of the rotating disk. The upper end of the pitch hydraulic cylinder is hinged to the pitch frame near the upper end, and the lower end is hinged to the other side away from the hinge point between the rotating disk and the pitch frame. The pitch frame has a vertical strip-shaped groove structure. The vertically bent Z-shaped belt conveyor is vertically slidably connected in the groove of the pitch frame. Two lifting telescopic hydraulic cylinders are used, symmetrically arranged on both sides of the vertically bent Z-shaped belt conveyor. The cylinder seat of the lifting telescopic hydraulic cylinder is fixedly connected to the pitch frame, and the cylinder rod end of the lifting telescopic hydraulic cylinder is hinged to the top of the vertical end of the vertically bent Z-shaped belt conveyor.

[0007] Furthermore, the aforementioned vertical bending Z-shaped belt conveyor includes a first belt conveyor frame, a second belt conveyor frame, a third belt conveyor frame, and a lifting and carrying belt. The first belt conveyor frame has an inverted L-shaped structure, with its lower end hinged to the upper end of the second belt conveyor frame. The lower end of the second belt conveyor frame is hinged to one end of the horizontal third belt conveyor frame. The vertical section of the first belt conveyor frame is connected to a pitching and lifting mechanism. The third belt conveyor frame is connected to the second belt conveyor frame on both sides by two first folding telescopic hydraulic cylinders, which can drive the third belt conveyor frame to rotate and maintain perpendicularity and the same direction (i.e., 90°-180°) with the second belt conveyor frame. The second belt conveyor frame is connected to the first belt conveyor frame on both sides by two second folding telescopic hydraulic cylinders, which can lift the second belt conveyor frame. The frame is folded to be perpendicular to the first belt conveyor frame. An electric roller is installed at the free end of the upper horizontal section of the first belt conveyor frame, and a driven roller is installed at the free end of the horizontal section of the third belt conveyor frame. The first, second, and third belt conveyor frames between the electric roller and the driven roller are equipped with idlers to support and lift the material-carrying belt. The material-carrying belt is sleeved on the electric roller and the driven roller. Multiple sets of cantilever belt counter-pressure rollers are symmetrically arranged on both sides of the length of the material-carrying belt. When the multiple sets of cantilever belt counter-pressure rollers are located on both sides of the back of the first, second, and third belt conveyor frames, they serve to support or press the material-carrying belt. They are located at the bends on the front of the first, second, and third belt conveyor frames.

[0008] Furthermore, the driven roller is rotatably connected to two sliding bearing seats at both ends. Two sliding grooves are provided on the upper and lower sides of the two sliding bearing seats. The two sliding grooves are movably engaged with two sliding columns. A horizontal U-shaped groove is provided on the side wall of the third section of the conveyor frame opposite to the sliding bearing seat. The side of the sliding bearing seat away from the free end of the third section of the conveyor frame is fixedly connected to the cylinder rod of the tension adjustment telescopic hydraulic cylinder. The cylinder seat of the tension adjustment telescopic hydraulic cylinder is hinged to the tension belt hinge seat provided on the side of the third section of the conveyor frame.

[0009] Furthermore, the discharge end of the aforementioned vertically bent Z-shaped belt conveyor is equipped with a bottom scraper plate, which includes a scraper, a scraper mounting plate, and a connecting plate. The scraper is made of hard rubber and elastically abuts against the belt. The lower end of the scraper is provided with a T-shaped part along its length. The upper end of the scraper mounting plate is provided with an embedded T-shaped groove. The T-shaped part is embedded into the embedded T-shaped groove by means of expansion. The scraper mounting plate is fixed to multiple rubber elastic blocks by multiple spaced connecting plates. The multiple rubber elastic blocks are fixedly connected to a row of multiple cantilever plates. Each cantilever plate is fixedly connected to an elastic mechanism.

[0010] Furthermore, the aforementioned elastic mechanism includes a bottom scraper tube with two sleeves fixedly connected to both ends. The two sleeves are movably embedded into the vertical U-grooves of two inverted U-shaped seats. The tops of the two U-shaped seats are fixedly connected to the side panels of the frame. An adjusting screw is fixedly connected to the top of the sleeve. The adjusting screw passes through a horizontal plate set on the upper part of the U-shaped seat and is connected to an adjusting nut. A compression spring is installed between the adjusting nut and the horizontal plate, and the compression spring is sleeved on the adjusting screw.

[0011] Furthermore, the discharge end of the aforementioned vertically bent Z-shaped belt conveyor is equipped with a discharge hopper, the bottom of which faces the inlet end of the prefabricated conveyor corridor. The outlet width of the discharge hopper is no greater than the belt width of the prefabricated conveyor corridor. A frame is installed near the bottom of the discharge hopper, and the frame is fixedly connected by one longitudinal rod and multiple transverse rods. Rubber baffles are installed around the discharge outlet of the discharge hopper, and the rubber baffles can maintain elastic contact with the belt of the prefabricated conveyor corridor.

[0012] Compared with the prior art, the beneficial effects of this utility model are that it sets up a pitch lifting mechanism that is hinged to the rotating disk, and the vertical bending Z-shaped belt conveyor is installed on the pitch lifting mechanism. The pitch of the pitch lifting mechanism is controlled by the pitch hydraulic cylinder, thereby adjusting the angle of the vertical bending Z-shaped belt conveyor. This allows for better connection with the discharge end of the material picking device and the inlet end of the conveying corridor during assembly. It enables integrated operation and solves the problem of large workload and poor effect of manual loading, unloading and adjusting of mobile telescopic conveyors and docking of material picking devices and prefabricated conveying corridors during the excavation of long and deep foundation pits in tunnels. This improves the efficiency and effectiveness of soil conveying. Attached Figure Description

[0013] Figure 1 Schematic diagram of the three-dimensional structure of the discharge belt conveyor Figure 1 ;

[0014] Figure 2 Schematic diagram of the three-dimensional structure of the discharge belt conveyor Figure 2 ;

[0015] Figure 3 This is a side view of the discharge belt conveyor (with the belt removed).

[0016] Figure 4 This is an enlarged structural diagram of the driven roller mounting location;

[0017] Figure 5 This is a side view of the discharge belt conveyor from another perspective (with the belt removed).

[0018] Figure 6 This is a three-dimensional structural diagram of the pitching mechanism;

[0019] Figure 7 A three-dimensional structural diagram of the pitching frame from another perspective;

[0020] Figure 8 This is a front view schematic diagram of the pitching mechanism;

[0021] Figure 9 This is a top view of the elevation frame structure.

[0022] Figure 10 This is a three-dimensional structural diagram of the first section of the belt conveyor frame;

[0023] Figure 11 This is a three-dimensional structural diagram of the first section of the belt conveyor frame from another perspective.

[0024] Figure 12 This is a side view of the first section of the belt conveyor frame.

[0025] Figure 13 This is a front view structural diagram of the first section of the belt conveyor frame;

[0026] Figure 14 for Figure 13 Schematic diagram of the cross-sectional structure of the middle AA section;

[0027] Figure 15 This is a rear view structural diagram of the first section of the belt conveyor frame;

[0028] Figure 16 This is a top view of the first section of the belt conveyor frame.

[0029] Figure 17 A three-dimensional structural diagram of the first / second / third inner support frame;

[0030] Figure 18 This is a three-dimensional structural diagram of the second section of the belt conveyor frame;

[0031] Figure 19 This is a three-dimensional structural diagram of the second section of the conveyor belt frame from another perspective;

[0032] Figure 20 This is a front view structural diagram of the second section of the belt conveyor frame;

[0033] Figure 21 This is a side view of the second section of the belt conveyor frame.

[0034] Figure 22 This is a rear view structural diagram of the second section of the belt conveyor frame;

[0035] Figure 23 for Figure 22 Schematic diagram of the cross-sectional structure of the middle AA section;

[0036] Figure 24 This is a three-dimensional structural diagram of the third section of the belt conveyor frame;

[0037] Figure 25 This is a three-dimensional structural diagram of the third section of the conveyor belt frame from another perspective.

[0038] Figure 26 This is a side view of the third section of the belt conveyor frame.

[0039] Figure 27 This is a top view of the discharge hopper structure.

[0040] Figure 28 Side view of the discharge hopper;

[0041] Figure 29 A schematic diagram of the conveyor belt structure is provided.

[0042] Figure 30 A side view diagram illustrating the structure of the conveyor belt for improving efficiency;

[0043] Figure 31 This is a schematic diagram of the installation structure of the bottom scraper.

[0044] Figure 32 This is a side view of the bottom scraper structure.

[0045] Figure 33 A side view of the U-shaped bracket mounting location;

[0046] Figure 34 A schematic diagram of the front view of one end of the bottom scraper;

[0047] Figure 35 This is a front view schematic diagram of the bottom scraper structure. Detailed Implementation

[0048] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0049] Example 1

[0050] like Figure 1-35As shown, the discharge conveyor belt for a vertical hoist in a long and deep foundation pit includes a pitching and lifting mechanism 4 and a vertical bending Z-shaped conveyor belt 3. The vertical bending Z-shaped conveyor belt 3 is mounted on the pitching and lifting mechanism 4. The pitching and lifting mechanism 4 is a strip frame structure. One end of the pitching and lifting mechanism 4 is hinged to the strip panel 201 of the rotating disk 2. The rotating disk 2 is mounted on the traveling mechanism 1. Two pitching hydraulic cylinders 402 are hinged to both sides of the other end of the pitching and lifting mechanism 4. The other end of the two pitching hydraulic cylinders 402 is hinged to the hinge seat 20101 of the strip panel 201. After the pitching hydraulic cylinders 402 are retracted, the pitching and lifting mechanism 4 can be placed on the strip panel 201. The pitching mechanism 4 is controlled by the pitching hydraulic cylinder 402, which in turn adjusts the angle of the vertical bending Z-shaped belt conveyor 3, allowing for better connection with the discharge end of the material handling device and the feed end of the prefabricated conveying corridor. This integrated operation solves the problem of large workload and poor efficiency in manually loading, unloading, adjusting the mobile telescopic conveyor and connecting the material handling device with the prefabricated conveying corridor during the excavation of long and deep foundation pits in tunnels, thereby improving the efficiency and effectiveness of soil conveying.

[0051] Specifically, the pitch lifting mechanism 4 includes a pitch frame 401, a pitch hydraulic cylinder 402, and a lifting and telescopic hydraulic cylinder 403. The back of the pitch frame 401 is hinged to one side of the output end of the rotating disk 2. The upper end of the pitch hydraulic cylinder 402 is hinged to the upper end of the pitch frame 401, and the lower end is hinged to the other side away from the hinge point between the rotating disk 2 and the pitch frame 401. The pitch frame 401 has a vertical strip-shaped groove structure. The vertically bent Z-shaped belt conveyor 3 is vertically slidably connected to the groove of the pitch frame 401. Two lifting and telescopic hydraulic cylinders 403 are used, symmetrically arranged on both sides of the vertically bent Z-shaped belt conveyor 3, and the lifting and telescopic... The cylinder seat of the retracting hydraulic cylinder 403 is fixedly connected to the pitching frame 401. The end of the cylinder rod of the lifting and telescopic hydraulic cylinder 403 is hinged to the top of the vertical end of the vertical bending Z-shaped belt conveyor 3. The pitching hydraulic cylinder 402 controls the pitching frame 401 to remain vertical and return it to its initial position when not in use. The lifting and telescopic hydraulic cylinder controls the lifting and lowering of the vertical bending Z-shaped belt conveyor 3, achieving optimal placement for feeding. Both the pitching hydraulic cylinder 402 and the lifting and telescopic hydraulic cylinder 403 are used in pairs, enabling stable pitch support and lifting / telescopic movement. To ensure the stability of the vertical bending Z-shaped belt conveyor... The sliding connection features two symmetrically arranged lifting grooves 404 on both sides of the groove of the pitch frame 401. Two sliding connection structures 405, matching the two lifting grooves 404, are installed on both sides of the vertical section of the vertically bent Z-shaped belt conveyor 3. The groove structure provides stable and reliable support, while the sliding grooves and sliding connection structures enable sliding extension and retraction, ensuring a stable and reliable connection. Each sliding connection structure 405 includes two rectangular sliding columns 406 on both sides of the first belt conveyor frame 301. Multiple wear-resistant strips 4 are provided on both sides of the lifting grooves 404 that contact the two rectangular sliding columns 406. 07. Multiple wear-resistant strips 407 are evenly arranged along the length of the rectangular sliding column 406. The wear-resistant strips contact the lifting slide 404 to achieve the sliding connection of the rectangular sliding column 406. This reduces the contact area, reduces friction, improves the stability of expansion and contraction, and avoids jamming caused by excessive friction. The two ends of the wear-resistant strips 407 are provided with slopes facing the lifting slide 404 to facilitate entry and exit from the lifting slide 404. The rectangular sliding column 406 includes a channel steel and a sealing plate welded to the groove of the channel steel. The sealing plate is welded to the first section of the belt conveyor frame 301. This structure has high rigidity and strength, provides stable and reliable support, and is easy to manufacture.

[0052] Specifically, the pitch frame 401 includes two channel steels 40101 and a first frame 40102. The two channel steels 40101 are fixedly connected near the lower bottom by the first frame 40102, and the two lifting slides 404 provided thereon are arranged opposite each other. This structure is a frame structure with a U-shaped top. While ensuring rigidity and strength, the structure is greatly lightened and the cost is lower. Near the upper outer side of the two channel steels 40101, two second reinforcing frames 40103 are respectively provided to ensure that the channel part of the channel steel 40101 can ensure rigidity and strength when used as a lifting slide, and improve the stability of lifting and support. The bottom of the first frame 40102 is provided near the top of the hinge strip panel 201, on which a first pitch hinge seat 2 is provided. The second pitch hinge seat 40104 of 0101 has two pitch hinge seats 40105 located at the upper middle position of the bottom of the two channel steels 40101, which are used to connect the cylinder rods of the two pitch hydraulic cylinders 402. The pitch hinge seats 40105 are welded to the second reinforcing frame 40103. The cylinder seat of the pitch hydraulic cylinder 402 is hinged to the second pitch hinge seat 20102 located on the strip panel 201. Specifically, the first frame 40102 includes an L-shaped cross-section side plate 40106, a vertical plate 40107, and a horizontal plate 40108. The horizontal plate 40108 is made up of multiple vertically and horizontally spaced pieces, and is formed by welding three vertical plates 40107 at even intervals to form a groove frame structure. Two channel steels 40101 are welded to both ends of the groove frame structure. Multiple L-shaped side plates 40106 are used, each welded between two adjacent transverse plates 40108 and to the outside of the vertical plates 40107 on the bottom and sides of the channel steel 40101. This frame structure can meet the fixed connection of the channel steel. Specifically, each transverse plate 40108 has upward extension plates 40109 at both ends. The extension plates 40109 are provided with welding side grooves 40110, which are welded to the bottom, top, and back of the channel steel 40101. This structure facilitates frame welding, and the stepped structure provides better welding stability, more reliable connection, and better support stability. The welding step 40111 provided at the bottommost extension plate 40109 connects to the channel steel 40101. 1. The bottom and back are welded, leaving a length on the top surface of the channel steel to support the pulley 30208; the bottom of the channel steel 40101 is also provided with a channel steel reinforcing rib plate 40115, which serves to reinforce the channel steel, improve its rigidity and strength, and provide better support stability; the second reinforcing frame 40103 includes a reinforcing top plate 40112, a reinforcing bottom plate 40113, and multiple reinforcing connecting plates 40114. The reinforcing top plate 40112 overlaps with the top of the channel steel and is fixed by welding. The reinforcing bottom plate 40113 is welded to the bottom of the reinforcing top plate 40112 through multiple reinforcing connecting plates 40114. The reinforcing bottom plate 40113 and multiple reinforcing connecting plates 40114 are welded to the outside of the channel steel 40101. This structure can serve to reinforce the channel steel.

[0053] The vertical bending Z-shaped belt conveyor 3 includes a first belt conveyor frame 301, a second belt conveyor frame 302, a third belt conveyor frame 303, and a lifting and carrying belt 304. The first belt conveyor frame 301 has an inverted L-shaped structure, with its lower end hinged to the upper end of the second belt conveyor frame 302. The lower end of the second belt conveyor frame 302 is hinged to one end of the horizontal third belt conveyor frame 303. The vertical section of the first belt conveyor frame 301 is connected to the pitching and lifting mechanism 4. The third belt conveyor frame 303 is connected to the second belt conveyor frame 302 on both sides by two first folding telescopic hydraulic cylinders 305, which can drive the third belt conveyor frame 303 to rotate and maintain perpendicularity and the same direction (i.e., 90°-180°) with the second belt conveyor frame 302. The frame 302 is connected to the first belt conveyor frame 301 on both sides by two second folding telescopic hydraulic cylinders 317, which can fold the second belt conveyor frame 302 to be perpendicular to the first belt conveyor frame 301. An electric roller 306 is installed at the free end of the upper horizontal section of the first belt conveyor frame 301, and a driven roller 307 is installed at the free end of the horizontal section of the third belt conveyor frame 303. Idler rollers 308 supporting the lifting material carrier belt 304 are installed between the electric roller 306 and the driven roller 307 on the first belt conveyor frame 301, the second belt conveyor frame 302, and the third belt conveyor frame 303. The lifting material carrier belt 304 is sleeved on the electric roller 306 and the driven roller 307. The lifting material carrier belt 304 is symmetrically arranged on both sides along its length. Multiple sets of cantilever belt counter-pressure rollers 314 are installed. These rollers are positioned on either side of the back of the first belt conveyor frame 301, the second belt conveyor frame 302, and the third belt conveyor frame 303, respectively, to support or press and lift the material-carrying belt 304. They are located at the bends on the front of the first belt conveyor frame 301, the second belt conveyor frame 302, and the third belt conveyor frame 303. The operating principle is as follows: The vertically bent Z-shaped belt conveyor is controlled to rise and fall to the set material collection position. Once the position is reached, the vertically bent Z-shaped belt conveyor is started. After stable operation, the soil excavated from the deep foundation pit is fed into the inlet, and the material is discharged outside the deep foundation pit and transported away by other equipment. When the size of the deep foundation pit is less than the set value Amm, the tension adjustment telescopic hydraulic cylinder is controlled to release the lifting mechanism. Raise the material-carrying belt, control the lifting of the first section of the belt conveyor frame to its highest position, then control the second folding telescopic hydraulic cylinder to rotate the second section of the belt conveyor frame until it is perpendicular to the first section. Finally, control the first folding telescopic hydraulic cylinder to rotate the third section of the belt conveyor frame until it is on the same horizontal plane as the second section. Again, control the tensioning telescopic hydraulic cylinder to tension the lifting material-carrying belt. After tensioning, start the vertical bending Z-shaped belt conveyor. If the digging depth is greater than the set value B mm, where B is greater than A+C, and C is the maximum lifting height of the first section of the belt conveyor frame, then release the lifting material-carrying belt, control the lifting of the first section of the belt conveyor frame to its highest position, and then control the first folding telescopic hydraulic cylinder to rotate the third section of the belt conveyor frame until it is perpendicular to the second section.Finally, the second folding telescopic hydraulic cylinder is controlled to rotate the second section of the conveyor belt frame to the same vertical direction as the first section, tensioning the lifting conveyor belt. After tensioning, the vertical bending Z-shaped conveyor belt is started to operate until the deep foundation pit excavation at the set position is completed. Then, the first section of the conveyor belt frame is raised to its highest position, and the pitch angle of the vertical bending Z-shaped conveyor belt is reset to its initial position via the pitch lifting mechanism. Finally, the traveling mechanism is controlled to move to the next position to excavate the deep foundation pit and lift the soil.

[0054] This three-section frame vertical bending Z-shaped belt conveyor can adapt to a wider range of excavation and transportation with high drops, and is easy and quick to control, allowing for real-time adjustments.

[0055] To facilitate rapid switching between different states of the belt conveyor, the driven roller 307 is rotatably connected to two sliding bearing seats 315 at both ends. Each of the two sliding bearing seats 315 has two sliding grooves 309 on its upper and lower sides, which are movably engaged with two sliding columns 310. A horizontal U-shaped groove 30305 is provided on the side wall of the third section of the belt conveyor frame 303 directly opposite the sliding bearing seat 315. The side of the sliding bearing seat 315 away from the free end of the third section of the belt conveyor frame 303 is fixedly connected to the cylinder rod of the tension adjustment telescopic hydraulic cylinder 311. The cylinder seat of the tension adjustment telescopic hydraulic cylinder 311 is hinged to the third section of the belt conveyor frame. The tension belt hinge seat 312 on the side of 303 uses a tension adjustment telescopic hydraulic cylinder to control the position of the driven roller 307, which can realize the tensioning and loosening of the lifting material belt. Before the conversion (such as during the rotation of the first section of the belt conveyor and the second belt conveyor), the lifting material belt needs to be loosened first. After the conversion, it is tensioned again. This method can avoid belt damage caused by force during the rotation of the first section of the belt conveyor and the second belt conveyor, thus playing a protective role. It also reduces the excessive friction force at the rotation hinge point of the first section of the belt conveyor and the second belt conveyor after being subjected to force, making it difficult to rotate around the hinge point and reducing energy consumption.

[0056] The lifting conveyor belt 304 includes a belt body 3041 and material storage hoppers 3042. A ring of material storage hoppers 3042 is evenly arranged on the outer surface of the belt body 3042. Skirt baffles 3043 are provided on both sides of each ring of material storage hoppers 3042. The material storage hoppers 3042 and the skirt baffles 3043 form a material storage trough. During lifting, the material storage trough moves the material upwards. When it reaches the free end and moves downwards, it automatically falls. One side of the belt body 3041 is 15-20cm wider than the skirt baffle 3043, forming a pressing section 3044. The inner flat surface of the lifting conveyor belt 304 is in contact with the idler rollers, and the pressing sections on both sides can be in contact with the cantilever belt counter-pressure rollers 314 to limit the belt movement. This allows the lifting conveyor belt 304 to move smoothly under the drive of the electric rollers, smoothly lifting the material from the pit to the top of the pit for transfer.

[0057] The first section of the belt conveyor frame 301 with an inverted L-shaped structure includes an inverted L-shaped first wall panel 30101 and a first inner support frame 30102. Two first wall panels 30101 are used, and the two first wall panels 30101 are fixedly connected by multiple first inner support frames 30102 to form the frame structure of the first section of the belt conveyor frame 301. The multiple first inner support frames 30102 are arranged along the L-shaped path length of the first wall panels 30101. A first reinforcing plate 30103 is provided on the outer side of the top horizontal free end of the two first wall panels 30101 to form an end reinforcement structure. The end reinforcement structure has a horizontal first U-shaped notch 30104. A bearing support 30105 for mounting an electric roller 306 is welded to the outside. The bearing support 30105 has a horizontal strip-shaped through hole 30119 for mounting the electric roller bearing seat 316 via bolts. A vertical adjustment fixing plate 30106 is provided on the bearing support 30105 away from the opening of the U-shaped notch 30104. An electric roller position adjustment screw 30107 is screwed onto the vertical adjustment fixing plate 30106. One end of the electric roller position adjustment screw 30107 abuts against the bottom connecting plate of the electric roller bearing seat 316. When the position of the electric roller needs to be adjusted, the mounting bolts are loosened, and the electric roller position adjustment screw is rotated, thereby driving the electric roller... The roller is moved towards the end and adjusted to a suitable position. The electric roller bearing seat is then locked to the bearing support with bolts, enabling the electric roller to be positioned. The position adjustment is convenient and quick, thereby allowing for belt tension adjustment, improving the equipment's adaptability and application range, and facilitating installation. An end baffle 30108 is fixedly connected to the opening of the U-shaped notch 30104. Two first edge baffles 30109 are provided along the two edges of the first wall plate 30101 along its length. First wall plate reinforcing ribs 30110 are arranged at intervals between the two first edge baffles 30109. These reinforcing ribs, in conjunction with the first edge baffle structure integrated with the first wall plate, can play a role in reinforcing the belt tension. The function of the solid wall panel is to make the wall panel more rigid and stronger, and to provide better support stability. Two top telescopic hinge seats 30111 are set at the top horizontal section near the bend between the two first wall panels 30101, which are connected to the lifting and telescopic hydraulic cylinder 403. A telescopic push shaft 30112 is fixedly connected between the two top telescopic hinge seats 30111. The top telescopic hinge seats 30111 are set with a smooth arc transition towards the vertical section. Reinforcing ribs are set on the outside of the top telescopic hinge seats 30111. The top telescopic hinge seats 30111 of this structure provide stable and reliable support. Moreover, the telescopic push shaft is used to connect them as one unit, which improves the telescopic stability and also strengthens the stability of the first belt conveyor frame.The lower ends of the two first wall panels 30101 are provided with first hinge holes 30113 for hinged second section conveyor frame 302. First scattering ribs 30114 are provided on the outer side of the first hinge holes 30113 to reinforce them. A second folding hinge double-ear seat 30115 is provided on the right side of the first wall panel 30101 near the lower end, connecting to the tail end of the cylinder seat of the second folding telescopic hydraulic cylinder 317. The second folding hinge double-ear seat 30115 faces downwards. The second folding hinge double-ear seat 30115 is bent, and the outer ears extend to the wall panel stiffener to form a reinforced wall panel, which can improve the stability of the second folding hinge double-ear seat 30115; the first inner support frame 30102 includes two upper and lower support beams 30116 and three support vertical beams 30117 uniformly fixedly connected between the two support beams 30116, and the four ends of the two support beams are provided with four fixed connections to the first wall panel 30101. The connecting flange plate 30118 has a simple inner support frame structure, providing stable support and reliable connection. The idler rollers 308 are arranged at the top of the horizontal section, the right side of the vertical section, and the outer side of the turning end of the first belt conveyor frame 301 (i.e., outside the first inner support frame). Four idler rollers 308 are also arranged on the lower left side of the vertical section of the first belt conveyor frame 301, forming an arc structure. After the lifting conveyor belt 304 at the bent second belt conveyor frame 302, these rollers can closely adhere to the inner surface of the non-conveying side of the lifting conveyor belt 304. The cantilever belt counter-pressure rollers 314 are arranged at the bottom of the horizontal section, the left side of the vertical section, and the outer side of the turning end of the first belt conveyor frame 301. Three sets of cantilever belt counter-pressure rollers 314 are symmetrically arranged on the right side of the vertical section of the first belt conveyor frame 301, forming an arc structure. These rollers can reverse the direction of the lifting conveyor belt 304 at the bent second belt conveyor frame 302, ensuring it closely adheres to the outer surface of the conveying side of the lifting conveyor belt 304.

[0058] The second section of the conveyor frame 302 includes a second wall panel 30201 and a second inner support frame 30202. The second inner support frame 30202 has the same structure as the first inner support frame 30102. Two second wall panels 30201 are used, and the two second wall panels 30201 are fixedly connected in the longitudinal direction by multiple second inner support frames 30202 to form the frame structure of the second section of the conveyor frame 301. A second reinforcing plate 30203 is provided on the outer side of the top of the two second wall panels 30201 to form a bullet-shaped end reinforcement structure. The end reinforcement structure is provided with a second hinge hole 30204 that is hinged to the first hinge hole 30112. A hinged third conveyor frame is provided at the lower end of the two second wall panels 30201. The third hinge hole 30205 of 303 has a second scattering rib plate 30206 on its outer side, which serves to reinforce the third hinge hole. A section of the lower end of the second wall panel 30201 has a third folding hinge double-ear seat 30207 on the right side, which is connected to the cylinder rod of the second folding telescopic hydraulic cylinder 317 and the tail end of the cylinder seat of the first folding telescopic hydraulic cylinder 305. The third folding hinge double-ear seat 30207 is bent downwards, and its outer ears extend to the wall panel rib plate to form a reinforced wall panel. A support pulley 30208 is rotatably connected to the outer side of the reinforced wall panel, and the support pulley 30208 is vertically suspended from the second belt conveyor frame 302. The idler roller 308 is positioned against the right end face of the tilting frame 401. It is also located on the right side of the vertical section of the second belt conveyor frame 302 (i.e., outside the second inner support frame). The idler roller 308 is arranged in two arc-shaped structures: four and five rollers respectively positioned near the lower left and upper left of the vertical section of the second belt conveyor frame 302. These two arc-shaped structures can effectively prevent the lifting conveyor belt 304 from bending at the second belt conveyor frame 302 or the third belt conveyor frame 303 from adhering to the non-conveying side of the inner surface. The cantilever belt counter-pressure roller 314 is positioned on the left side of the vertical section of the second belt conveyor frame 302. The cantilever belt counter-pressure roller 314 is arranged in two and three groups. The components are symmetrically arranged on the right side near the upper and lower ends of the vertical section of the second conveyor frame 302 to form an arc structure. This structure can help the lifting material conveyor belt 304 at the second conveyor frame 302 and the third conveyor frame 303 after the turn to closely adhere to the outer surface of the conveying side of the lifting material conveyor belt 304. The second wall panel 30201 is provided with two second edge baffles 30209 along both sides of the length direction. The two second edge baffles 30209 are provided with second wall panel reinforcing ribs 30210 arranged at intervals between them. The wall panel reinforcing ribs, together with the second edge baffle structure integrated with the second wall panel, can strengthen the wall panel, making the wall panel more rigid and stronger, and providing better support stability.

[0059] The third section of the conveyor frame 303 includes a third wall panel 30301 and a third inner support frame 30302. The third inner support frame 30302 has the same structure as the first inner support frame 30102. Two third wall panels 30301 are used, and the two third wall panels 30301 are fixedly connected in the length direction by multiple third inner support frames 30302 to form the frame structure of the third section of the conveyor frame 301. A third reinforcing plate 30303 is provided on the outer left side of the two third wall panels 30301 to form a bullet-shaped end reinforcement structure. This end reinforcement structure is provided with a fourth hinge hole 30205. The hinge hole 30304 and the right end of the two third wall panels 30301 are provided with a horizontal U-shaped groove 30305. Two sliding columns 310 are provided on the upper and lower sides of the U-shaped groove 30305. The sliding columns 310 slide into the sliding grooves 309 at the upper and lower ends of the sliding bearing seat 315. There are two sliding bearing seats 315, which are rotatably connected to the driven roller 307. The left end of the sliding bearing seat 315 is equipped with a tension adjustment telescopic hydraulic cylinder 311 to drive its horizontal movement. The right end of the U-shaped groove 30305 is provided with a limit baffle 30306, which can strengthen the U-shaped groove and prevent the sliding bearing seat 315 from falling off. Idler rollers 308 are also arranged on the upper side of the third section conveyor frame 303 (i.e., above the third inner support frame). Five additional idler rollers 308 are arranged in an arc shape near the lower left side of the third section conveyor frame 303. This arc shape helps to closely adhere to the inner surface of the non-conveying side of the lifting conveyor belt 304 at the bend of the third section conveyor frame 303. Cantilever belt counter-pressure rollers 314 are also symmetrically arranged on both sides of the bottom length of the third section conveyor frame 303. Two sets of cantilever belt counter-pressure rollers 314 are symmetrically arranged in an arc shape near the upper left side of the third section conveyor frame 303. This arc shape helps to counter-pressure the lifting load at the bend of the third section conveyor frame 303. The belt 304 can reverse and closely adhere to the outer surface of the conveying side of the lifting belt 304; the third wall panel 30301 is provided with two third edge baffles 30307 along both sides of the length direction, and the two third edge baffles 30307 are provided with spaced third wall panel reinforcing ribs 30308. The wall panel reinforcing ribs, together with the third edge baffle structure integrated with the third wall panel, can play the role of reinforcing the wall panel, making the wall panel more rigid and stronger, and better supporting stability; the left end of the third wall panel is provided with a fourth folding hinge double ear seat 30309 that is hinged to the first folding telescopic hydraulic cylinder 305 near the upper part, and the fourth folding hinge double ear seat 30209 is bent to the left.

[0060] The aforementioned vertically bent Z-shaped belt conveyor has a bottom scraper 7 at its discharge end. The bottom scraper 7 is a modular structure installed on the bottom surface of the belt near the end of the vertically bent Z-shaped belt conveyor 3 via an elastic mechanism. The bottom scraper 7 includes a scraper 201, a scraper mounting plate 702, and a connecting plate 703. The scraper 701 is made of hard rubber and elastically abuts against the belt. A T-shaped portion 704 is provided at the lower end of the scraper 701 along its length. An embedded T-shaped groove 705 is provided at the upper end of the scraper mounting plate 702. The T-shaped portion 704 is inserted into the embedded T-shaped groove 705 by an expansion mechanism. For reliable locking, a set screw is provided on the side of the T-shaped groove 705, with its inner end abutting against the T-shaped portion 704 to further lock it in place. The scraper mounting plate 702 is secured by multiple spaced connecting plates 703. 3. Fixed on multiple rubber elastic blocks 706, the multiple rubber elastic blocks 706 are fixedly connected to a row of multiple cantilever plates 707, and each cantilever plate 707 is fixedly connected to the elastic mechanism. The installation method of T-slot 705 and T-shaped part 704 facilitates replacement, and the closer distance between the scraper mounting plate and the blade is, the better it is to ensure the rigidity of the blade and the better the sludge scraping effect. The segmented and spaced connection plate structure ensures the reliability of the connection while reducing the weight of the sludge scraping mechanism. On the other hand, the segmented arrangement of elastic rubber blocks can achieve better elasticity between the scraper mounting plate and the cantilever plate, which is more conducive to buffering and protecting the scraper plate. The spaced arrangement also facilitates material leakage and avoids excessive accumulation on the elastic rubber blocks, which affects the friction between the belt and the material.

[0061] To facilitate accurate positioning and connection between the scraper mounting plate and the elastic rubber block, a horizontal trapezoidal block 716 is provided on the side of the connecting plate 703 facing the elastic rubber block 706. A trapezoidal groove 717 is provided on the side of the rubber elastic block 706 that connects to the connecting plate 703. The trapezoidal block 716 is embedded into the matching trapezoidal groove 717. A connecting screw 718 is provided on the side of the connecting plate 703 facing the trapezoidal block 716. The connecting screw 718 passes through the trapezoidal block 716, the elastic rubber block 706, and the cantilever plate 707 and is locked with a locking nut 719. The matching gradient trapezoidal groove 717 and the trapezoidal block 716 are used for positioning, which can achieve better positioning and facilitate accurate positioning after installation, disassembly and replacement. The bottom scraping mechanism can scrape off soil that is easy to stick during the transportation of soft soil, so as to avoid affecting the belt operation and sticking to the auxiliary support roller.

[0062] Specifically, the elastic mechanism includes a bottom scraper horizontal tube 708, with two sleeves 709 fixedly connected to both ends of the bottom scraper horizontal tube 708. The two sleeves 709 are movably embedded into the vertical U-slots 711 of two inverted U-shaped seats 710. The tops of the two U-shaped seats 710 are fixedly connected to the side walls of the frame. An adjusting screw 712 is fixedly connected to the top of the sleeves 709. The adjusting screw 712 passes through a horizontal plate 714 set on the upper part of the U-shaped seat 710 and is connected to an adjusting nut 713. A compression spring 715 is installed between the adjusting nut 713 and the horizontal plate 714. The compression spring 715 is sleeved on the adjusting screw 712. The U-shaped seat 710 includes an inverted U-shaped plate 721, two side wall plates 722, and a horizontal plate 714. The inverted U-shaped plate 721 is provided with inverted vertical U-slots 711. The U-shaped slot 711 has auxiliary guide side wall plates 722 on both sides. The horizontal plate 714 is fixedly connected to the top of the two side wall plates 722 and close to the top of the inverted U-shaped plate 721. The sleeve 709 is movably sleeved on the bottom scraper horizontal pipe 708 and fixed with two sleeve set screws 720. The screws of the two sleeve set screws 720 rest on the two side wall plates 722. The two sleeve set screws can achieve axial positioning and sleeve locking. The installation adopts a compression spring elastic structure, which can further realize the elastic contact of the scraper. The sleeve connection on both sides also facilitates the adjustment of the angle between the scraper and the belt surface, which is more conducive to the blade scraping off soft soil. The horizontal pipe is inserted into the U-shaped slot at both ends, with screws and nuts, which facilitates the rapid adjustment of the vertical position and the stable connection of the horizontal pipe.

[0063] To facilitate the feeding of excavated soil into the prefabricated conveyor corridor and prevent feed blockage, the aforementioned vertically bent Z-shaped belt conveyor 3 is equipped with a discharge hopper 313 at its discharge end. The bottom of the discharge hopper 313 faces the feed end of the prefabricated conveyor corridor. The outlet width of the discharge hopper 313 is no greater than the feed inlet width of the prefabricated conveyor corridor, ensuring that the discharged soil completely enters the feed end of the prefabricated conveyor corridor to prevent spillage and affecting belt operation. A frame 3131 is installed near the bottom of the discharge hopper 313. The frame 3131 is fixedly connected by one longitudinal rod and multiple transverse rods. The frame 3131, consisting of one longitudinal rod and multiple transverse rods, is installed at the discharge hopper. The fed soil is contained within the frame. Under the loosening effect of 3131, the material can be evenly distributed onto the belt, facilitating discharge and preventing blockage of the discharge hopper outlet. It also buffers the incoming soil, preventing excessive impact from directly hitting the conveyor belt and causing damage over time. Rubber baffles 3132 are installed around the discharge hopper 313 near the discharge port, making contact with the conveyor belt. The elastic rubber baffles 3132 ensure that the incoming soil falls completely onto the belt, reducing the probability of side leakage and minimizing the impact of leaked soil falling onto the belt rollers or electrical equipment, thus improving the stability and safety of the belt conveyor. The hopper 313 is equipped with an electromagnetic vibrator 3133 on its side wall, which allows the material to fall more smoothly into the belt feed area. A spray pipe is installed around the top of the discharge hopper 313 to suppress dust when it is excessive. The discharge hopper 313 includes two first wall panels 3134 in the front-to-back direction and two second wall panels 3135 in the left-to-right direction. The two first wall panels 3134 are fixedly connected to the front and rear ends of the two second wall panels 3135, forming an open structure with a larger upper end and a smaller lower end. The lower ends of the two first wall panels 3134 and the two second wall panels 3135 are fixedly connected to the hopper bottom plate 3136. The bottom plate 3136 has a central opening of the same size as the lower end of the open structure. The material discharge port, the hopper bottom plate 3136 and the first wall plate 3134 and the second wall plate 3135 are respectively provided with a first reinforcing rib plate 3137 and a second reinforcing rib plate 3138. The top of the first wall plate 3134 and the second wall plate 3135 are bent outward with short horizontal plates. The short horizontal plates serve to reinforce the wall plates and facilitate the installation of the dust suppression pipe of the spray. The bottom of the first wall plate 3134 and the second wall plate 3135 are bent outward to facilitate welding with the hopper bottom plate and improve the connection reliability. The first reinforcing rib plate 3137 and the second reinforcing rib plate 3138 are provided with weight reduction holes, which can reduce weight while ensuring rigidity and strength.

[0064] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. A discharge belt conveyor for a vertical lifting machine for long and deep foundation pits, characterized in that, It includes a pitch lifting mechanism (4) and a vertical bending Z-shaped belt conveyor (3). The vertical bending Z-shaped belt conveyor (3) is installed on the pitch lifting mechanism (4). The pitch lifting mechanism (4) is a strip frame structure. One end is hinged to the strip panel (201) of the rotating disk (2). The rotating disk (2) is installed on the traveling mechanism (1). Two pitch hydraulic cylinders (402) are hinged on both sides of the other end of the pitch lifting mechanism (4). The other end of the two pitch hydraulic cylinders (402) is hinged to the hinge seat of the strip panel (201). After the pitch hydraulic cylinders (402) retract, they can place the pitch lifting mechanism (4) on the strip panel (201).

2. The discharge belt conveyor for a vertical lifting machine for long and deep foundation pits according to claim 1, characterized in that, The pitch lifting mechanism includes a pitch frame (401), a pitch hydraulic cylinder (402), and a lifting telescopic hydraulic cylinder (403). The back of the pitch frame (401) is hinged to one side of the output end of the rotating disk (2). The upper end of the pitch hydraulic cylinder (402) is hinged to the pitch frame (401) near the upper end, and the lower end is hinged to the other side away from the hinge point between the rotating disk (2) and the pitch frame (401). The pitch frame (401) is a vertical strip groove structure. The vertically bent Z-shaped belt conveyor (3) is vertically slidably connected in the groove of the pitch frame (401). Two lifting telescopic hydraulic cylinders (403) are used and are symmetrically arranged on both sides of the vertically bent Z-shaped belt conveyor (3). The cylinder seat of the lifting telescopic hydraulic cylinder (403) is fixedly connected to the pitch frame (401). The cylinder rod end of the lifting telescopic hydraulic cylinder (403) is hinged to the top of the vertical end of the vertically bent Z-shaped belt conveyor (3).

3. The discharge belt conveyor for a vertical lifting machine for long and deep foundation pits according to claim 1, characterized in that, The vertical bending Z-shaped belt conveyor (3) includes a first belt conveyor frame (301), a second belt conveyor frame (302), a third belt conveyor frame (303), and a lifting and carrying belt (304). The first belt conveyor frame (301) is an inverted L-shaped structure, with its lower end hinged to the upper end of the second belt conveyor frame (302). The lower end of the second belt conveyor frame (302) is hinged to one end of the horizontal third belt conveyor frame (303). The vertical section of the first belt conveyor frame (301) is connected to the pitching and lifting mechanism (4). The third belt conveyor... The frame (303) is connected to the second section of the conveyor belt frame (302) on both sides by two first folding telescopic hydraulic cylinders (305), which can drive the third section of the conveyor belt frame (303) to rotate and remain perpendicular to and in the same direction as the second section of the conveyor belt frame (302), i.e., 90°-180°. The second section of the conveyor belt frame (302) is connected to the first section of the conveyor belt frame (301) on both sides by two second folding telescopic hydraulic cylinders (317), which can fold the second section of the conveyor belt frame (302) to be aligned with the first section of the conveyor belt frame (301). Maintaining verticality, an electric roller (306) is installed at the free end of the horizontal section on the upper side of the first belt conveyor frame (301), and a driven roller (307) is installed at the free end of the horizontal section of the third belt conveyor frame (303). Idler rollers (308) supporting the lifting conveyor belt (304) are installed on the first belt conveyor frame (301), the second belt conveyor frame (302), and the third belt conveyor frame (303) between the electric roller (306) and the driven roller (307). The lifting conveyor belt (304) is sleeved on the electric roller (306). On the driven roller (307), multiple sets of cantilever belt counter-pressure rollers (314) are symmetrically arranged on both sides of the length direction of the lifting material conveyor belt (304). When the multiple sets of cantilever belt counter-pressure rollers (314) are located on both sides of the back of the first section belt conveyor frame (301), the second section belt conveyor frame (302) and the third section belt conveyor frame (303), they serve as support or press the lifting material conveyor belt (304). When they are located at the bends on the front of the first section belt conveyor frame (301), the second section belt conveyor frame (302) and the third section belt conveyor frame (303), they are located at the bends on the front of the first section belt conveyor frame (301), the second section belt conveyor frame (302) and the third section belt conveyor frame (303).

4. The discharge belt conveyor for a vertical lifting machine for long and deep foundation pits according to claim 3, characterized in that, The driven roller (307) is rotatably connected to two sliding bearing seats (315) at both ends. Two sliding grooves (309) are provided on the upper and lower sides of the two sliding bearing seats (315). The two sliding grooves (309) are movably engaged with two sliding columns (310). A horizontal U-shaped groove (30305) is provided on the side wall of the third section of the belt conveyor frame (303) directly opposite the sliding bearing seat (315). The free end of the sliding bearing seat (315) away from the third section of the belt conveyor frame (303) is fixedly connected to the cylinder rod of the tension adjustment telescopic hydraulic cylinder (311). The cylinder seat of the tension adjustment telescopic hydraulic cylinder (311) is hinged to the tension belt hinge seat (312) provided on the side of the third section of the belt conveyor frame (303).

5. The discharge belt conveyor for a vertical lifting machine for long and deep foundation pits according to claim 1, characterized in that, The vertical bending Z-shaped belt conveyor (3) has a bottom scraper (7) at the discharge end. The bottom scraper (7) includes a scraper (701), a scraper mounting plate (702), and a connecting plate (703). The scraper (701) is made of hard rubber and elastically abuts against the belt. The lower end of the scraper (701) is provided with a T-shaped part (704) along its length. The upper end of the scraper mounting plate (702) is provided with an embedded T-shaped groove (705). The T-shaped part (704) is embedded into the embedded T-shaped groove (705) by means of expansion. The scraper mounting plate (702) is fixed on multiple rubber elastic blocks (706) by multiple spaced connecting plates (703). The multiple rubber elastic blocks (706) are fixedly connected to a row of multiple cantilever plates (707). Each cantilever plate (707) is fixedly connected to the elastic mechanism.

6. The discharge belt conveyor for a vertical lifting machine for long and deep foundation pits according to claim 5, characterized in that, The elastic mechanism includes a bottom scraper tube (708), with two sleeves (709) fixedly connected to both ends of the bottom scraper tube (708). The two sleeves (709) are movably embedded in the vertical U-slots (711) of two inverted U-shaped seats (710). The tops of the two U-shaped seats (710) are fixedly connected to the side walls of the frame. An adjusting screw (712) is fixedly connected to the top of the sleeve (709). The adjusting screw (712) passes through the horizontal plate (714) set on the upper part of the U-shaped seat (710) and is connected to an adjusting nut (713). A compression spring (715) is installed between the adjusting nut (713) and the horizontal plate (714). The compression spring (715) is sleeved on the adjusting screw (712).

7. The discharge belt conveyor for a vertical lifting machine for long and deep foundation pits according to claim 1, characterized in that, The vertical bending Z-shaped belt conveyor (3) is equipped with a discharge hopper (313) at the discharge end. The bottom of the discharge hopper is directly opposite the feed end of the prefabricated conveyor corridor. The outlet width of the discharge hopper (313) is not greater than the belt width of the prefabricated conveyor corridor. The discharge hopper (313) is equipped with a frame (3131) near the bottom. The frame (3131) is fixedly connected by a longitudinal rod and multiple transverse rods. The discharge hopper (313) is equipped with a rubber baffle (3132) around the discharge port. The rubber baffle (3132) can maintain elastic contact with the belt of the prefabricated conveyor corridor.

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