A cantilever concrete feeding device for a vertical shaft

Abstract

The invention discloses a cantilever concrete feeding device for a vertical shaft, wherein a cantilever bracket is fixed at the shaft mouth, the cantilever brackets are fixed by a cross beam, an anti-skid steel plate is arranged on the cantilever bracket; a fixed pulley is arranged on the cantilever bracket, and a winch wire rope connected to a winch is placed on the fixed pulley; a receiving funnel is also arranged on the cantilever bracket, the receiving funnel is connected to a plurality of feeding chutes in sequence below, the last section of the feeding chute is connected to a buffer, the buffer is connected to a plurality of bamboo buckets in sequence, and each feeding chute is connected to the winch wire rope. The device of the invention adopts a brand-new design concept, which reduces the probability of pipe blockage to a minimum while reducing the concrete flow rate to avoid aggregate segregation, and adopts a winch suspension method to make the installation and removal of the feeding system safer and more convenient, and is also conducive to continuous operation during the concrete pouring process, thereby accelerating the construction progress.

Description

Technical Field

[0001] The invention relates to the field of vertical shaft internal shotcrete and lining construction facilities, and in particular to a vertical shaft cantilever concrete feeding device. Background Art

[0002] Vertical shaft construction is the most common structure in the engineering field. During the excavation process, vertical shafts need to be shotcreted. After the excavation is completed, lining operations are required. During both shotcrete and lining construction, the shotcrete materials and concrete need to be vertically transported to the working surface. Therefore, a vertical material discharge system is a method that must be adopted in construction.

[0003] In the traditional construction method, the material chute of the material discharging system is welded and fixed to the shaft wall by means of anchor rods and other measures, and a buffer is installed every 10-20m. The traditional construction method has the following shortcomings: First, as the progress of the project changes, the elevation of the working surface also changes gradually. During the construction process, the operators need to perform multiple installation or removal operations on the shaft wall. The operation in mid-air must also be equipped with other equipment and safety measures to ensure the safety of the operators. The installation and removal work also takes a lot of time; second, the method of fixing the material discharging chute on the shaft wall makes the chute immobile and covers a small working range; third, in the case of a deep shaft, the use of more buffers increases the risk of blockage of the material discharging chute, and it is more difficult to clear the chute after blockage. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a vertical shaft cantilever concrete unloading device, which has obvious advantages in the installation, removal, working range and other aspects of the unloading chute, and is equipped with a special buffer. While reducing the concrete flow rate to avoid aggregate segregation, the probability of pipe blockage is reduced to a minimum, making the unloading system more stable and continuous, and avoiding the risk of pipe blockage and dredging.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A cantilever concrete feeding device for a shaft, wherein a cantilever bracket is fixed at the shaft opening, the cantilever brackets are fixed by a cross beam, and an anti-skid steel plate is arranged on the cantilever bracket; a fixed pulley is arranged on the cantilever bracket, and a winch wire rope connected to a winch is placed on the fixed pulley; a receiving funnel is also arranged on the cantilever bracket, and the lower portion of the receiving funnel is connected to a plurality of feeding chutes in sequence, and the last section of the feeding chute is connected to a buffer, and the buffer is then connected to a plurality of bamboo buckets in sequence; wherein each feeding chute is connected to the winch wire rope; the buffer structure is as follows: it includes a receiving pipe on one side and a connecting pipe on the other side, the receiving pipe and the connecting pipe both have openings, the two openings are arranged oppositely and connected, and the outer edges of the openings are closed by a closed steel plate, the upper opening of the receiving pipe has a buffer flange, and the upper opening of the connecting pipe has a top cover; the upper opening of the receiving pipe is connected to the feeding chute through the buffer flange, and the lower opening of the connecting pipe is connected to the bamboo bucket.

[0007] Furthermore, the cantilever bracket is fixed to the foundation concrete on the wellhead ground through ground anchor rods.

[0008] Furthermore, a safety wire rope is also arranged on the cantilever bracket, and the safety wire rope is used to connect each material discharge chute.

[0009] Furthermore, the material discharge chute includes a material discharge chute body, the upper and lower ends of the material discharge chute body are provided with flanges, and the material discharge chute body is provided with a lifting lug; the winch wire rope is connected to the lifting lug of the material discharge chute through a wire rope clamp.

[0010] Furthermore, there are two lifting ears, which are symmetrically fixed on the body of the discharge chute.

[0011] Furthermore, steel bars with a reinforcing function are distributed inside the body of the discharge chute.

[0012] Furthermore, the bamboo bucket comprises a bamboo bucket body, a hanging ring is fixed on the side of the upper end of the bamboo bucket body, and a hook is fixed on the side of the lower end.

[0013] Furthermore, there are two hanging rings, which are symmetrically fixed on the bamboo barrel body, and there are two hooks, which are symmetrically fixed on the bamboo barrel.

[0014] Furthermore, a plurality of threaded steel bars are fixed in parallel to the outside of the joint section between the receiving pipe and the lower connecting pipe, and the joint section is fixed with a steel plate shell.

[0015] Furthermore, the cantilever bracket is welded by I18 I-beam, and a protective fence and a dense mesh are also arranged on the working platform formed by the cantilever bracket, the crossbeam and the anti-slip steel plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The entire material feeding system is suspended, which is different from the traditional way of fixing the shaft wall. The installation and removal are completed by hoisting with a winch, which greatly shortens the installation and removal time. Especially in the shaft slipform pouring stage, as the slipform rises, the removal speed must meet the speed of the mold body rising. The chute cannot be poured with concrete during the removal. If the time is too long, it will affect the continuity of the slipform pouring and the concrete will easily form cold joints.

[0018] 2. Both installation and removal are completed by winch on the wellhead working platform, avoiding the safety risks of installation and removal in mid-air; at the same time, it also saves the equipment used for lifting personnel and working;

[0019] 3. A specially designed buffer is used, and only one is installed at the bottom of the material chute. By changing the flow direction of concrete, the buffering of concrete and the reduction of aggregate segregation can be achieved. In addition, compared with traditional buffers, the number of installations is reduced, the installation difficulty is reduced, and the risk of pipe blockage and the difficulty of handling after pipe blockage are also reduced;

[0020] 4. This device adopts a suspension method. The steel pipe has a certain flexibility when it is long. The bamboo bucket at the bottom increases the coverage of a single material discharge chute into the warehouse and improves the working range. When constructing a vertical shaft with the same diameter, this device can reduce the number of arrangements of the discharge system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic diagram of the structure of a shaft cantilever concrete feeding device at the wellhead.

[0022] Figure 2 The present invention is a schematic diagram of a discharge chute structure of a vertical shaft cantilever concrete discharge device.

[0023] Figure 3 The invention discloses a bamboo bucket structure schematic diagram of a vertical shaft cantilever concrete feeding device.

[0024] Figure 4 The present invention is a schematic diagram of a buffer structure of a shaft cantilever concrete unloading device.

[0025] Figure 5 It is a schematic diagram of the inner threaded steel of a buffer of a shaft cantilever concrete unloading device of the present invention.

[0026] Figure 6 It is a schematic diagram of the opening of a vertical shaft cantilever concrete unloading device of the present invention.

[0027] Figure 7 It is a schematic diagram of a closed steel plate of a shaft cantilever concrete unloading device of the present invention.

[0028] Figure 8 The utility model is a schematic diagram of the overall structure of a vertical shaft cantilever concrete unloading device of the present invention.

[0029] In the figure: well wall 1; well wall locking concrete 2; foundation concrete 3; wellhead ground 4; ground anchor rod 5; winch wire rope 6; fixed pulley 7; receiving funnel 8; cantilever bracket 9; safety wire rope 10; anti-skid steel plate 11; crossbeam 12; flange 13; material chute body 14; lifting ear 15; steel bar 16; lifting ring 17; bamboo bucket body 18; hook 19; buffer flange 20; receiving pipe 21; top cover 22; connecting down pipe 23; threaded steel bar 24; opening 25; closing steel plate 26. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] A cantilever concrete feeding device for a vertical shaft of the present invention is as follows:

[0032] 1. The material unloading part mainly includes: winch, fixed pulley 7, receiving funnel 8, winch wire rope 6, safety wire rope 10, unloading chute (standard section), buffer, bamboo bucket (soft section chute).

[0033] 2. Wellhead cantilever bracket group: cantilever bracket 9, rear foundation concrete 3, ground anchor rod 5, working platform, cantilever bracket 9 are welded with I18 I-beam, the cantilever part is 1.5 meters long, a triangular support is set up at the bottom of the cantilever section, the triangular support is close to the well wall, the foundation concrete 3 is poured at the rear of the I-beam, the height is 50cm and it is flush with the well wall lock mouth concrete 2, 6 Ø25 L=4.5m ground anchor rods 5 are driven into the concrete as the anchor structure of the entire cantilever bracket group to ensure the force stability of the cantilever section. A 3mm thick anti-skid steel plate 11 is laid on the cantilever frame as a working platform, and a 40cm×40cm window is opened on the anti-skid steel plate 11 for installing the material chute, and a protective fence and a dense mesh are set around the working platform, and the protective fence is 1.2m high. The cantilever frame is laterally provided with three I-beams and the cantilever I-beams are welded as a crossbeam 12 , two of which can be used to install the fixed pulley 7 , and the other one can be used to fix the insurance wire rope 10 .

[0034] 3. The receiving funnel 8 is welded with 6mm steel plates, and the bottom of the funnel is a 10cm high circular structure inserted into the unloading chute.

[0035] 4. Feeding chute: The feeding chute is made of Ø273 6mm thick manganese steel pipe, with a standard section length of 3 meters (for easy installation and removal). Flanges 13 are welded at both ends of the steel pipe, and 6 Ø12 steel bars 16 are welded on the inner wall of the pipe, with a length of 10cm, of which 5cm is welded inside the pipe and 5cm is exposed outside. The main functions are, first, to buffer the pipe during the falling of concrete, and second, to facilitate the docking and centering of the two steel pipes during the installation process, thereby improving the working efficiency of the flange bolt connection. Two lifting ears 15 are welded in the middle part of the feeding chute body 14 with steel bars of the same diameter as the wire rope.

[0036] 5. The winch is installed at the rear of the cantilever bracket, and the fixed pulley 7 is installed on the crossbeam 12 at the upper part of the cantilever bracket. The winch wire rope 6 changes direction through the fixed pulley 7 and then goes vertically downward to the lifting lug 15 on the wall of the standard section pipe, and is connected and fixed by a wire rope clip.

[0037] 6. The diameter of the safety wire rope 10 is the same as that of the winch wire rope 6, and is connected and fixed to the lifting lug 15 on the other side of the standard section by a wire rope clip.

[0038] 7. Buffer: The buffer is made of two non-concentric Ø273 6mm thick manganese steel pipes welded side by side. An opening is made at the intersection of the two pipes. The two pipes are a receiving pipe 21 and a connecting pipe 23. Concrete flows from one pipe to the other through the opening. The opening is 30cm away from the bottom of the receiving pipe and 20cm away from the top of the connecting pipe 23. An openable top cover 22 is made on the top of the connecting pipe 23 to facilitate the unblocking of concrete when congestion occurs. Ø25 threaded steel 24 and 8mm steel plates are wrapped around the connection part to strengthen the connection part. The upper end of the buffer is connected to the discharge chute, and the lower end is connected to the bamboo bucket.

[0039] 8. Bamboo bucket (also known as soft-joint bucket): The bottom of the material feeding system is connected with a bamboo bucket at a height of about 6-9 meters. The height of a single bucket is about 1m. The bucket (bamboo bucket body 18) is formed by curling 1.5mm thick iron sheet. Two rings 17 are set on the upper part of the bucket, and two hooks 19 are set on the lower part, which are nested with each other.

[0040] When the device of the present invention is used, 1. First, the number of required feeding systems is calculated according to the shaft diameter, body characteristics, concrete volume, construction strength, etc., the specific installation position is determined, and the force calculation of each force-bearing structure is completed; 2. The ground anchor rod 5 is installed at the determined position, and 6 Ø25 L=4.5m ground anchor rod 5; 3. Pour foundation concrete 3, the concrete elevation is flush with the wellhead elevation; install the cantilever bracket 9 made of I-beam on the poured foundation concrete 3, the I-beams are welded together in pairs using I18 as a group, and each unloading system is designed with two groups, with a spacing of 85cm between the two groups. The rear of the I-beam is fixed with the above-mentioned ground anchor rod 5 in the form of a hoop, the cantilevered part is 1.5 meters long, and a triangular support is set at the bottom of the cantilevered section, which is close to the well wall; 4. Weld the I-beam crossbeam 12 to the cantilevered I-beam (it can also be hoisted into place after the overall assembly and welding is completed), a total of 3 pieces are set, 2 of which are used to install the fixed pulley 7, and the other 1 is used to fix the insurance wire rope 10; 5 1. Lay a 3mm thick anti-skid steel plate 11 on the cantilevered I-beam as a working platform, open a 40cm×40cm window on the anti-skid steel plate 11 for installing the unloading chute, and set protective fences and dense mesh around the working platform. The protective fence is 1.2m high; 6. Connect the buffer and the first standard section with flanges, and then use a crane and a winch to gradually install the first section in place; 7. Use a winch to install the remaining standard sections one by one. The standard sections are connected with flanges, and personnel can complete it by standing on the working platform. The lifting lugs 15 and wire ropes of each standard section are fixed with clamps, and the safety wire ropes 10 are installed simultaneously; 8. When the standard sections are installed in place, the bamboo buckets are manually hung in series one by one under the buffer.

[0041] When dismantling the device, as the elevation of the working surface (such as concrete pouring) continues to rise, the hoist is started on the working platform. Each lifting height is the height of one standard section. After the bolts are removed manually, the device is moved out of the site and dismantled section by section. When the construction is completed, the buffer is lifted out by a crane and the dismantling is completed.

[0042] The concrete is transported to the wellhead platform by a tank truck and then reversed to the receiving funnel 8 of the unloading system, and then unloaded. The concrete passes through the receiving funnel 8-standard section-buffer-bamboo bucket, and finally enters the warehouse. The bamboo bucket can be flexibly moved by manual traction to the location where concrete needs to be entered for unloading and pouring.

[0043] The device of the present invention uses a winch wire rope 6 to suspend the material chute on the top cantilever platform. There is no other fixing method between the entire material chute and the shaft wall. A buffer is set at the bottom of the material chute to buffer the concrete and slow down the separation of concrete aggregates. A bamboo bucket is connected below the buffer for material distribution. The device of the present invention greatly reduces the difficulty of installation and removal, and also reduces the safety risks during installation and removal. The buffer reduces the number of buffers installed while reducing the falling speed of concrete and slowing down the segregation of aggregates. Each material chute only needs to install one buffer at the bottom to meet the requirements. The material chute is suspended in a certain flexibility during the construction of a deeper shaft. The bamboo bucket at the bottom can cover a larger range, which increases the working range of a single-trip material chute.

[0044] The above specific implementation methods and drawings are only common embodiments of the present invention. Obviously, various additions, modifications and substitutions can be made without departing from the spirit and scope of the present invention defined in the claims. Those skilled in the art should understand that the present invention can be changed in form, structure, layout, proportion, material, element, component and other aspects according to the specific environment and work requirements in practical applications without departing from the invention criteria. Therefore, the embodiments disclosed herein are only for illustration and not limitation, and the scope of the present invention is defined by the attached claims and their legal equivalents, and is not limited to the previous description.

Claims

1. A cantilever concrete feeding device for a vertical shaft, characterized in that: A cantilever bracket (9) is fixed at the shaft opening, the cantilever brackets (9) are fixed by a crossbeam (12), and an anti-slip steel plate (11) is arranged on the cantilever bracket (9); a fixed pulley (7) is arranged on the cantilever bracket (9), and a winch wire rope (6) connected to a winch is placed on the fixed pulley (7); The cantilever bracket (9) is also provided with a material receiving hopper (8), and the lower part of the material receiving hopper (8) is connected to a plurality of material discharge chutes in sequence, and the last section of the material discharge chutes is connected to a buffer, and the buffer is connected to a plurality of bamboo buckets in sequence; wherein each material discharge chutes is connected to a winch wire rope (6); The buffer structure comprises a receiving pipe (21) on one side and a connecting lower pipe (23) on the other side. The receiving pipe (21) and the connecting lower pipe (23) both have openings (25). The two openings (25) are arranged opposite to each other and are connected. The outer edges of the openings (25) are closed by a closed steel plate (26). The upper opening of the receiving pipe (21) has a buffer flange (20), and the upper opening of the connecting lower pipe (23) has a top cover (22). The upper opening of the receiving pipe (21) is connected to a material discharge chute via the buffer flange (20), and the lower opening of the connecting lower pipe (23) is connected to a bamboo barrel.

2. A shaft cantilever concrete feeding device according to claim 1, characterized in that: The cantilever bracket (9) is fixed to the foundation concrete (3) on the wellhead ground (4) via a ground anchor rod (5).

3. A shaft cantilever concrete feeding device according to claim 1, characterized in that: A safety wire rope (10) is also provided on the cantilever bracket (9), and the safety wire rope (10) is used to connect each material discharge chute.

4. A shaft cantilever concrete feeding device according to claim 1, characterized in that: The material discharge chute comprises a material discharge chute body (14), the upper and lower ends of the material discharge chute body (14) are provided with flanges (13), and the material discharge chute body (14) is provided with a lifting lug (15); the winch wire rope (6) is connected to the lifting lug (15) of the material discharge chute through a wire rope clamp.

5. A shaft cantilever concrete feeding device according to claim 4, characterized in that: The lifting ears (15) are provided in two pieces and are symmetrically fixed on the material discharge chute body (14).

6. A shaft cantilever concrete feeding device according to claim 4, characterized in that: Steel bars (16) with a reinforcement function are also distributed in the material discharge chute body (14).

7. A shaft cantilever concrete feeding device according to claim 1, characterized in that: The bamboo joint bucket comprises a bamboo joint bucket body (18), a hanging ring (17) is fixed to the upper side of the bamboo joint bucket body (18), and a hook (19) is fixed to the lower side.

8. A shaft cantilever concrete feeding device according to claim 7, characterized in that: The hanging rings (17) are provided in two pieces and are symmetrically fixed on the bamboo barrel body (18); the hooks (19) are provided in two pieces and are symmetrically fixed on the bamboo barrel (18).

9. A shaft cantilever concrete feeding device according to claim 1, characterized in that: A plurality of threaded steel bars (24) are fixed in parallel to the outside of the joint section between the receiving pipe (21) and the connecting lower pipe (23), and the joint section is fixed with a steel plate outer shell.

10. The cantilever concrete feeding device for a vertical shaft according to claim 1, characterized in that: The cantilever bracket (9) is welded from I18 I-beams, and a protective fence and a dense mesh are also provided on the working platform formed by the cantilever bracket (9), the crossbeam (12) and the anti-slip steel plate (11).

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