Pumping device suitable for pumping ultra-high performance concrete

Abstract

The utility model discloses a pumping device suitable for pumping ultra-high performance concrete. Comprising a rail car supported on a rail laid in a tunnel in a sliding manner, a frame fixedly mounted on the rail car, a mixing station supported on the frame and used for mixing concrete powder to prepare concrete, and a pumping system supported on the frame and used for pumping the prepared concrete. The pumping system is arranged below the mixing plant, and an upper feeding port of the pumping system is communicated with a lower discharging port of the mixing plant. The pumping device disclosed by the utility model can slide along the interior of a tunnel, so that the field construction efficiency is improved, and the configuration required by personnel is reduced; and the pumping storage time of the ultra-high performance concrete can be effectively shortened, the concrete can be transferred into a pumping system for pumping operation after being stirred, the overall structure is simple and compact under the condition that the requirements of the slurry preparation function and the pumping function of equipment are met, the preparation cost can be effectively reduced, and the construction requirement of a tunnel with a narrow underground space is met.

Description

Technical Field

[0001] The utility model relates to the technical field of ultra-high performance concrete spraying, in particular to a pumping device suitable for ultra-high performance concrete pumping. Background Art

[0002] With the continuous and rapid development of tunnel construction, my country ranks first in the world in terms of the number and length of tunnels. As an important process for tunnel shaft support, concrete spraying support is widely used in railways, highways, water conservancy, national defense, metallurgy and other fields. As the most innovative cement-based engineering material in the past 30 years, UHPC ultra-high performance concrete has gradually been applied to bridges, buildings, tunnels and special projects. Its principle is to optimize the combination of active fillers and inert fillers through the principle of close stacking to form a dense and uniform material matrix. Under extremely low water-cement ratio environment, the porosity caused by cement hydration is very low, forming an almost impermeable matrix with ultra-high durability, ultra-high mechanical properties, ultra-strong fluidity and ultra-high viscosity. After field investigation, it was found that some special tunnel sections need to use UHPC ultra-high-strength concrete for initial support, but the existing pumping hopper structures on the market have problems such as low pumping efficiency and substandard pumping quality. In addition, the pumping hopper is not easy to repair after being damaged during operation. The hopper storage structure is not suitable for UHPC concrete. In addition, the tunnel operation space is limited, the construction environment is harsh, and other factors easily lead to high construction costs, UHPC concrete solidification, and the hopper body is difficult to clean. Therefore, it is extremely important to design a hopper device suitable for UHPC ultra-high performance concrete pumping for UHPC spraying and mixing operations.

[0003] Chinese patent CN217326515U discloses a concrete pump truck hopper that is easy to disassemble and clean. The concrete pump truck hopper that is easy to disassemble and clean is provided with a fixed track, a limited slide groove is provided inside the fixed track, a sliding block is provided inside the fixed track, fixed blocks are provided on both sides of the sliding block, and a fixed bracket is connected to the outer surface of the sliding block. The fixed bracket forms a left-right moving structure through the sliding block and the fixed block, so that the device can adapt to different installation environments when installed, and a flip baffle is provided. The flip baffle forms a flip structure through a fixed shaft, so that the device is convenient for cleaning the inside of the hopper body. The patent mechanically limits the flip baffle through a fixed plate, does not provide a buffer device, and the rotating pair constructed between the flip baffle and the hopper body through a fixed shaft is located at the lower edge of the inner side of the hopper. If the cleaning is not timely, it is very easy to cause the concrete to solidify and stick, resulting in the flip baffle being unable to open normally. In addition, it is easy to cause the fixed plate limit failure during the normal operation of the hopper.

[0004] Chinese patent CN211499821U discloses a new type of hopper for a concrete pump truck, which is provided with a rotating rod by sleeve-fitting the two ends of the shaft rod, so that the rotating shaft rod drives the rotating rod 1 to rotate, and the rotating rotating rod 1 drives the rotating rod 2 to move, so that the piston block connected to the rotating rod 2 reciprocates along the inner wall of the piston cylinder, and the two reciprocating piston blocks increase the efficiency of the hopper in transporting concrete, and avoid the stones in the concrete and the piston block from being squeezed and collided at the hopper outlet when the piston block pushes the concrete, thereby avoiding the stones from damaging the piston block when pouring the concrete. The hopper body of the patent is provided with a grille, but the grille is fixed and restricted on the hopper body, and the grille cannot be disassembled, and the internal space cannot be effectively cleaned after the operation is completed. Utility Model Content

[0005] The utility model provides a pumping device suitable for ultra-high performance concrete pumping, so as to solve the technical problems of low pumping efficiency and high construction cost in the existing device.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A pumping device suitable for ultra-high performance concrete pumping comprises: a rail car slidably supported on a track laid in a tunnel, a frame fixedly mounted on the rail car, a mixing station supported on the frame for mixing concrete powder to prepare concrete, and a pumping system supported on the frame for pumping the prepared concrete; the pumping system is arranged below the mixing station, and an upper feed port of the pumping system is connected to a lower discharge port of the mixing station.

[0008] Furthermore, the pumping system includes a hopper and a distribution valve box for distributing concrete pumping; the hopper includes an open hopper shell, the hopper shell and the distribution valve box space are arranged up and down, and the upper opening of the hopper shell is connected to the lower discharge port of the mixing station, and the lower contraction of the hopper shell is connected to the distribution valve box.

[0009] Furthermore, the upper opening and the lower contraction of the hopper shell are detachably connected to the mixing station and the distribution valve box respectively; and an inspection door for maintenance is also detachably connected to one of the side walls of the hopper shell.

[0010] Furthermore, the pumping device suitable for ultra-high performance concrete pumping also includes a safety protection system, which includes a detector for detecting whether the inspection door is open, and a controller connected to the detector; the detector is arranged on the hopper shell; the controller is also connected to the mixing station and the pumping system.

[0011] Furthermore, the mixing station and the pumping system constitute a group of unloading devices arranged in sequence in the upper and lower spaces, and the pumping device includes two groups of unloading devices, which are arranged at intervals along the width direction of the frame; the structures of the two hopper shells in the two groups of unloading devices are different, and the two hopper shells can be interchangeably installed in the two groups of unloading devices as needed.

[0012] Furthermore, the hopper also includes a scraper mechanism connected to the hopper shell, and the scraper mechanism is used to scrape the concrete in the hopper shell into its discharge port.

[0013] Furthermore, the scraper mechanism includes a driving rod group rotatably mounted on the hopper shell, a driving source connected to the driving rod group to drive the driving rod group to rotate, and a first scraper and a second scraper mounted at both ends of the driving rod group in the length direction; the first scraper and the second scraper are respectively located in the inner cavity of the hopper shell, so as to approach toward or move away from each other under the action of the driving rod group, so as to scrape the concrete in the hopper shell into its discharge port.

[0014] Furthermore, the driving rod group includes a first sliding rod and a second sliding rod respectively arranged on both sides of the open end of the hopper shell, and both ends of the first sliding rod and the second sliding rod are respectively rotatably penetrated on the hopper shell; the driving source includes a first driving motor connected to the first sliding rod to drive its rotation, and a second driving motor connected to the second sliding rod to drive its rotation; the first scraper and the second scraper are respectively penetrated on the first sliding rod and the second sliding rod at the same time, and the first scraper is also connected to the first sliding rod through a screw linkage structure, and the second scraper is also connected to the second sliding rod through a screw linkage structure.

[0015] Furthermore, the first scraper and the second scraper have the same structure, and their shapes match the cross-sectional shape of the inner cavity of the hopper shell.

[0016] Furthermore, the pumping system also includes a stirring device for stirring the concrete in the distribution valve box, and a pushing mechanism for pushing the stirred concrete outward; the stirring device and the pushing mechanism are respectively connected to the frame, and the stirring device is arranged in the distribution valve box, and the pushing mechanism is connected to the discharge end of the distribution valve box.

[0017] The utility model has the following beneficial effects:

[0018] The pumping device of the utility model adopts a sliding structure, that is, the rail car can be slidably supported on the track laid in the tunnel, so that the new pumping device can slide along the tunnel, thereby improving the on-site construction efficiency and reducing the required personnel configuration; the new device also adopts a special spatial layout method, that is, the mixing station and the pumping system are arranged in sequence in the upper and lower spaces, and the upper feed port of the pumping system is directly connected to the lower discharge port of the mixing station, thereby effectively shortening the pumping storage time, so that the concrete material can be transferred into the pumping system for pumping operation after the mixing is completed. Therefore, while meeting the requirements of the equipment's slurry preparation function and pumping function, its overall structure is simple and compact, which can effectively reduce the preparation cost and meet the needs of tunnel construction with narrow underground space.

[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 It is a schematic diagram of the main structure of a pumping device suitable for ultra-high performance concrete pumping in a preferred embodiment of the utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the spatial structure of the pumping system;

[0023] Figure 3 yes Figure 2 Schematic diagram of the spatial structure of the middle hopper;

[0024] Figure 4 yes Figure 3 Schematic diagram of the spatial structure of the middle hopper shell.

[0025] Legend:

[0026] 10. Railcar; 20. Frame; 30. Mixing station; 40. Pumping system; 41. Hopper; 411. Hopper shell; 412. Inspection door; 413. First scraper; 414. Second scraper; 415. First slide bar; 416. Second slide bar; 417. First drive motor; 418. Second drive motor; 42. Distribution valve box; 43. Stirring device; 44. Pushing mechanism. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0028] Reference Figure 1 The preferred embodiment of the utility model provides a pumping device suitable for ultra-high performance concrete pumping, comprising: a rail car 10 for sliding support on a track laid in a tunnel, a frame 20 fixedly mounted on the rail car 10, a mixing station 30 supported on the frame 20 for mixing concrete powder to prepare concrete, and a pumping system 40 supported on the frame 20 for pumping the prepared concrete. The pumping system 40 is arranged below the mixing station 30, and the upper feed port of the pumping system 40 is connected to the lower discharge port of the mixing station 30.

[0029] The pumping device of the utility model adopts a sliding structure, that is, the rail car 10 can be slidably supported on the track laid in the tunnel, so that the new pumping device can slide along the tunnel, thereby improving the on-site construction efficiency and reducing the required personnel configuration; the new device also adopts a special spatial layout method, that is, the mixing station 30 and the pumping system 40 are arranged in sequence in the upper and lower spaces, and the upper feed port of the pumping system 40 is directly connected to the lower discharge port of the mixing station 30, thereby effectively shortening the pumping storage time, so that the concrete material can be transferred into the pumping system 40 for pumping operation after the mixing is completed. Therefore, while meeting the requirements of the equipment's slurry preparation function and pumping function, its overall structure is simple and compact, which can effectively reduce the preparation cost and meet the needs of tunnel construction with narrow underground space.

[0030] Alternatively, if Figure 2 As shown, the pumping system 40 includes a hopper 41 and a distribution valve box 42 for distributing concrete pumping. The hopper 41 includes an open hopper shell 411, the hopper shell 411 and the distribution valve box 42 are arranged in the upper and lower spaces, and the upper opening of the hopper shell 411 is connected to the lower discharge port of the mixing station 30, and the lower contraction of the hopper shell 411 is connected to the distribution valve box 42. In this optional solution, since the hopper shell 411 is an open-type setting that expands outward, it can carry more concrete under the conditions of upper and lower height restrictions and horizontal installation space restrictions, reducing the risks of leakage and discontinuous pumping caused by the small hopper volume, and reducing the difficulty of manual cleaning and maintenance caused by overflow.

[0031] Preferably, if Figure 2 and 3As shown, the upper opening and the lower contraction of the hopper shell 411 are detachably connected to the mixing station 30 and the distribution valve box 42 respectively; since UHPC ultra-high performance concrete has a very high viscosity, the hopper shell 411 is detachably connected to the mixing station 30 and the distribution valve box 42, so that the hopper 41 can be easily disassembled for cleaning, which reduces the difficulty of cleaning, and is also convenient for replacing the hopper 41 with other sizes and models according to the actual construction conditions. Figure 4 As shown, a maintenance door 412 for maintenance is detachably connected to one of the side walls of the hopper shell 411, so as to facilitate cleaning and maintenance inside the hopper shell 411 without disassembling the hopper 41.

[0032] Preferably, the pumping device suitable for ultra-high performance concrete pumping also includes a safety protection system, which includes a detector for detecting whether the inspection door 412 is open, and a controller connected to the detector. The detector is arranged on the hopper shell 411. The controller is also connected to the mixing station 30 and the pumping system 40. During operation, the detector detects in real time whether the inspection door 412 is open. When the inspection door 412 is opened, the detector sends an opening signal to the controller, and the controller controls the mixing station 30 and the pumping system 40 to stop according to the signal, thereby effectively avoiding the risk of the operator being injured by the mixing system.

[0033] Optionally, the mixing station 30 and the pumping system 40 constitute a group of unloading devices arranged in sequence in the upper and lower spaces, and the pumping device includes two groups of unloading devices, and the two groups of unloading devices are arranged at intervals along the width direction of the frame 20. The structures of the two hopper shells 411 in the two groups of unloading devices are different, and the two hopper shells 411 can be interchangeably installed in the two groups of unloading devices as needed. In this optional scheme, the open hopper shell 411 is fixed to the distribution valve box 42 by fasteners and serves as an important frame for load bearing, while the two groups of unloading devices are arranged on the left and right, so that the two hopper shells 411 can be rotated according to actual needs, so as to realize flexible disassembly and assembly for multi-adaptive structural assembly, debugging and maintenance in a narrow space, realize opening maintenance on both sides of the equipment, and improve the adaptability of the new device to the environment.

[0034] Alternatively, if Figure 3 As shown, the hopper 41 also includes a scraper mechanism connected to the hopper shell 411, and the scraper mechanism is used to scrape the concrete in the hopper shell 411 into its discharge port. When working, the scraper mechanism can push the ultra-high performance concrete to the center of the hopper shell 411 during the pumping process to prevent the upper layer of concrete from solidifying due to non-flow, and can effectively scrape the concrete, reduce the risk of hopper 41 blockage, reduce personnel configuration, and improve the working safety of the device.

[0035] In this option, if Figure 3As shown, the scraper mechanism includes a driving rod group rotatably mounted on the hopper housing 411, a driving source connected to the driving rod group to drive the driving rod group to rotate, and a first scraper 413 and a second scraper 414 mounted at both ends of the driving rod group in the length direction. The first scraper 413 and the second scraper 414 are respectively located in the inner cavity of the hopper housing 411, so as to approach or move away from each other under the action of the driving rod group, so as to scrape the concrete in the hopper housing 411 into its discharge port.

[0036] In a specific embodiment of this optional solution, Figure 3 As shown, the driving rod group includes a first slide bar 415 and a second slide bar 416 respectively arranged on both sides of the open end of the hopper housing 411, and both ends of the first slide bar 415 and the second slide bar 416 are respectively rotatably penetrated on the hopper housing 411. The driving source includes a first driving motor 417 connected to the first slide bar 415 to drive the rotation thereof, and a second driving motor 418 connected to the second slide bar 416 to drive the rotation thereof. The first scraper 413 and the second scraper 414 are respectively and simultaneously penetrated on the first slide bar 415 and the second slide bar 416, and the first scraper 413 is also connected to the first slide bar 415 through a screw linkage structure, and the second scraper 414 is also connected to the second slide bar 416 through a screw linkage structure. When the first drive motor 417 and the second drive motor 418 rotate, they respectively drive the first slide bar 415 and the second slide bar 416 to rotate. When the first drive motor 417 rotates forward, the first scraper 413 matched with the first slide bar 415 moves to the right and scrapes the concrete. When the second drive motor 418 rotates forward, the second scraper 414 matched with the second slide bar 416 moves to the left and scrapes the concrete, thereby scraping the concrete toward the distribution valve box 42 to prevent the upper layer of concrete from solidifying due to non-flowing. The concrete can be effectively scraped off to reduce the risk of blockage of the hopper shell 411.

[0037] Preferably, if Figure 3 As shown, the first scraper 413 and the second scraper 414 have the same structure, and their shapes match the cross-sectional shape of the inner cavity of the hopper shell 411, so that when scraping concrete, the first scraper 413 and the second scraper 414 can fit tightly to the surface of the inner cavity of the hopper shell 411, thereby improving the concrete scraping effect.

[0038] Alternatively, if Figure 2 As shown, the pumping system 40 also includes a stirring device 43 for stirring the concrete in the distribution valve box 42, and a pushing mechanism 44 for pushing the stirred concrete outward. The stirring device 43 and the pushing mechanism 44 are respectively connected to the frame 20, and the stirring device 43 is arranged in the distribution valve box 42, and the pushing mechanism 44 is connected to the discharge end of the distribution valve box 42.

[0039] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pumping device suitable for ultra-high performance concrete pumping, characterized in that: include: A rail vehicle (10) for slidingly supporting on a track laid in a tunnel, a frame (20) fixedly mounted on the rail vehicle (10), a mixing station (30) supported on the frame (20) for mixing concrete powder to prepare concrete, and a pumping system (40) supported on the frame (20) for pumping the prepared concrete; The pumping system (40) is arranged below the mixing station (30), and the upper feed port of the pumping system (40) is connected to the lower discharge port of the mixing station (30).

2. The pumping device suitable for ultra-high performance concrete pumping according to claim 1 is characterized in that: The pumping system (40) includes a hopper (41) and a distribution valve box (42) for distributing concrete pumping; The hopper (41) comprises an open hopper shell (411), the hopper shell (411) and the distribution valve box (42) are arranged in an upper and lower space, and the upper opening of the hopper shell (411) is connected to the lower discharge port of the mixing station (30), and the lower contraction of the hopper shell (411) is connected to the distribution valve box (42).

3. The pumping device suitable for ultra-high performance concrete pumping according to claim 2 is characterized in that: The upper opening and the lower contraction of the hopper shell (411) are detachably connected to the mixing station (30) and the distribution valve box (42); An inspection door (412) for maintenance is detachably connected to one of the side walls of the hopper housing (411).

4. The pumping device suitable for ultra-high performance concrete pumping according to claim 3 is characterized in that: The pumping device suitable for ultra-high performance concrete pumping also includes a safety protection system, which includes a detector for detecting whether the inspection door (412) is opened, and a controller connected to the detector; The detector is arranged on the hopper housing (411); The controller is also connected to the mixing station (30) and the pumping system (40).

5. The pumping device suitable for ultra-high performance concrete pumping according to claim 3, characterized in that: The mixing station (30) and the pumping system (40) form a set of material discharge devices arranged in sequence in the upper and lower spaces, and the pumping device includes two sets of material discharge devices, and the two sets of material discharge devices are arranged at intervals along the width direction of the frame (20); The two hopper shells (411) in the two groups of material discharging devices have different structures, and the two hopper shells (411) can be interchangeably installed in the two groups of material discharging devices as required.

6. The pumping device suitable for ultra-high performance concrete pumping according to claim 2, characterized in that: The hopper (41) further comprises a scraper mechanism connected to the hopper shell (411), and the scraper mechanism is used to scrape the concrete in the hopper shell (411) into its discharge port.

7. The pumping device for ultra-high performance concrete pumping according to claim 6, characterized in that: The scraper mechanism comprises a driving rod group rotatably mounted on a hopper housing (411), a driving source connected to the driving rod group to drive the driving rod group to rotate, and a first scraper (413) and a second scraper (414) mounted at both ends of the driving rod group in the length direction. The first scraper (413) and the second scraper (414) are respectively located in the inner cavity of the hopper shell (411) so as to move towards or away from each other under the action of the driving rod group, so as to scrape the concrete in the hopper shell (411) into its discharge port.

8. The pumping device suitable for ultra-high performance concrete pumping according to claim 7, characterized in that: The driving rod group comprises a first sliding rod (415) and a second sliding rod (416) which are respectively arranged on both sides of the open end of the hopper shell (411); both ends of the first sliding rod (415) and the second sliding rod (416) are respectively rotatably arranged on the hopper shell (411); The driving source includes a first driving motor (417) connected to the first sliding rod (415) to drive the first sliding rod (415) to rotate, and a second driving motor (418) connected to the second sliding rod (416) to drive the second sliding rod (416) to rotate; The first scraper (413) and the second scraper (414) are respectively and simultaneously arranged on the first slide bar (415) and the second slide bar (416), and the first scraper (413) is also connected to the first slide bar (415) through a screw linkage structure, and the second scraper (414) is also connected to the second slide bar (416) through a screw linkage structure.

9. The pumping device suitable for ultra-high performance concrete pumping according to claim 7, characterized in that: The first scraper (413) and the second scraper (414) have the same structure, and their shapes match the cross-sectional shape of the inner cavity of the hopper shell (411).

10. The pumping device suitable for ultra-high performance concrete pumping according to claim 2, characterized in that: The pumping system (40) further comprises a stirring device (43) for stirring the concrete in the distribution valve box (42), and a pushing mechanism (44) for pushing the stirred concrete outwards; The stirring device (43) and the pushing mechanism (44) are respectively connected to the vehicle frame (20), and the stirring device (43) is arranged in the distribution valve box (42), and the pushing mechanism (44) is connected to the discharge end of the distribution valve box (42).

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