Composite pressurized spraying device for low-workability UHPC (Ultra High Performance Concrete)

Abstract

The invention discloses a composite pressurized spraying device for low-workability UHPC (Ultra High Performance Concrete), and relates to the technical field of pressurized spraying. The rear end of the spraying device is connected with a third pressurized pipe for increasing the concrete spraying strength; a kinetic energy conversion ring used for compressing air to generate pressure through rotating force generated when the stirring tank works is installed in the stirring tank, a pressure conversion box is installed in the kinetic energy conversion ring, and the lower end of the pressure conversion box is connected with a conversion rod for driving the pressure conversion box to work. A pressure storage tank is matched to realize pressure buffering, energy consumption is greatly reduced, a pressure detector and a switch valve are combined, pressure supporting time can be accurately calculated, release can be controlled, pressure waste is avoided, conveying blockage and sedimentation are avoided, continuous and stable feeding is guaranteed, power is strengthened layer by layer through the three-stage pressurization design, and the spraying strength can be flexibly adjusted; and different construction requirements of long distance, high fall and the like are met.

Description

Technical Field

[0001] This invention relates to the field of pressurized injection technology, specifically a composite pressurized injection device for low-operability UHPC. Background Technology

[0002] Ultra-high performance concrete (UHPC), as an advanced building material with ultra-high strength, high toughness and excellent durability, is increasingly widely used in engineering fields such as bridge reinforcement, tunnel lining and special structure construction. Low-workability UHPC has better mechanical properties and durability due to its extremely low water-cement ratio and optimized aggregate gradation, but it also has the characteristics of poor fluidity, high viscosity and strong thixotropy, which poses a severe challenge to traditional construction techniques.

[0003] When dealing with low-workability concrete (UHPC) with a low water-cement ratio and extremely low or even zero slump, common spraying devices often encounter problems such as arching and blockage of the thick, hard material in the hopper and pressure tank, leading to interruptions in material delivery. Furthermore, in long-distance conveying pipes, the frictional resistance between the material and the pipe wall is high, making it difficult to achieve stable delivery with a single power source. At the spray nozzle, the material is not sufficiently accelerated and atomized, resulting in a high rebound rate and insufficient density of the sprayed layer. In addition, most spraying devices rely on independent external pressurization equipment to provide spraying power, failing to recover and utilize the rotational kinetic energy of the mixing tank, resulting in power waste. To address these issues, we propose a composite pressurized spraying device for low-workability UHPC. Summary of the Invention

[0004] The purpose of this invention is to provide a composite pressurized injection device for low-operability UHPC.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a composite pressurized spraying device for low-workability UHPC, comprising a spraying device and a mixing tank connected to the rear end of the spraying device, a transfer tank for converting concrete is placed in front of the mixing tank, and the transfer tank and the mixing tank are connected by a pipeline, the lower end of the transfer tank is connected to the spraying device through a spraying transmission pipe, the upper end of the transfer tank is connected to a first pressurizing pipe for pressurizing the transfer tank, the rear end of the spraying transmission pipe is connected to a second pressurizing pipe for supplying pressure to the interior of the spraying transmission pipe to push the concrete to move, the rear end of the spraying device is connected to a third pressurizing pipe for increasing the concrete spraying force, a kinetic energy conversion ring for compressing air to generate pressure from the rotational force of the mixing tank during operation is installed inside the mixing tank, a pressure conversion box is installed inside the kinetic energy conversion ring, a conversion rod for driving the pressure conversion box is connected to the lower end of the pressure conversion box, an upper pusher and a lower pusher are installed inside the kinetic energy conversion ring for driving the conversion rod to move up and down, and a pressure storage tank for storing pressure is connected to the outside of the mixing tank.

[0006] As a further aspect of the present invention: the top wall of the mixing tank is connected to a drive motor for driving the mixing tank to stir, the lower end of the drive motor is connected to a stirring shaft, and the outer wall of the stirring shaft is connected to a connecting frame.

[0007] As a further embodiment of the present invention: the side of the connecting frame away from the stirring shaft is connected to the upper push frame, and the connecting frame is located below the kinetic energy conversion ring, and a conversion groove is provided at the lower end of the kinetic energy conversion ring.

[0008] As a further aspect of the present invention: the upper end of the connecting frame is connected to an arc-shaped rod for connecting with the lower push frame, and the upper end of the arc-shaped rod is connected to a fixing block, and the side of the fixing block away from the stirring shaft is rotatably connected to a rotating shaft for rotatably connecting with the lower push frame.

[0009] As a further aspect of the present invention: the upper end of the arc-shaped rod is connected to a range plate, and a lifting groove is provided on the side of the range plate near the lower push frame. An adjusting block for adjusting the angle of the lower push frame is slidably connected inside the lifting groove.

[0010] As a further aspect of the present invention: the side of the adjusting block near the lower push frame is rotatably connected to a rotating rod for rotatably connecting with the lower push frame, and the top wall of the lifting slide is connected to a lead screw for driving the adjusting block to move up and down along the lifting slide, and the lower end of the lead screw extends to the lower side of the arc-shaped rod.

[0011] As a further embodiment of the present invention: a conversion chamber is provided at the lower end of the pressure conversion box, a conversion piston is slidably connected inside the conversion chamber, and a lower extension block for rotatably connecting with the conversion rod is connected at the lower end of the conversion piston.

[0012] As a further aspect of the present invention: a telescopic mounting plate is connected to the side of the pressure conversion box away from the stirring shaft; a telescopic groove is formed on the side of the telescopic mounting plate away from the pressure conversion box; a telescopic plate is slidably connected to the inner wall of the telescopic groove; an upper locking block for limiting the position of the pressure conversion box is connected to the side of the telescopic plate away from the telescopic mounting plate; the telescopic plate is connected to the inner wall of the telescopic groove by a spring; an upper moving groove for installing the pressure conversion box is formed on the inner wall of the conversion groove; a push block groove for pushing the upper locking block to move into the telescopic groove is formed at the lower end of the upper moving groove; and a locking block groove for cooperating with the upper locking block to limit the position of the pressure conversion box is formed on the upper side of the upper moving groove.

[0013] As a further aspect of the present invention: the inner wall of the kinetic energy conversion ring is provided with a pressure transmission hole for conveying pressure, and the inner wall of the conversion groove is slidably connected with a baffle plate for sealing and blocking the pressure transmission hole, and the upper end of the baffle plate is connected to the top wall of the conversion groove through a reset spring.

[0014] Compared with the prior art, the beneficial effects of the present invention by adopting the above technical solution are as follows:

[0015] 1. This invention converts the rotational kinetic energy of the mixing tank into pressure energy through components such as a kinetic energy conversion coil and a pressure conversion box, eliminating the need for external pressurization equipment. Combined with a pressure storage tank, it achieves pressure buffering, significantly reducing energy consumption. The combination of a pressure detector and a switching valve allows for precise calculation of pressure support time and controlled release, preventing pressure waste. The transfer tank, with its three-stage pressurization design, sequentially achieves concrete pressing, pipeline pushing, and spraying enhancement, preventing transport blockages and sedimentation, ensuring continuous and stable material supply. The three-stage pressurization design enhances power layer by layer, allowing for flexible adjustment of spraying intensity to meet different construction needs such as long distances and high drops. The pressure stabilizing effect of the pressure storage tank makes the spraying pressure more stable, improving the adhesion effect and construction quality of the sprayed concrete.

[0016] 2. This invention enables the mixing assembly and the upper push frame to operate synchronously through the mixing shaft and connecting frame, realizing integrated operation of mixing and kinetic energy pressure generation. No additional power source is required, which greatly improves energy utilization and reduces equipment energy consumption and operating costs. The adjustment block is driven by the screw to move along the lifting slide, which drives the lower push frame to rotate around the rotating shaft. The lifting distance of the conversion rod can be flexibly adjusted, thereby accurately controlling the gas compression of the pressure conversion box and realizing on-demand adjustment of the output pressure to adapt to the pressurization requirements of different construction scenarios.

[0017] 3. This invention uses a conversion rod to drive a conversion piston to rise and fall within the conversion chamber, achieving efficient gas compression and output in conjunction with a one-way valve. The pressure transmission is continuous and stable, providing a reliable power source for system pressurization. The elastic locking structure of the upper locking block and the locking block slot, along with screw fixation, makes the pressure conversion box easy to install and disassemble. Unused pressure transmission holes are sealed by a baffle plate and a rubber plate to prevent pressure leakage and ensure pressure utilization efficiency. Multiple installation positions can be arranged within the conversion chamber, supporting the combined use of multiple pressure conversion boxes to meet different pressure requirements.

[0018] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0019] Figure 1 This is an overall three-dimensional schematic diagram of an embodiment of the present invention;

[0020] Figure 2 This is a three-dimensional schematic diagram of the mixing tank in an embodiment of the present invention;

[0021] Figure 3 This is a three-dimensional schematic diagram of the kinetic energy conversion coil in an embodiment of the present invention;

[0022] Figure 4 This is a three-dimensional schematic diagram of the conversion slot in an embodiment of the present invention;

[0023] Figure 5 for Figure 4 Enlarged diagram of A in the middle;

[0024] Figure 6 This is a three-dimensional schematic diagram of the pressure conversion box in an embodiment of the present invention;

[0025] Figure 7 This is a three-dimensional schematic diagram of the arc-shaped rod in an embodiment of the present invention;

[0026] Figure 8 This is a three-dimensional schematic diagram of the upper card block in an embodiment of the present invention;

[0027] Figure 9 This is a three-dimensional schematic diagram of the shielding plate in an embodiment of the present invention.

[0028] In the diagram: 1. Spraying device; 11. Mixing tank; 12. Spraying transmission pipe; 2. Transfer tank; 21. Kinetic energy conversion ring; 22. Pressure conversion box; 23. Conversion rod; 24. Upper push frame; 25. Lower push frame; 26. First pressurization pipe; 27. Second pressurization pipe; 28. Third pressurization pipe; 29. ​​Pressure storage tank; 3. Drive motor; 31. Mixing shaft; 32. Connecting frame; 33. Conversion groove; 4. Arc rod; 41. Fixing block; 42. Rotating shaft; 43. Range plate; 44. Lifting slide; 45. Adjusting block; 46. Lead screw; 47. Rotating rod; 5. Conversion chamber; 51. Lower extension block; 52. Conversion piston; 6. Telescopic mounting plate; 61. Telescopic plate; 62. Upper locking block; 63. Upper moving groove; 64. Push block groove; 65. Locking block groove; 7. Pressure transmission hole; 71. Baffle plate; 72. Return spring. Detailed Implementation

[0029] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0030] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Example 1

[0032] This invention discloses a composite pressurized spraying device for low-workability UHPC. In bridge reinforcement projects, it is necessary to repair and reinforce the damaged structure of old bridges. Due to its ultra-high strength, high toughness, and excellent durability, low-workability UHPC has become a core repair material. However, this material has an extremely low water-cement ratio, high viscosity, and poor flowability, making it difficult for traditional construction equipment to achieve precise delivery and uniform spraying. At this time, the composite pressurized spraying device for low-workability UHPC can enhance the power through a three-stage pressurization design, smoothly deliver the low-workability UHPC to the damaged part of the bridge and spray it efficiently. At the same time, the kinetic energy conversion mechanism recovers the rotational kinetic energy of the mixing tank and converts it into pressurization power. Combined with the pressure storage tank, pressure buffering and stable release are achieved to avoid blockage or sedimentation during material delivery. This ensures that the repair material is uniformly attached to the damaged area, quickly completes the bridge reinforcement work, and ensures the structural stability and traffic safety of the bridge.

[0033] Therefore, in order to effectively solve the above problems, this application proposes a composite pressurized injection device for low-operability UHPC, as shown in the attached drawings. Figure 1-9 As shown, the system includes a spraying device 1 and a mixing tank 11 connected to the rear end of the spraying device 1. A transfer tank 2 for transferring concrete is placed in front of the mixing tank 11, and the transfer tank 2 is connected to the mixing tank 11 via a pipe. The lower end of the transfer tank 2 is connected to the spraying device 1 via a spraying transmission pipe 12. The upper end of the transfer tank 2 is connected to a first pressurizing pipe 26 for pressurizing the transfer tank 2. The rear end of the spraying transmission pipe 12 is connected to a second pressurizing pipe 27 for supplying pressure to the interior of the spraying transmission pipe 12 to move the concrete. The rear end of the spraying device 1 is connected to... A third pressurization pipe 28 is connected to increase the concrete spraying force. The inside of the mixing tank 11 is a kinetic energy conversion ring 21 for compressing air to generate pressure from the rotational force of the mixing tank 11 during operation. The inside of the kinetic energy conversion ring 21 is a pressure conversion box 22. The lower end of the pressure conversion box 22 is connected to a conversion rod 23 for driving the pressure conversion box 22. The inside of the kinetic energy conversion ring 21 is an upper push frame 24 and a lower push frame 25 for driving the conversion rod 23 to move up and down. The outside of the mixing tank 11 is connected to a pressure storage tank 29 for storing pressure.

[0034] The first pressurizing pipe 26, the second pressurizing pipe 27, and the third pressurizing pipe 28 are all connected by a main pipe and two branch pipes. The main pipe and the two branch pipes are all equipped with one-way valves. The two branch pipes are respectively connected to the pressurizer and the pressure storage tank 29.

[0035] The pressure storage tank 29 is equipped with a pressure detector to detect the pressure change inside the pressure storage tank 29 and to check the pressure value required per minute by the pressurizer of the spraying device 1 when spraying concrete. This allows the pressure inside the pressure storage tank 29 to support the spraying time of the spraying device 1. The pressure storage tank 29 is also equipped with a switch valve to control the pressure release state inside the pressure storage tank 29.

[0036] When the mixing tank 11 is working, it drives the upper pusher 24 and the lower pusher 25 to rotate, thereby pushing the conversion rod 23 to rise and fall through the upper pusher 24 and the lower pusher 25. The rise and fall of the conversion rod 23 drives the pressure conversion box 22 to generate gas, generate pressure, and transmit the generated pressure to the inside of the pressure storage tank 29.

[0037] After the concrete is mixed in the mixing tank 11, it is transported to the interior of the transfer tank 2 through a pipeline. Then, pressure is transmitted into the interior of the transfer tank 2 through the pressurizer and the first pressurizing pipe 26, thereby changing the pressure inside the transfer tank 2 and pressing down on the concrete, so that the concrete is delivered into the interior of the spraying transmission pipe 12 more quickly. At this time, pressure is further applied into the interior of the spraying transmission pipe 12 through the pressurizer and the second pressurizing pipe 27, thereby pushing the concrete into the interior of the spraying device 1. Finally, pressure is transmitted into the interior of the spraying device 1 through the pressurizer and the third pressurizing pipe 28, thereby increasing the spraying force of the spraying device 1 when spraying concrete.

[0038] Example 2

[0039] The top wall of the mixing tank 11 is connected to a drive motor 3 for driving the mixing tank 11 to stir. The lower end of the drive motor 3 is connected to a stirring shaft 31, and the outer wall of the stirring shaft 31 is connected to a connecting frame 32.

[0040] The side of the connecting frame 32 away from the stirring shaft 31 is connected to the upper push frame 24, and the connecting frame 32 is located below the kinetic energy conversion ring 21. The lower end of the kinetic energy conversion ring 21 is provided with a conversion groove 33.

[0041] The upper end of the connecting frame 32 is connected to an arc-shaped rod 4 for connecting with the lower push frame 25, and the upper end of the arc-shaped rod 4 is connected to a fixing block 41. The side of the fixing block 41 away from the stirring shaft 31 is rotatably connected to a rotating shaft 42 for rotatably connecting with the lower push frame 25.

[0042] The upper end of the arc rod 4 is connected to a range plate 43. The range plate 43 is provided with a lifting slide 44 on the side near the lower push frame 25. An adjusting block 45 for adjusting the angle of the lower push frame 25 is slidably connected inside the lifting slide 44.

[0043] The adjusting block 45 is rotatably connected to the side of the lower push frame 25 with a rotating rod 47 for rotatably connecting with the lower push frame 25. The top wall of the lifting slide 44 is connected to a lead screw 46 for driving the adjusting block 45 to move up and down along the lifting slide 44, and the lower end of the lead screw 46 extends to the lower side of the arc-shaped rod 4.

[0044] Specifically, when it is necessary to rotate the upper push frame 24, the drive motor 3 is started, and the drive motor 3 drives the stirring shaft 31 to rotate. At this time, the rotation of the stirring shaft 31 will drive the connecting frame 32 and the upper push frame 24 to rotate along the stirring shaft 31.

[0045] When it is necessary to adjust the lifting range of the conversion lever 23, the lead screw 46 can be rotated. The rotation of the lead screw 46 causes the adjusting block 45 to rise or fall. At this time, the rotation of the adjusting block 45 will drive the lower push frame 25 to rise or fall through the rotating rod 47. However, due to the rotation of the shaft 42, the lower push frame 25 is caused to rotate around the shaft 42 as the center, thereby adjusting the distance by which the lower push frame 25 pushes the conversion lever 23 down, thus completing the adjustment of the lifting range of the conversion lever 23.

[0046] Example 3

[0047] The lower end of the pressure conversion box 22 is provided with a conversion chamber 5, and a conversion piston 52 is slidably connected inside the conversion chamber 5. The lower end of the conversion piston 52 is connected with a lower extension block 51 for rotatably connecting with the conversion rod 23.

[0048] A telescopic mounting plate 6 is connected to the side of the pressure conversion box 22 away from the stirring shaft 31. A telescopic groove is opened on the side of the telescopic mounting plate 6 away from the pressure conversion box 22. A telescopic plate 61 is slidably connected to the inner wall of the telescopic groove. An upper locking block 62 for limiting the position of the pressure conversion box 22 is connected to the side of the telescopic plate 61 away from the telescopic mounting plate 6. The telescopic plate 61 is connected to the inner wall of the telescopic groove by a spring. An upper moving groove 63 for installing the pressure conversion box 22 is opened on the inner wall of the conversion groove 33. A push block groove 64 for pushing the upper locking block 62 to move into the telescopic groove is opened at the lower end of the upper moving groove 63. A locking block groove 65 for cooperating with the upper locking block 62 to limit the position of the pressure conversion box 22 is opened on the upper side of the upper moving groove 63.

[0049] The inner wall of the kinetic energy conversion ring 21 is provided with a pressure transmission hole 7 for conveying pressure, and the inner wall of the conversion groove 33 is slidably connected with a baffle plate 71 for sealing and blocking the pressure transmission hole 7. The upper end of the baffle plate 71 is connected to the top wall of the conversion groove 33 through a return spring 72.

[0050] Furthermore, the pressure conversion box 22 is provided with an output port and an air inlet port, and a one-way valve is installed inside both the output port and the air inlet port.

[0051] Furthermore, the inner wall of the upper moving groove 63 is slidably connected to the lifting extrusion block, and the lower end of the lifting extrusion block is rotatably connected to the threaded rod. The threaded rod passes through the kinetic energy conversion ring 21 and extends to the lower side of the kinetic energy conversion ring 21. At the same time, the kinetic energy conversion ring 21 is spirally connected to the outer wall of the threaded rod. When the screw rod is rotated, the lifting extrusion block will move up and down, thereby pressing and fixing the position of the pressure conversion box 22.

[0052] When the conversion rod 23 is raised and lowered, the raising and lowering of the conversion rod 23 will drive the lower extension block 51 and the conversion piston 52 to rise and fall inside the conversion chamber 5. At this time, the conversion piston 52 will squeeze the air pressure inside the pressure conversion box 22, thereby generating pressure and transmitting the pressure through the output hole to the inside of the pressure storage tank 29.

[0053] Meanwhile, the conversion slot 33 has multiple upward sliding slots 63, push block slots 64, and locking block slots 65 inside. When the pressure conversion box 22 needs to be installed in the set position, the upper locking block 62 connected to the pressure conversion box 22 is aligned with the upward sliding slot 63, and the pressure conversion box 22 is pushed upward. At this time, the upper locking block 62 will contact the push block slot 64, thereby pushing the upper locking block 62 and the telescopic plate 61 in the opposite direction to move into the telescopic mounting plate 6. When the upper locking block 62 has completely moved into the upper sliding slot 63, the spring will retract the telescopic plate 61 and the upper locking block 62 from the inside of the telescopic mounting plate 6. Then, moving upward again will insert the upper locking block 62 into the locking block slot 65. Finally, the position of the pressure conversion box 22 is fixed by screws.

[0054] At the same time, when the pressure conversion box 22 is installed, it can push the baffle plate 71 to move upward, thereby opening the pressure transmission hole 7, and installing the gas transmission pipe in the pressure conversion box 22 into the inside of the pressure transmission hole 7. At this time, the pressure can be transmitted to the inside of the pressure storage tank 29 through the pressure transmission hole 7.

[0055] Meanwhile, the pressure transmission port 7 without pressure conversion box 22 will be blocked by the baffle plate 71. At the same time, a rubber plate is installed on the side of the baffle plate 71 near the pressure transmission port 7 to seal the pressure transmission port 7.

[0056] Furthermore, the inner wall of the conversion groove 33 can also be provided with a limiting groove for limiting the moving direction of the baffle 71, and a protrusion is installed on one side of the baffle 71, and then the protrusion extends into the interior of the limiting groove.

[0057] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0058] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0059] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0060] For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A composite pressurized injection device for low-operability UHPC, comprising an injection device (1) and a mixing tank (11) connected to the rear end of the injection device (1), characterized in that: A transfer tank (2) for transferring concrete is placed in front of the mixing tank (11), and the transfer tank (2) is connected to the mixing tank (11) through a pipe. The lower end of the transfer tank (2) is connected to the spraying device (1) through a spraying transmission pipe (12). The upper end of the transfer tank (2) is connected to a first pressurizing pipe (26) for pressurizing the transfer tank (2). The rear end of the spraying transmission pipe (12) is connected to a second pressurizing pipe (27) for conveying pressure into the spraying transmission pipe (12) to push the concrete to move. The rear end of the spraying device (1) is connected to a second pressurizing pipe (27) for increasing the concrete spraying force. The three pressurization pipes (28) are installed inside the mixing tank (11) to compress air and generate pressure by the rotational force of the mixing tank (11) during operation. The pressure conversion box (22) is installed inside the kinetic energy conversion ring (21). The lower end of the pressure conversion box (22) is connected to the conversion rod (23) that drives the pressure conversion box (22) to work. The upper push frame (24) and the lower push frame (25) for driving the conversion rod (23) to move up and down are installed inside the kinetic energy conversion ring (21). The outside of the mixing tank (11) is connected to the pressure storage tank (29) for storing pressure.

2. The composite pressurized injection device for low-operability UHPC according to claim 1, characterized in that: The top wall of the mixing tank (11) is connected to a drive motor (3) for driving the mixing tank (11) to stir. The lower end of the drive motor (3) is connected to a stirring shaft (31), and the outer wall of the stirring shaft (31) is connected to a connecting frame (32).

3. A composite pressurized injection device for low-operability UHPC according to claim 2, characterized in that: The connecting frame (32) is connected to the upper push frame (24) on the side away from the stirring shaft (31), and the connecting frame (32) is located below the kinetic energy conversion ring (21). The lower end of the kinetic energy conversion ring (21) is provided with a conversion groove (33).

4. A composite pressurized injection device for low-operability UHPC according to claim 3, characterized in that: The upper end of the connecting frame (32) is connected to an arc-shaped rod (4) for connecting with the lower push frame (25), and the upper end of the arc-shaped rod (4) is connected to a fixing block (41). The side of the fixing block (41) away from the stirring shaft (31) is rotatably connected to a rotating shaft (42) for rotatably connecting with the lower push frame (25).

5. A composite pressurized injection device for low-operability UHPC according to claim 4, characterized in that: The upper end of the arc-shaped rod (4) is connected to a range plate (43). The range plate (43) has a lifting groove (44) on the side near the lower push frame (25). The lifting groove (44) is slidably connected to an adjusting block (45) for adjusting the angle of the lower push frame (25).

6. A composite pressurized injection device for low-operability UHPC according to claim 5, characterized in that: The adjusting block (45) is rotatably connected to a rotating rod (47) for rotatably connecting to the lower push frame (25) on the side near the lower push frame (25). The top wall of the lifting slide (44) is connected to a lead screw (46) for driving the adjusting block (45) to move up and down along the lifting slide (44), and the lower end of the lead screw (46) extends to the lower side of the arc rod (4).

7. A composite pressurized injection device for low-operability UHPC according to claim 1, characterized in that: The pressure conversion box (22) has a conversion chamber (5) at its lower end. A conversion piston (52) is slidably connected inside the conversion chamber (5). The lower end of the conversion piston (52) is connected to a lower extension block (51) for rotatably connecting with the conversion rod (23).

8. A composite pressurized injection device for low-operability UHPC according to claim 3, characterized in that: The pressure conversion box (22) is connected to a telescopic mounting plate (6) on the side away from the stirring shaft (31). The telescopic mounting plate (6) is provided with a telescopic groove on the side away from the pressure conversion box (22). The inner wall of the telescopic groove is slidably connected to a telescopic plate (61). The side of the telescopic plate (61) away from the telescopic mounting plate (6) is connected to an upper locking block (62) for limiting the position of the pressure conversion box (22). The telescopic plate (61) is connected to the inner wall of the telescopic groove by a spring. The inner wall of the conversion groove (33) is provided with an upper moving groove (63) for installing the pressure conversion box (22). The lower end of the upper moving groove (63) is provided with a push block groove (64) for pushing the upper locking block (62) to move into the telescopic groove. The upper side of the upper moving groove (63) is provided with a locking block groove (65) for cooperating with the upper locking block (62) to limit the position of the pressure conversion box (22).

9. A composite pressurized injection device for low-operability UHPC according to claim 3, characterized in that: The inner wall of the kinetic energy conversion ring (21) is provided with a pressure transmission hole (7) for conveying pressure. The inner wall of the conversion groove (33) is slidably connected with a baffle plate (71) for sealing and blocking the pressure transmission hole (7). The upper end of the baffle plate (71) is connected to the top wall of the conversion groove (33) through a reset spring (72).

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