A pneumatic grouting device with sealing replacement function

Abstract

The novel discloses a kind of pneumatic grouting devices with sealing replacement function, it is related to grouting equipment field, technical scheme is, the upper portion of including frame is provided with drive assembly, drive assembly is used to drive grouting unit work;It is also provided with plugging agent perfusion pump on frame, plugging agent perfusion pump and the liquid outlet of grouting unit are respectively communicated mixing valve by pipeline, the outlet end of mixing valve is provided with mixing pipe, and the outlet end of mixing pipe is provided with grouting pipe;Counter is also provided on frame, and counter and drive assembly form pneumatic circuit;The frame on plugging agent perfusion pump side is provided with booster assembly, and booster assembly is used to provide high-pressure gas to drive assembly and plugging agent perfusion pump when external gas source pressure is insufficient.The beneficial effects of the novel are: the pneumatic circuit formed by pneumatic counter and drive assembly can be accurately set grouting times according to construction demand in advance, and effectively avoid the excessive waste or grouting deficiency of slurry.

Description

Technical Field

[0001] This invention relates to the field of grouting equipment, and in particular to a pneumatic grouting device with a sealing and replacement function. Background Technology

[0002] Anchoring agent pumping technology is widely used in fields such as mine support and tunnel construction. Its core is to mix materials such as resin and catalyst in a certain proportion and then inject them into the anchor bolt hole to form a high-strength anchor body.

[0003] Existing equipment typically uses a single-pump structure, which makes it difficult to accurately control the mixing ratio of two-component materials. The mixing valve design is simple, but the materials are not mixed evenly, and local unreacted areas are prone to appear, reducing the anchoring strength.

[0004] The existing equipment lacks precise quantitative control functions and mainly relies on the operator's experience and judgment to start and stop the equipment. This can easily lead to excessive grouting, resulting in material waste, or insufficient grouting, affecting the anchoring strength and uniformity of quality, and posing potential risks to project safety.

[0005] Meanwhile, if the grouting operation is interrupted or completed for any reason, the grout remaining in the mixing valve and mixing pipe will solidify rapidly, causing serious pipeline blockage. The blocked parts cannot be reused, and the reinstallation work is extremely cumbersome, requiring a lot of manpower and wasting resources. Utility Model Content

[0006] To address the aforementioned technical problems, this invention provides a pneumatic grouting device with a sealing and replacement function.

[0007] The technical solution is that a driving component is provided on the upper part of the frame, and the driving component is used to drive the grouting unit to work. A sealing agent injection pump is also provided on the frame. The outlet ends of the sealing agent injection pump and the grouting unit are respectively connected to a mixing valve through pipelines. A mixing pipe is provided at the outlet end of the mixing valve, and a grouting pipe is provided at the outlet end of the mixing pipe. A counter is also provided on the frame. The counter is a pneumatic counter, and the counter and the drive component form a pneumatic circuit. A pressurization assembly is provided on the frame located on one side of the plugging agent injection pump. The pressurization assembly is used to provide high-pressure gas to the drive assembly and the plugging agent injection pump when the external gas source pressure is insufficient.

[0008] Preferably, the drive assembly includes a pneumatic motor fixedly mounted on the frame, the output shaft of the pneumatic motor being a plunger rod that reciprocates linearly along the axial direction, and the end of the plunger rod being fixedly connected to the piston of the grouting unit; The air inlet of the pneumatic motor is connected to an air source through an air inlet pipe, and an air control valve and an oil injector are installed on the air inlet pipe.

[0009] Preferably, the grouting unit includes two large-capacity grouting pumps and one small-capacity grouting pump, with the small-capacity grouting pump located between the two large-capacity grouting pumps. The pump bodies of the large-capacity grouting pumps and the small-capacity grouting pumps are fixed to the frame by mounting brackets, and the piston rods of the large-capacity grouting pumps and the small-capacity grouting pumps are fixed by adapter plates. The adapter plate is fixedly connected to the output end of the pneumatic motor, and the pneumatic motor drives the piston rods of the large-capacity grouting pump and the small-capacity grouting pump to reciprocate.

[0010] Preferably, the areas of the two large-capacity grouting pump pistons are equal and twice the area of ​​the small-capacity grouting pump piston; When one of the two large-capacity grouting pumps is connected to the resin silo and the other is connected to the catalyst silo, the mixing ratio of resin and catalyst is 1:1. When two large-capacity grouting pumps are connected to the resin silo, and the inlet end of the small-capacity grouting pump is connected to the catalyst silo through the feed pipe, the mixing ratio of resin to catalyst is 4:1. The outlet ends of the two large-capacity grouting pumps and the small-capacity grouting pump are connected to a mixing valve via hoses. The outlet end of the mixing valve is connected to a mixing pipe, and the outlet end of the mixing pipe is equipped with a grouting pipe.

[0011] Preferably, the sealing agent injection pump includes a pump body located on one side of the grouting unit. The pump body is a pneumatic plunger pump. The outlet end of the pneumatic plunger pump is connected to a mixing valve via a hose. The outlet end of the mixing valve is connected to a mixing pipe. The outlet end of the mixing pipe is provided with a grouting pipe.

[0012] Preferably, the pressurization assembly includes an air storage tank and a booster pump disposed on the frame, wherein the air inlet of the air storage tank is connected to the air outlet of the booster pump through a pipe, and the air storage tank is provided with an air outlet. The outlet end of the gas storage tank is equipped with a tee valve. One port of the tee valve is connected to the gas outlet end of the gas storage tank, and the other two ports are connected to the air inlet ends of the pneumatic motors of the grouting pump and the sealing pump, respectively.

[0013] Preferably, a stirring core is provided inside the mixing tube.

[0014] The beneficial effects of the technical solution provided by this novel embodiment are: 1. Achieves switching between 1:1 and 4:1 mixing ratios through piston area difference, meeting the stringent requirements for material proportions in different construction scenarios such as reinforcement, filling, and sealing; 2. The pneumatic circuit formed by the pneumatic counter and the drive component allows for precise pre-setting of the number of grouting operations according to construction requirements, effectively avoiding excessive waste of grout or insufficient grouting, and ensuring the consistency and reliability of construction quality. 3. Adopting a dual gas supply mode of "priority to on-site gas source and backup to booster components" ensures that the drive components and sealing agent pumps can obtain stable and high-pressure power; 4. An independent sealing agent injection pump can pump the sealing agent into the mixing valve and mixing pipe after grouting is completed, so as to thoroughly flush and replace the residual grout. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this novel embodiment.

[0016] Figure 2 This is a schematic diagram of the pneumatic motor and grouting unit of this novel embodiment.

[0017] Figure 3 This is a schematic diagram of the sealing agent injection pump and pressurization assembly of this novel embodiment.

[0018] The attached figures are labeled as follows: 1. Frame; 2. Drive assembly; 3. Grouting unit; 4. Sealing agent injection pump; 5. Counter; 6. Pressure boosting assembly; 7. Pneumatic motor; 8. Pneumatic control valve; 9. Oil injector; 10. Large-capacity grouting pump; 11. Small-capacity grouting pump; 12. Mounting bracket; 13. Adapter plate; 14. Air storage tank; 15. Pressure boosting pump. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] It should be noted that, without conflict, the embodiments and features in the embodiments of this invention can be combined with each other.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1 See Figures 1 to 3 The present invention provides a pneumatic grouting device with sealing and replacement function, including a frame 1, and a drive assembly 2 is provided on the upper part of the frame 1. The drive assembly 2 is used to drive the grouting unit 3 to work. A sealing agent injection pump 4 is also installed on the frame 1. The outlet ends of the sealing agent injection pump 4 and the grouting unit 3 are respectively connected to the mixing valve through pipelines. A mixing pipe is installed at the outlet end of the mixing valve, and a grouting pipe is installed at the outlet end of the mixing pipe. A counter 5 is also installed on the frame 1. The counter 5 is a pneumatic counter 5, and the counter 5 and the drive component 2 form a pneumatic circuit. By using pneumatic technology to replace electricity for signal acquisition and counting, it can meet the needs of various environments where electricity is prohibited.

[0024] The counter 5 is equipped with a counting port (Z port), a reset port (Y port), a compressed air inlet (P port), and an output signal port (A port). To ensure a stable air supply, the P port is connected to the main air source, the Z port is connected to the air inlet of the pneumatic motor 7, the A port is connected to the control port of the pneumatic control valve 8, and the Y port is connected to the working port of the reset valve (if the manual reset is used on the front of the counter 5, it can be left unconnected and connected to an M5 plug or a silencer). When using counter 5, the required number of cycles (i.e. the number of times the pneumatic motor works) can be set by using the preset button on the front of counter 5. The counter 5 is connected to a constant pressure (0.2-0.8 MPa) from the main air source via port P on the back. When port Z on the back of counter 5 receives an air pressure greater than 0.08 MPa for more than 10 ms, it marks the start of the counting cycle. When the air pressure at port Z is lower than 0.015 MPa for more than 12 ms, it marks the midpoint of the counting cycle. When port Z receives an air pressure greater than 0.08 MPa for more than 10 ms, it marks the end of the counting cycle. At the same time, the unit gear of the gear set inside counter 5 rotates one revolution, and the display on the front of counter 5 decreases by one number, ending the first counting cycle.

[0025] For example, in a specific grouting operation scenario, when grouting is required to stop after 100 grouting operations, the corresponding value can be set on counter 5 to 100. During the operation of the grouting pump, when the pneumatic motor 7 performs one reciprocating motion, the piston rod of the pneumatic motor 7 is fixedly connected to the piston rods of the large-capacity grouting pump 10 and the small-capacity grouting pump 11 through the adapter plate 13, thereby driving the piston rods of the large-capacity grouting pump 10 and the small-capacity grouting pump 11 to reciprocate, driving the grouting unit 3 to work, thus realizing one grouting operation. At this time, the display screen on the front of counter 5 decreases by one number.

[0026] Similarly, when the set count value is reached, the number on the display screen changes to "00000". Port A on the back of counter 5 outputs a gas signal to the control port of pneumatic control valve 8, which cuts off the air intake, ending the first preset counting cycle.

[0027] As the grouting operation continues, the number of counter 5 decreases continuously. When the number displayed by counter 5 reaches zero, it indicates that 100 grouting operations have been completed. At this time, the grouting pump will automatically stop working, ensuring the accuracy and controllability of the grouting operation and avoiding over-grouting or under-grouting, thus providing reliable technical support for coal mine anchoring operations.

[0028] The quantitative grouting operation of the grouting pump is realized by the counter 5. In the anchoring operation of coal mine, on the one hand, it can save grout material, and on the other hand, it can avoid the difference in anchoring strength caused by unstable grouting volume, reduce the safety risks caused by insufficient or excessive grouting, and make the anchoring effect more predictable and reliable.

[0029] Press the reset button on the front of counter 5, or provide an air pressure (0.2-0.8MPa) signal to the Y port on the back of counter 5 through a button valve, and the display on the front of counter 5 will return to the initially set count value, entering the next counting cycle.

[0030] By setting different counting values ​​on counter 5, the needs of grouting operations of various scales can be flexibly met, the grouting volume can be precisely controlled, and the operators can adjust the grouting plan at any time according to the project progress and actual needs, so as to achieve the best anchoring effect.

[0031] For example, in the anchoring operation of a coal mine roadway, for a roadway that is 100 meters long, 5 meters wide, and 4 meters high, geological surveys determine that a specific amount of anchoring agent needs to be injected into each cubic meter of rock mass. Through calculation and testing, the grouting volume for each injection is determined to be X liters. Since the grouting pump injects a constant amount of grout each time, it is calculated that the grouting pump operates N times per injection. Then, a corresponding count value (N) is set on counter 5 so that the grouting pump can operate accurately according to the preset grouting volume. When counter 5 reaches the set value, the grouting pump automatically stops, ensuring that the anchoring effect of the entire roadway is uniform and reliable, and avoiding safety hazards caused by insufficient or excessive grouting.

[0032] A pressurization assembly 6 is installed on the frame 1 located on one side of the plugging agent injection pump 4. The pressurization assembly 6 is used to provide high-pressure gas to the drive assembly 2 and the plugging agent injection pump 4 when the external gas source pressure is insufficient.

[0033] First, connect the drive assembly 2 and the sealing agent injection pump 4 to the on-site gas source and check the pressure with a pressure gauge; if the on-site gas source pressure is insufficient, start the booster assembly 6. With the booster assembly 6 and the on-site gas source combined, gas is supplied to ensure that the drive assembly 2 and the sealing agent injection pump 4 obtain stable high-pressure gas. Frame 1 is fixed in a suitable construction position. According to the required grouting volume, the grouting quota is set by adjusting the preset parameters of pneumatic counter 5. Drive component 2 is started, and grouting unit 3 starts to work. The grout output by grouting unit 3 is transported to mixing valve through pipeline. Mixing valve guides grout to mixing pipe. After being buffered and stabilized by mixing pipe, it is transported to grouting operation point by grouting pipe. At the same time, pneumatic counter 5 monitors the operating status of drive component 2 in real time. When the grouting volume reaches the preset quota, counter 5 triggers drive component 2 to stop working through pneumatic circuit, thus completing quantitative grouting.

[0034] After grouting is completed, the sealing agent injection pump 4 is started. The sealing agent enters the mixing valve and mixing pipe through the pipeline to flush and replace the residual grout in the above pipeline. The replaced residual grout is discharged together with the sealing agent to achieve the sealing and cleaning of the pipeline and prevent the residual grout from solidifying and clogging the pipeline.

[0035] The pneumatic circuit formed by the pneumatic counter 5 and the drive component 2 can accurately set and control the grouting volume according to construction needs, effectively avoiding excessive waste of grout or insufficient grout affecting construction quality; the sealing agent injection pump 4, together with the mixing valve and pipeline, realizes the sealing replacement function, which can thoroughly remove residual grout in the pipeline, prevent pipeline blockage, extend the service life of the equipment, and at the same time reduce the workload of manual disassembly and sealing, and improve maintenance efficiency.

[0036] The drive assembly 2 includes a pneumatic motor 7 fixedly mounted on the frame 1. The output shaft of the pneumatic motor 7 is a plunger rod, which performs reciprocating linear motion along the axial direction. The end of the plunger rod is fixedly connected to the piston of the grouting unit 3. The specific structure of the pneumatic motor 7 is existing technology and will not be described in detail here. The output end of the pneumatic motor 7 is fixedly connected to the piston rod of the grouting unit 3 through the adapter plate 13, and drives the grouting unit 3 to work by connecting to the pressurization assembly 6 or the on-site air source. The air inlet of the pneumatic motor 7 is connected to the air source through the air inlet pipe, and the air control valve 8 and the oil injector 9 are installed on the air inlet pipe.

[0037] When the equipment is started, compressed air enters the pneumatic motor 7 through the air inlet pipe. Driven by the compressed air, the pneumatic motor 7 drives the plunger rod to reciprocate linearly along the axis. When the plunger rod extends, it pushes the piston of the grouting unit 3 downward to complete the grout discharge action. The grout is then transported to the mixing valve through the pipeline. When the piston rod retracts, it drives the piston of the grouting unit 3 upward to complete the grout suction action and replenish the grout.

[0038] The pneumatic counter 5 synchronously monitors the number of reciprocations of the pneumatic motor 7. When the preset value is reached, the counter 5 triggers the pneumatic control valve 8 to close through the pneumatic circuit, cutting off the air supply, and the pneumatic motor 7 stops working, thus terminating the grouting operation.

[0039] The pneumatic control valve 8 is a normally open pneumatic control valve. After receiving the signal from the counter 5, it closes the air circuit. When the preset grouting volume is reached, the pneumatic control valve 8 can quickly cut off the air source to avoid excessive or insufficient grouting. It is especially suitable for scenarios with high grouting accuracy requirements.

[0040] The lubricator 9 continuously delivers lubricating oil to the reciprocating parts of the pneumatic motor 7, such as the piston and cylinder contact surface, along with compressed air. This reduces component wear, lowers the probability of failure, extends equipment life, and reduces the maintenance cost of regular manual lubrication.

[0041] Grouting unit 3 includes two large-capacity grouting pumps 10 and one small-capacity grouting pump 11. The small-capacity grouting pump 11 is located between the two large-capacity grouting pumps 10. The pump bodies of the large-capacity grouting pump 10 and the small-capacity grouting pump 11 are fixed on the frame 1 by the mounting bracket 12. The piston rods of the large-capacity grouting pump 10 and the small-capacity grouting pump 11 are fixed by the adapter plate 13. Grouting unit 3 has multiple grouting pumps of different capacities, and the grouting mode can be selected according to construction needs, adapting to different material requirements and meeting different occasions such as reinforcement, filling, and sealing. The adapter plate 13 is fixedly connected to the output end of the pneumatic motor 7, and the pneumatic motor 7 drives the piston rods of the large-capacity grouting pump 10 and the small-capacity grouting pump 11 to move back and forth.

[0042] The adapter plate 13 synchronously transmits the power of the pneumatic motor 7 to the piston rods of the three pumps, ensuring that their reciprocating motion is completely synchronized. The pump body is uniformly fixed to the frame 1 through the mounting bracket 12, and the piston rods are centrally driven through the adapter plate 13, reducing the vibration and displacement of the distributed structure and improving the overall stability of the equipment. The simplified transmission link reduces the probability of mechanical failure.

[0043] The pistons of the two large-capacity grouting pumps 10 have equal areas and are twice the area of ​​the piston of the small-capacity grouting pump 11. When one of the two large-capacity grouting pumps 10 is connected to the resin silo and the other is connected to the catalyst silo, the mixing ratio of resin and catalyst is 1:1. When two large-capacity grouting pumps 10 are connected to the resin silo, and the inlet end of the small-capacity grouting pump 11 is connected to the catalyst silo through the feed pipe, the mixing ratio of resin to catalyst is 4:1. The outlet ends of the two large-capacity grouting pumps 10 and the small-capacity grouting pump 11 are connected to a mixing valve via hoses. The outlet end of the mixing valve is connected to a mixing pipe, and a grouting pipe is installed at the outlet end of the mixing pipe.

[0044] By designing a large-capacity grouting pump with a piston area twice that of a small-capacity pump, and with the two large-capacity pumps working in tandem, the resin and catalyst output ratio is kept stable at 4:1. Precise mixing can be achieved without additional adjustment devices, ensuring the reaction efficiency and curing effect of the mixed grout, and avoiding problems such as insufficient grouting strength or poor curing caused by ratio deviation.

[0045] The sealing agent injection pump 4 includes a pump body located on one side of the grouting unit 3. The pump body is a pneumatic plunger pump. The outlet end of the pneumatic plunger pump is connected to a mixing valve through a hose. The outlet end of the mixing valve is connected to a mixing pipe. The outlet end of the mixing pipe is provided with a grouting pipe.

[0046] The booster assembly 6 includes an air storage tank 14 and a booster pump 15 mounted on the frame 1. The air inlet of the air storage tank 14 is connected to the air outlet of the booster pump 15 via a pipe, and the air storage tank 14 is provided with an air outlet. The outlet end of the gas storage tank 14 is equipped with a tee with a valve. One port of the tee is connected to the gas outlet end of the gas storage tank 14, and the other two ports are connected to the air inlet ends of the pneumatic motors of the grouting pump and the sealing pump, respectively.

[0047] Prioritize connecting the pneumatic motor 7 and pneumatic plunger pump to the on-site air source and check the pressure using a pressure gauge; if the on-site air source pressure is lower than the equipment's working threshold, start the booster pump 15 and deliver compressed air to the air storage tank 14 through the pipeline. Once the pressure in the air storage tank 14 reaches the preset value, the booster pump 15 will automatically shut down, relying on the air storage tank 14 to stabilize the pressure. Preset valve control logic: Based on construction requirements, grouting is performed first, followed by sealing. The switching sequence of the three-way valve is clearly defined: during grouting, the valve connected to the pneumatic motor 7 needs to be opened, and during sealing, the valve connected to the pneumatic sealing pump needs to be opened. Open the valve connecting the three-way valve to the pneumatic motor 7. The high-pressure gas in the air tank 14 enters the pneumatic motor 7, which drives the piston rod of the grouting unit 3 to reciprocate, completing the grout suction and discharge. At this time, the valve connecting the three-way valve to the pneumatic plugging pump remains closed, and the plugging agent injection pump 4 is in standby mode.

[0048] After grouting is completed, close the valve connecting the three-way pneumatic motor 7 and open the valve connecting the pneumatic plugging pump. High-pressure gas drives the pneumatic plugging pump to work and output the plugging agent to the mixing valve and mixing pipe to complete the plugging. Based on the logic of "priority of on-site gas source + pressure supplementation by booster component 6", and with the centralized control of three-way valve, it can quickly deal with the problem of unstable on-site gas source - without disassembling pipelines, power supply can be achieved by starting and stopping booster pump 15 and switching valves. It is especially suitable for construction scenarios without stable gas source, such as in the field and underground, and avoids delays in construction period due to gas source problems.

[0049] A stirring core is installed inside the mixing tube. The stirring core can fully mix the slurry, resulting in a good thixotropic effect.

[0050] When using this new technology, the drive assembly 2 and the sealing agent injection pump 4 are first connected to the on-site gas source, and the pressure is detected by a pressure gauge; if the on-site gas source pressure is insufficient, the booster assembly 6 is switched to supply gas in combination with the on-site gas source to ensure that the drive assembly 2 and the sealing agent injection pump 4 obtain stable high-pressure gas. Frame 1 is fixed in a suitable construction position. According to the required grouting volume, the grouting quota is set by adjusting the preset parameters of pneumatic counter 5. Drive component 2 is started, and grouting unit 3 starts to work. The grout output by grouting unit 3 is transported to mixing valve through pipeline. Mixing valve guides grout to mixing pipe. After being buffered and stabilized by mixing pipe, it is transported to grouting operation point by grouting pipe. At the same time, pneumatic counter 5 monitors the operating status of drive component 2 in real time. When the grouting volume reaches the preset quota, counter 5 triggers drive component 2 to stop working through pneumatic circuit, thus completing quantitative grouting.

[0051] After grouting is completed, the sealing agent injection pump 4 is started. The sealing agent enters the mixing valve and mixing pipe through the pipeline to flush and replace the residual grout in the above pipeline. The replaced residual grout is discharged together with the sealing agent to achieve the sealing and cleaning of the pipeline and prevent the residual grout from solidifying and clogging the pipeline.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pneumatic grouting device with sealing and replacement function, comprising a frame (1), characterized in that, The upper part of the frame (1) is provided with a drive component (2), which is used to drive the grouting unit (3) to work; A sealing agent injection pump (4) is also provided on the frame (1). The outlet ends of the sealing agent injection pump (4) and the grouting unit (3) are respectively connected to a mixing valve through pipelines. A mixing pipe is provided at the outlet end of the mixing valve, and a grouting pipe is provided at the outlet end of the mixing pipe. A counter (5) is also provided on the frame (1). The counter (5) is a pneumatic counter (5). The counter (5) and the drive component (2) form a pneumatic circuit. A pressurization assembly (6) is provided on the frame (1) located on one side of the plugging agent injection pump (4). The pressurization assembly (6) is used to provide high-pressure gas to the drive assembly (2) and the plugging agent injection pump (4) when the external gas source pressure is insufficient.

2. The pneumatic grouting device with sealing and replacement function according to claim 1, characterized in that, The drive assembly (2) includes a pneumatic motor (7) fixedly mounted on the frame (1). The output shaft of the pneumatic motor (7) is a plunger rod, which reciprocates linearly along the axial direction. The end of the plunger rod is fixedly connected to the piston of the grouting unit (3). The air inlet of the pneumatic motor (7) is connected to the air source through the air inlet pipe, and an air control valve (8) and an oil injector (9) are provided on the air inlet pipe.

3. The pneumatic grouting device with sealing and replacement function according to claim 2, characterized in that, The grouting unit (3) includes two large-capacity grouting pumps (10) and a small-capacity grouting pump (11). The small-capacity grouting pump (11) is located between the two large-capacity grouting pumps (10). The pump bodies of the large-capacity grouting pumps (10) and the small-capacity grouting pumps (11) are fixed on the frame (1) by mounting brackets (12). The piston rods of the large-capacity grouting pumps (10) and the small-capacity grouting pumps (11) are fixed by adapter plates (13). The adapter plate (13) is fixedly connected to the output end of the pneumatic motor (7), and the pneumatic motor (7) drives the piston rods of the large-capacity grouting pump (10) and the small-capacity grouting pump (11) to reciprocate.

4. The pneumatic grouting device with sealing and replacement function according to claim 1, characterized in that, The sealing agent injection pump (4) includes a pump body located on one side of the grouting unit (3). The pump body is a pneumatic plunger pump. The outlet end of the pneumatic plunger pump is connected to a mixing valve through a hose. The outlet end of the mixing valve is connected to a mixing pipe. The outlet end of the mixing pipe is provided with a grouting pipe.

5. The pneumatic grouting device with sealing and replacement function according to claim 4, characterized in that, The booster assembly (6) includes an air storage tank (14) and a booster pump (15) disposed on the frame (1). The air inlet of the air storage tank (14) is connected to the air outlet of the booster pump (15) through a pipe. The air storage tank (14) is provided with an air outlet. The outlet end of the gas storage tank (14) is provided with a tee with a valve. One port of the tee is connected to the gas outlet end of the gas storage tank (14), and the other two ports are connected to the air inlet ends of the drive assembly (2) and the sealing agent injection pump (4), respectively.

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