A vacuum-assisted grouting device

Abstract

This utility model provides a vacuum-assisted grouting device, relating to the field of grouting. The vacuum-assisted grouting device includes a mixing and storage cylinder and a mixing blade inside for stirring. A feeding cover plate, which can be opened and remains sealed after closing, is provided above the mixing and storage cylinder. A power mechanism for driving the blade to move up and down and rotate is fixedly installed in the upper middle part of the mixing and storage cylinder. A vacuum pump for drawing a vacuum is provided above the mixing and storage cylinder. A discharge pipe is connected to and passes through the outer side of the mixing and storage cylinder. This vacuum-assisted grouting device, by driving the mixing blade to move up and down and rotate through the power mechanism, can accelerate the removal of air bubbles from the bottom of the grout. Simultaneously, a mud pump extracts the stirred mud from the bottom and discharges it back to the mixing and storage cylinder from the top, thereby ensuring that the grout from the upper and lower parts is mixed evenly and preventing the presence of air bubbles in the grout.

Description

Technical Field

[0001] This utility model relates to the field of grouting technology, specifically to a vacuum-assisted grouting device. Background Technology

[0002] Pipe grouting is an important measure to inject cement grout into pipes using a grouting machine to prevent steel strand corrosion, extend the service life of components, and ensure that the steel strands are firmly bonded to the concrete to transfer stress. Grouting must be dense and full.

[0003] Traditional grouting equipment typically involves mixing raw materials and water together using a mixing device, and then using a grouting pump to force the grout into the gaps or pipes. However, after mixing, the grout often contains a large number of air bubbles, which can ultimately reduce the quality of the components. Therefore, vacuum treatment is often performed on the grout.

[0004] Existing vacuum-assisted grouting devices vacuum the grout to reduce the impact of air bubbles. However, when vacuuming high-viscosity cement grout, air bubbles located in the lower part of the grout do not easily rise. Eliminating air bubbles requires the vacuum pump to work continuously for a long time. The grout will evaporate water when it is in a vacuum environment for a long time, which will reduce the quality of the grout. Some air bubbles will also stick to the side wall of the tank. Air bubbles stuck to the side wall are difficult to rise due to surface tension and adhesion.

[0005] During the slurry mixing process, the following procedures must be followed:

[0006] 1. Before mixing the slurry, add an appropriate amount of water and run the mixer empty for a few minutes to thoroughly wet the inner wall of the bucket;

[0007] 2. Add the weighed water to the mixing bucket and then add cement while stirring. Stir for 3-5 minutes until homogeneous.

[0008] 3. Pour the additive into the mixing tank, stir again for 5-15 minutes, check the consistency, and then put it into the storage tank through a sieve.

[0009] 4. The mixing of the slurry placed into the storage tank should not be stopped, regardless of whether it is pumped immediately.

[0010] Therefore, the storage process after the slurry is mixed still requires continuous stirring. Transferring the mixed slurry not only increases the workflow but also the equipment used. Utility Model Content

[0011] To address the shortcomings of existing technologies, this utility model provides a vacuum-assisted grouting device that solves the problem of incomplete air bubble removal when the grout is viscous, as mentioned in the background technology.

[0012] To achieve the above objectives, this utility model is implemented through the following technical solution: a vacuum-assisted grouting device, comprising a mixing and storage cylinder and a mixing blade inside for mixing, wherein a feeding cover plate is provided on the top of the mixing and storage cylinder, which can be opened and remains sealed after being closed, a power mechanism for driving the blade to move up and down and rotate is fixedly installed in the middle of the top of the mixing and storage cylinder, a vacuum pump for drawing a vacuum is provided on the top of the mixing and storage cylinder, a discharge pipe is connected to and passes through the outside of the mixing and storage cylinder, a mud pump is connected to and passes through the end of the discharge pipe away from the mixing and storage cylinder, a three-way valve is connected to and passes through the output end of the mud pump, a return pipe is connected to one output end of the three-way valve, the return pipe is connected to and passes through the mixing and storage cylinder from the top, and a sealing on / off valve that can control opening and closing is provided on the other output end of the three-way valve.

[0013] Furthermore, the stirring blade includes a central connecting part, with blades fixedly installed on the outer ring of the central connecting part, and a set of outward-pointing extension rods fixedly installed on the upper side wall of the central connecting part, with the outer ring of the extension rods sleeved around a scraper ring that contacts the inner wall of the stirring storage cylinder.

[0014] Furthermore, the power mechanism includes a connecting plate fixedly connected to the central connecting part, a rotating ring rotatably engaged above the connecting plate, a square shaft sleeve fixedly installed at the center of the connecting plate, a square shaft slidably connected inside the square shaft sleeve, a motor fixedly installed at the top of the stirring storage tank, the output end of the motor rotatably connected to the stirring storage tank and extending into the interior of the stirring storage tank, the output end of the motor being fixedly connected to the square shaft, a reciprocating telescopic rod fixedly installed above the stirring storage tank, the free end of the reciprocating telescopic rod penetrating the stirring storage tank and extending into the interior of the stirring storage tank, and the free end of the reciprocating telescopic rod being fixedly connected to the rotating ring.

[0015] Furthermore, a filtration mechanism is provided between the discharge pipe and the mud pump.

[0016] Furthermore, the filtration mechanism includes a sleeve, one end of which is connected to and passes through a discharge pipe, and a connecting pipe connected to and passes through a mud pump is provided on the side wall of the sleeve. An annular filter screen is provided inside the sleeve, and a connecting plug is threadedly connected to the end of the sleeve away from the discharge pipe. The filter screen and the connecting plug are fixedly connected.

[0017] Furthermore, the side wall of the stirring storage cylinder is provided with a cleaning drain plug that can be rotated and removed.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This vacuum-assisted grouting device uses a power mechanism to drive the mixing blades to move up and down and rotate, thereby accelerating the removal of air bubbles from the bottom grout. At the same time, a mud pump is set up to extract the mixed mud from the bottom and discharge it back to the mixing and storage cylinder from the top, so that the grout from the top and bottom can be mixed evenly, thus avoiding the presence of air bubbles in the grout.

[0020] 2. The vacuum-assisted grouting device includes a sleeve with a filter mechanism. One end of the sleeve is connected to and passes through a discharge pipe. The side wall of the sleeve is provided with a connecting pipe that is connected to and passes through a mud pump. An annular filter screen is provided inside the sleeve. A connecting plug is threaded to the end of the sleeve away from the discharge pipe. The filter screen and the connecting plug are fixedly connected. This arrangement forms a cavity in which large particles of material are temporarily stored without affecting the overall use. Large particles can be discharged during cleaning after use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the connection of the three-way valve of this utility model;

[0023] Figure 3 This is a half-sectional schematic diagram of the stirring and storage cylinder of this utility model;

[0024] Figure 4 This is a schematic diagram of the connection of the power mechanism of this utility model.

[0025] The components include: 1. Mixing and storage tank; 2. Mixing blades; 3. Feeding cover plate; 4. Power mechanism; 5. Vacuum pump; 6. Discharge pipe; 7. Slurry pump; 8. Three-way valve; 9. Return pipe; 10. Sealing and opening / closing valve; 201. Central connecting part; 202. Blade; 203. Extension rod; 204. Scraper ring; 401. Connecting plate; 402. Rotating ring; 403. Square shaft sleeve; 404. Square shaft; 405. Reciprocating telescopic rod; 406. Motor; 11. Filtering mechanism; 111. Sleeve; 112. Connecting pipe; 113. Filter screen; 114. Connecting plug; 12. Sewage plug. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] See Figures 1-4A vacuum-assisted grouting device includes a mixing and storage cylinder 1 and a mixing blade 2 for internal mixing. A feeding cover 3 is provided above the mixing and storage cylinder 1, which can be opened and remains sealed after closing. A power mechanism 4 for driving blades 202 to move up and down and rotate is fixedly installed in the middle of the upper part of the mixing and storage cylinder 1. A vacuum pump 5 for vacuuming is provided above the mixing and storage cylinder 1. A discharge pipe 6 is connected to and passes through the outer side of the mixing and storage cylinder 1. A mud pump 7 is connected to and passes through the end of the discharge pipe 6 away from the mixing and storage cylinder 1. The output end of the mud pump 7 is connected to and passes through three... The three-way valve 8 has one output end connected to a return pipe 9, which connects to and runs through the mixing and storage tank 1 from the top. The other output end of the three-way valve 8 is equipped with a sealing valve 10 that can control opening and closing. The stirring blade 2 is driven to move up and down and rotate by the power mechanism 4, which can accelerate the discharge of air bubbles from the bottom slurry. At the same time, the mud pump 7 is set to extract the mixed mud from the bottom and discharge it back to the mixing and storage tank 1 from the top, so that the slurry at the top and bottom can be mixed evenly, thereby avoiding the presence of air bubbles in the slurry.

[0028] The stirring blade 2 includes a central connecting part 201. A blade 202 is fixedly installed on the outer ring of the central connecting part 201. A set of outward-pointing extension rods 203 are fixedly installed on the upper side wall of the central connecting part 201. The outer ring of the extension rods 203 is sleeved with a scraper ring 204 that contacts the inner wall of the stirring storage cylinder 1. By setting the scraper ring 204, air bubbles attached to the cylinder wall can be scraped off, preventing air bubbles from adhering to the stirring storage cylinder 1.

[0029] The power mechanism 4 includes a connecting plate 401 fixedly connected to the central connecting part 201. A rotating ring 402 is rotatably engaged above the connecting plate 401. A square shaft sleeve 403 is fixedly installed at the center of the connecting plate 401. A square shaft 404 is slidably connected inside the square shaft sleeve 403. A motor 406 is fixedly installed at the top of the stirring storage tank 1. The output end of the motor 406 is rotatably connected to the stirring storage tank 1 and extends into the interior of the stirring storage tank 1. The output end of the motor 406 is fixedly connected to the square shaft 404. A reciprocating telescopic rod 405 is fixedly installed above the stirring storage tank 1. The free end of the reciprocating telescopic rod 405 passes through the stirring storage tank 1 and extends into the interior of the stirring storage tank 1. The free end of the reciprocating telescopic rod 405 is fixedly connected to the rotating ring 402. This solution is a relatively mature and convenient combination mechanism for realizing vertical movement and driving rotation.

[0030] A filter mechanism 11 is installed between the discharge pipe 6 and the mud pump 7. The filter mechanism 11 can isolate large particles in the slurry and prevent them from affecting the performance of the slurry during use.

[0031] The filter mechanism 11 includes a sleeve 111. One end of the sleeve 111 is connected to and passes through the discharge pipe 6. The side wall of the sleeve 111 is provided with a connecting pipe 112 that is connected to and passes through the mud pump 7. An annular filter screen 113 is provided inside the sleeve 111. A connecting plug 114 is threadedly connected to the end of the sleeve 111 away from the discharge pipe 6. The filter screen 113 is fixedly connected to the connecting plug 114. With this arrangement, the filter screen 113 will form a cavity that can temporarily store large particles without affecting the overall use. When cleaning after use, the large particles can be discharged.

[0032] The side wall of the mixing storage tank 1 is provided with a rotatable cleaning drain plug 12. Opening the cleaning drain plug 12 can discharge the cleaning wastewater into the mixing storage tank 1.

[0033] In use, first place water in the mixing storage tank 1, and use the rotating mixing blade 2 to wet the entire mixing storage tank 1. Then add the weighed water to the slurry mixing bucket and add cement and other additives while stirring. After the addition is completed, reset the feeding cover plate 3 to form a seal, start the vacuum pump 5 to draw a vacuum, and use the power mechanism 4 to drive the mixing blade 2 to move up and down and rotate to fully stir the mortar until the internal air bubbles are discharged. Start the mud pump 7 and switch to the return pipe 9 end for discharge through the three-way valve 8. By continuously stirring and circulating the slurry, until the grouting pump and the sealing valve 10 are connected, switch the three-way valve 8 to connect with the sealing valve 10 and open the sealing valve 10 to complete the discharge.

[0034] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A vacuum-assisted grouting device, comprising a mixing and storage cylinder (1) and a mixing blade (2) for internal mixing, characterized in that: The mixing storage cylinder (1) is provided with a feeding cover plate (3) that can be opened and closed and remains sealed. The mixing storage cylinder (1) is fixedly installed with a power mechanism (4) that drives the blades (202) to move up and down and rotate. A vacuum pump (5) for vacuuming is provided above the mixing storage cylinder (1). A discharge pipe (6) is connected to and passes through the outside of the mixing storage cylinder (1). A mud pump (7) is connected to and passes through the end of the discharge pipe (6) away from the mixing storage cylinder (1). A three-way valve (8) is connected to and passes through the output end of the mud pump (7). A return pipe (9) is connected to and passes through the top of the mixing storage cylinder (1). A sealing valve (10) that can control opening and closing is provided at the other output end of the three-way valve (8).

2. The vacuum-assisted grouting device according to claim 1, characterized in that: The stirring blade (2) includes a central connecting part (201), and a blade (202) is fixedly installed on the outer ring of the central connecting part (201). A set of outward-pointing extension rods (203) is fixedly installed on the upper side wall of the central connecting part (201). The outer ring of the extension rods (203) is sleeved with a scraper ring (204) that contacts the inner wall of the stirring storage cylinder (1).

3. A vacuum-assisted grouting device according to claim 1 or 2, characterized in that: The power mechanism (4) includes a connecting plate (401) fixedly connected to the central connecting part (201), a rotating ring (402) is rotatably engaged above the connecting plate (401), a square shaft sleeve (403) is fixedly installed at the center of the connecting plate (401), a square shaft (404) is slidably connected inside the square shaft sleeve (403), a motor (406) is fixedly installed at the top of the stirring storage tank (1), the output end of the motor (406) is rotatably connected to the stirring storage tank (1) and extends into the interior of the stirring storage tank (1), and the output end of the motor (406) is fixedly connected to the square shaft (404). A reciprocating telescopic rod (405) is fixedly installed above the stirring storage cylinder (1). The free end of the reciprocating telescopic rod (405) passes through the stirring storage cylinder (1) and extends into the interior of the stirring storage cylinder (1). The free end of the reciprocating telescopic rod (405) is fixedly connected to the rotating ring (402).

4. The vacuum-assisted grouting device according to claim 1, characterized in that: A filter mechanism (11) is provided between the discharge pipe (6) and the mud pump (7).

5. A vacuum-assisted grouting device according to claim 4, characterized in that: The filtering mechanism (11) includes a sleeve (111), one end of which is connected to and passes through the discharge pipe (6). The side wall of the sleeve (111) is provided with a connecting pipe (112) that is connected to and passes through the mud pump (7). An annular filter screen (113) is provided inside the sleeve (111). A connecting plug (114) is threadedly connected to the end of the sleeve (111) away from the discharge pipe (6). The filter screen (113) and the connecting plug (114) are fixedly connected.

6. The vacuum-assisted grouting device according to claim 3, characterized in that: The side wall of the stirring storage cylinder (1) is provided with a cleaning drain plug (12) that can be rotated and removed.

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