Concrete crack high pressure glue injection leak-proof slurry reverse pressure injection nozzle structure

Abstract

This invention relates to the technical field of anti-leakage reverse pressure grouting nozzle structure for high-pressure injection of adhesive into concrete cracks, specifically an anti-leakage reverse pressure grouting nozzle structure for high-pressure injection of adhesive into concrete cracks, comprising: a grouting nozzle body, a check valve connected to the top of the grouting nozzle body, a grouting pipe connected to the bottom of the grouting nozzle body, grouting channels simultaneously opened in the middle of the grouting nozzle body and the grouting pipe, and pressure relief channels simultaneously opened on both sides of the grouting nozzle body and the grouting pipe; the beneficial effect is that, in actual use, the anti-leakage reverse pressure grouting nozzle structure for high-pressure injection of adhesive into concrete cracks proposed in this invention first connects the grouting nozzle body to the grouting pipe through a threaded connector, and then inserts the grouting pipe at the bottom of the grouting nozzle body into the crack. At this time, the sealing gasket in the retaining ring groove at the bottom of the grouting nozzle body is tightly attached to the surface of the crack, preventing the grout from seeping out from the crack due to the reaction force.

Description

Technical Field

[0001] This invention relates to the technical field of anti-leakage reverse pressure grouting nozzle structure for high-pressure grouting of concrete cracks, specifically an anti-leakage reverse pressure grouting nozzle structure for high-pressure grouting of concrete cracks. Background Technology

[0002] During long-term use, concrete structures are prone to developing through-cracks or non-through-cracks due to factors such as load changes, temperature stress, or material aging. To restore the integrity of the structure, high-pressure grouting is often used to repair these cracks. As a key component for grout injection, the grouting nozzle's structural performance directly affects the grouting efficiency and repair quality.

[0003] However, most existing grouting nozzles use one-way valves or simple sealing structures. During high-pressure grouting, when the grouting pressure fluctuates instantaneously or the machine stops, the grout in the crack flows back along the grouting channel under the reverse pressure, causing the residual grout inside the grouting nozzle to solidify and block it, affecting subsequent re-grouting. The grouting nozzle and concrete interface are not tightly sealed, and high-pressure grout can easily seep out from the contact gap, which not only wastes materials but may also contaminate the surface of the component and reduce the repair strength. During high-pressure grouting, the grouting pipe is easily affected by the reaction force of the grout, and may loosen or even pop out of the crack, causing grouting to be interrupted and requiring reinstallation, which seriously affects construction efficiency and safety. Summary of the Invention

[0004] The purpose of this invention is to provide a reverse pressure grouting nozzle structure for high-pressure grouting of concrete cracks to prevent leakage, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a grouting nozzle body, a check valve connected to the top of the grouting nozzle body, a grouting pipe connected to the bottom of the grouting nozzle body, a grouting channel simultaneously opened in the middle of the grouting nozzle body and the grouting pipe, and pressure relief channels simultaneously opened on both sides of the grouting nozzle body and the grouting pipe; a rotating groove is opened on the other two sides of the grouting pipe, the rotating groove is opened on the outside of the grouting channel, and multiple sets of protrusions are opened on the surface of the grouting pipe on the outside of the rotating groove, the protrusions containing conical nails.

[0006] Preferably, the top of the check valve is connected to a threaded connector, which can be connected to a grouting pipe through the threaded portion to supply grout to the grouting nozzle body.

[0007] Preferably, the bottom of the grouting nozzle body is provided with a retaining ring groove, in which a sealing gasket is retained. The sealing gasket can fit tightly against the surface of the gap and seal the gap.

[0008] Preferably, the top of the grouting pipe is provided with a retaining ring groove, in which an expansion sealing ring is held. The expansion sealing ring expands when it comes into contact with water, further sealing the gap. Both the sealing gasket and the expansion sealing ring can be quickly installed and removed from the retaining ring groove.

[0009] Preferably, the grouting nozzle body has through holes on both sides of the bottom of the check valve. The through holes are connected to the grouting channel in the middle of the grouting nozzle body. The through holes penetrate the grouting nozzle body. A sealing head is inserted into the outside of the through hole to seal the outer opening of the through hole.

[0010] Preferably, the top of the pressure relief channel opened on both sides of the grouting channel of the grouting nozzle body is connected to the through hole, and a rubber sealing piece is provided on the inner side of the pressure relief channel in the through hole. The top of the rubber sealing piece is fixedly connected to the inner wall of the through hole, and the bottom of the rubber sealing piece is tightly attached to the inner wall of the through hole.

[0011] Preferably, a spring is provided on the inner side of the rotating groove at a position parallel to the protrusion. The inner side of the spring is connected to the inner wall of the rotating groove, and the outer side of the spring is connected to the conical nail in the protrusion. The spring can drive the conical nail to extend and retract.

[0012] Preferably, the inner sides of the cone nail are set as arc surfaces, and a rotating ring is provided on the outer bottom of the grouting nozzle body. An L-shaped connecting plate is connected to the inner side of the rotating ring. The L-shaped connecting plate is inserted into the rotating grooves opened on both sides of the grouting pipe through the rotating cavity at the bottom of the grouting nozzle body.

[0013] Preferably, the L-shaped connecting plate is disposed on one side of the rotating groove, and multiple sets of extrusion blocks are disposed on the upright of the L-shaped connecting plate, the extrusion blocks being parallel to the inner bottom of the conical nail elastically connected in the rotating groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention proposes a reverse pressure grouting nozzle structure for high-pressure grouting in concrete cracks to prevent leakage. In actual use, the grouting nozzle body is first connected to the grouting pipe via a threaded connector. Then, the grouting pipe at the bottom of the nozzle body is inserted into the crack. At this time, the sealing gasket in the retaining ring groove at the bottom of the nozzle body is tightly pressed against the surface of the crack, preventing the grout from seeping out of the crack due to the reaction force. Then, by rotating the rotating ring at the bottom of the grouting nozzle body, the rotating ring drives the L-shaped connecting plate to rotate in the rotating groove. At this time, the L-shaped connecting plate is connected to the conical nail. The parallel extrusion blocks on the inner bottom begin to compress the arc surfaces on both sides of the bottom of the cone nail. Through gradual compression, the cone nail is forced out of the protrusion and embedded into both sides of the crack. This prevents the grouting pipe from loosening or even popping out of the crack due to the reaction force of the grout. Grouting is then initiated. The grout flows unidirectionally through the check valve into the grouting channel in the middle of the grouting nozzle body and the grouting pipe, and then flows out from the bottom of the grouting channel for grouting. When the grout in the crack flows back along the grouting channel under the reverse pressure, the backflowing grout enters the through hole and then... When the impact force on the rubber sealing plate in the through hole reaches its withstand threshold, the bottom of the rubber sealing plate undergoes elastic deformation and bends, opening the seal on the through hole. At this time, the grout flows back to the grouting point through the pressure relief channel connected to the through hole, and while the pressure is being released, the grouting channel is replenished. Furthermore, when the grout comes into contact with the expansion sealing ring in the retaining groove at the top of the grouting pipe, the expansion sealing ring begins to absorb the water in the grout, causing the expansion sealing ring to expand and reseal the crack, preventing further damage. Grout seepage occurs; after grouting is completed, the rotating ring is rotated in the opposite direction to reset the L-shaped connecting plate. At this time, the squeezing block releases the squeezing of the cone nail, and the spring at the rear end of the cone nail retracts the cone nail into the protruding opening through the contraction force. Then, the grouting pipe is removed from the crack, thus completing the grouting. Further sealing gaskets and expansion sealing rings can be quickly disassembled and replaced. At the same time, by removing the plug head on the outside of the through hole, the residual grout in the pressure relief channel is flushed out of the pressure relief channel by water flow, preventing the grout from solidifying and blocking the pressure relief channel. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0018] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 4 This is a schematic diagram of another cross-sectional view of the present invention;

[0020] Figure 5 for Figure 4Enlarged schematic diagram of the structure at point B;

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the grouting pipe of the present invention;

[0022] Figure 7 This is a three-dimensional structural diagram of the rotating ring and L-shaped connecting plate of the present invention.

[0023] In the diagram: 1. Grouting nozzle body; 2. Threaded connector; 3. Check valve; 4. Grouting pipe; 5. Sealing gasket; 6. Expansion sealing ring; 7. Grouting channel; 8. Through hole; 9. Rubber sealing plate; 10. Pressure relief channel; 11. Sealing head; 12. Rotating groove; 13. Spring; 14. Conical nail; 15. Protrusion; 16. Rotating ring; 17. L-shaped connecting plate; 18. Extrusion block. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1 to 7 The present invention provides a technical solution: a grouting nozzle body 1, a check valve 3 connected to the top of the grouting nozzle body 1, a grouting pipe 4 connected to the bottom of the grouting nozzle body 1, a grouting channel 7 opened in the middle of the grouting nozzle body 1 and the grouting pipe 4, and a pressure relief channel 10 opened on both sides of the grouting nozzle body 1 and the grouting pipe 4; a rotating groove 12 opened on the other two sides of the grouting pipe 4, the rotating groove 12 being opened on the outside of the grouting channel 7, and multiple sets of protrusions 15 opened on the surface of the grouting pipe 4 on the outside of the rotating groove 12, the protrusions 15 containing a conical nail 14; an L-shaped connecting plate 17, through a pressing block 18 parallel to the bottom of the inner side of the conical nail 14, begins to press the arc surfaces on both sides of the bottom of the conical nail 14, and through gradual pressing, the conical nail 14 is squeezed out from the protrusions 15 and embedded into both sides of the crack.

[0026] The top of the check valve 3 is connected to a threaded connector 2, which can connect to the grouting pipe through the threaded part to supply grout to the grouting nozzle body 1. The bottom of the grouting nozzle body 1 is provided with a retaining ring groove, in which a sealing gasket 5 is held. The sealing gasket 5 can fit tightly against the surface of the gap to seal the gap. The top of the grouting pipe 4 is also provided with a retaining ring groove, in which an expansion sealing ring 6 is held. The expansion sealing ring 6 expands when it comes into contact with water, further sealing the gap. Both the sealing gasket 5 and the expansion sealing ring 6 can be quickly installed and removed from the retaining ring groove. When the grout comes into contact with the expansion sealing ring 6 in the retaining ring groove at the top of the grouting pipe 4, the expansion sealing ring 6 begins to absorb the water in the grout, causing the expansion sealing ring 6 to expand and seal the crack again, preventing grout from seeping out.

[0027] The grouting nozzle body 1 has through holes 8 on both sides of the bottom of the check valve 3. The through holes 8 are connected to the grouting channel 7 in the middle of the grouting nozzle body 1. The through holes 8 penetrate the grouting nozzle body 1. A sealing head 11 is inserted into the outside of the through hole 8 to seal the outer opening of the through hole 8. The top of the pressure relief channel 10 on both sides of the grouting channel 7 is connected to the through hole 8. A rubber sealing piece 9 is provided on the inner side of the pressure relief channel 10 of the through hole 8. The top of the rubber sealing plate 9 is fixedly connected to the inner wall of the through hole 8, and the bottom of the rubber sealing plate 9 is tightly attached to the inner wall of the through hole 8. The grout that flows back enters the through hole 8 and then impacts the rubber sealing plate 9 in the through hole 8. When the impact force reaches the bearing threshold of the rubber sealing plate 9, the bottom of the rubber sealing plate 9 undergoes elastic deformation and bends, opening the seal on the through hole 8. At this time, the grout flows back to the grouting point along the pressure relief channel 10 connected to the through hole 8.

[0028] Inside the rotating groove 12, a spring 13 is provided parallel to the outlet 15. The inner side of the spring 13 is connected to the inner wall of the rotating groove 12, and the outer side of the spring 13 is connected to the conical nail 14 in the outlet 15. The spring 13 can drive the conical nail 14 to extend and retract. The inner sides of the conical nail 14 are set as arc surfaces. A rotating ring 16 is provided on the outer side of the bottom of the grouting nozzle body 1. The inner side of the rotating ring 16 is connected to an L-shaped connecting plate 17. The L-shaped connecting plate 17 is inserted into the rotating cavity on both sides of the grouting pipe 4 through the rotating cavity at the bottom of the grouting nozzle body 1. In the groove 12, an L-shaped connecting plate 17 is set on one side of the rotating groove 12. Multiple sets of extrusion blocks 18 are set on the upright of the L-shaped connecting plate 17. The extrusion blocks 18 are parallel to the inner bottom of the conical nail 14 that is elastically connected in the rotating groove 12. By rotating the rotating ring 16 in the opposite direction, the rotating ring 16 drives the L-shaped connecting plate 17 to reset. At this time, the extrusion blocks 18 release the extrusion of the conical nail 14. The spring 13 at the rear end of the conical nail 14 drives the conical nail 14 to retract into the protrusion 15 through the contraction force. Then, the grouting pipe 4 is taken out from the crack, thus completing the grouting.

[0029] In actual use, first connect the grouting nozzle body 1 to the grouting pipe through the threaded connector 2. Then, insert the grouting pipe 4 at the bottom of the grouting nozzle body 1 into the crack. At this time, the sealing gasket 5 in the retaining ring groove at the bottom of the grouting nozzle body 1 is tightly attached to the surface of the crack to prevent the grout from seeping out from the crack due to the reaction force. Then, by rotating the rotating ring 16 at the bottom of the grouting nozzle body 1, the rotating ring 16 drives the L-shaped connecting plate 17 to rotate in the rotating groove 12. At this time, the L-shaped connecting plate 17, through the extrusion block 18 parallel to the bottom of the inner side of the cone nail 14, begins to press against the bottom sides of the cone nail 14. The arc surface is squeezed, and through gradual squeezing, the cone nail 14 is forced out from the protrusion 15 and embedded into both sides of the crack, preventing the grouting pipe 4 from loosening or even popping out of the crack due to the reaction force of the grout. Then, grouting is started, and the grout flows unidirectionally through the check valve 3 into the grouting channel 7 in the middle of the grouting nozzle body 1 and the grouting pipe 4, and then flows out from the bottom of the grouting channel 7 for grouting. When the grout in the crack flows back along the grouting channel 7 under the action of reverse pressure, the backflowing grout enters the through hole 8, and then impacts the rubber sealing piece 9 in the through hole 8. When the force reaches the bearing threshold of the rubber sealing piece 9, the bottom of the rubber sealing piece 9 undergoes elastic deformation and bends, opening the seal on the through hole 8. At this time, the grout flows back to the grouting point through the pressure relief channel 10 connected to the through hole 8, and while the pressure is being relieved, the grouting in the grouting channel 7 is replenished. Furthermore, when the grout comes into contact with the expansion sealing ring 6 in the retaining groove at the top of the grouting pipe 4, the expansion sealing ring 6 begins to absorb the water in the grout, causing the expansion sealing ring 6 to expand and reseal the crack, preventing grout leakage. After grouting is completed, the pipe is rotated in the opposite direction. Rotate ring 16 to reset L-shaped connecting plate 17. At this time, the squeezing block 18 releases the squeezing of cone nail 14. Spring 13 at the rear end of cone nail 14 drives cone nail 14 to retract into protrusion 15 through contraction force. Then, grouting pipe 4 is removed from crack, thus completing grouting. The sealing gasket 5 and expansion sealing ring 6 can be quickly disassembled and replaced. At the same time, by removing the plug head 11 on the outside of through hole 8, the residual grout in pressure relief channel 10 is flushed out of pressure relief channel 10 by water flow, preventing grout from solidifying and blocking pressure relief channel 10.

[0030] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A reverse pressure grouting nozzle structure for high-pressure grouting in concrete cracks to prevent leakage, characterized in that: include: The grouting nozzle body (1) is connected to a check valve (3) at the top and a grouting pipe (4) at the bottom. A grouting channel (7) is opened in the middle of the grouting nozzle body (1) and the grouting pipe (4). A pressure relief channel (10) is opened on both sides of the grouting nozzle body (1) and the grouting pipe (4). The grouting pipe (4) has rotating grooves (12) on both sides inside. The rotating grooves (12) are located on the outside of the grouting channel (7). On the surface of the grouting pipe (4), multiple sets of protrusions (15) are opened on the outside of the rotating grooves (12). The protrusions (15) contain cone nails (14). The grouting nozzle body (1) has through holes (8) on both sides of the bottom of the check valve (3). The through holes (8) are connected to the grouting channel (7) in the middle of the grouting nozzle body (1). The through holes (8) penetrate the grouting nozzle body (1). A plug (11) is inserted into the outside of the through holes (8). The plug (11) seals the outside opening of the through holes (8). The top of the pressure relief channel (10) opened on both sides of the grouting channel (7) of the grouting nozzle body (1) is connected to the through hole (8). A rubber sealing piece (9) is provided on the inner side of the pressure relief channel (10) of the through hole (8). The top of the rubber sealing piece (9) is fixedly connected to the inner wall of the through hole (8), and the bottom of the rubber sealing piece (9) is tightly attached to the inner wall of the through hole (8). The inner sides of the cone nail (14) are set as arc surfaces. A rotating ring (16) is provided on the outer bottom of the grouting nozzle body (1). An L-shaped connecting plate (17) is connected to the inner side of the rotating ring (16). The L-shaped connecting plate (17) is inserted into the rotating groove (12) opened on both sides of the grouting pipe (4) through the rotating cavity at the bottom of the grouting nozzle body (1). The L-shaped connecting plate (17) is located on one side of the rotating groove (12). Multiple sets of extrusion blocks (18) are provided on the upright of the L-shaped connecting plate (17). The extrusion blocks (18) are parallel to the inner bottom of the tapered nail (14) that is elastically connected in the rotating groove (12).

2. The anti-leakage reverse pressure grouting nozzle structure for high-pressure grouting in concrete cracks according to claim 1, characterized in that: The top of the check valve (3) is connected to a threaded connector (2), which can be connected to the grouting pipe through the threaded part to supply grout to the grouting nozzle body (1).

3. The anti-leakage reverse pressure grouting nozzle structure for high-pressure grouting in concrete cracks according to claim 2, characterized in that: The bottom of the grouting nozzle body (1) is provided with a retaining ring groove, in which a sealing gasket (5) is held. The sealing gasket (5) can fit tightly against the surface of the gap and seal the gap.

4. The anti-leakage reverse pressure grouting nozzle structure for high-pressure grouting in concrete cracks according to claim 3, characterized in that: The top of the grouting pipe (4) is provided with a retaining ring groove, in which an expansion sealing ring (6) is held. The expansion sealing ring (6) expands when it comes into contact with water, further sealing the gap. Both the sealing gasket (5) and the expansion sealing ring (6) can be quickly installed and removed from the retaining ring groove.

5. The anti-leakage reverse pressure grouting nozzle structure for high-pressure grouting in concrete cracks according to claim 4, characterized in that: On the inner side of the rotating groove (12), a spring (13) is provided at a position parallel to the protrusion (15). The inner side of the spring (13) is connected to the inner wall of the rotating groove (12), and the outer side of the spring (13) is connected to the cone nail (14) in the protrusion (15). The spring (13) can drive the cone nail (14) to extend and retract.

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