Vacuum grouting device for grouting sleeve at important joint of concrete prefabricated structure

Abstract

The utility model provides a vacuum grouting device of a grouting sleeve at an important node of a concrete prefabricated structure, two ends of the grouting sleeve are respectively inserted into main reinforcements, and the grouting sleeve comprises an upper grout outlet, a lower grout inlet and a pre-buried grout outlet pipe which is communicated with the grout outlet and is pre-buried in the concrete prefabricated structure. The pre-buried grout outlet pipe is communicated with the grout inlet, the pre-buried grout inlet pipe is communicated with the grout inlet and pre-buried in the concrete prefabricated structure, the lower portion of the Y-opening control ball valve is communicated with the pre-buried grout outlet pipe, and two branches of the upper portion of the Y-opening control ball valve are communicated with the vacuum mechanism and the grout inlet mechanism respectively. The vacuum mechanism is used for conducting vacuum treatment on the grout outlet pipeline and the grouting sleeve, so that the interiors of the pre-buried grout outlet pipeline and the grouting sleeve are in a negative pressure state, the Y-opening control ball valve is controlled to seal the vacuum mechanism and open the grouting pipeline, then the integrity of grouting in the grouting sleeve is achieved, and cavities in mortar are reduced; and the connection strength, stability and quality of important nodes of the prefabricated structure are ensured.

Description

A vacuum grouting device for grouting sleeves at important joints of precast concrete structures. Technical Field

[0001] This utility model relates to the field of building curtain wall technology, and in particular to a vacuum grouting device for grouting sleeves at important nodes of precast concrete structures. Background Technology

[0002] Grouting sleeves for rebar connections are metal sleeves manufactured using casting or machining processes, used for grouting connections of rebars. They are simply called grouting sleeves. Grouting sleeves are equipped with grouting holes and grout outlet holes. The grouting hole is the inlet for adding grout. The grout outlet hole is for venting during grouting and for draining excess grout after filling. A joint where both ends of the grouting sleeve are connected to the rebar using grouting is called a fully grouting sleeve.

[0003] Grouting material for rebar sleeve connections is a dry-mixed material made from cement as the base material, combined with fine aggregates, admixtures, and other materials. It is used for grouting connections of rebar sleeves. After being mixed with water in a specified ratio, the grout mixture exhibits specified fluidity, early strength, high strength, and micro-expansion properties upon hardening. The grout mixture is introduced into the grout sleeve through a conduit via a grouting hole, thus completing the grouting process. A normal grouting operation is shown in Figure 2, where the arrows indicate the flow direction of the grout. The hardened grout binds to both the rebar and the grout sleeve, transferring the force from one rebar to another, achieving a continuous and reliable force transmission connection.

[0004] In large and even super-large precast components, if grouting is directly applied to the joint connection points, i.e. the location of the grouting sleeve, it is not feasible to carry out direct grouting construction due to safety concerns and the aesthetics of large components. Therefore, a sealed channel is added to the grouting sleeve's grouting and outlet holes, extending to a safe and concealed working space. This allows the grout to enter the grouting sleeve through the channel, and after the grouting sleeve is saturated, it flows out through the outlet at the other end of the channel. Such a sealed channel connecting the grouting sleeve's grouting inlet and outlet holes is called a grouting channel.

[0005] During the grouting process, blockages often occur in the grouting channels and even inside the grouting sleeve due to the inherent properties of the grout itself and external conditions such as temperature and humidity. This prevents the grout from reaching the saturation level inside the sleeve and ensuring the connection strength of the component joints. Once the grout outlet is blocked, the internal gas cannot escape during grouting because there is only one opening to the outside atmosphere. This continuous compression creates voids, affecting the bond between the grout and the reinforcing steel and the grouting sleeve. This can lead to unpredictable construction quality problems at the joints, as shown in the schematic diagram in Figure 3. Summary of the Invention

[0006] To overcome the problems existing in the prior art, this utility model provides a vacuum grouting device for grouting sleeves at important joints of precast concrete structures. This utility model grouts precast component joints that are blocked by grouting channels or grouting sleeves, solving the problem that only single-channel grouting is possible when the joints of large or even ultra-large precast components are blocked.

[0007] A vacuum grouting device for a grouting sleeve at an important node of a precast concrete structure, wherein the main reinforcing bars are inserted into both ends of the grouting sleeve, the grouting sleeve includes an upper grout outlet, a lower grout inlet, a grout outlet pipe pre-embedded in the precast concrete structure and connected to the grout outlet, and a grout inlet pipe pre-embedded in the precast concrete structure and connected to the grout inlet, and further includes a Y-port control ball valve, a vacuum mechanism and a grout inlet mechanism, wherein the lower part of the Y-port control ball valve is connected to the pre-embedded grout outlet pipe, and the two upper branches of the Y-port control ball valve are respectively connected to the vacuum mechanism and the grout inlet mechanism.

[0008] Furthermore, the vacuum mechanism includes a comprehensive pipeline, a vacuum machine, an upper detachable pipe, a lower detachable pipe, a slurry storage pipe, a vacuum pipeline, and a vacuum gauge. One end of the comprehensive pipeline is connected to an upper branch of the Y-port control ball valve, and the other end of the comprehensive pipeline is connected to one end of the slurry storage pipe through the lower detachable pipe. The other end of the slurry outlet pipe is connected to one end of the vacuum pipe through the upper detachable pipe, and the other end of the vacuum pipe is connected to the vacuum machine. The vacuum gauge is installed on the vacuum pipeline.

[0009] Furthermore, the grouting mechanism includes a grouting pipeline, a grouting device, and a check valve. One end of the grouting pipeline is connected to another branch of the upper part of the Y-port control ball valve, and the other end of the grouting pipeline is connected to one end of the grouting device. The other end of the grouting device is the grout inlet. A closable vent hole is provided on the grouting pipeline near the Y-port control ball valve. The check valve is located on the grouting pipeline near the grouting device.

[0010] Furthermore, the grouting device is a grouting funnel, which includes an inlet pipe and an outlet hopper. The inlet pipe is connected to the other end of the grouting pipeline. The closable vent hole includes a piston and a small round hole. The small round hole is located on the grouting pipeline near the Y-port control ball valve, and the piston is inserted into the small round hole.

[0011] The beneficial effects of this utility model are as follows:

[0012] (1) This utility model can realize vacuum grouting inside the grouting sleeve and grouting pipe, effectively ensuring that the grouting inside the grouting sleeve reaches saturation, and solving the long-standing problem of insufficient grouting and substandard strength inside the grouting sleeve of the precast component connection node.

[0013] (2) This utility model can be used with grouting equipment and vacuum machines of various specifications and power to meet the grouting construction requirements of grouting sleeves and grouting channels under different working conditions;

[0014] (3) This utility model can effectively solve the problem that the grouting sleeve inside the precast component cannot be grouted and cannot be replaced due to blockage caused by various factors, thus affecting the subsequent grouting construction. It has good application prospects. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the vacuum grouting device for a grouting sleeve at an important node of a precast concrete structure according to this utility model.

[0016] Figure 2 is a schematic diagram of the grouting sleeve in normal working condition without grout blockage and without vacuum grouting device;

[0017] Figure 3 is a schematic diagram of the abnormal working state of grout blockage in the grouting sleeve without a vacuum grouting device.

[0018] Explanation of symbols in the attached diagram:

[0019] 1. Vacuum machine, 2. Vacuum pipeline, 3. Vacuum gauge, 4. Grout storage pipe, 5. Lower detachable pipe, 6. Grouting device, 7. Upper detachable pipe, 8. Grouting pipeline, 9. Closable vent hole, 10. Check valve, 11. Y-port control ball valve, 12. Integrated pipeline, 13. Grouting sleeve, 14. Embedded grout outlet pipe, 15. Embedded grout inlet pipe, 16. Main reinforcing bar, Arrow: Indicates the direction of grout inlet and outlet. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0022] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] In the description of this patent, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] A vacuum grouting device for a grouting sleeve at an important node of a precast concrete structure, as shown in Figure 1, wherein the grouting sleeve 13 has reinforcing bars 16 inserted into both ends. The grouting sleeve includes an upper grout outlet, a lower grout inlet, a pre-embedded grout outlet pipe 14 connected to the grout outlet and embedded in the precast concrete structure, and a pre-embedded grout inlet pipe 15 connected to the grout inlet and embedded in the precast concrete structure. The device is characterized by further including a Y-port control ball valve 11, a pre-embedded grout inlet pipe piston, a vacuum mechanism, and a grout inlet mechanism. The lower part of the Y-port control ball valve 11 is connected to the pre-embedded grout outlet pipe 14, and the two upper branches of the Y-port control ball valve 11 are connected to the vacuum mechanism and the grout inlet mechanism, respectively. The pre-embedded grout inlet pipe piston is inserted into the opening of the pre-embedded grout inlet pipe.

[0025] The upper part of the Y-port control ball valve 11 connects the vacuum mechanism and the grouting mechanism. The opening and closing of both mechanisms are controlled via the Y-port control ball valve 11. After the vacuum grouting device is installed at the pre-embedded grout outlet, the lower part of the Y-port control ball valve is connected to the pre-embedded grouting pipe 14. The Y-port control ball valve 11 is then controlled to open the vacuum mechanism and close the grouting mechanism, performing vacuuming of the lower grouting channel and grouting sleeve. When the vacuum gauge reaches the specified negative pressure value, the vacuuming is complete. The Y-port control ball valve 11 is then controlled to close the connection with the vacuum mechanism and open the connection with the grouting mechanism to perform grouting.

[0026] This invention addresses the issue of blockage in the pre-embedded grout inlet pipe 15 of the grouting sleeve 13 at critical nodes of large precast concrete structures, as shown in Figure 3, which is equivalent to inserting a piston into the pre-embedded grout inlet pipe 15. This invention involves installing a vacuum grouting device on the pre-embedded grout outlet pipe of the grouting sleeve. The vacuum grouting device solves the problem of grouting being impossible due to blockage in the pre-embedded grout inlet pipe or the grouting sleeve itself at critical nodes of large precast concrete structures. Alternatively, when the pre-embedded grout inlet pipe or the grouting sleeve itself is unblocked, the piston can be inserted into the opening of the pre-embedded grout inlet pipe, and grouting can be performed using a vacuum filling device. Using this invention improves grouting quality and avoids problems such as incomplete grouting and insufficient strength. It is adaptable to the grouting construction requirements of the grouting sleeve and grouting channel under different working conditions.

[0027] Further, as shown in Figure 1, the vacuum mechanism includes a comprehensive pipeline 12, a vacuum machine 1, an upper detachable pipe 7, a lower detachable pipe 5, a slurry storage pipe 4, a vacuum pipeline 2, and a vacuum gauge 3. One end of the comprehensive pipeline 12 is connected to a branch of the upper part of the Y-port control ball valve 11, and the other end of the comprehensive pipeline 12 is connected to one end of the slurry storage pipe 4 through the lower detachable pipe. The other end of the slurry storage pipe 4 is connected to one end of the vacuum pipeline 2 through the upper detachable pipe. The other end of the vacuum pipeline 2 is connected to the vacuum machine 1. The vacuum gauge 3 is installed on the vacuum pipeline 2. The vacuum pipeline 2 provides a gas passage for the vacuum machine 1 to evacuate. The vacuum gauge 3 is used to check the internal vacuum degree of the pre-embedded slurry pipe 14 and the grouting sleeve 13 to ensure that they are in a negative pressure state after evacuation. The slurry storage pipe 4 is used as a buffer pipeline for the material inside the pipe during the evacuation process. Its functions are: first, to prevent impurities from entering the vacuum machine and causing damage during the evacuation process; and second, to prevent excessive grout from flowing out and entering the vacuum machine during the grouting process, causing damage. The upper detachable pipe 7 and the lower detachable pipe 5 connect the vacuum machine 1, the vacuum pipeline 2, the slurry storage pipe 4, and the integrated pipeline 12 to form a vacuum mechanism, which facilitates the installation and disassembly of the vacuum mechanism, as well as its cleaning and storage.

[0028] Further, as shown in Figure 1, the grouting mechanism includes a grouting device 6, a grouting pipeline 8, and a stop-start valve 10. One end of the grouting pipeline 8 is connected to another branch of the upper part of the Y-port control ball valve 11, and the other end of the grouting pipeline 8 is connected to one end of the grouting device 6. The other end of the grouting device is the grouting port. A closable vent hole 9 is provided on the grouting pipeline 8 near the Y-port control ball valve 11. The stop-start valve is located on the grouting pipeline 8, near the grouting device 6. The grouting pipeline 8 provides a channel for grout material during pipeline grouting. The stop-start valve 10 controls the opening and closing of the grouting pipeline. The closable vent hole 9 is used to remove air from the grouting pipeline to ensure the quality of the grout material. When the vacuum gauge 3 shows negative pressure, the stop-start valve 10 is opened, and the vent hole 9 is adjusted to fill the upper grouting pipeline 8 with grout material before closing the vent hole 9. Then, the Y-port control ball valve 11 is controlled to close the vacuum mechanism and open the grouting mechanism to grout the grouting sleeve.

[0029] Further, as shown in Figure 1, the grouting device 6 is a grouting funnel, which includes a funnel tube and a grout inlet. The funnel tube and the grout inlet are integrally formed, and the funnel tube is connected to the other end of the grouting pipeline 8. The closable vent 9 includes a piston and a small round hole. The small round hole is located on the grouting pipeline near the Y-port control ball valve 11, and the piston is inserted into the small round hole. In this embodiment, the grouting device 6 is a grouting funnel. In this embodiment, the closable vent 9 includes a piston and a small round hole. When it is necessary to open the closable vent 9, the piston is pulled out of the small round hole to fill the grouting pipeline 8 with grout, and then the piston is inserted into the small round hole to close the closable vent 9.

[0030] Furthermore, as shown in Figure 1, the pre-embedded slurry inlet pipe piston is a rubber stopper. In this embodiment, the pre-embedded slurry inlet pipe piston is a rubber stopper.

[0031] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.

Claims

1. A vacuum grouting device for a grouting sleeve at an important node of a precast concrete structure, wherein the grouting sleeve (13) has main reinforcing bars (16) inserted into both ends, the grouting sleeve includes an upper grout outlet, a lower grout inlet, a grout outlet pipe (14) pre-embedded in the precast concrete structure and connected to the grout outlet, and a grout inlet pipe (15) pre-embedded in the precast concrete structure and connected to the grout inlet, characterized in that, It also includes a Y-port control ball valve (11), a pre-embedded slurry inlet pipe piston, a vacuum mechanism and a slurry inlet mechanism. The lower part of the Y-port control ball valve (11) is connected to the pre-embedded slurry outlet pipe (14), and the two upper branches of the Y-port control ball valve (11) are connected to the vacuum mechanism and the slurry inlet mechanism respectively. The pre-embedded slurry inlet pipe piston is inserted into the opening of the pre-embedded slurry inlet pipe.

2. The vacuum grouting device for grouting sleeves at important nodes of precast concrete structures according to claim 1, characterized in that, The vacuum mechanism includes a comprehensive pipeline (12), a vacuum machine (1), an upper detachable pipe (7), a lower detachable pipe (5), a slurry storage pipe (4), a vacuum pipeline (2), and a vacuum gauge (3). One end of the comprehensive pipeline (12) is connected to a branch of the upper part of the Y-port control ball valve (11), and the other end of the comprehensive pipeline (12) is connected to one end of the slurry storage pipe (4) through the lower detachable pipe. The other end of the slurry storage pipe (4) is connected to one end of the vacuum pipeline (2) through the upper detachable pipe. The other end of the vacuum pipeline (2) is connected to the vacuum machine (1). The vacuum gauge (3) is installed on the vacuum pipeline (2).

3. The vacuum grouting device for grouting sleeves at important nodes of precast concrete structures according to claim 2, characterized in that, The grouting mechanism includes a grouting device (6), a grouting pipeline (8), and a stop valve (10). One end of the grouting pipeline (8) is connected to another branch of the upper part of the Y-port control ball valve (11), and the other end of the grouting pipeline (8) is connected to one end of the grouting device (6). The other end of the grouting device is the grout inlet. A closable vent hole (9) is provided on the grouting pipeline (8) near the Y-port control ball valve (11). The stop valve (10) is provided on the grouting pipeline (8) near the grouting device (6).

4. The vacuum grouting device for grouting sleeve at critical joint of concrete precast structure according to claim 3, characterized in that, The grouting device (6) is a grouting funnel, which includes a funnel tube and a grout inlet. The funnel tube and the grout inlet are integrally formed. The funnel tube is connected to the other end of the grouting pipeline (8). The closable vent (9) includes a piston and a small round hole. The small round hole is located on the grouting pipeline near the Y-port control ball valve (11). The piston is inserted into the small round hole.

5. The apparatus according to claim 1, wherein, The pre-embedded grout inlet piston is a rubber stopper.

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