Concrete injection device for repairing cracks in cold region in winter

Abstract

The utility model discloses a concrete injection device for repairing cracks in a cold region in winter, and relates to the technical field of building structure repairing. A spiral main shaft is mounted on the mixing barrel through a bearing, a plurality of mixing rods are mounted on the outer side wall of the spiral main shaft, an electric valve is mounted on a discharge pipe at the bottom of the mixing barrel and connected with one end of a delivery pump through a pipeline, and the other end of the delivery pump is connected with the upper side wall of the injector through a pipeline; the mixing cylinder is adopted to realize mixing of conductive concrete, the mixing motor is adopted to drive the spiral main shaft to rotate during mixing, and meanwhile, the mixing rod on the spiral main shaft is used for mixing raw materials, so that the conductive concrete is uniformly mixed, and when the conductive concrete is stored, the mixing motor rotates at a low speed; and during joint filling, the needle head is arranged in a gap, the pressure pump enables the conductive concrete in the material injector to enter the gap in a pressurizing mode, and rapid operation is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of building structure repair technology, specifically relating to a concrete injection device for repairing cracks in cold regions during winter. Background Technology

[0002] With the development of the construction industry, concrete, due to its excellent quality and low cost, is increasingly used in water conservancy projects, road projects, culverts and tunnels, bridges, and building structures. However, because concrete has relatively poor tensile and shear strength, it is prone to cracking, leading to insufficient strength development and reduced durability, thus affecting its normal use. There are many methods for repairing concrete cracks, including grouting, dry filling, nailing, polymer impregnation (gravity impregnation and vacuum impregnation), and surface sealing. The State Intellectual Property Office has disclosed a method for curing concrete used to repair cracks in cold winter regions, publication number CN112727139B. This patent discloses a curing method achieved through a filling-type curing device, which includes an infrared thermal imager, a voltage regulator, a temperature control switch, an alarm, and two electrode injectors. However, when filling the two electrode injectors with conductive concrete, the filling difficulty is relatively low for cracks with larger widths and simpler directions, but difficult for cracks with smaller widths and complex, multi-directional directions. The filling quality is affected by the shape and depth of the crack, and a unified and standardized filling treatment method has not been formed. Specific problems when filling cracks mainly include:

[0003] 1. When using a syringe to draw in concrete, it is necessary to maintain full contact with the concrete during the suction process. Otherwise, a large amount of air will appear in the syringe during suction, resulting in a small amount of concrete in the injector. This requires multiple suction cycles, which is time-consuming and tedious.

[0004] 2. In order to save the time of the syringe pumping material back and forth, it is necessary to use an external material pump or other pump equipment to transport concrete. However, during operation, the piston of the syringe needs to be pulled out. After the material is injected, the piston can be installed again. This saves some time, but the space inside the syringe is limited. When the gap is large and deep, it is necessary to replenish the material multiple times, which increases the complexity of the operation.

[0005] Furthermore, specifically, conductive concrete may solidify or separate during storage after mixing, resulting in poor performance when used. Therefore, a feeding device that works with a syringe is needed to inject conductive concrete. Utility Model Content

[0006] To address the problems mentioned in the background section, the purpose of this invention is to provide a concrete injection device for repairing cracks in cold regions during winter.

[0007] This utility model discloses a concrete injection device for repairing cracks in cold regions during winter, comprising a mixing cylinder, a spiral main shaft, mixing rods, a mixing motor, a sealing cover, an electric valve, a feed pump, an injector, a needle, electrode plates, a support plate, a pressure pump, a sealing plate, and a connector. The mixing cylinder is fitted with a spiral main shaft via bearings. Several mixing rods are mounted on the outer wall of the spiral main shaft. A mixing motor is mounted on the upper end of the mixing cylinder, and the shaft of the mixing motor is connected to the upper end of the spiral main shaft. A sealing cover is mounted on the feed pipe of the mixing cylinder. An electric valve is mounted on the discharge pipe at the bottom of the mixing cylinder. The electric valve is connected to one end of the feed pump via a pipe, and the other end of the feed pump is connected to the upper side wall of the injector via a pipe. A support plate is mounted on the lower end of the injector, and a needle is inserted into the middle of the lower end of the injector. Electrodes are mounted on both sides of the needle. A sealing plate is mounted on the upper end of the injector, and an air hole is opened in the middle of the sealing plate. A connector is mounted on the upper end of the air hole, and the connector is connected to the pressure pump via a pipe.

[0008] Preferably, an end plate is installed on the upper end face of the mixing cylinder, a feed pipe is provided on one side of the end plate, a V-shaped plate is provided at the bottom of the mixing cylinder, and a discharge pipe is connected to the middle of the V-shaped plate.

[0009] Preferably, the mixing drum is equipped with wheels at all four corners of its bottom, and the wheels are self-locking wheels.

[0010] Preferably, the outer wall of the spiral spindle is provided with a concave spiral groove, and the upper end of the spiral spindle is integrally connected to a connecting shaft.

[0011] Preferably, the injector includes an injector cylinder, a handle, a needle socket, and an injector connector; the handle is symmetrically installed on the two upper side walls of the injector cylinder, the needle socket is integrally connected to the bottom of the injector cylinder, the injector connector is connected to the outer upper side wall of the injector cylinder, and several threaded holes are opened on the upper end face of the injector cylinder.

[0012] Preferably, the needle has an injection groove inside, and the upper end of the injection groove is connected to a plug groove.

[0013] Preferably, the bottom of the support sheet is provided with an adhesive layer, and the middle of the support sheet is provided with an installation slot.

[0014] Preferably, the sealing plate has several fixing through holes at its inner edge.

[0015] Preferably, a sealing gasket is installed at the bottom of the sealing plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is a tool for emergency repair of cracks in cold winter regions, which can improve the quality of crack repair in cold winters and facilitate the formation of a standardized, fast and effective repair process. Specific advantages include:

[0017] 1. A mixing drum is used to mix conductive concrete. During mixing, a mixing motor drives a spiral main shaft to rotate, while a mixing rod on the spiral main shaft mixes the raw materials, making the conductive concrete uniform. When storing conductive concrete, the mixing motor rotates at a low speed to ensure the conductive concrete itself is uniform, reducing the probability of solidification and material separation.

[0018] Second, when injecting material into the injector, a material pump is used to transport conductive concrete, so that the conductive concrete is temporarily stored in the injector.

[0019] 3. When filling the cracks, place the needle inside the crack and support it with the support plate. At the same time, start the pressure pump. The pressure pump pressurizes the conductive concrete in the injector into the crack, which facilitates the corresponding filling operation for cracks of different widths and directions. This makes the filling effect full and tight, and helps to reduce the occurrence of blind spots that are not effectively filled in small areas. Attached Figure Description

[0020] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[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 mixing cylinder in this utility model;

[0023] Figure 3 This is a schematic diagram of the spiral spindle in this utility model;

[0024] Figure 4 This is a bottom view of the sealing cap in this utility model;

[0025] Figure 5 This is a schematic diagram of the injector structure in this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the needle and electrode sheet in this utility model;

[0027] Figure 7 This is a bottom view of the support sheet in this utility model;

[0028] Figure 8 This is a schematic diagram of the sealing plate and the connector in this utility model.

[0029] In the diagram: 1-Mixing cylinder; 2-Spiral spindle; 3-Mixing rod; 4-Mixing motor; 5-Sealing cover; 6-Electric valve; 7-Feed pump; 8-Injector; 9-Needle; 10-Electrode plate; 11-Support plate; 12-Pressure pump; 13-Sealing plate; 14-Connector.

[0030] 1-1-End plate; 1-2-V-shaped plate; 1-3-Feed pipe; 1-4-Walking wheel; 1-5-Discharge pipe;

[0031] 2-1-Helical groove; 2-2-Connecting shaft;

[0032] 8-1-Injection cylinder; 8-2-Handle; 8-3-Needle connector; 8-4-Injection connector; 8-5-Connecting threaded hole;

[0033] 9-1-Plug-in slot;

[0034] 11-1-Adhesive layer; 11-2-Mounting slot;

[0035] 13-1-Fixing through hole; 13-2-Sealing gasket. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. The structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0037] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0038] like Figures 1 to 8As shown, this specific embodiment uses a mixing cylinder 1 to insert conductive concrete raw materials and achieve rapid mixing of the materials. The specific technical solution includes a mixing cylinder 1, a spiral main shaft 2, mixing rods 3, a mixing motor 4, and a sealing cover 5. The spiral main shaft 2 is mounted on the mixing cylinder 1 via bearings. Several mixing rods 3 are mounted on the outer wall of the spiral main shaft 2. The mixing motor 4 is mounted on the upper end face of the mixing cylinder 1. The shaft of the mixing motor 4 is connected to the upper end of the spiral main shaft 2. After starting, the mixing motor 4 drives the spiral main shaft 2 to rotate. When the spiral main shaft 2 rotates, the mixing rods 3 on it rotate accordingly. The mixing of raw materials is achieved through the cooperation of the spiral main shaft 2 and the mixing rod 3. A sealing cover 5 is installed on the feed pipe of the mixing cylinder 1, which can be opened. Raw materials are added into the feed pipe: cement, silica fume, fine sand, and water in a mass ratio of 1:0.15:0.5:0.3. Simultaneously, 1% of the cement volume fraction of fiber is added. The mixing sequence is as follows: first, the cement, silica fume, and conductive fiber are dry-mixed evenly to form a mixture; then, water is added and mixing continues. Simultaneously, 1.0–3.0 wt% of water-reducing agent is added to adjust the viscosity and flowability of the composite material; finally, fine sand is added until the mixture is evenly mixed. Then, the mixing motor 4 rotates at low speed. Figure 2 As shown, an end plate 1-1 is installed on the upper end face of the mixing cylinder 1. A feed pipe 1-3 is provided on one side of the end plate 1-1, which enables feeding. A V-shaped plate 1-2 is provided at the bottom of the mixing cylinder 1, which enables material gathering and facilitates subsequent discharge. A discharge pipe 1-5 is connected to the middle of the V-shaped plate 1-2, which enables material discharge. Four self-locking wheels 1-4 are installed at the four corners of the bottom of the mixing cylinder 1, enabling the mixing cylinder 1 to move while also being self-locking. Figure 3 As shown, the outer wall of the spiral spindle 2 is provided with a concave spiral groove 2-1. The spiral groove 2-1 can realize feeding during mixing, making the mixing more uniform. The upper end of the spiral spindle 2 is integrally connected to a connecting shaft 2-2, and the connecting shaft 2-2 is connected to the shaft of the drive motor 4 through a bushing.

[0039] like Figure 1 As shown, in this specific embodiment, the feed pump 7 is used to feed material into the injector 8, facilitating rapid material injection into the injector 8. The specific technical solution adopted is as follows: It includes an electric valve 6, a feed pump 7, and an injector 8; an electric valve 6 is installed on the discharge pipe at the bottom of the mixing cylinder 1. The electric valve 6 is connected to one end of the feed pump 7 via a pipe, and the other end of the feed pump 7 is connected to the upper side wall of the injector 8 via a pipe. The electric valve 6 can be opened to supply material to the feed pump 7, and the feed pump 7 can inject material into the injector 8, facilitating the temporary storage of conductive concrete, such as... Figure 5As shown, the injector 8 includes an injection cylinder 8-1, a handle 8-2, a needle insertion seat 8-3, and an injection connector 8-4. The handles 8-2 are symmetrically installed on the two upper side walls of the injection cylinder 8-1, allowing the injection cylinder 8-1 to be held. The needle insertion seat 8-3 is integrally connected to the bottom of the injection cylinder 8-1, allowing the needle 9 to be installed. The injection connector 8-4 is connected to the outer upper side wall of the injection cylinder 8-1, allowing it to be connected to the feed pump 7 for easy injection of material into the injection cylinder 8-1. Several threaded holes 8-5 are provided on the upper end face of the injection cylinder 8-1, allowing the sealing plate 13 to be installed.

[0040] like Figure 1 As shown, in this specific embodiment, conductive concrete is injected using a needle 9, and the electrode plate 10 can be connected to a voltage regulator to facilitate the application of voltage to the conductive concrete. The specific technical solution is as follows: it includes a needle 9, an electrode plate 10, and a support plate 11; the lower end of the injector 8 is equipped with a support plate 11, which supports the injector 8. A needle 9 is inserted into the middle of the lower end of the injector 8, allowing the needle 9 to extend into the gap. Electrode plates 10 are installed on both sides of the needle 9, and the electrode plates 10 can be connected to a voltage regulator to facilitate the application of voltage to the conductive concrete. Figure 6 As shown, the needle 9 has an internal injection groove, and the upper end of the injection groove is connected to an insertion slot 9-1. The insertion slot 9-1 can be inserted into the needle insertion socket 8-3, facilitating the installation and removal of the needle 9. Figure 7 As shown, a self-adhesive layer 11-1 is installed at the bottom of the support sheet 11, and an installation slot 11-2 is opened in the middle of the support sheet 11. The self-adhesive layer 11-1 can achieve bonding, which facilitates the temporary fixation of the injector 8.

[0041] like Figure 1 As shown, in this specific embodiment, the filler 8 fills the gap by pressurizing the filler pump 12. The specific technical solution is as follows: it includes a pressurizing pump 12, a sealing plate 13, and a connector 14. A sealing plate 13 is installed on the upper surface of the filler 8, which seals the upper end of the filler 8. An air hole is opened in the middle of the sealing plate 13, and a connector 14 is installed at the upper end of the air hole. The connector 14 is connected to the pressurizing pump 12 via a pipe. The connector 14 is a quick-connect fitting, facilitating the connection of the pressurizing pipe of the pressurizing pump 12. Figure 8 As shown, several fixing through holes 13-1 are provided at the inner edge of the sealing plate 13. The fixing through holes 13-1 correspond to the connecting threaded holes 8-5, so that the sealing plate 13 can be sealed and fixed with the injector 8. A sealing gasket 13-2 is installed at the bottom of the sealing plate 13, which can improve the sealing performance.

[0042] The working principle of this specific embodiment is as follows: During use, raw materials are added through the feed pipes 1-3 of the mixing cylinder 1. The raw materials are cement, silica fume, fine sand, and water, mixed in a mass fraction ratio of 1:0.15:0.5:0.3. Simultaneously, 1% of the cement volume fraction of fiber is added. The mixing sequence is as follows: first, the cement, silica fume, and conductive fiber are dry-mixed evenly to form a mixture; then, water is added and mixing continues. Simultaneously, 1.0–3.0 wt% of water-reducing agent is added to adjust the viscosity and flowability of the composite material; finally, fine sand is added until the mixture is uniform. During mixing, the mixing motor 4 drives the spiral main shaft 2 and the mixing rod 3 to rotate and mix, facilitating the mixing of conductive concrete. After the raw materials are mixed evenly, the mixing motor 4 rotates at low speed. When it is necessary to feed material to the injector 8, the electric valve 6 is opened, and the feed pump 7 delivers the conductive concrete in the mixing cylinder 1 to the injector 8. The conductive concrete is temporarily stored in the injector 8. When it is necessary to fill the gap, the needle 9 at the bottom of the injector 8 is placed into the gap. The injector 8 is supported by the support plate 11. During filling, the injector 8 is pressurized by the pressure pump 12. The conductive concrete is put into the gap by pressurization. After filling is completed, the injector 8 is removed, and the needle 9 remains in the gap. At this time, the electrode plate 10 is connected to the voltage regulator to facilitate the application of voltage to the conductive concrete.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A concrete injection device for winter crack repair in cold regions, characterized by: The system includes a mixing cylinder (1), a spiral spindle (2), mixing rods (3), a mixing motor (4), a sealing cover (5), an electric valve (6), a feed pump (7), a feeder (8), a needle (9), an electrode plate (10), a support plate (11), a pressure pump (12), a sealing plate (13), and a connector (14). The mixing cylinder (1) is equipped with a spiral spindle (2) via bearings. Several mixing rods (3) are installed on the outer wall of the spiral spindle (2). The mixing motor (4) is installed on the upper end face of the mixing cylinder (1). The shaft of the mixing motor (4) is connected to the upper end of the spiral spindle (2). A sealing cover is installed on the feed pipe of the mixing cylinder (1). An electric valve (6) is installed on the discharge pipe at the bottom of the cover (5) and mixing cylinder (1). The electric valve (6) is connected to one end of the conveying pump (7) through a pipe. The other end of the conveying pump (7) is connected to the upper side wall of the injector (8) through a pipe. A support plate (11) is installed at the lower end of the injector (8). A needle (9) is inserted into the middle of the lower end of the injector (8). Electrode plates (10) are installed on both sides of the needle (9). A sealing plate (13) is installed on the upper end face of the injector (8). An air hole is opened in the middle of the sealing plate (13). A connector (14) is installed at the upper end of the air hole. The connector (14) is connected to the pressure pump (12) through a pipe.

2. The concrete injection device for repairing cracks in winter in cold regions according to claim 1, characterized in that: An end plate (1-1) is installed on the upper end face of the mixing cylinder (1), a feed pipe (1-3) is provided on one side of the end plate (1-1), a V-shaped plate (1-2) is provided at the bottom of the mixing cylinder (1), and a discharge pipe (1-5) is connected to the middle of the V-shaped plate (1-2).

3. The concrete injection device for repairing cracks in winter in cold regions according to claim 2, characterized in that: The mixing cylinder (1) is equipped with four wheels (1-4) at the bottom corners. The wheels (1-4) are self-locking wheels.

4. The concrete injection device for repairing cracks in winter in cold regions according to claim 1, characterized in that: The outer wall of the spiral spindle (2) is provided with a concave spiral groove (2-1), and the upper end of the spiral spindle (2) is integrally connected with a connecting shaft (2-2).

5. The concrete injection device for repairing cracks in winter in cold regions according to claim 1, characterized in that: The injector (8) includes an injection cylinder (8-1), a handle (8-2), a needle socket (8-3), and an injection connector (8-4). The handle (8-2) is symmetrically installed on the two upper side walls of the injection cylinder (8-1). The needle socket (8-3) is integrally connected to the bottom of the injection cylinder (8-1). The injection connector (8-4) is connected to the outer upper side wall of the injection cylinder (8-1). Several threaded holes (8-5) are opened on the upper end face of the injection cylinder (8-1).

6. A concrete injection device for repairing cracks in cold regions during winter, as described in claim 1, characterized in that: The needle (9) has an injection groove inside, and the upper end of the injection groove is connected to a plug groove (9-1).

7. The concrete injection device for repairing cracks in winter in cold regions according to claim 1, characterized in that: The bottom of the support sheet (11) is fitted with an adhesive layer (11-1), and the middle part of the support sheet (11) is provided with an installation slot (11-2).

8. The concrete injection device for repairing cracks in winter in cold regions according to claim 1, characterized in that: Several fixing through holes (13-1) are provided at the inner edge of the sealing plate (13).

9. The concrete injection device for repairing cracks in winter in cold regions according to claim 8, characterized in that: A sealing gasket (13-2) is installed at the bottom of the sealing plate (13).

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