Handheld grouting equipment

Abstract

The handheld grouting equipment comprises a bendable outer pipe, the end steering assembly is mounted at one end of the bendable outer pipe; the grouting spray head is mounted at the top end of the end steering assembly; the connecting steering assembly comprises a horizontal steering assembly and a vertical steering assembly, the horizontal steering assembly and the vertical steering assembly are installed at the ends of every two adjacent sub-pipes correspondingly, and the movable end of the horizontal steering assembly is fixedly connected with the movable end of the vertical steering assembly. According to the technical scheme, multi-dimensional accurate and flexible steering is realized; through the bendable outer pipe, bending of the grouting pipeline can be achieved, and an operator can control the equipment on the construction handle to conduct controllable bending in multiple directions; the grouting nozzle is independently driven by the end steering assembly, so that the position and angle of the grouting nozzle can be adjusted approximately in all directions in the space, and an operator does not need to frequently move the position of the operator or adjust the posture of the whole equipment in order to align to the grouting position.

Description

Technical Field

[0001] This invention relates to the field of handheld grouting, and more particularly to a handheld grouting device. Background Technology

[0002] Handheld grouting equipment is a core tool for repairing concrete structures, fixing cracks, anchoring bolts, and filling small voids. Its working principle involves manually applying pressure, mechanically driving, or using pneumatic or hydraulic pumps to force repair materials such as epoxy resin or cement-based grout into the cracks or holes to be repaired.

[0003] Existing handheld grouting equipment mostly uses rigid pipes or single-angle nozzles, which lack flexibility and adaptability. Operators often need to frequently move themselves or adjust the entire equipment's posture to align with the grouting location, resulting in high labor intensity, low efficiency, and significant difficulties in complex environments such as narrow spaces, high altitudes, or inside structures, sometimes even preventing effective grouting operations and impacting construction quality and progress. Furthermore, while some attempts have used flexible hose connections to provide some flexibility, the tube shape is difficult to precisely control and maintain, leading to poor grouting direction accuracy, grout splashing, or inaccurate delivery to the target area. Therefore, there is an urgent need for a handheld device capable of multi-dimensional, precise, and flexible directional grouting to improve the convenience, accuracy, and safety of construction in complex conditions.

[0004] In response to the problems of the grouting equipment mentioned above, we provide a handheld grouting device. Summary of the Invention

[0005] The purpose of this invention is to overcome the problem that existing grouting equipment cannot be bent for grouting, and to provide a handheld grouting device that can be bent.

[0006] The objective of this invention is achieved as follows:

[0007] A handheld grouting device, comprising a bendable outer tube;

[0008] An end-steering assembly is installed at one end of the flexible outer tube;

[0009] A grouting nozzle is mounted on top of the end deflector assembly.

[0010] Furthermore, the bendable outer tube includes several sub-tubes and a connecting steering assembly, with the connecting steering assembly installed between two of the sub-tubes.

[0011] Furthermore, the connecting steering assembly includes a horizontal steering assembly and a vertical steering assembly. The horizontal steering assembly and the vertical steering assembly are respectively installed at the ends of two adjacent sub-tubes, and the movable end of the horizontal steering assembly is fixedly connected to the movable end of the vertical steering assembly.

[0012] Furthermore, the horizontal steering assembly has the same structure as the vertical steering assembly.

[0013] Furthermore, the horizontal steering assembly includes a base frame, a U-shaped plate, a rotating shaft, a steering gear, a rack, a mounting plate, and a steering push rod. The base frame is installed at one end of the inner cavity of the sub-tube, and the U-shaped plate is installed on the side of the base frame away from the sub-tube. The rotating shaft is rotatably connected between the two ends of the U-shaped plate. The steering gear is installed on one side of the rotating shaft, and the mounting plate is installed on the middle side of the U-shaped plate. The steering push rod is installed on the top surface of the mounting plate, and the rack is installed at the output end of the steering push rod. The rack meshes with the steering gear for transmission.

[0014] Furthermore, the middle part of the rotating shaft is fixedly connected to the vertical steering assembly.

[0015] Furthermore, the horizontal steering assembly also includes a limiting rod, with the limiting rod provided at one end of the U-shaped plate near the rack, and the other end of the limiting rod extending outward to a limiting end, which is slidably connected to the rear side of the rack.

[0016] Furthermore, the bend of the flexible outer tube is covered with a connecting hose.

[0017] Furthermore, a construction handle is provided at the other end of the bendable outer tube.

[0018] Furthermore, the end steering assembly includes an end bracket, a rotating motor, a transmission gear, a gear ring, a transmission rod, an end plate, a positioning shaft, a connecting shaft, a support rod, a top plate, a sliding plate, and a connecting rod. The end of the bendable outer tube is rotatably connected to the end plate. A plurality of transmission rods are provided on the bottom surface of the end plate, and a gear ring is provided on the inner side of the transmission rod. The end bracket is provided at the end of the inner cavity of the bendable outer tube. The rotating motor is mounted on the top surface of the end bracket. The output shaft of the rotating motor is provided with the transmission gear, which meshes with the gear ring for transmission. A plurality of support rods are provided on the top surface of the end plate. A top plate is inclinedly provided on the top surface of the support rods. A sliding plate is slidably connected to the top surface of the top plate. Both the top plate and the sliding plate are annular plates. The positioning shaft is provided at the center of the top surface of the end bracket. The positioning shaft extends to the upper part of the end plate. The top end of the positioning shaft is rotatably connected to the connecting shaft. The other end of the connecting shaft is connected to the grouting nozzle. A connecting rod is provided on the top surface of the sliding plate, and the other end of the connecting rod is fixedly connected to the connecting shaft.

[0019] Furthermore, a pressure regulating component is installed inside the flexible outer tube.

[0020] Furthermore, the pressure regulating assembly includes a pressure regulating connecting plate, a pressure regulating ring, a dividing tube, a pressure applying tube, a connector, a push rod base plate, a pressure applying push rod, a pressure applying end, and a telescopic wall. Several pressure regulating rings are arranged longitudinally together. Several pressure regulating connecting plates are provided on the outer sides of the upper and lower pressure regulating rings. The other end of each pressure regulating connecting plate is fixedly connected to the inner wall of the bendable outer tube. A pressure applying tube is provided through the center of several pressure regulating rings. Connectors are installed at both ends of the pressure applying tube. A dividing tube is provided in the middle of the inner cavity of each pressure regulating ring. The dividing tube is concentric with the pressure regulating ring and divides the inner cavity of the pressure regulating ring into an electrical cavity and a pressure applying cavity. Push rod base plates are vertically arranged on both sides of the electrical cavity. A pressure applying push rod is installed on the side of the push rod base plate facing the pressure applying tube. A pressure applying end is provided at the output end of the pressure applying push rod. Installation grooves are provided through both sides of the dividing tube, and telescopic walls are installed in the installation grooves.

[0021] Advantages of this invention:

[0022] 1. The technical solution of this application achieves multi-dimensional, precise, and flexible steering. The bendable outer pipe allows for bending of the grouting pipe, and operators can control the equipment to bend in multiple directions via the construction handle. Combined with the independent drive of the grouting nozzle by the end steering component, the grouting nozzle can achieve near-omnidirectional position and angle adjustment within space, greatly enhancing the equipment's adaptability to complex and concealed grouting points. This eliminates the need for operators to frequently move themselves or adjust the entire equipment's posture to align with the grouting position.

[0023] 2. The technical solution of this application, through the adaptive pressure balance structure of the pressure regulating component, not only eradicates the macroscopic defect of insufficient grouting, but also systematically solves the problems of low grout density, weak interfacial bonding strength and poor long-term durability from the microscopic mechanism. Thus, the quality of hand-held grouting is improved from manual operation that depends on individual experience to a precision engineering level where process parameters are controllable and results are stable and reproducible. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a handheld grouting device.

[0025] Figure 2 This is a cross-sectional structural diagram of a handheld grouting device.

[0026] Figure 3 This is an enlarged view of point A.

[0027] Figure 4 This is a schematic diagram of the connecting steering component structure.

[0028] Figure 5 This is an enlarged view of point B.

[0029] Figure 6 This is a schematic diagram of the end steering assembly.

[0030] Figure 7 This is an enlarged view of point C.

[0031] Figure 8 This is a schematic diagram of the voltage regulating component.

[0032] Figure 9 This is a schematic diagram of the cross-sectional structure of the pressure regulator.

[0033] In the diagram: 1. Bendable outer tube, 11. Sub-tube, 12. Connecting steering assembly, 121. Horizontal steering assembly, 1211. Base frame, 1212. U-shaped plate, 1213. Rotary shaft, 1214. Steering gear, 1215. Rack, 1216. Mounting plate, 1217. Steering push rod, 1218. Limiting rod, 122. Vertical steering assembly, 13. Connecting hose, 14. Construction handle;

[0034] 2. End steering assembly; 201. End bracket; 202. Rotary motor; 203. Transmission gear; 204. Gear ring; 205. Transmission rod; 206. End plate; 207. Positioning shaft; 208. Connecting shaft; 209. Support rod; 210. Top plate; 211. Sliding plate; 212. Connecting rod;

[0035] 3. Grouting nozzle;

[0036] 4. Pressure regulating assembly; 41. Pressure regulating connecting plate; 42. Pressure regulating ring; 421. Electrical cavity; 422. Pressure applying cavity; 43. Dividing pipe; 44. Pressure applying pipe; 45. Connector; 46. Push rod base plate; 47. Pressure applying push rod; 48. Pressure applying end; 49. Telescopic wall. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0038] This application provides a handheld grouting device.

[0039] Example 1, as Figure 1-9 As shown.

[0040] A handheld grouting device includes a bendable outer tube 1 that can be bent to accommodate grouting in various locations.

[0041] The bendable outer tube 1 includes several sub-tubes 11 and a connecting steering assembly 12, with the connecting steering assembly 12 installed between two of the sub-tubes 11.

[0042] The flexible outer tube 1 is composed of several sub-tubes 11 in conjunction with the connecting steering assembly 12, so that the flexible outer tube 1 can be bent.

[0043] The connecting steering assembly 12 includes a horizontal steering assembly 121 and a vertical steering assembly 122. The horizontal steering assembly 121 and the vertical steering assembly 122 are respectively installed at the ends of two adjacent sub-pipes 11. The movable end of the horizontal steering assembly 121 is fixedly connected to the movable end of the vertical steering assembly 122.

[0044] The horizontal and vertical rotation of the two adjacent sub-pipes 11 are controlled by the horizontal steering component 121 and the vertical steering component 122, respectively, so as to realize the bending of the entire flexible outer pipe 1. The bending can be performed at the connection of each sub-pipe 11 to adapt to the channels opened for various grouting.

[0045] The horizontal steering component 121 has the same structure as the vertical steering component 122.

[0046] The horizontal steering assembly 121 includes a base frame 1211, a U-shaped plate, a rotating shaft 1213, a steering gear 1214, a rack 1215, a mounting plate 1216, and a steering push rod 1217. The base frame 1211 is located at one end of the inner cavity of the sub-tube 11. The U-shaped plate is located on the side of the base frame 1211 away from the sub-tube 11. The rotating shaft 1213 is rotatably connected between the two ends of the U-shaped plate. The steering gear 1214 is located on one side of the rotating shaft 1213. The mounting plate 1216 is located on one side of the middle of the U-shaped plate. The steering push rod 1217 is mounted on the top surface of the mounting plate 1216. The rack 1215 is located at the output end of the steering push rod 1217, and the rack 1215 meshes with the steering gear 1214 for transmission. The middle part of the rotating shaft 1213 is fixedly connected to the vertical steering assembly 122. The steering push rod 1217 is preferably a multi-stage electric push rod from Beijing Tianyu Innovation Technology Co., Ltd. The output end of the steering push rod 1217 extends out, driving the rack 1215 to move. Through meshing with the steering gear 1214, it drives the rotating shaft 1213 to rotate, thereby driving the vertical steering assembly 122 to rotate, that is, driving the sub-tube 11 connected to the vertical steering assembly 122 to rotate horizontally.

[0047] Similarly, the output end of the steering push rod 1217 in the vertical steering assembly 122 extends, driving the sub-tube 11 of the horizontal steering assembly 121 to rotate vertically. This allows for both horizontal and vertical rotation between two adjacent sub-tubes 11, enabling the flexible outer tube 1 to bend at any angle. This allows for handheld grouting equipment to perform grouting at various angles in various scenarios. The grout delivery pipe itself is a flexible hose, passing through the inner cavity of the flexible outer tube 1 and connecting to the grouting nozzle 3 for grouting operations.

[0048] The horizontal steering assembly 121 further includes a limiting rod 1218. The limiting rod 1218 is provided at one end of the U-shaped plate near the rack 1215, and the other end of the limiting rod 1218 extends outward to form a limiting end, which is slidably connected to the rear side of the rack 1215. The limiting rod 1218 serves to limit the rack 1215, preventing the rack 1215 from disengaging from the steering gear 1214; at the same time, it can also increase the rigidity, strength, and stability of the rack 1215. When the rack 1215 drives the steering gear 1214 to rotate, the steering gear 1214 will exert a reaction force on the rack 1215. The direction of the reaction force will be at an acute angle to the length direction of the rack 1215 and will not coincide with the length direction of the rack 1215. Therefore, the rack 1215 will tend to move away from the steering gear 1214. After long-term operation, it will cause damage to the connection between the rack 1215 and the steering push rod 1217 or the connection between the steering push rod 1217 and the mounting plate 1216. The limiting rod 1218 is used to solve this problem and increase the service life of the above-mentioned structures.

[0049] The bend in the flexible outer tube 1 is covered with a connecting hose 13. This prevents debris such as soil falling into the channel from entering the inner cavity of the flexible outer tube 1.

[0050] The other end of the bendable outer tube 1 is provided with a construction handle 14.

[0051] This makes the grouting equipment easy for workers to operate. Workers can control the position and height of the grouting equipment by holding the construction handle 14.

[0052] It also includes an end steering component 2, which is installed at one end of the bendable outer pipe 1 to control the steering of the grouting nozzle 3 to adapt to the grouting situation where the channel is opened on one side of the potential hazard.

[0053] The end steering assembly 2 includes an end bracket 201, a rotating motor 202, a transmission gear 203, a gear ring 204, a transmission rod 205, an end plate 206, a positioning shaft 207, a connecting shaft 208, a support rod 209, a top plate 210, a sliding plate 211, and a connecting rod 212. The end of the bendable outer tube 1 is rotatably connected to the end plate 206. Several transmission rods 205 are arranged on the bottom surface of the end plate 206, and the gear ring 204 is arranged inside the transmission rods 205. The end bracket 201 is arranged at the end of the inner cavity of the bendable outer tube 1. The rotating motor 202 is mounted on the top surface of the end bracket 201. The output shaft of the rotating motor 202 is provided with the transmission gear 203, which meshes with the gear ring 204 for transmission. Several support rods 209 are arranged on the top surface of the end plate 206. The support rod 209 has an inclined top plate 210 on its top surface, and a sliding plate 211 is slidably connected to the top surface of the top plate 210. Both the top plate 210 and the sliding plate 211 are annular plates. A positioning shaft 207 is provided at the center of the top surface of the end bracket 201. The positioning shaft 207 extends to the upper part of the end plate 206. The top end of the positioning shaft 207 is rotatably connected to the connecting shaft 208. The connecting shaft 208 and the positioning shaft 207 are rotatably connected by a universal ball joint, allowing them to rotate in all directions. The other end of the connecting shaft 208 is connected to the grouting nozzle 3. A connecting rod 212 is provided on the top surface of the sliding plate 211, and the other end of the connecting rod 212 is fixedly connected to the connecting shaft 208. The rotating motor 202 is a forward and reverse rotating motor, preferably a vertical transmission gear 203 reduction motor from Shanghai Zhibao Motor Manufacturing Co., Ltd. The rotating motor 202 drives the end plate 206 to rotate via the transmission gear 203 meshing with the gear ring 204. This rotation, in turn, drives the top plate 210 to rotate via the support rod 209. The top plate 210 is tilted, and when it rotates, it pushes against the sliding plate 211, causing it to swing. Because the sliding plate 211 is fixed together with the connecting rod 212 and the connecting shaft 208, and the bottom end of the connecting shaft 208 is connected to the positioning shaft 207 via a universal ball joint for limiting its movement, the sliding plate 211 will swing around the positioning shaft 207 as its axis when the top plate 210 rotates.

[0054] It also includes a grouting nozzle 3, which is installed at the top of the end steering assembly 2 and connected to the grouting pipe for grouting. When the sliding plate 211 swings around, the connecting shaft 208 drives the grouting nozzle 3 to change its angle, thereby adjusting the position of the grouting nozzle 3 to achieve multi-angle grouting.

[0055] The construction handle 14 is equipped with several buttons to control the connecting steering assembly 12 and the end steering assembly 2. The connecting steering assembly 12 can turn left, right, up, and down to make the bendable outer pipe 1 bend; the end steering assembly 2 can turn forward and reverse to change the orientation of the grouting nozzle 3.

[0056] A pressure regulating component 4 is installed inside the flexible outer pipe, and the pressure regulating component 4 is installed inside the sub-pipe. It is used to regulate the pressure of the grout used for grouting.

[0057] The pressure regulating assembly 4 includes a pressure regulating connecting plate 41, a pressure regulating ring 42, a dividing pipe 43, a pressure applying pipe 44, a connector 45, a push rod base plate 46, a pressure applying push rod 47, a pressure applying end 48, and a telescopic wall 49.

[0058] Several pressure regulating rings 42 are arranged longitudinally together, preferably three, to achieve three-level pressure regulation with progressively changing pressure. Several pressure regulating connecting plates 41 are provided on the outer side of the pressure regulating rings 42 on the upper and lower sides, and the other end of the pressure regulating connecting plate 41 is fixedly connected to the inner wall of the sub-tube. The pressure regulating assembly 4 is fixed inside the sub-tube through the pressure regulating connecting plates 41.

[0059] A pressure-applying pipe 44 is provided through the center of several pressure-regulating rings 42. Both ends of the pressure-applying pipe 44 are equipped with connectors 45. A grout delivery pipe is connected to one connector 45 near the construction handle. The other connector 45 is connected to a connector 45 of another pressure-regulating component 4 via a pipe. One connector 45 of the other pressure-regulating component 4 is connected to the grouting nozzle via a pipe. This allows the grout to pass sequentially through two pressure-regulating components 4 and finally be ejected from the grouting nozzle.

[0060] Each pressure regulating ring 42 has a dividing tube 43 disposed in the middle of its inner cavity. The dividing tube 43 is concentric with the pressure regulating ring 42 and divides the inner cavity of the pressure regulating ring 42 into an electrical cavity 421 and a pressure application cavity 422. The pressure application cavity 422 is filled with a filling fluid, which is an incompressible fluid, such as special silicone oil. This allows pressure to be applied evenly to the surface of the pressure application tube 44.

[0061] Both sides of the electrical cavity 421 are vertically equipped with push rod base plates 46. A pressure push rod 47 is installed on the side of the push rod base plate 46 facing the pressure tube 44, and the output end of the pressure push rod 47 is provided with a pressure end 48. Installation grooves are formed through both sides of the dividing tube, and telescopic walls 49 are installed in the installation grooves. The telescopic walls 49 are made of a high-strength, high-elasticity special rubber material, such as hydrogenated nitrile rubber. When the pressure push rod 47 extends, it drives the pressure end 48 to press against the telescopic wall 49, pushing the telescopic wall 49 towards the pressure tube 44, thereby compressing the space of the pressure cavity 422. Through the filling liquid inside, pressure is evenly applied to the surface of the pressure tube 44.

[0062] A sensor is installed between the pressure-applying end 48 and the output end of the pressure-applying push rod 47 to detect the magnitude of the reaction force from the telescopic wall 49 after the pressure-applying end 48 extends.

[0063] The pressure regulating component 4 is provided in two sets. By applying pressure at different levels, it reduces cavities, air bubbles, or discontinuities within the grout that are often invisible to the naked eye. Simultaneously, if the sensor detects excessive pressure within the grout, the pressure can be reduced during subsequent pressure regulation to bring the grout pressure to a suitable level. Furthermore, to ensure smooth grouting, the pressure regulating component 4, located near the grouting nozzle, automatically increases the applied pressure when the sensor detects increased resistance; that is, the pressure push rod 47 extends further to ensure continuous grouting. When the resistance decreases, it automatically reduces the pressure to prevent grout splashing. This allows the grout to smoothly and continuously fill the entire cavity with optimal pressure, increasing the grout fullness and density to over 99%, effectively eliminating cavities and air bubbles.

[0064] When using this invention:

[0065] The workers first determine the grouting location, and then, based on the site conditions, adjust the bends of each sub-pipe of the grouting equipment to ensure that the grout can be precisely injected into the designated location.

[0066] Holding the construction handle, adjust the horizontal and vertical steering components according to the grouting location to adjust the horizontal and vertical angles between adjacent sub-pipes, gradually bending the flexible outer pipe into the desired shape. Finally, adjust the direction of the grouting nozzle using the end steering component. At this point, the overall shape adjustment of the grouting equipment is complete.

[0067] The grout delivery system is activated. The grout delivery pipe passes through the flexible outer pipe and enters the pressure regulating component, ultimately delivering it to the grouting nozzle. The worker holds the handle, aims the nozzle at the area to be grouted, and performs the jet grouting operation.

[0068] During the grouting process, if it is necessary to adjust the pressure of the grout, the pressure regulating component can be used to control the movement of the pressure applying push rod and the pressure applying end head. The pressure can be applied or reduced by the deformation of the telescopic wall.

[0069] It should be noted that, in this document, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0070] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims. It should be understood that this application is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A handheld grouting device, characterized in that: Includes a flexible outer tube; An end-steering assembly is installed at one end of the flexible outer tube; A grouting nozzle is mounted on top of the end deflector assembly.

2. The handheld grouting device according to claim 1, characterized in that: The bendable outer tube includes several sub-tubes and a connecting steering assembly, with the connecting steering assembly installed between two of the sub-tubes.

3. The handheld grouting device according to claim 2, characterized in that: The connecting steering assembly includes a horizontal steering assembly and a vertical steering assembly. The horizontal steering assembly and the vertical steering assembly are respectively installed at the ends of two adjacent sub-tubes. The movable end of the horizontal steering assembly is fixedly connected to the movable end of the vertical steering assembly.

4. The handheld grouting device according to claim 3, characterized in that: The horizontal steering assembly has the same structure as the vertical steering assembly.

5. A handheld grouting device according to claim 3, characterized in that: The horizontal steering assembly includes a base frame, a U-shaped plate, a rotating shaft, a steering gear, a rack, a mounting plate, and a steering push rod. The base frame is located at one end of the inner cavity of the sub-tube, and the U-shaped plate is located on the side of the base frame away from the sub-tube. The rotating shaft is rotatably connected between the two ends of the U-shaped plate, and the steering gear is located on one side of the rotating shaft. The mounting plate is located on one side of the middle of the U-shaped plate, and the steering push rod is mounted on the top surface of the mounting plate. The rack is located at the output end of the steering push rod, and the rack meshes with the steering gear for transmission. The middle part of the rotating shaft is fixedly connected to the vertical steering assembly.

6. A handheld grouting device according to claim 5, characterized in that: The horizontal steering assembly also includes a limiting rod, with the limiting rod provided at one end of the U-shaped plate near the rack, and the other end of the limiting rod extending outward to a limiting end, which is slidably connected to the rear side of the rack.

7. A handheld grouting device according to claim 1, characterized in that: The bends of the flexible outer tube are covered with connecting hoses.

8. A handheld grouting device according to claim 1, characterized in that: The other end of the bendable outer tube is equipped with a construction handle.

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