A grouting device and device set suitable for trenchless pipeline repair
By designing a grouting device suitable for trenchless pipeline repair, and adopting a grouting device with threaded fit and hot-melt connection, the problems of inconvenient movement of the grouting head and flow rate adjustment were solved, achieving efficient and safe pipeline repair results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU MUNICIPAL ENG MASCH CO
- Filing Date
- 2025-07-09
- Publication Date
- 2026-06-05
AI Technical Summary
In existing trenchless pipeline repair technologies, the grouting head is not easy to move, the grout flow rate cannot be adjusted inside the pipeline, and the grouting head cannot be left in place after being removed, which affects construction efficiency and cost.
A grouting device was designed, including a grouting pump, a grouting pipe, a grouting gun head, and grouting nails. The device uses threaded fit and hot-melt connection, combined with stainless steel clamps, to achieve convenient assembly and disassembly and sealed connection. The grouting nails are placed inside the pipe for reinforcement, and the flow rate can be manually adjusted inside the pipe.
It achieves convenient assembly and disassembly of the grouting device and ensures sealing, reduces construction costs, improves construction efficiency and safety, is suitable for trenchless pipeline repair, and reduces environmental impact.
Smart Images
Figure CN224326875U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to trenchless pipeline repair construction technology, specifically to a grouting device suitable for trenchless pipeline repair, and also includes a grouting device assembly suitable for trenchless pipeline repair. Background Technology
[0002] With the acceleration of urbanization, urban underground space is becoming increasingly important. However, traditional excavation methods not only cause environmental pollution but also severely impact urban infrastructure such as transportation, communication, and water supply systems. Therefore, the development of trenchless technologies is receiving increasing attention.
[0003] my country's trenchless technology started late and has a small market share. Although the trenchless industry has been around for more than ten years, and most construction companies have experienced long project construction periods, the promotion of trenchless repair methods has been difficult because the materials used in the past were entirely imported, resulting in high repair costs. However, my country's trenchless material production has matured, and trenchless technology is gradually gaining attention in the industry.
[0004] In recent years, trenchless technology has been applied in industries closely related to underground pipelines, such as municipal engineering, gas, telecommunications, and power. Urban water supply and drainage pipelines are essential infrastructure in modern cities, serving as the backbone of urban water supply, water pollution control, and urban drainage management. With the continuous improvement of urban construction, underground pipeline management departments are increasingly inclined to use trenchless pipeline technology. Due to the unpredictability of urban development, the complexity of pipeline networks and roads, and the influence of factors such as pipe material quality, construction technology level, underground environment, and transported media, comprehensive excavation and replacement of buried pipelines is often impossible to resolve in a short period, and can also damage urban roads, causing environmental pollution and traffic congestion. To ensure that newly paved roads are not excavated during urban construction, various cities have formulated corresponding regulations. For example, the "Guangzhou Municipal Underground Pipeline Management Measures" explicitly stipulates that "underground pipeline construction units shall not excavate roads to lay underground pipelines within five years after the completion of newly built, reconstructed, or expanded urban roads." This also means that if pipeline problems occur during this period, trenchless repair projects will be the only option.
[0005] In existing technologies, a relatively long steel tubular grouting head is generally used, which needs to be removed and restored to its original state after grouting. The steel tubular grouting head is directly connected to the grouting pipe, which is connected to the grouting pump. Under the action of the grouting pump, the grout is injected into the soil layer along the grouting pipe and the grouting head. This structure does not consider ease of movement, adjustable grout levels within the pipe, or the issue of leaving the grouting head in place. Utility Model Content
[0006] In view of the technical problems existing in the prior art, the purpose of this utility model is to provide a grouting device suitable for trenchless pipeline repair, which is easy to install, disassemble and move.
[0007] Another objective of this invention is to provide a grouting device assembly suitable for trenchless pipeline repair, specifically designed for trenchless pipeline repair.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] A grouting device suitable for trenchless pipeline repair includes a grouting pump, a grouting pipe, a grouting gun head, and grouting nails arranged sequentially along the grout flow direction. The grouting gun head includes a front connecting section, a flow regulating section, and a rear connecting section arranged sequentially from front to back. The front connecting section is sealed to the rear end of the grouting nail, and the rear connecting section is sealed to the grouting pipe. The front end of the grouting nail is the grout outlet, and the front section of the grouting nail is a retention part that is retained for a long time after grouting.
[0010] As a preferred embodiment, the grouting nail has a grouting channel that runs through the front and back, the front section of the connecting section has an installation hole, and the rear end of the grouting nail is fitted with a rubber water-stop sealing ring before being inserted into the installation hole.
[0011] As a preferred embodiment, the grouting nail has a grouting channel that runs through the front and back. The rear end of the grouting nail is an external thread section, and the front end of the front connecting section is an internal thread section. The external thread section and the internal thread section cooperate with each other.
[0012] As a preferred embodiment, the grouting gun head has a grouting channel that runs through the front and back, and the flow adjustment section has a handle for adjusting the flow rate, which is used to adjust the opening of the grouting channel.
[0013] As a preferred embodiment, in the grouting gun head, the rear end of the connecting section is an external thread section, and the grouting pipe is tightened to this external thread section by heat fusion.
[0014] As a preferred option, stainless steel clamps are installed at the joint between the grouting pipe and the subsequent connecting section.
[0015] As a preferred option, the grouting pipe is a PVC pipe.
[0016] As a preferred option, the grouting pump is installed on the ground surface.
[0017] As a preferred embodiment, the grouting nail includes a first retention section located outside the pipe and a second retention section located inside the pipe wall.
[0018] A grouting device assembly for trenchless pipeline repair includes a grouting device for trenchless pipeline repair, a drill for drilling holes in the pipeline for grouting nails to pass through, and a cutting device for cutting the grouting nails.
[0019] This utility model has the following advantages:
[0020] 1. It consists of a grouting pump, grouting pipe, grouting gun head, and grouting nails. It is easy to assemble and disassemble, easy to transport, and can be assembled on site.
[0021] 2. The grouting structure is designed as an assembled structure combining the grouting gun head and the grouting nail. After the grouting nail is subsequently cut and destroyed, the grouting gun head can still be reused.
[0022] 3. The design of the grouting nail is simple in structure and easy to operate.
[0023] 4. The grouting gun head is used as a switch and for flow adjustment, allowing manual adjustment of the grouting flow inside the pipeline without the need to adjust the grouting pump on the ground, making it easy to control the grouting quality in real time.
[0024] 5. The sealed connection prevents grout leakage.
[0025] 6. The connection is made by threaded fitting and heat fusion, ensuring a reliable connection and preventing grout leakage. Furthermore, stainless steel clamps are used to increase connection strength and sealing.
[0026] 7. Grouting nails are used to repair the soil layer outside the pipeline without excavation. This method can accurately reinforce the soil outside the collapsed part of the pipeline, making the soil around the collapsed part more stable.
[0027] 8. Using this device for grouting reinforcement does not affect the pipeline structure, can effectively reduce construction costs, improve work efficiency, reduce safety risks, and is suitable for trenchless pipeline repair operations. Attached Figure Description
[0028] Figure 1 This is the front view of the grouting device.
[0029] Figure 2 This is a top view of the grouting device.
[0030] Figure 3 This is a schematic diagram of the grouting nail structure.
[0031] Figure 4 This is a schematic diagram of the grouting gun head.
[0032] Figure 5 This is a diagram illustrating the use of a grouting device.
[0033] 1-Grouting nail, 2-Grouting gun head, 3-Stainless steel clamp, 4-Grouting pipe, 5-Rubber water-stop sealing ring, 6-Grouting outlet, 7-Front connection section, 8-Flow regulation section, 9-Rear connection section, 10-Pipeline. Detailed Implementation
[0034] The present invention will be further described in detail below with reference to specific embodiments.
[0035] Example 1
[0036] A grouting device suitable for trenchless pipeline repair includes a grouting pump, a grouting pipe, a grouting gun head, and grouting nails arranged sequentially along the grout flow direction. The grouting gun head includes a front connecting section, a flow regulating section, and a rear connecting section arranged sequentially from front to back. The front connecting section is sealed to the rear end of the grouting nail, and the rear connecting section is sealed to the grouting pipe. The front end of the grouting nail is the grout outlet, and the front section of the grouting nail is a retention part that is retained for a long time after grouting.
[0037] The grouting nail has a through-hole grouting channel inside, and an installation hole is provided at the front of the connecting section. A rubber water-stop sealing ring is installed at the rear of the grouting nail before it is inserted into the installation hole. In this embodiment, the rubber water-stop sealing ring is fitted over the rear end of the grouting nail before the entire assembly is inserted into the installation hole, achieving a tight connection between the grouting nail and the grouting gun head, effectively preventing grout leakage.
[0038] The grouting gun head has a through-flow grouting channel inside, and a flow adjustment section has a handle for adjusting the flow rate. The opening of the grouting channel can be adjusted by using the handle. In this embodiment, the handle allows for manual adjustment of the grout flow rate and on / off state within the pipe.
[0039] In the grouting gun head, the rear end of the connecting section is an external thread section, and the grouting pipe is tightened to this external thread section by heat fusion.
[0040] Stainless steel clamps are installed outside the joint between the grouting pipe and the subsequent connecting section. In this embodiment, the stainless steel clamps further tighten the grouting pipe and the subsequent connecting section.
[0041] The grouting pipe is a PVC pipe.
[0042] The grouting pump is located on the ground surface. In this embodiment, the grout is injected using the grouting pump.
[0043] In grouting nails, the retention section includes a first retention section located outside the pipe and a second retention section located inside the pipe wall.
[0044] Example 2
[0045] The grouting nail has a through-hole grouting channel inside. The rear end of the grouting nail is an external threaded section, and the front end of the connecting section is an internal threaded section. The external threaded section and the internal threaded section cooperate with each other. In this embodiment, the external threaded section is inserted into the internal threaded section to achieve a tight connection between the grouting nail and the grouting gun head, effectively preventing grout leakage.
[0046] The parts not mentioned in this embodiment are the same as in Embodiment 1.
[0047] Example 3
[0048] A grouting device assembly suitable for trenchless pipeline repair includes a grouting device suitable for trenchless pipeline repair as described in Embodiment 1, a drill bit for drilling holes in the pipeline for grouting nails to pass through, and a cutting device for cutting the grouting nails.
[0049] The parts not mentioned in this embodiment are the same as in Embodiment 1.
[0050] The operation method is as follows:
[0051] 1) Observe the location of the collapsed or cracked area of the pipeline using CCTV pipeline endoscopic inspection technology, and then insert grouting nails after drilling holes in the pipeline area that needs grouting reinforcement and sealing.
[0052] 2) The grouting pipe is pre-screwed into the external thread section at the rear end of the grouting gun head using hot-melt welding. A stainless steel clamp is installed on the outer ring of the connection between the grouting pipe and the grouting gun head to increase the overall integrity of the connection.
[0053] 3) Align the front end of the grouting gun head with the grouting nail, and insert the rubber water-stop sealing ring at the rear end of the grouting nail into the top of the grouting gun head for a tight connection.
[0054] 4) Using a grouting pump located on the ground surface, cement grout is pumped into the reinforcement and repair area outside the pipe through the grouting pipe, grouting gun head, and grouting nails. After grouting is completed, the grouting gun head is pulled out, and the exposed grouting nail parts inside and outside the pipe are cut off using cutting equipment.
[0055] This invention is used for trenchless pipeline repair. It employs the principle of grouting inside the pipe to fill and reinforce the voids in the surrounding soil, eliminating the need for road excavation and reducing the impact on the surrounding environment. It enables rapid trenchless pipeline repair, significantly improves repair quality, and reduces rework rates.
[0056] This utility model features convenient installation and disassembly, and can be flexibly assembled by selecting different specifications of grouting nails and grouting pipes according to the actual site environment. It is energy-saving and environmentally friendly, with standardized accessories, which can significantly improve work efficiency and safety.
[0057] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.
Claims
1. A grouting device suitable for trenchless pipeline repair, characterized in that: It includes a grouting pump, grouting pipe, grouting gun head, and grouting nail arranged sequentially along the grout flow direction; the grouting gun head includes a front connecting section, a flow regulating section, and a rear connecting section arranged sequentially from front to back, the front connecting section and the rear end of the grouting nail are sealed together, and the rear connecting section and the grouting pipe are sealed together; the front end of the grouting nail is the grout outlet, and the front section of the grouting nail is the retention part that is retained for a long time after grouting.
2. A grouting device for trenchless pipeline repair according to claim 1, characterized in that: The grouting nail has a grouting channel running through it from front to back. The front section of the connecting section has an installation hole, and the rear end of the grouting nail is fitted with a rubber water-stop sealing ring before being inserted into the installation hole.
3. A grouting device suitable for trenchless pipeline repair according to claim 1, characterized in that: The grouting nail has a grouting channel that runs through it from front to back. The rear end of the grouting nail is an external thread section, and the front end of the connecting section is an internal thread section. The external thread section and the internal thread section cooperate with each other.
4. A grouting device suitable for trenchless pipeline repair according to claim 1, characterized in that: The grouting gun head has a grouting channel running through it from front to back. The flow rate adjustment section has a handle for adjusting the flow rate, and the opening of the grouting channel can be adjusted by using the handle.
5. A grouting device for trenchless pipeline repair according to claim 1, characterized in that: In the grouting gun head, the rear end of the connecting section is an external thread section, and the grouting pipe is tightened to this external thread section by heat fusion.
6. A grouting device for trenchless pipeline repair according to claim 5, characterized in that: Stainless steel clamps are installed at the outside of the sleeve position of the grouting pipe and the subsequent connecting section.
7. A grouting device for trenchless pipeline repair according to claim 5, characterized in that: The grouting pipe is a PVC pipe.
8. A grouting device for trenchless pipeline repair according to claim 1, characterized in that: The grouting pump is located on the ground surface.
9. A grouting device for trenchless pipeline repair according to claim 1, characterized in that: In grouting nails, the retention section includes a first retention section located outside the pipe and a second retention section located inside the pipe wall.
10. A grouting device assembly suitable for trenchless pipeline repair, characterized in that: The invention includes a grouting device for trenchless pipeline repair according to any one of claims 1 to 9, and further includes a drill for perforating the pipeline for grouting nails to pass through, and a cutting device for cutting the grouting nails.