Jetting machine for recoverable cement paste

Abstract

This utility model discloses a rotary jet grouting machine for recycling cement slurry, including a main body of the rotary jet grouting machine, a drill rod, and a recycling device. The recycling device includes a receiving component and a recycling pipe. The receiving component has a return cement slurry inlet and a return cement slurry outlet, with the return cement slurry outlet connected to the recycling pipe. The receiving component includes a collecting element and a receiving funnel connected to the collecting element. The inlet of the collecting element is the return cement slurry inlet, and the bottom outlet of the receiving funnel is the return cement slurry outlet. In use, the inlet of the collecting element extends into a set position in the borehole. This utility model adopts a structure in which a recycling device is set at the opening of the borehole, which can solve the problem of waste and pollution caused by a large amount of cement slurry overflow during rotary jet grouting operations, improve the reuse rate of cement slurry, and enable borehole formation and recycling to be carried out simultaneously. At the same time, it reduces the difficulty of manual operation and construction costs, and achieves the construction goals of green construction, energy conservation and emission reduction.

Description

Technical Field

[0001] This utility model relates to the field of building construction engineering, and in particular to a rotary jet grouting machine that can recycle cement slurry. Background Technology

[0002] Jet grouting machinery can effectively improve the stability of slope structures and ensure the safety of subsequent construction through jet grouting anchor cable technology. However, in actual operation, jet grouting machinery is limited by the characteristics of the construction process and the way materials are used. For example, jet grouting requires continuous high-pressure injection of cement slurry, and a large amount of cement slurry overflows from the hole opening before it fully participates in the consolidation of the hole wall. This not only causes serious waste of cement raw materials and increases construction costs, but the overflowing cement slurry also flows randomly on the work surface, polluting the ground environment. Afterwards, additional manpower and time are required for cleanup, affecting construction efficiency. At the same time, traditional jet grouting machinery is not equipped with a dedicated cement slurry recycling device, and the overflowing cement slurry cannot be recycled, making it difficult to achieve the environmental protection concept of green construction, energy conservation and emission reduction. Therefore, it has promoted the development of jet grouting machinery.

[0003] Existing rotary grouting machinery mainly relies on a simple high-pressure jetting process for hole formation, without integrating a cement slurry recycling system. This has several shortcomings, such as the lack of an effective receiving and guiding mechanism, resulting in irregular diffusion of overflowing cement slurry from the orifice, making it impossible to collect. Some cement slurry seeps into the soil or remains in the cracks of the work surface, making it difficult to recycle and polluting the construction environment. Furthermore, there is no established recycling pathway for cement slurry; there is no dedicated transport channel between the overflowing cement slurry and the mixing tank. Even if a small amount of cement slurry is collected manually, the lack of a standardized return path makes it difficult to reuse in rotary grouting operations, resulting in extremely low recycling rates. The traditional rotary grouting machinery's workflow is disconnected from material recycling needs. The location of cement slurry recycling structures is not pre-designed before construction, and hole formation and recycling operations cannot be performed simultaneously during construction, requiring an additional recycling step, which not only extends the construction period but also increases labor costs.

[0004] Therefore, it is necessary to improve the structure of existing jet grouting machinery. This will not only solve the waste and pollution caused by the large amount of cement slurry overflowing during jet grouting operations and improve the reuse rate of cement slurry, but also enhance the adaptability and durability of the recycling device to jet grouting operations, enabling simultaneous hole formation and recycling. At the same time, it will reduce the difficulty of manual operation and construction costs, and achieve the construction goals of green construction, energy conservation and emission reduction while ensuring the quality and efficiency of slope support construction. Utility Model Content

[0005] In view of the shortcomings of current rotary grouting machinery, the purpose of this utility model is to provide a rotary grouting machine that can recycle cement slurry. This machine can not only solve the problem of waste and pollution caused by the large amount of cement slurry overflow during rotary grouting operations and improve the reuse rate of cement slurry, but also enhance the adaptability and durability of the recycling device to the rotary grouting operation, realize the simultaneous operation of hole formation and recycling, and reduce the difficulty of manual operation and construction costs. On the basis of ensuring the quality and efficiency of slope support construction, it can achieve the construction goals of green construction, energy conservation and emission reduction.

[0006] This utility model discloses a rotary jet grouting machine for recovering cement slurry, comprising a rotary jet grouting machine body, a drill rod, and a recovery device. The recovery device includes a receiving component and a recovery pipe. The receiving component has a return cement slurry inlet and a return cement slurry outlet. In use, the return cement slurry inlet is placed in the borehole to recover the cement slurry flowing out of the borehole, and the return cement slurry outlet is connected to the recovery pipe.

[0007] Furthermore, the receiving component includes a collecting element and a receiving funnel connected to the collecting element. The reflux cement slurry inlet is located in the collecting element, and the reflux cement slurry outlet is located at the bottom of the receiving funnel. In use, the reflux cement slurry inlet extends into the borehole to receive the refluxed cement slurry.

[0008] Furthermore, the collecting component has a funnel-shaped structure, including a large end and a small end. The reflux cement slurry inlet is located at the small end, and the open portion of the receiving funnel is fixedly connected to the lower part of the large end.

[0009] Furthermore, the collecting component and the receiving funnel are integrally formed.

[0010] Furthermore, the collecting component is movably fitted onto the drill rod, with the small end extending into the borehole to form a straight pipe section. The inner circle of the straight pipe section has a set distance from the drill rod for the passage of backflow cement slurry. In use, the straight pipe section extends into the borehole and its outer circle contacts the borehole wall.

[0011] Furthermore, the larger end of the collecting component is closed and has a through hole for the drill rod to pass through.

[0012] Furthermore, the recycling pipe is sealed to the reflux cement slurry outlet of the receiving funnel and extends downward at an angle from the reflux cement slurry outlet.

[0013] Furthermore, the recycling pipeline is connected to the cement slurry storage tank of the jet grouting machine.

[0014] Furthermore, the collecting component is installed on the main body of the rotary jet grouting machine, and its position is adjustable along the extension direction of the drill rod.

[0015] Furthermore, the collecting component and the receiving funnel are prefabricated stainless steel components.

[0016] The beneficial effects of this utility model are as follows: The rotary jet grouting machine of this utility model is designed to recycle cement slurry. It adopts a structure in which a recycling device is set at the opening of the borehole. This can solve the problem of waste and pollution caused by a large amount of cement slurry overflowing during the rotary jet grouting operation, and improve the reuse rate of cement slurry. The structure design enables the drilling and recycling to be carried out simultaneously, while reducing the difficulty of manual operation and construction costs, and achieving the construction goals of green construction, energy saving and emission reduction. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the structure of the rotary jet grouting machine for recyclable cement slurry according to this utility model;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0020] Reference numerals in the attached drawings: 1. Main body of the jet grouting machine; 2. Drill rod; 3. Receiving component; 301. Collection component; 301a. Straight pipe section; 302. Receiving funnel; 4. Recovery pipe; 5. Drill hole; 6. Cement slurry storage tank; 7. Adjustment mechanism. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0022] This utility model discloses a rotary jet grouting machine capable of recovering cement slurry, including a main body 1, a drill rod 2, and a recovery device. The recovery device includes a receiving component 3 and a recovery pipe 4. The receiving component 3 has a return cement slurry inlet and a return cement slurry outlet. In use, the return cement slurry inlet is placed in the borehole 5 to recover the cement slurry flowing out of the borehole, and the return cement slurry outlet is connected to the recovery pipe 4. The rotary jet grouting machine is a type of existing mechanical equipment that simultaneously jets cement slurry while drilling a hole with a drill rod. The structure of the receiving component is not limited here, as long as it has a cavity capable of receiving cement slurry and allowing the received cement slurry to flow smoothly to the return cement slurry outlet and be transported to a designated location through the recovery pipe 4, such as the cement slurry pool of the rotary jet grouting machine, etc., which will not be described in detail here.

[0023] The cement slurry overflowing during the jet grouting process is recovered through the receiving component 3 and the recovery pipe 4. The recovered cement slurry can be reused, reducing cement slurry waste and lowering the cost of engineering materials. It also prevents a large amount of cement slurry from overflowing from the orifice into the foundation pit and other construction sites, reducing the pollution of the construction environment by cement slurry. It also reduces the amount and difficulty of handling waste cement slurry after construction, which is in line with the concept of green construction and saves manpower and time costs. Further details will not be elaborated here.

[0024] In this embodiment, the receiving component 3 includes a collecting element 301 and a receiving funnel 302 communicating with the collecting element 301. The reflux cement slurry inlet is located in the collecting element 301, and the reflux cement slurry outlet is located at the bottom of the receiving funnel 302. In use, the reflux cement slurry inlet extends into the borehole 5 to receive the refluxed cement slurry. Of course, the reflux cement slurry inlet should fit snugly against the borehole wall of the borehole 5 to ensure sufficient reception of the refluxed mud. The outer diameter of the reflux cement slurry inlet is generally designed to correspond to the model of the drill rod 2 to ensure compatibility with the borehole wall of the borehole 5, which will not be elaborated further here.

[0025] In this embodiment, the collecting component 301 has a funnel-shaped structure, including a large end and a small end. The reflux cement slurry inlet is located at the small end, and the open portion of the receiving funnel 302 is fixedly connected to the lower part of the large end. The receiving funnel 302 having an open portion is a general structural feature of a funnel, and will not be described in detail here.

[0026] The collecting component 301 and the receiving funnel 302 form a double convergence. After the cement slurry flows out from the bottom of the large end of the collecting component 301, it enters the large end of the receiving funnel 302 and then flows to the small end of the receiving funnel 302. The entire flow path is smooth, without sudden changes in pipe diameter or dead angles, thus eliminating the problem of blockage.

[0027] In this embodiment, the collecting component 301 and the receiving funnel 302 are integrally formed structures, which can be made of rigid plastic or metal materials. The integrally formed structure has good integrity and is easy to use.

[0028] The one-piece molded structure eliminates splicing gaps, avoiding the cement slurry leakage problem caused by loose connection between the collection component 301 and the receiving funnel 302 in traditional split designs. The one-piece molded structure, manufactured through injection molding or casting processes, has stronger overall rigidity and can withstand external forces such as cement slurry impact or drill rod 2 vibration during construction. It is less prone to problems such as loose interfaces or component breakage as in split structures, reducing the use of connecting parts. During construction and installation, it is only necessary to connect the one-piece molded receiving component 3 to the drill rod 2 and the recovery pipe 4 as a whole, reducing installation steps and saving on-site construction time.

[0029] In this embodiment, the collecting component 301 is movably fitted onto the drill rod 2, with its small end extending into the borehole to form a straight pipe section 301a. The inner circle of the straight pipe section 301 has a set distance from the drill rod 2 for the passage of backflowing cement slurry. In use, the straight pipe section 301a extends into the borehole 5, with its outer circle contacting the borehole wall. This adaptable structure has different straight pipe sections 301a depending on the shape of the drill rod; for example... Figure 1 and 2As shown, after the straight pipe section 301a extends into the borehole, the conical surface of the conical section (funnel structure) of the collecting component 301 abuts against the opening of the borehole, forming a relative seal and achieving a better collection effect.

[0030] The straight pipe section 301a in this embodiment is about 10cm long, which effectively prevents it from overflowing or leaking at the orifice, improving the cement slurry recovery rate. The structure of the collection component 301 connected to the receiving funnel 302 enables precise collection at the front end and centralized diversion at the rear end, reducing cement slurry residue during the transfer process and ensuring more thorough collection. The bottom outlet of the receiving funnel 302 is connected to the recovery pipe 4. The conical structure of the funnel has the functions of diversion and convergence, which can prevent cement slurry from accumulating and blocking at the outlet, ensuring smooth flow of cement slurry in the recovery pipe 4, and also buffering the impact force of falling cement slurry, reducing wear on the recovery pipe 4, and extending the service life of the recovery device.

[0031] In this embodiment, the large end of the collecting component 301 is closed and has a through hole for the drill rod 2 to pass through, which helps to maintain the directional integrity of the structure.

[0032] In this embodiment, the recycling pipe 4 is sealed to the reflux cement slurry outlet of the receiving funnel 302 and extends downward at an angle from the reflux cement slurry outlet; as shown in the figure, the reflux cement slurry outlet forms a downward-extending short section, and the reflux pipe is connected to this short section to form a connection, which is a typical connection structure and will not be described in detail here.

[0033] In this embodiment, the cement slurry outlet direction of the recovery pipe 4 is inclined downward at a set angle. The downwardly inclined recovery pipe 4 can utilize the gravitational potential energy of the cement slurry itself to provide power for the flow of the cement slurry. It can accelerate the flow rate of the cement slurry in the recovery pipe 4 without relying on additional pressurization equipment. Cement slurry usually contains solid particles. Horizontal pipes are prone to particle sedimentation, which can lead to accumulation and blockage at the bottom of the recovery pipe 4. The downwardly inclined design allows solid particles to flow with the cement slurry towards the outlet direction of the recovery pipe 4, reducing the risk of sedimentation. The inclined design also allows the cement slurry to flow naturally to the external storage tank, reducing the number of bends in the recovery pipe 4, reducing flow resistance, and also reducing the risk of local blockage caused by bends in the recovery pipe 4. Typically, the cement slurry outlet direction of the recovery pipe 4 is at an angle of 25°-35° to the horizontal plane where the small end of the receiving funnel 302 is located, which will not be elaborated further here.

[0034] In this embodiment, the recycling pipe 4 is connected to the cement slurry storage tank 6 of the jet grouting machine for direct recycling. The location of the jet grouting borehole is generally a sandy soil structure, and the returned cement slurry will contain sand. This sand can be directly used as a component of the cement slurry. If the proportion is too high, it can be remixed and re-proportioned. This will not be elaborated further here.

[0035] In this embodiment, the collecting component 301 is installed on the main body 1 of the rotary jet grouting machine, and its position is adjustable along the extension direction of the drill rod 2. As shown in the figure, the collecting component 301 is detachably installed on the main body 1 of the rotary jet grouting machine via the adjusting mechanism 7. The adjusting mechanism 7 can be formed by a simple mechanical structure, such as a mounting base and a connecting plate. The connecting plate can slide on the mounting base with a single degree of freedom (by forming track grooves on both sides of the connecting plate to accommodate the sides of the mounting base, and vice versa). The mounting base is provided with multiple connecting holes along the drilling direction of the drill rod. The position can be adjusted by inserting and removing pins through different connecting holes. Different positions can be installed by inserting and removing pins, so that the position is adjustable to ensure good sealing of the borehole opening by the collecting component.

[0036] In this embodiment, both the collecting component 301 and the receiving funnel 302 are prefabricated stainless steel components. The stainless steel material allows for long-term recycling and is economical. The prefabricated stainless steel components can be mass-produced using standardized molds, ensuring high dimensional accuracy and a tight fit between the collecting component 301 and the receiving funnel 302. This avoids leakage problems caused by dimensional deviations. Furthermore, no secondary cutting or welding is required on-site, allowing for direct and rapid assembly, shortening construction preparation time and improving overall installation efficiency.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rotary jet grouting machine for recycling cement slurry, characterized in that: The device includes a rotary jet grouting machine body, a drill rod, and a recovery device. The recovery device includes a receiving component and a recovery pipeline. The receiving component has a return cement slurry inlet and a return cement slurry outlet. In use, the return cement slurry inlet is placed in the borehole to recover the cement slurry flowing out of the borehole, and the return cement slurry outlet is connected to the recovery pipeline.

2. The rotary jet grouting machine for recyclable cement slurry according to claim 1, characterized in that: The receiving component includes a collecting element and a receiving funnel connected to the collecting element. The reflux cement slurry inlet is located at the collecting element, and the reflux cement slurry outlet is located at the bottom of the receiving funnel. In use, the reflux cement slurry inlet extends into the borehole to receive the refluxed cement slurry.

3. The rotary jet grouting machine for recyclable cement slurry according to claim 2, characterized in that: The collecting component has a funnel-shaped structure, including a large end and a small end. The return cement slurry inlet is located at the small end, and the open part of the receiving funnel is fixedly connected to the lower part of the large end.

4. The rotary jet grouting machine for recyclable cement slurry according to claim 3, characterized in that: The collecting component and the receiving funnel are integrally formed.

5. The rotary jet grouting machine for recyclable cement slurry according to claim 2, characterized in that: The collecting component is movably fitted onto the drill rod, with the small end extending into the borehole to form a straight pipe section. The inner circle of the straight pipe section has a set distance from the drill rod for the passage of backflow cement slurry. In use, the straight pipe section extends into the borehole and its outer circle contacts the borehole wall.

6. The rotary jet grouting machine for recyclable cement slurry according to claim 2, characterized in that: The large end of the collector is closed and has a through hole for the drill rod to pass through.

7. The rotary jet grouting machine for recyclable cement slurry according to claim 2, characterized in that: The recovery pipe is sealed to the return cement slurry outlet of the receiving funnel and extends downward at an angle from the return cement slurry outlet.

8. The rotary jet grouting machine for recyclable cement slurry according to claim 4, characterized in that: The recovery pipeline is connected to the cement slurry storage tank of the jet grouting machine.

9. The rotary jet grouting machine for recyclable cement slurry according to claim 2, characterized in that: The collecting component is installed on the main body of the rotary jet grouting machine and its position is adjustable along the extension direction of the drill rod.

10. The rotary jet grouting machine for recyclable cement slurry according to claim 5, characterized in that: The collecting component and receiving funnel are prefabricated stainless steel components.

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