Anti-backflow mechanism of cement grouting machine

Abstract

The utility model discloses an anti-backflow mechanism of a cement grouting machine, which comprises a grouting pipe, the top of the grouting pipe is fixedly communicated with a hopper, the front side of the grouting pipe is fixedly communicated with a discharge nozzle, the rear side of the grouting pipe is provided with a power end, and the front side of the grouting pipe is provided with an anti-backflow pipe. An anti-backflow mechanism is arranged in the anti-backflow pipe, and the rear side of the anti-backflow pipe fixedly communicates with a connecting pipe; the anti-backflow mechanism comprises a check ring, a plurality of elastic pieces, an anti-backflow plate and three sealing rings, and solves the problems that anti-backflow devices of part of existing cement grouters are simple in structural design, poor in sealing performance, difficult to effectively prevent cement grout from flowing back under complex working conditions, inconvenient to disassemble and clean independently after being used, inconvenient to clean and the like. And under long-term erosion of cement grout, sealing parts are easy to damage, the service life is short, and great inconvenience is brought to construction due to frequent maintenance and replacement of the parts.

Description

Technical Field

[0001] This utility model relates to the field of cement grouting, and in particular to a backflow prevention mechanism for cement grouting machines. Background Technology

[0002] Cement grouting machines are widely used mechanical equipment in engineering fields such as construction, water conservancy, and transportation. They are mainly used to inject cement grout or other similar cement slurry into specific spaces to achieve functions such as reinforcement and sealing.

[0003] Currently, Chinese patent CN215631723U discloses an intelligent cement column grouting machine. This utility model uses a mobile cart as a carrier to increase the flexibility of the equipment, and integrates cameras, sensors and other devices to strictly monitor and control the grouting process. It can accurately judge the completion status of grouting and automatically stop grouting, thereby improving the grouting quality. At the same time, it can save labor costs, is simple to operate, has a high degree of intelligence, good mechanical performance, and is flexible and convenient to move.

[0004] After searching for cement grouting machines, the applicant found the following problems: The anti-backflow device of some existing cement grouting machines has a simple structural design and poor sealing performance. It is difficult to effectively prevent the backflow of cement grout under complex working conditions. Furthermore, it is inconvenient to disassemble and clean it separately after use. Under long-term corrosion of cement grout, the sealing components are easily damaged and have a short service life. Frequent maintenance and replacement of parts bring great inconvenience to construction. Utility Model Content

[0005] The main purpose of this utility model is to provide a backflow prevention mechanism for cement grouting machines. It aims to solve the problems of existing cement grouting machines having simple anti-backflow devices with poor sealing performance, making it difficult to effectively prevent cement slurry backflow under complex working conditions. Furthermore, these devices are inconvenient to disassemble and clean separately after use, and the sealing components are easily damaged under long-term corrosion from cement slurry, resulting in a short service life. Frequent maintenance and replacement of parts bring great inconvenience to construction.

[0006] To achieve the above objectives, the anti-backflow mechanism for the cement grouting machine proposed in this utility model includes a grouting pipe, a hopper fixedly connected to the top of the grouting pipe, a discharge nozzle fixedly connected to the front side of the grouting pipe, a power end provided at the rear side of the grouting pipe, an anti-backflow pipe provided at the front side of the grouting pipe, an anti-backflow mechanism provided inside the anti-backflow pipe, and a connecting pipe fixedly connected to the rear side of the anti-backflow pipe.

[0007] The anti-backflow mechanism includes a retaining ring, several elastic plates, an anti-backflow plate, and three sealing rings. The front side of the sealing ring is fixedly connected to the rear side of the anti-backflow plate. The retaining ring is fixedly connected to the inner wall of the anti-backflow plate. The rear side of the elastic plate is fixedly connected to the front side of the retaining ring. The surface of the elastic plate is in contact with the surface of the anti-backflow plate. The rear side of the sealing ring is in close contact with the front side of the retaining ring.

[0008] Preferably, the top and bottom of the anti-backflow plate are fixedly connected with sliding rods, which are slidably connected inside the retaining ring.

[0009] Preferably, limit blocks are provided at the top and bottom of the rear side of the retaining ring, and the front side of the limit block is fixedly connected to the rear side of the slide rod.

[0010] Preferably, the surface of the anti-backflow pipe is fixedly connected with anti-slip strips, and the number of anti-slip strips is several and they are evenly distributed on the surface of the anti-backflow pipe.

[0011] Preferably, a sealing gasket is fixedly connected to the inner wall of the connecting tube, and the rear side of the sealing gasket is in close contact with the front side of the discharge nozzle.

[0012] Preferably, the front side of the anti-backflow pipe is fixedly connected to a discharge port, and the surface of the discharge port is roughened.

[0013] Preferably, the elastic sheet is made of beryllium bronze and the sealing ring is made of polyurethane rubber.

[0014] Preferably, the inner wall of the connecting pipe is threaded to the surface of the discharge nozzle.

[0015] In this invention, by setting three sealing rings, when cement slurry backflows, the elastic sheet converging towards the center of the anti-backflow plate pushes the anti-backflow plate backward, causing the three sealing rings to fit tightly against the front side of the retaining ring. This blocks the cement slurry backflow channel, preventing backflow of cement slurry inside the cement grouting machine. The three sealing rings increase sealing performance and further improve the sealing effect. After the cement slurry is delivered, the anti-backflow pipe can be rotated by holding the anti-slip strip to disengage the connecting pipe from the discharge nozzle, thus removing the anti-backflow pipe. This allows for the cleaning of the anti-backflow plate, sealing ring, and elastic sheet inside the anti-backflow pipe, preventing cement slurry from solidifying on the surfaces of these components and affecting their normal anti-backflow function. It also avoids the problems of existing cement grouting machines with simple anti-backflow devices that have poor sealing performance, making it difficult to effectively prevent cement slurry backflow under complex working conditions. Furthermore, these devices are inconvenient to disassemble and clean after use, and the sealing components are easily damaged by long-term cement slurry corrosion, resulting in a short service life and frequent maintenance and replacement, causing significant inconvenience to construction. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a three-dimensional connection diagram of the discharge nozzle and the connecting pipe in an embodiment of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the anti-backflow pipe and the outlet in an embodiment of this utility model;

[0020] Figure 4 This is a three-dimensional schematic diagram of the internal structure of the anti-backflow pipe in an embodiment of this utility model;

[0021] Figure 5 This is a three-dimensional exploded view of the connecting pipe and sealing gasket in an embodiment of this utility model;

[0022] Figure 6 This is a three-dimensional connection diagram of the anti-backflow plate and the anti-backflow pipe in an embodiment of this utility model.

[0023] Explanation of reference numerals in the attached diagram: 1. Grouting pipe; 2. Hopper; 3. Discharge nozzle; 4. Anti-backflow pipe; 5. Connecting pipe; 6. Discharge outlet; 7. Anti-backflow mechanism; 701. Retaining ring; 702. Elastic sheet; 703. Anti-backflow plate; 704. Sealing ring; 8. Limiting block; 9. Anti-slip strip; 10. Slide rod; 11. Sealing gasket; 12. Power end.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] This utility model provides a backflow prevention mechanism for cement grouting machines, which aims to solve the problems of existing cement grouting machines having simple anti-backflow devices with poor sealing performance, making it difficult to effectively prevent cement slurry backflow under complex working conditions, and being inconvenient to disassemble and clean separately after use. Under long-term corrosion from cement slurry, the sealing components are easily damaged, have a short service life, and frequent maintenance and replacement of parts bring great inconvenience to construction.

[0030] like Figure 1-6 As shown, the anti-backflow mechanism of the cement grouting machine provided in this embodiment of the utility model includes a grouting pipe 1, a hopper 2 fixedly connected to the top of the grouting pipe 1, a discharge nozzle 3 fixedly connected to the front side of the grouting pipe 1, a power end 12 provided on the rear side of the grouting pipe 1, an anti-backflow pipe 4 provided on the front side of the grouting pipe 1, an anti-backflow mechanism 7 provided inside the anti-backflow pipe 4, and a connecting pipe 5 fixedly connected to the rear side of the anti-backflow pipe 4.

[0031] The anti-backflow mechanism 7 includes a retaining ring 701, several elastic plates 702, an anti-backflow plate 703, and three sealing rings 704. The front side of the sealing ring 704 is fixedly connected to the rear side of the anti-backflow plate 703. The retaining ring 701 is fixedly connected to the inner wall of the anti-backflow plate 703. The rear side of the elastic plate 702 is fixedly connected to the front side of the retaining ring 701. The surface of the elastic plate 702 is in contact with the surface of the anti-backflow plate 703. The rear side of the sealing ring 704 is in close contact with the front side of the retaining ring 701.

[0032] In the technical solution of this utility model, by setting three sealing rings 704, when the cement slurry backflows, the elastic sheet 702, which converges towards the center of the anti-backflow plate 703, pushes the anti-backflow plate 703 backward, so that the three sealing rings 704 are tightly fitted with the front side of the retaining ring 701, thereby blocking the cement slurry backflow channel and preventing the cement slurry inside the cement grouting machine from backflowing. The three sealing rings 704 increase the sealing performance and further improve the sealing effect. After the cement slurry is delivered, the anti-backflow pipe 4 can be rotated by holding the anti-slip strip 9, so that the connecting pipe 5 is disengaged from the discharge nozzle 3, and the anti-backflow pipe 4 can be removed. This allows for the cleaning of the anti-backflow plate 703, sealing ring 704, and elastic sheet 702 inside the anti-backflow pipe 4, preventing cement slurry from solidifying on the surfaces of the anti-backflow plate 703, sealing ring 704, elastic sheet 702, and slide rod 10. This avoids affecting the normal anti-backflow operation of the anti-backflow plate 703 and avoids the problems of existing cement grouting machines having simple anti-backflow device designs, poor sealing performance, difficulty in effectively preventing cement slurry backflow under complex working conditions, and inconvenience for disassembly and cleaning after use. Under long-term corrosion from cement slurry, the sealing components are easily damaged, have a short service life, and frequent maintenance and replacement of parts bring great inconvenience to construction.

[0033] Please refer to the following: Figure 4 The top and bottom of the anti-backflow plate 703 are fixedly connected to slide rods 10, which are slidably connected inside the retaining ring 701. In this embodiment, by sliding the slide rods 10 inside the retaining ring 701, the forward movement of the anti-backflow plate 703 is made more stable when the anti-backflow pipe 4 is opened.

[0034] For further information, please continue to refer to [link / reference]. Figure 4 Limiting blocks 8 are provided at the top and bottom of the rear side of the retaining ring 701, and the front side of the limiting block 8 is fixedly connected to the rear side of the slide rod 10. In this embodiment, by limiting the slide rod 10 with the limiting block 8, the slide rod 10 can be prevented from separating from the retaining ring 701.

[0035] Please continue to refer to this. Figure 4 Anti-slip strips 9 are fixedly connected to the surface of the anti-backflow pipe 4. There are several anti-slip strips 9, which are evenly distributed on the surface of the anti-backflow pipe 4. In this embodiment, the anti-backflow pipe 4 can be easily rotated by holding the anti-slip strips 9, thereby facilitating the rotation of the connecting pipe 5.

[0036] Please refer to Figure 2 and Figure 5 A sealing gasket 11 is fixedly connected to the inner wall of the connecting pipe 5, and the rear side of the sealing gasket 11 is in close contact with the front side of the discharge nozzle 3. In this embodiment, by rotating the connecting pipe 5 to be threadedly connected to the surface of the discharge nozzle 3 and tightening it, the sealing gasket 11 will seal the connection between the connecting pipe 5 and the discharge nozzle 3.

[0037] Additionally, please refer to Figure 3 The front side of the anti-backflow pipe 4 is fixedly connected to the outlet 6, and the surface of the outlet 6 is roughened. In this embodiment, the outlet 6 is fixedly connected to the backflow pipe, and the surface of the outlet 6 is roughened, so that the external cement slurry delivery pipe can be easily and tightly fitted onto the surface of the outlet 6.

[0038] Please refer to Figure 4 and Figure 6 The elastic sheet 702 is made of beryllium bronze, and the sealing ring 704 is made of polyurethane rubber. In this embodiment, because the beryllium bronze elastic sheet 702 has good elasticity and wear resistance, when work stops or the pressure inside the grouting pipe 1 suddenly decreases, the cement grout will tend to flow back. At this time, the elastic sheet 702 will quickly return to its original shape due to its good elasticity, pushing the anti-backflow plate 703 to move backward and reset, so that the anti-backflow plate 703 and the sealing ring 704 seal the retaining ring 701. The polyurethane rubber sealing ring 704 has good sealing performance and wear resistance, and makes close contact with the front side of the retaining ring 701, further enhancing the sealing effect and preventing cement grout from leaking back from the gap, thereby achieving a reliable anti-backflow function.

[0039] Additionally, please refer to Figure 2 and Figure 5 The inner wall of the connecting pipe 5 is threadedly connected to the surface of the discharge nozzle 3. In this embodiment, the connecting pipe 5 and the anti-backflow pipe 4 can be easily disassembled and cleaned by the threaded connection between the inner wall of the connecting pipe 5 and the surface of the discharge nozzle 3.

[0040] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A cement grout machine anti-backflow mechanism, characterized by, The cement grouting machine backflow prevention mechanism includes a grouting pipe (1), the top of the grouting pipe (1) is fixedly connected with a hopper (2), the front side of the grouting pipe (1) is fixedly connected with a discharge nozzle (3), the rear side of the grouting pipe (1) is provided with a power end (12), the front side of the grouting pipe (1) is provided with a backflow prevention pipe (4), the inside of the backflow prevention pipe (4) is provided with a backflow prevention mechanism (7), and the rear side of the backflow prevention pipe (4) is fixedly connected with a connecting pipe (5). The backflow prevention mechanism (7) includes a check ring (701), a plurality of elastic sheets (702), a backflow prevention plate (703) and three sealing rings (704), the front side of the sealing ring (704) is fixedly connected with the rear side of the backflow prevention plate (703), the check ring (701) is fixedly connected with the inner wall of the backflow prevention plate (703), the rear side of the elastic sheet (702) is fixedly connected with the front side of the check ring (701), the surface of the elastic sheet (702) is in contact with the surface of the backflow prevention plate (703), and the rear side of the sealing ring (704) is in close contact with the front side of the check ring (701).

2. The cement grout machine anti-backflow mechanism of claim 1, wherein, The top and bottom of the backflow prevention plate (703) are fixedly connected with sliding rods (10), and the sliding rods (10) are slidingly connected in the check ring (701).

3. The cement grout machine anti-backflow mechanism of claim 2, wherein, The top and bottom of the rear side of the check ring (701) are provided with limiting blocks (8), and the front side of the limiting block (8) is fixedly connected with the rear side of the sliding rod (10).

4. The cement grout machine anti-backflow mechanism of claim 1, wherein, The surface of the backflow prevention pipe (4) is fixedly connected with anti-skid strips (9), the number of the anti-skid strips (9) is several and is uniformly distributed on the surface of the backflow prevention pipe (4).

5. The cement grout machine anti-backflow mechanism of claim 1, wherein, The inner wall of the connecting pipe (5) is fixedly connected with a sealing gasket (11), and the rear side of the sealing gasket (11) is in close contact with the front side of the discharge nozzle (3).

6. The cement grout machine anti-backflow mechanism of claim 1, wherein, The front side of the backflow prevention pipe (4) is fixedly connected with a discharge port (6), and the surface of the discharge port (6) is subjected to a sanding treatment.

7. The cement grout machine anti-backflow mechanism of claim 1, wherein, The material of the elastic sheet (702) is beryllium bronze, and the material of the sealing ring (704) is polyurethane rubber.

8. The cement grout machine anti-backflow mechanism of claim 1, wherein, The inner wall of the connecting pipe (5) is threadedly connected with the surface of the discharge nozzle (3).

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