Grouting pipe burying device for municipal engineering construction

Abstract

The invention discloses a grouting pipe embedding device for municipal engineering construction, and relates to the technical field of grouting pipes. A falling piston rod can stably input gas in a gas-liquid two-way pipe into a rubber gas partition arranged outside the grouting pipe, so that the gas is expanded, and the grouting pipe is embedded in the gas-liquid two-way pipe; the spiral diameter of the expanded rubber air partition is larger than the diameter of the upper end and the diameter of the lower end of the grouting pipe, a spiral setting posture can be formed in the hole channel, the grouting pipe is stabilized in the hole channel, the grouting stability is improved, meanwhile, the spirally-wound rubber air partition can effectively block soil residues or broken stones falling in the hole channel, and the grouting effect is improved. In addition, the spiral rubber gas partition does not form isolated ring sealing on the hole channel, during grouting, gas in the underground space can be smoothly discharged through gaps of the spirally-set rubber gas partition, and the grouting quality is improved. The problem that a honeycomb-shaped wrapping layer is formed after gas in a narrow underground space cannot be discharged and is mixed and solidified with slurry is solved.

Description

Technical Field

[0001] The invention relates to the technical field of grouting pipes, in particular to a grouting pipe burying device for municipal engineering construction. Background Art

[0002] Pipeline engineering is a branch of municipal engineering. The tap water, natural gas, etc. used in our daily lives, as well as the discharge of sewage, all involve pipeline engineering in municipal engineering. These pipelines are often buried underground. After the pipeline is laid and the earth is backfilled, there is a certain gap between the pipeline and the soil. At the same time, there are certain gaps at the joints of the pipeline. These gaps are prone to leakage after years of use. In order to ensure the sealing of the pipeline, after the pipeline is buried, it is usually necessary to use a grouting pipe to inject concrete into the inside, so as to seal the gap between the pipeline and the soil and the gap between the pipelines to prevent leakage; at the same time, it also has a reinforcement effect on some areas or soft soil layers that are prone to landslides. During the burial of the grouting pipe, a grouting pipe burying device is required.

[0003] Although municipal pipelines are generally not laid too deep (usually 1-2 meters from the surface), drilling operations before grouting are also an indispensable part. Existing drilling and grouting equipment is generally suitable for filling underground spaces that are deep and large, such as underground wells or easily collapsed spaces formed by underground mining. Generally, the comprehensiveness of the filling is not given much consideration. It is only necessary to form sufficient support force to backfill the terrain to prevent collapse. However, filling the gap between municipal pipes and soil is essentially different from grouting backfilling in large underground spaces. The purpose of filling the gap between municipal pipes and soil is to eliminate the gaps at the joints and form a tight and dense wrapping outside the pipes to improve the sealing life of the pipe joints. For relatively narrow underground spaces, existing technologies often ignore the problems of soil debris protection and exhaust. Because when the grouting pipe is inserted into the underground grouting by drilling, on the one hand, it is necessary to prevent soil debris or gravel from falling and mixing with the slurry to form bubbles that are not tight enough and easy to break, resulting in reduced protection. On the other hand, for small spaces, grouting and underground exhaust need to be intaken at the same time, otherwise the gas cannot be discharged and will mix with the slurry and solidify to form a honeycomb wrapping layer, which not only has poor wrapping but is also not strong enough.

[0004] In response to the above problems, the present invention proposes a grouting pipe burying device that takes into account both preventing soil debris from falling and exhausting, so as to improve the compactness of slurry injection in a narrow underground space. Summary of the Invention

[0005] The technical solution of the present invention addresses the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technologies. Specifically, the purpose of the present invention is to provide a grouting pipe burying device for municipal engineering construction, so as to solve the problem that the gap between the municipal pipeline and the soil proposed in the above-mentioned background technology is essentially different from the grouting backfilling of large underground spaces. The purpose of filling the gap between the municipal pipeline and the soil is to eliminate the gap at the joint and form a tight and dense wrapping outside the pipeline to improve the sealing life of the pipeline joint. For relatively narrow underground spaces, the existing technology often ignores the problems of soil debris protection and exhaust. Because when the grouting pipe is inserted into the underground grouting by drilling, on the one hand, it is necessary to prevent soil debris or gravel from falling and mixing with the slurry to form bubbles that are not tight and dense enough, which are easy to break and reduce the protection. On the other hand, for a small space, grouting and underground exhaust need to be aired in at the same time, otherwise the gas cannot be discharged and will mix with the slurry and solidify to form a honeycomb wrapping layer, which not only has poor wrapping but also is not strong enough.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a grouting pipe burying device for municipal engineering construction, comprising a frame, a grouting mechanism and a pressure drill drive mechanism both mounted on the frame, a grouting pipe connected to the output end of the pressure drill drive mechanism, a gas-liquid dual-way pipe fixed at the center of the grouting pipe for grouting and exhaust, and a rubber gas barrier spirally arranged at an equal angle in a recessed portion of the outer wall of the grouting pipe for receiving gas exhausted from the gas-liquid dual-way pipe and expanding to achieve an annular seal; The internal sliding of the gas-liquid dual-channel pipe is provided with a piston rod which falls adaptively as the grouting progresses; A jacking assembly driven by the lower end of the piston rod is installed inside the grouting pipe; Both sides of the gas-liquid dual-pass pipe are symmetrically connected with slurry outlet pipes that are adaptively opened by the extrusion drive of the jacking component, and the lower ends of the slurry outlet pipes pass through the grouting pipe; A drill bit is installed at the lower end of the grouting pipe.

[0007] Preferably, the rubber air barrier is elastically hollow, and the upper and lower ends of the rubber air barrier are fixedly connected to the outer wall of the grouting pipe; An annular air cavity is provided inside the grouting pipe corresponding to the upper end of the rubber air barrier, and an exhaust hole penetrating the grouting pipe is provided at the lower end of the annular air cavity at an equal angle; The upper end of the rubber air separator is connected to the annular air cavity through the exhaust hole.

[0008] Preferably, the side wall of the gas-liquid dual-channel pipe is symmetrically connected to the lower end of the exhaust pipe, and the upper end of the exhaust pipe is connected to the annular air cavity; A connecting pipe is provided between the grouting port of the grouting mechanism and the gas-liquid double-way pipe.

[0009] Preferably, the side wall of the gas-liquid dual-pass pipe is symmetrically connected to one end of the cone sleeve, and the other end of the cone sleeve is connected to the upper end of the slurry discharge pipe; A central column is fixed at the center of the cone sleeve, and a ball valve is slidably provided on the outer wall of the central column; The outer wall of the ball valve close to the slurry outlet pipe is fitted with a push rod which slides through the cone sleeve.

[0010] Preferably, a first spring is wound around the outer wall of the center column, one end of the first spring is welded to the outer wall of the ball valve, and the other end of the first spring is fixed to the outer wall of the end portion of the center column.

[0011] Preferably, the jacking assembly includes a support plate fixed inside the grouting pipe, and a guide rod is symmetrically fixed to the upper end of the support plate, a slider is slidably provided on the outer wall of the guide rod, and a protrusion is fixed to the upper end of the slider.

[0012] Preferably, the upper and lower ends of the push rod are both hemispherical, and the upper surface of the protrusion is a frustum with a convex center and two downwardly oriented sides, and the lower end of the push rod is in close contact with the upper surface of the protrusion. The edge of the lower end of the piston rod is smoothly chamfered.

[0013] Preferably, a second spring is wound around the outer wall of the guide rod, one end of the second spring is welded to the end of the guide rod, and the other end of the second spring is fixed to the side wall; A limiting rod that is slidably matched with the sliding block is fixed to the side wall of the support plate.

[0014] Preferably, the jacking assembly further comprises a fixing plate fixedly connected to the inner wall of the slurry outlet pipe and the grouting pipe, and the jacking rod slides through the fixing plate; A third spring is wound around the outer wall of the push rod, one end of the third spring is welded to the outer wall of the fixing plate, and the other end of the third spring is fixed to a convex disk arranged on the outer wall of the push rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. During grouting, the falling piston rod will stably input the gas inside the gas-liquid dual-pass pipe into the rubber air barrier set outside the grouting pipe, causing it to expand. The spiral diameter of the expanded rubber air barrier is larger than the diameters of the upper and lower ends of the grouting pipe, forming a spiral sealing posture in the channel, stabilizing the grouting pipe in the channel and increasing the stability of grouting. At the same time, the spirally wound rubber air barrier can effectively block the soil debris or gravel falling in the channel, avoiding the mixing of a large amount of soil debris and gravel into the slurry during grouting and affecting the curing quality. In addition, the spiral rubber air barrier will not form an isolated ring seal for the channel. During grouting, the gas in the underground space can be smoothly discharged through the gap of the spirally sealed rubber air barrier, solving the problem that the gas in the narrow underground space cannot be discharged and will form a honeycomb wrapping layer after mixing with the slurry and solidifying; 2. Continuous grouting, the piston rod continues to fall, and the lower end of the piston rod will produce an extrusion and pushing effect on the inclined surfaces of the two protrusions as it continues to fall. At the same time, since the protrusions are restricted horizontally and cannot fall, the two protrusions will synchronously drive the two sliders to slide horizontally away from each other along the outer walls of the two guide rods. Since the upper surface of the protrusion is also in contact with the hemispherical lower end of the push rod, the two horizontally expanded protrusions will produce an upward pushing effect on the two push rods. The upward-pushing hemispherical upper end of the push rod will move vertically upward to squeeze the ball valve, causing the ball valve to move horizontally and open the cone sleeve, so that the slurry inside the gas-liquid dual-way pipe is stably injected into the two symmetrical slurry outlet pipes through the two symmetrical cone sleeves, and then symmetrically output to the underground space from the side of the lower end of the grouting pipe through the slurry outlet pipes, thereby achieving stable grouting operation.

[0016] 3. Finally, when the grouting is completed, the grouting mechanism releases pressure, that is, no more liquid is injected into the connecting pipe. At this time, the push rod and the bump are reset synchronously, so that the two cone sleeves are closed. At the same time, the expanded rubber air barrier outside the grouting pipe will reset under its own elastic action, and reset from the expanded state to the initial state and return the excess gas from the annular air cavity and the exhaust pipe to the lower space of the gas-liquid double-pass pipe, and push the piston rod to the initial position. At the same time, the upward piston rod will push the remaining slurry in the upper cavity back to the grouting mechanism through the connecting pipe, which can effectively prevent the concrete slurry remaining in the grouting pipe from solidifying and affecting the next operation. The entire drilling and grouting operation is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention during drilling.

[0018] Figure 2 It is a schematic diagram of the overall structure during grouting of the present invention.

[0019] Figure 3 This is a schematic diagram of the state in which the rubber air septum is retracted during drilling in the present invention.

[0020] Figure 4 This is a schematic structural diagram of the rubber air barrier expansion during grouting in the present invention.

[0021] Figure 5 This is a schematic diagram of the internal structure of the grouting pipe after it is cut open.

[0022] Figure 6 This is a schematic diagram of the internal structure of the grouting pipe, gas-liquid two-way pipe and other parts after being cut open.

[0023] Figure 7 Schematic diagram of the installation structure of the exhaust pipe of the present invention.

[0024] In the figure: 1. frame; 2. grouting mechanism; 21. connecting pipe; 3. pressure drill drive mechanism; 4. grouting pipe; 41. annular air cavity; 42. rubber air separator; 5. drill bit; 6. gas-liquid two-way pipe; 61. piston rod; 7. slurry outlet pipe; 71. cone sleeve; 72. center column; 73. ball valve; 74. first spring; 8. push rod; 81. support plate; 82. guide rod; 83. slider; 84. second spring; 85. bump; 86. fixing plate; 87. third spring; 9. exhaust pipe. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1 to 7 The present invention provides a technical solution: a grouting pipe burying device for municipal engineering construction, comprising a frame 1 and a grouting mechanism 2 and a pressure drill drive mechanism 3 both mounted on the frame 1, a grouting pipe 4 connected to the output end of the pressure drill drive mechanism 3, a gas-liquid dual-way pipe 6 fixed at the center of the grouting pipe 4 for grouting and exhausting gas, and a rubber gas barrier 42 spirally arranged at an equiangular angle in a recessed portion of the outer wall of the grouting pipe 4 for receiving gas discharged from the gas-liquid dual-way pipe 6 and expanding to achieve an annular seal; The gas-liquid dual-channel pipe 6 is internally provided with a piston rod 61 which slides downwards adaptively as the grouting progresses; The interior of the grouting pipe 4 is provided with a jacking assembly driven by the lower end of the piston rod 61; The two sides of the gas-liquid dual-channel pipe 6 are symmetrically connected with the slurry outlet pipe 7 which is adaptively opened by the extrusion drive of the jacking component, and the lower end of the slurry outlet pipe 7 passes through the grouting pipe 4; A drill bit 5 is installed at the lower end of the grouting pipe 4.

[0027] As a further embodiment of the present invention, the drilling operation driven by the pressure drill driving mechanism 3 and the extrusion grouting operation of the grouting mechanism 2 are existing technologies well known to people in this field, so they are not described in detail in the present invention. It should be added that when the pressure drill driving mechanism 3 drives the grouting pipe 4 and the drill bit 5 to rotate and fall to drill a hole, the grouting mechanism 2 and the connecting pipe 21 are rotatably connected.

[0028] The rubber air barrier 42 is elastic and hollow, and the upper and lower ends of the rubber air barrier 42 are fixedly connected to the outer wall of the grouting pipe 4; An annular air cavity 41 is provided inside the grouting pipe 4 corresponding to the upper end of the rubber air barrier 42, and an exhaust hole penetrating the grouting pipe 4 is provided at the lower end of the annular air cavity 41 at an equal angle; The upper end of the rubber air separator 42 is connected to the annular air cavity 41 through the exhaust hole.

[0029] As a further embodiment of the present invention, the falling piston rod 61 will stably input the gas inside the gas-liquid dual-way tube 6 into the rubber air barrier 42 provided outside the grouting pipe 4, causing the rubber air barrier 42 to gradually expand. Before expansion, the spiral diameter of the rubber air barrier 42 is smaller than the diameters of the upper and lower ends of the grouting pipe 4, that is, the rubber air barrier 42 will be hidden in the depression outside the grouting pipe 4 before expansion and will not affect the burial of the grouting pipe 4 into the soil. The spiral diameter of the expanded rubber air barrier 42 is larger than the diameters of the upper and lower ends of the grouting pipe 4. When the grouting pipe 4 is located in the borehole, the expanded rubber air barrier 42 will form a spiral sealing posture in the channel, thereby stabilizing the grouting pipe 4 in the channel and increasing the stability of grouting.

[0030] The side wall of the gas-liquid dual-pass pipe 6 is symmetrically connected to the lower end of the exhaust pipe 9, and the upper end of the exhaust pipe 9 is connected to the annular air cavity 41; A connecting pipe 21 is provided between the grouting port of the grouting mechanism 2 and the gas-liquid dual-way pipe 6 .

[0031] As a further embodiment of the present invention, the cavity inside the gas-liquid dual-way tube 6 is divided into two parts, upper and lower parts, by the upper piston end of the piston rod 61. The upper cavity is filled with slurry, and the lower cavity is a gas chamber. When the piston rod 61 falls vertically under the pressure of the slurry, the gas in the lower cavity will be gradually injected into the annular air cavity 41 opened inside the grouting pipe 4 through the exhaust pipe 9 symmetrically connected at the lower end under the action of the pressure of the piston rod 61.

[0032] The side wall of the gas-liquid dual-pass pipe 6 is symmetrically connected to one end of the cone sleeve 71, and the other end of the cone sleeve 71 is connected to the upper end of the slurry discharge pipe 7; A central column 72 is fixed at the center of the cone sleeve 71, and a ball valve 73 is slidably provided on the outer wall of the central column 72; The outer wall of the ball valve 73 close to the pulp outlet pipe 7 is fitted with a push rod 8 that slides through the cone sleeve 71 .

[0033] A first spring 74 is wound around the outer wall of the center column 72 , one end of the first spring 74 is welded to the outer wall of the ball valve 73 , and the other end of the first spring 74 is fixed to the outer wall of the end of the center column 72 .

[0034] As a further embodiment of the present invention, in the initial state, the first spring 74 presses the ball valve 73 against the inner wall of the cone sleeve 71 to achieve an annular seal inside the cone sleeve 71, and when the push rod 8 acts, the ball valve 73 will adaptively slide horizontally along the outer wall of the center column 72 and compress the first spring 74. Since the internal space of the cone sleeve 71 is a conical design with a gradually increasing opening along the moving direction of the ball valve 73, as the ball valve 73 moves horizontally, the blocking effect of the ball valve 73 on the cone sleeve 71 is gradually released, so that the slurry inside the gas-liquid two-way pipe 6 is stably injected into the two symmetrically arranged slurry outlet pipes 7 through the two symmetrical cone sleeves 71.

[0035] The lifting assembly includes a support plate 81 fixed inside the grouting pipe 4, and a guide rod 82 is symmetrically fixed to the upper end of the support plate 81. A slider 83 is slidably provided on the outer wall of the guide rod 82, and a protrusion 85 is fixed to the upper end of the slider 83.

[0036] As a further embodiment of the present invention, the lower end of the piston rod 61 will produce an extrusion and pushing effect on the inclined surfaces of the two protrusions 85 as it continues to fall. At the same time, since the protrusions 85 are horizontally restricted and cannot fall, the two protrusions 85 will synchronously drive the two sliders 83 to slide horizontally away from each other along the outer walls of the two guide rods 82 and compress the corresponding second springs 84.

[0037] The upper and lower ends of the push rod 8 are both hemispherical, and the upper surface of the protrusion 85 is a frustum with a convex center and two downwardly oriented sides, and the lower end of the push rod 8 is in close contact with the upper surface of the protrusion 85. The edge of the lower end of the piston rod 61 is smoothly chamfered.

[0038] As a further embodiment of the present invention, the edge of the lower end of the piston rod 61 is smoothly chamfered and the lower end of the push rod 8 is hemispherical. The purpose is to play a relatively smooth horizontal extrusion and pushing role on the inclined upper surface of the protrusion 85 to prevent it from getting stuck. The upper surfaces of the two protrusions 85 will expand adaptively after being squeezed by the lower end of the piston rod 61 and push the push rod 8 in the same way. A second spring 84 is wound around the outer wall of the guide rod 82, and one end of the second spring 84 is welded to the end of the guide rod 82, and the other end of the second spring 84 is fixed to the side wall; A limiting rod that slidably cooperates with the slider 83 is fixed to the side wall of the support plate 81 .

[0039] As a further embodiment of the present invention, in the initial state, the second spring 84 will make the slider 83 fall stably in the central area of ​​the guide rod 82, ensuring that the piston rod 61 can stably contact the two protrusions 85 when falling.

[0040] The lifting assembly also includes a fixing plate 86 fixedly connected to the inner wall of the slurry outlet pipe 7 and the grouting pipe 4, and the ejector rod 8 slides through the fixing plate 86; A third spring 87 is wound around the outer wall of the push rod 8 , one end of the third spring 87 is welded to the outer wall of the fixing plate 86 , and the other end of the third spring 87 is fixed to a convex disc provided on the outer wall of the push rod 8 .

[0041] As a further embodiment of the present invention, initially, the third spring 87 will firmly press the push rod 8, so that the hemispherical upper end of the push rod 8 is stably inserted into the cone sleeve 71 and maintains a stable fit with the ball valve 73 to prevent transmission from being jerked.

[0042] Working principle: When using the grouting pipe burying device for municipal engineering construction, first mark the area where drilling and grouting are required, and rotate the grouting pipe 4 and the drill bit 5 through the drill drive mechanism 3 to insert them into the drilling area. When the lower end of the grouting pipe 4 falls stably into the joint between the municipal pipeline and the soil, stop drilling and keep the grouting pipe 4 and the drill bit 5 stable.

[0043] Then, the grouting mechanism 2 is used to pressurize the interior of the connecting pipe 21. Figure 5 and Figure 6 As shown, the concrete slurry is pressurized into the gas-liquid two-way pipe 6 through the connecting pipe 21, so that the piston rod 61 gradually falls under the pressure of the slurry, and the cavity inside the gas-liquid two-way pipe 6 is divided into two parts, the upper part of the cavity is filled with slurry, and the lower part is a gas chamber. When the piston rod 61 falls vertically under the pressure of the slurry, the gas in the lower part of the cavity will be gradually injected into the annular air cavity 41 opened inside the grouting pipe 4 through the exhaust pipe 9 symmetrically connected at the lower end under the pressure of the piston rod 61, and then the gas will be evenly injected into the hollow elastic rubber air separator 42 spirally arranged at equal angles on the outside of the grouting pipe 4 through the exhaust holes opened at equal angles at the lower end of the annular air cavity 41; When grouting is in progress, the falling piston rod 61 will stably input the gas inside the gas-liquid dual-way pipe 6 into the rubber air barrier 42 provided outside the grouting pipe 4, causing the rubber air barrier 42 to gradually Figures 3 and 4The expansion change of the rubber air barrier 42 before expansion is smaller than the diameter of the upper and lower ends of the grouting pipe 4, that is, the rubber air barrier 42 will be hidden in the depression outside the grouting pipe 4 before expansion, which will not affect the burial of the grouting pipe 4 into the soil. The spiral diameter of the rubber air barrier 42 after expansion is larger than the diameter of the upper and lower ends of the grouting pipe 4. When the grouting pipe 4 is located in the drilled hole, the expanded rubber air barrier 42 will form a spiral sealing posture in the channel, which will stabilize the grouting pipe 4 in the channel and increase the grouting stability. At the same time, the spirally wound rubber air barrier 42 can effectively block the soil debris or gravel falling in the channel, avoiding the mixing of a large amount of soil debris and gravel into the slurry during grouting and affecting the solidification quality. In addition, the rubber air barrier 42 in the spiral posture will not form an isolated ring seal for the channel. During grouting, the gas in the underground space can be smoothly discharged through the gap of the spirally sealed rubber air barrier 42, which solves the problem that the gas in the narrow underground space cannot be discharged and will form a honeycomb wrapping layer after mixing with the slurry and solidifying.

[0044] As the connecting pipe 21 continues to grout, the piston rod 61 continues to fall. When the lower end of the piston rod 61 gradually contacts the upper surfaces of the two protrusions 85, the upper piston end of the piston rod 61 falls below the two tapered sleeves 71, that is, the grouting area is connected to the two tapered sleeves 71, but due to the obstruction of the ball valve 73, communication is not yet achieved. Then, the piston rod 61, which contacts the upper surfaces of the two protrusions 85, continues to fall a certain distance under the pressure of the continuously injected slurry, and the lower end of the piston rod 61 exerts an extrusion and pushing effect on the inclined surfaces of the two protrusions 85 as it continues to fall. At the same time, because the protrusions 85 are horizontally restricted and cannot fall, the two protrusions 85 will synchronously drive the two sliders 83 to slide horizontally away from each other along the outer walls of the two guide rods 82 and compress the corresponding second springs 84. At the same time, if Figure 5 and Figure 6 As shown, since the upper surface of the protrusion 85 is also in contact with the hemispherical lower end of the push rod 8, the two protrusions 85 that expand horizontally will similarly produce an upward pushing effect on the two push rods 8. On the one hand, the upwardly pushed push rod 8 will compress the third spring 87, and on the other hand, the hemispherical upper end of the push rod 8 will also move vertically upward to squeeze the ball valve 73, so that the ball valve 73 can adaptively slide horizontally along the outer wall of the center column 72 and compress the first spring 74. Since the internal space of the cone sleeve 71 is a cone-shaped design with a gradually increasing opening along the moving direction of the ball valve 73, as the ball valve 73 moves horizontally, the blocking effect of the ball valve 73 on the cone sleeve 71 is gradually released, so that the slurry inside the gas-liquid dual-way pipe 6 is stably injected into the two symmetrically arranged slurry outlet pipes 7 through the two symmetrical cone sleeves 71, and then symmetrically output to the underground space through the slurry outlet pipes 7 from the side of the lower end of the grouting pipe 4, thereby achieving stable grouting operation.

[0045] Finally, when the grouting is finished, the grouting mechanism 2 releases the pressure, that is, no more liquid is injected into the connecting pipe 21. At this time, the push rod 8 and the protrusion 85 are reset synchronously, so that the two cone sleeves 71 are closed. At the same time, the rubber air barrier 42 expanded outside the grouting pipe 4 will be reset under its own elastic action. Figure 4 The expansion state is reset to Figure 3 The initial state of the grouting mechanism 2 is achieved and the excess gas is returned to the lower space of the gas-liquid dual-way pipe 6 through the annular air cavity 41 and the exhaust pipe 9, and the piston rod 61 is pushed up to the initial position. At the same time, the upward piston rod 61 pushes the residual slurry in the upper cavity back to the grouting mechanism 2 through the connecting pipe 21, which can effectively prevent the concrete slurry remaining in the grouting pipe 4 from solidifying and affecting the next operation. The entire drilling and grouting operation is completed.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A grouting pipe burying device for municipal engineering construction, comprising a vehicle frame (1) and a grouting mechanism (2) and a pressure drill driving mechanism (3) both mounted on the vehicle frame (1), characterized in that: It also includes a grouting pipe (4) connected to the output end of the pressure drill drive mechanism (3), a gas-liquid dual-channel pipe (6) fixed at the center of the grouting pipe (4) for grouting and exhausting gas, and a rubber gas barrier (42) spirally arranged at an equiangular angle at a recessed portion of the outer wall of the grouting pipe (4) for receiving gas discharged from the gas-liquid dual-channel pipe (6) and expanding to achieve an annular seal; A piston rod (61) is slidingly provided inside the gas-liquid dual-channel pipe (6) and falls adaptively as the grouting proceeds; A jacking assembly driven by the extrusion of the lower end of the piston rod (61) is installed inside the grouting pipe (4); Both sides of the gas-liquid dual-pass pipe (6) are symmetrically connected to a slurry outlet pipe (7) that is adaptively opened by being squeezed and driven by the jacking component, and the lower end of the slurry outlet pipe (7) passes through the grouting pipe (4); A drill bit (5) is installed at the lower end of the grouting pipe (4).

2. A grouting pipe embedding device for municipal engineering construction according to claim 1, characterized in that: The rubber air barrier (42) is elastically hollow, and the upper and lower ends of the rubber air barrier (42) are fixedly connected to the outer wall of the grouting pipe (4); An annular air cavity (41) is provided inside the grouting pipe (4) corresponding to the upper end of the rubber air barrier (42), and an exhaust hole penetrating the grouting pipe (4) is provided at the lower end of the annular air cavity (41) at an equal angle; The upper end of the rubber air separator (42) is connected to the annular air cavity (41) through the exhaust hole.

3. A grouting pipe embedding device for municipal engineering construction according to claim 2, characterized in that: The side wall of the gas-liquid dual-pass pipe (6) is symmetrically connected to the lower end of the exhaust pipe (9), and the upper end of the exhaust pipe (9) is connected to the annular air cavity (41); A connecting pipe (21) is provided between the grouting port of the grouting mechanism (2) and the gas-liquid dual-pass pipe (6).

4. A grouting pipe embedding device for municipal engineering construction according to claim 1, characterized in that: The side wall of the gas-liquid dual-pass pipe (6) is symmetrically connected to one end of the cone sleeve (71), and the other end of the cone sleeve (71) is connected to the upper end of the slurry outlet pipe (7); A central column (72) is fixed at the center of the cone sleeve (71), and a ball valve (73) is slidably provided on the outer wall of the central column (72); The outer wall of the ball valve (73) close to the pulp outlet pipe (7) is fitted with a push rod (8) that slides through the cone sleeve (71).

5. A grouting pipe embedding device for municipal engineering construction according to claim 4, characterized in that: A first spring (74) is wound around the outer wall of the center column (72), one end of the first spring (74) is welded to the outer wall of the ball valve (73), and the other end of the first spring (74) is fixed to the outer wall of the end of the center column (72).

6. A grouting pipe embedding device for municipal engineering construction according to claim 4, characterized in that: The jacking assembly comprises a support plate (81) fixed inside the grouting pipe (4), and a guide rod (82) is symmetrically fixed to the upper end of the support plate (81), a slider (83) is slidably provided on the outer wall of the guide rod (82), and a protrusion (85) is fixed to the upper end of the slider (83).

7. A grouting pipe embedding device for municipal engineering construction according to claim 6, characterized in that: The upper and lower ends of the push rod (8) are both hemispherical, and the upper surface of the protrusion (85) is a frustum with a convex center and two sides falling downwards, and the lower end of the push rod (8) is fitted and connected to the upper surface of the protrusion (85); The edge of the lower end of the piston rod (61) is smoothly chamfered.

8. The grouting pipe embedding device for municipal engineering construction according to claim 6, characterized in that: A second spring (84) is wound around the outer wall of the guide rod (82), one end of the second spring (84) is welded to the end of the guide rod (82), and the other end of the second spring (84) is fixed to the side wall; A limiting rod that is slidably engaged with the slider (83) is fixed to the side wall of the support plate (81).

9. The grouting pipe embedding device for municipal engineering construction according to claim 4, characterized in that: The lifting assembly further comprises a fixing plate (86) fixedly connected to the inner wall of the slurry outlet pipe (7) and the grouting pipe (4), and the lifting rod (8) slides through the fixing plate (86); A third spring (87) is wound around the outer wall of the push rod (8), one end of the third spring (87) is welded to the outer wall of the fixing plate (86), and the other end of the third spring (87) is fixed to a convex disc provided on the outer wall of the push rod (8).

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