High-temperature and high-pressure water outburst prevention water stop device for grouting drilling

Abstract

The utility model relates to a high-temperature and high-pressure water outburst prevention water stop device for grouting and drilling, which comprises a sealing sleeve assembly, an on-off valve assembly, a header pipe, a slag discharge pipe and an orifice pipe, the on-off valve assembly comprises a first communication port, a second communication port and a switch control valve, and the first communication port is connected with the orifice pipe; the longitudinal section of the main pipe is in a T shape, the main pipe is provided with a first horizontal opening, a second horizontal opening and a third vertical opening which are communicated with one another, the sealing sleeve assembly is connected to the first horizontal opening, a second communication opening of the on-off valve assembly is connected with the second horizontal opening, and the slag discharging pipe is connected to the third vertical opening. And a slag discharge valve is arranged on the slag discharge pipe.

Description

Technical Field

[0001] This utility model relates to the field of grouting, and in particular to a high-temperature and high-pressure water anti-burst and water-stopping device for grouting drilling. Background Technology

[0002] With the increasing scale of railway construction, high-speed railway tunnels are becoming more and more common. During tunnel construction, the surrounding rock undergoes significant deformation, its stability deteriorates, and collapses occur frequently. When tunnel construction reaches fault fracture zones, the rock grade drops sharply, and these zones are often rich in groundwater, making it difficult for the original initial support design to maintain rock stability, leading to large-scale collapses. Furthermore, shallow-buried sections of tunnels have thin overburden layers and poor surrounding rock stability, making them prone to collapses and other engineering accidents during excavation. Tunnel collapses cause construction delays, damage to machinery and equipment, and increased investment costs, while also posing a significant threat to the lives of on-site construction workers. Therefore, taking certain grouting reinforcement measures is essential to ensure the stability of tunnel excavation.

[0003] In the drilling and grouting process, if a formation containing high-temperature and high-pressure water is encountered, the drilling rod's advance, the air pressure, and the inherent high pressure within the formation will cause the high-pressure and high-temperature water to gush irregularly from the borehole opening, which can cause injury to workers and cause great damage to the working environment.

[0004] In addition, the commonly used grouting materials are cement, water glass and polymers. However, cement, polymers and other grouting materials are difficult to effectively seal in the environment of high pressure and high temperature water. If grouting reinforcement is carried out directly under such conditions, it is difficult to guarantee the grouting effect and it is very easy to cause safety hazards.

[0005] For example, patent application 202321506985.6 discloses a high-temperature and high-pressure hot water tunnel anti-outburst and water-stopping combination structure. Its orifice pipe is fixedly installed at the grouting hole drilling position via a flange. The drill bit to drill rod portion of the water stop is located inside the steel pipe of the orifice pipe, with the drill bit positioned at the end of the grouting hole. The flange is fixedly connected to one end of the steel pipe. A check valve is installed at the end of the drill rod connected to the drill bit. The other end of the drill rod is connected to a pipe body via a flange, and the other end of the pipe body is connected to a three-way guide via a flange. A high-temperature and high-pressure gate valve is connected to the pipe body. An automatic control butterfly valve is connected to the three-way guide, and a slag discharge port is provided at the other end of the automatic control butterfly valve. However, the high-temperature and high-pressure hot water tunnel anti-outburst and water-stopping combination structure disclosed in this patent application has the following defects or deficiencies: the sealing between the steel pipe and the drill rod cannot be guaranteed, and high-temperature and high-pressure water easily leaks from the drill rod through the gaps in the steel pipe.

[0006] Therefore, there is an urgent need for a high-temperature and high-pressure water anti-surge and water-stopping device for grouting drilling, which can effectively control the flow direction of high-temperature and high-pressure water during the grouting drilling process, guide its flow, and prevent dangerous situations such as high-temperature and high-pressure water splashing. Utility Model Content

[0007] To address the aforementioned problems, one of the objectives of this utility model is to provide a high-temperature and high-pressure water anti-surge and water-stopping device for grouting drilling, which can safely discharge high-temperature and high-pressure water during the drilling process and cool down the grout during the grouting process to ensure that the grout solidifies at a normal temperature.

[0008] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a high-temperature and high-pressure water anti-surge and water-stopping device for grouting drilling, characterized in that it includes a sealing sleeve assembly, an on / off valve assembly, a main pipe, a slag discharge pipe, and a borehole pipe, wherein,

[0009] The on / off valve assembly includes a first connection port, a second connection port, and a switch control valve, wherein the first connection port is connected to the orifice pipe;

[0010] The longitudinal section of the main pipe is T-shaped. The main pipe is provided with a first horizontal port, a second horizontal port and a third vertical port that are connected to each other. The sealing sleeve assembly is connected to the first horizontal port. The second connecting port of the on / off valve assembly is connected to the second horizontal port. The slag discharge pipe is connected to the third vertical port and is provided with a slag discharge valve.

[0011] The sealing sleeve assembly includes a coaxially arranged flange short pipe, a necked flange, a sealing ring, and a limiting sliding module.

[0012] The longitudinal section of the flange short pipe is I-shaped, including: a bottom flange, a top flange, and a connecting ring connecting the bottom flange and the top flange;

[0013] The longitudinal section of the necked flange is T-shaped, including: a head flange and a neck ring body perpendicularly connected to the head flange, wherein the neck ring body is inserted into the connecting ring body from the top flange;

[0014] Both the sealing ring and the limiting sliding module are disposed in the connecting ring body and located in the space formed by the bottom flange and the neck ring body. The sealing ring includes a first sealing part and a second sealing part. The limiting sliding module is disposed between the first sealing part and the second sealing part. The first sealing part is attached to the bottom flange, and the second sealing part is attached to the neck ring body.

[0015] In some embodiments, a first ball valve and a second ball valve are provided on the orifice pipe adjacent to the side of the on / off valve assembly, the first ball valve and the second ball valve being symmetrically arranged along the centerline of the orifice pipe.

[0016] In some implementations, the first ball valve is connected to a grouting pump, and the second ball valve is connected to a water injection pump.

[0017] In some implementations, the bottom flange, the top flange, and the head flange are all provided with matching threaded holes.

[0018] In some embodiments, the middle outer side wall of the limiting sliding module is formed with an annular groove to form a limiting cavity with the inner wall of the connecting ring body; the bottom of the neck ring body is provided with an annular step, the diameter of the annular step being smaller than the diameter of the neck ring body, so that the outer side wall of the annular step forms an annular cavity with the inner wall of the connecting ring body.

[0019] In some embodiments, the connecting ring body is provided with two oil injection nozzles, one of which corresponds to the limiting cavity and the other to the annular cavity.

[0020] In some implementations, the limiting sliding module is provided with several radial through holes.

[0021] Therefore, by injecting lubricating oil through the grease nipple, the limiting cavity and the annular cavity can not only store lubricating oil, but also, during operation, the lubricating oil can flow to the sealing ring through the radial through hole, thereby playing a lubricating role.

[0022] In some embodiments, the on / off valve assembly has a valve plate inside, and the on / off control valve includes a handwheel and a valve stem connected to the handwheel to control the opening and closing state of the valve plate.

[0023] In some implementations, the slag discharge valve is a butterfly valve.

[0024] This utility model, by adopting the above technical solutions, has achieved at least the following technical effects: (1) It can cool and drain high-temperature and high-pressure water, ensuring the safe discharge of high-temperature and high-pressure hot water during drilling construction; (2) It can reduce the ambient temperature during grouting, improving construction safety; (3) After the drill bit and drill rod enter the sealing sleeve assembly, the head flange and top flange are tightened with screws. Under the action of force, the head flange squeezes the sealing ring, making the sealing ring and drill rod fit tightly together, achieving a state where the drill rod can rotate without causing high-temperature and high-pressure water to leak from this opening; (4) When the bolts tighten the flange and the sealing ring is under force, the sliding module will push against the sealing ring, giving it a reverse force, so that the sealing ring will not be displaced, thereby better squeezing the sealing ring and playing a good sealing role; (5) The limiting cavity and annular cavity are used to store lubricating oil. The lubricating oil can flow to the sealing ring through the radial through hole, playing a lubricating role, making the drill bit and drill rod Z more lubricated and fit together during the movement. Attached Figure Description

[0025] Figure 1This invention provides a three-dimensional structural schematic diagram of a high-temperature and high-pressure water anti-surge and water-stopping device for grouting drilling.

[0026] Figure 2 A schematic diagram of the on / off valve assembly provided by this utility model is shown;

[0027] Figure 3 A schematic diagram of the sealing sleeve assembly provided by this utility model is shown.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1-Sealing sleeve assembly, 11-Flange short pipe, 111-Bottom flange, 112-Top flange, 113-Connecting ring body, 114-Oil injector, 115-Oil injector, 12-Neck flange, 121-Head flange, 122-Neck ring body, 123-Annular step, 13-Sealing ring, 131-First sealing part, 132-Second sealing part, 14-Limiting sliding module, 141-Radial through hole, 2 - On / off valve assembly, 21-First connecting port, 22-Second connecting port, 23-Switch control valve, 231-Handwheel, 232-Valve stem, 24-Valve plate, 3-Main pipe, 31-First horizontal port, 32-Second horizontal port, 33-Third vertical port, 4-Slag discharge pipe, 41-Slag discharge valve, 5-Orifice pipe, 51-First ball valve, 52-Second ball valve, Z-Drill bit drill rod, K1-Limiting cavity, K2-Annular cavity. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "positive," "negative," "front," and "rear," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the use of terms such as "first" and "second" to define components is merely for the convenience of distinguishing the aforementioned components. Unless otherwise stated, these terms have no special meaning and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] As a non-limiting implementation, such as Figures 1 to 3 As shown, the high-temperature and high-pressure water anti-surge and water-stopping device for grouting drilling of this utility model includes a sealing sleeve assembly 1, an on / off valve assembly 2, a main pipe 3, a slag discharge pipe 4, and a borehole pipe 5.

[0034] The on / off valve assembly 2 includes a first connection port 21, a second connection port 22, and a switch control valve 23. The first connection port 21 is connected to the orifice pipe 5.

[0035] In this non-limiting embodiment, such as Figure 2 As shown, the on / off valve assembly 2 has a valve plate 24 inside, and the on / off control valve 23 includes a handwheel 231 and a valve stem 232. The valve stem 232 is connected to the handwheel 231 and controls the opening and closing state of the valve plate 24, thereby realizing the opening and closing state of the on / off valve assembly 2 through the external handwheel 232.

[0036] In use, the on / off valve assembly 2 can be continuously installed on the orifice pipe 5 and controlled by the handwheel 231 during drilling and grouting operations until the grouting of this hole is completed. Then, the on / off valve assembly 2 is disassembled and installed on other orifice pipes to be drilled and grouted, thus achieving cyclic use.

[0037] The main pipe 3 is T-shaped and has a first horizontal port 31, a second horizontal port 32 and a third vertical port 33 that are connected to each other. The sealing sleeve assembly 1 is connected to the first horizontal port 31. The second connecting port 22 of the on / off valve assembly 2 is connected to the second horizontal port 32. The slag discharge pipe 4 is connected to the third vertical port 33. The slag discharge pipe 4 is equipped with a butterfly valve as a slag discharge valve 41. The slag discharge pipe 4 is the path for the discharge of high-temperature and high-pressure water and slag. The slag discharge valve 41 can be opened or closed according to the construction situation to allow the high-temperature and high-pressure water and slag to be discharged in a safe state.

[0038] In another non-limiting embodiment, a first ball valve 51 and a second ball valve 52 are provided on the orifice pipe 5 adjacent to the on / off valve assembly 2. The first ball valve 51 and the second ball valve 52 are symmetrically arranged along the center line of the orifice pipe 5. In this non-limiting embodiment, both the first ball valve and the second ball valve are 1-inch ball valves. Grout is injected on one side and cold water is injected on the other side, so that the grout solidifies at a normal temperature.

[0039] Based on the first ball valve 51 and the second ball valve 52, the on / off valve assembly 2 can be opened during drilling operations and closed when not operating, so that the high-pressure and high-temperature water in the hole will not leak out and will not affect grouting.

[0040] As another non-limiting implementation, such as Figure 3 As shown, the sealing sleeve assembly 1 includes a flange short pipe 11, a neck flange 12, a sealing ring 13, and a limiting sliding module 14 arranged coaxially.

[0041] The longitudinal section of the flange short pipe 11 is I-shaped, including a bottom flange 111, a top flange 112, and a connecting ring 113. The longitudinal section of the neck flange 12 is T-shaped, including a head flange 121 and a neck ring 122, with the neck ring 122 inserted into the connecting ring 113 from the top flange 112. The sealing ring 13 and the limiting sliding module 14 are both disposed in the connecting ring 113 and located in the space formed by the bottom flange 111 and the neck ring 122. The sealing ring 13 includes a first sealing part 131 and a second sealing part 132, and the limiting sliding module 14 is disposed between the first sealing part 131 and the second sealing part 132. The first sealing part 131 is attached to the bottom flange 111, and the second sealing part 132 is attached to the neck ring 122.

[0042] like Figure 3 As shown, the bottom flange 111, top flange 112, and head flange 121 are all provided with matching threaded holes, allowing for fastening with bolts. An annular groove (not labeled in the figure) is formed on the outer wall of the middle portion of the limiting sliding module 14, forming a limiting cavity K1 with the inner wall of the connecting ring 113. An annular step 123 is provided at the bottom of the neck ring 122, with a diameter smaller than that of the neck ring 122. Thus, the outer wall of the annular step and the inner wall of the connecting ring 122 form an annular cavity K2. The limiting sliding module 14 has several radial through holes 141, and the connecting ring 113 has two grease fittings 114 and 115. Grease fitting 114 corresponds to the limiting cavity K1, and grease fitting 115 corresponds to the annular cavity K2.

[0043] Therefore, during use, the sealing sleeve assembly 1 serves as the "inlet" of the drill bit and drill rod in the entire high-temperature and high-pressure water anti-surge and water-stopping device for grouting boreholes. After the drill bit and drill rod enter the sealing sleeve assembly 1, the head flange 121 and the top flange 112 are tightened with screws. Under the action of force, the head flange 121 squeezes the second sealing part 132 and the first sealing part 131 of the purple sealing ring 13, so that the purple sealing ring 13 and the drill rod Z fit tightly together, achieving a state in which the drill rod Z can rotate without causing the high-temperature and high-pressure water to leak from this opening.

[0044] The limiting sliding module 14 is made of rigid material, while the sealing ring 13 is made of elastic material. If the sealing ring is placed entirely within the connecting ring body 113, it is highly susceptible to extrusion deformation and detachment from the connecting pipe body when the bolts are tightened and the sealing ring is under stress. Therefore, by placing the sliding module between the first and second sealing parts, when the bolts tighten the sealing ring and force is applied, the sliding module will abut against the sealing ring, applying a counterforce to prevent the sealing ring 13 from shifting, thus better sealing the sealing ring and achieving a good sealing effect. In addition, the radial through hole 141 provided on the limiting sliding module 14 allows lubricating oil to be injected through the grease nipple and enter the location of the sealing ring 13, making the drill bit and drill rod Z more lubricated and closely fitted during movement.

[0045] In this non-limiting embodiment, the neck flange 12, the sealing ring 13, and the limiting sliding module 14 are all detachable movable components.

[0046] When installing the high-temperature and high-pressure water anti-surge and water-stopping device for grouting drilling of this utility model, first install the orifice pipe 5, then install the on / off valve assembly 2 on the orifice pipe 5, then connect the main pipe 3 to the on / off valve assembly 2, and then connect the sealing sleeve assembly to the main pipe 3.

[0047] After installation, the on / off valve assembly 2 of this utility model for grouting drilling anti-surge and water-stopping device is in the closed state, while the slag discharge valve 41 can be in the open state as needed. After the drill bit and drill rod Z are inserted into the sealing sleeve, the bolts on the orange head flange 121 and the gray top flange 112 are tightened to ensure that the purple sealing ring 13 and the drill bit and drill rod Z are tightly fitted. Then, the on / off valve assembly 2 is opened, and drilling can proceed. The high-temperature and high-pressure water is discharged through the slag discharge pipe 4. After drilling is completed, the drill bit and drill rod Z are retracted to the position of the slag discharge pipe 4, the on / off valve assembly 2 is closed, the bolts on the sealing sleeve assembly 1 are removed, and the drill bit and drill rod Z are withdrawn. Then, grout is injected through the first ball valve 51, and cold water is injected through the second ball valve 52 on the other side to allow the grout to solidify at a normal temperature.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-temperature and high-pressure water anti-burst and water-stopping device for grouting drilling, characterized in that, This includes a sealing sleeve assembly, an on / off valve assembly, a main pipe, a slag discharge pipe, and an orifice pipe, among which, The on / off valve assembly includes a first connection port, a second connection port, and a switch control valve, wherein the first connection port is connected to the orifice pipe; The longitudinal section of the main pipe is T-shaped. The main pipe is provided with a first horizontal port, a second horizontal port and a third vertical port that are connected to each other. The sealing sleeve assembly is connected to the first horizontal port. The second connecting port of the on / off valve assembly is connected to the second horizontal port. The slag discharge pipe is connected to the third vertical port and is provided with a slag discharge valve. The sealing sleeve assembly includes a coaxially arranged flange short pipe, a necked flange, a sealing ring, and a limiting sliding module. The longitudinal section of the flange short pipe is I-shaped, including: a bottom flange, a top flange, and a connecting ring connecting the bottom flange and the top flange; The longitudinal section of the necked flange is T-shaped, including: a head flange and a neck ring body perpendicularly connected to the head flange, wherein the neck ring body is inserted into the connecting ring body from the top flange; Both the sealing ring and the limiting sliding module are disposed in the connecting ring body and located in the space formed by the bottom flange and the neck ring body. The sealing ring includes a first sealing part and a second sealing part. The limiting sliding module is disposed between the first sealing part and the second sealing part. The first sealing part is attached to the bottom flange, and the second sealing part is attached to the neck ring body.

2. The high-temperature and high-pressure water anti-burst and water-stopping device for grouting drilling according to claim 1, characterized in that, A first ball valve and a second ball valve are provided on the orifice pipe adjacent to the side of the on / off valve assembly, and the first ball valve and the second ball valve are symmetrically arranged along the center line of the orifice pipe.

3. The high-temperature and high-pressure water anti-burst and water-stopping device for grouting drilling according to claim 2, characterized in that, The first ball valve is connected to the grouting pump, and the second ball valve is connected to the water injection pump.

4. The high-temperature and high-pressure water anti-burst and water-stopping device for grouting drilling according to claim 1 or 2, characterized in that, The bottom flange, the top flange, and the head flange are all provided with matching threaded holes.

5. The high-temperature and high-pressure water anti-burst and water-stopping device for grouting drilling according to claim 4, characterized in that, The middle outer wall of the limiting sliding module has an annular groove to form a limiting cavity with the inner wall of the connecting ring; the bottom of the neck ring is provided with an annular step, the diameter of which is smaller than the diameter of the neck ring, so that the outer wall of the annular step forms an annular cavity with the inner wall of the connecting ring.

6. The high-temperature and high-pressure water anti-burst and water-stopping device for grouting drilling according to claim 5, characterized in that, The connecting ring body is provided with two oil injection nozzles, one of which corresponds to the limiting cavity and the other to the annular cavity.

7. The high-temperature and high-pressure water anti-burst and water-stopping device for grouting drilling according to claim 6, characterized in that, The limiting sliding module is provided with several radial through holes.

8. The high-temperature and high-pressure water anti-burst and water-stopping device for grouting drilling according to claim 1, characterized in that, The on / off valve assembly has a valve plate inside, and the switch control valve includes a handwheel and a valve stem connected to the handwheel to control the opening and closing state of the valve plate.

9. The high-temperature and high-pressure water anti-burst and water-stopping device for grouting drilling according to claim 1, characterized in that, The slag discharge valve is a butterfly valve.

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