Shield segment trepanning blowout preventer

Abstract

The utility model provides a shield segment trepanning blowout preventer, and relates to the field of shield construction. Comprising a grouting head and a blowout prevention sleeve, one end of the grouting head is provided with a grouting connector, and the grouting connector is used for being connected with a segment grouting hole; the other end of the grouting head is connected with the blowout prevention sleeve; a hole opening connector is formed in the end, away from the grouting head, of the blowout prevention sleeve, and a first sealing piece is arranged at the hole opening connector; and a pressure relief structure is arranged on the side wall of the blowout prevention sleeve. Front face plugging and side face pressure relief can be achieved, and therefore the personal safety of constructors and the safety of machine tools and equipment are protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the shield construction field, specifically, a shield segment opening anti -blowout device. BACKGROUND

[0002] In recent years, with the development of domestic urban rail transit, shield method is widely applied in track construction due to its safety, high efficiency and wide adaptability. The earth pressure balance shield is becoming the first choice for shield construction in various composite ground conditions due to its wide adaptability and strong rock breaking capacity.

[0003] During shield construction, the opening of the segment grouting hole needs to be opened when tunnel secondary grouting is carried out. When the stratum is under high water pressure, high pressure water may be sprayed out when the segment is opened, which may affect the safety of construction personnel and equipment. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a shield segment opening anti -blowout device, which can realize front plugging and side pressure relief, thereby protecting the safety of construction personnel and equipment.

[0005] The embodiment of the utility model is realized as follows:

[0006] The application embodiment provides a shield segment opening anti -blowout device, which comprises a grouting head and an anti -blowout sleeve, one end of the grouting head is provided with a grouting joint, the grouting joint is used for being connected with a segment grouting hole, the other end of the grouting head is connected with the anti -blowout sleeve.

[0007] One end of the anti -blowout sleeve away from the grouting head is provided with an opening interface, a first sealing element is arranged at the opening interface, and a pressure relief structure is arranged on the side wall of the anti -blowout sleeve.

[0008] Further, based on the foregoing scheme, the grouting head is integrally connected with a control valve, and one end of the control valve is connected with the anti -blowout sleeve.

[0009] Further, based on the foregoing scheme, one end of the anti -blowout sleeve away from the opening interface is provided with a grouting interface, the grouting interface is used for being connected with the control valve, and a second sealing element is arranged at the grouting interface.

[0010] Further, based on the foregoing scheme, the first sealing element is partially embedded in the opening interface, and the inner diameter of the first sealing element is smaller than the inner diameter of the opening interface, and the second sealing element is partially embedded in the grouting interface, and the inner diameter of the second sealing element is smaller than the inner diameter of the grouting interface.

[0011] Further, based on the foregoing scheme, the first seal and the second seal each comprise a sealing ring of silicone rubber material.

[0012] Further, based on the foregoing scheme, the grouting joint comprises a threaded joint for threaded connection with the grouting hole.

[0013] Further, based on the foregoing scheme, the opening interface and the grouting interface each comprise a threaded interface.

[0014] Further, based on the foregoing scheme, the pressure relief structure comprises a pressure relief valve.

[0015] Further, based on the foregoing scheme, the control valve comprises a ball valve.

[0016] Further, based on the foregoing scheme, the side wall of the blowout preventer sleeve is further provided with a pressure detection sensor and an alarm, and the pressure detection sensor is electrically connected with the alarm.

[0017] Compared with the prior art, the embodiments of the utility model have at least the following advantages or beneficial effects:

[0018] The grouting head and the blowout preventer sleeve are arranged, one end of the grouting head is provided with a grouting joint for connection with the segment grouting hole, the other end of the grouting head is connected with the blowout preventer sleeve, an opening interface is arranged at the end of the blowout preventer sleeve away from the grouting head, and a first seal is arranged at the opening interface, when the opening, the opening equipment is directly arranged in the opening interface, the grouting hole is bored, the first seal between the blowout preventer sleeve and the opening equipment can realize front blowout prevention and avoid high-pressure water or cement in the internal storage from being sprayed out, the pressure relief structure is arranged on the side wall of the blowout preventer sleeve, and when there is pressure water in the blowout preventer sleeve, the pressure can be relieved from the side, so that the purpose of protecting the construction personnel and the machine is achieved by the front plugging and side pressure relief. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is the overall structure schematic diagram of the shield segment opening blowout preventer device of the embodiments of the utility model;

[0021] Figure 2 It is the structure schematic diagram of the blowout preventer sleeve of the embodiments of the utility model;

[0022] Figure 3 is a sectional view of the blowout preventer sleeve of the utility model embodiment.

[0023] Icon: 1-grouting head, 11-grouting connector, 12-control valve, 2-blowout preventer sleeve, 21-borehole interface, 22-first sealing element, 23-pressure relief structure, 24-grouting interface, 25-second sealing element, 3-grouting pipe, 4-grouting hole, 5-tube piece. DETAILED DESCRIPTION

[0024] The utility model embodiments are described in detail below with reference to the drawings in the utility model embodiments.

[0025] Please refer to Figures 1-3 , it is the overall structure schematic diagram of shield segment borehole blowout preventer device,

[0026] The utility model provides a kind of shield segment borehole blowout preventer device, including grouting head 1 and blowout preventer sleeve 2, grouting head 1 one end is provided with grouting connector 11, grouting connector 11 is used to connect with grouting hole 4 on the tube piece 5;Grouting head 1 other end is connected with blowout preventer sleeve 2;

[0027] The end of blowout preventer sleeve 2 away from grouting head 1 is provided with borehole interface 21, and first sealing element 22 is arranged at borehole interface 21;The side wall of blowout preventer sleeve 2 is provided with pressure relief structure 23.

[0028] Below, a kind of shield segment borehole blowout preventer device of the present exemplary embodiment will be further described.

[0029] In some embodiments, refer to Figure 1 , above-mentioned grouting head 1 one end is provided with grouting connector 11, grouting connector 11 is used to connect with grouting hole 4 on the tube piece 5, grouting can be grouted through grouting head 1 when grouting, and grouting hole 4 can be bored through by passing grouting connector 11 when grouting hole 4 is bored through. Above-mentioned grouting head 1 other end is connected with blowout preventer sleeve 2, the end of blowout preventer sleeve 2 away from grouting head 1 is provided with borehole interface 21, and borehole interface 21 can be used to connect with borehole equipment, for grouting hole 4, such as drill bit is inserted from this borehole interface 21;And for connecting with grouting small pipe, for grouting. Above-mentioned borehole interface 21 is provided with first sealing element 22, and first sealing element 22 can realize frontal plugging when boring hole and grouting, avoid high-pressure water or slurry from this mouth spouting out when sealing borehole, cause harm to construction personnel and equipment. The side wall of above-mentioned blowout preventer sleeve 2 is provided with pressure relief structure 23, and pressure relief structure 23 can make the pressure inside blowout preventer sleeve 2 from side pressure relief, reduce internal pressure, to avoid high-pressure water flow from frontal spouting. By frontal plugging and side pressure relief mode, the safety of construction personnel and machine can be protected.

[0030] As a kind of more optimal implementation, above-mentioned pressure relief structure 23 includes pressure relief valve, convenient operation, timely pressure relief.

[0031] It should be noted that the above grouting head 1 and blowout preventer 2 can be integrally connected or detachably connected. When detachably connected, the grouting head 1 can be connected at the grouting hole 4 of the pipe segment 5 when not in use, and the blowout preventer 2 can be connected with the grouting head 1 when grouting or opening is needed.

[0032] As a more preferred embodiment, the above grouting head 1 is integrally connected with a control valve 12, and the control valve 12 is connected with one end of the blowout preventer 2. By providing the control valve 12 on the grouting head 1, the liquid inside the pipe segment 5 can be controlled to flow out through the control valve 12, and the grout flow can be controlled to be on or off through the control valve 12 when grouting. By connecting the control valve 12 with the blowout preventer 2, the on or off between the blowout preventer 2 and the grouting head 1 can be achieved, and the ball valve can be opened when opening or grouting.

[0033] Specifically, the above control valve 12 can be a ball valve, which is convenient to operate and has good sealing performance.

[0034] As a more preferred embodiment, with reference to Figure 2 The above blowout preventer 2 is provided with a grouting interface 24 at the end away from the opening interface 21, the grouting interface 24 is used to be connected with the control valve 12, and the second sealing member 25 is provided at the grouting interface 24. By also providing a sealing member at the other end of the blowout preventer 2, leakage or high-pressure water flow injection at the connection can be avoided.

[0035] As a more preferred embodiment, with reference to Figure 3 The above first sealing member 22 is partially embedded in the opening interface 21, and the inner diameter of the first sealing member 22 is smaller than the inner diameter of the opening interface 21; the second sealing member 25 is partially embedded in the grouting interface 24, and the inner diameter of the second sealing member 25 is smaller than the inner diameter of the grouting interface 24. By partially embedding the above first sealing member 22 and second sealing member 25 in the corresponding interfaces respectively, the sealing performance of the contact and the connection structure can be improved, and by setting the inner diameters of the first sealing member 22 and the second sealing member 25 to be smaller than the inner diameters of the corresponding interfaces, the first sealing member 22 and the second sealing member 25 will be squeezed when the connection structure is connected at the corresponding interface, thereby making the sealing between the corresponding interface and the connection structure more tight.

[0036] As a more preferred embodiment, the above first sealing member 22 and second sealing member 25 each include a sealing ring of silicone rubber material, which can improve the sealing performance and prevent leakage, especially when opening, the drill bit moves back and forth to open, the use of soft sealing has a certain sealing elasticity, which can improve the sealing performance with the drill bit.

[0037] As a more preferred embodiment, the above grouting joint 11 includes a threaded joint for threaded connection with the grouting hole 4, and the threaded connection is convenient to disassemble and assemble.

[0038] As a preferred embodiment, the opening interface 21 and the grouting interface 24 both comprise threaded interfaces, which are convenient to disassemble and assemble. The opening interface 21 is also provided as a threaded interface, which is convenient to connect and fix with the grouting pipe 3 during grouting, preventing the grouting pipe 3 from falling off. Since the inner diameter of the first sealing member 22 is smaller than the inner diameter of the opening interface 21, and the outer diameter of the drill bit is selected to be smaller than the inner diameter of the threaded interface, the threaded interface will not affect the back-and-forth movement of the drill bit, and can play a sealing role through the first sealing member 22.

[0039] As a preferred embodiment, the sidewall of the blowout preventer casing 2 is further provided with a pressure detection sensor and an alarm, and the pressure detection sensor is electrically connected with the alarm. The pressure of the blowout preventer casing 2 can be monitored in real time, and the alarm is alarmed, so as to adjust the size of pressure relief, avoid the phenomenon of explosion of the blowout preventer casing 2 caused by too large pressure or too small pressure relief.

[0040] In addition, unless specifically stated or limited, in the embodiments of the present application, if the terms "mount", "connect" appear, it should be understood in a broad sense. For example, "connect" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through an intermediate medium. If the terms "upper", "lower", "left", "right", "inner", "outer", "side" and other orientation terms appear, they are only the direction of the drawing or the orientation of the product when it is usually placed, and are only for the purpose of clearly describing the present application, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as a limitation on the present application. The terms "first", "second" and the like are only used for distinction in description, and cannot be understood as indicating or implying relative importance; "multiple" means at least two. In the embodiments of the present application, the relative positional relationship limitations such as parallel, perpendicular, aligned and the like are relative to the current process level, and are not strictly limited, and a small amount of deviation is allowed, such as approximately parallel, approximately perpendicular, approximately aligned and the like. For example, A is parallel to B, which means that A and B are parallel or approximately parallel, and the included angle between A and B can be between 0 degrees and 10 degrees.

[0041] The above is only some embodiments and implementations of the present application, and the protection scope of the present application is not limited thereto. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other, and any combination of features in different embodiments is also within the protection scope of the present application. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A shield segment opening blowout preventer, characterized in that, The injection head is connected with the blowout preventer casing at one end, and the other end of the blowout preventer casing is provided with an opening interface. The blowout preventer casing is provided with a pressure relief structure on the side wall.

2. The shield segment bore blowout preventer according to claim 1, characterized in that, The injection head is integrally connected with a control valve, and the control valve is connected with one end of the blowout preventer casing.

3. The shield segment bore blowout preventer according to claim 2, wherein, The blowout preventer casing is provided with an injection interface at the other end of the opening interface, the injection interface is used for being connected with the control valve, and the injection interface is provided with a second sealing element.

4. The shield segment bore blowout preventer according to claim 3, wherein, The first sealing element is partially embedded in the opening interface, and the inner diameter of the first sealing element is smaller than the inner diameter of the opening interface.

5. The shield segment opening blowout preventer according to claim 4 or 3, characterized in that The first sealing element and the second sealing element both include a sealing ring made of silicone rubber.

6. The shield segment bore blowout preventer of claim 1, wherein, The injection joint includes a threaded joint for being threadedly connected with the injection hole.

7. The shield segment bore blowout preventer of claim 3, wherein, The opening interface and the injection interface both include threaded interfaces.

8. The shield segment bore blowout preventer of claim 1, wherein, The pressure relief structure includes a pressure relief valve.

9. The shield segment bore blowout preventer of claim 2, wherein, The control valve includes a ball valve.

10. The shield segment bore blowout preventer of claim 1, wherein, The side wall of the blowout preventer casing is further provided with a pressure detection sensor and an alarm, and the pressure detection sensor is electrically connected with the alarm.

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