Pipe piece wall back grouting device

Abstract

The utility model provides a grouting device behind a duct piece wall. The grouting device comprises a ball valve, a three-way ball valve, a grouting pipe and a grouting head. The first end of the ball valve is connected with a duct piece preformed hole, the first end of the three-way ball valve is connected with the second end of the ball valve, and the second end of the three-way ball valve is used for pressure relief. The grouting pipe is inserted into the ball valve and the three-way ball valve, the grouting pipe is sleeved with a blowout prevention device, and the first end of the blowout prevention device is connected with the third end of the three-way ball valve. The side face of the first end of the grouting head is provided with a groove, and the second end of the grouting head is connected with the first end of the grouting pipe. According to the grouting device, the problems existing in traditional grouting operation are effectively solved, and the efficiency and safety of grouting operation are improved.

Description

Technical Field

[0001] The utility model relates to the field of rail transportation, in particular to a bidirectional grouting device for pre-reserving hole walls of tunnel segments. Background Art

[0002] The original segment pre-hole wall grouting method primarily relied on a hose connected to a ball valve and then connected to the pre-hole for the injection of polyurethane slurry. Under this traditional method, the slurry, after being injected, would flow into the cracks in the soil layer outside the segment. To cause the slurry to foam and expand upon contact with water, thereby addressing the problem of segment leakage, the commonly adopted strategy is to increase the grouting volume and cover the leaking area in a spot-on manner. However, this approach has significant drawbacks: it cannot achieve precise, targeted plugging based on the actual distribution of segment leakage, meaning it cannot "prescribe the right medicine for the right disease," resulting in excessive use and waste of slurry.

[0003] Even more challenging is that after repeated back-of-wall grouting at the same location, a large amount of polyurethane foam solids accumulate behind the reserved hole wall. These solids pose a significant challenge to subsequent grouting operations. On the one hand, they can block the grouting channel, preventing smooth injection of slurry. On the other hand, even if injection is possible, the partial blockage of the grouting channel may cause an abnormal increase in grouting pressure, which not only affects the smooth progress of the plugging operation but also weakens the actual effectiveness of the plugging treatment.

[0004] In view of the above problems, it is particularly urgent to improve the existing back-wall grouting method. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes a bidirectional grouting device after the tunnel segment pre-reserved hole wall, aiming to improve the flexibility and safety of the grouting operation.

[0006] The utility model proposes a segment wall back grouting device, which includes:

[0007] A ball valve, wherein a first end of the ball valve is connected to the reserved hole of the pipe segment;

[0008] a three-way ball valve, wherein a first end of the three-way ball valve is connected to a second end of the ball valve, and the second end of the three-way ball valve is used for pressure relief;

[0009] A grouting pipe, the grouting pipe is inserted into the ball valve and the three-way ball valve, the grouting pipe is provided with a blowout preventer, and the first end of the blowout preventer is connected to the third end of the three-way ball valve;

[0010] A grouting head, wherein a first end of the grouting head is grooved on a side surface, and a second end of the grouting head is connected to the first end of the grouting pipe.

[0011] In one embodiment, the first end of the blowout preventer is threadedly connected to the third end of the three-way ball valve, and the outer thread provided on the first end of the blowout preventer matches the inner thread provided on the third end of the three-way ball valve.

[0012] In one embodiment, the blowout preventer is provided with an elastic member, which is located at the gap between the blowout preventer and the grouting pipe and seals the gap between the blowout preventer and the grouting pipe through deformation of the elastic member.

[0013] In one embodiment, the elastic member is rubber.

[0014] In one embodiment, the blowout preventer is an outer cross blowout preventer.

[0015] In one embodiment, the three-way ball valve comprises a three-way ball valve body and a pressure relief part, the first end of the three-way ball valve body is connected to the second end of the ball valve, the second end of the three-way ball valve body is detachably connected to the pressure relief part, the third end of the three-way ball valve body is connected to the first end of the blowout preventer, and the pressure relief part is provided with a valve.

[0016] In one embodiment, the grouting pipe comprises a plurality of sub-grouting pipes, and the plurality of sub-grouting pipes are detachably connected.

[0017] In one embodiment, the grouting head comprises a grouting head top, a grouting head middle part and a grouting head bottom, the grouting head top is located at the first end of the grouting head, the grouting head bottom is located at the second end of the grouting head, the grouting head middle part is located between the grouting head top and the grouting head bottom, the grouting head top is a conical body, and the grouting head middle part and the grouting head bottom are both cylindrical bodies.

[0018] In one embodiment, the side surface of the grouting head top is slotted, the bottom diameter of the conical body is equal to the outer diameter of the grouting head middle part, and the outer diameter of the grouting head bottom is smaller than the outer diameter of the grouting head middle part.

[0019] In one embodiment, the grouting pipe comprises a first sub-grouting pipe and a second sub-grouting pipe, the first sub-grouting pipe comprises a first part and a second part, the outer diameter of the first part is equal to the outer diameter of the grouting head middle part, the inner diameter of the first end of the first part matches the outer diameter of the grouting head bottom, the first end of the first part is insertedly connected to the grouting head bottom, the second end of the first part is connected to the first end of the second part, and the outer diameter of the second part is smaller than the outer diameter of the first part.

[0020] The outer diameter of the second sub grouting pipe is equal to the outer diameter of the first part, the inner diameter of the first end of the second sub grouting pipe matches the outer diameter of the second part, and the second part is insertedly connected with the first end of the second sub grouting pipe.

[0021] The first end of the first part of the first sub grouting pipe is the first end of the grouting pipe, and the second end of the second sub grouting pipe is the second end of the grouting pipe.

[0022] In one embodiment, the second end of the grouting pipe is connected with an external ball valve.

[0023] The segment wall back grouting device has the following beneficial effects:

[0024] 1. Improved grouting flexibility: by slotted and rotating adjustment of the grouting pipe end, precise grouting plugging is achieved, and slurry waste is reduced.

[0025] 2. Solve the problem of grouting pipe blockage: the multi-section detachable design facilitates replacement of part of the grouting pipe when the grouting pipe is blocked, improving the efficiency of grouting operation.

[0026] 3. Improved safety: a tee ball valve is added between the reserved hole ball valve and the blowout preventer for pressure relief after grouting is completed, avoiding the risk of pipe pulling and grouting after grouting due to excessive external pressure of the tunnel segment.

[0027] 4. Simple structure and easy operation: the grouting pipe structure of the application is simple, easy to operate and maintain, and suitable for environments where the effect of subway tunnel construction plugging is not ideal. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a side view schematic diagram of the overall structure of the segment wall back grouting device of an embodiment of the utility model;

[0029] Figure 2 is a structure schematic diagram of the grouting head and the first sub grouting pipe of an embodiment of the utility model;

[0030] Figure 3 is a front view schematic diagram of the segment wall back grouting device of an embodiment of the utility model;

[0031] Figure 4 is a side view schematic diagram of the rear half structure of the segment wall back grouting device of an embodiment of the utility model;

[0032] Figure 5 is a schematic diagram of the segment wall back grouting device of an embodiment of the utility model passing through the segment reserved hole.

[0033] REFERENCE NUMERALS

[0034] Ball valve 1, three-way ball valve 2, grouting pipe 3, first sub-grouting pipe 31, second sub-grouting pipe 32, blowout prevention device 4, sealing element 41, grouting head 5, external ball valve 6. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] The utility model proposes a segment wall back grouting device, such as Figure 1 As shown, the grouting device includes: a ball valve 1, a three-way ball valve 2, a grouting pipe 3, and a grouting head 5. The first end of the ball valve 1 is connected to the reserved hole of the pipe segment, the first end of the three-way ball valve 2 is connected to the second end of the ball valve 1, and the second end of the three-way ball valve 2 is used for pressure relief. The grouting pipe 3 is inserted into the ball valve 1 and the three-way ball valve 2. A blowout preventer 4 is provided on the grouting pipe 3. The first end of the grouting head 5 is grooved on the side, and the second end of the grouting head 5 is connected to the first end of the grouting pipe 3. The grouting direction is controlled by axially rotating the grouting pipe 3 to change the flow direction of the slurry outside the pipe segment.

[0037] Furthermore, the first end of the blowout preventer 4 is threadedly connected to the third end of the three-way ball valve 2 , and the external thread provided on the first end of the blowout preventer 4 matches the internal thread provided on the third end of the three-way ball valve 2 .

[0038] Furthermore, the blowout prevention device 4 has a built-in seal 41, which is located at the gap between the blowout prevention device 4 and the grouting pipe 3. The gap between the blowout prevention device 4 and the grouting pipe 3 is sealed by the deformation of the seal 41. Figure 5 In this embodiment, the sealing member 41 is made of rubber. In this embodiment, the blowout preventer is preferably an outer cross blowout preventer, which seals the gap between the blowout preventer and the grouting pipe by deforming the rubber to prevent slurry leakage during grouting.

[0039] Furthermore, the three-way ball valve 2 includes a three-way ball valve body and a pressure relief portion. The first end of the three-way ball valve body is connected to the second end of the ball valve 1, the second end of the three-way ball valve body is detachably connected to the pressure relief portion, and the third end of the three-way ball valve body is connected to the first end of the blowout preventer 4. A valve is provided on the pressure relief portion, see Figure 1 、 Figure 3 and Figure 4 The detachable connection facilitates regular inspection of the pressure relief valve's operating status, ensuring its reliable performance and further improving system safety. Furthermore, the detachable connection makes it simple and convenient to replace different types of pressure relief valves under different operating conditions, improving the adaptability and flexibility of the equipment.

[0040] Further, the grouting pipe 3 comprises a plurality of sub-grouting pipes which are detachably connected. The multi-section detachable design facilitates replacement of part of the grouting pipe when the grouting pipe 3 is blocked, solving the problem of grouting pipe blockage.

[0041] As shown in Figure 2 , the grouting head 5 comprises a grouting head top, a grouting head middle part and a grouting head bottom. The grouting head top is located at the first end of the grouting head 5, the grouting head bottom is located at the second end of the grouting head 5, and the grouting head middle part is located between the grouting head top and the grouting head bottom. The grouting head top is a conical body, and the grouting head middle part and the grouting head bottom are both cylindrical bodies. Among them, the side surface of the grouting head top is slotted, the bottom diameter of the conical body is equal to the outer diameter of the grouting head middle part, and the outer diameter of the grouting head bottom is smaller than the outer diameter of the grouting head middle part.

[0042] As shown in Figure 1 and Figure 2 , the grouting pipe 3 comprises a first sub-grouting pipe 31 and a second sub-grouting pipe 32. The first sub-grouting pipe 31 comprises a first part and a second part. The outer diameter of the first part is equal to the outer diameter of the grouting head middle part, the inner diameter of the first end of the first part matches the outer diameter of the grouting head bottom, and the first end of the first part is insertedly connected with the grouting head bottom. The second end of the first part is connected with the first end of the second part, and the outer diameter of the second part is smaller than the outer diameter of the first part. The outer diameter of the second sub-grouting pipe 32 is equal to the outer diameter of the first part, the inner diameter of the first end of the second sub-grouting pipe 32 matches the outer diameter of the second part, and the second part is insertedly connected with the first end of the second sub-grouting pipe 32. Among them, the first end of the first part of the first sub-grouting pipe 31 is the first end of the grouting pipe 3, and the second end of the second sub-grouting pipe 32 is the second end of the grouting pipe.

[0043] As shown in Figure 1 and Figure 4 , an external ball valve 6 is connected to the second end of the grouting pipe, and the slurry is injected through the external ball valve 6. The external ball valve 6 controls whether to carry out grouting, and by opening or closing the ball valve, the injection and stop of the slurry can be accurately controlled. In the grouting operation, the pressure and flow of the slurry are important parameters that need to be strictly controlled. The addition of the ball valve provides additional safety protection for the grouting process. In the case of abnormal conditions such as slurry leakage or grouting pipe rupture, the ball valve can be quickly closed to cut off the grouting channel, prevent the accident from expanding, and protect the safety of construction personnel and equipment. The external ball valve and the second end of the grouting pipe are connected through a connecting piece to prevent the slurry from spilling.

[0044] The working principle of the tunnel segment reserved hole wall rear bidirectional grouting device of an embodiment of the utility model is as follows:

[0045] The reserved hole connects the ball valve 1, then connects the three-way ball valve 2, inserts the threaded multi-section detachable grouting pipe 3 provided with the blowout preventer 4, rotates the grouting pipe 3 to adjust the direction of grouting, tightens the blowout preventer 4, extrudes the rubber inside the device, closes the gap between the blowout preventer 4 and the grouting pipe 3 through the deformation of the rubber, connects the grouting head 5 to carry out the back wall grouting operation.

[0046] The pipe piece back grouting device has the following beneficial effects:

[0047] 1. Improve grouting flexibility: through the slotted end of the grouting pipe and the rotation adjustment of the grouting direction, precise grouting plugging is realized, and slurry waste is reduced.

[0048] 2. Solve the problem of grouting pipe blockage: the multi-section detachable design facilitates the replacement of part of the grouting pipe when the grouting pipe is blocked, thereby improving the efficiency of grouting operation.

[0049] 3. Improve safety: the three-way ball valve between the reserved hole ball valve and the blowout preventer is used for pressure relief after grouting is completed, thereby avoiding the risk of pipe pulling and grouting after grouting due to excessive external pressure of the tunnel pipe piece.

[0050] 4. Simple structure and easy operation: the grouting pipe structure of the application is simple, easy to operate and maintain, and is suitable for environments where the effect of subway tunnel construction plugging is not ideal.

[0051] It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" and the like used in the description of the application should be interpreted broadly, for example, the connection can be fixed connection, or detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal connection of two elements, and those skilled in the art can understand the specific meaning of the terms in the application according to the specific circumstances. In addition, the terms "first", "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0052] The above-described embodiments are only further descriptions of the utility model and do not limit the utility model in other forms. The utility model can have other various embodiments. Those skilled in the art can make various corresponding modifications and changes according to the utility model without departing from the spirit and essence of the utility model.

Claims

1. A device for backfilling of a segment wall, characterized in that The grouting device comprises: a ball valve, a first end of the ball valve being connected with a pipe piece reserved hole; a three-way ball valve, a first end of the three-way ball valve being connected with a second end of the ball valve, a second end of the three-way ball valve being used for pressure relief; a grouting pipe, the grouting pipe being inserted into the ball valve and the three-way ball valve, an anti-blowout device being sleeved on the grouting pipe, a first end of the anti-blowout device being connected with a third end of the three-way ball valve; a grouting head, a side surface of a first end of the grouting head being slotted, a second end of the grouting head being connected with a first end of the grouting pipe.

2. The segmental wall post- grouting device according to claim 1, characterized in that, The first end of the anti-blowout device is threadedly connected with the third end of the three-way ball valve, the external thread provided on the first end of the anti-blowout device and the internal thread provided on the third end of the three-way ball valve are matched with each other.

3. The segmental wall post- grouting device according to claim 1, characterized in that, The anti-blowout device is internally provided with an elastic member, the elastic member is located at a gap between the anti-blowout device and the grouting pipe, and the gap between the anti-blowout device and the grouting pipe is closed by deformation of the elastic member.

4. The segmental wall post- grouting device according to claim 3, characterized in that, The elastic member is rubber.

5. The segmental wall post- injection grouting device according to claim 1, wherein, The anti-blowout device is an external cross anti-blowout device.

6. The segmental wall post- injection grouting device according to claim 1, wherein, The three-way ball valve comprises a three-way ball valve body and a pressure relief part, a first end of the three-way ball valve body being connected with a second end of the ball valve, a second end of the three-way ball valve body being detachably connected with the pressure relief part, a third end of the three-way ball valve body being connected with a first end of the anti-blowout device, and the pressure relief part being provided with a valve.

7. The segmental wall post- injection grouting device according to claim 1, wherein The grouting pipe comprises a plurality of sub-grouting pipes, and the plurality of sub-grouting pipes are detachably connected.

8. The segmental wall post- injection grouting device according to claim 1, wherein, The grouting head comprises a grouting head top, a grouting head middle part and a grouting head bottom, the grouting head top being located at a first end of the grouting head, the grouting head bottom being located at a second end of the grouting head, the grouting head middle part being located between the grouting head top and the grouting head bottom, the grouting head top being a conical body, and the grouting head middle part and the grouting head bottom being cylindrical bodies. The side surface of the grouting head top is slotted, the bottom diameter of the conical body is equal to the external diameter of the grouting head middle part, and the external diameter of the grouting head bottom is smaller than the external diameter of the grouting head middle part.

9. The segmental wall post- injection grouting device according to claim 8, wherein, The grouting pipe comprises a first sub-grouting pipe and a second sub-grouting pipe, the first sub-grouting pipe comprises a first part and a second part, the external diameter of the first part is equal to the external diameter of the grouting head middle part, the internal diameter of a first end of the first part is matched with the external diameter of the grouting head bottom, the first end of the first part is insertedly connected with the grouting head bottom, a first end of the second part is connected with a second end of the first part, and the external diameter of the second part is smaller than the external diameter of the first part. The external diameter of the second sub-grouting pipe is equal to the external diameter of the first part, the internal diameter of a first end of the second sub-grouting pipe is matched with the external diameter of the second part, and the second part is insertedly connected with the first end of the second sub-grouting pipe. The first end of the first part of the first sub-grouting pipe is the first end of the grouting pipe, and the second end of the second sub-grouting pipe is the second end of the grouting pipe.

10. The segmental wall post- injection grouting device according to claim 1, wherein, An external ball valve is connected with the second end of the grouting pipe.

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