Self-expansion type grouting hole sealing device

Abstract

The utility model relates to the technical field of hole drilling and grouting, and particularly discloses a self-expansion type grouting and hole sealing device which comprises a grouting pipe, the rear end of the grouting pipe is connected with a pressurizing cylinder, a switch valve is installed on a pipe body, an elastic rubber sleeve is fixedly sleeved outside the pipe body, and an inflation interlayer is formed between the elastic rubber sleeve and the grouting pipe. An elastic air bag is arranged in the pressurizing cylinder and connected with the inflation interlayer through an air conveying pipeline, and a one-way valve only allowing air in the elastic air bag to flow into the inflation interlayer is arranged on the air conveying pipeline. The elastic air bag and the inflation interlayer are connected with two connectors of a three-way valve, and the other connector of the three-way valve is communicated with the atmosphere. According to the self-expansion type grouting hole sealing device, the elastic rubber sleeve is driven to expand through grout pressure, the good hole sealing effect is achieved, manual driving is not needed, additional pressure equipment does not need to be arranged, and the self-expansion type grouting hole sealing device is efficient, convenient and low in implementation cost. The self-expansion type grouting hole sealing device is compact in structure, high in flexibility and good in applicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drilling grouting technical field especially, relates to a self expanding type grouting hole sealing device. BACKGROUND

[0002] In engineering drilling grouting construction, the grouting hole sealing device is used for plugging the orifice of the drilling hole to maintain the grouting pressure, and is widely used in technical fields such as geological exploration, gas extraction and geotechnical engineering reinforcement. At present, the hole sealing principle of commonly used grouting hole sealing devices mainly includes two types: one type is to set high-elastic rubber plugs on the grouting pipe and screw rod driving mechanisms for driving the high-elastic rubber plugs to deform, and the hole sealing is realized by the elastic deformation of the high-elastic rubber plugs. This type of grouting hole sealing device needs manual continuous operation of the screw rod during use, which is labor-intensive, low in work efficiency, and prone to sealing problems due to manual operation. SUMMARY

[0003] To overcome the deficiencies of the prior art, the utility model provides a self expanding type grouting hole sealing device which does not need manual operation and does not need additional pressure equipment, aiming at solving the technical problems of the existing grouting hole sealing devices that need manual operation, are time-consuming and labor-intensive, or need additional pressure equipment, and have poor convenience and flexibility.

[0004] To achieve the above technical purposes, the utility model adopts the following technical scheme:

[0005] A self expanding type grouting hole sealing device, comprising a grouting pipe, the front end of the grouting pipe being a liquid outlet, the rear end of the grouting pipe being connected with a pressurizing cylinder, a switch valve being arranged on the grouting pipe, an elastic rubber sleeve being fixedly sleeved outside the grouting pipe, and a closed air-filled interlayer being formed between the elastic rubber sleeve and the grouting pipe; a liquid inlet connector being arranged at the rear end of the pressurizing cylinder, an elastic air bag being arranged inside the pressurizing cylinder, the elastic air bag being connected with the air-filled interlayer through a gas conveying pipeline, and a one-way valve being arranged on the gas conveying pipeline, which allows only the air inside the elastic air bag to flow into the air-filled interlayer; the elastic air bag and the air-filled interlayer are respectively connected with two connectors of a three-way valve, and the other connector of the three-way valve is in communication with the atmosphere.

[0006] Further, the grouting pipe and the pressurizing cylinder are made of metal material, the elastic rubber sleeve is made of one of nitrile rubber, neoprene rubber and silicone rubber, the elastic air bag is made of one of high-elastic silicone rubber, polyurethane composite material and carbon fiber reinforced rubber.

[0007] Further, the installation position of the switch valve is between the pressurizing cylinder and the elastic rubber sleeve; similarly, the installation position of the three-way valve is also between the pressurizing cylinder and the elastic rubber sleeve.

[0008] Further, a handle is arranged on the grouting pipe and the pressurizing cylinder, and the handle is located at the rear side of the elastic rubber sleeve.

[0009] Further, an annular boss is arranged on the grouting pipe, the rear end of the elastic rubber sleeve is sleeved on the annular boss and is fastened by a sleeve clamp, the front end of the gas conveying pipeline passes through the annular boss and is communicated with the air-filled interlayer, and the front end of the gas conveying pipeline is fixedly connected with the annular boss.

[0010] Further, the front end of the elastic air bag is provided with a vent connector, a support is fixedly arranged in the pressurizing cylinder, and the vent connector is fixedly connected with the support; and the rear end of the gas conveying pipeline is sealingly and fixedly connected with the vent connector.

[0011] Further, the main bodies of the grouting pipe, the pressurizing cylinder, the elastic air bag and the elastic rubber sleeve are all designed in a cylindrical shape, and the central axes are coincident.

[0012] Compared with the prior art, the self-expanding type grouting hole sealing device has the following beneficial technical effects:

[0013] When the self-expanding type grouting hole sealing device is used, the elastic rubber sleeve is indirectly driven to expand through the slurry pressure, good hole sealing effect is achieved, no manpower is needed to drive, no additional pressure equipment is needed to be configured, it is efficient and convenient, and the implementation cost is low. The self-expanding type grouting hole sealing device has compact structure, high flexibility and good applicability. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not a limitation on the present application.

[0015] Figure 1 It is an overall structural schematic view of the self-expanding type grouting hole sealing device in the embodiment.

[0016] Figure 2 It is an overall structural schematic view of the self-expanding type grouting hole sealing device in another direction in the embodiment.

[0017] Figure 3 It is a structural schematic view of the self-expanding type grouting hole sealing device after being partially cut open in the embodiment.

[0018] Figure 4 It is an initial state schematic view of the self-expanding type grouting hole sealing device in the embodiment.

[0019] Figure 5 A schematic diagram of the state of the self-expanding type hole sealing and grouting device in the embodiment when plugging the drill hole.

[0020] Reference signs:

[0021] 1-liquid outlet; 2-grouting pipe; 3-elastic rubber sleeve; 4-annular boss; 5-three-way valve; 6-one-way valve; 7-gas conveying pipeline; 8-liquid inlet joint; 9-pressurizing cylinder; 10-lifting handle; 11-on-off valve; 12-hoop; 13-inflatable interlayer; 14-ventilation joint; 15-bracket; 16-elastic air bag. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Referring to Figures 1 to 5 As shown in the drawings, the embodiments disclose a self-expanding type hole sealing and grouting device in the present application, which comprises a grouting pipe 2 and a pressurizing cylinder 9. The grouting pipe 2 is a hollow tubular structure, the front end of which is a liquid outlet 1, and the rear end of which is fixedly connected with the pressurizing cylinder 9 and communicates with the pressurizing cylinder 9. An on-off valve 11 for adjusting the on-off state of the grouting pipe 2 is arranged on the pipe body of the grouting pipe 2, and an elastic rubber sleeve 3 is fixedly arranged outside the grouting pipe 2. The elastic rubber sleeve 3 is located at the rear side of the liquid outlet 1, and the two ends of the elastic rubber sleeve 3 are fixedly and sealingly connected with the grouting pipe 2, so that a closed inflatable interlayer 13 is formed between the elastic rubber sleeve 3 and the grouting pipe 2. The rear end of the pressurizing cylinder 9 is provided with a liquid inlet joint 8 for connecting with a grouting pump, and an elastic air bag 16 is arranged inside the pressurizing cylinder 9. The elastic air bag 16 is made of high-elasticity material and is in an inflated state in a natural state. The elastic air bag 16 is connected with the inflatable interlayer 13 through a gas conveying pipeline 7. A one-way valve 6 is arranged on the gas conveying pipeline 7, which allows and only allows the air in the elastic air bag 16 to flow to the inflatable interlayer 13. The elastic air bag 16 and the inflatable interlayer 13 are respectively connected with two joints of a three-way valve 5, and the other joint of the three-way valve 5 communicates with the atmosphere. When the three-way valve 5 is in a closed state, the elastic air bag 16, the inflatable interlayer 13 and the atmosphere are not communicated with each other. When the three-way valve 5 is in an open state, the elastic air bag 16 and the inflatable interlayer 13 both communicate with the atmosphere.

[0024] As Figures 1 to 3As shown, in the initial state, the three-way valve 5 is in the open state, ensuring that the elastic air bag 16 and the elastic rubber sleeve 3 are in a natural relaxed state to ensure the elastic performance and prolong the durability; in this state, the elastic air bag 16 is in communication with the atmosphere, and the inner cavity is filled with air.

[0025] The operation mode and working principle of the self-expanding grouting hole sealing device in the process of grouting the drill hole are as follows:

[0026] First, as shown in Figure 3 , Figure 4 , connect the liquid inlet joint 8 of the pressure cylinder 9 with the grouting pump, adjust the three-way valve 5 and the on-off valve 11 to the closed state, and place the front end of the grouting pipe 2 into the drill hole and ensure that the elastic rubber sleeve 3 is located inside the hole.

[0027] Then, as shown in Figure 4 , Figure 5 , turn on the grouting pump to slowly input high-pressure slurry into the grouting pipe 2; since the on-off valve 11 is in the closed state, the slurry cannot be discharged through the liquid outlet 1 of the grouting pipe 2 at this time, and the high-pressure slurry in the pressure cylinder 9 will force the elastic air bag 16 to contract, the air in the elastic air bag 16 enters the air-filled layer 13 through the air supply pipeline 7, drives the elastic rubber sleeve 3 to expand and deform, and finally the elastic rubber sleeve 3 is in close contact with the inner wall of the drill hole, thereby sealing the hole of the drill hole; since the three-way valve 5 is in the closed state, and the air in the air-filled layer 13 cannot flow back to the elastic air bag 16 through the one-way valve 6, the elastic rubber sleeve 3 can maintain the expanded state to maintain the sealing effect of the drill hole.

[0028] Thereafter, in the state shown in Figure 5 , open the on-off valve 11 to make the grouting pipe 2 in the open state, and the grouting pump normally operates to continuously inject high-pressure slurry into the drill hole.

[0029] Finally, after the grouting is completed, the slurry pressure in the pressure cylinder 9 is released, and the three-way valve 5 is adjusted to the open state; at this time, the elastic air bag 16 and the elastic rubber sleeve 3 gradually recover to the initial state relying on their own elasticity, and the grouting pipe 2 and the elastic rubber sleeve 3 are taken out of the drill hole, that is, the entire operation is completed.

[0030] In specific embodiments:

[0031] The grouting pipe 2 and the pressure cylinder 9 are preferably made of metal material to ensure high structural strength and good anti-deformation ability, which can withstand high-pressure slurry pressure and adapt to the connection of the grouting pump;

[0032] The elastic rubber sleeve 3 is preferably made of rubber materials such as nitrile rubber, neoprene rubber and silicone rubber to realize high elasticity, medium corrosion resistance and good sealing performance, which can better adapt to the contact pressure of the inner wall of the drill hole;

[0033] The elastic airbag 16 is preferably made of high-elasticity silicone rubber, polyurethane composite material or carbon fiber reinforced rubber, etc., so as to have good self-expansion, fatigue resistance and high elastic modulus, and can better adapt to repeated inflation and deflation conditions.

[0034] like Figures 1 to 3 As shown, in a preferred embodiment, the switch valve 11 is installed between the pressure cylinder 9 and the elastic sleeve 3 to facilitate manual adjustment; similarly, the three-way valve 5 is also installed between the pressure cylinder 9 and the elastic sleeve 3.

[0035] like Figures 1 to 3 As shown, in a preferred embodiment, a handle 10 is installed on the grouting pipe 2 and the pressure cylinder 9. The handle 10 is located on the rear side of the elastic rubber sleeve 3. Based on the ergonomic structural design, the grouting and sealing device can be easily carried by hand, which is convenient and labor-saving.

[0036] like Figures 1 to 3 As shown, in a preferred embodiment, the grouting pipe 2 is provided with an annular boss 4, the rear end of the elastic sleeve 3 is fitted onto the annular boss 4 and fastened by the sleeve clamp 12, the front end of the air supply pipe 7 passes through the annular boss 4 and communicates with the air-filled interlayer 13, and the front end of the air supply pipe 7 is fixedly connected to the annular boss 4; thereby avoiding the deformation of the elastic sleeve 3 from affecting the connection stability of the air supply pipe 7 and the air-filled interlayer 13, and improving the connection stability of the air supply pipe 7 and the air-filled interlayer 13.

[0037] like Figures 1 to 3 As shown, in a preferred embodiment, the front end of the elastic airbag 16 is provided with a vent connector 14, and a bracket 15 is fixed inside the pressurizing cylinder 9. The vent connector 14 is fixedly connected to the bracket 15. The rear end of the air supply pipeline 7 is sealed and fixedly connected to the vent connector 14. Thus, with the cooperation of the bracket 15 and the vent connector 14, the elastic airbag 16 can be provided with good support, so that the position of the vent connector 14 will not change when the elastic airbag 16 undergoes elastic deformation. On the one hand, this avoids obstructing the rear end of the grouting pipe 2 and affecting the grouting effect, and on the other hand, it improves the connection stability between the rear end of the air supply pipeline 7 and the elastic airbag 16.

[0038] like Figures 1 to 3 As shown, in a preferred embodiment, the main bodies of the grouting pipe 2, the pressure cylinder 9, the elastic airbag 16, and the elastic sleeve 3 are all cylindrical in shape and their central axes coincide; thereby improving the structural stability and stress balance of the grouting and sealing device during operation.

Claims

1. A self-expanding type grouting hole sealing device, comprising a grouting pipe, the front end of the grouting pipe being a liquid outlet, characterized in that: The rear end of the grouting pipe is connected with a pressurizing cylinder, a switch valve is arranged on the grouting pipe, an elastic rubber sleeve is arranged outside the grouting pipe, a closed air-filled interlayer is formed between the elastic rubber sleeve and the grouting pipe, the rear end of the pressurizing cylinder is provided with a liquid inlet joint, an elastic air bag is arranged inside the pressurizing cylinder, the elastic air bag and the air-filled interlayer are connected through a gas conveying pipeline, a one-way valve allowing air inside the elastic air bag to flow into the air-filled interlayer only is arranged on the gas conveying pipeline, the elastic air bag and the air-filled interlayer are respectively connected with two joints of a three-way valve, and the other joint of the three-way valve is communicated with the atmosphere.

2. The self-inflating grouting hole sealing device according to claim 1, characterized in that: The installation position of the switch valve is between the pressurizing cylinder and the elastic rubber sleeve.

3. The self-inflating grouting hole sealing device according to claim 1, characterized in that: The installation position of the three-way valve is also between the pressurizing cylinder and the elastic rubber sleeve.

4. The self-inflating grouting hole sealing device according to claim 1, characterized in that: A handle is arranged on the grouting pipe and the pressurizing cylinder, and the handle is located at the rear side of the elastic rubber sleeve.

5. The self-inflating grouting hole sealing device according to claim 1, characterized in that: An annular boss is arranged on the grouting pipe, the rear end of the elastic rubber sleeve is sleeved on the annular boss and is fastened by a sleeve clamp, the front end of the gas conveying pipeline passes through the annular boss and is communicated with the air-filled interlayer, and the front end of the gas conveying pipeline is fixedly connected with the annular boss.

6. The self-inflating grouting hole sealing device according to claim 1, characterized in that: The front end of the elastic air bag is provided with a vent joint, a support is fixedly arranged inside the pressurizing cylinder, and the vent joint is fixedly connected with the support; and the rear end of the gas conveying pipeline is sealingly and fixedly connected with the vent joint.

7. The self-inflating grouting hole sealing device according to claim 1, characterized in that: The main bodies of the grouting pipe, the pressurizing cylinder, the elastic air bag and the elastic rubber sleeve are all designed in a cylindrical shape, and the central axes are coincident.

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