Grouting plug

Grouting plug

EMPIRE grouting plug is an advanced multi-purpose deep-hole grouting and packing device, and is developed on basis of numerous tests and grouting practices in later 1990s both at home and abroad.

 

I. Use

The grouting plug is widely used in hydrofracture, grouting and gas drainage at coal and iron mines.

 

II. Performance Indicators

Packing diameter: 30mm~120mm (As per customer needs)
Working pressure: 1MPa~8MPa (As per customer needs)
Safety valve actuation pressure: 0.4MPa~0.5MPa
Working flow rate: 4~4.5t/h
Packing depth:1m~8m

 

III. Technical Specification

Model

O.D.

(mm)

Expansion in free state (mm)

Applicable Aperture

(mm)

Working pressure in free state (MPa)

Pressure capacity in working state (MPa)

Test Pressure

Burst Pressure

φ32-2

50±2.0

90

+8

60

6

12

24

-4

φ38-2

55±2.0

95

+8

65

5

10

20

-4

φ45-2

63±2.0

100

+8

75

4

8

16

-4

φ45-4

69±2.0

100

+8

75

16

24

32

-4

φ51-2

69±2.0

110

+8

90

4

8

16

-4

φ51-4

75±2.0

110

+8

90

16

24

32

-4

φ64-2

84±2.0

120

+8

100

3

6

12

-4

φ64-4

90±2.0

120

+8

100

8

12

16

-4

φ76-2

94±2.0

130

+8

110

3

6

12

-4

φ76-4

99±2.0

130

+8

110

8

12

16

-5

φ89-2

109±2.0

140

+8

130

3

6

12

-5

φ102-2

122±2.0

160

+8

150

3

6

12

-5

 

IV. Instructions and Precautions

1. Connect all pipeline systems, fasten all screws and connections, and connect the air source (or water pump). Then, insert the grouting plug at the hole opening (or in steel pipe with the other end sealed), to connectors tested for leakage. After that, put the grouting plug into the hole for future use.

2. Open the air cylinder release valve or water pump to let the expansion plug expand slowly. Mind that the inflation pressure must be greater than 2/3 of the grout injection pressure, and the grout injection may be started when the preset pressure is realized.

3. After the grout injection operation is started, when large amount of grout overflows from the return outlet, increase the pressure slowly to the preset grout injection pressure, otherwise, large pressure difference may be produced. Check readings on pressure meter on air cylinder from time to time, and supplement air supply if pressure is low.

4. Since the grout injection takes a long period, attentions should be paid to channeling, blockage and backflow phenomena, if such phenomena occur, the grout injection operation should be stopped and the pressure should be released. Then loosen the inflation plug to protect the plug from being blocked and stuck.

5. After grout injection operation, release the grout injection pressure and then release the inflation pressure, to prevent grout ejecting at high speed and causing accidents.

6. After the grout injection operation is completed, put the grout injection plug into a steel pipe with the other end sealed, and then inflate the plug to about 0.5 MPa and clean the plug by repeating the process.

7. After the grout injection plug is removed, connect the water pipe with the grout inlet and return pipes to clean them.

8. When grout injection is carried out simultaneously at several holes, all pipes should be arranged in rows and should not be twisted with one another, in order to prevent accidents and impact to operation at other holes.

9. After the plug is being in use for a long period, the plug should be disassembled from the lower end to clean and to apply grease.

10. In drilling operation, if long cracks or breakage is found, channeling, blockage and backflow may occur, in which case, another hose should be placed on the grouting plug and high pressure may be applied to prevent blockage.

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