Grouting device for coal mine tunnel support

Abstract

A grouting device for coal mine tunnel supporting comprises a bottom plate, a slurry barrel, a slurry pump and a grouting barrel are arranged at the top of the bottom plate, a grouting head is fixedly connected to the top of the grouting barrel, a feeding pipe is fixed to the inlet end of the slurry pump and communicated with the slurry barrel, a discharging pipe is fixed to the outlet end of the slurry pump and communicated with the grouting barrel, and the grouting head is fixedly connected with the slurry barrel. A sealing device is installed on the grouting head and comprises an inner sliding sleeve fixed to the lower portion of the grouting head, an outer sliding sleeve is connected outside the inner sliding sleeve in a sliding mode, a lower supporting ring is detachably installed on the outer side of the outer sliding sleeve, an upper supporting ring is arranged above the lower supporting ring, and a spring is fixed between the upper supporting ring and the lower supporting ring. A first sealing gasket is mounted at the top of the upper supporting ring; a limiting sleeve is fixed to the bottom of the inner sliding sleeve, the outer side of the limiting sleeve is sleeved with a jacking sleeve, and the jacking sleeve is in threaded connection with the limiting sleeve. A second sealing gasket is fixed to the top of the inner sliding sleeve. According to the utility model, slurry in the hole can be effectively prevented from flowing back.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine tunnel support, in particular to a grouting device for coal mine tunnel support. Background Art

[0002] In the coal mine tunnel support project, anchor grouting can fill the tunnel holes and cracks, cement and reinforce the broken rock blocks into a whole, fully improve the self-bearing capacity of the surrounding rock, and improve the support effect. However, the existing grouting device will produce backflow when grouting the tunnel holes and cracks. In addition, the slurry in the grouting device will produce stratified precipitation or even solidification after being placed for a period of time. The patent publication number is CN218150966U, and the patent name is a patent disclosure of a grouting device for coal mine tunnel support. In the technical scheme disclosed in the patent, the top of the mud barrel is fixedly connected to a stirring motor, the output end of the mud barrel is fixedly connected to a first spiral conveying rod, and the side of the first spiral conveying rod is fixedly connected to four stirring rods for fully stirring the mud in the mud barrel; an air bag is provided on the side of the grouting head, the bottom of the air bag is fixedly connected to one end of the air pipe, and the other end of the air pipe is fixedly connected to an air pump, and the air bag expands to block the hole mouth to prevent the mud in the hole from flowing back and causing unnecessary waste. However, when the inner wall of the tunnel hole is not smooth, the broken rocks can easily puncture the air bag, which cannot effectively prevent the mud in the hole from flowing back. Utility Model Content

[0003] The utility model aims to provide a grouting device for supporting coal mine tunnels, which can effectively prevent the mud in the hole from flowing back and has strong adaptability.

[0004] The technical solution adopted by the utility model is:

[0005] A grouting device for supporting a coal mine tunnel comprises a bottom plate, a wheel is installed at the bottom of the bottom plate, a mud bucket, a mud pump and a grouting barrel are arranged at the top of the bottom plate, a conveying device is installed on the grouting barrel, a grouting head is fixedly connected to the top of the grouting barrel, a feed pipe is fixed at the inlet end of the mud pump, the feed pipe is communicated with the mud bucket, a discharge pipe is fixed at the outlet end of the mud pump, the discharge pipe is communicated with the grouting barrel, a sealing device is installed on the grouting head, the sealing device comprises an inner sliding sleeve fixed at the lower part of the grouting head, and the inner sliding sleeve is slidably connected to the outer An outer sliding sleeve, the outer side of the outer sliding sleeve is detachably mounted with a lower support ring, an upper support ring is arranged above the lower support ring, a number of springs are fixed between the upper support ring and the lower support ring, and a first elastic sealing gasket is detachably mounted on the top of the upper support ring; a limiting sleeve is fixed at the bottom of the inner sliding sleeve, the outer side of the limiting sleeve is provided with a tightening sleeve for tightening against the bottom of the lower support ring, and the tightening sleeve is threadedly connected to the limiting sleeve; a second sealing gasket is fixed at the top of the inner sliding sleeve, and the outer end of the second sealing gasket extends to the top of the outer sliding sleeve.

[0006] The lower support ring includes a first lower support part and a second lower support part spliced ​​together, the inner sides of the first lower support part and the second lower support part are fixed with a first plug-in column, and the outer wall of the outer sliding sleeve is provided with a first plug-in hole corresponding to the first plug-in column; the upper support ring includes a first upper support part and a second upper support part, and springs are fixed between the first upper support part and the first lower support part and between the second upper support part and the second lower support part.

[0007] The first upper supporting part and the second upper supporting part are both fixed with second plugging posts, and the bottom of the first sealing gasket is provided with second plugging holes corresponding to the second plugging posts one by one.

[0008] Limiting blocks are fixed on the inner sides of the first upper supporting part and the second upper supporting part, and vertical limiting grooves are arranged on the outer side of the outer sliding sleeve. The limiting blocks are slidably connected in the corresponding limiting grooves.

[0009] A handle is fixed on the outer side of the tightening sleeve.

[0010] A stirring device is installed on the side of the mud barrel, and the stirring device includes a stirring motor fixed on the outside of the mud barrel, and a stirring shaft is arranged in the mud barrel, one end of the stirring shaft is fixedly connected to the output shaft of the stirring motor, and the other end of the stirring shaft and the output shaft of the stirring motor are rotatably connected to the side wall of the mud barrel, and a stirring blade is fixed on the stirring shaft; a first top cover is detachably fixed on the top of the mud barrel, a hopper is fixed on the first top cover, and a sealing cover is detachably installed on the hopper; a support leg is fixed on the bottom of the mud barrel, and the support leg is detachably fixed on the bottom plate, and a mud pump is arranged below the mud barrel, and the mud pump is detachably fixed on the bottom plate.

[0011] A support seat is fixed at the bottom of the grouting cylinder, and a lifting device is fixed at the bottom of the support seat. The lifting device includes a vertical sleeve fixed in the base plate, a sliding rod is slidably connected in the vertical sleeve, the top of the sliding rod is fixed to the bottom of the support seat, and a locking bolt is threadedly connected to the side of the vertical sleeve, and the inner end of the locking bolt is tightened on the sliding rod.

[0012] A placement box is fixed between the mud bucket and the grouting barrel, a second top cover is fixed on the top of the placement box, through holes are provided on both sides of the placement box, protective sleeves are fixed in the through holes, and the discharge pipe passes through the protective sleeves on the sides of the placement box in sequence.

[0013] In the utility model, wheels are installed at the bottom of the bottom plate to facilitate moving the grouting device to the destination. A mud bucket, a mud pump and a grouting barrel are arranged on the top of the bottom plate. The mud bucket is connected with the mud pump through a feed pipe, and the grouting barrel is connected with the mud pump through a discharge pipe. A conveying device is installed on the grouting barrel to facilitate conveying the mud to the grouting head. A sealing device is installed on the grouting head to seal the outer end of the tunnel hole. The sealing device includes an inner sliding sleeve fixed to the lower part of the grouting head, an outer sliding sleeve is slidably connected to the outer side of the inner sliding sleeve, and a lower support ring is detachably installed on the outer side of the outer sliding sleeve to facilitate installation and disassembly The lower support ring can slide up and down along the inner sliding sleeve with the outer sliding sleeve. An upper support ring is provided above the lower support ring. Several springs are fixed between the upper support ring and the lower support ring, so that the first sealing gasket on the upper support ring is pressed tightly against the bottom of the tunnel hole and around the bottom of the hole. A limiting sleeve is fixed at the bottom of the inner sliding sleeve to play a limiting role. A tightening sleeve is provided on the outer sleeve of the limiting sleeve for tightening against the bottom of the lower support ring. The tightening sleeve is threadedly connected to the limiting sleeve. A second sealing gasket is fixed on the top of the inner sliding sleeve, and the outer end of the second sealing gasket extends to the top of the outer sliding sleeve, so as to seal the tunnel hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the local structure of the grouting head;

[0016] Figure 3 This is a schematic diagram of the structure of the placement box. DETAILED DESCRIPTION

[0017] like Figure 1-Figure 3As shown, a grouting device for supporting coal mine tunnels comprises a base plate 1, and wheels 2 are installed at the bottom of the base plate 1 to facilitate moving the grouting device to the destination. A mud bucket 13, a mud pump 9 and a grouting barrel 18 are arranged on the top of the base plate 1. A conveying device is installed on the grouting barrel 18. The conveying device can adopt the patent publication number CN218150966U, and the patent name is a grouting device for supporting coal mine tunnels. The inner bottom of the grouting barrel 18 is fixedly connected to a conveying motor, and the output end of the conveying motor is fixedly connected to a second spiral conveying rod and other structures. This is the prior art and will not be repeated here. A grouting head 20 is fixedly connected to the top of the grouting barrel 18, a feed pipe 10 is fixed to the inlet end of the mud pump 9, and the feed pipe 10 is connected to the mud bucket 13, and a discharge pipe 8 is fixed to the outlet end of the mud pump 9, and the discharge pipe 8 is connected to the grouting barrel 18. A sealing device 19 is installed on the grouting head 20 for grouting the tunnel hole. The outer end of the hole is sealed, and the sealing device 19 includes an inner sliding sleeve 36 fixed to the lower part of the grouting head 20, and the outer sliding sleeve 35 is slidably connected to the inner sliding sleeve 36. The outer side of the outer sliding sleeve 35 is detachably mounted with a lower support ring for easy installation and disassembly. An upper support ring is arranged above the lower support ring, and a plurality of springs 25 are fixed between the upper support ring and the lower support ring. The top of the upper support ring is detachably mounted with a first elastic sealing gasket 27 for tightening against the bottom of the tunnel hole and around the bottom of the hole; a limiting sleeve 21 is fixed to the bottom of the inner sliding sleeve 36 for limiting, and a tightening sleeve 22 for tightening against the bottom of the lower support ring is arranged on the outer side of the limiting sleeve 21, and the tightening sleeve 22 is threadedly connected to the limiting sleeve 21 for easy up and down movement of the tightening sleeve 22; a second sealing gasket 31 is fixed to the top of the inner sliding sleeve 36, and the outer end of the second sealing gasket 31 extends to the top of the outer sliding sleeve 35 for sealing the tunnel hole.

[0018] The lower support ring includes a first lower support portion 24 and a second lower support portion 34 spliced ​​together, which is convenient for installing the lower support ring on the outside of the outer sliding sleeve 35. The first plug-in column 33 is fixed on the inner side of the first lower support portion 24 and the second lower support portion 34. A first plug-in hole corresponding to the first plug-in column 33 is provided on the outer wall of the outer sliding sleeve 35. The first plug-in column 33 is inserted into the corresponding first plug-in hole to realize the connection between the lower support ring and the outer sliding sleeve 35, which is convenient for installation and disassembly; the upper support ring includes a first upper support portion 26 and a second upper support portion 32. A spring 25 is fixed between the first upper support portion 26 and the first lower support portion 24 and between the second upper support portion 32 and the second lower support portion 34.

[0019] The second plug-in posts 28 are fixed to both the first upper support portion 26 and the second upper support portion 32 . The bottom of the first sealing gasket 27 is provided with second plug-in holes corresponding to the second plug-in posts 28 , so as to facilitate installation and removal of the first sealing gasket 27 .

[0020] A limiting block 29 is fixed on the inner side of the first upper support portion 26 and the second upper support portion 32, and a vertical limiting groove 30 is provided on the outer side of the outer sliding sleeve 35. The limiting block 29 is slidably connected in the corresponding limiting groove 30. When the first plug-in hole corresponding to the first plug-in column 33 on the inner side of the first lower support portion 24 and the second lower support portion 34 is connected, the limiting block 29 is inserted into the corresponding limiting groove 30. In the process of the upper support ring being squeezed and moving up and down, the limiting block 29 slides up and down along the limiting groove 30 to play a limiting role.

[0021] A handle 23 is fixed to the outer side of the tightening sleeve 22 , and the tightening sleeve 22 can be rotated conveniently by holding the handle 23 .

[0022] A stirring device 12 is installed on the side of the mud barrel 13 for stirring the mud in the mud barrel 13. The stirring device 12 includes a stirring motor fixed on the outside of the mud barrel 13. A stirring shaft is arranged in the mud barrel 13. One end of the stirring shaft is fixedly connected to the output shaft of the stirring motor. The other end of the stirring shaft and the output shaft of the stirring motor are both rotatably connected to the side wall of the mud barrel 13. A stirring blade is fixed on the stirring shaft. The stirring motor is used to drive the stirring shaft to rotate. The stirring blade is used to stir the mud. A first top cover 14 is detachably fixed on the top of the mud barrel 13 for easy installation and disassembly. A hopper 15 is fixed on the top cover 14, which is convenient for adding mud into the mud barrel 13. A sealing cover 16 is detachably installed on the hopper 15 to play a sealing role. When mud needs to be added to the mud barrel 13, the sealing cover 16 is opened, and when mud does not need to be added to the mud barrel 13, the sealing cover 16 is covered again; a supporting leg 11 is fixed to the bottom of the mud barrel 13, and the supporting leg 11 is detachably fixed on the bottom plate 1 for easy installation and disassembly. The mud pump 9 is arranged below the mud barrel 13 to facilitate the smooth discharge of the mud in the mud barrel 13. The mud pump 9 is detachably fixed on the bottom plate 1.

[0023] A support seat 6 is fixed at the bottom of the grouting barrel 18, and a lifting device is fixed at the bottom of the support seat 6 for adjusting the height of the grouting barrel 18, which has stronger adaptability. The lifting device includes a vertical sleeve 3 fixed in the base plate 1, and a sliding rod 5 is slidably connected in the vertical sleeve 3. The top of the sliding rod 5 is fixed to the bottom of the support seat 6, and a locking bolt 4 is threadedly connected to the side of the vertical sleeve 3. The inner end of the locking bolt 4 is tightened on the sliding rod 5. When the height of the grouting barrel 18 needs to be adjusted, the locking bolt 4 is loosened, and the position of the sliding rod 5 is adjusted up and down to adjust the grouting head 20 to a suitable height, and then the locking bolt 4 is tightened.

[0024] A placement box 7 is fixed between the mud barrel 13 and the grouting tube 18. A second top cover 17 is fixed on the top of the placement box 7 for easy installation and disassembly. Through holes are provided on both sides of the placement box 7. Protective sleeves 37 are fixed in the through holes for protection. The discharge pipe 8 passes through the protective sleeves 37 on the sides of the placement box 7 in sequence. The length of the discharge pipe 8 is appropriately longer and is arranged in the placement box 7 for storage.

[0025] The utility model can effectively prevent the mud in the hole from flowing back, and has strong adaptability. When in use, the grouting device is pushed to the destination. According to the needs, the height of the grouting head 20 is adjusted by adjusting the position of the slide bar 5 of the lifting device. The grouting head 20 is inserted into the tunnel hole, and the outer sliding sleeve 35 is slid upward to make the first sealing gasket 27 contact with the bottom of the tunnel hole. Then the handle 23 is held to rotate the tightening sleeve 22 so that the tightening sleeve 22 is pressed against the bottom of the lower support ring. The spring 25 is in a compressed state, and the first sealing gasket 27 is pressed against the bottom of the tunnel hole to play a better sealing role. The mud pump 9 pumps out the mud in the mud barrel 13 through the feed pipe 10, and pumps it into the grouting tube 18 through the discharge pipe 8. The grouting tube 18 is equipped with a conveying device to convey the mud in the grouting tube 18 to the grouting head 20 and inject it into the tunnel hole.

[0026] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A grouting device for supporting coal mine tunnels, comprising a base plate, a wheel is installed at the bottom of the base plate, a mud bucket, a mud pump and a grouting tube are arranged on the top of the base plate, a conveying device is installed on the grouting tube, a grouting head is fixedly connected to the top of the grouting tube, a feed pipe is fixed at the inlet end of the mud pump, the feed pipe is connected to the mud bucket, a discharge pipe is fixed at the outlet end of the mud pump, the discharge pipe is connected to the grouting tube, and the characteristics are: A sealing device is installed on the grouting head, and the sealing device includes an inner sliding sleeve fixed at the lower part of the grouting head, an outer sliding sleeve is slidably connected to the outer side of the inner sliding sleeve, a lower support ring is detachably installed on the outer side of the outer sliding sleeve, an upper support ring is provided above the lower support ring, a plurality of springs are fixed between the upper support ring and the lower support ring, and a first elastic sealing gasket is detachably installed on the top of the upper support ring; a limiting sleeve is fixed to the bottom of the inner sliding sleeve, and the outer sleeve of the limiting sleeve is provided with a tightening sleeve for tightening against the bottom of the lower support ring, and the tightening sleeve is threadedly connected to the limiting sleeve; a second sealing gasket is fixed to the top of the inner sliding sleeve, and the outer end of the second sealing gasket extends to the top of the outer sliding sleeve.

2. The grouting device for coal mine tunnel support according to claim 1, characterized in that: The lower support ring includes a first lower support part and a second lower support part spliced ​​together, the inner sides of the first lower support part and the second lower support part are fixed with a first plug-in column, and the outer wall of the outer sliding sleeve is provided with a first plug-in hole corresponding to the first plug-in column; the upper support ring includes a first upper support part and a second upper support part, and springs are fixed between the first upper support part and the first lower support part and between the second upper support part and the second lower support part.

3. The grouting device for coal mine tunnel support according to claim 2, characterized in that: The first upper supporting part and the second upper supporting part are both fixed with second plugging posts, and the bottom of the first sealing gasket is provided with second plugging holes corresponding to the second plugging posts one by one.

4. The grouting device for coal mine tunnel support according to claim 3, characterized in that: Limiting blocks are fixed on the inner sides of the first upper supporting part and the second upper supporting part, and vertical limiting grooves are arranged on the outer side of the outer sliding sleeve. The limiting blocks are slidably connected in the corresponding limiting grooves.

5. The grouting device for coal mine tunnel support according to claim 1, characterized in that: A handle is fixed on the outer side of the tightening sleeve.

6. The grouting device for coal mine tunnel support according to claim 1, characterized in that: A stirring device is installed on the side of the mud barrel, and the stirring device includes a stirring motor fixed on the outside of the mud barrel, and a stirring shaft is arranged in the mud barrel, one end of the stirring shaft is fixedly connected to the output shaft of the stirring motor, and the other end of the stirring shaft and the output shaft of the stirring motor are rotatably connected to the side wall of the mud barrel, and a stirring blade is fixed on the stirring shaft; a first top cover is detachably fixed on the top of the mud barrel, a hopper is fixed on the first top cover, and a sealing cover is detachably installed on the hopper; a support leg is fixed on the bottom of the mud barrel, and the support leg is detachably fixed on the bottom plate, and a mud pump is arranged below the mud barrel, and the mud pump is detachably fixed on the bottom plate.

7. The grouting device for coal mine tunnel support according to claim 1, characterized in that: A support seat is fixed at the bottom of the grouting cylinder, and a lifting device is fixed at the bottom of the support seat. The lifting device includes a vertical sleeve fixed in the base plate, a sliding rod is slidably connected in the vertical sleeve, the top of the sliding rod is fixed to the bottom of the support seat, and a locking bolt is threadedly connected to the side of the vertical sleeve, and the inner end of the locking bolt is tightened on the sliding rod.

8. The grouting device for coal mine tunnel support according to claim 7, characterized in that: A placement box is fixed between the mud bucket and the grouting barrel, a second top cover is fixed on the top of the placement box, through holes are provided on both sides of the placement box, protective sleeves are fixed in the through holes, and the discharge pipe passes through the protective sleeves on the sides of the placement box in sequence.

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