CN210033369U

CN210033369U - Slip casting plugging device

Info

Publication number: CN210033369U
Application number: CN201920817085.0U
Authority: CN
Inventors: 赵志林
Original assignee: Henan Zhi Lin Mining Equipment Technology Co Ltd
Current assignee: Henan Zhi Lin Mining Equipment Technology Co Ltd
Priority date: 2019-06-02
Filing date: 2019-06-02
Publication date: 2020-02-07
Anticipated expiration: 2029-06-02

Abstract

The utility model provides a slip casting plugging device, includes a slip casting passageway and two shutoff bags, and two shutoff bags are preceding shutoff bag, back shutoff bag, and the slip casting passageway communicates two shutoff bags in order, and the slip casting passageway all is equipped with the discharge gate in the part in two shutoff bags, has the distance between two shutoff bags, and the part that the slip casting passageway is located between two shutoff bags is equipped with the blast valve, and the bag wall of shutoff bag enables water to pass through and can not make the thick liquids pass through. Compared with the prior art, the technical effect of the utility model is that, the utility model discloses no longer be equipped with the check valve, the pressure that leans on the slip casting when the slip casting passes through the shutoff bag wall equally can the drainage, in the drainage, along with thick liquids constantly pour into, this part of water occupied space occupied by the thick liquids of follow-up entering, can not form the return air gap, has improved the shutoff effect.

Description

Slip casting plugging device

Technical Field

The utility model relates to a slip casting hole packer that uses when being applicable to hole is taken out to shutoff gas in pit.

Background

The existing plugging device, as shown in fig. 1, includes an air extraction pipeline (also called as a gas drainage pipeline) 10 and a grouting channel 30, which can extend into a gas drainage hole, two annular plugging bags (a front plugging bag 21 and a rear plugging bag 22) are fixed in the radial direction of the outer wall of the air extraction pipeline 10, the grouting channel 30 is sequentially communicated with the two plugging bags, a one-way valve 31 is arranged in the part of the grouting channel 30 inside the plugging bags, and the grouting channel 30 can inject plugging materials into the two plugging bags through the one-way valve 31 and cannot flow in the reverse direction. The purpose of arranging the one-way valve is that after the injected slurry is finished, the moisture in the plugging bag flows to the slurry injection channel 30 (back) through the one-way valve 31, so that the fixing speed of the slurry in the plugging bag is accelerated, the moisture is prevented from occupying the space, and the air return gap is prevented from being formed in the subsequent extraction operation to influence the efficiency of gas extraction.

During plugging operation, firstly, the air exhaust pipeline 10 extends upwards into the gas drainage hole, grouting is carried out on the two plugging bags from the grouting pipeline 30, a plug is formed by plugging the space between the outer wall of the air exhaust pipeline and the hole wall of the hole in the plugging bag, after the pressure of the two plugging bags reaches a certain degree, the grouting pipeline between the two plugging bags is broken (generally a blast valve 32) and grouting is carried out in the hole between the two plugging bags, when the pressure of the part reaches a certain degree (at this time, water in slurry is extruded out, but the slurry is only compacted and not in a solidified state), the grouting power of the grouting channel 30 is removed, the water in the plugging bags is discharged from the grouting pipeline 30 through gravity, and the solidification of the slurry is accelerated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves: in practice, there are two drawbacks to providing a one-way valve: firstly, the grouting channel 30 is blocked from flowing into the plugging bag, and the grouting speed is reduced; secondly, after the grouting power of the grouting channel is removed, water in the plugging bag is discharged from the grouting pipeline 30, and after the water is discharged, the space occupied by the water once can form an air return gap, so that the gas pumping efficiency is influenced.

The technical scheme of the utility model specifically does:

the utility model provides a slip casting plugging device, includes a slip casting passageway and two shutoff bags, and two shutoff bags are preceding shutoff bag, back shutoff bag, and the slip casting passageway communicates two shutoff bags in order, and the slip casting passageway all is equipped with the discharge gate in the part in two shutoff bags, has the distance between two shutoff bags, and the part that the slip casting passageway is located between two shutoff bags is equipped with the blast valve, and the bag wall of shutoff bag enables water to pass through and can not make the thick liquids pass through.

It still includes the bleed-off line, two shutoff bags are fixed to the radial direction of bleed-off line outer wall: a front plugging bag and a rear plugging bag.

And a drainage pipeline is arranged between the front plugging bag and the rear plugging bag, extends backwards to pass through the rear plugging bag and then is communicated with the outside, the outside of the drainage pipeline is wrapped with filter cloth, a plurality of through holes are distributed on the pipe wall of the drainage pipeline, and meshes of the filter cloth can enable water to pass but not enable slurry to pass.

The size of the discharge hole of the front plugging bag is larger than that of the discharge hole of the rear plugging bag.

Compared with the prior art, the technical effect of the utility model is that, the utility model discloses no longer be equipped with the check valve, the pressure that leans on the slip casting when the slip casting passes through the shutoff bag wall equally can the drainage, in the drainage, along with thick liquids constantly pour into, this part of water occupied space occupied by the thick liquids of follow-up entering, can not form the return air gap, has improved the shutoff effect.

Drawings

Fig. 1 is a schematic diagram of the prior art.

Fig. 2 is a schematic diagram (a) of the present invention.

FIG. 3 is an enlarged view of a section of the drainpipe and the filter cloth of FIG. 2 shown in expanded state.

Fig. 4 is a reference diagram of the usage status of the present invention.

Fig. 5 is a schematic diagram (ii) of the present invention.

Detailed Description

In the present specification, the left side of the drawings is front and the right side is back, and the front and the back are only for convenience of description and do not represent other meanings.

Like fig. 2, a slip casting plugging device, including bleed-off line 10, slip casting passageway 30, in bleed-off line 10 can stretch into the gas drainage hole, two annular shutoff bags are fixed to the radial direction of bleed-off line 10 outer wall: the front plugging bag 21 and the rear plugging bag 22 are arranged in sequence, the grouting channel 30 is communicated with the two plugging bags, the parts of the grouting channel 30 in the two plugging bags are provided with discharge holes 33, a distance is reserved between the two plugging bags, the part of the grouting channel 30 between the two plugging bags is provided with a blast valve 32, and the bag walls of the plugging bags can allow water to pass but cannot allow slurry to pass.

As shown in fig. 2-3, a drainage pipeline 40 is arranged between the front plugging bag 21 and the rear plugging bag 22, the drainage pipeline 40 extends backwards to pass through the rear plugging bag 22 and then is communicated with the outside, the outside of the drainage pipeline is wrapped by a filter cloth 42, a plurality of through holes 41 are distributed on the wall of the drainage pipeline, and the meshes of the filter cloth 42 can allow water to pass but not slurry to pass. The drainage pipeline 40 is arranged for draining water in the material between the front plugging bag 21 and the rear plugging bag 22.

When the gas drainage hole is inclined upwards, the front plugging bag 21 needs to overcome more gravity to do work and the speed is slowed down, so that the feeding speed of the two rear plugging bags is high, the rear plugging bag 22 is expanded too early, the radial direction of the grouting channel 30 is extruded and flattened by the expansion, the cross section area is reduced, and the conveying capacity is reduced, therefore, the size of the discharge hole 33 of the front plugging bag 21 is larger than that of the discharge hole 33 of the rear plugging bag 22.

The working principle is as follows:

when in use, the plugging method comprises the following steps:

as shown in fig. 4, in a first step, the left side of the air extraction duct 10 is extended into the gas extraction hole 50 until two annular blocking bags are located at the blocking positions of the gas extraction hole 50.

In the second step, the two plugging bags are filled with slurry through the slurry filling passage 30, the pressure in the plugging bags gradually increases, and at the same time, the plugging bags start to expand outward until they contact the wall of the gas drainage hole 50, the expansion of which is partially referred to by

reference numerals

221 and 222, and at the same time, the water in the plugging bags flows to the outside through the walls thereof.

Thirdly, when the pressure of the grouting channel 30 at the position of the blasting valve 32 is larger than the critical value, the blasting valve 32 is broken, at this time, two plugging bags form two plugs, the slurry in the grouting channel 30 enters the last grouting space 321 between the two plugs of the gas drainage hole through the broken position, the pressure of the last grouting space 321 is larger and larger as the grouting quantity is larger, and the water in the last grouting space 321 is extruded to the through hole 41 and the drainage pipeline 40 to be discharged;

and fourthly, continuously keeping the grouting pressure of the grouting channel 30, continuously supplementing slurry to the space occupied by the external drainage till the slurry in the two plugging bags and the grouting space 321 is solidified, and removing the grouting pressure to finish plugging.

In addition, sometimes, the plugging does not need to exhaust (gas extraction) the pipeline, such as plugging of a detection hole, if toxic gas such as gas is not found through the detection of the detection hole, only the detection hole needs to be sealed, and gas extraction is not needed, and in this case, the following hole packer can be used:

as shown in fig. 5, a grouting plugging device comprises a grouting channel 30 and two plugging bags: the front plugging bag 21 and the rear plugging bag 22 are arranged in sequence, the grouting channel 30 is communicated with the two plugging bags, the parts of the grouting channel 30 in the two plugging bags are provided with discharge holes 33, a distance is reserved between the two plugging bags, the part of the grouting channel 30 between the two plugging bags is provided with a blast valve 32, and the bag walls of the plugging bags can allow water to pass but cannot allow slurry to pass.

When the hole packer is used, two plugging bags are placed in a detection hole in tandem, the two plugging bags can also become two sealing rings through the injection of materials into the two plugging bags, and the space between the two plugging bags can also be injected with slurry to realize sealing.

Compared with the prior art, the plugging device does not use a one-way valve, and the technical effect is the same.

Other content participates in the prior art.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims

1. The utility model provides a slip casting plugging device, includes a slip casting passageway (30) and two shutoff bags, and two shutoff bags are preceding shutoff bag (21), back shutoff bag (22), and slip casting passageway (30) communicates two shutoff bags, its characterized in that in order: the parts of the grouting channel (30) in the two plugging bags are provided with discharge holes (33), a distance is reserved between the two plugging bags, the part of the grouting channel (30) between the two plugging bags is provided with a blast valve (32), and the bag walls of the plugging bags can allow water to pass but not slurry to pass.

2. The grouting plugging device of claim 1, wherein: it still includes air exhaust pipeline (10), two shutoff bags are fixed to the radial direction of air exhaust pipeline (10) outer wall: a front plugging bag (21) and a rear plugging bag (22).

3. The grouting plugging device of claim 2, wherein: a drainage pipeline (40) is arranged between the front plugging bag (21) and the rear plugging bag (22), the drainage pipeline (40) extends backwards to pass through the rear plugging bag (22) and then is communicated with the outside, the outside of the drainage pipeline is wrapped with a filter cloth (42), a plurality of through holes (41) are distributed on the wall of the drainage pipeline, and meshes of the filter cloth (42) can allow water to pass but not slurry to pass.

4. The grouting plugging device of claim 2, wherein: the size of the discharge hole (33) of the front plugging bag (21) is larger than that of the discharge hole (33) of the rear plugging bag (22).