CN205349295U - Gas drainage under suction hole packer - Google Patents

Abstract

The utility model discloses a gas pumping and sealing device, which belongs to the technical field of mine gas prevention and control. The utility model comprises a first extraction pipe, a second extraction pipe, a rubber pipe, a spiral blade, an air intake pipe and a grouting pipe. The inner wall of the spiral blade is also provided with internal threads, and the first extraction pipe below the spiral blade A detachable annular elastic gasket is provided, and the outer wall of the rear end of the second extraction pipe is provided with an external thread engaged with an internal thread on the inner wall of the helical blade. The utility model quickly seals the borehole through the grouting liquid and the spiral blade between the rubber tube, the spiral blade and the rubber tube, and can also overcome the problems of the hole sealer not being tightly sealed or the air leakage failure after the deformation of the coal body. To avoid the heavy workload of secondary sealing and increase the construction cost, and some parts can be used multiple times, saving cost. The hole sealing device has simple structure, ingenious design, low production cost, good sealing effect, strong applicability, safety and reliability. Significant economic and social benefits.

Description

A gas extraction and sealing device

technical field

The utility model relates to the technical field of mine gas prevention and control, in particular to a gas drainage and sealing device.

Background technique

With the rapid development of the coal industry and the mechanization of coal mine production, the gas and dust problems in coal mine production have become more and more prominent, and gas and coal dust explosions have occurred from time to time, especially in recent years with the increase of mine mining depth, coal seam gas The pressure and gas content are gradually increasing. In order to ensure the safety of the mine, the mining and excavation face of the mine generally adopts a new technology of drilling and pre-extracting gas, which brings about the problem of plugging and sealing between the drainage hole and the drainage pipeline.

The traditional and simple method is to directly seal the hole with cement mortar, insert the gas drainage pipe into the bottom of the hole sealing section of the drilled hole and block it with wooden wedges or cotton yarn, then seal the hole with cement, and pump the gas after the cement mortar solidifies. It takes a long time to seal the hole with cement mortar and inject water, the sealing effect is not good, the ability to withstand air pressure is not strong, and it consumes a lot of materials and is inconvenient to operate. Moreover, cement mortar plugging is used in medium-hard and hard coal seams, but the plugging effect on soft coal seams is poor. In addition, in the construction of underground hole sealing in coal mines, it often happens that the initial sealing effect is not good or the coal body deforms as the mining degree intensifies, so that the originally isolated cracks communicate with the outside world, resulting in air leakage, resulting in the failure of sealing holes, and At this time, if the secondary hole expansion and hole sealing operations are used to ensure the hole sealing effect, the workload will be increased and the economic benefits will be reduced.

Utility model content

1. The technical problems to be solved by the utility model

The purpose of this utility model is to overcome the deficiencies in the prior art and provide a gas pumping and sealing device. The utility model adopts the technical solution of the utility model through the grouting liquid and the screw blade between the rubber tube, the spiral blade and the rubber tube. Quickly sealing the drilled holes can also overcome the problem of poor sealing of the hole sealer or air leakage failure after the deformation of the coal body, avoiding the heavy workload of secondary sealing and increasing the construction cost, and some parts can be used multiple times. Cost saving, the hole sealer has simple structure, ingenious design, low production cost, good hole sealing effect, convenient operation, strong applicability, safety and reliability, and remarkable economic and social benefits.

2. Technical solution

In order to achieve the above object, the technical solution provided by the utility model is:

A gas pumping and sealing device of the present utility model comprises a first pumping pipe, a second pumping pipe, a rubber pipe, a spiral blade, an air inlet pipe and a grouting pipe, and the spiral blade is sleeved on the second pumping pipe. On the release pipe, the pitch of the helical blades, the helix angle of the blades, and the height of the helical blades keep changing in equal proportions. The inner wall of the helical blades is also provided with internal threads. On the first discharge pipe below the helical blades A detachable annular elastic gasket is provided, and the outer wall of the rear end of the second extraction pipe is provided with an external thread that engages with the internal thread on the inner wall of the spiral blade, and the second extraction pipe and the first extraction pipe are threaded connected, the rubber tube is fixed on the first exhaust pipe through a clamp, the air intake tube is embedded in the groove on the surface of the second exhaust tube and communicates with the rubber tube, and the first pressure tube is provided on the intake tube. The end of the air inlet pipe is connected with an air source, and the outlet of the grouting pipe is arranged in the gap between the spiral blade and the rubber pipe.

As a further improvement of the utility model, the rear end of the second extraction pipe is also provided with an observation window.

As a further improvement of the utility model, the spiral blade is a conical structure.

As a further improvement of the utility model, the front end of the first extraction pipe is provided with a guide head, an air extraction hole and a filter in sequence.

As a further improvement of the utility model, a valve and a second pressure gauge are arranged at the rear end of the second extraction pipe.

As a further improvement of the utility model, the air source is an air pump.

3. Beneficial effects

Compared with the prior art, the technical solution provided by the utility model has the following remarkable effects:

(1) A gas pumping and sealing device of the present utility model seals the drilled holes at the same time through the grouting fluid between the rubber tube, the spiral blade and the rubber tube and the screw blade, so as to overcome the lax sealing of the hole sealing device Or the problem of air leakage and failure after coal deformation, it can also avoid the heavy workload of secondary sealing and increase the construction cost.

(2) In a gas pumping and sealing device of the present utility model, the rubber tube can quickly adapt to the inner wall pressure of the borehole, the gas pressure in the rubber tube, and the grout pressure during grouting between the helical blade and the rubber tube, and can effectively solve the problem of drilling holes. The problem of poor sealing effect caused by rough and uneven hole walls is safe and reliable.

(3) A gas drainage and sealing device of the present utility model, the rear end of the second drainage pipe is equipped with a pressure gauge, which can display the pressure in the sealing device in real time, and has an intuitive view of the situation in the sealing device Perception can improve efficiency and facilitate operation.

(4) A gas drainage and sealing device of the present utility model uses a suction hole at the front end of the first drainage pipe, which can prevent the air intake hole of the drainage pipe from being blocked when the drill hole collapses, which is convenient, fast and safe .

(5) A gas pumping hole sealing device of the present utility model, the setting of the annular elastic gasket makes the elastic gasket and the drilled hole expand and tighten, so that the sealing effect is better, and the grouting liquid is sealed on the elastic gasket Between the rubber tube and the second discharge pipe, the second discharge pipe is not polluted, so that the second discharge pipe can be reused, saving materials, economical and environmentally friendly, and more convenient to use.

(6) A gas drainage and sealing device of the utility model, the front end of the first drainage pipe is equipped with a guide head, which can ensure that the gas sealing device is not blocked by coal slime, and the hole is entered more smoothly.

(7) In a gas drainage sealing device of the present utility model, the rear end of the second drainage pipe is equipped with an observation window, which can observe the drainage situation of water and coal particles in the hole at any time, and can determine the position of the sedimentation tank. Processing cycle, and then infer the internal conditions of the borehole and the coal wall where it is located, and provide information that cannot be obtained by other methods for mine pressure research.

(8) A gas pumping and sealing device of the present utility model has a tapered spiral blade, which not only can quickly and efficiently seal the hole, but also is easy to withdraw from the hole and can be used repeatedly.

(9) A gas drainage and sealing device of the utility model has simple structure, ingenious design, low production cost, good sealing effect, convenient operation, strong applicability, safety and reliability, and remarkable economic and social benefits.

Description of drawings

Fig. 1 is a schematic structural diagram of a gas drainage and sealing device of the present invention.

Explanation of the labels in the schematic diagram:

1. First extraction pipe; 11. Elastic gasket; 12. Filter; 13. Air extraction hole; 14. Guide head; 2. Second extraction pipe; 21. Observation window; 22. Second pressure gauge; 23 , valve; 3, rubber tube; 4, spiral blade; 5, intake pipe; 51, first pressure gauge; 52, pump; 6, grouting pipe.

detailed description

In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

Example 1

As shown in Figure 1, a gas drainage and sealing device in this embodiment includes a first drainage pipe 1, a second drainage pipe 2, a rubber tube 3, a spiral blade 4, an air inlet pipe 5 and a grouting pipe 6. The helical blade 4 is sleeved on the second extraction pipe 2. The helical blade 4 has a conical structure, which not only can seal the hole quickly and efficiently, but also can be easily withdrawn from the drilling hole and can be reused. The distance between the helical blade 4 And the height of the blade helix angle and the height of the helical blade keep changing in equal proportions respectively. The inner wall of the helical blade 4 is also provided with an internal thread, and the first extraction pipe 1 below the helical blade 4 is provided with a detachable annular The elastic gasket 11, the setting of the annular elastic gasket 11 makes the elastic gasket 11 and the drill hole tightened, so that the sealing effect is better, and the grouting fluid is sealed between the elastic gasket 11 and the rubber tube 3, without Pollution of the second discharge pipe 2 makes the second discharge pipe 2 reusable, saves materials, is economical and environmentally friendly, and is more convenient to use. The outer wall of the rear end of the second discharge pipe 2 is provided with a spiral blade 4 The external thread on the inner wall is engaged with the internal thread, the second discharge pipe 2 is threadedly connected with the first discharge pipe 1, the rear end of the second discharge pipe 2 is provided with a valve 23 and a second pressure gauge 22, the second pressure Table 22 can display the pressure in the hole sealer in real time, and has an intuitive perception of the situation in the hole sealer, can improve efficiency and facilitate operation. The rear end of the second extraction pipe 2 is also provided with an observation window 21, which can be used at any time Observing the drainage of water and coal particles in the hole can determine the treatment cycle of the sedimentation tank, and then infer the internal conditions of the drill hole and the coal wall where it is located, and provide information that cannot be obtained by other methods for mine pressure research. The rubber tube 3 is fixed on the first pumping tube 1 through a clamp, and the rubber tube 3 can quickly adapt to the inner wall pressure of the borehole, the gas pressure in the rubber tube 3 and the grout between the screw blade 4 and the rubber tube 3 during grouting The pressure can effectively solve the problem of poor sealing effect caused by rough and uneven drilling walls, and is safe and reliable. The front end of the first extraction pipe 1 is sequentially provided with a guide head 14, an air extraction hole 13 and a filter 12, and an air extraction hole 13 It can prevent the air intake hole of the first extraction pipe 1 from being blocked when the borehole collapses, which is convenient, fast and safe. The setting of the guide head 14 can ensure that the gas hole sealer is not blocked by coal slime, and the hole entry is smoother. The air inlet pipe 5 is embedded in the groove on the surface of the second exhaust pipe 2 and communicated with the rubber pipe 3. The air inlet pipe 5 is provided with a first pressure gauge 51, and the end of the air inlet pipe 5 is connected with an air source. The air source is an air pump 52, the outlet of the grouting pipe 6 is set in the gap between the spiral blade 4 and the rubber tube 3, and the grouting pipe 6 is embedded in another groove on the surface of the second extraction pipe 2 , through the grouting fluid between the rubber tube 3, the screw blade 4 and the rubber tube 3, and the screw blade 4 to simultaneously seal the drill hole, so as to overcome the problem of air leakage failure after the hole sealer is not tightly sealed or the coal body is deformed, It can also avoid the heavy workload of the secondary sealing and increase the construction cost. When sealing the hole, the rubber tube 3 is first expanded through the air inlet pipe 5, and the two ends of the rubber tube 3 are tied with clamps to form a convex-concave shape, which increases the distance between the rubber tube and the coal body. friction, followed by the grouting pipe 6 on the helical blade 4 and the rubber The grouting liquid is filled between the pipes 3, which plays a very good fixing role and prevents the gas pressure from being too high or the nozzle holes from pushing out the gas drainage pipe during hole sealing.

The above schematically describes the utility model and its implementation, which is not restrictive, and what is shown in the accompanying drawings is only one implementation of the utility model, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by it, and without departing from the purpose of the invention of the utility model, without creatively designing a structural mode and an embodiment similar to the technical solution, it shall belong to the utility model. protected range.

Claims (6)

1. a gas drainage hole packer, it is characterized in that: include the first releasing pipe (1), second releasing pipe (2), rubber tube (3), helical blade (4), air inlet pipe (5) and Grouting Pipe (6), described helical blade (4) is set on the second releasing pipe (2), the spacing of helical blade (4) and blade screw rise oblique angle, this three of the height of screw blade keeps respective equal proportion to change, the inwall of helical blade (4) is additionally provided with female thread, first releasing pipe (1) of helical blade (4) lower section is provided with dismountable cyclic spring pad (11), the outer wall of the rear end of described the second releasing pipe (2) is provided with the external screw thread being meshed with female thread on helical blade (4) inwall, second releasing pipe (2) and the first releasing pipe (1) are threaded connection, described rubber tube (3) is fixed on the first releasing pipe (1) by clip, described air inlet pipe (5) is embedded in the groove on the second releasing pipe (2) surface and is communicated in rubber tube (3), air inlet pipe (5) is provided with the first Pressure gauge (51), the end of air inlet pipe (5) is connected to source of the gas, the outlet of described Grouting Pipe (6) is arranged in the gap between helical blade (4) and rubber tube (3).

2. a kind of gas drainage hole packer according to claim 1, it is characterised in that: the rear end of described the second releasing pipe (2) is additionally provided with observation window (21).

3. a kind of gas drainage hole packer according to claim 2, it is characterised in that: described helical blade (4) is pyramidal structure.

4. a kind of gas drainage hole packer according to claim 3, it is characterised in that: the front end of described the first releasing pipe (1) is disposed with guide head (14), aspirating hole (13) and filter (12).

5. a kind of gas drainage hole packer according to claim 4, it is characterised in that: the rear end of described the second releasing pipe (2) is provided with valve (23) and the second Pressure gauge (22).

6. a kind of gas drainage hole packer according to claim 5, it is characterised in that: described source of the gas is inflator (52).