Device for preventing casing from moving downwards

Abstract

The utility model discloses an anti-downward-channeling device for a sleeve, which relates to the field of coal mine gas extraction and comprises a first sheath, a first through hole, a second sheath, a second through hole and a connecting piece, a first through hole is formed in the first sheath, a second through hole is formed in the second sheath, the first sheath is flexibly connected with the second sheath, and the first through hole and the second through hole are staggered; and the second sheath can be mounted at the orifice of the sleeve through the connecting piece. Compared with the prior art, the device has the advantages that friction resistance is increased through dislocation of the first through holes and the second through holes, when abnormal conditions occur in the holes, the first protective leather can effectively prevent sewage and pulverized coal sprayed out of the gas spraying holes from hurting people, the second protective leather can effectively prevent a sleeve from quickly moving downwards, a protective net is formed by the device, and the safety of the device is improved. And the safety risk existing in the casing running construction process of workers can be effectively reduced, and the life safety of the constructors is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of coal mine gas extraction, in particular to a casing anti-falling device. Background Art

[0002] In the current gas control model in mining areas, most of the coal seam outburst elimination work is achieved by drilling through the layers in the roof and floor lanes and drilling along the layers in the two lanes of the working face. When drilling and sealing the holes, PVC pipes are usually manually lowered. Due to differences in pipe materials and abnormal reasons such as geological structures, the casing is easy to slip downward, and there is a great safety risk in sealing the holes. In addition, during the construction process of manual casing lowering, there is a large amount of gas in the hole and water out of the hole, which is prone to delayed blowout and injuries. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to reduce the safety risks existing in the casing construction process.

[0004] The utility model solves the above technical problems through the following technical means: a casing anti-downward movement device, comprising a first protective skin, a first through hole, a second protective skin, a second through hole and a connecting piece; the first protective skin is provided with a first through hole, the second protective skin is provided with a second through hole, the first protective skin is softly connected with the second protective skin, and the first through hole is staggered with the second through hole; the second protective skin can be installed at the casing hole through the connecting piece. After the drilling construction is completed, the drilling enters the hole sealing stage. Before the hole sealing, the device is hung on the side of the casing hole through the connecting piece, and the casing is successively passed through the second through hole and the first through hole and then lowered into the casing hole, and the friction resistance is increased by the misalignment of the first through hole and the second through hole; when an abnormal situation occurs in the hole, the first protective skin can effectively prevent the sewage and coal powder sprayed from the gas spray hole from injuring people, and the second protective skin can effectively prevent the casing from quickly downward movement; the device forms a protective net, which can effectively reduce the safety risks of personnel in the casing construction process and ensure the life safety of construction personnel.

[0005] As an optimized technical solution, the size of the first protective skin is larger than that of the second protective skin.

[0006] As an optimized technical solution, the first protective skin and the second protective skin are both rectangular.

[0007] As an optimized technical solution, both the first protective skin and the second protective skin are made of belt rubber.

[0008] As an optimized technical solution, the casing anti-falling device also includes a chain, and the four corners of the first protective skin are respectively connected to the second protective skin through the chains.

[0009] As an optimized technical solution, the casing anti-falling device also includes screws, one end of each chain is fixedly connected to the first protective skin through a screw, and the other end is fixedly connected to the second protective skin through a screw.

[0010] As an optimized technical solution, the chain is an iron chain.

[0011] As an optimized technical solution, the connecting parts are provided with four groups, and the four groups of connecting parts can be installed at the four corners of the second protective skin respectively.

[0012] As an optimized technical solution, the connecting piece adopts a steel wire rope.

[0013] As an optimized technical solution, rope buckles are respectively provided at both ends of the connecting member. The rope buckle at one end of each connecting member can be buckled with the hole opened on the second protective skin, and the rope buckle at the other end can be buckled with the fixing device arranged on the side of the casing hole.

[0014] The advantages of the utility model are that the device utilizes the misalignment of the first through hole and the second through hole to increase the friction resistance. When an abnormal situation occurs in the hole, the first protective skin can effectively prevent sewage and coal powder sprayed from the gas nozzle from injuring people, and the second protective skin can effectively prevent the casing from quickly running down. The device forms a protective net, which can effectively reduce the safety risks of personnel during the casing construction process and ensure the life safety of construction personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a casing anti-falling device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described in combination with the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0017] like Figure 1 As shown, an embodiment of the utility model discloses a casing anti-falling device, including a first protective skin 1, a first through hole 2, a second protective skin 3, a second through hole 4, a chain 5, a screw 6 and a connecting piece 7.

[0018] A first through hole 2 is provided on the first protective skin 1, a second through hole 4 is provided on the second protective skin 3, the first protective skin 1 is softly connected to the second protective skin 3, and the first through hole 2 is staggered with the second through hole 4; the size of the first protective skin 1 is larger than that of the second protective skin 3; the first protective skin 1 and the second protective skin 3 are both rectangular, the size of the first protective skin 1 is 50cm*60cm, and the size of the second protective skin 3 is 15cm*35cm; the first protective skin 1 and the second protective skin 3 are both made of belt rubber.

[0019] The four corners of the first protective skin 1 are connected to the second protective skin 3 through chains 5 respectively, so as to realize the soft connection between the first protective skin 1 and the second protective skin 3; one end of each chain 5 is fixedly connected to the first protective skin 1 through a screw 6, and the other end is fixedly connected to the second protective skin 3 through a screw 6. The chain 5 is an iron chain, and the length of the screw 6 is 8 cm.

[0020] The connecting piece 7 is made of steel wire rope, and four connecting pieces 7 can be installed at the four corners of the second protective skin 3 respectively, and the second protective skin 3 can be installed at the position of the casing hole through the connecting piece 7; the connecting piece 7 is made of steel wire rope, and the rope diameter is 0.5 cm; rope buckles are respectively provided at both ends of the connecting piece 7, and the rope buckle at one end of each connecting piece 7 can be buckled with the hole opened on the second protective skin 3, and the rope buckle at the other end can be buckled with the fixing device set on the side of the casing hole.

[0021] Working principle: Check the integrity of the device before use to ensure that all components are securely fastened; after the drilling construction is completed, the drilling enters the sealing stage. Before sealing the hole, the device is hung on the casing hole through the connecting piece 7, and the casing is successively passed through the second through hole 4 and the first through hole 2 and then lowered into the casing hole, and the misalignment of the first through hole 2 and the second through hole 4 is used to increase the friction resistance; when an abnormal situation occurs in the hole, the first protective skin 1 can effectively prevent the sewage and coal powder sprayed from the gas spray hole from injuring people, and the second protective skin 3 can effectively prevent the casing from quickly running down; the device forms a protective net, which can effectively reduce the safety risks of personnel during the casing construction process and ensure the life safety of construction personnel; it is simple to make, low cost, easy to install, easy to carry, simple to operate, and has a strong targeted protection effect on the safety hazards of casing running down and delayed spraying holes injuring people when the current professional gas control drilling team seals the hole and lays the casing.

[0022] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casing anti-downflow device, Features: It includes a first protective skin, a first through hole, a second protective skin, a second through hole and a connecting piece; the first protective skin is provided with a first through hole, the second protective skin is provided with a second through hole, the first protective skin is softly connected to the second protective skin, and the first through hole is staggered with the second through hole; the second protective skin can be installed on the sleeve opening through the connecting piece.

2. The casing anti-falling device according to claim 1, Features: The first sheath has a size greater than that of the second sheath.

3. The casing anti-falling device according to claim 1, Features: The first protective skin and the second protective skin are both rectangular.

4. The casing anti-falling device according to claim 1, Features: The first protective skin and the second protective skin are both made of belt rubber.

5. The casing anti-falling device according to claim 1, Features: The casing anti-falling device also includes a chain, and the four corners of the first protective skin are respectively connected to the second protective skin through the chains.

6. The casing anti-falling device according to claim 5, Features: The casing anti-falling device also includes screws, one end of each chain is fixedly connected to the first protective skin through a screw, and the other end is fixedly connected to the second protective skin through a screw.

7. The casing anti-falling device according to claim 5, Features: The chain is an iron chain.

8. The casing anti-falling device according to claim 1, Features: The connecting parts are provided with four groups, and the four groups of connecting parts can be respectively installed at the four corners of the second protective skin.

9. The casing anti-falling device according to claim 8, Features: The connecting piece is a steel wire rope.

10. The casing anti-falling device according to claim 9, Features: Rope buckles are respectively arranged at both ends of the connecting member. The rope buckle at one end of each connecting member can be buckled with the eyelet opened on the second protective skin, and the rope buckle at the other end can be buckled with a fixing device arranged on the side of the sleeve hole.

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