Multipurpose orifice device for ground gas extraction well in coal mine mining area

Abstract

The utility model discloses a multipurpose orifice device for a ground gas extraction well in a coal mine mining area, and relates to the technical field of coal mine collection, the multipurpose orifice device comprises a device main body, a lifting pipe, a mounting base and a top tray, the lower end of the device main body is fixedly connected with the mounting base, the lower end of the mounting base is provided with a mounting port, and an annular clamping groove is arranged above the mounting port; a sealing groove is formed in the middle of the annular clamping groove, a rubber sealing ring is clamped in the sealing groove, an annular clamping ring is fixedly connected to the rubber sealing ring, the annular clamping ring is clamped in the annular clamping groove, a left arc-shaped clamping plate and a right arc-shaped clamping plate are arranged in the mounting opening, a plurality of spring rods are fixedly connected to one sides of the arc-shaped clamping plates, and the spring rods are inserted in the mounting base. The lifting pipe is arranged below the mounting base, the top disc is fixedly connected to the upper end of the lifting pipe, the annular groove is formed in the outer side of the top disc, during mounting, the sealing performance between the threaded pipe and the mounting base can be enhanced through the rubber sealing ring, and the extraction hose can prevent gas leakage after the extraction inner pipe is broken.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a multi-purpose orifice device for a ground gas extraction well in a coal mining area. Background Art

[0002] Mine gas refers to the general term for toxic and harmful gases found underground, primarily methane, sometimes referred to separately. Gas is lighter than air, easily diffuses, and has high permeability, easily passing through adjacent rock layers and escaping through goaf. While the gas itself is non-toxic, it is unbreathable. When the concentration of gas in mine air exceeds 50%, it can cause death from suffocation due to lack of oxygen.

[0003] After searching, it was found that the Chinese patent with application number 202220730798.5 discloses a multi-purpose orifice device for ground gas extraction wells in coal mine mining areas, including a riser, a short-circuit mechanism is provided on the top of the riser, and the short-circuit mechanism includes an extraction pipeline connection port fixedly connected to the riser through a flange plate, and the outer wall on one side of the extraction pipeline connection port is connected with a vent valve, a special sealing interface and a sealing return slurry observation port, the vent valve is used to measure the gas content and exhaust before disassembling the orifice, the special sealing interface is connected to the grouting pipeline when sealing the hole, the sealing return slurry observation port is used to observe the reflux after the hole is closed, the outer wall on the other side of the extraction pipeline connection port is connected with a pressure observation interface, and the pressure observation interface plays the role of monitoring the wellhead pressure during extraction, and the flange movable cover is used for underground television observation during extraction of the ground gas extraction well.

[0004] Existing technology allows for the fixed connection of the extraction pipeline connection port to the riser via a flange. However, this flange connection can easily lead to insufficient sealing and gas leakage. Furthermore, the extraction inner pipe can easily break and leak if subjected to external forces. Therefore, those skilled in the art have provided a multi-use orifice device for surface gas extraction wells in coal mine mining areas to address the problems raised in the background art. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-purpose orifice device for ground gas extraction wells in coal mining areas, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A multi-purpose orifice device for ground gas extraction wells in coal mine mining areas includes a device body, a rising pipe, a mounting base and a top plate. The lower end of the device body is fixedly connected to the mounting base, and a mounting opening is provided at the lower end of the mounting base. An annular clamping groove is provided above the mounting opening, and a sealing groove is provided in the middle of the annular clamping groove. A rubber sealing ring is clamped in the sealing groove, and an annular clamping ring is fixedly connected to the rubber sealing ring, wherein the annular clamping ring is clamped in the annular clamping groove, and two groups of left and right arc-shaped splints are provided in the mounting opening, and a plurality of groups of spring rods are fixedly connected to one side of the arc-shaped splint, wherein the spring rods are inserted into the mounting base.

[0008] As a further solution of the present invention: a rising tube is provided under the mounting base, and a top plate is fixedly connected to the upper end of the rising tube, wherein the top plate is inserted into the mounting opening, and an annular groove is opened on the outer side of the top plate, wherein the arc-shaped splint is clamped in the annular groove.

[0009] As a further solution of the present invention: the upper end of the top plate is fixedly connected to a threaded tube, wherein the threaded tube is threadedly connected to the mounting base, the lower end of the rising tube is fixedly connected to an extraction inner tube, and the inner side of the extraction inner tube is fixedly connected to an extraction hose, wherein the extraction hose is made of rubber.

[0010] As a further solution of the present invention: a flange movable cover is movably installed on the upper end of the device body, a special sealing interface is connected and provided on the outer wall of one side of the device body, and a suction pipeline is connected and provided on the outer wall of the other side of the device body, and an air release valve is provided above the special sealing interface, wherein the air release valve and the device body are connected to each other.

[0011] As a further solution of the present invention: a sealing return slurry observation port is provided below the sealing special interface, wherein the sealing return slurry observation port is interconnected with the device body, and a pressure observation interface is provided above the extraction pipeline, wherein the pressure observation interface is interconnected with the device body.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. During installation, the rubber sealing ring can enhance the sealing between the threaded tube and the mounting base, and the rising tube can be removed from the mounting base, which is more flexible to use.

[0014] 2. The inner extraction tube is prone to breakage when subjected to external force collision, while the extraction hose is made of rubber and can be deformed when subjected to external force collision, and will not break like the extraction inner tube. In this way, the extraction hose can prevent gas leakage after the extraction inner tube breaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The diagram is a structural diagram of a multi-purpose orifice device for surface gas extraction wells in coal mining areas.

[0016] Figure 2 The present invention is a structural schematic diagram of an installation base and a riser pipe in a multi-purpose orifice device for a surface gas extraction well in a coal mining area.

[0017] Figure 3 The diagram shows the structure of a rubber sealing ring and a top plate in a multi-purpose orifice device for a surface gas extraction well in a coal mining area.

[0018] Figure 4 The present invention is a structural schematic diagram of an annular groove and a threaded pipe in a multi-purpose orifice device for a surface gas extraction well in a coal mining area.

[0019] Figure 5 The present invention is a structural schematic diagram of an annular clamping groove and a sealing groove in a multi-purpose orifice device for a surface gas extraction well in a coal mining area.

[0020] Figure 6 The diagram shows the structure of a spring rod and an arc-shaped clamping plate in a multi-purpose orifice device for a surface gas extraction well in a coal mining area.

[0021] In the figure: 1. Device body; 2. Air release valve; 3. Pressure observation interface; 4. Special interface for sealing hole; 5. Sealing hole return slurry observation port; 6. Extraction pipeline; 7. Mounting base; 8. Rising tube; 9. Extraction inner tube; 10. Extraction hose; 11. Rubber sealing ring; 12. Snap ring; 13. Threaded tube; 14. Annular groove; 15. Top plate; 16. Spring rod; 17. Arc splint; 18. Annular groove; 19. Sealing groove; 20. Flange movable cover. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figures 1 to 6In the embodiment of the present invention, a multi-purpose orifice device for ground gas extraction wells in coal mine mining areas includes a device body 1, a rising pipe 8, a mounting base 7 and a top plate 15. The lower end of the device body 1 is fixedly connected to the mounting base 7, and the lower end of the mounting base 7 is provided with a mounting opening. An annular clamping groove 18 is provided above the mounting opening, and a sealing groove 19 is provided in the middle of the annular clamping groove 18. A rubber sealing ring 11 is clamped in the sealing groove 19, and an annular clamping ring 12 is fixedly connected to the rubber sealing ring 11, wherein the annular clamping ring 12 is clamped in the annular clamping groove 18, and two groups of left and right arc-shaped splints 17 are provided in the mounting opening, and one side of the arc-shaped splint 17 is fixedly connected to a plurality of groups of spring rods 16, wherein the spring rods 16 are inserted into the mounting base 7, and a rising pipe 8 is provided below the mounting base 7. The upper end of the rising pipe 8 is fixedly connected to the top plate 15, wherein the top plate 15 is inserted in the mounting opening, and the outer side of the top plate 15 is provided with a An annular groove 14, in which an arc-shaped clamping plate 17 is clamped in the annular groove 14, a threaded tube 13 is fixedly connected to the upper end of the top plate 15, wherein the threaded tube 13 is threadedly connected to the mounting base 7, the lower end of the rising tube 8 is fixedly connected to the extraction inner tube 9, and the inner side of the extraction inner tube 9 is fixedly connected to the extraction hose 10, wherein the extraction hose 10 is made of rubber, a flange movable cover 20 is movably installed on the upper end of the device body 1, a special sealing interface 4 is connected on the outer wall of one side of the device body 1, and an extraction pipeline 6 is connected on the outer wall of the other side of the device body 1, an air release valve 2 is provided above the special sealing interface 4, wherein the air release valve 2 and the device body 1 are interconnected, a sealing return slurry observation port 5 is provided below the special sealing interface 4, wherein the sealing return slurry observation port 5 and the device body 1 are interconnected, a pressure observation interface 3 is provided above the extraction pipeline 6, wherein the pressure observation interface 3 and the device body 1 are interconnected.

[0024] The working principle of the present invention is as follows: during installation, the rubber sealing ring 11 can be first inserted into the sealing groove 19, and the clamping ring 12 can be clamped into the annular clamping groove 18, and then the top plate 15 can be inserted into the installation port, and the threaded tube 13 can be inserted into the middle of the rubber sealing ring 11. At this time, the arc clamping plate 17 will be clamped into the annular groove 14, and the arc clamping plate 17 will clamp and limit the top plate 15. Then, the top plate 15 is rotated, and the top plate 15 drives the threaded tube 13 to rotate, so that the threaded tube 13 and the mounting base 7 are threadedly connected together, wherein the rubber sealing ring 11 will enhance the sealing between the threaded tube 13 and the mounting base 7. When disassembly is required, the spring rod 16 can be pulled to both sides to cancel the restriction and clamping of the arc clamping plate 17 on the top plate 15, and then the top plate 15 can be rotated to release the connection between the threaded tube 13 and the mounting base 7, and the rising tube 8 can be removed from the mounting base 7. In this way, installation and disassembly are relatively simple and convenient. In addition, when the extraction inner tube 9 is broken, the extraction hose 10 can prevent gas leakage.

[0025] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A multi-purpose orifice device for a surface gas extraction well in a coal mining area, comprising a device body (1), a riser (8), a mounting base (7) and a top plate (15), characterized in that: The lower end of the device body (1) is fixedly connected to a mounting base (7), the lower end of the mounting base (7) is provided with a mounting opening, an annular clamping groove (18) is provided above the mounting opening, a sealing groove (19) is provided in the middle of the annular clamping groove (18), a rubber sealing ring (11) is clamped in the sealing groove (19), an annular clamping ring (12) is fixedly connected to the rubber sealing ring (11), wherein the annular clamping ring (12) is clamped in the annular clamping groove (18), and two groups of left and right arc-shaped clamping plates (17) are provided in the mounting opening, and a plurality of groups of spring rods (16) are fixedly connected to one side of each of the arc-shaped clamping plates (17), wherein the spring rods ( 16) is inserted on the mounting base (7), and a rising tube (8) is provided below the mounting base (7), and the upper end of the rising tube (8) is fixedly connected to a top plate (15), wherein the top plate (15) is inserted in the mounting opening, and an annular groove (14) is provided on the outer side of the top plate (15), wherein the arc-shaped clamping plate (17) is clamped in the annular groove (14), and the upper end of the top plate (15) is fixedly connected to a threaded tube (13), wherein the threaded tube (13) is threadedly connected to the mounting base (7), and the lower end of the rising tube (8) is fixedly connected to an extraction inner tube (9), and the inner side of the extraction inner tube (9) is fixedly connected to an extraction hose (10).

2. The multi-purpose orifice device for surface gas extraction wells in coal mining areas according to claim 1, characterized in that: A flange movable cover plate (20) is movably mounted on the upper end of the device body (1).

3. The multi-purpose orifice device for surface gas extraction wells in coal mining areas according to claim 1, characterized in that: A dedicated sealing interface (4) is provided on the outer wall of one side of the device body (1), and an extraction pipeline (6) is provided on the outer wall of the other side of the device body (1).

4. The multi-purpose orifice device for surface gas extraction wells in coal mining areas according to claim 3, characterized in that: An air release valve (2) is provided above the dedicated sealing interface (4), wherein the air release valve (2) and the device body (1) are in communication with each other.

5. The multi-purpose orifice device for surface gas extraction wells in coal mining areas according to claim 3, characterized in that: A sealing return slurry observation port (5) is provided below the sealing dedicated interface (4), wherein the sealing return slurry observation port (5) is communicated with the device body (1).

6. The multi-purpose orifice device for surface gas extraction wells in coal mining areas according to claim 3, characterized in that: A pressure observation interface (3) is provided above the extraction pipeline (6), wherein the pressure observation interface (3) and the device body (1) are in communication with each other.

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