Orifice sealer

Abstract

The orifice sealer comprises a grouting cavity and an exhaust cavity, the grouting cavity (10) is provided with a grouting opening (13), the exhaust cavity (20) is provided with an exhaust opening (23), the grouting cavity (10) and the exhaust cavity (20) are in butt joint and are hooped on a gas pipeline (40), and inner cavities of the grouting cavity (10) and the exhaust cavity (20) are communicated with gaps in the periphery of the gas pipeline. The grouting device has the beneficial effects that the grouting cavity and the exhaust cavity which are of a butt joint structure are adopted, the grouting device can be stably fixed to the opening of the gas drainage hole, the gas drainage hole is closed, a closed grouting space is formed, grouting is conducted through the grouting valve, exhaust is conducted through the exhaust valve, it can be guaranteed that the grouting process is conducted stably, and the grouting quality is guaranteed; and the operation of plugging the closed gas drainage hole can be simplified, the cost is reduced, the construction safety is improved, and the orifice sealer is simple in structure, convenient to manufacture and reusable.

Description

Technical Field

[0001] This invention relates to the construction technology of coal mine gas emission pipelines, and in particular to an orifice sealer. Background Technology

[0002] After drilling a gas drainage hole in a mine, a two-plugging and one-filling process must be performed. After this, a gap of about one meter in depth remains around the gas pipeline from the hole opening and needs to be filled. Currently, workers use AB glue to fill this gap. However, AB glue is expensive and easily produces carbon monoxide during use, posing a health hazard. Combined with the risks of a confined environment and limited ventilation in mine drilling, carbon monoxide concentrations can easily exceed safety thresholds. AB glue is a petroleum-based product, leaving a carbon footprint during production and use, and the waste glue is difficult to degrade. AB glue has a long curing time, typically around 17 minutes, which can easily lead to inaccurate mixing ratios or delayed filling, causing the glue to easily become ineffective and unusable, further increasing overall costs. There is also a high exposure risk, as manual mixing and filling require close proximity, leading to workers directly inhaling harmful gases. Furthermore, AB glue has high viscosity and poor flowability, making it difficult to fill the one-meter gap evenly, easily forming cavities or air pockets, resulting in seal failure and requiring rework. Summary of the Invention

[0003] The purpose of this invention is to provide an orifice sealer that improves the filling effect and operational safety of the gaps around gas pipelines, and reduces construction costs.

[0004] To achieve the above objectives, the technical solution of the present invention is: an orifice sealer, comprising a grouting cavity and an exhaust cavity, wherein the grouting cavity (10) is provided with a grouting port (13) and the exhaust cavity (20) is provided with an exhaust port (23), the grouting cavity (10) and the exhaust cavity (20) are connected and clamped on the gas pipeline (40), and the inner cavities of the grouting cavity (10) and the exhaust cavity (20) are connected to the gaps around the gas pipeline.

[0005] Furthermore, a preferred structure for the grouting cavity and the venting cavity is as follows: the grouting cavity (10) is a semi-cylindrical shell, the grouting cavity (10) includes a grouting cavity arc plate (11), one end of the grouting cavity arc plate (11) is provided with a grouting cavity bottom plate (12), and the grouting cavity bottom plate (12) is provided with a semi-circular first pipe hole (16); the venting cavity (20) is a semi-cylindrical shell, the venting cavity (20) includes a venting cavity arc plate (21), one end of the venting cavity arc plate (21) is provided with a venting cavity bottom plate (22), and the venting cavity bottom plate (22) is provided with a semi-circular second pipe hole (26).

[0006] Furthermore, in order to fix the orifice sealer at the orifice of the gas extraction hole, when the grouting cavity (10) and the exhaust cavity (20) are connected, the first pipe hole (16) and the second pipe hole (26) are tightly wrapped around the gas pipe (40).

[0007] Furthermore, in order to completely seal the opening of the gas extraction hole, the radius of the grouting cavity arc plate (11) is 110mm, and the radius of the exhaust cavity arc plate (21) is 110mm.

[0008] Furthermore, in order to control the grouting process, the grouting port (13) is a 19mm grouting port, and the grouting port (13) is connected to the grouting valve (3).

[0009] Furthermore, in order to ensure the quality of grouting, the vent (23) is a vent with a diameter of 17mm, and the vent (23) is equipped with a venting valve (4).

[0010] Furthermore, for ease of operation, the grouting cavity (10) is provided with a grouting cavity handle (17), and the venting cavity (20) is provided with a venting cavity handle (27).

[0011] Furthermore, in order to achieve docking and unfolding of the grouting cavity and the exhaust cavity, one side of the grouting cavity (10) and the exhaust cavity (20) are connected by a hinge (24), and the other side of the grouting cavity (10) and the exhaust cavity (20) are fixedly connected by a connecting bolt (2).

[0012] The beneficial effects of this invention are as follows: the grouting cavity and the venting cavity with the butt joint structure can be stably fixed at the orifice of the gas extraction hole and seal the gas extraction hole to form a closed grouting space. Grouting is performed through the grouting valve and venting is performed through the venting valve, which can ensure the stability of the grouting process, ensure the grouting quality, simplify the operation of sealing the gas extraction hole, reduce costs, improve construction safety, and the orifice sealer has a simple structure, is easy to manufacture, and can be reused.

[0013] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the present invention, showing the grouting cavity 10 and the venting cavity 20 in the unfolded state; Figure 2 This is an exploded view of the structure of the present invention; Figure 3 This is a structural diagram of the present invention, showing the grouting cavity 10 and the venting cavity 20 in a docked state; Figure 4 This is a schematic diagram showing a gap 32 between the gas extraction hole 30 and the gas pipe 40; Figure 5 This is a schematic diagram of the present invention, showing the orifice sealer straddling the gas pipeline 40; Figure 6 This is a schematic diagram of the orifice sealer of the present invention installed at the gas extraction orifice; Figure 7 This is a schematic diagram of grouting into the grouting cavity 10 and the venting cavity 20; Figure 8 This is a schematic diagram of completing the sealing of the gas pipeline orifice.

[0015] The diagram shows the following components: 2. Connecting bolt; 3. Grouting valve; 4. Venting valve; 10. Grouting cavity; 11. Grouting cavity arc plate; 12. Grouting cavity bottom plate; 13. Grouting port; 14. Connecting bolt hole; 16. First pipe hole; 17. Grouting cavity handle; 20. Venting cavity; 21. Venting cavity arc plate; 22. Venting cavity bottom plate; 23. Venting port; 24. Hinge; 25. Connecting through hole; 26. Second pipe hole; 27. Venting cavity handle; 30. Gas drainage hole; 31. Orifice of gas drainage hole; 32. Gap; 33. Grouting pipe; 34. Cement mortar; 35. Cement sealing block; 40. Gas pipe. Detailed Implementation

[0016] This invention discloses an orifice sealer. The technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments.

[0017] Example 1: like Figure 4 As shown, after the drilling of the mine gas drainage hole is completed, two plugging and one injection process must be performed. After the two plugging and one injection are completed, a gap 32 is left between the gas drainage hole 30 and the gas pipeline 40. The gap 32 is about one meter deep from the hole opening 31. To prevent gas leakage, the gap 32 needs to be filled. In this embodiment, the diameter of the gas drainage hole 30 is 150 mm, and the diameter of the gas pipeline 40 is 63 mm.

[0018] like Figures 1 to 3 A grout sealer for sealing the voids 32 around a gas pipeline by grouting, comprising a grouting chamber 10 and an exhaust chamber 20.

[0019] The grouting cavity 10 is a semi-cylindrical shell. It has a semi-circular grouting cavity arc plate 11, with a grouting cavity bottom plate 12 at one end and an open end at the other. The bottom plate 12 has a semi-circular first pipe hole 16, coaxial with the arc plate 11. The radius of the arc plate 11 is R1 = 110mm. The arc plate 11 has a grouting port 13, which connects to the inner cavity of the grouting cavity 10. For connection to a standard grouting pipe, the grouting port 13 is a 19mm grouting port, equipped with a grouting valve 3 connected to the grouting pipe 5. A grouting cavity gripper 17 is provided on the bottom plate 12.

[0020] The exhaust chamber 20 is a semi-cylindrical shell. It has a semi-circular exhaust chamber arc plate 21, with an exhaust chamber base plate 22 at one end and an open end at the other. The exhaust chamber base plate 22 has a semi-circular second pipe hole 26. The radius of the exhaust chamber arc plate 21 is R1 = 110 mm. The exhaust chamber 20 has an exhaust port 23 with a diameter of 17 mm, and a vent valve 4. An exhaust chamber gripper 27 is provided on the exhaust chamber base plate 22.

[0021] One side of the grouting cavity 10 and the exhaust cavity 20 are connected by a hinge 24. The other side of the grouting cavity 10 and the exhaust cavity 20 are fixedly connected by connecting bolts 2. The arc plate 11 of the grouting cavity is provided with a connecting screw hole 14, and the arc plate 21 of the exhaust cavity is provided with a connecting through hole 25. The connecting bolts 2 pass through the connecting through hole 25 and are tightened with the connecting screw hole 14 to fix the grouting cavity 10 and the exhaust cavity 20. After being fixedly connected by the connecting bolts 2, the grouting cavity 10 and the exhaust cavity 20 can be joined together to form a cylindrical cavity. The first pipe hole 16 of the grouting cavity and the second pipe hole 26 of the exhaust cavity are joined to form a circular hole corresponding to the gas pipe 40. The diameter R2 of the first pipe hole 16 and the second pipe hole 26 is slightly smaller than the diameter of the gas pipe 40. When the connecting bolts 2 are tightened, the first pipe hole 16 and the second pipe hole 26 are tightly fitted with the gas pipe.

[0022] During the filling of voids in the gas pipeline, the grouting cavity 10 and the venting cavity 20 are opened via hinge 24, and the orifice sealer is placed across the gas pipeline 40, as follows: Figure 5 As shown. In this embodiment, the grouting port 13 and the venting port 23 are on the unfolded side of the grouting cavity 10 and the venting cavity 20, and the open ends of the grouting cavity arc plate 11 and the venting cavity arc plate 21 face the gas extraction hole 30.

[0023] Next, the grouting cavity 10 and the exhaust cavity 20 are brought close to the port of the gas extraction hole 30, and the connecting bolt 2 is tightened to close the grouting cavity 10 and the exhaust cavity 20, forming a cylindrical cavity. The first pipe hole 16 and the second pipe hole 26 are tightly fitted around the gas pipe 40, thereby fixing the orifice seal at the port of the gas extraction hole. The inner cavities of the grouting cavity 10 and the exhaust cavity 20 are connected to the gap 32 around the gas pipe, forming a sealed space for grouting, which can be called the grouting space. Figure 6 As shown.

[0024] Grouting valve 3 is connected to grouting pipe 33. A grouting pump is used to inject cement-based grout (such as cement mortar or expansive cement grout) into grouting cavity 10 and venting cavity 20 through the grouting pipe. This embodiment uses cement mortar as an example. During the grouting process, gas in the grouting space can be discharged through vent port 23 and venting valve 4. The grouting process continues until the grouting space is completely filled. Figure 7 As shown.

[0025] After the injected cement mortar has initially set, loosen the connecting bolts 2, unfold the grouting cavity 10 and the venting cavity 20, and remove them from the gas pipeline 40. The gap 32 between the gas drainage hole 30 and the gas pipeline 40 is filled and sealed with cement mortar 34, and a cement sealing block 35 is also formed at the opening 31 of the gas drainage hole 30. Figure 8 As shown. This completes the sealing of the gas pipeline opening.

[0026] Grouting cavity gripper 17 and venting cavity gripper 27 are used for opening and closing grouting cavity 10 and venting cavity 20 and for installing orifice sealers.

[0027] This invention employs an orifice sealer in conjunction with a grouting pump to efficiently complete grouting and sealing work. The orifice sealer, combined with the grouting pump, enables high-pressure, continuous grouting with good grout flowability, capable of filling tiny pores and ensuring complete seal integrity. The orifice sealer has a simple structure and is quick to install, reducing construction time and improving grouting efficiency. In engineering practice, construction time can be reduced by more than 30%, and sealing reliability is enhanced, effectively preventing gas or water leakage, ensuring the long-term stability of gas drainage holes, and reducing subsequent maintenance costs.

[0028] In addition, grouting valves can control the flow rate and pressure of the grout. These valves allow for precise adjustment of the grout's flow rate and pressure, ensuring the grout fills every corner of the voids smoothly and evenly. This prevents uneven grouting, weak areas, or wasted cement mortar caused by uncontrolled pressure or flow. Grouting valves are common components of grouting equipment, facilitating connection and sealing with grouting pipelines. They provide a standard, reliable interface for quick and tight connection to the grouting pump, preventing grout leakage under high pressure and ensuring grouting efficiency and a clean working environment. When grouting needs to be paused or stopped, the grout valve can be immediately shut off to isolate the system, facilitating equipment maintenance and troubleshooting.

[0029] Air venting valves are installed to release air and prevent air blockage during grouting. Air in the grouting space is one of the main obstacles to the smooth filling of the grout. Air venting valves can expel this trapped air during grouting, preventing air blockage from hindering grout flow, which could lead to incomplete grouting and voids. Air venting valves ensure grout density, allowing the grout to completely fill the grouting space, thus ensuring the grout reaches the required strength. In addition, air venting valves facilitate observation of the grouting process; when grout flows out of the valve, it is a visual indication that the grouting space is basically filled, serving as an important process control indicator.

[0030] Sealing gas drainage holes is a crucial task in underground coal mines. After drilling, two plugs and one grouting process are required. After this, approximately one meter of space remains unfilled at the hole opening. Existing technology uses AB glue to fill this gap. However, AB glue is expensive and can generate carbon monoxide, posing a health hazard. This invention's hole sealer utilizes cement mortar for sealing the hole opening. Using cement mortar to seal the one-meter-deep gap effectively saves production costs and protects workers' health.

[0031] The orifice sealer of this invention has a significant cost advantage. The cement grout density is approximately 1.8 g / cm³, requiring only about 16 kg of material to fill a 1-meter gap, costing less than 1 / 10 of the cost of AB glue in existing technologies. The orifice sealer has a simple structure, uses widely available materials, can be manufactured on-site, has low manufacturing and maintenance costs, and is reusable. Furthermore, grouting pumps are common equipment in coal mining engineering, requiring no additional investment.

[0032] During construction, the orifice sealer allows for continuous and uniform injection of grout, reducing material waste and manual intervention. Grouting is performed via a grouting pump, and the curing process of the grout material is primarily physical precipitation with minimal chemical reactions, producing almost no harmful gases. By eliminating CO sources and reducing human exposure, this device directly lowers the risk of poisoning accidents, protecting workers' respiratory systems and overall health. Effectively, it reduces the incidence of occupational diseases, improves workplace safety, and lowers corporate medical and insurance expenditures.

Claims

1. An orifice sealer, characterized in that, It includes a grouting cavity and an exhaust cavity. The grouting cavity (10) is provided with a grouting port (13), and the exhaust cavity (20) is provided with an exhaust port (23). The grouting cavity (10) and the exhaust cavity (20) are connected and clamped on the gas pipeline (40). The inner cavity of the grouting cavity (10) and the exhaust cavity (20) are connected to the gap around the gas pipeline.

2. The orifice sealer according to claim 1, characterized in that, The grouting cavity (10) is a semi-cylindrical shell. The grouting cavity (10) includes a grouting cavity arc plate (11). One end of the grouting cavity arc plate (11) is provided with a grouting cavity bottom plate (12). The grouting cavity bottom plate (12) is provided with a semi-circular first pipe hole (16). The exhaust cavity (20) is a semi-cylindrical shell. The exhaust cavity (20) includes an exhaust cavity arc plate (21). One end of the exhaust cavity arc plate (21) is provided with an exhaust cavity bottom plate (22). The exhaust cavity bottom plate (22) is provided with a semi-circular second pipe hole (26).

3. The orifice sealer according to claim 2, characterized in that, When the grouting cavity (10) is connected to the exhaust cavity (20), the first pipe hole (16) and the second pipe hole (26) are tightly attached to the gas pipe (40).

4. The orifice sealer according to claim 2, characterized in that, The radius of the grouting cavity arc plate (11) is 110mm, and the radius of the exhaust cavity arc plate (21) is 110mm.

5. The orifice sealer according to claim 1, characterized in that, The grouting port (13) is a 19mm grouting port, and the grouting port (13) is connected to the grouting valve (3).

6. The orifice sealer according to claim 1, characterized in that, The exhaust port (23) is an exhaust port with a diameter of 17 mm, and the exhaust port (23) is equipped with an exhaust valve (4).

7. The orifice sealer according to claim 1, characterized in that, The grouting cavity (10) is provided with a grouting cavity handle (17), and the venting cavity (20) is provided with a venting cavity handle (27).

8. The orifice sealer according to claim 1, characterized in that, The grouting cavity (10) and the exhaust cavity (20) are connected on one side by a hinge (24), and the other side of the grouting cavity (10) and the exhaust cavity (20) are fixedly connected by a connecting bolt (2).

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