Air leakage prevention device for U-shaped water return pipe of closed wall
By installing a buoyancy ball and a sealing cap inside the U-shaped tube to prevent air leakage, the buoyancy control of the sealing cap to automatically seal the opening of the U-shaped tube solves the problem of spontaneous combustion of coal caused by air leakage in the sealed wall U-shaped tube, and achieves an automatic air leakage prevention effect.
Patent Information
- Application Number
- CN202520766754.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-04-22
AI Technical Summary
Water evaporation inside the U-shaped tube in the sealed wall can cause air to enter the sealed area, posing a risk of spontaneous combustion of coal. Current technology requires regular manual water replenishment to prevent air leakage.
Design a sealed wall anti-leakage U-shaped pipe anti-leakage device, which adopts a buoyancy ball and a cap structure. The buoyancy ball is used to control the cap to block the opening of the U-shaped pipe by rising or sinking. Combined with a guide ring and a limiting rod, the cap is sealed to prevent air from entering.
It achieves automatic sealing of the U-shaped pipe opening in the absence of water accumulation, preventing air from entering the confined area, avoiding spontaneous combustion of coal, and reducing human intervention.
Smart Images
Figure CN223881238U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a mine closed wall device technical field, and specifically is a closed wall anti -water U type pipe air leakage prevention device. BACKGROUND
[0002] For spontaneous combustion mine, the closed wall is adopted to close the goaf to form a closed area after the working face of the stoping face, and the closed wall is constructed tightly to prevent air leakage of the closed wall from causing spontaneous combustion. However, a large amount of accumulated water exists in the closed area, and in order to ensure that the accumulated water in the closed wall is effectively drained after the construction of the closed wall, a water drain hole with a gate is arranged at the bottom of the closed wall, and personnel are regularly arranged to drain water. All the water drain holes of the closed wall in the mine must be provided with an anti-water U type pipe or an anti-water pool to ensure that the accumulated water in the closed wall is timely drained; at the same time, after the accumulated water in the closed wall is drained, residual water remains in the U type pipe, and the residual water plays a plugging role to avoid air entering the closed area through the U type pipe.
[0003] However, after the closed wall is constructed for a period of time, the accumulated water in the closed area will be less or even none, and the evaporation of the residual water in the U type pipe will cause air to enter the goaf, and the phenomenon of spontaneous combustion of coal ash will occur, so it is necessary for the staff to regularly check and add water to the U type pipe to ensure that air will not enter the closed area through the U type pipe. UTILITY MODEL CONTENTS
[0004] In order to solve the problem that air enters the closed area due to the evaporation of water in the U type pipe in the prior art, the utility model provides a closed wall anti-water U type pipe air leakage prevention device, which prevents air from entering the closed area through the U type pipe and avoids the risk of oxidation and spontaneous combustion of coal.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the specific scheme that a closed wall anti-water U type pipe air leakage prevention device, the U type pipe includes a vertical part and a curved part, the air leakage prevention device includes a buoyancy ball movably arranged in the vertical part and a cover arranged outside the U type pipe and capable of plugging the opening of the U type pipe, a buoyancy rod fixedly connected to the buoyancy ball is arranged above the buoyancy ball, at least one guide ring is fixedly connected to the inner wall of the vertical part in a coaxial manner, and one end of the buoyancy rod away from the buoyancy ball penetrates through the guide ring and is connected to the cover.
[0006] As an optimization scheme of the above-mentioned closed wall anti-water U type pipe air leakage prevention device, a plurality of connecting rods are arranged on the guide ring in a circumferential direction, and one end of each connecting rod away from the guide ring is fixedly connected to the inner wall of the U type pipe.
[0007] As another optimization scheme of the above-mentioned closed wall anti-water U type pipe air leakage prevention device, a limiting rod is arranged on the buoyancy rod, and the limiting rod is located below the guide ring, and the limiting rod and the guide ring cooperate to limit the limit displacement of the buoyancy rod.
[0008] As another optimization scheme of the above-mentioned air-tight wall reverse water U-shaped pipe air leakage prevention device, a blind hole is coaxially arranged at the bottom of the cover for the U-shaped pipe to extend into.
[0009] As another optimization scheme of the above-mentioned air-tight wall reverse water U-shaped pipe air leakage prevention device, a blind hole is coaxially arranged at the bottom of the cover for the U-shaped pipe to extend into.
[0010] As another optimization scheme of the above-mentioned air-tight wall reverse water U-shaped pipe air leakage prevention device, a blind hole is coaxially arranged at the bottom of the cover for the U-shaped pipe to extend into.
[0011] As another optimization scheme of the above-mentioned air-tight wall reverse water U-shaped pipe air leakage prevention device, a blind hole is coaxially arranged at the bottom of the cover for the U-shaped pipe to extend into.
[0012] As another optimization scheme of the above-mentioned air-tight wall reverse water U-shaped pipe air leakage prevention device, a blind hole is coaxially arranged at the bottom of the cover for the U-shaped pipe to extend into.
[0013] As another optimization scheme of the above-mentioned air-tight wall reverse water U-shaped pipe air leakage prevention device, a blind hole is coaxially arranged at the bottom of the cover for the U-shaped pipe to extend into.
[0014] As another optimization scheme of the above-mentioned air-tight wall reverse water U-shaped pipe air leakage prevention device, a blind hole is coaxially arranged at the bottom of the cover for the U-shaped pipe to extend into.
[0015] Compared with the prior art, the air-tight wall reverse water U-shaped pipe air leakage prevention device has the following beneficial effects:
[0016] 1) The air-tight wall reverse water U-shaped pipe air leakage prevention device is provided, which is characterized in that a floating ball is movably arranged in the vertical portion of the U-shaped pipe, a floating rod is arranged on the floating ball, and a cover is arranged at the end of the floating rod away from the floating ball.
[0017] 2) In the air-tight wall reverse water U-shaped pipe air leakage prevention device, two guide rings are coaxially and fixedly connected to the inner wall of the vertical portion of the U-shaped pipe, so that the cover can be aligned with the opening of the U-shaped pipe for plugging during the falling process.
[0018] 3) In the air-tight wall reverse water U-shaped pipe air leakage prevention device, a sealing gasket is arranged at the bottom of the blind hole, and a sealing ring is arranged at the bottom of the annular clamping groove, so that the sealing performance of the air leakage prevention device is improved. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a structural schematic view of the U-shaped pipe air leakage prevention device;
[0020] Figure 2is a structural schematic view of the U-shaped pipe;
[0021] The reference signs: 1, U-shaped pipe, 2, buoyancy rod, 3, cover, 4, buoyancy ball, 5, limiting rod, 6, guide ring, 7, connecting rod, 8, blind hole, 9, annular snap ring, 10, annular snap groove. DETAILED DESCRIPTION
[0022] The technical scheme of the utility model will be further described in detail in combination with specific embodiments, and the parts not described and disclosed in the following embodiments of the utility model should be understood as the prior art known or should be known by the person skilled in the art.
[0023] Embodiment 1
[0024] As Figure 1 shown, a closed wall backwater U-shaped pipe anti-leakage device, the U-shaped pipe 1 includes vertical part and curved part, the U-shaped pipe 1 is made of metal or plastic material, as Figure 2 shown, the left side is curved part, and the opening is communicated with the water drain pipe of closed wall; The right side is vertical part, and the opening is communicated with the external environment; The curved part and the vertical part are integrally formed. The anti-leakage device includes a buoyancy ball 4 movably arranged in the vertical part and a cover 3 arranged outside the U-shaped pipe 1 and capable of blocking the opening of the U-shaped pipe 1. The buoyancy ball 4 is a hollow ball, and the density of the buoyancy ball 4 is less than the density of water, so that the buoyancy ball 4 can float in water. The cover 3 is a circular cover plate, and the diameter of the cover plate is slightly larger than the opening end surface of the U-shaped pipe 1, so as to block the opening of the U-shaped pipe 1 in the case that there is no water accumulation in the U-shaped pipe 1, and avoid air entering the closed wall from the opening of the U-shaped pipe 1.
[0025] A buoyancy rod 2 is arranged above the buoyancy ball 4 and fixedly connected with the buoyancy ball 4, and at least one guide ring 6 is fixedly connected with the inner wall of the vertical part in a coaxial manner, the number of the guide rings 6 is two, and the two guide rings 6 are distributed along the height direction of the vertical part. The inner diameter of the guide ring 6 is slightly larger than the outer diameter of the buoyancy rod 2, one end of the buoyancy rod 2 away from the buoyancy ball 4 penetrates through the guide ring 6 and is connected with the cover 3. The guide ring 6 is provided with a plurality of connecting rods 7 along the circumferential direction, and one end of the connecting rod 7 away from the guide ring 6 is fixedly connected with the inner wall of the U-shaped pipe 1. The number of the connecting rods 7 is four, and the connecting rod 7 is welded or adhesively fixed with the inner wall of the U-shaped pipe 1, so as to ensure the stable movement of the buoyancy rod 2 in the vertical direction, and the cover 3 can be aligned with the U-shaped pipe 1 and blocked in the case that there is no water accumulation in the U-shaped pipe 1.
[0026] The materials of the buoyancy ball 4, the buoyancy rod 2 and the cover 3 are plastic, specifically, polypropylene or high-density polyethylene injection molding is adopted, which has the characteristics of corrosion resistance, light weight and high strength, and is suitable for the environment of long-term contact with water.
[0027] The basic embodiment of the utility model is above, can make further improvement, optimization and limitation on the basis, thereby obtains each embodiment below:
[0028] Embodiment 2
[0029] This embodiment is an improved scheme based on embodiment 1, and the main structure is same with embodiment 1, and the improvement point is that:
[0030] As shown in Figure 1 , Figure 2 , the limiting rod 5 is arranged on the buoyant rod 2, the length of the limiting rod 5 is greater than the inner diameter of the guide ring 6 and less than the inner diameter of the U-shaped pipe 1, and the limiting rod 5 is located below the guide ring 6, when the buoyant ball 4 is driven by water level change to make the buoyant rod 2 rise, the limiting rod 5 contacts with the guide ring 6, the limiting rod 5 cooperates with the guide ring 6 to limit the limit displacement of the buoyant rod 2, to avoid the cover 3 from separating from the U-shaped pipe 1.
[0031] Embodiment 3
[0032] This embodiment is an improved scheme based on embodiment 1, and the main structure is same with embodiment 1, and the improvement point is that:
[0033] As shown in Figure 1 , Figure 2 , the blind hole 8 for the U-shaped pipe 1 to extend into is coaxially arranged at the bottom of the cover 3. The inner diameter of the blind hole 8 is not less than the outer diameter of the U-shaped pipe 1, the blind hole 8 is provided with a sealing pad at the bottom, and the material of the sealing pad is rubber. The annular clasp ring 9 is arranged in the blind hole 8, and the annular clasp ring 9 is integrally formed with the cover 3. The annular clasp groove 10 for the annular clasp ring 9 to extend into is arranged on the open end surface of the U-shaped pipe 1, the annular clasp groove 10 is provided with a sealing ring at the bottom, and the end surface of the annular clasp ring 9 can abut against the bottom of the annular clasp groove 10, when the cover 3 descends to the open end surface of the U-shaped pipe 1, the annular clasp ring 9 is embedded in the annular clasp groove 10, to enhance the sealing property and prevent the cover from deviating.
[0034] The working process of the anti-leakage U-shaped pipe 1 device is as follows: when there is accumulated water in the closed wall, the accumulated water flows into the anti-leakage U-shaped pipe 1 from the water outlet hole, and the water level of the U-shaped pipe 1 gradually moves upward. The buoyant ball 4 starts to float upward under the buoyant force because the density of the buoyant ball 4 is less than the density of water, drives the buoyant rod 2 and the cover 3 to move upward along the vertical direction. The cover 3 separates from the opening of the U-shaped pipe 1, so that the accumulated water flows out from the opening of the U-shaped pipe 1; the buoyant rod 2 is guided by the guide ring 6 arranged on the inner wall of the U-shaped pipe 1, to ensure the verticality of the movement track and avoid deviation.
[0035] When the water in the anti-water U-shaped pipe 1 is evaporated over time, the water in the U-shaped pipe 1 disappears or the water level drops, the buoyancy ball 4 sinks due to the decrease of the buoyancy and the self gravity, the buoyancy rod 2 and the cover 3 drop, the annular snap ring 9 on the cover 3 is embedded in the annular clamping groove 10, thereby blocking the opening of the U-shaped pipe 1, preventing air from entering the airtight wall from the opening, and avoiding the oxidation and spontaneous combustion of the coal ash in the airtight wall due to contact with air.
[0036] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. Airtight wall anti-water U-shaped pipe air leakage prevention device, the U-shaped pipe (1) comprising a vertical portion and a curved portion, characterized in that: The air leakage prevention device comprises a buoyancy ball (4) movably arranged in a vertical part and a cover (3) arranged outside the U-shaped pipe (1) and capable of blocking the opening of the U-shaped pipe (1), a buoyancy rod (2) is arranged above the buoyancy ball (4) and fixedly connected with the buoyancy ball (4), at least one guide ring (6) is coaxially fixedly connected with the inner wall of the vertical part, and the end of the buoyancy rod (2) away from the buoyancy ball (4) penetrates through the guide ring (6) and is connected with the cover (3).
2. The air leakage prevention device for the U-shaped pipe of the air barrier wall according to claim 1, characterized in that: The guide ring (6) is provided with a plurality of connecting rods (7) along the circumference thereof, and the end of the connecting rod (7) away from the guide ring (6) is fixedly connected with the inner wall of the U-shaped pipe (1).
3. The air leakage prevention device for the inverted U-shaped pipe of the air barrier wall according to claim 1, characterized in that: The buoyancy rod (2) is provided with a limiting rod (5), and the limiting rod (5) is located below the guide ring (6), and the limiting rod (5) cooperates with the guide ring (6) to limit the extreme displacement of the buoyancy rod (2).
4. The air leakage preventing device for the inverted U-shaped pipe of the air barrier wall according to claim 1, characterized in that: The bottom of the cover (3) is coaxially provided with a blind hole (8) for the U-shaped pipe (1) to extend into.
5. The air leakage preventing device for the inverted U-shaped pipe of the air barrier wall according to claim 4, characterized in that: The bottom of the blind hole (8) is provided with a sealing gasket.
6. The air leakage preventing device for the inverted U-shaped pipe of the air barrier wall according to claim 4, characterized in that: The blind hole (8) is provided with an annular clasp ring (9), the opening end surface of the U-shaped pipe (1) is provided with an annular clamping groove (10) for the annular clasp ring (9) to extend into, and the end surface of the annular clasp ring (9) can abut against the bottom of the annular clamping groove (10).
7. The air leakage preventing device for the inverted U-shaped pipe of the air barrier wall according to claim 6, characterized in that: The bottom of the annular clamping groove (10) is provided with a sealing ring.
8. The air leakage preventing device for the inverted U-shaped pipe of the air barrier wall according to claim 1, characterized in that: The number of the guide rings (6) is two, and the two guide rings (6) are distributed along the height direction of the vertical part.
9. The air leakage preventing device for the inverted U-shaped pipe of the air barrier wall according to claim 1, characterized in that: The materials of the buoyancy ball (4), the buoyancy rod (2) and the cover (3) are plastic.
10. A closed-wall reverse U-shaped pipe comprising a vertical portion and a curved portion, characterized in that: The vertical part is provided with the air leakage prevention device according to any one of claims 1-9.