Coal mine paste filling pipeline dynamic adjusting device

Abstract

The utility model relates to the field of coal mine paste filling technology, specifically disclose a kind of coal mine paste filling pipeline dynamic regulating device, it includes: with the bypass pipe of filling pipeline communication, with the regulating cylinder of bypass pipe one end away from filling pipeline connection, regulating cylinder inside is provided with the sliding plate of being able to slide along its inner wall;There is also bellows, one end is open, the other end is closed, open one end sealing connection on the inner wall of regulating cylinder, closed one end is connected on sliding plate;The edge of sliding plate is connected with the sliding block extending to the outside of regulating cylinder, the sidewall of regulating cylinder is provided with the sliding slot for the sliding block sliding;Regulating cylinder outside is provided with the recovery component connected with sliding block, recovery component can drive sliding plate to make bellows restore to compressed state, the utility model dynamically regulates the conveying pressure of filling pipeline in certain range, also avoid the phenomenon of safety valve frequent opening and closing in pumping system.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine paste filling technology, and relates to a dynamic adjustment device for coal mine paste filling pipeline. Background Technology

[0002] Coal mine paste backfilling is a mining technology that mixes materials such as coal gangue, fly ash, and cement to form a paste-like slurry, which is then transported through pipelines to the goaf for backfilling. This technology has advantages such as good fluidity, high filling density, and minimal environmental impact. It can effectively control roof deformation and improve mining efficiency and safety.

[0003] The process of paste filling includes material preparation, batching and slurry preparation, pipeline transportation and filling. During the paste transportation process, the paste is often transported to the goaf through pipelines by a pumping system. The paste is viscous, and the pumping system will generate pressure fluctuations. Since the transportation pipeline is a regular rigid pipe, it cannot automatically regulate the pressure inside the pipe, which will cause the safety valve in the pumping system to open and close frequently, which also affects the stability of the transportation pressure in the pipeline. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a dynamic adjustment device for coal mine paste filling pipelines, which effectively solves the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A dynamic adjustment device for coal mine paste filling pipelines, comprising:

[0006] A bypass pipe, connected to the filling pipeline;

[0007] An adjusting cylinder is connected to the end of the bypass pipe that is away from the filling pipeline; the adjusting cylinder is provided with a sliding plate that can slide along its inner wall;

[0008] A bellows, with one end open and the other end closed, the open end is sealed and connected to the inner wall of the regulating cylinder, and the closed end is connected to the slide plate;

[0009] The edge of the slide plate is connected to a slider that extends to the outside of the adjusting cylinder. The side wall of the adjusting cylinder is provided with a groove for the slider to slide. The outside of the adjusting cylinder is provided with a return component connected to the slider. The return component can drive the slide plate to restore the bellows to a compressed state.

[0010] Furthermore, the recovery assembly includes a connecting plate connected to the end of the regulating cylinder away from the bypass pipe, a guide rod perpendicularly connected to the connecting plate, and a spring sleeved on the guide rod. The slider has a through hole for the guide rod to pass through. One end of the spring is connected to the slider, and the other end is connected to the end of the guide rod.

[0011] Furthermore, the recovery assembly includes a connecting plate connected to the end of the regulating cylinder away from the bypass pipe, a piston cylinder perpendicularly connected to the connecting plate, and a piston installed in the piston cylinder. The piston is connected to the slider via a piston shaft.

[0012] Furthermore, the regulating cylinder and the bypass pipe are connected by a flange structure.

[0013] Furthermore, a plurality of omnidirectional balls are evenly distributed along the axis of the side wall of the slide plate, and the balls of the omnidirectional balls are in contact with the inner wall of the adjusting cylinder.

[0014] Furthermore, at least two microswitches are provided on one side of the slide and along its length, and the slider can trigger the microswitches to emit electrical signals when it passes the position of the microswitches.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In this utility model, a bypass pipe and an adjusting cylinder are connected, and a bellows is installed in the adjusting cylinder. If the pressure in the filling pipeline is too high, paste will be filled into the bellows and the bellows will elongate. If the pressure in the filling pipeline drops, the sliding plate will compress the bellows under the action of the recovery component, and the paste in the bellows will be replenished into the filling pipeline. The conveying pressure of the filling pipeline can be dynamically adjusted within a certain range, which also avoids the phenomenon of frequent opening and closing of the safety valve in the pumping system.

[0017] 2. In this utility model, the electrical signal emitted by the micro switch can be used to provide feedback on the pressure status in the filling pipeline. Attached Figure Description

[0018] Figure 1 This is an internal sectional view of Example 1;

[0019] Figure 2 This is the main view of the response component in Example 1;

[0020] Figure 3 for Figure 1 Enlarged view of part A in the image;

[0021] Figure 4 This is the main view of the response component in Example 2;

[0022] Figure 5 for Figure 4 Enlarged view of part B in the image.

[0023] In the diagram: 1. Bypass pipe; 2. Adjusting cylinder; 3. Slide plate; 4. Bellows; 5. Slider; 6. Slide groove; 7. Connecting plate; 8. Guide rod; 9. Spring; 10. Piston cylinder; 11. Piston; 12. Piston shaft; 13. Universal ball; 14. Micro switch. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figure 1 , Figure 2 As shown, this utility model proposes a dynamic adjustment device for a coal mine paste filling pipeline, including a bypass pipe 1, an adjusting cylinder 2, and a corrugated pipe 4; the bypass pipe 1 is connected to the filling pipeline and is welded by full welding to ensure the sealing of the bypass pipe 1 and the filling pipeline; the adjusting cylinder 2 is connected to the end of the bypass pipe 1 away from the filling pipeline through a flange structure; and the corrugated pipe 4 is open at one end and closed at the other end, with the open end sealed to the inner wall of the adjusting cylinder 2 and the closed end bonded to the sliding plate 3;

[0027] A sliding plate 3 is installed inside the regulating cylinder 2, and a groove 6 is provided on the side wall of the regulating cylinder 2. A slider 5 that can extend to the outside of the regulating cylinder 2 is integrally connected to the edge of the sliding plate 3. The slider 5 is located inside the groove 6 and can slide along it. A return component connected to the slider 5 is provided on the outside of the regulating cylinder 2.

[0028] In this embodiment, the recovery assembly includes a connecting plate 7, a guide rod 8, and a spring 9. Specifically, the end of the adjusting cylinder 2 away from the bypass pipe 1 has a notch, and the connecting plate 7 is fixed in the notch by a screw structure. One end of the guide rod 8 is vertically welded to the connecting plate 7 and is parallel to the length extension direction of the slide groove 6. The other end of the guide rod 8 can abut against the flange of the adjusting cylinder 2. The slider 5 has a through hole for the guide rod 8 to pass through.

[0029] In one embodiment, the spring 9 is a tension spring and is sleeved on the end of the guide rod 8 away from the connecting plate 7. When installing the tension spring, a pin (not shown in the figure) is integrally connected to both the slider 5 and the guide rod 8, and the pin is perpendicular to the guide rod 8. Both ends of the tension spring are hung on the pin. When the slider 5 slides along the groove 6 away from the filling pipeline, the tension spring will generate tension. When the pressure in the filling pipeline decreases, it will drive the slider 5 to slide towards the flange so that the bellows 4 returns to the compressed state.

[0030] In another embodiment, the spring 9 is a compression spring and is sleeved on the end of the guide rod 8 away from the filling pipeline. One end of the compression spring abuts against the slider 5 and the other end abuts against the connecting plate 7. When the slider 5 slides along the groove 6 away from the filling pipeline, the compression spring will generate pressure. Similarly, when the pressure in the filling pipeline drops, it can drive the slider 5 to slide towards the flange so that the bellows 4 returns to the compressed state.

[0031] In this embodiment, as Figure 3 As shown, a countersunk hole is provided on the side wall of the slide plate 3, and a universal ball 13 is installed in the countersunk hole. Multiple universal balls 13 are evenly distributed along the axis of the slide plate 3. The ball of the universal ball 13 is in contact with the inner wall of the adjusting cylinder 2. When the slide plate 3 moves inside the adjusting cylinder 2, the universal ball 13 can reduce the friction, making the slide plate 3 move more smoothly.

[0032] In this embodiment, at least two microswitches 14 are installed on one side of the slide 6 and along its length. When the slider 5 passes the position of the microswitch 14, it can trigger the microswitch 14 to emit an electrical signal. The microswitch 14 can be connected to a controller, which is used to receive the electrical signal emitted by the microswitch 14. Specifically, there can be two microswitches 14. When the microswitch 14 closer to the flange emits an electrical signal, it indicates that the opening pressure of the safety valve of the pumping system has been reached. When the microswitch 14 farther from the flange emits an electrical signal, it indicates that the filling pipeline has been blocked. This facilitates subsequent maintenance work by the staff. Preferably, the slider 5 is cylindrical, which allows for smoother contact with the microswitch 14.

[0033] In this embodiment, an installation ring is fitted onto the open end of the bellows 4. Both the installation ring and the adjusting cylinder 2 are made of metal. The installation ring is connected to the adjusting cylinder 2 by full welding to ensure a tight seal. Then, the bellows 4 is inserted into the installation ring and sealed with sealant. After prolonged use, if solidified grease accumulates in the bellows 4, the adjusting cylinder 2 can be disassembled and the bellows 4 cleaned, or the adjusting cylinder 2 and all its internal components can be replaced.

[0034] When this invention is used, the paste is pumped into the filling pipeline. Simultaneously, due to the pumping pressure, the paste enters the bellows 4, at which point the bellows 4 extends and pushes the slide plate 3 to slide along the inner wall of the regulating cylinder 2. The return component outside the regulating cylinder 2 generates a restoring force. If the delivery pressure in the filling pipeline continues to increase, the bellows 4 will continue to extend. If the pressure in the filling pipeline decreases, the restoring force of the return component will cause the drive slide plate 3 to compress the bellows 4, and the paste in the bellows 4 will replenish the filling pipeline. The delivery pressure of the filling pipeline is automatically adjusted within a certain pressure range, and the frequent opening and closing of the safety valve in the pumping system is also avoided.

[0035] It should be noted that, since the filling pipeline has a certain length, multiple units of this utility model are installed on the filling pipeline to achieve the required adjustment.

[0036] Example 2

[0037] Compared with Embodiment 1 above, the difference lies in the structure of the response component, specifically: as follows: Figure 4 , Figure 5 As shown, the recovery assembly includes a connecting plate 7, a piston cylinder 10, and a piston 11. Specifically, the end of the regulating cylinder 2 facing away from the bypass valve has a notch, and the connecting plate 7 is fixed in the notch by screws. The end of the piston cylinder 10 facing away from the slider 5 is integrally connected to a lug with mounting holes (not shown in the figure), and the lug is perpendicular to the piston cylinder 10. The piston cylinder 10 is vertically connected to the connecting plate 7 by screws and the lug. The piston 11 is installed inside the piston cylinder 10 and forms a sealed cavity with the inside of the piston cylinder 10. The piston 11 is connected to a piston shaft 12 extending out of the piston cylinder 10. The end of the piston shaft 12 near the slider 5 is also integrally connected to a lug with mounting holes. The piston shaft 12 is connected to the slider 5 by screws and the lug. When the bellows 4 is filled with paste and elongates, the slider 5 drives the piston 11 through the piston shaft 12 to compress the air inside the piston cylinder 10, thereby generating a recovery force. When the pressure in the filling pipeline decreases, it will cause the drive slide plate 3 to compress the bellows 4.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dynamic adjustment device for coal mine paste filling pipelines, characterized in that, include: Bypass pipe (1) is connected to the filling pipeline; The regulating cylinder (2) is connected to one end of the bypass pipe (1) away from the filling pipeline; the regulating cylinder (2) is provided with a sliding plate (3) that can slide along its inner wall. The bellows (4) has one open end and the other closed end. The open end is sealed and connected to the inner wall of the regulating cylinder (2), and the closed end is connected to the slide plate (3). The edge of the slide plate (3) is connected to a slider (5) extending to the outside of the regulating cylinder (2). The side wall of the regulating cylinder (2) is provided with a groove (6) for the slider (5) to slide. The outside of the regulating cylinder (2) is provided with a return component connected to the slider (5). The return component can drive the slide plate (3) to restore the bellows (4) to the compressed state.

2. The dynamic adjustment device for coal mine paste filling pipeline according to claim 1, characterized in that: The recovery assembly includes a connecting plate (7) connected to the end of the regulating cylinder (2) away from the bypass pipe (1), a guide rod (8) vertically connected to the connecting plate (7), and a spring (9) sleeved on the guide rod (8). The slider (5) has a through hole for the guide rod (8) to pass through. One end of the spring (9) is connected to the slider (5), and the other end is connected to the end of the guide rod (8).

3. The dynamic adjustment device for coal mine paste filling pipeline according to claim 1, characterized in that: The recovery assembly includes a connecting plate (7) connected to the end of the regulating cylinder (2) away from the bypass pipe (1), a piston cylinder (10) vertically connected to the connecting plate (7), and a piston (11) installed in the piston cylinder (10). The piston (11) is connected to the slider (5) through a piston shaft (12).

4. The dynamic adjustment device for coal mine paste filling pipeline according to any one of claims 1-3, characterized in that: The regulating cylinder (2) and the bypass pipe (1) are connected by a flange structure.

5. The dynamic adjustment device for coal mine paste filling pipeline according to any one of claims 1-3, characterized in that: The side wall of the slide plate (3) is equipped with a plurality of universal balls (13) evenly distributed along its axis, and the spheres of the universal balls (13) are in contact with the inner wall of the adjusting cylinder (2).

6. The dynamic adjustment device for coal mine paste filling pipeline according to any one of claims 1-3, characterized in that: At least two microswitches (14) are provided on one side of the slide (6) and along its length. When the slider (5) passes the position of the microswitch (14), it can trigger the microswitch (14) to emit an electrical signal.

Images