Two-way conveying anti-blocking device for coal mine underground concrete backfilling

Abstract

The utility model discloses a kind of coal mine underground concrete backfill two-way conveying anti-blocking devices, applied in mixing equipment technical field, including plunger pump, the two sides front side and rear side of plunger pump top are all communicated with conveying pipe, the side of conveying pipe away from plunger pump is provided with plug block, the inside of plug block extends to the inside of conveying pipe, the surface of plug block is fixedly connected with fixed mechanism;The fixed mechanism includes mounting plate, and the surface of mounting plate is fixedly connected on the surface of plug block, the setting of the utility model passes conveying pipe, the two-way synchronous conveying of concrete is realized, compared with traditional one-way conveying device, can be simultaneously docked two places backfill operation surface underground, substantially reduce conveying path switching time, especially suitable for large area, coal mine underground backfill scene of multiple areas, effectively improve overall construction efficiency;While two-way conveying structure can balance the stress of plunger pump, reduce one-side pipeline pressure overload risk, prolong equipment service life.

Description

Technical Field

[0001] This utility model belongs to the field of concrete equipment technology, and specifically relates to a bidirectional conveying and anti-blocking device for underground concrete backfilling in coal mines. Background Technology

[0002] After underground mining operations in coal mines, concrete backfilling is necessary to fill the goaf to ensure the stability of the underground geological structure and prevent surface subsidence. During concrete backfilling, the conveying device is the core equipment, and its operational stability directly affects the backfilling quality and construction efficiency. Currently, underground concrete conveying in coal mines mostly uses plunger pumps as the power source, coupled with single or multiple conveying pipes to achieve slurry transportation. Sealing and protecting the ends of the conveying pipes is a crucial aspect of ensuring the normal operation of the equipment. When the equipment is shut down, during single-path conveying, or for maintenance, idle pipelines must be sealed with sealing components to prevent backflow, leakage, or impurities from entering the pipeline and causing blockages. However, existing underground concrete conveying pipe sealing components in coal mines mostly use bolt fastening and flange connection as fixing methods. The underground working space is narrow and dimly lit, and the workers need to carry a variety of tools. The disassembly and assembly process of bolt-fastened sealing components requires repeatedly tightening multiple bolts. The operation steps are cumbersome, time-consuming and labor-intensive. Especially when it is necessary to frequently switch conveying pipelines or carry out emergency maintenance, the excessive disassembly and assembly time will cause backfilling operations to be interrupted, which will significantly reduce construction efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a bidirectional conveying anti-blocking device for underground concrete backfilling in coal mines. Its advantages are that no tools are required and no large operating space is needed. Even in a small space, the disassembly and assembly work can be completed by hand.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a bidirectional conveying anti-blocking device for concrete backfilling in coal mines, including a plunger pump, with conveying pipes connected to the front and rear sides of the top of the plunger pump, a plug block provided on the side of the conveying pipe away from the plunger pump, the inner side of the plug block extending into the interior of the conveying pipe, and a fixing mechanism fixedly connected to the surface of the plug block. The fixing mechanism includes a mounting plate, the surface of which is fixedly connected to the surface of the plug block.

[0005] The above technical solution enables bidirectional synchronous conveying of concrete through the installation of conveying pipes. Compared with traditional unidirectional conveying devices, it can simultaneously connect to two backfilling faces underground, significantly reducing the time for switching conveying paths. It is especially suitable for large-area, multi-regional underground backfilling scenarios in coal mines, effectively improving overall construction efficiency. At the same time, the bidirectional conveying structure can balance the force on the plunger pump, reduce the risk of pressure overload on one side of the pipeline, and extend the service life of the equipment.

[0006] The present invention is further configured such that the fixing mechanism includes a gear, the gear being movably connected inside the mounting plate, the top and bottom of the mounting plate being meshed with toothed plates, and a locking block being fixedly connected to the outer side of the toothed plates, the surface of the locking block being in contact with the surface of the conveying pipe.

[0007] The above technical solution utilizes a locking block design. Compared to traditional bolt fixing, this design provides a more uniform locking force, effectively resisting the impact of complex working conditions such as downhole vibration and impact on the fixing structure, and preventing the plug from loosening and causing sealing failure. At the same time, the gear and toothed plate transmission design eliminates the need for complex tools during installation and removal. The locking block can be extended and retracted simply by driving the gear, significantly shortening the installation and removal time of the plug and improving the convenience of pipeline switching and maintenance.

[0008] The present invention is further configured such that a worm gear is fixedly connected to the outer side of the gear, a worm is meshed with the right side of the worm gear, and the worm is movably connected to the surface of the mounting plate.

[0009] The above technical solution utilizes the self-locking characteristics of worm gear transmission by setting up worm wheels and worms. Without the need for additional locking structures, it can effectively prevent the toothed plate and the locking block from shifting due to external forces, ensuring the long-term stability of the plug block's fixed state and preventing loosening of the locking mechanism due to vibration or collision during downhole operations. At the same time, the worm gear transmission has a large reduction ratio, which can convert a small driving force into a large locking force, making operation more labor-saving and suitable for the limited operating space and physical conditions of downhole workers.

[0010] The present invention is further configured such that a knob is fixedly connected to the bottom of the worm gear, and the knob is located at the bottom of the mounting plate.

[0011] The above technical solution allows operators to easily control the extension and retraction of the locking block by manually rotating the knob, without the need for specialized tools. This is suitable for the dimly lit, cramped, and inconvenient working environment in coal mines. The knob is located at the bottom of the mounting plate, and its ergonomic design makes it easy for operators to bend over or turn to the side, reducing physical fatigue during operation. It is especially suitable for long-term, high-frequency pipeline switching operations, reducing labor intensity.

[0012] The present invention is further configured such that a friction groove is formed on the surface of the knob, and the friction groove is located at the bottom of the mounting plate.

[0013] The above technical solution is adopted as follows: By setting the friction groove, the friction between the hand and the knob is increased, which effectively prevents the operator from slipping due to concrete slurry, oil stains or the damp environment underground. This ensures stable force application during rotation and prevents hand injuries or operational errors caused by improper force application. At the same time, the texture design of the friction groove can play a role in anti-slip and drainage, ensuring the reliability of operation even under harsh working conditions and further improving the safety of the device.

[0014] The present invention is further configured such that a stabilizing plate is sleeved on the top of the worm gear surface, and the surface of the stabilizing plate is fixedly connected to the surface of the mounting plate.

[0015] The above technical solution employs a stabilizing plate to radially limit and support the worm gear, effectively preventing it from shifting or swaying due to uneven force during transmission. This ensures that the worm wheel and worm gear maintain precise meshing, avoiding accelerated tooth wear or transmission jamming. The fixed connection design of the stabilizing plate enhances the installation rigidity of the worm gear, reduces the impact of downhole vibration on the transmission structure, decreases the failure rate of transmission components, and extends the overall service life of the fixing mechanism.

[0016] The present invention is further configured such that a stabilizing element is sleeved on the surface of the worm gear, and the surface of the stabilizing element is fixedly connected to the surface of the mounting plate.

[0017] The above technical solution effectively limits the radial runout of the worm wheel during rotation by setting the stabilizer, ensuring uniform meshing clearance between the worm wheel and the worm, and avoiding a decrease in transmission efficiency or local wear on the tooth surface due to meshing misalignment. The fixing structure of the stabilizer can disperse the axial force borne by the worm wheel, reduce the load on the worm wheel shaft, reduce component fatigue damage, and improve the smoothness of the transmission process, making the extension and retraction of the clamping block more stable and precise, further ensuring the fixing effect of the plug block.

[0018] The present invention is further configured such that a slide bar is provided inside the toothed plate, and the surface of the slide bar is fixedly connected to the inner wall of the mounting plate.

[0019] The above technical solution utilizes a sliding strip to create a precise guiding structure. As the toothed plate moves up and down with the gear transmission, the sliding strip effectively restricts the movement trajectory of the toothed plate, preventing it from shifting or tilting, which could lead to misalignment or jamming with the gear, thus ensuring smooth and stable transmission. Simultaneously, the sliding contact between the sliding strip and the toothed plate reduces frictional resistance, decreases component wear, and extends the service life of the toothed plate and gear. Furthermore, the guiding structure allows for more precise extension and retraction of the locking block, improving the sealing and reliability of the plug block's fixation.

[0020] In summary, this utility model has the following beneficial effects: 1. The present invention enables bidirectional synchronous conveying of concrete through the conveying pipe. Compared with the traditional unidirectional conveying device, it can simultaneously connect to two backfilling faces underground, greatly reducing the conveying path switching time. It is especially suitable for large-area, multi-regional underground backfilling scenarios in coal mines, effectively improving the overall construction efficiency. At the same time, the bidirectional conveying structure can balance the force on the plunger pump, reduce the risk of pressure overload on one side of the pipeline, and extend the service life of the equipment. 2. By setting the plug, this utility model can effectively seal the idle pipeline when the equipment is stopped or when single-line delivery is used, preventing the backflow, leakage or impurities from entering the pipeline and causing blockage. The detachable design of the plug also makes it convenient to clean and maintain the inside of the delivery pipe, enhances the anti-blocking effect, and ensures the long-term stable operation of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is the utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a perspective view of the mounting plate of this utility model; Figure 4 This is a perspective view of the gear of this utility model.

[0022] Reference numerals: 1. Piston pump; 2. Delivery pipe; 3. Plug block; 4. Fixing mechanism; 41. Mounting plate; 42. Gear; 43. Tooth plate; 44. Locking block; 45. Worm gear; 46. Worm; 47. Knob; 5. Friction groove; 6. Stabilizing plate; 7. Stabilizing component; 8. Slide bar. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings. Example

[0024] refer to Figure 1 A bidirectional conveying anti-blocking device for concrete backfilling in coal mines includes a plunger pump 1. Both sides of the top of the plunger pump 1 are connected to conveying pipes 2. A plug block 3 is provided on the side of the conveying pipe 2 away from the plunger pump 1. The inner side of the plug block 3 extends into the interior of the conveying pipe 2. A fixing mechanism 4 is fixedly connected to the surface of the plug block 3. The fixing mechanism 4 includes a mounting plate 41, the surface of which is fixedly connected to the surface of the plug block 3.

[0025] refer to Figure 4The fixing mechanism 4 also includes a gear 42, which is movably connected inside the mounting plate 41. The top and bottom of the mounting plate 41 are both meshed with toothed plates 43. A locking block 44 is fixedly connected to the outside of the toothed plates 43. The surface of the locking block 44 is in contact with the surface of the delivery pipe 2. Through the setting of the worm gear 45 and worm 46, the self-locking characteristics of the worm gear 45 and worm 46 transmission can effectively prevent the toothed plates 43 and locking blocks 44 from displacing due to external forces without the need for an additional locking structure. This ensures the long-term stability of the fixed state of the plug block 3 and avoids loosening of the locking due to vibration and collision during downhole operations. At the same time, the worm gear 45 and worm 46 transmission has a large reduction ratio, which can convert a small driving force into a large clamping force, making operation more labor-saving and suitable for the limited operating space and physical conditions of downhole workers.

[0026] refer to Figure 3 A worm gear 45 is fixedly connected to the outer side of the gear 42, and a worm 46 meshes with the right side of the worm gear 45. The worm 46 is movably connected to the surface of the mounting plate 41. With the setting of the knob 47, the operator can easily control the extension and retraction of the locking block 44 by manually rotating the knob 47 without the need for professional tools. This is suitable for the working environment in coal mines where the light is dim, the space is narrow, and the tools are inconvenient to carry. The knob 47 is located at the bottom of the mounting plate 41 and its position is ergonomically designed, making it easy for the operator to bend over or turn to the side to operate, reducing physical fatigue during operation. It is especially suitable for long-term, high-frequency pipeline switching operations, reducing labor intensity.

[0027] refer to Figure 3 A knob 47 is fixedly connected to the bottom of the worm gear 46. The knob 47 is located at the bottom of the mounting plate 41. The friction groove 5 increases the friction between the hand and the knob 47, effectively preventing the operator from slipping due to concrete slurry, oil, or the damp environment underground. This ensures stable force application during rotation and prevents hand injuries or operational errors caused by improper force application. At the same time, the texture design of the friction groove 5 can play a role in anti-slip and drainage, ensuring the reliability of operation even under harsh working conditions and further improving the safety of the device.

[0028] refer to Figure 3 The knob 47 has a friction groove 5 on its surface, which is located at the bottom of the mounting plate 41. The stabilizing plate 6 provides radial limiting and support for the worm 46, effectively preventing the worm 46 from shifting or swaying due to uneven force during transmission. This ensures that the worm wheel 45 and the worm 46 always maintain precise meshing, avoiding increased tooth wear or transmission jamming. The fixed connection design of the stabilizing plate 6 enhances the installation rigidity of the worm 46, reduces the impact of downhole vibration on the transmission structure, reduces the failure rate of transmission components, and extends the overall service life of the fixing mechanism 4.

[0029] Brief description of the usage process: When it is necessary to remove the plug block 3 from the end of the conveying pipe 2, turn the knob 47 to rotate. The knob 47 drives the worm gear 46 to rotate and the worm wheel 45 to rotate. The worm wheel 45 drives the worm gear 46 to rotate and the gear 42 to rotate. The gear 42 drives the toothed plate 43 to move to both sides. The toothed plate 43 drives the locking block 44 to move to both sides. When the locking block 44 separates from the conveying pipe 2, the conveying pipe 2 and the plug block 3 lose their fixing effect. Move the plug block 3 to the side away from the conveying pipe 2. The separation of the plug block 3 from the conveying pipe 2 is completed. Example

[0030] refer to Figure 3 A stabilizing plate 6 is fitted onto the top of the worm gear 46. The surface of the stabilizing plate 6 is fixedly connected to the surface of the mounting plate 41. The stabilizing plate 6 provides radial limiting and support for the worm gear 46, effectively preventing the worm gear 46 from shifting or swaying due to uneven force during transmission. This ensures that the worm wheel 45 and the worm gear 46 always maintain precise meshing, avoiding accelerated tooth wear or transmission jamming. The fixed connection design of the stabilizing plate 6 enhances the installation rigidity of the worm gear 46, reduces the impact of downhole vibration on the transmission structure, reduces the failure rate of transmission components, and extends the overall service life of the fixing mechanism 4.

[0031] refer to Figure 3 A stabilizing element 7 is fitted onto the surface of the worm gear 45. The surface of the stabilizing element 7 is fixedly connected to the surface of the mounting plate 41. The stabilizing element 7 effectively limits the radial runout of the worm gear 45 during rotation, ensuring a uniform meshing clearance between the worm gear 45 and the worm 46, and preventing a decrease in transmission efficiency or local wear of the tooth surface due to meshing misalignment. The fixing structure of the stabilizing element 7 can disperse the axial force borne by the worm gear 45, reduce the load on the worm gear 45 shaft, reduce component fatigue damage, and improve the smoothness of the transmission process, making the extension and retraction of the locking block 44 more stable and precise, further ensuring the fixing effect of the plug block 3.

[0032] refer to Figure 4 The toothed plate 43 is equipped with a slide bar 8 inside. The surface of the slide bar 8 is fixedly connected to the inner wall of the mounting plate 41. The slide bar 8 forms a precise guiding structure. When the toothed plate 43 moves up and down with the gear 42, the slide bar 8 can effectively limit the movement trajectory of the toothed plate 43, preventing the toothed plate 43 from deviating or tilting, which would cause misalignment or jamming with the gear 42, and ensuring smooth and stable transmission. At the same time, the sliding cooperation between the slide bar 8 and the toothed plate 43 reduces the frictional resistance between them, reduces component wear, and extends the service life of the toothed plate 43 and the gear 42. Moreover, the guiding structure can make the extension and retraction of the locking block 44 more precise, and improve the sealing and reliability of the plug block 3.

[0033] Brief description of usage: The friction groove 5 can increase the anti-slip effect of the knob 47, making the transmission effect more stable when the user turns the knob 47. The stabilizing component 7 can prevent the worm gear 45 from loosening during rotation, making the meshing effect between the gear 42 and the toothed plate 43 tighter. The slide bar 8 can guide the toothed plate 43 and also play a limiting role, improving the efficiency of the movement of the toothed plate 43.

[0034] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0035] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A bidirectional conveying and anti-blocking device for underground concrete backfilling in coal mines, comprising a plunger pump (1), characterized in that: The plunger pump (1) has a delivery pipe (2) connected to both the front and rear sides of its top. A plug (3) is provided on the side of the delivery pipe (2) away from the plunger pump (1). The inner side of the plug (3) extends into the interior of the delivery pipe (2). A fixing mechanism (4) is fixedly connected to the surface of the plug (3). The fixing mechanism (4) includes a mounting plate (41), the surface of which is fixedly connected to the surface of the plug block (3).

2. The anti-blocking device for bidirectional conveying of underground concrete backfilling in coal mines according to claim 1, characterized in that: The fixing mechanism (4) also includes a gear (42), which is movably connected inside the mounting plate (41). The top and bottom of the mounting plate (41) are both meshed with toothed plates (43). A locking block (44) is fixedly connected to the outside of the toothed plate (43). The surface of the locking block (44) is in contact with the surface of the conveying pipe (2).

3. The anti-blocking device for bidirectional conveying of underground concrete backfilling in coal mines according to claim 2, characterized in that: A worm gear (45) is fixedly connected to the outside of the gear (42), and a worm (46) is meshed on the right side of the worm gear (45). The worm (46) is movably connected to the surface of the mounting plate (41).

4. The anti-blocking device for bidirectional conveying of underground concrete backfilling in coal mines according to claim 3, characterized in that: A knob (47) is fixedly connected to the bottom of the worm (46), and the knob (47) is located at the bottom of the mounting plate (41).

5. The anti-blocking device for bidirectional conveying of underground concrete backfilling in coal mines according to claim 4, characterized in that: The knob (47) has a friction groove (5) on its surface, and the friction groove (5) is located at the bottom of the mounting plate (41).

6. The anti-blocking device for bidirectional conveying of underground concrete backfilling in coal mines according to claim 3, characterized in that: A stabilizing plate (6) is fitted on the top of the surface of the worm (46), and the surface of the stabilizing plate (6) is fixedly connected to the surface of the mounting plate (41).

7. The anti-blocking device for bidirectional conveying of underground concrete backfilling in coal mines according to claim 3, characterized in that: The surface of the worm gear (45) is fitted with a stabilizing element (7), and the surface of the stabilizing element (7) is fixedly connected to the surface of the mounting plate (41).

8. The anti-blocking device for bidirectional conveying of underground concrete backfilling in coal mines according to claim 2, characterized in that: The toothed plate (43) is provided with a slide bar (8) inside, and the surface of the slide bar (8) is fixedly connected to the inner wall of the mounting plate (41).

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