Underground filling pipeline pressure relief buffer device

Abstract

The invention relates to the technical field of underground filling, in particular to a pressure relief buffer device for an underground filling pipeline, which is characterized in that the lower part of the filling pipeline is vertically communicated with one end of a transverse pipe, the other end of the transverse pipe is provided with a switch valve, the middle part of the transverse pipe is upwards communicated with a slurry discharge tank through a middle pipe, and a liftable sliding pipe is arranged in the slurry discharge tank; the sliding pipe slides up and down in the slurry discharging tank to change the distance between the sliding pipe and the middle pipe, and then slurry of different layers in the slurry discharging tank is mixed. According to the underground filling pipeline pressure relief buffer device, key problems existing in the prior art are solved, the overall performance of a system is improved through innovative design, and a more efficient, safer and more reliable solution is provided for underground filling engineering.

Description

Technical Field

[0001] The invention relates to the technical field of downhole filling, and in particular to a downhole filling pipeline pressure relief buffer device. Background Art

[0002] During underground filling, the slurry is prepared by the ground mixing station, reaches the underground through the filling pipeline, and is buffered in the underground sedimentation tank. The slurry in the sedimentation tank is then pumped into the agitator by a pump. After stirring, the slurry can be transported to the required location underground. The underground sedimentation tank, also known as the slurry discharge tank, is used to temporarily store the slurry for subsequent filling.

[0003] The existing methods have the following problems: The distance from the ground to the well is as long as several hundred meters. The slurry flows from the ground to the well very quickly and has a great impact. This will cause a lot of pressure in the slurry discharge pool, resulting in damage to the slurry discharge pool or equipment. The slurry in the sedimentation tank may be pumped unevenly. Only the slurry near the pump may be pumped away, but other parts may be stratified or consolidated at the bottom. If the slurry stays in the sedimentation tank for a long time, stratification will occur, and the slurry pumped into the agitator may be too thin or too thick, which does not meet the actual needs. The method of setting up the slurry discharge pool and the agitator separately takes up a lot of space.

[0004] To this end, the present application designs a downhole filling pipeline pressure relief buffer device to solve the above-mentioned problems. Summary of the invention

[0005] In order to make up for the deficiencies in the prior art, the present invention provides a downhole filling pipeline pressure relief buffer device.

[0006] A downhole filling pipeline pressure relief buffer device comprises a filling pipeline connected to a grouting pipeline, and is characterized in that: The lower part of the filling pipeline is vertically connected to one end of a horizontal pipe, and the other end of the horizontal pipe is provided with a switch valve. The middle part of the horizontal pipe is connected upward through an intermediate pipe to a slurry discharge tank. A liftable sliding pipe is provided in the slurry discharge tank. The sliding pipe changes its distance from the intermediate pipe by sliding up and down in the slurry discharge tank, thereby mixing different layers of slurry in the slurry discharge tank.

[0007] Furthermore, in order to better implement the present invention, one end of the transverse tube is fixedly connected to a power motor, a driving rod rotatably connected to the power motor extends into the transverse tube, and a stirring rod is provided at the end of the driving rod.

[0008] Furthermore, in order to better realize the present invention, the middle pipe penetrates to the bottom center of the slurry discharge tank, a lower slit is opened at a position of the middle pipe close to the bottom of the slurry discharge tank, and a sliding pipe slides above the middle pipe.

[0009] Furthermore, in order to better implement the present invention, a buffer cover is provided on the top of the slurry discharge tank, a downwardly recessed guide cone is provided at the center of the buffer cover, a material level sensor is provided on the buffer cover, and a baffle is provided between the material level sensor and the guide cone.

[0010] Furthermore, in order to better realize the present invention, a sliding rod that slides up and down is inserted in the center of the buffer cover of the slurry discharge tank, and a connecting plate is connected to the top of the sliding rod. The connecting plate is connected to one end of the telescopic cylinder, and the other end of the telescopic cylinder is fixed on the buffer cover. Slide the tube.

[0011] The beneficial effects of the present invention are: 1. The present invention provides a guide cone and a sliding pipe structure. When the slurry enters the slurry discharge tank, its impact force is dispersed by the guide cone and flows along the arc transition area, thereby reducing the direct impact on the bottom and side walls of the slurry discharge tank. In addition, the design of the slits under the sliding pipe and the intermediate pipe allows the slurry to flow in from multiple paths, reducing the slurry spraying pressure at the single position and effectively protecting the equipment.

[0012] 2. The present invention is designed with a lower slit, so that when filling is not required, the bottom slurry can be carried upward and mixed with the upper slurry. At the same time, during the discharge process, the stirring rod further mixes the slurry to ensure that the slurry in the entire slurry discharge tank remains uniform and consistent, avoiding the problems of stratification and bottom consolidation.

[0013] 3. Through the above-mentioned mixing mechanism (including the functions of the lower slit and the stirring rod), the present invention can continuously and fully mix the slurries at different levels, ensuring that the output slurry concentration is always within an ideal range to meet the construction requirements.

[0014] 4. The present invention integrates the slurry discharge function and the preliminary stirring function in one slurry discharge tank, thereby reducing the additional space requirement and improving the space utilization rate, and is particularly suitable for limited space conditions underground.

[0015] 5. The present invention is equipped with a material level sensor and a telescopic cylinder, which realizes the automatic adjustment of the position of the sliding pipe, so that the system can automatically optimize the operating state according to the actual working conditions, reduce the need for manual intervention, and improve the reliability of the system and the safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 A top view of the slurry discharge tank of the present invention; Figure 3 A bottom view of the buffer cover of the present invention after it is opened; Figure 4is a side view of the present invention; Figure 5 For the present invention Figure 4 AA section view.

[0017] In the figure, 1. Filling pipeline, 2. Horizontal pipe, 3. Slurry discharge tank, 4. Middle pipe, 5. Buffer cover, 6. Sliding pipe, 7. Sliding rod, 8. Connecting plate, 9. Telescopic cylinder, 201. Switch valve, 202. Power motor, 203. Driving rod, 204. Stirring rod, 401. Lower slit, 501. Guide cone, 502. Material level sensor, 503. Shielding plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0020] Figure 1-Figure 5 A specific embodiment of the present invention is a downhole filling pipeline pressure relief buffer device.

[0021] During operation, the grouting pipeline of the ground grouting station is connected to the filling pipeline, and the slurry enters the horizontal pipe through the filling pipeline. When filling work is not needed, the switch valve is closed. At this time, the slurry enters the middle pipe and is sent upward. When the slurry moves upward, the slurry movement carries the slurry in the slurry discharge tank at the bottom of the lower slit and moves upward. The slurry at the bottom hinders the upward movement trend of the slurry, thereby slowing down the slurry and sending the precipitated slurry at the bottom upward to reduce the degree of stratification in the slurry discharge tank. The slurry in the middle pipe continues to move upward along the middle pipe, and the slurry mixed with the bottom slurry is sent upward and flows to the upper layer in the slurry discharge tank, thereby achieving the mixing of the upper and lower slurries in the slurry discharge tank and increasing the degree of mixing.

[0022] When it is necessary to discharge the material for grouting, the switch valve is opened, and the slurry is sucked from the middle pipe under the action of the external grouting pump. When the grouting operation is carried out, the slurry in the slurry discharge tank is used first. At this time, the external valve for sending slurry to the filling pipeline is closed, and then when the slurry moves downward from the middle pipe, part of the slurry moves downward through the lower slit, and the other part of the slurry moves downward through the upper end of the sliding pipe at the upper end of the middle pipe, and then the slurry in the upper part of the slurry tank and the slurry at the bottom of the slurry tank are mixed, and then discharged outward after mixing. At this time, the power motor works synchronously to drive the drive rod to rotate. The rotation of the drive rod drives the stirring rod to stir the mixed slurry in the horizontal pipe to further mix it and then discharge it.

[0023] During this process, the material level sensor detects the material level signal in the slurry discharge tank and drives the connecting plate to move through the telescopic cylinder. The movement of the connecting plate drives the movement of the sliding rod, and the movement of the sliding rod drives the movement of the sliding tube, so that the upper end of the sliding tube corresponds to the liquid level of the slurry and is located below the liquid level of the slurry, so that the upper layer of slurry enters the upper part.

[0024] When grouting is being carried out while grouting the slurry tank, the switch valve is opened, and most of the slurry is directly grouting the well through the horizontal pipe. When grouting stops in the well, the switch valve is closed. When slurry is added to the slurry tank, and when there is no pre-stored slurry in the slurry tank, part of the slurry flows out through the lower slit, reducing the pressure of part of the slurry, and the other part flows out through the upper end of the sliding pipe. When the pressure of the outflowing slurry is too high, the slurry impacts the guide cone. Under the action of the guide cone, the slurry is guided along the arc surface of the buffer rod to form an arc movement, and then falls back into the slurry tank, thereby reducing the local impact force of the slurry on the slurry tank.

[0025] The downhole filling pipeline pressure relief buffer device of this embodiment provides the following targeted solutions and beneficial effects for existing problems: Reduce impact force and protect equipment: Problem: In the prior art, the distance from the ground to the well is long, the slurry flow rate is fast and the impact is large, resulting in a high pressure in the slurry drainage pool, which can easily cause damage to the slurry drainage pool or related equipment.

[0026] Solution and effect: The present invention provides a guide cone and a sliding pipe structure. When the slurry enters the slurry discharge tank, its impact force is dispersed by the guide cone and flows along the arc transition area, thereby reducing the direct impact on the bottom and side walls of the slurry discharge tank. In addition, the design of the slits under the sliding pipe and the intermediate pipe allows the slurry to flow in from multiple paths, reducing the slurry spraying pressure at the single position and effectively protecting the equipment.

[0027] Prevents delamination and consolidation: Problem: The slurry in the sedimentation tank may not be pumped evenly, and other areas may be stratified or consolidated at the bottom.

[0028] Solution and effect: The present invention is designed with a lower slit, so that when filling is not required, the bottom slurry can be carried upward and mixed with the upper slurry. At the same time, during the discharge process, the stirring rod further mixes the slurry to ensure that the slurry in the entire slurry discharge tank remains uniform and consistent, avoiding the problems of stratification and bottom consolidation.

[0029] Ensure the appropriate slurry concentration: Problem: If the slurry is stored in the sedimentation tank for a long time, stratification will occur, and the slurry pumped into the agitator may be too thin or too thick, which does not meet the actual needs.

[0030] Solution and effect: Through the above-mentioned mixing mechanism (including the functions of the lower slit and the stirring rod), the present invention can continuously and fully mix the slurries at different levels, ensuring that the output slurry concentration is always within an ideal range to meet the construction requirements.

[0031] Save space: Problem: The existing technology uses a method of separately setting up the slurry discharge tank and the mixing tank, which takes up a large space.

[0032] Solution and effect: The present invention integrates the slurry discharge function and the preliminary stirring function in one slurry discharge tank, which reduces the additional space requirement and improves the space utilization, and is particularly suitable for limited space conditions underground.

[0033] High degree of automation: Question: Considering the complex underground working environment, equipment with a high degree of automation is more conducive to improving work efficiency and safety.

[0034] Solution and effect: The present invention is equipped with a material level sensor and a telescopic cylinder, which realizes the automatic adjustment of the sliding tube position, so that the system can automatically optimize the operating state according to the actual working conditions, reduces the need for manual intervention, and improves the reliability of the system and the safety of operation.

[0035] In summary, the downhole filling pipeline pressure relief buffer device provided by the present invention not only solves the key problems existing in the prior art, but also improves the overall performance of the system through innovative design, providing a more efficient, safe and reliable solution for downhole filling projects.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A downhole filling pipeline pressure relief buffer device, comprising a filling pipeline (1) connected to a grouting pipeline, characterized in that: The lower part of the filling pipeline (1) is vertically connected to one end of the horizontal pipe (2), and the other end of the horizontal pipe (2) is provided with a switch valve (201). The middle part of the horizontal pipe (2) is upwardly connected to a slurry discharge tank (3) through an intermediate pipe (4). A liftable sliding pipe (6) is provided in the slurry discharge tank (3). The sliding pipe (6) changes the distance between the sliding pipe and the intermediate pipe (4) by sliding up and down in the slurry discharge tank (3), thereby mixing slurry in different layers in the slurry discharge tank (3).

2. The downhole filling pipeline pressure relief buffer device according to claim 1 is characterized in that: One end of the transverse tube (2) is fixedly connected to a power motor (202); a driving rod (203) rotatably connected to the power motor (202) extends into the transverse tube (2); and a stirring rod (204) is provided at the end of the driving rod (203).

3. The downhole filling pipeline pressure relief buffer device according to claim 1 is characterized in that: The intermediate pipe (4) passes through the bottom center of the slurry discharge tank (3), a lower slit (401) is provided at a position of the intermediate pipe (4) close to the bottom of the slurry discharge tank (3), and a sliding pipe (6) is slidably disposed above the intermediate pipe (4).

4. The downhole filling pipeline pressure relief buffer device according to claim 3 is characterized in that: A buffer cover (5) is provided on the top of the slurry discharge tank (3); a downwardly recessed flow guide cone (501) is provided at the center of the buffer cover (5); a material level sensor (502) is provided on the buffer cover (5); and a shielding plate (503) is provided between the material level sensor (502) and the flow guide cone (501).

5. The downhole filling pipeline pressure relief buffer device according to claim 4 is characterized in that: A sliding rod (7) that slides up and down is inserted in the center of the buffer cover (5) of the slurry discharge tank (3), and a connecting plate (8) is connected to the top of the sliding rod (7). The connecting plate (8) is connected to one end of a telescopic cylinder (9), and the other end of the telescopic cylinder (9) is fixed on the buffer cover (5). The end of the sliding rod (7) that extends into the slurry discharge tank (3) is connected to a sliding pipe (6).

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