Mine filling paste conveying system

Abstract

The utility model discloses a mine filling paste conveying system which comprises a stirring machine, a feeding pump and a diaphragm pump, a discharging pipeline of the stirring machine is connected to a feeding port of the feeding pump, and a discharging pipeline of the feeding pump is connected to the diaphragm pump. A discharging pipeline of the feeding pump is provided with an upper one-way check valve and a lower one-way check valve, a T-shaped three-way pipe is connected between the two one-way check valves, a middle connecting pipe of the T-shaped three-way pipe connects the containing pipeline to a diaphragm chamber outlet of the diaphragm pump, and the two one-way check valves serve as a one-way feeding valve and a one-way discharging valve of the containing pipeline respectively. And an outlet of the one-way discharge valve is connected with a filling pipeline. Through the matching of the feeding pump and the diaphragm pump, filling paste is sucked into the material containing pipeline and then is extruded and sent out, the filling paste does not enter the diaphragm chamber of the diaphragm pump and is clean water all the time, and the situation that slurry is solidified in a non-flowing area is avoided. The increase of the concentration of the filling paste does not affect the diaphragm, the use reliability is improved, the service life is prolonged, and meanwhile, the adaptability of the diaphragm pump to large particles is indirectly enhanced.

Description

Technical Field

[0001] The utility model belongs to the field of gob filling in mines, and specifically relates to a conveying system for mine filling paste. Background Technique

[0002] At present, the commonly used filling and conveying pumps on the market are generally transformed from traditional concrete conveying pumps. Since the particles of the filling slurry are generally finer and the fluidity is stronger than that of concrete, the conveying pumps with traditional S-valve structures are prone to backflow and water hammer effects. Therefore, for high-pressure and long-distance working conditions, conveying pumps with cone-valve structures are generally used. However, such pumps have more hydraulic execution components, relatively complex structures, high failure rates and low efficiency. Secondly, the sealing structure of the cone valve uses metal hard sealing. To ensure the sealing effect and durability, high-hardness alloy materials are required, and the mating surfaces need to be finely processed. Therefore, the initial investment of the pump and the replacement cost of vulnerable parts are very high. In addition, although the water hammer effect of the cone-valve structure is smaller than that of the S-valve, there is still a large impact, resulting in a shortened service life of the conveying pipeline and joints.

[0003] In the mining field, diaphragm pumps are a widely used slurry conveying pump.

[0004] However, when traditional diaphragm pumps are used, the slurry enters from the top and exits from the bottom in the diaphragm chamber, and the slurry is conveyed through the suction and discharge strokes of the diaphragm chamber. The paste slurry has a high concentration and large particles. If it enters the diaphragm chamber, the slurry will solidify in the non-flowing area of the diaphragm chamber, affecting the service life of the diaphragm. Therefore, traditional diaphragm pumps can only be used to convey filling slurry with finer particles and cannot be used to convey filling paste. Content of the Utility Model

[0005] The purpose of the utility model is to provide a conveying system that can be used for filling paste slurry and has a long service life.

[0006] The conveying system for mine filling slurry provided by the utility model includes a mixer, a feeding pump and a diaphragm pump. The discharge pipeline of the mixer is connected to the inlet of the feeding pump, and the discharge pipeline of the feeding pump is connected to the diaphragm pump. Two one-way check valves are arranged on the discharge pipeline of the feeding pump. A T-shaped three-way pipe is connected between the two one-way check valves. The middle pipe of the T-shaped three-way pipe is connected to a material-containing pipeline to the outlet of the diaphragm chamber of the diaphragm pump. The two one-way check valves respectively serve as the one-way inlet valve and one-way outlet valve of the material-containing pipeline, and the outlet of the one-way outlet valve is connected to the filling pipeline.

[0007] When the above system is implemented, the feeding pump is a slurry pump, the flow rate is greater than the flow rate of the diaphragm pump, and the head is between 20-40m.

[0008] When the above system is implemented, the discharge pipeline of the feeding pump further includes a feeding pipe, which includes a vertical pipe, a 90° elbow, a horizontal pipe, a 90° elbow, and a docking flange connected in sequence.

[0009] When the above system is implemented, docking flanges are symmetrically arranged at the upper and lower ends of the T-shaped tee.

[0010] When the above system is implemented, a docking flange is arranged at the upper end of the filling pipeline.

[0011] When the above system is implemented, the volume of the material-containing pipe is greater than the volume of the suction stroke of the diaphragm chamber of the diaphragm pump, so as to ensure that the filling paste fills the intermediate connecting pipe without entering the diaphragm chamber.

[0012] When the above system is implemented, the one-way check valve includes a housing, a valve seat, a guiding claw, a valve core, and a base; the housing is a cylindrical structure with docking flanges connected to the upper and lower ends respectively; the valve seat with an axial hole is embedded in the top of the inner cavity of the housing, and the bottom of the inner wall of the valve seat is a flared mouth that expands outwards; the guiding claw with an axial central hole is slidably connected to the axial hole of the valve seat; the valve core includes a central shaft, a frustum, an upper support seat, a lower support seat, and a spring. The top of the central shaft is connected with the frustum and the upper support seat in sequence from top to bottom. The upper end of the central shaft is inserted into the axial central hole of the guiding claw, and the lower part is inserted into the lower support seat. The lower part of the spring is sleeved outside the lower support seat, and the upper end abuts against the bottom surface of the upper support seat; the base is fixed to the bottom of the inner cavity of the housing, and the lower support seat of the valve core is connected to the base through a fastener.

[0013] When the above system is implemented, the outer wall of the frustum matches the flared mouth of the valve seat.

[0014] When the above system is implemented, a sealing ring made of rubber is embedded between the outer side of the top of the upper support seat and the bottom surface of the frustum, and the outer wall of the top of the sealing ring is located on the extension line of the outer wall of the frustum.

[0015] Through the cooperation of the feeding pump and the diaphragm pump in the present invention, after the filling paste is sucked into the material-containing pipeline, it is then squeezed and sent out. The filling paste does not enter the diaphragm chamber of the diaphragm pump, and it is always clear water, so that the situation of slurry solidification in the non-flowing area will not occur. The increase in the concentration of the filling paste will not affect the diaphragm, the use reliability is increased and the service life is extended, and at the same time, the adaptability of the diaphragm pump to large particles is indirectly enhanced. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the equipment layout of an embodiment of the present invention.

[0017] Figure 2 It is Figure 1 The enlarged schematic diagram of part A in

[0018] Figure 3 It isFigure 2 Amplified structural schematic diagram of the one-way check valve. Specific implementation mode

[0019] Combined Figures 1 to 3 As shown, the mine filling slurry conveying system disclosed in this embodiment includes a vertical mixer 1, a feeding pump 2, a diaphragm pump 3, an electric gate valve 4, a feeding pipe 5, a one-way check valve 6, a T-shaped tee 7, a filling pipe 8, and a material-containing pipe 9.

[0020] After the high-concentration tailings and cement are stirred evenly in the vertical mixer 1, sand is discharged from the bottom sand discharge port and connected to the inlet of the feeding pump 2 through a pipeline. An electric gate valve 4 is arranged on the pipeline to control the opening and closing of sand discharge.

[0021] The feeding pump 2 is a slurry pump with a slightly larger flow rate than the diaphragm pump 3, and the head is generally between 20m and 40m. The feeding pipe 5 of the slurry pump 2 first goes upward, then horizontally, and then downward. The end of the downward elbow is connected to a necked butt weld flange 10.

[0022] The one-way check valve 6 includes a housing 61, a valve seat 62, a base 63, and a valve core.

[0023] The housing 61 is a cylindrical structure with butt flanges connected to the upper and lower ends respectively.

[0024] The valve seat 62 with an axial hole is embedded in the top of the inner cavity of the housing. The bottom of the inner wall of the valve seat is an outward-expanded flared mouth.

[0025] The base 63 is arranged at the bottom of the inner cavity of the housing 61.

[0026] The valve core includes a central shaft 64, a guiding claw 65, a frustum 66, an upper support seat 67, a lower support seat 68, and a spring 69. The top of the central shaft 64 is sequentially connected with the guiding claw 65, the frustum 66, and the upper support seat 67 from top to bottom. The upper end of the central shaft 64 is inserted into the axial central hole of the guiding claw 65, and the lower part is inserted into the lower support seat 68. The lower part of the spring 69 is sleeved outside the lower support seat 68, and the upper end abuts against the bottom surface of the upper support seat 67.

[0027] The outer wall of the frustum 66 matches the flared mouth of the valve seat 62.

[0028] A sealing ring MFQ made of rubber is embedded between the outer side of the top of the upper support seat 67 and the bottom surface of the frustum 66. The outer wall of the top of the sealing ring is located on the extension line of the outer wall of the frustum.

[0029] When the valve core is assembled, there is a clearance fit between the outer wall of the guiding claw 63 and the vertical section of the inner wall of the axial hole of the valve seat 62, a clearance fit between the outer wall of the frustum and the wall surface of the flared mouth of the axial hole of the valve seat, and an interference fit between the outer wall of the sealing ring and the wall surface of the flared mouth, that is, the sealing ring is in a compressed state. The spring is in a free state, and the lower support seat and the base are fixedly connected by bolts / screws.

[0030] The setting of the sealing ring MFQ makes the seal between the valve core and the valve seat a soft seal, which can ensure the sealing effect, can be replaced after long-term use, and has a low replacement cost.

[0031] The opposite interface ends of the T-shaped tee 7 are symmetrically connected with the necked butt welding flanges 10.

[0032] There are two one-way check valves. The outlet end of one one-way check valve is connected to one end of the opposite interface of the T-shaped tee 7, and the inlet end of the other one-way check valve is connected to the other end of the opposite interface of the T-shaped tee.

[0033] The upper end of the filling pipe 8 is connected with the necked butt welding flange 10.

[0034] The two ends of the assembly of the one-way check valve 6 and the T-shaped tee 7 are respectively connected and fixed to the necked butt welding flange 10 of the feeding pipe 5 and the necked butt welding flange 10 at the upper end of the filling pipe 8 through bolts and nuts. The middle connecting pipe of the T-shaped tee accommodates the material pipeline 9. The material pipeline 9 is horizontally connected to the lower end outlet of the diaphragm chamber of the diaphragm pump, and the volume of the material pipeline is slightly larger than the volume of the suction stroke of the diaphragm chamber to ensure that when the diaphragm chamber is in the suction stroke, the filling paste fills the material pipeline but does not enter the diaphragm chamber.

[0035] The working process of this system is as follows:

[0036] 1. The mixer stirs the filling paste, and the diaphragm chamber of the diaphragm pump is filled with clear water.

[0037] 2. The diaphragm pump enters the suction stroke. The diaphragm retreats to increase the volume of the diaphragm chamber, reducing the pressure in the diaphragm cavity and the material pipeline to a negative pressure state. The valve core of the one-way feeding valve moves downward to open, and the feeding pump works. The filling paste enters and fills the material pipeline under the pumping pressure through the feeding pipe and the one-way feeding valve.

[0038] 3. The diaphragm pump enters the pressure feeding stroke. The diaphragm presses forward to reduce the volume of the diaphragm chamber and increase the pressure. When the pressure in the diaphragm chamber is greater than the feeding pressure of the diaphragm pump, the valve core of the one-way feeding valve moves in the reverse direction under the pressure of the filling paste and the spring reset, closing the one-way feeding valve. While the one-way discharging valve opens under the pressure of the filling paste, allowing the filling paste to flow out through the outlet of the one-way discharging valve for filling through the filling pipeline.

[0039] The diaphragm pump circulates through the suction and pressure feeding strokes to continuously transport the filling paste sent by the feeding pump.

[0040] This conveying system has the following advantages:

[0041] Through the cooperation of the feeding pump and the diaphragm pump, after the filling paste is sucked into the material-containing pipeline, it is then extruded and sent out. The diaphragm chamber of the diaphragm pump does not enter the filling paste and is always clear water, so the situation of slurry solidification in the non-flowing area will not occur.

[0042] The increase in the concentration of the filling paste will not affect the diaphragm, and the use reliability is increased.

[0043] The one-way check valves are all of the straight-through structure form with upward inlet and downward outlet, solving the problem of large particle deposition and greatly enhancing the adaptability of the diaphragm pump to large particles.

Claims

1. A mine filling paste conveying system, comprising a mixer, a feeding pump and a diaphragm pump, wherein the discharge pipeline of the mixer is connected to the feed inlet of the feeding pump, and the discharge pipeline of the feeding pump is connected to the diaphragm pump, characterized in that: The discharge pipeline of the feeding pump is provided with two upper and lower one-way check valves, a T-shaped three-way pipe is connected between the two one-way check valves, the middle pipe of the T-shaped three-way pipe connects the material containing pipeline to the diaphragm chamber outlet of the diaphragm pump, the two one-way check valves serve as the one-way feed valve and the one-way discharge valve of the material containing pipeline respectively, and the outlet of the one-way discharge valve is connected to the filling pipeline.

2. The mine filling paste conveying system according to claim 1, characterized in that: The feeding pump is a slurry pump, the flow rate is greater than the diaphragm pump flow rate, and the head is between 20-40m.

3. The mine filling paste conveying system according to claim 1, characterized in that: The discharge pipeline of the feeding pump also includes a feeding pipe, which includes a vertical pipe, a 90° elbow, a horizontal pipe, a 90° elbow and a docking flange connected in sequence.

4. The mine filling paste conveying system according to claim 1, characterized in that: The upper and lower ends of the T-shaped tee are symmetrically provided with docking flanges.

5. The mine filling paste conveying system according to claim 1, characterized in that: The upper end of the filling pipe is provided with a docking flange.

6. The mine filling paste conveying system according to claim 4, characterized in that: The volume of the material containing pipeline is greater than the volume of the diaphragm chamber suction stroke of the diaphragm pump to ensure that the filling slurry fills the intermediate pipe without entering the diaphragm chamber.

7. The mine filling paste conveying system according to claim 1, characterized in that: The one-way check valve comprises a housing, a valve seat, a guide claw, a valve core and a base; The shell is a cylindrical structure with docking flanges connected to the upper and lower ends respectively; A valve seat with an axial hole is embedded in the top of the inner cavity of the shell, and the bottom of the inner wall of the valve seat is an outward-expanding bell mouth; A guide claw with an axial center hole can be slidably connected to the axial hole of the valve seat; The valve core includes a central shaft, a truncated cone, an upper support seat, a lower support seat and a spring. The top of the central shaft is connected to the truncated cone and the upper support seat in sequence from top to bottom. The upper end of the central shaft is inserted into the axial center hole of the guide claw, and the lower part is inserted into the lower support seat. The lower part of the spring is sleeved outside the lower support seat, and the upper end is pressed against the bottom surface of the upper support seat. The base is fixed to the bottom of the inner cavity of the shell, and the lower support seat of the valve core is connected to the base through a fastener.

8. The mine filling paste conveying system according to claim 7, characterized in that: The outer wall of the frustum matches the bell mouth of the valve seat.

9. The mine filling paste conveying system according to claim 8, characterized in that: A sealing ring made of rubber material is embedded between the outer side of the top of the upper support seat and the bottom surface of the truncated cone, and the top outer wall of the sealing ring is located on the extension line of the outer wall of the truncated cone.

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