Mine paste filling upward conveying industrial pump and control method

Abstract

The invention discloses a mine paste filling upward conveying industrial pump and a control method. The mine paste filling upward conveying industrial pump comprises a main oil pump, an oil tank, an auxiliary oil pump, a six-position eight-way valve, a first oil cylinder, a first oil cylinder piston, a first piston rod, a water tank, a first concrete cylinder, a first concrete cylinder piston, a valve A, a feeding box, a valve B, a first mixing chamber, a converging chamber, a second mixing chamber, a valve C, a valve D, a second concrete cylinder piston, a second concrete cylinder and a second piston rod. And a second oil cylinder piston and a second oil cylinder. The problems that an existing upward pipeline pumping system is poor in working condition adaptability, large in pipeline impact, high in cost, unsmooth in working condition and the like are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of mine paste filling, and in particular relates to an industrial pump for upward transportation of mine paste filling and a control method. Background Art

[0002] The paste filling in mines usually adopts a double concrete cylinder parallel plunger pump. The double concrete cylinder pistons synchronously extend and retract in the opposite direction, and the paste in the concrete cylinder is alternately pushed into the pump port pipeline by the piston. On the one hand, the double cylinder oil circuit is connected in series, and the pump port output flow is zero when the paste is pushed alternately. Therefore, in the process of switching from zero flow to the acceleration section, there is a push impact pressure, which leads to large impact vibration of the filling pipeline; on the other hand, in the process of conveying the paste in the upward pipeline, the double concrete cylinders are switched, causing the paste in the filling pipeline to lose the pushing power, and the paste in the upward pipeline is accelerated to flow back, resulting in a water hammer effect, which aggravates the instability of the pipeline and affects the smooth filling condition. The traditional process adopts the addition of accumulators or single-cylinder pumps to supplement the pressure and flow in the filling pipeline. It has poor adaptability to the working conditions with changing filling capacity, and the coordination and control of multiple pumps are difficult and costly. The water hammer impact phenomenon of upward pumping paste needs to be solved urgently. Summary of the invention

[0003] The present invention aims to overcome the deficiencies of the prior art and provides an industrial pump and method for upward transportation of mine paste filling.

[0004] In order to achieve the above object, the technical solution provided by the present invention is:

[0005] The industrial pump for upward transportation of mining paste filling comprises a main oil pump (1), an oil tank (2), an auxiliary oil pump (3), a six-position eight-way valve (4), a first oil cylinder (5), a water tank (8), a first concrete cylinder (9), a first feed box (12), a first mixing chamber (14), a confluence chamber (15), a second mixing chamber (6), a second feed box (24), a second concrete cylinder (20), and a second oil cylinder (23); one end of the first oil cylinder (5) is closed and the other end is connected to the water tank (8); one end of the first concrete cylinder (9) is connected to the water tank (8) and the other end is connected to the first mixing chamber (12). The first mixing chamber (14) is connected to the direct feed end of the mixing chamber (14), the direct discharge end of the first mixing chamber (14) is connected to the confluence chamber (15) through the B valve (13), and the bypass feed end of the first mixing chamber (14) is connected to the first feed box (12) through the A valve (11); one end of the second oil cylinder (23) is closed and the other end is connected to the water tank (8), one end of the second concrete cylinder (20) is connected to the water tank (8) and the other end is connected to the direct feed end of the second mixing chamber (16), and the direct discharge end of the second mixing chamber (16) is connected to the confluence chamber (15) through the C valve (17). The first mixing chamber (16) is connected to the mixing chamber (15); the bypass feed end of the second mixing chamber (16) is connected to the second feed box (24) through a D valve (18); the first oil cylinder (5) is provided with a first oil cylinder piston (6); the first concrete cylinder (9) is provided with a first concrete cylinder piston (10); the first oil cylinder piston (6) is connected to the first concrete cylinder piston (10) through a first piston rod (7); the second oil cylinder (23) is provided with a second oil cylinder piston (22); the second concrete cylinder (20) is provided with a second concrete cylinder piston (19); the second oil cylinder piston (22 ) is connected to the second concrete cylinder piston (19) through a second piston rod (21); the oil outlet of the oil tank (2) is respectively connected to the oil inlet of the main oil pump (1) and the oil inlet of the auxiliary oil pump (3), and the oil outlets of the main oil pump (1) and the auxiliary oil pump (3) are connected to the oil inlet of the six-position eight-way valve (4); the six-position eight-way valve (4) is provided with two pairs of oil outlets, one pair of oil outlets is respectively connected to the two ends of the first oil cylinder (5), and the other pair of oil outlets is respectively connected to the two ends of the second oil cylinder (23); the oil return port of the six-position eight-way valve (4) is connected to the oil inlet of the oil cylinder (2).

[0006] Preferably, the six-position eight-way valve (4) is provided with a first oil inlet, a second oil inlet, a first oil return port and a second oil return port; the oil outlet of the main oil pump (1) is connected to the first oil inlet of the six-position eight-way valve (4), the oil outlet of the auxiliary oil pump (3) is connected to the second oil inlet of the six-position eight-way valve (4), and the first oil return port and the second oil return port of the six-position eight-way valve (4) are both connected to the oil cylinder (2).

[0007] Preferably, the inner diameter and stroke length of the first oil cylinder (5) and the second oil cylinder (23) are of the same size; the inner diameter and stroke length of the first concrete cylinder (9) and the second concrete cylinder (20) are of the same size.

[0008] Preferably, the valve cores of the A valve (11), the B valve (13), the C valve (17), and the D valve (18) are frustoconical valve cores or conical valve cores.

[0009] Preferably, the A valve (11), the B valve (13), the C valve (17), and the D valve (18) are hydraulically driven valves or electrically driven valves.

[0010] Preferably, the six-position eight-way valve (4) is an integrated synchronous valve core, comprising two parallel straight-through positions, two reversing straight-through positions, and two opening and closing positions.

[0011] The present invention also provides a method for controlling upward transportation of mining paste filling based on the above-mentioned mining paste filling upward transportation industrial pump, which specifically includes the following steps:

[0012] (1) Control the piston of the first concrete cylinder to start the uniform speed pushing stage and the piston of the second concrete cylinder to start the accelerated suction stage:

[0013] Control valves B and D to be in the open state, valves A and C to be in the closed state, and the six-position eight-way valve to be in two reversing straight-through positions;

[0014] The hydraulic oil output by the main oil pump enters the rodless chamber of the first oil cylinder through the six-position eight-way valve, pushing the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to advance synchronously and uniformly. During the uniform advancement of the first concrete cylinder piston, the hydraulic oil in the rod chamber of the first oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the rodless chamber of the first concrete cylinder enters the confluence chamber through the mixing chamber and the B valve and is then pushed out at a uniform speed;

[0015] The auxiliary oil pump outputs hydraulic oil into the rod chamber of the second oil cylinder through the six-position eight-way valve, pushing the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to synchronously accelerate the retraction. During the accelerated retraction of the second concrete cylinder piston, the hydraulic oil in the rodless chamber of the second oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the second feed box is sucked into the rodless chamber of the second concrete cylinder through the D valve and the second mixing chamber;

[0016] Before the piston of the first concrete cylinder finishes pushing the material at a uniform speed, the piston of the second concrete cylinder completes the material suction process of the second concrete cylinder;

[0017] (2) Control the piston of the first concrete cylinder to start the uniform deceleration pushing stage, and the piston of the second concrete cylinder to start the uniform acceleration pushing stage:

[0018] Control valves B and C to be in the open state, valves A and D to be in the closed state, and the six-position eight-way valve to be in two open and closed positions;

[0019] The hydraulic oil output by the main oil pump enters the rodless chamber of the first oil cylinder and the rodless chamber of the second oil cylinder through the six-position eight-way valve, respectively, to push the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to be synchronously and uniformly decelerated and advanced, and push the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to be synchronously and uniformly accelerated and advanced. The hydraulic oil of the rod chambers of the first oil cylinder and the second oil cylinder are respectively returned to the oil tank through the six-position eight-way valve. The materials in the rodless chamber of the first concrete cylinder are decelerated and pushed out after entering the confluence chamber through the first mixing chamber and the B valve. The materials in the rodless chamber of the second concrete cylinder are uniformly accelerated and pushed out after entering the confluence chamber through the second mixing chamber and the C valve.

[0020] There is no hydraulic oil output from the auxiliary oil pump;

[0021] When the piston of the first concrete cylinder finishes pushing materials at a uniform deceleration rate, the piston of the second concrete cylinder synchronously finishes pushing materials at a uniform acceleration rate and enters pushing materials at a uniform speed;

[0022] (3) Control the piston of the first concrete cylinder to start the accelerated material suction stage, and the piston of the second concrete cylinder to start the uniform speed material pushing stage:

[0023] Control valves A and C to be in the open state, valves B and D to be in the closed state, and the six-position eight-way valve to be in two parallel straight-through positions;

[0024] The hydraulic oil output by the main oil pump enters the rodless chamber of the second oil cylinder through the six-position eight-way valve, pushing the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to advance synchronously and uniformly. During the uniform advancement of the second concrete cylinder piston, the hydraulic oil in the rod chamber of the second oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the rodless chamber of the second concrete cylinder enters the confluence chamber through the second mixing chamber and the C valve and is then pushed out at a uniform speed.

[0025] The auxiliary oil pump outputs hydraulic oil into the rod chamber of the first oil cylinder through the six-position eight-way valve, pushing the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to synchronously accelerate and retract. During the accelerated retraction of the first concrete cylinder piston, the hydraulic oil in the rodless chamber of the first oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the first feed box is sucked into the rodless chamber of the first concrete cylinder through the A valve and the first mixing chamber;

[0026] Before the second concrete cylinder piston finishes pushing the material at a uniform speed, the first concrete cylinder piston completes the material suction process of the first concrete cylinder;

[0027] (4) Control the piston of the first concrete cylinder to start entering the uniform acceleration pushing stage, and the piston of the second concrete cylinder to start entering the uniform deceleration pushing stage:

[0028] Control valves B and C to be in the open state, valves A and D to be in the closed state, and the six-position eight-way valve to be in two open and closed positions;

[0029] The hydraulic oil output by the main oil pump enters the rodless chamber of the first oil cylinder and the rodless chamber of the second oil cylinder respectively through the six-position eight-way valve, pushing the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to accelerate synchronously and uniformly, and pushing the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to decelerate synchronously and uniformly. The hydraulic oil of the rod chambers of the first oil cylinder and the second oil cylinder returns to the oil tank respectively through the six-position eight-way valve. The materials in the rodless chamber of the first concrete cylinder are accelerated and pushed out after entering the confluence chamber through the first mixing chamber and the B valve. The materials in the rodless chamber of the second concrete cylinder are decelerated and pushed out after entering the confluence chamber through the second mixing chamber and the C valve.

[0030] There is no hydraulic oil output from the auxiliary oil pump;

[0031] When the second concrete cylinder piston finishes pushing materials at a uniform deceleration rate, the first concrete cylinder piston synchronously ends pushing materials at a uniform acceleration rate and enters pushing materials at a uniform speed;

[0032] (5) Repeat steps (1) to (4) in a loop.

[0033] Preferably, the switching time of the main oil pump and the auxiliary oil pump and the pumping pressure of the main oil pump and the auxiliary oil pump satisfy the following relationship:

[0034]

[0035] Where, t—commutation time, s;

[0036] F-pump outlet pumping pressure, N

[0037] d-inner diameter of upward pipeline, m;

[0038] L-upward pipeline length, m;

[0039] ρ-paste slurry density, kg / m 3

[0040] g-gravitational acceleration, m / s 2

[0041] v 0 -Flow velocity in the pipeline before switching, m / s;

[0042] θ-upward slope of pipeline;

[0043] v t -Instantaneous flow velocity in the upward pipeline, m / s;

[0044] f(v t ,d,ρ)-the flow velocity in the upward pipeline is v t The flow resistance function corresponding to , N.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. The present invention sets up a separate auxiliary oil pump to supply oil to realize fast advance suction. The suction of one concrete cylinder is completed during the uniform speed pushing stage of the other concrete cylinder. On the one hand, the pushing speed zero point of one concrete cylinder coincides with the uniform speed point of the other concrete cylinder, which fundamentally eliminates the appearance of the combined speed zero point of the acceleration and deceleration series system and solves the source problem of water hammer impact in the upward pipeline. On the other hand, the uniform deceleration of one concrete cylinder coincides with the uniform acceleration of the other concrete cylinder, and the combined speed of the system is stable and unchanged, which solves the double cylinder switching impact problem.

[0047] 2 The present invention is provided with a confluence chamber, which can realize the simultaneous pushing of materials by a single pump and two cylinders. Compared with the alternating replacement of materials by two pumps, the number of industrial pumps for conveying under the single-pipeline filling condition is reduced, the filling station equipment occupies a small area, and the system equipment investment is greatly reduced.

[0048] 3. The present invention is provided with a six-position eight-way valve. On the one hand, the integrated synchronous valve core fundamentally eliminates the error problem of dual-valve synchronous control, greatly reduces the impact of synchronous control accuracy on the high-pressure oil circuit, and has high system reliability; on the other hand, compared with the traditional method of adding an accumulator, it has strong adaptability to changes in the system pumping flow rate.

[0049] In summary, the present invention overcomes the problems of poor adaptability to working conditions, large pipeline impact, high cost, and unsmooth working conditions of the existing upward pipeline pumping system. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the structure of the present invention;

[0051] Figure 2 This is a schematic diagram of the initial state of step 1 of the present invention;

[0052] Figure 3 This is a schematic diagram of the initial state of step 2 of the present invention;

[0053] Figure 4 This is a schematic diagram of the initial state of step three of the present invention;

[0054] Figure 5 It is a schematic diagram of the initial state of step 4 of the present invention.

[0055] In the figure: 1. main oil pump; 2. oil tank; 3. auxiliary oil pump; 4. six-position eight-way valve; 5. first oil cylinder; 6. first oil cylinder piston; 7. first piston rod; 8. water tank; 9. first concrete cylinder; 10. first concrete cylinder piston; 11. A valve; 12. first feed box; 13. B valve; 14. confluence chamber; 15. confluence chamber; 16. second mixing chamber; 17. C valve; 18. D valve; 19. second concrete cylinder piston; 20. second concrete cylinder; 21. second piston rod; 22. second oil cylinder piston; 23. second oil cylinder; 24. second feed box. DETAILED DESCRIPTION

[0056] Example 1

[0057] See also Figures 1 to 5 The mining paste filling upward conveying industrial pump includes a main oil pump 1, an oil tank 2, an auxiliary oil pump 3, a six-position eight-way valve 4, a first oil cylinder 5, a water tank 8, a first concrete cylinder 9, a first feed box 12, a first mixing chamber 14, a confluence chamber 15, a second mixing chamber 6, a second feed box 24, a second concrete cylinder 20, and a second oil cylinder 23; one end of the first oil cylinder 5 is closed and the other end is connected to the water tank 8, one end of the first concrete cylinder 9 is connected to the water tank 8 and the other end is connected to the first mixing chamber 14. The first mixing chamber 14 is connected to the feed end through the B valve 13, the direct discharge end of the first mixing chamber 14 is connected to the confluence chamber 15, and the bypass feed end of the first mixing chamber 14 is connected to the first feed box 12 through the A valve 11; one end of the second oil cylinder 23 is closed and the other end is connected to the water tank 8, one end of the second concrete cylinder 20 is connected to the water tank 8, and the other end is connected to the direct feed end of the second mixing chamber 16, and the direct discharge end of the second mixing chamber 16 is connected to the confluence chamber 15 through the C valve 17. 15 is connected, and the bypass feed end of the second mixing chamber 16 is connected to the second feed box 24 through the D valve 18; the first oil cylinder 5 is provided with a first oil cylinder piston 6, the first concrete cylinder 9 is provided with a first concrete cylinder piston 10, and the first oil cylinder piston 6 is connected to the first concrete cylinder piston 10 through the first piston rod 7; the second oil cylinder 23 is provided with a second oil cylinder piston 22, the second concrete cylinder 20 is provided with a second concrete cylinder piston 19, and the second oil cylinder piston 22 is connected to the second concrete cylinder piston 19 through the second piston rod 21; the oil outlet of the oil tank 2 is respectively connected to the oil inlet of the main oil pump 1 and the oil inlet of the auxiliary oil pump 3, and the oil outlets of the main oil pump 1 and the auxiliary oil pump 3 are connected to the oil inlet of the six-position eight-way valve 4; the six-position eight-way valve 4 is provided with two pairs of oil outlets, one pair of oil outlets is respectively connected to the two ends of the first oil cylinder 5, and the other pair of oil outlets is respectively connected to the two ends of the second oil cylinder 23; the oil return port of the six-position eight-way valve 4 is connected to the oil inlet of the oil cylinder 2.

[0058] The six-position eight-way valve 4 is provided with a first oil inlet, a second oil inlet, a first oil return port and a second oil return port; the oil outlet of the main oil pump 1 is connected to the first oil inlet of the six-position eight-way valve 4, the oil outlet of the auxiliary oil pump 3 is connected to the second oil inlet of the six-position eight-way valve 4, and the first oil return port and the second oil return port of the six-position eight-way valve 4 are both connected to the oil cylinder 2. The inner diameter and stroke length of the first oil cylinder 5 and the second oil cylinder 23 are of the same size; the inner diameter and stroke length of the first concrete cylinder 9 and the second concrete cylinder 20 are of the same size. The valve cores of the A valve 11, the B valve 13, the C valve 17 and the D valve 18 are frustoconical valve cores or conical valve cores. The A valve 11, the B valve 13, the C valve 17 and the D valve 18 are hydraulically driven valves or electrically driven valves. The six-position eight-way valve 4 is an integrated synchronous valve core, including two parallel straight-through positions, two reversing straight-through positions and two split positions.

[0059] Example 2

[0060] The method for controlling upward transportation of a mine paste filling by an industrial pump for upward transportation of a mine paste filling based on Example 1 comprises the following steps:

[0061] (1) Control the piston of the first concrete cylinder to start the uniform speed pushing stage and the piston of the second concrete cylinder to start the accelerated suction stage:

[0062] Control valves B and D to be in the open state, valves A and C to be in the closed state, and the six-position eight-way valve to be in two reversing straight-through positions;

[0063] The hydraulic oil output by the main oil pump enters the rodless chamber of the first oil cylinder through the six-position eight-way valve, pushing the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to advance synchronously and uniformly. During the uniform advancement of the first concrete cylinder piston, the hydraulic oil in the rod chamber of the first oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the rodless chamber of the first concrete cylinder enters the confluence chamber through the mixing chamber and the B valve and is then pushed out at a uniform speed;

[0064] The auxiliary oil pump outputs hydraulic oil into the rod chamber of the second oil cylinder through the six-position eight-way valve, pushing the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to synchronously accelerate the retraction. During the accelerated retraction of the second concrete cylinder piston, the hydraulic oil in the rodless chamber of the second oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the second feed box is sucked into the rodless chamber of the second concrete cylinder through the D valve and the second mixing chamber;

[0065] Before the piston of the first concrete cylinder finishes pushing the material at a uniform speed, the piston of the second concrete cylinder completes the material suction process of the second concrete cylinder;

[0066] (2) Control the piston of the first concrete cylinder to start the uniform deceleration pushing stage, and the piston of the second concrete cylinder to start the uniform acceleration pushing stage:

[0067] Control valves B and C to be in the open state, valves A and D to be in the closed state, and the six-position eight-way valve to be in two open and closed positions;

[0068] The hydraulic oil output by the main oil pump enters the rodless chamber of the first oil cylinder and the rodless chamber of the second oil cylinder through the six-position eight-way valve, respectively, to push the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to be synchronously and uniformly decelerated and advanced, and push the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to be synchronously and uniformly accelerated and advanced. The hydraulic oil of the rod chambers of the first oil cylinder and the second oil cylinder are respectively returned to the oil tank through the six-position eight-way valve. The materials in the rodless chamber of the first concrete cylinder are decelerated and pushed out after entering the confluence chamber through the first mixing chamber and the B valve. The materials in the rodless chamber of the second concrete cylinder are uniformly accelerated and pushed out after entering the confluence chamber through the second mixing chamber and the C valve.

[0069] There is no hydraulic oil output from the auxiliary oil pump;

[0070] When the piston of the first concrete cylinder finishes pushing materials at a uniform deceleration rate, the piston of the second concrete cylinder synchronously finishes pushing materials at a uniform acceleration rate and enters pushing materials at a uniform speed;

[0071] (3) Control the piston of the first concrete cylinder to start the accelerated material suction stage, and the piston of the second concrete cylinder to start the uniform speed material pushing stage:

[0072] Control valves A and C to be in the open state, valves B and D to be in the closed state, and the six-position eight-way valve to be in two parallel straight-through positions;

[0073] The hydraulic oil output by the main oil pump enters the rodless chamber of the second oil cylinder through the six-position eight-way valve, pushing the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to advance synchronously and uniformly. During the uniform advancement of the second concrete cylinder piston, the hydraulic oil in the rod chamber of the second oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the rodless chamber of the second concrete cylinder enters the confluence chamber through the second mixing chamber and the C valve and is then pushed out at a uniform speed.

[0074] The auxiliary oil pump outputs hydraulic oil into the rod chamber of the first oil cylinder through the six-position eight-way valve, pushing the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to synchronously accelerate and retract. During the accelerated retraction of the first concrete cylinder piston, the hydraulic oil in the rodless chamber of the first oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the first feed box is sucked into the rodless chamber of the first concrete cylinder through the A valve and the first mixing chamber;

[0075] Before the second concrete cylinder piston finishes pushing the material at a uniform speed, the first concrete cylinder piston completes the material suction process of the first concrete cylinder;

[0076] (4) Control the piston of the first concrete cylinder to start entering the uniform acceleration pushing stage, and the piston of the second concrete cylinder to start entering the uniform deceleration pushing stage:

[0077] Control valves B and C to be in the open state, valves A and D to be in the closed state, and the six-position eight-way valve to be in two open and closed positions;

[0078] The hydraulic oil output by the main oil pump enters the rodless chamber of the first oil cylinder and the rodless chamber of the second oil cylinder respectively through the six-position eight-way valve, pushing the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to accelerate synchronously and uniformly, and pushing the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to decelerate synchronously and uniformly. The hydraulic oil of the rod chambers of the first oil cylinder and the second oil cylinder returns to the oil tank respectively through the six-position eight-way valve. The materials in the rodless chamber of the first concrete cylinder are accelerated and pushed out after entering the confluence chamber through the first mixing chamber and the B valve. The materials in the rodless chamber of the second concrete cylinder are decelerated and pushed out after entering the confluence chamber through the second mixing chamber and the C valve.

[0079] There is no hydraulic oil output from the auxiliary oil pump;

[0080] When the second concrete cylinder piston finishes pushing materials at a uniform deceleration rate, the first concrete cylinder piston synchronously ends pushing materials at a uniform acceleration rate and enters pushing materials at a uniform speed;

[0081] (5) Repeat steps (1) to (4) in a loop.

[0082] The switching time of the main oil pump and the auxiliary oil pump and the pumping pressure of the main oil pump and the auxiliary oil pump satisfy the following relationship:

[0083]

[0084] Where, t—commutation time, s;

[0085] F-pump outlet pumping pressure, N

[0086] d-inner diameter of upward pipeline, m;

[0087] L-upward pipeline length, m;

[0088] ρ-paste slurry density, kg / m 3

[0089] g-gravitational acceleration, m / s 2

[0090] v 0 -Flow velocity in the pipeline before switching, m / s;

[0091] θ-upward slope of pipeline;

[0092] v t -Instantaneous flow velocity in the upward pipeline, m / s;

[0093] f(v t ,d,ρ)-the flow velocity in the upward pipeline is v t The flow resistance function corresponding to , N.

Claims

1. An industrial pump for upward transportation of mining paste filling, characterized in that: The industrial pump for upward transportation of mining paste filling comprises a main oil pump (1), an oil tank (2), an auxiliary oil pump (3), a six-position eight-way valve (4), a first oil cylinder (5), a water tank (8), a first concrete cylinder (9), a first feed box (12), a first mixing chamber (14), a confluence chamber (15), a second mixing chamber (6), a second feed box (24), a second concrete cylinder (20), and a second oil cylinder (23); one end of the first oil cylinder (5) is closed and the other end is connected to the water tank (8); one end of the first concrete cylinder (9) is connected to the water tank (8) and the other end is connected to the first mixing chamber (12). The first mixing chamber (14) is connected to the direct feed end of the mixing chamber (14), the direct discharge end of the first mixing chamber (14) is connected to the confluence chamber (15) through the B valve (13), and the bypass feed end of the first mixing chamber (14) is connected to the first feed box (12) through the A valve (11); one end of the second oil cylinder (23) is closed and the other end is connected to the water tank (8), one end of the second concrete cylinder (20) is connected to the water tank (8) and the other end is connected to the direct feed end of the second mixing chamber (16), and the direct discharge end of the second mixing chamber (16) is connected to the confluence chamber (15) through the C valve (17). The first mixing chamber (16) is connected to the mixing chamber (15); the bypass feed end of the second mixing chamber (16) is connected to the second feed box (24) through a D valve (18); the first oil cylinder (5) is provided with a first oil cylinder piston (6); the first concrete cylinder (9) is provided with a first concrete cylinder piston (10); the first oil cylinder piston (6) is connected to the first concrete cylinder piston (10) through a first piston rod (7); the second oil cylinder (23) is provided with a second oil cylinder piston (22); the second concrete cylinder (20) is provided with a second concrete cylinder piston (19); the second oil cylinder piston (22 ) is connected to the second concrete cylinder piston (19) through a second piston rod (21); the oil outlet of the oil tank (2) is respectively connected to the oil inlet of the main oil pump (1) and the oil inlet of the auxiliary oil pump (3), and the oil outlets of the main oil pump (1) and the auxiliary oil pump (3) are connected to the oil inlet of the six-position eight-way valve (4); the six-position eight-way valve (4) is provided with two pairs of oil outlets, one pair of oil outlets is respectively connected to the two ends of the first oil cylinder (5), and the other pair of oil outlets is respectively connected to the two ends of the second oil cylinder (23); the oil return port of the six-position eight-way valve (4) is connected to the oil inlet of the oil cylinder (2).

2. The mining paste filling upward conveying industrial pump according to claim 1, characterized in that: The six-position eight-way valve (4) is provided with a first oil inlet, a second oil inlet, a first oil return port and a second oil return port; the oil outlet of the main oil pump (1) is connected to the first oil inlet of the six-position eight-way valve (4), the oil outlet of the auxiliary oil pump (3) is connected to the second oil inlet of the six-position eight-way valve (4), and the first oil return port and the second oil return port of the six-position eight-way valve (4) are both connected to the oil cylinder (2).

3. The mining paste filling upward conveying industrial pump according to claim 1, characterized in that: The inner diameter and stroke length of the first oil cylinder (5) and the second oil cylinder (23) are of the same size; the inner diameter and stroke length of the first concrete cylinder (9) and the second concrete cylinder (20) are of the same size.

4. The mining paste filling upward conveying industrial pump according to claim 1, characterized in that: The valve cores of the A valve (11), the B valve (13), the C valve (17), and the D valve (18) are frustoconical valve cores or conical valve cores.

5. The mining paste filling upward conveying industrial pump according to claim 1, characterized in that: The A valve (11), the B valve (13), the C valve (17), and the D valve (18) are hydraulically driven valves or electrically driven valves.

6. The mining paste filling upward conveying industrial pump according to claim 2, characterized in that: The six-position eight-way valve (4) is an integrated synchronous valve core, comprising two parallel straight-through positions, two reversing straight-through positions, and two opening and closing positions.

7. A method for controlling upward transportation of a mine paste filling based on the mine paste filling upward transportation industrial pump according to any one of claims 1 to 6, characterized in that: The mine paste filling upward conveying control method comprises the following steps: (1) Control the piston of the first concrete cylinder to start the uniform speed pushing stage and the piston of the second concrete cylinder to start the accelerated suction stage: Control valves B and D to be in the open state, valves A and C to be in the closed state, and the six-position eight-way valve to be in two reversing straight-through positions; The hydraulic oil output by the main oil pump enters the rodless chamber of the first oil cylinder through the six-position eight-way valve, pushing the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to advance synchronously and uniformly. During the uniform advancement of the first concrete cylinder piston, the hydraulic oil in the rod chamber of the first oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the rodless chamber of the first concrete cylinder enters the confluence chamber through the mixing chamber and the B valve and is then pushed out at a uniform speed; The auxiliary oil pump outputs hydraulic oil into the rod chamber of the second oil cylinder through the six-position eight-way valve, pushing the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to synchronously accelerate the retraction. During the accelerated retraction of the second concrete cylinder piston, the hydraulic oil in the rodless chamber of the second oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the second feed box is sucked into the rodless chamber of the second concrete cylinder through the D valve and the second mixing chamber; Before the piston of the first concrete cylinder finishes pushing the material at a uniform speed, the piston of the second concrete cylinder completes the material suction process of the second concrete cylinder; (2) Control the piston of the first concrete cylinder to start the uniform deceleration pushing stage, and the piston of the second concrete cylinder to start the uniform acceleration pushing stage: Control valves B and C to be in the open state, valves A and D to be in the closed state, and the six-position eight-way valve to be in two open and closed positions; The hydraulic oil output by the main oil pump enters the rodless chamber of the first oil cylinder and the rodless chamber of the second oil cylinder through the six-position eight-way valve, respectively, to push the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to be synchronously and uniformly decelerated and advanced, and push the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to be synchronously and uniformly accelerated and advanced. The hydraulic oil of the rod chambers of the first oil cylinder and the second oil cylinder are respectively returned to the oil tank through the six-position eight-way valve. The materials in the rodless chamber of the first concrete cylinder are decelerated and pushed out after entering the confluence chamber through the first mixing chamber and the B valve. The materials in the rodless chamber of the second concrete cylinder are uniformly accelerated and pushed out after entering the confluence chamber through the second mixing chamber and the C valve. There is no hydraulic oil output from the auxiliary oil pump; When the piston of the first concrete cylinder finishes pushing materials at a uniform deceleration rate, the piston of the second concrete cylinder synchronously finishes pushing materials at a uniform acceleration rate and enters pushing materials at a uniform speed; (3) Control the piston of the first concrete cylinder to start the accelerated material suction stage, and the piston of the second concrete cylinder to start the uniform speed material pushing stage: Control valves A and C to be in the open state, valves B and D to be in the closed state, and the six-position eight-way valve to be in two parallel straight-through positions; The hydraulic oil output by the main oil pump enters the rodless chamber of the second oil cylinder through the six-position eight-way valve, pushing the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to advance synchronously and uniformly. During the uniform advancement of the second concrete cylinder piston, the hydraulic oil in the rod chamber of the second oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the rodless chamber of the second concrete cylinder enters the confluence chamber through the second mixing chamber and the C valve and is then pushed out at a uniform speed. The auxiliary oil pump outputs hydraulic oil into the rod chamber of the first oil cylinder through the six-position eight-way valve, pushing the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to synchronously accelerate and retract. During the accelerated retraction of the first concrete cylinder piston, the hydraulic oil in the rodless chamber of the first oil cylinder returns to the oil tank through the six-position eight-way valve, and the material in the first feed box is sucked into the rodless chamber of the first concrete cylinder through the A valve and the first mixing chamber; Before the second concrete cylinder piston finishes pushing the material at a uniform speed, the first concrete cylinder piston completes the material suction process of the first concrete cylinder; (4) Control the piston of the first concrete cylinder to start entering the uniform acceleration pushing stage, and the piston of the second concrete cylinder to start entering the uniform deceleration pushing stage: Control valves B and C to be in the open state, valves A and D to be in the closed state, and the six-position eight-way valve to be in two open and closed positions; The hydraulic oil output by the main oil pump enters the rodless chamber of the first oil cylinder and the rodless chamber of the second oil cylinder respectively through the six-position eight-way valve, pushing the first oil cylinder piston, the first piston rod, and the first concrete cylinder piston to accelerate synchronously and uniformly, and pushing the second oil cylinder piston, the second piston rod, and the second concrete cylinder piston to decelerate synchronously and uniformly. The hydraulic oil of the rod chambers of the first oil cylinder and the second oil cylinder returns to the oil tank respectively through the six-position eight-way valve. The materials in the rodless chamber of the first concrete cylinder are accelerated and pushed out after entering the confluence chamber through the first mixing chamber and the B valve. The materials in the rodless chamber of the second concrete cylinder are decelerated and pushed out after entering the confluence chamber through the second mixing chamber and the C valve. There is no hydraulic oil output from the auxiliary oil pump; When the second concrete cylinder piston finishes pushing materials at a uniform deceleration rate, the first concrete cylinder piston synchronously ends pushing materials at a uniform acceleration rate and enters pushing materials at a uniform speed; (5) Repeat steps (1) to (4) in a loop.

8. The method for controlling upward conveying of a mine paste filling by an industrial pump for upward conveying of mine paste filling as claimed in claim 7, characterized in that: The switching time of the main oil pump and the auxiliary oil pump and the pumping pressure of the main oil pump and the auxiliary oil pump satisfy the following relationship: Where, t—commutation time, s; F-pump outlet pumping pressure, N d-inner diameter of upward pipeline, m; L-upward pipeline length, m; ρ-paste slurry density, kg / m 3 g-gravitational acceleration, m / s 2 v0-flow velocity in the pipeline before switching, m / s; θ-upward slope of pipeline; v t -Instantaneous flow velocity in the upward pipeline, m / s; f(v t ,d,ρ)-the flow velocity in the upward pipeline is v t The flow resistance function corresponding to , N.

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