A backflow blocking prevention device for deep-sea mining pump

Abstract

The present invention discloses a backflow blocking device for a deep-sea mining pump, comprising a combined pipe, a shunt pipe mechanism, an upper clamping mechanism, a lower clamping mechanism, and a hydraulic power system. The combined pipe has a soft rubber sheet and a side column arranged along its axial direction, and the soft rubber sheet and the side column together surround and form a columnar channel for the circulation of ore slurry. The upper clamping mechanism has a second driving mechanism for squeezing the soft rubber sheet toward the central area of ​​the columnar channel, and the lower clamping mechanism has a third driving mechanism for squeezing the soft rubber sheet toward the central area of ​​the columnar channel. Through the backflow blocking device for the deep-sea mining pump, most of the refluxed tuberculosis particles can continue to flow back downward to the lifting hard pipe, effectively avoiding the deep-sea mining pump, thereby preventing a large number of particles from flowing back and settling and accumulating in the deep-sea mining pump.

Description

Technical Field

[0001] The invention relates to the field of deep-sea mining equipment, and in particular to a backflow blocking prevention device for a deep-sea mining pump. Background Art

[0002] The deep sea mining systems currently used include: Figure 1 As shown in the figure, the deep-sea mining system is composed of three parts: the surface support subsystem (ore collecting ship A); the hydraulic lifting subsystem (lifting hard pipe B, space guide vane multi-stage ore pump C); the underwater ore collecting subsystem (intermediate silo D, conveying hose E and deep-sea ore collecting machine F). The deep-sea multi-stage ore pump is the core equipment of the ore lifting subsystem and is connected in series on the lifting hard pipe. The lifting hard pipe that is several thousand meters long makes it very difficult to lay and recover the entire lifting system. Once the ore pump fails in the deep sea, its subsequent repair and remedy is basically impossible. Therefore, whether it can operate stably and safely under all foreseeable working conditions is related to the reliability and service life of the entire system. For complex sea conditions, once encountering strong winds or typhoons, in order to ensure the safety of the surface support subsystem and the entire deep-sea mining system, the power supply may be directly cut off when the deep-sea ore pump is operating. Under this extreme condition, the nodule particles in the entire lifting system will begin to settle under the influence of their own weight. Once the reflux capacity of the mining pump is insufficient to ensure the smooth reflux of the nodule particles, the nodule particles will settle and accumulate. The particles will agglomerate and accumulate in the pump, causing blockage (see Figure 2 ). When the particle blockage is serious, it will cause the entire deep-sea mining pump to be damaged and endanger the entire deep-sea mining system.

[0003] The applicant searched and found that: the invention with application number: CN202010577113.3 discloses a backflow protection device for a deep-sea mining ore pump, including a flow pipe, an anti-backflow baffle, a suction piece and a control switch, wherein the two ends of the flow pipe are respectively connected to the ore pipe and the outlet pipe of the ore pump, and an anti-backflow baffle is arranged in the flow pipe for blocking the flow of the pipe. One end of the anti-backflow baffle is hinged to the inner wall of the flow pipe, and the free end can rotate around the hinge to achieve blocking and opening of the flow pipe. The suction piece is arranged on the inner wall of the flow pipe, and the free end of the anti-backflow baffle can be adsorbed and connected to the inner wall of the flow pipe through the suction piece to achieve circulation in the flow pipe, and the control switch controls the suction and disconnection of the suction piece and the anti-backflow baffle. The invention blocks the flow of pipelines through an anti-backflow baffle to prevent particles from flowing back into the pump and causing blockage in the pump when the pump is shut down. When the deep-sea mining pump is shut down for a long time and the pipeline path above the anti-backflow baffle is long, the accumulated particles above the baffle will accumulate high, especially the flow pipeline will be full of particles. When the deep-sea mining pump is powered on again, the resistance to be overcome in pushing the anti-backflow baffle to reopen is relatively large, which may cause the motor of the deep-sea mining pump to overload, causing certain systemic risks. Summary of the invention

[0004] The purpose of the present invention is to provide a deep-sea mining pump anti-backflow blockage device. The deep-sea mining pump anti-backflow blockage device can prevent most of the nodule particles from naturally falling back from the deep-sea mining pump when the nodule particles begin to settle under the influence of their own weight, thereby improving the blockage caused by agglomeration and accumulation of particles in the pump.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] A backflow blocking prevention device for a deep-sea mining pump, characterized in that it comprises:

[0007] The combined pipe has a soft rubber sheet and a side column arranged along its axial direction, and the soft rubber sheet and the side column together surround and form a columnar channel for the ore slurry to flow.

[0008] The shunt pipe mechanism comprises a receiving pipe obliquely slidably arranged on the side column, the receiving pipe is driven by a first driving mechanism to realize that the inner end of the receiving pipe has two position states: aligned with the inner wall of the columnar channel (the inner wall of the side column) and extending into the central area of ​​the columnar channel, and the inner end of the upper side surface of the receiving pipe has an upper opening for the slurry to flow into the internal channel of the receiving pipe,

[0009] The upper clamping mechanism has a second driving mechanism for pressing the soft film toward the central area of ​​the columnar channel, so that the two soft films are attached to each other in the central area of ​​the columnar channel, dividing the columnar channel into two left and right guide channels.

[0010] The lower clamping mechanism has a third driving mechanism for pressing the soft plastic sheets toward the central area of ​​the columnar channel, so that the two soft plastic sheets are attached to the front and rear sides of the receiving tube.

[0011] A hydraulic power system is connected to the first drive mechanism, the second drive mechanism and the third drive mechanism, and can drive the first drive mechanism, the second drive mechanism and the third drive mechanism to work after power failure.

[0012] Furthermore, preferably, the combined tube further comprises an outer support sheet located outside the soft rubber sheet, the outer support sheet is fixed to the side column, and the side edge of the soft rubber sheet is clamped and fixed between the outer support sheet and the side column.

[0013] Further, preferably, the first driving mechanism comprises a first oil cylinder, the axial direction of the first oil cylinder is arranged parallel to the axial direction of the receiving tube, and the telescopic rod of the first oil cylinder is fixed to the receiving tube.

[0014] Further, as a preference, the second driving mechanism comprises a second oil cylinder and a pressure rod, the telescopic rod of the second oil cylinder is fixed to the pressure rod, and the pressure rod is vertically arranged.

[0015] Further, preferably, the third driving mechanism comprises a third oil cylinder and a pressing block, the telescopic rod of the third oil cylinder is fixed to the pressing block, and the pressing block is in an inverted V shape.

[0016] Furthermore, preferably, the outer support sheet is provided with a first slot for the pressure rod to pass through and a second slot for the pressure block to pass through.

[0017] Further, preferably, the shunt pipe mechanism comprises a shunt pipe, a sleeve and a receiving pipe, the upper end of the shunt pipe is fixed to and connected to the sleeve, the sleeve is fixed to the side column, and the outer end of the receiving pipe is inserted and slidably disposed in the sleeve.

[0018] Further, as a preferred embodiment, the hydraulic power system includes a hydraulic accumulator, a first power-off normally open solenoid valve, a second power-off normally open solenoid valve, a first solenoid valve, a second solenoid valve, an oil pump and an oil storage tank, wherein the hydraulic accumulator, the first solenoid valve, the oil cylinder, the oil pump, the second solenoid valve and the oil storage tank are connected in sequence, the oil circuits of the first solenoid valve and the first power-off normally open solenoid valve are arranged in parallel, and the two ends of the second power-off normally open solenoid valve are respectively connected to the oil cylinder and the oil storage tank. The oil cylinder refers to each oil cylinder of the first drive mechanism, the second drive mechanism and the third drive mechanism.

[0019] Further, as a preference, the hydraulic power system also includes a buffer oil tank, a third solenoid valve, a fourth solenoid valve and a fifth solenoid valve, the oil cylinders of the second drive mechanism and the third drive mechanism are connected to the first solenoid valve via the buffer oil tank, the buffer oil tank is connected to the hydraulic accumulator via the third solenoid valve, the oil pump and the fourth solenoid valve in turn, and the oil pump is connected to the oil storage tank via the fifth solenoid valve.

[0020] Further, as a preference, a support frame is fixed on the combined pipe, the support frame fixes the outer support sheet and the side column, and the first drive mechanism, the second drive mechanism and the third drive mechanism are installed on the support frame.

[0021] Compared with the prior art, the present invention has the following advantages and effects: through the anti-backflow blocking device of the deep-sea mining pump, most of the refluxed nodule particles can enter the receiving pipe from the diversion channel and the upper opening, and then enter the casing and the diversion pipe, and continue to flow back downward from the lifting hard pipe below the deep-sea mining pump, effectively avoiding the deep-sea mining pump, thereby avoiding the situation where a large number of particles flow back and settle and accumulate in the deep-sea mining pump, thereby greatly improving the blockage caused by the agglomeration and accumulation of particles in the pump, and greatly reducing the influence of the deposited particles on the load of the deep-sea mining electric pump, thereby largely avoiding the overload of the motor of the deep-sea mining pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a deep-sea mining system.

[0023] Figure 2 It is a schematic diagram of the agglomeration and accumulation of particles in the pump.

[0024] Figure 3 It is a schematic diagram of the installation structure of the anti-backflow blocking device of the deep-sea mining pump according to an embodiment of the present invention.

[0025] Figure 4 It is a schematic structural diagram of a backflow prevention and blocking device according to an embodiment of the present invention.

[0026] Figure 5 It is a schematic structural diagram of the second driving mechanism of an embodiment of the present invention.

[0027] Figure 6 It is a schematic structural diagram of the second driving mechanism of an embodiment of the present invention.

[0028] Figure 7 It is a schematic structural diagram of the third driving mechanism of an embodiment of the present invention.

[0029] Figure 8 It is a schematic structural diagram of the third driving mechanism of an embodiment of the present invention.

[0030] Fig. 9 It is a structural schematic diagram of a compression rod according to an embodiment of the present invention.

[0031] Fig.10 It is a schematic diagram of the structure of a pressing block according to an embodiment of the present invention.

[0032] Fig.11 It is a structural schematic diagram of a hydraulic power system according to an embodiment of the present invention.

[0033] Fig.12 It is a structural schematic diagram of a hydraulic power system with a buffer oil tank according to an embodiment of the present invention.

[0034] Figure numerals: combined pipe 1, soft plastic sheet 11, side column 12, sliding groove 121, outer support sheet 13, first slot 131, second slot 132, columnar channel 14, guide channel 141, support frame 15, shunt pipe mechanism 2, shunt pipe 21, sleeve 22, receiving pipe 23, upper opening 231, first oil cylinder 24, upper clamping mechanism 3, second oil cylinder 31, pressure rod 32, lower clamping mechanism 4, third oil cylinder 41, pressure block 42, hydraulic accumulator 501, first power-off normally open solenoid valve 502, second power-off normally open solenoid valve 503, first solenoid valve 504, second solenoid valve 505, oil pump 506, oil storage tank 507, buffer oil tank 508, third solenoid valve 509, fourth solenoid valve 510, fifth solenoid valve 511 DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0036] See also Figure 1-Figure 12 The anti-backflow blocking device of the deep-sea mining pump of this embodiment includes a combined pipe 1, a diverter pipe mechanism 2, an upper clamping mechanism 3, a lower clamping mechanism 4, and a hydraulic power system.

[0037] See also Figure 4-Figure 8 The combined pipe 1 includes a soft rubber sheet 11, a side column 12, and an outer support sheet 13. The outer support sheet 13 is located on the outside of the soft rubber sheet 11. The outer support sheet 13 and the side column 12 are fixed. The side of the soft rubber sheet 11 is clamped and fixed between the outer support sheet 13 and the side column 12, and the soft rubber sheet 11 and the side column 12 are together surrounded to form a columnar channel 14 for the circulation of slurry. During the installation of the anti-backflow blockage device, the combined pipe 1 is connected to the top of the deep-sea mining pump. A support frame 15 is fixed on the combined pipe 1. The support frame 15 fixes the outer support sheet 13 and the side column 12. The first drive mechanism, the second drive mechanism and the third drive mechanism are installed on the support frame 15.

[0038] See also Figure 4 The shunt pipe mechanism 2 includes a shunt pipe 21, a sleeve 22 and a receiving pipe 23. The upper end of the shunt pipe 21 is fixed and connected to the sleeve 22. The sleeve 22 is fixed to the side column 12. The outer end of the receiving pipe 23 is inserted and slidably arranged in the sleeve 22. The lower end of the shunt pipe 21 is connected to the lifting hard pipe connected to the bottom of the deep-sea mining pump.

[0039] The side column 12 is provided with a sliding groove 121, and the receiving tube 23 is obliquely slidably arranged on the sliding groove 121. The receiving tube 23 is driven by a first driving mechanism to realize the oblique linear movement of the receiving tube 23 relative to the side column 12. The first driving mechanism includes a first oil cylinder 24. The axial direction of the first oil cylinder 24 is parallel to the axial direction of the receiving tube 23. The telescopic rod of the first oil cylinder 24 is fixed to the receiving tube 23. After the receiving tube 23 slides outward, the inner end of the receiving tube 23 is aligned with the inner wall of the columnar channel 14 (see Figure 5 , Figure 7 ), after the receiving tube 23 slides inward, the inner end of the receiving tube 23 extends into the central area of ​​the columnar channel 14 (see Figure 6 , Figure 8 ), the inner end of the upper side surface of the receiving tube 23 has an upper opening 231 for the slurry to flow into the internal channel of the receiving tube 23.

[0040] The upper clamping mechanism includes a second driving mechanism, which includes a second oil cylinder 31 and a pressure rod 32. The telescopic rod of the second oil cylinder 31 is fixed to the pressure rod 32, and the pressure rod 32 is arranged vertically. The second driving mechanism is used to squeeze the soft film 11 toward the central area of ​​the columnar channel 14, so that the two soft films 11 are attached to the central area of ​​the columnar channel 14, and the columnar channel 14 is divided into two left and right guide channels 141 (see Figure 6 ),

[0041] The lower clamping mechanism 4 has a third driving mechanism for pressing the soft rubber sheet 11 toward the central area of ​​the columnar channel 14, so that the two soft rubber sheets 11 are attached to the front and rear sides of the receiving tube 23. The third driving mechanism includes a third oil cylinder 41 and a pressing block 42, and the telescopic rod of the third oil cylinder 41 is fixed to the pressing block 42, and the pressing block 42 is in an inverted V shape.

[0042] The outer support plate 13 is provided with a first slot 131 for the pressure rod 32 to pass through and a second slot 132 for the pressure block 42 to pass through.

[0043] The hydraulic power system is connected to the first drive mechanism, the second drive mechanism and the third drive mechanism, and can drive the first drive mechanism, the second drive mechanism and the third drive mechanism to work after power failure.

[0044] The hydraulic power system includes a hydraulic accumulator 501, a first power-off normally open solenoid valve 502, a second power-off normally open solenoid valve 503, a first solenoid valve 504, a second solenoid valve 505, an oil pump 506 and an oil storage tank 507. The hydraulic accumulator 501, the first solenoid valve 504, the oil cylinder, the oil pump 506, the second solenoid valve 505 and the oil storage tank 507 are connected in sequence, the oil circuits of the first solenoid valve 504 and the first power-off normally open solenoid valve 502 are arranged in parallel, and the two ends of the second power-off normally open solenoid valve 503 are respectively connected to the oil cylinder and the oil storage tank 507. The oil cylinder refers to each oil cylinder of the first drive mechanism, the second drive mechanism, and the third drive mechanism.

[0045] In order to reduce the pipeline resistance of the columnar channel 14, the inner end of the receiving tube 23 can be designed and manufactured to be an arc surface with the same diameter as the inner wall of the side column 12. When the inner end of the receiving tube 23 is aligned with the inner wall of the columnar channel 14, the interface of the columnar channel 14 is closer to a complete circle, and the pipeline resistance of the columnar channel 14 can also be relatively improved.

[0046] The main working process of the anti-backflow blocking device of the deep-sea mining pump includes the following two working stages:

[0047] Stage S1: When the power is cut off during the operation of the deep-sea mining pump, the power is cut off to the hydraulic power system at the same time. At this time, the first solenoid valve 504 and the second solenoid valve 505 are in the closed state, the first power-off normally open solenoid valve 502 and the second power-off normally open solenoid valve 503 are in the normally open state, and the oil in the hydraulic accumulator 501 enters one side of the oil cylinder through the first power-off normally open solenoid valve 502, and the oil cylinder starts to move. The oil on the other side of the oil cylinder enters the oil storage tank 507 through the pipeline, so that the telescopic rod of the first oil cylinder 24 is retracted, and the telescopic rods of the second oil cylinder 31 and the third oil cylinder 41 are extended. The direction of the oil circuit in the above process is as follows Fig.11 As shown by the hollow arrows. Thus, the inner ends of the left and right receiving tubes 23 move inward and converge to the central area of ​​the columnar channel 14 (see Figure 6 ); In the area above the inner end of the receiving tube 23, the front and rear soft films 11 are squeezed by two pressure rods 32, forming a corresponding guide channel 141 above the upper opening of the receiving tube 23 (see Figure 6 ); In the area on both sides of the inner end of the receiving tube 23, the two soft plastic sheets 11 are attached to the front and rear sides of the receiving tube 23, so that the actual effective flow cross-section of the columnar channel 14 below the receiving tube 23 is greatly reduced (see Figure 8 ), at this time, most of the refluxed tuberculosis particles can enter the receiving tube 23 from the guide channel 141 and the upper opening, and then enter the casing 22 and the shunt pipe 21, and continue to flow back downward from the lifting hard pipe below the deep-sea mining pump, effectively avoiding the deep-sea mining pump, thereby avoiding the situation where a large number of particles flow back and settle and accumulate in the deep-sea mining pump, thereby greatly improving the situation where particles agglomerate and accumulate in the pump and cause blockage, thereby providing a certain degree of safety protection for the deep-sea mining system after power failure, and when the deep-sea mining mining pump is shut down for a long time and the pipeline path above the anti-backflow baffle is long, since most of the particles bypass the deep-sea mining mining pump and flow back to the lifting hard pipe, when the deep-sea mining mining pump is powered on again, the influence of the deposited particles on the load of the deep-sea mining electric pump is greatly reduced, thereby largely avoiding the occurrence of overload of the motor of the deep-sea mining mining pump.

[0048] Stage S2: Before re-energizing the deep-sea mining pump during operation, the hydraulic power system is powered on first, the first power-off normally open solenoid valve 502 and the second power-off normally open solenoid valve 503 are in a closed state, the first solenoid valve 504 and the second solenoid valve 505 are controlled to be in an open state through a control module (such as an industrial control PLC, etc.), and the oil pump 506 is controlled to work, the hydraulic oil on one side of the cylinder is squeezed into the hydraulic accumulator 501 through a pipeline (because the other side of the cylinder is injected with oil), the hydraulic accumulator 501 re-accumulates energy, and the oil in the oil storage tank 507 is injected into the other side of the cylinder by the oil pump 506, so that the telescopic rod of the first cylinder 24 is extended, and the telescopic rods of the second cylinder 31 and the third cylinder 41 are retracted, the inner end of the receiving tube 23 is aligned with the inner wall of the columnar channel 14, and the soft rubber sheet 11 is restored to a state of being in contact with the outer support sheet 13 (such as Figure 5 , Figure 7 As shown in FIG. 1 , the sliding groove 121 on the side column 12 faces the opening on the inner wall of the columnar channel 14 and is closed by the inner end of the receiving tube 23, and then the first solenoid valve 504 and the second solenoid valve 505 are controlled to be in a closed state, and further wait for the deep-sea mining pump to be powered on again and start working. The direction of the oil circuit in the above process is as follows Fig.11 As shown by the internship arrow.

[0049] During the working process of the anti-backflow blocking device of the deep-sea mining pump of this embodiment after power is turned off, the front and rear soft plastic sheets 11 are squeezed by the two pressure rods 32 in the area above the inner end of the receiving tube 23, and a corresponding guide channel 141 is formed above the upper opening of the receiving tube 23 (see Figure 6 ), not only can the particles pass through the guide channel 141 during the falling process, thus largely avoiding the through-hole areas on the front and rear sides of the receiving tube 23, but also the area where the front and rear two soft plastic films 11 are squeezed by the two pressure rods 32 is located at the center of the columnar channel 14, which can largely avoid the particles from falling into the through-hole area between the two receiving tubes 23 during the falling process (since the inner end of the receiving tube 23 is an arc surface, a through-hole area will also be formed between the inner ends of the two receiving tubes 23 converging at the center), so that the particles can fall back into the upper opening of the receiving tube 23 with a high probability.

[0050] It should be noted that in the above-mentioned S1 stage, the telescopic rod of the first oil cylinder 24 is retracted due to the installation method. Figure 3 If the position is turned 180° and installed, the telescopic rod needs to be extended to meet the functional requirements. Fig.11 In the embodiment, the pipelines connected to the two oil ports of the first oil cylinder 24 also need to be adaptively modified.

[0051] In the above process, since the first drive mechanism, the second drive mechanism and the third drive mechanism act synchronously, there is a problem that during the squeezing of the two soft rubber sheets 11, the inner end of the receiving tube 23 moves inward. After the accumulation of such actions, the inner end of the receiving tube 23 will scratch and damage the soft rubber sheet 11. Therefore, as an improvement, the hydraulic power system can also be provided with a buffer oil tank 508, a third solenoid valve 509, a fourth solenoid valve 510 and a fifth solenoid valve 511. The oil cylinders of the second drive mechanism and the third drive mechanism are connected to the first solenoid valve 504 via the buffer oil tank 508. The buffer oil tank 508 is connected to the hydraulic accumulator 501 via the third solenoid valve 509, the oil pump 506 and the fourth solenoid valve 510 in turn. The oil pump 506 is connected to the oil storage tank 507 via the fifth solenoid valve 511. At this time, the main working process of the anti-backflow blockage device of the deep-sea mining pump includes the following three working stages.

[0052] Stage S1: When the power is cut off during the operation of the deep-sea mining pump, the power is cut off to the hydraulic power system at the same time. At this time, the first solenoid valve 504, the second solenoid valve 505, the third solenoid valve 509, and the fourth solenoid valve 510 are in a closed state, the fifth solenoid valve 511 is in an open state, the first power-off normally open solenoid valve 502 and the second power-off normally open solenoid valve 503 are in a normally open state, and the oil in the hydraulic accumulator 501 enters one side of the oil cylinder through the first power-off normally open solenoid valve 502, and the oil cylinder starts to move. The oil on the other side of the oil cylinder enters the oil storage tank 507 through the pipeline, so that the telescopic rod of the first oil cylinder 24 is retracted, and the second oil cylinder 31 and the third oil cylinder 41 are retracted. The telescopic rod is extended. Since the oil needs to pass through the buffer oil tank 508, the oil can enter the second oil cylinder 31 and the third oil cylinder 41 only after the buffer oil tank 508 is quickly filled. Therefore, the action time of the first oil cylinder 24 is earlier than that of the second oil cylinder 31 and the third oil cylinder 41. Therefore, the two soft plastic films 11 can be squeezed after the receiving tube 23 moves into place, thereby reducing the damage of the inner end of the receiving tube 23 to the soft plastic film 11. In addition, after the deep-sea mining pump is suddenly powered off, the mineral liquid in the lifting hard pipe still has a rising speed. The delayed action can reduce the damage of the water hammer effect to the structure of the present invention and the deep-sea mining pump to a certain extent. It should be noted that the pipelines where the second oil cylinder 31 and the third oil cylinder 41 are located are connected to the top position of the oil storage tank 507. The pipeline where the first solenoid valve 504 is located is connected to the bottom position of the oil storage tank 507. The direction of the oil circuit in the above process is as follows Fig.12 Indicated by hollow arrows.

[0053] S2 stage: Before re-energizing the deep-sea mining pump during operation, first power the hydraulic power system.

[0054] The first power-off normally open solenoid valve 502 and the second power-off normally open solenoid valve 503 are in a closed state, and the third solenoid valve 509 and the fourth solenoid valve 510 are in a closed state. The first solenoid valve 504, the second solenoid valve 505, and the fifth solenoid valve 511 are in an open state through a control module (such as an industrial control PLC, etc.), and the oil pump 506 is controlled to work, and the hydraulic oil on one side of the cylinder is squeezed into the hydraulic accumulator 501 through the pipeline (because the other side of the cylinder is injected with oil), the hydraulic accumulator 501 re-accumulates energy, and the oil in the oil storage tank 507 is injected into the other side of the cylinder by the oil pump 506, so that the telescopic rod of the first cylinder 24 is extended, and the telescopic rods of the second cylinder 31 and the third cylinder 41 are retracted, and the inner end of the receiving tube 23 is aligned with the inner wall of the columnar channel 14, and the soft rubber sheet 11 is restored to a state of being in contact with the outer support sheet 13 (such as Figure 5 , Figure 7 As shown in FIG. 1 , the sliding groove 121 on the side column 12 faces the opening on the inner wall of the columnar channel 14 and is closed by the inner end of the receiving tube 23. Fig.12 Indicated by the darker solid arrows.

[0055] S3 stage: through the control module (such as industrial control PLC, etc.), the first power-off normally open solenoid valve 502 and the second power-off normally open solenoid valve 503 are controlled to be in a closed state, the third solenoid valve 509 and the fourth solenoid valve 510 are controlled to be in an open state, the first solenoid valve 504, the second solenoid valve 505, and the fifth solenoid valve 511 are controlled to be in a closed state, and the oil pump 506 is controlled to work, and the oil in the buffer oil tank 508 is compressed into the hydraulic accumulator 501 through the third solenoid valve 509, the oil pump 506, and the fourth solenoid valve 510 (the direction of the oil circuit in the above process is as shown in FIG. Fig.12 Then, the first electromagnetic valve 504, the second electromagnetic valve 505, the third electromagnetic valve 509, and the fourth electromagnetic valve 510 are controlled to be in a closed state, and the fifth electromagnetic valve 511 is in an open state. At this time, the first power-off normally open electromagnetic valve 502 and the second power-off normally open electromagnetic valve 503 are in a closed state, and further wait for the deep-sea mining pump to be powered on again and start working.

[0056] The above contents described in this specification are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, as long as they do not deviate from the contents of the present specification or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A backflow blocking device for a deep-sea mining pump, characterized in that: include The combined pipe has a soft rubber sheet and a side column arranged along its axial direction, and the soft rubber sheet and the side column together surround and form a columnar channel for the ore slurry to flow. The shunt pipe mechanism comprises a receiving pipe obliquely slidably arranged on the side column, the receiving pipe is driven by a first driving mechanism to realize that the inner end of the receiving pipe has two position states: aligned with the inner wall of the columnar channel and extending into the central area of ​​the columnar channel, and the inner end of the upper side surface of the receiving pipe has an upper opening for the slurry to flow into the internal channel of the receiving pipe, The upper clamping mechanism has a second driving mechanism for pressing the soft film toward the central area of ​​the columnar channel, so that the two soft films are attached to each other in the central area of ​​the columnar channel, dividing the columnar channel into two left and right guide channels. The lower clamping mechanism has a third driving mechanism for pressing the soft plastic sheets toward the central area of ​​the columnar channel, so that the two soft plastic sheets are attached to the front and rear sides of the receiving tube. A hydraulic power system, wherein the hydraulic power system is connected to the first drive mechanism, the second drive mechanism and the third drive mechanism, and can drive the first drive mechanism, the second drive mechanism and the third drive mechanism to work after power failure, The combined tube also includes an outer support sheet located outside the soft rubber sheet, the outer support sheet is fixed to the side column, and the side edge of the soft rubber sheet is clamped and fixed between the outer support sheet and the side column. The second driving mechanism includes a second oil cylinder and a pressure rod, the telescopic rod of the second oil cylinder is fixed to the pressure rod, and the pressure rod is arranged vertically. The third driving mechanism comprises a third oil cylinder and a pressing block. The telescopic rod of the third oil cylinder is fixed to the pressing block, and the pressing block is in an inverted V shape.

2. The anti-backflow blocking device for a deep-sea mining pump according to claim 1 is characterized in that: The first driving mechanism comprises a first oil cylinder, the axial direction of the first oil cylinder is arranged parallel to the axial direction of the receiving tube, and the telescopic rod of the first oil cylinder is fixed to the receiving tube.

3. The anti-backflow blocking device for a deep-sea mining pump according to claim 1 is characterized in that: The outer support sheet is provided with a first slot for the pressure rod to pass through and a second slot for the pressure block to pass through.

4. The anti-backflow blocking device for a deep-sea mining pump according to claim 1 is characterized in that: The shunt pipe mechanism comprises a shunt pipe, a sleeve and a receiving pipe. The upper end of the shunt pipe is fixed and connected to the sleeve. The sleeve is fixed to the side column. The outer end of the receiving pipe is inserted and slidably arranged in the sleeve.

5. The backflow blocking prevention device for a deep-sea mining pump according to claim 1 is characterized in that: The hydraulic power system includes a hydraulic accumulator, a first power-off normally open solenoid valve, a second power-off normally open solenoid valve, a first solenoid valve, a second solenoid valve, an oil pump and an oil storage tank. The hydraulic accumulator, the first solenoid valve, the oil cylinder, the oil pump, the second solenoid valve and the oil storage tank are connected in sequence, the oil circuits of the first solenoid valve and the first power-off normally open solenoid valve are arranged in parallel, and the two ends of the second power-off normally open solenoid valve are respectively connected to the oil cylinder and the oil storage tank.

6. The anti-backflow blocking device for a deep-sea mining pump according to claim 1 is characterized in that: A support frame is fixed on the combined pipe, the support frame fixes the outer support sheet and the side column, and the first drive mechanism, the second drive mechanism and the third drive mechanism are installed on the support frame.

Images