A mud and water slag discharge system

Abstract

The present invention discloses a muddy water slag discharge system, which relates to the technical field of shaft boring machines. The system can be composed of several small circulation systems, each of which includes a mud pump, a pressure reducing device, a hydraulic valve, a safety valve, a pressure sensor and pipeline accessories. As the excavation depth increases, a plurality of second circulations can be connected in series between the first circulation arranged close to the ground and the third circulation connected to the main equipment for pipeline relay; each small circulation system can be started and stopped separately, and isolated from other parts by a hydraulic valve. When starting, the first circulation operation is realized first, and after the first circulation operation, the hydraulic valve is opened to realize the first and second circulations in series operation, and the operation of the entire large system is realized by analogy, so as to achieve the purpose of graded circulation, graded pressure reduction and step-by-step pressurization, and effectively reduce the damage to pipelines and other equipment caused by the impact force of the medium under large slope and high drop.

Description

Technical Field

[0001] The invention relates to the technical field of shaft boring machines, and more particularly to a muddy and water slag discharging system. Background Art

[0002] At present, shaft boring machines use a mud circulation mucking system as a pressure balance and mucking method for the excavation surface. Compared with the mechanical mucking method of the crane slag bucket, it effectively solves the problems of low work efficiency, high transportation costs, and high safety risks. However, when dealing with construction conditions with great depth and high drop, the circulation mucking shaft boring machine will face some new problems. For example, when excavating to a certain depth, the solid-liquid mud with a larger density ratio will produce uncontrollable pressure under the action of gravity, which can easily make the safety device of the relay system fail, and the pipeline has to be reinforced under the ultra-high working pressure.

[0003] In view of the problems of the mud-water circulation and slag-discharging system of the shaft boring machine, the circulation switching pressure impact element is prone to failure, and the pipeline overpressure failure, the Chinese patent with application number 202110631296.7 discloses "a mud circulation system for a deep shaft boring machine and its pressure reducing device", which can not work when the pressure difference between the slurry inlet pipe and the slurry outlet pipe is small, and can reduce the pressure of the liquid medium by making the liquid medium collide in the form of jet collision and vortex when the pressure difference between the two is large. This solution can effectively reduce the failure rate of the mud circulation system, but the device has a complex structure, high cost, and cannot achieve energy conversion and recycling.

[0004] Therefore, how to provide a mud and water slag discharge system that can not only deal with the problem of medium pressure impact on the mud and water slag discharge system under large slopes and high drops, but also realize the conversion and recovery of medium impact energy is a problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a mud and water slag discharge system for use under large slope and high drop working conditions. The system can realize graded circulation, graded pressure reduction, and step-by-step pressurization, thereby reducing the pressure impact of the mud medium on components during circulation switching, avoiding pipeline overpressure, and at the same time recycling the impact energy of the medium.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A muddy water slag discharge system is applied to the fluid medium conveying process under the working conditions of large slope and high drop, comprising: a first circulation arranged close to the ground, a third circulation connected to the main equipment and a second circulation, wherein at least one second circulation is arranged in series between the first circulation and the third circulation;

[0008] The first cycle includes a slurry feed pump, a first bypass valve and a first slurry discharge pump connected in sequence, the second cycle includes a first upper end slurry feed control valve, a first pressure reducing device, a first lower end slurry feed control valve, a second bypass valve, a second slurry discharge pump suction control valve, a second slurry discharge pump, a second slurry discharge pump outlet control valve and a third bypass valve connected in sequence, and the third cycle includes a second upper end slurry feed control valve, a second pressure reducing device, a second lower end slurry feed control valve, a fourth bypass valve, a third slurry discharge pump suction control valve, a third slurry discharge pump, a third slurry discharge pump outlet control valve and a fifth bypass valve connected in sequence;

[0009] A first slurry inlet valve is provided between the slurry inlet pump and the first upper slurry inlet control valve, a first slurry discharge valve is provided between the second slurry discharge pump outlet control valve and the first slurry discharge pump, a second slurry inlet valve is provided between the first lower end slurry inlet control valve and the second upper end slurry inlet control valve, and a second slurry discharge valve is provided between the third slurry discharge pump outlet control valve and the second slurry discharge pump suction port control valve.

[0010] Preferably, the first pressure reducing device and the second pressure reducing device both include a recovery device for converting impact energy of muddy water into electrical energy and an energy storage device for storing electrical energy.

[0011] Preferably, the recovery device includes a turbine for converting the impact energy of muddy water into rotational mechanical energy, a generator for converting mechanical energy into electrical energy, a reducer for connecting the turbine and the generator, and a voltage stabilizing device, wherein the voltage stabilizing device is used to stabilize the output of alternating current so that the voltage remains unchanged when the muddy water flow rate fluctuates.

[0012] Preferably, the slurry inlet pump is connected to the slurry inlet flowmeter, and the first slurry discharge pump is connected to the slurry discharge flowmeter.

[0013] Preferably, a safety valve is provided between the first lower end slurry inlet control valve and the second bypass valve, and between the second lower end slurry inlet control valve and the fourth bypass valve, and the safety valve is used for secondary protection of pipeline equipment.

[0014] Preferably, the inlet side of the second row slurry pump is connected to the second row slurry pump suction control valve, and the outlet side of the second row slurry pump is connected to the second row slurry pump outlet control valve; the inlet side of the third row slurry pump is connected to the third row slurry pump suction control valve, and the outlet side of the third row slurry pump is connected to the third row slurry pump outlet control valve;

[0015] The suction port control valve of the second row slurry pump and the suction port control valve of the third row slurry pump are both provided with a suction port pressure sensor and a suction port ball valve connected to the suction port pressure sensor;

[0016] An outlet pressure sensor and an outlet ball valve connected to the outlet pressure sensor are provided at the outlet control valve of the second row slurry pump and the outlet control valve of the third row slurry pump.

[0017] Preferably, the first upper slurry inlet control valve, the first lower slurry inlet control valve, the second upper slurry inlet control valve, the second lower slurry inlet control valve, the second row slurry pump suction control valve, the second row slurry pump outlet control valve, the third row slurry pump suction control valve and the third row slurry pump outlet control valve are all manual knife gate valves.

[0018] Preferably, the first bypass valve, the second bypass valve, the third bypass valve, the fourth bypass valve and the fifth bypass valve are all hydraulic ball valves.

[0019] Preferably, a third slurry inlet valve and a shield body slurry inlet control valve are sequentially provided between the second lower end slurry inlet control valve and the slurry inlet end of the shield body along the slurry inlet direction, and a shield body slurry discharge control valve and a third slurry discharge valve are sequentially provided between the slurry discharge end of the shield body and the third slurry discharge pump suction port control valve along the slurry discharge direction.

[0020] When using the mud and water slag discharge device provided by the present invention, during the excavation process of the tunnel boring machine, first, the first cycle can be started, that is, the slurry feed pump arranged on the ground is started, the first bypass valve is opened, the first slurry feed valve and the first slurry discharge valve are closed, and then, the first slurry discharge pump is started, and it is determined whether the first cycle is operating normally. When the flow of the first slurry discharge pump gradually stabilizes, the second cycle can be started, that is, the first slurry feed valve, the first slurry discharge valve, the second bypass valve and the third bypass valve are opened, and the first bypass valve is closed; then, the second slurry discharge pump of the second cycle is started to perform the slurry discharge operation. When the mud passes through the first pressure reducing device arranged on the slurry feed pipeline, the first pressure reducing device can perform pressure reducing and energy dissipation operation on the mud, so that the pressure effect of the mud on the pipeline and equipment is significantly reduced. When the first second cycle is operating normally, the above operation can be repeated to start the second or third second cycle connected in series in sequence. Finally, the above operation can be repeated to start the third cycle, thereby realizing the start of the entire large cycle. Moreover, each pressure reducing device can consume the impact force of the mud medium and convert it into electrical energy for use or storage by other power-consuming equipment, thereby minimizing the damage to pipelines and other equipment caused by the impact force of the medium under large slopes and high drops.

[0021] When the tunnel boring machine needs to stop excavation, the fourth slurry discharge valve and the fifth bypass valve of the third cycle can be opened first, and the third slurry inlet valve and the third slurry discharge valve can be closed. After the mud flow is stable, the pipeline is circulated and flushed, and then the third slurry discharge pump is slowly closed. Then, the second slurry inlet valve and the second slurry discharge valve are closed, and the second bypass valve and the third bypass valve are opened. After the mud flow is stable, the pipeline is circulated and flushed, and then the second cycle is slowly closed. Operate in sequence, and finally slowly close the ground slurry inlet pump and the first slurry discharge pump to realize the closure of the entire system. The circulation system of this device is composed of ground equipment, internal equipment of the tunnel boring machine and several small circulation modules, and each small circulation module has a high degree of integration, which can meet the needs of quickly adding relay circulation modules when the excavation depth increases. Moreover, this device can realize graded circulation, graded decompression, and step-by-step pressurization to reduce the pressure impact of the mud medium on components.

[0022] In summary, the mud and water slag discharge device provided by the present invention can realize graded circulation, graded pressure reduction, and step-by-step pressurization, thereby reducing the pressure impact of the mud medium on components, thereby solving the problem of the mud circulation system being subjected to medium pressure impact under large slopes and high drops. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the muddy water slag discharging system provided by the present invention;

[0025] Figure 2 It is a schematic structural diagram of the first pressure reducing device.

[0026] Figure 1 and Figure 2 middle:

[0027] 1 is the first cycle, 11 is the slurry inlet pump, 12 is the first bypass valve, 13 is the first slurry discharge pump, 14 is the slurry inlet flowmeter, 15 is the slurry discharge flowmeter, 2 is the second cycle, 21 is the first upper end slurry inlet control valve, 22 is the first pressure reducing device, 221 is the recovery device, 2211 is the recovery chamber, 2212 is the turbine, 2213 is the reducer, 2214 is the generator, 222 is the energy storage device, 23 is the first lower end slurry inlet control valve, 24 is the second bypass valve, 25 is the second slurry discharge pump suction control valve, 251 is the suction pressure sensor, 252 is the suction ball valve, 26 is the second slurry discharge pump, 27 is the second slurry discharge pump outlet control Valve, 271 is the outlet pressure sensor, 272 is the outlet ball valve, 28 is the third bypass valve, 3 is the third circulation, 31 is the second upper end slurry inlet control valve, 32 is the second pressure reducing device, 33 is the second lower end slurry inlet control valve, 34 is the fourth bypass valve, 35 is the third row slurry pump suction control valve, 36 is the third row slurry pump, 37 is the third row slurry pump outlet control valve, 38 is the fifth bypass valve, 4 is the first slurry inlet valve, 5 is the first slurry discharge valve, 6 is the second slurry inlet valve, 7 is the second slurry discharge valve, 8 is the safety valve, 9 is the shield body, 91 is the third slurry inlet valve, 92 is the shield body slurry inlet control valve, 93 is the shield body slurry discharge control valve, and 94 is the third slurry discharge valve. DETAILED DESCRIPTION

[0028] The core of the present invention is to provide a mud and water slag discharge system, which can realize graded circulation, graded pressure reduction, and step-by-step pressurization, reduce the impact of mud medium on components, and thus solve the problem of mud circulation system being impacted by medium pressure under large slope and high drop.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the muddy water slag discharging system provided by the present invention;

[0031] Figure 2 It is a schematic structural diagram of the first pressure reducing device.

[0032] In this embodiment, a muddy water slag discharge system is applied to the fluid medium conveying process under the working conditions of large slope and high drop, and comprises: a first circulation 1 arranged close to the ground, a third circulation 3 connected to the main equipment and a second circulation 2, and at least one second circulation 2 is arranged in series between the first circulation 1 and the third circulation 3;

[0033] The first circulation 1 includes a slurry inlet pump 11, a first bypass valve 12 and a first slurry discharge pump 13 connected in sequence along the slurry flow direction; the second circulation 2 includes a first upper slurry inlet control valve 21, a first pressure reducing device 22, a first lower slurry inlet control valve 23, a second bypass valve 24, a second slurry discharge pump suction port control valve 25, a second slurry discharge pump 26, a second slurry discharge pump outlet control valve 27 and a third bypass valve 28 connected in sequence along the slurry flow direction; the third circulation 3 includes a second upper slurry inlet control valve 31, a second pressure reducing device 32, a second lower slurry inlet control valve 33, a fourth bypass valve 34, a third slurry discharge pump suction port control valve 35, a third slurry discharge pump 36, a third slurry discharge pump outlet control valve 37 and a fifth bypass valve 38 connected in sequence along the slurry flow direction; wherein the bypass valve refers to a valve installed on the bypass pipe, and the switching operation between the small circulation and the large circulation can be realized by controlling the opening and closing of the bypass valve.

[0034] A first slurry inlet valve 4 is provided between the slurry inlet pump 11 and the first upper slurry inlet control valve 21, a first slurry discharge valve 5 is provided between the second slurry discharge pump outlet control valve 27 and the first slurry discharge pump 13, a second slurry inlet valve 6 is provided between the first lower slurry inlet control valve 23 and the second upper slurry inlet control valve 31, and a second slurry discharge valve 7 is provided between the third slurry discharge pump outlet control valve 37 and the second slurry discharge pump suction port control valve 25; wherein, the first slurry inlet valve 4, the second slurry inlet valve 6, the first slurry discharge valve 5 and the second slurry discharge valve 7 are all used to separate and connect each small circulation system. Moreover, each slurry inlet valve and slurry discharge valve is preferably a hydraulic ball valve, and the isolation operation between each small circulation can be realized by setting the slurry inlet valve and the slurry discharge valve.

[0035] When using the mud and water slag discharge device provided by the present invention, during the excavation process of the tunneling machine, first, the first cycle 1 can be started, that is, the slurry feed pump 11 set on the ground is started, the first bypass valve 12 is opened, the first slurry feed valve 4 and the first slurry discharge valve 5 are closed, and then the first slurry discharge pump 13 is started, and it is judged whether the first cycle 1 is operating normally. When the flow of the first slurry discharge pump 13 gradually stabilizes, the second cycle 2 can be started, that is, the first slurry feed valve 4, the first slurry discharge valve 5, the second bypass valve 24 and the third bypass valve 28 are opened, and the first bypass valve 12 is closed; then, the second slurry discharge pump 26 of the second cycle 2 is started to discharge slurry. When the mud passes through the first pressure reducing device 22 set on the slurry feed pipeline, the first pressure reducing device 22 can perform pressure reduction and energy dissipation operations on the mud, so that the pressure effect of the mud on the pipeline and equipment is significantly reduced. When the first second cycle 2 is operating normally, the above operation can be repeated to start the second or third second cycle 2 connected in series in sequence. Finally, the above operation can be repeated to start the third cycle 3, thereby realizing the start of the entire large cycle.

[0036] When the tunnel boring machine needs to stop excavation, the fourth slurry discharge valve and the fifth bypass valve 38 of the third circulation 3 can be opened first, the third slurry inlet valve 91 and the third slurry discharge valve 94 can be closed, and the pipeline can be circulated and flushed after the mud flow is stable, and then the third slurry discharge pump 36 can be slowly closed. Then, the second slurry inlet valve 6 and the second slurry discharge valve 7 are closed, and the second bypass valve 24 and the third bypass valve 28 are opened. After the mud flow is stable, the pipeline is circulated and flushed, and then the second circulation 2 is slowly closed. Operate in sequence, and finally slowly close the ground slurry inlet pump 11 and the first slurry discharge pump 13 to realize the closure of the entire system. The circulation system of this device is composed of ground equipment, internal equipment of the tunnel boring machine and several small circulation modules, and each small circulation module has a high degree of integration, which can meet the needs of quickly increasing the relay circulation module when the excavation depth increases. Moreover, this device can realize graded circulation, graded decompression, and step-by-step pressurization to reduce the pressure impact of the mud medium on components.

[0037] In summary, the mud and water slag discharge device provided by the present invention can realize graded circulation, graded pressure reduction, and step-by-step pressurization, thereby reducing the pressure impact of the mud medium on components, thereby solving the problem of the mud circulation system being subjected to medium pressure impact under large slopes and high drops.

[0038] On the basis of the above embodiment, preferably, the first pressure reducing device 22 and the second pressure reducing device 32 both include a recovery device 221 for converting the impact energy of the mud into electric energy and an energy storage device 222 for storing electric energy. The pressure reducing device of the present application can use the fluid kinetic energy to drive the operation of the turbine unit to generate electricity, and the generated electric energy can be collected by using an electric storage device, or the generated electric energy can be directly stabilized by using a voltage stabilizing module and directly transmitted to other devices for use.

[0039] Preferably, the recovery device 221 includes a turbine 2212 for converting the impact energy of muddy water into rotational mechanical energy, a generator 2214 for converting mechanical energy into electrical energy, a reducer 2213 for connecting the turbine 2212 and the generator 2214, and a voltage stabilizing device, the voltage stabilizing device is used to output AC power stably so that the voltage remains unchanged when the muddy water flow rate fluctuates. In addition, the recovery device 221 includes but is not limited to the generator 2214 that can realize the conversion of kinetic energy into electrical energy. The recovery device 221 and the energy storage device 222 can be set according to the actual situation and actual needs during actual use.

[0040] Preferably, the slurry inlet pump 11 is connected to the slurry inlet flowmeter 14, and the first slurry discharge pump 13 is connected to the slurry discharge flowmeter 15. By installing flowmeters on the slurry inlet and discharge pipelines, the working status of the circulation system can be monitored in real time.

[0041] It should be noted that the first cycle 1 includes a slurry feed pump 11, a slurry feed flow meter 14, a first bypass valve 12, a first slurry discharge pump 13 and a slurry discharge flow meter 15 which are sequentially arranged along the slurry flow direction. When starting the first cycle 1, the first bypass valve 12 is first opened, the first slurry feed valve 4 and the first slurry discharge valve 5 are closed, and then the slurry feed pump 11 and the first slurry discharge pump 13 on the ground are started to circulate the slurry water. The flow matching between the slurry feed flow meter 14 and the slurry discharge flow meter 15 can be observed to determine whether the first cycle 1 is operating normally.

[0042] Preferably, a safety valve 8 is provided between the first lower end slurry inlet control valve 23 and the second bypass valve 24, and between the second lower end slurry inlet control valve 33 and the fourth bypass valve 34. The safety valve 8 is used for secondary protection of the pipeline equipment. The structure is as follows: Figure 1 By adding a safety valve 8 behind the pressure reducing device, it can be ensured that even if the pressure of the mud medium is still high after the pressure reducing treatment of the pressure reducing device, the normal operation of the pipeline equipment can be guaranteed under the action of the safety valve 8, so as to provide secondary protection for the pipeline equipment.

[0043] Preferably, the inlet side of the second row slurry pump 26 is connected to the second row slurry pump suction control valve 25, and the outlet side of the second row slurry pump 26 is connected to the second row slurry pump outlet control valve 27; the inlet side of the third row slurry pump 36 is connected to the third row slurry pump suction control valve 35, and the outlet side of the third row slurry pump 36 is connected to the third row slurry pump outlet control valve 37;

[0044] A suction port pressure sensor 251 and a suction port ball valve 252 connected to the suction port pressure sensor 251 are provided at the suction port control valve 25 of the second row pulp pump and the suction port control valve 35 of the third row pulp pump;

[0045] The outlet control valve 27 of the second slurry pump and the outlet control valve 37 of the third slurry pump are both provided with an outlet pressure sensor 271 and an outlet ball valve 272 connected to the outlet pressure sensor 271. The pressure sensors provided at the suction port and the outlet of each slurry pump are used to monitor the changes in the medium pressure at the inlet and outlet of the slurry pump, so that the operator can adjust the operating state of the slurry pump according to the pressure conditions.

[0046] On the basis of the above embodiments, preferably, the first upper slurry inlet control valve 21, the first lower slurry inlet control valve 23, the second upper slurry inlet control valve 31, the second lower slurry inlet control valve 33, the second row slurry pump suction control valve 25, the second row slurry pump outlet control valve 27, the third row slurry pump suction control valve 35 and the third row slurry pump outlet control valve 37 are all manual knife gate valves.

[0047] Preferably, the first bypass valve 12 , the second bypass valve 24 , the third bypass valve 28 , the fourth bypass valve 34 and the fifth bypass valve 38 are all hydraulic ball valves.

[0048] Preferably, a third slurry inlet valve 91 and a shield body slurry inlet control valve 92 are sequentially provided along the slurry inlet direction between the second lower end slurry inlet control valve 33 and the slurry inlet end of the shield body 9, and a shield body slurry discharge control valve 93 and a third slurry discharge valve 94 are sequentially provided along the slurry discharge direction between the slurry discharge end of the shield body 9 and the third slurry discharge pump suction control valve 35 to realize the connection between the circulation system and the shield body, thereby controlling the mud and water entering and exiting the excavation chamber.

[0049] In order to further illustrate the use of the muddy water slag discharge system provided by the present invention, an example is given below. The excavation process of the equipment includes two processes: starting and stopping.

[0050] During the startup process, the first cycle 1 can be started, that is, the first bypass valve 12 is opened, the first slurry inlet valve 4 and the first slurry discharge valve 5 are closed, and then the slurry inlet pump 11 and the first slurry discharge pump 13 set on the ground are started, and the matching of the flow of the slurry inlet flowmeter 14 and the slurry discharge flowmeter 15 is observed to determine whether the first cycle 1 is running. When the flow gradually stabilizes, the second cycle 2 can be started, that is, the first slurry inlet valve 4, the first slurry discharge valve 5, the second bypass valve 24 and the third bypass valve 28 are opened, and the first bypass valve 12 is closed; then, the second slurry discharge pump 26 of the second cycle 2 is started to circulate mud and water; when the mud and water pass through the first pressure reducing device 22 set on the slurry inlet pipeline, the first pressure reducing device 22 can reduce the pressure and dissipate the energy of the mud and water, so that the impact of the mud and water on the pipeline and equipment is significantly reduced. In addition, the safety valve 8 set on the slurry inlet pipeline can provide secondary protection for the pipeline equipment; the suction port pressure sensor 251 and the outlet pressure sensor 271 respectively set at the suction port and outlet of the slurry discharge pump can monitor the pressure change of the medium in the pipeline. When the second cycle 2 is running normally, the above operation can be repeated to start the third cycle 3 in series in sequence, thereby realizing the start of the entire large cycle.

[0051] Furthermore, when the equipment needs to stop excavation, the fourth bypass valve 34 and the fifth bypass valve 38 of the third circulation 3 can be opened first, the third slurry inlet valve 91 and the third slurry discharge valve 94 can be closed, and the pipeline can be flushed after the mud flow rate is stable, and then the third slurry discharge pump 36 can be slowly closed. Then, the second slurry inlet valve 6 and the second slurry discharge valve 7 are closed, and the second bypass valve 24 and the third bypass valve 28 are opened. After the mud flow rate is stable, the pipeline is flushed, and then the second circulation 2 is slowly closed. The operations are performed in sequence, and finally the slurry inlet pump 11 and the first slurry discharge pump 13 on the ground are slowly closed to realize the shutdown of the entire system.

[0052] In summary, the mud and water slag discharge system provided by the present invention can realize graded circulation, graded pressure reduction, and step-by-step pressurization, thereby reducing the pressure impact of the mud medium on components, thereby solving the problem of the mud circulation system being subjected to medium pressure impact under large slopes and high drops.

[0053] The muddy water slag discharging system provided in this embodiment has the following beneficial effects:

[0054] 1. The system consists of ground equipment, equipment inside the tunnel boring machine and several small loops. Each small loop is composed of conventional shield circulation system components and can be integrated into modules to meet the need to quickly increase the relay circulation module when the tunneling depth increases;

[0055] 2. The mud and water slag discharge system can realize graded circulation, graded pressure reduction, and step-by-step pressurization, which can effectively reduce the pressure impact of the medium on components;

[0056] 3. By installing a pressure reducing device on the slurry inlet pipeline of each stage of small circulation, the impact pressure of the medium can be recovered and utilized;

[0057] 4. By adding a safety valve 8, the pipeline equipment can be protected for a second time, effectively solving the pipeline overpressure problem and greatly reducing the safety risk of the equipment.

[0058] It should be noted that the "first", "second", "third", "fourth" and "fifth" used in the naming of components in this application document are only for distinguishing positions, and there is no order of precedence. In addition, the directions or positional relationships indicated by "up and down", "in and out" and so on in this application are based on the directions or positional relationships shown in the drawings, and are only for the convenience of simplifying the description and facilitating understanding, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0059] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other. Any combination of all the embodiments provided by the present invention is within the protection scope of this invention. In addition, specific examples are used herein to illustrate the principles and implementation methods of the present invention, and the description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, such as using this solution to transport fluid media under similar large slope and high drop conditions, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A muddy water slag discharge system, applied to the fluid medium conveying process under the condition of large slope and high drop, characterized in that: include: A first loop (1) arranged close to the ground, a third loop (3) connected to the main device, and a second loop (2), wherein at least one second loop (2) is connected in series between the first loop (1) and the third loop (3); The first cycle (1) comprises a slurry feed pump (11), a first bypass valve (12) and a first slurry discharge pump (13) connected in sequence; the second cycle (2) comprises a first upper slurry feed control valve (21), a first pressure reducing device (22), a first lower slurry feed control valve (23), a second bypass valve (24), a second slurry discharge pump suction control valve (25), a second slurry discharge pump (26), a second slurry discharge pump outlet control valve (27) and a third bypass valve (28) connected in sequence; the third cycle (3) comprises a second upper slurry feed control valve (31), a second pressure reducing device (32), a second lower slurry feed control valve (33), a fourth bypass valve (34), a third slurry discharge pump suction control valve (35), a third slurry discharge pump (36), a third slurry discharge pump outlet control valve (37) and a fifth bypass valve (38) connected in sequence; A first slurry inlet valve (4) is provided between the slurry inlet pump (11) and the first upper slurry inlet control valve (21); a first slurry discharge valve (5) is provided between the second slurry discharge pump outlet control valve (27) and the first slurry discharge pump (13); a second slurry inlet valve (6) is provided between the first lower slurry inlet control valve (23) and the second upper slurry inlet control valve (31); and a second slurry discharge valve (7) is provided between the third slurry discharge pump outlet control valve (37) and the second slurry discharge pump suction port control valve (25); the first pressure reducing device (22) and the second pressure reducing device (32) both comprise a recovery device (221) for converting impact energy of slurry into electrical energy and an energy storage device (222) for storing electrical energy; the recovery device (221) comprises a device for converting slurry impact energy into electrical energy; A water turbine (2212) for converting the impact energy of water into rotational mechanical energy, a generator (2214) for converting mechanical energy into electrical energy, a reducer for connecting the water turbine (2212) and the generator (2214), and a voltage stabilizing device, wherein the voltage stabilizing device is used to output alternating current in a stable manner so that the voltage remains unchanged when the muddy water flow rate fluctuates; the inlet side of the second slurry pump (26) is connected to the second slurry pump suction control valve (25), and the outlet side of the second slurry pump (26) is connected to the second slurry pump outlet control valve (27); the inlet side of the third slurry pump (36) is connected to the third slurry pump suction control valve (35), and the outlet side of the third slurry pump (36) is connected to the third slurry pump outlet control valve (37); A suction port pressure sensor (251) and a suction port ball valve (252) connected to the suction port pressure sensor (251) are provided at the suction port control valve (25) of the second row pulp pump and the suction port control valve (35) of the third row pulp pump; An outlet pressure sensor (271) and an outlet ball valve (272) connected to the outlet pressure sensor (271) are provided at the outlet control valve (27) of the second row slurry pump and the outlet control valve (37) of the third row slurry pump.

2. The muddy water slag discharge system according to claim 1, characterized in that: The slurry inlet pump (11) is connected to a slurry inlet flowmeter (14), and the first slurry discharge pump (13) is connected to a slurry discharge flowmeter (15).

3. The muddy water slag discharge system according to claim 1, characterized in that: Safety valves (8) are provided between the first lower end slurry inlet control valve (23) and the second bypass valve (24), and between the second lower end slurry inlet control valve (33) and the fourth bypass valve (34), and the safety valves (8) are used to provide secondary protection for pipeline equipment.

4. The muddy water slag discharge system according to any one of claims 1 to 3, characterized in that: The first upper slurry inlet control valve (21), the first lower slurry inlet control valve (23), the second upper slurry inlet control valve (31), the second lower slurry inlet control valve (33), the second row slurry pump suction control valve (25), the second row slurry pump outlet control valve (27), the third row slurry pump suction control valve (35) and the third row slurry pump outlet control valve (37) are all manual knife gate valves.

5. The muddy water slag discharge system according to any one of claims 1 to 3, characterized in that: The first bypass valve (12), the second bypass valve (24), the third bypass valve (28), the fourth bypass valve (34) and the fifth bypass valve (38) are all hydraulic ball valves.

6. The muddy water slag discharge system according to any one of claims 1 to 3, characterized in that: A third slurry inlet valve (91) and a shield slurry inlet control valve (92) are provided in sequence along the slurry inlet direction between the second lower end slurry inlet control valve (33) and the slurry inlet end of the shield body (9), and a shield slurry discharge control valve (93) and a third slurry discharge valve (94) are provided in sequence along the slurry discharge direction between the slurry discharge end of the shield body (9) and the third slurry discharge pump suction port control valve (35).

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