High-drop heading machine turbine motor pump set

Abstract

The application discloses a high-drop heading machine turbine motor pump set, which comprises a coaxial combination pump, a variable frequency motor, a slurry discharge pipeline, a slurry inlet pipeline, a driving counter-shock pressure reducer and a counter-shock pressure reduction drainage port, a slurry inlet overflow valve and a controller. The coaxial combination pump is arranged on a pump station base and comprises a transmission shaft, a rear pump shell, a pump body, a front pump shell, a turbine impeller and a pump impeller. The controller is connected with a rotating speed and torque sensor, the variable frequency motor, a slurry discharge flowmeter, a slurry inlet pressure sensor and a slurry inlet flowmeter circuit respectively, and is used for controlling the inertia of a variable inertia flywheel and the rotating speed of the variable frequency motor according to the detection results of the rotating speed and torque sensor, the slurry discharge flowmeter, the slurry inlet pressure sensor and the slurry inlet flowmeter, so that the slurry inlet turbine and the slurry discharge pump in the coaxial combination pump can work in a high-efficiency interval. The inlet pressure of the turbine impeller is adjusted and the rotating speed of the pump impeller is controlled, so that the slurry inlet turbine and the slurry discharge pump can work in a high-efficiency interval, the cost is low, the reliability is high, the corresponding speed is fast and the service life is long.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery, in particular to a turbine motor pump set for high-fall heading machine. BACKGROUND

[0002] In the conventional shaft and inclined shaft heading machine mud circulating system, the medium pressure generated by gravity in the slurry pipeline is usually eliminated by using conventional pressure reducing means such as pressure reducing valve, and the slurry pump is still a conventional variable frequency motor pump. However, in the deep shaft working condition, with the increase of the heading depth, the pressure generated by gravity in the medium will gradually increase, and the work done to overcome the gravity when the slurry is pumped back to the ground will also increase exponentially. Therefore, in the deep working condition, the reliability and economy of these conventional means will affect the safety factor of the whole system and the heading cost.

[0003] In the existing technology, that is, the conventional hydraulic turbine machine, the control of the rotating speed depends on the flow control of the variable guide vane and the pressure control of the pressure regulating well, so that it can work in the best working condition interval while meeting the required torque of the load. However, the erosion of the mud and the narrow space of the shaft make the complex variable guide vane mechanism and the pressure regulating well (cylinder) not very suitable for the deep shaft mud circulating system with limited space and harsh working conditions. SUMMARY

[0004] The present application provides a turbine motor pump set for high-fall heading machine to solve the technical problem that the existing hydraulic turbine machine is not very suitable for the deep shaft mud circulating system with limited space and harsh working conditions.

[0005] The technical solution adopted by the present application is as follows:

[0006] A turbine motor pump set for high-fall heading machine, comprising:

[0007] A coaxial combined pump is arranged on the pump station base and comprises a transmission shaft, a rear pump shell, a pump body, and a front pump shell. A middle part of the pump body is provided with an impeller inter-seal ring. Back-to-back turbine impellers and pump impellers are rotatably arranged on both sides of the impeller inter-seal ring. The rear pump shell is provided with a spiral suction chamber and a drain port and is sealingly connected to one side of the pump body to form a slurry pump with the pump impeller. The front pump shell is provided with a slurry inlet spiral drain chamber and a water inlet and is sealingly connected to the other side of the pump body to form a slurry inlet turbine with the turbine impeller. Both ends of the transmission shaft are rotatably supported by bearing boxes arranged on the pump station base, and the middle part penetrates the central holes of the rear pump shell, the pump body, the impeller inter-seal ring, and the front pump shell and is drivingly connected to the turbine impeller and the pump impeller;

[0008] A variable frequency motor is connected to a variable inertia flywheel through a shaft coupling provided with a rotating speed and torque sensor at one end and connected to the transmission shaft through a shaft coupling at the other end. The variable frequency motor and the variable inertia flywheel are arranged on the pump station base.

[0009] The slurry discharge pipeline includes a downstream slurry discharge pipeline and an upstream slurry discharge pipeline. One end of the downstream slurry discharge pipeline is connected to the water outlet of the rear pump shell through a slurry discharge tee joint, and the other end is sequentially connected to a slurry discharge flow meter and a sedimentation tank. One end of the upstream slurry discharge pipeline is connected to the spiral suction chamber of the rear pump shell, and the other end is connected to the excavation cabin.

[0010] The slurry inlet pipeline includes an upstream slurry inlet pipeline and a downstream slurry inlet pipeline. One end of the upstream slurry inlet pipeline is connected to the water inlet of the front pump shell, and the other end is sequentially connected to a slurry inlet pressure sensor, a slurry inlet flow meter, a slurry inlet pump and a pulp preparation tank. One end of the downstream slurry inlet pipeline is connected to the slurry inlet spiral drainage chamber of the front pump shell, and the other end is connected to the excavation cabin.

[0011] The slurry discharge pipeline includes a downstream slurry discharge pipeline and an upstream slurry discharge pipeline. One end of the downstream slurry discharge pipeline is connected to the water outlet of the rear pump shell through a slurry discharge tee joint, and the other end is sequentially connected to a slurry discharge flow meter and a sedimentation tank. One end of the upstream slurry discharge pipeline is connected to the spiral suction chamber of the rear pump shell, and the other end is connected to the excavation cabin.

[0012] The slurry inlet pipeline includes an upstream slurry inlet pipeline and a downstream slurry inlet pipeline. One end of the upstream slurry inlet pipeline is connected to the water inlet of the front pump shell, and the other end is sequentially connected to a slurry inlet pressure sensor, a slurry inlet flow meter, a slurry inlet pump and a pulp preparation tank. One end of the downstream slurry inlet pipeline is connected to the slurry inlet spiral drainage chamber of the front pump shell, and the other end is connected to the excavation cabin.

[0013] The controller is connected to the rotational speed and torque sensor, the variable frequency motor, the slurry discharge flow meter, the slurry inlet pressure sensor and the slurry inlet flow meter circuit, and is used to control the inertia of the variable inertia flywheel and the rotational speed of the variable frequency motor according to the detection results of the rotational speed and torque sensor, the slurry discharge flow meter, the slurry inlet pressure sensor and the slurry inlet flow meter, so that the slurry inlet turbine and the slurry discharge pump in the coaxial combined pump work in the high efficiency interval.

[0014] Further, the slurry inlet pipeline includes an upstream slurry inlet pipeline and a downstream slurry inlet pipeline. One end of the upstream slurry inlet pipeline is connected to the water inlet of the front pump shell, and the other end is sequentially connected to a slurry inlet pressure sensor, a slurry inlet flow meter, a slurry inlet pump and a pulp preparation tank. One end of the downstream slurry inlet pipeline is connected to the slurry inlet spiral drainage chamber of the front pump shell, and the other end is connected to the excavation cabin.

[0015] Further, the slurry inlet pipeline includes an upstream slurry inlet pipeline and a downstream slurry inlet pipeline. One end of the upstream slurry inlet pipeline is connected to the water inlet of the front pump shell, and the other end is sequentially connected to a slurry inlet pressure sensor, a slurry inlet flow meter, a slurry inlet pump and a pulp preparation tank. One end of the downstream slurry inlet pipeline is connected to the slurry inlet spiral drainage chamber of the front pump shell, and the other end is connected to the excavation cabin.

[0016] Further, the slurry inlet pipeline includes an upstream slurry inlet pipeline and a downstream slurry inlet pipeline. One end of the upstream slurry inlet pipeline is connected to the water inlet of the front pump shell, and the other end is sequentially connected to a slurry inlet pressure sensor, a slurry inlet flow meter, a slurry inlet pump and a pulp preparation tank. One end of the downstream slurry inlet pipeline is connected to the slurry inlet spiral drainage chamber of the front pump shell, and the other end is connected to the excavation cabin.

[0017] Further, the slurry inlet pipeline includes an upstream slurry inlet pipeline and a downstream slurry inlet pipeline. One end of the upstream slurry inlet pipeline is connected to the water inlet of the front pump shell, and the other end is sequentially connected to a slurry inlet pressure sensor, a slurry inlet flow meter, a slurry inlet pump and a pulp preparation tank. One end of the downstream slurry inlet pipeline is connected to the slurry inlet spiral drainage chamber of the front pump shell, and the other end is connected to the excavation cabin.

[0018] Further, an electrically controlled discharge overflow valve is further included, one end of which is connected to the spiral suction chamber of the rear pump shell, and the other end is connected to the pipeline between the discharge flow meter and the discharge downstream gate valve, a discharge pressure sensor is arranged at the discharge port of the rear pump shell, and the controller is electrically connected with the electrically controlled discharge overflow valve and the discharge pressure sensor, so as to open the electrically controlled discharge overflow valve to make the water slurry output from the discharge port circulate back to the spiral suction chamber of the rear pump shell when the detection value of the discharge pressure sensor is lower than the set value, and close the electrically controlled discharge overflow valve to make the water slurry output from the discharge port flow into the downstream discharge pipeline when the detection value of the discharge pressure sensor is greater than the set value.

[0019] Further, backup pressure reducing devices are arranged on the downstream slurry inlet pipeline and the upstream slurry discharge pipeline.

[0020] Further, the controller is specifically used for:

[0021] When the variable frequency motor enters the constant speed mode, the upstream slurry starts to impact the turbine impeller to reduce the pressure and generate torque for reducing the load of the variable frequency motor, with the reduction of the load and the power, the speed is first stabilized by adjusting the variable inertia flywheel inertia, and after the speed and power of the variable frequency motor are stabilized, the frequency and excitation strength of the variable frequency motor are then adjusted, and the electric proportional pressure regulating valve is adjusted to adjust the strength of the active jet flow to control the slurry inlet pressure of the slurry inlet turbine to control the speed and keep the slurry inlet turbine in the set working characteristic curve interval, and the flywheel inertia is adjusted at the set rate to return to the center, and the additional speed fluctuation caused by the change of the inertia is adjusted by the variable frequency motor and the active pressure reducing device to complete the constant speed control.

[0022] Further, the controller is specifically used for:

[0023] When the working is stable, the speed of the slurry inlet pump on the ground and the speed of the slurry discharge pump in the well are controlled to control the liquid level of the excavation cabin, at this time, the shaft power generated by the slurry inlet turbine is insufficient to completely support the operation of the slurry discharge pump, then the variable frequency motor is controlled to supplement the shaft power, and when it is necessary to change the slurry inlet and discharge flow to adjust the liquid level of the excavation cabin, the variable frequency motor is also controlled to adjust, and when the slurry inlet flow is greater than the slurry discharge flow, the variable frequency motor is used for resistance braking or reverse excitation brake to control the speed.

[0024] Further, the controller is specifically used for:

[0025] When the rotating speed suddenly changes, first, the variable inertia flywheel inertia is adjusted to stabilize the rotating speed to keep the slurry discharge flow stable and the slurry inlet turbine pressure reduction effect, then the frequency and excitation strength of the variable frequency motor are adjusted, and the electric proportional pressure regulating valve is adjusted to adjust the counter-attack strength of the active jet to control the slurry inlet turbine inlet pressure to control the rotating speed and keep the slurry inlet turbine in the set working characteristic curve interval, while the flywheel inertia is adjusted at the set rate to return to the center, and the additional rotating speed fluctuation caused by the inertia change is adjusted by the variable frequency motor and the active counter-attack pressure reducer to complete the constant rotating speed control.

[0026] Compared with the prior art, the application has the following beneficial effects:

[0027] The application provides a turbine motor pump set for a high-drop heading machine, which comprises a coaxial combined pump, a variable frequency motor, a slurry discharge pipeline, a slurry inlet pipeline, an active counter-attack pressure reducer and a counter-attack pressure reduction drainage port which are in communication with each other, a slurry inlet overflow valve which is arranged in parallel between a water inlet and a slurry spiral drainage chamber of the front pump shell, and a controller, the coaxial combined pump is arranged on a pump station base and comprises a transmission shaft, a rear pump shell, a pump body and a front pump shell, a middle part of the pump body is provided with an inter-impeller sealing ring, both sides of the inter-impeller sealing ring are provided with a turbine impeller and a pump impeller which are arranged in back-to-back rotation, the rear pump shell is provided with a spiral suction chamber and a drainage port and is sealingly connected with one side of the pump body to form a slurry discharge pump together with the pump impeller, the front pump shell is provided with a slurry spiral drainage chamber and a water inlet and is sealingly connected with the other side of the pump body to form a slurry inlet turbine together with the turbine impeller, both ends of the transmission shaft are rotatably supported by bearing boxes arranged on the pump station base and the middle part penetrates through the central holes of the rear pump shell, the pump body, the inter-impeller sealing ring and the front pump shell and is drivingly connected with the turbine impeller and the pump impeller, and the controller is connected with a rotating speed and torque sensor, the variable frequency motor, a slurry discharge flowmeter, a slurry inlet pressure sensor and a slurry inlet flowmeter circuit in an electric circuit manner and is used to control the inertia of the variable inertia flywheel and the rotating speed of the variable frequency motor according to the detection results of the rotating speed and torque sensor, the slurry discharge flowmeter, the slurry inlet pressure sensor and the slurry inlet flowmeter so that the slurry inlet turbine and the slurry discharge pump in the coaxial combined pump work in a high efficiency interval. Due to the adoption of the special coaxial combined pump, the variable frequency motor controller and the related sensors, on the one hand, the application avoids setting a complex movable guide vane mechanism in the mud environment for speed regulation, simplifies the structure and reduces the cost; on the other hand, the application does not need to occupy a relatively large pressure regulating well structure; thirdly, the application uses the variable inertia flywheel to respond to the flow change for constant rotating speed control, the control response is fast, the subsequent compensation is performed by the motor and the flywheel return structure is economical; fourthly, the turbine and the pump impeller of the application are coaxial and share a chamber, the sealing performance is good, the axial forces are offset by each other, the axial movement is small during work and the operation is stable; and fifthly, the shaft end dynamic seals of the application are all arranged in low pressure areas, the sealing pressure is small and the service life under the same structure design can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of this application, and of which specific embodiments will be described and illustrated by the accompanying drawings, are shown in:

[0029] Figure 1 is a schematic view of the pump group of the preferred embodiment of the present application.

[0030] Figure 2 is a schematic view of the hydraulic system of the preferred embodiment of the present application.

[0031] Figure 3 is a schematic view of the control system of the preferred embodiment of the present application.

[0032] In the figure: 1, shock-absorbing throat; 2, downstream slurry discharge pipeline; 3, variable inertia flywheel; 4, rotational speed and torque sensor; 5, variable frequency motor; 6, pipeline support; 7, slurry discharge tee; 8, counter-attack pressure relief drainage port; 9, coaxial combined pump; 91, rear pump shell; 92, pump body; 93, front pump shell; 94, transmission shaft; 10, downstream slurry inlet pipeline; 11, upstream slurry discharge pipeline; 12, first bearing box; 13, slurry inlet spiral drainage chamber; 14, active counter-attack pressure reducer; 15, turbine impeller; 16, inter-impeller sealing ring; 17, pump impeller; 18, spiral suction chamber; 19, second bearing box; 20, pump station base; 21, upstream slurry inlet pipeline; 22, slurry inlet flow meter; 23, slurry inlet pressure sensor; 24, slurry inlet upstream gate valve; 25, slurry inlet overflow valve; 26, backup counter-attack pressure reducer; 27, slurry inlet downstream gate valve; 28, slurry discharge upstream gate valve; 29, slurry discharge overflow valve; 30, slurry discharge pressure sensor; 31, slurry discharge downstream gate valve; 32, electric proportional pressure regulating valve; 33, slurry discharge flow meter; 34, circulating pump; 35, sedimentation tank; 36, slurry inlet pump; 37, pulp preparation tank. DETAILED DESCRIPTION

[0033] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] Reference Figure 1 and Figure 2 and Figure 3 The preferred embodiment of the present application provides a turbine motor pump group for a high-drop heading machine, comprising a coaxial combined pump 9, a variable frequency motor 5, a slurry discharge pipeline, a slurry inlet pipeline, an active counter-attack pressure reducer 14 and a counter-attack pressure relief drainage port 8 in communication with each other, a slurry inlet overflow valve 25, and a controller, wherein:

[0035] The coaxial combined pump 9 is arranged on the pump station base 20, and comprises a transmission shaft 94, a rear pump shell 91, a pump body 92, and a front pump shell 93. The middle part of the pump body 92 is provided with an impeller inter-seal ring 16, and the two sides of the impeller inter-seal ring 16 are provided with a turbine impeller 15 and a pump impeller 17 which are arranged in back-to-back rotation. The rear pump shell 91 is provided with a spiral suction chamber 18 and a drainage port, and is sealingly connected with one side of the pump body 92 to form a slurry discharge pump together with the pump impeller 17. The front pump shell 93 is provided with a slurry inlet spiral drainage chamber 13 and a water inlet, and is sealingly connected with the other side of the pump body 92 to form a slurry inlet turbine together with the turbine impeller 15. The transmission shaft 94 is rotatably supported by bearing boxes arranged on the pump station base 20 at both ends, and penetrates through the central holes of the rear pump shell 91, the pump body 92, the impeller inter-seal ring 16, and the front pump shell 93, and is drivingly connected with the turbine impeller 15 and the pump impeller 17. The bearing boxes include a first bearing box 12 and a second bearing box 19.

[0036] One end of the variable frequency motor 5 is connected with a variable inertia flywheel 3 through a shaft coupling provided with a rotating speed and torque sensor 4, and the other end is connected with the transmission shaft 94 through a shaft coupling. The variable frequency motor 5 and the variable inertia flywheel 3 are arranged on the pump station base 20.

[0037] The slurry discharge pipeline includes a downstream slurry discharge pipeline 2 and an upstream slurry discharge pipeline 11. One end of the downstream slurry discharge pipeline 2 is connected with the drainage port of the rear pump shell 91 through a slurry discharge tee joint 7, and the other end is sequentially connected with a slurry discharge flowmeter 33 and a sedimentation tank 35, which is also connected with a circulating pump 34. One end of the upstream slurry discharge pipeline 11 is connected with the spiral suction chamber 18 of the rear pump shell 91, and the other end is connected with a digging cabin.

[0038] The slurry inlet pipeline includes a downstream slurry inlet pipeline 10 and an upstream slurry inlet pipeline 21. The upstream slurry inlet pipeline 21 is fixed on the pump station base 20 by a pipeline support 6. One end of the upstream slurry inlet pipeline 21 is connected with the water inlet of the front pump shell 93, and the other end is sequentially connected with a slurry inlet pressure sensor 23, a slurry inlet flowmeter 22, a slurry inlet pump 36, and a pulp preparation tank 37. One end of the downstream slurry inlet pipeline 10 is connected with the slurry inlet spiral drainage chamber 13 of the front pump shell 93, and the other end is connected with the digging cabin.

[0039] The active counter-shock pressure reducer 14 is arranged at the water inlet of the front pump shell 93, and the counter-shock pressure reduction drainage port 8 is arranged at the drainage port of the rear pump shell 91 through one of the interfaces of the slurry discharge tee joint 7.

[0040] The slurry inlet overflow valve 25 is arranged in parallel between the water inlet and the slurry inlet spiral drainage chamber 13 of the front pump shell 93 through a bypass pipeline.

[0041] The controller is connected with the rotational speed and torque sensor 4, the variable frequency motor 5, the discharge pulp flow meter 33, the inlet pulp pressure sensor 23 and the inlet pulp flow meter 22 in circuit, respectively, for controlling the inertia of the variable inertia flywheel 3 and the rotational speed of the variable frequency motor 5 according to the detection results of the rotational speed and torque sensor 4, the discharge pulp flow meter 33, the inlet pulp pressure sensor 23 and the inlet pulp flow meter 22, so that the inlet pulp turbine and the discharge pump in the coaxial combination pump 9 work in the high efficiency interval.

[0042] The embodiment provides a turbine motor pump set for a high-fall heading machine, which comprises a coaxial combined pump 9, a variable frequency motor 5, a slurry discharge pipeline, a slurry inlet pipeline, a driving counter-shock pressure reducer 14 and a counter-shock pressure reduction drainage port 8 which are in communication with each other, a slurry inlet overflow valve 25 which is arranged in parallel between a water inlet and a slurry inlet spiral drainage chamber 13 of the front pump shell 93, and a controller, wherein the coaxial combined pump 9 is arranged on a pump station base 20 and comprises a transmission shaft 94, a rear pump shell 91, a pump body 92 and a front pump shell 93; a middle part of the pump body 92 is provided with an impeller inter-seal ring 16, both sides of the impeller inter-seal ring 16 are provided with a turbine impeller 15 and a pump impeller 17 which are arranged in back-to-back rotation mode, the rear pump shell 91 is provided with a spiral suction chamber 18 and a drainage port and is sealingly connected with one side of the pump body 92 to form a slurry discharge pump together with the pump impeller 17, the front pump shell 93 is provided with the slurry inlet spiral drainage chamber 13 and a water inlet and is sealingly connected with the other side of the pump body 92 to form a slurry inlet turbine together with the turbine impeller 15, both ends of the transmission shaft 94 are rotatably supported by bearing boxes arranged on the pump station base 20 and are arranged in the central holes of the rear pump shell 91, the pump body 92, the impeller inter-seal ring 16 and the front pump shell 93 and are drivingly connected with the turbine impeller 15 and the pump impeller 17; the controller is circuit-connected with a rotation speed and torque sensor 4, the variable frequency motor 5, a slurry discharge flow meter 33, a slurry inlet pressure sensor 23 and a slurry inlet flow meter 22 and is used for controlling the inertia of a variable inertia flywheel 3 and the rotation speed of the variable frequency motor 5 according to the detection results of the rotation speed and torque sensor 4, the slurry discharge flow meter 33, the slurry inlet pressure sensor 23 and the slurry inlet flow meter 22 so that the slurry inlet turbine and the slurry discharge pump in the coaxial combined pump 9 work in a high-efficiency range. Due to the adoption of the special coaxial combined pump 9, the variable frequency motor 5 controller and the related sensors, the embodiment has the following advantages: on the one hand, the complicated movable guide vane mechanism for speed regulation in the slurry environment is avoided, the structure is simplified and the cost is reduced; on the other hand, the embodiment does not need to occupy a relatively large pressure regulating well and other structures; thirdly, the variable inertia flywheel 3 is used to cope with the change of flow for constant rotation speed control, the control response is fast, the subsequent compensation is carried out by the motor and the flywheel and the structure economy is good; fourthly, the turbine impeller 15 and the pump impeller 17 of the embodiment are coaxial and share a chamber, the sealing performance is good, the mechanical transmission efficiency is high, the shaft rotation load is low, the torque transmission pressure required by the motor and the flywheel is small, the axial forces are offset to each other, the axial movement is small during work and the rotation is stable; fifthly, the shaft end dynamic seals of the embodiment are all arranged in low-pressure areas, the sealing pressure is small and the service life under the same structure design can be effectively improved, because the turbine impeller 15 and the pump impeller 17 are arranged in back-to-back mode, the shaft end dynamic seals are arranged on the pump suction side and the turbine outlet side, the fluid static pressure of the two positions is small, the sealing performance can be improved and the cost can be reduced, meanwhile, the high-pressure areas of the pump outlet and the turbine inlet are simply connected through the seals with flushing, the stop pressures on the two sides are mutually sealed as back pressures and the sealing is simple because the leakage amount is not important due to the working condition, so the sealing is simply arranged, the cost of setting the dynamic seal in the slurry environment is effectively reduced.

[0043] In the preferred embodiment of the present application, the turbine motor pump set for high-drop heading machine further comprises an electric proportional pressure regulating valve 32, an input end of the electric proportional pressure regulating valve 32 is connected with the drain port of the rear pump shell 91 through a pipeline, and an output end is connected with the water inlet of the front pump shell 93 through a pipeline.

[0044] In the preferred embodiment of the present application, the turbine motor pump set for high-drop heading machine further comprises a slurry inlet upstream gate valve 24 and a slurry inlet downstream gate valve 27, the slurry inlet upstream gate valve 24 is arranged on the upstream slurry inlet pipeline 21, and the slurry inlet downstream gate valve 27 is arranged on the downstream slurry inlet pipeline 10.

[0045] In the preferred embodiment of the present application, the turbine motor pump set for high-drop heading machine further comprises a slurry outlet downstream gate valve 31 and a slurry outlet upstream gate valve 28, the slurry outlet downstream gate valve 31 is arranged on the downstream slurry outlet pipeline 2, and the slurry outlet upstream gate valve 28 is arranged on the upstream slurry outlet pipeline 11.

[0046] In the preferred embodiment of the present application, a damping throat 1 is further arranged on the downstream slurry outlet pipeline 2, for reducing vibration of the downstream slurry outlet pipeline 2 during operation.

[0047] In the preferred embodiment of the present application, an electric control slurry overflow valve 29 is further included, one end of the electric control slurry overflow valve 29 is connected with the spiral suction chamber 18 of the rear pump shell 91, the other end is connected with a pipeline between the slurry outlet flowmeter 33 and the slurry outlet downstream gate valve 31, the drain port of the rear pump shell 91 is provided with a slurry outlet pressure sensor 30, and the controller is electrically connected with the electric control slurry overflow valve 29 and the slurry outlet pressure sensor 30, for opening the electric control slurry overflow valve 29 to make the water slurry output from the drain port circulate back to the spiral suction chamber 18 of the rear pump shell 91 when the detection value of the slurry outlet pressure sensor 30 is lower than the set value, and closing the electric control slurry overflow valve 29 to make the water slurry output from the drain port flow into the downstream slurry outlet pipeline 2 when the detection value of the slurry outlet pressure sensor 30 is greater than the set value.

[0048] In the preferred embodiment of the present application, the backup hedge pressure reducer 26 is arranged on the downstream slurry inlet pipeline 10 and the upstream slurry outlet pipeline 11.

[0049] In the preferred embodiment of the present application, the controller is specifically used for:

[0050] When the variable frequency motor 5 enters the constant speed mode, the upstream slurry starts to impact the turbine impeller 15 to reduce the pressure and generate torque for reducing the load of the variable frequency motor 5, with the reduction of the load, the power is reduced, first, the constant speed is stabilized by adjusting the inertia of the variable inertia flywheel 3, and after the speed and power of the variable frequency motor 5 are stabilized, then the frequency and excitation strength of the variable frequency motor 5 are adjusted, and the strength of the active jet is adjusted by adjusting the electric proportional pressure regulating valve 32 to control the slurry inlet pressure of the slurry turbine to control the speed and keep the slurry turbine in the set working characteristic curve interval, at the same time, the flywheel inertia is adjusted at the set rate to return to the center, and the additional speed fluctuation caused by the inertia change is adjusted by the variable frequency motor 5 and the active counter-impact pressure reducer 14 to complete the constant speed control.

[0051] In the preferred embodiment of the present application, the controller is specifically further used for:

[0052] When the working is stabilized, the liquid level of the excavation cabin is controlled by controlling the speed of the slurry inlet pump 36 located on the ground and the speed of the slurry outlet pump located in the well, at this time, the shaft power generated by the slurry turbine is not enough to completely support the operation of the slurry outlet pump, then the variable frequency motor 5 is controlled to supplement the shaft power, and when it is necessary to change the slurry inlet and outlet flow to adjust the liquid level of the excavation cabin, the variable frequency motor 5 is also controlled to adjust, and when the slurry inlet flow is greater than the slurry outlet flow, the speed is controlled by using the resistance braking or the reverse excitation brake of the variable frequency motor 5.

[0053] In the preferred embodiment of the present application, the controller is specifically further used for:

[0054] When the speed suddenly changes, first, the inertia of the variable inertia flywheel 3 is adjusted to stabilize the speed to keep the slurry outlet flow stable and the pressure reduction effect of the slurry turbine, then the frequency and excitation strength of the variable frequency motor 5 are adjusted, and the strength of the active jet is adjusted by adjusting the electric proportional pressure regulating valve 32 to control the slurry inlet pressure of the slurry turbine to control the speed and keep the slurry turbine in the set working characteristic curve interval, at the same time, the flywheel inertia is adjusted at the set rate to return to the center, and the additional speed fluctuation caused by the inertia change is adjusted by the variable frequency motor 5 and the active counter-impact pressure reducer 14 to complete the constant speed control.

[0055] In summary, the turbine motor pump set for high-drop heading machine provided by the above embodiment utilizes the turbine impeller 15 to regenerate and reduce pressure in order to recover energy to improve the operation economy of the slurry discharge pump, and at the same time, utilize the energy conversion to reduce the pressure of the medium due to gravity and convert it into shaft power to drive the coaxial pump impeller 17 to discharge slurry, so as to reduce the load of the variable frequency motor 5. At the same time, the required rotating speed can be obtained according to the set slurry discharge flow (the slurry discharge flow corresponds to the rotating speed of the slurry discharge pump), and the device is controlled at a constant rotating speed, so as to ensure that the required slurry discharge flow is achieved. When the shaft power of the slurry inlet load exceeds the shaft power required for slurry discharge, the motor is relied on to slow down, and then a part of the slurry discharge flow is actively shunted and actively counter-pressured, and the flow consumed (the valve opening degree is obtained by the system according to the required counter-pressure, and the set rotating speed of the slurry discharge pump is obtained by calculation) is further calculated by the system and increased to provide the set rotating speed of the slurry discharge pump, and this operation can reduce the motor brake load after stabilization; or when the shaft power provided by the slurry inlet load after passing through the turbine is insufficient, the variable frequency motor 5 provides the remaining shaft power to drive the slurry discharge pump to maintain a constant rotating speed, so that the slurry inlet turbine and the slurry discharge pump always work in the high efficiency interval.

[0056] The working process of the turbine motor pump set for high-drop heading machine provided by the above embodiment is as follows:

[0057] The slurry inlet upstream gate valve 24, the slurry inlet downstream gate valve 27, the slurry discharge upstream gate valve 28 and the electric proportional pressure regulating valve 32 are opened, the slurry inlet pump 36 is started, the rotating speed is adjusted so that the slurry inlet is slowly flooded to the slurry inlet upstream gate valve 24 and the slurry inlet downstream gate valve 27, and then the slurry inlet upstream gate valve 24, the slurry inlet downstream gate valve 27, the slurry discharge downstream gate valve 31 and the electric proportional pressure regulating valve 32 are closed, and the waiting for the slurry to flood the area above the turbine impeller 15 continues until the slurry inlet pipeline is full, during which the variable inertia flywheel 3 is adjusted to be at the inertia median position, the variable frequency motor 5 drives the turbine impeller 15, the pump impeller 17 and the variable inertia flywheel 3 are started, and when the rotating speed is rising, the controller makes the slurry discharge overflow valve 29 fully open according to the pressure value detected by the slurry discharge pressure sensor 30, and the slurry discharge pipeline enters the small circulation mode, at this time the slurry is circulated from the outlet of the slurry discharge pump, the slurry discharge overflow valve 29 back to the spiral suction chamber 18 of the slurry discharge pump.

[0058] After waiting for the slurry to fill the slurry inlet pipeline, the slurry inlet upstream gate valve 24 and the slurry inlet downstream gate valve 27 are opened at the same time, the controller makes the slurry discharge overflow valve 29 closed according to the pressure value detected by the slurry discharge pressure sensor 30, and returns to the normal mode of the preset pressure, at this time the upstream slurry starts to impact the turbine impeller 15 to reduce the pressure and generate torque for reducing the load of the variable frequency motor 5, at this time the motor enters the constant rotating speed mode, with the reduction of the load and the power, the rotating speed is quickly stabilized by adjusting the inertia of the variable inertia flywheel 3, and after the rotating speed and the power of the motor are stabilized, the rotating speed of the motor is fine-tuned or the effect of the active counter-pressure is adjusted by adjusting 32 to adjust the turbine slurry inlet pressure to return the inertia of the flywheel.

[0059] When emergency shutdown is required, the motor stops pumping (rotational speed is lower than the warning value), and the inlet slurry upstream gate valve 24 and the discharge slurry downstream gate valve 31 are quickly closed to protect the pump impeller 17 and the turbine impeller 15 of the inlet turbine, at this time, the upstream and downstream mud flows through the inlet overflow valve 25 and the discharge overflow valve 29 at full flow, and is dissipated by the passive counter-balance pressure reducer to prevent water hammer from causing damage to the pipe network.

[0060] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-head heading machine turbine motor pump set, characterized by, Comprise: Coaxial combination pump (9) is arranged on pump station base (20), including transmission shaft (94), rear pump shell (91), pump body (92), front pump shell (93), the middle part of the pump body (92) is provided with impeller inter-seal ring (16), the both sides of the impeller inter-seal ring (16) are back-to-back and are rotatably provided with turbine impeller (15) and pump impeller (17), the rear pump shell (91) is provided with spiral suction chamber (18) and drainage port and is sealedly connected with one side of the pump body (92) and is connected with pump impeller (17) after and constitutes discharge pump, the front pump shell (93) is provided with inlet spiral drainage chamber (13) and water inlet and is sealedly connected with the other side of the pump body (92) and is connected with turbine impeller (15) after and constitutes inlet turbine, the transmission shaft (94) both ends are rotatably supported by bearing box arranged on pump station base (20), the central hole is passed in rear pump shell (91), pump body (92), impeller inter-seal ring (16), front pump shell (93) and is drivenly connected with turbine impeller (15), pump impeller (17); Variable frequency motor (5), one end is connected with variable inertia flywheel (3) through the shaft coupling provided with speed and torque sensor (4), the other end is connected with transmission shaft (94) through the shaft coupling, the variable frequency motor (5) and variable inertia flywheel (3) are all arranged on pump station base (20); Discharge pipeline, including downstream discharge pipeline (2), upstream discharge pipeline (11), one end of the downstream discharge pipeline (2) is connected with the drainage port of rear pump shell (91) through discharge three-way (7), the other end is sequentially connected with discharge flowmeter (33), sedimentation tank (35);One end of the upstream discharge pipeline (11) is connected with the spiral suction chamber (18) of rear pump shell (91), the other end is connected with excavation cabin; Inlet pipeline, including downstream inlet pipeline (10), upstream inlet pipeline (21), one end of the upstream inlet pipeline (21) is connected with the water inlet of front pump shell (93), the other end is sequentially connected with inlet pressure sensor (23), inlet flowmeter (22), inlet pump (36) and pulp preparation tank (37), one end of the downstream inlet pipeline (10) is connected with the inlet spiral drainage chamber (13) of front pump shell (93), the other end is connected with excavation cabin; Active counter-shock pressure reducer (14) and counter-shock pressure reduction drainage port (8) are communicated, the active counter-shock pressure reducer (14) is arranged at the water inlet of front pump shell (93), the counter-shock pressure reduction drainage port (8) is arranged at the drainage port of rear pump shell (91) through one of the interfaces of discharge three-way (7); The water inlet and inlet spiral drainage chamber (13) of the front pump shell (93) are also provided with inlet overflow valve (25) in parallel through bypass pipeline; A controller is connected with the rotating speed and torque sensor (4), the variable frequency motor (5), the discharge slurry flow meter (33), the inlet slurry pressure sensor (23) and the inlet slurry flow meter (22) respectively, and is used for controlling the inertia of the variable inertia flywheel (3) and the rotating speed of the variable frequency motor (5) according to the detection results of the rotating speed and torque sensor (4), the discharge slurry flow meter (33), the inlet slurry pressure sensor (23) and the inlet slurry flow meter (22) so that the inlet slurry turbine and the discharge slurry pump in the coaxial combined pump (9) work in the high efficiency interval; the controller is specifically used for: when the variable frequency motor (5) enters the constant rotating speed mode, the upstream inlet slurry starts to impact the turbine impeller (15) to reduce the pressure and generate the torque for reducing the load of the variable frequency motor (5), with the reduction of the load and the power, the rotating speed is first stabilized by adjusting the inertia of the variable inertia flywheel (3), and then the frequency and the excitation strength of the variable frequency motor (5) are adjusted, and the electric proportional pressure regulating valve (32) is adjusted to adjust the counter-impact strength of the active jet flow to control the inlet slurry pressure of the inlet slurry turbine to control the rotating speed and keep the inlet slurry turbine in the set working characteristic curve interval, and the flywheel inertia is adjusted at the set rate to keep it in the middle, and the additional rotating speed fluctuation caused by the inertia change is adjusted by the variable frequency motor (5) and the active counter-impact pressure reducer (14) to complete the constant rotating speed control; the controller is specifically further used for: when the work is stable, the rotating speed of the inlet slurry pump (36) located on the ground and the rotating speed of the discharge slurry pump located in the well are controlled to control the liquid level of the excavation cabin, at this time, the shaft power generated by the inlet slurry turbine is not enough to completely support the operation of the discharge slurry pump, then the variable frequency motor (5) is controlled to supplement the shaft power, and when it is needed to change the inlet and discharge slurry flow to adjust the liquid level of the excavation cabin, the variable frequency motor (5) is also controlled to adjust, and when the inlet slurry flow is greater than the discharge slurry flow, the rotating speed is controlled by using the resistance braking or the reverse excitation brake of the variable frequency motor (5).

2. The turbine motor pump group for the high-drop heading machine according to claim 1, further comprising an electric proportional pressure regulating valve (32), an input end of the electric proportional pressure regulating valve (32) being connected with a drain port of the rear pump shell (91) through a pipeline, and an output end of the electric proportional pressure regulating valve (32) being connected with a water inlet of the front pump shell (93) through a pipeline. The turbine motor pump group further comprises an inlet slurry upstream gate valve (24) and an inlet slurry downstream gate valve (27), the inlet slurry upstream gate valve (24) being arranged on the upstream inlet slurry pipeline (21), and the inlet slurry downstream gate valve (27) being arranged on the downstream inlet slurry pipeline (10).

3. The high-head heading machine turbine motor pump set according to claim 2, characterized in that, The turbine motor pump group further comprises a discharge slurry downstream gate valve (31) and a discharge slurry upstream gate valve (28), the discharge slurry downstream gate valve (31) being arranged on the downstream discharge slurry pipeline (2), and the discharge slurry upstream gate valve (28) being arranged on the upstream discharge slurry pipeline (11).

4. The high-head development machine turbine motor pump set of claim 2, wherein, The downstream discharge slurry pipeline (2) is further provided with a shock absorption throat (1).

5. The high-head development machine turbine motor pump set of claim 2, wherein, 6. The turbine motor pump group for the high-drop heading machine according to claim 1, further comprising an electric proportional pressure regulating valve (32), an input end of the electric proportional pressure regulating valve (32) being connected with a drain port of the rear pump shell (91) through a pipeline, and an output end of the electric proportional pressure regulating valve (32) being connected with a water inlet of the front pump shell (93) through a pipeline. ​ The electric control discharge overflow valve (29) is connected to the spiral suction chamber (18) of the rear pump shell (91) at one end and connected to the pipeline between the discharge flow meter (33) and the discharge downstream gate valve (31) at the other end, the drain port of the rear pump shell (91) is provided with a discharge pressure sensor (30), the controller is circuit-connected with the electric control discharge overflow valve (29) and the discharge pressure sensor (30), and when the detection value of the discharge pressure sensor (30) is lower than the set value, the electric control discharge overflow valve (29) is opened to make the water slurry output from the drain port circulate back to the spiral suction chamber (18) of the rear pump shell (91) through the bypass pipeline, and when the detection value of the discharge pressure sensor (30) is greater than the set value, the electric control discharge overflow valve (29) is closed to make the water slurry output from the drain port flow into the downstream discharge pipeline (2).

7. The high-head development machine turbine motor pump set of claim 1, wherein, The backup counter-shock pressure reducer (26) is arranged on the downstream inlet pipeline (10) and the upstream discharge pipeline (11).

8. The high-head development machine turbine pump set of claim 1, wherein, The controller is further used for: When the rotating speed suddenly changes, first, the inertia of the variable inertia flywheel (3) is adjusted to stabilize the rotating speed to keep the discharge flow stable and the inlet turbine pressure reduction effect, then the frequency and excitation strength of the variable frequency motor (5) are adjusted, the electric proportional pressure regulating valve (32) is adjusted to adjust the counter-shock strength of the active jet flow to control the inlet turbine pressure and control the rotating speed, the inlet turbine is kept in the set working characteristic curve interval, the flywheel inertia is adjusted at the set rate to return to the center, the additional rotating speed fluctuation caused by the inertia change is adjusted by the variable frequency motor (5) and the active counter-shock pressure reducer (14) to complete the constant rotating speed control.

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