High-pressure water lifting system

Abstract

The invention discloses a high-pressure water lifting system which comprises a base, a plunger pump set connected in parallel is arranged on the base, a reduction gearbox is connected to the plunger pump set, a motor is connected to the reduction gearbox, and a cooling system and a lubricating system are connected to the plunger pump set and the motor. Due to the fact that the system can convey water in a low-altitude area to a high-altitude water shortage area with the altitude difference of 1200 m or above, the system is composed of a high-pressure large-flow plunger pump set, a reduction gearbox, a motor, a high-speed coupler, a low-speed coupler, a cooling system and a lubricating system which are all integrally installed on the same large base. A modular unit which is compact in structure and good in overall rigidity is formed, it is ensured that the hydraulic engineering function is reliably achieved, the intelligent control and fault diagnosis capacity is achieved, and the safety of the hydraulic engineering function is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water conservancy engineering, and in particular to a high-pressure water lifting system. BACKGROUND

[0002] In water conservancy engineering, it is often necessary to transport abundant water resources in low-elevation areas to water-deficient areas with a large elevation difference (usually more than 1200 meters) to meet the drinking water and irrigation needs of the area and ensure the function realization of water conservancy engineering. In this process, the water lifting system needs to overcome a huge water head loss while meeting the delivery requirements of large flow, which poses a high challenge to the overall performance of the water lifting system, including pump group power, pressure resistance, system stability, control accuracy, and energy efficiency. The water lifting system in the prior art often has problems such as insufficient power, low system integration, insufficient intelligent control, slow fault handling response, and the like when facing such high elevation difference and large flow requirements, and it is difficult to economically, efficiently, and stably complete the task of long-distance, high-lift, and large-flow water lifting. Therefore, it is of great practical significance and application value to develop a large-flow and high-power water lifting system that can adapt to the above harsh working conditions. SUMMARY

[0003] In view of the above defects or deficiencies, the purpose of the present application is to provide a high-pressure water lifting system.

[0004] To achieve the above purposes, the technical scheme of the present application is as follows: A high-pressure water lifting system, comprising: a base, a plunger pump group is arranged on the base and connected thereto, a speed reducer is connected to the plunger pump group, an electric motor is connected to the speed reducer, and a cooling system and a lubricating system are connected to the plunger pump group and the electric motor.

[0005] The plunger pump group comprises five water lifting pumps with a rated flow of 330m³ / h, a water supply manifold system, a drainage manifold system, and a central control system are arranged on the water lifting pumps.

[0006] The water supply manifold system comprises two centrifugal water supply pumps, the flow of the centrifugal water supply pumps is 1800m³ / h, the inlet of the centrifugal water supply pumps is connected to a water source pool, and the outlet mother pipe is connected to the suction valves of the high-pressure and large-flow plunger pumps in the five water lifting pumps through branch pipes, respectively, and electric ball valves or butterfly valves are installed on the outlet of the centrifugal water supply pumps, the inlets of the branch pipes, and the main pipeline.

[0007] A vibration sensor for monitoring vibration is installed on the bearing seat of the plunger pump group.

[0008] The central control system is provided with a fault automatic adjustment unit, which is used to automatically switch to a standby pump group when a fault is detected in one pump group and remind the staff to eliminate the fault.

[0009] The reduction gearbox is connected with the plunger pump group through a low-speed coupling, and the plunger pump group is connected with the motor through a high-speed coupling, wherein the high-speed coupling is of a BJS type, and the low-speed coupling is of a BJS type.

[0010] The motor is a 1600kW high-voltage energy-saving motor.

[0011] The lubricating system comprises an oil tank, an oil pump, a filter, a cooler and a distributor, and provides pressure lubricating oil for gear meshing pairs in the reduction gearbox, rolling bearings and bearings in the couplings, and monitors the pressure and temperature of the lubricating oil.

[0012] Compared with the prior art, the beneficial effects of the present application are: The present application provides a high-pressure water lifting system, which can transport water from a low-altitude area to a high-altitude water shortage area with an altitude difference of more than 1200m, and is composed of a high-pressure large-flow plunger pump group, a reduction gearbox, a motor, a high-speed coupling, a low-speed coupling, a cooling system and a lubricating system, and is integrated on the same large base to form a modular unit with compact structure and good overall rigidity, ensuring reliable realization of the water conservancy function and intelligent control and fault diagnosis capability, ensuring the safety of the water conservancy function.

[0013] Further, during the entire operation process of the large-flow high-power high-pressure water lifting system, the central control system continuously monitors the operation state of each water lifting pump group and auxiliary system. Once the intelligent diagnosis system finds that a water lifting pump group has a fault (for example, the motor temperature exceeds the standard, the pump body vibration is abnormal, the lubricating oil pressure is too low or the oil temperature is too high, etc.) by analyzing the monitoring data, the central control system immediately starts the corresponding protection mechanism: first, an explicit fault alarm signal is sent to remind the operation and maintenance personnel; second, the fault pump group is automatically controlled to stop, and the electric valves corresponding to the standby pump group (if the system is configured with an additional standby pump group) in the water supply manifold and the drainage manifold system are quickly opened, and the standby pump group is started to maintain the total water lifting flow of the entire system at the design value of 1320m³ / h, ensuring that the water supply to the high-altitude water shortage area is not significantly affected. If the system is not configured with an additional overall standby pump group, the central control system will optimize the load distribution of the remaining normally operating pump groups according to the fault condition, and send an alarm to prompt the staff to promptly troubleshoot and eliminate the fault, ensuring the working safety performance of the entire pump group. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a structural schematic view of the high-pressure water lifting system of the present application; Fig. 2 is a top view of the high-pressure water lifting system of the present application; Fig. 3 This is a schematic diagram of the plunger pump assembly structure of the high-pressure water lifting system of the present invention.

[0016] In the diagram, 1—cooling system; 2—plunger pump assembly; 3—low-speed coupling; 4—lubrication system; 5—gearbox; 6—high-speed coupling; 7—motor; 8—terminal box; 9—base. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the protection scope of the present invention.

[0019] like Figs. 1-3 As shown, this invention provides a high-pressure water lifting system with a design flow rate of 1320 m³ / h, used to transport water from low-altitude areas to high-altitude water-scarce areas with an elevation difference of over 1200 m to meet drinking water and irrigation needs. It includes: a base 9, on which a parallel plunger pump assembly 2 is mounted; a reduction gearbox 5 is connected to the plunger pump assembly; a motor 7 is connected to the reduction gearbox 5; and a cooling system 1 and a lubrication system 4 are connected to the plunger pump assembly and the motor 7.

[0020] Specifically, the plunger pump assembly 2 includes five water pumps with a rated flow rate of 330 m³ / h. Each water pump is equipped with a water supply manifold system, a drainage manifold system, and a central control system. The water supply manifold system includes two centrifugal water pumps with a flow rate of 1800 m³ / h. The inlet of each centrifugal water pump is connected to a water source tank, and the outlet main pipe is connected via branch pipes to the suction inlet of the high-pressure, high-flow plunger pump 2 among the five water pumps. Electric ball valves or butterfly valves are installed at the outlet of each centrifugal water pump, the inlet of each branch pipe, and on the main pipeline. Furthermore, vibration sensors for monitoring vibration are installed on the bearing housing of the plunger pump assembly 2.

[0021] Preferably, the central control system is equipped with an automatic fault adjustment unit, which is used to automatically switch to the standby pump unit when a fault is detected in a pump unit, and to remind the staff to troubleshoot the fault.

[0022] In addition, the gearbox 5 is connected to the plunger pump assembly via a low-speed coupling 3, and the plunger pump assembly is connected to the motor 7 via a high-speed coupling 6. The high-speed coupling 6 is of type BJS, and the low-speed coupling 3 is of type BJS.

[0023] The motor 7 is a 1600kW high-voltage energy-saving motor. The lubricating system 4 includes an oil tank, an oil pump, a filter, a cooler and a distributor, which provides pressure lubricating oil for gear meshing pairs in the reduction gearbox 5, rolling bearings and bearings in the shaft coupling, and monitors the pressure and temperature of the lubricating oil.

[0024] The water lifting pump group consists of five water lifting pumps with a rated flow of 330m³ / h, a water supply manifold system, a drainage manifold system and a central control system.

[0025] The high-pressure large-flow plunger pump group 2, the parallel gear reduction gearbox 5, the cooling system 1, the lubricating system 4 and the terminal box 8 matched with the motor are all integrated on the same base 9, forming a modular unit with compact structure and good overall rigidity. The high-speed shaft coupling 6 connects the output shaft of the 1600kW high-voltage energy-saving motor 7 with the input shaft of the reduction gearbox 5, and the low-speed shaft coupling 3 connects the output shaft of the reduction gearbox 5 with the input shaft of the high-pressure large-flow plunger pump 2, realizing efficient power transmission and speed matching. The cooling system 1 is used to cool the heating components in the water lifting pump group, especially the high-pressure large-flow plunger pump group 2 and the 1600kW high-voltage energy-saving motor 7, to ensure their operation at an appropriate temperature; the lubricating system 4 is used to provide continuous and clean lubricating oil to the gear and bearing etc. in the high-speed shaft coupling 6, the low-speed shaft coupling 3 and the parallel gear reduction gearbox 5, to reduce friction and wear and prolong the service life of the equipment.

[0026] The water supply manifold system consists of a water supply pump, an electric valve and corresponding pipelines, wherein the water supply pump is configured in a one active and one standby form to ensure the continuity and reliability of water supply to the water lifting pump group. The end of the water supply pipeline is connected to the water inlet of the plunger pump group 2 of the five water lifting pump groups, forming parallel water supply.

[0027] The drainage manifold system consists of an electric gate valve, a drainage branch pipe, a drainage main pipe and other auxiliary pipelines. The water outlet of the high-pressure large-flow plunger pump group 2 of each water lifting pump group is connected to a drainage branch pipe, and each drainage branch pipe is connected to the drainage main pipe, and the end of the drainage main pipe leads to the high-altitude water shortage area. The electric gate valve is arranged at the key position of each drainage branch pipe and the drainage main pipe, which is used to control the on-off and adjustment of water flow.

[0028] The central control system is configured to collect and monitor in real time a plurality of operating parameters of each water lifting pump group, including but not limited to: the water inlet pressure, the water outlet pressure, the pump body vibration value, the oil pressure and the oil temperature of the water lifting pump lubricating oil; the oil temperature and the oil pressure of the reduction box 5; the three-phase winding temperature of the 1600kW high-voltage energy-saving motor 7, and the front and rear bearing temperatures of the motor. At the same time, the central control system also has the function of centralized control of the opening and closing operations of all water lifting pump groups, the opening and closing operations of the water supply pumps in the water supply pipe system, and the opening and closing operations of all electric valves in the water supply pipe system and the drainage pipe system. More importantly, the central control system integrates an intelligent fault diagnosis module, which can make real-time self-judgment and early warning of various faults that may occur in the operation of the large-flow high-power high-pressure water lifting system according to the collected operating parameters, combined with the preset threshold and fault criterion.

[0029] The working principle of the large-flow high-power high-pressure water lifting system of the application is as follows: In the system starting stage, first, the central control system sends an instruction to open all necessary electric valves on the water supply pipe system and the drainage pipe system to ensure that the water flow channel is unobstructed. Secondly, the working water supply pump in the water supply pipe system is started (if the working pump fails, it is automatically switched to the standby water supply pump), and the water supply pump draws water from the water source pool, transports and distributes it to the water inlet of the plunger pump group 2 of the five parallel water lifting pump groups through the water supply pipe system. Then, the operator sends a one-key starting instruction through the central control system, and the five water lifting pump groups start in sequence or simultaneously according to the preset program. The high-speed power output by the 1600kW high-voltage energy-saving motor 7 is transmitted to the reduction box 5 through the high-speed coupling 6, and after the reduction box 5 is reduced in speed and increased in torque, the low-speed coupling 3 drives the plunger of the high-pressure large-flow plunger pump 2 to reciprocate, thereby pressurizing the water and discharging it through the water outlet of the high-pressure large-flow plunger pump 2. The high-pressure water discharged by each water lifting pump group is collected into the drainage main pipe through the respective drainage branch pipe, and finally transported to the designated high-altitude water shortage area by the drainage main pipe.

[0030] In the whole operation process of the large-flow, large-power and high-pressure water lifting system, the central control system continuously monitors the operation state of each water lifting pump group and auxiliary system. Once the intelligent diagnosis system finds that a water lifting pump group has a fault (for example, the motor temperature exceeds the standard, the pump body vibration is abnormal, the lubricating oil pressure is too low or the oil temperature is too high, etc.) through analyzing the monitoring data, the central control system immediately starts the corresponding protection mechanism: first, it sends out a clear fault alarm signal to remind the operation and maintenance personnel; second, it automatically controls the fault pump group to stop running, and quickly opens the electric valve corresponding to the standby pump group (if the system is configured with an additional standby pump group) in the water supply manifold and drainage manifold system, starts the standby pump group, so as to maintain the total water lifting flow of the whole system basically at the design value of 1320m³ / h, and to ensure that the water supply to the high-altitude water shortage area is not significantly affected. If the system is not configured with an additional overall standby pump group, the central control system will optimize the load distribution of the remaining normally operating pump groups according to the fault condition, and send out an alarm to prompt the staff to promptly troubleshoot and eliminate the fault.

[0031] It is obvious for those skilled in the art that the above specific factual examples are only preferred schemes of the present application, and thus any improvement or change made by those skilled in the art to some parts of the present application still embodies the principles of the present application and realizes the purposes of the present application, and thus falls within the scope of the present application.

Claims

1. A high-pressure water lifting system, characterized in that, include: A base (9) is provided with a parallel plunger pump assembly (2), a reduction gearbox (5) is connected to the plunger pump assembly, a motor (7) is connected to the reduction gearbox (5), and a cooling system (1) and a lubrication system (4) are connected to the plunger pump assembly and the motor (7).

2. The high-pressure water lifting system according to claim 1, characterized in that, The plunger pump set (2) includes: five water pumps with a rated flow rate of 330 m³ / h, and the water pumps are equipped with a water supply manifold system, a drainage manifold system and a central control system.

3. The high-pressure water lifting system according to claim 2, characterized in that, The water supply manifold system includes: two centrifugal water supply pumps with a flow rate of 1800 m³ / h. The inlet of the centrifugal water supply pump is connected to the water source tank, and the outlet main pipe is connected to the suction valve of the five centrifugal water supply pumps through branch pipes. Electric ball valves or butterfly valves are installed at the outlet of the centrifugal water supply pumps, the inlet of each branch pipe, and the main pipe.

4. The high-pressure water lifting system according to claim 3, characterized in that, The piston pump assembly (2) is equipped with a vibration sensor for monitoring vibration on the bearing housing.

5. The high-pressure water lifting system according to claim 3, characterized in that, The central control system is equipped with an automatic fault adjustment unit. When a fault is detected in a pump set, the system can automatically switch to the standby pump set and remind the staff to troubleshoot the fault.

6. The high-pressure water lifting system according to claim 1 or 2, characterized in that, The gearbox (5) is connected to the piston pump assembly via a low-speed coupling (3), and the piston pump assembly is connected to the motor (7) via a high-speed coupling (6). The high-speed coupling (6) is of type BJS, and the low-speed coupling (3) is of type BJS.

7. The high-pressure water lifting system according to claim 1, characterized in that, The motor (7) is a 1600kW high-voltage energy-saving motor.

8. The high-pressure water lifting system according to claim 1, characterized in that, The lubrication system (4) includes an oil tank, an oil pump, a filter, a cooler, and a distributor, which provides pressurized lubricating oil to the gear meshing pairs, rolling bearings, and bearings in the coupling within the gearbox (5), and monitors the pressure and temperature of the lubricating oil.

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