Pressurizing water supply system for mine

Abstract

The pressurization water supply system comprises a water supply pipe, a water return pipe, a water inlet control valve, a water return control valve, a test water pipe, a pressurization pump, a control system, a man-machine module, a pressure sensor, a current analog quantity water tank liquid level sensor, a current analog quantity pressure sensor, a communication module, a relay, a contactor and a servo motor module. The utility model has the beneficial effects that the water supply pressure of the water supply pipe can be ensured to be stable and adjustable, the response is quick, the construction cost and the maintenance cost are low, and various water supply pressure requirements can be responded at the same time; multi-term protection and state display can be carried out; the explosion-proof device can be used for stably working in an explosion-proof area in which explosive mixtures such as methane and coal dust exist within the altitude of 2000 meters, the environment temperature is-5 DEG C to 40 DEG C, the relative air humidity is 70%-120%, and gas or steam which destroys insulation does not exist; water or other liquid can be prevented from entering the electric control equipment of the pressurizing water supply system for the mine.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fluid control, especially relates to a mine pressure boosting water supply system. BACKGROUND

[0002] The pressure boosting water supply system is an important part of the explosion-proof area such as mine area and industrial area in production, and the stability of the pressure boosting water supply system is very important.

[0003] The traditional constant pressure water supply system is mainly controlled by the pump station, and the constant water pressure is maintained by adjusting the speed of the pump or increasing or decreasing the number of pumps. However, this pump-controlled constant pressure water supply system has some problems:

[0004] (1) The traditional pump-controlled constant pressure water supply system has a large dependence on the pump, and the running state of the pump directly affects the stability of the water supply pressure. If the pump fails or its performance decreases, the water supply pressure will be affected, which may lead to insufficient water supply or water pressure fluctuation.

[0005] (2) The traditional pump-controlled constant pressure water supply system adjusts the water pump according to the preset pressure value and real-time water demand. This pump adjustment method is not intelligent and dynamic enough. If the water demand suddenly increases, the water supply system cannot quickly respond and adjust accordingly, and the water demand cannot be met in time.

[0006] (3) In the traditional pump-controlled constant pressure water supply system, a set of pump only corresponds to control one water supply pressure. In the water supply working condition of multiple water supply pressures, multiple sets of pumps need to be set. Therefore, the pump-controlled constant pressure water supply system becomes complex because of the setting of multiple sets of pumps, and the construction cost and maintenance cost of the pump-controlled constant pressure water supply system are very high.

[0007] In summary, the traditional pump-controlled constant pressure water supply system has the problems of poor stability, slow response, complex system when multiple pressure demands exist, high construction cost and maintenance cost, etc. INVENTION CONTENTS

[0008] The utility model aims at overcoming the defects in the prior art, and provides a mine pressure boosting water supply system.

[0009] A mine pressure boosting water supply system, comprising: a water supply pipe, a return water pipe, a water inlet control valve, a return water control valve, a test water pipe, a pressure boosting pump, a control system, a man-machine module, a pressure sensor, a current analog water tank liquid level sensor, a current analog pressure sensor, a communication module, a relay, a contactor and a servo motor module;

[0010] The external water source outlet pipe is connected with the inlet of the booster pump, the outlet of the booster pump is connected with the inlet of the water supply pipe, the outlet of the water supply pipe has two branches, one of which is connected with the inlet of the backwater control valve, the outlet of the backwater control valve is connected with the backwater pipe, the other of which is connected with the inlet of the inlet control valve, the outlet of the inlet control valve is connected with the test water pipe, a plurality of branches are arranged on the test water pipe, one of which is connected with the pressure sensing interface of the pressure sensor, and the remaining test water pipe branches are all provided with constant pressure water output interfaces;

[0011] The control system is electrically connected with the man-machine module, the current analog water tank level sensor, the current analog pressure sensor, the pressure sensor, the inlet control valve, the backwater control valve and the booster pump; the control system is electrically connected with the servo motor module through the communication module; the servo motor module is electrically connected with the inlet control valve, the backwater control valve and the booster pump;

[0012] The man-machine module is used for providing input signals for the control system according to the buttons pressed by the user; the control system is used for processing the input signals and controlling the contactor and the relay through the output end, so as to control the booster pump, the inlet control valve and the backwater control valve;

[0013] The servo motor module is used for further controlling the opening degree of the inlet control valve and the backwater control valve according to the current analog water tank level sensor data and the current analog pressure sensor data provided by the control system; the servo motor module is used for adjusting the boosting size of the booster pump according to the pressure sensor data provided by the control system.

[0014] As preferred: a current transformer and an analog quantity conversion module are further arranged; the control system is electrically connected with the inlet control valve through the relay; the control system is electrically connected with the backwater control valve through the relay; the current analog water tank level sensor, the current analog pressure sensor and the current transformer are all electrically connected with the control system through the analog quantity conversion module; a contactor is further arranged between the control system and the current transformer; the control system is electrically connected with the booster pump through the contactor and the current transformer.

[0015] As preferred: an inlet valve sensor, a booster water supply control sensor and a pump suction empty protection sensor are further arranged; the inlet valve sensor is electrically connected with the inlet control valve and the control system; the booster water supply control sensor is electrically connected with the booster pump and the control system; the pump suction empty protection sensor is electrically connected with the booster pump and the control system, the inlet valve sensor is used for sending the parameters of the inlet control valve to the control system, the booster water supply control sensor is used for sending the parameters of the booster pump to the control system, and the pump suction empty protection sensor is used for monitoring whether the booster pump appears suction empty phenomenon in the running process and sending the same to the control system.

[0016] As preferred: a power supply unit is further provided; the power supply unit comprises a power module, an isolating switch, a main circuit fuse, a control transformer, a plurality of control circuit fuses, a contactor, a control power module and an AC / DC power module;

[0017] The external AC power source is electrically connected to the power module, the power module is electrically connected to the isolating switch, the isolating switch is electrically connected to the main circuit fuse, and the main circuit fuse is electrically connected to the control transformer; the control transformer is divided into multiple paths and is respectively:

[0018] The control circuit fuses are electrically connected to the control power module, and the control power module is electrically connected to the control system, and the control power module is used for supplying power to the control system;

[0019] The control circuit fuses are electrically connected to the AC / DC power module, the AC / DC power module is electrically connected to the water inlet control valve through a relay, and the AC / DC power module is also electrically connected to the water return control valve through a relay,

[0020] The contactor and the current transformer are electrically connected to the booster pump;

[0021] The isolating switch is used for on-off of the main circuit; the main circuit fuse is used for providing overcurrent protection; the control transformer is used for converting the external AC power source of AC 1140V into AC 220V; the control circuit fuse is used for providing overcurrent protection for branch circuits; the contactor is used for controlling start and stop of the booster pump; the current transformer is used for real-time monitoring of current of the booster pump, and guaranteeing safe operation of the booster pump; and the AC / DC power module is used for converting the AC 220V output by the control transformer into DC 24V, and is used for supplying power to the water inlet control valve and the water return control valve.

[0022] The beneficial effects of the utility model are:

[0023] The mine booster water supply system can guarantee that the water supply pipe has stable and adjustable water supply pressure, is fast in response, low in construction cost and maintenance cost, can simultaneously respond to multiple water supply pressure requirements, and can perform multiple protection and state display.

[0024] The mine booster water supply system can be used for stable work in an explosion-proof area (especially a mine area and a chemical industry area) with an altitude of 2000m, explosive mixtures such as methane and coal dust, an environmental temperature of-5℃ to 40℃, an air relative humidity of 70% to 120%, and a non-destructive insulation gas or steam, can prevent water or other liquids from being immersed into the electric control equipment inside the mine booster water supply system. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a power supply schematic diagram of the mine booster water supply system;

[0026] Figure 2 A control diagram of a booster water supply system for mines;

[0027] Figure 3 This is a schematic diagram of the circuit that converts current signals into digital signals in this utility model;

[0028] Figure 4 This is a power supply circuit diagram of the mine booster water supply system in the embodiment;

[0029] Figure 5 This is an interface circuit diagram of the control system in the embodiment;

[0030] Figure 6 This is a circuit that converts a current signal into a digital signal in the embodiment. Detailed Implementation

[0031] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0032] As one embodiment, a booster water supply system for mines, such as Figures 1 to 6 As shown, the system includes: a water supply pipe, a return water pipe, an inlet control valve (ball valve), a return water control valve (ball valve), a test water pipe, a booster pump (horizontal multi-stage centrifugal pump, power 37kW, rated voltage 660V / 1140V, rated current 32A), a control system, a human-machine module, a pressure sensor, an analog current water tank level sensor, an analog current pressure sensor, a communication module, relays, contactors, and a servo motor module (a pneumatic diaphragm actuator or an electric servo actuator). All these electronic components, including the control system, human-machine module, pressure sensor, analog current water tank level sensor, analog current pressure sensor, communication module, relays, and contactors, are housed within a mine-use explosion-proof and intrinsically safe operating box.

[0033] This mining explosion-proof and intrinsically safe control box has a rectangular outer shell and weighs 400kg. Its door is secured with bolts for quick opening. Electrical components and protective devices are mounted on a hinged core frame and the inner wall of the main chamber. Opening the door (note: power must be off before opening) reveals the control system (programmable logic controller), relays, power modules (intrinsically safe power supply), and leakage current interlocking devices on the hinged panel. The inner wall of the chamber contains AC vacuum contactors, main circuit fuses, control transformers, current transformers, and reversing disconnect switches. The main circuit connectors are located at the bottom of the chamber. Opening the hinged panel allows for maintenance of all components inside the control box.

[0034] The external water source outlet pipe is connected to the booster pump inlet, the booster pump outlet is connected to the water supply pipe inlet, the water supply pipe outlet has two branches, one of which is connected to the water return control valve inlet, the water return control valve outlet is connected to the water return pipe, and the other is connected to the water inlet control valve inlet, the water inlet control valve outlet is connected to the test water pipe, and a plurality of branches are provided on the test water pipe, one of which is connected to the pressure sensing interface of the pressure sensor, and the remaining test water pipe branches are provided with constant pressure water output interfaces;

[0035] The control system is electrically connected to the man-machine module, the current analog water tank level sensor, the current analog pressure sensor, the pressure sensor, the water inlet control valve, the water return control valve, and the booster pump; the control system is electrically connected to the servo motor module through the communication module (communication line); the servo motor module is electrically connected to the water inlet control valve, the water return control valve, and the booster pump;

[0036] The man-machine module is used to provide input signals to the control system according to the buttons pressed by the user (such as the user setting the required water pressure value through the man-machine interface); the control system can switch between local control and remote control through the switch knob; the control system is used to process the input signals and control the contactor and the relay through the output end, thereby controlling the booster pump, the water inlet control valve, and the water return control valve;

[0037] The servo motor module is used to further control the opening of the water inlet control valve and the water return control valve according to the current analog water tank level sensor data and the current analog pressure sensor data provided by the control system, so as to adjust the size of the water inlet flow and the water return flow; the servo motor module is used to adjust the pressure boost of the booster pump according to the pressure sensor data provided by the control system, so as to stabilize the pressure at the predetermined value set by the user;

[0038] A current transformer and an analog quantity conversion module are further provided; the control system is electrically connected to the water inlet control valve through the relay; the control system is electrically connected to the water return control valve through the relay; the current analog water tank level sensor, the current analog pressure sensor, and the current transformer are electrically connected to the control system through the analog quantity conversion module; a contactor is further provided between the control system and the current transformer; the control system is electrically connected to the booster pump through the contactor and the current transformer;

[0039] A water inlet valve sensor, a booster water supply control sensor, and a pump suction empty protection sensor are further provided; the water inlet valve sensor is electrically connected to the water inlet control valve and the control system; the booster water supply control sensor is electrically connected to the booster pump and the control system; the pump suction empty protection sensor is electrically connected to the booster pump and the control system, the water inlet valve sensor is used to send the parameters of the water inlet control valve to the control system, the booster water supply control sensor is used to send the parameters of the booster pump to the control system, and the pump suction empty protection sensor is used to monitor whether the booster pump appears suction empty phenomenon during operation and send the same to the control system.

[0040] The power supply unit comprises a power module, an isolating switch, a main circuit fuse, a control transformer, a plurality of control circuit fuses, a contactor, a control power module and an AC / DC power module;

[0041] The external AC power source is electrically connected to the power module, the power module is electrically connected to the isolating switch, the isolating switch is electrically connected to the main circuit fuse, and the main circuit fuse is electrically connected to the control transformer;

[0042] The control circuit fuses are electrically connected to the control power module, and the control power module is electrically connected to the control system, and the control power module is used for supplying power to the control system;

[0043] The AC / DC power module is electrically connected to the water inlet control valve and the water return control valve through relays,

[0044] The booster pump is electrically connected to the contactor and the current transformer;

[0045] The isolating switch is used for on-off of the main circuit, the main circuit fuse is used for providing overcurrent protection, the control transformer is used for converting the external AC power source of AC 1140V into AC 220V, the control circuit fuse is used for providing overcurrent protection for branch circuits, the contactor is used for controlling start and stop of the booster pump, the current transformer is used for real-time monitoring of current of the booster pump, and the AC / DC power module is used for converting the AC 220V output by the control transformer into DC 24V and for supplying power to the water inlet control valve and the water return control valve;

[0046] The booster water supply system for mines can be used in an explosion-proof area (especially a mine area and a chemical industry area) with an altitude of 2000 meters, explosive mixtures such as methane and coal dust, an environmental temperature of-5 DEG C to 40 DEG C, an air relative humidity of 70% to 120%, and non-destructive insulation gas or steam, and can prevent water or other liquids from being immersed into the electric control equipment of the booster water supply system for mines.

Claims

1. A mine pressurized water supply system characterized by, The utility model relates to a kind of water supply and drainage control system, including: Water supply pipe, return pipe, water inlet control valve, return control valve, test water pipe, booster pump, control system, man-machine module, pressure sensor, current analog water tank liquid level sensor, current analog pressure sensor, communication module, relay, contactor and servo motor module; External water source outlet pipe is connected with the inlet of the booster pump, the outlet of the booster pump is connected with the inlet of the water supply pipe, the outlet of the water supply pipe has two branches, one of which is connected with the inlet of the return control valve, the outlet of the return control valve is connected with the return pipe, and the other is connected with the inlet of the water inlet control valve, the outlet of the water inlet control valve is connected with the test water pipe, and a plurality of branches are provided on the test water pipe, one of which is connected with the pressure sensing interface of the pressure sensor, and the remaining test water pipe branches are provided with constant-pressure water output interface; The control system is electrically connected with the man-machine module, the current analog water tank liquid level sensor, the current analog pressure sensor, the pressure sensor, the water inlet control valve, the return control valve and the booster pump;The control system is electrically connected with the servo motor module through the communication module;The servo motor module is electrically connected with the water inlet control valve, the return control valve and the booster pump; The man-machine module is used to provide input signals for the control system according to the buttons pressed by the user;The control system is used to process the input signals and control the contactor and the relay through the output end, thereby controlling the booster pump, the water inlet control valve and the return control valve; The servo motor module is used to further control the opening degree of the water inlet control valve and the return control valve according to the current analog water tank liquid level sensor data and the current analog pressure sensor data provided by the control system;The servo motor module is used to adjust the boost size of the booster pump according to the pressure sensor data provided by the control system.

2. The mine pressurized water supply system according to claim 1, characterized by: A current transformer and an analog conversion module are also provided;The control system is electrically connected with the water inlet control valve through the relay;The control system is electrically connected with the return control valve through the relay;The current analog water tank liquid level sensor, the current analog pressure sensor and the current transformer are electrically connected with the control system through the analog conversion module;The control system and the current transformer are also provided with the contactor;The control system is electrically connected with the booster pump through the contactor and the current transformer.

3. The mine pressurized water supply system according to claim 2, characterized by: The water inlet valve sensor is electrically connected with the water inlet control valve and the control system; the booster water supply control sensor is electrically connected with the booster pump and the control system; and the pump suction empty protection sensor is electrically connected with the booster pump and the control system. The water inlet valve sensor is used to send parameters of the water inlet control valve to the control system; the booster water supply control sensor is used to send parameters of the booster pump to the control system; and the pump suction empty protection sensor is used to monitor whether the booster pump appears suction empty phenomenon during operation and send the same to the control system.

4. The mine pressurized water supply system according to claim 3, characterized by: The power supply unit includes a power module, an isolation switch, a main circuit fuse, a control transformer, a plurality of control circuit fuses, a contactor, a control power module and an AC / DC power module; The external AC power source is electrically connected with the power module; the power module is electrically connected with the isolation switch; the isolation switch is electrically connected with the main circuit fuse; and the main circuit fuse is electrically connected with the control transformer. The control transformer is divided into multiple paths and is respectively electrically connected with the control circuit fuses. The control circuit fuses are electrically connected with the control power module; the control power module is electrically connected with the control system; and the control power module is used to supply power for the control system. The control circuit fuses are electrically connected with the AC / DC power module; the AC / DC power module is electrically connected with the water inlet control valve through the relay; and the AC / DC power module is also electrically connected with the backwater control valve through the relay, The booster pump is electrically connected with the contactor and the current transformer; The isolation switch is used to turn on and off the main circuit; and the main circuit fuse is used to provide overcurrent protection. The control transformer is used to... AC 1140 V The external AC power supply is transformed and output as AC 220V; the control circuit fuse is used to provide overcurrent protection for the branch circuit; the contactor is used to control the start and stop of the booster pump; The current transformer is used for real-time monitoring of the current of the booster pump; the AC / DC power module is used for converting the output of the control transformer into 24V and supplying power to the water inlet control valve and the water return control valve. AC 220V into DC 24V, and is used to supply power to the water inlet control valve and the water return control valve.

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