CN204286725U - The online signal detecting equipment of gate valve - Google Patents

Abstract

An on-line hydraulic detection device for a gate valve comprises a PLC control system module, a man-machine interface module, a pressure adjustment module, a power module, a water tank, two pressure detection modules, a flow detection module, and an accumulator. Among them, the water tank, power module, pressure adjustment module, flow detection module, and accumulator are connected to each other in pairs through pipelines; the PLC control system module is connected to the power module, two pressure detection modules, flow detection module, and man-machine interface through circuits. . The utility model effectively overcomes the problem that the precision of the gate valve equipment used in the petrochemical industry, especially the nuclear power field, is generally not high. Not only that, but the detection equipment provided by the utility model has high efficiency, high efficiency, and Practical, low-cost and other characteristics can effectively reduce the testing time of technicians, while ensuring extremely high accuracy.

Description

Gate valve online hydraulic testing equipment

technical field

The utility model relates to a hydraulic detection device, in particular to a gate valve online hydraulic detection device.

Background technique

At present, my country's economy is developing rapidly, petrochemical industry and thermal power are widely used, and nuclear power has also begun to develop rapidly. These industries have extremely high requirements on production safety, and a slight negligence may cause huge safety hazards and lead to disastrous consequences. Gate valves are indispensable equipment in these industries, but at present, there are only test benches in China for the gate valves used in petrochemical, nuclear power, and thermal power pipelines before leaving the factory, and there is no pipeline system and The online leakage rate test of the gate valve also lacks specific data on the leakage of the pipeline gate valve before the equipment is put into production and after the overhaul, and there is a risk of leakage pollution and safety accidents caused by leakage. At the same time, other hydraulic testing equipment on the market cannot meet the high-precision, high-efficiency, and practical requirements for testing in these industries, and cannot guarantee the safety production requirements of these industries.

Utility model content

In order to solve the above problems, the utility model provides an online hydraulic detection device for gate valves, which includes a PLC control system module, a man-machine interface module, a pressure adjustment module, a power module, a water tank, two pressure detection modules, a flow detection module, and an energy storage device. Among them, the water tank, the power module, the pressure adjustment module, the flow detection module, and the accumulator are connected to each other in pairs through pipelines; among the two pressure detection modules, one end of one pressure detection module is connected to the flow detection module through a pipeline, and the other end is connected to the flow detection module through a pipeline. The system under test is connected, and another pressure detection module is connected with the accumulator through pipelines; the PLC control system is connected with the power module, two pressure detection modules, the flow detection module, and the man-machine interface module through circuits.

A ball valve and a one-way valve are arranged on the pipeline connected to the accumulator on one side of the power module. The function of the ball valve is to control the on-off of water; the function of the check valve is to prevent the pressure recoil of the external system from causing damage to the power module.

The above man-machine interface module is used for system information display and system control.

The above-mentioned power module pumps the water in the water tank into the equipment system.

The above-mentioned pressure adjustment module includes a throttle valve and a safety valve. By adjusting the opening of the throttle valve to control the water overflowing back to the water tank, the purpose of adjusting the external system pressure is achieved; the function of the safety valve is when the system pressure exceeds the set value. Relief from this valve to ensure system safety.

The above-mentioned accumulator contains an air-filled skin. When the power module presses the equipment system, the skin shrinks under pressure and stores a certain pressure. When the system pressure reaches the set pressure, the PLC control system module controls the power module to stop working. At this time, the compressed skin expands outwards to provide pressure to the equipment system to maintain the equipment system pressure.

The above-mentioned flow detection module includes a flow meter and an electric ball valve, and the flow meter is a small-range flow meter to measure the flow to the system under test. Electric ball valves include ball valves and electric actuators. When the leakage exceeds the set value, the PLC control system module controls the ball valve to open to protect the flow meter.

The above-mentioned two pressure detection modules contain pressure sensors, which are respectively used to monitor the pressure changes in the cork in the accumulator and the front end of the system under test.

The working principle of the utility model is: after starting the equipment, the system first discharges the gas in the equipment system pipeline, and then adjusts the pressure module to achieve the required test pressure. After the required test pressure is reached, the PLC control system controls the power module to stop working. At this time, the accumulator provides pressure guarantee for the equipment system, and the flow detection module detects the flow of liquid flowing into the detected system. At the same time, the flow detection module transmits the detected data to the PLC control system module. If the detected error rate is less than the preset error rate, the error rate is calculated by the PLC control system. If the detected error rate is greater than the preset error rate The error rate is calculated by the PLC control system according to the preset algorithm in the system to obtain the error rate.

The on-line hydraulic detection equipment for gate valves provided by the utility model effectively overcomes the problem that the precision of gate valve equipment used in petrochemical industries, especially nuclear power fields, is generally not high. Not only that, the detection equipment provided by the utility model is relatively Other similar products on the market also have the characteristics of high efficiency, practicality, and low cost, which can effectively reduce the testing time of technicians, and at the same time ensure extremely high accuracy.

Description of drawings

Fig. 1 is the equipment system block diagram of the present utility model;

Fig. 2 is the partial structural representation of the specific embodiment of the utility model equipment;

In Figure 2, 1 is a three-phase asynchronous motor; 2 is a high-pressure plunger pump; 3 is a safety valve; 4 is a throttle valve; 5 is a ball valve; 6 is a one-way valve; 7 is a ball valve; 8 is an accumulator; 9 is Electric ball valve, including ball valve and electric actuator; 10 is a small range flowmeter; 11 is a pressure transmitter; 12 is a quick connector; 13 is an unloading ball valve; 14 is a liquid level sensor; 15 is a water tank breather; 16 is Add water valve; 17 is a draining ball valve; 18 is a water tank; 19 is a ball valve; 20 is a pressure gauge.

Detailed ways

In order to better illustrate the utility model, the following will be described in detail in conjunction with the accompanying drawings.

As shown in Figure 1, a gate valve online hydraulic detection device provided by the utility model includes a PLC control system module, a man-machine interface module, a pressure adjustment module, a power module, a water tank, two pressure detection modules, a flow detection module, and an accumulator energy device. Among them, the water tank, the power module, the pressure adjustment module, the flow detection module, and the accumulator are connected to each other in pairs through pipelines; among the two pressure detection modules, one end of one pressure detection module is connected to the flow detection module through a pipeline, and the other end is connected to the flow detection module through a pipeline. The system under test is connected, and another pressure detection module is connected with the accumulator through a circuit; the PLC control system module is connected with the power module, two pressure detection modules, the flow detection module, and the human-machine interface through a circuit.

Ball valves 5, 7 and a one-way valve 6 are provided on the pipeline connected to the accumulator on one side of the power module. The function of ball valves 5 and 7 is to control the pressure to make water flow to the system; the function of check valve 6 is to prevent the pressure recoil of the external system from causing damage to the power module.

The above-mentioned power module includes a three-phase asynchronous motor 1 and a high-pressure plunger pump 2, which is used to pump water from the water tank 18 into the equipment system.

The above-mentioned pressure adjustment module includes a throttle valve 4 and a safety valve 3. By adjusting the opening of the throttle valve 4, the water overflowing back to the water tank is controlled to achieve the purpose of adjusting the external system pressure; the function of the safety valve 3 is to adjust the pressure of the system. When the set value is exceeded, the valve overflows to ensure the safety of the system.

The above-mentioned accumulator 8 contains an inflated skin. When the power module presses against the equipment system, the skin shrinks under pressure and stores a certain pressure. When the system pressure reaches the set pressure, the PLC control system module controls the power module to stop working. At this time, the compressed skin expands outwards to provide pressure to the equipment system to maintain the equipment system pressure.

The above-mentioned flow detection module includes a flow meter 10 and an electric ball valve 9. The flow meter 10 is a high-precision flow meter to measure the flow to the system under test. Electric ball valves include ball valves and electric actuators. When the leakage exceeds the set value, the PLC control system module controls the ball valve 9 to open, and the bypass is conducted to protect the flow meter 10 .

The above-mentioned two pressure detection modules contain pressure sensors 11, which are respectively used to monitor pressure changes in the skin in the accumulator and the front end of the system under test.

Throttle valve 13 and throttle valve 4 cooperate to adjust system pressure among Fig. 2, open after test and let system pressure leak back water tank; 14 is the effect of monitoring water tank liquid level for liquid level sensor.

The above-mentioned specific embodiments are only specific descriptions of the utility model, and should not be regarded as further limiting the utility model. Under the technical solution of the utility model, non-essential improvements made by those skilled in the art should fall within the protection scope of the utility model . ``

Claims (5)

1. A gate valve online hydraulic detection device, characterized in that: the detection device includes a PLC control system module, a man-machine interface module, a pressure adjustment module, a power module, a water tank, two pressure detection modules, a flow detection module, and an energy storage The water tank, the power module, the pressure adjustment module, the flow detection module, and the accumulator are connected to each other in pairs through pipelines; among the two pressure detection modules, one end of one pressure detection module is connected to the flow detection module through a pipeline, and the other end is connected to the flow detection module through a pipeline. The pipeline is connected to the system under test, and the other pressure detection module is connected to the accumulator through the pipeline; the PLC control module is connected to the power module, two pressure detection modules, the flow detection module, and the human-machine interface through circuits. 2. The online hydraulic detection device for gate valves according to claim 1, wherein the pressure adjustment module includes a throttle valve and a safety valve. 3. The on-line hydraulic pressure testing device for gate valves according to claim 1, characterized in that: said accumulator contains an air-filled skin. 4. The on-line hydraulic detection device for gate valves according to claim 1, wherein a ball valve and a check valve are provided on the pipeline connecting the power module side with the accumulator. 5. An online hydraulic detection device for gate valves according to claim 1, wherein the flow detection module includes a flow meter and an electric ball valve, wherein the electric ball valve further includes a ball valve and an electric actuator.