Closed bulkhead gate device for pressure steel pipe explosion protection

Abstract

The utility model discloses a closed bulkhead gate device for pressure steel pipe blasting protection and relates to the field of hydraulic and hydroelectric engineering. The utility model discloses a closed bulkhead gate which comprises a closed bulkhead gate, a flow sensor, a servomotor, a hydraulic pipeline assembly, a high-level oil tank, an oil pressing station and a control valve assembly, and is characterized in that the closed bulkhead gate is arranged at an upstream inlet of a pressure steel pipe; the hydraulic pipeline assembly comprises a main oil supply pipeline, an auxiliary oil supply pipeline, an oil return pipeline and a closing pipeline, the closed bulkhead gate is connected with the servomotor in a direct connection mode, and the main oil supply pipeline is connected with a lower oil cavity of the servomotor; the high-level oil tank is arranged above the oil pressing station, and the high-level oil tank is connected with an upper oil cavity of the servomotor through an auxiliary oil supply pipeline, connected with the oil pressing station through an oil return pipeline and connected with the main oil supply pipeline through a closing pipeline; a control valve assembly is connected between the main oil supply pipeline and the oil pressing station. When the pressure steel pipe is exploded, the gate is closed in time, and personnel safety and surrounding safety are protected.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic and hydroelectric engineering, in particular to a closed flat gate device for protecting a penstock from explosion, which can close the gate in time to reduce losses when the penstock explodes. Background Art

[0002] In water conservancy, electricity, water supply and drainage projects, pressure steel pipes are widely used to transport fluids. However, due to various reasons, pressure steel pipes may face the risk of explosion, posing a serious threat to the safe operation of the entire system. Pressure steel pipe explosion will lead to fluid leakage, causing equipment damage, economic losses, and even threatening the personal safety of operators. Traditional flat gates can also achieve rapid emergency closure, but most of them are open-type designs and lack effective linkage control signals, which limits their functions. Summary of the invention

[0003] The utility model aims to solve the problem of explosion risk of pressure steel pipes during fluid transportation, and provides a closed flat gate device for protecting pressure steel pipes from explosion, which can close the gate in time to reduce losses when the pressure steel pipe explodes.

[0004] The utility model of a closed flat gate device for pressure steel pipe explosion protection is characterized in that the gate device includes a closed flat gate, a flow sensor, a relay, a hydraulic pipeline assembly, a high-level oil tank, an oil pressure station and a control valve assembly, the closed flat gate is arranged at the upstream inlet of the pressure steel pipe, the flow sensor is installed on the pressure steel pipe, the hydraulic pipeline assembly includes a main oil supply pipeline, an auxiliary oil supply pipeline, an oil return pipeline and a closing pipeline, the closed flat gate and the relay are connected in a direct connection manner, and the main oil supply pipeline is connected to the lower oil chamber of the relay; the high-level oil tank is arranged above the oil pressure station, and the high-level oil tank is connected to the upper oil chamber of the relay through the auxiliary oil supply pipeline, the oil pressure station through the return oil pipeline, and the main oil supply pipeline through the closing pipeline; the control valve assembly is connected between the main oil supply pipeline and the oil pressure station; wherein:

[0005] The control valve assembly includes a normally open control valve group and a normally closed control valve group, each of which is a group of normally open control valves and a group of closed control valves. The normally open control valve group includes a control valve, a throttle valve and a one-way valve installed on the oil pipe in sequence from bottom to top; the normally closed control valve group includes a control valve, a throttle valve and a one-way valve installed on the oil pipe in sequence from bottom to top; the throttle valve is used to control the speed of normal opening and normal closing of the gate;

[0006] The oil pressure station includes an oil supply tank, a high-pressure oil pump, and an oil filter. The oil supply tank is placed below the high-position oil tank. The oil filter is connected to the high-pressure oil pump through an oil supply pipeline. The oil pump outlet is connected to the normal opening control valve group.

[0007] A manual emergency shut-off valve and a pressure steel pipe burst protection control valve are provided on the emergency shut-off pipeline, and the pressure steel pipe burst protection control valve is connected to the flow sensor through a data line.

[0008] A pressure-bearing sealing ring is provided at the connection between the relay and the closed flat gate to prevent the pressurized water in the pressure steel pipe from entering the equipment installation and maintenance area during operation.

[0009] The hydraulic oil in the oil supply tank enters the high-pressure oil pump after passing through the oil filter. The generated high-pressure oil passes through the normal opening control valve group to the lower oil chamber of the relay, and the closed flat gate is opened by the relay. When the normal closing control valve group is opened, the sealing gate relies on its own gravity to press the hydraulic oil in the lower oil chamber of the relay back to the high-level oil tank, and at the same time closes the gate. When emergency closure is required, the manual emergency closing valve can be used for closing. When the pressure steel pipe ruptures, the pressure steel pipe flow is greater than the normal working flow. At this time, the flow sensor on the pressure steel pipe sends a signal, the pressure steel pipe burst protection control valve is activated, and the linkage control oil circuit is used to emergency close the gate; the high-level oil tank is used to replenish and receive the oil in the relay to ensure that the relay is full of oil and the stability of the oil supply. At the same time, the high-level oil tank is equipped with an oil overflow pipe to prevent the oil level and oil pressure from being too high.

[0010] The utility model of the closed flat gate device for penstock explosion protection has a scientific design and is easy to operate. When the penstock explodes, the gate is closed in time to avoid fluid leakage and equipment damage caused by pipeline rupture, which can effectively prevent the serious damage and danger caused by the explosion of the penstock, protect the life safety of personnel and the safety of surrounding facilities and the environment, thereby reducing economic losses, providing an additional protection mechanism for the penstock system, and increasing the reliability and stability of the entire system operation. Since the gate is outside the flow channel during normal operation, the water resistance of the valve can be reduced, and the power generation loss can be reduced for the power generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model.

[0012] Figure 2 It is a vertical view of the utility model.

[0013] Among them: closed flat gate 1, relay 2, hydraulic pipeline 3, high-level oil tank 4, normally open control valve group 5, normally closed control valve group 6, oil pressurizing station 7, manual emergency shut-off valve 8, pressure steel pipe burst protection control valve 9, flow sensor 10, control valve 11, throttle valve 12, one-way valve 13, oil supply tank 14, oil filter 15, high-pressure oil pump 16, pressure steel pipe 17. DETAILED DESCRIPTION

[0014] Embodiment 1: A closed flat gate device for explosion protection of a pressure steel pipe comprises a closed flat gate, a flow sensor, a servomotor, a hydraulic pipeline assembly, a high-level oil tank, an oil pressure station and a control valve assembly, wherein the closed flat gate is arranged at the upstream inlet of the pressure steel pipe, the flow sensor is installed on the pressure steel pipe, the hydraulic pipeline assembly comprises a main oil supply pipeline, an auxiliary oil supply pipeline, an oil return pipeline and a closing pipeline, the closed flat gate is connected to the servomotor in a direct connection manner, and the main oil supply pipeline is connected to the lower oil chamber of the servomotor; the high-level oil tank is arranged above the oil pressure station, and the high-level oil tank is connected to the upper oil chamber of the servomotor through the auxiliary oil supply pipeline, to the oil pressure station through the oil return pipeline, and to the main oil supply pipeline through the closing pipeline; the control valve assembly is connected between the main oil supply pipeline and the oil pressure station; wherein:

[0015] The control valve assembly includes a normally open control valve group and a normally closed control valve group, each of which is a group of normally open control valves and a group of closed control valves. The normally open control valve group includes a control valve, a throttle valve and a one-way valve installed on the oil pipe in sequence from bottom to top; the normally closed control valve group includes a control valve, a throttle valve and a one-way valve installed on the oil pipe in sequence from bottom to top; the throttle valve is used to control the speed of normal opening and normal closing of the gate;

[0016] The oil pressure station includes an oil supply tank, a high-pressure oil pump, and an oil filter. The oil supply tank is placed below the high-position oil tank. The oil filter is connected to the high-pressure oil pump through an oil supply pipeline. The oil pump outlet is connected to the normal opening control valve group.

[0017] A manual emergency shut-off valve and a pressure steel pipe burst protection control valve are provided on the emergency shut-off pipeline, and the pressure steel pipe burst protection control valve is connected to the flow sensor through a data line.

[0018] A pressure-bearing sealing ring is provided at the connection between the relay and the closed flat gate to prevent the pressurized water in the pressure steel pipe from entering the equipment installation and maintenance area during operation.

[0019] The hydraulic oil in the oil supply tank enters the high-pressure oil pump after passing through the oil filter. The generated high-pressure oil passes through the normal opening control valve group to the lower oil chamber of the relay, and the closed flat gate is opened by the relay. When the normal closing control valve group is opened, the sealing gate relies on its own gravity to press the hydraulic oil in the lower oil chamber of the relay back to the high-level oil tank, and at the same time closes the gate. When emergency closure is required, the manual emergency closing valve can be used for closing. When the pressure steel pipe ruptures, the pressure steel pipe flow is greater than the normal working flow. At this time, the flow sensor on the pressure steel pipe sends a signal, the pressure steel pipe burst protection control valve is activated, and the linkage control oil circuit is used to emergency close the gate; the high-level oil tank is used to replenish and receive the oil in the relay to ensure that the relay is full of oil and the stability of the oil supply. At the same time, the high-level oil tank is equipped with an oil overflow pipe to prevent the oil level and oil pressure from being too high.

[0020] The explosion protection control valve adopts a high oil pressure solenoid valve or a hydraulic control valve to achieve rapid opening and closing of the valve through external signals.

[0021] The action flow of opening and closing of closed flat gate is as follows:

[0022] 1) Normal opening of the closed flat gate: The closed flat gate is opened by driving the piston rod in the relay upward through the pressure oil. The high-pressure oil pump is filtered through the oil filter and absorbs the hydraulic oil in the oil supply tank. The hydraulic oil passes through the one-way valve and control valve of the normal opening control valve group to establish the operating oil pressure. The hydraulic oil reaches the lower chamber of the relay through the normal opening control valve group to open the closed flat gate. The normal opening control valve group is provided with a pipeline, on which the control valve and one-way valve installed on the oil pipe from bottom to top are installed. The oil pressure enters the lower oil chamber of the relay through the one-way valve to open the closed flat gate, and the upper chamber oil in the relay returns to the high-level oil tank; when the upper chamber oil completely returns to the high-level oil tank, the closed flat gate is fully opened; after the closed flat gate is opened, the high-pressure oil pump is turned off, and the closed flat gate is kept open by the oil pressure in the lower chamber of the servomotor;

[0023] 2) Normal closing of closed flat gate: The closed flat gate relies on its own gravity to drive the piston rod in the relay to move downward to realize the closing of the closed flat gate. When the piston rod moves downward, the hydraulic oil is squeezed out of the lower oil chamber, and the hydraulic oil returns to the high-level oil tank through the normally closed control valve group. The normally closed control valve group is equipped with a pipeline, including a control valve and a one-way valve installed on the oil pipe from bottom to top. The hydraulic oil returns to the high-level oil tank through the one-way valve of the normally closed control valve group. At the same time, the hydraulic oil in the high-level oil tank enters the upper chamber of the relay to replenish oil. When it is completely closed, the control valve of the normally closed control valve group is closed to stop the action of the closed flat gate;

[0024] 3) Manual emergency closing of closed flat gate: When the manual emergency closing valve is opened, the closed flat gate relies on its own gravity to drive the piston rod in the relay to move downward to close the closed flat gate. When the piston rod moves downward, the hydraulic oil is squeezed out of the lower oil chamber, and the oil returns directly to the high-level oil tank through the manual emergency closing valve, and the closed flat gate moves to full closure; during the process of emergency closing of the closed flat gate, the closed flat gate is closed at a relatively fast speed;

[0025] 4) Emergency closure of closed flat gate: When the closed flat gate is in the open state, if the pressure steel pipe ruptures, the flow in the pressure steel pipe is greater than the normal working flow, and the flow sensor on the pressure steel pipe sends an alarm signal. The signal is transmitted to the pressure steel pipe burst protection control valve through the data line. The pressure steel pipe burst protection control valve controls the emergency closing valve in conjunction with the emergency closing valve. After the emergency closing valve is actuated, the lower chamber of the relay is depressurized, and the closed flat gate relies on its own gravity to drive the piston rod in the relay to move downward to achieve the closing of the closed flat gate. When the piston rod moves downward, it squeezes the hydraulic oil out of the lower oil chamber, and the oil returns directly to the high-level oil tank through the pressure steel pipe burst protection valve, and the closed flat gate moves to full closure; during the emergency closing process of the closed flat gate, the closed flat gate is achieved at the fastest speed.

Claims

1. A closed flat gate device for penstock explosion protection, characterized in that The gate device includes a closed flat gate, a flow sensor, a relay, a hydraulic pipeline assembly, a high-level oil tank, an oil pressure station and a control valve assembly. The closed flat gate is arranged at the upstream inlet of the pressure steel pipe, the flow sensor is installed on the pressure steel pipe, the hydraulic pipeline assembly includes a main oil supply pipeline, an auxiliary oil supply pipeline, an oil return pipeline and a closing pipeline, the closed flat gate is connected to the relay in a direct connection mode, and the main oil supply pipeline is connected to the lower oil chamber of the relay; the high-level oil tank is arranged above the oil pressure station, and the high-level oil tank is connected to the upper oil chamber of the relay through the auxiliary oil supply pipeline, the oil pressure station through the oil return pipeline, and the main oil supply pipeline through the closing pipeline; the control valve assembly is connected between the main oil supply pipeline and the oil pressure station; wherein: The control valve assembly includes a normally open control valve group and a normally closed control valve group, each of which is a group of normally open control valves and a group of closed control valves. The normally open control valve group includes a control valve, a throttle valve and a one-way valve installed on the oil pipe in sequence from bottom to top; the normally closed control valve group includes a control valve, a throttle valve and a one-way valve installed on the oil pipe in sequence from bottom to top; the throttle valve is used to control the speed of normal opening and normal closing of the gate; The oil pressure station includes an oil supply tank, a high-pressure oil pump, and an oil filter. The oil supply tank is placed below the high-position oil tank. The oil filter is connected to the high-pressure oil pump through an oil supply pipeline. The oil pump outlet is connected to the normal opening control valve group. A manual emergency shut-off valve and a pressure steel pipe burst protection control valve are provided on the emergency shut-off pipeline, and the pressure steel pipe burst protection control valve is connected to the flow sensor through a data line.

2. The closed flat gate device for penstock explosion protection as claimed in claim 1, characterized in that A pressure-bearing sealing ring is arranged at the connection between the relay and the closed flat gate.

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