Gravity type pressure relief door applied to gas inlet system of gas turbine under low-temperature condition

Abstract

The utility model discloses a gravity type pressure relief door applied to an air inlet system of a gas turbine under a low-temperature condition. The gravity type pressure relief door comprises a door frame 1, a door plate 2, a gravity arm 3, a counterweight assembly 4, a sealing rubber strip 5 and the like. The door frame is installed on the wall face of an air inlet system channel, the door plate is connected with the rotating shaft installation plate through the bearing, the gravity arm is connected with the door plate and the counterweight assembly, the counterweight assembly sets the pressure relief pressure value by adjusting the number of counterweight plates, and the sealing rubber strip ensures sealing during closing. The door plate is made of high-strength aluminum alloy materials, the sealing rubber strips are made of aging-resistant and high-pressure-resistant rubber materials, resistance heating wires are arranged in the sealing rubber strips, and the door frame is provided with a position switch. The pressure relief door is simple in structure, does not need extra electric drive, can effectively solve the problems of an existing pressure relief device, can normally play a role in a low-temperature environment, and has a good application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas turbine intake system safety equipment, concretely relates to the gravity type pressure relief door for gas turbine intake system. BACKGROUND

[0002] The gas turbine intake port is arranged outdoors and directly inhales atmosphere, under low temperature environment, the intake system often faces problems such as filter blockage and icing at the front of channel, which can cause abnormal increase of internal negative pressure of the system, and the excessively high negative pressure is extremely harmful, can damage the flow passage of the intake system, and even causes safety accidents, disturbs normal operation of the gas turbine and threatens the safety of the whole unit.

[0003] At present, the gas turbine intake system relies on pressure sensor to monitor pressure and alarms when abnormal, but low temperature can seriously affect the performance of the pressure sensor, so that it cannot work normally, and the pressure signal is usually led to the normal temperature zone for measurement by using a pressure lead pipe, which can cause abnormal pressure measurement. Therefore, it is necessary to add a pressure protection device to the intake channel, which can start to relieve pressure for the unit in time when the pressure in the flow passage abnormally increases and the sensor does not alarm in time, to prevent the equipment from being damaged due to overpressure.

[0004] The existing pressure relief device has defects, some electric pressure relief devices have complex structure, rely on external power for driving, increase equipment cost and maintenance difficulty, and can not work when power fails, some traditional pressure relief doors have poor sealing, are easy to leak during normal operation, affect the efficiency of the intake system, and cannot quickly and effectively relieve pressure when the pressure abnormally increases, so that the system pressure is too high, which brings hidden dangers to the intake system, therefore, the gas turbine intake system urgently needs a device with simple structure, reliability and good pressure relief effect. SUMMARY

[0005] The utility model aims at providing a gravity type pressure relief door applied to the gas turbine intake system under low temperature conditions to solve the problems of the existing pressure relief device proposed in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: a gravity type pressure relief door applied to the gas turbine intake system under low temperature conditions, comprising a door frame, a door plate, a gravity arm, a counterweight assembly and a sealing rubber strip.

[0007] The door frame is installed on the wall surface of the channel of the gas turbine intake system, the door frame is a rectangular frame structure, rubber strip mounting angle steels and pivot mounting plates are arranged on the door frame.

[0008] The door plate is a rectangular frame structure, pivots are arranged on both sides of the door plate, the door plate can rotate around the pivots through the bearing and the pivot mounting plate on the back side of the door frame.

[0009] The gravity arm is installed inside the door plate, and is used to connect the door plate and the counterweight assembly, and to adjust the opening torque of the pressure relief door by adjusting the length of the gravity arm.

[0010] The counterweight assembly is a box structure, and is installed at the tail end of the gravity arm.

[0011] The sealing rubber strip is in a P-shaped structure, and is arranged at the contact surface of the door plate and the door frame.

[0012] Further, the door plate is made of high-strength aluminum alloy material, which not only ensures sufficient strength, but also reduces the weight of the door plate.

[0013] Further, the counterweight plate is fixed inside the counterweight box through bolts, which facilitates the adjustment of the weight of the counterweight assembly according to actual requirements.

[0014] Further, the sealing rubber strip is made of rubber material that is resistant to aging and high pressure, and can ensure good sealing performance in long-term use and high-pressure environment.

[0015] Further, the sealing rubber strip is provided with an electric resistance heating wire in the internal space.

[0016] Further, the door frame is provided with three position switches (the number is greater than 1), and when all the switch signals are abnormal, it can be judged that the pressure inside the door position is abnormal, and at this time, the fuel engine shutdown instruction is triggered.

[0017] The working principle of the utility model is as follows: under the condition that the pressure of the gas turbine intake system is normal, the counterweight assembly relies on its own gravity to make the door plate tightly adhere to the door frame; at the same time, the sealing rubber strip plays a role to ensure excellent sealing effect and effectively prevent gas leakage.

[0018] When the gas turbine is in a running state and the intake port is blocked, the compressor continuously pumps air to make the system negative pressure rise sharply; when the negative pressure reaches the preset pressure relief door opening value, the atmospheric pressure overcomes the gravity of the counterweight assembly to push the door plate to rotate around the rotating shaft to open the pressure relief door, and triggers the position switch signal; after receiving the signal, the gas turbine stops according to the program, during which the outside atmosphere enters the system through the pressure relief door to make up for the gas loss caused by pumping, and ensures the smooth shutdown of the gas turbine. Advantages

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: it has a simple structure, adopts a gravity-based design, requires no additional electric drive system, reduces equipment cost and maintenance difficulty, and improves the reliability of the device.

[0020] The door panel is made of high-strength aluminum alloy and the rubber sealing strip is resistant to aging and high pressure, which improves the service life of the device.

[0021] The pressure relief value can be easily set by adjusting the length of the gravity arm and the weight of the counterweight plate, providing good flexibility and adaptability.

[0022] The sealing strip ensures good sealing of the pressure relief valve when it is closed, effectively preventing gas leakage and improving the working efficiency of the gas turbine intake system.

[0023] A resistance heating wire is laid inside the sealing strip; this can prevent the door panel and door frame from freezing at low temperatures, prevent the pressure relief door from failing to open properly, and ensure that the pressure relief door can function normally in low-temperature environments. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of one embodiment of the door frame in this utility model.

[0026] Figure 3 This is a schematic diagram of one embodiment of the door panel of this utility model.

[0027] Figure 4 This is a schematic diagram of one embodiment of the gravity arm in this utility model.

[0028] Figure 5 This is a schematic diagram of one embodiment of the counterweight component in this utility model.

[0029] Figure 6 This is a schematic diagram of an embodiment in which a heating resistance wire is laid inside the sealing strip in this utility model. Detailed Implementation

[0030] Example 1: As Figure 1 As shown, a gravity-type pressure relief door for a gas turbine intake system under low-temperature conditions includes a door frame (1), a door panel (2), a gravity arm (3), a counterweight assembly (4), and a sealing strip (5).

[0031] Further as Figure 1 As shown: First, the door frame (1) is accurately fixed on the channel wall (15) of the gas turbine intake system according to the design requirements to ensure that the installation is firm and the position is accurate.

[0032] Then, the door panel (2) is installed on the pivot mounting plate (7) of the door frame (1) through the bearing (9), so that the door panel (2) can rotate flexibly around the pivot (8).

[0033] Then, the gravity arm (3) is connected and fixed with the door panel (2) and the counterweight assembly (4) through bolts at both ends.

[0034] Then, the counterweight assembly (4) is installed at the tail end of the gravity arm (3) through bolts.

[0035] Then, the sealing rubber strip (5) is installed on the door frame (1) through the rubber strip pressing plate (12).

[0036] Finally, the position switch (13) is installed on the outer side of the door frame (1), and the signal contact is debugged to ensure that it can be triggered at the same time.

[0037] Further as shown in Figure 2 The door frame (1) is provided with a rubber strip mounting angle steel (6) and a pivot mounting plate (7).

[0038] Further as shown in Figure 3 The door panel (2) is provided with a pivot (8) on both sides.

[0039] Further as shown in Figure 4 The gravity arm (3) is a triangular cantilever composed of a profile.

[0040] Further as shown in Figure 5 The counterweight assembly (4) is a box structure, and the counterweight assembly (4) comprises a counterweight box (10) and a counterweight plate (11). According to the pre-calculated opening pressure value, a proper number of counterweight plates (11) are selected, and the counterweight plates (11) are fixedly installed in the counterweight box (10) through bolts.

[0041] Further as shown in Figure 6 The sealing rubber strip (5) is internally laid with a heating resistance wire (14).

[0042] In summary, the gravity type pressure relief door applied to the gas turbine inlet system has a good application prospect by virtue of the unique structure design, and effectively solves the problems existing in the existing pressure relief device.

[0043] It should be noted that the above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A gravity relief door for application to a gas turbine intake system under low temperature conditions, characterized in that, Including door frame (1), door board (2), gravity arm (3), counterweight assembly (4) and sealing rubber strip (5); The door frame (1) is installed on the passage wall surface (15) of gas turbine intake system, the door frame (1) is rectangular frame structure, is equipped with rubber strip mounting angle steel (6) and pivot mounting plate (7) on it;The door board (2) is rectangular frame structure, is equipped with pivot (8) on both sides of door board (2), is connected with the pivot mounting plate (7) of door frame back side through bearing (9), so that door board (2) can rotate around pivot (8);The gravity arm (3) is installed in the inner side of door board (2), is used to connect door board (2) and counterweight assembly (4), and the length of gravity arm (3) is adjusted to adjust the opening torque of pressure relief door;The counterweight assembly (4) is box type structure, is installed in the tail end of gravity arm (3), is equipped with connecting flange on both ends of counterweight box (10), is equipped with counterweight plate (11) in the inside of counterweight box (10), the number of counterweight plate (11) is adjusted to adjust the weight, and then the pressure value of pressure relief door opening is set;The sealing rubber strip (5) adopts P-shaped structure, is arranged at the contact surface of door board (2) and door frame (1), is used to ensure that pressure relief door has reliable sealing performance in the closed state.

2. A gravity unloader according to claim 1, applied to an intake system of a gas turbine under cryogenic conditions, characterized in that, The door board is made of high-strength aluminum alloy material.

3. A gravity unloader according to claim 1, applied to an intake system of a gas turbine under low temperature conditions, characterized in that, The counterweight plate is fixed in the counterweight box by bolts.

4. A gravity unloader according to claim 1, applied to an intake system of a gas turbine under low temperature conditions, characterized in that, The sealing rubber strip is made of aging-resistant and high-pressure-resistant rubber material.

5. A gravity unloader according to claim 1, applied to an intake system of a gas turbine under low temperature conditions, characterized in that, The sealing rubber strip is laid with resistance heating wire in the internal space.

6. A gravity unloader according to claim 1, applied to an intake system of a gas turbine under cryogenic conditions, characterized in that, The door frame is provided with more than one position switch.

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