A method for using a subway tunnel fan limiting device

Abstract

The application discloses a use method of a subway tunnel fan limiting device, which comprises a fixing support, a hydraulic push rod and an eddy current sensor, the fixing support is arranged at the fan reinforcing rib position around the fan base, and the bottom of the fixing support is installed on the concrete foundation ground; the hydraulic push rod is installed on the fixing support, the telescopic end of the hydraulic push rod is abutted against the outside of the fan base through a push plate, and the hydraulic push rod is used for adjusting the vertical and horizontal positions of the fan; the fixing support is further provided with a positioning bolt and an eddy current sensor, and the eddy current sensor is used for measuring the displacement of the fan in X, Y and Z directions. The use method of the subway tunnel fan limiting device can guarantee the stable operation of the fan equipment, and the fan equipment can also stably operate in the case of earthquake, so that the ventilation of underground space in the emergency case is ensured, and valuable time for escape is provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of subway tunnels, in particular to a use method of a subway tunnel fan limiting device. BACKGROUND

[0002] At present, there are more than 260 subway lines in China, and more than 100,000 fan devices are installed in underground spaces. Generally, 6 large tunnel axial flow fans are installed at both ends of the fan of a station. During the starting process of the fan, the impeller rotates at high speed while spraying high-speed airflow, which causes a thrust in the opposite direction, resulting in the movement of the fan side. Long-term effect leads to the failure of the function of the damper. In addition, the dynamic balance accuracy of the impeller has vibration and displacement in X, Y and Z directions, which brings many hidden dangers to the safety of the subway tunnel. SUMMARY

[0003] The purpose of the present application is to provide a use method of a subway tunnel fan limiting device to solve the problems existing in the prior art, which can ensure the stable operation of the fan device, and also can operate stably in the case of earthquake, and protect the ventilation of underground space in emergency, providing valuable time for escape.

[0004] To achieve the above purpose, the present application provides the following scheme: the present application provides a use method of a subway tunnel fan limiting device, which comprises

[0005] A fixed support is arranged at the fan reinforcing rib position around the fan base, and the bottom of the fixed support is installed on the concrete foundation ground; and

[0006] A hydraulic push rod is installed on the fixed support, the extension end of the hydraulic push rod abuts against the outside of the fan base through a push plate, and the hydraulic push rod is used to adjust the vertical and horizontal positions of the fan; and

[0007] An eddy current sensor is also installed on the fixed support, and the eddy current sensor is used to measure the displacement of the fan in X, Y and Z directions.

[0008] Preferably, the distance between the position of the positioning screw and the fan is set to 5-10mm.

[0009] Preferably, the distance between the position of the eddy current sensor and the fan is set to 10-12mm.

[0010] Preferably, the distance between the position of the hydraulic push rod and the fan is set to 5-10mm.

[0011] The present application has the following beneficial technical effects compared with the prior art:

[0012] 1, this limiting device can measure the vibration value of the fan at the same time, if the X direction vibration indicates that the fan is not placed horizontally, the Y direction vibration indicates that the fan balance is a problem, and the Z direction vibration indicates that the fan blade is deformed.

[0013] 2, through the limiting device, the running state of the fan can be monitored in real time, and the airflow direction is ensured to be horizontal in and out, which is sprayed along a straight line and will not hit the air pipe to cause huge noise.

[0014] 3, all data collection and conversion are realized through the control module, the control module has self-diagnosis and early warning function, adopts internet of things module, matches self-developed touch screen, realizes internet of things function. Four kinds of group control modes are adopted: shift standby, same direction self-control, average distribution and on-demand distribution. When the system fails or the group communication fails, the system automatically starts. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 The schematic view of the front and rear sides of the fan for which the fan limiting device is installed;

[0017] Figure 2 The schematic view of the left and right sides of the fan for which the fan limiting device is installed;

[0018] Figure 3 The Figure 1 and Figure 2 structure schematic view of the fan limiting device at A in

[0019] Figure 4 The Figure 1 and Figure 2 structure schematic view of the fan limiting device at B in

[0020] Among them, 1 is a fixed support, 2 is a positioning bolt, 3 is an eddy current sensor, and 4 is a hydraulic push rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] The purpose of the present application is to provide a subway tunnel fan limiting device usage method to solve the above-mentioned problems existing in the prior art, which can ensure the stable operation of the fan equipment, and also can operate stably in the case of earthquake, and protect the ventilation of underground space in emergency, providing valuable time for escape.

[0023] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0024] As shown in the drawings, Figures 1-4 The present application provides a subway tunnel fan limiting device usage method, which comprises

[0025] A fixed support 1 is arranged at the fan reinforcing rib position around the fan base, and the bottom of the fixed support 1 is installed on the concrete foundation ground; and

[0026] A hydraulic push rod 4 is installed on the fixed support 1, the extension end of the hydraulic push rod 4 abuts against the outside of the fan base through a push plate, and the vertical and horizontal positions of the fan are adjusted through the extension stroke of the hydraulic push rod 4; and

[0027] An eddy current sensor 3 is also installed on the fixed support 1, and a positioning screw 2 and the eddy current sensor 3 are used to measure the displacement of the fan in X, Y and Z directions.

[0028] During the fan starting process, the fan generates displacement, the eddy current sensor 3 is used to measure the displacement of the fan in X, Y and Z directions, the eddy current sensor 3 transmits the measured information to the control system, the control system obtains the displacement value according to the curve through the output signal of the eddy current sensor 3; then the control system feeds back the displacement value information of the fan to the hydraulic push rod 4, the hydraulic push rod 4 adjusts the extension stroke according to the displacement value, so as to act on the fan and adjust the vertical and horizontal positions of the fan. The positioning screw 2 is screwed on the fixed support 1, and the positioning screw 2 is used to prevent the equipment from falling too much to damage the eddy current sensor 3.

[0029] In one embodiment, the distance between the positioning screw 2 and the fan is set to 5-10mm, the distance between the eddy current sensor 3 and the fan is set to 10-12mm, and the distance between the hydraulic push rod 4 and the fan is set to 5-10mm.

[0030] The function of the subway tunnel fan limiting device is that the fixed support 1 is fixed on the concrete foundation, the vertical and horizontal positions of the fan are adjusted by the hydraulic push rod 4, the displacement in X, Y and Z directions is measured by the eddy current sensor 3, and the stable position of the fan is maintained by feeding back the measured displacement to the hydraulic push rod 4.

[0031] The eddy current sensor 3 generates a voltage signal through the eddy current effect, and the gap between the probe end face and the fan is changed after being processed by the processor. The gap value is displayed through the instrument. If the gap exceeds 5mm, the hydraulic push rod 4 extends 5mm until the fan is stable. The above functions ensure the stable operation of the equipment,

[0032] Stable operation in earthquake conditions, ensuring ventilation of underground space in emergency situations, providing valuable time for escape; in the case of an earthquake, the fan is in an irregular shaking state, and the use of this device ensures smooth operation of the fan.

[0033] The working process of the subway tunnel fan limiting device is as follows: the eddy current sensor 3 outputs a signal connected to the control module through a shielded cable. The control module has self-diagnosis and early warning functions, uses an Internet of Things module, and matches a self-developed touch screen to realize Internet of Things functions. Four group control modes are adopted: rotation standby, same direction self-control, average distribution, and on-demand distribution. When the system fails or group communication fails, the device automatically starts. Each data is programmed on the touch screen, and the sensor is linearly corrected through configuration software.

[0034] It should be noted that for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, and any reference signs in the claims should not be regarded as limiting the claims.

[0035] In the present application, specific examples are applied to illustrate the principles and implementation modes of the present application. The above embodiment descriptions are only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the present description should not be understood as a limitation of the present application.

Claims

1. A method for using a limiting device for a subway tunnel fan, characterized in that: Subway tunnel ventilation fan limit device includes A fixed bracket is provided at the position of the fan reinforcing ribs around the fan base, and the bottom of the fixed bracket is installed on the concrete foundation ground. as well as A hydraulic push rod is mounted on the fixed bracket. The telescopic end of the hydraulic push rod abuts against the outside of the fan base via a push plate. The hydraulic push rod is used to adjust the vertical and horizontal position of the fan. An eddy current sensor is also provided on the fixed bracket, which is equipped with positioning bolts and an eddy current sensor. The eddy current sensor is used to measure the displacement of the fan in the X, Y, and Z directions. During the start-up process of the fan, the fan generates displacement. The eddy current sensor is used to measure the displacement of the fan in the X, Y, and Z directions. The eddy current sensor transmits the measured information to the control system. The control system obtains the displacement value based on the curve of the output signal of the eddy current sensor. Then, the control system feeds back the displacement value of the fan to the hydraulic push rod. The hydraulic push rod adjusts its extension stroke according to the displacement value, thereby acting on the fan to adjust the vertical and horizontal position of the fan. The function of the subway tunnel fan limiting device is as follows: the fixed bracket is fixed on the concrete foundation. The vertical and horizontal position of the fan is adjusted by the hydraulic push rod. The displacement in the X, Y, and Z directions is measured by the eddy current sensor. The measured displacement is fed back to the hydraulic push rod to maintain the stable position of the fan. The eddy current sensor, through the eddy current effect, generates a voltage signal after processing by the processor, which changes with the gap between the probe end face and the fan. The gap value is displayed by the instrument. If the gap exceeds 5mm, the hydraulic push rod extends 5mm until the fan is stable. The subway tunnel ventilation fan limiting device can measure the vibration value of the fan. If the fan vibrates in the X direction, the fan is not placed horizontally. If the fan vibrates in the Y direction, the fan has a balance problem. If the fan vibrates in the Z direction, the fan blades are deformed. The subway tunnel fan limiting device can monitor the fan's operating status in real time, while ensuring that the airflow direction is horizontal, and the airflow is sprayed out in a straight line, so as not to hit the air duct and cause huge noise. The positioning screw is screwed onto the fixed bracket. The positioning screw is used to prevent the device from tipping over too much and damaging the eddy current sensor. The positioning bolt is positioned 5-10 mm away from the fan, the eddy current sensor is positioned 10-12 mm away from the fan, and the hydraulic push rod is positioned 5-10 mm away from the fan.

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