Air pipe type automatic sensing adjusting air valve for tunnel construction ventilation and using method of air pipe type automatic sensing adjusting air valve

Abstract

The invention belongs to the technical field of tunnel engineering, and particularly relates to an air pipe type automatic sensing adjusting air valve for tunnel construction ventilation and a using method. An air pipe type automatic sensing adjusting air valve for tunnel construction ventilation comprises an intelligent air valve body, the intelligent air valve body comprises an equipment shell, a fixed conical air cylinder is arranged in the equipment shell, a servo motor is arranged at the conical end in the fixed conical air cylinder, and the output end of the servo motor is connected with a movable conical air cylinder; a plurality of strip-shaped air belts are arranged on the cylinder wall of the fixed type conical air cylinder and the cylinder wall of the movable type conical air cylinder at equal intervals, the servo motor is connected with a programmable pulse generator, and the movable type conical air cylinder and the fixed type conical air cylinder move in a staggered mode under rotation of the servo motor to form an adjustable air opening. The voltage signal is converted into the torque and the rotating speed to drive the movable conical air duct, the device has the advantages of being small in time constant and high in linearity, and construction ventilation energy consumption and cost can be greatly saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel engineering, and in particular relates to an air duct type automatic sensing and regulating air valve for tunnel construction ventilation and a use method thereof. Background Art

[0002] At present, more and more mountain tunnels, municipal tunnels and submarine tunnels are developing in the direction of long distance and large section. For example, the Qingdao Jiaozhou Bay Tunnel has a total length of 7.797 kilometers. The Ma'anshan Tunnel, the controlling project of the G5 Beijing-Kunming Expressway Chengdu-Mianyang expansion project under construction, has a maximum excavation section of 257.05 square meters. In addition, there are 16 tunnels with a length of more than 20 kilometers and 6 tunnels with a length of more than 30 kilometers on a certain railway under construction in the west. Faced with so many super-long tunnels, the problem of construction ventilation becomes particularly difficult. Usually, in the construction of railway or highway tunnels, ventilation of single-head tunnels exceeding 5 kilometers becomes very difficult. On this railway line The longest single-head ventilation distance reaches 7.7 kilometers. For the ventilation problem of long and large tunnels, single-head pressure-in type, air channel type, air channel + air bin type and single-head pressure-in type + tunnel type ventilation schemes are often used. In the aforementioned schemes, in order to save fan energy consumption, when one fan ventilates two faces, the requirements for air volume and air pressure are inconsistent because the construction procedures of the two faces are not consistent at the same time. At this time, air valves are installed on the air duct to adjust the air volume and air pressure of the two working faces, so as to achieve the purpose of reasonable air volume allocation. At present, the most common air valves are split-open type, blade left-right rotating type, blade up-and-down rotating type, shutter type and mechanical shutter type, such as the Chinese patent CN Type 209146362 U "An Electric Air Valve" discloses an electric air valve, including an air valve body and a valve plate. The air valve body and the valve plate are welded, and the valve plate includes a fixed valve plate and an adjusting valve plate. A fixed bracket is provided at the upper end of the air valve body, and a mounting groove for a motor and a travel switch is provided on the fixed bracket. Fan-shaped blades are evenly arranged on the fixed valve plate and the adjusting valve plate.

[0003] In the process of implementing the embodiments of the present invention, the inventors found that there are at least the following problems in the background technology: (1) In actual use, various types of dampers currently have large wind resistance, small wind passing area, inflexible wind shield adjustment, large air leakage rate under high wind pressure, and the entire damper is relatively heavy, requiring special long anchor cables to be installed; (2) The air volume is adjusted by a simple motor driving the blades to adjust the opening and closing angles. The specific opening and closing angles are manually controlled, and the air volume and air pressure passing through the air valve cannot be accurately sensed; (3) It is difficult to access the intelligent ventilation control system, which requires special modifications and increases the overall ventilation cost.

[0004] Therefore, it is necessary to propose a duct-type automatic sensing and regulating air valve for tunnel construction ventilation to solve the above problems. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a duct-type automatic sensing and regulating air valve for tunnel construction ventilation and a method of use. The air valve equipment has a simple principle and structure, is easy to install, and has fully intelligent air volume and air pressure control. It drives the movable conical air duct by converting voltage signals into torque and speed. It has the characteristics of small time constant and high linearity, and can greatly save construction ventilation energy consumption and cost.

[0006] The technical solution of the present invention is: a duct-type automatic sensing and regulating air valve for tunnel construction ventilation, comprising an intelligent air valve, flange interfaces are respectively provided at both ends of the intelligent air valve, the intelligent air valve is connected to the air duct through the flange interface, the intelligent air valve comprises an equipment housing, a fixed conical air cylinder is provided in the equipment housing, a servo motor is provided at the conical end inside the fixed conical air cylinder, the output end of the servo motor is connected to a movable conical air cylinder, the movable conical air cylinder is located inside the fixed conical air cylinder, a plurality of strip wind belts are equidistantly provided on the cylinder walls of the fixed conical air cylinder and the movable conical air cylinder, the servo motor is connected to an explosion-proof cable, a programmable pulse generator is connected to the end of the explosion-proof cable, and the movable conical air cylinder is displaced and moved with the fixed conical air cylinder under the rotation of the servo motor to form an adjustable air outlet.

[0007] The space formed by the device housing and the fixed conical wind tube near the servo motor is an air inlet, and the space formed away from the servo motor is an air outlet. A plurality of wind speed and pressure sensors are arranged in the device housing on the air outlet side.

[0008] The wind speed and wind pressure sensors are provided with four, and are symmetrically arranged in the same cross section inside the device housing.

[0009] Mounting plates are provided at both ends of the upper outer side of the device housing, and a plurality of expansion bolts are provided on the mounting plates. A wiring terminal is provided at the middle position of the upper outer side of the device housing, one end of the wiring terminal is electrically connected to the explosion-proof cable, and the other end is electrically connected to the servo motor through a wire.

[0010] Motor supports are respectively provided at the upper and lower sides of the inner conical end of the fixed conical air cylinder, and the servo motor is fixedly installed between the motor supports.

[0011] The central axis of the movable conical wind tube coincides with that of the fixed conical wind tube. A plurality of sealing belts are arranged on the inner side of the wall of the fixed conical wind tube, and the sealing belts are used to seal the gap between the fixed conical wind tube and the movable conical wind tube.

[0012] The programmable pulse generator is fixedly installed on the tunnel lining side wall at a position 1.5 meters away from the tunnel bottom plate.

[0013] A method for using an air duct type automatic sensing and regulating air valve for tunnel construction ventilation comprises the following steps: S1: Hoist the smart air valve to the designed position, and install expansion bolts at the contact position between the installation plate of the smart air valve and the tunnel lining to fix the smart air valve; S2: Connect the smart air valve to the air duct through the flange interface; S3: Install a programmable pulse generator at a position 1.5m away from the bottom plate on the side wall of the tunnel lining, and connect it to the wiring terminal of the intelligent air valve using an explosion-proof cable; S4: Turn on the fan outside the cave, control the rotation angle and torque of the servo motor through the programmable pulse generator, and use the wind speed and pressure sensor to test the wind speed and pressure at the air outlet of the intelligent air valve; S5: By recording the fan power W, the wind speed V and wind pressure U at the fan outlet, the wind speed V and wind pressure U at the smart air valve outlet, the smart air valve opening and closing angle α, and the signal voltage M of the servo motor, the smart air valve is machine learned and corrected. After on-site adjustment, the above data are used to obtain the relationship curve and fitting curve among α, M, V, and U. The results are input into the programmable pulse generator to automatically sense and adjust the air volume and air pressure, and adjust according to usage requirements.

[0014] The technical effects of the present invention are: 1. The present invention drives the fixed conical wind duct and the movable conical wind duct to rotate at a certain angle through a servo motor connected to a programmable pulse generator to achieve the purpose of controlling the ventilation air volume and air pressure. During the control process, the air valve drives the movable conical wind duct with the voltage signal torque and rotation speed, and has the characteristics of small time constant and high linearity; 2. The air valve equipment of the present invention has a simple principle and structure, is easy to install, and has fully intelligent air volume and air pressure control, which can greatly save construction ventilation energy consumption and cost.

[0015] The following is a further description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a general layout diagram of an air duct type automatic sensing and regulating air valve for tunnel construction ventilation according to an embodiment of the present invention.

[0017] Figure 2 This is a diagram of the internal composition of an air duct type automatic sensing and regulating air valve used for tunnel construction ventilation according to an embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional view of an air duct type automatic sensing and regulating air valve for tunnel construction ventilation according to an embodiment of the present invention.

[0019] Figure 4 It is a longitudinal cross-sectional view of a conical air duct according to an embodiment of the present invention.

[0020] Figure 5 Schematic diagram of a fixed conical air duct according to an embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of a movable conical air duct according to an embodiment of the present invention.

[0022] Figure numerals: 1-intelligent air valve; 101-equipment housing; 102-air inlet; 103-air outlet; 104-terminal; 105-mounting plate; 106-expansion bolt; 2-air duct; 3-flange interface; 4-programmable pulse generator; 401-explosion-proof cable; 5-servo motor; 501-motor support; 6-fixed conical air duct; 601-movable conical air duct; 602-adjustable air outlet; 603-sealing belt; 604-strip wind belt; 7-wind speed and pressure sensor. Implementation

[0023] Example 1 Figure 1 to Figure 6 As shown, a duct type automatic sensing and regulating air valve for tunnel construction ventilation comprises an intelligent air valve 1, flange interfaces 3 are respectively provided at both ends of the intelligent air valve 1, the intelligent air valve 1 is connected to the air duct 2 through the flange interface 3, the intelligent air valve 1 comprises an equipment housing 101, a fixed conical air cylinder 6 is provided in the equipment housing 101, a servo motor 5 is provided at the conical end inside the fixed conical air cylinder 6, an output end of the servo motor 5 is connected to a movable conical air cylinder 601, the movable conical air cylinder 601 is located inside the fixed conical air cylinder 6, a plurality of strip wind belts 604 are equidistantly provided on the cylinder walls of the fixed conical air cylinder 6 and the movable conical air cylinder 601, the servo motor 5 is connected to an explosion-proof cable 401, a programmable pulse generator 4 is connected to the end of the explosion-proof cable 401, and the movable conical air cylinder 601 is displaced and moved with the fixed conical air cylinder 6 under the rotation of the servo motor 5 to form an adjustable air outlet 602.

[0024] During actual use, the present invention drives the fixed conical wind duct 6 and the movable conical wind duct 601 to rotate at a certain angle through the servo motor 5 connected to the programmable pulse generator 4 to achieve the purpose of controlling the ventilation air volume and air pressure. During the control process, the air valve drives the movable conical wind duct 601 with the voltage signal torque and rotation speed, and has the characteristics of small time constant and high linearity. The air valve equipment of the present invention has a simple structure and convenient installation, and the air volume and air pressure control is fully intelligent, which can greatly save construction ventilation energy consumption and cost.

[0025] Embodiment 2 Preferably, on the basis of Embodiment 1, in this embodiment, the space formed by the device housing 101 and the fixed conical wind tube 6 on the side close to the servo motor 5 is the air inlet 102, and the space formed on the side away from the servo motor 5 is the air outlet 103, and a plurality of wind speed and pressure sensors 7 are arranged in the device housing 101 on the side of the air outlet 103.

[0026] During actual use, a plurality of wind speed and wind pressure sensors 7 are provided in the device housing 101 on one side of the air outlet 103 of the present invention, for detecting the wind speed and wind pressure of the air outlet 103 of the intelligent air valve 1 .

[0027] Embodiment 3 Preferably, based on Embodiment 1 or Embodiment 2, in this embodiment, four wind speed and wind pressure sensors 7 are provided, which are symmetrically arranged vertically and horizontally in the same cross section inside the device housing 101 .

[0028] In actual use, the wind speed and wind pressure sensors 7 of the present invention are provided with four, which are symmetrically arranged up and down and left and right on the same cross section inside the device housing 101 to ensure accurate wind speed and wind pressure detection.

[0029] Embodiment 4 Preferably, on the basis of Embodiment 1 or Embodiment 3, in this embodiment, mounting plates 105 are respectively provided at both ends of the upper outer side of the device housing 101, and a plurality of expansion bolts 106 are provided on the mounting plates 105. A wiring terminal 104 is provided at the middle position of the upper outer side of the device housing 101, and one end of the wiring terminal 104 is electrically connected to the explosion-proof cable 401, and the other end is electrically connected to the servo motor 5 through a wire.

[0030] During actual use, mounting plates 105 are provided at both ends of the upper outer side of the device housing 101 of the present invention, and a plurality of expansion bolts 106 are provided on the mounting plates 105. Expansion bolts 106 are installed by drilling holes at the contact position between the mounting plates 105 and the tunnel lining to fix the intelligent air valve 1.

[0031] Embodiment 5 Preferably, based on Embodiment 1 or Embodiment 4, in this embodiment, motor supports 501 are respectively provided on upper and lower sides of the inner conical end of the fixed conical air cylinder 6 , and the servo motor 5 is fixedly installed between the motor supports 501 .

[0032] During actual use, the fixed conical air duct 6 of the present invention is provided with motor supports 501 on the upper and lower sides of the inner conical end, and the servo motor 5 is fixedly installed between the motor supports 501 to ensure that the servo motor 5 is installed firmly.

[0033] Embodiment 6 Preferably, on the basis of Embodiment 1 or Embodiment 5, in this embodiment, the central axis of the movable conical wind duct 601 coincides with that of the fixed conical wind duct 6, and a plurality of sealing belts 603 are provided on the inner side of the wall of the fixed conical wind duct 6, and the sealing belts 603 are used to seal the gap between the fixed conical wind duct 6 and the movable conical wind duct 601.

[0034] During actual use, a plurality of sealing belts 603 are provided on the inner side of the wall of the fixed conical wind duct 6 of the present invention, and the sealing belts 603 are used to seal the gap between the fixed conical wind duct 6 and the movable conical wind duct 601 to prevent air leakage and ensure that the intelligent air valve 1 can accurately adjust the air volume and air pressure.

[0035] Embodiment 7 Preferably, on the basis of Embodiment 1 or Embodiment 6, in this embodiment, the programmable pulse generator 4 is fixedly installed on the side wall of the tunnel lining at a position 1.5 meters away from the tunnel floor.

[0036] During actual use, the programmable pulse generator 4 of the present invention is fixedly installed on the side wall of the tunnel lining at a position 1.5 meters away from the tunnel floor, which is easy to operate and does not affect the ground construction in the tunnel.

[0037] Embodiment 8 A method for using an air duct type automatic sensing and regulating air valve for tunnel construction ventilation comprises the following steps: S1: hoist the smart air valve 1 to the designed position, and install expansion bolts 106 at the contact position between the mounting plate 105 of the smart air valve 1 and the tunnel lining to fix the smart air valve 1; S2: Connect the smart air valve 1 to the air duct 2 through the flange interface 3; S3: Install a programmable pulse generator 4 at a position 1.5 m away from the bottom plate on the side wall of the tunnel lining, and connect it to the terminal 104 of the smart air valve 1 using an explosion-proof cable 401; S4: Turn on the fan outside the cave, control the rotation angle and torque of the servo motor 5 through the programmable pulse generator 4, and use the wind speed and wind pressure sensor 7 to test the wind speed and wind pressure of the air outlet 103 of the intelligent air valve 1; S5: By recording the power W of the fan, the wind speed V1 and wind pressure U1 at the fan outlet, the wind speed V2 and wind pressure U2 at the outlet of the intelligent air valve 1, the opening and closing angle α of the intelligent air valve 1, and the signal voltage M of the servo motor 5, the machine learning and correction of the intelligent air valve 1 are carried out. After on-site adjustment, the above data are used to obtain the relationship curve and fitting curve among α, M, V2, and U2. The results are input into the programmable pulse generator 4 for automatic sensing and adjustment of the air volume and air pressure, and are adjusted according to usage requirements.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A duct type automatic sensing and regulating air valve for tunnel construction ventilation, characterized in that: The invention comprises an intelligent air valve (1), wherein flange interfaces (3) are respectively provided at both ends of the intelligent air valve (1), and the intelligent air valve (1) is connected to an air duct (2) via the flange interfaces (3). The intelligent air valve (1) comprises an equipment housing (101), wherein a fixed conical air cylinder (6) is provided inside the equipment housing (101), and a servo motor (5) is provided at the conical end inside the fixed conical air cylinder (6), and the output end of the servo motor (5) is connected to a movable conical air cylinder (601), and the movable conical air cylinder (601) is connected to the output end of the servo motor (5). The cylinder (601) is located inside the fixed conical wind cylinder (6); the cylinder walls of the fixed conical wind cylinder (6) and the movable conical wind cylinder (601) are respectively provided with a plurality of strip-shaped wind belts (604) at equal intervals; the servo motor (5) is connected to an explosion-proof cable (401); the end of the explosion-proof cable (401) is connected to a programmable pulse generator (4); and the movable conical wind cylinder (601) is displaced and moved with the fixed conical wind cylinder (6) under the rotation of the servo motor (5) to form an adjustable air outlet (602).

2. According to claim 1, a duct type automatic sensing and regulating air valve for tunnel construction ventilation is characterized in that: The space formed by the device housing (101) and the fixed conical wind tube (6) on the side close to the servo motor (5) is an air inlet (102), and the space formed on the side away from the servo motor (5) is an air outlet (103). A plurality of wind speed and pressure sensors (7) are arranged in the device housing (101) on the side of the air outlet (103).

3. According to claim 2, a duct type automatic sensing and regulating air valve for tunnel construction ventilation is characterized in that: The wind speed and wind pressure sensors (7) are provided with four, and are symmetrically arranged vertically and horizontally on the same cross section inside the device housing (101).

4. According to claim 1, the duct type automatic sensing and regulating air valve for tunnel construction ventilation is characterized in that: Mounting plates (105) are respectively provided at both ends of the upper outer side of the device housing (101), and a plurality of expansion bolts (106) are provided on the mounting plates (105). A wiring terminal (104) is provided at the middle position of the upper outer side of the device housing (101), and one end of the wiring terminal (104) is electrically connected to the explosion-proof cable (401), and the other end is electrically connected to the servo motor (5) via a wire.

5. According to claim 1, the duct type automatic sensing and regulating air valve for tunnel construction ventilation is characterized in that: Motor supports (501) are respectively provided on the upper and lower sides of the inner conical end of the fixed conical wind tube (6), and the servo motor (5) is fixedly mounted between the motor supports (501).

6. According to claim 1, the duct type automatic sensing and regulating air valve for tunnel construction ventilation is characterized in that: The central axis of the movable conical wind tube (601) coincides with the central axis of the fixed conical wind tube (6), and a plurality of sealing belts (603) are provided on the inner side of the wall of the fixed conical wind tube (6), and the sealing belts (603) are used to seal the gap between the fixed conical wind tube (6) and the movable conical wind tube (601).

7. According to claim 1, the duct type automatic sensing and regulating air valve for tunnel construction ventilation is characterized by: The programmable pulse generator (4) is fixedly installed on the tunnel lining side wall at a position 1.5 meters away from the tunnel bottom plate.

8. A method for using the duct type automatic sensing and regulating air valve for tunnel construction ventilation as claimed in claims 1 to 7, characterized in that: The following steps are involved: S1: hoisting the intelligent air valve (1) to the designed position, and installing expansion bolts (106) at the contact position between the mounting plate (105) of the intelligent air valve (1) and the tunnel lining to fix the intelligent air valve (1); S2: Connecting the intelligent air valve (1) to the air duct (2) via the flange interface (3); S3: Install a programmable pulse generator (4) at a position 1.5 m from the bottom plate on the side wall of the tunnel lining, and connect it to the wiring terminal (104) of the intelligent air valve (1) using an explosion-proof cable (401); S4: Turn on the fan outside the cave, control the rotation angle and torque of the servo motor (5) through the programmable pulse generator (4), and use the wind speed and wind pressure sensor (7) to test the wind speed and wind pressure at the air outlet (103) of the intelligent air valve (1); S5: By recording the fan power W, the wind speed V1 and wind pressure U1 at the fan outlet, the wind speed V2 and wind pressure U2 at the smart air valve (1) outlet, the opening and closing angle α of the smart air valve (1), and the signal voltage M of the servo motor (5), the smart air valve (1) is machine-learned and corrected. After on-site adjustment, the above data is used to obtain a relationship curve and a fitting curve among α, M, V2, and U2. The result is input into the programmable pulse generator (4) to automatically sense and adjust the air volume and air pressure, and adjust according to the usage requirements.

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