CN113294194B - Tunnel jet fan experimental device - Google Patents

Abstract

The invention discloses a tunnel jet fan experimental device, which comprises: the rotary table is provided with two centrosymmetric guide pipe mounting holes, the guide pipes are of a folded structure, and the mounting grooves are through pipes with large middle pipe diameters and small two-end pipe diameters; the brushless motor and the electronic speed regulator are electrically connected and then arranged in the mounting groove, two ends of the mounting groove are respectively connected with a flow guide pipe, and the vertical sections of the two flow guide pipes are embedded and fixed in the flow guide pipe mounting holes; when the experiment is carried out, the experimental device can rotate around the central shaft of the rotary disc in a manual operation mode. Through the arrangement of the turntable and the components matched with the turntable, the experimental device can be used for adjusting the deflection angle of the jet fan in an operation and control manner, can better simulate a jet flow field in actual engineering and obtain an experimental result with higher reference value during experimental operation.

Description

An experimental device for a tunnel jet fan

technical field

The invention relates to the technical field of tunnel wind speed test equipment, in particular to a tunnel jet fan test device.

Background technique

As a simple mechanical ventilation method, longitudinal ventilation is widely used in highway tunnels. The jet fan is the main ventilation device in the tunnel ventilation system, and the air flow it induces is essentially a high-speed air jet. At the same time, the reasonable arrangement of the jet fan not only affects the ventilation effect in the entire tunnel, but also directly affects the energy consumption of the tunnel operation. Therefore, analyzing the characteristics of air jets in highway tunnels and optimizing the layout of jet fans in highway tunnels are of great significance for improving the ventilation system design of tunnel complexes and reducing tunnel operation ventilation costs.

The traditional tunnel ventilation experimental devices mostly use axial flow fans combined with rectification sections to supply air to form a uniform cross-sectional wind speed in the travel lane of the tunnel model. However, this method has some shortcomings, such as: (1) supplying air with a uniform cross-sectional wind speed does not match the actual project; (2) it is impossible to carry out experimental research on the ventilation effect of jet fans under different installation methods; (3) jet fans The flow field in the nearby area is complex, and experiments involving this area cannot be verified.

Therefore, in view of the shortcomings of the existing tunnel jet fan experimental device, a new method that can adjust the deflection angle of the jet fan during the experiment, can better simulate the jet flow field in the actual project, and obtain experimental results with more reference value is invented. The tunnel jet fan experimental device has become an urgent problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a tunnel jet fan experimental device that can adjust the deflection angle of the jet fan during the experiment, can better simulate the jet flow field in the actual project, and obtain experimental results with more reference value. . In order to solve the above problems, the technical solutions provided by the present invention are as follows:

An experimental device for a tunnel jet fan of the present invention includes: a turntable, a guide tube, a mounting slot, a brushless motor and an electronic speed governor, and two center-symmetric guide tubes are arranged on the turntable. The installation hole, the guide tube is in a folded structure, and the installation groove is a through tube with a large diameter in the middle and a small diameter at both ends; the brushless motor and the electronic governor are electrically connected and arranged in the In the installation groove, two ends of the installation groove are respectively connected with one of the guide pipes, and the vertical sections of the two guide pipes are embedded in the installation holes of the guide pipes; during the experiment, The experimental device can be manually rotated around the central axis of the turntable. Among them, the diversion tube with a folded structure, that is, the first section is a horizontal diversion tube, the second section diversion tube is at a 90° angle to the first section, and the third section diversion tube is also a horizontal diversion tube. The third segment and the second segment also form an angle of 90°, but the first segment and the third segment are respectively arranged on opposite sides of the second segment. In this way, by setting the turntable and the above-mentioned components, the experimental device can be controlled to adjust the deflection angle of the jet fan during the experimental operation, can better simulate the jet flow field in the actual project, and obtain more reference value. Experimental results. When the experimental device is in use, the air is inhaled from the guide tube at one end of the experimental device, and then ejected from the other end after being pressurized by the brushless motor. Simulate the jet flow field induced by the jet fan in the actual tunnel project.

Further, the turntable includes an upper turntable and a lower turntable, the diameter of the upper turntable is larger than the diameter of the lower turntable, and a step structure is formed between the upper turntable and the lower turntable, and the step structure is used to The experimental device is inserted into the preset experimental device installation hole at the top of the tunnel model. In this way, the manual manipulation and rotation of the experimental device is simpler and more convenient.

Further, the upper turntable and the lower turntable are integrally formed or assembled after separate molding; the turntable includes two parts that are symmetrical along the installation direction of the guide tube, and the guide tube is installed after the guide tube is installed. After the tube, the two parts of the turntable are joined and fixed. That is, the turntable is divided into two parts that are symmetrical on the left and right, which is convenient for the installation of the guide pipe. After the guide pipe is installed in the predetermined position, it is only necessary to connect the two parts of the turntable and fix it.

Further, the edge of the upper surface of the turntable is provided with a deflection angle scale line of 0°-30° along the axis of the guide tube installation direction. A deflection angle scale line of 0°-30° is set up and down the axis, that is, the entire experimental device can be rotated 0°-30° clockwise or counterclockwise around the axis. Further, the edge of the upper surface of the turntable is provided with a deflection angle scale line of 0°-15° along the axis of the guide tube installation direction. In this way, it is very convenient to observe and record the test range, which makes the experimental results of the jet fan more comprehensive and accurate.

Further, the guide pipe is a PVC pipe, the horizontal section of the guide pipe of the folded structure is 3cm long, and the vertical section length is 6cm; the installation groove is a rubber pipe groove, and the middle part of the installation groove is a pipe. The diameter is 5cm, the length is 5cm, the length of the connection part at both ends of the installation groove is 3cm, and the pipe diameter of the connection part at both ends of the installation groove is the same as the diameter of the guide pipe; The diameter of the pipe can be reduced by n: 1 according to the actual diameter of the jet fan.

The beneficial effects of the tunnel jet fan experimental device provided by the present invention are:

By setting the turntable and the matching components mentioned above, the experimental device can control the deflection angle of the jet fan during the experimental operation, can better simulate the jet flow field in the actual project, and obtain experimental results with more reference value. .

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the overall structure schematic diagram of the tunnel jet fan experimental device of the present invention;

Fig. 2 is the longitudinal cross-sectional structural schematic diagram of the tunnel jet fan experimental device of the present invention along the axis of the guide pipe;

3 is a schematic diagram of the surface structure of the turntable in the tunnel jet fan experimental device of the present invention.

Detailed ways

In order for those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are further described below with reference to the accompanying drawings. illustrate.

It should be noted here that the descriptions of these embodiments are used to help the understanding of the present invention, but do not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Please refer to FIG. 1 to FIG. 3 , a tunnel jet fan test device of the present embodiment includes: a turntable 1, a guide tube 2, an installation slot 3, a brushless motor 4 and an electronic governor 5, and the turntable 1 There are two centrally symmetrical guide tube installation holes 11, the guide tube 2 is in a folded structure, and the installation groove 3 is a through tube with a large diameter in the middle and a small diameter at both ends; the brushless motor 4 and the electronic adjustment The speed device 5 is installed in the installation slot 3 after being electrically connected. The two ends of the installation slot 3 are respectively connected with a guide tube 2 , and the vertical sections of the two guide tubes 2 are embedded in the guide tube installation hole 11 .

As a preferred embodiment, the turntable 1 includes an upper turntable 101 and a lower turntable 102, the diameter of the upper turntable 101 is larger than the diameter of the lower turntable 102, and a step structure 12 is formed between the upper turntable 101 and the lower turntable 102, and the step structure 12 is used for the experiment The device is inserted into the preset experimental device installation hole at the top of the tunnel model, and the experimental device can be rotated around the central axis of the turntable 1 manually.

Further preferably, the upper turntable 101 and the lower turntable 102 are integrally formed or assembled after being separately formed; the turntable 1 includes two parts that are symmetrical along the installation direction of the guide tube 2. After the guide tube 2 is installed, the turntable is assembled. The two parts of 1 are joined and fixed.

Preferably, the edge of the upper surface of the turntable 1 is provided with a deflection angle scale line of 0°-30° along the axis of the guide tube 2 in the installation direction. More preferably, the edge of the upper surface of the turntable 1 is provided with a deflection angle scale line of 0°-15° along the axis of the guide tube 2 in the installation direction, and is provided with a deflection of 0°-15° in the clockwise and counterclockwise directions of the axis. Angle tick marks.

More specifically, the guide pipe 2 is a PVC pipe, and the length of the horizontal section of the guide pipe 2 of the folded structure is 3cm and the length of the vertical section is 6cm; the installation groove 3 is a rubber pipe groove, and the pipe diameter in the middle part of the installation groove 3 It is 5cm, the length is 5cm, the length of the connection part of the installation groove 3 is 3cm, the diameter of the connection part of the installation groove 3 is the same as the diameter of the guide pipe 2; the diameter of the installation groove 3 and the guide pipe 2 can be based on the actual The diameter of the jet fan is reduced according to n:1. Among them, the length dimensions of each section and each part of the guide tube 2 and the installation groove 3 only represent the dimensional relationship between them, and can be proportionally enlarged or reduced according to actual needs.

Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from other embodiments.

The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and alterations to these embodiments without departing from the principle and spirit of the present invention still fall within the protection scope of the present invention.

Claims (2)

1. The utility model provides a tunnel efflux fan experimental apparatus which characterized in that, experimental apparatus includes: the automatic flow-guiding device comprises a rotary table (1), flow guiding pipes (2), a mounting groove (3), a brushless motor (4) and an electronic speed regulator (5), wherein two flow guiding pipe mounting holes (11) which are centrosymmetric are formed in the rotary table (1), the flow guiding pipes (2) are of a folding structure, and the mounting groove (3) is a through pipe with a large middle pipe diameter and small pipe diameters at two ends;

the brushless motor (4) and the electronic speed regulator (5) are electrically connected and then are arranged in the mounting groove (3), two ends of the mounting groove (3) are respectively connected with one flow guide pipe (2), and the vertical sections of the two flow guide pipes (2) are embedded and fixed in the flow guide pipe mounting holes (11); when in experiment, the experimental device can rotate around the central shaft of the turntable (1) manually;

the turntable (1) comprises an upper turntable (101) and a lower turntable (102), the diameter of the upper turntable (101) is larger than the diameter of the lower turntable (102), a step structure (12) is formed between the upper turntable (101) and the lower turntable (102), the step structure (12) is used for embedding the experimental device in an experimental device mounting hole preset at the top of the tunnel model in a clamping manner, the upper turntable (101) and the lower turntable (102) are integrally formed or assembled after being formed in a split mode, the rotary disc (1) comprises two parts which are symmetrical along the installation direction of the draft tube (2), after the draft tube (2) is installed, the two parts of the rotating disc (1) are jointed and fixed, the edge of the upper surface of the turntable (1) is provided with 0-30-degree deflection angle scale marks along the axis of the installation direction of the draft tube (2).

2. The tunnel jet fan experimental device according to claim 1, wherein the draft tube (2) is a PVC pipe, the horizontal section of the draft tube (2) in the folded structure is 3cm in length, and the vertical section of the draft tube is 6cm in length; the mounting groove (3) is a rubber pipe groove, the pipe diameter of the middle part of the mounting groove (3) is 5cm, the length of the middle part of the mounting groove is 5cm, the length of the connecting parts at two ends of the mounting groove (3) is 3cm, and the pipe diameters of the connecting parts at two ends of the mounting groove (3) are the same as the pipe diameter of the flow guide pipe (2);

the mounting groove (3) and the pipe diameter size of the flow guide pipe (2) can be measured according to the actual jet fan diameter according to n: 1 reduce the setting.

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