Tunnel jet fan

Abstract

The utility model discloses a tunnel jet fan which comprises a main body, a motor is arranged in the main body, an impeller is arranged on an output shaft of the motor, the two ends of the main body are respectively provided with a silencing barrel, an inner barrel is arranged in the main body, a limiting ring is arranged at one end of the inner barrel, a plurality of through holes are formed in the inner barrel, and the through holes are communicated with the silencing barrels. A cavity is formed among the silencing barrel, the inner barrel and the limiting ring, and a silencing layer is arranged in the cavity. Noise generated when the tunnel jet fan works can enter the cavity formed among the silencing barrel, the inner barrel and the limiting ring through the through holes formed in the inner barrel, the noise can be absorbed by the silencing layer in the cavity, noise leakage is avoided, and the environment is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a tunnel jet fan. Background Art

[0002] Jet fans are a special type of axial flow fans, which are mainly used in the longitudinal ventilation systems of highway, railway and subway tunnels to provide full thrust. They can also be used in sensitive parts of semi-transverse ventilation systems or transverse ventilation systems, such as the entrance and exit of tunnels, to induce airflow or exhaust smoke. Jet fans are generally suspended on the top of the tunnel, do not occupy building area, and do not require the construction of additional air ducts. They have the characteristics of high efficiency, low noise, stable operation and easy maintenance. At present, in the use of tunnel jet fans, a lot of noise will be generated during the operation of the fan. Since noise is a sound wave with irregular frequency and strength changes and chaotic sound, when the decibel of noise is too high, it will affect the driver's driving and the work of tunnel staff. Utility Model Content

[0003] The utility model aims to solve at least one problem existing in the prior art. To this end, the purpose of the utility model is to provide a tunnel jet fan.

[0004] To achieve the above purpose, the technical solution of the utility model is:

[0005] A tunnel jet fan comprises a main body, wherein a motor is arranged inside the main body, an impeller is arranged on the output shaft of the motor, a silencer is arranged at each end of the main body, an inner cylinder is arranged inside the silencer, a limiting ring is arranged at one end of the inner cylinder, a plurality of through holes are arranged on the inner cylinder, a cavity is formed between the silencer, the inner cylinder and the limiting ring, and a sound-absorbing layer is arranged in the cavity.

[0006] Preferably, a plurality of guide grooves are arranged on the inner wall of the silencer tube, and a plurality of guide blocks are arranged on the outer wall of the inner tube, and the guide blocks are used in conjunction with the guide grooves.

[0007] Preferably, the guide block divides the cavity into a plurality of small cavities, and each small cavity is provided with an arc-shaped block-shaped sound-absorbing layer.

[0008] Preferably, it further comprises a plurality of first hoops and second hoops, which are used in combination, and a plurality of installation grooves are arranged on the outer wall of the main body, in which the first hoops and the second hoops are arranged.

[0009] Preferably, the first clamp and the second clamp are provided with connecting heads at opposite positions, and the connecting heads are provided with a first connecting hole.

[0010] Preferably, a plurality of connecting columns are provided on the first clamp, and arc plates are provided on the connecting columns.

[0011] Preferably, a dustproof net is provided at the outer end of the silencer, and a plurality of second connection holes are provided at corresponding positions of the dustproof net, the main body and the silencer.

[0012] Preferably, the main body, the silencer cylinder and the inner cylinder are all hollow cylindrical structures with openings at both ends.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The noise generated by the tunnel jet fan of the utility model when working will enter the cavity formed between the silencer cylinder, the inner cylinder and the limit ring through the through hole opened on the inner cylinder, and the noise will be absorbed by the silencer layer in the cavity, thus avoiding noise leakage and optimizing the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 It is a silencer cylinder and an inner cylinder of the utility model;

[0018] Figure 4 This utility model Figure 1 Enlarged view of point A in .

[0019] In the figure: 1. main body, 101. mounting groove, 2. motor, 3. impeller, 4. silencer, 401. guide groove, 5. inner tube, 501. limiting ring, 502. through hole, 503. guide block, 6. silencer layer, 7. first clamp, 8. second clamp, 9. connector, 10. first connecting hole, 11. connecting column, 12. arc plate, 13. dustproof net, 14. second connecting hole. DETAILED DESCRIPTION

[0020] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0021] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which the utility model belongs. The words "one" or "one" and the like used in the specification and claims of this application do not indicate a quantitative limitation, but indicate the existence of at least one. "Multiple" includes two, which is equivalent to at least two. "Including" or "including" and the like mean that the elements or objects appearing in front of "including" or "including" include the elements or objects listed after "including" or "including" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and the like are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms of "one", "said" and "the" used in the specification and the appended claims of this application are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0022] Embodiment 1:

[0023] Please refer to Figure 1-4 The tunnel jet fan comprises a main body 1, a motor 2 is arranged inside the main body 1, the motor 2 is fixed on a connecting plate inside the main body 1, an impeller 3 is arranged on the output shaft of the motor 2, a silencer 4 is arranged at each end of the main body 1, an inner cylinder 5 is arranged inside the silencer 4, the main body 1, the silencer 4 and the inner cylinder 5 are all hollow cylindrical structures with openings at both ends, a limiting ring 501 is arranged at one end of the inner cylinder 5, a plurality of through holes 502 are arranged on the inner cylinder 5, a cavity is formed between the silencer 4, the inner cylinder 5 and the limiting ring 501, a sound-absorbing layer 6 is arranged in the cavity, and the limiting ring 501 limits the sound-absorbing layer 6 to prevent the sound-absorbing layer 6 from passing through the other end of the cavity.

[0024] The noise generated when the motor 2 drives the impeller 3 to rotate will be transmitted to the silencer 4, and then enter the cavity formed by the silencer 4, the inner cylinder 5 and the limit ring 501 through the through hole 502 on the inner cylinder 5. The noise will be absorbed by the silencer layer 6 in the cavity to avoid noise leakage and optimize the environment.

[0025] In this embodiment, the sound-absorbing layer 6 is made of sound-insulating mineral wool, and the thickness of the sound-absorbing layer 6 is slightly less than or equal to the height of the cavity.

[0026] In this embodiment, the main body 1, the silencer 4 and the inner tube 5 are all made of metal material, preferably aluminum.

[0027] Four guide grooves 401 are arranged on the inner wall of the silencer 4, and the guide groove 401 passes through one end of the silencer 4 but not the other end. Four guide blocks 503 are arranged on the outer wall of the inner tube 5, and the length of the guide blocks 503 is the same as the length of the guide grooves 401. The guide blocks 503 cooperate with the guide grooves 401 to play a guiding and limiting role, which facilitates the assembly of the inner tube 5 and also prevents the inner tube 5 located in the silencer 4 from rolling circumferentially.

[0028] The guide block 503 divides the cavity into four small cavities, each of which is provided with an arc-shaped block-shaped sound-absorbing layer 6, and the formation of the sound-absorbing layer 6 is adapted to the shape of the small cavity.

[0029] A dustproof net 13 is provided at the outer end of the silencer 4, which reduces the suction of dust and debris and prevents the dust and debris from accumulating inside the fan. Six second connecting holes 14 are provided at corresponding positions of the dustproof net 13, the main body 1 and the silencer 4. Fasteners can be installed in the second connecting holes 14. The dustproof net 13, the main body 1 and the silencer 4 can be fixed together through the fasteners. At the same time, the dustproof net 13 will cover the inner tube 5, fix the inner tube 5, and limit the movement of the inner tube 5.

[0030] Embodiment 2:

[0031] Please refer to Figure 1 and 2 The tunnel jet fan also includes two first clamps 7 and a second clamp 8, which are used together. Two mounting grooves 101 are arranged on the outer wall of the main body 1. The first clamp 7 and the second clamp 8 are arranged in the mounting grooves 101. The mounting grooves 101 limit the first clamp 7 and the second clamp 8, thereby preventing the first clamp 7 and the second clamp 8 from moving left and right. The first clamp 7 and the second clamp 8 are provided with a connector 9 at relative positions, and a first connecting hole 10 is arranged on the connector 9. A fastener can be installed in the first connecting hole 10, and the first clamp 7 and the second clamp 8 can be fixed together by the fastener.

[0032] Three connecting columns 11 are arranged on each first clamp 7, and an arc plate 12 is arranged on the connecting column 11. One end of the connecting column 11 is fastened to the first clamp 7, and the other end is fastened to the arc plate 12. The arc plate 12 is adapted to the fixed phase in the tunnel to facilitate the suspension and installation of the fan.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A tunnel jet fan, comprising a main body, a motor is arranged inside the main body, an impeller is arranged on the output shaft of the motor, and the characteristics are: A silencer is arranged at each of the two ends of the main body, an inner cylinder is arranged inside the silencer, a limiting ring is arranged at one end of the inner cylinder, a plurality of through holes are arranged on the inner cylinder, a cavity is formed between the silencer, the inner cylinder and the limiting ring, and a silencer layer is arranged in the cavity.

2. The tunnel jet fan according to claim 1, characterized in that: A plurality of guide grooves are arranged on the inner wall of the silencer cylinder, and a plurality of guide blocks are arranged on the outer wall of the inner cylinder, and the guide blocks are used in conjunction with the guide grooves.

3. The tunnel jet fan according to claim 2, characterized in that: The guide block divides the cavity into a plurality of small cavities, and each small cavity is provided with an arc-shaped block-shaped sound-absorbing layer.

4. The tunnel jet fan according to claim 1 or 3, characterized in that: It also includes a plurality of first hoops and second hoops, which are used in combination, and a plurality of installation grooves are arranged on the outer wall of the main body, and the first hoops and the second hoops are arranged in the installation grooves.

5. The tunnel jet fan according to claim 4, characterized in that: The first clamp and the second clamp are provided with connecting heads at opposite positions, and the connecting heads are provided with a first connecting hole.

6. The tunnel jet fan according to claim 5, characterized in that: A plurality of connecting columns are arranged on the first clamp, and an arc-shaped plate is arranged on the connecting columns.

7. The tunnel jet fan according to claim 3, characterized in that: The outer end of the muffler is provided with a dustproof net, and the dustproof net, the main body and the muffler are provided with a plurality of second connection holes at corresponding positions.

8. The tunnel jet fan according to claim 1, characterized in that: The main body, the silencer cylinder and the inner cylinder are all hollow cylindrical structures with openings at both ends.

Images