Volute structure and centrifugal fan thereof

Abstract

The utility model discloses a volute structure and a centrifugal fan thereof, and relates to the technical field of centrifugal fans, the volute structure comprises a shell and an air outlet mechanism, the air outlet mechanism comprises a fixed square pipe fixedly connected to the outer wall of the shell, the interior of the fixed square pipe is communicated with fluid in the shell, and the top end of the fixed square pipe is fixedly connected with a corrugated pipe; the top end of the corrugated pipe is fixedly connected with a movable square pipe, and rotating mechanisms are symmetrically arranged between the fixed square pipe and the movable square pipe. Through the arrangement of the fixed square pipe, the movable square pipe and the corrugated pipe and under the cooperation of the rotating mechanism, the movable square pipe can rotate around the position of the rotating mechanism, so that the orientation of the movable square pipe can be changed; and through telescopic arrangement of the corrugated pipe, it can still be guaranteed that the movable square pipe communicates with the fixed square pipe after the movable square pipe rotates, so that the angle of the movable square pipe can be adjusted according to the requirement of external equipment, and the applicability of the centrifugal fan is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, and particularly relates to a volute structure and a centrifugal fan thereof. Background Technique

[0002] A centrifugal fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas.

[0003] The outer shell of the centrifugal fan is arranged in a volute shape. An air inlet pipe is arranged in the middle of the outer shell. When the centrifugal fan works, the internal impeller rotates, so that the external air enters the centrifugal fan along the air inlet pipe. An air outlet pipe is arranged on the outer wall of the outer shell, and the air outlet pipe is connected with an external device, so that the air in the centrifugal fan can enter the external device along the air outlet pipe for use.

[0004] At present, the air outlet pipe on the centrifugal fan is fixed, resulting in a fixed air outlet direction of the centrifugal fan. Therefore, when the external device is connected to the air outlet pipe, there is only one connection angle. If the connection angle is different, it is necessary to select a suitable connecting pipe fitting and then connect the connecting pipe fitting to the external device and the air outlet pipe respectively. The steps are cumbersome, resulting in low applicability of the centrifugal fan. For this reason, we propose a volute structure and a centrifugal fan thereof. Content of the Utility Model

[0005] The purpose of the utility model is to provide a volute structure and a centrifugal fan thereof to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a volute structure, including:

[0007] A housing;

[0008] An air outlet mechanism, which is arranged on the outer wall of the housing and is used for discharging the air entering the housing. The air outlet mechanism includes a fixed square pipe fixedly connected to the outer wall of the housing. The inside of the fixed square pipe is in fluid communication with the inside of the housing. A corrugated pipe is fixedly connected to the top end of the fixed square pipe, and a movable square pipe is fixedly connected to the top end of the corrugated pipe. A rotating mechanism is symmetrically arranged between the fixed square pipe and the movable square pipe.

[0009] Preferably, the rotating mechanism includes a fixed block fixedly connected to the outer wall of the fixed square pipe. One end of the fixed block is fixedly connected with a first connecting strip. A second connecting strip is fixedly connected to the outer wall of the movable square pipe. A rotating shaft is fixedly connected to the end of the second connecting strip. The rotating shaft is rotatably connected to the end of the first connecting strip away from the fixed block. A guiding mechanism is symmetrically arranged between the fixed square pipe and the movable square pipe.

[0010] Preferably, the guiding mechanism includes a fixing strip fixedly connected to the outer wall of the fixed square pipe. A sliding groove is formed in the outer wall of the fixing strip. A fixing shaft is fixedly connected to the outer wall of the movable square pipe. The outer wall of the fixing shaft is slidably connected to the inner wall of the sliding groove. A locking mechanism is arranged on the outer wall of the fixing shaft.

[0011] Preferably, the locking mechanism includes a locking nut sleeved on the outer wall of the fixing shaft. An external thread groove is formed in the outer wall of the fixing shaft. The outer wall of the external thread groove is meshed with the inner wall of the locking nut.

[0012] Preferably, a connecting frame is fixedly sleeved on the top of the outer wall of the movable square pipe. A plurality of first connecting holes are formed in the top end of the connecting frame.

[0013] Preferably, an air inlet pipe is fixedly inserted through the outer wall of the housing. A connecting ring is fixedly sleeved on the end of the outer wall of the air inlet pipe. A second connecting hole is formed in the outer wall of the connecting ring. A filter screen is arranged on the inner wall of the connecting ring.

[0014] The utility model also provides a centrifugal fan, which includes the volute structure described in any one of the above.

[0015] The technical effects and advantages of the utility model:

[0016] By using the fixed square pipe, the movable square pipe and the corrugated pipe, and with the cooperation of the rotating mechanism, the movable square pipe can rotate around the position of the rotating mechanism, so as to change the orientation of the movable square pipe. And the telescopic setting of the corrugated pipe enables the movable square pipe to still be connected with the fixed square pipe after rotation, so that the angle of the movable square pipe can be adjusted according to the needs of external equipment, thus improving the applicability of the centrifugal fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of the utility model.

[0018] Figure 2 It is for the Figure 1 partial enlarged structural diagram at A of the utility model.

[0019] In the figure: 101, housing; 201, fixed square pipe; 202, movable square pipe; 203, corrugated pipe; 301, fixed block; 302, first connecting strip; 303, second connecting strip; 304, rotating shaft; 401, fixing strip; 402, fixing shaft; 403, sliding groove; 501, external thread groove; 502, locking nut; 601, connecting frame; 602, first connecting hole; 701, air inlet pipe; 702, filter screen; 703, connecting ring; 704, second connecting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The utility model provides Figure 1-2 A volute structure shown includes a shell 101 and an air outlet mechanism, which is arranged on the outer wall of the shell 101 and is used to discharge the air entering the shell 101. The air outlet mechanism includes a fixed square tube 201 fixedly connected to the outer wall of the shell 101, the interior of the fixed square tube 201 is fluidically connected to the interior of the shell 101, a bellows 203 is fixedly connected to the top of the fixed square tube 201, a movable square tube 202 is fixedly connected to the top of the bellows 203, and a rotating mechanism is symmetrically arranged between the fixed square tube 201 and the movable square tube 202. Through the arrangement of the bellows 203 and with the cooperation of the rotating mechanism, the movable square tube 202 can be rotated around the position of the rotating mechanism, so that the direction of the movable square tube 202 can be changed, and the telescopic arrangement of the bellows 203 ensures that the movable square tube 202 can still be connected to the fixed square tube 201 after the movable square tube 202 is rotated, so that the angle of the movable square tube 202 can be adjusted according to the requirements of the external equipment, thereby improving the applicability of the centrifugal fan.

[0022] The rotating mechanism includes a fixed block 301 fixedly connected to the outer wall of the fixed square tube 201, one end of the fixed block 301 is fixedly connected to the first connecting bar 302, the outer wall of the movable square tube 202 is fixedly connected to the second connecting bar 303, the end of the second connecting bar 303 is fixedly connected to the rotating shaft 304, the rotating shaft 304 is rotatably connected to the end of the first connecting bar 302 away from the fixed block 301, and a guiding mechanism is symmetrically arranged between the fixed square tube 201 and the movable square tube 202. The movable square tube 202 is connected so that the rotation position of the movable square tube 202 is located at the position of the rotating shaft 304, that is, the movable square tube 202 can rotate around the position of the rotating shaft 304, and the rotating shaft 304 is located between the fixed square tube 201 and the movable square tube 202, so that when the movable square tube 202 rotates, there can be enough space for the bellows 203 to expand and contract, avoiding the bellows 203 from being deflated, so that after the movable square tube 202 rotates, the stability of the connection between the movable square tube 202 and the fixed square tube 201 can be guaranteed.

[0023] Among them, the guiding mechanism includes a fixing strip 401 fixedly connected to the outer wall of the fixed square pipe 201. A sliding groove 403 is formed on the outer wall of the fixing strip 401. A fixing shaft 402 is fixedly connected to the outer wall of the movable square pipe 202. The outer wall of the fixing shaft 402 is slidably connected to the inner wall of the sliding groove 403. A locking mechanism is arranged on the outer wall of the fixing shaft 402. When the movable square pipe 202 rotates, the movable square pipe 202 rotates around the position of the rotating shaft 304. At the same time, the rotation of the movable square pipe 202 drives the fixing shaft 402 to move, so that the fixing shaft 402 moves in the sliding groove 403, thereby enabling the movable square pipe 202 to rotate stably, and thus improving the stability of the adjustment of the movable square pipe 202.

[0024] Among them, the locking mechanism includes a locking nut 502 sleeved on the outer wall of the fixing shaft 402. An external thread groove 501 is formed on the outer wall of the fixing shaft 402. The outer wall of the external thread groove 501 is meshed with the inner wall of the locking nut 502. When the movable square pipe 202 rotates to the required angle, then the locking nut 502 is rotated. Through the meshing of the inner wall of the locking nut 502 and the outer wall of the external thread groove 501, the locking nut 502 moves until the locking nut 502 tightly abuts against the outer wall of the fixing strip 401, thereby positioning the rotated movable square pipe 202, and thus improving the stability of the use of the movable square pipe 202.

[0025] Among them, a connection frame 601 is fixedly sleeved on the top of the outer wall of the movable square pipe 202. A plurality of first connection holes 602 are formed at the top end of the connection frame 601. Through the arrangement of the connection frames 601 and 603, it is convenient to connect external devices to the movable square pipe 202, so that the air in the movable square pipe 202 can stably enter the external devices.

[0026] Among them, an air inlet pipe 701 is fixedly inserted through the outer wall of the housing 101. A connection ring 703 is fixedly sleeved at the end of the outer wall of the air inlet pipe 701. A second connection hole 704 is formed on the outer wall of the connection ring 703. A filter screen 702 is arranged on the inner wall of the connection ring 703. Through the arrangement of the connection ring 703 and the second connection hole 704, it is convenient to connect an external air guiding device to the air inlet pipe 701, so that the centrifugal fan can stably intake air during operation. At the same time, through the arrangement of the filter screen 702, solids in the air entering the air inlet pipe 701 can be filtered out, thereby avoiding the phenomenon that solids enter the centrifugal fan and contact the impeller, causing the impeller to be damaged by impact, and thus improving the stability of the operation of the centrifugal fan.

[0027] The present utility model further provides a centrifugal fan, including the volute structure of any one of the above.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A volute structure, characterized in that: include: Housing (101); An air outlet mechanism is provided on the outer wall of a shell (101) and is used to discharge air entering the shell (101). The air outlet mechanism comprises a fixed square tube (201) fixedly connected to the outer wall of the shell (101), the interior of the fixed square tube (201) is in fluid communication with the interior of the shell (101), the top end of the fixed square tube (201) is fixedly connected to a bellows (203), the top end of the bellows (203) is fixedly connected to a movable square tube (202), and a rotating mechanism is symmetrically provided between the fixed square tube (201) and the movable square tube (202).

2. A volute structure according to claim 1, characterized in that: The rotating mechanism comprises a fixed block (301) fixedly connected to the outer wall of the fixed square tube (201); one end of the fixed block (301) is fixedly connected to a first connecting bar (302); the outer wall of the movable square tube (202) is fixedly connected to a second connecting bar (303); the end of the second connecting bar (303) is fixedly connected to a rotating shaft (304); the rotating shaft (304) is rotatably connected to the end of the first connecting bar (302) away from the fixed block (301); and a guiding mechanism is symmetrically arranged between the fixed square tube (201) and the movable square tube (202).

3. A volute structure according to claim 2, characterized in that: The guide mechanism comprises a fixing strip (401) fixedly connected to the outer wall of the fixing square tube (201), the outer wall of the fixing strip (401) is provided with a sliding groove (403), the outer wall of the movable square tube (202) is fixedly connected to a fixing shaft (402), the outer wall of the fixing shaft (402) is slidably connected to the inner wall of the sliding groove (403), and the outer wall of the fixing shaft (402) is provided with a locking mechanism.

4. A volute structure according to claim 3, characterized in that: The locking mechanism comprises a locking nut (502) sleeved on the outer wall of the fixed shaft (402); the outer wall of the fixed shaft (402) is provided with an external thread groove (501); the outer wall of the external thread groove (501) is meshedly connected with the inner wall of the locking nut (502).

5. A volute structure according to claim 1, characterized in that: A connection frame (601) is fixedly sleeved on the top of the outer wall of the movable square tube (202), and a plurality of first connection holes (602) are provided on the top of the connection frame (601).

6. A volute structure according to claim 1, characterized in that: An air inlet pipe (701) is fixedly inserted and connected to the outer wall of the shell (101); a connecting ring (703) is fixedly sleeved on the end of the outer wall of the air inlet pipe (701); a second connecting hole (704) is provided on the outer wall of the connecting ring (703); and a filter screen (702) is provided on the inner wall of the connecting ring (703).

7. A centrifugal fan, characterized in that: The volute structure comprises the volute structure as described in any one of claims 1 to 6.

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