Metrology laboratory and its low-noise ventilation system

Abstract

The application relates to a metering laboratory and a low-noise ventilation system thereof, which comprises a fan and a ventilation pipe connected to the fan, a connecting mechanism is arranged between the ventilation pipe and the fan to connect the two, the connecting mechanism comprises an elbow pipe connected to the fan and a flexible pipe arranged on the elbow pipe, one end of the elbow pipe is connected to the fan, the other end of the elbow pipe is arranged vertically upward and connected to the flexible pipe, one end of the flexible pipe away from the elbow pipe is connected to the ventilation pipe, the end of the ventilation pipe connected to the flexible pipe is arranged horizontally, a plurality of supporting rings are arranged in the flexible pipe along the length direction of the flexible pipe, gaps are left between adjacent supporting rings, and the lower ends of the flexible pipes are arranged in a stacked mode. When the fan works and drives the elbow pipe to vibrate, the lower ends of the stacked flexible pipes are used to slow down the vibration, the vibration amplitude of the upper end of the flexible pipe is reduced, and the vibration amplitude of the ventilation pipe is reduced, so that the noise generated by the ventilation pipe due to the vibration is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ventilation systems, in particular to a metrology laboratory and a low-noise ventilation system thereof. BACKGROUND

[0002] The metrology laboratory is a place for conducting metrology research experiments, and during the construction process, it is necessary to ensure that the elements such as temperature, humidity and vibration inside the laboratory meet the standards so as to keep the measurement results accurate.

[0003] During the use of the metrology laboratory, the ventilation equipment is needed to realize the circulation of air inside and outside the laboratory, and the fan is the most important part of the ventilation equipment to drive the air flow. However, the fan will continuously vibrate during the operation of the motor, and the vibration of the fan will be transmitted to the ventilation duct connected thereto. At this time, the vibration of the ventilation duct inside the laboratory will produce noise, thereby affecting the working environment inside the metrology laboratory.

[0004] Therefore, a new technical solution is needed to solve the above problems. SUMMARY

[0005] In order to reduce the vibration of the ventilation pipe during the operation of the ventilation system, the present application provides a metrology laboratory and a low-noise ventilation system thereof.

[0006] The low-noise ventilation system provided by the present application adopts the following technical solution:

[0007] The low-noise ventilation system comprises a fan and a ventilation pipe connected to the fan, and a connecting mechanism connecting the fan and the ventilation pipe is arranged between the fan and the ventilation pipe. The connecting mechanism comprises an elbow pipe connected to the fan and a flexible pipe arranged on the elbow pipe. One end of the elbow pipe is connected to the fan, and the other end of the elbow pipe is vertically upward and connected to the flexible pipe. The end of the flexible pipe away from the elbow pipe is connected to the ventilation pipe. The end of the ventilation pipe connected to the flexible pipe is horizontally arranged. A plurality of supporting rings are arranged in the flexible pipe along the length direction of the flexible pipe. Gaps are left between adjacent supporting rings. The lower end of the flexible pipe is stacked.

[0008] By adopting the above technical solution, when the fan works and drives the elbow pipe to vibrate, the lower end of the stacked flexible pipe is used to slow down the vibration, and the vibration amplitude of the upper end of the flexible pipe is reduced, thereby reducing the vibration amplitude of the ventilation pipe, and further reducing the noise generated by the vibration of the ventilation pipe.

[0009] Optionally, the elbow pipe is provided with a plurality of guide rods circumferentially arranged on the vertical outer wall of the elbow pipe, and the guide rods can abut against the outer wall of the flexible pipe.

[0010] By adopting the technical scheme, the position of the lower end of the stacked flexible pipe is limited by the guide rod, so that the overall position of the stacked flexible pipe is not easily changed when the flexible pipe is subjected to vibration, thereby the shock absorption effect of the flexible pipe is not easily affected.

[0011] Optionally, the ventilation pipe is further provided with a plurality of shock absorption mechanisms for reducing vibration, the shock absorption mechanism comprises a support plate arranged below the ventilation pipe, a plurality of connecting rods connected to four corners of the support plate, a plurality of shock absorption members slidingly arranged in the support plate, and a plurality of shock absorption elastic members for reducing vibration, the ventilation pipe is fixed to the upper end of the support plate, the connecting rods are respectively connected to the shock absorption members, the shock absorption members are both provided with abutting rings, the shock absorption elastic members are sleeved on the shock absorption members and are respectively arranged on the upper and lower sides of the support plate, one end of each shock absorption elastic member is connected to the support plate, and the other end of each shock absorption elastic member is connected to the abutting ring.

[0012] By adopting the technical scheme, the upper end of the connecting rod is fixed to the wall, and then the vertical movement of the support plate is realized by the cooperation of the shock absorption member and the support plate, so that when the ventilation pipe is subjected to vertical vibration, the vertical vibration amplitude of the ventilation pipe is reduced by the shock absorption elastic member, thereby further reducing the noise generated by the vibration of the ventilation pipe.

[0013] Optionally, the shock absorption member is arranged with two open ends, the connecting rod is arranged in the shock absorption member, a plurality of buffer members are arranged in the shock absorption member along the axis of the connecting rod, one end of each buffer member is connected to the inner wall of the shock absorption member, and the other end of each buffer member is connected to the connecting rod.

[0014] By adopting the technical scheme, the horizontal movement of the support plate relative to the connecting rod is buffered by the buffer member, so that the horizontal vibration of the ventilation pipe can be reduced, thereby further reducing the decibels of the noise generated by the vibration of the ventilation pipe.

[0015] Optionally, the buffer member comprises a fixed rod fixed to the support rod, a buffer sleeve sleeved on the fixed rod, and a buffer spring arranged in the buffer sleeve, one end of the fixed rod away from the connecting rod is inserted into the buffer sleeve and abuts against the buffer spring, the inner cavity side wall of the shock absorption member is provided with guide grooves in communication with each other, and one end of the buffer sleeve away from the connecting rod is inserted into the guide groove and can slide along the guide groove.

[0016] By adopting the technical scheme, when the ventilation pipe is subjected to horizontal vibration, the fixed rod and the buffer sleeve move relative to each other, and the buffer sleeve moves along the guide groove, so that the buffer member always connects the connecting rod to the shock absorption member, thereby the horizontal vibration of the ventilation pipe can be reduced by the buffer member, and the connecting rod and the shock absorption member are always connected during the shock absorption process, so that the shock absorption process is always stable.

[0017] Optionally, the buffer sleeve is rotatably connected with a roller, the roller is arranged in the guide groove, and the side wall of the roller abuts against the inner wall of the guide groove.

[0018] By adopting the above technical scheme, the sliding friction between the buffer sleeve and the damping member is converted into rolling friction by the roller, thereby reducing the friction that needs to be overcome by the buffer sleeve when sliding along the guide groove, making the movement of the buffer sleeve more convenient, and the damping effect of the buffer member is not easily affected.

[0019] Optionally, the upper projection view of the inner cavity of the damping member is rectangular.

[0020] By adopting the above technical scheme, when the buffer member is contracted or stretched, the buffer sleeve can move linearly along the guide groove, and the movement of the buffer sleeve is not easily affected during the movement, and the connecting rod is not easily affected by the torsional force along its own axis, so that the connecting rod remains stable during use.

[0021] Optionally, the connecting rod is fixed with a plurality of abutting plates, and the side walls of the abutting plates close to each other can abut against the upper end face and the lower end face of the damping member, respectively.

[0022] By adopting the above technical scheme, the abutting plates connected to the connecting rod abut against the damping member, thereby increasing the connection strength between the connecting rod and the damping member by the cooperation of the abutting ring and the damping member, so that the buffer member is not easily deformed during use, thereby affecting the damping effect of the buffer member on the ventilation pipe.

[0023] The application also provides a metering laboratory, which comprises a plurality of combined wallboards, a top wall arranged above the combined wallboards, a protective door arranged on the combined wallboards, and a low-noise ventilation system, wherein the fan is arranged outside the space formed by the combined wallboards, the ventilation pipe is arranged through the combined wallboards and extends into the space formed by the combined wallboards, and the outer wall of the combined wallboard connected with the ventilation pipe is provided with soundproof cotton.

[0024] By adopting the above technical scheme, the low-noise ventilation system is arranged, thereby reducing the vibration in the space surrounded by the ventilation pipe and the combined wallboards, and thereby reducing the generation of noise.

[0025] In summary, the application has at least one of the following beneficial technical effects:

[0026] 1. The flexible pipe is used to connect the elbow connected to the ventilator and the ventilation pipe, the vibration of the elbow is absorbed by the stacking part of the flexible pipe, so that the upper end of the flexible pipe is not easily vibrated during the vibration of the stacking part of the flexible pipe, thereby reducing the vibration of the ventilation pipe, and further reducing the decibel of the noise generated by the vibration of the ventilation pipe.

[0027] 2. The buffering piece can produce horizontal displacement between the connecting rod and the support plate, so that when the ventilation pipe produces horizontal vibration, the buffering piece can also reduce the horizontal vibration of the ventilation pipe, thereby further reducing the vibration amplitude of the ventilation pipe and reducing the decibels of the noise generated by the vibration of the ventilation pipe. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the low-noise ventilation system of the present application;

[0029] Figure 2 FIG. 2 is a structural schematic diagram of an embodiment of the low-noise ventilation system of the present application for showing the structure of the damping mechanism;

[0030] Figure 3 FIG. 3 is a structural schematic diagram of an embodiment of the low-noise ventilation system of the present application for showing the internal structure of the damping piece;

[0031] Figure 4 FIG. 4 is an enlarged view of part A of FIG. 3; Figure 3

[0032] Figure 5 FIG. 5 is a structural schematic diagram of an embodiment of the metering laboratory of the present application.

[0033] In the figure, 1 is a fan; 2 is a ventilation pipe; 3 is a flexible pipe; 31 is a support ring; 32 is a stacking position; 4 is an elbow pipe; 41 is a guide rod; 5 is a damping mechanism; 51 is a support plate; 52 is a connecting rod; 53 is a damping piece; 531 is a fixed column; 5311 is a guide groove; 532 is a plug-in block; 54 is a damping elastic piece; 55 is an abutting ring; 56 is an abutting plate; 6 is a buffering piece; 61 is a fixed rod; 62 is a buffering sleeve; 63 is a buffering spring; 64 is a roller; 7 is a combined wallboard; 71 is a protective door; 72 is a top wall; 73 is soundproof cotton. DETAILED DESCRIPTION

[0034] The present application will be further described in detail below in conjunction with the accompanying drawings.

[0035] The low-noise ventilation system disclosed in the present application, such as Figure 1 ​As shown, including the fan 1 and connected to the fan 1 on the ventilation pipe 2, ventilation pipe 2 and the fan 1 between the connection between the two connection mechanism, the connection mechanism includes one end fixed on the fan 1 outlet elbow 4 and connected to the elbow 4 on the other end of the flexible tube 3, elbow 4 both ends of the opening perpendicular to set, one end with the fan 1 using bolted, the other end of the opening upward and using the flexible tube 3 with a hoop connected to one end. Ventilation pipe 2 close to the fan 1 one end of the horizontal setting, and located above the elbow 4, the flexible tube 3 away from the elbow 4 one end of the flexible tube 2 using a hoop connected to. Flexible tube 3 along the length direction is provided with a plurality of support ring 31, adjacent support ring 31 between the gap. The lower end of the flexible tube 3 stacked on the upper end of the elbow 4, the flexible tube 3 at the stacking position between the parts of the support ring 31 towards the inside of the flexible tube 3 recessed, and the support ring 31 between the stacking position 32 close to each other and abutment. When the fan 1 work and produce vibration will drive the elbow 4 and the lower end of the flexible tube 3 vibration, in the lower end of the flexible tube 3 vibration, the stacking position 32 can be absorbed by the vibration and not easy to make the upper end of the flexible tube 3 vibration, and then through the stacking position 32 shock absorption, so that the upper end of the flexible tube 3 position is not easy to be affected by the lower end of the flexible tube 3 vibration, reduce the vibration of the ventilation pipe 2 after also correspondingly reduced the noise generated by the vibration of the ventilation pipe 2.

[0036] As shown in Figure 1 , because the lower end of the flexible tube 3 in the process of stacking, the overall position has not been defined, when the vibration amplitude increases, the flexible tube 3 of the stacking is easy to produce downward, thereby affecting the effect of shock absorption, therefore, the elbow 4 is vertical on the outer wall of the circumferential welding has a plurality of guide rod 41, the side wall of the guide rod 41 close to the axis of the elbow 4 upper end opening can be with the outer wall of the stacked flexible tube 3 abutment, thereby limiting the position of the stacked flexible tube 3, so that the flexible tube 3 can still maintain the state of stacking in the process of vibration, so that the shock absorption effect of the flexible tube 3 is not easy to be affected.

[0037] As shown in Figure 1 and Figure 2 and Figure 3As shown, in order to further reduce the vibration of the ventilation pipe 2, the ventilation pipe 2 is also provided with a damping mechanism 5 along its length direction to slow down the vibration, the damping mechanism 5 includes a support plate 51 arranged below the ventilation pipe 2, a plurality of connecting rods 52 connected to the four corners of the support plate 51, a plurality of damping members 53 slidingly arranged on the support plate 51, and a damping elastic member 54 for slowing down the vibration, the horizontal section of the connecting rod 52 is rectangular, and the side wall thereof can abut against the outer wall of the flexible pipe 3. The ventilation pipe 2 is fixed to the upper end of the support plate 51 by using a hoop, and a rubber pad is arranged between the ventilation pipe 2 and the support plate 51. The damping member 53 includes a fixed column 531 and a splicing block 532 spliced on the fixed column 531, the fixed column 531 is arranged vertically and penetrates the support plate 51, and the fixed column 531 and the support plate 51 are slidingly matched, and the upper projection view of the inner cavity of the fixed column 531 is a square. Four inner walls of the inner cavity of the fixed column 531 are provided with horizontally arranged guide grooves 5311, the guide grooves 5311 penetrate the upper end surface of the fixed column 531, and the guide grooves 5311 on the same fixed column 531 are communicated with each other. The splicing block 532 is a rectangular ring structure, an abutting ring 55 is fixed to the outer wall of the upper end of the splicing block 532, the splicing block 532 can be inserted into the guide groove 5311, and when the abutting ring 55 on the splicing block 532 abuts against the upper end of the fixed column 531, a gap is left between the lower end of the splicing block 532 and the bottom surface of the guide groove 5311, and a plurality of bolts for fixing the splicing block 532 are threadedly connected to the outer wall of the splicing block 532. The lower end of the fixed column 531 is coaxially fixed with the abutting ring 55 which is coincident with the outer ring of the abutting ring 55 connected to the splicing block 532, and the abutting rings 55 located on the upper and lower sides of the fixed column 531 are located on the upper and lower sides of the support plate 51 respectively. The damping elastic member 54 is sleeved on the fixed column 531 and located on the upper and lower sides of the support plate 51 respectively, and the damping elastic member 54 is selected as a spring in this embodiment, one end of the damping elastic member 54 abuts against the upper and lower side walls of the support plate 51 respectively, and the other end of the damping elastic member 54 abuts against the end surfaces of the two support rings 31 which are close to each other. The damping elastic member 54 enables the support plate 51 to move vertically, so that the ventilation pipe 2 can slow down when subjected to vertical force, thereby reducing the vibration of the ventilation pipe 2, and correspondingly reducing the noise generated by the vibration of the ventilation pipe 2.

[0038] As Figure 4As shown, to further reduce the vibration of the ventilation duct 2, the inner cavity of the fixed column 531 is also provided with several buffer members 6 to mitigate horizontal vibration. Each buffer member 6 is connected to the connecting rod 52. The connecting rod 52 passes through the inner cavity of the fixed column 531, and the axis of the connecting rod 52 coincides with the axis of the fixed column 531. Four buffer members 6 are arranged circumferentially around the axis of the connecting rod 52. Each buffer member 6 includes a fixed rod 61 fixed to the connecting rod 52, a buffer sleeve 62 sleeved outside the fixed rod 61, and a buffer spring 63 disposed within the buffer sleeve 62. The buffer sleeve 62 is open at one end. The end of the fixed rod 61 away from the connecting rod 52 slides within the buffer sleeve 62, and the end of the buffer sleeve 62 away from the connecting rod 52 can be inserted into the guide groove 5311, allowing the buffer sleeve to slide horizontally along the guide groove 5311. One end of the buffer spring 63 abuts against the end of the fixed rod 61 away from the connecting rod 52, and the other end of the buffer spring 63 abuts against the bottom surface of the inner cavity of the buffer sleeve 62. Thus, when the connecting rod 52 is positioned inside the fixed column 531 and is not under force, the axis of the connecting rod 52 coincides with the axis of the fixed column 531. When the support plate 51 vibrates, the support plate 51 can move arbitrarily in the horizontal direction, thereby mitigating the vibration of the support plate 51 in the horizontal direction, further reducing the vibration of the ventilation pipe 2, and thus reducing the noise generated by the vibration of the ventilation pipe 2.

[0039] like Figure 3 As shown, to facilitate smoother sliding of the buffer sleeve 62 within the guide groove 5311, a roller 64 is rotatably connected to the end of the buffer sleeve 62 away from the connecting rod 52 via a bearing. The roller 64 can slide within the guide groove 5311, and its sidewall can abut against the bottom surface of the guide groove 5311 or the lower end surface of the locking block 532, respectively. The roller 64 reduces the friction between the buffer sleeve 62 and the shock absorber 53, making the buffering process of the buffer member 6 less susceptible to interference.

[0040] like Figure 2 As shown, since the connecting rod 52 is connected to the support plate 51 through the buffer sleeve 62, the buffer sleeve 62 and the fixing rod 531 are prone to deformation under stress, thus affecting their shock absorption effect on the ventilation pipe 2. Therefore, two abutment plates 56 are coaxially fixed to the connecting rod 52 with bolts. The two abutment plates 56 are respectively set at the upper and lower ends of the shock absorber 53, and the two abutment plates 56 abut against the opposite ends of the two abutment rings 55. The sidewalls of the abutment plates 56 that contact the abutment rings 55 are coated with graphite. Thus, the weight of the support plate 51 is supported by the abutment plates 56, reducing the weight borne by the fixing rod 61 and the buffer sleeve 62, making the use of the fixing rod 61 and the buffer sleeve 62 less affected.

[0041] The implementation principle of this embodiment is as follows: when the fan 1 is working and vibrates, the stacking position 32 of the flexible tube 3 absorbs part of the vibration, thereby reducing the vibration transmitted from the flexible tube 3 to the ventilation tube 2. Then, when the ventilation tube 2 vibrates, the buffer 6 and the shock-absorbing spring reduce the vibration in all directions of the ventilation tube 2.

[0042] A metrology laboratory, such as Figure 5 As shown, the system includes several modular wall panels 7, a top wall 72 positioned above the modular wall panels 7, a protective door 71 mounted on one of the modular wall panels 7, and a low-noise ventilation system connected to the modular wall panels 7. The modular wall panels 7 are bolted together to form a space, and the top wall 72 is directly bolted to the upper end of the modular wall panels 7. A fan 1 is located outside the space formed by the modular wall panels 7, and a ventilation duct 2 passes through one of the modular wall panels 7 and extends into the space enclosed by the modular wall panels 7. Sound insulation cotton 73 is installed on the outer wall of the modular wall panel 7 through which the ventilation duct passes, and the upper end of the connecting rod 52 is fixed to the lower end of the top wall 72 with expansion bolts.

[0043] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-noise ventilation system, comprising a fan (1) and a ventilation duct (2) connected to the fan (1), characterized in that: A connecting mechanism is provided between the ventilation pipe (2) and the fan (1) to connect the two. The connecting mechanism includes a bend (4) connected to the fan (1) and a flexible pipe (3) set on the bend (4). One end of the bend (4) is connected to the fan (1), and the other end of the bend (4) is set vertically upward and connected to the flexible pipe (3). The end of the flexible pipe (3) away from the bend (4) is connected to the ventilation pipe (2). The end of the ventilation pipe (2) connected to the flexible pipe (3) is set horizontally. Several support rings (31) are set inside the flexible pipe (3) along its length direction. There is a gap between adjacent support rings (31). The lower end of the flexible pipe (3) is stacked. The part of the flexible pipe (3) at the stacked position between the support rings (31) is recessed towards the inside of the flexible pipe (3), and the support rings (31) at the stacked position are close to each other and abut against each other.

2. The low-noise ventilation system according to claim 1, characterized in that: The bend (4) has several guide rods (41) arranged circumferentially on its vertical outer wall, and the guide rods (41) can abut against the outer wall of the flexible tube (3).

3. The low-noise ventilation system according to claim 2, characterized in that: The ventilation pipe (2) is also provided with several damping mechanisms (5) to reduce its vibration. The damping mechanism (5) includes a support plate (51) located below the ventilation pipe (2), several connecting rods (52) connected to the four corners of the support plate (51), several damping components (53) sliding through the support plate (51), and several damping elastic components (54) to reduce vibration. The ventilation pipe (2) is fixed to the upper end of the support plate (51). The connecting rods (52) are respectively connected to the damping components (53). Both ends of the damping components (53) are provided with abutment rings (55). The damping elastic components (54) are sleeved on the damping components (53) and are respectively located on the upper and lower sides of the support plate (51). One end of each damping elastic component (54) is connected to the support plate (51), and the other end of each damping elastic component (54) is connected to the abutment rings (55).

4. The low-noise ventilation system according to claim 3, characterized in that: The shock absorber (53) is open at both ends. The connecting rod (52) passes through the shock absorber (53). Several buffers (6) are arranged circumferentially along the axis of the connecting rod (52) inside the shock absorber (53). One end of the buffer (6) is connected to the inner wall of the shock absorber (53), and the other end of the buffer (6) is connected to the connecting rod (52).

5. The low-noise ventilation system according to claim 4, characterized in that: The buffer component (6) includes a fixed rod (61) fixed to the support rod, a buffer sleeve (62) sleeved outside the fixed rod (61), and a buffer spring (63) disposed inside the buffer sleeve (62). The end of the fixed rod (61) away from the connecting rod (52) is inserted into the buffer sleeve (62) and abuts against the buffer spring (63). The inner cavity sidewall of the shock absorber (53) is provided with interconnected guide grooves (5311). The end of the buffer sleeve (62) away from the connecting rod (52) is inserted into the guide groove (5311) and can slide along the guide groove (5311).

6. The low-noise ventilation system according to claim 5, characterized in that: Each buffer sleeve (62) is rotatably connected to a roller (64), which is disposed in a guide groove (5311) and the side wall of the roller (64) abuts against the inner wall of the guide groove (5311).

7. The low-noise ventilation system according to claim 4, characterized in that: The upper projection view of the inner cavity of the shock absorber (53) is rectangular.

8. The low-noise ventilation system according to claim 5, characterized in that: The connecting rod (52) is fixed with several abutment plates (56), and the side walls of the abutment plates (56) that are close to each other can abut against the upper and lower end surfaces of the shock absorber (53) respectively.

9. A metrology laboratory, employing the low-noise ventilation system according to any one of claims 1-8, characterized in that: It includes several combined wall panels (7), a top wall (72) set above the combined wall panels (7), a protective door (71) set on the combined wall panels (7) and a low-noise ventilation system. The fan (1) is set outside the space formed by the combined wall panels (7), the ventilation pipe (2) passes through the combined wall panels (7) and extends into the space formed by the combined wall panels (7), and the outer wall of the combined wall panels (7) connected to the ventilation pipe (2) is provided with sound insulation cotton (73).

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