Ventilator base anti-creep device

Abstract

The utility model relates to the technical field of ventilator, especially a ventilator base anti -churning device, it includes base, support and casing, the base with the support is connected through the fixed mechanism, the base with the casing is connected through the connecting mechanism, still install the limiting mechanism on the base, the limiting mechanism includes first fixed plate, first fixed plate fixed connection is established on the base, the support fixedly connected with second fixed plate, the first fixed plate is installed with displacement sensor through the installation subassembly, the displacement sensor is vibration - displacement double -mode sensor, its signal line accesses fan control system, the displacement sensor far away signal line one end is tightly pressed on the second fixed plate. The present application has the effect that the relative churning between the base and the support and the casing occurs.

Description

Technical Field

[0001] This utility model relates to the technical field of ventilation fans, and in particular to a ventilation fan base anti-slip device. Background Technology

[0002] In the existing D-type centrifugal fan structure, the support frame and base are connected by bolts, the bearing housing is fixed on the support frame and carries the impeller, and the air inlet is fixed to the casing and installed as a whole on the base. However, during transportation, vibrations can cause relative movement between the support frame, casing and base. The displacement of the support frame and casing will drive the impeller and air inlet to move respectively, which will change the fitting gap between the impeller and air inlet, increase internal leakage, and reduce fan efficiency. Furthermore, the gap needs to be recalibrated when transported to the installation site, and there is a lack of means to monitor displacement during transportation. Utility Model Content

[0003] In order to reduce the probability of relative movement between the base, the bracket, and the housing, this application provides a fan base anti-movement device.

[0004] This application provides a fan base anti-movement device, which adopts the following technical solution: A fan base anti-slip device includes a base, a bracket, and a housing. The base and the bracket are connected by a fixing mechanism, and the base and the housing are connected by a connecting mechanism. A limiting mechanism is also installed on the base. The limiting mechanism includes a first fixing plate, which is fixedly connected to the base. A second fixing plate is fixedly connected to the bracket. A displacement sensor is installed on the first fixing plate by a mounting assembly. The displacement sensor is a vibration-displacement dual-mode sensor, and its signal line is connected to the fan control system. The end of the displacement sensor away from the signal line is pressed against the second fixing plate.

[0005] By adopting the above technical solution, the displacement sensor, as a physical stop, works in conjunction with the first and second fixed plates to reduce the probability of relative displacement between the bracket and the base. The sensor also monitors the vibration data of the bracket in real time and triggers an alarm when the amplitude exceeds the threshold. Furthermore, the traditional single-function bolt connection is improved into a composite structure of mechanical limit and intelligent monitoring, which simultaneously achieves anti-loosening during transportation and vibration monitoring during operation through the displacement sensor.

[0006] Optionally, the first fixing plate has a first through groove, the mounting assembly includes a limiting nut, the limiting nut is fixedly connected in the first through groove, the displacement sensor is fixedly connected to a fixing shell, the outer side wall of the fixing shell has a thread adapted to the limiting nut, and the fixing shell is threadedly connected in the limiting nut.

[0007] By adopting the above technical solution, the setting of the limit nut and the fixing shell realizes the installation and fixation of the displacement sensor. At the same time, the threaded connection makes the installation and disassembly of the displacement sensor more convenient, thereby reducing the maintenance cost in the later stage.

[0008] Optionally, the first fixing plate has a second through slot, the displacement sensor is inserted into the second through slot, the mounting assembly includes a fixing ring, the fixing ring is fixedly connected to the displacement sensor, the side wall of the fixing ring has multiple through holes, the end face of the first fixing plate away from the second fixing plate has multiple screw holes, the mounting assembly also includes multiple connecting bolts, the multiple connecting bolts pass through the multiple through holes and are threaded into the multiple screw holes respectively.

[0009] By adopting the above technical solution, the setting of the fixing ring and connecting bolts realizes the fixation of the displacement sensor, and at the same time makes the installation and disassembly of the displacement sensor more convenient, thereby reducing the maintenance cost in the later stage.

[0010] Optionally, the limiting mechanism further includes an auxiliary component, which includes a third fixing plate fixedly connected to the base. A fourth fixing plate is also fixedly connected to the bracket. A third through groove is provided on the end faces of the first fixing plate and the third fixing plate that are close to each other. An auxiliary nut is fixedly connected to each of the two third through grooves. An auxiliary bolt is threaded into the auxiliary nut. The ends of the two auxiliary bolts that are close to each other abut against the second fixing plate and the fourth fixing plate, respectively.

[0011] By adopting the above technical solution, the auxiliary bolts further limit the position of the base and the bracket, thereby making the base and the bracket more secure and further reducing the probability of relative movement between the base and the bracket.

[0012] Optionally, the fixing mechanism includes multiple fixing bolts, each of which passes through the base and the bracket in sequence and is threaded with a fixing nut. An elastic washer is also fitted on each fixing bolt, and the elastic washer is located between the fixing nut and the bracket.

[0013] By adopting the above technical solution, the setting of fixing bolts and fixing nuts realizes the fixed connection between the bracket and the base, while the setting of elastic washers reduces the probability of the fixing bolts loosening due to vibration.

[0014] Optionally, a wedge-shaped groove is provided on the end face of the base near the bracket, the connecting mechanism includes a wedge block, the wedge block is inserted into the wedge-shaped groove and fixedly connected to the housing, and an anti-detachment component is also provided on the base.

[0015] By adopting the above technical solution, the wedge block reduces the probability of longitudinal movement between the casing and the base, thereby reducing the probability of longitudinal relative movement between the impeller and the air inlet, which would cause changes in the fitting gap between the impeller and the air inlet, and thus reducing the probability of reduced fan efficiency.

[0016] Optionally, two slots are provided on each side wall of the base, and a limiting groove is provided on the top wall of the slot. The anti-detachment component includes a U-shaped limiting block, which is inserted into the two slots on the same side. A first sliding groove is provided on the top wall of the U-shaped limiting block, and a second sliding groove is provided on the bottom wall of the first sliding groove. Two third sliding grooves communicating with the second sliding groove are also provided on the top wall of the U-shaped limiting block. A U-shaped connecting plate is slidably connected in the second sliding groove. A pressing block is slidably connected in the first sliding groove and is fixedly connected to the U-shaped connecting plate. A limiting rod is slidably connected in the third sliding groove and is fixedly connected to the U-shaped connecting plate. Multiple springs are fixedly connected to the bottom wall of the second sliding groove, and the other end of the spring is fixedly connected to the U-shaped connecting plate.

[0017] By adopting the above technical solution, after the wedge block is installed, the U-shaped limiting block is manually inserted into the slot. At this time, the spring drives the limiting rod to be inserted into the limiting groove through the U-shaped connecting plate, thereby achieving lateral limiting of the wedge block and reducing the probability of lateral movement between the housing and the base.

[0018] In summary, this application includes the following beneficial technical effects: 1. As a physical stop, the displacement sensor, in conjunction with the first and second fixed plates, reduces the probability of relative displacement between the bracket and the base. The sensor also monitors the vibration data of the bracket in real time and triggers an alarm when the amplitude exceeds the threshold. This improves the traditional single-function bolt connection into a composite structure of mechanical limit and intelligent monitoring, enabling both anti-loosening during transportation and vibration monitoring during operation through the displacement sensor. 2. The setting of limit nut and fixing shell realizes the installation and fixation of displacement sensor, and the threaded connection also makes the installation and disassembly of displacement sensor more convenient, thereby reducing the maintenance cost in the later stage; 3. The auxiliary bolts further limit the position of the base and the bracket, making the base and the bracket more secure and further reducing the probability of relative movement between the base and the bracket. 4. The wedge block reduces the probability of longitudinal movement between the casing and the base, which in turn reduces the probability of longitudinal relative movement between the impeller and the air inlet, causing changes in the fitting gap between the impeller and the air inlet, and thus reducing the probability of reduced fan efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the anti-slip device for the fan base in Embodiment 1 of this application; Figure 2 For this application Figure 1 Enlarged view of section A; Figure 3 For this application Figure 2 Enlarged view of section B; Figure 4 This is a schematic diagram of the connecting mechanism in Embodiment 1 of this application; Figure 5 This is a cross-sectional view of the anti-detachment component in Embodiment 1 of this application; Figure 6 This is a schematic diagram of the installation components in Embodiment 2 of this application.

[0020] Reference numerals: 1. Base; 11. Wedge groove; 12. Slot; 13. Limiting groove; 2. Bracket; 3. Housing; 4. Fixing mechanism; 41. Fixing bolt; 42. Fixing nut; 43. Elastic washer; 5. Connecting mechanism; 51. Wedge block; 52. Anti-detachment component; 521. U-shaped limiting block; 522. U-shaped connecting plate; 523. Spring; 524. Limiting rod; 525. Pressing block; 526. First slide groove; 527. Second slide groove; 528. Third slide groove; 6. Limiting mechanism; 61. Displacement sensor; 62. First fixing plate; 63. Second fixing plate; 64. Mounting component; 641. Limiting nut; 642. Fixing shell; 643. Fixing ring; 644. Connecting bolt; 65. Auxiliary component; 651. Third fixing plate; 652. Fourth fixing plate; 653. Auxiliary bolt; 654. Auxiliary nut. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0022] This application discloses a device for preventing the base of a ventilation fan from shifting.

[0023] Example 1: refer to Figure 1 and Figure 2 The anti-movement device for the fan base includes a base 1, a bracket 2 installed on the base 1 via a fixing mechanism 4, a housing 3 installed on the base 1 via a connecting mechanism 5, and a limiting mechanism 6 installed on the base 1 to reduce relative movement between the base 1 and the bracket 2.

[0024] The fixing mechanism 4 includes multiple fixing bolts 41, which pass through the base 1 and the bracket 2 in sequence and are threadedly connected to fixing nuts 42. Elastic washers 43 are also fitted on the fixing bolts 41, and the elastic washers 43 are located between the fixing nuts 42 and the bracket 2.

[0025] The fixing bolt 41 and fixing nut 42 achieve a fixed connection between the bracket 2 and the base 1, while the setting of the elastic washer 43 reduces the probability of the fixing bolt 41 loosening due to vibration.

[0026] refer to Figure 3 The limiting mechanism 6 includes a first fixing plate 62, which is fixedly connected to the base 1. A second fixing plate 63 is fixedly connected to the bracket 2. A displacement sensor 61 is mounted on the first fixing plate 62 via an mounting assembly 64. The displacement sensor 61 is a vibration-displacement dual-mode sensor, and its signal line is connected to the fan control system. The end of the displacement sensor 61 away from the signal line is pressed against the second fixing plate 63. A first through groove is provided on the first fixing plate 62. The mounting assembly 64 includes a limiting nut 641, which is fixedly connected in the first through groove. A fixing shell 642 is fixedly connected to the outside of the displacement sensor 61. A thread adapted to the limiting nut 641 is provided on the outer side wall of the fixing shell 642, and the fixing shell 642 is threadedly connected to the limiting nut 641.

[0027] As a physical stop, the displacement sensor 61, in conjunction with the first fixed plate 62 and the second fixed plate 63, reduces the probability of relative displacement between the bracket 2 and the base 1. The sensor also monitors the vibration data of the bracket 2 in real time, triggering an alarm when the amplitude exceeds a threshold. This transforms the traditional single-function bolt connection into a composite structure of mechanical limit and intelligent monitoring, simultaneously achieving anti-loosening during transport and vibration monitoring during operation through the displacement sensor 61. Furthermore, the setting of the limit nut 641 and the fixing shell 642 ensures the installation and fixation of the displacement sensor 61, while the threaded connection makes installation and disassembly of the displacement sensor 61 more convenient, thereby reducing subsequent maintenance costs.

[0028] The limiting mechanism 6 also includes an auxiliary component 65, which includes a third fixing plate 651. The third fixing plate 651 is fixedly connected to the base 1, and a fourth fixing plate 652 is fixedly connected to the bracket 2. A third through groove is provided on the end faces of the first fixing plate 62 and the third fixing plate 651 that are close to each other. An auxiliary nut 654 is fixedly connected to each of the two third through grooves. An auxiliary bolt 653 is threaded into the auxiliary nut 654. The ends of the two auxiliary bolts 653 that are close to each other abut against the second fixing plate 63 and the fourth fixing plate 652, respectively.

[0029] The auxiliary bolt 653 further limits the position of the base 1 and the bracket 2, thereby making the fixation of the base 1 and the bracket 2 more stable, and further reducing the probability of relative movement between the base 1 and the bracket 2.

[0030] refer to Figure 4 and Figure 5A wedge-shaped groove 11 is provided on the end face of the base 1 near the support 2. The connecting mechanism 5 includes a wedge-shaped block 51, which is inserted into the wedge-shaped groove 11 and fixedly connected to the housing 3. An anti-detachment component 52 is also provided on the base 1. Two slots 12 are provided on the side walls on both sides of the base 1. A limit groove 13 is provided on the top wall of the slot 12. The anti-detachment component 52 includes a U-shaped limit block 521, which is inserted into the two slots 12 on the same side. A first sliding groove 526 is provided on the top wall of the U-shaped limit block 521, and a second sliding groove 526 is provided on the bottom wall of the first sliding groove 526. The top wall of the U-shaped limiting block 521 in the groove 527 is also provided with two third sliding grooves 528 that communicate with the second sliding groove 527. A U-shaped connecting plate 522 is slidably connected in the second sliding groove 527. A pressing block 525 is slidably connected in the first sliding groove 526. The pressing block 525 is fixedly connected to the U-shaped connecting plate 522. A limiting rod 524 is slidably connected in the third sliding groove 528. The limiting rod 524 is fixedly connected to the U-shaped connecting plate 522. Multiple springs 523 are fixedly connected to the bottom wall of the second sliding groove 527. The other end of the springs 523 is fixedly connected to the U-shaped connecting plate 522.

[0031] The wedge block 51 reduces the probability of longitudinal movement between the casing 3 and the base 1, thereby reducing the probability of longitudinal relative movement between the impeller and the air inlet, which would cause changes in the fitting gap between the impeller and the air inlet, and thus reducing the probability of reduced fan efficiency. At the same time, after the wedge block 51 is installed, the U-shaped limiting block 521 is manually inserted into the slot 12. At this time, the spring 523 drives the limiting rod 524 to be inserted into the limiting groove 13 through the U-shaped connecting plate 522, thereby achieving lateral limiting of the wedge block 51 and reducing the probability of lateral movement between the casing 3 and the base 1.

[0032] Example 2: refer to Figure 6 The difference between this embodiment and Embodiment 1 is that a second through slot is provided on the first fixing plate 62, the displacement sensor 61 is inserted into the second through slot, and the mounting assembly 64 includes a fixing ring 643, which is fixedly connected to the displacement sensor 61. The side wall of the fixing ring 643 has multiple through holes, and the end face of the first fixing plate 62 away from the second fixing plate 63 has multiple screw holes. The mounting assembly 64 also includes multiple connecting bolts 644, which are threaded through the multiple through holes and connected to the multiple screw holes. The setting of the fixing ring 643 and the connecting bolts 644 realizes the fixation of the displacement sensor 61, and also makes the installation and disassembly of the displacement sensor 61 more convenient, thereby reducing the later maintenance cost.

[0033] The above are all 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.

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