A fixed plate for air outlet of ventilation duct

Abstract

The utility model relates to fixing plate spare technical field especially, relates to a ventilation pipeline air outlet fixing plate spare. The utility model provides such a ventilation pipeline air outlet fixing plate spare, including ventilation pipeline, air outlet, upper mounting plate, lower mounting plate, guide rod, support frame, back spring and clamping block, the upper mounting plate is fixedly connected to the ventilation pipeline lower end port outer peripheral surface, the lower mounting plate is fixedly connected to the air outlet outer peripheral surface, and the air outlet is detachably installed in the ventilation pipeline lower end port through the cooperation of lower mounting plate and upper mounting plate. Through the accurate guide cooperation of guide rod and through groove, the quick alignment of air outlet and ventilation pipeline is realized, the initial locking is automatically completed by back spring drive clamping block, and installation fixing can be realized without complex tools, and the linkage structure of adjusting screw rod and push plate is combined, and the constraint of both sides clamping block can be simultaneously removed by single operation, and the automatic reset of cooperation torsion spring drive rotating block, the installation and removal operation time is greatly shortened, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of fixing plate technology, and in particular to a fixing plate for the air outlet of a ventilation duct. Background Technology

[0002] In building ventilation systems and industrial ventilation projects, the connection and fixing of ventilation ducts and air outlets is a critical aspect of system installation, and its reliability directly affects ventilation efficiency and system safety. Currently, the installation methods for ventilation duct air outlets are mainly divided into two categories: one is to use flanges and bolts for connection, where the air outlet flange and the duct flange are rigidly fastened together by circumferentially distributed bolts; the other is to use a simple snap-fit ​​connection, which uses the cooperation of elastic claws and slots to achieve quick fixing.

[0003] However, existing technologies have the following obvious drawbacks: flange bolt connections require tightening or loosening of the circumferential bolts one by one, which is cumbersome and time-consuming, especially in high-altitude operations or confined spaces where tool use is limited, resulting in high installation and subsequent maintenance costs; although traditional snap-fit ​​structures are easy to install, disassembly requires releasing the clamps one by one, lacking a synchronous operation mechanism, resulting in low efficiency. Furthermore, when the ventilation system is running, the fan vibration will be transmitted to the duct and air outlet. Under long-term vibration, the traditional snap-fit ​​structure is prone to loosening of the clamps, and the bolts of the flange connection may also loosen due to vibration, posing a safety hazard. Utility Model Content

[0004] To overcome the aforementioned drawbacks, this utility model provides a fixing plate for the air outlet of a ventilation duct.

[0005] Technical Solution: A fixing plate for a ventilation duct outlet includes a ventilation duct, an outlet, an upper mounting plate, a lower mounting plate, guide rods, support frames, return springs, and locking blocks. The upper mounting plate is fixedly connected to the outer periphery of the lower end of the ventilation duct, and the lower mounting plate is correspondingly fixedly connected to the outer periphery of the outlet. The outlet is detachably installed at the lower end of the ventilation duct through the cooperation of the lower mounting plate and the upper mounting plate. Guide rods are vertically fixed at the four corners of the top of the lower mounting plate. Corresponding slots are provided on the upper mounting plate. The guide rods and slots form a clearance fit and slide into each other. Support frames are symmetrically connected to the front and rear sides of the lower mounting plate. Locking blocks are slidably connected to the support frames. Two return springs are connected between the locking blocks and the support frames. The top surface of the locking blocks is machined with an outward-facing bevel. A notch is provided on the upper mounting plate at the position corresponding to the locking blocks.

[0006] As an improvement to the above solution, an annular sealing ring is provided between the upper mounting plate and the lower mounting plate, and the sealing ring is made of silicone rubber.

[0007] As an improvement to the above scheme, the angle α between the inclined surface and the vertical surface of the card block is 30° to 60°, and the surface of the card block is plated with hard chrome.

[0008] As an improvement to the above solution, it also includes an adjusting screw and a push plate. The adjusting screw is rotatably connected to the center of the front and rear sides of the top of the upper mounting plate. The push plate is threadedly connected to the adjusting screw. The bottom surface of the push plate slides against the top surface of the upper mounting plate to form a guide limit. The end of the push plate forms a contactable engagement with the locking block.

[0009] As an improvement to the above solution, it also includes a fixed block and a rotating block. Fixed blocks are symmetrically installed on the front and rear sides of the top of the upper mounting plate. The rotating block is rotatably connected to the upper part of the fixed block. In the initial state, the rotating block is arranged horizontally, and its free end forms a rigid contact with the inner side of the corresponding side block.

[0010] As an improvement to the above solution, it also includes a torsion spring and a locking screw. The torsion spring is sleeved on the outside of the pin shaft, and its two ends are fixed to the fixed block and the rotating block respectively. In the initial state, the torsion spring is in a torsional deformation state. The locking screw is connected to the middle of the rotating block through a vertical thread. The upper mounting plate and the lower mounting plate have through threaded holes at the axial position of the locking screw, and the locking screw and the threaded hole form a threaded connection.

[0011] Beneficial effects: 1. The precise guidance and cooperation between the guide rod and the through groove enables rapid alignment of the air outlet and the ventilation duct; the return spring drives the locking block to automatically complete the initial locking, achieving installation and fixation without complicated tools; combined with the linkage structure of the adjusting screw and the push plate, a single operation can simultaneously release the constraints of the locking blocks on both sides, and the torsion spring drives the rotating block to automatically reset, greatly shortening the assembly and disassembly time and improving construction efficiency.

[0012] 2. It adopts a dual locking structure of "block-notch" and "rotating block contact", combined with the preload of the return spring and the constraint of the torsion spring, which effectively prevents the block from radially displacing due to vibration; the locking screw passes through the upper and lower mounting plates to form a rigid fastening, integrating the split structure into a whole bearing the force, significantly enhancing the anti-loosening performance, and can adapt to the vibration environment when the ventilation system is running. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a cross-sectional view of the upper mounting plate and lower mounting plate components of this utility model.

[0015] Figure 3 This is a three-dimensional structural diagram of the components of this utility model, including the locking block, adjusting screw, and push plate.

[0016] Figure 4 This is a cross-sectional view of the upper mounting plate, lower mounting plate, and rotating block components of this utility model.

[0017] The labels in the diagram are as follows: 1. Ventilation duct, 2. Air outlet, 3. Upper mounting plate, 4. Lower mounting plate, 5. Guide rod, 6. Support frame, 7. Return spring, 8. Locking block, 9. Adjusting screw, 10. Push plate, 11. Fixing block, 12. Torsion spring, 13. Rotating block, 14. Locking screw. Detailed Implementation

[0018] Example: A fixing plate for the air outlet of a ventilation duct, such as Figures 1-2 As shown, the system includes a ventilation duct 1, an air outlet 2, an upper mounting plate 3, a lower mounting plate 4, guide rods 5, a support frame 6, a return spring 7, and a locking block 8. The upper mounting plate 3 is fixedly connected to the outer circumference of the lower end of the ventilation duct 1, and the lower mounting plate 4 is correspondingly fixedly connected to the outer circumference of the air outlet 2. The air outlet 2 is detachably installed at the lower end of the ventilation duct 1 through the cooperation of the lower mounting plate 4 and the upper mounting plate 3. An annular sealing ring made of silicone rubber is provided between the upper mounting plate 3 and the lower mounting plate 4 to achieve dynamic sealing. Guide rods 5 are vertically fixed at the four corners of the top of the lower mounting plate 4, and through grooves are opened at corresponding positions on the upper mounting plate 3. The guide rod 5 and the through groove form a clearance fit and slide into each other. The guide rod 5 and the through groove guide the upper mounting plate 3 and the lower mounting plate 4 to achieve precise axial positioning. The lower mounting plate 4 has support frames 6 welded symmetrically on the front and rear sides. The support frames 6 are slidably connected to the support frames 6. Two return springs 7 are connected axially parallel between the support frames 6 and the support frames 6. The top surface of the support frame 8 is machined with an outward bevel. The upper mounting plate 3 has a notch at the position corresponding to the support frame 8. The angle α between the bevel of the support frame 8 and the vertical plane is 30° to 60°. The surface of the support frame 8 is hard chrome plated to reduce sliding wear and extend the service life of the support frame 8.

[0019] like Figure 3 As shown, it also includes an adjusting screw 9 and a push plate 10. The adjusting screw 9 is rotatably connected to the center of the front and rear sides of the top of the upper mounting plate 3 through a bearing seat. The push plate 10 is threadedly connected to the adjusting screw 9. The bottom surface of the push plate 10 slides and fits against the top surface of the upper mounting plate 3 to form a guide limit. The length of the push plate 10 covers the distance between the two locking blocks 8 on the same side. The end of the push plate 10 forms a contactable engagement relationship with the locking block 8.

[0020] During installation, align the air outlet 2 axially with the lower end of the ventilation duct 1, align the guide rod 5 of the lower mounting plate 4 with the through groove of the upper mounting plate 3 and insert it. The clearance fit between the guide rod 5 and the through groove ensures the verticality of the installation. Continuously apply axial force to bring the two closer together. The guide slope of the locking block 8 contacts the notch edge of the upper mounting plate 3 and generates a radial force, forcing the locking block 8 to slide inward along the support frame 6. The return spring 7 is compressed simultaneously. When the locking block 8 completely passes the notch position, the return spring 7 releases elastic potential energy to drive the locking block 8 to slide outward along the support frame 6. Finally, the locking block 8 is engaged with the top surface of the upper mounting plate 3, achieving rigid locking between the upper mounting plate 3 and the lower mounting plate 4, and completing the rapid installation of the air outlet 2. During disassembly, by rotating the adjusting screw 9, the push plate 10 is driven to move horizontally along the top surface of the upper mounting plate 3 via the threaded transmission. The end of the push plate 10 contacts and pushes the two locking blocks 8 on the same side to slide inward against the elastic force of the return spring 7, so that the locking blocks 8 disengage from the locking engagement with the upper mounting plate 3. After the locking state is released, the upper mounting plate 3 and the lower mounting plate 4 are separated axially, and the air outlet 2 can be disassembled. After the operation is completed, the adjusting screw 9 is rotated in the opposite direction to drive the push plate 10 to return to the initial position.

[0021] like Figure 4 As shown, it also includes a fixed block 11, a torsion spring 12, a rotating block 13, and a locking screw 14. Fixed blocks 11 are symmetrically welded to the front and rear sides of the top of the upper mounting plate 3. The upper part of the fixed block 11 is rotatably connected to the rotating block 13 via a pin. In the initial state, the rotating block 13 is horizontally arranged, and its free end rigidly contacts the inner surface of the corresponding side locking block 8, forming a radial limiting constraint structure for the locking block 8. The torsion spring 12 is sleeved on the outside of the pin, and its two ends are fixedly connected to the fixed block 11 and the rotating block 13 respectively. In the initial state, the torsion spring 12 is in a torsional deformation state. The middle of the rotating block 13 is connected to a locking screw 14 through a vertical thread. The upper mounting plate 3 and the lower mounting plate 4 are provided with through threaded holes at the axial positions of the locking screw 14. The locking screw 14 and the threaded hole form a threaded connection. The upper mounting plate 3 and the lower mounting plate 4 are rigidly fastened by the axial preload of the locking screw 14. At the same time, the deformation state of the torsion spring 12 is maintained by the contact between the head of the locking screw 14 and the rotating block 13.

[0022] After the initial snap-fit ​​installation at the air outlet 2 is completed, the rotating block 13 remains horizontal under the constraint of the locking screw 14. Its free end abuts against the inner side of the locking block 8 to form a secondary limit, which forms a reverse constraint with the preload of the return spring 7, effectively preventing the locking block 8 from radial displacement due to vibration. The locking screw 14 is rigidly fastened into a whole by a threaded connection that passes through the upper and lower mounting plates 4, significantly improving the anti-loosening performance of the connection structure. During disassembly, first loosen and remove the locking screw 14 to release the axial constraint on the rotating block 13, and the torsion spring 12 releases its torque. The change in situation causes the rotating block 13 to rotate upward around the pin axis to a vertical position, releasing the radial contact with the locking block 8. At this time, the adjusting screw 9 can be operated according to the aforementioned disassembly process to push the locking block 8 to complete the unlocking and separation. When reinstalling, after the locking block 8 completes the initial engagement, manually overcome the spring force of the torsion spring 12 to rotate the rotating block 13 downward to a horizontal position, so that its free end contacts the inner side of the locking block 8 again. Then, screw the locking screw 14 into the threaded hole and tighten it. The preload of the thread fixes the posture of the rotating block 13, and at the same time, the upper and lower mounting plates 4 are tightened for the second time.

Claims

1. A fixing plate for the air outlet of a ventilation duct, characterized in that: The system includes a ventilation duct (1), an air outlet (2), an upper mounting plate (3), a lower mounting plate (4), a guide rod (5), a support frame (6), a return spring (7), and a locking block (8). The upper mounting plate (3) is fixed to the outer periphery of the lower end of the ventilation duct (1), and the lower mounting plate (4) is fixed to the outer periphery of the air outlet (2). The air outlet (2) is detachably installed at the lower end of the ventilation duct (1) through the cooperation of the lower mounting plate (4) and the upper mounting plate (3). The top of the lower mounting plate (4) is... Guide rods (5) are vertically fixed at all four corners. A through groove is provided at the corresponding position on the upper mounting plate (3). The guide rods (5) and the through groove form a clearance fit and slide into each other. Support frames (6) are symmetrically connected to the front and rear sides of the lower mounting plate (4). A locking block (8) is slidably connected on the support frame (6). Two return springs (7) are connected between the locking block (8) and the support frame (6). The top surface of the locking block (8) is machined with an outward inclined surface. A notch is provided on the upper mounting plate (3) at the position corresponding to the locking block (8).

2. A ventilation duct outlet fixing plate according to claim 1, characterized in that: An annular sealing ring is provided between the upper mounting plate (3) and the lower mounting plate (4), and the sealing ring is made of silicone rubber.

3. A ventilation duct outlet fixing plate according to claim 2, characterized in that: The angle α between the inclined surface and the vertical surface of the card block (8) is 30° to 60°, and the surface of the card block (8) is plated with hard chrome.

4. A ventilation duct outlet fixing plate according to claim 3, characterized in that: It also includes an adjusting screw (9) and a push plate (10). The adjusting screw (9) is rotatably connected to the center of the front and rear sides of the top of the upper mounting plate (3). The push plate (10) is threadedly connected to the adjusting screw (9). The bottom surface of the push plate (10) slides against the top surface of the upper mounting plate (3) to form a guide limit. The end of the push plate (10) forms a contactable engagement relationship with the locking block (8).

5. A ventilation duct outlet fixing plate according to claim 4, characterized in that: It also includes a fixed block (11) and a rotating block (13). Fixed blocks (11) are symmetrically installed on the front and rear sides of the top of the upper mounting plate (3). The upper part of the fixed block (11) is rotatably connected to the rotating block (13). In the initial state, the rotating block (13) is arranged horizontally, and its free end forms a rigid contact with the inner side of the corresponding side block (8).

6. A ventilation duct outlet fixing plate according to claim 5, characterized in that: It also includes a torsion spring (12) and a locking screw (14). The torsion spring (12) is sleeved on the outside of the pin shaft, and its two ends are fixed to the fixed block (11) and the rotating block (13) respectively. In the initial state, the torsion spring (12) is in a torsional deformation state. The locking screw (14) is connected to the middle of the rotating block (13) in a vertical through thread. The upper mounting plate (3) and the lower mounting plate (4) have through threaded holes at the axial position of the locking screw (14). The locking screw (14) and the threaded hole form a threaded connection.

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