Large-diameter smoke exhaust fire-preventing check valve
Patent Information
- Application Number
- CN202522185689.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-16
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-10-16
AI Technical Summary
但是现有技术中对于风管和阀体进风口的连接处除了密封固定以外，不设其他的支撑结构，而风管通常会预留移动的长度，使其不会过度绷直，从而便于适应温度带来的形变，并且多数风管的安装不会过度进行固定，因此风管靠近与阀体的连接处会处于一种垂搭的状态
本实用新型通过设置支撑条，支撑条可以托住风管靠近阀体的一侧，并且位置可以根据收放连接线的长度来进行调节，以在风管的垂搭处，对其从底部进行承托，以对其实现支撑，减少垂搭的重量对于风管和阀体连接处的负面影响，并且在风管出现晃动等位移时，也不会对连接处直接造成拖拽，从而保证阀体与风管连接处的牢固性和密封效果。另外在将阀体与风管进行连接固定时，也可通过支撑条来拖住风管的端头，以此来便于安装人员进行连接对准，无需人工长时间对风管进行托举，从而方便拆装工作的进行。
Smart Images
Figure CN224730167U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of smoke exhaust, fire prevention, and backflow prevention valves, specifically a large-diameter smoke exhaust, fire prevention, and backflow prevention valve. Background Technology
[0002] Smoke exhaust fireproof backflow preventer valves are common valves used for connecting smoke ducts, primarily for connecting smoke ducts to exhaust vents. One end of the valve needs to be inserted into the vent for fixed installation, while the other end needs to be connected to a flexible duct to connect to the exhaust fan or range hood outlet. However, in existing technology, the connection between the duct and the valve body inlet lacks any supporting structure other than sealing and fixing. The duct usually has a reserved length for movement to prevent excessive straightening and to accommodate temperature-induced deformation. Furthermore, most duct installations are not overly fixed, resulting in the duct dangling near the valve body connection. This causes part of the duct's weight to act on the connection, and the duct may sway or even swing during use due to changes in air pressure. Both swaying and swinging exert drag on the connection between the duct and the valve body, which over time can affect the connection's strength and sealing effect, leading to smoke leakage. Utility Model Content
[0003] (a) Technical problems to be solved In view of the above-mentioned shortcomings of the existing technology, the present invention provides a large-diameter smoke exhaust fire prevention check valve, which can effectively solve the problems of the existing technology.
[0004] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: This utility model discloses a large-diameter smoke exhaust fireproof check valve, including a valve body and a fixed seat fixedly installed on the upper end of the valve body. A guide frame is fixedly installed at the end of the fixed seat. A locking component for fixing the position of the guide frame is provided on the guide frame. A positioning shaft is rotatably installed inside the fixed seat. A one-way locking component for locking the positioning shaft is provided on the upper side of the positioning shaft. A wire roller is fixedly installed on the lower side of the positioning shaft. A connecting wire is wound on the wire roller. Two sets of take-up wires are fixedly connected to the end of the connecting wires. A connecting ring is fixedly connected to the end of each of the two sets of take-up wires. A positioning ring is sleeved on each of the two sets of connecting rings. The positioning ring is fixedly installed at the end of a support bar. Limiting components for the two sets of take-up wires to converge are provided on the two sets of take-up wires.
[0005] Furthermore, the locking assembly includes two sets of rods symmetrically and longitudinally inserted into the guide frame. The upper ends of the two sets of rods are fixedly connected to a lever. The upper surface of the valve body has slots symmetrically opened on both sides of the fixed seat, corresponding to the rods. The two sets of rods are fixedly connected to a base at the lower side of the guide frame, and a guide post is movably inserted into the base. The upper end of the guide post is fixedly connected to the guide frame. A first spring is movably sleeved on the guide post, and the upper and lower ends of the first spring abut against the guide frame and the base, respectively.
[0006] Furthermore, the one-way locking assembly includes a knob fixedly mounted on the upper end of the positioning shaft, a one-way ratchet fixedly sleeved on the upper side of the positioning shaft, a pull rod laterally movably inserted on the fixed seat, and a one-way ratchet block fixedly connected to the inner end of the pull rod, the one-way ratchet block sliding within the fixed seat, the teeth of the one-way ratchet block meshing with the teeth of the one-way ratchet wheel, a second spring sleeved on the inner side of the pull rod, and the two ends of the second spring abutting against the inner wall of the fixed seat and the one-way ratchet block respectively.
[0007] Furthermore, the guide frame has a transverse guide groove, and guide wheels are symmetrically and rotatably installed at the outer end opening of the guide groove. The connecting line passes through the guide groove in the fixed seat and exits between the two sets of guide wheels.
[0008] Furthermore, the support strip is composed of two sets of rubber strips, with a clear gap in the middle. The two ends of the support strip are semi-circular, and the two sets of positioning rings are symmetrically arranged at the semi-circular ends of the support strip.
[0009] Furthermore, the limiting component includes a movable block with symmetrical wire holes at both ends. Two sets of take-up wires are respectively passed through the two sets of wire holes. The inner walls of both sets of wire holes are provided with movable grooves, and a third spring is transversely arranged in the movable groove. A movable rod is movably installed at the opening of the movable groove, and a clamp is fixedly connected to the outer end of the movable rod. A slider is slidably arranged on the surface of the movable block, and the inner end of the slider is fixedly connected to the movable rod. The two ends of the third spring abut against the inner wall of the movable groove and the inner end of the movable rod, respectively.
[0010] (III) Beneficial Effects Compared with the known prior art, the technical solution provided by this utility model has the following beneficial effects: This invention incorporates a support bar that supports the side of the duct closest to the valve body. The support bar's position can be adjusted according to the length of the connecting cable, providing bottom support at the duct's drooping point. This reduces the negative impact of the drooping weight on the connection between the duct and valve body. Furthermore, it prevents dragging at the connection point when the duct shifts or sways, ensuring the stability and sealing of the valve body-duct connection. Additionally, when connecting and fixing the valve body to the duct, the support bar can support the duct end, facilitating alignment by installers and eliminating the need for prolonged manual support of the duct, thus simplifying assembly and disassembly. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a schematic diagram of the usage state of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic cross-sectional view of the fixed base in this utility model; Figure 4 This is a schematic cross-sectional view of the structure inside the fixing base in this utility model; Figure 5 This is a cross-sectional view of the locking component in this utility model; Figure 6 This is a schematic cross-sectional view of the one-way locking component in this utility model; Figure 7 This is a cross-sectional view of the limiting component in this utility model.
[0013] The labels in the diagram represent: 1. Valve body; 2. Fixed seat; 3. Guide frame; 4. Insert rod; 5. Toggle block; 6. Slot; 7. Base; 8. Guide post; 9. First spring; 10. Positioning shaft; 11. Knob; 12. One-way ratchet; 13. Pull rod; 14. One-way ratchet block; 15. Second spring; 16. Wire roller; 17. Guide groove; 18. Guide wheel; 19. Connecting wire; 20. Take-up wire; 21. Connecting ring; 22. Positioning ring; 23. Support bar; 24. Movable block; 25. Wire hole; 26. Movable groove; 27. Third spring; 28. Movable rod; 29. Clamping plate; 30. Slider. Detailed Implementation
[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0015] Please see Figure 1-7 An embodiment of this utility model provides a large-diameter smoke exhaust fireproof check valve, including a valve body 1 and a fixed seat 2 fixedly installed on the upper end of the valve body 1. A guide frame 3 is fixedly installed at the end of the fixed seat 2. A locking component for fixing the position of the guide frame 3 is provided on the guide frame 3. A positioning shaft 10 is rotatably installed inside the fixed seat 2. A one-way locking component for locking the positioning shaft 10 is provided on the upper side of the positioning shaft 10. A wire roller 16 is fixedly installed on the lower side of the positioning shaft 10. A connecting wire 19 is wound on the wire roller 16. Two sets of take-up wires 20 are fixedly connected to the end of the connecting wire 19. A connecting ring 21 is fixedly connected to the end of each of the two sets of take-up wires 20. A positioning ring 22 is sleeved on each of the two sets of connecting rings 21. The positioning ring 22 is fixedly installed at the end of the support bar 23. A limiting component for the two sets of take-up wires 20 to be gathered is provided on the two sets of take-up wires 20. One end of the connecting line 19 is fixedly connected to the winding roller 16, and the winding direction is such that the winding roller 16 rotates counterclockwise to wind up the connecting line 19, and the winding roller 16 rotates clockwise to loosen the connecting line 19.
[0016] As a preferred embodiment of this example, Figure 2 , Figure 3 and Figure 5 As shown, the locking assembly includes two sets of insert rods 4 symmetrically and longitudinally inserted into the guide frame 3. A lever 5 is fixedly connected to the upper end of each set of insert rods 4. Slots 6 corresponding to the insert rods 4 are symmetrically opened on both sides of the fixed seat 2 on the upper surface of the valve body 1. A base 7 is fixedly connected to the lower side of the guide frame 3 for each set of insert rods 4. A guide post 8 is movably inserted into the base 7. The upper end of the guide post 8 is fixedly connected to the guide frame 3. A first spring 9 is movably sleeved on the guide post 8, and the upper and lower ends of the first spring 9 abut against the guide frame 3 and the base 7, respectively. This structure is used to lock the position of the guide frame 3 inside or outside the fixed seat 2, allowing selective use of the support bar 23 during actual use. When not in use, the guide frame 3 can be moved inward to avoid excessive protrusion that could lead to difficulty in packaging or damage from impacts.
[0017] As a preferred embodiment of this example, Figure 3 , Figure 4 and Figure 6As shown, the one-way locking assembly includes a knob 11 fixedly mounted on the upper end of the positioning shaft 10, a one-way ratchet 12 fixedly sleeved on the upper side of the positioning shaft 10, a pull rod 13 laterally movably inserted on the fixed seat 2, and a one-way ratchet block 14 fixedly connected to the inner end of the pull rod 13. The one-way ratchet block 14 slides in the fixed seat 2, and the teeth of the one-way ratchet block 14 mesh with the teeth of the one-way ratchet 12. A second spring 15 is sleeved on the inner side of the pull rod 13, and the two ends of the second spring 15 abut against the inner wall of the fixed seat 2 and the one-way ratchet block 14, respectively. The teeth of both the one-way ratchet 12 and the one-way ratchet block 14 are one-way teeth, that is, the clockwise direction is a flat surface and the counterclockwise direction is an inclined surface. This makes it so that when the one-way ratchet 12 is engaged, the one-way ratchet 12 cannot rotate clockwise, but when it rotates counterclockwise, the one-way ratchet 12 will push the one-way ratchet block 14 away through the opposing inclined surfaces of the teeth, thereby achieving counterclockwise rotation.
[0018] As a preferred embodiment of this example, Figure 3 , Figure 4 and Figure 6 As shown, a guide groove 17 is laterally opened inside the guide frame 3, and guide wheels 18 are symmetrically and rotatably mounted at the outer opening of the guide groove 17. The connecting wire 19 passes through the guide groove 17 in the fixed base 2 and exits between the two sets of guide wheels 18. The surface of the guide wheels 18 is concave, and the two sets of guide wheels 18 are in contact with each other. The connecting wire 19 exits through the grooves on the surfaces of the two sets of guide wheels 18. This structure is used to guide and limit the connecting wire 19, so that the connecting wire 19 can move up and down and bend easily, reducing the friction force when changing direction after passing through.
[0019] As a preferred embodiment of this example, Figure 1 and Figure 2 As shown, the support strip 23 is composed of two sets of rubber strips with a noticeable gap in the middle. Both ends of the support strip 23 are semi-circular, and two sets of positioning rings 22 are symmetrically positioned at the semi-circular ends of the support strip 23. This structure gives the support strip 23 a certain degree of elasticity, thus buffering the vibration and displacement of the duct. Furthermore, the support strip 23 can adjust its support position by opening and closing the two sets of rubber strips, enhancing the support effect and ensuring the stability and effectiveness of the support for the duct.
[0020] As a preferred embodiment of this example, Figure 2 and Figure 7As shown, the limiting component includes a movable block 24. Two wire holes 25 are symmetrically opened at both ends of the movable block 24. Two sets of take-up wires 20 are respectively passed through the two sets of wire holes 25. Movable grooves 26 are opened on the inner walls of both sets of wire holes 25, and a third spring 27 is horizontally arranged within each movable groove 26. A movable rod 28 is movably installed at the opening of the movable groove 26, and a clamping plate 29 is fixedly connected to the outer end of the movable rod 28. A slider 30 is slidably arranged on the surface of the movable block 24, and the inner end of the slider 30 is fixedly connected to the movable rod 28. The two ends of the third spring 27 abut against the inner wall of the movable groove 26 and the inner end of the movable rod 28, respectively. This structure allows the take-up wires 20 on the upper side of the duct to work with the support bar 23 to achieve a binding-like effect, increasing the positioning effect and preventing unnecessary displacement of the support bar 23 due to duct vibration or other factors during daily use. It also allows it to adapt to ducts of different sizes to achieve a binding and positioning effect.
[0021] Working principle: When in use, if it is necessary to lift the air duct, simply pull the lever 5 upwards, so that the lever 5 drives the two sets of insert rods 4 to lift up and leave the slot 6. The base 7 will be driven upwards and squeeze the first spring 9. Then rotate the fixed seat 2 180 degrees, so that the guide 3 moves to the opening of the valve body 1. Then align the insert rod 4 with the slot 6 on that side, release the lever 5, so that the first spring 9 pushes the base 7 downwards to reset through the spring force, so that the insert rod 4 can be inserted into the slot 6 to lock the angle of the fixed seat 2 and the guide 3.
[0022] Next, the support bar 23 can be fitted onto the lower side of the duct. If it is necessary to adjust the length of the connecting line 19 so that the support bar 23 can be moved to a further position, the pull rod 13 can be pulled, causing the pull rod 13 to drive the one-way ratchet block 14 away from the one-way ratchet wheel 12 and disengage it. During this process, the second spring 15 will be compressed. Then, the connecting line 19 can be pulled out, allowing the connecting line 19 to drive the positioning shaft 10 to rotate clockwise via the roller 16. After pulling it out to approximately the desired length, the pull rod 13 can be released, allowing the compressed second spring 15 to push the one-way ratchet block 14 back to its original position through its restoring force, causing it to engage with the one-way ratchet wheel 12 and lock the one-way ratchet wheel 12. This prevents the positioning shaft 10 from continuing to rotate clockwise, and at this point, the connecting line 19 cannot be pulled out further. The knob 11 can be rotated counterclockwise to drive the positioning shaft 10 to rotate counterclockwise. When the one-way ratchet 12 rotates counterclockwise, the inclined surface of its teeth will abut against the inclined surface of the one-way ratchet block 14, and the ratchet block 14 will be pushed open by the pressure, thus achieving counterclockwise rotation. When the wire roller 16 rotates counterclockwise, it will wind up the connecting wire 19, thereby reducing the length of the connecting wire 19. After the length of the connecting wire 19 is adjusted, the support bar 23 is adjusted to a suitable support position on the air duct. Then, the two sets of sliders 30 on the movable block 24 are pinched, so that the sliders 30 drive the movable rod 28 into the movable groove 26 and squeeze the third spring 27. The clamp 29 will leave the surface of the winding wire 20. At this time, the movable block 24 can be dragged downwards to tighten the two sets of winding wires 20. Figure 1 and Figure 2 As shown, the slider 30 can then be released, and the third spring 27 can drive the movable rod 28 to reset through the restoring force, so that the clamping plate 29 can squeeze the take-up line 20 in the wire hole 25 to achieve the positioning of the movable block 24 and ensure that the take-up position of the take-up line 20 is not easily changed.
[0023] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
[0024] In the description of this application, it should be understood that the terms "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A large-diameter smoke exhaust fireproof check valve, characterized in that: The device includes a valve body (1) and a fixed seat (2) fixedly mounted on the upper end of the valve body (1). A guide frame (3) is fixedly provided at the end of the fixed seat (2). A locking component for fixing the position of the guide frame (3) is provided on the guide frame (3). A positioning shaft (10) is rotatably mounted inside the fixed seat (2). A one-way locking component for locking the positioning shaft (10) is provided on the upper side of the positioning shaft (10). A wire roller (16) is fixedly provided on the lower side of the positioning shaft (10). The roller (16) is wound with a connecting line (19), and the ends of the connecting line (19) are fixedly connected to two sets of take-up lines (20). The ends of the two sets of take-up lines (20) are fixedly connected to a connecting ring (21), and the two sets of connecting rings (21) are respectively fitted with positioning rings (22). The positioning rings (22) are fixedly installed at the ends of the support bar (23). The two sets of take-up lines (20) are provided with limiting components for the two sets of take-up lines (20) to be gathered together.
2. The large-diameter smoke exhaust fireproof check valve according to claim 1, characterized in that: The locking assembly includes two sets of insert rods (4) that are symmetrically and longitudinally inserted into the guide frame (3). The upper ends of the two sets of insert rods (4) are fixedly connected to a lever (5). The upper surface of the valve body (1) is symmetrically provided with slots (6) corresponding to the insert rods (4) on both sides of the fixed seat (2). The two sets of insert rods (4) are fixedly connected to a base (7) at the lower side of the guide frame (3). A guide post (8) is movably inserted into the base (7). The upper end of the guide post (8) is fixedly connected to the guide frame (3). A first spring (9) is movably sleeved on the guide post (8). The upper and lower ends of the first spring (9) abut against the guide frame (3) and the base (7) respectively.
3. The large-diameter smoke exhaust fireproof check valve according to claim 1, characterized in that: The one-way locking assembly includes a knob (11) fixedly mounted on the upper end of the positioning shaft (10). A one-way ratchet (12) is fixedly sleeved on the upper side of the positioning shaft (10). A pull rod (13) is laterally inserted into the fixed seat (2), and a one-way ratchet block (14) is fixedly connected to the inner end of the pull rod (13). The one-way ratchet block (14) slides in the fixed seat (2). The teeth of the one-way ratchet block (14) mesh with the teeth of the one-way ratchet (12). A second spring (15) is sleeved on the inner side of the pull rod (13), and the two ends of the second spring (15) abut against the inner wall of the fixed seat (2) and the one-way ratchet block (14) respectively.
4. A large-diameter smoke exhaust fireproof check valve according to claim 1, characterized in that: The guide frame (3) has a horizontally opened guide groove (17), and guide wheels (18) are symmetrically rotated at the outer end opening of the guide groove (17). The connecting line (19) passes through the guide groove (17) in the fixed seat (2) and passes out between the two sets of guide wheels (18).
5. A large-diameter smoke exhaust fireproof check valve according to claim 1, characterized in that: The support strip (23) is composed of two sets of rubber strips, and there is a clear gap in the middle of the support strip (23). The two ends of the support strip (23) are set in a semi-circular shape, and the two sets of positioning rings (22) are symmetrically arranged at the semi-circular positions at both ends of the support strip (23).
6. A large-diameter smoke exhaust fireproof check valve according to claim 1, characterized in that: The limiting component includes a movable block (24), with wire holes (25) symmetrically opened at both ends of the movable block (24). Two sets of gathering wires (20) are respectively inserted into the two sets of wire holes (25). Movable grooves (26) are opened on the inner walls of the two sets of wire holes (25), and a third spring (27) is arranged horizontally in the movable groove (26). A movable rod (28) is movably installed at the opening of the movable groove (26), and a clamp (29) is fixedly connected to the outer end of the movable rod (28). A slider (30) is slidably arranged on the surface of the movable block (24), and the inner end of the slider (30) is fixedly connected to the movable rod (28). The two ends of the third spring (27) abut against the inner wall of the movable groove (26) and the inner end of the movable rod (28), respectively.