Assembled smoke prevention and exhaust air duct

Abstract

This utility model discloses a prefabricated smoke exhaust duct, including a slide rail. A bidirectional screw is rotatably connected to the inner center of the slide rail. Threaded blocks are threaded to the upper and lower sides of the outer periphery of the bidirectional screw. Connecting rods are fixedly connected to the middle of the left and right side walls of the threaded blocks. The connecting rods are slidably connected to the upper and lower parts of the inner side of the connecting groove. When connecting this prefabricated smoke exhaust duct, the duct body is inserted into the upper and lower slots of the connecting pipe. During insertion, the rotating block passes through the opening and is rotated to align with the placement groove. Then, a knob is rotated, causing the bidirectional screw to rotate. This rotation brings the threaded blocks closer together, and the movement of the threaded blocks moves the connecting rods, causing the upper and lower rotating blocks to move closer together. The movement of the rotating blocks pushes the two sets of duct bodies towards one side of the connecting pipe, completing the duct body assembly operation and reducing the difficulty of duct body installation.

Description

Technical Field

[0001] This utility model relates to the field of smoke exhaust duct technology, specifically a prefabricated smoke exhaust duct. Background Technology

[0002] Smoke control and exhaust systems consist of supply and exhaust ducts, shafts, fire dampers, door opening and closing devices, supply and exhaust fans, and other equipment. Smoke control systems are set up in the form of positive pressure in stairwells. The smoke exhaust volume of mechanical smoke exhaust systems is directly related to the smoke control zones. Smoke control facilities in high-rise buildings should be divided into mechanical pressurized air supply smoke control facilities and natural smoke exhaust facilities with operable windows. Smoke exhaust ducts are one type of smoke control system and are a major component of smoke control and exhaust systems.

[0003] Existing smoke exhaust ducts are typically large in size, increasing the difficulty of transportation. Therefore, they need to be prefabricated and then transported to the construction site for assembly. However, current smoke exhaust ducts are usually connected and fixed with bolts, which requires additional reserved holes at the connection points. If the position of the reserved holes at the connection points is incorrect, the smoke exhaust duct cannot be installed normally, which increases the difficulty of installing and using the smoke exhaust duct. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a prefabricated smoke exhaust duct, including a connecting pipe, and a quick assembly mechanism is provided on the front side of the connecting pipe;

[0006] The rapid assembly mechanism includes a slide rail, with a bidirectional screw rotatably connected to the inner center of the slide rail. Threaded blocks are threaded to both the upper and lower outer sides of the bidirectional screw. Connecting rods are fixedly connected to the middle of the left and right side walls of each threaded block. Each connecting rod is slidably connected to the upper and lower parts of the inner side of a connecting groove. The connecting groove is located in the middle of the left and right side walls of the slide rail. A rotating block is rotatably connected to the end of each connecting rod away from the connecting pipe. The threaded blocks are slidably connected to the upper and lower parts of the inner side of the slide rail.

[0007] As a preferred embodiment of this utility model, the slide rail is fixedly connected to the middle of the front wall of the outer side of the connecting pipe, and the connecting rods are all fitted with the connecting groove with clearance.

[0008] As a preferred embodiment of this utility model, a knob is rotatably connected to the middle of the outer top wall of the slide rail, and the knob is fixedly connected to the bidirectional screw.

[0009] As a preferred embodiment of this utility model, slots are provided in the middle of the upper and lower walls of the connecting pipe, and sealing rings are fixedly connected to the inner side of each slot.

[0010] As a preferred embodiment of this utility model, both the upper and lower parts of the connecting pipe are provided with duct bodies, and the duct bodies are fitted with slots with clearance.

[0011] As a preferred embodiment of this utility model, a connecting plate is fixedly connected to the middle of the left and right walls on the outer side of the duct body, and an opening is provided in the middle of each connecting plate.

[0012] As a preferred embodiment of this utility model, each of the connecting plates has a placement groove in the middle of the side wall away from the connecting pipe, and the placement groove is in clearance fit with the rotating block.

[0013] In a preferred embodiment of this utility model, the openings are all on the same vertical horizontal line as the rotating blocks, and the rotating blocks are all fitted with the openings with a gap.

[0014] The beneficial effects of this utility model are:

[0015] 1. This type of prefabricated smoke exhaust duct, when it is necessary to connect the smoke exhaust duct, inserts two sets of duct bodies into the slots on the upper and lower sides of the connecting pipe respectively. During the insertion of the duct body, the rotating block passes through the opening and is rotated to make the rotating block coincide with the placement slot. Then, the knob is turned. During the rotation of the knob, the double screw rotates. During the rotation of the double screw, the threaded blocks on both sides move closer to each other. During the movement of the threaded blocks, the connecting rod moves, thereby bringing the upper and lower rotating blocks closer to each other. During the movement of the rotating blocks, the two sets of duct bodies are pushed to one side of the connecting pipe, completing the assembly operation of the duct body and reducing the installation difficulty of the duct body;

[0016] 2. This type of prefabricated smoke exhaust duct, during the movement of the duct body inside the slot, the side wall of the duct body squeezes the sealing ring, causing the sealing ring to deform inside the slot. During the deformation process, the sealing ring fills the gap between the duct body and the slot, thereby improving the sealing performance between the smoke exhaust ducts. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a side view of the overall structure of a prefabricated smoke exhaust duct according to this utility model;

[0019] Figure 2 This is a front view schematic diagram of the overall structure of a prefabricated smoke exhaust duct of this utility model;

[0020] Figure 3 This is a side view schematic diagram of the connection structure of a prefabricated smoke exhaust duct according to this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of a prefabricated smoke exhaust duct according to this utility model;

[0022] Figure 5 This is a top view schematic diagram of the connection structure of a prefabricated smoke exhaust duct according to this utility model.

[0023] In the diagram: 1. Connecting pipe; 2. Quick assembly mechanism; 3. Slide rail; 4. Two-way screw; 5. Threaded block; 6. Connecting groove; 7. Knob; 8. Connecting rod; 9. Rotating block; 10. Slot; 11. Sealing ring; 12. Air duct body; 13. Connecting plate; 14. Opening; 15. Placement slot. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] Example: Figures 1-5 As shown, this utility model provides a prefabricated smoke exhaust duct, including a connecting pipe 1, and a quick assembly mechanism 2 is provided on the front side of the connecting pipe 1.

[0026] The quick assembly mechanism 2 includes a slide rail 3. A bidirectional screw 4 is rotatably connected to the middle of the inner side of the slide rail 3. The slide rail 3 provides space for the installation of the bidirectional screw 4 and the threaded block 5. Threaded blocks 5 are threadedly connected to the upper and lower sides of the outer periphery of the bidirectional screw 4. Connecting rods 8 are fixedly connected to the middle of the left and right side walls of the threaded block 5. The connecting rods 8 are slidably connected to the upper and lower parts of the inner side of the connecting groove 6. The connecting groove 6 is respectively set in the middle of the left and right side walls of the slide rail 3. During the movement of the threaded block 5, it can drive the connecting rod 8 and the rotating block 9 to rotate. The end of the connecting rod 8 away from the connecting pipe 1 is rotatably connected to the rotating block 9. The threaded blocks 5 are slidably connected to the upper and lower parts of the inner side of the slide rail 3.

[0027] The slide rail 3 is fixedly connected to the middle of the front wall of the outer side of the connecting pipe 1. The connecting rods 8 are all clearance-fitted with the connecting grooves 6. A knob 7 is rotatably connected to the middle of the top wall of the outer side of the slide rail 3. The knob 7 is fixedly connected to the bidirectional screw 4. Rotating the knob 7 can make the bidirectional screw 4 rotate, thereby moving the threaded block 5.

[0028] The upper and lower walls of the connecting pipe 1 are provided with slots 10 in the middle. A sealing ring 11 is fixedly connected to the inside of each slot 10. The upper and lower parts of the connecting pipe 1 are provided with duct bodies 12. The duct bodies 12 are fitted with slots 10 with clearance. The duct bodies 12 can be inserted into the slots 10 to complete the connection operation of the two sets of duct bodies 12.

[0029] A connecting plate 13 is fixedly connected to the middle of the left and right walls on the outer side of the duct body 12. An opening 14 is provided in the middle of the connecting plate 13. A placement groove 15 is provided in the middle of the side wall of the connecting plate 13 away from the connecting pipe 1. The placement groove 15 is in clearance fit with the rotating block 9. The opening 14 is on the same vertical horizontal line as the rotating block 9. The rotating block 9 is in clearance fit with the opening 14. After the rotating block 9 passes through the inside of the opening 14, rotating the rotating block 9 can make the rotating block 9 coincide with the placement groove 15.

[0030] Working principle: When connecting the smoke exhaust ducts, two sets of duct bodies 12 are inserted into the upper and lower slots 10 of the connecting pipe 1, respectively. During the insertion of the duct body 12, the rotating block 9 passes through the opening 14 and is rotated to make the rotating block 9 coincide with the placement slot 15. Then, the knob 7 is rotated. During the rotation of the knob 7, the bidirectional screw 4 is rotated. During the rotation of the bidirectional screw 4, the threaded blocks 5 on both sides move closer to each other. During the movement of the threaded blocks 5, the connecting rod 8 is moved, thereby making the upper and lower rotating blocks 9 move closer to each other. During the movement of the rotating blocks 9, the two sets of duct bodies 12 are pushed to one side of the connecting pipe 1, completing the assembly operation of the duct body 12. During the movement of the duct body 12 inside the slot 10, the side wall of the duct body 12 squeezes the sealing ring 11, causing the sealing ring 11 to deform inside the slot 10. During the deformation of the sealing ring 11, the gap between the duct body 12 and the slot 10 is filled, improving the sealing performance between the smoke exhaust ducts.

[0031] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," 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.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A prefabricated smoke exhaust duct, comprising a connecting pipe (1), characterized in that: A quick assembly mechanism (2) is provided on the front side of the connecting pipe (1); The rapid assembly mechanism (2) includes a slide rail (3), a bidirectional screw (4) is rotatably connected to the middle of the inner side of the slide rail (3), threaded blocks (5) are threadedly connected to the upper and lower sides of the outer periphery of the bidirectional screw (4), and connecting rods (8) are fixedly connected to the middle of the left and right side walls of the threaded blocks (5). The connecting rods (8) are slidably connected to the upper and lower parts of the inner side of the connecting groove (6). The connecting groove (6) is respectively set in the middle of the left and right side walls of the slide rail (3). A rotating block (9) is rotatably connected to the end of the connecting rod (8) away from the connecting pipe (1). The threaded blocks (5) are slidably connected to the upper and lower parts of the inner side of the slide rail (3).

2. The prefabricated smoke exhaust duct according to claim 1, characterized in that, The slide rail (3) is fixedly connected to the middle of the front wall of the outer side of the connecting pipe (1), and the connecting rods (8) are all in clearance fit with the connecting groove (6).

3. The prefabricated smoke exhaust duct according to claim 1, characterized in that, A knob (7) is rotatably connected to the middle of the outer top wall of the slide rail (3), and the knob (7) is fixedly connected to the bidirectional screw (4).

4. The prefabricated smoke exhaust duct according to claim 1, characterized in that, The connecting pipe (1) has slots (10) in the middle of the upper and lower walls, and sealing rings (11) are fixedly connected to the inner side of each slot (10).

5. A prefabricated smoke exhaust duct according to claim 1, characterized in that, The connecting pipe (1) is provided with a duct body (12) at both the top and bottom, and the duct body (12) is fitted with the slot (10) with a clearance.

6. A prefabricated smoke exhaust duct according to claim 5, characterized in that, The main body of the air duct (12) has a connecting plate (13) fixedly connected to the middle of the left and right walls on the outside, and the connecting plate (13) has an opening (14) in the middle.

7. A prefabricated smoke exhaust duct according to claim 6, characterized in that, Each of the connecting plates (13) has a placement groove (15) in the middle of the side wall away from the connecting pipe (1), and the placement groove (15) is in clearance fit with the rotating block (9).

8. A prefabricated smoke exhaust duct according to claim 6, characterized in that, The openings (14) are all on the same vertical horizontal line as the rotating blocks (9), and the rotating blocks (9) are all in clearance fit with the openings (14).

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