Check valve for discharging smoke

Abstract

The utility model belongs to the technical field of smoke exhaust check valves, and discloses a smoke exhaust check valve which comprises a middle plate, a butt joint pipe is fixedly arranged on one side of the middle plate, and a pipeline installation assembly is arranged on the other side of the butt joint pipe. The pipeline mounting assembly comprises a mounting base fixed to the butt joint pipe, a binding belt is fixedly arranged on the outer side of the mounting base, a smoke pipe mounting ring is inserted into the mounting base, an annular groove is formed in the outer side of the smoke pipe mounting ring, a deformation belt is arranged in the annular groove of the smoke pipe mounting ring in a pressed mode, and the deformation belt is fixedly connected with the butt joint pipe. By means of the structural design of the binding belt and the deformation belt on the outer side of the pipeline installation assembly, the flexible smoke pipe can be placed inside and outside the pipeline installation assembly, the smoke pipe can be tightly pressed outside the butt-joint pipe by being matched with a flexible positioning structure such as the structural design of the binding belt and the deformation belt, rapid positioning is carried out, and meanwhile the smoke pipe can be placed in the butt-joint pipe. The situation that the smoke pipe is pressed can be avoided, the positioning and sealing effects on the smoke pipe are better, and leakage is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of smoke exhaust check valves, specifically a smoke exhaust check valve. Background Technology

[0002] Smoke exhaust check valves are valves that automatically open and close based on the force generated by the flow of the medium in the pipeline. They are a type of automatic valve. Check valves are used in pipeline systems, and their main function is to prevent backflow of the medium. They are suitable for pipelines containing various media. When a smoke exhaust check valve is installed on a pipeline, it becomes one of the fluid components of this complete pipeline. Smoke exhaust check valves, also known as interior wall vent caps, are also environmentally friendly products promoted by the Ministry of Construction. They can prevent backflow of fumes and also serve as a connection function for pipelines.

[0003] Meanwhile, a smoke exhaust fireproof backflow check valve with announcement number CN221003983U is disclosed, including a smoke exhaust pipe and a check valve body. A first mounting component is installed on the smoke exhaust pipe, and a second mounting component is installed on the check valve body. The second mounting component is installed on the first mounting component.

[0004] When using the aforementioned smoke exhaust fireproof check valve, the smoke pipe still needs to be installed on the outside of the sealing ring before being positioned using the installation components. Since the smoke pipe has a relatively flexible structure, using a rigid installation structure for fixing during installation can easily lead to sealing leaks, resulting in smoke leakage. Furthermore, it can put strong pressure on the smoke pipe, potentially causing it to break and leak.

[0005] Therefore, a check valve for smoke exhaust is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a check valve for smoke exhaust, which has a double-layer quick-installation flexible positioning structure, allowing the smoke pipe to be quickly and more closely positioned and installed on the outside of the connecting pipe, thus avoiding leakage.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a check valve for smoke exhaust, comprising an intermediate plate, wherein a connecting pipe is fixedly provided on one side of the intermediate plate, and a pipe installation assembly is provided on the other side of the connecting pipe;

[0008] The pipe installation assembly includes a mounting base fixed to the connecting pipe. A gathering strap is fixedly provided on the outer side of the mounting base. A flue pipe mounting ring is inserted into the inside of the mounting base. An annular groove is opened on the outer side of the flue pipe mounting ring. A deformation band is pressed tightly inside the annular groove of the flue pipe mounting ring.

[0009] Preferably, the inner wall of the gathering band is provided with an elastic band, and the elastic band is an elastic nylon band with an anti-slip toothed groove structure on its surface.

[0010] Preferably, the surface of the gathering strap is provided with a positioning hole, and a fastening screw that is spirally arranged with the mounting base passes through the interior of the positioning hole. An insertion hole is provided at the center of the bottom end of the mounting base, and the fastening screw is located inside the insertion hole.

[0011] Preferably, clamping grooves are provided on both sides of the mounting base, and the elastic band is located inside the clamping grooves.

[0012] Preferably, the outer side of the flue installation ring is provided with an annular groove, the deformation band is located inside the annular groove, and the deformation band is made of deformable steel strip.

[0013] Preferably, a limiting ring is fixedly provided at one end of the deformation belt, and a long screw fixed to the other end of the deformation belt is inserted into the inside of the limiting ring.

[0014] Preferably, the outer side of the long screw is helically provided with a fastening nut that fits against the limiting ring.

[0015] Preferably, the other side of the intermediate plate is connected to a connecting pipe, and the connecting pipe is designed with an angled opening.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model, through the design of the converging band and deformation band on the outside of the pipe installation component, allows the flexible flue pipe to be inserted into the inside and outside of the pipe installation component. Matching the flexible positioning structure, such as the converging band and deformation band design, can press the flue pipe tightly against the outside of the connecting pipe, achieving rapid positioning while avoiding compression of the flue pipe. It also provides a better sealing effect for the flue pipe positioning, preventing leakage.

[0018] 2. This utility model, through the structural design of a long screw and a fastening nut, can quickly position the flue pipe placed outside the flue pipe mounting ring by tightening the fastening nut and pressing the limiting ring to the end of the long screw. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is an exploded view of the unfolded structure of the pipeline installation assembly of this utility model.

[0021] Figure 3 This is a schematic diagram of the installation structure of the flue pipe mounting ring of this utility model;

[0022] Figure 4This is a schematic diagram of the installation structure of the deformation belt of this utility model.

[0023] In the diagram: 1. Middle plate; 2. Exhaust pipe; 3. Connecting pipe;

[0024] 4. Pipe installation components; 41. Mounting base; 42. Contraction strap; 43. Elastic band; 44. Positioning hole; 45. Clamping groove; 46. Insertion hole; 47. Fastening screw;

[0025] 5. Smoke pipe mounting ring; 6. Deformation band; 7. Limiting ring; 8. Long screw; 9. Fastening nut. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] The following describes an embodiment of this utility model based on its overall structure.

[0028] like Figures 1 to 4 As shown, this utility model provides a check valve for smoke exhaust, including an intermediate plate 1. A connecting pipe 3 is fixedly provided on one side of the intermediate plate 1, and the mounting seat 41 in the pipe installation assembly 4 is fixed through the connecting pipe 3. The pipe installation assembly 4 is provided on the other side of the connecting pipe 3.

[0029] The pipe installation assembly 4 includes a mounting base 41 fixed to the connecting pipe 3. A gathering band 42 is fixedly provided on the outside of the mounting base 41. A flue pipe installation ring 5 is inserted into the inside of the mounting base 41. The flue pipe installation ring 5 is quickly installed into the inside of the mounting base 41 and connected to the flue pipe for sealing. An annular groove is opened on the outside of the flue pipe installation ring 5. A deformation band 6 is pressed inside the annular groove of the flue pipe installation ring 5. The deformation band 6 constricts and seals the flue pipe.

[0030] In this embodiment, the inner wall of the gathering strap 42 is provided with an elastic strap 43, and the elastic strap 43 is an elastic nylon strap with an anti-slip toothed groove structure on its surface. The deformation of the elastic strap 43 can clamp the smoke pipe mounting ring 5 located inside the mounting base 41, making positioning more convenient.

[0031] The surface of the gathering strap 42 is provided with a positioning hole 44, and a fastening screw 47 that is spirally arranged with the mounting base 41 passes through the interior of the positioning hole 44. An insertion hole 46 is provided at the center of the bottom end of the mounting base 41, and the fastening screw 47 is located inside the insertion hole 46. The fastening screw 47 is inserted into the insertion hole 46, and the gathering strap 42 passing through the positioning hole 44 is positioned. The clamping pipe mounting ring 5 is adjusted and tightened.

[0032] Both sides of the mounting base 41 are provided with clamping grooves 45, and the elastic band 43 is located inside the clamping grooves 45. The structure of the elastic band 43 is designed to be positioned by deforming and fitting the flue mounting ring 5.

[0033] The outer side of the flue pipe mounting ring 5 is provided with an annular groove, and the deformation band 6 is located inside the annular groove. The deformation band 6 is made of deformable steel strip. The structural design of the annular groove can better position and tighten the flue pipe.

[0034] A limiting ring 7 is fixedly provided at one end of the deformation belt 6. A long screw 8, which is fixed to the other end of the deformation belt 6, is inserted into the inside of the limiting ring 7. The long screw 8 passes through the limiting ring 7 for easy positioning.

[0035] The outer side of the long screw 8 is provided with a fastening nut 9 that fits against the limiting ring 7. By rotating the fastening nut 9, the limiting ring 7 on the outer side of the long screw 8 can be pressed and positioned.

[0036] The other side of the middle plate 1 is connected to a smoke exhaust pipe 2, and the smoke exhaust pipe 2 is designed with an angled opening. The angled opening structure allows for easy installation on the wall.

[0037] The working principle and process of a smoke exhaust check valve:

[0038] Before installing the flue gas check valve, prepare suitable flue pipes and related installation tools, such as screwdrivers. Confirm that the direction and position of the connection between the flue pipe 2 and the connecting pipe 3 meet the layout requirements of the flue gas system. Installation of the flue pipe mounting ring 5: Insert the flue pipe into the flue pipe mounting ring 5. The annular groove on the outside of the flue pipe mounting ring 5 is used to install the deformation band 6. Place the deformation band 6 into the annular groove of the flue pipe mounting ring 5. Insert the long screw 8 into the limiting ring 7, and then use a tool to rotate and tighten the fastening nut 9. Because the deformation band 6 is made of deformable steel strip, as the fastening nut 9 is tightened, the long screw 8 will pull the deformation band 6 to contract, thereby tightly clamping the flue pipe and ensuring a tight connection between the flue pipe and the flue pipe mounting ring 5, preventing the flue pipe from falling off and flue gas leakage. Connection between the mounting base 41 and the connecting pipe 3: After the flue is installed in the flue mounting ring 5, it is inserted into the mounting base 41. At this time, the mounting base 41 and the connecting pipe 3 are fixedly connected. A gathering strap 42 is fixedly provided on the outside of the mounting base 41. The inner wall of the gathering strap 42 is provided with an elastic band 43. The elastic band 43 is an elastic nylon band with an anti-slip groove structure on the surface. The elastic band 43 is placed in the clamping grooves 45 on both sides of the mounting base 41. Then, the gathering strap 42 is wrapped around the outside of the flue mounting ring 5. The fastening screw 47 is passed through the positioning hole 44 and threaded through the gathering strap 42 and screwed into the mounting base 41. Since the fastening screw 47 is located inside the insertion hole 46, the gathering strap 42 will tighten when the fastening screw 47 is tightened. The anti-slip groove of the elastic band 43 can increase the friction with the flue mounting ring 5, further ensuring the stability of the connection.

[0039] Connect the exhaust pipe 2 to other parts of the exhaust system. Since the exhaust pipe 2 is designed with an angled opening, it is easier to connect with other pipes. It also helps to guide the flow direction of the flue gas and reduce the resistance and turbulence of the flue gas at the connection point. When the exhaust equipment is working, the generated flue gas enters the intermediate plate 1 through the exhaust pipe 2, and then passes through the connecting pipe 3, the flue pipe mounting ring 5 and the flue pipe to be discharged outdoors. During normal exhaust process, due to the flow pressure of the flue gas, the check valve is in the open state to ensure that the flue gas is discharged smoothly.

[0040] When the smoke exhaust equipment stops working, there may be backflow of flue gas in the flue. At this time, due to the lack of positive pressure from the flue gas, the check valve will close under its own structural gravity, preventing the flue gas in the flue from flowing back into the room through the check valve, thus preventing backflow of flue gas. If it is necessary to disassemble or maintain the check valve, first loosen the fastening nut 9 to loosen the deformation band 6, and then loosen the fastening screw 47 to loosen the tightening band 42. In this way, the flue pipe can be pulled out from the flue pipe mounting ring 5, and then the check valve can be cleaned, inspected, etc.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A check valve for smoke exhaust, comprising an intermediate plate (1), characterized in that: One side of the intermediate plate (1) is fixedly provided with a connecting pipe (3), and the other side of the connecting pipe (3) is provided with a pipe installation assembly (4); The pipe installation assembly (4) includes a mounting base (41) fixed to the connecting pipe (3). A gathering band (42) is fixed on the outside of the mounting base (41). A flue pipe mounting ring (5) is inserted into the inside of the mounting base (41). An annular groove is opened on the outside of the flue pipe mounting ring (5). A deformation band (6) is pressed into the annular groove of the flue pipe mounting ring (5).

2. The smoke exhaust check valve according to claim 1, characterized in that: The inner wall of the gathering band (42) is provided with an elastic band (43), and the elastic band (43) is an elastic nylon band with an anti-slip toothed groove structure on the surface.

3. A check valve for smoke exhaust according to claim 1, characterized in that: The surface of the gathering strap (42) is provided with a positioning hole (44), and a fastening screw (47) that is spirally arranged with the mounting base (41) passes through the interior of the positioning hole (44). The bottom center of the mounting base (41) is provided with an insertion hole (46), and the fastening screw (47) is located inside the insertion hole (46).

4. A check valve for smoke exhaust according to claim 1, characterized in that: The mounting base (41) has clamping grooves (45) on both sides, and the elastic band (43) is located inside the clamping grooves (45).

5. A check valve for smoke exhaust according to claim 1, characterized in that: The outer side of the flue installation ring (5) is provided with an annular groove, and the deformation band (6) is located inside the annular groove. The deformation band (6) is made of deformable steel strip.

6. A check valve for smoke exhaust according to claim 5, characterized in that: One end of the deformation belt (6) is fixedly provided with a limiting ring (7), and a long screw (8) fixed to the other end of the deformation belt (6) is inserted into the inside of the limiting ring (7).

7. A check valve for smoke exhaust according to claim 6, characterized in that: The outer side of the long screw (8) is provided with a fastening nut (9) that fits against the limiting ring (7).

8. A check valve for smoke exhaust according to claim 6, characterized in that: The other side of the intermediate plate (1) is connected to a smoke exhaust pipe (2), and the smoke exhaust pipe (2) is designed with an angled opening.

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