Pipeline airflow reverse penetration protection device

Abstract

The utility model discloses a pipeline airflow reverse penetration protection device which comprises a pipe body and a non-return cover, the pipe body is provided with an airflow channel and two communication ports communicated with the airflow channel, one of the two communication ports is defined as an outer communication port, the other communication port is defined as an inner communication port, and the non-return cover is rotationally connected with the pipe body on one side of the outer communication port. The non-return cover is provided with a water absorption piece capable of enabling the non-return cover to turn over to close the outer through opening and a balance weight piece capable of enabling the non-return cover to turn over to open the outer through opening, and the water absorption piece is arranged on the side, back to the outer through opening, of the non-return cover. The non-return cover which is rotationally connected with the pipe body and used for opening and closing the outer through opening is arranged on one side of the outer through opening, and the water absorption piece enabling the non-return cover to turn over to close the outer through opening and the balance weight piece enabling the non-return cover to turn over to open the outer through opening are arranged on the non-return cover, so that the non-return cover closes the outer through opening when outdoor air is wet. And when the outdoor air is dry, the outer through opening is opened, the outdoor air is prevented from being injected into a room when the outdoor air is wet, and meanwhile, normally-open ventilation of the outer through opening is achieved when the outdoor air is dry.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust devices, in particular to a pipeline airflow back-penetration protection device. Background Art

[0002] An exhaust device is a device used to pump indoor air to the outside to speed up the indoor air flow. It includes an exhaust pipe connecting the indoor and outdoor and an exhaust fan installed on the exhaust pipe. Since the exhaust pipe connects the indoor and outdoor, when the exhaust fan does not work and the outdoor air pressure is greater than the indoor air pressure, the outdoor gas will flow back into the room through the exhaust pipe and affect the indoor environment. For example, when the high humidity and high temperature air flows back into the room through the exhaust pipe during the return of the south wind, the indoor environment will become hot and humid. Utility Model Content

[0003] The utility model aims to provide a pipeline airflow backflow protection device to solve the problem that when the exhaust fan of the existing exhaust device does not work and the outdoor air pressure is greater than the indoor air pressure, the outdoor air flows back into the room through the exhaust pipe and affects the indoor environment.

[0004] The utility model is realized by the following technical solutions:

[0005] A pipeline airflow backflow protection device includes a pipe body and a non-return cover, the pipe body has an airflow channel and two connecting ports, the two connecting ports are respectively arranged at the axial ends of the pipe body and are connected to the airflow channel, one of the two connecting ports is defined as an external port, and the other connecting port is defined as an internal port, the non-return cover is rotatably connected to the pipe body at one side of the external port, the non-return cover is provided with a water absorbing part that can make it flip over to close the external port, and a counterweight part that can make it flip over to open the external port, and the water absorbing part is provided on the side of the non-return cover facing away from the external port.

[0006] Furthermore, the non-return cover is rotatably connected to the tube body above the external opening, and a non-return surface is defined on the side of the tube body that abuts against the non-return cover when the non-return cover closes the external opening, and the non-return surface is inclined from bottom to top toward the internal opening.

[0007] Furthermore, the angle θ between the anti-return surface and the vertical surface is in the range of 18° to 22°.

[0008] Further, the water absorbing member and the counterweight member are arranged opposite to each other in the radial direction of the non-return cover; and / or the water absorbing member is arranged at the lower end of the non-return cover, and the counterweight member is arranged at the upper end of the non-return cover.

[0009] Furthermore, the counterweight is detachably fixedly connected to the anti-return cover.

[0010] Furthermore, the tube body has two pivotal parts which are radially opposite to each other and located above the external opening, and the anti-return cover has an axial connection part which is pivotally matched with the two pivotal parts.

[0011] Furthermore, at least one of the pivotal parts is provided with a first magnetic attraction component, and the anti-return cover is provided with an upper magnetic attraction component that magnetically cooperates with the first magnetic attraction component.

[0012] Furthermore, the airflow channel is provided with a mounting column on the inner wall of its end portion close to the external opening, the mounting column is provided with a second magnetic component, and the anti-return cover is provided with a lower magnetic component that magnetically cooperates with the second magnetic component.

[0013] Furthermore, the non-return cover has an axial protrusion that extends into the airflow channel when the non-return cover closes the external opening and a sealing groove arranged outside the axial protrusion, and a sealing ring is arranged in the sealing groove to stop on the tube body when the non-return cover closes the external opening.

[0014] The advantage of the technical solution is that a non-return cover rotatably connected to the pipe body for opening and closing the external opening is provided on one side of the external opening, and a water absorbing part for turning the non-return cover to close the external opening and a counterweight part for turning the non-return cover to open the external opening are provided, so that the non-return cover closes the external opening when the outdoor air is humid and opens the external opening when the outdoor air is dry, thereby preventing the outdoor air from entering the room when it is humid, and at the same time achieving normal ventilation of the external opening when the outdoor air is dry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0017] Figure 1 It is a three-dimensional diagram of the pipeline airflow back-penetration protection device disclosed in the embodiment;

[0018] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0019] Figure 3 The embodiment disclosed the cross-sectional view of the pipeline airflow backflow protection device Figure 1 (The non-return cover opens the external opening);

[0020] Figure 4The embodiment disclosed the cross-sectional view of the pipeline airflow backflow protection device Figure 2 (The non-return cover closes the external opening);

[0021] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0022] Figure 6 It is an exploded view of the pipeline airflow back-penetration protection device disclosed in the embodiment;

[0023] Figure 7 is a three-dimensional diagram of a tube body in an embodiment;

[0024] Figure 8 It is an assembly diagram of the stop cover, the water absorbing member and the counterweight member in direction one of the embodiment;

[0025] Fig. 9 It is an assembly diagram of the stop cover, the water absorbing member and the counterweight member in direction one of the embodiment. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example: Figure 1-9 As shown, the pipeline air flow backflow protection device includes a pipe body 1 and a non-return cover 2, the pipe body 1 has an air flow channel 101 and two connecting ports 102, the two connecting ports 102 are respectively arranged at the axial ends of the pipe body 1 and are connected to the air flow channel 101, of the two connecting ports 102, one connecting port 102 is defined as an external port 111, and the other connecting port 102 is defined as an internal port 112, the non-return cover 2 is rotatably connected to the pipe body 1 on one side of the external port 111, the non-return cover 2 is provided with a water absorbing member 3 which can make it flip over to close the external port 111, and a counterweight member 4 which can make it flip over to open the external port 111, the water absorbing member 3 is arranged on the side of the non-return cover 2 away from the external port 111, and the water absorbing member 3 is made of a water absorbing material for absorbing moisture in the air.

[0028] Among them, the water absorbing member 3 can make the check cover 2 rotate around the connection O' between the check cover 2 and the tube body 1 to close the external opening 111, and the counterweight member 4 can make the check cover 2 rotate around the connection O' between the check cover 2 and the tube body 1 to open the external opening 111. The torque of the water absorbing member 3 driving the check cover 2 to rotate and close the external opening 111 is defined as M1, and the torque of the counterweight member 4 driving the check cover 2 to rotate and open the external opening 111 is defined as M2. When the outdoor air is humid, the water absorbing member 3 absorbs water and increases in weight so that M1 is greater than M2, and the non-return cover 2 flips over to close the external opening 111; when the outdoor air is dry, the water absorbing member 3 dehydrates and loses weight so that M1 is less than M2, and the non-return cover 2 flips over to open the external opening 111 (in a normally open state); when the exhaust fan (not shown in the figure) provided on one side of the internal opening 112 is started, the non-return cover 2 overcomes the gravity of the water absorbing member 3 under the push of the airflow and flips over to open the external opening 111 for exhaust.

[0029] In summary, the present embodiment provides a pipeline airflow backflow protection arrangement to solve the problem of outdoor gas flowing back into the room through the exhaust pipe and affecting the indoor environment when the exhaust fan of the existing exhaust device is not working and the outdoor air pressure is greater than the indoor air pressure. The arrangement is mainly carried out by providing a non-return cover 2 on one side of the external opening 111, which is rotatably connected to the pipe body 1 and is used to open and close the external opening 111, and providing a water absorbing part 3 and a counterweight part 4 on the non-return cover 2, which are used to flip and close the external opening 111, so that the non-return cover 2 closes the external opening 111 when the outdoor air is humid (the exhaust fan is turned off), and opens the external opening 111 when the outdoor air is dry (the exhaust fan is turned off), so as to prevent the outdoor air from entering the room when it is humid, and at the same time, the external opening 111 is always opened for ventilation when the outdoor air is dry.

[0030] In the embodiment of the utility model, the non-return cover 2 is rotatably connected to the tube body 1 above the external opening 111. When the non-return cover 2 closes the external opening 111, the side of the tube body 1 that abuts against the non-return cover 2 is defined as a non-return surface 103, and the non-return surface 103 is inclined from bottom to top toward the inner opening 112. The above arrangement sets the non-return surface 103 to be inclined from bottom to top toward the inner opening 112, so that the non-return cover 2 has a downward flipping movement tendency when closing the external opening 111, and the closing effect is good.

[0031] In the embodiment of the utility model, the value range of the angle θ between the anti-return surface 103 and the vertical surface is: 18° to 22°.

[0032] In the embodiment of the utility model, the water absorbing member 3 and the weight member 4 are arranged opposite to each other in the radial direction of the non-return cover 2. Preferably, the water absorbing member 3 is arranged at the lower end of the non-return cover 2, and the weight member 4 is arranged at the upper end of the non-return cover 2. Since the water absorbing member 3 is arranged at the lower end of the non-return cover 2 and the weight member 4 is arranged at the upper end of the non-return cover 2, the water absorbing member 3 and the weight member 4 have a large moment, which facilitates the non-return cover 2 to flip up to open the external opening 111 or flip down to close the external opening 111.

[0033] In the embodiment of the utility model, the counterweight 4 is detachably fixedly connected to the anti-return cover 2. Specifically, the counterweight 4 is cylindrical, and the counterweight 4 is locked to the upper end of the anti-return cover 2 by bolts (not shown in the figure). Since the counterweight 4 is detachably fixedly connected to the anti-return cover 2, the counterweight 4 is easy to disassemble and replace.

[0034] In the embodiment of the utility model, the tube body 1 has two pivotal parts 104 which are opposite to each other in the radial direction and are located above the external opening 111, and the anti-return cover 2 has an axial connection part 201 which is pivotally matched with the two pivotal parts 104. The above arrangement is provided above the external opening 111 with two pivotal parts 104 which are opposite to each other in the radial direction of the tube body 1 and are pivotally matched with the axial connection part 201, so that the anti-return cover 2 is stably connected to the tube body 1 and rotates smoothly.

[0035] In the embodiment of the utility model, at least one pivot part 104 is provided with a first magnetic member 105, and the anti-return cover 2 is provided with an upper magnetic member 202 that magnetically cooperates with the first magnetic member 105. The above arrangement is provided by providing the first magnetic member 105 on the pivot part 104, and providing the upper magnetic member 202 that magnetically cooperates with the first magnetic member 105 on the anti-return cover 2, so that the anti-return cover 2 has a better closing effect when closing the external opening 111.

[0036] In the embodiment of the utility model, the airflow channel 101 is provided with a mounting column 106 on the inner wall of the end portion thereof close to the external opening 111, the mounting column 106 is provided with a second magnetic member 107, and the anti-return cover 2 is provided with a lower magnetic member 203 that magnetically cooperates with the second magnetic member 107. The above arrangement is provided by providing the mounting column 106 in the airflow channel 101, providing the second magnetic member 107 on the mounting column 106, and providing the lower magnetic member 203 that magnetically cooperates with the second magnetic member 107 on the anti-return cover 2, so that the anti-return cover 2 has a good closing effect when closing the external opening 111.

[0037] In the embodiment of the utility model, the upper magnetic member 202 and the lower magnetic member 203 are opposite to each other up and down, the upper magnetic member 202 is on the top, and the lower magnetic member 203 is on the bottom.

[0038] In the embodiment of the utility model, the non-return cover 2 has a shaft protrusion 204 extending into the air flow channel 101 when the non-return cover 2 closes the external opening 111, and a sealing groove 205 arranged outside the shaft protrusion 204, and a sealing ring 206 is arranged in the sealing groove 205 to stop against the tube body 1 when the non-return cover 2 closes the external opening 111. The above arrangement allows the non-return cover 2 to have good air tightness when closing the external opening 111 by setting the sealing ring 206 in the sealing groove 205 to stop against the tube body 1 when the non-return cover 2 closes the external opening 111.

[0039] It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center of a circle", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the utility model is not limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or some technical deductions or replacements made on the premise of the concept of the utility model should be regarded as the protection of the utility model.

Claims

1. The pipeline airflow back-penetration protection device is characterized by: It includes a tube body and a non-return cover, the tube body has an airflow channel and two connecting ports, the two connecting ports are respectively arranged at the axial ends of the tube body and are connected with the airflow channel, one of the two connecting ports is defined as an external port, and the other connecting port is defined as an internal port, the non-return cover is rotatably connected to the tube body at one side of the external port, the non-return cover is provided with a water absorbing part which can make it flip over to close the external port, and a counterweight part which can make it flip over to open the external port, and the water absorbing part is provided on the side of the non-return cover facing away from the external port.

2. The pipeline airflow backflow protection device according to claim 1 is characterized in that: The non-return cover is rotatably connected to the tube body above the external opening, and a non-return surface is defined on the side of the tube body that abuts against the non-return cover when the non-return cover closes the external opening, and the non-return surface is inclined from bottom to top toward the internal opening.

3. The pipeline airflow backflow protection device according to claim 2 is characterized in that: The value range of the included angle θ between the non-return surface and the vertical surface is: 18° to 22°.

4. The pipeline airflow backflow protection device according to claim 2 is characterized in that: The water absorbing member and the weight balancing member are arranged opposite to each other in the radial direction of the non-return cover; and / or the water absorbing member is arranged at the lower end of the non-return cover, and the weight balancing member is arranged at the upper end of the non-return cover.

5. The pipeline airflow backflow protection device according to claim 1 is characterized in that: The counterweight is detachably fixedly connected to the anti-return cover.

6. The pipeline airflow backflow protection device according to claim 1 is characterized in that: The tube body has two pivotal parts which are radially opposite to each other and are located above the outer opening, and the anti-return cover has an axial connection part which is pivotally matched with the two pivotal parts.

7. The pipeline airflow backflow protection device according to claim 6 is characterized in that: A first magnetic attraction component is disposed on at least one of the pivoting parts, and an upper magnetic attraction component that magnetically cooperates with the first magnetic attraction component is disposed on the anti-return cover.

8. The pipeline airflow backflow protection device according to claim 1 is characterized in that: The airflow channel is provided with a mounting column on the inner wall of its end portion close to the external opening, the mounting column is provided with a second magnetic attraction component, and the anti-return cover is provided with a lower magnetic attraction component that magnetically cooperates with the second magnetic attraction component.

9. The pipeline airflow backflow protection device according to claim 1 is characterized in that: The non-return cover comprises an axial protrusion extending into the airflow channel when the non-return cover closes the external opening and a sealing groove arranged outside the axial protrusion, wherein a sealing ring is arranged in the sealing groove and abuts against the tube body when the non-return cover closes the external opening.

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