Non-return mechanism for ventilator outlet

Abstract

The utility model belongs to the technical field of ventilator equipment, and particularly relates to a non-return mechanism for a ventilator outlet, which comprises a non-return valve body, an observation assembly and a pressure measuring assembly, the non-return valve body comprises a rotating shaft and a baffle, the baffle is rotatably connected with the inner wall of an air door panel through the rotating shaft, the air door panel is provided with a receding groove matched with the observation assembly, and the pressure measuring assembly is arranged in the receding groove. The check valve has the advantages that in the operation process of a fan, the opening degree of a baffle of the check valve can be observed in real time, and the influence of the check valve on system resistance can be evaluated in time.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilator equipment, in particular to a non-return mechanism for a ventilator outlet. Background Art

[0002] A check valve is a valve that opens and closes automatically by the force of the medium flow to prevent the medium from flowing back. It is used in the field of fans and plays an important role in preventing gas backflow. The check valve used in ventilators is mostly a baffle structure that rotates around an axis. When the fan starts, the airflow blows the baffle open. When the fan stops, the baffle closes under its own weight, thereby blocking the gas backflow. This type of check valve is generally located at the outlet of the fan, with various sizes and non-standard structures. Since the opening of the baffle cannot be intuitively observed when used in the pipeline, if the check valve is not of the right size, the insufficient opening will increase the resistance of the system, thereby affecting the air volume of the fan and failing to meet the customer's ideal parameter requirements. In addition, it is impossible to timely evaluate whether the resistance of the check valve affects the operation of the ventilation system, which causes great trouble to the troubleshooting of the fan. Utility Model Content

[0003] The utility model aims at the above-mentioned problems and specifically designs a non-return mechanism for a ventilator outlet, so that the opening of the non-return valve baffle can be observed in real time during the operation of the fan, and the influence of the non-return valve on the system resistance can be timely evaluated.

[0004] To achieve the above-mentioned purpose, the utility model provides a check mechanism for a ventilator outlet, comprising a check valve body, an observation assembly and a pressure measuring assembly, the check valve body comprising a rotating shaft and a baffle, the baffle being rotatably connected to a damper panel via the rotating shaft, the damper panel being provided with a clearance groove matching the observation assembly, the observation assembly being fixedly connected to the damper panel, and the pressure measuring assembly being connected to the inlet and outlet of the check valve body.

[0005] Preferably, the observation assembly includes an annular base, an observation window, a fixed flange and a fastener, the observation window is crimped between the annular base and the fixed flange and matches the clearance groove, and the fastener is threadedly connected to the fixed flange, the annular base and the damper panel in sequence.

[0006] Preferably, the observation window is a transparent glass window, and the diameter is not less than the inner diameter of the annular base and the fixing flange.

[0007] Preferably, the pressure measuring assembly includes a sampling tube and a differential pressure gauge, and the sampling tube has multiple groups, one end of which is respectively connected to the interface of the differential pressure gauge, and the other end passes through the damper panel and is arranged at the inlet and outlet of the check valve body.

[0008] Preferably, the sampling tube is provided with a pressure cover, and the pressure cover is fixedly crimped to the interface of the differential pressure gauge.

[0009] In summary, the utility model has the following advantages and beneficial technical effects:

[0010] 1. With the aid of the observation component, the utility model realizes the effect of observing the opening and closing degree of the check valve at any time, intuitively understands the operation condition of the check valve in the pipeline, and saves the time and cost for troubleshooting the ventilation fan.

[0011] 2. The pressure measurement component is provided to measure the pressure difference between two points at the inlet and outlet of the check valve, and to monitor the operation parameters of the fan in real time, so as to indirectly evaluate the influence of the check valve on the system during the operation of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic cross-sectional view of the present utility model;

[0015] Figure 3 is a schematic cross-sectional view of the observation component in the present utility model;

[0016] Figure 4 is a schematic structural diagram of the observation component in the present utility model;

[0017] Figure 5 is a schematic structural diagram of the pressure measurement component in the present utility model.

[0018] The reference numerals in the drawings are:

[0019] 1. Check valve body; 11. Rotating shaft; 12. Baffle;

[0020] 2. Observation component; 21. Ring base; 22. Observation window; 23. Fixed flange; 24. Fastener;

[0021] 3. Pressure measurement component; 31. Sampling pipe; 32. Differential pressure gauge; 33. Gland; 4. Damper panel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the present utility model in detail with reference to the attached Figures 1 - 5 drawings:

[0023] As Figures 1 - 2As shown in the figure, this embodiment discloses a check mechanism for the outlet of a ventilator, which includes a check valve body 1, an observation assembly 2, and a pressure measurement assembly 3. The check valve body 1 includes a rotating shaft 11 and a baffle 12, which are arranged near the outlet of the damper panel 4. The baffle 12 is rotatably connected to the inner wall of the damper panel 4 through the rotating shaft 11. The damper panel 4 is provided with a relief groove matching the observation assembly 2. The observation assembly 2 is fixedly installed on the outer wall of the damper panel 4. The pressure measurement assembly 3 penetrates the damper panel 4 and communicates with the inlet and outlet ends of the check valve body 1.

[0024] As Figures 3 - 4 shown in the figure, the observation assembly 2 includes an annular base 21, an observation window 22, a fixed flange 23, and a fastener 24. The relief groove matches the observation window 22. The observation window 22 is pressed between the annular base 21 and the fixed flange 23, and the observation direction is perpendicular to the axis of the rotating shaft 11. The damper panel 4 is drilled with threaded holes. The fastener 24 is a fastening bolt, which is sequentially threadedly connected to the fixed flange 23, the annular base 21, and the damper panel 4; the observation window 22 is a transparent glass window, and its diameter is equal to the outer diameter of the annular base 21.

[0025] As Figure 5 shown in the figure, the pressure measurement assembly 3 includes a sampling pipe 31 and a differential pressure gauge 32. The two ends of the sampling pipe 31 are respectively connected to the interface of the differential pressure gauge 32 and the damper panel 4. There are two sampling pipes 31, which are connected to the inlet and outlet positions of the check valve body 1; the sampling pipe 31 is sleeved with a rigid gland 33, and the gland 33 is threadedly screwed at the interface of the differential pressure gauge 32.

[0026] The working principle of a check mechanism for the outlet of a ventilator of the present utility model is as follows:

[0027] During the operation of the ventilator equipment using this check valve, employees can understand the internal structure of the damper panel 4 through the observation window 22 made of transparent glass material, and observe the opening degree of the baffle 12 in the check valve body 1 in real time; the air flow at the inlet and outlet positions of the check valve body 1 is collected by means of the sampling pipe 31, and the value on the differential pressure gauge 32 is read to obtain the pressure difference, so as to indirectly evaluate the influence of the check valve on the resistance of the ventilation system.

[0028] The above are all the preferred embodiments of the present utility model. The protection scope of the present utility model is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A check mechanism for the outlet of a ventilator, characterized in that: It includes a check valve body, an observation component and a pressure measuring component. The check valve body includes a rotating shaft and a baffle. The baffle is rotatably connected to a damper panel via the rotating shaft. The damper panel is provided with a clearance groove matching the observation component. The observation component is fixedly connected to the damper panel. The pressure measuring component is connected to the inlet and outlet of the check valve body.

2. The check mechanism for the outlet of a ventilator according to claim 1, wherein: The observation assembly includes an annular base, an observation window, a fixed flange and a fastener. The observation window is crimped between the annular base and the fixed flange and matches the clearance groove. The fastener is threadedly connected to the fixed flange, the annular base and the damper panel in sequence.

3. The check mechanism for the outlet of a ventilator according to claim 2, characterized in that: The observation window is a transparent glass window, and the diameter thereof is not less than the inner diameter of the annular base and the fixing flange.

4. The check mechanism for the outlet of a ventilator according to claim 3, characterized in that: The pressure measuring assembly includes a sampling tube and a differential pressure gauge. The sampling tube has multiple groups, one end of which is connected to the interface of the differential pressure gauge, and the other end passes through the damper panel and is arranged at the inlet and outlet of the check valve body.

5. The check mechanism for the outlet of a ventilator according to claim 4, characterized in that: The sampling tube is provided with a pressure cover, and the pressure cover is fixedly pressed onto the interface of the differential pressure gauge.

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