Overpressure exhaust valve

Abstract

The utility model relates to the technical field of civil air defense, in particular to an overpressure exhaust valve. The technical problem is that an existing overpressure exhaust valve does not have the capacity of adjusting the pressure needed for automatically opening the valve. According to the technical scheme, the overpressure exhaust valve comprises an outer frame, a baffle disc, a lever and the like; the lower part of the outer frame is rotationally connected with a lever; the upper part of the lever is fixedly connected with a baffle plate; and the baffle disc is contacted with the outer frame. According to the utility model, the elastic sheet is arranged between the lever and the outer frame, when the lever rotates around the rotating shaft connected with the outer frame, the elastic force of the elastic sheet needs to be overcome, so that the pressure difference required for opening the baffle disc is increased, and the closer the elastic sheet is arranged on the rotating shaft connected with the lever and the outer frame, the larger the required pressure difference is; as the length of the force arm of the lever for applying the acting force to the elastic sheet is shortened, the required force is increased, and the required pressure difference is increased.

Description

Technical Field

[0001] The present application relates to the field of civil air defense technology, and in particular to an overpressure exhaust valve. Background Art

[0002] In order to improve the effect of civil air defense safety, the protection of the ventilation systems of some underground buildings cannot be ignored. For example, in order to avoid damage from external shock waves and other factors and to facilitate internal exhaust ventilation, some vents are generally equipped with overpressure exhaust valve structures for protection; however, the current overpressure exhaust valves do not have the ability to adjust the pressure required to automatically open the valve, and depending on the internal environment and occasions of the main building, it is sometimes necessary to flexibly adjust the pressure required for exhaust to improve the applicability of the device. Utility Model Content

[0003] In order to overcome the shortcoming that the existing overpressure exhaust valve has no ability to adjust the pressure required for automatically opening the valve, the utility model provides an overpressure exhaust valve.

[0004] Technical solution: An overpressure exhaust valve includes an outer frame, a baffle and a lever; the lower part of the outer frame is rotatably connected to the lever; the upper part of the lever is fixedly connected to the baffle; the baffle is in contact with the outer frame.

[0005] More preferably, a sealing ring is provided at the contact point between the baffle and the outer frame to enhance the sealing effect.

[0006] More preferably, it further comprises a screw and a nut; the screw is plugged into the front of the outer frame; the screw is plugged into the lever; and the nut is screwed onto the screw.

[0007] More preferably, it also includes a mounting plate, a sleeve rod, an elastic sheet and a limit plate; the mounting plate is fixedly connected to the lower side of the outer frame; a number of sleeve rods are fixedly connected to the mounting plate; an elastic sheet is inserted on a sleeve rod; a number of limit plates are fixedly connected to the lever; the elastic sheet is located between two adjacent limit plates.

[0008] More preferably, a plurality of annular protrusions are provided on the sleeve rod to prevent the elastic sheet from popping out.

[0009] More preferably, the rear portion of the elastic sheet is arranged as a guide portion to facilitate insertion between two adjacent limiting plates.

[0010] Compared with the prior art, the utility model has the following advantages: the utility model arranges an elastic sheet between the lever and the outer frame, and when the lever rotates around the rotating shaft connected to the outer frame, it is necessary to overcome the elastic force of the elastic sheet, thereby increasing the pressure difference required to open the baffle. The closer the elastic sheet is arranged to the rotating shaft connecting the lever and the outer frame, the greater the required pressure difference, because the length of the force arm through which the lever applies the force to the elastic sheet becomes shorter, the required force becomes greater, and thus the required pressure difference becomes greater. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of a first three-dimensional structure of an overpressure exhaust valve of the utility model;

[0012] Figure 2 This is a schematic diagram of a second three-dimensional structure of the overpressure exhaust valve of the utility model;

[0013] Figure 3 It is a partial three-dimensional structural schematic diagram of the overpressure exhaust valve of the utility model;

[0014] Figure 4 It is a schematic diagram of the three-dimensional structure of the elastic sheet of the overpressure exhaust valve of the utility model.

[0015] Among them, the above-mentioned drawings include the following figure marks: 1-outer frame, 2-baffle, 3-lever, 4-screw, 5-nut, 6-mounting plate, 7-sleeve rod, 8-elastic sheet, 9-limiting plate. DETAILED DESCRIPTION

[0016] Although the present invention may be described with respect to a specific application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as: above, below, upward, downward, etc. are used to describe the drawings and do not represent limitations on the scope of the present invention as defined by the appended claims. Any numerical designations such as: first or second are merely exemplary and are not intended to limit the scope of the present invention in any way.

[0017] Example

[0018] An overpressure exhaust valve, such as Figure 1-4 As shown, it includes an outer frame 1, a baffle 2 and a lever 3; the lower part of the outer frame 1 is rotatably connected to the lever 3; the baffle 2 is welded to the upper part of the lever 3; and the baffle 2 is in contact with the outer frame 1.

[0019] A sealing ring is provided at the contact point between the baffle plate 2 and the outer frame 1 to enhance the sealing effect.

[0020] It also includes a screw rod 4 and a nut 5; the screw rod 4 is plugged into the front of the outer frame 1; the screw rod 4 is plugged into the lever 3; and the screw rod 4 is screwed with the nut 5.

[0021] It also includes a mounting plate 6, a sleeve rod 7, an elastic sheet 8 and a limit plate 9; a mounting plate 6 is welded to the lower side of the outer frame 1; four sleeve rods 7 are welded to the mounting plate 6; an elastic sheet 8 is inserted on a sleeve rod 7; five limit plates 9 are welded on the lever 3; the elastic sheet 8 is located between two adjacent limit plates 9.

[0022] The sleeve rod 7 is provided with a plurality of annular protrusions for preventing the elastic sheet 8 from popping out.

[0023] The rear portion of the elastic sheet 8 is arranged as a guide portion, so as to facilitate insertion between two adjacent limiting plates 9 .

[0024] When using the overpressure exhaust valve, install the overpressure exhaust valve in the specified position. Normally, the outer frame 1 is in close contact with the baffle plate 2, and the middle part of the lever 3 is fixed by the screw 4 and the nut 5, so as to prevent the lever 3 from rotating freely. The lever 3 is located indoors, so that the baffle plate 2 blocks the vent of the outer frame 1 to prevent the external shock wave from entering the room; when overpressure exhaust is required indoors, unscrew the screw 4 and the nut 5, and no longer fix the middle part of the lever 3, that is, the lever 3 can rotate around the rotating shaft connected to the outer frame 1. When the indoor pressure exceeds the external pressure, the pressure difference from right to left will force the lever 3 to rotate clockwise around the rotating shaft connected to the outer frame 1, and the lever 3 will drive the baffle plate 2 to rotate and open, so that a gap will appear between the baffle plate 2 and the outer frame 1, so that the indoor overpressure gas can be discharged to the outside, balancing the indoor and external pressures;

[0025] When it is necessary to adjust the pressure difference required to open the baffle 2 in order to flexibly adjust the assembly for use to adapt to different internal spaces and occasion conditions, the staff will insert the lower part of an elastic sheet 8 between two adjacent limit plates 9, and the rear part of the elastic sheet 8 is set as a guide part to facilitate insertion between the two adjacent limit plates 9. The upper part of the elastic sheet 8 is inserted into the corresponding sleeve rod 7, so that when the lever 3 rotates around the rotating shaft connected to the outer frame 1, it is still necessary to overcome the elastic force of the elastic sheet 8, thereby increasing the pressure difference required to open the baffle 2. The closer the elastic sheet 8 is set to the rotating shaft connecting the lever 3 and the outer frame 1, the greater the required pressure difference. Because the length of the force arm for the lever 3 to apply the force to the elastic sheet 8 becomes shorter, the required force becomes larger, and thus the required pressure difference becomes larger.

[0026] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An overpressure exhaust valve, characterized in that: It comprises an outer frame (1), a baffle (2) and a lever (3); the lower part of the outer frame (1) is rotatably connected to the lever (3); the upper part of the lever (3) is fixedly connected to the baffle (2); the baffle (2) is in contact with the outer frame (1); A sealing ring is provided at the contact point between the baffle plate (2) and the outer frame (1) for enhancing the sealing effect; the baffle plate (2) further comprises a screw rod (4) and a nut (5); the screw rod (4) is plugged into the front of the outer frame (1); the screw rod (4) is plugged into the lever (3); the screw rod (4) is screwed with the nut (5); the baffle plate (6), a sleeve rod (7), an elastic sheet (8) and a limit plate (9); the lower side of the outer frame (1) is fixedly connected to the mounting plate (6); a plurality of sleeve rods (7) are fixedly connected to the mounting plate (6); an elastic sheet (8) is plugged into a sleeve rod (7); a plurality of limit plates (9) are fixedly connected to the lever (3); the elastic sheet (8) is located between two adjacent limit plates (9).

2. An overpressure exhaust valve according to claim 1, characterized in that: A plurality of annular protrusions are provided on the sleeve rod (7) for preventing the elastic sheet (8) from popping out.

3. An overpressure exhaust valve according to claim 1, characterized in that: The rear portion of the elastic sheet (8) is arranged as a guide portion to facilitate insertion between two adjacent limiting plates (9).

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