Air volume adjusting structure for fire-fighting positive-pressure air supply valve

Abstract

The utility model discloses an air volume adjusting structure for a fire-fighting positive pressure air supply valve, which comprises a control actuator positioned at an air supply outlet, an air valve handle used for controlling air valve blades is arranged on the disc surface of the control actuator, and an arc track is arranged on the disc surface of the control actuator. A plurality of threaded positioning holes are formed in the arc track, and positioning pins used for blocking the air valve handle are in threaded connection with the interiors of the threaded positioning holes. Compared with an existing positive-pressure air supply valve, the positive-pressure air supply valve has the advantages that the adjusting effect is added, the debugging cost during fire-fighting linkage can be greatly reduced, the residual pressure values of a staircase and a walkway can be independently adjusted layer by layer one by one, the debugging time is shortened, a powerful guarantee is provided for the construction period, the personnel investment is greatly reduced from the labor cost, and the working efficiency is improved. And a better debugging effect can be achieved, and the qualified rate of the fire-fighting linkage residual pressure system is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting positive-pressure air supply valves, in particular to an air volume regulating structure for fire-fighting positive-pressure air supply valves. Background Art

[0002] When a fire occurs, the existing fire protection positive pressure air supply valve will open the temperature sensor, smoke sensor or manual fire alarm, and the positive pressure fan on the roof will automatically open to pressurize the air supply shaft. The front room of the stairs will continuously supply air to the front room through the positive pressure air supply port to maintain the positive pressure in the front room. However, the regulations require that the pressure difference between the closed stairwell and the evacuation corridor should be 25Pa~30Pa; the pressure difference between the smoke-proof stairwell and the evacuation corridor should be 40Pa~50Pa. The general positive pressure air supply valve has no regulating function, resulting in the floors close to the fan having a large air volume and pressure, which cannot meet the standard residual pressure value, resulting in the escape door not opening smoothly. Utility Model Content

[0003] In view of the above technical problems in the related art, the utility model provides an air volume adjustment structure for a fire protection positive pressure air supply valve, which can solve the above problems.

[0004] In order to achieve the above technical purpose, the technical solution of the utility model is implemented as follows:

[0005] A wind volume adjustment structure for a fire-fighting positive-pressure air supply valve comprises a control actuator located at an air supply port, a wind valve handle for controlling the wind valve blades is provided on the disk of the control actuator, an arc track is provided on the disk of the control actuator, a plurality of threaded positioning holes are provided in the arc track, and positioning pins for blocking the wind valve handle are threadedly connected in the threaded positioning holes.

[0006] Furthermore, the circular arc track is located on the rotation track of the air valve handle, and the center of the circular arc track coincides with the center of the rotating shaft of the air valve handle.

[0007] Furthermore, the plurality of threaded positioning holes are arranged in a circular arc in the circular arc track, and the center angle of the two threaded positioning holes at the head and tail ends of the circular arc track is 90°.

[0008] Furthermore, when the air valve handle is blocked by the positioning pin inserted into the threaded positioning hole at the head end, the air valve blades are in a closed state; when the air valve handle is blocked by the positioning pin inserted into the threaded positioning hole at the tail end, the air valve blades are in a fully open state.

[0009] Furthermore, the lower end of the positioning pin is a threaded structure, and the upper end of the positioning pin is a butterfly structure.

[0010] The beneficial effects of the utility model are as follows: compared with the existing positive pressure air supply valve, the utility model has an increased regulating function, which can greatly reduce the debugging cost during fire linkage, and can adjust the residual pressure values ​​of stairwells and corridors individually floor by floor, thus shortening the debugging time, providing a strong guarantee for the construction period, and greatly reducing the personnel investment in terms of labor costs, and can also achieve better debugging effects, thereby improving the qualified rate of the fire linkage residual pressure system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] The utility model is further described in detail below with reference to the accompanying drawings.

[0013] Figure 1 It is a schematic diagram of an air volume adjustment structure for a fire protection positive pressure air supply valve according to an embodiment of the utility model;

[0014] Figure 2 It is a side view of the positioning pin described in the embodiment of the utility model connected to the control actuator disk.

[0015] In the figure:

[0016] 1. Threaded positioning hole; 2. Arc track; 3. Positioning pin; 4. Air valve handle; 4-1. Rotating shaft; 5. Control actuator. DETAILED DESCRIPTION

[0017] 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 in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0018] like Figure 1-2 As shown, according to the utility model, an air volume adjustment structure for a fire-fighting positive pressure air supply valve is disclosed, including a control actuator 5 located at the air supply port, a damper handle 4 for controlling the damper blades is provided on the disk of the control actuator 5, an arc track 2 is provided on the disk of the control actuator 5, a plurality of threaded positioning holes 1 are provided in the circular arc track 2, and a positioning pin 3 for blocking the damper handle 4 is threadedly connected in the threaded positioning hole 1.

[0019] Embodiment 1:

[0020] The present application can be applied to a fire-fighting positive pressure air supply system, wherein an arc track 2 is provided on the disk surface of the control actuator 5 of the air supply port, and a plurality of threaded positioning holes 1 are provided in the arc track 2, wherein the plurality of threaded positioning holes 1 are arranged in an arc shape in the arc track 2, and a certain angle is formed between two adjacent threaded positioning holes 1, and the screw hole center angle of the two threaded positioning holes 1 at the head and tail ends of the arc track 2 is 90°, and when the positioning pin 3 is inserted into the threaded positioning hole 1 at the head end to block the air valve handle 4, the corresponding state is that the air valve blade is closed ... When the air valve handle 4 is blocked in the threaded positioning hole 1 at the tail end, the air valve blades are in a fully open state. When the positioning pin 3 is inserted into the threaded positioning holes 1 at other different angles to block the air valve handle 4, the air valve blades have different opening angles (from the threaded positioning hole 1 at the head end to the threaded positioning hole 1 at the tail end, the opening angle of the air valve blades gradually increases). In this way, when the fire pulse signal is given to the positive pressure air supply valve, the air valve handle 4 is opened to the position of the positioning pin 3, thereby controlling the opening angle of the valve and adjusting the air supply volume to achieve the residual pressure value required by the specification.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air volume adjustment structure for a fire-fighting positive pressure air supply valve, comprising a control actuator (5) located at an air supply port, a valve handle (4) for controlling a valve blade is provided on a disk of the control actuator (5), characterized in that: A circular arc track (2) is provided on the disk surface of the control actuator (5), a plurality of threaded positioning holes (1) are provided in the circular arc track (2), and positioning pins (3) for blocking the air valve handle (4) are threadedly connected in the threaded positioning holes (1).

2. The air volume adjustment structure for a fire protection positive pressure air supply valve according to claim 1, characterized in that: The circular arc track (2) is located on the rotation track of the air valve handle (4), and the center of the circular arc track (2) coincides with the center of the rotating shaft (4-1) of the air valve handle (4).

3. The air volume adjustment structure for a fire-fighting positive pressure air supply valve according to claim 1, characterized in that: The plurality of threaded positioning holes (1) are arranged in an arc in the arc track (2), and the screw hole center angles of the two threaded positioning holes (1) at the head and tail ends of the arc track (2) are 90°.

4. The air volume adjustment structure for a fire protection positive pressure air supply valve according to claim 3, characterized in that: When the air valve handle (4) is blocked by the positioning pin (3) inserted into the threaded positioning hole (1) at the head end, the air valve blades are in a closed state; when the air valve handle (4) is blocked by the positioning pin (3) inserted into the threaded positioning hole (1) at the tail end, the air valve blades are in a fully open state.

5. The air volume adjustment structure for a fire-fighting positive pressure air supply valve according to claim 1, characterized in that: The lower end of the positioning pin (3) is a threaded structure, and the upper end of the positioning pin (3) is a butterfly structure.

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