Opening type fireproof valve
By introducing a stretching mechanism and a temperature-sensitive triggering device into the fire valve, the problem of fire valves that require manual triggering is solved, and automatic response is achieved at high temperatures, effectively blocking the spread of fire, with a simple structure and low cost.
Patent Information
- Application Number
- CN202421980570.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-14
AI Technical Summary
Existing fire valves need to be triggered manually and cannot automatically respond to fires without human beings, resulting in the inability to effectively block the spread of the fire.
A stretch-open fire valve is designed, including a stretch-opening mechanism and a temperature-sensitive triggering device, which automatically triggers the stretch-opening page to seal the pipe at high temperatures to achieve automatic fire response.
It realizes automatic triggering at high temperatures, blocking the spread of fire in a timely manner, with a simple and reliable structure, low cost, and no electrical components required, ensuring reliability and safety during fire.
Smart Images
Figure CN223137077U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of fire dampers, in particular to an expandable fire damper. Background Art
[0002] Fire dampers play a crucial role in the fire protection system, and their main functions are reflected in the following aspects:
[0003] Blocking the spread of fire: When a fire occurs, the fire damper can quickly respond and automatically close, thus effectively blocking the spread of flames and high-temperature smoke through the ventilation duct to other non-fire areas. This helps to control the fire, prevent the fire from expanding, and reduce the losses caused by the fire. Protecting personnel safety: The timely closing of the fire damper can prevent toxic smoke and high-temperature air from entering the evacuation passage or safe shelter area of personnel, creating favorable conditions for personnel evacuation and rescue work, and protecting the lives of personnel. Cooperating with the smoke exhaust system: In a fire, the function of the smoke exhaust system is to timely exhaust the smoke in the room to reduce the impact of smoke on personnel. The fire damper is usually used in cooperation with the smoke exhaust system. When the smoke exhaust system is working, the fire damper remains open to ensure the smooth exhaust of smoke; while when the fire spreads to the vicinity of the smoke exhaust duct, the fire damper automatically closes to prevent the fire from further spreading through the smoke exhaust duct. Fire separation: Inside a building, the fire damper can be used as a means of fire separation. By reasonably setting the fire damper, the building can be divided into different fire areas. Once a fire occurs in a certain area, the closing of the fire damper can prevent the fire from spreading to other areas, thus protecting the safety of the entire building. Improving the overall fire resistance performance of the building: As an important part of the fire protection system, the existence and effective operation of the fire damper can significantly improve the overall fire resistance performance of the building. By reasonably designing and installing the fire damper, a more secure and reliable fire protection system can be constructed, providing strong guarantee for the fire safety of the building.
[0004] For example, the Chinese patent with application number CN202322559732.1, the utility model provides a regulating valve fire damper body, which relates to the field of fire damper technology, including: a fire damper body; the top surface of the fire damper body has two groups of groove bolts with symmetrical threads; a fixed block is fixedly connected to the center of the upper part of the front end surface of the fire damper body; the fixed block is a rectangular block structure; the outside of the fire damper body is symmetrically fixedly connected to two installation frames; both installation frames are U-shaped block structures; the inner sides of the two installation frames are fixedly connected to a group of angle codes; the other sides of the two groups of angle codes are bolted to the outside of the fire damper body. The various components of the regulating valve fire damper body are fixed by bolt connection, which effectively protects the galvanized layer of the regulating valve fire damper body and solves the problem that welding easily burns the galvanized layer of the regulating valve fire damper body, affecting the normal use of the regulating valve fire damper body. However, this patent has the following problems: the fire damper cannot be triggered automatically and needs to be triggered by manually turning the rotating rod. When no one is around and a disaster occurs, the fire damper cannot function. Utility Model Content
[0005] The utility model provides a propped-open fire damper, which solves the problem that the fire damper cannot be triggered automatically and needs to be triggered by manually rotating a rotating rod.
[0006] The technical solution of the utility model is as follows:
[0007] An expansion type fire damper comprises a hollow sleeve and a bracket fixed to the inner wall of the sleeve, wherein the bracket is provided with an expansion mechanism;
[0008] The expansion mechanism comprises an expansion shaft coaxially arranged with the sleeve, one end of the expansion shaft is mounted on the bracket, a plurality of expansion rods are mounted around the axis at the top end of the expansion shaft close to the bracket, expansion leaves are mounted between the expansion rods, the expansion leaves are made of fireproof material, and the expansion leaves can be opened and closed with the opening and closing of the expansion rods;
[0009] The expansion shaft is provided with an automatic expansion device, which includes a movable seat movably sleeved on the expansion shaft at one end away from the bracket, and a tension spring is provided on the movable seat and the end of the expansion shaft close to the bracket, and the tension spring pulls the movable seat to one side of the bracket, and also includes a plurality of driven rods arranged around one end movably connected to the movable seat, and a sleeve that can be slidably sleeved on the expansion rod is provided on the other end of the driven rod, and the sleeve is rotatably connected to the driven rod;
[0010] A temperature-sensitive trigger device is arranged on the side of the spreading shaft away from the bracket, and the temperature-sensitive trigger device fixes the movable seat at room temperature so as not to be moved by the tension spring.
[0011] Furthermore, a mounting base is provided at the connection between the expansion shaft and the bracket, and the mounting base is cylindrical and coaxial with the sleeve.
[0012] Furthermore, the cross section of the sleeve perpendicular to the axis is rectangular.
[0013] Furthermore, when the expansion rods are fully expanded, the plurality of expansion rods are all located on the same cross section perpendicular to the axis of the sleeve, and a limiting protrusion is provided at the rotational connection between the expansion rods and the mounting base to prevent the expansion rods from being over-expanded.
[0014] Furthermore, four spreading rods are provided, which are equidistantly mounted to rotate around the end surface of the mounting seat away from the bracket, and the rotating surface is the surface formed by the mounting position and the axis of the sleeve.
[0015] Furthermore, the expansion leaves are a plurality of metal leaves hinged together, a group of expansion leaves are arranged between two adjacent expansion rods, and the expansion leaves can fill the gap between the two adjacent expansion rods and the tube wall when they are fully expanded.
[0016] Furthermore, the temperature-sensitive trigger device includes a fixing hole arranged at the end of the spreading shaft, a melting plug is arranged in the fixing hole, and the melting plug clamps the movable seat at the end of the spreading shaft.
[0017] Furthermore, threaded holes are arranged around the sleeve, and fixing bolts are screwed into the threaded holes.
[0018] The utility model has the following beneficial effects: in view of the shortcoming that the fire damper can only be triggered manually, the expansion-type fire damper is normally closed at normal temperature by providing a temperature-sensitive trigger device which can be automatically triggered when encountering high temperature. The expansion-type fire damper which is automatically triggered at high temperature is expanded under the action of a tension spring, and can timely block the pipeline passage when encountering a fire. The fire damper is easy to install, has a simple and reliable structure, and is low in cost. It does not require electrical components as a trigger mechanism, thereby ensuring reliability at high temperatures. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall appearance of the utility model;
[0020] Figure 2 This is a schematic diagram of the propping mechanism of the utility model;
[0021] Figure 3 This is a schematic diagram of the propping rod of the utility model;
[0022] Figure 4 This is a schematic diagram of the trigger mechanism of the utility model;
[0023] Figure 5 This is a schematic diagram of the utility model in the open state
[0024] In the above-mentioned drawings:
[0025] The sleeve 1, the bracket 2, the expansion shaft 31, the expansion pages 32, the expansion rods 33, the melting plug 34, the tension spring 35, the mounting seat 41, the limit projection 411, the movable seat 42, the driven rod 51, the sleeve 52, the fixing bolt 12. Specific embodiments
[0026] The following is an illustration based on the drawings and embodiments:
[0027] As Figure 1 shown, a kind of expansion type fire damper includes a hollow sleeve 1. The cross-section of the sleeve 1 perpendicular to the axis is rectangular, and threaded holes are equidistantly arranged around the sleeve 1. A fixing bolt 12 is screwed in the threaded hole for connecting with other pipelines.
[0028] As Figure 1 and Figure 2 shown, it further includes a bracket 2 fixed on the inner walls around the sleeve 1. An expansion mechanism is arranged on the bracket 2;
[0029] As Figure 2 , 3 shown, the expansion mechanism includes an expansion shaft 31 coaxially arranged with the sleeve 1. One end of the expansion shaft 31 is installed on the bracket 2. A plurality of expansion rods 33 are installed around the axis at the top end of the expansion shaft 31 close to the bracket 2. Expansion pages 32 made of fireproof materials are installed between every two of the expansion rods 33. The expansion pages 32 can expand and contract along with the expansion and contraction of the expansion rods 33;
[0030] As Figure 3 , 4As shown, the spreading shaft 31 is provided with an automatic spreading device. The automatic spreading device includes a movable seat 42 movably sleeved on the spreading shaft 31 at the end far from the bracket 2. A tension spring 35 is arranged between the movable seat 42 and the end of the spreading shaft 31 close to the bracket 2. The tension spring 35 pulls the movable seat 42 towards the side of the bracket 2. It further includes four driven rods 51 arranged at equal intervals and circumferentially around and movably connected to one end of the movable seat 42. A sleeve 52 capable of slidingly sleeving on the spreading rod 33 is arranged at the other end of the driven rod 51. The sleeve 52 is rotatably connected to the driven rod 51. Preferably, an installation base is arranged at the connection between the spreading shaft 31 and the bracket 2. The installation base is cylindrical and coaxial with the sleeve 1. Preferably, when the spreading rods 33 are fully spread, several spreading rods 33 are all in the same cross-section perpendicular to the axis of the sleeve 1, and a limiting protrusion 411 for preventing the spreading rods 33 from over-spreading is arranged at the rotational connection between the spreading rods 33 and the installation base. When the spreading page 32 spreads, the limiting protrusion 41 abuts against the hinge of the spreading page 32 to prevent the spreading page 32 from being overly bent when the tension spring is tightened. Preferably, four spreading rods 33 are arranged and are rotatably installed at equal intervals on the end face of the installation seat 41 far from the bracket 2. The rotational surface is the surface formed by the installation position and the axis of the sleeve 1. Preferably, the spreading page 32 is composed of several metal leaflets hinged together. A group of spreading pages 32 is arranged between two adjacent spreading rods 33. After the spreading pages 32 are fully spread, the gaps between the two adjacent spreading rods 33 and the pipe wall can be filled.
[0031] As Figure 3 and Figure 4 shown, a thermosensitive triggering device that is only triggered at high temperatures is arranged on the side of the spreading shaft 31 far from the bracket 2. The thermosensitive triggering device fixes the movable seat 42 at normal temperature. Preferably, the thermosensitive triggering device includes a fixing hole arranged at the end of the spreading shaft 31. A melting plug 34 is arranged in the fixing hole. The melting plug is made of an easily fusible alloy, and the melting point can be between 140 degrees Celsius and 170 degrees Celsius. The temperature of fire smoke is generally between 600 - 800 degrees. Therefore, this device is easily triggered when a disaster occurs. The melting plug 34 clamps the movable seat 42 at the end of the spreading shaft 31.
[0032] The principle and usage method of this device are as follows:
[0033] Before installing this expandable fire damper, first confirm that the installed valve is in an untriggered state. Sleeve the sleeve 1 on the preset exhaust duct. After a disaster occurs, the fire damper will not close immediately and will continue to allow air to flow. Once the fire spreads to the fire damper in the duct, the high temperature brought by the fire will melt the melting plug 34 of this expandable fire damper. The movable seat 42 fixed before the plug is pulled towards the mounting seat 41 under the action of the tension spring 35. The movable seat 42 drives the driven rod 51 to move. The sleeve 52 provided on the driven rod 51 drives the expansion rod 33 to expand. The expansion of the expansion rod 33 will drive the expansion page 32 hinged on the expansion rod 33. As Figure 5 shown, after the expansion page 32 expands, it can close the duct and play the role of blocking the spread of fire.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.
Claims
1. A propeller-type fire damper, characterized in that: It includes a hollow sleeve (1), and also includes a bracket (2) fixed to the inner wall of the sleeve (1), and a spreading mechanism is arranged on the bracket (2). The spreading mechanism includes a spreading shaft (31) arranged coaxially with the sleeve (1). One end of the spreading shaft (31) is installed on the bracket (2). A number of spreading rods (33) are installed around the axis at one end of the spreading shaft (31) close to the bracket (2). A spreading page (32) is installed between every two of the spreading rods (33). The spreading page (32) is made of fireproof material, and the spreading page (32) can open and close along with the opening and closing of the spreading rods (33). An automatic spreading device is arranged on the spreading shaft (31). The automatic spreading device includes a movable seat (42) movably sleeved at one end of the spreading shaft (31) far from the bracket (2). A tension spring (35) is arranged between the movable seat (42) and one end of the spreading shaft (31) close to the bracket (2). The tension spring (35) pulls the movable seat (42) towards the side of the bracket (2). It also includes a number of circumferentially arranged driven rods (51) with one end movably connected to the movable seat (42). A sleeve (52) capable of sliding and sleeving on the spreading rod (33) is arranged at the other end of the driven rod (51). The sleeve (52) is rotatably connected to the driven rod (51). A temperature-sensitive triggering device is arranged on the side of the spreading shaft (31) far from the bracket (2). The temperature-sensitive triggering device fixes the movable seat (42) at normal temperature and does not allow it to be moved by the tension spring (35).
2. The expanding type fire damper according to claim 1, characterized in that: An installation seat (41) is arranged at the connection between the spreading shaft (31) and the bracket (2). The installation seat (41) is cylindrical and coaxial with the sleeve (1).
3. A spread-type fire damper according to claim 1, characterized in that: The cross-section of the sleeve (1) perpendicular to the axis is rectangular.
4. The expandable fire damper according to claim 2, wherein: When the spreading rods (33) are fully spread, a number of spreading rods (33) are all in the same cross-section perpendicular to the axis of the sleeve (1), and a limit protrusion (411) for preventing the spreading rods (33) from being overspread is arranged at the rotating connection of the spreading rods (33) and the installation base.
5. The expandable fire damper according to claim 4, wherein: Four spreading rods (33) are arranged, and are rotatably installed equidistantly and circumferentially on the end face of the installation seat (41) far from the bracket (2).
6. The expandable fire damper according to claim 5, wherein: The spreading page (32) is a number of metal leaflets hinged together. A group of spreading pages (32) is arranged between every two adjacent spreading rods (33), and after the spreading pages (32) are fully spread, the gaps between the two adjacent spreading rods (33) and the pipe wall can be filled.
7. The expandable fire damper according to claim 1, wherein: The temperature-sensitive triggering device includes a fixing hole arranged at the end of the spreading shaft (31). A melting plug (34) is arranged in the fixing hole. The melting plug (34) locks the movable seat (42) at the end of the spreading shaft (31).
8. A spread-type fire damper according to claim 1, characterized in that: Threaded holes are arranged around the sleeve (1), and fixing bolts are screwed in the threaded holes.