Slow closing mechanism for flap type fire damper
By designing a slow-closing mechanism for the flip-type fire valve, the circular motion damping restriction function is achieved by using the damper, which solves the problem of airflow disturbance when the flip-type fire valve is quickly closed, and prevents the system equipment from jumping and stopping.
Patent Information
- Application Number
- CN202420866489.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-04-24
AI Technical Summary
The airflow disturbance caused by the flip-type fire valve when it is closed quickly causes the downstream auxiliary check valve to flash at the limit, which in turn causes the system equipment to jump and stop.
A slow-closing mechanism is designed, including the first and second dampers and an adjusting rope, which is attached to the handle of the flip-shaped fire valve through the adjustment rope, and the circular motion damping restriction function is realized through the damper to slow down the speed of the valve switch.
It effectively slows down the airflow disturbance caused by the flip-type fire valve when opening and closing, prevents the downstream auxiliary check valve from opening and flashing due to airflow disturbance, and prevents the system equipment from jumping and stopping.
Smart Images
Figure CN222702719U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nuclear power, in particular to a slow closing mechanism for a flap type fire damper. Background Art
[0002] The original flap-type valve was designed to be opened and closed manually. However, due to the valve design, the fusible piece would melt in the event of a fire, causing the valve handle pin to disengage and instantly close under the action of the torque spring force. Since the valve is a flap-type large-diameter butterfly valve, the instantaneous closing force is large, causing the blades to stir the airflow, which would cause a downstream assisted-opening check valve to flash at the opening limit, and then cause the system equipment to trip due to logical relationships. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a slow closing mechanism for a flap type fire damper.
[0004] The technical solution adopted by the utility model to solve the technical problem is: construct a slow closing mechanism for a flap-type fire damper, comprising a first damper, a second damper and an adjusting rope, wherein the first damper is provided with a first connecting portion and a second connecting portion at both ends in the length direction, and the second damper is provided with a third connecting portion and a fourth connecting portion at both ends in the length direction;
[0005] The adjustment rope is connected to the first connection part, and the adjustment rope is used to be hung together with the handle of the flap-type fire damper; the second connection part is rotatably connected to the third connection part, and the fourth connection part is rotatably connected to the wall of the mounting frame.
[0006] In some embodiments, the adjustment rope is a steel wire rope.
[0007] In some embodiments, the second connecting portion is rotatably connected to the third connecting portion via a pin.
[0008] In some embodiments, a second pin hole is provided on the second connection portion, a third pin hole is provided on the third connection portion, and the second pin hole is rotatably connected to the third pin hole via the pin shaft.
[0009] In some embodiments, the slow closing mechanism for the flap-type fire damper further comprises a bracket connected to the wall surface of the mounting frame;
[0010] The fourth connecting portion is rotatably connected to the bracket.
[0011] In some embodiments, the bracket is L-shaped, and the bracket includes a fixing plate and a connecting plate vertically connected to the fixing plate;
[0012] The fourth connecting portion is rotatably connected to the connecting plate.
[0013] In some embodiments, the fourth connecting portion is rotatably connected to the connecting plate via a pin.
[0014] In some embodiments, the stent is a metal stent.
[0015] In some embodiments, the first damper is a liquid damper.
[0016] In some embodiments, the second damper is a liquid damper.
[0017] The implementation of the utility model has the following beneficial effects: the slow closing mechanism for the flap-type fire damper includes a first damper, a second damper and an adjustment rope, the first damper is provided with a first connection part and a second connection part at both ends in the length direction, and the second damper is provided with a third connection part and a fourth connection part at both ends in the length direction; the adjustment rope is connected to the first connection part, and the adjustment rope is used to be hung with the handle of the flap-type fire damper; the second connection part is rotatably connected to the third connection part, and the fourth connection part is rotatably connected to the wall of the mounting frame. It can realize the damping and limiting function of the circular motion of the actuator of the flap-type fire damper, and reduce the airflow disturbance caused by the valve opening and closing too quickly when the personnel open and close the valve, which affects the operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:
[0019] Figure 1 It is a schematic diagram of the application of a slow closing mechanism for a flap-type fire damper in some embodiments of the utility model. DETAILED DESCRIPTION
[0020] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.
[0021] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.
[0022] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.
[0023] See also Figure 1 The utility model shows a slow-closing mechanism for a flap-type fire damper, which can solve the airflow disturbance caused by the rapid closing of the flap-type fire damper 100 when it is closed, and can reduce and slow down the natural closing speed of the flap-type fire damper 100 so that it can reach a uniform speed state as much as possible, thereby reducing the airflow disturbance caused to the system, avoiding the opening limit flash of the auxiliary opening check valve downstream of the flap-type fire damper 100, and preventing the system equipment from tripping.
[0024] The utility model comprises a first damper 10, a second damper 20 and an adjusting rope 30, wherein the first damper 10 is provided with a first connecting portion 11 and a second connecting portion 12 at both ends in the length direction, and the second damper 20 is provided with a third connecting portion 21 and a fourth connecting portion 22 at both ends in the length direction.
[0025] The adjustment rope 30 is connected to the first connection part 11, and is used to be hung together with the handle 101 of the flap type fire damper 100; the second connection part 12 is rotatably connected to the third connection part 21, and the fourth connection part 22 is rotatably connected to the wall of the mounting frame 200.
[0026] In some embodiments, the adjustment rope 30 is a steel wire rope, and the length of the adjustment rope 30 can be adjusted by an adjustment buckle, and can be applied to handles 101 of different sizes and structures. It can be understood that by arranging a flexible adjustable steel wire rope at one end of the first connection part 11 of the first damper 10, and the flexible adjustable steel wire rope is connected with the handle 101, the handle 101 can smoothly move in the circular motion of opening and closing the sub-rudder without being affected by the locking of the adjustment rope 30, and the instant disassembly function when the first damper 10 does not need to intervene can be satisfied. Further, the first connection part 11 can be provided with a first pin hole, and the adjustment rope 30 can be connected to the first pin hole, for example, the adjustment rope 30 can be directly connected to the first pin hole, or the first pin hole can be provided with a fastener, and the adjustment rope 30 is connected to the fastener, and the fastener can be a bolt, a screw or a pin.
[0027] In some embodiments, the second connection part 12 is rotatably connected to the third connection part 21 via a pin shaft 40. Preferably, a second pin hole is provided on the second connection part 12, and a third pin hole is provided on the third connection part 21, and the second pin hole and the third pin hole are rotatably connected via the pin shaft 40.
[0028] It can be understood that a pin 40 is used at the connection between the first damper 10 and the second damper 20, and a bionic knee joint structure is used to smoothly realize that when the flap-type fire damper is opened and closed, the first damper 10 and the second damper 20 can be freely rotated at the connection between the two to cooperate with the action of the flap-type fire damper.
[0029] In some embodiments, the slow closing mechanism for the flap-type fire damper further comprises a bracket 50 connected to the wall of the mounting frame 200; the fourth connecting portion 22 is rotatably connected to the bracket 50. The mounting frame 200 is arranged beside the flap-type fire damper 100, and in some embodiments, the mounting frame 200 can also be defined as a rooting bracket. The mounting frame 200 can be a metal frame. The mounting point of the fourth connecting portion 22 is roughly on the side wall of the mounting frame 200 located above the flap-type fire damper 100 and on the same side as the handle 101.
[0030] In some embodiments, the bracket 50 is L-shaped, and includes a fixing plate 51 and a connecting plate 52 vertically connected to the fixing plate 51, and the connecting plate 52 is arranged on the same side as the handle 101. The fixing plate 51 can be detachably connected to the mounting frame 200 by bolts or screws. The bracket 50 is a metal bracket, for example, a stainless steel bracket, an aluminum bracket or an aluminum alloy bracket.
[0031] The fourth connecting portion 22 is rotatably connected to the connecting plate 52 .
[0032] In some embodiments, the fourth connection portion 22 is rotatably connected to the connection plate 52 via a pin 60. For example, a fourth pin hole may be provided on the fourth connection portion 22, and the pin 60 is passed through the fourth pin hole and connected to the connection plate 52. On the basis of a stable installation, the fourth connection portion 22 can be freely rotated at a free angle accompanying the opening and closing of the flap-type fire damper 100.
[0033] In some embodiments, the first damper 10 is a liquid damper.
[0034] In some embodiments, the second damper 20 is a liquid damper.
[0035] The damper can generally alleviate the load caused by the instantaneous violent displacement of the pipe system caused by special working conditions such as earthquakes or other vibrations. The main principle is to use the basic damping orifice plate oil valve of the damper. The damper is a vibration control device that is sensitive to speed. This application mainly uses the sensitivity of the damper to speed.
[0036] In a nuclear power plant, the actuator of the flap-type fire damper 100 on site is designed to operate in a 90° circle from opening to closing. Unlike the linear operation of conventional contact dampers, lateral shearing can easily lead to shear force damage to the damper. Therefore, the present application configures a first damper 10 and a second damper 20 to solve the problem of shear force damage to the damper during non-linear operation.
[0037] When a fire occurs or when it is manually closed, the flap-type fire damper 100 on site is instantly closed by the spring force torque. The design purpose is to achieve a passive closing function. However, the instantaneous closing of the torque force will cause the fire damper structure (butterfly plate design) to instantly generate a large fanning airflow, thereby causing the light-weight auxiliary opening check valve to close due to airflow disturbance. By configuring the flap-type fire damper 100 with the slow closing mechanism for the flap-type fire damper, the circular motion damping limiting function of the actuator of the flap-type fire damper 100 is successfully realized on the basis of satisfying the design principle of not affecting the basic switching function of the flap-type fire damper 100, which reduces the airflow disturbance caused by the valve opening and closing too quickly when the personnel open and close the valve and affect the system operation.
[0038] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.
Claims
1. A slow closing mechanism for a flap-type fire damper, characterized in that: The invention comprises a first damper (10), a second damper (20) and an adjusting rope (30), wherein the first damper (10) is provided with a first connecting portion (11) and a second connecting portion (12) at two ends in the length direction, and the second damper (20) is provided with a third connecting portion (21) and a fourth connecting portion (22) at two ends in the length direction. The adjusting rope (30) is connected to the first connecting portion (11), and the adjusting rope (30) is used to be hung together with the handle (101) of the flap-type fire damper (100); the second connecting portion (12) is rotatably connected to the third connecting portion (21), and the fourth connecting portion (22) is rotatably connected to the wall surface of the mounting frame (200).
2. The slow closing mechanism for flap-type fire damper according to claim 1, characterized in that: The adjusting rope (30) is a steel wire rope.
3. The slow closing mechanism for flap-type fire damper according to claim 1, characterized in that: The second connecting portion (12) is rotatably connected to the third connecting portion (21) via a pin shaft (40).
4. The slow closing mechanism for flap-type fire damper according to claim 3, characterized in that: The second connecting portion (12) is provided with a second pin hole, the third connecting portion (21) is provided with a third pin hole, and the second pin hole and the third pin hole are rotatably connected via the pin shaft (40).
5. The slow closing mechanism for flap-type fire damper according to claim 1, characterized in that: The slow closing mechanism for the flap-type fire damper further comprises a bracket (50) connected to the wall surface of the mounting frame (200); The fourth connecting portion (22) is rotatably connected to the bracket (50).
6. The slow closing mechanism for flap-type fire damper according to claim 5, characterized in that: The bracket (50) is L-shaped, and comprises a fixing plate (51) and a connecting plate (52) vertically connected to the fixing plate (51); The fourth connecting portion (22) is rotatably connected to the connecting plate (52).
7. The slow closing mechanism for flap-type fire damper according to claim 6, characterized in that: The fourth connecting portion (22) is rotatably connected to the connecting plate (52) via a pin (60).
8. The slow closing mechanism for flap-type fire damper according to claim 6, characterized in that: The bracket (50) is a metal bracket.
9. The slow closing mechanism for a flap-type fire damper according to any one of claims 1 to 8, characterized in that: The first damper (10) is a liquid damper.
10. The slow closing mechanism for a flap-type fire damper according to any one of claims 1 to 8, characterized in that: The second damper (20) is a liquid damper.