GB2514783A

GB2514783A - Over pressure venting system

Info

Publication number: GB2514783A
Application number: GB201309885A
Authority: GB
Inventors: Matthew Molloy
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-03
Filing date: 2013-06-03
Publication date: 2014-12-10
Also published as: GB201309885D0

Abstract

An over pressure venting system is suitable to be mounted in the wall or roof of a building that may be subject to over pressure events. The system includes a uPVC frame 2 fixed in the wall or roof and a vent panel 1 fixed on two externally mounted hinges 3, which are in turn fixed to the external face of the frame section. The panel is normally held in its closed position using a spring-loaded ball catch that has been calibrated to release at a preset pressure. The ball catch is optionally a twin ball catch 5. The system may also have a spring operated closing restrictor 17 located on the lower edge of the panel which stops the panel from closing fully immediately after an overpressure event. Preferably, a rubber seal 6 is provided. A panel restrictor may be used to limit the angular travel of the vent.

Description

DESCRIPTION

Over Pressure Venting System This invention relates to pressure venting systems to be mounted in the walls or roofs of buildings both permanent and temporary in nature which may be subject to over pressure events such as gas venting, explosion and various other conditions that may cause a dangerous rise in pressure within a building. In many industrial buildings there is a high risk of this type of incident which may cause substantial damage or injury if the pressure is not allowed to be relieved rapidly it is therefore convention to install some form of pressure relief system.

Pressure venting systems are generally Metal bursting panels which are retained by shear bolts which are fixed to an outer steel frame, the bolts shear at the required pressure resulting in the panel being replaced after a pressurization event or the disc ruptures and needs to be unbolted and replaced, another is a hinged metal panel within a bolted steel framework, the panel is fixed by a magnet or burst tabs which release at a specific pressure. The existing systems have a myriad of components providing many potential failure and access points, the current frame and panel weights can be excessive depending on the size of panel required and make installation difficult and in some cases impossible depending on the orientation of the building in relation to its surroundings.

The present invention provides an improved pressure venting system, in the present pressure venting system the frame and panel are manufactured from uPVC providing a lightweight system with reduced number of components, the vent panel fixed on two externally mounted hinges which are in turn fixed to the external face of the frame section. The panel is re-closable after an overpressure event without replacement of parts.

The frame will have where required a security/shrapnel grille fixed directly to its internal face to restrict entry when the panel is in an open position and also to reduce possible shrapnel dispersal through the opening during an over pressure event.

There is at least one panel opening restrictor attached to the internal surface of the frame and directly to the surface of the panel which restrict the panel from pivoting past 100 degrees during an over pressure event.

There is at least one spring operated closing restrictor located on the lower edge of the panel which stops the panel from closing fully immediately after an overpressure event.

The panel will open under a predetermined pressure and will be held in its closed position using a spring adjustable twin ball catch that has been calibrated to release at the predetermined pressure.

Figure 1 is a perspective view of the over pressure venting system.

Figure 2 is a vertical section view on line 2-2 of the over pressure venting system shown in Figure 1.

Figure 3 is a diagrammatical drawing similar to Figure 2 also showing a panel opening restrictor.

Figure 4 is a view of the upper portion of Figure 3 showing the panel opening restrictor and also the security/shrapnel grille.

Figure 5 is a view of the lower portion of Figure 3 showing the security/shrapnel grille and the twin ball catch.

Figure 1 is a perspective view of the over pressure venting system which is mounted in either the wall or roof of buildings both temporary and permanent, over pressure venting systems made up of the frame sections 2 and panel sections 1.

Figure 2 is a vertical section through an over pressure venting system, the system includes a frame 2 which is made from upvc and is formed as a single element with no bolted or mechanically fixed corner joints, frame 2 is fixed into the wall or roof of the building using eight hilti wall or steel fixings depending on building construction which are indicated as 11.

The panel section 1 is fixed to the frame 2 using two hinges 3 which are attached to the external surface of the frame 2 and the panel land allow the panel to hinge outwards. The orientation of the hinges 3 can be on any side of the panel allowing it to open outwards in either an upward, downward or sideways direction depending on the location of the building.

There is a rubber seal 6 located on the four sides external face of the frame 2 which when the panel 1 is in its closed position seals against the internal surface of the panel 1, there is a rubber seal 7 located on the four sides of the internal face of the panel 1 which when the panel 1 is in its closed position seals against the external face of the frame 2.

The panel 1 is made from upvc and is formed as two elements, an outer element 17 and a central element 4 with no bolted or mechanically fixed corner joints, the central element is held in place using four upvc fixing sections 13.

The panel is held in a closed position by a commercially available spring adjustable twin ball catch 5 and the catch pin 16, the springs are provided preset to the required pressure, the catch pin 16 is fixed to the panel using two upvc fixings 9, the spring adjustable twin ball catch 5 is mounted using two stainless steel bolts 10 to a mounting plate 12, the mounting plate 12 is fixed to the frame 2 using four upvc fixings 8.

Two spring loaded closing restrictors 17 are fixed to the recessed edge of the frame 2 and are released when the panel 1 is moved during an over pressure event, the closing restrictors stop the panel from closing fully and must be reset manually to allow the panel ito move back to a fully closed position, the restrictors 17 are fixed to the frame using two upvc fixings 8.

Figure 3 is essentially the same as figure 2 and has been shown to demonstrate the position of the position of the spring loaded closing restrictors 17 having operated as a result of panel 1 movement during an over pressure event and the two opening restrictors 14 that will stop the panel from opening past 110 degrees.

Figures 4 and 5 are intended as a close up view only of the upper and lower sections of figure 3.

The description above is the preferred embodiment of the invention but modifications may be possible within the scope of the invention.

Claims

Claims 1. Over Pressure Venting system comprising: A pressure venting system to be mounted in the outer wall or roof of a temporary or permanent building, said system will open at a predetermined pressure generated from an over pressure event taking place inside said building, said system comprising: a uPVC frame fixed in said outer wall or said roof, a panel which will remain normally in a closed position but which will pivot on two hinges connecting said panel to said frame on any of the available external sides depending on orientation required allowing said panel to open when a pressure is applied internally in said building which is at or above the predetermined pressure, said over pressure venting system having a two part spring adjusted ball catch mechanism which has been pre-set to a predetermined pressure which holds said panel in place until such time as the pressure internal to said building reaches the predetermined pressure.
2. Over Pressure Venting system as set forth in claim 1. wherin the closing mechanism is a two part unit with a ball receiver mounted on said panel and a spring adjusted ball catch mechanism which has been pre-set to the predetermined pressure mounted on said frame using a mounting plate which will release when the internal pressure in said building reaches a predetermined pressure.
3. Over Pressure Venting system as set forth in any of the preceding claims wherin said panel is constructed to withstand repeated over pressure incidents.
4. Over Pressure Venting system as set forth in any of the preceding claims wherin said panel and said frame each have individually attached in an extruded channel around the extremity of each in an inwardly facing direction a sealing rubber which seals against the others contact surface while the panel is in a closed position.
5. Over Pressure Venting system as set forth in any of the preceding claims wherin said panel has at least one nylon panel restrictor attached to said frame which restrict the panel from pivoting past 100 degrees during an over pressure event.
6. Over Pressure Venting system as set forth in any of the preceding claims wherin a pivoting system is created when said panel in connected directly to said frame using two independent hinge units.
7. Over Pressure Venting system as set forth in any of the preceding claims wherin a spring loaded closing restrictor is fixed to said frame so that on opening of said panel as a result of an overpressure event said closing restrictor releases and in doing so does not allow said panel to re close fully ensuring an airflow exists until such time as the over pressure venting system is manually reset.
8. Over Pressure Venting system as set forth in any of the preceding claims wherin a mesh screen is secured to the internal facing surface of said frame to create a security/shrapnel screen face to restrict entry when the panel is in an open position and also to reduce possible shrapnel dispersal through the opening during an over pressure event.
9. Over Pressure Venting system as set forth in any of the preceding claims wherin a mesh frame is secured to the wall or roof external to the system to create a security/shrapnel screen to restrict entry when the panel is in an open position and also to reduce possible shrapnel dispersal through the opening during an over pressure event.