World patent pipe rupture valve
With Our unique pipe rupture valve It´s possible to prevent oil leakage in the environment. With a modest investment we can reach a large benefit for the environment and at the same time prevent serious or deadly accidents.
Generally about pipe rupture valves:
The use of pressurized fluids in systems for operating machinery, equipment or the like has been known in a very wide variety of devices and procedures. For example, hydraulic oil is used as a pressurized fluid in many areas and in a very large number of different applications. One such typical application consists of machinery such as wheel loaders, backhoe loaders, tractors and other various types of machines. The problem with machines that utilize systems that can include pressurizes fluid is that leakage in their systems regularly occur. An example of such leakage is a hose rupture or a leak in the hoses. When a hose springs a leak, pressure in the pressurizes system can suddenly diminish significantly or even completely cease. Hydraulic lifting or loading devices may, because of leakage loose their working pressure resulting in a rapid lowering of their load. This may in serious incidents lead to accidents involving damage to equipment and injury to people. In worst cases, fatalities have been caused by hose ruptures.
Furthermore, leakage of hydraulic fluids may cause environmental problems and extensive clean-up work. Significant environmental benefits can be achieved if the amount of oil that leaks out from a ruptured hose can be limited.
In order to reduce the risk of injury from for example leaking hoses, valves that prevent back flow of fluid from an after the valva existing pressurized hose are previously known. Such a valve consists for example of hose rupture valves. Hose rupture valves are designed so that they prevent flow of remaining fluid under pressure in the system after the valve. Hose rupture valves indicate both breaches in the hose and usually even a number of shortcomings. One of these is that they usually are costly to manufacture.
Another problem with existing hose rupture valves is that they react only after a certain time lag. Thus shut-off does not immediatly occur when the hose ruptures. This can for example lead to a load, lifted with some type of hydraulic lift, being lowered a certain height before the hose rupture valve is triggered. This delayed reaction can in many cases cause damage to the equipment and at worst cause death to humans in the vicinity.
A further problem with existing designs is that their function depends on the viscosity and flow of the pressurized fluid. This creates problems associated with cold weather when the oil is more viscous than at warmer temperatures. If the design is adjusted according to the conditions that exist at cold temperatures, the function of the valve at warmer temperatures can be significantly impaired. Similarly, the valve´s function can be significantly impaired by cold temperatures if it has been adjusted for warmer temperatures.
A yet further problem with present designs is that EU has issued a directive for a new standard of hose rupture valves for vehicles. A large number of known designs do not meet the requirements of the new standard.
Certain types of for example electrically controlled systems are designed to detect hose failure or other types of leakage in hydraulic systems and can be turned off in certain circumstances, such as during hose rupture or similar.
The connection of known types of hose rupture valves into existing systems results in further problems because the oscillation dampening function for vehicles and other applications may cease to operate. The removal of the oscillation dampening function can result in bring about accidents.
A more specifik problem arises in situations where a lifting device includes two hydraulic cylinders that control a bucket for heavy equipment or the like. If teh hose rupture valve is not triggered reliably one of the cylinders may have to handle the entire load.
News letter about Our pipe rupture valve:
Together with a Forest Company and a Machine manufacturer we have developed an application for harvesters. In the end of February we are mounting the first valve on a forest harvester owned by Sveaskog. This cooperation is for to stop oil leakage in the environment. It is now very expensive to leak out oil in the forest. Costs for oil and extensiv clean-up work .
2012-03-06 we mounted the pipe rupture valve on a forest harvester. We haven´t had any problems at all. All functions in the harvester is working normally.
The valve will be designed both for serial production and for mounting on existing machines.
Characteristics and applications:
The function of the valve is built on difference in pressure before and after the valve. When a hose rupture the valve shut down immediately. The function is totally mechanical and it is insensible for possible contamination in the system.
The valve is always open. Full oscillation dampening function
Independent of flow and viscosity
Flow and pressure can be measured to fit all applications
The valve can be supplied with a pressure transmitter to turn off direction valve, pump, indicate the rupture
Pipe rupture valves:
Technical specifikations:
| Type: | 11-17-A-18 |
| Dimension mm: | 160x160x70 |
| Weight: | appr 14 kg |
| Connection: | A&B:R 11/4″ |
| Measured max pressure: | 320 bar |
| Closing pressure: | <40 bar (adjustable) |
| Flow rate Q max: | 350 l/min |
| Cracking pressure at 30 l/min | 4,5 bar at 46 cst |
| By pass valve | |
| Voltage: | 24 V DC |
| Max pressure: | 350 bar |
| Cracking pressure at 30 l/min: | 15 bar at 46 cst |
Technical specifikation:
| Type: | 11-12-B-14 |
| Dimension mm: | 105x95x50 |
| Weight: | appr 1,4 kg |
| Connection: | A&B:R 3/4″ |
| Measured pressure: | 250 bar |
| Closing pressure: | <50 bar (adjustable) |
| Flow rate Q max: | 70 l/min |
| Cracking pressure at 105 l/min: | 12 bar at 46 cst |
Technical specifikation:
| Type: | 11-12-A-14 |
| Dimension mm: | 95x85x40 |
| Weight: | appr 1 kg |
| Connection: | A&B:R 3/8″ |
| Measured max pressure: | 250 bar |
| Closing pressure: | <50 bar (adjustable) |
| Flow rate Q max: | 60 l/min |
| Cracking pressure at 50 l/min: | 12 bar at 46 cst |
