Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 68 users online :: 5 registered, 0 hidden and 63 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

BL-520 Fuel metering device

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

BL-520 Fuel metering device

Unread postAuthor: rikukiakuchiki777 » Tue May 05, 2009 11:46 pm

Is anyone able to explain how the metering device found on the BL-520 works? (http://ultimatespudgun.com/product_info.php?cPath=42&products_id=178) There is a brief explanation located at the above link, however it is quite vague. Any diagrams would be nice, they make everything so much easier :wink:. I am curious about the one-way safety valve they talk about; "when the action is pushed forward the metered gas is injected into the chamber of your spudgun through a one way safety valve". How does this work? does the pressure of the gas fuel allow the safety valve to open, releasing the fuel into the chamber?
  • 0

User avatar
rikukiakuchiki777
Staff Sergeant
Staff Sergeant
 
Posts: 110
Joined: Wed Feb 11, 2009 1:00 am
Location: Australia
Reputation: 0

Unread postAuthor: inonickname » Wed May 06, 2009 12:42 am

There are two check valves I believe- propane or mapp flows through a check valve on the upstroke of the pump, allowing pressure to equalize between bottle and pump. When the pump is pushed down high pressure causes that valve to close.

Then I'm unsure on how it's delivered to the chamber- a higher pressure check valve, or a valve that is depressed by the pump stroke.
  • 0

PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
User avatar
inonickname
Lieutenant General
Lieutenant General
 
Posts: 2606
Joined: Sun Dec 07, 2008 3:27 am
Reputation: 0

Unread postAuthor: Technician1002 » Wed May 06, 2009 1:01 am

inonickname wrote:There are two check valves I believe- propane or mapp flows through a check valve on the upstroke of the pump, allowing pressure to equalize between bottle and pump. When the pump is pushed down high pressure causes that valve to close.

Then I'm unsure on how it's delivered to the chamber- a higher pressure check valve, or a valve that is depressed by the pump stroke.


I have my doubts it's a pump even though it looks like one. Watch him operate it. It uses a short stroke. I'm thinking it's a spool valve with metering chamber in the middle. The safety is just a check valve in my opinion so the chamber pressure surge doesn't launch the valve core.

I'm pretty sure by the video that this is simply a custom version of the standard metering tube and 2 ball valve system, but using a spool valve setup on a common rod.

Edit Added quick cheezy paint sketch. O ring seals not shown. One push vents the space to the chamber through a check valve not shown and the other way seals off the chamber and opens the meter to the propane pressure. This is how I think it works.

Edit Checked the specs on the meter. It is a metered volume regulated by pressure just like any regulated metering volume / valve setup.
  • 0

Attachments
Meter.png
Possible fuel meter layout
Meter.png (8.28 KiB) Viewed 1982 times
User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: inonickname » Wed May 06, 2009 1:30 am

I hadn't though of that, though in thinking about it you are completely correct. The balanced nature of it also explains there being no noticeable resistance.
  • 0

PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
User avatar
inonickname
Lieutenant General
Lieutenant General
 
Posts: 2606
Joined: Sun Dec 07, 2008 3:27 am
Reputation: 0

Unread postAuthor: jagerbond » Wed May 06, 2009 2:56 am

Technician1002 is correct, simple and effective. The one-way keeps pressure/combustion from back tracking and keeps the pipeline mixture consistent for repeated precise meterings. The diagram was an early mock up.

Mike
Sureshot Inc. / http://www.ultimatespudgun.com
  • 0

Attachments
PropaneMeteringProtoypeDesign2.jpg
User avatar
jagerbond
1st Lieutenant
1st Lieutenant
 
Posts: 286
Joined: Tue Jul 29, 2008 5:33 am
Location: Hawaii
Reputation: 0

Unread postAuthor: rikukiakuchiki777 » Wed May 06, 2009 3:07 am

Whoa, that is so much simpler than I expected, and i can't believe i even got a response the same day as posting. Thanks so much guys!
  • 0

User avatar
rikukiakuchiki777
Staff Sergeant
Staff Sergeant
 
Posts: 110
Joined: Wed Feb 11, 2009 1:00 am
Location: Australia
Reputation: 0

Unread postAuthor: FeLeX » Tue Nov 24, 2009 2:27 am

How does this work without having a pressure guage??
  • 0

I have a signature. In Russia signature has you.
User avatar
FeLeX
Captain
Captain
 
Posts: 310
Joined: Sat Mar 10, 2007 10:45 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: CS » Tue Nov 24, 2009 2:44 am

Image

Pressure gauge and a regulator. *spoonfeed*
  • 0

User avatar
CS
Donating Moderator
Donating Moderator
 
Posts: 1897
Joined: Fri Feb 18, 2005 5:32 pm
Location: Southern Utah
Country: United States (us)
Reputation: 4

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'