Lance for a gas analysis system

A gas sampling lance comprising

• a gas sample pipe system for sampling gases, wherein the gas sample pipe system comprises a lance pipe for protruding into a space from which the gas has to be sampled and a connecting pipe for connecting the lance pipe to a gas scrubber,
• a first scraper to clean the inside of the lance pipe, and
• a second scraper to clean the inside of the connecting pipe,
• wherein the lance pipe and the connecting pipe are configured at an angle to each other;
• wherein the respective scrapers are mounted in line with respectively the lance pipe and the connecting pipe;
• wherein the lance pipe, the connecting pipe, the first scraper and the second scraper are connected to a connecting block, where the connecting block has a first pair of opposed faces and a second pair of opposed faces,
• wherein the lance pipe is connected to one face of the first pair of faces and the first scraper is connected to the other face of the first pair of faces at a point of entry into the connecting block for the first scraper,
• wherein the connecting pipe is connected to one face of the second pair of opposed faces and the second scraper is connected to the other face of the second pair of opposed faces at a point of entry into the connecting block for the second scraper;
• wherein the lance pipe and the connecting pipe connect to the connecting block such that channels provided in the connecting block are in line with the lance pipe and the connecting pipe and provide a passageway between the lance pipe and the connecting pipe for passage of sampled gas from the lance pipe to the connecting pipe, wherein these channels with the lance pipe and connecting pipe form together the gas sample pipe system;
• wherein portions of the channels in the connecting block respectively extend, beyond the passageway between the lance pipe and connecting pipe, through the connecting block to the faces of the connecting block to form the respective points of entry for the first scraper and the second scraper;
• wherein the connecting block has a block shape wherein the first pair of opposed faces connect to and are perpendicular to the second pair of opposed faces;
• wherein the lance pipe and the connecting pipe are positioned such that center lines of the lance pipe and the connecting pipe intersect;
• wherein the respective scrapers are mounted in line with respectively the lance pipe and the connecting pipe, and
• wherein the portions of the channels in the connecting block have respective outer ends and widen at their respective outer ends to form respective first and second recesses where the first scraper and the second scraper are connected to the connecting block, and the first scraper is mounted in line with the first recess and the second scraper is respectively mounted in line with the second recess.