Arrangement for moving measuring head of measuring device into and out of process space
An arrangement for moving a measuring head of a measuring device into and out of a process space. The arrangement includes a valve member that is attached to a wall of the process space. A measuring device is attached to the valve member and includes a body part provided with an elongated portion which in turn has a measuring head at one end. The measurement device also includes a placement device arranged to seize the measuring device and to move it through the valve member into a first position in which the measuring head extends into the process space and, correspondingly, into a second position in which the measuring head is not in contact with the process space. The placement device includes a stop element configured to seize the measuring device and to form a sealed casing around the body part of the measuring device, and a housing part arranged to attach to the valve member and to form a sealed casing around the stop element. The placement device is equipped with features that move the stop element seizing the body part of the measuring device inside the housing part so that the measuring device moves between the first position and the second position.
1. An arrangement for moving a measuring head of a measuring device into and out of a process space, the arrangement comprising: a valve member to be attached to a wall of the process space; the measuring device to be attached to the valve member, the measuring device comprising a body part provided with an elongated portion which in turn has a measuring head at one end thereof; and a placement device arranged to seize the measuring device and to move it through the valve member into a first position in which the measuring head extends into the process space and, correspondingly, into a second position in which the measuring head is not in contact with the process space, wherein the placement device comprises a stop element configured to seize the measuring device and to form a sealed casing around the body part of the measuring device, and a housing part arranged to attach to the valve member and to form a sealed casing around the stop element, and in that the placement device is equipped with means for moving the stop element seizing the body part of the measuring device inside the housing part in such a manner that the measuring device moves between the first position and the second position.
2. The arrangement according to claim 1 , wherein the stop element and the housing part are formed of casing parts arranged co-axially one inside the other.
3. The arrangement according to claim 2 , wherein the casing parts are cylindrical.
4. The arrangement according to claim 1 , wherein the means for moving the stop element comprise a screw bar to be attached to the stop element and arranged to co-operate with a counter element arranged to the housing part.
5. The arrangement according to claim 1 , wherein the outer surface of the stop element and the inner surface of the housing part are provided with control members for ensuring axial movement of the stop element in relation to the housing part.
6. The arrangement according to claim 1 , wherein the body part comprises measuring elements such as a light source and analysis circuit.