JP2502485Y2 - Sensor mounting jig - Google Patents

Description

[Detailed description of the device]

[0001]

This invention relates to a sensor mounting jig.

[0002]

2. Description of the Related Art In a stirrer, a pump, etc., a technique has been developed for monitoring the state of a stirrer using a displacement sensor or the like to detect the occurrence of leakage or failure at an early stage. When a sensor is installed inside a closed container such as a stirrer or a pump, a hole is made in the container, an appropriate jig is attached to the hole, and the sensor is attached through the jig. Adopted. Between the hole of the closed container and the jig, between the jig and the sensor, etc.
It is configured to be sealed by a ring or a sleeve.

[0003]

However, in the case of the conventional jig construction, when the seal such as the O-ring or the sleeve is damaged or corroded by the sealed object in the closed container, the seal is replaced. There was a problem that I could not do it easily.
Further, in the case of a non-contact displacement sensor or the like, it is necessary to adjust the distance to the measurement object on the order of μm, and it is necessary to move the sensor while maintaining the sealing performance.
There is a risk that the seal may be damaged due to such movement. Further, there is a problem that a sealed body such as a liquid may flow out of the container due to damage of the sensor casing itself. The present invention aims to solve the above-mentioned problems of the prior art.

[0004]

In order to achieve the above object, the sensor jig of the present invention has a hole formed in a wall of an airtight container.
The mounted bush and the bush can be moved in the axial direction
A probe case that penetrates through and projects into a closed container;
There is a seal between the bush and the probe case at the middle in the axial direction.
Driven sheet that moves with the movement of the probe case.
Between the bush and the probe case.
Seal at the rear end of the sealed container toward the outside, and
The fixed seal that does not move with the movement and the probe case
Detachable from the outside of the bush,
Contact the rear end to removably fasten the fixed seal.
It is characterized by having a color.

[0005]

The seal between the bush and the probe case is moved by the movement of the probe case, and the rear end of the bush seals between the bush and the probe case. Fixed that does not move as the case moves
The seal maintains a high sealability, and even if the driven seal that moves due to the movement of the probe is damaged, the fixed seal that does not move maintains the sealability. Again
The fixed seal can be easily replaced by the

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a hole is formed in the closed container X, and the bush 1 is inserted therein. The bush 1 is screwed into the closed container X with a screw 15, and the gap between the bush 1 and the closed container X is sealed by a packing 5 at a step portion of a hole.

A probe case 3 is inserted from the outside of the closed container X into the inside of the closed container X in the bush 1. That is, a screw 6 is formed at the end of the bush 1 on the inner side of the closed container X, and the probe case 3 is screwed therein. The probe case 3 is configured so that the probe case 3 is moved in the vertical position direction in the drawing by the screwing amount of the probe case 3 to adjust the position.

A circumferential groove is formed on the outer periphery of the intermediate portion of the probe case 3, and a driven O-ring 10 is fitted therein to seal the inner periphery of the bush 1. Since the driven O-ring 10 is mounted on the probe case 3 side, the driven O-ring 10 moves along with the movement of the probe case 3 in the axial direction. On the other hand, a groove having an open upper end is similarly formed on the inner circumference of the end of the bush 1 on the outer side of the container, and the fixed O-ring 11 is fitted and inserted therein, so that the outer circumference of the probe case 3 is sealed. Is configured. Since this fixed O-ring 11 is mounted on the bush 1 side,
It is fixed without moving in the axial direction, and is configured not to move due to the movement of the probe case 3. The fixed O-ring 11 can be removed and attached from the upper end side of the bush 1.

A collar 2 is further mounted on the upper end of the bush 1. The collar 2 is fitted on the outer circumference of the probe case 3 with a screw 20, and the fixed O-ring 1 is attached.
1, the fixed O-ring 11 also seals the end surface of the collar 2 at the end. The bush 1 and the collar 2 serve as a double nut. The fixed O-ring 11 can be easily attached to and detached from the bush 1 by removing the collar 2.

A moving gap 31 is provided between the probe case 3 and the collar 2 and between the probe case 3 and the bush 1 to form a movement allowance in the axial direction of the probe case 3, It is possible to adjust the movement of.

A ceramic case 4 is attached to the tip of the probe case 3 protruding into the closed container X,
A predetermined sensor (not shown) is housed inside this. The sensor cable Y of the sensor is configured to be led out of the closed container X from the open rear end of the probe case 3. A resin case or the like may be used instead of the ceramic case 4. As shown in FIG. 2, the rear end of the probe case 3 has a tapered shape, and a cap taper screw 30 is formed on the rear end of the probe case 3 so that a seal tape can be wrapped around and packing can be inserted to attach the cap 7. ing. Thus, even if the probe case 3 or the ceramic case 4 is damaged or cracked, the fluid inside the closed container X can be effectively prevented from flowing out of the closed container X through the inside of the probe case 3.

In the above structure, the space between the bush 1 and the closed container X is sealed by the packing 5. The packing 5 is tightened and fixed by the screw 15 of the bush 1. A space between the probe case 3 and the bush 1 is sealed by a driven O-ring 10 and a fixed O-ring 11. The driven O-ring 10 seals while moving as the probe case 3 moves. Even if twisting or breakage occurs due to the movement, leakage is not caused because the fixed O-ring 11 seals. Moreover, the fixed O-ring 11 is also fastened by the collar 2 and can be replaced by removing the collar 2. During the replacement, the driven O-ring 10 is sealed and can be replaced without leakage. Furthermore, the effect of the double nut of the collar 2 and the bush 1 ensures the entire fastening. Since the ceramic case 4 can be accurately adjusted in position by adjusting the screwing amount of the probe case 3 while maintaining such an excellent sealing property, it is also effective for a sensor that requires alignment with an object to be measured. Can be dealt with. Further, when the probe case 3 or the ceramic case 4 is damaged or cracked, the sensor cable Y is removed and the cap 7 is screwed into the cap screw 30 to prevent the outflow of the fluid or the like inside the closed container X. Will be possible.

[0013]

As described above, the sensor jig of the present invention is a bush installed in a hole provided in a wall of an airtight container.
And a closed container that penetrates the bush so as to be movable in the axial direction
Probe case protruding inward, said bush and probe
Seal the space between the cases at the axial middle part and
A driven seal that moves with the movement of the roller, and the bush.
Between the probe case, the bush outside the sealed container
Seal at the edges and move as the probe case moves.
No fixed seal and removable from outside of the probe case
Insert it as far as it will go and touch the rear end of the bush
And a collar for detachably fastening the fixed seal.
Therefore , it is possible to move the probe case while maintaining a high sealing property, and it is possible to effectively perform highly accurate position adjustment of the sensor.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view showing an embodiment of the present invention.

[Explanation of symbols]

1: Bush, 2: Color, 3: Probe case, 4:
Ceramic case, 5: packing, 6: screw, 7: cap, 10: driven O-ring, 11: fixed O-ring, 1
5: screw, 20: screw, 30: taper screw for cap, 31: moving gap.

Claims (2)

(57) [Scope of utility model registration request] 1. A bush mounted in a hole provided in a wall of a closed container, a probe case penetrating the bush so as to be movable in the axial direction and protruding into the closed container, and an axis line between the bush and the probe case. The driven seal that seals at the middle part in the direction and moves with the movement of the probe case, and the gap between the bush and the probe case at the rear end of the bush in the outer direction of the sealed container, and with the movement of the probe case. A sensor comprising: a stationary seal that does not move; and a collar that is detachably fitted from the outside of the probe case and that contacts the rear end portion of the bush to removably fasten the stationary seal. Mounting jig. 2. The sensor mounting jig according to claim 1 , further comprising a cap that closes an open end of the probe case outside the hermetically sealed container.