JPH0599703A - Insertion type sensor loading/unloading device - Google Patents

Abstract

PURPOSE:To improve the operability and safety of the device by arranging a control handle for lifting/lowering an insertion type sensor at a low position. CONSTITUTION:A driving device 22 for lifting/lowering a sensor 6 is arranged above the insertion tube 2 of a flow tube 1 through a ball valve 3 and fitting cylinder 5 and the device 22 fixes an internal gear 9 rotated by means of a handle 9a, planetary gears 10 and 10 engaged with the gear 9, converter 18 which is perpendicularly connected to a lifting/lowering table 15 engaged with a driving screw firmly fixed on the axis of the gears 10 and 10, supporting cylinder 7, and sensor 6. During measurement, the sensor 6 is inserted into the tube 1 by opening the valve 3 and, at the time of removing the sensor 6, the handle 9a is turned and the valve 3 is closed when the sensor 6 reaches a position above the valve 3.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an insertion-type sensor attachment / detachment device, and more particularly to a structure of an insertion-type sensor attachment / detachment device that can be operated at a low position without removing a sensor for detecting a physical quantity of a fluid to be measured from a flow tube. Regarding

[0002]

2. Description of the Related Art There is known an insertion type sensor in which a sensor is inserted in a flow tube for easily measuring a physical quantity such as a density or viscosity of a fluid to be measured or a flow rate, and the physical quantity is measured based on an output of the sensor. Has been. These insertion type sensors are attached with a specification structure according to the temperature or pressure condition of the fluid, but it is necessary to remove the inserted sensor from the flow tube for repair and inspection of these sensors. When removing the sensor from the flow tube, install a valve device such as a ball valve between the flow path and the sensor drive device so that the fluid to be measured does not flow out of the flow tube, and then flow through the valve device. It is common to do this after blocking the road. In particular, when the temperature or pressure of the fluid is high, or when the flow passage cannot be closed for a long period of time, the above-mentioned means for removing the fluid through the valve device is an essential mechanism.

2 (a) and 2 (b) are views for explaining the structure of a conventional insertion-type sensor attaching / detaching device, FIG. 2 (a) is a side sectional view, and FIG. 2 (b) is a transducer part. FIG. 3 is a front view of FIG. 3, in which 30 is a flow tube, 31 is a ball valve, 32 is a mounting cylinder, and 33.
Is a support plate, 34 is a sealing material, 35 is a seal cap, 3
6 is a support, 37 is a fixed plate, 38 is a nut, 39 is a handle, 40 is a sensor, 41 is a support cylinder, 42 is a converter, 43
Is a guide plate, and 44 is a screw rod.

In the drawing, the flow tube 30 is provided with an axis in a direction perpendicular to the axis of the flow tube 30, and the take-out tube 3 is opened.
0a flange 30b and ball valve 31 flange 31
a is joined, and the mounting cylinder 32 is joined in series to the other flange 31b of the ball valve 31 by a flange 32a. A support plate 33 is fixed to the other end surface of the mounting cylinder 32, and the inside of the mounting cylinder 33 forms a hollow passage 32b communicating with the flow pipe 30 by the opening of the ball valve 31. One end of a plurality of columns 36 is fixed near the outer periphery of the support plate 33 by welding or the like, and a fixing plate 37 having a handle 39 rotatably fixed is fixed to the other end of the column 36 by a nut 38 or the like. There is.

The handle 3 is provided at the center of the plurality of columns 36.
9 is provided with a screw rod 44, and a guide plate 43 for guiding the pillar 36 so as to be vertically movable by using the support rod 36 as a guide rod, and a converter 42 fixed to the lower surface of the guide plate 43. The support cylinder 41 is disposed, the sensor 40 is mounted on the end of the support cylinder 41, and the guide plate 43, the converter 42, the support cylinder 41, and the sensor 40 are integrally formed. A lead wire (not shown) of the sensor 40 is inserted into the support cylinder 41 and connected to the converter 42. Further, the support cylinder 41 is coaxially connected to the screw rod 44, and is liquid-sealed with the support plate 33 by the seal material 34 and sealed by the seal cap 35.

In the state shown in FIG. 2A, the sensor 40 is in the flow tube 3
In the figure showing that the ball valve 31 has been opened and the measurement is being performed, the ball valve 31 is opened, and the sensor 40 fixed to the end of the support cylinder 41 is shown inserted through the through hole of the valve body (not shown). It is located in the position. The liquid to be measured is sealed by the sealing material 34,
It will not be leaked to the outside. At this time, the converter 4
2 is in the solid line position.

When removing the sensor 40, first, the handle 39 is rotationally driven to move the screw rod 44 upward.
This movement raises the sensor 40 to the dotted line position of the mounting tube 32. At this time, the converter 42 also moves to the dotted line position. Next, the ball valve 31 is closed to close the fluid to be measured and the sensor 4
The flow path to 0 is blocked, the flange 32a is unjoined, and the upper portion is removed. In the above operation, the sensor 40
The moving distance of is a long stroke from the solid line position to the dotted line position. Therefore, the column 36 is also long, and the position of the handle 39 provided on the upper part of the column 36 is higher, and the operation of the handle is a work at a high place, which is inconvenient and dangerous.

[0008]

The present invention has been made in view of the above circumstances, and an object thereof is to provide an insertion-type sensor attachment / detachment device capable of easily and safely operating a handle at a low position.

[0009]

In order to achieve the above object, the present invention provides (1)
A flow tube through which the fluid to be measured flows and a flow path that intersects with the flow tube axis to open, valve means disposed outside the flow tube, and valve means that moves on the flow path axis of the valve means. A sensor for detecting a physical quantity of the fluid, which is removable by opening and closing, and a drive means arranged on the flow path axis of the valve means to move the sensor on the flow path axis. The means includes an internal gear that is rotationally driven around the flow path axis, a planet gear that meshes with the internal gear and rotates around a fixed position axis, and extends on the axis of the planet gear and is fixed to the planet gear shaft. A drive screw, and an elevator that is screwed onto the drive screw and moves coaxially, and that has the sensor, the support tube of the sensor, and the converter fixedly attached thereto.
Further, (2) in the above (1), a support means for press-contacting a sensor or a support cylinder for fixing the sensor is interposed between the flanges connecting the flow pipe and the valve means, and the support means is provided at the center. A through hole is provided, and a plate-shaped body having a tapered surface in a cross section around the opening is formed, and a tapered surface that is in surface contact with the tapered surface formed on the sensor or the outer periphery of the support cylinder. It is what

1 (a) and 1 (b) are views for explaining one embodiment of the insertion type sensor attaching / detaching device of the present invention.
1A is a side sectional view, and FIG. 1B is a sectional view taken along the line A- in FIG.
It is a sectional view taken along the line A, in which 1 is a flow tube, 2 is an insertion tube, and 2a.
Is a mounting flange, 3 is a ball valve, 4 is a sensor holder, 5 is a mounting cylinder, 6 is a sensor, 7 is a supporting cylinder, 8 is a base,
Reference numeral 9 is an internal gear, 9a is a handle, 11 is a holding lid, 12 is a spacer, 13 is a pillar, 14 is a drive screw, 15 is an elevator, 16 is a guide tube, 17 is a support plate, 18 is a converter, 19
Is a connector, 20 is a sealing material, and 21 is a case.

In the drawing, an insertion tube 2 having an axis intersecting the axis of the flow tube 1 substantially perpendicularly to the flow tube 1 is opened, and a sensor 6 is arranged. At the top of the insertion tube 2 is a mounting flange 2
The ball valve 3, the mounting cylinder 5, and the drive device 22 are connected and fixed in series via the flanges 3a, 3b, 5a, etc. As a result, a hollow path is formed between the mounting tube 5 and the flow tube 1 and filled with the liquid to be measured, and the sensor 6 can move up and down in the hollow path. Measuring sensor 6
Is a state in which the ball valve 3 is opened to be partially inserted into the flow tube 1 and is in the fluid to be measured and is being measured, and the support cylinder 7 and the converter 18 are integrally fixed.

The drive unit 22 is arranged on the base 8 fixed to the mounting cylinder 5. The base 8 has a through hole in the center thereof, in which a sealing material 20 for penetrating the supporting cylinder 7 in a liquid-tight manner is arranged. The sealing material 20 is pressed by a guide cylinder 16, and the guide cylinder 16 is bolted. Support cylinder 7 fixed on the base 8 by
Guide up and down movement of. Further, an internal gear 9 having an outer diameter substantially matching the outer peripheral portion is provided on the base 8, and a minute gap is provided by a pressing lid 11 provided at an interval defined by a spacer 12. It is rotatable. Handle 9a
Is for rotating the internal gear 9.

Two planetary gears 10, 10 arranged on the diameter are meshed with the internal gear 9, and the planetary gears 10, 10 are engaged with each other.
A driving screw 14 is fixed to the shaft of the shaft 10 in parallel therewith, and both ends of the driving screw 14 are rotatably provided with bearings 14a,
It is supported by 14b. The bearing 14 a is fixedly mounted on a support plate 17 fixed to the upper surface of the base 8 by a plurality of columns 13, and the bearing 14 b is embedded in the base 8. On the other hand, an elevating table 15 is screwed onto the drive screws 14 and 14, and the drive screws 14 and 14 are moved up and down by rotation. A mounting base 15a for fixing the converter 18 is provided on the elevating base 15 so as to cover the guide cylinder 16, and is fixed to the support cylinder 7 by a fixing screw 15b. The converter 18 is fixed to the mounting base 15a via a converter base 18a. The lead wire 19 a between the converter 18 and the sensor 6 is detachably connected by the connector 19 and inserted into the support cylinder 7.

Next, the operation of the insertion type sensor attaching / detaching device of the present invention having the above structure will be described. Sensor 6 in the state shown
When removing the case, first remove the case 21 and then the handle 9
By rotating a and transmitting the rotation to the planetary gears 10, 10, the sensor 6 moves together with the lift 15 to reach the dotted line position. At the same time, the lifting table 15 also moves to the dotted line position, and the converter 18
The converter 18 can be removed by passing through the through hole 17 provided in the support plate 17 and disconnecting the connector 19 at a position protruding to the outside. Further, when the handle 9a is rotated to raise the elevating table 15, the ball valve 3
The sensor 6 can be easily inspected by closing the valve, removing the mounting cylinder 5, and removing the mounting tube 5. Although the opening / closing valve has been described as the ball valve 3, it is not necessary to be the ball valve.

When the sensor 6 is inserted, the ball valve 3 can be opened by the reverse operation described above, and the handle 9a can be returned to the solid line position shown in the drawing. A sensor holding member 4 is interposed between the sensor holding member 4 and the sensor holding member 4 for holding the sensor 6 in a double-sided manner. For example, the sensor holding member 4 is a flexible plate-like member such as resin and has a tapered surface 4a. The through hole is provided, and the sensor 6 can be stably held by the surface contact between the tapered surface 4a and the holding ring 6a provided on the sensor 6. Further, since the sensor holding member 4 is made of a flexible material, the sensor 6 will not be damaged even if there is a slight displacement.

[0016]

[Effect] As is apparent from the above description, the present invention has the following effects. (1) Effect corresponding to claim 1: Since the internal gear is rotated by the handle, the sensor is moved up and down via the planetary gear that is meshed with the internal gear and rotated.
The handle position can be lowered, making it easy and safe to operate. In addition, repair and inspection of sensors and converters will be easy. Further, since the converter is arranged in the driving device during the measurement, the converter is always housed in the case, is not easily influenced by the external environment, and the reliability is increased. (2) Effect corresponding to claim 2: Since the sensor is held on both sides by the sensor holding member having the tapered surface and the guide tube, it is possible to eliminate vibration due to the flow of fluid during measurement. Further, since the sensor holding member is made of a flexible material such as a resin material such as Teflon, it is possible to allow a sufficient amount of movement without damaging the sensor.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of an insertion type sensor attachment / detachment device of the present invention.

FIG. 2 is a view for explaining the structure of a conventional insertion-type sensor attaching / detaching device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Flow pipe, 2 ... Insertion pipe, 2a ... Mounting flange, 3 ... Ball valve, 4 ... Sensor holding member, 5 ... Mounting cylinder, 6 ... Sensor, 7 ... Support cylinder, 8 ... Base, 9 ... Internal gear , 9a ... Handle, 11 ... Holding lid, 12 ... Spacer, 13 ... Strut, 1
4 ... Drive screw, 15 ... Elevating table, 16 ... Guide tube, 17 ... Support plate, 18 ... Transducer, 19 ... Connector, 20 ... Sealing material, 21 ... Case.

Claims (2)

[Claims] 1. A flow tube through which a fluid to be measured flows and a flow path that intersects with the flow tube axis and is open, and valve means disposed outside the flow tube; and a flow path axis of the valve means. A sensor that detects the physical quantity of the fluid that is removable by moving the valve means and opening and closing the valve means, and drive means that is disposed on the flow path axis of the valve means and moves the sensor on the flow path axis. The drive means has an internal gear that is driven to rotate around the flow path axis, a planet gear that meshes with the internal gear and rotates around a fixed position axis, and the planet that extends on the axis of the planet gear An insertion characterized by comprising a drive screw fixed to a gear shaft and an elevating table screwed onto the drive screw to move coaxially and fixed to the sensor, a support cylinder of the sensor and a converter. Type sensor attachment / detachment device. 2. A support means for press-contacting a sensor or a support cylinder for fixing the sensor is interposed between flanges connecting the flow pipe and the valve means, and the support means is provided with a through hole at a center thereof and an opening portion. The plate-shaped body whose peripheral cross section is formed by a taper surface, and the taper surface which is in surface contact with the taper surface formed on the sensor or the outer periphery of the support cylinder on the plate-shaped body. Insertion type sensor attachment / detachment device.