JPH0424443Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The invention is applicable to, for example, changing the position of a measuring instrument, etc. that measures the hydrogen ion concentration (PH value) of a corrosive fluid to be measured. This invention relates to a position changing device.

“Conventional technology” Conventionally, PH was used for chemical operations, control of environmental inhibitors, etc.
After adjustment, the PH meter used as this indicator had problems related to measurement accuracy and the service life of the electrode, such as dirt due to scaling of the electrode that is the PH measuring part, calibration, and aging of the electrode. For this reason, for example, it is required to regularly clean the electrode and perform a simple check every 5 days, perform a precision check every 10 days, and clean the electrode holder and check the conductivity every month. Since dirt on the electrode greatly affects measurement accuracy, various methods such as irradiating the tip of the electrode with ultrasonic waves during measurement, brushing the electrode at regular intervals, and spraying water or a chemical solution such as 5% hydrochloric acid onto the electrode if it is easily soiled, etc. Several electrode cleaning methods have been used. Furthermore, electrodes that can be used for special measuring liquids such as those for high alkali, high temperature, and hydrofluoric acid resistance have been developed and put into practical use.

``The problem that the invention attempts to solve'' However, the pH of the waste liquid in the garbage pyrolysis equipment is
In the case of measurement, because the properties of the measurement liquid are extremely specific, conventional PH measurement methods have an extremely short electrode life (about one week), require frequent calibration of the PH meter, and require time-consuming maintenance and inspection. In addition, automatic control of the PH value was difficult due to the low reliability of the PH detector.

Therefore, in order to solve the above problems, the applicant proposed a new PH measuring device
(See Publication No. 59-41756). This device is provided with a cleaning water tank for the PH measurement measurement section adjacent to the PH measurement tank, and the PH measurement measurement section is moved between the PH measurement tank and the cleaning water tank after a certain period of time by a moving mechanism. The PH measurement is carried out by moving the PH meter up and down and in the horizontal direction, and has the excellent effect of stabilizing the measurement accuracy of the PH meter and extending its lifespan. However, in the case of the above-mentioned PH measurement device, the above-mentioned moving mechanism connects a moving shaft that moves in the horizontal direction to a linear head motor, and an air cylinder is vertically disposed at the tip of the moving shaft. The PH meter body is connected to the lower end of the piston rod, and the linear head motor is driven to move the moving axis horizontally together with the air cylinder, and the piston rod of the air cylinder is moved up and down to raise and lower the PH meter body. Therefore, a linear head motor and an air cylinder are required, which increases the complexity and size of the device and increases the manufacturing cost.

This invention was made in view of the above circumstances,
The purpose of this is to have an extremely simple structure, easy manufacture, and extremely reliable and stable movement when moving a measurement unit for measuring pH, etc. The purpose of the present invention is to provide a repositioning device that can perform the following actions.

"Means for Solving the Problems" In order to achieve the above object, the present invention is a positioning device that moves an object to be moved up and down and horizontally to relocate it to a plurality of positions. A piston rod of a cylinder that moves the object to be moved is connected to the moving body via a connecting rod, and the piston rod of the cylinder is rotatable about its axis, while the piston rod of the cylinder moves to the piston rod of the cylinder. The sliders are connected to each other, and the mover is fitted into a groove formed in the outer guide plate, and an inner guide plate is provided in the groove of the outer guide plate. A plurality of moving passages are formed in sections to guide the movable member that moves by the forward and backward movement of the piston rod, and rotate the piston rod of the cylinder by a predetermined angle about its axis.

"Operation" In the position changing device of the present invention, the groove of the outer guide plate is divided into a plurality of moving passages by the inner guide plate, and the piston rod of the cylinder is advanced and retreated to move the mover along the moving passage. The piston rod of the cylinder is guided and rotated by a predetermined angle around its axis, and the object to be moved, which is connected to the piston rod via a connecting rod, is moved up and down and horizontally to change its position.

"Embodiment" Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 4.

Figure 1 is a diagram showing an outline of an automatic PH measuring device, and this automatic PH measuring device consists of a support stanchion 1
, measurement pot 2, cleaning pot 3, lifting cylinder 4, PH indicator 5, position switching master valve 6.
and a rotation guide mechanism (see Figures 2 and 3; in Figure 1, this rotation guide mechanism is built into the guide mechanism protection cover 9 and is not shown). It is said that

The measurement pot 2 has a measurement liquid connection part 20 at the bottom.
and a short overflow pipe 21 in the middle part,
A gasket (not shown) is embedded in the upper circumference. The short overflow pipe 21 is inserted up to the middle part of the funnel 22, and the lower part of the funnel 22 is connected to the liquid outlet pipe. Also, measurement pot 2
A limit switch 23 for position detection shown in FIG. 4 is installed on the top of the holder.

The washing pot 3 has a similar structure to the measuring pot 2. That is, a cleaning liquid connection part 30 is provided at the bottom, and a short overflow pipe 31 is provided at the middle part.
However, gaskets are provided on the upper circumference, and a funnel 32 is connected to the short overflow pipe 31. Further, the cleaning pot 3 is provided with a jet cleaning pipe 34 having a water jet cleaning solenoid valve 33 shown in FIG. A limit switch 35 is installed.

The lifting cylinder 4 is a double rod cylinder having a pair of vertically protruding piston rods 40 and 41, and this lower piston rod 4
1 is connected to the intermediate portion of a connecting rod 45, which has a balance weight 42 attached to one end and a PH meter main body 44 attached to the other end via a holding stand 43.
Further, at the upper end of the upper piston rod 40,
Mover 70 of the above position changing device (rotation guide mechanism)
are connected laterally (see FIGS. 2 and 3), and therefore, as both piston rods 40 and 41 of the lifting cylinder 4 move up and down, the mover connected to the upper piston rod 40 70 pivots in the horizontal direction as it moves up and down, thereby causing both piston rods 40 and 41 to rotate around their axes, and a holding base 43 connected to the lower end of this lower piston rod 41 via a connecting rod 45. The PH meter main body 44 and the balance weight 42 are moved up and down and horizontally in conjunction with the mover 70. Further, the PH meter main body 44 uses a flowing liquid type measuring device, and the holding table 43 has a structure having a lid that seals the upper portions of the measuring pot 2 and washing pot 3.

As shown in FIGS. 2 and 3, the rotation guide mechanism includes a U-shaped wide groove 71 and a U-shaped wide groove 71.
A pair of left and right narrow grooves 72, 73 connected to both the bifurcated lower ends of 1 (since FIG. 2 and FIG. A rectangular flat outer guide plate 74 having a shape of
0 and the wide groove portion 71 of the outer guide plate 74
The inner guide plate 75 is disposed inside the inner guide plate via a support member (not shown), and divides the wide groove portion 71 into two to form two movement paths P ₁ and P ₂ . And each of the above moving paths P ₁ ,
The left side (right side in Figure 3) of P ₂ in _{FIG .} The right side portions in FIG. 2 (the left side portions in FIG. 3) are branched from the narrow groove portion 73 and connected in a straight line. moreover,
Near the upper end of the wide groove portion 71 of the guide plate 74 and near the upper end of the substantially U-shaped inner edge of the inner guide plate 75, there are a pair of position detectors for detecting that the mover 70 has reached each vicinity. The limit valves 80 and 81 for
A limit valve 82 for detecting the initial set position is installed near the bottom of each of the valves 2 (see FIG. 2).

Next, the pneumatic/electrical control system will be explained based on FIG. 4. At both ends of the lifting cylinder 4, a pair of speed controllers 83, 84
The position switching master valve 6 is connected via an air pipe. The position switching master valve 6 is connected to the three limit valves 80, 81, 82 and a position switching solenoid valve 90 installed inside the guide mechanism protection cover 9 through air piping. In addition, the position switching solenoid valve 90 and each limit switch 23, 3
5, water jet control solenoid valve 33, and PH indicator 5
The PH meter main body 44 is electrically connected to the automatic control panel 91 via the PH meter body 44 .

In the automatic PH measuring device incorporating the rotating guide mechanism configured as described above, the measuring pot 2
When the PH measurement is completed after a certain period of time with the PH meter main body 44 inserted, the automatic control panel 91
outputs a signal to the position switching solenoid valve 90, and the position switching solenoid valve 90 is switched, thereby switching the state of the position switching master valve 6 from the measurement mode to the cleaning mode. By switching to this cleaning mode, air is introduced to the lower end side of the lifting cylinder 4, so that each piston rod 40, 41 begins to rise. Therefore, the holding stand 43 and the PH meter body 44, which are connected to the lower end of the lower piston rod 41 via the connecting rod 45, start to rise together with the balance weight 42. Then, the mover 70 fixed to the upper end of the upper piston rod 40 of the lifting cylinder 4 moves up along the narrow groove 72, and then moves to the upper moving passage P, which is composed of the wide groove 71 and the inner guide plate 75. Continue to rise along ₁ . Furthermore, the mover 70 rises obliquely along the oblique edge of the wide groove 71 of the outer guide plate 74, and stops when it reaches the upper end of the wide groove 71. When the mover 70 reaches the upper end, this is detected by the limit valve 80 for position detection,
By this operation of the limit valve 80, the state of the position switching master valve 6 is changed, and each piston rod 40, 41 of the lifting cylinder 4 starts to descend. This allows the upper piston rod 40
The mover 70 fixed to the inner guide plate 7
Move diagonally downward along the upper diagonal edge of 5, and then
It descends vertically and further moves obliquely downward along the lower oblique edge of the outer guide plate 74 to form the narrow groove portion 7.
Reach 3. In this case, the mover 70 moves up and down and rotates about the axis of the piston rod 40 in the middle of the move, so that the piston rods 40 and 41 rotate together, and the PH connected to the lower end of the lower piston rod 41 rotates. The meter body 44 also rotates and reaches a position above the cleaning pot 3 from the measuring pot 2. Then, the mover 70 that has reached the narrow width groove 73 descends along the narrow width groove 73, and
It stops at the lower end of the narrow groove portion 73. At this time, the PH meter main body 44, which is connected to the lower piston rod 41 together with the connecting rod 45, balance weight 42, and holding stand 43, is lowered as the lower piston rod 41 moves and is accommodated in the washing pot 3. Note that the PH measurement signal is held at the previous value when changing from measurement mode to cleaning mode. Further, when the PH meter main body 44 is placed in the washing pot 3, the limit switch 35 for position detection is activated.
In response to the activation signal of the limit switch 35, the automatic control panel 91 outputs a command signal to the water jet control solenoid valve 33, and a jet is supplied into the washing pot 3 via the jet washing piping 34 for a certain period of time, and the PH
The meter body 44 is cleaned with a water jet. Then, after a certain period of time has elapsed, the automatic control panel 91 switches the position switching solenoid valve 90 to switch the state of the position switching master valve 6 from the cleaning mode to the measurement mode. By switching the position switching master valve 6 to the measurement mode, air is supplied to the lower end side of the lifting cylinder 4, and each piston rod 40,
41 starts to rise, and therefore the PH meter main body 44,
Holding stand 43, connecting rod 45, balance weight 42
begins to rise with The mover 70 fixed to the upper end of the upper piston rod 40 is
It rises along the narrow width groove portion 73 and moves obliquely upward along the lower movement path _P2 , and stops when it reaches the upper part of the inner edge of the inner guide plate 75. When the position detection limit valve 81 detects this state, the position switching master valve 6
The state of each piston rod 40, 41 is changed.
begins to descend. As a result, the mover 70
It descends along the lower moving path P ₂ and reaches the narrow groove portion 72 . In this case, the mover 70 moves up and down and rotates about the axis of the piston rod 40, so that the piston rods 40 and 41 rotate together, and the PH connected to the lower end of the lower piston rod 41 rotates. The meter body 44 also rotates and reaches a position above the measurement pot 2 from the cleaning pot 3. Then, the mover 70 that has reached the narrow width groove 72 descends along the narrow width groove 72 and stops at the lower end of the narrow width groove 72. At the same time, the PH meter main body 44 is also lowered and accommodated in the measurement pot 2. When the PH meter main body 44 enters the measurement pot 2, the limit switch 23 is activated, and after a certain period of time, the held state is released and the actual measured value is output.

In this way, by providing the rotation guide mechanism, the PH meter main body 44 can be moved into one cylinder 4.
Measuring pot 2 and washing pot 3 are connected only by the operation of
It is possible to extend the life of the electrode and reduce the number of calibrations even for measurement liquids with special properties. In addition, before the PH measurement accuracy is degraded by the measurement solution, it is necessary to clean it and
By keeping the pH measurement value at the previous value during cleaning, stable automatic pH control can be achieved. Furthermore, since it is only necessary to newly manufacture the rotation guide mechanism and the automatic control panel, and to assemble commercially available parts for the rest, the structure can be simpler, smaller, and cheaper than conventional devices. Furthermore, the rotation guide mechanism is
It has a simple structure, is easy to manufacture, and requires no maintenance. In addition, it can be operated only by pneumatic on/off signals, and the movement path of the mover 70 is mechanically restricted, so the mover 70 can move smoothly. Therefore, the PH meter main body 44 can be smoothly and reliably moved between the measurement pot 2 and the cleaning pot 3.

In short, this device allows two movements of the PH meter main body 44, vertical and horizontal movements, using one cylinder 4.
It is operated by one on-off operation signal, and the inner and outer guide plates 75, 7
It operates within a mechanically constrained mechanism consisting of 4.

In the above embodiment, as shown in FIG. 1, the rotation guide mechanism (built in the guide mechanism protection cover 9) is arranged above, but the invention is not limited to this. , washing pot 3
(below the connecting rod 45 in Figure 1),
It may be installed.

"Effects of the Invention" As explained above, the present invention is a positioning device that moves a moving object up and down and in the horizontal direction to relocate it to a plurality of positions.
A movable piston rod of a cylinder that moves this object is connected via a connecting rod, and the piston rod of this cylinder is rotatable about its axis, while a mover is connected to the piston rod of the cylinder. , and this mover is fitted into a groove formed in the outer guide plate, and an inner guide plate is provided in the groove of the outer guide plate, and between the two guide plates, the movement of the piston rod of the cylinder is controlled. Since a plurality of moving passages are formed in sections to guide the moving element moving by the cylinder and rotate the piston rod of the cylinder by a predetermined angle around its axis, the groove of the outer guide plate can be divided into a plurality of grooves by the inner guide plate. By moving the piston rod of the cylinder forward and backward, the slider is guided along the movement path, and the piston rod of the cylinder is rotated by a predetermined angle around its axis, thereby connecting the connecting rod to the piston rod. By moving the moving object connected through the cable up and down and in the horizontal direction to change its position, the mover can be easily moved up and down and horizontally by simply moving the piston rod of the cylinder forward and backward. Therefore, the object to be moved can also be smoothly moved up and down and in the horizontal direction, and its position can be reliably changed. Therefore, due to the mechanical restraint properties and mechanism of this device, the device does not malfunction, and when used for example to move a measuring section for PH measurement, etc., the reliability of the moving operation is extremely high. In addition to being able to realize stable operation, it has a simple structure and is easy to manufacture, and has excellent effects such as requiring no maintenance or inspection.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention. Figure 1 is a perspective view of an automatic PH measuring device,
The figure is a schematic front view of the rotation guide mechanism (position changing device), FIG. 3 is a rear view thereof, and FIG. 4 is a schematic configuration diagram illustrating the pneumatic/electrical control system. 4... Lifting cylinder, 40, 41... Piston rod, 44... PH meter body (moving object), 45
... Connecting rod, 70 ... Mover, 71 ... Wide groove, 72, 73 ... Narrow groove, 74 ... Outer guide plate, 75 ... Inner guide plate, P ₁ , P ₂
...A moving passage.

Claims (1)

[Scope of utility model registration request] A positioning device for moving a moving object up and down and horizontally to change its position to a plurality of positions, wherein a piston rod of a cylinder that moves the moving object is attached to the moving object via a connecting rod. The piston rod of this cylinder is rotatably provided around its axis, and a slider is connected to the piston rod of the cylinder, and the slider is fitted into a groove formed in the outer guide plate. In addition, an inner guide plate is provided in the groove of the outer guide plate, and between the two guide plates, guides the mover that moves by the forward and backward movement of the piston rod of the cylinder, and aligns the piston rod of the cylinder with its axis. 1. A position changing device characterized in that a plurality of moving passages are formed in sections to rotate the device by a predetermined angle.