JPH062123Y2 - Automatic temperature measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to an automatic temperature measuring device for automatically measuring the temperature of each fixed point while moving a temperature detecting element.

Conventional technology and its problems Conventionally, as a method of measuring the internal temperature distribution of a reactor or the like, a direct method in which a temperature detecting element is installed at each measurement point is known. There have been major problems in the difficulty of installing the temperature detecting element in advance and maintainability. As an alternative to such a direct method, there has recently been proposed a device that measures the temperature at each fixed point on each side while moving the temperature detecting element installed inside by setting the driving device installed outside. There is. In this type of device proposed so far, the drive device is overwhelmingly composed of a combination of an AC / DC motor and a gear, and there are the following problems.

i A conversion device for converting rotational motion into direct motion and a positioning device such as an encoder are required, and the structure tends to be complicated and large.

ii Applicable places are limited due to large size.

iii The atmosphere around the reactor is often high temperature, and especially when the drive device is installed on the reactor, the temperature rise of the motor coil is liable to cause a failure. It is not possible to ensure stable operation over

iv Depending on the contents and structure of the reactor, electric parts such as motors must have an explosion-proof structure, which is troublesome.

The present invention has been made for the purpose of eliminating such conventional problems.

Means for Solving the Problems The present invention provides a rodless cylinder including a moving body that is reciprocated in the axial direction of the cylinder outside the cylinder by fluid control, and is supported by the moving body of the cylinder. A temperature detecting element that is moved inside the temperature measuring unit by using a cylinder as a driving source, a detection switch that is supported by a moving body of the cylinder and that is moved outside the temperature measuring unit by using the cylinder as a driving source, and the above detection switch. It is equipped with a large number of detectors that are installed and fixed on the movement line of the switch so that they can cooperate with the switch and with a space between each other. An automatic temperature measuring device characterized by being configured to temporarily stop driving upon receiving a signal from the switch each time it is detected. According to the.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the automatic temperature measuring device according to the present invention, the rodless cylinder (1) is used as a driving source. The rodless cylinder (1) is provided with a moving body (2) which is reciprocated in the axial direction of the cylinder (1) outside the cylinder (1) by fluid control. Such a rodless cylinder (1) itself is already known, and various types such as a slit-tube type or a slitless tube in which the piston and the moving body are composed of a magnet are used. Is proposed. In the present invention, the type of rodless cylinder is not particularly limited as long as it has the moving body (2).

The rodless cylinder (1) is installed and fixed vertically on the front surface of the vertical panel (4) of the base (3), as is clear from the overall view shown in FIG. 1, for example.

Flat bar on the moving body (2) of the rodless cylinder (1)
(5) is fixed, and the temperature detecting element (6) is supported on one end side of the flat bar (5).

As the temperature detecting element (6), a thermocouple type is shown in the drawing, and the thermocouple may be either a single element thermocouple or a multi-pair thermocouple. Temperature sensor (6)
Is the bar at the upper end of the upper nipple (6a).
Supported by (5), the lower end of the sheath (6b) has a detection end (6
c), and the detection end (6c) is inserted, for example, in a temperature case (b) mounted on the central axis of the reaction tube (a). As the element (6), a resistance temperature detector or the like can be used instead of the thermocouple.

A first detection switch (7) for a measuring point and a second detection switch (8) for an origin are attached to the other end side of the flap bar (5) with their positions shifted back and forth.

On the moving line of the first detection switch (7) which is attached to the moving body (2),
A large number of first detection bodies (9) are installed and fixed with spaces formed between the respective detection bodies (9). This detector (9) is for determining the measurement point, the number of detectors (9) installed and the interval,
It may be appropriately determined according to the measurement conditions.

At a position higher than the uppermost first detection body (9a) on the movement line of the second detection switch (8) connected to the movement body (2),
The second detector (10) is installed and fixed. 2nd detection switch
(8) is for the origin and when the second detector (10) is detected,
A signal is issued to deactivate the rodless cylinder (1). First and second detection switch (7),
In order to prevent malfunction of (8), it is preferable to slightly shift the mounting position not only in the front and back but also in the top and bottom.

The detection switches (7) and (8) may be photoelectric switches (reflection type), proximity switches or the like that can generate a detection signal in cooperation with a detection body. Particularly in the case of a photoelectric switch, for example, a reflective tape may be used as the detection body, and it is easy to install and fix the detection body or change the installation position, which is preferable. The figure shows the case where the white detectors (9) and (10) are attached to the black mounting surface (20).

FIG. 2 shows a control circuit of the rodless cylinder (1), which is attached to the above-mentioned cylinder (1) and has upper and lower flow paths (11), (1
2) is provided with three-way solenoid valves (13) and (14), respectively.

When the rodless cylinder (1) is in the non-driven state, the solenoid valves (13) and (14) are both in the non-excited state, and the upper and lower flow paths (11) and (12) are pressurized. Air source
It is open to the (15) and (16) sides. Since the pressurized air flows in from the upper and lower sides of the cylinder (1) through the upper and lower flow paths (11) and (12) to balance the pressure, the moving body (2) maintains a stopped state.

When the cylinder (1) is in a driving state, one solenoid valve (13) (or (14)) is in a non-excited state, the other solenoid valve (14)
(Or (13)) is excited, and the flow path (12) (or (11)) attached to the excited solenoid valve is opened to the atmosphere side and the pressure drops. The pressure balance is lost, and the moving body (2) moves down (or moves up). The moving speed of the moving body (2) can be controlled by the speed controllers (13a) and (14a).

While the moving body (2) is moving, when the detection switch (7) moving together with the moving body (2) detects the detecting body (9), the solenoid valve (1
4) (or (13)) is temporarily de-energized and becomes non-excited, and the cylinder (1) is temporarily stopped (non-driven). It is automatically restored to the driving state of. For this purpose, for example, a timer for automatic reset is incorporated in a control circuit (not shown) that electrically connects the detection switch (7) and the solenoid valves (13), (14). Such automatic return means itself is known, and various known automatic return means can be adopted.

In the device of the present invention having the above-described structure, in the state before the temperature measurement is started, the moving body (2) is moved as shown in FIG.
Is near the stroke end on the upper end side of the cylinder (1), the second detection switch (8) matches the second detection body (10),
The first detection switch (7) is located slightly above the uppermost first detection body (9a). Further, the detection end (6c) of the temperature detection element (6) is located slightly above the first measurement point (c ₁ ). Furthermore, the rodless cylinder (1) is in a non-driving state, and therefore the moving body (2) is stopped.

When the rodless cylinder (1) is driven in the state shown in FIG. 1, the solenoid valve (14) of the lower flow passage (12) is excited, and the flow passage (12) is opened to the atmosphere side. , Lower channel (11), (12)
As a result, the pressure balance between the upper chamber and the lower chamber of the cylinder (1) is lost, so that the moving body (2) begins to descend, and at the same time, the reaction tube
(a) Outside, the first detection switch (7) is also a reaction tube.
In (a), the detection end (6c) of the temperature detection element (6) starts to fall. This descent rate can be controlled by the speed controller (14a).

While descending, the first detection switch (7) has the uppermost detection body (9a)
When detected, from the electrical signal transmitted from the switch (7), the excitation of the solenoid valve (14) on the lower flow path (12) is temporarily cut off and becomes a non-excitation state, and the cylinder (1) Is temporarily stopped. Therefore, the moving body (2) is temporarily stopped at this detection position.

Therefore, the detecting end (6c) of the temperature detecting element (6) is also the reactor (a).
Inside, a temporary stop is made at a point equidistantly descending from the moving body (2), that is, at a position corresponding to the first measurement point (c ₁ ), and during this stop, temperature measurement is performed by the detection end (6 c).

After the stop of the moving body (2) is maintained for a certain period of time, for example, about 20 seconds, the solenoid valve (14) automatically returns to the energized state, and the cylinder (1) returns to the original driving state, so that the moving body (2) 2)
And the detection switch (7) attached to it and the temperature detection element
(6) etc. start descending again. During this descent, when the detection switch (7) detects the second stage detection body (9), the excitation of the solenoid valve (14) is temporarily cut off again, temporarily stopped, and the second measurement point ( The temperature measurement in c ₂ ) is performed for a certain period of time. In this way, the detection switch (7) detects the detection object (9),
Each time (2) is temporarily stopped, temperature measurement by the detection end (6c) is performed for a fixed time at each measurement point.

After completing the temperature measurement at the lowest measurement point (c _n ) where the detection switch (7) has detected the lowest detection body (9b),
When the solenoid valve (13) of 1) is in the non-excited state to the excited state,
The solenoid valve (14) of 2) is automatically switched from the excited state to the non-excited state. For this switching, various known automatic switching means such as a counting counter for counting measurement points and a proximity switch are adopted.

The moving body (2) starts to move up by switching the solenoid valves (12) and (14), and even during this rising time, the detection switch (7) causes the detection body ( Each time 9b) (9) ... (9a) is detected, the temperature is measured by the detection end (6c).
Temperature measurement during such rise may not be necessary, and when not necessary, the detection switch (7) and the solenoid valve (13) of the upper flow path (11)
You just have to remove the electrical connection.

When the second detection switch (8) detects the second detection body (10) due to the rise of the moving body (2), a signal from the detection switch (8) causes the solenoid valve (13) of the upper flow path (11) to move. The excitation is cut off and the cylinder is de-excited. The cylinder (1) stops driving, returns to the state before the operation is started, and prepares for the next operation.

In the present invention, when the solenoid valve (14) of the lower flow path (12) is actuated to pause the moving body (2) at each measuring point while descending, the length of the flow path (12) is reduced. Depending on the size, a response delay may occur in the air pressure. This response delay appears as an error in the stop position of the moving body (2). In order to eliminate such a response delay, a pressure equalizing flow passage (17) can be provided between the upper and lower flow passages (11) (12), and the pressure equalizing flow passage (17) is provided with a detection switch (7). A two-way solenoid valve (18) is provided which is opened each time a detection signal is received. Generally, in order to prevent the gravity of the moving body (2) from falling naturally, the set pressure of the lower flow path (12) is set to the upper flow path (1
It is slightly higher than the set pressure of 1). The pressure equalizing channel
The (17) is provided with a check valve (19) so that the pressure in the lower flow passage (12) does not escape to the upper flow passage (11) side.

Effect According to the present invention, the temperature detecting element is driven by the rodless cylinder, and the stop position of the temperature detecting element is detected by the detecting switch provided on the moving body of the rodless cylinder. No matter how many measurement points there are, only one is required. By combining one rodless cylinder and one detection switch, temperature can be automatically measured at many measurement points, and the structure is simple. It is possible to provide such a device having a compact structure. Also, because of its compact structure, there is no restriction on the installation location.

Further, in the present invention, since the rodless cylinder is used as the driving device, there is no failure even in the atmosphere of high temperature, dust, corrosive gas, etc., and stable operation can be secured for a long period of time.

[Brief description of drawings]

FIG. 1 is an overall perspective view schematically showing an embodiment of the present invention, and FIG. 2 is a control circuit diagram of a rodless cylinder. In the figure, (1) is a rodless cylinder, (2) is a moving body,
(3) is a stand, (4) is a vertical panel, (5) is a flat bar, (6) is a temperature detection element, (7) is a first detection switch, (8) is a second detection switch, and (9) is The first detector, (10) is the second detector, (1
Reference numerals 1) and 12 are flow passages, and 13 and 14 are three-way solenoid valves.

Claims (1)

[Scope of utility model registration request] 1. A rodless cylinder comprising a moving body that is reciprocally moved outside the cylinder in the axial direction of the cylinder by fluid control, and a temperature is measured by using the moving body of the cylinder as a driving source. Temperature detection element that is moved inside the unit, a detection switch that is supported by the moving body of the cylinder and that is moved outside the temperature measurement unit using the cylinder as a drive source, and the switch on the movement line of the detection switch. The cylinder is equipped with a large number of detectors that are installed and fixed so that they can cooperate with each other, and the switch is installed each time the detector detects one detector during the movement of the moving body. The automatic temperature measuring device is characterized in that it is configured to temporarily stop the driving in response to the signal from.