JP2000193529A - Sensor for measuring temperature within piping and the same with piping means - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sensor for measuring temperature within piping that is suited for measuring the temperature of a fluid such as a chemical liquid on a piping connected to a tank for accommodating the fluid instead of the tank. SOLUTION: The sensor for measuring temperature consisting of a probe 11 for detecting temperature, a lead wire 13 being connected to the probe 11, and a probe case 12 for covering an area near the probe 11 is mounted onto a piping joint 2 for connecting piping H for measuring the temperature of fluid such as a chemical liquid L that flows in the piping H. Then, the probe case 12 is formed for example integrally and has a probe covering part 12a for covering the probe 11 and a gear-lock part 12b that is gear-locked at an engagement part 23a in a connection port 23 of the rear piping joint 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe temperature measuring sensor and a pipe means suitable for measuring the temperature of a fluid such as a chemical solution, not on a tank containing the fluid, but on a pipe connected to the fluid. The present invention relates to a sensor for measuring the temperature in a pipe, comprising:

[0002]

BACKGROUND OF THE INVENTION Conventionally, there are drug devices for various uses which take a form in which a drug solution is contained in a tank and supplied by piping.
In such a drug device, it may be required to measure the temperature of the drug solution, and for example, a temperature measuring sensor using PT100Ω (platinum resistance thermometer) or various thermocouples is used. The measuring mode of the conventional temperature measuring sensor 1 'will be described. The temperature is measured by attaching the temperature measuring sensor 1' to a chemical tank T as shown in FIG.
That is, in this device, a through connector T2 is attached to the upper lid T1 of the chemical tank T, and the sensor unit 10 'of the temperature measuring sensor 1' is inserted into a through hole of the through connector T2. A packing 28 'is provided on the upper part of the through connector T2, and the sensor mounting nut 2 is provided.
6 'is fastened to the through connector T2, and the temperature measurement sensor 1' is attached.

[0003] Such a conventional temperature measuring sensor 1 'itself and its installation mode have the following problems. First, since the temperature measuring sensor 1 'is attached, for example, above the chemical solution tank T, an extra installation space is required, and the temperature measuring sensor 1' prevents the chemical solution tank T from being installed at an optimum position. The case had arisen. In addition, the design of the chemical liquid tank T must also take into account the mounting location of the temperature measuring sensor 1 ', which reduces the degree of freedom in design and is not suitable for diversification of drug devices. In addition, since the chemical liquid L is supplied through the pipe H, a difference between the temperature measured in the chemical liquid tank T and the temperature of the chemical liquid L at the actual use location cannot be inevitably generated. There was a problem that it was difficult to do. Further, as a problem of the temperature measuring sensor 1 ′, the probe cover 12 a ′ of the probe case 12 ′ that covers the probe 31 ′ is formed by welding, welding, or the like. However, there is a problem that the chemical solution L permeates.

In order to solve these problems, the location of the temperature measuring sensor 1 'must be changed to a chemical tank T.
Therefore, it is conceivable to perform measurement on piping closer to the place of use. However, to measure on piping, it is necessary to increase installation cost such as installation time and the number of parts, increase sealing problems such as liquid leakage, and piping for accurate measurement due to flowing. In order to mount the temperature measuring sensor 1 'in the middle of the pipe H, it is necessary to solve these newly generated technical problems.

[0005]

[Technical Problems Attempted to Be Developed] The present invention has been made in view of such a background, and when measuring with a temperature measuring sensor in the middle of a pipe of a drug device, the temperature measuring sensor can be attached more easily. , Mounting cost is also reduced,
The present invention also attempted to develop a novel sensor for measuring the temperature in a pipe, which has excellent sealing properties and can be attached to almost all commercially available pipe joints and pipes, and a sensor for measuring the temperature in a pipe provided with a piping means.

[0006]

According to a first aspect of the present invention, there is provided a pipe temperature measuring sensor comprising a probe for detecting a temperature, a lead wire connected to the probe, and a probe case for covering the vicinity of the probe. In the temperature measurement sensor, the temperature measurement sensor is attached to a pipe joint that connects the pipes, and measures the temperature of the fluid flowing in the pipes.The probe case includes a probe cover that covers the probe. And a locking portion locked at a fitting portion at a connection port of the pipe joint at the rear of the pipe joint.

According to a second aspect of the present invention, in addition to the above requirements, at least the probe case is formed of a fluorine resin.

According to a third aspect of the present invention, in addition to the above requirements, at least the probe cover of the probe case is integrally formed.
It does not have a fluid permeation hole.

According to a fourth aspect of the present invention, in addition to the above requirements, the probe for measuring the temperature in the pipe according to the condition of the fluid when the tip of the probe is locked by a locking portion of the probe case. It is characterized by being set at an appropriate position in a fluid passage of a pipe joint.

According to a fifth aspect of the present invention, in addition to the above requirements, in addition to the above requirements, the engaging portion of the probe case has a cylindrical shape, and the rear end face has a tapered surface tapered rearward. And a packing is provided behind it.

According to a sixth aspect of the present invention, in addition to the above requirements, a tubular conduit portion for covering the lead wire is formed at a rear portion of the engaging portion of the probe case. The conduit part is passed through a hole of the sensor mounting nut, and the sensor mounting nut is fastened to the connection port of the pipe joint in a state where the packing is pushed in by the sensor mounting nut.

Further, in the pipe temperature measuring sensor according to claim 7, in addition to the above requirements, the fluid is a chemical liquid.

Further, the pipe temperature measuring sensor provided with the pipe means according to claim 8 is provided with a pipe joint for connecting a pipe and a probe for detecting a temperature in a fluid passage of the pipe joint. A probe for measuring the temperature in the pipe, wherein the probe in the sensor for measuring the temperature in the pipe is covered with a probe case, and the probe case is configured such that the probe is located at an optimum position of the fluid passage of the pipe joint. It is characterized by having a locking portion for locking.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> The present invention will be described below with reference to the illustrated embodiments. The one shown in FIG.
An embodiment in which the temperature of the chemical solution L supplied from the chemical solution tank T is attached to the pipe H at an appropriate position using the pipe joint 2 and measured using the pipe temperature measuring sensor 1 according to the present invention. It is shown.

Next, before giving a detailed description of the sensor 1 for measuring the temperature in a pipe, the pipe H and the pipe joint 2 will be described.
The pipe H is a circular pipe, for example, made of fluororesin. In general, the most commonly used piping for chemical liquids is made of fluororesin, and the diameter of the pipe is common to a plurality of standardized dimensions.

Next, a description will be given of the pipe joint 2 used when the sensor 1 for measuring the temperature in the pipe is mounted. In the present specification, when the pipe joint 2 is attached to the pipe H, the pipe joint 2 substantially constitutes a part of the pipe H. Fitting 2
Although it is provided in the inside, the temperature of the fluid flowing substantially in the pipe H is measured. The pipe joint 2 is made of, for example, a fluorine resin or the like. In the case of the structure shown in FIG. 1, for example, the main body 20 is formed in a cheese shape, and two facing connection ports 21, 22 and T It has three identically shaped connection ports of the connection port 23 branched in a letter shape. And between the connection port 21 and the connection port 22,
A fluid passage 24 is formed, and the pipe temperature measuring sensor 1 of the present invention is attached to the connection port 23.

The connection port 21 and the connection port 22 located at both ends of the fluid passage 24 are provided with a pipe connection nut 25 for connecting a pipe H, and a sensor 1 for measuring the temperature in the pipe. The connection port 23 to which is mounted is provided with a sensor mounting nut 26 for mounting the same. Note that the pipe connection nut 25 and the sensor mounting nut 26 are distinguished and referred to in this way for convenience of description, but actually, nuts of the same shape that are generally distributed are used. Also, of course, the connection ports 21, 2
A packing for obtaining a hermetically sealed state with the pipe H is appropriately provided for 2.

The large-diameter pipe receiving portion at the connection port 23 is referred to as a fitting portion 23a of the in-pipe temperature measuring sensor 1 in the present invention, and is a small-diameter fluid inlet / outlet communicating with the fluid passage 24 at the back. The site is referred to as a measuring unit 23b. Further, from the fitting portion 23a to the measuring portion 23b
Is called a locking step 23c. The shape of the engaging step 23c of the fitting portion 23a may be a flat shape as shown in FIG. 2 or a claw-shaped type as shown in FIGS. 3 (a) and 3 (b). Good.

The structures of the pipe H and the pipe joint 2 are as follows.
It is not particularly different from those generally distributed. The pipes H and the pipe joints 2 for chemical liquids have almost constant standards in foreign and domestic countries, and the sensor 1 for measuring the temperature in a pipe according to the present invention is a pipe joint 2 that is generally distributed. One of its features is that it can be attached to almost all without any processing.

Next, the pipe temperature measuring sensor 1 will be described. The sensor 1 for measuring the temperature in a pipe comprises a sensor unit 10 comprising a probe 11 for actually detecting a temperature and a probe case 12 for covering the probe, and a lead wire 13 connected to the probe 11, and When the sensor unit 10 is connected to the connection port 23 of the pipe joint 2, the first packing 27 and the second packing 28 are used as an example to obtain the hermeticity. The probe 11 uses PT100Ω (platinum resistance thermometer) as an example. Of course, other than the platinum resistance temperature detector, various types of thermocouples that can measure various temperatures that can be conventionally known and that can be developed in the future and various other temperature measurement sensors can be appropriately used for the probe 11.

Further, a lead wire 13 is connected to the probe 11, and the lead wire 13 is connected to a microcomputer, and for example, a measured temperature is displayed on a display. The lead wire 13 is covered with a lead tube 14 made of fluororesin. The boundary between the lead wire tube 14 and the probe case 12 is covered with a heat-shrinkable sealing tube 29.

Next, the probe case 12 will be described. The probe case 12 is integrally formed using, for example, a fluorine resin having excellent chemical resistance and heat resistance, and covers the probe 11 and a part of the lead wire 13 near the probe 11. It is. Specifically, it comprises a probe cover portion 12a for covering the probe 11, a flange-shaped locking portion 12b behind the probe cover portion 12a, and a conduit portion 12c further behind the probe cover portion 12a.

To explain these parts in detail, the probe cover 12a at the tip is a small-diameter cylindrical tube.
It is inserted into the measuring part 23b of the pipe joint 2. The length of the probe cover 12a is the same as the length of the probe 11 inserted therein.
Is desirably set to such a length as to be an optimum position in the fluid passage 24. Incidentally, in the present embodiment, the position of the probe 11 is substantially at the center of the fluid passage 24. However, the "appropriate position" referred to in the claims is an appropriate position according to the condition of the fluid, that is, the flow rate of the fluid. ,
It refers to a position where the temperature can be measured appropriately in terms of the accuracy of the measured temperature, the point at which the flow of the fluid is not hindered, and the like in accordance with the flow velocity, pulsation, viscosity, and the like. The shape of the probe cover 12a is
The present invention can be implemented in various forms, for example, a cross section of a water droplet depending on the viscosity and the flow velocity of the fluid. The rear flange-shaped engaging portion 12b is connected to the front surface of the connection port 2
3 is a locking surface 12d that abuts on the locking step 23c, the rear surface is tapered toward the rear, and a packing seat surface 12e on which the first packing 27 is placed. The rear conduit portion 12c is also of a relatively small diameter cylindrical shape, and has a diameter that fits just into the outer surface hole 26a of the sensor mounting nut 26.

As an example, a first packing 27 and a second packing 28 of relatively hard rubber, which are substantially cylindrical, are fitted into the conduit portion 12c. First packing 2
7 has a taper surface substantially the same as the taper of the locking portion 12b of the probe case 12, and the rear end surface 27b also has a tapered surface tapered rearward. I have. On the other hand, the front end surface 28a of the second packing 28 has a taper surface having substantially the same angle as the taper of the rear end surface 27b of the first packing 27. The upper part has a flange, and the rear end face 28b is formed flat.

When the sensor unit 10 is fixed by the sensor mounting nut 26, the rear end surface 28b of the second packing 28 is connected to the sensor mounting nut 26 with the conduit portion 12c of the probe case 12 passed through the outer surface hole 26a. 2
6 by being screwed to the connection port 23 of the pipe joint 2 while holding down the upper surface.

The specific dimensions of the in-pipe temperature measuring sensor 1 according to the present invention described above are a plurality of types of fittings that are substantially uniform with each size of the commercially available pipe joint 2 made of a chemical liquid fluorocarbon resin. Have a size.

A sensor 1 for measuring the temperature in a pipe according to the present invention.
Has a specific form as described above, and this operation mode will be described below. When the sensor 1 for measuring the temperature in a pipe of the present invention is attached to the pipe joint 2, FIG.
, The sensor mounting nut 2 of the pipe joint 2
6 is removed from the end of the lead wire 13 of the in-pipe temperature measuring sensor 1 and passed through the outer surface hole 26a of the sensor mounting nut 26 to be positioned at the rear end of the second packing 28. Next, the locking surface 12 d of the locking portion 12 b of the probe case 12 is pressed against the locking step 23 c of the fitting portion 23 a of the pipe joint 2, and the sensor mounting nut 26 is tightened to the connection port 23.

At this time, since the first packing 27 and the second packing 28 are pressed forward by the sensor mounting nut 26, as shown in the enlarged view of FIG. Due to the taper of the packing base surface 12e of the packing base 12b, the second packing 28
Are pushed out in the lower outer peripheral direction by the taper of the first packing 27, and the sealing performance is further improved. Of course, by tightening the sensor mounting nut 26, the inner peripheral end surfaces of the first packing 27 and the second packing 28 are also pushed out to the probe case 12 and are brought into close contact with each other, so that the sealing property is improved. When the in-pipe temperature measurement sensor 1 is set as described above, the probe 11 is located at a measurement optimum position of the fluid passage 24. In the present embodiment, as an example, the fluid passage of the pipe joint 2 is used. 24 is located approximately at the center of the cross section.

As described above, the pipe H is connected to both ends of the pipe joint 2 to which the pipe temperature measuring sensor 1 is attached.
Since the sensor 1 for measuring the temperature in the pipe is set at a position where the sensor 1 for measuring the temperature in the pipe does not interfere with the pipe H, the upper surface of the chemical liquid tank T and the like are neat, and no extra installation space is required.

The mode of use will be described.
Since the temperature immediately before use can be measured, for example, by performing feedback control of a heater or the like based on the measured value, the chemical liquid L can be supplied at a more accurate temperature according to the purpose of use.

<Embodiment 2> FIG. 4 shows an embodiment in which a pipe H is connected using a pipe temperature measuring sensor A provided with a pipe means according to the present invention, and the temperature is measured at this point. It shows the form of. That is, in the first embodiment, the embodiment in which the pipe temperature measuring sensor 1 is connected to a commercially available pipe joint 2 has been described. In the second embodiment, the pipe temperature measuring sensor 1 is connected to the pipe temperature measuring sensor 1 in advance. It is provided as a finished product having the joint 2. In addition, as shown in the enlarged view of FIG. 4, the assembling structure of the sensor 1 for measuring the temperature in the pipe to the pipe joint 2 adopts the connecting structure as shown in the above-described first embodiment, but other various connecting structures It is also possible to modify it. The probe 11 is located substantially at the center of the fluid passage 24 of the pipe joint 2. Both ends of the pipe joint 2 are formed in a tube shape, and are connected to another pipe H via a pipe connection nut 25.

[0032]

According to the sensor for measuring the temperature in a pipe according to the first aspect, the probe case covers the vicinity of the probe.
A probe cover 12a for covering the probe 11 and a fitting portion 23 at the connection port 23 of the pipe joint at the rear thereof.
a, and a sensor 1 for measuring the temperature in the pipe is provided not on the chemical liquid tank T but on the pipe.
Is attached, there is no protrusion on the upper part or side part of the chemical liquid tank T, so that the temperature measurement sensor does not hinder the installation and it cannot be installed. Then, the sensor 1 for measuring the temperature in the pipe can be mounted at an optimum place where the sensor 1 for measuring the temperature in the pipe does not interfere. Further, since it is not necessary to consider attaching a temperature measurement sensor, the degree of freedom in design is increased, and it is possible to flexibly cope with diversification of devices. Further, the temperature immediately before the point of use can be measured, and more accurate temperature measurement can be performed. Further, since the temperature measuring sensor 1 in the pipe is locked at the locking portion 12b of the probe case 12, the position of the probe 11 can be easily set at a predetermined position, and the mounting cost can be reduced. Become.

According to the sensor for measuring the temperature in a pipe according to the second aspect, since at least the probe case 12 is formed of a fluororesin, it is excellent in chemical resistance and heat resistance.

According to the third embodiment of the present invention, at least the probe cover portion 12a of the probe case 12 is formed integrally and has no fluid permeation hole. A highly permeable fluid does not permeate through the probe case 12 through the probe case 12.

According to the sensor for measuring the temperature in the pipe according to the fourth aspect, the locking portion 12b of the probe case 12
Is a cylindrical shape, and the packing seat surface 12e is formed in a tapered surface tapering rearward, and the packing is provided behind the packing base surface 12e. Therefore, the packing is connected to the connection port of the pipe joint by the sensor mounting nut 26 or the like. By being pushed into the inside 23, it spreads in the outer peripheral direction along the tapered surface of the locking portion 12 b. Therefore, the outer end of the packing is
3 and is pressed against the inner wall surface to have excellent sealing properties.

According to the sensor for measuring the temperature in a pipe according to the fifth aspect, when the tip of the probe 11 is locked by the locking portion 12b of the probe case 12, the pipe according to the state of the fluid is provided. Since the pipe H is set at an appropriate position in the fluid passage 24 of the joint 2, no matter who sets the pipe, the pipe H according to the situation of the fluid flow rate, flow velocity, pulsation, viscosity, etc.
The measurement can be performed at an appropriate point in, the measurement accuracy is excellent, and the flow of the fluid is not obstructed.

According to the sensor for measuring the temperature in the pipe according to the sixth aspect, the locking portion 12b of the probe case 12
In the rear part, a tubular conduit part 1 covering the lead wire 13 is provided.
2c is formed, the conduit portion 12c is passed through the hole of the sensor mounting nut 26, and the sensor mounting nut 26 is fastened to the connection port 23 of the pipe joint while the packing is pushed in by the sensor mounting nut 26. Therefore, the structure of the commercially available piping joint can be used as it is, and the packing is pushed in by the sensor mounting nut 26, so that the sealing performance is enhanced.

According to the sensor for measuring the temperature in the pipe according to the seventh aspect, when the fluid is the chemical liquid L, since the standard of the pipe H of the chemical liquid L is particularly uniform, the main body 20 of the commercially available pipe joint can be used. In addition, it is possible to easily and inexpensively configure the sensor 1 for measuring the temperature in the pipe so that the sensor mounting nut 26 can be used as it is.

According to the sensor for measuring the temperature in the pipe having the piping means according to the eighth aspect, the sensor 1 for measuring the temperature in the pipe is mounted not on the chemical tank T but on the pipe. When the temperature sensor is installed, the temperature measurement sensor does not hinder the installation. Then, the sensor 1 for measuring the temperature in the pipe can be mounted at an optimum place where the sensor 1 for measuring the temperature in the pipe does not interfere. Further, since it is not necessary to consider attaching a temperature measurement sensor, the degree of freedom in design is increased, and it is possible to flexibly cope with diversification of devices. Further, the temperature immediately before the point of use can be measured, and more accurate temperature measurement can be performed. Further, since the temperature measuring sensor 1 in the pipe is locked at the locking portion 12b of the probe case 12, the position of the probe 11 can be easily set at a predetermined position, and the mounting cost can be reduced. Become. Further, since the pipe joint 2 is provided in advance, it becomes possible to mount the pipe joint 2 on the site very easily.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment in which a pipe temperature measuring sensor according to the present invention is attached to a pipe joint to measure the temperature of a chemical solution in a pipe, and a portion where the pipe temperature measuring sensor is attached is enlarged. It is an exploded perspective view shown as.

FIG. 2 is a vertical sectional front view showing a place where the temperature measuring sensor in the pipe is attached, and a vertical sectional front view showing an operation state of these packings by enlarging a place of a first packing and a second packing.

FIG. 3 is a longitudinal sectional front view showing a state in which a sensor for measuring the temperature in a pipe is attached to two types of pipe joints having different shapes of locking steps.

FIG. 4 is a front view showing an embodiment in which a pipe temperature measuring sensor provided with a pipe means is connected to a pipe to measure the temperature of a chemical solution in the pipe, and a place where the pipe temperature measuring sensor is attached. FIG. 4 is an enlarged longitudinal sectional view.

FIG. 5 is a front view showing a mode of measuring the temperature of a chemical solution in a conventional drug device and a partially enlarged view of a temperature measuring sensor.

[Explanation of symbols]

 Reference Signs List 1 Sensor for measuring temperature in pipe 1 'Sensor for measuring temperature (conventional device) 10 Sensor unit 11 Probe 12 Probe case 12a Probe cover 12b Locking portion 12c Conduit portion 12d Locking surface 12e Packing seat surface 13 Lead wire 14 Lead wire Tube 2 Piping joint 20 Main body 21 Connection port 22 Connection port 23 Connection port 23a Fitting section 23b Measuring section 23c Lock step 24 Fluid passage 25 Piping connection nut 26 Sensor mounting nut 26a Outer surface hole 27 First packing 27a Tip surface 27b Rear End surface 28 Second packing 28a Front end surface 28b Rear end surface 28 'Packing (conventional device) 29 Sealing tube A Sensor for measuring the temperature in the piping provided with piping means H Piping L Chemical liquid T Chemical liquid tank T1 Top cover T2 Penetrating connector (Conventional equipment)

Claims (8)

[Claims] 1. A temperature measuring sensor comprising a probe for detecting a temperature, a lead wire connected to the probe, and a probe case for covering the vicinity of the probe, wherein the temperature measuring sensor is a pipe connecting pipes. The probe case is attached to a joint and measures a temperature of a fluid flowing in the pipe. The probe case is locked at a probe cover part covering a probe and a fitting part at a connection port of the pipe joint at the rear of the probe case. A sensor for measuring a temperature in a pipe, comprising a locking portion. 2. The sensor according to claim 1, wherein at least the probe case is formed of a fluororesin. 3. The probe case according to claim 1, wherein at least a probe cover of the probe case is formed integrally and has no fluid permeation hole.
A sensor for measuring the temperature in a pipe as described in the above. 4. The probe according to claim 1, wherein the tip of the probe is set at an appropriate position in a fluid passage of a pipe joint according to a condition of the fluid when the probe is locked by a locking portion of the probe case. The sensor for measuring the temperature in a pipe according to claim 1, 2 or 3. 5. The locking portion of the probe case has a cylindrical shape, and a rear end surface is formed in a tapered surface tapering rearward, and packing is provided on the rear end surface. The sensor for measuring the temperature in a pipe according to claim 1, 2, 3, or 4. 6. A tubular conduit portion covering the lead wire is formed at a rear portion of the locking portion of the probe case, and the conduit portion is passed through a hole of a sensor mounting nut.
The sensor for measuring the temperature in a pipe according to claim 1, wherein the sensor mounting nut is fastened to a connection port of the pipe joint in a state where the packing is pushed in by the sensor mounting nut. . 7. The sensor for measuring a temperature in a pipe according to claim 1, wherein the fluid is a chemical solution. 8. A sensor for measuring the temperature in a pipe, comprising: a pipe joint for connecting a pipe; and a sensor for measuring a temperature in the pipe, which is mounted so that a probe for detecting a temperature faces a fluid passage of the pipe joint. Wherein the probe is covered with a probe case, and the probe case is provided with a locking portion for locking the probe so as to be positioned at an optimum position of the fluid passage of the pipe joint. A sensor for measuring the temperature in a pipe provided with means.