JP3212236B2 - Adsorbent water absorption state detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic zeolite sealed in an equipment container to suppress the amounts of water and decomposition gas contained in SF ₆ gas in, for example, SF ₆ gas insulated equipment. The present invention relates to a device for detecting the state of water absorption of an adsorbent, which can easily detect the state of water absorption of the adsorbent as described above.

[0002]

2. Description of the Related Art Generally, in a gas insulated device such as an SF ₆ gas insulated device in which an insulating gas is sealed in the inside of the device to maintain insulation characteristics, moisture contained in the insulating gas and decomposition of the gas are included. Since the amount of gas greatly affects the insulation properties of the equipment, it is necessary to keep it within the control value. For this reason, an adsorbent is stored in each device, and by adsorbing the water and the decomposition gas, the amount of the water and the decomposition gas contained in the insulating gas is controlled so as not to exceed the control value. .

Therefore, at the time when these adsorbents are stored in the equipment, it is necessary to sufficiently inspect the water absorption state and store the adsorbents having the lowest possible water content in the equipment. As one method of indicating the state of water absorption of these adsorbents, blue silica gel using cobalt chloride as a color indicator for sensation is generally commercially available and well known. The silica gel is shipped as a product that is a mixture of particles impregnated with cobalt chloride as an indicator that exhibits a blue color in a dry state and a pink color in a moisture-absorbed state, and particles that do not contain cobalt chloride.

[0004] In such a silica gel, the water vapor pressure at a relative humidity RH of 30% at 20 ° C is given by (17.5 × 0.30) / 760 ×, where the saturated water vapor pressure at 20 ° C. is 17.5 mmHg. 10 ⁶ = 6900 ppm (vol). Therefore, for example, 0.6 MPa filled SF ₆
For gas-insulated equipment, the value is 6900/6 = 1150 ppm (vol). This value is referred to as “Electric Cooperative Research Vol.
4 "in (1977 October), the management value 300ppm shown as SF ₆ gas-insulated equipment maintenance criteria (vo
It greatly exceeds 1) and is not suitable for use in SF ₆ gas insulated equipment.

[0005] From such a point, a synthetic zeolite is used which has a low moisture content in the SF ₆ gas and also has excellent adsorption characteristics of the decomposition gas. This synthetic zeolite can maintain a water concentration of 0.1 (mmHg) / 760 × 10 ⁶ = 132 ppm (vol) under atmospheric pressure even if it absorbs 15 wt% at 25 ° C., and is filled with 0.6 MPa. SF
_{In a 6} gas atmosphere, the water concentration can be maintained at 132/6 = 22 ppm (vol), which is suitable for use in SF ₆ gas insulating equipment.

However, since the water content of the synthetic zeolite cannot be visually judged from the outside, it is necessary to open the package once, take out a part of it, and detect it by a measuring method described later. If not, there is a concern that synthetic zeolite having a high water content may be accidentally stored in the equipment.

That is, in order to measure the water absorption of the adsorbent, in principle, the adsorbent is heated to 200 ° C. or higher, and the water released at this time is collected by a P ₂ O ₅ trap, and the weight increase is measured. The water-containing state can be known from the ratio of the weight of the collected water to the weight of the adsorbent in the dry state, that is, the water absorption.
Similarly, it is possible to use a commercially available moisture meter. For example, in the case of a device used in an SF ₆ gas atmosphere, it is necessary to remove SF ₆ as a pretreatment. Although it is easy at a well-equipped laboratory level, the work becomes complicated when measurement is performed at an installed site, for example, in an SF ₆ gas insulating device.

[0008] For measuring the moisture content in the SF ₆ gas insulation equipment, for example, a dew-point-type moisture meter can be used. In this case, this moisture meter is connected to the SF ₆ gas inflow / outlet of the device, a part of the inflowing / outflowing SF ₆ gas is directly introduced into the moisture meter, and the amount of moisture contained in the SF ₆ gas is detected. It is possible to know whether or not the adsorbent is working effectively, but it takes a long time to reach an equilibrium state where the effect of the adsorbent appears.

[0009]

Heretofore, as a method for detecting the water absorption state of an adsorbent, despite the fact that there is no humidifier in place of cobalt chloride-impregnated silica gel, this method uses SF _6.
Can not be used greatly exceeds the management value of the gas insulated equipment maintenance standards, when the apparatus is once opened to the atmosphere at the time of inspection, the synthetic zeolite which falls within the management value of the SF ₆ gas-insulated equipment maintenance criteria each time The renewal is very uneconomical, and when a commercially available moisture meter is used, the work at the installation site is complicated and takes a long time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a water absorbing state of an adsorbent which is economical and can easily detect the water absorbing state of an adsorbent even at the installation site of equipment. It is an object to provide a detection device.

The adsorbent according to claim 1 of the present invention has a water absorbing property.
The state detection device includes a container having a predetermined volume,
A thin tube connected to one end side and having an opening formed at the tip, and a container
Connected to the container by suction and through the opening of the capillary
A suction device that sucks gas into the
Moisture detector that detects moisture contained in
Moisture concentration indicating the concentration of moisture detected by the moisture detector
An indicator is provided, and the tip of the thin tube is
In the device for detecting the state of water absorption of the adsorbent inserted inside
The storage container has a water permeable property when detecting the water absorption state of the adsorbent.
It is covered with a small sheet.

Further, the adsorbent according to claim 2 of the present invention has a high absorption capacity.
The water condition detecting device includes a container having a predetermined volume,
A thin tube connected to one end of the vessel and having an opening at the tip,
Connected to the container and through the opening of the capillary by suction
A suction device that sucks gas into the container, and a suction device that is housed in the container.
A moisture detector for detecting moisture contained in the gas entered,
Moisture indicating the concentration of moisture detected by this moisture detector
A device for detecting the state of water absorption of an adsorbent, which is equipped with a concentration indicator
The container and the thin tube are made of a metal member and have at least an inner surface.
It has been smoothed.

[0013] Further, water absorption state detection device of the adsorbent according to the third aspect of the present invention, in claim 1, the adsorbent is obtained by applying a synthetic zeolite.

Further, in the device for detecting the state of water absorption of an adsorbent according to claim 4 of the present invention, the zeolite may be S
It is intended to be used in an F ₆ gas atmosphere.

According to a fifth aspect of the present invention, there is provided an adsorbent water absorption state detecting apparatus according to the first or second aspect.
The thin tube is detachable from the container.

Further, according to a sixth aspect of the present invention, there is provided an apparatus for detecting a state of water absorption of an adsorbent according to the first or second aspect.
The suction device is formed in a dropper shape by a flexible member, and is configured to suck and discharge gas into and from the container by expansion and contraction of the operation unit.

According to a seventh aspect of the present invention, in the adsorbent water absorbing state detecting apparatus according to the sixth aspect , the extending direction of the operating portion is free to the container.

[0018]

The water absorption state of the adsorbent according to claim 1 of the present invention.
The detector is located inside the container from the opening at the tip of the thin tube by the suction device.
The gas contained in this gas is inhaled by a moisture detector.
And the water concentration is displayed.
And insert the tip of the capillary into the adsorbent to
Introduce a gas that is almost in equilibrium with the adhesive into the container,
When the condition is detected, cover the storage container with a sheet with low moisture permeability.
To prevent the effects of wind.

Further, the adsorbent according to claim 2 of the present invention
Water absorption state detection device smoothes inner surfaces of containers and thin tubes
This prevents moisture from adsorbing on the inner surface.

In the apparatus for detecting a state of water absorption of an adsorbent according to a third aspect of the present invention, the tip of a thin tube is inserted into a synthetic zeolite, and a gas substantially in equilibrium with the synthetic zeolite is introduced into the container.

According to a fourth aspect of the present invention, there is provided an apparatus for detecting a state of water absorption of an adsorbent, wherein a tip of a thin tube is inserted into a synthetic zeolite so as to be substantially in equilibrium with the synthetic zeolite.
The F ₆ gas is introduced into the container.

Further, in the apparatus for detecting the state of water absorption of an adsorbent according to the fifth aspect of the present invention, a thin tube having a size corresponding to the condition of a measuring point can be applied by making a thin tube detachable from a container. .

Further, in the device for detecting the state of water absorption of an adsorbent according to claim 6 of the present invention, gas is sucked into and discharged from a container by expansion and contraction of an operation unit.

Further, in the device for detecting a state of water absorption of an adsorbent according to claim 7 of the present invention, the operability is facilitated by making the extending direction of the operating portion freely with respect to the container.

[0025]

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a device for detecting a state of water absorption of an adsorbent in Embodiment 1 of the present invention, and FIG. 2 is a diagram showing a state of use of the device for detecting a state of water absorption of an adsorbent in FIG. In the drawing, reference numeral 1 denotes a container having a predetermined volume, and 2 denotes a thin tube connected to one end of the container 1 and having an opening 2a formed at the tip.
The thin tube 2 is made of, for example, a metal member such as stainless steel, and the inner surface is smoothed by, for example, mirror finishing.

Reference numeral 3 denotes a suction device connected to the other end of the container 1 and formed in a dropper shape by a flexible member. By expanding and contracting the operating portion 3a, gas is sucked into the container 2 from the opening 1a of the thin tube 1. Discharge. Reference numeral 4 denotes a moisture detector for detecting the moisture contained in the inhaled gas contained in the container 1; 5, a moisture concentration indicator for displaying the concentration of moisture detected by the moisture detector 4; and 6, a SF ₆ gas. 7 is attached to the inner wall of the SF ₆ gas-insulated equipment, and 8 is attached to the inner surface of the inner wall.
A storage container filled with particles 9 of synthetic zeolite as an adsorbent, and a plurality of holes 8a through which the thin tube 2 can penetrate are provided in the vessel wall.

Next, a detection operation using the adsorbent water-absorbing state detecting device according to the first embodiment configured as described above will be described. First, in a state where SF ₆ gas 7 in the SF ₆ gas insulated equipment has been recovered and replaced with the atmosphere by internal inspection and the like,
As shown in FIG. 2, the thin tube 2 is inserted through the hole 8 a of the storage container 8 and inserted, and the opening 2 a is positioned at the center of the layer of the synthetic zeolite particles 9. Next, by extending the operating portion 3a of the suction device 3, the gas substantially at the center of the layer of the synthetic zeolite particles 9 is sucked into the container 1 and replaced with the residual gas in the container 1. Then, the moisture contained in the gas replaced in the container 1 is detected by the moisture detector 4, and the detected concentration of the moisture is displayed on the moisture concentration display 5.

As described above, according to the first embodiment, the thin tube 2
Of the synthetic zeolite particles 9 filled in the storage container 8 is positioned substantially at the center of the layer, and a gas substantially in equilibrium with the synthetic zeolite particles 9 in this portion is introduced into the container 1 to remove water. Since the detection is performed, the water absorption state of the synthetic zeolite can be easily and accurately detected.

Further, by adopting the above configuration,
Even if a synthetic zeolite is used, the state of water absorption can be easily detected, so that it can be applied to the management of SF ₆ gas insulation equipment maintenance standards, and can be used even in an atmosphere where SF ₆ gas remains. Become.

Further, since the container 1 and the thin tube 2 are formed of a metal member and the inner surface is smoothed, it is difficult for moisture to be adsorbed to the inner surface, and even if it is adsorbed, it is easily released. All of the water introduced from the thin tube 2 can be detected, and accurate detection of the water is possible.

Further, since the suction device 3 is formed of a flexible member, and the extending direction of the operation portion 3a is free relative to the container 1,
For example, from the state shown in FIG. 1 to the state shown in FIG. 2, the extending direction of the operation unit 3a can be changed depending on the detection state, so that the workability can be improved, and the flexible member can be used as a dropper. Therefore, the gas in the container 1 can be easily replaced with a simple structure.

Embodiment 2 FIG. According to the first embodiment, the case where the container 1 and the thin tube 2 are integrated has been described. However, as shown in FIG. By making it detachable with respect to, it is possible to exchange with a different size, for example, when the storage container in which the particles of synthetic zeolite are stored is made of a cloth bag,
Although a thin tube having a smaller dimension is required, it is possible to cope with such a case.

Embodiment 3 FIG. FIG. 4 is a diagram showing a usage state of the adsorbent water absorption state detecting device according to the third embodiment of the present invention. In the figure, the same parts as those in the first embodiment shown in FIG. Reference numeral 12 denotes a sheet member made of a member having low moisture permeability such as a vinyl resin, and is provided so as to cover the storage container 8.

As described above, according to the third embodiment, the storage container 8 is formed by the sheet member 12 made of a member having low moisture permeability.
When performing outdoor work on site, even if wind is blowing, it is possible to accurately detect the water absorption state without being affected by the wind.

Embodiment 4 FIG. In each of the above embodiments, the display of the moisture concentration indicator 5 was not described in detail, but the moisture concentration may be indicated by, for example, a dew point. In this case, at a dew point of −50 ° C., the water absorption rate becomes close to 13 wt% at an ambient temperature of 25 ° C., which is inappropriate when considering the temperature rise due to the operation of the equipment. However, at a dew point of −70 ° C., the water absorption rate is 6 wt%. % Or less, which is a sufficient state in consideration of the temperature rise due to the operation of the equipment. In this case, it can be determined that the adsorbent can be continuously used.

[0036]

As described above, according to the first aspect of the present invention,
Then, a container having a predetermined volume and one end of the container
Connected to a capillary with an opening at the tip and a container
Gas into the container through the opening of the capillary
Aspirator for inhaling gas, and gas inhaled contained in a container
Moisture detector for detecting moisture contained in water and this moisture detection
And a moisture concentration indicator that displays the concentration of moisture detected by the instrument.
The tip of the thin tube is inserted inside the adsorbent layer inside the storage container.
In the device for detecting the state of water absorption of the adsorbent
Containers with low water permeability when detecting the water absorption state of the adsorbent
To be economical and to install equipment.
It is possible to easily detect the water absorption state of the adsorbent even in the field
Of course, more accurate detection of water absorption is possible
Water absorption that is accurate and not affected by wind
To provide an adsorbent water absorption state detection device capable of detecting water.
Can be.

According to a second aspect of the present invention, the predetermined
A container having a volume and a tip connected to one end of the container;
A small tube with an opening formed in
To suck gas into the container through the opening of the capillary.
Water contained in 引器and gas that is inhaled is contained within a container
And a moisture detector that detects the minute
With a moisture concentration indicator that displays the concentration of moisture
In the device for detecting the state of water absorption of the agent,
Since it is a member and at least the inner surface is smoothed,
It is economical and easily absorbs adsorbent even at the installation site of equipment
State of adsorbent that can detect the condition more accurately
A sensing device can be provided.

According to claim 3 of the present invention,
In 1 , because the adsorbent applied synthetic zeolite,
It is possible to provide an adsorbent water absorption state detection device that can be used even in an atmosphere in which SF ₆ gas remains.

According to a fourth aspect of the present invention, in the third aspect, the zeolite is used in an SF ₆ gas atmosphere, so that the zeolite can be applied within the control value of the SF ₆ gas insulation equipment maintenance standard. An apparatus for detecting a state of water absorption of an adsorbent can be provided.

According to claim 5 of the present invention,
In the first or second aspect, since the thin tube is detachable from the container, it is economical and can easily detect the water absorption state of the adsorbent even at the installation site of the apparatus. It is possible to provide an adsorbent water absorption state detecting device capable of improving the water absorbing property.

According to claim 6 of the present invention,
In the first or second aspect, the suction device is formed in a dropper shape by a flexible member, and the suction and discharge of the gas into and from the container is performed by the expansion and contraction of the operation portion. Therefore, the suction device is economical and easily sucked even at the installation site of the device. As a matter of course, it is possible to provide an adsorbent water-absorbing state detecting device that can detect the water-absorbing state of the agent and that can replace the gas in the container with a simple structure.

According to claim 7 of the present invention, claim
In 6 , since the extending direction of the operation unit is made freely with respect to the container, it is possible to provide an adsorbent water absorption state detecting device capable of improving workability.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a device for detecting a state of water absorption of an adsorbent in a first embodiment of the present invention.

FIG. 2 is a diagram showing a use state of the adsorbent water absorption state detecting device in FIG.

FIG. 3 is a sectional view showing a main part of a device for detecting a state of water absorption of an adsorbent in a second embodiment of the present invention.

FIG. 4 is a diagram illustrating a state of use of a device for detecting a state of water absorption of an adsorbent according to a third embodiment of the present invention.

[Explanation of symbols]

1,11 container, 2,10 capillary, 2a, 10a opening, 3 aspirator, 3a operation section, 4 moisture detector, 5
Moisture concentration indicator, 8 container, 8a hole, 9 particles of synthetic zeolite (adsorbent), 12 sheet members.

──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Takeo Yoshioka 8-1-1, Tsukaguchi Honcho, Amagasaki City Mitsubishi Electric Corporation Itami Works (72) Inventor Hiroyuki Hirakawa 8-1-1, Tsukaguchi Honmachi, Amagasaki City Mitsubishi Inside the Itami Works of Electric Machinery Co., Ltd. (72) Yoshinobu Numa 8-1-1, Tsukaguchi-Honmachi, Amagasaki City Mitsubishi Electric Corporation Itami Works (56) References JP-A-55-147123 (JP, A) JP-A-56-129041 (JP, A) JP-A-5-126773 (JP, A) JP-A-56-168819 (JP, A) Japanese Utility Model Application No. 57-155473 (JP, U) Japanese Utility Model Application No. 57-155472 (JP) , U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G01N 25/56 B01J 20/18

Claims (7)

(57) [Claims] 1. A container having a predetermined volume and a container
A thin tube connected to one end and having an opening at the tip,
Connected to the container and sucked through the opening of the capillary
A suction device for sucking gas into the container and
To detect the moisture contained in the inhaled gas
Moisture detector and the moisture concentration detected by the moisture detector.
A moisture concentration indicator for indicating the degree, and a tip of the capillary.
Is the adsorbent inserted inside the adsorbent layer in the storage container
In the water absorption state detecting device of the above,
Cover with a sheet with low moisture permeability when detecting the water absorption state of the agent
Device for detecting the state of water absorption of an adsorbent, characterized in that
Place. 2. A container having a predetermined volume, and a container
A thin tube connected to one end and having an opening at the tip,
Connected to the container and sucked through the opening of the capillary
A suction device for sucking gas into the container and
To detect the moisture contained in the inhaled gas
Moisture detector and the moisture concentration detected by the moisture detector.
Water absorption state of the adsorbent equipped with a moisture concentration indicator that indicates the degree
In the state detection device, the container and the thin tube are metal parts.
And that at least the inner surface is smoothed.
A device for detecting the state of water absorption of the adsorbent. 3. The method according to claim 1, wherein the adsorbent is a synthetic zeolite.
The device for detecting the state of water absorption of an adsorbent according to claim 1. 4. The synthetic zeolite is prepared in an SF ₆ gas atmosphere.
4. The adsorbent according to claim 3, wherein the adsorbent is used.
Water condition detection device. 5. The thin tube is detachable from the container.
The adsorbent according to claim 1 or 2, characterized in that:
Water absorption state detection device. 6. The suction device is formed in a dropper shape by a flexible member.
The gas is sucked into and discharged from the container by the expansion and contraction of the operation unit
The adsorption according to claim 1 or 2, characterized in that:
A device for detecting the state of water absorption of the agent. 7. An extending direction of the operation section is freely with respect to the container.
7. The state of water absorption of the adsorbent according to claim 6, wherein
Detection device.