JPH0114905Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a mounting device for a flow-through meter used for process monitoring on process piping and tanks of various plants, and in particular, this invention relates to a mounting device for a flow-through meter used for process monitoring on process piping and tanks of various plants. This invention relates to improvements in instrument chambers used to connect to tanks, etc.

At power plants, chemical plants, and the like, water quality and other properties of various fluids handled are analyzed in order to monitor processes. However, such analytical instruments include conductivity meters, dissolved oxygen meters, PH meters, dew point meters, etc., and these instruments usually have their detection ends inserted directly into process piping or tanks. However, in many cases, piping with a smaller diameter than the above piping or tank is branched off for sample analysis.
In such a case, it becomes difficult to directly insert the detection end of the meter into the small-diameter pipe. Therefore, in the past, a chamber for an instrument has been used as a means for making the detection end of the instrument fit well with the small-diameter piping and bringing the fluid into contact with the detection end in an optimal state.

That is, conventional instrument chambers of this type have a tube body with a diameter suitable for the instrument detection end, and one end of this tube body is provided with a fluid inlet to connect to the sample piping, and the other end is provided with a fluid inlet for connecting the instrument detection end. It has a configuration in which a fluid outlet is provided adjacent to the detection end insertion port, and the instrument detection end insertion port requires maintenance of the instrument, so a flange, tapered screw, or cap nut is used. The instrument and chamber are configured to be detachable.

For example, FIG. 1 shows a conventional flange-coupled instrument chamber, in which reference numeral 10 is a tube body, 12 is a fluid inlet, 14 is a fluid outlet, and 16 is a fluid outlet.
1A and 1B respectively show meter detection end insertion ports, and a coupling flange 18 is provided at the opening of the meter detection end insertion port 16. When configured in this way, when attaching and detaching the instrument to the chamber, use a spanner or wrench and usually
~ It is necessary to prepare six bolts and nuts and operate them one by one, which has the drawback of requiring an extremely long working time and a lot of labor.

Furthermore, FIG. 2 shows a conventional tapered thread type instrument chamber, which includes a pipe body 10 and a fluid inlet 12 similar to the instrument chamber shown in FIG.
, a fluid outlet 14 , and a meter detection end insertion port 16 , and a tapered threaded portion 20 is provided at the opening of the meter detection end insertion port 16 . In the instrument chamber configured in this manner, when attaching and detaching the instrument and the chamber, a spanner is used and a sealing material is applied to the threaded portion 20.
Not only is it time-consuming to apply or remove the sealant from the sealant, but it also requires a large amount of force to attach and detach.

As described above, the conventional instrument chamber has the drawback that it requires a lot of manual effort and labor when attaching and detaching the instrument, prolongs the working time, and extremely degrades the working efficiency. For this reason, especially when handling fluids that are harmful to the human body, leakage of harmful substances may occur, which is accompanied by many dangers.Therefore, it is desirable to develop a chamber for instruments that can be quickly and reliably attached to and detached from instruments. It was rare.

Therefore, as a result of various studies to overcome all the problems of the conventional instrument chamber mentioned above, the inventor of the present invention divided the tube body constituting the instrument chamber into two pieces on the instrument detection end insertion port side and joined them together. The pipe body is constructed so that it can be separated, and the joint peripheral edge of the two divided tubes projects in a tapered shape, and a clamp band is arranged around these tapered projections, and the clamp band is tightened at one end via a screw tool. It has been found that the above problems can be solved by doing so.

Therefore, the purpose of the present invention is to develop a flow-through type instrument chamber that is used to attach the detection end of a flow-through type meter to a part of various sample piping, and which allows easy and safe attachment and detachment of the meter and the chamber. To provide an instrument chamber.

In order to achieve the above object, the present invention consists of a tube body equipped with a fluid inlet at one end, a meter detection end insertion port at the other end, and a fluid outlet adjacent to this insertion port, In this flow-through type instrument chamber in which a meter is removably attached to the meter detection end insertion port of the tube, a part of the tube forming the meter detection end insertion port is divided into two in the axial direction, and the divided The present invention is characterized in that tapered protrusions are provided on the outer peripheral edge of the jointed tube body, and these protrusions are detachably surrounded and fixed by a clamp band.

In the above-mentioned flow-through type instrument chamber, the clamp band is configured to be able to be opened and closed by pivotally connecting the curved members, and is attached to the tapered protrusion formed at the joint of the tube body through screws at both ends. It is preferable to configure it so that it can be releasably tightened and fixed. Also,
It is preferable that one of the split tubes that is directly connected to the meter be configured to have a tapered threaded portion in the meter detection end insertion port so as to be connected to the meter. In addition, it is more preferable to connect the joint surfaces of the split tube bodies liquid-tightly via an O-ring.

Next, embodiments of the chamber for a flow-through type instrument according to the present invention will be described in detail below with reference to the accompanying drawings.

FIGS. 3 and 4 show an embodiment of a flow-through type instrument chamber according to the present invention. That is, in FIG. 3, reference numeral 30 indicates a tube body. This pipe body 30 is made up of a main pipe part 34 having a fluid inlet 32 at one end, and instrument detection end insertion pipe parts 36 and 38 which are connected to the other end of this main pipe part 34 and are divided into two in the axial direction. configured. However, one of the meter detection end insertion pipe portions 36 forms a meter detection end insertion port 40 and has a tapered threaded portion 42 carved into the opening of this insertion port 40 for coupling a meter. Further, the other meter detection end insertion tube portion 3
8 is provided with a fluid outlet 44 on one side thereof and is joined to the other end of the main pipe section 34 by means such as welding.

Further, the meter detection end insertion tube portion 3 of the tube body 30
6 and 38 are liquid-tightly joined via an O-ring 46, and tapered protrusions 48 and 50 are provided on the outer periphery of the joint, respectively. The joint between the tapered protrusions 48 and 50 constructed in this way is configured to be clamped and clamped by a curved clamp band 52 whose one end is pivotally connected and can be opened and closed (see FIG. 4). That is, the clamp band 52
The instrument detection end insertion tube portions 36, 38 are provided on the inner circumferential surface.
Tapered protrusions 48, 5 provided on the outer peripheral edge of the joint
The clamp band 52 has a concave groove 54 into which a screw can be inserted, and screws 56 that can be tightened are detachably attached to both ends of the clamp band 52. 3 and 4, in the clamp band 52 of this embodiment, the screw 56 has one end of a screw shaft 58 pivotally connected to one end of the clamp band 52, and the other end of the clamp band 52. The butterfly nut 62 is inserted into the cut groove 60 and screwed from the other end of the screw shaft 58, and by rotating the butterfly nut 62, both ends of the clamp band 52 are brought closer together, and the instrument is connected. The detection end insertion tube portions 36 and 38 are configured to be clamped and clamped.

As is clear from the embodiments described above, the flow-through type instrument chamber according to the present invention has a structure in which a part of the tube forming the instrument detection end insertion port is divided, and the instrument is liquid-tightly installed in the divided tube in advance. This split tube body can be easily joined with a clamp band by abutting the tube body connected and fixed to the other sample pipe or the like. Moreover, this clamp band has 1
Since it can be easily tightened or released by operating a screw at a certain point, attachment and detachment work can be accomplished in a short time during maintenance of the instrument. Therefore, the instrument chamber according to the present invention reduces radiation exposure time and has excellent safety, especially when handled in a radioactive atmosphere at a nuclear power plant. In addition, even during frequent instrument maintenance work, O-rings are used on the joint surfaces of the split tubes, so durability can be maintained, and there is no need to replace parts, improving work efficiency and providing economic benefits. There are also many. Furthermore, in the above-described embodiments, the chamber is constructed as an independent structure, but it goes without saying that it can be constructed integrally with the flow-type meter in advance.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various improvements and changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional side view of the main part of a conventional flange-connected flow-through instrument chamber, Figure 2 is a cross-sectional side view of the main part of a conventional tapered screw-connection flow-through instrument chamber, and Figure 3 is a main part cross-sectional side view of a conventional flange-connection flow-through instrument chamber. FIG. 4 is a cross-sectional side view of a main part showing an embodiment of the flow-through type instrument chamber according to the invention; FIG. 4 is a side view of the meter detection end insertion port side of the flow-through type instrument chamber shown in FIG. 3; DESCRIPTION OF SYMBOLS 10...Pipe body, 12...Fluid inlet, 14...Fluid outlet, 16...Meter detection end insertion port, 18...Coupling flange, 20...Tapered thread part, 30...Pipe body, 32
...Fluid inlet, 34...Main pipe part, 36, 38...Meter detection end insertion tube part, 40...Detection end insertion port, 42...Tapered thread part, 44...Fluid outlet, 46...O ring, 48, 50...Taper 52...Clamp band, 54...Concave groove, 56...Screw tool, 58...Screw shaft, 60...Groove portion, 62...Butterfly nut.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a tube body with a fluid inlet at one end, an instrument detection end insertion port at the other end, and a fluid outlet adjacent to this insertion port; In a flow-through type instrument chamber in which a meter is removably attached to the instrument detection end insertion port of the body, a part of the tube forming the instrument detection end insertion port is divided into two in the axial direction, and the divided A chamber for a flow-through type instrument comprising tapered protrusions provided on the outer periphery of a joint of a tube body, and these protrusions are detachably surrounded and fixed with a clamp band. (2) In the flow-through instrument chamber described in claim 1 of the utility model registration claim, the clamp band is
The curved members are pivotally connected to each other so that they can be opened and closed freely,
A chamber for a flow-through type instrument configured to be removably tightened to a tapered protrusion formed at a joint of a tube body via screws at both ends. (3) In the flow-through meter chamber described in claim 1 or 2 of the utility model registration claim, one of the split tubes that is directly connected to the meter has a tapered threaded portion in the meter detection end insertion opening. A flow-through type instrument chamber configured to be coupled with. (4) A flow-through type instrument chamber according to any one of claims 1 to 3 of the claims for registration of a utility model, which is formed by liquid-tightly joining the joint surface of the split tube body via an O-ring. Instrument chamber.