JP3459785B2 - Pressure receiver adapter for remote seal type transmitter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is arranged such that a pressure receiving surface of a measured side flange is in contact with a pressure receiving surface of a pressure receiving portion of a remote seal type transmitter, and a back surface thereof is in contact with the pressure receiving surface of a remote seal type transmitter. The present invention relates to a pressure receiving adapter that transmits to a pressure receiving portion, and particularly to a high corrosion resistant pressure receiving adapter that is used when measuring the pressure of a highly corrosive fluid.

[0002]

2. Description of the Related Art FIG. 5 is a pressure receiving adapter 2 of a first conventional example.
FIG. 3 is a cross-sectional view showing a state in which the pressure receiving portion 1 of the remote seal type differential pressure transmitter is attached to the device under test 9 by bolting using the fixing flange 3 and the fixing flange 3; In FIG. 5, the pressure receiving portion 1 is fixed to each other by fixing bolts 7a and 7b with its pressure receiving surface being in contact with the back surface of the pressure receiving adapter 2 and with the sealing O-ring 5 interposed therebetween. Further, the pressure receiving end composed of the pressure receiving portion 1 and the pressure receiving adapter 2 fixed to each other is such that the pressure receiving surface of the pressure receiving adapter 2 is in contact with the measured side flange 4 and the sealing gasket 6 is sandwiched between the mounting bolt 8a. , 8b are attached to the measured side flange 4. The ring-shaped O-ring groove 27 in which the O-ring 5 for sealing is housed is formed in the pressure receiving adapter 2.
Is formed at a predetermined position on the back surface of the pressure receiving portion 1, that is, a portion facing the sealing surface of the pressure receiving portion 1. The position where the sealing gasket 6 is arranged is the sealing surface of the pressure receiving surface of the pressure receiving adapter 2.

A cylindrical pressure transmission chamber 23 is provided between the outside of the diaphragm 10 of the pressure receiving portion 1 and the opposing surface of the pressure receiving adapter 2.
c is formed. The pressure transmission chamber 23c communicates with the pressure chamber 22 of the pressure receiving adapter 2 through a pair of pressure transmission passages 23a and 23b. A filling liquid such as silicone oil is injected into the pressure chamber 22, the pressure transmission passages 23a and 23b, and the pressure transmission chamber 23c through the injection passages 25a and 25b. After the injection, the injection ports 25a and 25b are closed by the sealing plugs 26a and 26b. The pressure chamber 12 of the pressure receiving portion 1 is connected to a pressure measurement chamber of a transmitter body of a remote seal type transmitter (not shown) via a pressure transmission passage 13 and a pressure transmission tube 14. These pressure chamber 12, pressure transmission path 13, and pressure transmission tube 1
A filling liquid such as silicone oil is also injected into the nozzle 4.

The pressure receiving adapter 2 of the first conventional example shown in FIG.
In order to fix this to the pressure receiving portion 1, a bolt hole 15 to be screwed into the pressure receiving portion 1 with the fixing bolts 7a and 7b.
a, 15b must be formed. Bolt hole 15
Since a and 15b have to be arranged outside the sealing surface of the pressure receiving portion 1, the body shape of the pressure receiving portion 1 is correspondingly increased and the material cost is increased. In addition, since the standard pressure receiving portion requires additional drilling processing, the processing cost also increases. In short, there is a problem in that a pressure receiving portion of a special expensive product must be prepared in addition to the standard product. Then, what was developed in order to solve this problem is the pressure receiving adapter of the 2nd prior art example shown in FIG.

FIG. 6 shows a pressure receiving adapter 2 of a second conventional example,
It is sectional drawing which shows the state which attached the pressure receiving part 1 of the standard item of a remote seal type differential pressure transmitter to the to-be-measured apparatus 9 by bolting using this and the fixing flange 3. In FIG. 6, the pressure receiving portion 1 is arranged such that its back surface is in contact with the fixing flange 3 and its pressure receiving surface is in contact with the back surface of the pressure receiving adapter 2. The sealing O-ring 5 is sandwiched between the pressure receiving surface of the pressure receiving portion 1 and the back surface of the pressure receiving adapter 2 and is arranged at a predetermined position. The pressure receiving portion 1 and the pressure receiving adapter 2 arranged as described above are fixed to the fixing bolts 7a and 7b.
It is fixed to the fixing flange 3 by. Further, the pressure receiving portion 1 and the pressure receiving adapter 2 fixed to the fixing flange 3
The pressure receiving end composed of is attached to the measured side flange 4 by mounting bolts 8a and 8b so that the pressure receiving surface of the pressure receiving adapter 2 is in contact with the measured side flange 4 and the sealing gasket 6 is sandwiched.

As is apparent from FIG. 6, when the pressure receiving adapter 2 of the second conventional example is used, it is not necessary to perform drilling for adding bolt holes to the pressure receiving portion of the standard product. Since it can be applied to the standard pressure receiving unit as it is, the problem of the first conventional pressure receiving adapter 2 applied to the special pressure receiving unit shown in FIG. 5 has been solved. However, the diameter of the main body of the pressure receiving adapter 2 of the second conventional example is larger than the diameter of the main body of the pressure receiving portion 1 of the standard product of the remote seal type transmitter, which causes a new problem. Since the pressure receiving adapter is used when measuring the pressure of a highly corrosive fluid, even a highly corrosion resistant diaphragm will corrode and become unusable for a long period of use. If this happens, you must replace the old pressure adapter with a new pressure adapter. In this case, the pressure of the fluid to be measured cannot be measured until the new pressure receiving adapter arrives at the site. In that case, the process control may be seriously hindered. Therefore, the time during which measurement is not possible should be shortened as much as possible.

In the case where the pressure receiving adapter 2 of the first conventional example is used, the time required until the replacement product arrives is taken by an emergency measure in which the pressure receiving portion 1 of the remote seal type transmitter is directly attached to the measured side flange 4. I was out of the way. This is possible because the pressure receiving adapter 2 of the first conventional example has the same diameter as the main body of the special pressure receiving portion 1. Further, it is because even if the diaphragm of the pressure receiving portion 1 is applicable to a highly corrosive fluid, it is possible to apply it to the time until the replacement product arrives. However, in the pressure receiving adapter 2 of the second conventional example, such a first aid cannot be performed because the diameter of the main body is larger than the diameter of the main body of the pressure receiving portion 1 of the remote seal type transmitter.

[0008]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is a pressure-receiving adapter which can be applied to the pressure-receiving part by making the diameter of the pressure-receiving part main body of a standard product the same, and which has a lower manufacturing cost than conventional products. It is to provide a low pressure receiving adapter.

[0009]

In order to solve the above-mentioned problems, the pressure receiving surface of the flange to be measured is arranged to contact the pressure receiving surface of the standard pressure receiving portion of the remote seal type transmitter, and the rear surface thereof contacts the pressure receiving surface. And a pressure receiving adapter which is attached to the measured side flange by a fixing flange and a bolt and which transmits the pressure of the fluid to be measured to the pressure receiving portion, the main body of which has the same diameter as the main body of the pressure receiving portion of the standard product. A member for fixing the pressure receiving portion is provided on the outer periphery of the main body. A flange member or a plurality of knobs arranged at equal intervals is used as the pressure receiving portion fixing member. Bolt holes corresponding to the fixing bolt holes provided in the fixing flange are formed in the pressure receiving portion fixing member, and the pressure receiving adapter bolts to the fixing flange with the pressure receiving portion interposed therebetween. It is fixed by tightening.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a state in which a pressure receiving portion 1 of a standard product of a remote seal type differential pressure transmitter is attached to a device under test 9 using an embodiment of a pressure receiving adapter according to the present invention. FIG. 2 is a sectional view of the pressure receiving adapter shown in FIG. 1, and FIG. 3 is a rear view thereof. 2 and 3
The structure and usage of the pressure receiving adapter of FIG. 1 will be described below with reference to FIG. The pressure receiving portion 1 is arranged such that its back surface is in contact with the fixing flange 3 and its pressure receiving surface is in contact with the back surface of the pressure receiving adapter 2. The sealing O-ring 5 is sandwiched between the pressure receiving surface of the pressure receiving portion 1 and the back surface of the pressure receiving adapter 2 and is arranged at a predetermined position. The pressure receiving portion 1 and the pressure receiving adapter 2 arranged in this manner are fixed to the fixing flange 3 by fixing bolts 7a and 7b. Further, the pressure receiving end composed of the pressure receiving portion 1 and the pressure receiving adapter 2 fixed to the fixing flange 3 is
The pressure receiving surface of the pressure receiving adapter 2 is brought into contact with the measured side flange 4, and the sealing gasket 6 is sandwiched between the pressure receiving adapter 2 and the measuring side flange 4 and the mounting bolts 8a and 8b. An annular O-ring groove 27 for accommodating the sealing O-ring 5 is formed at a predetermined position on the back surface of the pressure receiving adapter 2, that is, a portion facing the sealing surface of the pressure receiving portion 1. The position where the sealing gasket 6 is arranged is the sealing surface of the pressure receiving surface of the pressure receiving adapter 2. 2
Reference numerals 8a, 28b, 32a and 32b are fixing bolt holes, and 31a, 31b, 41a and 41b are mounting bolt holes.

A cylindrical pressure transmission chamber 23 is provided between the outside of the diaphragm 10 of the pressure receiving portion 1 and the facing surface of the pressure receiving adapter 2.
c is formed. The pressure transmission chamber 23c communicates with the pressure chamber 22 of the pressure receiving adapter 2 through a pair of pressure transmission passages 23a and 23b. A filling liquid such as silicone oil is injected into the pressure chamber 22, the pressure transmission passages 23a and 23b, and the pressure transmission chamber 23c through the injection passages 25a and 25b. After the injection, the injection ports 25a and 25b are closed by the sealing plugs 26a and 26b. The pressure chamber 12 of the pressure receiving portion 1 is connected to a pressure measurement chamber of a transmitter body of a remote seal type transmitter (not shown) via a pressure transmission passage 13 and a pressure transmission tube 14. These pressure chamber 12, pressure transmission path 13, and pressure transmission tube 1
A filling liquid such as silicone oil is also injected into the nozzle 4.

The pressure receiving adapter 2 shown in FIG. 1 to FIG.
The body 21 is connected to the pressure receiving surface side member 21a and the back surface side member 21b.
It is formed by integrally joining and with an adhesive or the like.
The pressure receiving surface side member 21a provided with the diaphragm 10 is
Like the standard pressure receiving portion 1, the pressure receiving portion 1 has a cylindrical shape, and its diameter is the same as that of the pressure receiving portion 1. On the other hand, the rear surface member 21b in which the cylindrical concave portion 24 into which the pressure receiving surface of the standard pressure receiving portion 1 is fitted and the circular O-ring groove 27 is formed in the cylindrical concave portion 24 is a disk-shaped member. The diameter is larger than the pressure receiving member 1 and smaller than the fixing flange. Therefore, the back surface side member 21b has a portion protruding from the pressure receiving surface side member 21a, and is, so to speak, a flange member of the main body 21. The rear surface member 21b has fixing bolt holes 28a and 28b formed in portions of the fixing flange 3 that face the fixing bolt holes 32a and 32b. Therefore, the back surface side member 21b functions as a member for fixing the pressure receiving portion of the pressure receiving adapter 2.

FIG. 4 shows a second part of the pressure receiving adapter 2 according to the present invention.
It is a rear view of an Example. The second embodiment has the same basic structure as that of the first embodiment shown in FIGS. 1 to 3,
The structure of the main body 21 is different. That is, in the second embodiment, the adapter body 21 has an integral structure, unlike the first embodiment. The adapter body 21 has a cylindrical shape like the standard pressure receiving portion 1, and the diameter thereof is the same as that of the pressure receiving portion 1. In the second embodiment of the structure without a flange, four knobs 29a, 29b, 29c, 29d are arranged at equal intervals on the outer circumference of the adapter body 21 and also on the outer circumference near the back surface thereof, and firmly attached by welding or the like. Has been.
Fixing bolt holes 28a, 28b, 28c, 28d are formed in these knobs 29a, 29b, 29c, 29d. In short, these knobs 29a, 29b, 29
c and 29d function as members for fixing the pressure receiving portion.

The configuration has been described above with reference to the first and second embodiments. As is clear from comparison with the second conventional example shown in FIG. 6 which is also applied to the standard pressure receiving portion 1, the pressure receiving adapter 2 according to the present invention has a small volume and weight and is formed compactly. This is because the pressure receiving adapter 2 according to the present invention has the same main body 21 diameter as the standard pressure receiving portion. If the diameter of the main body 21 of the pressure receiving portion adapter 2 is made equal to that of the standard pressure receiving portion, it becomes impossible to mount the pressure receiving member 1 on the fixing flange 3 by bolting. In the present invention, this problem is solved by attaching a pressure receiving portion fixing member to the main body 21 of the pressure receiving portion adapter 2. A specific example of the pressure receiving portion fixing member is the flange member 21a shown in FIGS. 1 to 3, or the knobs 29a, 29b, 29c, 2 shown in FIG.
9d.

Since the present invention is constructed as described above, if the pressure receiving adapter 2 has to be suddenly replaced due to damage or the like, the standard pressure receiving portion 1 is immediately attached to the measured side flange 4 as a gasket. It can be attached via the fixing flange 3 via 6. Since the first aid can be provided in this manner, the pressure measurement of the fluid to be measured can be continued for several hours until the replacement product arrives by using the diaphragm having high corrosion resistance.

[0016]

In the pressure receiving adapter according to the present invention, the diameter of the main body is made the same as the pressure receiving portion of the standard product, and a member for fixing the pressure receiving portion is attached to the outer periphery of the main body so that the pressure receiving portion of the standard product is sandwiched therebetween. It is designed so that it can be fixed to the fixing flange with bolts. Therefore, in an emergency situation where the pressure receiving adapter 2 must be replaced suddenly, the pressure receiving portion of the standard product can be immediately attached to the measured side flange with the fixing flange, which is important for process control. It has become possible to greatly reduce the unmeasurable time that causes trouble.

The pressure receiving adapter according to the present invention is compact because the diameter of its main body is the same as that of the standard pressure receiving portion, and the same main body member as that of the standard pressure receiving portion can be used. Savings have been made, and manufacturing costs have been reduced. In short, the cost advantage of the remote seal transmitter as a whole has increased. Also, since the volume and weight have been reduced, handling is easier.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a first embodiment of a pressure receiving adapter according to the present invention in a use state.

FIG. 2 is a sectional view of a first embodiment of a pressure receiving adapter according to the present invention.

FIG. 3 is a rear view of the first embodiment of the pressure receiving adapter according to the present invention.

FIG. 4 is a rear view of the second embodiment of the pressure receiving adapter according to the present invention.

FIG. 5 is a sectional view of a pressure receiving adapter of a first conventional example in a use state.

FIG. 6 is a cross-sectional view of a second conventional pressure receiving adapter in use.

[Explanation of reference numerals] 1 pressure receiving part of remote seal type differential pressure transmitter 2 pressure receiving adapter 3 fixing flange 4 measured side flange 5 O ring 6 gasket 7a, 7b, 7c, 7d fixing bolts 8a, 8b mounting bolts 9 Device to be measured 10 Diaphragm of pressure receiving part 11 Main body of pressure receiving part 12 Pressure chamber of pressure receiving part 13 Pressure transmission path 14 Pressure transmission tubes 15a, 15b Bolt hole 20 Diaphragm 21 of pressure receiving adapter Main body 21a of pressure receiving adapter Pressure receiving surface of main body of pressure receiving adapter Side member 21b Rear member of the body of the pressure receiving adapter (member for fixing pressure receiving portion) 22 Pressure chambers 23a, 23b of pressure receiving adapter 23c Pressure transmission passage 23c Pressure transmission chamber 24 Cylindrical recesses 25a, 25b to which pressure receiving portion fits Enclosed liquid injection passage 26a, 26b Sealing plug 27 O-ring groove 28a, 28b, 28c, 28d Bolt hole for fixing 29a, 29b, 29c, 29d Knobs (members for fixing pressure receiving portion) 31a, 31b Mounting bolt holes 32a, 32b Mounting bolt holes 41a, 41b Mounting bolt holes

─────────────────────────────────────────────────── ─── Continued Front Page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01L 19/00 101 G01L 19/06

Claims (3)

(57) [Claims] 1. A pressure-receiving surface of a measured-side flange and a rear surface of the pressure-receiving surface of a remote-sealing type transmitter are arranged so as to be in contact with each other, and are attached to the measured-side flange by a fixing flange and bolts. A pressure receiving adapter for transmitting the pressure of the fluid to be measured to the pressure receiving portion, the main body of which has the same diameter as the main body of the pressure receiving portion, and the pressure receiving portion fixing member is provided on the outer periphery of the main body. Characteristic remote seal type transmitter pressure receiving adapter. 2. The pressure receiving adapter for a remote seal type transmitter according to claim 1, wherein the pressure receiving portion fixing member is a flange member. 3. The pressure receiving adapter for a remote seal type transmitter according to claim 1, wherein the pressure receiving portion fixing member is a plurality of knobs arranged at equal intervals.