JP2002357499A - Differential pressure measuring device of diaphragm seal type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a differential pressure measuring device of diaphragm seal type which can be easily assembled. SOLUTION: This differential pressure measuring device of diaphragm seal type is provided with a diaphragm seal unit having a pressure receiving diaphragm provided on one surface of a pressure receiving block, which is connected to a main body of the differential pressure measuring device through a pressure guide tube, and a flush ring of which one surface gets into contact with one surface of the pressure receiving block. A pair of holders are provided to be fixed to the flush ring on one end side, and cooperate to hold the circumferential surface of the pressure receiving block on the other end side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaphragm seal type differential pressure measuring device which is easy to assemble.

[0002]

2. Description of the Related Art FIG. 6 is an explanatory view of a main part of a conventional example generally used conventionally, and FIG. 7 is a detailed explanatory view of a main part of FIG. In the figure, the diaphragm seal unit 3
Is provided on the differential pressure measuring device main body 1 via the pressure guiding tube 2. In this case, the diaphragm seal unit 3
Disk-shaped as a whole

[0003] In this case, a capillary tube is used as the pressure guiding tube 2. The diaphragm seal unit 3 includes a mounting flange 31, a pressure receiving block 32,
A pressure receiving diaphragm 33 is provided on one surface of the pressure receiving block 32 and forms a pressure receiving chamber 34. The pressure receiving chamber 34 is communicated with the pressure guiding tube 2, and receives the pressure receiving portion filled liquid 101.
Is satisfied.

[0004] The flash ring 41 is
One surface of each of the two surfaces contacts the gasket 42. In this case, it has a cylindrical shape.

The flash ring 41 includes, for example, a mounting flange A provided on the tank and a pressure receiving block 32 for extracting pressure from a tank containing the measurement fluid FL.
To take out the drain and vent of the measurement fluid FL.

A gasket B and a gasket 42 are provided between the mounting flange of the flash ring 41 and the pressure receiving block 32, respectively. The vent plug 43 and the drain plug 44 are attached to a tapered screw provided on the outer periphery of the flash ring 41 by sealing with a seal tape or the like.

In the above configuration, the pressure receiving diaphragm 3
The pressure received by 3 is transmitted to the differential pressure measuring device main body 1 by the capillary tube 2 filled with the filling liquid 101.

[0008]

The above-mentioned flush ring 41 has a diaphragm seal type differential pressure measuring device and its parts when the pipe diameter on the mounting tank side is small, or when there is a valve on the tank side. During this time, drains accumulate at the time of operation stop and vents accumulate at the start of operation, and are necessary for their removal.

However, in such an apparatus, during the installation work, each part is held while holding the diaphragm seal unit 3 and the flash ring 41, and the gasket B and the gasket 42 sandwiched on both sides of the flash ring 41. It is necessary to install while aligning the center of the.

In addition, since the diaphragm seal unit 3 is included, the weight is heavy, it is very difficult to install it alone, and it must be performed by several people.

An object of the present invention is to solve the above-mentioned problem and to provide a diaphragm seal type differential pressure measuring device which is easy to assemble.

In short, the objects of the present invention are as follows: (1) Diaphragm seal type having a flash ring 41 The diaphragm seal unit 3 of the differential pressure measuring device and the flash ring 41 are integrated to facilitate mounting and installation. A differential pressure measuring device is provided.

(2) Integrated flash ring 4
When mounting the diaphragm seal unit 1 and the diaphragm seal unit 3 to the object to be measured, it is not necessary to newly loosen the screws or the like for integrating the same, that is, to maintain the integrated state as it is, and to attach the flange to the mounting flange to be measured. Provided is a diaphragm seal type differential pressure measuring device which can be assembled by being directly tightened with a bolt.

(3) On the side of the diaphragm seal unit 3, there is no need for processing or new parts for integrating with the flash ring 41. The present invention provides a diaphragm seal type differential pressure measuring device in which a flash ring 41 is attached to a diaphragm seal unit 3 used by a customer, not a product manufactured by any manufacturer, nor a new one.

[0015]

In order to achieve the above object, according to the present invention, in a diaphragm seal type differential pressure measuring apparatus according to the present invention, a pressure receiving diaphragm provided on one surface of a pressure receiving block is provided. In a diaphragm seal type differential pressure measuring device having a diaphragm seal unit connected to a differential pressure measuring device main body via a pressure guiding tube, and a flash ring having one surface in contact with one surface of the pressure receiving block, one end of the flash ring has one end. It is characterized in that it has a pair of holders that are fixed and the other end side cooperates with each other to hold the peripheral surface of the pressure receiving block.

According to a second aspect of the present invention, in the diaphragm seal type differential pressure measuring apparatus according to the first aspect, the other end of the holder is provided at one end of the holder so as to press and hold the pressure receiving block. It is characterized by having a first bent portion.

According to a third aspect of the present invention, in the diaphragm seal type differential pressure measuring device according to the first or second aspect, the holder is so arranged that the other end of the holder is in contact with the peripheral surface of the pressure receiving block. And a second bent portion provided on the other end side.

According to a fourth aspect of the present invention, in the diaphragm seal type differential pressure measuring device according to any one of the first to third aspects, a stainless spring material is used as the holder. I do.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory diagram of a main part configuration of an embodiment of the present invention,
2 is a perspective view of a main part of FIG. 1, FIG. 3 is a front view of FIG. 2, FIG. 4 is a side view of FIG. 2, and FIG. 5 is a plan view of FIG.

In the figure, the same symbols as in FIG. 7 indicate the same functions. Hereinafter, only differences from FIG. 7 will be described. The pair of holders 51 are attached to the flash ring 41 on one end side 51.
1 is fixed, and the other end side 512 cooperates with each other to clamp the peripheral surface of the pressure receiving block 32.

In this case, although the holder 51 is not shown in FIG. 1, the same holder is provided at a symmetric position on the opposite side of the flash ring 41 by 180 degrees. That is,
The pressure receiving block 32 is held between the two holders 51.

In this case, one end 511 is fixed to the flash ring 41 by two screws 52.
The first bent portion 513 is provided on one end side 511 of the holder so that the other end side 512 of the holder presses and holds the pressure receiving block 32.

The second bent portion 514 is provided on the other end of the holder such that the other end 512 of the holder is in contact with the peripheral surface of the pressure receiving block 32. in this case,
As the holder 51, a stainless spring material is used.

In the above configuration, a method of assembling the present apparatus will be described. The gasket 42 is placed on the pressure receiving block 32 of the diaphragm seal unit 3, the flash ring 41 is placed thereon, and the holder 51 is fixed with screws 52.

As a result, (1) The holder 51 made of a leaf spring along the peripheral surface of the pressure receiving block 32 is fastened to the outer periphery of the cylindrical flash ring 41 from both sides of the peripheral surface of the pressure receiving block 32. There is no need to align the centers of the ring 41, the gasket 42, and the pressure receiving block 32. By tightening the screw 52 of the holder 51, a diaphragm seal type differential pressure measuring device that can easily align the centers of the components automatically is obtained.

(2) If the force for tightening the peripheral surface of the pressure receiving block 32 of the holder 51 is appropriately selected, the flash ring 4
1. The gasket 42 and the pressure receiving block 32 are integrated,
When the diaphragm seal unit 3 is installed on the mounting flange to be measured, there is no need to work while holding each component, and a diaphragm seal type differential pressure measuring device that can be easily operated and the number of mounting steps can be reduced can be obtained.

(3) The holder 51 is provided with the pressure receiving block 32.
Is not fixed in the axial direction only by the tightening force on the outer peripheral surface of the gasket. Even when the diaphragm seal unit 3 with the flash ring 41 is mounted on the mounting flange to be measured, the tightening force of the gasket does not increase. A diaphragm seal type differential pressure measuring device can be obtained which has no influence and can be detached in the same integrated shape as the original state when detached.

(4) In the present invention, no processing is performed on the diaphragm seal unit 3 side and the holder 51
Since a special shape for attaching a diaphragm is not required, a diaphragm seal type differential pressure measuring device which can newly attach a flash ring 41 to an existing diaphragm seal unit 3 as already used is obtained. .

(5) Since the first bent portion 513 is provided so that the holder 51 presses and holds the pressure receiving block 32, a diaphragm seal type in which the diaphragm seal unit 3 and the flash ring 41 can be more reliably integrated can be obtained. A differential pressure measuring device is obtained.

(6) Since the second bent portion 514 is provided so that the holder 51 is in contact with the peripheral surface of the pressure receiving block 32, the diaphragm seal unit 3 and the flash ring 41 can be more reliably integrated. A diaphragm seal type differential pressure measuring device is obtained.

(7) Since stainless steel spring material is used as the holder 51, the elasticity is improved, the integration of the diaphragm seal unit 3 and the flash ring 41 is more reliably obtained, and the corrosion resistance is also improved. As a result, a diaphragm seal type differential pressure measuring device with improved reliability can be obtained.

The foregoing description has been directed only to specific preferred embodiments for purposes of explanation and illustration of the present invention. Therefore, the present invention is not limited to the above-described embodiment, and includes many more modifications without departing from the spirit thereof.
This includes deformation.

[0033]

As described above, according to the first aspect of the present invention,
According to the above, the following effects are obtained. (1) A leaf spring holder along the peripheral surface of the pressure receiving block is fastened to the outer periphery of the flash ring from both sides of the peripheral surface of the pressure receiving block, so that there is no need to align the centers of the flash ring, gasket and pressure receiving block during assembly. ,
When the screw of the holder is tightened, a diaphragm seal type differential pressure measuring device in which the center of each component can be easily adjusted automatically is obtained.

(2) If the force for tightening the peripheral surface of the pressure receiving block of the holder is properly selected, the flash ring, the gasket, and the pressure receiving block are integrated, and when the diaphragm seal unit is installed on the mounting flange to be measured, etc. There is no need to work while holding each part, and a diaphragm seal type differential pressure measuring device that can be easily operated and the number of installation steps can be reduced can be obtained.

(3) Since the holder is not fixed in the axial direction only by the fastening force to the outer peripheral surface of the pressure receiving block, the holder is used as a diaphragm seal unit with a flash ring when it is mounted on the mounting flange to be measured. Thus, a diaphragm seal type differential pressure measuring device can be obtained which has no influence on the tightening force of the gasket and can be removed in the same integral shape as the original state when removing.

(4) In the present invention, no processing is performed on the diaphragm seal unit side, and a special shape for attaching the holder is not required. A diaphragm seal type differential pressure measuring device which can newly attach a flash ring to the unit is obtained.

According to the second aspect of the present invention, the following effects can be obtained. Since the first bent portion is provided so that the holder presses and holds the pressure receiving block, a diaphragm seal-type differential pressure measuring device in which integration of the diaphragm seal unit and the flash ring can be obtained more reliably is obtained.

According to the third aspect of the present invention, the following effects can be obtained. Since the second bent portion is provided so that the holder is in contact with the peripheral surface of the pressure receiving block, a diaphragm seal type differential pressure measuring device in which integration of the diaphragm seal unit and the flash ring can be obtained more reliably is obtained.

According to the fourth aspect of the present invention, the following effects can be obtained. As a stainless steel spring material was used as the holder, the elasticity was improved, and the integration of the diaphragm seal unit and the flash ring was obtained more reliably.
Further, since the corrosion resistance is also improved, a diaphragm seal type differential pressure measuring device with further improved reliability can be obtained.

Therefore, according to the present invention, a diaphragm seal type differential pressure measuring device which can be easily assembled can be realized.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a main part configuration of an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of FIG. 1;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a side view of FIG. 2;

FIG. 5 is a plan view of FIG. 2;

FIG. 6 is an explanatory view of a configuration of a main part of a conventional example generally used in the related art.

FIG. 7 is a detailed description of a main part of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Differential pressure measuring device main body 2 Pressure guide tube 3 Diaphragm seal unit 31 Mounting flange 32 Pressure receiving block 33 Pressure receiving diaphragm 34 Pressure receiving chamber 41 Flash ring 42 Gasket 43 Vent plug 44 Drain plug 51 Holder 511 One end side 512 Other end side 513 First bending Part 514 Second bent part 52 Screw 101 Pressure receiving part sealed liquid A Mounting flange B Gasket FL Measurement fluid

Claims (4)

[Claims] 1. A diaphragm seal unit having a pressure receiving diaphragm provided on one surface of a pressure receiving block and connected to a main body of a differential pressure measuring device via a pressure guiding tube, and a flash ring having one surface contacting one surface of the pressure receiving block. A diaphragm seal type differential pressure measuring device comprising: a pair of holders having one end fixed to the flash ring and the other end cooperating with each other to hold a peripheral surface of the pressure receiving block. Differential pressure measuring device. 2. The diaphragm seal type according to claim 1, further comprising a first bent portion provided at one end of the holder so that the other end of the holder presses and holds the pressure receiving block. Differential pressure measuring device. 3. The apparatus according to claim 1, further comprising a second bent portion provided on the other end of the holder so that the other end of the holder is in contact with the peripheral surface of the pressure receiving block. The diaphragm seal type differential pressure measuring device according to claim 2. 4. The diaphragm seal type differential pressure measuring device according to claim 1, wherein a stainless spring material is used as said holder.