CN201281643Y - Differential pressure transmitter with sealed type septum - Google Patents
Differential pressure transmitter with sealed type septum Download PDFInfo
- Publication number
- CN201281643Y CN201281643Y CNU2008201549745U CN200820154974U CN201281643Y CN 201281643 Y CN201281643 Y CN 201281643Y CN U2008201549745 U CNU2008201549745 U CN U2008201549745U CN 200820154974 U CN200820154974 U CN 200820154974U CN 201281643 Y CN201281643 Y CN 201281643Y
- Authority
- CN
- China
- Prior art keywords
- ring
- mounting groove
- diaphragm seal
- differential pressure
- pressure transmitter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a diaphragm seal type differential pressure transmitter comprising a first ring-shaped mounting groove around the diaphragm on the seal surface of the diaphragm seal part, a second ring-shaped mounting groove is provided on the seal surface of the process flange, and ring-shaped spacer rings positioned between the first ring-shaped mounting groove and the second ring-shaped mounting groove. The utility model has advantages of reasonable and scientific structural design, simple structure, convenient operation and small maintenance amount and can solve a problem that when a diaphragm seal type differential pressure transmitter is applied in higher-pressure occasions, dielectric leakage is easy to occur.
Description
Technical field
The utility model relates to a kind of instrument, and particularly a kind of differential pressure transmitter is specifically related to a kind of diaphragm seal formula differential pressure transmitter.
Background technology
The diaphragm seal portion of diaphragm seal formula differential pressure transmitter and the hermetically-sealed construction of process flange generally are to adopt flat seal.In flat seal, the sealing surface of the sealing surface of diaphragm seal portion and process flange all is smooth plane, 2～3 the small concentric grooves of returning the car on the sealing surface of process flange.During sealing, the pad that will have elasticity or plasticity is placed between the sealing surface of the sealing surface of diaphragm seal portion and process flange, with bolted diaphragm seal portion and process flange.When tighting a bolt, diaphragm seal portion and process flange compress gasket make pad produce elasticity or plastic yield, thereby the small concentric groove that fills up the sealing surface of process flange is realized sealing.The defective of this hermetically-sealed construction is that when tighting a bolt, pad is extruded to both sides easily, is difficult for compressing, and when being applied in the higher occasion of pressure, occurs the phenomenon of dielectric leakage easily.
The utility model content
The purpose of this utility model is to propose a kind of diaphragm seal formula differential pressure transmitter, the hermetically-sealed construction that this diaphragm seal formula differential pressure transmitter adopts, in the time of solving present diaphragm seal formula differential pressure transmitter and be used in the higher occasion of pressure, the problem of dielectric leakage appears easily.
The utility model solves the problems of the technologies described above by the following technical solutions, reaches the purpose of this utility model:
A kind of diaphragm seal formula differential pressure transmitter, comprise the hermetically-sealed construction between the sealing surface of the sealing surface of diaphragm seal portion, process flange and described diaphragm seal portion and described process flange, described diaphragm seal portion comprises diaphragm, described hermetically-sealed construction seals the gap between the sealing surface of the sealing surface of described diaphragm seal portion and described process flange, and described hermetically-sealed construction comprises:
The first ring-like mounting groove offers the described first ring-like mounting groove around described diaphragm on the sealing surface of described diaphragm seal portion;
The second ring-like mounting groove offers the described second ring-like mounting groove on the sealing surface of described process flange;
Ring-like packing ring, described ring-like packing ring are arranged in the described first ring-like mounting groove and the described second ring-like mounting groove.
Use elasticity or plasticity packing ring to compare with hermetically-sealed construction of the prior art, the width of the ring-like packing ring of hermetically-sealed construction of the present utility model can design narrowlyer, the load of the bolt that diaphragm seal portion and process flange is fastening also can reduce, the surface flatness of the sealing surface of diaphragm seal portion sealing surface and process flange requires can be not high yet, but can seal higher pressure, help to solve the easy problem of leaking of medium under high pressure.
Further, the described first ring-like mounting groove is that the cross section is trapezoidal ring-like mounting groove, and the groove-root diameter of the described first ring-like mounting groove is less than the notch internal diameter; The described second ring-like mounting groove also is that the cross section is trapezoidal ring-like mounting groove, and the groove-root diameter of the described second ring-like mounting groove is less than the notch internal diameter; Described ring-like packing ring is arranged at the shape of the part in the described first ring-like mounting groove and the described second ring-like mounting groove, adapts with the shape of the described first ring-like mounting groove and the described second ring-like mounting groove.Hermetically-sealed construction under this technical scheme relies on the pretightning force of the bolt that diaphragm seal portion and process flange is fastening, makes the cross section be two inclined-planes of cell body of trapezoidal ring-like mounting groove and ring-like packing ring and contacts and realize sealing.This structure belongs to self-fastening sealing structure, and when pressure medium raise, the diaphragm seal portion of described ring-like packing ring and differential pressure transmitter, the snap-in force of process flange also strengthened thereupon, thereby reach sealing effectiveness.Advantages such as it is little that this hermetically-sealed construction has bolt load, and surfaceness is less demanding.
Further, described ring-like packing ring is the ring-like packing ring of metal material.The ring-like packing ring of metal material is that bulk metal processes, and the energy high temperature high voltage resistant is safe, can form the metal wire sealing of high specific pressure, and have certain elasticity and pressure self sealing action, and the occasion that adapts to variation in plant parameters is used.
Description of drawings
Fig. 1 is the structural representation of diaphragm seal formula differential pressure transmitter described in the utility model, and Fig. 1 (b) is the side view of Fig. 1 (a).
Fig. 2 is the structural representation of diaphragm seal device described in the utility model, and Fig. 2 (b) is the side view of Fig. 2 (a).
Fig. 3 is the cut-open view of the first ring-like mounting groove on the diaphragm seal device described in the utility model.
Fig. 4 is the scheme of installation of the described hermetically-sealed construction of wooden utility model.
Fig. 5 is the synoptic diagram that diaphragm seal formula differential pressure transmitter described in the utility model carries out the flow container level gauging.
Embodiment
Further specify the technical solution of the utility model below in conjunction with drawings and Examples.
Referring to Fig. 1, diaphragm seal formula differential pressure transmitter 1 (or being called diaphragm seal formula pressure unit) comprising: diaphragm seal device 11, and mounting flange 12, portion 14 is sent in kapillary 13 and change.Diaphragm seal device 11 is into a single integrated structure with mounting flange 12.Have mounting hole on the flange face of mounting flange 12.Kapillary 13 is connected with diaphragm seal device 11, and transmitter 14 is connected with kapillary 13.Shown in Fig. 1 (b), diaphragm seal formula differential pressure transmitter 1 generally comprises two diaphragm seal devices 11, two mounting flanges 12, two capillaries 13, a transmitter 14.
Referring to Fig. 4.Diaphragm seal formula differential pressure transmitter also comprises process flange 15, also has mounting hole on the flange face of process flange 15.Pass mounting hole on the flange face separately by bolt 16 between mounting flange 12 and the process flange 15, the mode fastening with nut is installed together.Like this, diaphragm seal portion 11 has also just tightened together by bolt 16 with process flange 15.Process flange 15 also comprises a sealing surface.Seal by hermetically-sealed construction between the sealing surface of the sealing surface of diaphragm seal device 11 and process flange 15.
Referring to Fig. 2 and Fig. 3.Hermetically-sealed construction comprises the first ring-like mounting groove 111 on the diaphragm seal device 11, offers the first ring-like mounting groove 111 around diaphragm 112 on the sealing surface 110 of diaphragm seal portion 11.The first ring-like mounting groove 111 is ring-like mounting grooves that the cross section is isosceles trapezoid, promptly usually said dovetail groove.The groove-root diameter of the first ring-like mounting groove 111 is less than the notch internal diameter, and from the cross section, the base that isosceles trapezoid is longer is a notch, and shorter base is a bottom land.
Hermetically-sealed construction also comprises the second ring-like mounting groove 151 (referring to Fig. 4) on the process flange 15, on the sealing surface 150 of process flange 15, offer with the position of second ring-like mounting groove 151, the second ring-like mounting grooves 151, size specification corresponding with the first ring-like mounting groove 111.The second ring-like mounting groove 151 also is the ring-like mounting groove that the cross section is isosceles trapezoid, promptly usually said dovetail groove.The groove-root diameter of the second ring-like mounting groove 151 is less than the notch internal diameter, and from the cross section, the base that isosceles trapezoid is longer is a notch, and shorter base is a bottom land.
Referring to Fig. 4.Hermetically-sealed construction also comprises ring-like packing ring 17.Ring-like packing ring 17 is arranged in the first ring-like mounting groove 111 and the second ring-like mounting groove 151.Ring-like packing ring 17 is arranged at the shape of the part in the first ring-like mounting groove 111 and the second ring-like mounting groove 151, adapts with the shape of the first ring-like mounting groove 111 and the second ring-like mounting groove 151.In this embodiment, the two side portions of ring-like packing ring 17 is arranged in the first ring-like mounting groove 111 and the second ring-like mounting groove 151.From the cross section, the shape of the two side portions of ring-like packing ring 17 is trapezoidal, and the shape with the first ring-like mounting groove 111 and the second ring-like mounting groove 151 adapts respectively.Ring-like packing ring 17 is ring-like packing rings that the cross section is octagon, the cross section of ring-like packing ring 17 comprises first isosceles trapezoid that adapts with the first ring-like mounting groove cross section, second isosceles trapezoid that adapts with the second ring-like mounting groove cross section, and connect first trapezoidal and the second trapezoidal center section.
Two inclined-planes (referring to Fig. 3) that the utility model is the cell body of trapezoidal first ring-like mounting groove 111, the second ring-like mounting groove 151 by the cross section contact with ring-like packing ring 17 and realize sealing.
Referring to Fig. 5, parts 1 are diaphragm seal formula differential pressure transmitters, and parts 2 are flow containers.The differential pressure that liquid produced that diaphragm seal formula differential pressure transmitter 1 is measured flow container 2 is carried out the measurement of flow container liquid level.
In application, the diaphragm seal device dimensions of diaphragm seal formula differential pressure transmitter is more, the dimensions of dovetail groove also has standards such as U.S. API, Japanese JPI, for adapting to various application scenarios, when diaphragm seal formula differential pressure transmitter was made, the dimensions of the first ring-like mounting groove 111 on the diaphragm seal device 11 can be made as required.
In sum, the utility model reasonable in design, science, simple in structure, easy to operate, maintenance is few, can solve the problem that occurs dielectric leakage when diaphragm seal formula differential pressure transmitter is applied in the higher occasion of pressure easily.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.
Claims (3)
1, a kind of diaphragm seal formula differential pressure transmitter, comprise the hermetically-sealed construction between the sealing surface of the sealing surface of diaphragm seal portion, process flange and described diaphragm seal portion and described process flange, described diaphragm seal portion comprises diaphragm, described hermetically-sealed construction seals the gap between the sealing surface of the sealing surface of described diaphragm seal portion and described process flange, it is characterized in that described hermetically-sealed construction comprises:
The first ring-like mounting groove offers the described first ring-like mounting groove around described diaphragm on the sealing surface of described diaphragm seal portion;
The second ring-like mounting groove offers the described second ring-like mounting groove on the sealing surface of described process flange;
Ring-like packing ring, described ring-like packing ring are arranged in the described first ring-like mounting groove and the described second ring-like mounting groove.
2, a kind of diaphragm seal formula differential pressure transmitter according to claim 1 is characterized in that: the described first ring-like mounting groove is that the cross section is trapezoidal ring-like mounting groove, and the groove-root diameter of the described first ring-like mounting groove is less than the notch internal diameter; The described second ring-like mounting groove also is that the cross section is trapezoidal ring-like mounting groove, and the groove-root diameter of the described second ring-like mounting groove is less than the notch internal diameter; Described ring-like packing ring is arranged at the shape of the part in the described first ring-like mounting groove and the described second ring-like mounting groove, adapts with the shape of the described first ring-like mounting groove and the described second ring-like mounting groove.
3, a kind of diaphragm seal formula differential pressure transmitter according to claim 1 and 2, it is characterized in that: described ring-like packing ring is the ring-like packing ring of metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201549745U CN201281643Y (en) | 2008-11-06 | 2008-11-06 | Differential pressure transmitter with sealed type septum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201549745U CN201281643Y (en) | 2008-11-06 | 2008-11-06 | Differential pressure transmitter with sealed type septum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201281643Y true CN201281643Y (en) | 2009-07-29 |
Family
ID=40928517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201549745U Expired - Lifetime CN201281643Y (en) | 2008-11-06 | 2008-11-06 | Differential pressure transmitter with sealed type septum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201281643Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344286A (en) * | 2013-06-28 | 2013-10-09 | 上海华强浮罗仪表有限公司 | Double-flange balance flow meter |
| CN110383028A (en) * | 2017-03-10 | 2019-10-25 | 霍尼韦尔国际公司 | The pressure sensor with overvoltage protection that output error reduces |
| WO2021202534A1 (en) * | 2020-03-31 | 2021-10-07 | Fmc Technologies, Inc. | Differential pressure based automated sand detection and handling system for oil and gas well operations |
-
2008
- 2008-11-06 CN CNU2008201549745U patent/CN201281643Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344286A (en) * | 2013-06-28 | 2013-10-09 | 上海华强浮罗仪表有限公司 | Double-flange balance flow meter |
| CN110383028A (en) * | 2017-03-10 | 2019-10-25 | 霍尼韦尔国际公司 | The pressure sensor with overvoltage protection that output error reduces |
| CN110383028B (en) * | 2017-03-10 | 2021-07-30 | 霍尼韦尔国际公司 | Pressure sensor with overvoltage protection with reduced output error |
| WO2021202534A1 (en) * | 2020-03-31 | 2021-10-07 | Fmc Technologies, Inc. | Differential pressure based automated sand detection and handling system for oil and gas well operations |
| US11938422B2 (en) | 2020-03-31 | 2024-03-26 | Fmc Technologies, Inc. | Differential pressure based automated sand detection and handling system for oil and gas well operations |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090729 |
|
| CX01 | Expiry of patent term |