CN102353497B - Single diaphragm differential pressure gauge - Google Patents
Single diaphragm differential pressure gauge Download PDFInfo
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- CN102353497B CN102353497B CN201110177222.7A CN201110177222A CN102353497B CN 102353497 B CN102353497 B CN 102353497B CN 201110177222 A CN201110177222 A CN 201110177222A CN 102353497 B CN102353497 B CN 102353497B
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- diaphragm
- corrugated tube
- differential pressure
- pressure gauge
- connector
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Abstract
The invention provides a single diaphragm differential pressure gauge. The differential pressure gauge comprises: an upper connecting body, wherein a first bellows is arranged in an inner chamber of the upper connecting body; and a diaphragm, wherein the diaphragm is arranged between the upper connecting body and a lower connecting body and two surfaces of the diaphragm are respectively attached to end portions of the first bellows and a second bellows. Besides, a low voltage medium cavity is formed between the diaphragm and an inner wall of the upper connecting body and an outer wall of the first bellows; a high-voltage medium cavity is formed between the diaphragm and an inner wall of the lower connecting body and an outer wall of the second bellows; the upper connecting body is in the low voltage medium cavity; an upper overvoltage protection surface, which is opposite to the diaphragm, and the lower connecting body are in the high-voltage medium cavity; and a lower overvoltage protection surface, which is opposite to the diaphragm, is a corrugated surface. According to the single diaphragm differential pressure gauge provided in the invention, service life of the single diaphragm differential pressure gauge is prolonged.
Description
Technical field
The present invention relates to pressure measuring device technical field, more particularly, relate to a kind of single diaphragm differential pressure gauge.
Background technology
Differential pressure gauge is the special instrument kind of a class in tensimeter, is applicable to or different medium identical to two kinds of pressure and measures, and the differential pressure value of this two media is shown.Differential pressure gauge is generally used for detecting the loss of pressure medium.It has been widely used in the various industries such as industrial and mineral, chemical industry, food, medical treatment, scientific research.In recent years, the market demand of various differential pressure gauges is increasing, has a extensive future.
Single diaphragm differential pressure gauge is to utilize diaphragm to pressure-sensitive characteristic, and the variation of differential pressure pressure is converted into the meter unit of straight linear displacement to measure.
In existing single diaphragm differential pressure gauge, upper connector and lower connector composition annular seal space, annular seal space is divided into upper and lower two parts by the diaphragm being arranged in annular seal space, the wherein outer wall of the corrugated tube in upper connector and the inwall of upper connector and diaphragm composition low pressure dielectric cavity, corrugated tube in lower connector and the inwall of lower connector and diaphragm composition high-pressure medium chamber, wherein on the corrugated tube in upper connector, be connected with transmission lever, high-pressure medium passes into high-pressure medium in chamber, in low pressure dielectric cavity, pass into low piezodielectric, the effect of the pressure differential by medium, make diaphragm generation deformation, the deformation of diaphragm drives the corrugated tube generation deformation in low pressure dielectric cavity, and drive transmission lever displacement, displacement is delivered on the pointer of dial plate and shows the most at last, finally measure the differential pressure of diaphragm media of both sides.
But, in the course of work of existing single diaphragm differential pressure gauge, differential pressure makes diaphragm produce deformation, when diaphragm deformation, surface is corrugated surface shape, and gradually near upper overvoltage protection face on the other side on upper connector, existing upper overvoltage protection face is planar structure, after diaphragm when in running order fits to overvoltage protection face, owing to fitting completely with upper overvoltage protection face in the surface of diaphragm, diaphragm still continues distortion, causes the damage of diaphragm; May connect instead due to misoperation at actual operating process mesohigh medium and low piezodielectric simultaneously; there will be equally the corrugated surface of diaphragm to fit completely with lower connector lower overvoltage protection face on the other side; can cause equally the distortion of diaphragm excessive, and then cause the damage of diaphragm.
The excessive deformation of above-mentioned diaphragm causes the damage of diaphragm, has shortened the serviceable life of single diaphragm differential pressure gauge.
In addition, above-mentioned upper connector and the link of lower connector are designed to flange plate structure, and are realized and being tightly connected by O-ring seal between link.Above-mentioned employing O-ring seal seals, and O-ring seal is easy to corrosion or aging and then generation leakage, finally causes the life-span of single diaphragm differential pressure gauge further to shorten.
Therefore, how providing a kind of single diaphragm differential pressure gauge, to extend the serviceable life of single diaphragm differential pressure gauge, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of single diaphragm differential pressure gauge, to extend its serviceable life.
In order to achieve the above object, the invention provides following technical scheme:
A kind of single diaphragm differential pressure gauge, comprising:
In inner chamber, be provided with the upper connector of the first corrugated tube;
Be connected with described upper connector, and in inner chamber, be provided with the lower connector of the second corrugated tube; And be arranged between described upper connector and lower connector, and two sides respectively with the diaphragm of the end laminating of described the first corrugated tube and the second corrugated tube; Wherein: between the inwall of this diaphragm and described upper connector and the outer wall of the first corrugated tube, form low pressure dielectric cavity, between the inwall of this diaphragm and lower connector and the outer wall of the second corrugated tube, form high-pressure medium chamber;
On described upper connector, be arranged in described low pressure dielectric cavity, and be arranged in described high-pressure medium chamber on the upper overvoltage protection face relative with described diaphragm and described lower connector, and the lower overvoltage protection face relative with described diaphragm is corrugated surface.
Preferably, in above-mentioned single diaphragm differential pressure gauge, described upper connector is connected by welded seal with described lower connector.
Preferably, in above-mentioned single diaphragm differential pressure gauge, described the first corrugated tube and the second corrugated tube are singel-ply bellows or multiply bellows.
Preferably, in above-mentioned single diaphragm differential pressure gauge, described the first corrugated tube and the second corrugated tube are corrugated stainless steel tubing.
Preferably, in above-mentioned single diaphragm differential pressure gauge, the transmission lever on described the first corrugated tube is positioned on the central axis of described the first corrugated tube.
Preferably, in above-mentioned single diaphragm differential pressure gauge, the position that described upper connector is connected with lower connector is provided with the side dielectric cavity communicating with described low pressure dielectric cavity, is provided with the low pressure medium channel communicating with described side dielectric cavity on described lower connector; On described lower connector, be provided with the high-pressure medium passage communicating with described high-pressure medium chamber.
Preferably, in above-mentioned single diaphragm differential pressure gauge, the axis of described high-pressure medium channel interface parallels with the axis of described low pressure medium channel interface.
Compared with existing single diaphragm differential pressure gauge; in single diaphragm differential pressure gauge provided by the invention; on upper connector, be arranged in low pressure dielectric cavity, and be arranged in high-pressure medium chamber on the upper overvoltage protection face relative with diaphragm and lower connector, and the lower overvoltage protection face relative with diaphragm is corrugated surface.The diaphragm being out of shape in the course of work of single diaphragm differential pressure gauge can be fitted completely with upper overvoltage protection face, has prevented the excessive deformation of diaphragm.Meanwhile, though because of misoperation high-pressure medium and low piezodielectric connect anti-after, diaphragm also can be fitted completely with lower overvoltage protection face, has prevented that the distortion of diaphragm is excessive.The structure of above-mentioned upper overvoltage protection face and lower overvoltage protection face can be completely and diaphragm fit, prevented that the distortion of diaphragm is excessive, avoided the damage of diaphragm, extended the serviceable life of single diaphragm differential pressure gauge.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the single diaphragm differential pressure gauge that Fig. 1 provides for the embodiment of the present invention.
In Fig. 1:
Transmission lever 1, the first corrugated tube 2, upper connector 3, diaphragm 4, lower connector 5, high-pressure medium chamber 6, low pressure dielectric cavity 7, side dielectric cavity 8, the second corrugated tube 9, upper overvoltage protection face A, lower overvoltage protection face B.
Embodiment
The invention provides a kind of single diaphragm differential pressure gauge, extended the serviceable life of existing single diaphragm differential pressure gauge.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to accompanying drawing 1, the structural representation of the single diaphragm differential pressure gauge that Fig. 1 provides for the embodiment of the present invention.
The single diaphragm differential pressure gauge that the embodiment of the present invention provides comprises: upper connector 3, transmission lever 1, the first corrugated tube 2, diaphragm 4, lower connector 5 and the second corrugated tube 9, wherein:
The first corrugated tube 2 is arranged in the inner chamber of upper connector 3, and transmission lever 1 is arranged in the first corrugated tube 2 and with diaphragm 4 and is connected;
The second corrugated tube 9 is arranged in the inner chamber of lower connector 5, and upper connector 3 is connected with lower connector 5;
Diaphragm 4 is arranged between upper connector 3 and lower connector 5, and the two sides of this diaphragm 4 fits with the end of the first corrugated tube 2 and the second corrugated tube 9 respectively;
Between the outer wall of the inwall of diaphragm 4 and upper connector 3 and the first corrugated tube 2, form low pressure dielectric cavity 7, low pressure dielectric cavity 7 communicates with low piezodielectric by low pressure medium channel, be used for being filled with low piezodielectric, between the inwall of this diaphragm 4 and lower connector 5 and the outer wall of the second corrugated tube 9, form high-pressure medium chamber 6, high-pressure medium chamber 6 communicates with high-pressure medium passage, for being filled with high-pressure medium;
On upper connector 3, be arranged in low pressure dielectric cavity 7, and the upper overvoltage protection face A relative with diaphragm 4 be corrugated surface, on lower connector 5, be arranged in high-pressure medium chamber 6, and the lower overvoltage protection face B relative with diaphragm 4 be corrugated surface.
The course of work of the single diaphragm differential pressure gauge that the present embodiment provides is as follows:
High-pressure medium enters into high-pressure medium chamber 6 by high-pressure medium passage, low piezodielectric enters into low pressure dielectric cavity 7 by low pressure medium channel, the high-pressure medium on diaphragm 4 both sides and low piezodielectric act on the surface of diaphragm 4, because making diaphragm 4, differential pressure can be out of shape towards a side of low pressure dielectric cavity 7, and then make diaphragm 4 produce distortion, the distortion of diaphragm 4 drives transmission lever 1 to produce displacement, transmission lever 1 passes to this displacement on the movement of single diaphragm differential pressure gauge, and then realize the variation of pointer, differential pressure is indicated.
Compared with existing single diaphragm differential pressure gauge; in single diaphragm differential pressure gauge provided by the invention; on upper connector 3, be arranged in low pressure dielectric cavity 7, and be arranged in high-pressure medium chamber 6 on the upper overvoltage protection face A relative with diaphragm 4 and lower connector 5, and the lower overvoltage protection face B relative with diaphragm 4 is corrugated surface.The diaphragm 4 being out of shape in the course of work of single diaphragm differential pressure gauge can be fitted completely with upper overvoltage protection face A, has prevented the excessive deformation of diaphragm 4.Meanwhile, even after high-pressure medium and low piezodielectric connect instead, diaphragm 4 also can be fitted completely with lower overvoltage protection face B, has prevented that the distortion of diaphragm 4 is excessive.The structure of above-mentioned upper overvoltage protection face A and lower overvoltage protection face B has prevented the damage of diaphragm 4, has extended the serviceable life of single diaphragm differential pressure gauge.
In the embodiment of the present invention, upper connector 3 and lower connector 5 are tightly connected and ensure the sealing in low pressure dielectric cavity 7 and high-pressure medium chamber 6, ensure manometric normal work.Realizing the mode that above-mentioned upper connector 3 and lower connector 5 be tightly connected has a lot, the rubber seal of available technology adopting easily corrosion causes leaking, in the embodiment of the present invention, upper connector 3 is connected by welded seal with lower connector 5, avoid the etching problem of rubber seal, further extended the serviceable life of single diaphragm differential pressure gauge.Certainly, the upper connector 3 in the present embodiment and lower connector 5 can also be realized and being tightly connected by other sealing means, are not limited to this.
In the single diaphragm differential pressure gauge that the present embodiment provides, the first corrugated tube 2 and the second corrugated tube 9 can be singel-ply bellows, can be also multiply bellows.The preferred corrugated stainless steel tubing that adopts stainless steel material to make of the first corrugated tube 2 and the second corrugated tube 9, has further improved the intensity of corrugated tube.
In above-described embodiment, the deformation that transmission lever 1 produces diaphragm 4 is delivered on the movement of whole single diaphragm differential pressure gauge, by the enlarger on movement and angle converting mechanism, the displacement of diaphragm 4 is converted to the angular transformation of pointer, thereby realize the sensing of pointer to differential pressure, finally realized the demonstration of differential pressure.In order further to optimize technique scheme, above-mentioned transmission lever 1 is positioned on the central axis of diaphragm 4, has ensured the deformation of diaphragm 4 to obtain more accurately.
In single diaphragm differential pressure gauge in above-described embodiment, the position that upper connector 3 is connected with lower connector 5 is provided with the side dielectric cavity 8 communicating with low pressure dielectric cavity, on lower connector 5, be provided with the low pressure medium channel communicating with side dielectric cavity 8, on lower connector 5, be provided with the high-pressure medium passage communicating with high-pressure medium chamber, above-mentioned low pressure medium channel and high-pressure medium passage are all arranged on lower connector 5, facilitated this single diaphragm differential pressure gauge in the course of the work with being connected of high-pressure medium source and low pressure medium source pipeline.More preferred, the axis of above-mentioned high-pressure medium channel interface parallels with the axis of low pressure medium channel interface.
Just comparatively speaking, the pressure that high pressure refers to measuring media is relatively high for " high pressure " described in above-described embodiment and " low pressure ", and it is relatively low that low pressure refers to the pressure of measuring media.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a single diaphragm differential pressure gauge, comprising:
In inner chamber, be provided with the upper connector (3) of the first corrugated tube (2);
Be connected with described upper connector (3), and in inner chamber, be provided with the lower connector (5) of the second corrugated tube (9); And be arranged between described upper connector (3) and lower connector (5), and two sides respectively with the diaphragm (4) of the end laminating of described the first corrugated tube (2) and the second corrugated tube (9); Wherein: between the inwall of this diaphragm (4) and described upper connector (3) and the outer wall of the first corrugated tube (2), form low pressure dielectric cavity, between the inwall of this diaphragm (4) and lower connector (5) and the outer wall of the second corrugated tube (9), form high-pressure medium chamber;
It is characterized in that, on described upper connector (3), be arranged in described low pressure dielectric cavity, and on the upper overvoltage protection face (A) relative with described diaphragm (4) and described lower connector (5), be arranged in described high-pressure medium chamber, and the lower overvoltage protection face (B) relative with described diaphragm (4) is corrugated surface;
The position that described upper connector (3) is connected with lower connector (5) is provided with the side dielectric cavity (8) communicating with described low pressure dielectric cavity, is provided with the low pressure medium channel communicating with described side dielectric cavity (8) on described lower connector (5); On described lower connector, be provided with the high-pressure medium passage communicating with described high-pressure medium chamber (6), the axis of high-pressure medium channel interface parallels with the axis of low pressure medium channel interface.
2. single diaphragm differential pressure gauge according to claim 1, is characterized in that, described upper connector (3) is connected by welded seal with described lower connector (5).
3. single diaphragm differential pressure gauge according to claim 2, is characterized in that, described the first corrugated tube (2) and the second corrugated tube (9) are singel-ply bellows or multiply bellows.
4. single diaphragm differential pressure gauge according to claim 3, is characterized in that, described the first corrugated tube (2) and the second corrugated tube (9) are corrugated stainless steel tubing.
5. single diaphragm differential pressure gauge according to claim 1, is characterized in that, the transmission lever (1) in described the first corrugated tube (2) is positioned on the central axis of described the first corrugated tube (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110177222.7A CN102353497B (en) | 2011-06-28 | 2011-06-28 | Single diaphragm differential pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110177222.7A CN102353497B (en) | 2011-06-28 | 2011-06-28 | Single diaphragm differential pressure gauge |
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| Publication Number | Publication Date |
|---|---|
| CN102353497A CN102353497A (en) | 2012-02-15 |
| CN102353497B true CN102353497B (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110177222.7A Active CN102353497B (en) | 2011-06-28 | 2011-06-28 | Single diaphragm differential pressure gauge |
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| CN (1) | CN102353497B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596698A (en) * | 2013-10-31 | 2015-05-06 | 上海赛途仪器仪表有限公司 | Diaphragm-type differential pressure gauge |
| CN104776953A (en) * | 2015-04-15 | 2015-07-15 | 江苏德尔森传感器科技有限公司 | Detection method of fluid medium pressure difference value |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191116164A (en) * | 1910-07-13 | 1912-01-04 | Erste Sueddeutsche Manometerba | An Improved Differential Manometer. |
| US4333350A (en) * | 1980-05-01 | 1982-06-08 | Gibb James M | Differential pressure sensing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6067831A (en) * | 1983-09-22 | 1985-04-18 | Shimadzu Corp | Differential pressure transmitter |
| JPH05256719A (en) * | 1992-03-16 | 1993-10-05 | Hitachi Ltd | Differential pressure transmitter |
| US7434472B2 (en) * | 2006-03-31 | 2008-10-14 | Leitko Travis W | Differential pressure transducer configurations including displacement sensor |
-
2011
- 2011-06-28 CN CN201110177222.7A patent/CN102353497B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191116164A (en) * | 1910-07-13 | 1912-01-04 | Erste Sueddeutsche Manometerba | An Improved Differential Manometer. |
| US4333350A (en) * | 1980-05-01 | 1982-06-08 | Gibb James M | Differential pressure sensing device |
Non-Patent Citations (2)
| Title |
|---|
| JP昭60-67831A 1985.04.18 |
| JP特开平5－256719A 1993.10.05 |
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| CN102353497A (en) | 2012-02-15 |
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