CN201867278U - Differential pressure diaphragm seal structure of transmitting instrument - Google Patents
Differential pressure diaphragm seal structure of transmitting instrument Download PDFInfo
- Publication number
- CN201867278U CN201867278U CN2010206090564U CN201020609056U CN201867278U CN 201867278 U CN201867278 U CN 201867278U CN 2010206090564 U CN2010206090564 U CN 2010206090564U CN 201020609056 U CN201020609056 U CN 201020609056U CN 201867278 U CN201867278 U CN 201867278U
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- capillary tube
- pressure side
- diaphragm
- voltage side
- side capillary
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Abstract
The utility model discloses a differential pressure diaphragm seal structure of a transmitting instrument, comprising a measuring head of the transmitting instrument, a pressure sensing head and a protective hose, wherein a high voltage side containing chamber and a low voltage side containing chamber are arranged in a diaphragm box body in the middle of the pressure sensing head; a voltage inlet at the high voltage terminal, a high voltage diaphragm and a high voltage side capillary tube are arranged in the high voltage side containing chamber, and the high voltage side capillary tube is communicated with a containing chamber formed by the high voltage diaphragm and the diaphragm box body; a voltage inlet at the low voltage terminal, a low voltage diaphragm and a low voltage side capillary tube are arranged in the low voltage side containing chamber, and the low voltage side capillary tube is communicated with a containing chamber formed by the low voltage diaphragm and the diaphragm box body; and the high voltage side capillary tube as well as the low voltage side capillary tube are arranged in the protective hose. The seal structure can carry out measurement without heat tracing, and dispenses with extra heating and heat-insulating structures, thus reducing the operating cost. The high voltage side capillary tube and the low voltage side capillary tube are arranged in the same protective hose, thereby reducing the influence of variation of ambient temperature on measuring results and improving the accuracy of the measuring results; and the seal structure is an energy-saving and environmentally friendly measuring device.
Description
Technical field
The utility model relates to a kind of differential diaphragm hermetically-sealed construction of the appurtenances of measuring the transmitter of fluid correlation parameter, especially transmitter.
Background technology
At petrochemical industry, chemical fertilizer, medicine, food, brewage, fields such as chemical industry for making chlorine and alkali, light industry, all need to measure the correlation parameter of fluid media (medium), as pressure, differential pressure, density etc. to determine the performance of fluid.Usual pressure transmitter commonly used is measured in the prior art, but if the temperature of fluid media (medium) is higher, because the usual pressure transmitter can not bear higher temperature, then generally all need draw longer pressure guiding pipe, and when environment temperature is lower than zero degree, impulse partly be accompanied heat, so both cause complex structure, volume bigger, and in order to accompany heat, also need to be provided with extra heating, insulation construction,, increase its cost accordingly as insulation can, heat-insulation layer (snakeskin layer) etc.; What is more important: companion's heat needs to consume the extra energy, does not belong to the low-carbon economy of present promotion, is not a kind of measurement mechanism of energy-saving and environmental protection.
Summary of the invention
The utility model is at the usual pressure transmitter of prior art during to the higher temperature Medium Measurement, when environment temperature is lower than zero degree, need accompany this deficiency of the extra energy of heat rejection, provide a kind of kapillary that when measuring, does not need to accompany heat, high and low pressure side to be arranged on the differential diaphragm hermetically-sealed construction of the transmitter in the same insulating tube.
The technical solution of the utility model: the differential diaphragm hermetically-sealed construction of transmitter, comprise transmitter measuring head, pressure-sensitive head and protection flexible pipe, the transmitter measuring head is connected by the protection flexible pipe with the pressure-sensitive head, it is characterized in that: in the middle of the pressure-sensitive head is the bellows body, high-pressure side room and low-pressure side room are set in the described bellows body, be provided with high-pressure side entrance pressure mouth, autoclave diaphragm and high pressure side capillary tube in the room of high-pressure side, high pressure side capillary tube is connected with the cavity volume that autoclave diaphragm and bellows body form; Be provided with low pressure end entrance pressure mouth, low pressure diaphragm and low pressure side capillary tube in the low-pressure side room, low pressure side capillary tube is connected with the cavity volume that low pressure diaphragm and bellows body form; High pressure side capillary tube and low pressure side capillary tube all are arranged in the protection flexible pipe.
Further feature is: at the connecting portion of protection flexible pipe and transmitter measuring head, the first protection housing is set, in the first protection housing is enclosed in high pressure side capillary tube, low pressure side capillary tube and protection tube.
At the connecting portion of protection flexible pipe and pressure-sensitive head, the second protection housing is set, in the second protection housing is enclosed in high pressure side capillary tube, low pressure side capillary tube and protection tube.
The differential diaphragm hermetically-sealed construction of the utility model transmitter with respect to prior art, has following characteristics:
1, do not need to accompany heat with regard to energy measurement, extra heating, insulation construction are not set, reduced operation cost.
2, the kapillary of high and low pressure side is arranged in the same insulating tube, has reduced the influence of the variation of ambient temperature to measurement result, improves the accuracy of measurement result.
3, owing to do not need companion's heat, just not needing to consume the extra energy to produce heat, is a kind of measurement mechanism of energy-saving and environmental protection.
Description of drawings
Fig. 1 is the utility model structure of transmitter synoptic diagram;
Fig. 2 be Fig. 1 along A-A to cut-open view;
Fig. 3 be Fig. 1 along B-B to cut-open view;
Fig. 4 be Fig. 1 along C-C to cut-open view.
Embodiment
In Fig. 1,2,3,4, the differential diaphragm hermetically-sealed construction of the utility model transmitter comprises transmitter measuring head 1, pressure-sensitive 2 and protection flexible pipe 3, and transmitter measuring head 1 and pressure-sensitive 2 are connected by protection flexible pipe 3; Improvement of the present utility model is: pressure-sensitive 2 centre are bellows bodies 21, high-pressure side room 4 and low-pressure side room 5 are set in the described bellows body 21, specifically formed by 5 pairs of folders of high-pressure side room 4 and low-pressure side room (connection), high-pressure side room 4 and low-pressure side room 5 are respectively in the both sides of pressure-sensitive 2.In high-pressure side room 4, be provided with high-pressure side entrance pressure mouth 6, autoclave diaphragm 7 and high pressure side capillary tube 8, high pressure side capillary tube 8 is connected with the cavity volume that autoclave diaphragm 7 and bellows body 21 form, and fills to measure in high pressure side capillary tube 8 and uses liquid; In low-pressure side room 5, be provided with low pressure end entrance pressure mouth 9, low pressure diaphragm 10 and low pressure side capillary tube 11, low pressure side capillary tube 11 is connected with the cavity volume that low pressure diaphragm 10 and bellows body 21 form, fill to measure in low pressure side capillary tube 11 with liquid (can the liquid the same with the high-pressure side), this liquid can adapt to higher medium temperature and lower environment temperature.Medium is respectively from the high-pressure side entrance pressure mouth 6 of high-pressure side room 4 during use, enter with the low pressure end entrance pressure mouth 9 of low-pressure side room 5, act on autoclave diaphragm 7 and the low pressure diaphragm 10, be delivered to transmitter measuring head 1 by the filling liquid in the high pressure side capillary tube 8 that is attached thereto and the low pressure side capillary tube 11, through one of conversion output and the corresponding appropriate current signal of pressure reduction.High pressure side capillary tube 8 and low pressure side capillary tube 11 all are arranged in the protection flexible pipe 3, make both be in identical temperature environment, have offset the measuring error that temperature variation causes, have improved the precision of measuring.And, the connection size of the entrance pressure mouth 6 of room 4 and the entrance pressure mouth 9 of room 5 and usual pressure transmitter to connect size identical, can not increase extra installation cost.During measurement, pressure-sensitive 2 contacts with medium, and pressure-sensitive 2 separates with transmitter measuring head 1, and is middle continuous by the high pressure side capillary tube 8, the low pressure side capillary tube 11 that are arranged in the protection flexible pipe 3.
In order to carry and the fitting operation convenience; also in order to protect high pressure side capillary tube 8, low pressure side capillary tube 11 and protection flexible pipe 3; connecting portion in protection flexible pipe 3 and transmitter measuring head 1, pressure-sensitive 2; the first protection housing 12 and the second protection housing 13 are set respectively; in the first protection housing 12, the second protection housing 13 all are enclosed in high pressure side capillary tube 8, low pressure side capillary tube 11 and protection tube 3, play a protective role.
Claims (3)
1. the differential diaphragm hermetically-sealed construction of transmitter, comprise transmitter measuring head (1), pressure-sensitive head (2) and protection flexible pipe (3), transmitter measuring head (1) is connected by protection flexible pipe (3) with pressure-sensitive head (2), it is characterized in that: in the middle of the pressure-sensitive head (2) is bellows body (21), high-pressure side room (4) and low-pressure side room (5) are set in the described bellows body (21), in high-pressure side room (4), be provided with high-pressure side entrance pressure mouth (6), autoclave diaphragm (7) and high pressure side capillary tube (8), high pressure side capillary tube (8) is connected with the cavity volume that autoclave diaphragm (7) and bellows body (21) form; Be provided with low pressure end entrance pressure mouth (9), low pressure diaphragm (10) and low pressure side capillary tube (11) in low-pressure side room (5), low pressure side capillary tube (11) is connected with the cavity volume that low pressure diaphragm (10) and bellows body (21) form; High pressure side capillary tube (8) and low pressure side capillary tube (11) all are arranged in the protection flexible pipe (3).
2. according to the differential diaphragm hermetically-sealed construction of the described transmitter of claim 1; it is characterized in that: at the connecting portion of protection flexible pipe (3) and transmitter measuring head (1); the first protection housing (12) is set, in the first protection housing (12) is enclosed in high pressure side capillary tube (8), low pressure side capillary tube (11) and protection tube (3).
3. according to the differential diaphragm hermetically-sealed construction of claim 1 or 2 described transmitters; it is characterized in that: at the connecting portion of protection flexible pipe (3) and pressure-sensitive head (2); the second protection housing (13) is set, in the second protection housing (13) is enclosed in high pressure side capillary tube (8), low pressure side capillary tube (11) and protection tube (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206090564U CN201867278U (en) | 2010-11-16 | 2010-11-16 | Differential pressure diaphragm seal structure of transmitting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206090564U CN201867278U (en) | 2010-11-16 | 2010-11-16 | Differential pressure diaphragm seal structure of transmitting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201867278U true CN201867278U (en) | 2011-06-15 |
Family
ID=44138430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206090564U Expired - Lifetime CN201867278U (en) | 2010-11-16 | 2010-11-16 | Differential pressure diaphragm seal structure of transmitting instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201867278U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148650A (en) * | 2013-03-08 | 2013-06-12 | 上虞市诚信机电科技有限公司 | Thermostatic expansion valve for air conditioner |
| CN109029632A (en) * | 2018-10-09 | 2018-12-18 | 洛阳源和科技有限公司 | A kind of differential pressure controller and measurement method for level sensing |
-
2010
- 2010-11-16 CN CN2010206090564U patent/CN201867278U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148650A (en) * | 2013-03-08 | 2013-06-12 | 上虞市诚信机电科技有限公司 | Thermostatic expansion valve for air conditioner |
| CN109029632A (en) * | 2018-10-09 | 2018-12-18 | 洛阳源和科技有限公司 | A kind of differential pressure controller and measurement method for level sensing |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110615 |