CN201497528U - Anti-freeze differential pressure type flow meter without heat tracing - Google Patents
Anti-freeze differential pressure type flow meter without heat tracing Download PDFInfo
- Publication number
- CN201497528U CN201497528U CN2009203046694U CN200920304669U CN201497528U CN 201497528 U CN201497528 U CN 201497528U CN 2009203046694 U CN2009203046694 U CN 2009203046694U CN 200920304669 U CN200920304669 U CN 200920304669U CN 201497528 U CN201497528 U CN 201497528U
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- pressure
- differential pressure
- valve
- flow meter
- freeze
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Abstract
The utility model relates to an anti-freeze differential pressure type flow meter without heat tracing, which comprises a differential pressure type flow sensor, a pressure taking and liquid filling valve group, a pressure guide pipeline, an adapter plate or a three-valve group plate, a differential pressure transmitter and the like, and is characterized in that the pressure guide pipeline as well as a positive pressure chamber and a negative pressure chamber of the differential pressure transmitter are fully filled with anti-freeze liquid injected by a liquid filling valve; and the pressure taking and liquid filling valve group is formed by combining a pressure taking stop valve and the liquid filling valve. By adopting the technical scheme, the anti-freeze differential pressure type flow meter effectively preventing liquid in a measuring medium from entering a positive capacitance chamber and a negative capacitance chamber of a pressure guide pipe valve part and the differential pressure transmitter, so that a heat tracing system is not needed to be arranged on the pressure guide pipeline, the adapter plate or the three-valve group plate, and the differential pressure transmitter, and the differential pressure type flow meter can be ensured to normally operate in the low temperature environment. The flow meter has simple structure and convenient use, effectively prevents the liquid inside the pressure guide pipeline, the valve part and the positive pressure chamber and the negative pressure chamber of the differential pressure transmitter from being frozen at the low temperature, ensures the differential pressure type flow meter to normally operate in the low temperature environment, and has wide application range.
Description
Technical field
The utility model relates to a kind of flow measurement device, specifically is that a kind of nothing is accompanied hot anti-freeze differential pressure flowmeter.
Background technology
Existing differential pressure flowmeter includes differential pressure flow sensor, valve, pilot pipeline, card extender or three valve groups, a differential pressure transmitter etc.In use, when the temperature of flowmeter environment of living in is lower than the measuring media freezing point temperature, the liquid in the positive negative pressure chamber of connecting pipe valve member and differential pressure transmitter will solidify, expand, and cause the flowmeter operation not normal, and connecting pipe valve member and differential pressure transmitter damage.For preventing that liquid from freezing, must or use the diaphragm type double flanges differential pressure transmitter instead to enforcements such as pilot pipeline and valve member, differential pressure transmitter companion heat, they have increased engineering cost, maintenance cost, energy resource consumption and corresponding cost, use diaphragm type double flanges differential pressure transmitter acquisition expenses instead and are multiplied especially.
Summary of the invention
The purpose of this utility model just provides a kind of differential pressure flowmeter that does not have the hot anti-freeze of companion.It can prevent effectively that liquid in the measuring media is connecting pipe valve member and indoor the freezing of the positive negative pressure of differential pressure transmitter, and need not to lay companion's heat, simplified system's formation, improved the reliability of system, reduced engineering cost, maintenance cost has been eliminated companion's heat and energy expenditure, has guaranteed the normal operation of differential pressure flowmeter in low temperature environment.
The purpose of this utility model is to realize by such technical scheme, it comprises differential pressure flow sensor, pressure stop valve, pilot pipeline, card extender or three valve group plates, differential pressure transmitter, it is characterized in that: the positive negative pressure chamber of described pilot pipeline and differential pressure transmitter is full of the anti freezing solution that is injected by prefill valve, the pressure guide hole of described prefill valve and pressure stop valve and pilot pipeline connection.
Owing to adopted technique scheme, the utility model has effectively been blocked the liquid in the measuring media and has been entered connecting pipe valve member and the positive and negative room of differential pressure transmitter, no longer, guaranteed the normal operation of differential pressure flowmeter in low temperature environment to pilot pipeline laying tracing system.
Through pressure and prefill valve group anti freezing solution is injected, this anti freezing solution does not have the situation that the companion can not occur freezing when hot at low temperatures, has guaranteed the transmission of differential pressure signal in the pilot pipeline, thereby has guaranteed the normal operation of differential pressure flowmeter in low temperature environment.
Description of drawings
Said structure of the present utility model can further specify by the enforcement example that accompanying drawing provides.
The utility model has following accompanying drawing:
Accompanying drawing 2 is measured the structural representation of implementing example for the utility model is used for horizontal pipe:
Accompanying drawing 3 is the synoptic diagram of pressure and prefill valve group;
The A-A cut-open view of accompanying drawing 4 Fig. 3 when being applicable to measuring media density than the high situation of anti freezing solution density;
Accompanying drawing 5 cuts open figure for the B-B rank of Fig. 4;
Accompanying drawing 6 is the A-A cut-open view of Fig. 3 when being applicable to measuring media density than the low density situation of anti freezing solution;
Accompanying drawing 7 cuts open figure for the B-B rank of Fig. 6.
Among the figure: the 1-differential pressure flow sensor; 2-pressure and prefill valve group; 2.1-prefill valve; 2.2-the topping up hole of band needle; 2.3-pressure stop valve; 2.4-vent port; 2.5-pressure guide hole; 2.6-pressure port; 3-pilot pipeline; 4-card extender or three valve group plates; The 5-differential pressure transmitter.
Embodiment
Accompany hot anti-freeze differential pressure flowmeter referring to the nothing of accompanying drawing 1 and accompanying drawing 2, comprise differential pressure flow sensor 1, pressure stop valve 2.3, pilot pipeline 3, card extender or three valve group plates 4, differential pressure transmitter 5, it is characterized in that: the positive negative pressure chamber of described pilot pipeline 3 and differential pressure transmitter 5 is full of the anti freezing solution that is injected by prefill valve 2.1, and described prefill valve 2.1 is communicated with the pressure guide hole 2.5 and the pilot pipeline 3 of pressure stop valve 2.3.
Above-mentioned pressure stop valve 2.3 and prefill valve 2.1 are combined into one and constitute pressure and prefill valve group 2; Prefill valve vertically is installed on the pressure stop valve valve body, and the topping up hole 2.2 of its band needle is communicated with pressure guide hole 2.5, has vent port 2.4 on the prefill valve; The height of described pressure guide hole 2.5 can be higher or lower than the height of pressure port 2.6; Being communicated with and blocking of pressure guide hole 2.5 and pressure port 2.6 is by 2.3 controls of pressure stop valve.
When injecting anti freezing solution, close the pressure stop valve, open the topping up needle; Fluid injection finishes, and closes the topping up needle, opens the pressure stop valve.Because the effect of atmospheric pressure or working condition pressure, anti freezing solution can not enter in the differential pressure flow sensor.
The utility model adopts simple process structure, has guaranteed the normal operation of differential pressure flowmeter in low temperature environment.Use is originally novel to have: simple in structure, need not tracing system, and reduced engineering cost, maintenance cost, energy resource consumption and corresponding expense; Can be according to the kind of environment for use temperature and measuring media kind change anti freezing solution.The utility model can also be used for the flow measurement of various industry high temperature, high viscosity, strong corrosive medium except being used for the flow measurement of the low regional water and steam medium of northern temperature.
Claims (2)
1. one kind is not had the hot anti-freeze differential pressure flowmeter of companion, comprise differential pressure flow sensor (1), pressure stop valve (2.3), pilot pipeline (3), card extender or three valve group plates (4), differential pressure transmitter (5), it is characterized in that: the positive negative pressure chamber of described pilot pipeline (3) and differential pressure transmitter (5) is full of the anti freezing solution that is injected by prefill valve (2.1), and described prefill valve (2.1) is communicated with the pressure guide hole (2.5) and the pilot pipeline (3) of pressure stop valve (2.3).
2. nothing according to claim 1 is accompanied hot anti-freeze differential pressure flowmeter, it is characterized in that: pressure stop valve (2.3) and prefill valve (2.1) are combined into one and constitute pressure and prefill valve group (2); Prefill valve vertically is installed on the pressure stop valve valve body, and the topping up hole (2.2) of its band needle is communicated with pressure guide hole (2.5), has vent port (2.4) on the prefill valve; The height of described pressure guide hole (2.5) can be higher or lower than the height of pressure port (2.6); Being communicated with and blocking of pressure guide hole (2.5) and pressure port (2.6) controlled by pressure stop valve (2.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203046694U CN201497528U (en) | 2009-06-18 | 2009-06-18 | Anti-freeze differential pressure type flow meter without heat tracing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203046694U CN201497528U (en) | 2009-06-18 | 2009-06-18 | Anti-freeze differential pressure type flow meter without heat tracing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201497528U true CN201497528U (en) | 2010-06-02 |
Family
ID=42440732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203046694U Expired - Fee Related CN201497528U (en) | 2009-06-18 | 2009-06-18 | Anti-freeze differential pressure type flow meter without heat tracing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201497528U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519543A (en) * | 2011-12-14 | 2012-06-27 | 张家港圣汇气体化工装备有限公司 | Pressure detection device of differential pressure levelmeter for cryogenic liquid storage tank |
| CN108007508A (en) * | 2018-01-09 | 2018-05-08 | 上海科洋科技股份有限公司 | A kind of differential flow measuring device |
| CN112858096A (en) * | 2021-01-29 | 2021-05-28 | 晨光生物科技集团股份有限公司 | Differential pressure type densimeter measuring and protecting device |
-
2009
- 2009-06-18 CN CN2009203046694U patent/CN201497528U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519543A (en) * | 2011-12-14 | 2012-06-27 | 张家港圣汇气体化工装备有限公司 | Pressure detection device of differential pressure levelmeter for cryogenic liquid storage tank |
| CN102519543B (en) * | 2011-12-14 | 2013-02-13 | 张家港圣汇气体化工装备有限公司 | Pressure detection device of differential pressure levelmeter for cryogenic liquid storage tank |
| CN108007508A (en) * | 2018-01-09 | 2018-05-08 | 上海科洋科技股份有限公司 | A kind of differential flow measuring device |
| CN112858096A (en) * | 2021-01-29 | 2021-05-28 | 晨光生物科技集团股份有限公司 | Differential pressure type densimeter measuring and protecting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20100618 |