CN204165629U - The compare device of discharge and differential water pressures - Google Patents
The compare device of discharge and differential water pressures Download PDFInfo
- Publication number
- CN204165629U CN204165629U CN201420599262.XU CN201420599262U CN204165629U CN 204165629 U CN204165629 U CN 204165629U CN 201420599262 U CN201420599262 U CN 201420599262U CN 204165629 U CN204165629 U CN 204165629U
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- fluid flow
- flow tube
- water
- tensimeter
- water inlet
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Abstract
The compare device that the utility model discloses a kind of discharge and differential water pressures comprises fluid flow tube, water delivering orifice tensimeter, water inlet tensimeter, the normal flow be arranged on fluid flow tube takes into account the variable frequency pump of connecting with fluid flow tube, the water inlet of fluid flow tube is used for being connected with water pipe line water inlet pipe, the water delivering orifice of fluid flow tube is used for being connected with water pipe line water-supply-pipe, water inlet tensimeter is arranged on fluid flow tube, and between proving flowmeter and fluid flow tube water inlet, water delivering orifice tensimeter is arranged on fluid flow tube, and between proving flowmeter and fluid flow tube water delivering orifice, fluid flow tube offers the first external tapping being positioned at water inlet tensimeter place, fluid flow tube offers the second external tapping being positioned at water delivering orifice tensimeter place, the distance of proving flowmeter and the second external tapping is more than or equal to 6 times of proving flowmeter measured hole diameter.This compare device can judge flowmeter and pressure reduction converter, and whether measurement result is correct after mounting.
Description
Technical field
The utility model relates to unit test systems technology field, particularly the compare device of a kind of discharge and differential water pressures.
Background technology
As everyone knows, because specific heat of water holds comparatively large, water is usually used in being widely used as the medium of a kind of heat-carrying or refrigerating, such as air-conditioning by water as the media implementation refrigeration of refrigerating or heat-carrying or the function that heats.When air-conditioning dispatches from the factory, discharge when its nameplate parameter can be indicated air-conditioning proper motion and inner differential water pressures, thus for selecting the flow and lift size of variable frequency pump to provide data foundation in the actual use of user.
The development phase of air-conditioning, differential water pressures transmitter test unit inside water pressure was poor mainly through testing flow meter discharge.In relevant national standard the accuracy requirement of regulation flowmeter be deviation be less than ± 2.0%, differential water pressures transmitter's precision require for deviation be less than ± 1.0%, the measured value deviation of discharge and differential water pressures for being less than ± 5%, if measured value deviation has a strong impact on the performance of air-conditioning compared with senior general, verify so regularly flowmeter and differential water pressures transmitter should be delivered to metering institute, flowmeter and differential water pressures transmitter are installed on water system test water pipe line after verification completes, may occur that installation site is inaccurate in installation or use procedure, wiring is wrong, signal disturbing, flowmeter, the fault of differential water pressures transmitter own, the more impurity of water pipe line results in blockage, the various problems such as air are had in water pipe line, thus cause the test value of flowmeter and differential water pressures transmitter incorrect, but not to the device that the flowmeter after installing and the measured value of differential water pressures transmitter verify in conventional art, whether measurement result is correct after mounting cannot to judge flowmeter and differential pressure transmitter.
Therefore, whether measurement result is correct after mounting how to judge flowmeter and differential water pressures transmitter, is those skilled in the art's technical matterss urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is to provide the compare device of a kind of discharge and differential water pressures, and this compare device can judge flowmeter and pressure reduction converter, and whether measurement result is correct after mounting.
For achieving the above object, the utility model provides the compare device of a kind of discharge and differential water pressures, comprise fluid flow tube, water delivering orifice tensimeter, water inlet tensimeter, the normal flow be arranged on described fluid flow tube takes into account the variable frequency pump of connecting with described fluid flow tube, the water inlet of described fluid flow tube is used for being connected with water pipe line water inlet pipe, the water delivering orifice of described fluid flow tube is used for being connected with water pipe line rising pipe, described water inlet tensimeter is arranged on described fluid flow tube, and between described proving flowmeter and described fluid flow tube water inlet, described water delivering orifice tensimeter is arranged on described fluid flow tube, and between described proving flowmeter and described fluid flow tube water delivering orifice, described fluid flow tube offers the first external tapping being positioned at described water inlet tensimeter place, described fluid flow tube offers the second external tapping being positioned at described water delivering orifice tensimeter place, the distance of described proving flowmeter and described second external tapping is more than or equal to 6 times of described proving flowmeter measured hole diameter.
Preferably, also comprise the first filtrator, described first filtrator is arranged on described fluid flow tube, and between fluid flow tube water inlet and described first external tapping, distance between described fluid flow tube water inlet and described first filtrator is more than or equal to 4 times of described fluid flow tube diameter, and described first filtrator and the distance between described first external tapping and described water inlet tensimeter are more than or equal to 4 times of described fluid flow tube diameter.
Preferably, also comprise and be arranged on described fluid flow tube, and the second filtrator between described water inlet tensimeter and described proving flowmeter, distance between described second filtrator and described water inlet tensimeter is more than or equal to 4 times of described fluid flow tube diameter, and the distance between described proving flowmeter and described second filtrator is more than or equal to 12 times of described fluid flow tube diameter.
Preferably, described first filtrator and/or described second filtrator are the detachable screen pack installed.
Preferably, the order number of described first filtrator is greater than the order number of described second filtrator.
Preferably, also comprise bracing frame, described fluid flow tube, described water delivering orifice tensimeter, described water inlet tensimeter, described proving flowmeter, described second filtrator and described second filtrator are installed on support frame as described above.
Preferably, the shifting roller being arranged on support frame as described above bottom is also comprised.
Preferably, described shifting roller is strap brake shifting roller.
Preferably, the pipeline diameter of described fluid flow tube and described proving flowmeter is equal.
Preferably, the pipeline of described fluid flow tube and described proving flowmeter is stainless steel pipeline.
In technique scheme, the compare device of the discharge that the utility model provides and differential water pressures comprises fluid flow tube, water delivering orifice tensimeter, water inlet tensimeter, the normal flow be arranged on fluid flow tube takes into account the variable frequency pump of connecting with fluid flow tube, the water inlet of fluid flow tube is used for being connected with water pipe line water inlet pipe, the water delivering orifice of fluid flow tube is used for being connected with water pipe line water-supply-pipe, water inlet tensimeter is arranged on fluid flow tube, and between proving flowmeter and fluid flow tube water inlet, water delivering orifice tensimeter is arranged on fluid flow tube, and between proving flowmeter and fluid flow tube water delivering orifice, fluid flow tube offers the first external tapping being positioned at water inlet tensimeter place, fluid flow tube offers the second external tapping being positioned at water delivering orifice tensimeter place, the distance of proving flowmeter and the second external tapping is more than or equal to 6 times of proving flowmeter measured hole diameter.When staff needs to test the flowmeter of installation and differential water pressures transmitter, first in laboratory, the water inlet of fluid flow tube is connected with laboratory water pipe line water inlet pipe, fluid flow tube water delivering orifice is connected with laboratory water pipe line rising pipe, and first external tapping of this compare device is all connected with standard water pressure difference transmitter with the second external tapping.The indoor normal pipeline of differential water pressures transmitter to fluid flow tube, differential water pressures transmitter carries out emptying by experiment, power lead is connected with proving flowmeter and powers, open the circulation variable frequency pump of water pipe line, and regulate variable frequency pump operating frequency, during several predetermined point value of record standard flowmeter correspondence of maximum flow in measurement range, numerical value corresponding on the differential water pressures of record differential water pressures transmitter display and water inlet tensimeter and water delivering orifice tensimeter.Then this compare device is connected with the water pipe line of field device, makes the flowmeter of compare device reach the predetermined point value of above-mentioned record, now record the corresponding numerical value of field device flow meter.When field device flow meter numerical value and compare device's normal flow count value contrast in error allowed band, illustrate that the flowmeter survey of field device is accurate; If field device flow meter numerical value and compare device's normal flow count value contrast outside error allowed band, field device flowmeter survey mistake is described.If water inlet tensimeter and the manometric numerical value of water delivering orifice and the proving flowmeter of laboratory compare device before reach the water inlet tensimeter and water delivering orifice tensimeter numerical value that record in the predetermined point value of above-mentioned record within the scope of permissible error, illustrate that the hydraulic pressure difference that differential water pressures transmitter is measured is correct, can normally use; If water inlet tensimeter and the manometric numerical value of water delivering orifice and the proving flowmeter of laboratory compare device before reach the water inlet tensimeter that records in the predetermined point value of above-mentioned record and water delivering orifice tensimeter numerical value contrasts outside error allowed band, the hydraulic pressure difference mistake that differential water pressures transmitter is measured is described.
Known by foregoing description, in the discharge provided at the utility model and the compare device of differential water pressures, by arranging proving flowmeter, water inlet tensimeter and water delivering orifice tensimeter and carry out the exact value of Laboratory Calibration and in-site measurement numerical value being compared, whether the flow after can checking installation fast takes into account differential water pressures transmitter measurement result correct.
Accompanying drawing explanation
The structural representation of the compare device of the discharge that Fig. 1 provides for the utility model embodiment and differential water pressures.
Wherein in Fig. 1: 1-water inlet connection, 2-first filtrator, 3-first differential water pressures joint, 4-water inlet tensimeter, 5-second filtrator, 6-fluid flow tube, 7-flowmeter, 8-water delivering orifice tensimeter, 9-second differential water pressures joint, 10-water outlet joint, 11-bracing frame.
Embodiment
Core of the present utility model is to provide the compare device of a kind of discharge and differential water pressures, and this compare device can judge flowmeter and pressure reduction converter, and whether measurement result is correct after mounting.
In order to make those skilled in the art understand the technical solution of the utility model better, below in conjunction with drawings and embodiments, the utility model is described in further detail.
Please refer to Fig. 1, in a kind of embodiment, the compare device of the discharge that the utility model provides and differential water pressures comprises fluid flow tube 6, water delivering orifice tensimeter 8, water inlet tensimeter 4, the variable frequency pump being arranged on the proving flowmeter 7 on fluid flow tube 6 and connecting with fluid flow tube 6, in order to improve measuring accuracy further, preferably, water inlet tensimeter 4 and water delivering orifice tensimeter 8 are high-precision pressure gauge, the water inlet end of fluid flow tube 6 is used for being connected with water pipe line water inlet pipe, the water side of fluid flow tube 6 is used for being connected with water pipe line water-supply-pipe, water inlet tensimeter 4 is arranged on fluid flow tube 6, and between proving flowmeter 7 and fluid flow tube 6 water inlet, water delivering orifice tensimeter 8 is arranged on fluid flow tube 6, and between proving flowmeter 7 and fluid flow tube 6 water delivering orifice, fluid flow tube 6 offers the first external tapping being positioned at water inlet tensimeter 4 place, fluid flow tube 6 offers the second external tapping being positioned at water delivering orifice tensimeter 8 place, the distance of proving flowmeter 7 and the second external tapping is more than or equal to 6 times of proving flowmeter 7 measured hole diameter.For the ease of this compare device of staff's Fast Installation, preferably, the water inlet of fluid flow tube 6 is provided with water inlet connection 1, and the water delivering orifice of fluid flow tube 6 is provided with water outlet joint 10.Distance between water outlet joint 10 and the second external tapping is more than or equal to 4 times of diameters of hydraulic tube.For the ease of being connected with external device, the first external tapping and the second external tapping place arrange the first differential water pressures joint 3 and the second differential water pressures joint 9.In order to improve the strength of joint of each parts of compare device, preferably, proving flowmeter 7 two ends and fluid flow tube 6 are by spacing Flange joint.
When staff needs to test the flowmeter of installation and differential water pressures transmitter, first in laboratory, the water inlet of fluid flow tube 6 is connected with laboratory water pipe line water inlet pipe, and fluid flow tube 6 water delivering orifice is connected the first external tapping that this compare device connects with laboratory water pipe line rising pipe and the second external tapping is all connected with differential water pressures transmitter.Indoor normal differential water pressures transmitter is to fluid flow tube 6 by experiment, the pipeline of differential water pressures transmitter carries out emptying, power lead is connected with proving flowmeter 7 and powers, open the circulation variable frequency pump of water pipe line, and regulate variable frequency pump operating frequency, during several predetermined point value of record standard flowmeter 7 correspondence of maximum flow in measurement range, concrete, the discharge flowed through is selected to meet 100% of maximum flow in proving flowmeter 7 measurement range respectively, 75%, 50%, 25%, 15%, 10%, 6 points of 5%, certainly other point value is selected also can, numerical value corresponding on the differential water pressures of record differential water pressures transmitter display and water inlet tensimeter 4 and water delivering orifice tensimeter 8.Then this compare device is connected with the water pipe line of field device, makes the proving flowmeter 7 of compare device reach the predetermined point value of above-mentioned record, now record the corresponding numerical value of field device flow meter.When field device flow meter numerical value and compare device's flowmeter numerical value contrast in error allowed band, illustrate that the flowmeter survey result of field device is correct; If proving flowmeter 7 numerical value and compare device's flowmeter numerical value are outside permissible error scope on field device, field device flowmeter survey erroneous results is described.If the numerical value of water inlet tensimeter 4 and water delivering orifice tensimeter 8 and the proving flowmeter 7 of laboratory compare device before reach the water inlet tensimeter and water delivering orifice tensimeter 8 numerical value that record in the predetermined point value of above-mentioned record within the scope of permissible error, differential water pressures transmitter and annexation thereof are described correctly, can normally use; If the numerical value of water inlet tensimeter 4 and water delivering orifice tensimeter 8 and the proving flowmeter 7 of laboratory compare device before reach the water inlet tensimeter that records in the predetermined point value of above-mentioned record and water delivering orifice tensimeter 8 numerical value contrasts outside error allowed band, differential water pressures transmitter measurement result mistake is described.In order to improve the accuracy that compare device measures, before each compare device measures, preferably the pipeline of liquid process in whole device is cleaned.
Known by foregoing description, in the discharge provided at the utility model specific embodiment and the compare device of differential water pressures, by arranging proving flowmeter 7, water inlet tensimeter 4 and water delivering orifice tensimeter 8 and carry out the exact value of Laboratory Calibration and in-site measurement numerical value being compared, also can water inlet tensimeter 4 and water delivering orifice tensimeter 8 difference contrast, can check fast the discharge of the flowmeter of installation and differential water pressures transmitter measurement result whether correct.
Further, this compare device also comprises the first filtrator 2, wherein the first filtrator 2 is arranged on fluid flow tube 6, and between fluid flow tube 6 water inlet and the first external tapping, wherein the first filtrator 2 can be arranged on fluid flow tube 6 about differential water pressures 50kPa and locates, distance between fluid flow tube 6 water inlet and described first filtrator 2 is more than or equal to 4 times of described fluid flow tube 6 diameter, and the first filtrator 2 and the distance between the first external tapping and water inlet tensimeter 4 are more than or equal to 4 times of fluid flow tube 6 diameter.Clean the first filtrator 2 for the ease of staff, preferably, the first filtrator 2 is the detachable screen pack installed.In order to avoid the sudden change of joint pipeline diameter causes liquid perturbation, preferably, the distance between water inlet connection 1 and the first filtrator 2 is more than or equal to 4 times of fluid flow tube 6 diameter, and what wherein fluid flow tube 6 diameter all referred to is fluid flow tube 6 inner surface diameter.By arranging the first filtrator 2, avoiding entering in the liquid of compare device and may damage instrument by impurity containing footpath grain is larger, and causing measuring inaccurate situation, further increasing the measuring accuracy of compare device, effectively extend the serviceable life of compare device.
Further, this compare device also comprises and is arranged on fluid flow tube 6, and the second filtrator 5 between water inlet tensimeter 4 and proving flowmeter 7, wherein the second filtrator 5 can be arranged on fluid flow tube 6 about differential water pressures 150kpa and locates, and the distance wherein between the second filtrator 5 and water inlet tensimeter 4 is more than or equal to 4 times of fluid flow tube 6 diameter.Cleaning the second filtrator 5, second filtrator 5 for the ease of staff is the detachable screen pack installed.In order to avoid affecting proving flowmeter 7 numerical accuracy through the water of the second filtrator 5, the distance between preferred standard flowmeter 7 and the second filtrator 5 is more than or equal to 12 times of fluid flow tube 6 diameter.By arranging the second filtrator 5, avoiding impurity to enter in the instrument of compare device further, further increasing the measuring accuracy of compare device, more effectively extending the serviceable life of compare device.
In order to avoid compare device's cost increases, preferably, the order number of the first filtrator 2 is greater than the order number of the second filtrator 5.When liquid stream is through the first filtrator 2, can directly large granular impurity be filtered.When the second filtrator 5 order number is larger, disturbance during effective minimizing liquid flow, improves the measuring accuracy of proving flowmeter 7.
Further, this compare device also comprises bracing frame 11, and fluid flow tube 6, water delivering orifice tensimeter 8, water inlet tensimeter 4, proving flowmeter 7, second filtrator 5 and the second filtrator 5 are installed on bracing frame 11.By arranging bracing frame 11, being convenient to staff's integral shift compare device, effectively improve the serviceable life of compare device.And enable compare device's steady operation, further improve the measuring accuracy of compare device.
Move the labour intensity of compare device to reduce staff, preferably, this compare device also comprises the shifting roller being arranged on bracing frame 11 bottom, and wherein shifting roller can be traditional roller.By arranging shifting roller, staff only need promote bracing frame 11, and fluid flow tube 6, water delivering orifice tensimeter 8, water inlet tensimeter 4, proving flowmeter 7, second filtrator 5 and the second filtrator 5 just can be driven to move.
In order to improve the measuring accuracy of compare device further, preferably, shifting roller is strap brake shifting roller.Because shifting roller is strap brake shifting roller, when compare device operationally, strap brake shifting roller is in braking state, the situation of movement when avoiding compare device in working order.
On the basis of above-mentioned each scheme, preferably, the pipeline diameter of fluid flow tube 6 and proving flowmeter 7 is equal.Because the pipeline diameter of fluid flow tube 6 and proving flowmeter 7 is equal, make liquid flow steady further, further increase the measuring accuracy of compare device.
Preferably, the pipeline of fluid flow tube 6 and proving flowmeter 7 is stainless steel pipeline.Because stainless-steel tube material is simple, and not easily get rusty, effectively extend the serviceable life of fluid flow tube 6 and proving flowmeter 7 pipeline.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the compare device of a discharge and differential water pressures, it is characterized in that, comprise fluid flow tube (6), water delivering orifice tensimeter (8), water inlet tensimeter (4), the variable frequency pump being arranged on the proving flowmeter (7) on described fluid flow tube (6) and connecting with described fluid flow tube (6), the water inlet of described fluid flow tube (6) is used for being connected with water pipe line water inlet pipe, the water delivering orifice of described fluid flow tube (6) is used for being connected with water pipe line rising pipe, described water inlet tensimeter (4) is arranged on described fluid flow tube (6), and be positioned between described proving flowmeter (7) and described fluid flow tube (6) water inlet, described water delivering orifice tensimeter (8) is arranged on described fluid flow tube (6), and be positioned between described proving flowmeter (7) and described fluid flow tube (6) water delivering orifice, described fluid flow tube (6) offers the first external tapping being positioned at described water inlet tensimeter (4) place, described fluid flow tube (6) offers the second external tapping being positioned at described water delivering orifice tensimeter (8) place, described proving flowmeter (7) is more than or equal to 6 times of described proving flowmeter (7) measured hole diameter with the distance of described second external tapping.
2. compare device according to claim 1, it is characterized in that, also comprise the first filtrator (2), described first filtrator (2) is arranged on described fluid flow tube (6), and be positioned between fluid flow tube (6) water inlet and described first external tapping, distance between described fluid flow tube (6) water inlet and described first filtrator (2) is more than or equal to 4 times of described fluid flow tube (6) diameter, described first filtrator (2) and the distance between described first external tapping and described water inlet tensimeter (4) are more than or equal to 4 times of described fluid flow tube (6) diameter.
3. compare device according to claim 2, it is characterized in that, also comprise and be arranged on described fluid flow tube (6), and the second filtrator (5) be positioned between described water inlet tensimeter (4) and described proving flowmeter (7), distance between described second filtrator (5) and described water inlet tensimeter (4) is more than or equal to 4 times of described fluid flow tube (6) diameter, and the distance between described proving flowmeter (7) and described second filtrator (5) is more than or equal to 12 times of described fluid flow tube (6) diameter.
4. compare device according to claim 3, is characterized in that, described first filtrator (2) and/or described second filtrator (5) are the detachable screen pack installed.
5. compare device according to claim 3, is characterized in that, the order number of described first filtrator (2) is greater than the order number of described second filtrator (5).
6. compare device according to claim 3, it is characterized in that, also comprise bracing frame (11), described fluid flow tube (6), described water delivering orifice tensimeter (8), described water inlet tensimeter (4), described proving flowmeter (7), described second filtrator (5) and described second filtrator (5) are installed on support frame as described above (11).
7. compare device according to claim 6, is characterized in that, also comprises the shifting roller being arranged on support frame as described above (11) bottom.
8. compare device according to claim 7, is characterized in that, described shifting roller is strap brake shifting roller.
9. the compare device according to any one of claim 1-8, is characterized in that, the pipeline diameter of described fluid flow tube (6) and described proving flowmeter (7) is equal.
10. compare device according to claim 1, is characterized in that, the pipeline of described fluid flow tube (6) and described proving flowmeter (7) is stainless steel pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420599262.XU CN204165629U (en) | 2014-10-16 | 2014-10-16 | The compare device of discharge and differential water pressures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420599262.XU CN204165629U (en) | 2014-10-16 | 2014-10-16 | The compare device of discharge and differential water pressures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204165629U true CN204165629U (en) | 2015-02-18 |
Family
ID=52539308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420599262.XU Expired - Fee Related CN204165629U (en) | 2014-10-16 | 2014-10-16 | The compare device of discharge and differential water pressures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204165629U (en) |
-
2014
- 2014-10-16 CN CN201420599262.XU patent/CN204165629U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20151016 |
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| EXPY | Termination of patent right or utility model |