CN211783706U - Metering device for fluid supply system and fluid supply system - Google Patents
Metering device for fluid supply system and fluid supply system Download PDFInfo
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- CN211783706U CN211783706U CN201922139534.3U CN201922139534U CN211783706U CN 211783706 U CN211783706 U CN 211783706U CN 201922139534 U CN201922139534 U CN 201922139534U CN 211783706 U CN211783706 U CN 211783706U
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Abstract
The utility model discloses a metering device for a fluid supply system, which comprises a fluid source, an inlet pipeline, a first inlet control valve, a second inlet control valve, a metering pump, an outlet pipeline and an outlet control valve; the metering device and the inlet pipeline are connected with the fluid supply system in parallel, and the metering device mainly comprises a primary meter, a secondary meter, a connecting pipeline, a first control valve, a second control valve and a third control valve. The beneficial effects of the utility model are that, fully consider the atmospheric environment can influence the quality of final product to the fluidic pollution in metering device when structural design, consequently, adopt the two-stage counter among this technical scheme, to supplied with fluid protection scheme complete among the structural design, whole journey avoids fluid and ambient atmosphere direct contact, has guaranteed the purity of supplying with the fluid.
Description
Technical Field
The present invention relates to a fluid supply system, and more particularly to a metering device for a fluid supply system.
Background
At present, with the development of industry, the flow line production flowers all the time, the application range of the fluid supply system is wider and wider, and the fluid supply system is more indispensable particularly to the fields of metallurgy, environmental protection, chemical industry, medicine and the like.
The fluid supply systems are configured differently due to the different uses of the production line for supplying the fluid. For systems in which the supplied fluid is used for cooling, heating, waste heat utilization and the like, the requirement on the supply amount of the fluid is not very fine, and a common pump capable of meeting the requirement can be used, but for systems in which the supplied fluid is a medicament, especially the amount of the medicament directly determines the proportion of a final product, the requirement on the flow rate is very strict, and the situation is particularly common in the aspects of environmental protection, medicine and chemical industry. Therefore, the supply of such fluids requires the use of metering pumps to ensure accurate and consistent supply per unit time.
In the practical use of a fluid supply system using a metering pump, the fluid supplied from the metering pump is not as accurate as expected, and is changed by the fluctuation of the pressure in the inlet and outlet lines and the influence of the use state of the pump itself, and therefore, a metering device of the fluid supply system is produced.
The metering devices in the market are various in types, but all have simple structures, the pollution of the atmospheric environment and the like to the fluid in the metering devices is not considered, once the pollutants in the atmosphere enter final products along with the fluid, serious irreversible influence is caused to the product quality, and the influence on the products in the fields of medicine and chemical industry is particularly prominent, so that the metering device which has a comprehensive protection scheme for the supplied fluid in the metering calibration process and avoids the atmospheric pollutants from entering is urgently needed in the field.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a fluid protection scheme is complete, and measure among the calibration process fluid can not be with the metering device who is used for fluid feed system of atmospheric pollutants contact.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a metering device for a fluid supply system, said fluid supply system comprising a source of fluid, an inlet conduit, a first inlet control valve, a second inlet control valve, a metering pump, an outlet conduit, an outlet control valve; the metering device with the inlet pipeline connect in parallel in fluid supply system, the metering device both ends are the access mouth respectively and connect the export, the access mouth with the inlet pipeline connect in between first inlet control valve and the second inlet control valve, connect the export with the inlet pipeline connect in between second inlet control valve and measuring pump, metering device includes:
the primary meter is provided with scales or capacity marks and is divided into a metering container with an inlet end and an outlet end, and the inlet end is connected with the inlet pipeline and receives and accommodates the fluid with the preset volume;
the secondary meter is provided with scales or capacity marks and is divided into a metering container with an inlet end and an outlet end, and the inlet end and the outlet end of the secondary meter are respectively connected with the outlet end of the primary meter and the metering pump and receive and contain the fluid with preset volume;
a connecting line for connecting the meter and an inlet line of the fluid supply system;
the first control valve is arranged on a connecting pipeline between the first inlet control valve and the primary meter and is used for controlling whether the fluid enters the primary meter or not;
the second control valve is arranged on a connecting pipeline between the primary meter and the secondary meter and is used for controlling whether the fluid in the primary meter enters the secondary meter or not;
and the third control valve is arranged on a connecting pipeline between the secondary metering device and the metering pump and is used for controlling whether the fluid in the secondary metering device enters the metering pump or not.
The beneficial effects of the utility model are that, compare with traditional metering device, this technical scheme has considered atmospheric environment etc. to the interior fluidic pollution of metering device can influence the quality of final product when structural design, consequently, adopts the two-stage counter among this technical scheme, to supplied with fluid protection scheme week complete in the structural design, whole journey avoids fluid and ambient atmosphere direct contact have guaranteed the purity of supplying with fluid, have promoted the quality of final product.
On the basis of the technical scheme, the following improvements can be made:
firstly, the primary meter is a transparent pipe body, an inner cavity comprises a piston body, the top end of the piston body is provided with a filter, the inner cavity of the primary meter is divided into a liquid cavity at the lower part and a gas cavity at the upper part by the piston body, the piston body can only move between an upper stop position and a lower stop position, the upper stop position and the lower stop position are respectively arranged on the inner wall of the primary meter and are protrusions along the circumferential direction, and the piston body respectively represents the maximum volume and the minimum volume of fluid in the primary meter when being positioned at the upper stop position and the lower stop position; the filter is directly communicated with the atmosphere, so that the solid impurities in the atmosphere can be prevented from entering while the atmosphere is allowed to freely enter and exit the gas cavity of the primary meter. When the metering pump is calibrated, the primary metering device is opened, when the primary metering device is filled with the fluid, the second control valve is opened, the fluid in the primary metering device enters the secondary metering device, when the fluid flowing into the secondary metering device reaches a preset volume, the second control valve is closed, the third control valve is opened, the metering pump is started, the starting time and the time when the fluid level in the secondary metering device is lowered to a preset position are recorded, the supply amount per unit time of the fluid supply system in a single time is calculated according to the result, the process is repeated for multiple times, and the average value of the supply amounts per unit time of the fluid supply system in multiple times is measured to serve as a final determination value; the primary meter is made of transparent materials, so that the control, observation and measurement are convenient; although the provision of a piston body already separates the fluid from the atmosphere, the intake of clean air helps to keep the gas chamber clean.
Further, the maximum volume of the liquid cavity of the primary meter is the same as that of the secondary meter; when all of the fluid in the primary meter enters the secondary meter and the second control valve is closed, the primary meter is recharged with the fluid in preparation for resupplying the secondary meter with the fluid until a predetermined number of times a calibration process is completed. The first-stage metering device and the second-stage metering device are the same in volume, the first-stage metering device is small in volume, the space occupied by the whole metering device is saved, and the fluid supply system is particularly suitable for a fluid supply system with limited installation space.
Furthermore, the maximum volume of the liquid cavity of the primary meter is integral multiple of the maximum volume of the secondary meter, the number of times is consistent with the number of times of supplying the fluid for the metering pump by the secondary meter in the calibration process, and when the metering pump is calibrated, the use of the whole calibration process can be met when the primary meter is filled with the fluid. The technical scheme is suitable for the fluid supply system with abundant installation space of the metering device, can avoid repeatedly opening the first inlet control valve and the first control valve, and simplifies the operation steps.
Furthermore, the second-level meter is a transparent pipe body and is installed in the vertical direction. Through the control of one-level counter to fluid quality and volume, the second grade counter is simple relatively, and is the same with the one-level counter, and the transparent body structure of second grade counter is convenient for observe equally.
Further, the top end of the secondary meter is provided with a switch valve, and the secondary meter is connected with or disconnected from the atmosphere through the switch valve. Under normal conditions, the switch valve is in a closed state, and in the process of calibrating the metering pump, the switch valve is opened by a small angle, the ambient air pressure is conducted into the secondary metering device, and the fluid can smoothly enter and exit the secondary metering device.
Furthermore, a filter is arranged at the top end of the secondary meter and is directly communicated with the atmosphere, so that the solid impurities in the atmosphere can be prevented from entering while the atmosphere is allowed to freely enter and exit the secondary meter. The addition of the filter also avoids direct contact between the fluid in the secondary doser and the atmosphere, and ensures that the gas entering the secondary doser is purified gas.
Preferably, the top of the secondary meter is in a transparent closed form, a vent hole is formed in the side face close to the top end of the secondary meter, a spiral pipe is installed on the vent hole, and the pipe orifice at the other end of the spiral pipe faces downwards. The spiral pipe in the technical scheme can block the atmospheric pollutants in the spiral pipe, and the atmospheric pollutants are prevented from entering the secondary meter, so that a relatively clean environment is created for the secondary meter.
Preferably, the metering device further comprises a blow valve, and the blow valve is arranged at the lowest position of the metering device; the emptying valve is connected with a hose, the other end of the hose is communicated with the fluid source, and when an accident happens, the fluid remained in the metering device flows back to the fluid source through the emptying valve and the hose. The design of the emptying valve is mainly used for exhausting residual fluid in the metering device, so that the residual fluid is prevented from being deteriorated due to too long retention time in the metering device and polluting fluid for next calibration.
Further, a fluid supply system comprises the metering device comprising the emptying valve in the technical scheme. The fluid supply system can calibrate the metering pump in the system at any time according to the requirement, has comprehensive configuration and stable working state, and is convenient for operators to master whether the actual flow rate of the fluid supplied by the system is consistent with the theoretical flow rate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of the system of the present invention.
Fig. 2 is a schematic structural diagram of the one-level meter of the present invention.
Fig. 3 is a schematic structural diagram of an embodiment of the second-stage meter according to the present invention.
Fig. 4 is a schematic structural diagram of a second embodiment of the second-stage meter according to the present invention.
Fig. 5 is a schematic diagram of a third structure of an embodiment of the second-stage meter according to the present invention.
The corresponding part names indicated by the numbers in the figures are as follows:
a fluid source 11; an inlet line 12; a first inlet control valve 13; a second inlet control valve 14; a metering pump 15; an outlet line 16; an outlet control valve 17;
a primary meter 21; a secondary scale 22; a connecting line 23; a first control valve 24; a second control valve 25; a third control valve 26; a blow valve 27; a hose 28;
a primary meter inlet port 211; a primary meter outlet end 212; a primary meter lower stop 213; a primary meter lower stop 214; a piston body 215; a primary meter filter 216;
a secondary meter inlet port 221; a secondary meter outlet end 222; an on-off valve 223; a secondary meter filter 224; a solenoid 225.
Detailed Description
The technical solutions in the embodiments of the present invention will be clear and fully described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
In order to achieve the purpose of the utility model, the utility model provides a technical scheme does:
a metering device for a fluid supply system, as shown in FIG. 1, the fluid supply system comprises a fluid source 11, an inlet line 12, a first inlet control valve 13, a second inlet control valve 14, a metering pump 15, an outlet line 16, an outlet control valve 17; metering device and inlet pipe 12 parallel connection are in fluid supply system, and the metering device both ends are the access mouth respectively and connect the export, and the access mouth is connected between first inlet control valve 13 and second inlet control valve 14 with inlet pipe 12, connects export and inlet pipe 12 to be connected between second inlet control valve 14 and measuring pump 15, and metering device includes:
a primary meter 21 having a scale or volumetric mark and being a metering container divided into an inlet end 211 and an outlet end 212, the inlet end 211 being connected to the inlet pipe 12 and receiving and containing a predetermined volume of fluid;
a secondary meter 22, having a scale or volumetric marking, and being a metering container divided into an inlet end 221 and an outlet end 222, the inlet end 221 and the outlet end 222 of the secondary meter being connected to the outlet end 212 of the primary meter and the metering pump 15, respectively, for receiving and containing a predetermined volume of fluid;
a connecting line 23 for connecting the meters 21,22 and the inlet line 12 of the fluid supply system;
a first control valve 24 provided on the connection line 23 between the first inlet control valve 13 and the primary meter 21 for controlling whether or not the fluid enters the primary meter 21;
a second control valve 25 provided on the connection line 23 between the primary meter 21 and the secondary meter 22 for controlling whether the fluid in the primary meter 21 enters the secondary meter 22;
and a third control valve 26 provided on the connection line 23 between the secondary metering device 22 and the metering pump 15 for controlling whether the fluid in the secondary metering device 22 enters the metering pump 15.
In some embodiments, as shown in fig. 2, the primary scale 21 is a transparent tube, the inner cavity includes a piston body 215, the top end of the piston body is provided with a filter 216, the piston body 215 divides the inner cavity of the primary scale 21 into a lower liquid cavity and an upper gas cavity, and the piston body can only move between an upper stop 214 and a lower stop 213, the upper stop 214 and the lower stop 213 are respectively arranged on the inner wall of the primary scale 21 and are protrusions along the circumferential direction, and the piston body 215 represents the maximum volume and the minimum volume of the fluid in the primary scale 21 when located at the upper stop 214 and the lower stop 213 respectively; the filter 216 is directly connected to the atmosphere, allowing free ingress and egress of the atmosphere into and out of the gas chamber of the primary meter 21 while blocking the ingress of solid impurities from the atmosphere. When the metering pump 15 is calibrated, the primary metering device 21 is opened, when the primary metering device 21 is filled with fluid, the second control valve 25 is opened, the fluid in the primary metering device 21 enters the secondary metering device 22, when the fluid flowing into the secondary metering device 22 reaches a preset volume, the second control valve 25 is closed, the third control valve 26 is opened, the metering pump 15 is started, the starting time and the time when the fluid level in the secondary metering device 22 is lowered to a preset position are recorded, the unit time supply amount of a single fluid supply system is calculated according to the result, the process is repeated for multiple times, and the average value of the unit time supply amounts of the multiple fluid supply systems is measured to serve as a final determination value; the primary meter 21 is made of transparent materials, so that the control, observation and measurement are convenient; while the provision of the piston body 215 has isolated the fluid from the atmosphere, the drawing in of clean air helps to keep the gas chamber clean.
In a preferred embodiment, as shown in FIGS. 1-3, the maximum volume of the liquid chamber of the primary metering device 21 is the same as the maximum volume of the secondary metering device 22; when all of the fluid in the primary meter 21 enters the secondary meter 22 and the second control valve 25 is closed, the primary meter 21 is refilled with fluid in preparation for the secondary meter 22 to be re-supplied with fluid until a predetermined number of times the calibration process is completed. The primary meter 21 and the secondary meter 22 have the same volume, and the primary meter 21 has a smaller volume, so that the space occupied by the whole metering device is saved, and the primary meter 21 is particularly suitable for a fluid supply system with limited installation space.
In another preferred embodiment, as shown in fig. 1-3, the maximum volume of the liquid chamber of the primary metering device 21 is an integer multiple of the maximum volume of the secondary metering device 22, the multiple corresponding to the number of iterations of the primary metering device 22 supplying fluid to the metering pump 15 during a calibration procedure, which is performed when the primary metering device 21 is filled with fluid during a calibration procedure. The technical scheme is suitable for the fluid supply system with abundant installation space of the metering device, can avoid repeatedly opening the first inlet control valve 13 and the first control valve 24, and simplifies the operation steps. In addition, the multiple is preferably not less than 5, and is preferably odd, and if the result is more demanding, one of the highest and one of the lowest values may be eliminated from the calculation and the average is calculated, which is more accurate.
Correspondingly, as shown in fig. 1-5, the secondary scale 22 is a transparent tube and is mounted vertically. Through the control of the primary meter 21 on the mass and volume of the fluid, the secondary meter 22 is relatively simple and is the same as the primary meter 21, and the transparent pipe structure of the secondary meter 22 is also convenient for observation.
In practical use, as shown in fig. 3, the top end of the secondary scale 22 is provided with a switching valve 223 through which the secondary scale 22 is switched on and off to the atmosphere. Normally, the switch valve 223 is in a closed state, and in the calibration process of the metering pump 15, only the switch valve 223 needs to be opened by a small angle, and the ambient air pressure is transmitted to the secondary metering device 22, so that the fluid can smoothly enter and exit the secondary metering device 22.
In other embodiments, as shown in fig. 4, the top of the secondary scale 22 is fitted with a filter 224, and the filter 224 is directly connected to the atmosphere, allowing free passage of atmospheric air into and out of the secondary scale 22 while blocking the ingress of solid impurities from the atmosphere. The addition of the filter 224 also allows for the avoidance of direct contact between the fluid in the secondary dispenser 22 and the atmosphere, ensuring that the gas entering the secondary dispenser is a purge gas.
In still other embodiments, as shown in FIG. 5, the top of the secondary scale 22 is a transparent enclosure, and the side near the top of the secondary scale 22 is provided with a vent hole, which is equipped with a spiral tube 225, and the other end of the spiral tube 225 faces downward. The spiral tube 225 in this embodiment may trap atmospheric contaminants within the spiral tube from entering the secondary scale, thereby creating a relatively clean environment for the secondary scale.
In some preferred embodiments, as shown in fig. 1, the metering device further comprises a blow valve 27, the blow valve 27 being disposed at the lowermost position of the metering device; a hose 28 is connected to the vent valve 27, and the other end of the hose 28 is connected to the fluid source 11, so that in the event of an accident, the fluid remaining in the metering device will flow back to the fluid source 11 through the vent valve 27 and the hose 28. The central purpose of the design of the air release valve 27 is to exhaust the residual fluid in the metering device, so as to prevent the residual fluid from deteriorating in the metering device for too long a time and polluting the fluid for the next calibration.
A fluid supply system as shown in figure 1 comprising any of the metering devices described above. The fluid supply system can calibrate the supply amount of the metering pump 15 in the system in unit time at any time according to requirements, has comprehensive function configuration of the whole system and stable working state, and is convenient for operators to master whether the actual flow rate of the fluid supplied by the system is consistent with the theoretical flow rate or not in real time.
The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (10)
1. A metering device for a fluid supply system, said fluid supply system comprising a source of fluid, an inlet conduit, a first inlet control valve, a second inlet control valve, a metering pump, an outlet conduit, an outlet control valve; the metering device with the inlet pipeline connect in parallel in fluid supply system, the metering device both ends are the access mouth respectively and connect the export, the access mouth with the inlet pipeline connect in first import control valve with between the second import control valve, connect the export with the inlet pipeline connect in between second import control valve and the measuring pump, its characterized in that, metering device includes:
the primary meter is provided with scales or capacity marks and is divided into a metering container with an inlet end and an outlet end, and the inlet end is connected with the inlet pipeline and receives and accommodates the fluid with the preset volume;
the secondary meter is provided with scales or capacity marks and is divided into a metering container with an inlet end and an outlet end, and the inlet end and the outlet end of the secondary meter are respectively connected with the outlet end of the primary meter and the metering pump and receive and contain the fluid with preset volume;
a connecting line for connecting the meter and an inlet line of the fluid supply system;
the first control valve is arranged on a connecting pipeline between the first inlet control valve and the primary meter and is used for controlling whether the fluid enters the primary meter or not;
the second control valve is arranged on a connecting pipeline between the primary meter and the secondary meter and is used for controlling whether the fluid in the primary meter enters the secondary meter or not;
and the third control valve is arranged on a connecting pipeline between the secondary metering device and the metering pump and is used for controlling whether the fluid in the secondary metering device enters the metering pump or not.
2. The metering device for a fluid supply system according to claim 1, wherein the primary metering member is a transparent tube, the inner chamber comprises a piston body, the top end of the piston body is provided with a filter, the inner chamber of the primary metering member is divided into a lower liquid chamber and an upper gas chamber by the piston body, and the piston body can only move between an upper stop position and a lower stop position, the upper stop position and the lower stop position are respectively arranged on the inner wall of the primary metering member and are protrusions along the circumferential direction, and the piston body represents the maximum volume and the minimum volume of the fluid in the primary metering member when the piston body is at the upper stop position and the lower stop position respectively; the filter is directly communicated with the atmosphere, so that the solid impurities in the atmosphere can be prevented from entering while the atmosphere is allowed to freely enter and exit the gas cavity of the primary meter.
3. The metering device for a fluid supply system according to claim 2, wherein the primary meter liquid chamber maximum volume is the same as the secondary meter maximum volume.
4. The metering device of claim 2, wherein the primary metering device has a maximum liquid chamber volume that is an integer multiple of the maximum secondary metering device volume, the multiple corresponding to the number of repetitions of the secondary metering device supplying the metering pump with the fluid during calibration, such that when the metering pump is calibrated, the primary metering device is filled with the fluid for the entire calibration.
5. The metering device of claim 2, wherein the secondary meter is a transparent tube mounted in a vertical orientation.
6. The metering device for a fluid supply system according to claim 5, wherein an on-off valve is provided at a top end of the secondary meter, and the secondary meter is connected to or disconnected from the atmosphere through the on-off valve.
7. The metering device for a fluid supply system according to claim 5, wherein the top of the secondary metering device is provided with a filter, the filter is directly communicated with the atmosphere, and the filter can block solid impurities in the atmosphere while allowing the atmosphere to freely enter and exit the secondary metering device.
8. The metering device for a fluid supply system according to claim 5, wherein the top of the secondary metering device is in a transparent closed form, and a vent hole is formed in the side surface close to the top end of the secondary metering device, the vent hole is provided with a spiral pipe, and the other end of the spiral pipe faces downwards.
9. The metering device for a fluid supply system according to any one of claims 1 to 8, wherein the metering device further comprises a blow valve disposed at a lowest position of the metering device; the emptying valve is connected with a hose, the other end of the hose is communicated with the fluid source, and when an accident happens, the fluid remained in the metering device flows back to the fluid source through the emptying valve and the hose.
10. A fluid supply system comprising a metering device according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922139534.3U CN211783706U (en) | 2019-12-03 | 2019-12-03 | Metering device for fluid supply system and fluid supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922139534.3U CN211783706U (en) | 2019-12-03 | 2019-12-03 | Metering device for fluid supply system and fluid supply system |
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| CN211783706U true CN211783706U (en) | 2020-10-27 |
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| CN201922139534.3U Active CN211783706U (en) | 2019-12-03 | 2019-12-03 | Metering device for fluid supply system and fluid supply system |
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