CN114183336A - Skid-mounted unit of metering pump for continuous production - Google Patents
Skid-mounted unit of metering pump for continuous production Download PDFInfo
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- CN114183336A CN114183336A CN202111526417.8A CN202111526417A CN114183336A CN 114183336 A CN114183336 A CN 114183336A CN 202111526417 A CN202111526417 A CN 202111526417A CN 114183336 A CN114183336 A CN 114183336A
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- 238000010924 continuous production Methods 0.000 title claims abstract description 33
- 238000004140 cleaning Methods 0.000 claims abstract description 100
- 239000000463 material Substances 0.000 claims description 141
- 238000007599 discharging Methods 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 23
- 239000007921 spray Substances 0.000 claims description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 15
- 238000010926 purge Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000005457 optimization Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 16
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
According to the skid-mounted structure of the metering pump, through the matching of the valves and the pipelines, the dead-angle-free cleaning of the pipelines is realized, and the problems of blockage, cross pollution and the like are effectively avoided; and the whole volume is reduced through the space three-dimensional optimization design. The skid-mounted metering pump provided by the invention is simple in skid-mounted structure and has higher application value in the field of continuous production.
Description
Technical Field
The invention relates to the field of continuous production, in particular to a skid-mounted unit of a metering pump for continuous production.
Background
The continuous production is carried out in a mode of conveying one or more materials to a tubular reactor, a microchannel reactor or a cavity type reactor through a metering pump at a constant and stable flow rate, and the device has the advantages of accurate temperature control, good mixing effect, small reaction amount, continuous reaction, easiness in amplification and the like, so that the device is widely applied to the field of chemical production with active chemical properties and violent reaction, has higher requirement on precision transportation of the metering pump, and is one of core technologies and technical difficulties of continuous production.
A metering pump skid-mounted unit in the prior art is large in size, large in flow fluctuation, large in flow pulse and large in dead angle, and is not easy to clean. The most serious problem is that the dead angle is too much to be cleaned easily, because the metering pump skid-mounted unit can be used for different material systems, if the cleaning is not clean during each switching, cross contamination can occur among reaction systems, the requirement of a GMP system for drug production is seriously violated, and the cleaning is not clean, so that the blockage of a continuous production pipeline can be caused, therefore, how to clean the metering pump skid-mounted unit is realized, especially, the dead angle is cleaned, and the technical problem which needs to be solved in the field is solved.
Disclosure of Invention
The invention aims to provide a skid-mounted unit of a metering pump for continuous production, which can clean the skid-mounted unit of the metering pump, particularly clean dead corners.
In order to solve the technical problem, the skid-mounted unit of the metering pump for continuous production provided by the invention comprises a feeding unit, a pump body unit and a discharging unit:
the feeding unit comprises a feeding unit material inlet, a first feeding pipeline, a second feeding pipeline, a main feeding pipeline and a feeding unit material outlet, and the first feeding pipeline and the second feeding pipeline are arranged in parallel and do not work simultaneously; the first feeding pipeline is provided with a first cleaning inlet and a first cleaning outlet; the second feeding pipeline is provided with a second cleaning inlet and a second cleaning outlet; the first feed line is provided with a first filter which is positioned between the first cleaning inlet and the first cleaning outlet; the second feed line is provided with a second filter which is positioned between the second cleaning inlet and the second cleaning outlet;
the pump body unit comprises a pump body unit material inlet, a material conveying pipeline and a pump body unit material outlet; the material conveying pipeline is provided with a metering pump head and a damper, and the damper is arranged at the downstream position of the metering pump head; an overpressure protection pipeline and an internal circulation cleaning pipeline which are connected in parallel are formed between the damper and the material inlet of the pump body unit;
the discharging unit comprises a discharging unit material inlet, a main discharging pipeline and a discharging unit material outlet; the main discharging pipeline is sequentially provided with a mass meter, a pressure sensor and a back pressure valve from the upstream direction to the downstream direction; and a pressure detection pipeline is formed between the pressure sensor and the main discharging pipeline, and is provided with a third cleaning outlet.
Preferably, the material inlet of the feeding unit is communicated with the material inlet of the first feeding pipeline and the material inlet of the second feeding pipeline through a first three-way valve; the material outlet of the first feeding pipeline and the material outlet of the second feeding pipeline are communicated with the main feeding pipeline through a second three-way valve;
the first three-way valve and the second three-way valve are matched to switch the material flow through the first feeding pipeline or the second feeding pipeline.
Preferably, the main feeding pipeline is provided with a first pressure gauge for monitoring the pressure between the feeding tank and the pump head of the metering pump.
Preferably, the main feeding pipeline is provided with a first sprinkling pipeline, and the first sprinkling pipeline is arranged at the downstream position of the pressure gauge.
Preferably, the first cleaning inlet is provided with a first two-way valve; the first cleaning outlet is provided with a second two-way valve;
the second cleaning inlet is provided with a third two-way valve; a fourth two-way valve is arranged at the second cleaning outlet;
a fifth two-way valve is arranged at the outlet of the first spray guiding pipeline;
a first check valve is arranged between the first pressure gauge and the first spray guide pipe;
in the continuous production process, the first two-way valve, the second two-way valve, the third two-way valve, the fourth two-way valve and the fifth two-way valve are all in a closed state.
Preferably, an exhaust pipeline is arranged between the damper and the material outlet of the pump body unit.
Preferably, the material conveying pipeline is provided with a sixth two-way valve and a seventh two-way valve, the sixth two-way valve is arranged at the upstream position of the pump head of the metering pump, and the seventh two-way valve is arranged between the damper and the material outlet of the pump body unit and is positioned at the upstream position of the exhaust pipeline;
an eighth two-way valve is installed at the outlet of the exhaust pipeline;
the internal circulation cleaning pipeline is provided with a ninth two-way valve;
the overpressure protection pipeline is provided with a safety valve;
in the continuous production process, the sixth two-way valve and the seventh two-way valve are both in an on state, and the eighth two-way valve and the ninth two-way valve are in an off state;
in the continuous production process, when gas exists at the material inlet of the pump body unit and the pump head of the metering pump is difficult to suck materials, the eighth two-way valve is opened to exhaust the gas;
in the continuous production process, when the working pressure of the pump head of the metering pump is overloaded, the safety valve is automatically opened, and the overpressure protection pipeline is communicated with the material conveying pipeline to realize the internal circulation of the material in the pump body unit so as to relieve the pressure of the pump head of the metering pump;
in the cleaning process, the sixth two-way valve is in an on state, the seventh two-way valve is closed, the ninth two-way valve is opened, and the internal circulation cleaning pipeline is communicated with the material conveying pipeline to realize the internal circulation cleaning of the pump head of the metering pump.
Preferably, the main discharging pipeline is provided with a second pressure gauge for monitoring the pressure change in the reactor, and the second pressure gauge is arranged between the back pressure valve and the material outlet of the discharging unit.
Preferably, the main discharging pipeline is provided with a second sprinkling pipeline and a third sprinkling pipeline;
the second spray guide pipeline is arranged between the mass meter and the pressure detection pipeline;
and the third spray guide pipeline is arranged between the second pressure meter and the material outlet of the discharging unit.
Preferably, the main discharging pipeline is provided with a twelfth through valve and an eleventh through valve, the twelfth through valve is arranged between the second sprinkling pipeline and the pressure sensor, and the eleventh through valve is arranged at the position of the material outlet of the discharging unit;
a twelfth two-way valve is arranged at the outlet of the second spray guiding pipeline;
a thirteenth two-way valve is arranged at the outlet of the third spray guide pipeline;
the pressure detection pipeline is provided with a fourteenth two-way valve;
a fifteenth two-way valve is arranged at the position of the third cleaning outlet;
a second one-way valve is arranged at the upstream position of the back pressure valve;
in the continuous production process, the twelfth, eleventh and fourteenth two-way valves are all in an on state, and the twelfth, thirteenth and fifteenth two-way valves are all in an off state;
in the cleaning process, the twelfth two-way valve and the fourteenth two-way valve are in an on state, the twelfth two-way valve and the thirteenth two-way valve are in an off state, the eleventh two-way valve is closed, and the fifteenth two-way valve is opened to clean the pressure sensor.
According to the skid-mounted structure of the metering pump, through the matching of the valves and the pipelines, the dead-angle-free cleaning of the pipelines is realized, and the problems of blockage, cross pollution and the like are effectively avoided; and the whole volume is reduced through the space three-dimensional optimization design. The skid-mounted metering pump provided by the invention is simple in skid-mounted structure and has higher application value in the field of continuous production.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of a skid-mounted structure of a metering pump of the present invention;
FIG. 2 is a schematic view of a pipeline structure of a feeding unit of an embodiment of a skid-mounted structure of a metering pump of the present invention;
FIG. 3 is a schematic view of the valve position of the feed unit tube of an embodiment of the skid-mounted configuration of the metering pump of the present invention;
FIG. 4 is a schematic diagram of a pump body unit structure of an embodiment of a skid-mounted structure of the metering pump of the present invention;
FIG. 5 is a schematic view of the valve positions of the pump block unit of an embodiment of the skid-mounted configuration of the metering pump of the present invention;
FIG. 6 is a schematic structural diagram of a discharging unit of an embodiment of a skid-mounted structure of a metering pump of the present invention;
FIG. 7 is a schematic view of the valve position of the discharge unit of an embodiment of the skid-mounted metering pump structure of the present invention;
in the figure, 1-feed unit; 2-a pump body unit; 3-a discharge unit; 11-a feed unit material inlet; 12-a first feed line; 13-a second feed line; 14-a main feed line; 15-a feed unit material outlet; 16-a first pressure gauge; 17-a first one-way valve; 21-pump body unit material inlet; 22-material conveying pipeline; 23-pump unit material outlet; 24-a metering pump head; 25-a damper; 26-an overpressure protection circuit; 27-internal circulation cleaning pipeline; 31-a discharge unit material inlet; 32-main discharge line; 33-discharge unit material outlet; 34-a mass meter; 35-a pressure sensor; 36-backpressure valve; 37-a pressure detection line; 38-a second pressure gauge; 39-a second one-way valve; 121 — first purge inlet; 122 — first purge outlet; 123-a first filter; 131-a second purge inlet; 132-a second purge outlet; 133-a second filter; 141-a first three-way valve; 142-a second three-way valve; 143-a first drain line; 221-an exhaust line; 222-a sixth two-way valve; 223-a seventh two-way valve; 261-safety valve; 271-a ninth two-way valve; 321-a second drain line; 322-third lead drenching pipeline; 323-twelfth way valve; 324-an eleventh two-way valve; 371 — a third purge outlet; 372-a fourteenth two way valve; 1211 — a first two-way valve; 1221-a second two-way valve; 1311-a third two-way valve; 1321-a fourth two-way valve; 1431-a fifth two-way valve; 2211-eighth two-way valve; 3211-twelfth two-way valve; 3221-a thirteenth two-way valve; 3711-fifteenth two-way valve.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 7, there is shown a metering pump skid for continuous production according to the present invention, comprising a feed unit, a pump body unit and a discharge unit:
the feeding unit comprises a feeding unit material inlet, a first feeding pipeline, a second feeding pipeline, a main feeding pipeline and a feeding unit material outlet, and the first feeding pipeline and the second feeding pipeline are arranged in parallel and do not work simultaneously; the first feeding pipeline is provided with a first cleaning inlet and a first cleaning outlet; the second feeding pipeline is provided with a second cleaning inlet and a second cleaning outlet; the first feed line is provided with a first filter which is positioned between the first cleaning inlet and the first cleaning outlet; the second feed line is provided with a second filter which is positioned between the second cleaning inlet and the second cleaning outlet;
the pump body unit comprises a pump body unit material inlet, a material conveying pipeline and a pump body unit material outlet; the material conveying pipeline is provided with a metering pump head and a damper, and the damper is arranged at the downstream position of the metering pump head; an overpressure protection pipeline and an internal circulation cleaning pipeline which are connected in parallel are formed between the damper and the material inlet of the pump body unit;
the discharging unit comprises a discharging unit material inlet, a main discharging pipeline and a discharging unit material outlet; the main discharging pipeline is sequentially provided with a mass meter, a pressure sensor and a back pressure valve from the upstream direction to the downstream direction; and a pressure detection pipeline is formed between the pressure sensor and the main discharging pipeline, and is provided with a third cleaning outlet.
In the embodiment of the invention, as for the feeding unit, the arrangement of the first filter and the second filter can filter out residual solids or impurities in reaction materials in the feeding tank, so that the blockage of the feeding unit to a metering pump skid-mounted unit can be effectively avoided, and the influence of the feeding unit on subsequent reaction can be effectively avoided; understandably, by arranging the first feeding pipeline and the second feeding pipeline, when the first feeding pipeline is blocked or the first filter needs to be replaced, materials can be transported through the second feeding pipeline, so that the continuity of continuous production is ensured; the first feeding pipeline and the second feeding pipeline are respectively provided with a path for independent cleaning, so that the first feeding pipeline or the second feeding pipeline can be cleaned independently, continuous production is not influenced by cleaning, for example, the first feeding pipeline can be used for cleaning the second feeding pipeline in the continuous production process, and the third two-way valve and the fourth two-way valve are opened simultaneously during cleaning, so that cleaning liquid enters the second feeding pipeline from the third two-way valve and then flows out of the second feeding pipeline from the fourth two-way valve to clean the second feeding pipeline.
In the embodiment of the invention, as for the pump body unit, the damper mainly buffers the materials pumped out by the pump head of the metering pump so as to relieve the pulse caused by the reciprocating of the pump head of the metering pump, thereby ensuring the stable supply of the materials in the continuous production process; the arrangement of the overpressure protection pipeline is a protection for the pump head of the metering pump, when the pump head of the metering pump works in overpressure, the overpressure protection pipeline is started, and the overpressure protection pipeline is communicated with the material conveying pipeline, so that internal circulation of partial materials in the pump body unit is realized, the working pressure of the pump head of the metering pump is reduced, and the possible damage of high pressure to the pump head of the metering pump is avoided; when the pump body unit needs to be cleaned, the internal circulation cleaning pipeline is started.
In the embodiment of the invention, for the discharging unit, the mass meter, the pressure sensor and the metering pump head of the pump body unit work cooperatively to jointly maintain quantitative and stable supply of materials to the reactor in the continuous production process; the backpressure valve is used for outputting the materials with constant resistance, so that the influence on the conveying of the materials due to the change of the internal pressure of the reactor is avoided; the pressure detection pipeline between the pressure sensor of the discharge unit and the main discharge pipeline is a cleaning dead angle, the pressure detection pipeline is provided with a third cleaning outlet, and in the cleaning process, cleaning liquid can flow out from the third cleaning outlet so as to complete the cleaning of the dead angle in the prior art, namely the pressure detection pipeline.
In a specific embodiment, the feed unit material inlet is communicated with the material inlet of the first feed line and the material inlet of the second feed line through a first three-way valve; the material outlet of the first feeding pipeline and the material outlet of the second feeding pipeline are communicated with the main feeding pipeline through a second three-way valve; the first three-way valve and the second three-way valve are matched to switch the material flow through the first feeding pipeline or the second feeding pipeline. Preferably, the main feed line is provided with a first pressure gauge for monitoring the pressure between the feed tank and the pump head of the metering pump. More preferably, the main feeding pipeline is provided with a first sprinkling pipeline, and the first sprinkling pipeline is arranged at the downstream position of the pressure gauge. Wherein the first cleaning inlet is provided with a first two-way valve; the first cleaning outlet is provided with a second two-way valve; the second cleaning inlet is provided with a third two-way valve; a fourth two-way valve is arranged at the second cleaning outlet; a fifth two-way valve is arranged at the outlet of the first spray guiding pipeline; and a first one-way valve is arranged between the first pressure gauge and the first guide shower pipe.
In the above specific embodiment, in the continuous production process, the first two-way valve, the second two-way valve, the third two-way valve, the fourth two-way valve and the fifth two-way valve are all in the closed state, and the material enters from the material inlet of the material unit, flows through the first feeding pipeline or the second feeding pipeline, flows to the main feeding pipeline, and finally flows out through the material outlet of the material unit, and flows into the material inlet of the pump body unit.
In the above embodiment, when the feeding unit is cleaned integrally, the first to fourth two-way valves are all in the closed state, the fifth two-way valve is opened first to discharge the residual material, and then the fifth two-way valve is closed, so that the cleaning liquid enters from the material inlet of the feeding unit, and the flow path and the material flow path in the continuous production process flow through the material outlet of the feeding unit and finally flow out of the material outlet of the feeding unit and flow into the material inlet of the pump unit. When the first feeding pipeline needs to be cleaned independently, the first three-way valve and the second three-way valve are operated, the material is switched to the second feeding pipeline, then the first two-way valve and the second two-way valve are opened, cleaning liquid enters from the first cleaning inlet, flows through the whole first feeding pipeline and flows out from the first cleaning outlet, the cleaning of the first feeding pipeline is completed, and similarly, the cleaning of the second feeding pipeline is completed; through the cooperation of each valve and pipeline, realize the washing at no dead angle of feeding unit.
In the above embodiment, the first pressure gauge monitors the pressure in front of the metering pump head to ensure that the metering pump head can continuously and normally work, and also monitors the supply of the material, and when the material supply is abnormal, the adjustment is made in time; the first one-way valve effectively prevents the backflow of materials or cleaning fluid, and plays a good role in protecting the feeding unit; the first guide sprinkling pipeline is used for discharging materials or cleaning liquid in the feeding unit, and is generally used when the materials are replaced or the feeding unit is integrally cleaned, for example, the materials remained in the feeding unit are discharged when the materials are replaced, and the cleaning liquid is discharged after the cleaning is finished.
In the above embodiment, the feeding unit is arranged three-dimensionally, preferably vertically, as shown in fig. 2; the feeding unit material inlet is located at the top of the vertical direction of the feeding unit, the feeding unit material outlet is located at the bottom of the vertical direction, and the first guide sprinkling pipeline is arranged at the lowest position of the vertical direction of the feeding unit, so that the material or the cleaning liquid can flow out conveniently. The three-dimensional setting saves the assembly space and is beneficial to the miniaturization design of the skid-mounted unit of the metering pump.
In a specific embodiment, an exhaust pipeline is arranged between the damper and the material outlet of the pump body unit. The material conveying pipeline is provided with a sixth two-way valve and a seventh two-way valve, the sixth two-way valve is arranged at the upstream position of the pump head of the metering pump, and the seventh two-way valve is arranged between the damper and the material outlet of the pump body unit and is positioned at the upstream position of the exhaust pipeline; an eighth two-way valve is installed at the outlet of the exhaust pipeline; the internal circulation cleaning pipeline is provided with a ninth two-way valve; the overpressure protection pipeline is provided with a safety valve.
In the above specific embodiment, in the continuous production process, the sixth two-way valve and the seventh two-way valve are both in the on state, and the eighth two-way valve and the ninth two-way valve are in the off state; the material flows in from the material inlet of the pump body unit, and under the action of the pump head of the metering pump, the material flows out from the material outlet of the pump body unit and flows into the material inlet of the discharging unit (the actual material flow is the result of the action of the pump head of the metering pump); when gas exists at the material inlet of the pump body unit and causes difficulty in material suction of the pump head of the metering pump, opening the eighth two-way valve for gas exhaust; when the working pressure of the pump head of the metering pump is overloaded, the safety valve is automatically opened, the overpressure protection pipeline is communicated with the material conveying pipeline to realize the internal circulation of the material in the pump body unit so as to relieve the pressure of the pump head of the metering pump, at the moment, part of the material flows in the pump body unit in a circulation mode, and part of the material continuously flows into the discharging unit from the pump body unit.
In the above specific embodiment, when only the pump body unit needs to be cleaned, the sixth two-way valve is in an on state, the seventh two-way valve is closed, the ninth two-way valve is opened, and the internal circulation cleaning pipeline is communicated with the material conveying pipeline; the cleaning liquid flows in from the upstream feeding unit, and flows to the internal circulation pipeline from the material conveying pipeline under the action of the pump head of the metering pump, and the cleaning liquid is only cleaned in the internal circulation of the pump body unit due to the fact that the upstream feeding unit is provided with the first one-way valve; in addition, after the seventh two-way valve is opened, the cleaning liquid can flow to a downstream discharging unit; through the cooperation of each valve and pipeline, realize the washing that does not have the dead angle to pump body unit.
In the above embodiment, the pump body unit may be arranged in a three-dimensional manner, preferably in a vertical direction, as shown in fig. 4; the pump body unit material inlet is positioned at the bottom of the pump body unit in the vertical direction, the pump body unit material outlet is positioned at the top of the pump body unit in the vertical direction, and the damper is arranged at the top of the pump body unit in the vertical direction; the three-dimensional design of the pump body unit saves the assembly space, and is favorable for the miniaturization design of a skid-mounted unit of the metering pump; in addition, pump body unit material entry and feed unit material export intercommunication, this kind of three-dimensional setting still has following beneficial effect: when the materials are switched or the cleaning is finished, the residual materials or cleaning liquid in the pump body unit are discharged from the first guide sprinkling pipeline, so that the pump body unit is free from material or cleaning liquid residue, and the cleaning is more thorough.
In a specific embodiment, the main discharge pipeline is provided with a second pressure gauge for monitoring the pressure change in the reactor, and the second pressure gauge is arranged between the back pressure valve and the material outlet of the discharge unit; preferably, the main discharging pipeline is provided with a second sprinkling pipeline and a third sprinkling pipeline; the second spray guide pipeline is arranged between the mass meter and the pressure detection pipeline; and the third spray guide pipeline is arranged between the second pressure meter and the material outlet of the discharging unit. The main discharging pipeline is provided with a twelfth through valve and an eleventh through valve, the twelfth through valve is arranged between the second spray guiding pipeline and the pressure sensor, and the eleventh through valve is arranged at the position of a material outlet of the discharging unit; a twelfth two-way valve is arranged at the outlet of the second spray guiding pipeline; a thirteenth two-way valve is arranged at the outlet of the third spray guide pipeline; the pressure detection pipeline is provided with a fourteenth two-way valve; a fifteenth two-way valve is arranged at the position of the third cleaning outlet; and a second check valve is arranged at the upstream position of the back pressure valve.
In the above specific embodiment, in the continuous production process, the twelfth through valve, the eleventh through valve and the fourteenth through valve are all in an on state, the twelfth through valve, the thirteenth through valve and the fifteenth through valve are all in an off state, the material flows in from the upstream pump body unit through the material inlet of the discharging unit, flows through the mass meter and the back pressure valve in sequence, flows out from the material outlet of the discharging unit, and finally enters the reaction tank.
In the above specific embodiment, in the cleaning process, the twelfth way valve and the fourteenth way valve are in the on state, and the twelfth way valve and the thirteenth way valve are in the off state; cleaning liquid flows in from the upstream pump body unit, and the flow path of the cleaning liquid is the same as that of the material; in addition, when the eleventh two-way valve is closed and the fifteenth two-way valve is opened simultaneously, the cleaning liquid flows through the pressure detection pipeline and flows out from the third cleaning outlet so as to complete the cleaning of the pressure detection pipeline; the cleaning without dead angles of the discharging unit is realized through the matching of each valve and each pipeline.
In the above embodiment, the second check valve is used to prevent the material in the reaction tank from flowing back to the upstream functional unit; and a second sprinkling guide pipeline and a third sprinkling guide pipeline are respectively arranged at the upstream position and the downstream position of the second one-way valve, so that the material residue or the cleaning liquid residue at each section can be fully discharged.
In conclusion, the skid-mounted structure for the metering pump provided by the invention realizes no-dead-angle cleaning of each pipeline through the matching of each valve and each pipeline, and effectively avoids the problems of blockage, cross pollution and the like; and the whole volume is reduced through the space three-dimensional optimization design. The skid-mounted metering pump provided by the invention is simple in skid-mounted structure and has higher application value in the field of continuous production.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a continuous production is with measuring pump sled dress unit, includes feeding unit, pump body unit and ejection of compact unit, its characterized in that:
the feeding unit comprises a feeding unit material inlet, a first feeding pipeline, a second feeding pipeline, a main feeding pipeline and a feeding unit material outlet, and the first feeding pipeline and the second feeding pipeline are arranged in parallel and do not work simultaneously; the first feeding pipeline is provided with a first cleaning inlet and a first cleaning outlet; the second feeding pipeline is provided with a second cleaning inlet and a second cleaning outlet; the first feed line is provided with a first filter which is positioned between the first cleaning inlet and the first cleaning outlet; the second feed line is provided with a second filter which is positioned between the second cleaning inlet and the second cleaning outlet;
the pump body unit comprises a pump body unit material inlet, a material conveying pipeline and a pump body unit material outlet; the material conveying pipeline is provided with a metering pump head and a damper, and the damper is arranged at the downstream position of the metering pump head; an overpressure protection pipeline and an internal circulation cleaning pipeline which are connected in parallel are formed between the damper and the material inlet of the pump body unit;
the discharging unit comprises a discharging unit material inlet, a main discharging pipeline and a discharging unit material outlet; the main discharging pipeline is sequentially provided with a mass meter, a pressure sensor and a back pressure valve from the upstream direction to the downstream direction; and a pressure detection pipeline is formed between the pressure sensor and the main discharging pipeline, and is provided with a third cleaning outlet.
2. The metering pump skid unit of claim 1, wherein the feed unit material inlet communicates with the material inlet of the first feed line and the material inlet of the second feed line through a first three-way valve; the material outlet of the first feeding pipeline and the material outlet of the second feeding pipeline are communicated with the main feeding pipeline through a second three-way valve;
the first three-way valve and the second three-way valve are matched to switch the material flow through the first feeding pipeline or the second feeding pipeline.
3. The metering pump skid of claim 2, wherein the main feed line is fitted with a first pressure gauge to monitor the pressure between the feed tank to the metering pump head.
4. The metering pump skid-mounted unit of claim 3, wherein the main feed line is provided with a first drain line disposed at a location downstream of the pressure gauge.
5. The metering pump skid unit of claim 4, wherein the first purge inlet is fitted with a first two-way valve; the first cleaning outlet is provided with a second two-way valve;
the second cleaning inlet is provided with a third two-way valve; a fourth two-way valve is arranged at the second cleaning outlet;
a fifth two-way valve is arranged at the outlet of the first spray guiding pipeline;
a first check valve is arranged between the first pressure gauge and the first spray guide pipe;
in the continuous production process, the first two-way valve, the second two-way valve, the third two-way valve, the fourth two-way valve and the fifth two-way valve are all in a closed state.
6. Metering pump skid unit as claimed in claim 1, characterized in that an exhaust line is provided between the damper and the material outlet of the pump block unit.
7. The metering pump skid unit of claim 6, wherein the material delivery line is fitted with a sixth two-way valve and a seventh two-way valve, the sixth two-way valve being fitted at a location upstream of the metering pump head, the seventh two-way valve being fitted between the damper and the pump block unit material outlet at a location upstream of the exhaust line;
an eighth two-way valve is installed at the outlet of the exhaust pipeline;
the internal circulation cleaning pipeline is provided with a ninth two-way valve;
the overpressure protection pipeline is provided with a safety valve;
in the continuous production process, the sixth two-way valve and the seventh two-way valve are both in an on state, and the eighth two-way valve and the ninth two-way valve are in an off state;
in the continuous production process, when gas exists at the material inlet of the pump body unit and the pump head of the metering pump is difficult to suck materials, the eighth two-way valve is opened to exhaust the gas;
in the continuous production process, when the working pressure of the pump head of the metering pump is overloaded, the safety valve is automatically opened, and the overpressure protection pipeline is communicated with the material conveying pipeline to realize the internal circulation of the material in the pump body unit so as to relieve the pressure of the pump head of the metering pump;
in the cleaning process, the sixth two-way valve is in an on state, the seventh two-way valve is closed, the ninth two-way valve is opened, and the internal circulation cleaning pipeline is communicated with the material conveying pipeline to realize the internal circulation cleaning of the pump head of the metering pump.
8. The metering pump skid unit of claim 1, wherein the main discharge line is fitted with a second pressure gauge for monitoring changes in pressure within the reactor, the second pressure gauge being fitted between the back pressure valve and the discharge unit material outlet.
9. The metering pump skid-mounted unit as set forth in claim 8, wherein the main discharge line is provided with a second drench guiding line and a third drench guiding line;
the second spray guide pipeline is arranged between the mass meter and the pressure detection pipeline;
and the third spray guide pipeline is arranged between the second pressure meter and the material outlet of the discharging unit.
10. The metering pump skid-mounted unit as set forth in claim 9, wherein the main discharging pipeline is provided with a twelfth through valve and an eleventh through valve, the twelfth through valve is arranged between the second sprinkling guide pipeline and the pressure sensor, and the eleventh through valve is arranged at a material outlet position of the discharging unit;
a twelfth two-way valve is arranged at the outlet of the second spray guiding pipeline;
a thirteenth two-way valve is arranged at the outlet of the third spray guide pipeline;
the pressure detection pipeline is provided with a fourteenth two-way valve;
a fifteenth two-way valve is arranged at the position of the third cleaning outlet;
a second one-way valve is arranged at the upstream position of the back pressure valve;
in the continuous production process, the twelfth, eleventh and fourteenth two-way valves are all in an on state, and the twelfth, thirteenth and fifteenth two-way valves are all in an off state;
in the cleaning process, the twelfth two-way valve and the fourteenth two-way valve are in an on state, the twelfth two-way valve and the thirteenth two-way valve are in an off state, the eleventh two-way valve is closed, and the fifteenth two-way valve is opened to clean the pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111526417.8A CN114183336A (en) | 2021-12-14 | 2021-12-14 | Skid-mounted unit of metering pump for continuous production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111526417.8A CN114183336A (en) | 2021-12-14 | 2021-12-14 | Skid-mounted unit of metering pump for continuous production |
Publications (1)
| Publication Number | Publication Date |
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| CN114183336A true CN114183336A (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111526417.8A Pending CN114183336A (en) | 2021-12-14 | 2021-12-14 | Skid-mounted unit of metering pump for continuous production |
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