CN117145737A - Hydraulic diaphragm type metering pump, intelligent skid-mounted injection device and flow adjusting method thereof - Google Patents
Hydraulic diaphragm type metering pump, intelligent skid-mounted injection device and flow adjusting method thereof Download PDFInfo
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- CN117145737A CN117145737A CN202311096109.5A CN202311096109A CN117145737A CN 117145737 A CN117145737 A CN 117145737A CN 202311096109 A CN202311096109 A CN 202311096109A CN 117145737 A CN117145737 A CN 117145737A
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- 238000000034 method Methods 0.000 title claims description 24
- 238000002347 injection Methods 0.000 title claims description 11
- 239000007924 injection Substances 0.000 title claims description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 37
- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 230000009471 action Effects 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 39
- 239000010720 hydraulic oil Substances 0.000 claims description 29
- 238000009434 installation Methods 0.000 claims description 13
- 230000033228 biological regulation Effects 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 230000035485 pulse pressure Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 6
- 230000001502 supplementing effect Effects 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
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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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
- F04B43/0733—Pumps having fluid drive the actuating fluid being controlled by at least one valve with fluid-actuated pump inlet or outlet valves; with two or more pumping chambers in series
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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
- 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
- F04B53/10—Valves; Arrangement of valves
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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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
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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
- F04B53/20—Filtering
-
- 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
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Abstract
A hydraulic diaphragm metering pump, comprising: the cylinder body is sequentially provided with a driving assembly, a plunger, a flow regulating assembly and a safety valve; the motor shaft is connected with a worm shaft of the driving assembly, the worm shaft drives the turbine to do rotary motion, and an eccentric wheel integrally arranged with the turbine converts the rotary motion into reciprocating motion through a connecting rod; the plunger is connected with one end of the connecting rod, which is different from the eccentric wheel, and reciprocates under the action of the connecting rod; the flow regulating assembly moves the flow control rod under the action of the regulating end so as to control the opening and closing degree of the bypass hole; the safety valve can enable the released pressure oil to be transmitted back to the oil tank through the internal oil circuit under the overpressure state; the pump head is arranged on the cylinder body and is provided with an inlet check valve and an outlet check valve respectively; and the diaphragm is arranged between the pump head and the cylinder body. The invention has the advantages of simplified structure, stable operation, no leakage, high safety and reliability, little daily maintenance workload and the like, and is worthy of popularization and application in industry.
Description
Technical Field
The invention relates to the technical field of metering pumps, in particular to a hydraulic diaphragm type metering pump, an intelligent skid-mounted injection device and a flow adjusting method thereof.
Background
Metering pumps are a type of fluid delivery machinery that are distinguished by the ability to maintain a constant flow rate independent of discharge pressure. The metering pump can simultaneously complete the functions of conveying, metering and adjusting, thereby simplifying the production process flow. By using a plurality of metering pumps, a plurality of mediums can be input into the process flow according to an accurate proportion for mixing. Due to its own outstanding advantages, metering pumps are now widely used in various industrial fields of petrochemical industry, pharmaceutical industry, food industry and the like. The metering pump generally comprises a worm and gear driving mechanism, an eccentric rotation mechanism, a plunger reciprocating mechanism and a diaphragm pump head mechanism, wherein the worm and gear driving mechanism drives the eccentric rotation mechanism, an eccentric wheel of the eccentric rotation mechanism drives a plunger in the plunger reciprocating mechanism to reciprocate, the plunger drives a diaphragm of the diaphragm pump head mechanism to deform, and the deformation of the diaphragm can change the volume of a pump cavity, so that the purpose of conveying media is achieved.
However, conventional plunger diaphragm metering pumps suffer from the following significant drawbacks: the first plunger and the pump body are sealed by the filler, the filler is inevitably worn after a period of use to cause leakage, and the plunger is easy to wear. The second, adjust the adjusting part of eccentric wheel can take place wearing and tearing in long-term use, lead to the eccentric distance of eccentric wheel and the scale inequality on the knob, and then cause the actual flow of measuring pump inconsistent with predetermineeing the flow for production error appears, and the practicality is lower. Thirdly, the diaphragm is easy to deform in the use process, the deformation is larger and larger along with the time, the distance of the front and back movement of the diaphragm and the change of the movement amount are gradually influenced, so that the negative pressure difference required by sucking the medium is influenced, the larger the deformation is, the smaller the pressure difference is, the worse the sucking performance of the medium is, enough negative pressure cannot be provided, the medium cannot be sucked normally, and the medium cannot be conveyed normally.
Therefore, the present designer actively researches and improves the problems existing in the prior art by virtue of years of experience in the industry, and the hydraulic diaphragm type metering pump, the intelligent skid-mounted injection device and the flow regulating method thereof are provided.
Disclosure of Invention
The first purpose of the invention is to provide a hydraulic diaphragm metering pump aiming at the defects that in the prior art, a plurality of stuffing seals are arranged between a plunger and a pump body of a traditional plunger diaphragm metering pump, the stuffing is inevitably worn after a period of use to cause leakage, an adjusting component for adjusting an eccentric wheel is worn in the long-term use process, the eccentric distance of the eccentric wheel is unequal with scales on a knob, the actual flow of the metering pump is inconsistent with the preset flow, and the diaphragm is easy to deform in the use process to influence the negative pressure difference required by a suction medium, the medium cannot be sucked normally, and the like.
The second purpose of the invention is to provide a flow regulating method of a hydraulic diaphragm metering pump, which aims at solving the defects that in the prior art, a plurality of stuffing seals are arranged between a plunger and a pump body of a traditional plunger diaphragm metering pump, the stuffing is inevitably worn after a period of use to cause leakage, an adjusting component for adjusting an eccentric wheel is worn in the long-term use process, so that the eccentric distance of the eccentric wheel is unequal with the scale on a knob, the actual flow of the metering pump is inconsistent with the preset flow, and the diaphragm is easy to deform in the use process to influence the negative pressure difference required by a suction medium, so that the medium cannot be sucked normally.
The invention provides an intelligent skid-mounted injection device with the hydraulic diaphragm metering pump, aiming at the defects that in the prior art, a plurality of stuffing seals are arranged between a plunger and a pump body of a traditional plunger diaphragm metering pump, the stuffing is inevitably worn after a period of use to cause leakage, an adjusting component for adjusting an eccentric wheel is worn in the long-term use process, so that the eccentric distance of the eccentric wheel is unequal to scales on a knob, the actual flow of the metering pump is inconsistent with the preset flow, and the diaphragm is easy to deform in the use process to influence the negative pressure difference required by a suction medium, so that the medium cannot be sucked normally and the like.
To achieve the first object of the present invention, there is provided a hydraulic diaphragm metering pump comprising:
the cylinder body is internally provided with a first installation cavity of the driving assembly, a second installation cavity of the plunger, a third installation cavity of the flow regulating assembly and a fourth installation cavity of the safety valve in sequence;
the motor shaft of the motor is connected with a worm shaft of the driving assembly through a coupler, the worm shaft drives a turbine of the driving assembly to do rotary motion, and an eccentric wheel integrally arranged with the turbine converts the rotary motion into reciprocating motion through a connecting rod and transmits the reciprocating motion to the plunger;
the outer diameter of the plunger is matched with the inner diameter of the cylinder body, and the plunger is connected with one end of the connecting rod different from the eccentric wheel, so that the plunger can reciprocate under the action of the connecting rod;
the flow regulating assembly is arranged in a third mounting cavity of the cylinder body, the regulating end of the flow regulating assembly is arranged at the end part of the third mounting cavity different from the plunger, one end of a flow control rod of the flow regulating assembly is movably arranged in the plunger, the other end of the flow control rod is propped against the regulating end, and the flow control rod moves under the action of the regulating end so as to control the opening and closing degree of a bypass hole radially arranged on the plunger;
the safety valve is arranged in the fourth mounting cavity of the cylinder body and can enable the released pressure oil to be transmitted back to the oil tank through the internal oil circuit under the overpressure state;
the pump head is arranged on the cylinder body, and an inlet check valve and an outlet check valve are respectively arranged on the pump head;
the diaphragm is arranged between the pump head and the cylinder body, a medium cavity is formed between the diaphragm and the pump head, a hydraulic cavity is formed between the diaphragm and the cylinder body, and the medium cavity is communicated with the inlet check valve and the outlet check valve.
Optionally, the plunger is a hollow plunger with unequal diameters.
Optionally, the outer diameter of the end of the plunger connected with the flow control rod is larger than the outer diameter of the end of the plunger connected with the connecting rod.
Optionally, one end of the flow control rod is movably arranged in the plunger, and can control the opening and closing degree of a bypass hole radially arranged on the plunger.
Optionally, a hydraulic oil seal is provided at the piston chamber of the cylinder.
Alternatively, the plunger reciprocates with a fixed stroke, enabling the piston chamber to be in short communication with the tank at the end of each intake stroke and at the beginning of each discharge stroke, and during the short communication period air or steam is exhausted from the hydraulic system and lost hydraulic oil is replenished.
Optionally, when the adjusting end of the flow adjusting assembly is adjusted by a knob, the flow control rod can be moved, so that the bypass hole radially arranged on the plunger can be closed at a preset percentage position of the whole plunger stroke, and the flow adjusting range of the hydraulic diaphragm type metering pump is 0-100%.
To achieve the second object of the present invention, there is provided a flow rate adjustment method of a hydraulic diaphragm type metering pump, the flow rate adjustment method of the hydraulic diaphragm type metering pump including:
step S1 is executed: when the flow control rod is adjusted to 100% of flow, the bypass hole is opened at the end of each suction stroke of the plunger, and then the bypass hole is immediately closed at the discharge stroke, so that hydraulic oil pushed by the displacement of the whole plunger is completely applied to the elastic diaphragm;
step S2 is executed: when the flow control rod is adjusted to 50% of the flow, the bypass hole is opened at half of the suction stroke of the plunger, hydraulic oil pushed by the plunger is bypassed from the central hole of the plunger to the oil tank through the bypass hole radially opened by the plunger in the first 50% of the stroke in the next discharge stroke, then the bypass hole is closed by the flow control rod, the rest of the hydraulic oil pushed by the displacement of the 50% plunger is applied to the diaphragm, and the outlet flow is reduced to 50%;
step S3 is executed: when the flow control rod is adjusted to 0, hydraulic oil pushed by the plunger work returns to the oil tank from the central hole of the plunger through the bypass hole which is opened in the radial direction of the plunger, and no hydraulic oil acts on the diaphragm.
Optionally, when the adjusting end of the flow adjusting assembly is adjusted by a knob, the flow control rod can be moved, so that the bypass hole radially arranged on the plunger can be closed at a preset percentage position of the whole plunger stroke, and the flow adjusting range of the hydraulic diaphragm type metering pump is 0-100%.
In order to achieve the third purpose of the invention, the invention provides an intelligent skid-mounted injection device with the hydraulic diaphragm metering pump, wherein the dosage of the hydraulic diaphragm metering pump adopts a field manual adjustment or remote automatic adjustment mode.
Optionally, the remote automatic adjustment uses a frequency changer to change the frequency and thereby the speed of the hydraulic diaphragm metering pump to achieve the purpose of changing the flow rate.
Optionally, the inlet of the hydraulic diaphragm metering pump is provided with a Y-shaped filter, the outlet of the hydraulic diaphragm metering pump is provided with a pressure gauge, the inlet of the pressure gauge is provided with an isolation valve and a pulse voltage stabilizer, the outlet of the hydraulic diaphragm metering pump is further provided with a safety valve and a pipeline for the safety valve to return to the solution tank, and an outlet pressure back pressure valve is configured, and the back pressure valve is communicated with a safety valve pressure discharge pipeline and then returns to the solution tank.
In conclusion, the hydraulic diaphragm type metering pump has the advantages of being simple in structure, stable in operation, free of leakage, high in safety and reliability, extremely small in daily maintenance workload and the like, and is worthy of being popularized and used in the industry.
Drawings
FIG. 1 is a cross-sectional view of a hydraulic diaphragm metering pump of the present invention;
FIG. 2 is a cross-sectional view of the pump head of the hydraulic diaphragm metering pump of the present invention;
FIG. 3 is a cross-sectional view of a hydraulic diaphragm metering device of the present invention;
fig. 4 is a flow chart of a method of regulating the flow of a hydraulic diaphragm metering pump of the present invention.
Detailed Description
For a detailed description of the technical content, constructional features, achieved objects and effects of the present invention, the following detailed description will be given with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, fig. 1 is a cross-sectional view of a hydraulic diaphragm metering pump according to the present invention. Fig. 2 shows a cross-sectional view of the pump head of the hydraulic diaphragm metering pump of the present invention. Fig. 3 shows a cross-sectional view of a hydraulic diaphragm metering device of the present invention. The hydraulic diaphragm metering pump comprises:
the cylinder body 1, a first installation cavity 11 of the driving assembly 2, a second installation cavity 12 of the plunger 3, a third installation cavity 13 of the flow regulating assembly 4 and a fourth installation cavity 14 of the safety valve 5 are sequentially arranged in the cylinder body 1;
a motor 6, a motor shaft 61 of the motor 6 is connected with a worm shaft 21 of the driving assembly 2 through a coupling 7, the worm shaft 21 drives a turbine 22 of the driving assembly 2 to perform rotary motion, and an eccentric wheel 23 integrally arranged with the turbine 22 converts the rotary motion into reciprocating motion through a connecting rod 24 and transmits the reciprocating motion to the plunger 3;
the outer diameter of the plunger 3 is matched with the inner diameter of the cylinder body 1, and is connected with one end of the connecting rod 24 different from the eccentric wheel 23, so that the plunger 3 can reciprocate under the action of the connecting rod 24;
the flow regulating assembly 4 is arranged in the third mounting cavity 13 of the cylinder body 1, the regulating end 41 of the flow regulating assembly 4 is arranged at the end part of the third mounting cavity 13 different from the plunger 3, one end of the flow control rod 42 of the flow regulating assembly 4 is movably arranged in the plunger 3, the other end of the flow control rod is propped against the regulating end 41, and the flow control rod 42 moves under the action of the regulating end 41 so as to control the opening and closing degree of the bypass hole 31 radially arranged on the plunger 3;
a safety valve 5, the safety valve 5 is arranged in a fourth installation cavity 14 of the cylinder body 1, and can enable the released pressure oil to be transmitted back to the oil tank through an internal oil path 15 under the overpressure state;
a pump head 7, wherein the pump head 7 is arranged on the cylinder body 1, and an inlet check valve 71 and an outlet check valve 72 are respectively arranged on the pump head 7;
the diaphragm 8, the diaphragm 8 sets up pump head 7 with between the cylinder body 1, the diaphragm 8 with form the medium chamber 81 between the pump head 7, the diaphragm 8 with form hydraulic pressure chamber 82 between the cylinder body 1, the medium chamber 81 with import check valve 71 and export check valve 72 intercommunication.
As a specific embodiment, the plunger 3 is a hollow plunger with unequal diameters. More specifically, the outer diameter of the end of the plunger 3 connected to the flow control rod 42 is larger than the outer diameter of the end of the plunger 3 connected to the connecting rod 24. One end of the flow control rod 42 is movably disposed in the plunger 3, and can control the opening and closing degree of the bypass hole 31 radially disposed on the plunger 3. The plunger 3 reciprocates in the cylinder 1 by the connecting rod 24. The hydraulic oil 9 is sealingly arranged at the piston chamber 16 of the cylinder 1. The outer diameter of the plunger 3 is matched with the inner diameter of the cylinder body 1.
As a person skilled in the art will readily understand, when the plunger 3 is moved towards one end of the pump head 7, the hydraulic oil 9 is transferred to the tank sequentially through the reduced outer diameter of the plunger 3, the bypass hole 31, and the plunger center hole. When the plunger 3 continues to move toward one end of the pump head 7, the bypass hole 31 radially arranged on the plunger 3 is blocked by the end of the flow control rod 42, so that the bypass of hydraulic oil is stopped, and the hydraulic oil 9 is delivered to the hydraulic cavity 82 at the diaphragm 8 through the diaphragm injection hole 81.
With continued reference to fig. 1-3, when the adjustment end 41 of the flow adjustment assembly 4 is knob-adjusted, the flow control rod 42 may be moved, so that the bypass hole 31 radially disposed on the plunger 3 may be closed at a predetermined percentage position throughout the stroke of the plunger 3, so as to achieve a flow adjustment range of 0-100% for the hydraulic diaphragm metering pump.
When the flow control rod 42 moves toward the plunger 3, the end of the flow control rod 42 rapidly closes the bypass hole 31 of the plunger 3, so that the oil bypass is reduced and the working oil is increased. Similarly, when the metering lever 42 moves away from the plunger 3, the end of the flow lever 42 slowly closes the bypass hole 31 of the plunger 3, and thus the oil bypass increases and the working oil decreases. The plunger 3 reciprocates, pushing hydraulic oil into and out of the hydraulic chamber 82 through the diaphragm injection hole 81. The hydraulic oil pushing and sucking motion acts on the external chemical liquid through the diaphragm 8, and then the liquid is conveyed through the inlet check valve 71 and the outlet check valve 72. Obviously, the flow regulation of the hydraulic diaphragm metering pump according to the present invention is achieved by regulating the bypass return flow through the flow control lever 42, and the flow control lever 42 can achieve different return flows at different positions, i.e. change the effective stroke of the plunger 3, thereby changing the flow.
In order to more intuitively disclose the technical scheme of the invention and highlight the beneficial effects of the invention, the working principle and the flow regulating method of the hydraulic diaphragm metering pump are described with reference to specific embodiments. In the specific embodiments, specifications and shapes of the functional components of the hydraulic diaphragm metering pump, control parameters of the flow rate adjusting method and the like are only examples, and the invention is not limited by the technical scheme.
Referring to fig. 4, and with continued reference to fig. 1-3, fig. 4 is a flow chart illustrating a method for regulating the flow rate of a hydraulic diaphragm metering pump according to the present invention. The flow regulating method of the hydraulic diaphragm metering pump comprises the following steps:
step S1 is executed: when the flow control lever 42 is adjusted to 100% flow, the bypass hole 31 will be opened at the end of each suction stroke of the plunger 3, and then immediately closed at the discharge stroke bypass hole 31, so that the hydraulic oil pushed by the displacement of the entire plunger 3 is entirely applied to the elastic diaphragm 8;
step S2 is executed: when the flow control lever 42 is adjusted to 50% flow, the bypass hole 31 will open at half the suction stroke of the plunger 3, and on the next discharge stroke, the hydraulic oil pushed by the plunger 3 will bypass from the plunger center hole to the tank through the bypass hole 31 radially opened by the plunger 3 on the first 50% stroke, after which the bypass hole 31 is closed by the flow control lever 42, the remaining 50% of the hydraulic oil pushed by the plunger displacement will be applied to the diaphragm 8, and the outlet flow is reduced to 50%;
step S3 is executed: when the flow control rod 42 is adjusted to 0, hydraulic oil pushed by the operation of the plunger 3 is returned to the oil tank from the central hole of the plunger through the bypass hole 31 which is opened radially of the plunger, and no hydraulic oil is applied to the diaphragm 8.
It is readily known that, since the plunger 3 reciprocates with a fixed stroke, it is possible to connect the piston chamber and the tank for a short time at the end of each intake stroke and at the beginning of each discharge stroke, and air or steam is discharged from the hydraulic system for a short time connection period, the lost hydraulic oil being replenished, and also allowing the hydraulic oil to contract and expand due to temperature changes.
The intelligent skid-mounted injection device is provided with the hydraulic diaphragm type metering pump, the dosage of the hydraulic diaphragm type metering pump can be manually adjusted on site or can be remotely and automatically adjusted, and the remote and automatic adjustment adopts a frequency converter to change the frequency so as to change the speed of the hydraulic diaphragm type metering pump to achieve the purpose of changing the flow. The inlet of the hydraulic diaphragm metering pump is provided with a Y-shaped filter, the outlet of the hydraulic diaphragm metering pump is provided with a pressure gauge, and the inlet of the pressure gauge is provided with an isolation valve and a pulse voltage stabilizer. The outlet of the hydraulic diaphragm metering pump is further provided with a safety valve and a pipeline for the safety valve to return to the solution tank, and an outlet pressure back pressure valve is configured, and the back pressure valve is communicated with the safety valve pressure discharge pipeline and then returns to the solution tank.
Clearly, the hydraulic diaphragm metering pump of the present invention has significant advantages over the same type of metering pump, principally in the following respects: (1) The plunger sealing technology is that the plunger and the pump body of the traditional plunger type diaphragm metering pump are sealed by filler, the filler is inevitably worn after a period of use to cause leakage, and the plunger is easy to wear. The plunger and the cylinder body of the hydraulic diaphragm type metering pump are not sealed by adopting any sealing piece, the plunger and the plunger hole are sealed in a clearance fit manner, internal oil supplementing and internal oil return are adopted, and the leakage phenomenon is avoided due to the self structural characteristics. All driving elements are in the oil tank so wear is minimal. (2) The power end of the hydraulic diaphragm type metering pump eliminates a set of N-type crankshaft stroke length adjusting mechanism, so that the plunger reciprocates in a fixed stroke, and the volumetric efficiency and metering accuracy of the pump are ensured. At the end of each suction stroke and at the beginning of each discharge stroke, the piston cavity and the oil tank are connected in a short time, air or steam is discharged from the system in the connection process, lost oil is replenished from the oil tank, and the automatic oil replenishing and steam discharging functions are achieved by the mechanical movement of parts. Compared with a plunger type diaphragm pump, the oil supplementing valve and the exhaust valve are not required to be additionally arranged, and fault generation points are reduced. (3) The built-in safety valve protects, is equipped with inside relief valve in hydraulic pressure chamber part, in case the system breaks down and leads to the superpressure, the relief valve spring is opened to high pressure oil top, and the pressure oil of release returns the oil tank through inside oil circuit to this safe operation of assurance pump. Because the relief valve sets up in the pump is inside completely, once the relief valve work can not bring any influence to the outside of pump, and excreted oil also can not have any leak outward yet, still returns the oil tank and guarantees that the hydraulic pressure part normally works. (4) The flow regulating mechanism is extremely simplified, and the flow regulation of the hydraulic diaphragm type metering pump is realized by regulating the oil return quantity (bypass oil return tank) of hydraulic oil by regulating the position of a control rod in a plunger instead of the eccentric distance of a common metering pump. A complex eccentric adjusting structure is reduced. The plunger operates with a fixed stroke, but the amount of hydraulic oil actually operating is regulated by the control lever, and when the bypass return tank has a small oil flow, and in fact, the effective stroke of the plunger is regulated. The flow regulation is accurate, stable and visual. (5) Compared with the traditional plunger diaphragm metering pump, the hydraulic diaphragm metering pump has the advantages that a plurality of parts are reduced, the manufacturing precision and the assembly precision of the parts are ensured, the volume is reduced, and the volume of the pump is only 1/2 of that of the like product. Because the pump has simple structure and few vulnerable parts, the maintenance amount for daily use is very small, the use is convenient, and the running cost is very low. (6) The diaphragm has long service life, and the diaphragm of the hydraulic diaphragm metering pump is stressed uniformly in the working process, and meanwhile, the oil supplementing and exhausting system of the pump is automatically completed by the working of the plunger, so that the hydraulic part is not subjected to super oil supplementing or oil shortage due to the misoperation of an additional oil supplementing valve and an exhaust valve, and the stress of the diaphragm is unbalanced. The diaphragm of the pump has a long service life and can be used for over 5 years with small flow.
In conclusion, the hydraulic diaphragm type metering pump has the advantages of being simple in structure, stable in operation, free of leakage, high in safety and reliability, extremely small in daily maintenance workload and the like, and is worthy of being popularized and used in the industry.
It will be appreciated by those skilled in the art that various modifications and variations can be made to the invention without departing from the spirit or scope of the invention. Accordingly, the present invention is deemed to cover any modifications and variations, if they fall within the scope of the appended claims and their equivalents.
Claims (12)
1. A hydraulic diaphragm metering pump, comprising:
the cylinder body is internally provided with a first installation cavity of the driving assembly, a second installation cavity of the plunger, a third installation cavity of the flow regulating assembly and a fourth installation cavity of the safety valve in sequence;
the motor shaft of the motor is connected with a worm shaft of the driving assembly through a coupler, the worm shaft drives a turbine of the driving assembly to do rotary motion, and an eccentric wheel integrally arranged with the turbine converts the rotary motion into reciprocating motion through a connecting rod and transmits the reciprocating motion to the plunger;
the outer diameter of the plunger is matched with the inner diameter of the cylinder body, and the plunger is connected with one end of the connecting rod different from the eccentric wheel, so that the plunger can reciprocate under the action of the connecting rod;
the flow regulating assembly is arranged in a third mounting cavity of the cylinder body, the regulating end of the flow regulating assembly is arranged at the end part of the third mounting cavity different from the plunger, one end of a flow control rod of the flow regulating assembly is movably arranged in the plunger, the other end of the flow control rod is propped against the regulating end, and the flow control rod moves under the action of the regulating end so as to control the opening and closing degree of a bypass hole radially arranged on the plunger;
the safety valve is arranged in the fourth mounting cavity of the cylinder body and can enable the released pressure oil to be transmitted back to the oil tank through the internal oil circuit under the overpressure state;
the pump head is arranged on the cylinder body, and an inlet check valve and an outlet check valve are respectively arranged on the pump head;
the diaphragm is arranged between the pump head and the cylinder body, a medium cavity is formed between the diaphragm and the pump head, a hydraulic cavity is formed between the diaphragm and the cylinder body, and the medium cavity is communicated with the inlet check valve and the outlet check valve.
2. The hydraulic diaphragm metering pump of claim 1 in which the plungers are unequal diameter hollow plungers.
3. The hydraulic diaphragm metering pump of claim 2, wherein an outer diameter of an end of the plunger coupled to the flow control rod is greater than an outer diameter of an end of the plunger coupled to the connecting rod.
4. The hydraulic diaphragm metering pump of claim 1, wherein one end of the flow control rod is movably disposed within the plunger and is operable to control the degree of opening and closing of a radially disposed bypass orifice in the plunger.
5. The hydraulic diaphragm metering pump of claim 1, wherein the hydraulic oil seal is disposed at a piston chamber of the cylinder.
6. The hydraulic diaphragm metering pump of claim 5 in which the plunger reciprocates with a fixed stroke, enabling short-time communication between the piston chamber and the reservoir at the end of each intake stroke and at the beginning of each discharge stroke, and during the short-time communication, air or vapor is vented from the hydraulic system and lost hydraulic oil is replenished.
7. The hydraulic diaphragm metering pump of claim 1 wherein the flow control lever is movable upon knob adjustment of the adjustment end of the flow adjustment assembly such that the radially disposed bypass orifice in the plunger is closed at a predetermined percentage position throughout the plunger travel to achieve a flow adjustment range of the hydraulic diaphragm metering pump of 0-100%.
8. A method of regulating a flow of a hydraulic diaphragm metering pump as claimed in claim 1, comprising:
step S1 is executed: when the flow control rod is adjusted to 100% of flow, the bypass hole is opened at the end of each suction stroke of the plunger, and then the bypass hole is immediately closed at the discharge stroke, so that hydraulic oil pushed by the displacement of the whole plunger is completely applied to the elastic diaphragm;
step S2 is executed: when the flow control rod is adjusted to 50% of the flow, the bypass hole is opened at half of the suction stroke of the plunger, hydraulic oil pushed by the plunger is bypassed from the central hole of the plunger to the oil tank through the bypass hole radially opened by the plunger in the first 50% of the stroke in the next discharge stroke, then the bypass hole is closed by the flow control rod, the rest of the hydraulic oil pushed by the displacement of the 50% plunger is applied to the diaphragm, and the outlet flow is reduced to 50%;
step S3 is executed: when the flow control rod is adjusted to 0, hydraulic oil pushed by the plunger work returns to the oil tank from the central hole of the plunger through the bypass hole which is opened in the radial direction of the plunger, and no hydraulic oil acts on the diaphragm.
9. The method of flow regulation of a hydraulic diaphragm metering pump of claim 8 wherein the flow control lever is movable upon knob adjustment of the adjustment end of the flow regulation assembly such that the radially disposed bypass orifice in the plunger is closed at a predetermined percentage position throughout the plunger stroke to achieve a range of flow regulation of the hydraulic diaphragm metering pump of 0 to 100%.
10. An intelligent skid-mounted injection device with the hydraulic diaphragm metering pump according to claim 1, wherein the dosage of the hydraulic diaphragm metering pump is manually adjusted on site or remotely and automatically adjusted.
11. The intelligent skid-mounted dosing apparatus of claim 10, wherein the remote automatic adjustment is achieved by varying the speed of the hydraulic diaphragm dosing pump by varying the frequency using a frequency converter.
12. The intelligent skid-mounted injection device of claim 10, wherein the inlet of the hydraulic diaphragm metering pump is provided with a Y-shaped filter, the outlet of the hydraulic diaphragm metering pump is provided with a pressure gauge, the inlet of the pressure gauge is provided with an isolation valve and a pulse pressure stabilizer, the outlet of the hydraulic diaphragm metering pump is further provided with a safety valve and a pipeline for the safety valve to return to the solution tank, and an outlet pressure back pressure valve is configured, and the back pressure valve is communicated with the safety valve pressure discharge pipeline and then returns to the solution tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311096109.5A CN117145737A (en) | 2023-08-28 | 2023-08-28 | Hydraulic diaphragm type metering pump, intelligent skid-mounted injection device and flow adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311096109.5A CN117145737A (en) | 2023-08-28 | 2023-08-28 | Hydraulic diaphragm type metering pump, intelligent skid-mounted injection device and flow adjusting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117145737A true CN117145737A (en) | 2023-12-01 |
Family
ID=88911204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311096109.5A Pending CN117145737A (en) | 2023-08-28 | 2023-08-28 | Hydraulic diaphragm type metering pump, intelligent skid-mounted injection device and flow adjusting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117145737A (en) |
-
2023
- 2023-08-28 CN CN202311096109.5A patent/CN117145737A/en active Pending
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