CN113558993A - Double-channel nutrition pump and working method thereof - Google Patents

Double-channel nutrition pump and working method thereof Download PDF

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Publication number
CN113558993A
CN113558993A CN202110956718.8A CN202110956718A CN113558993A CN 113558993 A CN113558993 A CN 113558993A CN 202110956718 A CN202110956718 A CN 202110956718A CN 113558993 A CN113558993 A CN 113558993A
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China
Prior art keywords
infusion
pump
box assembly
guide pipe
assembly
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CN202110956718.8A
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CN113558993B (en
Inventor
庄一飞
邱建明
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Jiangsu Kangbainian Medical Technology Co ltd
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Jiangsu Kangbainian Medical Technology Co ltd
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61JCONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00Feeding-tubes for therapeutic purposes
    • A61J15/0026Parts, details or accessories for feeding-tubes
    • A61J15/0076Feeding pumps
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61JCONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00Feeding-tubes for therapeutic purposes
    • A61J15/0026Parts, details or accessories for feeding-tubes
    • A61J15/008Sensor means, e.g. for sensing reflux, acidity or pressure
    • A61J15/0088Sensor means, e.g. for sensing reflux, acidity or pressure for sensing parameters related to the device
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009Special features
    • F04B43/0081Special features systems, control, safety measures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/08Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/09Pumps having electric drive
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00Testing machines, pumps, or pumping installations
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y02P60/21Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention discloses a double-channel nutrition pump which comprises a panel, wherein the front side of the panel is respectively provided with a turntable, an infusion support, an infusion box assembly and a side panel, the infusion box assembly is connected with the side panel in a buckling mode, the back of the panel is respectively provided with a main motor assembly and a stepping motor, the main motor assembly is in transmission connection with the turntable, and the stepping motor is in transmission connection with the infusion box assembly; the working method adopts a special double-channel nutrient pipeline to infuse nutrient solution into a human body by a double-channel nutrient pump, and the pipeline is automatically switched to be flushed in the process of infusing the nutrient solution so as to prevent the nutrient solution from blocking the pipeline. The invention has simple structure and convenient use; the nutrition pump is provided with two infusion channels, and is matched with a special two-channel infusion pipeline, one infusion channel is used for infusing nutrient solution, and the other infusion channel is used for infusing normal saline or sterile water to flush the pipeline, so that cross infection is avoided, and the workload of medical staff is reduced.

Description

Double-channel nutrition pump and working method thereof
Technical Field
The invention relates to the technical field of medical instruments, in particular to a double-channel nutrition pump and a working method thereof.
Background
The nutrient pump often has the phenomenon of blocking an infusion pipeline in the process of infusing nutrient solution. The clinical solution is to flush the infusion line with saline or sterile water, which is likely to cause cross-infection and increase the workload of medical staff.
Disclosure of Invention
The invention aims to provide a double-channel nutrition pump and a working method thereof, aiming at the defects and shortcomings of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: a binary channels nutrition pump, includes the panel, and its innovation point lies in: the front side of the panel is respectively provided with a turntable, an infusion support, an infusion box assembly and a side panel, the infusion box assembly is connected with the side panel in a buckling mode, the back of the panel is respectively provided with a main motor assembly and a stepping motor, the main motor assembly is in transmission connection with the turntable, and the stepping motor is in transmission connection with the infusion box assembly; the infusion box assembly comprises a front cover and a rear cover, a left torsion spring and a right torsion spring are sleeved between the front cover and the rear cover, a left buckle sliding block and a right buckle sliding block are arranged on the outer sides of the left torsion spring and the right torsion spring and are outwards propped open under the action of the left torsion spring and the right torsion spring, a three-way joint is further arranged between the front cover and the rear cover and comprises three input ends and two output ends, the input ends are respectively provided with a first guide pipe, a second guide pipe and a third guide pipe, the first guide pipe and the second guide pipe are the same output end, a pump silicone tube is arranged between the two output ends, a conduit connecting piece, a pressure measuring silicone tube, a conduit connecting piece and a fourth guide pipe are sequentially arranged above the third guide pipe, an output shaft of a stepping motor penetrates through the rear cover, an infusion switching sliding block, a cam gear shaft and a rack inclined wedge block are respectively arranged on the output shaft, and the stepping motor drives a cam shaft to rotate when rotating, the infusion switching slide block is driven to move leftwards or rightwards, a boss is arranged on the infusion switching slide block and located between the first guide pipe and the second guide pipe, so that the first guide pipe or the second guide pipe is pressed tightly, and the pump is fixed on the infusion support through a silicone tube.
Furthermore, there are two recesses of taking the inclination respectively rack wedge back, the front of left side buckle slider and right buckle slider all sets up the cylinder, the cylinder blocks respectively in the corresponding recess of rack wedge, the inside of side board sets up the draw-in groove, left side buckle slider and right buckle slider are propped open under left torsional spring and right torsional spring's effect outward and are embedded in the draw-in groove and fix.
Furthermore, the front end gear of the cam gear shaft is only provided with a plurality of teeth, and the rack of the rack wedge block is only provided with teeth on the half surface, and the rack wedge block are in meshing transmission connection.
Furthermore, a pressure guide rod is arranged on the rear side of the pressure measuring silicone tube, and a pressure detection circuit board is arranged at the rear end of the pressure guide rod.
Furthermore, the silicone tube for the pump is sleeved on the turntable.
The working method of the double-channel nutrition pump is characterized by comprising the following steps:
s1, a special infusion box assembly is used, the assembly is a disposable sterile product, and the disposable sterile product is assembled when leaving a factory and is correctly loaded into a clamping side panel of the nutrition pump;
s2, the left buckle sliding block and the right buckle sliding block are respectively outwards propped open by the action of the spring force of the left torsion spring and the right torsion spring, the infusion box assembly slides inwards due to the action of the inclined planes at the two ends when being inserted, and the infusion box assembly is outwards flicked open after being inserted in place and is embedded into the clamping grooves of the side panels to fasten the infusion box assembly;
s3, filling the silicone tube for the pump into the turntable assembly, and closing the transparent cover of the nutrition pump;
s4, pressing a start key, starting a main motor assembly, rotating a stepping motor under the control of a program, driving an infusion switching slide block to move rightwards by a cam gear shaft on an output shaft along with the rotation of the stepping motor, pressing a second guide pipe by a boss on the infusion switching slide block, and closing a flushing pipeline;
s5, after the nutrient solution is infused for a period of time, the main motor assembly automatically enters a flushing mode according to a set program, the stepping motor rotates under the control of the program, the cam gear shaft on the output shaft rotates along with the stepping motor to drive the infusion switching slide block to move leftwards, the boss on the infusion switching slide block compresses the first guide tube, the infusion pipeline is closed, the flushing pipeline is opened to flush the pipeline, and after flushing is finished, the infusion mode is automatically entered according to the four steps;
s6, in a standby state, the cam gear shaft is in the middle position, so that the infusion box assembly is convenient to clamp, and after the main motor assembly is started after clamping is finished, the cam gear shaft rotates by about 90 degrees, and the flushing pipeline is closed; when the program enters a flushing mode, the cam gear shaft rotates 180 degrees in the reverse direction; because the gear at the front end of the cam gear shaft only has a plurality of teeth and the rack of the rack wedge block also has teeth on only half surface, the up-and-down movement of the rack wedge block can not be influenced when the flushing mode and the infusion mode are switched;
s7, when infusion is finished, pressing a release key, rotating a stepping motor, driving a rack wedge block to move by a gear at the front end of a cam gear shaft, wherein two grooves with slopes are respectively arranged on the back surface of the rack wedge block, cylinders on a left buckle slide block and a right buckle slide block are respectively clamped in the grooves corresponding to the rack wedge block, driving the left buckle slide block and the right buckle slide block to simultaneously move inwards when the rack wedge block moves, releasing buckles, outwards pulling out an infusion box assembly, releasing a silicone tube for a pump from a turntable assembly, taking out the infusion box assembly, and finishing infusion.
Furthermore, in the infusion process, once the phenomenon of blockage occurs, the equipment generates pressure on the pressure measuring silicone tube in a state without shutdown, and the silicone product has high elasticity, so that the pressure measuring silicone tube is forced to deform, the pressure measuring silicone tube moves towards the pressure detection circuit board through the pressure guide rod, the touch force sensor on the circuit board is pressed, the touch force sensor generates an electric signal, the blockage alarm is generated when the electric signal reaches a set value, and the equipment can automatically stop running.
After adopting the structure, the invention has the beneficial effects that:
the invention has simple structure and convenient use; the nutrition pump is provided with two infusion channels, and is matched with a special two-channel infusion pipeline, one infusion channel is used for infusing nutrient solution, and the other infusion channel is used for infusing normal saline or sterile water to flush the pipeline, so that cross infection is avoided, and the workload of medical staff is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention with the front cover removed;
FIG. 2 is an exploded schematic view of the present invention;
fig. 3 is an exploded view of the infusion cassette assembly of the present invention.
1 panel, 2 turntables, 3 infusion supports, 4 infusion box assemblies, 41 front covers, 42 rear covers, 43 left torsion springs, 44 right torsion springs, 45 left buckle sliders, 451 cylinders, 46 right buckle sliders, 47 three-way connectors, 48 conduit I, 49 conduit II, 410 conduit III, 411 pump silicone tube, 412 conduit connectors, 413 pressure measuring silicone tube, 414 conduit IV, 415 infusion switching sliders, 4151 bosses, 416 cam gear shafts, 417 rack inclined wedge blocks, 5 side panels, 51 clamping grooves, 6 main motor assemblies, 7 stepping motors, 8 pressure guide rods and 9 pressure detection circuit boards.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The nutrient solution is infused into a human body by a special double-channel nutrient pipeline through a double-channel nutrient pump, and the pipeline is automatically switched to be flushed in the process of infusing the nutrient solution so as to prevent the nutrient solution from blocking the pipeline, wherein one pipeline is used for infusing the nutrient solution, and the other pipeline is used for infusing normal saline or sterile water to flush the pipeline, so that cross infection is avoided and the workload of medical staff is reduced; the method comprises the following specific steps:
referring to fig. 1-3, a two-channel nutrition pump comprises a panel 1, wherein the front surface of the panel 1 is respectively provided with a turntable 2, an infusion support 3, an infusion box assembly 4 and a side panel 5, the infusion box assembly 4 is connected with the side panel 5 in a buckling manner, the back of the panel 1 is respectively provided with a main motor assembly 6 and a stepping motor 7, the main motor assembly 6 is in transmission connection with the turntable 2, and the stepping motor 7 is in transmission connection with the infusion box assembly 4; the infusion box assembly 4 comprises a front cover 41 and a rear cover 42, a left torsion spring 43 and a right torsion spring 44 are sleeved between the front cover 41 and the rear cover 42, a left buckling slider 45 and a right buckling slider 46 are arranged on the outer sides of the left torsion spring 43 and the right torsion spring 44 respectively and are outwards propped open under the action of the left torsion spring 43 and the right torsion spring 44, a three-way joint 47 is further arranged between the front cover 41 and the rear cover 42, the three-way joint 47 comprises three input ends and two output ends, the input ends are respectively provided with a first conduit 48, a second conduit 49 and a third conduit 410, the first conduit 48 and the second conduit 49 are the same output end, a pump silicone tube 411 is arranged between the two output ends, a conduit connector 412, a pressure measuring tube 413, a conduit connector 412 and a fourth conduit 414 are sequentially arranged above the third conduit 410, an output shaft of the stepping motor 7 penetrates through the rear cover 42, and an infusion switching slider 415, a cam gear shaft 416 and a rack wedge 417 are respectively arranged on the output shaft, when the stepping motor 7 rotates, the cam gear shaft 416 is driven to rotate to drive the infusion switching slider 415 to move leftwards or rightwards, the infusion switching slider 415 is provided with a boss 4151, the boss 4151 is positioned between the first conduit 48 and the second conduit 49, so that the first conduit 48 or the second conduit 49 is compressed, and the pump silicone tube 411 is fixed on the infusion support 3. Specifically, the working principle and the connection relationship between the turntable 2 and the main motor assembly 6 are the prior art, and are not specifically described in this application.
In this embodiment, the back of the rack wedge 417 has two grooves with slopes, the front surfaces of the left buckle slider 45 and the right buckle slider 46 are provided with cylinders 451, the cylinders 451 are respectively clamped in the grooves corresponding to the rack wedge, the inside of the side panel 5 is provided with a slot 51, and the left buckle slider 45 and the right buckle slider 46 are externally opened under the action of the left torsion spring and the right torsion spring and are embedded in the slot for fixation.
In this embodiment, the front end gear of the cam gear shaft 416 has only a few teeth, and the rack of the rack wedge 417 has only half-surface teeth, and there is a meshing transmission connection between the two, so that the up-and-down movement of the rack wedge is not affected when the flushing mode-infusion mode is switched.
In this embodiment, a pressure guide rod 8 is disposed at the rear side of the pressure measuring silicone tube 413, and a pressure detection circuit board 9 is disposed at the rear end of the pressure guide rod 8. The wall thickness of pressure measurement silicone tube 413 is thinnest in whole infusion pipeline, therefore pressure measurement silicone tube 413 produces deformation, removes to pressure measurement circuit board 9 through pressure guide arm 8 to oppress the touch force sensor on the circuit board, make touch force sensor produce the signal of telecommunication, produce when the signal of telecommunication reaches the setting value and block up the warning, and equipment meeting automatic shutdown moves.
In this embodiment, the silicone tube 411 for the pump is sleeved on the turntable 2.
Example 2
A working method of a double-channel nutrition pump comprises the following steps:
s1, a special infusion box assembly 4 which is a disposable sterile product is correctly arranged in a clamping side panel 5 of the nutrition pump after being assembled when leaving a factory;
s2, a left buckle slide block 45 and a right buckle slide block 46 are respectively stretched outwards by the action of the spring force of the left torsion spring 43 and the right torsion spring 44, the infusion box assembly 4 slides inwards due to the action of the inclined planes at the two ends when being inserted, and springs outwards after being inserted in place, and are embedded into the clamping grooves 51 of the side panels to fasten the infusion box assembly;
s3, the silicone tube 411 for the pump is arranged in the turntable 2 assembly, and the transparent cover of the nutrition pump is closed;
s4, pressing a start key, starting the main motor assembly 6, rotating the stepping motor 7 under the control of a program, rotating the cam gear shaft 416 on the output shaft along with the stepping motor to drive the infusion switching slide block 415 to move rightwards, pressing the second catheter 49 by the boss 4151 on the infusion switching slide block 415, and closing the flushing pipeline;
s5, after the nutrient solution is infused for a period of time, the main motor assembly 6 automatically enters a flushing mode according to a set program, the stepping motor 7 rotates under the control of the program, the cam gear shaft 416 on the output shaft rotates along with the stepping motor to drive the infusion switching slide block 415 to move leftwards, the boss 4151 on the infusion switching slide block 415 compresses the first catheter 48, the infusion pipeline is closed, the flushing pipeline is opened for flushing the pipeline, and after flushing is finished, the infusion mode is automatically entered according to the four steps;
s6, when the infusion box is in a standby state, the cam gear shaft 416 is in the middle position, so that the infusion box assembly can be clamped conveniently, and when the main motor assembly 6 is started after clamping is finished, the cam gear shaft 416 rotates by about 90 degrees, so that the flushing pipeline is closed; when the program enters the flush mode, the cam gear shaft 416 rotates 180 degrees in the reverse direction; because the gear at the front end of the cam gear shaft 416 only has a plurality of teeth and the rack of the rack wedge block also has teeth on only half surface, the up-and-down movement of the rack wedge block can not be influenced when the flushing mode and the infusion mode are switched;
s7, pressing a release key after infusion is finished, rotating the stepping motor 7, driving the rack wedge 417 to move by a gear at the front end of the cam gear shaft 416, respectively forming two grooves with slopes on the back surface of the rack wedge 417, respectively clamping the cylinders 451 on the left clamping slide block 45 and the right clamping slide block 46 in the grooves corresponding to the rack wedge, driving the left clamping slide block 45 and the right clamping slide block 46 to simultaneously move inwards when the rack wedge 417 moves, releasing the clamps, outwards pulling out the infusion box assembly 4, and accordingly pulling out the pump silicone tube 11 from the turntable 2 assembly, taking out the infusion box assembly 4, and finishing infusion.
According to the invention, by utilizing the high elasticity of a silica gel product, once the phenomenon of blockage occurs, the equipment generates pressure on the silica gel tube in a state without shutdown so as to force the silica gel tube to deform, and transmits an alarm signal to the touch force sensor through the pressure guide rod so as to send out a blockage alarm, wherein the blockage alarm comprises the following specific steps:
in the infusion process, in case of the phenomenon blockage, the equipment generates pressure on the pressure measuring silicone tube in a state without shutdown, the pressure on the infusion pipeline is continuously increased, and the silicone product has high elasticity and the pressure measuring silicone tube has the thinnest wall thickness in the whole infusion pipeline, so that the pressure measuring silicone tube is forced to deform, the pressure measuring silicone tube moves towards the pressure detection circuit board through the pressure guide rod and presses the touch force sensor on the circuit board, the touch force sensor generates an electric signal, the blockage alarm is generated when the electric signal reaches a set value, and the equipment can automatically stop running.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (7)

1. A binary channels nutrition pump, includes the panel, its characterized in that: the front side of the panel is respectively provided with a turntable, an infusion support, an infusion box assembly and a side panel, the infusion box assembly is connected with the side panel in a buckling mode, the back of the panel is respectively provided with a main motor assembly and a stepping motor, the main motor assembly is in transmission connection with the turntable, and the stepping motor is in transmission connection with the infusion box assembly; the infusion box assembly comprises a front cover and a rear cover, a left torsion spring and a right torsion spring are sleeved between the front cover and the rear cover, a left buckle sliding block and a right buckle sliding block are arranged on the outer sides of the left torsion spring and the right torsion spring and are outwards propped open under the action of the left torsion spring and the right torsion spring, a three-way joint is further arranged between the front cover and the rear cover and comprises three input ends and two output ends, the input ends are respectively provided with a first guide pipe, a second guide pipe and a third guide pipe, the first guide pipe and the second guide pipe are the same output end, a pump silicone tube is arranged between the two output ends, a conduit connecting piece, a pressure measuring silicone tube, a conduit connecting piece and a fourth guide pipe are sequentially arranged above the third guide pipe, an output shaft of a stepping motor penetrates through the rear cover, an infusion switching sliding block, a cam gear shaft and a rack inclined wedge block are respectively arranged on the output shaft, and the stepping motor drives a cam shaft to rotate when rotating, the infusion switching slide block is driven to move leftwards or rightwards, a boss is arranged on the infusion switching slide block and located between the first guide pipe and the second guide pipe, so that the first guide pipe or the second guide pipe is pressed tightly, and the pump is fixed on the infusion support through a silicone tube.
2. The dual channel nutritional pump of claim 1, wherein: the rack wedge block is characterized in that two grooves with slopes are formed in the back face of the rack wedge block respectively, cylinders are arranged on the front faces of the left buckle sliding block and the right buckle sliding block and are clamped in the grooves corresponding to the rack wedge block respectively, clamping grooves are formed in the side panels, and the left buckle sliding block and the right buckle sliding block are outwards propped open under the action of the left torsion spring and the right torsion spring and are embedded into the clamping grooves to be fixed.
3. The dual channel nutritional pump of claim 1, wherein: the front end gear of the cam gear shaft is only provided with a plurality of teeth, and the rack of the rack wedge block is only provided with teeth on the half surface, and the rack wedge block are in meshing transmission connection.
4. The dual channel nutritional pump of claim 1, wherein: the rear side of the pressure measuring silicone tube is provided with a pressure guide rod, and the rear end of the pressure guide rod is provided with a pressure detection circuit board.
5. The dual channel nutritional pump of claim 1, wherein: the silicone tube for the pump is sleeved on the turntable.
6. A method of operating a dual channel trophic pump according to any one of claims 1-5, comprising the steps of:
s1, a special infusion box assembly is used, the assembly is a disposable sterile product, and the disposable sterile product is assembled when leaving a factory and is correctly loaded into a clamping side panel of the nutrition pump;
s2, the left buckle sliding block and the right buckle sliding block are respectively outwards propped open by the action of the spring force of the left torsion spring and the right torsion spring, the infusion box assembly slides inwards due to the action of the inclined planes at the two ends when being inserted, and the infusion box assembly is outwards flicked open after being inserted in place and is embedded into the clamping grooves of the side panels to fasten the infusion box assembly;
s3, filling the silicone tube for the pump into the turntable assembly, and closing the transparent cover of the nutrition pump;
s4, pressing a start key, starting a main motor assembly, rotating a stepping motor under the control of a program, driving an infusion switching slide block to move rightwards by a cam gear shaft on an output shaft along with the rotation of the stepping motor, pressing a second guide pipe by a boss on the infusion switching slide block, and closing a flushing pipeline;
s5, after the nutrient solution is infused for a period of time, the main motor assembly automatically enters a flushing mode according to a set program, the stepping motor rotates under the control of the program, the cam gear shaft on the output shaft rotates along with the stepping motor to drive the infusion switching slide block to move leftwards, the boss on the infusion switching slide block compresses the first guide tube, the infusion pipeline is closed, the flushing pipeline is opened to flush the pipeline, and after flushing is finished, the infusion mode is automatically entered according to the four steps;
s6, in a standby state, the cam gear shaft is in the middle position, so that the infusion box assembly is convenient to clamp, and after the main motor assembly is started after clamping is finished, the cam gear shaft rotates by about 90 degrees, and the flushing pipeline is closed; when the program enters a flushing mode, the cam gear shaft rotates 180 degrees in the reverse direction; because the gear at the front end of the cam gear shaft only has a plurality of teeth and the rack of the rack wedge block also has teeth on only half surface, the up-and-down movement of the rack wedge block can not be influenced when the flushing mode and the infusion mode are switched;
s7, when infusion is finished, pressing a release key, rotating a stepping motor, driving a rack wedge block to move by a gear at the front end of a cam gear shaft, wherein two grooves with slopes are respectively arranged on the back surface of the rack wedge block, cylinders on a left buckle slide block and a right buckle slide block are respectively clamped in the grooves corresponding to the rack wedge block, driving the left buckle slide block and the right buckle slide block to simultaneously move inwards when the rack wedge block moves, releasing buckles, outwards pulling out an infusion box assembly, releasing a silicone tube for a pump from a turntable assembly, taking out the infusion box assembly, and finishing infusion.
7. The operation method of the two-channel nutrition pump as claimed in claim 6, wherein: in the infusion process, once the phenomenon blockage occurs, the equipment generates pressure on the pressure measuring silicone tube in a state without shutdown, and the silicone product has high elasticity, so that the pressure measuring silicone tube is forced to deform, the pressure measuring silicone tube moves towards the pressure detection circuit board through the pressure guide rod, the touch force sensor on the circuit board is pressed, the touch force sensor generates an electric signal, the blockage alarm is generated when the electric signal reaches a set value, and the equipment can automatically stop running.
CN202110956718.8A 2021-08-20 2021-08-20 Dual-channel nutrition pump and working method thereof Active CN113558993B (en)

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CN113558993B CN113558993B (en) 2023-06-13

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CN115300395A (en) * 2022-08-19 2022-11-08 广州驼人贝康医疗科技有限公司 Double-bag feeding nutrition pump with automatic flushing function

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