CN117738891A - Pneumatic air bag infusion pump and air path control system - Google Patents
Pneumatic air bag infusion pump and air path control system Download PDFInfo
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- CN117738891A CN117738891A CN202211123768.9A CN202211123768A CN117738891A CN 117738891 A CN117738891 A CN 117738891A CN 202211123768 A CN202211123768 A CN 202211123768A CN 117738891 A CN117738891 A CN 117738891A
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- 238000001802 infusion Methods 0.000 title claims abstract description 67
- 239000007788 liquid Substances 0.000 claims abstract description 272
- 239000007787 solid Substances 0.000 claims abstract description 3
- 210000004907 gland Anatomy 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 14
- 208000010727 head pressing Diseases 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000003584 silencer Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 210000004712 air sac Anatomy 0.000 description 5
- 238000010079 rubber tapping Methods 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 230000003749 cleanliness Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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- 238000005530 etching Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 description 1
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- Reciprocating Pumps (AREA)
Abstract
The invention discloses a pneumatic air bag infusion pump, which comprises: the pump head is internally provided with a liquid inlet flow passage and a liquid outlet flow passage; a liquid inlet one-way valve assembly which is arranged on the pump head and is communicated with the liquid inlet end of the liquid inlet flow channel of the pump head; a liquid outlet one-way valve assembly which is arranged on the pump head and is communicated with a liquid outlet end of a liquid outlet flow channel of the pump head; the end face of one side of the solid cylinder is arranged on the side face of the pump head; the air bag is arranged on the side surface of the pump head and positioned in the fixed cylinder body, and the inner cavity of the air bag is respectively communicated with the liquid outlet end of the liquid inlet flow channel and the liquid inlet end of the liquid outlet flow channel; and the pneumatic driving unit is arranged on the end surface of the other side of the fixed cylinder body and used for driving the air bag to stretch or compress. Also discloses a gas path control system comprising the pneumatic air bag infusion pump. The invention can stably and reliably convey the liquid medium.
Description
Technical Field
The invention relates to the technical field of fluid conveying equipment, in particular to a pneumatic air bag infusion pump and an air path control system.
Background
The air bag infusion pump mainly relies on volume change of an air bag inner cavity of an air bag to realize liquid suction and liquid discharge, when the air bag stretches, the volume of the air bag inner cavity increases, the pressure in the air bag inner cavity decreases, a liquid inlet one-way valve is opened, a liquid outlet one-way valve is closed, and liquid is sucked; when the air bag is compressed, the volume of the inner cavity of the air bag is reduced, the pressure in the inner cavity of the air bag is increased, the liquid inlet one-way valve is closed, the liquid outlet one-way valve is opened, and the liquid is discharged.
The pneumatic air bag infusion pump takes compressed air as power, has good safety, is more suitable for liquid medium delivery in flammable and explosive occasions, can not pollute the environment in the working process, has the advantages of high cleanliness, corrosion resistance, stable and reliable working, convenient maintenance and the like, and is particularly suitable for fluid delivery systems in the industries of chip semiconductors, photovoltaic solar cells, light-emitting diodes, liquid crystal displays, electronics and the like.
The current pneumatic air bag infusion pump mainly depends on import in the United states, japan and other countries, which also leads to incomplete industrial chain of the chip semiconductor industry in China and restricts the development of the chip semiconductor industry in China to a certain extent. Meanwhile, the stability of the existing pneumatic air bag infusion pump in the process of conveying liquid medium is still to be further improved so as to meet the increasing process demands.
For this purpose, the applicant has found, through a beneficial search and study, a solution to the above-mentioned problems, against which the technical solutions to be described below are developed.
Disclosure of Invention
One of the technical problems to be solved by the invention is as follows: aiming at the defects of the prior art, the pneumatic air bag infusion pump capable of stably conveying liquid media is provided.
The second technical problem to be solved by the invention is that: the air path control system comprises the pneumatic air bag infusion pump.
A pneumatic bellows infusion pump as a first aspect of the present invention includes:
the pump head is internally provided with a liquid inlet flow passage and a liquid outlet flow passage;
a liquid inlet one-way valve assembly which is arranged on the pump head and is communicated with the liquid inlet end of the liquid inlet flow channel of the pump head;
a liquid outlet one-way valve assembly which is arranged on the pump head and is communicated with a liquid outlet end of a liquid outlet flow channel of the pump head;
the end face of one side of the solid cylinder is arranged on the side face of the pump head;
the air bag is arranged on the side surface of the pump head and positioned in the fixed cylinder body, and the inner cavity of the air bag is respectively communicated with the liquid outlet end of the liquid inlet flow channel and the liquid inlet end of the liquid outlet flow channel; and
and the pneumatic driving unit is arranged on the end surface of the other side of the fixed cylinder and used for driving the air bag to stretch or compress.
In a preferred embodiment of the present invention, the inlet check valve assembly comprises:
the liquid inlet one-way valve is arranged in the pump head, and the liquid outlet end of the liquid inlet one-way valve is communicated with the liquid inlet end of the liquid inlet flow channel of the pump head;
the liquid inlet check valve gland is arranged in the pump head and positioned at the outer side of the liquid inlet check valve and used for compressing the liquid inlet check valve, a liquid inlet channel is formed in the liquid inlet check valve gland, and the liquid outlet end of the liquid inlet channel is communicated with the liquid inlet end of the liquid inlet check valve;
the liquid inlet pump head pressing cap is rotationally arranged on the pump head and used for fixing the liquid inlet one-way valve pressing cover; and
and one end of the liquid inlet pipe is installed on the liquid inlet one-way valve gland through a liquid inlet pipeline joint and is communicated with the liquid inlet end of the liquid inlet channel of the liquid inlet one-way valve gland.
In a preferred embodiment of the invention, the outlet check valve assembly comprises:
the liquid outlet one-way valve is arranged in the pump head, and the liquid inlet end of the liquid outlet one-way valve is communicated with the liquid outlet end of the liquid outlet flow passage of the pump head;
the liquid outlet one-way valve gland is arranged in the pump head and positioned at the outer side of the liquid outlet one-way valve and used for compressing the liquid outlet one-way valve, a liquid outlet channel is formed in the liquid outlet one-way valve gland, and a liquid inlet end of the liquid outlet channel is communicated with a liquid outlet end of the liquid outlet one-way valve;
the liquid outlet pump head pressing cap is rotationally arranged on the pump head and used for fixing the liquid outlet one-way valve pressing cover; and
and one end of the liquid outlet pipe is installed on the liquid outlet one-way valve gland through a liquid outlet pipeline joint and is communicated with the liquid outlet end of the liquid outlet channel of the liquid outlet one-way valve gland.
In a preferred embodiment of the present invention, the liquid inlet check valve or the liquid outlet check valve includes:
the one-way valve body is internally provided with a valve cavity, and one end of the one-way valve body is provided with a liquid outlet through hole communicated with the valve cavity;
a valve needle mounted in the valve cavity of the check valve body;
an elastic piece which is arranged in the valve cavity of the one-way valve body and is positioned between the valve needle and the liquid outlet through hole; and
the check valve pad is arranged at the other end of the check valve body, and a liquid inlet through hole which is communicated with the valve cavity of the check valve body and matched with the needle point part of the valve needle is formed in the check valve pad.
In a preferred embodiment of the invention, the elastic member is a cylindrical spring or a leaf spring.
In a preferred embodiment of the invention, an annular clamping flange is formed at one end of the air bag, which is close to the pump head; when the air bag is installed, the annular clamping flange of the air bag is arranged between the pump head and the fixed cylinder body and is fixed through static extrusion force between the pump head and the fixed cylinder body.
In a preferred embodiment of the invention, a wind bag limiting column used for limiting the compression state of the wind bag is arranged in the wind bag on the side surface of the pump head, a communication channel is formed in the wind bag limiting column, one end of the communication channel is communicated with the inner cavity of the wind bag, and the other end of the communication channel is communicated with the liquid inlet end of the liquid outlet channel of the pump head.
In a preferred embodiment of the invention, the pneumatic drive unit comprises:
the piston cylinder is arranged on the end face of the other side of the fixed cylinder, a piston air chamber is formed in the piston cylinder, and a first air hole and a second air hole are formed in the outer cylinder face of the piston cylinder;
a piston arranged in a piston air chamber of the piston cylinder in a sliding sealing manner, wherein the piston divides the piston air chamber of the piston cylinder into a first air chamber and a second air chamber, the first air chamber is communicated with the first air hole, and the second air chamber is communicated with the second air hole;
the piston rod is arranged in the piston air chamber of the piston cylinder body, one end of the piston rod is connected with the piston, and the other end of the piston rod penetrates through the piston cylinder body and then is connected with the end face, away from the pump head, of the air bag; and
and the position detection assembly is arranged on the piston cylinder body and used for detecting the real-time position of the piston.
In a preferred embodiment of the present invention, the position detecting assembly includes a first position sensor mounted on an outer cylindrical surface of the piston cylinder and located at one end of the piston air chamber, and a second position sensor mounted in the piston cylinder through a sensor mounting seat and located at the other end of the piston air chamber.
In a preferred embodiment of the invention, a first annular sealing ring which is used for sealing and sliding fit with the inner wall of the piston air chamber is arranged on the outer peripheral surface of the piston; and a second annular sealing ring which is used for being in sealing sliding fit with the outer peripheral surface of the piston rod is arranged at the contact position of the piston cylinder body and the piston rod.
In a preferred embodiment of the invention, a pump head pressing plate is arranged on the side surface of the pump head, which is far away from the piston cylinder, and a rear pressing plate is arranged at the end surface of the piston cylinder, which is far away from the pump head; during installation, the long strip-shaped fixing bolts which are arranged at intervals in the circumferential direction sequentially penetrate through the rear pressing plate and the pump head and then are screwed into the pump head pressing plate, so that the rear pressing plate, the pump head pressing plate, the piston cylinder body and the fixing cylinder body are connected into a whole.
In a preferred embodiment of the present invention, the pump head, the liquid inlet check valve, the liquid outlet check valve, the liquid inlet pipe, the liquid outlet pipe, the liquid inlet check valve gland, the liquid outlet check valve gland, the air bag or the air bag limiting column are made of PFA resin or PTFE resin materials.
In a preferred embodiment of the present invention, the present invention further comprises a base disposed below the piston cylinder and fixedly connected to the piston cylinder.
As a second aspect of the present invention, a gas path control system includes:
at least one pneumatic air bag infusion pump;
the air channel control valve is provided with a compressed air inlet end, a first air inlet and outlet end, a second air inlet and outlet end, a first air outlet end and a second air outlet end, the compressed air inlet end of each air channel control valve is connected with compressed air supply equipment through a compressed air pipeline, the first air inlet and outlet end of each air channel control valve is connected with a first air hole of a corresponding pneumatic air bag infusion pump through a first air inlet and outlet pipeline, the second air inlet and outlet end of each air channel control valve is connected with a second air hole of the corresponding pneumatic air bag infusion pump through a second air inlet and outlet pipeline, the first air outlet end of each air channel control valve is connected with the first air outlet pipeline, and the second air outlet end of each air channel control valve is connected with the second air outlet pipeline; and
and the controller is respectively connected with the position detection assembly of the pneumatic driving unit of each pneumatic air bag infusion pump on one hand and each air path control valve on the other hand.
In a preferred embodiment of the invention, a first throttle valve is mounted on each compressed air line; a second throttle valve is arranged on each first exhaust pipeline, and a first silencer is arranged at the air outlet end of each first exhaust pipeline; a third throttle valve is mounted on each second exhaust line, while a second muffler is mounted at the outlet end of each second exhaust line.
Due to the adoption of the technical scheme, the invention has the beneficial effects that: according to the invention, the pneumatic driving unit drives the air bag to stretch or compress, and then the air bag is matched with the opening or closing of the liquid inlet one-way valve assembly and the liquid outlet one-way valve assembly to finish the actions of liquid suction and liquid discharge. When the air bag is in a stretching state, the volume of the inner cavity of the air bag is increased, the pressure of the inner cavity of the air bag is reduced, the liquid inlet one-way valve component is opened, the liquid outlet one-way valve component is closed, and liquid is sucked; when the air bag is in a compressed state, the volume of the inner cavity of the air bag is reduced, the pressure of the inner cavity of the air bag is increased, the liquid inlet one-way valve component is closed, the liquid outlet one-way valve component is opened, and liquid is discharged. The invention can stably and reliably convey the liquid medium and well make up the blank in the domestic technical field.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic three-dimensional structure of a pneumatic bellows infusion pump of the present invention.
Fig. 2 is a transverse cross-sectional view of the pneumatic balloon infusion pump of the present invention in a balloon stretched state.
Fig. 3 is a transverse cross-sectional view of the pneumatic balloon infusion pump of the present invention in a balloon compressed state.
Fig. 4 is a schematic structural diagram of embodiment 1 of the liquid inlet check valve or the liquid outlet check valve of the present invention.
Fig. 5 is a schematic structural diagram of embodiment 2 of the liquid inlet check valve or the liquid outlet check valve of the present invention.
Fig. 6 is a schematic structural diagram of embodiment 1 of the gas circuit control system of the present invention.
Fig. 7 is a schematic structural diagram of embodiment 2 of the air path control system of the present invention.
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
Referring to fig. 1 to 3, there is provided a pneumatic balloon infusion pump 1000 including a pump head 100, a liquid inlet check valve assembly 200, a liquid outlet check valve assembly 300, a fixed cylinder 400, a balloon 500, and a pneumatic drive unit 600.
The pump head 100 is internally provided with a liquid inlet flow channel 110 and a liquid outlet flow channel 120, the lower side surface of the pump head 100 is provided with a liquid inlet one-way valve component mounting groove, and the upper side surface of the pump head 100 is provided with a liquid outlet one-way valve component mounting groove.
The liquid inlet check valve assembly 200 is mounted in the liquid inlet check valve assembly mounting groove of the pump head 100 and communicates with the liquid inlet end of the liquid inlet flow passage 110 of the pump head 100. Specifically, the inlet check valve assembly 200 includes an inlet check valve 210, an inlet check valve gland 220, an inlet pump head cap 230, and an inlet tube 240.
The liquid inlet check valve 210 is installed in the liquid inlet check valve assembly installation groove of the pump head 100, and the liquid outlet end of the liquid inlet check valve 210 is communicated with the liquid inlet end of the liquid inlet flow channel 110 of the pump head 100. The liquid inlet check valve gland 220 is installed in the liquid inlet check valve assembly installation groove of the pump head 100 and is located at the outer side of the liquid inlet check valve 210, and is used for compressing the liquid inlet check valve 210, a liquid inlet channel 221 is formed in the liquid inlet check valve gland 220, and a liquid outlet end of the liquid inlet channel 221 is communicated with a liquid inlet end of the liquid inlet check valve 210. A feed pump head cap 230 is rotatably provided on the pump head 100 for fixing the feed check valve gland 220. One end of the liquid inlet pipe 240 is mounted on the liquid inlet check valve gland 220 through a liquid inlet pipe joint 241 and is communicated with the liquid inlet end of the liquid inlet channel 221 of the liquid inlet check valve gland 220.
The liquid outlet check valve assembly 300 is installed in the liquid outlet check valve assembly installation groove of the pump head 100 and communicates with the liquid outlet end of the liquid outlet channel 120 of the pump head 100. Specifically, the tapping check valve assembly 300 includes a tapping check valve 310, a tapping check valve gland 320, a tapping pump head press cap 330, and a tapping pipe 340.
The liquid outlet check valve 310 is installed in the liquid outlet check valve assembly installation groove of the pump head 100, and the liquid inlet end of the liquid outlet check valve 310 is communicated with the liquid outlet end of the liquid outlet channel 120 of the pump head 100. The liquid outlet check valve gland 320 is installed in the liquid outlet check valve assembly installation groove of the pump head 100 and is located at the outer side of the liquid outlet check valve 310, and is used for compressing the liquid outlet check valve 310, a liquid outlet channel 321 is formed in the liquid outlet check valve gland 320, and a liquid inlet end of the liquid outlet channel 321 is communicated with a liquid outlet end of the liquid outlet check valve 310. The liquid outlet pump head cap 330 is screwed on the pump head 100, and is used for fixing the liquid outlet one-way valve gland 320. One end of the liquid outlet pipe 340 is mounted on the liquid outlet check valve cover 320 through a liquid outlet pipe joint 341 and is communicated with the liquid outlet end of the liquid outlet channel 321 of the liquid outlet check valve cover 320.
The inlet check valve 210 or the outlet check valve 310 have two preferred embodiments, and suitable check valves can be selected according to the process requirements. Referring to fig. 4, a preferred embodiment of the intake check valve 210 or the discharge check valve 310 is shown, which includes a check valve body 211 (311), a valve needle 212 (312), an elastic member 213 (313), and a check valve pad 214 (314).
The valve chamber 2111 (3111) is formed in the check valve body 211 (311), and a liquid outlet through hole 2112 (3112) communicating with the valve chamber 2111 (3111) is formed at one end of the check valve body 211 (311). Valve needle 212 (312) is mounted in valve cavity 2111 (3111) of check valve body 211 (311). The elastic member 213 (313) is installed in the valve chamber 2111 (3111) of the check valve body 211 (311) between the needle 212 (312) and the liquid outlet through hole 2112 (3112). The check valve pad 214 (314) is mounted at the other end of the check valve body 211 (311), and a liquid inlet through hole 2141 (3141) is formed in the check valve pad 214 (314), and the liquid inlet through hole 2141 (3141) is communicated with the valve cavity 2111 (3111) of the check valve body 211 (311) and is matched with the needle tip of the valve needle 212 (312). In this embodiment, the elastic member 213 (313) is a cylindrical spring.
Referring to fig. 5, there is shown another preferred embodiment of the inlet check valve 210a or the outlet check valve 310a, which has substantially the same structure as that of the above preferred embodiment, and includes a check valve body 211a (311 a), a valve needle 212a (312 a), an elastic member 213a (313 a), and a check valve pad 214a (314 a), and the difference is that: the elastic member 213a (313 a) is a leaf spring.
The two embodiments rely on the self gravity of the valve needle 212 (312)/212 a (312 a) and the dual force of the elastic piece 213 (313)/213 a (313 a) to reset timely and accurately, so that the check valve is closed smoothly, the influence of complex media is effectively counteracted, and the stability and reliability of the pneumatic air bag infusion pump in conveying complex media are greatly improved.
One side end surface of the fixed cylinder 400 is mounted on a side surface of the pump head 100.
The air bag 500 is mounted on the side surface of the pump head 100 and is located in the fixed cylinder 400, and the inner cavity of the air bag 500 is respectively communicated with the liquid outlet end of the liquid inlet flow channel 110 and the liquid inlet end of the liquid outlet flow channel 120 of the pump head 100. An annular clamping flange 510 is formed at one end of the air bag 500 close to the pump head 100, and when the air bag is installed, the annular clamping flange 510 of the air bag 500 is arranged between the pump head 100 and the fixed cylinder 400 and is fixed through static extrusion force between the pump head 100 and the fixed cylinder 400.
In addition, a wind bag limiting column 520 is disposed in the wind bag 500 on the side surface of the pump head 100 in a threaded manner, the wind bag limiting column 520 is used for limiting the compression state of the wind bag 500, a communication channel 521 is formed in the wind bag limiting column 520, one end of the communication channel 521 is communicated with the inner cavity of the wind bag 500, and the other end is communicated with the liquid inlet end of the liquid outlet channel 120 of the pump head 100.
The pneumatic driving unit 600 is installed on the other side end surface of the fixed cylinder 400, and serves to drive the bellows 500 to be stretched or compressed. Specifically, pneumatic drive unit 600 includes a piston cylinder 610, a piston 620, a piston rod 630, and a position detection assembly 640.
The piston cylinder 610 is mounted on the other end surface of the fixed cylinder 400, a piston air chamber 611 is formed in the piston cylinder 610, and a first air hole 612a and a second air hole 612b are formed on the outer cylinder surface of the piston cylinder 610.
The piston 620 is slidably and sealingly disposed within the piston air chamber 611 of the piston cylinder 610, the piston 620 dividing the piston air chamber 611 of the piston cylinder 610 into a first air chamber 611a and a second air chamber 611b, the first air chamber 611a being in communication with the first air hole 612a and the second air chamber 611b being in communication with the second air hole 612b.
The piston rod 630 is disposed in the piston air chamber 611 of the piston cylinder 610, one end of the piston rod 630 is connected to the piston 620, and the other end thereof passes through the piston cylinder 610 and is connected to the end surface of the bellows 500 remote from the pump head 100.
A position detection assembly 640 is provided on the piston cylinder 610 for detecting the real-time position of the piston 610. The position detecting assembly 640 includes a first position sensor 641 and a second position sensor 642, the first position sensor 641 is mounted on an outer cylindrical surface of the piston cylinder 610 and located at one end of the piston air chamber 611, the second position sensor 642 is mounted in the piston cylinder 610 through a sensor mounting seat 6421 and located at the other end of the piston air chamber 611, and the sensor mounting seat 6421 is coaxially mounted with the piston 620.
The pneumatic driving unit 600 drives the piston 620 to reciprocate in the piston cylinder 610 by switching the order of air intake and exhaust of the first air hole 612a and the second air hole 612b, thereby driving the piston rod 630 to reciprocate, so that the bellows 500 is formed in a stretched and compressed state. In addition, the first position sensor 641 and the second position sensor 642 of the position detecting assembly 640 can sense the position of the piston 620, thereby controlling the order of intake and exhaust.
In order to improve the air tightness of the pneumatic driving unit 600, a first annular sealing ring 621 is provided on the outer circumferential surface of the piston 620 for sealing and sliding fit with the inner wall of the piston air chamber 611 to ensure the air tightness between the first air chamber 611a and the second air chamber 611 b; meanwhile, a second annular sealing ring 613 for sealing and sliding fit with the outer circumferential surface of the piston rod 630 is provided at a position where the piston cylinder 610 contacts the piston rod 630, ensuring the air tightness of the first air chamber 611a with the outside.
In order to improve the overall structural stability of the pneumatic bellows infusion pump, a pump head pressure plate 710 is provided on the side of the pump head 100 remote from the piston cylinder 610, and a rear pressure plate 720 is provided at the end face of the piston cylinder 610 remote from the pump head 100. During installation, the rear pressing plate 720, the pump head 100, the pump head pressing plate 710, the piston cylinder 610 and the fixing cylinder 400 are connected into a whole by a plurality of strip-shaped fixing bolts 730 which are circumferentially arranged at intervals and sequentially penetrate through the rear pressing plate 720 and the pump head 100 and then are screwed into the pump head pressing plate 710.
The pump head 100, the liquid inlet one-way valve 210, the liquid outlet one-way valve 310, the liquid inlet pipe 240, the liquid outlet pipe 340, the liquid inlet one-way valve gland 220, the liquid outlet one-way valve gland 320, the air bag 500 or the air bag limiting column 510 are made of PFA resin or PTFE resin materials. Because the chip semiconductor production and processing process involves the procedures of precise polishing, grinding, etching, cleaning and the like, certain high-purity chemicals such as hydrofluoric acid (HF), hydrogen Chloride (HCI), sodium hydroxide (NaOH) and other strong acids and strong bases are needed in the process, thereby providing ultra-high requirements on corrosion resistance and high purity for flow path materials, and fluoroplastic such as PTFE and the like can realize the extremely high corrosion resistance and purity required by the chip semiconductor manufacturing.
In addition, the pneumatic air bag infusion pump 1000 of the invention further comprises a base 800, wherein the base 800 is arranged below the piston cylinder 610 and is fixedly connected with the piston cylinder 610 to serve as a support for the whole pump body.
The pneumatic air bag infusion pump 1000 drives the air bag 500 to stretch or compress through the pneumatic driving unit 600, and then is matched with the opening or closing of the liquid inlet one-way valve assembly 200 and the liquid outlet one-way valve assembly 300 to finish the actions of liquid suction and liquid discharge. When the air bag 500 is in a stretching state, the volume of the inner cavity of the air bag is increased, the pressure of the inner cavity of the air bag is reduced, the liquid inlet one-way valve assembly 200 is opened, the liquid outlet one-way valve assembly 300 is closed, and liquid is sucked; when the air bladder 500 is in a compressed state, the volume of the air bladder inner cavity is reduced, the pressure of the air bladder inner cavity is increased, the liquid inlet one-way valve assembly 200 is closed, the liquid outlet one-way valve assembly 300 is opened, and the liquid is discharged. The invention can stably and reliably convey the liquid medium and well make up the blank in the domestic technical field.
Referring to fig. 6, a preferred embodiment of a pneumatic control system is shown, comprising the pneumatic bellows infusion pump 1000, pneumatic control valve 2000, and controller 3000 described above.
The air path control valve 2000 has a compressed air inlet end, a first air inlet and outlet end, a second air inlet and outlet end, a first air outlet end, and a second air outlet end. The compressed air inlet end of the air path control valve 2000 is connected to a compressed air supply device (not shown in the figure) through a compressed air pipe 2100, the first air inlet and outlet end thereof is connected to a first air hole 612a of the pneumatic air bag infusion pump 1000 through a first air inlet and outlet pipe 2200, the second air inlet and outlet end thereof is connected to a second air hole 612b of the pneumatic air bag infusion pump 1000 through a second air inlet and outlet pipe 2300, the first air outlet end thereof is connected to a first air outlet pipe 2400, and the second air outlet end thereof is connected to a second air outlet pipe 2500.
The controller 3000 is connected to the first position sensor 641 and the second position sensor 642 of the position detection assembly 640 of the pneumatic driving unit 600 of the pneumatic air bag infusion pump 1000, respectively, for acquiring the real-time position of the piston 620 of the pneumatic air bag infusion pump 1000, and is connected to the air path control valve 2000, for controlling the air path control valve 2000 to perform pipeline switching.
The controller 3000 controls the valve operation of the air path control valve 2000 by receiving the signals of the first position sensor 641 and the second position sensor 642 of the air bladder infusion pump 1000, thereby controlling the air intake and air exhaust of the first air hole 612a and the second air hole 612b, so that the air bladder infusion pump 1000 completes the liquid suction and liquid discharge operations.
Further, a first throttle valve 2110 is installed on the compressed air line 2100, and the first throttle valve 2110 can adjust the supply amount of the compressed air, thereby adjusting the movement rate of the piston 620. A second throttle valve 2410 is installed on the first exhaust pipe 2400, the second throttle valve 2410 can adjust the amount of exhaust of the first plenum 611a, and simultaneously a first muffler 2420 is installed at the outlet end of the first exhaust pipe 2400 to avoid noise generated during the exhaust process. A third throttle valve 2510 is installed on the second exhaust line 2500, and the third throttle valve 2510 can adjust the exhaust amount of the second air chamber 611b, while a second muffler 2520 is installed at the outlet end of the second exhaust line 2500, to avoid noise generated during the exhaust process.
In some conveying systems, pulsation during medium conveying needs to be reduced as much as possible, a single pneumatic air bag infusion pump alternately performs liquid suction and liquid discharge, continuous infusion is not possible, so that the single pneumatic air bag infusion pump is not suitable for use occasions with pulse requirements, two or more pneumatic air bag infusion pumps are required to be used in parallel, liquid suction and liquid discharge are matched through the two or more pneumatic air bag infusion pumps, one pneumatic air bag infusion pump sucks liquid, the other pneumatic air bag infusion pump discharges liquid, and conversely, the other pneumatic air bag infusion pump sucks liquid when one pneumatic air bag infusion pump discharges liquid, and continuous flow can be realized through the design.
Referring to fig. 7, another preferred embodiment of a pneumatic control system is shown that uses two pneumatic bellows pumps in parallel, including pneumatic bellows pumps 1000a, 1000b, pneumatic control valves 2000a, 2000b, and a controller 3000a.
The air path control valves 2000a and 2000b each have a compressed air inlet end, a first air inlet end, a second air inlet end, a first air outlet end, and a second air outlet end. The compressed air inlet ends of the air path control valves 2000a and 2000b are connected to a compressed air supply device (not shown in the figure) through compressed air pipelines 2100a and 2100b, the first air inlet and outlet ends thereof are connected to the first air holes of the pneumatic air bag infusion pumps 1000a and 1000b through first air inlet and outlet pipelines 2200a and 2200b, the second air inlet and outlet ends thereof are connected to the second air holes of the pneumatic air bag infusion pumps 1000a and 1000b through second air inlet and outlet pipelines 2300a and 2300b, the first air outlet ends thereof are connected to the first air outlet pipelines 2400a and 2400b, and the second air outlet ends thereof are connected to the second air outlet pipelines 2500a and 2500 b.
The controller 3000a is connected to two position sensors in the position detection assembly of the pneumatic driving units of the pneumatic air bag infusion pumps 1000a and 1000b, respectively, and is used for acquiring real-time positions of pistons of the pneumatic air bag infusion pumps 1000a and 1000b, and is connected to the air passage control valves 2000a and 2000b, and is used for controlling the air passage control valves 2000a and 2000b to switch pipelines.
The controller 3000a controls the valve actions of the air path control valves 2000a, 2000b by receiving signals of the first position sensor and the second position sensor of the air bag infusion pumps 1000a, 1000b, thereby controlling the air intake and the air exhaust of the first air hole and the second air hole, so that the air bag infusion pumps 1000a, 1000b complete the liquid suction and the liquid discharge actions. When one pneumatic air bag infusion pump absorbs liquid, the other pneumatic air bag infusion pump discharges liquid, otherwise, when one pneumatic air bag infusion pump discharges liquid, the other pneumatic air bag infusion pump absorbs liquid, and the design can realize continuous flow.
Further, first throttle valves 2110a, 2110b are mounted on the compressed air lines 2100a, 2100b, and the first throttle valves 2110a, 2110b can adjust the supply amount of the compressed air, thereby adjusting the movement rate of the piston. The second throttle valves 2410a and 2410b are installed on the first exhaust pipes 2400a and 2400b, the second throttle valves 2410a and 2410b can adjust the amount of exhaust of the first air chamber, and the first silencers 2420a and 2420b are installed at the outlet ends of the first exhaust pipes 2400a and 2400b, so that noise is prevented from being generated during the exhaust process. The third throttle valves 2510a and 2510b are installed on the second exhaust pipes 2500a and 2500b, the third throttle valves 2510a and 2510b can adjust the exhaust amount of the second air chamber, and meanwhile, the second silencers 2520a and 2520b are installed at the air outlet ends of the second exhaust pipes 2500a and 2500b, so that noise is avoided in the exhaust process.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (15)
1. A pneumatic bellows infusion pump, comprising:
the pump head is internally provided with a liquid inlet flow passage and a liquid outlet flow passage;
a liquid inlet one-way valve assembly which is arranged on the pump head and is communicated with the liquid inlet end of the liquid inlet flow channel of the pump head;
a liquid outlet one-way valve assembly which is arranged on the pump head and is communicated with a liquid outlet end of a liquid outlet flow channel of the pump head;
the end face of one side of the solid cylinder is arranged on the side face of the pump head;
the air bag is arranged on the side surface of the pump head and positioned in the fixed cylinder body, and the inner cavity of the air bag is respectively communicated with the liquid outlet end of the liquid inlet flow channel and the liquid inlet end of the liquid outlet flow channel; and
and the pneumatic driving unit is arranged on the end surface of the other side of the fixed cylinder and used for driving the air bag to stretch or compress.
2. The pneumatic bellows infusion pump of claim 1 wherein said inlet check valve assembly comprises:
the liquid inlet one-way valve is arranged in the pump head, and the liquid outlet end of the liquid inlet one-way valve is communicated with the liquid inlet end of the liquid inlet flow channel of the pump head;
the liquid inlet check valve gland is arranged in the pump head and positioned at the outer side of the liquid inlet check valve and used for compressing the liquid inlet check valve, a liquid inlet channel is formed in the liquid inlet check valve gland, and the liquid outlet end of the liquid inlet channel is communicated with the liquid inlet end of the liquid inlet check valve;
the liquid inlet pump head pressing cap is rotationally arranged on the pump head and used for fixing the liquid inlet one-way valve pressing cover; and
and one end of the liquid inlet pipe is installed on the liquid inlet one-way valve gland through a liquid inlet pipeline joint and is communicated with the liquid inlet end of the liquid inlet channel of the liquid inlet one-way valve gland.
3. The pneumatic bellows infusion pump of claim 2 wherein said outlet check valve assembly comprises:
the liquid outlet one-way valve is arranged in the pump head, and the liquid inlet end of the liquid outlet one-way valve is communicated with the liquid outlet end of the liquid outlet flow passage of the pump head;
the liquid outlet one-way valve gland is arranged in the pump head and positioned at the outer side of the liquid outlet one-way valve and used for compressing the liquid outlet one-way valve, a liquid outlet channel is formed in the liquid outlet one-way valve gland, and a liquid inlet end of the liquid outlet channel is communicated with a liquid outlet end of the liquid outlet one-way valve;
the liquid outlet pump head pressing cap is rotationally arranged on the pump head and used for fixing the liquid outlet one-way valve pressing cover; and
and one end of the liquid outlet pipe is installed on the liquid outlet one-way valve gland through a liquid outlet pipeline joint and is communicated with the liquid outlet end of the liquid outlet channel of the liquid outlet one-way valve gland.
4. The pneumatic bellows infusion pump of claim 3 wherein said inlet or outlet check valve comprises:
the one-way valve body is internally provided with a valve cavity, and one end of the one-way valve body is provided with a liquid outlet through hole communicated with the valve cavity;
a valve needle mounted in the valve cavity of the check valve body;
an elastic piece which is arranged in the valve cavity of the one-way valve body and is positioned between the valve needle and the liquid outlet through hole; and
the check valve pad is arranged at the other end of the check valve body, and a liquid inlet through hole which is communicated with the valve cavity of the check valve body and matched with the needle point part of the valve needle is formed in the check valve pad.
5. The pneumatic bellows infusion pump of claim 4, wherein the resilient member is a cylindrical spring or a leaf spring.
6. The pneumatic air bag infusion pump of claim 1, wherein an annular clamping flange is formed at one end of the air bag close to the pump head; when the air bag is installed, the annular clamping flange of the air bag is arranged between the pump head and the fixed cylinder body and is fixed through static extrusion force between the pump head and the fixed cylinder body.
7. The pneumatic air bag infusion pump according to claim 1, wherein an air bag limiting column used for limiting the compression state of the air bag is arranged in the air bag on the side face of the pump head, a communication channel is formed in the air bag limiting column, one end of the communication channel is communicated with the inner cavity of the air bag, and the other end of the communication channel is communicated with the liquid inlet end of the liquid outlet channel of the pump head.
8. The pneumatic bellows infusion pump of any one of claims 3 to 7, wherein the pneumatic drive unit comprises:
the piston cylinder is arranged on the end face of the other side of the fixed cylinder, a piston air chamber is formed in the piston cylinder, and a first air hole and a second air hole are formed in the outer cylinder face of the piston cylinder;
a piston arranged in a piston air chamber of the piston cylinder in a sliding sealing manner, wherein the piston divides the piston air chamber of the piston cylinder into a first air chamber and a second air chamber, the first air chamber is communicated with the first air hole, and the second air chamber is communicated with the second air hole;
the piston rod is arranged in the piston air chamber of the piston cylinder body, one end of the piston rod is connected with the piston, and the other end of the piston rod penetrates through the piston cylinder body and then is connected with the end face, away from the pump head, of the air bag; and
and the position detection assembly is arranged on the piston cylinder body and used for detecting the real-time position of the piston.
9. The pneumatic bellows infusion pump of claim 8, wherein the position detection assembly includes a first position sensor mounted on an outer cylindrical surface of the piston cylinder at one end of the piston air chamber and a second position sensor mounted in the piston cylinder through a sensor mount at the other end of the piston air chamber.
10. The pneumatic air bag infusion pump according to claim 8, wherein a first annular sealing ring for sealing and sliding fit with the inner wall of the piston air chamber is arranged on the outer peripheral surface of the piston; and a second annular sealing ring which is used for being in sealing sliding fit with the outer peripheral surface of the piston rod is arranged at the contact position of the piston cylinder body and the piston rod.
11. The pneumatic bellows infusion pump of claim 8, wherein a pump head pressure plate is provided on a side of the pump head remote from the piston cylinder, and a rear pressure plate is provided at an end face of the piston cylinder remote from the pump head; during installation, the long strip-shaped fixing bolts which are arranged at intervals in the circumferential direction sequentially penetrate through the rear pressing plate and the pump head and then are screwed into the pump head pressing plate, so that the rear pressing plate, the pump head pressing plate, the piston cylinder body and the fixing cylinder body are connected into a whole.
12. The pneumatic bellows infusion pump of claim 8, wherein the pump head, the inlet check valve, the outlet check valve, the inlet tube, the outlet tube, the inlet check valve gland, the outlet check valve gland, the bellows or the bellows stopper is made of PFA resin or PTFE resin material.
13. The pneumatic bellows infusion pump of claim 8, further comprising a base disposed below and fixedly connected to the piston cylinder.
14. A gas circuit control system, comprising:
at least one pneumatic air bag infusion pump;
the air channel control valve is provided with a compressed air inlet end, a first air inlet and outlet end, a second air inlet and outlet end, a first air outlet end and a second air outlet end, the compressed air inlet end of each air channel control valve is connected with compressed air supply equipment through a compressed air pipeline, the first air inlet and outlet end of each air channel control valve is connected with a first air hole of a corresponding pneumatic air bag infusion pump through a first air inlet and outlet pipeline, the second air inlet and outlet end of each air channel control valve is connected with a second air hole of the corresponding pneumatic air bag infusion pump through a second air inlet and outlet pipeline, the first air outlet end of each air channel control valve is connected with the first air outlet pipeline, and the second air outlet end of each air channel control valve is connected with the second air outlet pipeline; and
and the controller is respectively connected with the position detection assembly of the pneumatic driving unit of each pneumatic air bag infusion pump on one hand and each air path control valve on the other hand.
15. The air circuit control system of claim 14 wherein a first throttle valve is mounted on each compressed air line; a second throttle valve is arranged on each first exhaust pipeline, and a first silencer is arranged at the air outlet end of each first exhaust pipeline; a third throttle valve is mounted on each second exhaust line, while a second muffler is mounted at the outlet end of each second exhaust line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211123768.9A CN117738891A (en) | 2022-09-15 | 2022-09-15 | Pneumatic air bag infusion pump and air path control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211123768.9A CN117738891A (en) | 2022-09-15 | 2022-09-15 | Pneumatic air bag infusion pump and air path control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117738891A true CN117738891A (en) | 2024-03-22 |
Family
ID=90279923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211123768.9A Pending CN117738891A (en) | 2022-09-15 | 2022-09-15 | Pneumatic air bag infusion pump and air path control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117738891A (en) |
-
2022
- 2022-09-15 CN CN202211123768.9A patent/CN117738891A/en active Pending
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