CN220828334U - Liquid taking and draining device - Google Patents
Liquid taking and draining device Download PDFInfo
- Publication number
- CN220828334U CN220828334U CN202322327350.6U CN202322327350U CN220828334U CN 220828334 U CN220828334 U CN 220828334U CN 202322327350 U CN202322327350 U CN 202322327350U CN 220828334 U CN220828334 U CN 220828334U
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- liquid
- air
- piston rod
- motor
- connecting plate
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- 239000007788 liquid Substances 0.000 title claims abstract description 72
- 238000000605 extraction Methods 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000007246 mechanism Effects 0.000 abstract description 8
- 238000000018 DNA microarray Methods 0.000 abstract description 7
- 239000000284 extract Substances 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000009396 hybridization Methods 0.000 description 4
- 238000012408 PCR amplification Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The utility model provides a liquid taking and draining device, which comprises: the side part of the air cylinder is provided with an air suction and exhaust port; a motor having an air extraction vent; and a motor, the output end of which is connected with the piston rod of the air cylinder, and the motor drives the piston rod to move for a prescribed stroke, so that a prescribed amount of liquid is extracted or discharged in a mode of extracting or discharging air through the air extraction and exhaust port. This liquid drain device gets simple structure can get the liquid through the negative pressure that extracts, also can produce the pressure drive flowing back through the exhaust, and this liquid drain device that gets compares with current pump liquid mechanism need not components such as oil pump, diaphragm, valve island, has practiced thrift manufacturing cost, has avoided the risk of oil leak in the oil pump use, and practices thrift the space, is suitable for miniaturized biochip check out test set's manufacturing. In addition, the liquid is taken or discharged by the pressure drive generated by the motion of the piston rod of the air cylinder to extract or discharge the gas, and the liquid is not directly contacted with the air cylinder, so that the liquid can be prevented from entering the air cylinder, and the service performance of the air cylinder is ensured.
Description
Technical Field
The utility model relates to the technical field of fluid conveying devices, in particular to a liquid taking and discharging device.
Background
In the prior art, the fluid is conveyed by taking a pump as a main form, and the liquid pumping mechanism can be widely applied to the fields of water supply, power generation, shipbuilding, petrochemical industry and the like. The traditional liquid pumping mechanism has limitations such as large volume, high cost or oil leakage. When the PCR amplification tube is applied to a biochip detection system, a sample in the PCR amplification tube can be pumped into a hybridization reaction cabin for hybridization reaction. But its application in miniaturized biochip detection systems is limited due to the limitations described above.
Disclosure of utility model
Aiming at the problems, the utility model provides the liquid taking and draining device which has a simple structure and low cost and is suitable for miniaturized manufacture.
The utility model provides a liquid taking and draining device, which comprises: the cylinder is provided with an air suction and exhaust port; and a motor, the output end of which is connected with the piston rod of the air cylinder, and the motor drives the piston rod to move for a prescribed stroke, so that a prescribed amount of liquid is extracted or discharged in a mode of extracting or discharging air through the air extraction and exhaust port.
According to the technical scheme, the liquid taking and draining device is simple in structure, can extract or exhaust gas through the air exhaust port of the piston rod in the cylinder, can take liquid through air exhaust to generate negative pressure when being applied to hybridization reaction, can also generate pressure to drive liquid draining through air exhaust, does not need components such as an oil pump, a diaphragm, a valve island and the like compared with the existing liquid pumping mechanism, saves the manufacturing cost of the liquid pumping mechanism, avoids the risk of oil leakage in the use process of the oil pump, has a simple structure, saves space, and is suitable for manufacturing miniaturized biochip detection equipment. In addition, unlike the existing direct pumping liquid taking mode, the pressure driving liquid taking or liquid discharging mode of the embodiment, which utilizes the piston rod motion of the air cylinder to extract or discharge gas, can prevent liquid from directly contacting with the air cylinder, can prevent the liquid from entering the air cylinder to cause the damage of the air cylinder structure, and ensures the service performance of the air cylinder.
In an alternative technical scheme of the utility model, the air cylinders comprise a plurality of air cylinders which are arranged side by side, the liquid taking and draining device also comprises a lower supporting plate, an upper supporting plate and a connecting plate, wherein the lower supporting plate is fixed at the bottoms of the air cylinders, the upper supporting plate is fixed at the tops of the air cylinders, the upper supporting plate is provided with through holes for each piston rod to pass through, and the connecting plate is fixedly connected with the top of each piston rod; the motor is arranged on one side of the air cylinder and is in driving connection with the connecting plate.
According to the technical scheme, the number of the air cylinders is increased, a plurality of samples can be extracted at the same time, the efficiency of the biochip detection process is improved, and the time required by the detection process is shortened; in addition, the liquid taking and draining device is connected with the connecting plate through the lower supporting plate, the upper supporting plate and the connecting plate to form a whole, so that the overall performance of the liquid taking and draining device is improved, and the reasonable spatial layout of the liquid taking and draining device is realized.
In an alternative technical scheme of the utility model, the connecting plate is of a hollow structure.
According to the technical scheme, the hollow structure is beneficial to reducing the weight of the connecting plate and the load of the motor, so that the electric energy of the motor is converted into the kinetic energy of the piston rod to a greater extent, and the energy efficiency is improved.
In an alternative technical scheme of the utility model, the liquid taking and draining device comprises two exhaust cylinders, the two exhaust cylinders share a motor, the motor is positioned between the two exhaust cylinders, and piston rods of the two exhaust cylinders are connected through a connecting plate.
According to the technical scheme, the arrangement mode is beneficial to saving space, miniaturization manufacture of the liquid taking and draining device and improvement of pumping and draining efficiency.
In an alternative technical scheme of the utility model, a detection piece is fixed on the connecting plate, and the extending direction of the detection piece is parallel to the piston rod; the upper supporting plate is fixed with a position sensing piece which is used for sensing the initial position of the piston rod; the motor is configured to control the stroke of the piston rod in accordance with the initial position and the amount of liquid being expelled or withdrawn.
According to the technical scheme, the initial position of the piston rod can be obtained through the position sensing piece and the detecting piece, the stroke or displacement of the piston rod can be calculated by combining the quantity of the liquid taken out/discharged, and on the basis, the algorithm is applied to a driving program of the motor, so that the motor drives the piston rod to move by a specified stroke or displacement, and the extracted volume is accurately controlled.
In the alternative technical scheme of the utility model, the utility model further comprises a guide rod which is fixed with the connecting plate, and through holes for the guide rod to penetrate are correspondingly formed in the connecting plate, the upper supporting plate and the lower supporting plate.
According to the technical scheme, the guide rod can absorb radial displacement of the piston rod of the motor, and guide the piston rod to reciprocate up and down accurately.
In the alternative technical scheme of the utility model, the guide rod further comprises a linear bearing which is positioned between the upper supporting plate and the lower supporting plate, the linear bearing is fixed with the upper supporting plate, and the linear bearing is sleeved outside the guide rod.
According to the technical scheme, the linear bearing can absorb radial displacement of the guide rod and guide the guide rod to move linearly.
In an alternative technical scheme of the utility model, the air suction and exhaust port is arranged on the bottom side wall of the air cylinder, and the top side wall of the air cylinder is also provided with an opening.
According to the technical scheme, the opening and the air suction and exhaust port are arranged in the height direction of the cylinder in a spaced mode, normal operation of the air suction and exhaust is guaranteed, and the air pressure in the cylinder can be balanced through the arrangement of the opening.
In an alternative technical scheme of the utility model, the opening and the air suction and exhaust port are both arranged on one side of the cylinder, which is away from the motor.
According to this technical scheme, opening and bleed gas vent all deviate from the motor setting, can realize more reasonable spatial layout, promote the convenience of use of getting liquid drain.
Drawings
Fig. 1 is a schematic structural diagram of a liquid taking and draining device in an embodiment of the present utility model.
Fig. 2 is a schematic view of the internal structure of a cylinder according to an embodiment of the present utility model.
Reference numerals:
A liquid taking and draining device 1; a cylinder 11; an air extraction exhaust port 111; a piston rod 112; an opening 113; a piston 114; a rear end cap 115; a lower support plate 12; an upper support plate 13; a connection plate 14; a detecting member 15; a position sensing member 16; a guide bar 17; a linear bearing 18; a fastener 19; and a ball screw 2.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 and 2, an embodiment of the present utility model provides a liquid taking and draining device 1, including: the cylinder 11, the lateral part has the air exhaust port 111; a motor (not shown) whose output end is connected to the piston rod 112 of the cylinder 11, and which drives the piston rod 112 to reciprocate by a predetermined stroke, thereby drawing or discharging a predetermined amount of liquid in such a manner that gas is drawn or discharged through the gas-drawing/discharging port 111.
Through the mode, this liquid drain device 1 gets simple structure, can be through the removal of piston rod 112 in cylinder 1 through the extraction of exhaust gas vent 111 extraction or exhaust gas, when being applied to the hybridization reaction, can produce negative pressure through the extraction and get the liquid, also can produce the pressure drive flowing back through the exhaust, this liquid drain device 1 gets compares with current pump liquid mechanism, need not the oil pump, the subassembly such as diaphragm, valve island, has practiced thrift pump liquid mechanism's manufacturing cost, has avoided the risk of oil leak in the oil pump use, and simple structure practices thrift the space, is suitable for miniaturized biochip check out test set's manufacturing. In addition, unlike the existing direct pumping liquid taking mode, the embodiment utilizes the pressure generated by the motion of the piston rod 112 of the cylinder 11 to extract or discharge gas to drive liquid taking or liquid discharging, and the liquid is not directly contacted with the cylinder, so that the damage to the cylinder structure caused by the liquid entering the cylinder can be prevented, and the service performance of the cylinder is ensured.
Specifically, in this embodiment, the cylinder 11 is formed into a cuboid shape with a hollow interior, the bottom of the cylinder 11 is sealed, the top is sealed, a through hole for the piston rod 11 to penetrate is formed in the top, and the air exhaust port 111 is formed in the side part of the cylinder 11, so that the installation and positioning of the cylinder 11 can be facilitated; further, the air extraction and exhaust port 111 is formed on the bottom side wall of the cylinder 11, and the top side wall of the cylinder 11 is further provided with an opening 113. That is, the piston in the cylinder 11 divides the inner space of the cylinder 11 into one end with the piston rod 112 and one end without the piston rod 112, the air exhaust port 111 is positioned at one end without the piston rod 112 in the cylinder cavity, the opening 113 is positioned at one end with the piston rod 112 in the cylinder 11, so as to ensure the sealing of one end without the piston rod 11 of the cylinder 11 and the air pressure balance of one end with the piston rod 112 in the cylinder 11 in the air exhaust process, and ensure the normal operation of the air exhaust. Preferably, the opening 113 and the suction exhaust port 111 are located on the same side of the cylinder 11, which can facilitate the arrangement of the piping communicating with the suction exhaust port 111 and the arrangement of the piping communicating with the opening 113. In some embodiments, the cylinder 11 may be formed with a structure having one sealed end and one open end, the piston rod 112 is disposed in the cylinder 11, and the end of the piston rod 112 passes through the open end of the cylinder, so that the air can be pumped and discharged without providing an opening 113 on the side of the cylinder 11.
In a preferred embodiment of the present utility model, the motor drives the piston rod 112 to reciprocate, which may be in a form that the motor drives the screw rod 2 to rotate and drives a nut (not shown in the figure) on the screw rod 2 to linearly move so as to drive the piston rod 112 to reciprocate to feed or discharge liquid. Specifically, the motor drives the ball screw 2 to rotate, and the nut moves linearly along the ball screw 2 under the rotation of the ball screw 2; the ball screw 2 sequentially penetrates through the lower supporting plate 15, the upper supporting plate 16 and the connecting plate 17, a nut is fixed with the connecting plate 17, and the nut moves to drive the connecting plate 14 and a piston rod 112 connected with the connecting plate 14 to reciprocate up and down. It will be appreciated that other linear motion mechanisms driven by a motor may be used to drive the piston rod 112 for reciprocation, and will not be described in detail herein.
In the preferred embodiment of the utility model, the air cylinders 11 comprise a plurality of air cylinders 11 which are arranged side by side, the liquid taking and draining device 1 further comprises a lower supporting plate 12, an upper supporting plate 13 and a connecting plate 14, wherein the lower supporting plate 12 is fixed at the bottoms of the air cylinders 11, the upper supporting plate 13 is fixed at the tops of the air cylinders 11, the upper supporting plate 13 is provided with through holes for the piston rods 112 to pass through, the connecting plate 14 is fixedly connected with the tops of the piston rods 112, and the motor is arranged at one side of the air cylinders 11 and is connected with the connecting plate 14 to drive the connecting plate 14 to move so as to drive the piston rods 112 to move. By increasing the number of the air cylinders 11, a plurality of samples can be simultaneously extracted, the efficiency of the biochip detection process is improved, and the time required by the detection process is shortened; in addition, the liquid taking and draining device 1 is connected to form a whole through the lower supporting plate 12, the upper supporting plate 13 and the connecting plate 14, so that the overall performance of the liquid taking and draining device 1 is improved, and the reasonable space layout of the liquid taking and draining device 1 is realized. The motor is arranged at the side part of the air cylinder 11 and drives the piston rod 112 to move through driving the connecting plate 14 to move, instead of directly driving the piston rod 112 to reciprocate in the length direction of the piston rod 112, so that the overall height of the pumping device 1 can be reduced, and the occupied space of the pumping device 1 can be saved.
In a preferred embodiment of the present utility model, the connection board 14 is in a hollow structure. The hollow structure is beneficial to reducing the weight of the connecting plate 14 and the load of the motor, so that the electric energy of the motor is converted into the kinetic energy of the piston rod 112 to a large extent, and the energy efficiency is improved.
In a preferred embodiment of the present invention, the piston rod 112 is removably connected to the connecting plate 14. The detachable connection increases the flexibility of the mounting of the piston rod 112 with the connection plate 14, the number of pumping devices 1 being adjustable as required and the pumping devices 1 being replaced. Specifically, the top end of the piston rod 112 passes through the through hole of the connecting plate 14, and the fastener 18 is fixed on the top end of the piston rod 112 passing through the connecting plate 14, so that the connecting plate 14 moves to drive the piston rod 112 to move up and down, and the piston rod 112 cannot fall off from the through hole of the connecting plate 14, thereby improving the stability and reliability of the reciprocating motion.
In a preferred embodiment of the present utility model, the liquid taking and draining device 1 comprises two cylinders 11, the two cylinders 11 share a motor, the motor is located between the two cylinders 11, and piston rods of the two cylinders are connected with the connecting plate 14. The arrangement is beneficial to saving space and miniaturized manufacture of the liquid taking and discharging device 1.
In a preferred embodiment of the utility model, both the opening 113 and the suction and exhaust opening 111 are provided on the side of the cylinder 11 facing away from the motor. Through setting up opening 113 and exhaust gas vent 111 in the outside setting that cylinder 11 deviates from the motor, can realize more reasonable spatial layout, promote the use convenience of getting liquid flowing back device 1, and compare the tip of locating cylinder 11 with exhaust gas vent 111, can be convenient for cylinder 11 and lower backup pad 12, go up backup pad 13 fixed, promote the fixed stability of cylinder 11.
In a preferred embodiment of the present utility model, the connecting plate 14 is fixed with a detecting member 15, and the extending direction of the detecting member 15 is parallel to the piston rod 112; the upper support plate 13 is fixed with a position sensing member 16, and the position sensing member 16 is used for sensing an initial position of the piston rod 112. The initial position of the piston rod 112 can be obtained through the position sensing member 16 and the detecting member 15, and the stroke or displacement of the piston rod 112 can be calculated by combining the amount of liquid taken out/discharged, and on the basis, the algorithm is applied to a driving program of a motor, so that the motor drives the piston rod 112 to move by a specified stroke or displacement, and the volume of the extraction is accurately controlled. Specifically, the position sensing member 16 is a U-shaped/channel-shaped photosensor.
In a preferred embodiment of the present utility model, in order to prevent the piston rod 11 from being radially displaced during the movement, the liquid taking and draining device 1 further includes a guide rod 17 fixed to the connection plate 14, and through holes through which the guide rod 17 passes are formed in correspondence with the connection plate 14, the upper support plate 13, and the lower support plate 12. The guide rod 17 can absorb radial displacement of the piston rod 112 of the motor, and guide the piston rod 112 to precisely reciprocate up and down. Further, it is preferable to further include a fastening member 19, wherein the fastening member 19 is detachably connected to the top end of the piston rod 112/guide rod 17, so that flexibility in mounting the piston rod 112/guide rod 17 to the connection plate 14 is improved, the number of the cylinders 11 can be adjusted as required, and the cylinders 11 can be replaced independently when they fail. Specifically, the top end of the piston rod 112 passes through the through hole of the connecting plate 14, and the fastener 19 is fixed on the top end of the piston rod 112 passing through the connecting plate 14, so that the connecting plate 14 moves to drive the piston rod 112 to move up and down, and the piston rod 112 cannot fall off from the through hole of the connecting plate 14, thereby improving the stability and reliability of the reciprocating motion.
Further, in order to improve the guiding performance of the guiding rod 17, a linear bearing 18 is further provided to limit the radial deflection of the guiding rod 17, the linear bearing 18 is sleeved outside the guiding rod 17, the linear bearing 191 includes a fixing portion and a cylindrical portion, the fixing portion is fixed on the upper surface of the upper support plate 16, and the cylindrical portion penetrates the upper support plate 16 and extends between the upper support plate 16 and the lower support plate 15. In this way, the linear bearing 18 can absorb the radial displacement of the guide rod 17, and guide the piston rod 112 to reciprocate up and down precisely.
In the preferred embodiment of the utility model, the cylinder diameter of the cylinder 11 is 10mm, the stroke is 45mm, the outer diameter of the piston rod 112 is 4mm, the end part of the piston rod 112 is fixed with a piston 114, and the bottom of the cylinder 11 is sealed by a rear end cover 115. In the present embodiment, the size of the single cylinder 11 is small, and the pumping device 1 formed by a plurality of cylinders 11 side by side has a regular structure and is easy to install and position.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (8)
1. A liquid extraction and drainage device, comprising:
the cylinder is provided with an air suction and exhaust port;
the output end of the motor is connected with a piston rod of the air cylinder, and the motor drives the piston rod to move for a specified stroke, so that a specified amount of liquid is extracted or discharged in a mode of extracting or discharging air through the air extraction and exhaust port;
The liquid taking and draining device comprises a plurality of cylinders, a lower supporting plate, an upper supporting plate and a connecting plate, wherein the cylinders are arranged side by side, the lower supporting plate is fixed at the bottoms of the cylinders, the upper supporting plate is fixed at the tops of the cylinders, the upper supporting plate is provided with through holes for the piston rods to pass through, and the connecting plate is fixedly connected with the tops of the piston rods; the motor is arranged on one side of the air cylinder and is connected with the connecting plate.
2. The liquid taking and draining device according to claim 1, wherein the connecting plate is of a hollowed-out structure.
3. The liquid taking and draining device according to claim 1, wherein the liquid taking and draining device comprises two rows of air cylinders, the two rows of air cylinders share the motor, the motor is located between the two rows of air cylinders, and piston rods of the two rows of air cylinders are connected through the connecting plate.
4. The liquid taking and draining device according to claim 2, wherein the connecting plate is fixed with a detecting member, and the extending direction of the detecting member is parallel to the piston rod;
The upper supporting plate is fixed with a position sensing piece which is used for sensing the initial position of the piston rod; the motor is configured to control the stroke of the piston rod in accordance with the initial position and the amount of liquid being expelled or drawn.
5. The liquid taking and draining device according to claim 1, further comprising a guide rod fixed with the connecting plate, wherein through holes for the guide rod to penetrate are correspondingly formed in the connecting plate, the upper supporting plate and the lower supporting plate.
6. The liquid taking and draining device according to claim 5, further comprising a linear bearing between the upper support plate and the lower support plate, wherein the linear bearing is fixed to the upper support plate, and the linear bearing is sleeved outside the guide rod.
7. The liquid taking and draining device according to claim 3, wherein the air suction and exhaust port is formed in the bottom side wall of the air cylinder, and an opening is further formed in the top side wall of the air cylinder.
8. The liquid extraction and drainage device of claim 7, wherein the opening and the suction and drainage port are both disposed on a side of the cylinder facing away from the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322327350.6U CN220828334U (en) | 2023-08-28 | 2023-08-28 | Liquid taking and draining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322327350.6U CN220828334U (en) | 2023-08-28 | 2023-08-28 | Liquid taking and draining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220828334U true CN220828334U (en) | 2024-04-23 |
Family
ID=90723055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322327350.6U Active CN220828334U (en) | 2023-08-28 | 2023-08-28 | Liquid taking and draining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220828334U (en) |
-
2023
- 2023-08-28 CN CN202322327350.6U patent/CN220828334U/en active Active
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