CN110780084B - Pump structure for flow injection analyzer - Google Patents
Pump structure for flow injection analyzer Download PDFInfo
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- CN110780084B CN110780084B CN201910876397.3A CN201910876397A CN110780084B CN 110780084 B CN110780084 B CN 110780084B CN 201910876397 A CN201910876397 A CN 201910876397A CN 110780084 B CN110780084 B CN 110780084B
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- conveying pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/08—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a stream of discrete samples flowing along a tube system, e.g. flow injection analysis
- G01N35/085—Flow Injection Analysis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0193—Arrangements or apparatus for facilitating the optical investigation the sample being taken from a stream or flow to the measurement cell
Abstract
The invention discloses a pump structure for a flow injection analyzer, and aims to overcome the defect that a pump tube of a peristaltic pump for the flow injection analyzer is easy to damage and causes a liquid leakage phenomenon. The device comprises a liquid storage tank, a liquid conveying pipe, a driving rotating shaft and a transmission inhaul cable, wherein the transmission inhaul cable comprises a pull rope and a plurality of piston balls, the transmission inhaul cable penetrates through the liquid conveying pipe and is wound on the driving rotating shaft, the liquid conveying pipe is provided with a liquid outlet, a deformable positioning convex ring is arranged on the front side of the liquid outlet on the inner wall of the liquid conveying pipe, a plurality of pushing plugs are arranged in the piston balls, the end parts of the pushing plugs extend out of the front side surfaces of the piston balls and can be abutted against the positioning convex rings, return springs are connected between the pushing plugs and the piston balls, connecting rods are correspondingly hinged in the piston balls and the pushing plugs, one ends of the connecting rods are hinged on the pushing plugs, the other ends of the connecting rods are hinged with push rods, the push rods are connected with clamping blocks through linkage springs, and the clamping blocks are clamped on the pull rope; the clamping block is provided with a wedge block, the back side surface of the piston ball is provided with a pressure rod, and the pressure rod moves forwards to drive the clamping block to move towards the pull rope.
Description
Technical Field
The present invention relates to a flow injection analyzer, and more particularly, to a pump structure for a flow injection analyzer.
Background
The flow injection analyzer is characterized in that pump pipes with different pipe diameters are compressed through a peristaltic pump according to a continuous flow method, a reaction reagent and a sample to be detected are injected into a closed and continuous flow carrier according to a proportion, a color reaction occurs in a chemical reaction unit, a signal value of the color reaction is measured in a detector, and the concentration of the sample to be detected is measured according to a standard curve method. At present, the flow injection analyzer is widely applied to the analysis of water quality, in particular to the analysis of large-batch water samples. The pump pipe is used as an important component of the flow injection analyzer and plays a crucial role in analysis, once the pump pipe has a problem, the analysis cannot be normally carried out, and data are detected to be abnormal. When the peristaltic pump works, the hose is rolled by the rollers to convey liquid, friction is required between the rollers and the hose continuously, the hose deforms, the hose is damaged greatly, and the hose is damaged easily, so that liquid leakage is caused.
Disclosure of Invention
The invention overcomes the defect that the pump pipe of the peristaltic pump for the flow injection analyzer is easy to damage to cause liquid leakage, and provides the pump structure for the flow injection analyzer.
In order to solve the technical problems, the invention adopts the following technical scheme: a pump structure for a flow injection analyzer comprises a liquid storage tank, a liquid conveying pipe, a driving rotating shaft and a transmission cable, wherein the liquid conveying pipe is arranged in a roundabout mode, two ends of the liquid conveying pipe are communicated with the liquid storage tank, the transmission cable comprises a pull rope and a plurality of piston balls, pull rope through holes are formed in the piston balls, the pull rope penetrates through the pull rope through holes to connect the piston balls in series, the transmission cable is connected end to end, penetrates through the liquid conveying pipe and is wound on the driving rotating shaft, the driving rotating shaft is connected with a driving motor in a transmission mode, the piston balls are matched with the liquid conveying pipe, the driving rotating shaft rotates to drive the piston balls to move forwards in the liquid conveying pipe, a liquid outlet is formed in the liquid conveying pipe, a deformable positioning convex ring is arranged on the front side of the liquid outlet in the inner wall of the liquid conveying pipe, a plurality of pushing plugs are arranged in the piston balls, the end portions of the pushing plugs extend out of the front side surfaces of the piston balls and can abut against the positioning convex rings, return springs are connected between the pushing plugs, connecting rods are correspondingly hinged in the piston balls, one ends of the pushing plugs, one ends of the connecting rods are hinged to the pushing plugs, the other ends of the pushing rods are hinged to push rods, the push rods can be slidably arranged in the piston balls, the push rods are connected with clamping blocks through linkage springs, and clamped on the pull rope; the rear side surface of the piston ball is provided with a positioning groove, the clamping block is provided with a wedge block, the wedge block is provided with a pushing surface which is obliquely arranged, the bottom surface of the positioning groove is provided with a plurality of pressing rods which are arranged in one-to-one correspondence with the wedge block, the front end of each pressing rod is provided with a driving surface which is obliquely arranged, the driving surface is attached to the pushing surface, the rear end of each pressing rod extends backwards to form the bottom surface of the positioning groove, and a reset spring is connected between each pressing rod and the piston ball.
The during operation, the drive pivot rotates and drives the piston ball and move forward in the transfer line, and the piston ball of arranging in the liquid reserve tank constantly gets into the transfer line, and the piston ball gets into the transfer line and moves the in-process forward, and transfer line open position forms the negative pressure and inhales the transfer line with the current-carrying liquid in the liquid reserve tank in, and the current-carrying liquid moves in the transfer line along with the piston ball together. After the piston ball reaches the positioning convex ring position, the pushing plug extending outwards abuts against the positioning convex ring, the pushing plug moves inwards, the connecting rod is driven to rotate, the connecting rod drives the push rod to move towards the direction away from the pull rope, the clamping block is separated from the pull rope, friction between the pull rope and the pull rope through hole is small at the moment, along with continuous rotation of the driving rotating shaft, the pull rope continues to move forwards, the piston ball at the positioning convex ring position keeps still, the pull rope moves in the pull rope through hole in the piston ball, the piston ball at the rear side continues to be pulled forwards, the liquid outlet is close to the rear side of the positioning convex ring, the distance between the piston ball at the positioning convex ring position and a piston ball behind the piston ball is gradually reduced, the carrier fluid is squeezed out of the liquid outlet, when the surface of a rear piston ball is attached to a positioning groove of a front piston ball, the pressing rod is pushed forwards, the driving surface on the pressing rod pushes the pushing plug to move towards the direction close to the pull rope, so that the clamping block clamps the pull rope, and along with continuous increase of tension, the piston ball attached to the positioning convex ring is pulled away from the position, and the clamping block moves towards the pull rope, and the clamping block is driven by the pull rope to move along with the pull rope. At the moment, the latter piston ball is abutted to the positioning convex ring again, and the process is repeated, so that the carrier fluid is continuously discharged from the fluid outlet. And residual carrier fluid between two adjacent piston balls flows back into the liquid storage tank. The pump achieves the effect of a peristaltic pump when in work, but the pump pipe cannot be extruded and deformed, is not easy to damage, avoids the phenomenon of damage and leakage, and has long service life and good infusion effect.
Preferably, the infusion tube comprises a front-section tube and a rear-section tube, the positioning convex ring is arranged at the connecting position of the front-section tube and the rear-section tube, an outer ring notch is arranged on the outer wall of the front-section tube and connected with the connecting position of the rear-section tube, an inner ring notch is arranged on the inner wall of the rear-section tube and connected with the connecting position of the front-section tube, the outer ring notch of the front-section tube and the inner ring notch of the rear-section tube are connected together in a sleeved mode, a positioning ring is tightly mounted at the position of the inner ring notch of the rear-section tube, a rear positioning ring groove is formed in the outer wall of the front end of the positioning ring, a front positioning ring groove is formed in the outer wall of the rear end of the front-section tube, connecting rings are arranged at the front end and the rear end of the positioning convex ring, and are respectively and tightly connected into the front positioning ring groove and the rear positioning ring groove.
The front section pipe and the rear section pipe are connected together to form a transfusion pipe, so that the positioning convex ring is convenient to install and arrange, the positioning convex ring is stable and reliable to install, the sealing performance is good, the positioning convex ring has certain deformation resistance, and the piston ball can deform to pass through.
Preferably, an avoidance ring groove is formed in the outer wall of the positioning convex ring. The arrangement of the avoiding ring groove provides space for the deformation of the positioning convex ring, and is favorable for the piston ball to pass through the positioning convex ring.
Preferably, the inner wall of the positioning convex ring comprises a ball ring section and an inclined section, and the ball ring section is matched with the piston ball. The spherical ring section is convenient for pushing the pushing plug inwards, and has good sealing effect with the piston ball. The inclined section is favorable for improving the structural strength of the positioning convex ring.
Preferably, a positioning spring is arranged between the push rod and the piston ball. The positioning spring is arranged to facilitate reliable positioning of the push rod.
Preferably, the outer surface of the piston ball is provided with a buffer sealing layer. The arrangement of the buffering sealing layer is beneficial to improving the sealing performance between the piston ball and the inner wall of the infusion tube.
Preferably, the piston ball is internally provided with an installation cavity, the push rod, the clamping block, the connecting rod and the pushing plug are all arranged in the installation cavity, and the surface of the piston ball is fixedly connected with a sealing block for sealing the installation cavity. The arrangement of the installation cavity is convenient for the installation and arrangement of each part in the piston ball.
Preferably, one end of the infusion tube is provided with a liquid inlet, the piston ball enters the infusion tube from the liquid inlet, and the liquid inlet is of a bell-mouth-shaped structure. The bell-mouth-shaped liquid inlet plays a role in guiding the piston ball on one hand, so that the piston ball can conveniently enter the infusion tube, and carrier liquid can conveniently enter the infusion tube on the other hand.
Preferably, the push rod is of an I-shaped structure, and the connecting rod is connected to the position, close to the middle, of the push rod. The push rod of this structure moves reliably.
Preferably, the positions close to the two ends in the stay rope through hole are both provided with sealing rings. The sealing performance between stay cord and the stay cord through-hole has been increased to the sealing washer.
Compared with the prior art, the invention has the beneficial effects that: the pump pipe of the pump structure for the flow injection analyzer is not easy to damage, avoids the liquid leakage phenomenon, and has long service life and good infusion effect.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is an enlarged partial schematic view of the present invention;
in the figure: 1. the liquid storage tank comprises a liquid storage tank body, 2, an infusion tube, 3, a driving rotating shaft, 4, a pull rope, 5, a piston ball, 6, a pull rope through hole, 7, a sealing ring, 8, a liquid inlet, 9, a liquid outlet, 10, a positioning convex ring, 11, a ball ring section, 12, an inclined section, 13, a pushing plug, 14, a mounting hole, 15, a limiting plug, 16, a pushing head, 17, an extension rod, 18, an abutting surface, 19, a return spring, 20, a connecting rod, 21, a pushing rod, 22, a positioning spring, 23, a linkage spring, 24, a clamping block, 25, a positioning groove, 26, a wedge block, 27, a pushing surface, 28, a pressing rod, 29, a driving surface, 30, a return spring, 31, a mounting cavity, 32, a sealing block, 33, a front section tube, 34, a rear section tube, 35, an outer ring notch, 36, an inner ring notch, 37, a positioning ring, 38, a rear positioning ring groove, 39, a front positioning ring groove, 40, 41, a guide surface, 42 and an avoiding ring groove.
Detailed Description
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
example (b): the utility model provides a pump structure (see figure 1, figure 2) for flowing injection analysis appearance, includes liquid reserve tank 1, transfer line 2, drive pivot 3, transmission cable, in the transfer line circuitous setting and both ends all communicate the liquid reserve tank, the transfer line circuitous is oval structure, the transmission cable includes stay cord 4, a plurality of piston ball 5, is equipped with stay cord through-hole 6 on the piston ball, the stay cord runs through the stay cord through-hole and establishes ties the piston ball together, be close to both ends position in the stay cord through-hole and all install sealing washer 7. The transmission inhaul cable is connected end to end, penetrates through the infusion tube and is wound on the driving rotating shaft, the driving rotating shaft is connected with the driving motor in a transmission mode, the piston ball is matched with the infusion tube, the outer surface of the piston ball is provided with a layer of buffering sealing layer, and the driving rotating shaft rotates to drive the piston ball to move forwards in the infusion tube. One end of the infusion tube is provided with a liquid inlet 8, the piston ball enters the infusion tube from the liquid inlet, and the liquid inlet is in a horn-mouth structure.
The infusion tube is provided with a liquid outlet 9, the front side of the liquid outlet on the inner wall of the infusion tube is provided with a deformable positioning convex ring 10, the inner wall of the positioning convex ring comprises a spherical ring section 11 and an inclined section 12, and the spherical ring section is matched with the piston ball. A plurality of pushing plugs 13 of installation in the piston ball, the setting of promotion stopper equipartition, but promote stopper tip to extend piston ball front side surface and butt to the location bead on, the piston ball is gone up and is equipped with mounting hole 14 with the promotion stopper corresponding position, mounting hole open position fastening connection stopper 15, it is equipped with promotion head 16 to promote stopper one end, the other end is equipped with extension rod 17, it is equipped with the butt face 18 that the slope set up to promote the head tip, it runs through spacing stopper to promote the head, it is less than the radius of piston ball to promote the head tip to the distance at piston ball center.
A return spring 19 is connected between the pushing plug and the piston ball, the return spring is sleeved on an extension rod, a connecting rod 20 is correspondingly hinged with the pushing plug in the piston ball, one end of the connecting rod is hinged on the extension rod of the pushing plug, the other end of the connecting rod is hinged with a push rod 21, and the push rod is slidably mounted in the piston ball. The push rod is in an I-shaped structure, and the connecting rod is connected to the position, close to the middle, of the push rod. A positioning spring 22 is arranged between the push rod and the piston ball. The push rod is connected with a clamping block 24 through a linkage spring 23, the clamping block is clamped on the pull rope, and the surface of the clamping block, which is clamped with the pull rope, is of an inwards concave arc structure.
The rear side surface of the piston ball is provided with a positioning groove 25 which is in a spherical crown structure. The clamping block is provided with a wedge block 26, the wedge block is provided with a pushing surface 27 which is obliquely arranged, the bottom surface of the positioning groove is provided with a plurality of pressure rods 28 which are arranged corresponding to the wedge block one by one, the front end of each pressure rod is provided with a driving surface 29 which is obliquely arranged, the driving surface is attached to the pushing surface, the rear end of each pressure rod extends backwards to form the bottom surface of the positioning groove, and a reset spring 30 is connected between each pressure rod and the piston ball. The pressing rod moves backwards to push the clamping block towards the pull rope. The piston ball is internally provided with a mounting cavity 31, the push rod, the clamping block, the connecting rod and the pushing plug are all arranged in the mounting cavity, and the surface of the piston ball is fixedly connected with a sealing block 32 for sealing the mounting cavity.
The infusion tube comprises a front-section tube 33 and a rear-section tube 34, a positioning convex ring is arranged at the connecting position of the front-section tube and the rear-section tube, an outer ring notch 35 is arranged on the outer wall of the front-section tube and connected with the rear-section tube, an inner ring notch 36 is arranged on the inner wall of the rear-section tube and connected with the connecting position of the front-section tube, the outer ring notch of the front-section tube is sleeved and connected with the inner ring notch of the rear-section tube, a positioning ring 37 is tightly mounted at the inner ring notch of the rear-section tube, a rear positioning ring groove 38 is arranged on the outer wall of the front end of the positioning ring, a front positioning ring groove 39 is arranged on the outer wall of the rear end of the front-section tube, connecting rings 40 are arranged at the front end and the rear end of the positioning convex ring, and the two connecting rings are respectively and tightly connected in the front positioning ring groove and the rear positioning ring groove. The front end outer wall of the front connecting ring and the rear end outer wall of the rear connecting ring are respectively provided with a guide surface 41 which is obliquely arranged. The outer wall of the positioning convex ring is provided with an avoiding ring groove 42.
The during operation, the drive pivot rotates and drives the piston ball and move forward in the transfer line, and the piston ball of arranging in the liquid reserve tank constantly gets into the transfer line, and the piston ball gets into the transfer line and moves the in-process forward, and transfer line open position forms the negative pressure and inhales the transfer line with the current-carrying liquid in the liquid reserve tank in, and the current-carrying liquid moves in the transfer line along with the piston ball together. After the piston ball reaches the positioning convex ring position, the pushing plug extending outwards abuts against the positioning convex ring, the pushing plug moves inwards, the connecting rod is driven to rotate, the connecting rod drives the push rod to move towards the direction away from the pull rope, the clamping block is separated from the pull rope, friction between the pull rope and the pull rope through hole is small at the moment, along with continuous rotation of the driving rotating shaft, the pull rope continues to move forwards, the piston ball at the positioning convex ring position keeps still, the pull rope moves in the pull rope through hole in the piston ball, the piston ball at the rear side continues to be pulled forwards, the liquid outlet is close to the rear side of the positioning convex ring, the distance between the piston ball at the positioning convex ring position and a piston ball behind the piston ball is gradually reduced, the carrier fluid is squeezed out of the liquid outlet, when the surface of a rear piston ball is attached to a positioning groove of a front piston ball, the pressing rod is pushed forwards, the driving surface on the pressing rod pushes the pushing plug to move towards the direction close to the pull rope, so that the clamping block clamps the pull rope, and along with continuous increase of tension, the piston ball attached to the positioning convex ring is pulled away from the position, and the clamping block moves towards the pull rope, and the clamping block is driven by the pull rope to move along with the pull rope. At the moment, the latter piston ball is abutted to the positioning convex ring again, and the process is repeated, so that the carrier fluid is continuously discharged from the fluid outlet. And residual carrier fluid between two adjacent piston balls flows back to the liquid storage tank. The pump achieves the effect of a peristaltic pump when in work, but the pump pipe cannot be extruded and deformed, is not easy to damage, avoids the phenomenon of damage and leakage, and has long service life and good infusion effect.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (10)
1. A pump structure for a flow injection analyzer is characterized by comprising a liquid storage tank, a liquid conveying pipe, a driving rotating shaft and a transmission cable, wherein the liquid conveying pipe is arranged in a roundabout mode, two ends of the liquid conveying pipe are communicated with the liquid storage tank, the transmission cable comprises a pull rope and a plurality of piston balls, pull rope through holes are formed in the piston balls, the pull rope penetrates through the pull rope through holes to connect the piston balls in series, the transmission cable is connected end to end, the transmission cable penetrates through the liquid conveying pipe and is wound on the driving rotating shaft, the driving rotating shaft is connected with a driving motor in a transmission mode, the piston balls are matched with the liquid conveying pipe, the driving rotating shaft rotates to drive the piston balls to move forwards in the liquid conveying pipe, liquid outlets are formed in the liquid conveying pipe, a deformable positioning convex ring is installed on the front side of the liquid outlets in the inner wall of the liquid conveying pipe, a plurality of pushing plugs are installed in the piston balls, the end portions of the pushing plugs extend out of the front side surfaces of the piston balls and can abut against the positioning convex rings, return springs are connected between the piston balls, connecting rods are correspondingly hinged in the piston balls, one ends of the connecting rods are hinged to the pushing plugs, the other ends of the connecting rods are hinged to push rods, the push rods can be slidably installed in the piston balls, the push rods are connected with clamping blocks through linkage springs, and clamped on the pull rope; the rear side surface of the piston ball is provided with a positioning groove, the clamping block is provided with a wedge block, the wedge block is provided with a pushing surface which is obliquely arranged, the bottom surface of the positioning groove is provided with a plurality of pressing rods which are arranged in one-to-one correspondence with the wedge block, the front end of each pressing rod is provided with a driving surface which is obliquely arranged, the driving surface is attached to the pushing surface, the rear end of each pressing rod extends backwards to form the bottom surface of the positioning groove, and a reset spring is connected between each pressing rod and the piston ball.
2. The pump structure of claim 1, wherein the infusion tube comprises a front tube and a rear tube, the positioning protrusion is disposed at a connection position between the front tube and the rear tube, an outer ring notch is disposed at a connection position between the front tube and the rear tube on an outer wall of the front tube, an inner ring notch is disposed at a connection position between the rear tube and the front tube on an inner wall of the rear tube, the outer ring notch of the front tube is sleeved with the inner ring notch of the rear tube, the inner ring notch of the rear tube is tightly fixed with the positioning ring, a rear positioning ring groove is disposed on an outer wall of a front end of the positioning ring, a front positioning ring groove is disposed on an outer wall of a rear end of the outer ring notch of the front tube, and the front and rear ends of the positioning protrusion are respectively provided with the connecting rings, and the two connecting rings are respectively tightly connected in the front positioning ring groove and the rear positioning ring groove.
3. The pump structure for a flow injection analyzer of claim 1, wherein the positioning bead has an escape ring groove on its outer wall.
4. The pump structure for a flow injection analyzer of claim 1, wherein the inner wall of the positioning bead includes a spherical ring segment and an angled segment, the spherical ring segment mating with the piston ball.
5. The pump structure for a flow injection analyzer of claim 1, wherein a positioning spring is installed between the plunger and the plunger ball.
6. A pump arrangement according to any one of claims 1 to 5, wherein the outer surface of the piston ball is provided with a buffer seal.
7. The pump structure for a flow injection analyzer according to any one of claims 1 to 5, wherein a mounting cavity is provided in the piston ball, the push rod, the clamp block, the connecting rod and the push plug are disposed in the mounting cavity, and a sealing block for sealing the mounting cavity is fixedly connected to the surface of the piston ball.
8. The pump structure for flow injection analyzer as claimed in any one of claims 1 to 5, wherein the infusion tube has a liquid inlet at one end, the piston ball enters the infusion tube from the liquid inlet, and the liquid inlet has a bell-mouth shape.
9. The pump structure for a flow injection analyzer according to any one of claims 1 to 5, wherein the push rod has an "I" shape, and the connecting rod is connected to the push rod at a position near the middle thereof.
10. The pump structure for a flow injection analyzer according to any one of claims 1 to 5, wherein a seal ring is installed in the through hole of the pulling rope near both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876397.3A CN110780084B (en) | 2019-09-17 | 2019-09-17 | Pump structure for flow injection analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876397.3A CN110780084B (en) | 2019-09-17 | 2019-09-17 | Pump structure for flow injection analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110780084A CN110780084A (en) | 2020-02-11 |
| CN110780084B true CN110780084B (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910876397.3A Active CN110780084B (en) | 2019-09-17 | 2019-09-17 | Pump structure for flow injection analyzer |
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| CN (1) | CN110780084B (en) |
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| CN109798240A (en) * | 2019-03-15 | 2019-05-24 | 重庆金山医疗器械有限公司 | A kind of Wriggling Pump Head |
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| US7815612B2 (en) * | 2000-05-11 | 2010-10-19 | Zevex, Inc. | Apparatus and method for preventing free flow in an infusion line |
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| CN101074924A (en) * | 2007-05-16 | 2007-11-21 | 洪陵成 | Method for fastly analyzing chemical oxygen demand by high-pressure flowing injection |
| CN101994685A (en) * | 2010-06-13 | 2011-03-30 | 深圳市康立高科技有限公司 | Peristaltic pump and manufacturing method thereof |
| CN203249914U (en) * | 2013-06-04 | 2013-10-23 | 杭州浩通仪器仪表有限公司 | Injection pump for water quality mercury online analyzer |
| CN205103265U (en) * | 2015-11-26 | 2016-03-23 | 北京宝德仪器有限公司 | Full -automatic flow injection analysis appearance of integral net accuse |
| CN107725343A (en) * | 2017-11-09 | 2018-02-23 | 四川君汇科技有限公司 | Combined type peristaltic pump and integrated positioning installation method |
| CN208831210U (en) * | 2018-09-15 | 2019-05-07 | 北京宝德仪器有限公司 | Peristaltic pump |
| CN109798240A (en) * | 2019-03-15 | 2019-05-24 | 重庆金山医疗器械有限公司 | A kind of Wriggling Pump Head |
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