Liquid suction device for chemical analysis

Abstract

The utility model discloses a liquid suction device for chemical analysis, which comprises a liquid suction device main body, a liquid storage bottle and a positioning plate, the positioning plate is fixedly connected to one end of the liquid suction device main body, the lower end of the liquid suction device main body is provided with a liquid storage bottle anti-leakage mounting structure, and the liquid storage bottle anti-leakage mounting structure comprises a lower funnel, a sealing gasket and a threaded pipe. The lower funnel is fixedly connected to the bottom end of the outer wall of the liquid suction device body, and a sealing gasket is fixedly installed at the lower end of the lower funnel. According to the liquid suction device for chemical analysis, the top end of a liquid storage bottle is aligned to the lower portion of a lower funnel, then a threaded ring is rotated to move upwards, the threaded ring continuously rotates upwards till staying at the threaded joint of a threaded pipe and the outer side of the lower funnel, and therefore the inner side of the threaded ring can be tightly hooped to the outer side of a sealing gasket, and the sealing effect is improved; the threaded ring is hooped at the bottom ends of the liquid storage bottle and the lower funnel, so that the sealing performance is improved, a good connecting and fixing effect is achieved, and the using effect of the liquid suction device for chemical analysis is improved.

Description

Technical field:

[0001] The utility model relates to the technical field of pipettes, in particular to a pipette for chemical analysis. Background technology:

[0002] In chemical engineering, chemical analysis laboratories and other analytical testing technology application fields, it is often necessary to use a pipette to quantitatively transfer liquids for analysis and testing, and an auxiliary pipette is needed to transfer liquids.

[0003] For example, the authorization announcement number "CN212031014U" is named a chemical analysis pipette. Although the liquid storage bottle can be quickly disassembled and installed through the coordinated use of knobs, rotating shafts, worms, worm gears, bidirectional screws, nuts, connecting rods, blocks, and slots, the structural design is reasonable, the operation is simple, and it is easy to use. However, the existing chemical analysis pipette adopts a liquid storage bottle structure that absorbs the chemical reagent liquid into the pipette. The liquid storage bottle adopts a structure in which the blocks on both sides are fixed and clamped under the push of the nut. However, the bottle mouth position of the liquid storage bottle and the funnel part at the lower end of the pipette body do not have a very good and dense connection structure. This causes the chemical analysis reagent to be sucked into the pipette. When the pipette is taken away and moved, it is easy to leak at the connection between the bottle mouth of the liquid storage bottle and the pipette, which not only causes waste of chemical materials, but also the chemical reagent liquid will contaminate the bottle body of the liquid storage bottle, thereby affecting the use effect of the chemical analysis pipette.

[0004] At the same time, the existing chemical analysis pipette adopts the method of adjusting and increasing the direction of liquid suction by rotating the end pipette as needed. However, the end pipette of the pipette is a hard tube. Even if the direction can be adjusted, it is not convenient to bend and twist, which makes it inconvenient to suck chemical reagent liquids from more positions. However, after being replaced with a soft tube, bending and twisting during liquid suction can be achieved, but the shape of the soft tube is difficult to determine, and it is difficult for the operator to manually operate it, which directly reduces the convenience of the liquid suction work of the chemical analysis pipette. Utility model content:

[0005] The purpose of the utility model is to provide a liquid pipette for chemical analysis, so as to solve the shortcomings of the existing liquid pipette, such as poor use effect and inconvenience in liquid pipetting.

[0006] The utility model is implemented by the following technical scheme: a pipette for chemical analysis, comprising a pipette main body, a liquid storage bottle and a positioning plate, the positioning plate being fixedly connected to one end of the pipette main body, the lower end of the pipette main body being provided with a liquid storage bottle leak-proof mounting structure, the liquid storage bottle leak-proof mounting structure comprising a lower funnel, a sealing gasket and a threaded tube, the lower funnel being fixedly connected to the bottom end of the outer wall of the pipette main body, the lower end of the lower funnel being fixedly mounted with a sealing gasket, the threaded tube being fixedly connected to the top end of the liquid storage bottle, the outer side thread of the threaded tube being sleeved with a threaded ring, the inner top end of the threaded ring being connected to the outer side thread of the lower funnel.

[0007] Preferably, the bottom end of the lower funnel is connected to the top end of the liquid storage bottle, the inner side of the threaded ring is movably connected to the outer wall of the sealing gasket, and the top end of the lower funnel is connected to the interior of the pipette body.

[0008] Preferably, a liquid storage bottle positioning clamping structure is provided at the lower end of the outer wall of the liquid aspirator body;

[0009] The liquid storage bottle positioning and clamping structure includes a rotating rod, a connecting piece and a slot;

[0010] The two rotating rods are rotatably connected to the lower end of the outer wall of the liquid pipette body through bearings, and two support plates are fixedly installed at the bottom ends of the two rotating rods. The two connecting pieces are fixedly installed on the side walls of the liquid storage bottle. The two slots are fixedly opened on one side of the outer wall of the connecting piece. The inner sides of the two slots are movably connected to the rotating rods, and the top of the support plate is movably connected to the bottom of the connecting piece.

[0011] Preferably, a liquid suction structure is provided on the outer side of the positioning plate;

[0012] The liquid suction pulling structure of the liquid pipette includes a grip groove, a slide rod and a closing plate;

[0013] The gripping groove is fixedly mounted on the rear side of the positioning plate, and two limiting columns are fixedly mounted on both ends of the inner side of the gripping groove. The outer sides of the two limiting columns are slidably connected with a pull plate. The sliding rod is slidably connected to the inside of the liquid absorbent body, and the end of the sliding rod is fixedly connected to the pull plate. The other end of the sliding rod is fixedly mounted with a closing plate, and the outer side of the sliding rod is movably sleeved with a spring.

[0014] Preferably, the closing plate is slidably connected to the interior of the pipette body, one side of the spring is movably connected to the closing plate, and the other side of the spring is movably connected to the inner side of the positioning plate.

[0015] Preferably, the end of the pipette body is fixedly connected to a leak-proof layer, the end of the pipette body is fixedly installed with a pipette tube, the end of the pipette tube is fixedly connected to a telescopic hose, and the other end of the pipette tube is arranged opposite to the top of the lower funnel.

[0016] Preferably, a manual pulling hose liquid suction structure is provided above the liquid aspirator body;

[0017] The manual traction hose liquid suction structure includes a protrusion, a traction ring and a pulley;

[0018] The pulley is rotatably mounted above the outer wall of the liquid absorbent body, the protrusion is fixedly mounted on the top of the outer wall of the gripping groove, a through hole is fixedly opened on the inner side of the protrusion, a pull rope is movably connected to the inner side of the through hole, the traction ring is fixedly connected to the end of the pull rope, and the other end of the pull rope is fixedly connected to the mounting block.

[0019] Preferably, the mounting block is fixedly connected to the outer wall of the telescopic hose, and the pull rope is rotatably connected to the outer side of the pulley.

[0020] Advantages of this utility model:

[0021] 1. The utility model first aligns the top of the liquid storage bottle with the bottom of the lower funnel, then rotates the threaded ring to move upward, and the threaded ring continuously rotates upward until it stops at the intersection of the threads of the threaded tube and the outer side of the lower funnel. In this way, the inner side of the threaded ring will be tightened to the outer side of the sealing gasket to improve the sealing effect. The threaded ring is tightened to the bottom ends of the liquid storage bottle and the lower funnel, thereby improving the sealing performance and having a better connection and fixing effect, thereby improving the use effect of the pipette for chemical analysis.

[0022] 2. First, when the operator holds the grip groove tightly, his fingers can be inserted into the inner side of the traction ring. When the traction ring is pulled, the pull rope will generate a backward pulling force. At this time, the end telescopic hose will be lifted up a certain distance under the action of the backward pulling force. After loosening the traction ring, the telescopic hose will be stretched downward a certain distance under the action of gravity. The traction ring is used to drive the pull rope to adjust the length of the end telescopic hose, making the operation and use of the chemical analysis pipette more convenient. Description of the drawings:

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of a pipette for chemical analysis according to an embodiment of the present utility model;

[0025] Figure 2 A chemical analysis pipette according to an embodiment of the present invention Figure 1 Middle front cross-sectional structural diagram;

[0026] Figure 3 A chemical analysis pipette according to an embodiment of the present invention Figure 1 The schematic diagram of the structure is shown in the side view on the middle right side;

[0027] Figure 4 A chemical analysis pipette according to an embodiment of the present invention Figure 2 Schematic diagram of the cross-sectional structure of part A in the middle.

[0028] Figure 5 A chemical analysis pipette according to an embodiment of the present invention Figure 2 Schematic diagram of the cross-sectional structure of part B in the middle;

[0029] Figure 6 A chemical analysis pipette according to an embodiment of the present invention Figure 2 Schematic diagram of the cross-sectional structure of the middle C part.

[0030] In the figure: 1. Liquid pipette main body, 2. Liquid storage bottle, 3. Positioning plate, 4. Liquid storage bottle positioning clamping structure, 41. Rotating rod, 42. Connecting piece, 43. Slot, 44. Support plate, 5. Liquid storage bottle leak-proof mounting structure, 51. Lower funnel, 52. Sealing gasket, 53. Threaded tube, 54. Threaded ring, 6. Liquid pipette pulling and absorbing structure, 61. Grip groove, 62. Limiting column, 63. Pull plate, 64. Slide rod, 65. Spring, 66. Closing plate, 7. Manual traction hose absorbing structure, 71. Bump, 72. Through hole, 73. Pull ring, 74. Pull rope, 75. Pulley, 76. Mounting block, 81. Liquid pipette, 82. Leak-proof layer, 83. Telescopic hose Specific implementation method:

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-6, a pipette for chemical analysis, comprising a pipette body 1, a liquid storage bottle 2 and a positioning plate 3, the positioning plate 3 is fixedly connected to one end of the pipette body 1, the lower end of the pipette body 1 is provided with a liquid storage bottle leak-proof mounting structure 5, the liquid storage bottle leak-proof mounting structure 5 comprises a lower funnel 51, a sealing gasket 52 and a threaded tube 53, the lower funnel 51 is fixedly connected to the bottom end of the outer wall of the pipette body 1, the lower end of the lower funnel 51 is fixedly mounted with a sealing gasket 52, the sealing gasket 52 is made of natural rubber material, the natural rubber material has the characteristics of good corrosion resistance and sealing performance, the threaded tube 53 is fixedly connected to the top of the liquid storage bottle 2, the outer thread of the threaded tube 53 is threaded with a threaded ring 54, the threaded ring 5 The screw ring 54 can be rotated and screwed on the outside of the threaded tube 53, and the inner top of the threaded ring 54 is connected to the outer thread of the lower funnel 51. The bottom end of the lower funnel 51 is connected to the top of the liquid storage bottle 2. When the liquid storage bottle 2 needs to be installed or removed, the top of the liquid storage bottle 2 is aligned with the bottom of the lower funnel 51, and then the threaded ring 54 is rotated to move upward. The threaded ring 54 is continuously rotated upward until it stops at the intersection of the threads of the threaded tube 53 and the outer side of the lower funnel 51. In this way, the inner side of the threaded ring 54 will be tightened to the outer side of the sealing gasket 52 to improve the sealing effect. The inner side of the threaded ring 54 is movably connected to the outer wall of the sealing gasket 52, and the top of the lower funnel 51 is connected to the interior of the aspirator body 1.

[0033] The sealing gasket 52 is made of natural rubber material, which has the characteristics of corrosion resistance and good sealing performance. The threaded ring 54 can be rotated and twisted on the outside of the threaded tube 53. When the liquid storage bottle 2 needs to be installed or removed, the top of the liquid storage bottle 2 is aligned with the bottom of the lower funnel 51, and then the threaded ring 54 is rotated to move upward. The threaded ring 54 continues to rotate upward until it stops at the threaded intersection of the threaded tube 53 and the outside of the lower funnel 51. In this way, the inner side of the threaded ring 54 will be tightened to the outside of the sealing gasket 52 to improve the sealing effect. The threaded ring is tightened to the bottom ends of the liquid storage bottle 2 and the lower funnel 51, which improves the sealing performance and has a better connection and fixing effect, thereby improving the use effect of the chemical analysis pipette.

[0034] The two ends of the support plate 44 are movably connected to the bottom of the connecting piece 42.

[0035] See also Figure 1-6 The outer side of the positioning plate 3 is provided with a liquid suction device pulling liquid suction structure 6, and the liquid suction device pulling liquid suction structure 6 includes a gripping groove 61, a sliding rod 64 and a closing plate 66. The gripping groove 61 is fixedly installed on the rear side of the positioning plate 3, and the inner opening size of the gripping groove 61 is consistent with the size of a person's hand, which is convenient for holding and grasping. Two limiting columns 62 are fixedly installed on the inner ends of the gripping groove 61, and the outer sides of the two limiting columns 62 are slidably connected with a pulling plate 63. The pulling plate 63 can slide left and right under the restriction of the limiting columns 62, and the sliding rod 64 is slidably connected to the inside of the liquid suction device body 1, and the end of the sliding rod 64 is fixedly connected to the pulling plate 63. The operator grips the gripping groove 61 with his fingers to hook the pulling plate 63 to slide backward, and the pulling plate 63 will drive the sliding rod 64 to slide outward, and the sliding rod 64 can pull the closing plate 66 at the other end, and the closing plate 66 will squeeze the spring 65 to retract;

[0036] The closing plate 66 is made of rubber material. When the closing plate 66 slides inside the main body 1 of the pipette, the liquid at the end pipette 81 will be sucked in by air pressure. The other end of the slide rod 64 is fixedly installed with the closing plate 66. The outer side of the slide rod 64 is movably sleeved with a spring 65. When the operator releases the pull plate 63 with his fingers, the spring 65 will reset and use the elastic force to send the slide rod 64 to its original position. The closing plate 66 is slidably connected to the inside of the main body 1 of the pipette. One side of the spring 65 is movably connected to the closing plate 66, and the other side of the spring 65 is movably connected to the inner side of the positioning plate 3.

[0037] See also Figure 1-6The end of the pipette body 1 is fixedly connected with a leak-proof layer 82, and the leak-proof layer 82 is made of silicone material with good sealing performance and not easy to leak. The end of the pipette body 1 is fixedly installed with a pipette 81, and the pipette 81 is used to absorb chemical liquids. A one-way valve is provided at the pipette 81. After the liquid is absorbed, the one-way valve can control the liquid entering the inside of the pipette body 1 to not flow back and discharge. The one-way valve belongs to the existing technology that is mature at this stage, so it has a structure for omission. The end of the pipette 81 is fixedly connected with a telescopic hose 83, which is made of soft and deformable plastic material. The other end of the pipette 81 is arranged opposite to the top of the lower funnel 51.

[0038] A manual traction hose liquid suction structure 7 is provided above the liquid pipette body 1. The manual traction hose liquid suction structure 7 includes a protrusion 71, a traction ring 73 and a pulley 75. The pulley 75 is rotatably mounted on the outer wall of the liquid pipette body 1. The pulley 75 is convenient for guiding the pull rope 74 to be pulled. The protrusion 71 is fixedly mounted on the top of the outer wall of the grip groove 61. When the operator grips the grip groove 61, the fingers can be inserted into the inner side of the traction ring 73. When the traction ring 73 is pulled, the pull rope 74 will generate a backward pulling force. At this time, the end telescopic hose 83 will be lifted up a certain distance under the action of the backward pulling force.

[0039] After the traction ring 73 is loosened, the telescopic hose 83 will stretch downward a certain distance under the action of gravity, thereby controlling the telescopic hose 83 to more accurately absorb the chemical reagent liquid. A through hole 72 is fixedly opened on the inner side of the protrusion 71. A pull rope 74 is movably connected to the inner side of the through hole 72. The traction ring 73 is fixedly connected to the end of the pull rope 74. The other end of the pull rope 74 is fixedly connected to a mounting block 76. The mounting block 76 is used to connect the pull rope 74 and the telescopic hose 83. The mounting block 76 is fixedly connected to the outer wall of the telescopic hose 83. The pull rope 74 is rotatably connected to the outer side of the pulley 75.

[0040] The pulley 75 facilitates guiding the pulling of the pull rope 74, and the protrusion 71 is fixedly mounted on the top of the outer wall of the grip groove 61. When the operator grips the grip groove 61, his fingers can be inserted into the inner side of the traction ring 73. When the traction ring 73 is pulled, the pull rope 74 will generate a backward pulling force. At this time, the end telescopic hose 83 will be lifted up a certain distance under the action of the backward pulling force. After loosening the traction ring 73, the telescopic hose 83 will be stretched downward a certain distance under the action of gravity, so as to control the telescopic hose 83 to absorb the chemical reagent liquid more accurately. The traction ring 73 is used to drive the pull rope 74 to adjust the length of the end telescopic hose 83, making the operation and use of the chemical analysis pipette more convenient.

[0041] Working principle:

[0042] When performing chemical analysis operations in a chemical reagent laboratory, use a chemical analysis pipette to absorb chemical reagent liquids:

[0043] The sealing connection structure of the liquid storage bottle of the chemical analysis pipette:

[0044] The sealing gasket 52 is made of natural rubber material, which has the characteristics of good corrosion resistance and sealing performance. The threaded ring 54 can be rotated and twisted on the outside of the threaded tube 53. When the liquid storage bottle 2 needs to be installed or removed, the top of the liquid storage bottle 2 is aligned with the bottom of the lower funnel 51, and then the threaded ring 54 is rotated to move upward. The threaded ring 54 continues to rotate upward until it stops at the intersection of the threads of the threaded tube 53 and the outside of the lower funnel 51. In this way, the inner side of the threaded ring 54 will be tightened against the outer side of the sealing gasket 52 to improve the sealing effect.

[0045] After the liquid storage bottle 2 is installed, the connecting pieces 42 on both sides are connected to the positions of the rotating rods 41 correspondingly, and the rotating rods 41 are sequentially inserted into the slots 43 on the outer sides of the connecting pieces 42. At this time, the rotating rods 41 are rotated to a 90-degree angle, and the rotating rods 41 drive the lower end support plates 44 to rotate horizontally and press against the bottom of the connecting pieces 42. In this way, the rotating rods 41 on both sides use the support plates 44 to lift the liquid storage bottle 2, thereby improving the installation stability.

[0046] The pipette structure for chemical analysis:

[0047] When the operator releases the pull plate 63 with his fingers, the spring 65 will reset and use the elastic force to send the slide bar 64 to its original position;

[0048] The pipette end hose traction and lifting structure of the pipette for chemical analysis:

[0049] The pulley 75 facilitates guiding the pulling of the pull rope 74, and the protrusion 71 is fixedly mounted on the top of the outer wall of the grip groove 61. When the operator grips the grip groove 61, his fingers can be inserted into the inner side of the traction ring 73. When the traction ring 73 is pulled, the pull rope 74 will generate a backward pulling force. At this time, the end telescopic hose 83 will be lifted up a certain distance under the action of the backward pulling force. After loosening the traction ring 73, the telescopic hose 83 will be stretched downward a certain distance under the action of gravity, so as to control the telescopic hose 83 to more accurately absorb the chemical reagent liquid.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipette for chemical analysis, comprising a pipette body (1), a liquid storage bottle (2) and a positioning plate (3), characterized in that: The positioning plate (3) is fixedly connected to one end of the pipette body (1); the lower end of the pipette body (1) is provided with a liquid storage bottle leak-proof mounting structure (5); the liquid storage bottle leak-proof mounting structure (5) comprises a lower funnel (51), a sealing gasket (52) and a threaded tube (53); the lower funnel (51) is fixedly connected to the bottom end of the outer wall of the pipette body (1); the lower end of the lower funnel (51) is fixedly installed with a sealing gasket (52); the threaded tube (53) is fixedly connected to the top end of the liquid storage bottle (2); the outer thread of the threaded tube (53) is sleeved with a threaded ring (54); the inner top end of the threaded ring (54) is connected to the outer thread of the lower funnel (51).

2. A chemical analysis pipette according to claim 1, characterized in that: The bottom end of the lower funnel (51) is connected to the top end of the liquid storage bottle (2), the inner side of the threaded ring (54) is movably connected to the outer wall of the sealing gasket (52), and the top end of the lower funnel (51) is connected to the interior of the pipette body (1).

3. A chemical analysis pipette according to claim 1, characterized in that: The lower end of the outer wall of the liquid pipette body (1) is provided with a liquid storage bottle positioning clamping structure (4); The liquid storage bottle positioning clamping structure (4) comprises a rotating rod (41), a connecting piece (42) and a slot (43); The two rotating rods (41) are rotatably connected to the lower end of the outer wall of the liquid pipette body (1) through bearings, and two support plates (44) are fixedly installed at the bottom ends of the two rotating rods (41). The two connecting pieces (42) are fixedly installed on the side walls of the liquid storage bottle (2). The two slots (43) are fixedly opened on one side of the outer wall of the connecting piece (42), and the inner sides of the two slots (43) are movably connected to the rotating rods (41). The top of the support plate (44) is movably connected to the bottom of the connecting piece (42).

4. A chemical analysis pipette according to claim 1, characterized in that: The outer side of the positioning plate (3) is provided with a liquid suction device pulling liquid suction structure (6); The liquid suction device pulling liquid suction structure (6) comprises a grip groove (61), a slide rod (64) and a closing plate (66); The gripping groove (61) is fixedly mounted on the rear side of the positioning plate (3), two limiting columns (62) are fixedly mounted at both ends of the inner side of the gripping groove (61), and the outer sides of the two limiting columns (62) are slidably connected with a pull plate (63), and the sliding rod (64) is slidably connected to the inside of the aspirator body (1), and the end of the sliding rod (64) is fixedly connected to the pull plate (63), and the other end of the sliding rod (64) is fixedly mounted with a closing plate (66), and the outer side of the sliding rod (64) is movably sleeved with a spring (65).

5. A chemical analysis pipette according to claim 4, characterized in that: The closing plate (66) is slidably connected to the inside of the pipette body (1), one side of the spring (65) is movably connected to the closing plate (66), and the other side of the spring (65) is movably connected to the inner side of the positioning plate (3).

6. A chemical analysis pipette according to claim 1, characterized in that: The end of the aspirator body (1) is fixedly connected to a leakproof layer (82), the end of the aspirator body (1) is fixedly installed with a suction tube (81), the end of the suction tube (81) is fixedly connected to a telescopic hose (83), and the other end of the suction tube (81) is arranged opposite to the top of the lower funnel (51).

7. A chemical analysis pipette according to claim 1, characterized in that: A manual pulling hose liquid suction structure (7) is provided above the liquid suction device body (1); The manual traction hose liquid suction structure (7) comprises a protrusion (71), a traction ring (73) and a pulley (75); The pulley (75) is rotatably mounted on the outer wall of the liquid pipette body (1); the protrusion (71) is fixedly mounted on the top of the outer wall of the gripping groove (61); a through hole (72) is fixedly opened on the inner side of the protrusion (71); a pull rope (74) is movably connected to the inner side of the through hole (72); the traction ring (73) is fixedly connected to the end of the pull rope (74); and the other end of the pull rope (74) is fixedly connected to a mounting block (76).

8. A chemical analysis pipette according to claim 7, characterized in that: The mounting block (76) is fixedly connected to the outer wall of the telescopic hose (83), and the pull rope (74) is rotatably connected to the outer side of the pulley (75).

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