Micro-liquid pipettor for petrochemical laboratory

Abstract

The utility model belongs to the technical field of experimental equipment, and particularly relates to a micro-liquid pipettor for a petrochemical laboratory, which comprises a base, a lifting device is mounted at one end, close to the back, of the middle of the top surface of the base, a clamping device is mounted in the middle of the front surface of the lifting device, and a pipetting device is mounted in the middle of the clamping device. The pipetting device comprises a liquid extraction and storage structure and a sealed extraction structure, the sealed extraction structure is mounted inside and at the top end of the liquid extraction and storage structure, the sealed extraction structure comprises a sealing cover, a sealing ring is mounted at the top end inside the sealing cover, an adjusting rod is mounted in the middle of the top surface of the sealing cover, a connecting block is mounted at the bottom end of the adjusting rod, and the connecting block is connected with the sealing cover. And the outer surface of the connecting block is connected with a sealing plug. According to the micro-liquid pipettor for the petrochemical engineering laboratory, the sealing performance of the liquid pumping cylinder is guaranteed through the sealing cover and the sealing ring, the liquid pumping cylinder is convenient to clean, and the liquid pumping amount is convenient to observe through the observation window in the liquid pumping and pipetting process.

Description

TECHNICAL FIELD

[0001] The utility model relates to experimental equipment technical field, concretely is a trace liquid pipettor for petrochemical laboratory. BACKGROUND

[0002] Petroleum chemical industry, abbreviated as petrochemical industry. Generally refers to the chemical industry with petroleum and natural gas as raw materials. The scope is very wide, and the products are many. Crude oil is cracked (cracked), reformed and separated to provide basic raw materials, such as ethylene, propylene, butene, butadiene, benzene, toluene, xylene, naphthalene, etc.

[0003] The petroleum chemical industry usually needs to be tested in the laboratory, and the trace liquid pipettor needs to be used for pipetting in the experimental process. However, the cleanliness of the pipettor is quite high during the experimental operation process, so the pipettor needs to replace a new liquid suction head after transferring liquid each time, which is high in cost and inconvenient to operate, resulting in the increase of the cost of the whole pipetting operation. However, the existing technology adopts the way of blowing the liquid out of the capillary tube, which is obviously easy to contaminate the liquid, resulting in invalid liquid.

[0004] A trace pipettor disclosed in Chinese patent CN204051713U, through the shell with inner cavity, the movable core tube arranged in the inner cavity, the capillary tube for sucking liquid and the pressurizer for providing air pressure for the inner cavity, the upper end of the shell is provided with the movable hole for containing the upper end of the core tube and tightly matched with it, and the lower end is provided with the out pipe mouth for containing the capillary tube, and the out pipe mouth is tightly matched with the outer wall of the capillary tube; The core tube has a containing cavity for containing the capillary tube, and the lower end is provided with a pushing part for pushing the capillary tube out of the out pipe mouth when the upper end of the core tube is pressed, and the pipe wall of the core tube is provided with a through hole for containing the inner cavity and the air entering the containing cavity; The pressurizer is arranged on the shell. The internal air pressure is improved by the pressurizer to extrude the liquid, which can effectively prevent the liquid from being contaminated; the pushing part can push the capillary tube in the core tube to the outside, and a new capillary tube port can be formed after cutting the used part.

[0005] However, the trace pipettor used in the prior art needs to ensure the sealing of the pipettor during use, so as to prevent the liquid from leaking during the pipetting process, and the liquid suction amount needs to be accurately controlled.

[0006] Therefore, we urgently need to provide a trace liquid pipettor for petrochemical laboratory. Utility model content

[0007] The utility model discloses a micro liquid pipette for petroleum chemical laboratory, which is used to solve the problem of ensuring the sealing of the pipette during use to prevent liquid leakage during pipetting and accurately controlling the amount of liquid suction.

[0008] To achieve the above object, the utility model provides the following technical scheme: a micro liquid pipette for petroleum chemical laboratory, comprising a base, a lifting device is installed on the top surface of the base, a clamping device is installed on the front surface of the lifting device, and a pipetting device is installed on the clamping device.

[0009] The pipetting device comprises a liquid extraction and storage structure and a sealed extraction structure, and the sealed extraction structure is installed inside and at the top end of the liquid extraction and storage structure.

[0010] The sealed extraction structure comprises a sealing cover, a sealing ring is installed at the top end of the sealing cover, an adjusting rod is installed on the top surface of the sealing cover, a connecting block is installed at the bottom end of the adjusting rod, and a sealing plug is connected to the outer surface of the connecting block.

[0011] Preferably, the liquid extraction and storage structure comprises a liquid extraction cylinder, a liquid extraction pipe is fixedly installed at the bottom end of the liquid extraction cylinder, and an observation window is fixedly installed on the outer surface of the liquid extraction cylinder.

[0012] Preferably, the inside of the sealing cover is threadedly connected to the top end of the liquid extraction cylinder, the outer surface of the sealing ring is sealingly abutted to the top end of the liquid extraction cylinder, the outer surface of the adjusting rod is threadedly connected to the middle part of the sealing cover, the outer surface of the sealing plug is sealingly and slidingly connected to the inner wall of the liquid extraction cylinder, and the outer surface of the connecting block is rotatably connected to the inner wall of the groove formed in the middle part of the top surface of the sealing plug. The observation window is made of transparent material, the sealing cover and the liquid extraction cylinder are detachably connected, the inside of the liquid extraction cylinder can be easily cleaned, and the sealing ring can effectively ensure the sealing.

[0013] Preferably, the lifting device comprises a lifting frame, an asynchronous motor is installed at the top end of the lifting frame, a lifting piece is connected to the output end of the asynchronous motor, and a lifting plate is installed on the middle part of the outer surface of the lifting piece.

[0014] Preferably, the bottom end of the lifting frame is fixedly connected to the middle part of the top surface of the base, the outer surface of the middle part of the back surface of the lifting plate is slidingly connected to the inner wall of the limiting groove formed in the middle part of the lifting frame, and the bottom end of the lifting piece is connected to the inside of the installation groove formed in the middle part of the back surface of the base through a bearing.

[0015] Preferably, the clamping device comprises a fixing base, an adjusting piece is arranged at the middle of the top end of the fixing base, a moving block is connected to the middle of the outer surface of the adjusting piece, and a clamping rod is arranged at the middle of the front surface of the moving block.

[0016] Preferably, the bottom of the fixing base is fixedly connected with the top of the front surface of the lifting plate, the bottom of the moving block is slidably connected with the top of the front surface of the lifting plate through a convex sliding groove, and an arc-shaped clamping groove is arranged on one side of the clamping rod.

[0017] Compared with the prior art, the petroleum chemical laboratory micro-liquid pipette has the following beneficial effects:

[0018] 1. The petroleum chemical laboratory micro-liquid pipette is characterized in that the sealing cover and the sealing ring are used to ensure the sealing property of the liquid suction cylinder, the liquid suction cylinder is convenient to clean, and the liquid suction amount can be observed through the observation window during the liquid suction and pipetting process.

[0019] 2. The petroleum chemical laboratory micro-liquid pipette is characterized in that the lifting device and the clamping device are used to drive the lifting piece through the asynchronous motor, so that the lifting plate is lifted, and the adjusting piece is used to drive the two moving blocks and the clamping rod in the same group to clamp, so that the stability of the pipetting device after being placed is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an overall structure schematic view of the utility model;

[0021] Figure 2 It is an internal structure enlarged view of the lifting device of the utility model;

[0022] Figure 3 It is an enlarged view of the clamping device of the utility model;

[0023] Figure 4 It is an internal structure enlarged view of the clamping device of the utility model;

[0024] Figure 5 It is an enlarged view of the pipetting device of the utility model;

[0025] Figure 6 It is an internal structure cross-section enlarged view of the pipetting device of the utility model.

[0026] In the figure: 1, base; 101, lifting frame; 102, asynchronous motor; 103, lifting piece; 104, lifting plate; 201, fixed seat; 202, adjusting piece; 203, moving block; 204, clamping rod; 301, liquid extraction cylinder; 302, liquid extraction pipe; 303, observation window; 304, sealing cover; 305, sealing ring; 306, adjusting rod; 307, connecting block; 308, sealing plug. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. EMBODIMENT

[0028] Based on the problem that the micro pipette used in the prior art needs to ensure the sealing of the pipette during use to prevent liquid from leaking during the pipetting process, and the liquid suction amount needs to be accurately controlled, please refer to Figures 1-6 , the embodiment provides a micro liquid pipette for a petrochemical laboratory, which can effectively ensure the sealing of the pipetting device, improve the stability during the pipetting process, and facilitate cleaning of the inside and observation of the pipetting amount. The micro liquid pipette for the petrochemical laboratory comprises a base 1, a lifting device is installed on the top surface of the base 1 near the back end, a clamping device is installed on the front surface of the lifting device, and a pipetting device is installed on the middle part of the clamping device.

[0029] The pipetting device comprises a liquid extraction and storage structure and a sealed extraction structure. The sealed extraction structure is installed inside and at the top end of the liquid extraction and storage structure. The sealed extraction structure comprises a sealing cover 304, a sealing ring 305 is installed at the top end inside the sealing cover 304, an adjusting rod 306 is installed on the middle part of the top surface of the sealing cover 304, a connecting block 307 is installed at the bottom end of the adjusting rod 306, and a sealing plug 308 is connected to the outer surface of the connecting block 307. The liquid extraction and storage structure comprises a liquid extraction cylinder 301, a liquid extraction pipe 302 is fixedly installed at the bottom end of the liquid extraction cylinder 301, and an observation window 303 is fixedly installed on the middle part of the outer surface of the liquid extraction cylinder 301.

[0030] The inside of the sealing cover 304 is threadedly connected to the top end of the liquid extraction cylinder 301, the outer surface of the sealing ring 305 is sealingly abutted to the top end of the liquid extraction cylinder 301, the outer surface of the adjusting rod 306 is threadedly connected to the middle part of the sealing cover 304, the outer surface of the sealing plug 308 is sealingly and slidingly connected to the inner wall of the liquid extraction cylinder 301, and the outer surface of the connecting block 307 is rotatably connected to the middle part of the top surface of the sealing plug 308.

[0031] By the setting of the pipetting device, the sealing of the suction cylinder 301 is ensured by the sealing cover 304 and the sealing ring 305, and the suction cylinder 301 is convenient to clean, and the amount of suction is convenient to observe by the observation window 303 during the suction pipetting process.

[0032] When the suction is performed by the pipetting device, the length of the adjusting rod 306 at the bottom of the sealing cover 304 is adjusted by the threaded connection between the outer surface of the adjusting rod 306 and the threaded hole in the middle of the sealing cover 304, so that the length of the adjusting rod 306 at the bottom of the sealing cover 304 is adjusted when the adjusting rod 306 is rotated, thereby driving the connecting block 307 and the sealing plug 308 to ascend and descend, the air in the suction cylinder 301 is pumped by the sealing plug 308, the liquid required for the experiment is pumped through the suction pipe 302, the amount of suction is observed and controlled by the observation window 303, the scale is provided on the outer surface of the suction cylinder 301, the precise control of the liquid amount is facilitated, the detachable connection of the sealing cover 304 with the top end of the suction cylinder 301, and the sealing of the suction cylinder 301 by the sealing ring 305 ensure the sealing of the suction cylinder 301 during use, and the detachable sealing cover 304 facilitates the cleaning of the inside of the suction cylinder 301. Embodiment

[0033] Based on the implementation of the first embodiment, the prior art still has the problem that the height of the pipetting device is not convenient to adjust and place, and the stability needs to be ensured after placement to prevent the pipetting device from tilting and leaking, please refer to Figures 1-4 , the embodiment provides a micro liquid pipette for petroleum chemical laboratory, which can effectively adjust the height of the pipetting device placed, solve the problem that the pipetting device is unstable during placement and is easy to tilt and cause liquid leakage, the micro liquid pipette for petroleum chemical laboratory comprises a lifting device comprising a lifting frame 101, an asynchronous motor 102 is installed at the top end of the lifting frame 101, and a lifting piece 103 is connected to the output end of the asynchronous motor 102, and a lifting plate 104 is installed at the middle of the outer surface of the lifting piece 103.

[0034] The clamping device comprises a fixed seat 201, an adjusting piece 202 is installed at the middle of the top end of the fixed seat 201, a moving block 203 is connected to the middle of the outer surface of the adjusting piece 202, and a clamping rod 204 is installed at the middle of the front surface of the moving block 203. The bottom of the fixed seat 201 is fixedly connected with the top of the front surface of the lifting plate 104, the bottom of the outer surface of the moving block 203 is slidably connected with the inner wall of the convex sliding groove formed at the top of the front surface of the lifting plate 104, and an arc-shaped clamping groove is formed in one side of the clamping rod 204.

[0035] The lifting device and the clamping device are arranged, the lifting member 103 is driven by the asynchronous motor 102 to drive the lifting plate 104 to lift, and the two moving blocks 203 and the clamping rod 204 in the same group are driven by the adjusting member 202 to clamp, so that the stability of the pipette device after placement is ensured.

[0036] During the use of the pipette device, the liquid used in the experiment may not be used up at one time, or after the pipetting is completed, the pipette device needs to be temporarily placed, so the height needs to be adjusted to facilitate the placement of the pipette device, and the stability of the pipette device during placement needs to be ensured. The lifting member 103 is driven by the asynchronous motor 102 to drive, the threaded rod at the output end of the asynchronous motor 102 is rotated, the threaded rod is screwed with the threaded cylinder, so that the threaded cylinder drives the lifting plate 104 to slide in the limiting groove in the middle of the lifting frame 101, thereby adjusting the height of the lifting plate 104. The moving block 203 is moved by rotating the adjusting member 202, and the bidirectional screw rod is rotated. The two moving blocks 203 in the same group are screwed with the threads on the outer surface of the bidirectional screw rod, so that the two moving blocks 203 in the same group are close to or away from each other, thereby driving the two clamping rods 204 in the same group to clamp and limit the liquid suction cylinder 301. At the same time, the two clamping rods 204 in the same group are close to each other, and the anti-skid layer installed in the arc-shaped clamping groove on one side can effectively ensure the stability of the placement of the liquid suction cylinder 301, and prevent the liquid from leaking.

[0037] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

Claims

1. A micro-liquid pipette for use in a petrochemical laboratory, comprising a base (1), characterized in that: A lifting device is installed on the top surface of the base (1) near the back end, a clamping device is installed on the front center of the lifting device, and a pipetting device is installed in the center of the clamping device. The pipetting device includes a liquid extraction and storage structure and a sealed extraction structure, wherein the sealed extraction structure is installed inside and at the top of the liquid extraction and storage structure. The sealing extraction structure includes a sealing cover (304), a sealing ring (305) is installed at the top inside the sealing cover (304), an adjusting rod (306) is installed in the middle of the top surface of the sealing cover (304), a connecting block (307) is installed at the bottom of the adjusting rod (306), and a sealing plug (308) is connected to the outer surface of the connecting block (307).

2. The micro-liquid pipette for petrochemical laboratories according to claim 1, characterized in that: The liquid extraction and storage structure includes a liquid extraction cylinder (301), a liquid extraction tube (302) is fixedly installed at the bottom end of the liquid extraction cylinder (301), and an observation window (303) is fixedly installed in the middle of the outer surface of the liquid extraction cylinder (301).

3. A micro-liquid pipette for use in a petrochemical laboratory according to claim 2, characterized in that: The sealing cap (304) is threadedly connected to the top of the pumping cylinder (301), the outer surface of the sealing ring (305) is sealed and abuts against the top of the pumping cylinder (301), the outer surface of the adjusting rod (306) is threadedly connected to the middle of the sealing cap (304), the outer surface of the sealing plug (308) is slidably connected to the inner wall of the pumping cylinder (301), and the outer surface of the connecting block (307) is rotatably connected to the inner wall of the groove in the middle of the top surface of the sealing plug (308).

4. A micro-liquid pipette for use in a petrochemical laboratory according to claim 1, characterized in that: The lifting device includes a lifting frame (101), an asynchronous motor (102) is installed at the top of the lifting frame (101), a lifting component (103) is connected to the output end of the asynchronous motor (102), and a lifting plate (104) is installed in the middle of the outer surface of the lifting component (103).

5. A micro-liquid pipette for use in a petrochemical laboratory according to claim 4, characterized in that: The bottom end of the lifting frame (101) is fixedly connected to one end of the back side of the top surface of the base (1). The outer surface of the back side of the lifting plate (104) is slidably connected to the inner wall of the limiting groove in the middle of the lifting frame (101). The bottom end of the lifting component (103) is connected to the inside of the mounting groove in the middle of the back side of the top surface of the base (1) through a bearing.

6. A micro-liquid pipette for use in a petrochemical laboratory according to claim 1, characterized in that: The clamping device includes a fixed base (201), an adjusting member (202) is installed at the top center of the fixed base (201), a moving block (203) is connected to the middle of the outer surface of the adjusting member (202), and a clamping rod (204) is installed at the middle of the front side of the moving block (203).

7. A micro-liquid pipette for use in a petrochemical laboratory according to claim 6, characterized in that: The bottom of the fixed base (201) is fixedly connected to the top of one end of the front of the lifting plate (104), the outer surface of the bottom end of the moving block (203) is slidably connected to the inner wall of the convex sliding groove at one end of the top of the lifting plate (104), and an arc-shaped clamping groove is provided on one side of the clamping rod (204).

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