Micro-controllable sample introduction device

Abstract

The utility model provides a trace controllable sample introduction device, which is characterized in that an inner shell is slidably connected in an outer shell, the inner shell is connected to an execution end of a trace sample introduction power component through a connecting component, a needle cylinder is arranged at the end part of the outer shell, a core is slidably connected in the needle cylinder, and one end of the core is fixedly connected to one end of the inner shell; one end of the micro-sampling power part is rotated to drive the inner shell and the core to slide in the axial direction of the outer shell, the needle cylinder collects liquid through negative pressure of the core moving in the axial direction, and scales are arranged on the micro-sampling power part and used for observing the volume of the collected liquid or discharged liquid. According to the microscale controllable sample injection device, axial movement of the core is achieved by rotating the microscale sample injection power component, liquid collection and liquid discharge of the needle cylinder are achieved, scale marks are arranged on the shell, a worker determines the volume of the collected liquid according to the number of rotation turns and scale indications, influences of light rays, sample colors and the like are avoided, and the sample injection efficiency is improved. The sampling quality is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of micro-injection, in particular to a micro-controllable injection device. Background Art

[0002] With the development of the petroleum and chemical industries, the country is placing increasing emphasis on pollutant detection and the health of the general public. Trace pollutant detection, product quality monitoring, and trace element content control all require precise volume sampling of the sample being tested. Currently, micro-injection devices are divided into automatic and manual control. Automatic injection systems based on measuring instruments can precisely control the micro-injection volume through mechanical and electrical circuits. However, to avoid excessive costs, many existing instruments do not have automatic injection devices. Manual injection relies solely on the operator's experimental experience, and different experimenters have different injection habits. Therefore, the accuracy and repeatability of manual micro-injection cannot be guaranteed.

[0003] At present, the main difficulties in the micro-injection process are as follows: First, when the same experimenter performs micro-sampling at different times, the injection volume control of the same volume of different samples is inconsistent due to subjective reasons such as light and sample color; Second, different experimenters use the same micro-injector and cannot inject samples according to the same reading standard, which makes different experimenters have inconsistent control over the injection volume of the same volume of the same sample; Third, micro-injectors are often made of glass and alloy materials. In order to ensure the injection speed, the injection needle core can often slide axially back and forth in the glass syringe. There is no limiting mechanism in the injection and withdrawal directions, which makes it difficult for the experimenter to accurately control the injection needle handle; Fourth, due to the need for micro-injection, the injection needle core is often designed as a metal wire with an extremely fine diameter, which is easily subjected to radial force during injection, causing the injection needle core to bend and reducing the injection needle usage time.

[0004] Therefore, in order to overcome the above technical difficulties, a micro-controllable sampling device is designed to accurately and efficiently complete the manual precise sampling of trace liquids. This is very necessary for the performance evaluation of the instrument and ensuring that its measurement values ​​are accurate and reliable. Summary of the Invention

[0005] In view of this, the utility model aims to propose a micro-controllable sampling device to solve the problems in the prior art that sampling amount deviation is easily caused by subjective reasons such as light and sample color, the human factor is large, and the sampling quality is uncontrollable.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0007] A micro-controllable injection device comprises an outer shell, an inner shell, a syringe, a core and a micro-injection power component. The inner shell is slidably connected to the inner shell, and the inner shell is connected to the execution end of the micro-injection power component via a connecting component. A syringe is provided at the end of the outer shell, and the core is slidably connected to the syringe, and one end of the core is fixedly connected to one end of the inner shell. Rotating one end of the micro-injection power component can drive the inner shell and the core to slide axially along the outer shell. The syringe collects liquid through the negative pressure of the axially moving core. The micro-injection power component is provided with a scale, which is used to observe the volume of collected or discharged liquid.

[0008] Furthermore, the shell includes two shell petals arranged opposite to each other, and the cross-section of each shell petal is an arc-shaped structure. A clamping platform and a clamping slot are respectively provided at both ends of the arc-shaped structure of each shell petal, and each clamping platform is correspondingly clamped into the clamping slot to fix the relative positions of the two shell petals.

[0009] Furthermore, a positioning groove is provided in the axial direction in the shell petal, and a positioning boss is provided on the periphery of the inner shell, and the positioning boss is slidably connected to the positioning groove.

[0010] Furthermore, a semicircular positioning component is provided at one end of each shell petal, and the periphery of the syringe is fixedly installed in the semicircular positioning component.

[0011] Furthermore, a sampling needle is provided at one end of the syringe, and the sampling needle is located outside the semicircular positioning component.

[0012] Furthermore, the syringe is made of transparent material, and an observation hole is provided on the semicircular positioning component.

[0013] Furthermore, the material of the syringe is either acrylic or glass.

[0014] Furthermore, the micro-injection power component is a micrometer.

[0015] Furthermore, the micro-injection power component includes an upper shell and a rotating sleeve. The outer periphery of the rotating sleeve is rotatably connected to the outer shell and the inner ring of the upper shell through bearings. The inner ring of the rotating sleeve is provided with a thread. A screw is provided at one end of the connecting component. The outer periphery of the screw is threadedly connected to the rotating sleeve. A rotating handle is provided at one end of the rotating sleeve, and the rotating handle is located outside the upper shell.

[0016] Furthermore, a scale is provided on one end of the upper shell, and a pointer is provided on the rotating handle.

[0017] Compared with the prior art, the micro-controllable injection device described in the present invention has the following beneficial effects:

[0018] (1) The micro-controllable injection device described in the present invention realizes the axial movement of the core by rotating the micro-injection power component, thereby collecting and discharging liquid from the syringe. A scale mark is set on the outer shell, and the staff determines the volume of the collected liquid according to the number of rotations and the scale indication. The device is not affected by light, sample color, etc., thereby ensuring the sampling quality.

[0019] (2) The micro-controllable injection device described in the present invention has a syringe made of a transparent material, and an observation hole is provided on the semicircular positioning component. The material of the syringe is either acrylic or glass. The liquid level position in the syringe inside the shell and the position of the core can be observed through the observation hole, which is convenient for the staff to observe the situation inside the syringe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is a schematic structural diagram of a micro-controllable sample injection device according to an embodiment of the present utility model;

[0022] Figure 2 This is a cross-sectional schematic diagram of a micro-controllable injection device according to an embodiment of the present utility model;

[0023] Figure 3 This is a structural diagram of the cooperation between the shell petals and the semicircular positioning component described in an embodiment of the present utility model.

[0024] Description of reference numerals:

[0025] 1-outer shell; 11-shell flap; 12-card base; 13-card slot; 14-positioning slot; 15-semicircular positioning component; 16-observation hole; 2-syringe; 21-sampling needle; 3-core; 4-inner shell; 41-positioning boss; 5-connecting component; 6-microinjection power component; 61-upper shell; 62-rotating sleeve; 63-bearing; 64-screw; 65-rotating handle; 66-pointer. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] like Figure 1-Figure 3 As shown, a micro-controllable injection device includes an outer shell 1, an inner shell 4, a syringe 2, a core 3 and a micro-injection power component 6. The outer shell 1 is slidably connected to the inner shell 4, and the inner shell 4 is connected to the execution end of the micro-injection power component 6 through a connecting component 5. A syringe 2 is provided at the end of the outer shell 1, and the syringe 2 is slidably connected to the core 3, and one end of the core 3 is fixedly connected to one end of the inner shell 4. Rotating one end of the micro-injection power component 6 can drive the inner shell 4 and the core 3 to slide along the axial direction of the outer shell 1. The syringe 2 moves the core 3 axially. Negative pressure is used to collect liquid, and a scale is provided on the micro-injection power component 6. The scale is used to observe the volume of collected or discharged liquid. The connecting component 5 of this embodiment is a coupling, which connects the core 3 and the micro-injection power component 6. The axial movement of the core 3 is achieved by rotating the micro-injection power component 6, and the collection and discharge of liquid by the syringe 2 is achieved. A scale mark is set on the outer shell 1. The staff determines the volume of the collected liquid according to the number of rotations and the scale indication. It is not affected by light, sample color, etc., and the sampling quality is guaranteed.

[0031] like Figure 3As shown, the outer shell 1 includes two shell petals 11 arranged opposite to each other, and the cross-section of each shell petal 11 is an arc-shaped structure. A clamping platform 12 and a clamping groove 13 are respectively provided at both ends of the arc-shaped structure of each shell petal 11. Each clamping platform 12 is correspondingly clamped into the clamping groove 13 to fix the relative positions of the two shell petals 11, so as to facilitate the assembly and snapping of the outer shell 1. A positioning groove 14 is axially provided in the shell petal 11, and a positioning boss 41 is provided on the periphery of the inner shell 4. The positioning boss 41 is slidably connected to the positioning groove 14. The cooperation between the positioning boss 41 and the positioning groove 14 is used to prevent the inner shell 4 from rotating synchronously with the micro-injection power component 6. The sliding trajectory of the inner shell 4 is limited by the positioning groove 14 to facilitate the aspiration and discharge operations of the syringe 2.

[0032] A semicircular positioning component 15 is provided at one end of each shell petal 11, and the outer periphery of the syringe 2 is fixedly installed in the semicircular positioning component 15. A sampling needle 21 is provided at one end of the syringe 2, and the sampling needle 21 is located outside the semicircular positioning component 15. The syringe 2 is made of transparent material, and an observation hole 16 is provided on the semicircular positioning component 15. The material of the syringe 2 is either acrylic or glass. The present embodiment uses glass material. The liquid level position in the syringe 2 inside the shell 1 and the position of the core 3 can be observed through the observation hole 16, which is convenient for the staff to observe the situation inside the syringe 2.

[0033] There are multiple implementations of the microinjection power component 6:

[0034] The first embodiment of the micro-injection power component 6 is a micrometer, and the micrometer model is a three-measurement differential head micrometer 0-6.5-13-25 screw micrometer flat round head instrument with a mounting nut.

[0035] The second embodiment of the micro-injection power component 6 includes an upper shell 61 and a rotating sleeve 62. The outer periphery of the rotating sleeve 62 is rotatably connected to the outer shell 1 and the inner ring of the upper shell 61 through a bearing 63. The inner ring of the rotating sleeve 62 is provided with a thread. A screw rod 64 is provided at one end of the connecting component 5. The outer periphery of the screw rod 64 is threadedly connected to the rotating sleeve 62. A rotating handle 65 is provided at one end of the rotating sleeve 62. The rotating handle 65 is located outside the upper shell 61. A scale is provided at one end of the upper shell 61. A pointer 66 is provided on the rotating handle 65. The staff rotates the rotating handle 65 to drive the rotating sleeve 62 to rotate. The screw rod 64 is affected by the connecting component 5, the inner shell 4, the positioning boss 41 and the positioning groove 14 and does not rotate. The rotating rotating sleeve 62 drives the screw rod 64, the inner shell 4 and the core 3 to slide axially, thereby realizing negative pressure suction or discharge of the syringe 2.

[0036] By cooperating with the coupling, the micro-injection power component 6, and the syringe 2, the movement of the injection needle core 3 in the injection and withdrawal directions is limited, and the linear motion is converted into axial rotation. The injection volume is controlled by reading the scale of the micro-injection power component 6, reducing the error of the experimenter's manual control of the injection needle.

[0037] In the present invention, by converting rotation into linear motion and by the cooperation of the positioning boss 41 and the positioning groove 14, the radial force applied by the experimenter to the injection needle core 3 is reduced, preventing the injection needle core 3 from bending due to incorrect force during injection, thereby improving the efficiency of the injection needle.

[0038] 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 micro-controllable sample injection device, characterized in that: The invention comprises an outer shell (1), an inner shell (4), a syringe (2), a core (3) and a micro-injection power component (6); the inner shell (4) is slidably connected to the inner shell (4) inside the outer shell (1), and the inner shell (4) is connected to the execution end of the micro-injection power component (6) through a connecting component (5); a syringe (2) is provided at the end of the outer shell (1); the inner shell (2) is slidably connected to the core (3), and one end of the core (3) is fixedly connected to one end of the inner shell (4); rotating one end of the micro-injection power component (6) can drive the inner shell (4) and the core (3) to slide along the axial direction of the outer shell (1); the syringe (2) collects liquid under negative pressure through the axially moving core (3); and a scale is provided on the micro-injection power component (6); the scale is used to observe the volume of collected liquid or discharged liquid.

2. A micro-controllable sample injection device according to claim 1, characterized in that: The housing (1) comprises two shell lobes (11) arranged opposite to each other, the cross section of each shell lobe (11) being an arc-shaped structure, a clamping platform (12) and a clamping slot (13) being respectively provided at both ends of the arc-shaped structure of each shell lobe (11), and each clamping platform (12) being correspondingly clamped into the clamping slot (13) for fixing the relative positions of the two shell lobes (11).

3. A micro-controllable sample injection device according to claim 2, characterized in that: A positioning groove (14) is provided in the axial direction of the shell flap (11), and a positioning boss (41) is provided on the periphery of the inner shell (4), and the positioning boss (41) is slidably connected to the positioning groove (14).

4. A micro-controllable sample injection device according to claim 2, characterized in that: A semicircular positioning component (15) is provided at one end of each shell petal (11), and the periphery of the syringe (2) is fixedly mounted in the semicircular positioning component (15).

5. A micro-controllable sample injection device according to claim 4, characterized in that: A sampling needle (21) is provided at one end of the syringe (2), and the sampling needle (21) is located outside the semicircular positioning component (15).

6. A micro-controllable sample injection device according to claim 5, characterized in that: The syringe (2) is made of transparent material, and an observation hole (16) is provided on the semicircular positioning component (15).

7. A micro-controllable sample injection device according to claim 6, characterized in that: The material of the syringe (2) is either acrylic or glass.

8. The micro-controllable sample injection device according to claim 1, characterized in that: The micro-injection power component (6) is a micrometer.

9. The micro-controllable sample injection device according to claim 1, characterized in that: The micro-injection power component (6) comprises an upper shell (61) and a rotating sleeve (62). The outer periphery of the rotating sleeve (62) is respectively rotatably sleeved to the outer shell (1) and the inner ring of the upper shell (61) through a bearing (63). The inner ring of the rotating sleeve (62) is provided with a thread. A screw rod (64) is provided at one end of the connecting component (5). The outer periphery of the screw rod (64) is threadedly connected to the inside of the rotating sleeve (62). A rotating handle (65) is provided at one end of the rotating sleeve (62). The rotating handle (65) is located outside the upper shell (61).

10. The micro-controllable sample injection device according to claim 9, characterized in that: One end of the upper shell (61) is provided with a scale, and a pointer (66) is provided on the rotating handle (65).

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