Sample introduction device of gas detection equipment

Abstract

The utility model discloses a sample introduction device of gas detection equipment, which comprises a bottom plate and a sample introduction needle, a mounting plate is fixedly connected onto the bottom plate, a first support plate and a first cylinder are slidably arranged on the mounting plate, and the output end of the first cylinder is fixedly connected with the lower end face of the first support plate; a deviation rectifying and clamping mechanism for clamping the sample injection needle is arranged on the first supporting plate; the deviation rectifying clamping mechanism comprises a first rotating ring, four positioning frames are arranged on the first rotating ring and evenly distributed in a circumferential array mode with the circle center of the first rotating ring as the center, clamping plates are arranged in the positioning frames in a sliding mode, one ends of the clamping plates are rotationally arranged on the first supporting plate, and annular grooves are formed in the other ends of the clamping plates. A clamping wheel is rotationally arranged in the annular groove; a second supporting plate is fixedly arranged on the first supporting plate, and a pushing mechanism for pushing a sample injection needle piston is arranged on the second supporting plate. According to the utility model, the sample injection needle can be accurately positioned, and the sample injection needles with different sizes can be clamped, so that errors caused by manual sample injection are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas detection equipment, and in particular relates to a sampling device of gas detection equipment. Background Art

[0002] A gas chromatograph is an instrument that uses chromatographic separation and detection techniques to perform qualitative and quantitative analysis on complex multi-component mixtures. Its operating principle is to use gas as a carrier gas. When a sample enters the injector, it is carried by the carrier gas into the chromatographic column. Due to the differences in adsorption coefficients between the mobile phase and the stationary phase in the chromatographic column, the components are repeatedly distributed between the two phases under the flushing of the carrier gas, resulting in their separation in the chromatographic column. A detector connected to the column then detects the components in order based on their physical and chemical properties.

[0003] In the prior art, an operator generally inserts an injection needle into the injection port of a chromatograph for injection. Different operators use different strengths, which leads to uneven injection volume. In addition, if there is a deviation in the injection angle, the needle tip of the injection needle is easily bent, which poses a certain risk to the operator. Utility Model Content

[0004] Based on the above background, the purpose of the present invention is to provide a sampling device for gas detection equipment.

[0005] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A sampling device for a gas detection device comprises a base plate and a sampling needle, wherein the base plate is arranged above the detection device and has a first through hole formed thereon, the first through hole corresponding to the sampling port of the detection device;

[0007] A mounting plate is fixedly connected to the bottom plate, a first support plate is slidably provided on the mounting plate, a first cylinder is fixedly provided on the mounting plate, and an output end of the first cylinder is fixedly connected to a lower end surface of the first support plate;

[0008] A second through hole is provided on the first support plate, and a deviation correction clamping mechanism for clamping the injection needle is provided in the second through hole;

[0009] The deviation-correcting clamping mechanism includes a first rotating ring, which is rotatably arranged in the second through hole. A positioning frame is provided on the first rotating ring, and the positioning frames are provided with four and are evenly distributed in a circular array with the center of the first rotating ring as the center. A clamping plate is slidably provided in the positioning frame, and one end of the clamping plate is rotatably provided on the first support plate. The other end of the clamping plate is provided with an annular groove, and a clamping wheel is rotatably provided in the annular groove.

[0010] The first through hole, the second through hole and the first rotating ring are coaxially arranged;

[0011] A second supporting plate is fixedly provided on the first supporting plate, and a pushing mechanism for pushing the injection needle piston is provided on the second supporting plate.

[0012] Preferably, the pushing mechanism includes a second cylinder, which is fixedly arranged on the second support plate, the output end of the second cylinder is connected to the first pushing plate, the first connecting plate is fixedly connected to the first pushing plate, and the lower end surface of the first connecting plate is fixedly connected to the second pushing plate.

[0013] Preferably, the lower end surface of the second push plate is an iron sheet, and the upper end surface of the injection needle is provided with a magnet.

[0014] Preferably, two first connecting plates are provided and symmetrically arranged at both ends of the second pushing plate, so as to better stabilize the second pushing plate.

[0015] Preferably, the bottom of the first rotating ring is fixedly connected to the second rotating ring, and the bottom of the positioning frame is connected to the top of the second rotating ring.

[0016] Preferably, the deviation-correcting clamping mechanism is provided with a fixing mechanism;

[0017] The fixing mechanism includes a second connecting plate, which is provided with two lower end surfaces of two clamping plates slidably arranged opposite to each other. The lower end of the second connecting plate facing the axis of the first rotating ring is connected to a first rubber block.

[0018] Preferably, a sliding groove is provided on the lower end surface of the clamping plate, and the upper end surface of the second connecting plate is slidably set in the sliding groove. A spring is provided in the sliding groove, and one end of the spring is fixedly connected to the sliding groove, and the other end is fixedly connected to the second connecting plate.

[0019] Preferably, a third connecting plate is provided at the lower end of the second connecting plate, the third connecting plate is slidably arranged in the second connecting plate, and a second rubber block is connected to the lower end of the third connecting plate on a side facing the axis of the first rotating ring;

[0020] The lower end surface of the second connecting plate is flush with the upper end of the injection needle, and the lower end surface of the third connecting plate is arranged above the bottom of the injection needle.

[0021] Preferably, a worm gear is fixedly connected to the upper end of the side surface of the first rotating ring, and a worm is rotatably provided on the first supporting plate, and the worm is meshingly connected to the worm gear.

[0022] Preferably, a silicone pad is provided on the side of the clamping wheel to increase the friction force when clamping the syringe.

[0023] The utility model has the following beneficial effects:

[0024] The utility model drives the positioning frame to rotate by the first rotating ring, and the clamping plate rotates around the other end under the rotation of the positioning frame, and the end with the clamping wheel moves toward the center of the circle to clamp the injection needle, and the four clamping wheels in the circular array can correct the syringe of the injection needle so that the syringe and the first rotating wheel are coaxially aligned, ensuring that the needle head and the injection port are perpendicular, the injection needle can be accurately positioned, and injection needles of different sizes can be clamped, avoiding the error of manual injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 the structures shown in these drawings without paying any creative work.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0027] Figure 2 A schematic diagram of the three-dimensional structure of the present invention from another perspective;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model from yet another perspective;

[0029] Figure 4 This is a schematic diagram of the disassembled three-dimensional structure of the deviation-correcting clamping mechanism of the present invention;

[0030] Figure 5 This is a schematic diagram of the disassembled three-dimensional structure of the fixing mechanism of the present utility model;

[0031] Figure 6 It is a schematic diagram of the disassembled three-dimensional structure of the first support plate and the first rotating ring of the present invention.

[0032] Wherein: 1. bottom plate; 11. first through hole;

[0033] 2. Mounting plate; 21. First cylinder;

[0034] 3. First support plate; 31. Second through hole;

[0035] 4. Correction clamping mechanism; 41. First rotating ring; 42. Positioning frame; 43. Clamping plate; 44. Annular groove; 45. Clamping wheel; 46. Second rotating ring; 47. Slide groove;

[0036] 5. Second support plate;

[0037] 6. Push mechanism; 61. Second cylinder; 62. First push plate; 63. First connecting plate; 64. Second push plate;

[0038] 7. Fixing mechanism; 71. Second connecting plate; 72. First rubber block; 73. Spring; 74. Third connecting plate; 75. Second rubber block;

[0039] 8. Worm gear; 81. Worm;

[0040] 9. Injection needle; 91. Magnet. DETAILED DESCRIPTION

[0041] 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.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0044] like Figure 1-6 As shown, a sampling device of a gas detection device includes a base plate 1 and a sampling needle 9. The base plate 1 is arranged above the detection device. A first through hole 11 is opened on the base plate 1. The first through hole 11 corresponds to the sampling port of the detection device.

[0045] The bottom plate 1 is fixedly connected to a mounting plate 2, a first support plate 3 is slidably provided on the mounting plate 2, a first cylinder 21 is fixedly provided on the mounting plate 2, and an output end of the first cylinder 21 is fixedly connected to the lower end surface of the first support plate 3;

[0046] A second through hole 31 is formed on the first support plate 3 , and a deviation correction clamping mechanism 4 for clamping the injection needle 9 is provided in the second through hole 31 ;

[0047] The deviation-correcting clamping mechanism 4 includes a first rotating ring 41, which is rotatably disposed in the second through hole 31. A positioning frame 42 is provided on the first rotating ring 41. Four positioning frames 42 are provided and are evenly distributed in a circular array centered on the center of the first rotating ring 41. A clamping plate 43 is slidably disposed in the positioning frame 42. One end of the clamping plate 43 is rotatably disposed on the first support plate 3. The other end of the clamping plate 43 is provided with an annular groove 44. A clamping wheel 45 is rotatably disposed in the annular groove 44.

[0048] The first through hole 11, the second through hole 31 and the first rotating ring 41 are coaxially arranged;

[0049] A second support plate 5 is fixedly provided on the first support plate 3 , and a pushing mechanism 6 for pushing the piston of the injection needle 9 is provided on the second support plate 5 .

[0050] Place the injection needle 9 in the first rotating ring 41, rotate the first rotating ring 41, and the positioning frame 42 will rotate accordingly. The clamping plate 43 rotates around the other end under the rotation of the positioning frame 42, and the end with the clamping wheel 45 moves toward the center of the circle to clamp the injection needle 9. The four clamping wheels 45 in the circular array can correct the syringe of the injection needle 9 so that the syringe is coaxial with the first rotating wheel 41.

[0051] Preferably, the pushing mechanism 6 includes a second cylinder 61, which is fixedly arranged on the second support plate 5, and the output end of the second cylinder 61 is connected to the first pushing plate 62, and the first connecting plate 63 is fixedly connected to the first pushing plate 62, and the lower end surface of the first connecting plate 63 is fixedly connected to the second pushing plate 64.

[0052] Preferably, the lower end surface of the second push plate 64 is an iron sheet, and the upper end surface of the injection needle 9 is provided with a magnet 91.

[0053] The injection needle 9 can be pre-fixed by the magnetic attraction of the magnet 91 and the iron sheet. Then, after the injection needle 9 is further corrected and clamped by the correction clamping mechanism 4, the first cylinder 21 is started to drive the first support plate 3 to move down to the needle tip of the injection needle 9 to insert into the injection port, and then the second cylinder 61 is started to push the second push plate 64 to squeeze the injection needle 9 to complete the injection.

[0054] Preferably, two first connecting plates 63 are provided and symmetrically arranged at both ends of the second pushing plate 64 , so as to better stabilize the second pushing plate 64 .

[0055] Preferably, the bottom of the first rotating ring 41 is fixedly connected to the second rotating ring 46 , and the bottom of the positioning frame 42 is connected to the top of the second rotating ring 46 .

[0056] Preferably, the deviation-correcting clamping mechanism 4 is provided with a fixing mechanism 7;

[0057] The fixing mechanism 7 includes a second connecting plate 71 , which is provided with two lower end surfaces of two clamping plates 43 slidably arranged opposite to each other. The lower end of the second connecting plate 71 facing the axis of the first rotating ring 41 is connected to a first rubber block 72 .

[0058] When the deviation-correcting clamping mechanism 4 clamps the syringe of the injection needle 9, the fixing mechanism 7 fixes the needle to prevent the needle from bending. When the two opposite first rubber blocks 72 come into contact, they push the second connecting plate 71 to slide back to back on the clamping plate 43. When clamping syringes of injection needles 9 of different sizes, the resistance of the fixing mechanism 7 will not affect the clamping of the deviation-correcting clamping mechanism 4.

[0059] Preferably, a slide groove 47 is provided on the lower end surface of the clamping plate 45, and the upper end surface of the second connecting plate 71 is slidably set in the slide groove 47. A spring 73 is provided in the slide groove 47, and one end of the spring 73 is fixedly connected to the slide groove 47, and the other end is fixedly connected to the second connecting plate 71.

[0060] Preferably, a third connecting plate 74 is provided at the lower end of the second connecting plate 71. The third connecting plate 74 is slidably disposed in the second connecting plate 71. A second rubber block 75 is connected to the lower end of the third connecting plate 74 on the side facing the axis of the first rotating ring 41.

[0061] The lower end surface of the second connecting plate 71 is flush with the upper end of the needle of the injection needle 9, and the lower end surface of the third connecting plate 74 is arranged above the bottom of the needle of the injection needle 9.

[0062] Preferably, a worm wheel 8 is fixedly connected to the upper end of the side surface of the first rotating ring 41 , and a worm 81 is rotatably provided on the first supporting plate 3 , and the worm 81 is meshedly connected with the worm wheel 8 .

[0063] Preferably, a silicone pad is provided on the side of the clamping wheel 45 to increase the friction force when clamping the syringe.

[0064] The working principle of the present invention is as follows: the magnet 91 on the top of the injection needle 9 is aligned with the lower end surface of the second push plate 64, the injection needle 9 is pre-fixed by the magnetic attraction between the magnet 91 and the metal, the worm 81 is rotated, and the worm wheel 8 engaged therewith rotates accordingly, the first rotating ring 41 fixedly connected to the worm wheel 8 rotates, and the positioning frame 41 provided between the first rotating ring 41 and the second rotating ring 46 rotates, so that the clamping plate 43 rotates around the other end under the rotation of the positioning frame 42, and one end with the clamping wheel 45 Move toward the center of the circle, fix the syringe of the injection needle 9 and correct the deviation at the same time. At the same time, the fixing mechanism 7 at the lower end of the clamping plate 43 also fixes the needle head. The first rubber block 72 and the second rubber block 73 fix the upper and lower ends of the needle head respectively to prevent the needle head from bending due to resistance when inserted into the injection port. Start the first cylinder 21 to drive the first support plate 3 to move down to the needle head of the injection needle 9 to insert into the injection port, and then start the second cylinder 61 to push the second push plate 64 to squeeze the injection needle 9 to complete the injection.

[0065] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A sampling device for a gas detection device, characterized in that: It includes a bottom plate and an injection needle, wherein the bottom plate is arranged above the detection device, and a first through hole is opened on the bottom plate, and the first through hole corresponds to the injection port of the detection device; A mounting plate is fixedly connected to the bottom plate, a first support plate is slidably provided on the mounting plate, a first cylinder is fixedly provided on the mounting plate, and an output end of the first cylinder is fixedly connected to a lower end surface of the first support plate; A second through hole is provided on the first support plate, and a deviation correction clamping mechanism for clamping the injection needle is provided in the second through hole; The deviation-correcting clamping mechanism includes a first rotating ring, which is rotatably arranged in the second through hole. A positioning frame is provided on the first rotating ring, and the positioning frames are provided with four and are evenly distributed in a circular array with the center of the first rotating ring as the center. A clamping plate is slidably provided in the positioning frame, and one end of the clamping plate is rotatably provided on the first support plate. The other end of the clamping plate is provided with an annular groove, and a clamping wheel is rotatably provided in the annular groove. The first through hole, the second through hole and the first rotating ring are coaxially arranged; A second supporting plate is fixedly provided on the first supporting plate, and a pushing mechanism for pushing the injection needle piston is provided on the second supporting plate.

2. The sample injection device according to claim 1, characterized in that The pushing mechanism includes a second cylinder, which is fixedly arranged on the second support plate. The output end of the second cylinder is connected to the first pushing plate, the first connecting plate is fixedly connected to the first pushing plate, and the lower end surface of the first connecting plate is fixedly connected to the second pushing plate.

3. The sample injection device according to claim 2, characterized in that The lower end surface of the second pushing plate is an iron sheet, and the upper end surface of the injection needle is provided with a magnet.

4. The sample injection device according to claim 3, characterized in that There are two first connecting plates, which are symmetrically arranged at both ends of the second pushing plate.

5. The sample injection device according to claim 1, characterized in that The bottom of the first rotating ring is fixedly connected to the second rotating ring, and the bottom of the positioning frame is connected to the top of the second rotating ring.

6. The sample injection device according to claim 1, characterized in that The deviation-correcting clamping mechanism is provided with a fixing mechanism; The fixing mechanism includes a second connecting plate, which is provided with two lower end surfaces of two clamping plates slidably arranged opposite to each other. The lower end of the second connecting plate facing the axis of the first rotating ring is connected to a first rubber block.

7. The sample injection device according to claim 6, characterized in that: A sliding groove is provided on the lower end surface of the clamping plate, and the upper end surface of the second connecting plate is slidably set in the sliding groove. A spring is provided in the sliding groove, one end of the spring is fixedly connected to the sliding groove, and the other end is fixedly connected to the second connecting plate.

8. The sample injection device according to claim 7, characterized in that: A third connecting plate is provided at the lower end of the second connecting plate, the third connecting plate being slidably arranged in the second connecting plate, and a second rubber block is connected to the lower end of the third connecting plate on a side facing the axis of the first rotating ring; The lower end surface of the second connecting plate is flush with the upper end of the injection needle, and the lower end surface of the third connecting plate is arranged above the bottom of the injection needle.

9. The sample injection device according to claim 1, characterized in that: A worm gear is fixedly connected to the upper end of the side surface of the first rotating ring, and a worm is rotatably provided on the first supporting plate, and the worm is meshed with the worm gear.

10. The sample injection device according to any one of claims 1 to 9, characterized in that: A silicone pad is provided on the side of the clamping wheel.

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