Protective device of sample injector

Abstract

The utility model relates to the technical field of gas chromatographs, in particular to a protection device of a sample injector, which comprises an adjusting component, a positioning component, a positioning component and a control component, and the adjusting component comprises a platform, support frames symmetrically arranged in the platform, and positioning pieces matched with positioning holes for use; the protection assembly comprises a shell arranged in the platform, and a fixed part and a rotating part which are matched with the needle cylinder for use, the height of the platform can be adjusted by arranging an adjusting assembly, and meanwhile, the adjusted platform can be fixed by arranging a positioning part, so that the lengths of the needle head entering the sample injection port are the same, and the detection accuracy is improved. The experimental result has good accuracy and reproducibility; by arranging the protection assembly and the protection piece, a closed space is formed in the shell, chippings are effectively prevented from falling into the needle cylinder, meanwhile, through the fixing piece and the rotating piece, the needle cylinder can be effectively fixed, and the problem that the needle cylinder shakes during injection is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatographs, in particular to a protective device for a sample injector. Background Art

[0002] Gas chromatograph is an important instrument in the field of chromatographic analysis and is widely used in life science, material science, environmental protection, medical science and food safety. After more than half a century of development, gas chromatograph, as a representative of modern analytical instruments, is the most commonly used analytical chemistry method in various fields and plays an extremely important role in many analytical laboratories. When conducting gas chromatography analysis experiments in the laboratory, a micro-injector is used for manual injection. When injecting samples into the gas chromatograph, the position of the needle inserted into the gas chromatograph injection port must be consistent to ensure that the experimental data measured successively have good reproducibility.

[0003] However, the needles of existing microinjectors are generally long, and the experimenter needs to visually estimate the length of the needle entering the injection port when using it, which makes it difficult to maintain the same length of the needle entering each time, affecting the accuracy of the experiment. In addition, there is no protective device on the outside of the existing microinjector, which causes chips to fall into the syringe, making it inconvenient for the staff to use. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above-mentioned problems that the insertion length of the needle is difficult to maintain consistency and no protective device is provided, the present utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a protective device for a sample injector.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a protective device for a sample injector, comprising an adjustment assembly, including a platform, a support frame symmetrically arranged on the platform, suction cups arranged on both sides of the bottom end of the support frame, a positioning hole opened on the support frame, and a positioning member used in conjunction with the positioning hole;

[0008] The protection assembly includes a shell arranged in the platform, a syringe used in conjunction with the shell, a push rod and a needle arranged on the syringe, a protection piece arranged on the top of the shell, and a fixing piece and a rotating piece used in conjunction with the syringe.

[0009] As a preferred solution of the protective device of the sample injector described in the utility model, wherein: a through hole is symmetrically opened on one side of the platform, the through hole is connected to the positioning hole, and the positioning member includes a positioning rod arranged between the through hole and the positioning hole, a horizontal plate arranged on the positioning rod, a fixed block symmetrically arranged at the bottom of the platform, a placement groove opened on the fixed block, a blocking block arranged in the placement groove, an arc block and a spring arranged on the blocking block, and a connecting plate arranged at the bottom of the blocking block.

[0010] As a preferred solution of the protective device of the sample injector of the present invention, there are several positioning holes, which are arranged equidistantly, the diameters of the through hole, positioning hole and positioning rod are consistent, and the spring is located between the blocking block and the arc block.

[0011] As a preferred solution of the protective device of the sample injector described in the utility model, the size of the blocking block is smaller than the placement groove, both sides of the top of the placement groove are set as inclined surfaces and are located directly below the arc block, and the arc surface of the arc block is set on the side away from the spring.

[0012] As a preferred solution of the protective device of the sample injector of the utility model, the protective part includes a slide groove symmetrically opened on the top of the shell, a cover plate symmetrically arranged on the slide groove, a filler arranged on the cover plate, and magnets symmetrically arranged at both ends of the cover plate.

[0013] As a preferred solution of the protective device of the sample injector of the present invention, the opposing surfaces of the two cover plates are provided with semicircular grooves, the filler is located between the semicircular grooves, and the magnets at both ends of the two cover plates are of the same polarity and attract each other.

[0014] As a preferred solution of the protective device of the sample injector described in the utility model, the fixing part includes positive and negative screw rods symmetrically arranged inside the shell, a movable plate and a first belt arranged on the positive and negative screw rods, a clamping plate arranged on the movable plate, and a second belt arranged between the two groups of positive and negative screw rods.

[0015] As a preferred solution of the protective device of the sample injector of the present invention, one end of one group of the positive and negative threaded rods extends to the outside of the shell, and the splint is crescent-shaped and contacts the outer wall of the syringe.

[0016] As a preferred solution of the protective device of the sample injector described in the utility model, wherein: the rotating part includes a gear arranged on one of the forward and reverse screw rods, a movable groove opened on the top of the platform, a rack arranged on the movable groove, a connecting rod arranged on the rack, a limiting rod arranged on the connecting rod, and a concave block arranged on the top of the platform.

[0017] As a preferred solution of the protective device of the sample injector described in the utility model, the gear and the rack are engaged with each other, the connecting rod and the limiting rod are both "L" shaped, and one end of the limiting rod is located in the groove of the concave block.

[0018] The beneficial effects of the present invention are as follows: the present invention can adjust the height of the platform by providing an adjustment component, and can fix the adjusted platform by providing a positioning part, so that the length of the needle entering the injection port is the same, and the experimental results have good accuracy and reproducibility; by providing a protective component and a protective part, a closed space is formed inside the shell, which effectively prevents debris from falling into the syringe, and at the same time, the syringe can be effectively fixed by the fixing part and the rotating part to prevent the syringe from shaking during injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0020] Figure 1 The figure is an overall schematic diagram of a protective device for an injector.

[0021] Figure 2 It is a structural diagram of the positioning part.

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the fixed block and the blocking block.

[0023] Figure 4 Schematic diagram of the structure of the protection component.

[0024] Figure 5 Schematic diagram of the structure of the protective part.

[0025] Figure 6 Schematic diagram of the cross-sectional structure of the shell.

[0026] Figure 7 for Figure 4 Magnified view of area A in center. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing embodiments of the present invention, cross-sectional views of device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0031] Example 1

[0032] Reference Figure 1 - Figure 3 , which is the first embodiment of the present utility model, provides a protective device for an injector, including an adjustment assembly 100, comprising a platform 101, a gas chromatograph injector mounted on the platform 101, a support frame 102 symmetrically inserted into the platform 101, suction cups 103 fixedly mounted on both sides of the bottom end of the support frame 102, the support frame 102 being fixed by the suction force generated by the suction cups 103 contacting an object, a positioning hole 104 provided on the support frame 102, and a positioning member 105 used in conjunction with the positioning hole 104, the positioning member 105 being capable of adjusting the height of the platform 101;

[0033] The protective assembly 200 includes a shell 201 fixedly installed in the platform 101, a glass window is provided on one side of the shell 201, a syringe 202 used in conjunction with the shell 201, and scale lines are provided on the surface of the syringe 202. The scale lines on the surface of the syringe 202 are observed through the glass window to determine the amount of the test sample inside the syringe 202; a push rod 203 and a needle 204 provided on the syringe 202, and the test sample inside the syringe 202 is injected through the push rod 203 and the needle 204; a protective member 205 provided on the top of the shell 201, and the protective member 205 prevents debris from falling into the syringe 202; and a fixed member 206 and a rotating member 207 used in conjunction with the syringe 202, and the syringe 202 is fixed by the fixed member 206 and the rotating member 207.

[0034] Specifically, a through hole is symmetrically opened on one side of the platform 101, and the through hole is connected to the positioning hole 104. The positioning member 105 includes a positioning rod 105a inserted between the through hole and the positioning hole 104, the support frame 102 is positioned by the positioning rod 105a, a horizontal plate 105b fixedly installed on the positioning rod 105a, a fixed block 105c symmetrically installed at the bottom of the platform 101, a placement groove opened on the fixed block 105c, a blocking block 105d inserted in the placement groove, an arc block 105e and a spring 105f arranged on the blocking block 105d, through the contact between the arc block 105e and the top of the placement groove, the blocking block 105d can block the horizontal plate 105b, and a connecting plate 105g fixedly installed at the bottom of the blocking block 105d.

[0035] Furthermore, there are several positioning holes 104, which are equidistantly arranged. The diameters of the through hole, positioning hole 104 and positioning rod 105a are consistent. The spring 105f is located between the blocking block 105d and the arc block 105e, and the blocking block 105d can be reset by the spring 105f.

[0036] Furthermore, the size of the blocking block 105d is smaller than the placement groove, and both sides of the top of the placement groove are set as inclined surfaces and are located directly below the arc block 105e. The arc surface of the arc block 105e is set on the side away from the spring 105f.

[0037] Operation process: When in use, the device is placed in the position where it needs to be used. At this time, the suction force generated by the suction cup 103 contacting the object fixes the support frame 102. When the height of the sample injector needs to be adjusted, the connecting plate 105g is pulled downward so that the connecting plate 105g drives the blocking block 105d to descend. At this time, the arc block 105e will be squeezed by the inclined surfaces on both sides of the top of the placement groove, so that the arc block 105e will move toward the depth of the blocking block 105d. At this time, the arc block 105e and the blocking block 105d will be located inside the placement groove, and then the cross plate 105b is pulled outward so that the cross plate 105b drives the positioning rod 105a to move outward so that the positioning rod 105a no longer contacts the positioning hole 104. At this time, the platform 101 is adjusted up and down, and then the cross plate 105b is pushed again so that the positioning rod 105a is reset and engaged with the matching positioning hole 104 again, thereby completing the adjustment of the platform 101.

[0038] Example 2

[0039] Reference Figure 4 - Figure 5, which is the second embodiment of the present utility model. This embodiment is different from the first embodiment in that the protective member 205 includes a slide groove 205a symmetrically opened at the top of the shell 201, a cover plate 205b symmetrically arranged on the slide groove 205a, the cover plate 205b is slidably installed on the slide groove 205a, a filler 205c fixedly installed on the cover plate 205b, and magnets 205d symmetrically installed at both ends of the cover plate 205b.

[0040] Specifically, semicircular grooves are formed on the opposite surfaces of the two cover plates 205b, and the filler 205c is located between the semicircular grooves. The filler 205c is made of a flexible material, and the magnets 205d at both ends of the two cover plates 205b are of the same polarity and attract each other.

[0041] The rest of the structure is the same as that of Example 1.

[0042] Operation process: When placing the syringe 202, the two cover plates 205b are pulled toward opposite sides to separate the two cover plates 205b, and the syringe 202 is placed inside the shell 201. Then, the two cover plates 205b are pushed toward opposite sides to reset. At this time, the magnets 205d at both ends of the cover plates 205b are attracted to each other, fixing the two cover plates 205b together, and the filler 205c will also contact and be squeezed with the surface of the push rod 203. The filler 205c will be deformed and adhere to the surface of the push rod 203, thereby preventing debris from falling into the syringe 202. Then, the push rod 203 is pushed to allow the test sample inside the syringe 202 to be injected into the injection port through the needle 204. After the injection is completed, the push rod 203 is stopped. In subsequent experiments, the height of the platform 101 is kept consistent, so that the length of all needles 204 entering the injection port is the same, and the experimental results have good accuracy and reproducibility.

[0043] Example 3

[0044] Reference Figure 6 - Figure 7 , which is the third embodiment of the present utility model. This embodiment is different from the above embodiments in that the fixing member 206 includes positive and negative screw rods 206a symmetrically arranged inside the housing 201, and the positive and negative screw rods 206a have two groups, each group has two, a movable plate 206b and a first belt 206c arranged on the positive and negative screw rods 206a, the movable plate 206b is threadedly installed at both ends of the positive and negative screw rods 206a, and each group of positive and negative screw rods 206a is transmitted by the first belt 206c, a splint 206d fixedly installed on the movable plate 206b, the splint 206d has two groups, each group has two, and a second belt 206e is arranged between the two groups of positive and negative screw rods 206a, and the two groups of positive and negative screw rods 206a are transmitted by the second belt 206e.

[0045] Specifically, one end of one set of forward and reverse screw rods 206a extends to the outside of the housing 201, and one end is fixedly connected to a gear 207a. The clamping plate 206d is crescent-shaped and contacts the outer wall of the syringe 202 to clamp the syringe 202.

[0046] Furthermore, the rotating part 207 includes a gear 207a fixedly mounted on one of the forward and reverse screw rods 206a, a movable groove 207b opened on the top of the platform 101, a rack 207c slidably mounted on the movable groove 207b, a connecting rod 207d fixedly mounted on the rack 207c, a limiting rod 207e slidably mounted on the connecting rod 207d, and a concave block 207f fixedly mounted on the top of the platform 101.

[0047] Furthermore, the gear 207a and the rack 207c are meshed with each other, the connecting rod 207d and the limiting rod 207e are both "L" shaped, one end of the limiting rod 207e is located in the groove of the concave block 207f, and the limiting rod 207e is limited by the concave block 207f.

[0048] The rest of the structure is the same as that of Example 2.

[0049] Operation process: Before the syringe 202 is placed, the limiting rod 207e is pulled outward so that the bottom end of the limiting rod 207e moves out of the groove of the concave block 207f, and then the connecting rod 207d is pushed to make the rack 207c start to move. At the same time, due to the engagement, the gear 207a also starts to rotate, thereby driving one of the forward and reverse screw rods 206a to rotate, and the first belt 206c matched therewith drives the first group of forward and reverse screw rods 206a to rotate synchronously, and at the same time, the second belt 206e drives one of the forward and reverse screw rods 206a of the second group to rotate, and the first belt 206c matched therewith drives the second group of forward and reverse screw rods 206a to rotate. The other forward and reverse screw rod 206a is driven to rotate, thereby making the two groups of forward and reverse screw rods 206a rotate synchronously, and the movable plate 206b drives the splint 206d to move toward the opposite side, so that the distance between each group of splints 206d is increased. After the syringe 202 is installed, the rack 207c is reset through the connecting rod 207d, and the above steps are repeated to move the splint 206d toward the opposite side to clamp the syringe 202 so that it will not shake during injection, and then reset the limit rod 207e, and limit the limit rod 207e through the groove of the concave block 207f, so that the rack 207c cannot move.

[0050] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete elements can be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0051] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0052] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A protective device for a sample injector, characterized in that: include, An adjustment assembly (100) comprises a platform (101), a support frame (102) symmetrically arranged on the platform (101), suction cups (103) arranged on both sides of the bottom end of the support frame (102), a positioning hole (104) provided on the support frame (102), and a positioning member (105) used in conjunction with the positioning hole (104); The protective assembly (200) comprises a housing (201) arranged in the platform (101), a syringe (202) used in conjunction with the housing (201), a push rod (203) and a needle (204) arranged on the syringe (202), a protective member (205) arranged on the top of the housing (201), and a fixing member (206) and a rotating member (207) used in conjunction with the syringe (202).

2. The protective device for the sample injector according to claim 1, wherein: A through hole is symmetrically provided on one side of the platform (101), and the through hole is connected to the positioning hole (104). The positioning member (105) includes a positioning rod (105a) arranged between the through hole and the positioning hole (104), a transverse plate (105b) arranged on the positioning rod (105a), a fixed block (105c) symmetrically arranged at the bottom of the platform (101), a placement groove provided on the fixed block (105c), a blocking block (105d) arranged in the placement groove, an arc block (105e) and a spring (105f) arranged on the blocking block (105d), and a connecting plate (105g) arranged at the bottom of the blocking block (105d).

3. The protective device for the sample injector according to claim 2, wherein: There are a plurality of positioning holes (104) which are equidistantly arranged. The diameters of the through hole, positioning hole (104) and positioning rod (105a) are consistent. The spring (105f) is located between the blocking block (105d) and the arc block (105e).

4. The protective device for the sample injector according to claim 3, wherein: The size of the blocking block (105d) is smaller than the placement slot, both sides of the top of the placement slot are set as inclined surfaces and are located directly below the arc block (105e), and the arc surface of the arc block (105e) is set on the side away from the spring (105f).

5. The protective device for the sample injector according to claim 1 or 4, characterized in that: The protective member (205) comprises a slide groove (205a) symmetrically arranged at the top of the housing (201), a cover plate (205b) symmetrically arranged on the slide groove (205a), a filler (205c) arranged on the cover plate (205b), and magnets (205d) symmetrically arranged at both ends of the cover plate (205b).

6. The protective device for the sample injector according to claim 5, characterized in that: Semicircular grooves are provided on opposite surfaces of the two cover plates (205b), the filler (205c) is located between the semicircular grooves, and the magnets (205d) at both ends of the two cover plates (205b) are of the same polarity and attract each other.

7. The protective device for the sample injector according to claim 6, characterized in that: The fixing member (206) includes forward and reverse threaded rods (206a) symmetrically arranged inside the housing (201), a movable plate (206b) and a first belt (206c) arranged on the forward and reverse threaded rods (206a), a clamping plate (206d) arranged on the movable plate (206b), and a second belt (206e) arranged between two groups of the forward and reverse threaded rods (206a).

8. The protective device for the sample injector according to claim 7, wherein: One end of one group of the forward and reverse threaded rods (206a) extends to the outside of the housing (201), and the clamping plate (206d) is crescent-shaped and contacts the outer wall of the syringe (202).

9. The protective device for the sample injector according to claim 7 or 8, characterized in that: The rotating member (207) includes a gear (207a) arranged on one of the forward and reverse screw rods (206a), a movable groove (207b) opened on the top of the platform (101), a rack (207c) arranged on the movable groove (207b), a connecting rod (207d) arranged on the rack (207c), a limiting rod (207e) arranged on the connecting rod (207d), and a concave block (207f) arranged on the top of the platform (101).

10. The protective device for the sample injector according to claim 9, characterized in that: The gear (207a) and the rack (207c) are meshed with each other, and the connecting rod (207d) and the limiting rod (207e) are both "L"-shaped, with one end of the limiting rod (207e) located in the groove of the concave block (207f).

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