Sampling device for liquid chromatograph

Abstract

The utility model relates to the technical field of liquid chromatographs, and discloses a sample introduction device for a liquid chromatograph, which comprises a sample disc, a position adjusting mechanism is arranged in the sample disc, a first screw rod is rotated through an arranged clamping and fixing mechanism, a clamping block is firstly contacted with a sample bottle with a larger diameter, and then a sample bottle with a larger diameter is inserted into the position adjusting mechanism; when the sample bottles are fixed between the clamping plates and the clamping blocks, the large sample bottles are fixed between the clamping plates and the clamping blocks, the clamping blocks slide on the inner side of the fixing frame, the other clamping blocks make contact with the sample bottles with the small diameters, and the sample bottles with the small diameters are fixed between the corresponding clamping plates and the corresponding clamping blocks. Then a pull plate is pulled downwards, so that a pressing column of the pull plate abuts against the top of a clamping block, at the moment, a connecting rod and a push rod are in a straight line parallel state, secondary fixing of the clamping block is completed, the situation that a sample falls off between a clamping plate and the clamping block in the follow-up moving process is prevented, and therefore the device can synchronously complete rapid fixing of sample bottles of different sizes.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid chromatograph with technical field, specifically be a kind of for liquid chromatograph sample introduction device. BACKGROUND

[0002] The sample introduction device for liquid chromatograph, its sample introduction device is the key equipment that will be measured sample is introduced into chromatographic column without loss in liquid chromatograph, through sample injector, liquid sample can be accurately sent into chromatographic column, and subsequent separation and detection process is carried out.

[0003] According to the sample introduction device for liquid chromatograph disclosed in patent network, (authorization announcement is CN 218766797U) described in it, “a kind of for liquid chromatograph sample introduction device, including sampling disc and sample disc, the sampling disc (3) and sample disc are equipped with multiple corresponding placement holes, the upper end surface of the sample disc is movably connected with movable block and multiple mutually fixed movable frame, the movable frame is fixedly connected with the movable block, a plurality of fixed rings are installed in the movable frame, a plurality of movable rings are movably connected in the movable frame, the movable ring is installed with transmission rod, the transmission rod is symmetrically installed with connecting rod at both ends, the upper end surface of the sample disc is equipped with power device.”

[0004] For the above description, the applicant believes that the following problems exist:

[0005] The utility model in the use process, the device is moved by rotating screw rod connecting rod, to drive each movable ring to move and clamp sample bottle in synchronism, to realize the synchronous clamping of multiple sample bottles and the later sample introduction, but in actual use process, when the device clamps multiple sample bottles of different sizes simultaneously, since each movable ring is fixed on the connecting rod, the movable ring cannot adjust the appropriate clamping position according to the diameter of sample bottle of different sizes, thereby leading to that the sample bottle of smaller diameter cannot be effectively clamped, and the clamping position required by the device for different sample bottles is different, so that the device cannot accurately adjust the appropriate clamping position, thereby leading to that the clamping effect of the device for different sample bottles is poor, thus a sample introduction device for liquid chromatograph needs to be improved. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a sample introduction device for liquid chromatograph to solve the problems raised in the above background.

[0007] To achieve the above object, the utility model provides the following technical scheme: a sample introduction device for liquid chromatograph, including sample disc, the inside of the sample disc is provided with positioner, the top of the positioner is provided with clamping and fixing mechanism, the inner side of the sample disc is provided with sample groove, the rear of the sample disc is provided with sampling disc;

[0008] The clamping fixing mechanism comprises a clamping assembly and a fixing assembly, the fixing assembly is arranged on the top of the clamping assembly, and the sampling disc and the sample groove of the sample disc are of the same size, so that multiple sample bottles of different sizes can be clamped quickly.

[0009] Preferably, the adjusting mechanism comprises a bidirectional screw rod, the bidirectional screw rod is rotationally connected in the sample disc, a threaded block is threadedly connected to the outside of the bidirectional screw rod, a support rod is rotationally connected to the front surface of the threaded block, a lifting plate is rotationally connected to the end of the support rod away from the threaded block, a push block is fixedly connected to the top of the lifting plate, a positioning column is inserted into the sample disc, and a movable frame is fixedly connected to the top of the positioning column, so that the clamping position can be adjusted according to the size of the sample.

[0010] Preferably, the bottom of the positioning column abuts against the top of the push block, and the lifting plate is slidingly connected to the inner side of the sample disc, so that the lifting plate can be driven to move up and down.

[0011] Preferably, the clamping assembly comprises a first screw rod, the first screw rod is rotationally connected in the movable frame, a sliding frame is threadedly connected to the outside of the first screw rod, a synchronous frame is fixedly connected to the inner side of the sliding frame, a clamping plate is fixedly connected to the top of the movable frame, a clamping block is slidingly connected to the inner side of the synchronous frame, springs are fixedly connected between the clamping block and the synchronous frame, a sliding column is fixedly connected to the right side of the clamping block, and a sliding sleeve is fixedly connected to the left side of the synchronous frame, so that multiple sample bottles of different sizes can be clamped synchronously.

[0012] Preferably, grooves are formed in the corresponding positions of the sliding column and the sliding sleeve, the sliding column is slidingly connected in the groove, a plurality of through holes are formed in the top of the synchronous frame, and the sliding frame is slidingly connected to the top of the movable frame, so that the sample can be clamped between the clamping plate and the clamping block.

[0013] Preferably, the fixing assembly comprises a positioning sleeve, the positioning sleeve is fixedly connected to the top of the synchronous frame, a positioning frame is fixedly connected to the top of the synchronous frame, a pressing column is slidingly connected to the inner side of the positioning frame, connecting rods are rotationally connected to the front and back sides of the pressing column, push rods are rotationally connected to the front and back sides of the connecting rods, and a pull plate is fixedly connected to the right side of the connecting rod, so that the clamping blocks at different positions can be fixed.

[0014] Preferably, the end of the push rod away from the connecting rod is rotationally connected to the front and back sides of the positioning frame, through holes are formed in the corresponding positions of the pressing column and the positioning sleeve, the pressing column is slidingly connected in the through hole, and the through hole formed in the synchronous frame is above the pressing column, so that the pressing column can move downward and abut against the clamping block.

[0015] Compared with the prior art, the utility model provides a kind of for liquid chromatograph sampling device, with following beneficial effects:

[0016] The sample feeding device for liquid chromatograph, through the clamping and fixing mechanism, rotates the first screw rod, the clamping block first contacts the sample bottle with larger diameter, so that the sample bottle with larger diameter is fixed between the clamping plate and the clamping block, the clamping block slides in the inner side of the fixing frame, until the other clamping blocks contact the sample bottles with smaller diameter, so that the sample bottles with smaller diameter are fixed between the corresponding clamping plate and clamping block, when all the sample bottles are fixed between the clamping plate and the clamping block, the pressure column abuts against the top of the clamping block through the downward pulling plate, at this time, the connecting rod and the push rod are in a straight line parallel state, so that the secondary fixation of the clamping block is completed, thereby preventing the sample from falling off between the clamping plate and the clamping block in the subsequent movement process, so that the device can synchronously complete the rapid fixation of the sample bottles with different sizes.

[0017] The sample feeding device for liquid chromatograph, through the clamping and fixing mechanism, rotates the first screw rod, the clamping block first contacts the sample bottle with larger diameter, so that the sample bottle with larger diameter is fixed between the clamping plate and the clamping block, the clamping block slides in the inner side of the fixing frame, until the other clamping blocks contact the sample bottles with smaller diameter, so that the sample bottles with smaller diameter are fixed between the corresponding clamping plate and clamping block, when all the sample bottles are fixed between the clamping plate and the clamping block, the pressure column abuts against the top of the clamping block through the downward pulling plate, at this time, the connecting rod and the push rod are in a straight line parallel state, so that the secondary fixation of the clamping block is completed, thereby preventing the sample from falling off between the clamping plate and the clamping block in the subsequent movement process, so that the device can synchronously complete the rapid fixation of the sample bottles with different sizes. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of not paying creative labor.

[0019] Figure 1 It is an appearance structure schematic diagram of the present application;

[0020] Figure 2 It is a front view structure schematic diagram of the present application;

[0021] Figure 3 It is an appearance structure schematic diagram of the clamping and fixing mechanism of the present application;

[0022] Figure 4 It is an expanded structure schematic diagram of the clamping assembly of the present application;

[0023] Figure 5 It is an expanded structure schematic diagram of the fixing assembly of the present application;

[0024] Figure 6 It is an expanded structure schematic diagram of the position adjusting mechanism of the present application.

[0025] In the figure: 1, sample disc; 2, position adjusting mechanism; 3, sample taking disc; 4, clamping and fixing mechanism; 5, sample groove; 41, clamping assembly; 42, fixing assembly; 411, No. 1 screw rod; 412, sliding frame; 413, synchronous frame; 414, clamping plate; 415, clamping block; 416, spring; 417, sliding column; 418, sliding sleeve; 421, positioning sleeve; 422, positioning frame; 423, pressing column; 424, connecting rod; 425, push rod; 426, pull plate; 21, bidirectional screw rod; 22, threaded block; 23, supporting rod; 24, lifting plate; 25, push block; 26, positioning column; 27, movable frame. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. EMBODIMENT

[0028] Please refer to Figures 1-6 The present application provides a technical scheme: a sample feeding device for liquid chromatograph, comprising a sample disc 1, the inside of the sample disc 1 is provided with a position adjusting mechanism 2, the top of the position adjusting mechanism 2 is provided with a clamping and fixing mechanism 4, the inner side of the sample disc 1 is provided with a sample groove 5, and the rear of the sample disc 1 is provided with a sample taking disc 3.

[0029] The clamping and fixing mechanism 4 comprises a clamping assembly 41 and a fixing assembly 42, the fixing assembly 42 is arranged at the top of the clamping assembly 41, and the sample taking disc 3 is consistent in size with the sample groove 5 of the sample disc 1, so that multiple sample bottles of different sizes can be clamped quickly.

[0030] Further, the clamping assembly 41 comprises a first screw rod 411 rotatably connected inside the movable frame 27, the first screw rod 411 is externally threadedly connected with a sliding frame 412, the sliding frame 412 is fixedly connected with a synchronous frame 413 on the inner side, the movable frame 27 is fixedly connected with a clamping plate 414 on the top, the synchronous frame 413 is slidably connected with a clamping block 415 on the inner side, the clamping block 415 and the synchronous frame 413 are fixedly connected with a spring 416 therebetween, the clamping block 415 is fixedly connected with a sliding column 417 on the right side, the synchronous frame 413 is fixedly connected with a sliding sleeve 418 on the left side, so as to conveniently clamp multiple sample bottles of different sizes synchronously.

[0031] Further, grooves are formed at the corresponding positions of the sliding column 417 and the sliding sleeve 418, the sliding column 417 is slidably connected in the groove, a plurality of through holes are formed in the top of the synchronous frame 413, and the sliding frame 412 is slidably connected on the top of the movable frame 27, so as to conveniently clamp the sample between the clamping plate 414 and the clamping block 415.

[0032] Further, the fixing assembly 42 comprises a positioning sleeve 421 fixedly connected on the top of the synchronous frame 413, the synchronous frame 413 is fixedly connected with a positioning frame 422 on the top, the positioning frame 422 is slidably connected with a pressing column 423 on the inner side, the pressing column 423 is rotatably connected with a connecting rod 424 on the front and back sides, the connecting rod 424 is rotatably connected with a push rod 425 on the front and back sides, the connecting rod 424 is fixedly connected with a pull plate 426 on the right side, so as to conveniently fix the clamping block 415 at different positions.

[0033] Further, the push rod 425 is rotatably connected at the ends away from the connecting rod 424 on the front and back sides of the positioning frame 422, the pressing column 423 is formed with a through hole at the corresponding position of the positioning sleeve 421, the pressing column 423 is slidably connected in the through hole, and the through hole formed in the synchronous frame 413 is above the pressing column 423, so as to conveniently move the pressing column 423 downward to abut against the clamping block 415. Embodiment

[0034] Please refer to Figure 6 Further, according to the embodiment one, it is further obtained that the adjusting mechanism 2 comprises a bidirectional screw rod 21 rotatably connected inside the sample disc 1, the bidirectional screw rod 21 is externally threadedly connected with a threaded block 22, the threaded block 22 is rotatably connected with a supporting rod 23 on the front side, the supporting rod 23 is rotatably connected with a lifting plate 24 at the end away from the threaded block 22, the lifting plate 24 is fixedly connected with a push block 25 on the top, the sample disc 1 is inserted with a positioning column 26, the positioning column 26 is fixedly connected with a movable frame 27 on the top, so as to conveniently adjust the appropriate clamping position according to the size of the sample.

[0035] Further, the bottom of the positioning column 26 abuts against the top of the push block 25, and the lifting plate 24 is slidably connected on the inner side of the sample disc 1, so as to conveniently drive the lifting plate 24 to rise and fall.

[0036] In actual operation, when the device is in use, first, through the setting of the positioning mechanism 2, rotate the bidirectional screw rod 21 to move the threaded block 22 relative to the bidirectional screw rod 21, thereby driving the support rod 23 to move, so that the support rod 23 pulls the lifting plate 24 up and down during the movement, and then the lifting plate 24 drives each push block 25 to move up and down, so that the clamping position between different sample bottles can be accurately adjusted to the appropriate support height, and then the positioning column 26 is inserted into the sample disc 1, the bottom of the positioning column 26 abuts against the top of the push block 25, and multiple sample bottles of different sizes are placed in the sample groove 5, through the setting of the clamping and fixing mechanism 4, rotate the first screw rod 411, the sliding frame 412 is driven by the first screw rod 411 to move left, and then the synchronous frame 413 is driven by the sliding frame 412 to move left, so that the synchronous frame 413 drives multiple clamping blocks 415 to gradually approach the sample bottles, so that the clamping blocks 415 cooperate with the clamping plates 414, so that the sample bottles are clamped between the clamping plates 414 and the clamping blocks 415, and during the clamping process, the clamping blocks 415 first contact the larger diameter sample bottles, so that the larger sample bottles are fixed between the clamping plates 414 and the clamping blocks 415, at this time, other clamping blocks 415 continue to move left, so that the clamping blocks 415 slide inside the fixed frame, until other clamping blocks 415 contact smaller diameter sample bottles, so that smaller diameter sample bottles are fixed between the corresponding clamping plates 414 and clamping blocks 415, when all sample bottles are fixed between the clamping plates 414 and the clamping blocks 415, then pull the pull plate 426 downward, the connecting rod 424 is driven by the pull plate 426 to move downward, at this time the connecting rod 424 is limited by the push rod 425, and then the connecting rod 424 pushes the pressing column 423, and moves downward along the positioning sleeve 421, so that the pressing column 423 abuts against the top of the clamping block 415, at this time the connecting rod 424 and the push rod 425 are in a straight line parallel state, thereby completing the secondary fixation of the clamping block 415, and when all sample bottles are fixed, pull the movable frame 27 upward with both hands, so that the movable frame 27 is completely separated from the sample disc 1, and then the movable frame 27 with sample bottles is inserted into the sampling disc 3, thereby synchronously completing the rapid sampling of multiple sample bottles.

[0037] It is to be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components. Additionally, the terms "comprise," "comprises," and "comprising," or any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, unless otherwise indicated herein, the terms "first," "second," "third," etc., are not intended to denote a physical order, quantity, or importance, but rather are used for the purpose of nomenclature.

Claims

1. A sample introduction device for a liquid chromatograph comprising a sample disc (1) characterised in that: The sample disc (1) is internally provided with a positioning mechanism (2), the top of the positioning mechanism (2) is provided with a clamping fixing mechanism (4), the inner side of the sample disc (1) is provided with a sample groove (5), and the rear of the sample disc (1) is provided with a sampling disc (3); The clamping fixing mechanism (4) comprises a clamping assembly (41) and a fixing assembly (42), the fixing assembly (42) is arranged at the top of the clamping assembly (41), and the sampling disc (3) is consistent in size with the sample groove (5) of the sample disc (1); The clamping assembly (41) comprises a first screw rod (411), the first screw rod (411) is rotatably connected in the movable frame (27), the outer thread of the first screw rod (411) is connected with a sliding frame (412), the inner side of the sliding frame (412) is fixedly connected with a synchronous frame (413), the top of the movable frame (27) is fixedly connected with a clamping plate (414), the inner side of the synchronous frame (413) is slidably connected with a clamping block (415), the clamping block (415) and the synchronous frame (413) are fixedly connected with a spring (416), the right side of the clamping block (415) is fixedly connected with a sliding column (417), and the left side of the synchronous frame (413) is fixedly connected with a sliding sleeve (418); The fixing assembly (42) comprises a positioning sleeve (421), the positioning sleeve (421) is fixedly connected to the top of the synchronous frame (413), the top of the synchronous frame (413) is fixedly connected with a positioning frame (422), the inner side of the positioning frame (422) is slidably connected with a pressing column (423), the pressing column (423) is rotatably connected with a connecting rod (424) on the front and back sides, the connecting rod (424) is rotatably connected with a push rod (425) on the front and back sides, and the right side of the connecting rod (424) is fixedly connected with a pull plate (426).

2. A sample introduction device for a liquid chromatograph according to claim 1, wherein: The positioning mechanism (2) comprises a bidirectional screw rod (21), the bidirectional screw rod (21) is rotatably connected in the sample disc (1), the outer thread of the bidirectional screw rod (21) is connected with a threaded block (22), the front of the threaded block (22) is rotatably connected with a supporting rod (23), one end, away from the threaded block (22), of the supporting rod (23) is rotatably connected with a lifting plate (24), the top of the lifting plate (24) is fixedly connected with a push block (25), the sample disc (1) is inserted with a positioning column (26), and the top of the positioning column (26) is fixedly connected with a movable frame (27).

3. A sample introduction device for a liquid chromatograph according to claim 2, wherein: The bottom of the positioning column (26) abuts against the top of the push block (25), and the lifting plate (24) is slidably connected to the inner side of the sample disc (1).

4. A sample introduction device for a liquid chromatograph according to claim 1, wherein: Grooves are formed in the corresponding positions of the sliding column (417) and the sliding sleeve (418), the sliding column (417) is slidably connected in the groove, a plurality of through holes are formed in the top of the synchronous frame (413), and the sliding frame (412) is slidably connected to the top of the movable frame (27).

5. A sample introduction device for a liquid chromatograph according to claim 1, wherein: The push rod (425) is rotatably connected to the front and back sides of the positioning frame (422) away from one end of the connecting rod (424), the pressing column (423) is provided with a through hole at a corresponding position of the positioning sleeve (421), the pressing column (423) is slidably connected in the through hole, and the pressing column (423) is above the through hole provided in the synchronous frame (413).

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