Sample containing device of ion chromatograph

Abstract

The invention relates to the technical field of sample containing device design, in particular to an ion chromatograph sample containing device which comprises a machine body, a rotating disc is installed on the upper surface of a supporting column, a circular notch is formed in the upper surface of the rotating disc, an abutting disc is installed in the circular notch, a penetrating opening is formed in the upper surface of the machine body, and a rotating shaft is arranged in the penetrating opening. A spring sleeve is installed on the upper surface of the abutting disc, a first telescopic spring is arranged in the spring sleeve, a fixing ring is connected to the pressing sleeve in a sleeving mode, a pressing component used for pressing is arranged on the pressing sleeve, an abutting block is installed in the through opening, and containing assemblies distributed in a circumferential mode are arranged on the rotary disc. A clamping part for fixing a sample is arranged on the containing disc, and a switch part for allowing the sample to pass through is arranged on the side wall of the machine body. Through cooperation of the pressing assembly and the containing assembly, a user does not need to stretch a hand into the containing device to take the sample, and the situation that the sample container is damaged due to human errors is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sample holding device design, and in particular to an ion chromatograph sample holding device. Background Art

[0002] Ion chromatography is an analytical technology used to separate and detect various ions in solution. Its working principle is based on the charge properties of ions and their interactions with the stationary phase. The separation and detection of ions are achieved through the differences in these interactions. The sample holding device is mainly used to hold containers filled with samples.

[0003] The sample holding devices of existing ion chromatographs are mostly sealed containers. During high-frequency sampling, since one needs to reach into the holding device with a relatively narrow operating space to take the sample, one may accidentally touch the sample container and cause it to topple over and break, resulting in sample loss or contamination. Summary of the invention

[0004] The purpose of the invention is to solve the following shortcomings in the prior art: the sample holding devices of existing ion chromatographs are mostly closed containers, and the sampling process often requires a long time to pick up and place by hand. The sample container may be accidentally damaged during the process, resulting in sample loss or contamination, and a lot of time may be spent in searching for samples, resulting in the destruction of the constant temperature environment in the container. A sample holding device for an ion chromatograph is proposed.

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

[0006] A sample holding device for an ion chromatograph comprises a body, a support column is fixedly installed on the bottom wall of the body, a turntable is rotatably installed on the upper surface of the support column, a circular notch is provided on the upper surface of the turntable, a pressure plate is rotatably installed in the circular notch, a through hole is provided on the upper surface of the body, a rotating shaft is provided in the through hole, a rotating cap with a special shape mark is fixedly installed on one end of the rotating shaft, and the other end passes through the pressure plate and is fixedly connected to the turntable, a spring sleeve is fixedly installed on the upper surface of the pressure plate, a first telescopic spring is provided in the spring sleeve, a pressing sleeve is vertically slidably installed in the through hole, the first telescopic spring and the pressing sleeve are both slidably sleeved on the surface of the rotating shaft, and the lower surface contacts the top end of the first telescopic spring, a fixing ring is fixedly sleeved on the surface of the pressing sleeve, and a pressing component for pressing is provided on the pressing sleeve. The surface of the pressure plate is provided with a through opening, and a pressure block is horizontally slidably installed in the through opening, and rollers are fixedly installed on the pressure block and the surface of the fixed ring, and a connecting rod is rotatably installed between the two rollers, and a holding component distributed in a circle is provided on the turntable, and the holding component includes a limiting groove whose size matches the through opening and is provided on the surface of the turntable, and a holding plate is horizontally slidably installed in the limiting groove, and gaps are reserved between the two sides of the holding plate and the side walls of the limiting groove, and second telescopic springs are provided in the two gaps, one end of which is fixedly connected to the side wall of the limiting groove and the other end of which contacts with the raised end of the holding plate, and a clamping component for fixing the sample is provided on the holding plate, and a spring rod with a top end fixedly connected to the top wall of the body is fixedly installed on the upper surface of the pressure plate, and a switch component for the sample to pass is provided on the side wall of the body.

[0007] Preferably, a sampling platform in contact with the switch component is provided on one side of the machine body close to the switch component, an electric telescopic rod is rotatably installed on the upper surface of the sampling platform, an installation cavity is opened in the sampling platform, a driving motor is fixedly installed in the installation cavity, the output shaft of the driving motor passes through the sampling platform and is fixedly connected to the bottom end of the electric telescopic rod, a sliding rod is fixedly installed on the side wall of the electric telescopic rod, an annular sleeve is fixedly installed on the end of the sliding rod away from the electric telescopic rod, a liquid storage tube is fixedly installed in the annular sleeve, the lower end of the liquid storage tube is fixedly connected to a liquid injection tube, and the lower end of the liquid injection tube is fixedly connected to an injection tube. The liquid storage tube and the liquid injection tube are provided with a connected liquid injection cavity inside, the surface of the liquid injection needle is provided with a plurality of first injection ports connected with the liquid injection cavity and distributed in a circle, the lower end of the liquid injection needle is provided with a sampling needle in contact with it, the liquid injection cavity is provided with a sampling tube, the sampling needle is provided with two second injection ports connected with the inside of the sampling tube, the liquid injection needle is vertically slidably sleeved on the surface of the sampling tube, the lower end of the sampling tube is fixedly connected to the sampling needle, the upper end of the sampling tube passes through the liquid injection cavity and a piston is fixedly sleeved on the surface, and the position of the piston is adjusted by a positioning assembly.

[0008] Preferably, the positioning assembly includes two second connecting columns fixedly mounted on the upper surface of the piston, a grab ring, two slide grooves provided on the side wall of the liquid storage tube, a sealing groove provided in the slide groove, and a sealing plate vertically slidably mounted in the sealing groove; the inner wall of the grab ring is fixedly connected to a plurality of second connecting columns via a first connecting column horizontally passing through the two sealing plates; and the side wall of the liquid storage tube is provided with a vent hole connected to the sealing groove.

[0009] Preferably, a sampling column is fixedly installed on the side wall of the electric telescopic rod, and the sampling column is fixedly connected to a rotating sleeve. Two sampling plates are rotatably installed in the rotating sleeve, and a rubber ring for increasing the rotational friction is provided in the rotating sleeve. A second fixing groove is provided on each side of the two sampling plates that are close to each other.

[0010] Preferably, a funnel-shaped waste liquid port is provided on the upper surface of the sampling platform and is located directly below the sampling needle. A waste liquid collection box is fixedly mounted on the side wall of the sampling platform, and the bottom of the waste liquid port is connected to the waste liquid collection box through a pipeline.

[0011] Preferably, the clamping component comprises a placement opening opened in the middle of the containing plate, a first fixing groove is opened in the placement opening, a sample cylinder is arranged outside the turntable, and a fixing handle matching the first fixing groove is fixedly sleeved on the surface of the sample cylinder.

[0012] Preferably, the switch component comprises an opening provided in the side wall of the machine body, a rectangular plate is horizontally slidably installed in the opening, a strip groove is provided in the side wall of the machine body, a handle fixedly connected to the rectangular plate is horizontally slidably installed in the strip groove.

[0013] Preferably, the special shape mark includes a cross-shaped protrusion on the rotating cap, and the cross-shaped protrusion corresponds to and matches the position of each containing tray.

[0014] Preferably, the pressing component comprises an annular handle, and the surface of the pressing sleeve is fixedly connected to the inner wall of the annular handle via a plurality of fixing columns.

[0015] Preferably, a plurality of temperature controllers are fixedly mounted on the bottom wall of the machine body, and the plurality of temperature controllers are used to adjust the temperature inside the machine body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Select the corresponding sample by rotating the cross-shaped protrusion on the rotating cap, then open the switch component, and then use the pressing component to make the pressing sleeve and the fixing ring start to move vertically downward and squeeze the first telescopic spring in the spring sleeve, and then the fixing ring will start to squeeze the pressing block to move outward through the connecting rod, and the pressing block will push the holding plate to move outward along the limiting groove, and at the same time, the protruding end of the holding plate will start to squeeze the two second telescopic springs. When the holding plate moves to the specified position, the sample is then released by the clamping component. After this process is completed, other components will automatically reset under the rebound action of the first telescopic spring and the second telescopic spring, which not only improves the efficiency of taking samples, but also does not require the hand to reach into the holding device to take, reducing the damage of the sample container due to human error;

[0018] 2. When the final sampling process is completed, if the sampling needle and the sample tube need to be cleaned, you only need to move the grab ring upward to the top of the slide slot, and the piston will leave the injection cavity and return to the liquid storage tube. At this time, start the drive motor to make the entire injection tube enter the sample tube, and then pour the cleaning liquid into the liquid storage tube. The cleaning liquid will flow into the multiple first injection ports and the first injection port along the injection cavity and the sampling tube, and finally gather in the sample tube, so as to prevent the entire cleaning time from being too long due to the slow flow rate of the cleaning liquid from the first injection port, thereby improving the cleaning efficiency;

[0019] 3. The entire cleaning process can clean the inside of the sample cylinder and the residual sample solution in the sampling tube and the second injection port. When the water level in the sample cylinder covers the sampling needle, the residual sample solution on its surface can also be cleaned. The entire sampling device is cleaned thoroughly, effectively preventing the mutual contamination between the residual sample solutions, which may cause errors in the results of ion chromatograph analysis, and improving the accuracy of the experiment;

[0020] 4. When the cleaning work is completed, just rotate the sampling plate clockwise along the rotating sleeve, dump the sample tube so that the waste liquid after cleaning flows into the waste liquid port, and finally flows into the waste liquid collection box through the pipeline, and then the waste liquid is centrally treated for pollution-free treatment to prevent the waste liquid from polluting the ecological environment;

[0021] 5. By controlling multiple temperature controllers, the temperature inside the machine body can reach the required storage temperature and maintain a constant temperature, making the storage environment of the sample more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a sample holding device for an ion chromatograph proposed by the present invention;

[0023] Figure 2 It is a partial cross-sectional structural schematic diagram of a body and a sampling platform in a sample holding device for an ion chromatograph proposed by the present invention;

[0024] Figure 3 It is a partial cross-sectional structural schematic diagram of a pressing sleeve and a turntable in a sample holding device for an ion chromatograph proposed by the present invention;

[0025] Figure 4 It is a schematic diagram of a partial three-dimensional structure of a pressing sleeve and a turntable in a sample holding device for an ion chromatograph proposed by the present invention;

[0026] Figure 5 A schematic diagram of a partial three-dimensional structure of a holding plate and a clamping component in a sample holding device for an ion chromatograph proposed by the present invention;

[0027] Figure 6 It is a partial three-dimensional structural schematic diagram of a liquid storage tube and a liquid injection tube in a sample holding device for an ion chromatograph proposed by the present invention;

[0028] Figure 7 This is a partial cross-sectional structural schematic diagram of a liquid storage tube and a sampling tube in a sample holding device for an ion chromatograph proposed by the present invention;

[0029] Figure 8 This is a partial three-dimensional structural schematic diagram of a piston and a liquid injection pipe in a sample holding device for an ion chromatograph proposed by the present invention;

[0030] Fig. 9 for Figure 1 A magnified view of the structure in the middle.

[0031] In the figure: 1 body, 2 support column, 3 turntable, 4 pressure plate, 5 rotating shaft, 6 rotating cap, 7 spring sleeve, 8 pressing sleeve, 9 first telescopic spring, 10 fixing ring, 11 pressure block, 12 rotating roller, 13 connecting rod, 14 holding plate, 15 second telescopic spring, 16 annular handle, 17 fixing column, 18 spring rod, 19 sampling platform, 20 electric telescopic rod, 21 driving motor, 22 sliding rod, 23 annular sleeve, 24 liquid storage tube, 25 liquid injection tube, 26 liquid injection needle, 27 sampling needle , 28 injection cavity, 29 first injection port, 30 sampling tube, 31 vent, 32 second injection port, 33 piston, 34 slide groove, 35 sealing plate, 36 grab ring, 37 first connecting column, 38 second connecting column, 39 sampling column, 40 rotating sleeve, 41 sampling plate, 42 second fixed groove, 43 waste liquid port, 44 waste liquid collection box, 45 placement port, 46 first fixed groove, 47 sample cylinder, 48 fixed handle, 49 rectangular plate, 50 strip groove, 51 handle, 52 temperature controller. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Reference Figure 1-Figure 9 , an ion chromatograph sample holding device comprises a body 1, a support column 2 is fixedly installed on the bottom wall of the body 1, a turntable 3 is rotatably installed on the upper surface of the support column 2, a circular notch is opened on the upper surface of the turntable 3, a pressure plate 4 is rotatably installed in the circular notch, a through opening is opened on the upper surface of the body 1, a rotating shaft 5 is arranged in the through opening, a rotating cap 6 with a special shape mark is fixedly installed on one end of the rotating shaft 5, and the other end passes through the pressure plate 4 and is fixedly connected with the rotating disk 3, a spring sleeve 7 is fixedly installed on the upper surface of the pressure plate 4, a first telescopic spring 9 is arranged in the spring sleeve 7, a pressing sleeve 8 is vertically slidably installed in the through opening, the first telescopic spring 9 and the pressing sleeve 8 are both slidably sleeved on the surface of the rotating shaft 5, and the lower surface is in contact with the top of the first telescopic spring 9, a fixing ring 10 is fixedly sleeved on the surface of the pressing sleeve 8, a pressing component for pressing is arranged on the pressing sleeve 8, and the pressure A through opening is provided on the surface of the disk 4, in which a pressure block 11 is horizontally slidably installed, and rollers 12 are fixedly installed on the surfaces of the pressure block 11 and the fixed ring 10, and a connecting rod 13 is rotatably installed between the two rollers 12. A holding component distributed in a circle is provided on the turntable 3, and the holding component includes a limiting groove whose size matches the through opening and is provided on the surface of the turntable 3, and a holding disk 14 is horizontally slidably installed in the limiting groove, and gaps are reserved between the two sides of the holding disk 14 and the side walls of the limiting groove, and a second telescopic spring 15 is provided in each of the two gaps, one end of which is fixedly connected to the side wall of the limiting groove and the other end is in contact with the raised end of the holding disk 14, and a clamping component for fixing the sample is provided on the holding disk 14, and a spring rod 18 whose top end is fixedly connected to the inner top wall of the body 1 is fixedly installed on the upper surface of the pressure disk 4, and a switch component for the sample to pass through is provided on the side wall of the body 1.

[0034] The clamping component includes a placement opening 45 opened in the middle of the placing plate 14, a first fixing groove 46 is opened in the placement opening 45, a sample tube 47 is arranged outside the turntable 3, and a fixing handle 48 matching the first fixing groove 46 is fixedly sleeved on the surface of the sample tube 47.

[0035] The switch component includes an opening formed in the side wall of the body 1 , in which a rectangular plate 49 is horizontally slidably installed. A strip groove 50 is formed in the side wall of the body 1 , in which a handle 51 fixedly connected to the rectangular plate 49 is horizontally slidably installed.

[0036] The special shape mark includes a cross-shaped protrusion on the rotating cap 6 , and the cross-shaped protrusion corresponds to and matches the position of each containing tray 14 .

[0037] The pressing component includes an annular handle 16 , and the surface of the pressing sleeve 8 is fixedly connected to the inner wall of the annular handle 16 via a plurality of fixing columns 17 .

[0038] A sampling column 39 is fixedly installed on the side wall of the electric telescopic rod 20, and the sampling column 39 is fixedly connected to a rotating sleeve 40. Two sampling plates 41 are rotatably installed in the rotating sleeve 40, and a rubber ring for increasing the rotational friction is provided in the rotating sleeve 40. A second fixing groove 42 is provided on the side where the two sampling plates 41 are close to each other.

[0039] First, select the desired sample tube 47 by identifying the cross-shaped mark on the rotating cap 6, then rotate the rotating cap 6 to make the holding tray 14 of the sample tube 47 correspond to the opening, then slide the handle 51 along the strip groove 50 to control the movement of the rectangular plate 49 to open the opening, then press the annular handle 16, the pressing sleeve 8 will start to move vertically downward with the fixing ring 10 and squeeze the first telescopic spring 9 in the spring sleeve 7, then the fixing ring 10 will start to squeeze the pressing block 11 to move outward through the connecting rod 13, and the pressing block 11 will push the holding tray 14 to move outward along the limiting groove, and at the same time, the holding tray 1 4 will begin to squeeze the two second telescopic springs 15. When the placing tray 14 moves to above the sampling plate 41, the sample cylinder 47 is rotated in any direction at this time to make the rectangular protrusion of the fixing handle 48 rotate along the first fixing groove 46 until it corresponds to the rectangular depression of the placement opening 45, and then the sample cylinder 47 is moved downward to between the two sampling plates 41. Then, the sample cylinder 47 is rotated in the same way to make the rectangular protrusion rotate 90° along the second fixing groove 42 to fix the sample cylinder 47. After this process is completed, the other components will automatically reset under the rebound action of the first telescopic spring 9 and the second telescopic spring 15.

[0040] A sampling platform 19 in contact with the switch component is provided on one side of the machine body 1 close to the switch component, an electric telescopic rod 20 is rotatably installed on the upper surface of the sampling platform 19, an installation cavity is provided in the sampling platform 19, a driving motor 21 is fixedly installed in the installation cavity, the output shaft of the driving motor 21 passes through the sampling platform 19, and is fixedly connected to the bottom end of the electric telescopic rod 20, a sliding rod 22 is fixedly installed on the side wall of the electric telescopic rod 20, an annular sleeve 23 is fixedly installed on the end of the sliding rod 22 away from the electric telescopic rod 20, a liquid storage tube 24 is fixedly installed in the annular sleeve 23, a liquid injection tube 25 is fixedly connected to the lower end of the liquid storage tube 24, and a liquid injection needle 26 is fixedly connected to the lower end of the liquid injection tube 25. A connected injection cavity 28 is provided inside the tube 24 and the injection tube 25, and a plurality of first injection ports 29 connected to the injection cavity 28 and distributed in a circumference are provided on the surface of the injection needle 26. A sampling needle 27 in contact with the injection needle is provided at the lower end of the injection needle 26. A sampling tube 30 is provided in the injection cavity 28, and two second injection ports 32 connected to the interior of the sampling tube 30 are provided in the sampling needle 27. The injection needle 26 is vertically slidably sleeved on the surface of the sampling tube 30, and the lower end of the sampling tube 30 is fixedly connected to the sampling needle 27. The upper end of the sampling tube 30 passes through the injection cavity 28 and a piston 33 is fixedly sleeved on the surface. The position of the piston 33 is adjusted by a positioning assembly.

[0041] The positioning assembly includes two second connecting columns 38 fixedly mounted on the upper surface of the piston 33, a grab ring 36, two slide grooves 34 opened on the side wall of the liquid storage tube 24, a sealing groove opened in the slide groove 34 and a sealing plate 35 vertically slidably installed in the sealing groove. The inner wall of the grab ring 36 is fixedly connected to the plurality of second connecting columns 38 through a first connecting column 37 horizontally penetrating the two sealing plates 35, and a vent hole 31 connected to the sealing groove is opened on the side wall of the liquid storage tube 24.

[0042] After the sample cylinder 47 is fixed on the sampling plate 41, the drive motor 21 is started, and the electric telescopic rod 20 is controlled to move the slide rod 22 downward, and finally the sampling needle 27 is placed at the bottle mouth of the sample cylinder 47, and then the grab ring 36 is moved downward to the bottom of the slide groove 34. At this time, the piston 33 will enter the injection cavity 28 until its upper surface coincides with the inner bottom wall of the liquid storage tube 24, completely blocking the injection cavity 28. The sampling needle 27 will also bring the sampling tube 30 deep into the sample cylinder 47 to extract the sample. The sample solution will enter the sampling tube 30 from the second injection port 32 and then enter the liquid storage tube 24 through the sampling tube 30 to complete the sampling. When the final sampling process is completed, the sampling needle 27 and the sample need to be cleaned. The cylinder 47 is cleaned. At this time, it is only necessary to move the grab ring 36 upwards to the top of the slide groove 34. At this time, the piston 33 will leave the injection chamber 28 and return to the liquid storage tube 24. At this time, the drive motor 21 is started to make the entire injection tube 25 enter the sample cylinder 47, and then the cleaning liquid is poured into the liquid storage tube 24. The cleaning liquid will flow along the injection chamber 28 and the sampling tube 30 into the multiple first injection ports 29 and the second injection ports 32 respectively, and finally converge into the sample cylinder 47. Not only can the inside of the sample cylinder 47 be cleaned, but also the residual sample solution in the sampling tube 30 and the second injection port 32 can be cleaned. When the water level in the sample cylinder 47 covers the sampling needle 27, the residual sample solution on its surface can also be cleaned.

[0043] A funnel-shaped waste liquid port 43 is provided on the upper surface of the sampling platform 19 and is located directly below the sampling needle 27. A waste liquid collection box 44 is fixedly mounted on the side wall of the sampling platform 19. The bottom of the waste liquid port 43 is connected to the waste liquid collection box 44 through a pipeline.

[0044] When the cleaning work is completed, the sampling plate 41 only needs to be rotated clockwise along the rotating sleeve 40 to dump the sample tube 47 so that the waste liquid after cleaning flows into the waste liquid port 43 and finally flows into the waste liquid collection box 44 through the pipeline.

[0045] A plurality of temperature controllers 52 are fixedly mounted on the inner bottom wall of the machine body 1 , and the plurality of temperature controllers 52 are used to adjust the temperature inside the machine body 1 .

[0046] By controlling the multiple temperature controllers 52, the temperature inside the body 1 can reach the required storage temperature and maintain a constant temperature state.

[0047] In the present invention, the rotating cap 6 is rotated to make the holding tray 14 correspond to the opening, and then the switch component is opened, and then the pressing component is used to make the pressing sleeve 8 and the fixing ring 10 start to move vertically downward and squeeze the first telescopic spring 9 in the spring sleeve 7, and then the fixing ring 10 will start to squeeze the pressing block 11 to move outward through the connecting rod 13, and the pressing block 11 will push the holding tray 14 to move outward along the limiting groove, and at the same time, the raised end of the holding tray 14 will start to squeeze the two second telescopic springs 15, when the holding tray 14 moves to the specified position, and then the clamping component is used to release the sample. After this process is completed, the other components will automatically reset under the rebound action of the first telescopic spring 9 and the second telescopic spring 15, which not only improves the efficiency of taking samples, but also eliminates the need to put hands into the holding device for taking, reducing the occurrence of sample container damage due to human error.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ion chromatograph sample holding device, comprising a body (1), characterized in that: A support column (2) is fixedly mounted on the bottom wall of the machine body (1); a turntable (3) is rotatably mounted on the upper surface of the support column (2); a circular notch is provided on the upper surface of the turntable (3); a pressure plate (4) is rotatably mounted in the circular notch; a through hole is provided on the upper surface of the machine body (1); a rotating shaft (5) is provided in the through hole; a rotating cap (6) with a special shape mark is fixedly mounted on one end of the rotating shaft (5); the other end passes through the pressure plate (4) and is fixedly connected to the turntable (3); A spring sleeve (7) is fixedly mounted on the upper surface of the pressure plate (4), a first telescopic spring (9) is arranged inside the spring sleeve (7), a pressing sleeve (8) is vertically slidably mounted in the through hole, the first telescopic spring (9) and the pressing sleeve (8) are both slidably sleeved on the surface of the rotating shaft (5), and the lower surface is in contact with the top of the first telescopic spring (9), a fixing ring (10) is fixedly sleeved on the surface of the pressing sleeve (8), a pressing component for pressing is arranged on the pressing sleeve (8), and the pressure plate ( 4) a through opening is provided on the surface, a pressing block (11) is horizontally slidably installed in the through opening, a rotating roller (12) is fixedly installed on the surface of the pressing block (11) and the fixed ring (10), a connecting rod (13) is rotatably installed between the two rotating rollers (12), a containing assembly distributed in a circumference is provided on the rotating disk (3), the containing assembly includes a limiting groove which is provided on the surface of the rotating disk (3) and the size of which matches the through opening, a containing disk (14) is horizontally slidably installed in the limiting groove, the Gaps are reserved between the two sides of the holding plate (14) and the side walls of the limiting groove, and a second telescopic spring (15) is provided in each of the two gaps, one end of which is fixedly connected to the side wall of the limiting groove and the other end of which is in contact with the protruding end of the holding plate (14). The holding plate (14) is provided with a clamping component for fixing the sample, and a spring rod (18) with a top end fixedly connected to the inner top wall of the body (1) is fixedly installed on the upper surface of the pressure plate (4), and a switch component for the sample to pass through is provided on the side wall of the body (1).

2. The ion chromatograph sample holding device according to claim 1, characterized in that: A sampling platform (19) in contact with the switch component is provided on one side of the machine body (1), and an electric telescopic rod (20) is rotatably mounted on the upper surface of the sampling platform (19). A mounting cavity is provided in the sampling platform (19), and a driving motor (21) is fixedly mounted in the mounting cavity. The output shaft of the driving motor (21) passes through the sampling platform (19) and is fixedly connected to the bottom end of the electric telescopic rod (20). A sliding rod (22) is fixedly mounted on the side wall of the electric telescopic rod (20), and an annular sleeve (23) is fixedly mounted on one end of the sliding rod (22) away from the electric telescopic rod (20). A liquid storage tube (24) is fixedly mounted in the annular sleeve (23), and a liquid injection tube (25) is fixedly connected to the lower end of the liquid storage tube (24), and a liquid injection needle (26) is fixedly connected to the lower end of the liquid injection tube (25). A liquid storage tube (24) and a liquid injection tube (25) are provided with a liquid injection cavity (28) connected to each other. The surface of the liquid injection needle (26) is provided with a plurality of first injection ports (29) connected to the liquid injection cavity (28) and distributed in a circumferential manner. A sampling needle (27) in contact with the liquid injection needle (26) is provided at the lower end. A sampling tube (30) is provided in the liquid injection cavity (28). Two second injection ports (32) connected to the inside of the sampling tube (30) are provided in the sampling needle (27). The liquid injection needle (26) is vertically slidably sleeved on the surface of the sampling tube (30). The lower end of the sampling tube (30) is fixedly connected to the sampling needle (27). The upper end of the sampling tube (30) passes through the liquid injection cavity (28) and a piston (33) is fixedly sleeved on the surface. The position of the piston (33) is adjusted by a position adjustment component.

3. The ion chromatograph sample holding device according to claim 2, characterized in that: The positioning assembly comprises two second connecting columns (38) fixedly mounted on the upper surface of the piston (33), a gripping ring (36), two slide grooves (34) provided on the side wall of the liquid storage tube (24), a sealing groove provided in the slide groove (34) and a sealing plate (35) vertically slidably mounted in the sealing groove. The inner wall of the gripping ring (36) is fixedly connected to the plurality of second connecting columns (38) via a first connecting column (37) horizontally penetrating the two sealing plates (35). The side wall of the liquid storage tube (24) is provided with a vent hole (31) connected to the sealing groove.

4. The ion chromatograph sample holding device according to claim 2, characterized in that: A sampling column (39) is fixedly mounted on the side wall of the electric telescopic rod (20), and the sampling column (39) is fixedly connected to a rotating sleeve (40). Two sampling plates (41) are rotatably mounted in the rotating sleeve (40), and a rubber ring for increasing the rotational friction force is provided in the rotating sleeve (40). A second fixing groove (42) is provided on the sides of the two sampling plates (41) that are close to each other.

5. The ion chromatograph sample holding device according to claim 2, characterized in that: The upper surface of the sampling platform (19) is provided with a funnel-shaped waste liquid port (43) located directly below the sampling needle (27); a waste liquid collection box (44) is fixedly mounted on the side wall of the sampling platform (19); and the bottom of the waste liquid port (43) is connected to the waste liquid collection box (44) via a pipeline.

6. The ion chromatograph sample holding device according to claim 1, characterized in that: The clamping component comprises a placement opening (45) opened in the middle of the containing plate (14), a first fixing groove (46) being opened in the placement opening (45), a sample cylinder (47) being arranged outside the rotating plate (3), and a fixing handle (48) matching the first fixing groove (46) being fixedly sleeved on the surface of the sample cylinder (47).

7. The ion chromatograph sample holding device according to claim 1, characterized in that: The switch component comprises an opening formed in a side wall of a machine body (1), a rectangular plate (49) being horizontally slidably mounted in the opening, a strip groove (50) being formed in the side wall of the machine body (1), a handle (51) being horizontally slidably mounted in the strip groove (50) and being fixedly connected to the rectangular plate (49).

8. The ion chromatograph sample holding device according to claim 1, characterized in that: The special shape mark comprises a cross-shaped protrusion on the rotating cap (6), and the cross-shaped protrusion corresponds to and matches the position of each containing tray (14).

9. The ion chromatograph sample holding device according to claim 1, characterized in that: The pressing component comprises an annular handle (16), and the surface of the pressing sleeve (8) is fixedly connected to the inner wall of the annular handle (16) via a plurality of fixing columns (17).

10. The ion chromatograph sample holding device according to claim 1, characterized in that: A plurality of temperature controllers (52) are fixedly mounted on the inner bottom wall of the machine body (1), and the plurality of temperature controllers (52) are used to adjust the temperature inside the machine body (1).

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