Ion chromatograph for detecting organic halogen

Abstract

The utility model discloses an ion chromatograph for organic halogen detection, which relates to the field of chromatographic instruments, and adopts the technical scheme that the ion chromatograph comprises a chromatographic instrument main body and a sample inlet arranged on the chromatographic instrument main body, a connecting frame is fixedly mounted on the outer side wall, close to the sample inlet, of the chromatographic instrument main body through an abutting part, and a containing cavity is formed in the top of the connecting frame. An injector filled with liquid to be detected is placed in the containing cavity, the needle head part of the injector is embedded into the sample inlet, the cylinder part of the injector is clamped and installed through the clamping assembly, meanwhile, the plunger rod part of the injector is close to the sample feeding mechanism, then the sample feeding mechanism is moved in the direction close to the chromatographic instrument body, and the injector is clamped and installed through the clamping assembly. According to the invention, the liquid in the injector can be pushed into the chromatograph main body at a constant speed until the sample feeding mechanism pushes and presses the plunger rod part of the injector, so that the liquid injection process of the injector is controlled, the injector does not need to be manually pushed and injected, and the energy of an operator when the injector is pushed and injected can be saved.

Description

Technical Field

[0001] This utility model relates to the field of chromatography instruments, and more specifically, to an ion chromatograph for the detection of organic halogens. Background Technology

[0002] Ion chromatography is a type of chromatographic instrument. Ion chromatography is a type of high-performance liquid chromatography, hence it is also called high-performance ion chromatography or modern ion chromatography. It differs from traditional ion exchange column chromatography mainly in that the resin has a high degree of cross-linking and a low exchange capacity. The injection volume is very small, and the eluent is delivered by a plunger pump. The eluent is usually monitored online automatically and continuously by conductivity. Ion chromatography is often used to detect organic halogens, which are one of the important indicators of water pollution. They come from chemical raw materials, pesticides, and the unreasonable discharge of dyeing and printing wastewater.

[0003] The current method involves using a syringe to inject the liquid to be tested into the ion chromatograph through the injection port located on the ion chromatograph for the detection and analysis of the organic halogen content in the liquid. However, since the injection is done manually, the operator may not be able to control the injection process and the amount injected after continuous injection. Furthermore, the operation is time-consuming and inconvenient for the operator.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an ion chromatograph for the detection of organic halogens.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an ion chromatograph for detecting organic halogens, comprising a chromatograph body and an injection port disposed on the chromatograph body, wherein a connecting frame is fixedly installed on the outer side wall of the chromatograph body near the injection port by means of an abutment member, the top of the connecting frame is provided with a receiving cavity, the side of the connecting frame near the injection port is open and communicates with the receiving cavity, a clamping component is disposed inside the receiving cavity corresponding to the injection port and used to clamp the syringe, and a sample delivery mechanism is slidably installed inside the receiving cavity, the sample delivery mechanism being used to move closer to or away from the clamping component by sliding along the axial direction of the injection port.

[0007] Preferably, the sample feeding mechanism includes a lead screw, a servo motor, and a sample feeding pusher plate. The axial direction of the lead screw is parallel to the axial direction of the sample inlet. The inner sidewall of the receiving cavity is provided with a rotating groove to accommodate the rotation of the lead screw. The output end of the servo motor passes through the connecting frame and is fixedly connected to one end of the lead screw. The sample feeding pusher plate is located inside the receiving cavity and has a protrusion integrally formed on one side. The protrusion is helically connected to the lead screw. The sample feeding pusher plate moves closer to or further away from the clamping assembly by moving along the axial direction of the sample inlet.

[0008] Preferably, the clamping assembly includes two frames arranged symmetrically from left to right and two arc-shaped clamping plates. The arc-shaped convex surfaces of the arc-shaped clamping plates are disposed on the frames. The two frames are slidably installed inside the connecting frame by means of a horizontal adjustment assembly. The two frames are slidably used to adjust the distance between the two arc-shaped clamping plates.

[0009] Preferably, the horizontal adjustment assembly includes a bidirectional threaded rod and two movable posts. The helical directions at both ends of the bidirectional threaded rod are opposite. The bottom surface of the connecting frame is provided with a receiving groove to accommodate the rotation of the bidirectional threaded rod. One end of the bidirectional threaded rod penetrates the side wall of the connecting frame. The two movable posts are respectively helically connected to both ends of the bidirectional threaded rod and are fixedly connected to the bottom of the frame.

[0010] Preferably, the arc-shaped clamping plate includes an upper clamping plate and a lower clamping plate arranged symmetrically. The cross-section of the frame is arranged in the shape of a U. The frame is rotatably installed with a vertically arranged bidirectional threaded rod II. The helical directions of the two ends of the bidirectional threaded rod II are opposite. The top end of the bidirectional threaded rod II penetrates through the top of the frame. The arc-shaped convex surface of the upper clamping plate and the arc-shaped convex surface of the lower clamping plate are both fixedly connected to sliding plates. The sliding plates on the upper clamping plate and the sliding plates on the lower clamping plate are respectively helically connected to the two ends of the bidirectional threaded rod II.

[0011] Preferably, the abutting component includes two abutting blocks, both of which are fixedly connected to the side of the chromatograph body near the injection port, and the abutting blocks are located below the injection port. The side wall of the connecting frame near the injection port is integrally formed with an installation part. Both abutting blocks abut against the bottom surface of the installation part, and the abutting blocks are fixedly installed to the installation part by bolts.

[0012] In summary, this utility model has the following beneficial effects: This solution involves installing a connecting frame on the outer wall of the chromatograph body near the injection port, and using a clamping assembly and a sample delivery mechanism located inside the connecting frame. The operator places a syringe containing the liquid to be tested into the receiving cavity, causing the needle of the syringe to embed into the injection port. The syringe barrel is clamped and installed by the clamping assembly, while the plunger rod of the syringe is located within the receiving cavity and close to the sample delivery mechanism. The sample delivery mechanism is then moved towards the chromatograph body until it pushes against the plunger rod of the syringe. At this time, the test liquid in the syringe barrel is squeezed and flows out from the needle of the syringe. The outflowing test liquid flows into the chromatograph body through the injection port for detection. By pushing the plunger rod of the syringe through the sample delivery mechanism, the liquid inside the syringe can be pushed and injected into the chromatograph body at a uniform speed. The injection process of the syringe can be controlled, and there is no need for manual injection of the syringe, which can save the operator's effort when injecting the syringe. In addition, during the process of pushing the syringe through the sample delivery mechanism, the syringe barrel is clamped and installed by the clamping component, which can improve the stability of the syringe when injecting liquid. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is an exploded view of the chromatograph body and the connecting frame in this utility model;

[0015] Figure 3 for Figure 2 Enlarged schematic diagram of part A;

[0016] Figure 4 This is a cross-sectional view of the connecting frame in this utility model;

[0017] Figure 5 This is a schematic diagram of the clamping component and the movable pile in this utility model.

[0018] In the diagram: 1. Chromatograph body; 2. Inlet; 3. Connecting frame; 4. Receiving cavity; 5. Clamping assembly; 501. Frame; 502. Arc-shaped clamping plate; 5021. Upper clamping plate; 5022. Lower clamping plate; 6. Sample delivery mechanism; 601. Lead screw; 602. Servo motor; 603. Sample delivery push plate; 7. Rotary groove; 8. Protrusion; 9. Horizontal adjustment assembly; 901. Bidirectional threaded rod one; 902. Moving stake; 10. Receiving groove; 11. Bidirectional threaded rod two; 12. Slide plate; 13. Abutment block; 14. Mounting part. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Example:

[0021] An ion chromatograph for the detection of organic halogens, such as Figures 1 to 5 As shown, the chromatograph includes a main body 1 and an injection port 2 on the main body 1. A connecting frame 3 is fixedly installed on the outer wall of the main body 1 near the injection port 2 via an abutment. A receiving cavity 4 is provided on the top of the connecting frame 3. The side of the connecting frame 3 near the injection port 2 is open and communicates with the receiving cavity 4. A clamping assembly 5, corresponding to the injection port 2 and used to clamp the syringe, is installed inside the receiving cavity 4. A sample delivery mechanism 6 is slidably installed inside the receiving cavity 4. The sample delivery mechanism 6 moves closer to or away from the clamping assembly 5 by sliding along the axial direction of the injection port 2. The sample delivery mechanism 6 includes a lead screw 601, a servo motor 602, and a feed mechanism 6. The sample pusher plate 603 and the lead screw 601 are axially parallel to each other with the sample inlet 2. The inner wall of the receiving cavity 4 is provided with a rotating groove 7 to accommodate the rotation of the lead screw 601. The output end of the servo motor 602 passes through the connecting frame 3 and is welded to one end of the lead screw 601. The sample pusher plate 603 is located inside the receiving cavity 4 and has a protrusion 8 integrally formed on one side. The protrusion 8 and the sample pusher plate 603 are supported by injection molding. The protrusion 8 is screw-driven and connected to the lead screw 601. A threaded groove is provided on the protrusion 8 for cooperating with the lead screw 601. The sample pusher plate 603 moves along the axial direction of the sample inlet 2 to approach or move away from the clamping assembly 5.

[0022] The clamping assembly 5 includes two symmetrically arranged frames 501 and two arc-shaped clamping plates 502. The arc-shaped convex surfaces of the arc-shaped clamping plates 502 are mounted on the frames 501. The two frames 501 are slidably mounted inside the connecting frame 3 via a horizontal adjustment assembly 9. The two frames 501 are slidably used to adjust the distance between the two arc-shaped clamping plates 502. The horizontal adjustment assembly 9 includes a bidirectional threaded rod 901 and two movable posts 902. The helical directions at both ends of the bidirectional threaded rod 901 are opposite. The bottom surface of the connecting frame 3 has a receiving groove 10 to accommodate the rotation of the bidirectional threaded rod 901. One end of the bidirectional threaded rod 901 passes through the side wall of the connecting frame 3. The two movable posts 902 are helically connected to both ends of the bidirectional threaded rod 901. The movable posts 902 have threaded grooves 1 for engaging with the ends of the bidirectional threaded rod 901. The bottom of the movable posts 902 is located in the receiving groove 1. Within 0, and the movable pile 902 is bonded to the bottom of the frame 501, the arc-shaped clamping plate 502 includes an upper clamping plate 5021 and a lower clamping plate 5022 arranged symmetrically. The arc-shaped concave surface of the upper clamping plate 5021 and the arc-shaped concave surface of the lower clamping plate 5022 are close to each other. The cross section of the frame 501 is arranged in the shape of a U. Inside the frame 501, a vertically arranged bidirectional threaded rod 11 is rotatably installed. The spiral directions at both ends of the bidirectional threaded rod 11 are opposite. The top end of the bidirectional threaded rod 11 penetrates the top of the frame 501. Slide plates 12 are bonded to the arc-shaped convex surface of the upper clamping plate 5021 and the arc-shaped convex surface of the lower clamping plate 5022. The slide plates 12 on the upper clamping plate 5021 and the slide plates 12 on the lower clamping plate 5022 are respectively spirally connected to the two ends of the bidirectional threaded rod 11. The upper clamping plate 5021 and the lower clamping plate 5022 are both provided with threaded grooves 3 for cooperating with the ends of the bidirectional threaded rod 11.

[0023] The contact component includes two contact blocks 13, both of which are bonded to the side of the chromatograph body 1 near the injection port 2 and are located below the injection port 2. The side wall of the connecting frame 3 near the opening of the injection port 2 is integrally formed with an installation part 14. The installation part 14 and the connecting frame 3 are made by injection molding. Both contact blocks 13 abut against the bottom surface of the installation part 14 and are fixedly installed with bolts. Both the contact blocks 13 and the installation part 14 are provided with threaded holes for bolt connection.

[0024] The operator brings the mounting part 14 into contact with the top surfaces of the two contact blocks 13. At this time, the threaded holes on the contact blocks 13 and the mounting part 14 are coaxial. Then, the bolts are installed in the threaded holes on the contact blocks 13 and the mounting part 14 respectively, so that the connecting frame 3 can be easily installed on the chromatograph body 1 for use. When the chromatograph body 1 needs to be transported or stored, the bolts are removed to make it separate from the threaded holes on the contact blocks 13 and the mounting part 14 respectively. Then, by moving the mounting part 14 so that it does not abut against the two contact blocks 13, the connecting frame 3 can be removed from the chromatograph body 1 and placed on the top of the chromatograph body 1 to reduce the space occupied during transportation or storage.

[0025] When the bolts are connected to the threaded holes on the mounting part 14 and the contact block 13 respectively, so that the connecting frame 3 is installed on the chromatograph body 1, the clamping assembly 5 corresponds to the injection port 2. The operator holds the end of the bidirectional threaded rod 901 outside the receiving cavity 4 and rotates it clockwise. At this time, the bidirectional threaded rod 901 rotates in the receiving groove 10. Because the helical directions of the two ends of the bidirectional threaded rod 901 are opposite, and the two moving posts 902 are respectively connected to the two ends of the bidirectional threaded rod 901 by helical drive, the bidirectional threaded rod 901 rotates clockwise. When threaded rod 901 rotates clockwise, the two movable posts 902 move horizontally along the double-sided threaded rod 901 and approach each other. When the two movable posts 902 approach each other, they can drive the two frames 501 and the arc-shaped clamps 502 installed on the frames 501 to approach each other, so that the distance between the two upper clamps 5021 and the distance between the two lower clamps 5022 gradually decreases. By holding the two double-sided threaded rods 11 located at the top outside the frames 501 and rotating them clockwise, because the top and bottom of the double-sided threaded rods 11... The spiral directions are opposite, and the sliding plates 12 on the upper clamping plate 5021 and the lower clamping plate 5022 are respectively spirally connected to the top and bottom of the double-threaded rod 11. This causes the sliding plates 12 on the upper clamping plate 5021 and the lower clamping plate 5022 to move vertically along the double-threaded rod 11 and approach each other when the double-threaded rod 11 rotates clockwise. This gradually reduces the distance between the upper clamping plate 5021 and the lower clamping plate 5022 on the frame 501, which can be used to clamp and install... For syringes with smaller tube diameters, rotating the double-threaded rod 901 counterclockwise can move the two movable posts 902, the two frames 501, and the two arc-shaped clamping plates 502 away from each other, thereby increasing the distance between the two upper clamping plates 5021 and the two lower clamping plates 5022. By manually rotating the double-threaded rod 11 counterclockwise, the upper clamping plates 5021 and the lower clamping plates 5022 are moved away from each other, thereby increasing the distance between the upper clamping plates 5021 and the lower clamping plates 5022. This method can be used to clamp and install syringes with larger tube diameters.

[0026] The operator places the syringe containing the liquid to be tested into the receiving cavity 4, so that the needle part of the syringe is embedded in the sample inlet 2, and the syringe barrel is clamped and installed by the clamping assembly 5, so that the syringe barrel abuts against the arc-shaped concave surfaces of the two upper clamping plates 5021 and the two lower clamping plates 5022, so that the syringe barrel is stably clamped and installed in the receiving cavity 4. At this time, the plunger part of the syringe is located in the receiving cavity 4 and close to the sample delivery push plate 603. Then, by starting the servo motor 602 and driving the lead screw 601 to rotate clockwise, the lead screw 601 rotates inside the rotating groove 7. When the lead screw 601 rotates clockwise, it drives the protrusion 8 and the sample delivery push plate 603 to move along the axial direction of the sample inlet 2 and toward the clamping assembly 5, until the sample delivery push plate 603... The syringe plunger rod is pressed against the syringe barrel, and the liquid to be tested inside the syringe barrel is squeezed and flows out from the syringe needle. The liquid to be tested flows into the chromatograph body 1 through the injection port 2 for detection. By moving the sample delivery plate 603 towards the clamping assembly 5 and pressing the plunger rod of the syringe, the liquid in the syringe can be pushed at a uniform speed and injected into the chromatograph body 1 at a uniform speed through the injection port 2 to detect the content of organic halogens in the liquid. The injection process of the syringe can be controlled, and there is no need to manually push the syringe, which can save the operator's effort when pushing the syringe. In addition, during the process of the sample delivery mechanism 6 pushing the syringe, the clamping assembly 5 clamps and installs the syringe barrel, which can improve the stability of the syringe when injecting liquid.

[0027] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An ion chromatograph for detecting organic halogens, comprising a chromatograph main body (1) and a sample inlet (2) provided on the chromatograph main body (1), characterized in that: The chromatograph body (1) is fixedly installed with a connecting frame (3) on the outer side wall close to the sample inlet (2) through a stopper, an accommodating cavity (4) is formed in the top of the connecting frame (3), one side of the connecting frame (3) close to the sample inlet (2) is provided with an opening and communicates with the accommodating cavity (4), a clamping assembly (5) for clamping a syringe is arranged in the accommodating cavity (4) and corresponds to the sample inlet (2), and a sample feeding mechanism (6) is slidably arranged in the accommodating cavity (4) and is used for approaching or moving away from the clamping assembly (5) by sliding along the sample inlet (2) in the axial direction.

2. The ion chromatograph for detection of organic halogens according to claim 1, characterized by: The sample feeding mechanism (6) comprises a lead screw (601), a servo motor (602) and a sample feeding push plate (603), the lead screw (601) is axially parallel to the sample inlet (2), a rotating groove (7) for accommodating rotation of the lead screw (601) is formed in the inner side wall of the accommodating cavity (4), the output end of the servo motor (602) penetrates through the connecting frame (3) and is fixedly connected with one end of the lead screw (601), the sample feeding push plate (603) is arranged in the accommodating cavity (4) and one side of the sample feeding push plate (603) is integrally formed with a protruding portion (8), the protruding portion (8) is screw transmission connected with the lead screw (601), and the sample feeding push plate (603) is used for approaching or moving away from the clamping assembly (5) by moving along the sample inlet (2) in the axial direction.

3. The ion chromatograph for detection of organic halogens according to claim 2, characterized by: The clamping assembly (5) comprises two frame (501) arranged symmetrically left and right and two arc-shaped clamping plates (502), the arc-shaped convex surface of the arc-shaped clamping plate (502) is arranged on the frame (501), the two frame (501) are slidably arranged in the connecting frame (3) through a horizontal adjusting assembly (9), and the two frame (501) are used for adjusting the distance between the two arc-shaped clamping plates (502) by sliding.

4. The ion chromatograph for detection of organic halogens according to claim 3, characterized by: The horizontal adjusting assembly (9) comprises a bidirectional screw rod (901) and two moving piles (902), the screw lines on the two ends of the bidirectional screw rod (901) are opposite in direction, an accommodating groove (10) for accommodating rotation of the bidirectional screw rod (901) is formed in the bottom surface of the connecting frame (3), one end of the bidirectional screw rod (901) penetrates through the side wall of the connecting frame (3), the two moving piles (902) are screw transmission connected with the two ends of the bidirectional screw rod (901) respectively, and the moving piles (902) are fixedly connected with the bottom of the frame (501).

5. The ion chromatograph for detection of organic halogens according to claim 3, characterized by: The arc-shaped clamping plate (502) comprises an upper clamping plate (5021) and a lower clamping plate (5022) arranged symmetrically, the frame (501) is in the shape of a Chinese character 'fang', a double-threaded rod (11) is rotatably arranged inside the frame (501) and vertically, the screw directions of the two ends of the double-threaded rod (11) are opposite, the top end of the double-threaded rod (11) penetrates through the top of the frame (501), the arc-shaped convex surface of the upper clamping plate (5021) and the arc-shaped convex surface of the lower clamping plate (5022) are fixedly connected with a sliding plate (12), and the sliding plates (12) on the upper clamping plate (5021) and the lower clamping plate (5022) are respectively screw transmission connected to the two ends of the double-threaded rod (11).

6. The ion chromatograph for detection of organic halogens according to claim 1, characterized by: The contact piece comprises two contact blocks (13), the two contact blocks (13) are fixedly connected to one side of the chromatograph main body (1) close to the sample inlet (2), the contact blocks (13) are located below the sample inlet (2), the connecting frame (3) is integrally formed with a mounting portion (14) on the side wall close to the opening of the sample inlet (2), the two contact blocks (13) are in contact with the bottom surface of the mounting portion (14), and the contact blocks (13) and the mounting portion (14) are fixedly installed through bolts.

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