Chromatograph sample introduction mechanism

Abstract

The utility model discloses a sample introduction mechanism of a chromatographic instrument, and belongs to the technical field of medical instruments. Comprising a chromatographic instrument, a sample injection port is formed in the chromatographic instrument, a sample injection mechanism is arranged on the sample injection port, the sample injection mechanism comprises a sleeve, a sliding groove is formed in the sleeve, a sliding block is arranged in the sliding groove, a threaded rod is arranged on the sleeve, the threaded rod extends into the sliding groove, and the threaded rod penetrates through the sliding block and is in threaded connection with the sliding block; a connecting block is arranged on the sliding block, a clamping structure is arranged on the connecting block, a sample injection pipe is fixedly connected to the connecting block, a push rod is arranged in the sample injection pipe, a sample injection needle is arranged at the end, away from the push rod, of the sample injection pipe, and the sample injection needle extends to the outer side of the sleeve. According to the utility model, the insertion depth of the sample injection needle can be adjusted by rotating the threaded rod, and the sample injection needle can be accurately inserted to a proper depth, so that the condition that a sample enters a chromatographic instrument during sample injection each time is consistent, and the experimental data is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of chromatograph sample introduction mechanism, belong to medical instrument technical field. BACKGROUND

[0002] Chromatograph is the device for chromatographic analysis, including detection device, record and data processing analysis, with sensitive, high degree of automation characteristics, is widely applied in chemical products.The sample introduction mechanism of common in sample introduction, since the depth of insertion of sample introduction needle at sample inlet cannot be controlled, the position and state of sample entering chromatograph will have difference with different insertion depth of sample introduction needle, and it is easy to cause the bending and damage of chromatographic sample injector, affect experimental operation. UTILITY MODEL CONTENT

[0003] The utility model solves the technical problems in the prior art that the depth of insertion of sample introduction needle at sample inlet cannot be controlled, the position and state of sample entering chromatograph will have difference with different insertion depth of sample introduction needle, and it is easy to cause the bending and damage of chromatographic sample injector, affect experimental operation.

[0004] The technical problems solved by the utility model are solved by the following technical solutions: a kind of chromatograph sample introduction mechanism, including chromatograph, chromatograph is provided with sample inlet, sample inlet is provided with sample introduction mechanism, sample introduction mechanism includes sleeve, sliding slot is opened in sleeve, sliding block is arranged in sliding slot, threaded rod is arranged on sleeve, threaded rod extends to the inside of sliding slot, threaded rod penetrates sliding block and is connected with sliding block by screw thread, connecting block is arranged on sliding block, clamping structure is arranged on connecting block, clamping structure is used to limit connecting block, sample introduction tube is fixedly connected on connecting block, push rod is arranged in sample introduction tube, sample introduction needle is arranged on the end of sample introduction tube away from push rod, sample introduction needle extends to the outside of sleeve.

[0005] By adopting the above technical scheme, first, sleeve is connected with the sample inlet of chromatograph, then sample introduction tube drives connecting block to insert into the inside of sleeve, at this time, connecting block and sliding block are clamped and limited by clamping structure, then sliding block moves in sliding slot by rotating threaded rod, then connecting block moves by sliding block, then sample introduction tube moves by connecting block, then sample introduction needle moves by sample introduction tube, so that sample introduction needle is inserted into sample inlet, then push rod is pressed to transport sample into chromatograph by sample introduction needle;The insertion depth of sample introduction needle can be adjusted by rotating threaded rod, sample introduction needle is accurately inserted to appropriate depth, which can ensure that the conditions of sample entering chromatograph are consistent every time, make experimental data more stable, also can avoid bending and damage of sample introduction needle due to insertion too deep, affect experimental results, ensure the accuracy of experimental operation, improve the service life of device.

[0006] The utility model further sets up: the clamping structure includes the limit slot of setting up on the connecting block, the limit slot inside is provided with the clamping block, the first spring is provided between the clamping block and the positioning channel, the elastic force direction of first spring is same with the sliding direction of clamping block, the clamping groove is seted up on the sliding block, the clamping groove penetrates the sliding block, the clamping block is inserted with the clamping groove.

[0007] Through adopting the above technical scheme, when installing the sample injection tube, the connecting block and the sliding block are in contact and slide, the connecting block extrudes the clamping block through the sliding block in the sliding process, so that the clamping block slides in the limit slot, the clamping block compresses the first spring in the sliding process, when the clamping block slides to the side corresponding to the clamping groove, the clamping block is moved to the clamping groove direction through the reset of the first spring at this time, so that the clamping block is inserted into the clamping groove, thereby realizing the limiting and fixing of the sample injection tube.

[0008] The utility model further sets up: the sleeve is seted up the through groove with the sliding groove intercommunication, the through groove is provided with the pointer, the pointer is fixedly connected with the sliding block, the side of the sleeve is marked with the scale with the through groove intercommunication.

[0009] Through adopting the above technical scheme, when the sliding block moves, the pointer moves in the through groove synchronously, the sample injection needle depth can be accurately controlled by observing the position of the pointer stopping at the scale, and the sample injection needle is prevented from being damaged.

[0010] The utility model further sets up: the sleeve is seted up the guide groove, the guide block is fixedly seted up on the sample injection tube, and the guide block is slidably arranged in the guide groove.

[0011] Through adopting the above technical scheme, when the sample injection tube moves, the sample injection tube is further limited and guided by the sliding of the guide block in the guide groove, so that the sample injection tube is prevented from deviating when moving.

[0012] The utility model further sets up: the sleeve is seted up the positioning channel with the sliding groove intercommunication, the positioning channel position corresponds with the clamping groove position, the positioning channel is provided with the push structure, and the push structure is used for pushing the clamping block.

[0013] Through adoption of the above technical scheme, after sample injection is completed, the clamping groove on the sliding block is moved to a position corresponding to the positioning channel, then the push plate is pressed to slide in the positioning channel, the push plate drives the positioning plate to slide in the positioning groove in the sliding process, the positioning plate compresses the second spring in the moving process, so that the push plate is inserted into the clamping groove, the push plate drives the clamping block to move away from the clamping groove, the separation of the clamping block and the clamping groove is completed, then the sample injection tube can be taken out.

[0014] The utility model further sets up: sleeve is provided with connecting seat, connecting seat is connected with the sample injection port of chromatograph, the connecting place of connecting seat and sample injection port is provided with through hole, the path of sample injection needle passes through through hole, be provided with rubber sealing washer on through hole, rubber sealing washer is used for shielding sample injection needle, sleeve is provided with the clearance channel of communication with connecting seat, clearance channel is hinged with baffle.

[0015] Through adoption of the above technical scheme, through connecting seat and chromatograph body sample injection port connection, firm installation sample injection mechanism, when sample injection needle is taken out after sample injection is completed, the connecting seat and chromatograph sample injection port between sealing is sealed through rubber sealing washer, prevent sample injection needle from leaking sample drop in the moving in sample injection port, so that influence next detection result: through opening baffle, staff can help small brush or cleaning cotton swab etc, through clearance channel goes in connecting seat inner wall, the sample that can remain is cleaned up.

[0016] The utility model discloses the beneficial effect is: first sleeve is connected with the sample injection port of chromatograph, then drives connecting block and inserts into the inside of sleeve with sample injection tube, when connecting block and sliding block are clamped and positioned through the clamping structure, then sliding groove is moved to the sliding block through the rotation screw rod, then connecting block is moved to the sliding block, then connecting block drives sample injection tube to move, then sample injection tube drives sample injection needle to move, so that sample injection needle is inserted into sample injection port, then the sample is sent to chromatograph through sample injection needle by pushing rod, through the rotation screw rod, the insertion depth of sample injection needle can be adjusted, sample injection needle is accurately inserted to the depth of suitability, can guarantee that the condition of sample into chromatograph is consistent when every time sample injection, makes experimental data more stable, still can avoid because insertion is too deep or to sample injection needle causes the bending damage of damage, influence experimental result, guarantee the accuracy of experimental operation, improve the service life of device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0018] Figure 2 It is the sectional view three-dimensional schematic diagram of the utility model;

[0019] Figure 3 It is the sliding block three-dimensional schematic diagram of the utility model;

[0020] Figure 4 It is the three-dimensional schematic view of the sample inlet tube of the utility model;

[0021] Figure 5 It is the sectional view schematic view of the sleeve of the utility model;

[0022] Figure 6 It is the sectional view schematic view of the sleeve of the utility model; Figure 5 It is the enlarged schematic view of A in the middle;

[0023] Figure 7 It is the sectional view three-dimensional schematic view of the sleeve of the utility model;

[0024] Figure 8 It is the sectional view three-dimensional schematic view of the sleeve of the utility model; Figure 7 It is the enlarged schematic view of A in the middle.

[0025] In the drawing: 1, sleeve; 2, sliding block; 3, threaded rod; 4, connecting block; 5, sample inlet tube; 6, sample needle; 101, sliding groove; 102, cavity structure; 301, rotating block; 501, push rod; 701, limiting groove; 702, clamping block; 703, first spring; 704, clamping groove; 801, through slot; 802, pointer; 803, scale; 901, guide groove; 902, guide block; 1011, positioning channel; 1021, push plate; 1022, positioning groove; 1023, positioning plate; 1024, second spring; 1031, connecting seat; 1032, rubber sealing gasket; 1033, cleaning through slot; 1034, baffle. DETAILED DESCRIPTION

[0026] In order to make the technical means, creation characteristics, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific drawings.

[0027] For example, Figure 1 And Figure 2As shown, a chromatograph injection mechanism includes a chromatograph with an injection port and an injection mechanism. The injection mechanism includes a sleeve 1, which is a through-hole cavity structure 102. A sliding groove 101 is formed on the sleeve 1, connecting to the cavity structure 102. A sliding block 2 is disposed within the sliding groove 101, and the sliding block 2 reciprocates along the opening direction of the cavity structure 102. A threaded rod 3 is provided on the sleeve 1, with one end of the threaded rod 3 penetrating the sleeve 1 and fixedly mounted with a rotating block 301. The rotating block 301 allows for convenient adjustment of the threaded rod 3 by the operator. The extension direction of the threaded rod 3 is the same as the penetration direction of the cavity structure 102. The end of the upper part away from the rotating block 301 extends into the interior of the sliding groove 101 and is rotatably set with the sliding groove 101. The threaded rod 3 passes through the sliding block 2 and is threadedly connected to the sliding block 2. A connecting block 4 is provided on the sliding block 2. A snap-fit ​​structure is provided on the connecting block 4. The snap-fit ​​structure is used to limit the sliding block 2 and the connecting block 4. A sample inlet tube 5 is fixedly connected to the side of the connecting block 4 away from the sliding block 2. One end of the sample inlet tube 5 is inserted into the cavity structure 102. A push rod 501 is slidably set at the end of the sample inlet tube 5 away from the sleeve 1. A sample inlet needle 6 is fixedly set at the other end of the sample inlet tube 5. The extension direction of the sample inlet needle 6 is the same as the penetration direction of the cavity structure 102. The sample inlet needle 6 extends to the outside of the sleeve 1.

[0028] like Figure 6 As shown, the snap-fit ​​structure includes a limiting groove 701 formed on the connecting block 4. The limiting groove 701 is formed on opposite sides of the connecting block 4. A snap-fit ​​block 702 is provided inside the limiting groove 701. A first spring 703 is provided between the snap-fit ​​block 702 and the limiting groove 701. The elastic force direction of the first spring 703 is the same as the sliding direction of the snap-fit ​​block 702. A snap-fit ​​groove 704 is formed on the sliding block 2. The snap-fit ​​block 702 and the snap-fit ​​groove 704 are inserted into each other.

[0029] like Figure 2 As shown, the sleeve 1 has a through groove 801 that communicates with the sliding groove 101. A pointer 802 is slidably disposed in the through groove 801. The pointer 802 is fixedly connected to the sliding block 2. The pointer 802 is fixedly disposed on the side of the sliding block 2 away from the connecting block 4. The sleeve 1 has a scale 803 marked on the same side as the through groove 801.

[0030] like Figure 2 As shown, a guide groove 901 is provided on the sleeve 1, and a guide block 902 is provided on the side of the sample inlet tube 5 away from the connecting block 4. The guide block 902 is slidably disposed inside the guide groove 901. The guide block 902 slides along the opening direction of the guide groove 901, and the guide block 902 and the sample inlet tube 5 move synchronously.

[0031] like Figure 8As shown, the sleeve 1 is provided with a positioning channel 1011 communicated with the sliding groove 101, the positioning channel 1011 is provided on one side of the sleeve 1 adjacent to the through groove 801, the position of the positioning channel 1011 corresponds to the position of the clamping groove 704, the area of the positioning channel 1011 is same as the area of the clamping groove 704, the positioning channel 1011 is provided with a pushing structure, the pushing structure is used for pushing the clamping block 702. The pushing structure comprises a push plate 1021, the push plate 1021 is slidingly arranged in the inside of the positioning channel 1011, the push plate 1021 reciprocally slides along the extension direction of the positioning channel 1011, the inner wall of the positioning channel 1011 is provided with a positioning groove 1022, the positioning groove 1022 is slidingly provided with a positioning plate 1023, the positioning plate 1023 and the push plate 1021 move synchronously, the positioning plate 1023 and the positioning groove 1022 are provided with a second spring 1024, the elastic force direction of the second spring 1024 is same as the sliding direction of the push plate 1021, one end of the push plate 1021 can slide to the inside of the clamping groove 704 and abut against the clamping block 702, the other end of the push plate 1021 extends to the outside of the sleeve 1.

[0032] As shown, Figure 2 The sleeve 1 is provided with a connecting seat 1031 on one side of the cavity structure 102 in the through direction, the connecting seat 1031 is connected with the sample inlet of the chromatograph, the connecting place of the connecting seat 1031 and the sample inlet is provided with a through hole communicated with the cavity structure 102, the path of the sampling needle 6 passes through the through hole, the through hole is provided with a rubber sealing gasket 1032, the rubber sealing gasket 1032 is used for shielding the sampling needle 6, the sleeve 1 is provided with a cleaning through groove 1033 communicated with the cavity structure 102, the cleaning through groove 1033 is hinged with a baffle 1034 on the same face of the push plate 1021.

[0033] Firstly, the sleeve 1 is connected with the sample inlet of the chromatograph, then the connecting block 4 is inserted into the inside of the sleeve 1 by the sampling tube 5, at this time, the connecting block and the sliding block 2 are clamped and limited by the clamping structure, then the sliding block 2 is moved in the sliding groove 101 by rotating the threaded rod 3, then the connecting block 4 is moved by the sliding block 2, then the sampling tube 5 is moved by the connecting block 4, then the sampling needle 6 is moved by the sampling tube 5, so that the sampling needle 6 is inserted into the sample inlet, then the sample is transported into the chromatograph through the sampling needle 6 by pressing the push rod 501; the insertion depth of the sampling needle 6 can be adjusted by rotating the threaded rod 3, the sampling needle 6 is accurately inserted to the appropriate depth, which can ensure that the sample enters the chromatograph under the same condition every time, so that the experimental data is more stable, and the insertion depth is too deep or the sampling needle 6 is bent and damaged, which can affect the experimental results, so that the accuracy of the experimental operation is ensured, and the service life of the device is improved.

[0034] When the sample injection tube 5 is installed, the connecting block 4 is in contact with the sliding block 2, and the connecting block 4 is extruded to the clamping block 702 through the sliding block 2 during the sliding process, so that the clamping block 702 slides in the limiting groove 701, and the clamping block 702 is compressed to the first spring 703 during the sliding process; when the clamping block 702 slides to the side corresponding to the clamping groove 704, the clamping block 702 is pushed to the clamping groove 704 direction by the first spring 703 reset at this time, so that the clamping block 702 is inserted into the clamping groove 704, thereby limiting and fixing the sample injection tube 5.

[0035] When the sliding block 2 moves, the pointer 802 is driven to move in the through groove 801, the depth of the sample injection needle 6 can be accurately controlled by observing the position of the pointer 802 stopping at the scale 803, and the sample injection needle 6 is prevented from being damaged.

[0036] When the sample injection tube 5 moves, the guiding block 902 is further guided in the guiding groove 901, so that the sample injection tube 5 is prevented from deviating when moving.

[0037] After the sample injection is completed, the clamping groove 704 on the sliding block 2 is moved to the position corresponding to the positioning channel 1011, and then the push plate 1021 is pressed to slide in the positioning channel 1011, the push plate 1021 drives the positioning plate 1023 to slide in the positioning groove 1022 during the sliding process, and the positioning plate 1023 is compressed to the second spring 1024 during the movement, so that the push plate 1021 is inserted into the clamping groove 704, and the push plate 1021 pushes the clamping block 702 to move away from the clamping groove 704, that is, the separation of the clamping block 702 and the clamping groove 704 is completed, and then the sample injection tube 5 is taken out.

[0038] The connecting seat 1031 is connected with the sample inlet of the chromatograph body, the sample injection mechanism is stably installed, after the sample injection needle is taken out after the sample injection is completed, the connecting seat 1031 and the sample inlet of the chromatograph are sealed by the rubber sealing gasket 1032, so that the sample injection needle 6 is prevented from leaking and dropping on the sample inlet when moving, thereby affecting the detection result of the next time; by opening the baffle 1034, the worker can clean the sample that may be left by cleaning the through groove 1033 in the inner wall of the connecting seat 1031 by means of a small brush or a cleaning cotton swab.

[0039] The basic principle, main features and advantages of the utility model are shown and described. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and various changes and improvements can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A chromatograph sample introduction mechanism, comprising a chromatograph and a sample introduction mechanism, the chromatograph is provided with a sample introduction port, the sample introduction mechanism is provided on the sample introduction port, characterized in that: The sample injection mechanism includes a sleeve (1), a sliding groove (101) is formed in the sleeve (1), a sliding block (2) is arranged in the sliding groove (101), a threaded rod (3) is arranged on the sleeve (1), the threaded rod (3) extends into the sliding groove (101), the threaded rod (3) penetrates through the sliding block (2) and is threadedly connected with the sliding block (2), a connecting block (4) is arranged on the sliding block (2), a clamping structure is arranged on the connecting block (4), the clamping structure is used for limiting the sliding block (2) and the connecting block (4), the connecting block (4) is fixedly connected with a sample injection tube (5), a push rod (501) is arranged in the sample injection tube (5), a sample injection needle (6) is arranged at an end of the sample injection tube (5) away from the push rod (501), and the sample injection needle (6) extends to the outside of the sleeve (1).

2. A sample introduction mechanism for a chromatograph according to claim 1, characterized in that: The clamping structure includes a limiting groove (701) formed in the connecting block (4), a clamping block (702) is arranged in the limiting groove (701), a first spring (703) is arranged between the clamping block (702) and the limiting groove (701), the elastic force direction of the first spring (703) is the same as the sliding direction of the clamping block (702), a clamping groove (704) is formed in the sliding block (2), the clamping groove (704) penetrates through the sliding block (2), and the clamping block (702) is inserted into the clamping groove (704).

3. A sample introduction mechanism for a chromatograph as defined in claim 1, wherein: A through groove (801) in communication with the sliding groove (101) is formed in the sleeve (1), a pointer (802) is arranged in the through groove (801), and the pointer (802) is fixedly connected with the sliding block (2).

4. A sample introduction mechanism for a chromatograph as defined in claim 1, wherein: A guide groove (901) is formed in the sleeve (1), and a guide block (902) is fixedly arranged on the sample injection tube (5) and slidably arranged in the guide groove (901).

5. A chromatograph sample introduction mechanism as defined in claim 1, wherein: A positioning channel (1011) in communication with the sliding groove (101) is formed in the sleeve (1), the positioning channel (1011) is located in a position corresponding to the position of the clamping groove (704), and a pushing structure is arranged in the positioning channel (1011) and used for pushing the clamping block (702).

6. A sample introduction mechanism for a chromatograph as defined in claim 5, wherein: The pushing structure includes a push plate (1021) slidably arranged in the positioning channel (1011), a positioning groove (1022) is formed in the inner wall of the positioning channel (1011), a positioning plate (1023) is slidably arranged in the positioning groove (1022), a second spring (1024) is arranged between the positioning plate (1023) and the positioning groove (1022), the elastic force direction of the second spring (1024) is the same as the sliding direction of the push plate (1021), and one end of the push plate (1021) can slide into the clamping groove (704) and abut against the clamping block (702).

7. A sample introduction mechanism for a chromatograph as defined in claim 1, wherein: The sleeve (1) is provided with a connecting seat (1031) connected with a sample inlet on the chromatograph, a through hole is formed at the connecting position of the connecting seat (1031) and the sample inlet, the path of the sample needle (6) passes through the through hole, a rubber sealing gasket (1032) is arranged on the through hole, the rubber sealing gasket (1032) is used for shielding the sample needle (6), and a cleaning through slot (1033) in communication with the connecting seat (1031) is formed on the sleeve (1), and a baffle (1034) is hinged on the cleaning through slot (1033).

Images