Automatic sample injector of PY-GC

Abstract

The utility model discloses an automatic sample injector of PY-GC, which relates to the field of sample injectors, and comprises a main body, the upper surface of the main body is connected with a turntable, a sample bottle is arranged in the turntable, the front part of the main body is provided with an operation panel, a sampling tube is arranged in the main body, one end of an eccentric block close to a fixed rod is fixedly provided with a half-tooth block, and the other end of the eccentric block close to the fixed rod is fixedly provided with a spring. According to the PY-GC automatic sample injector, the sampling tube can be inserted when sliding to the top end of a sample bottle, so that a sample is fed for detection, excessive positive and negative operation of a driving device is not needed, the damage probability of the device is reduced, and the detection efficiency is improved. When the rolling wheels rotate, abrasion generated by friction between the guide blocks and the guide grooves can be reduced, the damage probability of the device can be further improved when the abrasion is reduced, and when the output end of the sampling tube is inserted into the sample bottle, the two clamping blocks can rotate to the surface of the sample bottle for extrusion, so that the stability of the sample bottle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of samplers, and specifically relates to an automatic sampler for PY-GC. Background Technique

[0002] Samplers are applied in the fields of chemical analysis, environmental detection, biomedical research, etc. The main function is to accurately send the samples to be analyzed into the analytical instruments for subsequent determination and analysis. PY-GC is a thermal desorption instrument, which is an instrument for sample pretreatment. The main function is to heat the samples transported by an automatic sampler, so that the volatile or semi-volatile compounds in the samples are desorbed, and then these compounds are sent into the analytical instruments for further analysis.

[0003] At present, there are still some deficiencies in the automatic sampler of PY-GC, such as low detection efficiency:

[0004] In order to overcome the low detection efficiency, a Chinese patent (publication number: CN218272141U) in the prior art discloses an automatic sampler for a full-automatic thermal desorption instrument. It drives the rotation of the turntable through a rotating mechanism, and when the sampling bottle is detected by a photoelectric induction switch, it controls the rotating mechanism to close and open the telescopic mechanism, and controls the sampling pipette to insert into the sampling bottle through the telescopic mechanism for automatic sampling, replacing the traditional method of controlling the movement of the sampling tube through the cooperation of the X-axis, Y-axis and Z-axis for sampling. This not only improves the sampling efficiency, but also has a simpler structure and more convenient operation compared with the traditional one;

[0005] However, in the above document, the telescopic mechanism is used to control the sampling pipette to insert into the sampling bottle for automatic sampling. The telescopic mechanism operates in a threaded manner, and the driving motor rotates forward and backward frequently, which is easy to accelerate wear, thus reducing the service life of the device. Moreover, the threaded operation causes relatively large wear on the gears, and the later maintenance is more troublesome. Therefore, the existing structure needs to be improved. Content of the Utility Model

[0006] The purpose of the utility model is to provide an automatic sampler for PY-GC, so as to solve the problems of low sampling efficiency of the sampler, easy wear of the driving device, and low stability during sampling proposed in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution: an automatic sampler for PY-GC, including a main body of the sampler, a turntable is connected to the upper surface of the main body of the sampler, a sample bottle is arranged inside the turntable, an operation panel is installed at the front of the main body of the sampler, and a sampling tube is installed inside the main body of the sampler;

[0008] A first rotation groove is provided inside the main body of the device. A motor is installed inside the first rotation groove. A rotating wheel is fixed to the output end of the motor. A fixed rod is fixed inside the first rotation groove near the rotating wheel. A rotating mechanism for facilitating sample injection is provided inside the first rotation groove;

[0009] Second rotation grooves are symmetrically provided on the side surface of the first rotation groove. A clamping mechanism for improving the stability of sample injection is provided inside the second rotation groove.

[0010] Furthermore, the rotating mechanism further includes a movable block that penetrates and rotates on the surface of the fixed rod. An eccentric block penetrates and slides inside the movable block near the fixed rod.

[0011] Furthermore, a semi-tooth block is fixed to one end of the eccentric block near the fixed rod. The semi-tooth block is meshed and connected to the side surface of a first rack block. The first rack block is fixed to the side surface of the sampling tube. A guide block is fixed to the back of the sampling tube. The guide block penetrates and slides inside a guide groove. The guide groove is provided on the side surface of the first rotation groove.

[0012] Furthermore, a rolling mechanism for improving the service life of components is provided inside the guide block. The rolling mechanism includes a through groove that is symmetrically provided through the side surface of the guide block. A roller is rotatably connected inside the through groove.

[0013] Furthermore, the clamping mechanism includes a first gear. Both the first gear and a second gear rotate inside the second rotation groove. The second gear is meshed and connected to the side surface of the first gear. The second gear is meshed and connected to the side surface of a second rack block.

[0014] Furthermore, the second rack block is symmetrically fixed to the side surface of the sampling tube. The second gear, the second rack block, and the first gear are in a transmission connection. A long strip rod is fixed to the bottom of the first gear. A clamping block is fixed to the bottom end of the long strip rod.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. For the automatic sampler of this PY-GC, when the sampling tube slides to the top of the sample bottle, it can be inserted, thereby feeding the sample for detection. It does not require excessive forward and reverse operation of the driving device, reducing the probability of device damage. When the roller rotates, it can reduce the wear caused by the friction between the guide block and the guide groove. When the wear is reduced, it can further reduce the probability of device damage. When the output end of the sampling tube is inserted into the sample bottle, the two clamping blocks can rotate to the surface of the sample bottle for extrusion, improving the stability of the sample bottle;

[0017] 2. An eccentric block is provided. By means of the eccentric block, the rotation of the semi-tooth block can be driven. It does not require frequent forward and reverse operation of the driving device, reducing the wear of the device and improving the service life;

[0018] 3. A guiding block is provided, through which the sampling tube can be guided to prevent the sampling tube from shifting after being stressed, improving the stability of the operation of the sampling tube;

[0019] 4. A roller is provided, which can roll inside the guiding groove, reducing the wear when the guiding block slides inside the guiding groove, and further improving the stability of the operation of the sampling tube;

[0020] 5. A second rack block is provided, and the second rack block runs synchronously with the sampling tube, thereby driving the clamping block to extrude the sample bottle, eliminating the need for an additional driving device, improving the stability of the sample bottle, and being more convenient to use. Description of the Drawings

[0021] Figure 1 is the front view three-dimensional structure schematic diagram of the whole of the present utility model;

[0022] Figure 2 is the sectional three-dimensional structure schematic diagram of the main body of the present utility model;

[0023] Figure 3 is the enlarged three-dimensional structure schematic diagram of the sampling tube of the present utility model;

[0024] Figure 4 is the enlarged three-dimensional structure schematic diagram of the movable block of the present utility model;

[0025] Figure 5 is the enlarged three-dimensional structure schematic diagram of the guiding block of the present utility model;

[0026] Figure 6 is the enlarged three-dimensional structure schematic diagram of the long bar of the present utility model.

[0027] In the figure: 1, main body of the device; 2, turntable; 3, sample bottle; 4, operation panel; 5, sampling tube; 101, first rotating groove; 102, motor; 103, rotating wheel; 104, fixed rod; 105, movable block; 106, eccentric block; 107, semi-tooth block; 108, first rack block; 109, guiding block; 110, guiding groove; 111, through groove; 112, roller; 113, second rotating groove; 114, first gear; 115, second gear; 116, second rack block; 117, long bar; 118, clamping block. Detailed Embodiment

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0029] Embodiment 1:

[0030] As Figures 1 - 4 shown in the technical solution, the present utility model provides the following technical solution: To solve the problems of low sample injection efficiency of the injector and easy acceleration of wear of the driving device, a rotating mechanism is disclosed:

[0031] It includes an instrument body 1. A turntable 2 is connected to the upper surface of the instrument body 1. A sample bottle 3 is arranged inside the turntable 2. An operation panel 4 is installed at the front of the instrument body 1. A sampling tube 5 is installed inside the instrument body 1. A first rotating groove 101 is opened inside the instrument body 1. A motor 102 is installed inside the first rotating groove 101. The output end of the motor 102 is fixed with a rotating wheel 103. A fixed rod 104 is fixed inside the first rotating groove 101 near the rotating wheel 103. A rotating mechanism for facilitating sample injection is arranged inside the first rotating groove 101. Second rotating grooves 113 are symmetrically opened on the side surface of the first rotating groove 101. A clamping mechanism for improving the injection stability is arranged inside the second rotating grooves 113. The rotating mechanism further includes a movable block 105, which penetrates and rotates on the surface of the fixed rod 104. An eccentric block 106 penetrates and slides inside the movable block 105 near the fixed rod 104. One end of the eccentric block 106 close to the fixed rod 104 is fixed with a semi-tooth block 107. The side surface of the semi-tooth block 107 is meshed and connected with a first rack block 108. The first rack block 108 is fixed on the side surface of the sampling tube 5. A guide block 109 is fixed on the back of the sampling tube 5. The guide block 109 penetrates and slides inside a guide groove 110. The guide groove 110 is opened on the side surface of the first rotating groove 101. When the injector is in use, the operation program is set through the operation panel 4. The turntable 2 can drive the sample bottle 3 to rotate to the bottom of the output end of the sampling tube 5 for feeding. When feeding, starting the output end of the motor 102 can drive the rotating wheel 103 to rotate. When the rotating wheel 103 rotates, it can drive the eccentric block 106 to rotate. When the eccentric block 106 rotates, it can squeeze the inside of the movable block 105. When the movable block 105 is squeezed, it can rotate through the fixed rod 104. When the movable block 105 rotates, it can drive the semi-tooth block 107 to rotate. When the semi-tooth block 107 rotates, it can drive the first rack block 108 to engage and move. When the first rack block 108 engages and moves, it can drive the sampling tube 5 to move. When the sampling tube 5 moves, it can drive the guide block 109 to move. When the guide block 109 moves, it can slide through the guide groove 110. When the sampling tube 5 slides to the top of the sample bottle 3, it can be inserted, so as to feed the sample for detection. It does not require excessive forward and reverse operation of the driving device, reduces the probability of device damage, and improves the injection efficiency at the same time.

[0032] Embodiment 2:

[0033] As Figure 4 and Figure 5 shown in the technical solution, the present utility model provides the following technical solution: To solve the problem that the components of the injector wear out relatively quickly and affect the product quality, a rolling mechanism is disclosed:

[0034] Inside the guiding block 109, there is a rolling mechanism for improving the service life of components. The rolling mechanism includes a through groove 111 which is symmetrically opened on the side surface of the guiding block 109. A roller 112 is rotatably connected inside the through groove 111. When the sampler injects the sample, the guiding block 109 can slide through the guiding groove 110. When the guiding block 109 slides, it can drive the internal roller 112 to move. When the roller 112 moves, it can exert extrusion on the inner side of the guiding groove 110. When the roller 112 is extruded, it can rotate through the through groove 111. When the roller 112 rotates, it can reduce the wear caused by the friction between the guiding block 109 and the guiding groove 110. When the wear is reduced, it can further reduce the probability of device damage, and at the same time improve the smoothness of the operation of the sampling tube 5, thereby improving the sampling efficiency in disguise.

[0035] Embodiment 3:

[0036] As Figure 2 and Figure 6 shown in the technical solution, the present utility model provides the following technical solution: In order to solve the problem that the stability of the sampler during sampling is not high, which may cause sample leakage or instrument damage, a clamping mechanism is disclosed:

[0037] The clamping mechanism includes a first gear 114. Both the first gear 114 and the second gear 115 rotate inside the second rotating groove 113. The second gear 115 is meshed and connected to the side surface of the first gear 114. A second rack block 116 is meshed and connected to the side surface of the second gear 115. The second rack block 116 is symmetrically fixed on the side surface of the sampling tube 5. The second gear 115, the second rack block 116 and the first gear 114 are in transmission connection. A long bar 117 is fixed at the bottom of the first gear 114, and a clamping block 118 is fixed at the bottom end of the long bar 117. When the sampler is loading, the sampling tube 5 can move downward inside the first rotating groove 101. When the sampling tube 5 moves, it can drive the second rack block 116 to move. When the second rack block 116 moves, it can drive the second gear 115 to rotate meshingly. When the second gear 115 rotates meshingly, it can rotate through the second rotating groove 113. When the second gear 115 rotates, it can drive the first gear 114 to rotate meshingly. When the first gear 114 rotates meshingly, it also rotates through the second rotating groove 113. When the first gear 114 rotates, it can drive the long bar 117 at the bottom to rotate. When the long bar 117 rotates, it can drive the clamping block 118 to rotate. When the output end of the sampling tube 5 is inserted into the sample bottle 3, the two clamping blocks 118 can rotate to the surface of the sample bottle 3 for extrusion. As the sampling tube 5 continues to penetrate, the extrusion force of the clamping block 118 will be greater. When the sample bottle 3 is extruded, its stability can be improved, reducing the possible accidents during the sampling process and improving the safety of the operation.

[0038] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A PY-GC automatic sample injector, comprising a main body (1), a turntable (2) connected to the upper surface of the main body (1), a sample bottle (3) arranged inside the turntable (2), an operation panel (4) installed at the front of the main body (1), a sampling tube (5) installed inside the main body (1), characterized in that ； A first rotating groove (101) is provided inside the device body (1), a motor (102) is installed inside the first rotating groove (101), a rotating wheel (103) is fixed to the output end of the motor (102), a fixing rod (104) is fixed inside the first rotating groove (101) near the rotating wheel (103), and a rotating mechanism for facilitating sample injection is provided inside the first rotating groove (101); A second rotating groove (113) is symmetrically provided on the side surface of the first rotating groove (101), and a clamping mechanism for improving injection stability is arranged inside the second rotating groove (113).

2. The automatic sample injector for PY-GC according to claim 1, characterized in that: The rotating mechanism further comprises a movable block (105) which penetrates and rotates on the surface of the fixed rod (104); an eccentric block (106) is slidably penetrated inside the movable block (105) close to the fixed rod (104).

3. The automatic sample injector for PY-GC according to claim 2, characterized in that: A half tooth block (107) is fixed to one end of the eccentric block (106) close to the fixed rod (104); the side of the half tooth block (107) is meshedly connected with a first rack block (108); the first rack block (108) is fixed to the side of the sampling tube (5); a guide block (109) is fixed to the back of the sampling tube (5); the guide block (109) penetrates and slides inside a guide groove (110); and the guide groove (110) is opened on the side of the first rotating groove (101).

4. The automatic sample injector for PY-GC according to claim 3, characterized in that: A rolling mechanism for increasing the service life of components is arranged inside the guide block (109), and the rolling mechanism comprises a through groove (111). The through groove (111) is symmetrically opened on the side of the guide block (109), and a roller (112) is rotatably connected inside the through groove (111).

5. The automatic sample injector for PY-GC according to claim 1, characterized in that: The clamping mechanism comprises a first gear (114), the first gear (114) and the second gear (115) both rotate inside the second rotating groove (113), the second gear (115) is meshedly connected to the side surface of the first gear (114), and the side surface of the second gear (115) is meshedly connected to a second rack block (116).

6. The automatic sample injector for PY-GC according to claim 5, characterized in that: The second rack block (116) is symmetrically fixed on the side of the sampling tube (5); the second gear (115), the second rack block (116) and the first gear (114) are in transmission connection; a long bar (117) is fixed at the bottom of the first gear (114); a clamping block (118) is fixed at the bottom end of the long bar (117).

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