A sealed sample introduction device for facilitating liquid discharge

Abstract

The utility model provides a sealed sampling device convenient to drain, including base, waste pipe, the combustion pipe of being located in the corresponding place of base, the base on be equipped with sliding block base body and the sampling slide axle of sliding in sliding block base body, the sliding block base body on be equipped with the through -hole of sampling slide axle sliding, the combustion pipe entrance end be located in sliding block base body, with the through -hole intercommunication, the sampling slide axle in be equipped with the sampling pipe, the sliding block base body with sampling slide axle between be equipped with the radial seal structure of sealed combustion pipe, still include the drive mechanism of drive sampling slide axle sliding, make sampling pipe respectively with the cooperation of combustion pipe and waste pipe. The utility model discloses convenient installation, simple structure, and the sealing effect is good.

Description

Technical Field

[0001] This utility model relates to the field of TOC detection technology, and in particular to a sealed sample injection device that facilitates liquid drainage. Background Technology

[0002] The combustion-based TOC analyzer is a high-end instrument used for the precise measurement of total organic carbon in water samples. It is widely used in industries such as pharmaceuticals, power generation, microelectronics, chemicals, and environmental protection, and is a core indicator for assessing the degree of organic pollution in water. The core principle of the combustion-based TOC analyzer is to completely oxidize the organic carbon in the water sample into carbon dioxide (CO2) under high temperature, oxygen-rich conditions, and in the presence of a catalyst. The concentration of CO2 generated is then measured to calculate the total organic carbon concentration in the water sample.

[0003] The existing sample introduction device has the sample inlet tube directly above the combustion tube. When switching samples, the TOC equipment needs to spend a lot of time rinsing the original pipeline to remove the residue of the sample analyzed in the previous analysis. At the same time, the waste liquid after rinsing will enter the combustion furnace and be heated and analyzed to determine whether the rinsing is qualified. This results in a long time to wait for the waste liquid in the combustion furnace to react completely. It may also affect the stability of the test data and the service life of the catalyst in the combustion tube. This process greatly affects the analysis efficiency.

[0004] Existing sample injection devices typically have a sealing ring at the inlet of the combustion tube. The sample injection slider needs to be pressed against the sealing ring for sealing. When installing the slider, a pressure roller is required to press the sealing ring tightly. The processing and installation process is complicated and leakage is likely to occur if the pressure roller is not pressed tightly. Utility Model Content

[0005] To address the problems of the prior art, this invention provides a sealed sample injection device that facilitates liquid drainage. A sealing ring is provided between the cylindrical sample injection slider and the slider base to radially seal the slider. This device is easy to install, has a simple structure, and provides better sealing performance.

[0006] The technical solution adopted is as follows: A sealed sample injection device for easy drainage includes a base, a waste discharge tube, and a combustion tube disposed on the base. The base has a slider body and a sample injection slide shaft that slides within the slider body. The slider body has a through hole for the sample injection slide shaft to slide. The inlet end of the combustion tube is disposed within the slider body and communicates with the through hole. The sample injection slide shaft contains a sample injection tube. A radial sealing structure for sealing the combustion tube is provided between the slider body and the sample injection slide shaft. The device also includes a driving mechanism for driving the sample injection slide shaft to slide and causing the sample injection tube to engage with the combustion tube and the waste discharge tube respectively.

[0007] Furthermore, a sleeve connector and a connector fixing seat are provided between the sample injection slide shaft and the sample injection tube. One end of the sleeve connector is inserted into the connector fixing seat, and a first sealing ring is provided between the connector fixing seat and the inner wall of the sample injection slide shaft.

[0008] Furthermore, the sample injection slide shaft is provided with a plug and a mounting seat for the plug at one end corresponding to the sample injection tube (501), and a second sealing ring is provided between the plug and the mounting seat.

[0009] Furthermore, the radial sealing structure includes a third sealing ring and a fourth sealing ring on both sides of the combustion tube inlet end. The third and fourth sealing rings are snapped into the inner wall of the through hole and cooperate with the sample injection slide shaft.

[0010] Furthermore, the waste discharge pipe is located on the side of the slider base away from the sample inlet pipe.

[0011] Furthermore, the lower end of the combustion tube is connected to the combustion furnace; the sample inlet slide is perpendicularly arranged between the sample inlet and the combustion tube, and the sample inlet is provided with a bend that can guide the liquid to the inlet end of the combustion tube.

[0012] Furthermore, a fifth sealing ring is provided between the combustion tube and the slider base.

[0013] Furthermore, the base is equipped with a photoelectric sensor that can detect the sliding position of the sample injection slide shaft. The sample injection tube of the sample injection slide shaft is in a first position when it is engaged with the combustion tube; the sample injection tube of the sample injection slide shaft is in a second position when it is engaged with the waste discharge tube. The photoelectric sensor includes a first photoelectric sensor for detecting the first position and a second photoelectric sensor for detecting the second position.

[0014] Furthermore, the drive mechanism includes a cylinder assembly or an electric push rod assembly mounted on the slider base.

[0015] Furthermore, the driving mechanism is an electric push rod assembly, including a mounting plate on the slider base, an electric push rod on the mounting plate, and a floating connecting plate at one end of the electric push rod that engages with the card seat and drives the sample injection slide shaft to slide.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention provides a sealed sample injection device for easy drainage, comprising a combustion tube, a waste discharge tube, and a slider base mounted on a base. The slider base has a through hole for the sliding of a sample injection shaft. The combustion tube is located within the slider base, with its inlet end communicating with the through hole. The sample injection shaft contains a sample injection tube, which can mate with either the combustion tube or the waste discharge tube. A radial sealing structure is provided between the slider base and the sample injection shaft, including a third sealing ring and a fourth sealing ring located on both sides of the inlet end of the combustion tube on the inner wall of the through hole. The sample injection shaft is directly inserted into the slider base to achieve radial sealing, eliminating the need for screws or other clamping structures, simplifying the structure, and providing better radial sealing performance and reducing leakage. During rinsing, the sample injection tube directly mates with the waste discharge tube to discharge waste liquid, saving drainage time and increasing efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 for Figure 2 A cross-sectional view facing direction AA; Figure 4 This is a cross-sectional schematic diagram of the sample inlet tube and the waste outlet tube in combination. Figure 5 This is a partial structural disassembly diagram of the present invention; Figure 6 for Figure 4 Enlarged view at point a; The components include: base 1, waste discharge pipe 2, combustion pipe 3, slider base 4, sample injection shaft 5, sample injection tube 501, plug 502, radial sealing structure 6, drive mechanism 7, mounting plate 701, electric push rod 702, floating connecting plate 703, sleeve joint 8, joint fixing seat 9, first sealing ring 10, second sealing ring 11, third sealing ring 12, fourth sealing ring 13, through hole 14, fifth sealing ring 15, combustion furnace 16, card seat 17, photoelectric sensor 18, first photoelectric sensor 1801, second photoelectric sensor 1802, identification baffle 19, and bend pipe 20. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments.

[0019] refer to Figure 1-6A sealed sample injection device for easy drainage includes a base 1, a waste discharge pipe 2, and a combustion pipe 3 located at a corresponding position on the base 1. The base 1 is provided with a slider base 4 and a sample injection slide shaft 5 sliding within the slider base 4. The slider base 4 is provided with a through hole 14 for the sample injection slide shaft 5 to slide. The inlet end of the combustion pipe 3 is located within the slider base 4 and communicates with the through hole 14. The sample injection slide shaft 5 is provided with a sample injection tube 501. A radial sealing structure 6 for sealing the combustion pipe 3 is provided between the slider base 4 and the sample injection slide shaft 5. The device also includes a driving mechanism 7 for driving the sample injection slide shaft 5 to slide and causing the sample injection tube 501 to cooperate with the combustion pipe 3 and the waste discharge pipe 2 respectively.

[0020] The sample inlet tube 501 of the sample inlet slide 5 is engaged with the combustion tube 3 in a first position; the sample inlet tube 501 of the sample inlet slide 5 is engaged with the waste discharge tube 2 in a second position. The base 1 is equipped with a photoelectric sensor 18 capable of detecting the sliding position of the sample inlet slide 5, and the mounting bracket 17 of the sample inlet slide 5 is equipped with an identification baffle 19 that cooperates with the photoelectric sensor 18 for detection. The photoelectric sensor 18 includes a first photoelectric sensor 1801 for detecting the first position and a second photoelectric sensor 1802 for detecting the second position. The photoelectric sensor 18 cooperates with the drive mechanism 7; after detecting the position of the sample inlet slide 5, it feeds back to the drive mechanism 7 to drive the sample inlet slide 5 to the first or second position and stop.

[0021] When the sample inlet slide 5 is in the first position, the sample inlet tube 501 is engaged with the combustion tube 3, the lower end of which is connected to the combustion furnace 16. Water sample is injected into the sample inlet tube 501, and the water sample will enter the combustion tube 3 and then the combustion furnace 16 for reaction. The water sample is oxidized to carbon dioxide (CO2), and then the content of generated CO2 is detected to calculate the total organic carbon concentration in the water sample.

[0022] If a different water sample needs to be tested, the drive mechanism 7 needs to drive the sample inlet slide shaft 5 to the second position. At this time, the sample inlet tube 501 and the waste discharge tube 2 work together to repeatedly rinse the sample inlet tube 501. The rinsed liquid is directly discharged into the waste discharge tube 2. After rinsing, the sample returns to the first position, and the water sample is switched for retesting. By setting the waste discharge tube 2 to discharge the rinse waste liquid directly from the waste discharge tube 2 instead of discharging it into the combustion tube 3, the waste liquid discharge time is shortened, the impact on the stability of the test data and the service life of the catalyst in the combustion tube 3 is reduced, and the detection efficiency is improved.

[0023] A sleeve connector 8 and a connector fixing seat 9 are provided between the sample injection slide shaft 5 and the sample injection tube 501. One end of the sleeve connector 8 is inserted into the connector fixing seat 9, and a first sealing ring 10 is provided between the connector fixing seat 9 and the inner wall of the sample injection slide shaft 5. The sleeve connector 8 is fitted onto the sample injection tube 501, and the connector fixing seat 9 is fitted onto the sleeve connector 8, and then sealed to the sample injection slide shaft 5. The first sealing ring 10 enhances the sealing performance and prevents leakage. The sleeve connector 8 and the connector fixing seat 9 can be connected by threads.

[0024] The sample inlet slide 5 is perpendicularly positioned to the combustion tube 3. The sample inlet tube 501 is equipped with a bent tube 20 that guides the liquid to the inlet end of the combustion tube 3. The waste discharge tube 2 is located on the side of the slider base 4 away from the sample inlet tube 501. The bent tube 20 can also be aligned with the waste discharge tube 2 to cooperate with the waste discharge tube 2 to discharge liquid.

[0025] The sample injection slide shaft 5 has a sample injection tube 501 at one end and a plug 502 and a retainer 17 for mounting the plug 502 at the other end. A second sealing ring 11 is provided between the plug 502 and the retainer 17. The plug 502 blocks the other end of the sample injection slide shaft 5 and the second sealing ring 11 is provided to prevent sample leakage.

[0026] The radial sealing structure 6 includes a third sealing ring 12 and a fourth sealing ring 13 located on both sides of the inlet end of the combustion tube 3. The third and fourth sealing rings are snapped into the inner wall of the through hole and cooperate with the sample injection slide shaft 5. With the third and fourth sealing rings located on both sides of the combustion tube 3, leakage from both sides is less likely when liquid enters the sample injection tube 501, allowing complete entry into the combustion tube 3 and ensuring detection accuracy. By directly cooperating with the outer wall of the sample injection slide shaft 5 using the radial sealing structure 6, compared to existing technologies that directly place the sealing ring at the inlet of the combustion tube, this invention eliminates the need for a clamping structure to drive the slider to clamp the sealing ring, and also eliminates the need for screw clamping. It only requires insertion for installation, resulting in better sealing, easier installation, simpler structure, and reduced leakage.

[0027] A fifth sealing ring 15 is provided between the combustion tube 3 and the slider base 4. The fifth sealing ring 15 is provided to seal the combustion tube 3 and the slider base 4 to prevent liquid leakage.

[0028] Preferably, a cooling fan can be installed near the combustion pipe 3.

[0029] The drive mechanism 7 includes a cylinder assembly or an electric push rod assembly mounted on the slider base 4.

[0030] Preferably, the driving mechanism 7 used in this embodiment is an electric push rod assembly, including a mounting plate 701 disposed on the slider base 4 and an electric push rod 702 disposed on the mounting plate 701. One end of the electric push rod 702 is provided with a floating connecting plate 703 that engages with the card holder 17 and drives the sample injection slide shaft 5 to slide. The electric push rod 702 pushes the floating connecting plate 703 to move, and drives the sample injection slide shaft 5 to slide through the card holder 17, so that the sample injection slide shaft 5 moves between a first position and a second position.

[0031] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A sealed sample injection device for easy liquid drainage, comprising a base (1), a waste discharge tube (2), and a combustion tube (3) disposed on the base, characterized in that: The base (1) is provided with a slider base (4) and a sample injection slide shaft (5) that slides within the slider base (4). The slider base (4) is provided with a through hole (14) for the sample injection slide shaft (5) to slide. The inlet end of the combustion tube (3) is located within the slider base (4) and is connected to the through hole (14). The sample injection slide shaft (5) is provided with a sample injection tube (501). A radial sealing structure (6) for sealing the combustion tube (3) is provided between the slider base (4) and the sample injection slide shaft (5). The base also includes a driving mechanism (7) for driving the sample injection slide shaft (5) to slide and for the sample injection tube (501) to cooperate with the combustion tube (3) and the waste discharge tube (2) respectively.

2. The sealed sample injection device for easy liquid drainage as described in claim 1, characterized in that: A sleeve connector (8) and a connector fixing seat (9) are provided between the sample injection slide shaft (5) and the sample injection tube (501). One end of the sleeve connector (8) is inserted into the connector fixing seat (9). A first sealing ring (10) is provided between the connector fixing seat (9) and the inner wall of the sample injection slide shaft (5).

3. The sealed sample injection device for easy liquid drainage as described in claim 1, characterized in that: The injection slide shaft (5) is provided with a plug (502) and a mounting seat (17) for the plug (502) at one end of the injection tube (501), and a second sealing ring (11) is provided between the plug (502) and the mounting seat (17).

4. The sealed sample injection device for easy liquid drainage as described in claim 1, characterized in that: The radial sealing structure (6) includes a third sealing ring (12) and a fourth sealing ring (13) on both sides of the inlet end of the combustion tube (3). The third and fourth sealing rings are snapped into the inner wall of the through hole (14) and cooperate with the sample injection slide shaft (5).

5. The sealed sample injection device for easy liquid drainage as described in claim 1, characterized in that: The waste discharge pipe (2) is located on the side of the slider base (4) away from the sample inlet pipe (501).

6. The sealed sample injection device for easy liquid drainage as described in claim 1, characterized in that: The lower end of the combustion tube (3) is connected to the combustion furnace (16); the sample inlet slide (5) is vertically arranged between the sample inlet slide (5) and the combustion tube (3); the sample inlet tube (501) is provided with a bent tube (20) that can guide the liquid to the inlet end of the combustion tube.

7. The sealed sample injection device for easy liquid drainage as described in claim 1, characterized in that: A fifth sealing ring (15) is provided between the combustion tube (3) and the slider base (4).

8. The sealed sample injection device for easy liquid drainage as described in claim 1, characterized in that: The base (1) is provided with a photoelectric sensor (18) that can detect the sliding position of the sample injection slide shaft (5). The sample injection tube of the sample injection slide shaft (5) is in the first position when it is in conjunction with the combustion tube (3); the sample injection tube of the sample injection slide shaft is in the second position when it is in conjunction with the waste discharge tube. The photoelectric sensor (18) includes a first photoelectric sensor (1801) for detecting the first position and a second photoelectric sensor (1802) for detecting the second position.

9. The sealed sample injection device for easy liquid drainage as described in claim 1, characterized in that: The drive mechanism (7) includes a cylinder assembly or an electric push rod assembly mounted on the slider base (4).

10. The sealed sample injection device for easy liquid drainage as described in claim 3, characterized in that: The driving mechanism (7) is an electric push rod assembly, including a mounting plate (701) on the slider base (4) and an electric push rod (702) on the mounting plate (701). One end of the electric push rod (702) is provided with a floating connecting plate (703) that engages with the card seat (17) and drives the sample injection slide shaft to slide.

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