Automatic sample injection system and method for transmission and reflection double accessories of infrared spectrometer

Abstract

According to the automatic sampling system and method for the transmission and reflection double-path accessories of the infrared spectrometers, the two liquid pools can be connected at the same time by adopting a double-channel design, the liquid pools comprise the attenuated total reflection type liquid pool and the transmission type liquid pool, and different infrared spectrometers can be connected at the same time for testing when the two liquid pools are detected; the two liquid pools can be randomly combined, so that the automatic sample injection system can simultaneously carry out tests by a transmission method, an attenuated total reflection method or a transmission method and an attenuated total reflection method; two double-channel peristaltic pumps, a liquid inlet container, a liquid outlet container and a liquid inlet pipe are utilized; the liquid outlet pipe is used for accurately feeding liquid into the liquid pool or recycling the liquid in the liquid pool into the liquid outlet container, so that efficient and accurate sample feeding and recycling of a liquid sample in a transmission and reflection measurement path in the infrared spectrometer are realized, detection can be carried out by using different or the same method at the same time, results can be compared to avoid errors, and the detection accuracy is improved. And the convenience and the measurement precision of experimental operation are improved.

Description

Technical Field

[0001] The invention relates to the technical field of infrared spectrometers, and in particular to an automatic sampling system and method for transmission and reflection dual accessories of an infrared spectrometer. Background Art

[0002] In the field of infrared spectroscopy, liquid cells are often required for the detection of liquid samples. Traditional liquid cells have some limitations in use.

[0003] Existing liquid pools often have a fixed structure and cannot be flexibly adjusted to accommodate the detection of samples with different thickness requirements. In actual analytical work, different liquid samples may require different optical path lengths to obtain the best detection effect. For example, for samples with higher concentrations, a shorter optical path may be more appropriate to avoid excessive absorption leading to spectrum saturation; while for samples with lower concentrations, a longer optical path is required to enhance signal strength. However, liquid pools with fixed structures cannot meet such diverse needs. In actual tests, only one liquid pool can be injected and tested at the same time.

[0004] Therefore, an adjustable liquid cell for transmission of an infrared spectrometer with conveniently adjustable optical path is needed to meet the optical path required by different samples to achieve the best detection effect and avoid optical path errors and degradation of sealing performance caused by repeated disassembly. A sampling device is also needed to be used in conjunction with it, and different infrared spectrometers can be connected for simultaneous testing, such as simultaneous transmission method, simultaneous attenuated total reflection method, or one transmission method and one attenuated total reflection method to form an automatic sampling system. Summary of the invention

[0005] The object of the present invention is to provide an automatic sampling system and method for transmission and reflection dual accessories of an infrared spectrometer, which can solve the above problems.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] An automatic sampling system for transmission and reflection dual accessories of an infrared spectrometer, comprising a liquid inlet and outlet device and a liquid pool device;

[0008] The liquid pool device comprises an attenuated total reflection type liquid pool and a transmission type liquid pool. Both the attenuated total reflection type liquid pool and the transmission type liquid pool are provided with a liquid cavity for accommodating liquid, and the liquid cavity is also provided with a liquid inlet channel and a liquid outlet channel.

[0009] The liquid inlet and outlet device includes a liquid inlet container, a liquid outlet container, a liquid inlet pipe, a liquid outlet pipe and a first dual-channel peristaltic pump and a second dual-channel peristaltic pump. The dual-channel peristaltic pump has two liquid inlets and two liquid outlets. The two liquid inlets of the first dual-channel peristaltic pump are connected to one or two liquid inlet containers through the liquid inlet pipe, the two liquid outlets of the first dual-channel peristaltic pump are connected to the liquid inlet channels of the attenuated total reflection liquid pool and the transmission liquid pool through the liquid inlet pipe, the two liquid outlets of the second dual-channel peristaltic pump are connected to the liquid outlet channels of the attenuated total reflection liquid pool and the transmission liquid pool, and the two liquid outlets of the second dual-channel peristaltic pump are connected to one or two liquid inlet containers through the discharge pipe.

[0010] Furthermore, a first liquid inlet pinch valve, a first liquid outlet pinch valve, a second liquid inlet pinch valve, and a second liquid outlet pinch valve are further provided below the first dual-channel peristaltic pump and the second dual-channel peristaltic pump;

[0011] The first liquid inlet clamping tube valve clamps a liquid inlet tube connecting a liquid pool and a liquid inlet channel, and the second liquid inlet clamping tube valve clamps another liquid pool and a liquid inlet tube connecting the liquid inlet channel, thereby controlling the opening and closing of the liquid inlet tube;

[0012] The first liquid outlet clamping valve clamps a liquid outlet tube connecting a liquid pool and a liquid outlet channel, and the second liquid outlet clamping valve clamps a liquid outlet tube connecting another liquid pool and a liquid outlet channel, thereby controlling the opening and closing of the liquid outlet tubes.

[0013] Furthermore, the liquid inlet and outlet device also includes a body and a gap regulating valve, and the gap regulating valve includes a regulating member, a screw rod and a nut;

[0014] The roller of the dual-channel peristaltic pump is rotatably arranged on the host;

[0015] The adjusting member is provided with a cavity capable of accommodating the roller, and the inner wall of the adjusting member and the roller can clamp or release the liquid inlet pipe or the liquid outlet pipe; the adjusting member can be rotatably connected to the main machine around the first side to adjust the clamping gap between the inner wall of the adjusting member and the roller;

[0016] The screw rod is vertically fixed on the machine body, and the nut is threadedly connected to the screw rod and supports the adjusting member;

[0017] When the nut is lifted or lowered relative to the screw rod, the adjusting member can be driven to rotate around the first side.

[0018] Furthermore, the transmission liquid pool includes a base, an upper cover with a first lens, a rotating shaft, and a second lens, and is characterized in that a rotating shaft is provided on the left and right sides of the base, the rotating shaft passes through the upper cover, the second lens is placed on the base and is located directly below the first lens, and when the rotating shaft itself rotates, the rotating shaft can enable the upper cover to drive the first lens to move up and down to adjust the distance between the first lens and the second lens.

[0019] Furthermore, the base is provided with a second lens hole, the second lens is placed on the second lens hole, holes for installing bearings are also provided on both sides of the second lens hole, the rotating shaft is arranged on the bearings, and a transmission assembly capable of driving the rotating shaft to rotate is also arranged on the surface of the base, and a knob is arranged at one end of the transmission assembly.

[0020] Furthermore, it includes a liquid tank fixing device, which is placed on the base and includes a fixing block and a receiving block that passes through from top to bottom, the fixing blocks are located on both sides of the liquid tank fixing device and are fixedly installed with vertical guide columns, the receiving block is located at the center of the liquid tank fixing device and presses against the second lens, two small holes are opened at the receiving block where it presses against the top wall of the second lens, which are respectively connected to the liquid inlet channel and the liquid outlet channel, a second sealing ring is arranged around the contact surface, a first sealing ring is installed on the inner wall of the receiving block, the liquid tank fixing device reserves an accommodating space for the transmission assembly on the base, and a telescopic steel ball is installed on the outer surface of the liquid tank fixing device, which can match the concave surface opened on the side of the knob facing the liquid tank fixing device.

[0021] Furthermore, small holes are opened on the left and right sides of the upper cover and are sleeved on the guide column through the small holes. The rotating shaft passes through the threaded hole on the upper cover. The first lens is fixed to the upper cover by a fixing nut and is coaxial with the central hole of the upper cover. The second lens hole, the accommodating block that passes through the upper and lower parts, and the central hole of the upper cover are coaxial and the first lens is inserted in the accommodating block of the liquid tank fixing device. The lower wall of the first lens, the top wall of the second lens and the surrounding wall of the accommodating block form a closed liquid cavity for accommodating liquid.

[0022] Further, the transmission assembly includes a synchronous belt transmission device, a first transmission device, and a second transmission device, wherein the synchronous belt transmission device is installed at positions close to the edges on both sides of the base surface, the output end of the synchronous belt transmission device is connected to the first transmission device, and the second transmission device is fixed on the rotating shaft and the second transmission device is in contact with and meshed with the first transmission device;

[0023] The synchronous belt transmission device includes a synchronous seat, a synchronous wheel, and a synchronous belt. The synchronous seat is installed on the base surface of the liquid tank fixing device. The synchronous wheel is fixedly arranged on the synchronous seat and the output end passes through the synchronous seat. The other end passes through the liquid tank fixing device and is installed with a knob. The synchronous belt passes around the synchronous wheel and is arranged on the synchronous wheel.

[0024] The first transmission device comprises a first transmission seat and a first transmission body, wherein the first transmission seat is coaxial with the synchronous seat, and the first transmission body is mounted on the transmission seat and fixedly connected to the synchronous wheel;

[0025] The second transmission device comprises a second transmission body fixed on the rotating shaft, and the second transmission body is meshed with the first transmission body;

[0026] The first transmission device is a worm transmission device or a bevel gear transmission device, and the second transmission device is a worm gear transmission device or a bevel gear transmission device.

[0027] Furthermore, the attenuated total reflection type liquid pool includes a liquid tank with an opening at the lower end;

[0028] The bottom of the liquid bin is in contact with the total reflection mirror, and a closed liquid pool is formed between the inner cavity of the liquid bin and the total reflection mirror. A liquid inlet channel and a liquid discharge channel are provided on the peripheral wall of the liquid bin. One end of the liquid inlet channel and the liquid discharge channel are connected to the liquid cavity, and the other end is connected to the liquid inlet pipe and the liquid discharge pipe respectively.

[0029] Furthermore, a detection method using the automatic sampling device of an infrared spectrometer as described in any one of claims 1 to 9 comprises the following steps:

[0030] S1. Connect the reflective liquid cell and the transmissive liquid cell to a dual-channel peristaltic pump;

[0031] S2. The first dual-channel peristaltic pump is started, and the blank liquid in the liquid inlet container is transported to the reflective liquid pool and the transmissive liquid pool through the liquid inlet pipe. The first dual-channel peristaltic pump is turned off, and the second dual-channel peristaltic pump is started. The blank liquid in the reflective liquid pool and the transmissive liquid pool is recovered through the liquid outlet pipe and enters the liquid outlet container;

[0032] S3. Start the first dual-channel peristaltic pump again to deliver the test liquid in the other liquid inlet container to the reflective liquid pool and the transmissive liquid pool. After the test liquid in the liquid pool is sufficient, close the first dual-channel peristaltic pump and close the liquid inlet pipe through the first liquid inlet pinch valve and the second liquid inlet pinch valve to prevent backflow;

[0033] S4. emitting infrared light to the reflective liquid pool and the transmissive liquid pool to detect the liquid to be tested;

[0034] S5. After the detection is completed, the second dual-channel peristaltic pump is turned on to discharge the detected liquid in the reflective liquid pool and the transmission liquid pool and recover it into the liquid outlet container through the discharge pipe.

[0035] The present invention has the beneficial effects:

[0036] By rotating the knob, the synchronous belt drive device is driven to rotate together.

[0037] 1. Drive the synchronous belt transmission device at the other end to rotate simultaneously, thereby driving the first transmission devices at both ends to rotate simultaneously. The first transmission devices at both ends transmit the rotational power to the second transmission devices at both ends, so as to drive the rotation shaft to rotate, thereby driving the second optical lens lifting device to move up and down, so that the second optical lens installed on the second optical lens lifting device can also move up and down, thereby realizing the adjustment of the optical path without disassembly, and this liquid pool can face different test liquids.

[0038] 2. The automatic sampling system adopts a dual-channel design, which can be connected to different infrared spectrometers for simultaneous testing, such as simultaneous transmission method, simultaneous attenuated total reflection method, or one transmission method and one attenuated total reflection method. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a three-dimensional schematic diagram of the automatic sampling system for the transmission and reflection dual-path accessories of the infrared spectrometer of the present invention;

[0040] Figure 2 It is a three-dimensional schematic diagram of the automatic sampling system for the infrared spectrometer transmission dual-path accessory of the present invention;

[0041] Figure 3 It is a three-dimensional schematic diagram of the automatic sampling system for the infrared spectrometer reflective dual-path accessory of the present invention;

[0042] Figure 4 for Figure 1 Partial magnified image;

[0043] Figure 5 This is a diagram of the liquid inlet and outlet device;

[0044] Figure 6 for Figure 1 Side view;

[0045] Figure 7 It is a three-dimensional schematic diagram of the transmission liquid pool;

[0046] Figure 8 The schematic diagram of the transmission assembly components on the base is a worm gear and a first lens;

[0047] Fig. 9 The transmission assembly components on the base are a bevel gear and a first lens schematic diagram;

[0048] Fig.10 for Figure 5 a cross-sectional view in the anterior-posterior direction;

[0049] Fig.11 for Figure 5 A cross-sectional view in the left and right directions;

[0050] Fig.12It is a schematic diagram of the structure of the self-locking mechanism;

[0051] Fig.13 It is a three-dimensional schematic diagram of a liquid tank;

[0052] Fig.14 A cross-sectional view of the liquid tank.

[0053] Reference numerals:

[0054] L1-transmission liquid pool, 1-liquid tank fixing device, 2-base, 20-lens hole, 21-bearing, 22-rotating axis, 3-upper cover, 30-threaded hole, 31-fixing nut, 32-center hole, 4-transmission assembly, 40-synchronous belt transmission device, 401-synchronous seat, 402-synchronous wheel, 403-synchronous belt, 41-first transmission device, 410-first transmission seat, 411-first transmission body, 42-second transmission body, 5-liquid chamber, 6-first sealing ring, 7-liquid inlet channel, 8-liquid outlet channel, 9-first lens, 10-second lens, 11-guide column, 12-knob, 13-telescopic steel ball, 14-fixing block, 15-accommodating block, 21-second sealing ring;

[0055] L2-attenuated total reflection liquid pool, 14-liquid tank, 140-input channel, 141-output channel, 15-receiving base;

[0056] 16-liquid inlet and outlet device, 160-liquid inlet container, 161-liquid outlet container, 162-liquid inlet pipe, 163-liquid outlet pipe, 164-first dual-channel peristaltic pump, 165-second dual-channel peristaltic pump, 166-host, 167-gap regulating valve, 1670-adjusting member, 1671-screw, 1672-nut, 17-first liquid inlet clamp valve, 18-first liquid outlet clamp valve, 19-second liquid inlet clamp valve, 20-second liquid outlet clamp valve. DETAILED DESCRIPTION

[0057] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited to these embodiments.

[0058] Example 1

[0059] See also Figures 1 to 12 As shown,

[0060] An automatic sampling system for transmission and reflection dual accessories of an infrared spectrometer, comprising a liquid inlet and outlet device 16 and a liquid pool device;

[0061] The liquid pool device comprises an attenuated total reflection liquid pool L2 and a transmission liquid pool L1. Both the attenuated total reflection liquid pool L2 and the transmission liquid pool L1 are provided with a liquid cavity 5 for containing liquid, and the liquid cavity 5 is also provided with a liquid inlet channel 7 and a liquid outlet channel 8.

[0062] The liquid inlet and outlet device 16 includes a liquid inlet container 160, a liquid outlet container 161, a liquid inlet pipe 162, a liquid outlet pipe 163 and a first dual-channel peristaltic pump 164 and a second dual-channel peristaltic pump 165. The dual-channel peristaltic pump has two liquid inlets and two liquid outlets. The two liquid inlets of the first dual-channel peristaltic pump 164 are connected to one or two liquid inlet containers 160 through the liquid inlet pipe 162, the two liquid outlets of the first dual-channel peristaltic pump 164 are connected to the liquid inlet channels 7 of the attenuated total reflection liquid pool L2 and the transmission liquid pool L1 through the liquid inlet pipe 162, the two liquid outlets of the second dual-channel peristaltic pump 165 are connected to the liquid outlet channels 8 of the attenuated total reflection liquid pool L2 and the transmission liquid pool L1, and the two liquid outlets of the second dual-channel peristaltic pump 165 are connected to one or two liquid inlet containers 160 through a discharge pipe.

[0063] From the above, it can be seen that the dual-channel peristaltic pump can be connected to two liquid pools at the same time and operate on the two liquid pools at the same time. The conditions of the two connected liquid pools can be as follows: Figure 2 The two liquid pools shown are both attenuated total reflection liquid pools or Figure 3 The two liquid cells shown are both transmissive liquid cells or Figure 1 One is an attenuated total reflection liquid pool and the other is a transmission liquid pool, which enables simultaneous reflection detection or transmission detection or one is reflection and the other is transmission. The liquid intake is controlled by starting and shutting down the first dual-channel peristaltic pump.

[0064] The number of the liquid inlet containers and the liquid outlet containers mentioned above connected to the dual-channel peristaltic pump can be one liquid inlet container and one liquid outlet container or two liquid inlet containers and two liquid outlet containers. When detecting the same liquid, only one liquid inlet container and liquid outlet container are needed; when detecting two different liquids, two liquid inlet containers and two liquid outlet containers are required.

[0065] Taking into account the combination of connected liquid pools, the number of liquid inlet containers and liquid outlet containers, and the different liquids in the containers, the system can detect one liquid entirely using the reflection method or the transmission method, or detect one liquid simultaneously using the reflection method and the transmission method; the system can also detect two different liquids simultaneously, and the test method can be selected according to the combination of the liquid pools.

[0066] Furthermore, a first liquid inlet pinch valve 17, a first liquid outlet pinch valve 18, a second liquid inlet pinch valve 19, and a second liquid outlet pinch valve 20 are further provided below the first dual-channel peristaltic pump 164 and the second dual-channel peristaltic pump 165;

[0067] The first liquid inlet clamping valve 17 clamps a liquid inlet pipe 162 connecting a liquid pool and the liquid inlet channel 7, and the second liquid inlet clamping valve 19 clamps another liquid inlet pipe 162 connecting another liquid pool and the liquid inlet channel 7, thereby controlling the opening and closing of the liquid inlet pipe 162.

[0068] The first liquid outlet clamping valve 18 clamps a liquid outlet pipe 163 connecting a liquid pool and the liquid outlet channel 8, and the second liquid outlet clamping valve 20 clamps another liquid outlet pipe 163 connecting another liquid pool and the liquid outlet channel 8, thereby controlling the opening and closing of the liquid outlet pipe 163.

[0069] When liquid needs to be transported to a liquid pool, the first liquid inlet pinch valve or the second liquid inlet pinch valve needs to be opened. When liquid needs to be recovered from a liquid pool, the first liquid outlet pinch valve or the second liquid outlet pinch valve needs to be opened. The pinch valves mentioned above can prevent the liquid in the inlet pipe or the outlet pipe from flowing back after the dual-channel peristaltic pump is closed, resulting in insufficient amount of liquid to be measured in the liquid chamber.

[0070] Furthermore, the liquid inlet and outlet device also includes a body and a gap regulating valve, and the gap regulating valve includes a regulating member, a screw rod and a nut;

[0071] The liquid inlet and outlet device 16 further includes a gap regulating valve 167, two of which are respectively arranged below the first dual-channel peristaltic pump 164 and the second dual-channel peristaltic pump 165, and the gap regulating valve 167 includes a regulating member 1670, a screw 1671 and a nut 1672;

[0072] The roller 21 of the dual-channel peristaltic pump is rotatably disposed on the host 166;

[0073] The adjusting member 1670 is provided with a cavity capable of accommodating the roller 21, and the inner wall of the adjusting member 1670 and the roller 21 can clamp or release the liquid inlet pipe 162 or the liquid outlet pipe 163; the adjusting member 1670 can be movably connected to the main machine 166 around a rotating axis to adjust the clamping gap between the inner wall of the adjusting member 1670 and the roller 21;

[0074] The screw rod 1671 is vertically fixed on the machine body, and the nut 1672 is threadedly connected to the screw rod 1671 and supports the adjusting member 1670;

[0075] When the nut 1672 is lifted or lowered relative to the screw rod 1671 , it can drive the adjusting member 1670 to rotate around the rotation axis.

[0076] Furthermore, the transmission liquid pool L1 includes a base 2, an upper cover 3 with a first lens 9, a rotating shaft 22, and a second lens 10, and is characterized in that the base 2 is provided with a rotating shaft 22 on the left and right sides, and the rotating shaft 22 passes through the upper cover 3. The second lens 10 is placed on the base 2 and is located directly below the first lens 9. When the rotating shaft 22 rotates itself, the rotating shaft 22 can enable the upper cover 3 to drive the first lens 9 to move up and down to adjust the distance between the first lens 9 and the second lens 10.

[0077] Furthermore, the base 2 is provided with a second lens hole 20, the second lens 10 is placed on the second lens hole 20, holes for installing bearings 21 are also provided on both sides of the second lens hole 20, the rotating shaft 22 is arranged on the bearings 21, and a transmission component 4 capable of driving the rotating shaft 22 to rotate is also arranged on the surface of the base 2, and a knob 12 is arranged at one end of the transmission component 4.

[0078] The transmission assembly 4 is driven by rotating the knob 12 , and the transmission assembly 4 drives the rotating shaft 22 to rotate.

[0079] Furthermore, the liquid tank fixing device 1 is placed on the base 2 and the liquid tank fixing device 1 includes a fixing block 14 and a receiving block 15 that passes through from top to bottom. The fixing block 14 is located on both sides of the liquid tank fixing device 1 and is fixedly installed with a vertical guide column 11. The receiving block 15 is located at the center of the liquid tank fixing device 1 and presses against the second lens 10. The receiving block 15 has two small holes at the position where it presses against the top wall of the second lens 10, which are respectively connected to the liquid inlet channel 7 and the liquid outlet channel 8. A second sealing ring 21 is arranged around the contact surface, and a first sealing ring 6 is installed on the inner circumferential wall of the receiving block 15. The liquid tank fixing device 1 reserves an accommodating space for the transmission assembly 4 on the base 2. A telescopic steel ball is installed on the outer surface of the liquid tank fixing device 1, which can match the concave surface of the knob 12 facing the liquid tank fixing device 1.

[0080] The liquid inlet channel 7 and the liquid outlet channel 8 prevent the operator from contacting the liquid to be tested, so as to prevent the toxic and volatile liquid to be tested from causing harm to the operator. The first sealing ring 6 is provided to prevent the liquid to be tested from overflowing upward or to the surrounding due to excessive addition of the liquid to be tested;

[0081] When the force of twisting the knob 12 is large, the plane inside the knob 12 will squeeze the telescopic steel ball 13, causing the telescopic steel ball 13 to shrink and thus rotate the knob 12. The purpose of self-locking is to prevent accidental touch from changing the distance between the first lens 9 and the second lens 10.

[0082] Furthermore, small holes are opened on the left and right sides of the upper cover 3 and are sleeved on the guide column 11 through the small holes. The rotating shaft 22 passes through the threaded hole 30 on the upper cover 3. The first lens 9 is fixed to the upper cover 3 by a fixing nut 31 and is coaxial with the central hole 32 of the upper cover 3. The second lens hole 20, the accommodating block 15 that passes through the upper and lower parts, and the central hole 32 of the upper cover 3 are coaxial and the first lens 9 is inserted in the accommodating block 15 of the liquid storage fixing device 1. The lower wall of the first lens 9, the top wall of the second lens 10 and the surrounding wall of the accommodating block form a closed liquid cavity 5 for accommodating liquid.

[0083] In addition to the guiding function, the guide column 11 also has the function of limiting the upper cover 3, preventing the upper cover 3 from rotating along with the rotating shaft 22 matching the threaded hole 30, so that the upper cover 3 can only move up and down, driving the first lens 9 fixed on the upper cover 3 to move up and down to adjust the distance between the first lens 9 and the second lens 10.

[0084] Furthermore, the transmission assembly includes 4 synchronous belt transmission devices 40, a first transmission device 41, and a second transmission device, which are synchronously installed on the left and right sides of the surface of the base 2 near the edge, the output end of the synchronous belt transmission device 40 is connected to the first transmission device 41, and the second transmission device is fixed on the rotating shaft 22 and the second transmission device is in contact with and meshing with the first transmission device 41.

[0085] The synchronous belt transmission device 40 includes a synchronous seat 401, a synchronous wheel 402, and a synchronous belt 403. The synchronous seat 401 is installed on the surface of the base 2 of the liquid bin fixing device 1. The synchronous wheel 402 is fixedly set on the synchronous seat 401 and the output end passes through the synchronous seat 401. The other end passes through the liquid bin fixing device 1 and is installed with a knob 12. The synchronous belt 403 bypasses the synchronous wheel 402 and is set on the synchronous wheel 402.

[0086] The first transmission device 41 includes a first transmission seat 410 and a first transmission body 411 . The first transmission seat 410 is coaxial with the synchronous seat 401 . The first transmission body 411 is installed on the transmission seat and fixedly connected to the synchronous wheel 402 .

[0087] The second transmission device includes a second transmission body 42 fixed on the rotating shaft 22 , and the second transmission body 42 is meshed with the first transmission body 411 .

[0088] The first transmission body 411 is a worm transmission device or a bevel gear transmission device, and the second transmission body 42 is a worm gear transmission device or a bevel gear transmission device.

[0089] The knob 12 is arranged on one side of the synchronous wheels 402, and a synchronous belt 403 is wound around the two synchronous wheels 402. The first transmission body 411 is installed at the output end of the synchronous wheel 402 and the second transmission body 42 is fixed on the rotating shaft 22. The second transmission body 42 is meshed with the first transmission body 411. Therefore, when the knob 12 is rotated, the synchronous wheel 402 on one side will be driven to rotate, and the synchronous wheel 402 on the other side will be driven to rotate together through the synchronous belt 403. The first transmission body 411 connected to the two synchronous wheels 402 will rotate together, and the second transmission body 42 meshed with the first transmission body 411 will rotate to cause the rotating shaft 22 to rotate.

[0090] like Figure 6 When the first transmission body 411 is a worm gear transmission device, the second transmission body 42 is a worm gear transmission device. Figure 7 As shown, when the first transmission body 411 is a bevel gear transmission device, the second transmission body 42 is a bevel gear transmission device.

[0091] Furthermore, the attenuated total reflection liquid pool L2 includes a liquid tank 14 with an opening at the lower end;

[0092] The bottom of the liquid tank 14 is in contact with the total reflection mirror, and a closed liquid pool is formed between the inner cavity of the liquid tank 14 and the total reflection mirror at the bottom of the receiving base 15. The peripheral wall of the liquid tank 14 is provided with an input channel 140 and an output channel 141. One end of the input channel 140 and the output channel 141 are connected to the liquid pool, and the other end is respectively connected to the liquid inlet pipe 162 and the liquid outlet pipe 163. Specifically, the specific structure of the attenuated total reflection liquid pool can be found in the patent document with announcement number CN220473373U.

[0093] Furthermore, a detection method using an automatic sampling system for transmission and reflection dual accessories of an infrared spectrometer as described in any one of claims 1 to 9 comprises the following steps:

[0094] S1. Connect the attenuated total reflection liquid pool L2 and the transmission liquid pool L1 to a dual-channel peristaltic pump.

[0095] S2. Start the first dual-channel peristaltic pump 164, and the blank liquid in the liquid inlet container 160 is transported to the attenuated total reflection liquid pool L2 and the transmission liquid pool L1 through the liquid inlet pipe 162. The first dual-channel peristaltic pump 164 is turned off, and the second dual-channel peristaltic pump 165 is started. The blank liquid in the reflection liquid pool and the transmission liquid pool L1 is recovered through the liquid outlet pipe 163 and enters the liquid outlet container 161.

[0096] S3. Start the first dual-channel peristaltic pump 164 again to transport the test liquid in the other liquid inlet container 160 to the reflective liquid pool and the transmission liquid pool L1. When there is enough test liquid in the liquid pool, turn off the first dual-channel peristaltic pump 164, and close the liquid inlet pipe 162 through the first liquid inlet clamp valve 17 and the second liquid inlet clamp valve 19 to prevent backflow.

[0097] S4. Emit infrared light to the reflective liquid pool and the transmissive liquid pool L1 to detect the liquid to be tested.

[0098] S5. After the detection is completed, the second dual-channel peristaltic pump 165 is turned on to discharge the detected liquid in the attenuated total reflection liquid pool L2 and the transmission liquid pool L1 and recover it to the liquid outlet container 161 through the discharge pipe.

[0099] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An automatic sampling system for transmission and reflection dual accessories of infrared spectrometer, characterized in that: It includes a liquid inlet and outlet device (16) and a liquid pool device; The liquid pool device comprises an attenuated total reflection type liquid pool (L2) and a transmission type liquid pool (L1), wherein the attenuated total reflection type liquid pool (L2) and the transmission type liquid pool (L1) are both provided with a liquid cavity (5) for accommodating liquid, and the liquid cavity (5) is also provided with a liquid inlet channel (7) and a liquid outlet channel (8); The liquid inlet and outlet device (16) comprises a liquid inlet container (160), a liquid outlet container (161), a liquid inlet pipe (162), a liquid outlet pipe (163), a first dual-channel peristaltic pump (164), and a second dual-channel peristaltic pump (165). The dual-channel peristaltic pump has two liquid inlets and two liquid outlets. The two liquid inlets of the first dual-channel peristaltic pump (164) are connected to the same or different liquid inlet containers (160) via the liquid inlet pipe (162). The first dual-channel peristaltic pump The two liquid outlets of the second dual-channel peristaltic pump (165) are connected to the liquid outlet channels (8) of the attenuated total reflection type liquid pool (L2) and the transmission type liquid pool (L1) through a liquid inlet pipe (162), and the two liquid outlets of the second dual-channel peristaltic pump (165) are connected to the liquid outlet channels (8) of the attenuated total reflection type liquid pool (L2) and the transmission type liquid pool (L1). The two liquid outlets of the second dual-channel peristaltic pump (165) are connected to the same or different liquid inlet containers (160) through a liquid discharge pipe.

2. According to the automatic sampling system for transmission and reflection dual accessories of infrared spectrometer described in claim 1, it is characterized in that: A first liquid inlet clamping valve (17), a first liquid outlet clamping valve (18), a second liquid inlet clamping valve (19), and a second liquid outlet clamping valve (20) are also provided below the first dual-channel peristaltic pump (164) and the second dual-channel peristaltic pump (165); The first liquid inlet clamping tube valve (17) clamps a liquid inlet tube (162) connecting a liquid pool and a liquid inlet channel (7), and the second liquid inlet clamping tube valve (19) clamps a liquid inlet tube (162) connecting another liquid pool and a liquid inlet channel (7), thereby controlling the opening and closing of the liquid inlet tube (162); The first liquid outlet clamping valve (18) clamps a liquid outlet tube (163) connecting a liquid pool and a liquid outlet channel (8), and the second liquid outlet clamping valve (20) clamps a liquid outlet tube (163) connecting another liquid pool and a liquid outlet channel (8), thereby controlling the opening and closing of the liquid outlet tube (163).

3. According to the automatic sampling system for transmission and reflection dual accessories of infrared spectrometer described in claim 2, it is characterized in that: The liquid inlet and outlet device (16) further comprises a main machine (166) and a clearance regulating valve (167). Two clearance regulating valves (167) are respectively arranged below the first dual-channel peristaltic pump (164) and the second dual-channel peristaltic pump (165). The clearance regulating valve (167) comprises a regulating member (1670), a screw (1671) and a nut (1672). The roller of the dual-channel peristaltic pump is rotatably arranged on the host (166); The adjusting member (1670) is provided with a cavity capable of accommodating the roller, and the inner wall of the adjusting member (1670) and the roller are capable of clamping or releasing the liquid inlet pipe (162) or the liquid outlet pipe (163); the adjusting member (1670) is capable of being rotatably connected to the main machine (166) around the first side to adjust the clamping gap between the inner wall of the adjusting member (1670) and the roller; The screw rod (1671) is fixed on the machine body in a vertical orientation, and the nut (1672) is threadedly connected to the screw rod (1671) and supports the adjusting member (1670); When the nut (1672) is lifted or lowered relative to the screw rod (1671), it can drive the adjusting member (1670) to rotate around the first side.

4. According to the automatic sampling system for transmission and reflection dual accessories of infrared spectrometer described in claim 1, it is characterized in that: The transmission liquid pool (L1) comprises a base (2), an upper cover (3) with a first lens (9), a rotating shaft (22), and a second lens (10), and is characterized in that the base (2) is provided with a rotating shaft (22) on both sides, the rotating shaft (22) passes through the upper cover (3), the second lens (10) is placed on the base (2) and is located directly below the first lens (9), and when the rotating shaft (22) rotates, the rotating shaft (22) can enable the upper cover (3) to drive the first lens (9) to move up and down, so as to adjust the distance between the first lens (9) and the second lens (10).

5. According to the automatic sampling system for transmission and reflection dual accessories of infrared spectrometer described in claim 4, it is characterized in that: The base (2) is provided with a second lens hole (20), the second lens (10) is placed on the second lens hole (20), holes for arranging bearings (21) are also provided on both sides of the second lens hole (20), the rotating shaft (22) is arranged on the bearings (21), and a transmission assembly (4) capable of driving the rotating shaft (22) to rotate is also arranged on the surface of the base (2), and a knob (12) is arranged at one end of the transmission assembly (4).

6. The automatic sampling system for transmission and reflection dual accessories of infrared spectrometer according to claim 5, characterized in that: The invention comprises a liquid bin fixing device (1), wherein the liquid bin fixing device (1) is placed on a base (2) and comprises a fixing block (14) and a receiving block (15) which is connected vertically. The fixing blocks (14) are located on both sides of the liquid bin fixing device (1) and are fixedly mounted with vertical guide columns (11). The receiving block (15) is located at the center of the liquid bin fixing device (1) and presses against a second lens (10). The receiving block (15) has two small holes at a position where it presses against the top wall of the second lens (10) and is respectively connected to a liquid inlet channel (7) and a liquid outlet channel (8). A second sealing ring (21) is arranged around the contact surface. A first sealing ring (6) is arranged on the inner peripheral wall of the receiving block (15). The liquid bin fixing device (1) reserves a space for accommodating a transmission component (4) on the base (2). A telescopic steel ball is arranged on the outer surface of the liquid bin fixing device (1) and can match a concave surface of a knob (12) facing the liquid bin fixing device (1).

7. The automatic sampling system for transmission and reflection dual accessories of infrared spectrometer according to claim 5, characterized in that: The upper cover (3) is provided with small holes on both sides thereof and is sleeved on the guide column (11) through the small holes; the rotating shaft (22) passes through the threaded hole (30) on the upper cover (3); the first lens (9) is fixed to the upper cover (3) by a fixing nut (31) and is coaxial with the central hole (32) of the upper cover (3); the second lens hole (20), the accommodating block (15) which passes through the upper and lower parts, and the central hole (32) of the upper cover (3) are coaxial and the first lens (9) is inserted into the accommodating block (15) of the liquid storage fixing device (1); the lower wall of the first lens (9), the top wall of the second lens (10) and the peripheral wall of the accommodating block (15) form a closed liquid chamber (5) for accommodating liquid.

8. The automatic sampling system for transmission and reflection dual accessories of infrared spectrometer according to claim 5, characterized in that: The transmission assembly (4) comprises a synchronous belt transmission device (40), a first transmission device (41), and a second transmission device (42), wherein the synchronous belt transmission device (40) is installed at positions close to the edges on both sides of the surface of the base (2), the output end of the synchronous belt transmission device (40) is connected to the first transmission device (41), the second transmission device is fixed on the rotating shaft (22), and the second transmission device (42) is in contact with and meshed with the first transmission device (41); The synchronous belt transmission device (40) comprises a synchronous seat (401), a synchronous wheel (402), and a synchronous belt (403); the synchronous seat (401) is mounted on the surface of the base (2) of the liquid bin fixing device (1); the synchronous wheel (402) is fixedly arranged on the synchronous seat (401) and the output end passes through the synchronous seat (401); the other end passes through the liquid bin fixing device (1) and is installed with a knob (12); the synchronous belt (403) passes around the synchronous wheel (402) and is arranged on the synchronous wheel (402); The first transmission device (41) comprises a first transmission seat (410) and a first transmission body (411); the first transmission seat (410) is coaxial with the synchronous seat (401); the first transmission body (411) is mounted on the transmission seat and fixedly connected to the synchronous wheel (402); The second transmission device (42) comprises a second transmission body (42) fixed on the rotating shaft (22), and the second transmission body (42) is meshed with the first transmission body (411); The first transmission body (411) is a worm transmission device or a bevel gear transmission device, and the second transmission body (42) is a worm gear transmission device or a bevel gear transmission device.

9. The automatic sampling system for transmission and reflection dual accessories of infrared spectrometer as claimed in claim 1, characterized in that: The attenuated total reflection type liquid pool (L2) comprises a liquid tank (14) with an opening at the bottom; the bottom of the liquid tank (14) is in contact with a total reflection mirror, a closed liquid tank is formed between the inner cavity of the liquid tank (14) and the total reflection mirror at the bottom of the receiving base (15), an input channel (140) and an output channel (141) are provided on the peripheral wall of the liquid tank (14), one end of the input channel (140) and the output channel (141) are in communication with the liquid tank, and the other end is connected to a liquid inlet pipe (162) and a liquid outlet pipe (163) respectively.

10. A detection method using the automatic sampling system for transmission and reflection dual accessories of an infrared spectrometer as claimed in any one of claims 1 to 9, characterized in that: The steps include: S1. Connect the reflective liquid pool and the transmissive liquid pool (L1) to a dual-channel peristaltic pump; S2. The first dual-channel peristaltic pump (164) is started, and the blank liquid in the liquid inlet container (160) is transported to the reflective liquid pool and the transmissive liquid pool (L1) through the liquid inlet pipe (162). The first dual-channel peristaltic pump (164) is turned off, and the second dual-channel peristaltic pump (165) is started, and the blank liquid in the reflective liquid pool and the transmissive liquid pool (L1) is recovered through the liquid outlet pipe (163) and enters the liquid outlet container (161); S3. Start the first dual-channel peristaltic pump (164) again to transfer the test liquid in the other liquid inlet container (160) to the reflective liquid pool and the transmissive liquid pool (L1). When the test liquid in the liquid pool is sufficient, close the first dual-channel peristaltic pump (164), and close the liquid inlet pipe (162) through the first liquid inlet pinch valve (17) and the second liquid inlet pinch valve (19) to prevent backflow; S4. emitting infrared light to the reflective liquid pool and the transmissive liquid pool (L1) to detect the liquid to be tested; S5. After the detection is completed, the second dual-channel peristaltic pump (165) is turned on to discharge the detected liquid in the reflective liquid pool and the transmissive liquid pool (L1) and recover it into the liquid outlet container (161) through the discharge pipe.

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