Adjustable liquid pool for transmission of infrared spectrometer

Abstract

The novel adjustable liquid pool for transmission of the infrared spectrometer is mainly composed of a liquid bin fixing device, a base, an upper cover, a transmission assembly, a first lens and a second lens. A rotary knob is arranged on a transmission assembly, the transmission assembly is controlled by rotating the rotary knob, the transmission assembly drives a rotating shaft to rotate, the rotating shaft and a lifting nut of an upper cover are matched with a guide column to form a similar lead screw structure, the upper cover can move up and down along with rotation of the rotating shaft, and a first lens is fixed to the upper cover through a fixing nut and can also ascend and descend up and down. The optical path of a liquid pool between the first lens and the second lens can be accurately adjusted, a spring pin on the liquid bin fixing device and a concave surface of a knob on the knob device can realize rapid self-locking, and the device is convenient to operate and can meet higher requirements of modern infrared spectroscopic analysis on liquid sample detection.

Description

Technical Field

[0001] The invention relates to the technical field of infrared spectrometers, and in particular to an adjustable liquid pool for transmission of infrared spectrometers. 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 fixed structures 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 intensity. However, fixed-structure liquid pools cannot meet such diverse needs.

[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 error and degradation of sealing performance caused by repeated disassembly. Summary of the invention

[0005] The object of the present invention is to provide an adjustable liquid cell for transmission of an infrared spectrometer, which can adjust the optical path to meet the needs of different detection samples and avoid optical path error and sealing performance degradation caused by repeated disassembly.

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

[0007] An adjustable liquid pool for transmission of an infrared spectrometer comprises a base, an upper cover with a first lens, a rotating shaft, and a second lens. The base is provided with rotating shafts on the left and right sides, the rotating shafts penetrate 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, so as to adjust the distance between the first lens and the second lens.

[0008] The upper cover and the first lens are taken as a whole, and the upper cover is raised and lowered by rotating the rotating shaft, thereby moving the first lens up and down. The second lens is placed directly below the first lens, so that the distance between the two lenses can be adjusted.

[0009] Furthermore, it also includes a liquid bin fixing device, which is placed on the base and includes a fixing block and a receiving block with upper and lower through holes.

[0010] Furthermore, the upper cover is provided with a first lens hole, the first lens is coaxial with the first lens hole, a second lens is provided directly below the first lens, the second lens is placed on the base, the base is provided with a second lens hole at the location where the second lens is placed, the first lens is inserted into the accommodating block, the first lens hole and the second lens hole are coaxial, the bottom wall of the first lens, the top wall of the second lens and the peripheral wall of the accommodating block form a closed liquid cavity for accommodating liquid.

[0011] Furthermore, the rotating shaft is arranged on the bearing of the base, the rotating shaft is connected to the transmission assembly on the surface of the base, the rotating shaft is parallel to the first lens axis and is inserted into the threaded hole opened in the upper cover.

[0012] Furthermore, the fixing blocks are located on both sides of the liquid bin fixing device, and vertical guide columns are fixedly installed on the fixing blocks, and the guide columns penetrate the upper cover.

[0013] Furthermore, the accommodating block is provided with a first aperture hole and a second aperture hole, the first aperture hole is used to place the first lens, the inner wall of the first aperture hole is also provided with a first sealing member, the second aperture hole is used to accommodate the second lens, the contact surface between the second aperture hole and the second lens is provided with a second sealing member, and the aperture of the second aperture hole is larger than the aperture of the first aperture hole.

[0014] Further, the transmission assembly includes a synchronous belt transmission device, a first transmission device, and a second transmission body, wherein the synchronous belt transmission device is installed on the surface of the base, the output end of the synchronous belt transmission device is connected to the first transmission device, and the other end passes through the liquid tank fixing device and is provided with a knob, and the second transmission body is fixed on the rotating shaft;

[0015] 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.

[0016] 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;

[0017] The second transmission body contacts and meshes with the first transmission device.

[0018] Furthermore, the peripheral wall of the liquid cavity connects the liquid inlet channel and the liquid outlet channel, and the liquid inlet channel and the liquid outlet channel pass through the side of the liquid bin fixing device.

[0019] Furthermore, a concave surface is provided on the side of the knob facing the liquid bin fixing device, a groove is provided on the surface of the liquid bin fixing device to install a spring pin, a steel ball is provided on the end of the spring pin not connected to the groove, and the concave surface can clamp the steel ball on the spring pin.

[0020] Furthermore, the first transmission body is a worm transmission or a bevel gear transmission, and the second transmission body is a worm gear transmission or a bevel gear transmission.

[0021] The present invention has the beneficial effects:

[0022] By rotating the knob, the transmission assembly drives the rotating shaft to rotate, thereby driving the upper cover to move up and down, so that the first lens installed on the upper cover can also move up and down to adjust the height between the two lenses, thereby achieving the adjustment of the optical path without disassembly.

[0023] The liquid chamber is a closed chamber surrounded by the bottom wall of the first lens, the top wall of the second lens and the peripheral wall of the accommodating chamber, and the liquid inlet channel and the liquid outlet channel are connected on both sides of the liquid chamber, so that the operating personnel do not need to directly contact the liquid, thereby ensuring the safety of the operating personnel when detecting toxic, harmful and volatile liquids. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of an adjustable liquid pool for transmission of an infrared spectrometer according to the present invention;

[0025] Figure 2 It is a three-dimensional diagram of the present invention without the upper cover installed;

[0026] Figure 3 The schematic diagram of the transmission assembly components on the base is a worm gear and a first lens;

[0027] Figure 4 The transmission assembly components on the base are a bevel gear and a first lens schematic diagram;

[0028] Figure 5 for Figure 1 a cross-sectional view in the anterior-posterior direction;

[0029] Figure 6 for Figure 1 A cross-sectional view in the left and right directions;

[0030] Figure 7 It is a schematic diagram of the self-locking mechanism structure.

[0031] Reference numerals:

[0032] 1-liquid tank fixing device, 2-base, 20-second lens hole, 21-bearing, 22-rotating axis, 3-upper cover, 30-threaded hole, 31-fixing nut, 32-first lens 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 member, 7-liquid inlet channel, 8-liquid outlet channel, 9-first lens, 10-second lens, 11-guide column, 12-knob, 13-spring pin, 14-fixing block, 15-accommodating block, 16-second sealing member. DETAILED DESCRIPTION

[0033] 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.

[0034] Example 1

[0035] See also Figures 1 to 6 As shown,

[0036] An adjustable liquid pool for transmission of an infrared spectrometer comprises a base 2, an upper cover 3 with a first lens 9, a rotating shaft 22, and a second lens 10. The base 2 is provided with rotating shafts 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, 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.

[0037] Furthermore, it also includes a liquid bin fixing device 1, which is placed on the base 2, and includes a fixing block 14 and a receiving block 15 with upper and lower through holes.

[0038] Furthermore, the upper cover 3 is provided with a first lens hole 32, the first lens 9 is coaxial with the first lens hole 32, a second lens 10 is provided directly below the first lens 9, the second lens 10 is placed on the base 2, the base 2 is provided with a second lens hole 20 at the location where the second lens 10 is placed, the first lens 9 is inserted into the receiving block 15, the first lens hole 32 and the second lens hole 20 are coaxial, the bottom wall of the first lens 9 and the top wall of the second lens 10 and the peripheral wall of the receiving block 15 form a closed liquid chamber 5 for containing liquid. The second lens 10 is placed on the second lens hole 20, so that the light of the infrared spectrometer passes through the second lens 10 and passes out from the second lens hole 20 to reach the receiving end of the infrared spectrometer.

[0039] Furthermore, the rotating shaft 22 is disposed on the bearing 21 of the base 2 , the rotating shaft 22 is connected to the transmission assembly 4 on the surface of the base 2 , the rotating shaft 22 is parallel to the axis of the first lens 9 and is inserted into the threaded hole 30 provided in the upper cover 3 .

[0040] The bearing 21 is installed below the rotating shaft 22 in order to support the rotating shaft 22 through the bearing 21 , reduce the friction coefficient of the rotating shaft 22 during movement, and ensure the rotation accuracy.

[0041] Furthermore, the fixing blocks 14 are located at two sides of the liquid bin fixing device 1 , and the fixing blocks 14 are fixedly mounted with vertical guide columns 11 , which penetrate the upper cover 3 .

[0042] 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.

[0043] Furthermore, the accommodating block 15 is provided with a first aperture hole and a second aperture hole, the first aperture hole is used to place the first lens 9, the inner wall of the first aperture hole is also provided with a first sealing member 6, the second aperture hole is used to accommodate the second lens 10, the contact surface between the second aperture hole and the second lens 10 is also provided with a second sealing member 16, and the aperture of the second aperture hole is larger than the aperture of the first aperture hole. The sealing ring 6 is provided to prevent the liquid from overflowing upward or to the periphery due to excessive addition of the liquid to be tested.

[0044] Further, the transmission assembly 4 includes a synchronous belt transmission device 40, a first transmission device 41, and a second transmission body 42. The synchronous belt transmission device 40 is installed on the surface of the base 2. The output end of the synchronous belt transmission device 40 is connected to the first transmission device 41, and the other end passes through the liquid tank fixing device 1 and is equipped with a knob 12. The second transmission body 42 is fixed on the rotating shaft 22.

[0045] 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 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 bypasses the synchronous wheel 402 and is arranged on the synchronous wheel 402.

[0046] 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.

[0047] The second transmission body 42 contacts and meshes with the first transmission device 41 .

[0048] The synchronous seat 401 is equivalent to a mounting seat for mounting and placing the synchronous wheel 402. When the synchronous wheel 402 with the knob 12 mounted thereon rotates due to the knob 12, the synchronous belt 403 will drive the synchronous wheel 402 on the other side to rotate synchronously, ensuring that the rotation states of the two sides are consistent.

[0049] The first transmission seat 410 supports the first transmission body 411 . The first transmission body 411 is installed on the output end of the synchronous wheel 402 . When the synchronous wheel 402 rotates, it drives the first transmission body 411 to rotate together.

[0050] The second transmission body 42 is meshed with the first transmission body 411 . When the first transmission body 411 rotates, the second transmission body 42 will also rotate together. Since the second transmission body 42 is fixed on the rotating shaft 22 , the rotating shaft 22 will be rotated together.

[0051] Furthermore, the peripheral wall of the liquid chamber 5 is connected with a liquid inlet channel 7 and a liquid outlet channel 8, and the liquid inlet channel 7 and the liquid outlet channel 8 pass through the side of the liquid bin fixing device 1. The liquid inlet channel 7 and the liquid outlet channel 8 prevent the operator from directly contacting the liquid to be tested, so as to prevent the toxic and harmful volatile liquid to be tested from causing harm to the operator.

[0052] Furthermore, a concave surface is provided on the side of the knob 12 facing the liquid bin fixture 1, a groove is provided on the surface of the liquid bin fixture 1 to accommodate a spring pin 13, a steel ball is provided on the end of the spring pin 13 not connected to the groove, and the concave surface can clamp the steel ball on the spring pin 13.

[0053] When the force of twisting the knob is large, the plane inside the knob will squeeze the steel ball at the end of the spring pin 13, causing the spring pin 13 to shrink. When the concave surface comes, the spring pin 13 returns to its original state and pushes the steel ball at the end into the groove, so that the groove and the steel ball match each other, thereby achieving self-locking of the knob. The purpose of self-locking is to prevent accidental touch from causing the distance between the first lens 9 and the second lens 10 to change.

[0054] Further, the first transmission body 411 is a worm gear or a bevel gear, and the second transmission body 42 is a worm wheel or a bevel gear. When the first transmission body 411 is a worm, the second transmission body 42 should be a worm wheel, and when the first transmission body 41 is a bevel gear, the second transmission body 42 should also be a bevel gear.

[0055] Example 2

[0056] When it is necessary to perform infrared quantitative detection on dimethyl silicone oil, the dimethyl silicone oil reference substance is injected into the liquid cavity 5 through the liquid inlet channel 7, and then the liquid pool is placed on the infrared spectrometer for testing, and then the knob 12 on the liquid pool is adjusted in real time according to the test spectrum, so that the transmission component 4 drives the rotating shaft 22 to rotate itself, and the rotating shaft 22 is fixed on the bearing 21 of the base 2, so the rotating shaft 22 will not move up and down, nuts are provided on both sides of the rotating shaft 22, and the liquid tank fixing device 1 and the upper cover 3 are limited by the guide column 11, so the upper cover 3 will not rotate. The above structure forms a structure similar to a screw rod, so the upper cover 3 will move up and down with the rotation of the rotating shaft 22, and the first lens 9 fixed on the upper cover 3 will also move with the upper cover 3, thereby adjusting the distance between the first lens 9 and the second lens 10 to achieve the adjustment of the optical path, so that the response of the infrared spectrometer instrument is within the ideal range, and the spring pin 13 on the liquid pool liquid tank fixing device 1 and the concave surface inside the knob 12 cooperate to form a self-locking to prevent the optical path from changing. The optical path of the dimethyl silicone oil tested on the infrared spectrometer is determined by the above operation.

[0057] Then the dimethyl silicone oil reference substance is discharged through the liquid outlet channel 8, and the liquid pool is cleaned. Then the blank, reference substance, and sample are tested again. When testing the blank, reference substance, and sample, quantitative calculations of various test substances are required. At the same time, after each test of different test samples, the liquid pool needs to be cleaned to clean off the residue of the last test liquid, so as to avoid the residual liquid from the last test affecting the liquid currently to be tested when other liquids are tested subsequently.

[0058] The present invention can flexibly adjust the optical path through a knob to achieve the best test result without the need to repeatedly disassemble and replace the gasket to try and fumble, thereby preventing the test liquid from being contaminated when replacing the gasket. The entire process is fully enclosed, which prevents the human body from directly contacting hazardous chemicals and protects the gas in the entire test space from having pungent and peculiar smells, making the tester's operation safer.

[0059] 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 adjustable liquid cell for transmission of an infrared spectrometer, comprising a base (2), an upper cover (3) with a first lens (9), a rotating shaft (22), and a second lens (10), characterized in that: The base (2) is provided with a rotating shaft (22) on the left and right 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).

2. The adjustable liquid cell for transmission of an infrared spectrometer according to claim 1, characterized in that: It also comprises a liquid bin fixing device (1), which is placed on a base (2), and comprises a fixing block (14) and a receiving block (15) having upper and lower through holes.

3. The adjustable liquid cell for transmission of an infrared spectrometer according to claim 2, characterized in that: The upper cover (3) is provided with a first lens hole (32), the first lens (9) is coaxial with the first lens hole (32), a second lens (10) is provided directly below the first lens (9), the second lens (10) is placed on the base (2), the base (2) is provided with a second lens hole (20) at a location where the second lens (10) is placed, the first lens (9) is inserted into the receiving block (15), the first lens hole (32) and the second lens hole (20) are coaxial, and the bottom wall of the first lens (9), the top wall of the second lens (10) and the peripheral wall of the receiving block (15) form a closed liquid chamber (5) for containing liquid.

4. The adjustable liquid cell for transmission of an infrared spectrometer according to claim 1, characterized in that: The rotating shaft (22) is arranged on a bearing (21) of the base (2), the rotating shaft (22) is connected to a transmission assembly (4) on the surface of the base (2), the rotating shaft (22) is parallel to the axis of the first lens (9) and is inserted into a threaded hole (30) provided in the upper cover (3).

5. The adjustable liquid cell for transmission of an infrared spectrometer according to claim 3, characterized in that: The fixing blocks (14) are located on both sides of the liquid bin fixing device (1), and the fixing blocks (14) are fixedly mounted with vertical guide columns (11), which penetrate the upper cover (3).

6. The adjustable liquid cell for transmission of an infrared spectrometer according to claim 3, characterized in that: The accommodating block (15) is provided with a first aperture hole and a second aperture hole. The first aperture hole is used to place a first lens (9). The inner wall of the first aperture hole is also provided with a first sealing member (6). The second aperture hole is used to accommodate a second lens (10). The contact surface between the second aperture hole and the second lens (10) is also provided with a second sealing member (16). The aperture of the second aperture hole is larger than the aperture of the first aperture hole.

7. The adjustable liquid cell for transmission of an infrared spectrometer according to claim 2, characterized in that: The transmission assembly (4) comprises a synchronous belt transmission device (40), a first transmission device (41), and a second transmission body (42); the synchronous belt transmission device (40) is mounted on the surface of the base (2); the output end of the synchronous belt transmission device (40) is connected to the first transmission device (41), and the other end passes through the liquid bin fixing device (1) and is provided with a knob (12); the second transmission body is fixed on the rotating shaft (22); 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 body contacts and meshes with the first transmission device (41).

8. The adjustable liquid cell for transmission of an infrared spectrometer according to claim 3, characterized in that: The peripheral wall of the liquid chamber (5) is connected to a liquid inlet channel (7) and a liquid outlet channel (8), and the liquid inlet channel (7) and the liquid outlet channel (8) pass through the side of the liquid bin fixing device (1).

9. The adjustable liquid cell for transmission of an infrared spectrometer according to claim 7, characterized in that: The knob (12) is provided with a concave surface on the side facing the liquid bin fixing device (1), and a groove is provided on the surface of the liquid bin fixing device (1) to accommodate a spring pin (13). A steel ball is provided at the end of the spring pin (13) not connected to the groove, and the concave surface can hold the steel ball on the spring pin (13).

10. The adjustable liquid cell for transmission of infrared spectrometer according to claim 5, characterized in that: The first transmission body (411) is a worm transmission or a bevel gear transmission, and the second transmission body (42) is a worm gear transmission or a bevel gear transmission.

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