Liquid pool for attenuated total reflection accessory of infrared spectrometer

Abstract

The utility model relates to the field of infrared detection, in particular to a liquid pool for an attenuated total reflection accessory of an infrared spectrometer, which comprises a liquid bin, a liquid inlet joint, a liquid outlet joint, a first liquid inlet pipe and a first liquid outlet pipe, a first internal thread groove and a second internal thread groove are formed in the outer side wall of the liquid bin and communicated with an inner cavity of the liquid bin, a first through hole is formed in the liquid inlet connector, a second through hole is formed in the liquid drainage connector, external threads are arranged on the outer walls of the liquid inlet connector and the liquid drainage connector around the through holes, and the first liquid inlet pipe is installed in the first through hole. The first liquid discharge pipe is mounted in the second through hole; the liquid inlet connector is in threaded connection with the first inner threaded groove, the first liquid inlet pipe is communicated with an inner cavity of the liquid bin, the liquid drainage connector is in threaded connection with the second inner threaded groove, and the first liquid drainage pipe is communicated with the inner cavity of the liquid bin. The liquid inlet connector and the liquid outlet connector are in threaded connection with the two internal thread grooves respectively, so that the liquid inlet pipe and the liquid outlet pipe can be easily detached, and maintenance and replacement are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to infrared detection field especially relates to a liquid pool for infrared spectrometer attenuated total reflection accessory. BACKGROUND

[0002] The liquid pool is a key component for containing and analyzing liquid samples in the infrared spectrometer, which can automatically suck in and discharge liquid samples quickly and safely, and ensure that infrared light can pass through the sample to carry out effective spectral analysis.

[0003] There is a liquid sampling device for infrared spectrometer attenuated total reflection accessory in the prior art, which comprises a connecting seat, a liquid bin and a positioning plate, the bottom of the connecting seat is fixedly connected on the infrared spectrometer attenuated total reflection accessory, the top of the positioning plate is fixedly connected with the positioning plate, a through hole matched with the shape of the liquid bin is formed on the positioning plate, the liquid bin is inserted into the through hole, and the bottom of the liquid bin abuts against the infrared spectrometer attenuated total reflection accessory, a liquid inlet pipe and a liquid outlet pipe are welded or interference-fitted on the outer side wall of the liquid bin, and the liquid inlet pipe and the liquid outlet pipe are in communication with the inner cavity of the liquid bin. The fixing system for the liquid sampling device includes a hand screw and a lower end pressure head, the hand screw is used for manually adjusting the position of the lower end pressure head, so as to apply appropriate pressure on the top sealing cover of the liquid bin, and ensure that the liquid bin and the infrared spectrometer attenuated total reflection accessory are sealed and closed.

[0004] However, in the existing liquid sampling device, the liquid inlet pipe and the liquid outlet pipe are welded or interference-fitted with the liquid bin, which makes it difficult to disassemble and replace the liquid inlet pipe and the liquid outlet pipe, and thus is not conducive to the later maintenance of the liquid inlet pipe and the liquid outlet pipe. UTILITY MODEL CONTENTS

[0005] (I) Technical problem to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a liquid pool for infrared spectrometer attenuated total reflection accessory, which solves the problem of difficult maintenance of the liquid inlet pipe and the liquid outlet pipe of the liquid pool.

[0007] (II) Technical scheme

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the main technical scheme including:

[0009] The utility model discloses an infrared spectrometer attenuated total reflection accessory liquid pool, including liquid warehouse, liquid inlet connector, liquid outlet connector, first liquid inlet pipe and first liquid outlet pipe, the outside wall of liquid warehouse is provided with first internal thread groove and second internal thread groove and communicates the internal cavity of liquid warehouse, and the first through -hole is opened to liquid inlet connector, and the second through -hole is opened to liquid outlet connector, and the outer wall of liquid inlet connector and liquid outlet connector is provided with external thread around through -hole, and first liquid inlet pipe is installed in the first through -hole, and first liquid outlet pipe is installed in the second through -hole, liquid inlet connector is connected with first internal thread groove with the threaded connection, and first liquid inlet pipe communicates with the internal cavity of liquid warehouse, and liquid outlet connector is connected with second internal thread groove with the threaded connection, and first liquid outlet pipe communicates with the internal cavity of liquid warehouse.

[0010] Optionally, further comprising a first tapered compression ring and a second tapered compression ring; the first through-hole is formed with a first tapered hole near the end of the liquid tank, which is shaped to fit the first tapered compression ring; the second through-hole is formed with a second tapered hole near the end of the liquid tank, which is shaped to fit the second tapered compression ring; the first tapered compression ring is placed in the first tapered hole, and the first tapered compression ring is sleeved on the first liquid inlet pipe; the second tapered compression ring is placed in the second tapered hole, and the second tapered compression ring is sleeved on the first liquid outlet pipe; the liquid inlet connector is connected with the first internal thread groove by screwing, and the first tapered compression ring abuts against the groove bottom of the first internal thread groove; the liquid outlet connector is connected with the second internal thread groove by screwing, and the second tapered compression ring abuts against the groove bottom of the second internal thread groove.

[0011] Optionally, further comprising a liquid tank cover covering the top opening of the liquid tank; a spherical positioning point recessed into the liquid tank is formed on the upper surface of the center position of the liquid tank cover for cooperating with the pressure head.

[0012] Optionally, the liquid tank cover has tank handle extending out of the liquid tank at both ends.

[0013] Optionally, the cavity wall of the liquid tank surrounds a liquid cavity; a second liquid inlet pipe and a second liquid outlet pipe are formed on the cavity wall of the liquid tank and communicate with the liquid inlet connector and the liquid outlet connector respectively; the second liquid inlet pipe and the second liquid outlet pipe communicate with the liquid cavity respectively.

[0014] Optionally, the second liquid inlet pipe and the second liquid outlet pipe communicate with the bottom of the liquid cavity respectively.

[0015] Optionally, the gap between the second liquid inlet pipe and the second liquid outlet pipe and the bottom of the liquid cavity is 0.2-0.3mm; one end of the second liquid inlet pipe and the second liquid outlet pipe close to the bottom of the liquid cavity is a flat mouth.

[0016] Optionally, the liquid cavity is narrow at the bottom and wide at the top; the lower side of the liquid cavity is a cylindrical chamber, and the upper side is an inverted conical frustum chamber, and the lower bottom surface of the conical frustum chamber is the same as the top surface of the cylindrical chamber; the liquid tank has chambers accommodating the second liquid inlet pipe and the second liquid outlet pipe respectively; the liquid tank cover has an air vent; the air vent communicates with the liquid cavity.

[0017] Optionally, the bottom of the liquid tank is provided with a groove for mounting a sealing ring made of fluorine rubber.

[0018] Optionally, the first liquid inlet pipe and the first liquid outlet pipe are made of polytetrafluoroethylene or polyether ether ketone.

[0019] (III) Beneficial effects

[0020] The beneficial effects of the utility model are: the liquid pool structure design makes the maintenance of the liquid inlet pipe and the liquid outlet pipe more convenient. The outer side wall of the liquid tank is provided with two internal thread grooves, the liquid inlet connector and the liquid outlet connector are respectively threadedly connected with the two grooves, so that the liquid inlet pipe and the liquid outlet pipe can be easily disassembled, and the maintenance and replacement are convenient. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the liquid pool for the attenuated total reflection accessory of the infrared spectrometer in embodiment 1 along the direction of the first liquid inlet pipe and the first liquid outlet pipe.

[0022] Figure 2 It is a top view of the liquid pool for the attenuated total reflection accessory of the infrared spectrometer in embodiment 1.

[0023] Figure 3 It is a rear view of an electrically driven liquid flow controller.

[0024] Figure 4 It is a three-dimensional view of the liquid pool for the attenuated total reflection accessory of the infrared spectrometer in embodiment 2.

[0025] EXPLANATION OF REFERENCE NUMERALS

[0026] 1: liquid tank; 11: liquid cavity; 2: liquid tank cover; 21: spherical positioning point; 22: liquid tank cover handle; 23: air vent; 3: liquid inlet connector; 31: first liquid inlet pipe; 32: second liquid inlet pipe; 33: first conical compression ring; 4: liquid outlet connector; 41: first liquid outlet pipe; 42: second liquid outlet pipe; 43: second conical compression ring; 5: sealing ring. DETAILED DESCRIPTION

[0027] In order to better explain the utility model, so as to facilitate understanding, the following will be combined with the drawings, and the utility model will be described in detail through specific embodiments. Among them, the orientation of "up", "down" and other orientation terms mentioned in this paper is referred to as the orientation of the drawings. Figure 1

[0028] ​For better understanding of the above technical solutions, the exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer, more thorough understanding of the present application and to convey the complete scope of the present application to those skilled in the art.

[0029] Embodiment 1:

[0030] Referring to Figure 1 and Figure 2 The present embodiment provides a liquid cell for an infrared spectrometer attenuated total reflection accessory. First, introduce the infrared spectrometer, which is an instrument for analyzing the molecular vibration and rotation energy levels of a substance, and identifying and analyzing the substance based on the absorption characteristics of the molecule to specific wavelengths of infrared light. The infrared spectrometer is widely used in the fields of chemistry, physics, biology, material science, etc., for studying molecular structure, chemical composition, and physical properties. Attenuated total reflection of the infrared spectrometer is an important sampling technique that allows direct analysis of the sample without complex sample preparation. The attenuated total reflection accessory is one of the most commonly used accessories for infrared detection, which has the characteristics of simple sample measurement and easy use, and almost no sample pretreatment is required during the test. The infrared spectrometer can detect various types of samples, including solid samples and liquid samples.

[0031] The present application is a liquid cell for an infrared spectrometer for quantitative or qualitative detection of liquid samples, which comprises a liquid tank 1, a liquid inlet connector 3, a liquid outlet connector 4, a first liquid inlet pipe 31 and a first liquid outlet pipe 41. The outer side wall of the liquid tank 1 is provided with a first inner threaded groove and a second inner threaded groove communicating with the internal cavity of the liquid tank 1. The groove bottom is provided to avoid the threaded groove being too deep, and a certain thickness is reserved for the installation of the first conical compression ring 33, which does not affect the structure of the liquid tank 1. At the same time, the liquid cavity 11 is not directly communicated with the liquid cavity 11 in order to make the liquid sample enter the liquid cavity 11 from the bottom of the liquid tank 1, and the gas bubbles are discharged upward in the liquid inlet, and the liquid is sucked from the bottom in the liquid outlet to make the liquid outlet more complete, avoiding the influence of the remaining liquid sample on the next experiment. The first inner threaded groove and the second inner threaded groove are used to connect the liquid inlet connector 3 and the liquid outlet connector 4 together by threaded connection.

[0032] The first through hole is formed in the liquid inlet connector 3, and the second through hole is formed in the liquid outlet connector 4. The first through hole and the second through hole are provided for the liquid inlet pipe and the liquid outlet pipe to pass through the liquid inlet connector 3 and the liquid outlet connector 4. The outer wall of the liquid inlet connector 3 and the liquid outlet connector 4 is provided with external threads around the through hole. The external threads are provided to form a threaded connection with the first internal thread groove and the second internal thread groove. The first liquid inlet pipe 31 is installed in the first through hole, and the first liquid outlet pipe 41 is installed in the second through hole. The liquid inlet connector 3 is threadedly connected with the first internal thread groove, and the first liquid inlet pipe 31 is in communication with the internal cavity of the liquid tank 1. The liquid outlet connector 4 is threadedly connected with the second internal thread groove, and the first liquid outlet pipe 41 is in communication with the internal cavity of the liquid tank 1. When the liquid inlet pipe and the liquid outlet pipe need to be replaced or maintained, the external threads of the liquid inlet connector 3 and the liquid outlet connector 4 can be unscrewed from the threaded connection with the first internal thread groove and the second internal thread groove, and the liquid inlet pipe and the liquid outlet pipe installed in the first through hole and the second through hole can be removed at the same time, so as to replace new liquid inlet pipes and liquid outlet pipes.

[0033] It should be noted that the liquid inlet pipe and the liquid outlet pipe are only different in name, and there is no distinction in function and structure, that is, the liquid inlet pipe can both inlet and outlet liquid, and the liquid outlet pipe can both outlet and inlet liquid. The same applies to the liquid inlet connector and the liquid outlet connector. This design is symmetrical and does not distinguish between directions, and can more quickly meet the requirements of inlet and outlet.

[0034] Further, the liquid inlet connector 3 and the liquid outlet connector 4 further comprise a first conical compression ring 33 and a second conical compression ring 43. The end of the first through hole near the liquid tank 1 forms a first conical hole matched with the shape of the first conical compression ring 33, and the end of the second through hole near the liquid tank 1 forms a second conical hole matched with the shape of the second conical compression ring 43. The first conical compression ring 33 is placed in the first conical hole and is sleeved on the first liquid inlet pipe 31, and the second conical compression ring 43 is placed in the second conical hole and is sleeved on the first liquid outlet pipe 41. When the liquid inlet connector 3 and the liquid outlet connector 4 are threadedly connected with the first internal thread groove and the second internal thread groove, respectively, the first conical hole and the first conical compression ring 33 are tightly matched together, and at the same time, an internal force is generated to make the first conical compression ring 33 clamp the liquid inlet pipe. The second conical hole and the second conical compression ring 43 are tightly matched together, and at the same time, an internal force is generated to make the second conical compression ring 43 clamp the liquid outlet pipe, without affecting the inlet and outlet of liquid, and ensuring the stability of the liquid inlet pipe and the liquid outlet pipe.

[0035] The liquid inlet connector 3 is threadedly connected with the first internal thread groove, and the first conical compression ring 33 abuts against the bottom of the first internal thread groove. The liquid outlet connector 4 is threadedly connected with the second internal thread groove, and the second conical compression ring 43 abuts against the bottom of the second internal thread groove. The compression ring abutting against the bottom of the groove is to play a sealing role, so as to avoid leakage and volatilization of volatile liquid samples such as organic solvents from the bottom of the groove.

[0036] Further, referring to Figure 2The liquid pool further comprises a liquid tank cover 2 covering the top opening of the liquid tank 1, and the liquid tank 1 can be checked and cleaned by removing the liquid tank cover 2 when it is necessary to check or clean the liquid tank 1. The upper surface of the liquid tank cover 2 is provided with a spherical positioning point 21 recessed into the liquid tank 1 and used for cooperating with the pressure head. By adjusting the position of the pressure head, the pressure head is positioned by aligning with the spherical positioning point 21, so that the measurement probe of the infrared spectrometer corresponds to the measurement liquid sample, which is beneficial to obtain reliable spectral data.

[0037] Further, referring to Figure 2 The upper surface of the liquid tank cover 2 is further provided with an exhaust hole 23 communicating with the liquid cavity 11, so that the pressure inside and outside the liquid tank 1 is balanced during the liquid inlet and outlet process, and the efficiency of the liquid inlet and outlet is improved.

[0038] Specifically, referring to Figure 2 Both ends of the liquid tank cover 2 are provided with tank cover handles 22 protruding out of the liquid tank 1, which provide an easy-to-grasp part for the liquid tank cover 2, so that the experimenter can open or close the liquid tank cover 2. In addition, at least one of the upper and lower ends of the liquid tank cover handle 22 is provided with a plurality of anti-skid strips arranged in parallel and spaced apart, which can be made of rubber or integrally formed with the handle, so as to increase the friction between the hand and the handle, and make the handle more stable when grasped, avoiding the liquid tank cover 2 from falling and damaging the experimental instrument due to hand slipping.

[0039] Further, referring to Figure 1 The cavity wall of the liquid tank 1 is provided with a second liquid inlet pipe 32 and a second liquid outlet pipe 42 communicating with the liquid inlet connector 3 and the liquid outlet connector 4, wherein the first liquid inlet pipe 31 and the first liquid outlet pipe 41 respectively communicate with the second liquid inlet pipe 32 and the second liquid outlet pipe 42. It should be noted that the second liquid inlet pipe 32 and the second liquid outlet pipe 42 have the same structure and no fixed flow direction, and both can be used for liquid inlet or liquid outlet.

[0040] Further, referring to Figure 1 The second liquid inlet pipe 32 and the second liquid outlet pipe 42 communicate with the bottom of the liquid cavity 11, so that the liquid sample enters the liquid cavity 11 from the bottom of the liquid tank 1 in the liquid inlet pipe, and the bubbles are discharged upward in the liquid inlet process. In the liquid outlet process, the liquid is sucked from the bottom to make the liquid outlet more thorough, avoiding the influence of the remaining liquid sample on the next experiment and the corrosion to the liquid tank. Preferably, the gap between the second liquid inlet pipe 32 and the second liquid outlet pipe 42 and the bottom of the liquid cavity 11 is 0.2mm-0.3mm, which ensures the flowability during the liquid inlet and outlet process, avoids the liquid flow being hindered due to too small gap, and also avoids the liquid outlet not being thorough due to too large gap.

[0041] Further, referring to Figure 1, the second liquid inlet pipe 32 and the second liquid outlet pipe 42 are designed as a flat mouth near the bottom of the liquid cavity 11, the flat mouth design makes the air of the liquid inlet pipe and the liquid outlet pipe air inlet and air outlet to wrap the water molecules, and the liquid outlet is more complete, the flat mouth is designed to appropriately reduce the gap (Bernoulli principle) and accelerate the air flow, so that the surrounding air also wraps the water droplets into the liquid outlet pipe, so that the liquid outlet is more complete.

[0042] Further, referring to Figure 1 , the liquid cavity 11 is a structure of narrow bottom and wide top, the upside is an inverted circular conical table chamber, the liquid flows downward more easily, and the downside is a cylindrical chamber, the lower bottom surface of the circular table chamber is the same as the top surface of the cylindrical chamber, the liquid bin 1 is provided with chambers for accommodating the second liquid inlet pipe 32 and the second liquid outlet pipe 42, and the liquid cavity 11 is a region for containing the experimental liquid sample.

[0043] Further, referring to Figure 1 , the bottom of the liquid bin 1 is provided with a groove for mounting a sealing ring made of fluorine rubber, the sealing ring 5 prevents liquid leakage and can effectively prevent liquid leakage and volatilization, thereby ensuring test accuracy and improving environmental protection. In particular, the sealing ring is an "O" type sealing ring.

[0044] Further, referring to Figure 2 , the base of the liquid bin 1 is a round bottom type, which is usually easier to shape during manufacturing, which can reduce manufacturing cost and time.

[0045] The first liquid inlet pipe 31 and the second liquid inlet pipe 41 are made of polytetrafluoroethylene or polyether ether ketone, the second liquid inlet pipe 32 and the second liquid outlet pipe 42 are made of stainless steel (or with a hole in the liquid bin), and the liquid inlet connector 3 and the liquid outlet connector 4 are made of polyether ether ketone.

[0046] Combined with Figure 1 and Figure 3 is a rear view schematic diagram of a sample inlet and outlet controller, the use steps of the embodiment are as follows:

[0047] S1: The liquid suction inlet of the sample inlet and outlet controller is connected to an experimental vessel containing the measured liquid through a conduit, the liquid suction outlet is connected to the first liquid inlet pipe 31, the liquid outlet inlet is connected to the first liquid outlet pipe 41, and the liquid outlet outlet is connected to a waste liquid vessel through a conduit;

[0048] S2: Set the volume of the liquid sample required for the experiment by driving the liquid flow controller, start the electrically driven liquid flow controller, and then the measured liquid enters the liquid cavity 11 through the liquid inlet pipe after passing through the electrically driven liquid flow controller, the gas in the liquid cavity 11 is discharged from the exhaust hole 23, until the electrically driven liquid flow controller stops running, and the infrared spectrometer performs attenuated total reflection spectrum experiment on the measured liquid;

[0049] S3: After the experiment, the measured liquid is sucked out from the liquid cavity 11 through the electrically driven liquid flow controller and discharged into a waste liquid container after passing through the electrically driven liquid flow controller;

[0050] S4: Cleaning, without opening the liquid pool, the liquid pool can also be quickly cleaned through the electrically driven liquid flow controller, so that the cleaning is faster and more convenient.

[0051] Embodiment 2:

[0052] With reference to Figure 2 and Figure 4 On the basis of embodiment 1, the structure and function of the liquid pool for the infrared spectrometer attenuated total reflection accessory in embodiment 1 are kept unchanged, and the base of the liquid bin 1 is further described in this embodiment.

[0053] The base of the liquid bin 1 can also be in a cross form, and there is no distinction in function between the two, and the base can also be designed in other forms. This makes the liquid bin 1 more flexible and variable, and can better adapt to different infrared spectrometers.

[0054] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0055] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature is "above", "above" and "above" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0057] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0058] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A liquid cell for an attenuating total internal reflection accessory for an infrared spectrometer, characterized in that, It includes a liquid tank (1), a liquid inlet connector (3), a liquid outlet connector (4), a first liquid inlet pipe (31), and a first liquid outlet pipe (41). The outer wall of the liquid tank (1) is provided with a first internal thread groove and a second internal thread groove to connect the internal cavity of the liquid tank. The liquid inlet connector is provided with a first through hole, and the liquid outlet connector is provided with a second through hole. The outer walls of the liquid inlet connector (3) and the liquid outlet connector (4) are provided with external threads around the through holes. The first liquid inlet pipe (31) is installed in the first through hole, and the first liquid outlet pipe (41) is installed in the second through hole. The liquid inlet connector (3) is threadedly connected to the first internal thread groove, the first liquid inlet pipe (31) is connected to the internal cavity of the liquid tank (1), the liquid outlet connector (4) is threadedly connected to the second internal thread groove, and the first liquid outlet pipe (41) is connected to the internal cavity of the liquid tank (1).

2. The liquid pool for attenuating total internal reflection accessories of an infrared spectrometer as described in claim 1, characterized in that: It also includes a first conical pressure ring (33) and a second conical pressure ring (43); The first through hole near the end of the liquid tank (1) forms a first conical hole that matches the shape of the first conical pressure ring (33), and the second through hole near the end of the liquid tank (1) forms a second conical hole that matches the shape of the second conical pressure ring (43). The first conical pressure ring (33) is placed inside the first conical hole and is sleeved on the first liquid inlet pipe (31). The second conical pressure ring (43) is placed inside the second conical hole and is sleeved on the first liquid outlet pipe (41). The liquid inlet connector (3) is threadedly connected to the first internal thread groove. The first conical pressure ring (33) abuts against the bottom of the first internal thread groove. The liquid outlet connector (4) is threadedly connected to the second internal thread groove. The second conical pressure ring (43) abuts against the bottom of the second internal thread groove.

3. The liquid cell for attenuating total internal reflection accessories of an infrared spectrometer as described in claim 1, characterized in that: It also includes a liquid tank cover (2) that covers the top opening of the liquid tank (1); The upper surface of the liquid tank cover (2) is provided with a spherical positioning point (21) that is recessed into the liquid tank (1) for cooperating with the pressure head.

4. The liquid pool for an infrared spectrometer attenuation total internal reflection accessory as described in claim 3, characterized in that: The liquid tank cover (2) is provided with cover handles (22) extending out of the liquid tank (1) at both ends.

5. The liquid pool for attenuating total internal reflection accessories of an infrared spectrometer as described in claim 3, characterized in that: The cavity wall of the liquid chamber (1) forms a liquid cavity (11). The liquid chamber (1) has a second inlet pipe (32) and a second outlet pipe (42) that are respectively connected to the inlet connector (3) and the outlet connector (4). The second inlet pipe (32) and the second outlet pipe (42) are respectively connected to the liquid chamber (11).

6. The liquid pool for an infrared spectrometer attenuation total internal reflection accessory as described in claim 5, characterized in that: The second inlet pipe (32) and the second outlet pipe (42) are respectively connected to the bottom of the liquid chamber (11).

7. The liquid pool for an infrared spectrometer attenuation total internal reflection accessory as described in claim 5, characterized in that: The gap between the second inlet pipe (32) and the second outlet pipe (42) and the bottom of the liquid chamber (11) is 0.2mm-0.3mm; The second inlet pipe (32) and the second outlet pipe (42) have a flat end near the bottom of the liquid chamber (11).

8. The liquid cell for attenuating total internal reflection accessories of an infrared spectrometer as described in claim 5, characterized in that: The liquid cavity (11) is narrow at the bottom and wide at the top; The liquid cavity (11) has a cylindrical cavity on the lower side and an inverted frustum-shaped cavity on the upper side, and the lower bottom surface of the frustum-shaped cavity is the same as the top surface of the cylindrical cavity. The liquid tank (1) is provided with chambers for accommodating the second inlet pipe (32) and the second outlet pipe (42); The liquid tank cover (2) is provided with an exhaust hole (23); The vent (23) is connected to the liquid chamber (11).

9. The liquid pool for an infrared spectrometer attenuation total internal reflection accessory as described in claim 1, characterized in that: The bottom of the liquid tank (1) is provided with a groove for installing a sealing ring (5) made of fluororubber.

10. The liquid cell for attenuating total internal reflection accessories of an infrared spectrometer as described in claim 1, characterized in that: The first inlet pipe (31) and the first outlet pipe (41) are made of polytetrafluoroethylene or polyetheretherketone.

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