Solid sample tablet press for infrared spectrum experiment

Abstract

The utility model relates to the field of infrared spectrum experiments, in particular to a solid sample tablet press for an infrared spectrum experiment. Comprising a sample preparation platform used for preparing an experimental sample, a smoothing mechanism used for being matched with the sample preparation platform to improve the property stability of the sample, a manual sample preparation component used for assisting the smoothing mechanism to perform pressure forming, and a hydraulic unit, wherein the manual sample preparation component is mounted on a preparation platform mechanism; a machine base is arranged at the bottom of the preparation table mechanism, the smoothing mechanism is installed at the movable end of the bottom of the sample preparation manual component, the sample preparation platform is arranged at the corresponding position of the lower side of the smoothing mechanism, and the top of a lifting part of the sample preparation manual component is connected with a hydraulic unit. The twisting assembly is matched with the manual sample preparation component, so that the sample pressing head rotates and presses down in the pressing process, powdery sample raw materials are twisted and pressed down in a balanced mode in the pressing process, powder of all parts is more uniform when a sample is formed, and the accuracy of later detection is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of infrared spectroscopy experiments, in particular to a solid sample tablet press for infrared spectroscopy experiments. Background Technique

[0002] Infrared spectroscopy experiment is an analytical method for identifying molecular structures and chemical components by analyzing the absorption characteristics of substances to infrared light. During the experiment, it should be noted that: the sample preparation needs to ensure uniform thickness, avoid moisture absorption, and use high-purity dry reagents; before operating the instrument, the baseline needs to be calibrated and the environmental temperature and humidity need to be kept stable, and the background spectrum needs to be collected synchronously during testing to eliminate interference; special samples need to be pretreated, for strongly absorbing substances, the ATR mode or appropriate dilution is required, and at the same time, attention should be paid to avoiding the interference of carbon dioxide and water vapor on the spectrum.

[0003] In the prior art, the Chinese utility model with the comparative publication number CN214277587U discloses a manual tablet press for infrared spectroscopy experiments. It ensures the relative movement accuracy of the upper and lower punch heads by providing a guiding positioning groove on the upper punch head. At the same time, the cooperation of the operating rod, the convex block and the reset elastic member is adopted to realize automatic reset and convenient operation. However, it is found in actual operation that since there will be gaps when the equipment slips, these gaps will cause end face offset after multiple fits are stacked, thus affecting the flatness of the finished product surface. And during the process of processing powder into a finished product, if the uniform spreading of the powder cannot be ensured, it will also affect the concentration of each part of the sample itself, thus affecting the later detection effect. Content of the Utility Model

[0004] The purpose of the utility model is to provide a solid sample tablet press for infrared spectroscopy experiments to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] A solid sample tablet press for infrared spectroscopy experiments includes a sample preparation platform for preparing experimental samples, a smoothing mechanism for cooperating with the sample preparation platform to improve the stability of sample properties, a sample preparation manual component and a hydraulic unit for assisting the smoothing mechanism to perform pressure forming. The sample preparation manual component is installed on the preparation table mechanism, the bottom of the preparation table mechanism is provided with a machine base, the smoothing mechanism is installed at the movable end of the bottom of the sample preparation manual component, the sample preparation platform is arranged at the corresponding position below the smoothing mechanism, and the top of the lifting part of the sample preparation manual component is connected with a hydraulic unit;

[0007] The flattening mechanism includes a sample pressing head, a rotating rod is connected to the top of the sample pressing head, a fitting seat is arranged on the outer side of the top of the rotating rod, a through hole for fitting the rotation and sliding of the rotating rod is formed on the fitting seat, the rotating rod is fitted with the fitting seat through a torsion assembly, an auxiliary sliding rod is fixedly connected to the top of the rotating rod, a support spring is arranged between the top of the rotating rod and the fitting seat, and the fitting seat is installed on the downward pressing movable end of the sample preparation manual component.

[0008] Preferably: The torsion assembly includes guiding keys, several guiding keys are arranged in a circumferential array on the outer circumference of the rotating rod near the top, a spiral positioning groove for fitting the rotation and sliding of the guiding keys is formed on the inner wall of the through hole of the fitting seat, and the spiral positioning groove is of a spiral structure.

[0009] With such a setting, during the sample preparation process, by using the cooperation of the guiding keys and the spiral positioning groove, when the sample pressing head presses down, the sample powder is rotated and flattened, so that the sample is more evenly distributed during the downward pressing and forming process, and the densities of all regions of the finished product are the same, ensuring the accuracy during subsequent detection.

[0010] Preferably: The number of the guiding keys is N, and 5 ≤ N ≤ 9.

[0011] Preferably: The movable downward pressing end of the sample preparation manual component is a second sliding table, the second sliding table is slidably connected to the inside of the first sliding table of the preparation table mechanism, a connecting rocker arm is connected to the top of the second sliding table through a pin shaft, a pressing rocker arm is connected to the top of the connecting rocker arm through a pin shaft, a handle is arranged on the top of the pressing rocker arm, a baffle for restricting the up and down sliding of the second sliding table is arranged on the front end face of the first sliding table, and the rear part of the connecting rocker arm is fitted with the fixed table of the preparation table mechanism through a locking component.

[0012] Preferably: The locking component includes a locking rod, the locking rod passes through and is slidably connected to the inside of the first sliding table in the front and rear directions, a limiting ring is arranged at the central position of the locking rod, a return spring is arranged between the rear end of the limiting ring and the first sliding table, and a friction pattern is formed on the rear end face of the locking rod.

[0013] Preferably: The sample preparation platform includes a base, the base is fixedly connected to the upper end face of the machine base, a slide rail is arranged on the top of the base, a sample mold is slidably connected to the slide rail, a limiting strip for restricting the sliding of the sample mold is arranged on one side of the upper end of the slide rail, and a material taking top block is arranged on the other side of the upper end of the slide rail.

[0014] Preferably: The material of the sample pressing head is stainless steel, and the bottom surface of the sample pressing head is a smooth surface.

[0015] Compared with the prior art, the beneficial effects are as follows:

[0016] The manual component for sample preparation is combined with a torsion component, so that the sample press head rotates and presses downward during the downward pressing process, so that the powdery sample raw material is evenly torsionally pressed downward during the downward pressing process, so that the powder of each part is more uniform when the sample is formed, and the forming effect is more stable, thus ensuring the accuracy during the later detection. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of a solid sample press for infrared spectroscopy experiments according to the present invention;

[0019] Figure 2 It is a schematic structural diagram of the sample preparation platform of a solid sample press for infrared spectroscopy experiments according to the present invention;

[0020] Figure 3 It is a schematic structural diagram of the manual component for preparation of a solid sample press for infrared spectroscopy experiments according to the present invention;

[0021] Figure 4 It is a schematic internal structural diagram of the manual component for preparation of a solid sample press for infrared spectroscopy experiments according to the present invention;

[0022] Figure 5 It is a schematic structural diagram of the flattening mechanism of a solid sample press for infrared spectroscopy experiments according to the present invention;

[0023] Figure 6 It is a schematic diagram of the first state of the flattening mechanism of a solid sample press for infrared spectroscopy experiments according to the present invention;

[0024] Figure 7 It is a schematic diagram of the second state of the flattening mechanism of a solid sample press for infrared spectroscopy experiments according to the present invention;

[0025] Figure 8 It is a sectional view of the sample mold of a solid sample press for infrared spectroscopy experiments according to the present invention.

[0026] The description of the reference numerals in the drawings is as follows:

[0027] 1. Machine base; 2. Sample preparation platform; 3. Preparation table mechanism; 4. Preparation manual component; 5. Hydraulic unit; 6. Smoothing mechanism; 21. Base; 22. Slide rail; 23. Sample mold; 24. Limit strip; 25. Material taking top block; 31. First sliding table; 32. Fixed table; 41. Handle; 42. Pressing rocker arm; 43. Connecting rocker arm; 44. Second sliding table; 45. Locking rod; 46. Limit ring; 47. Return spring; 61. Sample pressing head; 62. Rotating rod; 63. Matching seat; 64. Guide key; 65. Spiral positioning groove; 66. Auxiliary sliding rod. Detailed implementation mode

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] The present utility model will be further described below with reference to the accompanying drawings:

[0030] As Figures 1-8 shown, a solid sample press for infrared spectroscopy experiments includes a sample preparation platform 2 for preparing samples for experiments, a smoothing mechanism 6 for cooperating with the sample preparation platform 2 to improve the stability of sample properties, a sample preparation manual component 4 for assisting the smoothing mechanism 6 to perform pressure forming, and a hydraulic unit 5. The sample preparation manual component 4 is installed on the preparation table mechanism 3. A machine base 1 is provided at the bottom of the preparation table mechanism 3. The smoothing mechanism 6 is installed at the movable end of the bottom of the sample preparation manual component 4. The sample preparation platform 2 is arranged at the corresponding position below the smoothing mechanism 6. The top of the lifting part of the sample preparation manual component 4 is connected with the hydraulic unit 5;

[0031] The smoothing mechanism 6 includes a sample pressing head 61. The top of the sample pressing head 61 is connected with a rotating rod 62. A matching seat 63 is arranged on the outer side of the top of the rotating rod 62. A through hole for rotating and sliding in cooperation with the rotating rod 62 is formed on the matching seat 63. The rotating rod 62 is cooperated with the matching seat 63 through a torsion assembly. An auxiliary sliding rod 66 is fixedly connected to the top of the rotating rod 62. A support spring is arranged between the top of the rotating rod 62 and the matching seat 63. The matching seat 63 is installed at the pressing movable end of the sample preparation manual component 4.

[0032] Preferably, the torsion assembly includes a guiding key 64. A plurality of guiding keys 64 are arranged in a circumferential array at a position near the top of the outer circle of the rotating rod 62. A spiral positioning groove 65 for rotating and sliding in cooperation with the guiding key 64 is formed on the inner wall of the through hole of the mating seat 63, and the spiral positioning groove 65 is of a spiral structure.

[0033] With such a setting, during the sample preparation process, by utilizing the cooperation between the guiding key 64 and the spiral positioning groove 65, when the sample indenter 61 is pressed downward, the sample powder is rotated and leveled, so that the sample is more evenly distributed during the process of being pressed and formed, and the densities of all regions of the finished product are the same, ensuring the accuracy during subsequent detection.

[0034] Preferably, the number of guiding keys 64 is N, and 5 ≤ N ≤ 9.

[0035] With such a setting, during the sample preparation process, during the extrusion process of the cooperation between multiple guiding keys 64 and the spiral positioning groove 65, the pressure will be evenly distributed between the multiple guiding keys 64 and the spiral positioning groove 65, and by utilizing the uniform distribution effect of the pressure, the pressure at the tangent points of the guiding key 64 and the spiral positioning groove 65 is dispersed, so that the multiple points are automatically leveled during the downward pressing process, thereby ensuring that the surface of the sample is flatter during the preparation process, and thus ensuring the accuracy of the subsequent detection of the sample.

[0036] Preferably, the movable downward pressing end of the manual component 4 for sample preparation is a second sliding table 44. The second sliding table 44 is slidably connected to the inside of the first sliding table 31 of the preparation table mechanism 3. The top of the second sliding table 44 is connected to a connecting swing arm 43 through a pin shaft, the top of the connecting swing arm 43 is connected to a pressing swing arm 42 through a pin shaft, a handle 41 is arranged at the top of the pressing swing arm 42, a baffle for restricting the up and down sliding of the second sliding table 44 is arranged on the front end face of the first sliding table 31, and the rear part of the connecting swing arm 43 is matched with the fixed table 32 of the preparation table mechanism 3 through a locking component.

[0037] With such a setting, during the sample preparation process, it is necessary to first manually prepare the powder into a block, and then use the pressing member to form the block structure into a block. At this time, by using the locking component to cooperate with the manual part, the positioning of the manual operation can be ensured, thereby improving the forming effect of the initial sample powder and the overall uniformity of the sample.

[0038] Preferably, the locking component includes a locking rod 45. The locking rod 45 penetrates through and is slidably connected to the inside of the first sliding table 31 in the front and rear directions. A limiting ring 46 is arranged at the central position of the locking rod 45. A return spring 47 is arranged between the rear end of the limiting ring 46 and the first sliding table 31. A friction pattern is formed on the rear end face of the locking rod 45.

[0039] Preferably, the sample preparation platform 2 includes a base 21 fixedly connected to the upper end surface of the machine base 1. A slide rail 22 is provided on the top of the base 21. A sample mold 23 is slidably connected to the slide rail 22. A limiting strip 24 for restricting the sliding of the sample mold 23 is provided on one side of the upper end of the slide rail 22. A material taking top block 25 is provided on the other side of the upper end of the slide rail 22.

[0040] With such a setting, after the sample preparation process, the sample block is stuck in the sample mold 23 due to pressure. At this time, the material taking top block 25 is used to quickly take out the sample, and at the same time, it is avoided that the sample is knocked and collided, which affects the subsequent detection.

[0041] Preferably, the material of the sample pressing head 61 is stainless steel, and the bottom surface of the sample pressing head 61 is a smooth surface.

[0042] With such a setting, the smooth bottom surface of the sample pressing head 61 can ensure the smoothness of the sample surface and improve the later detection effect.

[0043] Working principle: During sample preparation, first move the sample mold 23 to the side of pouring the material, pour the sample powder into the groove of the sample mold 23, and gently tap the side of the sample mold 23 and the material taking top block 25 first to make the powder initially spread evenly, improving the sample forming effect;

[0044] Then move the sample mold 23 to the side of the sample pressing head 61. At this time, pull the handle 41, and use the pressure application swing arm 42 and the connecting swing arm 43 to drive the second sliding table 44 to drive the flattening mechanism 6 to press down as a whole. During the pressing down process, the bottom surface of the sample pressing head 61 first contacts the powder, and the powder is gradually compacted. During the compaction process, the powder will provide a reverse resistance to the sample pressing head 61. At this time, the resistance is transmitted through the rotating rod 62, prompting the rotating rod 62 to contract towards the inside of the mating seat 63. During the contraction process, the mating seat 63 and the guiding key 64 cooperate to twist the rotating rod 62. When the rotating rod 62 twists, it will drive the powder at the bottom to rotate, so that the concave and convex parts of the powder are rotated and filled with each other, thereby improving the sample preparation effect;

[0045] In the later stage of pressing down, the connecting swing arm 43 abuts against the locking rod 45, and the locking rod 45 moves backward and abuts against the fixed table 32 for locking. At this time, locking is provided for the first sliding table 31. Continuously pull the handle 41 to ensure the forming effect of the sample;

[0046] After manual preliminary forming, rotate the handle 41 upward by 30°, so that the handle 41 is disengaged from the locking rod 45. At this time, start the hydraulic unit 5 to deeply press the sample, so as to finally form the sample. After forming, lift the hydraulic unit 5 and the handle 41, horizontally move the sample mold 23, and use the material taking top block 25 to take out the finished product.

[0047] The above has shown and described the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A solid sample tablet press for infrared spectroscopy experiments, characterized in that: The invention comprises a sample preparation platform (2) for preparing experimental samples, a smoothing mechanism (6) for cooperating with the sample preparation platform (2) to improve the stability of sample properties, and a sample preparation manual component (4) and a hydraulic unit (5) for assisting the smoothing mechanism (6) in performing pressurized molding, wherein the sample preparation manual component (4) is mounted on a preparation platform mechanism (3), a base (1) is arranged at the bottom of the preparation platform mechanism (3), the smoothing mechanism (6) is mounted at the movable end at the bottom of the sample preparation manual component (4), the sample preparation platform (2) is arranged at a corresponding position below the smoothing mechanism (6), and the top of the lifting part of the sample preparation manual component (4) is connected to the hydraulic unit (5); The smoothing mechanism (6) comprises a sample pressing head (61), the top of the sample pressing head (61) is connected to a rotating rod (62), a matching seat (63) is arranged on the outer side of the top of the rotating rod (62), a through hole is formed on the matching seat (63) for matching the rotating rod (62) to rotate and slide, the rotating rod (62) matches the matching seat (63) through a torsion assembly, the top of the rotating rod (62) is fixedly connected to an auxiliary sliding rod (66), a supporting spring is arranged between the top of the rotating rod (62) and the matching seat (63), and the matching seat (63) is installed at the pressing movable end of the sample preparation manual component (4).

2. The solid sample tablet press for infrared spectroscopy experiments according to claim 1, characterized in that: The torsion assembly comprises a guide key (64), a plurality of the guide keys (64) are arranged in a circular array on the outer circle of the rotating rod (62) near the top position, and a spiral positioning groove (65) is formed on the inner wall of the through hole of the matching seat (63) to cooperate with the guide key (64) for rotation and sliding, and the spiral positioning groove (65) is a spiral structure.

3. The solid sample tablet press for infrared spectroscopy experiments according to claim 2, characterized in that: The number of the guide keys (64) is N, and 5≤N≤9.

4. The solid sample tablet press for infrared spectroscopy experiments according to claim 3, characterized in that: The movable downward pressing end of the sample preparation manual component (4) is a second slide (44), the second slide (44) is slidably connected to the inner side of the first slide (31) of the preparation table mechanism (3), the top of the second slide (44) is connected to a connecting rocker arm (43) via a pin, the top of the connecting rocker arm (43) is connected to a pressurizing rocker arm (42) via a pin, the top of the pressurizing rocker arm (42) is provided with a handle (41), the front end surface of the first slide (31) is provided with a baffle plate for limiting the second slide (44) from sliding up and down, and the rear of the connecting rocker arm (43) cooperates with the fixed table (32) of the preparation table mechanism (3) via a locking assembly.

5. The solid sample tablet press for infrared spectroscopy experiments according to claim 4, characterized in that: The locking assembly comprises a locking rod (45), the locking rod (45) passing through the first slide table (31) from front to back and being slidably connected thereto, a limiting ring (46) being arranged at the center of the locking rod (45), a return spring (47) being arranged between the rear end of the limiting ring (46) and the first slide table (31), and a friction pattern being formed on the rear end surface of the locking rod (45).

6. The solid sample tablet press for infrared spectroscopy experiments according to claim 5, characterized in that: The sample preparation platform (2) comprises a base (21), the base (21) being fixedly connected to the upper end surface of the machine base (1), a slide rail (22) being arranged on the top of the base (21), a sample mold (23) being slidably connected to the slide rail (22), a limit bar (24) for limiting the sliding of the sample mold (23) being arranged on one side of the upper end of the slide rail (22), and a material removal top block (25) being arranged on the other side of the upper end of the slide rail (22).

7. The solid sample tablet press for infrared spectroscopy experiments according to claim 2, characterized in that: The sample pressing head (61) is made of stainless steel, and the bottom surface of the sample pressing head (61) is a smooth surface.

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