High-precision quantitative conveying analysis pump for chromatographic instrument

Abstract

The utility model discloses a high-precision quantitative conveying analysis pump for a chromatographic instrument, and particularly relates to the technical field of chromatographic instrument analysis pumps, the high-precision quantitative conveying analysis pump mainly comprises an analysis pump, a liquid inlet pipe and a collecting ring, the liquid inlet pipe is fixed at the input end of the analysis pump, the collecting ring is fixedly arranged on the inner wall of the liquid inlet pipe, and a collecting and processing mechanism is arranged at the bottom end of the outer wall of the liquid inlet pipe; the collecting and processing mechanism comprises a limiting block, a collecting barrel, a sealing gasket, a pressing block, a connecting block, an electric cylinder, a filtering hole ring and a flow guide block. According to the utility model, a collection processing mechanism is adopted, an analysis pump is started, so that chromatographic instrument sample liquid enters a collection ring and is guided to a guide block through the collection ring, impurities enter a collection barrel along the interior of the collection ring, a connecting block drives a pressing block to move downwards, and the impurities in the collection barrel are discharged downwards; impurities collected on the filtering hole ring can be quickly cleaned, sample liquid can be stably and quantitatively provided for conveying analysis, and the analysis accuracy is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatograph analysis pumps, and more specifically, to a high-precision quantitative delivery analysis pump for a chromatograph. Background Art

[0002] High-precision quantitative delivery analytical pumps precisely control flow rates, ensuring stability during chromatographic separations. This is particularly important for experiments requiring precise measurement and separation of trace substances. Furthermore, they provide pressure maintenance. The analytical pump maintains a constant pressure within the system to ensure a stable and continuous flow of mobile phase through the chromatographic column, thereby improving separation efficiency and reproducibility.

[0003] In existing public literature, patent publication number CN214616901U discloses an infusion pump for use in liquid chromatography analysis systems. This pump not only has a simple structure, making it easier to disassemble and maintain, but also uses a threaded connection between a support limit nut and the infusion pump cavity to apply a preload to the ball screw bearing. This effectively offsets the maximum axial working load of the infusion pump, eliminates the axial clearance problem of the ball screw bearing caused by cumulative manufacturing errors, and ensures the flow rate accuracy and precision of the infusion pump. However, this pump patent has the following drawbacks:

[0004] When the analytical pump is used to transport the sample liquid required for analysis by the chromatograph, the sample liquid needs to be pressurized and transported. During the transportation process, some smaller impurities exist in the sample liquid. The impurities will be concentrated after filtering, causing filter blockage, making it difficult to provide stable and quantitative transportation analysis of the sample liquid, resulting in poor analysis accuracy. For this purpose, a high-precision quantitative transportation analysis pump for a chromatograph is provided. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a high-precision quantitative delivery analysis pump for a chromatograph.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a high-precision quantitative delivery analysis pump for a chromatograph, comprising an analysis pump, a liquid inlet pipe and a collecting ring, the liquid inlet pipe is fixed on the input end of the analysis pump, the collecting ring is fixedly installed on the inner wall of the liquid inlet pipe, and the bottom end of the outer wall of the liquid inlet pipe is provided with a collecting and processing mechanism; the collecting and processing mechanism comprises a limit block, a collecting tube, a sealing gasket, a pressure block, a connecting block, an electric cylinder, a filter hole ring and a guide block; the collecting tube is fixedly connected to the outer wall of the liquid inlet pipe, the limit block is located in front of the liquid inlet pipe and is fixedly connected on the outer wall of the collecting ring, and the sealing gasket is squeezed on the bottom end of the collecting tube; the pressure block is bonded to the bottom end of the sealing gasket, the connecting block is fixed on one side of the pressure block, and the electric cylinder is fixedly installed on the top of the connecting block, and the connecting block and the collecting tube are fixedly connected; the inner wall of the collecting ring is fixedly connected with the filter hole ring, and the inner wall of the filter hole ring is fixedly connected with the guide block.

[0007] Preferably, the collection ring is connected to the collection canister, and the inner walls of the collection ring and the collection canister are both smooth. The sealing gasket is made of rubber with a rectangular cross-section. The pressure block and connecting block are both made of stainless steel. The output end of the analytical pump is fixedly connected to a liquid outlet pipe, and one end of the liquid outlet pipe is mounted with a limit support mechanism.

[0008] In this technical solution, the analysis pump is started to allow the chromatograph sample liquid to enter the interior of the collection ring, and the guide block guides the liquid to the filter hole ring, and the filter hole ring is used for fitting filtration. The impurities enter the collection tube along the inside of the collection ring and are stored inside the collection tube. The electric cylinder is started to drive the connecting block to move downward, and the connecting block drives the pressure block to move downward. The sealing gasket is no longer squeezed at the bottom of the collection tube, and the impurities inside the collection tube are discharged downward to prevent the accumulation of impurities and the clogging of the filter hole ring. There is enough space to collect impurities. After being pressurized, the chromatograph sample liquid is transported to the liquid outlet pipe through the analysis pump, and then transported to the flow meter by the liquid outlet pipe. After transportation, it can be analyzed by the chromatograph to achieve high-precision analysis operation.

[0009] Preferably, the position limiting support mechanism includes a flow meter, a reinforcement frame, a support bar, a reinforcement block, a reinforcement protrusion, a reinforcement column, a tilting frame, and two mounting support plates; the flow meter is fixedly connected to one end of the liquid outlet pipe, the reinforcement frame is fixed to the outer wall of the flow meter, and the support bar is located at the top of the reinforcement frame and welded, and the reinforcement block is fixed between the support bar and the liquid outlet pipe;

[0010] The reinforcement bump is welded to the bottom of the reinforcement frame, and the reinforcement column is welded to one side of the reinforcement bump. The tilting frame is fixedly connected to the bottom of the reinforcement bump. Two mounting plates are fixed to the bottom of the analytical pump. The vertical cross-section of the reinforcement frame is concave, and both the reinforcement frame and the reinforcement bump are made of stainless steel. The mounting plates are fixedly connected to the tilting frame and are symmetrically arranged around the center of the analytical pump.

[0011] In this technical solution, two mounting plates are fixed to the platform by bolts to increase the stability of the analytical pump. The mounting plates support the tilt frame, and the analytical pump supports the reinforcement column. The reinforcement protrusions can achieve stable support operation on the bottom end of the reinforcement frame. The reinforcement frame provides stable support force for the outer wall of the flow meter, greatly improving the high stability of the flow meter.

[0012] The technical effects and advantages of this utility model are:

[0013] The utility model adopts a collection and processing mechanism, which starts the analysis pump to allow the chromatograph sample liquid to enter the collection ring, and is guided to the guide block through the collection ring. The filtered impurities can accumulate and move downward under the action of gravity, and the impurities enter the collection tube along the collection ring. The electric cylinder is started to drive the connecting block to move downward, and the connecting block drives the pressure block to move downward. The pressure block carries the sealing gasket downward to realize the downward discharge of the impurities in the collection tube. The impurities collected on the filter hole ring can be quickly cleaned, ensuring that the chromatograph sample liquid can pass through the filter hole ring to avoid blockage. The sample liquid can be stably and quantitatively provided for transportation analysis, and the analysis accuracy is greatly improved.

[0014] 2. The utility model adopts a limit support mechanism, two mounting support plates support the analysis pump, the tilt frame supports the reinforcement bump, and the analysis pump supports the reinforcement column, the reinforcement column supports the reinforcement bump, and the reinforcement frame provides stable support force for the outer wall of the flow meter, greatly improving the high stability of the flow meter. The flow meter can avoid shaking during the metering process, ensuring that the flow meter can stably achieve metering operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a high-precision quantitative delivery analysis pump for a chromatograph of the present utility model.

[0016] Figure 2 This is a schematic diagram of the vertical cross-section structure of a high-precision quantitative delivery analysis pump for a chromatograph of the present utility model.

[0017] Figure 3 It is a schematic diagram of the local structure of the connection between the collecting ring and the limiting block of the utility model.

[0018] Figure 4 It is a schematic diagram of the partial structure of the vertical section of the connection between the liquid inlet pipe and the collecting cylinder of the present utility model.

[0019] Figure 5 This is a schematic diagram of the partial structure of the connection between the liquid outlet pipe and the analysis pump of the present invention.

[0020] The accompanying drawings are marked as follows: 1. analytical pump; 2. liquid inlet pipe; 3. collecting ring; 4. limit block; 5. collecting cylinder; 6. sealing gasket; 7. pressure block; 8. connecting block; 9. electric cylinder; 10. filter hole ring; 11. guide block; 12. liquid outlet pipe; 13. flow meter; 14. reinforcement frame; 15. support bar; 16. reinforcement block; 17. reinforcement protrusion; 18. reinforcement column; 19. tilting frame; 20. installation support plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] As attached Figure 1-5 A high-precision quantitative delivery analysis pump for a chromatograph is shown. The high-precision quantitative delivery analysis pump for a chromatograph is provided with a collection and processing mechanism. The setting of the collection and processing mechanism can quickly clean up the impurities collected on the filter hole ring 10, ensuring that the chromatograph sample liquid can pass through the filter hole ring 10 to avoid blockage. The sample liquid can be stably and quantitatively provided for delivery analysis, and the analysis accuracy is greatly improved. The specific structural setting of the collection and processing mechanism is as follows.

[0023] In this technical solution, as shown in the attached Figure 1-4 As shown, the liquid inlet pipe 2 is fixed on the input end of the analysis pump 1, the collecting ring 3 is fixedly installed on the inner wall of the liquid inlet pipe 2, and the bottom end of the outer wall of the liquid inlet pipe 2 is provided with a collecting and processing mechanism; the collecting and processing mechanism includes a limit block 4, a collecting tube 5, a sealing gasket 6, a pressure block 7, a connecting block 8, an electric cylinder 9, a filter hole ring 10 and a guide block 11; the collecting tube 5 is fixedly connected to the outer wall of the liquid inlet pipe 2, the limit block 4 is located in front of the liquid inlet pipe 2 and is fixedly connected on the outer wall of the collecting ring 3, and the sealing gasket 6 is squeezed at the bottom end of the collecting tube 5; the pressure block 7 is bonded to the bottom end of the sealing gasket 6, the connecting block 8 is fixed on one side of the pressure block 7, and the electric cylinder 9 is fixedly installed on the top of the connecting block 8, and the connecting block 8 and the collecting tube 5 are fixedly connected; the inner wall of the collecting ring 3 is fixedly connected to the filter hole ring 10, and the inner wall of the filter hole ring 10 is fixedly connected to the guide block 11, the collecting ring 3 is connected to the collecting tube 5, and the inner wall of the collecting ring 3 and the inner wall of the collecting tube 5 are both set to smooth surfaces. The sealing gasket 6 is made of rubber, and the cross-section of the sealing gasket 6 is rectangular; the pressing block 7 and the connecting block 8 are both made of stainless steel.

[0024] When the chromatograph of the present technical solution is used with a high-precision quantitative delivery analysis pump, the liquid inlet pipe 2 is docked on the chromatograph sample inlet pipe, and the flow meter 13 is docked on the analysis pipe of the chromatograph. By starting the analysis pump 1, the chromatograph sample liquid enters the interior of the collection ring 3, and is guided to the guide block 11 through the collection ring 3. The guide block 11 guides the liquid to the filter hole ring 10, and the filter hole ring 10 is passed through the filter hole ring 10 to achieve fitting filtration. The filtered impurities can accumulate and move downward under the action of gravity. The impurities enter the collection tube 5 along the inside of the collection ring 3 and are stored in the collection tube 5 to avoid impurities from clogging the filter hole ring 10. Later, after the analysis pump 1 can be turned off, the electric cylinder 9 is started to drive the connecting block 8 to move downward, and the connection The block 8 drives the pressure block 7 to move downward, and the pressure block 7 carries the sealing gasket 6 to move downward. The sealing gasket 6 is no longer squeezed on the bottom end of the collecting tube 5, thereby realizing the opening operation of the collecting tube 5, and the impurities inside the collecting tube 5 can be discharged downward, and the impurities collected on the filter hole ring 10 can be quickly cleaned, thereby avoiding the accumulation of impurities and causing the filter hole ring 10 to be blocked. There is enough space to collect impurities, thereby ensuring that the chromatograph sample liquid can pass through the filter hole ring 10 to avoid blockage. After the chromatograph sample liquid is pressurized, it is transported to the liquid outlet pipe 12 through the analysis pump 1, and then transported to the flow meter 13 by the liquid outlet pipe 12. The flow meter 13 realizes quantitative metering and transportation. After transportation, it can be analyzed by the chromatograph, thus realizing high-precision analysis operation.

[0025] In this technical solution, as shown in the attached Figure 5 As shown, the output end of the analytical pump 1 is fixedly connected to a liquid outlet pipe 12, and a limited support mechanism is installed at one end of the liquid outlet pipe 12. The limited support mechanism includes a flowmeter 13, a reinforcement frame 14, a support bar 15, a reinforcement block 16, a reinforcement protrusion 17, a reinforcement column 18, a tilting frame 19, and two mounting support plates 20. The flowmeter 13 is fixedly connected to one end of the liquid outlet pipe 12. The reinforcement frame 14 is fixed to the outer wall of the flowmeter 13, and the support bar 15 is located at the top of the reinforcement frame 14 and welded. The reinforcement block 16 is fixed between the support bar 15 and the liquid outlet pipe 12. The reinforcement protrusion 17 is welded to the bottom end of the reinforcement frame 14, and the reinforcement column 18 is welded to one side of the reinforcement protrusion 17. The tilting frame 19 is fixedly connected to the bottom end of the reinforcement protrusion 17. The two mounting support plates 20 are both fixed to the bottom end of the analytical pump 1. The vertical cross-section of the reinforcement frame 14 is concave, and the reinforcement frame 14 and the reinforcement protrusion 17 are both made of stainless steel. The mounting support plate 20 is fixedly connected to the tilting frame 19 , and the two mounting support plates 20 are symmetrically arranged about the middle of the analytical pump 1 .

[0026] When the present technology is in use, two mounting support plates 20 are fixed to the platform by bolts, and the analytical pump 1 is supported by the two mounting support plates 20 to increase the stability of the analytical pump 1. At the same time, the mounting support plates 20 support the tilting frame 19, the tilting frame 19 supports the reinforcing protrusion 17, and the analytical pump 1 supports the reinforcing column 18, and the reinforcing column 18 supports the reinforcing protrusion 17. The reinforcing protrusion 17 can provide a stable supporting force for the bottom end of the reinforcing frame 14, and the reinforcing frame 14 provides a stable supporting force for the outer wall of the flowmeter 13, thereby greatly improving the high stability of the flowmeter 13. The liquid outlet pipe 12 transports the chromatograph sample liquid into the flowmeter 13 for stable measurement.

[0027] The contents not described in detail in the specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the existing technology and are not described here.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-precision quantitative delivery analysis pump for a chromatograph, comprising an analysis pump (1), a liquid inlet pipe (2) and a collection ring (3), characterized in that: The liquid inlet pipe (2) is fixed on the input end of the analysis pump (1), the collecting ring (3) is fixedly mounted on the inner wall of the liquid inlet pipe (2), and a collecting and processing mechanism is provided at the bottom end of the outer wall of the liquid inlet pipe (2); The collection and processing mechanism comprises a limit block (4), a collection cylinder (5), a sealing gasket (6), a pressure block (7), a connecting block (8), an electric cylinder (9), a filter hole ring (10), and a guide block (11); The collecting cylinder (5) is fixedly connected to the outer wall of the liquid inlet pipe (2), the limiting block (4) is located in front of the liquid inlet pipe (2) and is fixedly connected to the outer wall of the collecting ring (3), and the sealing gasket (6) is squeezed at the bottom end of the collecting cylinder (5); The pressing block (7) is bonded to the bottom end of the sealing gasket (6), the connecting block (8) is fixed to one side of the pressing block (7), and the electric cylinder (9) is fixedly installed on the top end of the connecting block (8), and the connecting block (8) is fixedly connected to the collecting cylinder (5); The inner wall of the collecting ring (3) is fixedly connected to a filter hole ring (10), and the inner wall of the filter hole ring (10) is fixedly connected to a guide block (11).

2. The high-precision quantitative delivery analysis pump for chromatograph according to claim 1, characterized in that: The collecting ring (3) is connected to the collecting cylinder (5), and the inner wall of the collecting ring (3) and the inner wall of the collecting cylinder (5) are both configured as smooth surfaces.

3. The high-precision quantitative delivery analysis pump for chromatograph according to claim 1, characterized in that: The sealing gasket (6) is made of rubber material, and the cross-sectional shape of the sealing gasket (6) is set to be rectangular; The pressing block (7) and the connecting block (8) are both made of stainless steel.

4. The high-precision quantitative delivery analysis pump for chromatograph according to claim 1, characterized in that: The output end of the analysis pump (1) is fixedly connected to a liquid outlet pipe (12), and one end of the liquid outlet pipe (12) is installed with a limited support mechanism.

5. The high-precision quantitative delivery analysis pump for chromatograph according to claim 4, characterized in that: The position-limiting support mechanism comprises a flow meter (13), a reinforcement frame (14), a support bar (15), a reinforcement block (16), a reinforcement protrusion (17), a reinforcement column (18), a tilting frame (19), and two mounting support plates (20); The flow meter (13) is fixedly connected to one end of the liquid outlet pipe (12), the reinforcement frame (14) is fixed to the outer wall of the flow meter (13), and the support bar (15) is located at the top of the reinforcement frame (14) and welded, and the reinforcement block (16) is fixed between the support bar (15) and the liquid outlet pipe (12); The reinforcement protrusion (17) is welded to the bottom end of the reinforcement frame (14), and the reinforcement column (18) is welded to one side of the reinforcement protrusion (17), and the tilting frame (19) is fixedly connected to the bottom end of the reinforcement protrusion (17); The two mounting support plates (20) are both fixed to the bottom end of the analytical pump (1).

6. The high-precision quantitative delivery analysis pump for chromatograph according to claim 5, characterized in that: The vertical cross-section of the reinforcement frame (14) is concave, and the reinforcement frame (14) and the reinforcement protrusion (17) are both made of stainless steel.

7. The high-precision quantitative delivery analysis pump for chromatograph according to claim 5, characterized in that: The mounting support plate (20) is fixedly connected to the tilting frame (19), and the two mounting support plates (20) are symmetrically arranged about the middle of the analytical pump (1).

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