Automatic sampling device for process slurry

Abstract

The utility model discloses an automatic process slurry sampling device which comprises a process slurry main pipeline and an automatic sampling mechanism connected to the process slurry main pipeline, and the automatic sampling mechanism comprises a sampling pipe, a cleaning pipe, a clear water supply pipe, a blow-off pipe, a sampling cup, a translation mechanism and a control system; the sampling pipe is connected with a process slurry main pipeline, and a first sampling valve and a second sampling valve which are distributed at an interval are arranged on the sampling pipe; one end of the cleaning pipe is connected with the sampling pipe and is positioned at the downstream of the connection point of the first sampling valve and the sampling pipe; the other end of the cleaning pipe is connected with a clean water supply pipe; a sewage disposal valve is arranged on the cleaning pipe; the blow-off pipe end is connected with the sampling pipe, and the connection point is located at the upstream of the second sampling valve; a blow-off valve is arranged on the blow-off pipe; the translation mechanism drives the sampling cup to move to an outlet of the second sampling valve; and the first sampling valve, the second sampling valve, the sewage disposal valve, the sewage discharge valve and the translation mechanism are electrically connected with the control system. The utility model overcomes the technical problem of manual collection of slurry in the process.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid on-line sampling, in particular to an automatic sampling device for process slurry. Background Technique

[0002] At present, during the production process of enterprises in wet smelting such as alumina, it is often necessary to collect a part of raw materials or slurry from the process conveying pipeline for routine analysis, and test parameters such as the concentration, content, particle size and composition of the process slurry. The production department adjusts the production process flow in real time according to the quality inspection and test results to improve product quality. In the prior art, the work of sampling process slurry is manually performed by sampling personnel. The sampling personnel regularly place a sampling cup at the outlet of the sampling pipe and manually control the opening of the sampling valve to collect a certain amount of process slurry. Manual sampling has many defects: 1. Affected by subjective factors, the representativeness and accuracy of sampling are poor and the fluctuation is large. 2. The sampling frequency of manual sampling is small and the universality is poor, and the interval time has a large deviation from the actual situation. 3. The manual procedure of manual sampling is cumbersome, and the workload and labor intensity are relatively large. 4. Manual sampling may directly contact the high-temperature and corrosive process slurry due to operating the manual valve, which has great danger. Therefore, in order to solve the above technical problems, it is necessary to design an automatic sampling device for process slurry. Content of the Utility Model

[0003] The utility model provides an automatic sampling device for process slurry, which overcomes the technical problems of manual collection of process slurry, realizes automatic control, improves the representativeness, timeliness and accuracy of process slurry collection, and reduces the labor intensity and production danger.

[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] An automatic sampling device for process slurry, comprising a main process slurry pipeline and an automatic sampling mechanism connected to the main process slurry pipeline. The automatic sampling mechanism includes a sampling pipe, a cleaning pipe, a clean water supply pipe, a sewage pipe, a sampling cup, a translation mechanism and a control system. One end of the sampling pipe is connected to the main process slurry pipeline, and the sampling pipe is provided with a first sampling valve and a second sampling valve distributed at intervals. One end of the cleaning pipe is connected to the sampling pipe, and the connection point of the cleaning pipe and the sampling pipe is located downstream of the connection point of the first sampling valve and the sampling pipe. The other end of the cleaning pipe is connected to the clean water supply pipe. A cleaning and sewage valve is provided on the cleaning pipe. One end of the sewage pipe is connected to the sampling pipe, and the connection point is located upstream of the second sampling valve. A sewage valve is provided on the sewage pipe. The sampling cup is placed on the translation mechanism and is located below the second sampling valve. The translation mechanism drives the sampling cup to translate and move to the outlet of the second sampling valve. The first sampling valve, the second sampling valve, the cleaning and sewage valve, the sewage valve and the translation mechanism are all electrically connected to the control system.

[0006] Further, the translation mechanism includes an electric push rod and a placement rack installed on the output shaft of the electric push rod. The placement rack is provided with a placement groove, and the sampling cup is embedded in the placement groove. The output shaft of the electric push rod drives the placement rack to translate, so as to drive the sampling cup to align with or move away from the outlet of the second sampling valve.

[0007] Further, the placement rack is provided with a plurality of placement grooves arranged side by side at intervals, and each placement groove is provided with a sampling cup.

[0008] Further, the bottom of each placement groove is set as a cross grid.

[0009] As one of the preferred solutions, the first sampling valve, the second sampling valve, the cleaning and sewage valve, and the sewage valve are all electric switch valves.

[0010] As another preferred solution, the first sampling valve is set as a Y-shaped electric valve, and one end of the cleaning pipe is connected to the horizontal end of the Y-shaped electric valve. The second sampling valve, the cleaning and sewage valve, and the sewage valve are all electric switch valves.

[0011] Further, the automatic sampling mechanism further includes an alarm, and the alarm is electrically connected to the control system.

[0012] Further, a plurality of automatic sampling mechanisms can be provided on the main process slurry pipeline to work simultaneously.

[0013] The beneficial effects of the utility model are:

[0014] 1) Without affecting the main process production, the utility model can continuously extract multiple detection samples online at regular intervals and in fixed quantities, improving the automation level and working efficiency of the process; by automatically controlling the operation of each valve through the control system, during the entire sampling process, according to the type, characteristics, and production control requirements of the slurry in the production process, the sampling time, sampling frequency, and sampling quantity are determined, achieving full automatic control without being affected by human factors, and greatly improving the representativeness, timeliness, and accuracy of the process slurry collection.

[0015] 2) In the sampling mode, the cleaning valve and the sewage discharge valve are closed, the first sampling valve (when the first sampling valve is a Y-type electric valve, the flow direction is switched to straight-through flow and lateral closure at this time) and the second sampling valve are continuously opened for a period of time. After the slurry properties are stable, the electric push rod pushes the sampling cup to receive the sample. After receiving a certain amount of process slurry sample according to the set time, the first sampling valve and the second sampling valve are immediately closed. The sampling cup is taken away by manual collection, and an empty sampling cup is manually placed into the placement groove, thus completing a complete sampling operation.

[0016] 3) In the cleaning mode, the first sampling valve (when the first sampling valve is a Y-type electric valve, the flow direction is switched to straight-through closure and lateral flow at this time) and the second sampling valve are closed, the cleaning valve and the sewage discharge valve are opened, clean water is connected to the sampling pipe after the first sampling valve and discharged from the sewage pipe in front of the second sampling valve. The control system controls the cleaning valve and the sewage discharge valve to open and close simultaneously multiple times to intermittently flush the sampling pipe and complete the cleaning work of the sampling pipe. This step can be executed after each sampling to ensure the accuracy of the next sampling operation.

[0017] 4) The bottom of the placement groove is set as a cross-shaped grid, so that even if the process slurry splashes out, it will not remain in the placement groove, which is convenient for cleaning.

[0018] 5) Since the alumina slurry is relatively viscous and there are many particulate matters in the slurry, the advantage of using a Y-type electric valve for the first sampling valve is that the clean water for flushing the pipe in the cleaning mode directly enters the Y-type electric valve, which can take away the residual viscous slurry in the Y-type electric valve and avoid valve blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following further elaborates on the specific embodiments of the utility model in conjunction with the drawings, where:

[0020] Figure 1 is a schematic structural diagram of Embodiment 1 of the utility model;

[0021] Figure 2 is a schematic structural diagram of Embodiment 2 of the utility model;

[0022] Reference Signs in the Drawings:

[0023] 1 - Main process slurry pipeline, 2 - Sampling pipe, 3 - Cleaning pipe, 4 - Clean water supply pipe 5 - Drain pipe, 6 - Sampling cup, 7 - Translation mechanism, 8 - Control system, 9 - Alarm, 21 - First sampling valve, 22 - Second sampling valve, 31 - Cleaning and sewage valve, 51 - Drain valve, 71 - Electric push rod, 72 - Storage rack. Detailed implementation manner

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. When a part is referred to as being "disposed in the middle", it is not only disposed at the exact middle position, as long as it is not disposed at the two end parts, it belongs to the range defined by the middle part. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] Embodiment 1:

[0028] Refer to Figure 1As shown in the figure, a process slurry automatic sampling device includes a main process slurry pipeline 1 and an automatic sampling mechanism connected to the main process slurry pipeline 1. The automatic sampling mechanism includes a sampling pipe 2, a cleaning pipe 3, a clean water supply pipe 4, a sewage discharge pipe 5, a sampling cup 6, a translation mechanism 7, and a control system 8. One end of the sampling pipe 2 is connected to the main process slurry pipeline 1, and first sampling valves 21 and second sampling valves 22 are arranged at intervals on the sampling pipe 2. One end of the cleaning pipe 3 is connected to the sampling pipe 2, and the connection point of the cleaning pipe 3 and the sampling pipe 2 is located downstream of the connection point of the first sampling valve 21 and the sampling pipe 2. The other end of the cleaning pipe 3 is connected to the clean water supply pipe 4, and the clean water supply pipe 4 is used to supply clean water. A sewage cleaning valve 31 is arranged on the cleaning pipe 3. One end of the sewage discharge pipe 5 is connected to the sampling pipe 2, and the connection point is located upstream of the second sampling valve 22. A sewage discharge valve 51 is arranged on the sewage discharge pipe 5. The sampling cup 6 is placed on the translation mechanism 7 and is located below the second sampling valve 22. The translation mechanism 7 drives the sampling cup 6 to translate to the outlet of the second sampling valve 22 to receive the slurry sample coming out of the second sampling valve 22. The first sampling valve 21, the second sampling valve 22, the sewage cleaning valve 31, and the sewage discharge valve 51 are all electric switch valves. The first sampling valve 21, the second sampling valve 22, the sewage cleaning valve 31, the sewage discharge valve 51, and the translation mechanism 7 are all electrically connected to the control system 8 and cooperate with each other under the control of the control system 8. Among them, the first sampling valve 21, the sewage cleaning valve 31, and the sewage discharge valve 51 all adopt electric switch valves, and the second sampling valve 22 adopts an electric butterfly valve, and the flow rate of the slurry sample can be adjusted by adjusting the opening degree. The control system 8 can adopt a PLC programmable controller. The automatic sampling mechanism further includes an alarm 9, and the alarm 9 is electrically connected to the control system 8.

[0029] In this embodiment, the translation mechanism 7 includes an electric push rod 71 and a storage rack 72 installed on the output shaft of the electric push rod 71. A placement groove is provided on the storage rack 72, and the bottom of each placement groove is a cross grid. The sampling cup 6 is embedded in the placement groove. The output shaft of the electric push rod 71 drives the storage rack 72 to move translationally, so as to drive the sampling cup 6 to align with or move away from the outlet of the second sampling valve 22. Of course, according to the number of samples to be collected, a number of placement grooves arranged side by side at intervals can also be provided on the storage rack 72, and a sampling cup 6 is arranged on each placement groove. Generally, the flow rate of the slurry sample can be controlled by the opening degree of the second sampling valve 22, and the sample is collected at the most appropriate flow rate as much as possible to avoid slurry splashing. In order to further prevent the flowing slurry sample from splashing onto the electric push rod 71, a protective cover 73 can be provided on the periphery of the electric push rod 71. The protective cover 73 is provided with an avoidance hole corresponding to the output end of the electric push rod 71, and a rubber ring is used for sealing between the avoidance hole and the output shaft. The bottom of the placement groove is a cross grid, so that even if slurry splashes out, it will not remain in the placement groove, which is convenient for cleaning.

[0030] The utility model can be applied to the sample collection work under different processes of the process slurry main pipeline 1. For example, a number of automatic sampling mechanisms are arranged under the process slurry main pipeline 1 to work simultaneously. Corresponding to different process stages, samples after different processes can be collected to monitor the production quality of each process in real time and improve the product quality.

[0031] The utility model can continuously extract multiple test samples online at regular intervals and quantitatively without affecting the main process production process, improving the automation degree and work efficiency of the process. The operation of each valve is automatically controlled by the control system 8. During the whole sampling process, according to the type, characteristics and production control requirements of the slurry in the production process, the sampling time, sampling frequency and sampling volume are determined, and automatic control is completely realized, without being affected by human factors, greatly improving the representativeness, timeliness and accuracy of the process slurry collection. The utility model has a wide application range and can be popularized and implemented in industries such as alumina, hydrometallurgy of copper, lead and zinc.

[0032] The specific working principle of the utility model is as follows:

[0033] 1) In the standby mode, all valves are closed, the electric push rod 71 is reset, and the control system 8 is in a waiting state until the sampling mode or cleaning mode is set manually before corresponding actions are taken.

[0034] 2) In the sampling mode, close the cleaning valve 31 and the sewage discharge valve 51, continuously open the first sampling valve 21 and the second sampling valve 22 for a period of time. After the slurry property is stable, the electric push rod 71 pushes the sampling cup 6 to receive the sample. After receiving a certain amount of process slurry sample according to the set time, immediately close the first sampling valve 21 and the second sampling valve 22. The sampling cup 6 is collected and taken away manually, and an empty sampling cup 6 is manually placed into the placement groove here, thus completing a complete sampling operation.

[0035] 3) In the cleaning mode, close the first sampling valve 21 and the second sampling valve 22, open the cleaning valve 31 and the sewage discharge valve 51, connect clear water to the sampling pipe after the first sampling valve 21, and discharge it from the sewage pipe in front of the second sampling valve. The control system controls the cleaning valve 31 and the sewage discharge valve 51 to switch on and off simultaneously multiple times to intermittently flush the sampling pipe 2 and complete the cleaning work of the sampling pipe. This step can be executed after each sampling to ensure the accuracy of the next sampling operation.

[0036] Embodiment 2:

[0037] Different from Embodiment 1, the first sampling valve 21 is set as a Y-type electric valve, and one end of the cleaning pipe 3 is connected to the horizontal end of the Y-type electric valve 21. In the sampling mode, the flow direction of the first sampling valve 21 is switched to straight-through flow and the horizontal direction is closed, and the control of other valves is the same as that in the embodiment; in the cleaning mode, the flow direction of the first sampling valve 21 is switched to straight-through closed and the horizontal direction is in flow, and the control of other valves is the same as that in the embodiment. Since the alumina slurry is relatively viscous and there are more particulate matters in the slurry, the advantage of such a design is that in the cleaning mode, the clear water in the cleaning pipe 3 directly enters the Y-type electric valve, which can take away the residual viscous slurry in the Y-type electric valve and avoid valve blockage.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the technical solutions of the present invention.

Claims

1. An automatic sampling device for process slurry, comprising a main pipeline for process slurry and an automatic sampling mechanism connected to the main pipeline for process slurry, characterized in that, The automatic sampling mechanism includes a sampling pipe, a cleaning pipe, a clean water supply pipe, a sewage discharge pipe, a sampling cup, a translation mechanism and a control system; one end of the sampling pipe is connected to the main process slurry pipeline, and first sampling valves and second sampling valves are arranged on the sampling pipe at intervals; one end of the cleaning pipe is connected to the sampling pipe, and the connection point of the cleaning pipe and the sampling pipe is located downstream of the connection point of the first sampling valve and the sampling pipe; the other end of the cleaning pipe is connected to the clean water supply pipe; a cleaning and sewage discharging valve is arranged on the cleaning pipe; one end of the sewage discharge pipe is connected to the sampling pipe, and the connection point is located upstream of the second sampling valve; a sewage discharge valve is arranged on the sewage discharge pipe; the sampling cup is placed on the translation mechanism and is located below the second sampling valve, and the translation mechanism drives the sampling cup to translate to the outlet of the second sampling valve; the first sampling valve, the second sampling valve, the cleaning and sewage discharging valve, the sewage discharge valve and the translation mechanism are all electrically connected to the control system.

2. The automatic sampling device for process slurry according to claim 1, wherein The translation mechanism includes an electric push rod and a placing rack installed on the output shaft of the electric push rod, and a placing groove is arranged on the placing rack, and the sampling cup is embedded in the placing groove; the output shaft of the electric push rod drives the placing rack to translate, so as to drive the sampling cup to align with or move away from the outlet of the second sampling valve.

3. The automatic sampling device for process slurry according to claim 2, wherein A plurality of placing grooves are arranged on the placing rack side by side at intervals, and one sampling cup is arranged on each placing groove.

4. The automatic sampling device for process slurry according to claim 3, wherein, The bottom of each placing groove is provided with a cross grid.

5. The automatic sampling device for process slurry according to claim 1, wherein, The first sampling valve, the second sampling valve, the cleaning and sewage discharging valve and the sewage discharge valve are all electric switch valves.

6. The automatic sampling device for process slurry according to claim 1, wherein, The first sampling valve is set as a Y-shaped electric valve, and one end of the cleaning pipe is connected to the horizontal end of the Y-shaped electric valve; the second sampling valve, the cleaning and sewage discharging valve and the sewage discharge valve are all electric switch valves.

7. The automatic sampling device for process slurry according to claim 1, wherein The automatic sampling mechanism further includes an alarm, and the alarm is electrically connected to the control system.

8. A process slurry automatic sampling device according to any one of claims 1 to 7, characterized in that, A plurality of automatic sampling mechanisms can be arranged on the main process slurry pipeline to work simultaneously.

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