Automatic powder sampling device

Abstract

The utility model relates to the technical field of sampling equipment, in particular to an automatic powder sampling device. The automatic powder sampling device comprises a powder conveying pipeline, a sampling pipeline, a middle transfer powder bin and a control box, the inlet end of the sampling pipeline is communicated with a powder conveying pipeline, a control valve is arranged on the sampling pipeline, and the control valve is connected with the control box; a pressure sensor is arranged at the upstream of the control valve and is connected with the control box; and the middle transfer powder bin is communicated with the outlet end of the sampling pipeline. According to the automatic powder sampling device, original single-point sampling can be upgraded to multi-point sampling mixing, various average indexes of limestone powder of a tank truck can be reflected better, and the accuracy and safety of limestone powder monitoring are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling equipment, in particular to an automatic powder sampling device. Background Art

[0002] At present, the sampling of limestone powder and calcium oxide powder in the power, chemical, cement, ceramic and other industries mainly adopts the method of installing manual sampling pipes on the powder conveying pipes or installing automatic timed sampling devices on the powder conveying pipes. Among them, the manual sampling pipes installed on the powder conveying pipes require the operating personnel to cooperate with the tank truck personnel to take samples at any time. The time and frequency are not fixed, and the sampling volume is difficult to control, especially at night. The safety risk is relatively high. The automatic timed sampling device is installed on the powder conveying pipe. This sampling method sets the sampling time interval. Regardless of whether there is a tank truck to unload the powder, the automatic sampling device is always running, which greatly wastes the gas source and damages the valve, resulting in a waste of resources. Utility Model Content

[0003] The purpose of the utility model is to provide an automatic powder sampling device, which can be upgraded from the original single-point sampling to multi-point sampling and mixing, and can better reflect various average indicators of limestone powder in tank trucks, thereby enhancing the accuracy and safety of limestone powder monitoring.

[0004] The utility model provides an automatic powder sampling device, comprising a powder conveying pipeline, a sampling pipeline, a transfer powder receiving bin and a control box;

[0005] The inlet end of the sampling pipeline is communicated with the powder conveying pipeline, and a control valve is provided on the sampling pipeline, and the control valve is connected to the control box;

[0006] A pressure sensor is provided upstream of the control valve, and the pressure sensor is connected to the control box;

[0007] The intermediate powder receiving bin is communicated with the outlet end of the sampling pipeline.

[0008] Preferably, the control valve is a pneumatic ball valve, and the sampling pipeline is also provided with a compressed air input end.

[0009] Further preferably, the compressed air input end and the pneumatic ball valve are provided in two groups.

[0010] Preferably, the sampling pipeline and the powder conveying pipeline are arranged vertically.

[0011] Preferably, the intermediate powder receiving bin comprises an upper part, a middle part and a lower part;

[0012] The upper part includes a breathing valve and a gas-solid separator, and the gas-solid separator is arranged at the lower end of the breathing valve;

[0013] The upper and lower ends of the middle part are both provided with quick-connect chucks, the middle part is connected to the upper part through a first quick-connect chuck, and the middle part is connected to the lower part through a second quick-connect chuck;

[0014] The lower part comprises a feed pipe and a pneumatic butterfly valve, and the pneumatic butterfly valve is arranged at the upper end of the feed pipe.

[0015] Further preferably, a filter element is arranged in the breathing valve.

[0016] Further preferably, the breathing valve is arranged in a small square box, and sound-absorbing and noise-reducing adsorption cotton is also arranged inside the small square box.

[0017] Further preferably, two groups of intermediate powder receiving bins are provided.

[0018] Preferably, a display screen is provided in the control box.

[0019] Beneficial effects:

[0020] The technical solution of the utility model is connected to the control box through a pressure sensor. When the limestone powder is transported, a certain positive pressure is generated in the powder conveying pipeline. When the pressure sensor signal is determined to be reliable and stable, the control valve on the sampling pipeline is opened through the control box to start sampling. Sampling is automatically performed once at a fixed interval. After multiple samplings, the samples enter the transfer powder receiving bin for temporary storage. After a fixed interval, the entire device automatically stops working and the sampling is completed. The original single-point sampling is upgraded to a multi-point sampling mixture, which can better reflect the various average indicators of the limestone powder in the tank truck and enhance the accuracy and safety of limestone powder monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the structure of the automatic powder sampling device of the utility model;

[0023] Figure 2 It is a side view of the automatic powder sampling device of the utility model;

[0024] Figure 3 It is a top view of the automatic powder sampling device of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of Example 2 of the utility model.

[0026] Description of reference numerals:

[0027] 1: Powder conveying pipeline; 2: Pressure sensor; 3: Pneumatic ball valve; 4: Compressed air input end; 5: Gas-solid separator; 6: Control box; 7: Breathing valve; 8: First quick-connect chuck; 9: Second quick-connect chuck; 10: Pneumatic butterfly valve; 11: Feeding pipe; 12: Transfer powder receiving bin; 13: Sampling pipeline. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] like Figures 1 to 4As shown, the utility model provides an automatic powder sampling device, which includes a powder conveying pipeline 1, a sampling pipeline 13, a transfer powder receiving bin 12 and a control box 6. The inlet end of the sampling pipeline 13 is connected to the powder conveying pipeline 1, and a control valve is provided on the sampling pipeline 13, and the control valve is connected to the control box 6. A pressure sensor 2 is provided upstream of the control valve, and the pressure sensor 2 is connected to the control box 6. The transfer powder receiving bin 12 is connected to the outlet end of the sampling pipeline 13. Specifically, in this embodiment, the pressure sensor 2 is a diaphragm pressure transmitter.

[0032] The technical solution of the utility model is connected to the control box 6 through the pressure sensor 2. When the limestone powder is transported, a certain positive pressure is generated in the powder conveying pipeline 1. When the signal of the pressure sensor 2 is determined to be reliable and stable, the control valve on the sampling pipeline 13 is opened through the control box 6 to start sampling. Sampling is automatically performed once at a fixed interval. After multiple samplings, the sample enters the transfer powder receiving bin 12 for temporary storage. After a fixed interval, the entire device automatically stops working and the sampling is completed. The original single-point sampling is upgraded to multi-point sampling and mixing, which can better reflect the various average indicators of the limestone powder in the tank truck and enhance the accuracy and safety of limestone powder monitoring.

[0033] The control valve is a pneumatic ball valve 3 , and a compressed air input port 4 is also provided on the sampling pipeline 13 .

[0034] The sampling pipeline 13 is arranged vertically with the powder conveying pipeline 1. Specifically, the sampling pipeline 13 is installed at 1.5 m of the vertical section of the powder conveying pipeline 1.

[0035] The powder transfer bin 12 includes an upper part, a middle part and a lower part. Specifically, one powder transfer bin 12 can transfer and store 5 kg of samples, which can meet the daily material volume.

[0036] The upper part includes a breathing valve 7 and a gas-solid separator 5. The gas-solid separator 5 is arranged at the lower end of the breathing valve 7. A filter element is arranged in the breathing valve 7. By arranging the gas-solid separator 5, the excess gas is passed into the breathing valve 7, and the solid falls into the middle part of the intermediate powder receiving bin 12. Specifically, the exhaust volume of the filter element is greater than or equal to 0.2m 2 In this embodiment, the filter element is a cotton filter element.

[0037] The breathing valve 7 is arranged in the small square box, and the inside of the small square box is also provided with sound-absorbing and noise-reducing adsorption cotton. Excess gas is discharged into the atmosphere through the breathing valve 7, and a filter cotton filter element is arranged in the breathing valve 7 to remove dust particles to ensure that the environment is not polluted.

[0038] The upper and lower ends of the middle part are provided with quick-connect chucks. The middle part is connected to the upper part through the first quick-connect chuck 8, and the middle part is connected to the lower part through the second quick-connect chuck 9. The quick-connect chuck can realize the quick disassembly of the transfer powder bin, which is convenient to use. If the device needs to be repaired, the quick-connect chuck can also be disassembled to achieve the purpose of repair.

[0039] The lower part includes a feed pipe 11 and a pneumatic butterfly valve 10, and the pneumatic butterfly valve 10 is arranged at the upper end of the feed pipe 11. The pneumatic butterfly valve 10 can be used to achieve fast opening and closing and reduce vibration.

[0040] A display screen is provided in the control box 6. Specifically, the entire powder sampling device is designed with an integrated box made of 304 stainless steel, and the inner cabinet door is designed to install a display screen, which has good sealing performance and can avoid secondary environmental pollution during the sampling process. This design has high safety, reliability and economy.

[0041] Specifically, the control program set in the control box 6 adopts a PLC control assembly. According to the actual needs of automatic sampling, the logical relationship and timing process of sampling are analyzed, and a control model for automatic sampling of limestone powder is established based on programmable logic devices and single-chip microcomputer technology, the signal control timing diagram of each actuator is determined, and the corresponding control program and software interface are compiled. It should be particularly noted that the control program and software interface used in the automatic powder sampling device are all existing technologies and do not involve improvements in methods, procedures and circuits.

[0042] Working process:

[0043] The utility model makes full use of the pressure sensor 2 in the limestone powder conveying pipeline 1 as the signal source of the whole system. When the limestone powder is conveyed, a certain positive pressure is established in the powder conveying pipeline 1 and the upstream of the sampling pipeline 13. When the control box 6 determines that the signal of the pressure sensor 2 is reliable and stable for 3 minutes, it issues a command to enter the sampling stage, and the sampling device starts to work to realize automatic sampling once every 8 minutes, each time sampling 60-100g. After three samplings, the sample enters the transfer powder receiving bin 12 for temporary sealing. After 60 seconds, the sampling assembly automatically stops working to complete the whole sampling process.

[0044] like Figure 4 The example 2 of the utility model is shown. In this example, two sets of intermediate powder receiving bins 12 are provided, and two sets of compressed air input ports 4 and pneumatic ball valves 3 are provided correspondingly. The other parts are the same as those of the example 1, and will not be described again.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A powder automatic sampling device, characterized in that: It includes powder conveying pipeline, sampling pipeline, transfer powder receiving bin and control box; The inlet end of the sampling pipeline is communicated with the powder conveying pipeline, and a control valve is provided on the sampling pipeline, and the control valve is connected to the control box; A pressure sensor is provided upstream of the control valve, and the pressure sensor is connected to the control box; The intermediate powder receiving bin is communicated with the outlet end of the sampling pipeline.

2. The automatic powder sampling device according to claim 1, characterized in that: The control valve is a pneumatic ball valve, and a compressed air input end is also provided on the sampling pipeline.

3. The automatic powder sampling device according to claim 2, characterized in that: The compressed air input end and the pneumatic ball valve are provided in two groups.

4. The automatic powder sampling device according to claim 1, characterized in that: The sampling pipeline is arranged vertically to the powder conveying pipeline.

5. The automatic powder sampling device according to claim 1, characterized in that: The intermediate powder receiving bin comprises an upper part, a middle part and a lower part; The upper part includes a breathing valve and a gas-solid separator, and the gas-solid separator is arranged at the lower end of the breathing valve; The upper and lower ends of the middle part are both provided with quick-connect chucks, the middle part is connected to the upper part through a first quick-connect chuck, and the middle part is connected to the lower part through a second quick-connect chuck; The lower part comprises a feed pipe and a pneumatic butterfly valve, and the pneumatic butterfly valve is arranged at the upper end of the feed pipe.

6. The automatic powder sampling device according to claim 5, characterized in that: A filter element is arranged in the breathing valve.

7. The automatic powder sampling device according to claim 5, characterized in that: The breathing valve is arranged in a small square box, and sound-absorbing and noise-reducing adsorption cotton is also arranged inside the small square box.

8. The automatic powder sampling device according to claim 5, characterized in that: The intermediate powder receiving bins are provided with two groups.

9. The automatic powder sampling device according to claim 1, characterized in that: A display screen is arranged in the control box.

Images