Powder sampling equipment

Abstract

The utility model discloses powder sampling equipment, which comprises an equipment frame, a sampling device, a sampling device and a control device, wherein the equipment frame is used as a mounting base of the sampling device; the mixing and weighing device is arranged on the equipment frame, the mixing and weighing device comprises a stirring stock bin and one or more weighing assemblies, the weighing assemblies are arranged at the joint of the mixing and weighing device and the equipment frame and connected with the outer side of the stirring stock bin, the stirring stock bin comprises a stock bin discharge port, and the stirring stock bin discharge port is connected with the equipment frame. The stock bin discharge port is positioned at the lower part of the stirring stock bin; the conveying device is located below the stirring stock bin, the conveying device is connected with a discharge port of the stock bin, and the conveying device and the mixing and weighing device are integrally supported by a weighing assembly on the equipment frame.

Description

Technical Field

[0001] The utility model relates to the technical field of powder sample sampling, in particular to a powder material sampling device. Background Art

[0002] When sampling some powdered materials, such as cement, multiple processes such as screening and mixing may be required, and it is difficult to ensure the accurate weighing range of the sampled samples. Moreover, the main sampling methods currently used are vacuum pipe sampling and centralized sampling, as well as pneumatic sampling and centralized processing. These methods easily cause mixing of samples from upper and lower batches. If there is no good way to solve it, it will affect the authenticity of sample performance and quality, thereby losing the guiding value for material production. At the same time, when gas and powder are mixed, there is a serious collision in the pipeline, which will cause pipeline wear and need to be replaced regularly. The sampling equipment has a short service life, high cost, unstable gas source, complex overall equipment and long production line, and cannot be well repaired and maintained when the equipment is damaged. Improvements are needed in these aspects.

[0003] The prior art CN218925251U discloses an automatic screening and sampling system for powders, which includes a sealed bin, a storage hopper and a screen. The storage hopper is arranged on one side of the sealed bin, and a collecting hopper is arranged along the inner wall of the storage hopper. The collecting hopper is connected to the inside of the sealed bin and a lifting mechanism is arranged. The lifting mechanism is used to transport dust at the collecting hopper to the sealed bin. The screen is arranged inside the sealed bin, and a vibration motor is arranged at the screen. Weighing mechanisms are arranged above and below the screen. The sealed bin, the collecting hopper and the lifting mechanism are arranged.

[0004] The prior art CN114988121A discloses an automatic sampling and weighing system for an air-powder mixing pipeline, which uses the negative pressure suction principle to suck the air-powder mixture into a cyclone separator, and then discharges the air into the air-powder mixing pipeline. The separated coal powder is automatically weighed by a weighing sensor, and the powder after weighing is blown into the air-powder mixing pipeline - the original sampling pipeline - by compressed air.

[0005] None of the above prior arts proposes a solution to the above problems.

[0006] In view of the above technical problems, the present utility model is specially introduced. Summary of the invention

[0007] The main purpose of the utility model is to provide a powder sampling device for solving the problems of inaccurate weighing range of sampled samples and mixing of upper and lower batches of samples.

[0008] In order to achieve the above-mentioned purpose, the utility model proposes a powder sampling device, comprising: an equipment frame, the equipment frame serving as an installation base for the sampling device; a mixing weighing device, the mixing weighing device being arranged on the equipment frame, the mixing weighing device comprising a stirring silo and one or more weighing components, the weighing components being arranged at the connection between the mixing weighing device and the equipment frame, the weighing components being connected to the outer side of the stirring silo, the stirring silo comprising a silo discharge port, the silo discharge port being located at the lower part of the stirring silo; a conveying device, the conveying device being located below the stirring silo, the conveying device being connected to the silo discharge port, the conveying device and the mixing weighing device being supported as a whole by the weighing component on the equipment frame.

[0009] Furthermore, a plurality of weighing components are evenly distributed on the circumferential outer side of the mixing silo, and the weighing components have weighing sensors.

[0010] Furthermore, the number of weighing components is set to three, the outer wall of the mixing silo has a conical structure, and the three weighing components are connected to the outer wall of the mixing silo.

[0011] Furthermore, a dust collecting port is arranged on the top of the mixing silo, a dust collecting hose is connected to the dust collecting port, and a control valve is arranged at the dust collecting port.

[0012] Furthermore, a silo feed port is provided on the top of the mixing silo, and a feed hose is connected to the silo feed port.

[0013] Furthermore, the sampling equipment also includes a rotary vibrating screen, which has a rotary vibration device and a screen. The rotary vibrating screen is arranged on the equipment frame. The rotary vibrating screen includes a slag discharge port and a rotary vibrating screen discharge port. The rotary vibrating screen discharge port is connected to a feed hose.

[0014] Furthermore, the sampling device also includes a quantitative sampling unit, which is connected to the top of the rotary vibrating screen and is connected to the powder silo.

[0015] Furthermore, the conveying device is configured as a quantitative screw conveying device, which includes a feeding screw, the top of which is connected to the silo discharge port, a screw driver is provided at one end of the feeding screw, and a filling port is provided at the other end.

[0016] Furthermore, the sampling device also includes a control system, which is connected to the screw drive and the weighing component.

[0017] Furthermore, the sampling device also includes a filling mechanism, which is arranged on the device frame, the filling mechanism is located below the filling port, and the filling mechanism is connected to the filling port through a hose.

[0018] By applying the technical solution of the utility model, at least the following beneficial effects are achieved:

[0019] 1. The sampling equipment of the utility model is designed so that the weight of the entire conveying device and the mixing weighing device is supported by the weighing assembly on the equipment frame. The above devices are weighed together with the powder. While stirring, mixing and conveying are performed at the same time, the weighing accuracy of the weighing assembly is guaranteed, and its accuracy can reach ±0.5%, thereby being able to provide material samples with accurate weight.

[0020] 2. The sampling equipment of the utility model designs the layout of the weighing components, so that the overall support for the conveying device and the mixed weighing device is more stable and the weighing is more accurate. By further designing the conveying device and the mixed weighing device to be connected to other external devices with a hose, it is ensured that the entire weight is supported by the weighing components, which is also conducive to improving the weighing accuracy.

[0021] 3. The sampling equipment of the utility model can recycle the residual powder in the equipment by designing the dust collecting port and the control valve, so that the samples of each batch will not be mixed and will not cause batch contamination of the pipeline.

[0022] 4. The sampling device of the utility model can realize accurate control of the feeding rate by designing a quantitative spiral conveying device and a control system, which is conducive to providing material samples of accurate weight and makes the sampling device more automated.

[0023] 5. The sampling device of the utility model realizes rough measurement by adopting quantitative sampling units, reduces the waste of powder, and adopts the method of on-site installation. The device has a compact structure and small size, can be flexibly installed and disassembled, and the cost of installation and maintenance of the sampling device is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0025] Figure 1 A front view of a precise powder sampling device according to one embodiment is shown;

[0026] Figure 2 A front view of a mixing weighing device and a conveying device according to one embodiment is shown;

[0027] Figure 3 A schematic diagram of a filling mechanism according to an embodiment is shown.

[0028] The above drawings include the following reference numerals:

[0029] 1. Equipment frame; 2. Mixing and weighing device; 21. Mixing silo; 22. Weighing assembly; 23. Silo discharge port; 24. Dust collection port; 25. Silo feed port; 26. Paddle; 27. Mixing drive; 3. Conveying device; 31. Feeding screw; 32. Screw drive; 33. Filling port; 4. Filling mechanism; 41. Dust collection valve; 42. Hose interface; 43. Tensioning weight; 44. Pull rope; 45. Pull plate; 46. Cylinder; 47. Follower; 48. Rigid expansion joint; 49. Lower hopper; 5. Vibrating screen; 51. Slag discharge port; 52. Vibrating screen discharge port; 6. Quantitative sampling unit; 7. Powder silo. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] The present invention is further described in detail below in conjunction with specific embodiments, and these embodiments cannot be understood as limiting the scope of protection claimed by the present invention. The term "including" indicates the existence of a feature when used, but does not exclude the existence or addition of one or more other features; the orientation or position relationship indicated by the terms "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0032] In the description, it should be noted that, unless otherwise clearly specified and limited, 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication 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. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0033] Example:

[0034] The utility model proposes a powder sampling device, and this embodiment provides an automated technical solution for quantitative sampling, sieving, mixing and accurate weighing of cement powder. Figure 1As shown, it includes an equipment frame 1, a mixing weighing device 2 and a conveying device 3. The equipment frame 1 serves as a mounting base for the sampling device, and the mixing weighing device 2 is arranged on the equipment frame 1. The conveying device 3 is located below the mixing weighing device 2 and connected to the mixing weighing device 2.

[0035] Specifically, combined Figure 1 and Figure 2 As shown, the mixing weighing device 2 includes a mixing silo 21 and one or more weighing components 22, and the weighing components 22 are arranged at the connection between the mixing weighing device 2 and the equipment frame 1. The weighing components 22 are connected to the outer side of the mixing silo 21. The mixing silo 21 includes a silo discharge port 23, and the silo discharge port 23 is located at the lower part of the mixing silo 21.

[0036] The conveying device 3 is located below the mixing silo 21, and is connected to the silo discharge port 23. The conveying device 3 and the mixing weighing device 2 are supported by a weighing assembly 22 on the equipment frame 1 as a whole, and the weighing assembly 22 has a weighing sensor. The conveying device and the mixing weighing device are weighed together with the powder material, and when the weighing sensor feedback shows that the total mass is reduced by a set value, the conveying device can stop conveying. In the case of simultaneous stirring, mixing and conveying, the weighing accuracy of the weighing assembly is guaranteed, and its accuracy can reach ±0.5%, thereby being able to provide a material sample of accurate weight.

[0037] Preferably, a plurality of weighing assemblies 22 are evenly distributed on the circumferential outer side of the mixing silo 21. The number of weighing assemblies 22 can be set to three, the outer wall of the mixing silo 21 has a conical structure, and the three weighing assemblies 22 are fixed on the outer wall of the mixing silo 21. The arrangement of the weighing assemblies makes the support for the conveying device and the mixing weighing device as a whole more stable and the weighing more accurate.

[0038] like Figure 2 As shown, a paddle 26 is provided in the mixing silo 21 for uniformly mixing the powder in the mixing silo 21. A mixing driver 27 is provided at the top axis of the mixing silo 21. The mixing driver 27 is a reduction motor connected to the plurality of paddles in the mixing silo 21 to provide rotational power therefor.

[0039] In the utility model, a dust collecting port 24 is arranged on the top of the mixing silo 21, a dust collecting hose is connected to the dust collecting port 24, and a control valve is arranged at the dust collecting port 24 to adjust the opening. The residual powder in the equipment can be recovered through the dust collecting port 24, so that the samples of each batch will not be mixed and the batch pollution of the pipeline will not be caused.

[0040] In addition, a silo feed port 25 is provided on the top of the mixing silo 21, and a feed hose is connected to the silo feed port 25. By designing the hose connection between the conveying device and the mixing weighing device and other external devices, it is ensured that the entire weight is supported by the weighing assembly, which is also conducive to improving the weighing accuracy.

[0041] like Figure 1 As shown, the sampling device also includes a rotary vibrating screen 5, which has a rotary vibration device and a screen mesh inside, and can screen and filter the powder material. The screen mesh is a square hole screen with a mesh size of 0.9 mm. The rotary vibrating screen 5 is arranged on the equipment frame 1, and the rotary vibrating screen 5 includes a slag discharge port 51 and a rotary vibrating screen discharge port 52, and the rotary vibrating screen discharge port 52 is connected to the feed hose. The slag discharge port 51 discharges the powder material that does not meet the requirements and discharges it into the recovery bin.

[0042] The sampling device also includes a quantitative sampling unit 6, which is connected to the top of the rotary vibrating screen 5 and is directly connected to the powder silo 7. The quantitative sampling unit 6 can use a quantitative feeding device, which mainly controls the reduction motor to drive the spiral structure or the cylinder piston to drive the material head, performs speed control or volume control, and feeds back to the entire process system. First, a rough measurement is achieved through the quantitative sampling unit to reduce the waste of powder, and then a secondary precise measurement is performed using the mixing weighing device 2 and the conveying device 3. The entire sampling device has a high measurement accuracy.

[0043] The sampling device of the utility model adopts a method of on-site nearby installation, the device has a compact structure and a small size, can be flexibly installed and disassembled, and the installation and maintenance costs of the sampling device are lower.

[0044] Preferably, the conveying device 3 is configured as a quantitative screw conveying device, which includes a feeding screw 31, the upper portion of which is connected to the silo discharge port 23, a screw driver 32 is provided at one end of the feeding screw 31, and a filling port 33 is provided at the other end. The screw driver 32 can use a reduction motor, and the filling port 33 is used to connect with the filling mechanism 4 to load the material into the sample container.

[0045] The sampling device of the utility model also includes a control system, which is connected to the screw driver 32 and the weighing component 22 by signal. The control system controls the speed and number of turns of the feeding screw through a preset program, and stops the screw from rotating when the weight loss feedback from the weighing component 22 reaches a set value.

[0046] Combination Figure 1 and Figure 3 As shown, the sampling device further includes a filling mechanism 4, which is disposed on the device frame 1, and is located below the filling port 33, and the filling mechanism 4 is connected to the filling port 33 via a hose.

[0047] Specifically, the filling mechanism 4 includes a cylinder 46, a pull rope 44, a rigid telescopic joint 48 and a lower hopper 49. The cylinder 46 includes a sensor connected to the signal of the weighing assembly 22. The cylinder 46 drives the pull rope 44 to drive the rigid telescopic joint 48 to extend and retract in the vertical direction. The lower hopper 49 is connected below the rigid telescopic joint 48. Furthermore, the filling mechanism 4 also includes a dust collection pipe and a dust collection valve 41, a hose interface 42, a tensioning weight 43, a pull plate 45, and a follower 47. The hose interface 42 is connected to the filling port 33, and the cylinder 46 pulls multiple pull ropes 44 through the pull plate 45. The follower 47 is located on both sides of the pull plate 45 and can move along the track. The tensioning weight 43 is used to keep the pull rope 44 from bending, and the pull rope 44 is connected to the rigid telescopic joint 48 through a pulley. The lower hopper 49 can be docked with the sample container port.

[0048] Preferably, the control system and the quantitative sampling unit 6, the vibrating screen 5, the stirring driver 27, the cylinder 46 and other devices and components can also be connected by signals to automatically control various parts of the sampling device, so that the sampling device has a high degree of automation.

[0049] In summary, the preferred specific implementation process of the sampling device of this embodiment is as follows: the control system controls the quantitative sampling unit 6 to perform automatic sampling at a fixed time. When a certain number of circles or time is reached, the control system controls the rotary vibrating screen 5 to start vibrating screening, and qualified powder enters the mixing silo 21. When the weight feedback from the weighing component 22 reaches the set value, the quantitative sampling unit 6 and the rotary vibrating screen 5 are controlled to stop working, and the powder stops entering the mixing silo 21, and the mixing silo 21 starts to stir and mix the materials. While waiting for the sample container to be transported to the specified location, the cylinder 46 of the filling mechanism 4 is controlled to extend so that the lower hopper 49 docks with the sample container port, and the dust collection valve 41 of the filling mechanism 4 is opened for dust collection. The feeding screw 31 of the quantitative screw conveying device starts to convey materials, and the weighing component 22 performs weightlessness feedback. When a certain value is reached, the feeding screw 31 is controlled to stop conveying, and the cylinder 46 retracts.

[0050] In summary, from the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0051] 1. The sampling equipment of the utility model is designed so that the weight of the entire conveying device and the mixing weighing device is supported by the weighing assembly on the equipment frame. The above devices are weighed together with the powder. While stirring, mixing and conveying are performed at the same time, the weighing accuracy of the weighing assembly is guaranteed, and its accuracy can reach ±0.5%, thereby being able to provide material samples with accurate weight.

[0052] 2. The sampling equipment of the utility model designs the layout of the weighing components, so that the overall support for the conveying device and the mixed weighing device is more stable and the weighing is more accurate. By further designing the conveying device and the mixed weighing device to be connected to other external devices with a hose, it is ensured that the entire weight is supported by the weighing components, which is also conducive to improving the weighing accuracy.

[0053] 3. The sampling equipment of the utility model can recycle the residual powder in the equipment by designing the dust collecting port and the control valve, so that the samples of each batch will not be mixed and will not cause batch contamination of the pipeline.

[0054] 4. The sampling device of the utility model can realize accurate control of the feeding rate by designing a quantitative spiral conveying device and a control system, which is conducive to providing material samples of accurate weight and makes the sampling device more automated.

[0055] 5. The sampling device of the utility model realizes rough measurement by adopting quantitative sampling units, reduces the waste of powder, and adopts the method of on-site installation. The device has a compact structure and small size, can be flexibly installed and disassembled, and the cost of installation and maintenance of the sampling device is lower.

[0056] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A powder sampling device, characterized in that: include: An equipment frame (1), the equipment frame (1) serving as a mounting base for the sampling device; a mixing weighing device (2), the mixing weighing device (2) being arranged on the equipment frame (1), the mixing weighing device (2) comprising a mixing silo (21) and one or more weighing components (22), the weighing components (22) being arranged at the connection between the mixing weighing device (2) and the equipment frame (1), the weighing components (22) being connected to the outer side of the mixing silo (21), the mixing silo (21) comprising a silo discharge port (23), the silo discharge port (23) being located at the lower part of the mixing silo (21); A conveying device (3), wherein the conveying device (3) is located below the mixing silo (21), the conveying device (3) is connected to the silo discharge port (23), and the conveying device (3) and the mixing weighing device (2) are integrally supported on the equipment frame (1) by the weighing assembly (22).

2. The sampling device according to claim 1, characterized in that: The plurality of weighing components (22) are evenly distributed on the circumferential outer side of the stirring silo (21), and the weighing components (22) are provided with weighing sensors.

3. The sampling device according to claim 2, characterized in that: The number of the weighing components (22) is set to three, the outer wall of the stirring silo (21) has a conical structure, and the three weighing components (22) are connected to the outer wall of the stirring silo (21).

4. The sampling device according to claim 1, characterized in that: A dust collecting port (24) is provided at the top of the mixing silo (21), a dust collecting hose is connected to the dust collecting port (24), and a control valve is provided at the dust collecting port (24).

5. The sampling device according to claim 1, characterized in that: A silo feed port (25) is provided at the top of the mixing silo (21), and a feed hose is connected to the silo feed port (25).

6. The sampling device according to claim 5, characterized in that: The sampling device also includes a rotary vibrating screen (5), wherein the rotary vibrating screen (5) has a rotary vibration device and a screen, and the rotary vibrating screen (5) is arranged on the device frame (1). The rotary vibrating screen (5) includes a slag discharge port (51) and a rotary vibrating screen discharge port (52), and the rotary vibrating screen discharge port (52) is connected to the feed hose.

7. The sampling device according to claim 6, characterized in that: The sampling device further comprises a quantitative sampling unit (6), wherein the quantitative sampling unit (6) is connected above the rotary vibrating screen (5), and the quantitative sampling unit (6) is connected to a powder silo (7).

8. The sampling device according to any one of claims 1 to 7, characterized in that: The conveying device (3) is configured as a quantitative screw conveying device, and the quantitative screw conveying device comprises a feeding screw (31), the upper portion of the feeding screw (31) is connected to the silo discharge port (23), one end of the feeding screw (31) is provided with a screw driver (32), and the other end is provided with a filling port (33).

9. The sampling device according to claim 8, characterized in that: The sampling device also includes a control system connected to the screw drive (32) and the weighing assembly (22).

10. The sampling device according to claim 8, characterized in that: The sampling device further comprises a filling mechanism (4), wherein the filling mechanism (4) is arranged on the device frame (1), the filling mechanism (4) is located below the filling port (33), and the filling mechanism (4) is connected to the filling port (33) via a hose.

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