Weighing and sample adding device

Abstract

The invention discloses a weighing and sample adding device, which comprises a weighing and sample adding device for adding a solid powder sample into a crucible of a sample placing disc, and the weighing and sample adding device comprises a rack, a sample adding mechanism and an adjusting mechanism, the sample adding mechanism is fixedly arranged on the rack, a sample adding opening is formed in the bottom end of the sample adding mechanism to add samples into a crucible of the sample placing disc, the adjusting mechanism is connected with the rack, and the adjusting mechanism is movably arranged on the sample adding mechanism to adjust the sample adding speed and the sample adding amount of the sample adding mechanism. The weighing and sample adding device is movably arranged on the sample adding mechanism through the adjusting mechanism, so that the weighing and sample adding device can change the speed of a solid powder sample passing through the sample adding port through the movement of the adjusting mechanism, and the sample adding speed of the weighing and sample adding device can be adjusted according to actual experiment requirements; the conditions of excessive sample adding and overweight weighing caused by uncontrollable sample adding speed of a traditional weighing device are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of sample addition, and more specifically to a weighing and sample addition device. Background Art

[0002] At present, before analyzing coal sample ash, volatile matter, sulfur content and other coal quality indicators, it is necessary to quantitatively weigh the coal sample to be analyzed. At present, for laboratory weighing, the laboratory technician usually places an empty crucible on a precision balance, then uses a tool such as a spoon to take the sample out of the sample bottle and slowly places it in the empty crucible. In general, it is necessary to measure the calorific value, moisture content, ash content, carbon content, sulfur content, hydrogen content, sulfur content and other indicators of the sample. Due to the large number of samples weighed every day, the laboratory technician's work intensity will be very high. The sample is easy to spill during the process of taking out the sample, and the manual operation of sample weighing is inefficient. Human factors in the weighing process may lead to unstable weighing results.

[0003] In the traditional sample weighing and adding process, a balance with a weighing rod is generally used to weigh the sample, such as Figure 2 As shown, the crucible is placed on a circular sample placing plate that can be raised and lowered and rotated. The driving mechanism makes the circular sample placing plate rotate one grid each time, and the sample placing hole is just above the sample weighing rod on the balance. Then the sample placing plate is lowered to make the crucible fall on the sample weighing rod, so as to realize the automatic weighing of the sample. That is, after the crucible is placed, the lifting and rotating module can drive the sample placing plate to rotate, and the positioning encoder disk and the positioning switch at the bottom are used for positioning, so that the crucible on the sample placing plate is rotated to be directly above the sample weighing rod in turn, and the crucible is lowered to the sample weighing rod for weighing. However, this weighing method is very prone to excessive sample addition and overweight due to too fast sample addition speed during the weighing process, which often causes errors in weighing during the test and affects the accuracy of weighing.

[0004] Therefore, how to control the sample adding speed, avoid overweighing, and realize sample adding automation is an urgent problem to be solved. Summary of the invention

[0005] The object of the present invention is to provide a weighing and adding sample device. The weighing and adding sample device provided by the present invention can effectively control the adding sample speed, avoid weighing overweight, realize automatic adding sample, and improve the weighing accuracy.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A weighing and adding sample device, which is used to add solid powder samples into a crucible of a sample placing plate, and the weighing and adding sample device comprises: a frame, a sample adding mechanism and an adjustment mechanism;

[0008] The sample loading mechanism is fixedly arranged on the frame, a sample loading port is arranged at the bottom end of the sample loading mechanism for loading samples into the crucible of the sample placing plate, the adjustment mechanism is connected to the frame, and the adjustment mechanism is movably arranged on the sample loading mechanism to adjust the sample loading speed and sample loading amount of the sample loading mechanism.

[0009] Preferably, a driving assembly is provided on the frame, and an output end of the driving assembly is connected to the adjustment mechanism.

[0010] Preferably, the driving assembly comprises a telescopic rod and a driving motor; one end of the telescopic rod is connected to the driving motor, and the other end of the telescopic rod is connected to the adjusting mechanism.

[0011] Preferably, the adjustment mechanism comprises a movable screen plate and a box body;

[0012] The movable screen plate is fixedly connected to the box body, the side wall of the box body is connected to the telescopic rod, and a plurality of discharge holes are provided on the movable screen plate, and the plurality of discharge holes can be communicated with the sample adding port.

[0013] Preferably, the sample loading mechanism comprises a fixed sieve plate and a feeding cone;

[0014] The bottom plate of the fixed sieve plate is fixedly connected to the frame, one end of the fixed sieve plate extends toward a side away from the driving assembly, the fixed sieve plate is provided with the sample loading port, the discharge cone is arranged on the bottom surface of the fixed sieve plate and the discharge cone is communicated with the sample loading port.

[0015] Preferably, the discharge cone comprises a feed port and a discharge port, the feed port has the same diameter as the sample addition port and the feed port is connected to the sample addition port, and the discharge port has a smaller diameter than the feed port.

[0016] Preferably, at least 16 discharge holes are arranged on the movable screen plate, and all of the discharge holes can be communicated with the sample addition port.

[0017] Preferably, the connection angles between the side walls of the box body and the movable sieve plate are greater than 90° and the connection angles between the side walls of the box body and the movable sieve plate are the same.

[0018] The beneficial effects of the present invention are:

[0019] The weighing and adding device is movably arranged on the adding mechanism through the adjustment mechanism, so that the weighing and adding device can change the speed of the solid powder sample passing through the adding port by moving the adjustment mechanism, so that the adding speed of the weighing and adding device can be adjusted according to the actual experimental requirements, avoiding the situation of excessive adding and overweight weighing caused by the uncontrollable adding rate in the traditional weighing device, so that the weighing and adding device can realize accurate adding and weighing, which is convenient for users to control the adding rate and the adding weight, and improves the automation degree of adding. In addition, the weighing and adding device has a simple structure, which is convenient for users to produce, disassemble, and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a weighing and adding sample device of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a traditional weighing device in the prior art.

[0022] Description of reference numerals:

[0023] 1. Movable screen plate; 2. Unloading cone; 3. Fixed screen plate; 4. Driving assembly; 5. Frame. DETAILED DESCRIPTION

[0024] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without violating the connotation of the present invention, so the present invention is not limited to the specific implementation disclosed below.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] like Figure 1As shown, a weighing and adding device is used for adding solid powder samples into the crucible of the sample placing plate, and the weighing and adding device comprises: a frame 5, a adding mechanism and an adjusting mechanism; the adding mechanism is fixedly arranged on the frame 5, a adding port is arranged at the bottom end of the adding mechanism for adding samples into the crucible of the sample placing plate, the adjusting mechanism is connected to the frame 5, and the adjusting mechanism is movably arranged on the adding mechanism for adjusting the adding speed and amount of the adding mechanism.

[0028] In this embodiment, the adjustment mechanism is movably arranged on the sample adding mechanism, so that the weighing and adding device can change the speed of the solid powder sample passing through the sample adding port by moving the adjustment mechanism, so that the sample adding speed of the weighing and adding device can be adjusted according to the actual experimental requirements, avoiding the situation of excessive sample addition and overweight weighing caused by the uncontrollable sample addition rate in the traditional weighing device, so that the weighing and adding device can achieve accurate sample addition and weighing, which is convenient for users to control the sample addition rate and sample addition weight, and improves the degree of automation of sample addition. In addition, the weighing and adding device has a simple structure, which is convenient for users to produce, disassemble, assemble and maintain.

[0029] like Figure 1 As shown, a drive assembly 4 is provided on the frame 5, and the output end of the drive assembly 4 is connected to the adjustment mechanism. The drive assembly 4 includes a telescopic rod and a drive motor; one end of the telescopic rod is connected to the drive motor, and the other end of the telescopic rod is connected to the adjustment mechanism. In this embodiment, the reciprocating motion of the adjustment mechanism is controlled by the telescopic rod driven by the motor, thereby realizing the control of the sample amount passing through the sample addition port.

[0030] See also Figure 1 The adjustment mechanism includes a movable screen plate 1 and a box body; the movable screen plate 1 is fixedly connected to the box body, and the side wall of the box body is connected to the telescopic rod. The movable screen plate 1 is provided with a plurality of discharge holes, and the plurality of discharge holes can be connected to the sample addition port. The sample addition mechanism includes a fixed screen plate 3 and a discharge cone 2; the bottom plate of the fixed screen plate 3 is fixedly connected to the frame 5, and one end of the fixed screen plate 3 extends toward a side away from the driving assembly 4, and the fixed screen plate 3 is provided with a sample addition port, and the discharge cone 2 is arranged on the bottom surface of the fixed screen plate 3 and the discharge cone 2 is connected to the sample addition port.

[0031] In this embodiment, the movable sieve plate 1 is connected to the telescopic rod of the driving component 4, and the driving component 4 drives the movable sieve plate 1 to reciprocate on the fixed sieve plate 3, thereby controlling the connection and disconnection of the multiple discharge holes opened on the movable sieve plate 1 and the sample loading port opened on the fixed sieve plate 3, thereby changing the discharge amount and discharge rate of the sample loading port, thereby controlling the sample loading speed onto the weighing balance and realizing precise weighing.

[0032] In a preferred embodiment, the discharge cone 2 includes a feed port and a discharge port, the feed port and the sample port have the same diameter and are connected to each other, and the discharge port has a smaller diameter than the feed port. The movable screen plate 1 is provided with at least 16 discharge holes, and the discharge holes can be connected to the sample port. The connection angle between the side wall of the box body and the movable screen plate 1 is greater than 90° and the connection angle between the side wall of the box body and the movable screen plate 1 is the same.

[0033] In this embodiment, the discharge holes can be connected to the sample adding port, which enables the weighing and adding device to achieve rapid sample adding. When a large number of samples need to be weighed, the discharge holes are connected to the sample adding port by moving the movable screen plate 1, so that the weighing and adding device can quickly add a large number of samples; when only a small amount of samples need to be weighed, only part of the discharge holes are connected to the sample adding port by moving the movable screen plate 1, so that the sample adding rate of the weighing and adding device is greatly reduced, so that the sample adding weight of the weighing and adding device is reduced within a certain period of time to add samples according to experimental requirements. The setting mode in which the diameter of the discharge port is smaller than the diameter of the feed port and the connection angle between the side wall of the box body and the movable screen plate 1 is greater than 90° further makes the flow of samples smoother and avoids sample accumulation and blockage.

[0034] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A weighing and adding device, which is used to add solid powder samples into a crucible of a sample placing plate, characterized in that: The weighing and adding sample device comprises: a frame, a adding sample mechanism and an adjusting mechanism; The sample loading mechanism is fixedly arranged on the frame, a sample loading port is arranged at the bottom end of the sample loading mechanism for loading samples into the crucible of the sample placing plate, the adjustment mechanism is connected to the frame, and the adjustment mechanism is movably arranged on the sample loading mechanism to adjust the sample loading speed and sample loading amount of the sample loading mechanism.

2. The weighing and adding device according to claim 1, characterized in that: A driving assembly is arranged on the frame, and an output end of the driving assembly is connected to the adjusting mechanism.

3. The weighing and adding device according to claim 2, characterized in that: The driving assembly comprises a telescopic rod and a driving motor; one end of the telescopic rod is connected to the driving motor, and the other end of the telescopic rod is connected to the adjusting mechanism.

4. The weighing and adding device according to claim 3, characterized in that: The adjustment mechanism comprises a movable screen plate and a box body; The movable screen plate is fixedly connected to the box body, the side wall of the box body is connected to the telescopic rod, and a plurality of discharge holes are provided on the movable screen plate, and the plurality of discharge holes can be communicated with the sample adding port.

5. The weighing and adding device according to claim 4, characterized in that: The sample loading mechanism comprises a fixed sieve plate and a feeding cone; The bottom plate of the fixed sieve plate is fixedly connected to the frame, one end of the fixed sieve plate extends toward a side away from the driving assembly, the fixed sieve plate is provided with the sample loading port, the discharge cone is arranged on the bottom surface of the fixed sieve plate and the discharge cone is communicated with the sample loading port.

6. The weighing and adding device according to claim 5, characterized in that: The feed cone comprises a feed port and a feed port. The feed port has the same diameter as the sample adding port and the feed port is connected to the sample adding port. The feed port has a smaller diameter than the feed port.

7. The weighing and adding sample device according to claim 5, characterized in that: At least 16 discharge holes are arranged on the movable sieve plate, and all of the discharge holes can be communicated with the sample adding port.

8. The weighing and adding sample device according to claim 5, characterized in that: The connection angles between the side walls of the box body and the movable sieve plate are all greater than 90°, and the connection angles between the side walls of the box body and the movable sieve plate are all the same.

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