Automatic weighing device

Abstract

The utility model relates to the technical field of weighing equipment, and provides an automatic weighing device. A feeding tool and a weighing tool are coaxially arranged; the temporary storage tool is located between the weighing tool and the feeding tool and comprises a temporary storage platform and a lifting mechanism, a plurality of temporary storage holes are formed in the temporary storage platform in a circumferential array mode, and the temporary storage platform is suitable for rotating in the axial direction of the temporary storage platform; the lifting mechanism is suitable for driving the temporary storage platform to do lifting motion, so that the temporary storage platform is switched between a weighing state and a non-weighing state; in a non-weighing state, the temporary storage platform is far away from the weighing tool, and a material container is placed on the temporary storage hole; in the weighing state, the temporary storage platform is close to the weighing tool, the material containing container is separated from the temporary storage hole, the weighing tool supports the material containing container, and the material supply tool falls materials to the material containing container for weighing; the adsorption tool is located above the feeding tool and used for adsorbing samples left by the feeding tool. The coal sample weighing device does not need to be matched with index analysis of a coal sample to carry out multiple weighing actions, and the weighing efficiency is higher.

Description

Technical Field

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

[0002] In order to understand the quality and combustion characteristics of coal, physical and chemical methods are used to conduct chemical analysis and testing on coal samples, which generally include industrial analysis, elemental analysis, ash composition analysis, and determination of coal, coal powder and ash properties. A single coal sample often needs to be analyzed for multiple indicators, and each indicator requires at least two coal samples to be weighed separately for experiment. The weighing process has high repetitiveness and consumes a lot of time and effort.

[0003] To this end, the relevant technology adopts a mechanical structure to replace manual operation for sample weighing, that is, the crucible carrying the sample is transferred to the weighing station for weighing through a transfer mechanism. After the weighing is completed, the crucible containing the sample is transferred to the next station by a robot. This arrangement can not only save manpower, but also improve the weighing efficiency.

[0004] Although the above mechanical structure can save manpower and improve weighing efficiency by replacing manual operation for weighing, during the operation, each index of each coal sample needs to be transferred by the manipulator before the next coal sample can be weighed, which reduces the weighing efficiency of the entire weighing device. Utility Model Content

[0005] The utility model provides an automatic weighing device to solve the above technical defects in the prior art. During the weighing process, only the manipulator needs to place or transfer the material container once, and there is no need to perform multiple weighing actions in conjunction with the index analysis of the coal sample, so the weighing efficiency is higher.

[0006] The utility model provides an automatic weighing device, comprising:

[0007] Weighing tooling;

[0008] A feeding tool is arranged coaxially with the weighing tool;

[0009] A temporary storage tool is located between the weighing tool and the feeding tool. The temporary storage tool includes a temporary storage platform and a lifting mechanism. The temporary storage platform is provided with a plurality of temporary storage holes along a circumferential array. The temporary storage platform is suitable for rotating along its own axial direction. The lifting mechanism is suitable for driving the temporary storage platform to perform lifting and lowering movements so that the temporary storage platform can be switched between a weighing state and a non-weighing state. In the non-weighing state, the temporary storage platform is away from the weighing tool, and a material container is placed on the temporary storage hole. In the weighing state, the temporary storage platform is close to the weighing tool, and the material container is separated from the temporary storage hole. The weighing tool supports the material container, and the feeding tool drops material into the material container for weighing.

[0010] The adsorption tool is located above the feeding tool and is used for adsorbing the sample remaining in the feeding tool.

[0011] According to the automatic weighing device provided by the utility model, the adsorption tooling includes a dust hood, a dust pipe and a linear drive member;

[0012] The dust suction pipe is suitable for connecting to a negative pressure device, and the dust suction cover is respectively connected to the dust suction pipe and the linear drive member so as to be extended under the action of the linear drive member and covered on the feeding tooling.

[0013] According to the automatic weighing device provided by the utility model, the lifting mechanism includes:

[0014] Bearing body;

[0015] A lifting bracket, suitable for installing the temporary storage platform and the feeding tool, wherein the lifting bracket is provided with a track portion on a side facing the bearing body;

[0016] The driving assembly includes a driving component and a driven component, wherein the driven component is arranged at the driving end of the driving component, and the driven component is movably cooperated with the bearing body and the track part respectively; the driving component is suitable for driving the driven component to reciprocate along a straight line, so that the lifting bracket can be lifted and lowered, thereby driving the temporary storage platform to be lifted and lowered synchronously.

[0017] According to the automatic weighing device provided by the utility model, the track portion includes a first track surface and a second track surface connected to each other, and the distance between the first track surface and the bearing body is greater than the distance between the second track surface and the bearing body;

[0018] In the weighing state, the driven component abuts against the first track surface;

[0019] In the non-weighing state, the driven member abuts against the second track surface.

[0020] According to the automatic weighing device provided by the utility model, the driven component includes:

[0021] A supporting component connected to the driving component;

[0022] A rolling component is provided on the supporting component, and the rolling component and the track portion are in rolling cooperation, or the rolling component and the track portion and the bearing body are respectively in rolling cooperation.

[0023] According to the automatic weighing device provided by the utility model, the rolling component includes a first rolling component and a second rolling component, the first rolling component is arranged above the supporting component and rollingly cooperates with the lifting bracket; the second rolling component is rotatably arranged below the supporting component and rollingly cooperates with the bearing body.

[0024] According to the automatic weighing device provided by the utility model, the rolling component further includes a third rolling element, the third rolling element is arranged in a colinear manner with the second rolling element, and the third rolling element is in rolling cooperation with the bearing body;

[0025] Wherein, the connecting lines among the first rolling element, the second rolling element and the third rolling element form an isosceles triangle.

[0026] According to the automatic weighing device provided by the utility model, the lifting mechanism further includes a guide assembly, the guide assembly includes a guide rail and a slider, and the slider is slidably matched with the guide rail;

[0027] The guide rail is arranged on one of the lifting bracket and the carrying body, and the slider is arranged on the other of the lifting bracket and the carrying body.

[0028] According to the automatic weighing device provided by the utility model, the lifting bracket includes a first frame body and a second frame body connected to each other, the first frame body and the second frame body are staggered, the temporary storage platform is arranged on the first frame body, and the feeding tooling is arranged on the second frame body;

[0029] The guide rail or the slider is arranged on both sides of the first frame, and the track portion is arranged on one side of the first frame facing the bearing body.

[0030] The automatic weighing device provided by the utility model further includes a covering tool, which is arranged downstream of the feeding tool and is used to cover the material container after weighing to prevent the sample in the material container from volatilizing.

[0031] According to the automatic weighing device provided by the utility model, the feeding tool comprises:

[0032] A material bin, provided with a material cavity and a material drop hole communicated with the material cavity;

[0033] A support assembly is sleeved on the outer peripheral surface of the silo and movably cooperates with the silo;

[0034] A vibration component, connected to the silo, and used to drive the silo to vibrate and drop materials;

[0035] A limiting component can be movably inserted into the blanking hole and is suitable for switching between a first position and a second position; in the first position, the limiting component is in contact with the blanking hole to block the blanking hole; in the second position, the limiting component is away from the blanking hole, and a blanking gap is formed between the limiting component and the inner wall of the blanking hole.

[0036] According to the automatic weighing device provided by the utility model, the weighing tool includes a balance arranged on a base, the balance is provided with a balance support, the balance support is connected with a weighing beam, the weighing beam is coaxially arranged with the temporary storage hole, and is used to support the material container.

[0037] The automatic weighing device provided by the utility model is provided with a temporary storage tool, a weighing tool, a feeding tool and an adsorption tool, and the temporary storage tool is provided to include a temporary storage platform and a lifting mechanism, so that the temporary storage platform can not only rotate, but also can be lifted and lowered under the action of the lifting mechanism. When the temporary storage platform is raised to a non-weighing state driven by the lifting mechanism, the manipulator can place or transfer all the material containers (such as crucibles) that need to be weighed to multiple temporary storage holes on the temporary storage platform at one time, without the need to perform multiple weighing actions in conjunction with the index analysis of the coal sample, and the weighing efficiency is higher; when the temporary storage platform is driven by the lifting mechanism to descend to the weighing state, the material container is separated from the temporary storage hole of the temporary storage platform, the weighing tool supports the material container, and the feeding tool feeds the material container to weigh. In addition, the automatic weighing device has a high degree of integration and expansibility, and multiple devices can be used in series to form an automated analysis device.

[0038] When all indicators of a coal sample are weighed, the sample remaining in the feeding tooling can be adsorbed and removed through the adsorption tooling to prevent the coal sample weighed last time from mixing with the coal sample to be weighed next time, thereby affecting the measurement accuracy of the next coal sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 It is a structural schematic diagram of an automatic weighing device provided by an embodiment of the utility model from one perspective;

[0041] Figure 2 It is a structural schematic diagram of the automatic weighing device provided by the embodiment of the utility model from another perspective;

[0042] Figure 3 yes Figure 2 A top view of the automatic weighing device shown;

[0043] Figure 4 yes Figure 3 Sectional view along line AA;

[0044] Figure 5 yes Figure 4 Enlarged view of middle part B;

[0045] Figure 6 It is a schematic structural diagram of a limit axis in a feeding tool of an automatic weighing device provided in an embodiment of the utility model;

[0046] Figure 7 It is a schematic structural diagram of a limit axis in a feeding tool of an automatic weighing device provided in an embodiment of the utility model;

[0047] Figure 8 It is a structural schematic diagram of the lifting mechanism in the automatic weighing device provided in the embodiment of the utility model;

[0048] Fig. 9 It is a front view of the lifting mechanism in the automatic weighing device provided in the embodiment of the utility model;

[0049] Fig.10 It is a cross-sectional view of a lifting mechanism in an automatic weighing device provided in an embodiment of the utility model;

[0050] Fig.11 It is a structural schematic diagram of a lifting bracket in an automatic weighing device provided in an embodiment of the utility model (including a feeding tool);

[0051] Fig.12 It is a structural schematic diagram of a temporary storage platform in an automatic weighing device provided in an embodiment of the utility model.

[0052] Reference numerals:

[0053] 100, temporary storage tooling; 110, temporary storage platform; 111, temporary storage hole; 112, platform body; 113, rotary drive component; 120, lifting mechanism; 121, bearing body; 1211, guide groove; 122, lifting bracket; 1221, track portion; 1221-1, first track surface; 1221-2, second track surface; 1222, first frame; 1223, second frame; 123, driving assembly; 1231, driving component; 1232, driven component; 1232-1, first support member; 1232-2, second support member; 1232-3, first rolling member; 1232-4, second rolling member; 1232-5, third rolling member; 124, guiding assembly; 1241, guide rail; 1242, slider;

[0054] 200, feeding tool; 210, silo; 211, blanking hole; 212, guide hole; 220, support assembly; 221, guide sleeve; 222, fixing piece; 223, retaining spring; 224, connecting ring; 230, vibration assembly; 231, connecting plate; 232, vibrator; 233, buffer silencer ring; 234, connecting part; 235, U-shaped holder; 240, limiting assembly; 241, limiting shaft; 242, stirring limiting rod; 243, limiting section; 244, blanking section; 245, blocking surface; 246, guiding surface; 247, first limiting part; 248, stirring part;

[0055] 300, weighing tool; 310, base; 320, balance; 330, balance support; 340, weighing beam; 350, protective cover; 360, baffle;

[0056] 400, adsorption tool; 410, dust cover; 420, dust pipe; 430, linear drive member; 440, switching seat; 450, main dust pipe;

[0057] 500. Covering tooling; 600. Material container. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0059] In traditional laboratories, the coal sample powder to be analyzed and tested needs to be weighed manually. The weight of a single coal sample to be analyzed varies from 0.05g, 0.2g to 1g, depending on different analysis indicators and national standards, and the deviation is generally within 10%. The weighing operation requires precision and high repeatability, is tedious and requires high manual proficiency, and requires a lot of time and effort. Although a mechanical structure is used for weighing, the weighing efficiency is still low. To this end, an embodiment of the utility model provides an automatic weighing device.

[0060] Figure 1 It is a structural schematic diagram of an automatic weighing device provided by an embodiment of the utility model from one perspective; Figure 2 It is a structural schematic diagram of the automatic weighing device provided by the embodiment of the utility model from another perspective; Figure 3 yes Figure 2 A top view of the automatic weighing device shown; Figure 4 yes Figure 3 Sectional view along line AA; Figure 5yes Figure 4 Enlarged view of part B in the middle.

[0061] See also Figures 1 to 5 An embodiment of the utility model provides an automatic weighing device, which includes a temporary storage tool 100, a weighing tool 300, a feeding tool 200 and an adsorption tool 400.

[0062] The temporary storage tool 100 includes a temporary storage platform 110 and a lifting mechanism 120. The temporary storage platform 110 is suitable for rotating along its own axial direction. The temporary storage platform 110 is provided with a plurality of temporary storage holes 111 along a circumferential array. The temporary storage holes 111 are used to temporarily store material containers for holding samples required for coal sample index analysis. The number of the temporary storage holes 111 can be deleted according to actual use requirements. When the coal sample indexes to be analyzed increase, the number of temporary storage holes 111 increases accordingly. When the coal sample indexes to be analyzed decrease, the number of temporary storage holes 111 decreases accordingly. The lifting mechanism 120 can drive the temporary storage platform 110 to perform lifting and lowering movements, so that the temporary storage platform 110 switches between a raised non-weighing state and a dropped weighing state.

[0063] The feeding tool 200 is located above the temporary storage platform 110, and is used to supply the sample to be weighed to the material container 600 described below. The weighing tool 300 is located below the temporary storage platform 110, and the weighing tool 300 and the feeding tool 200 are coaxially arranged, and the weighing tool 300 is used to weigh the weight of the sample in the material container 600. The adsorption tool 400 is located above the feeding tool 200, and is used to adsorb the sample remaining in the feeding tool 200 to avoid sample contamination and affect the measurement accuracy.

[0064] When the lifting mechanism 120 drives the temporary storage platform 110 to rise to the non-weighing state, the temporary storage platform 110 is away from the weighing tool 300, and the weighing tool 300 will not affect and interfere with the material container 600 placed on the temporary storage platform 110. At this time, the temporary storage platform 110 can rotate freely, and the manipulator can place the material container 600 in the temporary storage hole 111 in sequence. When the lifting mechanism 120 drives the temporary storage platform 110 to descend to the weighing state, the temporary storage platform 110 is close to the weighing tool 300, and the weighing tool 300 supports the material container 600 to make the material container 600 separate from the temporary storage platform 110. At the same time, the feeding tool 200 feeds the material container 600 to achieve the purpose of weighing.

[0065] It can be understood that the automatic weighing device provided by the embodiment of the utility model is provided with a temporary storage tool 100, a weighing tool 300, a feeding tool 200 and an adsorption tool 400, and the temporary storage tool 100 is provided to include a temporary storage platform 110 and a lifting mechanism 120, and the temporary storage platform 110 can not only rotate, but also can be lifted and lowered under the action of the lifting mechanism 120. When the temporary storage platform 110 is raised to a non-weighing state driven by the lifting mechanism 120, the manipulator can place or transfer all the material containers 600 (such as crucibles) that need to be weighed to the multiple temporary storage holes 111 on the temporary storage platform 110 at one time; when the temporary storage platform 110 is driven by the lifting mechanism 120 to descend to the weighing state, the material container 600 is separated from the temporary storage platform 110, the material container 600 is supported by the weighing tool 300, and the feeding tool 200 feeds the material to the material container 600 for weighing. During the weighing process, the robot only needs to place or transfer the material container 600 (such as a crucible) once, and there is no need to perform multiple weighing actions in conjunction with the index analysis of the coal sample. The weighing efficiency is higher, and the automatic weighing device is highly integrated and expandable, and multiple devices can be used in series to form an automated analysis equipment.

[0066] When all indicators of a coal sample are weighed, the sample remaining in the feeding fixture 200 can be adsorbed and removed by the adsorption fixture 400 to prevent the coal sample weighed last time from mixing with the coal sample to be weighed next time, thereby preventing the measurement accuracy of the next coal sample from being affected.

[0067] Continue reading Figure 1 and Figure 2 In some embodiments of the present invention, the adsorption tooling 400 includes a dust cover 410 , a dust pipe 420 , a linear drive member 430 and a switching seat 440 .

[0068] Among them, the linear driving member 430 is installed on the top of the switching seat 440, the dust hood 410 is connected to the driving end of the linear driving member 430, and the dust hood 410 is connected to the dust pipe 420, the dust pipe 420 is connected to the main dust pipe 450 through the switching seat 440, the main dust pipe 450 can be connected to a strong negative pressure device (such as a vacuum cleaner), and the strong negative pressure formed by the negative pressure device can be supplied to the dust hood 410 through the main dust pipe 450 and the dust pipe 420.

[0069] When the adsorption tool 400 is in the dust suction and cleaning state, the linear drive member 430 pushes out the dust suction pipe 420 and the dust suction hood 410, so that the dust suction hood 410 completely covers the material bin 210 of the feeding tool 200. At this time, the dust suction pipe 420 is connected with the main dust suction pipe 450 through the switching seat 440, and the negative pressure device is started to supply negative pressure to the dust suction hood 410 through the main dust suction pipe 450 and the dust suction pipe 420 to adsorb the residual sample in the material bin 210 of the feeding tool 200 to ensure that the next coal sample is not contaminated.

[0070] When the suction tool 400 is in the dust suction and cleaning closed state, the linear drive member 430 retracts the dust suction pipe 420 and the dust suction hood 410, so that the dust suction hood 410 is completely separated from the material bin 210 of the feeding tool 200. At this time, the dust suction pipe 420 is closed by the switching seat 440, the dust suction pipe 420 is disconnected from the main dust suction pipe 450, and the negative pressure device is turned off.

[0071] It should be noted that the shape of the dust hood 410 can be the same as the shape of the silo 210 of the feeding tool 200, and a sealing ring can be set at the inlet of the silo 210. When the dust hood 410 is set at the inlet of the silo 210, the dust hood 410 abuts against the sealing ring to form a sealed negative pressure space inside the silo 210. When the negative pressure enters the material cavity through the inlet of the silo 210, the negative pressure forms a strong cyclonic vortex that sweeps the inner wall of the silo 210 and takes away the residual sample in the silo 210, so that the sample enters the main suction pipe 450 along with the dust pipe 420 and is discharged.

[0072] It should also be noted that the connection and disconnection between the dust suction pipe 420 and the main dust suction pipe 450 can be achieved by switching the switch seat 440. The dust suction pipe 420 and the main dust suction pipe 450 can also be connected and disconnected by a solenoid valve arranged on the main dust suction pipe 450.

[0073] Continue reading Figure 4 and Figure 5 In some embodiments of the present invention, the weighing tool 300 includes a balance 320 installed on a base 310 , a balance support 330 is provided on the balance 320 , a weighing beam 340 is fixed on the balance support 330 , and the weighing beam 340 is coaxially arranged with the temporary storage hole 111 .

[0074] When the lifting mechanism 120 drives the temporary storage platform 110 to descend to the weighing state, the temporary storage platform 110 approaches the weighing beam 340, and the weighing beam 340 supports the material container 600 to make the material container 600 separate from the temporary storage platform 110. At the same time, the feeding tool 200 starts to feed the material container 600, and the balance 320 weighs the weight of the sample in the material container 600.

[0075] Furthermore, in order to prevent the airflow from affecting the balance of the scale beam 340, a protective cover 350 is provided on the outside of the scale beam 340. The protective cover 350 may be a cylindrical structure, which is sleeved on the outside of the scale beam 340 to block the airflow or dust. The shape of the protective cover 350 is only an example and is not specifically limited. The protective cover 350 may also be rectangular or prism-shaped, etc. The specific shape setting is determined according to actual use requirements.

[0076] In addition, a baffle 360 ​​may be provided on the inner wall of the protective cover 350 to prevent the sample or dust from entering the balance 320 from the position where the scale bar 340 is located, so as to affect the measurement accuracy of the balance 320. The baffle 360 ​​may be integrally formed with the protective cover 350, or may be separately formed. When the baffle 360 ​​and the protective cover 350 are integrally formed, it is equivalent to that one end of the protective cover 350 is open and the other end is closed, and the baffle 360 ​​is formed at the closed end, and a through hole is provided on the baffle 360 ​​for the scale bar 340 to pass through. When the baffle 360 ​​and the protective cover 350 are separately formed, the baffle 360 ​​may be clamped and set on the inner wall of the protective cover 350.

[0077] Continue reading Figure 4 and Figure 5 In some embodiments of the present invention, the feeding tool 200 includes a silo 210 , a supporting assembly 220 , a vibrating assembly 230 and a limiting assembly 240 .

[0078] The silo 210 is funnel-shaped with a larger top and a smaller bottom. The interior of the silo 210 is hollow to form a material cavity. A drop hole 211 connected to the material cavity is provided at the bottom of the silo 210. The central axis of the drop hole 211 is colinear with the central axis of the silo 210. When the drop hole 211 is opened, the sample powder in the material cavity can automatically fall into the drop hole 211 to realize automatic drop.

[0079] The support assembly 220 is sleeved on the outer peripheral surface of the silo 210 and is movably matched with the silo 210 in the up-down direction. The vibration assembly 230 is connected to the silo 210 and is used to drive the silo 210 to vibrate in the up-down direction.

[0080] The limiting component 240 can be movably inserted into the drop hole 211 and can vibrate between a first position and a second position, the first position being the lowest position of the limiting component 240 during the up and down vibration process, and the second position being the highest position of the limiting component 240 during the up and down vibration process; when the limiting component 240 is located at the first position, the limiting component 240 is fitted with the drop hole 211 to block the drop hole 211; when the limiting component 240 is located at the second position, the limiting component 240 is away from the drop hole 211, and the sample powder flows out through the gap between the limiting component 240 and the inner wall of the drop hole 211.

[0081] The feeding tool 200 provided in the embodiment of the utility model drives the material bin 210, the limiting component 240 and the sample powder in the material bin 210 to vibrate in the up and down directions through the vibration component 230, so that the sample powder falls downward through the gap between the limiting component 240 and the inner wall of the drop hole 211, completing the drop of the sample powder. It has the advantages of simple structure, precise control, convenient maintenance and low production cost, and can be used for the drop of various medium powders.

[0082] Figure 6 It is a structural schematic diagram of the limiting shaft 241 in the feeding tool 200 of the automatic weighing device provided in an embodiment of the utility model.

[0083] Continue reading Figure 4 and Figure 5 , and also see Figure 6 In some embodiments of the utility model, the limiting component 240 includes a limiting shaft 241, which is a rod-shaped structure and is vertically arranged in the blanking hole 211. The limiting shaft 241 and the blanking hole 211 are coaxially arranged. The limiting shaft 241 can be movably inserted in the blanking hole 211 and can vibrate between a first position and a second position.

[0084] Among them, the limiting shaft 241 includes a limiting section 243 and a blanking section 244. The limiting section 243 can be movably inserted in the blanking hole 211. The limiting section 243 is connected to the upper end of the blanking section 244. The cross-sectional area of ​​the blanking section 244 is smaller than the cross-sectional area of ​​the blanking hole 211, and the cross-sectional area of ​​the limiting section 243 is greater than or equal to the cross-sectional area of ​​the blanking hole 211.

[0085] When the limiting shaft 241 is located at the first position, the limiting section 243 fits against the blanking hole 211 to block the blanking hole 211; when the limiting shaft 241 is located at the second position, the limiting section 243 is away from the blanking hole 211, and the sample powder flows out through the gap between the blanking section 244 and the inner wall of the blanking hole 211.

[0086] It should be noted that the limiting section 243 and the blanking section 244 are integrally formed, the cross section of the limiting section 243 is circular, and the cross section of the blanking section 244 is rectangular or elliptical. When the vibration assembly 230 drives the silo 210 to vibrate in the up and down directions, the limiting section 243 vibrates up and down in the blanking hole 211, so that the limiting shaft 241 vibrates between the first position and the second position.

[0087] Continuing to refer to the figure, in some embodiments of the present invention, a horizontally arranged blocking surface 245 is formed at the connection between the limiting section 243 and the blanking section 244, and two blocking surfaces 245 are symmetrically arranged. A material guide surface 246 is also formed on both sides of the blanking section 244, and the material guide surface 246 is a vertically arranged plane, and the two material guide surfaces 246 are symmetrically arranged, and the material guide surface 246 is connected to the blocking surface 245.

[0088] When the limiting shaft 241 is located at the first position, the blocking surface 245 is in contact with the edge of the blanking hole 211 to block the blanking hole 211. When the limiting shaft 241 is located at the second position, the blocking surface 245 is away from the edge of the blanking hole 211 and a gap is formed between the guide surface 246 and the side wall of the blanking hole 211 for the material to flow out.

[0089] Correspondingly, a guide hole 212 is also provided at the bottom of the silo 210. The guide hole 212 is located below the blanking hole 211. The guide hole 212 is connected to the blanking hole 211. The guide hole 212 and the blanking hole 211 are both circular holes. The inner diameter of the guide hole 212 is larger than the inner diameter of the blanking hole 211. The guide hole 212 and the blanking hole 211 are coaxially arranged.

[0090] Continue reading Figure 6 In some embodiments of the present invention, a first limiting portion 247 is provided at the lower end of the blanking section 244. The first limiting portion 247 is in a strip-shaped structure and is integrally formed with the blanking section 244. The first limiting portion 247 is located in the guide hole 212, and the cross-sectional area of ​​the first limiting portion 247 is greater than the cross-sectional area of ​​the blanking hole 211. Since the cross-sectional area of ​​the first limiting portion 247 is greater than the cross-sectional area of ​​the blanking hole 211, when the limiting shaft 241 abuts against the lower edge of the blanking hole 211, the first limiting portion 247 limits the limiting shaft 241, preventing the limiting shaft 241 from continuing to move upward.

[0091] Furthermore, the first limiting portion 247 is arranged horizontally, and the end surfaces at both ends of the first limiting portion 247 are arranged as arc surfaces. During the up and down vibration process of the limiting shaft 241, the arc surfaces at both ends of the first limiting portion 247 slide and cooperate with the inner wall of the guide hole 212 in the up and down direction, which can guide the limiting shaft 241, ensure that the limiting shaft 241 is at the center position of the blanking hole 211, and make the limiting shaft 241 in a vertical state during the up and down vibration process.

[0092] It should be noted that, in order to facilitate installation and disassembly, the first limiting portion 247 can also be detachably connected to the blanking section 244. Specifically, the first limiting portion 247 and the blanking section 244 are connected by pins or the first limiting portion 247 and the blanking section 244 are connected by threads.

[0093] Figure 7 It is a structural schematic diagram of the limiting shaft 241 in the feeding tool 200 of the automatic weighing device provided in an embodiment of the utility model.

[0094] Continue reading Figure 4 and Figure 5 , and also see Figure 6 In some embodiments of the present invention, the limiting component 240 further includes a stirring limiting rod 242 , which is vertically arranged, and the lower end of the stirring limiting rod 242 is connected to the limiting section 243 .

[0095] Specifically, a plug hole is provided at the lower end of the stirring limit rod 242, and a plug portion is provided at the upper end of the limit shaft 241, and the plug portion is inserted into the plug hole, and the plug portion and the plug hole are interference fit, thereby realizing the fixed connection between the stirring limit rod 242 and the limit shaft 241. Alternatively, a plug portion is provided at the lower end of the stirring limit rod 242, and a plug hole is provided at the upper end of the limit shaft 241, and the stirring limit rod 242 and the limit shaft 241 can also be connected by plugging the plug portion and the plug hole. Of course, the connection method between the stirring limit rod 242 and the limit shaft 241 is not limited to this, and the stirring limit rod 242 and the limit shaft 241 can also be connected by integral molding, welding or threaded connection.

[0096] A plurality of stirring portions 248 are arranged at intervals on the outer circumference of the lower end of the stirring limiting rod 242; the stirring portions 248 are in a sheet-like structure, and the size of each stirring portion 248 is equal. Of course, the size and shape of each stirring portion 248 can be different. The stirring portions 248 are arranged horizontally, and the distance between two adjacent stirring portions 248 is equal.

[0097] When the limiting shaft 241 is in the first position, the stirring part 248 abuts against the inner wall of the silo 210. When the limiting shaft 241 vibrates up and down, the stirring part 248 vibrates up and down together with the limiting shaft 241, thereby stirring the sample powder to ensure that the coal sample is uniform and not prone to accumulation, and that there is no residue after cleaning so as not to contaminate the next sample.

[0098] It should also be noted that a second limiting portion is provided in the middle of the limiting section 243. The second limiting portion is annular and is integrally formed with the limiting section 243. When the stirring limit rod 242 is installed in place, the lower end of the stirring limit rod 242 abuts against the second limiting portion, and the second limiting portion serves to limit the stirring limit rod 242.

[0099] It should be noted that the specific structural form of the second limit portion is not limited to a ring, and can also be a limit block, a limit rod or other structural forms. The connection method of the second limit portion and the limit section 243 is not limited to integral molding, and can also be welding, plugging or other connection methods.

[0100] Continue reading Figure 4 and Figure 5In some embodiments of the utility model, the support assembly 220 includes a guide sleeve 221 and a fixing member 222. The guide sleeve 221 is in a circular shape. The guide sleeve 221 is sleeved on the outer peripheral surface of the silo 210 and movably cooperates with the silo 210 in the up-down direction. Specifically, during the vibration of the silo 210 in the up-down direction, the guide sleeve 221 and the silo 210 slide and cooperate in the up-down direction. By adopting the sliding cooperation between the guide sleeve 221 and the silo 210 in the up-down direction, the silo 210 can only move within a certain range in the axial direction of the guide sleeve 221 (i.e., the up-down direction) during vibration, so that the falling materials fall within a certain range and will not be scattered everywhere.

[0101] The fixing member 222 is connected to the guide sleeve 221, and is used to fix the guide sleeve 221. In this embodiment, the fixing member 222 is a plate-like structure, and the fixing member 222 is provided with a circular hole, and the fixing member 222 is sleeved on the outer periphery of the guide sleeve 221. The fixing member 222 is connected to a base or other equipment to fix the feeding tool 200.

[0102] Furthermore, a connecting ring 224 is provided on the outer circumferential surface of the guide sleeve 221. The connecting ring 224 extends along the circumferential direction of the guide sleeve 221. The connecting ring 224 is horizontally arranged and is located above the fixing member 222. The connecting ring 224 is provided with a through hole. The connecting ring 224 is connected to the fixing member 222 via a bolt in the through hole. Of course, the connection method between the connecting ring 224 and the fixing member 222 is not limited thereto, and a clamping member or a snap connection may also be adopted. Among them, the specific structural form of the fixing member 222 is not limited to a plate-like structure, and a bracket or other structural forms may also be adopted.

[0103] Furthermore, the support assembly 220 also includes a limiter, which is connected to the silo 210 and is located below the guide sleeve 221, and the limiter and the guide sleeve 221 are spaced apart. Since the limiter and the guide sleeve 221 are spaced apart by a certain distance, the silo 210 has a certain movable distance in the up and down directions. During the up and down vibration of the silo 210, when the silo 210 is at the lowest position, the limiter is away from the bottom surface of the guide sleeve 221; when the silo 210 is at the highest position, the limiter abuts against the bottom surface of the guide sleeve 221, thereby limiting the silo 210. In addition to limiting the silo 210, the limiter also serves as an anti-slip mechanism for the silo 210.

[0104] The limiting member can be a spring 223, which is elastic. A slot is provided on the outer peripheral surface of the silo 210, and the spring 223 is clamped in the slot. During the assembly process, the spring 223 only needs to be clamped in the slot, and no other fasteners are needed for fixing. The limiting member using the spring 223 structure has the advantages of simple structure and easy installation. Of course, the specific structure of the limiting member is not limited to the spring 223, and a limiting screw or a limiting block structure can also be used.

[0105] Continue reading Figure 4 and Figure 5 In some embodiments of the present invention, the vibration assembly 230 includes a connecting plate 231 and a vibrator 232 , and the connecting plate 231 is connected to the silo 210 .

[0106] Specifically, the connecting plate 231 is provided with a through hole, the connecting plate 231 is sleeved on the outer periphery of the silo 210, and the connecting plate 231 is connected to the silo 210 by bolts. The vibrator 232 is provided on the connecting plate 231, and the vibrator 232 is used to drive the silo 210 to vibrate in the up and down directions.

[0107] In this embodiment, two vibrators 232 are provided, and the two vibrators 232 are symmetrically arranged. The vibration amplitude and frequency of the vibrator 232 can be controlled by electric current. When working, the vibrator 232 can be infinitely adjusted according to different coal samples and required weights to ensure controllable blanking efficiency and weight. That is, by adjusting the vibration frequency and amplitude of the vibrator 232, the number of times and the size of the opening and closing of the gap between the blanking section 244 and the inner wall of the blanking hole 211 in a unit time can be changed, so as to achieve precise control of the speed of the coal sample powder. When the required weight is reached, the vibrator 232 stops vibrating, and the blanking section 244 blocks the blanking hole 211 to stop blanking.

[0108] Correspondingly, two connecting parts 234 are provided on the side of the connecting plate 231, the connecting parts 234 are integrally formed with the connecting plate 231, and the two connecting parts 234 are symmetrically arranged. Two vibrators 232 are arranged on the connecting plate 231 in a one-to-one correspondence. Preferably, a U-shaped holder 235 is provided on the connecting part 234, the U-shaped holder 235 is connected to the connecting part 234 by bolts, and the vibrator 232 is clamped between the U-shaped holder 235 and the connecting part 234.

[0109] Continuing to refer to the figures and the figures, in some embodiments of the present utility model, the vibration assembly 230 also includes a buffer muffler ring 233, and the material of the buffer muffler ring 233 is a flexible material; specifically, the material of the buffer muffler ring 233 is rubber or silicone. The outer peripheral surface of the silo 210 has a contact surface, and the contact surface is horizontally arranged, and the contact surface is located above the guide sleeve 221. The buffer muffler ring 233 is sleeved on the outer peripheral surface of the silo 210 and is located between the contact surface and the upper surface of the guide sleeve 221. When the silo 210 vibrates, by arranging the buffer muffler ring 233 between the silo 210 and the guide sleeve 221, the buffer muffler ring 233 can avoid collision between the silo 210 and the guide sleeve 221, reduce the generation of noise, and ensure that the feeding tooling 200 runs reliably and smoothly.

[0110] Figure 8 It is a structural schematic diagram of the lifting mechanism 120 in the automatic weighing device provided in an embodiment of the utility model; Fig. 9 It is a front view of the lifting mechanism 120 in the automatic weighing device provided in the embodiment of the utility model; Fig.10 It is a cross-sectional view of the lifting mechanism 120 in the automatic weighing device provided in the embodiment of the utility model.

[0111] See also Figures 8 to 10 In some embodiments of the present invention, the lifting mechanism 120 includes a carrying body 121 , a lifting bracket 122 and a driving assembly 123 .

[0112] The bearing body 121 bears the gravity of the entire automatic weighing device and is used to support the temporary storage platform 110, the feeding tool 200 and the adsorption tool 400, wherein the bearing body 121 can be a plate-like member with a certain thickness and width.

[0113] The lifting bracket 122 is fixedly mounted on the load-bearing body 121 by means of fasteners such as bolts, screws, and rivets, and the temporary storage platform 110 and the feeding tool 200 are mounted on the lifting bracket 122. A track portion 1221 is provided on one side of the lifting bracket 122 facing the load-bearing body 121.

[0114] The driving assembly 123 includes a driving component 1231 and a driven component 1232. The driven component 1232 is arranged at the driving end of the driving component 1231. The driven component 1232 is respectively movably matched with the track portion 1221 of the bearing body 121 and the lifting bracket 122. The driving component 1231 is a linear driving structure, such as a driving transmission mechanism such as a cylinder, a linear motor or a screw nut pair. The driving component 1231 can drive the driven component 1232 to reciprocate along a straight line, so that the driven component 1232 drives the lifting bracket 122 to perform lifting movement, thereby driving the temporary storage platform 110 and the feeding tooling 200 to perform lifting movement synchronously.

[0115] It should be noted that the driven component 1232 is movably matched with the track portion 1221 of the load-bearing body 121 and the lifting bracket 122, respectively. The driven component 1232 and the track portion 1221 of the load-bearing body 121 and the lifting bracket 122 may be slidably matched, or the driven component 1232 and the track portion 1221 of the load-bearing body 121 and the lifting bracket 122 may be rolled matched, or the driven component 1232 and one of the track portions 1221 of the load-bearing body 121 and the lifting bracket 122 may be slidably matched, and the driven component 1232 and the other of the track portions 1221 of the load-bearing body 121 and the lifting bracket 122 may be slidably matched. The specific setting can be set according to actual use requirements.

[0116] In an embodiment of the utility model, the temporary storage platform 110 and the feeding tool 200 are installed on the lifting bracket 122. When the lifting bracket 122 is lifted and lowered, the temporary storage platform 110 and the feeding tool 200 can move synchronously with the lifting bracket 122 to reduce the distance between the feeding tool 200 and the material container 600, thereby better realizing material dropping and avoiding the risk of material spillage or dust during the material dropping process due to the gap between the feeding tool 200 and the material container 600 being too large.

[0117] Of course, the temporary storage platform 110 can also be installed on the lifting bracket 122, and the feeding tool 200 is set above the temporary storage platform 110. The feeding tool 200 and the temporary storage platform 110 are set independently, which is equivalent to that the position of the feeding tool 200 can remain unchanged, and only the position of the temporary storage platform 110 needs to be changed, so as to realize the switching of the temporary storage platform 110 between the weighing state and the non-weighing state.

[0118] It is understandable that the lifting mechanism 120 provided in the embodiment of the utility model can be directly replaced by a linear drive structure installed on the supporting body 121. However, with this arrangement, all the gravity of the automatic weighing device is borne by the linear drive structure. When the linear drive structure drives the lifting bracket 122 to perform lifting and lowering movements, the stability is poor and there is a risk of slipping or falling. The lifting mechanism 120 provided in the embodiment of the present application is provided with a bearing body 121, a lifting bracket 122 and a driving assembly 123, and a track portion 1221 is provided on the side of the lifting bracket 122 facing the bearing body 121, so that the driving assembly 123 includes a driving component 1231 and a driven component 1232. When the driving component 1231 drives the driven component 1232 to reciprocate along a straight line, the driven component 1232 moves along the track portion 1221 to drive the lifting bracket 122 to perform a lifting movement, and then drives the temporary storage platform 110 to perform a lifting movement synchronously. During the movement, all the gravity of the automatic weighing device is borne by the bearing body 121, and the force borne by the driving component 1231 is the component force of all the gravity of the automatic weighing device. The driving component 1231 has better stability and reliability, and there is no risk of slipping or falling. At the same time, the performance requirements for the driving component 1231 are low, and the service life of the driving component 1231 is long.

[0119] See also Figures 8 to 10 In some embodiments of the present invention, the track portion 1221 includes a first track surface 1221 - 1 and a second track surface 1221 - 2 connected to each other, and the distance between the first track surface 1221 - 1 and the carrier body 121 is greater than the distance between the second track surface 1221 - 2 and the carrier body 121 .

[0120] Equivalently, the track portion 1221 is a groove structure formed by the bottom wall of the lifting bracket 122 being recessed upward, the first track surface 1221-1 is equivalent to the inner wall of the groove, and the second track surface 1221-2 is equivalent to the bottom wall of the lifting bracket 122, or a plane parallel to the bottom wall of the lifting bracket 122.

[0121] In the weighing state, it is equivalent to that the lifting bracket 122 needs to drive the temporary storage platform 110 to descend to approach the weighing beam 340. At this time, the driven component 1232 abuts against the first track surface 1221-1; in the non-weighing state, it is equivalent to that the lifting bracket 122 needs to drive the temporary storage platform 110 to rise to move away from the weighing beam 340. At this time, the driven component 1232 abuts against the second track surface 1221-2.

[0122] In addition, in order to make the driven component 1232 smoothly transition between the first track surface 1221 - 1 and the second track surface 1221 - 2 , an inclined surface or an arc-shaped transition surface is provided between the first track surface 1221 - 1 and the second track surface 1221 - 2 .

[0123] In addition, in order to limit the movement position of the driven component 1232, a first limiting surface (not numbered in the figure) is provided on one side of the first track surface 1221-1, and a second limiting surface (not numbered in the figure) is provided on one side of the second track surface 1221-2. When the driven component 1232 switches from the second track surface 1221-2 to the first track surface 1221-1, the first limiting surface limits the movement position of the driven component 1232, and when the driven component 1232 switches from the first track surface 1221-1 to the second track surface 1221-2, the second limiting surface limits the position of the driven component 1232, thereby preventing the driven component 1232 from over-travel operation, and further improving the operation stability of the driven component 1232.

[0124] Continue reading Figures 8 to 10 In some embodiments of the present invention, the driven component 1232 includes a supporting component and a rolling component, the supporting component is connected to the driving end of the driving component 1231, and mainly performs linear reciprocating motion with the driving component 1231. The rolling component is installed on the supporting component through a roller, and the rolling component and the lifting bracket 122 are rollingly matched.

[0125] In the embodiment of the utility model, a rolling component is arranged on the supporting component so that the rolling component and the lifting bracket 122 are in rolling cooperation. Compared with the sliding cooperation between the driven component 1232 and the supporting bracket, this method can convert the sliding friction between the driven component 1232 and the supporting bracket into rolling friction, thereby reducing the friction between the driven component 1232 and the supporting bracket, so as to reduce the driving force of the driving component 1231.

[0126] It should be noted that when the driven component 1232 rolls with the lifting bracket 122 through the rolling component, the supporting component of the driven component 1232 can slide with the supporting body 121; or the volume of the rolling component is set to be larger so that the rolling component can roll with both the lifting bracket 122 and the supporting body 121.

[0127] Continue reading Figures 8 to 10 In some embodiments of the utility model, the rolling component includes a first rolling component 1232-3 and a second rolling component 1232-4. The first rolling component 1232-3 is arranged above the supporting component and rollingly cooperates with the lifting bracket 122; the second rolling component 1232-4 is rotatably arranged below the supporting component and rollingly cooperates with the bearing body 121.

[0128] In other words, the rolling component is composed of two symmetrically arranged rolling elements, one of which is arranged above the supporting component and rolls with the lifting bracket 122. The other rolling element is arranged below the supporting component and rolls with the bearing body 121. The driven component 1232 is respectively matched with the lifting bracket 122 and the bearing body 121 in a rolling friction manner, which can reduce the friction between the driven component 1232 and the lifting bracket 122 and the bearing body 121, and reduce the driving requirements for the driving component 1231.

[0129] Continue reading Figures 8 to 10 In some embodiments of the utility model, the rolling component also includes a third rolling element 1232-5, the third rolling element 1232-5 and the second rolling element 1232-4 are arranged in a colinear manner, and the third rolling element 1232-5 rolls with the supporting body 121; wherein the connecting line between the first rolling element 1232-3, the second rolling element 1232-4 and the third rolling element 1232-5 forms an isosceles triangle.

[0130] In the embodiment of the utility model, the connecting lines between the first rolling element 1232-3, the second rolling element 1232-4 and the third rolling element 1232-5 form an isosceles triangle, and the principle of the stability of the triangle is adopted to further improve the support function and stability of the driven component 1232.

[0131] It should be noted that the first rolling member 1232-3, the second rolling member 1232-4 and the third rolling member 1232-5 can be rollers or transmission components such as bearings. Any structure that can achieve rolling contact between the driven component 1232 and the upper and lower contact surfaces is acceptable.

[0132] Continue reading Figures 8 to 10 In some embodiments of the utility model, the supporting component includes a first supporting member 1232-1 and a second supporting member 1232-2 which are arranged opposite to each other, and at least one of the first supporting member 1232-1 and the second supporting member 1232-2 is connected to the driving component 1231; the rolling component is located between the first supporting member 1232-1 and the second supporting member 1232-2, and the rolling component is respectively connected to the first supporting member 1232-1 and the second supporting member 1232-2 through a rotating shaft.

[0133] Among them, the first support member 1232-1 and the second support member 1232-2 are clamped on both sides of the lifting bracket 122, so that the lifting bracket 122 provides guidance and limiting functions for the supporting components, avoiding shaking or jamming of the driven component 1232 when moving with the driving component 1231, and further improving the stability of the operation of the driven component 1232.

[0134] Continue reading Figures 8 to 10In some embodiments of the present utility model, the lifting mechanism 120 further includes a guide assembly 124, the guide assembly 124 includes a guide rail 1241 and a slider 1242, and the slider 1242 is slidably matched with the guide rail 1241;

[0135] The guide rail 1241 is disposed on one of the lifting bracket 122 and the carrying body 121 , and the slider 1242 is disposed on the other of the lifting bracket 122 and the carrying body 121 .

[0136] That is, a guide rail 1241 can be provided on the lifting bracket 122, and a slider 1242 can be provided on the bearing body 121. The lifting bracket 122 and the bearing body 121 can be guided and limited by the cooperation between the guide rail 1241 and the slider 1242, which can further improve the operation stability of the driven component 1232.

[0137] Fig.11 It is a structural schematic diagram of the lifting bracket 122 in the automatic weighing device provided in an embodiment of the utility model (including the feeding tool 200).

[0138] Continue reading Figures 8 to 10 , and also see Fig.11 In some embodiments of the present utility model, the lifting bracket 122 includes a first frame 1222 and a second frame 1223 connected to each other, the first frame 1222 and the second frame 1223 are staggered, and the driving assembly 123 cooperates with the first frame 1222;

[0139] The temporary storage platform 110 is disposed on the first frame 1222 , and the feeding tool 200 is disposed on the second frame 1223 ; the first frame 1222 moves up and down along with the driving assembly 123 to synchronously drive the temporary storage platform 110 and the feeding tool 200 to move up and down.

[0140] The first frame 1222 includes a support body and a guide frame, the guide frame is fixedly connected to the support body, the temporary storage platform 110 is arranged on the support body, and the first track surface 1221-1 and the second track surface 1221-2 are arranged on the side of the guide frame facing the bearing body 121. The first frame 1222 is composed of the support body and the guide frame, which facilitates the processing of the components of the support body and the guide frame.

[0141] Such an arrangement enables the temporary storage platform 110 and the feeding fixture 200 to be raised and lowered synchronously. Since it is inconvenient to keep the position of the weighing fixture 300 fixed, when the temporary storage platform 110 is lowered to the weighing state along with the lifting bracket 122, the material container 600 is lifted by the weighing rod 340, and the feeding fixture 200 is also lowered synchronously to shorten the distance between the feeding fixture 200 and the weighing fixture 300, thereby bringing the feeding fixture 200 closer to the weighing fixture 300 to prevent the sample dropped from the feeding fixture 200 from being scattered on the outside of the material container 600.

[0142] Continue reading Figure 8 In some embodiments of the utility model, the supporting body 121 includes a base plate and two support seats arranged opposite to each other, the two support seats are arranged on the base plate at an interval, the guide rail 1241 or the slider 1242 is arranged on the support seats, a guide groove 1211 is opened on the base plate, and the driven component 1232 is embedded in the guide groove 1211.

[0143] When the driven component 1232 performs linear reciprocating motion with the driving component 1231, the freedom of the driven component 1232 in the up and down directions is limited by the lifting bracket 122 and the supported body 121, the freedom of the driven component 1232 in the left and right directions is limited by the cooperation of the guide rail 1241 and the slider 1242, and the freedom of the driven component 1232 in the front and back directions is limited by the guide groove 1211 and the clamping cooperation between the supporting component of the driven component 1232 and the lifting bracket 122. This arrangement is equivalent to limiting the freedom of the driven component 1232 in the six directions of up, down, left, right, front and back, which can further improve the reliability and stability of the movement of the driven component 1232.

[0144] Among them, the support seat may include a fixing part and an installation part, the fixing part and the installation part are arranged vertically to each other, the fixing part is fixed to the base plate by fasteners such as bolts and screws, and the guide rail 1241 or the slider 1242 is fixed to the installation part by fasteners such as bolts or screws.

[0145] In order to improve the structural strength of the support base, the support base also includes a reinforcing portion, which is located between the fixing portion and the mounting portion and is respectively connected to the fixing portion and the mounting portion to play a role in reinforcing the structure.

[0146] It should be noted that the support seat can be provided in an integral manner or in a split manner. When the support seat is provided in a split manner, the fixing portion, the mounting portion and the reinforcing portion are all plate-like structures.

[0147] Fig.12 It is a structural schematic diagram of the temporary storage platform 110 in the automatic weighing device provided in an embodiment of the utility model.

[0148] Continue reading Figures 1 to 4 , and also see Fig.12 In some embodiments of the present invention, the temporary storage platform 110 includes a platform body 112 and a rotary driving component 113 .

[0149] The rotary drive component 113 is disposed below the platform body 112 and is used to drive the platform body 112 to rotate along its own axis, so as to switch the temporary storage hole 111 between different workstations. The rotary drive component 113 may be a rotary cylinder, a rotary motor or a rotary bearing.

[0150] Continue reading Figures 1 to 4 In some embodiments of the utility model, the automatic weighing device also includes a covering tool 500, which is arranged in the downstream direction of the feeding tool 200. The covering tool 500 is used to cover the material container 600 after weighing to prevent the sample in the material container 600 from volatilizing, avoid the volatilization of volatile samples to affect the analysis results, and further improve the analysis efficiency.

[0151] Specifically, the capping tool 500 includes a cap storage mechanism and a capping mechanism. The cap storage mechanism is located below the platform body 112 and is used to store caps that need to be added. The cap storage mechanism can use a linear feeder and other equipment to transport the caps to the bottom of the capping mechanism in sequence.

[0152] The capping mechanism can adopt a clamp or a suction cup, which is coaxially arranged with the temporary storage hole 111. The capping mechanism passes through the temporary storage hole 111 to absorb or clamp the cover body of the capping mechanism. When the material container 600 to be weighed is rotated to the bottom of the capping mechanism along with the platform body 112, the capping mechanism falls and covers the cover body on the material container 600 to be transferred to the next workstation for analysis.

[0153] The working process of the automatic weighing device provided in the embodiment of the utility model is as follows, which is described by taking a coal sample as an example:

[0154] Before the automatic weighing device is operated, the coal sample powder is first loaded into the silo 210 .

[0155] When the driving component 1231 extends out to push the driven component 1232 out, the driven component 1232 moves from the first track surface 1221-1 of the lifting bracket 122 to the second track surface 1221-2, and the driven component 1232 lifts the lifting bracket 122, and the lifting bracket 122 drives the temporary storage platform 110 and the feeding tooling 200 to rise. At this time, the temporary storage platform 110 can rotate freely under the action of the rotary driving component 113, and the manipulator can transfer the material container 600 (such as a crucible) to the idle temporary storage hole 111. In this process, the manipulator can transfer all the material containers 600 that need to be weighed to the temporary storage holes 111 of the temporary storage platform 110, and wait for the material to be weighed in turn.

[0156] When the driving component 1231 shrinks and resets, the driven component 1232 moves linearly with the driving component 1231, and the driven component 1232 moves from the second track surface 1221-2 of the lifting bracket 122 to the first track surface 1221-1, and the lifting bracket 122 falls to drive the temporary storage platform 110 and the feeding tool 200 to fall. At this time, the bottom of the material container 600 (such as a crucible) on the temporary storage platform 110 contacts the weighing rod 340 and is lifted up by the weighing rod 340. The crucible is detached from the temporary storage hole 111 on the temporary storage platform 110, and the weight of the crucible is completely supported by the weighing rod 340. The feeding tool 200 drops the material into the crucible, which can ensure accurate weighing. After one weighing is completed, the temporary storage platform 110 and the feeding tool 200 of the automatic weighing device rise again and enter the non-weighing state, and this cycle is repeated to complete the weighing of all samples that need coal sample analysis.

[0157] When all indicators of a coal sample are weighed, the sample remaining in the feeding fixture 200 can be adsorbed and removed by the adsorption fixture 400 to prevent the coal sample weighed last time from mixing with the coal sample to be weighed next time, thereby preventing the measurement accuracy of the next coal sample from being affected.

[0158] When the sample being weighed is volatile, after the weighing is completed, the capping tool 500 is started to cap the weighing container to prevent the sample from volatilizing.

[0159] It should be noted that the technical solutions in various embodiments of the present utility model can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the protection scope of the present utility model.

[0160] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An automatic weighing device, characterized in that: include: Weighing tooling; A feeding tool is arranged coaxially with the weighing tool; A temporary storage tool is located between the weighing tool and the feeding tool. The temporary storage tool includes a temporary storage platform and a lifting mechanism. The temporary storage platform is provided with a plurality of temporary storage holes along a circumferential array. The temporary storage platform is suitable for rotating along its own axial direction. The lifting mechanism is suitable for driving the temporary storage platform to perform lifting and lowering movements, so that the temporary storage platform can be switched between a weighing state and a non-weighing state. In the non-weighing state, the temporary storage platform is away from the weighing tool, and a material container is placed on the temporary storage hole; In the weighing state, the temporary storage platform is close to the weighing fixture, the material container is separated from the temporary storage hole, the weighing fixture supports the material container, and the feeding fixture drops material into the material container for weighing; The adsorption tool is located above the feeding tool and is used for adsorbing the sample remaining in the feeding tool.

2. The automatic weighing device according to claim 1, characterized in that: The adsorption tooling comprises a dust hood, a dust pipe and a linear drive member; The dust suction pipe is suitable for connecting to a negative pressure device, and the dust suction cover is respectively connected to the dust suction pipe and the linear drive member so as to be extended under the action of the linear drive member and covered on the feeding tooling.

3. The automatic weighing device according to claim 1, characterized in that: The lifting mechanism comprises: Bearing body; A lifting bracket, suitable for installing the temporary storage platform and the feeding tool, wherein the lifting bracket is provided with a track portion on a side facing the bearing body; The driving assembly includes a driving component and a driven component, wherein the driven component is arranged at the driving end of the driving component, and the driven component is movably cooperated with the bearing body and the track part respectively; the driving component is suitable for driving the driven component to reciprocate along a straight line, so that the lifting bracket can be lifted and lowered, thereby driving the temporary storage platform to be lifted and lowered synchronously.

4. The automatic weighing device according to claim 3, characterized in that: The track portion comprises a first track surface and a second track surface connected to each other, wherein the distance between the first track surface and the bearing body is greater than the distance between the second track surface and the bearing body; In the weighing state, the driven component abuts against the first track surface; In the non-weighing state, the driven member abuts against the second track surface.

5. The automatic weighing device according to claim 3, characterized in that: The driven component comprises: A supporting component connected to the driving component; A rolling component is provided on the supporting component, and the rolling component and the track portion are in rolling cooperation, or the rolling component and the track portion and the bearing body are respectively in rolling cooperation.

6. The automatic weighing device according to claim 5, characterized in that: The rolling component includes a first rolling component and a second rolling component. The first rolling component is arranged above the supporting component and rollingly cooperates with the lifting bracket; the second rolling component is rotatably arranged below the supporting component and rollingly cooperates with the bearing body.

7. The automatic weighing device according to claim 6, characterized in that: The rolling component further includes a third rolling element, the third rolling element is arranged colinearly with the second rolling element, and the third rolling element is in rolling cooperation with the bearing body; Wherein, the connecting lines among the first rolling element, the second rolling element and the third rolling element form an isosceles triangle.

8. The automatic weighing device according to claim 3, characterized in that: The lifting mechanism further comprises a guide assembly, wherein the guide assembly comprises a guide rail and a slider, and the slider is slidably matched with the guide rail; The guide rail is arranged on one of the lifting bracket and the carrying body, and the slider is arranged on the other of the lifting bracket and the carrying body.

9. The automatic weighing device according to claim 8, characterized in that: The lifting bracket comprises a first frame and a second frame connected to each other, the first frame and the second frame are staggered, the temporary storage platform is arranged on the first frame, and the feeding tool is arranged on the second frame; The guide rails or the sliders are arranged on both sides of the first frame, and the track portion is arranged on one side of the first frame facing the bearing body.

10. The automatic weighing device according to claim 1, characterized in that: It also includes a covering tool, which is arranged downstream of the feeding tool and is used to cover the material container after weighing to prevent the sample in the material container from volatilizing.

11. The automatic weighing device according to any one of claims 1 to 10, characterized in that: The feeding tooling comprises: A material bin, provided with a material cavity and a material drop hole communicated with the material cavity; A support assembly is sleeved on the outer peripheral surface of the silo and movably cooperates with the silo; A vibration component, connected to the silo, and used to drive the silo to vibrate and drop materials; A limiting component can be movably inserted into the blanking hole and is suitable for switching between a first position and a second position; in the first position, the limiting component is in contact with the blanking hole to block the blanking hole; in the second position, the limiting component is away from the blanking hole, and a blanking gap is formed between the limiting component and the inner wall of the blanking hole.

12. The automatic weighing device according to any one of claims 1 to 10, characterized in that: The weighing tool comprises a balance arranged on a base, the balance is provided with a balance support, a weighing beam is connected to the balance support, and the weighing beam is coaxially arranged with the temporary storage hole for supporting the material container.

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