A device and method for detecting the tap density of a powdered sample

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By designing a closed-loop device for detecting the tap density of powdered samples, the problem of dust scattering during the feeding, weighing, and vibration processes of powdered samples was solved, achieving a safe and efficient testing environment and operating procedure.

CN117606978BActive Publication Date: 2026-07-21HEBEI CAIKE CHEM CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: HEBEI CAIKE CHEM CO LTD
Filing Date: 2023-12-05
Publication Date: 2026-07-21

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Abstract

The present application relates to tap density detection equipment technical field, specifically to a kind of powder sample tap density detection device and detection method, when movable cylinder is driven to move horizontally to feeding position by slider, the top opening of movable cylinder is aligned with the bottom opening of feeding cylinder, third sealing plate and the first sealing plate of top are opened, when movable cylinder is driven to move horizontally to discharge position by slider, the bottom opening of movable cylinder is aligned with the top opening of graduated cylinder, second sealing plate and the first sealing plate of bottom are opened, combined with the volume value read out by graduated cylinder, finally the tap density of the sample of this detection is obtained, during the process of powder sample feeding, weighing and vibration detection, manual operation steps are reduced, and powder sample is in relatively closed state during the process, greatly avoid dust scattering floating in surrounding air, inhaled by human body or directly contacted, so that the detection working environment is greatly improved.

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Description

Technical Field

[0001] This invention relates to the field of tap density testing equipment, and in particular to a device and method for testing the tap density of powdered samples. Background Technology

[0002] Tap density testing involves continuously vibrating a graduated cylinder containing a powder or granular sample using a mechanical vibration device, gradually compacting the powder or particles within the cylinder. The volume of the graduated cylinder is then read, and the density of the compacted powder or particles is determined based on the sample mass. This method is crucial for powder production, processing, and research and development, and is widely used in pharmaceutical, chemical, and food industries. In the actual production and quality inspection of anhydrous iron phosphate and iron oxide powders, especially iron phosphate powder primarily used in battery materials, the tap density and other physicochemical properties significantly impact the quality of lithium-ion batteries and are a vital indicator for evaluating active materials. However, in practical testing, existing tap density meters, such as those used in Chinese patent literature, are insufficient. CN114544426A discloses a permanent magnet tap density meter, and CN211553652U discloses a tap density meter, etc. These meters use a vibration component to drive a vibration seat to vibrate, which in turn drives a scale measuring cup on the vibration seat to vibrate, thereby realizing the detection of tap density. During the feeding, weighing, and vibration detection processes, the powdered sample is in a completely exposed state. The sample dust is scattered and floats in the surrounding air, which can be inhaled or directly contacted by the human body, seriously affecting the working environment of the testing personnel. In particular, iron phosphate powder used in battery materials has a certain degree of irritation to the human body. In actual operation, it is necessary to wear dust masks, nitrile gloves, protective clothing, and protective glasses. The safety protection requirements for the testing environment are very stringent. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide a device and method for detecting the tapped density of powdered samples, so as to solve the problem that in the existing tapped density detection, the powdered sample is always in a completely exposed state during the feeding, weighing and vibration detection process, which affects the detection working environment.

[0004] To achieve the above objectives, the present invention provides a device for detecting the tap density of powdered samples, comprising a main body of the detector, a vibrating seat at the top of the main body, and a graduated cylinder connected to the vibrating seat for vibrating the graduated cylinder for detection.

[0005] A weighing platform is mounted on top of the main body of the detector. A slider is slidably connected to the weighing platform, and a movable measuring cylinder is connected to the slider through a weighing mechanism. In the initial state, the slider is located at the weighing position on the weighing platform. The weighing platform has a feed position and a discharge position on both sides of the weighing position.

[0006] The top and bottom openings of the movable graduated cylinder are elastically connected to a first sealing plate, and the top opening of the scaled graduated cylinder is elastically connected to a second sealing plate. In the initial state, the first sealing plate closes the top and bottom openings of the movable graduated cylinder, and the second sealing plate closes the top opening of the scaled graduated cylinder.

[0007] A hanging bracket is installed above the weighing platform, and a feeding cylinder is connected to the hanging bracket. A third sealing plate is elastically connected to the bottom opening of the feeding cylinder. In the initial state, the third sealing plate closes the bottom opening of the feeding cylinder. When the sliding block moves the movable cylinder to the feeding position, the top opening of the movable cylinder aligns with the bottom opening of the feeding cylinder, and the third sealing plate and the top first sealing plate open. When the sliding block moves the movable cylinder to the discharge position, the bottom opening of the movable cylinder aligns with the top opening of the scale cylinder, and the second sealing plate and the bottom first sealing plate open.

[0008] Preferably, a horizontal sliding groove is provided on the weighing platform, and the slider is slidably connected in the horizontal sliding groove.

[0009] Preferably, the first sealing plate is slidably connected to the top and bottom openings of the movable measuring cylinder, and a first elastic element is connected between the first sealing plate and the movable measuring cylinder to drive the first sealing plate to slide into an initial closed state. The second sealing plate is slidably connected to the top opening of the scale measuring cylinder, and a second elastic element is connected between the second sealing plate and the scale measuring cylinder to drive the second sealing plate to slide into an initial closed state. The third sealing plate is slidably connected to the bottom opening of the feed measuring cylinder, and a third elastic element is connected between the third sealing plate and the feed measuring cylinder to drive the third sealing plate to slide into an initial closed state. One side of the first sealing plate extends beyond the side of the movable measuring cylinder. At the end of the measuring cylinder, a second push plate is fixedly connected to the second sealing plate, and a third push plate is fixedly connected to the third sealing plate. Push rods are fixedly connected to the side ends of the feeding cylinder and the measuring cylinder, respectively. When the movable measuring cylinder moves laterally to the feeding position, the side end of the movable measuring cylinder pushes the third push plate, and at the same time, the push rod pushes the first sealing plate at the top of the movable measuring cylinder beyond one side end, so that the third sealing plate and the first sealing plate at the top open synchronously. When the movable measuring cylinder moves laterally to the discharging position, the side end of the movable measuring cylinder pushes the second push plate, and at the same time, the push rod pushes the first sealing plate at the bottom of the movable measuring cylinder beyond one side end, so that the second sealing plate and the first sealing plate at the bottom open synchronously.

[0010] Preferably, the movable measuring cylinder includes a straight cylinder section at the upper and lower ends and an inclined cylinder section in the middle. The straight cylinder sections at the upper and lower ends are staggered, and the straight cylinder section and the inclined cylinder section are designed to rotate. Two sets of vibrating seats are arranged at intervals along the top of the main body of the detector. By turning the inclined cylinder section and the straight cylinder section at the lower end, the material is discharged to the two sets of measuring cylinders respectively.

[0011] Preferably, an inner cylinder is elastically connected inside the straight cylinder section. One side of the head end of the inner cylinder is designed with an inclined end face. When the first sealing plate is opened, the head end of the inner cylinder pops out of the straight cylinder section. The side end of the higher side of the inner cylinder abuts against the inner wall of the feed measuring cylinder or the inner wall of the scale measuring cylinder, and the side end of the lower side of the inner cylinder abuts against the side end of the first sealing plate.

[0012] Preferably, a hanging ear is provided on one side end of the straight section, and a limit ring is connected to the detection end of the weighing mechanism for directional attachment of the hanging ear.

[0013] Preferably, the feed cylinder includes an upper flared section and a lower straight section. One end of the bracket is provided with a limiting port, the inner diameter of which matches the outer diameter of the straight section, for positioning and fitting the straight section.

[0014] Preferably, a locking bolt is connected to the side end of the limiting port, with one end of the locking bolt inserted into the limiting port to abut against the straight opening.

[0015] This invention also provides a method for detecting the tap density of powdered samples, comprising the following steps:

[0016] The feed cylinder containing the powder sample is mounted on the hanger. The slider moves the movable cylinder laterally to the feed position until the top opening of the movable cylinder aligns with the bottom opening of the feed cylinder. The third sealing plate and the top first sealing plate open, allowing the powder in the feed cylinder to fall into the movable cylinder. The slider then moves the movable cylinder laterally to the weighing position, where the first mass value is obtained. The slider then moves the movable cylinder laterally to the discharge position until the bottom opening of the movable cylinder aligns with the top opening of the scale cylinder. The second sealing plate and the bottom first sealing plate open, allowing the powder in the movable cylinder to fall into the scale cylinder. The slider then moves the movable cylinder laterally to the weighing position, where the second mass value is obtained. The difference between the first and second mass values is the actual mass of the powder sample tested by vibration. Combined with the volume value read from the scale cylinder, the final measured density of the sample is obtained.

[0017] Preferably, the movable measuring cylinder includes a straight cylinder section at the upper and lower ends and an inclined cylinder section in the middle. The straight cylinder sections at the upper and lower ends are staggered and are rotatably connected. Two sets of vibrating seats are spaced apart along the top of the main body of the detector. After the measuring cylinder on one side discharges material for testing, the inclined cylinder section and the straight cylinder section at the lower end are rotated to °. The movable measuring cylinder is then moved laterally to the feeding position by the slider for secondary feeding. It is then moved laterally to the weighing position for secondary weighing. The movable measuring cylinder is then moved laterally to the discharge position by the slider. The straight cylinder section at the lower end is directly opposite the measuring cylinder on the other side for discharge testing, thus realizing two batch testings of the powder sample in the feeding measuring cylinder.

[0018] The beneficial effects of this invention are as follows: The movable measuring cylinder is moved laterally to the feeding position by the slider until the top opening of the movable measuring cylinder is aligned with the bottom opening of the feeding measuring cylinder. The third sealing plate and the first sealing plate at the top are opened, and the powder in the feeding measuring cylinder falls downward into the movable measuring cylinder. Then, the movable measuring cylinder is moved laterally to the weighing position by the slider, and then moved laterally to the discharge position by the slider. The bottom opening of the movable measuring cylinder is aligned with the top opening of the scale measuring cylinder. The second sealing plate and the first sealing plate at the bottom are opened, and the powder in the movable measuring cylinder falls downward into the scale measuring cylinder. Combined with the volume value read from the scale measuring cylinder, the tap density of the sample in this test is finally obtained.

[0019] Therefore, the manual operation steps are reduced during the feeding, weighing, and vibration testing of powdered samples. The powdered samples are in a relatively closed state during the process, which greatly avoids dust from being scattered and floating in the surrounding air and being inhaled or directly contacted by the human body. This greatly improves the testing environment. Especially for the tap density testing of iron phosphate powder used in battery materials, although personnel entering the quality inspection room are still required to wear protective equipment for safety reasons, the safety hazards to personnel in the room are greatly reduced. The requirements for safety protection and the level of protective equipment are lowered, and the maintenance cycle of the quality inspection room and protective equipment is greatly shortened. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 For the present invention Figure 1 Enlarged view of point B in the middle;

[0024] Figure 4 This is a schematic diagram of the transverse sliding groove of the present invention;

[0025] Figure 5 This is a schematic diagram of the weighing mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the limiting ring of the present invention;

[0027] Figure 7This is a schematic diagram of the structure of the slider of the present invention when it slides towards the feed position;

[0028] Figure 8 For the present invention Figure 7 Enlarged view of point C in the middle;

[0029] Figure 9 This is a schematic diagram of the structure of the slider of the present invention when it slides to the feed position;

[0030] Figure 10 For the present invention Figure 9 Enlarged view of point D in the middle;

[0031] Figure 11 This is a schematic diagram of the structure of the slider of the present invention when it slides to the discharge position;

[0032] Figure 12 For the present invention Figure 11 Enlarged view of point E in the middle;

[0033] Figure 13 This is a schematic diagram of the inclined cylinder section of the present invention when it is turning;

[0034] Figure 14 This is a schematic diagram of the structure of the straight section at the lower end of the present invention when it turns.

[0035] The diagram is marked as follows:

[0036] 1. Main body of the detector; 2. Vibration seat; 3. Scale measuring cylinder; 31. Second sealing plate; 32. Second elastic element; 33. Second push plate; 4. Weighing platform; 41. Weighing position; 42. Feeding position; 43. Discharge position; 44. Horizontal slide groove; 46. Screw component; 5. Sliding block; 6. Weighing mechanism; 7. Movable measuring cylinder; 701. Straight cylinder section; 702. Inclined cylinder section; 703. Inner cylinder; 71. First sealing plate; 72. First elastic element; 8. Hanger; 9. Feed measuring cylinder; 901. Flared section; 902. Straight section; 91. Third sealing plate; 92. Third elastic element; 93. Third push plate; 10. Push rod; 11. Hanging lug; 12. Limiting ring; 13. Limiting port; 14. Locking bolt. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0038] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 9 , Figure 11 As shown, a device for detecting the tap density of powdered samples includes a main body 1, a vibrating seat 2 at the top of the main body 1, and a graduated cylinder 3 connected to the vibrating seat 2 for vibrating the graduated cylinder 3. A weighing platform 4 is mounted above the main body 1, and a slider 5 is slidably connected to the weighing platform 4. A movable graduated cylinder 7 is connected to the slider 5 via a weighing mechanism 6. In the initial state, the slider 5 is located at the weighing position 41 on the weighing platform 4. A feed position 42 and a discharge position 43 are respectively located on both sides of the weighing position 41 on the weighing platform 4. A first sealing plate 71 is elastically connected to the top opening and bottom opening of the movable graduated cylinder 7, and a second sealing plate 31 is elastically connected to the top opening of the graduated cylinder 3. In the initial state, the first sealing plate 71 is closed. The top and bottom openings of cylinder 7 are in the state of the second sealing plate 31 closing the top opening of the measuring cylinder 3. A hanging bracket 8 is mounted above the weighing platform 4, and a feeding cylinder 9 is connected to the hanging bracket 8. A third sealing plate 91 is elastically connected to the bottom opening of the feeding cylinder 9. In the initial state, the third sealing plate 91 closes the bottom opening of the feeding cylinder 9. When the movable measuring cylinder 7 is moved laterally to the feeding position 42 by the slider 5, the top opening of the movable measuring cylinder 7 aligns with the bottom opening of the feeding cylinder 9, and the third sealing plate 91 and the top first sealing plate 71 open. When the movable measuring cylinder 7 is moved laterally to the discharge position 43 by the slider 5, the bottom opening of the movable measuring cylinder 7 aligns with the top opening of the measuring cylinder 3, and the second sealing plate 31 and the bottom first sealing plate 71 open.

[0040] This invention is based on an existing tapped density meter, including a main body 1, a vibrating seat 2 at the top of the main body 1, and a graduated cylinder 3 connected to the vibrating seat 2. A vibration component inside the main body 1 drives the vibrating seat 2 to vibrate, thereby causing the graduated cylinder 3 to vibrate for detection. A weighing platform 4 is mounted above the main body 1, and a slider 5 is slidably connected to the weighing platform 4. A movable graduated cylinder 7 is connected to the slider 5 via a weighing mechanism 6. Initially, the slider 5 is located at the weighing position 41 on the weighing platform 4. An inlet position 42 and an outlet position 43 are respectively located on both sides of the weighing position 41 on the weighing platform 4. A first sealing plate 71 is elastically connected to the top and bottom openings of the movable graduated cylinder 7, and a second sealing plate 31 is elastically connected to the top opening of the graduated cylinder 3. In the current state, the first sealing plate 71 closes the top and bottom openings of the movable measuring cylinder 7, and the second sealing plate 31 closes the top opening of the scale measuring cylinder 3. A hanging bracket 8 is mounted above the weighing platform 4, and a feeding measuring cylinder 9 is connected to the hanging bracket 8. A third sealing plate 91 is elastically connected to the bottom opening of the feeding measuring cylinder 9. In the initial state, the third sealing plate 91 closes the bottom opening of the feeding measuring cylinder 9. The feeding measuring cylinder 9, the movable measuring cylinder 7, and the scale measuring cylinder 3 are all detachably assembled and connected. The feeding measuring cylinder 9 can be supplied from the powder production end, for example, connected to the powder production transmission pipeline to receive powder samples. The feeding measuring cylinder 9, which has been filled with powder samples, is sent into the quality inspection room and assembled on the hanging bracket 8. The movable measuring cylinder 7 is moved laterally towards the feed by the slider 5. The material level is adjusted until the top opening of the movable measuring cylinder 7 aligns with the bottom opening of the feeding measuring cylinder 9. The third sealing plate 91 and the top sealing plate 71 open, allowing the powder in the feeding measuring cylinder 9 to fall into the movable measuring cylinder 7. The slider 5 then moves the movable measuring cylinder 7 laterally to the weighing position 41, where the first mass value is obtained. The slider 5 then moves the movable measuring cylinder 7 laterally to the discharge position 43, aligning the bottom opening of the movable measuring cylinder 7 with the top opening of the scale measuring cylinder 3. The second sealing plate 31 and the bottom sealing plate 71 open, allowing the powder in the movable measuring cylinder 7 to fall into the scale measuring cylinder 3. The slider 5 then moves the movable measuring cylinder 7 laterally to the weighing position 41, where the second mass value is obtained. The difference between the first and second mass values is the actual compaction test result. The mass of the powder sample, combined with the volume value read from the graduated cylinder 3, ultimately yields the tap density of the sample for this test. This reduces manual operation steps during the feeding, weighing, and vibration testing of the powder sample. Furthermore, the powder sample is kept in a relatively enclosed state during the process, greatly preventing dust from scattering and floating in the surrounding air, and avoiding inhalation or direct contact with the human body. This significantly improves the testing environment, especially for the tap density testing of iron phosphate powder used in battery materials. Although personnel entering the quality inspection room are still required to wear protective equipment for safety reasons, the safety hazards to personnel inside the room are greatly reduced. The requirements for safety protection and the level of protective equipment are lowered, and the maintenance cycle of the quality inspection room and protective equipment is significantly shortened.

[0041] In embodiments of the present invention, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a horizontal sliding groove 44 is provided on the weighing platform 4, and the slider 5 is slidably connected in the horizontal sliding groove 44. Specifically, a lead screw 46 can be arranged in parallel in the horizontal sliding groove 44, and the slider 5 is engaged with the lead screw 46. The lead screw 46 is driven to rotate by a power component such as a drive motor at one end, thereby driving the slider 5 to move laterally back and forth along the horizontal sliding groove 44. In the initial state, the lead screw 46 is driven to rotate by a power component such as a drive motor, thereby driving the slider 5 to move to the middle weighing position 41.

[0042] In embodiments of the present invention, such as Figures 1 to 12As shown, the first sealing plate 71 is slidably connected to the top and bottom openings of the movable measuring cylinder 7, and a first elastic element 72 is connected between the first sealing plate 71 and the movable measuring cylinder 7 to drive the first sealing plate 71 to slide into an initial closed state. The second sealing plate 31 is slidably connected to the top opening of the scale measuring cylinder 3, and a second elastic element 32 is connected between the second sealing plate 3 and the scale measuring cylinder 3 to drive the second sealing plate 31 to slide into an initial closed state. The third sealing plate 91 is slidably connected to the bottom opening of the feed measuring cylinder 9, and a third elastic element 92 is connected between the third sealing plate 9 and the feed measuring cylinder 9 to drive the third sealing plate 91 to slide into a closed state. The movement is initially in a closed state. Specifically, the first elastic element 72, the second elastic element 32, and the third elastic element 92 all adopt existing elastic components such as springs. One side end of the first sealing plate 71 extends beyond the side end of the movable measuring cylinder 7. A second push plate 33 is fixedly connected to the second sealing plate 31, and a third push plate 93 is fixedly connected to the third sealing plate 91. Push rods 10 are fixedly connected to the side ends of the feeding measuring cylinder 9 and the scale measuring cylinder 3, respectively. Specifically, the third push plate 93 is connected to the bottom end of the third sealing plate 91 near the movable measuring cylinder 7, and the second push plate 33 is connected to the top end of the second sealing plate 31 near the movable measuring cylinder 7. On one side of the movable measuring cylinder 7, specifically, the push rod 10 is located on the same side of the second push plate 33 and the third push plate 93, and the push rod 10 is L-shaped. The horizontal part of the push rod 10 is fixedly connected to the side end of the feeding measuring cylinder 9 and the scale measuring cylinder 3. The vertical part of the push rod 10 is used to push the first sealing plate 71 beyond the side end of the movable measuring cylinder 7. Thus, when the movable measuring cylinder 7 moves laterally to the feeding position 42, the side end of the movable measuring cylinder 7 pushes the third push plate 93, and at the same time, the push rod 10 pushes the first sealing plate 71 at the top end beyond one side end of the movable measuring cylinder 7, so that the third sealing plate 91 and the first sealing plate at the top end... 71. Simultaneous opening: During the process of the movable measuring cylinder 7 moving laterally to the feeding position 42, the bottom opening of the feeding measuring cylinder 9 and the top opening of the movable measuring cylinder 7 open simultaneously, and the gradually opening parts remain vertically opposite each other until the movable measuring cylinder 7 is completely moved laterally to the feeding position 42, and the bottom opening of the feeding measuring cylinder 9 and the top opening of the movable measuring cylinder 7 are completely aligned, realizing the closed feeding from the feeding measuring cylinder 9 to the movable measuring cylinder 7. At this time, since the movable measuring cylinder 7 is far away from the discharge position 43, the bottom of the movable measuring cylinder 7 is far away from the top of the scale measuring cylinder 3, so the bottom of the movable measuring cylinder 7 and the top of the scale measuring cylinder 3 remain closed.

[0043] After feeding is completed, preferably, when the weight of the feeding reaches a certain preset value by the weighing mechanism 6, the movable measuring cylinder 7 is moved laterally to the weighing position 41 by the slider 5. At this time, the movable measuring cylinder 7 is completely separated from the feeding measuring cylinder 9 and the scale measuring cylinder 3, and all the first sealing plate 71, the second sealing plate 31 and the third sealing plate 91 are in a closed state. The first mass value is measured by the weighing mechanism 6.

[0044] Then, the movable measuring cylinder 7 is moved laterally to the discharge position 43 by the slider 5. When the movable measuring cylinder 7 moves laterally to the discharge position 43, the side end of the movable measuring cylinder 7 pushes the second push plate 33, and at the same time, the push rod 10 pushes the first sealing plate 71 at the bottom end to go beyond one side end of the movable measuring cylinder 7, so that the second sealing plate 31 and the first sealing plate 71 at the bottom end open synchronously. That is, during the process of the movable measuring cylinder 7 moving laterally to the discharge position 43, the top opening of the scale measuring cylinder 3 and the bottom opening of the movable measuring cylinder 7 open synchronously, and the gradually opened parts remain vertically opposite each other until the movable measuring cylinder 7 is completely moved laterally to the discharge position 43, and the top opening of the scale measuring cylinder 3 and the bottom opening of the movable measuring cylinder 7 are completely aligned, realizing the closed discharge from the movable measuring cylinder 7 to the scale measuring cylinder 3. At this time, since the movable measuring cylinder 7 is far away from the feed position 42, the top end of the movable measuring cylinder 7 is far away from the bottom end of the feed measuring cylinder 9, so the top end of the movable measuring cylinder 7 and the bottom end of the feed measuring cylinder 9 remain closed.

[0045] After the material is discharged, preferably, when the weight of the discharged material reaches a certain set value as sensed by the weighing mechanism 6, the movable measuring cylinder 7 is moved laterally to the weighing position 41 by the slider 5. At this time, the movable measuring cylinder 7 is completely separated from the feeding measuring cylinder 9 and the scale measuring cylinder 3, and all the first sealing plate 71, the second sealing plate 31 and the third sealing plate 91 are in a closed state. The second mass value is measured by the weighing mechanism 6. The difference between the first mass value and the second mass value is the mass of the powder sample actually tested by vibration. At this time, the vibration component in the main body 1 of the detector drives the vibration seat 2 to vibrate, thereby driving the scale measuring cylinder 3 to vibrate for detection. Combined with the volume value read from the scale measuring cylinder 3, the final tap density of the sample is obtained. In the entire process of feeding, weighing and vibration detection of the powder sample, the manual operation steps are reduced, and the powder sample is in a relatively closed state during the process.

[0046] In embodiments of the present invention, such as Figures 1 to 12 As shown, the movable measuring cylinder 7 includes a straight cylindrical section 701 at the upper and lower ends and an inclined cylindrical section 702 in the middle. The straight cylindrical sections 701 at the upper and lower ends are staggered. The straight cylindrical section 701 and the inclined cylindrical section 702 are rotatably connected. Preferably, the outer port of the straight cylindrical section 701 is designed to be rectangular to facilitate sealing the inlet and outlet. The inner port of the straight cylindrical section 701 near the inclined cylindrical section 702 is designed to be circular. The inclined cylindrical section 702 is designed to be cylindrical to facilitate the connection between the two ends of the inclined cylindrical section 702 in the middle. The straight cylinder 701 is rotatably connected. Specifically, a conventional rotatable connection method can be used. For example, a snap-fit device is provided at the upper and lower ends of the inclined cylinder 702. An annular groove is opened at the end of the straight cylinder 701 facing the inclined cylinder 702. The snap-fit device is inserted into the annular groove for limitation and can rotate around the annular groove. Two sets of vibrating seats 2 are arranged at intervals along the top of the main body 1 of the detector. By turning the inclined cylinder 702 and the lower straight cylinder 701, it is used to discharge material to the two sets of scale measuring cylinders 3 respectively. Specifically, such as... Figure 13 , Figure 14As shown, for example, after the discharge test of the left-hand graduated measuring cylinder 3, the inclined cylinder 702 and the lower straight cylinder 701 are rotated 180°, and the lower straight cylinder 701 is rotated to the right side of the right-hand graduated measuring cylinder 3. During the interval of the left-hand graduated measuring cylinder 3 test, the movable measuring cylinder 7 can be moved laterally to the feed position 42 by the slider 5 for secondary feeding. The above is repeated for secondary weighing. The movable measuring cylinder 7 is moved laterally to the left to the discharge position 43 by the slider 5. At this time, the lower straight cylinder 701 is facing the discharge test of the right-hand graduated measuring cylinder 3. Thus, there is no need to adjust the lateral movement test process. If necessary, the powder sample in the feed measuring cylinder 9 can be tested twice in batches using the two sets of graduated measuring cylinders 3, which is conducive to more reliable vibration density verification. After the test is completed, the new feed measuring cylinder 9 and graduated measuring cylinder 3 are replaced for the next batch of continuous testing. After a certain period of use, the removed graduated measuring cylinder 3, movable measuring cylinder 7 and feed measuring cylinder 9 can be cleaned and reused.

[0047] In embodiments of the present invention, such as Figures 1 to 12As shown, an inner cylinder 703 is elastically connected inside the straight cylinder 701. The inner cylinder 703 can be designed with the same rectangular shape as the head end of the straight cylinder 701. One side of the head end of the inner cylinder 703 is designed with an inclined end face. When the first sealing plate 71 is opened, the head end of the inner cylinder 703 pops out of the straight cylinder 701 until the first sealing plate 71 is fully opened and the inner cylinder 703 is fully extended. The side end of the higher side of the inner cylinder 703 abuts against the inner wall of the feed measuring cylinder 9 or the inner wall of the scale measuring cylinder 3. Thus, when the movable measuring cylinder 7 moves to the feed position 42 or the discharge position 43, the movable measuring cylinder 7 and the feed measuring cylinder 9 or the scale measuring cylinder are connected. There must always be a certain height gap between the three measuring cylinders. If the gap is too small, the movable measuring cylinder 7 may collide with the feed measuring cylinder 9 or the scale measuring cylinder 3. Therefore, the inner cylinder 703 is designed to pop out for feeding and discharging, which further facilitates sealing the feeding and discharging. On the other hand, when the slider 5 moves the movable measuring cylinder 7 to the feed position 42 or the discharge position 43, the pusher rod 10, the second push plate 33, and the third push plate 93 push the sealing plate open. However, if the slider 5 moves too far, it may damage the pusher rod 10, the second push plate 33, and the third push plate 93. When the inner cylinder 703 pops out... Its side end abuts against the inner wall of the feed measuring cylinder 9 or the inner wall of the scale measuring cylinder 3, further preventing the slider 5 from moving too far and damaging the parts, which is conducive to stable feeding and discharging positioning. At the same time, when the inner cylinder 703 is fully ejected, the lower side end of the inner cylinder 703 abuts against the side end of the first sealing plate 71. When the slider 5 drives the movable measuring cylinder 7 to move towards the weighing position 41, that is, to move away from the feeding position 42 or the discharging position 43, since the inner wall of the feed measuring cylinder 9 or the inner wall of the scale measuring cylinder 3 is higher than the lower side end of the inner cylinder 703, the inner wall of the feed measuring cylinder 9 or the inner wall of the scale measuring cylinder 3 pushes against the inner cylinder 703. The inclined end face of the head pushes the inner cylinder 703 back into the movable measuring cylinder 7 until the first sealing plate 71 moves back to close, pushing the inner cylinder 703 completely into the movable measuring cylinder 7. In addition, when cleaning the movable measuring cylinder 7, you only need to manually open the first sealing plate 71, and the inner cylinder 703 will pop out naturally. Since the lower side end of the inner cylinder 703 abuts against the side end of the first sealing plate 71, the inner cylinder 703 remains in the popped-out state, which is conducive to convenient rinsing inside the cylinder. After cleaning, manually press the inner cylinder 703 down slightly, and the first sealing plate 71 will automatically and elastically close, driving the inner cylinder 703 to be pressed back into place.

[0048] In embodiments of the present invention, such as Figures 1 to 12 As shown, a lug 11 is provided on one side end of the straight section 701, and a limit ring 12 is connected to the detection end of the weighing mechanism 6. Figure 5 , Figure 6As shown, one side of the fixed end of the weighing mechanism 6 is fixedly connected to the side of the slider 5. The detection end of the weighing mechanism 6 adopts a side-hanging design. Specifically, a hanging wall is rotatably connected inside the fixed end of the weighing mechanism 6. A weighing sensor is abutted against the hanging wall directly below the fixed end of the weighing mechanism 6. The side hanging end of the hanging wall extending out of the fixed end of the weighing mechanism 6 is connected to a limit ring 12. The hanging ear 11 is L-shaped. The horizontal part of the hanging ear 11 is fixedly connected to one side of the straight cylinder 701. The vertical part of the hanging ear 11 is rectangular. The inner hole of the limit ring 12 is a corresponding rectangular hole. Thus, the vertical part of the hanging ear 11 is oriented and inserted into the limit ring 12. The weight of the movable measuring cylinder 7 acts on the hanging wall and is sensed by the weighing sensor. The sensed weight signal is converted and processed by net weight to obtain the mass of the powder in the cylinder, realizing the hanging and weighing of the movable measuring cylinder 7. The hanging ear 11 is located on the opposite side of the upper and lower straight cylinder 701, for example... Figure 1 As shown, the lug 11 of the upper straight cylindrical portion 701 is located on the inner side and is used to attach to the limiting ring 12, while the lug 11 of the lower straight cylindrical portion 701 is located on the visible outer side.

[0049] In embodiments of the present invention, such as Figures 1 to 12 As shown, the feeding cylinder 9 includes an upper flared portion 901 and a lower straight portion 902. One end of the bracket 8 is provided with a limiting port 13. The inner diameter of the limiting port 13 matches the outer diameter of the straight portion 902 and is used for positioning and fitting the straight portion 902. Preferably, the inner holes of the straight portion 902 and the limiting port 13 are designed to match rectangular shapes, which is conducive to the stable directional insertion of the feeding cylinder 9. The scale cylinder 3 is also designed to match the outer port of the straight cylinder 701 and the feeding cylinder 9, which is conducive to sealing the inlet and outlet.

[0050] In embodiments of the present invention, such as Figures 1 to 12 As shown, a locking bolt 14 is connected to the side end of the limiting port 13. One end of the locking bolt 14 is inserted into the limiting port 13 and engages with the side end of the limiting port 13. Preferably, a limiting groove can also be provided on one side of the feeding cylinder 9. So when the feeding cylinder 9 is inserted into the limiting port 13 on the bracket 8, the inner end of the locking bolt 14 is pressed against the limiting groove on the straight part 902 by turning the locking bolt 14.

[0051] This invention also provides a method for detecting the tap density of powdered samples, comprising the following steps:

[0052] The feed cylinder 9 containing the powder sample is mounted on the hanger 8. The slider 5 drives the movable cylinder 7 to move laterally to the feed position 42 until the top opening of the movable cylinder 7 is aligned with the bottom opening of the feed cylinder 9. The third sealing plate 91 and the top first sealing plate 71 are opened, and the powder in the feed cylinder 9 falls into the movable cylinder 7. The slider 5 then drives the movable cylinder 7 to move laterally to the weighing position 41, and the first mass value is obtained. The slider 5 then drives the movable cylinder 7 to move laterally to the discharge position 43, and the bottom opening of the movable cylinder 7 is aligned with the top opening of the scale cylinder 3. The second sealing plate 31 and the bottom first sealing plate 71 are opened, and the powder in the movable cylinder 7 falls into the scale cylinder 3. The slider 5 then drives the movable cylinder 7 to move laterally to the weighing position 41, and the second mass value is obtained. The difference between the first mass value and the second mass value is the actual mass of the powder sample tested by vibration. Combined with the volume value read from the scale cylinder 3, the final tap density of the sample tested is obtained.

[0053] In an embodiment of the present invention, the movable measuring cylinder 7 includes a straight cylinder section 701 at the upper and lower ends and an inclined cylinder section 702 in the middle. The straight cylinder sections 701 at the upper and lower ends are staggered and are rotatably connected. Two sets of vibrating seats 2 are spaced apart along the top of the main body 1 of the detector. After the measuring cylinder 3 on one side discharges material for testing, the inclined cylinder section 702 and the straight cylinder section 701 at the lower end are rotated 180°. The movable measuring cylinder 7 is then moved laterally to the feeding position 42 by the slider 5 for secondary feeding. It is then moved laterally to the weighing position 41 for secondary weighing. The movable measuring cylinder 7 is then moved laterally to the discharge position 43 by the slider 5. The straight cylinder section 701 at the lower end is facing the measuring cylinder 3 on the other side for discharge testing. This allows for two batch testing of the powder sample in the feeding measuring cylinder 9, which is beneficial for more reliable verification of the tapped density.

[0054] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A device for detecting the tap density of powdered samples, comprising a detector body (1), wherein a vibration seat (2) is provided at the top of the detector body (1), and a scale measuring cylinder (3) is connected to the vibration seat (2) for driving the scale measuring cylinder (3) to vibrate and detect, characterized in that: A weighing platform (4) is mounted on the top of the main body (1) of the detector. A slider (5) is slidably connected on the weighing platform (4). A movable measuring cylinder (7) is connected to the slider (5) through a weighing mechanism (6). In the initial state, the slider (5) is located at the weighing position (41) on the weighing platform (4). A feeding position (42) and a discharging position (43) are respectively provided on both sides of the weighing position (41) on the weighing platform (4). The top and bottom openings of the movable measuring cylinder (7) are elastically connected to a first sealing plate (71), and the top opening of the scale measuring cylinder (3) is elastically connected to a second sealing plate (31). In the initial state, the first sealing plate (71) is in a state of closing the top and bottom openings of the movable measuring cylinder (7), and the second sealing plate (31) is in a state of closing the top opening of the scale measuring cylinder (3). A hanging bracket (8) is mounted above the weighing platform (4). A feeding cylinder (9) is connected to the hanging bracket (8). A third sealing plate (91) is elastically connected to the bottom opening of the feeding cylinder (9). In the initial state, the third sealing plate (91) is in a closed state of the bottom opening of the feeding cylinder (9). When the movable cylinder (7) is moved laterally to the feeding position (42) by the slider (5), the top opening of the movable cylinder (7) is aligned with the bottom opening of the feeding cylinder (9). The third sealing plate (91) and the first sealing plate (71) at the top are opened. When the movable cylinder (7) is moved laterally to the discharge position (43) by the slider (5), the bottom opening of the movable cylinder (7) is aligned with the top opening of the scale cylinder (3). The second sealing plate (31) and the first sealing plate (71) at the bottom are opened. The first sealing plate (71) is slidably connected to the top and bottom openings of the movable measuring cylinder (7), and a first elastic element (72) is connected between it and the movable measuring cylinder (7) to drive the first sealing plate (71) to slide into an initial closed state. The second sealing plate (31) is slidably connected to the top opening of the scale measuring cylinder (3), and a second elastic element (32) is connected between it and the scale measuring cylinder (3) to drive the second sealing plate (31) to slide into an initial closed state. The third sealing plate (91) is slidably connected to the bottom opening of the feed measuring cylinder (9), and a third elastic element (92) is connected between it and the feed measuring cylinder (9) to drive the third sealing plate (91) to slide into an initial closed state. One side of the first sealing plate (71) extends beyond the side of the movable measuring cylinder (7). A second push plate (3) is fixedly connected to the second sealing plate (31). 3) A third push plate (93) is fixedly connected to the third sealing plate (91). Push rods (10) are fixedly connected to the side ends of the feed cylinder (9) and the scale cylinder (3). When the movable cylinder (7) moves laterally to the feed position (42), the side end of the movable cylinder (7) pushes the third push plate (93), and at the same time, the push rod (10) pushes the first sealing plate (71) at the top end beyond one side end of the movable cylinder (7), so that the third sealing plate (91) and the first sealing plate (71) at the top end open synchronously. When the movable cylinder (7) moves laterally to the discharge position (43), the side end of the movable cylinder (7) pushes the second push plate (33), and at the same time, the push rod (10) pushes the first sealing plate (71) at the bottom end beyond one side end of the movable cylinder (7), so that the second sealing plate (31) and the first sealing plate (71) at the bottom end open synchronously.

2. The device for detecting the tap density of powdered samples according to claim 1, characterized in that, The weighing platform (4) is provided with a horizontal sliding groove (44), and the slider (5) is slidably connected in the horizontal sliding groove (44).

3. The device for detecting the tap density of powdered samples according to claim 1, characterized in that, The movable measuring cylinder (7) includes a straight cylinder section (701) at the upper and lower ends and an inclined cylinder section (702) in the middle. The straight cylinder section (701) at the upper and lower ends is staggered. The straight cylinder section (701) and the inclined cylinder section (702) are designed to be rotatably connected. The vibrating seat (2) is provided with two sets at intervals along the top of the main body (1) of the detector. By turning the inclined cylinder section (702) and the straight cylinder section (701) at the lower end, it is used to discharge materials to the two sets of graduated measuring cylinders (3) respectively.

4. The device for detecting the tap density of powdered samples according to claim 3, characterized in that, An inner cylinder (703) is elastically connected inside the straight cylinder (701). One side of the head end of the inner cylinder (703) is designed with an inclined end face. When the first sealing plate (71) is opened, the head end of the inner cylinder (703) pops out of the straight cylinder (701). The side end of the higher side of the inner cylinder (703) abuts against the inner wall of the feed measuring cylinder (9) or the inner wall of the scale measuring cylinder (3), and the side end of the lower side of the inner cylinder (703) abuts against the side end of the first sealing plate (71).

5. The device for detecting the tap density of powdered samples according to claim 3, characterized in that, The straight cylindrical part (701) has a hanging ear (11) on one side end, and a limit ring (12) is connected to the detection end of the weighing mechanism (6) for directional hanging of the hanging ear (11).

6. The device for detecting the tap density of powdered samples according to claim 1, characterized in that, The feed cylinder (9) includes an upper flared section (901) and a lower straight section (902). One end of the bracket (8) is provided with a limiting port (13). The inner diameter of the limiting port (13) matches the outer diameter of the straight section (902) and is used to position and fit the straight section (902).

7. The device for detecting the tap density of powdered samples according to claim 6, characterized in that, A locking bolt (14) is connected to the side end of the limiting port (13). One end of the locking bolt (14) is inserted into the limiting port (13) to abut against the straight opening (902).

8. A method for detecting the tap density of a powdered sample, wherein the method uses the powdered sample tap density detection device as described in any one of claims 1-7, characterized in that, Includes the following steps: The feed cylinder (9) containing the powder sample is mounted on the hanger (8). The movable cylinder (7) is moved laterally to the feed position (42) by the slider (5) until the top opening of the movable cylinder (7) is aligned with the bottom opening of the feed cylinder (9). The third sealing plate (91) and the top first sealing plate (71) are opened, and the powder in the feed cylinder (9) falls into the movable cylinder (7). The movable cylinder (7) is then moved laterally to the weighing position (41) by the slider (5) to obtain the first mass value. The movable cylinder (7) is then moved laterally by the slider (5). The bottom opening of the movable measuring cylinder (7) is aligned with the top opening of the graduated measuring cylinder (3) at the discharge position (43). The second sealing plate (31) and the first sealing plate (71) at the bottom are opened, and the powder in the movable measuring cylinder (7) falls into the graduated measuring cylinder (3). The movable measuring cylinder (7) is then moved horizontally to the weighing position (41) by the slider (5). The second mass value is obtained by weighing. The difference between the first mass value and the second mass value is the mass of the powder sample actually tested by vibration. Combined with the volume value read from the graduated measuring cylinder (3), the vibration density of the tested sample is finally obtained.

9. The method for detecting the tap density of a powdered sample according to claim 8, characterized in that, The movable measuring cylinder (7) includes a straight cylinder section (701) at the top and bottom and an inclined cylinder section (702) in the middle. The straight cylinder section (701) at the top and bottom is staggered. The straight cylinder section (701) and the inclined cylinder section (702) are designed to rotate. The vibrating seat (2) is arranged in two sets at intervals along the top of the main body (1) of the detector. After the measuring cylinder (3) on one side discharges material for detection, the inclined cylinder section (702) and the straight cylinder section (702) at the bottom are connected. 701) Turn 180°, and drive the movable measuring cylinder (7) to move laterally to the feeding position (42) through the slider (5) for secondary feeding, and then move laterally to the weighing position (41) for secondary weighing, and then drive the movable measuring cylinder (7) to move laterally to the discharge position (43) through the slider (5). The lower straight cylinder (701) is directly opposite the scale measuring cylinder (3) on the other side for discharge detection, so as to realize the two batch detection of powder samples in the feeding measuring cylinder (9).