CN219551596U - Coriolis scale - Google Patents

Abstract

The utility model discloses a coriolis balance, which comprises a metering bin, a measuring disc and a driving device, wherein the measuring disc is positioned in the metering bin; the coriolis scale further comprises an inflatable fluidization unit, the inflatable fluidization unit is close to the discharging bin, and the inflatable fluidization unit sprays gas into the discharging bin to prevent materials from caking.

Description

Coriolis scale

Technical Field

The utility model relates to a powder flow metering device, in particular to a coriolis scale.

Background

In the process of transporting or transporting powdery materials, it is sometimes necessary to accurately meter the materials. For example, in order to precisely control the furnace temperature, precise control of the amount of pulverized coal to be conveyed is required, and precise metering of the amount of pulverized coal is required. When loading bulk powder transport vehicles, in order to ensure that the approved loading quantity is achieved, time is wasted by overweight fine or unfilled return reloading, and accurate metering of the loading quantity is also required. The powder mass flowmeter mainly comprises a synchronous belt balance, a weightlessness balance, a rotor balance, an impact flowmeter, a Coriolis flowmeter and the like, wherein the measurement precision of the synchronous belt balance and the rotor balance is not high, and the weightlessness balance and the impact flowmeter have the problem of impact and measurement cusp in application. Among them, coriolis scales are the most commonly used devices for measuring the mass of powdery materials and are considered to be the more advanced measuring scales at present.

The principle of operation of the coriolis scale is as follows: according to the description that the object is subjected to the action of Coriolis force when moving in a uniform rotation reference system, the measuring disc rotates at high speed under the drive of the motor spindle, the material to be measured falls to the center of the measuring disc, changes the flow direction through the material dividing cone, is captured by the blades, and moves along the radial outer edge under the action of centrifugal force. During the movement, the material is subjected to radial friction and reverse centrifugal force, and tangential coriolis force causes a reaction movement moment, while friction and centrifugal force do not generate reaction moment on the driving shaft. The mass flow of the material can be obtained by measuring the moment of action of the coriolis force on the measuring disc.

The utility model CN202066542U discloses a Coriolis weighing scale, wherein a driving device for driving a main shaft is arranged at the top of a weighing bin, an output shaft of the driving device is coaxially arranged with the main shaft, the driving device is assembled on the weighing bin through a fixing frame, a torque sensor which is a sensor detection device and is in transmission connection with the main shaft is fixedly assembled in the fixing frame, a measuring disc is fixedly connected at the lower end of the main shaft, and a plurality of blades are arranged on the circumference of the measuring disc. The driving device of the weighing scale is coaxially arranged with the main shaft and is positioned right above the main shaft, so that the feeding hole is arranged at a position deviating from the center of the weighing bin. When the material enters the metering bin from the feed inlet, the material can fall on the position of the measuring disc, which deviates from the center, so that the unbalanced load phenomenon of the measuring disc can be caused to cause unstable operation and reduce the metering precision.

The utility model CN205228548U discloses a Coriolis weighing scale, a force transmission mechanism of the weighing scale is arranged above a main platform, and a motor drives a driven wheel in a weighing bin to transmit power through a synchronous belt, so that a scale body is overhigh. In addition, the powder material to be metered by the metering scale falls freely and passes through the conical discharging bin, and the blocking phenomenon can occur.

In view of the above technical problems, the present utility model is particularly directed.

Disclosure of Invention

The main purpose of the utility model is to provide a coriolis balance, which is used for solving the problems of overhigh balance body and material clamping in the existing design.

In order to achieve the above purpose, the utility model provides a coriolis balance, which comprises a measuring bin, a measuring disc and a driving device, wherein the measuring disc is positioned in the measuring bin, the driving device drives the measuring disc to rotate, the measuring bin comprises a discharging bin positioned at the lower end of the measuring bin, and materials are discharged from the discharging bin after being measured by the measuring bin;

the coriolis scale further comprises an inflatable fluidization unit, the inflatable fluidization unit is close to the discharging bin, and the inflatable fluidization unit sprays gas into the discharging bin to prevent materials from caking.

Further, the aeration fluidization unit comprises an aeration tank with one opening end and a side wall with a porous structure, wherein the side wall is positioned at the opening end of the aeration tank, and the side wall is positioned at the middle position close to the discharging bin relative to the aeration tank.

Further, the wall surface of the discharging bin is provided with a mounting opening, the side wall is positioned on the mounting opening, and the air charging box is connected with the discharging bin at the mounting opening.

Further, an air inlet is formed in the air charging box, the air inlet is located at the opposite side of the side wall, and air flow enters the air charging box through the air inlet and flows out of the air charging box through the side wall.

Further, the device comprises at least two aeration fluidization units, wherein the aeration fluidization units are oppositely arranged on the wall surface of the discharging bin.

Further, the weighing machine further comprises a weighing frame, wherein the weighing frame is connected with the metering bin and is positioned above the discharging bin, and the driving device is integrated below the weighing frame.

Further, the measuring device also comprises a main shaft and a gear box, wherein the main shaft and the gear box are both positioned in the measuring bin, and the driving device drives the main shaft through the gear box to drive the measuring disc to rotate.

Further, the driving device comprises a driving shaft, a transmission assembly and a transmission shaft, the driving shaft is positioned outside the metering bin, the transmission assembly is positioned below the weighing frame, the transmission shaft penetrates through the weighing frame to be connected with the gear box, and the driving shaft is driven by the motor and drives the transmission shaft to rotate through the transmission assembly.

Further, the transmission assembly comprises a driving wheel, a transmission belt and a driven wheel, wherein the driving wheel is arranged on the driving shaft, the driven wheel is arranged on the transmission shaft, and the driving wheel is connected with the driven wheel through the transmission belt.

Further, the driven wheel is positioned in the discharging bin.

Further, the axes of the driving shaft, the transmission shaft and the main shaft are parallel to each other and are positioned on the same plane.

By applying the technical scheme of the utility model, at least the following beneficial effects are realized:

1. according to the utility model, the inflatable fluidization unit is designed at the discharging bin, so that high-pressure gas can be blown into the powdery material in the conical discharging bin to assist in flowing, and the powdery material is prevented from caking, so that the discharging is smoother, and the phenomenon of clamping the coriolis scale is avoided.

2. According to the utility model, through designing the side wall with the porous structure in the aeration fluidization unit, airflow fluidization is realized, the fluidity is increased, and the impact abrasion of materials on the inner wall of the conical discharging bin is reduced.

3. According to the utility model, the driving device is integrated below the scale frame, in particular, the transmission component is arranged below the scale frame, and part of the transmission component is arranged in the discharging bin, so that the height of the scale body of the Coriolis scale is reduced, the scale body is more compact, and the whole volume is reduced.

4. According to the utility model, by designing the lower scale height, the path of the powder material flowing through the scale body is reduced, so that the heat generated by friction between the powder material and the scale body is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 illustrates a front view of a coriolis scale of an embodiment of the present utility model;

FIG. 2 illustrates a side view of a coriolis scale of an embodiment of the present utility model;

FIG. 3 shows a cross-sectional view of an inflatable fluidization unit of an embodiment of the utility model;

fig. 4 shows a partial cross-sectional view of a coriolis scale of an embodiment of the utility model.

Wherein the above figures include the following reference numerals:

1. a metering bin; 11. a feed inlet; 12. discharging the material bin; 13. a mounting port; 2. a measuring disc; 3. a main shaft; 4. a driving device; 41. a drive shaft; 42. a transmission assembly; 43. a transmission shaft; 44. a driving wheel; 45. a transmission belt; 46. driven wheel; 47. a motor; 5. an aeration fluidization unit; 51. an air charging box; 52. a sidewall; 53. an air inlet; 6. a scale rack; 7. a gear box; 8. a sensor unit; 81. a force sensor; 82. a sensing fixing seat; 83. a pull rod; 84. a knuckle bearing; 85. a pin shaft; 86. a force measuring ring.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The utility model is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the utility model as claimed. The term "comprising" when used indicates the presence of a feature, but does not preclude the presence or addition of one or more other features; the positional or positional relationship indicated by the terms "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., are based on the positional or positional relationship shown in the drawings, are for convenience of description only, and are not indicative or implying that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model; furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description, unless clearly indicated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

Examples:

the utility model provides a Coriolis scale, which mainly comprises a measuring bin 1, a measuring disc 2 and a driving device 4, wherein the measuring disc 2 is positioned in the measuring bin 1, and the driving device 4 is used for driving the measuring disc 2 to rotate. The metering bin 1 comprises a feed inlet 11 at its upper end and a discharge bin 12 at its lower end. In this embodiment, the feed opening 11 is fixed to the upper end of the measuring chamber 1 and is located directly above the measuring disk 2. A wear-resistant sloping plate is also arranged in the measuring bin 1 at the same height as the measuring disc 2. The powdery material enters through the feed inlet 11 and falls into the measuring disc 2, and after the measurement is completed, the powdery material falls into the discharge bin 12 with the lower end in a conical shape in the measuring bin and is discharged.

As shown in fig. 1 and 2, the coriolis scale provided by the utility model further comprises an aeration and fluidization unit 5, wherein the aeration and fluidization unit 5 is positioned close to the discharge bin 12, and the aeration and fluidization unit 5 sprays gas into the discharge bin 12 to prevent materials from caking.

Specifically, as shown in fig. 3, the aeration-fluidization unit 5 includes an aeration tank 51 having one end opened and a side wall 52 having a porous structure, the side wall 52 being located at the opened end of the aeration tank 51, the side wall 52 being located at an intermediate position with respect to the aeration tank 51 near the discharge bin 12. So that the gas in the gas tank 51 can flow through the side wall 52 back to the powder material inside the discharge bin 12.

According to the utility model, the inflatable fluidization unit is designed at the discharging bin, so that high-pressure gas can be blown into the powdery material in the conical discharging bin to assist in flowing, and the powdery material is prevented from caking, so that the discharging is smoother, and the phenomenon of clamping the coriolis scale is avoided.

In addition, the plenum 51 is provided with an air inlet 53, the air inlet 53 being located on the opposite side of the side wall 52, and air flow enters the plenum 51 through the air inlet 53 and exits the plenum 51 through the side wall 52. The coriolis scale may be externally connected to a high pressure air gun or air tube, which is inserted over the air inlet 53.

A mounting opening 13 can be arranged on the wall surface of the discharging bin 12, a side wall 52 is arranged on the mounting opening 13, and an air charging box 51 is arranged at the mounting opening 13 and is connected with the discharging bin 12. Preferably, in the present embodiment, the aeration-fluidization unit 5 is installed on the wall surface of the discharge bin 12 and is located on the side wall of the discharge guide path of the tapered discharge bin. I.e. the side wall 52 is located at the wall surface of the discharge bin 12, and the air box 51 is located outside the discharge bin 12 and is bolted to the outer wall surface of the discharge bin. In other embodiments of the utility model, the side wall 52 may be located inside the discharge bin 12 or may be located outside the discharge bin 12.

Further preferably, the side wall 52 is made of a breathable material, such as breathable cloth, and the breathable cloth is covered on the outer wall surface of the discharging bin 12, the shape of the air box 51 is adapted to the wall surface of the discharging bin, and the breathable cloth is covered on the air box.

According to the utility model, through designing the side wall with the porous structure in the aeration fluidization unit, airflow fluidization is realized, the fluidity is increased, and the impact abrasion of materials on the inner wall of the conical discharging bin is reduced.

In this embodiment, the coriolis scale comprises at least two aeration fluidization units 5, the aeration fluidization units 5 being arranged opposite each other on the wall surface of the discharge bin 12. Preferably, as shown in fig. 1-2, the two aeration fluidization units 5 are radially symmetrical on the wall surface of the discharge bin, and can blow air into the discharge bin from opposite directions.

As shown in fig. 1, the coriolis scale further includes a scale frame 6, where the scale frame 6 is connected to the measuring bin 1 and located above the discharging bin 12, and the driving device 4 is integrated below the scale frame 6.

In addition, the coriolis balance further comprises a main shaft 3 and a gear box 7, wherein the main shaft 3 and the gear box 7 are both positioned in the metering bin 1, and the driving device 4 drives the main shaft 3 through the gear box 7 so as to drive the measuring disc 2 to rotate. The gear box 7 is fixed on the upper side of the scale frame 6, and the spindle 3 passes through the gear box 7 and is fixed on the gear box 7. The spindle 3 is directly or indirectly connected to the measuring disk 2.

Preferably, the feed inlet 11, the measuring disc 2, the main shaft 3, the metering bin 1 and the discharge bin 12 are all coaxially arranged. The material can uniformly pass through the metering bin, and the problems of unbalanced load of the measuring disc and the like are prevented.

The driving device 4 comprises a driving shaft 41, a transmission assembly 42 and a transmission shaft 43, wherein the driving shaft 41 is positioned outside the metering bin 1, the transmission assembly 42 is positioned below the scale frame 6, the transmission shaft 43 penetrates through the scale frame 6 to be connected with the gear box 7, and the driving shaft 41 is driven by a motor 47 and drives the transmission shaft 43 to rotate through the transmission assembly 42. Preferably, the motor 47 is fixed to the scale frame 6 by a motor base and is tensioned by the motor base.

Specifically, the transmission assembly 42 includes a driving pulley 44, a transmission belt 45, and a driven pulley 46, the driving pulley 44 is provided on the driving shaft 41, the driven pulley 46 is provided on the transmission shaft 43, and the driving pulley 44 and the driven pulley 46 are connected by the transmission belt 45. The driven wheel 46 is located within the discharge bin 12,

according to the utility model, the driving device is integrated below the scale frame, in particular, the transmission component is arranged below the scale frame, and part of the transmission component is arranged in the discharging bin, so that the height of the scale body of the Coriolis scale is reduced, the scale body is more compact, and the whole volume is reduced. In addition, through designing lower balance height, reduce the route that powder material flow path balance body to reduce the heat that powder material and balance body friction take place.

Preferably, the axes of the drive shaft 41, the transmission shaft 43 and the main shaft 3 are parallel to each other and lie on the same plane. It is further preferred that the two aeration fluidization units 5 are radially symmetrical on the wall of the discharge bin, the radial direction being perpendicular to the plane in which the three axes lie.

In the present embodiment, a sensor unit 8 for detecting the resistance torque applied to the spindle 3 is mounted at the rear end of the gear case 7. As shown in fig. 4, the sensor unit 8 includes a force sensor 81, a sensor holder 82, a tie rod 83, a knuckle bearing 84, a pin 85, and a load ring 86. The force sensor 81 is fixed on the sensing fixed seat 82, the sensing fixed seat 82 is fixed on the gear box, the force measuring end of the force sensor 81 is fixed with the pull rod 83, and the pull rod 83 is connected with the force measuring ring 86 through the knuckle bearing 84 and the pin shaft 85.

Specifically, in the gear box 7, the transmission shaft 43 and the spindle 3 are respectively connected with a transmission gear and a spindle gear, a planetary gear is arranged between the transmission gear and the spindle gear, the planetary gear is rotationally assembled on the planetary carrier, under the action of the planetary carrier, the planetary gear can rotate around the axis of the planetary carrier and revolve around the axis of the spindle, under the condition that the spindle is empty, the planetary carrier is fixed, the planetary gear rotates, when the spindle is loaded, namely receives resistance torque, the planetary carrier and the planetary gear have a motion trend of rotating around the axis of the spindle, and the sensor unit 8 can lock the planetary carrier and can detect the resistance torque received by the spindle.

In summary, from the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: 1. according to the utility model, the inflatable fluidization unit is designed at the discharging bin, so that high-pressure gas can be blown into the powdery material in the conical discharging bin to assist in flowing, and the powdery material is prevented from caking, so that the discharging is smoother, and the phenomenon of clamping the coriolis scale is avoided. 2. According to the utility model, through designing the side wall with the porous structure in the aeration fluidization unit, airflow fluidization is realized, the fluidity is increased, and the impact abrasion of materials on the inner wall of the conical discharging bin is reduced. 3. According to the utility model, the driving device is integrated below the scale frame, in particular, the transmission component is arranged below the scale frame, and part of the transmission component is arranged in the discharging bin, so that the height of the scale body of the Coriolis scale is reduced, the scale body is more compact, and the whole volume is reduced. 4. According to the utility model, by designing the lower scale height, the path of the powder material flowing through the scale body is reduced, so that the heat generated by friction between the powder material and the scale body is reduced.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (11)

1. The Coriolis scale comprises a metering bin (1), a measuring disc (2) and a driving device (4), wherein the measuring disc (2) is positioned in the metering bin (1), the driving device (4) drives the measuring disc (2) to rotate, the metering bin (1) comprises a discharging bin (12) positioned at the lower end of the metering bin, and materials are discharged from the discharging bin (12) after being metered by the metering bin (1); the method is characterized in that: the Coriolis scale further comprises an inflatable fluidization unit (5), the inflatable fluidization unit (5) is close to the discharging bin (12), and the inflatable fluidization unit (5) sprays gas into the discharging bin (12) to prevent materials from caking.

2. The coriolis scale of claim 1 characterized in that: the aeration fluidization unit (5) comprises an aeration tank (51) with one end open and a side wall (52) with a porous structure, wherein the side wall (52) is positioned at the open end of the aeration tank (51), and the side wall (52) is positioned at the middle position close to the discharging bin (12) relative to the aeration tank (51).

3. The coriolis scale of claim 2 characterized in that: the wall surface of the discharging bin (12) is provided with a mounting opening (13), the side wall (52) is positioned on the mounting opening (13), and the air charging box (51) is connected with the discharging bin (12) at the mounting opening (13).

4. A coriolis scale of claim 3 characterized in that: the air inlet (53) is arranged on the air charging box (51), the air inlet (53) is arranged on the opposite side of the side wall (52), and air flow enters the air charging box (51) through the air inlet (53) and flows out of the air charging box (51) through the side wall (52).

5. The coriolis scale of claim 4 characterized in that: comprises at least two aeration fluidization units (5), wherein the aeration fluidization units (5) are oppositely arranged on the wall surface of the discharging bin (12).

6. The coriolis scale of claim 1 characterized in that: the automatic weighing machine further comprises a weighing frame (6), wherein the weighing frame (6) is connected with the metering bin (1) and is positioned above the discharging bin (12), and the driving device (4) is integrated below the weighing frame (6).

7. The coriolis scale of claim 6 characterized in that: the measuring device is characterized by further comprising a main shaft (3) and a gear box (7), wherein the main shaft (3) and the gear box (7) are both positioned in the measuring bin (1), and the driving device (4) drives the main shaft (3) through the gear box (7) so as to drive the measuring disc (2) to rotate.

8. The coriolis scale of claim 7 characterized in that: the driving device (4) comprises a driving shaft (41), a transmission assembly (42) and a transmission shaft (43), wherein the driving shaft (41) is positioned outside the metering bin (1), the transmission assembly (42) is positioned below the scale frame (6), the transmission shaft (43) penetrates through the scale frame (6) to be connected with the gear box (7), and the driving shaft (41) is driven by a motor (47) and drives the transmission shaft (43) to rotate through the transmission assembly (42).

9. The coriolis scale of claim 8 characterized in that: the transmission assembly (42) comprises a driving wheel (44), a transmission belt (45) and a driven wheel (46), wherein the driving wheel (44) is arranged on the driving shaft (41), the driven wheel (46) is arranged on the transmission shaft (43), and the driving wheel (44) and the driven wheel (46) are connected through the transmission belt (45).

10. The coriolis scale of claim 9 characterized in that: the driven wheel (46) is positioned in the discharging bin (12).

11. Coriolis scale of any one of claims 8-10 characterized in that: the axes of the driving shaft (41), the transmission shaft (43) and the main shaft (3) are parallel to each other and are positioned on the same plane.