Weighing device and modified plastic extrusion system

Abstract

The utility model discloses a weighing device and a modified plastic extrusion system, and belongs to the technical field of modified plastic production. The weighing device comprises a weighing barrel, a cantilever beam type weighing sensor, a weighing rod, a movable pin, a sensor support, two weighing rod supports and two weighing rod cone feet, the weighing barrel is hung on the weighing rod through the movable pin and can rotate around the movable pin, and the movable pin horizontally penetrates through the top of the weighing barrel and intersects with the plumb line of the weighing barrel; the weighing rod comprises a V-shaped arm and two straight arms at the two ends of the V-shaped arm. The center line of the V-shaped arm is perpendicular to the movable pin, and the opening of the V-shaped arm faces the weighing barrel. The two straight arms are located on the adjacent outer sides of the two sides of the weighing barrel respectively, and the two ends of the movable pin are arranged on the two straight arms respectively. The cantilever beam type weighing sensor is arranged on the sensor bracket, and a mounting support leg on the lower side of the cantilever beam type weighing sensor is fixed on the upper side of the vertex angle of the V-shaped arm; the two weighing rod cone feet are respectively fixed on the lower sides of the two arms of the V-shaped arm, the tips of the two weighing rod cone feet are respectively arranged on the tops of the two weighing rod supports, and the straight line where the two weighing rod cone feet are located is parallel to the movable pin.

Description

Technical Field

[0001] The utility model belongs to the technical field of modified plastic production, in particular to a weighing device and an extrusion system of modified plastic. Background Art

[0002] Plastics used for insulation and sheathing of wires and cables are commonly known as modified plastics, which include rubber, plastic, nylon and other varieties. Modified plastics manufacturers use cable manufacturers as users. As long as there is demand for wires and cables, there is a market for modified plastics. Almost all wire and cable products require an insulation layer, except for bare wire products such as steel core aluminum stranded wire and magnet wire.

[0003] The production process of modified plastics is: weighing each raw material, mixing according to the ratio, extruding to obtain the masterbatch, cooling and screening, etc. For example, the patent with application number CN202310236117.9 discloses a prefabricated device for weighing and mixing modified plastics, including a hopper, a weighing scale, a high-speed mixer and a sensor. The hopper, the weighing scale and the high-speed mixer are independent devices and can be operated separately. There are multiple hoppers and the discharge ends are all located above the feed end of the weighing scale. The discharge end of the weighing scale is located above the feed end of the high-speed mixer. There are multiple sensors and they are connected to the discharge ends of the hopper and the weighing scale through electronic components. The feed end of the hopper is connected to the feed module.

[0004] That is, the production of modified plastics requires the use of a weighing device to weigh each raw material and then add it to the high-speed mixer in proportion. Figure 1 As shown, the existing modified plastic extrusion system includes a hopper 14, a weighing device 13, a high-speed mixer 12 and an extruder 11, etc., which are arranged in sequence from top to bottom. The existing weighing device includes a vertically arranged weighing bucket and three weighing sensors, etc. The three weighing sensors are all arranged on the outer wall of the weighing bucket and are evenly distributed around the weighing bucket. The weighing bucket is suspended on a corresponding bracket or floor slab through the three weighing sensors.

[0005] When the applicant used the aforementioned weighing device, he discovered the following problems: three weighing sensors were required, which needed to be calibrated after being used for a period of time or when the detection data of the three weighing sensors differed by more than a preset value (basically, the deviation of the three weighing sensors was greater than the preset value every few days and needed to be calibrated). The workload of calibrating the three weighing sensors was large (at the same time, the weighing barrel needed to be disassembled and assembled, which was also a large workload and required production to be stopped). Summary of the invention

[0006] In order to solve the above problems, the embodiment of the utility model provides a weighing device and a modified plastic extrusion system. The weighing device only uses a cantilever beam weighing sensor, which reduces the workload of calibration and the number of calibrations while realizing the weighing function. The technical solution is as follows:

[0007] On the one hand, the embodiment of the utility model provides a weighing device, which includes a vertically arranged weighing bucket 1, a cantilever beam weighing sensor 2, a weighing rod 3, a movable pin 4, a sensor bracket 5, two weighing rod brackets 6 and two weighing rod cone feet 7, the weighing bucket 1 is suspended on the weighing rod 3 by the movable pin 4 and can rotate around the movable pin 4, the movable pin 4 horizontally passes through the top of the weighing bucket 1 and intersects with the vertical line of the weighing bucket 1, the sensor bracket 5 is located next to the weighing bucket 1, and the weighing rod bracket 6 is located between the weighing bucket 1 and the sensor bracket 5; the weighing rod 3 includes a horizontally arranged V-shaped arm 31 and two straight arms 32 at both ends thereof, the midline of the V-shaped arm 31 is aligned with the movable pin 4 Vertically, with its opening facing the weighing bucket 1; two straight arms 32 are symmetrically arranged with respect to the center line of the V-shaped arm 31, and are respectively located at the adjacent outer sides on both sides of the weighing bucket 1, and are parallel to the center line of the V-shaped arm 31; the two ends of the movable pin 4 are respectively arranged on the two straight arms 32; the cantilever beam type weighing sensor 2 is arranged on the sensor bracket 5, and the mounting feet 8 on the lower side are fixed on the upper side of the top angle of the V-shaped arm 31; two weighing rod brackets 6 are respectively located directly below the two arms of the V-shaped arm 31, and the weighing rod cone feet 7 are arranged vertically downward; the two weighing rod cone feet 7 are respectively fixed on the lower sides of the two arms of the V-shaped arm 31, and their tips are respectively placed on the tops of the two weighing rod brackets 6, and the straight line where they are located is parallel to the movable pin 4.

[0008] The weighing barrel 1 in the embodiment of the utility model is a round barrel with a conical bottom located between two straight arms 32 , and a valve 9 is provided at the bottom thereof; the movable pin 4 is arranged along the radial direction of the weighing barrel 1 .

[0009] Among them, the sensor bracket 5 and the weighing beam bracket 6 in the embodiment of the utility model are both vertically arranged columns. The sensor bracket 5 is located on the side of the weighing beam 3 away from the weighing barrel 1. The cantilever beam weighing sensor 2 is arranged along the direction of the center line of the V-shaped arm 31, and the two weighing beam brackets 6 are symmetrically arranged about the center line of the V-shaped arm 31.

[0010] Specifically, the sensor bracket 5 in the embodiment of the utility model is a rectangular column, which is a hollow structure, and a notch 10 is provided on the top facing the weighing bucket 1; the cantilever beam weighing sensor 2 is detachably fixed to the top of the sensor bracket 5 and passes through the notch 10, and the mounting foot 8 is located outside the sensor bracket 5.

[0011] The weighing beam cone foot 7 in the embodiment of the utility model is a conical structure and is located at the lower side of one end of the V-shaped arm 31 away from the cantilever beam type weighing sensor 2 .

[0012] Among them, through holes cooperating with the movable pin 4 are provided on both sides of the weighing barrel 1 in the embodiment of the utility model; the movable pin 4 is a smooth round rod, which passes through the through hole, and its two ends are respectively fixed on the two straight arms 32.

[0013] Specifically, the model of the cantilever beam weighing sensor 2 in the embodiment of the utility model is Dayang DYX-301.

[0014] On the other hand, an embodiment of the utility model also provides an extrusion system for modified plastics, comprising a plurality of hoppers 14, a high speed mixer 12, an extruder 11 and the aforementioned weighing device 13, wherein the extruder 11 is located directly below the high speed mixer 12 and its feed port is connected to the feed port of the high speed mixer 12; the weighing device 13 is located between the high speed mixer 12 and the hoppers 14, and the plurality of hoppers 14 are all located directly above the weighing barrel 1, and the weighing barrel 1 is located directly above the feed port of the high speed mixer 12.

[0015] Among them, the extrusion system of the modified plastic in the embodiment of the utility model is arranged in four layers, the extruder 11 is located on the first layer, the high mixer 12 is located on the second layer, the weighing device 13 is located on the third layer, the hopper 14 is located on the fourth layer, the sensor bracket 5 and the weighing rod bracket 6 are both arranged on the third layer, and the weighing barrel 1 passes downward through the third layer.

[0016] Specifically, the number of the hoppers 14 in the embodiment of the utility model is three, and the three hoppers 14 are distributed in a triangle and are distributed around the axis of the weighing barrel 1 .

[0017] This patent has the following beneficial effects: The embodiment of the utility model provides a weighing device and a modified plastic extrusion system, the weighing device uses only one cantilever beam weighing sensor (even if there is an error, several substances are mixed in proportion, and the amount of several substances is too large or too small, as long as the error is not large, it can continue to be used), and the proofreading workload is reduced under the premise of realizing the weighing function (the cantilever beam weighing sensor of this patent needs to be proofread only after being used for a long time), the number of proofreading and disassembly and assembly times is reduced, and the downtime is reduced. In addition, the cantilever beam weighing sensor of this patent is easy to remove and install (the weighing rod needs to be slightly tilted). BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an existing modified plastic extrusion system;

[0019] Figure 2 It is a structural schematic diagram of a weighing device in an embodiment of the utility model;

[0020] Figure 3 is a top view of the weighing device in the embodiment of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the combination of the sensor bracket and the cantilever beam type weighing sensor;

[0022] Figure 5It is a structural schematic diagram of the extrusion system of the modified plastic in the embodiment of the utility model.

[0023] In the figure: 1 weighing barrel, 2 cantilever beam type weighing sensor, 3 weighing rod, 4 movable pin, 5 sensor bracket, 6 weighing rod bracket, 7 weighing rod cone foot, 8 mounting foot, 9 valve, 10 notch, 11 extruder, 12 high mixer, 13 weighing device, 14 hopper, 15 floor;

[0024] 31 V-shaped arm, 32 straight arm. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] See also Figure 1-4 Embodiment 1 provides a weighing device, which includes a weighing bucket 1, a cantilever beam weighing sensor 2, a weighing rod 3, a movable pin 4, a sensor bracket 5, two weighing rod brackets 6 and two weighing rod cone feet 7, etc.

[0028] The weighing barrel 1 is a vertically arranged round barrel with a conical bottom, which is located between the two straight arms 32 of the weighing rod 3, and a valve 9 is provided at the bottom thereof, through holes (specifically round holes) are provided on both sides thereof to cooperate with the movable pin 4, and the bottom thereof passes downward through the floor 15 (specifically the third floor in Embodiment 5). The weighing barrel 1 is suspended on the weighing rod 3 by the movable pin 4 and can rotate around the movable pin 4.

[0029] The movable pin 4 horizontally penetrates the top of the weighing bucket 1 and intersects with the gravity vertical line of the weighing bucket 1. Specifically, the movable pin 4 is a smooth round rod, which passes through the through hole, and its two ends are respectively fixed on the two straight arms 32 of the weighing rod 3, and it is arranged along the radial direction of the weighing bucket 1 (when the valve 9 does not affect the center of gravity of the weighing bucket 1 or the effect is small) or near the radial direction (to ensure that the weighing bucket 1 is arranged vertically). The movable pin 4 can also be composed of two colinear rotating shafts, which are respectively arranged on both sides of the weighing bucket 1 and are respectively arranged on the two straight arms 32.

[0030] The sensor bracket 5 is located beside the weighing bucket 1, and the weighing rod bracket 6 is located between the weighing bucket 1 and the sensor bracket 5. Specifically, the sensor bracket 5 and the weighing rod bracket 6 are both arranged on the floor 15. More specifically, the sensor bracket 5 and the weighing rod bracket 6 are both vertically arranged columns (specifically, the specifications are 80mm*80mm), and the sensor bracket 5 is located on the side of the weighing rod 3 away from the weighing bucket 1.

[0031] The weighing rod 3 includes a horizontally arranged V-shaped arm 31 and two straight arms 32 at both ends thereof, the V-shaped arm 31 and the two straight arms 32 are coplanar, the center line of the V-shaped arm 31 is perpendicular to the movable pin 4 and its opening faces the weighing bucket 1. The two straight arms 32 are symmetrically arranged with respect to the center line of the V-shaped arm 31, and are respectively located at adjacent outer sides of both sides of the weighing bucket 1 (preferably close to each other to ensure that the weighing bucket 1 can only rotate slightly), parallel to the center line of the V-shaped arm 31, and perpendicular to the movable pin 4.

[0032] The cantilever beam type weighing sensor 2 is arranged on the sensor bracket 5, and the mounting foot 8 on the lower side thereof (vertically arranged, being a structure provided by the cantilever beam type weighing sensor 2) is fixed on the upper side of the top angle of the V-shaped arm 31. Specifically, the cantilever beam type weighing sensor 2 is arranged along the direction where the center line of the V-shaped arm 31 is located. More specifically, the model of the cantilever beam type weighing sensor 2 is Dayang DYX-301.

[0033] Among them, the two weighing beam brackets 6 are respectively located directly below the two arms of the V-shaped arm 31, and are symmetrically arranged with respect to the midline of the V-shaped arm 31. The weighing beam cone foot 7 is arranged vertically downward, and is a conical structure. It is located at the lower side of one end of the V-shaped arm 31 away from the cantilever beam type weighing sensor 2, and is made of high-strength steel. The two weighing beam cone feet 7 are respectively fixed to the lower sides of the two arms of the V-shaped arm 31, and their tips are respectively placed at the tops of the two weighing beam brackets 6, and the straight line where they are located is parallel to the movable pin 4, and they are symmetrically arranged with respect to the midline of the V-shaped arm 31.

[0034] Example 2

[0035] See also Figure 1-4 Embodiment 2 provides a weighing device, and its structure is basically the same as that of Embodiment 1, except that: the movable pin 4 in this embodiment is arranged in the left-right direction and its left and right ends are respectively fixed to the rear ends of the two straight arms 32, the weighing rod 3 is located in front of the weighing barrel 1 and is arranged symmetrically, the V-shaped arm 31, the cantilever beam weighing sensor 2 and the straight arm 32 are all arranged in the front-back direction, the straight arm 32 is located at the rear end of the V-shaped arm 31, and the two straight arms 32 are respectively located on the left and right sides of the weighing barrel 1. The mounting foot 8 is arranged at the lower rear part of the cantilever beam weighing sensor 2 and is fixedly connected to the front end of the V-shaped arm 31. The weighing rod cone foot 7 is arranged at the lower rear part of the V-shaped arm 31.

[0036] Example 3

[0037] See also Figure 4, Embodiment 3 provides a weighing device, and its structure is basically the same as that of Embodiment 1, except that: the sensor bracket 5 in this embodiment is a rectangular column, which is a hollow structure, and a notch 10 is provided on the top of the side (specifically the rear side) facing the weighing barrel 1. The notch 10 is specifically a vertically arranged rectangular opening. The cantilever beam type weighing sensor 2 is detachably fixed to the top of the sensor bracket 5 and passes through the notch 10, and the mounting foot 8 (specifically located behind the sensor bracket 5) is located outside the sensor bracket 5. Specifically, a fixed bracket (arranged in the front-to-back direction) is provided on the front side of the sensor bracket 5 and located on the lower side of the cantilever beam type weighing sensor 2. The upper side of the cantilever beam type weighing sensor 2 is against the top of the sensor bracket 5 and is fixed by bolts, and the lower side is placed on the fixed bracket and fixed by bolts. The cantilever beam type weighing sensor 2 can be taken out from the notch backward by removing the bolts. The cantilever beam type weighing sensor 2 of this embodiment is easy to disassemble and convenient for calibration.

[0038] Example 4

[0039] See also Figure 3 Embodiment 4 provides a weighing device, the structure of which is substantially the same as that of Embodiment 1, except that the outer diameter of the weighing barrel 1 in this embodiment is 880 mm, the distance between the two straight arms 32 is 890 mm, the length of the straight arm 32 is 310 mm, the length of the two arms of the V-shaped arm 31 is 1000 mm, and the angle between them is 52.85°.

[0040] Example 5

[0041] See also Figure 5 Embodiment 5 provides an extrusion system for modified plastics, which includes a plurality of hoppers 14, a high-speed mixer 12, an extruder 11, and the aforementioned weighing device 13. The extruder 11 is located directly below the high-speed mixer 12, and its feed port is connected to the discharge port of the high-speed mixer 12. The weighing device 13 is located between the high-speed mixer 12 and the hopper 14, and the plurality of hoppers 14 are located directly above the weighing barrel 1, and the weighing barrel 1 is located directly above the feed port of the high-speed mixer 12. Among them, the extrusion system for modified plastics is arranged in four layers, the extruder 11 is located on the first layer, the high-speed mixer 12 is located on the second layer, the weighing device 13 is located on the third layer, the hopper 14 is located on the fourth layer, the sensor bracket 5 and the weighing rod bracket 6 are both arranged on the third layer, and the weighing barrel 1 passes downward through the third layer.

[0042] Specifically, the number of the hoppers 14 (with a specification of 300 kg) in the embodiment of the utility model is three, and the three hoppers 14 are distributed in a triangle (specifically an equilateral triangle) and are distributed around the axis of the weighing barrel 1 .

[0043] Among them, "first", "second", "third" and "fourth" in this patent only serve to distinguish and have no other special meanings.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A weighing device, comprising a weighing bucket (1) arranged vertically; characterized in that: The weighing device also comprises a cantilever beam weighing sensor (2), a weighing rod (3), a movable pin (4), a sensor bracket (5), two weighing rod brackets (6) and two weighing rod conical feet (7); the weighing barrel (1) is suspended on the weighing rod (3) through the movable pin (4) and can rotate around the movable pin (4); the movable pin (4) horizontally penetrates the top of the weighing barrel (1) and intersects with the vertical line of the weighing barrel (1); the sensor bracket (5) is located beside the weighing barrel (1); the weighing rod bracket (6) is located between the weighing barrel (1) and the sensor bracket (5); the weighing rod (3) comprises a horizontally arranged V-shaped arm (31) and two straight arms (32) at both ends thereof; the midline of the V-shaped arm (31) is perpendicular to the movable pin (4) and its opening faces the weighing barrel (1). 1); two straight arms (32) are symmetrically arranged with respect to the center line of the V-shaped arm (31), and are respectively located at adjacent outer sides of the two sides of the weighing barrel (1), and are parallel to the center line of the V-shaped arm (31); the two ends of the movable pin (4) are respectively arranged on the two straight arms (32); the cantilever beam type weighing sensor (2) is arranged on the sensor bracket (5), and the mounting support foot (8) on the lower side is fixed on the upper side of the top angle of the V-shaped arm (31); the two weighing rod brackets (6) are respectively located directly below the two arms of the V-shaped arm (31), and the weighing rod cone foot (7) is arranged vertically downward; the two weighing rod cone feet (7) are respectively fixed on the lower sides of the two arms of the V-shaped arm (31), and their tips are respectively placed on the tops of the two weighing rod brackets (6), and the straight line where they are located is parallel to the movable pin (4).

2. The weighing device according to claim 1, characterized in that: The weighing barrel (1) is a round barrel with a conical bottom located between two straight arms (32). A valve (9) is provided at the bottom of the weighing barrel (1). The movable pin (4) is arranged along the radial direction of the weighing barrel (1).

3. The weighing device according to claim 1, characterized in that: The sensor bracket (5) and the weighing beam bracket (6) are both vertically arranged columns. The sensor bracket (5) is located on the side of the weighing beam (3) away from the weighing barrel (1). The cantilever beam weighing sensor (2) is arranged along the direction of the center line of the V-shaped arm (31). The two weighing beam brackets (6) are symmetrically arranged about the center line of the V-shaped arm (31).

4. The weighing device according to claim 3, characterized in that: The sensor bracket (5) is a rectangular column with a hollow structure, and a notch (10) is provided on the top of the side facing the weighing bucket (1); the cantilever beam weighing sensor (2) is detachably fixed to the top of the sensor bracket (5) and passes through the notch (10), and the mounting foot (8) is located outside the sensor bracket (5).

5. The weighing device according to claim 1, characterized in that: The weighing beam cone foot (7) is a conical structure and is located at the lower side of one end of the V-shaped arm (31) away from the cantilever beam type weighing sensor (2).

6. The weighing device according to claim 1, characterized in that: Through holes cooperating with the movable pin (4) are provided on both sides of the weighing barrel (1); the movable pin (4) is a smooth round rod passing through the through hole, and its two ends are respectively fixed on two straight arms (32).

7. The weighing device according to claim 1, characterized in that: The model of the cantilever beam type weighing sensor (2) is Dayang DYX-301.

8. A modified plastic extrusion system, comprising a plurality of hoppers (14), a high-speed mixer (12) and an extruder (11), wherein the extruder (11) is located directly below the high-speed mixer (12) and its feed inlet is connected to the discharge outlet of the high-speed mixer (12); characterized in that: It also includes a weighing device (13) as described in any one of claims 1 to 7, wherein the weighing device (13) is located between the high-speed mixer (12) and the hopper (14), and the plurality of hoppers (14) are located directly above the weighing barrel (1), and the weighing barrel (1) is located directly above the feed port of the high-speed mixer (12).

9. The modified plastic extrusion system according to claim 8, characterized in that: The extrusion system is arranged in four layers, the extruder (11) is located on the first layer, the high-speed mixer (12) is located on the second layer, the weighing device (13) is located on the third layer, the hopper (14) is located on the fourth layer, the sensor bracket (5) and the weighing rod bracket (6) are both arranged on the third layer, and the weighing barrel (1) passes downward through the third layer.

10. The modified plastic extrusion system according to claim 8, characterized in that: The number of the hoppers (14) is three, and the three hoppers (14) are distributed in a triangle and around the axis of the weighing barrel (1).

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