A gas protection device for high-precision automatic weighing equipment

Abstract

The present invention provides a gas protection device for high-precision automatic weighing equipment; it includes an anti-escape component and a dust-proof component; the anti-escape component includes a gas barrier back-blowing coil, the gas barrier back-blowing coil is installed in a sealing cover, the gas barrier back-blowing coil is on the upper side of the weighing container of the weighing equipment, a plurality of jet holes are opened at the bottom of the gas barrier back-blowing coil, and the gas barrier back-blowing coil is connected to an external positive pressure gas source; the dust-proof component includes a back-blowing sleeve, the back-blowing sleeve is fixed outside the sealing cover, one end of the transmission shaft of the weighing equipment is connected to the weighing mechanism, the other end of the transmission shaft passes through the inner hole of the back-blowing sleeve and the axial hole of the sealing cover and is fixedly connected to the weighing container of the weighing equipment, a back-blowing hole is opened in the back-blowing sleeve, a port on one side of the back-blowing hole is connected to the inner hole of the back-blowing sleeve and the port is aligned with the transmission shaft of the weighing equipment, and a port on the other side of the back-blowing hole is connected to an external positive pressure gas source. The device has the advantages of protecting the weighing mechanism from dust pollution and reducing the loss of weighed materials.

Description

Technical Field

[0001] The invention relates to a gas protection device for high-precision automatic weighing equipment. Background Art

[0002] The raw material workshop needs high-precision automatic weighing equipment to weigh the incoming materials and then mix them. Usually, the high-precision automatic weighing equipment is set on the sealing cover of the mixing equipment. The high-precision automatic weighing equipment includes a transmission shaft, a weighing container and a weighing mechanism. The weighing mechanism and the weighing container are connected by a transmission shaft. The weighing container is in the sealing cover of the mixing equipment, and the weighing mechanism is fixed outside the sealing cover. The side wall of the sealing cover has an axial hole that matches the transmission shaft. Usually, a micro-conveyor device is used to accurately convey the material to the weighing container. After reaching the weighing value, the air-locking butterfly valve at the bottom of the sealing cover is opened, the weighing container is flipped 180 degrees, and the material is poured into the mixing equipment through the air-locking butterfly valve.

[0003] There are two places in this process where material dust is generated, which affects the weighing equipment and its weighing accuracy: 1) After the sealing cover air lock butterfly valve is opened, the material dust generated by the mixing equipment will flow into the sealing cover from the bottom along with the airflow, and the dust will diffuse into the weighing mechanism through the shaft hole, causing the mechanism parts to be contaminated and the weighing accuracy to be reduced. Long-term dust accumulation will cause wear of the transmission parts and reduce the service life of the equipment; 2) After the weighing container is turned over, the weighed material will also be lost in dust. The lost material cannot be measured and compensated, which reduces the batching accuracy. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a gas protection device for high-precision automatic weighing equipment, which can protect a weighing mechanism from dust pollution and reduce the loss of weighed materials.

[0005] In order to solve the above technical problems, the present invention provides a gas protection device for high-precision automatic weighing equipment;

[0006] Including anti-escape components and anti-dust components;

[0007] The anti-escape component includes an air barrier backflush coil, which is installed in a sealed cover, is located on the upper side of a weighing container of a weighing device, has a cavity in the air barrier backflush coil, has a plurality of air jet holes at the bottom of the air barrier backflush coil, and is connected to an external positive pressure air source;

[0008] The dustproof component includes a backblowing sleeve, which is fixed outside the sealing cover. One end of the transmission shaft of the weighing equipment is connected to the weighing mechanism, and the other end of the transmission shaft passes through the inner hole of the backblowing sleeve and the axial hole of the sealing cover and is fixedly connected to the weighing container of the weighing equipment. A backblowing hole is opened in the backblowing sleeve, and a port on one side of the backblowing hole is connected to the inner hole of the backblowing sleeve and this port is aligned with the transmission shaft of the weighing equipment, and a port on the other side of the backblowing hole is connected to an external positive pressure air source.

[0009] After adopting such a structure, the external positive pressure gas source outputs gas to the air barrier backflush coil and the backflush sleeve respectively, and controls the air barrier backflush coil and the backflush sleeve to spray out a circle of airflow together to form an air barrier. The air barrier generated by the air barrier backflush coil presses down to prevent the dust in the mixing equipment from entering the sealing cover. At the same time, the dust generated by the weighed material is also blown into the mixing equipment, reducing the weighing loss; the air barrier generated by the backflush sleeve prevents the dust from entering the weighing mechanism, avoiding the pollution of the internal parts of the weighing mechanism. The technical effect of protecting the weighing mechanism from dust pollution and reducing the loss of the weighed material is achieved.

[0010] In order to more clearly understand the technical content of the present invention, the gas protection device for high-precision automatic weighing equipment is referred to as the gas protection device below.

[0011] The gas protection device also includes a positive pressure component, which includes a shell and a micro-positive pressure gas nozzle. The weighing mechanism of the weighing device is installed in the shell. The transmission shaft of the weighing device passes through the shell, the inner hole of the backblowing sleeve and the axial hole of the sealing cover in sequence and is fixedly connected to the weighing container of the weighing device. The micro-positive pressure gas nozzle is also arranged in the shell. The micro-positive pressure gas nozzle is connected to an external positive pressure gas source, and the external positive pressure gas source continuously outputs gas medium to the micro-positive pressure gas nozzle.

[0012] With such a structure, the micro-positive pressure gas nozzle blows air continuously and uninterruptedly, and the air pressure can be adjusted, so that the weighing mechanism is always in a micro-positive pressure state, which prevents dust pollution generated during the weighing process and prevents dust in the air from drifting into the weighing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of an embodiment of the gas protection device.

[0014] Figure 2 yes Figure 1 Enlarged view of part A. DETAILED DESCRIPTION

[0015] like Figures 1 to 2 Shown

[0016] The gas protection device comprises an anti-escape component, a dust-proof component and a positive pressure component.

[0017] The anti-escape component includes an air barrier backflush coil 1, which is installed on the upper part of the sealing cover 4. The air barrier backflush coil 1 is on the upper side of the weighing container 62 of the weighing equipment. A cavity is provided inside the air barrier backflush coil 1. A plurality of jet holes (not shown in the figure) are opened at the bottom of the air barrier backflush coil 1. The jet holes are aligned with the air locking butterfly valve 41. The air barrier backflush coil 1 is connected to an external positive pressure air source.

[0018] The positive pressure component includes a shell 21 and a micro-positive pressure gas nozzle 22. The weighing mechanism 63 of the weighing equipment is installed in the shell 21 by bolts. The micro-positive pressure gas nozzle 22 is also arranged in the shell 21. The micro-positive pressure gas nozzle 22 is located on the side away from the sealing cover 4 relative to the weighing mechanism 63. The micro-positive pressure gas nozzle 22 is connected to an external positive pressure gas source, and the external positive pressure gas source continuously outputs gas medium to the micro-positive pressure gas nozzle 22.

[0019] The dustproof component includes a backblowing sleeve 3, which is welded to the inner wall of the shell 21 of the positive pressure component. The inner hole of the backblowing sleeve 3 is communicated with the axial hole 42 of the side wall of the sealing cover 4. One end of the transmission shaft 61 of the weighing device is connected to the weighing mechanism 63. The other end of the transmission shaft 61 passes through the shell 21, the inner hole of the backblowing sleeve 3 and the axial hole 42 of the sealing cover 4 in sequence and is welded and fixed to the weighing container 62 of the weighing device. A backblowing hole 31 is opened in the backblowing sleeve 3. A port on one side of the backblowing hole 31 is communicated with the inner hole of the backblowing sleeve 3 and this port is aligned with the transmission shaft 61 of the weighing device. The other side port of the backblowing hole 31 is connected to an external positive pressure air source.

[0020] When in use, the air-locking butterfly valve 41 of the sealing cover 4 is opened, the weighing container 62 is turned over, and the material falls naturally. At the same time, the external positive pressure gas source outputs gas to the air barrier backflush coil 1 and the backflush sleeve 3 respectively, and controls the air barrier backflush coil 1 and the backflush sleeve 3 to spray a circle of airflow together to form an air barrier. The size of the airflow can be adjusted by a one-way throttle valve. The air barrier generated by the air barrier backflush coil 1 presses down to prevent the dust in the mixing equipment from flowing into the sealing cover 4. At the same time, the dust generated by the weighed material is also blown into the mixing equipment 5 together, reducing the weighing loss.

[0021] The air barrier generated by the back-blowing sleeve 3 prevents dust from entering the weighing mechanism 63, thereby avoiding contamination of the internal parts of the weighing mechanism 63. A micro-positive pressure gas nozzle 22 is arranged at the rear end of the weighing mechanism 63. The micro-positive pressure gas nozzle 22 blows air continuously and the air pressure is adjustable, so that the weighing mechanism 63 is always in a micro-positive pressure state, which prevents dust pollution generated during the weighing process and prevents dust in the air from drifting into the weighing mechanism 63, so as to achieve the purpose of protecting the equipment and improving the batching accuracy.

[0022] The above is only one embodiment of the present invention. It should be pointed out that a person skilled in the art may make several modifications and improvements without departing from the principle of the present invention, and these should also be regarded as falling within the scope of protection of the present invention.

Claims

1. A gas protection device for high-precision automatic weighing equipment, characterized by: Including anti-escape components and anti-dust components; The anti-escape component includes an air barrier backflush coil, which is installed in a sealed cover, is located on the upper side of a weighing container of a weighing device, has a cavity in the air barrier backflush coil, has a plurality of air jet holes at the bottom of the air barrier backflush coil, and is connected to an external positive pressure air source; The dustproof component includes a back-blowing sleeve, which is fixed outside the sealing cover. One end of the transmission shaft of the weighing device is connected to the weighing mechanism, and the other end of the transmission shaft passes through the inner hole of the back-blowing sleeve and the axial hole of the sealing cover and is fixedly connected to the weighing container of the weighing device. A back-blowing hole is opened in the back-blowing sleeve, and a port on one side of the back-blowing hole is communicated with the inner hole of the back-blowing sleeve and the port is aligned with the transmission shaft of the weighing device, and a port on the other side of the back-blowing hole is connected to an external positive pressure air source; The jet hole is aligned with the air-locking butterfly valve and also includes a positive pressure component, which includes a shell and a micro-positive pressure gas nozzle. The weighing mechanism of the weighing equipment is installed in the shell, and the transmission shaft of the weighing equipment passes through the shell, the inner hole of the back-blowing sleeve and the axial hole of the sealing cover in sequence and is fixedly connected to the weighing container of the weighing equipment. The micro-positive pressure gas nozzle is also arranged in the shell, and the micro-positive pressure gas nozzle is located on the side away from the sealing cover relative to the weighing mechanism. The micro-positive pressure gas nozzle is connected to an external positive pressure gas source, and the external positive pressure gas source continuously outputs gas medium to the micro-positive pressure gas nozzle.

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