Sand storage tank with separation chamber capable of fully mixing powder

Abstract

The utility model relates to the technical field of dentistry, in particular to a sand storage tank with a separation chamber capable of fully mixing powder, which comprises a sand storage tank body, a mixing chamber, a sand outlet pipe, a pressure balance hole and a storage chamber, the mixing chamber is provided with an air inlet channel, and the storage chamber is provided with a bottom hole; the mixing chamber is installed in the sand storage tank body, the sand storage tank body is connected with an instrument, and when compressed gas enters an air inlet channel below the sand storage tank body, high-speed airflow takes away sand powder in the channel; and the bottom hole of the storage chamber is located in a negative pressure area, and high-speed airflow can suck out sand powder in the negative pressure area. When the air inlet pressure is increased, the negative pressure value of the bottom hole of the storage chamber is increased, and the amount of sucked powder is increased. According to the utility model, the phenomena of excessive residue in the tank and non-uniform sand production can be prevented. And the sand blasting efficiency is effectively ensured, so that the problem that the powder and gas mixing efficiency of an existing sand storage tank is relatively low is solved.

Description

Technical Field

[0001] This utility model relates to the field of dental technology, and in particular to a sand storage tank with a separate chamber that can fully mix powder. Background Technology

[0002] Dental air polishing equipment uses compressed gas (usually air) to lift sand powder from a storage tank. The sand powder is then transported to the air polishing handle through an air outlet. The high-speed airflow impacts the tooth surface, thereby removing plaque, soft deposits, early tartar, tobacco stains, tea stains, and other substances from the supragingival and subgingival tooth surfaces.

[0003] Currently available sand storage tanks all have only one chamber, with the storage chamber and mixing chamber located in the same interconnected space. This results in low mixing efficiency of the powder and gas, leading to uneven sand output and making it unsuitable for treating complex conditions during sandblasting. Utility Model Content

[0004] The purpose of this invention is to provide a sand storage tank with a separation chamber that can fully mix powder, aiming to solve the problem of low mixing efficiency of powder and gas in existing sand storage tanks.

[0005] To achieve the above objectives, this utility model provides a sand storage tank with a separation chamber that can fully mix powders, including a sand storage tank body, a mixing chamber, a sand outlet pipe, a pressure balance hole, and a storage chamber. The mixing chamber has an air inlet channel, and the storage chamber has a bottom hole.

[0006] The mixing chamber is installed inside the sand storage tank body, the storage chamber is installed inside the sand storage tank body, the pressure balance hole is located between the mixing chamber and the storage chamber, the sand outlet pipe is connected to the mixing chamber, the air inlet channel is located at the bottom of the mixing chamber, and the bottom hole is located at the bottom of the storage chamber.

[0007] The sand storage tank body includes a lid and a tank body, the tank body is installed on the outside of the mixing chamber, and the lid is installed on the tank body.

[0008] The cover has threads located on the inner sidewall of the cover.

[0009] Wherein, the axial angle between the bottom hole and the air intake channel is not less than 90 degrees.

[0010] The size of the pressure balancing hole is 0.2mm-0.5mm.

[0011] This utility model discloses a sand storage tank with a separation chamber capable of fully mixing powders. It includes a sand storage tank body, a mixing chamber, a sand outlet pipe, a pressure balance hole, and a storage chamber. The mixing chamber has an air inlet channel, and the storage chamber has a bottom hole. The mixing chamber and the storage chamber are installed within the sand storage tank body. The pressure balance hole is located between the mixing chamber and the storage chamber. The sand outlet pipe communicates with the mixing chamber. The air inlet channel is located at the bottom of the mixing chamber, and the bottom hole is located at the bottom of the storage chamber. When the sand storage tank body is connected to an instrument, compressed gas enters the air inlet channel below the sand storage tank body. The high-speed airflow carries away the sand powder within the channel. Furthermore, the bottom hole of the storage chamber is in a negative pressure zone, and the high-speed airflow draws out the sand powder from this negative pressure zone. When the inlet pressure is increased, the negative pressure value at the bottom hole of the storage chamber increases, resulting in a larger amount of powder being drawn out. Conversely, it decreases, preventing excessive residue in the tank and uneven sand discharge. This effectively ensures the efficiency of sandblasting, thus solving the problem of low mixing efficiency of powder and gas in existing sand storage tanks. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the structure of a sand storage tank with a separation chamber that can fully mix powder according to the present invention.

[0014] Figure 2 This is a cross-sectional view of a sand storage tank with a separation chamber that can fully mix powder according to this utility model.

[0015] Figure 3 This is a cross-sectional view from another direction of a sand storage tank with a separation chamber that can fully mix powder according to this utility model.

[0016] In the diagram: 1-lid, 2-tank body, 3-mixing chamber, 4-sand outlet pipe, 5-pressure balance hole, 6-storage chamber, 7-air inlet channel, 601-bottom hole. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0018] Please see Figures 1-3This utility model provides a sand storage tank with a separation chamber that can fully mix powder, including a sand storage tank body, a mixing chamber 3, a sand outlet pipe 4, a pressure balance hole 5, and a storage chamber 6. The mixing chamber 3 has an air inlet channel 7, and the storage chamber 6 has a bottom hole 601. The mixing chamber 3 is installed in the sand storage tank body, and the storage chamber 6 is installed in the sand storage tank body. The pressure balance hole 5 is located between the mixing chamber 3 and the storage chamber 6. The sand outlet pipe 4 is connected to the mixing chamber 3. The air inlet channel 7 is located at the bottom of the mixing chamber 3, and the bottom hole 601 is located at the bottom of the storage chamber 6.

[0019] The sand storage tank body includes a cover 1 and a tank body 2. The tank body 2 is installed on the outside of the mixing chamber 3, and the cover 1 is installed on the tank body 2.

[0020] The cover 1 has threads located on the inner sidewall of the cover 1.

[0021] When the axial angle between the bottom hole 601 and the air intake channel 7 is not less than 90 degrees.

[0022] The pressure balancing hole 5 has a size of 0.2mm-0.5mm.

[0023] In this embodiment, the storage chamber 6 is funnel-shaped, with the bottom hole 601 offset or centered. A mixing chamber 3 is placed on its other side. The lower half of the mixing chamber 3 is circular. The end of the air inlet channel 7 is located at the bottom of the mixing chamber 3, and its extension line is offset from the center of the mixing chamber 3. Additionally, a sand outlet pipe 4 is placed on the other side of the mixing chamber 3, with its outlet positioned in the upper part of the mixing chamber 3 and extending to the outside of the mixing chamber 3 to discharge sand powder. At least one pressure balance hole 5, not less than 0.3 mm, is provided at the top of the mixing chamber 3, communicating with the storage chamber 6. The axial angle (a°) between the bottom hole 601 of the storage chamber 6 and the axial angle of the air inlet channel 7 is not less than 90 degrees, and the hole diameter ratio is not greater than 1:1.

[0024] When the tank 2 is connected to the instrument, compressed gas enters the air inlet channel 7 below the tank 2. The high-speed airflow carries away the sand powder in the channel. Furthermore, the bottom hole 601 of the storage chamber 6 is in a negative pressure zone, and the high-speed airflow draws out the sand powder from this negative pressure zone. When the inlet pressure is increased, the negative pressure value of the bottom hole 601 of the storage chamber 6 increases, resulting in a larger amount of powder being drawn out. Conversely, it decreases, thus solving the problem of excessive residue in the tank and uneven sand output. This effectively ensures the efficiency of sandblasting.

[0025] Example 1

[0026] The lower half of the storage chamber is funnel-shaped with an opening at the bottom. This opening can be set between 1.5 and 3.5 mm, with an optimal size of 2.0 mm. This ensures that different powders flow out of the storage chamber by their own weight. Furthermore, when the axial angle (a°) is not less than 90 degrees, a recommended angle of 95°-100° ensures that the high-speed airflow from the inlet channel is directly ejected without diversion to the storage chamber. At this point, the high-speed airflow from the inlet channel carries away the sand powder within the channel, creating a negative pressure zone at the bottom of the storage chamber relative to the high-pressure zone at the channel. Therefore, the sand powder in the negative pressure zone is drawn out. When the inlet pressure is increased, the negative pressure value at the bottom of the storage chamber increases, resulting in a larger amount of powder being drawn out. Conversely, decreasing the pressure breaks down the adhesion between fine powder particles, ensuring smooth flow of sand powder.

[0027] After the sand powder is carried into the mixing chamber by the high-speed airflow through the channel, the axial extension of the channel does not coincide with the center of the mixing chamber, allowing the powder-air mixture to spiral upwards along the arc side of the mixing chamber. This ensures a more thorough mixing of the powder and compressed air. Finally, it is discharged from the sand outlet pipe.

[0028] Example 2

[0029] A pressure balancing orifice is positioned between the mixing chamber and the storage chamber, connecting the two. After the powder and air are mixed, most of it will be discharged from the sand outlet pipe, while a small portion of high-pressure air will flow into the storage chamber through the pressure balancing orifice. To ensure that no powder or only a small amount of powder enters the storage chamber, this orifice should be made as small as possible, approximately 0.2-0.5 mm in size.

[0030] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A sand storage tank capable of mixing powder sufficiently in a separate chamber, characterized in that, it comprises a sand storage tank body, a mixing chamber, a sand outlet pipe, a pressure balance hole, and a storage chamber, the mixing chamber has an air inlet passage, and the storage chamber has a bottom hole; the mixing chamber is installed in the sand storage tank body, the storage chamber is installed in the sand storage tank body, the pressure balance hole is located between the mixing chamber and the storage chamber, the sand outlet pipe communicates with the mixing chamber, the air inlet passage is located at the bottom of the mixing chamber, and the bottom hole is located at the bottom of the storage chamber.

2. The sand storage tank capable of mixing powder sufficiently in a separate chamber according to claim 1, characterized in that, the sand storage tank body comprises a lid and a tank body, the tank body is installed outside the mixing chamber, and the lid is installed on the tank body.

3. The sand storage tank capable of mixing powder sufficiently in a separate chamber according to claim 2, characterized in that, the lid has a thread, and the thread is located on the inner side wall of the lid.

4. The sand storage tank capable of mixing powder sufficiently in a separate chamber according to claim 1, characterized in that, the angle between the bottom hole and the axis of the air inlet passage is not less than 90 degrees.

5. The sand storage tank capable of mixing powder sufficiently in a separate chamber according to claim 1, characterized in that, the size of the pressure balance hole is 0.2-0.5 mm.

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