Sand tank with sand adjusting rod capable of adjusting opening and controlling sand output

Abstract

The utility model relates to the technical field of dentistry, in particular to a sand tank with a sand adjusting rod capable of adjusting an opening to control sand output, which comprises a tank body, a cover, a base, a funnel, a sand guide pipe, a sand outlet pipe, a valve mounting piece, a duckbilled one-way valve, a knob cap, an adjusting nut and the sand adjusting rod. When the sand storage device works, sand powder flows to the bottom from the position between the side wall of the funnel and the sand guiding pipe, so that the sand powder is blown into the sand guiding pipe and then enters the top of the inner cavity, and the sand powder constantly enters air flow. No residual powder is left at the bottom. The sand powder is discharged from an air outlet pipe outlet in the top of the inner cavity. The sand adjusting rod is controlled to move up and down through rotation of the knob cap. When the knob cap is rotated, the sand adjusting rod moves downwards, and the gap is increased. Therefore, the flow channel space with the adjustable gap size can be obtained. The function of adjusting the sand production amount of a powder and gas mixture within a certain range is achieved, and therefore the problem that an existing sand tank is low in adjusting freedom degree is solved.

Description

Technical Field

[0001] This utility model relates to the field of dental technology, and in particular to a sand container with an adjustable opening that controls the amount of sand dispensed. Background Technology

[0002] Currently, the sand discharge rate of sand storage tanks generally relies on the indirect regulation method of pressure variation. Its working principle is to indirectly adjust the sand discharge rate by changing the pressure of the injected compressed gas.

[0003] However, this adjustment method has a significant drawback: it cannot precisely adjust the amount of sand output directly under constant pressure. This limitation results in insufficient freedom in adjusting the amount of sand output, making it difficult to meet the diverse needs of dental air polishing.

[0004] Especially when treating complex conditions, a constant sand output often fails to achieve the desired cleaning effect. Therefore, there is an urgent market need for a new type of sand storage device that can directly adjust the sand output under constant pressure and ensure uniform sand output to meet the practical needs of dental disease treatment and prevention. Utility Model Content

[0005] The purpose of this invention is to provide a sand jar with an adjustable opening that controls the amount of sand output, thereby solving the problem of low degree of freedom in the adjustment of existing sand jars.

[0006] To achieve the above objectives, this utility model provides a sand jar with an adjustable opening for controlling the sand output using a sand adjusting rod. The jar includes a body, a lid, a base, a funnel, a sand inlet pipe, a sand outlet pipe, a valve mounting component, a duckbill one-way valve, a knob cap, an adjusting nut, and a sand adjusting rod. The duckbill one-way valve has an air inlet. The lid is mounted on the body, the base is mounted on the side of the body away from the lid, the funnel is mounted inside the body, the sand inlet pipe is positioned at the top of the funnel, the sand outlet pipe is eccentrically mounted on the funnel, the valve mounting component is fixedly mounted on the base via the duckbill one-way valve, the knob cap is fixed to the lid by a shaft retainer, the adjusting nut is mounted on one side of the knob cap, and the sand adjusting rod is mounted on the adjusting nut.

[0007] The bottom sidewall of the funnel, the inner sidewall of the sand guide pipe, and the lower part of the sand adjusting rod constitute the mixing zone.

[0008] The knob cap has a double helical screw, which is connected to the adjusting nut.

[0009] The sand jar, in which the sand adjusting rod can adjust the opening to control the sand output, also includes a sealing element and a sealing ring. The sealing element is installed between the cover and the jar body, and the sealing ring is installed on the funnel and the sand outlet pipe.

[0010] The sealing element has a square groove and an inner groove lower wall, which are used for the movement of the adjusting nut.

[0011] The sand adjusting rod has a guide surface, and the included angle of the guide surface is no greater than 150°.

[0012] The lower part of the sand adjusting rod forms a sand discharge gap one with the inner wall of the sand guiding pipe, and the lower part of the sand guiding pipe has a circular V-shaped opening that forms a sand discharge gap two with the sloping wall of the funnel.

[0013] This utility model discloses a sand container with an adjustable opening for controlling the sand output using a sand adjusting rod. The container includes a container body, a lid, a base, a funnel, a sand inlet pipe, a sand outlet pipe, a valve mounting component, a duckbill one-way valve, a knob cap, an adjusting nut, and a sand adjusting rod. The lid is mounted on the container body, the base is mounted on the side of the container body away from the lid, the funnel is mounted inside the container body, the sand inlet pipe is located at the top of the funnel, the sand outlet pipe is eccentrically mounted on the funnel, the valve mounting component is fixedly mounted on the base via the duckbill one-way valve, the knob cap is fixed to the lid by a shaft retainer, the adjusting nut is mounted on one side of the knob cap, and the sand adjusting rod is mounted on the adjusting nut. When the sand container is working, sand flows from the side wall of the funnel and the sand inlet pipe to the bottom, thus blowing the sand into the sand inlet pipe and into the top of the inner cavity, achieving a constant sand inflow. No residual powder remains at the bottom. The sand is then discharged from the outlet pipe at the top of the inner cavity. The up-and-down movement of the sand adjusting rod is controlled by rotating the knob cap. When the knob cap is rotated, the sand adjusting rod moves downward, increasing the gap. This creates an adjustable flow channel space with a customizable gap, allowing for the adjustment of the sand output within a certain range for powder-air mixtures, thus solving the problem of limited flexibility in existing sand jar adjustments. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the structure of a sand jar with an adjustable opening that controls the amount of sand output according to the present invention.

[0016] Figure 2 This is a schematic diagram of a double-helix lead screw.

[0017] Figure 3This is a cross-sectional view of a sand jar with an adjustable opening that controls the amount of sand output according to the present invention.

[0018] Figure 4 This is a schematic diagram of the lower features and guide surfaces.

[0019] Figure 5 This is a schematic diagram of the seal.

[0020] In the diagram: 1-knob cap, 2-cover, 3-adjusting nut, 4-sand adjusting rod, 5-seal, 6-tank body, 7-sand inlet pipe, 8-funnel, 9-sand outlet pipe, 10-air inlet, 11-duckbill check valve, 12-sealing ring, 13-base, 14-valve mounting component, 101-double helical screw, 201-inner tank wall, 401-lower feature, 402-guide surface, 501-lower wall of inner tank, 502-square groove, 701-inner side wall, 702-circular figure-eight opening, 801-bottom side wall, A-mixing zone, a-sand outlet gap one, b-sand outlet gap two. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-5 This utility model provides a sand jar with an adjustable opening for controlling the sand output using a sand adjusting rod. It includes a jar body 6, a lid 2, a base 13, a funnel 8, a sand inlet pipe 7, a sand outlet pipe 9, a valve mounting component 14, a duckbill one-way valve 11, a knob cap 1, an adjusting nut 3, and a sand adjusting rod 4. The duckbill one-way valve 11 has an air inlet 10. The lid 2 is mounted on the jar body 6, the base 13 is mounted on the side of the jar body 6 away from the lid 2, the funnel 8 is installed inside the jar body 6, the sand inlet pipe 7 is located at the top of the funnel 8, the sand outlet pipe 9 is eccentrically mounted on the funnel 8, the valve mounting component 14 is fixedly mounted on the base 13 via the duckbill one-way valve 11, the knob cap 1 is fixed to the lid 2 via a shaft retainer, the adjusting nut 3 is mounted on one side of the knob cap 1, and the sand adjusting rod 4 is mounted on the adjusting nut 3.

[0023] The bottom sidewall 801 of the funnel 8, the inner sidewall 701 of the sand guide pipe 7, and the lower feature 401 of the sand adjusting rod 4 constitute the mixing zone A.

[0024] The knob cap 1 has a double helical screw 101, which is connected to the adjusting nut 3.

[0025] The sand jar with adjustable opening to control the amount of sand output also includes a sealing element 5 and a sealing ring 12. The sealing element 5 is installed between the cover 2 and the jar body 6, and the sealing ring 12 is installed on the funnel 8 and the sand outlet pipe 9.

[0026] The sealing element 5 has a square groove 502 and an inner groove lower wall 501, which are used for the movement of the adjusting nut 3.

[0027] The sand adjusting rod 4 has a guide surface 402, and the included angle of the guide surface 402 is not greater than 150°.

[0028] The lower feature 401 of the sand adjusting rod 4 forms a sand discharge gap a with the inner sidewall 701 of the sand guiding pipe 7, and the lower part of the sand guiding pipe 7 has a circular V-shaped opening 702 which forms a sand discharge gap b with the sloping wall of the funnel 8.

[0029] In this embodiment, the movable space of the adjusting nut 3 is restricted between the lower wall 501 of the inner groove of the sealing member 5 and the inner groove wall 201 of the cover 2. This space is also the distance that the sand adjusting rod 4 moves. When the sand reservoir is working, the sand powder flows from the sand storage gap formed between the side wall of the funnel 8 and the sand inlet pipe 7 to the air inlet 10 at the bottom, thereby blowing the sand powder into the sand inlet pipe 7 and then into the top of the inner cavity, realizing a constant airflow of sand powder. There is no residual powder at the bottom. Then the sand powder is discharged from the air outlet at the top of the inner cavity. A movable sand adjusting rod 4 is provided at the bottom of the sand inlet pipe 7. The sand adjusting rod 4 extends to the top of the cover 2 and is connected to the knob cap 1. The up and down movement is controlled by rotating the knob cap 1. The bottom feature of the sand adjusting rod 4 forms a tapered gap with the side wall of the circular figure-eight opening 702 at the bottom of the sand inlet pipe 7. When the sand adjusting rod 4 is in its initial position, the bottom feature of the sand adjusting rod 4 has a sand discharge gap a with the side wall of the circular V-shaped opening 702 at the bottom of the sand inlet pipe 7. When the knob cap 1 is rotated, the sand adjusting rod 4 moves downward, and the gap increases. This creates a flow channel space with an adjustable gap size, allowing for the adjustment of the sand discharge rate within a certain range for powder and gas mixtures.

[0030] When operators perform sandblasting for teeth cleaning, this sand storage tank can be used. Connect the tank to the instrument, and compressed gas enters the inner cavity of the tank, raising the sand powder. Because the circular V-shaped opening at the bottom of the sand inlet completely covers the air inlet, the speed at which the sand powder flows into the air inlet is not affected by the air pressure. The lower part of the sand inlet has a circular V-shaped opening, which amplifies the Venturi effect; and there is an outflow gap (b) between the circular V-shaped opening and the sloping wall of the circular funnel; gap (b) allows the sand powder to flow into the air inlet at a constant rate. After the circular V-shaped opening completely covers the airflow range of the air inlet, the sand powder flows down from gap (b) without being affected by the airflow of the air inlet, resulting in a uniform sand inlet. Therefore, a uniform sand output result can be obtained under constant or varying pressure. At the same time, rotating the knob cap will lower the sand adjustment rod, increasing the sand outlet gap (a) and resulting in a larger sand output. Conversely, by reversing the knob cap, the sand discharge gap (a) will become smaller, resulting in a smaller sand discharge volume.

[0031] Example 1

[0032] The sand inlet pipe is placed at the top of the funnel and extends from the middle to the bottom. The lower part of the sand inlet pipe has a circular V-shaped opening to amplify the Venturi effect. There is a gap (b) between the circular V-shaped opening and the sloping wall of the circular funnel. This gap (b) allows sand powder to flow into the air inlet at a constant rate. The lower dimension of the circular V-shaped opening is at least three times larger than the size of the air outlet. The edge feature completely covers the airflow area of ​​the air inlet; the sand powder flowing down from the gap (b) is not affected by the airflow at the air inlet, resulting in a uniform sand inlet. Therefore, a uniform sand output can be obtained. The gap (b) can be between 0.5 and 3.0 mm, with an optimal recommendation of 1.2 to 2.0 mm.

[0033] The mixing zone (A) is a turbulent airflow zone composed of three parts: the bottom sidewall of the funnel, the inner sidewall of the sand guide pipe, and the lower feature (401) of the sand adjusting rod. After the sand powder enters the mixing zone (A) through the gap (b), it is agitated and mixed by the compressed air in the air inlet. Then, it is guided by the guide surface at the lower part of the adjusting rod to flow from the sand outlet gap (a) into the sand guide pipe, and then flows out from the top of the sand guide pipe.

[0034] Example 2

[0035] The initial sand discharge gap (b) is a small gap, which will block some powder from passing through quickly, resulting in a small amount of sand discharge. When the rotary cap is rotated, the double-helix screw feature of the rotary cap will cause the sand adjusting nut to rotate. However, the square groove of the sealing element restricts the sand adjusting nut to move only along the square groove of the sealing element. This causes the sand adjusting rod to move downward. The double-helix feature of the rotary cap uses a large pitch P=4.0mm, which allows the sand adjusting rod to move 4.0mm with one rotation of the rotary cap. This results in a large range of adjustment for the sand discharge gap (a).

[0036] When the sand adjusting rod moves downward, the sand outlet gap will increase. The powder-air mixture in the mixing zone (A) can pass through quickly, resulting in a large sand output. Therefore, the movement of the sand adjusting nut within the lower wall of the seal groove and the inner wall of the cover groove corresponds to the range of sand output adjustment.

[0037] 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 tank with adjustable sand rod to control the sand output, characterized in that, it comprises a tank body, a cover, a base, a funnel, a sand guide pipe, a sand outlet pipe, a valve mounting, a duckbill check valve, a knob cap, an adjusting nut and an adjustable sand rod, the duckbill check valve has an air inlet; the cover is installed on the tank body, the base is installed on the side of the tank body away from the cover, the funnel is installed in the tank body, the sand guide pipe is arranged at the top of the funnel, the sand outlet pipe is eccentrically assembled on the funnel, the valve mounting is fixedly installed on the base through the duckbill check valve, the knob cap is fixed on the cover through a shaft with a ring, the adjusting nut is installed on one side of the knob cap, and the adjustable sand rod is installed on the adjusting nut.

2. The sand tank with adjustable sand rod to control the sand output according to claim 1, characterized in that, the funnel has a bottom sidewall, the sand guide pipe has an inner sidewall, and the adjustable sand rod has a lower feature, which form a mixing area.

3. The sand tank with adjustable sand rod to control the sand output according to claim 1, characterized in that, the knob cap has a double helix screw rod, and the double helix screw rod is connected with the adjusting nut.

4. The sand tank with adjustable sand rod to control the sand output according to claim 1, characterized in that, the sand tank with adjustable sand rod to control the sand output further comprises a sealing piece and a sealing ring, the sealing piece is installed between the cover and the tank body, and the sealing ring is installed on the funnel and the sand outlet pipe.

5. The sand tank with adjustable sand rod to control the sand output according to claim 4, characterized in that, the sealing piece has a square groove and an inner groove lower wall, and the square groove and the inner groove lower wall are used for the movement of the adjusting nut.

6. The sand tank with adjustable sand rod to control the sand output according to claim 1, characterized in that, the adjustable sand rod has a guide surface, and the included angle of the guide surface is not greater than 150°.

7. The sand tank with adjustable sand rod to control the sand output according to claim 1, characterized in that, a lower feature of the adjustable sand rod and an inner sidewall of the sand guide pipe form a sand outlet gap one, and a lower part of the sand guide pipe has a circular splay opening and a slope wall of the funnel forms a sand outlet gap two.

Images