CN112503390A

CN112503390A - Drainage device and dental workstation

Info

Publication number: CN112503390A
Application number: CN202011340356.1A
Authority: CN
Inventors: 阳方义
Original assignee: Rwd Life Science Co ltd
Current assignee: Rwd Life Science Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-03-16
Also published as: WO2022111011A1; CN115596645A

Abstract

An embodiment of the present invention provides a drainage apparatus, including: an air compressor; the air storage tank is connected with the air compressor; and a drain pipe connected with the gas storage tank; wherein, be provided with first hole in the drain pipe, the aperture in first hole is less than the pipe diameter of drain pipe, and the first hole presets the distance with the export interval of drain pipe, and during the drainage, the water in the gas holder flows through first hole and drain pipe. According to the embodiment of the invention, the first hole is arranged in the drain pipe connected with the air storage tank, the aperture of the first hole is smaller than the pipe diameter of the drain pipe, the first hole and the outlet of the drain pipe are separated by a certain distance, the first hole and the pipeline between the first hole and the outlet of the drain pipe play a role in buffering high-pressure water in the air storage tank, and the high-pressure water in the air storage tank is discharged after buffering and pressure reduction, so that the noise of the air storage tank during water discharge is reduced.

Description

Drainage device and dental workstation

Technical Field

The invention relates to the technical field of air compressors, in particular to a drainage device and a dental workstation.

Background

In industrial applications, an air compressor is a commonly used device for compressing air. An air storage tank is often provided at the rear end of the air compressor, and an electromagnetic valve and a drain pipe for draining water are provided at the bottom of the air storage tank. The water drainage is mainly used for draining water in the air storage tank, so that the air storage tank is kept relatively dry, and the air storage tank is prevented from rusting. The valve port of the electromagnetic valve is larger than or equal to the pipe diameter of the drain pipe, and only the drain pipe can be in an on-off state. When the electromagnetic valve is opened for drainage, high-pressure water in the air storage tank is communicated to the atmosphere through the drain pipe, great noise can be generated, and meanwhile, more gas can be discharged, so that the pressure in the air storage tank is suddenly reduced. If the air compressor is applied to a field sensitive to noise, such as a medical field, noise generated when the air storage tank discharges water may have adverse effects on the surrounding environment.

Disclosure of Invention

The embodiment of the invention provides a drainage device, and aims to solve the problem that in the prior art, a noise is large when a gas storage tank drains water.

In a first aspect, there is provided a drain comprising:

an air compressor (1);

the air storage tank (2) is connected with the air compressor (1); and

a drain pipe (3) connected with the air storage tank (2);

the water storage tank is characterized in that a first hole (31) is formed in the water drainage pipe (3), the aperture of the first hole (31) is smaller than the pipe diameter of the water drainage pipe (3), the first hole (31) and an outlet of the water drainage pipe (3) are separated by a preset distance, and during water drainage, water in the air storage tank (2) flows out through the first hole (31) and the water drainage pipe (3).

In a second aspect, a dental workstation is provided comprising a dental handpiece (7) and a drainage device as described above.

According to the embodiment of the invention, the first hole is arranged in the drain pipe connected with the air storage tank, the aperture of the first hole is smaller than the pipe diameter of the drain pipe, the first hole and the outlet of the drain pipe are separated by a certain distance, the first hole and the pipeline between the first hole and the outlet of the drain pipe play a role in buffering high-pressure water in the air storage tank, and the high-pressure water in the air storage tank is discharged after buffering and pressure reduction, so that the noise of the air storage tank during water discharge is reduced.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a first view of a drain provided in accordance with an embodiment of the present invention;

FIG. 2 is a second view of a drain provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of a drain pipe structure according to an embodiment of the present invention;

FIG. 4 is another schematic view of a drain pipe structure according to a second embodiment of the present invention

FIG. 5 is a partial logic diagram of a drainage device according to a second embodiment of the present invention;

fig. 6 is a schematic view of a dental workstation according to a third embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar modules or modules having the same or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the medical field, whether human or veterinary medicine, air compressors and air reservoirs are used to provide pneumatic power to some medical instruments, such as dental handpieces, to drive them to rotate at high speeds. Where silence is required in a medical environment, sudden sounds or sustained high decibels of noise can affect medical personnel and patients, especially when the patient is an animal, which can create an fear or agitation of the animal, making treatment impossible.

Example one

Fig. 1 is a first view of a drain device according to an embodiment of the present invention. Fig. 2 is a second view of a drain device according to an embodiment of the present invention. Fig. 3 is a schematic diagram of a drain pipe structure according to an embodiment of the invention. Referring to fig. 1 to 3, the drain device includes an air compressor 1, an air tank 2, and a drain pipe 3. Air compressor machine 1 is connected with gas holder 2, and gas holder 2 is connected with drain pipe 3. Be provided with first hole 31 in the drain pipe 3, the aperture of first hole 31 is less than the pipe diameter of drain pipe 3, and first hole 31 and the export interval of drain pipe 3 predetermine the distance. Preferably, the first hole 31 is provided proximate to the bottom of the air container 2. When discharging water, the high-pressure water in the gas tank 2 flows out through the first hole 31 and the water discharge pipe 3. The pipe between the first hole 31 and the outlet of the water discharge pipe 3 serves as a buffer for the high-pressure water, and the noise accompanying the outflow of the high-pressure water is reduced as compared with the case where the high-pressure water is directly led to the atmosphere. The smaller the diameter and the longer the length of the pipe between the first hole 31 and the outlet of the drain pipe 3, the more pronounced the damping effect and the more reduced the noise.

In the present embodiment, the first hole 31 is a thin-walled small hole, a short hole or an elongated hole having specific properties in terms of fluid transmission. When fluid passes through the small holes such as the thin-wall small hole, the short hole, the slender hole and the like, parameters such as flow, cross-sectional area, pressure difference and the like meet a specific formula. For example, a thin-walled aperture refers to an aperture having a ratio of the length to the diameter of the aperture of less than 0.5. The flow through the thin-walled orifice is proportional to the cross-sectional area of the thin-walled orifice and the square root of the pressure differential across it. The short hole is a hole with the ratio of the length to the diameter of the small hole being more than 0.5 and less than or equal to 4, and the flow formula is the same as that of the thin-wall small hole. The first hole 31 can be formed by a proportional valve, the opening degree of the first hole 31 can be effectively adjusted, and the structure is simple. Other valves may be used to form the first hole 31, and are not limited herein.

Example two

In the embodiment of the present invention, the basic structure of the drainage device is the same as that of the first embodiment, and the same reference numerals are used for the same components as those of the first embodiment, including all the features described in the first embodiment, and therefore, the description thereof is omitted.

Fig. 4 is another schematic view of a drain pipe structure according to a second embodiment of the present invention. Referring to fig. 1 to 4, the drainage device further includes a second hole 32 provided in the drainage pipe 3. The second hole 32 is located between the outlet of the drain pipe 3 and the first hole 31 or is provided at the outlet of the drain pipe 3. During drainage, the high-pressure water in the air tank 2 flows out through the first hole 31, the second hole 32 and the drain pipe 3.

Between the first hole 31 and the second hole 32 is a main buffer area, and the pipeline between the second hole 32 and the outlet of the drain pipe 3 can also play a role of buffer. The principle of buffering and decompressing high-pressure water is as follows: first, the aperture of the first hole 31 is adjusted to a predetermined opening degree, and the second hole 32 is closed. Then, the air compressor 1 and the air tank 2 are operated, the pressure P inside the air tank 2 is increased, and accumulated water is accumulated at the bottom of the air tank 2 and the portion of the drain pipe 3 between the first hole 31 and the second hole 32. At this time, the pressure of the part of the drain pipe 3 is the same as the pressure inside the gas tank 2, that is, the pressure difference between both ends of the first hole 31 is 0, the pressure outside the outlet of the drain pipe 3 is the atmospheric pressure P0, and the pressure difference between both ends of the second hole 32 is P-P0. When drainage is needed, the second hole 32 is opened, accumulated water flows out, the pressure of the part of the drainage pipe 3 between the first hole 31 and the second hole 32 is reduced, the pressure difference between two ends of the second hole 32 is reduced, and the pressure difference between two ends of the first hole 31 begins to be formed. On the other hand, since the first hole 31 has a small diameter and the volume of the air tank 2 is much larger than the volume of the drain pipe 3, the pressure inside the air tank 2 is considered to be constant. Subsequently, the accumulated water flowing through the first hole 31 and the second hole 32 forms a dynamic equilibrium, and the pressure P inside the air storage tank 2, the pressure P1 of the part of the drain pipe 3 between the first hole 31 and the second hole 32, and the pressure P0 outside the outlet of the drain pipe 3 are gradually decreased, i.e., P > P1> P0. Compared with the pressure difference which is continuously P-P0 and is suffered when the accumulated water flows out in the prior art, the pressure suffered when the accumulated water flows out in the embodiment of the invention is reduced in a step-wise way, and the accompanying noise is reduced. Preferably, the aperture of the first hole 31 is smaller than that of the second hole 32, so as to better realize the trend of decreasing the pressure step by step, and the aperture of the first hole 31 is smaller, so that the entrained gas is less while the water is drained, and the gas consumption of the gas storage tank 2 can be reduced, so as to avoid frequent starting of the air compressor 1.

In the present embodiment, the first orifice 31 is formed by an adjustable one-way throttle valve, and the second orifice 32 is formed by a solenoid valve. In practical application, the proportional valve is high in price, the adjustable one-way throttle valve and the electromagnetic valve are low in cost, and the combination of the two valves can form a main buffer area, so that the noise can be reduced better, and the overall cost is low. Other valves may be used to form the first and

second holes

31 and 32, and are not limited herein.

In the present embodiment, the first hole 31 is a thin-walled small hole, a short hole, or an elongated hole. The first orifice 31 is characterized in terms of fluid transmission in that the flow through the first orifice 31 is proportional to its cross-sectional area and to the pressure difference across it or to the square root of the pressure difference, preferably achieving a pressure step-wise decreasing trend.

Fig. 5 is a partial logic diagram of a drainage device according to a second embodiment of the present invention. As shown in fig. 5, the drainage apparatus further includes a first muffler 4 provided at an outlet of the drainage pipe 3. The first muffler 4 is provided at the outlet of the drain pipe 3, and the noise accompanying the drainage can be further reduced.

In the present embodiment, the drain device further includes a second muffler 5 and a timed drain 6. The second muffler 5 is connected to the intake end of the air compressor 1. The air is filtered, so that the damage of particles to the air compressor 1 is reduced, and the noise of the air inlet end of the air compressor 1 is effectively reduced. The timing drainage device 6 controls the opening and closing of the electromagnetic valve, and the electromagnetic valve is opened to automatically drain water according to a preset time interval or triggered by a preset event.

EXAMPLE III

In the embodiment of the present invention, the basic structure of the drainage device is the same as that of the first embodiment or the second embodiment, and the same reference numerals are used for the same components, including all the features described in the first embodiment and the second embodiment, which are not described herein again.

Fig. 6 is a schematic view of a dental workstation according to a third embodiment of the present invention. The dental workstation comprises a dental handpiece 7 and a drain. With reference to fig. 1 to 6, in an embodiment of the present invention, a dental workstation comprises: the device comprises a second silencer 5, an air inlet pipe 8, an air compressor 1, a pressure-resistant metal pipe 9, a normally open electromagnetic valve 10, an air storage tank 2, a pressure switch 11, a pressure regulating valve 12, an adjustable one-way throttle valve 13 (forming a first hole 31), a drain pipe 3, an electromagnetic valve 14 (forming a second hole 32), a timing drainage device 6, an air outlet pipe 15, a dental handpiece 7 and the like.

Air enters the air compressor 1 through the second silencer 5 and the air inlet pipe 8, after compression, high-pressure air is pressed into the air storage tank 2 through the pressure-resistant metal pipe 9, when the pressure inside the air storage tank 2 reaches a specific pressure, such as 0.8MPa, the pressure switch 11 cuts off the power supply, and the air compressor 1 stops working. Meanwhile, the normally open electromagnetic valve 10 connected with the pressure-resistant metal pipe 9 is also in a power-off state, and high-pressure air on one side of the pressure-resistant metal pipe 9 close to the air compressor 1 is discharged to the atmosphere, so that the air compressor 1 is prevented from stalling when being restarted. The high pressure air in the air storage tank 2 is adjusted to a suitable pressure, such as 0.5Mpa, through the pressure adjusting valve 12, and then is supplied to the dental handpiece 7 for working through the air outlet pipe 15.

When water needs to be drained, the opening degree of a valve port of the adjustable one-way throttle valve 13 at the bottom of the air storage tank 2 is adjusted to enable the water to reach proper water outlet pressure, and accumulated water in the air storage tank 2 reaches the electromagnetic valve 14 and the timing drainage device 6 through the drainage pipe 3 to be drained. The timing drain 6 can set a drain interval and a drain time period. Before water is drained, the opening degree of the valve port of the adjustable one-way throttle valve 13 is adjusted and can be fixed and unchanged in the later use process. When water needs to be drained, the electromagnetic valve 14 is opened, and high-pressure water in the air storage tank 2 is decompressed after passing through the first hole 31, the second hole 32 and the drain pipe 3, so that the effects of low noise and small-flow water drainage are achieved. And only a small amount of high-pressure air is discharged in the drainage process, so that the problem that the air compressor 1 needs to be frequently started because the pressure in the air storage tank 2 is reduced due to drainage is avoided.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A drain, comprising:

an air compressor (1);

the air storage tank (2) is connected with the air compressor (1); and

a drain pipe (3) connected with the air storage tank (2);

2. A drain device according to claim 1, further comprising a second hole (32) provided in the drain pipe (3);

the second hole (32) is located between the outlet of the drain pipe (3) and the first hole (31); or

Is arranged at the outlet of the water discharge pipe (3).

3. A drainage arrangement according to claim 2, wherein the first holes (31) have a smaller diameter than the second holes (32).

4. A drainage arrangement according to any of claims 1-3, characterized in that the first hole (31) is formed by a proportional valve.

5. A water discharge device according to claim 2 or 3, characterised in that the first aperture (31) is formed by an adjustable one-way throttle valve and the second aperture (32) is formed by a solenoid valve.

6. A drain device according to claim 1, characterized in that the first hole (31) is a thin-walled aperture, a short hole or an elongated hole.

7. A drainage arrangement according to claim 1, characterised by further comprising a first silencer (4) arranged at the outlet of the drain pipe (3).

8. The drain device according to claim 1, characterized by further comprising a second silencer (5) connected to the air intake end of the air compressor (1).

9. A drain device according to claim 5, characterized by further comprising a timed drain (6), said timed drain (6) opening said solenoid valve for draining according to preset time intervals.

10. Dental workstation, characterized in that it comprises a dental handpiece (7) and a drain according to any of claims 1-9.