JPS63198799A - Vacuum pump device - Google Patents

Abstract

PURPOSE:To aim at miniaturization of the device in the caption by providing, in a vacant chamber portion, an exhaust port for exhausting steam mixture toward the inner circumferential surface portion in the substantially tangential direction, and disposing a suction portion between a liquid feeding pump and a suction press-feed pipe. CONSTITUTION:Water in a reservoir 3 is pressingly fed toward a suction portion 30 by means of a liquid feeding pump 5, and a suction pipe 35, which is connected to a tank 33 to become vacuous, is provided in connection thereto. A suction press-feed pipe 6, which serves as an exhaust port 9 in a steam separator 2, is disposed toward the inner circumferential surface portion in the substantially tangential direction. Steam mixture flows through the suction press-feed pipe 6 to be exhausted from the exhaust port 9 into a vacant chamber portion. Therefore, press-feed pressure generated by means of the liquid feeding pump becomes larger so as to easily obtain high vacuum.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention has a steam separator, a water storage tank, a liquid feed pump, and a suction pressure feed pipe. It can be easily obtained, operates quietly, has almost no risk of failure, can be expected to be smaller and cheaper, and has excellent economic efficiency, and can be used in a wide range of applications that require a vacuum state. The present invention relates to a vacuum pump device that can be used.

(Prior Art and Problems to be Solved by the Invention) Oil rotary pumps, which are widely used as vacuum pumps, have the advantage of being able to obtain a considerably high pumping speed even though they are small, and being more economical than other vacuum pumps. Its structural feature lies in the fact that it uses this oil to rotate the rotor within the cylinder chamber and maintain lubricity and airtightness in the cylinder chamber. Nia.

Now, if moisture flows into the cylinder chamber, the pump will seize and become inoperable, which will not only cause the vacuum pump to malfunction, but also cause serious problems such as defective products in the container that should be evacuated. It can also lead to situations like this. Therefore, in the past, it was necessary to pay close attention to operating conditions to prevent water containing water from flowing into the cylinder chamber.

Furthermore, since the oil rotary pump involves rotational movement of a rotor, it is inevitable that some pulsation will occur in the suction pressure.

The present invention eliminates the need to pay strict attention to operating conditions as in conventional oil rotary pumps, and can easily obtain a high vacuum under moderate operating conditions. In addition, it has the advantage of being able to reduce the size and cost of the equipment, and is also excellent in economic efficiency.For these reasons, it is recommended to replace the conventionally widely used oil rotary pump. The object of the present invention is to provide a vacuum pump device having a novel configuration that can be used in various applications.

(Means for solving all problems) A vacuum pump device 1 of the present invention has an inner peripheral surface portion 1 having a circular shape.
3 is provided with a tJF outlet 9 for discharging the air-water mixture toward the inner circumferential surface portion I3 in a substantially tangential direction thereof, and the air-water mixture discharged from the outlet 9 flows into the inner peripheral surface I3. The air-water mixture is attached to the peripheral surface 13 as if rotating, and is separated into gas and water by centrifugal action, and has an exhaust port 11 for discharging the separated gas. Drain port 1 for discharging the separated water
2 is provided in the empty chamber 7; a water tank 3 is buried in the drain port 12 and stores water; and a water tank 3 is connected to the water intake port 27 of the cough water tank 3 to store water. A liquid feeding pump 5 for pumping the water in the tank 3 has one end connected to the liquid feeding pump 5, the other end connected to the discharge port 9, and a constriction part 31 provided in the middle. The throttle part 31 is characterized in that it includes a suction pressure feeding pipe 6 provided with a suction port 32;

Note that "water" in the present invention is a concept that includes water mixed with an auxiliary agent such as an antifreeze solution for improving operating conditions as necessary.

(Example) Embodiments of the present invention will be described below based on the drawings.

The vacuum pump device 1 of the present invention shown in FIG.

Air moisture L! W2 has a discharge port 9, an attached water separation section 10, an exhaust port 11, and a drain port 12 provided in the vacant chamber 7 (see FIG. 2). To explain this specifically, the vacant chamber 7 is a disk-like shape with convex upper and lower surfaces, which is formed by connecting a -1-Ii protruding curved-F surface portion 15 and a downwardly protruding curved lower surface portion 16 below 1s of a circularly curved inner circumferential surface portion 13. 9, the empty chamber 7 is provided with a discharge port 9 for discharging the air-water mixture 17 in a substantially tangential direction toward the inner circumferential surface 13f, and the discharge port 9 is The air-water mixture 17 is applied to the inner peripheral surface portion 1.
It is made to look like it is rotating while attached to 3. Note that the air-water mixture is separated into water and gas by centrifugal action. Further, an exhaust port 11 is provided approximately at the center of the lower surface 15 of the empty chamber 7, and an OF water port 12 having a relatively large diameter is provided at the center of the lower surface 16 of the empty chamber 7. The water separating section 10, which is particularly provided in this embodiment, functions to separate water adhering to (sticking to) the inner circumferential surface section 13 from the inner circumferential surface section 13. The adhering water separation unit IO, for example, collides with the air-water mixture 17 rotating in a donut-shaped ring and obstructs its rotation, and the kinetic energy of the air-water mixture 17 is consumed by the rotation-obstructing action. It is configured to scrape off the swirling water from the inner circumferential surface portion 13. The attached water separating section 1o is, for example, an inner circumferential surface section 1
3 and the lower surface portion I6, the protrusion 19 provided downward or the peripheral edge portion 20 is provided in a horizontal state so that it contacts the slightly lower side of the circumferential center portion of the inner peripheral surface portion 13. 21 and ζ is formed. In addition, the protrusion] 9 extends from the upper end 22 to the lower end 23 (I
It is preferable that the P water outlet 12 be curved gently toward the darkness (see Figures 3 and 4).

In this embodiment, the water storage tank 3 has a relatively tall cylindrical shape with a bottom, as shown in FIGS. is communicated with.

The liquid feed pump 5 pumps water under high pressure, and its pump suction port 26 is connected to a water intake port 27 provided at the lower end of the water tank 3 (see FIG. 1).

As shown in FIG. A suction section 30 is provided in the middle of the suction section 30.The suction section 30 is connected to a suction pressure feeding pipe 6 as shown in FIG.
(In this embodiment, two nozzles 33 provided at a small interval)
, 33) is provided with a suction port 3.2, and a suction pipe 35 connected to a tank 33 (see FIG. 1) to be evacuated is connected to the suction port 32.

In this embodiment, in order to automatically prevent the water level in the water tank 3 from exceeding the set water level due to excessive water supply into the water tank 3, the upper part of the water tank 3 is required. A surplus water discharge port 36 is provided at the portion (see FIGS. 1 and 2), and the exhaust port 11 and the surplus water discharge port 36 are connected to one discharge pipe 37. In FIG. 1, reference numeral 39 is a water supply and drainage pipe provided in the water tank 3, and reference numeral 4 is a pipe for water supply and drainage provided in the water tank 3.
0 is a water level display tube, and 4I is a replenishment part in which a replenishment port through which water can be replenished is formed by opening the lid.

(Function) However, when the liquid feed pump 5 is operated with the required amount of water stored in the water storage tank 3, the water in the water storage tank 3 flows toward the constriction part 31 as shown in FIG. It is supplied at high pressure and flows through the constriction section 31 at high speed.

Then, due to the suction force of the high-speed water flowing through the constriction section 31,
A vacuum chamber 41 is formed between the nozzles 33 and 33 in the constriction portion 31, so that the gas in the tank 34 connected to the suction port 32 is sequentially sucked. The water that has passed through the throttle part 31 is mixed with the gas sucked in at the suction port 32, and the air/water mixture, which is a mixture of water and gas, flows through the suction pressure feed pipe 6 and becomes the air/moisture #H2. The discharge port 9 is discharged into the empty chamber 7 at high speed.

The air/water mixture 17 sequentially discharged into the cavity 7 is subjected to centrifugal force, as shown by the dashed line in FIG. Turn while attached. At that time, the gas is forced out by centrifugal action, and the air-water mixture 17 is quickly separated into gas and water. The separated gas gathers in the center of the empty chamber 7 and is smoothly discharged from the exhaust port 11, and the separated water is gradually and gently discharged from the drain port 12 into the water tank 3. It is stored in the water storage tank 3 and is again pumped by the liquid feed pump 5.

As the separated water rotates around the inner peripheral surface 13 of the cavity 7, its kinetic energy is gradually consumed, and the water leaves the inner peripheral surface 13 and is discharged into the water storage PJ3. In this embodiment, since the adhering water separating section 10 is provided in the empty chamber 7, the movement of the swirling water can be obstructed by the adhering water separating section IO, thus reducing the consumption of kinetic energy for storing the swirling water. Promote scales. As a result, the swirling water is actively scraped off from the inner circumferential surface 13, and the water discharged into the steam-water separator 2 is quickly collected into the water storage tank 3 and used for the next Wi ring. It will be used efficiently and effectively.

By repeating the above cycle, the degree of vacuum in the tank connected to the suction port 32 can be gradually increased, and a desired vacuum state can be obtained.

(Others) ■ The rotor blades are rotated using the kinetic energy of the air-water mixture, and the resulting power is used to rotate the fan, and the FI accompanying the rotation of the air-water mixture is
Water whose temperature has increased due to Xm heat, steam separator 2, etc.
It is also possible to configure cooling by rotation of the fan. In this case, it is preferable to house the rotor blade in the steam/water separator, and in this case, the rotor blade also functions as the above-mentioned adhered water separation section.

■ In the case where the adhering water separating section is provided in the empty chamber 7, the nuclear adhering water separating section 10 is separated from the inner circumferential surface section 13 as shown in FIG.
In this case, the circumferential surface portion 43 of the cavity 7 surrounds the outside of the inner circumferential surface portion 13. However, it adhered to the inner circumferential surface portion 13 (
The swirling water that swirls in a state of clinging (see arrows in FIG. 6) sequentially seeps out from the pores 42 due to centrifugal action, and the water that seeps out flows down along the peripheral surface 43 and is stored from the drain port 12 (see the arrow shown in FIG. 6). It will be quickly collected into the tank 3.

(Effects of the Invention) ■ The vacuum pump device of the present invention jets out pressurized water supplied by a liquid pump at high speed at a constriction part, and generates gas (gas containing moisture, dust, etc.) by its wake. Since it is a device that suctions a high vacuum (the highest degree of vacuum is 650 to 760 mailg) by increasing the pressure of the liquid pump,
) can be obtained. Further, since the gas is sucked by wake flow, the gas suction is performed continuously, and therefore, there is no pulsation in the suction pressure, and quiet operation is possible.

■ In the vacuum pump device of the present invention, the mixture of gas and water sucked in the suction part can be easily and reliably separated in the air-water separator, and if necessary, a filter etc. can be installed in the water storage tank. Since it is also possible to provide
Even if moisture, dust, acidic gas, etc. are sucked into the suction section, there is no problem because they can be removed very easily. Therefore, the vacuum pump device of the present invention
It can be operated under much more relaxed conditions than conventional oil rotary pumps and can be used in a wide range of applications requiring vacuum.

■ Even when the vacuum pump device of the present invention consumes a large amount of water as a working medium (for example, 4 to 12 tons per hour), the vacuum pump device performs steam and water separation using a steam-water separator, and the separated water is Because it is configured to be used repeatedly as a working medium, it can be operated continuously even with a limited amount of working water (for example, about 404 liters), and when the viscosity of the working medium water increases and water needs to be replaced. However, since the amount of water required is small, the replacement work can be done efficiently. For these reasons, the vacuum pump device of the present invention is extremely economical.

■ In the vacuum pump device of the present invention, swirling motion is applied to the steam-water mixture in the steam-water separator, the steam-water mixture is easily separated into gas and water by centrifugal action, and the separated water is sequentially stored in water. Since the vacuum pump is configured to be discharged into the tank, the steam separator and the water storage tank can be made small, and the entire vacuum pump apparatus can therefore be made small. By the way, if the air-water mixture were to be discharged directly into the water storage tank, intense foaming would occur in the water storage tank.Therefore, in order to prevent foam from entering the liquid pump, it is necessary to adjust the capacity of the water storage tank. needs to be very large.

In particular, as described in the above embodiment, when the adhering water separation section is provided in the empty chamber, the consumption of the kinetic energy of the swirling water can be accelerated. Even if the water is wet, the water discharged into the steam-water separator can be quickly recovered into the water storage tank, and water circulation can be made more efficient. Therefore, the required amount of water as the working medium is reduced, and therefore the water storage tank can be made more compact.

(2) The vacuum pump device of the present invention has a simple structure and has almost no failure parts, so it has excellent durability and can be provided at low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a sectional view thereof, Figs. FIG. 6 is a cross-sectional view showing another example of the attached water separation section. 1... Vacuum pump device, 2... Steam water separator, 3...
・Water tank, 5...liquid feed pump, 6...suction pressure feed pipe,
7... Vacancy part, 9... Discharge port, IO... Adhered water separation part, 11... Exhaust port, 12... Drain port, 13...
・Inner peripheral surface part, 27... Water intake part, 31... Throttle part, 3
2...Suction port.

Claims (1)

[Claims] A discharge port 9 for discharging the air-water mixture toward the inner circumferential surface portion 13 in a substantially tangential direction thereof is provided in the empty chamber 7 having a circular inner circumferential surface portion 13. The air/water mixture adheres to the inner circumferential surface part 13 and swirls, and the air/water mixture is separated into gas and water by centrifugal action, and an exhaust system is provided to discharge the separated gas. A steam-water separator 2 in which a port 11 and a drain port 12 for discharging the separated water are provided in the empty chamber 7; a water storage tank 3 connected to the drain port 12 and storing water;
a liquid feed pump 5 which is connected to the water intake port 27 of the water storage tank 3 and pumps water in the water storage tank 3; one end is connected to the liquid feed pump 5 and the other end is connected to the discharge port 9; and a constricted part 31 is provided in the middle, and the constricted part 31
A vacuum pump device comprising: a suction pressure feed pipe 6 having a suction port 32;