JPH0522023U - Oil rotary vacuum pump oil smoke adsorption device - Google Patents

Abstract

(57) [Summary] (Modified) [Configuration] The oil adsorber connected to the exhaust port of the oil rotary vacuum pump is a transparent hollow cylinder 11, and an oil adsorbent 18 is loosely filled therein. [Effect] Exhaust gas does not pass through the oil absorber,
The oil adsorbed state of the oil adsorbent is known, and the filling state when the new oil adsorbent is filled in the transparent hollow cylinder 11 is also known.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for treating oil smoke of an oil rotary vacuum pump.

[0002]

[Prior Art]

 The function of the oil rotary vacuum pump is to reduce the pressure by compressing the intake gas above atmospheric pressure and opening the exhaust valve, but as the pressure decreases, the exhaust valve cannot be opened with only the gas. Therefore, use the oil to open the exhaust valve while the pressure is reduced. However, if the pressure rises in the state of using oil, the exhaust gas will not contain oil and will be discharged from the exhaust port as oil smoke. For this reason, the exhaust gas from the oil rotary vacuum pump cannot be released into the atmosphere as it is, and the conventional oil smoke separator is used.

[0003]

[Problems to be solved by the device]

 It is not desirable to provide exhaust resistance on the exhaust side of the oil-sealed rotary vacuum pump because it will reduce pump performance. Therefore, the oil-smoke separator creates a passage with a large cross-sectional area in the oil adsorbent that connects the inlet and outlet, and the oil smoke flowing loosely through this passage is arranged in a tubular shape around the passage to remove oil smoke from the oil smoke that touches the oil adsorbent. Trying to absorb oil. However, in such an oil-smoke separator, the exhaust resistance is small, but the disadvantage is that the proportion of the exhaust gas that passes through the oil-smoke separator is relatively large. On the other hand, the oil adsorber, which is filled with an oil adsorbent in a closed container and pumps oil smoke from the container inlet with exhaust pressure and discharges the air from which oil has been removed from the outlet, has a large exhaust resistance and therefore rotates the oil. It cannot be used for vacuum pumps. In addition, even if the conventional oil-smoke separator adsorbs oil until the oil adsorbent loses its oil-adsorbing capacity, the state is unknown, so the oil in the oil-smoke is released into the atmosphere with little removal. It may be touched and pollute the discharged area with oil.

In view of the above points, an object of the present invention is to provide an oil smoke adsorbing device for an oil rotary vacuum pump that can reliably adsorb oil and know the oil adsorbed state.

[0005]

[Means for Solving the Problems]

 A first aspect of the present invention is an oil smoke adsorbing device equipped with an oil adsorber containing an adsorbent in a container in which one opening is connected to an oil rotary vacuum pump discharge port and the other opening is connected to the atmosphere, The container is a transparent hollow cylinder sandwiched between an inlet flange and an outlet flange each having an opening serving as an inlet and an outlet, and the inside of the container is loosely filled with an oil adsorbent. It is an adsorption device.

According to a second aspect of the present invention, there is provided a blower chamber accommodating a blower for energizing oil smoke according to the flow, outside the inlet flange whose inlet opening communicates with the exhaust port of the oil rotary pump. Is an oil smoke adsorbing device for an oil rotary vacuum pump according to the first invention, wherein the exhaust port of the oil rotary pump is connected.

A third aspect of the present invention is to install a blower chamber accommodating a blower for energizing the oil smoke according to the flow on the outside of the outlet flange whose outlet opening is open to the atmosphere. It is an oil-smoke adsorbing device for an oil rotary vacuum pump according to the first invention, which is provided with an outlet opening communicating with the atmosphere.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of an embodiment in which the features of the present invention are best shown. The oil rotary vacuum pump 1 and an oil adsorber 2 generally designated by reference numeral 2 are connected to each other by an exhaust duct 3. One of the exhaust ducts 3 is connected to the exhaust port 4 of the oil rotary vacuum pump 1, and the other is connected to the inlet 5 of the oil adsorber 2.

The oil adsorber 2 is a container filled with an oil adsorbent, and the container has one end faces of circular flanges 6 and 7 of an inlet and an outlet each having an opening of an inlet 5 and an opening of an outlet 13. A sealing ring such as an O-ring 9 is fitted into the annular groove 8 provided in each of the two, and further, both ends of a transparent cylinder made of polyester resin, for example, a hollow cylinder 11 are fitted into the annular groove 8, respectively, and between the inlet and outlet flanges 6 and 7. Are pulled and fixed by bolts and nuts 12. The inlet flange 6 is provided with the oil smoke inlet 5 described above, and the opening of the outlet flange 7 serves as an outlet 13 for oil-free air. Since the dispersion space 14 and the gathering space 15 are provided in the transparent hollow cylinder 11 in contact with both flanges 6 and 7, the dispersing plate 16 with legs made of a perforated plate and the gathering plate 17 are fitted into the transparent hollow cylinder 11. There is. An oil adsorbent 18 is loosely filled between the dispersion plate 16 and the collecting plate 17.

The oil adsorbent 18 is made of polypropylene fiber (for example, Orthove (registered trademark)) and has a ribbon shape or a chip shape. When filling the transparent hollow cylinder 11, the inlet flange 6 The transparent hollow cylinder 11 is fitted into the annular groove 8 of the transparent hollow cylinder 11 through the O-ring 9, and the legs of the dispersion plate 16 are fitted into the transparent hollow cylinder 11 so that the flange 6 is in contact with the transparent hollow cylinder 11. Loosely insert into 11. That is, it is placed in a non-oriented manner without compaction. In the case of the chip-shaped oil adsorbent 18, the gravity is used for filling. The filling is performed up to near the upper edge of the transparent hollow cylinder 11. By such filling, the volume of the oil adsorbent 18 occupying in the transparent hollow cylinder 11 becomes relatively small as compared with the internal volume of the transparent hollow cylinder 11. The reason why the oil adsorbent 18 is loosely filled in this way is that the exhaust resistance received by the oil smoke from the inlet 5 to the outlet 13 is made as small as possible, and the oil smoke strays in the gap formed between the oil adsorbents 18 This is to increase the area that acts on. Thus, it is not easy to fill the oil adsorbent 18 into the container loosely. When the conventional oil adsorbent is filled into the container, the oil adsorbent is compacted, and the pressure applied at that time can control the degree of compression of the filled oil adsorbent. However, in the present invention, it is not possible to consolidate the oil adsorbent 18 with an apparently large pressure. By doing so, the exhaust resistance increases and the performance of the oil rotary vacuum pump 1 is affected. Therefore, in the present invention, the hollow cylinder 11 is made transparent so that the internal state can be observed, and it is possible to uniformly fill the oil adsorbent 18 including the case where the pressure is not applied at all and the compaction is performed with the maximum light force. It was done. After the filling, the collecting plate 17 is fitted in the transparent hollow cylinder 11, the outlet flange 7 in which the O-ring 9 is fitted in the bottom of the annular groove 8 is fitted in the transparent hollow cylinder 11, and the bolt nut 12 is provided between the flanges 6 and 7. To assemble.

Next, the operation of the above-described configuration will be described. When the oil rotary vacuum pump 1 is operated, air is exhausted from the exhaust port 4. This exhaust gas turns into oil smoke depending on the state of the oil rotary vacuum pump 1, enters the dispersion space 14 from the inlet 5 of the oil adsorber 2 through the exhaust duct 3, passes through the dispersion liquid 16, and passes through the oil adsorbent 18. Pass through the void. The void has a labyrinth-like shape, and the oil smoke advances by adsorbing oil by adhering to the oil adsorbent 18 around the void and passing through the collecting plate 17 to the collecting space 15. The exhaust gas in the gathering space 15 is air that has been cleaned by extracting oil, and is discharged to the atmosphere through the outlet 13. Since the oil adsorbent 18 is loosely filled in the container, the exhaust resistance is small and the pressure reducing performance of the oil rotary vacuum pump is not impaired.

Thus, the oil adsorbent 18 gradually reduces the amount of adsorbed oil from the inlet 5 side toward the outlet 13 side, but as time elapses, the outlet 13 side also sufficiently adsorbs oil and the oil adsorbing ability decreases. .. Therefore, the oil adsorbent 18 changes its color due to oil adsorption, so that the color change area can be known through the transparent hollow cylinder 11, and the oil adsorbent 18 is replaced here.

Next, another embodiment will be described. FIG. 2 is a vertical sectional view of a second embodiment of the present invention. In the figure, parts having the same functions as those in the previous embodiment are designated by the same reference numerals, and their explanations are omitted. This embodiment is different from the previous embodiment in that a blower for urging exhaust gas in the exhaust direction is provided on the inlet side of the oil adsorber. In the figure, the exhaust duct 3 is connected to the blower chamber inlet 22 of the blower chamber inlet flange 21, and the blower chamber inlet flange 21 is superposed on the inlet flange 6 with a hollow cylindrical body portion 24 forming the blower chamber 23 interposed therebetween. The bolt and nut 12 are fastened together with the oil adsorber 2. In the blower chamber 23, there is provided a blower 25 for urging the exhaust gas from the blower chamber inlet 22 toward the exhaust inlet 5 of the inlet flange 6. The blower 25 is a propeller fan, and the diameters of the blower chamber inlet 22 and the inlet flange inlet 5 are set to be substantially the same as the fan diameter of the propeller fan. Therefore, the outlet diameter of the exhaust duct 3 is the same as the diameter of the blower chamber inlet 22.

The oil smoke generated by the operation of the oil rotary vacuum pump 1 passes through the exhaust duct 3 and proceeds to the blower chamber inlet 22. However, since the blower 25 is operated at the same time as the oil rotary vacuum pump 1, the exhaust duct 3 has a negative pressure. Has become. Then, the oil smoke entering the blower chamber 23 from the blower chamber inlet 22 is urged by the blower 25 to increase its pressure, enters the dispersion space 14 from the inlet 5 of the oil adsorber, passes through the dispersion plate 16, and oil is absorbed by the oil adsorbent 18. When adsorbed, they travel through the space between the oil adsorbents 18, pass through the outlet collecting plate 17, gather in the outlet collecting space 15, and are exhausted from the exhaust outlet 13 to the atmosphere.

In this embodiment, since the blower 25 pressurizes the oil rotary vacuum pump 1, there is no loss at the time of depressurization due to exhaust resistance, and the vacuum forming capability is secured.

FIG. 3 shows an example in which a blower is attached to the outlet side of the oil adsorber. The same functional portions as those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted. Only different portions will be described. A hollow cylindrical body 27 and a blower chamber outlet flange 28 are overlapped with the outlet flange 7, and these are fastened together with the oil adsorber 2 together with the bolt nut 12 to provide a blower chamber 29. Is provided with a blower 31 for urging the exhaust gas in the exhaust direction. The outlet 13 of the outlet flange 7 of the oil adsorber and the outlet 32 of the blower outlet flange 28 are matched to the fan diameter of the blower 31.

The operation of this embodiment is such that when the blower 31 is energized, the outlet 13 on the upstream side, the collecting space 15, the gap between the oil adsorbents 18, the dispersion space 14, the inlet 5 to the oil adsorber 2, the exhaust duct. Negative pressure is reached during 3. Therefore, the exhaust gas discharged from the exhaust port 4 of the oil rotary vacuum pump 1 has a decompressed space in the exhaust duct 3 → inlet 5 → dispersion space 14 → dispersion plate 16 → vacant space in the oil adsorbent 18 → collection plate 17 → It flows with a small resistance from the gathering space 15 → the outlet flange outlet 13 → the blower chamber 29, and is discharged into the atmosphere by the blower 31 through the outlet 32 of the blower chamber outlet flange 28.

[0018]

[Effect of the device]

 (1) In the present invention, since the oil adsorbent is loosely filled in the container, the exhaust resistance is small, and since the oil smoke does not pass through, the oil adsorbing effect is large, and the oil content in the exhaust gas released to the atmosphere is almost eliminated. (2) Since a transparent hollow cylinder is used for the container of the oil adsorber, it is possible to grasp the oil adsorption status of the oil adsorbent, and to replace the oil adsorbent in a timely manner. It does not pollute the environment when it is used as it disappears. (3) Since the transparent hollow cylinder is used as the container for the oil adsorbent, the filling state of the oil adsorbent can be known, and the oil adsorbent can be loosely and uniformly filled from the inlet side to the desired side. Quality can be secured.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a vertical sectional view of another embodiment of the present invention.

FIG. 3 is a vertical sectional view of still another embodiment of the present invention.

[Explanation of symbols]

 1 Oil Rotary Vacuum Pump 2 Oil Adsorber 3 Exhaust Duct 11 Transparent Hollow Cylinder 18 Oil Adsorbent 25 Blower 31 Blower

Claims (3)

[Scope of utility model registration request] 1. An oil-smoke adsorbing device equipped with an oil adsorber containing an adsorbent in a container in which one opening is communicated with the discharge port of an oil rotary vacuum pump and the other opening is communicated with the atmosphere. An oil smoke adsorbing device for an oil rotary vacuum pump, which is a transparent hollow cylinder sandwiched between an inlet flange and an outlet flange each having an opening serving as an inlet and an outlet, and is loosely filled with an oil adsorbent inside the container. . 2. An air blower chamber accommodating a blower for energizing oil smoke according to the flow is provided outside an inlet flange whose inlet opening communicates with the exhaust port of the oil rotary pump, and the blower chamber and the exhaust port of the oil rotary pump. The oil and smoke adsorbing device for an oil rotary vacuum pump according to claim 1, wherein 3. A blower chamber accommodating a blower for energizing oil smoke according to the flow is attached to the outside of the outlet flange whose outlet opening is open to the atmosphere, and an outlet opening is provided for communicating the blower chamber with the atmosphere. The oil smoke adsorbing device of the oil rotary vacuum pump according to claim 1.