JPH0434888Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to the structure of a drain separator that separates and removes drain, oil mist, and dust contained in compressed gas such as steam, compressed air, or various high-pressure gases. It is something.

Prior Art Conventional drain separators have mainly used a combination of centrifugal force and collision effects to separate condensate and other condensate from gas. Regarding such a structure, there is a device as described in, for example, Japanese Utility Model Publication No. 48-45157. In the above device, as shown in FIG. 4, the gas flowing into the container 1 from the inflow pipe 2 passes through guide vanes 11 provided at several stages above and below.
The collision blade 12 moves downward in the direction of the arrow while repeatedly applying centrifugal force due to rotational motion and separating action due to collision. The descending gas reversely rises from the opening 13, enters the outflow pipe 3, passes through the filter 14, and flows out of the vessel. Containers such as drain that have been separated and accumulated at the bottom of the container are removed from the drain outlet 9.

Problems to be solved by the invention In the above structure, the gas flow is caused by the guide vane 1.
1, the gas is guided in the direction of applying centrifugal force, but the impingement blades 12 provided on the way are perpendicular to the gas flow in order to increase the impact at the time of collision and enhance the separation effect of the contained substances. It is desirable to provide it in a close direction. The more perpendicular the direction of the impinging vanes to the gas flow, the greater the resistance. As resistance increases, the gas flow rate decreases. If the flow velocity decreases, the centrifugal force effect will be drastically reduced. That is, the structure described above has the problem that the collision effect is mainly pursued and the centrifugal force effect is relatively ignored. On the other hand, providing the complicatedly shaped guide vanes 11 and collision vanes 12 within the narrow container 1 has a structural problem.

Therefore, in order to solve the above-mentioned conventional problems, the present invention has been developed by placing an appropriate position in the inflow pipe, on the one hand, to generate a swirling airflow with a centrifugal force effect in the vessel;
A relatively simple method, such as providing a nozzle hole with a certain angle and size, and placing a cylindrical vertical inner cylinder for gas outflow eccentrically with respect to the center of the container to give a smooth collision effect to the swirling airflow inside the container. The purpose of this structure is to effectively separate and remove contaminants such as drain.

Means for Solving the Problems The structure of the present invention to achieve the above purpose is as follows:
To explain this using FIGS. 1 to 3, the present invention has an inlet pipe having a gas inlet on one side of the upper part of a cylindrical container, an outlet pipe having an outlet on the other side, and a drain pipe at the bottom of the container. In a drain separator provided with an outlet, a pipe body P, in which an inflow pipe 2 and an outflow pipe 3 are integrally joined with a joint pipe 4 interposed, is installed in the diametrical direction inside the container 1, and a pipe body P is installed between the inflow pipe and the joint pipe. A separating plate 5 is provided to block the passage, a slightly downward nozzle hole 6 is provided at a position near the center between the inner wall of the container on the side of the inflow pipe and the center of the container, and a vertical inner cylinder 7 is installed at the bottom of the joint pipe. The vertical inner cylinder is vertically installed eccentrically with respect to the center, and has an oblique opening 8 at the lower end of the vertical inner cylinder, and a wire net 10 is fixed horizontally around the opening.

Function In the above means, when the compressed gas in the inflow pipe 2 flows into the container 1 from the nozzle hole 6 on the side surface at high speed, the gas flow from the nozzle hole 6 toward the inner wall of the container 1 is made easier to follow the inner wall. Since the nozzle hole is provided at the position, the gas flow becomes an airflow that swirls in the direction of the arrow along the inner wall. In addition, since the nozzle hole 6 is angled slightly downward, the swirling airflow descends toward the bottom of the vessel obliquely in the direction of the arrow. At this time, the swirling air current separates the contents such as drain by the centrifugal force of the swirling motion. On the other hand, since the cylindrical vertical inner cylinder 7 for gas outflow is vertically installed eccentrically with respect to the center of the container, the distance between the outer surface of the inner cylinder 7 and the inner wall of the container 1 is from the maximum distance on the L side in the figure. It changes smoothly up to the minimum interval on the R side. The swirling airflow passes between the outer surface and the inner wall of the inner cylinder and repeats the swirling motion, but when the gap changes from the maximum gap to the minimum gap, it smoothly collides with the outer surface and the inner wall of the inner cylinder, and the minimum gap occurs. Collision free when changing from spacing to maximum spacing. In this way, the swirling airflow descends toward the bottom of the vessel while separating the drain and the like by the smooth collision action against the wall surface. In particular, periodic changes in compression due to collision and expansion due to release synergize with the separation effect due to the centrifugal force to enhance the separation effect.

The swirling airflow, which has descended obliquely, crosses the horizontally installed wire net 10 before reaching the bottom of the vessel. Since the wire net adheres and separates fine particulate matter that cannot be easily separated by centrifugal force and collision action, the gas becomes highly dry. When the swirling airflow crosses the wire net, the swirling speed is rapidly reduced, reverses upward at the bottom of the vessel, enters the vertical inner cylinder 7 through the oblique opening 8, and flows out of the vessel through the outflow pipe 3. Drain accumulated at the bottom of the container is discharged from the drain outlet 9.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. 1 is a cylindrical container of a drain separator, 2 is an inflow pipe having an inlet 2a, 3 is an outflow pipe having an outlet 3a, and 4 is a joint pipe for inflow. It is interposed between the pipe 2 and the outflow pipe 3 and joins them together to form the pipe body P. The tube P is firmly installed in the upper part of the container 1 in the diametrical direction. Reference numeral 5 indicates a separation plate for blocking a passage provided between the inflow pipe 2 and the joining pipe 4;
A nozzle hole is provided on the side of the inflow pipe 2 for inflow into the container 1, and is located near the center between the inner wall and the center of the container so that the gas flow from the nozzle hole toward the inner wall of the container 1 can easily follow the inner wall. It will be done. When the position of the nozzle hole 6 approaches the inner wall side, the pressure of the gas that directly hits the inner wall increases, and a part of the inner wall is rapidly worn away. Furthermore, if the nozzle hole is located close to the center of the container, the swirling speed of the airflow will be weakened and the separation efficiency will be reduced. From this point of view, the nozzle hole is preferably located near the center between the inner wall and the center of the container, where the angle of incidence α with respect to the inner wall corresponds to about 120°. Further, the angle of the nozzle hole is set slightly downward so that the swirling airflow descends obliquely along the inner wall. If the downward angle β is large, the swirling airflow descends quickly, reducing the separation effect. The angle β is preferably around 15°. Moreover, if the size of the nozzle hole is small, the inflow resistance increases and the flow velocity of the airflow becomes weak. Reference numeral 7 denotes a cylindrical vertical inner tube that is vertically installed eccentrically with respect to the center of the container at the lower part of the joint tube 4, and a slanted opening 8 is provided at the lower end of the tube. It enters the vertical inner cylinder 7 and flows out of the vessel through the outflow pipe 3. Since the opening is slanted, the airflow at the bottom of the vessel collides with the opening and tends to reverse upward. When the swirling airflow passes between the outer surface of the vertical inner cylinder 7 and the inner wall of the container, it smoothly collides with the mural wall and separates the contents, but if the gap on the R side is narrow, the resistance due to collision increases and the flow speed and weaken the centrifugal force effect. Further, in order to continue periodic changes of compression and expansion in the swirling airflow, it is preferable that the interval on the R side is about half the interval on the L side. Reference numeral 10 denotes a wire net horizontally fixed around the opening 8, which fixes the inner cylinder to the inner wall and also attaches and separates particulate matter from the air flow. The fine particles adhering to the wire net gradually increase in amount and turn into water droplets, which fall through each horizontal mesh to the bottom of the vessel, but the descending air current directly hits each horizontal mesh, helping to keep it clean. The swirling speed of the swirling airflow rapidly decreases when it crosses the wire net 10, but by providing guide vanes G at the bottom of the vessel, the airflow can be used to remove condensate accumulated at the bottom of the vessel from the drain outlet 9. Can be easily discharged outside.

Effects of the invention Since the present invention has the above-described structure, the gas flowing into the container from the nozzle hole becomes a swirling air flow along the inner wall of the container and descends, separating drain etc. by the centrifugal force effect of the swirling motion. In addition, when the swirling airflow passes between the inner wall and the eccentric vertical inner cylinder, it separates the drain and the like while repeating a smooth collision action. Moreover, the periodic changes in compression and expansion at that time combine with the centrifugal force effect to further enhance the separation effect. Further, the descending swirling air current crosses the wire net before reaching the bottom of the vessel, separating particulate matter that cannot be easily separated by centrifugal force and collision action, and increasing the dryness of the gas. The swirling airflow that crosses the wire net reduces its velocity, reverses upwards at the bottom of the vessel, and is efficiently discharged from the oblique opening.

Although the present invention has a much simpler structure than the conventional structure, it exhibits a separation effect comparable to that of the conventional structure as described above. In particular, since the wire net is kept clean for a long period of time by the downdraft, there is no need to use the conventional divided structure for the container except in special cases.

In addition, in the present invention, in addition to the pipe body P, in which the inflow pipe and the outflow pipe are integrally joined via the joint pipe, firmly installed inside the container, the lower end of the vertical inner cylinder joined to the joint pipe is also Since it is firmly held within the container by the wire net, it has the effect of maintaining a stable separation effect even when subjected to rapid swirling motion of swirling air currents and repeated collision effects.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a drain separator according to an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a cross-sectional view taken along line 3-3 in Fig. 1. FIG. 4 shows a vertical cross-sectional view of a conventional drain separator. 1... Drain separator container, 2... Inflow pipe, 3... Outflow pipe, 4... Joint pipe, 5... Separation plate, 6... Nozzle hole, 7... Vertical inner cylinder, 8... Opening. , 9... Drain outlet, 10... Wire net, 11... Guide vane, 12... Collision vane.

Claims (1)

[Scope of utility model registration request] In a drain separator, an inflow pipe with a gas inflow port is provided on one side of the upper part of a cylindrical container, an outflow pipe with an outflow port is provided on the other side, and a drain outlet is provided at the bottom of the container. 3 and 3 are integrally joined with a joint pipe 4 interposed between them, and a pipe body P is installed in the diametrical direction inside the container 1, and a separator plate 5 for blocking the passage is provided between the inflow pipe and the joint pipe, and the side surface of the inflow pipe is A slightly downward nozzle hole 6 is provided at a position near the center between the inner wall of the container and the center of the container, and a vertical inner cylinder 7 is vertically installed eccentrically with respect to the center of the container at the bottom of the joint pipe. A drain separator having a structure in which a diagonal opening 8 is provided at the lower end and a wire net 10 is fixed horizontally around the opening.