JPS6224080Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a double casing type turbo pump that allows pressure resistance tests of the external casing and suction and discharge piping to be easily performed for each piping system.

A conventional double casing turbo pump will be explained with reference to FIGS. 1 and 2. Figure 1 shows a longitudinal cross-sectional view of a conventional double casing type turbo pump.During pump operation, the suction flow path 01 side is in a relatively low pressure state, so the structure has poor pressure resistance compared to the discharge port 02 side. It's getting old. For this reason, pressure tests of the external casing 03 and the suction and discharge piping, which are periodically carried out at the installation site, are carried out by dividing the inside of the external casing 03 into the suction pressure side and the discharge pressure side and pressurizing each piping system. That is, Fig. 2 shows a longitudinal cross-sectional view of the outer casing 03 when conducting a pressure resistance test, but in conventional pressure tests, the rotor section together with the inner casing 04 is first taken out from the outer casing 03 due to strength considerations. After the pressure-resistant partition plate 0
5 partitions the inside of the external casing 03 into a suction pressure side and a discharge pressure side, and a pressure-resistant jig 06 divides the inside of the external casing 03 into a suction pressure side and a discharge pressure side.
3. It was necessary to close the shaft seals at both ends, which required a lot of labor and time, as well as restoration work.

In order to eliminate the above-mentioned drawbacks, the present invention proposes a double casing type turbo pump that enables pressure testing without removing the inner casing from the outer casing. It also has a pressure-resistant bulkhead having a fluid inlet around the rotating shaft, and includes a pressure-resistant jig that is inserted from both ends of the outer casing during a pressure test to close the fluid inlet and the shaft sealing portion of the outer casing. It is characterized by:

According to the present invention having the above configuration, the pressure-resistant partition wall with high strength is located inside the outer casing to partition the suction pressure side and the discharge pressure side, so that it is difficult to remove the inner casing from the outer casing. Instead, a pressure test can be performed simply by removing the bearing of the rotating shaft and inserting a pressure-resistant jig.

The present invention will be explained below based on the drawings.

FIG. 3 shows a vertical cross-sectional view of a double casing according to an embodiment of the present invention during a pressure resistance test. As is clear from the figure, there is a A pressure-resistant bulkhead 5 with an inlet 7 is fitted and the outer casing 3
The interior is partitioned into a suction pressure side and a discharge pressure side. This pressure-resistant partition wall 5 is integrated with the inner casing 4 and is not detached during the pressure test. A pressure-resistant jig 6 is inserted into both ends of the external casing 3 during a pressure-resistant test, and closes the fluid inlet 7 and the shaft sealing portion of the external casing 3. That is, the inside of the outer casing 3 is completely partitioned into a suction pressure side and a discharge pressure side by a pressure-resistant partition wall 5 and a pressure-resistant jig 6 in a state that can withstand a pressure test. The pressure resistance test can be performed while it is housed inside the outer casing 3.

Note that during pump operation, although not shown, a bearing or the like is attached to the position of the pressure-resistant jig 6, and the fluid sucked from the fluid suction channel 1 due to the rotation of the rotating shaft is controlled by the fluid flow. It is introduced into the internal casing 4 through the inlet 7, pressurized, and then discharged from the discharge port 2, and the presence of the pressure-resistant partition wall 5 does not cause any trouble in pump performance.

As specifically explained above, according to the present invention, there is no need to take out the inner casing from the outer casing during the pressure test, so the pressure test can be easily and quickly performed without any effort.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a conventional double casing turbo pump, Fig. 2 is a longitudinal sectional view of the same during a pressure resistance test, and Fig. 3 is a pressure resistance of a double casing turbo pump according to an embodiment of the present invention. It is a longitudinal cross-sectional view at the time of a test. 1...Fluid suction channel, 3...External casing,
4... Internal casing, 5... Pressure-resistant bulkhead, 6...
...Pressure resistant jig, 7...Fluid inlet.

Claims (1)

[Scope of utility model registration request] It has a pressure-resistant bulkhead that has a fluid inlet around the rotating shaft, which is attached to the end face of the fluid suction flow path of the inner casing, and is inserted from both ends of the outer casing during a pressure test, and is connected to the fluid inlet and the axis of the outer casing. A double casing turbo pump characterized by being equipped with a pressure-resistant jig that closes a sealing part.