JPS6246412Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for externally displaying the clogging state of a filter element in a filter device.

In general, the filter element of a filter device separates and removes impurities mixed into the fluid, so naturally the element itself becomes clogged, and as this clogging progresses, the cleaning efficiency decreases and pressure loss increases. This can lead to such inconvenient situations. Therefore, it is important to promptly and accurately detect clogging of the filter element in terms of maintenance and management of the filter element.

This invention was devised in consideration of the above points, and it is an object of the present invention to provide a device that can reliably detect the state of clogging of a filter element and quickly display this on the outside of the filter device. The purpose is to

Next, the device of this invention will be explained in detail based on the drawings.

A main body 7 includes a chamber 6 having a through hole 3 communicating with the primary side 2 of the filter element 1 and a through hole 5 communicating with the secondary side 4 of the filter element 1. A piston 8 is slidable in the chamber 6. A magnet 1 is attached to the end of the rod 9 of the piston 8.
0 is fixed, and this magnet 10 is attached to the main body 7.
It is movable within a hollow cylindrical guide 11 that is integrally formed with the guide 11. The piston 8 is placed in the chamber 6 by a spring 12 in a position that always closes the passage hole 3.
is forced by. In this case, a ring-shaped retaining ring 13 is fitted into the through hole 3 of the main body 7, and serves as a seat for preventing the piston 8 from coming off and closing the through hole 3.

A ring 14 made of a magnetic material is loosely fitted around the outer periphery of the guide 11, and a transparent pipe 15 surrounds the guide 11 on the outside of the ring 14.
is placed. This transparent pipe 15 is connected to the main body 7.
The cover 16 is screwed into and fixed in position via an O-ring 17, and the cover 16 is provided with a peephole 18 so that the ring 14 can be seen from the outside through the transparent pipe 15. It's getting old. In order to improve visibility, it is desirable that the outer periphery of the guide 11 and the ring 14 be colored with a contrasting color scheme.

An annular magnet 19 is attached within the end of the cover 16 on the side remote from the main body 7,
A suction ring 21 that is attracted to the magnet 19 is attached to the return rod 20 that penetrates the inside of the magnet 19 and has an end protruding outside the cover 16. A spring 22 is compressed between them.

In the above configuration, when the filter element 1 is less clogged, the differential pressure between the through holes 3 and 5 is small, and the piston 8 is held by the retaining ring 13 by the spring 12. However, as the filter element 1 gradually becomes clogged and a differential pressure occurs between the fluid pressures above and below the piston 8, this fluid pressure differential causes the piston 8, rod 9, and magnet 10 to move against the spring 12. The ring 14 moves upward and is attracted by the magnet 10.
also moves upward. By observing the movement of the ring 14 through the transparent pipe 15 through the viewing window 18, it is possible to visually see the process in which the filter element is gradually becoming clogged.

When the ring 14 moves further and becomes visible over the entire viewing window 18, the ring 14 is attracted to the attraction ring 21 magnetized by the annular magnet 19. In the device of this invention, the clogging state of the filter element in this state is defined as the specified clogging state of the filter element.

In addition, in this state, the magnetic force that attracts the ring 14 is greater than that of the magnet 10, so the operation of the circuit that uses the device installed with this device is stopped, etc.
Even if the differential pressure between the fluid pressure above and below the piston 8 no longer occurs and the piston 8, rod 9, and magnet 10 move downward due to the return force of the spring 12, the ring 14 remains adsorbed to the suction ring 21, so that the filter element The indication that the clogging has reached the specified level continues. To separate the ring 14 from the suction ring 21 and attract it to the magnet 10, push the return rod 2 against the spring 22.
0. If the suction ring 21 and ring 14 are pushed down, the suction ring 21 will separate from the annular magnet 19, so the suction ring 21 will move away from the annular magnet 19.
The influence of the magnetic force exerted by the ring 14 is weakened, and the ring 14 is attracted to the magnet 10. Except for the force pushing down the return rod 20 and suction ring 21,
Due to the return force of the spring 22, the rod 20
Then, the attraction ring 21 moves upward, and the attraction ring 21 is magnetized by the annular magnet 19 again. At this point, the device of this invention has been returned to its original state.

As mentioned above, according to the device of this invention, it is possible to continuously detect the clogging condition of the filter element from outside the device, and when the maximum set value is reached, the abnormality display is maintained even if the operation is stopped. It has a hold function and a reset function that allows you to easily release the hold.
Further, there are no blind spots in the horizontal direction, and the electrical detection device can be easily set up as shown in FIG. In the application example shown in FIG. 2, the differential pressure display switch is of a non-reset type because it can be held using an electrical circuit.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of the device of this invention, and FIG. 2 is a diagram showing an example of its application. In the figure, 1...filter element,
2...Primary side, 3...Through hole, 4...Secondary side, 5...
...Through hole, 6...Chamber, 7...Body, 8...Piston, 9...Rod, 10...Magnet, 11...
... Guide, 12 ... Spring, 13 ... Retaining ring, 14 ... Ring, 15 ... Transparent pipe, 16
... cover, 17 ... O-ring, 18 ... sight glass, 19 ... annular magnet, 20 ... return rod, 21 ... suction ring, 22 ... spring.

Claims (1)

[Scope of utility model registration request] A piston, which is normally loaded with an elastic force to close the primary side passages, is fitted into a chamber formed in the main body, which has passage holes communicating with the primary side and secondary side of the filter element, respectively, and this piston is inserted at one end. A magnet is attached to the other end of the rod attached to the rod, a ring is loosely fitted around the outer periphery of a hollow cylindrical guide that guides the magnet, and a transparent pipe surrounding the guide is connected to the main body on the outside of this ring. This cover is provided with a viewing window through which the appropriately colored guide and ring can be viewed from the outside, and an annular magnet mounted inside the end of the cover is passed through and the end is removed from the cover. A clogging indicator for a filter element in a filter device, comprising: a suction ring that is attracted to the annular magnet fixedly attached to a return rod protruding from the filter; and a spring compressed between the suction ring and the guide.