JPH0677655B2 - Filter element in filter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention is to supply a liquid containing impurities such as water and oil to a filter to remove impurities by attaching them as a cake. The present invention relates to a filter element in a filter device.

(Prior Art) Conventionally, a filtering device is composed of, for example, a filtering tank and a clarifying liquid tank, and an appropriate number of filtering devices are provided in the filtering tank. The one proposed by the present applicant, which is one of the filter elements in this filter device, is known as JP-A-2-86807.

That is, the filter element disclosed in JP-A-2-86807 is
An elastic wire having a diameter of d is spirally wound n times in a state of being closely attached, and one end of this elastic wire is fixed and the other end is pulled in the longitudinal direction by a length of 1 or both ends of the elastic wire are fixed. The spiral pitch P of the elastic wire rod is kept substantially constant at P = 1 / nd by holding the elastic wire rod in a state of being pulled by a length of 1 in the longitudinal direction.

(Problems to be Solved by the Invention) By the way, when the above-described filter elements made of elastic wire rods having substantially constant spiral pitches P are arranged vertically and used for a long period of time, the elastic wire rods themselves move downward due to their own weight. The weight of the elastic wire may cause the lower spiral gap in the elastic wire to become smaller, resulting in clogging, and the upper spiral gap to become larger.

In this way, the gap between the upper and lower portions of the elastic wire in the longitudinal direction becomes unstable and becomes unstable, so that the filtering accuracy is deteriorated, and the filtering accuracy between the upper and lower portions varies, and the elastic wire remains stable for a long period of time. The problem of becoming unusable has arisen.

In order to improve the above problems, an object of the present invention is to maintain a stable state without causing a difference in the gap between the upper and lower portions of the elastic wire even after long-term use so that the filtration accuracy can be kept uniform. Another object of the present invention is to provide a filter element in the above filter device.

[Structure of Invention]

(Means for Solving the Problems) In order to achieve the above object, the filter element in the filter device of the present invention is an elastic member in which n turns are wound in a spiral shape and the gap between the spiral shapes is substantially constant ( 29) and locking portions (35) for locking in the spiral gaps of the elastic member (29) on both sides of the plate-shaped locking plate (33) extending in the longitudinal direction of the elastic member (29). A grip part for providing and locking the locking plate (33) by rotating the locking plate (33) at one end of the locking plate (33) so that the locking parts (35) enter into the gaps between the spirals while fitting. And a gap stabilizing member (31) provided with (33C).

(Operation) By adopting the filter element in the filter device of the present invention, the locking portion of the gap stabilizing member is locked from the inside in each of the gaps of the spiral in the longitudinal direction of the elastic wire. Even if the element is used for a long period of time, the gaps do not change due to the weight of the elastic wire and are held uniformly. Thus, this filter element can withstand long-term use in a stable state, and can obtain uniform filtration accuracy without variation in filtration accuracy.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to the drawings.

Referring to FIG. 4, the filtration device 1 is composed of a filtration tank 3 and a clarification liquid tank 5. A filtration tank 3 is provided in the filtration device 1.
A partition wall 7 for partitioning the clarification liquid tank 5 and the clarification liquid tank 5 is provided, and the partition wall 7 is provided with an appropriate number of filter elements 9 in the filter device facing downward. Of the filtration tank 3
A pipe 11 is connected to the lower left portion of the outer wall in FIG. 4, and a first valve 13 is provided in the middle of the pipe 11.

A pipe 15 is connected to the outer wall of the clarification liquid tank 5, for example, the lower part of the right side wall in FIG. 4, and a second valve 17 is provided in the middle of the pipe 15. A pipe 19 is connected to the outer wall of the clarification liquid tank 5, for example, the upper wall in FIG. 4, and a third valve 21 and an air tank 23 are provided in the middle of the pipe 19.

Further, a pipe 25 is connected to the outer wall of the filtration tank 3, for example, the lower wall in FIG. 4, and a fourth valve 27 is provided in the middle of the pipe 25.

In the filtering device 1 having the above structure, the first valve 13
Is opened and a liquid containing impurities such as water or oil is supplied to the filtration tank 3 through the pipe 11. A precoat is formed on the outer peripheral portion of a suitable number of filter elements 9 by the action of the filter aid supplied in advance to the filter tank 3, impurities adhere to the precoat, and the liquid obtained by filtering the impurities is the filter element 9
Through the inside of the tank, and is sent out as a clarified liquid to the clarified liquid tank 5 connected to the upper part of the filtration tank 3.

The clarified liquid in the clarified liquid tank 5 is sent out from the pipe 15 by opening the second valve 17.

By continuously repeating the above-described operation, the liquid containing impurities is filtered, but by performing filtration for a long period of time, impurities are successively attached to the outer peripheral portion of the filter element 9 to form the cake C. . If the cake C becomes large, the liquid flow from the outside to the inside of the filter element 9 is deteriorated and the filtering performance is deteriorated. Therefore, the cake C must be removed from the outer peripheral portion of the filter element 9.

As a means for removing the cake C from the outer peripheral portion of the filter element 9, the first valve 13 and the second valve 17 are closed in a state where the filtering tank 3 and the clarifying liquid tank 5 are filled with a liquid such as water. Then, when the fourth valve 27 is opened from the closed state at the same time or when there is water remaining to the extent that the filter element 9 part is thrown in, the third valve 21 is released from the closed state and compressed air is released. It is supplied from the air tank 23 through the pipe 19 into the refining liquid tank 5.

The sudden compressed air supplied into the clear liquid tank 5 is
Water as a clarifying liquid contained therein is pressed into the filter element 9 provided in the filtration tank 3. Thus, the water pressed into the filter element 9 overcomes the resistance of the water contained in the filter tank 3 and is ejected from the inside of the filter element 9 into the external filter tank 3. At that time, the filter element 9
The cake C made of impurities adhering to the outer peripheral portion of the filter element 9 is separated from the filter element 9 and floats in water, is discharged from the pipe 25 together with the water, and is attached to the outer peripheral portion of the filter element 9. The filter element 9 is cleaned by removing it easily and easily.

The filter element 9 is an elastic wire rod as shown in FIG.
29 and a gap stabilizing member 31 as shown in FIG. As shown in FIG. 2, the elastic wire 29 is made of, for example, stainless steel having a diameter d and is made of a uniform material, and is spirally wound n times in a substantially closely contacted state. Moreover, it is in a state of being extended by the length l in the longitudinal direction (vertical direction in FIG. 2).

Therefore, the length of the elastic wire 29 in the longitudinal direction is nd + l, the pitch of each spiral is substantially uniform P = 1 / nd, and the gap between the spirals is T = P−d. The elastic wire 29 means, for example, that after applying an external force within the elastic yield point in the longitudinal direction of the elastic wire 29 and then removing the external force, the original state is restored.

As shown in FIG. 3, the gap stabilizing member 31 includes a plate-like locking plate 33 extending in the longitudinal direction (vertical direction in FIG. 3) and both sides of the locking plate 33. , The gap of each spiral in the elastic wire 29 (T = P-
It is composed of a locking portion 35 made of a screw adapted to d). The screws of the locking portion 35 are provided at least as many as the spiral gap.

With the above structure, the elastic wire rod 29 in the state shown in FIG.
3, the grip portion 33C, which is the lower portion of the locking plate 33 in the gap stabilizing member 31 shown in FIG. 3, is gripped with a jig, for example, and the jig is rotated clockwise while the elastic wire 29 is inserted from below. By rotating the screw, the locking portion 35 of the screw is inserted into the gap of the spiral while entering into the state as shown in FIG. That is, the gaps of the spiral of the elastic wire 29 are locked by the locking portions 35 from the inside.

Therefore, in the filter element 9 as shown in FIG. 1, each locking portion 35 of the locking plate 33 of the clearance stabilizing member 31 is locked from the inside in each spiral clearance of the elastic wire 29. Therefore, even if the elastic wire 29 itself has its own weight in the downward direction, the gap between the upper and lower portions does not change at all. Therefore, even if you use it for a long time,
Since there is no difference between the upper and lower gaps and there is always a stable state, there is no variation in the filtration accuracy between the upper and lower gaps. Thus, it can be used in a stable state for a long time without causing clogging.

Now, the elastic wire 29 of diameter d = 1 mm is wound 10 mm in diameter and the number of turns n = 5.
When the elastic wire 29 is wound about 00 times in a state of being tightly wound, the length of the elastic wire 29 in the longitudinal direction is nd = 500 mm. In the longitudinal direction of the elastic wire 29, in FIG.
Holding the length of 25mm, 35mm or 50mm, the pitch P of each spiral is calculated by l / nd, and it is 50μ, 70μ or 100μ.
And a substantially uniform and uniform product can be obtained.

Similarly, an arbitrary pitch P can be obtained within a range of, for example, 10 μ to 100 μ, and the accuracy can be suppressed within a range of ± 10%. Furthermore, if the elastic wire 29 is spirally wound with a diameter of, for example, 10 mm to 30 mm, the elastic wire 29 can be wound in a tightly wound state, so that various filter elements 9 can be obtained.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. For example, in this embodiment, as shown in FIG.
Although an example in which two 35 are provided at opposite positions has been described, it is also possible to provide three or more locking portions 35.
However, one is unstable and is not preferable, and 2
The range of 6 to 6 is the most preferable.

〔The invention's effect〕

As can be understood from the above description of the embodiments, according to the present invention, the locking portion of the gap stabilizing member is locked from the inside in each gap of the spiral in the longitudinal direction of the elastic wire. Even when the filter element is used for a long period of time, each gap does not change due to its own weight of the elastic wire and can be held uniformly. Therefore, the filter element can withstand long-term use in a stable state, and can obtain uniform filtration accuracy without variation in filtration accuracy.

Further, since the grip portion is integrated with one end of the locking plate in the gap stabilizing member, when the grip portion is rotated by, for example, a jig or the like, the locking portion of the locking plate is twisted in each spiral of the elastic wire. Can be easily locked in the gap.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the filter element according to the present invention, FIG. 2 is a front view of an elastic wire which is a main part of the filter element, and FIG. 3 is a gap stabilizing part of the filter element. FIG. 4 is a front view of a working member, and FIG. 4 is a front view of a filtering device according to an embodiment of the present invention. 1 ... Filtration device, 3 ... Filtration tank 9 ... Filter element, 29 ... Elastic wire material 31 ... Gap stabilizing member, 33 ... Locking plate 35 ... Locking part

Claims (1)

[Claims] 1. An elastic member (29) wound in a spiral n times and having a substantially constant gap between the spirals, and a plate-like locking plate extending in the longitudinal direction of the elastic member (29). (33)
Locking portions (35) for locking the spirals of the elastic member (29) are provided on both sides of the spiral member, and the locking plate (33) is rotated at one end of the locking plate (33) to rotate the spirals. And a gap stabilizing member (31) provided with a grip portion (33C) for entering and locking each of the locking portions (35) while fitting the locking portions (35). A filter element in a device.