JP4303180B2 - Inline filter - Google Patents

Description

  The present invention relates to an in-line filter that removes solid substances contained in a fluid.

FIG. 8 shows a conventional in-line filter. This filter is, for example, an air filter for purifying air supplied to a clean room.
Body portions 2a and 2b are attached to both ends of the element case 1, and joint portions 3a and 3b are fitted and fixed to the body portions 2a and 2b, respectively. The body portions 2a and 2b are screwed to the outer peripheral surface of the element case 1, and the confidentiality between the element case 1 and the body portions 2a and 2b is secured by O-rings 4a and 4b attached to both ends of the element case 1. Has been.

  With such a configuration, the air supplied from one joint portion 3a is purified by the element 5 in the element case 1, and the purified air is supplied from the other joint portion 3b to the supplied portion.

A configuration similar to such an in-line filter is disclosed in Patent Document 1.
Japanese Utility Model Publication No. 7-24426

  In the filter shown in FIG. 8, the O-rings 4a and 4b are brought into contact with the bottom surface of the receiving groove 6 formed in the element case 1 and the inner peripheral surfaces of the main body portions 2a and 2b, so Airtightness is secured.

  However, in such a configuration, when the main body portions 2a and 2b are screwed into the element case 1, the inner peripheral surfaces of the main body portions 2a and 2b contacting the O-rings 4a and 4b slide while rotating. For this reason, the O-rings 4a and 4b are twisted to deteriorate the airtightness, or the O-rings 4a and 4b are rubbed to generate particles, and the particles enter the main body portions 2a and 2b, and particularly the main body portion 2b. There is a problem that particles entering the inside are mixed into the purified air.

  Further, in order to smoothly slide the O-rings 4a and 4b and the main body portions 2a and 2b during assembly, it is necessary to apply lubricating oil to the sliding portions, but the application work is complicated when the element is replaced. In addition, there is a problem that the lubricating oil is mixed into the purified air.

  The filter described in Patent Document 1 has a configuration in which an O-ring is pressure-bonded between the filter main body and the element case, and therefore friction does not occur between the O-ring and the filter main body or the element case.

  However, a filter main body that accommodates the element case is required, and the primary port is configured to ensure airtightness inside and outside by the packing held by the cap based on the elastic force of the snap ring, so the number of parts increases. There is a problem of doing.

  In addition, when the elastic force of the snap ring is weak, it is difficult to ensure airtightness, and when the elastic force of the snap ring is too strong, the element replacement operation becomes complicated. Therefore, there is a problem that adjustment of the elastic force of the snap ring becomes complicated.

  An object of the present invention is to provide an in-line filter that prevents an increase in the number of parts, simplifies element replacement work, and prevents generation of particles from a sealing member while ensuring airtightness. .

  The object is to provide a cylindrical element case containing an element, a joint part to be attached to both ends of the element case, a body part for fixing the joint part to both ends of the element case, and the element. In an in-line filter having a sealing member for sealing the inside and outside of the case, the sealing member is mounted between the element case and the joint portion, and the main body portion is connected to the axial direction of the element case by a coupling means. This is achieved by an in-line type filter that moves and seals the sealing member between the joint portion and the element case in the axial direction.

  Further, the object is to provide a cylindrical element case containing an element, a joint portion attached to both end portions of the element case, and a main body portion for fixing the joint portion to both end portions of the element case, In an in-line filter having an O-ring that seals the inside and outside of the element case, the O-ring is mounted in mounting grooves provided at both ends of the element case, and the body portion is axially connected to the element case by a coupling means. This is achieved by an in-line filter that sandwiches the O-ring in the axial direction of the element case between the side surface of the mounting groove and the joint portion.

  According to the present invention, it is possible to provide an inline filter that can prevent an increase in the number of parts, simplify element replacement, and prevent generation of particles from the sealing member while ensuring airtightness. .

(First embodiment)
A first embodiment of the present invention will be described below with reference to FIGS. Attachment grooves 13 are formed at both ends of the outer peripheral surface of the element case 12 that accommodates the element 11, and O-rings 14 are attached to the attachment grooves 13 as sealing members. Male screws (coupling means) 19 are engraved on the outer peripheral surfaces of both ends of the element case 12.

  Joint portions 15 a and 15 b are fitted to both ends of the element case 12. Flange 16a, 16b which contact | abuts to the end surface of element case 12 is formed in this joint part 15a, 15b, respectively.

  The main body portions 17a and 17b for fixing the joint portions 15a and 15b to the element case 12 are formed in a bottomed cylindrical shape, and the joint portions 15a and 15b are formed on the bottom portion except for the flanges 16a and 16b. A through-hole 18 that can be inserted is formed.

A female screw (coupling means) 20 that can be screwed into the male screw 19 of the element case 12 is engraved on the inner peripheral surface of the distal end portion of the main body portions 17a and 17b.
When assembling the in-line filter configured as described above, an O-ring 14 is mounted in the mounting groove 13 of the element case 12 that houses the element 11. Next, joint portions 15a and 15b are fitted to both ends of the element case 12, and the main body portions 17a and 17b are fitted and inserted into the joint portions 15a and 15b, and the female screw 20 is screwed into the male screw 19.

  Then, as shown in FIG. 2, the O-ring 14 is compressed between the side surface of the mounting groove 13 and the flanges 16a and 16b, and airtightness between the element case 12 and the joint portions 15a and 15b is secured.

With the inline filter configured as described above, the following operational effects can be obtained.
(1) The airtightness between the element case 12 and the joint portions 15a and 15b can be ensured by the O-ring 14 sandwiched between the element case 12 and the joint portions 15a and 15b.
(2) The O-ring 14 is clamped in the axial direction of the element case 12 between the flanges 16 a and 16 b and the side surface of the mounting groove 13 by screwing the main body portions 17 a and 17 b to the element case 12. . At this time, the flanges 16a and 16b and the element case 12 are hardly rotated relative to each other. Therefore, it is possible to prevent the occurrence of airtight failure due to the twist of the O-ring 14.
(3) When the O-ring 14 is sandwiched between the flanges 16a and 16b and the side surface of the mounting groove 13, the O-ring 14 is not rubbed. Therefore, generation of particles from the O-ring 14 can be prevented in advance.
(4) The airtightness of both end portions of the element case 12 can be sealed with the body portions 17a and 17b, the joint portions 15a and 15b, and the O-ring 14 having the same configuration. Therefore, the structure is simplified and the number of parts is not increased.
(5) The O-ring 14 does not slide with respect to the flanges 16 a and 16 b and the mounting groove 13. Therefore, it is not necessary to apply lubricating oil, so that the element 11 can be easily replaced. Further, it is possible to prevent the lubricating oil from being mixed into the purified air.
(6) When the element 11 is replaced, the main body portions 17a and 17b may be removed from the element case 12, and the main body portions 17a and 17b may be screwed into the element case 12 again after the element 11 is replaced. Accordingly, the element 11 can be easily replaced.
(Second embodiment)
3 and 4 show a second embodiment. The same components as those in the first embodiment will be described with the same reference numerals.

  The element case 21 is the same as that of the first embodiment except that flanges 22a and 22b are formed at both ends thereof. Mounting plates 23a and 23b are fitted to the center side of the element case 21 of the flanges 22a and 22b, respectively.

  As shown in FIG. 4B, the mounting plates 23 a and 23 b are divided into left and right parts and can be fitted from both sides of the element case 21. The mounting plates 23a and 23b are formed in a substantially square shape, and screw holes 24 are formed in the four corners, respectively.

Attachment grooves 13 are formed at both ends of the element case 21, and O-rings 14 are attached to the attachment grooves 13.
Joint portions 25 a and 25 b are fitted to both ends of the element case 21. Flange 26a, 26b which contacts the end surface of element case 21 is formed in this joint part 25a, 25b, respectively.

  The main body portions 27a and 27b for fixing the joint portions 25a and 25b to the element case 21 are formed in the shape of a rectangular tube having the same outer shape as the mounting plates 23a and 23b, and a fitting hole is formed in the center portion thereof. 28 is formed. The fitting hole 28 is provided with a step 29 in contact with the flanges 26a and 26b at an intermediate portion in the axial direction.

Further, insertion holes 31 for inserting the screws 30 are formed at positions corresponding to the screw holes 24 at the four corners of the main body portions 27a and 27b.
In the case of assembling the in-line filter configured as described above, the joint portions 25a and 25b are fitted to the end portions of the element case 21 in a state where the O-ring 14 is mounted in the mounting groove 13, and the mounting plate 23a, 23 b is fitted inside the flanges 22 a and 22 b of the element case 21. And the main-body parts 27a and 27b are fitted to the joint parts 25a and 25b, and the level | step difference 29 is made to contact | abut to the flanges 26a and 26b.

  In this state, the screw 30 is inserted into the insertion hole 31 and screwed into the screw hole 24 of the mounting plates 23a and 23b. When the edges of the main body portions 27a and 27b are screwed in until they contact the mounting plates 23a and 23b, the joint portions 25a and 25b are press-fitted into the element case 21, and the O-ring 14 is connected to the flanges 26a and 26b and the mounting groove 13. Compressed between the sides.

In the inline filter configured as described above, the following operational effects can be obtained in addition to the operational effects obtained in the first embodiment.
(1) The O-ring 14 can be clamped by screwing the screws 30 into the mounting plates 23a and 23b without rotating the main body portions 27a and 27b with respect to the joint portions 25a and 25b. Therefore, the joint portions 25a and 25b are not rotated, and sliding does not occur between the flanges 26a and 26b and the O-ring 14, so that generation of particles from the O-ring 14 can be prevented. Can do.
(Third embodiment)
5 and 6 show a third embodiment. The same components as those in the first or second embodiment will be described with the same reference numerals.

  The element case 32 is the same as that of the first embodiment except that flanges 33a and 33b are formed at both ends thereof. As shown in FIG. 6, the flanges 33 a and 33 b are formed in line symmetry on a part of the outer peripheral surface of the element case 32.

  The main body portions (first main body portions) 34a and 34b are formed in a rectangular tube shape, and a circular insertion hole 35 larger than the diameter of the element case 32 is formed in the center portion thereof. A fitting hole 36 that allows the element case 32 to be fitted is formed at the tip of the insertion hole 35, and a recess 37 having a shape corresponding to the flanges 33 a and 33 b is formed in the fitting hole 36. Yes.

  Accordingly, when the element case 32 is inserted into the fitting hole 36 with the recess 37 aligned with the flanges 33a and 33b, as shown in FIG. 5, the element until the fitting hole 36 reaches the inside of the flanges 33a and 33b. The case 32 can be inserted. Then, if the main body portions 34a and 34b are rotated 90 ° relative to the element case 32 from this state, the flanges 33a and 33b are brought into contact with the stepped portion between the fitting hole 36 and the insertion hole 35 as shown in FIG. In contact therewith, the main body portions 34 a and 34 b are supported so as not to move in the direction of the end portion of the element case 32. A female screw 38 is engraved on the inner peripheral surfaces of the base end portions of the main body portions 34a and 34b.

  The plugs (second main body portions) 39a and 39b are formed in a cylindrical shape into which the joint portions 25a and 25b can be inserted, and a step 40 is formed on the inner peripheral surface thereof to contact the flanges 26a and 26b. ing. A male screw 41 that can be screwed into the female screw 38 is formed on the outer peripheral surface of the tip of the plugs 39a and 39b.

  In the case of assembling the in-line filter configured as described above, the joint portions 25a and 25b are fitted to the end portion of the element case 32 in a state where the O-ring 14 is attached to the mounting groove 13, and the main body portion 34a, 34b is inserted into the element case 32, the fitting hole 36 is positioned inside the flanges 33a and 33b, and is brought into contact with the flanges 33a and 33b.

  Next, when the plugs 39a and 39b are screwed into the main body portions 34a and 34b, the step 40 comes into contact with the flanges 26a and 26b of the joint portions 25a and 25b, and when the plugs 39a and 39b are further screwed from this state, the O-ring 14 Is compressed between the flanges 26 a and 26 b and the side surface of the mounting groove 13.

With the inline filter configured as described above, it is possible to obtain the same operational effects as those of the first embodiment.
(Fourth embodiment)
FIG. 7 shows a fourth embodiment. In this embodiment, a sealing member sandwiched between a joint portion and an element case is attached to a reduced diameter portion provided in the joint portion. The same components as those in the first embodiment will be described with the same reference numerals.

  A flange 53 is formed on the joint portion 52 that can be fitted to the element case 51, and a reduced diameter portion 54 is formed on a side surface of the flange 53 that faces the element case 51. An annular sealing material 55 is attached to the reduced diameter portion 54 as a sealing member, and the sealing material 55 is sandwiched between the flange 53 and the element case 51.

  In order to assemble such an inline filter, a joint portion 52 in which a sealing material 55 is attached to a reduced diameter portion 54 is fitted to the element case 51. Then, similarly to the first embodiment, the sealing material 55 is sandwiched between the flange 53 and the element case 51 by screwing the main body portion 17 b into the element case 51.

With such a configuration, it is possible to obtain the same operational effects as those of the first embodiment.
Each of the above embodiments may be implemented in the following manner.
In the second and third embodiments, the mounting plates 23a and 23b and the main body portions 34a and 34b may be positioned by grooves provided in the element cases 21 and 32.
-Instead of the O-ring, a ring having a V-shaped, U-shaped or Y-shaped cross section, or a flat packing or gasket may be used as a sealing member.

It is sectional drawing which shows 1st embodiment. It is a principal part enlarged view which shows 1st embodiment. It is sectional drawing which shows 2nd embodiment. (A) (b) is a side view which shows 2nd embodiment. It is sectional drawing which shows 3rd embodiment. It is a side view which shows 3rd embodiment. It is a side view which shows 4th embodiment. It is sectional drawing which shows a prior art example.

Explanation of symbols

11 Element 12, 21, 32, 51 Element case 13 Mounting groove 14 Sealing member (O-ring)
15a, 15b, 25a, 25b, 52 Joint portion 16a, 16b, 26a, 26b, 53 Flange 19, 20 Coupling means (male screw, female screw)
23a, 23b, 24, 30 coupling means (mounting plate, screw hole, screw)
38, 41 coupling means (female thread, male thread)
54 Reduced diameter part

Claims (8)

A cylindrical element case containing the element;
Joints attached to both ends of the element case;
A body portion for fixing the joint portion to both end portions of the element case;
In-line filter provided with a sealing member for sealing the inside and outside of the element case,
The sealing member is mounted between the element case and the joint portion,
An in-line filter, wherein the main body portion is moved in the axial direction of the element case by a coupling means, and the sealing member is sandwiched in the axial direction between the joint portion and the element case. A cylindrical element case containing the element;
Joints attached to both ends of the element case;
A body portion for fixing the joint portion to both end portions of the element case;
In an inline filter including an O-ring that seals the inside and outside of the element case,
Attach the O-ring to mounting grooves provided at both ends of the element case,
The main body is moved in the axial direction of the element case by a coupling means, and the O-ring is clamped in the axial direction of the element case between a side surface of the mounting groove and the joint portion. Inline type filter. The coupling means includes
A male screw formed on the outer peripheral surface of the element case;
3. The in-line filter according to claim 1, wherein the in-line type filter is constituted by a female screw formed on the main body so as to be screwed onto the male screw. The coupling means includes
A fitting plate fitted with the element case and provided with a screw hole;
The in-line filter according to claim 1, wherein the in-line filter is constituted by a screw inserted into the main body portion and screwed into the screw hole.   The mounting plate is positioned in the screwing direction by a flange formed on the outer peripheral surface of the element case, and the main body can be pressed toward the mounting plate by screwing the screw into the screw hole of the mounting plate. The in-line filter according to claim 4, wherein   6. The inline filter according to claim 4 or 5, wherein the mounting plate is divided into two parts so as to be fitted to the element case from the side of the element case. The main body portion includes a first main body portion positioned in the coupling direction of the coupling means with respect to the element case, and a second main body portion positioned in the coupling direction of the coupling means with respect to the joint,
The in-line filter according to claim 1 or 2, wherein the coupling means comprises a male screw formed on one of the first and second main body portions and a female screw formed on the other.   A flange is provided on the outer peripheral surface of the element case, the flange is formed in line symmetry with respect to the center of the element case, and the first main body has a fitting hole through which the element case can be inserted. An insertion hole having a diameter larger than the fitting hole, the fitting hole is provided with a recess through which the flange can be inserted, and the flange is inserted from the recess into the insertion hole. 8. The inline filter according to claim 7, wherein the first main body can be positioned in the coupling direction by engaging the flange with a step with the fitting hole.

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