JP2018053783A - Electromagnetic vibration type diaphragm pump - Google Patents

Abstract

[Problem] To provide an electromagnetic vibrating diaphragm pump that can reduce corrosion of a housing caused by a fluid and maintain airtightness inside the housing. [Solution] An electromagnetic vibrating diaphragm pump 1 houses a vibrator 4, a diaphragm 5, and an electromagnet 3, and has at least one first opening 31A into which both ends 4C, 4C of the vibrator can enter during reciprocating motion, and includes a subframe 30 made of resin, a first seal member 50 made of resin that covers the first opening, a pair of first frames 10A and second frames 10B that sandwich a lid body together with the subframe, and upper bolts 14A, 14B and lower bolts 18A, 18B that fasten the first frame and second frame together, and the pair of first frames and second frames fastened by the upper bolt and lower bolt press the lid body against the subframe in one direction D. [Selected Figure] Figure 4

Description

  The present invention relates to an electromagnetic vibration type diaphragm pump.

  A vibrator having a magnet is reciprocated by alternating current driving of an electromagnet, and a diaphragm fixed to both ends of the vibrator is vibrated to suck and discharge a fluid such as gas or liquid. For example, an electromagnetic vibration type diaphragm Pumps are known. For example, Patent Document 1 includes a vibrator in which a magnet made of a permanent magnet or the like is fixed, a diaphragm made of rubber or the like provided at both ends of the vibrator, and an electromagnet arranged to face the magnet. An electromagnetic vibration type diaphragm pump is disclosed which is provided and is housed in a metal casing.

  The housing of such an electromagnetic vibration type diaphragm pump has an opening outside the portion where the diaphragm is arranged in order to assemble the components such as the vibrator in the housing or replace the components during maintenance. Is formed. The casing forms a sealed space by being fixed in a state where the opening is covered with a metal lid.

JP 2008-150959 A

  Such a casing is often made of a metal material. The interior of the housing is a portion that comes into contact with water or water vapor (hereinafter collectively referred to as “fluid”), and there is a risk of corrosion in a metal housing. Therefore, it is conceivable to form the housing with a resin material instead of the metal housing. However, in this case, a problem occurs in the fastening force between the housing and the lid. That is, in a normal fixing method using a screw or an insert nut or the like, there is a possibility that the fastening force decreases due to a creep phenomenon peculiar to a resin, and fluid leaks from the housing.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnetic vibration type diaphragm pump capable of reducing corrosion of a casing due to a fluid and maintaining airtightness in the casing.

  The electromagnetic vibration type diaphragm pump of the present invention includes a vibrator having a magnet fixed thereto, an electromagnet provided to face the magnet of the vibrator and reciprocating the vibrator in one direction, and at least one end in one direction of the vibrator. An electromagnetic vibration type diaphragm pump comprising a diaphragm provided in a portion and a housing for accommodating a vibrator, an electromagnet, and a diaphragm, and housing the vibrator, the diaphragm, and the electromagnet, and at the time of reciprocating motion of the vibrator A pair of housings having at least one opening into which one end can enter and formed of resin, a lid that covers the opening and formed of resin, and a pair of the lid that is sandwiched together with the housing A pair of clamping parts provided with a clamping part and a fastening part that fastens the clamping parts to each other, and presses the lid body in one direction against the housing.

  In the electromagnetic vibration type diaphragm pump, since the casing is made of resin, corrosion can be reduced as compared with a casing formed of a metal material. Further, the lid covers the opening by being pressed in one direction against the housing by a pair of clamping portions fastened by the fastening portions. That is, since the lid is fixed to the casing without using screws or insert nuts, the fastening force is reduced due to a creep phenomenon specific to the resin, and fluid does not leak from the casing. As a result, corrosion of the casing due to the fluid can be reduced, and airtightness in the casing can be maintained.

  As for the clamping part, the part mutually fastened by the fastening part and the part which mutually contacts may be formed with the metal material. This electromagnetic vibration type diaphragm pump can reduce the looseness of the fastening portion.

  The lid may have elasticity. In this electromagnetic vibration type diaphragm pump, since the adhesion between the lid and the casing is enhanced, the airtightness in the casing can be further enhanced.

  The electromagnetic vibration type diaphragm pump further includes a holding member that holds the diaphragm, the casing has a positioning portion that can fit the holding member inside the opening in one direction, and the lid body includes the positioning portion. The opening may be covered in a state where it is in contact with the holding member in a state of being fitted into the.

  The holding member has a rib protruding in one direction and a boss protruding in one direction than the rib, the lid has an insertion part through which the boss can be inserted, and the boss is inserted into the insertion part. In this state, the rib may be in contact with the holding portion, and the rib may be held between the holding portion and the lid. In this electromagnetic vibration type diaphragm pump, the holding member is firmly fixed because it is pressed to the inside of the housing through the boss by the holding portion. Further, since the lid is sandwiched between the sandwiching portion and the rib, it is possible to prevent fluid from leaking from the inside of the housing to the sandwiching portion side, and in particular, the effect of suppressing liquid is high.

  You may further provide the sealing member which consists of a frame-shaped elastic material pinched | interposed between a housing | casing and a clamping part and larger than the external shape of a cover body. In this electromagnetic vibration type diaphragm pump, it is possible to effectively prevent the fluid from leaking from the inside of the housing to the outside, and in particular, the effect of suppressing the gas is high.

  ADVANTAGE OF THE INVENTION According to this invention, while reducing the corrosion of the housing | casing by a fluid, the airtightness in a housing | casing can be maintained.

It is a disassembled perspective view which shows the electromagnetic vibration type diaphragm pump of one Embodiment. It is a perspective view which shows the housing | casing of FIG. It is a perspective view which shows the clamping part of FIG. It is a perspective view which shows the housing | casing clamped by the clamping part in FIG. It is a front view which shows the holding member of FIG. (A) It is a front view which shows the 1st seal member fixed to the holding member of FIG. (B) It is sectional drawing which expands and shows the holding member to which the 1st seal member of FIG. 1 was fixed. It is a perspective view which shows the clamping part used for the electromagnetic vibration type diaphragm pump which concerns on a modification.

  Hereinafter, an electromagnetic vibration type diaphragm pump 1 (hereinafter simply referred to as “diaphragm pump 1”) according to an embodiment will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 1, the diaphragm pump 1 includes an electromagnet 3, a vibrator 4, a diaphragm 5, a subframe (housing) 30, a main frame (a pair of clamping portions) 10, and a holding member 40. The first seal member (lid body) 50 and the second seal member 60 are provided.

  The electromagnet 3 is disposed so as to face the main surface of the support member 4 </ b> A of the vibrator 4. The electromagnet 3 is driven by an alternating current, for example. The electromagnet 3 has an exciting coil formed by winding an electric wire around an iron core (core). In the exciting coil, when an alternating current flows, the polarity that appears in the core changes depending on the phase of the alternating current. The pair of electromagnets 3 are formed to have opposite polarities.

  The vibrator 4 includes a support member 4A extending in one direction D and a magnet 4B. The support member 4A is a plate-like body made of, for example, a nonmagnetic material. The magnets 4B and 4B are, for example, permanent magnets, and two magnets are arranged so that the S pole and the N pole appear on each main surface of the support member 4A.

  The diaphragms 5 are provided at both ends in one direction D of the vibrator 4. Specifically, the diaphragm 5 is fixed to the subframe 30 while being held by a holding member 40 described in detail later. The diaphragm 5 is formed into a circular plate-like body by an elastic material such as polyethylene propylene rubber (EPDM), fluorine rubber, silicon (Si), natural rubber (NR), or nitrile rubber (NBR). Has been.

  As shown in FIG. 1 and FIG. 2, the subframe 30 is made of a resin material such as PPS (polyphenylene sulfide resin) in consideration of water resistance and temperature, for example, and includes an electromagnet 3, a vibrator 4, and a diaphragm 5. It is formed so that it can be accommodated. The subframe 30 may be formed of a resin material such as PBT (polybutylene terephthalate resin), ABS resin, or PP (polypropylene) in addition to the PPS. The subframe 30 includes a main body 31, a pair of first openings (openings) 31A and 31A, a positioning part 35, a second opening 37, a cover 37A, a suction pipe 38A, and a discharge pipe 38B. A suction chamber (not shown) and a discharge chamber (not shown).

  The main body 31 is formed in a cylindrical shape, and a pair of first ends 4C, 4C of the vibrator 4 can enter into both ends in the reciprocating motion direction (one direction D) of the vibrator 4 during the reciprocating motion. Openings 31A and 31A are formed. The positioning portion 35 is formed inside the first openings 31A and 31A in the one direction D so that the holding member 40 described in detail later can be fitted. The inner peripheral surface 34 </ b> A of the positioning portion 35 is formed slightly larger than the outer peripheral surface 40 </ b> A of the holding member 40. The positioning part 35 is a part for fixing the holding member 40. The second opening 37 is formed in a size that allows insertion of an electromagnet unit composed of a pair of electromagnets 3. The second opening 37 is covered with a cover 37A. The cover 37A is fixed to the main body 31 with bolts 37B and the like.

  As shown in FIGS. 1 and 5, the holding member 40 includes a body portion 41, an insertion hole 41 </ b> A, a boss 42, a rib 43, a partition portion 44, a suction valve 45, and a discharge valve 46. Have. An insertion hole 41 </ b> A is formed in the main body portion 41 and penetrates in the thickness direction (one direction D) of the main body portion 41. The diaphragm 5 is disposed in the insertion hole 41A. Specifically, the diaphragm 5 is fixed by sandwiching an inner center plate 5B and an outer center plate 5D made of resin or metal through spacers 5A and 5C, respectively.

  As shown in FIGS. 5 and 6, the boss 42 protrudes from the main body 41 in one direction D and has a cylindrical shape. Six bosses 42 are formed in the main body 41 of the present embodiment. A rib 43 surrounding the boss 42 is formed on the outer peripheral side of the boss 42. The rib 43 protrudes from the main body 41 in one direction D and has a cylindrical shape. Six ribs 43 are formed in the main body 41 of the present embodiment. The boss 42 has a larger amount of protrusion from the main body 41 than the rib 43. The boss 42 and the rib 43 are integrally formed with the main body 41. The partition part 44 protrudes from the main body part 41 in one direction D, and exhibits a plate shape. The partition 44 is formed so as to surround the insertion hole 41 </ b> A, the suction valve 45, and the discharge valve 46, and a compression chamber 47 is formed by a space surrounded by the first seal member 50, the partition 44, and the main body 41. Is done.

  The suction valve 45 is disposed between the suction chamber formed in the subframe 30 and the compression chamber 47. The suction valve 45 is a valve that opens when the pressure in the compression chamber 47 becomes lower than that in the suction chamber, and allows fluid to flow from the suction chamber to the compression chamber 47 in one direction. The discharge valve 46 is disposed between the discharge chamber formed in the main body 31 and the compression chamber 47. The discharge valve 46 is a valve that opens when the pressure in the compression chamber 47 becomes higher than that in the discharge chamber, and allows fluid to flow from the compression chamber 47 to the discharge chamber in one direction. That is, the fluid sucked through the suction pipe 38 A by the diaphragm that vibrates by the reciprocating motion of the vibrator 4 enters the compression chamber 47 from the suction chamber through the suction valve 45. Next, the fluid sucked into the compression chamber 47 enters the discharge chamber from the compression chamber 47 via the discharge valve 46, and is discharged outside through the discharge pipe 38B from the discharge chamber.

  As shown in FIGS. 1 and 6, the first seal member 50 is a resin member having elasticity, such as polyethylene propylene rubber (EPDM) fluororubber, silicon (Si), natural rubber (NR), or nitrile rubber ( NBR) or the like. Six insertion portions 51 are formed in the first seal member 50. The first seal member 50 is pressed by the main frame 10 (the first frame 10A and the second frame 10B) and the rib 43, which will be described in detail later, with the boss 42 of the holding member 40 inserted. Thus, the main body 41 is closely attached. The thickness T of the first seal member 50 can be made larger than the difference H between the protruding amount of the boss 42 and the protruding amount of the rib 43. As a result, the main body 41 is arranged in close contact. As described above, the compression chamber 47 is formed by the space surrounded by the first seal member 50, the partition portion 44, and the main body portion 41. In other words, the first seal member 50 functions to pack the first openings 31 </ b> A and 31 </ b> A of the subframe 30.

  The second seal member 60 is sandwiched between the sub frame 30 and the main frame 10 and is larger than the outer shape of the first seal member 50 and is made of a frame-like elastic material. The second seal member 60 of the present embodiment is disposed outside the edge portion 50 </ b> A of the first seal member 50. The second seal member 60 is made of a material such as polyethylene propylene rubber (EPDM), fluorine rubber, silicon (Si), natural rubber (NR), or nitrile rubber (NBR), for example.

  As shown in FIGS. 1 and 3, the main frame 10 includes a first frame 10 </ b> A and a second frame 10 </ b> B that sandwich the subframe 30. The first frame 10A and the second frame 10B are made of a metal material such as aluminum (including die-cast), stainless steel, iron, or brass. The first frame 10A and the second frame 10B are respectively sandwiched portions 11A and 11B, upper beam portions 12A and 12B, upper contact portions 13A and 13B, lower beam portions 16A and 16B, and lower contact portions 17A and 17B. And have.

  The sandwiching portions 11A and 11B are plate-like members that are arranged to face each other when the first frame 10A and the second frame 10B are fastened, and are perpendicular to the main surface (one direction D in the assembled state). ) Is larger than the first seal member 50 in plan view. The upper beam portions 12A and 12B and the lower beam portions 16A and 16B are rod-shaped members that extend along the one direction D from the sandwiching portions 11A and 11B, respectively. The upper contact portions 13A and 13B and the lower contact portions 17A and 17B are disposed at one end of the upper beam portions 12A and 12B and the lower beam portions 16A and 16B. The upper contact portion 13A and the upper contact portion 13B are formed with surface contact portions that can be in surface contact with each other. The lower contact portion 17A and the lower contact portion 17B are formed with surface contact portions that can be in surface contact with each other. The sandwiching portion 11A, the upper beam portion 12A, the upper contact portion 13A, the lower beam portion 16A, and the lower contact portion 17A are joined or integrally formed by welding. Similarly, the sandwiching portion 11B, the upper beam portion 12B, the upper contact portion 13B, the lower beam portion 16B, and the lower contact portion 17B are joined to each other by welding or integral molding.

  The upper bolts (fastening portions) 14A and 14B and the lower bolts (fastening portions) 18A and 18B are fastened to the first frame 10A and the second frame 10B. More specifically, the first frame 10A and the second frame 10B are fastened by the upper bolts 14A and 14B while the upper contact portion 13A and the upper contact portion 13B are in surface contact with each other (metal touch), and the lower contact. The part 17A and the lower contact part 17B are fastened by the lower bolts 18A and 18B in a state where they are in surface contact with each other (metal touch). In the present embodiment, the bolt is described as an example of the fastening portion. However, the present invention is not limited to this. For example, a configuration in which the members are fastened by a bolt, a nut, or the like may be used.

  As shown in FIGS. 1 and 4, the pair of first frame 10 </ b> A and second frame 10 </ b> B fastened by the upper bolts 14 </ b> A and 14 </ b> B and the lower bolts 18 </ b> A and 18 </ b> B 50 is pressed in one direction D.

  Next, the effect of the diaphragm pump 1 of the said embodiment is demonstrated. The diaphragm pump 1 can reduce corrosion compared to the subframe 30 formed of a metal material because the subframe 30 is formed of resin. Further, as shown in FIG. 4, the first seal member 50 has a first frame 10 </ b> A and a second frame 10 </ b> B that are fastened by the upper bolts 14 </ b> A and 14 </ b> B and the lower bolts 18 </ b> A and 18 </ b> B. When pressed in the direction D, the first openings 31A and 31A are covered. That is, since the first seal member 50 is fixed to the subframe 30 without using screws or insert nuts, the fastening force is reduced by creep due to a phenomenon peculiar to resin, and fluid leaks from the subframe 30. There is no such thing. As a result, the corrosion of the subframe 30 due to the fluid can be reduced, and the airtightness in the subframe 30 can be maintained.

  According to the above embodiment, the main frame 10 is in contact with portions (upper contact portions 13A, 13B and lower contact portions 17A, 17B) that are fastened to each other by the upper bolts 14A, 14B and the lower bolts 18A, 18B ( Since the contact surfaces of the upper contact portions 13A, 13B and the contact surfaces of the lower contact portions 17A, 17B) are formed of a metal material, loosening of the upper bolts 14A, 14B and the lower bolts 18A, 18B can be reduced. .

  According to the embodiment, since the first seal member 50 has elasticity, the adhesion between the first seal member 50 and the subframe 30 is enhanced, and the airtightness in the subframe 30 is further enhanced. it can.

  Further, according to the embodiment, the boss 42 of the holding member 40 is in contact with the main frame 10. For this reason, the holding member 40 is firmly fixed because it is pressed by the main frame 10 to the inside of the subframe 30 via the boss 42. Further, the first seal member 50 is sandwiched between the main frame 10 and the rib 43. For this reason, it can suppress that a fluid leaks out from the inside of the sub-frame 30 to the main frame 10, and the suppression effect with respect to a liquid is especially high.

  According to the embodiment, the holding member 40 includes the second seal member 60 that is sandwiched between the subframe 30 and the main frame 10 and made of a frame-like elastic material that is larger than the outer shape of the first seal member 50. Therefore, it is possible to effectively prevent the fluid from leaking from the inside of the subframe 30 to the outside, and in particular, the effect of suppressing gas is high.

  Although one embodiment has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.

  In the above embodiment, as shown in FIG. 3, an example of the configuration of the main frame 10 that holds the first seal member 50 together with the subframe 30 and presses the first seal member 50 in one direction D against the subframe 30. The upper contact portions 13A and 13B and the lower contact portions 17A and 17B provided at the tips of the upper beam portions 12A and 12B and the lower beam portions 16A and 16B extending from the sandwiching portions 11A and 11B are in contact with each other, and the upper contact Although the parts 13A, 13B and the lower contact parts 17A, 17B have been described by way of examples fastened by the upper bolts 14A, 14B and the lower bolts 18A, 18B, the present invention is not limited to this configuration.

  For example, as illustrated in FIG. 7, the main frame (a pair of sandwiching portions) 110 includes a pair of sandwiching portions 111A and 111B. The pair of sandwiching portions 111A and 111B are arranged via a spacer 113 made of a metal material such as aluminum (including die-cast), stainless steel, iron, or brass. Insertion holes 115 for inserting bolts 114 are formed in the pair of sandwiching portions 111A and 111B, respectively. The spacer 113 is formed with an insertion hole 113 </ b> A for inserting a bolt (fastening portion) 114. In the pair of sandwiching portions 111A and 111B, the bolt 114 inserted from the outside of one of the pair of sandwiching portions 111A and 111B (the sandwiching portion 111A) is inserted into the insertion hole 113A of the spacer 113, and the pair of sandwiching portions 111A and 111B. The other (pinching part 111B) may be inserted from the inside and fastened by the nut 118 on the outside.

  In addition, although the said spacer 113 gave and demonstrated the example currently formed in prismatic shape, you may form in plate shape. Alternatively, a spacer in which the insertion hole 113A is not formed and both ends in the extending direction are tapped may be used. In this case, the holding portions 111A and 111B can be fastened to each other via the spacer by screwing the male screw into the screw groove of the spacer from the pair of holding portions 111A and 111B side.

  The main frame 110 has a screw hole formed in one of the holding portions 111A and 111B, and a bolt 114 inserted from the outside of the other holding portion 111B and 111A is screwed into the screw hole. The first seal member 50 may be pressed against the subframe 30 in one direction D. As described above, the main frame 110 may be configured to hold the first seal member 50 together with the subframe 30 and press the first seal member 50 in one direction D against the subframe 30.

  In the above-described embodiment or modification, the first seal member 50 has been described by taking an example in which the first seal member 50 is formed of an elastic resin member. However, the first seal member 50 is formed of a resin member that does not have elasticity. Also good. In this case, the first seal member 50 may be formed of a resin material such as PPS (polyphenylene sulfide resin), PBT (polybutylene terephthalate resin), or PP (polypropylene). Even in this case, there is an effect that corrosion due to a fluid such as water or water vapor can be prevented. Further, an elastic member such as rubber may be disposed between the first seal member 50 and the sandwiching portions 11A and 11B of the main frame 10.

  In the above-described embodiment or modification, the main frame 10 is in contact with portions (upper contact portions 13A, 13B and lower contact portions 17A, 17B) fastened to each other by the upper bolts 14A, 14B and the lower bolts 18A, 18B. Although an example in which the contact surfaces of the upper contact portions 13A and 13B and the contact surfaces of the lower contact portions 17A and 17B are formed of a metal material (metal touch) has been described, the present invention is limited to this configuration. Not.

  In the above embodiment or modification, the subframe 30 in which the two first openings 31A and 31A into which the both ends 4C and 4C of the vibrator 4 can enter during reciprocation is described as an example. The frame 30 only needs to have at least one opening.

  In the said embodiment or modification, although the structure provided with the 2nd seal member 60 was mentioned as an example, the structure which is not provided with the 2nd seal member 60 may be sufficient. Even in this case, corrosion of the casing due to the fluid can be reduced and airtightness in the casing can be maintained. However, the airtightness in the housing can be more effectively maintained by providing the second seal member 60.

  Various embodiments and modifications described above may be combined in various ways without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Electromagnetic vibration type diaphragm pump, 3 ... Electromagnet, 4 ... Vibrator, 5 ... Diaphragm, 10, 110 ... Main frame (clamping part), 10A ... First frame, 10B ... Second frame, 11A, 11B, 111A, 111B ... clamping part, 12A, 12B ... upper beam part, 13A, 13B ... upper contact part, 14A, 14B ... upper bolt, 16A, 16B ... lower beam part, 17A, 17B ... lower contact part, 18A, 18B ... lower bolt , 30 ... subframe (housing), 31 ... main body, 31A, 31A ... first opening (opening), 35 ... positioning part, 40 ... holding member, 42 ... boss, 43 ... rib, 50 ... first Seal member, 60 ... second seal member, 111A, 111B ... clamping portion, 114 ... bolt (fastening portion), 118 ... nut (fastening portion).

Claims (6)

A vibrator to which a magnet is fixed; an electromagnet provided to face the magnet of the vibrator and reciprocatingly move the vibrator in one direction; and a diaphragm provided at at least one end in the one direction of the vibrator; An electromagnetic vibration type diaphragm pump comprising: the vibrator, the electromagnet, and a housing that houses the diaphragm,
A housing that accommodates the vibrator, the diaphragm, and the electromagnet, has at least one opening into which one end of the vibrator can enter during the reciprocating motion, and is formed of a resin;
A lid that covers the opening and is formed of resin;
A pair of clamping parts for clamping the lid together with the housing;
A fastening portion for fastening the clamping portions together,
A pair of clamping parts fastened by the fastening part are electromagnetic vibration type diaphragm pumps that press the lid in the one direction against the casing.   2. The electromagnetic vibration type diaphragm pump according to claim 1, wherein the clamping portion is formed of a metal material in a portion that is fastened to the fastening portion and a portion that is in contact with the fastening portion.   The electromagnetic vibration type diaphragm pump according to claim 1, wherein the lid body has elasticity. A holding member for holding the diaphragm;
The housing has a positioning portion that can fit the holding member inside the opening in the one direction,
The electromagnetic vibration type diaphragm pump according to any one of claims 1 to 3, wherein the lid body covers the opening in a state in which the lid is in contact with the holding member fitted in the positioning portion. The holding member has a rib protruding in the one direction, and a boss protruding in the one direction from the rib,
The lid body has an insertion part through which the boss can be inserted,
5. The electromagnetic vibration type diaphragm pump according to claim 4, wherein the boss is in contact with the holding portion while being inserted through the insertion portion, and the rib is held between the holding portion and the lid body. .   The electromagnetic according to any one of claims 1 to 5, further comprising a sealing member sandwiched between the casing and the clamping portion and made of a frame-like elastic material larger than the outer shape of the lid. Vibration diaphragm pump.

Images