JP2010275887A - Diaphragm pump for fluid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diaphragm pump for fluid which reduces the number of components and facilitates assembly. <P>SOLUTION: The diaphragm pump for fluid is equipped with a diaphragm assembly member in which a plurality of saucer-shaped diaphragms 50 forming a pump chamber 40 is formed as one unit. All suction valve elements 21 and discharge valve elements 29 are integrally formed as a valve element assembly member 2. Pairs of suction valve elements 21 and discharge valve elements 29 respectively are made to correspond to pump chambers 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a diaphragm pump for fluid.

  As a conventional diaphragm pump, as the inventor has already proposed, a diaphragm assembly member in which a plurality of diaphragms forming a pump chamber are integrally formed, a plurality of umbrella-shaped valve body members, and an umbrella-shaped valve body member are installed. A device including an inner lid member to be worn and a lid member in which a flow path is formed is known (see Patent Document 1).

JP 2009-41538 A

  However, when the umbrella-shaped valve body member is used, there are a problem that the number of parts is increased, an assembling work is troublesome, and there is a high possibility that the work is lost or damaged during the work. That is, there is a problem that the manufacturing cost becomes high. Further, since the space for attaching the umbrella-shaped valve body member is required for the inner lid member, there is a problem that the inner lid member becomes large and it is difficult to downsize the entire diaphragm pump.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a diaphragm pump for fluid that is small in size and easy to assemble with a small number of parts.

  In order to achieve the above object, a fluid diaphragm pump according to the present invention includes a diaphragm assembly member in which a plurality of vertical diaphragms forming a pump chamber are integrally formed, and further includes all suction valve bodies and discharge valves. The body part is integrally formed as a disk-like valve body assembly member, and a pair of the suction valve body part and the discharge valve body part are associated with each of the pump chambers.

Moreover, the said valve body assembly member integrally forms the packing part which divides | segments the air | atmosphere side, a high voltage | pressure side, and a low voltage | pressure side in a sealing form.
The valve body assembly member includes the suction valve body portion having an arcuate protruding wall shape and the discharge valve body portion having a flat tongue shape, and further, the diaphragm assembly member and the valve body assembly. An arcuate suction through hole interposed between the members and into which the suction valve body portion is inserted, a discharge through hole covered by the discharge valve body portion, and an inner periphery of the suction through hole An inner lid member having a suction valve seat portion comprising a side arc surface and a discharge valve seat portion comprising a lid-side flat surface in the vicinity of the discharge through-hole is provided.

  According to the diaphragm pump for fluid of the present invention, the umbrella-shaped valve body member can be omitted, the number of parts can be reduced, and the assembly can be facilitated. The manufacturing man-hours and assembly man-hours for members can be reduced, and the manufacturing cost can be greatly reduced. The length of the entire pump in the longitudinal direction can be shortened and the size can be reduced.

It is a disassembled perspective view which shows embodiment of this invention. It is a principal part disassembled perspective view which shows embodiment of this invention. It is a perspective view which shows an example of a diaphragm assembly member. It is the perspective view which looked at an example of the valve body assembly member from one side. It is a perspective view from the other side of an example of a valve assembly member. It is a top view which shows an example of an inner cover member. It is a front view which shows an example of an inner cover member. It is principal part sectional drawing which shows embodiment of this invention.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
The fluid diaphragm pump of the present invention corresponds to each of the pump chambers 40 and the diaphragm assembly member 5 integrally formed with the three vertical diaphragms 50 forming the pump chamber 40 in FIGS. Corresponding to a disc-like valve body assembly member 2 having a suction valve body portion 21 and a discharge valve body portion 29, a suction valve seat portion 31 corresponding to the suction valve body portion 21 and a discharge valve body portion 29 An inner lid member 3 having a discharge valve seat 39, a lid member 1 having a suction passage 11 and a discharge passage 19 communicating with a counterpart member such as a fluid or a tube, and the opposite side in the arrow N direction are in contact with each other. And a support (retainer member) 6 that holds the diaphragm assembly member 5.
In the present invention, the central axis of the whole fluid diaphragm pump is referred to as an axis L. Moreover, the arrow N direction side on the axis L is called one side. The axis L is coincident with the axis of the output shaft 74a of the actuator 74. The arrow N direction side coincides with the protruding direction of the output shaft 74a. Further, FIG. 8 shows a cut surface of a cut surface that is bent at 120 degrees as viewed from the direction of the axis L for easy explanation.

  The lid member 1 is a short cylindrical resin molded product, and has a chimney-like suction passage 11 for sucking fluid on the one side surface (surface) so as to project at the center and discharge the sucked fluid. A chimney-like discharge passage 19 is provided. On the other side surface (back surface), a circular concave suction chamber 12 communicating with the suction passage 11 and a discharge chamber 18 communicating with the discharge passage 19 and annularly recessed so as to surround the suction chamber 12 are formed. ing.

  The diaphragm assembly member 5 is made of an elastic member. In FIGS. 1 to 3 and 8, the diaphragms 50 are arranged at equal intervals of 120 degrees in the circumferential direction around the axis L, and the openings of the diaphragm 50 are arranged. The vicinity is integrally formed by being connected to the axis L by an orthogonal plane diaphragm 52. Each diaphragm 50 has a circular seal portion 51 projecting (bulging) from the diaphragm 52 to one side at the opening edge portion. In addition, each diaphragm 50 has a diaphragm driving portion 53 protruding to the other side, which can compress and expand the diaphragm 50 by reciprocating (piston) motion. In FIG. 8, since the seal portion 51 is compressed by the inner lid member 3, it is shown with the same thickness as the flat membrane portion 20.

  The valve body assembly member 2 is made of an elastic member, and in FIGS. 4, 5, and 8, a flat membrane portion 20 that is orthogonal to the axis L, and a through-hole 22 that is concentric with the axis L, have. Three arcuate wall-shaped suction valve bodies 21 projecting from the flat membrane portion 20 to the other side, and three flat tongue-shaped discharge valves formed by cutting the flat membrane portion 20 into a U shape And a body part 29. That is, all of the intake valve body 21 and the discharge valve body 29 are integrally formed.

  The suction valve body 21 is arranged around the axis L along the through hole 22 at equal intervals of 120 degrees. The discharge valve body 29 is disposed around the axis L in a rotationally symmetrical manner at equal intervals of 120 degrees. That is, the pair of intake valve body portions 21 and the discharge valve body portion 29 are made to correspond to each pump chamber 40. Further, the three suction valve body portions 21 are made to correspond to the suction chamber 12, and the three discharge valve body portions 29 are made to correspond to the discharge chamber 18.

  Further, the valve body assembly member 2 is integrally formed by projecting (swelling) a packing portion 25 from the flat membrane portion 20. The packing portion 25 includes, on one side, a circular one-side inner packing portion 25a that surrounds the vicinity of the through-hole 22, and a one-side outer packing portion 25b formed along the outer peripheral edge of the flat membrane portion 20 on one side. And have. On the other side, a circular other side inner packing portion 25c surrounding the vicinity of the three suction valve body portions 21, and the other side outer packing portion 25d formed along the outer peripheral edge portion of the flat membrane portion 20, Have. In other words, it can be said that the valve body assembly member 2 is formed by integrally molding the packing member, the suction valve body portion 21 and the discharge valve body portion 29 to be provided between the lid member 1 and the inner lid member 3. In FIG. 8, the packing portion 25 is shown in the same thickness as the flat membrane portion 20 because it is sandwiched between the lid member 1 and the inner lid member 3 and compressed.

6 to 8, the inner lid member 3 is a resin molded product and is interposed between the diaphragm assembly member 5 and the valve body assembly member 2, and the discharge valve body portion 29 is applied from one side. It has a discharge through-hole 38 for covering and an arc-shaped suction through-hole 32 into which the suction valve body 21 is inserted from one side.
A suction valve seat 31 is formed in the vicinity of the discharge through-hole 38 and the flat surface on the lid side (the range indicated by the one-dot chain line in FIGS. Further, the suction valve seat portion 31 is an inner circumferential arc surface 32a of the suction through hole 32 with which the inserted suction valve body portion 21 comes into close contact and separable contact. The outer peripheral arc surface 32b of the suction through-hole 32 is formed in a diameter-expanding taper shape toward the other side.

  The inner lid member 3 has a circular concave suction recess 34 and a positioning annular projecting wall 35 inserted into the suction through hole 22 at the center. The projecting wall portion 35 has an outer diameter dimension that is the same as that of the inner circumferential arc surface 32a of the suction through-hole 32. The inner lid member 3 is recessed radially inward from the inner circumferential arc surface 32a and the outer circumferential surface 35a of the protruding wall portion 35, and from one surface (front surface) to the other surface (back surface). The suction recess 33 is cut out to a position closer to the other side beyond the intermediate position.

  1 and 8, a radial rocking plate 70 having a locking hole 70a for holding the diaphragm driving unit 53, an actuator 74 of a cylindrical small DC electric motor, and an output of the actuator 74 An eccentric rotating member having a bottomed cylindrical cup-shaped case member 73 attached to the shaft 74a side and an eccentric hole 72b in which the output shaft 74a is inserted into the central portion and disposed at an eccentric position from the output shaft 74a 72, and a shaft member 71, one of which is inserted into the central portion of the swing plate 70 and the other is inserted into the eccentric hole 72b in an inclined manner.

  In the assembled state, the lid member 1, the valve body assembly member 2, the inner lid member 3, the diaphragm assembly member 5, and the support (retainer member) 6 are sequentially laminated on the case member 73 and the long screw member 75. Are inserted in a skewered manner and screwed to the case member 73 to form the casing 10. Within the case member 73, the swinging plate 70 is swung by the rotation of the output shaft 74a, and the diaphragm driving unit 53 is reciprocated to compress and expand the pump chamber 40 formed by the diaphragm 50.

The operation of the above-described embodiment of the fluid diaphragm pump of the present invention will be described.
In the assembling process, the suction valve body 21 of the valve body assembly member 2 is inserted into the suction through-hole 32 of the inner lid member 3 and overlapped so that the suction valve body 21 and the suction valve seat part are overlapped. An intake valve made up of 31 and a discharge valve made up of a discharge valve body portion 29 and a discharge valve seat portion 39 are formed. The process of superimposing the valve body assembly member 2 on the inner lid member 3 is performed simultaneously with a valve portion forming process for assembling a conventional umbrella-shaped valve member and a conventional packing member disposing process (in one process). Summarized).

  Further, since the inner lid member 3 does not need to form an attachment portion or a space for the umbrella-shaped valve body member, it is sufficiently wide and has a simple flow without a wall portion such as a maze (low loss of flow velocity). A road is obtained. Further, the inner lid member 3 can be formed in a thin disc shape or a short cylindrical shape in the direction of the axis L, and the other side surface (back surface) of the inner lid member 3 from one side surface (front surface) of the lid member 1. The length dimension T can be shortened, and a compact pump as a whole can be obtained.

  Then, the lid member 1, the valve body assembly member 2, the inner lid member 3, the diaphragm assembly member 5, and the support 6 are sequentially stacked, and the long screw member 75 is inserted in a skewered manner and screwed to the case member 73. Thus, the casing 10 is formed. Three pump chambers 40 surrounded by the diaphragm 50 and the inner lid member 3 are formed in the casing 10. In addition, a suction flow path including a suction passage 11, a suction chamber 12, a suction recess 34, a suction recess 33, and a suction through hole 32 is formed on the lid member 1 and the inner lid member 3 side, and a discharge is made. A discharge flow path including the through hole 38, the discharge chamber 18, and the discharge path 19 is formed. A suction valve is interposed in the suction flow path. A discharge valve is interposed in the discharge channel.

  By forming the suction channel and the discharge channel on the lid member 1 and the inner lid member 3 side, the liquid can be pumped. If the flow path is formed on the inner side of the case member 73 in which the swing plate 70 or the like is accommodated, the member in the case member 73 is immersed in the liquid and breaks down, so that liquid cannot be pumped.

When the actuator 74 is driven after assembly, the swing plate 70 swings. As the swing plate 70 swings, the diaphragm drive unit 53 reciprocates. When the pump chamber 40 expands, the inside of the pump chamber 40 becomes negative pressure, and the suction valve body portion 21 is separated from the suction valve seat portion 31 in a diameter-expanded manner toward the outer peripheral arc surface 32b ( The suction recess 33 and the pump chamber 40 are opened. The fluid passes through the suction path 11, the suction chamber 12, the suction recess 34, the suction recess 33, and the suction through-hole 32 sequentially by negative pressure, and reliably flows into the pump chamber 40.
Further, the discharge valve body portion 29 is sucked and brought into pressure contact (contact) with the discharge valve seat portion 39 by a negative pressure. The backflow of the fluid from the discharge path 19 and the discharge chamber 18 to the pump chamber 40 is prevented.

Next, when the pump chamber 40 is compressed by the reciprocating motion of the diaphragm driving portion 53, the fluid in the pump chamber 40 is filled between the suction valve body portion 21 and the outer circumferential arc surface 32b, and is used for suction. The valve body portion 21 is securely brought into pressure contact with the valve seat portion 31 for suction. The suction recess 33 and the pump chamber 40 are shut off by the suction valve body 21 to stop the flow of fluid.
Further, the discharge valve body portion 29 is pressed from the pump chamber 40 side and swings so as to be separated (separated) from the discharge valve seat portion 39, so that the discharge through hole 38 and the discharge chamber 18 are opened. The fluid in the pump chamber 40 is pumped through the discharge through-hole 38 and the discharge chamber 18 and reliably discharged from the discharge passage 19.

  The one-side inner packing portion 25a of the valve body assembly member 2 prevents communication between the low-pressure side suction chamber 12 and the high-pressure side discharge chamber 18. The one-side outer packing portion 25b prevents communication between the high-pressure side discharge chamber 18 and the outside of the atmosphere-side casing 10. Further, the other side inner packing portion 25c prevents unnecessary pressure from the discharge passage from being applied to the suction valve body portion 21. The other side outer packing portion 25d includes the discharge through hole 38 and the pump chamber 40. Prevent communication with the outside. Furthermore, the seal portion 51 of the diaphragm assembly member 5 prevents the pump chamber 40 from communicating with the outside. The packing part 25 and the seal part 51 partition the atmosphere side, the high pressure side, and the low pressure side in a sealed manner.

  The present invention can be modified in design, and the diaphragm assembly member 5 may be formed by arranging four diaphragms 50 at equal intervals of 90 degrees in the circumferential direction. In this case, of course, four intake valve body portions 21 and discharge valve body portions 29 of the valve body assembly member 2 are provided, and four intake valve seat portions 31 and discharge valve seat portions 39 of the inner lid member 3 are provided. Provide one. Further, the arc-shaped protruding wall-shaped valve body portion of the valve body assembly member 2 is used for discharge, and the flat tongue-shaped valve body portion is used for suction, and the inner lid member 3 and the lid member 1 correspond to the valve body portion. A valve seat portion may be provided, and the roles of the suction channel and the discharge channel described above may be interchanged.

  As described above, the present invention includes the diaphragm assembly member 5 in which a plurality of saddle-shaped diaphragms 50 forming the pump chamber 40 are integrally formed, and further includes all the intake valve body parts 21 and the discharge valve body parts 29. Is integrally formed as a disc-like valve body assembly member 2 and the pair of suction valve body portions 21 and discharge valve body portions 29 are made to correspond to the respective pump chambers 40, so that the umbrella-like valve body member is omitted. Thus, the number of parts can be reduced and the assembly can be facilitated. The number of manufacturing steps and assembly steps for parts can be reduced, and manufacturing costs can be greatly reduced. The length of the whole longitudinal direction can be shortened and the small diaphragm pump for fluids can be obtained.

  Since the valve assembly member 2 is integrally formed with a packing portion 25 that seals the atmosphere side, the high pressure side, and the low pressure side in a sealed manner, the flow is stabilized without leaking a fluid, and a predetermined flow rate is efficiently ensured. Can be sent. In addition, the number of assembly steps can be reduced.

  The valve body assembly member 2 includes a suction valve body portion 21 having an arcuate protruding wall shape and a discharge valve body portion 29 having a flat tongue shape, and further includes a diaphragm assembly member 5 and a valve body assembly member 2. An arcuate through-hole 32 for insertion into which the intake valve body 21 is inserted, a discharge through-hole 38 covered by the discharge valve body 29, and an intake through-hole 32 Since the inner lid member 3 having the suction valve seat portion 31 formed by the circumferential arc surface 32a and the discharge valve seat portion 39 formed by the lid-side flat surface in the vicinity of the discharge through hole 38 is provided, it is sufficiently wide. A flow path with a small loss of flow velocity is obtained. Moreover, it can be set as a thin disk shape. The valve part can be easily formed by combining the valve body part and the valve seat part, and the assembly time can be shortened.

2 Valve assembly member 3 Inner lid member 5 Diaphragm assembly member
21 Valve body for suction
25 Packing part
29 Valve body for discharge
31 Valve seat for suction
32 Suction hole
32a Inner circumferential arc surface
38 Discharge through hole
39 Valve seat for discharge
40 Pump room
50 Diaphragm

Claims (3)

A diaphragm assembly member (5) integrally formed with a plurality of vertical diaphragms (50) forming a pump chamber (40),
Further, all the suction valve body parts (21) and the discharge valve body parts (29) are integrally formed as a disk-like valve body assembly member (2), and the pair of suction valve body parts (21 And a discharge valve body (29) corresponding to each of the pump chambers (40).   The diaphragm pump for fluid according to claim 1, wherein the valve body assembly member (2) is integrally formed with a packing portion (25) for sealing the atmosphere side, the high pressure side, and the low pressure side in a sealed manner. The valve body assembly member (2) includes the suction valve body portion (21) having an arcuate protruding wall shape and the discharge valve body portion (29) having a flat tongue shape,
Further, an arcuate suction through-hole (32) interposed between the diaphragm assembly member (5) and the valve body assembly member (2) and into which the suction valve body portion (21) is inserted, and A discharge through hole (38) covered by the discharge valve body (29), and a suction valve seat (31) comprising an inner circumferential arc surface (32a) of the suction through hole (32); The fluid diaphragm pump according to claim 1 or 2, further comprising an inner lid member (3) having a discharge valve seat portion (39) comprising a lid-side flat surface in the vicinity of the discharge through hole (38).

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