JP2006169988A - Diaphragm pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diaphragm pump for lengthening the service life. <P>SOLUTION: In this diaphragm pump 10, a moving piece 30 and a diaphragm 40 are arranged inside a case 20, and an electromagnet part 50 is arranged outside the case 20. Thus, a moving piece storage part 21 of the case 20 becomes a partition wall, and cuts off heat energy generated by the electromagnet part 50, and can prevent the diaphragm 40 from deteriorating by being heated. Thus, the service life of the diaphragm 40 can be lengthened. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a diaphragm pump that sucks and discharges fluid by displacement of a diaphragm.

  2. Description of the Related Art Conventionally, a diaphragm pump is known as a booster that boosts a combustible gas or the like, an indoor air mat, an air bed air intake / exhaust device, or an oxygen supply device. As such a diaphragm pump, there is an electromagnetic vibration type diaphragm pump that vibrates a vibrator by an electromagnet to displace the diaphragm and sucks and discharges a fluid (for example, see Patent Document 1).

  The one described in Patent Document 1 includes an electromagnet part, a vibrator in which a magnet inserted at a predetermined interval is fixed in the gap of the electromagnet part, a diaphragm coupled to both ends of the vibrator, and an electromagnet part. A pump casing portion fixed to each of the both end portions. The electromagnet part includes a frame and an electromagnet arranged corresponding to the frame and made up of an iron core and a coiled coil part. And the peripheral part of a diaphragm is closely_contact | adhered and fixed to this flame | frame, and the sealed space where a vibrator | oscillator vibrates with an electromagnet part and a diaphragm is formed. Further, the frame is provided with a window for sucking fluid and a window for discharging gas through a valve at a portion facing the diaphragm.

JP 2003-239867 A (refer to pages 3 to 4, FIGS. 1 to 9 and FIGS. 11 to 13)

  By the way, in the conventional structure like patent document 1, an electromagnet, a vibrator | oscillator, and a diaphragm are arrange | positioned inside a flame | frame, and a sealed space is formed. For this reason, the heat which generate | occur | produced by sending an electric current through the winding coil part of an electromagnet is transmitted to a diaphragm via a vibrator, or is directly transmitted to a diaphragm, and a diaphragm is heated. In general, a diaphragm of a diaphragm pump used as a booster for combustible gas such as city gas is excellent in gas resistance (swelling and elution). For example, NBR (Nitril-Butadien-Rubber), fluororubber, etc. are used. As an example, the above-described configuration in which it is difficult to dissipate heat has a problem that the diaphragm is exposed to a high temperature and cannot be extended in life due to thermal degradation.

  The present invention is to provide a diaphragm pump capable of extending the life.

  The diaphragm pump according to the present invention includes an electromagnet part including at least one pair of opposedly arranged electromagnets, and a movable element provided between the electromagnets arranged to face each other and provided with magnets on the side surfaces facing the electromagnets. And a flat diaphragm provided at the end of the movable element, and a substantially cylindrical shape, and the peripheral edge of the diaphragm is sealed to the inner peripheral surface of the cylindrical end, and the movable element is A case that includes a pump chamber that is reciprocally held along an axial center inside a cylinder and that is partitioned by the diaphragm at the cylinder end and has a suction port for sucking fluid and a discharge port for discharging fluid; , Wherein the electromagnet portion is disposed outside the case.

  According to this invention, the electromagnet part and the mover are partitioned by the wall of the case. Thereby, the wall of this case serves as a partition to block heat generated in the electromagnet portion. Therefore, the heat generated in the electromagnet portion is not directly transmitted to the diaphragm, and the heat is not transmitted to the diaphragm via the mover, so that the thermal deterioration of the diaphragm can be prevented. Therefore, the lifetime of the diaphragm pump can be extended.

  In the diaphragm pump of the present invention, it is preferable that the case includes a mover storage chamber that is formed continuously with the pump chamber and stores the mover, and the mover storage chamber is sealed.

  In the diaphragm pump having such a configuration, since the movable member storage chamber of the case is sealed, even if the diaphragm is damaged and the fluid enters the movable member storage chamber, the fluid does not contact the electromagnet portion. . In particular, when the diaphragm pump is used as a booster for combustible gas such as city gas, in the conventional configuration, if the diaphragm is damaged, the combustible gas may come into contact with the electromagnet portion and explode. On the other hand, in the present invention, even if the diaphragm is broken and gas flows into the mover housing chamber, it can be prevented from flowing out to the outside, and the mover housing chamber has no electronic circuit that consumes power and overheats. There is no danger of explosion.

  Furthermore, in the diaphragm pump of the present invention, it is preferable that the mover storage chamber is sealed with an inert gas sealed therein.

In this configuration, an inert gas such as N ₂ (nitrogen) or Ar (argon) is sealed in the mover storage chamber. Thereby, since the generation | occurrence | production of the crack by the oxidative degradation of the surface of the rubber-made diaphragm by oxygen and ozone in air can be suppressed, a diaphragm can be made long-life.

  And in the diaphragm pump of this invention, it is preferable that the said electromagnet part is exposed and arrange | positioned in the state which can contact external air.

  In such a configuration, the heat generated in the electromagnet portion is released to the outside without entering the case or other members. Therefore, the case and other members are not excessively heated, and the heat of these cases and other members is not transmitted to the diaphragm, the mover, and the like. Therefore, the transmission of heat to the diaphragm can be suppressed, and thermal deterioration of the diaphragm can be prevented.

  In the diaphragm pump of the present invention, it is preferable that the electromagnet portion is disposed at a position that is separated from the outer peripheral surface of the case by a predetermined dimension and does not contact the case.

  In this configuration, since a gap having a predetermined size is formed between the electromagnet portion and the case, heat generated in the electromagnet portion is not directly transferred to the case. Therefore, it is possible to prevent the case from being heated.

  And in the diaphragm pump of this invention, it is preferable that the said diaphragm is provided in the both ends of the said needle | mover.

  In the diaphragm pump, the diaphragm is displaced toward the mover housing chamber due to the vibration of the mover, so that the fluid is sucked from the suction port, and the diaphragm is displaced toward the pump chamber so that the fluid is discharged from the discharge port. At this time, as described above, the diaphragms are provided at both ends of the mover, whereby the fluid can be efficiently sucked and discharged by the two diaphragms. Moreover, when one diaphragm is displaced toward the mover housing chamber and sucks the fluid, the other diaphragm is displaced toward the pump chamber and discharges the fluid. For this reason, fluid can be alternately sucked and discharged from the two pump chambers, and a fluid having a stable flow rate can always be sucked and discharged.

  In such a diaphragm pump, the pump chamber is provided at both ends of the mover storage chamber so as to face the diaphragm, and connects the suction ports and the discharge ports of the pump chambers. It is preferable to provide a connection port.

  By adopting such a configuration, the suction ports and the discharge ports are connected to each other by the connection port. Therefore, the pipes connected to the diaphragm pump need only be connected to these two connection ports. There is no need to connect piping to the outlet. Therefore, the structure is simplified and the piping work can be performed efficiently. Further, since the fluid is sucked from one pipe, the flow rate sucked can be made constant and the fluid can be discharged stably.

  Furthermore, in the diaphragm pump of the present invention, it is preferable that the case is provided detachably with respect to the connection port.

  In this configuration, since the case is detachably attached to the connection port, only the case can be easily removed during maintenance or the like. Therefore, maintainability and assemblability can be improved.

  And the diaphragm pump of this invention comprises the base body to which the said case and the said electromagnet part are attached, It is preferable that the said connection port is integrally provided in the said base body.

  In such a configuration, since the connection port is integrally formed with the base body, the connection port can be easily connected to the case in the process of assembling the diaphragm pump by fixing the case and the electromagnet to the base body.

  In the diaphragm pump of the present invention, it is preferable that the case is made of a non-conductor. An example of this non-conductor is a synthetic resin.

  When a conductive member is used for the case, an eddy current due to the vibration of the mover is generated in the case, and the movement of the mover may be braked to reduce the efficiency of the diaphragm pump. On the other hand, in the present invention, as described above, the case is formed of a non-conductor, so that no eddy current flows through the case. Therefore, it is possible to realize a mover storage chamber having a sealed structure that can prevent a decrease in efficiency of the diaphragm pump due to an eddy current.

  Hereinafter, a diaphragm pump according to an embodiment of the present invention will be described with reference to the drawings.

[Configuration of diaphragm pump]
FIG. 1 is an overall perspective view of a diaphragm pump according to an embodiment of the present invention. FIG. 2 is a cross-sectional plan view of the diaphragm. FIG. 3 is a side view of a section of the diaphragm pump.

  1 to 3, reference numeral 10 denotes a diaphragm pump. The diaphragm pump 10 includes, for example, a booster pump for combustible gas such as city gas, an intake / exhaust device for sucking and exhausting air such as an air mat and an air bed, and an oxygen pump. In addition to a supply device, it can be used as a pump for sucking and discharging other fluids. In addition, the diaphragm pump 10 of this Embodiment demonstrates as what is utilized for the pressure | voltage rise apparatus for pressure | voltage-rising combustible gas, such as city gas, as an example. The diaphragm pump 10 includes a case 20, a mover 30, a diaphragm 40, an electromagnet unit 50, a fluid intake / exhaust unit 60, and a pedestal unit 70 as a base body.

  The case 20 is formed in a plane H shape, and holds the mover 30 and the diaphragm 40 in this internal space. The case 20 includes a mover storage unit 21 and pump units 22 provided at both ends of the mover storage unit 21. The case 20 is formed of a nonconductive member such as a nonconductive plastic.

  The mover storage part 21 is formed in a substantially cylindrical shape. A mover 30 is disposed substantially coaxially with the axis of the mover storage unit 21. At both end portions of the mover storage portion 21, a substantially annular flange portion 211 that protrudes outward is formed. In addition, a pump fixing portion 212 is formed on the periphery of the flange portion 211 in a substantially annular shape that protrudes toward the pump portion 22 side. The mover accommodating portion 21 is formed by integrally including the flange portion 211 and the pump fixing portion 212. And the needle | mover accommodating part 21 is formed in the concave shape by the flange part 211 and the pump fixing | fixed part 212 projecting. Further, a substantially annular mover housing portion side groove 213 is formed on the pump fixing portion 212 side of the pump fixing portion 212, and the peripheral portion of the diaphragm 40 is engaged with the mover housing portion side groove 213. To be sealed. Thereby, the inside of the needle | mover storage part 21 forms the sealed needle | mover storage chamber 21A. Further, an inert gas such as nitrogen gas or argon gas is sealed in the mover storage chamber 21A.

  The pump part 22 is fixed to both ends of the mover storage part 21 so as to cover the cylindrical part of the mover storage part 21 from both ends. A diaphragm 40 is provided between the pump unit 22 and the mover storage unit 21, and a pump chamber 22 </ b> A is formed between the pump unit 22 and the diaphragm 40. The pump unit 22 includes a planar upper wall portion 221 whose planar shape is substantially the same as the flange portion 211 of the mover housing portion 21, and the mover housing portion 21 side from the peripheral portion of the upper wall portion 221. A substantially annular case fixing portion 222 that protrudes by a predetermined dimension is integrally formed.

  The upper wall portion 221 is formed with a suction port 223 for sucking fluid and a discharge port 224 for discharging fluid. A suction valve 223A is attached to the suction port 223, and a discharge valve 224A is attached to the discharge port 224. The suction valve 223A is moved toward the diaphragm 40 when the combustible gas is sucked between the pump chamber 22A, that is, the upper wall portion 221 of the pump portion 22 and the diaphragm 40, and opens the suction port. Further, when the combustible gas is discharged from the inside of the pump unit 22, the suction valve 223A is in close contact with the suction port 223 side and closes the suction port 223. The exhaust valve 224 </ b> A moves toward the fluid intake / exhaust unit 60 when the combustible gas is exhausted from the inside of the pump unit 22, and opens the exhaust port 224. And when combustible gas is inhaled, it closely_contact | adheres to the discharge port 224 and closes the discharge port 224. FIG. 1 to 3, an example in which one suction port 223 and one discharge port 224 are formed for each upper wall portion 221 of the pump portion 22 is shown. The number is not particularly limited. That is, a plurality of inlets 223 and outlets 224 may be provided. In this case, if the number of the inlets 223 and the outlets 224 are the same, the combustible gas can be stably absorbed and discharged.

  In the case fixing part 222, a pump part side concave groove part 225 is formed on the surface of the mover storage part 21 that faces the pump fixing part 212. The peripheral edge portion of the diaphragm 40 is engaged with the concave groove portion 225 on the pump portion side. Then, by fixing the case fixing portion 222 to the pump fixing portion 212 of the mover housing portion 21 in close contact, the diaphragm 40 is fixed by crimping the peripheral portion to the mover housing portion side groove portion 213 and the pump portion side groove portion 225. To be sealed. Here, the needle | mover accommodating part 21 and the pump part 22 are fixed by screwing with the fluid suction-and-discharge part 60 mentioned later with the screw 60A. In addition, the pump fixing part 212 of the mover storage part 21 and the case fixing part 222 of the pump part 22 may be fixed by, for example, welding or an adhesive. Alternatively, the movable member storage portion 21 and the pump portion 22 may be fixed and the diaphragm 40 may be pressure bonded after the movable member storage portion side concave groove portion 213 and the pump portion side concave groove portion 225 are filled with a sealant or the like. In such a configuration, it is possible to further improve the sealing degree of the mover storage chamber 21A.

  The mover 30 is formed in a substantially rod shape, and is disposed at a position separated from the inner peripheral surface of the mover storage unit 21 by a predetermined dimension without contacting the inner peripheral surface of the mover storage unit 21. Diaphragms 40 are fixed to both ends of the mover 30. In other words, the mover 30 connects two diaphragms 40 fixed to both ends of the mover storage unit 21. Thereby, the mover 30 can displace one diaphragm 40 to the pump part 22 side and simultaneously displace the other diaphragm 40 to the mover storage part 21 side.

  Further, two substantially annular magnet fitting groove portions 31 are formed on the side surface of the mover 30 at equal intervals. Magnets 32 are respectively fitted in the magnet fitting grooves 31. In addition, although the example in which the magnet fitting groove part 31 is formed in an annular shape is shown, the present invention is not limited thereto, and for example, the magnet fitting groove part 31 may be formed only on a surface facing an electromagnet part 50 described later. .

  As the diaphragm 40, for example, a synthetic rubber having corrosion resistance against city gas or the like, for example, fluororubber, NBR (Nitril-Butadien-Rubber) having excellent heat resistance, corrosion resistance and flexibility is used. In this embodiment, combustible gas such as city gas is used as the fluid. However, when other fluid is used, the material of the diaphragm 40 can be determined according to the type of the fluid. However, in any case, the diaphragm 40 needs to change the pressure of the pump chamber 22A due to the displacement and open the suction port 223 and the discharge port 224. Therefore, the synthesis of NBR, fluorine rubber, or the like excellent in flexibility is required. It is preferable to use rubber.

  The diaphragm 40 is formed in a substantially disk shape, and as described above, the substantially central portion is fixed to the end portion of the mover 30 and the peripheral portion is crimped and fixed to the mover housing portion 21 and the pump portion 22. When the diaphragm 40 is displaced to the pump chamber 22A side by the movement of the mover 30, the volume of the pump chamber 22A is compressed, the discharge valve 224A is moved, the discharge port 224 is opened, and the mover 30 is moved. When displaced to the mover storage chamber 21A side by the movement, the volume of the pump chamber 22A expands and the suction valve 223A is moved to open the suction port 223.

  At least one pair of electromagnet portions 50 is provided with the case 20 in between. These electromagnet portions 50 are provided apart from the case 20 by a predetermined dimension. The electromagnet unit 50 includes an electromagnet 53 having an iron core 51 and a coil 52 wound around the iron core 51. The electromagnet 53 is disposed at a position facing the magnet 32 provided on the mover 30. And it is preferable that the electromagnet part 50 is arrange | positioned so that the separation distance from the electromagnet 53 which pinches | interposes the case 20 to the magnet 32 which each opposes may become substantially the same. Thus, by making the distance between the electromagnet 53 and the magnet 32 substantially the same, the axis of the mover 30 is inclined with respect to the axis of the mover storage part 21, or the mover 30 is The movable element 30 can be stably vibrated without contacting the inner peripheral surface.

  The fluid suction / discharge part 60 is fixed to the upper wall part 221 of the pump part 22 of the case 20 by, for example, screwing. For this fixing, as shown in FIG. 3, the fluid intake / exhaust portion 60 and the pump portion 22 are screwed and fixed to the mover storage portion 21 with screws 60A. For fixing the fluid intake / exhaust portion 60, other fixing methods such as welding or an adhesive may be used. The fluid suction / discharge unit 60 includes a suction pipe 61 connected to the suction port 223 of the pump unit 22 and a discharge pipe 62 connected to the discharge port 224. Further, the O-ring 64 is sealed between the suction port 223 and the suction pipe 61 and between the discharge port 224 and the discharge pipe 62. And the pipe attachment part 63 protrudes in the front-end | tip part of these suction pipes 61 and the discharge pipes 62, and is formed. Further, the fluid intake / exhaust portion 60 is formed with a mounting piece 65 having a mounting hole protruding.

  As shown in FIGS. 1 to 3, the pedestal portion 70 is formed in a rectangular shape, and case attachment holes (not shown) are formed at the four corners of the rectangle. Then, the fluid suction / discharge portion 60 and the case 20 are fixed to the pedestal portion 70 by overlapping the mounting holes of the mounting pieces 65 of the fluid suction / discharge portion 60 on the case mounting holes and screwing the screws 70A.

  In addition, a pair of cylindrical hollow connection ports 71 are formed in the base portion 70. The connection port 71 is formed with a pipe fitting portion 71 </ b> A that opens to the outside at a position corresponding to the pipe mounting portion 63 of the fluid suction / discharge portion 60. Further, the pipe fitting portion 71A is formed in a shape in which the protruding shape of the pipe mounting portion 63 of the fluid suction / discharge portion 60 is fitted. The pipe fitting part 63 of the fluid intake / exhaust part 60 is detachably attached to the pipe fitting part 71A of the connection port 71 via an O-ring 71B. At this time, the connection port 71 is attached in a state of connecting the suction pipes 61 and the discharge pipes 62 of the fluid suction / discharge section 60 provided at both ends of the case 20. The case 20 is detachably attached to the connection port 71 via the fluid intake / exhaust portion 60 by detachably attaching the tube attachment portion 63 to the tube fitting portion 71A in this manner. 20 and the fluid intake / exhaust part 60 can be easily separated. A cylindrical external pipe attachment portion 71 </ b> C that communicates with the connection port 71 is formed substantially at the center of the connection port 71. The external pipe attachment portion 71C is formed to protrude to the outside of the pedestal portion 70, and is connected to a pipe such as a gas pipe for supplying city gas, for example.

  Also. A substantially rod-shaped electromagnet mounting portion 72 is erected on the pedestal portion 70. The electromagnet mounting portion 72 is disposed at a position sandwiching the side surface direction of the case 20 when the fluid suction / discharge portion 60 and the case 20 are mounted on the pedestal portion 70. At this time, the electromagnet unit 50 is disposed in a state where the electromagnet unit 50 is sandwiched between the concave portions of the mover storage portion 21 of the case 20, that is, the flange portions 211 provided at both ends of the mover storage portion 21. The electromagnet portion 50 is fixed to the electromagnet mounting portion 72 with screws 70B. At this time, as described above, the electromagnet unit 50 is fixed so that the electromagnet 53 is disposed at a position facing the magnet 32 of the mover 30 and spaced apart from the magnet 32 by a predetermined dimension. Further, the pedestal unit 70 is provided with a control unit (not shown) that controls the power supplied to the electromagnet 53. Then, a lead wire is connected from the control unit to the electromagnet 53 of the electromagnet unit 50 via the electromagnet mounting unit 72, and power is supplied to the electromagnet 53. Here, the configuration in which the control unit is provided in the pedestal unit 70 is shown, but the control unit may be provided outside the diaphragm pump 10. That is, the electromagnet unit 50 may be connected to a separately provided control device, and the power supplied by the control device may be controlled.

[Operation of diaphragm pump]
In such a diaphragm pump, electric power is supplied to the electromagnet unit 50 and an alternating current is supplied to the coil unit to change the magnetic pole on the case 20 side of the electromagnet 53, thereby vibrating the mover 30, that is, moving the mover. It is reciprocated along the axis of the chamber 21A. When the movable element 30 vibrates, the diaphragm 40 is alternately displaced toward the movable element storage unit 21 and the pump unit 22. When the diaphragm 40 is displaced to the mover housing chamber 21A side, the suction port 223 is opened and combustible gas is sucked into the pump chamber 22A. When the diaphragm 40 is displaced to the pump chamber 22A side, the discharge port 224 is opened and the pump chamber 22A is opened. The combustible gas is extruded and discharged.

  At this time, since electric power is supplied to the electromagnet 53 and current flows through the coil 52, heat energy is generated in the electromagnet portion 50, but the heat energy is blocked by the case 20, and the heat energy is directly applied to the diaphragm 40 and the mover 30. Not transmitted.

[Effects of diaphragm pump]
As described above, in the diaphragm pump 10 of the above-described embodiment, the mover 30 and the diaphragm 40 are disposed inside the case 20, and the electromagnet unit 50 is disposed outside the case 20. For this reason, the needle | mover accommodating part 21 of case 20 becomes a partition, and interrupts | blocks the thermal energy which generate | occur | produces in the electromagnet part 50. FIG. Therefore, thermal energy is not directly transmitted to the diaphragm 40 or the mover 30, and deterioration of the diaphragm 40 due to heat can be prevented. Therefore, the lifetime of the diaphragm 40 can be extended.

  Moreover, since the electromagnet part 50 is arrange | positioned outside the case 20, the generated thermal energy is directly radiated outside. Therefore, since the heat does not burn, the entire diaphragm pump 10 or the case 20 is heated, and this heat does not affect the diaphragm 40 and deteriorate it. Further, the combustible gas flowing through the pump chamber 22 </ b> A can be prevented from being heated by the heat of the electromagnet unit 50.

  Furthermore, the mover storage chamber 21A is sealed. For this reason, for example, even if the diaphragm 40 is damaged due to aging of the diaphragm 40 and the combustible gas enters the movable element storage chamber 21A, the electromagnet part 50 is disposed outside the case 20, There is no contact with the electromagnet portion 50. Therefore, danger such as explosion can be avoided and gas outflow to the outside can be prevented.

  The mover storage chamber 21A is filled with an inert gas such as nitrogen gas or argon gas. For this reason, it is possible to suppress the occurrence of cracks due to oxidative deterioration of the surface of the rubber diaphragm due to oxygen or ozone in the air, and the life of the diaphragm can be extended.

  Moreover, the diaphragm 40 is attached to the both ends of the needle | mover 30, and the needle | mover 30 vibrates in the state which connected these diaphragms 40. FIG. For this reason, due to the vibration of the mover 30, one diaphragm 40 is displaced toward the pump chamber 22A and the combustible gas is discharged from the discharge port 224. At the same time, the other diaphragm 40 is displaced toward the mover storage chamber 21A. Thus, the combustible gas can be sucked into the pump unit 22. By repeating this operation, the combustible gas having a stable flow rate can be absorbed and discharged at all times.

  Furthermore, the suction pipes 61 and the discharge pipes 62 of the fluid suction / discharge part 60 attached to both ends of the case 20 are connected by the connection port 71, and the city gas pipe is connected to the external pipe attachment part 71 </ b> C formed in the connection port 71. Etc. are connected. For this reason, combustible gas can be efficiently sucked and discharged through the two pump portions 22 by connecting one pipe each on the suction side and the discharge side. Therefore, the efficiency of the piping work can be improved. In addition, since the combustible gas is sucked from one pipe and the combustible gas is discharged from one pipe, the flow rate of the suction and discharge can be made constant.

  Further, the case 20 is detachably attached to the connection port 71 via a fluid suction / discharge part 60. For this reason, the case 20, the fluid intake / exhaust part 60, and the base part 70 can be easily separated, and the maintainability and the assemblability can be improved. That is, in general, a diaphragm pump using a rubber diaphragm does not function as a pump if the diaphragm is damaged. Therefore, maintenance is required to extend the life of the diaphragm. When using such a diaphragm pump in a device with a high density mounted, or when installing it in a location where piping, electrical wiring, etc. are installed at a high density, remove the diaphragm pump from the device for diaphragm maintenance. Is accompanied by difficult work. It is particularly difficult to remove the piping. On the other hand, in the diaphragm pump 10 of the present embodiment, as described above, the case 20 in which the diaphragm 40 is accommodated is detachably provided on the pedestal portion 70 to which the pipe is connected. Maintenance can be performed by easily removing only the case 20 and the fluid intake / exhaust part 60 without any work.

  The case 20 is formed of a nonconductive member such as a nonconductive plastic. For this reason, eddy current does not flow through the case 20. Accordingly, it is possible to realize the mover storage chamber 21 having a sealed structure in which the efficiency of the diaphragm pump 10 is not reduced by eddy current.

  Further, the electromagnet portion 50 is disposed at a position separated from the case 20 by a predetermined dimension. For this reason, the heat generated in the electromagnet unit 50 is not directly transmitted to the case 20. Therefore, heat is not transmitted to the diaphragm 40 due to the case 20 being heated, and the case 20 is not deformed by heat.

  Further, the two pairs of electromagnets 53 arranged in the diaphragm pump 10 are arranged in a state where the distances from the electromagnet 53 to the magnet 32 facing the electromagnet 53 are substantially the same. For this reason, the mover 30 can be stably vibrated without the mover 30 being inclined or contacting the inner peripheral surface of the case 20.

  Moreover, the electromagnet part 50 is being fixed to the base part 70 by screwing. For this reason, since the electromagnet part 50 becomes detachable with respect to the base part 70, it can be removed and replaced | exchanged easily. In particular, as described above, when the diaphragm pump 10 is incorporated and used in equipment mounted with high density, or when piping, electrical wiring, etc. are already installed with high density, without removing the pedestal portion 70 and the pipe, Maintenance and replacement can be performed by easily removing only the electromagnet portion 50.

  Further, the electromagnet part 50 is fixed to a concave part sandwiched between flange parts 211 provided at both ends of the mover storage part 21. For this reason, the diaphragm pump 10 can be reduced in size.

[Other embodiments]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.

  For example, in the said embodiment, although the structure which fixes the fluid suction / discharge part 60 to the base part 70 and attaches the case 20 was shown, it is not limited to this. That is, it is good also as a structure as shown in FIG. 4 and FIG. FIG. 4 is a plan sectional view of a diaphragm pump according to another embodiment. FIG. 5 is a side view showing a cross section of a part of the diaphragm pump according to another embodiment shown in FIG. 4 and 5, in the diaphragm pump 10 </ b> A, the case 20, the pedestal portion 70, and the fluid intake / exhaust portion 80 are integrally configured. And the electromagnet part 50 is being fixed to the electromagnet mounting part 72 standingly arranged by the base part 70. FIG. In this configuration, the fluid intake / exhaust portion 80 is formed in a substantially U-shaped cross section that sandwiches the two pump portions 22 of the case 20. The fluid suction / discharge portion 80 includes a suction portion 81 that communicates with a suction port 223 provided in the two pump portions 22, a discharge portion 82 that communicates with a discharge port 224 provided in the two pump portions 22, and a suction portion thereof. The parts 81 and the connection port 83 for connecting the discharge parts 82 are integrally formed. Thus, you may use the diaphragm pump 10A in which each member was integrally formed.

  Further, the inert gas sealed inside the mover storage unit 21 is not limited to a gas such as nitrogen gas or helium gas. That is, as the inert gas, a gas that can prevent oxidative deterioration of the diaphragm 40 can be appropriately selected according to the material of the diaphragm 40.

  Furthermore, in the said embodiment, although the structure which attaches the diaphragm 40 to the both ends of the needle | mover 30 was shown, it is not restricted to this. For example, a configuration in which the diaphragm 40 is attached only to one end of the mover 30 may be used. In this case, the pump unit 22 need only be attached to one side of the mover storage unit 21 corresponding to the diaphragm 40. In such a configuration, for example, when it is desired to use a diaphragm pump having a small intake / exhaust capability, a diaphragm pump having a low output can be provided. Moreover, since the pump part 22 and the fluid intake / exhaust part 60 can be comprised by one, size reduction can be accelerated | stimulated.

  In the above embodiment, the case 20 is detachably attached to the connection port 71 via the fluid intake / exhaust portion 60 by detachably attaching the fluid intake / exhaust portion 60 to the pipe fitting portion 71A of the connection port 71. Although the structure attached to is shown, it is not restricted to this. For example, the case 20 may be configured to be detachably attached to the fluid suction / discharge portion 60. Even in this configuration, the case 20 and the fluid intake / exhaust portion 60 can be easily separated, so that the maintenance of the diaphragm 40 and the like can be performed by removing only the case 20. In this case, the fluid intake / exhaust part 60 may be formed integrally with the base part 70.

  Further, the connection port 71 may not be provided. In this case, the diaphragm pump 10 can be connected by connecting a pipe directly to the pipe attachment portion 63 of the suction pipe 61 and the discharge pipe 62.

  In addition, the specific structure and procedure for carrying out the present invention can be changed as appropriate to other structures and the like within the scope of achieving the object of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used not only for a booster that boosts combustible gas such as city gas, but also for an intake / exhaust device that sucks and discharges air such as an air bed or an air mat, and an oxygen supply device that supplies oxygen. Furthermore, it can utilize also as a pump which sucks and discharges a liquid, not only what absorbs and discharges gas.

1 is an overall perspective view of a diaphragm pump according to an embodiment of the present invention. It is a plane sectional view of a diaphragm pump. It is the side view which carried out the cross section of a part of diaphragm pump. It is a plane sectional view of the diaphragm pump of other embodiments. FIG. 5 is a side view of a part of the diaphragm of the embodiment shown in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Diaphragm pump 21A Movable member storage chamber 22A Pump chamber 30 Movable member 32 Magnet 40 Diaphragm 50 Electromagnet part 53 Electromagnet 71 Connection port 223 Inlet port 224 Outlet port

Claims (10)

An electromagnet part comprising at least one pair of opposedly arranged electromagnets;
A mover provided between the electromagnets arranged opposite to each other and provided with a magnet on the side surface facing the electromagnet,
A flat diaphragm provided at an end of the mover;
The cylinder end is sealed to the inner peripheral surface of the cylinder end, and the mover is reciprocally held along the axis inside the cylinder. A case provided with a pump chamber having a suction port for sucking fluid and a discharge port for discharging fluid formed by being partitioned by the diaphragm in the section;
A diaphragm pump comprising:
The electromagnet part is arranged outside the case. A diaphragm pump according to the invention. The diaphragm pump according to claim 1,
The case includes a mover storage chamber that is formed continuously with the pump chamber and stores the mover.
The diaphragm pump is characterized in that the mover storage chamber is sealed. The diaphragm pump according to claim 2,
The diaphragm storage chamber is sealed with an inert gas sealed therein. The diaphragm pump according to any one of claims 1 to 3,
The electromagnet portion is disposed so as to be exposed to be in contact with outside air. The diaphragm pump according to any one of claims 1 to 4, wherein
The electromagnet portion is disposed at a position that is spaced from the outer peripheral surface of the case by a predetermined distance and does not contact the case. The diaphragm pump according to any one of claims 1 to 5,
The diaphragm pump is provided at both ends of the mover. The diaphragm pump according to claim 6, wherein
The pump chamber is provided at both ends of the mover storage chamber facing the diaphragm,
A diaphragm pump comprising a connection port for connecting the suction ports and the discharge ports of the pump chamber. The diaphragm pump according to claim 7,
The case is characterized in that the case is detachably attached to the connection port. The diaphragm pump according to any one of claims 7 and 8,
Comprising a base body to which the case and the electromagnet portion are attached;
The connection port is provided integrally with the base body. A diaphragm pump according to the present invention. The diaphragm pump according to any one of claims 1 to 9,
The diaphragm is characterized in that the case is formed of a non-conductive material.

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