CN212055068U

CN212055068U - Electromagnetic diaphragm pump

Info

Publication number: CN212055068U
Application number: CN202020500869.3U
Authority: CN
Inventors: 郭福和; 郭开元
Original assignee: Jilin Yinyi Machinery Equipment Manufacturing Co ltd
Current assignee: JILIN ORIENT PETROCHEMICAL PUMP Co.,Ltd.
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-12-01
Anticipated expiration: 2030-04-08

Abstract

An electromagnetic diaphragm pump comprising a frame, an electromagnet enclosed in the frame, a rod-like oscillator driven by the electromagnet to move back and forth in an axial direction, two diaphragms disposed at opposite ends; both ends of the oscillator and the diaphragms at the respective ends constitute side walls which are connected to symmetrical pressure chambers formed by symmetrical housings which are fitted to the both side frames in such a manner as to cover each diaphragm, each housing including a suction port and a discharge port each connected to the pressure chamber, wherein a suction-side check valve is disposed between the suction port and the pressure chamber, and a discharge-side check valve is disposed between the discharge port and the pressure chamber, allowing air to flow from the suction port into the pressure chamber when the suction-side check valve is opened, and preventing air from being discharged from the pressure chamber when closed; the discharge-side check valve allows air to be discharged from the pressure chamber to the discharge port when opened, and prevents air from flowing into the pressure chamber when closed.

Description

Electromagnetic diaphragm pump

Technical Field

The utility model relates to an electromagnetic diaphragm pump belongs to diaphragm pump technical equipment field.

Background

The diaphragm pump on the existing market generally has the phenomenon of unstable movement when the pressure cavity is under high pressure, and the diaphragm pump designed for solving the phenomenon has too complex structure.

SUMMERY OF THE UTILITY MODEL

In order to solve the disadvantages and shortcomings, the utility model provides an electromagnetic diaphragm pump.

The utility model discloses a solve the technical scheme that technical problem adopted as follows:

an electromagnetic diaphragm pump comprising a frame, an electromagnet enclosed in the frame, a rod-like oscillator driven by the electromagnet to move back and forth in an axial direction, two diaphragms disposed at opposite ends; both ends of the oscillator and the diaphragms at the respective ends constitute side walls which are connected to symmetrical pressure chambers formed by symmetrical housings which are fitted to the both side frames in such a manner as to cover each diaphragm, each housing including a suction port and a discharge port each connected to the pressure chamber, wherein a suction-side check valve is disposed between the suction port and the pressure chamber, and a discharge-side check valve is disposed between the discharge port and the pressure chamber, allowing air to flow from the suction port into the pressure chamber when the suction-side check valve is opened, and preventing air from being discharged from the pressure chamber when closed; the discharge-side check valve allows air to be discharged from the pressure chamber to the discharge port when opened, and prevents air from flowing into the pressure chamber when closed; the electromagnet includes a pair of electromagnet elements each including an M-shaped core and a coil formed by winding a wire on the core, each of the electromagnet elements being arranged at a symmetrical and prescribed distance such that the coils are opposed two by two; between each electromagnet element, a rod oscillator is arranged so that it can move back and forth in the axial direction; the oscillator comprises, in the middle part, two permanent magnets extending through the magnetic field lines generated by the electromagnets; at the opposite ends of the oscillator, made of elastic material, each diaphragm is fixed to the frame using a central plate arranged in an intermediate position and is all hermetically fixed to the two ends of the oscillator; each housing is fixed to the frame and sealed so as to be integrated with the frame; as a pressure chamber, the volume of which expands and contracts as the oscillator moves back and forth, causing the diaphragm to bend in a direction perpendicular to the plane of the diaphragm; for the other side opposite to the diaphragm forming the pressure chamber, an intake side check valve is installed at a position corresponding to the air intake port, and a discharge side check valve is disposed at a position corresponding to the discharge port.

As a preferable aspect of the present invention, the suction side check valve is a so-called poppet valve including a disk-shaped valve body of an elastic material and a shaft provided at a center side, the suction side check valve having such a structure is fixed to the housing, and the shaft is fitted into a shaft hole of the housing from inside of the pressure chamber; in each housing, a plurality of holes connecting the pressure chamber and the suction port are equally distributed on a circle centered on the shaft hole around the shaft hole; the disk-shaped valve body of the suction-side check valve has a size capable of covering a plurality of holes together, the plurality of holes being covered by the valve body when elastically bent, a peripheral portion of the valve body being in close contact with the housing, in which the peripheral portion of the valve is in close contact with the housing, serving as a valve seat of the suction-side check valve; in the suction side check valve used, the length of the shaft is determined such that when the suction side check valve is assembled to the housing, a certain spatial gap is provided between the peripheral portion of the valve and the valve seat, and the suction side check valve assembled to the housing in this state serves as a normally open check valve that is slightly open in a normal state; the suction side check valve is closed when the pressure in the pressure chamber elastically bends the valve body and brings the valve body into close contact with the valve seat.

As a preferable aspect of the present invention, the discharge side check valve is a so-called poppet valve having a structure similar to that of the suction side check valve, including a valve body of an elastic material, however, the discharge side check valve is fixed in a manner opposite to the suction side check valve, and a shaft is installed in a shaft hole of the housing, thereby fixing the discharge side check valve outside the pressure chamber; the length of the shaft of the discharge-side check valve is equal to the thickness of the housing, and when mounted to the housing, the discharge-side check valve is closed, and the valve body is in close contact with the valve seat, thus functioning as a normally-closed check valve; the discharge-side check valve opens when the elastic material valve body in the pressure chamber is bent and thus a space is created between the valve body and the valve seat.

As a preferred embodiment of the present invention, the suction side check valve is a normally open check valve, which is increased by the contraction of the volume of the pressure chamber when the pressure applied thereto is increased, and is opened when the volume of the pressure chamber is expanded, and is closed in the process of contracting the volume of the pressure chamber, and the time for which the suction side check valve is opened in the process of expanding the volume of the pressure chamber can be sufficiently long.

As a preferable mode of the present invention, the discharge-side check valve is a normally-closed check valve which is closed by the peripheral portion of the valve body coming into close contact with the valve seat and is opened only when the pressure thereon is increased by contraction of the volume of the pressure chamber.

The utility model discloses the beneficial effect who reaches is: 1. it is possible to ensure that a sufficient amount of air is alternately sucked into the paired pressure chambers; 2. it is possible to prevent mutual interference of the paired pressure chambers, or in other words, unstable operation of one pressure chamber that affects the operation of the other pressure chamber; 3. it is possible to prevent the operational balance between the paired pressure chambers from becoming unstable, and to eliminate the pressure difference that is liable to occur between the paired pressure chambers; 4. since it is possible to ensure that a stable amount of air is sucked into the paired pressure chambers even when the diaphragm pump is operated at a high operating pressure, the discharge pressure of the diaphragm pump can be easily kept constant and the above-described unstable phenomenon can be effectively prevented.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a partial enlarged view of the suction side of the present invention;

fig. 3 is a partially enlarged view of the discharge side of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 1, an electromagnetic diaphragm pump 1 includes a frame 2, an electromagnet 3 enclosed in the frame 2, a rod-shaped oscillator 4 driven by the electromagnet 3 to move back and forth in an axial direction, two diaphragms 5 provided at opposite ends, both ends of the oscillator 4 being formed with respective end diaphragms into side walls connected to symmetrical pressure chambers 6, the side walls being formed with symmetrical housing bodies 2c, the housing bodies 2c being fitted to the both side frames 2 in such a manner as to cover each diaphragm 5, each housing body 2c including a suction port 2a and a discharge port 2b, each suction port 2a and discharge port 2b being connected to the pressure chamber 6, wherein a suction-side check valve 7 is disposed between the suction port 2a and the pressure chamber 6, a discharge-side check valve 8 is disposed between the discharge port 2b and the pressure chamber 6, allowing air to flow from the suction port 2a into the pressure chamber 6 when the suction-side check valve 7 is opened, and prevents air from being discharged from the pressure chamber 6 when closed; the discharge-side check valve 8 allows air to be discharged from the pressure chamber 6 to the discharge port 2b when opened, and prevents air from flowing into the pressure chamber 6 when closed; the electromagnet 3 includes a pair of electromagnet elements 13, each electromagnet element 13 including an M-shaped core 11 and a coil 12 formed by winding a wire on the core 11, each electromagnet element 13 being arranged at a symmetrical and prescribed distance such that the coils 12 are opposed two by two; between each electromagnet element 13, a rod oscillator 4 is arranged so that it can move back and forth in the axial direction; the oscillator 4 comprises, in the central part, two permanent magnets 15, which extend through the magnetic field lines generated by the electromagnet 13; at the opposite ends of the oscillator 4, made of elastic material, each diaphragm 5 is fixed to the frame 2 using a central plate 16 arranged in an intermediate position and is all hermetically fixed to the two ends of the oscillator 4; each housing 2c is fixed to the frame and sealed so as to be integrated with the frame 2; as the pressure chamber 6, the volume thereof expands and contracts as the oscillator 4 moves back and forth, so that the diaphragm 5 is bent in the direction perpendicular to the diaphragm plane; to the other side opposite to the diaphragm forming the pressure chamber 6, an intake side check valve 7 is installed at a position corresponding to the air intake port 2a, and a discharge side check valve 8 is disposed at a position corresponding to the discharge port 2 b.

As shown in fig. 2, the suction-side check valve 7 is a so-called poppet valve including a disk-shaped valve body 17 of an elastic material and a shaft 17a provided on the center side. The suction-side check valve 7 having such a structure is fixed to the housing 2c, and the shaft 17a is fitted into the shaft hole 2d of the housing 2c from the inside of the pressure chamber 6; in each housing 2c, a plurality of holes 2e connecting the pressure chamber 6 and the suction port 2a are equally distributed on a circle centered on the shaft hole 2d around the shaft hole 2 d; the disc-shaped valve body 17 of the suction-side check valve 7 has a size capable of covering the plurality of holes 2e together, the plurality of holes 2e that the valve body 17 can cover when elastically bent, the peripheral portion 17b of the valve body 17 is in close contact with the housing 2c, and the housing 2c in which the peripheral portion 17b of the valve 17 is in close contact with the housing 2c serves as the valve seat 2h of the suction-side check valve 7; in the suction-side check valve 7 used, the length of the shaft 17a is determined so that when the suction-side check valve 7 is fitted to the housing 2c, the peripheral portion 17b of the valve has a certain spatial gap d with the valve seat 2h, and the suction-side check valve 7 fitted to the housing 2c in this state functions as a normally open check valve that is slightly open in the normal state; the suction side check valve 7 is closed when the pressure in the pressure chamber 6 elastically bends the valve body 17 and brings the valve body 17 into close contact with the valve seat 2 h.

As shown in fig. 3, the discharge-side check valve 8 is a so-called poppet valve, which is structured similarly to the suction-side check valve 7, and includes a valve body 18 of an elastic material, however, the discharge-side check valve 8 is fixed in a manner opposite to the suction-side check valve 7, and a shaft 18a is installed in a shaft hole 2d of the housing 2c, thereby fixing the discharge-side check valve 8 outside the pressure chamber 6; the length of the shaft 18a of the discharge-side check valve 8 is equal to the thickness of the housing 2c, and when mounted to the housing 2c, the discharge-side check valve 8 is closed, and the valve body 18 is in close contact with the valve seat 2h (the outer surface of the housing 2 c), thus functioning as a normally closed check valve; when the elastic material valve body 18 in the pressure chamber 6 is bent and thus a space is created between the valve body 18 and the valve seat 2h, the discharge-side check valve 8 is opened.

When an alternating voltage is applied to the electromagnet 3 of the electromagnetic diaphragm pump 1 having the above-described structure, a magnetic field alternating in accordance with the frequency of the alternating voltage is emitted from the oscillator 4-side end face, and due to the alternating magnetic field and the magnetic field generated by each permanent magnet 15, an attractive force and a repulsive force are generated between each M-shaped iron core 11 and the oscillator 4, so that each M-shaped iron core 11 has the attractive force and the repulsive force.

As shown by the arrows in fig. 1, the oscillator 4 oscillates reciprocally in the axial direction, and when the oscillator 4 reciprocates, the two diaphragms 5 connected to both ends of the oscillator 4 oscillate in the direction perpendicular to the diaphragm planes, so that the volumes of the two pressure chambers 6 on the left and right sides repeatedly expand and contract in a complementary manner.

When the volume of the pressure chamber 6 increases, the pressure in the pressure chamber 6 decreases, so that the suction-side check valve 7 opens and the discharge-side check valve 8 closes, so that air is sucked from the suction port 2a, while, when the volume of the pressure chamber 6 decreases, the pressure in the pressure chamber 6 increases, so that the suction-side check valve 7 closes and the discharge-side check valve 8 opens;

the suction-side check valve 7 is a normally open check valve, and when the pressure applied thereto is increased by the contraction of the volume of the pressure chamber 6 and is opened when the volume of the pressure chamber 6 is expanded, and is closed during the contraction of the volume of the pressure chamber 6, the time during which the suction-side check valve 7 is opened during the expansion of the volume of the pressure chamber 6 can be sufficiently long; the discharge-side check valve 8 is a normally-closed check valve that is closed by the peripheral portion 18b of the valve body 18 coming into close contact with the valve seat 2h, and opens only when the pressure thereon increases by contraction of the volume of the pressure chamber 6.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnetic diaphragm pump comprising a frame, an electromagnet enclosed in the frame, a rod-like oscillator driven by the electromagnet to move back and forth in an axial direction, two diaphragms disposed at opposite ends; both ends of the oscillator and the diaphragms at the respective ends constitute side walls which are connected to symmetrical pressure chambers formed by symmetrical housings which are fitted to the both side frames in such a manner as to cover each diaphragm, each housing including a suction port and a discharge port each connected to the pressure chamber, wherein a suction-side check valve is disposed between the suction port and the pressure chamber, and a discharge-side check valve is disposed between the discharge port and the pressure chamber, allowing air to flow from the suction port into the pressure chamber when the suction-side check valve is opened, and preventing air from being discharged from the pressure chamber when closed; the discharge-side check valve allows air to be discharged from the pressure chamber to the discharge port when opened, and prevents air from flowing into the pressure chamber when closed; the electromagnet includes a pair of electromagnet elements each including an M-shaped core and a coil formed by winding a wire on the core, each of the electromagnet elements being arranged at a symmetrical and prescribed distance such that the coils are opposed two by two; between each electromagnet element, a rod oscillator is arranged so that it can move back and forth in the axial direction; the oscillator comprises, in the middle part, two permanent magnets extending through the magnetic field lines generated by the electromagnets; at the opposite ends of the oscillator, made of elastic material, each diaphragm is fixed to the frame using a central plate arranged in an intermediate position and is all hermetically fixed to the two ends of the oscillator; each housing is fixed to the frame and sealed so as to be integrated with the frame; as a pressure chamber, the volume of which expands and contracts as the oscillator moves back and forth, causing the diaphragm to bend in a direction perpendicular to the plane of the diaphragm; for the other side opposite to the diaphragm forming the pressure chamber, an intake side check valve is installed at a position corresponding to the air intake port, and a discharge side check valve is disposed at a position corresponding to the discharge port.

2. An electromagnetic diaphragm pump according to claim 1, wherein said suction side check valve is a so-called poppet valve comprising a disk-shaped valve body of an elastic material and a shaft provided at a center side, the suction side check valve having such a structure is fixed to the housing, and the shaft is fitted into a shaft hole of the housing from the inside of the pressure chamber; in each housing, a plurality of holes connecting the pressure chamber and the suction port are equally distributed on a circle centered on the shaft hole around the shaft hole; the disk-shaped valve body of the suction-side check valve has a size capable of covering a plurality of holes together, the plurality of holes being covered by the valve body when elastically bent, a peripheral portion of the valve body being in close contact with the housing, in which the peripheral portion of the valve is in close contact with the housing, serving as a valve seat of the suction-side check valve; in the suction side check valve used, the length of the shaft is determined such that when the suction side check valve is assembled to the housing, a certain spatial gap is provided between the peripheral portion of the valve and the valve seat, and the suction side check valve assembled to the housing in this state serves as a normally open check valve that is slightly open in a normal state; the suction side check valve is closed when the pressure in the pressure chamber elastically bends the valve body and brings the valve body into close contact with the valve seat.

3. An electromagnetic diaphragm pump according to claim 1, characterized in that said discharge side check valve is a so-called poppet valve which is constructed like the suction side check valve and comprises a valve body of an elastic material, however, the discharge side check valve is fixed in the opposite manner to the suction side check valve, and the shaft is fitted in the shaft hole of the housing, thereby fixing the discharge side check valve outside the pressure chamber; the length of the shaft of the discharge-side check valve is equal to the thickness of the housing, and when mounted to the housing, the discharge-side check valve is closed, and the valve body is in close contact with the valve seat, thus functioning as a normally-closed check valve; the discharge-side check valve opens when the elastic material valve body in the pressure chamber is bent and thus a space is created between the valve body and the valve seat.

4. An electromagnetic diaphragm pump according to claim 1, wherein said suction side check valve is a normally open check valve which is opened for a sufficient time in expanding the volume of the pressure chamber when the pressure applied thereto is increased by the contraction of the volume of the pressure chamber and is opened when the volume of the pressure chamber is expanded and is closed in contracting the volume of the pressure chamber.

5. An electromagnetic diaphragm pump according to claim 1, wherein said discharge-side check valve is a normally-closed check valve which is closed by a peripheral portion of the valve body being in close contact with the valve seat and which opens only when the pressure thereon is increased by contraction of the volume of the pressure chamber.