ELASTIC DIAPHRAGM PUMP

Abstract

An elastic diaphragm pump comprises a fixed housing (1). A motor (2) is fixedly connected to a lower portion of the fixed housing. One end of an output shaft of the motor extends into the fixed housing, and is fixedly connected to a gear (3). A central shaft (4) is rotatably connected between inner walls of the fixed housing. A transmission gear (5) and an eccentric wheel (6) are sequentially and rotatably connected to a surface of the central shaft. A pull rod (7) is rotatably connected to a surface of the eccentric wheel. A lower fixed seat (8) is fixedly connected to an upper portion of the fixed housing. An elastic diaphragm (9) is provided on an upper portion of the lower fixed seat. A nut (10) is fixedly connected to the center of the elastic diaphragm. An upper suction cover (11) is provided on an upper portion of the elastic diaphragm.A conversion valve (12) is fixedly connected to one end of the upper suction cover. A water inlet check valve (13) and a water outlet check valve (14) are sequentially and fixedly connected to an inner part of the conversion valve. The elastic diaphragm pump solves the problem in which mechanical components of a pump are worn by impurities in a liquid during use, resulting in poor sealing performance, water leakage during use, and a short service life. (Figure for abstract: Fig.2).

Description

Title of the invention: ELASTIC MEMBRANE PUMP Technical field

[0001] The present invention relates to the field of pump technologies, and more particularly, to an elastic membrane pump. BACKGROUND of the technique

[0002] Pumps currently on the market are classified into centrifugal pumps and positive displacement pumps. The centrifugal pump cannot produce a vacuum, but can be used to pump water with a lot of impurities. The positive displacement pump can produce a vacuum, but the mechanical components of the pump are worn by the impurities in the liquid during use, resulting in poor sealing performance, water leakage during use, and a short service life. PRESENTATION OF THE INVENTION Technical problem to be solved

[0003] In order to overcome the shortcomings of the prior art, the present invention provides an elastic diaphragm pump, which solves the problem in which mechanical components are worn by impurities in a liquid during use of the pump, resulting in poor sealing performance, water leakage during use, and a short service life. Technical solution

[0004] To achieve the above-mentioned objective, the present invention is implemented using the following technical solution:

[0005] An elastic diaphragm pump includes a fixed housing, where a motor is fixedly connected to a lower portion of the fixed housing; one end of an output shaft of the motor extends into the fixed housing, and is fixedly connected to a gear; a central shaft is rotatably connected between inner walls of the fixed housing; a transmission gear and an eccentric wheel are sequentially and rotatably connected to the surface of the central shaft; a pull rod is rotatably connected to the surface of the eccentric wheel; a lower fixed seat is fixedly connected to an upper portion of the fixed housing; an elastic diaphragm is provided on an upper portion of the lower fixed seat; a nut is fixedly connected to the center of the elastic diaphragm, and one end of the pull rod which is away from the eccentric wheel is in threaded connection with the nut;an upper suction cover is provided on an upper portion of the elastic membrane, and a conversion valve is fixedly connected to one end of the cover; upper suction; and a water inlet check valve and a water outlet check valve are sequentially and fixedly connected to an internal part of the conversion valve.

[0006] Preferably, the gear and the transmission gear are hypoid gears and are connected by engagement.

[0007] Preferably, the transmission gear and the eccentric wheel are injection molded in one piece, and the eccentric wheel has an eccentric distance of 1.3 mm.

[0008] Preferably, one end of the conversion valve that is close to the water inlet check valve is a water inlet end, and one end of the conversion valve that is close to the water outlet check valve is a water outlet end.

[0009] Preferably, the elastic membrane is a rubber membrane, and the elastic membrane and the nut are bonded by vulcanization. Beneficial effects

[0010] The present invention provides an elastic diaphragm pump, which has the following advantageous effects:

[0011] In the elastic diaphragm pump of the present invention, a motor is fixedly connected to a lower portion of a fixed housing, one end of an output shaft of the motor extends into the fixed housing and is fixedly connected to a gear, a central shaft is rotatably connected between inner walls of the fixed housing, a transmission gear and an eccentric wheel are sequentially and rotatably connected to the surface of the central shaft, and a pull rod is rotatably connected to a surface of the eccentric wheel. By means of meshing drive with the gears, the motor rotates the eccentric wheel, thereby driving the pull rod to move up and down. A lower fixed seat is fixedly connected to the upper portion of the fixed housing, an elastic diaphragm is provided on the upper portion of the lower fixed seat, and a nut is fixedly connected to the center of the elastic diaphragm.One end of the pull rod which is far away from the eccentric wheel is in threaded connection with the nut. A suction force is produced when the pull rod moves up and down to drive the pull rod to move up and down, and water supply is realized by using check valves, which prevents impurities in a liquid from wearing out mechanical components and improves the sealing performance. In addition, water leakage is prevented during use, which prolongs the service life of the pump. Brief description of the drawings

[0012] [Fig.l] is a schematic diagram of an overall structure of the present invention;

[0013] [Fig.2] is a schematic diagram of an internal structure of the present invention; and

[0014] [Fig.3] is seen in section in the direction AA of [Fig.2] in the present invention.

[0015] Meaning of numbers: 1. Fixed housing, 2. Motor, 3. Gear, 4. Central shaft, 5. Transmission gear, 6. Eccentric wheel, 7. Pull rod, 8. Lower fixed seat, 9. Elastic membrane, 10. Nut, 11. Upper suction cover, 12. Conversion valve, 13. Water inlet check valve, and 14. Water outlet check valve DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present invention are clearly and fully described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some of the embodiments of the present invention rather than all of them. Based on the embodiments described in the present invention, other embodiments acquired by the average person skilled in the art without having to make any creative effort, all belong to the scope of protection of the present invention.

[0017] Referring to [Fig.l] to 3, the present invention provides the following technical solution: an elastic diaphragm pump includes a fixed housing 1. A lower portion of the fixed housing 1 is fixedly connected to the motor 2. One end of an output shaft of the motor 2 extends into the fixed housing 1, and is fixedly connected to the gear 3. The central shaft 4 is rotatably connected between inner walls of the fixed housing 1. The transmission gear 5 and the eccentric wheel 6 are sequentially and rotatably connected to the surface of the central shaft 4. The pull rod 7 is rotatably connected to the surface of the eccentric wheel 6, and the eccentric wheel 6 can drive the pull rod 7 to move up and down.The lower fixing bracket 8 is fixedly connected to the upper part of the fixed housing 1, the elastic membrane 9 is provided on the upper part of the lower fixed seat 8, and a nut 10 is fixedly connected to the center of the elastic membrane 9. One end of the pull rod 7 which is far away from the eccentric wheel 6 is in threaded connection with the nut 10, and a suction force can be produced when the pull rod 7 drives the elastic membrane 9 to move. An upper suction cover 11 is provided on the upper part of the elastic membrane 9, and the conversion valve 12 is fixedly connected to one end of the upper suction cover 11.

[0018] The water inlet check valve 13 and the water outlet check valve 14 are sequentially and fixedly connected to an inner part of the conversion valve 12. When the elastic membrane 9 moves downward, the water inlet check valve 13 is sucked open to let water in, while the water outlet check valve 14 is tightly sucked to block a water outlet direction. When the elastic membrane 9 moves upward, the water inlet check valve 13 is automatically closed, and water pushes the water outlet check valve 14 to open in this case, thereby discharging water.

[0019] The gear 3 and the transmission gear 5 are hypoid gears and are connected by engagement, so as to enable the motor 2 to drive the movement of the transmission gear 5.

[0020] The transmission gear 5 and the eccentric wheel 6 are injection molded in one piece. The eccentric wheel 6 has an eccentric distance of 1.3 mm, so that it can drive the pull rod 7 to move up and down.

[0021] One end of the conversion valve 12 which is close to the water inlet check valve 13 is a water inlet end, and one end of the conversion valve 12 which is close to the water outlet check valve 14 is a water outlet end.

[0022] The elastic membrane 9 is a rubber membrane, and the elastic membrane 9 and the nut 10 are bonded by vulcanization.

[0023] During use, the motor 2 drives the eccentric wheel 6 to rotate by means of a gear drive, and the eccentric wheel 6 drives the pull rod 7 to move up and down during rotation, thereby driving the elastic membrane 9 to move up and down. When the elastic membrane 9 moves downward, the water inlet check valve 13 is suctioned open to allow water to enter, while the water outlet check valve 14 is sealed to block a water outlet direction. When the elastic membrane 9 moves upward, the water inlet check valve 13 is automatically closed, and water pushes the water outlet check valve 14 to open in this case, thereby discharging water.

[0024] It should be noted that, in this specification, relationship terms such as "first", "second", etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between those entities or operations. Furthermore, the terms "include", "comprise" or any other variations of these terms are intended to cover non-exclusive inclusion, so that a process, method, product or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or further includes elements inherent in the process, method, product or to the device. In a case without any other limitations whatsoever, an element defined by "including a..." does not exclude that the process, procedure, product or device including the elements has in addition other identical elements.

[0025] Although the embodiments of the present invention have been shown and described above, one of ordinary skill in the art can make various changes, modifications, substitutions and transformations without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

Claims

1. An elastic diaphragm pump, comprising a fixed housing (1), wherein a lower portion of the fixed housing (1) is fixedly connected to the motor (2), one end of an output shaft of the motor (2) extends into the fixed housing (1), and is fixedly connected to the gear (3); the central shaft (4) is rotatably connected between inner walls of the fixed housing (1); the transmission gear (5) and the eccentric wheel (6) are sequentially and rotatably connected to a surface of the central shaft (4); the pull rod (7) is rotatably connected to a surface of the eccentric wheel (6); the lower fixed seat (8) is fixedly connected to the upper portion of the fixed housing (1), and the elastic diaphragm (9) is provided on the upper portion of the lower fixed seat (8);and a nut (10) is fixedly connected to the center of the elastic membrane (9), and one end of the pull rod (7) which is away from the eccentric wheel (6) is in threaded connection with the nut (10), an upper suction cover (11) is provided on the upper part of the elastic membrane (9), and the conversion valve (12) is fixedly connected to one end of the upper suction cover (11); the water inlet check valve (13) and the water outlet check valve (14) are sequentially and fixedly connected to an inner part of the conversion valve (12). and inside the conversion valve (12) are fixedly connected successively a water inlet check valve (13) and a water outlet check valve (14).;

2. An elastic diaphragm pump according to claim 1, wherein the gear (3) and the transmission gear (5) are hypoid gears and are connected by engagement.

3. An elastic diaphragm pump according to claim 1, wherein the transmission gear (5) and the eccentric wheel (6) are injection molded as a single piece, and the eccentric wheel (6) has an eccentric distance of 1.3 mm.

4. An elastic diaphragm pump according to claim 1, wherein one end of the conversion valve (12) which is near the water inlet check valve (13) is a water inlet end, and one end of the conversion valve (12) which is near the water outlet check valve (14) is a water outlet end.

5. An elastic diaphragm pump according to claim 1, wherein the elastic membrane (9) is a rubber membrane, and the elastic membrane (9) and the nut (10) are bonded by vulcanization.

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