CN111878368A - Intelligent control diaphragm pump - Google Patents

Abstract

The invention overcomes the shortcomings of the prior art, provides an intelligently controlled diaphragm pump, integrates a pressure sensor into the pump body, realizes pressure protection and liquid shortage detection by intelligently controlling the working state of the motor, and increases the driving force at the same time. Under the premise of the shaft diameter and the thicker wall thickness of the eccentric wheel, the size of the whole machine does not change, which greatly improves the service life of the whole machine; in order to solve the above technical problems, the technical scheme adopted in the present invention is: an intelligently controlled diaphragm pump, It includes a diaphragm pump body, the input cavity and the output cavity of the diaphragm pump body are provided with a pressure sensor, the pressure sensor is electrically connected with the motor control module of the diaphragm pump body, and the operation of the motor is controlled by the signal collected by the pressure sensor state to realize the intelligent control of the diaphragm pump body.

Description

An intelligently controlled diaphragm pump

technical field

The invention relates to an intelligently controlled diaphragm pump, which belongs to the technical field of diaphragm pumps.

Background technique

The traditional diaphragm pump cannot realize pressure protection and liquid shortage detection. The pressure generated by the diaphragm pump is too large, which will have adverse effects and easily damage other precision parts in the system. In this case, an external sensor is often connected, but it is not easy to install. , the pipeline is prone to leakage, the integration is poor, and the use cost is high. Once the liquid is lacking, the solution will damage the diaphragm pump. In addition, the diaphragm pump motor drives the cam to rotate through the drive shaft. In the process of miniaturization of the diaphragm pump, it is found that the drive shaft and the eccentric There are certain problems between the wheels. If the drive shaft is too thick, the wall thickness of the eccentric wheel will be too thin. On the contrary, the drive shaft will be too thin. At present, in order to take into account the performance of the two and the overall compact structure of the diaphragm pump, the drive shaft is too thin. And the problem that the wall thickness of the eccentric wheel is too thin, which leads to the high damage rate of the two during the working process, which affects the service life of the whole machine.

SUMMARY OF THE INVENTION

The invention overcomes the deficiencies in the prior art, provides an intelligently controlled diaphragm pump, integrates a pressure sensor into the pump body, realizes pressure protection and liquid shortage detection by intelligently controlling the working state of the motor, and simultaneously increases the drive Under the premise of the shaft diameter and the thickening of the eccentric wheel wall thickness, the size of the whole machine has not changed, which greatly improves the service life of the whole machine.

In order to solve the above technical problems, the technical solution adopted in the present invention is: an intelligently controlled diaphragm pump, comprising a diaphragm pump body, and a pressure sensor is arranged in both the input cavity and the output cavity of the diaphragm pump body, and the pressure The sensor is electrically connected to the motor control module of the diaphragm pump body, and the working state of the motor is controlled by the signal collected by the pressure sensor to realize the intelligent control of the diaphragm pump body;

The structure of the diaphragm pump body: including a motor, a pump body, a diaphragm, a valve lower plate, a valve plate and a valve upper plate, the motor body is fixedly arranged on the outside of the pump body, and the diaphragm is arranged under the pump body and the valve Between the plates, the valve upper plate presses the valve plate on the upper side of the valve lower plate, and the pump body is provided with an integrated eccentric piece, and the integrated eccentric piece includes an ejector rod, a bearing outer ring, a bearing ball, The inner ring of the bearing and the eccentric wheel are integrally formed. The power output shaft of the motor penetrates the pump body and is inserted into the eccentric through hole of the eccentric wheel, and the power output shaft of the motor is connected to the eccentric wheel through screws. Fixed together, the outer ring of the bearing and the bearing ball are matched and arranged on the inner ring of the bearing, the value of the ejector pin is fixed on the outer upper part of the outer ring of the bearing, and the upper end of the ejector pin is connected with the diaphragm, through the eccentricity The wheel drives the outer ring of the bearing to push the top rod to reciprocate up and down, and drive the diaphragm to work;

The upper side of the valve upper plate is provided with two detection holes, and the two detection holes are respectively connected with the liquid inlet pipe and the liquid outlet pipe. The upper side of the detection hole is provided with an annular sealing groove, the sealing A sealing member is arranged in the groove, the circuit board is horizontally fitted on the upper side of the detection hole, and cooperates with the sealing member to form a seal to block the detection hole, and the outer edge of the circuit board is matched with the inner side of the outer edge of the valve upper plate. , and a casing seal is arranged between the outer edge of the circuit board and the inner side of the outer edge of the valve upper plate, the underside of the circuit board is painted with anti-corrosion and waterproof coating, and the underside of the circuit board located in the detection hole is fixed. A pressure sensor is provided, the pressure of the liquid in the liquid inlet pipeline and the liquid outlet pipeline is monitored by the pressure sensor, and the pressure sensor is electrically connected with the motor control module of the diaphragm pump body.

The outer diameter of the inner ring of the bearing and the eccentric wheel are the same.

The wall thickness of the eccentric wheel is greater than 1 mm.

The connecting wire of the circuit board is electrically connected to the motor control module of the diaphragm pump body through the wire outlet seal.

The motor control module of the diaphragm pump body is a PLC module.

Compared with the prior art, the present invention has the following beneficial effects: the present invention integrally forms the eccentric wheel and the bearing inner ring to form an eccentric bearing, which is equivalent to increasing the thickness of the bearing inner ring on the outside of the existing eccentric wheel, so that the eccentric The wall thickness of the wheel is further thickened, that is, under the condition of a certain wall thickness, the present invention can further thicken the power output shaft of the motor, and the size of the whole machine is not changed, but the service life of the whole machine is greatly improved. The working state can adjust the pressure of the liquid and realize intelligent control.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic diagram of the connection between the valve upper board and the circuit board in the present invention.

FIG. 3 is a bottom view of the circuit board in the present invention.

Fig. 4 is a cross-sectional view of the input cavity in the valve upper plate of the present invention.

5 is a cross-sectional view of the output cavity in the valve upper plate of the present invention.

6 is a schematic structural diagram of a diaphragm pump body in the present invention.

7 is an exploded schematic diagram of the diaphragm pump body in the present invention.

FIG. 8 is a schematic structural diagram of an integrated eccentric member in the present invention.

FIG. 9 is a schematic diagram of an eccentric structure in the prior art.

In the figure: 1 is the diaphragm pump body, 11 is the motor, 12 is the pump body, 13 is the diaphragm, 14 is the valve lower plate, 15 is the valve plate, 16 is the valve upper plate, 17 is an integrated eccentric piece, and 171 is the ejector rod , 172 is bearing outer ring, 173 is bearing ball, 174 is bearing inner ring, 175 is eccentric, 2 is pressure sensor, 3 is circuit board, 4 is detection hole, 5 is sealing groove, 6 is seal, 7 is Shell seal, 8 is anti-corrosion waterproof coating, 9 is outlet seal.

Detailed ways

As shown in FIG. 1 to FIG. 9 , an intelligently controlled diaphragm pump of the present invention includes a diaphragm pump body 1 , and a pressure sensor 2 is arranged in both the input cavity and the output cavity of the diaphragm pump body 1 . The sensor 2 is electrically connected with the motor control module of the diaphragm pump body 1, and the working state of the motor is controlled by the signal collected by the pressure sensor 2 to realize the intelligent control of the diaphragm pump body 1;

The structure of the diaphragm pump body 1 includes a motor 11, a pump body 12, a diaphragm 13, a valve lower plate 14, a valve plate 15 and a valve upper plate 16. The body of the motor 11 is fixedly arranged on the outside of the pump body 12, so The diaphragm 13 is arranged between the pump body 12 and the valve lower plate 14, the valve upper plate 16 presses the valve plate 15 on the upper side of the valve lower plate 14, and the pump body 12 is provided with an integrated eccentric 17. , the one-piece eccentric 17 includes an ejector rod 171, a bearing outer ring 172, a bearing ball 173, a bearing inner ring 174 and an eccentric wheel 175, the bearing inner ring 174 and the eccentric wheel 175 are integrally formed, and the power of the motor 11 The output shaft penetrates the pump body 12 and is inserted into the eccentric through hole of the eccentric wheel 175, and the power output shaft of the motor 11 and the eccentric wheel 175 are fixed together by screws. On the inner ring 174, the ejector rod 171 is numerically fixed on the upper outer side of the bearing outer ring 172, and the upper end of the ejector rod 171 is connected with the diaphragm 13, and the bearing outer ring 172 is driven by the eccentric wheel 175 to push the ejector rod 171 up and down. The reciprocating motion drives the diaphragm 13 to work;

The upper side of the valve upper plate 16 is provided with two detection holes 4, the two detection holes 4 are respectively connected with the liquid inlet pipeline and the liquid outlet pipeline, and the upper side of the detection hole 4 is provided with an annular sealing groove. 5. A sealing member 6 is provided in the sealing groove 5. The circuit board 3 is horizontally fitted on the upper side of the detection hole 4, and cooperates with the sealing member 6 to form a seal to block the detection hole 4. The circuit board 3 The outer edge of the valve upper plate 16 is matched with the inner side of the outer edge of the valve upper plate 16, and a housing seal 7 is provided between the outer edge of the circuit board 3 and the inner side of the outer edge of the valve upper plate 16, and the lower side of the circuit board 3 is painted with anti-corrosion The waterproof coating 8, the lower side of the circuit board 3 located in the detection hole 4 is fixedly provided with a pressure sensor 2, and the pressure sensor 2 monitors the pressure of the liquid in the liquid inlet pipeline and the liquid outlet pipeline, and the pressure sensor 2 and the diaphragm The motor control module of the pump body 11 is electrically connected.

The outer diameter of the bearing inner ring 174 and the eccentric wheel 175 are the same.

The wall thickness of the eccentric wheel 175 is greater than 1 mm.

The connecting wire of the circuit board 3 is electrically connected to the motor control module of the diaphragm pump body 11 through the outlet seal 9 .

The motor control module of the diaphragm pump body 11 is a PLC module.

The invention integrates the eccentric wheel and the bearing inner ring to form an eccentric bearing, which is equivalent to increasing the thickness of the bearing inner ring on the outside of the existing eccentric wheel, so that the wall thickness of the eccentric wheel is further thickened, that is, when the wall thickness is constant The present invention can further thicken the power output shaft of the motor without changing the size of the whole machine, but greatly improve the service life of the whole machine.

In the present invention, the bearing outer ring 172 can also be inserted into the sleeve, and the ejector rod 171 is fixedly arranged outside the sleeve.

The present invention is easy to install and saves the process of installing the eccentric wheel. Compared with the prior art as shown in FIG. 4 , on the premise that other parameters of the pump body are the same, a thicker motor shaft diameter can be used.

The invention realizes the reduction of labor cost and material loss (in the prior art, the eccentric wheel is easy to damage the bearing when the inner ring of the bearing is riveted and installed), and the invention increases the load capacity of the pump, improves the performance of the product, and prolongs the life of the product.

The invention combines the eccentric wheel and the inner ring of the bearing to form an eccentric bearing, and the positioning ring and the eccentric bearing are integrally injection-molded.

The invention drives the integral positioning ring (eccentric structure) by the motor to convert the rotary motion into the up and down reciprocating motion to push the diaphragm up and down to reciprocate, so that the volume in the compression chamber changes.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various kind of change.

Claims (5)

1. The intelligent control diaphragm pump is characterized by comprising a diaphragm pump body (1), wherein pressure sensors (2) are arranged in an input cavity and an output cavity of the diaphragm pump body (1), the pressure sensors (2) are electrically connected with a motor control module of the diaphragm pump body (1), and the working state of a motor is controlled through signals collected by the pressure sensors (2) to realize intelligent control on the diaphragm pump body (1);

the structure of the diaphragm pump body (1): the pump comprises a motor (11), a pump body (12), a diaphragm (13), a lower valve plate (14), a valve plate (15) and an upper valve plate (16), wherein a body of the motor (11) is fixedly arranged on the outer side of the pump body (12), the diaphragm (13) is arranged between the pump body (12) and the lower valve plate (14), the valve plate (15) is pressed on the upper side of the lower valve plate (14) by the upper valve plate (16), an integrated eccentric part (17) is arranged in the pump body (12), the integrated eccentric part (17) comprises a push rod (171), a bearing outer ring (172), a bearing ball (173), a bearing inner ring (174) and an eccentric wheel (175), the bearing inner ring (174) and the eccentric wheel (175) are integrally formed, a power output shaft of the motor (11) penetrates through the pump body (12) and then is inserted into an eccentric through hole of the eccentric wheel (175), and the power output shaft of the motor (11) is fixed with the eccentric wheel, the bearing outer ring (172) and the bearing balls (173) are arranged on the bearing inner ring (174) in a matching mode, the numerical value of the ejector rod (171) is fixed to the upper portion of the outer side of the bearing outer ring (172), the upper end of the ejector rod (171) is connected with the diaphragm (13), the bearing outer ring (172) is driven by the eccentric wheel (175) to push the ejector rod (171) to reciprocate up and down, and the diaphragm (13) is driven to work;

two detection holes (4) are formed in the upper side of the valve upper plate (16), the two detection holes (4) are respectively communicated with a liquid inlet pipeline and a liquid outlet pipeline, an annular sealing groove (5) is formed in the upper side of each detection hole (4), a sealing element (6) is arranged in each sealing groove (5), the circuit board (3) is horizontally attached to the upper side of each detection hole (4) and matched with the sealing element (6) to form sealing to seal the detection holes (4), the outer edge of the circuit board (3) is matched with the inner side of the outer edge of the valve upper plate (16), a shell sealing element (7) is arranged between the outer edge of the circuit board (3) and the inner side of the outer edge of the valve upper plate (16), an anti-corrosion waterproof coating (8) is coated on the lower side of the circuit board (3), and a pressure sensor (2) is fixedly arranged on the lower side of the circuit board (3) positioned in each, the pressure of liquid in the liquid inlet pipeline and the liquid outlet pipeline is monitored through the pressure sensor (2), and the pressure sensor (2) is electrically connected with the motor control module of the diaphragm pump body (11).

2. A intelligently controlled membrane pump according to claim 1, characterised in that the outer diameter of the inner bearing ring (174) and the eccentric (175) are of the same size.

3. A intelligently controlled membrane pump according to claim 1, characterised in that the wall thickness of the eccentric (175) is more than 1 mm.

4. An intelligently controlled membrane pump according to claim 1, characterised in that the connection wires of the circuit board (3) are electrically connected with the motor control module of the membrane pump body (11) through the outlet seal (9).

5. An intelligently controlled membrane pump according to claim 1 or 4, characterised in that the motor control module of the membrane pump body (11) is a PLC module.

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