CN113503247A

CN113503247A - Continuity diaphragm pump based on positive and negative screw drive

Info

Publication number: CN113503247A
Application number: CN202110758946.4A
Authority: CN
Inventors: 刘龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-10-15

Abstract

The invention belongs to the technical field of pumps, and particularly relates to a continuous diaphragm pump based on positive and negative thread transmission, which comprises a power mechanism and an elastic diaphragm; according to the invention, the first motor drives the rotating sleeve to rotate, so that the side wall of the first spiral groove generates thrust on the guide rod, the moving shaft is driven to move towards one end of the pump body, one elastic diaphragm deforms towards one side of the transfusion cavity, the pressure of liquid in the liquid storage cavity at the side is increased, the liquid in the liquid storage cavity enters the liquid discharge cavity, the other elastic diaphragm deforms towards one side of the mounting groove, the pressure of the liquid in the liquid storage cavity is reduced, the liquid in the liquid inlet cavity is sucked into the liquid storage cavity, after the moving shaft moves to the maximum displacement, the guide rod enters the second spiral groove from the first spiral groove, the moving shaft is driven to move in the opposite direction, the liquid storage cavity for discharging the liquid is refilled with the liquid, meanwhile, the liquid in the liquid storage cavity filled with the liquid is discharged out of the pump body, the above circulation is repeated, and the continuous conveying of the liquid is realized.

Description

Continuity diaphragm pump based on positive and negative screw drive

Technical Field

The invention belongs to the technical field of pumps, and particularly relates to a continuous diaphragm pump based on positive and negative thread transmission.

Background

The water pump is a machine for conveying liquid, and can be divided into a volumetric water pump, a vane pump and other types according to different working principles, the volumetric pump transfers energy by using the change of the volume of a working chamber of the volumetric pump, the diaphragm pump is a special form in the volumetric pump, and changes the volume of the working chamber by means of the back-and-forth movement of a diaphragm sheet, so that the pressure of the working chamber is changed, and liquid is sucked and discharged, and the diaphragm pump can be divided into pneumatic, electric and hydraulic, namely, a pneumatic diaphragm pump using compressed air as a power source, an electric diaphragm pump using electricity as a power source, and a hydraulic diaphragm pump using liquid medium pressure as power.

Most of the existing electric diaphragm pumps drive the diaphragm to do reciprocating movement through a slider-crank mechanism, so that the volume of a working cavity is changed alternately, thereby continuously sucking and discharging liquid.

Disclosure of Invention

In order to make up the defects of the prior art, the invention provides a continuous diaphragm pump based on positive and negative screw transmission. The invention is mainly used for solving the problems that the existing electric diaphragm pumps mostly drive the diaphragm to do reciprocating motion through the crank sliding block mechanism so as to continuously suck and discharge liquid, and the double diaphragm pumps have larger volume, complex structure and high processing cost due to the characteristics of the structure of the crank sliding block mechanism.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a continuous diaphragm pump based on positive and negative thread transmission, which comprises a pump body; a first mounting groove is formed in the middle of the pump body; a liquid discharge cavity is formed in the upper end of the pump body; the lower end of the pump body is provided with a liquid inlet cavity; two ends of the pump body are symmetrically provided with transfusion cavities; the upper end of the transfusion cavity is communicated with the liquid discharge cavity; the lower end of the transfusion cavity is communicated with the liquid inlet cavity; the upper end and the lower end of the transfusion cavity are provided with one-way valves; the one-way valve is used for realizing the closing and opening of the upper end and the lower end of the transfusion cavity; a liquid storage cavity is arranged between the transfusion cavity and the first mounting groove; the method is characterized in that: the diaphragm pump also comprises a power mechanism and an elastic diaphragm; the power mechanism comprises a rotating sleeve, a moving shaft, a worm wheel, a worm and a first motor; the first mounting groove is internally provided with the rotating sleeve; the rotating sleeve is rotationally connected with the pump body; the inner wall of the rotating sleeve is provided with a guide groove; the guide groove comprises a first spiral groove and a second spiral groove; the first spiral groove and the second spiral groove are symmetrically arranged on the inner wall of the rotating sleeve; the spiral direction of the first spiral groove is opposite to that of the second spiral groove; one end of the first spiral groove is communicated with one end of the second spiral groove; the other end of the first spiral groove is communicated with the other end of the second spiral groove; the moving shaft penetrates through the rotating sleeve; the moving shaft is in clearance fit with the rotating sleeve; the moving shaft is connected with the pump body in a sliding manner; the middle part of the moving shaft is provided with a guide rod; one end of the guide rod is connected with the moving shaft; the other end of the guide rod is clamped in the guide groove; the elastic diaphragms are symmetrically arranged at two ends of the moving shaft; the edge of the elastic diaphragm is fixedly connected with the pump body; the middle part of the elastic diaphragm is fixedly connected with the movable shaft; the worm wheel is arranged on the rotating sleeve; the worm wheel is fixedly connected with the rotating sleeve; the pump body is provided with the worm; the worm is rotationally connected with the pump body; the worm is meshed with the worm wheel; the first motor is arranged on the pump body; the first motor is fixedly connected with the pump body; the rotating shaft of the first motor and the worm are in transmission through a first belt.

When the device works, the diaphragm pump is fixed near the liquid to be conveyed, the liquid inlet cavity and the liquid are connected together by using a pipeline, the first motor rotates, the worm is driven to rotate by the first belt, the worm wheel is driven to rotate, the rotating sleeve is driven to rotate, the side wall of the first spiral groove in the rotating sleeve generates thrust on the side wall of the guide rod, the first spiral groove is connected with the pump body in a sliding way, the first spiral groove drives the moving shaft to move towards one end of the pump body through the guide rod, and then the two elastic diaphragms are deformed, one elastic diaphragm deforms towards one side of the transfusion cavity, so that the volume between the elastic diaphragm and the transfusion cavity is reduced, the pressure of the liquid in the liquid storage cavity at the side is increased, the liquid in the liquid storage cavity flows towards the liquid discharge cavity and the liquid inlet cavity respectively through the upper end and the lower end of the transfusion cavity, and the one-way valve at the upper end of the transfusion cavity is opened, simultaneously, the one-way valve below the transfusion cavity is closed, so that the liquid in the liquid storage cavity enters the liquid discharge cavity through the one-way valve at the upper end of the transfusion cavity, the liquid in the liquid storage cavity is discharged out of the pump body through the liquid discharge cavity, one elastic diaphragm deforms towards one side of the transfusion cavity while the other elastic diaphragm deforms towards one side of the mounting groove, so that the volume between the elastic diaphragm and the transfusion cavity is increased, the pressure of the liquid in the liquid storage cavity is reduced, the liquid in the liquid discharge cavity and the liquid inlet cavity flows into the transfusion cavity through the one-way valves at the upper end and the lower end of the transfusion cavity respectively, the one-way valve at the upper end of the transfusion cavity is closed, the one-way valve below the transfusion cavity is opened, the liquid in the liquid inlet cavity is sucked into the transfusion cavity through the one-way valve at the lower end of the transfusion cavity, the liquid enters the liquid storage cavity, and after the moving shaft moves to the maximum displacement, the guide rod enters the second spiral groove from the first spiral groove, because the spiral direction of the first spiral groove is opposite to that of the second spiral groove, the side wall of the second spiral groove generates reverse thrust on the guide rod, the second spiral groove drives the moving shaft to move in the reverse direction through the guide rod, the liquid storage cavity filled with the liquid is refilled with the liquid, the liquid in the liquid storage cavity filled with the liquid is discharged out of the pump body through the liquid discharge cavity, the circulation is repeated, and the continuous conveying of the liquid is further realized; most of the existing electric diaphragm pumps drive the diaphragm to move back and forth through the slider-crank mechanism, so that the volume of the working chamber changes alternately, thereby continuously sucking and discharging liquid, because of the characteristics of the structure of the slider-crank mechanism, the volume of the double-diaphragm pump is larger, the structure is complex, the processing cost is high, and the diaphragm pump is under the combined action of the guide groove and the guide rod, the rotation of the rotating sleeve is converted into the reciprocating linear movement of the moving shaft, and further the liquid is continuously sucked and discharged, the diaphragm occupies a smaller space, the structure is simple, the processing difficulty is low, and the cost is low.

Preferably, a second mounting groove is formed at the joint of the moving shaft and the guide rod; a bearing bush is arranged in the second mounting groove; the bearing bush is clamped in the second mounting groove; the guide rod is arranged in the bearing bush; the guide rod is rotatably connected with the bearing bush; the diameter of the guide rod is smaller than the opening width of the guide groove.

The guide rod and the bearing bush are connected in a rotating mode, the guide rod can rotate, the guide rod can roll on the side wall of the guide groove, the guide rod is prevented from sliding on the side wall of the guide groove, friction force between the guide rod and the guide groove is reduced, abrasion of the guide rod and the guide groove is reduced, matching precision of the guide rod and the guide groove is guaranteed, reliable work of a moving shaft is achieved, and reliable work of the diaphragm pump is achieved.

Preferably, one side of the elastic diaphragm, which is close to the guide rod, is provided with a first limiting plate; the first limiting plate is fixedly connected with the moving shaft; a second limiting plate is arranged on the other side of the elastic diaphragm; and the second limiting plate is fixedly connected with the movable shaft.

By arranging the first limiting plate, when the movable shaft drives the elastic diaphragm to deform towards one side of the infusion cavity, the elastic diaphragm is attached to the side face of the first limiting plate, so that the maximum bending angle of the elastic diaphragm is reduced, the elastic diaphragm is prevented from being damaged due to overlarge bending, the probability of damage of the elastic diaphragm is reduced, the elastic diaphragm is prevented from being damaged to influence suction and discharge of liquid, reliable work of the elastic diaphragm is achieved, and reliable work of the diaphragm pump is achieved; through setting up No. two limiting plates, when the removal axle drives elastic diaphragm and warp toward mounting groove one side, the laminating of elastic diaphragm is on the side of No. two limiting plates, and then reduces elastic diaphragm's the biggest angle of buckling, and then prevents that elastic diaphragm from producing the damage because of buckling too big, and then reduces the damaged probability of elastic diaphragm, and then prevents that elastic diaphragm from damaging the suction and the discharge that influence liquid, and then realizes elastic diaphragm's reliable work, and then realizes the reliable work of diaphragm pump.

As a first preferred scheme of the invention, flow guide grooves are arranged on the two second limiting plates; the diversion trenches are uniformly arranged at intervals.

Through set up the guiding gutter on No. two limiting plates, when the removal axle drives elastic diaphragm and warp toward mounting groove one side, the distance of elastic diaphragm and No. two limiting plate sides reduces, and then make the liquid between elastic diaphragm and No. two limiting plates flow out through the guiding gutter, and then the particulate matter between liquid and the No. two limiting plates takes away, and then there is the probability of granule between reduction elastic diaphragm and No. two limiting plates, and then reduce the probability of particulate matter bursting elastic diaphragm when elastic diaphragm and No. two limiting plates are pasted tightly, and then reduce the probability that elastic diaphragm damaged, and then prevent that elastic diaphragm from damaging the suction and the discharge that influence liquid, and then realize elastic diaphragm's reliable work, and then realize the reliable work of diaphragm pump.

As a second preferred scheme of the invention, elastic blocking pieces are arranged on the two second limiting plates; the elastic baffle is in a ring shape; the edge of the elastic separation blade is fixedly connected with the pump body; the middle part of the elastic blocking piece is fixedly connected with the edge of the second limiting plate.

Through setting up the elasticity separation blade, and then the elasticity separation blade prevents that liquid from getting into between elastic diaphragm and No. two limiting plates, and then avoids having granular material between elastic diaphragm and No. two limiting plates, and then prevents that granular material from bursting elastic diaphragm when elastic diaphragm and No. two limiting plates paste tightly, and then reduces the probability that elastic diaphragm damaged, and then prevents that elastic diaphragm from damaging the suction and the discharge that influence liquid, and then realizes elastic diaphragm's reliable work, and then realizes the reliable work of diaphragm pump.

Preferably, elastic pieces are arranged on the sides, far away from each other, of the two second limiting plates; the elastic piece is fixedly connected with the second limiting plate.

Set up the elastic component through the side at No. two limiting plates, before the removal axle moves the maximum displacement, the elastic component is contradicted earlier on the lateral wall in transfusion cavity, and then make the elastic component produce elasticity, when the removal axle moves the maximum displacement, the elasticity of elastic component reaches the biggest, and then elasticity promotes the removal axle toward reverse movement, and then make the guide bar automatic get into No. two helicla flutes from a helicla flute in, and then avoid the lateral wall of a helicla flute tip to cause the striking to the guide bar, and then prevent that the guide bar from receiving the damage because of the striking, and then reduce the probability that the guide bar damaged, and then realize the reliable work of guide bar, and then realize the reliable removal of removal axle, and then realize the reliable work of diaphragm pump.

Preferably, the elastic member is a spring; one end of the spring is fixedly connected with the second limiting plate; the other end of the spring is provided with a positioning column; one end of the positioning column is fixedly connected with the spring; the other end of the positioning column is provided with an arc structure; the arc structure is inosculated with the side wall of the transfusion cavity.

Through setting up the circular arc structure, when the circular arc structure is contradicted on the lateral wall in transfusion cavity, the lateral wall in transfusion cavity carries out the automatic guidance to the circular arc structure, and then advance the item automatic guidance to the spring, and then make the axis of spring and the axis of removal axle be on same straight line, and then reduce the spring and produce crooked probability because of being strikeed by liquid, and then prevent that the spring is crooked and reduce the elasticity of spring, and then make the elasticity of spring can promote removal axle antiport, and then make the guide bar automatic follow the helicla flute of one number of internal access No. two helicla flutes, and then avoid the lateral wall of a helicla flute tip to cause the striking to the guide bar, and then prevent that the guide bar from receiving the damage because of the striking, and then reduce the probability that the guide bar damaged, and then realize the reliable work of guide bar, and then realize the reliable removal of removal axle, and then realize the reliable work of diaphragm pump.

Preferably, tapered roller bearings are symmetrically arranged at two ends of the rotating sleeve; the outer ring of the tapered roller bearing is fixedly connected with the pump body; the inner ring of the tapered roller bearing is fixedly connected with the rotating sleeve; two ends of the rotating sleeve are symmetrically provided with baffles; the two baffles are arranged on two sides of the two tapered roller bearings; the baffle is fixedly connected with the pump body; the baffle plate penetrates through the moving shaft; key grooves are symmetrically formed in two ends of the moving shaft; a protruding structure is arranged at the position of the baffle corresponding to the key groove; the protruding structure is clamped in the key groove.

Set up tapered roller bearing through the both ends at the rotation cover, and then realize rotating the rotation of cover, tapered roller bearing can resist axial thrust simultaneously, and then prevents to rotate the cover and produce axial displacement under the effect of guide bar reaction force, and then realizes moving the reliable removal of axle, and then realizes the reliable work of diaphragm pump.

The invention has the following beneficial effects:

1. in the invention, a diaphragm pump is fixed near the liquid to be conveyed, a liquid inlet cavity and the liquid are connected together by a pipeline, a motor rotates, a worm is driven to rotate by a belt, a worm wheel is driven to rotate, a rotating sleeve is driven to rotate, the side wall of a spiral groove in the rotating sleeve generates thrust on the side wall of a guide rod, a moving shaft is connected with a pump body in a sliding way, a spiral groove drives the moving shaft to move towards one end of the pump body through the guide rod, two elastic diaphragms are deformed, one elastic diaphragm deforms towards one side of an infusion cavity, the volume between the elastic diaphragm and the infusion cavity is reduced, the pressure of the liquid in a liquid storage cavity at the side is increased, the liquid in the liquid storage cavity flows towards a liquid discharge cavity and the liquid inlet cavity through the upper end and the lower end of the infusion cavity respectively, and a one-way valve at the upper end of the infusion cavity is opened, simultaneously, the one-way valve below the transfusion cavity is closed, so that the liquid in the liquid storage cavity enters the liquid discharge cavity through the one-way valve at the upper end of the transfusion cavity, the liquid in the liquid storage cavity is discharged out of the pump body through the liquid discharge cavity, one elastic diaphragm deforms towards one side of the transfusion cavity while the other elastic diaphragm deforms towards one side of the mounting groove, so that the volume between the elastic diaphragm and the transfusion cavity is increased, the pressure of the liquid in the liquid storage cavity is reduced, the liquid in the liquid discharge cavity and the liquid inlet cavity flows into the transfusion cavity through the one-way valves at the upper end and the lower end of the transfusion cavity respectively, the one-way valve at the upper end of the transfusion cavity is closed, the one-way valve below the transfusion cavity is opened, the liquid in the liquid inlet cavity is sucked into the transfusion cavity through the one-way valve at the lower end of the transfusion cavity, the liquid enters the liquid storage cavity, and after the moving shaft moves to the maximum displacement, the guide rod enters the second spiral groove from the first spiral groove, because the spiral direction of the first spiral groove is opposite to that of the second spiral groove, the side wall of the second spiral groove generates reverse thrust on the guide rod, the second spiral groove drives the moving shaft to move in the reverse direction through the guide rod, the liquid storage cavity filled with the liquid is refilled with the liquid, the liquid in the liquid storage cavity filled with the liquid is discharged out of the pump body through the liquid discharge cavity, the circulation is repeated, and the continuous conveying of the liquid is further realized; most of the existing electric diaphragm pumps drive the diaphragm to move back and forth through the slider-crank mechanism, so that the volume of the working chamber changes alternately, thereby continuously sucking and discharging liquid, because of the characteristics of the structure of the slider-crank mechanism, the volume of the double-diaphragm pump is larger, the structure is complex, the processing cost is high, and the diaphragm pump is under the combined action of the guide groove and the guide rod, the rotation of the rotating sleeve is converted into the reciprocating linear movement of the moving shaft, and further the liquid is continuously sucked and discharged, the diaphragm occupies a smaller space, the structure is simple, the processing difficulty is low, and the cost is low.

2. According to the diaphragm pump, the guide rod is connected with the bearing bush in a rotating mode, so that the guide rod can rotate, the guide rod can roll on the side wall of the guide groove, the guide rod is prevented from sliding on the side wall of the guide groove, the friction force between the guide rod and the guide groove is reduced, the abrasion between the guide rod and the guide groove is reduced, the matching precision of the guide rod and the guide groove is guaranteed, the reliable work of the moving shaft is achieved, and the reliable work of the diaphragm pump is achieved.

3. According to the invention, the first limiting plate is arranged, when the moving shaft drives the elastic diaphragm to deform towards one side of the infusion cavity, the elastic diaphragm is attached to the side surface of the first limiting plate, so that the maximum bending angle of the elastic diaphragm is reduced, the elastic diaphragm is prevented from being damaged due to overlarge bending, the probability of damage of the elastic diaphragm is further reduced, the elastic diaphragm is prevented from being damaged to influence the suction and discharge of liquid, the reliable work of the elastic diaphragm is further realized, and the reliable work of the diaphragm pump is further realized; through setting up No. two limiting plates, when the removal axle drives elastic diaphragm and warp toward mounting groove one side, the laminating of elastic diaphragm is on the side of No. two limiting plates, and then reduces elastic diaphragm's the biggest angle of buckling, and then prevents that elastic diaphragm from producing the damage because of buckling too big, and then reduces the damaged probability of elastic diaphragm, and then prevents that elastic diaphragm from damaging the suction and the discharge that influence liquid, and then realizes elastic diaphragm's reliable work, and then realizes the reliable work of diaphragm pump.

4. According to the invention, the flow guide groove is formed in the second limiting plate, when the moving shaft drives the elastic diaphragm to deform towards one side of the mounting groove, the distance between the elastic diaphragm and the side face of the second limiting plate is reduced, so that liquid between the elastic diaphragm and the second limiting plate flows out through the flow guide groove, and further the liquid takes away granular substances between the elastic diaphragm and the second limiting plate, so that the probability of granules between the elastic diaphragm and the second limiting plate is reduced, the probability of the granular substances breaking the elastic diaphragm when the elastic diaphragm and the second limiting plate are tightly attached is reduced, the probability of damage to the elastic diaphragm is reduced, the elastic diaphragm is prevented from being damaged to influence the suction and discharge of the liquid, the reliable work of the elastic diaphragm is realized, and the reliable work of the diaphragm pump is realized.

5. According to the invention, the elastic separation blade is arranged, so that liquid is prevented from entering between the elastic diaphragm and the second limiting plate by the elastic separation blade, the granular substances are prevented from existing between the elastic diaphragm and the second limiting plate, the elastic diaphragm is prevented from being burst by the granular substances when the elastic diaphragm and the second limiting plate are tightly attached, the probability of damage of the elastic diaphragm is further reduced, the elastic diaphragm is prevented from being damaged to influence the suction and discharge of the liquid, the reliable work of the elastic diaphragm is further realized, and the reliable work of the diaphragm pump is further realized.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic view showing the overall construction of a diaphragm pump according to the present invention;

FIG. 2 is a schematic view showing an internal structure of a diaphragm pump according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic view of the worm gear and worm of the present invention;

FIG. 5 is a schematic view of the structure of the elastic baffle of the present invention;

FIG. 6 is a partial enlarged view at B in FIG. 5;

FIG. 7 is a schematic view showing an internal structure of a rotating sleeve according to the present invention;

in the figure: the pump body 1, a liquid discharge cavity 11, a liquid inlet cavity 12, a liquid transfusion cavity 13, a one-way valve 14, a liquid storage cavity 15, a power mechanism 2, a moving shaft 22, a key groove 221, a worm wheel 23, a worm 24, a first motor 25, a first belt 251, an elastic diaphragm 3, a first limit plate 31, a second limit plate 32, a flow guide groove 321, an elastic baffle 33, a rotating sleeve 4, a guide groove 41, a first spiral groove 411, a second spiral groove 412, a guide rod 5, a bearing bush 51, an elastic part 6, a spring 61, a positioning column 62, an arc structure 621, a tapered roller bearing 7, a baffle 8 and a bulge structure 81.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 4, a continuous diaphragm pump based on positive and negative screw drive comprises a pump body 1; a first mounting groove is formed in the middle of the pump body 1; a liquid discharge cavity 11 is arranged at the upper end of the pump body 1; the lower end of the pump body 1 is provided with a liquid inlet cavity 12; two ends of the pump body 1 are symmetrically provided with transfusion cavities 13; the upper end of the transfusion cavity 13 is communicated with the liquid discharge cavity 11; the lower end of the transfusion cavity 13 is communicated with the liquid inlet cavity 12; the upper end and the lower end of the transfusion cavity 13 are respectively provided with a one-way valve 14; the one-way valve 14 is used for realizing the closing and opening of the upper end and the lower end of the transfusion cavity 13; a liquid storage cavity 15 is arranged between the transfusion cavity 13 and the first mounting groove; the method is characterized in that: the diaphragm pump also comprises a power mechanism 2 and an elastic diaphragm 3; the power mechanism 2 comprises a rotating sleeve 4, a moving shaft 22, a worm wheel 23, a worm 24 and a first motor 25; the first mounting groove is internally provided with the rotating sleeve 4; the rotating sleeve 4 is rotationally connected with the pump body 1; the inner wall of the rotating sleeve 4 is provided with a guide groove 41; the guide groove 41 comprises a first spiral groove 411 and a second spiral groove 412; the first spiral groove 411 and the second spiral groove 412 are symmetrically arranged on the inner wall of the rotating sleeve 4; the spiral direction of the first spiral groove 411 is opposite to the spiral direction of the second spiral groove 412; one end of the first spiral groove 411 is communicated with one end of the second spiral groove 412; the other end of the first spiral groove 411 is communicated with the other end of the second spiral groove 412; the moving shaft 22 passes through the rotating sleeve 4; the moving shaft 22 is in clearance fit with the rotating sleeve 4; the moving shaft 22 is connected with the pump body 1 in a sliding way; the middle part of the moving shaft 22 is provided with a guide rod 5; one end of the guide rod 5 is connected with the moving shaft 22; the other end of the guide rod 5 is clamped in the guide groove 41; the elastic diaphragms 3 are symmetrically arranged at two ends of the moving shaft 22; the edge of the elastic diaphragm 3 is fixedly connected with the pump body 1; the middle part of the elastic diaphragm 3 is fixedly connected with the moving shaft 22; the worm wheel 23 is arranged on the rotating sleeve 4; the worm wheel 23 is fixedly connected with the rotating sleeve 4; the worm 24 is arranged on the pump body 1; the worm 24 is rotationally connected with the pump body 1; the worm 24 is meshed with the worm wheel 23; the first motor 25 is arranged on the pump body 1; the first motor 25 is fixedly connected with the pump body 1; the rotating shaft of the first motor 25 and the worm 24 are driven through a first belt 251.

When the device works, the diaphragm pump is fixed near the liquid to be conveyed, the liquid inlet cavity 12 is connected with the liquid by using a pipeline, the first motor 25 rotates, the first belt 251 drives the worm 24 to rotate, the worm wheel 23 is further driven to rotate, the rotating sleeve 4 is further driven to rotate, the side wall of the first spiral groove 411 in the rotating sleeve 4 generates thrust on the side wall of the guide rod 5, the first spiral groove 411 drives the moving shaft 22 to move towards one end of the pump body 1 through the guide rod 5 because the moving shaft 22 is in sliding connection with the pump body 1, and further two elastic diaphragms 3 are deformed, one elastic diaphragm 3 is deformed towards one side of one transfusion cavity 13, so that the volume between the elastic diaphragm 3 and the transfusion cavity 13 is reduced, the pressure of the liquid in the liquid storage cavity 15 at the side is increased, and the liquid in the liquid storage cavity 15 flows towards the liquid discharge cavity 11 and the liquid inlet cavity 12 respectively through the upper end and the lower end of the transfusion cavity 13, further opening the one-way valve 14 at the upper end of the transfusion cavity 13, closing the one-way valve 14 below the transfusion cavity 13, further making the liquid in the liquid storage cavity 15 enter the liquid discharge cavity 11 through the one-way valve 14 at the upper end of the transfusion cavity 13, further discharging the liquid in the liquid storage cavity 15 out of the pump body 1 through the liquid discharge cavity 11, wherein while one elastic diaphragm 3 deforms toward one side of the transfusion cavity 13, the other elastic diaphragm 3 deforms toward one side of the mounting groove, further increasing the volume between the elastic diaphragm 3 and the transfusion cavity 13, further reducing the pressure of the liquid in the liquid storage cavity 15, further making the liquid in the liquid discharge cavity 11 and the liquid inlet cavity 12 respectively flow into the transfusion cavity 13 through the one-way valves 14 at the upper end and the lower end of the transfusion cavity 13, further making the one-way valve 14 at the upper end of the transfusion cavity 13 closed, simultaneously opening the one-way valve 14 below the transfusion cavity 13, further sucking the liquid in the liquid inlet cavity 12 into the transfusion cavity 13 through the one-way valve 14 at the lower end of the transfusion cavity 13, then the liquid enters the liquid storage cavity 15, when the moving shaft 22 moves to the maximum displacement, the guide rod 5 enters the second spiral groove 412 from the first spiral groove 411, and because the spiral direction of the first spiral groove 411 is opposite to that of the second spiral groove 412, the side wall of the second spiral groove 412 generates reverse thrust to the guide rod 5, and then the second spiral groove 412 drives the moving shaft 22 to move in the reverse direction through the guide rod 5, so that the liquid storage cavity 15 for discharging the liquid is refilled with the liquid, and meanwhile, the liquid in the liquid storage cavity 15 filled with the liquid is discharged out of the pump body 1 through the liquid discharge cavity 11, and the above circulation is repeated, so that the continuous conveying of the liquid is realized; most of the existing electric diaphragm pumps drive the diaphragm to move back and forth through the slider-crank mechanism, so that the volume of the working chamber changes alternately, thereby continuously sucking and discharging liquid, because of the characteristics of the structure of the slider-crank mechanism, the volume of the double-diaphragm pump is larger, the structure is complex, the processing cost is high, and the diaphragm pump is under the combined action of the guide groove 41 and the guide rod 5, the rotation of the rotating sleeve 4 is converted into the reciprocating linear movement of the moving shaft 22, and further the liquid is continuously sucked and discharged through the realization, the diaphragm occupies a smaller space, the structure is simple, the processing difficulty is low, and the cost is low.

As shown in fig. 3 and 6, a second mounting groove is formed at the joint of the moving shaft 22 and the guide rod 5; a bearing bush 51 is arranged in the second mounting groove; the bearing bush 51 is clamped in the second mounting groove; the guide rod 5 is arranged in the bearing bush 51; the guide rod 5 is rotatably connected with the bearing bush 51; the diameter of the guide rod 5 is smaller than the opening width of the guide groove 41.

Through the rotation connection of guide bar 5 and axle bush 51, and then guide bar 5 can rotate, and then guide bar 5 can roll on the lateral wall of guide way 41, and then avoid guide bar 5 to slide on the lateral wall of guide way 41, and then reduce the frictional force between guide bar 5 and the guide way 41, and then reduce the wearing and tearing of guide bar 5 and guide way 41, and then guarantee the cooperation precision of guide bar 5 and guide way 41, and then realize the reliable work of removal axle 22, and then realize the reliable work of diaphragm pump.

As shown in fig. 3 and 6, a first limit plate 31 is arranged on one side of the elastic diaphragm 3 close to the guide rod 5; the first limiting plate 31 is fixedly connected with the moving shaft 22; a second limiting plate 32 is arranged on the other side of the elastic diaphragm 3; the second limiting plate 32 is fixedly connected with the moving shaft 22.

By arranging the first limiting plate 31, when the moving shaft 22 drives the elastic diaphragm 3 to deform towards one side of the infusion cavity 13, the elastic diaphragm 3 is attached to the side surface of the first limiting plate 31, so that the maximum bending angle of the elastic diaphragm 3 is reduced, the elastic diaphragm 3 is prevented from being damaged due to overlarge bending, the probability of damage of the elastic diaphragm 3 is reduced, the elastic diaphragm 3 is prevented from being damaged to influence the suction and discharge of liquid, the reliable work of the elastic diaphragm 3 is realized, and the reliable work of the diaphragm pump is realized; through setting up No. two limiting plates 32, when removal axle 22 drives elastic diaphragm 3 and warp towards mounting groove one side, elastic diaphragm 3 laminates on No. two limiting plates 32's side, and then reduces elastic diaphragm 3's the biggest angle of buckling, and then prevents that elastic diaphragm 3 from producing the damage because of buckling too big, and then reduces elastic diaphragm 3 damaged probability, and then prevents that elastic diaphragm 3 from damaging the suction and the discharge that influence liquid, and then realizes elastic diaphragm 3's reliable work, and then realizes the reliable work of diaphragm pump.

As a first embodiment of the present invention, as shown in fig. 3, two second limiting plates 32 are provided with diversion trenches 321; the flow guide grooves 321 are uniformly spaced.

Through set up guiding gutter 321 on No. two limiting plates 32, when removal axle 22 drives elastic diaphragm 3 and warp towards mounting groove one side, the distance of elastic diaphragm 3 and No. two limiting plates 32 side reduces, and then make the liquid between elastic diaphragm 3 and No. two limiting plates 32 flow out through guiding gutter 321, and then the liquid takes away the particulate matter between elastic diaphragm 3 and No. two limiting plates 32, and then reduce the probability that there is the granule between elastic diaphragm 3 and No. two limiting plates 32, and then reduce the probability that particulate matter breaks elastic diaphragm 3 when elastic diaphragm 3 and No. two limiting plates 32 paste tightly, and then reduce the probability that elastic diaphragm 3 damaged, and then prevent that elastic diaphragm 3 from damaging the suction and the discharge that influence liquid, and then realize elastic diaphragm 3's reliable work, and then realize the reliable work of diaphragm pump.

As a second embodiment of the present invention, as shown in fig. 6, two of the second limiting plates 32 are provided with an elastic stop piece 33; the elastic baffle piece 33 is in a ring shape; the edge of the elastic baffle piece 33 is fixedly connected with the pump body 1; the middle part of the elastic baffle piece 33 is fixedly connected with the edge of the second limit plate 32.

Through setting up elasticity separation blade 33, and then elasticity separation blade 33 prevents that liquid from getting into between elastic diaphragm 3 and No. two limiting plates 32, and then avoid having granular material between elastic diaphragm 3 and No. two limiting plates 32, and then granular material breaks elastic diaphragm 3 when preventing elastic diaphragm 3 and No. two limiting plates 32 from pasting tightly, and then reduce the probability that elastic diaphragm 3 damaged, and then prevent that elastic diaphragm 3 from damaging the suction and the discharge that influence liquid, and then realize elastic diaphragm 3's reliable work, and then realize the reliable work of diaphragm pump.

As shown in fig. 3 and 6, the two second limiting plates 32 are provided with an elastic element 6 on the sides away from each other; the elastic piece 6 is fixedly connected with the second limit plate 32.

Through set up elastic component 6 in the side of No. two limiting plates 32, before removal axle 22 moved the maximum displacement, elastic component 6 was contradicted earlier on the lateral wall of transfusion cavity 13, and then make elastic component 6 produce elasticity, when removal axle 22 moved the maximum displacement, the elasticity of elastic component 6 reached the biggest, and then elasticity promotes removal axle 22 toward reverse direction removal, and then make guide bar 5 automatic get into No. two helicla flutes 412 from a helicla flute 411 in, and then avoid the lateral wall of a helicla flute 411 tip to cause the striking to guide bar 5, and then prevent that guide bar 5 from receiving the damage because of the striking, and then reduce the probability that guide bar 5 damaged, and then realize the reliable work of guide bar 5, and then realize the reliable removal of removal axle 22, and then realize the reliable work of diaphragm pump.

As shown in fig. 3 and 6, the elastic member 6 is a spring 61; one end of the spring 61 is fixedly connected with the second limit plate 32; the other end of the spring 61 is provided with a positioning column 62; one end of the positioning column 62 is fixedly connected with the spring 61; the other end of the positioning column 62 is provided with an arc structure 621; the arc structure 621 is matched with the side wall of the infusion cavity 13.

By arranging the arc structure 621, when the arc structure 621 abuts against the side wall of the infusion cavity 13, the side wall of the infusion cavity 13 automatically guides the arc structure 621, so as to automatically guide the spring 61, further, the axis of the spring 61 is aligned with the axis of the moving shaft 22, further, the probability that the spring 61 is bent due to liquid impact is reduced, further, the spring 61 is prevented from being bent, the elastic force of the spring 61 is reduced, further, the elastic force of the spring 61 can push the moving shaft 22 to move reversely, further, the guide rod 5 automatically enters the second spiral groove 412 from the first spiral groove 411, further, the side wall at the end part of the first spiral groove 411 is prevented from impacting the guide rod 5, further, the guide rod 5 is prevented from being damaged due to impact, further, the probability that the guide rod 5 is damaged is reduced, further, the reliable work of the guide rod 5 is realized, and further, the reliable movement of the moving shaft 22 is realized, thereby realizing reliable work of the diaphragm pump.

As shown in fig. 3 and 6, tapered roller bearings 7 are symmetrically arranged at two ends of the rotating sleeve 4; the outer ring of the tapered roller bearing 7 is fixedly connected with the pump body 1; the inner ring of the tapered roller bearing 7 is fixedly connected with the rotating sleeve 4; two ends of the rotating sleeve 4 are symmetrically provided with baffle plates 8; the two baffles 8 are arranged on two sides of the two tapered roller bearings 7; the baffle 8 is fixedly connected with the pump body 1; the baffle plate 8 passes through the moving shaft 22; key grooves 221 are symmetrically formed at two ends of the moving shaft 22; a raised structure 81 is arranged at the position of the baffle plate 8 corresponding to the key groove 221; the protrusion 81 is engaged in the key groove 221.

Through set up tapered roller bearing 7 at the both ends of rotating cover 4, and then realize rotating the rotation of cover 4, tapered roller bearing 7 can resist axial thrust simultaneously, and then prevents to rotate cover 4 and produce axial displacement under the effect of guide bar 5 reaction force, and then realizes moving the reliable removal of axle 22, and then realizes the reliable work of diaphragm pump.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A continuous diaphragm pump based on positive and negative screw transmission comprises a pump body (1); a first mounting groove is formed in the middle of the pump body (1); a liquid discharge cavity (11) is arranged at the upper end of the pump body (1); the lower end of the pump body (1) is provided with a liquid inlet cavity (12); two ends of the pump body (1) are symmetrically provided with transfusion cavities (13); the upper end of the transfusion cavity (13) is communicated with the liquid discharge cavity (11); the lower end of the transfusion cavity (13) is communicated with the liquid inlet cavity (12); the upper end and the lower end of the transfusion cavity (13) are respectively provided with a one-way valve (14); the one-way valve (14) is used for realizing the closing and opening of the upper end and the lower end of the transfusion cavity (13); a liquid storage cavity (15) is arranged between the transfusion cavity (13) and the first mounting groove; the method is characterized in that: the diaphragm pump also comprises a power mechanism (2) and an elastic diaphragm (3); the power mechanism (2) comprises a rotating sleeve (4), a moving shaft (22), a worm wheel (23), a worm (24) and a first motor (25); the first mounting groove is internally provided with the rotating sleeve (4); the rotating sleeve (4) is rotationally connected with the pump body (1); a guide groove (41) is formed in the inner wall of the rotating sleeve (4); the guide groove (41) comprises a first spiral groove (411) and a second spiral groove (412); the inner wall of the rotating sleeve (4) is symmetrically provided with the first spiral groove (411) and the second spiral groove (412); the spiral direction of the first spiral groove (411) is opposite to that of the second spiral groove (412); one end of the first spiral groove (411) is communicated with one end of the second spiral groove (412); the other end of the first spiral groove (411) is communicated with the other end of the second spiral groove (412); the rotating sleeve (4) penetrates through the moving shaft (22); the moving shaft (22) is in clearance fit with the rotating sleeve (4); the moving shaft (22) is connected with the pump body (1) in a sliding way; a guide rod (5) is arranged in the middle of the moving shaft (22); one end of the guide rod (5) is connected with the moving shaft (22); the other end of the guide rod (5) is clamped in the guide groove (41); the two ends of the moving shaft (22) are symmetrically provided with the elastic diaphragms (3); the edge of the elastic diaphragm (3) is fixedly connected with the pump body (1); the middle part of the elastic diaphragm (3) is fixedly connected with the moving shaft (22); the worm wheel (23) is arranged on the rotating sleeve (4); the worm wheel (23) is fixedly connected with the rotating sleeve (4); the pump body (1) is provided with the worm (24); the worm (24) is rotationally connected with the pump body (1); the worm (24) is meshed with the worm wheel (23); the first motor (25) is arranged on the pump body (1); the first motor (25) is fixedly connected with the pump body (1); the rotating shaft of the first motor (25) is in transmission with the worm (24) through a first belt (251).

2. A positive and negative screw drive based continuous diaphragm pump according to claim 1 wherein: a second mounting groove is formed in the joint of the moving shaft (22) and the guide rod (5); a bearing bush (51) is arranged in the second mounting groove; the bearing bush (51) is clamped in the second mounting groove; the guide rod (5) is arranged in the bearing bush (51); the guide rod (5) is rotatably connected with the bearing bush (51); the diameter of the guide rod (5) is smaller than the opening width of the guide groove (41).

3. A positive and negative screw drive based continuous diaphragm pump according to claim 2, wherein: one side of the elastic diaphragm (3) close to the guide rod (5) is provided with a first limiting plate (31); the first limiting plate (31) is fixedly connected with the moving shaft (22); a second limiting plate (32) is arranged on the other side of the elastic diaphragm (3); the second limiting plate (32) is fixedly connected with the moving shaft (22).

4. A positive and negative screw drive based continuous diaphragm pump according to claim 3, wherein: flow guide grooves (321) are formed in the two second limiting plates (32); the flow guide grooves (321) are uniformly arranged at intervals.

5. A positive and negative screw drive based continuous diaphragm pump according to claim 3, wherein: elastic blocking pieces (33) are arranged on the two second limiting plates (32); the elastic baffle sheet (33) is in a ring shape; the edge of the elastic baffle piece (33) is fixedly connected with the pump body (1); the middle part of the elastic baffle sheet (33) is fixedly connected with the edge of the second limiting plate (32).

6. A positive and negative screw drive based continuous diaphragm pump according to claim 4 or 5, wherein: elastic pieces (6) are arranged on the sides, far away from each other, of the two second limiting plates (32); the elastic piece (6) is fixedly connected with the second limiting plate (32).

7. A positive and negative screw drive based continuous diaphragm pump according to claim 6, wherein: the elastic piece (6) is a spring (61); one end of the spring (61) is fixedly connected with the second limiting plate (32); the other end of the spring (61) is provided with a positioning column (62); one end of the positioning column (62) is fixedly connected with the spring (61); the other end of the positioning column (62) is provided with an arc structure (621); the arc structure (621) is inosculated with the side wall of the transfusion cavity (13).

8. A positive and negative screw drive based continuous diaphragm pump according to claim 7, wherein: tapered roller bearings (7) are symmetrically arranged at two ends of the rotating sleeve (4); the outer ring of the tapered roller bearing (7) is fixedly connected with the pump body (1); the inner ring of the tapered roller bearing (7) is fixedly connected with the rotating sleeve (4); two ends of the rotating sleeve (4) are symmetrically provided with baffle plates (8); the two baffles (8) are arranged on two sides of the two tapered roller bearings (7); the baffle (8) is fixedly connected with the pump body (1); the baffle (8) penetrates through the moving shaft (22); key grooves (221) are symmetrically formed in two ends of the moving shaft (22); a raised structure (81) is arranged at the position of the baffle (8) corresponding to the key groove (221); the protruding structure (81) is clamped in the key groove (221).