CN220646148U - Miniature four-cavity diaphragm pump - Google Patents

Abstract

The utility model discloses a miniature four-cavity diaphragm pump, which relates to the technical field of water pumps and has the technical scheme that: the utility model discloses a miniature four-cavity diaphragm pump which comprises a pump cover, a water inlet and outlet valve seat, a diaphragm insert, a pressure bearing seat, a bearing sleeve, a bearing, an eccentric, an adjusting gasket, a motor front cover, a motor casing and a fan blade. The water inlet and outlet valve is arranged on the water inlet and outlet valve seat; the diaphragm insert is inlaid into a piston block of the diaphragm during injection molding; eccentrically mounted to the bearing; the bearing is mounted on the bearing sleeve; the diaphragm insert on the diaphragm passes through the positioning hole of the pressure-bearing seat, and is put into the piston push rod of the bearing sleeve; the fan blade is mounted to the tail of the motor shaft. The diaphragm design of the utility model avoids the problems of water leakage and pressure reduction caused by various reasons of the original diaphragm; meanwhile, the fan blades are added to radiate heat of the motor, the bearing and the diaphragm, the temperatures of the motor, the bearing and the diaphragm are reduced, and the efficiency and the service life of the diaphragm pump are improved.

Description

Miniature four-cavity diaphragm pump

Technical Field

The utility model relates to the technical field of water pumps, in particular to a miniature four-cavity diaphragm pump.

Background

At present, along with the development of scientific technology, in the technical field of agriculture and forestry, the performance requirement of a user on a diaphragm pump is increasingly improved, and the three-cavity diaphragm pump in the prior art is characterized by high working pressure of the diaphragm pump and good atomization effect. The utility model has the advantages of its shortcoming is that the power is big, and the flow is little, and it is not good to use in the field that requires great to the flow, and to this shortcoming, market has promoted disjunctor double pump, and two micropumps work simultaneously, through the mode of establishing ties, and the last pump is from the last pump water sucking compression of pumping out. Its advantages are low power of two micropumps, low cost, and high efficiency. The two micro pumps work simultaneously, the coordination is poor, the heat dissipation effect is poor, the latter pump is always in a compressed state, and the motor is easy to excessively generate heat and burn. The motor does not dissipate heat, the working heat of the bearing is transferred to the diaphragm, and the diaphragm is more easily subjected to permanent deformation at high temperature, so that the diaphragm is damaged.

At present, two fixing modes are adopted for the diaphragm of the diaphragm pump at home and abroad. The first type of membrane is an integral membrane with inverted tooth type fixed posts. And (3) smearing lubricant on the inverted teeth, and then directly installing the inverted tooth-shaped fixing column on a piston push rod of the bearing sleeve through a hydraulic machine or a piston block for knocking the diaphragm, and fixing through the inverted teeth of the fixing column. When the diaphragm pump works, because the eccentric rotation has a certain inclination angle, the piston push rod of the bearing sleeve and the piston block of the diaphragm vibrate up and down together, and meanwhile, the diaphragm pump swings left and right in a small amplitude. The diaphragm material has certain hardness, is shore 80A generally, so the inverted tooth-shaped fixed column of piston push rod and diaphragm can have relative displacement, and the fixed clearance of the inverted tooth-shaped fixed column of diaphragm and the piston push rod of bearing housing can increase gradually after long-term work, leads to the compression relative stroke of diaphragm to shorten, leads to diaphragm pump pressure reduction. The second type of diaphragm is a split diaphragm, which is fixed to the piston rod of the bearing housing by screws passing through the piston blocks. The seal between the diaphragm and the bearing housing is formed by co-extruding the diaphragm with the piston rod of the bearing housing and the piston block. When the diaphragm pump starts to work, the piston block and the piston push rod of the bearing vibrate up and down at a high speed, the screw loosens to cause insufficient extrusion force of the piston block and the piston push rod, and water leakage between the diaphragm and the bearing sleeve occurs. When the diaphragm reacts with corrosive solvents, after the diaphragm contracts due to swelling reaction, the tightness of the piston block and the piston push rod is insufficient, high-pressure liquid enters from screw holes of the piston block and flows out from between the diaphragm and the bearing sleeve to cause water leakage, so that the bearing is rusted and blocked, and the motor is burnt.

The power parts of the three-cavity diaphragm pump and the double pump in the current market are not provided with cooling fans, the motor, the bearing and the diaphragm have poor cooling effect, the diaphragm works for a long time, the water sucking capacity of the diaphragm pump is easy to be reduced, the pressure is reduced, and the motor is burnt out due to excessive heating.

Disclosure of Invention

Aiming at the existing technical problems, the utility model provides a miniature four-cavity diaphragm pump, wherein a heat dissipation fan blade is added at the tail part of a motor, an air inlet is arranged at the axial part of a motor front cover, and an air outlet is arranged at the bottom. The motor works to drive the fan blades to rotate, wind power is generated to pass through the motor and then enters through the air inlet of the motor front cover, the wind power is directly blown onto the bearing and the diaphragm, and the wind power is blown out from the air outlet of the motor front cover, so that heat dissipation and cooling are simultaneously carried out on the surface of the motor, the bearing and the diaphragm. The utility model adopts a diaphragm insert of PP (glass fiber reinforced polypropylene) to be embedded in a piston block of the diaphragm, and forms an integral part with the diaphragm. The diaphragm is provided with a buffer curved surface. The utility model uses high-strength high-temperature nylon to replace the aluminum alloy injection bearing sleeve. The utility model replaces the TPV water inlet and outlet valve with the rubber water inlet and outlet valve.

In order to solve the prior art problems, the utility model adopts the following technical scheme:

the intelligent pressure switch comprises an intelligent pressure switch assembly, a pump cover, an O-shaped ring, a water inlet and outlet valve seat, a diaphragm insert, a pressure bearing seat, a bearing sleeve, a bearing, an eccentric part, an adjusting gasket, a motor front cover, a motor shell, a fan blade, a fan cover and a shock pad from top to bottom. The intelligent pressure switch assembly is mounted on the pump cover; the O-shaped ring is mounted on the pump cover; the water inlet and outlet valve is mounted on the water inlet and outlet valve seat; the diaphragm insert is embedded into a piston block of the diaphragm during injection molding; the eccentric is mounted to a bearing; the bearing is mounted on the bearing sleeve; the diaphragm insert penetrates through the positioning hole of the pressure-bearing seat, and is placed into the piston push rod of the bearing sleeve, and the back surface of the piston push rod of the bearing sleeve is fixed by a screw; the motor passes through the motor front cover positioning hole and is fixed by a screw; the adjusting gasket is arranged at the center of the motor shaft; the motor shell is mounted on the motor front cover; the fan blade is mounted at the tail part of the motor shaft; the fan housing is mounted to the motor casing; the shock pad is mounted to the motor housing.

Further, the upper side of the diaphragm is provided with 4 working chambers;

further, the diaphragm insert is made of glass fiber reinforced polypropylene.

Further, when the diaphragm is injection molded, the diaphragm insert is embedded into the piston block of the diaphragm, the diaphragm is made of thermoplastic elastomer, the material contains PP components, the injection molding temperature is close to that of the diaphragm insert, and therefore after the diaphragm is injection molded, the diaphragm and the connecting part of the diaphragm insert are fused into an integral seal; the diaphragm is provided with a buffer curved surface.

Further, a screw rod of the diaphragm insert is installed into the piston push rod of the bearing sleeve through a positioning hole of the pressure-bearing seat, and is fixed from the back surface of the piston push rod of the bearing sleeve by a screw.

Further, the material of the bearing sleeve is nylon glass fiber reinforced.

Furthermore, the tail of the motor shaft is provided with independent radiating fan blades.

Further, the bottom and the side of the motor front cover are provided with ventilation holes.

In summary, compared with the prior art, the utility model has the following beneficial effects:

the utility model designs an integral heat dissipation system, a fan blade is added at the tail part of a motor shaft, and an air inlet and an air outlet are arranged on a motor front cover. The motor during operation drives the fan blade and rotates, and the fan blade produces wind-force and passes behind the motor surface and enter into the drive chamber through the air intake of motor protecgulum, blows out by the air outlet of motor protecgulum, dispels the heat to motor, bearing and diaphragm, makes the motor can not produce high temperature, can not burn the motor, very big extension motor life, dispel the heat to bearing surface simultaneously, reduced the bearing because of the wearing and tearing that high temperature produced and dispel the heat to the diaphragm, reduced the buffering curved surface of diaphragm because of the deformation increase that high temperature produced. According to the utility model, the PP diaphragm insert and the TPV diaphragm are integrally molded into the diaphragm assembly, so that the diaphragm sealing part is relatively independent of the screw connection fixing parts of the diaphragm insert and the bearing sleeve, the looseness of the screw cannot be influenced when the diaphragm works, and the connecting parts of the diaphragm insert and the diaphragm are mutually fused, so that a better sealing effect can be achieved. The original material of the bearing sleeve is changed from an aluminum alloy material to a high-strength high-temperature nylon material. The diaphragm pump working bearing can rub to generate high temperature, the high temperature is conducted to the diaphragm through aluminum alloy, and the diaphragm is accelerated to be permanently deformed at high temperature, so that the service life of the diaphragm is influenced. The poor temperature of nylon material heat conductivity can not conduct the heat to the diaphragm, effectively prolongs the life-span of diaphragm. The buffer curved surface is arranged on the diaphragm, so that the tensile deformation resistance of the material of the piston block of the diaphragm during up-and-down vibration can be effectively reduced, and the working power is greatly reduced. The utility model saves 20% of power relative to double pumps under the same flow and pressure, greatly improves the energy efficiency, provides high-efficiency products for the fields of water treatment, agricultural irrigation, car washing and the like, and has very broad market prospect.

Drawings

FIG. 1 is an exploded view of a miniature four-chamber diaphragm pump of the present utility model;

FIG. 2 is a cross-sectional view of a diaphragm assembly of the present utility model;

FIG. 3 is a cross-sectional view of a diaphragm assembly of the present utility model;

FIG. 4 is a cross-sectional view of the diaphragm assembly in an operative condition of the present utility model;

FIG. 5 shows a pressure seat according to the present utility model;

FIG. 6 is a bearing housing of the present utility model;

FIG. 7 is a cross-sectional view of the inlet and outlet valve assembly of the present utility model;

FIG. 8 is a front motor cover of the present utility model;

FIG. 9 is a schematic diagram of the overall heat dissipation of the fan blade of the present utility model;

FIG. 10 is a diagram of a pump cap assembly of the present utility model;

FIG. 11 is a view of the inlet and outlet valve assembly of the present utility model;

FIG. 12 is a bearing housing assembly view;

FIG. 13 is a diagram of a diaphragm assembly;

FIG. 14 is a powertrain diagram;

fig. 15 is a product assembly diagram.

Reference numerals: 1. the intelligent pressure switch assembly comprises 2 parts of a pump cover, 3 parts of an O-shaped ring, 4 parts of an inlet and outlet valve, 5 parts of an inlet and outlet valve, 6 parts of a diaphragm, 7 parts of a diaphragm insert, 8 parts of a pressure-bearing seat, 9 parts of a bearing sleeve, 10 parts of a bearing, 11 parts of a eccentric part, 12 parts of an adjusting gasket, 13 parts of a motor front cover, 14 parts of a motor, 15 parts of a motor, 16 parts of a motor housing, 17 parts of a fan blade, 18 parts of a fan housing, a shock pad, 401 parts of a sealing surface of the inlet and outlet valve, 601 parts of a diaphragm water inlet sealing line, 602 parts of a diaphragm piston block, 603 parts of a buffering curved surface of the diaphragm, 604 parts of a contact surface of the diaphragm and the diaphragm insert, 605 parts of a wading surface of the diaphragm, 701 parts of the diaphragm insert, a screw rod of the diaphragm insert, 702 parts of the diaphragm connecting contact surface of the diaphragm, 801 parts of the positioning hole of the pressure-bearing seat, 802 parts of the pressure-bearing seat, reinforcing ribs of the pressure-bearing seat, 901 parts of the piston push rod of the bearing sleeve, 902 parts of the piston push rod of the bearing sleeve, concave parts of the piston push rod of the bearing sleeve, 903 parts of the piston push rod connecting the bearing sleeve, the mounting grooves of the bearing sleeve, 1301 parts of the mounting grooves of the motor front cover, the air inlet of the motor front cover, 1302 and the air outlet of the motor front cover.

Detailed Description

The utility model is further described below with reference to the drawings and detailed description.

Referring to fig. 2, the present utility model adopts a scheme that a glass fiber reinforced PP (polypropylene) diaphragm insert 7 and a TPV diaphragm 6 are integrally injection molded to form a diaphragm assembly. Because of the working principle of the diaphragm pump, the diaphragm vibrates up and down, so the diaphragm is made of soft plastic, namely thermoplastic elastomer TPV. The piston push rod of the bearing sleeve cannot be fixed on the diaphragm by singly using soft plastic, so the utility model is designed with a diaphragm insert made of PP glass fiber reinforced material, and the PP glass fiber reinforced material has certain strength and can fix screws. The diaphragm is made of TPV, and the diaphragm contains a certain proportion of PP components, so that the diaphragm insert 7 and the diaphragm connecting part 604 can be fused into a whole in the injection molding process of the diaphragm, and a very good sealing effect is achieved. The buffer area surface 603 is arranged on the diaphragm, so that deformation resistance of the diaphragm can be effectively reduced when the piston block 602 vibrates up and down during working.

Referring to fig. 3, a screw 701 of a diaphragm insert on the diaphragm passes through a positioning hole 801 of the pressure-bearing seat 8, and is mounted on a piston push rod 901 of the bearing housing 9, and a screw passes through a screw hole at the bottom of the piston push rod of the bearing housing to fix the bearing housing and the diaphragm, thereby forming a diaphragm assembly. Because the wading surface 605 on the front surface of the diaphragm on the diaphragm assembly is in a completely fused sealing state at the joint of the diaphragm and the diaphragm insert during injection molding, the problem of water leakage cannot occur. The diaphragm and the bearing bush are fixed by screws, so that gaps are not generated due to up-and-down vibration of the diaphragm, and the problem that the pressure is reduced and water cannot be sucked is avoided.

Referring to fig. 4, the piston block 602 of the diaphragm is designed with a slope that matches the eccentricity angle. When the piston cavity at one side is in a compression state, the piston block 602 of the diaphragm can be sufficiently close to the sealing surface 401 of the water inlet valve 4, so that the water discharge is effectively improved; meanwhile, the symmetrical piston cavities at the other side are in a water absorption state, and the piston blocks 602 of the inclined diaphragm are increased to be far away from the sealing surface 401 of the water inlet valve 4, so that the piston space can be increased, and the water absorption capacity can be improved; the piston block of the diaphragm is designed with inclination, so that the suction lift and the lift can be simultaneously improved.

Referring to fig. 5, the back of the bearing seat 8 is provided with reinforcing ribs 802 to improve the supporting capability of the bearing seat.

Referring to fig. 6, the material of the bearing sleeve 9 is changed from aluminum alloy material to high-strength nylon material, and the nylon is a heat insulation material, so that the heat generated by the working bearing of the diaphragm pump is not conducted to the buffer curved surface 603 of the diaphragm through the piston push rod 901 of the bearing sleeve, and the service life of the diaphragm is not influenced; the grooves 902 are additionally formed at the connecting positions of the piston push rods of the bearing sleeves, so that the bearing sleeves can be prevented from touching the reinforcing ribs on the back of the pressure-bearing seat in the working process.

Referring to fig. 7, the material of the water inlet and outlet valve is changed from TPV material to natural rubber material, which has the advantages of good rebound performance, and small deformation of the sealing surface 401 of the water inlet and outlet valve after long-term operation. The water inlet and outlet valve made of TPV material is soft plastic, and has large deformation after long-term operation, so that the valve is closed, water cannot be sucked, and the pressure is reduced.

Referring to fig. 8, the motor front cover 13 of the present utility model has an air inlet 1301 in the direction of the motor shaft and an air outlet 1302 at the bottom, so that wind power can enter the transmission chamber to dissipate heat from the bearing and the diaphragm;

referring to fig. 9, a fan blade 16 is added at the tail of a motor shaft, and is driven to rotate when the motor works, wind power passes through an air inlet 1301 of a motor front cover from the surface of the motor, enters a transmission chamber, simultaneously dissipates heat of the motor, a bearing and a diaphragm, and is blown out from an air outlet 1302; the heat dissipation can reduce the abrasion of the bearing caused by high temperature, reduce the increase of the deformation of the buffer curved surface of the diaphragm caused by high temperature, and simultaneously reduce the damage of the motor caused by high temperature.

The specific installation method comprises the following steps:

the intelligent pressure switch assembly is mounted to the pump cap and the O-ring is placed into the O-ring groove of the pump cap to form a first composite component, as shown in fig. 10.

The water inlet and outlet valve is installed on the water inlet and outlet valve seat through the positioning hole of the water inlet and outlet valve seat, and the redundant part is cut off to form a second combined part, as shown in figure 11.

Mounting the eccentric to the inner hole of the bearing; the installed bearing assembly is mounted to the bearing housing to form a third composite part, as shown in fig. 12.

The diaphragm insert on the diaphragm is installed in the installation groove of the piston push rod of the bearing sleeve of the third combined part through the positioning hole of the pressure-bearing seat, and the self-tapping screw penetrates through the bottom of the piston push rod of the bearing sleeve to fix the diaphragm insert, so that the fourth combined part is formed, as shown in fig. 13.

The motor is installed on the motor front cover through the positioning hole of the motor front cover, the motor shell is installed on the motor front cover, then the fan blade is installed on the tail part of the motor shaft, the fan cover is covered, the shock pad is installed, and a fifth combined part is formed, as shown in fig. 14.

The adjusting gasket is installed on the motor through the motor shaft of the fifth combination part, the eccentric in the fourth combination part is installed on the motor front cover through the motor shaft, then the second combination part is installed on the diaphragm of the fourth combination part, the first combination part is covered, and the first assembly, the fourth assembly and the fifth assembly are fixed through screws, so that the assembly is completed. As shown in fig. 15.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A miniature four-chamber diaphragm pump, characterized in that: the intelligent pressure switch assembly comprises an intelligent pressure switch assembly (1), a pump cover (2), an O-shaped ring (3), a water inlet and outlet valve (4), a water inlet and outlet valve seat (5), a diaphragm (6), a diaphragm insert (7), a pressure bearing seat (8), a bearing sleeve (9), a bearing (10), an eccentric (11), an adjusting gasket (12), a motor front cover (13), a motor (14), a motor shell (15), fan blades (16), a fan cover (17) and a shock pad (18) from top to bottom in sequence, wherein the intelligent pressure switch assembly (1) is installed on the pump cover (2); the O-shaped ring (3) is mounted on the pump cover (2); the water inlet and outlet valve (4) is arranged on the water inlet and outlet valve seat (5); the diaphragm insert (7) is inlaid into a piston block of the diaphragm (6) during injection molding; the eccentric (11) is mounted to a bearing (10); the bearing (10) is mounted on the bearing sleeve (9); the diaphragm insert (7) passes through the positioning hole of the pressure-bearing seat (8), the diaphragm insert (7) is put into the piston push rod of the bearing sleeve (9), and the back of the piston push rod of the bearing sleeve (9) is fixed by a screw; the motor (14) passes through the positioning hole of the motor front cover (13) and is fixed by a screw; the adjusting gasket (12) is arranged at the shaft center of the motor (14); the motor shell (15) is mounted on the motor front cover (13); the fan blade (16) is mounted at the tail part of the shaft of the motor (14); the fan cover (17) is mounted on the motor casing (15); the shock pad (18) is mounted to the motor housing.

2. The miniature four-chamber diaphragm pump of claim 1, wherein said diaphragm has 4 working chambers on its upper side.

3. A miniature four-chamber diaphragm pump according to claim 1, characterized in that the diaphragm insert (7) is made of glass fiber reinforced polypropylene.

4. The miniature four-cavity diaphragm pump according to claim 1, wherein the diaphragm (6) is embedded in a piston block (602) of the diaphragm when being injection molded, the diaphragm is made of thermoplastic elastomer (TPV), the material per se contains PP components, the injection molding temperature is close to that of the diaphragm insert, and therefore after the diaphragm is injection molded, the connecting part of the diaphragm (6) and the diaphragm insert (7) is fused into a whole to be sealed; the diaphragm (6) is provided with a buffer curved surface (603).

5. The miniature four-chamber diaphragm pump according to claim 1, wherein the lead screw (701) of the diaphragm insert is mounted into the piston rod of the bearing housing through the positioning hole (801) of the pressure bearing seat (8) and is screwed from the back of the piston rod (901) of the bearing housing (9).

6. The miniature four-chamber diaphragm pump according to claim 1, characterized in that the material of the bearing housing (9) is glass fiber nylon reinforced.

7. The miniature four-chamber diaphragm pump of claim 1, wherein the motor shaft tail has independent cooling fans (16).

8. A miniature four-chamber diaphragm pump according to claim 1, characterized in that the bottom and sides of the motor front cover (13) are provided with ventilation holes.