Diaphragm pump sprayer

The present invention is applicable to the fields of spraying and chemical agent instruments, and provides a diaphragm pump sprayer comprising a housing in which a battery, a motor and a hose are arranged, with one end of the hose being connected with a sinking water inlet ball and the other end being connected with a spray head, characterized in that: a diaphragm pump for water pumping is also arranged within the housing, one end of the diaphragm pump is connected with the hose and the other end is connected with the spray head, and the diaphragm pump is driven for water pumping by the battery and the motor. The diaphragm pump sprayer provided in the present invention realizes the purpose of pumping and spraying liquid by the diaphragm pump sprayer. The diaphragm pump, which has high chemical corrosion resistance and high working efficiency, is employed as a substitute for existing gear pumps, piston pumps and peristaltic pumps in the present invention.

TECHNICAL FIELD

The present invention belongs to the fields of spraying and chemical agent instruments, and in particular relates to a diaphragm pump sprayer.

BACKGROUND ART

As is well known, in agricultural production, spraying pesticides is an extremely important procedure, because it is directly related to crop harvest. While due to the fact that the pesticides contain relatively high toxicity, people will typically use a spraying device to spray the pesticides on crops.

In daily life, spraying chemical agents for household disinfection care is also achieved by means of the spraying device. But the traditional spraying devices are mostly is a manual type, which are complicated in operation, excessively in long operation time, and can easily cause fatigue.

The spraying devices currently used are mainly a gear pump sprayer, a piston pump sprayer, a peristaltic pump sprayer, etc but these sprayers have the disadvantages as below

(1) if the gear pump sprayer is used for pumping chemical fluids, obviously its service life cannot be secured because the chemical fluids are strong in corrosion, when the chemical fluids pass through the gear pump, it is easy to etch off or brush off the grease which playing the functions of sealing and lubricating in the gear pump, thereby causing the gear pump to stop working so that the service life is short, and additionally, the gear pump with low operation efficiency, is far away from meeting requirement of numerous fields.
(2) If the piston pump sprayer is used for pumping the chemical fluids, large friction force is produced as the piston and the pump inner chamber are well pressed, as a result, the operation efficiency is relatively low, energy consumption is relatively high, and it will produce lots of noises in operation, bring large difficulty in production and assembly as well as relatively high cost for use. Additionally, the pumped fluid (if the pumped fluid contains small particles) is easy to cause blocking between the piston and the pump chamber, largely reduces the operation efficiency of the pump body, and even breaks the whole pump.
(3) If the peristaltic pump sprayer is used to pump the chemical fluids, and because its operation principle is pumping the fluid into a spray head depending on a roller squeezing a hose, such that it is difficult to achieve a high pressure at the spray head to achieve an atomization effect. When the sprayer is provided a period of time without using, the hose will be deformed due to the squeezing of the roller, and even adhered together, thereby resulting in that the sprayer can't be normally used, making its service life largely reduced. If the roller's squeezing force is not enough, or the match between the wall side of the fixed hose and the roller is bad, its operation efficiency will be reduced to a great extent, and when the sprayer stops working, as the squeezing force is not enough, it cause the liquid backwash phenomenon. Additionally, this largely increases the difficulty of mass production, thereby resulting in a large amount of bad products, increasing its production cost.

SUMMARY OF THE INVENTION

The objectives of the present invention are to overcome the disadvantages of the foregoing prior art, provide a diaphragm pump sprayer which is chemical fluid corrosion preventable, anti-aging, highly efficient in operation and easy for mass production.

The present invention is achieved by a diaphragm pump sprayer, comprising a housing in which a battery, a motor and a hose are arranged, with one end of the hose being connected with a sinking water inlet ball, the other end being connected with a spray head, and a diaphragm pump used for water pumping is arranged within the housing, one end of the diaphragm pump being connected with the hose, the other end being connected with the spray head, the diaphragm pump being driven for water pumping by the battery and the motor.

Particularly, the diaphragm pump comprises a pump body and a pump cover mated with the pump body, a first chamber and a second chamber isolated from each other are arranged within the pump body, the first chamber and the second chamber are sealed by an elastic silicon sheet the elastic silicon sheet is injection-molded with a first push plate and a second push plate, and the first push plate and the second push plate are respectively driven by a first crank arranged on a first cam and a second crank arranged on a second cam.

The first chamber comprises a first water inlet and a first water outlet, the first water inlet is connected with the hose, the first water outlet is connected with the spray head, a first one-way water inlet valve is arranged at the first water inlet and can only introduce water in, and a first one-way water outlet valve is arranged at the first water outlet and can only discharge water.

The second chamber comprises a second water inlet and a second water outlet, the second water inlet is connected with the hose, the second water outlet is connected with the spray head, a second one-way water inlet valve is arranged at the second water inlet and can only introduce water in, and a second one-way water outlet valve is arranged at the second water outlet and can only discharge water.

More specifically, the first cam and the second cam are driven to rotate by the motor through a gear set.

The elastic piece is made of a corrosion-resistant and anti-ageing material or rubber material and is moulded together with a first push plate and a second push plate through injection moulding, so that in a return stroke of the push plates, the elastic piece enables the inner cavity of the pump body to produce a negative pressure due to the self-resilience force so as to realize a water absorbing function; in addition, the push plates can also give a pulling force to the elastic piece in the return stroke, so that the working efficiency of the diaphragm pump can be greatly improved.

The silica gel material has good corrosion resistance and anti-ageing property, thereby guaranteeing that the parts in contact with the liquid have long service life and are beneficial to wide application of the diaphragm pump sprayer in fields.

The hose is made of a silicon material, and the silicon material has good corrosion resistance and anti-ageing property, thereby guaranteeing that the parts in contact with the liquid have long service life and are beneficial to the wide application of the diaphragm pump sprayer in fields.

The spray head is rotatably arranged on the housing, different water spraying effects can be realized by rotating the spray head, to spray stream and fine mist.

The water inlet ball comprises a plastic casing and a ceramic ball arranged within the plastic casing, one end of the plastic casing is provided with a water inlet and the other end is connected with the hose. Both the plastic housing and the ceramic ball have good corrosion resistance and anti-ageing property, thereby guaranteeing that the parts in contact with the liquid have long service life and are beneficial to the wide application of the diaphragm pump sprayer in fields.

Further, the diaphragm pump sprayer further comprises a circuit protection switch for switching on or off a circuit, and the circuit protection switch is electrically connected with the motor.

Therefore, the adverse consequences caused by misoperation are prevented, and double guarantee is achieved.

When the diaphragm pump sprayer provided by the present invention is used, the motor is powered by the battery, the motor starts to rotate after being electrified, the motor drives the diaphragm pump to start to pump water, liquid enters into the hose through the water inlet ball, then enters the diaphragm pump through the hose and finally is sprayed out from the spray head, thus the diaphragm pump sprayer provided in the present invention realizes the purpose of pumping and spraying the liquid by the diaphragm pump sprayer. The diaphragm pump, which has high chemical corrosion resistance and high working efficiency, is employed as a substitute for existing gear pumps, piston pumps and peristaltic pumps in the present invention.

DETAILED DESCRIPTION OF THE INVENTION

In order to make the objectives, technical solution and advantages of the present invention become more apparent, the present invention will be described in further details hereafter accompanying the drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

As shown inFIG. 1, the diaphragm pump sprayer provided by the embodiment of the present invention comprises a housing1in which a battery2, a motor3and a hose4are arranged, with one end of the hose4being connected with a sinking water inlet ball5, the other end being connected with a spray head6. A diaphragm pump7for water pumping is also arranged within the housing, one end of the diaphragm pump7being connected with the hose4, the other end being connected with the spray head6, the diaphragm pump7being driven for water pumping by the battery2and the motor3. When the diaphragm pump sprayer is used, a switch8which is electrically connected with the battery2is pressed with a hand while a switch10is turned on, the motor3is powered by the battery2, the motor3starts to rotate after being electrified, the motor3drives the diaphragm pump7to pump water, liquid enters into the hose4through the water inlet ball5and then enters the diaphragm pump7through the hose4, and finally is sprayed out from the spray head6, thus the diaphragm pump sprayer provided in the present invention realizes the purpose of pumping and spraying the liquid by the diaphragm pump sprayer. The diaphragm pump7, which has high chemical corrosion resistance and high working efficiency, is employed as a substitute for existing gear pumps, piston pumps and peristaltic pumps in the present invention.

Various components of the present invention will be described in details hereinafter.

As shown inFIG. 1, the housing1is composed of an upper cover11of and a lower cover12, the battery2, the motor3, the hose4, the spray head6, the diaphragm pump7, and the switch8are all located in the lower cover12, then the lower cover12and the upper cover11are mated, such that assembled to form a diaphragm pump sprayer.

As shown inFIG. 2, in particular, the diaphragm pump7comprises a pump body71and a pump cover72mated with the pump body71, a first chamber73and a second chamber74isolated from each other are arranged within the pump body71, the first chamber73and the second chamber74are sealed by an elastic piece75, and the elastic piece75is disposed opposite to a first push plate76and a second push plate77, and the first push plate76and the second push plate77are respectively driven by a first crank781arranged on a first cam78and a second crank791arranged on a second cam79.

As shown inFIGS. 1, 2, and 6, more particularly, the first chamber73comprises a first water inlet731and a first water outlet732, the first water inlet731is connected with the hose4, the first water outlet732is connected with the spray head6, a first one-way water inlet valve733is arranged at the first water inlet731, a first one-way water outlet valve734being arranged at the first water outlet732. The second chamber74comprises a second water inlet741and a second water outlet742, the second water inlet741is connected with the hose4, the second water outlet742is connected with the spray head6, a second one-way water inlet valve743is arranged at the second water inlet741, a second one-way water outlet valve744is arranged at the second water outlet742.

As shown inFIG. 3, more specifically, the first cam78and the second cam79are driven to rotate through a gear set9by the motor3, the specific connection of the gear set9being as follows: a rotation shaft of the motor3is fixedly provided with a pinion91, the pinion91driving a gearwheel92engaged therewith to rotate, and another pinion93is coaxially mounted with the gearwheel92, the pinion93driving another gearwheel94coaxially mounted with the first cam78to rotate, since the first cam78and the second cam79are connected together, so that the first cam78and the second cam79also rotate along with the gearwheel94. The invention achieves rotation driving of the motor3on the first cam78and the second cam79by the gear set9, the torque transmission is smooth, and the rotational speeds of the first cam78and the second cam79are also easy to control.

Preferably, the elastic piece75is made of a corrosion-resistant silicon material or rubber material, of course, also can be made of other corrosion-resistant materials, thus ensuring that the elastic piece75is not corrosive when the diaphragm pump7extracts corrosive liquid.

The specific pumping principle of the diaphragm pump7of the present invention is as follows:

(1) During the process of the motor3driving the first cam78and the second cam79through the gear set9, when the first crank781drives the first push plate76to squeeze the elastic piece75, the elastic piece75squeezes the first chamber73, and the liquid in the first chamber73is discharged through the first water outlet and sprayed out from the spray head6; meanwhile, the second crank791drives the second push plate77and the elastic piece75to leave the chamber74, the elastic piece75recovers gradually from the original squeezed state until being pulled outwards by the second push plate77, the volume of the second chamber74increases suddenly, the second chamber74forms a vacuum chamber, the external liquid successively passes through the water inlet ball5, the hose4and the second water inlet to enter the second chamber74under the action of atmospheric pressure, thereby achieving the water pumping purpose of the diaphragm pump7.
(2) Then, when the second crank791drives the second push plate77to squeeze the elastic piece75, the elastic piece75squeezes the second chamber74, and the liquid in the second chamber74is discharged through the second water outlet and sprayed out from the spray head6; meanwhile, the first crank781drives the first push plate76and the elastic piece75to leave the chamber73, the elastic piece75recovers gradually from the original squeezed state until being pulled outwards by the first push plate76, the volume of the first chamber73increases suddenly, the first chamber73forms a vacuum chamber, the external liquid successively passes through the water inlet ball5, the hose4and the first water inlet to enter the first chamber73under the action of atmospheric pressure, thereby achieving the water pumping purpose of the diaphragm pump7.
(3) In general, during the process of the motor3driving the first cam78and the second cam79to rotate through the gear set9, the first cam78and the second cam79make a relative motion, when the first cam drives the first crank781to drive the first push plate76to squeeze the elastic piece75, while the first chamber73is squeezed to spray water, the second cam drives the second crank791to drive the second push plate77and the elastic piece75to leave the second chamber74, resulting in the formation of the vacuum chamber to realize the water pumping effect; and consequently, the diaphragm pump achieves a two-way function, namely, both a water-pumping function and a water-spray function are achieved in each working stroke, thereby greatly improving the work efficiency. The novel design of the two-way diaphragm pump represents how the invention effectively provides the work efficiency of the sprayer, thus being superior to other existing pumps.

As the diaphragm pump sprayer of the present invention is mainly used for extracting and spraying chemical agents and these chemical agents are usually corrosive, in order to avoid the phenomenon that the hose4is bonded due to the corrosion of the chemical agents, the hose4is made of the silicon material capable of resisting chemical corrosion.

As shown inFIG. 1, the spray head6is rotatably arranged on the housing1, so that the chemical agents are sprayed out in the form of mist or water column, and the sprayed chemical agents are large in cover area and good in spraying effect.

As shown inFIGS. 1 and 4, the water inlet ball5comprises a plastic casing51and a ceramic ball52arranged within the plastic casing51, one end of the plastic casing51is provided with a water inlet53, and the other end is connected with the hose4. The ceramic ball52is arranged within the plastic casing51, since the ceramic ball52has a certain weight, the water inlet ball5can be completely soaked in the liquid, thereby ensuring that the diaphragm pump sprayer extracts the liquid normally.

As shown inFIG. 1, further, the diaphragm pump sprayer of the present invention also comprises a circuit protection switch10, the circuit protection switch10is electrically connected with the motor3, and the circuit protection switch10is used for switching on or switching off a circuit, thereby achieving the effect of well controlling the diaphragm pump sprayer and preventing the adverse consequences caused by misoperation.

The foregoing descriptions are only preferable embodiments of the present invention and are not used for limiting the present invention. Various modifications, equivalent substitutions and improvements which are made without departing from the spirit and principles of the present invention shall fall within the protective scope of the present invention.