Self-cleaning filter screen submersible pump
The utility model relates to a kind of water pump, and more particularly, it relates to a kind of submersible pump.
The pump housing need be put into water during submersible pump work, have impurity particle in water to be discharged by water outlet by drawing up after strainer filtering, because long-term work there will be filter net jam situation, once filter net jam makes to draw water, water outlet stops water outlet, one section of water column can be stayed when next stops pumping in pump just to there will be no-load condition because submersible pump is by water cooling itself but the impeller be not immersed in water rotates heat in atmosphere produces in a large number but leak owing to not having water cooling that mechanical seal can be caused to damage thus cause in pump because the impeller of motor also in working pump also rotates in continuation, transmission shaft also can be made to fracture or impeller is killed and then suppressed bad motor if idle time is long, the whole pump housing is damaged, cause huge economic loss.
The submersible pump that the Chinese patent that application number is 201420048585.X provides utilizes current impeller to rotate, impeller blade is provided with cleaning hairbrush, while vane rotary, hairbrush rotates cleaning filter screen, although this kind of technological scheme solves the problem that filter screen can not block, but bring new problem simultaneously, clear up impeller while drawing water is rotating the water that makes into always and under the effect of clearing up impeller, produce centrifugal action impact to intake efficiency, and the power of motor provides for making water upwards extract originally, but now water also will be supplied to the acting of cleaning wheel rotation, according to principle of conservation of energy, compare original power without needing motor to provide larger during cleaning impeller, taking out identical water in same time needs consumption more electric.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of self-cleaning filter screen submersible pump, and when filter net jam, just filter screen is cleaned in work, does not affect normal pumping, reduces power consumption, prevents the zero load heating of pump from damaging the pump housing simultaneously.
For achieving the above object, the utility model provides following technological scheme:
A kind of self-cleaning filter screen submersible pump, comprise the pump housing and filter screen, described its interior is provided with cleaning means, described cleaning means comprises hairbrush, running shaft and blade, described hairbrush is evenly arranged in running shaft circumferencial direction, described blade is evenly located at running shaft circumferencial direction, described blade is positioned at the top of hairbrush, described filter screen top is provided with by-pass, one end that described by-pass is communicated with pump housing outside is by-pass port, described by-pass is just provided with water outlet to leaf position, described by-pass port is provided with bypass assembly, described bypass assembly comprises spring and cone valve, described spring is connected with cone valve.
Pass through technique scheme, when solution filter screen works and blocks in the well water for a long time or in muddiness, by opening cone valve and give water supply that pump continues and passing through the water-band moving vane of coming in thus make running shaft rotate, reaching self-cleaning effect by being located at running shaft hairbrush cleaning filter screen circumferentially, preventing pump inner because zero load heating damages the pump housing.
As preferably, the described pump housing is provided with warning device, and described warning device comprises the position limit switch of series connection, warning light, power supply and main switch, and the top of described cone valve vertical direction is located at by described position limit switch.
Pass through technique scheme, filter screen outer wall cannot be cleaned because self-cleaning instrument is just arranged on its interior, just interim process avoids pump supply of cutting off the water supply to generate heat cannot obtain water cooling with unloaded, be connected to warning light by position limit switch and give the needs replacing of prompting explanation filter net jam or cleaning, avoid the damage causing pump.
As preferably, described position limit switch is set to waterproof position limit switch.
By technique scheme, solve the normal work of position limit switch in water, prevent position limit switch from intaking.
Compared with prior art; the advantage of the utility model self-cleaning filter screen submersible pump is: can filter net jam in emergency circumstances just action self-cleaning filter screen and can sending change or prompting cleaning filter screen signal; using electricity wisely; and the safer pump of protecting again of the work of pump is not damaged, kill two birds with one stone.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model self-cleaning filter screen submersible pump embodiment;
Fig. 2 is the A portion broken section enlarged view of Fig. 1;
Fig. 3 is the filter structure schematic diagram of the utility model self-cleaning filter screen submersible pump embodiment;
Fig. 4 is the filter screen plan view of the utility model self-cleaning filter screen submersible pump embodiment;
Fig. 5 is the warning circuit figure of the utility model self-cleaning filter screen submersible pump embodiment.
Description of reference numerals: 1, safety check; 2, gate valve; 3, motor; 4, control cabinet; 41, warning light; 5, pressure gauge; 6, head motion; 7, drain opening support; 8, lifting pipe; 9, workpiece; 10, bottom valve; 11, filter screen; 111, hairbrush; 112, running shaft; 113, filter opening; 114, by-pass port; 115, cone valve; 116, spring; 117, position limit switch; 118, by-pass; 119, water outlet; 120, blade; 20,220V ac power supply; 30, main switch; 40, position limit switch.
With reference to accompanying drawing, the utility model self-cleaning filter screen submersible pump embodiment is described in further details.
See Fig. 1, described self-cleaning filter screen submersible pump comprises safety check 1, gate valve 2, motor 3, control cabinet 4 are located at warning light 41, pressure gauge 5, head motion 6, drain opening support 7, lifting pipe 8, workpiece 9, bottom valve 10 and filter screen 11 on control cabinet, the vane rotary be located in workpiece 9 is driven to make inside be partially formed negative pressure of vacuum by motor 3, under the atmospheric effect in the external world, well water enters the pump housing after being filtered by the filter screen 11 being located at bottom of device, by drain opening, well water discharge is used for the effects such as irrigation, water supply, draining.
See Fig. 2 to Fig. 4, described filter screen 11 is located at the bottom position of self-cleaning filter screen submersible pump, first well water filtered by filter screen 11 and large granular impurity or silt cannot be passed through, when filter screen 11 blocks, well water cannot make do not have water discharge to supply water or to irrigate in suction pump, the effect of bypass valve is played by the combination of the cone valve 115 and spring 116 of being located at filter screen 11 top, can open when filter opening 113 is blocked by large granular impurity, well water is entered by by-pass port 114, flow out from water outlet 119, while outflow, current can drive and be located at running shaft 112 upper blade 120 whole running shaft 112 is rotated, the hairbrush 111 be located on running shaft 112 can make partial impurities be brushed out by brush filter screen 11 inwall by rotation, discharge due to all impurity cannot be made therefore a position limit switch 117 is set on the top of cone valve 115, due to cone valve 115 open while can touch position limit switch 117, position limit switch 117 can send electrical signal and change filter screen 11 or cleaning by lighting warning light 41 prompter, position limit switch 117 preferably model is the waterproof position limit switch of SZ-3101, cone valve 115 makes valve body prop up by-pass port 114 by spring 116, the rigidity of described spring 116 is arranged in when filter screen 11 normally works can not open cone valve 115, test of many times can be had to select satisfied spring 116, tentatively clean filter screen 11 afterwards cone valve 115 again block by-pass port 114 because the elastic potential energy of spring 116 can be restored.
See Fig. 5, for the circuit diagram of described warning device, comprise the 220V ac power supply 20 of series connection mutually, main switch 30, position limit switch 40 and warning light 41, during work, main switch 30 closes, when cone valve 115 is opened, when the spool of its cone valve 115 touches position limit switch 40, position limit switch 40 closes, circuit communication, warning light 41 is lighted, and is pointed out to people by warning light 41.
Pass through technique scheme, by opening cone valve 115 when making filter screen 11 block, current band moving vane 120 rotates and makes hairbrush 111 clean filter screen 11 inwall, although whole filter screen 11 cannot be made to clean up but avoid pump heating to destroy seal ring, time serious, destruction pump causes loss economically.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.