CN113117914A

CN113117914A - Injection apparatus on water pump

Info

Publication number: CN113117914A
Application number: CN202110255587.0A
Authority: CN
Inventors: 张宇佳
Original assignee: Individual
Current assignee: Zhejiang Taifu Pump Co Ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-07-16
Anticipated expiration: 2041-03-09
Also published as: CN113117914B

Abstract

The invention relates to the technical field of water pumps, in particular to a spraying device on a water pump, which comprises a hollow pipe, one end of the hollow pipe far away from the first reducing pipe is in threaded connection with an internal thread cover, a cylindrical pipe is fixed in the middle of the inner surface of the internal thread cover, a rubber plug is arranged in the cylindrical tube in a sliding way, a round rod is arranged on one surface of the rubber plug, which is far away from the internal thread cover, one end of the round rod, which is far away from the rubber plug, penetrates through the cylindrical pipe and extends into the second reducing pipe, one side of the hollow pipe, which is close to the first reducing pipe, is fixed with a limiting cylinder, a limiting ring is fixed at one end of the second reducing pipe, which is far away from the limiting cylinder, a gas injection assembly for injecting gas into the cylindrical pipe is installed at one end of the internal thread cover, which is far away from the hollow pipe, three reset components are annularly and equidistantly arranged between the internal thread cover and the limiting ring, and compared with the prior art, the invention has the following beneficial effects: the convenient adjustment of the flow velocity of the ejected water flow is realized.

Description

Injection apparatus on water pump

Technical Field

The invention relates to an injection device on a water pump, belonging to the technical field of water pumps.

Background

Water pumps are machines that deliver or pressurize a liquid. It transfers the mechanical energy of prime mover or other external energy to liquid to increase the energy of liquid, and is mainly used to transfer liquid including water, oil, acid-base liquid, emulsion, suspoemulsion and liquid metal. Liquids, gas mixtures, and liquids containing suspended solids may also be transported. The technical parameters of the water pump performance include flow, suction lift, shaft power, water power, efficiency and the like. At present, the spray structure connected to the water pump is mostly fixed, the speed of the water flow can not be adjusted according to needs, and the application range is small.

Disclosure of Invention

In view of the shortcomings of the prior art, the present invention provides a spraying device for a water pump, so as to solve the problems in the background art.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides an injection apparatus on water pump, includes the hollow tube, the first reducing pipe of detachable is installed to hollow tube one end, the one end surface mounting that the hollow tube is close to first reducing pipe has the coupling that is connected with water pump play water end, the one end threaded connection that first reducing pipe was kept away from to the hollow tube has the internal thread lid, internal thread lid internal surface middle part rigidity has the drum pipe, slidable mounting has the rubber buffer in the drum pipe, the round bar is installed to the one side that the rubber buffer deviates from the internal thread lid, the one end that the round bar kept away from the rubber buffer runs through the drum pipe and extends to in the second reducing pipe, the second reducing pipe sets up in the hollow tube, the one end that the round bar is in the second reducing pipe is that the annular equidistance is fixed with three branch, the one end that the round bar was kept away from to branch is fixed with spacing section of thick bamboo with second reducing pipe fixed, the one end that spacing section of thick bamboo was kept away from to the second reducing pipe is fixed with the spacing ring, the one end that the internal thread lid deviates from the hollow tube is installed to the gas injection subassembly of gas injection in the drum pipe, it installs three reset assembly to be annular equidistance between internal thread lid and the spacing ring, the return bend is installed to the one end that the drum pipe is close to the internal thread lid, the one end that the drum pipe was kept away from to the return bend runs through the internal thread lid and is connected with the ball valve.

Specifically, the gas injection subassembly includes the check valve, the one side middle part position that the internal thread lid deviates from the hollow tube is installed to the check valve that switches on to the drum pipe direction, the check valve is linked together with the drum pipe, the one side that the check valve kept away from the internal thread lid is connected with the hose, the one end that the check valve was kept away from to the hose is connected and is aerifyd the gasbag.

Specifically, the face that the spacing ring deviates from the second reducing pipe is that three second semicircle ring is installed to annular equidistance, the internal thread lid internal surface is fixed with three first semicircle ring with second semicircle ring matched with annular equidistance, bolt system elastic webbing in the first semicircle ring, the one end that first semicircle ring was kept away from to the elastic webbing is connected with the second semicircle ring.

Specifically, the cover is equipped with the supporting disk on the drum pipe, supporting disk one side middle part rigidity has the cylinder circle, the cylinder circle cover is established on the drum pipe and with drum pipe fixed connection, supporting disk one side is personally submitted annular equidistance and has been seted up three through-hole, the elastic webbing passes through the through-hole.

Specifically, the second reducing pipe is internally hinged with a baffle disc which can rotate in the direction away from the cylinder pipe, a rubber ring is fixed on the outer surface of the baffle disc, and the rubber ring is attached to the inner surface of the second reducing pipe.

Specifically, the end of the cylindrical pipe, which is far away from the internal thread cover, is fixed with a rubber sleeve, and the rubber sleeve is sleeved on the round rod and attached to the outer surface of the round rod.

Specifically, be equipped with the sealing washer between internal thread lid and the hollow tube, the one end surface processing of hollow tube installation internal thread lid has the external screw thread with internal thread lid matched with, the hollow tube is close to an pot head of internal thread lid and is equipped with the fender ring with hollow tube fixed connection, keep off the ring and be annular equidistance towards the one side of internal thread lid and seted up a plurality of blind hole, keep away from one side of internal thread lid in the blind hole and install first magnet, first magnet is equipped with mobilizable and the second magnet that repels mutually with first magnet towards one side of internal thread lid, the rubber column cap of laminating mutually with the internal thread lid is installed to the one side that the second magnet deviates from first magnet.

Specifically, two rubber blocks are symmetrically fixed on the outer surface of the rubber column head, two limiting grooves matched with the rubber blocks are symmetrically formed in the blind hole, the limiting grooves are arranged along the length direction of the blind hole, and the rubber blocks are slidably mounted in the limiting grooves.

The invention has the beneficial effects that:

1. the invention relates to a spraying device on a water pump, when the flow speed of spraying water needs to be improved, air is injected into a cylindrical pipe by using an air injection assembly, then the cylindrical pipe is positioned in a space between a rubber plug and an internal thread cover, the gas is increased, the rubber plug moves along the cylindrical pipe to the direction far away from the internal thread cover under the action of air pressure, then the rubber plug drives a second reducing pipe to move through a support rod of a round rod until the second reducing pipe passes through a limiting cylinder and is inserted into a first reducing pipe, at the moment, a limiting ring is attached to the limiting cylinder and is positioned between the limiting cylinder and a pipe joint, further, the water flowing into a hollow pipe flows into the second reducing pipe and is sprayed out of the second reducing pipe, because the diameter of the second reducing pipe is smaller than that of the first reducing pipe, further, under the condition that the inflow flow rate is unchanged, the flow speed of sprayed water flow is increased, the intraductal gas of drum passes through the return bend and discharges, and then under reset assembly's effect, and the second reducing pipe resets and keeps away from to the moisture that flows in the hollow tube jets through first reducing pipe, and the velocity of flow of rivers reduces this moment, realizes the convenient adjustment of the velocity of flow of the rivers that jet.

2. According to the spraying device on the water pump, when the moisture flowing into the hollow pipe is sprayed out of the first reducing pipe, part of the moisture flows into the second reducing pipe, the baffle disc plays a role in blocking the moisture, and the second reducing pipe is convenient to reset quickly under the action of the moisture reaction force.

3. According to the injection device on the water pump, when the internal thread cover is screwed on the hollow pipe, the internal thread cover is in contact with the retaining ring, the rubber column head is locked in the blind hole under the extrusion of the internal thread cover, the distance between the first magnet and the second magnet is reduced, the repulsive force between the first magnet and the second magnet is increased, and the rubber column head is tightly attached to the internal thread cover under the action of the repulsive force between the first magnet and the second magnet, so that the effect of preventing the internal thread cover from randomly rotating is achieved, and the connection reliability of the internal thread cover and the hollow pipe is improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural diagram of an injection device of a water pump according to the present invention;

FIG. 2 is a schematic view showing the assembly of an internal thread cap, a first reducer, a second reducer and a hollow pipe in a spray device of a water pump according to the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

in the figure: 1. hollow tube, 2, pipe joint, 3, first reducing pipe, 4, baffle ring, 5, internal screw thread cover, 6, hose, 7, inflatable air bag, 8, spacing cylinder, 9, second reducing pipe, 10, baffle disc, 11, support rod, 12, spacing ring, 13, cylinder pipe, 14, support disc, 15, cylinder ring, 16, round bar, 17, sealing ring, 18, elbow pipe, 19, ball valve, 20, check valve, 21, first semicircle ring, 22, rubber plug, 23, elastic band, 24, through hole, 25, second semicircle ring, 26, rubber sleeve, 27, first magnet, 28, second magnet, 29, rubber column head, 30, spacing groove, 31, rubber block, 32, blind hole.

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.

Referring to fig. 1 to 3, the present invention provides a technical solution: the utility model provides a spray device on water pump, includes hollow tube 1, and the first reducing pipe 3 of detachable is installed to hollow tube 1 one end, and hollow tube 1 is close to the one end surface mounting of first reducing pipe 3 and has a coupling 2 that is connected with the water pump play water end, and the design of coupling 2 is convenient for hollow tube 1 and water pump play water end to be connected.

The one end threaded connection that hollow tube 1 kept away from first reducing pipe 3 has internal thread lid 5, and internal thread lid 5 realizes the shutoff to hollow tube 1 one end, provides the installation carrier simultaneously for cylinder pipe 13.

A cylindrical tube 13 is fixed in the middle of the inner surface of the internal thread cover 5, a rubber plug 22 is arranged in the cylindrical tube 13 in a sliding way, and the rubber plug 22 plays a role of separating the inner space of the cylindrical tube 13.

Rubber buffer 22 deviates from the one side of female cap 5 and installs round bar 16, round bar 16 keeps away from the one end of rubber buffer 22 and runs through cylinder pipe 13 and extend to in the second reducing pipe 9, second reducing pipe 9 sets up in hollow tube 1, round bar 16 is the one end in second reducing pipe 9 and is fixed with three branch 11 by annular equidistance, branch 11 keeps away from round bar 16's one end and second reducing pipe 9 fixed connection, branch 11 plays the effect of connecting round bar 16 and second reducing pipe 9.

One side that is close to first reducing pipe 3 in hollow tube 1 is fixed with spacing section of thick bamboo 8, and the one end that spacing section of thick bamboo 8 was kept away from to second reducing pipe 9 is fixed with spacing ring 12, and spacing section of thick bamboo 8 cooperatees with spacing ring 12, realizes restricting second reducing pipe 9 moving range.

The end of the internal thread cover 5 departing from the hollow tube 1 is provided with a gas injection component for injecting gas into the cylindrical tube 13, three reset components are arranged between the internal thread cover 5 and the limit ring 12 in an annular equal distance, the end of the cylindrical tube 13 close to the internal thread cover 5 is provided with a bent tube 18, the end of the bent tube 18 far away from the cylindrical tube 13 penetrates through the internal thread cover 5 and is connected with a ball valve 19, when the flow rate for injecting water needs to be improved, the gas injection component is used for injecting air into the cylindrical tube 13, then the gas in the space between the rubber plug 22 and the internal thread cover 5 of the cylindrical tube 13 is increased, then the rubber plug 22 moves towards the direction far away from the internal thread cover 5 along the cylindrical tube 13 under the action of air pressure, then the rubber plug 22 drives the second reducer 9 to move through the support rod 11 of the round rod 16 until the second reducer 9 passes through the limit cylinder 8 and is inserted into the first reducer 3, at the moment, and spacing ring 12 is in between 8 and the coupling 2 of spacing section of thick bamboo, and then the moisture that flows into in hollow tube 1 flows in second reducing pipe 9 and erupts from second reducing pipe 9 in, be less than first reducing pipe 3 pipe diameters because of second reducing pipe 9 pipe diameter, and then under the unchangeable circumstances of inflow, the rivers velocity of flow that erupts increases, open ball valve 19 back, the gas in the drum pipe 13 passes through return bend 18 and discharges, and then under reset assembly's effect, second reducing pipe 9 resets and keeps away from, thereby the moisture that flows into in hollow tube 1 erupts through first reducing pipe 3, the rivers velocity of flow reduces this moment, realize the convenient adjustment of the rivers velocity of flow that erupts.

As an embodiment of the present invention: the gas injection subassembly includes check valve 20, the check valve 20 that switches on to cylinder pipe 13 direction is installed to the one side middle part position that internal thread lid 5 deviates from hollow tube 1, check valve 20 is linked together with cylinder pipe 13, the one side that internal thread lid 5 was kept away from to check valve 20 is connected with hose 6, the one end that check valve 20 was kept away from to hose 6 is connected and is aerifyd gasbag 7, extrude repeatedly and aerify gasbag 7, and then check valve 20 opens under pressure differential's effect, and then the air in aerifing gasbag 7 passes through in hose 6 flows into cylinder pipe 13, the realization is to injecting the air in cylinder pipe 13, it is at the in-process that resets to aerify gasbag 7, check valve 20 is in the closure state, thereby prevent the air reflux in the.

As an embodiment of the present invention: the one side that spacing ring 12 deviates from second reducing pipe 9 is the annular equidistance and installs three second semicircle ring 25, the internal surface of internal thread lid 5 is fixed with three first semicircle ring 21 with second semicircle ring 25 matched with in annular equidistance, the bolt is elastic webbing 23 in the first semicircle ring 21, the one end that first semicircle ring 21 was kept away from to elastic webbing 23 is connected with second semicircle ring 25, bolt respectively on first semicircle ring 21 and second semicircle ring 25 with the both ends of elastic webbing 23, realize being connected of elastic webbing 23 and spacing ring 12 and internal thread lid 5, when second reducing pipe 9 removes to first reducing pipe 3 in, elastic webbing 23 is in tensile state, when opening ball valve 19, under the effect of elastic webbing 23 resilience force, be convenient for make second reducing pipe 9 remove to the normal position.

As an embodiment of the present invention: the supporting disc 14 is sleeved on the cylindrical tube 13, a cylindrical ring 15 is fixed in the middle of one side of the supporting disc 14, the cylindrical ring 15 is sleeved on the cylindrical tube 13 and is fixedly connected with the cylindrical tube 13, one side of the supporting disc 14 is in an annular equidistant shape, three through holes 24 are formed in the side of the supporting disc, the elastic band 23 penetrates through the through holes 24, the contact area between the supporting disc 14 and the cylindrical tube 13 is increased due to the design of the cylindrical ring 15, the connection stability between the supporting disc 14 and the cylindrical tube 13 is improved, the supporting disc 14 and the internal thread cover 5 jointly play a role in supporting the cylindrical tube 13, the structure stability of the cylindrical tube 13 is improved, and the elastic.

As an embodiment of the present invention: second reducing pipe 9 is interior to articulate to be connected with can be to keeping away from 13 direction pivoted fender dishes 10 of drum pipe, keep off dish 10 external fixation and have the rubber circle, the rubber circle is laminated mutually with second reducing pipe 9 internal surface, when the moisture of inflow hollow tube 1 jets in following first reducing pipe 3, partial moisture flows in second reducing pipe 9, keep off dish 10 this moment and play the effect that blocks moisture, under moisture reaction force effect, be convenient for make second reducing pipe 9 reset fast, the design of rubber circle is prevented keeping off dish 10 and second reducing pipe 9 and is taken place hard collision and produce the abnormal sound.

As an embodiment of the present invention: the end of the cylindrical pipe 13 far away from the internal thread cover 5 is fixed with a rubber sleeve 26, the rubber sleeve 26 is sleeved on the round rod 16 and is attached to the outer surface of the round rod 16, the round rod 16 penetrates through the rubber sleeve 26 in the cylindrical pipe 13 to play a role in sealing and water proofing, and water proofing is divided into the cylindrical pipe 13.

As an embodiment of the present invention: a sealing ring 17 is arranged between the internal thread cover 5 and the hollow pipe 1, and the sealing ring 17 is arranged between the internal thread cover 5 and the hollow pipe 1, so that the sealing property between the internal thread cover 5 and the hollow pipe 1 is improved.

The outer surface of one end of the hollow tube 1, which is provided with the internal thread cover 5, is provided with external threads matched with the internal thread cover 5, one end of the hollow tube 1, which is close to the internal thread cover 5, is provided with a baffle ring 4 fixedly connected with the hollow tube 1, one surface of the baffle ring 4, which faces the internal thread cover 5, is provided with a plurality of blind holes 32 at equal intervals in a ring shape, one side, which is far away from the internal thread cover 5, in the blind holes 32 is provided with a first magnet 27, one side, which faces the internal thread cover 5, of the first magnet 27 is provided with a second magnet 28 which is movable and is repulsive to the first magnet 27, one surface, which is far away from the first magnet 27, is provided with a rubber column head 29 which is attached to the internal thread cover 5, when the internal thread cover 5 is screwed on the hollow tube 1, the internal thread cover 5 is contacted with the baffle ring 4, at, the repulsive force between the first magnet 27 and the second magnet 28 is increased, and then the rubber column head 29 is tightly attached to the internally threaded cap 5 under the action of the repulsive force between the first magnet 27 and the second magnet 28, so that the function of preventing the internally threaded cap 5 from freely rotating is achieved, and the reliability of connection between the internally threaded cap 5 and the hollow tube 1 is improved.

As an embodiment of the present invention: two rubber blocks 31 are symmetrically fixed on the outer surface of the rubber column head 29, two limiting grooves 30 matched with the rubber blocks 31 are symmetrically formed in the blind hole 32, the limiting grooves 30 are arranged along the length direction of the blind hole 32, the rubber blocks 31 are slidably mounted in the limiting grooves 30, the rubber blocks 31 are inserted into the limiting grooves 30, the effect of limiting the position of the rubber column head 29 is achieved, and the rubber column head 29 and the second magnet 28 are prevented from falling from the blind hole 32 at will.

The specific implementation mode is as follows: when the flow rate of the ejected water needs to be increased, air is injected into the cylindrical tube 13 by the air injection assembly, so that the gas in the space between the rubber plug 22 and the internal thread cover 5 in the cylindrical tube 13 increases, the rubber plug 22 moves along the cylindrical tube 13 to the direction far away from the internal thread cover 5 under the action of air pressure, the rubber plug 22 drives the second reducer tube 9 to move through the support rod 11 of the round rod 16 until the second reducer tube 9 passes through the limiting tube 8 and is inserted into the first reducer tube 3, at this time, the limiting ring 12 is attached to the limiting tube 8, the limiting ring 12 is positioned between the limiting tube 8 and the tube joint 2, so that the water flowing into the hollow tube 1 flows into the second reducer tube 9 and is ejected from the second reducer tube 9, because the diameter of the second reducer tube 9 is smaller than that of the first reducer tube 3, and further, under the condition that the inflow rate of water is unchanged, the flow rate of the ejected water flow increases, after opening ball valve 19, the gaseous elbow 18 of passing through in the cylinder pipe 13 discharges, and then under reset assembly's effect, second reducing pipe 9 resets and keeps away from to the moisture that flows into in the hollow tube 1 jets through first reducing pipe 3, and the velocity of flow of rivers reduces this moment, realizes the convenient adjustment of the velocity of flow of the rivers that jet.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A spray device on a water pump, comprising a hollow tube (1), characterized in that: the utility model discloses a reducing pipe, including hollow tube (1), one end outer surface mounting that hollow tube (1) is close to first reducing pipe (3) has pipe joint (2) that are connected with water pump outlet end, the one end threaded connection that first reducing pipe (3) were kept away from in hollow tube (1) has internal thread lid (5), internal thread lid (5) internal surface middle part position is fixed with cylinder pipe (13), slidable mounting has rubber buffer (22) in cylinder pipe (13), round bar (16) are installed to the one side that rubber buffer (22) deviate from internal thread lid (5), the one end that rubber buffer (22) were kept away from in round bar (16) runs through cylinder pipe (13) and extends to in second reducing pipe (9), second reducing pipe (9) set up in hollow tube (1), the one end that round bar (16) are in second reducing pipe (9) is annular equidistance and is fixed with three branch (11), one end and second reducing pipe (9) fixed connection of round bar (16) are kept away from in branch (11), one side that is close to first reducing pipe (3) in hollow tube (1) is fixed with spacing section of thick bamboo (8), the one end that spacing section of thick bamboo (8) were kept away from in second reducing pipe (9) is fixed with spacing ring (12), the gas injection subassembly of gas injection in to cylinder pipe (13) is installed to the one end that interior screw cap (5) deviate from hollow tube (1), it installs three reset assembly to be annular equidistance between screw cap (5) and spacing ring (12), return bend (18) are installed to the one end that cylinder pipe (13) are close to interior screw cap (5), return bend (18) are kept away from the one end of cylinder pipe (13) and are run through interior screw cap (5) and are connected with ball valve (19).

2. The spray device on a water pump of claim 1, wherein: the gas injection subassembly includes check valve (20), check valve (20) that switch on to cylinder pipe (13) direction are installed to one side middle part position that internal thread lid (5) deviate from hollow tube (1), check valve (20) are linked together with cylinder pipe (13), the one side that internal thread lid (5) were kept away from in check valve (20) is connected with hose (6), air bag (7) are connected to the one end that check valve (20) were kept away from in hose (6).

3. The spray device on a water pump of claim 1, wherein: the one side that spacing ring (12) deviate from second reducing pipe (9) is annular equidistance and installs three second semicircle ring (25), internal thread lid (5) internal surface is annular equidistance and is fixed with three first semicircle ring (21) with second semicircle ring (25) matched with, bolt elastic webbing (23) in first semicircle ring (21), the one end that first semicircle ring (21) were kept away from in elastic webbing (23) is connected with second semicircle ring (25).

4. The spray device on a water pump of claim 3, characterized in that: the cover is equipped with supporting disk (14) on cylinder pipe (13), supporting disk (14) one side middle part position fixing has tube ring (15), tube ring (15) cover establish on cylinder pipe (13) and with cylinder pipe (13) fixed connection, supporting disk (14) one side is the annular equidistance and has seted up three through-hole (24), elastic webbing (23) run through-hole (24).

5. The spray device on a water pump of claim 1, wherein: the inner surface of the second reducer pipe (9) is hinged with a baffle disc (10) which can rotate back to the direction of the cylindrical pipe (13), the outer surface of the baffle disc (10) is fixed with a rubber ring, and the rubber ring is attached to the inner surface of the second reducer pipe (9).

6. The spray device on a water pump of claim 1, wherein: keep away from the one end of internal thread lid (5) in cylinder pipe (13) and be fixed with rubber sleeve (26), rubber sleeve (26) cover is established on round bar (16) and is laminated mutually with round bar (16) surface.

7. The spray device on a water pump of claim 1, wherein: a sealing ring (17) is arranged between the internal thread cover (5) and the hollow pipe (1), the outer surface of one end of the hollow pipe (1) provided with the internal thread cover (5) is provided with an external thread matched with the internal thread cover (5), one end of the hollow pipe (1) close to the internal thread cover (5) is sleeved with a baffle ring (4) fixedly connected with the hollow pipe (1), the baffle ring (4) is provided with a plurality of blind holes (32) in an annular shape at equal intervals on one surface facing the internal thread cover (5), a first magnet (27) is arranged on one side of the blind hole (32) far away from the internal thread cover (5), one side of the first magnet (27) facing the internal thread cover (5) is provided with a movable second magnet (28) which is repulsive to the first magnet (27), and a rubber column head (29) jointed with the internal thread cover (5) is arranged on one surface of the second magnet (28) departing from the first magnet (27).

8. The spray device on a water pump of claim 7, wherein: rubber column cap (29) surface symmetry is fixed with two rubber blocks (31), two spacing grooves (30) with rubber block (31) matched with have been seted up to the symmetry in blind hole (32), spacing groove (30) are arranged along the length direction of blind hole (32), rubber block (31) slidable mounting is in spacing groove (30).