CN212642983U - Non-tank intelligent jet pump - Google Patents

Abstract

The utility model relates to a tank-free intelligent jet pump, which comprises a pump body, a motor and a controller, wherein the pump body is provided with a cavity, a water inlet channel and a water outlet channel, the pump body is provided with a valve structure communicated with the water outlet channel and a hydraulic detector fastened with the valve structure, and the controller is respectively connected with the motor and the hydraulic detector; the first end of the hollow cavity of the spray pipe is communicated with the water inlet channel of the pump body and is communicated with the water outlet of the nozzle, and a gap is formed between the first end of the hollow cavity and the water outlet of the nozzle. This no jar intelligent jet pump not only forms the jet structure of helping hand liquid suction through nozzle and spray tube, but also can realize the accuracy and the safety inspection to the internal water level of pump through the hydraulic pressure detector that sets up, and then realize the automated control of water pump.

Description

Non-tank intelligent jet pump

Technical Field

The utility model relates to a water pump field especially relates to a no jar intelligent injection pump.

Background

The jet pump is a fluid-dynamic pump. Jet pumps, also known as jet pumps, pump out gas from a container using high velocity jets through a nozzle to achieve a vacuum effect.

In order to enable the jet pump to realize automatic control of the water pump, a pressure switch is usually installed at the water outflow channel of the pump body, a check valve is installed at the water inflow channel of the pump body, and the pressure switch and the check valve are matched together to act through the pressure in the pump body, so that the effect of automatic stop and start is achieved. The pressure switch is used for detecting the water body hydraulic pressure in the fluid outflow channel, and when the hydraulic pressure in the water body outflow channel is higher than a set value, the power supply of the motor of the water pump is cut off, and the motor stops rotating; when the hydraulic pressure in the water outflow channel is lower than a set value, the power supply of the water pump motor is switched on, and the motor is started to rotate. If under the condition of small flow of the water body, once the water body flows out, the pump is started, but the pressure in the pipeline is increased instantly due to the small flow of the water body, and the motor is stopped immediately; the pump is started again along with the continuous outflow of the small-flow water body, so that the pump is frequently started due to circulation, and the motor is damaged.

However, existing jet pumps have some disadvantages: need install pressure switch and check valve and overhead tank in the pump body, just can accomplish the automatic control to the water pump, but because of the space in the pump body is limited, in case install pressure switch and check valve and overhead tank again and tend the whole water pump of greatly increased structure complexity.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a no jar intelligent jet pump is provided to above-mentioned prior art. This no jar intelligent injection pump sets up the hydraulic pressure detector that sprays the structure and be linked together with the valve structure of the pump body through increasing, can realize entering into the effect of the liquid backward jet backward flow once more in the pump body.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: can-free intelligent injection pump, including the pump body, motor and controller, the pump body has cavity, inlet channel and outlet channel, and the cavity communicates inlet channel and outlet channel respectively, is provided with the valve structure who communicates outlet channel on the pump body and with valve structure fastening connection's hydraulic pressure detector, motor and hydraulic pressure detector, its characterized in that are connected respectively to the controller, be provided with in the cavity of the pump body:

the nozzle is provided with a cavity and a water inlet and a water outlet which are respectively positioned at two ends of the cavity, the cavity is respectively communicated with the water inlet and the water outlet, and the caliber size of the water inlet is larger than that of the water outlet;

the spray pipe is provided with a hollow cavity, the first end of the hollow cavity is communicated with the water inlet channel of the pump body and is mutually communicated with the water outlet of the nozzle, and a gap is formed between the first end of the hollow cavity and the water outlet of the nozzle;

the guide vane is arranged close to the second end of the hollow cavity and is provided with a first through hole communicated with the second end of the hollow cavity;

the impeller is matched with the guide vane and is provided with a second through hole communicated with the first through hole of the guide vane; wherein, the impeller and the guide vane which are mutually matched are provided with openings communicated with the cavity of the pump body.

In the tank-free intelligent jet pump, the cavity of the nozzle is in a cavity shape gradually converging from the water inlet to the water outlet.

In order to enhance the spraying strength of the liquid flowing back to the nozzle through the spray pipe, it is improved that in the tank-less intelligent spray pump, the hollow cavity of the spray pipe is in a cavity shape gradually expanding from the first end to the second end.

As the hydraulic pressure detector structure in the utility model, specifically, the hydraulic pressure detector includes a first holding structure, a second holding structure, an elastic diaphragm, a moving rod, a spring, a magnetic member and a magnetic field strength sensor for connecting a controller;

the first containing structure is provided with a first containing cavity, the second containing structure is provided with a second containing cavity communicated with the first containing cavity, the second containing cavity is communicated with a flow channel of the valve structure through a pump body pressure detection port, the first containing structure and the second containing structure are fastened with each other, the elastic diaphragm is fixed in the second containing cavity and close to the position of the pump body pressure detection port, the communication between the second containing cavity and the flow channel in the valve structure is blocked by the elastic diaphragm, the moving rod is axially movably located in a displacement space formed after the first containing cavity and the second containing cavity are communicated, and the spring acts on the moving rod and enables one end of the moving rod to always keep in contact with the elastic diaphragm; the magnetic part is located the carriage release lever, magnetic field strength inductor and magnetic part mutual isolation set up, the magnetic field strength inductor can respond to the magnetic part and be close to or keep away from this magnetic field strength inductor and the magnetic field that produces changes.

In the tank-free intelligent injection pump, the first accommodating structure is provided with a first cavity formed independently and a second cavity positioned at the top end of the first accommodating structure, and the moving rod is non-rotatably and axially movably positioned in the first cavity of the first accommodating structure; the magnetic part is located at the end part of the moving rod, the magnetic field intensity inductor is located in the second cavity of the first accommodating structure, and the magnetic field intensity inductor is fixed on one side of a displacement space where the magnetic part is located when the magnetic part moves axially.

Still further, no jar intelligent injection pump still includes the fastening cap, fastening cap detachably fastens on the top of first accommodation structure, and the magnetic field intensity inductor is located the space that forms after fastening cap and the fastening of first accommodation structure.

In the tank-free intelligent injection pump, a guide cavity communicated with a first cavity is formed in the first accommodating structure, the guide cavity forms a displacement space when the magnetic part axially moves, and the guide cavity is flat and can limit the rotation of the moving rod; the movable rod is provided with a base part, a rod body part and a guide part which are integrally formed, and the guide part is just matched with the guide cavity, so that the guide part can freely move axially in the guide cavity.

The elastic diaphragm is in a cup-shaped structure with the concave middle part, and the concave part of the elastic diaphragm is positioned below the bottom of the moving rod; or the elastic diaphragm is fixed between the pump body pressure detection port and the displacement space through a limiting structure.

In the tank-free intelligent injection pump, a plurality of ribs extending in the axial direction are annularly arranged on the inner side wall of the first accommodating structure.

Furthermore, the valve structure comprises a shell and a check valve which is positioned in the flow passage and is supported by a spring part to keep closing the trend of the water inlet connecting end of the flow passage, the check valve is provided with a magnet, and a reed pipe which is matched with the magnet and is used for controlling the starting of the motor is arranged in the shell; when the check valve is in a state of closing the water inlet connecting end, the magnet does not sense the reed switch, and the reed switch does not control the motor to work; under the state that the check valve moves along the flowing direction of the fluid and opens the water inlet connecting end, the magnet induces the reed pipe, and the reed pipe controls the motor to be always in a starting state.

Compared with the prior art, the utility model has the advantages of:

firstly, the tank-free intelligent injection pump of the utility model can not only form an injection structure for assisting liquid injection by means of the arranged nozzle and the arranged spray pipe, but also has simple structure and fewer parts of the hydraulic detector additionally arranged in the tank-free intelligent injection pump, so that the hydraulic detector can be conveniently and directly installed on the valve structure of the pump body by the production party of the water pump, and the production efficiency of the water pump is improved;

secondly, aiming at the hydraulic detector, the magnetic field intensity generated by the magnetic part in a displacement space is changed by pushing the movable rod under the action of water flow by virtue of the elastic diaphragm, the magnetic field intensity sensor sends the magnetic field intensity change condition to the controller of the water pump, and the controller accurately calculates the current fluid pressure value in the hydraulic detector according to the magnetic field intensity change condition in the hydraulic detector so as to control the work of the motor and realize the automatic control of the water pump; of course, the magnetic part and the magnetic field intensity sensor in the hydraulic detector are arranged in an isolation mode, so that the magnetic part and the magnetic field intensity sensor are electrically isolated, and the safety of water detection is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a tank-less intelligent jet pump in the embodiment;

FIG. 2 is a cross-sectional view of the tankless intelligent jet pump shown in FIG. 1;

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

FIG. 4 is an enlarged view of the portion B of FIG. 2;

FIG. 5 is an enlarged view of the portion C of FIG. 4;

FIG. 6 is an exploded schematic view of the tankless intelligent jet pump of FIG. 1;

FIG. 7 is an exploded view of the interconnected hydraulic pressure detector and valve structure;

FIG. 8 is a schematic diagram of a hydraulic pressure detector;

FIG. 9 is an exploded view of the hydraulic pressure detector shown in FIG. 8;

fig. 10 is a bottom structure diagram of the first accommodating structure.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 6, this embodiment provides a tank-free intelligent injection pump, this tank-free intelligent injection pump includes the pump body 1, motor 2 and controller, the pump body 1 has cavity 10, water inlet channel 11 and exhalant canal 12, cavity 10 communicates water inlet channel 11 and exhalant canal 12 respectively, be provided with the valve structure 3 of communicating exhalant canal 12 and the hydraulic pressure detector 4 of being connected with valve structure 3 fastening on the pump body 1, valve structure 3 can adopt detachable construction to fix together with hydraulic pressure detector 4 as required, motor 2 and hydraulic pressure detector 4 are connected respectively to the controller, valve structure 3 can be through flange structure fixed mounting on the pump body 1, valve structure 3 can be provided with waterproof sealing ring with the fixed mounting department of the pump body 1, waterproof sealing ring can avoid getting into the water in the runner and take place to reveal. In addition, the chamber 10 of the pump body 1 is provided with:

the nozzle 13 is provided with a cavity 130 and a water inlet 131 and a water outlet 132 which are respectively positioned at two ends of the cavity 130, the cavity 130 is respectively communicated with the water inlet 131 and the water outlet 132, and the caliber size of the water inlet 131 is larger than that of the water outlet 132; the nozzle 13 is shown in the structural aspects of fig. 2, 3 and 6; specifically, the cavity 130 of the nozzle 13 in this embodiment is in a shape of a cavity gradually converging from the water inlet 131 to the water outlet 132, and is substantially in a conical shape;

the spray pipe 14 is provided with a hollow cavity 140, the first end of the hollow cavity 140 is communicated with the water inlet channel 11 of the pump body 1 and is mutually communicated with the water outlet 132 of the nozzle 13, and a gap 5 is formed between the first end of the hollow cavity 140 and the water outlet 132 of the nozzle 13; structure of the nozzle 14 referring to fig. 2 and 3, the hollow cavity 140 of the nozzle 14 in this embodiment is a cavity shape gradually enlarged from the first end toward the second end;

a guide vane 15 disposed adjacent to the second end of the hollow cavity 140, the guide vane 15 having a first through hole 151 communicating with the second end of the hollow cavity 140; wherein the structure of the guide vane 15 is shown in fig. 2 and 6;

an impeller 16 fitted to the guide vane 15, the impeller 16 having a second through hole 161 communicating with the first through hole 151 of the guide vane 15; the matching impeller 16 and guide vane 15 have openings 6 communicating with the chamber 10 of the pump body 1. The structure of the impeller 16 can also be seen in fig. 2 and 6. Of course, the pump body 1 also has a cover 17 to enclose the nozzle 13, the nozzle tube 14, the vanes 15 and the impeller 16 within the cavity 10 of the pump body 1.

Referring to fig. 2, 4, 5, 7, 8 and 9, the hydraulic pressure detector 4 includes a first receiving structure 41, a second receiving structure 42, an elastic diaphragm 43, a moving rod 44, a spring 45, a magnetic member 46 and a magnetic field strength sensor 47 for connecting to a controller, wherein the elastic diaphragm 43 is a rubber diaphragm; the first accommodating structure 41 is provided with a first accommodating cavity 410, the second accommodating structure 42 is provided with a second accommodating cavity 420 communicated with the first accommodating cavity 410, the second accommodating cavity 420 is communicated with the flow channel 30 of the valve structure 3 through a pump body pressure detection port 100, the first accommodating structure 41 and the second accommodating structure 42 are fastened with each other through a thread structure, the elastic diaphragm 43 is fixed in the second accommodating cavity 420 and close to the pump body pressure detection port 100, the communication between the second accommodating cavity 420 and the flow channel 30 in the valve structure 3 is blocked by the elastic diaphragm 43, so that water is prevented from easily entering the second accommodating cavity 420 of the hydraulic pressure detector, the movable rod 44 is axially movably located in a displacement space formed after the first accommodating cavity 410 and the second accommodating cavity 420 are communicated, and the spring 45 acts on the movable rod 44 and enables one end of the movable rod to always keep in contact with the elastic diaphragm 43; the magnetic member 46 is located on the moving rod 44, the magnetic field strength sensor 47 and the magnetic member 46 are arranged in a mutually isolated manner, and the magnetic field strength sensor 47 can sense the magnetic field change generated when the magnetic member approaches or leaves the magnetic field strength sensor. In this embodiment, the magnetic field strength sensor 47 employs a linear hall sensor, and the water in the flow channel 30 of the valve structure 3 can flow into the displacement space formed by the hydraulic pressure detector 4 through the pump body pressure detection port 100.

Specifically, in the embodiment, referring to fig. 5, the first accommodating structure 41 has a first cavity 411 and a second cavity 412 located at the top end of the first accommodating structure 41, and the movable rod 44 is located in the first cavity 411 of the first accommodating structure 41 in a non-rotating and axially movable manner; the magnetic element 46 is located at the end of the moving rod 44, the magnetic field strength sensor 47 is located in the second cavity 412 of the first accommodating structure 41, and the magnetic field strength sensor 47 is fixed at one side of the displacement space where the magnetic element moves axially, so that the magnetic element 46 and the magnetic field strength sensor 47 can be isolated from each other.

In order to make the moving rod move axially more stably in the displacement space formed by the hydraulic pressure detector, as shown in fig. 5, a guide cavity 413 communicated with the first chamber 411 may be formed in the first accommodating structure 41, the guide cavity 413 forms a displacement space when the magnetic member 46 moves axially, and the guide cavity 413 is flat to limit the rotation of the moving rod 44; referring to fig. 7 and 9, the moving rod 44 of this embodiment has a base portion 441, a rod portion 442 and a guide portion 443 formed integrally therewith, and the guide portion 443 is fittingly matched with the guide cavity 413 so that the guide portion 443 is freely axially moved in the guide cavity 413. Thereby, the magnetic member 46 can be moved closer to or farther from the magnetic field strength sensor 47 in accordance with the movement of the moving rod 44, which causes the magnetic field strength in the displacement space to change. Of course, it is also possible to have the body portion 442 of the moving rod 44 in the cavity formed by the spring 45 itself.

The elastic diaphragm 43 in this embodiment is fixed at the pump body pressure detection port close to the valve structure 3 by using a limit structure, that is, the elastic diaphragm 43 is fixed between the pump body pressure detection port and the displacement space by using the limit structure. For example, a groove is provided in the second cavity 420 at a position close to the pump body pressure detection port, and correspondingly, the elastic diaphragm 43 has a projection fitting into the groove. Of course, the groove in the second cavity 420 is a ring-shaped groove, and the protrusion on the elastic membrane 43 is correspondingly a ring-shaped protrusion, so as to enhance the stabilizing effect of the elastic membrane 43 when fixed in the second cavity 420.

In the tankless intelligent spray pump of this embodiment, the elastic diaphragm 43 may be pressed by the end surface of the first receiving structure 41 so that the elastic diaphragm 43 is stably fixed in the second chamber 420. Referring to fig. 9, the elastic diaphragm 43 has a cup-shaped structure with a concave portion, and the concave portion of the elastic diaphragm 43 is located below the bottom of the moving rod 44.

When the elastic diaphragm 43 is impacted by water flow entering the second chamber 420, the concave portion in the middle of the elastic diaphragm 43 bulges towards the right (in a direction away from the elastic diaphragm 43), and the bulged elastic diaphragm 43 pushes the moving rod 44 to move axially towards the right in the formed displacement space, so that the magnetic field intensity generated by the magnetic element 46 in the movement space of the first accommodating structure 41 is changed due to the axial movement of the magnetic element;

when the water flow entering the second chamber 420 is reduced, the impact force of the water flow on the concave part in the middle of the elastic diaphragm 43 is reduced, and the magnetic member 46 is also moved by the axial movement of the moving rod 44 toward the elastic diaphragm 43, thereby again causing the magnetic field intensity generated by the magnetic member 46 in the displacement space to be changed due to the axial movement of the magnetic member; the magnetic field intensity variation generated by the magnetic element 46 along with the water flow in the displacement space is finally transmitted to the controller of the water pump through the magnetic field intensity sensor 47, and the water pressure value in the displacement space formed in the hydraulic pressure detector 4, namely the current water pressure value in the hydraulic pressure detector 4, is calculated by the controller according to the variation of the magnetic field intensity. Specifically, the controller calculates the fluid pressure by the following formula; v _ OUT ═ KX; where V _ OUT represents a fluid pressure value in a displacement space formed in the hydraulic pressure detector 4, K represents an elastic coefficient of the spring 45, and X represents a displacement amount of the spring 45.

In addition, the hydraulic pressure detector 4 in this embodiment may further include a fastening cap 48, the fastening cap 48 may be detachably fastened to the top end of the first accommodating structure 41, and the magnetic field strength sensor 47 is located in a space formed after the fastening cap 48 is fastened to the first accommodating structure 41. For example, the top end of the first receiving structure 41 has a receiving slot for placing the magnetic field strength sensor 47, and then after the magnetic field strength sensor 47 is placed in the receiving slot, the fastening cap 48 is fastened to the top end of the first receiving structure 41, so that the magnetic field strength sensor is located in a space formed by the fastening cap and the first receiving structure after being fastened. The fastening cap 48 may be screwed and fixed to the top end of the first receiving structure 41 by a screw structure. Referring to fig. 7 and 10, a plurality of ribs 414 extending in the axial direction may be annularly disposed on the inner sidewall of the first receiving structure 41 as required.

It should be noted that, referring to fig. 2, 4 and 7, the valve structure 3 of this embodiment includes a housing 31 and a check valve 33 located in the flow passage 30 and supported by a spring member 32 to keep the trend of closing the water inlet connection end of the flow passage 30, the check valve 33 is provided with a magnet 34, and a reed pipe 35 cooperating with the magnet 34 and used for controlling the starting or stopping of the motor 2 is arranged in the housing 31; wherein, under the state that the check valve 33 is in the closed water inlet connection end, the magnet does not induce the reed switch, and the reed switch does not control the motor to work; in a state that the check valve 33 moves in the flow direction of the fluid and opens the water inlet connection end, the magnet 34 senses the reed pipe 35, and the reed pipe 35 controls the motor 2 to be always in a starting state. Of course, the valve structure 3 further comprises a base having a through hole, the base is located between the check valve 33 and the pump body 1, and the through hole on the base is communicated with the water outlet channel 12 of the pump body 1.

Specifically, the magnetic field strength sensor 47 of the hydraulic pressure detector 4 is connected to the controller of the water pump through a wire. Therefore, the magnetic field intensity change condition in the displacement space formed by the hydraulic detector 4 can be sent to the controller through the magnetic field intensity sensor 47, and finally the current water pressure value (or called water pressure value) in the hydraulic detector 4 is calculated by the controller according to the received magnetic field intensity change condition in the displacement space. The hydraulic pressure detector 4 in this embodiment utilizes the magnetic field strength sensor 47 to sense the magnetic field strength change generated by the magnetic member 46 in the displacement space formed by the magnetic member, and does not need to arrange an inductance coil inside the hydraulic pressure detector or draw out the inductance coil to the outside; certainly, because no inductance coil is required to be arranged in the hydraulic detector, the processing and manufacturing difficulty of the hydraulic detector is reduced, and the processing and manufacturing efficiency is improved.

The working principle of the tank-free intelligent jet pump in the embodiment is described as follows:

after the pump body starts to pump water, water flow enters the cavity 10 of the pump body from the water inlet channel 11 of the pump body, a part of water in the cavity 10 flows along the cavity 130 through the water inlet 131 of the nozzle 13, and flows from the outlet 132 of the nozzle 13 into the hollow cavity 140 of the spout 14, since the caliber size of the water inlet 131 of the nozzle 13 is larger than that of the water outlet 132, the water flowing from the nozzle 13 to the spray pipe 14 is in a spraying state, i.e., the jet flow, so that the jet flow outputted from the water outlet 132 of the nozzle 13 and the water flow introduced from the water flow suction port 133 of the nozzle 13 are sucked into the hollow cavity 140 of the spout 14, the jet kinetic energy of the water flow making the secondary injection is formed, thereby increasing the vacuum degree at the water flow suction port 133, improving the suction capacity for the water flow under high vacuum degree, and promoting the suction efficiency of the water flow in the pump body. Of course, another part of water in the chamber 10 enters the valve structure 3 through the water outlet channel 12 of the pump body, then the hydraulic pressure detector 4 detects the current water level condition in the pump body, and then the detected water level is sent to the controller of the intelligent jet pump, so as to make a corresponding processing operation by the controller. For example, when the controller judges that the current water pressure in a displacement space formed by the hydraulic detector is higher than a set value, the controller orders to cut off the power supply of a motor of the water pump, and the motor stops rotating; when the controller judges that the current water body pressure in the pump body is lower than a set value, even if small-flow water flows in the pump body, the controller orders to switch on a power supply of a water pump motor, and the motor starts to rotate.

Although the preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. Can-free intelligent injection pump, including the pump body (1), motor (2) and controller, the pump body (1) has cavity (10), inhalant canal (11) and exhalant canal (12), cavity (10) communicate inhalant canal (11) and exhalant canal (12) respectively, be provided with on the pump body (1) valve structure (3) of intercommunication exhalant canal (12) and with valve structure (3) fastening connection's hydraulic pressure detector (4), motor (2) and hydraulic pressure detector (4) are connected respectively to the controller, a serial communication port, be provided with in cavity (10) of the pump body (1):

the nozzle (13) is provided with a cavity (130) and a water inlet (131) and a water outlet (132) which are respectively positioned at two ends of the cavity (130), the cavity (130) is respectively communicated with the water inlet (131) and the water outlet (132), and the caliber size of the water inlet (131) is larger than that of the water outlet (132);

the spray pipe (14) is provided with a hollow cavity (140), the first end of the hollow cavity (140) is communicated with a water inlet channel (11) of the pump body (1) and is communicated with a water outlet (132) of the nozzle (13), and a gap (5) is formed between the first end of the hollow cavity (140) and the water outlet (132) of the nozzle (13);

the guide vane (15) is arranged close to the second end of the hollow cavity (140), and the guide vane (15) is provided with a first through hole (151) communicated with the second end of the hollow cavity (140);

an impeller (16) that is fitted to the guide vane (15), the impeller (16) having a second through-hole (161) that communicates with the first through-hole (151) of the guide vane (15); wherein, the impeller (16) and the guide vane (15) which are mutually matched are provided with an opening (6) communicated with the cavity (10) of the pump body (1).

2. The tankless intelligent sprayer pump of claim 1, characterized in that the cavity (130) of the nozzle (13) is in the shape of a cavity that gradually converges from the water inlet (131) towards the water outlet (132).

3. The tankless intelligent sprayer pump of claim 2, characterized in that the hollow cavity (140) of the spray bar (14) is of a cavity shape gradually enlarging from the first end towards the second end.

4. The tankless intelligent sprayer pump according to claim 3, characterized in that the hydraulic detector (4) comprises a first housing structure (41), a second housing structure (42), an elastic diaphragm (43), a moving rod (44), a spring (45), a magnetic member (46) and a magnetic field strength sensor (47) for connecting a controller;

the first accommodating structure (41) is provided with a first accommodating cavity (410), the second accommodating structure (42) is provided with a second accommodating cavity (420) communicated with the first accommodating cavity (410), the second accommodating cavity (420) is communicated with the flow channel (30) of the valve structure (3) through a pump body pressure detection port (100), the first containing structure (41) and the second containing structure (42) are mutually fastened, the elastic membrane (43) is fixed in the second containing cavity (420) and is close to the position of the pump body pressure detection port (100), the elastic membrane (43) blocks the communication between the second cavity (420) and the flow passage (30) in the valve structure (3), the moving rod (44) is axially movably positioned in a displacement space formed after the first cavity (410) and the second cavity (420) are communicated, the spring (45) acts on the moving rod (44) and keeps one end of the moving rod always in contact with the elastic diaphragm (43); the magnetic part (46) is arranged on the moving rod (44), the magnetic field intensity inductor (47) and the magnetic part (46) are arranged in an isolated mode, and the magnetic field intensity inductor (47) can induce the magnetic field change generated when the magnetic part is close to or far away from the magnetic field intensity inductor.

5. The tankless intelligent sprayer pump according to claim 4, characterized in that the first housing structure (41) has a first chamber (411) formed separately and a second chamber (412) located at the top end of the first housing structure (41), the moving rod (44) being non-rotatably and axially movably located in the first chamber (411) of the first housing structure (41); the magnetic part (46) is located at the end of the moving rod (44), the magnetic field intensity inductor (47) is located in the second chamber (412) of the first accommodating structure (41), and the magnetic field intensity inductor (47) is fixed on one side of a displacement space where the magnetic part is located when the magnetic part moves axially.

6. The tankless intelligent sprayer pump according to claim 5, further comprising a fastening cap (48), wherein the fastening cap (48) is detachably fastened to the top end of the first containing structure (41), and the magnetic field strength sensor (47) is located in a space formed after the fastening cap (48) is fastened to the first containing structure (41).

7. The intelligent injection pump without the tank as recited in claim 5, wherein a guide cavity (413) communicated with the first chamber (411) is formed in the first accommodating structure (41), the guide cavity (413) forms a displacement space when the magnetic member (46) axially moves, and the guide cavity (413) is flat to limit the rotation of the moving rod; the movable rod (44) is provided with a base part (441), a rod body part (442) and a guide part (443) which are integrally formed, and the guide part (443) is just matched with the guide cavity (413), so that the guide part (443) can freely move axially in the guide cavity (413).

8. The intelligent injection pump without the tank as claimed in any one of claims 4 to 7, wherein the elastic diaphragm (43) is of a cup-shaped structure with a concave middle part, and the concave part of the elastic diaphragm (43) is positioned below the bottom of the moving rod (44); or the elastic diaphragm (43) is fixed between the pump body pressure detection port (100) and the displacement space through a limiting structure.

9. The intelligent injection pump without tank as claimed in any one of claims 4 to 7, wherein the inner side wall of the first housing structure (41) is annularly provided with a plurality of ribs (414) extending along the axial direction.

10. The intelligent injection pump without the tank as claimed in any one of claims 4 to 7, wherein the valve structure (3) comprises a housing (31) and a check valve (33) which is positioned in the flow passage (30) and is supported by a spring member (32) to keep the trend of closing the water inlet connection end of the flow passage (30), a magnet (34) is arranged on the check valve (33), and a reed pipe (35) which is matched with the magnet (34) and is used for controlling the starting or stopping of the motor (2) is arranged in the housing (31); when the check valve (33) is in a state of closing the water inlet connecting end, the magnet does not sense the reed switch, and the reed switch does not control the motor to work; under the state that the check valve (33) moves along the flowing direction of the fluid and opens the water inlet connecting end, the magnet induces the reed pipe, and the reed pipe controls the motor to be always in a starting state.

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