CN111927747B

CN111927747B - Water pump pressure device

Info

Publication number: CN111927747B
Application number: CN202010790288.2A
Authority: CN
Inventors: 叶丹妮
Original assignee: Zheng Juhong
Current assignee: Zheng Juhong
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2022-11-04
Anticipated expiration: 2040-08-07
Also published as: CN111927747A

Abstract

The invention relates to the technical field of water pumps, in particular to a water pump pressure device which comprises a water pump body, wherein a water suction joint is arranged at the lower end of the water pump body, and a water drainage joint is arranged at the upper end of the water pump body; a first vertically through channel is arranged in the drainage joint, and a drainage port matched with the first channel is correspondingly arranged at the upper end of the water pump body; the upper end of the drainage joint is fixedly provided with a connecting block, and a transition cavity communicated with the first channel is arranged in the connecting block; the connecting block upper end is fixed and is provided with the tip and take the screwed drain pipe, be provided with the diaphragm on the connecting block up end, the equipartition has the discharge orifice of crossing of the inside and transition chamber of a plurality of intercommunication drains on the diaphragm. According to the invention, the first channel is completely closed through the baffle, so that the first channel is changed into a relatively sealed space, the problem that the water pump body is damaged due to backflow of water is avoided, and the backflow prevention stability is improved.

Description

Water pump pressure device

Technical Field

The invention relates to the technical field of water pumps, in particular to a water pump pressure device.

Background

A pump is a machine that delivers or pressurizes a liquid. The mechanical energy or other external energy of a prime motor is transmitted to liquid, so that the energy of the liquid is increased, the liquid is mainly used for conveying liquid including water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal and the like, and also can convey liquid, gas mixture and liquid containing suspended solids, and the technical parameters of the performance of the water pump comprise flow, suction lift, shaft power, water power, efficiency and the like; the pump can be divided into a volume water pump, a vane pump and the like according to different working principles.

Chinese patent (application number: 2018218232473) discloses an energy-saving water pump with backflow prevention function, which comprises a pump machine, a base and a backflow prevention plate, wherein the pump machine is fixedly installed on a side panel on the base through a support column, a water inlet is installed on one side of the pump machine, a fixing buckle is welded at the top end of the pump machine, one end, far away from the water inlet, of the pump machine is connected with a water inlet pipe through an inlet flange, one end, far away from the pump machine, of the water inlet pipe is fixedly connected with an L-shaped water collecting tank through a connecting bolt, a one-way valve is fixedly installed at one end, close to a water outlet of the L-shaped water collecting tank, of the water inlet pipe and arranged in the L-shaped water collecting tank, a stop block is arranged on the inner wall of the L-shaped water collecting tank, the bottom of the L-shaped water collecting tank is provided with the backflow prevention plate, a buffer block is connected to one side of the backflow prevention plate, although the problem that the water pump structure damage of the water pump is caused by backflow prevention is realized through the backflow prevention plate, when a power failure or shutdown occurs, water pressure in the pipeline can generate sudden change, a water pressure in the pipeline can generate a sudden change, a water wave of a reverse water flow can generate a water flow in a transmission pipeline, the water impact can directly impact when the water impact can not impact in the connection, the water pump, the water impact can not affect the service life of the water pump, and the water impact can not affect the service life of the water pump, and the water impact can not affect the water pump, and the water impact of the water pump, and the water pump can not affect the water impact.

Therefore, the invention designs the water pump pressure device, the first channel is completely closed through the baffle, so that the first channel is changed into a relatively sealed space, the problem that the water pump body is damaged due to water flow flowing backwards is avoided, and the stability of backflow prevention is improved.

Disclosure of Invention

The invention provides a water pump pressure device, which aims to make up for the defects of the prior art and solve the problem that the service life of a water pump is influenced because the existing water pump is damaged by shock waves of water flowing backwards when the existing water pump is stopped.

The technical scheme adopted by the invention for solving the technical problem is as follows: a water pump pressure device comprises a water pump body, wherein a water suction joint is arranged at the lower end of the water pump body, and a water drainage joint is arranged at the upper end of the water pump body; a first vertically through channel is arranged in the drainage joint, and a drainage port matched with the first channel is correspondingly arranged at the upper end of the water pump body; the upper end of the drainage joint is fixedly provided with a connecting block, and a transition cavity communicated with the first channel is arranged in the connecting block; the upper end of the connecting block is fixedly provided with a drain pipe with threads at the end part, the upper end surface of the connecting block is provided with a transverse plate, and a plurality of overflowing holes communicated with the inside of the drain pipe and the transition cavity are uniformly distributed on the transverse plate; a guide rod capable of moving up and down is arranged in the transition cavity, the upper end of the guide rod penetrates through the transverse plate and extends into the drainage pipe, a guide hole matched with the guide rod is correspondingly arranged on the transverse plate, and the lower end of the guide rod extends into the first channel; the middle part of the guide rod is fixedly provided with a horizontally arranged baffle which is positioned in the transition cavity and is just opposite to the first through hole, the outer diameter of the baffle is larger than the inner diameter of the first channel, and a first spring is arranged between the baffle and the transverse plate.

When the water pump is used, the baffle can be pressed at the upper end of the first channel at the initial starting stage of the water pump body through the arrangement of the first spring, so that water flow in the first channel is blocked, back pressure is formed in the first channel, instantaneous pulses in the first channel are reduced in the whole starting and running processes of the water pump body, the impact strength of the water pump body during starting and running is reduced, and the service life is prolonged; then the water flow in the first channel overcomes the elastic force Ding Kai baffle of the first spring, and passes through the transition cavity, the overflowing hole and the drain pipe in sequence and then enters the external water consumption equipment; when the water pump body is stopped or power is cut off, the water flow flowing backwards firstly enters the transition cavity after being dispersed and decompressed through the overflowing holes, the water stored in the transition cavity blocks the water to further reduce impact and then acts on the baffle plate, the baffle plate moves towards the upper end of the first channel under the combined action of the first spring and the water flow until the baffle plate completely closes the first channel, so that the first channel is changed into a relatively sealed space, and the problem that the water pump body is damaged due to the water flow flowing backwards is avoided; because the acting force direction of the water flow on the baffle is consistent with the rebound force direction of the spring when the water flow flows backwards, the baffle can plug the first channel in time, the problem that the baffle cannot be closed can not occur, and the stability of backflow prevention is improved.

Preferably, a floater with a matched size is arranged in the first channel, and the floater is sleeved outside the guide rod and can freely move up and down; a limiting block is arranged on the lower portion in the first channel, and a through hole which is communicated up and down is formed in the limiting block. The baffle can play a role in buffering when moving downwards through the buoyancy of the floater and the self compression deformation, so that collision damage caused by too high speed of the baffle is avoided; in addition, the floater can also block the upper first through hole in advance, so that the problem that the water pump body is damaged due to backward flowing of water flow is better solved.

Preferably, a plurality of vertical overflowing holes which are communicated up and down are formed in the floater, a horizontal overflowing hole communicated with the vertical overflowing holes is formed in the upper end of the floater, and the horizontal overflowing hole extends to the edge of the upper end of the floater. Because when rivers flow backward, the baffle moves down, the float gets into first passageway and continues to push down, although float self pressurized deformation can slow down the pressure to the water in the first passageway, but still can make the water pressurized in the first passageway and then make and have the part to water pump body pressure pulse, consequently can discharge the water in the first passageway when the float moves down through the setting in the horizontal discharge orifice of vertical discharge orifice intercommunication, further reduce water pump body pressure pulse, avoid water pump body pressurized damage.

Preferably, a transition ring is arranged at the bottom of the transition cavity, the transition ring is positioned between the stop block and the first channel, a guide cavity is formed by the space inside the stop block, and the inner diameter of the guide cavity is the same as that of the first channel; and a second through hole for communicating the guide cavity and the transition cavity is formed in the transition ring, and a one-way valve which is communicated from the guide cavity to the transition cavity in a one-way mode is arranged in the second through hole. Through the arrangement of the transition ring, when the flow and the pressure are low at the initial starting stage of the water pump body, water flow can sequentially pass through the vertical overflowing hole, the horizontal overflowing hole, the guide cavity and the second through hole to enter the transition cavity, at the moment, the baffle is not pressed and is not opened, and then the baffle is opened along with the increase of the flow and the pressure of the water flow to realize normal water flow conveying, so that the pulse of the baffle when the baffle is opened is low, the service life of the baffle is prolonged, the vibration and the noise are reduced, and under the shunting action of the second through hole, the impact directly acting on the baffle is reduced, and the service life of the baffle is further prolonged; realize not influencing under the circumstances that the second passageway shunted when the water pump body starts through the check valve, avoid getting into first passageway from the second passageway when the water pump body stops or has a power failure the rivers that flow backwards, and then effectual protection water pump body avoids the impact damage.

Preferably, a sinking groove is formed in the outer side of the drainage connector, a magnetic sensitive switch is arranged in the sinking groove, a magnetic block is arranged in the floater and close to one side of the magnetic sensitive switch, and the magnetic block is vertically arranged in a long strip shape. Through the setting of magnetic-sensing switch and magnetic path, when the water equipment is closed, the water pump body is still when operation, the water pressure in the first passageway can constantly rise, under hydraulic effect, first spring is compressed, the baffle shifts up, at this moment, the float drives the magnetic path and also correspondingly shifts up, after moving up to a take the altitude, float and magnetic-sensing switch dislocation, the disconnection of magnetic-sensing switch, control water pump body stop work, no longer continue to supply water, realize the automatic stop of water pump body when the water equipment is closed, avoid continuing the pressure boost and lead to water pump body to damage.

Preferably, be provided with horizontal recess on the downthehole wall that overflows, set up the dog in the recess, dog one end is passed through second spring and recess bottom intercommunication, the dog other end extends to and overflows downthehole and its downside and is provided with the inclined plane. Through the setting of the dog on taking the inclined plane, can have a component to the recess inboard to the dog at normal during operation flowing water, and then make the dog retract in the recess, do not influence normal rivers and carry, and when the water pump body stopped rivers and flows backward, the dog stretches out, delays to hinder rivers and passes through from the discharge orifice, and then reaches the pressure shock that reduces the water flow that flows backward, increase of service life.

The invention has the following beneficial effects:

1. according to the water pump pressure device, the first channel is completely closed through the baffle, so that the first channel is changed into a relatively sealed space, the problem that a water pump body is damaged due to water flow flowing backwards is solved, and the stability of backflow prevention is improved.

2. According to the water pump pressure device, the magnetic sensitive switch and the magnetic block are disconnected, the water pump body is controlled to stop working, water supply is not continued, the water pump body is automatically stopped when water utilization equipment is closed, and the water pump body is prevented from being damaged due to continuous pressurization.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of a drain fitting according to the present invention;

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

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

FIG. 5 is a schematic view of the cross plate of the present invention;

in the figure:

1. a water pump body; 11. a water outlet; 2. a water discharge joint; 21. a first channel; 22. a limiting plate; 23. a through-flow aperture; 24. sinking a groove; 25. a magnetic sensitive switch; 26. a float; 27. a vertical overflowing hole; 28. a horizontal overflowing hole; 29. a magnetic block; 3. connecting blocks; 31. a transition chamber; 32. a guide bar; 33. a baffle plate; 34. a first spring; 35. a transverse plate; 36. an overflowing hole; 37. a guide hole; 38. a stopper; 39. a second spring; 4. a drain pipe; 41. a thread; 5. a water suction joint; 6. a transition ring; 61. a guide chamber; 62. a second through hole; 63. a one-way valve.

Detailed Description

The present invention will be further described with reference to the following detailed description so that the technical means, the creation features, the achievement purposes and the effects of the present invention can be easily understood.

As shown in fig. 1 to 5, a water pump pressure device comprises a water pump body 1, wherein a water suction connector 5 is arranged at the lower end of the water pump body 1, and a water discharge connector 2 is arranged at the upper end of the water pump body 1; a first channel 21 which is vertically penetrated is arranged in the drainage joint 2, and a drainage port 11 matched with the first channel 21 is correspondingly arranged at the upper end of the water pump body 1; the upper end of the drainage joint 2 is fixedly provided with a connecting block 3, and a transition cavity 31 communicated with the first channel 21 is arranged in the connecting block 3; the upper end of the connecting block 3 is fixedly provided with a drain pipe 4 with a thread 41 at the end part, the upper end surface of the connecting block 3 is provided with a transverse plate 35, and a plurality of overflowing holes 36 communicated with the inside of the drain pipe 4 and the transition cavity 31 are uniformly distributed on the transverse plate 35; a guide rod 32 capable of moving up and down is arranged in the transition cavity 31, the upper end of the guide rod 32 penetrates through a transverse plate 35 and extends into the water discharge pipe 4, a guide hole 37 matched with the guide rod 32 is correspondingly arranged on the transverse plate 35, and the lower end of the guide rod 32 extends into the first channel 21; the middle part of the guide rod 32 is fixedly provided with a baffle 33 which is horizontally arranged, the baffle 33 is positioned in the transition cavity 31 and just arranged opposite to the first through hole, the outer diameter of the baffle 33 is larger than the inner diameter of the first channel 21, and a first spring 34 is arranged between the baffle 33 and the transverse plate 35.

When the water pump is used, the baffle 33 can be pressed at the upper end of the first channel 21 at the initial starting stage of the water pump body 1 through the arrangement of the first spring 34, so that water flow in the first channel 21 is blocked, back pressure is formed in the first channel 21, instantaneous pulses in the first channel 21 are reduced in the whole starting and running processes of the water pump body 1, the impact strength of the water pump body 1 during starting and running is reduced, and the service life is prolonged; then the water flow in the first channel 21 overcomes the elastic force Ding Kai baffle 33 of the first spring 34 and passes through the transition cavity 31, the overflowing hole 36 and the water discharge pipe 4 in sequence and then enters the external water consumption equipment; when the water pump body 1 is stopped or power is cut off, the water flow flowing backwards firstly enters the transition cavity 31 after being dispersed and decompressed through the overflowing holes 36, the water stored in the transition cavity 31 blocks the water to further reduce the impact and then acts on the baffle 33, the baffle 33 moves towards the upper end of the first channel 21 under the combined action of the first spring 34 and the water flow until the baffle 33 completely closes the first channel 21, so that the first channel 21 becomes a relatively sealed space, and the problem that the water pump body 1 is damaged due to the water flow flowing backwards is avoided; because the acting force direction of the water flow on the baffle 33 is consistent with the rebounding force direction of the spring when the water flow flows backward, the baffle 33 can plug the first channel 21 in time, the problem that the baffle 33 cannot be closed can not be caused, and the backward flow prevention stability is improved.

As an embodiment of the present invention, a float 26 with a matched size is arranged in the first channel 21, and the float 26 is sleeved outside the guide rod 32 and can freely move up and down; the lower part in the first channel 21 is provided with a limiting block 22, and the limiting block 22 is provided with a through hole 23 which is communicated up and down. The baffle 33 can play a role in buffering when moving downwards through the buoyancy of the floater 26 and the self compression deformation, so that collision damage caused by the over-high speed of the baffle 33 is avoided; in addition, the floater 26 can also block the first through hole in advance, so that the problem that the water pump body 1 is damaged due to water flow flowing backwards is better solved.

In one embodiment of the present invention, a plurality of vertical overflowing holes 27 are formed in the float 26 to penetrate up and down, a horizontal overflowing hole 28 communicated with the vertical overflowing holes 27 is formed at the upper end of the float 26, and the horizontal overflowing hole 28 extends to the edge of the upper end of the float 26. Because when rivers flow backward, baffle 33 moves down, float 26 gets into first passageway 21 and continues to push down, although float 26 self pressurized deformation can slow down the pressure to the water in first passageway 21, still can make the water pressurized in first passageway 21 and then make and have the part to water pump body 1 pressure pulse, consequently the setting through the horizontal discharge hole 28 of crossing of vertical discharge hole 27 intercommunication can be discharged the water in first passageway 21 when float 26 moves down, further reduce water pump body 1 pressure pulse, avoid water pump body 1 to receive the pressure damage.

As an embodiment of the present invention, a transition ring 6 is disposed at the bottom of the transition cavity 31, the transition ring 6 is located between the stopper 38 and the first channel 21, the space inside the stopper 38 forms a guide cavity 61, and the inner diameter of the guide cavity 61 is the same as the inner diameter of the first channel 21; a second through hole 62 communicating the guide cavity 61 and the transition cavity 31 is arranged in the transition ring 6, and a one-way valve 63 conducting from the guide cavity 61 to the transition cavity 31 in one way is arranged in the second through hole 62. Through the arrangement of the transition ring 6, when the flow and the pressure at the initial stage of starting the water pump body 1 are small, water flow can sequentially pass through the vertical overflowing hole 27, the horizontal overflowing hole 28, the guide cavity 61 and the second through hole 62 to enter the transition cavity 31, at the moment, the baffle 33 is not pressed and is not opened, then the baffle 33 is opened along with the increase of the flow and the pressure of the water flow to realize normal water flow conveying, so that the pulse of the baffle 33 is small when the baffle 33 is opened, the service life of the baffle 33 is prolonged, vibration and noise are reduced, and under the shunting action of the second through hole 62, the impact directly acting on the baffle 33 is reduced, and the service life of the baffle 33 is further prolonged; realize not influencing the second passageway through check valve 63 and under the circumstances of reposition of redundant personnel when water pump body 1 starts, avoid getting into first passageway 21 from the second passageway when water pump body 1 stops or cuts off the power supply the rivers that flow backward, and then effectual protection water pump body 1 avoids the impact damage.

In one embodiment of the present invention, a sunken groove 24 is provided outside the drainage connector 2, a magnetic sensitive switch 25 is provided in the sunken groove 24, a magnetic block 29 is provided in the float 26 on a side close to the magnetic sensitive switch 25, and the magnetic block 29 is in a vertically arranged strip shape. Through the setting of magnetic-sensing switch 25 and magnetic path 29, close when water equipment, water pump body 1 is still when the operation, the water pressure in first passageway 21 can constantly rise, under hydraulic effect, first spring 34 is compressed, baffle 33 moves up, at this moment, float 26 drives magnetic path 29 and also correspondingly shifts up, after moving up to a take the altitude, float 26 misplaces with magnetic-sensing switch 25, magnetic-sensing switch 25 disconnects, control water pump body 1 stop work, no longer continue to supply water, realize the automatic shutdown of water pump body 1 when water equipment closes, avoid continuing the pressure boost and lead to water pump body 1 to damage.

In one embodiment of the present invention, a transverse groove is formed on the inner wall of the flow hole 36, a stopper 38 is disposed in the groove, one end of the stopper 38 is communicated with the bottom of the groove through a second spring 39, the other end of the stopper 38 extends into the flow hole 36, and an inclined surface is disposed at the lower side of the stopper. Through the setting of the dog 38 of taking the inclined plane, can have a component to the recess inboard to dog 38 when normal work, and then make dog 38 retract in the recess, do not influence normal rivers and carry, and when water pump body 1 stopped rivers and flows backward, dog 38 stretches out, delay and hinder rivers and pass through from discharge orifice 36, and then reach the pressure shock that reduces the water flow that flows backward, increase of service life.

When the water pump is used, the baffle 33 can be pressed at the upper end of the first channel 21 at the initial starting stage of the water pump body 1 through the arrangement of the first spring 34, so that water flow in the first channel 21 is blocked, back pressure is formed in the first channel 21, instantaneous pulses in the first channel 21 are reduced in the whole starting and running processes of the water pump body 1, the impact strength of the water pump body 1 during starting and running is reduced, and the service life is prolonged; then the water flow in the first channel 21 overcomes the elastic force Ding Kai baffle 33 of the first spring 34 and passes through the transition cavity 31, the overflowing hole 36 and the water discharge pipe 4 in sequence and then enters the external water consumption equipment; when the water pump body 1 is stopped or power is cut off, the water flow flowing backwards firstly enters the transition cavity 31 after being dispersed and decompressed through the overflowing hole 36, the water flow is blocked by the water stored in the transition cavity 31 to further reduce the impact and then acts on the baffle 33, the baffle 33 moves towards the upper end of the first channel 21 under the combined action of the first spring 34 and the water flow until the baffle 33 completely closes the first channel 21, so that the first channel 21 becomes a relatively sealed space, and the problem that the water pump body 1 is damaged due to the water flow flowing backwards is avoided; because the acting force direction of the water flow on the baffle 33 is consistent with the rebounding force direction of the spring when the water flow flows backward, the baffle 33 can block the first channel 21 in time, the problem that the baffle 33 cannot be closed is avoided, and the backward flow prevention stability is improved; the baffle 33 can play a role in buffering when moving downwards through the buoyancy of the floater 26 and the self compression deformation, so that collision damage caused by the over-high speed of the baffle 33 is avoided; in addition, the floater 26 can also block the first through hole in advance, so that the problem that the water pump body 1 is damaged due to water flow backward is better avoided; because when water flows backward, the baffle 33 moves downwards, the floater 26 enters the first channel 21 and continues to press downwards, although the pressure deformation of the floater 26 per se can relieve the pressure on the water in the first channel 21, the water in the first channel 21 is pressed, and then part of pressure pulse on the water pump body 1 exists, so that the water in the first channel 21 can be discharged when the floater 26 moves downwards through the arrangement of the horizontal overflowing holes 28 communicated with the vertical overflowing holes 27, the pressure pulse on the water pump body 1 is further reduced, and the water pump body 1 is prevented from being damaged by pressure; through the arrangement of the transition ring 6, when the initial flow and pressure of the water pump body 1 are small, water flow can sequentially pass through the vertical through-flow hole 27, the horizontal through-flow hole 28, the guide cavity 61 and the second through-hole 62 to enter the transition cavity 31, at the moment, the baffle 33 is not pressed and is not opened, then the baffle 33 is opened along with the increase of the flow and the pressure of the water flow to realize normal water flow conveying, so that the pulse of the baffle 33 is small when the baffle 33 is opened, the service life of the baffle 33 is prolonged, vibration and noise are reduced, and under the shunting action of the second through-hole 62, the impact directly acting on the baffle 33 is reduced, and the service life of the baffle 33 is further prolonged; the one-way valve 63 is used for preventing water flow flowing backwards when the water pump body 1 is stopped or power is cut from entering the first channel 21 from the second channel under the condition that the diversion of the second channel when the water pump body 1 is started is not influenced, so that the water pump body 1 is effectively protected from being damaged by impact; through the arrangement of the magnetic sensitive switch 25 and the magnetic block 29, when the water using equipment is closed and the water pump body 1 is still running, the water pressure in the first passage 21 can be continuously raised, the first spring 34 is compressed under the action of the water pressure, the baffle 33 moves upwards, at the moment, the floater 26 drives the magnetic block 29 to correspondingly move upwards, and after the water pump body moves upwards to a certain height, the floater 26 is dislocated with the magnetic sensitive switch 25, the magnetic sensitive switch 25 is disconnected, the water pump body 1 is controlled to stop working, water supply is not continued any more, automatic stop of the water pump body 1 when the water using equipment is closed is realized, and damage to the water pump body 1 caused by continuous pressurization is avoided; through the setting of the dog 38 of taking the inclined plane, can have a component to the recess inboard to dog 38 when normal work, and then make dog 38 retract in the recess, do not influence normal rivers and carry, and when water pump body 1 stopped rivers and flows backward, dog 38 stretches out, delay and hinder rivers and pass through from discharge orifice 36, and then reach the pressure shock that reduces the water flow that flows backward, increase of service life.

The foregoing shows and describes the general principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The water pump pressure device is characterized by comprising a water pump body (1), wherein a water suction joint (5) is arranged at the lower end of the water pump body (1), and a water drainage joint (2) is arranged at the upper end of the water pump body (1); a first channel (21) which is vertically communicated is arranged in the water drainage joint (2), and a water drainage port (11) matched with the first channel (21) is correspondingly arranged at the upper end of the water pump body (1); a connecting block (3) is fixedly arranged at the upper end of the drainage joint (2), and a transition cavity (31) communicated with the first channel (21) is arranged in the connecting block (3); the upper end of the connecting block (3) is fixedly provided with a drain pipe (4) with a thread (41) at the end part, the upper end surface of the connecting block (3) is provided with a transverse plate (35), and a plurality of overflowing holes (36) communicated with the inside of the drain pipe (4) and the transition cavity (31) are uniformly distributed in the transverse plate (35); a guide rod (32) capable of moving up and down is arranged in the transition cavity (31), the upper end of the guide rod (32) penetrates through a transverse plate (35) and extends into the drain pipe (4), a guide hole (37) matched with the guide rod (32) is correspondingly arranged on the transverse plate (35), and the lower end of the guide rod (32) extends into the first channel (21); a horizontally arranged baffle (33) is fixedly arranged in the middle of the guide rod (32), the baffle (33) is positioned in the transition cavity (31) and is arranged right opposite to the first through hole, the outer diameter of the baffle (33) is larger than the inner diameter of the first channel (21), and a first spring (34) is arranged between the baffle (33) and the transverse plate (35);

a floater (26) with the size matched with that of the first channel (21) is arranged in the first channel (21), and the floater (26) is sleeved outside the guide rod (32) and can freely move up and down; a limiting block (22) is arranged at the inner lower part of the first channel (21), and a through hole (23) which is communicated up and down is arranged on the limiting block (22);

be provided with a plurality of vertical overflowing hole (27) that link up from top to bottom in float (26), float (26) upper end is provided with the horizontal overflowing hole (28) with vertical overflowing hole (27) intercommunication, horizontal overflowing hole (28) extend to float (26) upper end edge.

2. A water pump pressure device according to claim 1, characterized in that the transition chamber (31) is provided with a transition ring (6) at the bottom, the transition ring (6) is positioned between the baffle (33) and the first channel (21), the space inside the baffle (33) forms a guide chamber (61), and the inner diameter of the guide chamber (61) is the same as the inner diameter of the first channel (21); a second through hole (62) communicated with the guide cavity (61) and the transition cavity (31) is formed in the transition ring (6), and a one-way valve (63) communicated with the transition cavity (31) in a one-way mode from the guide cavity (61) is arranged in the second through hole (62).

3. A water pump pressure device according to claim 2, characterized in that a sunken groove (24) is arranged on the outer side of the water discharge connector (2), a magnetic sensitive switch (25) is arranged in the sunken groove (24), a magnetic block (29) is arranged on one side of the floater (26) close to the magnetic sensitive switch (25), and the magnetic block (29) is in a vertically arranged strip shape.

4. A water pump pressure device according to claim 3, characterized in that the inner wall of the overflowing hole (36) is provided with a transverse groove, a stop block (38) is arranged in the groove, one end of the stop block (38) is communicated with the bottom of the groove through a second spring (39), the other end of the stop block (38) extends into the overflowing hole (36), and the lower side of the stop block is provided with an inclined surface.