CN215409161U - Flow control pump with hedging structure - Google Patents

Abstract

The utility model discloses a flow control pump with a hedging structure, which comprises a pump body, wherein a first water inlet cavity, a second water inlet cavity, a pressurizing cavity and a water outlet cavity are arranged in the pump body, the first water inlet cavity and the water outlet cavity are respectively communicated with a water inlet and a water outlet, a negative pressure valve seat is arranged on the pump body, a vacuum cavity is arranged in the negative pressure valve seat, the vacuum cavity is communicated with the second water inlet cavity, the second water inlet cavity is communicated with the pressurizing cavity, the pressurizing cavity is communicated with the water outlet cavity, a water path for communicating the first water inlet cavity with the vacuum cavity is provided with a flow control assembly, the flow control assembly comprises a control rod and a pressure sensing piece, the control rod penetrates through the pressure sensing piece to extend upwards and downwards to form a first control rod and a second control rod respectively, the area of the top end of the first control rod sensing water pressure is the same as the area of the bottom end of the second control rod sensing water pressure, a first water inlet flow channel penetrating through the middle of the control rod is arranged, and the first water inlet flow channel is communicated with a first water inlet cavity. The utility model reduces the blocking influence of the water pressure on the control rod, thereby enabling the flow control pump to be started more smoothly.

Description

Flow control pump with hedging structure

Technical Field

The utility model relates to the technical field of fluid transportation, in particular to a flow control pump with a hedging structure.

Background

The water supply pump is used as an important device for doing work on fluid in the fluid conveying process, and is widely applied to the existing industrial production and human life.

When the existing water dispenser uses a water supply pump, a normal pressure water tank is usually arranged, and the water supply pump pumps water from the normal pressure water tank and supplies water to a heating unit. When a water dispenser system is not provided with a normal-pressure water tank and a pressure water source is used for supplying water to a heating unit instead, the function of a water supply pump is insufficient, so that a water supply pump in the water dispenser industry needs to be added with a stopping function and a flow adjusting function, the water supply pump adjusts the flow of the water supply pump by up-down movement of a control rod under the actions of atmospheric pressure, negative pressure, a spring and the like, but the control rod in the existing water supply pump is a solid part, so that when the existing water supply pump works, source water can generate resistance on the end part of the control rod, particularly the pressure water source has larger resistance, the movement of the control rod is influenced, the opening of the water supply pump is blocked, the response is slow, and the water supply is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a flow control pump with a hedging structure, which is used for reducing the blocking influence of a non-pressure or pressure water source on a control rod, so that the flow control pump is started more smoothly and responds more quickly, and the flow control pump is more favorable for supplying water for a water dispenser.

In order to solve the technical problem, the utility model adopts the following scheme:

a flow control pump with an opposite flushing structure comprises a pump body, wherein a first water inlet cavity, a second water inlet cavity, a pressurizing cavity and a water outlet cavity are arranged in the pump body, the first water inlet cavity and the water outlet cavity are respectively communicated with a water inlet and a water outlet, a negative pressure valve seat is hermetically connected to the pump body, a vacuum cavity is arranged in the negative pressure valve seat, a water path between the vacuum cavity and the second water inlet cavity is communicated, the second water inlet cavity is communicated with the pressurizing cavity through a water inlet one-way structure, the pressurizing cavity is communicated with the water outlet cavity through a water outlet one-way structure, a flow control assembly for controlling the on-off of water flow is arranged on the water path for communicating the first water inlet cavity with the vacuum cavity, the flow control assembly comprises a control rod and a pressure sensing part, the control rod penetrates through the pressure sensing part to extend upwards and downwards to respectively form a first control rod and a second control rod, the area of the top end of the first control rod is the same as the area of the bottom end of the second control rod, the middle part of the control rod is provided with a first water inlet flow channel which penetrates through the control rod, and the first water inlet flow channel is communicated with the first water inlet cavity.

Compared with the prior art, when the flow control pump does not work, the flow control assembly controls the waterway seal between the vacuum cavity and the first water inlet cavity, when the flow control pump works, water flow or air in the vacuum cavity is sucked away to form a certain vacuum degree, at the moment, the flow control assembly controls the waterway conduction between the first water inlet cavity and the vacuum cavity, the conducted flow is related to the vacuum degree in the vacuum cavity, the higher the vacuum degree is, the larger the conducted flow is, the smaller the vacuum degree is, the smaller the conducted flow is, the working voltage (power) of the water supply pump is adjusted to adjust the vacuum degree in the vacuum cavity when the water supply pump works, and the output flow of the flow control pump during working can be adjusted by adjusting the working voltage (power) of the water supply pump. The control lever among the current accuse stream pump is solid construction, the lower extreme of control lever is located intake antrum top position, the water source gets into the intake antrum after the water inlet, the motor rotates simultaneously and drives the pressure boost chamber and extrude, make the vacuum change in the vacuum chamber, thereby make the control lever reciprocate, the source water of intake intracavity this moment can have an ascending hindrance to the terminal surface of control lever, resistance increase when the control lever moves down like this, especially when having the pressure water source, the resistance is more obvious, the pump water work is just difficult to open to the accuse stream pump of appearance. In this scheme, set up the first runner of intaking that runs through in control lever middle part position, the source water that enters into the intake antrum by the water inlet can reach the both ends of control lever, water pressure can both be experienced at the control lever both ends like this, water pressure can both be experienced to the lower section of the up end of first control lever and second control lever promptly, and water pressure is close the same, and the area that water pressure was experienced at first control lever top and second control lever bottom is the same, the pressure of source water to first control lever up end is close the same with the pressure to terminal surface under the second control lever like this, but the direction of pressure is opposite, the pressure of source water to first control lever and second control lever just can offset each other like this, make source water can not produce too big resistance to the control lever, just so avoid the influence of water pressure to the control lever, make accuse flow pump can normally open.

Preferably, the flow control assembly further comprises a return spring, the pressure sensing piece is a pressure sensing plate, the pressure sensing plate is located in the vacuum cavity, the side wall of the pressure sensing plate is in sliding connection with the side wall of the vacuum cavity through a first sealing ring, one end of the return spring acts on the bottom surface of the pressure sensing plate, the other end of the return spring acts on the bottom wall of the vacuum cavity, an atmosphere cavity is formed between the pressure sensing plate and the valve cover, and the valve cover is provided with an atmosphere hole; the water inlet is arranged in the middle of the valve cover and communicated with the first water inlet flow channel, the bottom surface of the valve cover is provided with a sliding cavity which is used for the first control rod to slide up and down and communicated with the water inlet, a second sealing ring is compressed between the first control rod and the sliding cavity, the side wall of the second control rod is provided with a flow limiting groove which is positioned below the pressure sensing plate, a third sealing ring is compressed between the lower end of the second control rod and the inner wall of the pump head body, and the second control rod forms a flow control assembly for controlling the on-off of a water path between the first water inlet cavity and the vacuum cavity under the combined action of air pressure in the atmospheric cavity, pressure in the vacuum cavity and a reset spring.

Preferably, the pressure sensing piece is an induction diaphragm, the induction diaphragm is circumferentially compressed and sealed between the valve cover and the negative pressure valve seat, the middle part of the induction diaphragm is compressed on the supporting plate through the diaphragm pressing plate, and the supporting plate is arranged in the circumferential direction of the middle section of the control rod.

Preferably, a pressing lantern ring for pressing the second sealing ring is arranged in the sliding cavity. The size that compresses tightly the lantern ring and slide the chamber matches, compresses tightly the lantern ring cup joint in the slide chamber, compresses tightly the second sealing washer fixedly, avoids first control lever when sliding from top to bottom, and the second sealing washer can not follow the slip, guarantees the sealing performance of second sealing washer to between first control lever and the slide intracavity wall for the rivers of water inlet can not leak the atmosphere intracavity.

Preferably, the vacuum cavity is communicated with the second water inlet cavity sequentially through a water inlet groove and a second water inlet flow channel, the water inlet groove is formed by the inner wall of the negative pressure valve seat and the inner wall of the pump head body, and the second water inlet flow channel is arranged in the pump head body.

Preferably, the one-way structure of intaking includes the one-way diaphragm of intaking and inlet opening, and the one-way diaphragm circumference of intaking covers the inlet opening, and the inlet opening setting is internal at the pump head. The water inlet one-way diaphragm enables water flow to the pressurizing cavity only from the second water inlet cavity, and backflow cannot occur.

Preferably, the one-way structure of going out water includes a one-way diaphragm of going out water and apopore, and the one-way diaphragm of going out water covers the apopore in circumference, and the apopore setting is in the pump head body. The water outlet one-way diaphragm enables water flow to the water outlet cavity only from the pressurizing cavity without backflow.

Preferably, the water outlet is vertically arranged, the water outlet is communicated with the water outlet cavity through a water outlet flow channel, and the water outlet flow channel is formed by the side plate and the pump head body. The water outlet is parallel to the direction of the motor output shaft of the flow control pump, so that the cross-sectional area of the whole pump is reduced conveniently, and the manufacturing process is convenient to realize.

Preferably, a fourth sealing ring is sleeved on the side plate and is tightly pressed between the pump head body and the side plate. The fourth sealing ring enhances the sealing performance between the side plate and the pump body, and avoids the water leakage phenomenon between the side plate and the pump head body.

Preferably, the water inlet is arranged on the side surface of the pump head body.

The utility model has the following beneficial effects:

1. the two ends of the control rod can feel water pressure, namely the upper end face of the first control rod and the lower section of the second control rod can feel the water pressure, the water pressure is the same, the area of the top end of the first control rod which feels the water pressure is the same as the area of the bottom end of the second control rod which feels the water pressure, so that the pressure of source water on the upper end face of the first control rod is the same as the pressure of source water on the lower end face of the second control rod, but the directions of the pressures are opposite, so that the pressures of the source water on the first control rod and the second control rod can be mutually offset, the source water cannot generate overlarge resistance on the control rods, the influence of the water pressure on the control rods is avoided, and the flow control pump can be normally opened.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of embodiment 3;

FIG. 3 is a schematic structural view of example 6;

FIG. 4 is a schematic structural view of example 7.

Reference numerals: 01-a water inlet, 02-a first water inlet flow passage, 03-a valve cover, 04-an atmospheric hole, 05-a lower end of the valve cover, 06-a first sealing ring, 07-a flow limiting groove, 08-a second control rod, 09-a third sealing ring, 10-a pump head body, 11-a side plate, 12-a second water inlet cavity, 13-a water inlet hole, 14-a water outlet, 15-a motor, 16-a first water inlet cavity, 17-a second water inlet flow passage, 18-a fifth sealing ring, 19-a water inlet groove, 20-a negative pressure valve seat, 21-a return spring, 22-a vacuum cavity, 23-a pressure sensing plate, 24-an atmospheric cavity, 25-a pressing lantern ring, 26-a second sealing ring, 27-a first control rod, 28-a diaphragm pressing plate, 29-a fourth sealing ring, 30-water outlet flow channel, 31-water inlet one-way diaphragm, 32-water outlet hole, 33-pressurizing cavity, 34-water outlet one-way diaphragm, 35-water outlet cavity, 36-sensing diaphragm, 37-sliding cavity and 38-supporting plate.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "open," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in figure 1, a flow control pump with a hedging structure comprises a pump body 10, a first water inlet cavity 16, a second water inlet cavity 12, a pressurizing cavity 33 and a water outlet cavity 35 are arranged in the pump body 10, the first water inlet cavity 16 and the water outlet cavity 35 are respectively communicated with a water inlet 01 and a water outlet 14, a negative pressure valve seat 20 is hermetically connected to the pump body 10, a vacuum cavity 22 is arranged in the negative pressure valve seat 20, the vacuum cavity 22 is communicated with the second water inlet cavity 12 through a water inlet groove 19 and a second water inlet flow channel 17 in sequence, the water inlet groove 19 is formed by the inner wall of the negative pressure valve seat 20 and the inner wall of the pump body 10, the second water inlet flow channel 17 is arranged in the pump body 10, the second water inlet cavity 12 is communicated with the pressurizing cavity 33 through a water inlet one-way structure, the pressurizing cavity 33 is communicated with the water outlet cavity 35 through a water outlet one-way structure, a water channel through which the first water inlet cavity 16 is communicated with the vacuum cavity 22 is provided with a flow control component for controlling the on-off of water flow, the flow control assembly comprises a control rod and a pressure sensing piece, the control rod penetrates through the pressure sensing piece to extend upwards and downwards to form a first control rod 27 and a second control rod 08 respectively, the area of the top end of the first control rod 27 sensing water pressure is the same as the area of the bottom end of the second control rod 08 sensing water pressure, a first water inlet flow channel 02 penetrating through the middle of the control rod is arranged, and the first water inlet flow channel 02 is communicated with the first water inlet cavity 16.

The flow control pump of the embodiment is suitable for a pressure or non-pressure water source, when the flow control pump does not work, the flow control assembly controls a water path between the vacuum cavity 22 and the first water inlet cavity 16 to be sealed, when the flow control pump works, an output shaft of the motor 15 rotates and extrudes the pressurizing cavity 33 through an eccentric part and other components, so that water flow or air in the vacuum cavity 22 is sucked away to form a certain vacuum degree, at the moment, the flow control assembly controls the conduction of the water path between the first water inlet cavity 16 and the vacuum cavity 22, the flow rate after the conduction is related to the vacuum degree in the vacuum cavity 22, the higher the vacuum degree is, the larger the flow rate after the conduction is, the smaller the flow rate after the conduction is, the working voltage (power) of the water supply pump can be adjusted to adjust the vacuum degree in the vacuum cavity 22 when the water supply pump works, and the output flow rate when the flow control pump works can be adjusted by adjusting the working voltage (power) of the water supply pump, the operation of the motor 15 changes the vacuum degree in the vacuum cavity 22, so that the control rod moves up and down, the flow control pump can be normally started to pump water, and the pressure or non-pressure source water in the water inlet cavity can upwards block the end face of the control rod, so that the resistance is increased when the control rod moves down, particularly when a pressure water source is available, the resistance is more obvious, and the flow control pump is not easy to start water pumping work. In this embodiment, a first water inlet channel 02 is disposed at a middle position of the control lever, and the source water entering the water inlet chamber from the water inlet 01 can reach two ends of the control lever, so that the two ends of the control lever can feel water pressure, the first control lever 27 and the second control lever 08 are both vertically disposed and coaxially disposed, the first water inlet channel 02 simultaneously penetrates the first control lever 27 and the second control lever 08, that is, the upper end surface of the first control lever 27 and the lower cross section of the second control lever 08 can feel water pressure, and the water pressure is the same, the area of the top end of the first control lever 27 sensing water pressure is the same as the area of the bottom end of the second control lever 08 sensing water pressure, so that the pressure of the source water on the upper end surface of the first control lever 27 is the same as the pressure on the lower end surface of the second control lever 08, but the directions of the pressures of the source water are opposite, so that the pressures of the source water on the first control lever 27 and the second control lever 08 can be offset each other, the source water can not generate blocking force on the control rod, so that the influence of water pressure on the control rod is avoided, and the flow control pump can be normally started.

Example 2

As shown in fig. 1, the flow control assembly further includes a return spring 21, the pressure sensing piece is a pressure sensing plate 23, the pressure sensing plate 23 is located in the vacuum chamber 22, and the side wall of the pressure sensing plate 23 is slidably connected with the side wall of the vacuum chamber 22 through a first sealing ring 06, one end of the return spring 21 acts on the bottom surface of the pressure sensing plate 23, the other end of the return spring acts on the inner bottom wall of the vacuum chamber 22, an atmosphere cavity 24 is formed between the pressure sensing plate 23 and the valve cover 03, and an atmosphere hole 04 is formed in the valve cover 03; the water inlet 01 is arranged in the middle of the valve cover 03 and communicated with the first water inlet flow channel 02, the bottom surface of the valve cover 03 is provided with a sliding cavity 37 which is used for the first control rod 27 to slide up and down and communicated with the water inlet 01, a second sealing ring 26 is compressed between the first control rod 27 and the sliding cavity 37, the side wall of the second control rod 08 is provided with a flow limiting groove 07 which is positioned below the pressure sensing plate 23, a third sealing ring 09 is compressed between the lower end of the second control rod 08 and the inner wall of the pump head body 10, and the second control rod 08 forms a flow control assembly for controlling the on-off of a water channel between the first water inlet cavity 16 and the vacuum cavity 22 under the combined action of the air pressure in the atmospheric cavity 24, the pressure in the vacuum cavity 22 and the reset spring 21.

The working principle of the embodiment is as follows: when the flow control pump does not work, the sum of the acting force of the pressure in the vacuum cavity 22 and the elastic force of the return spring 21 on the pressure sensing plate 23 is larger than the acting force of the pressure in the atmosphere cavity 24 on the pressure sensing plate 23, and the second control rod 08 seals a water channel between the first water inlet cavity 16 and the vacuum cavity 22 under the combined action of the acting forces; when the flow control pump works, water flow or air in the vacuum cavity 22 is sucked away to form a certain vacuum degree, at the moment, the sum of acting forces of the pressure in the vacuum cavity 22 and the elastic force of the return spring 21 on the pressure sensing plate 23 is smaller than the acting force of the pressure in the atmosphere cavity 24 on the pressure sensing plate 23, the second control rod 08 moves downwards (in the direction of the first water inlet cavity 16) under the combined action of the acting forces, the second control rod 08 is provided with the flow limiting groove 07 on the side wall, namely the lower end of the second control rod 08 is not provided with the flow limiting groove 07, the side wall between the lower end and the pressure sensing plate 23 is provided with the flow limiting groove 07, the part of the lower end of the second control rod 08 without the flow limiting groove 07 completely moves downwards into the first water inlet cavity 16, and when the second control rod 08 continues to move downwards, at the moment, the first water inlet cavity 16 is communicated with the vacuum cavity 22 through the flow limiting groove 07. When the flow limiting groove 07 of the second control rod 08 just moves downwards into the first water inlet cavity 16, the flow channel of the first water inlet cavity 16 communicated with the vacuum cavity 22 through the flow limiting groove 07 is small, the flow rate pumped by the flow control pump is small, if the second control rod 08 moves downwards continuously, the distance of the part of the second control rod 08 with the flow limiting groove 07 moving downwards into the first water inlet cavity 16 is longer, the flow channel area of the first water inlet cavity 16 communicated with the vacuum cavity 22 through the flow limiting groove 07 is increased, and the flow rate pumped by the flow control pump is increased. Therefore, the vacuum in the vacuum chamber 22 can be adjusted by adjusting the operating voltage (power) of the current control pump, and the distance that the second control rod 08 moves down is adjusted, thereby achieving the function of adjusting the output flow of the current control pump. Meanwhile, the water inlet 01 is arranged at the top end of the valve cover 03, the first control rod 27 can slide up and down in the sliding cavity 37, source water from the water inlet 01 enters the first water inlet cavity 16 through the first water inlet flow passage 02, the upper end surface of the first control rod 27 and the lower end surface of the second control rod 08 can be under the action of water pressure, the first control rod 27 and the second control rod 08 are arranged integrally with the pressure sensing plate 23 and are in a cross shape, the first water inlet flow passage 02 enables the water inlet 01 and the first water inlet cavity 16 to form a communicating device, the area of the top end of the first control rod 27 sensing the water pressure is the same as the area of the bottom end of the second control rod 08 sensing the water pressure, so that the pressure of the source water on the upper end surface of the first control rod 27 is the same as the pressure on the lower end surface of the second control rod 08, but the first control rod 27 is vertically downward when receiving the water pressure, the water pressure of the second control rod 08 is vertically upward, the directions of the source water and the control rod are opposite, so that the pressure of the source water on the first control rod 27 and the second control rod 08 can be offset by mutual hedging, the source water with or without pressure can not generate overlarge resistance on the control rods, the influence of the water pressure on the control rods is avoided, and the flow control pump can be normally opened.

Example 3

As shown in fig. 2, the pressure sensing member in this embodiment is a sensing diaphragm 36, and as in the remaining embodiment 2, the sensing diaphragm 36 is circumferentially pressed and sealed between the valve cover 03 and the negative pressure valve seat 20, the middle portion of the sensing diaphragm 36 is pressed against the supporting plate 38 through the diaphragm pressing plate 28, and the supporting plate 38 is disposed in the circumferential direction of the middle portion of the control rod.

Example 4

As shown in fig. 1, a pressing collar 25 for pressing the second sealing ring 26 is provided in the sliding chamber 37. Compress tightly the lantern ring 25 and match with the size of sliding chamber 37, compress tightly the lantern ring 25 and cup joint in sliding chamber 37, compress tightly lantern ring 25 and be located valve gap lower extreme 05 positions, compress tightly second sealing washer 26 fixedly, avoid first control lever 27 when sliding from top to bottom, second sealing washer 26 can not follow the slip, guarantee the sealing performance of second sealing washer 26 between to first control lever 27 and the sliding chamber 37 inner wall, make the rivers of water inlet 01 can not leak in the atmosphere chamber 24.

The one-way structure of intaking includes into water one-way diaphragm 31 and inlet opening 13, and the one-way diaphragm 31 circumference of intaking covers inlet opening 13, and inlet opening 13 sets up in pump head body 10. The water inlet one-way diaphragm 31 ensures that water flow only flows to the pressurizing cavity 33 from the second water inlet cavity 12, and the backflow phenomenon cannot occur.

Preferably, the one-way structure of going out water includes one-way diaphragm 34 of going out water and apopore 32, and one-way diaphragm 34 of going out water covers apopore 32 circumferentially, and apopore 32 sets up in pump head body 10. The water outlet one-way diaphragm 34 ensures that the water flow only flows from the inner part of the pressurizing cavity 33 to the water outlet cavity 35, and the backflow phenomenon can not occur.

Example 5

In this embodiment, the water outlet 14 is vertically disposed, the water outlet 14 is communicated with the water outlet cavity 35 through the water outlet channel 30, and the water outlet channel 30 is formed by the side plate 11 and the pump head body 10. The water outlet 14 is parallel to the direction of the output shaft of the motor 15 of the flow control pump, so that the cross-sectional area of the whole pump is reduced conveniently, and the manufacturing process is convenient to realize.

The side plate 11 is sleeved with a fourth sealing ring 29, and the fourth sealing ring 29 is tightly pressed between the pump head body 10 and the side plate 11. The fourth sealing ring 29 enhances the sealing performance between the side plate 11 and the pump body, and avoids the water leakage between the side plate 11 and the pump body 10.

Example 6

As shown in fig. 3, the water inlet 01 in this embodiment is disposed on the pump head body 10, the pressure sensing element is a pressure sensing plate 23, the remaining structure of the flow control pump is the same as that in embodiment 2, the source water enters the first water inlet chamber 16 through the water inlet 01, enters the sliding chamber 37 through the first water inlet flow channel 02, at this time, the water pressure in the water inlet chamber is upward, the water pressure in the sliding chamber 37 is downward, the water pressure in the sliding chamber 37 is offset by each other, so that the first control rod 27 and the second control rod 08 are not affected by the water pressure, when the motor 15 operates, the change of the decrease of the vacuum degree in the vacuum chamber 22 causes the first control rod 27 to move downward in the sliding chamber 37, the second control rod 08 moves downward (the first water inlet chamber 16), after moving a certain distance, the vacuum chamber 22 is communicated with the first water inlet chamber 16 through the flow limiting groove 07, so as to control the normal opening of the flow control pump and start pumping water, so that the pressurized or non-pressurized water source will not affect the control rod, and the normal opening of the flow control pump is ensured.

Example 7

As shown in fig. 4, the pressure-sensitive member in this embodiment employs a sensing diaphragm 36, and the rest of the structure is the same as that in embodiment 3.

The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.

Claims (10)

1. The flow control pump with the hedging structure comprises a pump body (10), wherein a first water inlet cavity (16), a second water inlet cavity (12), a pressurizing cavity (33) and a water outlet cavity (35) are arranged in the pump body (10), the first water inlet cavity (16) and the water outlet cavity (35) are respectively communicated with a water inlet (01) and a water outlet (14), a negative pressure valve seat (20) is hermetically connected onto the pump body (10), a vacuum cavity (22) is arranged in the negative pressure valve seat (20), a waterway between the vacuum cavity (22) and the second water inlet cavity (12) is communicated, the second water inlet cavity (12) is communicated with the pressurizing cavity (33) through a water inlet one-way structure, the pressurizing cavity (33) is communicated with the water outlet cavity (35) through a water outlet one-way structure, and a waterway component for controlling the on-off of water flow is arranged on the first water inlet cavity (16) and the vacuum cavity (22) and is communicated with the water inlet cavity The pressure sensing piece, the control lever passes pressure sensing piece and upwards forms first control lever (27) and second control lever (08) with downwardly extending respectively, and the area that first control lever (27) top experienced water pressure is the same with the area that second control lever (08) bottom experienced water pressure, and the control lever middle part is equipped with first water inlet runner (02) that run through, and first water inlet runner (02) switch on with first intake antrum (16).

2. The flow control pump with the hedging structure is characterized in that the flow control assembly further comprises a return spring (21), the pressure sensing piece is a pressure sensing plate (23), the pressure sensing plate (23) is positioned in the vacuum cavity (22), the side wall of the pressure sensing plate is in sliding connection with the side wall of the vacuum cavity (22) through a first sealing ring (06), one end of the return spring (21) acts on the bottom surface of the pressure sensing plate (23), the other end of the return spring acts on the inner bottom wall of the vacuum cavity (22), an atmosphere cavity (24) is formed between the pressure sensing plate (23) and the valve cover (03), and the valve cover (03) is provided with an atmosphere hole (04); the water inlet (01) is arranged in the middle of the valve cover (03) and communicated with the first water inlet flow channel (02), a sliding cavity (37) which is used for enabling the first control rod (27) to slide up and down and communicated with the water inlet (01) is arranged on the bottom surface of the valve cover (03), a second sealing ring (26) is compressed between the first control rod (27) and the sliding cavity (37), a flow limiting groove (07) which is located below the pressure sensing plate (23) is arranged on the side wall of the second control rod (08), a third sealing ring (09) is compressed between the lower end of the second control rod (08) and the inner wall of the pump body (10), and a flow control assembly for controlling the on-off of a water channel between the first water inlet cavity (16) and the vacuum cavity (22) is formed under the combined action of the second control rod (08) in the atmosphere cavity (24), the pressure in the vacuum cavity (22) and the reset spring (21).

3. The flow control pump with the hedging structure is characterized in that the sensing piece is a sensing diaphragm (36), the sensing diaphragm (36) is circumferentially pressed and sealed between the valve cover (03) and the negative pressure valve seat (20), and the middle part of the sensing diaphragm (36) is pressed on the supporting plate (38) through a diaphragm pressing plate (28); the support plate (38) is disposed in a circumferential direction of the control rod intermediate section.

4. A flow control pump with hedging structure according to claim 2, characterized in that a pressing collar (25) for pressing the second sealing ring (26) is provided in the sliding chamber (37).

5. The flow control pump with the hedging structure is characterized in that the vacuum cavity (22) is communicated with the second water inlet cavity (12) through a water inlet groove (19) and a second water inlet flow channel (17) in sequence, the water inlet groove (19) is formed by the inner wall of the negative pressure valve seat (20) and the inner wall of the pump head body (10), and the second water inlet flow channel (17) is arranged in the pump head body (10).

6. The flow control pump with the hedging structure is characterized in that the water inlet one-way structure comprises a water inlet one-way diaphragm (31) and a water inlet hole (13), the water inlet one-way diaphragm (31) circumferentially covers the water inlet hole (13), and the water inlet hole (13) is arranged in the pump head body (10).

7. The flow control pump with the hedging structure is characterized in that the outlet one-way structure comprises an outlet one-way diaphragm (34) and an outlet hole (32), the outlet one-way diaphragm (34) circumferentially covers the outlet hole (32), and the outlet hole (32) is arranged in the pump head body (10).

8. The flow control pump with the hedging structure is characterized in that the water outlet (14) is vertically arranged, the water outlet (14) is communicated with the water outlet cavity (35) through the water outlet flow channel (30), and the water outlet flow channel (30) is formed by the side plate (11) and the pump head body (10).

9. The flow control pump with the hedging structure is characterized in that a fourth sealing ring (29) is sleeved on the side plate (11), and the fourth sealing ring (29) is pressed between the pump body (10) and the side plate (11).

10. A flow control pump with hedging structure according to claim 2, wherein the water inlet (01) is arranged at the side of the pump body (10).

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