CN216241258U

CN216241258U - Double-water-inlet and double-water-outlet water supply pump

Info

Publication number: CN216241258U
Application number: CN202122997520.2U
Authority: CN
Inventors: 周如景
Original assignee: Zhongshan Willpower Motor & Electric Appliance Co ltd
Current assignee: Zhongshan Willpower Motor & Electric Appliance Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-04-08
Anticipated expiration: 2031-12-01

Abstract

The utility model discloses a double-water-inlet and double-water-outlet water supply pump, wherein a first water inlet cavity, a pressurizing cavity and a water outlet cavity are arranged in a pump head body, the first water inlet cavity and the water outlet cavity are respectively communicated with a first water inlet and a first water outlet, a valve seat and a second water outlet communicated with the water outlet cavity are arranged on the pump head body, a second water inlet is arranged on the valve seat, a vacuum cavity is formed between the valve seat and the pump head body, a second water inlet cavity is also arranged in the pump head body, the vacuum cavity is communicated with the second water inlet cavity through a water inlet flow channel, the second water inlet cavity is communicated with the pressurizing cavity through a one-way water flow control structure, a water sealing sleeve ring and a flow control switching assembly for controlling the water path at the water sealing sleeve ring to be sealed or communicated are formed on a water path where the first water inlet and the second water inlet and the vacuum cavity are communicated, and a switching rod is arranged on a water path where the first water outlet and the water outlet cavity are communicated. The water supply pump divides normal temperature water, preheated water or other water sources into water supply pumps for input, and the water supply pumps respectively supply water to the heating units, so that the applicability of the water supply pump is improved.

Description

Double-water-inlet and double-water-outlet water supply pump

Technical Field

The utility model relates to the technical field of fluid transportation, in particular to a double-water-inlet and double-water-outlet water supply pump.

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 the water dispenser system is provided with the normal-pressure water tank and the pressure water tank or the preheating water tank and needs to supply water to the heating units respectively, the water supply pump cannot separately supply water to the heating units, and the application of the water supply pump is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a double-water-inlet and double-water-outlet water supply pump which is used for respectively inputting normal-temperature water, preheated water or other water sources into the water supply pump, and the water supply pump respectively supplies water to a heating unit, so that the applicability of the water supply pump is improved.

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

a double-water-inlet and double-water-outlet water supply pump comprises a pump body, wherein a first 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 first water inlet and a first water outlet, a valve seat and a second water outlet communicated with the water outlet cavity are arranged on the pump body, a second water inlet is arranged on the valve seat, a vacuum cavity is formed between the valve seat and the pump body, the pump body is also internally provided with a second water inlet cavity, the vacuum cavity is communicated with the second water inlet cavity through a water inlet flow channel, the second water inlet cavity is communicated with the pressurizing cavity through a one-way water flow control structure, a water sealing sleeve ring and a flow control switching assembly for controlling the water path at the water sealing sleeve ring to be sealed or switched on are formed on a water path where the first water inlet and the second water outlet cavity are communicated, and a switching rod is arranged on a water path where the first water outlet and the water outlet cavity are communicated.

Optionally, the flow control switching assembly includes a control rod, a pressure sensing plate, and a return spring, the pressure sensing plate is connected with the inner wall of the vacuum chamber in a sliding manner in a circumferential direction, an atmospheric cavity is formed between the pressure sensing plate and the valve seat, a first atmospheric hole is formed in the valve seat, a first sleeve is arranged on the bottom surface of the pressure sensing plate, the upper end of the first sleeve is open, a sealing block is arranged at the lower end of the first sleeve, the lower end of the sealing block is connected with the switching rod, a supporting sleeve ring forming a first water inlet cavity is sleeved on the sealing block in the circumferential direction, a second sleeve is arranged on the bottom surface of the valve seat and is in sliding sealing connection with the first sleeve, the control rod is arranged in the first sleeve, the lower end of the control rod is in sliding sealing connection with the sealing block, a first flow limiting groove is formed in the outer side wall of the first sleeve, a second flow limiting groove is formed in the inner side wall of the second sleeve, one end of the return spring acts on the pressure sensing plate, the other end acts on the water sealing sleeve ring, and the control rod acts on the atmospheric cavity, The pressure in the vacuum cavity and the combined action of the return spring form a sealing water sealing lantern ring or a flow control switching assembly for controlling the conduction of the water sealing lantern ring.

Optionally, a water inlet groove is formed between the control rod and the inner wall of the first sleeve, and a water inlet hole communicated with the first water inlet cavity and the water inlet groove is formed in the side wall of the first sleeve.

Optionally, disk seat upper end an organic whole is equipped with the valve cap, and the control lever upper end is equipped with the hedging pole with valve cap sliding connection, is equipped with the water groove of crossing with the switch-on of second water inlet on the hedging pole lateral wall, and the valve cap top is equipped with the big gas pocket of second, and the circumference cover in the hedging pole upper end is equipped with first sealing washer.

Optionally, a second sealing ring is circumferentially sleeved on the upper end of the control rod.

Optionally, a matched supporting sleeve is arranged at the lower end of the supporting sleeve ring, a third sealing ring is compressed between the supporting sleeve ring and the water sealing sleeve ring, a fourth sealing ring is compressed between the supporting sleeve ring and the supporting sleeve, a fifth sealing ring is sleeved on the lower end of the supporting sleeve in the circumferential direction, and the switching rod is located in the supporting sleeve and is in sealing sliding sleeve joint with the lower end of the supporting sleeve.

Optionally, the switching rod is circumferentially sleeved with a sixth sealing ring.

Optionally, a water outlet groove communicated with the second water outlet is formed in the side wall of the support sleeve, a water passing cavity formed by the pump head body and communicated with the first water outlet is arranged below the support sleeve, and the water passing cavity is communicated with the water outlet cavity through a water passing flow channel below the support sleeve.

The utility model has the following beneficial effects:

1. the utility model installs a valve base on the top of the pump head, set up the second water inlet on the valve base, set up the first water inlet, first water outlet, second water outlet on the pump head, form two water inlets, water outlet, so normal temperature water, preheating water can be delivered to the water supply pump separately, and form the vacuum chamber communicated with second water inlet chamber between valve base and the pump head, when the water supply pump is out of operation, the water path of the water sealing lantern ring of control switching module control is sealed; when the water supply 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 switching component controls the water channel at the position of the water sealing sleeve ring to be conducted, 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, the output flow of the water supply pump when the water supply pump works can be adjusted by adjusting the working voltage (power) of the water supply pump, meanwhile, the working voltage of the water supply pump is adjusted, the first water inlet and the second water inlet are switched to be respectively communicated with the vacuum cavity, water is respectively supplied to the two water channels, when the working voltage of the water supply pump is changed, the flow control switching component drives the switching rod to respectively switch the water channels between the first water outlet and the water outlet cavity, the water supply pump is used for supplying water to the heating units respectively, so that the structural design of the water supply pump can control normal-temperature water and preheated water to be supplied to the heating units from different water ways by adjusting the working voltage of the water supply pump, and the applicability of the water supply pump is enhanced.

Drawings

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

fig. 2 is a schematic structural view of embodiment 2.

Reference numerals: 01-a second water inlet, 02-a first water inlet, 03-a pump head body, 04-a second water outlet, 05-a first water outlet, 06-a second water inlet cavity, 07-a valve seat, 08-a valve cap, 09-a first sealing ring, 10-a second big air hole, 11-a pair of punching rods, 12-a water passing groove, 13-a second sealing ring, 14-a first big air hole, 15-a pressure sensing plate, 16-a second sleeve, 17-a seventh sealing ring, 18-a second flow limiting groove, 19-a control rod, 20-a water inlet flow channel, 21-a first sleeve, 22-a sealing block, 23-a water outlet groove, 24-a supporting sleeve, 25-a sixth sealing ring, 26-a water passing flow channel, 27-a motor, 28-a pressurizing assembly and 29-a water outlet cavity, 30-switching rod, 31-fifth sealing ring, 32-fourth sealing ring, 33-first water inlet cavity, 34-water inlet groove, 35-water inlet hole, 36-third sealing ring, 37-water sealing sleeve ring, 38-vacuum cavity, 39-return spring, 40-eighth sealing ring, 41-first water limiting groove, 42-water passing cavity, 43-supporting sleeve ring and 44-pressurizing cavity.

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 fig. 1 and 2, a double-inlet and double-outlet water supply pump comprises a pump body 03, a first inlet cavity 33, a pressurizing cavity 44 and a water outlet cavity 29 are arranged in the pump body 03, the first inlet cavity 33 and the water outlet cavity 29 are respectively communicated with a first water inlet 02 and a first water outlet 05, a valve seat 07 and a second water outlet 04 communicated with the water outlet cavity 29 are arranged on the pump body 03, a second water inlet 01 is arranged on the valve seat 07, a vacuum cavity 38 is formed between the valve seat 07 and the pump body 03, a second inlet cavity 06 is also arranged in the pump body 03, the vacuum cavity 38 is communicated with the second inlet cavity 06 through a water inlet flow channel 20, the second inlet cavity 06 is communicated with the pressurizing cavity 44 through a one-way water flow control structure, a water sealing collar 37 and a flow control switching component for controlling the sealing or the conduction of a water path of the water sealing collar 37 are formed on the water paths through which the first water inlet 02 and the second water inlet 01 are communicated with the vacuum cavity 38, a switching rod 30 is arranged on a waterway communicating the first water outlet 05 and the second water outlet 04 with the water outlet cavity 29.

The water supply pump in the embodiment is suitable for a normal-temperature water source and a preheating water source, and when the water supply pump does not work, the flow control switching assembly controls the water path at the water sealing lantern ring 37 to be sealed; when the water supply pump works, water flow or air in the vacuum cavity 38 is sucked away to form a certain vacuum degree, at the moment, the flow control switching assembly controls the water passage at the water sealing sleeve ring 37 to be communicated, the communicated flow is related to the vacuum degree in the vacuum cavity 38, the higher the vacuum degree is, the larger the communicated flow is, the smaller the vacuum degree is, the smaller the communicated flow is, the working voltage (power) of the water supply pump can be adjusted to adjust the vacuum degree in the vacuum cavity 38 when the water supply pump works, the output flow of the water supply pump when the water supply pump works can be adjusted by adjusting the working voltage (power) of the water supply pump, meanwhile, the working voltage of the water supply pump is adjusted, the first water inlet 02 and the second water inlet 01 are switched to be communicated with the vacuum cavity 38 respectively, the two water passages can supply normal-temperature water or preheated water respectively, when the working voltage of the water supply pump changes, the flow control switching assembly drives the switching rod 30 to respectively switch the first water outlet 05 and the second water outlet 05, The water channel between the second water outlet 04 and the water outlet cavity 29 is communicated, so that the water supply pump can respectively supply water to the heating units, therefore, the structural design of the utility model can control normal temperature water and preheated water to be respectively supplied to the heating units from different water channels by adjusting the working voltage of the water supply pump, and the applicability of the water supply pump is enhanced.

Example 2

As shown in fig. 1 and 2, the flow control switching assembly includes a control rod 19, a pressure sensing plate 15, a return spring 39, the pressure sensing plate 15 is connected with the inner wall of the vacuum chamber 38 in a sealing and sliding manner, an atmosphere chamber is formed between the pressure sensing plate 15 and the valve seat 07, a first atmosphere hole 14 is formed on the valve seat 07, an eighth sealing ring 40 is sleeved on the pressure sensing plate 15 in the circumferential direction to prevent water in the vacuum chamber 38 from leaking into the atmosphere chamber, a first sleeve 21 is arranged on the bottom surface of the pressure sensing plate 15, an opening is formed at the upper end of the first sleeve 21, a sealing block 22 is arranged at the lower end of the first sleeve 21, a switching rod 30 is connected to the lower end of the sealing block 22, a supporting collar 43 forming the first water inlet chamber 33 is sleeved on the sealing block 22 in the circumferential direction, a second sleeve 16 is arranged on the bottom surface of the valve seat 07 in a sliding and sealing manner and sleeved with the first sleeve 21, the control rod 19 is arranged in the first sleeve 21 and the lower end thereof is connected with the sealing block 22, the upper end of the control rod 19 in a sliding and sealing manner and sleeved with the second sleeve 16, a first flow limiting groove 41 is arranged on the outer side wall of the first sleeve 21, the inner side wall of the second sleeve 16 is provided with a second flow limiting groove 18, one end of a return spring 39 acts on the pressure sensing plate 15, the other end of the return spring acts on the water sealing lantern ring 37, and the control rod 19 forms a flow control switching assembly for sealing the water sealing lantern ring 37 or controlling the conduction of the water sealing lantern ring 37 under the combined action of the air pressure in the atmosphere cavity, the pressure in the vacuum cavity 38 and the return spring 39.

Specifically, a water inlet groove 34 is formed between the control rod 19 and the inner wall of the first sleeve 21, and a water inlet hole 35 communicating the first water inlet cavity 33 and the water inlet groove 34 is formed in the side wall of the first sleeve 21.

According to the working principle of the embodiment, when the water supply pump does not work, the sum of the acting force of the pressure in the vacuum cavity 38 and the elastic force of the return spring 39 on the pressure sensing plate 15 is larger than the acting force of the air pressure in the atmospheric cavity on the pressure sensing plate 15, and the control rod 19 seals the water sealing sleeve ring 37 under the combined action of the acting forces; when the water supply pump works, water flow or air in the vacuum cavity 38 is sucked away to form a certain vacuum degree, at the moment, the sum of acting forces of pressure in the vacuum cavity 38 and the elastic force of the return spring 39 on the pressure sensing plate 15 is smaller than the acting force of air pressure in an atmospheric cavity on the pressure sensing plate 15, the control rod 19 and the pressure sensing plate 15 move downwards under the combined action of the acting forces, the side wall of the first sleeve 21 is provided with a first flow limiting groove 41, the first sleeve 21 moves downwards along with the pressure sensing plate 15, when the lower end of the first flow limiting groove 41 exceeds the upper end of the first water inlet cavity 33, the vacuum cavity 38 is communicated with the first water inlet cavity 33, normal-temperature water or a non-pressure water source can be input through the first water inlet 02 at the moment, however, the working voltage of the water supply pump is small, the distance for downward movement of the control rod 19 is small, and the water path between the second water inlet 01 and the second flow limiting groove 18 is sealed, the sixth sealing ring 25 of the switching rod 30 which is sleeved in the circumferential direction is located above the water passing channel 26, the sixth sealing ring 25 blocks a water path between the water outlet cavity 29 and the second water outlet 04, the water path between the water outlet cavity 29 and the first water outlet 05 is communicated through the water passing cavity 42 and the water outlet channel, the non-pressurized water or normal temperature water which enters the vacuum cavity 38 from the first water inlet 02 enters the second water inlet cavity 06 through the water inlet channel 20, and then enters the pressurizing cavity 44 through the one-way water flow control structure (water inlet one-way valve flap), the water in the pressurizing cavity 44 is pumped to the water outlet cavity 29 under the action of the pressurizing assembly 28 driven by the motor 27, the water in the water outlet cavity 29 is conveyed to the heating unit through the first water outlet 05, and the connection relationship and the structural principle of the pressurizing assembly 28 and the motor 27 are the prior art of water supply pumps.

When the voltage of the water supply pump continues to increase and the distance of downward movement of the control rod 19 is more, because the inner side wall of the second sleeve 16 is provided with the second flow limiting groove 18, when the second sealing ring 13 moves downwards along with the control rod 19 to exceed the upper end of the second flow limiting groove 18, the second water inlet 01 is communicated with the second flow limiting groove 18, at this time, preheated water or pressurized water can be input through the second water inlet 01, then enters the first water inlet cavity 33 through the second flow limiting groove 18, the water inlet groove 34 and the water inlet hole 35, and finally enters the vacuum cavity 38 through the first flow limiting groove 41 from the first water inlet cavity 33, at this time, in order to avoid backflow of the preheated water or pressurized water in the first water inlet cavity 33, a one-way valve can be arranged on the first water inlet 02, the pressurized water or the preheated water entering the vacuum cavity 38 enters the second water inlet cavity 06 through the water inlet flow passage 20, and then enters the pressurizing cavity 44 through a one-way water flow control structure (water inlet one-way valve flap), the water in the pressurizing cavity 44 is pumped to the water outlet cavity 29 under the action of the pressurizing assembly 28 driven by the motor 27, because the voltage is larger, the downward moving distance of the pressure sensing plate 15 is larger, the distance that the pressure sensing plate 15 drives the first sleeve 21, the sealing block 22 and the switching rod 30 to move downward is larger, the distance that the control rod 19 pushes the switching rod 30 to move downward is larger, at this time, the sixth sealing ring 25 on the switching rod 30 is located in the water passing cavity 42, the sixth sealing ring 25 seals the water path between the water passing channel 26 and the water passing cavity 42, so that the first water outlet 05 is blocked, the water path between the water passing channel 26 and the second water outlet 04 is connected, and the pressurized water or the preheated water in the water outlet cavity 29 is pumped to the second water outlet 04 through the water passing channel 26 and the water passing groove 12 and is conveyed to the heating unit. In the embodiment, different working voltages are input into the water supply pump, the control rod 19 and the pressure sensing plate 15 move downwards at different distances, so that the first water inlet 02 and the second water inlet 01 respectively enter the vacuum cavity 38 under different working voltage values, the switching rod 30 also moves downwards at different distances, so that the water outlet cavity 29 is respectively communicated with the first water outlet 05 and the second water outlet 04 under different working voltage values, and when a non-pressure water source or normal-temperature water is input, the water is pumped to the first water outlet 05 through the first water inlet 02, the vacuum cavity 38 and the pressurizing cavity 44; when a pressure water source or preheated water is input, the water is pumped to the second water outlet 04 through the second water inlet 01, the vacuum cavity 38 and the pressurizing cavity 44. In the utility model, the water sources input by the first water inlet 02 and the second water inlet 01 can be exchanged, normal temperature water must be input by the first water inlet 02 which is not specific, and preheating water is not input by the second water inlet 01 which is not specific.

Example 3

As shown in fig. 1 and 2

Preferably, a valve cap 08 is integrally arranged at the upper end of the valve seat 07, an opposite punching rod 11 in sliding connection with the valve cap 08 is arranged at the upper end of the control rod 19, a water passing groove 12 communicated with the second water inlet 01 is formed in the side wall of the opposite punching rod 11, a second large air hole 10 is formed in the top end of the valve cap 08, and a first sealing ring 09 is circumferentially sleeved at the upper end of the opposite punching rod 11.

In this embodiment, a valve cap 08 is integrally formed on the valve seat 07, the upper end of the control rod 19 is integrally connected with the plunger 11, a cavity which is convenient for moving the plunger 11 up and down is arranged in the valve cap 08, the cavity is communicated with the second water inlet 01, the lower end of the plunger 11 is circumferentially provided with the water passing groove 12, the plunger 11 is driven by the control rod 19 to move up and down, the water pressure of the pressurized water entering the cavity acts on the upper end of the plunger 11 and the top end of the control rod 19 respectively, the pressurized water acts on the upper end of the plunger 11 and the top end of the control rod 19, but the directions are opposite, so that the water pressure received by the two sides is offset, the pressurized water entering the cavity of the valve cap 08 cannot affect the normal moving up and down of the control rod 19, and the water path switching is facilitated.

Example 4

The lower extreme of the supporting sleeve ring 43 is equipped with the supporting sleeve 24 that matches, and it has third sealing washer 36 to compress tightly between the supporting sleeve ring 43 and the water seal lantern ring 37, and it has fourth sealing washer 32 to compress tightly between the supporting sleeve ring 43 and the supporting sleeve 24, and the circumference cover of the lower extreme of the supporting sleeve 24 is equipped with fifth sealing washer 31, and switch lever 30 is located the supporting sleeve 24 and cup joints with the sealed slip of supporting sleeve 24 lower extreme.

In this embodiment, the supporting sleeve ring 43 is slidably sleeved with the sealing block 22 to guide the up-and-down sliding of the sealing block 22, the lower end of the supporting sleeve 24 is a downward protruding section, the protruding section is slidably sleeved with the switching rod 30 to guide the up-and-down movement of the switching rod 30, a water passing channel 26 is formed between the protruding section and the body of the pump head body 03 forming the water passing cavity 42, the water passing channel 26 is communicated with the water outlet cavity 29, and the side wall of the supporting sleeve 24 is provided with a water outlet groove 23 communicated with the second water outlet 04.

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

1. The utility model provides a two water supply pump of intaking, two play water, includes pump head body (03), is equipped with first intake antrum (33), pressure boost chamber (44), goes out water cavity (29) in pump head body (03), and first intake antrum (33), play water cavity (29) are respectively with first water inlet (02), first delivery port (05) switch-on, its characterized in that, be equipped with disk seat (07) on pump head body (03), with second delivery port (04) of going out water cavity (29) switch-on, be equipped with second water inlet (01) on disk seat (07), constitute between disk seat (07) and pump head body (03) and have vacuum chamber (38), still be equipped with second intake antrum (06) in pump head body (03), vacuum chamber (38) are put through with second intake antrum (06) through influent stream channel (20), and second intake antrum (06) are put through with pressure boost chamber (44) through one-way rivers control structure, first water inlet (02), A water sealing sleeve ring (37) and a flow control switching component for controlling the sealing or the conduction of the water channel at the position of the water sealing sleeve ring (37) are formed on the water channel communicated with the vacuum cavity (38) through the second water inlet (01), and a switching rod (30) is arranged on the water channel communicated with the water outlet cavity (29) through the first water outlet (05) and the second water outlet (04).

2. The double-inlet and double-outlet water supply pump according to claim 1, wherein the flow control switching assembly comprises a control rod (19), a pressure sensing plate (15) and a return spring (39), the pressure sensing plate (15) is connected with the inner wall of the vacuum chamber (38) in a sealing and sliding manner in the circumferential direction, an atmosphere chamber is formed between the pressure sensing plate (15) and the valve seat (07), a first atmosphere hole (14) is formed in the valve seat (07), a first sleeve (21) is arranged on the bottom surface of the pressure sensing plate (15), a sealing block (22) is arranged at the upper end and at the lower end of the first sleeve (21), the lower end of the sealing block (22) is connected with the switching rod (30), a supporting sleeve ring (43) forming the first inlet chamber (33) is sleeved on the circumferential direction of the sealing block (22), a second sleeve (16) which is sleeved with the first sleeve (21) in a sliding and sealing manner is arranged on the bottom surface of the valve seat (07), the control rod (19) is positioned in the first sleeve (21) and the lower end of the control rod is connected with the sealing block (22), the upper end of the control rod (19) is sleeved with the second sleeve (16) in a sliding sealing mode, a first flow limiting groove (41) is formed in the outer side wall of the first sleeve (21), a second flow limiting groove (18) is formed in the inner side wall of the second sleeve (16), one end of a return spring (39) acts on the pressure sensing plate (15), the other end of the return spring acts on the water sealing sleeve ring (37), the control rod (19) forms a sealed water sealing sleeve ring (37) or a control flow switching assembly for controlling the water sealing sleeve ring (37) to be conducted under the combined action of air pressure in the atmosphere cavity, pressure in the vacuum cavity (38) and the return spring (39).

3. A dual inlet and outlet water supply pump as claimed in claim 2, wherein a water inlet channel (34) is formed between the control lever (19) and the inner wall of the first sleeve (21), and a water inlet hole (35) communicating the first inlet chamber (33) and the water inlet channel (34) is formed in the side wall of the first sleeve (21).

4. The double-inlet and double-outlet water supply pump as claimed in claim 2, wherein a valve cap (08) is integrally arranged at the upper end of the valve seat (07), a counter-plunger (11) slidably connected with the valve cap (08) is arranged at the upper end of the control rod (19), a water passing groove (12) communicated with the second water inlet (01) is arranged on the side wall of the counter-plunger (11), a second large air hole (10) is arranged at the top end of the valve cap (08), and a first sealing ring (09) is circumferentially sleeved at the upper end of the counter-plunger (11).

5. A double inlet and outlet feed pump according to claim 4, wherein the control rod (19) is circumferentially fitted with a second sealing ring (13) at its upper end.

6. The double-water-inlet and double-water-outlet water supply pump is characterized in that a matched supporting sleeve (24) is arranged at the lower end of the supporting sleeve ring (43), a third sealing ring (36) is compressed between the supporting sleeve ring (43) and the water sealing sleeve ring (37), a fourth sealing ring (32) is compressed between the supporting sleeve ring (43) and the supporting sleeve (24), a fifth sealing ring (31) is circumferentially sleeved at the lower end of the supporting sleeve (24), and the switching rod (30) is located in the supporting sleeve (24) and is in sealing sliding sleeve connection with the lower end of the supporting sleeve (24).

7. A double inlet and outlet feed pump according to claim 6, wherein the switching lever (30) is circumferentially fitted with a sixth sealing ring (25).

8. The double-inlet and double-outlet water supply pump as claimed in claim 6, wherein the side wall of the support sleeve (24) is provided with a water outlet groove (23) communicated with the second water outlet (04), a water passing cavity (42) formed by the body of the pump head body (03) and communicated with the first water outlet (05) is arranged below the support sleeve (24), and the water passing cavity (42) is communicated with the water outlet cavity (29) through a water passing channel (26) arranged below the support sleeve (24).