CN215908047U - Pressure control structure of flow control double-channel pump - Google Patents

Abstract

The utility model discloses a pressure control structure of a flow control two-way pump, which comprises a pump head body, wherein a pressurizing cavity, a water outlet cavity and a vacuum cavity are arranged in the pump head body, a first water outlet, a second water outlet and a water inlet end are arranged on the pump head body, the vacuum cavity is communicated with the pressurizing cavity, the pressurizing cavity is communicated with the water outlet cavity, a flow control assembly is formed on a water path communicated with the water inlet end and the vacuum cavity, a switching rod is arranged on the flow control assembly, a lining is also arranged in the pump head body, an inner cavity is arranged in the lining and is communicated with the first water outlet, a plurality of through holes communicated with the inner cavity are circumferentially distributed at the lower end of the lining in an annular manner, the through holes are communicated with the water outlet cavity, a valve body is arranged on the water inlet end, and a water sealing port and a pressure control assembly for controlling the water path sealing or communication of the water sealing port are arranged on the water path communicated with the water inlet and the water inlet. According to the utility model, the water pressure of the source water at the water inlet is controlled and adjusted, so that the influence of a high-pressure water source on the switching rod is avoided, and the switching rod can accurately and normally switch the water channel.

Description

Pressure control structure of flow control double-channel pump

Technical Field

The utility model relates to the technical field of fluid conveying, in particular to a pressure control structure of a flow control double-channel pump.

Background

With the development of economy, more and more household water purifying and drinking machines enter thousands of households.

In the existing household water purifying and drinking machine systems, the water purifying and drinking machine systems are mostly divided into normal-temperature water and refrigerating and heating water paths, two water paths are divided through a water outlet of a water supply pump, electromagnetic valves are respectively installed on the corresponding water paths, and the opening of the electromagnetic valves is controlled through a control panel, so that the water outlet of a water faucet can be controlled according to needs; in the system, the complex pipeline distribution and more control parts are needed to realize the functions, so that the process cost of the whole system is higher, the system structure is complex, and the failure rate is higher, so that related personnel research and develop the flow control pump with double-way water outlet, the water supply to a normal-temperature water channel and a refrigerating and heating water channel can be respectively controlled through the switching rod in the pump, the switching of the normal-temperature water channel is realized through the change of voltage, but when the water inlet end is provided with a pressure water source, the influence of the larger water pressure of the pressure water source on the switching rod is larger, the normal operation of the pump is influenced when the switching rod is not accurately switched in the water channel, and the normal-temperature water channel, the refrigerating and heating water channel of the whole clean drinking system are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pressure control structure of a flow control double-channel pump, which is used for controlling and adjusting the water pressure of source water at a water inlet, avoiding the influence of a high-pressure water source on a switching rod and ensuring that the switching rod can accurately and normally switch a water channel.

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

a pressure control structure of a flow control two-way pump comprises a pump body, wherein a pressurizing cavity, a water outlet cavity and a vacuum cavity are arranged in the pump body, a first water outlet, a second water outlet and a water inlet end are arranged on the pump body, the vacuum cavity is communicated with the pressurizing cavity through a water passing cavity and a water inlet one-way structure, the pressurizing cavity is communicated with the water outlet cavity through a water outlet one-way structure, a water sealing sleeve ring and a flow control assembly for controlling the water path sealing or the communication of the water sealing sleeve ring are formed on a water path where the water inlet end and the vacuum cavity are communicated, a switching rod for controlling the first water outlet and the second water outlet to be communicated or blocked with the water outlet cavity is arranged on the flow control assembly, a lining is further arranged in the pump body, an inner cavity for the switching rod to slide is arranged in the lining, the inner cavity is communicated with the first water outlet, a plurality of through holes communicated with the inner cavity are distributed in an annular shape at the circumferential direction of the lower end of the lining, and are communicated with the water outlet cavity, the water inlet end is provided with a fixed sleeve ring, the fixed sleeve ring is sleeved with a valve body, the valve body is provided with a water inlet, and a water sealing opening and a pressure control assembly for controlling the water sealing opening to be sealed or communicated are arranged on a water path communicated with the water inlet hole. Compared with the prior art, the water inlet in the current flow control double-channel pump is directly connected with pressure source water, and the pressure source water can influence the accuracy of the up-and-down movement of the switching rod, so that the switching state of the water channel of the whole water purification system can be influenced. In this scheme, the end of intaking at accuse flow double-circuit pump sets up the valve body, be provided with the water inlet that the pressure water source got into on the valve body, set up accuse pressure subassembly on the water route between water inlet and the inlet opening, can the effectual inflow of adjusting pressure source water, thereby change the water pressure that accuse flow double-circuit pump intake end, just so can avoid getting into the water pressure that accuse flows in the double-circuit pump too big, reduce water pressure and reciprocate the influence of distance to the changeover lever, thereby guarantee that the accuse flows the normal switching of water route in the double-circuit pump, make the accuse flow double-circuit pump normally supply water for clean drink system.

Preferably, the pressure control assembly comprises a first pressure sensing plate, a first reset spring and a first control rod, a first sliding cavity and a second sliding cavity are arranged in the pump body, one end of the first pressure sensing plate is connected with the inner wall of the valve body in a sealing and sliding manner, the other end of the first pressure sensing plate is connected with the inner wall of the first sliding cavity in a sealing and sliding manner, an air cavity is formed between one side of the first pressure sensing plate and the pump body, a water inlet cavity is formed between the other side of the first pressure sensing plate and the valve body, the first control rod is fixedly connected with the middle part of the first pressure sensing plate, one end of the first control rod is connected with the inner wall of the second sliding cavity in a sealing and sliding manner, the other end of the first control rod is sealed with a water sealing port, a strip-shaped channel for communicating the water inlet with the second sliding cavity is arranged in the first control rod, one end of the first reset spring acts on the pump body, the other end acts on the first pressure sensing plate, a first flow limiting groove is arranged on the side wall of the first control rod, a water passing port for communicating a water path between the first flow limiting groove and the water inlet is arranged on the first pressure sensing plate, the first control rod forms a pressure control assembly for sealing the water sealing opening or controlling the conduction of the water sealing opening under the action of the air pressure in the air cavity, the water pressure in the water inlet cavity and the first return spring.

Preferably, the circumference at first control lever both ends is equipped with sixth sealing washer and seventh sealing washer respectively, the circumference at first pressure sensing board both ends is equipped with eighth sealing washer and ninth sealing washer respectively. The sixth sealing ring is used for sealing an installation gap between the second control rod and the inner wall of the second sliding cavity, the seventh sealing ring is used for sealing a water path at the water sealing port after the second control rod moves a distance leftwards, the eighth sealing ring is used for sealing an installation gap between the second pressure sensing plate and the inner wall of the first sliding cavity, water is prevented from entering the air cavity, and source water in the water inlet cavity is prevented from entering the air cavity by the ninth sealing ring.

Preferably, the flow control assembly comprises a second control rod, a second return spring and a second pressure sensing plate, the upper end of the second control rod is connected with the bottom surface of the second pressure sensing plate, the lower end of the second control rod is connected with the switching rod, the periphery of the second pressure sensing plate is in sealing contact with the side wall of the vacuum cavity, the upper end of the pump head body is provided with a pump head cover, an atmosphere cavity is formed between the second pressure sensing plate and the pump head cover, and the pump head cover is provided with an atmosphere hole for communicating the atmosphere cavity; a second flow limiting groove is formed in the side wall of the second control rod, a first sealing ring, a supporting sleeve ring and a second sealing ring are sequentially arranged on the second control rod in the circumferential direction, a water inlet hole communicated with the water inlet is formed in the supporting sleeve ring, and the first sealing ring, the supporting sleeve ring and the second sealing ring are tightly pressed between the water sealing sleeve ring and the lining; one end of a second reset spring acts on the bottom surface of the second pressure sensing plate, the other end of the second reset spring acts on the water sealing lantern ring, and a second control rod forms a flow control assembly for sealing or conducting a water path between the water inlet and the vacuum cavity under the combined action of air pressure in the atmosphere cavity, pressure in the vacuum cavity and the second reset spring.

Preferably, the periphery of the lining is sleeved with a third sealing ring, and the third sealing ring is positioned between the through hole and the first water outlet. The third sealing ring is used for sealing an installation gap between the lining and the inner wall of the pump head body, and the phenomenon that the water in the water outlet flow channel enters the first water outlet before being extracted by water is avoided.

Preferably, the periphery of the second pressure sensing plate and the side wall of the vacuum cavity are sealed by a fourth sealing ring. The fourth sealing ring is used for sealing a gap between the side face of the second pressure sensing plate and the inner side wall of the vacuum cavity, so that water in the vacuum cavity is prevented from entering the atmospheric cavity and then flowing out of the atmospheric cavity to the outside to cause water seepage of the flow control pump.

Preferably, the periphery of the lower end of the switching rod is sealed with the side wall of the inner cavity through a fifth sealing ring. The fifth sealing ring is used for sealing a gap between the side wall of the switching rod and the inner cavity wall, and prevents source water from entering the inner cavity above the fifth sealing ring in advance through the gap to cause water flow to pass through the first water outlet, so that the switching rod can be influenced in switching the water channel.

Preferably, a water outlet flow passage formed by the pump head body is arranged between the through hole and the water outlet cavity.

Preferably, the side wall of the bushing is provided with a water outlet hole for communicating a water channel between the inner cavity and the first water outlet. When the fifth sealing ring moves downwards along with the switching rod and exceeds the through hole, water in the water outlet channel enters the inner cavity of the lining through the through hole and is conveyed to the purified water system from the first water outlet through the water outlet hole.

The utility model has the following beneficial effects:

1. according to the pressure control assembly at the water inlet end of the flow control double-way pump, the water inlet amount of pressure source water can be effectively adjusted, so that the water pressure at the water inlet end of the flow control double-way pump is changed, the overlarge water pressure entering the flow control double-way pump can be avoided, the influence of the water pressure on the up-and-down moving distance of the switching rod is reduced, the normal switching of a water path in the flow control double-way pump is ensured, and the flow control double-way pump can normally supply water for a clean drinking system.

Drawings

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

FIG. 2 is a schematic view of the structure A-A in FIG. 1.

Reference numerals: 01-water inlet, 02-bar channel, 03-seventh sealing ring, 04-first control rod, 05-first return spring, 06-air cavity, 07-eighth sealing ring, 08-sixth sealing ring, 09-second sliding cavity, 10-first sliding cavity, 11-motor component, 12-shell, 13-pressurizing cavity, 14-water outlet cavity, 15-water inlet groove, 16-pump head body, 17-second water outlet, 18-first water outlet, 19-second sealing ring, 20-supporting lantern ring, 21-water inlet hole, 22-first sealing ring, 23-second control rod, 24-fourth sealing ring, 25-second pressure sensing plate, 26-pump head cover, 27-second return spring, 28-second limiting groove, 29-atmosphere cavity, 30-vacuum cavity, 31-atmosphere cavity, 32-fixed lantern ring, 33-ninth sealing ring, 34-valve body, 35-first pressure sensing plate, 36-water inlet cavity, 37-water passing opening, 38-water sealing opening, 39-first flow limiting groove, 40-water passing groove, 41-valve cover, 42-water pumping assembly, 43-pressurizing diaphragm, 44-water outlet one-way structure, 45-water inlet one-way structure, 46-water inlet through hole, 47-water outlet through hole, 48-water inlet channel, 49-water outlet hole, 50-bushing, 51-inner cavity, 52-switching rod, 53-fifth sealing ring, 54-third sealing ring, 55-through hole, 56-water outlet channel, 57-water outlet groove and 58-water sealing lantern ring.

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 pressure control structure of a flow-control two-way pump includes a pump head body 16, a pressure increasing cavity 13, a water outlet cavity 14, and a vacuum cavity 30 are provided in the pump head body 16, the pump head body 16 is provided with a first water outlet 18, a second water outlet 17, and a water inlet end, the vacuum cavity 30 is communicated with the pressure increasing cavity 13 through a water inlet slot 15 and a water inlet one-way structure 45, the pressure increasing cavity 13 is communicated with the water outlet cavity 14 through a water outlet one-way structure 44, a water sealing collar 58 and a flow control assembly for controlling the water path sealing or conduction at the water sealing collar 58 are formed on the water path where the water inlet end and the vacuum cavity 30 are communicated, the flow control assembly is provided with a switch lever 52 for controlling the communication or the blocking of the first water outlet 18 and the second water outlet 17 with the water outlet cavity 14 respectively, the pump head body 16 is further provided with a bushing 50, an inner cavity 51 for sliding the switch lever 52 is provided in the bushing 50, a water outlet 49 for communicating the water path between the inner cavity 51 and the first water outlet 18 is provided on the side wall of the bushing 50, when the fifth sealing ring 53 moves downwards along with the switching rod 52 and exceeds the through hole 55, water in the water outlet channel 56 enters the inner cavity 51 of the bushing 50 through the through hole 55 and is conveyed to the purified water system from the first water outlet 18 through the water outlet hole 49, the inner cavity 51 is communicated with the first water outlet 18, a plurality of through holes 55 communicated with the inner cavity 51 are circumferentially and annularly distributed at the lower end of the bushing 50, the through holes 55 are communicated with the water outlet cavity 14 through the water outlet channel 56, the water inlet end is provided with the fixed lantern ring 32, the fixed lantern ring 32 is sleeved with the valve body 34, the valve body 34 is provided with the water inlet 01, and a water path where the water inlet 01 is communicated with the water inlet 21 is provided with the water sealing port 38 and a pressure control component for controlling the water path 38 to be sealed or communicated.

In this embodiment, a matching bushing 50 is installed in the pump head body 16, an inner cavity 51 is provided inside the bushing 50, a plurality of through holes 55 communicating with the inner cavity 51 are provided at the lower end of the bushing 50 in the circumferential direction, the diameter of the through holes 55 is smaller than an opening communicating with the water outlet cavity 14 inside the existing flow control pump, in order to ensure the water passing amount, a plurality of through holes 55 are provided, the plurality of through holes 55 can be uniformly distributed, a fifth sealing ring 53 is sleeved on the bushing 50 in the circumferential direction, the fifth sealing ring 53 is located above the through holes 55, the fifth sealing ring 53 is used for sealing a gap between the side wall of the switching rod 52 and the wall of the inner cavity 51, and it is avoided that the source water enters the inner cavity 51 above the fifth sealing ring 53 in advance through the gap, so that the first water outlet 18 has water flowing through, the effect of the switching of the water path of the switching rod 52 is affected, the through holes 55 are communicated with the water outlet flow channel 56, and the water path is communicated between the cavity and the first water outlet 18 and the second water outlet 17, when the flow control pump works, the switching rod 52 moves downwards in the inner cavity 51 under the action of the flow control assembly, when the fifth sealing ring 53 does not exceed the through hole 55, the water path between the first water outlet 18 and the through hole 55 is blocked, the water path between the second water outlet 17 and the through hole 55 is in a conducting state, the second water outlet 17 can be communicated with a heating or cooling water path of a clean drinking system to provide water for the clean drinking system, the switching rod 52 continues to move downwards in the inner cavity 51 as the voltage (power) of the flow control pump increases, when the fifth sealing ring 53 exceeds the through hole 55, at this time, the water path between the second water outlet 17 and the through hole 55 is blocked, the water path between the first water outlet 18 and the through hole 55 is communicated, and water enters the inner cavity 51 above the sealing surface of the wall of the switching rod 52 and the inner cavity 51 through the through hole 55 and then enters the first water outlet 18 to supply water to the normal-temperature water path in the clean drinking system; the water inlet end of the flow control double-way pump is provided with a fixed sleeve ring 32 and a valve body 34, the valve body 34 is sleeved in the fixed sleeve ring 32, the valve body 34 is in a convex shape and is internally provided with a concave cavity, the right end of the valve body 34 is connected with a valve cover 41, a water inlet 01 for a pressure water source to enter is arranged in the valve cover 41, the water inlet 01 is communicated with the concave cavity of the valve body 34, a pressure control component is arranged on a water path between the water inlet 01 and the water inlet hole 21 and is provided with a preset pressure value, when the pressure value of an external pressure water source is larger than the preset value, the pressure control component can reduce the water inlet amount and avoid the internal pressure building, so that the vacuum cavity 30 cannot be rapidly filled with the pressure water source, the normal up and down movement of the switching rod 52 can be effectively ensured, the water path is switched, the pressure control component can effectively adjust the water inlet amount of the pressure source water, and further change the water pressure at the water inlet end of the flow control double-way pump, therefore, the excessive water pressure entering the flow control double-way pump can be avoided, and the influence of the water pressure in the vacuum cavity 30 on the up-and-down movement distance of the switching rod 52 is reduced, so that the normal switching of the water path in the flow control double-way pump is ensured, and the flow control double-way pump can normally supply water for a clean drinking system.

Example 2

As shown in fig. 1 and 2, the pressure control assembly includes a first pressure sensing plate 35, a first return spring 05, and a first control rod 04, wherein an annular first sliding cavity 10 and a second sliding cavity 09 formed by a body of the pump head body 16 are disposed in the pump head body 16, the second sliding cavity 09 is located inside the first sliding cavity 10, a left end of the first pressure sensing plate 35 is smaller than a right end, the right end of the first pressure sensing plate 35 is connected with an inner wall of the valve body 34 in a sealing and sliding manner through a ninth sealing ring 33, the left end is connected with an inner wall of the first sliding cavity 10 in a sealing and sliding manner through an eighth sealing ring 07, an air cavity 06 communicated with the outside atmosphere is formed between the left side of the first pressure sensing plate 35 and the pump head body 16, a water inlet cavity 36 is formed between the right side and the valve body 34, the first control rod 04 is fixedly connected with a middle portion of the first pressure sensing plate 35, and a left end of the first control rod 04 is connected with an inner wall of the second sliding cavity 09 in a sealing and sliding manner through a sixth sealing ring 08, the right end of the water sealing sleeve ring 58 is sealed by a seventh sealing ring 03, a strip-shaped channel 02 for communicating the water inlet 01 with the second sliding cavity 09 is arranged in the first control rod 04, one end of a first return spring 05 acts on the pump head body 16, the other end acts on the first pressure sensing plate 35, a first flow limiting groove 39 is arranged on the side wall of the first control rod 04, a water outlet 37 for communicating a water path between the first flow limiting groove 39 and the water inlet 21 is arranged on the first pressure sensing plate 35, a flow passage communicated with the water outlet 37 is formed between the first control rod 04 and the first pressure sensing plate 35, the water outlet 37 is communicated with the water inlet cavity 36, a water passing groove 40 communicated with the water inlet 01 is formed between the valve body 34 at the right end of the first control rod 04, and the water passing groove 40 are communicated with the water inlet cavity 36 through the first flow limiting groove 39, the first control rod 04 forms a pressure control component for sealing the water sealing port 38 or controlling the conduction of the water sealing port 38 under the action of the air pressure in the air cavity 06, the water pressure in the water inlet cavity 36 and the first return spring 05.

The working principle in this embodiment is as follows: when the pressure water source at the water inlet 01 is smaller than the preset pressure value of the pressure control assembly, the water pressure acting on the first pressure sensing plate 35 is not enough to overcome the internal pressure of the air chamber 06 and the elastic force of the first return spring 05, at the moment, the first control rod 04 moves rightwards, the water path between the water inlet chamber 36 and the water inlet 01 is conducted through the first flow limiting groove 39, the water source can normally enter the pump, the water source enters the water passing groove 40 through the water inlet 01, enters the water inlet chamber 36 through the first flow limiting groove 39 and enters the vacuum chamber 30 of the pump through the water inlet 37, and the water amount entering the vacuum chamber 30 cannot change rapidly due to the small pressure value, so that the switching rod 52 can normally move upwards and downwards to perform water path switching; when the pressure value of the pressure water source is greater than the preset value of the pressure control assembly, due to the action of the strip-shaped channel 02, the pressure values at the two ends of the first control rod 04 are offset, the source water enters the water inlet cavity 36 through the first flow limiting groove 39, the water pressure acts on the first pressure sensing plate 35, overcomes the elastic force of the first return spring 05 and the air pressure in the air cavity 06, and urges the first pressure sensing plate 35 to slide leftward, and drives the first control rod 04 to move leftward (in the direction of the second sliding cavity 09), so that the flow passage area communicated between the first flow limiting groove 39 and the water passing groove 40 is gradually reduced, the entering water amount is also reduced, the water pressure at the water inlet end of the pump is controlled, the water amount cannot rapidly enter the vacuum cavity 30, the influence of the switching rod 52 on up-down movement due to excessive water amount in the vacuum cavity 30 is reduced, when the first control rod 04 continues to move leftward until the seventh sealing ring 03 exceeds the tail end of the water groove 40, the flow passage between the first water flow restriction groove 39 and the water passing groove 40 is closed so that the source water is blocked.

Example 3

As shown in fig. 1 and 2, the flow control assembly includes a second control rod 23, a second return spring 27, and a second pressure sensing plate 25, the upper end of the second control rod 23 is connected to the bottom surface of the second pressure sensing plate 25, the lower end of the second control rod 23 is connected to a switching rod 52, the periphery of the second pressure sensing plate 25 is in sealing contact with the sidewall of the vacuum chamber 30, the pump head cover 26 is arranged at the upper end of the pump head body 16, an atmosphere chamber 29 is formed between the second pressure sensing plate 25 and the pump head cover 26, and an atmosphere hole 31 for communicating the atmosphere chamber 29 is arranged on the pump head cover 26; a second flow limiting groove 28 is formed in the side wall of the second control rod 23, a first sealing ring 22, a supporting sleeve ring 20 and a second sealing ring 19 are sequentially arranged on the second control rod 23 in the circumferential direction, a water inlet hole 21 communicated with the water inlet 01 is formed in the supporting sleeve ring 20, and the first sealing ring 22, the supporting sleeve ring 20 and the second sealing ring 19 are tightly pressed between the water sealing sleeve ring 58 and the lining 50; one end of the second return spring 27 acts on the bottom surface of the second pressure sensing plate 25, the other end acts on the water sealing collar 58, and the second control rod 23 forms a flow control assembly for sealing or communicating a water path between the water inlet 01 and the vacuum chamber 30 under the combined action of the air pressure in the atmosphere chamber 29, the pressure in the vacuum chamber 30 and the second return spring 27.

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 30 and the elastic force of the second return spring 27 on the second pressure sensing plate 25 is larger than the acting force of the pressure in the atmosphere cavity 29 on the second pressure sensing plate 25, and the second control rod 23 seals a water channel between the water inlet hole 21 and the vacuum cavity 30 under the combined action of the acting forces; when the flow control pump works, water flow or air in the vacuum cavity 30 is sucked away to form a certain vacuum degree, at this time, the sum of acting forces of the pressure in the vacuum cavity 30 and the elastic force of the second return spring 27 on the second pressure sensing plate 25 is smaller than the acting force of the pressure in the atmosphere cavity 29 on the second pressure sensing plate 25, the second control rod 23 moves downwards (in the direction of the water outlet cavity 14) under the combined action of the acting forces, the second flow limiting groove 28 is arranged on the side wall of the second control rod 23, that is, the lower end of the second control rod 23 is not provided with the second flow limiting groove 28, the side wall above the lower end and below the second pressure sensing plate 25 is provided with the second flow limiting groove 28, the part of the lower end of the second control rod 23 without the second flow limiting groove 28 completely moves downwards to the upper end of the water inlet hole 21, and when the water inlet 01 is continuously moved downwards, the water inlet 01 is communicated with the vacuum cavity 30 through the second flow limiting groove 28 and the water inlet hole 21. When the second flow limiting groove 28 of the second control rod 23 just moves down to the upper end of the water inlet hole 21, the flow channel through which the water inlet 01 is communicated with the vacuum chamber 30 through the second flow limiting groove 28 is small, the flow rate pumped by the flow control pump is small, and if the second control rod 23 continues to move down and the portion of the second control rod 23 having the second flow limiting groove 28 moves down to exceed the lower end of the water inlet hole 21, the flow channel area through which the water inlet 01 is communicated with the vacuum chamber 30 through the second flow limiting groove 28 is increased, and the flow rate pumped by the flow control pump is increased. Therefore, by adjusting the working voltage (power) of the flow control pump, the vacuum in the vacuum chamber 30 can be adjusted, and the distance that the second control rod 23 moves down is further adjusted, so as to achieve the function of adjusting the output flow rate of the flow control pump, and meanwhile, the up-and-down movement of the second control rod 23 can also drive the up-and-down movement of the switching rod 52, so as to adjust the working voltage (power) of the flow control pump, and also achieve the switching function of adjusting the connection or blocking of the water paths between the first water outlet 18, the second water outlet 17 and the through hole 55.

Example 4

As shown in fig. 1 and 2, a third sealing ring 54 is sleeved on the periphery of the bushing 50, and the third sealing ring 54 is located between the through hole 55 and the first water outlet 18. The third sealing ring 54 is used to seal the installation gap between the liner 50 and the inner wall of the pump head body 16, so as to prevent the water in the water outlet channel 56 from entering the first water outlet 18 in advance.

The periphery of the second pressure sensing plate 25 is sealed with the side wall of the vacuum cavity 30 by a fourth sealing ring 24. The fourth sealing ring 24 is used for sealing a gap between the side surface of the second pressure sensing plate 25 and the inner side wall of the vacuum chamber 30, so as to prevent water in the vacuum chamber 30 from entering the atmosphere chamber 29 and then flowing out of the atmosphere hole 31 to the outside, thereby causing water seepage of the flow control pump.

The periphery of the lower end of the switching rod 52 is sealed with the side wall of the inner cavity 51 through a fifth sealing ring 53. The fifth sealing ring 53 is used for sealing a gap between the side wall of the switching rod 52 and the wall of the inner cavity 51, so that source water is prevented from entering the inner cavity 51 above the fifth sealing ring 53 in advance through the gap, water flows through the first water outlet 18, and the function of switching the waterway of the switching rod 52 cannot be influenced.

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 (9)

1. A pressure control structure of a flow control two-way pump comprises a pump body (16), a pressurizing cavity (13), a water outlet cavity (14) and a vacuum cavity (30) are arranged in the pump body (16), a first water outlet (18), a second water outlet (17) and a water inlet end are arranged on the pump body (16), the vacuum cavity (30) is communicated with the pressurizing cavity (13) through a water inlet groove (15) and a water inlet one-way structure (45), the pressurizing cavity (13) is communicated with the water outlet cavity (14) through a water outlet one-way structure (44), a water sealing sleeve ring (58) and a flow control assembly for controlling the water sealing or the water conduction at the position of the water sealing sleeve ring (58) are formed on a water path where the water inlet end and the vacuum cavity (30) are communicated, a switching rod (52) for controlling the connection or the blockage of the first water outlet (18) and the second water outlet (17) with the water outlet cavity (14) respectively is arranged on the flow control assembly, and a lining (50) is further arranged in the pump body (16), be equipped with in bush (50) and be used for switching rod (52) gliding inner chamber (51), inner chamber (51) and first delivery port (18) switch-on, the lower extreme circumference of bush (50) is a plurality of through-holes (55) that lead to with inner chamber (51) of cyclic annular distribution, through-hole (55) and play water cavity (14) switch-on, its characterized in that, be equipped with fixed lantern ring (32) on the intake end, cup jointed valve body (34) on fixed lantern ring (32), be equipped with water inlet (01) on valve body (34), be equipped with on the water route of water inlet (01) and inlet opening (21) switch-on and seal mouth of a river (38) and control and seal the accuse pressure components that perhaps lead to of water route department of controlling and sealing mouth of a river (38).

2. The pressure control structure of a flow-control two-way pump according to claim 1, wherein the pressure control assembly comprises a first pressure sensing plate (35), a first return spring (05) and a first control rod (04), a first sliding cavity (10) and a second sliding cavity (09) are arranged in the pump head body (16), one end of the first pressure sensing plate (35) is connected with the inner wall of the valve body (34) in a sealing and sliding manner, the other end of the first pressure sensing plate is connected with the inner wall of the first sliding cavity (10) in a sealing and sliding manner, an air cavity (06) is formed between one side of the first pressure sensing plate (35) and the pump head body (16), a water inlet cavity (36) is formed between the other side of the first pressure sensing plate and the valve body (34), the first control rod (04) is fixedly connected with the middle of the first pressure sensing plate (35), one end of the first control rod (04) is connected with the inner wall of the second sliding cavity (09) in a sealing and sliding manner, the other end of the first control rod (04) is provided with a water sealing opening (38), and a strip-shaped channel for communicating the water inlet (01) with the second sliding cavity (09) is arranged in the first control rod (04) (02) The utility model discloses a pump body, first reset spring (05) one end acts on pump head body (16), the other end acts on first pressure sensing board (35), be equipped with first limit chute (39) on first control lever (04) lateral wall, be equipped with on first pressure sensing board (35) and put through mouth of a river (37) of crossing in the water route between first limit chute (39) and inlet opening (21), first control lever (04) constitute sealed mouth of a river (38) or the accuse pressure subassembly that the control mouth of a river (38) switched on under the effect jointly in air chamber (06) atmospheric pressure, inlet chamber (36) water pressure, first reset spring (05).

3. The pressure control structure of a flow-control two-way pump according to claim 2, wherein a sixth sealing ring (08) and a seventh sealing ring (03) are respectively arranged at the two ends of the first control rod (04) in the circumferential direction, and an eighth sealing ring (07) and a ninth sealing ring (33) are respectively arranged at the two ends of the first pressure sensing plate (35) in the circumferential direction.

4. The pressure control structure of a flow control two-way pump according to claim 1, wherein the flow control assembly comprises a second control rod (23), a second return spring (27) and a second pressure sensing plate (25), the upper end of the second control rod (23) is connected with the bottom surface of the second pressure sensing plate (25), the lower end of the second control rod (23) is connected with a switching rod (52), the periphery of the second pressure sensing plate (25) is in sealing contact with the side wall of the vacuum chamber (30), the upper end of the pump head body (16) is provided with a pump head cover (26), an atmosphere chamber (29) is formed between the second pressure sensing plate (25) and the pump head cover (26), and the pump head cover (26) is provided with an atmosphere hole (31) for communicating the atmosphere chamber (29); a second flow limiting groove (28) is formed in the side wall of the second control rod (23), a first sealing ring (22), a supporting sleeve ring (20) and a second sealing ring (19) are sequentially arranged on the second control rod (23) in the circumferential direction, the water inlet hole (21) is formed in the supporting sleeve ring (20), and the first sealing ring (22), the supporting sleeve ring (20) and the second sealing ring (19) are tightly pressed between the water sealing sleeve ring (58) and the lining (50); one end of a second return spring (27) acts on the bottom surface of the second pressure sensing plate (25), the other end of the second return spring acts on a water sealing sleeve ring (58), and a second control rod (23) forms a flow control assembly for sealing or communicating a water path between the water inlet (01) and the vacuum cavity (30) under the combined action of the air pressure in the atmosphere cavity (29), the pressure in the vacuum cavity (30) and the second return spring (27).

5. The pressure control structure of a flow-control two-way pump according to claim 1, wherein the bushing (50) is peripherally sleeved with a third sealing ring (54), and the third sealing ring (54) is located between the through hole (55) and the first water outlet (18).

6. The pressure control structure of a flow control two-way pump according to claim 4, wherein the periphery of the second pressure sensing plate (25) is sealed with the side wall of the vacuum chamber (30) by a fourth sealing ring (24).

7. The pressure control structure of a flow-control two-way pump according to claim 1, wherein the switching rod (52) is sealed between the lower end periphery and the side wall of the inner cavity (51) by a fifth sealing ring (53).

8. The pressure control structure of a flow-control two-way pump according to claim 1, wherein a water outlet flow passage (56) formed by the body of the pump head body (16) is arranged between the through hole (55) and the water outlet cavity (14).

9. The pressure control structure of a flow-control two-way pump according to claim 1, wherein the side wall of the bushing (50) is provided with a water outlet (49) for communicating a water path between the inner cavity (51) and the first water outlet (18).

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