Water-saving valve capable of adjusting water outlet flow

Abstract

The invention discloses a water-saving valve capable of adjusting water outlet flow, which relates to the technical field of water-saving valves, and comprises a valve body, and further comprises a throat part which is arranged in a main flow channel of the valve body and is a circulation section with the narrowest sectional area in the main flow channel; the communicating pipe is in through connection with the radial side wall of the throat part, so that the communicating pipe is communicated with the throat part in pressure; the liquid level response part is arranged in the communicating pipe and can move in the axial direction of the communicating pipe to adjust the hydraulic pressure of the throat part; during use, the axial displacement of the liquid level response piece in the communicating pipe is converted into the displacement of the movable plug in the throat part through the transmission assembly, so that the overflowing sectional area of the throat part is changed, and the water outlet flow is adjusted. A pressure communication relation is established between the throat part and the communicating pipe, so that the pressure change of the throat part can cause the height change of the liquid level in the communicating pipe, and the movable plug is driven by the liquid level response piece and the transmission assembly to change the overflowing sectional area of the throat part, so that linkage adjustment based on the flowing state is formed.

Description

Technical Field

[0001] This invention relates to the field of water-saving valve technology, and specifically to a water-saving valve with adjustable water flow rate. Background Technology

[0002] Water-saving valves are widely used to control the outflow of water in order to reduce water consumption and improve water resource utilization efficiency. Existing water-saving valves typically use fixed-orifice throttling elements, rubber flow restrictors, needle valve structures, or simple mechanical regulating valves to restrict water flow. Their basic principle is to reduce the outflow volume per unit time by reducing the flow cross-sectional area.

[0003] Most existing technologies employ static throttling structures, where the throttling capacity is directly coupled to the water supply pressure. When the water supply pressure changes, especially during peak water usage or when switching between different water supply areas, the outflow rate fluctuates significantly with the pressure change, leading to unstable water-saving effects and difficulty in maintaining a constant or controllable outflow rate under different operating conditions. To improve these issues, some existing technologies have introduced pressure compensation structures, such as using elastic diaphragms, complex valve core assemblies, or multi-stage throttling structures to regulate the outflow rate. While these solutions can mitigate the impact of pressure fluctuations on flow rate to some extent, their structures are typically quite complex. Furthermore, existing water-saving valves mostly focus on direct throttling control of the main flow channel, lacking a real-time feedback mechanism for the flow state and unable to adaptively adjust the throttling state according to actual flow conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a water-saving valve with adjustable water flow rate to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A water-saving valve with adjustable outlet flow rate includes a valve body and a throat, which is disposed in the main flow channel of the valve body and is the narrowest flow section in the main flow channel. The connecting pipe is connected to the radial sidewall of the throat, so that the connecting pipe and the throat are connected under pressure; A liquid level response element is installed inside the connecting pipe, and it can move along the axial direction of the connecting pipe to adjust the hydraulic pressure at the throat; The movable plug is slidably connected inside the throat and is used to change the flow cross-sectional area of ​​the throat. A transmission assembly is disposed between the movable piston and the liquid level response element, and the movable piston and the liquid level response element are connected through the transmission assembly. In use, the axial displacement of the liquid level response element in the connecting pipe is converted into the displacement of the movable plug in the throat via the transmission assembly, thereby changing the flow cross-sectional area of ​​the throat to regulate the outflow rate. Preferably, the liquid level response element includes a pressure sealing plug that is axially slidably connected to the connecting pipe, and the pressure sealing plug is connected to the connecting pipe by a pressure spring.

[0006] Preferably, the cross-sectional area of ​​the movable plug is smaller than the narrowest cross-sectional area of ​​the throat.

[0007] Preferably, the valve body is provided with a water outlet, and a pressure stabilizing chamber is provided between the throat and the water outlet.

[0008] Preferably, the transmission assembly includes a sealed transmission block and a lever that are slidably connected in the pressure stabilizing chamber. One end of the lever is connected to the sealed transmission block, and the other end of the lever is connected to the pressure sealing plug.

[0009] Preferably, the lever includes a rocker arm hinged to the valve body, one end of which is hinged to a first connecting rod, the end of the first connecting rod away from the rocker arm being hinged to a sealing transmission block.

[0010] Preferably, the other end of the swing arm is hinged to a second connecting rod, and the end of the second connecting rod away from the swing arm is hinged to the sealing plug.

[0011] Preferably, the movable plug and the sealing transmission block are connected by a connector, so that the radial sliding stroke of the sealing block in the pressure stabilizing chamber drives the movable plug to move in the throat, thereby changing the flow cross-sectional area of ​​the throat.

[0012] Preferably, the connector includes a drive pin fixedly connected to the movable plug and a drive groove formed on the sealed drive block that is adapted to the drive pin, wherein the drive pin is located in the drive groove.

[0013] Preferably, the connecting pipe is provided with a damping orifice section, which is used to limit the speed at which the throat pressure change is transmitted into the connecting pipe, so as to suppress the high-frequency reciprocating movement of the liquid surface response element. The damping orifice section is at least one of a throttling orifice, a capillary channel or a labyrinth flow channel provided on the inner wall of the connecting pipe.

[0014] Beneficial effects In the above technical solution, the present invention provides a water-saving valve with adjustable outlet flow rate. By establishing a pressure connection between the throat and the connecting pipe, changes in throat pressure can cause changes in the liquid level in the connecting pipe. The liquid level response component and the transmission assembly drive the movable plug to change the flow cross-sectional area of ​​the throat, thereby forming a linkage adjustment based on the flow state. At the same time, it can automatically compensate for the influence of water pressure fluctuations according to the pressure changes in the throat, ensuring that the flow rate adjustment remains accurate under different water pressures, thereby achieving precise adjustment of the outlet flow rate.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0016] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the water-saving valve provided in an embodiment of the present invention; Figure 2 A schematic diagram of the installation structure of the movable plug provided in an embodiment of the present invention; Figure 3 A schematic diagram of a pressure spring structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the sealing transmission block installation structure provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the swing arm mounting structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the valve body structure provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the connecting pipe provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Valve body; 1.01. Inlet; 1.02. Outlet; 1.03. Slide groove; 1.1. Throat; 1.10. Movable plug; 1.101. Drive pin; 1.11. Pressure stabilizing chamber; 1.2. Connecting pipe; 1.20. Pressure spring; 1.21. Pressure sealing plug; 1.3. Hinge seat; 1.4. Sealing transmission block; 1.40. Transmission groove; 1.5. First connecting rod; 1.6. Rocker arm; 1.7. Second connecting rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0021] Reference Figure 1-7 As shown, the present invention provides a water-saving valve with adjustable outlet flow rate, including a valve body 1 and a throat 1.1, which is disposed in the main flow channel of the valve body 1 and is the narrowest flow section in the main flow channel. Connecting pipe 1.2 is connected to the radial sidewall of throat 1.1, so that connecting pipe 1.2 and throat 1.1 are connected under pressure; A liquid level response element is installed inside the connecting pipe 1.2, and it can move along the axial direction of the connecting pipe 1.2 to adjust the hydraulic pressure of the throat 1.1; The movable plug 1.10 is slidably connected inside the throat 1.1 and is used to change the flow cross-sectional area of ​​the throat 1.1. A transmission assembly is disposed between the movable plug 1.10 and the liquid level response element, and the movable plug 1.10 and the liquid level response element are connected through the transmission assembly; In use, the axial displacement of the liquid level response element in the connecting pipe 1.2 is converted into the displacement of the movable plug 1.10 in the throat 1.1 via the transmission assembly, thereby changing the flow cross-sectional area of ​​the throat 1.1 to regulate the outflow rate. like Figure 1-4 As shown, the valve body 1 includes an inlet 1.01 and an outlet 1.02. The end of the inlet 1.01 can be sealed to the inlet pipe via a flange, thread, or other means. The end of the outlet 1.02 can be sealed to the outlet pipe via a flange, thread, or other means. The main flow channel of the valve body 1 is located at the inlet 1.01 of the valve body 1. A throat 1.1 is provided inside the valve body 1 between the inlet 1.01 and the outlet 1.02. The cross-section of the throat 1.1 is the narrowest part of the valve body 1. The throat 1.1 is connected to the inlet 1.01, and a contraction section connects the throat 1.1 and the inlet 1.01. 01. The throat 1.1 and the outlet 1.02 are connected through a diffuser section, and a straight pipe section with no change in cross-sectional area is provided between the diffuser section and the outlet 1.02. The valve body 1 is provided with an outlet 1.02. A pressure stabilizing chamber 1.11 is provided between the throat 1.1 and the outlet 1.02. The straight pipe section is located in the pressure stabilizing chamber 1.11. The function of the pressure stabilizing chamber 1.11 is to form a "pressure buffer and decoupling zone" between the throat 1.1 adjustment mechanism and the outlet end, so that the pressure change of the throat 1.1 will not be instantaneously reversed by the downstream water use conditions, thereby ensuring the stability of the liquid level response and the adjustment of the movable plug 1.10.

[0022] A connecting pipe 1.2 is connected through the narrowest section of the throat 1.1 in the radial direction of the valve body 1. The connecting pipe 1.2 is used to introduce the pressure state of the throat 1.1 into the connecting pipe 1.2, so that the liquid level in the connecting pipe 1.2 changes position with the pressure change of the throat 1.1, thereby providing a pressure input signal to the liquid level response element, and converting the pressure signal into an adjustment action of the movable plug 1.10 through the transmission component.

[0023] A liquid level response element, installed within the connecting pipe 1.2, is axially movable along the connecting pipe 1.2 to regulate the hydraulic pressure at the throat 1.1, allowing the liquid level response element to reciprocate along the axial direction of the connecting pipe 1.2. The connecting pipe 1.2 and the throat 1.1 are pressure-connected. When the fluid pressure within the throat 1.1 changes, it is transmitted to the interior of the connecting pipe 1.2, causing a corresponding change in the liquid level. This change in liquid level generates an axial force on the liquid level response element; that is, increased pressure at the throat 1.1 → increased liquid level in the connecting pipe 1.2, decreased pressure at the throat 1.1 → increased liquid level. The liquid level in connecting pipe 1.2 drops, thereby driving the liquid level response element to displace along the axial direction of connecting pipe 1.2. The axial displacement of the liquid level response element corresponds to the change in liquid level height within connecting pipe 1.2, enabling the liquid level response element to react to pressure changes in throat 1.1. Through the axial movement of the liquid level response element, the hydraulic pressure change in throat 1.1 is transmitted from the transmission component to the movable plug 1.10, causing the movable plug 1.10 to move within throat 1.1, thereby changing the flow cross-sectional area of ​​throat 1.1 and achieving linkage adjustment of the hydraulic state of throat 1.1. The liquid level response element does not directly and actively drive the liquid, but rather acts as a passive response component to hydraulic pressure changes in throat 1.1. Its direction and amplitude of movement are determined by the pressure changes in throat 1.1, thus ensuring the adaptability and stability of the hydraulic adjustment process.

[0024] The movable plug 1.10 is disposed inside the throat 1.1 and moves axially in the throat 1.1, thus changing the flow cross-sectional area of ​​the throat 1.1. When the volume of the movable plug 1.10 extending into the flow area of ​​the throat 1.1 increases, the flow cross-sectional area of ​​the throat 1.1 decreases accordingly; when the movable plug 1.10 moves in the opposite direction, the volume of the movable plug 1.10 extending into the flow area of ​​the throat 1.1 decreases, and the flow cross-sectional area of ​​the throat 1.1 increases accordingly. The movable plug 1.10 can move radially or axially along the throat 1.1, depending on the structure of the throat 1.1. The cross-sectional area of ​​the movable plug 1.10 is smaller than the narrowest cross-sectional area of ​​the throat 1.1, so that the movable plug 1.10 does not act as a completely closed shut-off component of the throat 1.1, but rather as a variable throttling component. Throughout the adjustment process, it maintains at least a preset minimum flow cross-sectional area in the throat 1.1 to prevent complete blockage and abnormal flow. The movement of the movable plug 1.10 is achieved through a transmission assembly linked to a liquid surface response component, allowing the change in the flow cross-sectional area of ​​the throat 1.1 to be dynamically adjusted according to the hydraulic pressure of the throat 1.1, thereby achieving stable and controllable flow rate regulation under different operating conditions.

[0025] A transmission assembly is disposed between the movable plug 1.10 and the liquid level response element, and the movable plug 1.10 and the liquid level response element are connected by the transmission assembly. The transmission assembly connects the movable plug 1.10 and the liquid level response element, so that the stroke of the liquid level response element in the connecting pipe 1.2, when the liquid level rises or falls, drives the movable plug 1.10 to move axially or radially in the throat, thereby changing the flow cross-sectional area at the throat. In the prior art, preferably, the transmission assembly converts the radial linear motion of the valve body 1 into horizontal linear motion. In the prior art, mechanical transmission mechanisms that can convert vertical linear motion into horizontal linear motion, such as crank-slider mechanisms, connecting rod mechanisms, wedge mechanisms, or other mechanical structures that can convert vertical linear motion into horizontal linear motion, are all suitable for this embodiment.

[0026] During operation, the water flow within the throat 1.1 experiences localized acceleration as it passes through the main flow channel, creating a pressure state at the throat 1.1 that differs from other locations in the main flow channel. This causes an axial change in the liquid level within the connecting pipe 1.2, driving the liquid level response element. The axial displacement of the liquid level response element is transmitted and converted through a transmission assembly. This transmission assembly converts the axial displacement of the liquid level response element into the displacement of the movable plug 1.10 within the throat 1.1. When the movable plug 1.10 moves towards the center of the throat 1.1, the flow cross-sectional area of ​​the throat 1.1 decreases, restricting the water flow through the throat 1.1 and correspondingly reducing the outlet flow rate. Conversely, when the movable plug 1.10 moves away from the center of the throat 1.1, the flow cross-sectional area of ​​the throat 1.1 increases, increasing the water flow through the throat 1.1 and correspondingly increasing the outlet flow rate. This achieves a linkage adjustment between the displacement of the liquid level response element and the change in the flow cross-sectional area of ​​the throat 1.1, thereby enabling continuous regulation of the outlet flow rate.

[0027] Since the displacement of the liquid level response element is caused by the pressure change at the throat 1.1, the valve body 1 can form an automatic adjustment process that changes with the operating conditions during the change of the water flow rate, making the adjustment of the water flow rate more stable and improving the adaptability and stability of the valve body 1 under different water use conditions.

[0028] Reference Figure 2-6 As shown, in another embodiment of the present invention, the liquid level response element includes a pressure sealing plug 1.21 that is axially slidably connected to the connecting pipe 1.2, and the pressure sealing plug 1.21 and the connecting pipe 1.2 are connected by a pressure spring 1.20.

[0029] The transmission assembly includes a sealed transmission block 1.4 slidably connected in the pressure stabilizing chamber 1.11 and a lever. One end of the lever is connected to the sealed transmission block 1.4, and the other end of the lever is connected to the pressure sealing plug 1.21.

[0030] The lever component includes a rocker arm 1.6 hinged to the valve body 1, one end of the rocker arm 1.6 is hinged to a first connecting rod 1.5, and the end of the first connecting rod 1.5 away from the rocker arm 1.6 is hinged to the sealing transmission block 1.4.

[0031] The other end of the swing arm 1.6 is hinged to a second connecting rod 1.7, and the end of the second connecting rod 1.7 away from the swing arm 1.6 is hinged to a sealing plug.

[0032] The movable plug 1.10 is connected to the sealing transmission block 1.4 by a connector, so that the radial sliding stroke of the sealing block in the pressure stabilizing chamber 1.11 drives the movable plug 1.10 to move in the throat 1.1, thereby changing the flow cross-sectional area of ​​the throat 1.1.

[0033] The connector includes a transmission pin 1.101 fixedly connected to the movable plug 1.10 and a transmission groove 1.40 formed on the sealed transmission block 1.4 that is adapted to the transmission pin 1.101. The transmission pin 1.101 is located in the transmission groove 1.40.

[0034] Specifically, one end of the connecting pipe 1.2 is connected to the narrowest point of the throat 1.1 of the valve body 1, and the other end of the connecting pipe 1.2 is connected to the outside. A pressure sealing plug 1.21 is slidably connected axially inside the connecting pipe 1.2. The pressure sealing plug 1.21 divides the connecting pipe 1.2 into two parts: one part is connected to the atmosphere, and the other part is connected to the throat. When the fluid pressure inside the throat 1.1 changes, a pressure difference is generated on both sides of the pressure sealing plug 1.21, thereby regulating the liquid level inside the connecting pipe 1.2. The pressure sealing plugs 1.21 are connected by a spring. One end of the pressure spring 1.20 is fixedly connected to the top of the inner wall of the connecting pipe 1.2, and the other end is fixedly connected to the pressure sealing plug 1.21. The pressure spring 1.20 provides a clear initial position and restoring force for the pressure sealing plug 1.21, allowing the displacement of the pressure sealing plug 1.21 to change gradually with the pressure change at the throat 1.1. This suppresses high-frequency reciprocating vibration of the pressure sealing plug 1.21 under rapid pressure fluctuations, ensuring that the pressure sealing plug 1.21 undergoes a gradual change in pressure at the throat 1.1. The valve body 1 has a defined equilibrium operating point, thereby improving the operational stability and service life of the entire valve body 1 during actual use and preventing disordered drift of the pressure sealing plug 1.21 due to liquid inertia or transient pressure fluctuations. A hinge seat 1.3 is fixedly connected to one side of the connecting pipe 1.2 on the valve body 1. A sliding groove 1.03 adapted to the sealing transmission block 1.4 is opened on the diameter of the pressure stabilizing chamber 1.11. The sealing transmission block 1.4 is slidably connected to the inside of the pressure stabilizing chamber 1.11 through the sliding groove 1.03. A rocker arm 1.6 is hinged to the hinge seat 1.3. One end of the rocker arm 1.6 The device is hinged by a first connecting rod 1.5. The other end of the first connecting rod 1.5, away from the swing rod 1.6, is hinged to the sealing transmission block 1.4. The other end of the swing rod 1.6, away from the first connecting rod 1.5, is hinged to a second connecting rod 1.7. One end of the second connecting rod 1.7 is hinged to the pressure sealing plug 1.21. A movable plug 1.10 is slidably connected in the axial direction of the throat. A transmission pin 1.101 is fixedly connected in the axial direction of the movable plug 1.10. A transmission groove 1.40 adapted to the transmission pin 1.101 is provided on the sealing transmission block 1.4. The transmission groove 1.40 is a wedge-shaped structure.

[0035] During use, the water flow in the throat 1.1 experiences localized acceleration as it passes through the main channel, creating a pressure difference between the throat 1.1 and the main channel. This causes an axial change in the liquid level within the connecting pipe 1.2, driving the pressure sealing plug 1.21 to move axially within the connecting pipe 1.2. This compression of the spring compresses the pressure sealing plug 1.21, causing the second connecting rod 1.7 to move. The second connecting rod 1.7 then drives the swing rod 1.6 to swing, which in turn drives the first connecting rod 1.5. The first connecting rod 1.5 then moves the sealing transmission block 1.4 within the pressure stabilizing chamber 1.11. The radial upward sliding causes the sealing transmission block 1.4 to move the movable plug 1.10, which is slidably connected to it, within the throat 1.1. This converts the axial displacement of the movable plug 1.10 into its displacement within the throat 1.1. When the movable plug 1.10 moves towards the center of the throat 1.1, the flow cross-sectional area of ​​the throat 1.1 decreases, restricting the water flow and thus reducing the outlet flow rate. Conversely, when the movable plug 1.10 moves away from the center of the throat 1.1, the flow cross-sectional area increases, increasing the water flow and thus increasing the outlet flow rate. This achieves a linkage adjustment between the displacement of the liquid surface response component and the change in the flow cross-sectional area of ​​the throat 1.1, thereby enabling continuous regulation of the outlet flow rate.

[0036] Reference Figure 7 As shown, in another embodiment of the present invention, a damping orifice section is provided on the connecting pipe 1.2. The damping orifice section is used to limit the speed at which the pressure change of the throat 1.1 is transmitted into the connecting pipe 1.2, so as to suppress the high-frequency reciprocating movement of the liquid surface response element. The damping orifice section is at least one of the following: a throttling orifice, a capillary channel, or a labyrinthine flow channel provided on the inner wall of the connecting pipe 1.2.

[0037] Specifically, a damping orifice section is provided on the connecting pipe 1.2. The damping orifice section is located on the communication path between the connecting pipe 1.2 and the throat 1.1 or in the axial channel of the connecting pipe 1.2. It is used to limit and regulate the transmission of pressure changes from the throat 1.1 into the connecting pipe 1.2. The damping orifice section creates a throttling resistance to the flow of fluid in the connecting pipe 1.2, thus delaying and smoothing the transmission of transient pressure changes from the throat 1.1 into the connecting pipe 1.2, thereby preventing rapid reciprocating flow of the liquid in the connecting pipe 1.2.

[0038] In this embodiment, the damping orifice section is preferably at least one of a throttling orifice, a capillary channel, or a labyrinthine flow channel disposed on the inner wall of the connecting pipe 1.2. The throttling orifice is a through-hole structure with a predetermined orifice diameter, the capillary channel is a slender flow channel structure extending axially or circumferentially along the inner wall of the connecting pipe 1.2, and the labyrinthine flow channel is a tortuous flow channel structure formed by a combination of multiple turning channels, which can produce a stable damping effect on the fluid flow without significantly changing the overall structure of the connecting pipe 1.2.

[0039] When the pressure in the throat 1.1 changes rapidly, the pressure difference between the throat 1.1 and the connecting pipe 1.2 drives the fluid to enter or leave the connecting pipe 1.2 through the damping orifice. Due to the limiting effect of the damping orifice on the fluid flow, the pressure change in the connecting pipe 1.2 exhibits a delayed and buffered characteristic relative to the pressure change in the throat 1.1, making the change of the liquid level in the connecting pipe 1.2 tend to be gradual, thereby suppressing the high-frequency reciprocating movement of the liquid level response element in a short period of time.

[0040] By setting a damping orifice section, the axial displacement of the liquid surface response element can primarily reflect the overall pressure change trend at throat 1.1, rather than instantaneous pulsations. This improves the stability and controllability of the linkage adjustment process between the liquid surface response element and the movable plug 1.10, avoiding abnormal vibrations caused by water hammer, transient impacts, or fluid pulsations. The damping orifice section is not used to regulate the outflow rate in the main channel; it only acts on the pressure transmission process between throat 1.1 and connecting pipe 1.2. By adjusting the pressure transmission speed, stable control of the liquid surface response element's motion state is achieved.

[0041] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A water-saving valve with adjustable outlet flow rate, comprising a valve body (1), characterized in that, It also includes a throat (1.1), which is located in the main flow channel of the valve body (1) and is the narrowest flow section in the main flow channel; The connecting pipe (1.2) is connected to the radial sidewall of the throat (1.1) so that the connecting pipe (1.2) and the throat (1.1) are connected under pressure; A liquid level response element is installed inside the connecting pipe (1.2), and it can move axially along the connecting pipe (1.2) to adjust the hydraulic pressure of the throat (1.1); The movable plug (1.10) is slidably connected inside the throat (1.1) and is used to change the flow cross-sectional area of ​​the throat (1.1); A transmission assembly is disposed between the movable piston (1.10) and the liquid level response element, and the movable piston (1.10) and the liquid level response element are connected through the transmission assembly; In use, the axial displacement of the liquid level response element in the connecting pipe (1.2) is converted into the displacement of the movable plug (1.10) in the throat (1.1) via the transmission assembly, thereby changing the flow cross-sectional area of ​​the throat (1.1) to regulate the outflow rate.

2. The water-saving valve with adjustable outlet flow rate according to claim 1, characterized in that, The liquid level response device includes a pressure sealing plug (1.21) that is axially slidably connected to the connecting pipe (1.2), and the pressure sealing plug (1.21) is connected to the connecting pipe (1.2) by a pressure spring (1.20).

3. A water-saving valve with adjustable outlet flow rate according to claim 1, characterized in that, The cross-sectional area of ​​the movable plug (1.10) is smaller than the narrowest cross-sectional area of ​​the throat (1.1).

4. A water-saving valve with adjustable outlet flow rate according to claim 2, characterized in that, The valve body (1) is provided with an outlet (1.02), and a pressure stabilizing chamber (1.11) is provided between the throat (1.1) and the outlet (1.02).

5. A water-saving valve with adjustable outlet flow rate according to claim 4, characterized in that, The transmission assembly includes a sealed transmission block (1.4) slidably connected in the pressure stabilizing chamber (1.11) and a lever. One end of the lever is connected to the sealed transmission block (1.4), and the other end of the lever is connected to the pressure sealing plug (1.21).

6. A water-saving valve with adjustable outlet flow rate according to claim 5, characterized in that, The lever includes a rocker arm (1.6) hinged to the valve body (1), one end of which is hinged to a first connecting rod (1.5), and the end of the first connecting rod (1.5) away from the rocker arm (1.6) is hinged to a sealing transmission block (1.4).

7. A water-saving valve with adjustable outlet flow rate according to claim 6, characterized in that, The other end of the swing arm (1.6) is hinged to a second connecting rod (1.7), and the end of the second connecting rod (1.7) away from the swing arm (1.6) is hinged to a sealing plug.

8. A water-saving valve with adjustable outlet flow rate according to claim 5, characterized in that, The movable plug (1.10) and the sealing transmission block (1.4) are connected by a connector, so that the radial sliding stroke of the sealing block in the pressure stabilizing chamber (1.11) drives the movable plug (1.10) to move in the throat (1.1), thereby changing the flow cross-sectional area of ​​the throat (1.1).

9. A water-saving valve with adjustable outlet flow rate according to claim 8, characterized in that, The connector includes a transmission pin (1.101) fixedly connected to the movable plug (1.10) and a transmission groove (1.40) formed on the sealed transmission block (1.4) and adapted to the transmission pin (1.101), wherein the transmission pin (1.101) is located in the transmission groove (1.40).

10. A water-saving valve with adjustable outlet flow rate according to claim 1, characterized in that, The connecting pipe (1.2) is provided with a damping orifice section, which is used to limit the speed at which the pressure change of the throat (1.1) is transmitted into the connecting pipe (1.2) to suppress the high-frequency reciprocating movement of the liquid surface response element. The damping orifice section is at least one of the following: a throttling orifice, a capillary channel, or a labyrinthine flow channel provided on the inner wall of the connecting pipe (1.2).

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